WO2018131364A1

WO2018131364A1 - Extension/retraction instrument

Info

Publication number: WO2018131364A1
Application number: PCT/JP2017/044418
Authority: WO
Inventors: 太田　晶久; 将也畝; 伸郎片原
Original assignee: Ｋｙｂ株式会社
Priority date: 2017-01-16
Filing date: 2017-12-11
Publication date: 2018-07-19
Also published as: JP2018113999A; TW201831805A

Abstract

Provided is an extension/retraction instrument capable of easily extending or retracting an extensible/retractable object that generates a repulsive force in the direction of extension. This extension/retraction instrument is provided with connection bodies (26), a winding part (20), a stop part (23) and an instrument lock part (25). The connection bodies (26) are detachably connected to both end parts of an extensible/retractable fall prevention device (9) to which a repulsive force is imparted in the direction of extension. The winding part (20) comprises a rotation shaft (22) for winding up the connection bodies (26). The stop part (23) stops rotation of the rotation shaft (22). The instrument lock part (25) is provided on the rotation shaft (22) and locks an instrument for rotating the rotation shaft (22).

Description

Telescopic tool

The present invention relates to an expansion / contraction tool that expands / contracts an expansion / contraction object that always generates force in the extension direction.

In order to prevent furniture and the like from shaking and falling due to the vibration of the earthquake, it is effective to use a fall prevention device equipped with a damper. In this overturn prevention device, a pair of bases that are in contact with the furniture and the ceiling are attached to both ends in the direction in which the pressure damper expands and contracts. When the fall prevention device is installed between the furniture and the ceiling, the damper needs to be installed in a contracted state. As a method of contracting the damper, the dimension between the pair of bases is obtained by connecting both ends of the fixed cable to each of the pair of base parts and winding the fixed cable at a winding part that can wind up the fixed cable. It is conceivable to use an expansion / contraction tool that shortens the length and contracts the damper.

As a specific example of this extendable tool, a configuration in which a fixed rope is wound using a winding device (hereinafter referred to as a winding device) of a wiring harness disclosed in Patent Document 1 as a winding unit can be considered. This winding device is an impact wrench having a fork (rotating shaft) formed in a bifurcated manner and connected to the tip, and having a one-way lock mechanism (stop portion). By winding a fixed cable having both ends connected to each of the pair of base portions in the winding device, the dimension between the pair of bases can be shortened and the damper can be contracted. This winding device can limit the rotation direction of the fork part to one direction by a one-way lock mechanism. As a result, the winding device can prevent the wound fixing cable from being unintentionally drawn out from the fork portion, and the contracted damper can be inadvertently extended before being installed between the furniture and the ceiling. Can be suppressed.

JP-A-11-199134

The fall prevention device is installed between the furniture and the ceiling with the damper contracted, and then the damper is extended to bring the pair of base portions into contact with the furniture and the ceiling. It is necessary to press the base part against the furniture and the ceiling. However, the fork portion of the winding device cannot rotate in the direction in which the fixed cable is extended. For this reason, when extending | stretching the damper of the contracted fall prevention apparatus, since an operator must pay out a fixed line from a fork part by hand, it is not convenient.

The present invention has been made in view of the above-described conventional situation, and it is an object to be solved to provide an extensible tool that is easy to use.

The extendable tool of the present invention includes a connecting body, a winding part, a stop part, and a tool locking part. The connecting body is extendable and detachably connected to both end portions of the expansion / contraction object to which a repulsive force is applied in the extending direction. The winding unit has a rotating shaft that winds the coupling body. A stop part stops rotation of a rotating shaft. The tool locking portion is provided on the rotating shaft and locks a tool that rotates the rotating shaft.

The stop unit of the present invention can stop the rotating shaft at every predetermined angle.

The expansion / contraction tool of the present invention can generate a resistance force that opposes the repulsion force when the connected body wound around the rotating shaft is drawn out by the repulsion force applied in the extending direction.

The winding unit of the present invention may have a gripping unit that grips when the rotating body is rotated to wind up the coupling body.

It is the schematic which shows the expansion-contraction tool of Embodiment 1. FIG. Schematic showing a state in which a stop piece comes into contact with a short side portion and a long side portion of a protruding portion of a ratchet plate of the extendable tool of Embodiment 1 and a stop piece is fitted into a notch portion of a lever portion. FIG. It is the schematic which shows the state which a stop piece contact | abuts to the short side part and long side part of the protrusion part of the ratchet board of the expansion-contraction tool of Embodiment 1, and the stop piece is not fitting to the notch part of a lever part. It is the schematic which shows the state which a stop piece contact | abuts to the 2nd arc side of the lever part of the expansion-contraction tool of Embodiment 1, and the stop piece does not contact | abut the short side part and long side part of the protrusion part of a ratchet board. It is a side view of the fall prevention device which is an expansion-contraction object. It is a front view of the fall prevention device which is an expansion-contraction object. It is a side view which shows the state which attached the expansion-contraction tool of Embodiment 1 to the fall prevention apparatus which is an expansion-contraction object, and has arrange | positioned the fall prevention apparatus between furniture and a ceiling. It is the schematic which shows the expansion-contraction tool of Embodiment 2. FIG. It is a principal part enlarged view which shows the stop part of the winding-up part of the expansion-contraction tool of Embodiment 3. FIG. It is a principal part enlarged view which shows the stop part of the winding-up part of the expansion-contraction tool of Embodiment 4. FIG. It is a principal part enlarged view which shows the stop part of the winding-up part of the expansion-contraction tool of Embodiment 5. FIG. It is the schematic which shows the state which the front-end | tip of the stop plate by the side of the 2nd operation part of the expansion-contraction tool of Embodiment 5 contact | abutted to the projection part of the ratchet board near a case (case) closing part. It is the schematic which shows the state which the front-end | tip of the stop plate by the side of the 1st operation part of the expansion-contraction tool of Embodiment 5 contact | abutted to the projection part of the ratchet board near a cover part. It is the schematic which shows the expansion-contraction tool of Embodiment 6. It is AA sectional drawing shown in FIG.

Embodiments 1 to 6 embodying the extendable tool of the present invention will be described with reference to the drawings.

<Embodiment 1>
As shown in FIGS. 1 to 4, the extendable tool of Embodiment 1 includes a winding unit 20, a tool locking unit 25, and a connecting body 26.

The winding unit 20 includes a winding unit main body 21, a rotating shaft 22, a stop unit 23, and a lever unit 24. The winding unit body 21 has a pair of first side plates 21A, a first connecting plate 21B, and a first connecting shaft 21C. The pair of first side plates 21A has a flat plate shape and extends in one direction, and both end portions are formed in an arc shape. These first side plates 21A have the same outer shape. These first side plates 21A face each other in parallel, and the dimension between them is a predetermined dimension. The first side plate 21A is provided with a first insertion hole 21D, a second insertion hole 21E, and a first long hole 21F penetrating in the thickness direction. The first insertion hole 21D is provided at one end of the first side plate 21A extending in one direction. The second insertion hole 21E is provided at the other end of the first side plate 21A extending in one direction. The first long hole 21F is formed long in the direction in which the first side plate 21A extends between the first insertion hole 21D and the second insertion hole 21E.

The first connecting plate 21B has a rectangular outer shape. The first connecting plate 21B has two sides that are parallel to each other among the four sides of the quadrangular shape, and are linear sides that connect one end and the other end of the pair of first side plates 21A formed in an arc shape. It is connected. The first connecting plate 21B is provided with a cut and raised portion 21G. The cut-and-raised portion 21G is connected to the side of the first connecting plate 21B located on the other end side of the first side plate 21A in a direction perpendicular to the first connecting plate 21B, and the first side plate 21A is opposed to the first connecting plate 21B. Located in the space between. The first connecting shaft 21C has a columnar shape, and is inserted into each of the second insertion holes 21E of the pair of first side plates 21A through both ends and connected to the pair of first side plates 21A.

Rotating shaft 22 extends in a cylindrical shape. The rotating shaft 22 is provided with a slit 22A. The slit 22 A bifurcates the rotating shaft 22 from one end of the rotating shaft 22 to the other end. In addition, a third insertion hole 22 B is provided at one end of the rotation shaft 22 so as to be orthogonal to the central axis of the rotation shaft 22. Further, a fourth insertion hole 22 C is provided through the other end of the rotation shaft 22 so as to be orthogonal to the central axis of the rotation shaft 22. The fourth insertion holes 22 C are provided coaxially with each other at the other end of the rotary shaft 22 formed in a bifurcated manner. The rotating shaft 22 is rotatably inserted in one end portion and the other end portion of each of the first insertion holes 21D of the pair of first side plates 21A of the winding portion main body 21.

The stop part 23 has a pair of ratchet plates 23A and a stop plate 23B. Each of the pair of ratchet plates 23A has a disk shape. These ratchet plates 23A have the same outer shape. A fifth insertion hole 23C is provided in the center of the disc-shaped ratchet plate 23A so as to penetrate in the thickness direction. The ratchet plate 23A is provided with a plurality of projecting portions 23D arranged in the circumferential direction on the disc-shaped outer periphery so as to project outward from the disc-shaped outer periphery. Each of the protruding portions 23D includes a short side portion 23E and a long side portion 23F. The short side portion 23E extends in the radial direction from the central axis of the disc-shaped ratchet plate 23A. The long side portion 23F is curved outward toward the outer periphery of the disk shape, one end is continuous with the tip of the short side portion 23E, and the other end is continuous with the base end of the short side portion 23E of the adjacent projecting portion 23D. Yes. The pair of ratchet plates 23 A are connected to the rotation shaft 22 through the fifth insertion holes 23 C through one end and the other end of the rotation shaft 22, and are connected to the pair of first side plates 21 A of the winding portion main body 21. Adjacent to the outer surface.

The stop plate 23B has a flat plate shape. The stop plate 23B includes a stop plate main body 23G, a pair of stop pieces 23H, and a spring insertion portion 23J. The stop plate body 23G has a quadrangular shape surrounded by the first side 23K, the second side 23L, the third side 23M, and the fourth side 23N. The pair of stop pieces 23H protrude in the direction away from the first side 23K and the third side 23M to the first side 23K and the third side 23M of the stop plate main body 23G, respectively, and protrude in the direction away from the second side 23L. Is formed. The spring insertion portion 23J is provided at the center of the fourth side 23N so as to protrude in a direction away from the fourth side 23N. The stop plate 23B has a pair of stop pieces 23H inserted through the first long holes 21F of the pair of first side plates 21A of the winding portion main body 21 so as to be movable in the longitudinal direction of the first long holes 21F. Further, the stop plate 23B is inserted into the spring insertion portion 23J through a compression coil spring 23P, one end of the compression coil spring 23P is brought into contact with the fourth side 23N, and the other end of the compression coil spring 23P is connected to the winding portion main body 21. The first connecting plate 21B is in contact with one surface of the cut-and-raised portion 21G. The stop plate 23B is provided with the elastic force of the compression coil spring 23P in the direction from the first connecting shaft 21C to the rotating shaft 22. As a result, the stop plate 23B is in contact with the long side portion 23F of the protruding portion of the ratchet plate 23A at the tip of the stop piece 23H protruding in a direction away from the second side 23L of the stop plate body 23G.

The lever portion 24 has a pair of second side plates 24A, a second connecting plate 24B, and a second connecting shaft 24C. The pair of second side plates 24A has a flat plate shape and extends in one direction. These second side plates 24A have the same outer shape. These second side plates 24A face each other in parallel, and the dimension between them is a predetermined dimension. The second side plate 24A is provided with a sixth insertion hole 24D and a seventh insertion hole 24E penetrating in the thickness direction. The sixth insertion hole 24D is provided at one end of the second side plate 24A extending in one direction. The seventh insertion hole 24E is provided at the other end of the second side plate 24A extending in one direction. The second connecting plate 24B has a rectangular outer shape. The second connecting plate 24B connects two of the four sides of the quadrangular shape that are parallel to each other to a straight side that connects one end and the other end of the pair of second side plates 24A. The second connecting shaft 24C has a columnar shape, and is inserted into each of the seventh insertion holes 24E of the pair of second side plates 24A through both ends and connected to the pair of second side plates 24A.

A first arc-shaped side 24F and a second arc-shaped side 24G formed coaxially with the sixth insertion hole 24D are formed at one end of the second side plate 24A. The radius of the arc of the first arcuate side 24F is smaller than the radius of the arc of the second arcuate side 24G. The first arcuate side 24F is provided at a position away from the straight side of the second side plate 24A to which the second connecting plate 24B is connected with the sixth insertion hole 24D interposed therebetween. One end of the second arcuate side 24G is continuous with the linear side to which the second connecting plate 24B is connected. One end of the first arc-shaped side 24F and the other end of the second arc-shaped side 24G are smoothly continuous via the continuous side 24H. Further, a notch 24J is provided in the vicinity of the sixth insertion hole 24D of the second side plate 24A. The cutout portion 24J includes a straight side 24K and a convex portion 24L. The straight side 24K has one end continuous to the other end of the first arcuate side 24F and extends from the sixth insertion hole 24D toward the seventh insertion hole 24E substantially parallel to the second connecting plate 24B. The convex portion 24L is continuous with the other end of the straight side 24K and is formed to protrude in a direction away from the second connecting plate 24B. The lever portion 24 is inserted into the sixth insertion hole 24D of the pair of second side plates 24A through the one end portion and the other end portion of the rotating shaft 22 and the pair of second side plates 24A via the pair of ratchet plates 23A. The inner surface is disposed to face the outer surface of the pair of first side plates 21A. The lever portion 24 can rotate around the central axis of the rotary shaft 22 with respect to the winding portion main body 21.

The tool locking part 25 has a tool locking part body 25A and a connecting piece 25B. The tool locking portion main body 25A has a hexagonal shape and extends in one direction. The tool locking portion main body 25A is, for example, equivalent to the outer dimensions of nuts of M10 to M14. The connecting piece 25B has a flat plate shape with a rectangular outer shape. Further, an eighth insertion hole 25C is provided through the flat central portion of the connecting piece 25B. The connecting piece 25B is disposed along the hexagonal central axis on the hexagonal one side surface of the tool locking portion main body 25A, and one side of the four sides of the quadrangular shape is connected to the hexagonal one side surface. . The tool locking part 25 has a center axis of the hexagonal tool locking part body 25A coaxially with the center axis of the rotary shaft 22, and a connecting piece 25B is inserted into the slit 22A of the rotary shaft 22, and the eighth insertion hole 25C, In addition, a connecting pin (pin) 27 is inserted into the fourth insertion hole 22 C of the rotating shaft 22 and is connected to the rotating shaft 22. That is, the tool locking portion 25 is provided on the rotating shaft 22. Further, the connecting pin 27 is also inserted into the third insertion hole 22 B provided at one end of the rotating shaft 22. The connecting pin 27 inserted through the third insertion hole 22 B and the fourth insertion hole 22 C of the rotating shaft 22 protrudes outward from the outer peripheral surface of the rotating shaft 22. Thereby, the tool latching | locking part 25 and the lever part 24 do not drop from the winding part main body 21. FIG.

The connecting body 26 includes a first fixed cable 26A, a second fixed cable 26B, and a pair of locking members 26C. The first fixed rope 26A has a strip shape and extends in one direction. One end portion and the other end portion of the first fixed rope 26A are folded back, and the first fixed rope 26A is overlapped and sewn close to the central portion of the one end portion and the other end portion. Thereby, the ring 26D is formed in the one end part and other end part of 26 A of 1st fixed ropes, respectively. One end portion and the other end portion of the second fixed rope 26B are folded back and overlapped and sewn close to the central portion of the one end portion and the other end portion of the second fixed rope 26B. Thereby, the ring 26E is formed in the one end part and other end part of the 2nd fixed rope 26B, respectively. 26 A of 1st fixed ropes have penetrated the ring 26D formed in the one end part to the 1st connecting shaft 21C. The second fixed cable 26 B is inserted through the slit 22 A of the rotation shaft 22.

The pair of locking members 26C have the same shape. The locking member 26C is made of synthetic resin or the like and has flexibility. The locking member 26C includes a root portion 26F, a pair of column portions 26G, and a pair of through-hole portions 26H. The root portion 26F has a columnar shape and extends in one direction. The pair of column portions 26G oppose each other in a columnar shape, and extend from both ends of the root portion 26F at a right angle to the root portion 26F. The pair of through-hole portions 26 H are connected to the tip portions of the pair of rising portions, each having an annular shape, with the annular central axes being coaxial. The locking member 26 C has a root portion 26 F inserted through rings 26 D and 26 E formed at the other end of each of the first fixed rope 26 A and the second fixed rope 26 B. Thus, the extendable tool of Embodiment 1 is formed.

Next, the operation of the extendable tool of Embodiment 1 will be described with reference to FIGS. First, as shown in FIG. 2, the lever portion 24 is rotated around the central axis of the rotating shaft 22 so that the second connecting shaft 24 C of the lever portion 24 is closest to the first connecting shaft 21 C of the winding portion main body 21. Then, the stop piece 23H of the stop plate 23B fits into the notch portion 24J of the lever portion 24. As a result, the tip of the stop piece 23H protruding in the direction away from the second side 23L comes into contact with the long side portion 23F of the ratchet plate 23A, and the short side portion 23E comes into contact with the one side surface of the stop piece 23H. The movement of the stop plate 23B in the direction in which the first long hole 21F extends is limited. As a result, the pair of ratchet plates 23A and the rotation shaft 22 are stopped so that the rotation is limited by the stop plate 23B. That is, the stop plate 23 B of the stop unit 23 stops the rotation of the rotary shaft 22.

Next, as shown in FIG. 3, the lever portion 24 is rotated around the central axis of the rotating shaft 22, and the second connecting shaft 24 C of the lever portion 24 is slightly moved from the first connecting shaft 21 C of the winding portion main body 21. If it releases | separates, the stop piece 23H of the stop plate 23B will remove | deviate from the notch part 24J of the lever part 24. FIG. As a result, the stop plate 23B can freely move in the direction in which the first long hole 21F extends. That is, the pair of ratchet plates 23A and the rotating shaft 22 are restricted from rotating in the direction in which the short side 23E is pressed against the surface on one side of the stop piece 23H (hereinafter referred to as the arrow B direction). The rotation in the direction in which the short side portion 23E is separated from the surface on one side of the piece 23H (hereinafter referred to as arrow A direction) is not limited. That is, the pair of ratchet plates 23 A and the rotation shaft 22 are in a semi-stop state in which the rotation in one direction is released. Further, since the short side portion 23E of the protrusion 23D of the ratchet plate 23A is provided on the outer periphery of the ratchet plate 23A at a predetermined angle, the short side portion 23E of the protrusion 23D is provided on one side of the stop piece 23H of the stop portion 23. The rotating shaft 22 is stopped at every predetermined angle each time it contacts the surface.

Next, as shown in FIG. 4, the lever portion 24 is rotated around the central axis of the rotating shaft 22, and the second connecting shaft 24 C of the lever portion 24 is sandwiched between the rotating shaft 22 and the first portion of the winding portion main body 21. Separated from the connecting shaft 21C. Then, the arc-shaped side of the second arc-shaped side 24G comes into contact with the tip of the stop piece 23H of the stop plate 23B, and the stop plate 23B moves in a direction away from the long side portion 23F of the protrusion 23D of the pair of ratchet plates 23A. To do. Then, the short side portion 23E of the protruding portion 23D that is in contact with the surface on one side of the stop piece 23H is separated from the stop piece 23H. Thereby, a pair of ratchet board 23A and the rotating shaft 22 are not restrict | limited to the arrow A direction and the arrow B direction. In other words, the pair of ratchet plates 23A and the rotation shaft 22 are brought into a stop release state in which the rotation in one direction and the other direction is released.

Next, the expansion / contraction object that expands and contracts using the expansion / contraction tool of Embodiment 1 will be described.

As shown in FIGS. 5 to 7, the overturn prevention device 9 that is an expansion / contraction object includes a damper 10 that is a damper portion and a pair of

base portions

30A and 30B. Here, the fall prevention device 9 is attached between the upper surface 1U of the furniture G and the ceiling M, and when the furniture G shakes due to vibration such as an earthquake, the furniture G is prevented from shaking and the furniture G is toppled. It is to prevent. Further, the fall prevention device 9 is not limited to the furniture G, but includes a bookcase, a refrigerator, a showcase, a server rack, a bed in which a plurality of beds are connected in the vertical direction, and a large television (television). It can be attached to things that may fall over due to shaking such as an earthquake.

The damper 10 includes a cylinder 11, a rod guide (not shown), a piston (not shown), a rod 13, and two joints 15 provided at both ends. ing. The cylinder 11 has a bottomed cylindrical shape. The rod guide seals the opening of the cylinder 11. The piston is slidably inserted into the cylinder 11. The rod 13 has a base end connected to the piston. Further, the rod 13 is inserted through the rod guide, and the tip side protrudes to the outside of the cylinder 11. The cylinder 11 encloses hydraulic oil and compressed gas (gas). Each joint portion 15 is formed by bending a flat metal fitting. Each joint portion 15 is connected to the bottom portion 11B of the cylinder 11 and the tip portion 13A of the rod 13. Each joint portion 15 is formed with a through hole 15A penetrating in a direction perpendicular to the axis of the damper 10 (see FIG. 6).

The damper 10 is a pressure damper in which the damping force generated during the contraction operation is larger than the damping force generated during the extension operation. Here, the extension operation of the damper 10 means an operation in which the length of the rod 13 protruding from the cylinder 11 becomes longer. Further, the contraction operation of the damper 10 means an operation in which the length of the rod 13 protruding from the cylinder 11 becomes shorter. In the damper 10, the pressure of the compressed gas sealed in the cylinder 11 works in the extending direction. That is, the damper 10 generates a biasing force in the extending direction.

The mechanism (mechanism) in which the damping force of the damper 10 is generated is a well-known structure, and will not be described. The cylinder 11 is partitioned into a rod-side pressure chamber in which the base end portion of the rod 13 is housed and an anti-rod-side pressure chamber by a piston inside. The piston is formed with an orifice which is a throttle valve for communicating between the two pressure chambers. The orifice functions as a damping force generator that generates a damping force by applying resistance to the flow of hydraulic oil between the rod-side pressure chamber and the non-rod-side pressure chamber accompanying the expansion / contraction operation of the damper 10. Further, the piston is formed with a communication passage that communicates between the pressure chambers via a check valve. The check valve allows the flow of hydraulic oil from the rod side pressure chamber to the anti rod side pressure chamber, and prevents the reverse flow. For this reason, when the damper 10 is extended, the flow path of the hydraulic oil from the rod-side pressure chamber to the anti-rod-side pressure chamber becomes a path between the orifice and the communication path. On the other hand, in the damper 10, during the contracting operation, the flow path of the hydraulic oil from the non-rod side pressure chamber to the rod side pressure chamber is only the orifice. For this reason, the damping force generated during the extension operation of the damper 10 is smaller than the damping force generated during the contraction operation.

The pair of base portions 30 A and 30 B is a first base portion 30 A connecting the joint portion 15 connected to the bottom portion 11 B of the cylinder 11, and a second base portion connecting the joint portion 15 connected to the tip end portion 13 A of the rod 13. This is the base portion 30B. The first base portion 30A is placed in contact with the upper surface 1U of the furniture G, and the second base portion 30B is in contact with the ceiling M (see FIG. 7). The first base portion 30A and the second base portion 30B have the same form and structure. Each

base part

30A, 30B has the base part main body 31, the volt | bolt 45, the nut 47, and the slip prevention part 37 (refer FIG. 6). In each of the

base portions

30A and 30B, a bolt 45 is inserted into the through hole 15A of the joint portion 15 of the damper 10, and a nut 47 is screwed into the bolt 45 (see FIG. 6). Alternatively, a cylindrical pin may be used instead of the bolt 45, and a push nut may be used instead of the nut 47. Specifically, a cylindrical pin is inserted into the through hole 15A of the joint portion 15 of the damper 10, and a push nut is attached to each of both ends of the cylindrical pin (not shown). Each of the

base portions

30A and 30B is rotatable with respect to the shaft portion 45B of the bolt 45. That is, each of the

base portions

30A and 30B couples both end portions of the damper 10 so as to be rotatable around the rotation axis. Thus, the

base portions

30A and 30B are provided at both ends of the damper 10 in the extending direction.

In a plan view of the first base portion 30A as viewed from above with the first base portion 30A in contact with the upper surface 1U of the furniture G, the base portion main body 31 has a rectangular shape. Further, the base portion main body 31 has a lower end edge parallel to the upper surface 1U of the furniture G in a side view when the first base portion 30A is viewed in a direction in which the short side extends in a state of being placed in contact with the upper surface 1U of the furniture G. The upper end edge has an arc shape that swells upward from both sides of the lower end edge (see FIGS. 5 and 7). Further, in a side view of the first base portion 30A in the direction in which the long side extends in a state where the first base portion 30A is placed in contact with the upper surface 1U of the furniture G, the size of the upper end edge of the base portion main body 31 is larger than the lower end edge. It is short and substantially trapezoidal (see FIG. 6).

The non-slip portion 37 has a similar (rectangular) outer shape that is slightly larger than the outer shape of the base body 31. The non-slip portion 37 is made of rubber. Further, the anti-slip portion 37 is attached to the lower end surface of the base portion main body 31 in the first base portion 30A in a state of being placed in contact with the upper surface 1U of the furniture G. Moreover, the anti-slip | skid part 37 has comprised flat form. Thus, the overturn prevention device 9 is formed.

Next, a mounting method for mounting the fall prevention device 9 between the upper surface 1U of the furniture G installed on the installation surface and the ceiling M using the extendable tool of the first embodiment will be described.

First, as shown in FIG. 7, the through hole 26H of the locking member 26C provided in the first fixed line 26A is fitted to the head 45A of the bolt 45 provided in the second base portion 30B and the nut 47. And lock. Then, the through hole portion 26H of the locking member 26C provided in the second fixed line 26B is fitted and locked to the head portion 45A of the bolt 45 provided in the first base portion 30A and the nut 47. Note that the size of the through-hole portion 26H of the locking member 26C is formed in accordance with the sizes of the outer diameters of the head portion 45A of the bolt 45 and the nut 47. Moreover, when it is the structure which replaces the volt | bolt 45 as a cylindrical pin and replaces the nut 47 with a push nut, the size of the through-hole portion 26H of the locking member 26C is the size of both ends of the cylindrical pin. It is formed according to the thickness. That is, the connecting body 26 is detachably connected to each of both end portions of the overturn prevention device 9 that is extendable and repelled in the extending direction. Then, the ring 26E at one end of the second fixed rope 26B inserted through the slit 22A of the rotary shaft 22 is pulled in a direction away from the slit 22A. Thereby, the dimension between the pair of locking members 26C of the coupling body 26 is approximately matched with the dimension between the heads 45A of the respective bolts 45 of the

base portions

30A and 30B of the overturn prevention device 9.

Next, as shown in FIG. 3, the extendable tool is in a semi-stopped state, and the ratchet 50 is inserted into the tool locking portion main body 25 A of the tool locking portion 25. At this time, the rotation direction switching lever 50A of the ratchet 50 is operated to switch the rotation shaft 22 so that the rotation shaft 22 rotates in the direction of the arrow A. Then, the ratchet 50 is reciprocated around the central axis of the rotary shaft 22 and rotated. Then, the pair of ratchet plates 23A and the rotating shaft 22 rotate in the direction of arrow A, and the rotating shaft 22 winds up the second fixed rope 26B. That is, the tool locking portion 25 locks the ratchet 50 that rotates the rotating shaft 22. Then, the ratchet 50 is rotated in the arrow B direction. Then, the portion of the ratchet 50 that is locked to the tool locking portion main body 25A, the pair of ratchet plates 23A, and the rotating shaft 22 do not rotate, and only the handle 50B of the ratchet 50 rotates in the arrow B direction. .

Thus, by repeating the above operation, the second fixed cable 26B is wound around the rotary shaft 22, the overturn prevention device 9 is contracted, and the total length of the overturn prevention device 9 is attached to the ceiling M and the furniture. The length is suitable for the dimension between the upper surface 1U of G. Here, the total length of the fall prevention device 9 is a pair of bases when the flat surfaces of the anti-slip portions 37 of the pair of base portions 30 A and 30 B are oriented in a direction perpendicular to the central axis of the damper 10. It is the dimension L1 between each anti-slip | skid part 37 of

part

30A, 30B (refer FIG. 5).

Next, the anti-slip portion 37 of the first base portion 30A is placed in contact with the upper surface 1U of the furniture G on the wall surface W side. Specifically, the anti-slip portion 37 of the first base portion 30A is brought into contact with the wall surface W side of the upper surface 1U of the furniture G. Then, the second base portion 30B is arranged farther from the wall surface W side than the first base portion 30A (see FIG. 7).

Next, set the extendable tool to the stop release state. At this time, the elastic tool generates a frictional force by rubbing the surfaces of the second fixed rope 26 B wound around the rotary shaft 22. Since this frictional force acts as a resistance force in a direction opposite to the repulsive force in the extension direction of the overturn prevention device 9, the overturn prevention device 9 does not extend carelessly. Further, a frictional force is also generated between the outer peripheral surface of the rotating shaft 22 and the first insertion hole 21D of the pair of first side plates 21A of the winding part main body 21 and the sixth insertion hole 24D of the lever part 24. This frictional force also acts in a direction opposite to the repulsive force in the extending direction of the overturn prevention device 9. That is, when the connecting body 26 wound around the rotary shaft 22 is drawn out from the rotary shaft 22 by the repulsive force applied in the extending direction, the expansion / contraction tool generates a resistance force that opposes the repulsive force.

Then, the rotation direction switching lever 50A of the ratchet 50 is operated to switch the rotation shaft 22 so as to rotate in the direction of the arrow B. Then, the ratchet 50 is reciprocated around the central axis of the rotating shaft 22. Then, the pair of ratchet plates 23 A and the rotation shaft 22 rotate in the direction of arrow B, and the second fixed rope 26 B is paid out from the rotation shaft 22. Then, the ratchet 50 is rotated in the arrow A direction. Then, the portion of the ratchet 50 that is locked to the tool locking portion main body 25A, the pair of ratchet plates 23A, and the rotating shaft 22 do not rotate, and only the handle 50B of the ratchet 50 rotates in the arrow A direction.

Thus, by repeating the above operation, the second fixed rope 26B is fed out from the rotating shaft 22. Then, the fall prevention device 9 extends and the second base portion 30B comes into contact with a desired position on the ceiling M. Then, the above-described operation is repeated until the second fixed cable 26B and the first fixed cable 26A that have been extended are loosened. Then, the through hole 26H of the locking member 26C is removed from the head 45A and the nut 47 of each bolt 45 of the second base portion 30B and the first base portion 30A. Thus, the fall prevention device 9 can be mounted between the upper surface 1U of the furniture G installed on the installation surface and the ceiling M by using this extendable tool. At this time, it is desirable that the inclination angle of the damper 10 of the fall prevention device 9 is an angle between 15 ° and 25 ° with respect to the vertical direction. Thereby, the fall prevention apparatus 9 can suppress the furniture G's shaking favorably, and can prevent the furniture G from falling down favorably.

In addition, when removing the fall prevention device 9 mounted between the upper surface 1U of the furniture G and the ceiling M, the head 45A of each bolt 45 and the nut 47 of the second base portion 30B and the first base portion 30A. Then, the through hole 26H of the locking member 26C is fitted again to attach the extendable tool. And the 2nd fixed rope 26B is wound around the rotating shaft 22, and the fall prevention apparatus 9 is contracted. Thereby, since the 2nd base part 30B leaves | separates easily from the ceiling M with dead weight of the fall prevention apparatus 9, the fall prevention apparatus 9 can be removed from between the upper surface 1U of the furniture G, and the ceiling M. FIG.

Thus, the retractable tool is telescopic and falls by winding the connecting body 26 detachably connected to both end portions of the overturn preventing device 9 to which a repulsive force is applied in the extending direction by the winding portion 20. The prevention device 9 can be expanded and contracted. Furthermore, this expansion / contraction tool can stop by the stop part 23 that the connection body 26 wound up by the rotating shaft 22 of the winding part 20 is pulled out from the rotating shaft 22 by the repulsive force in the extension direction of the expansion / contraction object. When the stop by the portion 23 is released, the connecting body 26 can be extended from the rotating shaft 22. Moreover, this expansion-contraction tool can rotate the rotating shaft 22 with the ratchet 50 latched by the tool latching | locking part main body 25A of the tool latching | locking part 25 provided in the rotating shaft 22. FIG. Thereby, this expansion-contraction tool can expand-contract the fall prevention apparatus 9 easily.

Therefore, the extendable tool of Embodiment 1 is easy to use.

Moreover, this stop part 23 stops the rotating shaft 22 for every predetermined angle. For this reason, since this extension tool can make the dimension which winds up the coupling body 26 into a predetermined dimension, the dimension which the fall prevention apparatus 9 contracts can be adjusted for every predetermined dimension. Thereby, this expansion-contraction tool can shrink | contract these fall prevention devices 9 to a predetermined dimension easily, for example, when shrinking several fall prevention devices 9 with the same attachment length or different.

Further, when the connecting body 26 wound around the rotary shaft 22 is drawn out by the repulsive force applied in the extending direction, the expansion / contraction tool generates a frictional force that opposes the repulsive force. For this reason, even if this expansion-contraction tool is a case where rotation of the rotating shaft 22 by which the coupling body 26 was wound up is not stopped by the stop part 23, the coupling body 26 is by the repulsive force of the fall prevention apparatus 9 in the expansion | extension direction. Can be suppressed by the frictional force. Thereby, this expansion-contraction tool can suppress that the contracting fall prevention apparatus 9 expands carelessly.

<Embodiment 2>
The extendable tool of the second embodiment is different from the first embodiment in the configuration of the winding unit 120, the configuration of the tool locking unit 125, and the configuration of the coupling body 126. Further, parts having the same configuration as in the first embodiment are denoted by the same reference numerals as those in the first embodiment, and detailed description thereof is omitted.

The extensible tool of Embodiment 2 includes a winding unit 120, a tool locking unit 125, and a connecting body 126 as shown in FIG.

The winding unit 120 includes a winding unit main body 121, a rotating shaft 122, a lid unit 128, and a stop unit 123. The winding portion main body 121 has a cylindrical shape and extends in one direction, and one end thereof is closed by a flat closing portion 121H. A ninth insertion hole 121J penetrating in the thickness direction is provided at the center of the flat closing portion 121H. The cylindrical winding part main body 121 is provided with a pair of second long holes 121K extending in parallel to the central axis direction. These second long holes 121K are opposed to each other with a cylindrical central axis interposed therebetween. In addition, a grip portion 121 L is provided on the outer peripheral surface of the winding unit main body 121. The grip portion 121 L extends in one direction in a columnar shape, and is connected to the outer peripheral surface of the winding portion main body 121 so as to be orthogonal to the central axis of the winding portion main body 121. A cylindrical grip 121M is inserted through the grip 121L. The grip 121M is made of synthetic resin, rubber, or the like. The grip portion 121L is to be gripped by the operator when the rotating shaft 122 of the winding portion 120 is rotated to wind the connecting body 126.

The rotating shaft 122 has a pair of fixing members 122D and a pair of winding members 122E. Each of the pair of fixing members 122D has a disk shape and faces each other in parallel. Each of the fixing members 122D is provided with a cylindrical shaft portion 122F coaxially with the disc-shaped central axis. These shaft portions 122F extend toward the outside of the fixing members 122D that face each other in parallel. Further, a tool locking portion main body 25A, which is a tool locking portion 125, is connected to the tip end portion of the one shaft portion 122F. The tool locking portion main body 25A has a hexagonal shape and extends in one direction. The tool locking portion main body 25A is, for example, equivalent to the outer dimensions of nuts M10 to M14. The pair of winding members 122E extend in one direction with a cross-sectional shape in a perpendicular direction forming a semicircular shape formed by a straight portion 122G and an arc portion 122H. The winding member 122E is disposed between the pair of opposing fixing members 122D, and connects the opposing surfaces of the pair of fixing members 122D to the fixing member 122D. The pair of winding members 122E face each other's linear portions 122G, and provide a gap 122J between the linear portions 122G. The rotary shaft 122 is disposed by inserting a shaft portion 122F in which the tool locking portion main body 25A is connected to the ninth insertion hole 121J of the closing portion 121H of the winding portion main body 121.

The lid portion 128 has a disk shape and is provided with a tenth insertion hole 128A penetrating in the thickness direction in the center. The lid portion 128 is inserted through the tenth insertion hole 128A into the shaft portion 122F of the rotating shaft 122 to which the tool locking portion main body 25A is not connected, and closes the other open end of the winding portion main body 121, thereby winding the winding portion. The main body 121 is detachably connected.

The stop portion 123 includes a contact plate 123A, a base portion 123B, and a presser portion 123C. The contact plate 123A has a disk shape, and an eleventh insertion hole 123H is provided in the center thereof in the thickness direction. The contact plate 123A is connected to the shaft portion 122F by inserting the eleventh insertion hole 123H through the shaft portion 122F protruding from the tenth insertion hole 128A of the lid portion 128.

The base portion 123 B has a quadrangular prism shape and extends in one direction, and is connected to the outer peripheral surface of the winding portion main body 121 so as to be orthogonal to the central axis of the winding portion main body 121. In addition, a twelfth insertion hole 123J is provided through the middle portion of the base portion 123B in the longitudinal direction at a right angle to the longitudinal direction of the base portion 123B and at a right angle to the central axis of the winding portion main body 121. A first protrusion 123K is provided at the tip of the base 123B. The first protrusion 123K protrudes in the same direction as the direction in which the shaft portion 122F of the rotating shaft 122 protrudes from the tenth insertion hole 128A of the lid portion 128.

The pressing portion 123C includes a pressing portion main body 123D, a friction member 123E, a second protrusion 123F, and a pair of first connecting portions 123G. The presser part main body 123D has a quadrangular prism shape and extends in one direction. The friction member 123E is provided so as to protrude from one end portion in the longitudinal direction of one side surface of the four quadrangular columnar side surfaces of the presser portion main body 123D. The friction member 123E is made of synthetic resin, rubber, or the like. The second protrusion 123F is provided so as to protrude from the side surface at the center portion in the longitudinal direction of the side surface of the presser portion main body 123D provided with the friction member 123E.

The pair of first connecting portions 123G are formed in a flat plate shape and face each other, and are positioned between the friction member 123E and the second projection portion 123F, from the side surface where the friction member 123E and the second projection portion 123F are provided. Each is provided protruding. A thirteenth insertion hole 123L is provided in each of the tip end portions of the first connection portion 123G in the thickness direction. These thirteenth insertion holes 123L are coaxial with each other. The holding part 123C has the base 123B sandwiched between the pair of first connecting parts 123G, and communicates the thirteenth insertion hole 123L and the twelfth insertion hole 123J. The holding portion 123C is connected to the base portion 123B so as to be rotatable about the central axis of the connection pin 123M through the connection pin 123M through the thirteenth insertion hole 123L and the twelfth insertion hole 123J. A compression coil spring 123N is inserted through the second protrusion 123F of the presser body 123D and the first protrusion 123K of the base 123B. The compression coil spring 123N generates a repulsive force in a direction in which the second protrusion 123F of the presser body 123D is separated from the first protrusion 123K of the base 123B. Thereby, the friction member 123E of the pressing portion 123C is pressed against one surface of the contact plate 123A.

The connecting body 126 includes a first fixed cable 26A and a pair of locking members 26C. The first fixed rope 26A has a strip shape and extends in one direction. One end portion and the other end portion of the first fixed rope 26A are folded back, and the first fixed rope 26A is overlapped and sewn close to the central portion of the one end portion and the other end portion. Thereby, the ring 26D is formed in the one end part and other end part of 26 A of 1st fixed ropes, respectively. The first fixed rope 26A is inserted through the gap 122J formed between the second elongated hole 121K of the winding portion main body 121 and the pair of winding members 122E of the rotating shaft 122 at the intermediate portion in the longitudinal direction. The pair of locking members 26C are inserted through the root portion 26F through the ring 26D of the first fixed rope 26A. In this way, the extendable tool of Embodiment 2 is formed.

Next, the operation of the extendable tool according to the second embodiment will be described. The compression coil spring 123N provided through both ends of the second protrusion 123F of the presser body 123D and the first protrusion 123K of the base 123B is repulsive in the direction in which the second protrusion 123F is separated from the first protrusion 123K. Is occurring. Thereby, the friction member 123E of the pressing portion 123C is pressed against one surface of the contact plate 123A. At this time, even if the contact plate 123A tries to rotate, the friction member 123E of the presser portion 123C is pressed against one surface of the contact plate 123A, so that the contact plate 123A and the friction member 123E of the presser portion 123C A friction force is generated between them. Thereby, it will be in the stop state in which rotation of contact plate 123A and rotation axis 122 is restricted.

Next, the other end portion of the presser portion 123C is brought close to the base portion 123B. Then, the friction member 123E moves away from the contact plate 123A. As a result, the contact plate 123A, whose rotation is limited by the friction member 123E, and the stop release state in which the rotation in one direction and the other direction of the rotation shaft 122 are released are released.

Next, a mounting method for mounting the fall prevention device 9 between the upper surface 1U of the furniture G installed on the installation surface and the ceiling M using the extendable tool of the second embodiment will be described. In the second embodiment, the direction in which the first fixed rope 26A is wound around the rotary shaft 122 will be described as an arrow C direction, and the direction in which the first fixed rope 26A is unwound from the rotary shaft 122 will be described as an arrow D direction.

First, the through hole portion 26H of one locking member 26C is fitted and locked to the head portion 45A of the bolt 45 provided in the second base portion 30B and the nut 47. Then, the through-hole portion 26H of the other locking member 26C is fitted and locked to the head portion 45A of the bolt 45 provided in the first base portion 30A and the nut 47 (see FIG. 7).

Next, the ratchet 50 is inserted into the tool locking part body 25A. At this time, the rotation direction switching lever 50A of the ratchet 50 is operated to switch the rotation shaft 122 to rotate in the direction of rotating in the arrow C direction. Then, the ratchet 50 is reciprocated and rotated around the central axis of the rotation shaft 122, and the first fixed rope 26 A is wound around the rotation shaft 122. Then, the gripping portion 121L is gripped to bring the friction member 123E into a stop release state in which it is separated from the contact plate 123A. Then, the ratchet 50 is rotated in the direction of arrow C, the contact plate 123A and the rotation shaft 122 are rotated, and the first fixed cable 26A is wound around the rotation shaft 122. Then, the friction member 123E is stopped and pressed against one surface of the contact plate 123A, and the ratchet 50 is rotated in the arrow D direction. Then, the portion of the ratchet 50 that is locked to the tool locking portion main body 25A, the contact plate 123A, and the rotating shaft 122 do not rotate, and only the handle 50B of the ratchet 50 rotates in the arrow D direction.

Thus, by repeating the above operation, the first fixed cable 26A is wound around the rotary shaft 122, the overturn prevention device 9 is contracted, and the ceiling M and the furniture for attaching the overturn prevention device 9 to the entire length of the overturn prevention device 9 are installed. The length is suitable for the dimension between the upper surface 1U of G. Then, the non-slip portion 37 of the first base portion 30A is brought into contact with the wall surface W side of the upper surface 1U of the furniture G. Then, the second base portion 30B is arranged farther from the wall surface W side than the first base portion 30A (see FIG. 7). At this time, the elastic tool generates frictional force by rubbing the surfaces of the first fixed rope 26 A wound around the rotary shaft 122. Since this frictional force acts in the direction opposite to the repulsive force in the extension direction of the overturn prevention device 9, the overturn prevention device 9 will not inadvertently extend. Further, a frictional force is also generated between the outer peripheral surface of the shaft portion 122F of the rotating shaft 122, the ninth insertion hole 121J of the closing portion 121H of the winding portion main body 121, and the tenth insertion hole 128A of the lid portion 128. This frictional force also acts in a direction opposite to the repulsive force in the extending direction of the overturn prevention device 9.

Then, the rotation direction switching lever 50A of the ratchet 50 is operated to switch the rotation shaft 122 so as to rotate in the direction of the arrow D. Then, the ratchet 50 is reciprocated and rotated around the central axis of the rotating shaft 122, and the first fixed rope 26 A is fed out from the rotating shaft 122. At this time, the grip 121L is gripped, the friction member 123E is released from the contact plate 123A, and the ratchet 50 is rotated in the arrow D direction to rotate the contact plate 123A and the rotating shaft 122. The first fixed rope 26A is fed out from the rotary shaft 122. Then, the ratchet 50 is rotated in the direction of arrow C in a stopped state in which the friction member 123E is pressed against one surface of the contact plate 123A. Then, the portion of the ratchet 50 that is locked to the tool locking portion body 25A, the contact plate 123A, and the rotating shaft 122 do not rotate, and only the handle 50B of the ratchet 50 rotates in the direction of arrow C.

Thus, by repeating the above operation, the first fixed rope 26A is fed out from the rotating shaft 122. Then, the fall prevention device 9 extends and the second base comes into contact with a desired position of the ceiling M. Then, the above-described operation is repeated until the first fixed cable 26A that has been drawn loosens. Then, the through holes 26H of the locking members 26C fitted to the bolts 45 of the second base portion 30B and the bolts 45 of the first base portion 30A and the nuts 47 are removed. In this way, the fall prevention device 9 can be mounted between the upper surface 1U of the furniture G installed on the installation surface and the ceiling M using the extendable tool of the second embodiment. In the extension tool of the second embodiment, the direction in which the first fixed rope 26A is wound around the rotary shaft 122 may be the arrow D direction, and the direction in which the first fixed rope 26A is unwound from the rotary shaft 122 may be used as the arrow C direction. .

As described above, the retractable tool of the second embodiment is telescopic, and the winding unit 120 winds up the connecting body 126 that is detachably coupled to both ends of the overturn prevention device 9 to which a repulsive force is applied in the extending direction. Thus, the fall prevention device 9 can be expanded and contracted. Furthermore, this expansion / contraction tool can stop by the stop part 123 that the connection body 126 wound up by the rotating shaft 122 of the winding part 120 is pulled out from the rotating shaft 122 by the repulsive force of the expansion / contraction object in the extending direction. When the stop by the portion 123 is released, the connecting body 126 can be unwound from the rotating shaft 122. Moreover, this expansion-contraction tool can rotate the rotating shaft 122 with the ratchet 50 latched by the tool latching | locking part main body 25A provided in the rotating shaft 122. FIG. Thereby, this expansion-contraction tool can expand-contract the fall prevention apparatus 9 easily.

Therefore, the extendable tool of Embodiment 2 is also easy to use.

Also, the winding unit 120 has a gripping part 121L that grips when the rotating shaft 122 is rotated to wind up the coupling body 126. For this reason, this extendable tool can grip the holding part 121L, rotate the rotating shaft 122 by rotating the tool locked to the tool locking part 125, and wind up the coupling body 126. In other words, this telescopic tool can facilitate the work of winding up the coupling body 126 by gripping the grip portion 121L.

<Embodiment 3>
The extendable tool of the third embodiment is different from the first or second embodiment in the configuration of the contact plate 223A and the presser 223C of the stop 223 of the winding unit 220. Further, parts having the same configuration as in the first and second embodiments are denoted by the same reference numerals as those in the first and second embodiments, and detailed description thereof is omitted.

As shown in FIG. 9, a plurality of fourteenth insertion holes 223 D are provided in the peripheral portion of the contact plate 223 A of the stop portion 223 so as to be arranged in a line in the circumferential direction at equal intervals and penetrate in the plate thickness direction. Further, a third protrusion 223B is provided so as to protrude from one end in the longitudinal direction of one of the four rectangular column-shaped side surfaces of the presser body 123D of the presser 223C of the stop 223.

The repulsive force of the compression coil spring 123N provided through both ends of the second protrusion 123F of the presser body 123D and the first protrusion 123K of the base 123B causes the second protrusion 123F of the presser body 123D to be the base 123B. Is provided in a direction away from the first protrusion 123K. Accordingly, the third protrusion 223B is inserted into the fourteenth insertion hole 223D of the contact plate 223A.

Next, the operation of the extendable tool of Embodiment 3 will be described. The compression coil spring 123N provided through both ends of the second protrusion 123F of the presser body 123D and the first protrusion 123K of the base 123B is repulsive in the direction in which the second protrusion 123F is separated from the first protrusion 123K. Is occurring. As a result, the third protrusion 223B of the pressing portion is inserted into the fourteenth insertion hole 223D of the contact plate 223A. At this time, even if the contact plate 223A tries to rotate, the third protrusion 223B of the pressing portion is inserted into the fourteenth insertion hole 223D of the contact plate 223A, so that the rotation of the contact plate 223A is limited. Thereby, the rotation of the contact plate 223A and the rotation shaft 122 is stopped by the third protrusion 223B of the presser body 123D.

Next, the other end portion of the presser portion 223C is brought close to the base portion 123B. Then, the third protrusion 223B is detached from the fourteenth insertion hole 223D of the contact plate 223A. Thereby, the contact plate 223A whose rotation is limited by the third protrusion 223B and the stop release state in which the rotation in one direction and the other direction of the rotation shaft 122 are released are entered.

Next, a mounting method for mounting the fall prevention device 9 between the upper surface 1U of the furniture G installed on the installation surface and the ceiling M using the extendable tool of the third embodiment will be described. In the third embodiment, the direction in which the first fixed cable 26A is wound around the rotary shaft 122 is referred to as an arrow E direction, and the direction in which the first fixed cable 26A is fed from the rotary shaft 122 is described as an arrow F direction.

Next, the ratchet 50 is inserted into the tool locking part body 25A. At this time, the rotation direction switching lever 50A of the ratchet 50 is operated to switch the rotation shaft 122 so as to rotate in the direction of the arrow E. Then, the ratchet 50 is reciprocated and rotated around the central axis of the rotation shaft 122, and the first fixed rope 26 A is wound around the rotation shaft 122. Then, the gripping part 121L is gripped, and the third projecting part 223B is brought into a stop release state in which it is removed from the fourteenth insertion hole 223D of the contact plate 223A. Then, the ratchet 50 is rotated in the direction of arrow E, the contact plate 223A and the rotating shaft 122 are rotated, and the first fixed rope 26A is wound around the rotating shaft 122. Then, the ratchet 50 is rotated in the direction of arrow F with the third protrusion 223B in a stopped state inserted through the fourteenth insertion hole 223D of the contact plate 223A. Then, the portion of the ratchet 50 that is locked to the tool locking portion body 25A, the contact plate 223A, and the rotating shaft 122 do not rotate, and only the handle 50B of the ratchet 50 rotates in the direction of arrow F.

Thus, by repeating the above operation, the first fixed cable 26A is wound around the rotary shaft 122, the overturn prevention device 9 is contracted, and the ceiling M and the furniture for attaching the overturn prevention device 9 to the entire length of the overturn prevention device 9 are installed. The length is suitable for the dimension between the upper surface 1U of G. Then, the non-slip portion 37 of the first base portion 30A is brought into contact with the wall surface W side of the upper surface 1U of the furniture G. Then, the second base portion 30B is arranged farther from the wall surface W side than the first base portion 30A (see FIG. 7).

Then, the rotation direction switching lever 50A of the ratchet 50 is operated to switch the rotation shaft 122 to rotate in the direction of the arrow F. Then, the ratchet 50 is reciprocated and rotated around the central axis of the rotating shaft 122, and the first fixed rope 26 A is fed out from the rotating shaft 122. At this time, the holding part 121L is gripped, and the third projecting part 223B is brought into a stop release state in which it is removed from the fourteenth insertion hole 223D of the contact plate 223A. Then, the ratchet 50 is rotated in the direction of arrow F to rotate the rotary shaft 122 and the contact plate 223A, and the first fixed rope 26A is fed out of the rotary shaft 122. Then, the ratchet 50 is rotated in the direction of arrow E with the third protrusion 223B in a stopped state inserted through the fourteenth insertion hole 223D of the contact plate 223A. Then, the portion of the ratchet 50 that is locked to the tool locking portion body 25A, the contact plate 223A, and the rotating shaft 122 do not rotate, and only the handle 50B of the ratchet 50 rotates in the direction of arrow E.

Thus, by repeating the above operation, the first fixed rope 26A is fed out from the rotating shaft 122. Then, the fall prevention device 9 extends and the second base comes into contact with a desired position of the ceiling M. Then, the above-described operation is repeated until the first fixed cable 26A that has been drawn loosens. Then, the through holes 26H of the locking members 26C fitted to the bolts 45 of the second base portion 30B and the bolts 45 of the first base portion 30A and the nuts 47 are removed. In this way, the fall prevention device 9 can be mounted between the upper surface 1U of the furniture G installed on the installation surface and the ceiling M using the extendable tool of the second embodiment. In the extension tool of the third embodiment, the direction in which the first fixed line 26A is wound around the rotation shaft 122 may be used as the arrow F direction, and the direction in which the first fixed line 26A is unwound from the rotation shaft 122 may be used as the arrow E direction. .

As described above, the retractable tool of the third embodiment is telescopic, and the winding unit 220 winds up the connecting body 126 that is detachably coupled to both ends of the fall prevention device 9 to which a repulsive force is applied in the extending direction. Thus, the fall prevention device 9 can be expanded and contracted. Further, the expansion / contraction tool can be stopped by the stop portion 223 so that the connecting body 126 wound around the rotation shaft 122 of the winding portion 220 can be pulled out from the rotation shaft 122 by the repulsive force in the extension direction of the expansion / contraction object. When the stop by the portion 223 is released, the coupling body 126 can be unwound from the rotating shaft 122. Moreover, this expansion-contraction tool can rotate the rotating shaft 122 with the ratchet 50 latched by the tool latching | locking part main body 25A provided in the rotating shaft 122. FIG. Thereby, this expansion-contraction tool can expand-contract the fall prevention apparatus 9 easily.

Therefore, the extendable tool of Embodiment 3 is also easy to use.

<Embodiment 4>
The extendable tool of the fourth embodiment is different from the first to third embodiments in the configuration of the stop portion 323 of the winding unit 320. Further, parts having the same configurations as those of the first to third embodiments are denoted by the same reference numerals as those of the first to third embodiments, and detailed description thereof is omitted.

As shown in FIG. 10, a plurality of fourth protrusions 323U are provided on the outer periphery of the contact plate 323A of the stop portion 323 so as to protrude in the radial direction of the disk-shaped contact plate 323A arranged at equal intervals in the circumferential direction. ing. The base 323B includes a first base 323T and a second base 323D. The first base portion 323T has a quadrangular prism shape and extends in one direction, and is connected to the outer peripheral surface of the winding portion main body 121 so as to be orthogonal to the central axis of the winding portion main body 121. In addition, a twelfth insertion hole 123J is provided in the middle portion of the first base portion 323T in the longitudinal direction so as to be perpendicular to the longitudinal direction of the first base portion 323T and perpendicular to the central axis of the winding portion main body 121. . The second base portion 323D is provided at the distal end portion of the first base portion 323T so as to extend in a direction in which the shaft portion 122F of the rotating shaft 122 protrudes from the tenth insertion hole 128A of the lid portion 128. A first protrusion 123 K is provided at the distal end of the second base 323 D so as to protrude toward the central axis of the winding unit main body 121.

The pressing portion 323C includes a pressing portion main body 323G, a second protrusion 123F, and a stopper member 323H. The presser body 323G includes a first presser body 323J and a second presser body 323K. The first presser portion main body 323J has a quadrangular prism shape and extends in one direction. The second presser portion main body 323K has a quadrangular prism shape, and is perpendicular to the first presser portion main body 323J from one end in the longitudinal direction of one of the four side faces of the first presser portion main body 323J. It is stretched. The second protrusion 123F is provided so as to protrude in the direction in which the first presser body 323J extends from the central portion in the longitudinal direction of one of the four sides of the quadrangular columnar shape of the second presser body 323K. . In addition, the portion where the first presser body 323J and the second presser body 323K are continuous is perpendicular to the longitudinal direction of the first presser body 323J and the longitudinal direction of the second presser body 323K. Fifteen insertion holes 323L are provided to penetrate. Further, a pair of first connecting portions 323M are provided at the tip of the second presser portion main body 323K so as to face each other in a direction away from the first presser portion main body 323J. Each of the first connecting portions 323M is provided with a sixteenth insertion hole 323N parallel to the fifteenth insertion hole 323L. These sixteenth insertion holes 323N are coaxial with each other.

The stopper member 323H has a flat plate shape with a rectangular outer shape. A fifth protrusion 323P that protrudes in a direction away from this side is provided at the center of one side of the rectangular shape of the stopper member 323H. In addition, a pair of second connecting portions 323Q are provided at both ends of the side opposite to the side on which the fifth protrusion 323P is provided so as to face each other in a direction away from the side. Each of the second connecting portions 323Q is provided with a seventeenth insertion hole 323R in parallel to the side where the second connecting portion 323Q is provided. These 17th insertion holes 323R are coaxial with each other. The stopper member 323H sandwiches the pressing portion main body 323G between the pair of second connecting portions 323Q, and communicates the seventeenth insertion hole 323R and the fifteenth insertion hole 323L. In addition, the stopper member 323H is inserted into the seventeenth insertion hole 323R and the fifteenth insertion hole 323L with the connection pin 323S, and is connected to the presser body 323G so as to be rotatable around the central axis of the connection pin 323S. Further, the second presser portion main body 323K sandwiches the first base portion 323T between the pair of first connecting portions 123G, and communicates the sixteenth insertion hole 323N and the twelfth insertion hole 123J. Further, the second presser portion main body 323K is connected to the first base portion 323T so as to be rotatable about the central axis of the connection pin 123M through the connection pin 123M through the sixteenth insertion hole 323N and the twelfth insertion hole 123J. Yes.

Also, a compression coil spring 123N is inserted through the second protrusion 123F of the second presser body 323K and the first protrusion 123K of the second base 323D. The compression coil spring 123N generates a repulsive force in a direction in which the second protrusion 123F of the second presser part main body 323K is separated from the first protrusion 123K of the second base 323D. As a result, the fifth protrusion 323P of the stopper member 323H fits between the adjacent fourth protrusions 323U of the contact plate 323A. The stopper member 323H is rotatable around the central axis of the connecting pin 323S, but the fifth protrusion 323P can always be guided so as to face the fourth protrusion 323U on the outer periphery of the contact plate 323A. (Not shown).

Next, the operation of the extendable tool of Embodiment 4 will be described. In the compression coil spring 123N that is provided by inserting both ends of the second protrusion 123F of the second presser body 323K and the first protrusion 123K of the second base 323D, the second protrusion 123F is separated from the first protrusion 123K. A repulsive force is generated in the direction. Accordingly, the fifth protrusion 323P of the stopper member 323H of the pressing portion 323C is fitted between the adjacent fourth protrusions 323U of the contact plate 323A. At this time, even if the contact plate 323A is about to rotate, the fifth protrusion 323P of the stopper member 323H of the pressing portion is fitted between the adjacent fourth protrusions 323U of the contact plate 323A. , And the rotation of the rotary shaft 122 is limited. Thereby, it will be in the stop state in which rotation of contact plate 323A and rotation axis 122 is restricted.

Next, the first presser body 323J is moved closer to the base 323B. Then, the fifth protrusion 323P of the stopper member 323H of the pressing portion 323C is disengaged from between the adjacent fourth protrusions 323U of the contact plate 323A. As a result, the stop plate 323 A whose rotation is restricted by the fifth protrusion 323 P and the stop release state in which the rotation in one direction and the other direction of the rotation shaft 122 are released are released.

Next, a mounting method for mounting the fall prevention device 9 between the upper surface 1U of the furniture G installed on the installation surface and the ceiling M using the extendable tool of the fourth embodiment will be described. In the fourth embodiment, the direction in which the first fixed cable 26A is wound around the rotating shaft 122 will be described as an arrow H direction, and the direction in which the first fixed cable 26A is fed from the rotating shaft 122 will be described as an arrow J direction.

Next, the ratchet 50 is inserted into the tool locking part body 25A. At this time, the rotation direction switching lever 50A of the ratchet 50 is operated to switch the rotation shaft 122 so as to rotate in the direction of the arrow H. Then, the ratchet 50 is reciprocated and rotated around the central axis of the rotation shaft 122, and the first fixed rope 26 A is wound around the rotation shaft 122. Then, the gripping part 121L is gripped, and the fifth protrusion 323P of the stopper member 323H is brought into a stop release state in which it is removed from between the adjacent fourth protrusions 323U of the contact plate 323A. Then, the ratchet 50 is rotated in the direction of arrow H, the contact plate 323A and the rotating shaft 122 are rotated, and the first fixed rope 26A is wound around the rotating shaft 122. Then, the ratchet 50 is rotated in the arrow J direction in a stopped state where the fifth protrusion 323P of the stopper member 323H is fitted between the adjacent fourth protrusions 323U of the contact plate 323A. Then, the portion of the ratchet 50 that is locked to the tool locking portion body 25A, the contact plate 323A, and the rotating shaft 122 do not rotate, and only the handle 50B of the ratchet 50 rotates in the arrow J direction.

Then, the rotation direction switching lever 50A of the ratchet 50 is operated to switch the rotation shaft 122 so as to rotate in the direction of the arrow J. Then, the ratchet 50 is reciprocated and rotated around the central axis of the rotating shaft 122, and the first fixed rope 26 A is fed out from the rotating shaft 122. At this time, the holding part 121L is gripped, and the fifth protrusion 323P of the stopper member 323H is brought into a stop release state in which it is removed from between the adjacent fourth protrusions 323U of the contact plate 323A. Then, the ratchet 50 is rotated in the direction of the arrow J, the rotating shaft 122 and the contact plate 323A are rotated, and the first fixed rope 26A is fed out of the rotating shaft 122. Then, the fifth protrusion 323P of the stopper member 323H is brought into a stopped state that fits between the adjacent fourth protrusions 323U of the contact plate 323A, and the ratchet 50 is rotated in the direction of the arrow H. Then, the portion of the ratchet 50 that is locked to the tool locking portion main body 25A, the contact plate 323A, and the rotating shaft 122 do not rotate, and only the handle 50B of the ratchet 50 rotates in the arrow H direction.

Thus, by repeating the above operation, the first fixed rope 26A is fed out from the rotating shaft 122. Then, the fall prevention device 9 extends and the second base comes into contact with a desired position of the ceiling M. Then, the above-described operation is repeated until the first fixed cable 26A that has been drawn loosens. Then, the through holes 26H of the locking members 26C fitted to the bolts 45 of the second base portion 30B and the bolts 45 of the first base portion 30A and the nuts 47 are removed. In this way, the fall prevention device 9 can be mounted between the upper surface 1U of the furniture G installed on the installation surface and the ceiling M using the extendable tool of the fourth embodiment. In the telescopic tool of the fourth embodiment, the direction in which the first fixed rope 26A is wound around the rotary shaft 122 may be used as the arrow J direction, and the direction in which the first fixed rope 26A is unwound from the rotary shaft 122 may be used as the arrow H direction. .

As described above, the retractable tool of the fourth embodiment is telescopic, and the winding unit 320 winds the connecting body 126 that is detachably coupled to both ends of the overturn prevention device 9 to which a repulsive force is applied in the extending direction. Thus, the fall prevention device 9 can be expanded and contracted. Furthermore, this expansion / contraction tool can be stopped by the stop portion 323 so that the connecting body 126 wound by the rotation shaft 122 of the winding portion 320 can be pulled out from the rotation shaft 122 by the repulsive force in the extension direction of the expansion / contraction object. When the stop by the part 323 is released, the coupling body 126 can be fed out from the rotating shaft 122. Moreover, this expansion-contraction tool can rotate the rotating shaft 122 with the ratchet 50 latched by the tool latching | locking part main body 25A provided in the rotating shaft 122. FIG. Thereby, this expansion-contraction tool can expand-contract the fall prevention apparatus 9 easily.

Therefore, the extendable tool of Embodiment 4 is also easy to use.

<Embodiment 5>
The extendable tool of the fifth embodiment is different from the first to fourth embodiments in the configuration of the stop portion 423 of the winding unit 420. Further, parts having the same configurations as those of the first to fourth embodiments are denoted by the same reference numerals as those of the first to fourth embodiments, and detailed description thereof is omitted.

As shown in FIG. 11, the stop portion 423 includes a pair of ratchet plates 23A and a case portion 423A. The pair of ratchet plates 23A is connected to the shaft portion 122F by inserting the fifth insertion holes 23C through the shaft portions 122F protruding from the tenth insertion holes 128A of the lid portion 128. In these ratchet plates 23A, the arrangement of the short side portion 23E and the long side portion 23F of the projecting portion 23D is opposite to each other in the circumferential direction.

The case portion 423A includes a case main body 423B, a spring accommodating portion 423C, and a switching operation portion 423D. The case main body 423B has a cylindrical shape and one end is closed by a case closing portion 423E. The spring accommodating portion 423C protrudes in a direction away from the cylindrical outer periphery of the case main body 423B and is provided on the outer periphery of the case main body 423B. The inside of the spring accommodating portion 423C is hollow and communicates with the space inside the cylindrical case body 423B. A pair of openings 423F that communicate the outside and the inside of the spring housing 423C are provided on both sides of the spring housing 423C in the circumferential direction of the case main body 423B. Further, an eighteenth insertion hole 423G is provided in the vicinity of the spring accommodating portion 423C of the case closing portion 423E of the case main body 423B so as to penetrate in the plate thickness direction.

As shown in FIGS. 12 and 13, the switching operation unit 423D includes an operation unit 423H and a pair of stop plates 423J. The operation unit 423H includes a first operation unit 423K and a second operation unit 423L. Each of the first operation unit 423K and the second operation unit 423L extends in one direction in the shape of a quadrangular prism, and has a V shape and is connected to one end of each other. Thereby, a pair of

surfaces

423P and 423T which are V-shaped and parallel to each other are formed in the operation portion 423H. Further, a concave portion 423M that is depressed and curved is formed in a portion where the first operating portion 423K and the second operating portion 423L are connected. A 19th insertion hole 423N passes through the portion where the first operation unit 423K and the second operation unit 423L are connected to each other perpendicular to the pair of

surfaces

423P and 423T.

Each of the pair of stop plates 423J has a flat plate shape. These stop plates 423J are arranged in a radial direction with respect to the central axis of the nineteenth insertion hole 423N so that the angle formed between them is substantially a right angle, and from the surface opposite to the surface provided with the recess 423M of the operation portion 423H. It protrudes. One stop plate 423J is disposed on the 423T side of the surface on the first operation portion 423K side, and the other stop plate 423J is disposed on the surface 423P side on the second operation portion 423L side. Hereinafter, one stop plate 423J is referred to as a stop plate 423J on the first operation portion 423K side, and the other stop plate 423J is referred to as a stop plate 423J on the second operation portion 423L side. The switching operation unit 423D inserts the first operation unit 423K and the second operation unit 423L through the pair of openings 423F of the case main body 423B, respectively. The switching operation portion 423D communicates the 19th insertion hole 423N with the 18th insertion hole 423G of the case body 423B. Further, the switching operation unit 423D inserts the connection pin 423Q through the 19th insertion hole 423N and the 18th insertion hole 423G, and is connected to the case body 423B so as to be rotatable around the central axis of the connection pin 423Q. A compression coil spring 423R is accommodated in the spring accommodating portion 423C of the case main body 423B. One end of the compression coil spring 423R is inserted into a sixth protrusion 423S provided inside the spring accommodating portion 423C, and the other end is in contact with the recess 423M of the operation portion 423H. Thereby, the repulsive force of the compression coil spring 423R is given toward the 19th insertion hole 423N of the operation part 423H. The case portion 423 A covers the pair of ratchet plates 23 A and the rotating shaft 122 with the other open end of the cylinder facing the winding portion main body 121, and is connected to the winding portion main body 121.

The repulsive force of the compression coil spring 423R is applied to the switching operation portion 423D toward the 19th insertion hole 423N of the operation portion 423H. For this reason, the other end of the compression coil spring 423R does not stay at the intermediate position between the first operation unit 423K and the second operation unit 423L of the recess 423M of the operation unit 423H, and the first operation unit 423K side of the recess 423M or the first 2 Stays at a position shifted to any position on the operation unit 423L side. As a result, either the state in which the first operation unit 423K of the switching operation unit 423D approaches the spring housing unit 423C or the state in which the second operation unit 423L approaches the spring housing unit 423C is entered. Further, when the switching operation portion 423D is rotated in the direction in which the first operation portion 423K is brought closer to the spring accommodating portion 423C, the tip of the stop plate 423J on the second operation portion 423L side of the ratchet plate 23A close to the case closing portion 423E. It abuts against the protrusion 23D (see FIG. 12). Further, when the switching operation portion 423D is rotated in a direction in which the second operation portion 423L is brought closer to the spring accommodating portion 423C, the tip of the stop plate 423J on the first operation portion 423K side protrudes from the ratchet plate 23A close to the lid portion 128. It contacts the part 23D (see FIG. 13).

Next, the operation of the extendable tool of Embodiment 5 will be described. As shown in FIG. 12, the switching operation portion 423D is rotated in a direction in which the first operation portion 423K is brought closer to the spring accommodating portion 423C. Then, the tip of the stop plate 423J on the second operating portion 423L side comes into contact with the protruding portion 23D of the ratchet plate 23A close to the case closing portion 423E. At this time, the pair of ratchet plates 23A and the rotating shaft 122 are pressed in the direction in which the short side portion 23E of the protruding portion 23D of the ratchet plate 23A close to the case closing portion 423E comes into contact with the front end of the other stop plate 423J (hereinafter referred to as the following) Rotation in the direction of arrow L) is limited. However, rotation in the direction in which the short side portion 23E of the protruding portion 23D of the ratchet plate 23A near the case closing portion 423E leaves from the tip of the locking plate on the second operation portion 423L side (hereinafter referred to as the arrow K direction) is not limited. . At this time, the stop plate 423J of the first operating portion 423K is separated from the protruding portion 23D of the ratchet plate 23A close to the lid portion 128. That is, the pair of ratchet plates 23 A and the rotating shaft 122 are in a semi-stop state in which the rotating shaft 122 rotates in the arrow K direction.

Next, as shown in FIG. 13, the switching operation portion 423D is rotated in a direction in which the second operation portion 423L is brought closer to the spring accommodating portion 423C. Then, the stop plate 423J on the first operating portion 423K side comes into contact with the protruding portion 23D of the ratchet plate 23A close to the lid portion 128. At this time, the pair of ratchet plates 23A and the rotating shaft 122 are pressed by the short side portion 23E of the protruding portion 23D of the ratchet plate 23A close to the lid portion 128 at the tip of the stop plate 423J on the first operating portion 423K side. Rotation in the direction (hereinafter referred to as the arrow K direction) is limited. However, the rotation in the direction in which the short side portion 23E of the protruding portion 23D of the ratchet plate 23A near the lid portion 128 is separated from the tip of the stop plate 423J on the first operating portion 423K side (hereinafter referred to as the arrow L direction) is not limited. At this time, the stop plate 423J on the second operation portion 423L side is separated from the protruding portion 23D of the ratchet plate 23A close to the case closing portion 423E. That is, the pair of ratchet plates 23 A and the rotating shaft 122 are in a semi-stop state in which they can rotate in the direction of the arrow L.

Next, a mounting method for mounting the fall prevention device 9 between the upper surface 1U of the furniture G installed on the installation surface and the ceiling M using the extendable tool of the fifth embodiment will be described. In the fifth embodiment, the direction in which the first fixed cable 26A is wound around the rotation shaft 122 will be described as an arrow K direction, and the direction in which the first fixed cable 26A is fed from the rotation shaft 122 will be described as an arrow L direction.

Next, the ratchet 50 is reciprocated and rotated around the central axis of the rotating shaft 122, and the first fixed rope 26 A is wound around the rotating shaft 122. At this time, the switching operation portion 423D is rotated in a direction in which the first operation portion 423K is brought closer to the spring accommodating portion 423C (see FIG. 12). Thereby, rotation of the pair of ratchet plates 23A and the rotation shaft 122 in the direction of the arrow K is not limited.

Then, the ratchet 50 is inserted into the tool locking part body 25A. At this time, the rotation direction switching lever 50A of the ratchet 50 is operated to switch the rotation shaft 122 to rotate in the direction of rotating in the arrow K direction. Then, the grip portion 121L is gripped, the ratchet 50 is rotated in the arrow K direction, the pair of ratchet plates 23A and the rotating shaft 122 are rotated in the arrow K direction, and the first fixed rope 26A is wound around the rotating shaft 122. take.

Then, the ratchet 50 is rotated in the arrow L direction. Then, the portion of the ratchet 50 that is locked to the tool locking portion body 25A, the pair of ratchet plates 23A, and the rotating shaft 122 do not rotate in the direction of arrow L, and only the handle 50B of the ratchet 50 rotates in the direction of arrow L. To do. Thus, by repeating the above operation, the first fixed cable 26A is wound around the rotary shaft 122, the overturn prevention device 9 is contracted, and the ceiling M and the furniture for attaching the overturn prevention device 9 to the entire length of the overturn prevention device 9 are installed. The length is suitable for the dimension between the upper surface 1U of G. Then, the non-slip portion 37 of the first base portion 30A is brought into contact with the wall surface W side of the upper surface 1U of the furniture G. Then, the second base portion 30B is arranged farther from the wall surface W side than the first base portion 30A (see FIG. 7).

Then, the rotation direction switching lever 50A of the ratchet 50 is operated to switch the rotation shaft 122 so as to rotate in the direction of the arrow L. Further, the switching operation portion 423D is rotated in a direction in which the second operation portion 423L is brought closer to the spring accommodating portion 423C (see FIG. 13). As a result, the stop plate 423J on the first operating portion 423K side comes into contact with the protruding portion 23D of the ratchet plate 23A close to the lid portion 128, and the rotation of the pair of ratchet plates 23A and the rotation shaft 122 in the arrow L direction is released. Is done.

Then, the ratchet 50 is reciprocated and rotated around the central axis of the rotating shaft 122, and the first fixed rope 26 A is fed out from the rotating shaft 122. At this time, the grip part 121L is gripped and the ratchet 50 is rotated in the direction of the arrow L. Then, the pair of ratchet plates 23A and the rotating shaft 122 rotate in the direction of arrow L.

Then, the ratchet 50 is rotated in the arrow K direction. Then, the portion of the ratchet 50 that is locked to the tool locking portion main body 25A, the pair of ratchet plates 23A, and the rotating shaft 122 do not rotate in the arrow K direction, and only the handle 50B of the ratchet 50 rotates in the arrow K direction.

Thus, by repeating the above operation, the first fixed rope 26A is fed out from the rotating shaft 122. Then, the fall prevention device 9 extends and the second base comes into contact with a desired position of the ceiling M. Then, the above-described operation is repeated until the first fixed cable 26A that has been drawn loosens. Then, the through holes 26H of the locking members 26C fitted to the bolts 45 of the second base portion 30B and the bolts 45 of the first base portion 30A and the nuts 47 are removed. In this way, the fall prevention device 9 can be mounted between the upper surface 1U of the furniture G installed on the installation surface and the ceiling M using the extendable tool of the fourth embodiment.

As described above, the retractable tool of the fifth embodiment is retractable, and the winding body 420 winds up the connecting body 126 that is detachably connected to both ends of the fall prevention device 9 to which a repulsive force is applied in the extending direction. Thus, the fall prevention device 9 can be expanded and contracted. Furthermore, this expansion / contraction tool can be stopped by the stop portion 423 so that the connecting body 126 wound around the rotation shaft 122 of the winding portion 420 can be pulled out of the rotation shaft 122 by the repulsive force in the extension direction of the expansion / contraction object. When the stop by the portion 423 is released, the coupling body 126 can be unwound from the rotating shaft 122. Moreover, this expansion-contraction tool can rotate the rotating shaft 122 with the ratchet 50 latched by the tool latching | locking part main body 25A provided in the rotating shaft 122. FIG. Thereby, this expansion-contraction tool can expand-contract the fall prevention apparatus 9 easily.

Therefore, the extendable tool of Embodiment 5 is also easy to use.

<Embodiment 6>
The extendable tool of the sixth embodiment is different from the first to fifth embodiments in the configuration of the winding unit main body 521, the stop unit 523, the gripping unit 521L, and the like of the winding unit 520. Further, parts having the same configuration as in the first to fifth embodiments are denoted by the same reference numerals as those in the first to fifth embodiments, and detailed description thereof is omitted.

As shown in FIGS. 14 and 15, the winding unit main body 521 includes a rotating shaft 522, a fixing member 522 D, and a pair of winding members 522 E. The rotating shaft 522 has a cylindrical shape and extends in one direction. A tool locking portion main body 25 A that is a tool locking portion 125 is connected to one end of the rotating shaft 522. Further, a screw thread 522A is engraved on the outer periphery of the other end of the rotating shaft 522 (see FIG. 15).

The fixing member 522D is formed in a flat plate shape extending in one direction. The fixing member 522D has a flat plate shape with a direction (longitudinal direction) extending in one direction perpendicular to a direction in which the central axis of the rotation shaft 522 extends, and a flat plate thickness direction in a direction in which the central axis extends. A twentieth insertion hole 522B provided in the central portion is inserted through the rotation shaft 522 and connected to the rotation shaft 522 (see FIG. 15).

The pair of winding members 522E has a columnar shape and extends in one direction. These winding members 522E are arranged with the rotation shaft 522 sandwiched between them so that the direction in which the respective central axes extend is parallel to the direction in which the central axis of the rotation shaft 522 extends. Each of the winding members 522E is provided with a predetermined interval between the rotating shaft 522 and the winding member 522E. In addition, the winding members 522E are connected to the fixing member 522D by contacting one end of each columnar shape with one flat plate surface of both ends of the fixing member 522D extending in one direction.

The stop portion 523 includes a first contact plate 523A and a pair of disc springs 523B. The first abutting plate 523A has a disk shape, and a 21st insertion hole 523H is provided in the center in the thickness direction (see FIG. 15). In the first contact plate 523A, a 21st insertion hole 523H is inserted through the other end of the rotation shaft 522. Also, one surface of the first contact plate 523A is in contact with the other surface of the fixing member 522D.

Each of the pair of disc springs 523B has an annular shape. These disc springs 523B are formed such that the position of the inner peripheral edge is shifted in the annular central axis direction with respect to the outer peripheral edge. Thus, when these disc springs 523B are pushed in the direction of the center axis of the ring and in a direction in which the outer peripheral edge and the inner peripheral edge are brought closer to each other, they are opposed to the pushed force according to the magnitude of the pushed force, Elastic force is generated in a direction in which the outer peripheral edge and the inner peripheral edge are separated. These disc springs 523B are inserted into the other end of the rotating shaft 522 with the annular central axes aligned and the outer peripheral edges abutted so that the inner peripheral edges are separated from each other (see FIG. 15). ). Of these disc springs 523B, the inner peripheral edge of one surface of the disc spring 523B disposed on the first contact plate 523A side is in contact with the other surface of the first contact plate 523A.

The grip portion 521L has a flat plate shape and extends in one direction. The grip portion 521L is provided with a twenty-second insertion hole 521A penetrating in one plate extending in one direction in a flat plate thickness direction (see FIG. 15). In the gripper 521L, the other end of the rotating shaft 522 is inserted into the twenty-second insertion hole 521A. The gripper 521L is rotatable with respect to the rotation shaft 522. Also, one surface of the grip portion 521L is in contact with the inner peripheral edge of the other surface of the disc spring 523B disposed on the grip portion 521L side of the pair of disc springs 523B.

Also, a second contact plate 524 is provided in contact with the other flat surface of the grip portion 521L. Specifically, the second contact plate 524 has a disk shape and is provided with a 23rd insertion hole 524A penetrating in the thickness direction in the center (see FIG. 15). In the second contact plate 524, the other end of the rotation shaft 522 is inserted into the 23rd insertion hole 524A. In addition, one surface of the second contact plate 524 is in contact with the other surface of the grip portion 521L.

Further, a screw thread 522A at the other end of the rotating shaft 522 that is inserted through the 23rd insertion hole 524A of the second contact plate 524 and protrudes from the other surface of the second contact plate 524 has a tightening nut 525, and A locking nut 526 is threaded. The tightening nut 525 is screwed into the thread 522 A of the rotating shaft 522, and one end surface is in contact with the other surface of the second contact plate 524. The loosening nut 526 is screwed into the screw thread 522A of the rotating shaft 522, and one end surface is in contact with the other end surface of the tightening nut 525. At this time, the position of the tightening nut 525 relative to the rotating shaft 522 is increased by tightening the loosening nut 526 to the other end of the rotating shaft 522 while holding the tightening nut 525 so as not to rotate with respect to the rotating shaft 522. Can be fixed in a desired position.

The first fixed rope 26A of the connecting body 126 has a middle portion in the longitudinal direction disposed between one winding member 522E and the rotating shaft 522. Thus, the extensible tool of Embodiment 6 is formed.

Next, the operation of the extension tool of Embodiment 6 will be described.

The pair of disc springs 523B have their inner peripheral edges approaching each other on one surface of the grip portion 521L and the other surface of the first contact plate 523A by screwing a tightening nut 525 into the screw thread 522A of the rotating shaft 522. Will be pushed in the direction. Thereby, the pair of disc springs 523B generate a repulsive force (hereinafter referred to as a repelling force of the disc spring 523B) in a direction in which one surface of the grip portion 521L and the other surface of the first contact plate 523A are separated from each other. Thereby, a frictional force is generated between the grip portion 521L and the first contact plate 523A based on the repulsive force of the pair of disc springs 523B (hereinafter, between the grip portion 521L and the first contact plate 523A). Is called frictional force.) Thereby, it will be in the stop state in which rotation of axis of rotation 522 to grip part 521L is restricted. Specifically, when the magnitude of the rotational force that rotates the rotation shaft 522 relative to the grip portion 521L is smaller than the frictional force between the grip portion 521L and the first contact plate 523A, the rotation shaft 522 relative to the grip portion 521L. It will be in a stop state where the rotation of is limited. On the other hand, when the magnitude of the rotational force for rotating the rotary shaft 522 relative to the grip portion 521L is larger than the frictional force between the grip portion 521L and the first contact plate 523A, the rotary shaft 522 for the grip portion 521L. The stop is released when the rotation of is released.

Next, a mounting method for mounting the fall prevention device 9 between the upper surface 1U of the furniture G installed on the installation surface and the ceiling M using the extendable tool of the sixth embodiment will be described. In the sixth embodiment, the direction in which the first fixed cable 26A is wound around the rotation shaft 522 is referred to as an arrow P direction, and the direction in which the first fixed cable 26A is extended from the rotation shaft 522 is described as an arrow N direction.

Next, the ratchet 50 is inserted into the tool locking part body 25A. At this time, the rotation direction switching lever 50A of the ratchet 50 is operated to switch the rotation shaft 522 to rotate in the direction of the arrow P. Then, the ratchet 50 is reciprocated and rotated around the central axis of the rotation shaft 522 to wind up the first fixed rope 26 A around the winding portion main body 521. Then, the grip portion 521L is gripped, the ratchet 50 is rotated in the direction of arrow P, the winding portion main body 521 is rotated around the central axis of the rotating shaft 122, and the first fixed rope 26A is wound around the winding portion main body 521. . At this time, a frictional force is generated between the grip portion 521L and the first contact plate 523A. For this reason, the force for rotating the ratchet 50 in the direction of arrow P is made larger than the sum of the frictional force between the grip portion 521L and the first contact plate 523A and the repulsive force in the extension direction of the overturn prevention device 9.

Next, the ratchet 50 is rotated in the arrow N direction. At this time, when the repulsive force in the extension direction of the overturn prevention device 9 is smaller than the frictional force between the grip portion 521L and the first contact plate 523A, the portion locked to the tool locking portion main body 25A of the ratchet 50, The first abutment plate 523A and the winding portion main body 521 do not rotate, and only the handle 50B of the ratchet 50 rotates in the arrow N direction. On the other hand, if the repulsive force in the extension direction of the overturn prevention device 9 is greater than the frictional force between the grip portion 521L and the first contact plate 523A, the ratchet 50 is locked to the tool locking portion main body 25A. The portion, the first contact plate 523A, and the winding portion main body 521 rotate together with the handle 50B of the ratchet 50 in the arrow N direction. That is, the first fixed rope 26 A wound around the winding portion main body 521 is unintentionally drawn out from the winding portion main body 521.

In this case, the locking nut 526 screwed into the screw thread 522A of the rotating shaft 522 is once loosened, and the tightening nut 525 is further screwed into the screw thread 522A of the rotating shaft 522. Then, while holding the tightening nut 525 so as not to rotate with respect to the rotating shaft 522, the loosening nut 526 is tightened again on the thread 522 A of the rotating shaft 522 to fix the position of the tightening nut 525 with respect to the rotating shaft 522. To do. As a result, the pair of disc springs 523B are pushed with a larger force between one surface of the grip portion 521L and the other surface of the first contact plate 523A, and thus the repulsive force of the pair of disc springs 523B is reduced. Become bigger. Thereby, the frictional force between the grip portion 521L and the first contact plate 523A can be further increased. In this way, the first fixed rope 26A wound around the winding portion main body 521 is made larger by increasing the frictional force between the grip portion 521L and the first contact plate 523A than the repulsive force in the extending direction of the fall prevention device 9. However, it is possible to rotate only the handle 50B of the ratchet 50 in the arrow N direction while suppressing unintentional unwinding from the winding portion main body 521.

In this way, by repeating the above operation, the first fixed cable 26A is wound around the winding portion main body 521, the overturn prevention device 9 is contracted, and the total length of the overturn prevention device 9 is attached to the ceiling M to which the overturn prevention device 9 is attached. And a length suitable for the dimension between the upper surface 1U of the furniture G. Then, the non-slip portion 37 of the first base portion 30A is brought into contact with the wall surface W side of the upper surface 1U of the furniture G. Then, the second base portion 30B is arranged farther from the wall surface W side than the first base portion 30A (see FIG. 7).

Then, the rotation direction switching lever 50A of the ratchet 50 is operated to switch the rotation shaft 522 so as to rotate in the direction of rotating in the arrow N direction. Then, the ratchet 50 is reciprocated and rotated around the central axis of the rotation shaft 522, and the first fixed rope 26 A is fed out from the winding portion main body 521. At this time, the force for rotating the ratchet 50 in the direction of arrow N is greater than the difference between the frictional force between the grip portion 521L and the first contact plate 523A and the repulsive force in the extension direction of the overturn prevention device 9.

Next, the ratchet 50 is rotated in the direction of arrow P. Then, the portion of the ratchet 50 that is locked to the tool locking portion main body 25A, the first contact plate 523A, and the winding portion main body 521 do not rotate, and only the handle 50B of the ratchet 50 rotates in the arrow P direction. .

Thus, by repeating the above operation, the first fixed rope 26A is fed out from the winding unit main body 521. Then, the fall prevention device 9 extends and the second base comes into contact with a desired position of the ceiling M. Then, the above-described operation is repeated until the first fixed cable 26A that has been drawn loosens. Then, the through holes 26H of the locking members 26C fitted to the bolts 45 of the second base portion 30B and the bolts 45 of the first base portion 30A and the nuts 47 are removed. In this way, the fall prevention device 9 can be mounted between the upper surface 1U of the furniture G installed on the installation surface and the ceiling M using the extendable tool of the sixth embodiment. In addition, the direction which winds up the 1st fixed rope 26A to the winding-up part main body 521 is made into the arrow N direction, and the direction which pays out the 1st fixed rope 26A from the winding-up part main body 521 is made into the arrow P direction. It may be used.

As described above, the retractable tool of the sixth embodiment is retractable, and the winding body 520 winds the connecting body 126 that is detachably connected to both ends of the overturn prevention device 9 to which a repulsive force is applied in the extending direction. Thus, the fall prevention device 9 can be expanded and contracted. Furthermore, this expansion / contraction tool stops by the stop part 523 that the coupling body 126 wound up by the winding part main body 521 of the winding part 520 is pulled out from the winding part main body 521 by the repulsive force in the extension direction of the expansion / contraction object. The connecting body 126 can be fed out from the winding unit main body 521. In addition, the retractable tool can rotate the winding unit main body 521 by a ratchet 50 that is locked to the tool locking unit main body 25 A provided on the rotary shaft 122. Thereby, this expansion-contraction tool can expand-contract the fall prevention apparatus 9 easily.

Therefore, the extendable tool of Embodiment 6 is also easy to use.

The present invention is not limited to the first to sixth embodiments described with reference to the above description and the drawings. For example, the following embodiments are also included in the technical scope of the present invention.
(1) In the first to sixth embodiments, the first fixed cable and the second fixed cable are band-shaped, but the present invention is not limited to this, and the first fixed cable and the second fixed cable may be formed in a string shape.
(2) In Embodiments 2 to 5, the take-up unit main body is provided with a gripping portion. However, the present invention is not limited to this, and the outer peripheral surface of the take-up unit main body is subjected to knurling, A cylindrical grip or the like may be wound around the outer peripheral surface to facilitate gripping.
(3) In the second to fifth embodiments, the first fixed cable is inserted into the second long hole of the winding unit main body and the clearance of the rotary shaft, and the first fixed cable is wound around the rotary shaft. Not only it but one end part of the 1st fixed line is connected with the perimeter of a winding part main part, and the ring formed in the one end part of the 2nd fixed line is inserted in one winding member of a rotating shaft. In this way, it is good also as a structure which winds up a 2nd fixed rope with a rotating shaft.
(4) In the sixth embodiment, a pair of disc springs is used. However, the present invention is not limited to this, and one disc spring may be used, or three or more disc springs may be used.
(5) In Embodiment 6, the inner peripheral edges of the pair of disc springs are separated from each other so that the annular central axes are aligned and the outer peripheral edges are brought into contact with each other. You may overlap and use the direction from which the inner periphery with respect to a periphery shift | deviates.

9 ... Fall prevention device (expandable), 20, 120, 220, 320, 420, 520 ... Winding part, 22, 122, 522 ... Rotating shaft, 23, 123, 223, 323, 423, 523 ... Stop part, 25, 125 ... tool locking part, 26, 126 ... coupling body, 121L, 521L ... gripping part

Claims

A linking body that is detachably coupled to both ends of the stretchable body that is stretchable and has a repulsive force in the extending direction;
A winding part having a rotating shaft for winding the connection body;
A stop for stopping the rotation of the rotating shaft;
A tool locking portion that is provided on the rotating shaft and locks a tool that rotates the rotating shaft;
A telescopic tool characterized by comprising:
The extension tool according to claim 1, wherein the stop portion stops the rotation shaft at predetermined angles.
2. The expansion and contraction according to claim 1, wherein a resistance force that opposes the repulsive force is generated when the coupling body wound around the rotating shaft is fed out by the repulsive force applied in an extension direction. tool.
The expansion and contraction according to claim 2, wherein a resistance force that opposes the repulsive force is generated when the coupling body wound around the rotating shaft is fed out by the repulsive force applied in an extension direction. tool.
2. The expansion / contraction tool according to claim 1, wherein the winding unit includes a gripping unit that grips the rotating body when the rotating body is rotated to wind up the coupling body.
3. The expansion / contraction tool according to claim 2, wherein the winding unit includes a gripping unit that grips the rotating body when the rotating body is rotated to wind up the coupling body.
4. The expansion / contraction tool according to claim 3, wherein the winding unit includes a gripping unit that grips the rotating body when the rotating body is rotated to wind up the coupling body.
5. The expansion / contraction tool according to claim 4, wherein the winding unit includes a gripping unit that grips the rotating body when the rotating body is rotated to wind up the coupling body.