JP3790936B2 - Device for preventing fall of carrier in lifting device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a fall prevention device for a transporter in a lifting device, and is particularly suitable for use in a two-stage parking device.
[0002]
[Prior art]
In a two-stage parking device, which is a type of lifting device, when a hoisting support such as a wire rope provided in the hoisting device is cut or when a failure occurs in the lifting device, The carrier (elevating stage) can no longer be supported and the carrier falls. For this reason, in order to ensure the safety of the user, it is necessary to take measures to prevent the fall of the transporter. Various devices have already been devised as such a fall prevention device for the transporter.
[0003]
For example, there is a device for preventing a fall of the transporter during the upper limit stop by temporarily placing a hook or a pin taken out from the main body frame on the transporter after putting the car in the transporter and raising the transporter to the upper limit stop position. Are known.
[0004]
In addition, as a device for preventing the fall of the transporter during ascending / descending, a locking hole is provided in the pillar of the lifting frame at a constant pitch, and when the transporter falls, a pin or a claw jumps out from the transporter and this locking hole It is known to enter and support the carrier and prevent the carrier from falling.
[0005]
[Problems to be solved by the invention]
In the prior art described above, the former has a drawback that it is not possible to prevent the transporter from falling during the raising and lowering of the transporter even though the transporter can be prevented from dropping at the upper limit stop position.
[0006]
In the latter case, the locking holes provided in the column of the lifting frame require pressure, so they must be opened at certain intervals and cannot be provided continuously. Met. For this reason, at the time of an abnormality, the carrying device would fall freely to the next lower locking hole at the time of dropping, and the carrying device could not be stopped immediately.
[0007]
Therefore, the transporter that stops after the free fall acceleration has a drawback that an impact is generated and a certain fall distance is inevitably generated. Furthermore, since the locking holes need to be processed over the entire length of the lifting / lowering frame, there remains a problem that the cost increases.
[0008]
[Means for Solving the Problems]
  The present invention has been made to solve the above-described conventional problems.Instantly and reliablyAn object of the present invention is to provide a carrier fall prevention device in an elevating device that is stopped and cost-effective.
[0009]
[Means for Solving the Problems]
  According to the first aspect of the present invention, a vertical guide rail is provided between the base member and the support beam provided above the base member, and a hoisting device for raising and lowering the transporter is provided along the guide rail. The beam member holding the carrier is slidably supported by a support structure suspended from the hoisting device via a hoisting support, and a braking mechanism is provided near both ends of the beam material. The support structure includes an intermediate portion of an opening lever that detects a sliding displacement amount of the support structure and the beam member.RotatingThe braking mechanism is supported at both ends of the release lever.The two eccentric cam rollers provided in each are driven synchronouslyIn the event of an abnormality,A separate structure from the body frame spanned between the base member and the support beamSupport plateThe two eccentric cam rollers provided in the braking mechanism respectively from both outer sidesIt is characterized by being sandwiched.
[0010]
In the first aspect of the invention, after the automobile is loaded on the carrier, when the hoisting device is energized, the hoisting support is wound up and attached to the suspended intermediate portion of the hoisting support. The support structure is lifted upward. Thereby, both the beam material and the transporter are wound up.
[0011]
  When the support structure is lifted upward, the support structureRotatingThe attached release lever also moves upward. As a result, both ends of the release lever also move upward, and a braking mechanism is provided so that the support plate spanned between the base member and the support beam is not pinched.The two eccentric cam rollers provided in each are driven synchronouslyTo allow the carrier to move up and down.
[0012]
  In the unlikely event that the hoisting support is cut off during lifting, and the force to support the support structure is lost, the release lever moves downward and the support plate spanned between the foundation member and the support beam is removed.From both sidesBraking mechanism to pinch2 eccentric cam rollers provided for eachTo prevent the carrier from falling.
[0013]
According to a second aspect of the present invention, the braking mechanism provided in the vicinity of both ends of the beam member is provided symmetrically about the support structure, and two eccentric cam rollers are incorporated in the braking mechanism. Two synchronous gears for rotating the eccentric cam roller synchronously and symmetrically are provided at the shaft end that supports the eccentric cam roller, and a sliding between the support structure and the beam material is provided between the upper pins provided on the synchronous gear. Both ends of the release lever for detecting the amount of dynamic displacement are slidably engaged, and when the release lever is biased upward, the eccentric cam rollers are opened to be provided on the synchronous gear. Further, biasing means is provided between the lower pins so that the eccentric cam roller is biased in the direction of sandwiching the support plate.
[0014]
In the invention according to claim 2, after the automobile is loaded on the carrier, when the hoisting device is energized, the hoisting support is wound up, and the support attached to the suspended intermediate portion of the hoisting support. The structure is lifted upward.
[0015]
  When the support structure is lifted upward, the support structureRotatingThe attached release lever also moves upward. As a result, the upper pin of the synchronous gear with which both ends of the release lever are slidably engaged is pivoted upward about the axis.
[0016]
At this time, since the urging force of the urging means is smaller than the urging force for urging the release lever upward due to the weight of the transporter or the like, the interval between the lower pins holding the urging means is widened to the urging means. The synchronous gear rotates against this.
[0017]
  By the rotation of this synchronous gear,2 eachThe eccentric cam rollers face each other with a short radius, and the distance between the eccentric cam rollers isDrive synchronouslyIt is unfolded and a gap is generated between the support plate and the carrier plate is opened, so that the carrier can be raised and lowered.
[0018]
  In the unlikely event that the hoisting support is cut during lifting, the force to support the supporting structure disappears, or the rotating force by the biasing means is greater than the rotating force due to the weight of the lifting part, and the supporting force decreases. In this case, the urging means immediately urges the synchronous gears to rotate upward with respect to each other about the shaft,2 eachEccentric cam rollerIs driven in sync and rotated inward.
[0019]
  by this,TwoThe eccentric cam roller is a support plateAt the same time,By the force due to the weight of the biasing means and support structure,2 eachA frictional force is generated between the eccentric cam roller and the support plate.
[0020]
  This eccentric action produces a wedge effect on the eccentric cam roller,2 eachThe eccentric cam roller securely holds the support plate from both outer sides.
[0021]
The invention according to claim 3 is characterized in that protruding portions are formed on opposing circumferential surfaces of the eccentric cam roller to improve the clamping force to the support plate.
[0022]
In the invention described in claim 3, the protruding portions formed on the opposed peripheral surfaces of the eccentric cam roller will bite into the support plate strongly, so that a larger braking force is generated and the transporter can be stopped and held more reliably. I can do it. This wedge effect works stronger as the weight of the car on the carrier increases.
[0023]
The invention according to claim 4 is characterized in that the support plate spanned between the support beam and the base member is formed of a rigid member that can be replaced as a separate structure from the main body frame.
[0024]
According to a fourth aspect of the present invention, if the support plate is made of a replaceable rigid member, and the fall prevention device is activated, the fall support device and the lifting device can be repaired and rolled up to recover the fall prevention device. Can be opened easily and ready for use again. Therefore, it is possible to easily take down the automobile on the carrier.
[0025]
DETAILED DESCRIPTION OF THE INVENTION
  In this invention grasped | ascertained from description of Claim 1, as shown in FIG. 1, the vertical guide rails 4 and 4 are provided between the base member 3 and the support beam 5 provided in the upper direction of the base member 3. As shown in FIG. . A hoisting device 11 for raising and lowering the transporter 10 is provided along the guide rails 4 and 4, and the transporter 10 is held by a support structure 14 suspended from the hoisting device 11 via a hoisting support 12. The beam member 8 is slidably supported. A braking mechanism 25 is provided in the vicinity of both ends of the beam member 8, and an intermediate portion of an opening lever 26 that detects the amount of sliding displacement between the support structure 14 and the beam member 8 is provided on the support structure 14.RotatingThe brake mechanism 25 is supported at both ends of the release lever 26.2 eccentric cam rollers provided for each 31 , 31 Tuned driveLet At the time of abnormalityThe base material Three And support beam Five Support plate with a different structure from the main body frame 36 The braking mechanism twenty five 2 eccentric cam rollers provided for each 31 , 31 From both outsideTry to pinch.
[0026]
In the present invention ascertained from the description of claim 2, as shown in FIGS. 3 and 6, the braking mechanism 25 provided in the vicinity of both ends of the beam member 8 is provided symmetrically about the support structure 14. Two eccentric cam rollers 31, 31 are incorporated in the braking mechanism 25, and the eccentric cam rollers 31, 31 are rotated synchronously and symmetrically on the shaft end 32 that supports the eccentric cam rollers 31, 31. Synchronous gears 37, 37 are provided. Between the upper pins 39, 39 provided on the synchronous gears 37, 37, both ends of the release lever 26 for detecting the sliding displacement amount of the support structure 14 and the beam member 8 are slidably engaged. When the release lever 26 is biased upward, the eccentric cam rollers 31, 31 are opened. Further, an urging means 41 is provided between the lower pins 40, 40 provided on the synchronous gears 37, 37, and the eccentric cam rollers 31, 31 are urged to sandwich the support plate 36.
[0027]
In this invention grasped | ascertained from description of Claim 3, as shown in FIG.6 and FIG.7, the knurling process and the nail | claw process are given to the opposing peripheral surface of the eccentric cam rollers 31,31, and the convex part 31a is formed. Thus, the clamping force to the support plate 36 is improved.
[0028]
In this invention grasped | ascertained from description of Claim 4, as shown in FIG.1 and FIG.8, the support plate 36 spanned between the support beam 5 and the base member 3 is replaceable as a structure different from a main body frame. It is composed of a rigid member.
[0029]
【Example】
Hereinafter, an embodiment of the present invention will be described with reference to FIGS. In this embodiment, a fall prevention device for a transporter is used in a two-stage parking device installed on a floor surface. The two-stage parking device 1 (elevating device) has an overall configuration that is substantially L-shaped, and is erected vertically from the base members 3 and 3 placed on the floor 2 and the base members 3 and 3 respectively. The main body frame is constituted by the two guide rails 4 and 4 and the support beam 5 connecting the upper portions between the guide rails 4 and 4.
[0030]
Fork beams 6, 6 formed in an L shape are supported on the guide rails 4, 4 through guide rollers 7, 7,. The fork beams 6 and 6 are connected and integrated by a beam material 8 described later. On the horizontal portions 6a and 6a of the fork beams 6 and 6, an iron plate-shaped carrier 10 for mounting the automobile 9 is attached. In addition, what is indicated by reference numeral 10a is a square pipe for preventing the wheel from being removed, which is attached to the side of the carrier 10. Also, what is denoted by reference numeral 3a is a boarding stage of a lower parking car attached to the base member 3.
[0031]
On the other hand, a hoisting device 11 is attached to the support beam 5. The hoisting device 11 is wound with a hoisting support 12 composed of a nylon belt, a wire rope, etc., and a sheave 13 etc. A support structure 14 is attached. The support member 14 is slidably supported by a beam member 8 connected to the fork beams 6 and 6.
[0032]
The portion of the support structure 14 will be described in detail with reference to FIGS. The support structure 14 includes two parallel plate members 14a and 14a and two parallel plate members 14b and 14b welded orthogonally to the upper portions of the plate members 14a and 14a. A sheave 13 is rotatably supported by a shaft 15 between the upper plate members 14b and 14b.
[0033]
In FIG. 4, the reference numeral 16 indicates a bearing built in the sheave 13, and the reference numeral 17 indicates a collar. 3 and 4, reference numeral 18 denotes a sheave cover that protects the sheave 13, and reference numeral 19 in FIG. 4 denotes a key that prevents the shaft 15 that supports the sheave 13 from coming off. It is a plate.
[0034]
On the other hand, the lower plate members 14a and 14a of the support structure 14 are inserted from above in such a manner that the central portion of the beam member 8 is sandwiched from both sides, and between the lower end portions on the open side, as shown in FIG. As shown in the figure, a bracket 20 formed in a cross beam shape by two plate members 20a, 20a and pipe members 20b, 20b connecting the plate members 20a, 20a is fixed by a fastening means 21.
[0035]
At this time, as shown in FIG. 5, the height of the space formed between the lower plate members 14a and 14a of the support structure 14, that is, the height between the upper surface of the bracket 20 and the lower surface of the upper plate member 14b. By making the height H larger than the height h of the beam member 8, a gap (about 2.5 cm) 22 is formed between the upper surface of the beam member 8 and the lower surface of the upper plate member 14b.
[0036]
As a result, the beam member 8 is supported on the support structure 14 so as to be slightly slidable in the vertical direction. FIG. 5 shows a state where the upper surface of the bracket 20 is in contact with the lower surface of the beam member 8 and the support structure 14 is rolled up. 3 and 4, the reference numeral 23 indicates a sliding guide member welded to the beam member 8 and in contact with the side surface of the plate member 14a.
[0037]
3 to 5, a pin 24 is attached to the center of the lower end portion on one side of the lower plate member 14a, and an eccentric cam roller 31 (see FIG. An opening lever 26 is attached to open the opening (see FIG. 6). As shown in FIG. 6, the release lever 26 is formed in a substantially plane H shape by assembly.
[0038]
As shown in FIG. 6, the release lever 26 includes a central main body portion 26a and arm members 26b provided at both ends thereof so as to be orthogonal to the main body portion 26a. Cutout grooves 26c and 26c are formed at both ends of the arm member 26b, respectively. Then, the opening lever 26 is moved relative to the support structure 14 by fitting the hole 27 formed in the center of the main body portion 26a with the pin 24 (see FIG. 4) provided in the lower plate member 14a. A slight rotation is possible. In FIG. 4, reference numerals 28 and 29 denote a flat washer and a split pin for preventing the release lever 26 from coming off.
[0039]
Next, the braking mechanism 25 will be described with reference to FIGS. The braking mechanism 25 is provided in the vicinity of both ends of the beam member 8 symmetrically about the support structure 14. Since the left and right braking mechanisms 25 have the same structure, the one side braking mechanism 25 will be described below as an example.
[0040]
Two eccentric cam rollers 31, 31 are assembled between the two brackets 30, 30 of the braking mechanism 25 welded to the beam member 8. The eccentric cam roller 31 is attached by integrating the eccentric cam roller 31 and the shaft 32 with a key 33 and supporting the shaft 32 on the bracket 30 via the bearings 34 and 34. A retaining ring 35 is attached to one end of each of the shafts 32 and 32 supported by the bracket 30.
[0041]
A support plate 36 (see FIG. 8) described later is inserted between the eccentric cam roller 31 and the eccentric cam roller 31. In order to improve the holding force to the support plate 36 on the opposing circumferential surface of the eccentric cam roller 31, as shown in FIG. 7, knurl processing or claw processing by induction hardening is applied, and the protruding portion 31a is formed. It is desirable to provide.
[0042]
On the other hand, a pair of opposing synchronous gears 37 and 37 are integrally attached to one end of each shaft 32 to which the eccentric cam roller 31 is fixed. Teeth 37a and 37a are formed on the opposing peripheral surfaces of the pair of synchronous gears 37 and 37 by shifting the positions of the teeth by a half pitch, respectively, so that the eccentric cam rollers 31 and 31 rotate synchronously and symmetrically. I am letting. In FIG. 6, what is indicated by reference numeral 38 is a retaining ring for preventing the synchronization gear 37 from coming off, which is attached to the other end of the shafts 32 and 32.
[0043]
Further, on both outer sides of one side surface of the synchronous gears 37, 37, upper pins 39, 39 are respectively attached at positions above the horizontal center line of the shaft 32, and are respectively below at positions below the horizontal center line of the shaft 32. Pins 40 and 40 are attached. The notch grooves 26c and 26c of the arm member 26b provided at both ends of the release lever 26 are slidably engaged with the upper pin 39, respectively.
[0044]
Therefore, when the release lever 26 is urged upward as a whole, the teeth 37a of the synchronous gears 37, 37 rotate downward about the shafts 32, 32, and the eccentric cam rollers 31, 31 The space between them will be opened apart. Since the upper pin 39 moves symmetrically by the engagement of the synchronous gears 37, 37, it also has a function of suppressing the inclination of the release lever 26 itself.
[0045]
Further, between the lower pins 40, 40, the tooth portions 37a of the synchronous gears 37, 37 are pivoted upward with respect to the shafts 32, 32 so that the eccentric cam rollers 31, 31 support the support plate 36. An urging means 41 such as a coil spring is attached so as to be sandwiched from both outer sides.
[0046]
The urging force (attracting force) of the urging means 41 is assumed to be smaller than the urging force that urges the release lever 26 upward due to the weight of the transporter 10, the fork beam 6, and the like. In FIG. 6, reference numerals 42 and 43 denote a front cover and a rear cover that protect the braking mechanism 25.
[0047]
Next, attachment of the support plate 36 will be described with reference to FIGS. The support plate 36 is provided corresponding to the braking mechanisms 25, 25, and the support plate brackets 44, 44 welded to the support beam 5 that connects the upper portions between the guide rails 4, 4, and the base member 3. Are supported between support plate holders 45 and 45 welded to each other. The support plate 36 is formed of a rigid member such as a flat steel that is configured separately from the main body frame.
[0048]
An upper end portion 36 a of the support plate 36 is attached to the support plate bracket 44 via a pin 46, and a lower end portion 36 b is attached to a pin 47 provided on the support plate holder 45. In FIG. 8, the reference numeral 48 indicates a split pin for preventing the pin 46 from being attached to the pin 46, and the reference numeral 49 indicates a support plate 36 attached to the pin 47 of the support plate holder 45. This is a snap pin for preventing slipping out. The intermediate body portion 36c of the support plate 36 is inserted between the eccentric cam rollers 31, 31 of the braking mechanism 25 as described above.
[0049]
Next, the release device 50 that operates when the transporter 10 and the beam member 8 are stopped at the lowermost position will be described with reference to FIGS. The release device 50 is welded to the base member 3 so that the gap 22 between the upper surface of the beam material 8 and the lower surface of the plate material 14b is about 1.5 cm when the transporter 10 and the beam material 8 are stopped at the lowermost position. (See also FIG. 5). The lower surface of the lower plate member 14a of the support structure 14 is in contact with the upper surface of the release device 50, and the lower limit stop position of the support structure 14 is restricted.
[0050]
This relationship will be described in detail with reference to FIG. 1. When the transporter 10 and the beam member 8 are stopped at the lowermost position, that is, the lower surface of the end portion (not shown) of the transporter 10 comes into contact with the floor surface 2. When the horizontal portion 6a comes into contact with the loading stage 3a, the transporter 10 and the beam member 8 are stopped at the lowermost position.
[0051]
  At the same time, the energization of the hoisting device 11 is released by the action of a limit switch (not shown), but there is a slight gap (2.5) between the lower plate material 14a of the support structure 14 and the upper surface of the releasing device 50. Therefore, only the support structure 14 is slightly slid down due to its own weight, and the lower surface of the plate member 14a comes into contact with the upper surface of the release device 50. As a result, the distance between the upper surface of the beam member 8 and the lower surface of the plate member 14b is about 1.5 cm.GapAnd between the upper surface of the bracket 20 attached to the lower part of the plate material 14a and the lower surface of the beam material 8 is about 1 cm.GapAre formed (see also FIG. 5). In this way, the release device 50 regulates the lower limit stop position of the support structure 14, so that the support structure 14 does not lower any more, and the release lever 26 does not descend any more, so the eccentric cam The state where the rollers 31, 31 are opened is maintained.
[0052]
The operation of the fall prevention device for a transporter configured as described above will be described. After the automobile 9 has entered the transporter 10, when the hoisting device 11 is energized, the hoisting support 12 is taken up, and through the sheave 13 attached to the hanging part of the hoisting support 12. The support structure 14 is lifted.
[0053]
  At this time, the gap between the upper surface of the bracket 20 attached to the lower part of the plate member 14a of the support structure 14 and the lower surface of the beam member 8 is about 1 cm as described above.GapIs formed, so thatGapOnly the support structure 14 is lifted upward by this amount. Then, after the upper surface of the bracket 20 and the lower surface of the beam member 8 are in contact with each other, the fork beam 6 and the transporter 10 are wound up.
[0054]
  Until the support structure 14 and the beam member 8 come into contact with each other, the release lever 26 attached to the support structure 14 is also about 1 cm from the beam member 8.GapIt will move up by the minute. As a result, the upper pin 39 of the synchronous gear 37 slidably engaged with the notch grooves 26c provided at both ends of the release lever 26 is also pivoted upward about the shaft 32 as shown in FIG. Be forced.
[0055]
At this time, the urging force of the urging means 41 (the force that pulls the lower pins 40, 40 of the synchronous gears 37, 37) is greater than the urging force that urges the release lever 26 upward by the weight of the carrier 10, the fork beam 6, etc. Since the distance between the lower pins 40 and 40 holding the biasing means 41 is widened, the synchronous gears 37 and 37 are rotated against the biasing means 41.
[0056]
Due to the rotation of the synchronous gears 37, 37, the eccentric cam rollers 31 face each other with a short radius, the interval between the eccentric cam rollers 31, 31 is widened, and a gap is created between the eccentric cam rollers 31, 31 and the open state is established. The carrier 10 is in a state where it can be raised and lowered.
[0057]
In the unlikely event that the hoisting support body 12 is cut during lifting, the force to support the support structure 14 is lost, or the rotating force by the biasing means 41 is larger than the rotating force due to the weight of the lifting part. When the force decreases, the biasing means 41 immediately biases the tooth portions 37a of the synchronous gears 37 and 37 around the shaft 32 as shown in FIG. , 31 are rotated inward (see the arrow of the eccentric cam roller 31 in FIG. 6).
[0058]
At this time, the weight of the sheave 13 and the support structure 14 acts in a direction to push the release lever 26 downward, so that the urging means 41 can assist in the rotation. As a result, the eccentric cam rollers 31 and 31 come into contact with the support plate 36, and a frictional force is generated between the eccentric cam rollers 31 and 31 and the support plate 36 by the force due to the weight of the biasing means 41 and the support structure 14 and the like. Arise.
[0059]
Moreover, since the eccentric cam roller 31 is mounted eccentrically with respect to the shaft 32, the eccentric cam roller 31 has a wedge effect due to this eccentric action, and the eccentric cam rollers 31, 31 have the support plate 36 from both outer sides. It will be pinched securely.
[0060]
At this time, if the protruding portion 31a is formed on the opposing circumferential surface of the eccentric cam roller 31 by knurling or claw processing, the protruding portion 31a further bites into the support plate 36. A large braking force is generated, and the transporter 10 can be stopped and held more reliably. This wedge effect works more strongly as the weight of the automobile 9 on the carrier 10 increases.
[0061]
Further, after the fall prevention device is operated, if the cut hoisting support 12 and the lifting device are repaired and wound up, the fall prevention device can be easily opened and can be used again. Therefore, the automobile 9 on the transporter 10 can be easily lowered.
[0062]
【The invention's effect】
In the first and second aspects of the invention, regardless of whether the carrier is being lifted or stopped, when the hoisting support is cut or an abnormality occurs in the lifting device, the carrier is in any position. However, it can be surely stopped, so that the carrier can be prevented from falling down.
[0063]
  In particular, since the middle part of the release lever for synchronously driving each of the two eccentric cam rollers provided in the braking mechanism provided in the vicinity of both ends of the beam member is rotatably supported with respect to the support structure, The braking mechanisms provided on both sides of the beam material can be operated simultaneously and reliably. As a result, the release lever can reliably operate the brake mechanism even if the installation position of the lifting device is slightly inclined.
Since the two eccentric cam rollers provided in the braking mechanism provided in the vicinity of both ends of the beam member are driven synchronously by the both ends of the release lever, the four eccentric cam rollers are actually operated simultaneously. In case of abnormalityCan immediately prevent the carrier from falling with the minimum sliding distance.The Therefore,Collisions with things under the carrier can be prevented in advance.
[0064]
Furthermore, unlike the conventional method in which a pin is inserted into the locking hole, braking starts immediately, so that the free fall of the transporter hardly occurs and the impact when the transporter stops is small. In addition, since the lifting frame does not require processing such as a locking hole, it can be manufactured at low cost.
[0065]
Then, after the fall prevention device is activated, if the cut hoisting support or lifting device is repaired and wound up, the fall prevention device can be easily opened and can be used again.
[0066]
In particular, in the invention described in claim 2, since the eccentric cam roller acts simultaneously on both sides by the synchronous gear, one-side effect can be prevented and a stable braking force can be obtained. Also, the braking force can be obtained regardless of the magnitude of the load due to the eccentric wedge effect.
[0067]
In the invention described in claim 3, if the protruding portions are formed on the opposing circumferential surfaces of the eccentric cam roller, the holding force to the support plate becomes larger, and the transporter can be stopped and held more reliably. I can do it.
[0068]
In the invention according to claim 4, since the support plate suspended between the support beam and the base member is a rigid member having a configuration different from the main body frame, the support plate can be easily attached or replaced when damaged. I can do it.
[Brief description of the drawings]
FIG. 1 is a front view of a lifting device using a fall prevention device according to the present invention.
FIG. 2 is a view taken along line AA in FIG.
3 is a perspective view of a main part of the fall prevention device of FIG. 1; FIG.
4 is an exploded perspective view of a support structure mounting portion of FIG. 3. FIG.
5 is a longitudinal sectional view of a support structure mounting portion of FIG. 3. FIG.
6 is an exploded perspective view of the braking mechanism portion of FIG. 3. FIG.
7 is a front view of the eccentric cam roller of FIG. 6. FIG.
8 is an exploded perspective view of a support plate portion of FIG. 1. FIG.
FIG. 9 is an explanatory diagram of the opened state of the braking mechanism of FIG. 6;
10 is an explanatory diagram of an operating state of the braking mechanism of FIG. 6. FIG.
[Explanation of symbols]
3 Foundation materials
4 Guide rail
5 Support beam
8 Beam material
10 Carrier
11 Hoisting device
12 Lifting support
14 Support structure
25 Braking mechanism
26 Release lever
31 Eccentric cam roller
31a Protrusion
32 axes
36 Support plate
37 Synchronous gear
39 Upper pin
40 Lower pin
41 Energizing means

Claims (4)

A vertical guide rail is provided between the foundation member and the support beam provided above the foundation member, and a hoisting device for raising and lowering the transporter is provided along the guide rail, and the hoisting device is wound on the hoisting device. The beam material holding the carrier is slidably supported by a support structure suspended via a support for the vehicle, and a braking mechanism is provided near both ends of the beam material, and the support structure is supported by the support structure. An intermediate portion of an opening lever that detects the amount of sliding displacement between the structure and the beam member is rotatably supported, and two eccentric cam rollers provided in the braking mechanism are provided at both ends of the opening lever. tuned so driven, the abnormality, the support plate of another structure a cathodic been the main frame between the base member and the supporting beam, at a provided each two positions of the eccentric cam roller to said brake mechanism, from both outsides Characterized by pinching Fall prevention device of carriage in the lifting device.   The braking mechanism provided in the vicinity of both ends of the beam member is provided symmetrically with respect to the support structure, and two eccentric cam rollers are incorporated in each of the braking mechanisms, and the shaft ends that support the eccentric cam rollers are supported. Is provided with two synchronous gears for synchronously rotating the eccentric cam roller, and the opening for detecting the sliding displacement of the support structure and the beam member is provided between the upper pins provided on the synchronous gear. When both ends of the lever are slidably engaged and the release lever is urged upward, the eccentric cam roller is opened, and the lower pin provided on the synchronous gear is urged 2. A device for preventing a carrier from falling in an elevating device according to claim 1, characterized in that a means is provided to bias the eccentric cam roller in a direction to sandwich the support plate. 3. A device according to claim 1 or 2 , wherein a projecting portion is formed on the opposing circumferential surface of the eccentric cam roller to improve the clamping force to the support plate. The carrier plate in the lifting device according to any one of claims 1 to 3 , wherein the support plate spanned between the support beam and the base member is formed of a rigid member that can be replaced as a separate structure from the main body frame. Fall prevention device.

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