JP2002139105A - Belt tightener using ratchet mechanism - Google Patents

Abstract

PROBLEM TO BE SOLVED: To loosen a belt stepwise in a belt tightener using a ratchet mechanism. SOLUTION: The belt tightener using a ratchet mechanism comprises a structure where a backstopping engaging plate D is provided with pressing plate portions (manual operating portions) 35 and is turnably mounted on a tightener body A so that a manual releasing operation can release engagement with ratchets 16; and ratchet engaging plates C are turnably supported on a winding lever B so that through reversed use, a turning movement of the winding lever B in a winding direction while first pawl portions 21 at one end are engaged with the ratchets 16 turns a winding shaft S in the winding direction, and a turning movement of the winding lever B in an anti-winding direction while second pawl portions 22 at the other end are engaged with the backstopping engaging plate D releases engagement between the backstopping engaging plate D and the ratchets 16.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a belt fastener having a structure in which a winding shaft is intermittently rotated in one direction using a ratchet mechanism to sequentially wind and tighten a belt.

[0002]

2. Description of the Related Art A belt fastener using a ratchet mechanism has a fastener body and ratchets integrally attached to both ends thereof, and is rotatably supported at one longitudinal end of the fastener body. A take-up shaft, a take-up lever whose base end is rotatably supported by the take-up shaft, and the take-up shaft being integrated in the take-up direction by turning the take-up lever in a standing direction. A ratchet engaging plate attached to the winding lever so that the ratchet can be engaged with and released from the ratchet while being urged in the engaging direction with respect to the ratchet;
When the take-up lever is idle-rotated in the falling direction, the take-up shaft is urged in the engaging direction with respect to the ratchet to prevent the take-up shaft from turning in the reverse take-up direction due to belt tension. A belt provided with an engagement plate for preventing reverse rotation attached to the fastener main body so as to be able to engage and disengage with the ratchet in this state, and as one of such belt fasteners. And Japanese Utility Model Publication No. 1-44836.

[0003] When the belt is fastened, the winding lever in the lying posture is raised by the unidirectional rotation of the ratchet mechanism to rotate the winding shaft by a predetermined angle, and the winding shaft reverses. In a state where the above is prevented, the operation of lowering the winding lever in the upright posture is repeated,
By intermittently rotating the winding shaft, the belt is sequentially wound around the winding shaft to generate a tightening force on the belt.
On the other hand, when the belt is loosened, the belt tightening tool disclosed in the above publication rotates the winding lever to a position beyond the standing position (standing rotation end) of the winding lever during belt winding. In this position, at the same time, the winding lever is engaged and fixed to the fastener main body, and at the same time, the cam portion projecting from the base end of the winding lever causes the reverse rotation preventing engagement plate to retreat, The engagement between this and the ratchet is released, thereby making the winding shaft reversible.

Therefore, in the belt fastener having the above structure, once the engagement between the ratchet and the reverse rotation preventing engagement plate is released, this state is maintained, so that the large tension acting on the belt causes the state to be maintained. The belt wound around the winding shaft is pulled out at a stretch by a predetermined length in a very short time, and the tension of the belt binding the cargo rapidly decreases. As a result, the cargo has collapsed or, in extreme cases, has a problem of falling.

[0005]

SUMMARY OF THE INVENTION An object of the present invention is to provide a belt tightening device utilizing a ratchet mechanism so that the belt can be loosened stepwise.

[0006]

According to a first aspect of the present invention, there is provided a belt fastener using a ratchet mechanism having the above structure, wherein the reverse rotation preventing engagement plate comprises:
A manual operation unit, which is movably attached to the fastener body so that the engagement with the ratchet can be released by a manual release operation, and the ratchet engagement plate is provided by inversion use. When the take-up lever is rotated in the take-up direction with the first claw portion at one end engaged with the ratchet, the take-up shaft is rotated in the take-up direction, and the other end is When the take-up lever is rotated in the anti-winding direction with the second pawl engaged with the reverse rotation preventing engagement plate, the engagement between the reverse rotation prevention engagement plate and the ratchet is released. , And is rotatably supported by the winding lever.

According to the first aspect of the present invention, when the belt is gradually loosened, the take-up lever is positioned at the upright position, and the first pawl of the ratchet engaging plate and the ratchet are kept engaged. Keep it. In this state, with one hand applying a force to the manual operation portion of the reverse rotation preventing engagement plate to release the engagement between the reverse rotation preventing engagement plate and the ratchet, use the other hand to pull the tension of the tension side belt. By rotating the winding lever in the falling direction while applying a force in the rising direction to the winding lever against the force for rotating the winding lever in the falling direction, When the force applied to the manual operation unit is released while checking the status of the bound cargo, the reverse rotation prevention engagement plate and the ratchet re-engage,
The cargo is fixed. By repeating the above operation as many times as necessary, the tension acting on the belt can be reduced stepwise.

Further, as in the prior art, when it is desired to loosen the belt at a stretch in a short time, the take-up lever is rotated in the falling direction with the ratchet engaging plate supported by the take-up lever being inverted. Then, the second pawl portion of the ratchet engagement plate is engaged with the reverse rotation prevention engagement plate, and the reverse rotation prevention engagement plate is moved. As a result, the engagement between the ratchet and the reverse rotation preventing engagement plate is released, and furthermore, this disengaged state is maintained, so that the belt wound on the winding shaft is pulled out in a short time. , The tension of the belt loosens at a stretch.

Further, the invention according to claim 2 is based on the premise of the invention according to claim 1, wherein the reverse rotation preventing engagement plate is rotatably supported with respect to the fastener main body. Regardless of the operation in which the take-up lever is turned down, the ratchet can be engaged with the reverse rotation preventing engagement plate only by applying a pressing force to the position farthest from the rotation fulcrum of the reverse rotation preventing engagement plate. Since the disengagement can be performed, there is an advantage that the disengagement operation is facilitated, and the mechanism of engagement of the reverse rotation preventing engagement plate with the ratchet and the mechanism for releasing the engagement are simplified.

[0010] The invention of claim 3 is based on claim 1 or 2.
The second claw portion provided on the ratchet engaging plate is made engageable with an engaging hole provided on the reverse rotation preventing engaging plate. Since the protruding claw portions are engaged with each other, the engagement between the two is ensured, and the engagement release operation performed by lowering the winding lever is eliminated.

According to a fourth aspect of the present invention, on the premise of any one of the first to third aspects, the fastener body and the winding lever are engaged with a reverse rotation preventing engagement plate and a ratchet. In the state where is released, there is provided a rotation position regulating member for preventing the winding lever from further rotating beyond the standing position at the time of belt winding, and in the state, In addition, the winding lever can be prevented from becoming free.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in more detail with reference to examples. FIG. 1 is an overall perspective view of a belt fastener according to the present invention, FIG. 2 is an exploded perspective view thereof, FIG. 3 is a perspective view of a fastener body A, and FIG. FIG. 5 is an exploded perspective view of the taking lever B and a pair of ratchet engaging plates C, and FIG. 5 is a perspective view of a reverse rotation preventing engaging plate D;
FIG. 6 is a cross-sectional plan view of the winding lever B at the falling position, and FIG. 7 is a side cross-sectional view of the same. The belt fastener according to the present invention includes a fastener main body A and a winding lever B rotatably supported via a winding shaft S at one longitudinal end of the fastener main body A. Have.

As shown in FIGS. 3, 6, and 7, the fastener body A has side plates 2 integrally provided on both sides of a bottom plate 1, and one end of each side plate 2 in the longitudinal direction. The (front end) is formed in a substantially ring shape, and the hole of the ring portion 2a is the bearing hole 3 of the winding shaft S. A support hole 4 of a fulcrum shaft 39 for rotatably supporting a later-described anti-reverse engagement plate D to the fastener body A is provided at a central portion in the longitudinal direction of each side plate portion 2. the longitudinal end portions of 2 (the rear end), wrapping the rod 5 for fixing wound is fixed along the width direction of the fixed-side belt V _2. At the center of the bottom plate 1 in the width direction, an engagement plate D for preventing reverse rotation is provided.
The spring support portion 7 that supports the compression spring 41 that urges the spring in the engagement direction is provided upright.

As shown in FIGS. 4, 6 and 7, the take-up lever B has a rear end portion of each side plate portion 8 which is arranged in parallel at a predetermined interval, and is connected to the connection plate portion 9. The front end of each side plate 8 is integrally formed with the operation shaft 11, and the front end of each side plate 8 is formed in a substantially ring shape, and the hole of the ring 8a is the bearing hole 12 of the winding shaft S. . Further, the ring portion 8a
When the winding lever B is erected with respect to the fastener body A, a stepped shape is formed on the lower surface side of the outer periphery of the lower surface to abut against the lower surface of the reverse rotation preventing engaging plate D to regulate the rising end thereof. Is provided along the radial direction. A ratchet engagement plate C is arranged outside each side plate portion 8 of the winding lever B, and is integrally attached to a protruding end portion of a support shaft 14 rotatably supported between the side plate portions 8. ing.

As shown in FIGS. 1 to 7, the winding shaft S is composed of a pair of split shaft members 15 having a split cross section, and the pair of split shaft members 15 are provided at both ends. They are assembled together by a pair of ratchets 16 fitted. That is, the ratchet 16 is formed with a pair of assembling holes 16 a having a shape corresponding to the cross section of the split shaft 15, and the pair of assembling holes 16 a is provided with the pair of split shafts 15.
Are fitted to each other to form a pair of split shafts 1.
5 is assembled integrally by a pair of ratchets 16.

Further, the winding lever B is connected to the winding shaft S
, So as to be rotatable with respect to the fastener main body A, and therefore, this assembling structure will be described. Outside the ring portion 2a at the tip of each side plate portion 2 of the fastener body A,
The ring portions 8a at the end of each side plate portion 8 of the take-up lever B are arranged with their outer peripheral parts partially overlapping each other, and the respective bearing holes 3 provided in the ring portions 2a, 8a are provided.
12, a pair of split shafts 15 are inserted, and both protruding ends of the pair of split shafts 15 are respectively inserted into mounting holes 16 a of the ratchet 16. Further, the mounting holes 16 a are formed outside the ratchets 16. With the washer 17 provided, the ratchet 16 and the washer 17 are prevented from coming off by the stop pins 18 inserted in both ends of the pair of split shaft members 15 in the radial direction. For this reason, the winding lever B
Is rotatably connected to the distal end portion of the fastener body A via the winding shaft S, and is integrally connected thereto. Ratchets 16 are respectively disposed outside the respective side plate portions 8 of the winding lever B. The configuration is as follows.

Further, the ratchet engaging plate C disposed outside each side plate portion 8 of the winding lever B is shown in FIGS.
As shown in FIG. 2, a first claw portion 21 engageable with the ratchet 16 is provided at one end portion in the longitudinal direction, and an engagement hole 36 provided at a reverse rotation prevention engagement plate D is provided at the other end portion.
In this configuration, a second claw portion 22 that can be engaged with is provided. Further, inside one side plate portion 8 of the winding lever B,
A box main body 23 for urging the first claw portion 21 of the ratchet engaging plate C in the engaging direction with respect to the ratchet 16 is provided. That is, as shown in FIG.
The support shaft 14, which integrally mounts the ratchet engaging plate C at both ends, is inserted through the through hole 23a provided in the through hole 23a. A V-shaped engagement groove 26 is provided in a portion of the support shaft 14 inserted through the box body 23, and the engagement ball 27 provided in the box body 23 is compressed by the action of a compression spring 28. It is engaged with the engagement groove 26. For this reason, as shown in FIG. 10A, when the first claw portion 21 of the ratchet engaging plate C is in a state capable of engaging with the ratchet 16, the ratchet engaging plate C is attached to the compression spring 28. Is always urged in the engagement direction within a predetermined angle range to ensure the engagement, and
As shown at 0 (b), when the ratchet engaging plate C is inverted (turned clockwise by a predetermined angle in FIG. 10 (a)), the engaging ball 26 is moved from the engaging groove 26 of the support shaft 14 to the engaging ball 27. , And the urging force of the compression spring 28 does not work.

As shown in FIGS. 2 and 5, a pair of left and right engaging claws 31 is provided at the inner end of the engaging plate D for preventing reverse rotation. The connecting plate 32 which is substantially perpendicular to the connecting plate 31 is integrally connected to the supporting plate 33 at both ends of the connecting plate 32 toward the front.
The support plate 33 is provided with a support hole 34, and the outer end of each engagement claw 31 is disengaged from the ratchet 16 and each engagement claw 31. There, at the time loosening the stepwise belt V _1, the pressing plate portion 35 is pressed by a human is configured integrally provided toward the rear. An engagement hole 36 for engaging the second claw 22 of the ratchet engagement plate C is provided in the pair of left and right engagement claws 31. Spring 41
A spring hooking portion 37 for hooking is provided downward. In addition, a reinforcing plate portion 38 extending outward is bent downward on each flat engaging claw portion 31 to reinforce the engaging claw portion 31.

As shown in FIG. 1, FIG. 2, FIG. 6, and FIG. 7, the reverse rotation preventing engagement plate D is disposed between the side plate portions 2 of the fastener body A to support the same. A fulcrum shaft 39 is inserted into a bearing hole 34 provided in the plate portion 33, and is tightened through the fulcrum shaft 39 so that the engagement claw portion 31 and the ratchet 16 can be engaged and released. Each side plate portion 2 of the attachment body A is rotatably supported by each side plate portion 2. Further, a compression spring 41 is elastically mounted between the spring hook portion 37 of the reverse rotation preventing engagement plate D and the spring support portion 7 of the fastener body A.
By the restoring force of 1, the reverse rotation preventing engagement plate D is urged in a direction in which the engagement claw portion 31 and the ratchet 16 are engaged. As shown in FIG. 6, the reverse rotation preventing engagement plate D is rotated by putting a finger on the pressing plate portion 35 of the reverse rotation preventing engagement plate D, and the engagement claw portion 31 and the ratchet are rotated. When the belt is gradually loosened by rotating the winding lever B in the falling direction in a state where the engagement with the pressing member 16 is released, a finger or the like is interposed between the winding lever B and the pressing plate portion 35. The side plate portion 8 of the winding lever B is inserted into the gap 20 between the side plate portion 2 of the fastener body A and the pressing plate portion 35 in order to prevent the pinching of the lever.

The reverse rotation preventing engagement plate D and the ratchet 1
When the engagement with the belt 6 is released, the winding lever B further rotates beyond the standing position at the time of belt winding and enters a free state. For this reason, as shown in FIG. 4, the rotation position regulating projections 10 are integrally fixed to the opposing inner surfaces of the respective side plate portions 8 of the winding lever B, and the winding lever B is moved when the belt is wound. When it is rotated beyond the standing position, as shown in FIG. 8, the end surface of the rotation position regulating projection 10 comes into contact with a stopper portion 2b provided in a step shape on the outer peripheral portion of the ring portion 2a. In contact therewith, the rotational position of the winding lever B when the ratchet 16 is released from the reverse rotation prevention is restricted.

[0021] When tightening the cargo compound that is stacked on the track by the belt, as shown in FIG. 7, the belt V ₁ of the tension side has one end, each of the division of the winding shaft S While being inserted into the gap between the shafts 15, it is wound around the winding shaft S, and
One end of ₂ is fixed in a wound state to a winding rod 5 provided at the rear end of the fastener body A. The other end of each of the belts V ₁ and V ₂ on the tension side and the fixed side is fixed to a truck bed.

In the above state, the first pawl portion 21 of each ratchet engaging plate C attached to the take-up lever B is engaged with the ratchet 16 to move the take-up lever B to the lying position (FIG. 7).
When the take-up lever B is in the upright operation, the ratchet is prevented from rotating in the reverse direction by the reverse rotation preventing engagement plate D when the winding lever B is raised. 7, the take-up shaft S rotates integrally with the take-up lever B in the direction of the arrow P, as shown in FIG.
₁ is wound by a predetermined length, and the ratchet 16 is not rotated when the winding lever B is laid down, so that the winding shaft S is not rotated and only the winding lever B is empty. Rotate. The above operation of the belt fastening device is exactly the same as the conventional _one , and the above operation is repeated until the belts (indicating the belts V ₁ and V ₂ on both the tension side and the fixed side) have a predetermined tension. The rotation angle of the take-up lever B during the belt take-up is about 130 ° as shown in FIG. 8, and the take-up lever B rotates beyond the maximum erecting angle of 90 °. Although it is possible, this state of the maximum rotation angle is referred to as “standing position (or standing posture)”.

On the other hand, in a state where tension is acting on the belt, the following operation is performed to gradually reduce the tension. That is, as shown in FIG. 9, in a state where the winding lever B in the lying posture is turned upright and the first claw portion 21 of the ratchet engaging plate C and the ratchet 16 are kept engaged. deep. Then, as shown in the figure, in the state, by a manual operation, by applying a force F ₁ to the pressing plate portion 35 of the reverse rotation preventing engagement plate D, the side of the bottom plate 1 of which the fastener body A , The whole of the reverse rotation preventing engagement plate D rotates clockwise about the fulcrum shaft 39, so that the engagement claw portion 31 and the ratchet 16 are rotated.
Is disengaged. In this state, the tension acting on the tensile side belt V _1, against the force of the winding lever B is rotated in the lodging direction, rotates it in the standing direction with respect to the take-preparative lever B While applying force F ₂ , the take-up lever B is manually rotated in the direction of arrow P ′ (downward direction) to check the status of the cargo bound by the belt, When the pressure is released and the reverse rotation preventing engagement plate D is released, the engagement claw portion 31 and the ratchet 16 are engaged again by the restoring force of the compression spring 41, and the cargo is fixed. Then, when the above operation is repeated a required number of times, the tension acting on the belt can be reduced in a stepwise manner, so that problems such as collapse of the cargo or falling of the cargo can be prevented.

Further, there is no fear of collapse of cargoes, etc.
When it is desired to loosen the belt tension at a stretch, as shown in FIG. 11, the ratchet engaging plate C is reversed while the winding lever B is at the standing position or in the vicinity thereof, and the engaging plate C The engagement between the first claw 21 and the ratchet 16 is released, and in this state, the winding lever B is rotated in the falling direction. And, as shown by a two-dot chain line in FIG.
After the second claw portion 22 of the ratchet engagement plate C in the inverted posture comes into contact with the upper surface of the engagement claw portion 31 of the reverse rotation prevention engagement plate D,
The second claw portion 22 slides rearward on the upper surface of the engagement claw portion 31 to form an engagement hole 36 provided in the second claw portion 22.
When the take-up lever B is turned down, the whole of the reverse rotation preventing engagement plate D is opposed to the restoring force of the compression spring 41, as shown in FIG. 12, the engagement pawl 31 is disengaged from the ratchet 16 about the fulcrum shaft 39 in the clockwise direction in FIG.
Thus, by the tension acting on the tensile side belt V _1, is pulled the belt V ₂ which is wound on the winding shaft S, the tension of the entire belt, rapidly decreases (Belt Relax at once).

In the above-described embodiment, the second claw portion 22 provided on the ratchet engaging plate C is inserted into the engaging hole 36 provided on the reverse rotation preventing engaging plate D to engage the two. Although it is ensured, a protrusion,
It is also possible to provide a notch or the like and engage them with the second claw 22 of the ratchet engagement plate C.

Further, in the above embodiment, the reverse rotation preventing engagement plate is supported on the fastener main body A so as to be rotatable manually or by the pressing force of the winding lever. May be converted into a linear movement, and the reverse rotation preventing engagement plate is retracted with respect to the ratchet to release the engagement between them.

[0027]

According to the present invention, in a belt tightening tool utilizing a ratchet mechanism, a belt is tightened by engaging a ratchet and manually operating a reverse rotation preventing engagement plate for preventing reverse rotation thereof. Can be loosened in motion. As a result, while checking the status of the cargoes, the tension of the belt that binds the cargoes can be reduced in a stepwise manner. Load collapse, falling, etc. can be prevented.

[Brief description of the drawings]

FIG. 1 is an overall perspective view of a belt fastener according to the present invention.

FIG. 2 is an exploded perspective view of the same.

FIG. 3 is a perspective view of a fastener main body A;

FIG. 4 is an exploded perspective view of a winding lever B and a pair of ratchet engaging plates C.

FIG. 5 is a perspective view of a reverse rotation preventing engagement plate D;

FIG. 6 is a cross-sectional plan view of the winding lever B at a falling position.

FIG. 7 is a side sectional view of the same.

FIG. 8 is a side cross-sectional view of the winding lever B in a standing position.

FIG. 9 is a side cross-sectional view showing a state in which the winding lever B is manually rotated in the falling direction and the belt is gradually loosened.

FIG. 10A shows a first claw portion 2 of the ratchet engagement plate C;
It is sectional drawing which shows the effect | action of the compression spring 28 in the state which 1 has engaged with the ratchet 16, and (b) is sectional drawing which shows the state in which the ratchet engaging plate C was inverted and the compression spring 28 does not act. is there.

FIG. 11 shows the inverted second pawl 2 of the ratchet engaging plate C;
FIG. 4 is a side cross-sectional view showing a state in which 2 is dropped into and engaged with an engagement hole 36 of a reverse rotation prevention engagement plate D.

FIG. 12 is a side cross-sectional view showing a state in which the reverse rotation preventing engagement plate D rotates against the restoring force of the compression spring 41 and the engagement between the engagement plate D and the ratchet 16 is released.

[Explanation of symbols]

A: the fastener body B: winding lever C: ratchet engaging plate D: engaging reverse rotation preventing plywood S: take-up shaft V _1: tensile side belt V _2: fixed side of the belt 2a: the fastener body of the ring Portion (rotational position regulating member) 10: Rotational position regulating protrusion (rotational position regulating member) 16: Ratchet 21: First claw portion of ratchet engagement plate 22: Second claw portion of ratchet engagement plate 35: Reverse rotation prevention Pressing plate portion of engagement plate (manual operation portion) 36: engagement hole

Claims (4)

[Claims] 1. A fastener main body, a take-up shaft having ratchets integrally attached to both ends thereof, and a rotatable shaft rotatably supported at one longitudinal end of the fastener main body. A take-up lever whose base end is rotatably supported; and a take-up lever that pivots in the upright direction to rotate the take-up shaft integrally in the take-up direction with respect to the ratchet. When the ratchet engaging plate attached to the take-up lever so that the ratchet can be engaged with and released from the ratchet while being urged in the mating direction, and the take-up lever is idle-rotated in the falling direction, In order to prevent the winding shaft from rotating in the anti-winding direction due to belt tension, engagement with the ratchet and release of the ratchet in a state of being urged in the engaging direction with respect to the ratchet are performed. A reverse rotation preventing engagement plate attached to the fastener main body as possible. A belt fastener, wherein the reverse rotation preventing engagement plate includes a manual operation part, and is movable to the fastener main body so that engagement with the ratchet can be released by a manual release operation. When the take-up lever is turned in the upright direction while the first pawl at one end of the ratchet engagement plate is engaged with the ratchet, the take-up shaft is wound. When the take-up lever is turned in the falling direction while being rotated in the take-up direction and the second claw portion at the other end is engaged with the reverse-rotation preventing engagement plate, A belt fastener using a ratchet mechanism, which is rotatably supported by the take-up lever so that engagement between the ratchet and the ratchet is released. 2. The belt fastener according to claim 1, wherein the reverse rotation preventing engagement plate is rotatably supported by the fastener body. 3. A second device provided on the ratchet engaging plate.
The belt fastener using a ratchet mechanism according to claim 1 or 2, wherein the claw portion is engageable with an engagement hole provided in the reverse rotation prevention engagement plate. 4. When the engagement between the reverse rotation preventing engagement plate and the ratchet is released, the take-up lever exceeds the standing position at the time of belt take-up in the fastener body and the take-up lever. A belt tightening device using a ratchet mechanism according to any one of claims 1 to 3, further comprising a rotation position restricting member for preventing further rotation.