JP4106563B2 - Packing box side panel locking device - Google Patents

Description

  The present invention relates to an improvement of a locking device for a side panel of a cargo box of a truck, a trailer or a container.

  2. Description of the Related Art Conventionally, a detachable load box such as a fixed load box or a container of a truck or a trailer has been used in which a side panel can be flipped up and opened (see, for example, Patent Documents 1 and 2).

JP-A-8-169239 (Claim 1 and FIG. 1) JP 2001-213497 A ([Claim 1], [FIG. 1])

  Now, the conventional locking device for the side panel of the packing box has the following structure. The lock device 30 includes a lock arm 32 and a clamp 34 shown in FIG. The lock arm 32 is pivotally supported by a bracket 36 fixed in the vicinity of the lower end portion of the side panel 26 (slightly above the lower end portion) via a rotary shaft 38 that extends horizontally in the longitudinal direction of the vehicle body. Protrudes from the lower end of the side panel 26. Then, the tip 32a is pressed against and locked by the load carrier floor frame 28 by a clamp 34 attached to the load carrier floor frame 28 in the illustrated example, which is a separate component of the load box from the side panel 26. ing.

Further, as shown in FIG. 11 and FIG. 12A, a two-sided width 38 a is formed on the rotation shaft 38 of the lock arm 32 constituting the lock device 30. On the other hand, the shaft hole 42 formed on the parallel plate 40 of the bracket 36 for supporting the rotating shaft 38 is formed with a circular portion 42a and a long hole portion 42b extending downward from the circular portion 42a. The long hole portion 42 b is for restricting the rotation of the rotation shaft 38 by matching the two-surface width 38 a of the rotation shaft 38. When the side panel 26 is locked, as shown by a solid line in FIG. 11, with the lock arm 32 protruding downward, the two-sided width 38a of the rotary shaft 38 is fitted into the elongated hole portion 42b, and the backlash is reduced. It becomes a state without. Then, the distal end portion 32 a of the lock arm 32 is pressed against the cargo bed floor frame 28 by the clamp 34, and the side panel 26 is firmly fixed to the cargo bed floor frame 28.
On the other hand, when the side panel 26 is opened, the lock arm 32 is pulled up so that the two-face width 38a of the rotation shaft 38 of the lock arm 32 is disengaged from the elongated hole portion 42b of the shaft hole 42, and the circular portion 42a of the shaft hole 42 is obtained. The rotating shaft 38 is rotated in this direction, and the lock arm 32 is directed upward. Then, as shown by a two-dot chain line in FIG. 11 (a), the lock arm 32 is lowered downward so that the two-surface width 32a of the rotating shaft 38 fits again into the elongated hole portion 42b of the shaft hole 42, thereby locking. The rotation of the arm 32 is restricted in a state of facing upward. Therefore, rattling of the lock arm 32 when the side panel 26 is opened and closed is prevented, and usability of the lock device 30 is improved.

On the other hand, the clamp 34 for pressing the tip end portion 32a of the lock arm 32 against the cargo bed floor frame 28 is rotated by the clamp pad 44 in the direction indicated by the arrow A as shown in FIG. Lock and unlock. Here, the arm plate 46 that pivotally supports the clamp pad 44 is fixed to the grip 48. The grip 48 is pivotally attached to the base 52 via the link 50.
The link 50 is rotated in the direction of arrow B about the rotation shaft 54 that pivotally attaches the link 50 and the base 52, and the grip 48 is centered on the rotation shaft 56 that pivotally attaches the grip 48 and the link 50. By rotating the arm plate 26 in the direction of arrow C, the clamp pad 44 can be rotated in the direction of arrow A. The grip 48 is provided with a trigger 58, and the operator can disconnect the trigger 58 from the lock pin 60 and lock and unlock the lock arm 32 by grasping the trigger 58. It becomes possible.

Incidentally, the following problems have been pointed out in the conventional locking device 30. For example, when an excessive force in the opening direction of the side panel 26 is applied to the lock device 30 for some reason during traveling of a truck or trailer, the force is applied to the rotation shaft 38 and the shaft hole 42 of the lock arm 32. Concentrating, the rotating shaft 38 and the shaft hole 42 may be deformed, and the lock and unlock operations may not be possible. Accordingly, conventionally, it is necessary to sufficiently secure the diameter and thickness of the rotating shaft 38 and the shaft hole 42 in order to sufficiently increase the strength, which causes an increase in component cost and an increase in component weight. It was.
The present invention has been made in view of the above problems, and its object is to reliably prevent deformation of the side panel of the packing box without increasing the cost or increasing the weight of the locking device. In order to further improve the durability of the locking device.

Means for Solving the Problem The means according to the present invention is a locking device for a side panel of a cargo box that is flipped up and opened, and a rotating shaft that extends horizontally in the longitudinal direction of the vehicle body at the lower end of the side panel. A lock arm that is pivotally supported via the front end of the side panel, and a front end of the lock arm that protrudes from the lower end of the side panel when the side panel is closed, A clamp for pressing against a component of the packing box separate from the side panel, and the distal end of the lock arm is released to the side panel while being pressed against the component of the packing box by the clamp When the direction force is applied, the rotation axis of the lock arm is pivotally supported so that the middle part of the lock arm can come into contact with the lower end of the side panel. It is characterized in.
According to the present invention, even if an excessive force in the opening direction of the side panel is applied to the locking device, the force is locked without being concentrated on the rotation shaft and the shaft hole of the lock arm. It can also be dispersed in the contact portion between the intermediate portion of the arm and the lower end portion of the side panel. Then, the force can be received at a plurality of points, and deformation of the rotation shaft and the shaft hole of the lock arm can be prevented.

In the present invention, the rotation shaft is fixed to a base end portion of the lock arm, and a shaft hole with which the rotation shaft engages is provided in a bracket fixed in the vicinity of a lower end portion of the side panel. And a predetermined distance.
With this configuration, the lock arm is pivotally supported with a slight clearance with respect to the side panel at the rotation shaft portion, and the tip of the lock arm is pressed against the component of the cargo box by the clamp, A slight gap is also formed between the lock arm and the end of the side panel (that is, the predetermined distance between the side panel and the shaft hole is pressed against the components of the cargo box by the clamp, This is the distance necessary to secure a slight gap between the front edge of the panel.) When an excessive force in the opening direction of the side panel is applied to the locking device, the lower end portion of the side panel is displaced toward the outside of the packing box. Then, the intermediate part of the lock arm and the lower end part of the side panel come into contact with each other, and it becomes possible to receive force at a plurality of points as described above.

Further, in the above invention, the rotation shaft has a columnar shape or a cylindrical shape, and the cross-sectional shape of the shaft hole is a long oval shape in the vertical direction of the side panel. The lock arm is pivoted up and down and rotated at the top dead center in a range in which the lock arm can be moved up and down, and the lock arm is moved up and down with the tip thereof directed upward of the side panel. It is desirable to provide a rotation stop means for restricting the rotation of the lock arm by moving it to the bottom dead center in a movable range.
With this configuration, when the side panel is closed, the lock arm is locked by the clamp with the tip of the lock arm protruding from the lower end of the side panel. On the other hand, when the side panel is opened, rotation is restricted with the lock arm facing upward, and rattling of the lock arm when the side panel is opened and closed is prevented, thereby improving the usability of the locking device.

Further, as an example of the present invention, the anti-rotation means has a top dead center in a state where the tip end portion of the lock arm faces the upper side of the side panel and the lock arm can move at least up and down. The lock arm is not in contact with the contacted portion located in the vicinity of the rotation axis of the lock arm, the tip end of the lock arm is directed upward of the side panel, and the lock arm is It is good also as providing the stopper member which contact | abuts to the said to-be-contacted part when it exists in the bottom dead center at least in the range which can move up and down.
According to this configuration, when the distal end portion of the lock arm is directed upward of the side panel and the lock arm is at least at the top dead center in the range in which the lock arm can move up and down, the stopper member is The lock arm can be rotated because it does not abut against the abutted portion located in the vicinity of the rotation axis. On the other hand, when the tip of the lock arm is directed upward from the side panel and when the lock arm is at least at the bottom dead center within the range in which the lock arm can move up and down, the stopper member is located near the rotation axis of the lock arm. By abutting against the abutted portion that is positioned, the rotation of the lock arm is restricted while facing upward.

  The abutted portion in the vicinity of the rotation axis of the lock arm may form a part of the lock arm, and the abutted portion in the vicinity of the rotation axis of the lock arm is a separate member from the lock arm. It is good also as what is fixed to a lock arm. Furthermore, the stopper member may be fixed to the bracket.

  Since the present invention is configured as described above, the deformation of the side panel of the packing box can be surely prevented without increasing the cost and weight of the locking device, and the durability of the locking device can be further improved. Can be achieved.

  The best mode for carrying out the present invention will be described below with reference to the accompanying drawings. Note that the same or corresponding parts as those in the prior art are denoted by the same reference numerals, and detailed description thereof is omitted.

  FIG. 1 shows a lock arm 32 and a bracket 36 that pivotally supports the lock arm 32 constituting the lock device for the side panel of the cargo box according to the embodiment of the present invention. The rotation shaft 62 provided at the base end portion of the lock arm 32 has a simple cylindrical shape. Further, the shaft hole 64 formed in the parallel plate 40 of the bracket 36 has an oblong shape with a certain width extending in the vertical direction, and is formed at a predetermined distance from the side panel. The lock arm 32 is pivotally supported so as to be movable in the vertical direction, and the rotation shaft 62 is rotatable with respect to the shaft hole 64 regardless of the position of the rotation hole 62 in the shaft hole 64. ing.

Further, a stopper member 66 is fixed to the bracket 36. This stopper member 66 is in a state where the tip end portion 32a of the lock arm 32 is directed upward as shown by a two-dot chain line in FIG. 1B, and the lock arm 32 is at the lower end portion of the shaft hole 64. In some cases, it may be anything that abuts against the abutted portion 32b of the lock arm 32. In the example of FIG. 1, the stopper member 66 is a rib fixed to the parallel plate 40 of the bracket 36. In the example of FIG. 1, the abutted portion 32 b is formed by slightly extending the base end portion of the lock arm 32 toward the opposite side of the distal end portion 32 a with the rotation shaft 62 interposed therebetween. Therefore, the abutted portion 32 b forms a part of the lock arm 32. The stopper member 66 and the contacted portion 32b of the lock arm 32 constitute a rotation stop means for restricting the rotation of the lock arm 32.
In addition, about the clamp which comprises the lock apparatus 30 (refer FIG. 10) which concerns on embodiment of this invention with the lock arm 32, since the conventional clamp apparatus 34 (refer FIG. 13) can be used as it is, detailed description Is omitted.

  Here, based on FIGS. 2-4, the operation procedure of the lock arm 32 of the locking device based on Embodiment of this invention is demonstrated. First, FIG. 2 shows that the front end portion 32a of the lock arm 32 protrudes from the lower end portion of the side panel 26 when the side panel 26 (see FIG. 10) is closed, and is loaded by the clamp 34 (see FIGS. 10 and 13). The lock arm 32 is shown in a state where it is pressed against the lock 28 (see FIG. 10) and locked. At this time, the rotation shaft 62 provided at the base end portion of the lock arm 32 is located at the lower end portion of the shaft hole 64, and thus the lock arm 32 is located at the bottom dead center within the range in which the lock arm 32 can move up and down.

Next, FIG. 3 shows a state in which the lock arm 32 is pulled up to the top dead center in a range in which the lock arm 32 can move up and down, and the rotary shaft 62 provided at the base end portion of the lock arm 32 is positioned at the upper end portion of the shaft hole 64. Thus, the lock arm 32 is rotated, and the tip 32a is directed upward. As described above, since the shaft hole 64 has an oval shape with a constant width, the vertical movement of the lock arm 32 and the rotation of the lock arm 32 are not hindered. Next, FIG. 4 shows the state of the lock arm 32 by lowering the lock arm to the bottom dead center where the lock arm 32 can move up and down from the state in which the tip 32a of the lock arm 32 shown in FIG. The rotation shaft 62 provided in the base end part has shown the state located in the lower end part of the shaft hole 64 again. In this state, the abutted portion 32 b provided at the base end portion of the lock arm 32 abuts on the stopper member 66 fixed to the bracket 36, and the rotation of the lock arm 32 is restricted.
The operation for returning from the state shown in FIG. 4 to the state shown in FIG. 2 is the reverse of the above procedure.

  According to the embodiment of the present invention configured as described above, the following operational effects can be obtained. First, since the rotation shaft 62 is rotatable with respect to the shaft hole 64 regardless of the position of the rotation shaft 62 in the shaft hole 64, as shown in FIG. Even in the locked state in which the tip portion is pressed against the cargo bed floor frame 28 by the clamp 34, the rotary shaft 62 can rotate with respect to the shaft hole 64. Therefore, when a force in the opening direction is applied to the side panel 26, from the state shown in FIG. 5 (a), as shown in FIG. 5 (b), the middle part of the lock arm 32 is connected to the lower end part of the side panel 26, It will be in the state contact | abutted in the position shown with the code | symbol P. FIG. In this contact state, the rotation of the lock arm 32 is restricted for the first time. Therefore, even if an excessive force in the opening direction of the side panel 26 is applied to the lock arm 32, the force is not concentrated on the rotation shaft 62 and the shaft hole 64 of the lock arm 32, and the force is concentrated. It can also be dispersed in the contact portion P between the intermediate portion of the lock arm 32 and the lower end portion of the side panel 26. That is, according to the embodiment of the present invention, the force can be received at a plurality of points, so that the rotation shaft 62 of the lock arm 32 and the shaft hole 64 can be effectively prevented from being deformed. For this reason, unlike the conventional case, it is not necessary to secure sufficient diameters and thicknesses to sufficiently increase the strength of the rotary shaft 38 and the shaft hole 42, thereby preventing an increase in component cost and an increase in component weight. It becomes possible.

  Further, as shown in FIG. 4, the lock arm 32 has a distal end portion 32a directed upward from the side panel 26 (see FIGS. 5 and 10), and the lock arm 32 can move at least vertically. When the stopper member 66 is in the bottom dead center, the rotation of the lock arm 32 is restricted in a state in which the stopper member 66 is in contact with the contacted portion 32b located in the vicinity of the rotation shaft 62 of the lock arm 32. The Rukoto. On the other hand, as shown in FIG. 3, when the tip 32a of the lock arm 32 faces the upper side of the side panel 26 and the lock arm 32 is at least at the top dead center in the range in which the lock arm 32 can move up and down, the stopper Since the member 66 does not contact the contacted portion 32b of the lock arm 32, the lock arm 32 can be rotated.

  That is, also in the embodiment of the present invention, when the side panel 26 is closed, the front end portion 32a of the lock arm 32 protrudes from the lower end portion of the side panel 26 when the side panel 26 is closed. On the other hand, when the side panel 26 is opened, rotation is restricted with the lock arm 32 facing upward, and rattling of the lock arm 32 when the side panel is opened and closed is prevented, improving the usability of the locking device. Will be. For this reason, an operator who is familiar with the conventional locking device 30 is required to perform the same operation as the conventional one, and the side panel 26 can be easily locked and unlocked.

In FIG. 6, as an application example of the lock device according to the embodiment of the present invention, a rib separate from the lock arm 32 is fixed to the rotation shaft 62 of the lock arm 32 at the proximal end portion of the lock arm 32. Thus, the contacted portion 68 is formed.
Further, in FIG. 7, an extension 62 a is formed at both ends of the lock arm 62, and a contacted portion 70 made of a rib separate from the lock arm 32 is fixed to the extension 62 a, and The example which provided the stopper member 72 in the position corresponding to the to-be-contacted part 70 is shown. Also in these application examples, it is possible to obtain the same operational effects as the example shown in FIG.

Yet another application example is shown in FIG. In this example, a shaft hole 78 for pivotally supporting a rotation shaft 76 provided at the base end portion of the lock arm 74 to a bracket 72 fixed to the lower end portion of the side panel 26 (see FIGS. 5 and 10). A block 80 in which is formed is provided. A gap 80a having a size larger than the thickness of the lock arm 74 is formed between the block 80 and the surface of the bracket 72, and the base end portion 74b of the lock arm 74 is fitted into the gap 80a. The rotation stopping means is configured.
In this example, the shaft hole 78 has an elliptical shape with a constant width extending in the vertical direction, and the rotation shaft 76 is constituted by a cylindrical shaft. On the other hand, the block 80 in which the shaft hole 78 is formed also serves as the stopper member 66, and an independent stopper member is not fixed to the bracket 72 like the stopper member 66 of FIG. 1. Moreover, the base end portion 74b of the lock arm itself performs the same function as the contacted portion 32b in FIG. 1, the contacted portion 68 in FIG. 6, and the contacted portion 70 in FIG. In addition, the part shown with the code | symbol 74a in a figure is the front-end | tip part of the lock arm pressed against the cargo-bearing floor frame 28 (refer FIG. 5, FIG. 10) by the clamp 34 (refer FIG. 10, FIG. 13). Therefore, the same effect as the example of FIGS. 1-7 can be obtained also by the structure of FIG.

  FIG. 9 shows still another application example. 9 and the above-described examples are different from each other in the examples of FIGS. 1 to 8 in which the rotation shafts 62 and 76 are fixed to the base end portions 32b and 74b of the lock arms 32 and 74, respectively. Whereas the holes 64 and 78 are formed in the brackets 36 and 72, the application example of FIG. Specifically, two support posts 84 are erected on a bracket 82 fixed to the lower end portion of the side panel 26 (see FIGS. 5 and 10), and a columnar rotating shaft 86 is fixed to the support posts 84. In addition, a block-shaped stopper member 90 is fixed between the two struts 84 of the bracket 82. A gap 92 larger than the thickness of the lock arm 88 is provided between the stopper member 90 and the rotating shaft 86. On the other hand, an oblong shaft hole 94 having a constant width extending in the vertical direction is formed at the base end portion of the lock arm 88. Further, the base end portion 88 b of the lock arm 88 is fitted into the gap 92 between the rotation shaft 86 and the stopper member 90, thereby constituting a rotation stop means for the lock arm 88. Then, the lock arm tip 88a protrudes from the lower end of the side panel and is pressed against the cargo bed floor frame 28 (see FIG. 10) by the clamp 34 (see FIGS. 10 and 13). The interval between the rotation shaft 86 and the stopper member 90 is set so that 88 can rotate with respect to the rotation shaft 86. Therefore, it will be understood that the same effects as those of the examples of FIGS.

Furthermore, the locking device according to the embodiment of the present invention is used for a side panel for a packing box in which the side panel 26 (see FIGS. 5 and 10) is divided into two parts in the vertical direction and these are pivotally attached by hinges. It is also possible.

The lock arm which comprises the locking device of the side panel of the packing box which concerns on embodiment of this invention, and the bracket which supports a lock arm are shown, (a) is the top view, (b) is the A longitudinal sectional view, (c) is a front view thereof. It is a longitudinal cross-sectional view which shows the operation procedure of the lock arm shown in FIG. It is a longitudinal cross-sectional view which shows the operation procedure following FIG. It is a longitudinal cross-sectional view which shows the operation procedure following FIG. FIG. 2 is a schematic diagram showing the state of the arm and the side panel when a force in the opening direction is applied to the side panel in the locked state of the locking device shown in FIG. b) shows the time when the force is applied. FIG. 2 shows an applied shape of the lock arm shown in FIG. 1 and a bracket that pivotally supports the lock arm, in which (a) is a longitudinal sectional view and (b) is a front view thereof. FIG. 2 shows another applied shape of the lock arm shown in FIG. 1 and a bracket that pivotally supports the lock arm, (a) is a longitudinal sectional view thereof, and (b) is a front view thereof. FIG. 10 is an exploded view showing still another applied shape of the lock arm shown in FIG. 1 and a bracket that pivotally supports the lock arm. FIG. 10 is an exploded view showing still another applied shape of the lock arm shown in FIG. 1 and a bracket that pivotally supports the lock arm. It is the schematic which shows the peripheral part of the conventional locking device. FIG. 11 shows a lock arm and a bracket constituting the conventional locking device shown in FIG. 10, wherein (a) is a longitudinal sectional view thereof and (b) is a front view thereof. FIG. 11 is an exploded view of a lock arm and a bracket constituting the conventional locking device shown in FIG. 11, wherein (a) is a side view of the lock arm and (b) is a longitudinal sectional view of the bracket. FIG. 11 shows a clamp constituting the conventional locking device shown in FIG. 10, wherein (a) is a front view thereof, (b) is a side view thereof, and (c) is a bottom view thereof.

Explanation of symbols

26: Side panel, 28: Cargo floor frame, 30: Locking device, 32: Lock arm, 32a: Tip part, 32b: Abutted part, 34: Clamp, 36: Bracket, 62: Rotating shaft, 64: Shaft hole , 66: stopper member, 68, 70: contacted portion, 72: bracket, 74: lock arm, 74a: distal end portion, 74b: proximal end portion, 76: rotating shaft, 78: shaft hole, 80: block, 80a : Void part, 82: bracket, 84: support, 86: rotating shaft, 88: lock arm, 90: stopper member, 92: gap, 94: shaft hole

Claims (7)

A lock device for a side panel of a cargo box that is flipped up and opened,
A lock arm that is pivotally supported on the lower end of the side panel via a rotating shaft that extends horizontally in the longitudinal direction of the vehicle body, and whose tip can protrude from the lower end of the side panel;
A clamp for pressing the front end of the lock arm protruding from the lower end of the side panel when the side panel is closed against a component of a separate packing box from the side panel;
When a force in the opening direction is applied to the side panel in a state in which the distal end portion of the lock arm is pressed against the component of the cargo box by the clamp, the intermediate portion of the lock arm is connected to the lower end portion of the side panel. A lock device for a side panel of a cargo box, wherein a rotation shaft of the lock arm is pivotally supported so as to be able to contact. The rotation shaft is fixed to the base end portion of the lock arm, and the shaft hole with which the rotation shaft engages is placed at a predetermined distance from the side panel in a bracket fixed near the lower end portion of the side panel. The locking device for the side panel of the packing box according to claim 1, wherein the locking device is formed. The rotating shaft has a columnar shape or a cylindrical shape, and the cross-sectional shape of the shaft hole is a long oval shape in the vertical direction of the side panel, so that the lock arm can be moved in the vertical direction of the side panel. The lock arm is rotated at the top dead center in a range where the lock arm can move up and down, and the lock arm is moved up and down in a state where the tip is directed upward of the side panel. The lock device for a side panel of a cargo box according to claim 1 or 2, further comprising a rotation stop means for restricting the rotation of the lock arm by moving to a dead center. The rotation stopping means is in a state where the tip end portion of the lock arm is directed upward of the side panel, and when the lock arm is at least at the top dead center in the range in which the lock arm can move up and down. Does not abut against the abutted part located near the rotation axis,
A stopper member that abuts against the abutted portion when the front end of the lock arm faces the upper side of the side panel and the lock arm is at least at the bottom dead center in the vertically movable range. The locking device for the side panel of the packing box according to claim 3. 5. The locking device for a side panel of a cargo box according to claim 4, wherein the abutted portion in the vicinity of the rotation axis of the lock arm forms a part of the lock arm. 5. The lock device for a side panel of a cargo box according to claim 4, wherein the abutted portion in the vicinity of the rotation axis of the lock arm is configured by fixing a member separate from the lock arm to the lock arm. . The said stopper member is being fixed to the said bracket, The locking device of the side panel of the cargo box of any one of Claim 4 to 6 characterized by the above-mentioned.

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