JP7164914B1 - Load drop prevention device and load drop prevention sheet - Google Patents

Abstract

A load drop prevention device and a load drop prevention sheet are provided that are capable of more reliably suppressing spillage of a load from a loading platform while having a simple structure.
A load drop prevention device 1 for preventing a load X loaded on a loading platform 104 of a dump truck 10 from falling to the outside includes a frame body 2 attached to a flap plate 104B, and a frame. The sheet member 3 attached to the body 2 and the binding band 4 for fixing the sheet member 3 to the frame 2 are provided. , and a reinforcing sheet portion 32 attached to the body sheet portions 31 and 31A, and the reinforcing sheet portion 32 is arranged inside the loading platform 104 in a state in which the frame body 2 is erected on the flap plate 104. In this state, it extends toward the flap plate 104B to cover the fixed portions of the main body sheet portions 31 and 31A and close the gap between the frame 2 and the flap plate 104B.
[Selection drawing] Fig. 3

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a load drop prevention device and a load drop prevention sheet for preventing a load from falling on a platform of a transport vehicle.

A transport vehicle such as a dump truck transports sand, crushed stone, or the like, for example, by loading it on a bottomed box-shaped loading platform (vessel). When a transportation vehicle travels with loads such as earth and sand or crushed stones loaded on the bed, the load may scatter or spill from the bed due to wind and vibrations generated during travel. Therefore, the loading platform is equipped with a device to prevent scattering and spilling of the load.

For example, Patent Literature 1 and Patent Literature 2 disclose a framework that is rotatably installed on a flap plate that constitutes a truck bed about an axis that extends in the front-rear direction of the truck, and a platform that is attached to the framework. A cargo carrier seat apparatus is disclosed that includes a sheet for covering a load placed on a cargo bed. The sheet covers the entire load from above so that the load is not exposed to the outside. Therefore, even if the load moves around in the loading platform due to the running vibration of the truck, it is possible to prevent the load from scattering or spilling to the outside.

Here, Patent Document 1 mentions an asphalt mixture, and Patent Document 2 mentions decontamination waste as main examples of loads to be loaded on the carrier. In the case of these loads, it is not desirable that even a part of them be exposed to the outside, so it is necessary to cover the whole with a sheet. On the other hand, when the cargo to be loaded on the loading platform is sand, crushed stone, or the like, it is not necessary to cover the entire cargo. is used to prevent the load from scattering or spilling.

For example, in Patent Document 3, it is installed on the vessel with the long side along the upper edge of the tilting plate (tilting) that constitutes the vessel through a gap, and is rotatable around the long side as the center of rotation. A shatterproof device is disclosed having a tubular framework and a sheet stretched inside the tubular framework. The outer edge of the seat is provided with a plurality of small holes through which elongated strings are inserted. A long string is passed through these small holes and wound around the pipe frame, thereby fixing the sheet to the pipe frame. When the pipe frame stands on the fanning plate, even if the load is moved inside the vessel due to running wind or vibration, the load hits the sheet and does not scatter to the outside of the vessel.

Japanese Unexamined Patent Application Publication No. 2021-11175 Japanese Patent No. 6652336 JP-A-2009-29232

In the loading platform seat devices described in Patent Documents 1 and 2, the seat has a structure for covering the entire load, so the attachment and fixing of the seat to the framework is a large task. In addition, in the anti-scattering device described in Patent Document 3, a long cord is passed through a plurality of small holes provided in the sheet and wound around the tubular framework to fix the sheet to the tubular framework. It takes time and effort to install the seat. Furthermore, since the sheet is stretched inside the pipe frame and a gap is formed between the pipe frame and the upper edge of the gate plate, the load may fall from the gap. It may get lost.

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a load drop prevention device and a load drop prevention sheet that can more reliably prevent a load from falling from a loading platform while having a simple structure. .

In order to achieve the above object, the present invention provides a cargo fall prevention device for preventing a cargo loaded on a cargo bed of a vehicle from falling to the outside, comprising left and right sidewalls of the cargo bed. A frame attached to a gate plate, a sheet member detachably attached to the frame, and a fixing member for fixing the sheet member to the frame, wherein the frame includes the gate a plurality of longitudinal portions extending along the longitudinal direction of the plate, a plurality of lateral portions connecting the plurality of longitudinal portions in a direction intersecting the direction of extension thereof, and an attachment portion for the flap plate; , wherein the sheet member includes a body sheet portion covered with the frame body and having one end folded back toward the other end at a top portion, and a reinforcing sheet portion attached to the body sheet portion. Further, in a state in which the frame is erected above the flap, a first longitudinal portion of the plurality of longitudinal portions, which is located on the flap plate side, has a gap between it and the upper end portion of the flap. and the end portion of the outer area facing the outside of the cargo bed across the folded portion of the body sheet portion passes through the gap and the cargo bed across the folded portion of the body sheet portion is fixed to the inner region by the fixing member in a state in which the reinforcing sheet portion is folded back toward the inner region side facing the inner side of the carrier, and the reinforcing sheet portion extends toward the flap plate in a state of being disposed inside the cargo bed. and covers the fixing portion between the outer region and the inner region and closes the gap.

ADVANTAGE OF THE INVENTION According to this invention, although it is a simple structure, it can suppress more reliably the spilling of the load from a loading platform. Problems, configurations, and effects other than those described above will be clarified by the following description of the embodiments.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an external side view showing one configuration example of a dump truck equipped with a load fall prevention device according to a first embodiment of the present invention; It is a perspective view which expands and shows a part of load fall prevention apparatus. FIG. 4 is a cross-sectional view of the load fall prevention device with the frame erected on the flap, viewed from the front side of the dump truck. FIG. 4 is a cross-sectional view of the load fall prevention device in a state in which the frame body is tilted to the side of the flap, viewed from the front side of the dump truck. FIG. 3 is an external side view showing the dump truck with the seat member removed; It is a side view which expands and shows the P section in FIG. It is a top view which expands and shows the P section in FIG. It is a top view of a sheet member. FIG. 4 is an exploded view of the seat member; It is a side sectional view of a sheet member. It is sectional drawing at the time of seeing the load fall prevention apparatus which concerns on a modification from the front side of a dump truck. FIG. 11 is a perspective view showing a partial configuration of a sheet member of a loaded object fall prevention device according to a second embodiment; FIG. 12 is a side cross-sectional view of the sheet member shown in FIG. 11; It is a figure which shows an example of the adjustment method of the attachment position with respect to the frame of a sheet|seat member. FIG. 10 is a diagram showing another example of a method of adjusting the mounting position of the sheet member with respect to the frame;

A load fall prevention device according to each embodiment of the present invention is a device for preventing a load loaded on a loading platform of a vehicle from falling to the outside. In the following, a description will be given of a case in which the load drop prevention device is used for the loading platform of a dump truck.

<First embodiment>
A load fall prevention device 1 according to a first embodiment of the present invention will be described with reference to FIGS.

(Configuration of dump truck 10)
First, the configuration of a dump truck 10 to which the load drop prevention device 1 is applied will be described with reference to FIG.

FIG. 1 is an external side view showing a configuration example of a dump truck 10 equipped with a load fall prevention device 1 according to the first embodiment.

The dump truck 10 includes a body frame 101 that supports the entire vehicle, a pair of left and right front wheels 102A rotatably attached to the front portion of the body frame 101, and a pair of left and right wheels rotatably attached to the rear portion of the body frame 101. A rear wheel 102B, an operator's cab 103 provided on the front side of the vehicle body frame 101, and a loading platform 104 provided on the rear side of the operator's cab 103 on the vehicle body frame 101 are provided. Note that FIG. 1 shows only the left front wheel 102A and the left rear wheel 102B of the pair of left and right front wheels 102A and rear wheels 102B.

The loading platform 104 includes a front wall 104A erected to face the rear surface of the driver's cab 103, a pair of flaps 104B extending in the longitudinal direction of the vehicle and forming left and right side walls, and rear ends of the pair of flaps 104B. A box-like container having a rear wall 104C erected on one side, and a load such as earth and sand or crushed stone is loaded inside.

The loading platform 104 is attached to the body frame 101 via a hydraulic cylinder so as to be vertically tiltable. Specifically, the front portion of the loading platform 104 tilts downward due to the contraction of the hydraulic cylinder, and assumes a lying position in which it is seated on the vehicle body frame 101, and the front portion tilts upward due to the extension of the hydraulic cylinder. Then, the vehicle body frame 101 assumes a standing posture. When the loading platform 104 assumes the upright posture, loads such as sand and crushed stones loaded inside are discharged at once.

The dump truck 10 is a transport vehicle that transports cargo, and travels with a loading platform 104 loaded with cargo. At this time, there is a possibility that the load may be scattered or spilled from the loading platform 104 due to wind, vibration, or the like. Therefore, the loading platform 104 is provided with a load drop prevention device 1 for preventing the load from scattering or spilling to the outside.

(Overall configuration of load fall prevention device 1)
Next, the overall configuration of the load fall prevention device 1 will be described with reference to FIGS. 2 to 5 and FIGS. 6A and 6B in addition to FIG.

FIG. 2 is a perspective view showing an enlarged part of the load fall prevention device 1. As shown in FIG. FIG. 3 is a cross-sectional view of the load fall prevention device 1 with the frame 2 erected on the flap 104B as viewed from the front side of the dump truck 10. As shown in FIG. FIG. 4 is a cross-sectional view of the load fall prevention device 1 viewed from the front side of the dump truck 10 with the frame body 2 tilted toward the fan plate 104B. FIG. 5 is an external side view showing the dump truck 10 with the sheet member 3 removed. 6A is a side view showing an enlarged portion P in FIG. 5. FIG. 6B is a top view showing an enlarged portion P in FIG. 5. FIG.

A load drop prevention device 1 includes a frame 2 attached to a flap 104B, a sheet member 3 detachably attached to the frame 2 as a load drop prevention sheet, and the sheet member 3 attached to the frame 2. A plurality of binding bands 4 as fixing members for fixing are provided.

The load fall prevention device 1 includes a pair of each of these members corresponding to the left and right flaps 104B. 1, that is, the configuration of each member arranged on the left side of the vehicle will be described as an example.

As shown in FIGS. 1 and 5, the frame 2 is formed in a frame shape by processing a metal rod-shaped member, and the outer frame portion has a size corresponding to the flap plate 104B. It is roughly rectangular. In addition, in FIG. 1, the frame 2 is hidden inside the sheet member 3, so it is indicated by a broken line.

In this embodiment, the frame body 2 has three longitudinal portions 21 to 23 extending along the long side direction (front-rear direction of the vehicle) of the flap plate 104B, and the three longitudinal portions 21 to 23 extending from the three longitudinal portions 21 to 23 . Four short parts 24 to 27 connected in a direction intersecting the direction are combined to form a strip shape.

The frame 2 is attached to the upper end portion of the flap plate 104B by three attachment portions 28. As shown in FIG. In the present embodiment, the frame body 2 is placed upright above the flap plate 104B about the axis along the long side direction of the flap plate 104B by the driving force of a motor (not shown) (see FIG. 1). , positions shown in FIGS. 3 and 5) and a position overlapping the outside of the flap 104B (position shown in FIG. 4).

As shown in FIGS. 1 and 3, the three longitudinal sections 21 to 23 are formed of hollow circular pipes, for example, and arranged side by side in the height direction of the dump truck 10 at predetermined intervals. Specifically, of the three longitudinal portions 21 to 23, the first longitudinal portion 21 is closest to the fan plate 104B, the second longitudinal portion 22 is adjacent to the first longitudinal portion 21, and the third longitudinal portion 23 is They are located next to the second longitudinal portion 22 (farthest from the flap plate 104B). That is, the three longitudinal portions 21 to 23 are arranged in the order of the first longitudinal portion 21, the second longitudinal portion 22, and the third longitudinal portion 23 from the side of the flap 104B. A second longitudinal portion 22 positioned between the first longitudinal portion 21 and the third longitudinal portion 23 corresponds to a horizontal middle frame.

Like the three longitudinal sections 21 to 23, the four short sections 24 to 27 are formed of, for example, hollow circular pipes, and are spaced apart from each other in the longitudinal direction of the dump truck 10 as shown in FIG. are arranged side by side. Specifically, of the four short sides 24 to 27, the first short side 24 and the second short side 25 form the first longitudinal part 21 and the third longitudinal part 23 in the longitudinal direction. The remaining third short-hand portion 26 and fourth short-hand portion 27 are connected at both ends, and the remaining third short-hand portion 26 and fourth short-hand portion 27 are connected between the first short-hand portion 24 and the second short-hand portion 25 to form the second longitudinal portion 22 and the third longitudinal portion. 23 is connected.

As shown in FIG. 3, the three mounting portions 28 are each made of the same metal material as the three longitudinal portions 21 to 23 and the four short portions 24 to 27, and are attached to the outer surface 401 of the flap plate 104B. It has a fixed bracket 281 and a main body 282 fixed to the bracket 281 and to which the first longitudinal section 21 is rotatably attached.

The bracket 281 has an L-shaped cross section, and includes a fixing surface portion 281A that serves as a fixing surface to the outer surface 401 of the flap plate 104B, and an overhanging surface portion 281B that projects from the upper end of the fixing surface portion 281A toward the outside of the flap plate 104B. , has

The main body 282 has a substantially rectangular parallelepiped shape and is fixed on the projecting surface portion 281B. A through hole 282A is formed in the main body 282 so as to extend through the flap plate 104B in the longitudinal direction. The first longitudinal portion 21 is inserted through the through hole 282A. That is, the first longitudinal portion 21 is rotatably attached to the main body 282 by being inserted through the through holes 282A of the main body 282 in each of the three attachment portions 28 . As a result, in this embodiment, the frame 2 can rotate about its upper end with respect to the flap 104B.

When the load fall prevention device 1 is used, the frame 2 is fixed in an upright position above the flap 104B (see FIG. 3). They are in a state of being overlapped on the side surface 401 (see FIG. 4). Therefore, as shown in FIGS. 3 and 4, the axis that serves as the rotation center of the frame 2 must be offset outward from the plane including the flap 104B. Therefore, as shown in FIGS. 3, 6A, and 6B, when the frame 2 is erected above the flap 104B, there is a gap between the first longitudinal portion 21 and the upper end of the flap 104B. A predetermined gap S is interposed.

More specifically, as shown in FIG. 6A, the gap S extends horizontally (horizontal direction of the vehicle body) between the first longitudinal portion 21 and the upper end surface 403 of the flap plate 104B, and is shown in FIG. 6B. As shown, it penetrates in the vertical direction (vertical direction of the vehicle body) between the first longitudinal portion 21 and the outer side surface 401 of the flap plate 104B.

It should be noted that the frame 2 does not necessarily have to be rotatably attached to the flapping plate 104B, and is non-rotatably fixed to the upper end of the flapping plate 104B with a gap S therebetween. It may be changed as appropriate according to the specifications of the dump truck 10 .

Further, in this embodiment, the frame 2 has three longitudinal portions 21 to 23, four lateral portions 24 to 27, and three mounting portions 28, but the longitudinal portions 21 to 23 and the short parts 24 to 27 may be plural, and they do not necessarily have to be formed of hollow circular pipes. There are no particular restrictions on the shape.

(Structure of sheet member 3)
Next, a specific configuration of the sheet member 3 will be described with reference to FIGS. 7 to 9 in addition to FIGS. 2 to 4. FIG.

7 is a plan view of the sheet member 3. FIG. 8 is a developed view of the sheet member 3. FIG. FIG. 9 is a side sectional view of the sheet member 3. FIG.

The sheet member 3 has, as shown in FIG.

As shown in FIGS. 2 to 4 and 9, the main sheet portion 31 is formed by folding one end of the main sheet material 301A, which is a rectangular sheet material, in the long side direction toward the other end at the top. , a pair of joints 313A and 313B that join a folded portion (top portion) 310 that is a folded portion, one side region 311 and the other side region 312 sandwiching the folded portion 310, and on the opposite side of the folded portion 310 and an opening 314 that opens. In the main sheet portion 31, the long side direction of the main sheet material 301A is the short side direction, and the short side direction of the main sheet material 301A is the long side direction.

In addition, as shown in FIG. 8, the body sheet portion 31 is desirably formed in a bag shape by joining one side region 311 and the other side region 312 by a pair of joining portions 313A and 313B, but not necessarily. It does not have to be bag-shaped, and it is sufficient that at least the top portion is folded back and has a folded portion 310 .

In the present embodiment, as shown particularly in FIG. 9, the main sheet member 301A and the main sheet member 301A are provided at one end in the long side direction of the back surface of the main sheet member 301A (the surface on the side that contacts the frame body 2). Auxiliary sheet materials 301B made of the same sheet material are joined by joining means such as welding or sewing, for example.

The auxiliary sheet material 301B has a rectangular shape, and the length of the long side is the same as the length of the short side of the main sheet material 301A. As indicated by sand in FIG. 8, one long-side end of the main sheet material 301A and one long-side part of the auxiliary sheet material 301B form a joint portion 31C. The joint portion 31C extends from one end to the other end in the short side direction of the main sheet material 301A (the long side direction of the auxiliary sheet material 301B). For the main sheet material 301A and the auxiliary sheet material 301B, for example, a waterproof vinyl chloride material is used.

It should be noted that the main sheet portion 31 does not necessarily have to be formed of two sheet materials, the main sheet material 301A and the auxiliary sheet material 301B, and is formed of only one sheet material, that is, the main sheet material 301A. good too.

As shown in FIG. 3, the main body sheet portion 31 covers the frame 2 from the third longitudinal portion 23 side, the folded portion 310 is on the third longitudinal portion 23 side, and the opening portion 314 is on the third longitudinal portion 23 side. They are located on the side of one longitudinal portion 21, respectively.

Here, in a state in which the frame body 2 is erected on the flap plate 104B, the area facing the outside of the loading platform 104 across the folded portion 310 of the main body sheet portion 31 is defined as an "outer area". A region facing the inside of the loading platform 104 with the portion 310 interposed therebetween is referred to as an “inner region”. In this embodiment, the one side area 311 sandwiching the folded portion 310 corresponds to the "outer area", and the other side area 312 sandwiching the folded portion 310 corresponds to the "inner area". In the following description, "one side area 311" may be referred to as "outer area 311" and "other side area 312" may be referred to as "inner area 312".

The pair of joints 313A and 313B, as shown by sand in FIG. 312. The pair of joint portions 313A and 313B respectively extend from the folded portion 310 toward the opening portion 314 side opposite thereto.

As shown in FIG. 9, the length from the folded portion 310 to the tip of the one side region 311 (the tip of the auxiliary sheet material 301B) of the main body sheet portion 31 is the length from the folded portion 310 to the tip of the other side region 312. As shown in FIG. set to be longer than That is, in the main body sheet portion 31, the outer region 311 extends further toward the flap plate 104B than the inner region 312 when the frame 2 is erected.

As shown in FIGS. 7 and 8, a plurality of through holes 33 extending in the thickness direction are formed in the front end portion of the outer region 311 (auxiliary sheet member 301B) of the main body sheet portion 31 along the longitudinal direction of the frame 2. are formed at predetermined intervals. Similarly, a plurality of through holes 34 penetrating in the thickness direction are formed at predetermined intervals along the longitudinal direction of the frame 2 at the tip of the inner region 312 of the main body sheet portion 31 .

The plurality of through holes 33 formed in the outer region 311 and the plurality of through holes 34 formed in the inner region 312 are arranged at positions corresponding to each other. The binding band 4 is inserted through each of the through holes 33 and 34 as shown in FIGS. 2 and 7 . A method of fixing the main body sheet portion 31 to the frame 2 will be described later.

The reinforcing sheet portion 32 is formed of, for example, a rectangular sheet material made of a waterproof vinyl chloride material, and the length of the long side is the length of the main sheet portion 31 in the longitudinal direction, that is, the main sheet material. It is the same as the length of the short side of 301A.

As shown in FIG. 2, one long side portion of the reinforcing sheet portion 32 is attached to the surface of the inner region 312 of the body sheet portion 31 (the surface exposed to the inside of the loading platform 104). A joint portion 35A (indicated by sand in FIGS. 3, 4, and 8) between the main body sheet portion 31 and the reinforcing sheet portion 32 is located at the position of the second longitudinal portion 22 of the frame 2 from one longitudinal end thereof. extending across the other end.

The second longitudinal portion 22 serves as a middle frame to reinforce the tubular frame. may damage the Therefore, as shown in FIG. 2, the joining portion 35A of the reinforcing sheet portion 32 is formed between the second longitudinal portion 22 and the main body sheet portion 31 so that the contact area between the second longitudinal portion 22 and the main body sheet portion 31 is covered with the reinforcing sheet portion 32. It is desirable to be positioned between the third longitudinal portion 23 .

In this embodiment, a hook-and-loop fastener is used for the joining portion 35A, and the reinforcing sheet portion 32 is detachably attached to the main body sheet portion 31. As shown in FIG. Note that the reinforcing sheet portion 32 does not necessarily have to be detachably attached to the body sheet portion 31 , and may be fixed to the body sheet portion 31 .

Further, in the present embodiment, as shown in FIG. 9, the thickness T2 of the sheet material of the reinforcing sheet portion 32 is greater than the thickness T1 of the sheet material (the main sheet material 301A and the auxiliary sheet material 301B) of the main body sheet portion 31. It is thicker (thickness T2 of reinforcing sheet portion 32>thickness T1 of main body sheet portion 31). That is, the sheet material of the reinforcing sheet portion 32 is stronger than the sheet material of the main body sheet portion 31 .

As shown in FIGS. 2 to 4, the reinforcing sheet portion 32 extends from the inner region 312 of the main body sheet portion 31 toward the flap plate 104B. In FIG. 6, the reinforcing sheet portion 32 extends beyond the tip of the outer region 311 of the main body sheet portion 31. However, depending on the specifications of the main body seat portion 31, the reinforcing sheet portion 32 may extend outside the main body seat portion 31. The region 311 may extend beyond the tip of the reinforcing sheet portion 32 .

(Fixing method of sheet member 3)
Next, a method for fixing the sheet member 3 will be described with reference to FIGS. 2, 3 and 7. FIG.

When attaching the sheet member 3 to the frame 2, first, as shown in FIGS. The frame 2 is covered from the side of the third longitudinal portion 23 through the opening. At this time, as shown in FIG. 3, the reinforcing sheet portion 32 extends to the inner surface 402 of the flap plate 104B while being arranged inside the loading platform 104. As shown in FIG.

Next, the tip of the outer region 311 of the main body seat portion 31 is folded back toward the inner region 312 through the gap between the first longitudinal portion 21 and the upper end of the flap plate 104B. Subsequently, the binding band 4 is inserted through the plurality of through holes 33 of the folded outer region 311 and the plurality of through holes 34 of the inner region 312 to bind the outer region 311 and the inner region 312 . Thereby, the sheet member 3 is fixed to the frame 2 . In this manner, the sheet member 3 has a simple structure that does not take time and effort to attach to the frame 2 .

At this time, as shown in FIG. 3, the reinforcing sheet portion 32 covers the fixed portion (the portion bound by the plurality of binding bands 4) between the outer region 311 and the inner region 312 of the main body sheet portion 31, It closes the gap S between the 1 longitudinal portion 21 and the upper end portion of the flap 104B.

Also, at this time, in the present embodiment, the leading end of the main sheet member 301A of the main body sheet portion 31 extends toward the flap plate 104B to close the gap S (see FIGS. 1 and 3). . As a result, the gap S is not visible from the outside (outside the loading platform 104), and the appearance is improved. Thus, in this embodiment, the gap S is closed by the reinforcing sheet portion 32 from the inside of the loading platform 104 and is closed by the main body sheet portion 31 (main sheet material 301A) from the outside of the loading platform 104 .

Subsequently, in the present embodiment, the reinforcing sheet fixing device 5 is used to fix the reinforcing sheet portion 32 to the upper end surface 403 of the tilting plate 104B. The reinforcing sheet fixing device 5 has a pressing member 51 extending in the long side direction of the flapping plate 104B, and a plurality of screws 52 as reinforcing sheet fixtures for fixing the reinforcing sheet portion 32 to the flapping plate 104B. .

The pressing member 51 is made of, for example, an iron plate, and the width in the lateral direction is set to be approximately the same as the width dimension of the upper end surface 403 of the tilting plate 104B. The pressing member 51 is provided with a plurality of screw holes to which a plurality of screws 52 are attached at predetermined intervals in the longitudinal direction.

As described above, in this embodiment, the reinforcing sheet portion 32 is fixed to the upper end surface 403 of the flap plate 104B by the plurality of screws 52 while being sandwiched between the upper surface 403 of the flap plate 104B and the pressing member 51 . As a result, it is possible to avoid a situation in which the reinforcing sheet portion 32 is turned up due to the wind generated by the running of the dump truck 10, for example.

The fixing position of the reinforcing sheet portion 32 is not necessarily the upper end surface 403 of the flapping plate 104B, and there is no particular limitation as long as it is the upper end portion of the flapping plate 104B. A case where the reinforcing sheet portion 32 is fixed to a portion other than the upper end surface 403 of the flap plate 104B will be described later as a modified example.

Further, the reinforcing sheet portion 32 is loaded in the loading platform 104 at its leading end portion (the end portion opposite to the joint portion 35A) in a state of being fixed to the upper end portion of the flap plate 104B by the reinforcing sheet fixing device 5. It is preferable that the length in the short side direction is set so as not to come into contact with the loaded object X as much as possible. If the tip of the reinforcing sheet portion 32 is sandwiched between the load X and the inner side surface 402 of the flap 104B, the tip of the reinforcing sheet portion 32 is likely to be worn due to friction with the load X. turn into. Therefore, by preventing the reinforcing sheet portion 32 from coming into contact with the load X, wear of the reinforcing sheet portion 32 can be minimized.

Further, as shown in FIG. 3, the reinforcing sheet portion 32 is fixed by the joining portion 35A to the main body sheet portion 31 and the reinforcing sheet fixing device 5 in a state in which the frame body 2 is erected on the fan plate 104B. At least a portion between the bottom portion and the bottom portion bulges toward the inside of the loading platform 104 . Since this bulge serves as a cushion, even if the load X loaded in the loading platform 104 hits the reinforcing sheet portion 32, damage to the reinforcing sheet portion 32 can be suppressed.

As described above, the load drop prevention device 1 has a simple structure in which the sheet member 3 is attached to the frame 2 . On the other hand, in the sheet member 3, the end portion of the outer region 311 of the main body sheet portion 31 passes through the gap S1 between the first longitudinal portion 21 of the frame 2 and the upper end portion of the flap 104B to the inner region 312 side. Since the sheet member 3 is bound to the inner region 312 by a plurality of binding bands 4 in a folded state, the sheet member 3 is unlikely to come off from the frame body 2 even when wind or vibration occurs due to the running of the dump truck 10. It has become.

Furthermore, in this embodiment, since the fixing member for fixing the sheet member 3 to the frame 2 is a plurality of binding bands 4, for example, as described in Patent Document 3 cited in the prior art document, one The attachment work is easier than when the sheet member 3 is fixed to the frame 2 by winding a long string. Further, when the sheet member 3 is fixed to the frame 2 by winding a single long string, the sheet member 3 is likely to come off the frame 2 if even one of the strings is cut. However, when the sheet member 3 is fixed to the frame 2 with a plurality of binding bands 4, even if one of the plurality of binding bands 4 comes off, the sheet member 3 remains fixed to the frame 2. can be maintained.

In addition, in the load fall prevention device 1, the reinforcing sheet portion 32 of the sheet member 3 extends toward the inner side surface 402 of the flap plate 104B in a state of being arranged inside the loading platform 104, and extends to the outside of the main body sheet portion 31. It covers the fixed portion (the portion where the plurality of binding bands 4 are attached) between the region 311 and the inner region 312, and closes the gap between the first longitudinal portion 21 of the frame 2 and the upper end portion of the flap 104B. Therefore, it is possible to more reliably suppress spilling of the load X from the loading platform 104 to the outside, as compared with the case where the reinforcing sheet portion 32 is not provided.

Furthermore, in the present embodiment, since the reinforcing sheet portion 32 is made of a sheet material that is thicker than the sheet material of the main body sheet portion 31 , the load X, such as earth and sand or crushed stones, collides with the reinforcing sheet portion 32 . It is hard to be damaged even if it does.

It should be noted that the weight of the sheet material increases as the thickness of the same material increases. It becomes difficult to attach and detach the sheet member 3 to and from. This problem becomes more pronounced as the loading platform 104 becomes larger. However, by forming only the reinforcing sheet portion 32, which is in direct contact with the load X, with a thick sheet material as in the present embodiment, the sheet member 3 can be a member that is resistant to breakage while suppressing an increase in the overall weight. Become.

Further, in the present embodiment, the reinforcing sheet portion 32 is detachably attached to the main body sheet portion 31 by a hook-and-loop fastener. The sheet portion 32 can be removed from the main body sheet portion 31 and replaced with a new reinforcing sheet portion 32, and there is no need to replace the entire sheet member 3 with a new sheet member 3. - 特許庁

(Modification)
Next, a load fall prevention device 1A according to a modification of the first embodiment of the present invention will be described with reference to FIG.

FIG. 10 is a cross-sectional view of the load fall prevention device 1 according to the modification as viewed from the front side of the dump truck 10. As shown in FIG.

In this modified example, as shown in FIG. 10, the reinforcing sheet portion 32 is sandwiched between the inner side surface 402 of the gate plate 104B and the pressing member 51, and is fixed to the inner side surface of the gate plate 104B by a plurality of screws 52. 402. At this time, one end of the pressing member 51 in the extending direction is positioned at the upper end of the inner side surface 402 of the flap 104B so that the reinforcing sheet fixing device 5 does not come into contact with the load X on the loading platform 104 as much as possible. are placed.

Thus, the fixing position of the reinforcing sheet portion 32 on the fan plate 104B may be the inner side surface 402. In this case, compared to the case of the first embodiment, the reinforcing sheet portion 32 is reinforced by the fixing device 5 for the reinforcing sheet. Since the tip portion of the sheet portion 32 is more fixed, the load X is less likely to come into contact with the tip portion of the reinforcing sheet portion 32 .

<Second embodiment>
Next, a load fall prevention device 1 according to a second embodiment of the present invention will be described with reference to FIGS. 11 to 14. FIG. In FIGS. 11 to 14, the same reference numerals are assigned to the same components as those described for the load fall prevention device 1 according to the first embodiment, and the description thereof will be omitted.

FIG. 11 is a perspective view showing a partial configuration of the sheet member 3A of the load fall prevention device 1 according to the second embodiment. 12 is a side sectional view of the sheet member 3A shown in FIG. 11. FIG. 13A and 13B are diagrams showing an example of a method of adjusting the mounting position of the sheet member 3A with respect to the frame 2. FIG.

In this embodiment, the mounting position of the sheet member 3A in the height direction (transverse direction) with respect to the frame 2 is adjustable so that the sheet member 3A can be attached to the frame 2 of various heights. there is

As shown in FIGS. 11 and 12, the sheet member 3A has a plurality of adjustment holes 36 and 37 penetrating in the thickness direction to adjust the mounting position of the sheet member 3A with respect to the frame 2. and the other side region 312A.

A plurality of adjustment holes 36 provided in the one-side region 311A are arranged in series from the folded portion 310 along the width direction of the main body sheet portion 31A toward the opening portion 314 on the opposite side. A plurality of sets are lined up in the longitudinal direction of the main body sheet portion 31 at predetermined intervals.

In addition, the three adjustment holes 36 arranged in series along the width direction of the body sheet portion 31A are arranged in order from the folded portion 310 side toward the opening portion 314 side, the first adjustment hole 36A, the second adjustment hole 36B, the 3 adjustment hole 36C.

Similarly, the plurality of adjustment holes 37 provided in the other side region 312A are three in series from the folded portion 310 toward the opening 314 on the opposite side along the width direction of the main body sheet portion 31A. A plurality of sets are lined up with a predetermined interval in the longitudinal direction of the main body seat portion 31 as one set of three of them.

Also, like the plurality of adjustment holes 36 in the one-side region 311A, the three adjustment holes 37 arranged in series along the width direction of the main body sheet portion 31A are arranged in order from the folded portion 310 side toward the opening portion 314 side. , a first adjustment hole 37A, a second adjustment hole 37B, and a third adjustment hole 37C.

As shown in FIG. 12, the plurality of adjustment holes 36 in the one-side region 311A and the plurality of adjustment holes 37 in the other-side region 312A are arranged at positions corresponding to each other, that is, facing each other. Specifically, the first adjustment hole 36A of the one-side area 311A is connected to the first adjustment hole 37A of the other-side area 312A, and the second adjustment hole 36B of the one-side area 311A is connected to the second adjustment hole 37B of the other-side area 312A. , and the third adjustment holes 36C of the one-side region 311A correspond to the third adjustment holes 37C of the other-side region 312A.

In this embodiment, the pair of joints 313A and 313B extends from a position spaced apart from the folded portion 310 by a predetermined distance toward the opening 314 opposite to the folded portion 310 . Therefore, as shown in FIG. 11, the body sheet portion 31A is in a state in which both longitudinal ends are not joined at one lateral end including the folded portion 310 .

As shown in FIG. 13, when adjusting the mounting position of the sheet member 3A with respect to the frame 2, first, the body sheet portion 31A is rounded from the folded portion 310 side to the desired positions of the adjustment holes 36 and 37. As shown in FIG. At this time, the desired adjustment holes 36 and 37 are positioned immediately above the third longitudinal portion 23 of the frame 2 . Then, the body sheet portion 31A is bound by the adjustment binding band 4A inserted through the desired adjustment holes 36 and 37 in a state where one end portion in the width direction including the folded portion 310 is rounded.

In FIG. 13, the binding band 4A for adjustment is inserted through the third adjustment holes 36C and 37C, and the mounting position of the sheet member 3A with respect to the frame 2 is adjusted at the positions of the third adjustment holes 36C and 37C. . In this embodiment, since the three adjustment holes 36A to 36A to 37A to 37A to 37C are arranged at predetermined intervals along the width direction of the body seat portion 31A, the seat member 3A can be mounted at three stages. It is possible to adjust.

The method of adjusting the mounting position of the sheet member 3A in the height direction with respect to the frame 2 is not limited to the method shown in FIG. 14A and 14B are diagrams showing another example of a method of adjusting the mounting position of the sheet member 3A with respect to the frame 2. FIG.

In FIG. 14 , first, the folded portion 310 of the main body sheet portion 31A is valley-folded toward the third longitudinal portion 23 of the frame 2 . At this time, the desired adjustment holes 36 and 37 are positioned immediately above the third longitudinal portion 23 of the frame 2, as in the case of FIG. In the case of FIG. 14, the first adjustment holes 36A and 37A are positioned immediately above the third longitudinal portion 23. In FIG.

Then, the main body sheet portion 31A is bound by the adjustment binding band 4A inserted through the desired adjustment holes 36 and 37 in a state where the folded portion 310 is folded in the valley. In FIG. 14, the binding band 4A for adjustment is inserted through the first adjustment holes 36A and 37A, and the mounting position of the sheet member 3A with respect to the frame 2 is adjusted at the positions of the first adjustment holes 36A and 37A.

The adjustment of the mounting position of the sheet member 3</b>A in the height direction with respect to the frame 2 does not necessarily have to be three stages, and can be appropriately changed according to the specifications of the frame 2 . Further, the body sheet portion 31A does not necessarily need to be bound by the binding band 4A for adjustment, and the one end portion in the width direction including the folded portion 310 is rounded or the folded portion 310 is valley-folded. The type of the band member is not particularly limited as long as the band member can be bound with a wire.

As described above, in the present embodiment, the sheet member 3A has an adjustment mechanism for adjusting the length in the lateral direction on the side of the folded portion 310, so that the sheet member 3A can be attached to frames 2 of various heights. becomes possible. Therefore, it is not necessary to individually form the sheet member 3A according to the specifications of the frame body 2 . Moreover, this adjusting mechanism has a simple structure composed of a plurality of adjusting holes 36 and 37 formed in the main body seat portion 31A and the adjusting binding band 4A, and the seat member 3A can be adjusted by a simple and labor-saving work. can be adjusted to the mounting position with respect to the frame 2.

Each embodiment of the present invention has been described above. In addition, the present invention is not limited to each embodiment described above, and includes various modifications. For example, each of the above-described embodiments has been described in detail in order to explain the present invention in an easy-to-understand manner, and is not necessarily limited to those having all the described configurations. Further, part of the configuration of this embodiment can be replaced with the configuration of another embodiment, and it is also possible to add the configuration of another embodiment to the configuration of this embodiment. Furthermore, it is possible to add, delete, or replace a part of the configuration of this embodiment with another configuration.

For example, in the above embodiment, the dump truck 10 is described as an example of a vehicle to which the load drop prevention device 1 is applied. If there is, it may be a vehicle other than the dump truck 10 .

Further, in the above embodiment, the sheet members 3 and 3A are made of a waterproof vinyl chloride material, but the material itself is not limited to this, as long as it is flexible. do not have.

1: load drop prevention device 2: frame 3, 3A: sheet member, load drop prevention sheet 4: binding band (fixing member)
4A: Binding band for adjustment (band member)
10: Dump truck (vehicle)
21 to 23: Long parts 24 to 27: Short parts 28: Mounting parts 31, 31A: Main body sheet part 32: Reinforcement sheet parts 33, 34: Through holes 36, 37: Adjustment hole 51: Holding member 52: Screw (reinforcement seat fixture)
104: loading platform 104B: flapping plate 310: folded portion, top 311, 311A: one side region, outer regions 312, 312A: other side region, inner regions 313A, 313B: joint 314: opening S: gap

Claims (11)

A load drop prevention device for preventing a load loaded on a vehicle bed from falling to the outside,
a frame attached to a flap that forms left and right side walls of the loading platform;
a sheet member detachably attached to the frame;
a fixing member for fixing the sheet member to the frame,
The frame is
a plurality of longitudinal portions extending along the longitudinal direction of the gate plate;
a plurality of short parts connecting the plurality of longitudinal parts in a direction intersecting with their extending direction;
and a mounting portion for the tilting plate,
The sheet member is
a body sheet portion covered with the frame body and having one end side folded back at the top portion toward the other end side;
a reinforcing sheet portion attached to the main body sheet portion;
In a state in which the frame is erected above the tilting plate,
A first longitudinal portion of the plurality of longitudinal portions located on the side of the gate plate is arranged with a gap between it and an upper end portion of the gate plate,
An end portion of an outer area of the main body sheet portion facing the outside of the cargo bed across the folded portion passes through the gap to the inner side of the main body sheet portion facing the inner side of the cargo bed across the folded portion. fixed to the inner region by the fixing member in a state of being folded back to the side of the region;
The reinforcing sheet portion is arranged inside the cargo bed and extends toward the flap plate to cover the fixed portion between the outer region and the inner region and close the gap. A load drop prevention device. The load fall prevention device according to claim 1,
The reinforcing sheet portion is
A device for preventing the fall of a load, which is detachably attached to the sheet portion of the main body by means of a hook-and-loop fastener. The load fall prevention device according to claim 1,
The reinforcing sheet portion is
A device for preventing a load from falling, wherein the device is made of a sheet material that is thicker than the sheet material of the body sheet portion. The load fall prevention device according to claim 1,
a pressing member extending in the long side direction of the gate plate;
a reinforcing sheet fixture for fixing the reinforcing sheet portion to the gate plate,
The reinforcing sheet portion is
A device for preventing a load from falling, wherein the device is fixed to the upper end portion of the flap plate by the reinforcing sheet fixture while being sandwiched between the upper end portion of the flap plate and the pressing member. The load fall prevention device according to claim 4,
The frame is
Rotating around an axis provided on the outer side of the flap along the longitudinal direction of the flap between a position erected on the upper side of the flap and a position overlapping the flap on the outside thereof. movably mounted,
The reinforcing sheet portion is
fixed to the upper end portion of the gate plate by the reinforcing sheet fixture inside the shaft;
The length between the joint portion with the main body sheet portion and the portion fixed by the reinforcing sheet fixing member is the reinforcing sheet portion and the main body sheet in a state in which the frame is erected above the tilting plate. A device for preventing the fall of a loaded object, characterized in that the distance between a position of a joint portion with a part and a fixing position of the reinforcing sheet fixture is longer than the distance. The load fall prevention device according to claim 1,
The fixing member is
Consists of multiple cable ties,
In the main body seat part,
A plurality of through-holes penetrating in the thickness direction are provided in the region to be the fixed portion,
In a state in which the frame is erected above the tilting plate,
Each of the plurality of binding bands separates the outer region and the inner region while being inserted through the through hole on the outer region side and the through hole on the inner region side among the plurality of through holes. A device for preventing a load from falling, characterized by being tied. The load fall prevention device according to claim 1,
The plurality of longitudinal portions of the frame are
the first longitudinal portion;
a second longitudinal portion arranged adjacent to the first longitudinal portion;
a third longitudinal portion arranged further adjacent to the second longitudinal portion;
The reinforcing sheet portion is
A joint portion with the main body sheet portion is located between the second longitudinal portion and the third longitudinal portion, and covers a contact area between the second longitudinal portion and the main body sheet portion. Load fall prevention device. The load fall prevention device according to claim 1,
The main body sheet portion
Having a joint portion that joins one side region and the other side region sandwiching the folded portion,
The junction is
extending from a position spaced apart from the folded portion at a predetermined distance from the folded portion to the side opposite to the folded portion at both ends of the main body sheet portion in the extending direction of the folded portion;
In the one side area and the other side area, respectively,
A plurality of adjustment holes penetrating in the thickness direction for adjusting the mounting position of the sheet member with respect to the frame are arranged in series toward the side opposite to the folded portion and provided at positions corresponding to each other. ,
The sheet member is
The band member inserted through the adjustment hole on the side of the one side area and the adjustment hole on the side of the other side area is folded so that the main body sheet portion and the folded portion are valley-folded toward the frame. A device for preventing a load from falling, wherein a mounting position with respect to the frame can be adjusted by binding in a state. A cargo fall prevention sheet is detachably attached to a frame attached to a flap that constitutes the left and right side walls of a cargo bed of a vehicle, and prevents a cargo loaded on the cargo bed from falling to the outside. hand,
a main body sheet part with one end side folded back toward the other end side at the top part;
a reinforcing sheet portion attached to one side surface of the body sheet portion sandwiching the folded portion,
In the main body seat part,
A plurality of through holes through which a plurality of binding bands for fixing to the frame are inserted through in the thickness direction are provided at the end on the side of the opening formed on the opposite side of the folded portion,
The reinforcing sheet portion is
A sheet for preventing a load from falling, wherein a leading end portion extends beyond the end portion of the body sheet portion on the side of the opening portion. The load drop prevention sheet according to claim 9,
The reinforcing sheet portion is
A sheet for preventing a load from falling, characterized in that it is detachably attached to the main body sheet portion with a hook-and-loop fastener. The load drop prevention sheet according to claim 9,
The reinforcing sheet portion is
A sheet for preventing a load from falling, characterized by being formed of a sheet material thicker than the sheet material of the body sheet portion.

Images