Jig for cargo bed
The cargo bed jig with rotating plates and support system addresses the inefficiencies of existing discharge jigs by facilitating smooth discharge of viscous materials and reducing weight and space occupation, improving load capacity and efficiency in same-day burial construction.
Patent Information
- Authority / Receiving Office
- JP · JP
- Patent Type
- Patents
- Current Assignee / Owner
- TOKYO ELECTRIC POWER CO HOLDINGS INC
- Filing Date
- 2023-02-14
- Publication Date
- 2026-07-23
AI Technical Summary
Existing dump truck discharge jigs are heavy, occupy a large area of the truck bed, reduce load capacity, and struggle with discharging viscous materials, such as moist backfill, leading to inefficiencies in same-day burial construction.
A cargo bed jig with a guide body comprising rotating opening/closing plates and a support system that adjusts the discharge port width, using lubricating sheets to facilitate smooth discharge of materials, and includes stoppers to prevent movement, reducing weight and space occupation.
The jig allows for easier and more efficient loading of cargo directly into narrow excavation trenches, reducing labor and increasing load capacity while ensuring viscous materials are discharged smoothly, thereby enhancing same-day burial efficiency.
Smart Images
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Abstract
Description
Technical Field
[0001] The present invention relates to a jig attached to the cargo bed of a dump truck, and more specifically, to a jig for the cargo bed that can guide the load to a discharge port with a restricted width.
Background Art
[0002] In power plants, electricity of several thousand to several tens of thousands of volts is generated. However, in order to avoid losses due to electrical resistance, it is transmitted at an extra-high voltage of about several hundred thousand volts. Then, the voltage is gradually reduced at each substation such as an extra-high voltage substation, a primary substation, a secondary substation, and a distribution substation, and then supplied to factories and the like. Further, the voltage is reduced by a pole-mounted transformer or the like and supplied to households. In any case, the electricity generated at the power plant is supplied to users via transmission lines and distribution lines (hereinafter, these are collectively referred to as "transmission lines, etc.") using electric wires and cables.
[0003] Among the transmission lines, etc., there are overhead transmission lines, etc. (overhead transmission lines and overhead distribution lines) erected on utility poles and underground transmission lines, etc. (underground transmission lines and underground distribution lines) buried underground. Currently, overhead transmission lines, etc. are overwhelmingly more numerous. Some problems have been pointed out in the power transmission method using utility poles and overhead transmission lines, etc., and in recent years, the undergrounding of overhead transmission lines, etc. has been promoted.
[0004] When overhead transmission lines, etc. are buried underground, not only does the urban landscape improve, but as a result of removing the utility poles, the sidewalk can be used more widely, and baby strollers and wheelchairs can be used more safely. Also, during disasters such as typhoons and earthquakes, it is possible to avoid blocking the road due to utility poles falling or overhead transmission lines, etc. sagging, so emergency vehicles, etc. can also pass smoothly. Furthermore, since the risk of overhead transmission lines, etc. being cut off during disasters, etc. is also reduced, power outages can be suppressed and electricity can be used stably.
[0005] Typically, sidewalks and roadways are used to bury overhead power lines and other utilities. This involves excavating the road, installing pipes, and housing the power lines within them. In this case, since the road needs to be occupied, either entirely or partially, traffic must be closed, and therefore the work must be completed within a short period of time.
[0006] Therefore, when burying overhead power lines and other infrastructure underground, the same-day burial method has become the mainstream approach. This same-day burial method involves completing a series of tasks, including pavement removal, excavation, installation of retaining materials such as lightweight steel sheet piles, piping, backfilling, and pavement restoration, all within a single day.
[0007] Traditionally, backhoes were used for backfilling. That is, backhoes would scoop up the backfill material, such as soil and sand, that had been transported by dump trucks and dump it into the excavated area. As a result, excavation work using backhoes had to be interrupted while backfilling was being carried out. Of course, if one backhoe was prepared for excavation and another for backfilling, the excavation work could not be interrupted, but this would increase the cost of the machinery and the labor costs of the operators, and setting up two backhoes could potentially occupy not only the sidewalk but also part of the roadway.
[0008] Another option is to dump the backfill material directly into the excavation site by raising the truck bed, without using a backhoe. However, in the case of a typical dump truck, the backfill material is discharged when the side panels open, so the width of the dump truck is generally considered the discharge opening. On the other hand, the excavation work is for the purpose of installing pipes, so it is a so-called trench digging, and the width of the excavation trench is extremely narrow compared to the width of the dump truck. Therefore, when the truck bed is dumped, most of the backfill material will spill out without being deposited into the excavation site.
[0009] Patent Document 1 discloses a discharge jig that allows backfill material to be directly dumped into a narrow excavation trench by dumping up the loading platform, and a discharge method using the same. [Prior art documents] [Patent Documents]
[0010] [Patent Document 1] Patent No. 6915777 [Overview of the Initiative] [Problems that the invention aims to solve]
[0011] The discharge jig disclosed in Patent Document 1 forms a discharge port at the rear of the truck bed and is a jig that guides the buried material toward this discharge port when the truck bed is dumped up. The width of this discharge port is approximately the width of the excavation trench, and therefore the buried material is directly deposited into the target excavation trench without spilling.
[0012] Figure 9 is a step diagram illustrating the buried material removal method disclosed in Patent Document 1. As shown in this figure, in this buried material removal method, a dump truck DT can directly load the buried material into the excavated trench without relying on a backhoe BH. As a result, the work area can be divided into blocks, and backfilling work, piping work, and excavation work with a backhoe BH can be carried out in parallel and simultaneously.
[0013] As described above, the invention of Patent Document 1 allows for extremely efficient same-day burial construction, meaning that the amount of work (burial length) per day is dramatically improved compared to conventional technology. However, there was room for improvement in this invention. Specifically, problems such as the heavy weight of the jig requiring considerable effort to attach to the truck bed, the jig occupying a large area of the truck bed reducing the load capacity to about 80%, and the difficulty in discharging backfill material from the truck bed if it is viscous, such as containing moisture, were pointed out, and it was desired to resolve these problems.
[0014] The object of the present invention is to solve the problems of the prior art, namely, to provide a jig for a cargo bed that allows for easier loading of cargo onto the cargo bed directly to the target location compared to the prior art. [Means for solving the problem]
[0015] The present invention utilizes a guide body equipped with a fixed plate and an opening / closing plate, and focuses on the fact that by making the opening / closing plate rotate relative to the fixed plate, the cargo can be discharged more smoothly from the discharge port. This invention is based on an unprecedented idea.
[0016] The cargo bed jig of the present invention is a jig installed on the cargo bed of a dump truck to guide the discharge path of the cargo when dumping, and comprises a left guide body, a right guide body, and a support body. The left guide body consists of a left fixing plate and a left opening / closing plate rotatably connected to the left fixing plate, while the right guide body consists of a right fixing plate and a right opening / closing plate rotatably connected to the right fixing plate. The rod-shaped (or tubular) support body is arranged along the width direction of the vehicle. The left guide body is positioned so that the front end of the left fixing plate abuts against the left side plate of the cargo bed and is inclined towards the center towards the rear in a plan view, and similarly the right guide body is positioned so that the front end of the right fixing plate abuts against the right side plate of the cargo bed and is inclined towards the center towards the rear in a plan view. The support body is inserted through a left opening provided in the left fixing plate and through a right opening provided in the right fixing plate, and is then attached to the left and right sides of the cargo bed. Furthermore, an outlet for the discharged cargo is formed between the rear end of the left opening / closing plate and the rear end of the right opening / closing plate. When the cargo bed is dumped up, the cargo moves backward while being guided towards the center by the left and right guide bodies, and the left and right opening / closing plates rotate outward in accordance with the movement of the cargo.
[0017] The cargo bed jig of the present invention may further be equipped with a connecting rope. This connecting rope can be attached to the left opening / closing plate and can be attached to the right opening / closing plate. The amount of rotation of the left opening / closing plate and the right opening / closing plate is limited by the connecting rope attached to the left opening / closing plate and the right opening / closing plate. Furthermore, the width of the discharge opening can be adjusted by adjusting the length of the connecting rope.
[0018] The cargo bed jig of the present invention may also be configured such that lubricating sheets are attached to the left fixing plate, left opening / closing plate, right fixing plate, and right opening / closing plate. However, the lubricating sheets are attached to the central surface of the cargo bed among the left fixing plate, left opening / closing plate, right fixing plate, and right opening / closing plate. Furthermore, the lubricating sheets are made of a material with lower friction (slippery) than the material forming the left fixing plate, left opening / closing plate, right fixing plate, and right opening / closing plate.
[0019] The cargo bed jig of the present invention may also include a left bottom plate as part of the guide body. More specifically, the left guide body is configured to include a left bottom plate connected to the lower end of the left fixing plate, and the right guide body is configured to include a right bottom plate connected to the lower end of the right fixing plate. The left and right bottom plates are arranged to slope downward toward the center of the cargo bed.
[0020] The loading platform jig of the present invention may further include a left stopper and a right stopper that are slidable along the axial direction of the support. By bringing the left stopper into contact with the left fixing plate from the central side, and the right stopper into contact with the right fixing plate from the central side, the movement of the left fixing plate and the right fixing plate toward the central side can be restricted. [Effects of the Invention]
[0021] The cargo bed jig of the present invention has the following effects: (1) In the prior art, the guide was formed by leg members and plate members, but the guide body of the present invention omits the member corresponding to the leg members, and is therefore lighter than the prior art. As a result, the labor involved in attaching it to the loading platform, removing it, and carrying it can be reduced compared to the prior art. (2) Since there is no member corresponding to the leg member, the area occupied by the loading platform is reduced by that much, that is, more loads can be transported compared to the prior art. (3) By attaching a lubricating sheet to the surface of the guide body, even viscous loads can be smoothly discharged.
Brief Description of the Drawings
[0022] [Figure 1] A plan view schematically showing the loading platform jig of the present invention installed on the loading platform of a dump truck. [Figure 2] (a) is a front view of the left guide body seen from the outside of the loading platform, and (b) is a front view of the left guide body seen from the inside of the loading platform. [Figure 3] (a) is a plan view schematically showing the guide body before the opening / closing plate opens, and (b) is a plan view schematically showing the guide body after the opening / closing plate opens. [Figure 4] (a) is a plan view showing the loading platform jig installed on the loading platform, and (b) is a front view showing the loading platform jig installed on the loading platform. [Figure 5] A perspective view showing a left plate guide body having a left bottom plate and a right guide body having a right bottom plate. [Figure 6] A perspective view showing a support body in which a fixing bar is inserted into a left opening and a right opening and attached to the loading platform by a locking tool. [Figure 7] (a) is a perspective view showing a locking tool attached to the left side plate, and (b) is a front view of the locking tool attached to the left side plate seen from the inside of the loading platform. [Figure 8] A plan view schematically showing a guide body supported from the inside of the loading platform by a left stopper and a right stopper. [Figure 9] A step diagram explaining the method of discharging the embedded material.
Embodiments for Carrying out the Invention
[0023] An example of an embodiment of the cargo bed jig of the present invention will be described with reference to the drawings. The cargo bed jig of the present invention is a jig that is installed on the cargo bed of a dump truck and guides the discharge route of the cargo when the truck is dumped. Various materials can be used as "cargo," such as sand, soil, crushed stone, broken stone, fresh concrete, and small scrap materials, but for convenience, the example described here will be that the cargo is the material used to backfill an excavated trench (hereinafter referred to as "backfill material"). The excavated trench is, for example, used to bury pipes, and is narrower than the width of the dump truck. After the pipes are installed, it is backfilled with backfill material such as soil and crushed stone.
[0024] Figure 1 is a schematic diagram showing the cargo bed jig 100 of the present invention installed on the cargo bed 200 of a dump truck, and is a plan view from above. The cargo bed 200 of a typical dump truck is composed of a floor surface for loading cargo (hereinafter referred to as "cargo bed floor 210"), a left side panel 220, a right side panel 230, a gate 240 positioned near the cabin (driver's seat), and side panels 250 that rotate around a horizontal axis. When the truck is dumped, the cargo bed 200 gradually tilts so that the gate 240 rises, and the side panels 250 rotate, causing the backfill material to be discharged through the gap created between the cargo bed floor 210 and the side panels 250. In other words, the backfill material is discharged over roughly the entire width of the side panels 250.
[0025] For convenience, as shown in Figure 1, the cabin side (upper in the figure) of the cargo bed 200 will be referred to as the "front," and the side with the side panels 250 (lower in the figure) will be referred to as the "rear." The "left side" and "right side" will be used when facing forward. The forward and rear directions will be referred to as the "axis direction," and the left and right directions will be referred to as the "vehicle width direction." The center of the cargo bed 200 in the vehicle width direction will simply be referred to as the "center."
[0026] The cargo bed jig 100 of the present invention is composed of guide bodies 110 arranged on the left and right sides as shown in Figure 1, and a rod-shaped (or tubular) support 120, and may also be composed of connecting ropes, stoppers, etc., as described later. Since the guide bodies 110 are arranged on the left and right sides, the left guide body 110 will be specifically called "left guide body 110L" and the right guide body 110 will be specifically called "right guide body 110R" in order to distinguish them.
[0027] The left guide body 110L is positioned so that its front end abuts against the left side plate 220 and, when viewed from above, slopes towards the center towards the rear. Similarly, the right guide body 110R is positioned so that its front end abuts against the right side plate 230 and, when viewed from above, slopes towards the center towards the rear. The left guide body 110L and the right guide body 110R are positioned so that there is a gap between their respective rear ends, and this gap serves as the cargo outlet (hereinafter referred to as the "discharge port"). By positioning the left guide body 110L and the right guide body 110R so that they slope towards the center towards the rear, the backfill material is guided towards the discharge port when the cargo bed 200 is dumped up. By making the width of the discharge port approximately the same as (or slightly smaller than) the width of the excavation trench, the backfill material discharged from the discharge port is deposited into the excavation trench.
[0028] On the other hand, the support 120 is positioned at the rear of the cargo bed 200, generally along the vehicle width direction. At this time, the support 120 is inserted through openings provided in the left guide body 110L and the right guide body 110R. The support 120 is then attached to the cargo bed 200 by fixing its left end to the left side plate 220 and its right end to the right side plate 230.
[0029] The following will provide a detailed explanation of each of the main components that make up the loading platform jig 100.
[0030] (Guide body) Figure 2 shows the left guide body 110L of the guide body 110, where (a) is a front view of the left guide body 110L (i.e., the outer surface of the left guide body 110L) as seen from the outside of the cargo bed 200 in the vehicle width direction, and (b) is a front view of the left guide body 110L (i.e., the inner surface of the left guide body 110L) as seen from the center of the cargo bed 200 in the vehicle width direction. As shown in this figure, the left guide body 110L and the right guide body 110R have a structure in which two members are connected. That is, the left guide body 110L is composed of a plate-shaped member positioned at the front (hereinafter referred to as "left fixing plate 111L") and a plate-shaped member positioned at the rear (hereinafter referred to as "left opening / closing plate 112L"), and similarly, the right guide body 110R is composed of a plate-shaped member positioned at the front (hereinafter referred to as "right fixing plate 111R") and a plate-shaped member positioned at the rear (hereinafter referred to as "right opening / closing plate 112R").
[0031] Furthermore, the left opening / closing plate 112L and the right opening / closing plate 112R (hereinafter collectively referred to simply as "opening / closing plate 112") are connected to the left fixed plate 111L and the right fixed plate 111R (hereinafter collectively referred to simply as "fixed plate 111") so as to be rotatable. For example, as shown in Figure 2(a), the fixed plate 111 and the opening / closing plate 112 can be connected using a hinge 114. Of course, as long as the fixed plate 111 and the opening / closing plate 112 can be connected in a hinge structure, various conventionally used components can be used, not just the hinge 114. However, as shown in Figure 2(a), it is preferable to provide hinge components such as the hinge 114 on the outer surface of the guide body 110. If they are provided on the inner surface, the backfill material will repeatedly come into contact with the hinge 114, which may cause clogging and prevent the hinge structure from functioning.
[0032] Figure 3 schematically shows the situation in which the opening / closing plate 112 rotates relative to the fixed plate 111, where (a) is a top view of the guide body 110 before the opening / closing plate 112 opens, and (b) is a top view of the guide body 110 after the opening / closing plate 112 opens. When not dumped up, as shown in Figure 3(a), the opening / closing plate 112 is positioned slightly toward the center, and a relatively narrow discharge opening is formed at the rear end of the opening / closing plate 112. On the other hand, when dumped up, as shown in Figure 3(b), the opening / closing plate 112 rotates to open outwards, and a wider discharge opening is formed than in Figure 3(a). When not dumped up, that is, when stacked flat, the weight of the backfill material does not act on the opening / closing plate 112, so the opening / closing plate 112 does not rotate. However, when dumped up, the weight of the backfill material acts on the opening / closing plate 112, causing it to rotate.
[0033] By the way, if the opening / closing plate 112 is designed to rotate freely, it may rotate until it is facing vertically downwards when the dump truck is opened. Of course, there is no problem if the width of the discharge opening formed by the vertically downward-facing opening / closing plate 112 is as planned, but in some cases the width of that discharge opening may be a little too large. For example, if the opening / closing plate 112 is facing vertically downwards, the discharge opening may become larger than the width of the excavation trench, and it is possible that not all of the backfill material will be put into the excavation trench.
[0034] In this case, it is preferable to restrict the rotation of the opening / closing plate 112 using a connecting rope 130 as shown in Figure 4. Figure 4 shows a cargo bed jig 100 installed on the cargo bed 200, where (a) is a plan view seen from above and (b) is a front view seen from the rear. This connecting rope 130 is a rope-like member such as a chain or rope, and can be attached to the left opening / closing plate 112L and the right opening / closing plate 112R.
[0035] For example, as shown in Figure 4(a), the rotation of the opening / closing plate 112 is restricted by attaching the left end of the connecting rope 130 to the rear end of the left opening / closing plate 112L and the right end of the connecting rope 130 to the rear end of the right opening / closing plate 112R. More specifically, the opening / closing plate 112 can rotate freely until the gap between the rear end of the left opening / closing plate 112L and the rear end of the right opening / closing plate 112R is equal to the total length of the connecting rope 130. However, once the gap reaches the total length of the connecting rope 130, the opening / closing plate 112 is constrained and further rotation is restricted. In other words, the length of the connecting rope 130 (actually, the distance between the mounting position of the left opening / closing plate 112L and the mounting position of the right opening / closing plate 112R) becomes the width dimension of the discharge port when the dump truck is raised. In other words, the width dimension of the discharge port can be adjusted by adjusting the length of the connecting rope 130. When adjusting the length of the connecting rope 130, it is possible to configure the rope so that it can be attached to the opening / closing plate 112 at any position, or to prepare multiple types of connecting ropes 130 with different lengths and select the desired connecting rope 130.
[0036] The left fixing plate 111L is provided with an opening (hereinafter referred to as the "left opening 113L") for inserting a rod-shaped (or tubular) support 120, and similarly, the right fixing plate 111R is provided with an opening (hereinafter referred to as the "right opening 113R") for inserting the support 120. These left opening 113L and right opening 113R (hereinafter collectively referred to simply as the "opening 113") can be in the shape of a notch with an open top, as shown in Figure 2, or they can be through holes carved out in the shape of a circle or a square.
[0037] The left guide body 110L and the right guide body 110R may also be equipped with a plate-shaped member that constitutes the bottom (hereinafter referred to as "bottom plate 116"). More specifically, as shown in Figure 5, the left bottom plate 116L is connected to the lower end of the left fixing plate 111L of the left guide body 110L, and the right bottom plate 116R is connected to the lower end of the right fixing plate 111R of the right guide body 110R. The bottom plate 116 is arranged to slope downward toward the center of the cargo bed 200 (in a slope shape). In other words, in this case, the fixing plate 111 is arranged to float above the cargo bed floor 210, and the bottom plate 116 is arranged so that one end is connected to the lower end of the fixing plate 111, and the other end is in contact with the cargo bed floor 210. By providing a slope-shaped bottom plate 116, it is possible to suppress the situation in which backfill material enters the gap between the cargo bed floor 210 and the guide body 110 when dumping up, that is, more backfill material can be discharged.
[0038] The fixing plate 111 and opening / closing plate 112 should be made of a material with considerable strength, such as steel or resin, so that they can withstand the weight of the backfill material that acts on them when the dump truck is opened. However, with fixing plates 111, etc. made of steel or resin, if the backfill material contains moisture or has high viscosity, the backfill material may adhere to the surface of the fixing plate 111, etc., and not all of the backfill material may be sufficiently discharged. Therefore, when there is a risk of backfill material adhering, it is advisable to attach a thin-walled member such as a sheet material (hereinafter referred to as "lubricating sheet 140") to the surface of the fixing plate 111 and opening / closing plate 112, as shown in Figure 2(b). This lubricating sheet 140 is made of a material with lower friction (smaller coefficient of friction) than the material that forms the fixing plate 111 and opening / closing plate 112, and is naturally attached to the surface (so to speak, the inner surface) of the fixing plate 111 and opening / closing plate 112 on the central side of the cargo bed 200. Furthermore, the lubricating sheet 140 can also be attached to the upper surface of the bottom plate 116.
[0039] (Support) As shown in Figure 4(a), the support body 120 is composed of a rod-shaped (or tubular) fixing bar 121 and a locking device 122, and is a member that supports the guide body 110 (left guide body 110L and right guide body 110R). The guide body 110 is simply placed on the cargo bed floor 210 and is not fixed to the cargo bed 200. Therefore, when the truck is dumped up, the guide body 110 moves downward and eventually falls off the cargo bed 200. The support body 120 prevents the guide body 110 from falling by supporting it. Specifically, as shown in Figure 6, the fixing bar 121 is inserted through the left opening 113L and the right opening 113R, and then the fixing bar 121 is attached to the cargo bed 200 by the locking device 122.
[0040] The locking device 122 is attached to both the left side plate 220 and the right side plate 230. Figure 7 shows the locking device 122 attached to the left side plate 220, where (a) is a perspective view from the front and (b) is a front view from the center of the loading platform 200. The locking device 122 shown in this figure consists of a key-shaped locking hook 122F and a plate-shaped locking plate 122P. The procedure for attaching the support 120 to the loading platform 200 using this locking device 122 will be described below.
[0041] First, the locking hook 122F is fitted into the left side plate 220, and the locking device 122 is secured to the left side plate 220 by tightening bolts and pins. Similarly, the locking hook 122F is also secured to the right side plate 230. As a result, as shown in Figure 7(b), the fitting hole 122H provided in the locking plate 122P is positioned to face the center of the cargo bed 200. Then, the fixing bar 121 is attached to the left and right locking devices 122 using this fitting hole 122H. Specifically, the projection provided at the left end of the fixing bar 121 is fitted into the fitting hole 122H in the left side plate 220, and the projection provided at the right end of the fixing bar 121 is fitted into the fitting hole 122H in the right side plate 230, thereby attaching the fixing bar 121 to the locking device 122. At this time, it is preferable to first insert the fixing bar 121 through the left opening 113L and the right opening 113R, and then attach the fixing bar 121 to the locking device 122. Note that the locking device 122 shown in Figure 7 is merely an example, and various locking devices 122 can be used as long as the fixing bar 121 inserted through the left opening 113L and the right opening 113R can be attached to the cargo bed 200.
[0042] The fixing bar 121 should be made extendable so that its length can be changed. For example, multiple pipes of different diameters can be used, with the smaller diameter pipes housed within the larger diameter pipes. In other words, the length of the fixing bar 121 is adjusted by adjusting the length by which the smaller diameter pipes are pulled out from the larger diameter pipes. In addition, a mechanism for fixing the smaller diameter pipes to the larger diameter pipes, such as by tightening them with bolts or pins, should be provided to maintain the adjusted length. Alternatively, as shown in Figure 2(a), the guide body 110 can be equipped with a support column 115, and the fixing bar 121, which is inserted through the left opening 113L and the right opening 113R, can be supported by this support column 115.
[0043] As described above, since the fixing bars 121 inserted through the left opening 113L and the right opening 113R are fixed to the cargo bed 200, the movement of the left guide body 110L (especially the left fixing plate 111L) and the right guide body 110R (especially the right fixing plate 111R) in the axle direction is restricted. On the other hand, the movement of the left guide body 110L and the right guide body 110R in the width direction is not restricted, so they can move freely in the width direction, especially when the opening 113 is sufficiently large relative to the outer diameter of the fixing bar 121 (i.e., there is a considerable gap between the fixing bar 121 and the opening 113). In this case, when the dump is raised and the backfill material moves to the rear, the guide body 110 may not function properly, and the backfill material may not be guided towards the center of the cargo bed 200.
[0044] Therefore, in cases where the guide body 110 is prone to moving in the vehicle width direction, it is advisable to use the stopper 150 shown in Figure 8. Figure 8 is a schematic plan view showing the guide body 110 supported from the center side of the cargo bed 200 by the left stopper 150 (hereinafter specifically referred to as "left stopper 150L") and the right stopper 150 (hereinafter specifically referred to as "right stopper 150R").
[0045] First, the left stopper 150L is slid to the left until the contact material contacts the left fixing plate 111L (inner surface). Next, the right stopper 150R is slid to the right until the contact material contacts the right fixing plate 111R (inner surface). The situation where the contact material contacts the left fixing plate 111L and the right fixing plate 111R is shown in the area enclosed by the dashed line in Figure 8. Then, the left stopper 150L is fixed to the fixing bar 121 by tightening it with bolts or pins to prevent it from moving to the right, and similarly, the right stopper 150R is fixed to the fixing bar 121 by tightening it with bolts or pins to prevent it from moving to the left. This restricts the movement of the guide body 110 in the vehicle width direction (at least towards the center of the loading bed 200), meaning that when dumped up, the backfill material is properly guided towards the center of the loading bed 200. [Industrial applicability]
[0046] The cargo bed jig of the present invention can be used when burying various linear objects underground, including power transmission lines, distribution lines, and information and communication lines. According to the present invention, undergrounding of power lines can be achieved efficiently and at low cost, and considering that this will contribute to promoting the undergrounding of power lines, it is an invention that can be expected to make a significant contribution not only to industrial use but also to society. [Explanation of Symbols]
[0047] 100 Jig for cargo bed of the present invention 110 Guide body (for loading platform fixtures) 111 (Guide body) fixing plate 112 (Guide body) opening / closing plate 113 (Opening of the guide body) 114 (Guide body) hinge 115 (Support column of the guide body) 116 (Guide body) base plate 110L (Left guide body of the guide body) 111L (Left guide body) Left fixing plate 112L (Left guide body) Left opening / closing plate 113L (Left opening of the left guide body) 116L (Left guide body) Left bottom plate 110R (of the guide bodies) Right guide body 111R (Right guide body) Right fixing plate 112R (Right guide body) Right opening / closing plate 113R (Right guide body) Right opening 116R (Right guide body) Right base plate 120 (Support for a jig for a loading platform) 121 (Support) Fixing bar 122 (Support) fasteners 122F Locking hook (of a locking device) 122H (for locking device) fitting hole 122P (Locking plate of a locking device) 130 (Connecting rope for loading platform fixtures) 140 (Lubrication sheet for loading platform fixtures) 150 (Stopper for loading platform fixtures) 150L (Left stopper of the stoppers) 150R (Right stopper of the stoppers) 200 (Dump truck) bed 210 (Cargo bed) Cargo bed floor 220 (Left side panel of the cargo bed) 230 (Right side panel of the cargo bed) 240 (Torii gate on the cargo bed) 250 (Tailgate) BH Backhoe DT Dump Truck
Claims
1. A jig installed on the bed of a dump truck to guide the discharge route of the loaded cargo when it is dumped up, A left guide body comprising a left fixing plate and a left opening / closing plate rotatably connected to the left fixing plate, A right guide body comprising a right fixing plate and a right opening / closing plate rotatably connected to the right fixing plate, It comprises a rod-shaped or tubular support arranged along the width direction of the vehicle, The left guide body is positioned such that the front end of the left fixing plate abuts against the left side plate of the cargo bed, and is inclined towards the rear towards the center in a plan view. The right guide body is positioned such that the front end of the right fixing plate abuts against the right side plate of the cargo bed, and is inclined towards the center towards the rear in a plan view. The support is inserted through the left opening provided in the left fixing plate and through the right opening provided in the right fixing plate, and then attached to the right side plate and the right side plate of the cargo bed. An outlet for the discharge of the cargo is formed between the rear end of the left opening / closing plate and the rear end of the right opening / closing plate. When the loading platform is dumped up, the load is guided towards the center by the left guide body and the right guide body and moves backward, and the left opening / closing plate and the right opening / closing plate rotate outward in accordance with the movement of the load. A jig for loading platforms characterized by the following features.
2. The system further includes a connecting cable that can be attached to the left opening / closing plate and can be attached to the right opening / closing plate, The amount of rotation of the left opening / closing plate and the right opening / closing plate is limited by the connecting cable attached to the left opening / closing plate and the right opening / closing plate. The cargo bed jig according to claim 1.
3. Of the left fixing plate, the left opening / closing plate, the right fixing plate, and the right opening / closing plate, a lubricating sheet is attached to the central surface of the cargo bed. The lubricating sheet is made of a material with lower friction than the material forming the left fixing plate, the left opening / closing plate, the right fixing plate, and the right opening / closing plate. The cargo bed jig according to claim 1.
4. The left guide body further includes a left bottom plate connected to the lower end of the left fixing plate, The right guide body further includes a right bottom plate connected to the lower end of the right fixing plate, The left bottom plate and the right bottom plate are arranged to slope downward toward the center of the cargo bed. The cargo bed jig according to claim 1.
5. The support further comprises a left stopper and a right stopper that are slidable along the axial direction of the support, The movement of the left and right fixing plates toward the center is restricted by bringing the left stopper into contact with the left fixing plate from the center side, and bringing the right stopper into contact with the right fixing plate from the center side. The cargo bed jig according to claim 1.