dump truck

Abstract

To provide a loading platform for a conveying vehicle capable of selectively using a tail gate and a support metal fitting while utilizing characteristics of the conveying vehicle according to the purpose of use so as to be utilized for both conveyance using the support metal fitting and conveyance of earth and sand or the like.SOLUTION: A loading platform for a conveying vehicle includes a floor plate, right and left side plates, and a tail gate. In the tail gate, an upper part is rotated around a rotation shaft in a lower part and inclined backward such that the posture is displaced to a falling-down position from a standing position. A fixing part for fixing a support metal fitting which is an optional part is also included. An installation space for the support metal fitting fixed by the fixing part is overlapped with the standing position of the tail gate.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention is To Regarding. [Background technology]

[0002] Transport vehicles such as dump trucks are highly versatile and can be used to transport a variety of loads.

[0003] Furthermore, a technique has been disclosed in which a post-installed support post is erected on the side of the loading platform to prevent the load placed on the loading platform of a transport vehicle from collapsing (Patent Document 1, etc.). [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Patent No. 6892658 Summary of the Invention [Problem to be solved by the invention]

[0005] The inventors of the present application have noticed that while such transport vehicles are highly versatile in terms of their configuration, there are various regulations depending on the application, and there is still room for improvement in terms of fully utilizing the characteristics of the transport vehicles' configuration. For example, in transport vehicles used for transporting soil, gravel, crushed stone, concrete rubble, etc. (hereinafter referred to as soil and sand, etc.), the use of devices that can contribute to compensating for the load capacity of the loading platform, such as the support post in Patent Document 1, is not permitted by law. Therefore, it is difficult to utilize devices (metal fittings) such as support posts even in situations where the vehicle is not being used for transporting soil and sand, etc.

[0006] The object of the present invention is to make it possible to selectively use a tailgate and a support bracket while taking advantage of the characteristics of the transport vehicle according to the purpose, and to use it for transporting both with the support bracket and for transporting earth and sand. dump truck The purpose is to provide [Means for solving the problem]

[0007] In order to achieve the above object, the present invention provides: The chassis and It has a floor board, left and right side boards and a tailgate. a loading platform; and a tilting device that tilts the loading platform relative to the chassis; The tailgate but The upper part rotates around the lower rotation axis, and the posture is changed from an upright position to a lying position by tilting backward. In a dump truck , The tailgate is used when loading a second load having different properties from the first load that is loaded and dumped in an upright position. It is equipped with a fixing part for fixing the support post that extends in the vertical direction, which is an optional part. the support post extends upward to a height exceeding the upper edges of the left and right side panels when fixed to the fixing portion, but is configured so as not to protrude entirely rearward from the rear edge of the collapsed tailgate, The fixing portions are holes provided in the left and right side plates so as to overlap the standing position of the tailgate or be positioned rearward of it when viewed from the vehicle width direction, and an installation space for the support post fixed by the hole overlaps with the standing position of the tailgate, so that the tailgate and the support post can be used alternatively. dump truck to provide. [Effects of the Invention]

[0008] According to the present invention, the tailgate and the support brackets can be selectively used, and the vehicle can be used for transporting materials such as earth and sand, as well as for transporting materials using support brackets (e.g., support posts). For example, when transporting long lumber, the tailgate can be placed in a collapsed position, allowing the support brackets to be used in the space when the tailgate is in an upright position. In other words, the vehicle can be configured to utilize the support brackets when the purpose of transporting lumber, rather than earth and sand, is clear, further improving its versatility as a transport vehicle. [Brief explanation of the drawings]

[0009] [Figure 1] 1 is a side view of a dump truck, which is an example of a transport vehicle to which a transport vehicle loading platform according to an embodiment of the present invention is applied; [Figure 2] FIG. 1 is a rear view of a dump truck, which is an example of a transport vehicle to which a transport vehicle loading platform according to an embodiment of the present invention is applied. [Figure 3] An explanatory diagram of the dump truck shown in Figure 1 being used to transport earth and sand, etc. [Figure 4] FIG. 1 is a perspective view of a rear portion of a side plate of a platform for a transport vehicle according to an embodiment of the present invention; [Figure 5] FIG. 1 is a perspective view of a support post, which is an optional part for a platform for a transport vehicle according to an embodiment of the present invention; [Figure 6] FIG. 10 is a perspective view of a rear portion of a side plate of a platform for a transport vehicle according to a modified example of the present invention; [Figure 7] FIG. 10 is a perspective view of a support post, which is an optional part for a platform for a transport vehicle according to a modified example of the present invention; [Figure 8] FIG. 10 is a perspective view of a support post, which is an optional part for a platform for a transport vehicle according to another modification of the present invention; [Figure 9] Enlarged rear view of part IX in Figure 8 DETAILED DESCRIPTION OF THE INVENTION

[0010] Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

[0011] -Transport vehicle- Fig. 1 is a side view of a dump truck, which is an example of a transporter to which a transporter bed according to one embodiment of the present invention is applied, and Fig. 2 is a rear view. Fig. 4 is a diagram showing the state in which the tailgate of the bed of the dump truck in Fig. 1 is raised. Hereinafter, the left and right in Fig. 1 will be referred to as the front and rear of the dump truck. Note that the bed according to the present invention is not limited to dump trucks, but can also be applied to trucks and crawler carriers whose beds are stationary.

[0012] The dump truck shown in Figures 1 and 2 includes a chassis 1, a loading platform 10, a tilting device (not shown), etc. The chassis 1 is the vehicle portion of the dump truck, and is configured to include a cab 2 and a chassis frame (car frame) 3 connected to the rear of the cab 2. The chassis frame 3 includes left and right main frames 4 extending in the front-to-rear direction, and a plurality of cross members 5 (Figure 2) connecting the left and right main frames 4. Although not specifically shown, the chassis 1 is equipped with an engine (prime mover) and a transmission connected to the engine via a clutch, and the driving force of the engine is transmitted via the transmission to the drive train of the drive wheels to enable the vehicle to travel.

[0013] The lower rear portion of the loading platform 10 is rotatably connected to the chassis frame 3 via axle 6. Axle 6 connects the loading platform 10 to the main frame 4 of the chassis frame 3 with its central axis extended to the left and right. The loading platform 10 and chassis frame 3 are also connected by a tilting device separate from the axle 6. The extension and contraction of a tilting cylinder (not shown) provided on the tilting device causes the loading platform 10 to tilt relative to the chassis frame 3 with the axle 6 as a fulcrum, allowing the loading platform 10 to stand up diagonally or to lie down horizontally as shown in Figure 1. The tilting cylinder extends and contracts using pressurized oil from a hydraulic pump (not shown) mounted on the chassis frame 3.

[0014] -Cargo bed- The cargo bed 10 has a floor panel 11, left and right side panels 12, and a tailgate (rear gate) 13. The cargo bed 10 can also be fitted with left and right support brackets, specifically support posts 20 extending vertically, as optional parts (genuine products).

[0015] The floor plate 11 is horizontal when the dump truck is placed on level ground with the loading platform 10 lying down.

[0016] The left and right side panels 12 rise from the left and right edges of the floor panel 11. In the case of the dump truck illustrated in Fig. 1, the left and right side panels 12 are each divided into three parts, a front section 15, a rear section 16, and a center section 17. The front sections 15 and rear sections 16 of each side panel 12 are fixed to the floor panel 11. In contrast, the center section 17 between the front sections 15 and rear sections 16 of each side panel 12 forms a gate door whose lower part is rotatably connected to the floor panel 11 via a hinge, and which opens outward in the vehicle width direction by releasing the connection between the front section 15 and rear section 16.

[0017] The tailgate 13 is configured so that its upper portion rotates around a rotation axis at its lower portion, and it is displaced by tilting backward from an upright position (two-dot chain line in FIG. 1) to a laid-down position (solid line in FIG. 1). FIG. 1 shows the tailgate 13 in the laid-down position, and FIG. 3 shows the tailgate 13 in the upright position.

[0018] In this embodiment, the upright position of the tailgate 13 (in other words, the tailgate 13 in the upright position shown in Fig. 3) is tilted backward from the vertical when viewed from the left and right as shown in Fig. 1. The tilt angle of the upright position of the tailgate 13 is appropriately set and changed in relation to other elements, and the upright position of the tailgate 13 may also be set vertically.

[0019] Here, rear portions 16 of the left and right side panels 12 are provided with holes 18 as fixing portions for fixing support posts 20, which are optional parts (FIG. 3). These holes 18 (fixing portions of the support posts 20) are provided so as to be located rearward of the upright position of the tailgate 13 (the two-dot chain line in FIG. 1) when viewed from the vehicle width direction (a position overlapping below the upright position of the rearwardly tilted tailgate 13 when viewed from above). However, the position of the holes 18 can also be set to a position overlapping partially or entirely with the upright position of the tailgate 13 when viewed from the vehicle width direction, or a position circumscribing the upright position of the tailgate 13.

[0020] -Support Post- Fig. 4 is a perspective view of the rear 16 of the side panel 12 of the cargo bed 10, and Fig. 5 is a perspective view of the support post 20. Fig. 5 shows the left support post 20, but the right support post 20 has a symmetrical configuration to the left support post 20.

[0021] The support post 20 is configured to include a post body 21 and a support 22. The material and shape of the post body 21 and the support 22 can be changed as appropriate, but in this embodiment, they are made of general-purpose structural steel and are formed into an L-shape when viewed from the vehicle width direction (FIGS. 1 and 5).

[0022] The post body 21 is the main body of the support post 20 and extends linearly up and down (e.g., vertically). In this embodiment, the post body 21 is made of an H-shaped steel. The support 22 is welded to the lower end of the side surface of the post body 21 on the inside in the vehicle width direction and extends rearward (e.g., horizontally). Although a configuration in which the support 22 extends forward of the post body 21 is also conceivable, this embodiment illustrates a configuration in which the support 22 extends rearward so that the support post 20 (at least the support 22) does not overlap the upper surface of the floor board 11 of the cargo bed 10 when the support post 20 is attached. This is to ensure a large floor area of ​​the cargo bed 10. In this embodiment, the support 22 is made of a channel steel. The channel steel is used in an orientation in which the channel cross section opens upward (Figure 5). In addition, the front-to-rear length of the support 22 is set according to the dimensions of the tailgate 13, etc., so that when the support post 20 is attached to the side panel 12 of the cargo bed 10, it does not protrude rearward from the rear edge of the collapsed tailgate 13.

[0023] In this embodiment, one flange (the outer flange in the vehicle width direction) and web of the H-shaped steel beam are cut and removed a set distance from the bottom end of the post body 21, and a step is formed between the upper part 23 with an H-shaped cross section and the flat lower part 24 when viewed from the front and rear (FIG. 2). This step corresponds to the shape of the rear part 16 of the side panel 12 of the loading platform 10, with the lower end surface of the upper part 23 forming seating surface 25, the outer side of the lower part 24 in the vehicle width direction (opposite the support 22) forming seating surface 26, and the lower end surface of the support post 20 (the lower surface of the support 22) forming seating surface 27. Specifically, the distance between seating surfaces 25, 27 is set to match the distance from the top surface of the floor panel 11 of the loading platform 10 to the top surface of the rear part 16 of the side panel 12.

[0024] A hole 28 (Fig. 5) is provided in the lower part of the support post 20, and the position of this hole 28 is aligned with the position of hole 18 (Fig. 4) in the side panel 12 of the cargo bed 10, and the support post 20 is fixed to the cargo bed 10 with fasteners F (Fig. 1), such as bolts and nuts. When fasteners F are bolts and nuts, the support post 20 is fixed to the cargo bed 10 by tightening the nuts onto the bolts that have been passed through holes 18, 28. When the support post 20 is fixed to the cargo bed 10 in this way, as shown in Fig. 2, the seating surface 26 of the support post 20 faces (preferably makes surface contact with) the inner side surface in the vehicle width direction of the rear portion 16 of the side panel 12, the seating surface 25 faces the upper end surface of the side panel 12, and the seating surface 27 faces the upper surface of the lowered tailgate 13.

[0025] In this case, the cargo bed 10 is configured so that the installation space (corresponding to the space where the support post 20 exists in FIG. 1 ) for the support post 20, which is fixed to the side panel 12 of the cargo bed 10 by fasteners F at holes 18 and 28, overlaps with the tailgate 13 in its upright position (shown by the two-dot chain line in FIG. 1 ) ( FIG. 1 ). In this way, when the tailgate 13 of the cargo bed 10 is in its upright position, the tailgate 13 interferes and the support post 20 cannot be attached to the side panel 12; therefore, in order to attach the support post 20 to the side panel 12, the tailgate 13 must be in its lowered position ( FIG. 1 ). Conversely, with the cargo bed 10 having the support post 20 attached, the tailgate 13 cannot be moved to the upright position; to move the tailgate 13 to the upright position, the support post 20 must be removed. In this way, the cargo bed 10 is configured so that the tailgate 13 and the support post 20 cannot be used simultaneously, and the use of the tailgate 13 and the support post 20 is selective.

[0026] -How to use the loading platform- (1) When transporting soil, sand, etc. When a dump truck is used to transport earth and sand, the tailgate 13 is locked in the upright position as shown in Figure 3. This allows earth and sand to be loaded onto the loading platform 10 using heavy machinery such as a hydraulic excavator.

[0027] (2) When transporting lumber, etc. For example, when a dump truck is used to transport lumber or the like, as shown in Figure 1, the tailgate 13 is lowered to the lowered position, and support posts 20 are attached to the left and right side panels 12 of the loading platform 10. This allows the support posts 20 to prevent the load of lumber or other cargo loaded on the loading platform 10 from shifting, and the support posts 20 can also be used to tie down the cargo with ropes, wires, or the like.

[0028] -effect- (1) As described above, when a dump truck is used to load lumber or the like onto the bed 10, the support posts 20 can be attached and used to prevent the load from shifting and to tie down the load. On the other hand, when a dump truck is used to transport earth and sand, the support posts 20 can be removed and the tailgate 13 placed in an upright position, allowing earth and sand to be loaded onto the bed 10. The tailgate 13 and the support posts 20 can only be used selectively, and the tailgate 13 must be folded down to attach the support posts 20. Furthermore, when the tailgate 13 is folded down, there is no pressure and earth and sand cannot be loaded onto the bed 10. In other words, the support posts 20 cannot be used when transporting earth and sand.

[0029] In this way, the loading platform 10 of this embodiment can selectively use the tailgate 13 and the support post 20, and can be used for transporting materials using the support post 20 as well as for transporting earth and sand, etc. Therefore, by clearly using the dump truck for different purposes, its versatility is greatly improved.

[0030] (2) In this embodiment, because the tailgate 13 is configured to tilt backward when in the upright position, providing the holes 18 at or behind (below) the upright position of the tailgate 13 ensures the use of support fittings other than the optional support post 20. For example, even if a support post A (not shown) with a different shape is used as a substitute (non-genuine product) for the optional support post 20, the layout of the holes 18 inevitably forces the tailgate 13 to be tilted. Therefore, even the substitute support post A cannot be used when transporting earth and sand, etc. (when the tailgate 13 is in the upright position). Therefore, the substitute support post A can be used in the same way as the optional support post 20.

[0031] (3) When the hole 18 is provided at or behind the raised position of the tailgate 13, when the tailgate 13 is raised, the hole 18 is outside the volume range of the cargo bed 10, so that fine particles of cargo such as soil will not spill out of the hole 18.

[0032] (4) The support post 20 faces or comes into surface contact with the upper surface and side panel 12 of the tailgate 13 in the collapsed position due to the seat surfaces 25-27. Therefore, even when the dump truck is traveling, for example, these seat surfaces 25-27 can suppress the swinging of the support post 20 in the forward, backward, left and right directions.

[0033] -Variations- The structure and fixing method of the support post 20 can be modified in design as long as the installation space for the support post 20 overlaps with the upright position of the tailgate 13.

[0034] As one example, as shown in Figures 6 and 7, a configuration is possible in which an L-shaped lever 29 is provided on the support post 20 and the hole 18 in the side panel 12 of the loading platform 10 is replaced with an elongated hole. In this example, the lever 29 is passed through the hole 18, the support post 20 is placed in a predetermined installation space, and when the lever 29 is turned, the support post 20 is restrained and fixed to the side panel 12. Note that Figures 6 and 7 correspond to Figures 4 and 5, and elements in Figures 6 and 7 that are the same as or correspond to those in the embodiment of Figures 1 to 5 are designated by the same reference numerals as those in the previously mentioned drawings, and description thereof will be omitted.

[0035] Another example is the configuration shown in FIGS. 8 and 9 . FIG. 8 corresponds to FIG. 5 , and FIG. 9 is an enlarged view of section IX in FIG. 8 as viewed from the rear. The support post 20 shown in FIGS. 8 and 9 is configured by connecting left and right post bodies 21 with a cross member 30 extending laterally, and a support 22 is connected to the rear of the cross member 30. Pins 31 are provided at the bottom of the left and right post bodies 21, and are movable outward in the vehicle width direction relative to the post bodies 21. These pins 31 are inserted into holes 18 ( FIG. 4 ) in the left and right side panels 12 of the loading platform 10, thereby fixing the support post 20 in place. The pin 31 shown in FIG. 9 has an L-shaped handle located between the flanges of the H-shaped steel beams that make up the post body 21. The handle can be operated to move the pin 31 back and forth relative to the post body 21 as indicated by arrow X in FIG. 9 , or the handle can be rotated a predetermined angle around the central axis of the pin 31 as indicated by arrow θ in FIG. 9 to restrict the movement of the pin 31 in the forward and backward directions.

[0036] Additionally, the layout of the holes 18 can be changed as appropriate depending on the configuration of the support post 20, as long as the installation space for the support post 20 meets the condition that it overlaps with the upright position of the tailgate 13. Furthermore, the fixing portion of the support post 20 is not necessarily limited to the holes 18, and other shapes such as projections and recesses that engage with the support post 20 can also be employed. Furthermore, the shape of the support fitting is not limited to a shape that extends vertically (post-shaped support post 20), and may be any shape that is suitable for use with a dump truck. [Explanation of symbols]

[0037] 10... Loading platform (loading platform for transport vehicle), 11... Floor board, 12... Side board, 13... Tailgate, 18... Hole (fixing part), 20... Support post (support bracket)

Claims

1. A dump truck comprising a chassis, a loading platform having a floor panel, left and right side panels and a tailgate, and a tilting device for tilting the loading platform relative to the chassis, wherein the tailgate is configured so that its upper portion rotates around a rotation axis at its lower portion and it can tilt backward from an upright position to a lying position, The tailgate is provided with a fixing portion for fixing a support post extending in the vertical direction, which is an optional part used when loading a second load having properties different from the first load that is loaded and dumped with the tailgate in an upright position, the support post extends upward to a height exceeding the upper edges of the left and right side panels when fixed to the fixing portion, but is configured so as not to protrude entirely rearward from the rear edge of the tailgate when it is laid down, the fixing portions are holes provided in the left and right side plates so as to overlap with or be positioned rearward of the upright position of the tailgate as viewed in the vehicle width direction, A dump truck characterized in that the installation space of the support post fixed by the hole overlaps with the upright position of the tailgate, making it possible to selectively use the tailgate and the support post.

2. The dump truck of claim 1, The support post is provided. The dump truck is characterized in that the support post is configured to be in surface contact with the upper surface or the side panel of the tailgate when in the collapsed position.

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