Sheet covering device for load-carrying platform of truck

Abstract

To provide a sheet covering device for a load-carrying platform of a truck that can smoothly accommodate increase and decrease in cargo volume and can also be applied to existing trucks.SOLUTION: A sheet covering device comprises, as a pair in the vehicle width direction, a front multi-stage cylinder 4 and a rear multi-stage cylinder 5 which are mounted on the vehicle front and rear sides of a load-carrying platform, respectively, and rope moving means in which a rope 7 from a rear winch fixed to the rear outer side of the load-carrying platform is engaged with the engagement portion 55 of the rear multi-stage cylinder and the engagement portion 45 of the front multi-stage cylinder, connected to a front winch 6A fixed to the front outer side of the load-carrying platform, and wound and moved by the front winch or the rear winch. The sheet covering device also includes a belt-shaped member 8 whose both ends can be detachably attached the rope. At the rear region of the load-carrying platform, a pull-out end 9a of a sheet 9 is locked to the belt-shaped member, and by rotating the front winch, the sheet 9 is drawn from the rear side and applied to the load-carrying platform of the truck. Alternatively, at the front region of the load-carrying platform, the pull-out end 9a of the sheet 9 is locked to the belt-shaped member, and by rotating the rear winch, the sheet 9 is drawn from the front side and applied to the load-carrying platform of the truck.SELECTED DRAWING: Figure 11

Description

Technical Field

[0001] The present invention relates to a seat hanging device for a truck bed that hangs a seat on the truck bed.

Background Art

[0002] With the advent of wing body trucks, the driver has been liberated from the seat hanging work. However, in the case of flatbed trucks, which are in the minority, the conventional seat hanging work is still carried out. Seat hanging is an operation performed after loading the goods, tying the load, and tightening the lashing. The seat is basically wound in one direction and is usually extended from the front of the bed toward the rear of the bed. The driver has to walk somewhere from the front to the rear of the bed to extend the seat, and has to search for a space to walk on the bed with the load. In the case of a tall load, a gate lashing is required, and in some cases, the driver has to climb onto the gate. Moreover, a seat covering the bed of a large vehicle weighs about 25 kg to 40 kg, making it a heavy and dangerous operation. Under these circumstances, a seat hanging device for a truck bed that can perform seat hanging on the truck bed with good workability and safety has been proposed (for example, Patent Document 1).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, Patent Document 1 has, as described in claim 1 thereof, a configuration requirement of "an L-shaped seat holding arm that holds a seat to be hung on a truck bed and is formed to be rotatable", and it is difficult to cope with changes in the load capacity. In addition, it is stated that "the L-shaped sheet holding arm holding the above sheet is fixed to the own device and the side surface of the truck is moved from the rear to the front of the truck." However, since the L-shaped sheet holding arm with a heavy sheet placed on it is cantilevered and supported by the own device and further by wheels, the structure is unstable and prone to failure. Furthermore, it is stated that "wheels that run on the side surface of the truck." However, in order for the wheels to run on the side surface of the truck, it may be necessary to change to a dedicated member for the side surface of the truck on which the wheels can run, as it cannot be satisfied by a general-purpose side runner.

[0005] The present invention solves the above problems, and an object thereof is to provide a sheet hanging device for a truck bed that can smoothly respond to changes in the size of the loading capacity, has a structure with few failures, and is also applicable to existing trucks.

Means for Solving the Problems

[0006] To achieve the above object, a first aspect of the present invention includes a front multi-stage cylinder mounted on the front side of the vehicle of the truck bed such that a rod provided with an engaging portion at its tip extends upward, and a rear multi-stage cylinder mounted on the rear side of the vehicle of the truck bed such that a rod provided with an engaging portion at its tip extends upward. A rope from a rear winch fixed to the outside of the rear part of the vehicle of the truck bed is engaged with the engaging portion of the rear multi-stage cylinder, and further engaged with the engaging portion of the front multi-stage cylinder, and connected to a front winch fixed to the outside of the front of the vehicle of the truck bed. Rope moving means is provided to wind and move the rope with the front winch or the rear winch. A pair of each is provided in the vehicle width direction, and both ends are detachably attached to the pair of ropes, and a belt-like member disposed in the vehicle width direction is provided. In the rear area of the truck bed, the leading end of the sheet is locked to the belt-like member, and the sheet is hung on the truck bed from the rear side of the vehicle by turning the front winch, or in the front area of the truck bed, the leading end of the sheet is locked to the belt-like member, and the sheet is hung on the truck bed from the front side of the vehicle by turning the rear winch. The sheet hanging device for a truck bed is characterized by this. A second aspect of the present invention is as follows. In the above first aspect, while the front multi-stage cylinder is fixedly attached to the front side portion of the vehicle of the torii, when the seat is to be hung, the rear multi-stage cylinder is fixedly attached from the rear side of the vehicle to the raised rear pufferfish after the rear multi-stage cylinder is raised. A third aspect of the present invention is as follows. In the above second aspect, a plurality of apertures spaced apart in the vertical direction are formed in the standing plate portion of the torii, and the rope engaged with the engaging portion of the rear multi-stage cylinder is passed from the engaging portion through one of the apertures instead of the engaging portion of the front multi-stage cylinder and connected to the front winch.

[0007] (Operation) Comprising a front multi-stage cylinder, a rear multi-stage cylinder, a rope moving means, and a belt-like member, when the leading end portion of the seat is locked to the belt-like member and the front winch or the rear winch is rotated so that the seat can be hung on the truck bed, it has a configuration that is easy to apply to existing trucks. And with a structure having few failures, the operator does not need to directly hold the seat to hang the seat. And when a rod provided with an engaging portion that engages with the rope is attached to the front multi-stage cylinder and the rear multi-stage cylinder so that the rod extends upward, it becomes possible to hang the seat higher than the load by the minimum necessary extension of the rod. Therefore, after locking the leading end portion of the seat to the belt-like member attached to the rope, extending the rod to lift the seat higher than the load and simply rotating the front winch or the rear winch can easily and safely hang the seat on the truck bed. Also, as in the second aspect, while the front multi-stage cylinder is fixedly attached to the front side portion of the vehicle of the torii, when the rear multi-stage cylinder is fixedly attached from the rear side of the vehicle to the raised rear pufferfish at the time of hanging the seat, the seat hanging device for this truck bed can be equipped on the truck without reducing the space of the bed. Furthermore, as in the third aspect, a plurality of apertures spaced vertically are formed in the upright plate portion of the torii, and the rope engaged with the engaging portion of the rear multi-stage cylinder is passed from the engaging portion through one of the apertures to the front winch instead of the engaging portion of the front multi-stage cylinder. This enables the sheet to be hung on the truck bed even with a load that is lower than the torii, so that it is possible to respond flexibly and smoothly to changes in the load capacity. The scope of application is expanded.

Advantages of the Invention

[0008] The sheet hanging device for the truck bed of the present invention has a structure with few failures, can be simply and safely sheet-hung, is also easy to install on existing trucks, and can smoothly respond to changes in the load capacity, etc., and has great effects.

Brief Description of the Drawings

[0009]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Figure 11

Figure 12

Figure 13

Embodiment for Carrying Out the Invention

[0010] Hereinafter, the sheet hanging device for a truck bed according to the present invention will be described in detail. Figs. 1 to 13 show one form of the sheet hanging device for a truck bed of the present invention (hereinafter, also simply referred to as "sheet hanging device"). Fig. 1 is a side view of the front part of the vehicle of the truck to which the sheet hanging device is attached, Fig. 2 is a front view of the front side part of the torii of Fig. 1, Fig. 3 is a side view of the rear part of the truck vehicle to which the sheet hanging device is attached, Fig. 4 is a partial cross-sectional view of Fig. 3 in (A), and (B) is a view taken in the direction of the arrow of the main part of the line IV-IV of (A). Fig. 5 is a side view of the rear part of the truck vehicle with the rear multi-stage cylinder housed therein, Fig. 6 is a side view in which the rear multi-stage cylinder is pulled out from Fig. 5, Fig. 7 is a plan view showing the location for housing the rear multi-stage cylinder in a truck without a bed, Fig. 8 is a rear view from the rear of the truck at the start of sheet hanging, Fig. 9 is a perspective view of pulling out the rope in preparation for sheet hanging in (A), and (B) is a perspective view in which a belt-like member is disposed on the rope of (A). Fig. 10 is a side view in which the drawing end of the sheet is attached to the belt-like member of Fig. 9(B), Fig. 11 is a side view in which the rod of the front and rear multi-stage cylinder of Fig. 10 is extended, Fig. 12 is a side view in which the front winch of Fig. 11 is wound to pull the sheet to near the torii, and Fig. 13 is an alternative view instead of Fig. 10 when the load is small. Each figure emphasizes the main part for easy understanding and omits the parts not directly related to the present invention. The sheave SH is not shown except in Figs. 3 and 4, and the illustration of the rail 57 is omitted in Fig. 5.

[0011] (1) Sheet Hanging Device for Truck Bed The device for covering the truck bed with a sheet is a device used for covering the sheet when loading goods onto the truck 1 of a flatbed vehicle as shown in FIGS. 1 to 13 and tightening the aolis 22, 23. The sheet covering device includes a pair of each of the front multi-stage cylinder 4, the rear multi-stage cylinder 5, the rope moving means RP, and the belt-like member 8 on both sides closer to the vehicle width direction of the truck (FIG. 8). Looking at only one of the pair, the front multi-stage cylinder 4, the rear multi-stage cylinder 5, and the front winch 6A and the rear winch 6B of the rope moving means RP are substantially arranged on one vertical plane in the vehicle longitudinal direction.

[0012] The front multi-stage cylinder 4 is a multi-stage cylinder arranged on the front side of the vehicle of the cargo bed 2, that is, on the front side of the vehicle inside the cargo bed 2 or on the front side of the vehicle outside the cargo bed 2 (FIG. 1). The multi-stage cylinder is also called a telescopic cylinder and is a cylinder equipped with a multi-stage tube-shaped piston rod. It can obtain a long operating stroke with a short mounting length. The front multi-stage cylinder 4 is mounted so that the rod 42 provided with the engaging portion 45 at the tip extends upward. Here, the "upward" related to "the rod 42 extends upward" in the present invention refers to above the vehicle, that is, above the paper surface in FIG. 1 where the truck 1 is placed on the ground surface.

[0013] The front multi-stage cylinder 4 of the present embodiment is preferably arranged on the front side of the vehicle outside the cargo bed 2 that does not reduce the loading space. Specifically, as shown in FIGS. 1 and 2, there is a space between the cab 1A and the torii. It is fixedly attached to the front side portion of the vehicle of the torii 3. The contact member 49 protruding from the cylinder 41 is applied to the standing piece 35 erected toward the front of the vehicle on the standing plate portion 31 (or the reinforcing rib 32) having the vertical plate surface of the torii 3. Using the holes provided on both sides, the cylinder 41 in the vertical direction is screwed and fixed to the torii 3 with bolts and nuts 491. With the extension of the rod 42, which is the piston rod related to the front multi-stage cylinder 4, the engaging portion 45 is set to a height exceeding the torii 3 as shown in FIG. 11. The above engaging portion 45 is a component in which a portion that engages with the rope 7 and smooths the winding of the rope 7 by the winch 6 is formed. In this embodiment, a sheave is used. The pulley 451 of the sheave that receives the rope 7 facilitates the winding by the winch 6. The reference numeral 452 is the holding frame of the sheave, and the rope 7 is passed through the through hole 450 between the top plate portion 4521 and the pulley 451. Instead of the illustrated sheave, the engaging portion 45 can also use a hook type of a ball hanging tool with a detent fitting or the like.

[0014] The rear multi-stage cylinder 5 is a multi-stage cylinder arranged on the rear side of the vehicle of the loading platform 2, that is, on the rear side of the vehicle inside the loading platform 2 or on the rear side of the vehicle outside the loading platform 2 (FIG. 3). Similar to the front multi-stage cylinder 4, the rear multi-stage cylinder 5 is attached such that the rod 52 provided with the engaging portion 55 at the tip extends upward, and the same sheave is also adopted for the engaging portion.

[0015] This embodiment is arranged on the rear side of the vehicle outside the loading platform 2, which is more preferable without reducing the load space. Specifically, only when the seat is covered, the rear multi-stage cylinder 5 is fixedly attached from the rear side of the vehicle to the rear aori 23 erected as shown in FIGS. 3 to 6. This is to prevent interference when the rear multi-stage cylinder 5 is not in use. When the rear multi-stage cylinder 5 is attached to the rear aori 23, due to the extension of the rod 52, the engaging portion 55 provided at the tip thereof is set to a height exceeding the torii 3 as shown in FIG. 11.

[0016] Here, when there is no sheet hanging operation, the rear multi-stage cylinder 5 is removed from the rear fin 23 and stored. Specifically, a guide portion 57 as shown in FIGS. 3 and 4 is fixed to the lower part of the rear multi-stage cylinder 5. A rail 58 is disposed on the ladder frame 25 on the back surface of the loading platform inside the side locker 251, and the guide portion 57 having a groove 570 fitted to the rail is made slidable rearward of the vehicle from the state shown in FIG. 5. The top portion 582 that horizontally projects the wart-like projection 571 of the guide portion 57 close to the rail upright portion 581 receives as shown in FIG. 4(b) to prevent the rear multi-stage cylinder 5 from falling. In addition, the upper part of the cylinder 51 on the side where the rod 52 protrudes and retracts is attached and fixed to the back surface side of the loading platform 2 in FIG. 5 with a retaining tool (not shown) of a U-shaped band (not shown). Thus, when the sheet of the load G is not hung, the rear multi-stage cylinder 5 in an engaged state is stored and held on the rail 58 provided on the back surface side of the loading platform 2 inside the side locker 251. In FIG. 5, the rail 58 is omitted because it would be complicated to draw. On the other hand, when hanging the sheet, the above-mentioned retaining tool is removed, and the rear multi-stage cylinder 5 in the state shown in FIG. 5 is pulled out rearward of the vehicle as shown in FIG. 6. Then, the rear multi-stage cylinder 5 is erected and attached and fixed to the rear side of the vehicle of the rear fin 23 (FIG. 3). Instead of using the guide rail 58 or the like, for example, a storage box may be provided in the back surface space of the loading platform 2 inside the side locker 251, and the rear multi-stage cylinder 5 may be stored therein.

[0017] On the other hand, when attaching and fixing the rear multi-stage cylinder 5 to the rear side of the vehicle of the rear fin 23, it is as follows. In FIG. 3, a contact member 59 corresponding to the contact member 49 of the front multi-stage cylinder 4 projects from the cylinder 51. Also, a plate piece (not shown) corresponding to the standing piece 35 stands upright rearward of the vehicle from the rear fin 23. Using the holes provided on both sides, the rear multi-stage cylinder 5 in which the rod 52 extends upward is vertically erected and screwed and fixed to the rear fin 23 (FIG. 3). Since the lower part of the cylinder 51 is locked by the wart-like projection 571 to the stopper 583 provided at the rear end of the rail 58 in the vehicle rearward direction (FIG. 4), the contact member 59 is integrated. The attachment and fixing of the rear multi-stage cylinder 5 to the rear fin 23 can also be a clamping metal fitting, a hanging tool, etc. that improve workability instead of the contact member 59. In the present embodiment, under the state of FIG. 3 in which the rear multi-stage cylinder 5 is attached and fixed to the vehicle rear side of the rear draft 23, a sheave SH that slopes downward toward the vehicle rear is provided on the guide portion 57. This is to smooth the winding movement of the rope 7 of the rope moving means RP.

[0018] The rope moving means RP includes a rope 7, a rear winch 6B, and a front winch 6A, and is a moving device for the rope 7 configured to wind and move the rope 7 with the front winch 6A or the rear winch 6B. The rear winch 6B is fixed to the outer side of the rear part of the loading platform 2 as shown in FIG. 3, and the front winch 6A is fixed to the outer side of the vehicle front of the loading platform 2 as shown in FIG. 1. The rope 7 from the rear winch 6B is engaged with the engaging portion 55 of the rear multi-stage cylinder 5, and further engaged with the engaging portion 45 of the front multi-stage cylinder 4, and then connected to the front winch 6A. When the rope 7 is wound by the front winch 6A or the rear winch 6B, the rope 7 moves.

[0019] Here, as shown in FIGS. 3 and 7, the rear winch 6B is fixed to the ladder frame 25 on the back side of the loading platform near the rear tire 131 inside the vehicle of the side locker 251. The rail 58 is arranged on the vehicle rear side of this rear winch 6B. Further, as shown in FIGS. 1 and 2, the front winch 6A is fixed to the vehicle front side vertical plate portion 31 of the torii 3 at the vehicle front side portion of the torii 3 and directly below the front multi-stage cylinder 4. Reference numeral 61 indicates a motor for turning the front winch 6A, and reference numeral 69 indicates a mounting plate piece that holds the winch 6 with a motor and is fixed to the vertical plate portion 31. The rear winch 6B also uses the same electric winch 6 as the front winch 6A, but the front and rear winches 6A and 6B may be manual winches.

[0020] As shown in FIG. 3, the rope 7 reaches the sheave SH provided on the rear multi-stage cylinder 5 at the rear of the vehicle, running substantially parallel to the back surface of the loading platform 2 from the rear winch 6B. It then bends and heads upward of the vehicle, engaging with the engaging portion 55 of the rear multi-stage cylinder 5 as shown in FIG. 9. The rope 7 passing through the through-hole 550 of the engaging portion 55 then passes through the through-hole 450 of the engaging portion 45 of the front multi-stage cylinder 4 on the front side of the vehicle, and then becomes a rope or wire connected to the front winch 6A as shown in FIG. 10. By winding the rope 7 with the front winch 6A or the rear winch 6B, the rope 7 moves forward or backward of the vehicle. Regarding the rope 7, it is not necessary to be a continuous single piece on both sides in the vehicle width direction. For example, as shown in FIG. 9, the rope 7 can be divided, and even if the belt-like member 8 is interposed in the middle of the rope 7, as long as the rope 7 engages with the engaging portion 55 of the rear multi-stage cylinder 5 from the rear winch 6B and further engages with the engaging portion 45 of the front multi-stage cylinder 4 and is connected to the front winch 6A, it is regarded as the rope 7 of the present invention. Here, the rope 7 is divided into two on both sides in the vehicle width direction, and hook portions 79 are attached to each divided part.

[0021] The belt-like member 8 is a connecting member arranged in the vehicle width direction by detachably attaching both ends to a pair of ropes 7 arranged near both sides in the vehicle width direction (FIGS. 8 and 9). It is a member for connecting the rope 7 and the seat hanging seat 9, and enables the seat 9 and the belt-like member 8 to follow the movement of the rope 7 so that the seat can be hung on the truck loading platform 2. As long as the belt-like member 8 can perform this function, the belt shape of the belt-like member 8 in the present invention includes rod-shaped and angular ones. A ring-shaped engaged member 81 for locking a plurality of hooks 91 provided at the leading end portion 9a of the seat 9 is provided along one side edge in the belt direction corresponding to the hooks 91 on the belt-like member 8.

[0022] The belt-shaped member 8 of this embodiment forms through holes 89 at four locations on each of the four sides at both ends (b in FIG. 9). Each hook portion 79 of the ropes 7 from the front multi-stage cylinder 4 and the ropes 7 from the rear multi-stage cylinder 5 is hooked on the through holes 89 of the belt-shaped member 8, and the belt-shaped member 8 is detachably attached to the pair of ropes 7. And a pair of ropes 7 are configured to be connected from the rear winch 6B to the front winch 6A with the belt-shaped member 8 interposed therebetween. Incidentally, the engaging portion 45 of the actual front multi-stage cylinder 4 is integrally formed with the rod 42 by tilting slightly forward toward the front of the vehicle, and the engaging portion 55 of the rear multi-stage cylinder 5 is integrally formed with the rod 52 by tilting slightly backward toward the rear of the vehicle. This is to avoid rubbing with the cylinders 41 and 51 during rope movement (FIGS. 10 to 12).

[0023] Thus, with the front multi-stage cylinder 4, the rear multi-stage cylinder 5, the rope moving means RP, and the belt-shaped member 8, at the rear region of the loading platform 2 in a state where the rear multi-stage cylinder 5 is attached and fixed from the rear side of the vehicle to the raised rear aoli 23, the leading end portion 9a of the seat 9 is locked to the belt-shaped member 8 attached to the rope 7, and by turning the front winch 6A, it becomes a desired seat hanging device for hanging the seat 9 from the rear side of the vehicle to the truck loading platform 2 (FIGS. 8 to 12).

[0024] Also, at the front region of the loading platform 2, the leading end portion 9a of the seat 9 is locked to the belt-shaped member 8 attached to the rope 7, and by turning the rear winch 6B, it also becomes a seat hanging device for hanging the seat 9 from the front side of the vehicle to the truck loading platform 2. Furthermore, in this embodiment, a plurality of apertures 310 are formed in the torii upright plate portion 31 so as to be vertically spaced apart. Here, as shown in FIG. 2, two apertures 310 are respectively provided at the portion of the upright plate portion 31 above the pair of front winches 6A. The rope 7 engaged with the engaging portion 55 of the rear multi-stage cylinder 5 can be passed through one of the apertures 310 from the engaging portion 55 and connected to the front winch 6A instead of the engaging portion 45 of the front multi-stage cylinder 4. It becomes a seat hanging device that can also face the load G lower than the torii 3. Here, the front multi-stage cylinder 4 and the rear multi-stage cylinder 5 located near both sides in the vehicle width direction, the front winch 6A and the rear winch 6B of the rope moving means RP, and in addition, the two apertures 31, 310 in the vertical direction are arranged such that when they are tightened to one side near one side, they are disposed on one vertical plane in the vehicle front-rear direction (FIG. 8). Further, a sheave 39 having the same shape as the engaging portion 45 is attached to the vehicle front side portion of the vertical plate portion 31 below each aperture 310 (enlarged view of FIG. 1), and the pulley 391 reduces the winding resistance when the rope 7 is wound. In the figure, reference numeral 12 denotes a frame, 17 denotes a rear bumper, 21 denotes a floor board, 25 denotes a side stay, 29 denotes a hinge, 32 denotes a reinforcing rib, 33 denotes a center rope can, and SH1 denotes a pulley.

[0025] (2) Seat hanging method using a seat hanging device Next, a method of hanging a seat on the truck bed 2 using the above-described seat hanging device will be described. Prior to hanging the seat, first, load the truck bed 2 with goods, tie the load, and tighten the stays 22, 23. Then, remove the restraint and pull out the rear multi-stage cylinder 5 stored and held under the bed 2 of FIG. 5 to the rear of the vehicle (FIG. 6). The rear multi-stage cylinder 5 is erected and attached and fixed to the rear side of the vehicle of the rear stay 23 (FIGS. 3 and 4). Next, as shown in FIG. 9(a), the tip of the rope 7 drawn from the rear winch 6B is passed through the through hole 550 of the engaging portion 55 of the rear multi-stage cylinder 5, and the tip of the rope 7 drawn from the front winch 6A is passed through the through hole 450 of the engaging portion 45 of the front multi-stage cylinder 4 and extended near the rear stay 23. Then, as shown in FIG. 9(b), the hook portion 79 of the rope 7 is hooked on the through hole 89 of the belt-like member 8 so that the rope 7 is connected from the rear winch 6B to the front winch 6A. FIG. 8 shows a rear view of the state of FIG. 9(b) as seen from the rear of the truck, but the illustration of the cargo G is omitted so that the arrangement locations of the front multi-stage cylinder 4 and the aperture 310 can be understood.

[0026] Subsequently, attach the sheet 9 to the belt-like member 8. At the rear region of the loading platform 2, lock the leading end portion 9a of the sheet 9 to the belt-like member 8. Hook and lock the hook 91 of the sheet 9 to the ring 81 which is the locked member of the belt-like member 8 (b in Fig. 9, Fig. 10). After that, extend the rods 42 and 52 of both the front multi-stage cylinder 4 and the rear multi-stage cylinder 5, and raise the engaging portions 45 and 55 to a position higher than the cargo G. As shown in Fig. 11, the engaging portions 45 and 55 are at a position higher than the torii 3. After that, turn the front winch 6A to hang the sheet 9 from the rear side of the vehicle onto the truck loading platform 2. Wind up the rope 7 with the front winch 6A, and move the belt-like member 8 and the sheet 9 together with the rope 7 in the direction of the arrow in front of the vehicle in Fig. 11. Then, when the belt-like member 8 reaches near the torii 3, the following sheet 9 covers the cargo G as shown in Fig. 12. After that, even for the cargo G stacked higher than the torii 3, if the sheet 9 is removed from the belt-like member 8, the sheet hanging operation can be smoothly completed. It is not necessary for the operator to lift the heavy sheet 9 to a high position and further walk on the cargo G to hang the sheet. By using this sheet hanging device, the conventional heavy labor and dangerous work are avoided, and the sheet hanging on the flatbed vehicle is completed.

[0027] Here, there is also a case shown in Fig. 13 where the cargo G does not reach the height of the torii 3. In such a case, instead of passing the tip of the rope 7 pulled out from the front winch 6A through the through hole 450 of the engaging portion 45 of the front multi-stage cylinder 4 and extending it near the rear crawler 23 as shown in Fig. 9, the tip of the rope 7 pulled out from the front winch 6A is passed through an opening 310 provided in the torii 3 as shown in Figs. 1 and 13 and extended near the rear crawler 23. The rope 7 pulled out from the rear winch 6B is extended near the rear crawler 23 through the through hole 550 of the engaging portion 55 of the rear multi-stage cylinder 5 in the same manner as described above. Then, hook the hooked portions 79 of both ropes 7 to the through holes 89 of the belt-like member 8. Also, attach the leading end portion 9a of the sheet 9 to the belt-like member 8. After that, without operating the rod 42 of the front multi-stage cylinder 4, only the rod 52 of the rear multi-stage cylinder 5 is extended, and the engaging portion 55 is raised to a position higher than the load G as shown in FIG. 13. Since the load G is lower than the torii 3, it is sufficient to raise only the engaging portion 55 of the rear multi-stage cylinder 5 slightly higher than the top G1 of the load. FIG. 13 shows a working condition diagram corresponding to FIG. 11. After that, in the same manner as described above, the front winch 6A is rotated to hang the seat 9 from the rear side of the vehicle onto the truck bed 2, and the desired seat hanging operation can be completed.

[0028] Incidentally, in the above-described seat hanging method, the seat drawing end portion 9a is attached to the belt-like member 8 disposed near the rear aori 23, and the seat 9 is extended from the rear of the vehicle to the front of the bed 2. Instead, it is of course possible to adopt a method of extending the seat 9 from the cab 1A and the torii 3 on the front side of the bed to the rear portion of the bed 2. In such a case, instead of FIG. 10, the drawing end portion 9a of the seat 9 is locked to the belt-like member 8 disposed in the front region of the bed 2, and the rear winch 6B is rotated to hang the seat 9 from the front side of the vehicle onto the truck bed 2. In addition, although the present embodiment has been described with respect to the truck 1 as shown in the drawings, it can also be adopted for a trailer. It can also be applied to a torii 3 and a truck 1 (also referred to as a trailer) with a rear aori 23 in which parts can be divided into a tractor (cab 1A) and a trailer.

[0029] (3) Effect The seat hanging device for a truck bed configured as described above includes a pair of front multi-stage cylinders 4, rear multi-stage cylinders 5, and rope moving means RP in the vehicle width direction, and includes a belt-like member 8. When the drawing end portion 9a of the seat 9 is locked to the belt-like member 8 attached to both ropes 7, the seat 9 follows the movement of the rope 7. Therefore, the operator can move the seat 9 without holding it by hand by rotating the front winch 6A or the rear winch 6B. When the rods 42 and 52 of the front multi-stage cylinder 4 and the rear multi-stage cylinder 5 are extended upward, the engaging portions 45 and 55 can be easily positioned higher than the top of the load G1, making it easier to mount the seat on the truck bed 2. Its structure is simple and has few failures, enabling easy and safe seat mounting. It liberates the operator from the burden of lifting the heavy seat 9 to a high position and further walking on the load G to mount the seat. If the belt-like member 8 is selectively arranged in the rear region or the front region of the bed 2 and attached to the rope 7, the seat can be mounted from either the rear region or the front region of the bed 2.

[0030] Patent Document 1 requires an L-shaped seat holding arm, and the height of the seat holding arm for mounting the seat above the load is uniquely determined. Even if the load G has a small capacity, the seat mounting height has to be unnecessarily high and cannot be adjusted according to the size of the load capacity. In contrast, in this seat mounting device, the extension of the rods 42 and 52 related to the front multi-stage cylinder 4 and the rear multi-stage cylinder 5 can be easily adjusted correspondingly slightly higher than its height according to the size of the load G. It does not result in a situation of mounting the seat at a needlessly high position like a seat holding arm, and the seat can be mounted efficiently according to the size of the load capacity of the load G.

[0031] Furthermore, in the present invention, even when the front multi-stage cylinder 4 is arranged on the front side of the vehicle inside the bed 2, the above-mentioned seat mounting burden on the operator is significantly reduced. However, if the front multi-stage cylinder 4 is arranged on the front side of the vehicle outside the bed 2 as in this embodiment, there is an additional advantage that the floor space of the load G can be reduced without sacrificing it. Similarly, even when the rear multi-stage cylinder 5 is arranged on the rear side of the vehicle inside the bed 2, the seat mounting burden on the operator is significantly reduced. In addition, if the rear multi-stage cylinder 5 is attached and fixed to the rear aoli 23 tightened and erected from the rear side of the vehicle, the floor space of the load G can be reduced without sacrificing it, which is even more preferable. Moreover, since the front multi-stage cylinder 4 and the front winch 6A are attached to the vehicle front side of the torii vertical plate portion 31, they do not interfere with the loading and unloading of the cargo on the truck 1. The rear multi-stage cylinder 5 is only attached and fixed to the raised rear fin 23 only when the seat is being hung, so it does not interfere during cargo loading or the like. The removed rear multi-stage cylinder 5 can be easily stored inside, for example, the side locker 251, where there is space on the back surface of the loading platform behind the rear tire 131.

[0032] Also, unlike the unstable configuration in Patent Document 1 where a holding arm with a heavy seat 9 is cantilevered and supported by a wheel, the components for hanging the seat in this invention consist of the front multi-stage cylinder 4, the rear multi-stage cylinder 5, the rope moving means RP, and the belt-like member 8. Therefore, there are fewer malfunctions, and even with a heavy seat 9, a stable and smooth seat hanging operation can be performed. Furthermore, Patent Document 1 requires the upper side of the truck side where the wheels can run, and there is a possibility of being forced to change to a specially ordered member for the truck side where the wheels can run. However, since this seat hanging device does not rely on the truck side surface or the like, no specially ordered member is required. Moreover, this seat hanging device is easy to retrofit due to its configuration, and can be easily installed not only on new trucks but also on existing trucks 1.

[0033] In addition, as shown in FIGS. 1 and 2, when a plurality of apertures 310 spaced apart in the vertical direction are formed in the vertical plate portion 31 of the torii 3, the rope 7 engaged with the engaging portion 55 of the rear multi-stage cylinder 5 can be passed through one of the apertures 310 from the engaging portion 55 and replaced with the engaging portion 45 of the front multi-stage cylinder 4. Therefore, even in the case of a load G lower than the height of the torii 3, the seat can be smoothly hung. This is an excellent invention that expands the applicable range of the load G for which the seat can be hung. In this way, the seat hanging device for this truck loading platform exhibits the numerous excellent effects described above and is extremely beneficial.

[0034] Furthermore, in the present invention, it is not limited to that shown in the above embodiment, and various modifications can be made within the scope of the present invention according to the purpose and application. The shapes, sizes, numbers, materials, etc. of the truck 1, the loading platform 2, the torii gate 3, the front multi-stage cylinder 4, the rear multi-stage cylinder 5, the rope moving means RP, the belt-like member 8, the seat 9, etc. can be appropriately selected according to the application.

Explanation of Reference Numerals

[0035] 1 Truck 2 Loading Platform 23 Rear Aori 3 Torii Gate 31 Upright Plate Portion 310 Opening 4 Front Multi-stage Cylinder 42 Rod 45 Engagement Portion 5 Rear Multi-stage Cylinder 52 Rod 55 Engagement Portion 6A Front Winch 6B Rear Winch 7 Rope 8 Belt-like Member 9 Seat 9a Pull-out End Portion RP Rope Moving Means

Claims

1. A front multi-stage cylinder mounted on the vehicle front side of the loading platform such that a rod provided with an engaging portion at its tip extends upward, and a rear multi-stage cylinder mounted on the vehicle rear side of the loading platform such that a rod provided with an engaging portion at its tip extends upward, and rope moving means which engages a rope from a rear winch fixed to the outer side of the rear part of the loading platform with the engaging portion of the rear multi-stage cylinder, further engages it with the engaging portion of the front multi-stage cylinder, and connects it to a front winch fixed to the outer side of the vehicle front of the loading platform, and winds and moves the rope with the front winch or the rear winch, with a pair of such means provided in the vehicle width direction respectively, and a belt-like member disposed in the vehicle width direction, having both ends detachably attached to the pair of ropes respectively, a seat hanging device for a truck loading platform, characterized in that at the rear region of the loading platform, a leading end portion of a seat is locked to the belt-like member, and the seat is hung from the vehicle rear side to the truck loading platform by turning the front winch, or at the front region of the loading platform, the leading end portion of the seat is locked to the belt-like member, and the seat is hung from the vehicle front side to the truck loading platform by turning the rear winch.

2. The seat hanging device for a truck loading platform according to Claim 1, wherein the front multi-stage cylinder is attached and fixed to the front side portion of the vehicle of the torii, while the rear multi-stage cylinder is attached and fixed to the raised rear pythons from the vehicle rear side at the time of hanging the seat.

3. The seat hanging device for a truck loading platform according to Claim 2, wherein a plurality of apertures spaced apart in the vertical direction are formed in the upright plate portion of the torii, and the rope engaged with the engaging portion of the rear multi-stage cylinder is passed through one of the apertures instead of the engaging portion of the front multi-stage cylinder from the engaging portion and connected to the front winch.

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