JPH0347929Y2 - - Google Patents

Description

[Detailed Description of the Invention] <Industrial Application Field> This invention relates to a sheet device in a dump truck, which is used to cover the top of a cargo box of a dump truck or the like with a sheet.

<Prior art> Conventionally, a sheeting device for covering a packing box storing coal, etc. with a sheet has been designed to guide a side vertical member to which the leading end of the sheet is attached from one side of the packing box to the other side, and then There is one in which the sheet is placed on a receiving member with a trapezoidal cross section located at the top of the box, and the sheet is placed over the cargo box.

<Problems to be Solved by the Invention> However, in the above-mentioned conventional seat device, as shown in FIG. 8, since the receiving member 6 is made of wood and has a trapezoidal cross section, In between, the contact becomes surface contact, and the coal 7 may be sandwiched between them. For this reason, there was a problem that a gap was formed between the side vertical member 2 and the receiving member 6, and the coal inside leaked to the outside through this gap.

Therefore, an object of this invention is to provide a seat device for a dump truck that can almost completely seal the space between the side vertical member and the receiving member from the outside.

<Means for Solving the Problems> In order to achieve the above object, the seat device for a dump truck of this invention has a structure in which the upper end of the receiving member 20 extends linearly in the front-rear direction, as illustrated in FIGS. 1 and 2. The structure is characterized in that the contact between the receiving member 20 and the side vertical member 21 is a line contact.

<Operation> The side vertical member 21 to which the end of the sheet 13 is attached is placed on the receiving member 20 on the other side of the packing box 11 from one side of the packing box 11, passing through the top of the packing box. and,
Sheet 13 is stretched. Here, since the receiving member 20 has a shape that projects upward and has an upper end linearly extending in the front-rear direction, coal does not accumulate on the upper end of the receiving member 20, and the receiving member 20 and the side vertical members 20
Since the contact between the receiving member 20 and the side vertical member 21 is a line contact, foreign matter will not be caught between the receiving member 20 and the side vertical member 21, and an almost perfect seal against the outside can be obtained. Therefore, the loaded items in the cargo box 11 will not leak to the outside.

<Example> This invention will be explained in detail below with reference to the illustrated example.

In Fig. 2, 11 is the loading platform 12 of the dump truck.
14 is a sheet device that stretches a sheet 13 to cover the top of the cargo box 11.

As shown in FIG. 1, a receiving member 20 with a triangular cross section extending in the front-rear direction is fixed to the upper surface of the sliding door 10 on the right side of the cargo box 11. On the other hand, the second and third
As shown in the figure, the seat device 14 is composed of a link mechanism 141 and a drive section 142. This link mechanism 141 includes a rod-shaped torque shaft 15 extending in the front-rear direction of the loading platform 12, a seat frame 16 disposed parallel to the torque shaft 15, main links 17, 17, and guide links 18, 1.
It consists of 8. The seat frame 16 is the loading platform 12
angular central vertical members 19 mutually extending in the front-rear direction;
Bent rod-shaped horizontal members 22, 22, . . . are fixed in a ladder-like manner between the horizontal member 21 and the side vertical member 21 having a substantially U-shaped cross section as shown in FIG. The main link 17 has its base end fixed to the torque shaft 15, and its distal end rotatably attached to the central vertical member 19 of the seat frame 16 by a pin 80. The guide link 18 has its base end rotatably attached to the bracket 28 on the ceiling surface 11a of the cargo box 11 with a pin 29, while its tip end is attached to the seat frame 1.
It is rotatably attached to the side vertical member 21 of 6 with a pin 23.

Then, the bottom surface 211 of the side vertical member 21 is placed on the tip 201 of the receiving member 20, and the contact between them is a line contact. Furthermore, a rubber packing 30 is interposed between the outer inclined surface 202 of the receiving member 20 and the bottom surface 211 of the side vertical member 21. This was done in order to prevent coal from spilling out beyond the receiving member 20 even if the coal in the packing box 11 leaks to the outside of the receiving member 20 due to the sealing effect of the packing 30.

As shown in FIGS. 3, 4, and 5, the torque shaft 15 is supported by a center bearing 27 approximately in the center thereof, and is divided into two members 151 and 152. In this way, the rigidity of the torque shaft 15 is increased and the torque shaft 15 is prevented from being bent. One member 151 of the torque shaft 15
passes through the front head 23 via a bush 70. One of the gears 31 of the drive section 142 is fitted into the tapered tip end of the nut 50.
It is fixed to member 151 with. The drive section 142
is two gears 31, 32 and this gear 31, 3
2, a chain 33 wound around the cylinder 34, and a cylinder 34 having the tip of a piston rod 341 fixed to the chain 33.
and a hydraulic power unit 35 that supplies pressure oil to the cylinder 34. These two gears 3
1 and 32, the chain 33, and the cylinder 34 are housed in a box-shaped casing 36. One end of the generally doglegged main link 17 is attached to one end of the main link 17 via bushes 70, 70, and the chevron-shaped portion thereof is connected to one member 151 of the torque shaft 15 between the penetration portion of the front head 23 and the gear 31. It is fixed with the side facing down. Further, the tip of the other member 152 of the torque shaft 15 passes through the plate-shaped rear head 24 via bushes 70, 70, and one end of the main link 17 having the same shape as described above is fixed. .

On the other hand, as shown in FIG. 6, on the upper surface of the sliding door 37 on the left side of the cargo box 11, a shielding plate 38 whose tip is bent toward the inside of the cargo box 11 is provided. This shield plate 38 serves to prevent the coal in the cargo box 11 from leaking to the outside, and also to protect the front head 23 and the rear head 2.
It also has the role of supporting 4.

At the lower side of the side vertical member 21, as shown in FIGS. 1 and 2, a fixing member 42 consisting of a bolt 421 and a nut 422 for fixing one end of the sheet 13 with a rope 41 is provided. A fixing member 43 on which the other end of the sheet 13 is hung is provided in the section, each end of the rope 41 is hung on both fixing members 42 and 43, and the sheet 13 is moved from the left side of the packing box 11 to the top of the packing box 11. It covers the right side of the packing box 11. Note that 51, 51 are known lashing devices for lashing the cargo box 11.

Assume that coal is loaded into the cargo box 11 in the above configuration. As shown in FIG.
Two hydraulic power units 35 supply pressurized oil to the cylinders 34. As the cylinder 34 operates and the piston rod 341 contracts, the chain 33 moves and the gear 3 rotates. This rotation of the gear 3 causes the torque shaft 15 to rotate. As shown in FIG. 2, the guide link 18 rotates around the pin 29 in the direction of the arrow, while the guide link 17 rotates around the torque shaft 15, so that the seat frame 16 and the seat 13 rotate together. It is guided by the main link 17 and the guide link 18 and is moved from the left side to the right side of the cargo box 11. The side vertical members 21 of the seat frame 16 are placed on the tip of the receiving member 20, and the seat 13 is covered. At this time, since the upper end of the receiving member 20 has a shape extending linearly in the front-rear direction, coal does not accumulate on the receiving member 20, and contact between the side vertical member 21 and the receiving member 20 is prevented. is in line contact, so
Coal is not caught between the side vertical member 21 and the receiving member 20, and there is no gap between them, so that the sealing from the outside is almost completely achieved. Furthermore, the packing 30 of the side vertical member 21 further increases the sealing effect against the outside. Conversely, sheet 13
When folding into the left side of the cargo box 11, the piston rod 341 is moved by the hydraulic power unit 35.
is extended, the gear 31 rotates via the chain 33, the torque shaft 15 rotates, and the seat frame 16 moves from the right side of the cargo box 11 over the top of the cargo box 11 to the left side of the cargo box 11. and folded as shown in FIG.

In this way, by the operation of the cylinder 34 of the hydraulic power unit 35, the seat frame 16 is moved from the right side to the left side of the cargo box 11, and the seat 1
3 is folded and stored in the left side of the cargo box 11, so the seat 13 can be made compact. Furthermore, as shown in FIGS. 6 and 7, since the shielding plate 38 prevents coal from leaking to the outside, coal will not leak and accumulate in part A of the folded sheet 13 when loading coal. . Therefore, the folded sheet 13 can be easily and quickly stretched over the cargo box 11.

<Effects of the invention> As is clear from the above explanation, according to the seat device for a dump truck of this invention, the upper end of the receiving member is shaped to extend linearly in the front-rear direction, and the contact between the receiving member and the side vertical member is prevented. Since it is in line contact, it is possible to prevent foreign matter from accumulating on the receiving member. Therefore, the seal between the receiving member and the side vertical member can be almost completely formed, and the cargo inside the cargo box can be prevented from leaking to the outside.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view of a main part showing an embodiment of this invention, FIG. 2 is a diagram showing a packing box to which the above embodiment is applied, and FIG. 3 is a diagram showing a link mechanism of the above embodiment.
FIG. 4 is a diagram showing the torque shaft of the above embodiment;
Fig. 5 is a diagram showing the link mechanism and the drive section, Fig. 6 is a sectional view showing the operating state of the above embodiment, Fig. 7 is an overall view showing the seat in a folded state, and Fig. 8 is a diagram of the conventional example. FIG. 3 is a cross-sectional view showing main parts. 10... Swing door, 11... Packing box, 13... Sheet, 20... Receiving member, 21... Side vertical member.

Claims (1)

[Claim for Utility Model Registration] The side vertical member to which the leading end of the sheet is attached is guided from one side of the packing box to the other side, and the sheet is loaded by placing it on the receiving member located on the other side. In a seat device for a dump truck that is placed over a box, the upper end of the receiving member is shaped to extend linearly in the front-rear direction, and the contact between the receiving member and the side vertical member is a linear contact. Features: Seat device for dump trucks.