JPH0535925Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) The present invention is a cargo box tilting device for a vehicle equipped with a cargo box that tilts the cargo box with the rear part of the cargo box lifted to a predetermined height from the vehicle body frame. Regarding.

(Prior art) Conventionally, in this type of cargo box tilting device, as seen in Japanese Utility Model Publication No. 52-56567, a telescoping cylinder is disposed in the front and back direction between the cargo box and the vehicle body frame, and this telescoping cylinder is The front end of the cylinder is pivoted to the front bottom of the cargo box, one end of a connecting rod is pivoted to the rear end of the telescoping cylinder, and the other end of the link is pivoted to the rear bottom of the cargo box. One end of the connecting rod is configured to be movable to the rear of the cargo box by extension of the telescopic cylinder, and further, one end of the connecting rod is pivoted to a bracket projecting from the rear upper surface of the vehicle body frame in the middle of the connecting rod. The other end of the supported arm body is pivotally supported, and the link mechanism consisting of the connecting rod and arm rod is first activated by the extension of the telescopic cylinder to lift the rear part of the cargo box to a predetermined height. The cargo box is tilted backwards while maintaining its position.

(Problem to be solved by the invention) However, in the above-mentioned conventional device, at the initial stage of tilting, as the rear part of the cargo box is lifted, the front surface of the cargo box tilts toward the driver's seat, which is located in front of the cargo box. Therefore, in order to prevent interference between the front of the cargo box and the driver's seat, a large gap must be maintained between the two, which limits the length of the cargo box and reduces the loading capacity.

In addition, since one end of the arm rod of the link mechanism is pivotally supported by a bracket protruding from the upper rear surface of the vehicle body frame, in order to avoid interference between this protruding bracket and the rear bottom of the cargo box, A relief part had to be provided at the rear of the bottom of the box, which caused the problem that the volume of the cargo box was reduced by the relief part.

(Means for solving the problem) The cargo box tilting device for a vehicle equipped with a cargo box of the present invention has the following features:
A cargo box mounted on the vehicle body frame, a telescoping cylinder whose front end is connected to the front bottom of the cargo box, one end of which is pivoted to the rear end of the telescoping cylinder, and the other end of which is connected to the rear of the bottom of the cargo box. The vehicle is comprised of a connecting rod which is pivoted on the cylinder and whose one end can be moved to the rear of the cargo box by extension of the telescopic cylinder, and an arm disposed between the middle part of the connecting rod and the rear of the vehicle body frame. In a cargo box tilting device comprising a link mechanism and a stopper that prevents rearward movement of one end of the connecting rod due to extension of the telescoping cylinder, a hook member is provided at the rear end of the telescoping cylinder, and a hook member is provided at the rear end of the telescoping cylinder. An engaging member that can be engaged with and detached from the hook member is provided at the rear part of the frame;
One end of the arm of the link mechanism is attached below the top surface of the vehicle body frame, and further, a bracket having a long hole formed in the front-rear direction of the cargo box is provided at the front bottom of the cargo box, and The front end of the telescoping cylinder is provided with a pin that is slidably fitted into the elongated hole, and the front end of the telescoping cylinder is slidably connected to the front bottom of the cargo box by the length of the elongated hole. It is something.

(Function) The other end of the arm is pivoted below the vehicle body frame, the link mechanism is compactly arranged between the vehicle body frame and the cargo box, and the rod end of the telescopic cylinder is placed at the front of the bottom of the cargo box. By connecting the cargo box so that it can slide in the front and rear directions, the rear part of the cargo box is lifted while moving rearward during the initial stage of the cargo box's tilting, which allows the front of the cargo box to be connected to the driver's seat when it is stored. Even if the distance between the two is narrowed, interference between the two can be avoided.

(Example) Hereinafter, an example of the present invention will be described with reference to the drawings.

In this example, a cargo box tilting device for a vehicle equipped with a cargo box according to the present invention will be explained by taking a garbage collection vehicle as an example.

1 and 4 show a cargo box tilting device for a garbage collection vehicle.

In the figure, 10 is a vehicle body frame, and a cargo box 20 is mounted on this vehicle body frame 10. Packing box 20
A swing door (not shown) is rotatably provided at the rear of the vehicle. A telescopic cylinder 30 for tilting the cargo box 20 is arranged in the front-rear direction between the vehicle body frame 10 and the cargo box 20. A pin 32 is provided at the front end (rod end) 31 of this telescopic cylinder 30 in the width direction, and this pin 32 slides in the longitudinal direction into the elongated hole 22 of the bracket 21 fixed to the front bottom of the cargo box 20. It is inserted so that it can move freely. Telescopic cylinder 30
The front end 31 is slidably connected to the front bottom of the cargo box 20 by the length of the elongated hole 22. At both ends of the pin 32, there are rollers 33 that come into sliding contact with the bottom surface of the packing box 20.
33 are provided, and these rollers 33, 33
By slidingly contacting the bottom of the packing box 20, the pin 3
2 can smoothly slide through the elongated hole 22 of the bracket 21. Note that such a slide mechanism is not limited to this example. Further, a holding member 11 that holds a pin 32 is fixed to the vehicle body frame 10, and the front end 31 of the telescoping cylinder 30 is held at this position at the initial stage of expansion of the telescoping cylinder 30.

As shown in FIG. 4, the rear end 35 of the telescoping cylinder 30 is connected to link mechanisms 50, 50, which are arranged symmetrically with respect to the telescoping cylinder 30 via a connecting member 51, respectively. 52 is a bracket fixed to the connecting member 51, and the rear end 35 of the telescopic cylinder 30 is attached to this bracket 52.
is rotatably supported by the pin 36, and the pin 3
Rollers 37, 37 are rotatably provided at both ends of 6.

Hereinafter, one link mechanism 50 will be explained.

The link mechanism 50 lifts the rear part of the cargo box 20 to a predetermined height as the telescoping cylinder 30 expands at the initial stage of expansion, and one end thereof is connected to one end of the connecting member 51. , a connecting rod 53 whose other end is rotatably supported by a bracket 23 fixed to the bottom rear part of the cargo box 20.
and an arm body 56 whose other end is rotatably supported by a bracket 12 fixed to the rear of the vehicle body frame 10, and whose one end is rotatably supported by a midway portion of the connecting rod 53. has been done. Here, arm body 5
The pivot position of the other end of 6 is below the upper surface of the vehicle body frame 10, and when the cargo box 20 is stored, the folded link mechanism 50 is positioned between the vehicle body frame 10 and the cargo box 20. It is designed so that it can be placed compactly.

Further, a rolling roller 54 is rotatably supported at one end of the connecting rod 53 by a pivot pin 55.
This rolling roller 54 and the rollers 37, 37
moves in the front-rear direction on a guide plate 13 provided on the vehicle body frame 10.

Further, two hook-shaped hook members 38, 38 are fixedly fixed in parallel to the rear end 35 of the telescopic cylinder 30 with their tips facing downward. Body frame 10
A rolling roller 54 or rollers 37, 37, which are moved by the expansion of the telescopic cylinder 30, is provided at the rear of the cylinder.
A stopper 15 is fixed in the lateral direction to stop the movement of the link mechanism 50 by abutting against the link mechanism 50, and an engagement hole (an engagement hole) is provided at the position of the stopper 15 corresponding to the hook members 38, 38. Parts) 16
are provided so that the hook members 38, 38 are engaged with the engagement holes 16 in conjunction with the tilting movement of the cargo box 20. Note that the number of hook members 38, the shape of the engagement hole 16, etc. are not limited to this example.

Next, the operation of the garbage collection vehicle configured as above will be explained.

As shown in Fig. 1, the packing box 20 is laid down (stored).
When the telescopic cylinder 30 is extended in this position, the rollers 37 , 37 and the rolling roller 54 move backward on the guide plate 13 and collide with the stopper 15 . Along with this, link mechanism 5
0 is activated, that is, the connecting rod 53 stands up and the cargo box 2
Lift the rear part of 0.

When lifting the rear of the cargo box 20, the cargo box 20
The pin 32 provided at the front end 31 of the telescopic cylinder 30 is held by the holding member 11 and the bracket 2
1 by sliding through the elongated hole 22 (see Fig. 2).

Furthermore, when the telescoping cylinder 30 is extended, the pin 32 separates from the holding member 11 and the front end 31 of the telescoping cylinder 30 is lifted.
0 is lifted and the cargo box 20 is tilted as shown in FIG. At this time, when the telescopic cylinder 30 is tilted, the rear end 3 of the telescopic cylinder 30 is
The hook members 38, 38 fixedly attached to the engagement hole 1
6 to hold the rear end 35 of the telescopic cylinder 30 in this position. As a result, the link mechanism 50 is held in a state in which the rear part of the cargo box 20 is lifted, and the cargo box 20 is tilted to the final position with the rear part lifted (see FIG. 3). Thereby, the garbage in the cargo box 20 can be discharged from the rear of the cargo box 20.

Moreover, when the packing box 20 is to be laid down, the operation is performed in the opposite manner to the above.

(Effects of the invention) As described above, according to the invention, at the initial stage of the cargo box tilting, the front end of the telescoping cylinder is positioned in front of the bottom of the cargo box by the length of the elongated hole of the bracket. By sliding, the rear part is lifted and moved backwards, so even if the distance between the front of the cargo box and the driver's seat located in front of this cargo box is reduced, the two will not interfere. , the dead space in that area can be minimized, thereby making it possible to make the packing box longer than before, and further increasing the loading capacity of the packing box.

Further, when the cargo box is tilted, the hook member provided at the rear end of the telescoping cylinder engages with the engagement member at the rear of the vehicle body frame, so that the cargo box can be stably tilted by the engagement of both.

Furthermore, the other end of the arm that makes up the link mechanism that lifts the rear part of the cargo box is pivoted below the top surface of the vehicle frame, allowing the link mechanism to be placed compactly between the vehicle frame and the cargo box. As a result, in order to avoid interference with the link mechanism, the recess that forms the rear part of the bottom of the cargo box can be made smaller, making it possible to flatten the bottom of the cargo box. The loading capacity of the vehicle can be increased.

[Brief explanation of the drawing]

1 to 4 show a cargo box tilting device for a garbage collection vehicle, and FIG. 1 is a side view showing the cargo box in a lying state;
Figure 2 is a side view showing the initial state of tilting of the cargo box;
This figure is a side view showing a state in which the cargo box has been tilted, and FIG. 4 is a plan view showing a cargo box tilting device disposed between the cargo box and the vehicle body frame. 10...Vehicle frame, 15...Stopper, 16...
Engagement hole (engagement member), 20... Packing box, 30... Telescopic cylinder, 38... Hook member, 50... Link mechanism, 53... Connection rod, 56... Arm rod.

Claims (1)

[Scope of Claim for Utility Model Registration] A cargo box mounted on a vehicle body frame, a telescoping cylinder whose front end is connected to the front bottom of the cargo box, one end of which is pivoted to the rear end of the telescoping cylinder, and A connecting rod whose other end is pivotally supported at the rear of the bottom of the cargo box and whose one end can be moved to the rear of the loading box by extension of the telescoping cylinder, and which is disposed between an intermediate portion of the connecting rod and the rear of the vehicle body frame. In the cargo box tilting device, the cargo box tilting device includes a link mechanism configured with an arm body, and a stopper that prevents rearward movement of one end of the connecting rod due to extension of the telescoping cylinder, the rear end of the telescoping cylinder having a A hook member is provided, and an engagement member that can be engaged with and detached from the hook member is provided at the rear of the vehicle body frame, and one end of the arm of the link mechanism is attached below the top surface of the vehicle body frame, and A bracket having an elongated hole formed in the front-rear direction of the cargo box is provided at the front bottom of the cargo box, and a pin is provided at the front end of the telescoping cylinder and is slidably fitted into the elongated hole. A cargo box tilting device for a vehicle equipped with a cargo box, characterized in that the front end of the telescoping cylinder is slidably connected to the front bottom of the cargo box by the length of the elongated hole.