JPH0357551Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a rear sliding door support device for a vehicle equipped with a cargo box tilting device.

(Prior Art) A conventional vehicle equipped with a cargo box tilting device will be described using, for example, a small garbage collection vehicle as an example.

Figure 4 shows this garbage collection vehicle. In the figure, a is a vehicle body frame, a cargo box b is mounted on the vehicle body frame a, and a fan door e is provided at the rear of the cargo box b so that it can be opened and closed. ing. A telescopic cylinder c whose front end is rotatably supported at the front bottom of the cargo box b is arranged between the vehicle body frame a and the cargo box b. A lifting link mechanism d is located at the rear end of the telescopic cylinder c, and a loading box b.
are pivotally connected to the rear bottom portion of the vehicle body frame a and the rear portion of the vehicle body frame a. When the telescopic cylinder c is extended, the rear part of the cargo box b is first lifted up by the link mechanism d (see the dashed line in Fig. 4).
The front part of the is lifted. That is, the rear part of the cargo box b is lifted to a predetermined height from the vehicle body frame a, and the cargo box b is tilted rearward (see the two-dot chain line in FIG. 4).
As a result, the garbage stored in the cargo box b can be quickly and easily discharged from the rear of the cargo box a with the fan door e opened. In addition, the cargo box b tilted in this way
In order to make it face down, it was done by doing the opposite of the above.

(Problems to be solved by the invention) However, in the above-mentioned conventional structure, when a tilted cargo box is laid down, it is difficult to solve the problem due to the resistance generated in each connecting part connecting the telescopic cylinder and the link mechanism. , a problem arises in that the rear part of the lifted cargo box does not lie down. Additionally, when the rear of the cargo box is lifted up with the sliding door open, the sliding door and the vehicle body frame interfere, causing the tip of the sliding door to become wedged in the top surface of the vehicle body frame (the fourth (See the dashed line in the figure)
Problems arise in that the cargo box cannot be tilted or laid down, and the sliding door is damaged.

(Means for Solving the Problems) The rear sliding door support device for a vehicle equipped with the cargo box tilting device of the present invention includes a vehicle body frame, and a rear sliding door that is mounted on the vehicle body frame and whose rear part can be opened and closed by the sliding door. a cargo box, a telescoping cylinder whose front end is connected to the front bottom of the cargo box, and a telescoping cylinder connected to the rear end of the telescoping cylinder and rotatably supported at the rear of the vehicle body frame and the rear lower part of the cargo box. A loading box tilting device having a link mechanism that lifts up the rear part of a loading box by extending a telescopic cylinder, the base end of which is pivotally supported by the link mechanism, and a supporting member rotatably supported at the free end. The rod is guided by a guide member provided on the vehicle body frame and is disposed so as to be movable in the front and back direction, and the support rod is provided with an urging member that urges the support rod forward, so that when the cargo box is tilted, The tip of the support rod protrudes rearward to support the opened sliding door, and when the cargo box is tipped over, the support rod is urged forward by the biasing member, thereby retracting the telescopic cylinder. It is designed to assist.

(Function) When the loading box is tilted, the loading box is tilted with the rear part of the loading box lifted by the link mechanism, and the tip of the support rod pivotally supported by this link mechanism touches the rear end of the vehicle body frame. This tip moves to protrude further than the rear door and supports the opened rear door.
Moreover, since the support rod is biased forward by the biasing member, it assists the retracting operation of the telescoping cylinder when the cargo box is laid down.

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

In this example, a rear sliding door support device for a vehicle equipped with a cargo box tilting device will be described, taking as an example a device applied to a small garbage collection vehicle.

FIGS. 1 to 3 show the schematic structure of this garbage collection vehicle.

In the figure, 1 is a vehicle body frame, and a cargo box 2 is mounted on this vehicle body frame 1. A swing door 3 is rotatably provided at the rear of the cargo box 2. A telescopic cylinder 5 for tilting the cargo box 2 is arranged between the vehicle body frame 1 and the cargo box 2 in the front-rear direction. The front end 5a of the telescoping cylinder 5 is rotatably supported by a bracket 6 fixed to the front bottom of the cargo box 2, and the rear end 5b of the telescoping cylinder 5 is connected to a connecting member 7 shown in FIG. The link mechanisms 8 and 8 are respectively connected to link mechanisms 8 and 8 that are arranged symmetrically with respect to the telescopic cylinder 5 through the link mechanisms 8 and 8, respectively. Hereinafter, one link mechanism 8 will be explained. One end of the link mechanism 8 is connected to the connecting member 7, and the other end is rotatably supported by a bracket 10 fixed to the rear bottom of the cargo box 2. The arm body 12 is rotatably supported at the other end by a bracket 1a fixed to the rear of the vehicle body frame 1, and whose one end is connected to a midway portion of the link 11. There is. A rolling roller 13 capable of moving the vehicle body frame 1 is rotatably supported at one end of the connecting rod 11 by a pivot pin 14 shown in FIG.

A stopper 15 is provided at the rear of the vehicle body frame 1 to collide with a rolling roller 13 that moves due to the extension of the telescopic cylinder 5 and stop the movement. Further, although not shown in the drawings, the link mechanisms 8, 8 are provided at the rear end 5b of the vehicle body frame 1 or the telescopic cylinder 5.
A holding member is provided to hold the rear part of the cargo box 2 lifted from the vehicle body frame 1 in this state.

The extension portion 14a of the pivot pin 14 that rotatably supports the rolling roller 13 has a proximal end portion 1 of the support rod 16.
6a is pivotally supported. This support rod 16 is inserted through a guide hole 17a formed in a guide member 17 fixed to the rear of the vehicle body frame 1, and is disposed substantially parallel to and rearward of the vehicle body frame 1, and is supported at the tip 16b. For example, a roller 18 is rotatably supported as a member. This support rod 16 is guided by a guide member 17 and moves in the front-rear direction as the rolling roller 13 moves due to the expansion and contraction of the telescopic cylinder 5, and is supported when the rolling roller 13 collides with the stopper 15. The tip 16b of the rod 16 has a length that protrudes beyond the rear end of the vehicle body frame 1. The roller 18
By supporting the fan door 3 that is opened when discharging the garbage stored in the cargo box 2, the fan door 3 and the vehicle body frame 1 are prevented from interfering with each other. It is preferable to have elasticity so that it will not be damaged. Further, a spring 19 is interposed between the base end member 16a and the guide member 17 on the peripheral surface of the support rod 16, and the spring 19 causes one end of the connecting rod 11 and the rolling roller 13 to move forward. It is designed to be energized. In other words, the retraction operation of the telescopic cylinder 5 is assisted.

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

As shown in FIG. 1, when the telescopic cylinder 5 is extended with the cargo box 2 in the prone position, the rolling roller 13 moves on the vehicle body frame 1 and the stopper 15
collide with. As a result, one end of the rolling roller 13
The connecting rod 11 that rotatably supports the cargo box 2 is erected to lift the rear part of the cargo box 2, and the rear part of the cargo box 2 lifted from the vehicle body frame 1 is held in that state by the holding member. Furthermore, when the telescopic cylinder 5 is extended, the front part of the cargo box 2 is lifted up, and as shown in FIG. 2 is tilted, the sliding door 3 at the rear of the cargo box 2 is opened, and the garbage in the cargo box 2 is discharged from the rear. Here, as the rolling roller 13 moves, the support rod 16 moves rearward so that its tip 16b protrudes beyond the vehicle body frame 1. The supported roller 18 supports the outer surface of the fan door 3 that is opened when discharging garbage. Therefore, the sliding door 3 does not interfere with the vehicle body frame 1.

Next, in order to return the cargo box 2 that has been tilted in this manner to the prone position, the above-mentioned operation is reversed. That is, when the extended telescopic cylinder 5 is retracted, the front part of the cargo box 2 first descends, and the holding member holding the rear part of the cargo box 2 in a lifted state is released. Then, when the telescopic cylinder 5 is further retracted, the rolling roller 13 moves forward, the connecting rod 11 is laid down, and the rear part of the cargo box 2 is lowered. When the rear part of the cargo box 2 is lowered, the spring 19 interposed in the support rod 16 urges the rolling roller 13 forward, thereby assisting the retracting operation of the telescopic cylinder 5.
Therefore, the telescopic cylinder 5 can be retracted and retracted smoothly, and the rear part of the cargo box 2 can be lowered easily and smoothly.

(Effects of the invention) As described above, according to the invention, the retracting action of the telescopic cylinder is assisted by the spring installed in the support rod, so that when the cargo box is laid down, the The lowering operation of the rear part can be performed easily and smoothly. In addition, even if the sliding door is opened wide when the cargo box is tilted, the tip of the support rod that protrudes rearward from the rear end of the vehicle body frame supports the sliding door, preventing interference between the sliding door and the vehicle body frame. Therefore, unlike the conventional case, the tilting or overturning operation of the cargo box is not obstructed, and the sliding door is not damaged.

[Brief explanation of the drawing]

1 to 3 show a garbage collection vehicle equipped with a rear sliding door support device in a vehicle equipped with a cargo box tilting device according to the present invention, and FIG. 1 is a side view showing the cargo box in a prone state; Fig. 2 is a partially omitted side view showing the tilting state of the cargo box, Fig. 3 is a plan view showing the telescoping cylinder, link mechanism, and support rod located between the cargo box and the vehicle body frame, and Fig. 4 1 is a side view showing a garbage collection vehicle equipped with a conventional cargo box tilting device. 1...Vehicle frame, 2...Logging box, 3...Flip door, 5...
... telescopic cylinder, 8 ... link mechanism, 16 ... support rod, 17 ... guide member, 18 ... roller (support member), 19 ... spring (biasing member).

Claims (1)

[Scope of Claim for Utility Model Registration] A vehicle body frame, a cargo box mounted on the vehicle body frame whose rear part can be opened and closed by a sliding door, and a telescoping cylinder whose front end is connected to the front bottom of the cargo box. and a link mechanism connected to the rear end of the telescoping cylinder and rotatably supported by the rear portion of the vehicle body frame and the rear lower part of the cargo box to lift the rear part of the cargo box by extension of the telescoping cylinder. In the apparatus, a support rod has a base end supported by the link mechanism and a support member rotatably supported at a free end of the support rod,
The support rod is disposed so as to be movable in the front and rear directions while being guided by a guide member provided on the vehicle body frame, and the support rod is provided with an urging member that urges the support rod forward.
When the cargo box is tilted, the tip of the support rod protrudes rearward to support the opened sliding door, and when the cargo box is tipped over, the support rod is urged forward by the biasing member to expand and contract. A rear sliding door support device for a vehicle equipped with a cargo box tilting device, characterized in that the device is configured to assist the retracting operation of a cylinder.