JPS5930576B2 - Side chute device for side dump truck - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a side chute device for dropping a loaded object far away from the vehicle body in a side dump truck.

In general, in a rear dump truck, there is a certain distance between the rear end of the cargo box and the rear tires, so when a load such as earth and sand is dropped backwards, the load interferes with the rear tires. There was nothing to do.

However, in a side dump truck, there is only a small gap between the side edge of the cargo box and the rear tires, so when the loaded item is dropped to the side, the loaded item may interfere with the rear tires. There was a problem.

On the other hand, a technique for solving this problem by using a side shoot is also disclosed in, for example, Japanese Utility Model Publication No. 35-17212.

However, in this conventional technology, the side chute is pivotally supported on the vehicle body frame, and when the cargo box is tilted, a roller on the lower edge of the cargo box pushes an arm connected to the side chute to rotate the side chute. There is a concern that when an excessive load is applied due to shipping, the side chute may rotate in the opposite direction and lift the cargo box, causing the cargo box to fall off the hinge.

In view of this, the present invention aims to solve the above conventional problems by attaching the side chute to the cargo box side and operating the side chute using a separately provided operating mechanism. That is.

In the side chute device for a 4-dump truck according to the present invention, one side of the side chute is screwed onto the outer side of a cargo box frame constituting the cargo box, and the side chute is suspended from the cargo box.

An operating mechanism including a link or the like that extends the side chute to the side of the cargo box is provided between the cargo box frame and the side chute.

Therefore, when side dumping a cargo box, if the side chute is extended to the side by operating the operating mechanism, the cargo in the cargo box will fall further away from the vehicle body along the side chute, interfering with the vehicle body, especially the rear tires. Since the load of the discharged cargo does not act in the box lifting direction yet, there is no fear of the box falling off.

DESCRIPTION OF THE PREFERRED EMBODIMENTS The configuration of the present invention will be described below with reference to the drawings.

Embodiment 1 In this example, as shown in FIGS. 1 to 5, 1 is a side dump truck, and a cargo box 3 is mounted on a vehicle body frame 2 so as to be tiltable laterally.

The cargo box 3 has a fixing column 5 and a front plate 6 erected on a cargo box frame 4, and the fixing column 5 is provided with a side sliding door 7 and a rear sliding door 8.

One side of a side chute 9 is rotatably hinged to the outer side of the cargo box frame 4 via a hinge 10, and the four side chute 9 are suspended therefrom.

The side chute 9 is provided extending from the front to the rear of the cargo box 3 and is divided into three parts, in which a securing pin 45 for automatically opening and closing the side fan door 7 is located.

The keyboard 9 is made up of a single plate 12 with reinforcing members 13 and 14 fixed to the upper and lower sides, and a stiffener 15 fixed between the reinforcing members 13 and 14 on both sleeves.

An operating mechanism 16 for the side chute 9 is provided between the cargo box frame 4 and the sinide chute 9, and a torque shaft 18 is connected to the lower side end of the cargo box frame 4 via a boss 17. Three bell cranks 19 are fixed to the torque shaft 18 at one end.

One end of a link 20 is rotatably connected to the other end of the bell crank 19 by a pin 21, and the other end of the link 20 is rotatably connected to the stiffener 15 of the side chute 9 via a bracket 22 by a pin 23. The bracket 22 is movably pivotally mounted, and the bracket 22 is located approximately at the center of the side chute 9 in the width direction.

An operating lever 25 is fixed to the front end of the torque shaft 18 via a support plate 24, and a locking means 26 is provided.

The locking means 26 prevents the torque shaft 180 from rotating in the direction in which the side chute 9 extends. A guide cylinder 27 whose rear part is open is connected to the support plate 24, and the guide cylinder 27 is equipped with a spring or the like. The elastic body 28 and the engagement piece 29 are fitted into each other.

The engagement piece 29//i is urged rearward to always protrude by the elastic body 28, has a step 30 formed at the bottom of the tip, and is inserted through a long hole 31 formed in the guide cylinder 27. An operating pin 32 that protrudes to the outside is provided.

On the other hand, a secured piece 34 is fixed to the vehicle body frame 2 via a stay 33 in correspondence with the secured piece 29, and the engaged piece 34 is fixed to the vehicle body frame 2 via a stay 33.
4 engages with the stepped portion 30, and when the loading box 3 is tilted to the side in a stored state with the side chute 9 hanging downward, the engaging piece 29 and the engaged piece 34 do not engage with each other. It is automatically released and the side chute 9 maintains a suspended state due to its own weight.

Reference numeral 35 designates a shaft receiving portion that is provided on the vehicle body frame 2 and receives the hinge shaft 11 that protrudes from the back surface of the cargo box 3.

36 is a rear tire.

Next, to explain the action, the side dump truck 10
When driving, etc., the side chute 9 is used as shown in Figure 2.
In the stored state where it is suspended downward, the engaging piece 29 protrudes rearward, the stepped portion 30 and the engaged piece 34 are engaged, and the torque shaft 18 is secured and connected to the side chute 9//'i. It is kept in a stored state.

When unloading a loaded object by tilting the cargo box 3, first, the engaging piece 29 is inserted into the guide cylinder 27 to release the engagement with the engaged piece 34, and then the operating lever 25 is disengaged from the engaged piece 34. When the bell crank 19 rotates as the torque shaft 180 rotates, the link 20 presses the side chute 9 in the axial direction, causing the side chute 9 to protrude laterally ( (See Figure 3).

In this state, the pivot pin 21 between the bell crank 19 and the link 20 is located above the connection line X between the pivot pin 23 between the link 20 and the bracket 22 and the center point of the torque shaft 18, and the side chute 9 does not close (rotate downward) due to the weight of the loaded object, and since the pivot portion 21 of the bell crank 19 and the link 20 is in contact with the reinforcing member 13, the weight of the loaded object is reduced by the weight of the loaded object. They cancel each other out at each position, and no force is applied to the torque shaft 18.

When the cargo box 3 is tilted to the side with the side chute 9 extended, the loaded object falls further away from the vehicle body frame 2 along the side chute 9.

Moreover, when storing the side chute 9, the above operation may be performed in reverse.

In addition, an engagement piece 29 is provided on the operation lever 25 side, and an engagement piece 29 is provided on the operation lever 25 side.
Since the engaged pieces 34 are provided on each side so that the operating lever 25, that is, the side chute 9 can be fixedly held, the side chute does not swing during driving or the like.

The engaged piece 34 is fixed to the vehicle body frame 2 side, and the hinge shaft 11 of the cargo box 3 during side dumping.
The engaging piece 29 located closer to the center in the vehicle width direction rises as the cargo box 3 rises and separates from the engaged piece 34.

In other words, since the lock by the locking means 26 is automatically released during side dumping, the side chute 9 is in a hanging state. For example, even if you forget to operate the side chute 9, the side chute is attached to the vehicle body frame 2, rear tire 36, etc. There will be no interference or damage.

Example 2 This example is similar to Example 1, as shown in FIGS. 6 and 7.
Instead of extending the side chute 9 by rotating the operating lever 25 from below to above, the side chute 9 is extended by rotating the operating lever 25 from above to below. A torque shaft 38 is held at the bottom of the torque shaft 4 in the front-rear direction via a boss 37, and a bell crank 39 is fixed to the torque shaft 38 at one end thereof.

One end of a link 40 is pivotally connected to the other end of the bell crank 39 by a pin 41, and the other end of the link 40 is connected to the stiffener 15 of the side chute 9 via a bracket 42 to a pin 43.
It is pivoted by.

Furthermore, a stopper 44 is fixed to the cargo box frame 4, with which the bell crank 39 comes into contact.

Therefore, when the operating lever 25 is rotated downward, the bell crank 39 is rotated, the link 40 presses the side chute 9 laterally, and the side chute 9 extends (see the chain line in FIG. 6).

In this state, the bell crank 39 is still in contact with the stopper 44, and the pivot pin 4 between the bell crank 39 and the link 40 is
1 is located below the connecting line The weight is applied to the bell crank 39 and the stopper 44 and does not affect the torque shaft 38.

The rest is the same as in Example 1.

As described above, according to the side chute device for the side dump truck of the present invention, the side chute is suspended from the outside of the cargo box frame, and the side chute is stretched laterally when the cargo box is tilted. Since the object can be dropped far from the vehicle body, interference between the loaded object and the rear tires can be reliably prevented.

Furthermore, the side chute can be stored in the interior of the vehicle, and can be opened and closed with one-touch operation using the operating mechanism.

[Brief explanation of drawings]

The drawings illustrate embodiments of the present invention, and FIG. 1 is a side view of a side dump truck, and FIGS. 2 to 5 are examples of embodiment 1.
Fig. 2 is a front view of the main parts of the side chute when it is retracted, Fig. 3 is a front view of the same when it is extended, Fig. 4 is a plan view of the locking means, and Fig. 5 is a front view of the operating mechanism. FIGS. 6 and 7 show the second embodiment, FIG. 6 is a front view of the main part, and FIG. 7 is a rear view of the front part of the operating mechanism. 1...Side dump truck, 2...Vehicle frame, 3
... Loading box, 4... Loading box frame, 7... Side fan door, 9... Side chute, 16... Operating mechanism, 17
．． 37...Boss, 18.38...Torque shaft,
19.39...Bell crank, 20.40...Link, 21,23゜41.43...Pin, 25...Operation lever, 26...Lock means, 27...-Guide tube, 28... Elastic body, 29... Engaging piece, 34... Engaged piece.

Claims (1)

[Claims] One side of the side chute is hinged to the outside of the I M frame, and the side chute is lowered into the cargo box, and the side chute is placed between the cargo box frame and the side chute on the side of the vehicle body. A side chute device for a side dump truck, characterized in that it is provided with an operating mechanism composed of a link or the like projecting out. 2. The operating mechanism includes a torque shaft that is rotatably held in the cargo box frame in the longitudinal direction of the cargo box, a bell crank that has one end fixed to the torque shaft, and a side chute connected to the other end of the bell crank. The side dump truck according to claim 1, comprising a link whose both ends are rotatably connected to a substantially central portion in the width direction, and an operating lever fixed to the torque shaft. Side shoot device. 3. The operating mechanism is located at the overhanging temple of the side chute so that the pivot point between the bell crank and the link is located beyond the connection line between the pivot point between the side chute and the link and the center point of the torque shaft. A four-dish dump device for a side dump truck according to claim 2.