JP3410367B2 - Load discharge device in dump truck - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a load discharging device for a dump truck capable of discharging a required amount of a load such as earth and sand or an asphalt mixture loaded on a bed.

[0002]

2. Description of the Related Art Conventionally, for example, when paving a road surface with an asphalt mixture, the asphalt mixture is loaded on a dump truck bed, and the asphalt mixture is dumped from the rear end of the luggage bed at the construction site. It is discharged onto the road surface and the discharged asphalt mixture is rolled by rollers.

[0003]

However, when the road surface is entirely paved with a large amount of asphalt mixture, all the asphalt mixture loaded on the dump truck may be dropped and discharged onto the road as described above. But in recent years
When partially repairing small scattered road surfaces that need to be frequently performed as important road surface repair work,
If the amount of asphalt mixture used is limited and the platform is dumped and the asphalt mixture is dropped onto the road surface, an excessive amount of asphalt mixture will be discharged, and the excess asphalt mixture discharged will be discharged. In addition to the large amount of labor and time required for disposal, the work efficiency decreases, and the material cost is wasted and uneconomical.

For this reason, when repairing a part of the road surface, an operator rides on the loading platform of the dump truck and supplies the load to the road surface with a scoop or the like. However, the work is not only dangerous. However, similarly to the above, there is a problem that a great deal of labor is required. Such a problem is that if a screw conveyor or a belt conveyor is installed in an appropriate place on the loading platform, the required amount of asphalt mixture can be discharged by the conveyor, but the conveyor device not only increases the cost. Since the asphalt mixture remains in the conveyor even after the desired amount of the asphalt mixture is discharged, the subsequent treatment requires labor and maintenance and inspection are troublesome, so that it has not been put into practical use.

The present invention has been made in view of the above problems, and an object thereof is to make it possible to use a simple device such as earth and sand or asphalt mixture which is loaded on a bed without impairing the function as a dump truck. The desired amount of load,
It is an object of the present invention to provide a load discharging device for a dump truck that can discharge and supply.

[0006]

In order to achieve the above object, a load discharging device for a dump truck according to the present invention is configured such that the bottom of the bed of the dump truck has a constant center in the width direction.
The width part is formed on the deepest horizontal bottom part and both
The sides gradually go down from the outer edge towards this horizontal bottom.
The bottom of the ship is formed in the inclined part that
Side flanks are erected upward on both outer edges of the bottom.
At the same time, the upper end is the fulcrum at the rear end
There is a rear flap that can be opened and closed.
A certain length from the rear end of the horizontal bottom of the base to the front
Notch the cutout, and use this notch to insert the trough bottom plate on both sides.
The upper edges of both side plates that are formed on the
Is formed at the load receiving port from the above-mentioned loading platform.
A rear end opening of the rough portion is formed in the discharge port, and an extrusion plate having the same cross-sectional shape as the trough portion is reciprocally disposed in the trough portion while the extrusion plate is reciprocally movable. Has a structure in which a rear end of a horizontal shutter plate for opening and closing the load receiving port is integrally provided on the upper end of the.

In the load discharging device for the dump truck, the invention according to claim 2 uses the push plate as a hydraulic pressure.
It is characterized in that it is configured to reciprocate by a cylinder .

A hydraulic cylinder is preferably used as the means for reciprocating the pushing plate, but a telescopic mechanism such as a jack or an electric cylinder may be adopted.

[0009]

[Operation] Pavement materials such as earth and sand or asphalt mixture are loaded on the bed of the dump truck. At this time, by moving the pushing plate arranged in the trough part to the discharge port of the trough part, the horizontal shutter plate integrally provided at the upper end of the trough part is pulled out backward and Close the loading port that opens on the bottom of the platform to prevent pavement material from entering the trough.

A dump truck loaded with paving material is to be paved on the road surface. When the road surface is entirely paved with a large amount of asphalt mixture, the dump truck is dumped up like a normal dump truck. The tilt is opened, and the load is slid down on the bottom of the loading platform that is slanted downward from the front end to the rear end, and is dropped onto the road surface and discharged.

On the other hand, when partially repairing the road surface,
While maintaining the horizontal state without dumping the cargo bed, the extrusion plate is reciprocally moved back and forth to take in an appropriate amount of the paving material on the cargo bed into the trough, and then the paving material is discharged onto the road surface. That is, when the extrusion plate is moved forward (driver's side) in the trough part, the horizontal shutter plate moves integrally, the load receiving port of the trough part is opened, and the pavement material on the loading platform falls into the trough part. Fill. When the push-out plate is pushed backward from this state, the pavement material in the trough portion is dropped and discharged from the rear end discharge port onto the road surface to be repaired by the push-out plate.

At this time, as the extruding plate moves rearward and pushes out the paving material in the trough portion, the horizontal shutter plate overhangs rearward to gradually close the load receiving port, and the extruding plate pushes the open end of the discharge port. When it reaches to, the loading port is completely closed by the horizontal shutter plate. Therefore, during pushing of the extrusion plate, the trough space on the side opposite to the extrusion surface of the extrusion plate is not filled with the paving material, and the returning movement of the extrusion plate after the paving material is discharged smoothly. Be seen. When the push-out plate is moved back to the original position, the load receiving port is opened by the horizontal shutter plate as described above, and the pavement material, which is the load on the loading platform, is filled and stored in the trough portion again.

In this way, the extrusion plate is reciprocally moved back and forth to fill and discharge a predetermined amount of paving material from the loading platform into the trough portion, and by repeating this filling and discharging, the required amount of paving material can be obtained. Supply the material on the road surface,
Repair the road surface. When the paving material on the rear end of the loading platform is discharged by the extrusion plate through the trough part, the horizontal shutter plate keeps the inlet closed and the rear tilt of the loading platform is kept closed, and the loading platform is angled at an appropriate angle. Dump up and incline to move the paving material on the platform onto the trough. After that, the loading platform is returned to the original horizontal state, and the extrusion plate is reciprocally moved back and forth in the same manner as described above to fill and discharge a predetermined amount of paving material from the loading platform into the trough portion.

As described in claim 2, the bottom portion of the loading platform of the dump truck is deep in the widthwise central portion, and both side portions are formed in a ship bottom shape in which the both sides are inclined downward from both side ends toward the central portion. Since the trough part is provided below the rear part in the central part of the ship bottom, the pavement material on the cargo bed can be intensively moved to the trough part side, and all the pavement material can be discharged smoothly and efficiently. It can be done.

[0015]

BEST MODE FOR CARRYING OUT THE INVENTION Next, a concrete embodiment of the present invention will be described with reference to the drawings.
Is a dump truck, and the bottom of the loading platform 2 is formed on the horizontal bottom 2a that is deepest in the widthwise central constant width portion, and both sides are gradually lowered from the outer ends toward the horizontal bottom 2a. It has a ship bottom shape formed on the inclined sloped portions 2b, 2b. Side flanks 2c, 2c are erected upward at both outer ends of the bottom portion, and a rear flank 2d is provided at the rear end so as to be opened and closed backward with the upper end as a fulcrum. In addition, after this, the tilt 2d is connected by a connecting means such as a pin 12 to a column 13 standing upright from the bottom of the loading platform 2 so as not to be opened even if the loading platform 2 is dumped up.
By releasing this connecting means, it is configured to open in conjunction with the dump up.

Further, a rear portion of the horizontal bottom surface 2a of the cargo bed 2 is cut out from the rear end toward the front over a constant length portion over the entire width, and the cutout portion is formed in the load receiving port of the trough portion 3. ing. The trough portion 3 is the same as the cutout portion, and side plates 3b having a constant height upward toward both ends of a rectangular bottom plate 3a of the same shape.
3b is formed, and the upper edges of the both side plates 3b, 3b are fixed to both side edges of the cutout portion, and the upper end of the opening is formed in the load receiving port 4 from the loading platform 2 and A rear end opening that is open rearward is formed in the discharge port 5 below the rear end of the horizontal bottom surface portion 2a of FIG.

Reference numeral 6 denotes an extruding plate disposed in the trough portion 3 so as to be capable of reciprocating in the front-rear direction. The bottom plate 3a and both side plates 3b, 3b of the trough part 3 are slid respectively, while the rear end of a horizontal rectangular horizontal shutter plate 7 is integrally provided on the upper end so that the horizontal shutter plate 7 can carry the above-mentioned load. The receiving port 4 is configured to be opened and closed. The horizontal shutter plate 7 moves back and forth integrally with the push-out plate 6, and when the push-out plate 6 moves forward, the horizontal shutter plate 7 slides on its upper surface to the outer bottom surface of the horizontal bottom surface portion 2a of the loading platform 2. It is stored under the outer bottom surface.
The push-out plate 6 and the horizontal shutter plate 7 are formed separately, and the push-out plate 6 is provided on the upper end of the horizontal shutter plate 7.
The rear end may be fixed, but the extrusion plate 6 and the horizontal shutter plate 7 may be formed by bending a rectangular metal plate material in an inverted L-shape in cross section so as to be connected at right angles to each other.

The push-out plate 6 is reciprocated in the front-rear direction by a fluid pressure cylinder such as a hydraulic cylinder, or an expansion / contraction mechanism such as an electric cylinder or a jack. In the embodiment, the hydraulic cylinder 8 is used as the expansion / contraction mechanism. There is. The hydraulic cylinder 8 is mounted in the front-rear direction on the bottom surface of the horizontal bottom surface 2a of the loading platform 2 in front of the trough portion 3, and the tip of the piston rod 8a is connected and fixed to the central portion of the front surface of the extrusion plate 6. is doing.

Like the conventional dump truck, the loading platform 2 is dumped by a hydraulic cylinder 10 whose rear end is pivotally attached to the rear end of the chassis so as to be vertically rotatable so as to connect the chassis and the loading platform 2. It is configured to be uploaded. Also,
An electric insulation jacket (not shown) is attached to the bottom of the loading platform 2. When the load is an asphalt mixture, the asphalt mixture is attached to the upper surface of the loading platform 2 and the asphalt mixture is kept at a temperature suitable for paving for a long time. It is configured so that it can be held.

Explaining the usage mode of the load discharging device in the dump truck configured as above, the load is a paving material 11 such as earth and sand or an asphalt mixture,
The paving material 11 is loaded on the carrier 2 and transported to the road to be paved. When the pavement material 11 is loaded on the platform 2, as shown in FIG. 2, the extrusion plate 6 in the trough portion 3 is moved to the pavement material discharge port 5 of the trough portion 3, and the extrusion is performed. The horizontal shutter plate 7 integrated with the plate 6 is pulled out rearward from the lower surface side of the horizontal bottom surface portion 2a of the loading platform 2 to completely close the upper end receiving port 4 of the trough portion 3.

When the dump truck travels up to the road to be paved, the loaded paving material 11 is discharged onto the road surface and the road surface is paved. At this time, when the road surface to be paved is wide, after removing the pin 12 which is a connecting means between the rear tilt 2d and the pillar 13 standing upright on the bottom of the loading platform 2, the hydraulic cylinder 10 is used as in the conventional dump truck. By extending the piston rod of 1, the dump truck 2 is dumped up to open the rear tilt 1d, and at the same time, the cargo bed 2 is tilted obliquely downward from the front end to the rear end. On the outer surface of the loading platform 2 toward the rear, dropping from the rear end of the downward tilt to the road surface,
It is what is released.

In a small-scale repair work that requires repairing a road surface at a plurality of places, the rear of the cargo bed 2 is tilted.
With the 2d closed, a desired amount of paving material 11 is sequentially supplied to the road surface portion to be repaired through the trough portion 3.

Paving material on the loading platform 2 using the trough section 3
In order to discharge 11 to the road surface in a dispensed manner, first, the piston rod 8a of the hydraulic cylinder 8 mounted on the lower surface of the loading platform 2 is contracted, and the push plate 6 moves forward and the horizontal shutter plate 7 is also integrated. 4 to be stored on the lower surface side of the luggage carrier 2 and, as shown in FIG. 4, the receiving port 4 of the trough portion 3 which was closed by the horizontal shutter plate 7 is opened and the paving material 11 on the luggage carrier 2 is opened. As it opens, the trough part 3 is dropped and filled.

Next, the piston rod of the hydraulic cylinder 8
When 8a is extended, the extrusion plate 6 moves toward the rear end discharge port 5 and the paving material 11 filled in the trough portion 11
As shown in FIG. 5, it is pushed forward and dropped from the discharge port 5 onto the road surface. At this time, the horizontal shutter plate 7 having the rear end integrally connected to the upper end of the push-out plate 6 is pulled out from the lower surface side of the loading platform 2 as the push-out plate 6 moves, and the receiving port 4 of the movement trace of the push-out plate 6 is obtained. To prevent the discharge port 5 on the loading platform 2 from filling the trough portion 3.

When the extrusion plate 6 reaches the discharge port 5 and discharges all the paving material 11 in the trough portion 3 from the discharge port 5 to the road surface, the piston rod 8a of the hydraulic cylinder 8 is contracted again to move the extrusion plate 6 forward. The horizontal shutter plate 7 to release the closing of the inlet 4 and the paving material 11 on the loading platform 2
After receiving a predetermined amount from the receiving port 4 into the trough portion 3, the piston rod 8a of the hydraulic cylinder 8 is extended to discharge the pavement material 11 filled in the trough portion 3 onto the road surface to be repaired as described above. The horizontal shutter plate 7 closes the receiving port 4 while discharging from the outlet 5.

In this way, by reciprocating the extruding plate 6 back and forth once, the paving material 11 on the loading platform 2 is filled into the trough portion 3 and discharged from the discharge port 5 to the road surface. Yes, this filling and unloading process is repeated according to the size of the repair area of the road surface, and after supplying the required amount of paving material 11 on the road surface, the dump truck 1 is moved to the next road surface repair location, and in the same manner. The operation of receiving the pavement material 11 on the loading platform 2 into the trough section 3 by the operation of the extrusion plate 6 and then discharging it is sequentially performed.

The trough portion 3 is a horizontal bottom portion 2a of the loading platform 2.
The pavement material 11 on the rear side of the loading platform bottom is slid on the sloped portions 2b and 2b as the pavement material 11 on the upper side thereof is discharged through the trough portion 3 to the road surface side. Is moved to the receiving port 4 side of the trough part 3, is received in the trough part 3 when the horizontal shutter plate 7 is opened, and is discharged from the discharge port 5 by the pushing plate 6.

When the paving material 11 on the rear end side of the loading platform 2 is almost discharged through the trough section 3, the upper end receiving port 4 of the trough section 3 is closed by the horizontal shutter plate 7 and the rear tilt 2d.
While maintaining the closed state in which the column is connected to the column 13 by the pin 12, the hydraulic jack 10 for dumping is operated to tilt the platform 2 from the horizontal state by an appropriate angle with the rear end as a fulcrum, as shown in FIG. The bed 2 is inclined downward from the front end toward the rear end to move the paving material 11 on the front part of the bed 2 to the rear end side of the bed 2, and then the bed 2 is returned to the original horizontal state. In this state, by reciprocating the pushing plate 6 in the trough portion 3 as described above,
After the pavement material 11 on the loading platform 2 is received in the trough section 3, the work is carried out by operating the extrusion plate 6.

The forward / backward movement of the push-out plate 6 by the hydraulic cylinder 8 and the operation of the hydraulic jack 10 for dumping are performed by remote control by a remote control switch.

[0030]

As described above, according to the load discharging device for the dump truck of the present invention, the upper end is formed at the rear portion of the bottom of the dump truck bottom, and the rear end is formed at the bottom of the load. A trough portion formed at a discharge port opening to the rear is provided, and an extrusion plate for a load is disposed in the trough so as to reciprocate in the front-rear direction, and the load inlet is opened and closed at the upper end of the extrusion plate. Since the rear end of the horizontal shutter plate is integrally provided, the structure is simple, the manufacturing is easy, and it can be provided at a low cost. Of course, the horizontal shutter plate closes the upper end load receiving port of the trough part. Then, the bottom of the cargo bed has the same structure as a conventional dump truck, and the cargo bed is dumped up to discharge the load such as paving material on the cargo bed from the rear end of the cargo bed. It can be.

When the pushing plate in the trough is moved forward while the loading platform is kept horizontal, the horizontal shutter plate closing the load receiving port at the upper end of the trough is integrated with the pushing plate. Since the horizontal shutter plate is also horizontally moved forward, the inlet can be opened simultaneously with the movement of the extrusion plate, and the load on the loading platform of the dump truck can be moved by its own weight without requiring manual labor. It is possible to drop and fill the trough part with certain amount, and by moving the extrusion plate from this state toward the rear end discharge port of the trough part, the load filled in the trough part is discharged. Can be discharged smoothly.

At this time, since the horizontal shutter plate integrated with the push-out plate is pulled out toward the receiving port side to gradually close the receiving port, the pushing plate is being discharged while the loading plate is discharging by the pushing plate. It is possible to prevent the load from falling from the loading platform side into the front trough part, and therefore, there is no hindrance to the return movement of the extrusion plate after discharging the load inside the trough part. At the same time as the opening of the receiving port, the loading of the load from the loading platform side into the trough portion through the receiving port is smoothly performed.

Further, since the trough portion is provided on the rear side of the loading platform in the dump truck, the rear tilt is closed after the load on the loading platform rear portion is discharged through the trough portion by the operation of the extrusion plate. By loading the loading platform at an appropriate angle, the load loaded on the front side can be moved to the trough side, and then the loading platform is returned to the horizontal state and the extrusion plate is loaded in the same manner as above. By reciprocating back and forth, it is possible to fill and discharge a predetermined amount of paving material from the loading platform into the trough section, and therefore to discharge all the load on the loading platform efficiently and reliably through the trough section in desired amounts. Is what you can do.

Further , according to the present invention, the bottom of the cargo bed is formed in a ship bottom shape in which the central portion in the width direction is deep and both side portions are inclined downward from both side ends toward the central portion .
Thus, the paving material on the platform can be intensively moved to the trough side, and all the paving material can be discharged smoothly and efficiently.

As described above, the trough portion is provided below the rear portion of the bottom of the loading truck in the dump truck, and the extrusion plate that reciprocates back and forth in the trough portion causes a small amount of the load falling from the loading platform into the trough portion to be discharged from the outlet. Since it is configured to discharge, in small-scale repair work that requires multiple parts of the road surface to be repaired with asphalt mix, the asphalt mix loaded on the loading platform is dispensed from the trough section according to the repair area. Therefore, it is possible to efficiently use the expensive asphalt mixture and to efficiently perform the repair work by eliminating the extra post-treatment of the asphalt mixture due to the unnecessary discharge.

[Brief description of drawings]

FIG. 1 is a simplified perspective view of a dump truck equipped with a discharging device,

FIG. 2 is a simplified side view of a cross section of the loading platform,

FIG. 3 is a perspective view of a trough portion,

FIG. 4 is a vertical cross-sectional side view showing a state in which a pavement material is received in a trough portion,

FIG. 5 is a vertical cross-sectional side view of the paving material being discharged from the trough portion,

FIG. 6 is a simplified vertical cross-sectional side view when a load is moved to the rear part of the loading platform.

[Explanation of symbols]

1 dump truck 2 loading platform 2a Horizontal bottom 3 trough 4 entrance 5 outlets 6 Extrusion plate 7 Horizontal shutter plate 8 hydraulic cylinders

─────────────────────────────────────────────────── ─── Continuation of front page (56) References JP-A-64-37390 (JP, A) Actual development S59-26438 (JP, U) Actual development S55-2900 (JP, U) (58) Survey Field (Int.Cl. ⁷ , DB name) B60P 1/28 E01C 19/12

Claims (2)

(57) [Claims] 1. The bottom of the bed 2 of the dump truck 1 has a width
The central constant width part in the direction is formed on the deepest horizontal bottom part 2a.
And both sides from the outer edge to this horizontal bottom 2a
Formed in the inclined portions 2b, 2b that are gradually inclined downward toward
The bottom of the boat is shaped like
Once the side tilts 2c and 2c are erected, and at the rear end
Rear tilt 2d that can be opened and closed backward with the upper end as a fulcrum
And a horizontal bottom surface 2a of the loading platform 2
Cut out a certain length from the rear end to the front of the rear part.
The trough part 3 on both sides of the bottom plate 3a.
Secure the upper edges of both side plates 3b, 3b that are
Formed at the loading port 4 from the loading platform 2
The rear end opening of the trough part 3 is formed in the discharge port 5,
An extrusion plate 6 having the same cross-sectional shape as the trough portion 3 is reciprocally disposed in the trough 3 and is reciprocally movable in the front-rear direction, and a horizontal shutter plate 7 for opening and closing the load receiving port 4 is provided at the upper end of the extrusion plate 6 . A load discharging device for a dump truck having a rear end integrally provided. 2. The load discharging device for a dump truck according to claim 1, wherein the pushing plate is reciprocated by a hydraulic cylinder.