JPS6243865Y2 - - Google Patents

Description

[Detailed description of the invention] (Industrial application field) This invention is a dump truck that discharges loads such as earth, sand, gravel, crushed stones, etc. to the rear of the vehicle body by tilting the loading platform. The present invention relates to a chute device that adjusts the discharge speed.

(Prior art) As shown in FIG. 7, the most common dump truck has the rear end opening/closing plate 3 of the loading platform 2 in an unlocked state, and then the loading platform 2 is lifted up by a hydraulic lifting mechanism 4 installed on the vehicle body 1. is rotated and tilted with the rear end side as a pivot point, and the loaded object 5 is allowed to fall naturally by its own weight from the rear end outlet 2a opened by opening the opening/closing plate 3. However, in the past, since the loaded material 5 is discharged all at once, for example, during a work process such as road surface paving work, the transported soil, gravel, crushed stone, etc. is laid down at a constant thickness on the base surface of the road bed 6, etc. In this case, it was necessary to level the loaded material 5 discharged from the dump truck and stacked to a certain thickness using mechanical power such as a bulldozer or human power.

(Purpose of the invention) This invention enables the work of laying the loaded material with a constant thickness on the base surface of the road bed etc. by adjusting the discharge speed and moving the vehicle forward when discharging the loaded material from the dump truck. The purpose is to provide a means to do both at the same time.

(Structure of the device) This device is a chute device that is detachably attached to the end of the tilting platform of a dump truck for discharging loaded materials to the rear of the vehicle body. It is constructed in the shape of a box frame with the front side facing the rear end of the loading platform open, and has a volume space in which the opening/closing frame plate at the rear end of the loading platform can be opened to the inside of the main body when the loading platform is tilted. The present invention relates to a dump truck chute device having a slit with a variable opening width between the slits.

(Example) Hereinafter, an example of this invention will be described based on FIGS. 1 to 6. 11 is the dump truck body, 12
is a hydraulic push-up mechanism (not shown) with the rear side as the pivot point.
Accordingly, the loading platform tilts as shown in the dashed line in the first diagram, 1
Reference numeral 3 denotes the main body of the chute device attached to the rear end of the carrier 12, and 14 indicates a load such as earth, sand, gravel, crushed stone, etc. loaded onto the carrier 12.

The shoot device main body 13 includes substantially quadrilateral left and right side plates 15, 15 whose front upper sides are protruding, a bottom plate 16 integrally installed between the lower ends of the side plates 15, 15, and A front side 13a facing the rear end of the loading platform 12 from a rear end plate 18 pivotally connected at the upper end via a pivot 17 installed between the rear upper part.
It has a box frame shape with the upper part 13b open and a slit 19 formed between the bottom plate 16 and the rear end plate 18 on the bottom side. Therefore, a mounting shaft 20 that also serves as a reinforcing shaft is installed between the front upper parts of the side plates 15, 15, and three contact pieces 21 made of angle iron are provided on the upper surface side of the front edge of the bottom plate 16. The bottom plate 16 is fixed at intervals, and the bottom plate 16 is further reinforced by welding and fixing reinforcing rods 22 made of iron pipe material arranged along the slits 19 at the rear end side. It should be noted that the reinforcing rod 22 may be made of other materials such as angle iron. Also,
Arc-shaped slots 23 are bored in each of the rear end sides of the side plates 15, 15, and nuts 24 are fixed at positions corresponding to the slots 23 on both side edges of the inner surface of the rear end plate 18. The bolt part 25a of the L-shaped handle 25 is screwed into the nut 24 from the outside through the slot 23, and the rear end plate 18 is rotatable around the pivot 17 within the range of the slot 23, and can be rotated as desired. By tightening the handle 25 at this position, the side plate 15 and the flange portion 25b of the handle 25 are brought into pressure contact and fixed. Therefore, the width of the slit 19 can be set arbitrarily.

On the other hand, on the rear end side of the dump truck loading platform 12, an opening/closing frame plate pivot piece 27 is protruded from the upper part of the rear end of both side frame plates 26, 26, similar to the conventional one. The opening/closing frame plate 28 at the rear end is fixed to the inside upper part and is pivotally connected via a bracket 28a that protrudes upward.
A plurality of lock pieces 28b, 28b are provided at the lower part thereof so as to protrude downward at predetermined positions except when ejecting 4.
It is configured to be fixed to the bottom of the loading platform 12 via. Therefore, both side frame plates 26, 26
At a position closer to the front than the pivot piece 27, hook pieces 29 each having a notch 29a on the front side are protruded.

The chute device main body 13 is attached to the rear end of the loading platform 12 when discharging the loaded object 14, and as shown in FIGS. At the same time, the mounting shaft 20 is engaged with the notch 29b of the hook piece 29 in a state where it overlaps with the outside of the hook piece 29, and the contact pieces 21...
It is attached by bringing it into contact with the rear end surface of the bottom plate 30 of. Under this installation condition, the shoot device main body 13
The main body 13 is held in a stable posture because its weight acts in a direction to rotate the main body 13 toward the vehicle body 11 around the mounting shaft 20. Therefore, the operation of discharging the loaded object 14 is performed by tilting the loading platform 12 after the opening/closing frame plate 28 is in an unlocked state.
As a result of this operation, as shown in FIG. 6, the opening/closing frame plate 28 opens toward the inner space 13c of the chute device main body 13 due to its own weight and the pressure of the loaded object 14. It flows into the interior and falls onto the track bed 31 from the slit 19 at a constant rate. Therefore, if the vehicle body 11 is moved forward at a constant speed during this discharge, a loaded layer 14a of a constant thickness is laid on the road bed 31. Note that since the lock piece 28b provided at the lower end of the opening/closing frame plate 28 is located at a position offset from the contact piece 21 of the shoot device main body 13, there is no problem in the opening operation of the opening/closing frame plate 28.

In the above embodiment, the opening width of the slit 19 is adjusted by changing the rotational position of the rear end plate 18, but other opening width adjusting means such as attaching a slide plate 12 to the bottom plate 16 may also be used. good.

(Unique effects of the invention) According to the dump truck chute device according to this invention, the falling speed of the loaded material discharged to the rear of the vehicle body can be arbitrarily adjusted by tilting the loading platform, and it is possible to drop the loaded material little by little at a fixed rate. For example, when laying a load with a constant thickness on the base of a road bed during road paving work, etc., the above discharge can be carried out while moving the vehicle forward at a constant speed, eliminating the need for conventional ground leveling using mechanical or human power. The excellent effect is that the work is omitted or simplified and the workability is greatly improved. In addition, since the chute device body is detachable from the loading platform, it is possible to remove everything other than the load discharger so that it does not interfere with the operation of the dump truck, and it is possible to use one chute device body at the construction site. It has the advantage that it can be shared by multiple dump trucks.

[Brief explanation of the drawing]

1 to 6 show an embodiment of the dump truck chute device according to this invention, and FIG. 1 is a side view of the dump truck with the chute device attached;
Fig. 2 is a perspective view of the chute device main body, Fig. 3 is a sectional view of its main parts, Fig. 4 is a side view showing the installation of the chute device, Fig. 5 is a longitudinal sectional view after the same is installed, and Fig. 6
The figure is a longitudinal sectional view of the main part when the loaded object is discharged, and FIG. 7 is a side view of the main part in the conventional loaded object discharge state. 11... Vehicle body, 12... Loading platform, 13... Chute device main body, 13a... Front side, 14... Loaded object, 15... Side plate, 16... Bottom plate, 18... Rear end plate, 19... Slit , 28... Opening/closing frame board.

Claims (1)

[Scope of utility model registration request] A chute device that is detachably attached to the rear end of a tilting platform of a dump truck for discharging a loaded object to the rear of the vehicle body, and the main body of the chute device is connected to the rear end of the platform from both side plates, a bottom plate, and a rear end plate. It is constructed in the shape of a box frame with the front facing side open, and has a volume space in which the opening/closing frame plate at the rear end of the loading platform can be opened to the inside of the main body when the loading platform is tilted, and an opening width is provided between the bottom plate and the rear end plate. A chute device for a dump truck, comprising a slit having a variable slit.