JPS6326325Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a garbage collection vehicle that discharges stored garbage by a dumping method.

[Conventional technology]

In such garbage collection vehicles, a rubber plate is usually interposed between the cargo box and the chassis that supports it, and a contracted dump cylinder is used to prevent the cargo box from bouncing during travel.

[Problem that the invention attempts to solve]

As the weight of the tailgate, etc. increases due to the recent improvement in the compression capacity of loaded garbage, the center of gravity of the cargo box and tailgate will be located on or behind the vertical plane that includes the cargo box pivot axis at the rear end of the vehicle. During driving, the dump cylinder expands due to oil leakage from the gap between the spool of the dump cylinder control directional control valve and the valve housing, causing the cargo box on the undercarriage to float up, causing the maximum stable tilt angle and It tends to reduce driving stability.

Therefore, it is desirable to completely secure the cargo box to the vehicle chassis while the vehicle is running, and to automatically untie the cargo box when the stored waste inside the cargo box is to be discharged. To achieve this, the present invention aims to provide a simple cargo box securing device that utilizes a tailgate locking device provided between the cargo box and the tailgate.

[Means for solving problems]

In this invention, a tailgate equipped with a garbage loading device is pivoted to the rear end opening of a cargo box which is pivoted to the rear end of the vehicle chassis so as to be able to freely tilt rearward, and the tailgate is pivoted to be able to open and close freely between the vehicle chassis and the cargo box. are connected by a dump cylinder, and a position where a first engaging pin attached to the lower front surface of the tailgate is hooked at a closed position of the rear end opening of the cargo box;
In a garbage collection vehicle in which a first hook rotatable between a position where it is disengaged from an engagement pin and an operating cylinder thereof are attached to the bottom of a cargo box, when the cargo box is in a resting state on the vehicle chassis, A second hook is pivotally mounted on the bottom of the cargo box and is rotatable between a position in which a second horizontal engagement pin attached to the front part is hooked and a position in which it is disengaged from the second engagement pin. , between the linkage between the first hook and its operating cylinder and the second hook, when the first hook hooks the first engagement pin, the second hook hooks the second engagement pin. Further, the present invention is characterized in that the second hook is also interlocked and connected so that when the first hook is disengaged from the first engagement pin, the second hook is also disengaged from the second engagement pin.

[Effect]

According to the above configuration, when the rear end opening of the cargo box rested on the vehicle chassis is closed by the tailgate in order to collect dust while driving on the road, the first hook is moved to the first engagement position by the operation of the actuating cylinder. When the dowel pin is hooked and the tailgate is locked to the cargo box, the second hook linked to the first hook hooks the second engagement pin, and the cargo box whose rear end is pivoted to the vehicle chassis is hooked. The front part of the vehicle is secured to the chassis. In this lashing state, the front part of the cargo box is prevented from rising relative to the vehicle platform by the second engaging pin being hooked by the second hook. Even if you do this, the lashing condition of the cargo box will be maintained. It is clear that in order to secure the cargo box more tightly, the second hook may be pivoted to the bottom of the cargo box above the second engagement pin.

In addition, in order to tilt the cargo box rearward and discharge (dump) the stored garbage in the cargo box, the first hook is disengaged from the first engagement pin by the actuating cylinder, and the tailgate is locked with respect to the cargo box. When released, the second hook interlocked with the first hook disengages from the second engagement pin and automatically releases the front part of the cargo box from the vehicle chassis.

[Example] Reference numeral 1 denotes a chassis fixed on the chassis frame 2 of an automobile, 3 indicates a cargo box pivoted to the rear end of the chassis 1 by a shaft 4, and 5 indicates a space between the chassis 1 and the bottom of the cargo box 3. The attached clevis-shaped dump cylinder, 6 is a tailgate that is pivoted by a shaft 7 at the upper end of the rear end opening of the cargo box 3, and 8 is fixed to both sides of the lower front surface of the tailgate 6 through brackets 8a, respectively. horizontal first
Engagement pin 9 indicates a bell crank-shaped first hook that hooks the first engagement pin 8 to restrain the tailgate 6 in the closed position of the rear end opening of the cargo box shown in FIG. 1 hook 9 connects the floor girder 3a of the cargo box 3 with the shaft 10
It is supported by a bracket that cooperates with this.

The front end arm portions of the bell crank-shaped first hooks 9 on both sides are connected via rod-shaped links 11 to arms 13 fixed to both ends of a horizontal torque tube 12, respectively, and the torque tubes 12 are connected to the cargo box 3.
It is rotatably supported by a bracket 3b etc. which is properly fixed to the bottom of the holder. Reference numeral 14 denotes an arm fixed at a proper midpoint of the torque tube 12, and a clevis-shaped operating cylinder (double acting) 15 connects the tip of the arm 14 to the floor girder 3a. Therefore, link 11, arm 13, torque tube 12, and arm 14 are the first
It forms a linkage between the hook 9 and its actuating cylinder 15.

Reference numeral 16 denotes horizontal second engaging pins that are fixedly protruding from both sides of the front part of the vehicle chassis 1, and the second engaging pins 16 are respectively hooked when the cargo box 3 is rested on the vehicle chassis. Hooks 17 are fixed to both ends of a torque shaft 18 rotatably supported by both side floor girders 3a via bearings 3c. Between the torque tube 12 and the torque shaft are first and second hooks 9, 17.
An arm 19 fixedly protruding below the torque tube 12 and a torque shaft are arranged so that the arms 19 and the torque shaft can interlock with each other and hook the corresponding engagement pins 8 and 16, respectively, or can be detached from the corresponding engagement pins. A rod-like link 21 connects the arms 20 fixedly protruding above the arms 18.

The pin engagement surface of the first hook 9 that hooks the first engagement pin 8 of the tailgate 6 has a slope 9a that draws and tightens the first engagement pin at the beginning of locking the tailgate, and a shaft. The counterclockwise movement of the first hook 9 after the first engaging pin 8 reaches the radius line B between the two surfaces 9a and 9b by sequentially connecting the pin floating surfaces 9b along the circular arc C centered at 10 By rotating in the direction, the second hook 17 hooks the second engagement pin 16, but conversely, after the second hook draws and tightens the second engagement pin, the second hook 17 hooks the second engagement pin 16. The first hook may pull and tighten the first engagement pin by rotating clockwise. Of course, the corresponding engagement pins may be hooked by the first and second hooks at the same time.

In addition, the tailgate locking device is Jitsugoku 56-49928.
As shown in the invention, the first hook is automatically disengaged from the first engagement pin before opening the tailgate, and the first hook is automatically disengaged from the first engagement pin after the tailgate is closed.
It shall be controlled by an electrical safety circuit (not shown) which engages the first engagement pin with a hook.

Therefore, when the tailgate 6 is opened to discharge the garbage in the cargo box, when the operating cylinder 15 first contracts, the second hook 17 is disengaged from the engagement pin 16 and the first hook 9 is disengaged from the engagement pin 8. The two hooks are released almost simultaneously, and the two hooks are respectively rotated to the positions shown by the chain lines in Figure 2, and the lashing of the cargo box and the vehicle chassis and the lashing of the tailgate and the cargo box are released, respectively. . When the hook 9 rotates to the position shown by the chain line, the above-mentioned electric safety circuit is activated and the tailgate 6 rotates upward about the shaft 7, so that the cargo box 3 is tilted by the extension of the dump cylinder 5. , expel its built-in garbage.

When the tailgate 6 is fully lowered as shown in Fig. 1 after the cargo box 3 is rested on the vehicle chassis 1 after the garbage has been discharged, the operating cylinder 15 is extended by the action of the electric safety circuit described above, so that the hook is closed. 9 and 17 return to the state shown by the solid line in FIG. 2, and completely secure the tailgate and the cargo box, and the cargo box and the vehicle platform, respectively.

[Effect of idea]

According to the present invention, the cargo box is completely secured to the vehicle chassis by the second hook in conjunction with the rotational movement of the first hook that locks or releases the tailgate for the cargo box resting on the vehicle chassis. Therefore, as the weight of the tailgate and the garbage loading device increases due to the improvement in the compression capacity of the garbage loaded into the loading box, the center of gravity of the loading box and the tailgate will be lowered. Even if the cargo box at the rear end of the vehicle is located on the vertical plane that includes the pivot axis or behind it, the cargo box on the moving vehicle will float up, and the maximum stable inclination angle and running stability of the garbage collection vehicle will be affected. Moreover, there is no need to be careful about securing or releasing the cargo box when driving on the road to collect garbage or dumping (discharging) the garbage stored in the cargo box.

[Brief explanation of the drawing]

Fig. 1 is a side view of a garbage collection vehicle, Fig. 2 is a side view of an embodiment of the present invention, Fig. 3 is a perspective view showing its outline, and Fig. 4 is a sectional view taken along line A-A in Fig. 2. . 1... Vehicle chassis, 3... Loading box, 4... Axis, 5... Dump cylinder, 6... Tailgate, 7... Axis,
8...first engagement pin, 9...first hook, 15...
...Operating cylinder, 16...Second engagement pin, 17...
...Second foot.

Claims (1)

[Utility Model Claims] (1) A garbage collection vehicle in which a tailgate 6 equipped with a garbage loading device is pivotally mounted so as to be able to be opened and closed at the rear end of a cargo box 3 pivotally mounted at the rear end of a chassis 1 so as to be able to tilt rearward, said chassis and the cargo box are connected by a dump cylinder 5, a first hook 9 which is rotatable between a position where it hooks a first engagement pin 8 attached to the lower front surface of the tailgate when the rear end opening of the cargo box is in a closed position and a position where it is released from the first engagement pin, and its operating cylinder 15 are attached to the bottom of the cargo box, and when the cargo box is at rest on the chassis, a horizontal second engagement pin 1 attached to the front of said chassis is engaged with said first engagement pin 8, and a second engagement pin 1 attached to the front of said chassis is engaged with said first engagement pin 8.
A second hook 17 which can rotate between a position where it hooks the first hook 9 and a position where it is released from the second engagement pin is pivoted on the bottom of the packing box, and a linkage between the first hook 9 and its operating cylinder and the second hook 17 are provided.
When the first hook hooks the first engagement pin, the second hook hooks the second engagement pin.
The device for fastening a cargo box of a garbage collection vehicle is characterized in that when the first hook is disengaged from the first engagement pin, the second hook is also disengaged from the second engagement pin. (2) The second hook 1 is attached to the bottom of the cargo box resting on the vehicle body.
7 is pivotally mounted above the second engagement pin 16 on the chassis side.