JPS6333745Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a stay device for supporting a cab in a tilted position in a tilted cab vehicle.

In a tilted cab vehicle, the front lower end of the cab is rotatably supported on the chassis frame, and a stay device is installed between the rear lower end of the cab and the chassis frame to hold the cab in an inclined position. is provided.

That is, in conventional tilt cabs, a torsion member is provided on the shaft support at the front of the cab to bias the cab in the tilting direction. Reinforcement was required at the mounting part, making the structure complex and increasing costs. Also,
The stay device rotatably connects the ends of a plurality of support rods to each other, and each connecting portion is provided with a locking member. However, when a conventional tailed cab is tilted, the rear part of the cab is assisted by the biasing force of the torsion member, and thereby the connecting portion is secured by each locking member of the stay device that is extended in a straight line. lock,
The cab was supported by a straight stay device. Furthermore, when lowering the cab to a horizontal position, the locks by each locking member are released and the stay device is folded, and when the cab is tilted, each locking member is locked and released each time.

Therefore, the present invention provides a stay device for a tail cab vehicle that can be tilted with a small spring force, requires a small installation space and is low in cost, and that can extremely easily lock and release each pipe when the tail cab is tilted. The purpose is to

That is, the stay device of the present invention is composed of a telescopic multi-stage pipe, and a spring that biases the tail cab in the tilting direction is housed in the pipe. The fitting portion of each pipe is provided with a locking piece that projects inward of the pipe and can be retracted outward, and each locking piece is biased in the projecting direction by a spring. When the multistage pipe is extended, each lock piece supports the pipe directly above it, and when the uppermost lock piece is pulled to release support for the uppermost pipe, the lower lock pieces sequentially move as the pipe descends. There is a structure to be released.

Hereinafter, details of the present invention will be explained with reference to illustrated embodiments.

In the tailed cab vehicle shown in FIG. 1, the cab 1 has a chassis frame 2 at its front lower end.
It is pivotally supported and can be tilted forward. The cab 1 is tilted and held in the tilted position by a multistage pipe stay device A provided between the chassis frame 2 and the rear lower end of the cab 1.

As shown in FIG. 2, the device A consists of an upper pipe 3, a middle pipe 4, and a lower pipe 5 whose diameters gradually increase, and the lower end of the upper pipe 3 is connected to the middle pipe 4.
At the upper end, the lower end of the middle pipe 4 is slidably inserted into the upper end of the lower pipe 5, so that the whole pipe is expandable and retractable. A bracket 6 is fixed to the lower end of the lower pipe 5, and the bracket 6 is rotatably attached to a fixed bracket 21 provided on a cylindrical support member 20 projecting outward from the side surface of the chassis frame 2. It is pivoted. On the other hand, a bracket 7 is fixed to the upper end of the upper pipe 3, and the bracket 7 is rotatably pivoted to a bracket 8 fixed to a back frame 10 of the cab to support the cab. A coil spring 11 is provided within the multistage pipe over its entire length.

Lock devices 12 and 13 are provided at the upper ends of the middle pipe 4 and the lower pipe 5, respectively. As shown in FIGS. 3 and 6, in the lock device, a first bracket 12a having a U-shaped cross section is fixed to the upper outer surface of the middle pipe 4, and a second bracket 12b is further attached to the outer surface of the first bracket 12a. A lock piece 12c is inserted through the brackets 12a, 12b and the middle pipe 4. Inside the second bracket 12b is a lock piece 12.
A coil spring 12d is provided around c to urge the lock piece 12c to protrude into the pipe 4. The upper surface of the locking piece 12c is flat, and when the multistage pipe shown in FIG.
It is designed to receive the lower end surface of. The inner end portion forms a claw 12f whose lower surface is an inclined surface 12j rising toward the tip. Note that a handle 12e is attached to the outer end of the lock piece 12c.

Like the locking device 12, the locking device 13 also has a first locking device.
and second brackets 13a, 13b, lock piece 13c, and coil spring 13d. However, in the locking device 13, the claw 13f at the inner end has sloped surfaces 13h and 13j as well as the upper and lower surfaces.

Next, the operation of this device will be explained.

First, the cab 1, which is inclined as shown by the two-dot chain line in FIG. 1, is supported by the stay device A in an extended state. At this time, in the apparatus A, as shown in FIG. 3, the middle pipe 4 is supported by the lock piece 13c of the lock device 13, and the upper pipe is supported by the lock piece 12c of the lock device 12.

Next, when lowering the cab 1 to make it horizontal as shown by the solid line in FIG. 1, the handle 12e of the locking device 12 is operated to pull the locking piece 12c outward against the spring 12d. As a result, the engagement between the lock piece 12c and the lower end of the upper pipe 3 is released, as shown in FIG.
The load of the cab 1 that resists the movement causes it to descend inside the middle pipe 4. When the lower end of the upper pipe 3 reaches the locking device 13 provided on the lower pipe 5, the lower end of the upper pipe 3 abuts the tip of the upper inclined surface 13f of the claw 13f of the locking piece 13c, thereby pushing the locking piece 13c outward. push away. At this time, due to the withdrawal of the lock piece 13c, the lower end of the middle pipe 4 is relatively moved onto the upper inclined surface 13f of the claw 13f of the lock piece 13c.
Then, the middle pipe 4 pushes the lock piece 13c further outward. The upper pipe 3 and the middle pipe 4 both descend within the lower pipe 5, and finally the cab 1 is held in a horizontal position with the upper pipe 3, the middle pipe 4, and the lower pipe 5 overlapping each other.

In this way, the multi-stage pipe stay device is automatically shortened by the load of the cab 1 by simply pulling the lock piece 12c of the lock device 12 at the top.

Next, when the cab 1 is to be tilted, when the rear end of the cab 1 is lifted by the force of the spring 11, the upper pipe 3 and the middle pipe 4 move upward. When the lower ends of these pass through the lock device 13, the lock piece 13c projects inwardly into the lower pipe 5 by the spring 13d and supports the middle pipe 5. When the upper pipe 3 further rises and its lower end passes the lock device 12, the lock piece 12c of the lock device 12 projects into the middle pipe 4 by the spring 12d and supports the lower end of the upper pipe 3. In this state, the cab 1 is held in an inclined position.

As explained above, according to the multistage pipe stay device of the present invention, especially its lock device, when the tail cab is supported in an inclined position, simply releasing one lock device automatically releases the other lock devices. This allows the stay device to be shortened and the cab to be in a horizontal position. Furthermore, when tilting the tail cab, the stay device can be extended without operating the locking device, and each pipe is automatically locked in the extended state. Further, since a spring for biasing the tilting of the cab is provided within the multi-stage pipe, there is no need to provide a tilting biasing means on the shaft support at the front end of the cab.

As described above, the stay device of the present invention has a simple structure, requires a small installation space, is inexpensive, and can easily tilt the tail cab and support it in an inclined position.

[Brief explanation of drawings]

The figures show one embodiment of the present invention, in which Fig. 1 is a side view of a tail cab having a stay device of the present invention, Fig. 2 is a diagram showing the installation structure of the stay device,
Figure 3 is a partially sectional side view of the stay device when it is extended;
Figure 4 is a partially sectional side view of the stay device when it is shortened;
5 is a view taken along the V arrow in FIG. 3, and FIG. 6 is a sectional view taken along the line -- in FIG. 3. 1... Tail cab, 2... Chassis frame, 3, 4, 5... Pipe, 12, 13... Lock device, 12c, 13c... Lock piece, 11, 1
2d, 13d... Spring.

Claims (1)

[Scope of utility model registration request] In a tail-cabin vehicle where the front lower end of the cab is pivoted to the chassis frame and can be tilted forward, the upper end of a multi-stage pipe in which multiple pipes with different diameters are telescopically inserted is attached to the rear lower end of the cab. At the same time, the lower end of the multi-stage pipe is pivoted and supported by the chassis frame, and a coil spring is housed in the multi-stage pipe along the longitudinal direction so that the spring biases the rear part of the cab in the lifting direction. A lock piece is provided at the upper end of each of the outer pipes, except for the top pipe, which can be moved in and out from the outside into the pipe and is biased by a spring to protrude into the pipe. A flat surface is formed on the upper surface of one piece to support the lower end of the pipe directly above it, and the lower end of the pipe higher than the pipe directly above is formed on the upper surface of the inner end of each lock piece except the top lock piece. A stay device for a tail-cabin vehicle, characterized in that it is provided with an inclined surface for sliding in contact and retracting the lock piece outward.