JPS6113419Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a cab lock device for a tail-cab automobile.

Some cab lock devices of this type include an eye bolt fixed to the frame and a jack attached to the cab, which are engaged and disengaged by a lock lever that is interlocked with the jack.

However, with conventional cab locking devices, the lock lever can be easily operated even when the cab is tilted, so if the lock lever is returned to the locked position when the cab is tilted, the jaw may not engage with the eye bolt when the cab is returned to its original position. At the very least, there is a risk that the vehicle will drive in that state, giving the illusion that the two are engaged. If you drive a car without locking the cab in this way, the vibrations that occur as you drive,
This is extremely dangerous because the cab is tilted due to inertia during bouncing or braking.

In addition, in order to avoid such a situation,
As described in Publication No. 53-91115, a handle stopper that interferes with the eye bolt (hook bolt) is provided, and the handle stopper engages and holds the jaw (lock plate) in the disengaged position. Proposed. However, in this case, the handle stopper should be replaced with a lock plate and an eye bolt (hook bolt).
Since it is necessary to accommodate both of these, space problems arise, and the degree of freedom in design is reduced, and depending on the shape of the handle stopper, there is a risk that the function of the locking mechanism will deteriorate. There is a problem.

This invention was made in view of the above, and
When the cab is tilted, that is, when the cab is lifted above the frame by a certain amount,
The purpose of the present invention is to prevent erroneous operation of the lever by locking the jaw in a position separated from the eye bolt and engaging and holding the lock lever in the release position, thereby increasing safety by preventing forgetting to lock the cab. .

The present invention will be described below with reference to an illustrated embodiment.

In the figure, reference numeral 1 denotes an eye bolt fixed to an eye bolt of a tail-cabin automobile, and a jaw 2 that engages and disengages from the eye bolt 1 is attached to the cab. The gear 2 is attached to the cab via a crank lever 3 and a bracket (not shown), and connects the crank lever 3 and the crank lever 3 via a rod 6 to a lock lever 5 which is pivotally attached to the end side of the cab (not shown) via a bracket 4. By pivoting and connecting the lock lever 5, the jaw 2 can be engaged with and disengaged from the eye bolt 1 by operating the lock lever 5 to raise and lower.

Further, a guide groove 7' is formed in the bracket 7 fixed to the cab, and a guide pin 8 that is engaged and guided by this guide groove 7' is fixed to the jaw 2, thereby controlling the rotation of the crank lever 3. The locus of movement of the jaw 2 in connection with the engagement and disengagement operation using the lock lever is regulated. A latch 10 that engages and disengages from an engagement pin 9 fixedly attached to the jaw 2 is pivotally attached to the bracket 7, so that the jaw 2 can be locked at a release position.

Here, the latch 10 is biased to rotate in the engagement direction by a spring 11, and by protruding from the frame a release member 12 that comes into contact with the latch 10, the distance between the cab and the frame is less than a predetermined value. If so, the release member 12 is the spring 11
The latch 10 is rotated against this force to release the engagement pin 9. The approach area in which the latch 10 is released is, for example, the area where the safety lever 13 engages with the safety hook 14. 15 and 16 are stoppers of the latch 10.

In the above configuration, when the cab is locked, the safety lever 1
3 is engaged with the safety hook 14, and the jaw 2 is engaged with the eye bolt 1. At this time, since the latch 10 is pushed up against the spring 11 by the release member 12, the latch 10 releases the engagement pin 9.

When the lock lever 5 is rotated from the fixed position to the released position, the crank lever 3 is rotated through the lock 6.
is rotated clockwise. Then, due to the rotation of the crank lever 3 and the guiding action of the guide groove 7', the jaw 2 moves downward and to the right as shown in FIG. 4, and reaches the release end. In this state, when the safety lever 13 is released and the cab is tilted, the latch 10, which had been pushed up by the release member 12, rotates downward relative to the fifth latch.
It engages with the engagement pin 9 as shown in the figure. For this purpose, the jaw 2 is locked in the disengaged position, and the lock lever 5 is engaged and held in the disengaged position.

When returning the tilted cab, the safety lever 13 approaches the safety hook 14 and the jaw 2 approaches the eye bolt 1 as shown in FIG. Then, as shown in FIG. 7, the safety lever 14 and the safety lever 1 are
3 are about to engage, the latch 10 hits the release member 12 and begins to release the latch 10.

If you continue to lower the cab in this way,
As soon as the safety is fully engaged as shown in FIG. 8, the latch 10 is lifted sufficiently to completely release the engagement pin 9. Therefore, if the lock lever 5 is rotated back from the release position to the fixed position in this state, the rotation of the crank lever 3 and the guiding action of the guide groove 7' will cause the jaw 2 to move as shown in FIG. Reliably engages with the eye bolt 1.

That is, according to the present invention, the lock lever can be operated only in the engagement/disengagement area of the jowl, and when the joist is tilted, the lock lever is engaged and held at the release position, and the joey is locked at the disengaged position. This prevents incorrect operation of the lock lever. Therefore, forgetting to lock the cab due to erroneous operation of the lock lever can be prevented.

Furthermore, since the jowl is securely locked in the disengaged position during tailing, there is no risk of the jowl colliding with the eye bolt when the cab is returned. Furthermore, since the moving locus of the jaw is regulated by the guide groove, the jaw and latch can always be reliably engaged and disengaged at a fixed position. Therefore, the safety and reliability of the erroneous operation prevention function can be improved.

Furthermore, with the present invention, the latch that locks the jaw in the disengaged position can be attached to a part unrelated to the eye bolt, which increases the degree of freedom in design and prevents the functional deterioration of the locking mechanism due to the addition of the latch. It can also be prevented.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention,
FIG. 1 is a schematic front view of the entire cablock device;
FIG. 2 is a front view of the main parts of the same as above, and FIGS. 3 to 8 are front views of the main parts showing the operation process of the same. 1... Eye bolt, 2... Jiyo, 5... Lock lever, 6... Rod, 7... Bracket,
7'... Guide groove, 8... Guide pin, 9... Engagement pin, 10... Latch, 12... Release member.

Claims (1)

[Scope of utility model registration request] In a tail-cabin automobile, in which an eye bolt fixed to the frame and a jyo attached to the cab are engaged and disengaged by a lock lever linked to the jyo, the jyo slides into contact with a pin fixed to the jyo to control the trajectory of the engagement and disengagement of the jyo. a bracket fixed to the cab to form a regulating guide groove; a latch pivotally connected to the cab so as to engage the jaw in a disengaged position; A release member fixed to the frame is provided so as to contact the latch and rotate the latch in a direction to remove the latch from the jyo, and when the cab is tilted up from the frame by more than a predetermined value, the latch engages the jyo in the release position. A cab lock device for a tail cab automobile, characterized in that the cab lock device is configured to engage and hold the lock lever in an open position.