JPS5918944Y2 - Tail cab car cab lock device - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a cab lock device that can easily, safely and securely lock or unlock the cab of a tilt cab automobile.

It is well known that tilt cab automobiles are required to be able to lock the cab safely and reliably, and to be able to perform locking and unlocking operations easily.

The present invention has been developed in view of the above circumstances, and uses a simple mechanism to automatically and continuously engage and release the hook provided on the cab side and the catch pin provided on the frame side. This provides a cab lock installation that allows for easy installation.

In the figure, a pair of left and right brackets 3 are fixed to the lower rear end of a cab 2, which is pivotally connected to the front end of a frame 1 of a tilt cab automobile via a cab hinge (not shown) so that the lower front end can tilt forward.

A cam plate 5 is pivotally attached to this bracket 3 so as to be rotatable left and right about a support shaft 4 extending in the front-rear direction, and a support shaft 6 extending in the front-rear direction is provided at an upper eccentric position of the cam plate 5. The upper ends of the hooks 7 are rotatably connected to the support shafts 6, respectively.

An engaging member 8 is provided at the inner lower part of the cam plate 5.
At the same time, an engaging pin 9 is provided on the outer side of the hook 7, which faces the engaging member 8 with the support shaft 4 in between.
is set so that the engaging member 8 collides with the engaging pin 9 to lift and rotate the hook 7 only when the cam plate 5 is rotated by a predetermined angle or more.

Further, the left and right hooks 7 and the cam plate 5 are arranged in opposite directions, and the cam plate 5 is connected to the cam plate 5 via the support shaft 4.
One cam plate 5 and the other cam plate 5 are simultaneously rotated in opposite directions by linking reversing levers 10 fixed to each other via a link 11 having a telescopic adjustment function.

One end of the lock lever 13 is pivotally connected to one end of the one reversing lever 10 configured to be interlocked in this manner through a link 12, and the reversing lever 10 can be rotationally controlled by this lock lever 13 through the link 12. That's how it is.

On the other hand, an arch-shaped bracket 1 provided on the frame 1
A catch pin 16 is attached to the cab 4 via an elastic member 15 typified by rubber or the like, and the hook 7 is engaged with and detached from the catch pin 16 to lock the cab 2 to the frame 1 or to release the lock. be.

In the cab lock device having such a configuration, the lock lever 1
3 to the left in FIG. 7, the link 12 is pulled to the left, so that one reversing lever 10 connected to the link 12 rotates clockwise about the support shaft 4.

The other reversing lever 10, which is interlocked with this reversing lever 10 via a link 11, rotates counterclockwise around a spindle 4, and a cam fixed to each lever 10 via the spindle 4 The plates 5 are each rotated inward.

Then, the engaging member 8 and the engaging pin 9, which had been maintained at a predetermined distance as shown in FIG. 2, gradually approach each other as shown in FIG. After the collision, as the rotation of the cam plate 5 progresses, the engagement member 8 pushes up the engagement pin 9 as shown in FIG. leave.

At this time, if the center of rotation of the cam plate 5 is O, the center of the catch pin 16 is A, the pivot point of the hook 7 is B, and the pivot point B' of the hook 7 in the middle of movement is taken, then the relationship between these is as follows. As is clear from the operation diagram shown in FIG. 6, A, 0. If point B is placed on a straight line, 0B=OB'AB=AO+0B=AO+OB'>AB'.

That is, as the cam plate 5 rotates, the support shaft 6 of the hook 7 moves toward the catch pin 16 around the support shaft 4, so the hook 7 as a whole moves downward and the connection with the catch pin 16 is caused. Gradually loosen the degree of bondage.

When the cam plate 5 is rotated to a position where the rotation locus of the tip of the hook 7 passes below the catch pin 16, the engagement member 8 of the cam plate 5 collides with the engagement pin 9 of the hook 7.

Therefore, when the cam plate 5 is rotated beyond a predetermined angle, the hook 7 is lifted and rotated while still descending, and is completely removed from the catch pin 16.

When locking the cab, the lock lever 13 is gradually returned to move the cam plate 5 to move the hook 7 toward the catch pin 16.

When the tip of the hook 7 is completely inserted into the catch pin 16, the engaging member 8 of the cam plate 5 is disengaged from the engaging pin 9 of the hook 7.

Then, when the cam plate 5 is rotated back again, the support shaft 6
As the hook 7 gradually moves upward, the hook 7 rises and is pressed into contact with the catch pin 16 from below, resulting in a cab-locked state.

At this time, if the elastic member 15 is interposed between the bracket 14 on the frame 1 side and the catch pin 16 as in the embodiment, manufacturing errors or assembly errors of the cam plate 5, hook 7, catch pin 16, etc. This is advantageous because the elastic member 15 can absorb vibrations that are about to be transmitted between the frame 1 and the cab 2.

Although omitted in the example, frame 1 and cab 2
It will be explained in detail that by interposing a flip-up prevention mechanism between the hook 7 and the hook 7, the cab 2 can be prevented from accidentally flipping up even after the hook 7 is removed from the lock pin 16, thereby increasing safety. Not even.

As described above, the cab lock device according to the present invention has an extremely simple structure in which the cam plate is interposed between the cab and the hook that engages and disengages with the catch pin provided on the frame side, but the cam plate rotates. Accordingly, the hook can be automatically engaged and disengaged and tightened/released in succession, so that the cab lock and lock release operations can be performed easily.

Furthermore, the retaining member and the engaging pin collide immediately before tightening and immediately after releasing the tightening, and the hook and catch pin remain in a temporary engaged state until the hook is lifted and rotated. The safety and reliability of the cab lock can be improved since the cab and frame will not be completely separated due to inadvertent jumping up or slight movement of the lock lever.

[Brief explanation of the drawing]

Figure 1 is a rear view of the cab illustrating the assembled state of one embodiment of the present invention, Figure 2 is a front view of the main parts of the present invention, Figure 3 is a side view of Figure 2, and Figure 4 is FIG. 5 is a front view showing a state in the middle of unlocking, FIG. 5 is a front view showing an unlocked state, FIG. 6 is an explanatory diagram of operation, and FIG. 7 is a front view of one embodiment. 1... Frame, 2... Cab, 3... Bracket on the cab side, 4... Support shaft, 5... Cam plate,
6... Support shaft, 7... Hook, 8... Retaining member, 9
...Main pin, 14...Bracket on the frame side,
15...Elastic part O, 16...Catch pin.

Claims (2)

[Scope of utility model registration request] (1) The upper end of the hook is rotatably attached to the upper eccentric position of the cam plate, which is pivotally supported by the bracket on the cab side, about an axis parallel to the cam plate, and the cam plate is rotated toward the opening of the hook. A tilt cab automobile characterized in that a retaining member is provided on the cam plate to lift and rotate the hook when the hook is rotated by a predetermined angle or more, and a catch pin that engages and disengages from the hook is attached to a bracket on the frame side. cab lock device. (2) The cab lock device for a tilt cab automobile according to claim 1, wherein the catch pin is attached to a bracket on the frame side via an elastic member.