JPS587508B2 - Tail cab locking device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a locking device for a so-called tail cab in which a driver's cab (cab) provided on the chassis of an automobile can tilt forward, and embodiments thereof will be described below with reference to the drawings.

In the figure, reference numeral 1 denotes a hook, which in this example is supported on the cab side via a cushion rubber 2.

3 is a bracket supported on the chassis side, 4 is a lock operation bin, and 5 is a lock pin, and these two bins are kept at a constant distance from each other by a link 6.

In this example, the hook 1 is formed of a single plate, and has an arc-shaped guide groove 10 that allows the lock operation pin 4 to rotate within a certain range around the lock pin 5 when the lock pin 5 engages with the hook. It is formed.

The bracket 3 has two plates 30 and a spacer (
Each plate 3
0, a lock operation pin guide long hole 32 and a lock bin guide long hole 33 are inserted, respectively.

34 and 35 are reinforcing plates provided between each plate.

The lock operation pin 4 is fitted into the guide elongated hole 32, and the opening pin 5 is fitted into the guide elongated hole 33, so that their movements are guided.

The lock operating pin 4 is connected via a link lever 7 to a suitable lock operating device (lever) 8.

The lock operation pin guide elongated hole 32 is provided perpendicular to the tightening (unfastening) direction of the hook 1 (vertical direction in the figure), and is located at the dead point position of the lock operation pin 4 (the position indicated by line L in the figure). , the bottle 40 is bent in a straight line in the unlocking movement direction (left side in the figure), and the opposite side is bent in the tightening release direction of the hook 1 (in the upper side in the figure). ing.

The lock bin guide elongated hole 33 is arranged so that when the lock operation bin 4 is at the dead point position, the lock bin 5 engages with the hook 1 and the hook 1 is at the maximum tightening position (lowest position in the figure).
One end is defined so that the lock operation bin 4
Following the movement from the dead point position to the lock release position, the lock pin 5 moves from the same end in the direction of releasing the tightening of the hook 1, and moves to a position where the relative movement of the hook 1 with the bracket 3 is not obstructed ( The shape is configured so that when the hook 1 and the bracket 3 are separated when the cab is tilted, the pin 5 is in a position where it does not hit the hook 1.

Lock operation pin guide long hole 32 and guide groove 1 of hook 1
0 are positioned so that they overlap at the same position when the lock operation bin 4 is at the dead point position.

The widths of each of the guide slots 32 and 33 and the guide groove 10 are as follows:
The size is set to be suitable to allow movement of the bin 4 or 5.

FIG. 1 shows the state in which the lock has been completely released, and the locking operation ring 4 and locking pin 5 are located at the ends of the respective elongated guide holes 32 and 33.

The hook 1 is held in a predetermined position by a safety hook (not shown).

A state in which the lock operation pin 4 is partially moved in the locking direction (to the right in the figure) through the link handler 7 by operating the lock operation lever 8 is shown by the two-dot chain line in the figure.

In this example, the lock bin 5 moves along an L-curved guide elongated hole 33 and is guided to a position where it engages with the hook 1.

Further, when the locking pin 4 is moved in the locking direction along the guide elongated hole 32, the locking pin 5 is moved along the guide elongated hole 3.
3, press down on hook 1 and release cushion rubber 2.
is compressed, and the tightening between the cab and chassis begins.

FIG. 2 shows a state in which the lock operation pin 4 is at the dead point position, and the lock pin 5 is inserted into the guide elongated hole 33.
is pressed to the lowest position, and the hook 1 is tightened to the maximum.

The lock operation pin 4 is located above the tightening center L of the hook 1 (dead point position), and is fitted into both the guide elongated hole 32 and the guide groove 10 of the hook 1.

If the lock operation pin 4 is further moved in the lock direction beyond the dead point from this state, it will move in the direction of unfastening the hook 1 (upward in the figure) along the bent part of the elongated hole 32. is moved in the same direction by that amount, and the hook 1 is held in a state slightly returned from the maximum tightening position.

This is the lock completion state shown in FIG.

The unlocking operation is performed by the reverse operation to that described above, so a description thereof will be omitted.

In the above embodiment, the hook 1 is provided on the cab side, but the essence of the present invention does not change even if the hook 1 is provided on the chassis side.

The above-described cab block device may be installed at one location in the center of the rear of the cab, or at two locations on both sides of the cab and between the chassis, but the features of the present invention can be obtained in either case.

The effects of the present invention described above are as follows.

(1) Operations are performed by touch.

Simply operate the operating lever to engage the lock pin and hook.
Disengagement occurs automatically.

(2) High safety.

When locked, the lock operation bin and the lock bin completely lock relative movement in the vertical direction between the hook and the bracket, so that the lock is prevented from being released due to vertical displacement between the cab and the chassis.

In addition, with respect to lateral displacement, since the bending direction of the guide elongated hole 32 is formed so as to prevent the unlocking movement of the locking operation pin, this is also extremely difficult to dislodge.

(3) The operating force is light, and the operation is smooth and reliable.

Near the dead point where the maximum tightening force is obtained, the lock operation pin is operated in such a way that it is pulled almost perpendicularly with the lock pin as a fulcrum, so the lock operation force is light and each pin is inserted into its respective elongated guide hole. Since it is guided and moves reliably, reliable and smooth operation is performed.

(4) The overall structure is simple and the manufacturing cost is low.

(5) The tightening force can be easily adjusted due to assembly dimensional errors.

Adjustments can be made while in the locked state simply by turning the nut, and the work is particularly easy in this embodiment since the nut is located above the locking device.

[Brief explanation of drawings]

FIG. 1 is a vertical sectional view showing one embodiment of the present invention, FIGS. 2 and 3 are diagrams showing other operating states of FIG. 1 and are similar to FIG. 1, and FIG. is a bottom view of FIG. 3, and FIGS. 5 and 6 are side views of the components (shown in FIGS. 1 to 4) of the present invention (parts of FIG. 6 are omitted). . Explanation of symbols 1...Wack, 10...Guide groove, 2...Cushion rubber, 3...
...Bracket, 31...Color, 32...
... Lock operation pin guide long hole, 33 ... Lock bin guide long hole, 34, 35 ... Reinforcement plate,
4...Lock operation bin, 5...Lock pin, 6...Link, 1...Link lever, 8...Lock operation device ( lever), L.
...The tightening center of the hook (dead point position).

Claims (1)

[Claims] 1 Cushion rubber on one side of the cab or chassis 2
It consists of a hook 1 supported via a mating side m, a bracket 3 supported at a position corresponding to the mating side m, and a lock pin 5 and a lock operation pin 4 whose distance from each other is maintained constant. An arc-shaped guide groove 10 is formed so that when the lock pin 5 engages with the hook 1, the lock operation pin 4 can rotate within a certain range around the lock pin 5,
The bracket 3 is formed with a lock operation pin guide elongated hole 32 and a lock pin guide elongated hole 33 into which the lock operation pin 4 and the lock pin 5 connected to the lock operation device 8 are respectively fitted and guide their movements. The pin guide elongated hole 32 is provided perpendicularly to the tightening direction of the hook 1, and the pin guide elongated hole 32 is provided at right angles to the tightening direction of the hook 1.
The lock release direction side is straight, and the opposite side is the tightening of hook 1. The lock bin guide elongated hole 33 is configured to bend in the locking/unlocking direction, and when the locking bin 4 is at the dead point position, the lock bin 5 engages with the hook 1 and the hook 1 is at the maximum tightening position. Following the movement of the lock operation pin 4 from the dead point position to the lock release position, the lock pin 5 moves from the same end in the direction of releasing the tightening of the hook 1, and then Its shape is configured so that it is in a position that does not impede relative movement with the bracket 3, and when the lock operation pin 4 is at the dead point position, the lock operation pin guide elongated hole 32
This locking device for a tilt cab is characterized in that the guide grooves 10 of the hook 1 and the hook 1 are positioned so that they overlap at the same position.