JPH0331075A - Lock device of tilt cab - Google Patents

Abstract

PURPOSE:To form a tilt cab lockable even in the case of longitudinally moving a pin on the chassis side by arranging a hook, hooked to and unhooked from the pin in the chassis side, and a main latch, having a pin for locking the hook, on planes different from each other. CONSTITUTION:In the case of a cabover type truck, when a cabin, placed in a tilt (front tilt) condition, is returned to a horizontal condition, the cabin is automatically locked to a chassis. Here the lower end of a lock lever 5, connected by a pin 4 to the top end of an operating lever 3, and the upper end of a main latch 6, integrally formed with this lever 5, are parallelly connected through a hook lock pin 10. While a hook 7, freely hooked to and unhooked from a cab lock pin 2 additionally provided on the chassis side, lock lever 5 and the main latch 6 are respectively arranged on mutually different planes. The lock recessed part 16 of the hook 7 is engaged with the hook lock pin 10 with freedom of disengagement.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention automatically locks the cabin to the chassis in a cab-over type truck when the cabin is returned from a tilted state to a horizontal state. Regarding the tilt cab locking device.

[Conventional technology]

Conventionally, as a locking device for this type of tilt cab, the 9th locking device was used.
There is an invention disclosed in Japanese Patent Publication No. 61-4708 as shown in FIG. In other words, this locking device
Input lever 2 connected to and rod 3 attached to the chassis side
A lock cam 5 that acts on a hook 4 that can be freely engaged with the lock cam 5 is rotatably supported by a common pin shaft 6, and the pin of the lock cam 5 is inserted into the elongated hole 7 of the input lever 2 formed at a position apart from the pin shaft 6. A latch pawl 9 is provided rotatably by a pin shaft lO, and the input lever 2 is provided with a rod when the input lever 2 is moved from a waiting lock state to a lock state. 3 to release the latch claw 9, and when the operating rod 1 is moved in the locking direction in the unlocked state, the tail end 11 of the input lever 2 is provided with a movement sufficient to remove the latch claw 9. The position and size of the elongated hole 7 are selected as shown in FIG.

[Problem that the invention seeks to solve]

However, in the conventional example shown in Japanese Patent Publication No. 61-4708, the operation lever 1. Input lever 2. The lock cam 5 is constrained to be placed as close to the back of the cab as possible, and the hook 4 is placed on the same plane as the lock cam 5 and engages with it.
Since the lock cam 5 is configured to maintain the locked state, the position of the hook 4 is restricted by the lock cam 5, and the positions of the hook 4 and the rod 3 on the chassis side are also restricted.

On the other hand, the hook 4 is attached to the cab side, and the rod 3 is attached to the chassis side, and when the rod 3 is moved to a different position in the longitudinal direction of the vehicle due to the layout of the chassis side, etc., the rod 3. There are various problems in that the hook 4 and the lock cam 5 cannot be arranged on the same plane, resulting in an impossible-to-lock situation.

[Means for solving problems]

The present invention was made to solve the above-mentioned conventional problems, and includes a hook that can be freely engaged with and detached from a cab lock pin attached to the chassis side, and a hook lock pin that maintains the hook in a locked state. The purpose of this invention is to provide a locking device for a tilt cab that can cope with moving the cab lock pin in the longitudinal direction of the vehicle by arranging the main latch and the main latch on different planes. , an operating member in which a lock lever interlocked with the operating lever and a rotatably pivoted main launch are connected via a hook lock pin, and a hook that can freely engage with a cab lock pin mounted on the chassis side are arranged on different planes. The locking device for a tilt cab is configured to maintain a locked state by engaging a locking recessed portion of the hook with the hook locking pin.

〔Example〕

Hereinafter, the present invention will be explained in detail with reference to embodiments shown in FIGS. 1 to 8. In addition, FIG. 1 is a plan view showing the locking device for a tilt cab according to the present invention, FIG. 2 is a front view showing the internal structure of the locking device, and FIGS. 3 to 8 are explanatory views of the operation of the locking device. shows.

In the drawings, 1 is a case attached to the cabin (not shown), and 2 is a cab lock pin provided on the chassis (not shown) to lock the cabin.

Reference numeral 3 designates an operating lever, which includes a lock lever 5 connected to its tip by a pin 4, a main latch 6 integrated with the lock lever 5, a hook 7 that can be freely engaged with and detached from the cab lock bin 2, and the main A small latch 8 that restricts the action of the latch 6 and a small latch release lever 9 that releases the action of the small latch 8 are disposed within the case 1.

10 is a hook lock pin, and the lower end of the lock lever 5 and the upper end of the main rough tip are connected to the hook lock pin 1.
The lower end of the main latch 6 is rotatably connected to a support shaft 11 horizontally suspended at the front and rear of the case l.

Reference numeral 12 denotes a cam formed by bending the lower end extension of the main latch 6 to the left side, and a cam slope 12a is formed at the tip of the cam, and the lock lever 5 and the main latch 6 are
A clockwise rotational force is applied by a spring 13.

Reference numeral 14 denotes a support shaft extending rearward from the front plate 1a of the case 1, and the right end of the hook 7 is rotatably pivoted to the support shaft 14. In order upwardly, a hook recess 15 that can be freely engaged and detached from the cab lock bin 2, a lock recess 16 that can be freely engaged and detached from the hook lock pin 10, and a recess that can be freely engaged and detached from the support shaft 11 of the main latch 6. If a main latch stopper 18 is erected at the rear position of the relief recess 17 toward the front plate 1a of the case 1, the hook 7 can be supported. A spring 19 interposed in the shaft 14 biases it counterclockwise. The hook 7 is located between the lock lever 5 and the main latch 6, and the lock recess 16 of the hook 7 is arranged in a position where it can be freely engaged with and detached from the footer lock pin 10. That is,
The lock lever 5, main latch 6, and hook 7 are arranged on different planes.

Reference numeral 20 denotes a support shaft, and the small latch 8 is rotatably attached to the support shaft 20 at a position corresponding to the cam slope 12a of the main latch 6. The small latch 8 is rotated counterclockwise by a spring 21. energized. Further, the small latch release lever 9 is fixed integrally with the small latch 8 at a predetermined angle on the support shaft 20 of the small latch 8, and is operated by the tip 7a of the hook 7.

[Effect of the embodiment]

The operation of the embodiment described above will be explained below in the order of unlocking, waiting for locking, and locking.

(1) Unlock. To release the lock from the locked state shown in FIG. 1, pull the operating lever 3 to the left in the figure as shown in FIG. and rotates counterclockwise against the contraction force of the spring 13. As a result, the hook lock pin 10 separates from the lock recess 16 of the hook 7, so that the hook 7 is unlocked and becomes rotatable.

In addition, a small latch 8 is provided on the cam slope 12a of the main latch 6.
is engaged, and the backward movement (clockwise rotation) of the lock lever 5 and the main latch 6 is prevented.

As shown in FIG. 4, when the cab is tilted, the cab lock pin 2 is relatively lowered, so the hook 7 is pushed down by the cab lock pin 2 and the support shaft 14
Rotate counterclockwise using the fulcrum. When the hook 7 rotates counterclockwise, the small latch release lever 9 is pushed down by the tip 7a against the elastic force of the spring 21, so that the small latch 8 is released from the cam slope 12a of the main latch 6. break away.

(2) Waiting for lock. As described above, when the small latch 8 is released, the lock lever 5 and the main latch 6 move back to the position where the inner surface 6a hits the main latch stopper 18, as shown in FIG. The escape recess 17 of the hook 7 engages with the support shaft 11 of the main latch 6, and is in a locking state.

(3) When locked. First, as shown in Figure 6, the chassis
When the cab comes down to lock the hook 7, the hook 7 is pushed up by the relatively rising cab lock pin 2 and rotates clockwise.

At this time, since the small latch 8 is pressed down by the cam 12 of the main latch 6 and rotated clockwise, the tip 7a of the hook 7 can rotate without contacting the small latch release lever 9. Further, the shape of the inner surface 6a of the main latch 6 that is in contact with the main launch stopper 18 is such that the support shaft 1 of the hook 7
4 as a fulcrum, the main latch 6 does not move regardless of the rotation of the hook 7.

Next, as shown in FIG. 7, when the hook 7 is further rotated by the cab lock pin 2 and the main latch stopper 18 reaches the vicinity of the upper end of the inner surface 6a of the main latch 6, the upper edge 7b of the hook 7 It hits lock pin 10, so
The hook 7 rotates while slightly pushing back the main latch 6 (naturally, the lock lever 5 and the operating lever 3 are also set to -r).

However, it does not return to such a level that the small launch 8 is engaged with the cam slope 12a of the main latch 6.

Furthermore, as shown in FIG. 8, when the tip 7a of the rotating hook 7 climbs over the hook lock pin 1o, the restoring force of the spring 13 causes the operating lever 3 and the lock lever to
5 and the main rough chiro are pulled. Then, as shown in FIG. 1, when the cab lock pin 2 is in the normal position (the opening position), the hook recess 15 of the hook 7 is fitted into the cab lock pin 2, and the lock recess is formed. 16 is engaged with the hook lock pin 10, and the cab is locked.

〔Effect of the invention〕

As described above, the locking device according to the present invention includes an operating member in which a lock lever interlocked with an operating lever and a rotatably pivoted main latch are connected via a hook lock pin, and a casing attached to the chassis side. A hook that can be freely engaged with a block pin is arranged on a different plane, and the lock recess of the hook is engaged with the hook lock pin to maintain the locked state. When moving in the front-back direction, changing the position of the hook lock pin, for example by placing it 4 degrees behind the main latch, has the effect that the position of the hook can be easily changed.

[Brief explanation of drawings]

Fig. 1 is a plan view showing a locking device for a tilt cab according to the present invention, Fig. 2 is a front view showing the internal structure of the locking device, Figs. FIG. 9 is a front view showing a conventional tilt cab locking device, and FIG. 10 is a front view showing the internal structure of the locking device. 1 ・ 3 ・ 6 ・ 8 ・ I O ・ 2a l G ・ Tosopa.・Cab lock pin, 1st lock lever 7...Hook, ・Small launch release lever 12...Cam, ・Hook recess, ・Main latch case, 2. ・Operation lever 5. ・Main latch, ・Small latch, 9.・ ・Footer lock pin, ・・Cam slope, 15・ ・Lock recess, 18・ Figure 3 Figure 4 Figure 2 Figure 5 Figure 6 Figure 7 Figure 8 Figure 9 Figure 1O Figure

Claims (1)

[Claims] An operating member that connects a lock lever that is linked to an operating lever and a rotatably pivoted main latch via a hook lock pin, and a hook that can freely engage a cab block pin attached to the chassis side are placed on different planes. A locking device for a tilt cab, wherein the locking device is configured to hold the locked state by engaging the locking recess of the hook with the hook locking pin.