JPH0528153Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Field of Application) The present invention relates to a device for locking the cab of a cab truck.

(Prior art) A cab truck has a tilt device that raises and lowers the cab, which is pivotally supported on a chassis frame, while tilting it around a support shaft (Utility Model Application No. 60-75180, No. 63).
−100378, etc.)

(Technical Problem) However, the conventional tilt device only raises and lowers the cab, and there is a problem in that a separate locking operation must be performed in order to lock the cab in a state where the cab is not tilted and can be driven.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems and to provide a cab lock device for a cab truck that operates in conjunction with the raising and lowering of the cab.

(Technical Means) The purpose is to connect a telescoping rod 5 of a lift cylinder 4 provided on the chassis side to a lift arm 3 that raises and lowers a cab 2 that is pivotally supported on a chassis frame 1, and to control the expansion and contraction of the telescoping rod. A related interlocking member 6 that reciprocates is pivotally supported on the lift arm side, and a latch 8 is attached to the lift arm side to engage and disengage a locking member 7 installed on the cab side by interlocking with the interlocking member. achieved by.

(Example) This will be explained with reference to the drawings.

The illustrated cab truck has a so-called double cab type cab 2 mounted on a chassis frame 1, which also covers the engine, transmission, etc., and the rear part of the cab 2 flips up around a support shaft 9 at the lower front part. It is pivoted so that it can be raised and lowered.

The cab 2 has a guide rail 10 in the front-back direction at the rear of the lower surface, and the lift arm 3 has a roller 11 at the front end that contacts the rail 10 from below.The roller 11 moves from the front to the rear along the guide rail 10. The rear end of the arm is pivotally supported by the chassis frame 1 so that the rear end of the cab can be raised to a required height. A telescoping rod 5 of a lift cylinder 4, which is a driving source, is arranged between the roller 11 and the shaft fulcrum 12, and the telescoping rod 5
Since the tip is connected to the lift arm 3 via the shackle 13, the cab 2 can be raised or lowered by operating the cylinder. Reference numeral 14 indicates a pivot point between the lift arm 3 and the shaft 13.

An interlocking member 6 disposed parallel to the lift arm 3 is pivotally supported at the tip of the telescoping rod 5, and the interlocking member 6
is swingably mounted on the side of the lift arm 3 via a support shaft 15. The other end of the interlocking member 6 is connected to a latch 8 attached to the lift arm near the other end.
As a result, the latch 8 is configured to reciprocate within a certain range in response to the operation of the telescoping rod 4. Reference numeral 16 indicates an interlocking pin provided at the other end of the interlocking member 6, and 17 indicates an elongated hole formed in the latch 8 for engaging the pin 16.

The locking member 7 is installed at a position on the cab 2 such that the latch 8 engages in the engagement recess 18 when the telescoping rod 5 moves forward, and disengages during the forward movement. Reference numeral 19 is a support shaft that holds the latch 8. Thus, Latch 8
is set so that it is locked with a slight stroke after the lift cylinder 4 moves back and the cab 2 substantially completes its descent. 20 is a rubber bushing provided on the chassis frame so as to be in contact with a member 21 on the cab 2 side in the locked state; 22 is a support member that supports the cab 2 in the flipped up state; and 23 is a receiving portion on the cab side that receives the member 22. shows.

(Function) In the above-described configuration, when the lift cylinder 4 is activated and the telescoping rod 5 starts to extend from the state where the cab 2 is lowered (forward movement), the interlocking member 6 connected to the telescoping rod 5 at its tip swings. The latch 8, which is interlocked with the member 6, rotates in the direction out of engagement with the locking member 7.

After the engagement is completely disengaged, the lift arm 3 rises, and the cab 2, via the roller 11 at its tip, rises so as to flip up its rear part. When the cab 2 is lowered (backward movement), the interlocking member 6 that connects at the final stage when the cab is lowered onto the frame rotates in the opposite direction, so the latch 8 moves toward the locking member 7 in the direction of engagement. It rotates and locks.

(Effects) Therefore, according to the present invention, it operates in conjunction with the raising and lowering of the cab 2, and can be automatically locked on the chassis frame 1 side when the cab is lowered, so that the locking operation does not take much effort. but also
Not only does the locking operation not take much time, but it also has the effect of significantly increasing safety.

[Brief explanation of the drawing]

The drawings show an embodiment of the cab lock device according to the present invention, and FIG. 1 is a side view, FIG. 2 is a plan view of the main part, FIG. 3 is a sectional view seen from the right side of FIG.
The figure is a side view from when the cab is locked to the unlocked condition, and FIG. 5 is a side view when the cab is tilted. 1... Palm frame, 2... Cab, 3...
Lift arm, 4...Lift cylinder, 5...
Telescopic rod, 6... Interlocking member, 7... Locking member, 8
...Ratsuchi.

Claims (1)

[Scope of utility model registration request] A telescoping rod 5 of a lift cylinder 4 provided on the chassis side is connected to a lift arm 3 that lifts and lowers a cab 2 that is pivotally supported on the chassis frame 1, and an interlocking member 6 that reciprocates in relation to the expansion and contraction of the telescoping rod. A cab lock device for a cab truck, characterized in that a latch 8 is attached to the lift arm side, which is pivotally supported on the lift arm side, and which engages and disengages from a lock member 7 installed on the cab side by interlocking with an interlocking member.