JPH0355503Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention relates to a locking device for a tail cab that does not generate any extra force on the latch when locking, and can lock the cab smoothly and completely.

[Conventional technology]

Cab-over vehicles such as trucks are designed to allow the cab to be tilted for engine maintenance and inspection.

When installing a power tail on a vehicle equipped with a floating member type cab suspension,
An auto-lock mechanism using hydraulic pressure is provided as a cab lock mechanism. As shown in FIG. 3, a cab striker 1 having a pin 1A is provided on the rear surface of the cab 2, and the striker 1 is provided on the side of the chassis 3.
Latch 4 that locks by holding pin 1A of
is provided on the cab mounting member 5 to perform cab locking.

FIG. 4 is a view of the R section in FIG. 3 in the direction of the X arrow, and this figure shows the shape of the cab lock lever 4A of the latch 4, and shows the state of engagement with the pin 1A of the striker 1. ing. The part indicated by the chain line is an autocab lock mechanism that uses hydraulic pressure, but since this part is not directly related to the present invention, its explanation will be omitted.

When the cab 2 descends from the tilted state, the pin 1A of the cab striker 1 descends together with the cab 2 while drawing an arc centered on the rotation axis 6 of the cab 2, as shown in FIG. It acts diagonally from above to below between the engagement start point A and the engagement end point B.

Therefore, as shown in FIG. 6, at the engagement end point B, the contact angle between the pin 1A and the latch 4 is a right angle, but at the engagement start point A, the contact angle between the pin 1A and the latch 4 is at right angles. It is tilted toward the front of the vehicle by α° with respect to the right angle. This angle α is the angle that the engagement start point A and the engagement end point B make with respect to the rotation shaft 6, and due to this operating angle α° and the engagement force w at this time, the rearward direction of the cab is F. A component force F is generated, and this component force F acts on the latch 4.

For this reason, the latch 4 is tilted to the rear of the cab 2 together with the cab mounting member 5;
The cartridge may stop midway and become incomplete.

[Purpose of invention]

The purpose of the present invention is to eliminate the problems of the conventional tailed cab locking device, and to provide an excellent tailed cab in which the latch does not receive force from the striker toward the rear of the cab during cab locking, and cab locking is always performed smoothly and completely. To provide a locking device.

[Structure of the idea]

A locking device for a tailed cab according to the present invention which achieves the above object has a striker pin protruding in the longitudinal direction of the chassis at the rear of the cab whose rear part is raised relative to the chassis using the front section as a fulcrum. is provided with a latch that receives and locks the striker pin from the side, and the striker pin contacts the latch during the period from the start of contact with the latch to the end of engagement during the locking operation. The surface is tapered with a narrower diameter on the cab side to reduce the force that causes the latch to tilt.

〔Example〕

Embodiments of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 shows an embodiment of a striker pin 11 for a car block in a striker 10 of the present invention.

In the present invention, when the striker pin 11 of the striker 10 protrudes from the rear surface of the cab 2, the pin 11 and the latch 4 slide on the latch 4 from the engagement start point A to just before the engagement end point B when the cab is locked. A tapered portion 12 is provided in the engaging section C. This tapered portion 12 has a diameter on the tip side of the pin 11.
The diameter D2 on the base side is thinner than D1 (D1>D2), and this taper angle is equal to the angle α° between the engagement start point A and the engagement end point B with the rotation axis 6. is becoming equal to. And the pin 11
The tip side following the taper part 12 is a large diameter part 13 with the diameter D1 as described above, and the base side following the taper part 12 is a narrow diameter part 14 with the diameter D2 as described above and is attached to the rear surface of the cab. ing.

In the tailed cab locking device of the present invention constructed as described above, as shown in FIG. 12 abuts the latch 4, so that the tapered portion 12, which has an inclination of angle α, abuts the latch 4 at right angles. Therefore, at this time, no force is applied to the latch 4 toward the rear of the vehicle, and the latch 4 and the cab mounting member 5 located below it do not tilt rearward.

Next, when the pin 11 and the latch 4 are at the midpoint T between the engagement start point A and the engagement end point B, the second
As shown in FIG. B, the angle β between the intermediate point T and the engagement end point B (horizontal line L) with the rotation axis 6 is smaller than the taper angle α°. Therefore, at this time, latch 4
and the tapered part 12 of the pin 11 are at a angle of (α-
It is tilted toward the front of the vehicle by β)°, and therefore a slight component force G is generated in front of the cab, but this component force G acts in the direction of cab locking, so it does not pose a problem.

Further, when the lock between the pin 11 and the latch 4 is completed and the pin 11 reaches the engagement end point B, the latch 4 passes through the tapered part 12 of the pin 11 and engages with the narrow diameter part 14 of the pin 11. Therefore, the contact angle between the pin 11 and the latch 4 becomes a right angle again, and the latch 4 no longer receives any component force from the pin 11 toward the front or rear of the vehicle.

As described above, in the locking device for the tailed cab of the present invention, when the pin 11 and the latch 4 are locked,
Since the latch 4 does not receive force from the pin 11 toward the rear of the vehicle, the latch 4 and the cab mounting member 5 located below it are prevented from falling toward the rear of the vehicle, and the cab lock is smoothly and completely mounted. It will be done.

[Effect of idea]

As described above, the tailed cab block device of the present invention has a striker pin protruding in the longitudinal direction of the chassis at the rear of the cab, which has its front section as a fulcrum and whose rear section is raised relative to the chassis.
A latch is provided on the chassis side that receives and locks the striker pin from the side. During the locking operation, the striker pin engages the latch during the period from the start of contact with the latch to the end of engagement. The contact surfaces are tapered with a smaller diameter on the cab side in order to reduce the force that causes the latch to tilt.

Therefore, when the striker pin, which moves from the top to the bottom with the cab, engages the latch waiting on the chassis, it slides with as little force as possible to tilt the latch toward the rear of the vehicle, so that the striker pin and The effect is that the engagement with the latch is smooth and complete.

[Brief explanation of the drawing]

Fig. 1 is a side view showing the shape of the cab lock pin of the locking device for a tail cab according to the present invention, and Figs. 2 A, B, and C show the state of engagement between the pin and latch shown in Fig. 1 from the starting point of engagement. 3 is a schematic side view of a vehicle in which a conventional striker pin is provided protruding from the rear of the cab, and a latch that engages with the pin is provided on the chassis side. Figure 4 is a view of the R section in Figure 3 in the direction of the X arrow, Figure 5 is an explanatory diagram showing the trajectory of the conventional striker pin from the tilted state to the locked state, and Figures 6A and B are the conventional striker pin and latch. FIG. 3 is an explanatory diagram showing an engagement state at an engagement start point and an engagement end point. DESCRIPTION OF SYMBOLS 1... Striker, 1A... Conventional striker pin, 2... Cap, 3... Shaft, 4... Latch, 6... Rotating shaft, 11... Striker pin of the present invention, 12... Taper portion.

Claims (1)

[Scope of utility model registration request] A striker pin is protruded in the longitudinal direction of the chassis at the rear of the cab, which uses the front section as a fulcrum and the rear section is raised relative to the chassis, and a latch is provided on the chassis side to receive and lock the striker pin from the side. The striker pin has a surface that contacts the latch during the locking operation from the start of contact with the latch to the end of engagement, in order to reduce the force that causes the latch to tilt. , A locking device for a tailed cab formed in a tapered shape with a narrower diameter on the cab side.