JP2700220B2 - Latch device for sliding door - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a latch device used for a sliding door of a refrigerated container mounted on a refrigerator car.

[0002]

2. Description of the Related Art Various types of latch devices for a sliding door of a cold storage container have already been proposed.

[0003] However, there has not yet been proposed any structure capable of suppressing vibration of the slide door accompanying vibration during running of the cold storage vehicle and withstanding a high load applied to the latch device.

[0004]

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a latch device which has a simplified structure, is easy to operate, can accurately suppress the vibration of a sliding door, and can withstand a high load. It is.

[0005]

The cash bag lock device according to the present invention will now be described with reference to the reference numerals in the accompanying drawings. The case 26 provided with the grooves 19 and 20 is fixed to the slide door. The receiving grooves 4 and 5 are provided at the distal ends of the lock levers 2 and 3, the half lock projections 8 and 9 and the full lock projections 6 and 7 are provided adjacent to the base end, and the intermediate part of the lock levers 2 and 3 is pivoted. 10 and 11, the front and rear plates 15 of the case 26,
It is pivotally attached to 16.

[0006] At the base end of the keeper lever 12, there are provided stopping projections 13, 14 which are engaged with and disengaged from the half lock projections 8, 9 or the full lock projections 6, 7.・ Rear plates 15, 16
Pivotably attached to the The lock levers 2 and 3 and the keeper lever 12 are moved by the springs 21, 22 and 23, and the half lock projections 8 and 9 or the full lock projections 6 and 7 of the lock levers 2 and 3 and the stop projections 13 and 14 of the keeper lever 12.
The rotation urging is performed in a direction for maintaining the engagement.

A drive projection 18 is provided at the base end of the reset lever 17 so as to abut the tip of the keeper lever 12, and an intermediate portion of the reset lever 17 is pivotally connected to a front plate 15 of a case 26 by a pivot 24.

[0008]

[Function] To open the sliding door, reset lever 1
7 is rotated in a predetermined direction.
8, the keeper lever 12 is rotated against the spring 23. Then, the engagement between the stopper projections 13 and 14 and the full lock projections 6 and 7 is released, and the lock levers 2 and 3 are rotated by the biases of the springs 21 and 22 to be unlocked.

When the slide door is closed, when the door is closed, first, the bearing rod 1 and the grooves 19, 20 of the lock levers 2, 3 are formed.
Abuts. As the springs 21 and 22 are further closed, the stopper projections 13 and 14 of the keeper lever 12 engage with the half-lock projections 8 and 9 to enter a half-lock state.
When the closing is continued further against the springs 21 and 22, the receiving rod 1 and the receiving grooves 4 and 5 of the lock levers 2 and 3 are engaged and locked, and the stopper projections 13 and 14 of the keeper lever 12 and the full lock projection are engaged. 6 and 7 are engaged, and the locked state is maintained.

[0010]

In the illustrated embodiment, both ends of pivots 21, 22, 23 fixed to the front and rear plates 15, 16 of the case 26 and a pivot 24 pivotally mounted to the front plate 15 are swaged and removed. Has been blocked.

Lock levers 2 and 3 and keeper lever 12
Are formed by torsion springs whose coil portions are fitted to the pivots 10, 11, 25, respectively.
The lock levers are mounted on the front surfaces of the lock levers 2 and 3 and the keeper lever 12. In FIG. 1, a spring 21 urges the lock lever 2 to rotate clockwise, and a spring 22
Is urged to rotate counterclockwise, and the spring 23 urges the keeper lever 12 to rotate clockwise.

The receiving grooves 4 and 5 of the lock levers 2 and 3 each have a semicircular shape substantially corresponding to the diameter of the receiving rod 1, and the circle formed by the receiving grooves 4 and 5 in the full lock state is the receiving rod 1. It almost corresponds to the diameter of

[0013]

As described above, in the sliding door latch device of the present invention, in the locked state, the metal receiving rod 1 is engaged with the receiving grooves 4 and 5 of the two lock levers 2 and 3, so that the slide is performed. The vertical and horizontal movement of the door is accurately suppressed, and the sliding door does not rattle due to vibration and shock during traveling of a cold storage vehicle or the like, and can withstand a high load.

[Brief description of the drawings]

FIG. 1 is a front view of a slide door latch device according to an embodiment of the present invention.

FIG. 2 is a right side view of the latch device.

FIG. 3 is a front view of a receiving rod.

FIG. 4 is a bottom view of the receiving rod.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Receiving rod 2 Lock lever 3 Lock lever 4 Receiving groove 5 Receiving groove 6 Full lock projection 7 Full lock projection 8 Half lock projection 9 Half lock projection 10 Axis 11 Axis 12 Keeper lever 13 Suppression projection 14 Suppression projection 15 Front plate 16 Rear plate 17 Reset lever 18 Drive projection 19 Groove 20 Groove 21 Spring 22 Spring 23 Spring 24 Axis 25 Axis 26 Case

Claims (1)

(57) [Claims] 1. A receiving rod 1 fixed to a fixed frame 27;
Groove 1 fixed to slide door 28 and receiving rod 1
A case 26 provided with 9 and 20; receiving grooves 4 and 5 provided at the distal end, half-lock projections 8 and 9 and full-lock projections 6 and 7 provided adjacent to the base end, and a pivot 10 Lock levers 2 and 3 pivotally attached to a case 26 by 11; half-lock projections 8 and 9 or stop projections 13 and 14 that engage and disengage with full-lock projections 6 and 7 are provided at a base end portion, and an intermediate portion is a pivot 25 Keeper lever 1 pivotally attached to case 26 by
2; springs 21 and 22 for rotating and biasing in a direction of maintaining engagement between half lock projections 8 and 9 or full lock projections 6 and 7 of lock levers 2 and 3 and restraint projections 13 and 14 of keeper lever 12; A latching device for a sliding door, comprising: a driving projection 18 in contact with the distal end of the keeper lever 12 at the base end; and a reset lever 17 pivotally connected to a case 26 by a pivot 24 at an intermediate portion.