JPH08319745A - Latch device for sliding door - Google Patents

Abstract

PURPOSE: To endure a high load by simplifying operation with a simplified structure, and precisely restraining vibration of a sliding door. CONSTITUTION: Receiving grooves 4 and 5 to be locked on and released from a bracket metal bar 1 are arranged in a tip part, and lock levers 2 and 3 where half lock projections 8 and 9 and full lock projections 6 and 7 are arranged in a base end part, are pivotally fixed to a case 26 by pivots 10 and 11. A key lever 12 where restraining projections 13 and 14 to be locked on and released from the half lock projections 8 and 9 or the full lock projections 6 and 7 are arranged in the base end part, is pivotally fixed to the case 26 by a pivot 25. It is rotationally energized by springs 21, 22 and 23 in the direction for maintaining engagement between the half lock projections 8 and 9 or the full lock projections 6 and 7 and the restraining projections 13 and 14. A reset lever 17 where a driving projection coming into contact with a tip part of the key lever 12 is arranged in the base end part, is pivotally fixed to the case 26 by a pivot 24.

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 refrigerating container mounted on a refrigerated vehicle.

[0002]

2. Description of the Related Art As a latch device for a sliding door of a cold storage vehicle container, various structures have already been proposed.

However, there has not yet been proposed a structure that can suppress the vibration of the slide door that accompanies the vibration of the cold-insulated vehicle during traveling and can withstand the high load applied to the latch device.

[0004]

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

[0005]

In the following, with reference to the reference numerals in the accompanying drawings, in the cash bag lock device of the present invention, the receiving rod 1 is fixed to the fixed frame body and the receiving rod 1 moves in and out. The case 26 having the grooves 19 and 20 is fixed to the sliding door. The lock levers 2 and 3 are provided with receiving grooves 4 and 5 at the tips thereof, and the base ends thereof are provided with the half lock projections 8 and 9 and the full lock projections 6 and 7 adjacent to each other, and the intermediate portions of the lock levers 2 and 3 are pivoted. 10, 11, front and rear face plates 15 of the case 26,
16 is rotatably pivoted.

At the base end of the keeper lever 12, there are provided stop protrusions 13 and 14 for engaging and disengaging with the half lock protrusions 8 and 9 or the full lock protrusions 6 and 7, and the intermediate portion of the keeper lever 12 is pivoted to the front of the case 26 by a pivot 25. .Rear plates 15, 16
Rotatably pivoted to. The lock levers 2 and 3 and the keeper lever 12 are connected to each other by the springs 21, 22 and 23, and the half lock protrusions 8 and 9 or the full lock protrusions 6 and 7 of the lock levers 2 and 3 and the stop protrusions 13 and 14 of the keeper lever 12, respectively.
It is rotationally biased in the direction to maintain the engagement with.

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

[0008]

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

When the sliding door is closed, first, the bearing rod 1 and the grooves 19, 20 of the lock levers 2, 3 are closed.
Abut. When the springs 21 and 22 are further closed against each other, the stop protrusions 13 and 14 of the keeper lever 12 and the half lock protrusions 8 and 9 are engaged with each other, and the half lock state is established.
When the spring 21 and 22 is further closed, the receiving rod 1 and the receiving grooves 4 and 5 of the lock levers 2 and 3 are engaged and locked, and the locking projections 13 and 14 of the keeper lever 12 and the full lock projections. 6 and 7 are engaged with each other and the locked state is maintained.

[0010]

In the illustrated embodiment, both ends of pivots 21, 22 and 23 fixed to the front and rear face plates 15 and 16 of the case 26 and a pivot 24 pivotally attached to the front face plate 15 are swaged and pulled out. Have been thwarted.

Lock levers 2 and 3 and keeper lever 12
The biasing springs 21, 22, and 23 are configured by torsion springs in which the coil parts are fitted to the pivots 10, 11, and 25, respectively.
The lock levers 2 and 3 and the keeper lever 12 are mounted on the front surface. In FIG. 1, the spring 21 urges the lock lever 2 to rotate clockwise, and the spring 22 indicates the lock lever 3.
Is urged to rotate in the counterclockwise direction, and the spring 23 urges the keeper lever 12 to rotate in the clockwise direction.

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 fully locked state is the receiving rod 1. Almost matches the diameter of.

[0013]

As described above, in the sliding door latch device of the present invention, in the locked state, the receiving rod 1 is engaged with the receiving grooves 4 and 5 of the two lock levers 2 and 3 to slide. The vertical and horizontal movements of the door are accurately suppressed, and the sliding door does not rattle due to vibration and impact when the cold storage vehicle is running, and can withstand high loads.

[Brief description of drawings]

FIG. 1 is a front view of a sliding 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]

 1 Receiving Bar 2 Lock Lever 3 Lock Lever 4 Receiving Groove 5 Receiving Groove 6 Full Lock Protrusion 7 Full Lock Protrusion 8 Half Lock Protrusion 9 Half Lock Protrusion 10 Axis 11 Axis 12 Keeper Lever 13 Stopping Protrusion 14 Stopping Protrusion 15 Front Plate 16 Rear Plate 17 Reset Lever 18 Drive Protrusion 19 Groove 20 Groove 21 Spring 22 Spring 23 Spring 24 Axis 25 Axis 26 Case

Claims (1)

[Claims] 1. A receiving rod 1 fixed to a fixed frame 27;
Groove 1 that is fixed to the slide door 28 and that receives the receiving rod 1
Case 26 having 9 and 20; receiving grooves 4 and 5 provided at the front end, half-lock projections 8 and 9 and full-lock projections 6 and 7 provided adjacent to the base end, and an intermediate portion having a pivot shaft 10, Lock levers 2 and 3 pivotally attached to the case 26 by 11; and stop protrusions 13 and 14 that engage and disengage with the half lock protrusions 8 and 9 or the full lock protrusions 6 and 7 are provided at the base end portion, and the intermediate portion is provided with the pivot shaft 25. Keeper lever 1 pivotally attached to case 26 by
2; springs 21 and 22 for rotationally urging the half lock protrusions 8 and 9 or the full lock protrusions 6 and 7 of the lock levers 2 and 3 and the stop protrusions 13 and 14 of the keeper lever 12 in a direction to maintain the engagement. , 23; and a latching device for a slide door, which is provided with a drive projection 18 that abuts against the tip of the keeper lever 12, at the base end, and a reset lever 17 pivotally attached to a case 26 by a pivot 24 at an intermediate portion.