JP2001207713A - Latch lock - Google Patents

Abstract

(57) [Summary] [PROBLEMS] All components are press-worked except for the coil spring, and the connection of the components is made possible by spot welding. In addition, the compression coil spring fits well, is sufficiently protected, and is simple to withstand long-term use. Provide a latch lock. SOLUTION: A cover 1 and a base plate 10 are all formed by press molding, and a guide groove 3 for guiding a latch 5 and a spring housing groove 3 are formed in the cover 1, and the spring housing groove 3 is formed.
Is closed at one end. The inner end of the latch plate 5 is bent in a crank shape to support a compression coil spring 20 in the spring housing groove 3. The latch plate 5 is urged outward by a compression coil spring 20.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a latch lock used for a switchboard door, a hatch board for water supply and sewerage, a shed, a sliding door, a shutter, and the like.

[0002]

2. Description of the Related Art A conventional latch lock has a cover or a main body composed of two parts. The latch plate is housed inside and is biased by a torsion spring so that the latch plate protrudes outward. In general, the cover or main body composed of two parts can be assembled and disassembled with screws or the like. is there. Therefore, the structure is complicated and the assembling work is troublesome.

[0003]

According to the present invention, all components except for the coil spring are formed by press working, and the joining of the components can be performed by spot welding. In addition, the compression coil spring is well fitted, is sufficiently protected, and is used for a long time. It is intended to provide a simple latch lock capable of withstanding the above.

[0004]

Means for Solving the Problems In order to solve the above-mentioned problems, according to the present invention, a pair of left and right guide grooves 2 on which a latch plate 5 is slidable and a spring housing in which the middle thereof is further expanded into an arch tunnel type. The cover 1 having the groove 3 is formed by press working, and the bottom surface of the cover 1 is combined with a flat base plate 10 and at least two covers 1 and the base plate 10 are appropriately welded at each flange portion 11 by spot welding or the like. Combine by means. One end face formed by the cover 1 and the base plate 10 is closed by a stopper 12 formed by bending one of the members of the cover 1 and the base plate 10. The rear end of the single latch plate 5 that slides is formed with a spring support portion 6 which is thinned and bent into a crank shape by press working. The spring support portion 6 is located at the center of the spring storage groove 3, and the spring storage groove 3 is provided with an elongated hole 4 through which an operation pin 15 penetrates. The root is implanted in the latch plate 5. A compression coil spring 20 is provided between the closed end surface 12 and the spring support 6 of the latch plate 5, and the tip of the latch plate 5 always projects from the open ends of the cover 1 and the base plate 10. Being energized.

[0005] An example of a method of manufacturing and assembling the latch lock of the present invention configured as described above is as follows. That is, the cover 1 has a pair of guide grooves 2 formed by a breathing process, and an arch tunnel type spring storage groove 3 at the center thereof.
In addition, two mounting holes 13 are formed in the elongated hole 4 and the flange portion 11.

The base plate 10 is formed to have the same size as the contour of the cover 1 by press working, and a stopper 12 for closing one end of the arch tunnel type spring housing groove 3 is bent at a right angle at the center of one end. , At the same time the cover 1
A mounting hole is formed at the same position as the mounting hole 13, and a working hole 14 is formed at a position close to the outer end of the long hole 4 of the cover 1.

[0007] The latch plate 5 is formed in a plate-like contour shape, and is provided with a spring supporting portion 6 formed by narrowing the width of the rear end portion and pressing it into a crank shape. The spring support 6 is formed so as to be located exactly at the center of the depth of the spring support groove 3. A small hole 9 for mounting the root 18 of the operation pin 5 is formed at a desired position on a part of the latch plate 5. The operation pin 15 may be a straight pin having the same diameter, but the large diameter portion 1
6 may be provided. The root of the operation pin 15 is formed in a small diameter portion 17 that can be inserted into the small hole 9. These are formed in advance by a plastic working method for forming a rivet or the like.

In order to assemble these members, first, the cover 1 and the base plate 10 are connected to each other by spot welding 21 at least two places on one side of the flange portion 11 by aligning the positions of the mounting holes 13. In the illustrated example, three spot welds 21 are provided on each side (see FIG. 1). By doing so, one end of the spring support groove 3 is closed by the stopper 12.

Next, when the compression coil spring 20 is inserted through the opening of the spring accommodating groove 3 and then the spring support 6 of the latch plate 5 is inserted into the guide groove 2 first, the spring support 6 is already inserted. It fits inside the compression coil spring 20.
In this state, the latch plate 5 is further pushed in a little, and the operation pin 15 is inserted from the outside of the long hole 4, and the small diameter portion 1 at the root thereof is inserted.
7 is fitted into the small hole 9 of the latch plate 5, the base of the operation pin 15 is caulked through the work hole 14 of the base plate 10, and the operation pin 15 is firmly fixed to the latch plate 5.

In this manner, the tip of the latch plate 5 is urged by the restoring force of the compression coil spring 20 so as to always protrude from the open end of the cover 1 or the like, and the operation pin 15 is elongated.
Stopped at the position where

In the latch lock constructed as described above, since all of the constituent members are formed by press working or plastic working, it is tough, and the rear end of the latch plate 5 has a crank shape. Since the compression coil spring 20 is fitted in the spring support portion 6 formed by press working on the compression coil spring 20, the compression coil spring 20 always stays in a normal position, does not cause a failure, and the outside is an arch. It is protected by the tunnel type spring support groove 3 and does not buckle. Further, since the latch plate 5 uses a compression coil spring, a large stroke can be obtained.

[0012]

The latch lock of the present invention configured as described above has a simplified overall configuration, and the compression spring is supported by the spring support groove 3 so as not to buckle, so that it can be easily received. Withstand long-term use. Further, since each part can be easily manufactured and assembled by press working and spot welding, a durable and inexpensive product can be provided to the market.

[Brief description of the drawings]

FIG. 1 is a front view of a latch lock according to an embodiment of the present invention, which is partially cut away.

FIG. 2 is a longitudinal sectional side view of the latch lock of FIG. 1;

FIG. 3 is a right side view of the latch lock of FIG. 1;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Cover 2 Guide groove 3 Spring storage groove 5 Latch plate 6 Spring support part 10 Base plate 11 Flange part 12 Stopper 13 Mounting hole 14 Working hole 15 Operation pin 16 Large diameter part 17 Small diameter part 20 Compression coil spring

Claims (1)

[Claims] 1. A cover 1 having a pair of left and right guide grooves 2 on which a latch plate 5 is slidable and a spring housing groove 3 having a middle portion bulged further in an arch tunnel shape is formed by press working. Is fitted with a flat base plate 10, and the cover 1 and the base plate 10 are connected to each other at least two at each flange portion 11 by a suitable welding means such as spot welding, and formed by the cover 1 and the base plate 10. One end face is closed by a stopper 12 formed by bending either one of the cover 1 and the base plate 10, and is provided behind a single latch plate 5 sliding with the pair of guide grooves 2. A spring support portion 6 having a narrow end and bent by press working in a crank shape is formed. The spring support portion 6 is located at the center of the spring storage groove 3. Pin 15 Is provided in the length direction thereof, and the root of the operation pin 15 is implanted in the latch plate 5, between the closed end surface 12 and the spring support 6 of the latch plate 5. A latch lock characterized in that a compression coil spring 20 is provided, and a tip end of the latch plate 5 is urged to always protrude from an open end of the cover 1 and the base plate 10.