JPH0334552B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a lock for attaching to a shutter, sliding door, or other door.

Various conventional locks of this type have been provided in which the lock is locked in the locked position by sliding a locking lever or rod linearly against the force of a spring.

For example, in the lock of Utility Model Publication No. 47-12153, the lockshaft, which is biased in the unlocking direction by a spring, is restrained by a locking plate biased in an inclined position, thereby restraining the lockshaft at an arbitrary position. is disclosed.

However, in the above configuration, the locking plate is restrained by obliquely abutting against the lockshaft, so a force in the bending direction is applied to the lockshaft.
Plate-shaped lock levers used for locks on shutters and the like have thin walls, so there is a risk of bending and damaging them.

On the other hand, hold a bar etc. from both sides using a ball,
A structure in which the balls are rolled on a tapered cam surface to narrow the distance between the balls and to clamp and restrain a bar or the like from both sides is also known, for example, in Japanese Utility Model Publication No. 12153/1983.

In the above configuration, since the bar is restrained by the ball,
It is necessary to form an axially extending arcuate groove on both sides of the bar, which guides the rotation of the freely rotatable ball, causing it to roll along the axial direction of the bar. be able to.

However, a thin plate-shaped lock lever has the disadvantage that forming an arcuate groove weakens the strength of the lock lever.

This invention was made in view of the above circumstances,
The main purpose of this is to use rollers to pinch the lock lever in a lock that uses a plate-shaped lock lever, and to make the rollers rollable with a simple structure without forming grooves on the wide surface of the lock lever, thereby pinching the lock lever. Our goal is to provide a lock that makes it possible.

In order to achieve the above object, the present invention provides a plate-shaped locking lever that slidably passes through a lock body made of a hollow casing in the longitudinal direction, protrudes outward at both ends, and has a tip end serving as a locking protrusion. is built into the lock body and externally fits the lock lever, and is compressably interposed between the inner wall on the distal end side of the lock body and a locking part formed at an intermediate position of the lock lever, and A first coil spring biased in the unlocking direction is provided, formed on the proximal end side of the lock body, facing the lock lever at a position sandwiching the lock lever from both sides with its wide side, and the spacing thereof gradually increases in width as it moves toward the proximal end side. A pair of narrowly set tapered surfaces are provided, and between the tapered surface and the lock lever passing through the center thereof, a pair are interposed on both sides of the wide surface of the lock lever along the width thereof so as to be perpendicular to the extending direction of the lock lever. cylindrical rollers are provided, a pair of roller through-holes having a cross-sectional groove shape and into which the rollers are rotatably fitted are provided at opposing positions on both side walls of the groove, and the lock lever is provided on the bottom wall of the groove. A lock is provided with a retainer having a rectangular lever insertion hole through which the lever is inserted, one groove side wall extending to protrude outside the lock body, and a release piece having a tip bent in a direction away from the lock lever. The first coil spring is externally fitted and built into the main body, and is compressably interposed between the inner wall on the distal end side of the lock main body and the distal end surface of the groove bottom wall of the retainer, so as to connect the retainer to the tapered surface. The following technical measures have been taken: a second coil spring is provided that biases the width toward the narrow side, and a lever retaining protrusion that protrudes in the middle of the lock lever and abuts the tip of the retainer is provided.

Hereinafter, preferred embodiments of the lock of the present invention will be described based on the drawings.

In FIGS. 1 and 2, a lock body 1 is comprised of a box-shaped casing with an open side on one side, and has a stopper member 2 fixedly installed inside one end by means of screws, welding, etc. .

A lock lever 3 for locking that also passes through the stopper member 2 is slidably provided on the lock body 1.

This lock lever 3 is formed into a flat plate shape with a stepped portion 3a provided approximately in the middle and narrower on the locking side, and a spring interposed between the stepped portion 3a and the inner end wall of the lock body 1 on the locking side. 4, it is always biased in the unlocking direction.

As shown in more detail in FIG. 3, the stopper member 2 has a substantially groove-shaped cross section, and its inner wall has tapered surfaces 2a and 2b facing the lock lever 3 at a distance between the front and back sides of the lock lever 3. is formed.

These tapered surfaces 2a, 2b are formed such that the distance between them and both surfaces of the lock lever 3 gradually becomes narrower toward the unlocking direction of the lock lever, that is, toward the biasing direction of the spring 4.

Two rollers 6 are interposed between the tapered surfaces 2a, 2b and the lock lever 3 via a retainer 5.

These rollers 6 are urged by a spring 7 via a retainer 5 toward the narrow side of the tapered surface.

The retainer 5 has release means 8 for pushing the rollers 6 against the springs 7.

That is, the retainer 5 has a cross-sectional groove shape as shown in more detail in FIG.
a, 5b, and a lever penetration hole 5c drilled in the bottom wall of the groove.
The lock body 1 is integrally connected to the center of one side wall of the groove and extends along the lock lever 3.
The release means 8 is an angle piece extending to the outside.

In this retainer 5, the roller insertion holes 5a,
The rollers 6 are rotatably fitted into each of the rollers 5b,
In addition, a lock lever 3 for locking is provided in the lever penetration hole 5c.
is inserted.

Next, to describe the operation of the above embodiment, when the lock lever 3 is at rest, each roller 6 is pushed into the narrow direction between the tapered surfaces 2a, 2b and the lock lever 3 by the biasing force of the spring 7. .

Therefore, the lock lever 3 is held under pressure by the rollers 6.

When the lock lever 3 is slid in the locking direction against the spring 4 from this state, the rollers 6 that were in pressure contact with both sides of the lock lever 3 move slightly away from both sides of the lock lever 3 along the tapered surfaces 2a and 2b. to roll.

Therefore, at the same time as the lock lever 3 starts sliding in the locking direction, the lock by the rollers 6 is automatically released and the lock lever 3 smoothly slides to the locked position.

When the lock lever 3 stops sliding when it reaches the locking position, the roller 6 is again pushed into the narrow direction between the tapered surfaces 2a, 2b and the lock lever 3 by the spring 7.

Therefore, when the lock lever 3 stops sliding, it is chucked by the wedge action of the rollers 6 and held in the locked state.

That is, when the lock lever 3 slides in the locking direction, the locking lock by the rollers 6 is automatically unlocked, and when the locking lever 3 stops sliding, it is automatically locked by the rollers 6 again. Any stroke position in the locking direction is executed smoothly.

Since the lock lever 3 can be locked at any stroke position and the lock position (locked position) can be set steplessly, the lock body 1 has a lock receptacle (not shown) into which the tip of the lock lever 3 is inserted. Restrictions on setting the mounting distance to a so-called lock receiving element such as a tool are significantly relaxed.

As described above, when the release means 8 is pushed against the urging spring 7 of the roller 6 in a state where the lock lever 3 is locked in the locked position, the roller 6 moves through the retainer 5 to the tapered surfaces 2a, 2b.
and the lock lever 3 in the wide direction.

Therefore, the locking of the locking lever 3 by the rollers 6 is released.

At the same time as the lock is released, the lock lever 3 in the locked position is moved back by the spring 4, thereby being unlocked.

In addition, the reference numeral 9 in FIGS. 1 to 3 is a pin for preventing the lever from coming off, which is provided on the lock lever 3 and is used to engage and disengage the inner end of the retainer 5.

As described above, according to the configuration of the present invention, when the locking lever is slid in the locking direction, it can be automatically chucked and locked with an arbitrary stroke.

In addition, this locking is performed smoothly and reliably by the wedge action of the rollers using the tapered surface, so there is no noise such as metallic sounds when the lock is locked, and failures are unlikely to occur.

Furthermore, since rollers are used, the rollers roll along the wide surface of the lock lever, and the rollers can come out of contact with the wide surface of the lock lever or move to another location without providing any guide means on the contact surface of the lock lever. It can be rolled normally without any problems.

[Brief explanation of drawings]

FIG. 1 is a rear view of a lock according to a preferred embodiment of the present invention, FIG. 2 is a sectional view taken along the line -- in FIG. It is. 1...Lock body, 2a, 2b...Tapered surface, 3
... Lock lever, 4 ... Spring, 6 ... Roll, 7 ... Spring, 8 ... Release means.

Claims (1)

[Scope of Claims] 1. A lock lever in the form of a plate that slidably passes through a lock main body made of a hollow casing in the longitudinal direction, protrudes outward at both ends, and has a tip end serving as a locking protrusion; and a lock. The lock lever is built into the main body and externally fits the lock lever, and is compressably interposed between the inner wall on the distal end side of the lock main body and a locking part formed at an intermediate position of the lock lever to move the lock lever in the unlocking direction. a first coil spring for energizing; and a taper formed on the proximal end of the lock body so as to sandwich the lock lever from both sides on its wide side, and whose width gradually becomes narrower as the gap thereof approaches the proximal end. a pair of cylindrical rollers interposed between the tapered surface and the lock lever passing through the center thereof, and interposed along the width on both sides of the wide surface of the lock lever so as to be orthogonal to the extending direction of the lock lever; A pair of roller insertion holes, into which the rollers are rotatably fitted, are provided at opposing positions on both side walls of the groove, and a rectangular lever hole through which the lock lever is inserted is provided in the bottom wall of the groove. a retainer having a release piece with an insertion hole, one side wall of the groove portion extending to protrude outside the lock body, and a release piece having a tip bent in a direction away from the lock lever; and the first coil spring inside the lock body. is fitted externally and built in, and is compressably interposed between the inner wall on the distal end side of the lock body and the distal end surface of the groove bottom wall of the retainer, and biases the retainer toward the narrow side of the tapered surface. A lock characterized by comprising a two-coil spring and a lever retaining protrusion that is protruded in the middle of the lock lever and abuts against the tip of the retainer.