JPH0460206A - Locking device - Google Patents

Abstract

PURPOSE:To facilitate locking and unlocking operation without using a tool by rotating a doughnut-like grip, and pushing a lock pin by means of a cam in the grip while fitting the pin to a lock groove formed on a shaft. CONSTITUTION:A lock pin 13 catches a shaft 1 to provide a locking condition. A push pin 16 is pushed by a cam 24 to compress a push spring 15. When a grip 21 is rotated counterclockwise from this condition, a push pin 16 is relatively moved along a linear portion 24A of a cam 24 in the direction of an opposite side of a stopper 24B of the cam 24, preparing a large space in a chamber 23. Force for pushing a cylinder 14 through the push pin 16 is released, the lock pin 13 together with the cylinder 14 is returned by an elastic force of a returning spring 17, and dislocated from a lock groove 2. The relation between the lock pin 13 and a shaft 1 locked thereby is released. Oppositely to the releasing motion, the lock pin 13 is pushed in the shaft 1 for locking it axial movement by rotating the grip 21.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a locking device, and more particularly to a locking device suitable for locking members that are mounted on a support shaft and rotate relative to each other.

[Conventional technology]

BACKGROUND ART Structures and operations that involve repeated connection and separation, such as the relationship between a case and a lid, or parts and parts, are both known and performed in daily life.

The most common method suitable for maintaining or releasing the fixed relationship between the fixed object and the fixed object is to use screws such as bolts.

Also known is a device in which the eldest child is rotated and fixed using a highonet.

[Problem to be solved by the invention]

The above-mentioned bolt-based locking device has the advantage of a simple structure and reliable locking function, but it requires a tool to turn the bolt, making it difficult to lock and unlock frequently. The tools are quite cumbersome to use.

Further, there have been problems such as the threads of the bolts being crushed due to wear when tightening and releasing the bolts, and the bolt heads being destroyed.

[Purpose of the invention]

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a locking device that can be easily locked and unlocked without using tools.

[Means for Solving the Problems] In order to achieve the above-mentioned objects, the present invention includes a disk fitted to an object to be fixed, such as a shaft having a lock groove;
The disc includes a grip rotatably attached to the disc, and the disc has a housing space passing through it in the radial direction, and a lock pin having a habit in the unlocking direction is installed in the housing space. A cam is mounted on the grip and moves along the circumferential direction so that the cam can push the locking pin out of the storage space via a push pin provided with a pushing habit, The structure is such that locking and unlocking can be performed by rotating the handle.

[For production]

In the lock device of the present invention, by rotating the donut-shaped grip, the cam inside the grip pushes out the lock pin in the radial direction to fit it into the lock groove provided on the shaft, etc.
By rotating the grip in the opposite direction, the lock bottle automatically escapes from the lock groove and releases the lock.

[Embodiments of the invention]

Embodiments of the present invention will be described below with reference to the accompanying drawings. In the figure, reference numeral 1 indicates a shaft as a fixed object, and a lock groove 2 is formed along the circumferential direction of the shaft 1.

Furthermore, step portions IA and IB are formed on this shaft 1, and a disk 11 is fitted to the shaft 1 limited to the step portion IA, and a lock pin is fitted to the disk 11 along the radial direction. A storage space 12 such as the above is formed. This accommodation space 12 penetrates to the shaft hole, and a lock pin 13 is accommodated in this accommodation space 12. This lock pin 13
The side opposite to the shaft is a cylinder 14, and this cylinder 14 has a larger outer diameter than the lock pin 13 and is located in the housing space 1.
It is neatly housed in 2. A push pin 16 that is constantly pushed by a push spring 15 is housed in the cylinder 14,
The push pin 16 is designed to protrude from the outer periphery of the disk 11, and the cylinder 14 is pushed against the lock pin 13 by a return spring 17 interposed between the cylinder 14 and the end of the housing space 12. It gives a habit of immersion.

The disk 11 is accommodated in a space 22 at the inner center of a donut-shaped grip 21, and a chamber 23 that partially bulges in the radial direction is formed continuously in the space 22 of the grip 21. This chamber 23 has a straight part 24A extending along the tangential direction of the disk 11, and a stopper 24A at the end thereof.
A cam 24 having a diameter of 4B is attached by a set screw 25, and the push pin 16 abuts against the straight portion 24A of the cam 24 due to its own protruding habit. The grip 21 has a stepped portion 21
A is restricted by the stepped portion IB of the shaft 1, and movement around the shaft is permitted.

Next, the operation of the lock and unlocker by the locking device of the present invention will be explained. First, Figure 2 shows the lock pin 13.
grips the shaft 1 to indicate the locked state, and the push pin 16 grips the cam 2.
4 to compress the compression spring 15.

When the grip 21 is rotated counterclockwise in FIG. 2 from this state, the push pin 16 will move relatively along the linear portion 24A of the cam 24, and will move toward the opposite side of the stopper 24B of the cam 24. As a result, the space in the chamber 23 becomes larger, and the force that was pushing the cylinder 14 through the push pin 16 is released, and the lock pin 13 is returned together with the cylinder 14 by the elasticity of the return spring 17, and escapes from the lock groove 2. do.

As a result, the relationship with the shaft 1 that was restrained by the lock pin 13 is released.

In addition, each time the grip is rotated, contrary to the release operation, the push pin 16 is pushed in by the cam 24, and the cylinder 14 and the lock pin 13 are pushed in via the push spring 15, and the tip of the lock pin 13 is fixed to the shaft 1. It is invaginated into the lock groove 2.

As a result, movement in the axial direction with respect to the shaft 1 is restricted.

[Effects of the Invention] As described above, in the present invention, the push pin is pushed by the cam provided in the inner part of the grip by rotating the grip while resisting the backward movement of the lock pin housed in the disk. Since it is configured so that the rotation can be locked between the shaft and the disc by pushing in the radial direction through the shaft, it is possible to lock and unrotate the shaft and the rotating body frequently, for example. , it is possible to provide an unprecedented and excellent locking device that can be operated manually and extremely easily.

FIG. 2 is a sectional view taken along the line ■-■ in FIG. 1.

DESCRIPTION OF SYMBOLS 1... Shaft, IA, IB... Step part, 2... Lock groove, 11... Disk, 12... Accommodation space, 13...
- Lock pin, 14... cylinder, 15... push spring, 16... push pin, 17... return spring, 21...
Gri Nobu, 22...Space, 23...Room, 24...
・Cam, 24A...straight line part, 24B...stopper,
25... Don't stop.

Applicant: Nippon Electric Co., Ltd. Agent: Patent attorney, Isamu Takahashi

[Brief explanation of the drawing]

Claims (1)

[Claims] (1) A disc is fitted onto an object to be fixed such as a shaft having a lock groove, and a grip is rotatably attached to the disc. There is a housing space, and a lock pin having a lock release behavior is housed in the housing space, and a cam that operates along the circumferential direction is attached to the grip, and this cam has a pushing behavior. A locking device characterized in that the locking pin can be pushed out of the storage space through a provided push pin, and is configured to be locked and unlocked by rotating a grip.