JPH088214Y2 - Door locking device - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a door locking device incorporated in a door or other type of shutter provided at a doorway of a garage, a warehouse or a store.

[Prior Art] A door locking device for a shutter door, which includes a tumbler cylinder lock, a rotor provided at an inner end of the tumbler cylinder lock, and a rack tooth-type key lever that is linked to slide in and out in conjunction with the rotor It is disclosed in Japanese Utility Model Publication Nos. 57-59564 and 48-25659.

[Problems to be Solved by the Invention] In such a conventional device, when a plate key is inserted into a key hole of a cylinder lock and a rotor is rotated together with a rotary plug, the rotor is rotated to 0
It is rotated 180 ° from the starting device of °, and at that position of 180 ° the key lever is extended to the maximum for locking. Then, once locked, the lock lever becomes a dead point with respect to the teeth of the rotor and is locked so that it cannot be operated from the key lever side.

However, the dead point condition is 90 °
It is also performed in the rotated intermediate position, and at that time the lock lever and drive lever become free, so if you loosen your hand at the intermediate position of 90 °, for example, the dead point becomes the same as the final position of 180 °. There is a problem in that a catch is generated, which causes a misunderstanding that the lock is completed.

The present invention has been made in view of the above problems of the prior art, and an object thereof is to eliminate an intermediate point of a rotor rotation operation by a plate key without causing a dead point. It aims to provide a door locking device that completely eliminates the illusion of lock completion at the position, can achieve the purpose with a little modification without adding special mechanism or parts, and has a simple structure and can be implemented at low cost. Is.

[Means for Solving the Problems] In order to achieve the object, the door locking device according to the present invention is
A cylinder lock 2 having a rectangular shallow box-shaped case body 1 which holds a rotary plug 2a fixed to the center of the case and operated by a plate key, and a cylinder lock 2 which is rotatable around an inner end of the rotary plug. And a rotor 3 integrally formed with two A gears 3a and B gears 3b having different tooth shapes and pitches, and the A gear 3a of the rotor 3 meshes with the case body 1 to slide back and forth in the longitudinal direction. The drive lever 4 is held so as to have teeth 5a so as to mesh with the B gear 3b of the rotor 3, but due to the forward / backward sliding of the teeth 5a side, the teeth of the rotor and the dead point are brought into a dead point state. To the drive lever 4 and the drive lever 4 in which the rotation of the gear 5a is not transmitted, and the teeth of the tooth 5a are not rotated at the meshing position before and after the sliding. Located between the lock lever 5 and the spring 9 More will slide freely key lever 8 for locking lever 5 and interlocking with and the rotor 3 as attract each other, the lock lever 5 and drive lever 4
Are coupled by the engagement of the engagement piece 5b and the engagement hole 4b, and the teeth 5a of the lock lever 5 with respect to the B gear 3b of the rotor 3 are prevented from being locked at the intermediate position (90 °) of the rotor 3. The central part and both ends are left and the part between them becomes a toothless part.

[Operation] When the plate key 16 is inserted into the key hole 6 of the cylinder lock 2, the rotary plug 2a becomes rotatable because the tumbler pin 2b retracts. Next, when the rotary plug 2a is rotated counterclockwise (in the direction of arrow a) by operating the key 16, the rotor 3 also rotates in the same direction. Due to the rotation of the rotor 3, the drive lever 4.4 meshing with the A gear 3a of the rotor 3 slides at the same time and projects in the left and right longitudinal directions from the case body. At the same time, the lock lever 5 also slides integrally with the drive lever due to the engagement between the engaging piece 5b and the engaging hole 4b, and the sliding of the lock lever 5 pulls the key lever 8 in the same direction via the spring 9. Since it slides, it will be locked at the maximum extension position.

The relationship between the rotor 3 and the lock lever 5 will be described with reference to FIG.

In the starting device, the key lever 8 and thus the lock lever 5 are in the shortened position, and the rotor 3 is also in the 0 ° position (Fig. 4a). At this 0 ° starting position, the B gear 3b of the rotor 3 is in a dead point state by contacting the middle and the extreme end (left end) 5a ″ .5a of the lock lever 5. Therefore, the lock lever 5 is in the protruding direction. Cannot be slid on its own because it is locked.

From this state, the plate key is then operated to rotate the rotor 3 in the counterclockwise direction (arrow a) by using the rotary plug.
A gear lever 3 is engaged with the drive lever 4 to lock the lock lever 5
Slides in the protruding direction. At the 90 ° intermediate position (Fig. 4b), the intermediate tooth 5a of the lock lever 5 is located exactly in the middle of the two teeth 3b.3b 'of the B gear of the rotor 3, but the intermediate tooth 5a
The lock lever 5 is not locked because it is separated from and has left and right teeth.

Further, when the rotor 3 is further rotated from the intermediate position of 90 ° to the final position of 180 ° (Fig. 4c), the lock lever 5 and the B gear of the rotor 3 move to the middle and right end teeth of the lock lever 5. 5a.5a 'has two gears 3b.3 of the B gear of the rotor 3
Since b'abuts at the same time and enters the same state as before starting, the lock lever 5 is locked in the left and right sliding directions, and the rotor 3 cannot be transmitted from the lock lever 5 side.

FIG. 6 shows the relationship between the conventional rotor and the lock lever. In the figure, the locked state is reached at the intermediate position of 90 ° (Fig. 6b), and the lock lever and the drive lever are free, so if the rotor is stopped at the 90 ° position in the middle of the plate key operation, Is transmitted to the rotor and becomes a dead point, which is an illusion that lock is completed.

[Effect] The present invention has the following unique effects.

The teeth of the lock lever are formed with a toothless portion so as not to become a dead point with the teeth of the rotor at an intermediate position of 90 °, thereby eliminating the phenomenon of stopping at the intermediate position and completely eliminating the illusion of lock completion.

Even if the teeth of the lock lever are toothless at the intermediate position, the lock lever does not move freely because it is integrally connected to the drive lever by the engagement piece and the engagement hole.
It can be locked and unlocked reliably.

The objective can be achieved by a slight modification without adding any special mechanism or parts, and the structure can be implemented easily and inexpensively.

[Embodiment] A preferred embodiment of the present invention will be described below.

The case body 1 has a rectangular shallow box shape and a cover plate at the opening.
Provide 1a.

The cylinder body of the cylinder lock 2 is fixed to the bottom of the case body 1, a rotary plug 2a is rotatably fitted in the cylinder, and is fixed by a cap 2c. When the plate key 16 is removed, the tumbler pin 2b projects from the peripheral body portion of the rotary plug 2a by a built-in spring so that it cannot rotate, and when it is inserted, it retracts.

The rack teeth 4a of the drive lever 4 are formed with a constant pitch,
The A gear 3a of the rotor 3 always meshes with each other to cause a shift,
It doesn't move.

The key lever 8 has a toothless portion 8a so that the rotor 3 is always free.

Four B gears 3b of the rotor 3 are provided at a pitch of 90 °,
The corresponding lock lever 5 is composed of an intermediate tooth 5a and start and end teeth 5a'.5a ", and a toothless portion 5c is provided between 5a-5a 'and 5a-5a".

The lock lever 5 and the drive lever 4 are engaged with each other by the engagement piece 5b and the engagement hole 4b, but the concave and convex fitting may be reversed, and an engagement means such as a pin and a notch or a slot is provided. May be

The key lever 8 is connected by a spring 9 so as to be pulled by the lock lever 5, and follows the movement of the lock lever 5.

[Brief description of drawings]

FIG. 1 is a plan view of a door locking device according to the present invention, FIG. 2 is a sectional view taken along line AA of FIG. 1, FIG. 3 is a sectional view taken along line BB of FIG. 1, and FIG. a) (b) (c) are action diagrams showing the relationship between the rotor and the lock lever, FIG. 5 is a perspective view of essential parts of the device of the present invention, and FIG. 6 is a action showing the relationship between the conventional rotor and the lock lever. It is a figure. 1 ... Case main body, 2 ... Cylinder lock 3 ... Rotor, 4 ... Drive lever 5 ... Lock lever, 6 ... Key hole 8 ... Key lever, 9 ... Spring 3a ... A gear, 3b ... B gear 5a.5a'.5a ″ … Tooth, 5b… Engagement piece 4b… Engagement hole

Claims (1)

[Scope of utility model registration request] 1. A cylinder lock 2 comprising a rectangular shallow box-shaped case body 1 and a rotary plug 2a fixed to the center of the case and operated by a plate key, and a rotary plug of the cylinder lock 2. A rotor 3 rotatably provided at the inner end and integrally formed with two A gears 3a and B gears 3b having different tooth shapes and pitches, and the A gear 3a of the rotor 3 and the longitudinal direction of the meshing case body 1 The drive lever 4 is held so as to slide forward and backward, and the tooth 5a is provided so as to mesh with the B gear 3b of the rotor 3. Depending on the forward and backward sliding on the tooth 5a side, the rotor tooth and the dead point The lock lever 5 in which the rotation is not transmitted to the rotor, and the teeth of the tooth 5a are missing the corners so that the B gear 3b idles at the meshing position before and after the sliding. Between the drive lever 4 and the lock lever 5 Locked by the spring 9 lever 5
The lock lever 5 and the drive lever 4 are connected to each other so as to attract each other and are slidable with respect to the rotor 3, and the lock lever 5 and the drive lever 4 are engaged by the engagement piece 5b and the engagement hole 4b. The teeth 5a of the lock lever 5 with respect to the B gear 3b of the rotor 3 are coupled to each other, leaving the center and both ends so as not to be locked at the intermediate position (90 °) of the rotor 3 and forming a gap between them. A door locking device characterized in that