JP2002201834A - Side bar cylinder lock - Google Patents

Abstract

PROBLEM TO BE SOLVED: To surely prevent an illicit unlocking action to enhance the crime preventive performance and to simplify and hasten the assembling work of a side bar. SOLUTION: This cylinder lock comprises an inner cylinder 1 having a keyhole 1a and a tumbler 1b, and an outer cylinder 2 for rotatably housing the inner cylinder 1. The inner cylinder 1 is engaged with the outer cylinder 2 through the side bar 4. When a key 5 is inserted to the keyhole 1a, the tumbler 1b is set, and the base end of the side bar 4 is engaged with the dent 1b1 of the tumbler 1b to make the inner cylinder rotatable to the outer cylinder 2. The keyhole 1a is opened in an off-centered position of the inner cylinder 1 in parallel to the repelling direction of the side bar 4. The tumbler 1b is formed in a pin shape, and provided in two rows with the tip opposed to the keyhole 1. A lateral pair of side bars 4 is provided on the diameter line of the inner cylinder 1, and elastically repelled by a plate spring 3 to engage with the engagement groove 2a of the inside surface of the outer cylinder 2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a cylinder lock, and more particularly to a sidebar cylinder lock formed with a tumbler and a sidebar.

[0002]

2. Description of the Related Art Conventionally, as a cylinder lock of this type, for example, an inner cylinder in which a keyhole is formed extending in the axial direction and a plate-shaped tumbler is arranged along the longitudinal direction of the keyhole,
Some include an outer cylinder that rotatably stores the inner cylinder. In the case of this conventional product, the inner cylinder is engaged with the outer cylinder via the side bar, and when the key is inserted into the keyhole, the tumbler is set, and the base end of the side bar engages with the recess of the tumbler. The engagement between the inner cylinder and the outer cylinder is released, and the inner cylinder becomes rotatable (for example, Japanese Patent Laid-Open No. 2-38).
675).

[0003]

By the way, this kind of cylinder lock is formed so that illegal unlocking (picking) using a pick (unlocking tool) can be surely prevented so that security performance is improved. Is desirable.

However, in the conventional product, the tip of the tumbler faces the keyhole along the vertical direction of the keyhole (the vertical direction of the key), and the tumbler is not only formed in a plate shape but also in the shape of the keyhole. Since they are arranged in a line along the longitudinal direction, according to the conventional product, there is a problem that the pick is easily inserted into the keyhole for operation, and as a result, security performance is poor.

[0005] Further, since the conventional product has a structure in which the side bar is repelled laterally by a plurality of coil springs, according to the conventional product, the work of loading the coil spring and the work of assembling the side bar are troublesome. There has been a problem that assembling the cylinder lock takes time and effort.

The present invention has been proposed in view of such problems of the conventional products.

Accordingly, a technical problem of the present invention is to improve the security performance of a cylinder lock provided with a side bar by reliably preventing unauthorized unlocking, and to simplify the work of assembling the side bar. It is an object of the present invention to provide a sidebar cylinder lock formed so as to be able to speed up.

[0008]

The present invention employs the following technical means to solve the above-mentioned problems.

That is, according to the present invention, as shown in FIG. 1, a keyhole 1a is formed so as to extend in the axial direction.
a, an inner cylinder 1 having a tumbler 1b arranged along the longitudinal direction, and an outer cylinder 2 for rotatably storing the inner cylinder 1, and the inner cylinder 1 is repelled to the side. When the key 5 is inserted into the keyhole 1a through the side bar 4, the tumbler 1b is set. When the key 5 is inserted into the keyhole 1a, the base end of the side bar 4 engages with the recess 1b1 of the tumbler 1b, and the inner cylinder 1 is moved. A side bar cylinder lock rotatable with respect to the outer cylinder, wherein the keyhole is opened at an eccentric position of the inner cylinder and parallel to a resilient direction of the side bar;
b are formed in a pin shape, are provided in parallel in two rows with the tip facing the keyhole 1a, and the side bars 4 are provided on the diameter line of the inner cylinder 1 as a pair of left and right sides.
And is engaged with the engaging groove 2a on the inner peripheral surface of the outer cylinder 2 (claim 1).

In this case, the present invention preferably includes a side pin 1e controlled by an edge extending in the longitudinal direction of the key 5. In this case, the side pin 1e is housed in a housing hole 1f communicating with the keyhole 1a such that the base end thereof can penetrate into the keyhole 1a, and the outer cylinder 2 corresponding to the tip of the side pin 1e.
A concave portion 2b that engages with the tip of the side pin 1e is formed at an inner peripheral surface position of the second pin (claim 2).

In the case of the product of the present invention, since the side pin 1e is provided, there is an advantage that the picking can be prevented and the security performance can be improved accordingly.

Here, as the concave portion 2b, for example, there is a concave hole or a groove. In the case of the present invention, the recess 2b is preferably formed in a groove shape as shown in FIG. 1 and the like (claim 3).

According to this, even if the arrangement position of the side pins 1e is appropriately changed along the longitudinal direction of the outer cylinder 2, it is not necessary to individually form the concave portions 2b in accordance with the changed position. . In the case of the present invention, the side pins 1e may be provided on both sides of the keyhole 1a. In this case, security performance can be further improved.

In addition, according to the present invention, as shown in FIG. 1 and the like, the engagement groove 2a on the inner peripheral surface of the outer cylinder 2 engaging with the side bar 4 is formed.
It is preferable to form a total of three at 90 ° intervals in the circumferential direction (claim 4).

In this case, locking and unlocking can be performed at a clear and easy-to-operate position of 90 degrees, and when the inner cylinder 1 is rotated by 90 degrees, only one of the side bars 4 is in the engagement groove 2a. This is because, since the engagement is performed, the engagement state of the inner cylinder 1 can be released with a small force, and the operation can be facilitated.

Further, according to the present invention, a recess 5a for engaging with the tumbler 1b and a side pin 1 are formed on both plate surfaces and both end edges of the key 5.
It is preferable that the concave step portions 5b engaging with e are formed in the same pattern (claim 5).

This is because, in this case, the key 5 can be inserted and operated without checking the front and back of the key 5, and the usability is improved accordingly.

[0018]

Preferred embodiments of the present invention will be described below with reference to the accompanying drawings.

In FIG. 1 and the like, reference numeral 1 denotes an inner cylinder, and 2 denotes an outer cylinder which rotatably accommodates the inner cylinder 1. The inner cylinder 1
A keyhole 1a is formed extending in the axial direction, and a tumbler 1b is provided along the longitudinal direction of the keyhole 1a.

The inner cylinder 1 is engaged with the outer cylinder 2 via a side bar 4 which is resiliently pushed by a leaf spring 3. The left and right side bars 4 are provided on the diameter line of the inner cylinder 1.

The keyhole 1a is located at an eccentric position of the inner cylinder 1,
In addition, the opening is opened in parallel with the direction of rebound of the side bar 4. The tumbler 1b is formed in a pin shape, and is provided in two rows in parallel with the tip facing the keyhole 1a. The tumbler 1b is formed so that a recess 1b1 with which the base end of the side bar 4 engages is provided in the body in an annular shape. Reference numeral 1c denotes a coil spring that constantly repels the tumbler 1b toward the keyhole 1a. Reference numeral 1d denotes a closing lid for preventing the tumbler 1b and the coil spring 1c from falling off.

5 is a key. The present invention uses this key 5
Is inserted into the keyhole 1a, the tumbler 1b is set, and the base end of the side bar 4 is engaged with the recess 1b1 of the tumbler 1b, so that the inner cylinder 1 becomes rotatable with respect to the outer cylinder 2. In this embodiment, the key 5 has a recess 5a for engaging with the tumbler 1b and a recessed step 5b for engaging with the side pin 1e formed in the same pattern on both plate surfaces and both end edges.

The outer cylinder 2 has an engagement groove 2a at the inner peripheral surface position corresponding to the tip of the side bar 4, with which the tip of the side bar 4 engages. The engagement grooves 2 a extend in the longitudinal direction of the outer cylinder 2, and are formed in the present embodiment in a total of three engagement grooves separated by 90 degrees in the circumferential direction.

As shown in FIGS. 3 and 4, a nut 6 is screwed onto the outer peripheral surface of the outer cylinder 2, and the outer cylinder 2 is fixed to a mounting portion 7 such as a door by tightening the nut 6. .

The side pin 1e is controlled by an edge extending in the longitudinal direction of the key 5. This side pin 1e
Has a keyhole 1a at the base end in a storage hole 1f communicating with the keyhole 1a.
The keyhole 1a in this embodiment
Is provided on one side. The tip of the side pin 1e is
It is engaged with a concave portion 2b formed at a corresponding inner peripheral surface position of the outer cylinder 2. In this embodiment, the concave portion 2b extends in the longitudinal direction of the outer cylinder 2 and is formed in a groove shape.

Next, the operation of the present invention will be described.

First, as shown in FIG. 1, when the user inserts the key 5 into the keyhole 1a, each tumbler 1b is pushed back against the elastic force of the coil spring 1c, and the dent 1b is pressed.
1 is arranged at a position corresponding to the base end of the side bar 4.
In this case, the side pin 1e is also a concave step 5 at the edge of the key 5.
b.

Next, when the user rotates the key 5 clockwise in the same figure, the side bar 4 and the side pin 1e are rotated.
Are gradually pushed inward by the inclined surfaces of the engaging groove 2a and the concave portion 2b, and their base ends are engaged with the concave portion 1b1 of the tumbler 1b and the concave step portion 5b of the edge of the key 5, respectively. Then, when the side bar 4 and the side pin 1e are completely immersed in the inner cylinder 1, the engagement between the inner cylinder 1 and the outer cylinder 2 is released, and the inner cylinder 1 becomes rotatable (see FIG. 6).

As shown in FIG. 7, when the tip of one of the side bars 4 reaches a position corresponding to the upper engaging groove 2a, the leaf spring 3 is resilient. The tip of one side bar 4 is engaged with the upper engaging groove 2a, and the inner cylinder 1 is locked. Thus, for example, the locked state of the door is released and the door is unlocked.

When locking, the user turns the key 5 counterclockwise from the state shown in FIG. Then, one side bar 4 is pushed back inward by the same action as in the above example, and the engaged state between the inner cylinder 1 and the outer cylinder 2 is released. Then, when the user rotates the inner cylinder 1 counterclockwise by 90 degrees together with the key 5 (see the state of FIG. 1), and pulls the key 5 out of the keyhole 1a, the side bar 4 is turned by the action of the leaf spring 3. The end of the side bar 4 is engaged with the engagement groove 2a, and the inner cylinder 1 is engaged with the outer cylinder 2 (see the state of FIG. 5).

[0031]

As described above, according to the present invention, the tip of the tumbler has the keyhole in the narrow direction (the direction corresponding to the thickness of the key).
, The tumblers are arranged in two rows, and side bars are provided as a pair of left and right sides.

Therefore, in the case of the present invention, it is difficult to insert the pick into the keyhole and it is difficult to operate the pick inside the keyhole, so that the security performance can be improved.

Also, in the present invention, the side bar is resiliently spring-loaded, so that the side bar can be easily and quickly assembled.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing a main part of a preferred embodiment of a cylinder lock according to the present invention.

FIG. 2 is an exploded perspective view of a main part of the cylinder lock.

FIG. 3 is a front view of the cylinder lock.

FIG. 4 is an exploded side view of an essential part of the cylinder lock.

FIG. 5 is a longitudinal sectional view of a main part of the cylinder lock.

FIG. 6 is a vertical sectional view of an essential part for explaining the operation of the cylinder lock.

FIG. 7 is a vertical sectional view of a main part for describing the operation of the cylinder lock.

[Explanation of symbols]

 Reference Signs List 1 inner cylinder 1a keyhole 1b tumbler 1b1 recess 2 outer cylinder 2a engagement groove 3 leaf spring 4 side bar 5 key

Claims (5)

[Claims] 1. An inner cylinder having a tumbler extending in the axial direction and having a keyhole formed therein and arranged along the longitudinal direction of the keyhole, and an outer cylinder for rotatably storing the inner cylinder. When the key is inserted into the keyhole, the tumbler is set, and the base end of the sidebar is engaged with the dent of the tumbler. A sidebar cylinder lock in which the inner cylinder is rotatable with respect to the outer cylinder in combination, wherein the keyhole is opened at an eccentric position of the inner cylinder and parallel to the resilient direction of the sidebar. The tumbler is formed in the shape of a pin, and is provided in parallel in two rows with the tip facing the keyhole. The above-mentioned side bars are provided on the diameter line of the inner cylinder as a pair of left and right sides, and are resilient by a leaf spring. Characterized in that the side bar is engaged with an engagement groove on the inner peripheral surface of the outer cylinder. Cylinder lock. 2. The sidebar cylinder lock according to claim 1, further comprising a side pin controlled by an edge extending in a longitudinal direction of the key, wherein the side pin has a base end in a storage hole communicating with the keyhole. Characterized in that a recess is formed in the inner peripheral surface position of the outer cylinder corresponding to the tip of the side pin, the recess being engaged with the tip of the side pin. Tablets. 3. The sidebar cylinder lock according to claim 2, wherein the recess is formed in a groove shape. 4. The sidebar cylinder lock according to claim 1, wherein the engagement grooves on the inner peripheral surface of the outer cylinder that engage with the sidebar are separated by 90 degrees in the circumferential direction. A side bar cylinder lock characterized by having a total of three formed. 5. The sidebar cylinder lock according to claim 1, wherein both side surfaces and both end edges of the key are provided with:
A sidebar cylinder lock, wherein a concave hole engaging with a tumbler and a concave step portion engaging with a side pin are formed in the same pattern.