JPH09221944A - Tumbler lock - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make it possible to realize a large number of different keys comparatively at a low price. SOLUTION: Instead of forming monlithically a key-way 22 exclusively receiving a specific key 15 in an opening section of a key-hole 14 in a plug 12, mounting sections 21 and 24 for mounting selectively a plurality of key-way plates 23 forming different key-ways 22 in them are formed. The key-way plates 23 selectively formed separately from the plug 12 are fixedly mounted to the mounting sections 21 and 24.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a lock, and more particularly,
A relatively inexpensive combination of a large number of keys and locks, that is,
The present invention relates to a tumbler lock that can set key differences.

[0002]

2. Description of the Related Art In a tumbler lock, a key suitable for the lock is inserted into a cylinder-shaped plug so that a plurality of disc-shaped tumblers or pin-shaped tumblers arranged on the plug can be rotated. It can be held in the moving position. Therefore, when the key is inserted in the plug, the locking operation or the unlocking operation can be performed by rotating the plug integrally with the key between the unlocked position and the locked position.

In such a tumbler lock, a large number of key differences suitable for the tumbler can be set by changing the arrangement, shape and number of each tumbler. Further, in the tumbler lock, in addition to the change of the tumbler, in order to realize a larger number of key differences, the key of such a tumbler lock is generally formed with a key groove,
On the other hand, a keyway is formed in the keyhole of the plug of the tumbler lock so as to correspond to the keyway and exclusively receives the key of the predetermined keyway. Therefore, more key differences can be set depending on the keyway shapes.

[0004]

However, in the conventional tumbler lock as described above, the keyway is integrally formed with the plug of the tumbler lock by casting. For this reason, in order to obtain plugs having different keyway shapes, a number of expensive casting dies corresponding to the number of different keyway shapes are required. A large amount of cost is required to prepare multiple types of this expensive mold, and these include the management of multiple types of molds and multiple types of plugs, in order to provide a large number of different key tumbler tablets at low cost, It was a big obstacle. Then, the objective of this invention is providing the tumbler lock which can implement | achieve many key differences comparatively cheaply.

[0005]

The present invention adopts the following constitution in order to solve the above points. <Structure> In the tumbler lock according to the present invention, instead of integrally forming a keyway that exclusively accepts a predetermined key in the opening of the keyhole of the plug, a plurality of keyway plates having different keyways are selected. And a keyway plate, which is formed separately from the plug and is selected, is fixedly attached to the attachment portion.

As a concrete structure of the mounting portion in the tumbler lock of the present invention, a recess is formed in the end surface of the plug so as to receive the keyway plate, and the keyway of the keyway plate of the keyway plate housed in the recess is formed. It is desirable to secure the keyway plate to the plug by a cap member that is placed over the keyway plate to allow insertion and is secured to the end face of the plug.

In the tumbler lock of the present invention, since the keyway is formed separately from the plug and is defined by the selected keyway plate, it is not necessary to integrally form the keyway in the plug as in the conventional case, and The shape of the keyway can be changed by selecting the attached keyway plate. Therefore, even if the plug is formed by a single mold, the keyway can be changed by changing the keyway plate attached to the plug, and therefore, many types of casting dies and their management are required. Without using a single-shape plug casting mold, a large number of different key tumbler locks can be provided due to the different key groove shapes.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the illustrated embodiments. <Specific Example 1> FIG. 1 shows a first tumbler lock according to the present invention.
It is a perspective view which decomposes | disassembles and shows a specific example. The tumbler lock 10 shown in FIG. 1 is an example of a so-called disc tumbler type tumbler lock in which a large number of tumblers 13 for restricting rotation of a plug 12 rotatably housed in a housing 11 are constituted by plate members.

A tumbler 13 is housed in the plug 12 of the tumbler lock 10 so as to project in the radial direction of the plug 12. Each tumbler 13 is in a rotational position that allows the rotation of the plug 12 corresponding to the shape of the key mountain 16 formed in the key 15 inserted into the key hole 14 of the plug 12, as in the conventional disc tumbler lock. It can be retracted to the retracted position in the plug 12.

A pair of locking grooves 18 and 19 for receiving the tumblers 13 projecting from the plug 12 are formed at the edges of the circular holes 17 for receiving the plug 12 of the housing 11 which are located diametrically to each other. One locking groove 18 receives the protruding ends of all the tumblers 13 in the protruding position as shown in FIG.
The rotation of 2 is blocked to hold the plug 12 in its unlocked position. In the unlocked position, the plug 12 holds the bart, which is connected to the connecting portion 12A through a thumb turn hub (not shown), in the unlocked position, as is well known in the art. Further, the other locking groove 19 receives the protruding end portion of the tumbler 13 protruding from the plug 12 which is rotated 180 degrees by the key 15, so that the plug 12 is at the locking position where the bar is held at the locking position. Hold.

The keyhole 14 for receiving the key 15 formed in the plug 12 is a keyway 2 formed in the key 15.
It is a rectangular common hole defined by a combination of four straight edge portions for receiving a key 15 having a predetermined plate thickness, regardless of the shape of 0. A rectangular recess 21 is formed at the opening of the key hole 14, that is, the end surface of the plug 12 so that the center coincides with the key hole 14, and the key hole 14 is opened at the center of the recess 21. The rectangular keyhole 14 and the plug 12 in which the recess 21 is formed in the opening thereof can be formed by casting using a casting mold similar to the conventional one.

The recess 21 has a keyway plate 23 having a keyway 22 having a shape corresponding to the keyway 20 of the key 15.
The keyway 22 is housed with the keyway 22 substantially aligned with the keyhole 14. The keyway plate 23 can be obtained, for example, by pressing a stainless plate. The keyway plate 23 allows only the key 15 having the keyway 20 having a shape corresponding to the keyway 22 to be inserted, and prevents the key 15 having the keyway 20 having another shape from being inserted.

A keyway plate 23 housed in the recess 21
Are covered with a cap member 24. A rectangular opening 25 that exposes the keyway 22 is formed in the cap member 24 so as to substantially coincide with the keyhole 14, and the key 15 can be inserted into the keyway 22 through the opening 25. The cap member 24 is fixed to the plug 12 by, for example, caulking, and by fixing the cap member 24, the keyway plate 23 is fixedly attached to the attachment portion including the recess 21 and the cap member 24. For fixing the keyway plate 23, a fixing means such as an adhesive can be appropriately adopted as necessary, and the keyway plate 23 can be directly fixed to the plug 12.

FIG. 2 is a cross-sectional view of the tumbler lock 10 shown in FIG. Each tumbler 13 has an insertion hole 26 that allows the key 15 to be inserted therethrough. Each tumbler 13
As is well known in the art, is subjected to the biasing force toward the above-mentioned protruding position by the spring force of the compression coil spring 27. The tumblers 13 are formed, for example, so that the insertion holes 26 have different height positions. The key 15 having the key mountain 16 having a shape corresponding to the height position of the insertion hole 26 of each tumbler 13 is
When it is inserted into the keyhole 14 through the keyway 22 of FIG.
As shown in, all tumblers 13 are plug 1
It is held in a rotation position that allows rotation of 2.

Therefore, with the key 15 inserted, the plug 12 is rotated between the unlocked position defined by the locking groove 18 and the locked position defined by the locking groove 19 by rotating the key 15. When the key 15 is pulled out from the key hole 14 at the locking position corresponding to the locking groove 19, the protruding end of the tumbler 13 is engaged with the locking groove 19 to lock the tumbler lock 10. Can be placed at Also, at the unlocked position corresponding to the locking groove 18, the key 15 is inserted into the keyhole 1
By pulling out from the tumbler 4, the protruding end of the tumbler 13 can be engaged with the locking groove 18 and the tumbler lock 10 can be opened.

In the tumbler lock 10 according to the present invention, as in the conventional case, the number of the tumblers 13 arranged, the number of arrangement intervals, and the height position of the insertion hole 26 are changed so that the key 15 has the corresponding key mountain 16. The number of combinations, that is, the number of key differences can be set to, for example, 130 types. Furthermore, in the tumbler lock 10 according to the present invention,
As described above, the keyhole 14 of the plug 12 has the keyway 20.
Regardless of the shape of the key, the keyway plate 23 disposed in the opening of the keyhole 14 receives the key 15 having a predetermined plate thickness, and the keyway plate 2 has a shape corresponding to the keyway 22.
Since only the key 15 having 0 is exclusively accepted, by combining a plurality of keyway plates 23 on which different keyways 22 are formed, the value of the key difference obtained by changing the tumbler 13 can be further increased.
By preparing the key differences multiplied by the number of 3 types, for example, 10 types of keyway plates 23, 1300 types of key differences can be set even if the plug 12 having a single shape is used.

FIG. 3 is a perspective view showing another example of the keyway plate. Each of the keyway plates 23 shown in FIGS. 3A to 3D is formed with a keyway 22 having a shape different from that of the keyway 22 of the keyway plate 23 shown in FIG. The keyway 22 in the shape of can be applied. Therefore, a plurality of keyway plates 23 having different keyways 22 are plugged into the plug 1
By selectively attaching to 2, it is possible to define different keyways without the need for multiple casting dies for the plug 12, even with a single casting die. , More key differences than the key differences obtained by changing the tumbler 13 can be set.

<Specific Example 2> FIG. 4 is a longitudinal sectional view showing a specific example in which the present invention is applied to a pin tumbler lock. In the pin tumbler lock 10, as shown in FIG. 4, a plug 12 which is an inner cylinder in which a keyhole 14 is formed, and a plug 12
A housing 11 that is an outer cylinder that rotatably accommodates
A plurality of aligned guide holes 28 for accommodating the pin-shaped tumblers 13 are formed so as to extend in the radial direction of the plug 12 and open to the keyhole 14. Each of the guide holes 28 has a top pin 13a and a bottom pin 1
The pin tumbler 13 divided into 3b is accommodated,
Both pins 13a and 13b receive the spring force of the compression coil spring 27 housed in each guide hole 28.

When the suitable key 15 is inserted into the keyhole 14, the pin-shaped tumblers 13 are pushed up along the key ridges 16 of the key 15 against the spring force of the compression coil spring 27. As a result, as shown in FIG. 4, the top pin 13a and the bottom pin 1 of each tumbler 13 are
The shear line which is a dividing line with 3b is the plug 12
Since it is held at the rotation position that coincides with the boundary line between the housing 11 and the housing 11, the rotation of the plug 12 is allowed between the unlocked position and the locked position, as in the tumbler lock 10 shown in FIG. Be done.

This pin tumbler type tumbler lock 10
Then, as in the disk tumbler type tumbler lock 10 shown in FIG. 1, a keyway plate 23 having a keyway 22 corresponding to the keyway 20 of the key 15 is provided with a recess formed in the opening of the keyhole 14 of the plug 12. It is fixedly provided on a mounting portion including a place 21 and a cap member 24. In the pin tumbler type tumbler lock 10, the key difference can be set by changing the dividing position of the pins 13a and 13b of each tumbler 13, for example. However, by changing the keyway plate 23 attached to the plug 12, the keyway 22 Since it is possible to change the keyway, it is possible to set a large number of key differences due to the difference in the shape of the key groove even if a plug of a single shape is used without using many types of casting molds for changing the keyway. be able to.

In the above description, an example in which the present invention is applied to a tumbler lock in which the tumbler has a disk shape or a pin shape has been described. The present invention can be applied to a dimple type tumbler lock in which a recess is formed, instead of the magnet type tumbler lock that controls the movement of the tumbler by the magnetic force of 1 or the key crest 16 of the key.

[0022]

As described above, according to the present invention, since the keyway is defined by the selected keyway plate which is formed separately from the plug, the plug is formed by a single casting mold. Even so, the keyway can be changed by replacing the keyway plate attached to this plug, which eliminates the need for many types of expensive molds and their management, and allows the plug to have a single shape. Even if a casting mold is used, many tumbler locks with different key shapes can be obtained due to the difference in the shape of the key groove, and by combining with changes in the number of tumblers, their arrangement and shape, etc. The key difference can be realized at low cost.

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing a first specific example of a tumbler lock according to the present invention.

FIG. 2 is a cross-sectional view of the first specific example shown in FIG.

FIG. 3 is a perspective view showing another example of the keyway plate of the first specific example shown in FIG.

FIG. 4 is a longitudinal sectional view showing a second specific example of the tumbler lock according to the present invention.

[Explanation of symbols]

 10 tumbler lock 12 plug 13 (13a, 13b) tumbler 14 keyhole 15 key 20 keyway 21, 24 (recess, cap member) attachment part 22 keyway 23 keyway plate

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[Procedure amendment]

[Submission date] March 4, 1996

[Procedure amendment 1]

[Document name to be amended] Drawing

[Correction target item name] Fig. 4

[Correction method] Change

[Correction contents]

FIG. 4

Claims (2)

[Claims] 1. A tumbler lock comprising a plug provided with a key hole, the plug provided with a tumbler which is held at a rotation position allowing rotation of the plug corresponding to a key inserted into the key hole. In the opening of the keyhole of the plug, a mounting portion for selectively mounting a plurality of keyway plates each having a keyway for exclusively receiving a key having a corresponding key groove is formed and selected. A tumbler lock, wherein a keyway plate is fixedly attached to the attachment portion. 2. The mounting portion allows a recess formed in an end surface of the plug to receive the keyway plate and insertion of the key into the keyway of the keyway plate housed in the recess. The tumbler lock according to claim 1, further comprising a cap member that is disposed so as to cover the keyway plate and is fixed to an end surface of the plug.