JP2020111962A - Changeable pin cylinder lock - Google Patents

Abstract

To provide a changeable pin cylinder lock that can easily disable locking/unlocking operation for an initial duplicate key that is used when construction for a house, an apartment building, or the like is performed.SOLUTION: The changeable pin cylinder lock comprises: an inner cylinder 3 with a key hole 2, rotatably fitted into an outer cylinder 4; and multiple tumbler pins, which include respective lower pins 6 having respective different lengths and protruding into the key hole 2, respective counter pins 7, and respective coil springs 8. At least one lower pin 6 comprises a top pin and a bottom pin. The top pin has an umbrella-like tapered surface on an upper end side, and is fitted with a positioning spring near a lower end. The bottom pin is provided with multiple grooves fitted with the positioning spring and arranged at a predetermined interval in an inner surface of a hole inserted with the lower end of the top pin. The changeable pin cylinder lock has a changeable tumbler pin structure in which a length of each lower pin 6 can be shortened when the top pin is inserted into the bottom so that the positioning spring is fitted into a top groove to set the lower pin into an initial length, and locking/unlocking operation is performed using a changeable key.SELECTED DRAWING: Figure 2

Description

INDUSTRIAL APPLICABILITY The present invention can be used by being attached to a door of a detached house and an entrance of each condominium, industrial equipment, or a door of an important storage such as a door of a safe or a locker. The present invention relates to a pin cylinder lock.

In particular, condominium builders often differ between the builder of the frame work and the builder of the interior work, and when performing the interior work, install the door with a lock attached to each door. It is usually done. As for the interior work, a contractor different from the construction work of the built-in storage shelves and the construction of the closet storage space, and the installation work of kitchen utensils such as sinks, gas basins, and bathtubs is specified. The electrical contractor who will install the equipment will be separately designated for the construction work. In this case, it is usual to give a duplicate key for each room to each contractor so that the construction worker can freely go in and out until the completion of the construction. However, it cannot be said that the management of the keys is thoroughly managed by these plural traders, and it is possible to assume a situation in which the duplicate key is illegally created. Therefore, a variable pin cylinder lock has been developed.

As this type of variable pin cylinder lock, a plurality of cylinder locks are known in the related art. For example, as a first known technique, an outer cylinder provided with a first pin hole extending in the radial direction and a second pin hole inserted in the outer cylinder so as to be rotatable coaxially and extending in the radial direction are provided. An inner cylinder, a first pin housed in the first pin hole, a spring for urging the first pin in a direction toward the axes of the outer cylinder and the inner cylinder, and a second pin hole housed in the second pin hole. A second pin that is biased in the direction toward the shaft by the spring via the first pin when the inner cylinder rotates and the first pin hole and the second pin hole are aligned. And the length of the second pin can be continuously changed and adjusted, and a key is inserted into the inner cylinder to push the second pin back to the outer cylinder side, so that the first pin and the second pin A variable pin cylinder lock characterized in that it is unlocked when the boundary is located at the shear line (Patent Document 1).

According to the variable pin cylinder lock according to the first known technology, since the pin length can be continuously changed, an innumerable number of cylinder numbers can be compared with the conventional code change by attaching and detaching the variable code pin. It is possible to generate.

A second known technique is to specify at least one tumbler pin of a tumbler pin controlled by a duplicate key as a conversion pin, and insert at least one adjustment tumbler pin between the conversion pin and a corresponding driver pin. At the same time, the specified angular position in the direction opposite to the unlocking direction of the inner cylinder is specified as the conversion angular position, and the conversion key with the rotation control release mechanism provided on the previous key is inserted into the key hole at the key insertion angle position. Then, rotate the inner cylinder to the conversion angle position, remove the conversion key at this angle position, and insert a new duplicate key with a different key depression depth corresponding to the conversion pin into the keyhole. A variable pin cylinder lock characterized in that the joint between the tumbler and the driver pin is aligned with the shear line (Patent Document 2).

According to the variable pin cylinder lock according to the second known technique, the inner cylinder cannot be rotated to the conversion angle position by the normal key combination, so that there is a disadvantage that the key difference is changed by the locking/unlocking operation by the normal key combination. Also, by removing the conversion key at the conversion angle position and inserting a new duplicate key, the adjustment tumbler is moved to the pin hole on the inner cylinder side or outer cylinder side, thus converting the key difference easily and reliably. It can be done.

Japanese Unexamined Patent Publication No. 2007-247336 Japanese Unexamined Patent Publication No. 2008-57193

In the variable pin cylinder lock according to the first known art, the shaft attached to the movable part of the tumbler pin can be freely changed by the motor of the control device by a professional manufacturer before the door is attached. It is impossible to change the length of the pin of the pin cylinder lock while it is attached to the door, and there is a problem that it can be freely opened and closed by an illegally duplicated duplicate key.

In the variable pin cylinder lock according to the second known technology, an extra adjustment tumbler and a conversion key obtained by removing the rotation control recess from the existing key are required, and a predetermined direction in the direction opposite to the unlocking direction of the inner cylinder is required. Since it is necessary to specify the angular position of as the conversion angular position, there is a problem that the entire structure is complicated and the operability for conversion is poor.

In order to solve the above problems, the present invention locks/unlocks a second key and subsequent keys with the pin cylinder lock attached to the door, so that the previously used key can be locked. An object of the present invention is to provide a variable cylinder lock that can be sequentially disabled.

As a concrete means for solving the above-mentioned problems, the present invention rotatably fits an inner cylinder having a keyhole into the outer cylinder, and projects into the keyhole to form a plurality of lower pins, counter pins and coil springs having different lengths. Variable pin cylinder lock in which a tumbler pin is provided, wherein a lower pin of at least one tumbler pin of the tumbler pin is formed of a top pin, a bottom pin and a positioning spring, and the top pin has an umbrella shape at the upper end side. The positioning spring is fitted into a slit-shaped groove formed in a taper surface and formed in the circumferential direction near the lower end, and the bottom pin is provided with a hole having a size into which the lower end of the top pin is inserted. A plurality of arcuate grooves are formed on the inner peripheral surface at required intervals, the top pin is inserted into the bottom pin, and the positioning spring fits in the arcuate groove on the upper part, and the length of the lower pin is set to the initial length. The variable pin cylinder lock is characterized in that it is a variable tumbler pin in which the length of the lower pin can be shortened in stages by locking and unlocking with a plurality of convertible keys. Is.

In the above invention, after the initial length of the lower pin is shortened stepwise, locking/unlocking with a previously used key is disabled; and a plurality of variable tumbler pins are provided; Is included as an additional requirement.

According to the variable pin cylinder lock according to the present invention, the structure is simple, and the function of the pin cylinder lock can be easily converted step by step with at least the second key or a convertible key thereafter, and the return can be made. Anything with a rear key can be locked/unlocked, and with the variable pin cylinder lock still attached to the door, it can be locked/unlocked with the initial key or the previous key. It has various excellent effects that the functions can be converted so that the operation cannot be performed.

It is a front view of the variable pin cylinder lock which concerns on embodiment of this invention. It is sectional drawing which follows the AA line of FIG. It is a side view which expanded the lower pin of a variable tumbler pin and which showed a part in section. The lower pin is disassembled, and (a) is a top view of each, (b) is a side view of each, and only the bottom pin is shown in cross section. It shows only the main part of the key used for the variable pin cylinder lock, (a) shows the first key, (b) shows the second convertible key, (c). The figure is an enlarged side view of the essential part showing the third convertible key. It is sectional drawing which shows the state which used the 1st initial key for the same variable pin cylinder lock. It is explanatory drawing for demonstrating the principle of locking/unlocking with the initial key in the same variable pin cylinder lock, (a) figure shows a locked state, (b) figure shows the state with the initial key attached. The figure (c) shows the state in the process of unlocking with the initial key. It is sectional drawing which shows the state which used the 2nd convertible key for the same variable pin cylinder lock. It is explanatory drawing for demonstrating the variable principle of locking/unlocking with the 2nd convertible key in the same variable pin cylinder lock, and (a) figure shows the state which inserted the convertible key, The figure (b) shows the state in the middle of unlocking with the convertible key, and the figure (c) shows the state where the initial key is inserted into the key hole after locking/unlocking with the convertible key.

The present invention will be described in detail based on the illustrated embodiments.
First, in the variable pin cylinder lock 1 shown in FIGS. 1 and 2, an inner cylinder 3 having a keyhole 2 is rotatably fitted in an outer cylinder 4, and a keyhole is provided between the inner cylinder 3 and the outer cylinder 4. A plurality of tumbler pins 5 are arranged so as to project to 2, and each tumbler pin is composed of a lower pin 6, a counter pin 7 (upper pin) and a coil spring 8 having different lengths, and the upper end of the coil spring 8 is a spring. The tumbler pin 5 is supported by the pressing lid 9 and is always pressed in the keyhole 2 direction. The boundary position between the inner cylinder 2 and the outer cylinder 4 is the shear line X.
Among these tumbler pins, at least one tumbler pin close to the opening side of the keyhole 2, preferably two tumbler pins up to the second, are set as the variable tumbler pin 10.

The structure of this variable tumbler pin 10 is the same as having the counter pin 7 and the coil spring 8 similarly to the tumbler pin 5, and the structure of the portion corresponding to the lower pin 6 that abuts on the counter pin 7 is different. That is, as shown in FIGS. 3 and 4, the lower pin 6 is composed of a top pin 11, a bottom pin 12, and a positioning spring 13. The top pin 11 has an umbrella-shaped tapered surface 11a at the upper end thereof and a top portion thereof. Is formed on the contact plane 11b having a small area, and a slit-like groove 11c is formed in the circumferential direction near the lower end. The bottom pin 12 is provided with a hole 12a having a size into which the lower end side of the top pin 11 is inserted, and a plurality of (four in the illustrated embodiment) arc-shaped grooves 12b are formed on the inner peripheral surface of the hole 12a at a required interval. Are formed, and switching (conversion) can be performed a plurality of times (4 steps).

The positioning spring 13 is formed by forming a wire-shaped spring into a circular shape and removing a part of the wire-shaped spring to open the whole so as to reduce the diameter. The positioning spring 13 is provided in the slit-shaped groove portion 11c of the top pin 11. They are engaged with each other with a margin (reducible in diameter). For example, when the top pin 11 is inserted into the bottom pin 12, the positioning spring 13 is first fitted (engaged) in the groove 12b of the first stage for positioning. Then, the length of the lower pin 6 is set.

The keys used to open and close the variable pin cylinder lock 1 are three different keys shown in FIGS. 4A, 4B, and 4C, that is, the first initial key 14 and the second convertible key. The key 15 and the third key 16 that can be converted if necessary (for example, when the second key 15 may be lost) will be described. The difference between the initial key 14 and the convertible keys 15 and 16 is only the depth of the depressions 14a, 15a and 16a at the abutting position of the variable tumbler pin 10 described above, and the other tumbler pins 5. The abutting depressions are formed in the same manner with a required step. The second variable tumbler pin also uses the same top pin 11, bottom pin 12, and positioning spring 13 as the variable tumbler pin having the above-described configuration, and the engagement position between the top pin 11 and the bottom pin 12 is By making them different, it is possible to further change in two steps and three or more steps. In that case, the depth (position) of the key to be used may be changed. For example, if the number of bottom pin grooves 12b of the first tumbler pin (4 rows) and the number of bottom pin grooves 12b of the second tumbler pin (3 rows) are the total (7 steps), the number of conversions is possible. Will be. Needless to say, the first to seventh keys are required according to the number of times conversion is possible.

Next, an actual conversion example will be described with reference to FIGS. The first initial key 14 is given to a contractor who performs interior work so that it can freely enter and leave the room during the interior work. In this case, as shown in FIGS. 6 and 7(a), Before inserting the initial key 14, the ends of the counter pins 7 of all the tumbler pins are beyond the position of the shear line X. However, when the initial key 14 is inserted into the variable pin cylinder lock 1, as shown in FIG. ), the ends of the counter pins 7 of all the tumbler pins including the variable tumbler pin 10 are aligned with the shear line X, and the inner cylinder 2 is rotated as shown in FIG. 7(c). Since it can be locked and unlocked by the operator, the workers in the interior work can freely go in and out.

Further, when the first initial key 14 is returned from the contractor after the interior construction work is completed, and the condominium seller reaches the stage of handing over the key to the property sold to the individual, for example, FIG. 8 and FIG. As shown in FIG. 9(a), when the second convertible key 15 is inserted into the variable pin cylinder lock 1, since the recess 15a is shallow, the variable tumbler pin 10 is pushed deeply, and the counter pin is placed at the position of the shear line X. 7, the taper surface 11a of the top pin 11 is located.

Even in this state, the second convertible key 15 can be rotated. Therefore, when the key 15 is rotated in the unlocking or locking direction, as shown in FIG. 4. The top pin 11 is pushed into the bottom pin 12 by slipping at the boundary with 4, and the positioning spring 13 is reduced in diameter and fits and engages with the next arcuate groove 12b, and the top pin 11 and the bottom pin 12 are formed. The length of the lower pin 6 is shortened, so that the variable pin cylinder lock 1 is converted while being attached to the door.

After that, if the second convertible key 15 is used, the lower end surface of the counter pin 7 is aligned on the shear line X, and the variable pin cylinder lock 1 can be locked/unlocked like other tumbler pins. .. When the length of the lower pin 6 is shortened in this way, the counter pin 7 is located beyond the shear line X even if the first initial key 14 is used, as shown in FIG. 9C. The lock/unlock cannot be performed, and even if the person involved in the interior construction illegally forms the duplicate key with the first initial key 14, it cannot be used thereafter.

With the variable pin cylinder lock 1 still attached to the door in this way, for example, even if there is a duplicate key used for interior work, the second convertible key 15 is used to lock or unlock. By locking, it is possible to immediately change the function of the cylinder lock and disable the use of other duplicate keys.

In a variable pin cylinder lock 1 according to the present invention, an inner cylinder 3 having a keyhole 2 is rotatably fitted into an outer cylinder 4 and protruded into the keyhole 2 so that a lower pin 6, a counter pin 7 and a coil spring 8 each having a different length. Is a variable pin cylinder lock in which a plurality of tumbler pins 5 are provided, and at least one lower pin 6 of the tumbler pins is formed of a top pin 11, a bottom pin 12, and a positioning spring 13. The top pin of the top pin is formed in a tapered surface 11a having an umbrella shape, the positioning spring 13 is fitted in a slit-shaped groove portion 11c formed in the circumferential direction near the bottom end, and the bottom pin 12 is the bottom end of the top pin. A hole 12a having a size that allows the portion side to enter is provided, a plurality of arc-shaped grooves 12b are formed on the inner peripheral surface of the hole at a required interval, and the top pin 11 is inserted into the bottom pin 12 and the positioning spring 13 is placed above. The lower pin 6 is fitted in the arc-shaped groove 12b of the above and the length of the lower pin 6 is set to an initial setting, and the lower pin 6 is locked/unlocked by the second and subsequent convertible keys 15 and 16. By making the variable tumbler pin 10 capable of gradually shortening the length of 6 in order, for example, when the key being used is lost or when the resident changes in a rental house, etc., the door The function of the variable pin cylinder lock 1 can be changed step by step with the second and subsequent plural convertible keys without replacing the body part of the cylinder lock attached to the variable pin cylinder lock 1. With the door attached to the door, the lock/unlock operation cannot be performed with the initial duplicate key or the previously used key. Is.

1 Variable Pin Cylinder Lock 2 Key Hole 3 Inner Cylinder 4 Outer Cylinder 5 Tumbler Pin 6 Lower Pin 7 Counter Pin 8 Coil Spring 9 Spring Holding Lid 10 Variable Tumbler Pin 11 Top Pin 11a Tapered Surface 11b Abutment Plane 11c Slit-like Groove 12 Bottom Pin 12a Hole 12b Arc-shaped groove 13 Positioning spring 14 1st initial key 14a, 15a, 16a Dimple 15 2nd convertible key 16 3rd convertible key X Shearline

Claims (3)

A variable pin cylinder lock in which an inner cylinder having a key hole is rotatably fitted in an outer cylinder, and a plurality of tumbler pins each having a lower pin, a counter pin, and a coil spring having different lengths are provided so as to protrude from the key hole. hand,
The lower pin of at least one tumbler pin of the tumbler pin is formed of a top pin, a bottom pin and a positioning spring,
The top pin has an umbrella-shaped tapered surface on the upper end side, and the positioning spring is fitted into a slit-shaped groove formed in the circumferential direction near the lower end.
The bottom pin is provided with a hole having a size into which the lower end side of the top pin is inserted, and a plurality of arc-shaped grooves are formed on the inner peripheral surface of the hole at a required interval.
The top pin is inserted into the bottom pin, and the positioning spring is fitted into the upper circular groove to set the length of the lower pin to an initial length.
A variable pin cylinder lock characterized in that it is a variable tumbler pin that can shorten the length of the lower pin stepwise by performing locking/unlocking operations with a plurality of convertible keys. The variable pin cylinder lock according to claim 1, wherein after the initial length of the lower pin is gradually shortened, locking/unlocking with a previously used key is disabled. The variable pin cylinder lock according to claim 1, wherein a plurality of the variable tumbler pins are provided.

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