JPS59145873A - Key exchangeable rental strong box lock - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a lock for a safe deposit box installed mainly in banks and the like, and more specifically to a key exchangeable safe deposit box lock.

Conventional general safety deposit boxes have a so-called tumbler set, which has a bank lock that is locked and unlocked using a bank key kept by the bank, and eight locks that are locked and unlocked using a customer key kept by the customer. A double lock is used, and the safe deposit box door cannot be opened unless both locks are unlocked.

In such safe deposit boxes, when the user of the safe deposit box changes, the previous user often creates and retains a spare customer key, so it is necessary to replace the 8 locks from a safety management perspective. There is. There were also cases where eight bank locks had to be replaced due to bank circumstances. In such a case,
Conventionally, the safe deposit box lock was removed from the door and the tumbler was reassembled so that it could be locked and unlocked using a new key.
Or the lock itself was replaced. This work was very time-consuming and undesirable.

SUMMARY OF THE INVENTION An object of the present invention is to overcome the above drawbacks and provide a safe deposit box lock whose key can be easily replaced without removing it from the door. Therefore, the present invention provides a tumbler in which the part including the gate that accommodates the fence provided on the bar running board and the part that abuts the key outlet of the key are formed separately, and these parts are moved and moved relative to each other. The structure is configured so that the gate can be fixedly connected and the distance between the gate and the contact part can be changed according to the key pile of the desired key, so that it can be locked and unlocked with the desired key. This objective was achieved by making it easy to replace the key by rotating the key.

The present invention will be described in detail below according to embodiments shown in the accompanying drawings.

Fig. 1 is a front view 5 of an embodiment of the safe deposit box lock of the present invention, with the presser cover and the tumblers of the eight locks and bank lock removed.
It is. In the figure, 11 is a lock box that is fitted with a bolt, tumbler, etc. and attached to the door of a safe deposit box, 12 and 13 are key holes for replacement keys drilled in the back wall of the lock box 11, and 14 is a lock box. This is a support shaft that is installed on the back wall of No. 11 and rotatably supports an eight-tablet tumbler, which will be described later.

Reference numeral 15 denotes a guide member for the customer key, which is provided with an arm 16 that integrally rotates, and is rotatably supported in a hole bored in the back wall of the lock box 11. Reference numeral 17 indicates a guide wall for guiding the vertical movement of a bank lock tumbler, which will be described later. Reference numeral 18 indicates a guide member for a bank key, which is rotatably supported in a hole bored in the back wall of the lock box 11.

Reference numeral 21 denotes a bolt that is protruded from or retracted from the side wall of the lock box 11, and is integrally formed with the bar running plate 22.
It protrudes when it advances and is retracted when it retreats. When the bolt 21 is projected, it fits into a recess provided in the frame of the safe deposit box main body (not shown) to fix the lock, and when pulled in, the door can be opened and closed freely. Reference numerals 23 and 24 denote a customer lock fence and a bank lock fence respectively provided on the quantity determining plate 22, and these work together with the 8-lock tumbler and the bank lock tumbler to prevent the barrow plate 22 from retreating. Allow.

25 is the key hole 12 when the bolt running plate 22 is in the forward position.
26 is a sliding portion that comes into contact with the arm 16 and advances or retreats the bolt running plate 22 according to the rotation of the arm 16; 27 is a sliding part that is bored parallel to the moving direction of the bolt running plate 22; This long hole 27 is fitted into the support shaft 14 and guides the movement of the bolt running plate 22.

Figure 2 shows an eight-lock tumbler 30 in the lock box 11 shown in Figure 1.
3 is a front view showing the locked state with the bank lock tumbler 60 attached, and FIG. 3 is a front view showing the unlocked state of FIG. -30
, 60 are shown. FIG. 4A is an exploded perspective view of the eight-lock tumbler 30, and FIG. 4B is an exploded perspective view of the bank lock tumbler 60. As is clear from these figures, in this embodiment, a rotary 8-lock tumbler 30 is used for the 8 locks, and a vertically movable bank lock tumbler 60 is used for the bank lock.

31a and 31b are main tumblers; one main tumbler 31a has a dowel hole 32 bored therein, and the other main tumbler 31b has a dowel 33 that fits into the dowel hole 32. There is. A small diameter part is provided at the tip of the flange 33, and by fitting this small diameter part into the hole 32, the main tumbler can be opened.
31a and 31b are maintained at a predetermined interval defined by the height of the large diameter portion. 34a and 34b are gates into which the fence 23 can be inserted; 35a and 35b are gates 34;
a, the position where 34b allows the fence 23 to fit;
That is, it is a hole that aligns with and communicates with the key hole 12 when the eight-lock tumbler 30 is in the unlocked position. 36a, 3
Reference numeral 6b represents a shaft hole for pivotally attaching the main tumblers 31a, 31b to the support shaft 14, and the main tumblers 31a, 31b rotate around these shaft holes 36a, 36b.

A sliding tumbler 41 is slidably inserted between the main tumblers 31a and 3Ib.

The sliding tumbler 41 has an elongated hole 44 for passing through the dowel 33, and the sliding tumbler 41 slides along this elongated hole 44.

42 is a gate that is aligned with the gates 34a and 34b and allows the fence 23 to be inserted therein; 43 is a serrated engagement portion that engages with an engagement portion 53 of a variable tumbler 51 to be described later. The hole 45 faces the holes 35a and 35b, and this hole 45 faces the gates 34a and 34b of the tumbler 30.
When aligned with the fence 23, that is, when the 8-lock tangent rally 0 is in the unlocked position, it communicates with the key LL12. Then, the vertical part of the hole 45 comes into contact with the key thread of the replacement key inserted through the keyhole 12, and the rotation of the replacement key moves the gate 42 in the direction of fitting with the fence 23, and the engaging part 43 and the engaging portion 53 of the variable tumbler 51
is disengaged from the 46 is a sliding tumbler
A spring attached to the variable tumbler 51 has one end abutting against the flange 33 and urges the sliding tumbler 41 to slide in the direction in which the engaging portion 43 engages with the engaging portion 53 of the variable tumbler 51.

51 is a variable tumbler sandwiched between the main tumblers 31a and 3ib similarly to the sliding tumbler 42.
A shaft hole 52 is bored through which the main tumblers 31a and 31b are rotatably attached to the support shaft 14.

53 is a serrated engagement part, and the sliding tumbler 4
1, and is fixed at any position relative to the main tumblers 31a, 31b, and integrated therewith. Reference numeral 54 denotes a contact surface that comes into contact with the key ridge of the customer key, and the variable tumbler 5 changes according to the rotation of the customer key.
Rotate 1. 55 is a spring attached to the variable tumbler 51, and the 8-lock tumbler 3° is attached to the lock box 11 C.
This spring 55 comes into contact with the L wall of the lock box 11, and when the engaging portions 43 and 53 are engaged, the variable tumbler 1' is integrated with the main tumblers 31a and 31[]. Specifically, when these are disengaged, they are biased to rotate independently in the direction of contacting the customer key.

61a and 61b are the main tumblers of the bank lock tumbler 6o, one main tumbler 61a has a dowel hole 62, and the other main tumbler 61b has a dowel 63 that fits into the dowel hole 62. has been planted. The tip of the dowel 3 is also provided with a small diameter tg, similar to the dowel 33 described above.

64a, 64b are gates into which the fence 24 can be inserted, 65a, 65b G & gate 64a,
64b) A position that allows the insertion of the spacer 24,
That is, it is a hole that aligns with and communicates with the key hole 13 when the bank lock tumbler 60 is in the unlocked position. Reference numeral 66 denotes a shaft hole into which a support shaft 67 implanted in the other main tumbler 61b is fitted, and a variable tumbler, which will be described later, is rotatably supported on this support shaft 67. 68a, 68a' and 6
8b and 68b' are the guide wall 17 and the lock box 11, respectively.
This is a guide surface that comes into contact with the inner wall of the bank lock tumbler 60 and guides the vertical movement of the bank lock tumbler 60.

69a and 69b are main tumblers 61a and 61b
One end of the spring attached to the main tumblers 61a and 61b comes into contact with the upper wall of the lock box 11 and urges the main tumblers 61a and 61b to move downward.

A sliding tumbler 71 is slidably inserted between the main tumbler 61a and the main tumbler 6111. The sliding tumbler 71 has a long hole 74.
This long hole 74 is inserted through the dowel 63 to slide along this long hole 74. 72
Reference numeral 73 indicates a gate that aligns with the gates 64a and 64b and allows the fence 24 to be inserted therein, and 73 indicates a serrated engagement portion that engages with an engagement portion 83 of a variable tumbler 81, which will be described later. Reference numeral 75 denotes an E-shaped hole facing the holes 65a and 65b, and this hole 75 communicates with the key hole 13 when the gates 64a and 65b are aligned with the fence 24, that is, when the bank lock tumbler 60 is in the unlocked position. It goes through. Then, the vertical part of the hole 75 comes into contact with the key thread of the replacement key inserted through the key hole 13,
By turning this exchange key, the gate 72 is moved to the fence 24.
The engaging portion 73 and the engaging portion 8
3 is disengaged. 76 is a spring attached to the sliding tumbler 71, one end of which is attached to the main tumbler 6.
The sliding tumbler 7 comes into contact with the dowel 63 of 1b.
1 is urged to slide in the right direction in the drawing, that is, in the direction in which the engaging portion 73 engages with the engaging portion 83 of the variable tumbler 81.

Reference numeral 81 denotes a variable tumbler, which has a shaft hole 82 for rotatably attaching to a support shaft 67 implanted in the main tumbler 61b;
It is provided with a sawtooth-shaped engaging portion 83 that engages with the engaging portion 73 of the sliding tumbler 71. Further, the variable tumbler 81 is fixed at an arbitrary position with respect to the main tumblers 61a and 61b by the engaging portion 83 engaging with the engaging portion 73, and is integrated with the main tumblers 61a and 61b.

Reference numeral 84 denotes a sliding contact portion that slides against the key ridge of the bank key inserted into the guide member 18. 85 is a spring attached to the variable tumbler 81, one end of which is a sliding tumbler.
71 to urge the variable tumbler 81 to rotate counterclockwise in the drawing, that is, in the direction in which the sliding contact portion 84 contacts the bank key.

Although the engaging portions 73 and 83 are shown as linear in this embodiment, if they are formed in an arc shape centered on the support shaft 67,
All the teeth of the engaging portion 83 can be uniformly engaged with the teeth of the engaging portion 73.

Next, the unlocking and locking operations of the safety deposit box lock of the present invention having the above configuration will be explained. This operation is the same as for conventional safe deposit box locks. That is, in the locked state shown in FIG. 2, a bank clerk inserts the bank key 92 into the guide member 18 and rotates it approximately 90 degrees clockwise. During this time, the key thread of the bank key 92 comes into sliding contact with the sliding surface 84 of the variable tumbler 81 to move the bank lock tumbler 60 to the unlocked position, that is, the gate 64a.

64b, 72 and the fence 24 are lifted to a position where they are aligned. Thereafter, the customer inserts the customer key 91 into the key guide member 15 and rotates it approximately 150 degrees clockwise.

At this time, while the customer key 91 is rotated approximately 90 degrees from the locked position, the key thread of the customer key 91 slides into sliding contact with the sliding surface 54 of the variable tumbler 51, and the eight-lock tumbler 30 is inserted into the shaft hole 36a.

36b, 52 as fulcrums until the unlocked position, that is, the gates 34a, 34b, 42 are aligned with the fence 23. While further rotating approximately 60 degrees in the same direction, the arm 16 acts on the sliding surface 26 of the bolt running plate 22 to move the bolt running board 22 backward, and each fence 23.24 is connected to the gate 34a, 34b, 34, and Gates 64a and 64b I are inserted into the knees. This completes the unlocking, and the attendant returns the bank key 92 to the locked position and removes it before the safe deposit box can be used by the customer. When locking, the customer simply returns the customer key 91 to the locked position, and the bolt running board 22 moves forward, opening the fence 2 from the gate of each tumbler 30, 60.
3.24 came off, the gate fell apart, and the bolt running board 2
Prevent 2 from retreating. Now, both the 8 locks and the bank lock are locked.

Next, a key exchange operation method for the safe deposit box lock of the present invention having the above configuration will be described in detail, and this key exchange operation is performed with the door of the safe deposit box open.

First, the key exchange operation for 8 tablets will be explained.

5 to 8 are front views showing only the main parts in the process of key exchange operation for eight locks. A predetermined customer key 91 is inserted into the eight-lock guide member 15 in the locked state shown in FIG. 2, and rotated approximately 90 degrees clockwise from the locked position. Although not shown, it is preferable to mark this position on the front side of the door. The 8-lock tumbler 30G is rotated to the TM lock position, and the hole 45 is aligned with and communicates with the key hole 12, so insert the replacement key 93 into the key hole 12 from the back side of the lock box 11.

(See FIG. 5) After the replacement key 93 is fully inserted into the key hole 12, it is rotated approximately 90 degrees clockwise in the drawing. The key thread of the replacement key 93 comes into contact with the vertical part of the hole 45 and presses it to move the sliding tumbler 41 to the left against the urging force of the spring 46, so that the engaging part 43 and the variable tumbler 51 are moved. The gate 4 is disengaged from the engagement portion 53 of the gate 4.
2 into the fence 23. (See Figure 6) Next,
Return the guest key 91 to the locked position. The variable tumbler 51 rotates with the sliding surface 54 in contact with the key thread of the customer key 91 due to the biasing force of the spring 55, but the sliding tumbler 41 rotates when the gate 42 fits into the fence 23 and the hole 45
Since the upper part of the key is in contact with the exchange key 93, it does not move.

Therefore, the sliding tumbler 41 and the main tumblers 31a, 31b are maintained in the unlocked position. (
(See Figure 7) After returning the guest key 91 to the locked position, pull it out.
Insert the desired new customer key 91' and rotate it again to the position of the mark. The sliding surface 54 of the variable tumbler 51 slides into contact with the key protrusion of the new customer key 91' and rotates according to its height, so that the engaging portion 53 is positioned at a position where it can engage with the engaging portion 43. Sφ. Here, when the replacement key 93 is rotated approximately 90 degrees counterclockwise in the drawing, the sliding tumbler 41 slides to the right by the biasing force of the spring 47, and the engaging portion 43 is moved to the engaging portion of the variable tumbler 51. 53 to fix the variable tumbler 51 to the main tumblers 31a, 31b, thereby completing the 8-lock tumbler 30 corresponding to the new customer key 91'.

(Refer to Fig. 8) When the exchange key 93 is pulled out, the key exchange operation for the 8 locks is completed.
Can be locked.

Next, the bank lock key exchange operation will be explained.

FIGS. 9 to 11 are partial front views showing only the main parts in this operation process. In this embodiment, the bank lock key exchange operation is performed after all eight bank locks are unlocked.

First, as shown in FIG. 3, the bank lock and eight locks are unlocked using a predetermined bank key 92 and customer key 91.

The bolt 21 is pulled in, and the fence 24 is connected to the gate 62a,
62b.

72, 72b, insert the replacement key 93 into the key hole 13t from the back of the lock box 11, and turn it approximately 90 degrees clockwise in the drawing.
Rotate it. The key thread of the replacement key 93 comes into contact with the vertical part of the hole 75 of the sliding tumbler 11, presses it and slides it to the left against the biasing force of the spring 76, thereby connecting the engaging part 73 and the variable tumbler 81. is disengaged from the engaging portion 83. (See Figure 9) After rotating the replacement key 93 in this way, the bank key 92
Return it to the locked position. During this time, the variable tumbler 81 slides on the sliding contact portion 84 around the hole 82 due to the biasing force of the spring 85.
The guide member 18 remains in contact with the key thread of the bank key 92.
However, since the upper part of the hole 75 and the exchange key 93 of the sliding tumbler 71 are in contact with each other, and the gate 72 is fitted to the fence 24, the sliding tumbler 71 does not move and the main tumbler 61a, The unlocked state is maintained together with 61b. (See FIG. 10) When the bank key 92 is removed and a new bank key 92' is inserted into the guide member 18, it is rotated to the unlocked position. Variable tumbler-81
The sliding contact portion 84 slides on the key ridge of this new bank key 92' and rotates according to the height of this key ridge. Next, when the exchange key 93 is rotated approximately 90 degrees counterclockwise in the drawing, the sliding tumbler 11 slides to the right by the biasing force of the spring 75, and the engaging portion 73 is moved to the engaging portion of the variable tumbler 81. 83 to fix the variable tumbler 81, and a bank lock tumbler 60 corresponding to a new bank key 92' is completed. (See FIG. 11) When the replacement key 93 is pulled out, the bank lock key replacement operation is completed, and the bank lock can be unlocked and locked with a new bank key 92'.

FIG. 12 shows one embodiment of the exchange key 93.

This key mountain is shown in its simplest shape,
If necessary, it is also possible to provide unevenness and change the shape of the hole of the sliding tumbler in accordance with the unevenness so that the key exchange operation cannot be performed unless a specific exchange key is used.

In this example, a rotating tumbler is used for the 8 locks, and a vertically movable tumbler is used for the bank lock, but it can be changed freely, such as using a rotating tumbler for both locks. However, the mechanism of the present invention may be applied to only one lock, and the shape of each tumbler may be modified in various ways without departing from the technical idea set forth in the claims. .

As described above, the present invention makes it possible to easily and reliably exchange keys as needed, thereby eliminating the trouble and trouble associated with the conventional methods, and having a great deal of practical advantages.

[Brief explanation of the drawing]

FIG. 1 is a front view of an embodiment of the safe deposit box lock of the present invention, with the presser lid and the tumblers of the eight locks and bank lock removed;
Fig. 2 is a front view showing the embodiment shown in Fig. 1 in a locked state with each tumbler attached, Fig. 3 is a front view showing the embodiment shown in Fig. 2 in an unlocked state, Figs. Fig. 4B is an exploded perspective view of an 8-lock tumbler and a bank lock tumbler, Figs. Figures 11 to 11 are partial front views showing the main parts in the bank lock key exchange operation process;
FIG. 12 is a perspective view showing one embodiment of the replacement key. 12, 13... Key hole 17... Guide wall 3o
...8-tablet tumbler 31a, 31b...Main tumbler 41...Sliding tumbler 43...
Engagement part 51... variable tumbler 53... engagement part
6o...Bank lock tumbler-61a, '61b...
・Main tumbler 71...Sliding tumbler 7
3... Engaging portion 81... Variable tumbler Patent applicant Kumahira Seisakusho Co., Ltd. Figure 10 Figure 12

Claims (7)

[Claims] (1) A metering plate that is installed in the lock box so as to be able to move forward and backward and is formed integrally with the lock to project and retract the core from the lock box; furthermore, when the key is a predetermined key, it aligns with the fence provided on the quantity determining plate and allows the fence to be inserted, causing the quantity determining plate to retreat. a plurality of tumblers equipped with gates that permit , a variable tumbler which is movably attached to the main tumbler and which can engage with the sliding tumbler at any position and move integrally with the main tumbler; each of the main tumblers has: , a hole through which the gate communicates when the predetermined key is moved to an unlocked position that allows insertion of the fence, and a key on the back wall of the lock box that aligns with and communicates with the through hole. one hole is bored, each of the sliding tumblers is always biased to move in the direction of engagement with the variable tumbler, and when each of the main tumblers is in the unlocked position, the key hole is bored. When the exchange key inserted through the communicating hole is rotated, the exchange key is pressed against the key crest of the exchange key and moves, disengaging from the variable tumbler, and each of the variable tumblers corresponds to the key. The sliding tumbler is always biased to move in the direction of contact, and when the sliding tumbler is disengaged, it contacts the key ridge of the key and moves independently in accordance with the rotation of the key, and is moved by the desired key. A safe deposit box lock with a replaceable key, characterized in that the main tumbler can be engaged with the sliding tumbler at a position where the main tumbler can be moved to the unlocked position. (2) The main tumbler and the variable tumbler are rotatably supported on a support shaft provided in the lock box. Safe lock. (3) the main tumbler is supported vertically movably between a side wall of the lockbox and a guide wall provided on the lockbox;
The key-exchangeable safety deposit box lock according to claim 1, wherein the variable tumbler is rotatably supported by the main tumbler. (4) A claim in which the engaging portion of the sliding tumbler and the engaging portion of the variable tumbler are serrated, and the serrated portions are formed along an arc centered around the rotating wheel of the variable tumbler. The key-replaceable safe deposit box lock described in paragraph (2) or (3). (5) Claim (2), wherein the main tumbler is composed of two main tumblers, and the sliding tumbler and variable tumbler are installed between the two main tumblers. Or a key-replaceable money-lending lock as described in paragraph (3). (6) The key-replaceable safety deposit box lock according to claim (1), wherein the sliding tumbler includes a gate that is aligned with the gate of the main tumbler and that can be fitted into the fence. (7) The sliding tumbler has a hole in the shape that matches the hole of the main tumbler, and the key thread of the replacement key is in contact with the vertical part of the eye hole. The key-replaceable safe deposit box lock described in paragraph (6).