JPH0424510B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a key-replaceable lock in which the locking/unlocking key can be arbitrarily replaced.

[Prior Art] Various types of locks with replaceable keys have been proposed so far. For example, there is an earlier patent application (Japanese Patent Application No. 117552/1982) filed by the applicant of the present application.

[Problem to be solved by the invention] Conventional locks with replaceable keys have complicated mechanisms, and therefore may not operate smoothly unless manufacturing precision is improved, especially in the case of double locks. The problem was that the assembly was complicated and the manufacturing cost was high.

The present invention aims to simplify the mechanism to ensure reliable operation, and to facilitate assembly by reducing the number of parts.

[Means for Solving the Problems] In order to achieve the above object, the present invention includes two types of tumblers: a sliding tumbler that prevents/allows the retraction of the bar; and a sliding tumbler that is activated by key operation. It is composed of a variable tumbler that engages at any relative position and operates integrally, the variable tumbler is rotatably supported on a fixed shaft, and the sliding tumbler is rotatable and slidable by a guide member. It supports and guides the sliding tumbler and urges it in the direction of integration with the variable tumbler, and when all the sliding tumblers are in the unlocked position, the sliding tumbler and the variable tumbler can be separated and combined using the conversion key. did.

[Function] In the key-replaceable lock of the present invention, when a predetermined key is inserted into the lock and rotated in a predetermined direction, the gate provided on the sliding tumbler moves to a position that allows the fence to retreat. At the same time, one of the keys acts on the running board to move the bolt back together with the running board and unlock the lock.

When a predetermined key is rotated in a direction opposite to the predetermined direction, the key acts on the running plate and moves the bolt forward together with the running plate to lock the door.At the same time, the sliding tumbler rotates and the gate is opened. Move to a position to block Fuence's retreat.

In the unlocked state, insert the conversion key into the lock,
When it is rotated in a predetermined direction, the conversion key acts on the guide member to separate the engaging portions between the sliding tumbler and the variable tumbler, thereby freeing the variable tumbler to rotate. When the new key is inserted into the lock and rotated in a predetermined direction, the variable tumbler moves to the position corresponding to the new key.
When the conversion key is rotated in a direction opposite to the predetermined direction, the sliding tumbler is guided by the guide member and engages with the variable tumbler at the changed position of the engaging portion. From then on, it can only be unlocked with the new key.

[Examples] The present invention will be described in detail below with reference to preferred embodiments shown in the accompanying drawings.

The accompanying drawings show a preferred embodiment of the double lock, and FIG. 1 is a front view showing the inside of the lock box with the tumbler removed.

10 in the figure is a lock box main body, and this lock box main body 10
The tumbler is provided with a conversion key hole 12 bored in the back wall and a support shaft 14 implanted in the back wall for pivotally supporting the tumbler.

20 is a flat guide member, which is connected to the lock box main body 1.
A spring 28 and a pin are fitted into a groove formed in the back wall of 0, and are supported and guided by this groove so as to be able to move laterally, and are further fitted into a hole laterally bored in the left side wall of this groove. 30 to the right. A conversion hole 22 is bored in the guide member 20 at a position aligned with the conversion key hole 12, and furthermore, an actuation shaft 24 and a guide shaft 26 are provided at the front side spaced apart laterally.
has been planted.

32 is a bolt, which is formed integrally with the running plate 34. A fence 36 is formed on the running board 34,
Furthermore, it fits into the support shaft 14, the operating shaft 24, and the guide shaft 26, and the running plate 34 moves forward and backward (lateral movement).
A long hole is bored to guide the guide member 20 and allow movement of the guide member 20.

16 and 18 are a customer key guide member and a bank key guide member. The customer key guide member 16 is integrally formed with an arm that moves the running plate 34 forward and backward to project and retract the lock 32.

FIGS. 2A and 2B show an exploded view of the tumbler attached to the lock shown in FIG. 1. 40
a and 60a are sliding tumblers and variable tumblers for customer locks, and 40b and 60b are sliding tumblers and variable tumblers for bank locks. sliding tumbler 40a,
Gates 42a and 42 at the left end cooperate with the fence 36 to prevent and allow the running board 34 to retreat.
b, and the conversion key hole 12 when the gates 42a and 4b are in the unlocked position that allows entry of the fence 36.
Conversion holes 44a, 44b having a shape that aligns with the cylindrical shape to allow insertion of the conversion key, grooves 46a, 46b that fit into the operating shaft 24, and grooves 4 that fit into the guide shaft 26.
8a, 48b, and engaging portions 50a, 50b having a plurality of sawtooth-shaped projections and depressions that protrude downward. Grooves 46a and 46b guide the rotational movement of sliding tumblers 40a and 40b, and grooves 48
a, 48b are sliding tumblers 40a,
40b in the horizontal direction. The sliding tumbler 40a and the sliding tumbler 40b have the engaging portion 50a at the left end, and the engaging portion 50a at the left end.
The difference is that b is provided near the center, but otherwise they are basically the same.

The variable tumblers 60a, 60b have lever portions 64a, 6 having lower surfaces that come into sliding contact with the key peaks of the keys.
4b, engaging parts 62a, 62b having a plurality of saw-blade-shaped unevenness that engages with the unevenness of the engaging parts 50a, 50b on the left ends of the lever parts 64a, 64b, Shafts 66a, 66 that are fitted and rotate around this support shaft 14
b, and springs 68a, 68b attached near the shaft holes 66a, 66b. lever 64a,
The length of 64b is set to correspond to the positions of engaging portions 50a and 50b.

Figure 3 shows the lock shown in Figure 1 with Figures 2A and 2.
It is a front view showing the unlocked state of the tumblers 40a, 60a and tumblers 40b, 60b shown in Fig. B, which are alternately stacked and mounted.

As is clear from the drawings, in the tumblers 40b and 60b, the groove 46b is fitted into the operating shaft 24, the groove 48b is fitted into the guide shaft 26, and the shaft hole 66b is fitted into the support shaft 14. Then, the engaging portion 50b and the engaging portion 62b are engaged to integrate the sliding tumbler 40b and the variable tumbler 60b, and the integrated tumblers 40b, 60b rotate about the support shaft 14. The other end of the spring 68b is the lock box body 10
The tumblers 40b, 60 are in contact with the upper inner wall surface of the
b is biased to rotate counterclockwise, that is, to the locked position. Since the sliding tumbler 40b rotates around the support shaft 14 in this manner, the grooves 46b and 48b are formed in an arc shape around the support shaft 14.

Tumblers 40a and 60a are tumblers 40
Although the details are not shown because it is located below the tumblers 40b and 60b, it is attached in the same manner as the tumblers 40b and 60b. That is, the groove 46a is connected to the operating shaft 2.
4, the guide shaft 26 is fitted into the groove 48a, and the support shaft 14 is fitted into the shaft hole 66a, respectively. Then, the engaging portion 50a and the engaging portion 62a engage with each other, and the sliding tumbler 40a and the variable tumbler 60a
A tumbler 40 that is integrated with
a, 60a rotate around the support shaft 14.
The grooves 46a and 48a are formed in an arc shape centered on the support shaft 14. The other end of the spring 68a comes into contact with the upper inner wall surface of the lock box body, and the tumblers 40a, 6
0a is urged to rotate counterclockwise, that is, to the locked position.

The operating surfaces of each lever portion 64a, 64b are located above the customer key guide member 16 and the bank key guide member 18, respectively, and each sliding tumbler 40
The left end faces of gates a and 40b having gates 42a and 42b are adjacent to the fence 36 and prevent the running board 34 from retreating.

Each tumbler 40a, 60a and tumbler 40
If a spacer is interposed between the tumblers 40a, 60a, 40b, and 60b, the tumblers 40a, 60a, 40b, and 60b can operate more smoothly.

Next, the operation and operation of the safe deposit box lock having the above configuration will be explained.

The normal unlocking and locking operations are exactly the same as the conventional double-barreled safe deposit box lock. That is, to unlock the bank, first, in the state shown in FIG. 3, a bank clerk inserts the bank key 72 into the bank key guide member 18 and rotates it clockwise. Tumbler 40b, 60
b, the key thread of the bank key 72 slides against the lever portion 64b and rotates clockwise against the biasing force of the spring 68b, and the opening of the gate 42b is held in the unlocked position aligned with the fence 36. .

Next, the customer inserts his or her customer key 70 into the customer key guide member 16 and rotates it clockwise.
During the initial rotation process, the key thread of the customer key 70 comes into sliding contact with the lever portion 64a, and as the customer key 70 rotates, the opening of the gate 42a of the sliding tumbler aligns with the position of the fence 36. When the customer key 70 is further rotated, the arm formed integrally with the customer key guide member 16 acts on the running plate 34 to move the running plate 34 backward, and the bolt 32 is pulled into the unlocked position, and the lock is unlocked. be done. At this time, Fuens 36
enters into each gate 42a, 42b. This state is shown in FIG.

When locking, use the bank key 72 and customer key 70
Just by returning it to the locked position, it will automatically enter the state shown in Figure 3 and be locked.

Next, the key exchange operation and the operation of each member due to this operation will be explained in detail based on FIG. 5.

First, the gates are unlocked by the above-described unlocking operation, and the fences 36 are fitted into each of the gates 42a and 42b. In this state, the conversion holes 44a, 44b of each sliding tumbler 40a, 40b and the conversion hole 22 of the guide member 20 are aligned with and communicate with the conversion key hole 12.

Next, insert the replacement key 74 for key replacement operation into the lock box body 1.
0 into the conversion key hole 12 from the back side. The conversion key 74 has a cylindrical shaft portion with a protrusion 75 extending in the axial direction as an acting portion. When the conversion key 74 is turned approximately 90 degrees clockwise in the drawing,
The protrusion acts on the left side of the exchange hole 22 and the guide member 2
0 to the left against the biasing force of the spring 28. At the same time, each sliding tumbler 40a,
40b also moves to the left, and the engagement between the engagement parts 50a, 50b and the engagement parts 62a, 62b is released. The movement of each sliding tumbler 40a, 40b is performed when the protrusion 75 of the conversion key 74
4b or via the guide member 20 whose actuating shaft 24 acts on the grooves 46a, 46b.

When the sliding tumblers 40a, 40b and the variable tumblers 60a, 60b are separated, the sliding tumblers 40a, 40b are replaced by the fitting between the conversion key 74 and the conversion holes 44a, 44b, or the fitting between the gates 42a, 42b and the fence 36. The variable tumbler 6 is held in this unlocked position by the engagement between the grooves 48a and 48b and the guy shaft 26.
0a and 60b are rotatable around the support shaft 14.

From this state, one or both of the customer key 70 and bank key 72 to be converted is returned to the locked state. When the guest key 70 is returned to the locked state, the running board 34 moves forward and the bolt 32 protrudes, but each gate 42,a
42b is a sliding tumbler 40a, 40
Since b has moved to the left, it will not come off the fence 36. FIG. 6 shows a case where the customer key 70 and the bank key 72 are exchanged at the same time.

Once the keys 70, 72 are returned to the locked position, they are removed, a new customer key and bank key are inserted, and these new keys are rotated to the unlocked position. In this rotation process, each variable tumbler 60a, 6
0b is lifted with each operating surface slidingly touching the corresponding key ridge, rotated clockwise and held in the unlocked position.

After each new key is rotated to the unlocked position, the conversion key 74 is rotated approximately 90 degrees counterclockwise in the drawing and removed. The guide member 20 is moved rightward by the biasing force of the spring 28, and the sliding tumblers 40a, 40b are also moved rightward, and the engagements 50a, 50b are moved to the variable tumblers 60a, 6.
0b is engaged with the engaging portions 62a and 62b. This means that the relative engagement positions of the sliding tumblers 40a, 40b and the variable tumblers 60a, 60b are changed, and the tumblers are fixed to a group that can be locked and unlocked using a new key and bank key.

The key exchange is completed by the above operations and operations. This safe deposit box lock can then be unlocked and locked using a new customer key and bank key.

In the above embodiment, in order to support the running plate integrated with the bolt in a state where it can run in the locking/unlocking direction, the running plate is provided with shafts 14, 24, 2.
6, and the hole is shaped to be elongated in the running direction of the running board, but various methods can be used to support the running board in a state where it can run in the locking/unlocking direction. Needless to say, you can get it. For example, a part of the guide member 20 may be made wide, and the
An elongated guide having a U-shaped cross section may be provided at the lower edge so that the opening sides of the U-shape face each other, and the upper and lower edges of the running plate may be loosely fitted into the opening.

Further, in the above embodiment, the guide member is provided with the round guide shaft 26, and the sliding tumbler is provided with the grooves 48a and 4, which are loosely fitted with the guide shaft.
8b and the shape of the groove is horizontally elongated, but it goes without saying that the shapes of the shaft and the groove can be changed in various ways. For example, a vertically long thin projection may be provided in place of the guide shaft, and the sliding tumbler may be provided with a hole shaped to allow the sliding tumbler to move laterally and rotate about the support shaft 14.

[Effects of the Invention] In the present invention, each sliding tumbler is supported by one guide member, and the guide member separates and integrates each sliding tumbler with each variable tumbler, so that the sliding tumblers are individually energized. There is no need to do this, there is no need for a separate biasing member, and furthermore, the structure is simplified, so it operates reliably.

In the double lock, the variable tumbler is supported by one shaft, so the structure and assembly are simple.

As described above, the present invention reduces the number of parts and has a simplified structure, making it easy to assemble and keeping manufacturing costs low.

[Brief explanation of drawings]

The attached drawings show a safe deposit box lock as a preferred embodiment of the lock according to the present invention, and FIG. 1 is a front view with the tumbler removed, FIG. 2A and FIG.
Figure B is an exploded front view of the tumbler.
FIG. 4 is a front view showing the locked state, FIG. 4 is a front view showing the unlocked state, and FIGS. 5 and 6 are front views showing the main steps in the key exchange operation. 10...Lock box body, 12...Conversion key hole, 1
4... Support shaft, 20... Guide member, 22... Conversion hole, 24... Operating shaft, 26... Guide shaft, 28...
...Spring member, 40a, 40b...Sliding tumbler, 44a, 44b...Conversion hole, 46
a, 46b, 48a, 48b... groove, 50a, 5
0b...Engaging part, 60a, 60b...Variable tumbler, 62a, 62b...Engaging part, 64a, 64
b...Lever part, 66a, 66b...Shaft hole, 74
...conversion key.

Claims (1)

[Scope of Claims] 1. The lock box body includes a running board that operates integrally with the bolt, and a tumbler equipped with a gate that allows a fence provided on the running board to retreat at a predetermined unlocked position. , in a lock in which the tumbler is moved to the unlocked position by rotation of a predetermined key, the tumbler is comprised of a sliding tumbler 40a, 40b having a gate and a variable tumbler 60a, 60b that is operated by a key. The sliding tumbler and the variable tumbler are each formed with engaging parts 50a, 50b, 62a, and 62b that can be engaged at appropriate relative positions, and the sliding tumbler is moved in the direction in which the engaging parts engage. A guide member 20 is provided which biases and guides the sliding tumbler in a rotatable and slidable manner, and when the sliding tumbler and the variable tumbler are engaged, the variable tumblers 60a and 60b are rotated along the axis of their integral rotation. A conversion hole 22 is formed in the guide member 20 into which the conversion key 74 is inserted, and when the conversion key inserted into the conversion hole rotates, the key thread of the conversion key is rotated. The pressure of the tumbler is applied to the engaging parts 50a, 50b,
A key-replaceable lock characterized in that a receiving surface is formed in the direction in which the keys 62a and 62b are separated. 2. The guide member is slidably attached to the lock box body, and the two grooves 46a provided in the sliding tumblers 40a, 40b.
46b, 48a, 48b, respectively, and the grooves 46a, 46b fitted with the operating shaft 24 are arranged in the direction in which the sliding tumbler and the variable tumbler engage and separate. The grooves 48a and 48b have a shape that restricts the relative movement between the sliding tumbler and the guide member and allows rotation in the direction of rotation about the support shaft 14, and which are fitted with the guide shaft 26. Claim 1 is characterized in that the sliding tumbler and the variable tumbler have a shape that enables movement in the engagement/separation direction and in the rotational direction about the support shaft 14. Key replaceable lock. 3. The guide member 20 is connected to the tumbler engaging portions 50a, 50b, 62a, 62b by the spring member 28.
3. The key-exchangeable lock according to claim 1 or 2, wherein the lock is biased in the direction of engagement. 4 The tumblers are two sliding tumblers 40a, 40b and two variable tumblers 60.
a, 60b, and each tumbler has engaging portions 50a, 50b, 62a with which one sliding tumbler 40a and variable tumbler 40a and the other sliding tumbler 40b and variable tumbler 60b can engage with each other. ,6
Equipped with 2b, 2 sliding tumblers 4
0a, 40b and two variable tumblers 60a,
6. The key-exchangeable lock according to claim 1, wherein the locks 60b are stacked one on top of the other to form a double lock.