JPS6047177A - Cylinder 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 cylinder lock, and more particularly, to a cylinder lock suitable for use by an unspecified number of people (= a door of a room etc. served).

In the case of locks, such as the entrances and exits of each room in a hotel, which are used by an unspecified number of people and where the user is often left with the responsibility of keeping the key to the door, it is easy for the lock to be lost, and a master key must be prepared. is necessary.

Moreover, the scope of responsibility for security management tends to be unclear, and when taking into consideration the duplication of keys by malicious users, cases often arise where the entire key has to be replaced with a new one. .

First, a conventional cylinder lock will be explained.

FIG. 1 is a front view showing the appearance of a typical cylinder lock. In the figure, the cylinder lock has cylinder part A,!
:? The mounting part B is attached so as to sandwich a door plate or the like from both the front and back sides, and a cylindrical cylinder part A is inserted through the mounting part B. The cylinder part A is composed of an outer cylinder 1 and an inner cylinder 2. The outer cylinder 1 is fixed to the mounting part B, and the inner cylinder 2 has a key groove 2 in the axial direction of the cylinder.
o is engraved with a latch part (not shown) inside the door.The latch part engages with the cylinder 2 when it becomes locked or unlocked in conjunction with the rotation of the inner cylinder 2. The lock itself is locked and unlocked.Then, the rotation of the inner cylinder 2 moves the boundary between the bottles arranged in the bottle hole communicating with the outer cylinder 1 into the boundary between the inner and outer cylinders by inserting the key (i1). By making them match, it becomes easy.

FIGS. 2(a) and 2(b) are cross-sectional views illustrating the relationship between the above-mentioned keys and the bottle states. In the figure, the bottle holes 11a, 12'a, 13a of the outer cylinder 1 and the bottle holes 21a, 22a, 23a of the inner cylinder 12 are in the direction of the keyway (when the nib position is aligned and the lock is in the locked state). Assuming that the inner cylinder 2 is in the moving position, the bottle holes 11a and 21a of the inner and outer cylinders
, 12a and 22a, 113a and 23a are in communication. These bottle holes (the second one has an outer cylindrical bottle 16 on the outer circumferential side)
a, 17a, and 18a are fitted respectively, and the inner cylinder bottles 26a, 27a, and 28a are in contact with the outer cylinder bottle on the inner cylinder side, and the inner peripheral side is is being pushed to. When the key 3 is inserted into the key groove, the key 3 is inserted while pushing the inner cylinder pins 26a, 27a, and 28a back toward the outer cylinder. Inner cylinder pin 26a,
27a and 28a are cylindrical and each have a unique dimension in the longitudinal direction, and the bottle configuration of each dimension is the identification of the lock corresponding to the shape of the key. In this conventional example, the inner cylinder pin 26a is shorter than the inner cylinder pin 27a,
Since the lengths of the inner cylinder pin 27a and the inner cylinder pin 28a are equal, the crest of the key 3 that pushes back the bottle is configured as "low", "low", and "high" from the tip side, as shown in Figure (A). If it corresponds to
If the shape of the mountain ′ does not correspond to the bin configuration, for example,
The inner cylinder pin 26a does not reach the outer periphery of the inner cylinder 2 and the outer cylinder pin 16a bites into the inner cylinder side, and conversely, the inner cylinder pin 28a is pushed back too far into the key peak and bites into the outer cylinder side. Tube 2
is locked to the outer cylinder 1 with a pin and cannot be rotated, making it impossible to unlock it.

In this way, if the key that corresponds to one lock is only one obscene key, security concerns will arise every time the key is lost or a malicious user may copy it. Moreover, the scope of responsibility is unclear, and in many cases the entire lock must be replaced with a new one.

In addition, in order to deal with this, conventionally one mounting part (=
One idea was to use two cylinder locks to unlock each cylinder with a different key, but this naturally resulted in a larger device and the cost and effort involved in refurbishing the door.

The purpose of the present invention is to solve the above problems, provide excellent security, prevent fraud, and clearly define the scope of management responsibility.
- To provide a cylinder lock which can be converted into a double lock by simply replacing the cylinder head of an ordinary lock.

In order to achieve the above object, the present invention provides two different types of keys that can be inserted into one cylinder lock, and provides a relay point between the inner cylinder and the lock while the inner cylinder rotates from the locked position to the unlocked position. The first key is responsible for the rotation from the locked position to the relay point, and the second key is responsible for the rotation from the relay point to the unlocked position. and 1-ru.

Hereinafter, the present invention will be explained in detail with reference to the accompanying drawings.

FIGS. 3(A), 3(B), and 3(C) are schematic front views showing the rotation of the inner cylinder of the cylinder lock according to the present invention. In the figure, part of the cylinder is outer cylinder 1 and inner cylinder 2.
The inner cylinder 2 has a key groove 20 carved therein. Figure (A) shows the case where the inner cylinder 2 is in the first rotational position (a) where the lock is in the locked state, and the keyway 20 is in the royal position. Figure (b) shows the second rotational position (b) where the lock is in the unlocked state.
) shows the case where the inner cylinder 2 is located, and the keyway 20 is in a position rotated 320 degrees in a clockwise direction from the erect position. (C) shows the case where the inner cylinder 2 is at the third rotational position (C) set as a relay point, and the keyway 20 is in a position rotated 40 degrees clockwise from the royal position. It has become. Note that these rotation angles are determined by the material of a part of the cylinder and the stroke of the latch portion engaged with the inner tube, and the above is just an example.

Next, the structure of the bottles arranged in the outer cylinder (two will be explained) corresponding to each rotational position. FIG. 4 is a sectional view showing an example of a part of the cylinder in which the present invention is implemented. In Figure 2, a part of the cylinder consists of an outer cylinder 1 and an inner cylinder 2, and the inner cylinder 2 having a keyway 20 is rotatable twice (fitted) inside the outer cylinder 1.

However, when actually inserting and rotating the key (- means the bottle configuration described later and the key shape must be matched and the locking by the bottle must be released. Bottle holes 11a, 12 aligned in the axial direction at radial positions (a), (b) and (C) corresponding to each rotational position
a-15a, 11b.

12 b ・15 b and llc, 12 c ・-・
15c are provided circumferentially aligned with axial bin positions 11a, llb, lla, etc. As an example, FIG. 4 shows the first bottle holes 11a, llb and ll.
c, the inner cylinder 2 is in the first rotational position in the locked state, and the bottle hole 11a on the outer peripheral side and the bottle hole 21 on the inner cylinder side are in the locked state.
A is in a state of communication. When the key is not inserted, the outer cylindrical bottle 16a is urged by the spring 10 to push the inner cylindrical bottle 26a into the hole bottom, and it also pushes the inner cylindrical bottle 26a into the hole hole 21a on the inner peripheral side.
It is inserted halfway into the inner cylinder 2, and locks the inner cylinder 2 unrotatably.

The outer cylinder pins 16b and 16c, which are in two other rotational positions that do not correspond to the inner cylinder pin, are similarly pressed against the outer circumferential wall 4 of the inner cylinder 2 by spring force. Furthermore, the third relay point position
At the radial position (0) of the outer cylinder 1 corresponding to the rotational position of
A key locking pin 36c is disposed in the bottle hole 31c on the circumferentially axially symmetrical side with respect to the bottle hole 11c and the outer cylinder bottle 16a, and is pressed against the inner cylinder 2 by a spring force. Note that the position of the key locking pin 36c may be slightly moved along the keyway.

FIG. 5 is a side view showing an example of a pair of keys according to the present invention (two keys). The part to be inserted into the keyway (2) is the cylinder shaft (=
Both keys have the same cross-sectional shape at right angles, corresponding to the cross-section of the keyway.

The difference between the two keys is that the blade of the key (2) is in the shape of a ``mountain'' along the direction of the key groove to push back the inner cylinder pin, and ′ mountain I (position indicated by line 11) corresponding to .

The first key 3A is at the "high" level (-1, and the second key 3B is at the "low" level (2). position) is set to the "low" level for the first three people, but is set to the "high" level for the second key 3B.
The I peaks at the two pin positions (positions indicated by lines 12, 13 or 14) are "soma" or "similar" and are common to the two keys ζ. Of course, there is no problem in forming either position as "high" or "middle", and that configuration becomes the distinguishing feature that is compared with each cylinder lock. In addition,
There are two keys (the second one is the key blade (= the butt part on the opposite side; the first key has a notch 30A or 30B that accepts the key locking bottle, and the tip side of the first key notch 30A is It has a gentle slope, and when you pull out the key, you can slide the head of the key locking bottle, but the second key
The movable notch 30B is notched at an acute angle and is deeply engaged with the key locking pin, so that the second key 3B cannot be removed at the third rotational position which is the relay point.

FIG. 6 is a cross-sectional view illustrating the state of the key and bottle configuration at each rotational position according to the present invention. In the figure, a part of the cylinder is composed of an outer cylinder 1 and an inner cylinder 2.
A state in which the first key 3A or the second key 3B is inserted into the keyway is shown. 5 along the direction of the keyway
Of the three bin positions, the middle three bin positions (lines 12, 13
and 14) (As mentioned above, the level of the r-mount 1 of the two keys is the same, and the configuration of the bins of the inner and outer cylinders is also the same at all rotational positions and corresponds to the level. , the boundary between the bottles coincides with the boundary between the inner and outer cylinders, and does not affect the rotation of the inner cylinder 2.In this embodiment, four types of inner cylinder bottles with different length dimensions are provided, and each It is designed to match the boundary between the bottle and the boundary between the inner and outer cylinders in response to the case where the I mountain of the key is "high", "soma", "similar" or "low".This implementation In the example, the bottle holes of the inner cylinder 2 at the bottle positions at both ends (positions indicated by lines 11 or 15) have "high" (two-pair window sliding,
In other words, the shortest and smallest bottle is loaded. Now, the 6th
Figures (i-'k) and (i-B) show the case where the inner cylinder 2 is in the first rotational position where five locks are in the locked state. The pin configuration of the outer cylinder 1 corresponding to this rotational position is the pin hole 11a.
is a normal bottle hole, and a normal outer cylindrical bottle 1'6a is loaded, but the bottle hole 15a has a larger hole diameter than usual, and instead of a bottle, a ball with a diameter that cannot enter the inner bottle hole is inserted. is loaded. Figure (i-A) shows how three first keys are inserted in the above state. Since the bottle hole 21a of the inner cylinder (the ``mountain'' to the two pairs of keys 3 is "high", the inner cylinder bottle 26a is pushed back sufficiently, and the outer cylinder bottle 16a
The boundary between the inner and outer cylinders coincides with the boundary between the inner and outer cylinders. Since one thread of the key 3A corresponding to the bottle hole 25a is "low", the short internal bottle 30a does not reach the boundary.

Normally, the outer cylinder pin would enter the inner peripheral side and lock the inner cylinder, but as mentioned above, the large ball 20a is loaded into the outer peripheral side bottle hole 15a, so the inner cylinder side (The second key 3B cannot be penetrated, therefore, the first three keys can be rotated for all five pairs of bottle holes. Figure (i-B) shows the second key 3B inserted in the same state. Since the "crest" of this key 3B is "high" relative to the bottle hole 25a (2), the outer end of the inner cylindrical bottle 30a is just in contact with the ball 20a, but it is "low" relative to the bottle hole 21a.
The outer end of the inner cylinder pin 26a does not reach the boundary between the inner and outer cylinders, but enters the outer cylinder pin 16a, and the inner cylinder 2 is locked. That is, the second key 3B cannot rotate the inner cylinder at the first rotation position.

FIGS. 6 (II-A) and (II-B) show the third rotational position (the case where there are two inner cylinders 2) set as a relay point. The pin of the outer cylinder 1 corresponding to this rotational position The composition is the 10th
Contrary to the rotational position, a ball 16C is loaded into the bottle hole 11c, and a normal peripheral bottle 20C is loaded into the bottle hole 150. Therefore, as shown in Figure (II-A) (2), the first key 3A cannot rotate the inner cylinder 2, and as shown in Figure 1 (II-A).
-B), the second key 3B enables the inner cylinder 2 to rotate.

In addition, in this rotational position, as mentioned above, in addition to the normal outer cylinder pin, the key locking pin 36C is provided in the outer cylinder l, and is similarly biased by a spring and locks into the notch of the key 3A. 30A
Alternatively, it can be cut into the notch 30B of the key 3B, but as shown in the figure (I
As shown in I-A), the tip of the notch 30A of the key 3A has a gentle slope, so the locking pin 3 can be attached to the gentle slope.
While the key 3A can be pulled out while holding down the bottle head of 6C, the key 3A can be pulled out while holding down the bottle head of 6C.
Both sides of the notch 30B of 3B are at right angles, and the locking pin 36
(The second key is locked in C and cannot be moved between the key grooves, and the second key cannot be removed in this position. Figure 6 (fil-A) and (Ill- B) is
A case is shown in which the inner cylinder 2 is in the second rotational position where the lock is in the unlocked state, and the bottle configuration of the outer cylinder 1 corresponding to this rotational position is as follows.
Except for the absence of the key locking pin, the structure of the outer cylinder pin in the third rotational position is exactly the same, and the function is also the same, and as shown in FIG. The key 3A of No. 1 cannot rotate the inner cylinder 2, and the key 3A shown in the figure (n+
-B)+= As shown, the second key 3B enables the inner cylinder 2 to rotate. Note that the second key 3B can be freely inserted and removed at this rotational position.

That is, in this embodiment, depending on the key shape and pin configuration, the two keys have the functions shown in the table below at three rotational positions.

And cylinder locks with the above functions.

It is operated as follows.

To unlock the lock, first insert the first key at the first rotation position and rotate the inner cylinder clockwise. Even if the second key is inserted in this rotation position, it will not rotate. When the first key is rotated to the inner cylinder third rotation position, the first key cannot be rotated at that position (=, so remove it. Instead,
After inserting the second key and continuing the further rotation, when the inner cylinder reaches the second rotational position, the lock is unlocked by the latch portion engaged with the inner cylinder.

When locking, only the second key can rotate the inner cylinder at the second rotation position, so insert the second key and rotate the inner circumference counterclockwise (twice. is the third one on the way
However, the key @2 cannot be removed at that position, and even if the second key can be removed, the first key cannot be removed from the third rotation position. Since it cannot be rotated in the direction of , the latch part is completely locked by rotating the inner circumference of the second key (second key) to the first rotation position.

To summarize, unlocking is done by the first key from the first rotation position to the relay point, and the second key is used to move from the relay point to the second rotation position, and locking is done by the second key. Use only the No. 2 key. The first key cannot rotate in the second and third rotation positions, so it cannot participate in locking. If the second key comes out at the third rotation position. This means that both locking and unlocking are incomplete.

It is clear that the lock is in the first rotation position and the lock is in the unlocked state in the second rotation position, so just by looking at the part of the cylinder where the key is removed, you can confirm whether the lock is locked or unlocked by the angle of the keyway. What you can do (two things)

There are various ways to use the cylinder lock mentioned above, but when using it as a room key, the first key is always carried by the guest, and the second key is left at the hotel every time they go out. However, when using it as a safe deposit box lock,
The manager keeps the first key and is present every time the key is unlocked.
One possible method is that the customer holds the key and uses it to unlock and lock the second stage. In any case, since two keys are required to unlock the lock, it is impossible to unlock the lock even if only one is obtained, making it difficult for fraud to occur and being extremely effective from a security standpoint. Also, the first key is the first stage of unlocking,
The second key is the second key for unlocking and locking, so the division of control is clear, so the scope of responsibility is also clear.

As explained above, according to the present invention (-), security is superior, fraud is difficult to commit, the scope of management responsibility is clear, and as is clear from the structure, it is possible to simply replace the cylinder head of an ordinary lock. We can provide excellent cylinder locks that can be modified.

[Brief explanation of the drawing]

Fig. 1 is a front view of a general example of a cylinder lock, Fig. 2 is a cross-sectional view of the relationship between a conventional key and a bottle, Fig. 3 is a schematic front view of the inner cylinder of the present invention, and Fig. 4 is a diagram according to the present invention. FIG. 5 is a sectional view showing an example of a part of the cylinder, FIG. 5 is a side view of the key of the present invention, and FIG.
The figures are cross-sectional views illustrating the key and bottle configuration according to the present invention at various rotational positions. A...Cylinder part 1...Outer cylinder 2...
...Inner cylinder 3.3A, 3B... Key 10
...... Spring lla ~ 15c ... ... Outer cylinder pin hole 16a - 20c ... ... Outer cylinder pin or ball 20 ...... Keyway 21a - 25c ...
... Inner cylinder bottle holes 26a to 30c ... Inner cylinder bottles or balls 30A, 30B ... Notches 31C ... Locking bottle holes 36C ... Locking bottle (a)...First rotation position (b)...Second rotation position, (0)
...Third rotation position. Patent applicant: Kake Seisakusho Co., Ltd. (one other person); Patent attorney: Michizo Isono, T) 272) A1 Udo 3 (A) (B) (C)

Claims (1)

[Claims] Inserting the key (by aligning the boundary between the pins of the inner and outer cylinders with the boundary between the inner and outer cylinders, the inner cylinder can be rotated, and the first rotational position is where the lock is in the locked state, and the second rotational position is where the lock is in the unlocked state). In a cylinder lock that locks and unlocks by rotating between rotational positions 1 and 2,
The key is provided with two different shapes of keys that can be inserted into one cylinder lock, and a third rotational position serving as a key relay point is set between the first rotational position and the second rotational position. The first key is connected to the first key by changing the bottle configuration for each rotating position.
The inner cylinder can be rotated only at the 0 rotation position, and can be inserted and removed at the 1st rotation position and the 3rd rotation position, and the second key is connected to the 3rd rotation position. In the rotational position, it is only possible to insert the inner cylinder, and in the first rotational position, the inner cylinder cannot be rotated, and in the second and third rotational positions, the inner cylinder cannot be rotated. A cylinder lock characterized in that it can be rotated.