JPH0742425A - Locking and unlocking mechanism - Google Patents

Abstract

PURPOSE:To provide an excellent crime-preventative locking and unlocking mechanism which is capable of deregulating the movement rules of a cylinder lock when a key is inserted into a regular position. CONSTITUTION:A regulation unit 31 is installed to a lock 30 to regulate and release the turning of a cylinder 5 by inserting a key. This regulation unit 31 comprises a regulation hole 32, guide pins 33 which are inserted into the regulation hole 32 one after another, a lock pin 34 and a spring 35. The guide pin 33 comes in contact with the tip of the key inserted into a key groove 8 at a regular position while the lock pin 34 moves together with the guide pin 33 and regulates and deregulates the cylinder 5.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a locking / unlocking mechanism using a so-called cylinder lock used for locking and unlocking doors and the like.

[0002]

2. Description of the Related Art Conventionally, locking / unlocking of a device opening / closing door has been
This is done by using a cylinder lock.

Next, a conventional locking mechanism will be described with reference to FIGS. FIG. 4 is a schematic configuration diagram showing a device equipped with a locking mechanism, and FIG. 5 is a plan view of the device when locked. 6 is a front view of the lock plate when locked, and FIG. 7 is a side view showing the lock plate. An opening / closing door 2 is attached to the device 1 by a hinge so as to be openable / closable in the directions of arrows E and F shown in FIG. A lock 3 is mounted on the opening / closing door 2, and a movable member 3a of the lock 3 is engaged with a lock lever 2b formed on a lock plate 2a.
The lock lever 2a is rotatable about the shaft 2c as a fulcrum, and is biased in the direction of arrow I shown in FIG. 7 by a spring (not shown). Also, the lock plate 2a
Similarly, the side portion 2e is engaged with the lock stud 2d fixed to the device 1 as shown in FIG. 7, and in this state, the opening / closing door 2 cannot be opened in the arrow F direction.

Next, the structure of the lock 3 will be described with reference to FIGS. FIG. 8 is a side sectional view of a conventional lock when locked, and FIG. 9 is a front view showing a key groove. FIG. 10 is a front view showing the plate. The lock 3 includes a frame 4 fixed to the device 1, a substantially cylindrical cylinder 5 rotatably attached to the frame 4, a plate 6 fixed to the cylinder 5 with a screw, and a movable member 3a. Movable member 3
The a and the plate 6 are adapted to rotate together with the rotation of the cylinder 5, and the plate 6 is provided with a notch 6a as shown in FIG. Therefore, when the cylinder 5 rotates and the side portion of the notch 6a collides with the stud 7 fixed to the frame 4, the rotation angle of the plate 6 is restricted and the rotation angle of the cylinder 5 is restricted. To be done. Further, by providing the plate 6, the cylinder 5 cannot be pulled out in the arrow D direction. As shown in FIG. 9, the key groove 8 of the cylinder 5 into which the key 26 described later is inserted is the key
It is formed according to the shape of 6.

Next, the internal structure of the lock 3 will be described. As shown in FIG. 8, the lock 3 is formed with pin holes 9, 10 and 11 penetrating from the frame 4 to the cylinder 5. Guide pins 12, 13, 1 are provided in the respective pin holes 9-11.
4, lock pins 15, 16, 17 and spring 1
8, 19, and 20 are sequentially inserted. Also cylinder 5
Two salamimi holes 22 are formed on the outer peripheral surface of
A detent ball 23 is fitted in both salami fir holes 22. One salami hole 22 is the cylinder 5
Is formed at a position aligned with the above-mentioned pin holes 9 to 11, and at the time of locking, the detent spring 24 inserted into the hole 21 formed in the frame 4 causes one salamimi hole 2
It is designed to fit in 2. Although not shown, the other salami hole is formed at a position where the cylinder 5 in the state shown in the figure is rotated until the rotation is restricted. The pin plate 25 fixed to the frame 4 is provided with the holes 9
It is blocking ~ 11 and 21. Also, lock pins 15 to 17
Fits into the cylinder 5 from the frame 4 and restricts the rotation of the cylinder 5. In this state, the opening / closing door 2 is locked. When the key 26 is inserted into the key groove 8, the guide pins 12 to 14 are engaged with the key shape 26a of the key 26 by the urging force of the springs 18 to 20.

Locking and unlocking operations of the device 1 having the lock 3 having the above structure will be described with reference to FIGS. 4 to 11. FIG. 11 is a cross-sectional view showing a lock when a key matching the lock is used. First, the lock release operation will be described. When the key 26 matching the lock 3 is inserted vertically from the key groove 8 as shown in FIG. 11, the key shape 26a of the key 26 is formed.
However, the guide pins 12 to 14 are pushed up in the direction opposite to the biasing direction of the springs 18 to 20. Also guide pin 1
By pushing up 2 to 14, the guide pin 12
-14 simultaneously push up the lock pins 15-17 which contact the rear ends of the guide pins 12-14. Then, when the key 26 is inserted to the regular insertion position A of the key 26, that is, the deepest portion, the guide pins 12 to 14 are positioned by the key shape 26a. At this time, the rear ends of the guide pins 12 to 14 coincide with the outer peripheral surface of the cylinder 5, and the lock pins 15 to 17 come out of the cylinder 5. Lock pin 15 ~
The rotation restriction of the cylinder 5 by 17 is released, and the cylinder 5 becomes rotatable with respect to the frame 4.

After that, when the operator rotates the key 26 in the direction of the arrow B, the detent ball 23 is inserted into the salamimi hole 2 on one side.
Detach from 2 and cylinder 5 by detent spring 24
Insert into the salamimi hole on the other side while press-contacting the outer shape. In addition, when the cylinder 5 rotates, the movable member 3a is locked by the lock lever 2.
By rotating a in the direction of arrow H, the lock lever 2a is separated from the lock stud 2d, and the door 2 is unlocked. At this time, the key 26 is inserted sideways into the key groove 8. In addition, by inserting the detent ball 23 into the other salamimi hole, the operator can be notified of the end of rotation and unlocking. Then, the operator can open the door 2 by rotating the opening / closing door 2 in the arrow F direction with the key 26 as a handle.

With the rotation of the cylinder 5, the guide pins 12 to 14 are separated from the pin holes 18 to 20 of the frame 4,
The positions of the guide pins 12 to 14 are fixed by coming into contact with the inner peripheral surface of the frame 4, so that the key 26 is inserted into the key groove 8
It cannot be pulled out from.

Next, the locking operation will be described. Key 2 above
When 6 is in the state of being inserted sideways into the keyway 8 (that is, in the unlocked state), open the opening / closing door 2 in the direction of arrow E.
After closing in this direction, the key 26 is rotated in the direction of arrow C to rotate the cylinder 5 in the same direction. Detent ball 2 at this time
3 is removed from the other salamimi hole and fits into one salamimi hole 22. The guide pins 12 to 14 move along with the cylinder 5 along the inner peripheral surface of the frame 4 at a position where the rotation of the cylinder 5 is restricted, that is, at a position where the side portion of the cutout portion 6 a collides with the stud 7. It is pressed against the lock pins 15 to 17. The movable member 3a is rotated together with the rotation of the cylinder 5, and the lock lever 2a is rotated in the direction of arrow I by the urging force of the spring. Then, the lock lever 2a and the lock stud 2d are engaged with each other. With the above operation, the opening / closing door 2 is locked, and the key 26 can be pulled out from the key groove 8.

The case where the key 26 that does not match the lock 3 is inserted into the cylinder 5 will be described with reference to FIG. FIG. 12 is a cross-sectional view showing a state of the lock when a key that does not match the lock is used. When the key 26b that does not match the lock 3 is inserted into the key groove 8 up to the regular position indicated by A, the key shape 26d pushes up the guide pins 12 to 14 and the key shape 26d pushes up the guide pins 12 to 14 as in the case of using the key 26 that matches the lock 3. It is positioned by 26b. At this time, the key shape 26d that engages with the guide pin 12 is the key shape 26a of the key 26 that matches the lock 3.
Therefore, the guide pin 12 cannot be pushed up so much as to coincide with the outer peripheral surface of the cylinder 5. As a result, lock pin 1
The rotation restriction of the cylinder 5 by 5 is not released. Therefore, the cylinder 5 cannot rotate even if the restriction by the remaining lock pins 16 and 17 is released.

[0011]

However, the above-described conventional locking mechanism may cause the following problems. This will be described with reference to FIG. FIG. 13 is a cross-sectional view showing a problem that occurs when a key that does not match the lock is not inserted into the regular position. As described above, when the key 26b that does not match the lock 3 is inserted into the key groove 8, as shown in FIG. 12, when the tip is inserted to the regular position A, the key shape 26d becomes one of the guide pins 12-14. , Or the cylinder 5 cannot be pushed up to the extent that the cylinder 5 can be rotated, or the cylinder 5 cannot be rotated because it is pushed up beyond the outer peripheral surface of the cylinder 5, but as shown in the figure, the tip of the key 26b is in the regular position A. Guide pins 12 to 14 pushed up by the key shape 26d at a position where
The rear end of the cylinder 5 may coincide with the outer peripheral surface of the cylinder 5, and in this state, when the key 26b is rotated, the cylinder 5 is rotated. As a result, there is a possibility that the opening / closing door 2 may be opened even with the key 26b that does not match the lock 3, and the crime prevention property is poor.

In view of the above problems, the present invention provides a superior locking mechanism that further improves crime prevention by allowing a cylinder to move only when a key matching a lock is inserted to a regular position. To aim.

[0013]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a guide pin projectingly arranged in a key groove formed in a cylinder inserted in a mounting portion, and a guide pin that moves together with the guide pin. A lock pin that fits into the cylinder from the mounting portion and regulates movement of the cylinder, and moves the guide pin by abutting the outer shape of the key inserted into the key groove,
In the locking / unlocking mechanism that allows the lock pin to be removed from the cylinder and move the cylinder, the movement of the cylinder is restricted when the key is not inserted, and the lock pin is brought into contact with the tip of the key with the key inserted in the normal position. A regulation unit for releasing the above regulation is provided.

[0014]

When the key is inserted into the keyway to the regular position, the guide pin moves due to the shape of the key to pull out the lock pin from the cylinder, and the tip of the key engages with the restricting portion. As described above, the movement restriction of the cylinder by the lock pin and the restriction portion is released. As a result, the cylinder cannot move before the key reaches the regular position.

[0015]

Embodiments of the present invention will be described in detail below with reference to the drawings. Note that elements common to the drawings are given the same reference numerals. FIG. 1 is a side sectional view showing a lock according to an embodiment of the present invention. The lock 30 is provided with a restriction portion 31. The restricting portion 31 is formed by penetrating from the frame 4 serving as the mounting portion to the cylinder 5 and facing the regular position (A), and the guide pin 33 and the lock pin 34 sequentially inserted into the restricting hole 32. , And a spring 35. The spring 35 pushes down the guide pin 33 and the lock pin 34 toward the key groove 8 side which is a key groove. The guide pin 33 is adapted to engage with the tip of the key shape 26a of the key 26 when the key 26 is inserted into the key groove 8, and the lock pin 34 is fitted into the cylinder 5 from the frame 4 and the cylinder 5 of the cylinder 5. Rotation is restricted. In this state, the opening / closing door 2 is locked. The other structure is the same as the conventional one.

Next, the locking and unlocking operation of the lock 30 having the above structure will be described with reference to FIGS. 2 and 5 to 7. FIG. 2 is a sectional view showing the state of the lock when the key is inserted into the lock of the embodiment. First, the lock release operation will be described. When the key 26 matching the lock 30 is inserted into the key groove 8, the key shape 26a
However, the guide pins 12 to 14 are pushed up in the direction opposite to the biasing direction of the springs 18 to 20 and the lock pins 15 to 17 are pushed up. And key 26 to the regular position A
When the key is inserted, the tip portion 36 of the key shape 26a pushes up the guide pin 33 and pushes up the lock pin 34. Then, the guide pins 12 to 14 and 33 are positioned along the key shape 26a by the biasing forces of the springs 18 to 20 and 35. At this time, the guide pins 12 to 14,
The rear end of 33 coincides with the outer peripheral surface of the cylinder 5, and the lock pins 15 to 17 and 34 are removed from the cylinder 5. As described above, the rotation restriction of the cylinder 5 by the lock pins 15 to 17 and 34 is released, so that the cylinder 5 can rotate with respect to the frame 4.

Thereafter, when the key 26 is rotated in the direction of the arrow B, the detent ball 23 is disengaged from one salami hole 22 and the cylinder 5 is urged by the detent spring 24.
Insert into the salamimi hole on the other side while press-contacting the outer shape. At this time, the side portion of the cutout portion 6a of the plate 6 collides with the stud 7 and its rotation is restricted. In addition, the movable member 3a rotates the lock lever 2a in the arrow H direction by the rotation of the cylinder 5, whereby the lock lever 2a is separated from the lock stud 2d, and the open / close door 2 is unlocked. And arrow F
The door 2 can be opened by rotating the opening / closing door 2 in the direction.

With the rotation of the cylinder 5, the guide pins 12 to 14 and 33 are inserted into the pin holes 18 to 20 and 3 of the frame 4.
The key 26 cannot be pulled out from the key groove 8 because the positions of the guide pins 12 to 14 and 33 are fixed by being separated from 2 and coming into contact with the inner peripheral surface of the frame 4.

Next, the locking operation will be described. In the unlocked state, the opening / closing door 2 is rotated in the arrow E direction to close it, and then the key 26 is rotated in the arrow C direction to rotate the cylinder 5 in the same direction. At this time, the detent ball 23 separates from the other salamimi hole and fits into one salamimi hole 22. The guide pins 12 to 14 move along with the cylinder 5 along the inner peripheral surface of the frame 4, and press-contact with the lock pins 15 to 17 at the position where the rotation of the cylinder 5 is restricted. Further, when the cylinder 5 rotates, the movable member 3a moves to the lock lever 2
The lock lever 2a is engaged with the lock stud 2d by rotating a in the direction of arrow I. As described above, the key 26 can be pulled out from the key groove 8. Then, by pulling out the key 26 from the key groove 8, the lock pins 15 to 17 and 34 are fitted into the cylinder 5 from the frame 4, and the opening / closing door 2 is locked.

The operation when the key 26b that does not match the lock 30 is inserted will be described with reference to FIG.
FIG. 3 is a cross-sectional view showing a state of the lock when a key that does not match the lock is not inserted to the regular position A. Before the key 26b that does not match the lock 30 reaches the regular position, the key shape 2
Even if the lock pins 15 to 17 come out of the cylinder 5 due to 6d, the guide pin 33 has the key shape 26.
d Since it is not yet engaged with the leading portion 36a, the regulating portion 31
Lock pin 34 restricts the rotation of the cylinder 5,
Therefore, the cylinder 5 cannot rotate.

By the way, in the above embodiment, the regulating portion 31 is provided on the upper side of the key groove 8 in the drawing, but it may be provided on the lower side. Further, when the key 26a having the key shape 26a formed on both sides is used, the restricting portions 31 may be provided on both upper and lower sides.

Although the present invention has been described as a lock using a rotary cylinder, it can be applied to a slide lock in which the cylinder moves in the axial direction of the cylinder.

[0023]

As described above in detail, according to the present invention, since the cylinder is provided with the restricting portion that engages with the tip of the key only when the key is inserted to the regular position, it does not match the lock. It is no longer possible to move the cylinder by moving the lock pin out of the cylinder by engaging the key with the guide pin before the key is inserted into the regular position by the key. As a result, it is possible to realize a locking / unlocking mechanism with further excellent security.

[Brief description of drawings]

FIG. 1 is a side sectional view showing a locking mechanism according to an embodiment of the present invention.

FIG. 2 is a sectional view showing a state of a lock when a key is inserted into the lock of the embodiment.

FIG. 3 is a cross-sectional view showing a state of a lock when a key that does not match the lock is used.

FIG. 4 is a schematic configuration diagram showing an apparatus equipped with a locking mechanism.

FIG. 5 is a plan view showing the device at the time of locking.

FIG. 6 is a front view showing a lock plate when locked.

FIG. 7 is a side view showing a lock plate.

FIG. 8 is a side sectional view showing a conventional lock.

FIG. 9 is a front view showing a key groove.

FIG. 10 is a front view showing a plate.

FIG. 11 is a cross-sectional view showing a state of a lock when a key matching the lock is used.

FIG. 12 is a cross-sectional view showing a state of a lock when a key that does not match the lock is used.

FIG. 13 is a cross-sectional view showing a case where a key that does not match the lock is used.

[Explanation of symbols]

 4 Frame 5 Cylinder 8 Key Groove 30 Lock 31 Restriction Part 33 Guide Pin 34 Lock Pin

Front page continued (72) Inventor Isao Miyake 1-7-12 Toranomon, Minato-ku, Tokyo Oki Electric Industry Co., Ltd.

Claims (2)

[Claims] 1. A guide pin projectingly arranged in a keyway formed in a cylinder inserted into a mounting portion, and a lock pin that moves together with the guide pin and is fitted into the cylinder from the mounting portion to restrict movement of the cylinder. And has the outer shape of the key inserted into the keyway abutted to move the guide pin,
In the locking / unlocking mechanism that allows the cylinder to move by removing the lock pin from the cylinder, the movement of the cylinder is restricted when the key is not inserted, and the lock pin comes into contact with the tip of the key when the key is inserted to the normal position. A locking / unlocking mechanism, which is provided with a restriction portion for canceling the above restriction. 2. The restricting portion is a guide pin that is disposed so as to project in a key groove formed in the cylinder, and moves together with the guide pin, and is fitted into the cylinder from the mounting portion to restrict the movement of the cylinder to prevent the cylinder from moving. The locking / unlocking mechanism according to claim 1, further comprising a lock pin that releases the movement restriction when the lock pin is pulled out.