JPH0632638U - Cylinder lock - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a highly safe cylinder lock capable of preventing theft, which is illegally unlocked by picking or destroying the cylinder lock. [Structure] A sidebar 15 is inserted into a sidebar hole 13 provided in a plug 9, a recess 17 is provided on the inner peripheral surface of the case 1 so as to face the sidebar hole 13 when locked, and a groove 18 provided in the tumbler pin 12 is provided. Further, the engaging hole 19 facing the side bar hole 13 when the key K is inserted is provided.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a cylinder lock which prevents unauthorized unlocking and has increased strength against destructive force.

[0002]

[Prior art]

 A flange is provided on the front end of the case of the cylinder lock, a male screw is provided on the rear of the case, and after inserting the rear end of the case into the through hole of the door from the front of the door, the cylinder lock is done by a nut that is screwed into the male screw. Is fastened to the door. When the cylinder lock is locked, the driver pin pressed by the spring engages with the tumbler pin hole of the plug, and the plug cannot rotate.

When a regular key is inserted into the keyhole, the tumbler pin pushed by the key pushes the driver pin, and the contact surface between the tumbler pin and the driver pin is aligned with the shear line which is the outer peripheral surface of the plug, The plug inserted in the can be used to rotate the plug to the unlocked position. When the plug is rotated to the unlocked position, the tongue attached to the rear end of the plug is disengaged from the casing and the door can be opened.

When the cylinder lock is in the unlocked state, the key inserted into the key hole cannot be removed, but when the plug is turned to the lock position, the door is locked and the key can be removed. In this way, since the key cannot be removed when unlocked, it has the advantage of preventing forgetting to tighten the cylinder lock, and is widely used in vending machines, rockers, and other fields.

[0005]

[Problems to be solved by the device]

 When the cylinder lock is locked, the driver pin engages with the tumbler pin hole of the plug to prevent rotation of the plug and the door cannot be opened.However, when locking the cylinder, a force in the rotation direction is applied to the plug. There was a problem that the cylinder lock was unlocked illegally while picking while adding. For the purpose of preventing such picking, the keyhole is complicated to make it difficult for the picking tool to enter, and the pin is provided with a step so that the shear line cannot be detected, but unauthorized unlocking is completely prevented. I couldn't do it. The present invention aims to solve such problems, and provides a cylinder lock that cannot be unlocked without using a regular key.

[0006]

[Means for Solving the Problems]

 In order to achieve the above object, the present invention provides a driver case in which a driver pin hole is provided in a cylindrical case, a cover plate for covering the driver pin hole is fixed to the outer surface of the case, and the cover plate is inserted into the driver pin hole. A spring is inserted between the pin and the cover plate, and the plug inserted into the inner peripheral surface of the case has a key hole that opens to the front and the driver pin hole that communicates with the key hole and is in the locked position of the plug. And a tumbler pin hole facing each other, a tumbler pin is inserted into the tumbler pin hole, and the tumbler pin pressed by the key inserted in the key hole pushes the end face of the driver pin to the outer peripheral surface of the plug. In the plug, a side bar hole intersecting with the tumbler pin hole is formed, and a side bar inserted into the side bar hole is projected from the plug surface. A recess into which the side bar is inserted when the plug is in the locked position, and a groove parallel to the axial direction of the tumbler pin is provided on the outer peripheral surface of the tumbler pin. The groove is provided with an engagement hole facing the side bar hole when the tumbler pin is pushed by a regular key.

[0007]

[Action]

 When the cylinder lock configured as described above is locked, the driver pin engages with the tumbler pin hole and the plug cannot rotate. The tumbler pin pushed by the driver pin moves in the key hole direction, and the position of the engaging hole is out of the side bar hole. The recess provided on the inner peripheral surface of the case coincides with the side bar hole. Therefore, the tip of the side bar projects from the plug surface and engages with the recess, but the movement of the side bar in the retracted direction is blocked by the groove.

In such a locked state, the driver pin and the side bar prevent the plug from rotating. Therefore, if you try to perform picking while applying rotational force to the plug from the outside, the side bar that receives pressure from the recess of the case presses the groove of the tumbler pin and the movement of the tumbler pin is blocked, making picking impossible. Become.

When a regular key is inserted into the key hole, the engaging hole of the tumbler pin pushed by the key is aligned with the side bar hole, and the end of the driver pin pushed by the tumbler pin is aligned with the shear line. Match. When the key is rotated, the end of the side bar that receives pressure from the recess of the case is inserted into the engagement hole, and the side bar is recessed in the outer peripheral surface of the plug, so the plug rotates to the unlocked position, The door can be opened.

[0010]

【Example】

 An embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a longitudinal sectional view of a cylinder lock in a locked state, and FIG. 5 is an exploded perspective view of a cylinder lock. As shown in FIG. 5, the case 1 is formed in a tubular shape, a flange portion 1a is formed at the front end portion, and a male screw 2 is screwed on the outer peripheral surface of the rear portion. To attach the case 1 to a door (not shown), insert the rear end of the case 1 into the through hole (not shown) of the door from the front of the door, and then install the large nut 3 screwed into the male screw 2 and the collar portion 1a. The door is pinched by.

A plurality of driver pin holes 4 are provided at upper and lower two positions of the case 1 so as to be arranged in parallel to the axial direction of the case 1, and the driver pins of the upper row and the lower row are provided on the outer peripheral surface of the case 1. Cover accommodating grooves 5 that intersect the holes 4 are formed. Then, after the driver pins 6 and the springs 7 are inserted into the respective driver pin holes 4, the cover plates 8 are fixedly attached to the both cover accommodating grooves 5 and 5. Therefore, each tumbler pin 6 pushed by the spring 7 is biased in a direction projecting from the inner peripheral surface of the case (see FIG. 1).

The plug 9 rotatably inserted into the inner peripheral surface of the case 1 communicates with the key hole 10 that opens to the front and the key hole 10, and is inserted into each driver pin hole 4 at the locking position of the plug 9. The tumbler pin holes 11 facing each other are provided, and the tumbler pin 12 is inserted into each tumbler pin hole 11. Further, the plug 9 is provided with a side bar hole 13 which intersects each tumbler pin hole 11 at a substantially right angle, and an accommodating groove 14 which is connected to the side bar hole 13 is provided on the outer peripheral surface of the plug 9 (see FIG. 1).

In the sidebar 15, the rod-shaped portions 15 a inserted into the respective sidebar holes 13 are integrally connected with the connecting portion 15 b, and the connecting portion 15 b and the bottom surface of the housing groove 14 are respectively connected. Two springs 16 are mounted. Therefore, the connecting portion 15b accommodated in the accommodating groove 14 is biased in a direction projecting from the outer peripheral surface of the plug 9 (see FIG. 1).

On the inner peripheral surface of the case 1, a concave portion 17 having an arcuate cross-sectional shape is formed at a position facing the side bar hole 13 when the plug 9 is at the locking position. Therefore, when the cylinder lock is locked, the connecting portion 15b of the side bar 15 is inserted into the recess 17 (see FIG. 1).

The outer peripheral surface of the tumbler pin 12 is provided with a groove 18 parallel to the axial direction of the tumbler pin 12, and the tip of the rod-shaped portion 15 a of the side bar 15 is inserted into the groove 18. An engagement hole 19 is provided in the groove 18 at a position facing the side bar hole 13 when the tumbler pin 12 is pushed by the key K inserted in the key hole 10.

An annular groove 20 is provided around the outer peripheral surface of the plug 9, and a male screw 21 is screwed on an angular shaft portion 9a formed at the rear end of the plug 9 (see FIG. 5). Since the retaining ring 22 is fitted into the annular groove 20 after inserting the plug 6 into the case 1, the plug 9 can rotate with respect to the case 1, but cannot move in the axial direction.

The angular shaft portion 9a is provided with a turning amount regulating cam 23 for limiting the turning of the plug 9 from a locking position to an unlocking position, and a door for locking and unlocking a door by engaging and disengaging with a casing (not shown). The ring 24 and the washer 25 are inserted and fastened by a small nut 26 screwed to the male screw 21.

On the outer peripheral surface of the plug 9, a recess 27 is provided at a position on the upper side in FIG. 5, a steel ball 28 having high surface hardness is inserted into the recess 27, and the plug 9 is inserted into the case 1. At times, the steel ball 28 is sandwiched between the recess 27 and the inner peripheral surface of the case 1. When the shear line is cut by a tool such as a hole saw to break the cylinder tablet, the steel ball 28 having a high surface hardness blocks the cutting of the tool. Reference numeral 29 shown in FIG. 5 is a case ring attached to the collar portion 1 a of the case 1.

The operation of the cylinder lock configured as described above will be described in the order of the locked state, the prevention of picking in the locked state, and the unlocking operation. When the cylinder lock is locked, as shown in FIG. 1, the driver pin hole 4 and the tumbler pin hole 11 overlap each other, so that the driver pin 6 pushed by the spring 7 engages with the tumbler pin hole 11 and the plug 9 Is not rotatable.

The tumbler pin 12 pushed by the driver pin 6 moves in a direction projecting into the key hole 10, and the position of the engaging hole 19 of the tumbler pin 6 is out of the side bar hole 13. Therefore, the movement of the side bar 15 in the retracted direction is blocked by the groove 18. The recess 17 provided on the inner peripheral surface of the case 1 coincides with the side bar hole 13, and the connecting portion 15b of the side bar 15 pressed by the spring 16 protrudes from the outer peripheral surface of the plug 9 and engages with the recess 17. ing.

In such a locked state, the driver pins 6 engaged with the plug 9 and the side bars 15 engaged with the case 1 prevent the plug 9 from rotating. Therefore, as shown in FIG. 4, when picking is performed while applying a turning force R to the plug 9 from the outside, the side bar 15 which receives the pressing force P from the concave portion 17 of the case 1 causes the groove 18 of the tumbler pin 12 to move. Is pressed, the movement of the tumbler pin 12 is blocked, and picking becomes impossible.

When the regular key K is inserted into the key hole 10, as shown in FIG. 2, the engaging hole 19 of the tumbler pin 12 pushed by the key K coincides with the side bar hole 13, and the tumbler pin 13 The end of the driver pin 6 pushed by 12 coincides with the shear line. When the key K is rotated in the unlocking direction, the side bar 15 pushed out from the recess 17 of the case 1 is recessed in the outer peripheral surface of the plug 9, and the tip of the rod-shaped portion 15a is inserted into the engaging hole 19 (see FIG. 3). ), The plug 9 is rotated to the unlocked position, the tongue 24 is separated from the casing, and the door can be opened.

[0023]

[Effect of device]

 Since the present invention is configured as described above, when the cylinder lock is locked, the side bar inserted in the plug engages with the case and prevents the plug from rotating together with the tumbler pin. ing. Therefore, it has a strong crush strength against the rupture of shearing the tumbler pin by applying a rotational force to the plug. In addition, this side bar prevents rotation of the plug unless all the tumbler pins are aligned with the shear line, so it is possible to reliably prevent picking to move the tumbler pins to the shear line one after another while applying rotational force to the plug. . Thus, the anti-theft property of the cylinder lock is improved and the safety is improved.

[Brief description of drawings]

FIG. 1 is a longitudinal sectional view of a cylinder lock in a locked state.

FIG. 2 is a vertical sectional view of a cylinder lock in which a key is inserted.

FIG. 3 is a vertical cross-sectional view of the cylinder lock showing a state in which the key is rotated.

FIG. 4 is a vertical cross-sectional view of a cylinder lock illustrating a force generated when an unauthorized unlocking is attempted.

FIG. 5 is an exploded perspective view of a cylinder lock.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 case 4 driver pin hole 6 driver pin 7 spring 8 cover plate 9 plug 10 key hole 11 tumbler pin hole 12 tumbler pin 13 sidebar hole 14 accommodating groove 15 sidebar 15a rod-shaped part 15b connecting part 16 spring 17 recess 18 groove 19 engagement Hole 23 Rotation amount control cam 24 Tongue

Claims (1)

[Scope of utility model registration request] 1. A driver pin hole is provided in a cylindrical case,
A cover plate that covers the driver pin hole is fixed to the outer surface of the case, and a spring is inserted between the driver pin inserted into the driver pin hole and the cover plate, and the plug is inserted into the inner peripheral surface of the case. And a tumbler pin hole communicating with the key hole and facing the driver pin hole at the locking position of the plug, the tumbler pin is inserted into the tumbler pin hole, and then inserted into the key hole. In a cylinder lock in which the tumbler pin pressed by the key pushes the end face of the driver pin to the outer peripheral face of the plug, a side bar hole intersecting with the tumbler pin hole is formed in the plug and inserted into the side bar hole. The side bar is biased in a direction projecting from the plug surface, and the side bar is pushed to the inner peripheral surface of the case when the plug is in the locking position. Is provided with a recess into which the tumbler pin is inserted, and a ridge groove parallel to the axial direction of the tumbler pin is provided on the outer peripheral surface of the tumbler pin. A cylinder lock characterized in that an engagement hole facing the above is provided.