JPH0329494Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) The invention relates to an interlock device consisting of a lock bar that is slidably fitted into the main body and a locking mechanism that locks the lock bar so that it cannot be removed. .

(Prior Art) Although there has been an interlock device in which a lock bar and a key of a locking mechanism are mutually restrained, there has been a need for a device that is more secure and has a simpler internal structure.

(Problems to be Solved by the Invention) Therefore, the purpose of the invention is to provide a mechanism that is simply and robustly configured to prevent the key from being removed from the lock mechanism when the lock bar is removed, and to provide safety against unauthorized unlocking. The object of the present invention is to provide an interlock device with high performance.

(Means for Solving the Problem) The interlock device of the present invention will be explained below using reference numerals in the attached drawings. The interlock device of the present invention has a lock bar 2 fitted into a main body 1, and a rotor 3 that partially intersects with the lock bar. A locking mechanism 4 arranged as shown in FIG.
A key 5 for unlocking the rotor 3 to the main body of the lock mechanism 4 and operating the rotor 3, a slide bar 6 located inside the main body 1 and in contact with the tip 2a of the lock bar 2, and a key 5 that covers the slide bar 6. A lock cylinder 7, a small ball 8 inserted into a radial through hole 7a of the lock cylinder 7, a guide bar 9 that slides and guides the lock bar 2, slide bar 6, and lock cylinder 7, and the tip thereof. 9a, a slide spring 11 that pushes the guide bar 9 and the slide bar 6 in opposite directions, and a bar spring 12 that pushes the guide base 10 and the lock cylinder 7 in the opposite direction. A recess 2b is provided on the circumferential surface of the lock bar 2, which receives a part of the circumferential surface of the rotor and allows the rotor 3 to rotate, while a flat portion closely faces the circumferential surface of the lock bar 2 and allows the lock bar 2 to slide. 3a is provided on the circumferential surface of the rotor 3, and a recess 6a that receives a part of the circumferential surface of the small ball 8 and allows the slide bar 6 and the lock cylinder 7 to slide together.
is provided on the circumferential surface of the slide bar 6, and when the lock bar 2 is in the restraining position, the recess 2 of the lock bar 2
b is engaged with the circumferential surface of the rotor 3 to prevent the lock bar 2 from sliding, and a part of the circumferential surface of the small ball 8 is fitted into the recess 6a of the slide bar 6 to slide the slide bar 6 and the lock cylinder 7. On the other hand, when the lock bar 2 is in the unrestricted position, the flat part 3a of the rotor 3 is brought close to face the circumferential surface of the lock bar 2 to prevent the rotor 3 from rotating to the key extraction position.
A part of the circumferential surface of the main body 1 is fitted into the groove 1b of the main body 1 to prevent the slide bar 6 and the lock cylinder 7 from sliding.

(Function) When the lock bar 2 is inserted into the insertion hole 1a of the main body 1 when the key 5 is in the locked position, the guide bar 9 enters the guide hole 2e of the lock bar 2, and while guiding the lock bar 2, the stepped surface 2c of the lock bar 2 is inserted. The rear end 6b of the slide bar 6 is pushed and the small ball 8 enters the recess 6a of the slide bar 6 by sliding of the slide bar 6. Next, the end face 2b of the lock bar 2
When the user pushes the rear end 7b of the lock cylinder 7, the slide bar 6, lock cylinder 7 and small ball 8 slide together in the same direction, the slide spring 11 is compressed by the slide bar 6, and the lock is released. The bar spring 12 is compressed by the cylinder 7, and as shown in FIG.
The front end 7c of the lock cylinder 7 contacts the front end 9a of the lock cylinder 7.
comes into contact with the end of the guide base 10 and comes to rest.

At this time, the concave portion 2b of the lock bar 2 comes to a position facing the flat portion 3a of the rotor 3, so when the rotor 3 is rotated 90 degrees with the key 5, the circumferential surface of the lock bar 3 is exposed as shown in FIG. A part of the recess 2
Enter b. When the key 5 is removed from the main body 1 and the rotor 3 is locked with respect to the main body 1, the lock bar 2 is restrained so that it cannot be slid.

In this way, when the lock bar 2 is in the locking position, insert the key 5 again and move it 90 degrees in the opposite direction to the previous operation.
When the flat part 3a of the rotor 3 is made to face the concave part 2b of the lock bar 2 as shown in FIG.
When the lock bar 2 is released from the lock bar 2 by the rotor 3, the slide bar 6 is moved to the slide spring 1.
1, the lock cylinder 7 is pushed back by the bar spring in a direction opposite to the insertion direction of the lock bar 2, and at the same time, the lock bar 2 is also pushed back in the same direction. Then, the small ball 8 slips out of the recess 6a of the slide bar 6 and enters the groove 1b of the main body 1, while the end 7d of the through hole 7 protruding from the lock cylinder 6 and the side surface 1c of the groove 1b inside the main body 1 The engagement prevents the bar spring 12 from sliding the lock cylinder 7, and the engagement between the rear protruding wall 6d of the slide bar 6 and the rear inner wall 7e of the lock cylinder 7 prevents the lock cylinder 7 from sliding. This prevents the slide bar 6 from sliding due to the spring 11.

At this time, since the flat portion 3a of the rotor 3 closely faces the circumferential surface of the lock tube 7 as shown in FIG. 6, the key 5 inserted and connected to the rotor 3 returns to the only key insertion/extraction position. Therefore, the key 5 cannot be removed from the main body 1.

In this way, when the lock bar 2 is in the unrestrained state, the key 5 is restrained and held by the main body 1;
When the lock bar 2 is in the unrestricted position, the lock bar 2 is restrained and held by the main body 1.

(Example) In the present invention, the distance from when the slide bar 6 starts to slide until the lock cylinder starts to slide, and when the lock bar 2 is in an unrestrained state, the slide starts from the point where the small ball 8 and the slide bar 6 touch. Recess 6a of bar 6
If the distances from the lock bar 2 to the center point are not equal, the rotor 3 can be rotated by inserting the lock bar 2, and the key 5 cannot be removed.

This includes the stepped surface 2 of the tip 2a of the lock bar 2.
The drop between c and the end face 2d has an important meaning, and unless it takes a specific value, it will not be possible to unlock the rotor 3 and remove the key 5. Therefore, unauthorized unlocking using a rod-shaped member other than the lock bar is prohibited. is extremely difficult or impossible.

The guide bar 9 is held in a floating state by two springs and smoothly guides the lock bar 2, slide bar 6, etc. in a sliding manner.

In the illustrated embodiment, a pin tumbler lock structure consisting of a driving pin 13, a driven pin 14, and a biasing coil spring 15 is used to lock the rotor 3 to the main body of the locking mechanism 4. It is not limited to this, and any known material can be appropriately selected and used.

(Effects of the invention) As described above, the interlock device of the invention has
The rotor 3 of the locking mechanism 4 and the lock bar 2 are arranged so as to partially intersect with each other, and the recess 2b on the circumferential surface of the lock bar 2
A part of the circumferential surface of the rotor 3 is engaged with the rotor 3 to restrain the lock bar 2 so that it cannot be removed, and when the lock bar 2 is in the detached state, the flat part 3a of the circumferential surface of the rotor 3 is engaged with the circumferential surface of the lock cylinder 7. The rotor 3 is prevented from rotating by facing the key 5 closely, thereby restraining the key 5 so that it cannot be removed.However, unless a lock bar 2 of a specific size and shape is inserted, the rotor 3 will not move to the key extraction position. As a safety mechanism that makes rotation operation impossible, there is a slide bar 6 that contacts the tip 2a of the lock bar 2, a lock cylinder 7 that covers the slide bar 6, and a slider inserted into the radial through hole 7a of the lock cylinder 7. The interlock device of the present invention has a structure in which the main element is a movably inserted small ball 8, and this structure is simple and sufficiently robust, and its operation is reliable. has a very high resistance to unauthorized unlocking, and has great practical value.

[Brief explanation of the drawing]

The drawings show an interlock device according to an embodiment of the present invention; FIG. 1 is a cross-sectional view of the lock bar in a locked state, and FIG. 2 is a cross-sectional view of the lock bar in a locked state. FIG. 3 is a front view of the lock bar in a restrained state, and FIG. 4 is a bottom view of the lock bar in a restrained state. Figure 5 is a front view when the key is inserted into the rotor and the rotor is rotated 90 degrees in the lock bar restrained state shown in Figure 3, and Figure 6 is a bottom view with the lock bar removed and the key restrained. It is. 1...Body, 1b...Groove, 2...Lock bar,
2b... recess, 2c... stepped surface, 2d... end surface, 2
e... Guide hole, 3... Rotor, 3a... Flat part, 4... Lock mechanism, 5... Key, 6... Slide bar, 6a... Recess, 7... Lock cylinder, 7a... Through hole , 8... Small ball, 9... Guide bar, 10...
Guide base, 11...Slide spring, 1
2... Bar spring, 13... Drive pin, 14
... Driven pin, 15 ... Biasing coil spring, 16
...Fixing hole.

Claims (1)

[Scope of utility model registration request] A lock bar 2 that is fitted into the main body 1, a lock mechanism 4 arranged such that the rotor 3 partially intersects with the lock bar, and a key 5 for unlocking the rotor 3 to the main body of the lock mechanism 4 and rotating the rotor 3. , a slide bar 6 located inside the main body 1 and in contact with the tip 2a of the lock bar 2, and the slide bar 6
a lock cylinder 7 covering the lock cylinder 7; a small ball 8 inserted into the radial through hole 7a of the lock cylinder 7; the lock bar 2, the slide bar 6 and the lock cylinder 7;
The guide bar 9 that slides and guides the guide bar 9 and its tip 9a
It consists of a guide base 10 provided on the main body 1 so as to come into contact with the main body 1, a slide spring 11 that pushes the guide bar 9 and the slide bar 6 in opposite directions, and a bar spring 12 that pushes the guide base 10 and the lock cylinder 7 in the opposite direction. A recess 2b is provided on the circumferential surface of the lock bar 2 to receive a part of the circumferential surface of the rotor and allow the rotor 3 to rotate. A flat part 3a that allows sliding is provided, and a recess 6a is provided on the circumferential surface of the slide bar 6 to receive a part of the circumferential surface of the small ball 8 and allow the slide bar 6 and the lock cylinder 7 to slide together. When the lock bar 2 is in the restraining position, the circumferential surface of the rotor 3 is engaged with the recess 2b of the lock bar 2 to prevent the lock bar 2 from sliding;
A part of the circumferential surface of the small ball 8 is inserted into the recess 6a of the slide bar 6.
When the lock bar 2 is in the unrestricted position, the flat part 3a of the rotor 3 is brought close to the circumferential surface of the lock bar 2 so as to allow the slide bar 6 and the lock cylinder 7 to slide. This interlock device prevents the key from rotating to the key extraction position, and a part of the circumferential surface of the small ball 8 is fitted into the groove 1b of the main body 1 to prevent the slide bar 6 and the lock cylinder 7 from sliding.