JP3752661B2 - Disc tumbler tablets - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a disc tumbler lock using a disc tumbler, and more particularly to a disc tumbler lock that simplifies assembly work during manufacturing.
[0002]
[Prior art]
In general, a disk tumbler lock is configured such that a large number of disk tumblers are accommodated in an inner cylinder so as to be movable in the transverse direction of the shaft together with a coil spring, an outer cylinder is fitted on the outer side of the inner cylinder, and an appropriate key is inserted into the inner cylinder. By inserting, the tip of the disk tumbler is pulled back into the inner cylinder, and the engagement of the disk tumbler tip engaged with the inner surface recess of the outer cylinder is released, and unlocked. In each of the slit-shaped tumbler insertion holes, disc tumblers are inserted together with coil springs so as to be movable in the transverse direction of the shaft.
[0003]
[Problems to be solved by the invention]
When assembling a disc tumbler lock when manufacturing this type of lock, insert the disc tumbler together with the coil spring into each tumbler insertion hole in the inner cylinder, and keep the outer cylinder fitted on the outside of the inner cylinder. Work to cover. However, a large number of small piece disk tumblers are inserted into the insertion holes together with small coil springs, and they are stopped at a predetermined position. The work of attaching the outer cylinder to the outside while being pulled back inside is a work that accurately handles very fine parts, is very cumbersome, requires skillful technology, and is an assembly work Since it took time, there was a problem that the assembly workability was very bad.
[0004]
The present invention has been made in view of the above points, and an object of the present invention is to provide a disc tumbler lock in which an inner cylinder and an outer cylinder can be easily assembled at the time of manufacturing, and the assembling workability can be improved. And
[0005]
[Means for Solving the Problems]
In order to achieve the above object, a disc tumbler lock according to the present invention includes an outer cylinder having an inner surface recess, and a plurality of tumbler insertions for inserting a plurality of disc tumblers inside the outer cylinder so as to be rotatable. An inner cylinder having holes arranged in parallel to the axial direction, a plurality of disk tumblers inserted into the tumbler insertion hole of the inner cylinder, and a disk so that the tip of the disk tumbler protrudes into the inner surface recess of the outer cylinder In a disk tumbler lock provided with a coil spring for energizing a tumbler, a drum cover is attached to the outer peripheral portion of the inner cylinder so as to cover a tip opening of the tumbler insertion hole, and the drum cover is opposed to the tumbler insertion hole. A slit-like tumbler projecting hole is formed at a position so as to protrude only through the tip of the disk tumbler.
[0006]
[Action]
When the disk tumbler lock having such a structure is assembled at the time of manufacture, first, the disk tumbler is inserted into each tumbler insertion hole in the inner cylinder together with the coil spring from the opening of the tip thereof into a fixed position in the inner cylinder. In this state, the tip of each disk tumbler protrudes from the tip opening of the tumbler insertion hole in the outer periphery of the inner cylinder. Next, fit the cylinder cover to the outer peripheral part of the inner cylinder so that the tip of each disk tumbler protrudes from the tumbler projection hole, and the engaging part of the edge of the cylinder cover is connected to the outer peripheral part of the inner cylinder. Fit into. In this state, all the disk tumblers and coil springs are mounted at predetermined positions in the inner cylinder, and the disk tumblers and coil springs do not pop out or fall even when moved. When the appropriate key is inserted into the key insertion hole, all the disk tumblers are pulled back into the inner cylinder against the urging force of the coil spring and can be inserted into the outer cylinder. The inner cylinder is inserted into the fixed position, and the inner cylinder is stopped with a stop spring or a stop pin so that the inner cylinder can be rotated and prevented from moving in the axial direction.
[0007]
In this way, if each disc tumbler is inserted into each tumbler insertion hole of the inner cylinder and fitted so that the outer cover of the inner cylinder is covered, a small disc tumbler or coil spring is displaced. The appropriate key can be easily inserted into the key insertion hole of the inner cylinder without dropping, and the inner cylinder unit can be moved into the outer cylinder by pulling the protruding disc tumbler back into the inner cylinder. Inserted into and locked in a rotatable manner.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings. 1 shows a front view of the disc tumbler lock, FIG. 2 shows a rear view thereof, FIG. 3 shows a longitudinal sectional view of the lock in the axial direction, and FIGS. 4 to 6 show transverse sectional views thereof.
[0009]
Reference numeral 3 denotes an outer cylinder of the disk cylinder lock, which is formed in an elongated shape so as to accommodate the inner cylinder unit 1 and the lock shaft 7 connected to the inner cylinder unit inside, and is provided with a mounting flange 3b at the end. Further, a circumferential groove 3c having a part thereof as a through-hole is formed on the outer periphery of the intermediate portion of the outer cylinder 3, and a stop spring 8 is fitted into the circumferential groove 3c as shown in FIG. The inner cylinder unit 1 inserted in is rotatably stopped at a predetermined position. As shown in FIGS. 5 and 6, an inner surface recess 3 a is formed on a part of the inner surface of the outer cylinder 3 into which the inner cylinder unit 1 is inserted, as shown in FIGS. 5 and 6. Shaped to receive and engage.
[0010]
The inner cylinder unit 1 includes a coil spring in which a plurality of disc tumblers 4 are slidably movable in a tumbler insertion hole 23 as shown in FIGS. 4 to 6 in an inner cylinder 2 having a shape as shown in FIGS. 6 is energized and accommodated, and the tip opening 24 of the tumbler insertion hole 23 is covered with the trunk cover 5 of FIG.
[0011]
That is, as shown in FIGS. 9 to 11, the inner cylinder 2 has a key insertion hole 21 on the front side, and is a slit-shaped tumbler at a constant interval in the inner transverse direction (on a plane perpendicular to the axial direction). An insertion hole 23 is formed in the inner cylinder 2 in parallel. These tumbler insertion holes 23 are opened on both side surfaces of the inner cylinder 2, and the front end opening 24 on the left side in FIG. 9 is formed larger than the opening on the right side in FIG. Each disc tumbler 4 can be inserted into each tumbler insertion hole 23.
[0012]
In addition, a coil spring insertion hole 25 is formed adjacent to each tumbler insertion hole 23 in the inner cylinder 2. As shown in FIGS. 5 and 6, the coil spring 6 is disposed in the coil spring insertion hole 25 so as to bias the disc tumbler 4 toward the inner surface recess 3 a of the outer cylinder 3. Furthermore, a guide projection 22 for guiding the movement of the key is formed inside the inner cylinder 2. Furthermore, the front end opening 24 for inserting the coil spring 6 and the disk tumbler 4 into the inner cylinder 2 is covered with a case cover 5 as shown in FIG. Is fitted to the side of the inner cylinder 2, and a locking groove 26 is formed in the axial direction of the outer peripheral surface of the inner cylinder 2.
[0013]
As shown in FIG. 12, the body cover 5 is formed by bending a thin metal plate (a stainless steel plate having a thickness of about 0.5 mm) into an arc shape and having spring elasticity, and a slit-like tumbler projection hole 5b is formed in the tumbler. Corresponding to the insertion holes 23, they are formed in parallel at a predetermined interval. These tumbler projecting holes 5b are formed to have a size capable of projecting only the tip portion 4a of each disk tumbler 4 to the outside. Further, the positioning cover 29 is formed on both sides of the front end opening portion 24 in order to fit the protruding portion 5c.
[0014]
On the other hand, a circumferential groove 27 is formed in the outer peripheral portion of the inner cylinder 2, and a retaining spring 8 for positioning the inner cylinder 2 in the outer cylinder 3 and rotatably locking it in the circumferential groove 27. Is inserted. Further, a rectangular connecting portion 28 is formed at the end of the inner cylinder 2 so as to be fitted and connected to the tip of the lock shaft 7. As shown in FIGS. 5 and 6, the disk tumbler 4 inserted into each tumbler insertion hole 23 in the inner cylinder 2 is formed with a substantially rectangular key insertion hole 4d into which a key is inserted. A protruding tip 4a is formed, and is stopped by a spring stopper 4b for stopping the coil spring 6 near the base of the tip 4a and a protruding hole 5b of the body cover 5 to prevent further protrusion. A portion 4c is provided.
[0015]
Further, in the key insertion hole 4d inside the disc tumbler 4, convex portions corresponding to the key ridges of the unlocking key are provided on both sides for the normal key and the master key, and according to the height of the key ridge. An unlock key is created.
[0016]
The disc tumbler lock configured as described above is assembled as follows at the time of manufacture. First, the disc tumbler 4 and the coil spring 6 are inserted into the tumbler insertion holes 23 and the coil spring insertion holes 25 in the inner cylinder 2 shown in FIGS. At this time, the coil spring 6 is first inserted into the coil spring insertion hole 25, and is inserted into the tumbler insertion hole 23 so that the spring stopper 4 b of the disk tumbler 4 contacts the tip of the coil spring 6. In this state, the distal end portion 4 a of each disk tumbler 4 protrudes from the distal end opening 24 of the tumbler insertion hole 23 on the outer peripheral portion of the inner cylinder 2.
[0017]
Next, the case cover 5 shown in FIG. 12 is fitted to the outer peripheral portion of the inner cylinder 2 so that the tip end portion 4a of each disk tumbler 4 protrudes from the tumbler protruding hole 5b. The engaging portion 5a is fitted into the engaging groove 26 on the outer peripheral portion of the inner cylinder 2. At this time, since the trunk cover 5 has spring elasticity, the locking portion 5a is locked only by pressing from the outer peripheral direction of the inner cylinder 2, and the positioning convex portion 5c protruding inward is the inner cylinder 2. It is accurately positioned by being fitted into the side fitting hole 29 and can be easily attached. In this state, all the disk tumblers 4 and the coil springs 6 are mounted at predetermined positions in the inner cylinder 2, and if the appropriate key K is inserted into the key insertion hole 21 as shown in FIGS. In addition, all the disk tumblers 4 are pulled back into the inner cylinder 2 against the urging force of the coil spring 6 so that they can be inserted into the outer cylinder 3.
[0018]
The inner cylinder unit 1 assembled in this way is inserted into the outer cylinder 3 with the lock shaft 7 connected to the connecting portion 28 at the end thereof. Alternatively, the lock shaft 7 is inserted into the outer cylinder 3 in a state where the lock shaft 7 is inserted into the outer cylinder 3 first, and is connected to the tip of the lock shaft 7 through the connecting portion 28 inside. 3 and 4, a retaining spring 8 is fitted in the circumferential groove 3c of the outer peripheral portion of the outer cylinder 3, and the inner cylinder 2 is rotatably supported in the outer cylinder 3 to prevent movement in the axial direction. The assembly of the disc tumbler lock is completed.
[0019]
In this way, each disc tumbler 4 is inserted into each tumbler insertion hole 23 of the inner cylinder 2, and the coil spring 6 is inserted into each coil spring insertion hole 25. If the disc tumbler 4 and the coil spring 6 are fitted so as to be covered, the appropriate key can be easily inserted into the key insertion hole 21, and the protruding disc tumblers 4 can be brought back into the inner cylinder, and in such a state, the operation of inserting the inner cylinder unit 1 into the outer cylinder 3 and locking it rotatably can be easily performed. Can do.
[0020]
A disc tumbler lock having such a long and outer cylinder 3 having a mounting flange 3b is used, for example, in a locking device for a door of a game machine such as a slot machine, and is not shown at the protruding tip of the lock shaft 7. The cam is fixed, and the cam is linked to other members of the locking device so as to rotate and unlock. When an appropriate key K is inserted into the key insertion hole 21, all the disk cylinders 4 are pulled back into the inner cylinder 2, and the state shown in FIG. 6 is obtained. The inner cylinder 2 is rotated together with the key K in an arbitrary direction to unlock. Can be operated. When the key K is pulled out from the key insertion hole 21, the front end 4 a of the disk cylinder 4 protrudes from the inner cylinder 2 into the inner surface recess 3 a of the outer cylinder 3 by the biasing force of the coil spring 6, thereby preventing the inner cylinder 2 from rotating. Locked.
[0021]
【The invention's effect】
As described above, according to the disk tumbler lock of the present invention, in a state where each disk tumbler is inserted into each tumbler insertion hole of the inner cylinder, the outer cover of the inner cylinder is fitted so as to cover the trunk cover. For example, the small disk tumblers and coil springs will not be displaced or fall from the predetermined position. The subsequent operation, that is, the appropriate key is inserted into the key insertion hole of the inner cylinder, and the tip of each disk tumbler is inserted into the inner cylinder. Can be easily pulled back, and if the tip of each disc tumbler is pulled back into the inner cylinder, the inner cylinder unit can be easily inserted into the outer cylinder and rotated with a stop spring, etc. The disc tumbler lock can be easily assembled in a short time without requiring skilled techniques for assembly.
[Brief description of the drawings]
FIG. 1 is a front view of a disc tumbler lock showing an embodiment of the present invention.
FIG. 2 is a rear view of the disc tumbler lock.
FIG. 3 is a cross-sectional view along the axial direction of the disc tumbler lock.
4 is a cross-sectional view taken along the line IV-IV in FIG. 3;
5 is a cross-sectional view taken along VV in FIG.
FIG. 6 is a VV cross-sectional view in a state where the disc tumbler is pulled back.
7 is a side view of the inner cylinder unit 1 and the lock shaft 7. FIG.
8 is a side view with a partial cross section of the inner cylinder unit 1 and the lock shaft 7. FIG.
9 is a left side view of the inner cylinder 2. FIG.
10 is a right side view of the inner cylinder 2. FIG.
11 is a cross-sectional view along the axial direction of the inner cylinder 2. FIG.
12 is an enlarged perspective view of the trunk cover 5. FIG.
[Explanation of symbols]
1-Inner cylinder unit 2-Inner cylinder 3-Outer cylinder 3a-Inner surface recess 4-Disc tumbler 4a-Tip part 5-Body cover 5a-Locking part 5b-Tumbler projection hole 6-Coil spring 23-Tumbler insertion hole 24 -Tip opening

Claims (2)

An outer cylinder having an inner surface recess, and an inner cylinder formed by arranging a plurality of tumbler insertion holes, which are rotatably inserted into the outer cylinder and inserted into the inner side, perpendicular to the axial direction. A plurality of disc tumblers inserted into the tumbler insertion hole of the inner cylinder, and a coil spring that biases the disc tumbler so that a tip end portion of the disc tumbler projects into an inner surface recess of the outer cylinder. In the provided disc tumbler lock,
A cylinder cover is attached to the outer periphery of the inner cylinder so as to cover the tip opening of the tumbler insertion hole, and a slit-like tumbler projection hole is formed on the cylinder cover at a position facing the tumbler insertion hole. A disc tumbler tablet characterized by being formed so as to be able to protrude through only the tip of the tumbler. The body cover is formed by bending a metal plate having spring elasticity into an arc shape along the outer peripheral surface of the inner cylinder, and is engaged with locking grooves in the outer peripheral part of the inner cylinder at both side edges of the cylinder cover. 2. The disk according to claim 1, wherein a locking portion to be formed is formed, and a projection for positioning is provided on the cylinder cover so as to be fitted into a positioning hole provided in an outer peripheral portion of the inner cylinder. Tumbler tablets.

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