JPH076408Y2 - Cylinder lock - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a cylinder lock.

(Prior Art) As a cylinder lock of this kind, as disclosed in, for example, Japanese Patent Publication No. Sho 55-34272 or Japanese Utility Model Publication No. 57-11094, a key is formed on one side surface of the plate key along its length direction. It is known that a guide groove having peaks is formed.

(Problems to be solved by the invention) However, in this case, the tumblers guided by the guide grooves are mutually repulsed by springs when the former is used.
Since it is formed in a pair and is pulled against the spring through the operation protrusion guided in the guide groove, the assembly of the pair of tumblers repulsed by the spring becomes complicated, and the latter However, the tumbler was a full tumbler, so there was an inconvenience that the key number could not be increased.

The present invention aims to improve such inconvenience.

(Means for Solving the Problems) Means of the present invention for achieving the above-mentioned object include a body and an axial key insertion hole that is rotatably fitted in the body and is centered. A rotor having a plurality of tumbler insertion holes orthogonal to the key insertion hole, and a tumbler elastically spring-loaded to be fitted into the tumbler insertion hole of the rotor and engage with a locking groove provided in the body. A cylinder lock comprising an inner toothed key having guide ridges on the left and right side surfaces of key ridges to be released from the locking groove against the spring of the tumbler. A ridge is provided, and a central portion through which the ridge can enter and a separate key mountain on the upper and lower inner surfaces are provided in guide grooves on both sides of the internal tooth key, and the tumblers are fitted in left and right pairs into the tumbler insertion hole. Formed into a half tumbler In addition, each half tumbler is provided with an engaging projection that engages with the key ridges above and below the guide groove.

(Operation) According to the present invention, the pair of left and right half tumblers inserted into the tumbler insertion holes by the above means are pulled into the rotor against the spring by the key ridges on the lower left and right of the guide groove of the internal tooth key. It will be unlocked.

(Example) This will be described with reference to the illustrated example. (1) is a body,
Reference numeral (2) shows a rotor, and a key insertion hole (3) is formed at the center of the rotor (2) in the axial direction, and a plurality of tumbler insertion holes (4) are orthogonal to the key insertion hole (3). The insertion holes (4) are formed by arrows inserted in the mold in which the rotor (2) is to be cast in a removable manner.

As shown in FIGS. 1 and 2, the key insertion hole (3) has internal toothed keys (21) provided with key ridges separately on the upper and lower inner surfaces of the guide grooves (20) on the left and right sides, respectively. It is formed in a rectangular cross section so that it can be guided by the side surface, and inside the key insertion hole (3),
A ridge (6) having a reference surface (5) on the end surface, which is brought into contact with the rear end orthogonal surface (20a) of the guide groove (20) of the inner tooth key (21) to match the pitch interval between the key crest and the tumbler. The tumbler insertion hole (4) for inserting the tumbler (8) is provided in the key insertion direction, and the inner tooth key (21) is provided as shown in FIG.
Half tumblers (8a) (8) having engaging protrusions (7) that can engage with the key ridges formed in the guide groove (20) of
a) is formed into a pair of sliding holes (4a) (4a) separated by guide walls (9) provided above and below the explanation key insertion hole (3), and the sliding holes are formed. (4a) and (4a) have stepped portions (12) and (12) that support springs (11) and (11) between the spring bearings (10) and (10) provided in the half tumblers (8a) and (8a). The sliding surfaces of the half tumblers (8a) (8a) and the vertically extending recessed grooves (13) (13) are provided, and these sliding holes (4) are provided at the end of the tumbler on the insertion side.
A communication passage (14) is provided to connect a) and (4a).

Thus, the sliding holes (4a) (4a) have the concave grooves (13) (13) to reduce the contact surface with the half tumbler (8a) to smooth the sliding of the tumbler and to remove foreign matter such as dust and dust. The groove (1
3) to the outside to prevent deterioration of sliding of the tumbler, and to increase the strength of the arrow inserted into the rotor (2) when the tumbler insertion hole (4) is formed by the communication passage (14). did. Further, the half tumbler (8a) is provided with a guide protrusion (15) which abuts on the guide wall (9) and restricts the inclination thereof.

In the figure, (16) shows a tumbler engagement groove provided in the body (1), and the tumbler (8) fitted into each tumbler insertion hole is fitted into the adjacent insertion hole in the engagement groove (16). It is provided above and below the diametrical direction so that they can be assembled by being biased by springs so as to alternately project with the inserted ones in the opposite direction and engaged with each other.

3 and 4 show the tumbler insertion hole (4),
The figure shows the rotor (2) part as viewed from above in FIG. 1, and FIG. 4 as viewed from below. The communication passage (14) has tumbler sliding holes (4a) (4a) on both sides in the vertical direction of FIG. ) Are formed so as to communicate with each other, and the recessed grooves (13) (13) formed in the sliding surface of the tumbler in the plate thickness direction are formed so as to penetrate the rotor.

As shown in FIG. 5, the guide groove (20) of the internal tooth key (21) has a central portion (20) into which the protrusion (6) can enter.
b) and separate key ridges (2
0c) and (20d) are provided.

Thus, according to the present invention, since the tumbler (8) engaging with the guide groove (20) of the internal tooth key (21) is formed into the half tumblers (8a) (8a), each half tumbler (8a) ) (8a) makes the peaking difficult and improves the anti-theft property, and facilitates the incorporation into the tumbler insertion hole (4), and furthermore, each half tumbler (8a) (8a)
a) In the key guide groove (20), each different key mountain (20c) (20
Since the engagement protrusion (7) that engages with d) is provided, it is possible to easily increase the number of types of key No.

In addition, by providing ridges (6) on both sides of the center of the key insertion hole (3), the rear end reference surface (5) and the diameter surface (20
Since a) and a pitch of the tumbler are matched by abutting with a), it is necessary to have a stepped key shape in which the stepped portion and the front surface of the rotor are brought into contact with each other, because the key has a generally stepped shape. It allows for a simple straight-shaped key design.

Further, since the key insertion hole (3) is narrowed by providing the ridge (6), it is difficult to unlock the key illegally.

Further, since the insertion hole (4) of the half tumbler (8a) is made to communicate with each other, the arrow (pulling pin) that is inserted / removed at the time of casting the rotor can be made into a flat plate shape, its strength is increased and durability is improved. .

Further, since the concave groove (13) is formed on the sliding surface of the tumbler insertion hole (4) in the thickness direction of the tumbler plate, foreign matters such as dust and dust entering from the outside through the key insertion hole (4) can be discharged from the concave groove (13). Since it can be discharged to the outside and dust does not collect on the sliding surface of the tumbler and the tumbler insertion hole (4), it is possible to solve the problem that the tumbler does not move up after removing the key.

(Effect of the Invention) As is apparent from the above description, the present invention has the advantage that a large number of tumblers can be provided because the internal toothed key having the key ridges separately on the left, right, up and down can be used. In addition, the internal toothed key and the narrowed key insertion holes by providing the key insertion holes on both sides make it difficult to insert a proper tool to align the tumblers and to unlock the keys incorrectly. It has an advantage that the safety is extremely improved.

[Brief description of drawings]

The drawings show one embodiment of the present invention. FIG. 1 is a cross-sectional view, FIG. 2 is a cross-sectional view taken along the line AA in FIG. 1, and FIG.
-B line arrow view, FIG. 4 is a CC line arrow view of FIG. 1, and FIG. 5 is a perspective view of the key. (1) ... Body, (2) ... Rotor (3) ... Key insertion hole, (4) ... Tumbler insertion hole (4a) ... Sliding hole, (5) ... Reference surface (6) ... Ridge, (7) ... Engagement protrusion (8) ... Tumbler, (8a) ... Half tumbler (9) ... Guide groove, (11) ... Spring (13) ... Recessed groove, (14) ... Communication groove (20) ... Guide groove, (20a )… Orthogonal plane (20b)… Center part, (20c) (20d)… Key crest (21)… Internal tooth key

Claims (3)

[Scope of utility model registration request] 1. A rotor having a body and a plurality of tumbler insertion holes which are rotatably fitted in the body and have an axial key insertion hole in the center and which are orthogonal to the key insertion hole. A tumbler which is inserted into the tumbler insertion hole of the rotor and springs out by a spring so as to engage with a locking groove provided in the body, and a key mountain which is to be separated from the locking groove against the tumbler. In a cylinder lock consisting of inner toothed keys formed as guide grooves on both left and right sides, a protrusion extending in the key insertion direction is provided at the center of both sides of the key insertion hole, and the protrusions are formed in the guide grooves on both sides of the inner toothed key. Is provided with a central portion through which the tumblers can enter and separate key ridges on the upper and lower inner surfaces, and the tumblers are formed into half tumblers that are fitted in a pair of left and right inside the tumbler insertion holes. Separately engaged in Key Mountain Cylinder lock, characterized in that a engagement projections. 2. The tumbler insertion hole is formed in a pair of sliding grooves separated by a guide wall formed in the key insertion hole and a communication groove communicating with one end of the sliding groove. Cylinder lock according to claim 1 of the utility model registration claim. 3. The cylinder lock according to claim 1, wherein concave grooves extending vertically are formed on both side surfaces of the sliding groove.