JP3367923B2 - Standard key - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a key inserted into a keyway of a cylinder lock, and more particularly, to a key change operation within a normal lock / unlock operation range. in the cylinder lock, which was to allow the inner, about the standard key that was not allowed to be invalid key change operation in normal unlocking operation. As shown in FIGS. 10 to 11, a conventional cylinder lock 1 capable of key change operation includes a cylindrical outer cylinder 2, a washer 3 and a ring 4 provided in the outer cylinder 2. As shown in FIG.
The inner cylinder 5 having the key groove 5c along the axial direction and the spring 6 which is provided in the inner cylinder 5 and counteracts the stop plate 6a is always moved into the key groove 5c. A plurality of staggered columnar tumblers 7 to be arranged, a cylindrical collar 7 a fitted to the tumbler 7, and slidable in a direction orthogonal to the tumbler 7 in the inner cylinder 5. A side bar 8 for locking, a side bar 9 for key change, and a change collar 10 for allowing or preventing sliding in the inner cylinder radial direction for key change of the side bar 9 for key change. What is generally comprised is known (Japanese Patent No. 2968965). On the inner peripheral wall surface of the outer cylinder 2, FIG.
A groove 2a having the same shape into which the triangular spire portion 8b at the distal end of the locking side bar 8 is dropped is engraved over the required length along the cylinder axis direction. Further, a groove 2b for the change collar 10 is engraved along the axial direction on the lower side so as to secure a required slide amount as compared with the length of the main body portion 10a of the change collar 10. As shown in FIG. 12, the change collar 10 has a main body portion 10a, a concave portion 10b provided on the upper surface of the main body portion 10a, and a curved portion extending in the circumferential direction from the front portion of the main body portion 10a. Guide portion 10c and the guide portion 10
and a spring hole 10d formed in the middle of the rear side wall surface of c. In FIG. 10, the outer cylinder 2 is provided with a circumferential groove 2c for accommodating the guide portion 10c, and the change collar 10 is slid by a predetermined amount to the rear of the cylinder lock 1 as shown in FIG. The necessary groove width is secured. Further, the spring hole 10d of the guide portion 10c.
A hole is provided at the position of the circumferential groove 2c of the outer cylinder 2 corresponding to the above, and a spring 11 is provided here. The change collar 10 is always slid forward of the cylinder lock 1 by the urging force of the spring 11. As shown in FIG. 13, the key change operation is performed by using the standard adapter 16 and the key adapter 15 as shown in FIG.
And insert both into the keyway 5c of the cylinder lock 1. With the standard key 16, the height and direction are all aligned in the side bar holes 7 d of the tumblers 7. Then, the projection 1 of the key adapter 15
By 5b, the change collar 10 is pushed in a predetermined amount in the sliding direction (rearward) against the urging force of the spring 11 (see FIGS. 10 and 12). As a result, the positions of the three recesses 10b in the main body 10a of the change collar 10 are slid to the key change position. The standard key 16 and key adapter 15 are rotated 90 ° clockwise. This state is the key organization possible state shown in FIG. In this state, the change collar 10 is maintained in the slid state, and the key change side bar 9 is
Since the positions of the spiers 9b and the three recesses 10b are aligned, the spiers 9b are urged by the urging force of the spring 14.
Is dropped into the recess 10b and slides downward. As a result, the key change sidebar 9
Leg portions 9c and 9d will slide downward,
As a result, the spherical body 12 as the fixing member can come out of the hole 7e of the collar 7a in the space formed. As a result, the engagement relationship between the collar 7a and the tumbler 7 is released, and the leg portions 8c, 8d of the locking side bar 8 enter the side bar hole 7d of the collar 7a and are engaged. The tumbler 7 can move in the left-right direction, whereas the collar 7a cannot move in the left-right direction due to the relationship
In addition, it can freely rotate around the axis of the tumbler 7. Therefore, the standard key 16 and the key adapter 15 are pulled out from the key groove 5c. And
Instead, a new key is inserted into the keyway (the key adapter 15 is not necessary). Each tumbler 7 is knitted to a new height and angle according to the new key pile cut. However, in the above key change operation, the key adapter 15 is always required, and there is an inconvenience that the key change operation cannot be performed unless the key adapter is at hand. Further, if the standard key is inserted into the key groove, a thin rod-like body is inserted under the key, and the change collar 10 is pushed in, there is a possibility that an illegal key change is performed. The change key and the standard key according to the present invention are proposed to solve such problems. The gist for solving the above-mentioned problems of the standard key according to the present invention is that a part of a key inserted into a key groove of a cylinder lock is provided with a tumbler.
The engagement with the collar fitted to the tumbler is unlocked
The change color that can be released in the key change position
Change key to push into the machine to create a new key
So that the push-in means provided in the
Closing means for closing the pushing passage groove provided in
Is provided . In the case of the standard key according to the present invention, when the standard key is inserted into the key groove at the locked position, the closing means passes through the pushing passage groove through which the pushing means of the key groove passes. Can be prevented, and an unauthorized act of pushing the change collar into the key change position by inserting a rod-like body or the like from the pushing passage groove can be prevented. DETAILED DESCRIPTION OF THE INVENTION Next, will be described with reference to the drawings engagement Angeles Tandadoki the present invention. In order to facilitate understanding of the invention, portions corresponding to the conventional example are denoted by the same reference numerals as those of the conventional example. [0017] The change key 20, as shown in FIG. 1,
In a part of the metal key 21, for example, on the back, the engagement between the tumbler 7 in the cylinder lock 1 shown in FIG. 12 and the collar 7a slidably fitted to the tumbler 7 is released in the unlocked state. An L-shaped protrusion 22 is provided as a pushing means for pushing the change collar 10 to be made into the key change position. As shown in FIG. 2, the projection 22 is inserted into a pushing passage groove 5d provided in the lower part of the key groove 5c on the front surface of the cylinder lock 1 so that the projection 22 passes therethrough. . Then, as shown in FIG. 3, the change key 20 of the present invention is inserted into the key groove 5c of the cylinder lock 1. The cylinder lock 1 is the same as that described in the conventional example, and the description of the locking mechanism and the unlocking mechanism has already been described in the conventional example and is omitted because it overlaps. By inserting the change key 20, the tumbler 7 is aligned according to the height and direction of the key 21 at the key crest so that the leg portions 8c, 8d of the locking side bar 8 can enter the side bar hole 7d of the collar 7a. Thus, the inner cylinder 5 can be rotated in the unlocking direction, and the change collar 10 is pushed by the protrusion 22 to move in the arrow direction (rearward direction) to reach the key change position as shown in FIG. . The change key 20 is moved from the locked position to
For example, it is rotated approximately 90 degrees in the clockwise direction to the unlock position. Then, as shown in FIG. 4, the spire portion 9 b of the key change side bar 9 is changed to the change collar 10.
The sphere 12 that has been restricted by the leg portions 9c and 9d can be moved downward by being dropped into the concave portion 10b by the urging force of the spring 14 and moved downward, so that the tumbler 7 and the collar 7a The engagement relationship is released. As a result, the tumbler 7 can be moved in the left-right direction relative to the collar 7 a that cannot be moved in the left-right direction by the side bar 8. Therefore, the change key 20 can be pulled out from the keyway 5c at this unlocking position. For the sake of convenience, the change key 20 in FIG. After the change key 20 is pulled out from the keyway 5c at the unlocking position, a desired new key is inserted into the keyway 5c.
By inserting it into c and rotating it approximately 90 degrees counterclockwise to return it to the locked position, the cylinder lock 1 is made into a new key organization. Thus, the change key 20 is pulled out from the keyway 5c at two positions, ie, the locked position and the unlocked position. Further, the projection 22 is not limited to the shape of this embodiment, and it is sufficient that the change collar 10 can be pushed backward to be moved to the key change position, as shown in FIG. Further, regardless of whether it is integral with the key 21 or separately, it has a shape like a convex protrusion 23 inserted into the pressing passage groove 5d, or a protrusion 24 punched and bent part of the key 21. May be. As shown in FIGS. 6 to 7, the standard key 25 of the present invention has a change key in a part of the key 21 (for example, the back surface) inserted into the key groove 5c of the cylinder lock 1 in the key groove 5c. A lid member 26 is provided as a closing means for closing the pushing passage groove 5d through which the projection 22 as the pushing means 20 passes . The lid member 26 has the projection 24 (FIG. 5).
Note that (see (b)) is opposite in the axial direction. Further, the lid member 26 is not limited to this embodiment, and it is sufficient that the lid passing groove 5d is closed and the change collar 10 is not moved to the key change position. A protrusion may be used. When the standard key 25 is inserted into the key groove 5c as shown in FIG. 8, the tumbler 7 is aligned according to the height and direction of the key 21 at the key crest, and the legs 8c, 8d of the locking side bar 8 are aligned. There so Hairikomeru the sidebar hole 7d of the collar 7a, becomes rotatable in the inner cylinder 5 unlocking direction, through a push is closed member 26
Although entering the excessive groove 5d, as shown in FIG. 9, it does not contact the change collar 10 and the change collar 10 is not moved backward. Therefore, change color 10
Does not reach the key change position. Further, the closing member 26
Is present in the pushing passage groove 5d, it is not possible to perform an illegal act of moving the change collar 10 to the key change position by using a rod-like body or the like from the outside. Then, the standard key 25 is rotated from the locked position to, for example, approximately 90 degrees clockwise to the unlocked position. Then, as shown in FIG.
Since the change collar 10 does not exist at the key change position, the spire portion 9b of the key change side bar 9 is not dropped into the recess 10b of the change collar 10. The standard key 25 in FIG.
Is shown in the reverse direction for convenience. Accordingly, since the leg portions 9c and 9d restrict the movement of the spherical body 12, the engagement relationship between the tumbler 7 and the collar 7a is maintained, and the side bar 8 cannot move in the left-right direction and around the axis. The tumbler 7 that is engaged by the collar 7a cannot relatively move in the left-right direction and around the axis. Therefore, even if the standard key 25 is pulled out from the keyway 5c in the unlocked position, the tumbler 7 cannot be moved, so that it cannot be pulled out. Thus, although the standard key 25 can lock and unlock the cylinder lock 1, it can be pulled out from the key groove 5c at the locked position but cannot be pulled out from the key groove 5c at the unlocked position. In addition, the pushing passage groove 5d is closed to prevent unauthorized key change operation. As described above, the standard key according to the present invention is fitted to the tumbler and a part of the key inserted into the key groove of the cylinder lock.
Check that the engagement with the collar can be released in the unlocked state.
Push the color into the key change position and enter a new key
Pushing means provided on the change key for knitting
Push-in passage provided in the keyway so that the
Since a closing means for closing the groove is provided ,
This has an excellent effect of preventing an illegal act of a key change operation. [0032]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a side view of a change key. FIG. 2 is a front view of the cylinder lock 1; 3 is an explanatory diagram showing a use state of the switch Enjiki. 4 is an explanatory view showing a state became unlocked state using the same switch Enjiki. FIGS. 5A and 5B are side views (a) and (b) showing another embodiment of the change key. FIG. 6 is a perspective view of a standard key of the present invention. FIG. 7 is a cross-sectional view of the standard key of the present invention. FIG. 8 is an explanatory diagram illustrating a usage state of the standard key of the present invention. FIG. 9 is an explanatory view showing a state where the unlocked state is obtained using the standard key of the present invention. FIG. 10 is a cross-sectional view showing a schematic structure of a cylinder lock according to a conventional example. 11 is a cross-sectional view taken along line AA in FIG. 10, showing a schematic structure of the cylinder lock according to the conventional example. FIG. 12 is a perspective view of a change collar of the cylinder lock according to the conventional example. FIG. 13 is a longitudinal sectional view showing a key change preparation state in which a change key is pushed backward using a key adapter into the cylinder lock according to the conventional example. FIG. 14 is a cross-sectional view (A) of the cylinder lock according to the conventional example in a state where the inner cylinder is rotated together with the key adapter to be in an unlocked state and a key knitting enabled state, and a new key is inserted; It is sectional drawing (b) along the -C line. [Explanation of symbols] 1 Cylinder lock, 2 outer cylinder, 2a groove, 2b groove, 2
c Circumferential groove, 5 Inner tube, 5a Spring hole, 5c Key groove, 5
d Passing groove for pushing, 6 Spring, 6a Stop plate,
7 Tumbler, 7a Collar, 7b Tip, 7c
Collar, 7d side bar hole, 7f recess, 7e fixing member hole, 8 locking side bar, 8a bar body, 8b spire, 8c, 8d leg, 8e spring hole, 8f notch , 9 Sidebar for key change,
9a Bar body, 9b Steeple, 9c, 9d Leg, 9
e Spring hole, 10 change collar, 10a body part, 10b recess, 10c guide part, 10d spring hole, 11 spring, 12 sphere, 13 spring, 14 spring, 15 key adapter, 15b
Projection, 16 Standard Key, 20 Change Key, 21 Key, 22, 23, 24 Projection, 25 Standard Key, 26 Cover Member.

──────────────────────────────────────────────────── ─── Continued from front page (58) Fields surveyed (Int.Cl. ⁷ , DB name) E05B 27/00-29/14 E05B 19/02

Claims (1)

(57) [Claims] [Claim 1] Engagement of a tumbler and a collar fitted to the tumbler on a part of a key inserted into a keyway of a cylinder lock
The change collar that enables the release in the unlocked state
-To push into the change position and create a new key
So that the push-in means provided on the change key of the
To close the push-in passage groove provided in the key groove
Because of Standard keys, characterized in that, the closing means is provided.