JPH11324426A - Cylinder lock for opening/closing door - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cylinder lock which can sufficiently protect a rotor against a bar-form tool and can be unlocked by immediately inserting a key into the key hole of the rotor without troublesome manipulation to remove a hard cap or open it. SOLUTION: This cylinder lock is constituted of a cylinder lock body 5 and a hard cap 7 fixedly fitted outwardly to the external cylindrical head 12 of the cylinder lock body 5 to rotate a rotor 11 in accordance with manipulation of the key. A small diameter notch for penetration of the key, positioned opposite to the key hole 20 of the rotor 11 of the cylinder lock body 5 is formed in the hard cap 7, and the surface wall 25 having such a hardness that the rotor 11 is not damaged by a bar-form tool is formed in the hard cap.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cylinder-lock of a lock device mounted on an opening / closing door of a vending machine, a locker or the like.

[0002]

2. Description of the Related Art A cylinder lock which is attached directly to an opening / closing door of a vending machine, a locker or the like or via a lock handle constituting a lock device may be intentionally broken by a thief. Therefore, there is a demand for a device for protecting a keyhole of a rotor rotatably provided in an outer cylinder of a cylinder lock.

[0003] By the way, the keyhole of the rotor is broken by a rod-shaped tool (drus bar, drill, etc.). Therefore, countermeasures for the bar-shaped tool must be considered.
Therefore, it is conceivable to attach a protective cover which can be opened and closed or detachable so as not to expose the keyhole of the rotor at the tip of the outer cylinder of the cylinder-lock. However, the invention based on such a concept has a drawback that the protective cover itself has a complicated structure, and that the operation key (key) cannot be inserted unless a complicated operation such as opening / closing or attachment / detachment is performed. Further, when the protective cover itself is broken by the rod-shaped tool, there remains a problem that the keyhole of the rotor cannot be sufficiently protected.

[0004] Therefore, at present, from the viewpoints of simplicity of the structure, easiness of mounting, operability, protection of the rotor, and the like, there is a demand for the appearance of a cylinder-lock having a more excellent structure.

[0005]

SUMMARY OF THE INVENTION In view of the above-mentioned demands, the present invention is structurally simple, can improve operability, and sufficiently exerts a rotor protection function. An object of the present invention is to provide a cylinder lock for an opening / closing door that can be operated.

[0006]

A cylinder lock for an opening and closing door according to the present invention is externally fitted to a cylinder lock main body 5 and an outer cylinder head 12 of the cylinder lock main body 5 in a locked state, and has an operation key. And a hard cap 7 that rotates together with the rotor 11 in response to the operation 8. The hard cap 7 is formed with a small-diameter cut-out portion 31 for operating key penetration facing the keyhole 20 of the rotor 11 of the cylinder lock body 5. In addition, the surface wall portion 25 has a hardness such that the rotor 11 is not damaged by the rod-shaped tool.
It is characterized by having.

In the above configuration, the hard cap 7 is characterized in that it has a carburized and quenched bulging surface wall portion 25. Also, on the inner wall surface of the fitting recess 27 of the hard cap 7 in the vertical direction, the small-diameter cut-out portion 31 for penetrating the operation key of the hard cap 7 and the keyhole 20 of the rotor 11 of the cylinder lock body 5 always face each other. It is characterized in that an engaged portion 29 that engages with the engaging portion 22 formed on the front surface of the rotor 11 is formed. Further, a circumferential groove 16 is formed in the short cylindrical fitting portion 15 of the outer cylinder head 12 of the cylinder lock body 5, while the fitting recess of the hard cap 7 which is fitted externally with the short cylindrical fitting portion 15. The inner circumferential wall of the peripheral groove 17
The hard cap 7 is engaged with both the circumferential groove 16 and the receiving groove 28 via the elastic locking ring 6 so that the hard cap 7 engages with the short cylindrical fitting portion 1 of the cylinder lock body 5.
5 and is integrally locked.

The cylinder lock for an opening / closing door according to the present invention has a cylinder lock body 5A fixed to the opening / closing door 1A so that an outer cylinder head 12A protrudes, and externally fitted to the outer cylinder head 12A in a locked state. And a hard cap 7A that rotates together with the rotor 11 in response to the operation of the operation key 8,
The hard cap 7A is formed with a small-diameter notch 31 for penetrating the operation key facing the keyhole 20 of the rotor 11 of the cylinder lock body 5A, and is formed by a rod-shaped tool.
Of the hard cap 7A and the outer cylinder head 12A.
Is characterized in that the cylindrical idler 35 is fitted in a locked state. In this case, the cylindrical idler 35 is also the bulged surface wall portion 2.
It has an outer wall surface portion 35a that is carburized and quenched similarly to 5A.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to an embodiment shown in the drawings. 1 to 11 show a first embodiment of the present invention. In the first embodiment, 1
Is an opening / closing door of a vending machine, and a lock device X is fixedly attached to the opening / closing door 1. As shown in FIGS. 1 and 2, a lock device X mounted on a vending machine is a lock housing fixedly attached to the door 1 so as to be substantially flush with the surface 1a of the door 1. A lock handle 3 which is stored in the lock housing 2 so that the surface of the handle portion is the same as the surface of the lock housing, and which pops out of the lock housing 2 by a required amount when unlocked by a key operation; The lock 3 comprises a combination of a cylinder and a lock 4 stored so that the surface of the lock is substantially the same as the surface of the lock.

The present invention relates to a structure relating to the cylinder-lock 4, and is suitable for use through a lock 3 having a fitting hole 3a as shown in FIGS. 3 and 4, for example. Therefore, the configuration of the cylinder lock 4 will be described in detail below.

The cylinder lock 4 of the present invention is externally fitted to a cylinder lock main body 5 via an elastic locking ring 6 on the head of the cylinder lock main body 5 as shown in FIG. And a hard cap 7 that rotates in response to the operation.

Therefore, the cylinder lock main body 5 will be described first with reference to FIG. 5 or FIG. Cylinder lock body 5
In the present embodiment, an outer cylinder 10 and a rotor 11 rotatably provided on the outer cylinder 10 are provided.

As shown in FIG. 7, the outer cylinder body 10 includes an outer cylinder head 12 at the front end and an outer cylinder neck 13 at the rear end connected to the outer cylinder head 12. Is distinguished. A flange 14 is provided around the tip of the outer cylinder head 12, and the tip of the outer cylinder head 12 with respect to the flange 14 is used as a short cylindrical fitting portion 15 for the hard cap 7. It has become. A peripheral groove 16 is formed in the short cylindrical fitting portion 15. Although an annular groove 17 is formed in the outer cylinder neck portion 13 in the circumferential direction, the annular groove 17 is provided in relation to a locking piece (not shown) and is not a main part of the present invention. .

On the other hand, the rotor 11 has a keyhole 20 at the center from the tip end side toward the axial direction, like a general rotor, and extends rearward from the outer cylinder neck 13 of the outer cylinder body 10. A rotation rod (not shown) is fitted to the drive shaft 21 protruding from the drive shaft 21. Thus, a plurality of projecting engagement portions 22 slightly protruding from the front surface 15a of the short cylindrical fitting portion 15 of the outer cylindrical body 10 are provided at the tip end of the rotor 11. In the present embodiment, these projecting engagement portions 22 are provided symmetrically on the left and right of the keyhole 20, as shown in FIG. 5, and have a semi-circular shape, for example.

Next, the hard cap 7 will be described with reference to FIGS. Here, the “hard cap” refers to a cap-shaped member that has been hardened by heat treatment so as not to be easily deformed by a commonly used rod-shaped tool (for example, a driver). In this embodiment, the hard cap 7 is carburized and quenched. Although the carburizing depth of the hard cap 7 is not particularly limited, at least the hard cap 7 preferably has a carburized and quenched surface wall from the viewpoint of theft prevention.

The surface wall portion 25 of the hard cap 7 which is carburized and quenched is formed in a swollen shape in this embodiment. Therefore, the thief uses a screwdriver to remove the surface wall 2
Even if you hit 5, it slips because of its hardness. Further, in the present embodiment, a part of the peripheral wall portion 26 of the hard cap 7 is similarly carburized and quenched. Therefore, the hard cap 7
Means that the outer wall surface is entirely carburized and quenched.

Incidentally, the hard cap 7 of this embodiment is
Constitutes a part of the cylinder lock 4 as described above. Therefore, the hard cap 7 will be described in more detail. As shown in FIG. 6, reference numeral 27 denotes a circular fitting recess formed on the back side of the hard cap 7, and an annular receiving groove 28 is formed on the inner peripheral wall of the fitting recess 27.
The annular receiving groove 28 is opposed to the peripheral groove 16 of the short cylindrical fitting portion 15 of the outer cylindrical body 10 as shown in FIG. 8, and the receiving groove 28 and the peripheral groove 16 have elastic locking rings. (In the present embodiment, a C-shaped or U-shaped ring) 6 is fitted. Therefore, the hard cap 7 is integrally engaged via the elastic locking ring 6. And hard cap 7
Is not easily detached from the cylinder lock main body 5 via the locking ring 6 and is rotatable together with the rotor 11 with respect to the outer cylinder 10.

Reference numeral 29 denotes a plurality of recessed engaged portions formed on the inner wall surface of the fitting recess 27 in the vertical direction, and these recessed engaged portions 29 correspond to the rotor 11 described above. Are respectively engaged with the protruding engagement portions 22. Therefore, the shape of the recessed engaged portion 29 is also a semicircular arc corresponding to that of the projecting engagement portion 22.

Reference numeral 30 denotes a large-diameter cutout into which a part of the knob 8a of the operation key 8 enters as shown in FIG. And toward the fitting recess 27 on the back side. Reference numeral 31 denotes the large-diameter cutout 30 and the fitting recess 2.
7, and in this embodiment, the keyhole 20 of the rotor 11.
This is a small-diameter cutout for operating key penetration always facing the.

In the above configuration, the lock handle 3 of the lock device X
Before assembling the cylinder lock 4 into the cylinder lock, the hard cap 7 is externally fitted to the short cylindrical fitting portion 15 of the cylinder lock main body 5 in advance. When fitting the hard cap 7 into the short cylindrical fitting portion 15, the C-shaped or U-shaped elastic locking ring 6 is inserted into the receiving groove 28 of the hard cap 7 and the circumferential groove 16 of the short cylindrical fitting portion 15, respectively. Make it elastically engaged. Since the locking ring 6 is an elastic body, when the hard cap 7 is fitted, it is once deformed to the circumferential groove 16 side and then returned to the receiving groove 28 side, and the hard cap 7 is attached to the cylinder lock body 5 as shown in FIG. Lock. As described above, when the hard cap 7 is elastically locked integrally with the cylinder lock main body 5 via the locking ring 6, the projections of the cylinder lock main body 5 on the fixed side are engaged with the recessed engaged portions 29, 29. The engagement portions 22, 22 just fit, so that the hard cap 7 itself does not rotate alone.
Accordingly, the small-diameter cut-out portion 31 for penetrating the operation key of the hard cap 7 is
Is always facing.

Thus, the cylinder lock 4 of the present invention is fitted into the fitting hole 3a of the lock 3 as shown in FIG. In this case, the bulged surface wall portion 25 of the hard cap 7 of the cylinder lock 4 slightly protrudes from the surface of the lock 3 or the fitting hole 3a. Since the bulged surface wall portion 25 of the hard cap 7 is carburized and quenched in this embodiment, a burglar can now temporarily remove the hard cap 7 from the cylinder lock body 5 using a bar-shaped tool such as a screwdriver or a drill. Even if the hard cap 7 is broken or the large diameter cutout 30 of the hard cap 7 is opened, the hard cap 7 is not easily broken or deformed. Further, even if the hard cap 7 is to be removed, the peripheral wall 26 of the hard cap 7 substantially enters into the fitting hole 3a of the lock 3, and the carburized and quenched surface wall 25 becomes a cone or dome. Since the tip of the bar-shaped tool slides, the hard cap 7 functions as a member for protecting the rotor 11 against a thief, and unlocks the rotor 11 in addition to the regular operation key 8. Can not turn in the direction.
Then, as shown in FIG. 8, when the regular operation key 8 is inserted into the large-diameter cutout portion 30 of the hard cap 7 or the key hole 20 of the rotor 11 and turned in the unlocking direction, the hard cap 7 rotates together with the rotor 11.

[0022]

First, in the first embodiment, the positional relationship between the engaging portion 22 and the engaged portion 29 may be reversed. A circumferential groove 16 is formed in the short cylindrical fitting portion 15 of the outer cylinder head 12 of the cylinder lock body 5, while a fitting recess 27 of the hard cap 7 which is fitted externally with the short cylindrical fitting portion 15. An annular receiving groove 28 facing the peripheral groove 16 is formed on the inner peripheral wall of the cylinder lock main body 5 via the elastic locking ring 6 for engaging the hard cap 7 with both the peripheral groove 16 and the receiving groove 28. The elastic locking ring 6 is not necessarily a specific requirement of the present invention.

That is, when the hard cap 7 is externally fitted to the cylinder lock main body 5, the peripheral groove 16 formed in the short cylindrical fitting portion 15 of the cylinder lock main body 5 has a peripheral edge on the back side of the hard cap 7. This is because the hard cap 7 can be swaged and locked to the short cylindrical fitting portion 15 so as to be rotatable.

Therefore, it is sufficient that the hard cap 7 is externally fitted to the outer cylinder head 12 of the cylinder lock main body 5 in a locked state and rotated in response to the operation of the operation key 8.

Next, a second embodiment of the present invention will be described with reference to FIGS. In the description of the second embodiment, the same components as those of the first embodiment are denoted by the same or similar reference numerals, and duplicate description will be omitted.

In the second embodiment, as shown in FIG. 12, for example, a cylinder lock 4A is fixedly attached to an opening / closing door 1A of a vending machine, and an outer cylinder of a cylinder lock main body 5A constituting the cylinder lock 4A. The head 12A is the door 1A
2 shows an embodiment protruding from the surface 1a of FIG.

Also in this embodiment, the hard cap 7A is provided with the short cylindrical fitting portion 15 of the outer cylinder head 12A.
A is the same as the first embodiment in that it is externally fitted to A in a locked (possible) state via an elastic locking ring 6A.

However, in the second embodiment, the cylindrical idler 35 having the trapezoidal outer wall portion 35a and the annular locking portion 36 formed at the inner end of the inner peripheral wall is the hard cap 7A. Is different from the first embodiment in that the outer wall 26A and the outer cylinder head 12A protruding from the cylinder lock main body 5A are externally fitted. The outer wall surface portion 35 of the cylindrical idler 35
a is also carburized and quenched similarly to the bulging surface wall portion 25A. Even with this configuration, the same object as the specific invention can be achieved.

[0029]

As is clear from the above description, the present invention has the following effects. (1) It is structurally simple. Therefore, it can be manufactured at low cost. (2) Operability is good. For example, immediately insert the operation key into the keyhole of the rotor without performing troublesome operations such as removing or opening the hard cap, and
Can be unlocked. (3) Since it is extremely difficult to break the hard cap with a rod-shaped tool, the rotor can be sufficiently protected. (4) Others It is easy to attach the hard cap to the cylinder lock body.

[Brief description of the drawings]

1 to 11 show a first embodiment of the present invention. FIG.
14 to 14 show a second embodiment of the present invention.

FIGS. 1 and 2 are explanatory views showing an embodiment of the invention using the first embodiment.

FIGS. 2 and 3 are explanatory diagrams showing a relationship with a lock handle in FIGS. 1 and 2. FIG.

FIG. 5 is an exploded perspective view of the present invention.

FIG. 6 is a perspective view of the main part (hard cap) as viewed from the back side.

FIG. 7 is a schematic sectional explanatory view of a main part and the like in a disassembled state.

FIG. 8 is an explanatory diagram in a state where operation keys are inserted.

FIG. 9 is a front view of a main part (hard cap).

FIG. 10 is a sectional view taken along line 10-10 of FIG.

FIG. 11 is a rear view of a main part (hard cap).

FIG. 12 is an explanatory view showing an embodiment of the invention using the second embodiment.

FIG. 13 is a schematic explanatory view of a state where a main part (hard cap) is separated.

FIG. 14 is a schematic explanatory view of a state where main parts (hard caps) are connected.

[Explanation of symbols]

X: locking device, 1, 1A: opening / closing door, 2: locking housing, 3: lock handle, 4, 4A: cylinder lock, 5, 5A: cylinder lock body, 6, 6A: locking ring, 7, 7A ... Hard cap, 8 operation keys, 10 outer cylinder, 11 rotor, 1
2, 12A: outer cylinder head, 13: outer cylinder neck, 15, 15A
... fitting part, 20 ... keyhole, 22 ... engaging part, 25, 25A
... Surface wall part, 26, 26A ... Peripheral wall part, 27 ... Fitting recess, 28 ... Annular receiving groove, 29 ... Engaged part, 30 ... Large diameter cutout part, 31 ... Small diameter cutout part, 35 ... Tube Idling body.

Claims (6)

[Claims] 1. A cylinder lock body 5 and an outer cylinder head 12 of the cylinder lock body 5 are externally fitted in a locked state, and
A hard cap 7 that rotates together with the rotor 11 in response to operation of the operation key 8.
Is formed with a small-diameter notch 31 for penetrating the operation key facing the keyhole 20 of the rotor 11 of the cylinder lock body 5, and
A cylinder lock for an opening / closing door, comprising a surface wall portion (25) having a hardness such that the rotor (11) is not damaged by a rod-shaped tool. 2. The cylinder lock for an opening / closing door according to claim 1, wherein the hard cap 7 has a bulging surface wall portion 25 which is carburized and quenched. 3. The small-sized notch 31 for penetrating the operation key of the hard cap 7 and the rotor 11 of the cylinder lock main body 5 are provided on the inner wall surface of the fitting recess 27 of the hard cap 7 in the vertical direction. An engaging portion 29 that engages with an engaging portion 22 formed on the front surface of the rotor 11 is formed so that the keyhole 20 always faces the lock hole. 4. The cylinder lock body 5 according to claim 1,
A circumferential groove 16 is formed in the short cylindrical fitting portion 15 of the outer cylindrical head 12, while an inner circumferential wall of a fitting recess 17 of the hard cap 7 which is fitted externally with the short cylindrical fitting portion 15. An annular receiving groove 28 facing the circumferential groove 16 is formed.
Is engaged with both the circumferential groove 16 and the receiving groove 28 via the elastic locking ring 6 to form the short cylindrical fitting portion 15 of the cylinder lock body 5.
Cylinder lock for opening and closing doors, which is integrally locked to the door. 5. A cylinder lock main body 5A fixed to the opening / closing door 1A so that the outer cylinder head 12A protrudes, and is externally fitted to the outer cylinder head 12A in a locked state. A hard cap 7A that rotates together with the rotor 11 in response to an operation, wherein the hard cap 7A is formed with a small-diameter cut-out portion 31 for operating key penetration facing the keyhole 20 of the rotor 11 of the cylinder lock body 5A; The rotor 11 has a surface wall 25A having a hardness that does not damage the rotor 11 by the rod-shaped tool, and a cylindrical idler 35 is fitted in a locked state to the peripheral wall 26A of the hard cap 7A and the outer cylinder head 12A. Cylinder lock for opening and closing doors, characterized in that: 6. The cylindrical idler 35 according to claim 5,
An opening / closing door cylinder lock having an outer wall portion 35a carburized and quenched similarly to the bulging surface wall portion 25A.