JP2003049565A - Handle lock - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a handle lock capable of promoting burglar-proof efficiency by completely preventing an unjust unlocking operation, above all, an attack operation to a hard cap. SOLUTION: The handle lock is constituted of a handle case 2 stored in a housing 1 in a drawable manner, a cylinder lock 4 coating the front with the hard cap 3, stored in the handle case 2 and controlling a drawable operation of the handle case 2 and a protection ring 5 formed of a hard material having difficulty in making perforation operation by at least a drill and having no uneven step on the circumference for surrounding the circumferential edge of the hard cap 3 up to the back rather than the rear end, and the protection ring 5 is so constituted that the diameter of a conical surface 6 gradually reduced as it goes backward is formed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a handle lock.

[0002]

2. Description of the Related Art As a handle lock in which an unauthorized operation of the handle is prohibited by immersing the handle in a housing in a locked state, for example, one disclosed in Japanese Patent Laid-Open No. 11-81754 is known. ing. In this conventional example, a handle case in which a handle portion is formed accommodates a cylinder lock whose tip is hardened by a hard cap, and the handle case is pulled out to the front side by rotating the rotor of the cylinder lock. be able to.

In this type of handle lock in which the handle case is pulled out by operating the rotor, for example, a hole is drilled in the peripheral edge of the cylinder lock with a drill or the like, and then the tip of a driver or the like is inserted through the hole to make it hard. After removing the cap, the unauthorized unlocking operation of forcibly pulling out the rotor from the handle case and pulling out the handle case is a problem, and in order to disable such unauthorized unlocking operation,
A flanged ring made of a strong metal is fixed to the periphery of the rotor.

[0004]

However, even in the above-mentioned conventional case, it is possible to form a drill hole further outside the collar portion of the collared ring, and the handle case is manufactured in consideration of manufacturing efficiency, price, etc. Since it is made of a relatively soft material such as zinc die-casting, it does not exert an effective drag force on the driving operation of a driver or the like.For example, from a drill hole drilled further outside the collar part It may be destroyed by hitting.

As a result, there is a drawback that the attack operation on the hard cap cannot be completely prevented, and the countermeasure against the illegal unlocking operation cannot be said to be perfect.

The present invention has been made in order to solve the above-mentioned drawbacks, and it is an object of the present invention to provide a handle lock with improved anti-theft performance by making it difficult to perform an illegal unlocking operation, especially an attacking operation on a hard cap. For the purpose of provision.

[0007]

SUMMARY OF THE INVENTION According to the present invention, the above object is to accommodate a handle case 2 housed in a housing 1 so as to be able to be drawn out, and housed in the handle case 2 with its front surface capped by a hard cap 3. A cylinder lock 4 for restricting the pulling-out operation of the handle case 2, and a protective ring formed of at least a hard material that is difficult to drill with a drill and surrounding the periphery of the hard cap 3 to the rear of the rear end and having no step 5 and the protection ring 5
Is achieved by providing a handle lock in which a conical surface 6 is formed which gradually contracts toward the rear.

The handle lock is formed by housing the handle case 2 in the housing 1 in a retracted state, and can be pulled out from the housing 1 by operating the rotor 4a of the cylinder lock 4 housed in the handle case 2. In the pulled-out state, the handle case 2 serves as a handle for the door operator, and the door can be opened.

The front end of the cylinder lock 4 is covered with a hard cap 3 made of a hard material to prevent the rotor 4a from being pulled out from the cylinder case 4b. Further, the protection ring 5 has a hardness at least such that drilling with a drill cannot be easily performed, and by surrounding the peripheral edge of the hard cap 3, as shown in FIG. A drill hole 9 is drilled in the peripheral edge of the hard cap 3 to make it impossible to directly pull out the hard cap 3.

Further, the hard cap 3 is formed by the above means.
It is indispensable for the hard cap 3 side to have a margin for catching a driver or the like in order to remove the protective ring 5 illegally. However, since the protective ring 5 has a stepless outer circumference,
It is not possible to pull out the protective ring 5 and the hard cap 3 by hooking a driver or the like on the intermediate portion. Further, since the rear end of the protection ring 5 extends further rearward than the rear end of the hard cap 3, the rear end of the hard cap 3 is generally used as a hook for a driver or the like for prying and removing the hard cap 3, or The portion of the cylinder case 4b where the hard cap 3 is attached is also covered with the protective ring 5, and the hard cap 3 cannot be directly given a prying force. In addition, since the conical surface 6 is formed at the rear end of the protection ring 5, the step difference to be formed at the lower end of the protection ring 5 becomes gradually smaller, and accordingly, the catching margin becomes smaller to the extent that it is not harmful. Therefore, it is not possible to apply a force in the pulling direction to the protection ring 5 from the rear end of the protection ring 5.

Therefore, in the present invention, not only the pulling force directly to the hard cap 3 but also the protective ring 5 is used.
Since it is also impossible to apply a pulling force to the lock, the resistance to an illegal unlocking operation is improved.

The outer periphery of the protective ring 5 is sufficient if there is no step to the extent of being a hooking margin by a driver or the like, and it does not prohibit the existence of mere unevenness that cannot substantially become a hooking margin.

Further, when the protective ring 5 is formed with a thin portion 7 corresponding to the position near the rear end of the hard cap 3 over the entire circumference, when the protective ring 5 is subjected to an excessive load, the thin portion 7 is applied to the protective ring 5. The stress concentrates, and as shown in FIG. 3B, the protective ring 5 breaks from the thin portion 7 and is separated into upper and lower parts.

In the separated state, the rear residual portion 10 covers the rear end of the hard cap 3 and the load load on the rear end of the hard cap 3 is prohibited, and the rear residual portion 1 is further prevented.
In the case of 0, since the rear end is the conical surface 6, there is no margin for being caught in the residual portion 10 by the driver 11 or the like, so that the unlocking by the pulling operation of the hard cap 3 by the above method is prevented.

Normally, the locking operation of the tip of the driver 11 to the catching margin is considered to be performed by striking the driver 11 by giving a hammering force to the driver 11 by using a hammer or the like. By forming the brittle material, the protective ring 5 can be broken and separated as described above in a state where the protective ring 5 is given a hammering force, thereby preventing an illegal unlocking operation. As the brittle material having the required hardness, for example, hardened steel can be used.

The handle lock is housed in the housing 1 so that it can be pulled out, and the front face is capped by the hard cap 3 and housed in the handle case 2, and the pulling operation of the handle case 2 is restricted. A hard ring body 8 having a rear end and an outer diameter at least equal to or smaller than that of the hard cap 3 can be arranged near the rear end of the hard cap 3.

The hard ring body 8 includes the lower residual portion 1 described above.
Similar to 0, the catching margin due to the load applied to the rear end of the hard cap 3 is eliminated, and the handle lock is protected from an illegal unlocking operation.

Since the hard ring body 8 reduces the catching margin of the driver 11 etc. to such an extent that it is not harmful, it is sufficient if at least the rear end has a smaller diameter than the hard cap 3, for example, the hard cap from the front end to the rear end. 3 is a cylindrical shape having an outer diameter smaller than 3, or a frustoconical cylindrical shape having a larger diameter than the hard cap 3 at the front end and gradually contracting toward the rear end, and further, a conical surface only at the rear end. 6 or a rounded surface can be formed.

In addition to the front end of the hard ring body 8 directly contacting the rear end of the hard cap 3, the front end of the hard ring body 8 is substantially connected to the rear end of the hard cap 3 by the tip of the driver 11 or the like. There may be a gap where the edges cannot be hooked.

[0020]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows a handle lock fixedly used on a door of an automatic vending machine. In this embodiment, the handle lock is a sleeve 12 housed in the housing 1 and a handle case 2 that is inserted into the sleeve 12, is relatively movable in the front-rear direction with respect to the sleeve 12, and is coupled in the rotation direction. Equipped with. The handle case 2 is made of, for example, a zinc die-cast alloy, has a handle portion 2a that can be fitted in a handle accommodating recess 1a formed on the surface of the housing 1, and has a handle as shown by a solid line in FIG. When the portion 2a is accommodated in the handle accommodating portion 1a, the surfaces of the handle portion 2a and the housing 1 are substantially flush with each other, and the operation of the handle portion 2a is prohibited.
As shown by the chain line in (b), the handle portion 2a can be operated only in the pulled-out state.

The handle case 2 is provided with a cylinder mounting hole 2b, and the cylinder lock 4 is inserted in the cylinder mounting hole 2b.
Is installed. The cylinder lock 4 is a cylinder case 4b.
And a rotor 4a capable of performing relative rotation operation with respect to the cylinder case 4b only by a key plate having a genuine unlocking code. The rotor 4a has a cam surface 4c for fitting the stopper 13 into the housing 1 in the locked state, and by rotating the rotor 4a in the unlocking direction, the cam surface 4c moves the stopper 13 in the fitting releasing direction with respect to the housing 1. Then, the handle case 2 can be pulled out. When the handle portion 2a is rotated with the handle case 2 pulled out, the sleeve 12
Is rotated together with the handle case 2, and the locking portion (not shown) connected to the end portion 12a of the sleeve 12 moves in the disengagement direction with the casing of the vending machine to open the door.

As shown in FIG. 2, the cylinder lock 4 has a large-diameter portion 4d at its tip (front end), and the surface of the hard cap 3 covered with the large-diameter portion 4d extends from the cylinder mounting hole 2b of the handle case 2. It is arranged to be exposed. Hard cap 3
Is formed of a material having a hardness sufficiently high that machining with a drill or the like cannot be easily performed, and tampering with the rotor 4a is prevented.

Further, the nut 1 is attached to the cylinder case 4b.
4 is screwed, the stopper body 15 having two stopper legs 15a, 15a is fixed to the handle case 2, and the movement path of the cylinder lock 4 in the pull-out direction (front) is closed by the stopper leg 15a. Will be stopped.
In order to prevent an illegal pulling operation of the cylinder lock 4 from the handle case 2, the stopper body 15 is made of a hard material that cannot be easily cut and broken by a drill or the like.

A protective ring 5 made of hardened steel is provided around the hard cap 3 of the cylinder lock 4.
Is fixed. The protection ring 5 is the cylinder case 4 described above.
It is a cylindrical member extending from the surface of b to the front surface of the stopper leg 15a, and has a conical surface 6 which is gradually contracted toward the rear at the rear end. Further, a locking portion 5a is provided on the inner circumference of the protection ring 5, and the locking portion 5a is locked to a jaw portion 4e formed at the base end of the large diameter portion 4d of the cylinder lock 4 to prevent it from coming off. To be done. Further, the protection ring 5 has a thin portion 7 on the same plane as the plane formed by the jaw 4e.
Is formed.

Therefore, in this embodiment, as shown in FIG.
As shown in (a), a drill hole 9 is formed on the periphery of the protection ring 5.
Open, and insert a driver 11 or the like into the drill hole 9, and try to pull out by pulling the rear edge of the hard cap 3,
The rear end of the hard cap 3 or the cylinder case 4b
Since the jaw 4e of the is covered by the protection ring 5,
It is not possible to perform a prying operation on the hard cap 3. Further, since the rear end portion of the protection ring 5 has the conical surface 6, it is difficult to apply a force in the pulling direction to the protection ring 5 itself.

Further, when the driver 11 or the like attacks the protective ring 5 by an impact force, the protective ring 5 is broken from the thin portion 7 and separated into front and rear as shown in FIG. 3 (b). To do. In the separated state, the front separating portion 16 is
Although it can be pulled out from the handle case 2, the rear separating portion (rear remaining portion 10) cannot be taken out and remains because the locking portion 5a is locked to the cylinder lock 4. Since the front end of the rear residual portion 10 has a larger diameter than the jaw 4e, the rear jaw 10 cannot be attacked by the jaw 4e.

FIG. 4 shows another embodiment of the present invention. In the description of this embodiment, components that are substantially the same as those in the above-described embodiment are designated by the same reference numerals in the drawings, and description thereof will be omitted.

In this embodiment, the hard ring body 8 is mounted so that the front end of the cylinder lock 4 contacts the jaw 4e. The outer diameter of the hard ring body 8 is the cylinder case 4b.
Is a ring-shaped member having substantially the same outer diameter as the large diameter portion 4d of
The height dimension is approximately equal to the distance from the rear end of the jaw 4e to the front surface of the stopper leg 15a. Further, at the rear end of the hard ring body 8, the conical surface 6 is formed similarly to the protection ring 5 described above.

Therefore, in this embodiment, even if the hard cap 3 is to be removed by the above-mentioned operation,
Since there is no catching margin on the jaw 4e or the rear end of the hard cap 3, it is impossible to attack the hard cap 3.

[Brief description of drawings]

FIG. 1 is a view showing the present invention, in which (a) is a front view and (b) is a sectional view taken along line 1B-1B of (a).

FIG. 2 is a view showing a handle case, (a) of FIG.
2A-2A sectional view of (a), (b) is 2 of FIG. 2 (a)
It is a B-2B sectional view.

3A and 3B are diagrams showing an operation of the present invention, in which FIG. 3A is a diagram showing a state where a hard cap is attacked, and FIG. 3B is a diagram showing a state in which a protective ring is broken.

4A and 4B are views showing another embodiment of the present invention, in which FIG. 4A is a sectional view of a handle case, FIG. 4B is a front view of a hard ring body, and FIG. 4C is a 4C-4C line of FIG. FIG.

[Explanation of symbols]

1 housing 2 handle case 3 hard cap 4 cylinder lock 5 protection ring 6 conical surface 7 Thin part 8 hard ring body

Claims (4)

[Claims] 1. A handle case retractably housed in a housing, a cylinder lock having a front surface capped by a hard cap and housed in the handle case, and a cylinder lock for restricting the withdrawing operation of the handle case, and at least a drill hole. The protective ring is formed of a hard material that is difficult to operate, and has a stepless protective ring on the outer periphery that surrounds the peripheral edge of the hard cap to the rear of the rear end, and the protective ring has a cone that gradually contracts toward the rear. Handle lock with which the surface is formed. 2. The handle lock according to claim 1, wherein a thin portion corresponding to a position near the rear end of the hard cap is formed on the entire circumference of the protective ring. 3. The handle lock according to claim 2, wherein the protective ring is made of a brittle material and breaks from the thin portion when an impact is applied. 4. A handle case housed in the housing so as to be able to be pulled out, and a cylinder lock that is housed in the handle case by being capped with a hard cap on the front surface, and that restricts the pull-out operation of the handle case. A handle lock in which a hard ring body having an outer diameter of the rear end at least equal to or smaller than that of the hard cap is arranged near the rear end of the hard cap.