JP2004285612A - Cover for preventing fraudulent operation of thumb-turn - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provided a cover for preventing fraudulent operation of a thumb-turn easily mounted/removed, preventing a thumb-turn of a locking device from being fraudulently operated to unlock from the outdoors when installed and capable of being locked/unlocked easily from the indoors. <P>SOLUTION: A cover is equipped with a ring body which is fixed integrally with a thumb-turn knob part by being pressed in, a spring, and an almost cylindrical cover body for covering the axial outer periphery of the ring body. When the cover body is in a position to be urged by the spring, the cover body is in the state of being idle with respect to the ring body, and the fraudulent operations from the outdoors are prevented. In a prescribed axial position wherein the cover body is pulled for movement, the cover body and the ring body are engaged with each other so that the cover body can be turned only integrally with the ring body. In this state, the ring body, which is integrally engaged with the cover body by turning the cover body, is turned, and the thumb-turn knob part, which is pressed into and fixed to the ring body, is turned so that the thumb-turn can be operated. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a cover for preventing unauthorized operation of a thumb-turn for preventing unlocking caused by illegally operating a thumb-turn knob of a locking device attached to the opening / closing body from outside the opening / closing body.
[0002]
[Prior art]
A locking device with a thumb-turn that is attached to an opening / closing body such as the entrance door of a condominium or residence to lock and unlock it is a rotary type that exposes a cylinder lock with a keyhole on the outside and rotates it indoors The Samturn is exposed. From the outdoor side, it is possible to lock and unlock the entrance door etc. by inserting the duplicate key (key) into the keyhole and rotating it, and from the indoor side, just rotate the thumb turn without using the duplicate key It is possible to perform locking and unlocking. FIG. 5 shows an example of a conventional thumb turn.
[0003]
In recent years, according to newspaper reports and the like, damage caused by so-called picking in which such a locking device is illegally operated and unlocked has occurred frequently. Various picking methods have been clarified, and one of them is known to illegally operate a thumb turn located indoors from the outdoor side. This is done by inserting a wire or metal rod with a hooked tip into this hole from outside, such as by drilling a hole in the entrance door, etc. at a position adjacent to the locking device. It is operated by hanging the thumb turn with the tip.
[0004]
2. Description of the Related Art Conventionally, it has been known to attach a cover to a thumb turn to prevent unauthorized operation of the thumb turn from the outdoor side (see Patent Document 1). In this technique, a cover provided with a lid that can be opened and closed is attached to the inner surface of the door by using a double-sided adhesive means or an adhesive, or by using screws, bolts, or the like so as to cover the thumb turn. From indoors, while allowing the thumb-turn to be easily operated by opening the lid provided on the cover, wires and the like that are illegally inserted from the outdoors can be easily turned to the thumb-turn because of the cover that covers the thumb-turn. Can not be hung. As a result, an unauthorized unlocking operation from outside can be prevented.
[0005]
However, there is a drawback in that the conventional one requires some time to attach, and in some cases, it is expensive to ask a specialist. It was hard to say that the cover was easy to attach to the door. Unskilled people can apply beautiful glue and drill holes for screw installation on finished and already installed doors, which requires some skill. Further, when it is necessary to return to the current state as in the case of a rental house or the like, it is not easy to remove the cover once attached.
[0006]
[Patent Document 1]
JP-A-2003-56218
[Problems to be solved by the invention]
SUMMARY OF THE INVENTION The present invention solves the above-described problems, can be easily attached and detached, and at the time of attachment, prevents unauthorized operation of the thumb turn of the locking device from the outside to unlock the lock device, and easily from indoors. It is an object of the present invention to provide a cover for preventing unauthorized operation of a thumb-turn that can perform locking and unlocking operations.
[0008]
[Means for Solving the Problems]
The thumb-turn unauthorized operation prevention cover of the present invention is for preventing unlocking by illegally operating a thumb-turn knob of a locking device attached to an opening / closing body such as a front door from outside the opening / closing body. A ring body fixed integrally with the thumb-turn knob by press-fitting the portion, a spring, and a substantially cylindrical cover body covering an outer periphery of the ring body in the axial direction. By applying a spring in the axial direction between the ring main body and the cover main body, the cover main body is urged to the opening / closing body side, and when the cover main body is in a position urged by the spring, the ring main body is Cover body is idle. When the cover body that covers the ring body idles, unauthorized operation from the outside is prevented. At a predetermined axial position where the cover body is pulled and moved against the action of the spring, there is provided a means for engaging the cover body with the ring body so that the cover body rotates only integrally with the ring body. In this state, the ring body integrally engaged with the cover body is rotated by rotating the cover body, and further, the thumb-turn knob pressed and fixed thereto is rotated and operated.
[0009]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, the present invention will be described based on examples. The thumb-turn tamper-proof cover according to the present invention includes a ring main body that is press-fitted into a thumb-turn knob of a locking device attached to an opening / closing body such as a front door, and a cover main body that is biased toward the door by a spring. Is done. The thumb-turn knob is normally in a locked state when it is in a horizontal state, and can be unlocked by rotating it in a vertical state. However, as shown in FIG. It is configured in a shape. The plate-shaped portion is integrally fixed by press-fitting the press-fit portion of the ring main body.
[0010]
FIG. 1 is a diagram illustrating the configuration of a ring main body. FIG. 1A shows a view of the ring main body as viewed from the thumb-turn press-fitting side, and FIG. ). As illustrated, the ring main body has a substantially cylindrical outer shape, and a press-fit portion for press-fitting and fixing the thumb-turn knob is formed inside the ring main body. The press-fitting portion is configured by providing a pair of holding bodies for holding and fixing from both sides of the thumb-turn knob portion inside the ring main body. Further, on the side where the thumb-turn knob is press-fitted, a pair of press-fit guides each having a slightly wider interval are provided on each of the pair of holding bodies in order to facilitate press-fitting. Further, the ring body is provided with a lid on the side opposite to the press-fit side. The lid also functions as a stopper for the press-fit thumb-turn knob. The lid is also a part for applying a force by pressing a thumb or the like of the thumb in order to press the thumb into the thumb-turn knob.
[0011]
The ring main body is preferably integrally formed of a synthetic resin (for example, polycarbonate made of a plastic material) together with a pair of holding bodies and a pair of press-fitting guides. Further, the lid can be integrally formed of a synthetic resin, but it is also possible to form the lid separately and then fit it. The pair of holding bodies constituting the press-fitting section are not limited to synthetic resins, but may be made of metal such as stainless steel, as long as they have elasticity enough to hold and fix the thumb-turn knob.
[0012]
As shown in FIG. 1B, a gear portion that engages with a gear portion of the cover body described later is formed on the outer peripheral surface of the ring body. Also, a step 2 serving to axially position the two gear portions so as to be able to engage with each other, and a step 1 serving as an engaging portion for engaging a spring inserted between the ring main body and the cover main body. Is provided. In addition, when the cover main body is in a predetermined positional relationship in the axial direction with respect to the ring main body, the cover main body is integrally engaged with the fixed ring main body, and the cover main body is rotated only integrally (in short, In order to prevent relative rotation between the two), the meshing of the two gear portions is used as illustrated. However, as long as the two can be integrally engaged at the predetermined axial position and the engagement can be released at other axial positions, the gear is not necessarily limited to the gear. Not something. For example, as illustrated, it is not always necessary to provide gears at equal intervals on the entire circumference. At least one protrusion is provided on one side, and a recess is provided on the other side so that the two can be integrally engaged. It is possible to combine.
[0013]
FIG. 2 is a view illustrating the configuration of the cover main body. FIG. 2A shows a view of the cover main body having a substantially cylindrical shape as viewed in the axial direction, and a cross section as viewed in the YY direction in the figure. The figure is shown in (B). Note that the term “axial direction” is used as a term that refers to the central axis direction of a cylindrical shape. Around the same central axis, not only the cover body but also the multiple ring-shaped spring and ring body are positioned. The axial length of the cover body should be longer than the corresponding length of the press-fit ring body and thumb-turn knob, and should be long enough to cover and conceal it.
[0014]
As illustrated, the cover body is provided with a gear portion that engages with the gear portion of the ring body. The outer surface of the cover body is formed with irregularities such as a corrugated shape so that the hand can be easily gripped without slipping during operation. The cover body is preferably made of a synthetic resin in terms of cost, but other materials such as metal can be used.
[0015]
FIG. 3 is a view showing a state before the thumb-turn unauthorized operation prevention cover of the present invention, which includes a ring main body, a spring, and a cover main body, is attached. FIG. 4 is a view for explaining the operation of the thumb-turn tamper-proof cover of the present invention by press-fitting the thumb-turn knob into the thumb-turn knob, and a schematic sectional view is shown in FIG. (B) shows a detailed view of the portion, and (C) shows a detailed view of the Z portion when no operation is performed. The illustrated spring is configured by bending an elastic metal wire into a multiple ring shape so as to have a diameter located on the outer peripheral side of the ring main body and the inner peripheral side of the cover main body.
[0016]
Before the thumb-turn tamper-proof cover of the present invention is attached to the thumb-turn knob, the ring main body, the spring, and the cover main body do not necessarily need to be integrally connected or fixed, and are usually illustrated in FIG. As you can see, they are separate. These are assembled together by attaching them to the thumb turn knob.
[0017]
In the positional relationship shown in FIG. 3, a spring is inserted into the cover main body, and the spring is held down by the spring engaging portion (step 1 shown in FIG. 1B) of the ring main body, and the ring main body is placed on the door side. (The thumb turn side), and press-fit the thumb-turn knob into the press-fit portion of the ring body. This completes the attachment and fixation of the thumb-turn tamper-proof cover of the present invention to the thumb-turn knob.
[0018]
As described above, the thumb-turn knob is press-fitted into the ring main body, and is fixed thereby. If the ring main body is rotated in this state, the thumb turn knob fixed to the ring main body can be rotated. The spring is positioned in the axial direction between the engaging portion of the ring main body and the engaging portion of the cover main body (the side of the gear portion provided on the cover main body opposite to the axial door) (see FIG. 4). Further, the spring is radially located between the inner peripheral side of the cover main body and the outer peripheral side of the small diameter portion of the ring main body as illustrated in FIG. The large diameter portion of the ring main body has a diameter slightly smaller than the inner diameter of the cover main body, and is configured to be insertable inside the cover main body.
[0019]
During non-operation, the spring is extended to urge the cover body toward the door in the axial direction (see FIGS. 4A and 4C). During this non-operation, the cover body is urged toward the door in the axial direction by a spring, but its movement is usually restricted by a ring-shaped thumb-turn pedestal or the like. However, the rotation of the cover body is not regulated at all. In short, the cover main body can be rotated, but even if the cover main body is rotated, the cover main body is idle and the ring main body does not rotate.
[0020]
In this non-operation state, the ring main body is inside the cover main body (see FIG. 4A). At this time, even if an attempt is made to operate the thumb-turn knob or the ring main body fixed thereto using an instrument from the outside of the door with the above-described unauthorized means, since the cover main body covers them, it must be operated. Can not. Only the cover main body can be operated from the outside. However, even if the cover main body is rotated, the cover main body only idles and cannot rotate the ring main body.
[0021]
The only operation for locking and unlocking from the indoor side is to rotate the cover body while pulling the cover body toward the side opposite to the axial door. Thus, the thumb-turn knob fixedly pressed into and fixed to the ring main body can be rotated. When the cover body is pulled to the side opposite to the axial door, as shown in FIG. 4 (B), an engaging portion provided on the cover body (an axially opposite side surface of the gear portion and an engaging portion at one end of the spring). ) Is engaged with the engaging portion (the step 2 illustrated in FIG. 1B) provided on the ring main body, and the movement to the opposite side of the door in the axial direction is restricted. At a predetermined axial position where the movement is restricted, the gear portion provided on the cover body and the gear portion provided on the ring body are in mesh with each other. That is, when the cover main body is rotated in this state, the ring main body is rotated.
[0022]
To remove the thumb-turn tamper-proof cover of the present invention, simply pull the cover body strongly toward the opposite side of the axial door. As described above, during operation, the cover body is pulled toward the opposite side of the axial door, and the engagement portion provided on the cover body is rotated while being engaged with the engagement portion provided on the ring body. By pulling the cover body more strongly from the combined state, the ring body fixed by press-fitting can be removed. After removal, it can be removed very easily without leaving any traces of adhesive or screw holes.
[0023]
【The invention's effect】
The thumb-turn tamper-proof cover of the present invention can be easily attached and detached, and can be operated for locking and unlocking only when it is pulled by hand. It is possible to reliably prevent unauthorized operation by the effect of turning back to the position.
[0024]
In addition, the present invention can be mounted and removed with one touch without requiring any parts or tools, so that there is no need to pay a technical fee to a specialist for installation work, or to a rental house or the like. It is possible to easily perform the necessary return to the current state.
[Brief description of the drawings]
FIG. 1 is a view exemplifying a configuration of a ring main body. FIG. 1 (A) shows a view of the ring main body viewed from a thumb-turn press-fitting side, and FIG. 1 (B) shows a cross-sectional view of the ring main body viewed in the XX direction. ).
FIG. 2 is a view illustrating the configuration of the cover main body, and FIG. 2A is a view of the cover main body having a substantially cylindrical shape as viewed in the axial direction, and is a cross-section viewed in the YY direction in the drawing. The figure is shown in (B).
FIG. 3 is a view showing a state before a thumb-turn tamper-proof cover of the present invention, which is composed of a ring main body, a spring, and a cover main body, is attached.
4A and 4B are diagrams illustrating press-fitting of a thumb-turn unauthorized operation preventing cover of the present invention into a thumb-turn knob to operate the cover, and a schematic cross-sectional view is shown in FIG. (B) shows a detailed view of the section, and (C) shows a detailed view of the Z section at the time of non-operation.
FIG. 5 is a diagram showing an example of a thumb turn conventionally used.

Claims (5)

In a thumb-turn unauthorized operation prevention cover for preventing unlocking by illegally operating the thumb-turn knob of the locking device attached to the opening / closing body from outside the opening-closing body,
A ring body fixed integrally with the thumb-turn knob by press-fitting the thumb-turn knob;
With a spring,
A substantially cylindrical cover body that covers an axial outer periphery of the ring body,
By actuating the spring in the axial direction between the ring body and the cover body to urge the cover body toward the opening and closing body side, and when the cover body is in a position urged by the spring, The cover body is idle with respect to the ring body,
Means for engaging the cover body with the ring body at a predetermined axial position where the cover body is moved against the action of the spring so that the cover body rotates only integrally with the ring body. In the combined state, the cover body is rotated to operate the ring body integrally engaged with the cover body, and further, the thumb-turn knob pressed and fixed thereto is rotated and operated.
Thumb turn protection cover The thumb-turn tamper-proof cover according to claim 1, wherein the means for engaging the cover main body with the ring main body is provided with a gear portion provided on each of the two and engaged with each other. 2. The cover according to claim 1, wherein the press-fit portion of the ring main body for press-fitting the thumb-turn knob comprises a pair of elastic holding members provided on the cover main body. 3. 2. The cover according to claim 1, wherein the ring main body has a cover on the side opposite to the press-fit side. 2. The cover according to claim 1, wherein the ring main body is integrally formed of a synthetic resin.

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