JP4064165B2 - Thumb turn cover - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a thumb turn cover that covers a thumb turn used for a door locking / unlocking operation.
[0002]
[Prior art]
For example, a locking device provided on a door can be used to insert a dead key that has been advanced and retracted from the door end of the door by inserting a key into the keyhole of a cylinder lock that is exposed to the outside and turning it. Engage and disengage from the strike provided on the door to lock and unlock the door, and from the indoor side, simply rotate the thumb-turn knob to move the deadbolt forward and backward to easily lock and unlock the door. I am doing so.
[0003]
However, in recent years, unauthorized unlocking has been increasing in which a wire or the like is inserted from a post opening or a small hole opened by a machine tool, and is locked and rotated by a thumb turn that is easy to rotate to unlock the locking device. For example, there is a thumb turn security cover disclosed in Japanese Utility Model Publication No. 4-40362 which prevents the thumb turn from being locked and rotated.
[0004]
As shown in FIGS. 3 and 4, the security cover 1 is formed with a fitting hole 3 into which the thumb turn 2 is fitted, and a portion covering the outer surface 2 a of the thumb turn 2 that draws a circular locus 2 b during rotation is circular. It is formed in a circular shape along the shape locus. Then, set screws 4 and 4 are provided which are screwed into the fitting holes 3 to come into contact with the side surfaces of the thumb turn 2 and are clamped from both sides.
In the crime prevention cover 1 having such a configuration, the thumb turn 2 is covered with the thumb turn 2 by inserting the thumb turn 2 into the insertion hole 3. Then, the security cover 1 is fixed to the thumb turn 2 by screwing the set screws 4 and 4 and tightening them from both sides. Therefore, it becomes difficult to lock the wire or the like by the crime prevention cover 1 placed on the thumb turn 2 and rotate it.
[0005]
As another aspect of the above-described crime prevention cover, as shown in FIG. 5, a crime prevention cover 1 configured by an attachment portion 5 and a main body portion 6 is disclosed. The attachment portion 5 is formed so that the outer shape of the crime prevention cover 1 is easily operated by hand, and is provided with a locking projection 5a that the main body portion 6 locks. The mounting portion 5 can easily rotate the thumb turn 2 in a state where it is covered with the thumb turn 2. Moreover, the main-body part 6 has the latching | locking part 6a which can be latched to the latching protrusion 5a. By doing in this way, the crime prevention cover 1 can be attached or detached by a simple operation called a locking operation. Furthermore, when the main body 6 is idled by the locking portion 6a, it becomes impossible to lock and rotate the wire or the like.
[0006]
Furthermore, as another aspect of the above-described crime prevention cover, as shown in FIG. 6, a spring member 8 is provided in the locking portion 6 a between the locking protrusion 5 a and a plurality of outer peripheral edges on the mounting portion 5 side. In addition to the provision of the engagement recess 5b, an engagement protrusion 6b that can be engaged with the engagement recess 5b is provided on the inner peripheral surface of the main body 6.
With such a configuration, the main body 6 can always be left attached. That is, when the main body 6 is idled by the locking projection 5a and the locking portion 6a at all times and the thumb turn 2 is to be rotated, the main body 6 is pressed by hand, and the engaging convex portion 6b is attached to the mounting portion 5 The thumb turn 2 could be rotated by engaging with the engaging recess 5b and rotating the main body 6 in this engaged state.
[0007]
[Problems to be solved by the invention]
However, since the outer shape of the security cover shown in FIGS. 3 and 4 is a cylindrical body, when it is put on the thumb turn, it is originally an oval shape, so that the thumb turn can be visually recognized by its rotational position or not. There is a problem that the locked state becomes invisible and the operability of locking and unlocking is lowered.
[0008]
Further, the security cover shown in FIG. 5 is composed of an attachment portion that enables the thumb turn to rotate, and a main body portion that idles and is detachable with respect to the attachment portion. Storage management becomes complicated and there is a risk of losing the main body.
[0009]
Furthermore, since the security cover shown in FIG. 6 can always keep the main body part attached, the main body part is not lost, but when rotating the thumb turn, the main body part must be rotated while being pressed by hand. Reduced operability.
[0010]
The present invention has been made in view of the above situation, and the first object thereof is to prevent unauthorized rotation of the thumb turn by a wire or a rod, etc. The purpose is to provide a thumb-turn cover that can be used to improve crime prevention and operability. The second object is to provide a thumb turn cover in which the rotational position of the thumb turn can be easily recognized, thereby improving operability.
[0011]
[Means for Solving the Problems]
Next, means for solving the above problems will be described with reference to the drawings corresponding to the embodiments.
The thumb turn cover 11 according to claim 1 of the present invention is a thumb turn cover 11 that covers a thumb turn 21 that is exposed on the door surface 27 so as to be rotatable.
A substantially hemispherical convex cover portion 13 which covers and covers the thumb turn 21 in the concave space 19;
A fixing plate 17 provided continuously to the opening peripheral edge 15 of the convex cover portion 13 and bonded to the door surface 27 through an adhesive means;
At least the convex cover portion 13 has rigidity to maintain a substantially hemispherical shape, and is made of a flexible material that can be rotated by the picking force and turning force from the outside to enable the thumb turn 21 to rotate. It is characterized by.
[0012]
In the thumb turn cover 11, the thumb turn 21 is normally covered with a substantially spherical convex cover portion 13, and since the convex cover portion 13 has a predetermined rigidity, the thumb turn 21 is prevented from rotating by a wire, a bar, or the like. Is done. On the other hand, when the thumb turn 21 is operated, the convex cover portion 13 is deformed by being picked, and the operation by the pick turning as in the prior art becomes possible.
[0013]
The thumb turn cover 11 according to claim 2 is the thumb turn cover 11 according to claim 1,
The convex cover portion 13 has transparency that allows the thumb turn 21 to be seen through.
[0014]
In this thumb turn cover 11, the thumb turn 21 covered by the convex cover portion 13 can be seen through the transparent convex cover portion 13, the rotational position of the thumb turn 21 can be seen, and the thumb turn 21 is locked. Alternatively, the unlocked state can be easily grasped.
[0015]
The thumb turn cover 11 according to claim 3 is the thumb turn cover 11 according to claim 1 or 2,
The convex cover portion 13 has a through hole 31 that allows the concave space 19 to communicate with the outside.
[0016]
In the thumb turn cover 11, when the convex cover portion 13 is picked, the air in the concave space 19 is discharged to the outside through the through hole 31. Thereby, the deformation resistance of the convex cover part 13 by the concave space 19 becoming a sealing state becomes small, and the operation which picks and rotates the thumb turn 21 with the convex cover part 13 becomes easy.
[0017]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, preferred embodiments of a thumb turn cover according to the present invention will be described in detail with reference to the drawings.
FIG. 1 is a longitudinal sectional view of a thumb turn cover according to the present invention attached to a door, and FIG. 2 is an operation explanatory view of the thumb turn cover shown in FIG.
[0018]
The thumb turn cover 11 includes a substantially hemispherical convex cover portion 13 and a fixing plate 17 provided continuously to the opening peripheral edge 15 of the convex cover portion 13. The convex cover portion 13 is formed in a substantially hemispherical shape so that the inside of the opening peripheral edge 15 is a concave space 19. The convex cover portion 13 accommodates and covers the thumb turn 21 in the concave space 19.
[0019]
The fixing plate 17 is formed in, for example, a quadrangle, and has a hole 25 through which the decorative ring 23 of the thumb turn 21 is inserted at the center. Since the convex cover portion 13 has a substantially hemispherical shape, the peripheral edge 15 of the opening is circular. The opening peripheral edge 15 of the convex cover portion 13 is connected to the fixed plate 17 outside the hole 25.
[0020]
Note that the fixing plate 17 may be provided so as to protrude from the opening peripheral edge 15 of the convex cover portion 13 outward in the radial direction in a flange shape. In this case, the periphery 17a of the hole 25 is formed so as not to extend inside the opening periphery 15.
[0021]
The fixing plate 17 is bonded to the door surface 27 through a bonding means (not shown) on the surface opposite to the continuous surface of the convex cover portion 13 serving as the back surface. Examples of the bonding means include a double-sided tape and an adhesive. If a double-sided tape is affixed to the back surface of the fixing plate 17, it can be easily fixed to the door surface 27 only by removing the release paper. Further, in the case of an adhesive, the adhesive surface is formed in a layered manner, and the release paper is stuck on the surface, so that the fixing to the door surface 27 is facilitated similarly to the double-sided tape.
[0022]
Here, at least the convex cover portion 13 has a rigidity to maintain a spherical shape, and is easily deformed by the picking force and turning force by a finger from the outside as shown in FIG. Made of a flexible material. Therefore, at all times, the convex cover portion 13 holds a substantially hemispherical shape (so-called dome shape) and accommodates the thumb turn 21 in an inaccessible manner. As a result, the substantially hemispherical convex cover portion 13 has a predetermined rigidity as described above. Therefore, even if an attempt is made to lock the thumb turn 21 with a wire or the like whose tip is bent into a hook shape, The part is slid to prevent the thumb turn 21 from being locked.
[0023]
On the other hand, when the thumb turn 21 is operated, if the thumb turn 21 is picked from the outside of the convex cover portion 13, the convex cover portion 13 is crushed and the thumb turn 21 is picked via the convex cover portion 13 as shown in FIG. It becomes possible. Thereafter, even if the thumb turn 21 is rotated together with the convex cover portion 13, the thumb turn 21 can be rotated while the convex cover portion 13 is twisted due to the flexibility of the convex cover portion 13. Then, when the finger is released after the turning operation, the convex cover portion 13 becomes the original substantially hemispherical shape again by the elastic restoring force.
[0024]
Here, it is desirable that the convex cover portion 13 has transparency that allows the thumb turn 21 to be seen through. As a flexible material having flexibility and transparency, for example, rubber, particularly silicon rubber is suitable, and soft vinyl and the like can be exemplified. In this way, by using a transparent flexible material for the convex cover portion 13, the thumb turn 21 covered by the convex cover portion 13 becomes visible through the transparent convex cover portion 13. The state (rotational position) can be visually recognized. Thereby, the locked state or the unlocked state of the thumb turn 21 can be easily grasped.
[0025]
The above-described convex cover portion 13 and the fixing plate 17 can be integrally molded by, for example, any one of the flexible materials described above. For example, as a structure integrally formed by injection molding, compression molding, or the like. The peripheral edge 17 a of the hole 25 does not extend inside the opening peripheral edge 15. Of course, the convex cover portion 13 and the fixing plate 17 may be formed by joining members formed by different members, and the substantially hemispherical convex cover portion 13 is formed by injection molding or compression molding. The fixing plate 17 may be joined and fixed to the outer periphery of the fixing plate 17 by means such as adhesion.
[0026]
The convex cover portion 13 has a through hole 31 that allows the concave space 19 to communicate with the outside. The through-hole 31 may be a small hole shown in FIG. 1 that evacuates the air in the concave space 19 when, for example, the convex cover portion 13 is pressed. By providing such a through hole 31, when the convex cover portion 13 is picked, the air in the concave space 19 is discharged to the outside through the through hole 31. Thereby, the deformation resistance of the convex cover part 13 by the concave space 19 becoming a sealing state becomes small, and the operation which picks and rotates the thumb turn 21 with the convex cover part 13 becomes easy.
[0027]
Therefore, according to the thumb turn cover 11 configured as described above, in the thumb turn cover 11 that covers the thumb turn 21 exposed on the door surface 27 so as to be rotatable, the thumb turn 21 is normally a convex cover portion having a substantially hemispherical shape. 13 and the convex cover portion 13 has a predetermined rigidity, so that the thumb turn 21 is prevented from rotating by a wire, a bar or the like.
[0028]
On the other hand, when the thumb turn 21 is operated, the convex cover portion 13 is deformed by being picked, and the operation by the pick turning as in the prior art becomes possible. As a result, it is possible to prevent the rotation of the thumb turn 21 by a wire, a bar, or the like, to eliminate the need for a conventional detachable member, and to enable the same easy operation by picking rotation as in the prior art.
[0029]
In the above embodiment, the case where the convex cover portion 13 has a substantially hemispherical shape has been described. However, the convex cover portion may have a convex curved surface whose outer shape is difficult to be locked by a collar portion or the like. For example, it is not limited to a hemispherical shape, for example, it may be a dome shape such that a cross section parallel to the axis and passing through the axis is substantially elliptical, substantially triangular pyramid, substantially trapezoidal, substantially square, etc. Even with such a shape, the same actions and effects as described above can be obtained.
[0030]
【The invention's effect】
As described above, according to the thumb turn cover of the first aspect of the present invention, the substantially hemispherical convex cover portion that covers the thumb turn, and the fixing plate that is provided continuously to the opening periphery of the convex cover portion, And the convex cover portion has a rigidity that maintains a substantially hemispherical shape, and is made of a flexible material that is capable of turning the thumb turn by being deformed by a pinch force and a turning force from the outside. Normally, the thumb turn is covered with a substantially hemispherical convex cover, which prevents rotation of the thumb turn by a wire or a rod. Operation by rotation can be made possible. As a result, other members such as a detachable member are not required, and crime prevention and operability can be improved.
[0031]
According to the thumb turn cover of claim 2, since the convex cover portion has transparency that allows the thumb turn to be seen through, the rotational position of the thumb turn can be easily seen and the operability can be improved. it can.
[0032]
According to the thumb turn cover of the third aspect, since the convex cover portion has a through hole that allows the concave space to communicate with the outside, the air in the concave space passes through the through hole when the convex cover portion is picked. Thus, the deformation resistance of the convex cover portion due to the discharge to the outside and the concave space being sealed can be reduced. As a result, it is possible to improve the operability when the thumb cover is picked and rotated together with the convex cover portion.
[Brief description of the drawings]
FIG. 1 is a longitudinal sectional view of a thumb turn cover according to the present invention attached to a door.
FIG. 2 is an operation explanatory view of the thumb turn cover shown in FIG. 1;
FIG. 3 is a perspective view showing a state in which a conventional crime prevention cover is attached to a door.
4 is a cross-sectional view showing an internal state of the conventional crime prevention cover shown in FIG. 3. FIG.
5 is a partially cutaway side view showing another aspect of the conventional crime prevention cover shown in FIG. 3. FIG.
6 is a partially cutaway side view showing still another aspect of the conventional crime prevention cover shown in FIG. 3. FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 11 ... Thumb turn cover 13 ... Convex cover part 15 ... Opening periphery 17 ... Fixing plate 19 ... Concave space 21 ... Thumb turn 27 ... Door surface 31 ... Through-hole

Claims (3)

It is a thumb turn cover that covers the thumb turn that appears on the door surface so that it can rotate.
A substantially hemispherical convex cover portion that accommodates and covers the thumb turn in a concave space;
A fixing plate that is continuously provided on the periphery of the opening of the convex cover portion and is bonded to the door surface via an adhesive means;
At least the convex cover portion has a rigidity that maintains a substantially hemispherical shape, and is made of a flexible material that is deformable by a picking force and a turning force from the outside to enable the thumb turn to rotate. Thumb turn cover. The thumb turn cover according to claim 1,
The thumb-turn cover, wherein the convex cover portion has transparency that allows the thumb-turn to be seen through. The thumb turn cover according to claim 1 or 2,
The thumb-turn cover, wherein the convex cover portion has a through hole that allows the concave space to communicate with the outside.

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