JP2004156401A - Thumb turn unauthorized release preventing device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a thumb turn unauthorized release preventing device which is resistant to unauthorized release of a thumb turn, does not hinder normal operation of the thumb turn, and advantageous in mounting work and in parts count. <P>SOLUTION: The thumb turn unauthorized release preventing device is provided for the thumb turn 10 which is formed so as to protrude/retreat a dead bolt 3 from a lock box 1 by rotating a knob portion 11 arranged on an indoor side. According to the device, the knob portion 11 is formed so as to be axially perpendicular and to have a circular cross section. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a thumb-turn unauthorized release prevention device.
[0002]
[Prior art]
Generally, as shown in FIG. 6, a cylinder lock is provided so as to pass through a mounting hole O of a key box 1, and when a key 2 is inserted from the outdoor side and turned, a tightening mechanism (shown in FIG. ) Comes and goes from the key box 1 to engage / disengage with the strike plate (not shown).
[0003]
Further, a thumb turn 4 is provided on the indoor side, and the dead bolt 3 can be similarly operated from the indoor side by rotating the thumb turn 4.
[0004]
In the figure, "5" is an outdoor lever, "6" is an indoor lever, "7" is a latch bolt, "8" is a fixing ring, and "9" is a washer.
[0005]
However, recently, there has been a case where the thumb bolt 4 is operated from the outside and the deadbolt 3 is illegally released. For example, a hole is drilled in the gap between the door and the frame or in the door, a string or a wire is inserted from the outside, the tip of which is engaged with the thumb turn 4 on the indoor side, and the dead bolt 3 is operated.
[0006]
As a countermeasure against such illegal release, there is a method of covering the periphery of the thumb turn 4 with a resin plate or the like.
[0007]
[Problems to be solved by the invention]
However, this method is not only unfavorable in appearance, but also has a drawback that the resin plate hinders the normal operation of the thumb turn 7.
[0008]
There is also a means of attaching a super-steel plate to the door to prevent drilling, but this is not only troublesome, but also has no effect depending on the mounting position or size, and is cost-effective. Disadvantageous and not preferred.
[0009]
SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems of the prior art, and it is difficult to perform unauthorized release of a thumb turn, does not become a hindrance at the time of normal use, and is advantageous in terms of mounting work and cost. It is an object to provide a prevention device.
[0010]
[Means for Solving the Problems]
The object of the present invention is achieved by the following means.
[0011]
(1) In a thumb turn in which a deadbolt protrudes and retracts from a key box via a shaft portion and a tightening mechanism by rotating a knob portion provided on the indoor side, the knob portion has a circular cross-section perpendicular to the axis. Samturn's unauthorized release prevention device.
[0012]
(2) The unauthorized release prevention device for a thumb turn according to (1), wherein the knob portion has an outer peripheral surface formed as a middle-high arc surface.
[0013]
(3) The thumb-turn unauthorized release prevention device according to (1) or (2), wherein a collar member provided between the knob portion and the decorative plate has a circular cross-section perpendicular to an axis. .
[0014]
(4) The device for preventing unauthorized turning of a thumb turn according to any one of (1) to (3), wherein the collar member is provided so as to be rotatable around the shaft portion.
[0015]
(5) The thumb-turn unauthorized release prevention device according to any one of (1) to (4), wherein the knob has a fitting groove in the knob to which a knob of the existing thumb-turn is fitted.
[0016]
(6) The device for preventing unauthorized turning of a thumb turn according to the above (5), wherein the shaft portion has a fixing member connected to a knob of the existing thumb turn.
[0017]
(7) The thumb-turn device according to any one of (1) to (6), wherein an alarm device is activated when the knob or the collar member rotates.
[0018]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.
[0019]
<First embodiment>
FIG. 1 is a schematic sectional view showing a thumb turn according to a first embodiment of the present invention, FIG. 2 is an end view along line 2-2 in FIG. 1, and FIG. 3 is a sectional view along line 3-3 in FIG. . The same reference numerals are used for members common to those shown in FIG.
[0020]
In FIG. 1, a thumb turn 10 according to the present embodiment includes a knob 11, a shaft 12 provided integrally with the knob 11, a collar member 13 provided around the shaft 12, and a decorative plate. 14, a spring back member 17 attached to the thumb-turn backing 15 with screws 16 and a thumb-turn backing 15, and a spring 18 for contacting the decorative plate 14 with the door D.
[0021]
When the knob 11 is gripped and rotated, the shaft 12 rotates, and this rotation is transmitted to the tightening mechanism M connected to the end of the shaft 12, and the dead bolt 3 is removed from the key box 1. It is designed to appear and disappear. The dead bolt 3 can also be operated by a cylinder lock (not shown) provided outside the door D.
[0022]
In particular, in the thumb turn 10 of the present embodiment, the knob portion 11 has a circular cross-section perpendicular to the axis so that a string or wire from the outside does not engage. Unauthorized unlocking with a string or wire from the outside is performed by using the flat part of the knob and engaging the string or wire with it, so if this is made circular in cross section, such a situation will occur. This does not occur, and unauthorized release can be easily prevented.
[0023]
Further, when the outer peripheral surface of the knob 11 is also formed as a middle-high arc surface, it is more preferable that a string, a wire, or the like is less likely to be engaged with the knob 11, thereby preventing unauthorized release. However, in order to facilitate the normal operation of the thumb turn 10, an uneven portion 19 may be formed on the outer peripheral surface of the knob 11, as shown in FIG.
[0024]
Depending on the type of the thumb turn 10, the knob 11 is located in the immediate vicinity of the door D and the protrusion length from the door D is short, so that the collar member 13 may not be required to be attached, but the collar member 13 can be used. In the thumb turn 10, it is preferable that the collar member 13 is formed in a circular shape perpendicular to the axis, similarly to the knob portion 11, so that a string or wire from the outside does not engage.
[0025]
Moreover, the collar member 13 is made of a synthetic resin to make it slippery and to form a gap G between the shaft portion 12 and the decorative plate 14 as shown in FIG. With this configuration, the collar member 13 idles even when the string or the wire is engaged, so that the unauthorized release can be further prevented.
[0026]
Next, the operation will be described.
[0027]
It is assumed that a string or a wire is externally inserted into a gap between the door D and the frame or a hole drilled in the door D by a drill, and an attempt is made to engage the tip with the thumb turn 10 on the indoor side.
[0028]
In this case, for example, when a string or wire is to be engaged with the knob portion 11, first, since the outer peripheral surface of the knob portion 11 is a middle-high arc surface, the string or wire is engaged. It is difficult to fall out of the knob part 11 outside or inside. Even if they are engaged, it is not possible to rotate the knob 11 only by pulling the string or the wire because the knob 11 has a circular cross section perpendicular to the axis.
[0029]
Therefore, the knob 11 cannot be operated by an external string or the like, and unauthorized unlocking of the thumb turn 10 using the knob 11 can be prevented.
[0030]
Next, when a string, wire, or the like slides down from the knob 11 and engages with the periphery of the collar member 13 from outside, the collar member 13 may rotate due to the pulling of the string or the like. However, since the collar member 13 is provided so as to be rotatable about the shaft portion 12, the collar member 13 only rotates idly and cannot rotate the shaft portion 12.
[0031]
Therefore, the thumb turn 10 cannot be operated even by pulling the string or the like engaged with the collar member 13, and illegal release is prevented.
[0032]
<Second embodiment>
FIG. 4 is a schematic perspective view showing a thumb turn according to the second embodiment of the present invention. The thumb turn 10a of the second embodiment shown in FIG. 4 is configured to be used in connection with the knob 4a of the existing thumb turn 4.
[0033]
Generally, the knob 4a of the existing thumb tern 4 has a shape in which a plate-shaped knob 4a protrudes from a disk-shaped base. Therefore, the knob portion 11a of the thumb turn 10a connected to the knob 4a of the existing thumb turn 4 has a shorter shaft portion 12a than the shaft portion 12 of the first embodiment described above, and a fitting groove into which the knob 4a is fitted at the tip. 20 are formed, and a through hole 21 is also formed on the side of the fitting groove 20.
[0034]
The collar member 13a has a through hole 22 through which a fixing member 22 such as a screw is inserted from outside when the knob 4a is fitted to the shaft portion 12a. However, the fixing member 22 may use not only a screw but also a tape having an adhesive applied to both surfaces. In this case, the through holes 21 and 22 need not be provided.
[0035]
In order to attach the thumb turn 10a configured as described above, first, a collar member 13a is provided so as to cover the knob 4a of the existing thumb turn 4, and then the shaft portion 12a of the knob portion 11a is inserted into the collar member 13a. The knob 4a is fitted into the fitting groove 20 formed at the tip of the shaft portion 12a.
[0036]
After this fitting, the fixing member 22 such as a screw is inserted through the through hole 23 of the collar member 13. In the case of a screw, the screw is inserted up to the through hole 21 of the shaft portion 12a so as not to hinder the rotation of the collar member 13.
[0037]
The knob 4a is connected to the shaft portion 12a by the screw insertion of the screw, and the collar member 13a is held so as to be able to spin around the shaft portion 12a.
[0038]
As a result, even in the present embodiment, even if a string, wire, or the like is inserted from the outside, the collar slides down from the knob portion 11, and when engaged with the periphery of the collar member 13a, the collar is also pulled by the string or the like. The member 13 only idles around the shaft portion 12a, does not rotate the shaft portion 12a, and prevents unauthorized release of the thumb turn 10a.
[0039]
<Third embodiment>
FIG. 5 is a schematic explanatory view showing a thumb turn according to the third embodiment of the present invention. The thumb turn 10b of the third embodiment shown in FIG. 5 is configured so that the alarm device 30 is activated when the collar member 13b rotates. The collar member 13 of the present embodiment is provided with a cam portion 31 at a part thereof, and the alarm device 30 is operated by the cam portion 31.
[0040]
The alarm device 30 is provided below the cam portion 31 so that a driven plate 33 repelled by a spring 32 abuts on the collar member 13b. When the driven plate 33 is lowered by the cam portion 31, a switch 34 is provided. Is turned on, and the buzzer 35 issues an alarm.
[0041]
With this configuration, the string or wire inserted from the outside engages around the collar member 13b, and when the collar member 13b idles around the shaft portion 12 even by pulling the string or the like, the driven plate 33 is It is pushed by the cam portion 31 and descends.
[0042]
As a result, the switch 34 is turned on, the buzzer 35 issues an alarm, and the illegal release of the thumb turn 10b is prevented.
[0043]
In the present embodiment, the cam portion 31 is provided on the upper portion of the collar member 13b, and the driven plate 33 is brought into contact with the opposite side by 180 °, that is, an alarm is issued when the collar member 13 is rotated by 180 °. However, it goes without saying that the positional relationship between the cam portion 31 and the driven plate 33 may be any angular relationship.
[0044]
In the above-described embodiment, the cam portion 31 is provided on the collar member 13b. However, the present invention is not limited to this, and the cam portion 31 may be provided on the knob portion 11.
[0045]
As described above, according to the present invention, even if the knob 11 or the collar member 13 is directly attached using the thumb turn or the existing thumb turn, the illegal opening does not need to be performed to attach the super steel plate to the door in order to prevent drilling. Since the lock can be prevented, it is advantageous and preferable in terms of installation work of the device or cost. Further, since the thumb turn 10 and the collar member have a circular cross-section perpendicular to the axis, the forming process is easy, which is advantageous in terms of cost.
[0046]
The present invention is not limited to only the above-described embodiments, but can be variously modified within the scope of the claims. For example, in the above-described embodiment, the knob portion 11 has a circular cross-section perpendicular to the axis, but the “circle” here may be slightly deformed, and in some cases, an arc shape and a concave portion are repeated. Such a thing may be used. In other words, it suffices that the entirety be a substantial circle as a whole such that a string or a wire from the outside cannot be engaged.
[0047]
Further, a ball or the like may be used to enhance the turning property of the thumb turn. Furthermore, as for the alarm device, any device can be used as long as it can notify the residents and the like of the unauthorized release of the thumb turn, and various devices such as those that appeal not only to hearing but also to sight and touch can be considered. .
[0048]
【The invention's effect】
As described above, according to the first aspect of the present invention, since the knob portion has a circular shape in a cross section perpendicular to the axis, it is difficult to perform unauthorized release of the thumb turn, does not become a hindrance during normal use, and is not required in terms of mounting work or the number of parts. Can be advantageous. In addition, manufacturing can be facilitated, which is advantageous in terms of cost.
[0049]
According to the second aspect of the present invention, since the outer peripheral surface of the knob portion is a middle-high circular arc surface, it is further difficult to perform unauthorized release of the thumb turn.
[0050]
According to the third aspect of the present invention, since the collar member has a circular cross-section perpendicular to the axis, it is more difficult to perform unauthorized release of the thumb turn, and it is easy to manufacture, which is advantageous in terms of cost.
[0051]
According to the fourth aspect of the present invention, the collar member is rotatable about the shaft portion, so that it is more difficult to perform unauthorized release of the thumb turn.
[0052]
According to the fifth and sixth aspects of the present invention, since the thumb turn is formed by fitting the shaft portion to the knob body of the existing thumb turn, unauthorized release of the thumb turn can be performed at extremely low cost.
[0053]
According to the invention of claim 7, the alarm device is activated when the knob or the collar member is rotated, so that only the thumb turn is operated improperly, it is possible to inform a resident or the like, and the improper release. This can make it difficult to perform itself.
[Brief description of the drawings]
FIG. 1 is a schematic sectional view showing a first embodiment of the present invention.
FIG. 2 is an end view taken along line 2-2 of FIG. 1;
FIG. 3 is a sectional view taken along line 3-3 in FIG. 1;
FIG. 4 is a schematic perspective view showing a second embodiment of the present invention.
FIG. 5 is a schematic explanatory view showing a third embodiment of the present invention.
FIG. 6 is an exploded perspective view of a conventional thumb turn portion.
[Explanation of symbols]
1 ... key box,
3: Deadbolt,
4a ... knob body,
10 ... Samtern,
11 ... knob,
12 ... Shaft,
13 ... Color members,
14… Veneer board,
19 ... recess,
20 ... fitting groove,
22 ... fixing member,
30 ... alarm device,
M: tightening mechanism.

Claims (7)

In a thumb turn in which a dead bolt (3) is protruded and retracted from a key box (1) via a shaft (12) and a tightening mechanism (M) by rotating a knob (11) provided on the indoor side, the knob is provided. A device for preventing unauthorized release of a thumb turn, wherein the portion (11) has a circular cross section perpendicular to the axis. 2. The device according to claim 1, wherein the knob has an outer peripheral surface formed as a middle-high circular arc surface. 3. The said thumb turn (10) made the collar member (13) provided between the said knob part (11) and the decorative board (14) circular cross-section perpendicular to an axis | shaft, The Claim 1 or 2 characterized by the above-mentioned. An unauthorized release prevention device for the described thumb turn. The device according to any one of claims 1 to 3, wherein the collar member (13) is provided so as to be rotatable about the shaft (12). The thumb turn according to any one of claims 1 to 4, wherein the knob portion (11) has a fitting groove (20) in the shaft portion (12) into which the knob body (4a) of the existing thumb turn (4) fits. Unauthorized release prevention device. The device according to claim 5, wherein the shaft (12) has a fixing member (22) connected to the knob (4a) of the existing thumb turn (4). The alarm device (30) of the thumb turn (10) is activated when the knob (11) or the collar member (13) rotates. Thumb Turn unauthorized release prevention device.

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