JP2004339851A - Crime-preventing thumb-turn lock cover device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a thumb-turn lock cover which does not easily move upward unless it is opened with more than two fingers pressing it down. <P>SOLUTION: The crime-preventing thumb turn lock cover device is fixed to surround a thumb-turn lock on an inner wall of a door. Furthermore, it is composed of a guide support member with a first engaged portion on its right- and left-side frame sections and an engaging portion to engage with the first engaged portion. Moreover, when holding up the thumb turn cover with the fingers to slide upward, a knob portion for a knob operating board for the thumb-turn appears. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a security cover for a thumb turn of a lock of a door (opening door, sliding door, etc.).
[0002]
[Prior art]
Conventionally, a lock operating tool attached to an inner sliding door has, for example, a case-like mounting frame and a knob that is slidably mounted in the mounting frame so as to be vertically slidable and protrudes from a vertical guide slot of the mounting frame. And a knob operating plate ("thumb turn operating plate") for operating a locking piece (for example, a sickle piece) of a sliding door lock provided on an inner sliding door in a locking or unlocking direction. A drive shaft and the like were provided.
[0003]
In the above configuration, if the inside and outside sliding doors are locked via scythes, and if a thief tries to unlock the sliding doors' scythes illegally, unlock the holes using a drill. There is an example of opening, but for example, a hard bar is inserted into the joint surface of the overlapped inner and outer frames, forcing a gap.
[0004]
Then, a hook-shaped wire member (one of the tools of a thief) having a tip portion is inserted through a gap, and is attempted to be hooked on a knob portion of a knob operation plate constituting a sliding door lock. In such a case, when the tip of the wire member is caught on the knob, the thief lifts the knob operation plate well through the knob. Then, the scythe retreats through the sliding of the picking operation plate and the movement of the interlocking member.
[0005]
Therefore, the sliding door lock in which the sickle piece is unlocked by simply lifting or pushing down the knob operating plate has a problem that the probability of unauthorized unlocking is high. As a prior art document that solves such a problem, there is JP-A-2003-56218.
[0006]
[Problems to be solved by the invention]
A first object of the present invention is to prevent a burglar from opening a hole in a door or operating a picking operation plate using a wire member or the like from a gap in the door to put a sickle in a lock in an unlocked state. It is to provide a security cover device. A second object is that the thumb-turn cover of the security cover device does not easily move upward unless the thumb-turn cover is opened with two or more fingers. A third object is that, when the thumb-turn cover of the security cover is lifted to a required position, the thumb-turn cover remains open even if the finger is released from the thumb-turn cover. A fourth object is that while the thumb-turn cover can be easily attached to the guide support member, once the thumb-turn cover has been attached to the guide support member, the cover cannot be easily removed. A fifth object is to be able to cover a vertically long thumb turn in which the knob moves vertically.
[0007]
[Means for Solving the Problems]
The security cover device for a thumb-turn according to the present invention is fixed to an inner wall surface of a door so as to surround the thumb-turn, and has a first engaged portion on left and right side frame portions; A thumb-turn cover that has an engaging portion that engages with the first engaged portion, and that, when lifted up with a finger and slid upward, a knob portion of the thumb-operating knob operating plate appears. .
[0008]
BEST MODE FOR CARRYING OUT THE INVENTION
1 to 13 are explanatory diagrams showing an embodiment of the present invention. Reference numeral 1 denotes a thumb-turn security cover for locking a door (opening / closing door, sliding door, etc.) (hereinafter simply referred to as “security cover”).
[0009]
The security cover device 1 is fixedly attached to the inner wall surface (for example, a vertical frame) 2a of the inner sliding door 2 as shown in FIG. Although the configuration of a sliding door lock as an example of a lock is not particularly shown, it generally has a locking piece (sickle piece) provided in a vertical frame of the inner sliding door 2 and supported by an interlocking member. The locking piece is engaged with a receiving fitting provided on the outside sliding door of the other party. In the present embodiment, since the sliding door lock itself is not a specific requirement of the invention, a detailed description is omitted.
[0010]
Reference numeral 3 denotes a thumb turn for moving the locking piece of the lock in the locking or unlocking direction. This thumb turn 3 is also attached to the inner wall surface (for example, a vertical frame) 2 a of the sliding door 2 via a fixing tool 4. When the components of the thumb turn 3 are roughly divided, a knob body having an arbitrary shape and a knob portion 6a which is slidably housed in the case body 5 and protrudes from a guide window 5a of the case body 5 is provided. It is composed of a plate 6 and a locking piece interlocked with the knob operation plate 6.
[0011]
Therefore, the configuration of the security cover 1 of the present invention will be described. As shown in FIG. 2, the security cover 1 is fixed to the inner wall surface 2 a of the door 2 so as to surround a part or the whole of the thumb turn 3 (in this embodiment, the entire case body 5). A guide support member 7 having a first engaged portion 8, 8 on a frame portion, and small projection-shaped engaging portions 9a, 9b engaged with the first engaged portions 8, 8 of the guide support member 7. And a transparent or translucent thumb-turn cover 10 in which a knob 6a of the thumb-operating plate 6 of the thumb-turn 3 appears when the finger is lifted and slid upward.
[0012]
First, the guide support member 7 will be described. The guide support member 7 has a case-shaped support portion 11 that covers the lower end portion 3a of the vertically long thumb turn 3, and left and right side frame portions 12a, 12a respectively connected to left and right side walls 11a, 11a of the support portion 11. And a frame-shaped guide support portion 12.
[0013]
The guide support portion 12 does not need to have the upper frame portion 12b having the L-shaped end surface, but in the present embodiment, the guide support portion 12 is made tough, and is firmly attached to the inner wall surface 2a of the sliding door 2 via the upper frame portion 12b. For example, the upper frame portion 12b is formed in an L-shaped end face or an L-shaped cross section. Therefore, reinforcing ribs parallel to the upper frame portion 12b may be provided above the left and right side frame portions 12a of the guide support portion 12.
[0014]
However, the lower case-shaped support portion 11 does not have an upper wall and a rear wall (rear wall). Second engaged portions (small holes, small grooves, etc.) 13, 13 are formed at the upper end portions of the left and right side walls 11a, 11a of the support portion 11. The left and right side walls 11a, 11a are formed thick except for the upper end portion so as to be strong.
[0015]
On the other hand, the left and right side frame portions 12a of the guide support portion 12 correspond to a pair of left and right side wall portions formed in a column shape. In the present embodiment, the vertical grooves 8 as the above-described first engaged portions are formed on the outer wall surfaces of the left and right frame portions 12a, 12a.
[0016]
Reference numeral 14 denotes a pair of left and right cutouts formed at the upper end portions of the left and right side frame portions 12a, 12a. These cutouts 14, 14 communicate with the vertical grooves 8, 8, respectively. These notches 14 have a width through which the left and right small projection engagement portions 9 of the thumb turn cover 10 pass.
[0017]
By the way, support protrusions 15 are formed at the upper positions in the vertical grooves 8, 8 and project outwardly in the shape of a mountain or a semicircular arc (in this embodiment, a mountain in cross section). As shown in FIG. 11, these support protrusions 15 have a lower inclined surface 15a and an upper supported inclined surface 15b.
[0018]
Next, the thumb turn cover 10 will be described. The thumb-turn cover 10 is formed in a case shape as shown in FIG. 1, but does not have a rear wall (rear wall) and a lower wall, as is apparent from a schematic longitudinal section of FIG. Therefore, if reference numerals are given to the respective walls, 10a is a front wall, 10b and 10b are left and right side walls, and 10c is an upper wall.
[0019]
The lower end portions of the left and right side walls 10b, 10b exactly fit on the stepped upper end support surface 16 because the upper end portion of the support portion 11 of the guide support member 7 is formed in a stepped shape. As shown in FIG.
[0020]
Further, a pair of left and right engaging claw pieces 20, 20 simultaneously engaging and disengaging with the second engaged portions 13, 13 of the guide support member 7, respectively, are formed on the lower end edges of the left and right side walls 10 b, 10 b in a tongue shape. It is protruding. The lower ends of the engaging claw pieces 20, 20 or the left and right side walls 10b, 10b have an elastic return deformation function due to the material itself.
[0021]
Further, in the present embodiment, a plurality of (for example, a total of four) slidingly engaging the first engaged portions (vertical grooves) 8 of the guide support member 7 on the inner wall surfaces at the lower end portions of the left and right side walls 10b and 10b, respectively. ) Are formed in the shape of small projections. These small projecting engagement portions 9a, 9b are vertically spaced apart from each other by a required distance, and can enter the vertical grooves 8, 8 from the cutouts 14, 14 of the guide support member 7. It is.
[0022]
In the above configuration, FIGS. 2 to 5 are schematic explanatory views showing a state in which the thumb turn cover 10 is closed. At this time, the engaging claw pieces 20 of the thumb turn cover 10 are engaged with the second engaged portions 13 of the guide support member 7, and the lower end surface of the thumb turn cover 10 is formed on the support portion 11 of the guide member 7. Even if a thief tries to open the thumb turn cover 10 by inserting a wire member through a gap between the doors 2, for example, the thief fits the upper end support surface 16 so that the hook-shaped tip of the wire member has Do not get caught on etc.
[0023]
Therefore, the thumb turn cover 10 cannot be opened. Even if a thief operates the tool from outside the door to open the thumb-turn cover 10, it only hits the side wall 11a, the bottom wall 11b, the front wall 11c, etc. of the support portion 11 of the guide support member 7.
[0024]
On the other hand, when the resident attempts to open the thumb-turn cover 10, as shown in FIG. 9, the left and right side walls 10b, 10b of the thumb-turn cover 10 are pinched and pressed by two or more fingers.
[0025]
Then, the lower end portions of the left and right side walls 10b, 10b are slightly displaced inward because they have an elastic return deformation function as shown in FIG. It comes off from the joints 13,13. Therefore, when the thumb turn cover 10 is lifted as it is, the thumb turn cover 10 slides in the vertical groove 8 of the guide support member 7 via the plurality of engaging portions 9.
[0026]
As shown in FIG. 9, the thumb-turn cover is lifted by fingers, and as shown in FIG. 10, the upper engaging portion 9 a of the thumb-turn cover 10 is guided and supported at or after the knob 6 a of the thumb-turn 3 completely appears. The member 7 gets over the lower inclined surface 15a of the support protrusion 15 of the member 7.
[0027]
Then, as shown in FIG. 11, the upper engaging portion 9a of the thumb turn cover 10 rides on the upper inclined support surface 15b of the support projection 15, so that the thumb turn cover does not fall naturally.
[0028]
When the thumb turn cover 10 is closed, when the upper wall 10c of the thumb turn cover 10 is pushed down, the state is reversed from that in FIG. 11, so that the thumb turn cover 10 slides straight down and the engaging claw pieces 20, 20 of the thumb turn cover 10 are guided and supported. The member 7 is simultaneously engaged with the second engaged portion 13. In this case, the engaging claw pieces 20 are engaged with the second engaged portion 13 after being displaced inward.
[0029]
FIGS. 12 and 13 are explanatory diagrams of a case where the thumb turn cover 10 is fitted into the guide support member 7. In the present embodiment, a pair of left and right cutouts 14 is formed at the upper end of the guide support member 7, and from there, first, the lower engaging portion 9b of the thumb turn cover 10 is inserted into the vertical grooves 8,8. Then, the upper engaging portion 9a is fitted into the vertical grooves 8,8. Then, the thumb turn cover 10 and the guide support member 7 form one security cover device 1.
[0030]
When the security cover device 1 is fixed to the inner wall surface 2a of the door 2, the thumb-turn cover 10 cannot be tilted toward the inner wall surface 2a as shown in FIG. When fixed to the wall surface 2a, the thumb turn cover 10 cannot be removed from the guide support member 7 so easily.
[0031]
【Example】
Since the lower ends of the left and right side walls 10b, 10b of the thumb turn cover 10 are better to have an elastic deformation function and an elastic return function, the thumb turn cover 10 is formed of a synthetic resin material. The pair of left and right engaging claw pieces 20, 20 that respectively simultaneously engage and disengage with the second engaged portions 13, 13 of the guide support member 7 may be one. Further, the shape and location of the engaging claw pieces 20 can be arbitrarily changed in design. The form of the thumb turn cover 10 is not particularly limited.
[0032]
Further, as shown in FIG. 14, when the lower ends of the left and right side walls 10a, 10a of the thumb turn cover 10A are pinched and pressed by a finger, the lower ends (particularly, the edges) are easily displaced inward. A total of two slits (slits) 25, 25 may be formed as appropriate. In this thumb turn cover 10A, short vertical slits 25, 25 are formed at the lower end portion corresponding to or near the boundary between the front wall 10a and the left and right side walls 10b, 10b of the thumb turn cover 10A.
[0033]
【The invention's effect】
As is apparent from the above description, the present invention has the following effects.
(1) It does not easily move upward unless the thumb-turn cover of the security cover is opened with two or more fingers. Therefore, the first object of the invention can be sufficiently achieved.
(2) A vertically long thumb turn in which the knob moves in the vertical direction can also be covered.
(3) When the thumb-turn cover of the security cover is lifted to a required position, the thumb-turn cover remains open even if the finger is released from the thumb-turn cover.
(4) Although the thumb turn cover can be easily attached to the guide support member, once the thumb turn cover is attached to the guide support member, the cover cannot be easily removed.
[Brief description of the drawings]
1 to 13 are explanatory views showing one embodiment of the present invention. FIG. 14 is a perspective view showing another embodiment of the thumb turn cover.
FIG. 1 is an exploded perspective view showing an example of an embodiment.
FIG. 2 is a perspective view (thumb turn covers are imaginary lines).
FIG. 3 is a front view when fixed to the inner wall surface of the door.
FIG. 4 is an explanatory view from the right side based on FIG. 3 (thumb turn covers are imaginary lines).
FIG. 5 is a schematic sectional view (partially cut away) taken along line 5-5 in FIG. 3;
FIG. 6 is a schematic sectional explanatory view based on line 6-6 in FIG. 3;
FIG. 7 is a schematic sectional explanatory view based on the line 7-7 in FIG. 3;
FIG. 8 is an explanatory diagram of a main part (a cutout part).
FIG. 9 is an explanatory diagram when the thumb turn cover is picked up with a finger and opened.
FIG. 10 is an explanatory diagram when the thumb turn cover is lifted as it is.
FIG. 11 is a schematic explanatory view when the thumb turn cover is supported so as not to fall.
FIG. 12 is an explanatory diagram when a lower engaging portion of a thumb turn cover is fitted into a guide support member.
FIG. 13 is an explanatory diagram when the upper engaging portion of the thumb turn cover is fitted into the guide support member.
FIG. 14 is a perspective view showing another embodiment of the thumb turn cover.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Security cover device, 2 ... Door, 2a ... Inner wall surface, 3 ... Thumb turn, 3a ... Lower end portion, 5 ... Case main body, 6 ... Knob operation plate, 6a ... Knob portion, 7 ... Guide support member, 8 ... First Engaged parts, 9a, 9b: Engagement parts, 10, 10A: Thumb turn cover, 10a: Front wall of cover, 10b: Right and left side walls of cover, 11: Case-shaped support part, 11a: Left and right side walls of support part, 12 ... frame-shaped guide support portion, 12a ... left and right side frame portions of the guide support portion, 12b ... upper frame portion, 13 ... second engaged portion, 14 ... cutout portion, 15 ... support protrusion, 15a ... lower inclined surface, 15b: Upper support inclined surface, 16: Upper end support surface of the support portion, 20: Engagement claw piece, 25: Slit.

Claims (8)

A guide support member fixed to the inner wall surface of the door so as to surround the thumb turn, and having a first engaged portion on left and right side frame portions, and engaging with the first engaged portion of the guide support member A thumb-turn security cover device comprising: a thumb-turn cover having an engaging portion, and a thumb-turn portion of the thumb-turning operation plate when the finger is lifted up and slid upward. In claim 1, the guide support member 7 includes a case-like support portion 11 that covers the lower end portion of the vertically long thumb turn 3, and a guide support portion 12 in which left and right side frame portions 12a are respectively connected to the support portion. A security cover for a thumb lock of a lock, comprising: In the first or second aspect, at least one engaging claw piece 20 is provided at a lower end edge of the thumb turn cover to be engaged with and disengaged from the second engaged portion 13 formed on the support portion of the guide support member. A security cover for a thumb lock of a lock. 2. The first engaging portion 8 of the guide support member is a vertical groove, while the engaging portion 9 of the thumb turn cover is a plurality of small projections engaging with the vertical groove. A security cover for a thumb lock with a lock. 2. The security cover for a thumb lock according to claim 1, wherein an upper end support surface of the case-like support portion of the guide support member and an end surface of a lower end portion of the thumb turn cover are fitted to each other. In claim 1 or claim 4, after the thumb-turn cover is lifted and the knob of the operation piece of the thumb-turn completely appears, the thumb-turn cover is located at an upper position in the vertical groove of the guide support member so as not to drop naturally. A thumb-turn security cover device for a lock, wherein a support projection is provided in which an engagement portion of the thumb-turn cover slides. In the first or fifth aspect, the notch portions 14, 14 communicating with the first engaged portion are formed at upper end portions of the left and right side frame portions 12a, 12a of the guide support member. A security cover for a thumb lock. The security cover for a thumb lock according to claim 1, wherein a plurality of slits (25) are formed at lower ends of left and right side walls (10a, 10a) of the thumb turn cover (10A).

Images