JP3672113B2 - Mounting device for strike plate for guard arm - Google Patents

Description

[0001]
[Industrial application fields]
The present invention relates to an apparatus for attaching a strike plate in a guard arm device (guard) installed between a door and a door frame or another door facing the double door.
[0002]
[Prior art]
A guard arm device in which the door opening angle is limited to a half-open state by a guard arm so that a visitor can be confirmed and handled safely is disclosed in, for example, Japanese Utility Model Publication No. 2-105472.
[0003]
The conventional guard arm device as disclosed in the publication discloses a fitting hole and a continuous connection with the fitting hole for selectively engaging and guiding the engaging projection at the tip of the guard arm attached to the free side edge of the door. The strike plate having the guide long hole is usually attached to the facing surface of the door frame or the other facing door with a mounting screw.
[0004]
[Problems to be solved by the invention]
Therefore, in the guard arm device as described above, the strike plate is exposed to the outside when the door is half-opened when the guard arm is activated. Can be unscrewed.
[0005]
Therefore, the strike plate is removed from the door frame or another door, the guard arm operation state is released, and a malicious third party is allowed to enter.
[0006]
The present invention proposes a strike plate mounting device that solves the above-mentioned crime prevention problems and prevents the strike plate from being removed from the door frame or other doors even when the strike plate is exposed to the outside during the guard arm operation. The purpose is to do.
[0007]
[Means for Solving the Problems]
In order to achieve the above object, the guard arm strike plate mounting device according to the first aspect of the present invention selectively engages the engagement protrusion at the tip of the guard arm attached to the free side edge of the door. In a strike plate that has a fitting hole and a guide elongated hole that is continuous with the fitting hole, and is attached to the facing surface of the door frame or another facing door; one on the side where the fitting hole exists in the vertical direction of the strike plate The restraint pin is fixed to the rear surface of the end face backward; the length of the restraint pin is longer than the depth of the maximum protrusion on the back surface side of the strike plate, and the portion of the tip of the restraint pin that exceeds the maximum protrusion Having a male thread part larger than the diameter of the pin body part; when the strike plate is mounted, the male thread part of the restraining pin is screwed into the female thread hole for the pin formed on the opposite surface of the door frame or other door; Pierce backward It is shall; and, a configuration condition to be secured to the opposing surface of the door frame or other door both ends in the vertical direction of the strike plate in each mounting screws.
[0008]
According to a second aspect of the present invention, there is provided a guard arm strike plate mounting device that selectively engages and guides the engagement protrusions at the tip of the guard arm attached to the free side edge of the door. Strike plate which has a guide long hole provided continuously to it and is attached to the facing surface of the door frame or another facing door; a restraining pin on the back surface of one end of the strike plate in the vertical direction Fixing backwards; the length of the restraining pin is at least longer than the plate thickness of the facing surface of the door frame or other facing door, and has a male threaded portion with a diameter larger than the diameter of the pin body at the tip. When the strike plate is mounted, the male screw portion of the restraining pin is screwed into the female screw hole for the pin formed on the door frame or the opposite surface of the other door and then penetrates backward; and the strike plate Up and down The both end portions and structure condition to be secured to the opposing surface of the door frame or other doors in each mounting screws.
[0009]
[Action]
A procedure for attaching the strike plate 3 according to the first aspect of the invention to the door frame 10 or another door (hereinafter referred to as “door frame”) will be described with reference to FIG. 3.
[0010]
First, the strike plate 3 is grasped by hand, the male screw portion 52 of the restraining pin 5 projecting on the back surface thereof is screwed into the pin female screw hole 40 of the door frame 10, the entire strike plate 3 is rotated several times, and the male screw is obtained. The portion 52 is pushed backward from the female female screw hole 40.
[0011]
At this time, the pin main body 51 of the restraining pin 5 is in a state of being slightly loosely inserted into the female female screw hole 40.
[0012]
Therefore, the strike plate 3 is pressed against the door frame 10, and both ends in the vertical direction (length direction) are fixed to the facing surface of the door frame 10 with mounting screws 4, 4 as shown in FIGS. 1 and 2.
[0013]
Next, a case where a malicious third party tries to destroy the guard arm device in the guard arm operating state will be described with reference to FIGS.
[0014]
Even if the door is opened in a half-open state and the mounting screws 4 and 4 of the strike plate 3 exposed to the outside are removed with a screwdriver, the strike plate 3 is engaged with the guard arm 1 engaged in the guide slot 32. Due to the presence of the restraining pin 5 of the strike plate 3 inserted into the pin projection male screw hole 40 of the mating protrusion 2 and the door frame 10, the rotation with respect to the axis of the restraining pin 5 and the separation from the facing surface of the door frame 10. Since the movement in the direction of movement is limited within a certain range, it is impossible to completely remove the strike plate 3 from the door frame 10.
[0015]
In other words, the range of swinging (turning) of the strike plate 3 is limited by the length of the guard arm 1, and when the strike plate 3 is removed in the horizontal direction, the male screw portion 51 of the restraining pin 5 is used by the door frame. It is limited by coming into contact with the peripheral portion of the ten pin male screw holes 40.
[0016]
The invention according to the second aspect is applied to the case where the trolley 35 is not coupled to the back side of the strike plate 3 and the bent piece 33 is not formed. First, only the troyoke 35 is fitted into the door frame 10, and the male threaded portion 52 of the short restraining pin 5 is later screwed into the female female screw hole 40 in the same manner as described above.
[0017]
At this time, it is needless to say that a so-called fool hole that loosely fits with the male screw portion should be formed in a portion of the flange portion of the troyoke 35 that interferes with the restraining pin 5.
[0018]
Next, the strike plate 3 is fixed to the door frame 10 with the mounting screws 4 and 4. Since the effect of the strike plate 3 in this case is the same as that of the invention described in claim 1, further detailed description is omitted.
[0019]
【Example】
Hereinafter, the present invention will be described based on embodiments shown in the drawings.
1 to 3 showing an embodiment of the invention described in claim 1, reference numeral 1 denotes a guard arm whose base end is movably attached to a door (not shown). An engaging projection 2 comprising:
[0020]
In many cases, the guard arm 1 is provided alongside the main lock, and in this case, the guard arm 1 is usually protruded from the front plate by a thumb turn. However, the guard arm device (guard lock) can also be provided independently of the main lock.
[0021]
The strike plate 3 that selectively engages and guides the engagement protrusion 2 of the guard arm 1 has a fitting hole 31 and a guide elongated hole 32 that is continuous with the fitting hole 31, and the door frame 10 or other opposing doors of the double door. It is attached to the opposing surface with mounting screws 4 and 4 described later.
[0022]
Reference numeral 33 denotes a bent piece for guiding the engaging protrusion 2 to the normal position when the engaging protrusion 2 of the guard arm 1 is removed from the fitting hole 31 of the strike plate 3, and 34 is a book attached to the guard arm device. A dead bolt engaging hole 35 in the locking lock is provided on the rear surface of the strike plate 3 by welding or caulking, etc., and is provided in the flange-like mounting portion, and 20 is provided in the door frame 10 for fitting the trotting 35. Openings 30 are female screw holes provided in the door 10 for screwing the mounting screws 4 respectively.
[0023]
Next, the restraining pin 5 which is a main part of the present invention will be described.
The restraining pin 5 is composed of a pin body portion 51 on the proximal end side with a small diameter and a male screw portion 51 on the distal end side with a large diameter, and the proximal end has a fitting hole 31 in the vertical direction (length direction) of the strike plate 3. It is fixed directly or indirectly by caulking or welding on the back surface of one end of the side.
[0024]
In the illustrated example, the restraining pin 5 is indirectly fixed to the back surface of the strike plate 3 via a flange-shaped mounting portion of the troyoke 35 and protrudes rearward. It should be noted that the Troyoke 35 is not an essential component in the present invention.
[0025]
And the length of the said restraint pin 5 is longer than the depth of the largest protrusion other than, for example, Troyoke 35 in the back surface side of the strike board 3, The restraint pin 5 exceeded the said largest protrusion of the restraint pin front-end | tip part. The part has a male screw part 52 having a diameter larger than that of the pin main body part 51.
[0026]
When the strike plate 3 is mounted on the door frame 10 or another door, the male screw portion 52 of the restraining pin 5 is screwed into a female screw hole 40 for a pin formed in advance on the facing surface of the door frame 10 or another door. After that, let it penetrate backwards.
[0027]
As shown in FIG. 3, when the male threaded portion 52 of the restraining pin 5 penetrates the pin female threaded hole 40 rearward through the door frame 10 or the opposite surface of the other door, the strike plate 3 is pressed into a predetermined position and the strike plate 3. Are fixed to the facing surface of the door frame 10 or another door with an arbitrary number of mounting screws 4, 4.
[0028]
At this time, it goes without saying that each mounting screw 4 is screwed into the facing female screw hole 30 of the door frame 10 or another door.
[0029]
Thus, the strike plate 3 is not necessarily integrally coupled to the troyoke 35, and may be separately attached to the door frame 10, or the strike plate is directly attached to the door frame without providing the troyoke. In some cases.
[0030]
Further, the strike plate 33 may be formed as a three flat plate without providing the bent piece 33 (see FIGS. 1 and 3) on the back surface of the strike plate 3.
[0031]
In such a case, since there is no protrusion on the back surface side of the strike plate in the invention described in claim 1, the length of the restraining pin 5 can be shortened as shown in FIG.
[0032]
In this case, the length of the main body portion 51 of the restraining pin may be set slightly longer than the sum of the thickness of the mounting surface of the door frame 10 and the thickness of the flange portion of the trolley 35.
[0033]
【The invention's effect】
According to the strike plate mounting device for a guard arm of the present invention described above, even if the mounting screw of the strike plate is removed by a malicious third party when the guard arm is operated, the strike plate and its related configuration Since it is impossible to separate the door from the door frame or the other door of the opening door, it is extremely effective for crime prevention.
[Brief description of the drawings]
FIG. 1 is a front view of a guard arm strike plate mounting device according to an embodiment of the present invention;
FIG. 2 is a partial longitudinal side view thereof.
FIG. 3 is a partially longitudinal side view of the mounting process.
FIG. 4 is a partially longitudinal side view showing a guard arm strike plate mounting device according to an embodiment of the present invention as set forth in FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Guard arm 2 Engagement protrusion 3 Strike board 4 Mounting screw 5 Restraint pin 51 Main part 52 Male screw part 10 Door frame 20 Opening 30 Female screw hole 31 Fit hole 32 Guide long hole 40 Female screw hole for pin

Claims (2)

In order to selectively engage and guide the engagement protrusion at the tip of the guard arm attached to the free side edge of the door, it has a fitting hole and a guide long hole provided continuously therewith. Strike plate attached to the opposite surface; Fixing a restraining pin rearward on the back of one end of the strike plate in the vertical direction; the length of the restraint pin is on the back side of the strike plate It has a male thread part longer than the maximum protrusion and larger than the diameter of the pin body part at the part of the tip of the restraint pin that exceeds the maximum protrusion; when the strike plate is mounted, the male thread part of the restraint pin is After being screwed into the female screw hole for pins formed on the door frame or the opposite surface of the other door, it should penetrate through the rear; and both ends in the vertical direction of the strike plate are door screws or other The door Gadoa the structure condition to be secured to the facing surfaces - mounting device arm for strike plate. In order to selectively engage and guide the engagement protrusion at the tip of the guard arm attached to the free side edge of the door, it has a fitting hole and a guide long hole provided continuously therewith. Strike plate attached to the opposing surface; Fixing a restraining pin rearward on the back surface of one end of the strike plate in the vertical direction; the length of the restraining pin is at least facing the door frame It has a male threaded part that is longer than the thickness of the opposing surface of the other door and larger than the diameter of the pin body at the tip; when the strike plate is installed, the male threaded part of the restraining pin is the door frame or other door And the both ends of the strike plate in the vertical direction are respectively attached to the door frame or the other door facing surface with a mounting screw. It can be fixed Mounting device for a continuously for Strike plate - Gadoa to conditions.

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