Auxiliary locking device

Abstract

To provide an auxiliary locking device that allows a door latch plate, which is temporarily held in place by magnetically adhering to a metal surface such as a metal door panel, to be easily detached with minimal force.SOLUTION: An auxiliary locking device 1 enables a door locking plate 4 to magnetically adhere to a metal surface by contacting the door locking plate 4 with a swing door D during locking. Furthermore, it ensures that a gap is formed between an outer peripheral surface 45 of the magnetically adhered door locking plate 4 and the metal surface.SELECTED DRAWING: Figure 4

Description

[Technical Field]

[0001] The present invention relates to an auxiliary locking device that is used as a retrofit for an outward-opening or inward-opening hinged door (door) of, for example, a detached house or an apartment building. [Background technology]

[0002] In recent years, auxiliary locking devices that can be retrofitted onto outward-opening or inward-opening doors of detached houses, apartment buildings, etc. have been proposed and put into practical use as a countermeasure against theft by lock picking and against elderly people wandering around (see, for example, Patent Documents 1 to 3).

[0003] As shown in Figures 1 and 2, this auxiliary locking device 1 has a locking member holding piece 2 that protrudes in the opening direction of an outward-opening or inward-opening hinged door D, attached to a door frame F via an attachment portion 3, and when the hinged door D is closed, a door locking piece 4 having a through hole 41 formed therein for insertion into the locking member holding piece 2 and a locking member 5 having a shackle 51 that engages with a hole portion 21 formed at the tip of the locking member holding piece 2 are attached in this order, and the door locking piece 4 abuts against the hinged door D to lock it.

[0004] Furthermore, in the auxiliary locking devices of Patent Documents 2 and 3, a magnetic member such as a rubber magnet sheet is provided on the door locking piece, so that the door locking piece can be magnetically attached to a metal surface.This allows the door locking piece to be temporarily placed by magnetically attaching it to a metal surface such as a metal door surface when the auxiliary locking device is not in use (unlocked). [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Application Laid-Open No. 2014-217736 [Patent Document 2] Japanese Patent Application Publication No. 2020-186610 [Patent Document 3] Utility Model Registration No. 3181192 Summary of the Invention [Problem to be solved by the invention]

[0006] However, in the above-mentioned conventional auxiliary locking device, the door locking piece, which is temporarily placed by being magnetically attached to a metal surface such as a metal door surface, adheres closely to the metal surface, and therefore, in the case of a plate-shaped door locking piece in particular, it requires force to remove it from the metal surface such as a metal door surface, and there was a problem that it could not be easily removed.

[0007] In view of the problems inherent in the door locking pieces of the above-mentioned conventional auxiliary locking devices, which are temporarily placed by being magnetically attached to a metal surface such as a metal door surface, the present invention aims to provide an auxiliary locking device that allows door locking pieces, which are temporarily placed by being magnetically attached to a metal surface such as a metal door surface, to be easily detached with little force. [Means for solving the problem]

[0008] In order to achieve the above-mentioned object, the auxiliary locking device of the present invention is an auxiliary locking device in which a locking member holding piece that protrudes in the opening direction of a hinged door is attached to the door frame via an attachment part, and when the hinged door is closed, a door locking piece and a locking member are attached in that order to the tip side of the locking member holding piece, and the door locking piece abuts against the hinged door to lock it, and is characterized in that the door locking piece can be magnetically attached to a metal surface, and a gap is formed between the outer peripheral surface of the magnetically attached door locking piece and the metal surface.

[0009] In this case, the gap can be made to gradually widen toward the outer periphery of the magnetically attached surface of the door locking piece. [Effects of the Invention]

[0010] According to the auxiliary locking device of the present invention, the door locking piece can be magnetically attached to a metal surface, and a gap is formed between the outer peripheral surface of the magnetically attached door locking piece and the metal surface, so that the door locking piece that is temporarily placed by being magnetically attached to a metal surface such as a metal door surface can be easily detached with a small force. [Brief explanation of the drawings]

[0011] [Figure 1] FIG. 1 is a perspective view showing an example of a conventional auxiliary locking device. [Figure 2] FIG. 4 is an explanatory diagram of the auxiliary locking device when locked. [Figure 3] An explanatory diagram of the door locking piece of the auxiliary locking device of the present invention (rubber magnet sheet not attached), (a) is a front view, (b) is a plan view, (c) is a bottom view, (d) is a right side view, and (e) is a rear view. [Figure 4] 1A is a front view of the door locking piece, FIG. 1B is a plan view, FIG. 1C is a bottom view, FIG. 1D is a right side view, and FIG. 1E is a rear view. [Figure 5] 10A and 10B are explanatory views of the door locking piece, in which (a) is a perspective view seen from the front side, and (b) is a perspective view seen from the rear side. DETAILED DESCRIPTION OF THE INVENTION

[0012] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of an auxiliary locking device according to the present invention will now be described with reference to the accompanying drawings.

[0013] The auxiliary locking device 1 of the present invention, like the auxiliary locking device 1 shown in Figures 1 and 2, has a locking member holding piece 2 that protrudes in the opening direction of an outward-opening or inward-opening hinged door D and is attached to a door frame F via an attachment part 3, and when the hinged door D is closed, a door locking piece 4 and a locking member 5 are attached in that order to the tip side of the locking member holding piece 2, and the door locking piece 4 abuts against the hinged door D to lock it.As shown in Figures 3 to 5, the door locking piece 4 can be magnetically attached to a metal surface such as a metal door surface, and a gap is formed between the outer peripheral surface 45 of the magnetic surface of the door locking piece 4 magnetically attached to the metal surface such as a metal door surface (the outer peripheral surface excluding the magnetic surface at the center of the back surface of the door locking piece 4) and the metal surface. Here, the door locking piece 4 and the locking member 5 are configured as separate members, but the two members may also be configured as an integral unit.

[0014] The door locking piece 4 can be made of metal such as stainless steel or resin, but in this embodiment it is made of ABS resin, which has excellent rigidity and impact resistance.

[0015] The door locking piece 4 has a through hole 41 formed therein through which the locking member holding piece 2 is inserted, and the outer periphery of the through hole 41 is surrounded by a thick portion 42 .

[0016] The back surface of the door locking piece 4 has ribs that are spaced apart to reduce weight, and a rectangular flat section 43 is formed in the center. A magnetic member 44 such as a rubber magnet sheet is provided so that the door locking piece 4 can be magnetically attached to a metal surface. This allows the door locking piece 4 to be temporarily placed by magnetically attaching it to a metal surface such as a metal door surface when the auxiliary locking device 1 is not in use (unlocked). Furthermore, the outer peripheral surface 45 around the flat portion 43 on the back surface of the door locking piece 4 is made up of an inclined surface, so that when the door locking piece 4 is magnetically attached to a metal surface such as a metal door surface, a gap is formed between the outer peripheral surface 45 of the magnetic surface of the door locking piece 4 magnetically attached to the metal surface such as a metal door surface and the metal surface, and this gap gradually widens towards the outer peripheral side of the magnetic surface of the door locking piece 4. Here, the size of the gap should be set to about 2 to 5 mm at the outer periphery of the door locking piece 4. is preferred.

[0017] According to this auxiliary locking device 1, the door locking piece 4 can be magnetically attached to a metal surface, and a gap is formed between the outer peripheral surface 45 of the magnetically attached door locking piece 4 and the metal surface. As a result, when removing the door locking piece 4 that has been temporarily placed by being magnetically attached to a metal surface such as a metal door surface, the door locking piece 4 can be easily removed with little force by hooking a fingertip into the gap or by pressing one end of the outer periphery of the door locking piece 4 and lifting the other end.

[0018] The above describes the auxiliary locking device of the present invention based on its embodiments, but the present invention is not limited to the configuration described in the above embodiments, and the configuration can be changed as appropriate within the scope of the spirit of the present invention. [Industrial Applicability]

[0019] The auxiliary locking device of the present invention allows door locking pieces that are temporarily placed by being magnetically attached to a metal surface such as a metal door surface to be easily detached with a small force, and therefore can be widely used as an auxiliary locking device that is retrofitted to outward-opening or inward-opening doors. [Explanation of symbols]

[0020] D Swing door F door frame 1 Auxiliary locking device 2 Locking member retaining piece 21 Hole 3 Mounting part 4 Door locking piece 41 Through hole 42 Thick wall part 43 Flat area 44 Magnet components 45 Outer surface 5 Locking member 51 Shackle

Claims

1. This auxiliary locking device has a locking member holding piece that protrudes in the opening direction of the hinged door and is attached to the door frame via an attachment part, and when the hinged door is closed, a door locking piece and a locking member are attached in that order to the tip of the locking member holding piece, and the door locking piece abuts against the hinged door to lock it.The auxiliary locking device is characterized in that the door locking piece can be magnetically attached to a metal surface, and a gap is formed between the outer peripheral surface of the magnetically attached door locking piece and the metal surface.

2. 2. The auxiliary locking device according to claim 1, wherein the gap gradually widens toward the outer periphery of the magnetically attached surface of the door locking piece.

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