JP6745960B2 - Door guard with lock function - Google Patents

Description

The present invention relates to a door guard that restricts an opening degree of a door within a certain range to prevent a suspicious person from entering and has a lock function capable of auxiliary door closing.

Generally, a door guard is composed of an arm member attached to the door side to be opened and closed, and a receiver attached to the fixed side of the door. The arm member is provided with a retractable arm, and the receiver is attached from the fixed side. A projecting shaft is provided.

Then, when the door is closed, the arm is erected, the receiving shaft is inserted into the inserting/removing hole of the arm, and when the door is opened, the head of the receiving shaft engages with the slide hole, and the receiving shaft moves. It slides relatively along the slide hole, contacts the closed end of the slide hole, and becomes a caution state in which the opening degree of the door is limited to a certain range. Further, when the arm falls down along the inner surface of the door and the arm and the receiving shaft are not engaged with each other, the door can be freely opened and closed.

Further, in Patent Document 1 below, for the purpose of obtaining a wind-collecting effect by holding a door at a constant opening and for the purpose of complementing a main lock such as a cylinder lock, as shown in FIG. In a door guard including a tool 52 and an arm 53 and a receiving shaft 54, a plate-shaped opening/closing restricting member 56 that rotates independently of each other around a rotation shaft 55 that is the same as the arm 53 is provided on the arm member 51. It is described that the opening/closing restricting member 56 is provided with an engaging concave portion 57 at the leading edge and engaging holes 58 and 59 are formed at the intermediate portion and the proximal end portion, respectively.

In this door guard, as shown in FIG. 7(a), in the precautionary state, the opening/closing restriction member 56 is erected and overlapped with the arm 53, and the door is half-opened so that the opening/closing restriction member 56 has an engaging recess 57 or an intermediate portion at the tip thereof. When the receiving shaft 54 is engaged with the engaging hole 58, the door is held at a constant opening degree, and the wind collecting effect can be obtained.

Further, as shown in FIG. 7B, when the receiving shaft 54 is engaged with the engagement hole 59 at the base end portion of the opening/closing restriction member 56 with the door closed, a person who attempts to enter from the outdoor side Even if you pull the door, it will be locked so that you cannot open it.

Further, as shown in FIG. 7C, when the opening/closing restriction member 56 is laid down along the inner surface of the door, the opening/closing restriction member 56 does not interfere with the receiving shaft 54, and similar to a normal door guard. Depending on the ups and downs of the arm 53, the door becomes a caution state in which it can be opened and closed within a certain range of opening, or a state in which it can be freely opened and closed.

JP, 2006-161360, A

However, in the door guard with the lock function as described in Patent Document 1, in the locked state, when a person trying to enter the room forcibly pulls the door to open it, a large force is applied to the opening/closing restriction member 56. Therefore, unless the opening/closing restricting member 56 is made of a metal having high strength, it may be easily broken and the function of the auxiliary lock may not be achieved, and there is a problem that the manufacturing cost is high.

Therefore, the present invention is intended to provide a door guard having a lock function that enables effective auxiliary door closing while suppressing cost.

In order to solve the above problems, the present invention comprises an arm member attached to the door side that is a hinged door and a receiver attached to the fixed side with respect to the door. An arm that tilts up and down is provided, the receiving tool is provided with a receiving shaft that projects from the fixed side, and the arm has an insertion/removal hole through which the head of the receiving shaft can be inserted and removed and the door is closed. With the opening and closing of the door guard, the door guard is formed so as to sequentially communicate with the slide hole that relatively slides while the receiving shaft is engaged from the base end side to the tip end side.

That is, an abutting surface is formed on the outer surface of the arm near the base portion toward the receiving shaft, and a tapered inclined surface is formed on the receiving shaft on the base end side of the head portion of the receiving shaft. The receiving surface, which is located on the turning locus of the abutting surface due to the rotation of the arm, is formed on the bent raised portion on the base end side of the inclined surface.

Then, when the arm is erected with the door closed and the arm is rotated in a direction in which the arm falls over the erected position when the door is opened, the abutting surface of the arm abuts the receiving surface of the receiving shaft. The door was locked so that the door could not be opened.

In the door guard with a lock function according to the present invention, when the arm is erected in a state where the door is closed and the arm is rotated in a direction in which the arm falls over the erected position when attempting to open the door, the arm tries to enter the interior. Even if a person who tries to open the door forcibly pulls the door, the door is locked so that the door cannot be opened, so that the manufacturing cost can be suppressed and the safety can be secured.

The top view at the time of attaching the door guard with a lock function which concerns on embodiment of this invention to a single-opening type door, and using it in a normal caution state A plan view of the door guard with a lock function as above, which is attached to a double-door type door and used in a normal precautionary state. (A) A plan view and (b) a front view showing an arm fall state of an arm member that is used for both the one-sided opening type and the both-sided opening type. (A) A plan view of the above-mentioned single-door door receiver, (b) A front view showing the operation of the receiving shaft protruding and retracting. (A) Plan view of the above-mentioned double door receiving device, (b) Front view showing the operation of the receiving shaft protruding and retracting (A)-(f) Schematic top view which shows sequentially the transition process to the lock state of the door guard in the above-mentioned single door. The perspective view which respectively shows the (a) wind-collection state of the door guard described in patent document 1, (b) lock state, and (c) normal caution state.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

In the case of the single-opening type shown in FIG. 1, this door guard is composed of an arm member 1 attached to a door D that opens and closes, and a receiver 2 attached to a door frame F fixed to a building. Further, in the case of the double-opening type shown in FIG. 2, of the doors D ₁ and D ₂ , the arm member 1 attached to the door D ₁ which is normally opened and closed, and the receiving member attached to the door D ₂ which is normally fixed in the closed state. It is composed of a tool 2.

The arm member 1 is common to both single-opening and double-opening types, and the arm 13 is attached to the pedestal 11 fixed to the inner surface of the door D (D ₁ ) via the vertical rotation shaft 12. The arm 13 is configured to be capable of being tilted up and down with respect to the inner surface of the door D (D ₁ ) in a horizontal plane.

As shown in FIG. 3, the arm 13 has a U-shape in a side view, and an insertion/removal hole 14 is formed on the base end side which is an open end of the arm 13 and extends from the insertion/removal hole 14 to the distal end side which is a closed end. Slide holes 15 are formed in communication with each other. As will be described later, the insertion/removal hole 14 has a size such that the head of the receiving shaft 23 can be inserted and removed, and the slide hole 15 has a vertical width with which the head of the receiving shaft 23 engages.

Further, the arm member 1 rotates independently of each other about a rotary shaft 12 that is the same as the arm 13 in a horizontal plane, and in accordance with the rotation, the arm member 1 is switched between a pull-out position and a push-in position with respect to a base portion. The lever-like lock switch 16 is provided.

The lock switch 16 has a hook portion 17 on the tip side, and the hook portion 17 is formed with an inclined surface 18 in the folding direction. A claw-shaped projection is formed on the outer surface of the arm 13 near the base, and the surface of the projection facing the insertion/removal hole 14 is an abutting surface 19.

On the other hand, as the receiving tool 2, different ones are used for the one-sided opening type and the two-sided opening type, and as shown in FIGS. 4 and 5, respectively, are rotated on the receiving seat 21 fixed to the door frame F (door D ₂ ). The receiving shaft 23 is rotatably assembled via the shaft 22. These receiving tools 2 have different shapes of the receiving seats 21. The single-opening receiving seats 21 shown in FIG. 4 extend straight from the fixing surface to the door frame F, while the double-opening seats 21 shown in FIG. Of the seat 21 extends from the surface fixed to the door D ₂ so as to bend at 90°.

Then, in each of the receivers 2, the receiving shaft 23 is formed with a tapered inclined surface 24 on the base end side of the head having a larger diameter than the main shaft portion, and is bent on the base end side of the main shaft portion. A receiving surface 25 is formed on the raised portion. The receiving surface 25 is assumed to be located on the turning trajectory of the abutting surface 19 accompanying the rotation of the arm 13 after the door guard is installed (see FIG. 6).

Further, in any of the receiving members 2, as shown in FIG. 4 and FIG. 5, the receiving shaft 23 is perpendicular to the protruding position horizontally protruding from the receiving seat 21 as the receiving shaft 23 rotates about the rotating shaft 22. It is designed to be able to switch to the retreat position standing upright.

In the door guard as described above, as shown in FIG. 1 and FIG. 2, respectively, the receiving shaft 23 of the receiving tool 2 is set to the pull-out position, and the arm 13 of the arm member 1 is moved in the closed state of the door D (D ₁ ). When the receiving shaft 23 is inserted into the insertion/removal hole 14 of the arm 13 with the lock switch 16 pulled out, the receiving shaft 23 engages with the slide hole 15 when the door D (D ₁ ) is to be opened. At the same time, the door D (D ₁ ) slides relatively to the closed end, and the door D (D ₁ ) is opened in a precautionary state, so that a suspicious person can be prevented from entering the room.

Also, when not using the precaution function, in a state where the door D (D ₁₎ is closed, the arm 13 is laid down along the inner surface of the door D (D _1), the receiving shaft 23 from insertion and removal hole 14 The door D (D ₁ ) is disengaged so that the engagement between the arm 13 and the receiving shaft 23 is released so that the door D (D ₁ ) can be freely opened and closed. At this time, if the receiving shaft 23 is flipped up to the retracted position, clothes will not be caught on the receiving shaft 23 when the door D (D ₁ ) is opened and put in and out.

Further, for example, in the case of the single-open type, when the lock switch 16 is set to the push-in position (FIG. 6(b)) from the normal caution state in which the lock switch 16 is set to the pull-out position (FIG. 6(a)), When a person trying to enter the door pulls the door to open it, the hook portion 17 of the lock switch 16 and the inclined surfaces 18 and 24 of the head of the receiving shaft 23 come into contact with each other (FIG. 6C).

Then, when the door is further pulled in the opening direction, the hook portion 17 of the lock switch 16 and the inclined surfaces 18, 24 of the head portion of the receiving shaft 23 slide, and the arm 13 is pushed by the lock switch 16 to the standing position. 6(d) and 6(e), the abutting surface 19 of the arm 13 abuts the receiving surface 25 of the receiving shaft 23 (FIG. 6(f)), and the door D Is in a locked state where it will hardly open.

In this locked state, the arm 13 cannot be tilted by inserting a hand or an instrument between the door D and the door frame F, and the door is simply locked from the indoor side. In addition to the precautionary function due to the combination, it is possible to enhance the security at home.

Even if the door D is strongly pulled in the locked state, the pulling force for opening the door D does not act on the lock switch 16, so that an inexpensive resin having relatively low strength is used as the material of the lock switch 16. It can be used, and the safety can be secured while suppressing the manufacturing cost.

In this example, the case of the single-opening type is illustrated, but also in the case of the double-opening type shown in FIG. 2, when the lock switch 16 is set to the pushing position in the precautionary state, the door D ₁ is in a lock state in which it is hardly opened, and since it is impossible to defeat the arm 13 by inserting a hand or instrument between D ₁ and the door D _2, it is possible to enhance the security of the home time. In addition, an inexpensive resin having a relatively low strength can be used as the material of the lock switch 16, and the safety can be secured while suppressing the manufacturing cost.

DESCRIPTION OF SYMBOLS 1 Arm member 2 Receiver 11 Pedestal 12 Rotating shaft 13 Arm 14 Inserting/extracting hole 15 Slide hole 16 Lock switch 17 Hook part 18 Inclined surface 19 Abutment surface 21 Receiving seat 22 Rotating shaft 23 Receiving shaft 24 Inclined surface 25 Receiving surface D, D ₁ , D ₂ door F door frame

Claims (1)

It consists of an arm member (1) attached to the door side which is a hinged door, and a receiver (2) attached to the fixed side with respect to this door. 13) is provided, the receiving tool (2) is provided with a receiving shaft (23) protruding from the fixed side, and the arm (13) is provided with the head of the receiving shaft (23) with the door closed. The insertable hole (14) that can be inserted and removed and the slide hole (15) that relatively slides while the receiving shaft (23) engages with the opening and closing of the door are in communication from the proximal side to the distal side. In the formed door guard,
An abutting surface (19) is formed toward the receiving shaft (23) on the outer surface of the arm (13) near the base,
On the receiving shaft (23), a tapered inclined surface (24) is formed on the base end side of the head portion of the receiving shaft (23), and the bent slope on the base end side of the inclined surface (24) is bent. A receiving surface (25) located on the turning trajectory of the abutting surface (19) accompanying the rotation of the arm (13) is formed in the upper part,
When the arm (13) is erected with the door closed and the arm (13) is rotated in the direction in which the arm (13) exceeds the upright position and falls down when the door is opened, the abutting surface (19) of the arm (13) is ) Is in contact with the receiving surface (25) of the receiving shaft (23) to bring the door into a locked state in which the door is prevented from opening, which is a lockable door guard.

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