JPH0640813Y2 - Door guard - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a door guard that limits the opening angle of a door.

[0002]

2. Description of the Related Art Conventionally, a door guard mainly used for crime prevention consists of a hook attached to the interior surface of the door and an arm pivotally supported on the building side (door frame, etc.). When the arm is rotated to make the arm and the hook engage with each other, the hook that moves inside the arm with the opening of the door is locked at the end of the arm, and the opening angle of the door falls within the predetermined range ( Limited so that there is insufficient clearance for people to pass through.

[0003]

According to the door guard as described above, an impact sound is generated due to a strong collision when the hook is locked at the end of the arm as the door is opened.

Particularly, in the case of a steel plate flush door, the collision sound resonates, so that there is a problem that it may be a nuisance to other guests in a hotel or the like.

Therefore, an object of the present invention is to provide a door guard which absorbs an impact when the hook is locked at the end of the arm.

[0006]

In order to solve the above-mentioned problems, the present invention relates to a door guard that limits an opening angle of a door when an arm pivotally supported on a building is engaged with a hook protruding from the door. A structure is provided in which a shock absorbing member having elasticity such as rubber is provided at a terminal with which the hook of the arm collides.

[0007]

In the engagement relationship between the arm and the hook, the hook that moves toward the distal end of the arm when the door is opened collides with the shock absorbing member to limit the door opening angle, and at the same time, a shock noise is generated during the collision. Eliminate by shock absorbing member.

[0008]

Embodiments of the present invention will be described below with reference to the accompanying drawings.

Reference numeral 1 shown in FIGS. 1 and 2 is a door guard composed of a hook 2 protruding from a door A and an arm 4 pivotally supported on the building B side through a pin 3 at the end of closing the door A. Means that when the tip of the hook 2 is fitted between the parallel parts 4 and 4 of the shaft supporting side of the arm 4 which has been retracted to a position along the interior surface of the building B, and the door A is opened in this state, the hook There is no engagement relationship between 1 and the arm 4.

After the door A is closed, the arm 4 is brought into a position in an engaging relation with the hook 2 so that the distal end of the arm 4 projects toward the front.
When the door A is manually rotated and the hook 2 between the parallel portions 4 ', 4'of the arm 4 moves toward the distal end of the arm 4, as shown in FIG.
Spherical bulging part 2'provided at the tip of the and parallel part 4 ',
The engaging relationship between the arm 4 and the hook 2 is maintained by being caught by the bulging strip 4 ″ provided from the front side to the end of the opposite surface of 4 ', and when the hook 2 reaches the end of the arm 4, the door A The open angle of the is restricted as shown in FIG.

When the restriction on the opening angle of the door A is released, the arm 4 is rotated to a position parallel to the indoor surface of the building B after the closing of the door A is completed.

At the end of the arm 4, a shock absorbing member 5 having elasticity such as rubber for preventing the hook 2 from colliding with the arm 4 is provided.

The shock absorbing member 5 may use a soft synthetic resin having elasticity in addition to rubber.

In the illustrated case, the impact absorbing member 5 is attached by pushing it from the tip of the arm 4 between the parallel portions 4'and 4 ', and at the same time, the groove 6 and the bulging strip provided on the outer peripheral surface of the impact absorbing member 5. 4 "is fitted and engaged so that the shock absorbing member 5 does not drop off from the end of the arm 4.

Reference numeral 7 in the drawing denotes a recessed portion provided on the peripheral surface of the shock absorbing member 5, and a part of the outer peripheral surface of the hook 2 is fitted into the recessed portion 7. 8 is a hook 2 on the door A via a screw
A mounting seat 9 for mounting the arm 4 is mounted on the surface of the arm 4 via the pin 3 and is mounted on the building B via a screw.

With the above construction, the impact absorbing member 5 prevents the collision between the end of the arm and the hook when the opening angle of the door is limited.

[0017]

As described above, according to the door guard of the present invention, the collision between the end of the arm and the hook due to the restriction of the opening angle of the door is prevented by the impact absorbing member provided at the end of the arm. Therefore, it is possible to prevent the generation of a large impact sound, and to eliminate the inconvenience of causing annoyance to other guests due to the resonance of the collision sound that occurs in the case of the steel plate flush door.

[Brief description of drawings]

FIG. 1 is a front view of a door guard according to the present invention.

FIG. 2 is a plan view of the above.

FIG. 3 is a partially cutaway plan view showing an angle restriction of an open door.

FIG. 4 is a vertical side view of the above.

FIG. 5 is a cutaway front view of the same portion.

[Explanation of symbols]

 A door B building 1 door guard 2 hook 2'bulging part 3 pins 4 arm 4'parallel part 4 "bulging strip 5 shock absorbing member

Claims (1)

[Scope of utility model registration request] 1. A door guard that limits an opening angle of a door when an arm pivotally supported on a building engages with a hook protruding from a door, and an impact having elasticity such as rubber on a terminal with which the hook of the arm collides. A door guard characterized by having an absorbing member.