JP3446049B2 - Guard arm receiver linked with smoke detector - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a smoke detector interlocking guard arm receiver in a guard arm device for limiting the opening angle of a door.

[0002]

2. Description of the Related Art When a guard arm is actuated to open a door, a guard arm receiver (reception seat) in a guard arm device which holds the door in an open state near a maximum opening angle is, for example, a real one. It is known and is disclosed in, for example, Japanese Patent Laid-Open No. 2-105472.

According to such a conventional guard arm receiver, since the door can be held in an open state, it is convenient when ventilating inside or outside the room or responding to an outsider, and there is an advantage that it is safe for crime prevention.

[0004]

However, according to the guard arm receiver as described above, when the door is held open by the guard arm, a fire occurs and the door is left open. However, there is a problem of fire spread and the flow of toxic gas, which is dangerous.

The smoke detector interlocking type guard arm receiver of the present invention has a door attached to the door, which is locked and held in an open state by the guard arm when smoke of a fire is detected by the smoke detector. It was proposed for the purpose of enabling the closure of the closers by utilizing the biasing force of the closers.

[0006]

In order to achieve the above object, the guard arm receiver according to the present invention is a guard arm receiver that is opposed to a guard arm provided on the open end surface of the door; A door closer must be attached to the guard; the front plate of the guard arm receiver must be provided with a receiving hole for engaging and disengaging the engaging projection of the guard arm and a guide elongated hole continuous therewith; near the end of the guide elongated hole Pivotally support a swingable set plate inside the guard arm receiver in order to selectively lock and hold the engagement projection of the guard arm; direction in which the tip side of the set plate is locked to the engagement projection A compression spring on the proximal side of the set plate to urge the set plate; a slidable set block abuts on the proximal end of the compression spring to press the tip of the compression spring against the set plate. Pivoting a swingable stopper for controlling the position of the set block inside the guard arm receiver so that the set plate can occupy the lockable position or the released position; Providing an electromagnetic actuator inside the guard arm receiver which is actuated by a signal from a smoke detector located in the building to disengage;
Further, the plunger of the electromagnetic actuator is linked to the stopper.

According to the second aspect of the present invention, the set condition is additionally provided with a knob exposed to the outside from the surface plate of the guard arm receiver.

[0008]

1 and 2 show a state in which the guard arm receiver according to the present invention holds and holds the door, that is, the guard arm 10 in an open state.
The engaging projection 20 of the set plate 2 reaches the end of the guide elongated hole 15 in the surface plate 11 and occupies the normal waiting position.
It is locked and held by.

At this time, the base end side of the set plate 2 is strongly pushed by the compression spring 3 which is sufficiently compressed by the set block 4, and the tip end side of the set plate 2 is guard arm 1.
The engagement protrusion 20 of 0 is locked.

Here, the set block 4 is at a front position close to the set plate 2, and that position is the stopper 5
It is restrained by the engagement with.

If the door is pushed or pulled by hand while the guard arm is in operation, the engagement protrusion 20 of the guard arm 10 is pulled.
Can be freely engaged with and disengaged from the set plate 2.

In the state shown in FIGS. 1 and 2, when a smoke detector (not shown) detects the smoke of a fire, the electromagnetic actuator 6 that receives the signal operates in the retracted direction and the plunger 61 is linked. Since the stopper 5 is swung clockwise in FIG. 1, the engagement between the stopper 5 and the set block 4 is released.

The set block 4 includes a compression spring 3
1 moves to the right rear position in FIG. 1, the pressing force on the base end side of the set plate 2 by the compression spring 3 is reduced, and the door urged in the closing direction by the door closer (not shown) is set. The restraining force of the guard arm 10 on the tip side of the plate 2 against the engaging projection 20 is overcome, and the guard arm 10 is closed while being folded into the storage position.

When the electromagnetic actuator 6 is de-energized, the set block 4 located at the rear position is
By manually returning it to the left front position in FIG. 1 with an appropriate tool or knob 42, both the set plate 2 and the stopper 5 return to their original positions.

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the embodiments shown in the drawings. In FIGS. 1 and 2, reference numeral 10 is a guard arm provided on the open end surface of the door (not shown),
The base end of the guard arm 10 is supported by a substantially horizontal pivot,
The tip has an engagement protrusion 20 composed of a flange and a shaft.

Generally, the guard arm 10 is projected and inserted from the front plate of the door by operating a thumb turn in the door locking device.

The guard arm receiver 1 provided to face the guard arm 10 has a front plate 11 including a back plate 12.
And a frame box 13 fixed to it, and fixed to the door frame 30 or the other door of the double doors with a screw 91 or the like.

Then, the surface plate 11 of the guard arm receiver 1
A receiving hole 14 into which the engaging protrusion 20 of the guard arm 10 is engaged and disengaged, and a guide elongated hole 15 continuous to the receiving hole 14 are formed in the.

The door on which the guard arm 10 is mounted requires a door closer (not shown). The door closer naturally urges the door in the closing direction. In FIG. 1, reference numeral 17 indicates a dead bolt insertion hole.

The above-mentioned configuration is well known in the art. The main part of the present invention will be described below. Reference numeral 2 is a set plate pivotably supported on the inside of the guard arm receiver 1 with a pivot shaft 21, an example of which is clearly shown in FIG.

In the figure, 22 is a bent portion for locking provided at the tip of the set plate, and 23 is a support piece integrally provided on both sides of the central portion of the set plate.

The set plate 2 is for selectively locking and holding the engaging projection 20 of the guard arm 10 near the end of the guide elongated hole 15 in the guard arm receiver 1.

The leading end of the set plate 2 is engaged with the engaging projection 20.
A compression spring 3 is provided on the base end side of the set plate 2 in order to urge the set plate 2 in the direction to be locked.

The lengthwise end of the compression spring 3 is pressed against the set plate 2, and the base end of the spring 3 abuts against the set block 4 which is slidable in the lateral direction in FIG. 2 from the front. I am allowed.

The set block 4 is slidably guided by a guide block 41 fixed to the frame box 13 and a through hole 16 provided in the surface plate 11. The set block 4 is integrally provided with a knob 42 that can be grasped with fingers in order to return it to the front position after reaching the rear position. Exposed to. The fit between the knob 42 and the through hole 16 serves as a guide means for sliding the set block 4.

Reference numeral 5 is a stopper pivotally supported in the guard arm receiver 1 by a horizontal pivot shaft 51. In the embodiment, as shown in FIG. 2, one plate member is appropriately bent. Has been formed. Reference numeral 52 denotes a trochanter provided on the stopper 5 for smoothing the engaging operation with the set block 4.

The stopper 5 controls the position of the set block 4 so that the set plate 2 can occupy the lockable position or the release position of the guard arm 10 with respect to the engaging projection 20. Depending on whether the set block 4 is engaged or disengaged, the set block 4 occupies a front position (left position in FIG. 1) or a rear position (right position in FIG. 1).

Reference numeral 6 indicates a frame 13 of the guard arm receiver 1.
With the electromagnetic actuator provided therein, the plunger 61 is retracted against the return spring 62 for return when energized, and the plunger 61 returns to the original position when de-energized.

Plunger 61 of electromagnetic actuator 6
Is linked to the stopper 5 through an action piece 63 which also serves as a spring stopper, and the electromagnetic actuator 6 is activated by a signal from a smoke detector (not shown) provided in the building to operate. Stopper 5 for set block 4
Disengage the.

[0030]

According to the smoke detector interlocking type guard arm receiver of the present invention described above, even if the door is held in a half-open state by the guard arm for the purpose of ventilation, the smoke is detected when a fire occurs. It is possible to close the door by automatically releasing the locked guard arm by energizing the electromagnetic actuator and closing the door, thus preventing fire spread and toxic gas flow, and safety. It is extremely advantageous to increase.

[Brief description of drawings]

FIG. 1 is a partial front view showing an embodiment of a smoke detector interlocking type guard arm receiver of the present invention.

FIG. 2 is a vertical sectional side view thereof.

FIG. 3 is an enlarged side view of the set plate taken out from the guard arm receiver of FIG.

[Explanation of symbols]

10 Guard arm 20 Engaging protrusion 1 Guard arm receiver 11 Surface plate 14 Receiving hole 15 Guide long hole 2 set plates 3 compression springs 4 set blocks 42 knob 5 stopper 6 Electromagnetic actuator 61 Plunger

─────────────────────────────────────────────────── ─── Continued Front Page (58) Fields surveyed (Int.Cl. ⁷ , DB name) A62C 2/06 504 E05C 17/02

Claims (2)

(57) [Claims] 1. A guard arm receiver to be installed opposite to a guard arm provided on the open end surface of the door; A door closer is attached to the door; A guard arm is engaged to a surface plate of the guard arm receiver. A receiving hole through which the projection is engaged and disengaged and a guide elongated hole continuous therewith are provided; in order to selectively retain the engaging projection of the guard arm near the terminal end of the guide elongated hole, the guard arm support Pivotally supporting a swingable set plate inward of the set plate; providing a compression spring on the base end side of the set plate to bias the tip side of the set plate in the direction of locking the set projection; Abutting a slidable set block on the proximal end of the compression spring to press the tip of the spring against the set plate; allowing the set plate to occupy the lockable or unlocked position Pivoting a swingable stopper that controls the position of the set block inside the guard arm receiver; actuated by a signal from a smoke detector in the building to disengage the stopper from the set block A smoke detector interlocking type guard arm receiver, the construction of which is to provide the electromagnetic actuator so arranged inside the guard arm receiver; and the plunger of the electromagnetic actuator to be linked to the stopper. 2. The smoke detector interlocking type guard arm receiver according to claim 1, wherein the set block is provided with a knob exposed to the outside from the surface plate of the guard arm receiver.