JP4443747B2 - Hinged door automatic closing device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an automatic closing device for a hinged door which is automatically closed by a door closer and is completely closed by a narrowing mechanism operated by a narrowing handle.
[0002]
[Prior art]
A door closer (door checker) that automatically closes an opened door by a hydraulic drive is provided on an upper portion of a general hinge type door. However, the door closer can close the door for the time being, but it is often difficult to completely close the door due to distortion and frictional resistance of the door.
Doors of freezers, doors that require soundproofing and deodorization, and doors of facilities that require airtightness such as work rooms of nuclear power plants that have dust containing radioactive materials are required to be completely closed. As a door for installing in such a place, there is a door provided with a narrowing mechanism for complete closing together with a door closer. In this case, a packing made of an elastic material such as a sponge is interposed between the door and the door frame, and the packing is compressed more than a certain level to keep the airtightness in the room.
[0003]
FIG. 5 is a plan view of a hinged door having a conventional narrowing mechanism as viewed from above, and FIG. 6 is a cross-sectional view thereof. The door 1 is rotatably connected to a door frame 3 attached to the wall 2 by a hinge mechanism 4, a door closer 5 is attached between the upper part of the door 1 and the upper part of the door frame 3, and the hinge mechanism of the door 1 is further provided. A narrowing mechanism 6 is provided at the end opposite to 4. The narrowing mechanism 6 includes a rotatable shaft 7 penetrating from the outer surface side to the inner surface side of the door 1, two narrowing handles 8 fixed to both ends of the shaft 7, and a closing link connected to one of the narrowing handles 8. It has a piece 9. The closing piece 9 is engaged with a receiving member 10 provided on the door frame 3 so as to completely close the door 1, and the contact surface with the receiving member 10 is a tapered surface for narrowing down.
[0004]
The door 1 moves automatically from the open state to the closed state by the action of the door closer 5, but cannot be completely closed. Therefore, when the door 1 is temporarily closed, when the narrowing handle 8 on either the outer surface side or the inner surface side of the door 1 is rotated by hand, the closing piece 9 connected thereto contacts the receiving member 10, The compressible packing 11 provided on the door 1 or the door frame 3 is engaged while being compressed by the action of going up the taper surface to be in a completely closed state.
[0005]
[Problems to be solved by the invention]
Thus, even the door 1 having the narrowing mechanism 6 cannot be completely closed unless the narrowing handle 8 is operated. Therefore, measures to forget to operate the narrowing handle are strongly demanded.
Accordingly, an object of the present invention is to provide an automatic closing device for a hinged door that automatically drives a narrowing mechanism and completely closes even when such a forgetting operation of the narrowing handle occurs.
[0006]
[Means for Solving the Problems]
That is, the present invention automatically closes the door (1) with the door closer and is interposed between the door (1) and the door frame (3) by the narrowing mechanism (6) operated by the narrowing handle (8). and by a packing (11) made of an elastic material to compress certain level, I self-closing device der the hinged door completely closed so as to keep the airtight chamber,
The narrowing mechanism (6) includes a rotatable shaft (7) penetrating from the outer surface side to the inner surface side of the door (1) and two manual narrowing handles (fixed to both ends of the shaft (7)) ( 8), a closing piece (9) connected to the narrowing handle (8), and a receiving member (10) provided on the door frame (3), the closing piece (9) and the receiving member (10) Is in contact with the rotation of the closing piece (9), the contact surface is a tapered surface for narrowing down,
Separately from the narrowing handle (8), it is connected to the shaft (7 ) and automatically drives the door narrowing mechanism (6), and a closing detector (17) for detecting door closing. The controller (19) outputs a drive signal to the drive unit (12) so as to drive the narrowing mechanism (6) to the door closed position by the door close detection signal from the close detector (17),
The control device (19) outputs a drive signal after a preset time elapses after the closing detector (17) detects the door closing without rotating the manual narrowing handle (8). (Claim 1).
[0007]
The automatic closing device of the driving unit may have a drive lever for driving a narrowing mechanism in the door closed position, and a driving source for driving the drive lever (claim 2).
[0008]
DETAILED DESCRIPTION OF THE INVENTION
Next, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a sectional view of a hinged door using the automatic closing device of the present invention as seen from the front, FIG. 2 is a sectional view taken along the line II-II, and FIG. 3 is an enlarged view of a narrowing mechanism portion in FIG. 5 and 6 are denoted by the same reference numerals. The door closer is not shown.
In these drawings, a drive unit 12 is provided adjacent to the narrowing mechanism 6 provided in the door 1. The drive unit 12 includes an arm 13 fixed in the middle of the shaft 7 that connects the two front and back narrowing handles 8 to each other, a drive lever 14 that rotates by pressing the arm 13 clockwise in FIG. 3, and the drive lever 14. A drive source 15 for driving is provided. For example, a reduction motor having a gear mechanism is used as the drive source 15.
[0009]
The drive source 15 is provided with a position detector 16 that detects the rotational position of the drive lever 14. A small limit switch (micro switch) or proximity switch is used as the position detector.
A close detector 17 for detecting door close is provided above the door 1. The close detector 17 detects that the door 1 is closed by the door closer, and for example, a proximity switch is used. The drive source 15, the position detector 16 and the close detector 17 are connected to a control device 19 (FIGS. 1 and 4) provided outside the door 1 by a wiring cable 18.
[0010]
FIG. 4 is a block diagram showing an example of the control device 19. The control device 19 includes a delay element 20, pulse conversion elements 21 and 22, a flip-flop element 23, a power amplification unit 24 such as a power transistor, and a control unit 25 using a thyristor. The delay element 20 is a delay circuit composed of a variable capacitor and a resistor. By changing the capacity of the variable capacitor, the delay time can be set in a range of 3 to 30 seconds, for example. The delay element 20 is provided in order to provide a time margin so that the narrowing handle 8 can be operated by human power. Therefore, when there is no need for this, the delay element 20 is omitted, and the control device 19 is configured by a path like a dotted line.
[0011]
Next, the operation of the automatic closing device shown in FIGS. 1 to 3 will be described with reference to FIG. First, when the door 1 is closed by the door closer, the closing detector 17 is activated to close the contact. The delay element 20 that has received the operation signal from the closed detector 17 is timed up after the set delay time elapses, whereby a pulse is output from the pulse conversion element 21 and the flip-flop element 23 is set. The power amplification unit 24 is driven by the set signal, and the control unit 25 drives the drive source 15.
[0012]
As shown in FIG. 3, when the drive source 15 is driven, the drive lever 14 rotates counterclockwise as indicated by an arrow, whereby the arm 13 fixed to the shaft 7 is pressed and rotated clockwise. The shaft 7 is rotated by the rotation of the arm 13, and the two narrowing handles 8 connected to the shaft 7 are also rotated clockwise as indicated by arrows. Then, the closing piece 9 connected to one of the narrowing handles 8 is engaged with the receiving member 10 provided on the door frame 3, and the door 1 is completely closed while compressing and crushing the packing 11 (see FIG. 6).
[0013]
From this state, the drive lever 14 continues to rotate further away from the arm 13 and operates the position detector 16. Then, a pulse is output from the pulse conversion element 22 (FIG. 4), thereby resetting the flip-flop element 23 and stopping the drive source 15, so that the drive lever 14 stands by at that position. Thereafter, the same operation is repeated every time the door 1 is closed.
[0014]
【The invention's effect】
As described above, the hinged door automatic closing device according to the present invention includes a drive unit that drives a narrowing mechanism, a closing detector that detects the closing of the door, and a closing mechanism that closes the narrowing mechanism by a door closing detection signal from the closing detector. A control device that outputs a drive signal to the drive unit so as to drive to a position is provided. Therefore, incomplete closing of the door due to forgetting to operate the narrowing handle can be automatically resolved. In addition, there is an effect that it is not particularly necessary to manually operate the narrowing handle every time the door is opened and closed.
[0015]
In addition , the control device is configured to output a drive signal after a preset time has elapsed since the closing detector detects the door closing, so that it is possible to operate the narrowing handle manually. Can be given.
In the above automatic closing device, the driving unit can have a driving lever for driving the narrowing mechanism to the door closing position and a driving source for driving the driving lever, thereby reliably closing the door with a simple structure. can do.
[Brief description of the drawings]
FIG. 1 is a sectional view of a hinged door using an automatic closing device of the present invention as seen from the front.
2 is a cross-sectional view taken along the line II-II in FIG.
FIG. 3 is an enlarged view of a narrowing mechanism portion in FIG. 1;
4 is a block diagram of a control device 19. FIG.
FIG. 5 is a plan view of a hinged door having a conventional narrowing mechanism.
6 is a cross-sectional view of FIG.
[Explanation of symbols]
1 door 2 wall 3 door frame 4 hinge mechanism 5 door closer 6 narrowing mechanism 7 shaft 8 narrowing handle 9 closing piece 10 receiving member 11 packing 12 driving unit 13 arm 14 driving lever 15 driving source 16 position detector 17 closing detector 18 wiring Cable 19 Control device 20 Delay element 21 Pulse conversion element 22 Pulse conversion element 23 Flip-flop element 24 Power amplification section 25 Control section

Claims (2)

The door (1) is automatically closed by the door closer and is made of an elastic material interposed between the door (1) and the door frame (3) by the narrowing mechanism (6) operated by the narrowing handle (8). A hinge-type door automatic closing device that compresses the packing (11) above a certain level and completely closes the interior so as to maintain airtightness in the room ,
The narrowing mechanism (6) includes a rotatable shaft (7) penetrating from the outer surface side to the inner surface side of the door (1) and two manual narrowing handles (fixed to both ends of the shaft (7)) ( 8), a closing piece (9) connected to the narrowing handle (8), and a receiving member (10) provided on the door frame (3), the closing piece (9) and the receiving member (10) Is in contact with the rotation of the closing piece (9), the contact surface is a tapered surface for narrowing down,
Separately from the narrowing handle (8), it is connected to the shaft (7 ) and automatically drives the door narrowing mechanism (6), and a closing detector (17) for detecting door closing. The controller (19) outputs a drive signal to the drive unit (12) so as to drive the narrowing mechanism (6) to the door closed position by the door close detection signal from the close detector (17) ,
The control device (19) outputs a drive signal after a preset time elapses after the closing detector (17) detects the door closing without rotating the manual narrowing handle (8). An automatic closing device for a hinged door characterized by that. 2. The hinge type according to claim 1, wherein the drive unit (12) has a drive lever (14) for driving the narrowing mechanism (6) to the door closed position and a drive source (15) for driving the drive lever (14). Automatic door closing device.

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