JP2003193743A - Automatic door - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve safety by facilitating manual opening/closing of an opening/closing door in an emergency. <P>SOLUTION: This automatic door 11 is composed of an opening/closing door 13 for opening/closing a doorway; a drive mechanism for moving the opening/ closing door 13; and a controller 34 for moving the opening/closing door 13 to open/close the doorway by controlling a drive motor 26 of the drive mechanism on the basis of a detection signal from a start sensor for detecting an object in proximity. The drive mechanism is composed of a driving pulley 25 and a driven pulley 24; a timing belt 23 wound around the driving pulley 25 and driven pulley 24 and disposed along the moving direction of the opening/ closing door 13 which is connected to the timing belt 23; and the drive motor 26. The driving pulley 25 is directly fixed to a rotating shaft 27 of the drive motor 26, and the driving pulley 25 is directly rotated by the drive motor 26. An automatic closing device 32 is provided for energizing the opening/closing door 13 always in the closing direction of the doorway. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic door which is installed at a doorway of a building and automatically opens and closes a door by detecting a passerby or the like.

[0002]

2. Description of the Related Art Generally, an automatic door is provided at a doorway of a building, and the door is automatically opened / closed by detecting an approaching passerby. Here, the structure of automatic doors that have been installed a lot in recent years will be described by taking the structure shown in FIG. 3 as an example.

In the figure, reference numeral 1 is a double-opening type automatic door. This automatic door 1 has a drive unit 2 installed at an upper part of an entrance / exit of a building, and an opening / closing door 3 which is opened and closed by the drive unit 2.
Fix plates 4 are provided on both sides of the open / close doors 3, and the open / close doors 3 move along the fix plates 4.

Further, on the front and back sides of the automatic door 1, a start sensor 5 for detecting an approaching person or object is provided on the upper side thereof, and when the start sensor 5 detects a person or object, A drive motor (not shown) is driven by a controller provided in the drive unit 2, the opening / closing door 3 moves along the fix plate 4, and the doorway is opened. In the drive unit 2 that opens and closes the opening and closing door 3 of the automatic door 1, there are provided timing belts wound around pulleys provided at both ends thereof, and the opening and closing door 3 is fixed to the timing belt. Has become. When the drive motor rotates one pulley to rotate the timing belt, the opening / closing door 3 fixed to the timing belt moves.

[0005]

By the way, a drive motor is provided with a reduction gear such as a helical gear, a worm gear, and a hypoid gear, and one that rotates a pulley around which a timing belt is wound is provided through the reduction gear. Generally, in the automatic door 1 of the type in which the driving force is transmitted by the drive mechanism having the speed reducer, the speed reducer is used when the opening / closing door 3 is manually opened / closed in an emergency such as a power failure. It was a great resistance, and it was difficult to open and close the opening / closing door 3 easily.

Some automatic doors 1 of this type are provided with an automatic closing device for automatically closing the opening / closing door 3 in order to prevent burning in the event of a fire. As this automatic closing device, mechanical ones using springs and hydraulic cylinders that always operate stably are used more often than electrical ones that are unreliable due to deterioration of the battery etc. Since the device moves and closes the opening / closing door 3 with a large force against the resistance of the speed reducer of the drive mechanism part, in particular, in the automatic door 1 equipped with such an automatic closing device, the opening / closing door is manually operated. It was even more difficult to move 3 and open the doorway.

The present invention has been made in view of the above circumstances, and it is an object of the present invention to provide an automatic door with excellent safety that can be easily opened and closed manually in an emergency.

[0008]

In order to achieve the above object, an automatic door according to a first aspect of the present invention is an opening / closing door for opening / closing an entrance / exit, and moving the opening / closing door at a predetermined speed to open / close the entrance / exit. An automatic door having a drive mechanism and a controller for moving the opening / closing door by controlling the drive mechanism based on a detection signal from an activation sensor for detecting an approaching object, wherein the drive mechanism is a pair of pulleys. When,
A timing belt, which is wound around the pulley and arranged along the moving direction of the opening / closing door, and is connected to the opening / closing door, and one of the pulleys is rotated to rotate the timing belt to rotate the opening / closing door. And a drive motor for moving the drive motor, and the pulley is directly fixed to a rotation shaft of the drive motor.

As described above, since one pulley around which the timing belt for transmitting the driving force of the driving motor to the opening / closing door is wound is directly fixed to the rotating shaft of the driving motor, the driving force of the driving motor is rotated. It is possible to move the opening / closing door with a small force when the drive motor is stopped, as compared with a conventional structure in which the speed reducer has a large resistance such as a speed reducer that transmits the power to the pulley. As a result, even in an emergency when the drive motor is stopped, such as during a power outage, it is possible to move the open / close door with a small force to open the entrance and exit, and in particular,
The safety in an emergency is improved.

According to a second aspect of the present invention, there is provided an automatic door according to the first aspect, further comprising an automatic closing device for constantly urging the opening / closing door in a closing direction of the doorway.

That is, the pulley is directly fixed to the rotary shaft of the drive motor without using a speed reducer.
Since the opening / closing door can be moved with a small force when the drive motor is stopped, an automatic closing device that urges the opening / closing door in the closing direction in order to keep the door closed by the opening / closing door to prevent burning in case of fire. However, the one having a small biasing force can be used. Thus, for example, even when the automatic closing device urges the opening / closing door and the opening / closing door is closed by the automatic closing device at the time of power failure or fire, the opening / closing door can be smoothly moved with a small force to open the opening / closing door. It becomes possible to pass through and evacuate.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An automatic door according to an embodiment of the present invention will be described below with reference to the drawings. It should be noted that here, a single-open type in which the doorway is opened and closed by moving one opening / closing door will be described as an example. In FIGS. 1 and 2, reference numeral 11 is an automatic door of this embodiment. The automatic door 11 has a drive unit 12 installed at an upper part of an entrance / exit of a building, and an opening / closing door 13 which is opened and closed laterally along the entrance / exit by the driving unit 12. A fix plate 14 is provided on the side portion of the open / close door 13, and the opening / closing door 13 moves along the fix plate 14.

When a person or an object is detected by a start sensor (not shown) provided on the upper and lower sides of the automatic door 11, a drive motor is driven by a controller provided in the drive unit 12 to open and close the door. The door 13 moves along the fix plate 14 so that the doorway is opened.

The drive unit 12 is provided with a hanger rail 21 along the longitudinal direction thereof.
It is fixed to and supported by the bracket 20 that forms part 2. A plurality of hanging door wheels 22 rotatably supported on the upper end of the opening / closing door 13 are hooked on the hanger rail 21, and the opening / closing door 13 is movably suspended along the hanger rail 21. . The lower end of the opening / closing door 13 is arranged and guided in a groove-shaped guide rail 19.

Next, the structure of the drive mechanism for driving the opening / closing door 13 to open / close will be described. A timing belt 23 is arranged above the hanger rail 21. The timing belt 23 is wound around a driven pulley 24 rotatably provided at one end of the drive unit 12 and a drive pulley 25 provided at the other end of the drive unit 12. The drive pulley 25 is directly fixed to a rotary shaft 27 of a drive motor 26 fixed to the bracket 20,
It is adapted to be directly rotated by the drive motor 26.

The timing belt 23 is connected to the hanging door wheel 22 of the opening / closing door 13 by an arm 30. Then, the drive motor 25 directly rotates the drive pulley 25, whereby the timing belt 23 wound around the drive pulley 25 and the driven pulley 24 is rotated, and the timing belt 23 is connected to the timing belt 23 by the arm 30. The opening / closing door 13 is configured to move along the hanger rail 21.

The drive unit 12 includes a guide rod 28, which is supported at its upper and lower ends by brackets 28a on the timing belt 23.
The guide rod 28 is provided with a sliding piece 29 so as to be slidable.
To the sliding piece 29, the other end of a connecting fitting 31 having one end fixed to the upper end of the opening / closing door 13 is fixed.

An automatic closing device 32 is fixed to the bracket 20 at one end of the drive unit 12. A wire 33 is projected from a part of the automatic closing device 32, and an end portion of the wire 33 is connected to the sliding piece 29. This automatic closing device 32 has
A spiral spring (not shown) is provided in the interior thereof, and the spiral spring constantly urges the wire 33 in a direction to be pulled inward.

Therefore, the sliding piece 29 to which the end portion of the wire 33 is connected is urged toward the one end side of the drive unit 12 by the spiral spring in the automatic closing device 32, whereby the sliding piece 29 is moved. The opening / closing door 13 connected by the connecting fitting 31 is urged in a direction of closing the doorway. In addition, inside the drive unit 12,
A controller 34 is provided, and the controller 34 drives the drive motor 26 based on the detection signal from the start sensor.
Is controlled to open and close the entrance and exit by the opening and closing door 13.

In the automatic door 11 as described above, when the activation sensor detects an approaching object such as a passerby, the detection signal is transmitted to the controller 34. When the detection signal is transmitted from the activation sensor, the controller 34 supplies drive power to the drive motor 26 from a power unit (not shown).

As a result, the drive motor 26 is driven, the rotary shaft 27 thereof is rotated, the drive pulley 25 directly fixed to the rotary shaft 27 is rotated, the timing belt 23 is rotated, and the opening / closing door 13 is moved. However, the entrance / exit is open, and passage through this entrance / exit is possible.

As described above, the automatic door 13 in which the drive pulley 25 around which the timing belt 23 for transmitting the driving force of the drive motor 26 to the opening / closing door 13 is wound is directly fixed to the rotary shaft 27 of the drive motor 26. According to the above, the opening / closing door 1 is operated when the drive motor 26 is stopped.
3 can be moved with a small force. Therefore, as the automatic closing device 32 that moves the opening / closing door 13 to close the entrance / exit to prevent burning when a fire occurs, a device having a small biasing force can be used.

Thus, for example, in the event of a power failure or fire, the supply of drive power to the drive motor 26 is stopped, and the opening / closing door 13 is pulled by the automatic closing device 32 in the direction of closing the doorway, and the doorway is opened / closed. Even when the door 13 is closed by the door 13, as compared with a conventional structure having a speed reducer that reduces the rotational speed of the drive motor 26 and transmits it to the drive pulley 25, the speed reducer has a large resistance.
When the opening / closing door 13 is manually moved, the opening / closing door 13 can be smoothly moved with a small force to pass through the entrance / exit to evacuate. That is, even in an emergency, the opening / closing door 13 can be reliably opened / closed to pass through the entrance / exit, and the automatic door 11 can be made extremely excellent in safety.

In the above example, one opening / closing door 13
Although the single-opening type in which the door is moved to open and close the entrance is described as an example, it is of course applicable to a double-opening type in which the pair of opening / closing doors 13 are moved to open and close the entrance.

[0025]

As described above, according to the automatic door of the present invention, the following effects can be obtained. Claim 1
According to the automatic door described above, one pulley around which the timing belt for transmitting the driving force of the driving motor to the opening / closing door is wound is directly fixed to the rotating shaft of the driving motor, so that the driving force of the driving motor is rotated. Compared with a conventional structure having a reduction gear that reduces the number and transmits the pulley to the pulley, the opening / closing door can be moved with a small force when the drive motor is stopped. As a result, even in an emergency when the drive motor is stopped, such as during a power outage, the door can be moved with a small force to open and close the door, and in particular, safety in an emergency can be improved. it can.

According to another aspect of the present invention, the automatic door has a structure in which the pulley is directly fixed to the rotary shaft of the drive motor without using a speed reducer, and the open / close door is opened with a small force when the drive motor is stopped. Since it can be moved, a small urging force can be used as an automatic closing device for urging the opening / closing door in the closing direction in order to keep the door closed by the opening / closing door in order to prevent burning in the event of a fire. . With this, for example, even if the opening / closing door is biased by the automatic closing device and the opening / closing door is closed by the automatic closing device at the time of power failure or fire, the opening / closing door can be smoothly moved with a small force to open the opening / closing door. You can pass and evacuate.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of an automatic door illustrating a configuration and a structure of the automatic door according to an exemplary embodiment of the present invention.

FIG. 2 is a side sectional view of the automatic door for explaining the configuration and structure of the automatic door according to the embodiment of the present invention.

FIG. 3 is a perspective view of an automatic door for explaining the configuration and structure of a general automatic door.

[Explanation of symbols]

11 automatic doors 13 open / close door 23 Timing belt 24 Driven pulley (pulley) 25 Drive pulley (pulley) 26 Drive motor 27 rotation axis 32 Automatic closing device 34 Controller

Claims (2)

[Claims] 1. An opening / closing door for opening / closing an entrance / exit, a drive mechanism for moving the opening / closing door at a predetermined speed to open / close the entrance / exit, and the drive based on a detection signal from an activation sensor for detecting an approaching object. An automatic door having a controller for controlling a mechanism to move the opening / closing door, wherein the drive mechanism is arranged along a moving direction of the opening / closing door and wound around the pair of pulleys. There is a timing belt to which the opening / closing door is connected, and a drive motor that rotates the timing belt by rotating one of the pulleys to move the opening / closing door, and the pulley has a rotation shaft of the driving motor. An automatic door characterized by being fixed directly. 2. The automatic door according to claim 1, further comprising an automatic closing device for constantly urging the opening / closing door in a closing direction of the doorway.