KR20110008674A - Drive of an swing-type automatic door - Google Patents

Abstract

PURPOSE: A drive unit of an automatic hinged door is provided to protect devices and prevent accidents by actuating a brake or cutting off power supply when an abnormal external force is applied during the swinging of the automatic hinged door. CONSTITUTION: A drive unit of an automatic hinged door comprises a motor(10), a speed reducer(20), a clutch steel plate(30), a clutch magnet plate(32), and a driven shaft(50). The speed reducer is connected to the motor and decelerates the rotation of the motor. The clutch steel plate, around which a clutch coil(31) is wound, is connected to a power transmission shaft(21) of the reducer. The clutch magnet plate is attached to the clutch steel plate with the magnetic force and transfers the power of the motor. The driven shaft is connected to the clutch magnet plate and transfers the torque of the motor to the door.

Description

Drive of an swing-type automatic door

The present invention relates to a driving device of a sliding automatic door which is automatically opened or closed by a signal of a sensor for detecting a person's approach.

Automatic doors operate in the form of sliding or sliding doors, which can be installed in a place where many patients come and go, such as a hospital, or at a doorway where freight is frequently accessed, such as a warehouse or a storage room. It is for convenience.

In general, sliding side (sliding) automatic door that is opened side, the existing door has to be dismantled and newly installed, there is a problem that requires a lot of space for installation, there is a restriction on use.

On the other hand, the swinging automatic swing doors can be easily installed on existing manual doors, making them inexpensive to install and requiring no additional space for installation, which makes them much more versatile than sliding automatic doors. On the side.

Figure 1 shows an example of a conventional automatic opening door. Fig. 1A is a top sectional view of the automatic door, and b is a sectional view showing an operating state of the automatic door.

In the automatic door, the auxiliary frame 1 is coupled to the frame 2 in a hinged manner. A drive device including a motor 3 is built in the frame 2 so that the rotational force of the motor 3 is transmitted to the frame 2 via the reducer 4. The door 5 is integrally connected to the frame 2, so that when a signal is applied from the sensor or the like, the door 5 rotates forward or reverse according to the rotation of the motor 3.

2 is a view illustrating a state in which a conventional automatic automatic door is operated. (A) is a figure which shows the state in which the door was closed, and (b) is a figure which shows the state in which the door is opened.

The opening and closing automatic door has a driving device 6 attached to the upper end of the door 5, and a driven shaft that receives the driving force from the driving device 6 is connected to the linking device 7. One end of the linkage 7 is fixed to the door frame.

Normally, the door 5 is closed as shown in Fig. 2A. As shown in (b) of FIG. 2, when the sensor (not shown) detects the traffic of a person entering the direction of the arrow, the driving device 6 is operated and the driven shaft is rotated by the driving device 6. do. Rotation of the driven shaft rotates the linking device 7, and as the linking device is opened, the door 5 is opened in the direction of travel of the person. When the door 5 is opened by 90 °, the motor stops. When the motor is rotated in the reverse direction after waiting for a predetermined time, the door 3 is closed by rotating by 90 ° in the opposite direction.

However, in the conventional automatic automatic door, even if the resistance is generated in the rotational direction of the door due to people or obstacles coming from the opposite direction while the door is opened, until the door is opened by a predetermined angle, for example, 90 ° There was a problem that the rotation of the motor is overheated or other gear devices are excessive. In addition, when the automatic door is installed outside the building, the driving force is continuously transmitted to the door by the motor even if the rotation of the door is excessively accelerated by the influence of external force, such as a strong wind blowing in the direction of opening the door. There was a risk of safety accident, such as damage to the device or personal injury.

Therefore, the present invention has been invented in view of the above circumstances, and when an abnormal external force is applied during the rotation of the automatic door, a brake type automatic door which protects the mechanical device and prevents a safety accident by operating a brake or blocking power transmission. The purpose is to provide.

According to a first aspect of the present invention, there is provided a driving apparatus of a sliding automatic door that opens and closes a door. A speed reducer connected to the motor to reduce rotation from the motor; A disk-shaped clutch iron plate connected to a power transmission shaft of the reducer and having a clutch coil wound on the outside thereof; A disc-shaped clutch magnet plate attached to the clutch iron plate by a magnetic force to transfer power of a motor; A driven shaft connected to the clutch magnet plate to transmit a rotational force of the motor to the door; A motor power supply unit supplying current to the motor; A clutch coil power supply unit supplying current to the clutch coil; It characterized in that it comprises a control unit for controlling the operation of the components.

According to a second aspect of the present invention, there is provided a driving apparatus of a sliding automatic door that opens and closes a door. A speed reducer connected to the motor to reduce rotation from the motor; A disc-shaped clutch magnet plate connected to the power transmission shaft of the reducer; A disc-shaped clutch iron plate attached to the clutch magnet plate by a magnetic force to transmit power of a motor, and to which a clutch coil is wound; A driven shaft connected to the clutch iron plate to transmit a rotational force of the motor to the door; A motor power supply unit supplying current to the motor; A clutch coil power supply unit supplying current to the clutch coil; It characterized in that it comprises a control unit for controlling the operation of the components.

In addition, a disc-shaped brake iron plate is inserted into the driven shaft so as to be horizontally movable in the axial direction; A disc-shaped brake coil plate inserted into the driven shaft to be spaced apart from the brake iron plate to be fixed to the fixed part and wound around the brake coil; Further comprising a brake coil power supply for supplying current to the brake coil, when the current is supplied to the brake coil, the brake iron plate is attached to the brake coil plate by a magnetic force to function as a brake against the rotation of the motor It is done.

The apparatus may further include a rotation sensing device configured to detect the rotational speed of the driven shaft, wherein the controller is configured to set the rotational speed of the driven shaft detected by the rotation sensing device to be higher than or equal to a predetermined rotational speed according to the reduction ratio. When it is as low as a ratio, it is determined that an abnormal situation is provided, and the brake is operated by causing a current to be supplied to the brake coil.

In addition, the clutch magnetic plate is configured to be horizontally movable in the axial direction, and if the abnormal situation persists for a predetermined time or more, the control unit is characterized in that the clutch magnetic plate is separated from the clutch iron plate by supplying a reverse current to the clutch coil. It is done.

In addition, the clutch iron plate is configured to be horizontally movable in the axial direction, and if the abnormal situation persists for a predetermined time or more, the control unit is characterized in that the clutch iron plate is separated from the clutch magnetic plate by supplying a reverse current to the clutch coil. It is done.

According to the opening and closing automatic door of the present invention, the driving force from the motor is transmitted to the driven shaft via the clutch iron plate and the clutch magnet plate, and when the constant current is supplied to the clutch coil, the clutch iron plate and the clutch magnet plate are more strongly attached to the driven shaft without slipping. Can be transmitted, and thus, power can be transmitted to the door more stably while preventing damage to the motor or gear device. In addition, when an abnormal external force is applied during the rotation of the door, the brake may be operated or power transmission may be blocked to protect the mechanical device and prevent safety accidents.

Hereinafter, the configuration and operation of the preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings. In the drawings, like reference numerals refer to like elements throughout. The same reference numerals in the drawings denote like elements throughout the drawings.

Figure 3 is a perspective view of a driving device of a sliding automatic door according to the present invention. 4 is a schematic cross-sectional view showing a state in which the driving force from the motor is transmitted to the driven shaft in the drive device. 5 is a schematic cross-sectional view showing a state in which the brake is operated while the driving force from the motor is transmitted to the driven shaft in the driving apparatus. 6 is a schematic cross-sectional view showing a state in which the clutch coil and the clutch magnetic plate are separated during the operation of the brake in the driving device to block power transmission from the motor.

The driving device 100 of the automatic door according to the present invention is a motor 10, a reduction gear 20, a clutch iron plate 30, a clutch magnet plate 32, a driven shaft 50, a brake iron plate 40, a brake coil plate 41, a motor power supply unit 11, a clutch coil power supply unit 32, a brake coil power supply unit 43, and a control unit (not shown) for controlling the operation of the components.

When the sensor detects the passage of a person, the control unit sends a driving signal to the motor 10, and the motor 10 rotates to transmit power to the driven shaft 50 to open the door.

The rotation speed of the motor is decelerated by the reducer 20 connected to the drive shaft of the motor 10.

The clutch iron plate 30 is connected to the power transmission shaft 21 of the reducer 20. The clutch iron plate 30 is formed in a disc shape, and a coil (clutch coil) 31 is wound on the outside thereof.

The clutch magnetic plate 32 is a disk-shaped member having magnetic force. Since the clutch magnet plate 32 is attached to the clutch iron plate 30 by magnetic force, the driving force from the motor 10 is transmitted to the clutch magnet plate 32 along the axis. The clutch magnet plate 32 is configured to be horizontally moved by a predetermined interval in the axial direction.

One side of the driven shaft 50 is connected to the clutch magnet plate 32, and the other side is connected to the door to transmit the rotational force of the motor 10 to the door. The driven shaft 50 may change the power transmission direction to 90 ° by means such as, for example, a bevel gear. Depending on the needs of use, the direction of the driven shaft 50 may coincide with the motor shaft, but may be disposed perpendicular to the motor shaft.

The disk shaft brake plate 40 is inserted into the driven shaft 50 to rotate together with the rotation of the driven shaft. The brake plate 40 is configured to be horizontally moved by a predetermined interval in the axial direction.

In addition, a disk-shaped brake coil plate 41 is inserted into the driven shaft 50 so as to be spaced apart from the brake iron plate 40. The brake coil plate 41 is not driven with the driven shaft 50 but is fixedly supported by the fixing part 44. A coil (brake coil) 42 is wound on the outside of the brake coil plate 41.

The motor 10 is supplied with current by the motor power supply unit 11. The clutch coil 31 is connected to the clutch coil power supply unit 32 to supply a constant current or a reverse current. The brake coil 42 is supplied with current by the brake coil power supply 43.

Hereinafter, the operation of the driving device 100 according to the present invention for driving the automatic door will be described.

When the sensor detects the passage of a person, the motor 10 rotates, and the rotation of the motor rotates the reducer 20, the clutch iron plate 30, the clutch iron plate 30, and the clutch magnet plate 32 attached by magnetic force. Passed to the driven shaft (50). As the driven shaft 50 rotates, the door connected to the driven shaft 50 is rotated.

Until the door is opened by about 30 degrees, a strong current flows to the motor 10, and a strong driving force is transmitted to the driven shaft 50. Then, when the current is kept low and the door is opened by about 90 degrees, the motor 10 Will stop. At this time, the rotation sensing device 60 (for example, the encoder) is installed in the driven shaft 50, the rotational speed of the driven shaft 50 can be detected to determine the opening degree of the door. After waiting for a certain time, the motor 10 rotates in reverse, and the door rotates by 90 ° in the opposite direction to close.

When power from the motor 10 is transmitted to the driven shaft 50, the clutch iron plate 30 and the clutch magnet plate 32 remain attached. Since the clutch iron plate 30 and the clutch magnet plate 32 are attached by magnetic force, when the rotational speed of the motor 10 is increased or an external force acts on the door side connected to the driven shaft 50 (for example, the door When there is an obstacle or a strong wind blows in the direction of travel), a sliding phenomenon may occur at the attachment surface of the clutch iron plate 30 and the clutch magnet plate 32.

This sliding phenomenon serves to prevent the motor 10 or the gear device from being damaged by an external force. For example, when a strong external force acts on the driven shaft 50, a sliding phenomenon occurs at the attachment surface of the clutch iron plate 30 and the clutch magnet plate 32 so that the external force is not transmitted to the motor 10 or the gear device. .

However, this sliding phenomenon may be adversely affected when it is desired to transmit a stronger driving force from the motor 10 to the driven shaft 50. In the present invention, the clutch coil 31 is wound on the outside of the clutch iron plate 30 so as to function as an electromagnet. Therefore, when it is necessary to transmit a stronger driving force from the motor 10 to the driven shaft 50, the clutch coil power supply 32 sends a constant current to the clutch coil 31. At this time, the clutch coil 31 becomes an electromagnet to further strengthen the attachment force between the clutch iron plate 30 and the clutch magnet plate 32. Here, the "constant current" refers to the current direction in which the attraction force acts between the clutch iron plate 30 and the clutch magnet plate 32, and the "reverse current" refers to the repulsive force between the clutch iron plate 30 and the clutch magnet plate 32. It refers to the current direction.

As such, when the constant current is supplied to the clutch coil, the clutch iron plate 30 and the clutch magnet plate 32 are more strongly attached to each other and can be transmitted to the driven shaft 50 without slipping, and thus, the motor 10 or the gear device It can transmit power to the door more stably while preventing damage.

Next, the situation in which the brake is operated in the drive device 100 according to the present invention will be described.

When the wind is strongly blown from the outside during the opening of the door, the brake is operated when the rotation speed of the driven shaft 50 measured by the rotation sensing device 60 is higher than the predetermined rotation speed by the reduction ratio. Alternatively, when a person passing from the other side hits the door and the rotational speed of the driven shaft 50 is lower by a predetermined ratio than the normal rotational speed according to the reduction ratio (even when the driven shaft 50 is rotated in the opposite direction to the stop or motor rotation). Is judged to be an abnormal situation, and the brake is operated.

If the controller determines that the abnormal situation, current flows to the brake coil 42 by the brake coil power supply unit 43. In this case, as shown in FIG. 5, the brake coil plate 41 becomes an electromagnet, and the brake iron plate 40 is horizontally moved to the right side and attached to the brake coil plate 41. Since the brake coil plate 41 is fixed to the fixing unit 44 without being driven with the driven shaft 50, the attachment force between the brake iron plate 40 and the brake coil plate 41 is controlled by the brake iron plate 40. It acts to hinder the rotation of the power-driven driven shaft 50. Thus, the rotation of the driven shaft 50 is significantly reduced compared to the rotational speed of the motor 10, and consequently acts as a braking force for the rotation of the door. Even in this case, if the braking force is increased a lot, a sliding phenomenon occurs between the clutch iron plate 30 and the clutch magnet plate 32 as described above, thereby preventing damage to the motor 10 and the gear device.

When the braking force is further increased, power transmission from the motor 10 to the driven shaft 50 may be blocked to prevent damage to the motor 10 and the gear device.

When reverse current flows from the clutch coil power supply part 32 to the clutch coil 31, as shown in FIG. 6, the repulsive force acts between the clutch iron plate 30 and the clutch magnet plate 32, and the clutch magnet plate 32 is horizontal. The clutch iron plate 30 and the clutch magnet plate 32 are separated by retreating in the right direction. When the clutch magnet plate 32 is separated from the clutch iron plate 30, the driving force is not transmitted to the driven shaft 50 even when the motor 10 is rotating. Even in this case, the brake iron plate 40 is still attached to the brake coil plate 41 so that the braking force is applied.

As described above, in the present invention, when an abnormal situation such as abnormal external force is applied while the door is rotated, the brake may be operated or power transmission may be prevented to prevent safety accidents such as damage to parts of the door or injury to a person. have.

Although the clutch magnetic plate 32 is configured to be disposed on the right side of the clutch iron plate 30, the positions of the clutch iron plate 30 and the clutch magnet plate 32 may be configured to be reversed. Further, although the clutch coil 31 is configured to be wound on the outside of the clutch iron plate 30, the clutch coil 31 may be wound on the outside of the clutch magnet plate 32.

In the above, the brake coil plate 41 is disposed on the right side of the brake iron plate 40, but the positions of the brake coil plate 40 and the brake coil plate 41 may be reversed.

Although the clutch magnet plate 32 is configured to be movable in the horizontal direction, the clutch iron plate 30 may alternatively be configured to be movable in the horizontal direction. Although the brake iron plate 40 is configured to be movable in the horizontal direction, the brake coil plate 41 may alternatively be configured to be movable in the horizontal direction.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit and scope of the invention will be.

1 is a view showing an example of a conventional sliding automatic door.

2 is a view showing a state in which a conventional automatic sliding door is operated.

3 is a perspective view of a driving device of a sliding automatic door according to the present invention;

Figure 4 is a schematic cross-sectional view showing a state in which the driving force from the motor is transmitted to the driven shaft in the driving device of the automatic swing door according to the present invention.

5 is a schematic cross-sectional view showing a state in which a brake is operated while a driving force from a motor is transmitted to a driven shaft in a driving device of a sliding automatic door according to the present invention.

Figure 6 is a schematic cross-sectional view showing a state in which power transmission from the motor is blocked by separating the clutch coil and the clutch magnetic plate during operation of the brake in the driving device of the automatic door according to the present invention.

<Explanation of symbols for the main parts of the drawings>

10: motor

11: motor power supply

20: reducer

30: clutch iron plate

32: clutch magnetic plate

33: clutch coil power supply

40: brake iron plate

41: brake coil plate

42: brake coil

43: brake coil power supply

50: driven shaft

60: rotation detection device

Claims (6)

In the driving device of the automatic door opening and closing the door back and forth, motor; A speed reducer connected to the motor to reduce rotation from the motor; A disk-shaped clutch iron plate connected to a power transmission shaft of the reducer and having a clutch coil wound on the outside thereof; A disc-shaped clutch magnet plate attached to the clutch iron plate by a magnetic force to transfer power of a motor; A driven shaft connected to the clutch magnet plate to transmit a rotational force of the motor to the door; A motor power supply unit supplying current to the motor; A clutch coil power supply unit supplying current to the clutch coil; And a control unit for controlling the operation of the components. In the driving device of the automatic door opening and closing the door back and forth, motor; A speed reducer connected to the motor to reduce rotation from the motor; A disc-shaped clutch magnet plate connected to the power transmission shaft of the reducer; A disc-shaped clutch iron plate attached to the clutch magnet plate by a magnetic force to transmit power of a motor, and to which a clutch coil is wound; A driven shaft connected to the clutch iron plate to transmit a rotational force of the motor to the door; A motor power supply unit supplying current to the motor; A clutch coil power supply unit supplying current to the clutch coil; And a control unit for controlling the operation of the components. The brake plate according to claim 1 or 2, further comprising: a disc-shaped brake iron plate inserted into the driven shaft so as to be horizontally movable in the axial direction; A disc-shaped brake coil plate inserted into the driven shaft to be spaced apart from the brake iron plate to be fixed to the fixed part and wound around the brake coil; Further comprising a brake coil power supply for supplying a current to the brake coil, When a current is supplied to the brake coil, the brake iron plate is attached to the brake coil plate by a magnetic force to function as a brake for the rotation of the motor. According to claim 3, further comprising a rotation sensing device for sensing the rotational speed of the driven shaft, The controller determines that an abnormal situation is detected when the rotational speed of the driven shaft detected by the rotation sensing device is higher than or equal to a predetermined ratio or lower by a predetermined ratio according to the reduction ratio, so that a current is supplied to the brake coil. Driving device for a sliding automatic door, characterized in that for operating the brake. The method of claim 4, wherein the clutch magnetic plate is configured to be horizontally movable in the axial direction, If the abnormal situation persists for a predetermined time or more, the control unit causes a reverse current to be supplied to the clutch coil so that the clutch magnetic plate is separated from the clutch iron plate, characterized in that the drive device of the automatic automatic door. The method of claim 4, wherein the clutch plate is configured to be horizontally movable in the axial direction, If the abnormal condition persists for a predetermined time or more, the control unit causes the reverse current is supplied to the clutch coil so that the clutch iron plate is separated from the clutch magnetic plate, characterized in that the drive device of the automatic door.

Images