KR100912440B1 - Apparatus and method for automatically opening and shutting curtains of cars entrance of motel - Google Patents

Abstract

An apparatus for opening and closing the curtain of the motel vehicle entrance door and a method for the same are provided, which prevent the safety accident of collision of a man and a vehicle. An apparatus for opening and closing the curtain of the motel vehicle entrance door comprises: a curtain(10) of which the top is connected; a rotary shaft(40) installed between the both side walls(21) of the gateway(20); a car sensor sensing the vehicles coming in and out the gateway; a drive unit(70) which rotates the rotary shaft in the forward direction or the reverse direction and which winds up the curtain or loosens it; and a controller controlling the drive unit according to the signal sensed from the car sensor.

Description

{Apparatus and method for automatically opening and shutting curtains of cars entrance of motel}

The present invention relates to a motel vehicle door curtain automatic opening and closing device and its automatic opening and closing method, and more particularly, when a vehicle enters a motel building from outside or a motel building from an exterior of a motel consisting of a plurality of long rectangular curtain split pieces. Automatic opening and closing of the motel vehicle door opening and closing device that allows the driver to enter and leave the motel conveniently without worrying about safety accidents by opening and closing automatically and without malfunction when entering and leaving the motel. And an automatic opening and closing method thereof.

In general, the motel's doors are covered with curtains that protect the privacy of the occupants and simply hide the inside from the outside so that the vehicle can enter and exit easily.

That is, as shown in Figs. 1 and 2, the curtain 10 installed in the doorway 20 is a plurality of divided pieces of flexible long rectangular shape generally hanging in the vertical direction between the two side wall (21). It is made up of 11 rooms and is of a shape and color that match the moist and cozy atmosphere of the motel. Because of the curtain 10, the inside of the motel cannot be seen from the outside, thereby protecting the privacy of the motel.

In addition, the curtain 10 installed in the doorway 20 can be easily and quickly entered into the interior of the motel building because the curtain 10 can be lifted up by hand when entering on foot. It is also very convenient because you can get in and out of the motel by car.

However, when a person walks in and out of the doorway 20 provided with the curtain 10, the doorway can be accessed without any problem, but when the driver enters and exits the motel doorway 20 while riding in a vehicle, the driver is in the front of the vehicle. There is a risk of a safety accident because you can not look at.

That is, when entering the motel, as shown in FIG. 2, the curtain 10 is covered as it is without looking inside the motel, so that there is a possibility that the person inside the motel may collide with the vehicle. In addition, when the vehicle comes out of the motel, there is a risk of collision with people and vehicles passing by the motel. For example, the vehicle exiting the motel must first pass through the doorway 20 without knowing the situation ahead, in which case it is very likely to collide with the motel and the passing vehicle.

In addition, there is a problem in that the driver feels a mental burden momentarily when entering and leaving the motel while riding a vehicle due to such a collision fear.

A device for automatically opening and closing a door that does not use the curtain 10, such as a conventional motel door, is disclosed in Utility Model Registration No. 0378596. Since this device uses a pressure sensor as a vehicle sensor in front of the door, there is a problem in that it requires a lot of manufacturing cost, such as installation on the floor and wiring in the ground. Since the vehicle cannot be detected in advance from the inside to the outside, there is a problem that it is very difficult to apply the device to the motel door where the curtain 10 composed of a plurality of split pieces 11 is struck.

In addition, the pressure sensor installed in front of the door has a problem that occurs by generating a detection signal by the external vehicle, the moon and the like passing in front of the door.

The present invention was created to solve the problems of the conventional motel doorway, the object of the present invention is to enter the doorway of the motel while entering the doorway of the motel while riding a vehicle to enter the doorway in a state where the visibility is secured It is to provide a motel vehicle door curtain automatic opening and closing device and its automatic opening and closing method so that a safety accident that does not collide with a person or a vehicle does not occur and thus do not feel the mental burden of the driver.

Still another object of the present invention is to prevent the door from being opened or closed by malfunction due to an animal such as a person or dog passing by the front door of the motel, and an external vehicle, and the curtain even when the split piece of the motel door curtain is bent by the wind. The present invention provides a motel vehicle door curtain automatic opening and closing device and a method of automatically opening and closing the door, in which a malfunction does not occur due to an abnormality of a detection signal caused by the warp of the divided pieces.

It is another object of the present invention to provide a motel vehicle door curtain automatic opening and closing device and an automatic opening and closing method which can detect a case in which the production cost is low and the color of the vehicle is any color.

The motel vehicle door curtain automatic opening and closing device of the present invention for achieving the above object is a rotation sensor which is connected to the upper end of the curtain and installed between both walls of the doorway, and a vehicle detection sensor for detecting the vehicle entering and exiting the doorway. And a driving device for winding the curtains up or down by rotating the rotary shaft in a forward or reverse direction, and a control unit for controlling the driving device according to a signal detected from the vehicle detection sensor. The curtain consists of a plurality of rectangular long pieces; The vehicle detection sensor is a sensor using an ultrasonic wave is provided on both the left and right sides of the front, rear of the upper cross connecting the two walls of the entrance and exit; The vehicle detection sensor on one side of each of the front and rear of the cross is a long detection distance sensor installed to detect a long distance object, and the other vehicle detection sensor is a short detection distance sensor installed to detect a short distance object. .

In the motel vehicle door curtain automatic opening and closing device of the present invention, a plurality of protrusions are uniformly arranged in the circumferential direction, and the target portion fixed to one end of the rotating shaft, and the degree of rotation of the target portion by irradiating infrared rays to the protrusions of the target portion. And a counter switch equipped with an infrared proximity sensor for counting the control unit to detect the degree of rotation of the rotating shaft.

The motel vehicle door curtain automatic opening and closing method of the present invention for achieving the above another object is a rotary shaft that is connected between the upper end of the curtain consisting of a plurality of rectangular long pieces and installed between both walls of the doorway, It detects the lifting vehicle using ultrasonic waves, and is installed at both the left and right sides of the front cross and the rear side of the upper cross connecting the walls of both sides of the doorway. The sensors on each side of the front and rear of the cross are installed to detect a long distance object. Long sensing distance sensor and the other sensor is a plurality of vehicle detection sensor consisting of a short sensing distance sensor is installed so that the sensing distance is short, and a drive device for winding up or down the curtain by rotating the rotary shaft in the forward or reverse direction, and the Controlling the driving device according to a signal detected from a vehicle detection sensor; With a fisherman, when the vehicle enters the motel through the doorway, the control unit controls the driving device when the detection signal is input from the long sensing distance sensor and the short sensing distance sensor on the front of the cross to rotate the rotating shaft forward to open the curtain. Lift up and open the doorway, and then when the sensing signal is input from the long sensing distance sensor and the short sensing distance sensor on the back of the cross, and the input of the sensing signal is released, the driving device is controlled to rotate the rotating shaft to reverse the curtain. Descend to close the doorway; On the contrary, when the vehicle exits the motel through the entrance and exit, the control unit controls the driving device when the detection signal is input from the long sensing distance sensor and the short sensing distance sensor at the rear of the cross, and rotates the rotation shaft forward to raise the curtain. When the sensing signal is input from the long sensing distance sensor and the short sensing distance sensor on the front of the cross, and the input of the sensing signal is released, the driving device is controlled to reverse the rotating shaft to close the entrance by lowering the curtain. It is characterized by.

In the motel door curtain automatic opening and closing method of the present invention, a plurality of projecting pieces are uniformly arranged in the circumferential direction, and the target part fixed to one end of the rotating shaft and the projecting piece of the target part are irradiated with infrared rays to improve the degree of rotation of the target part. A counter switch equipped with an infrared proximity sensor for counting is provided, wherein the control unit detects the degree of rotation of the rotating shaft according to a signal from the counter switch, and stops the operation of the driving device.

According to the motel vehicle door curtain automatic opening and closing method and the automatic opening and closing method of the present invention, when the entrance and exit of the curtained motel, the curtain is automatically rolled up and the curtain is returned to its original position after passing through the vehicle. Therefore, when entering and exiting the motel entrance while riding a vehicle, the front view is secured so that the driver can safely enter and leave the vehicle without feeling the burden of having a person or vehicle in front of him. Can go through the motel entrance.

In addition, according to the present invention, the vehicle sensor has a sensor for detecting a long distance object and a sensor for detecting a relatively short distance object to operate the driving device only when the two sensors detect the object to pass the front door of the motel door The door is not opened or closed by malfunction due to animals such as people, dogs, or external vehicles.

According to the present invention, even when the split piece of the curtain is bent by the wind, the split piece is not bent to the extent that the split piece is detected by the far sensing distance sensor, which is a vehicle detection sensor, so that no malfunction occurs even when the split piece of the curtain is bent.

The present invention also has an advantage that the manufacturing cost is lower than that of using other sensing means because the ultrasonic sensor is used as the vehicle detecting sensor, and the color of the vehicle can be detected in any color.

Hereinafter, the present invention will be described in more detail with reference to the accompanying drawings.

Figure 3 is a schematic front view showing a state of the motel vehicle door curtain automatic opening and closing device installed in the door curtain according to the present invention, Figure 4 is an enlarged view showing the action of the rotation axis rotation degree detecting device of the motel vehicle door curtain automatic opening and closing device in FIG. 5 is an enlarged front view illustrating an operation of a rotation shaft rotation degree detecting device of another embodiment of the motel vehicle door curtain automatic opening and closing device according to the present invention, and FIG. 6 is an enlarged view of the rotation shaft rotation degree detecting device of another embodiment of FIG. 5. 7 is a block diagram of a control device of a motel vehicle door curtain automatic opening and closing device according to the present invention.

8 is a flowchart showing a control state of the motel vehicle door curtain automatic opening and closing device according to the present invention, and FIG. 9 is a state in which the vehicle enters into the motel through the motel door installed with the automatic door curtain opening and closing device according to the present invention. 10 is a side view illustrating a state in which a vehicle enters into a motel through a motel door installed with an automatic door curtain opening and closing device according to the present invention, and FIG. 11 is a motel with an automatic door curtain opening and closing device according to the present invention. A plan view showing a detection state of an external vehicle passing through the front door.

As shown, the motel vehicle door curtain automatic opening and closing device of the present invention is connected to the upper end of the curtain 10 and the rotary shaft 40 is installed between the two walls 21 of the doorway 20 and the doorway ( Vehicle detection sensor for detecting the vehicle entering and exiting 20, the drive unit 70 for winding up or unwinding the curtain 10 by rotating the rotary shaft 40 in the forward or reverse direction, and detected from the vehicle detection sensor The control unit 90 for controlling the drive device 70 in accordance with the signal.

The curtain 10 is composed of a plurality of rectangular long pieces 11, if the upper end of the curtain 10 is connected to the rotating shaft 40, when the doorway 20 is closed, the lower end of the curtain 10 It is preferable to descend to a height of up to about 50 cm from the ground, and to roll the lower end of the curtain 10 up to about 1.5 m from the ground when the doorway 20 is opened.

And when the curtain 10 is unwinded, it may be to have an appropriate weight on the lower end of the curtain 10 so that the curtain 10 can be smoothly lowered.

The rotating shaft 40 is formed by the rotating shaft main body 43 and the extended shaft 42 fixed to the both sides, respectively.

End portions of the extension shafts 42 on both sides are respectively installed in the bearings 110 installed on the main bracket 30, and one extension shaft 42 on one side is one component of the rotation degree sensing means of the rotation shaft 40. Rotating screw 60 is connected. Touch nut 61 is screwed to the rotating screw 60, the touch nut 61 is to be moved to the left and right by the guide piece 31, the guide piece 31 is the main bracket 30 It is fixed at.

In addition, the limit switches 80 and 80 ′ are provided on the left and right sides of the touch nut 61 so that the touch nut 61 may be in contact with each other while reciprocating.

One side of the extension shaft 42 is provided with a sprocket 41 which is rotated by the operation of the drive motor 71 to rotate forward and reverse. The other end of the extension shaft 42 on the other side is provided to rotate on the bearing 110 provided on the main bracket 30 on the other side.

The chain 100 is connected between the sprocket 71a of the drive motor 71 and the sprocket 41 of the extension shaft 42.

The main brackets 30 on both sides are fixed to both side walls 21 of the entrance and exit 20 of the motel.

5 and 6 show another embodiment of the rotation axis rotation degree detection device. In this embodiment, the rotating shaft rotational degree sensing device includes a target portion 81 having a plurality of protrusions 81a uniformly disposed in the circumferential direction and fixed to one end of the rotating shaft 40, and the target portion 81 of the target portion 81. It consists of a counter switch 82 equipped with an infrared proximity sensor for irradiating infrared rays to the projecting piece (81a) to count the degree of rotation of the target portion (81). The protruding pieces 81a of the target portion 81 are uniformly disposed in the circumferential direction, and the larger the number of the protruding pieces 81a is, the more accurate the degree of rotation can be detected. In this embodiment, the number of the protruding pieces 81a is set to four, so that the rotation of the rotation shaft 40 can be accurately detected up to a quarter of a turn.

The vehicle detection sensor is a sensor using ultrasonic waves, which are respectively installed on both the left and right sides of the front and rear of the upper cross connecting the two side walls 21 of the entrance and exit 20, and the vehicle detection on each side of the front and rear of the cross. The sensor is a long sensing distance sensor 51, 53 installed to detect a long distance object, and the other vehicle sensing sensor is a short sensing distance sensor 52, 54 installed to detect a short distance object.

Since the vehicle detection sensor uses an ultrasonic sensor, all vehicles can be detected regardless of the color of the vehicle, and an object that is relatively far from the door can be detected.

As shown in FIG. 9, the long sensing distance sensors 51 and 53 on one side and the short sensing distance sensors 52 and 54 on the other side, which are respectively installed on both the left and right sides of the upper cross and the upper cross, are spaced apart from each other. The distance is appropriately about 2m considering the left and right width of the vehicle.

As shown in FIG. 10, the long sensing distance sensors 51 and 53 are capable of sensing an object at a relatively long distance, specifically, an object at a distance of about 2.4 m from the curtain 10. Detect. The short sensing distance sensors 52 and 54 are configured to detect an object at a relatively close distance, specifically, an object at a distance of about 1 m from the curtain 10.

As shown in FIGS. 4 and 5, the driving device 70 includes a sprocket 41a installed at an extension shaft 42 on one side and a sprocket 71a connected to a chain 100 by a forward and reverse rotation drive provided at a central shaft. It is provided with the motor 71, and is firmly fixed to the main bracket 30 of one side.

Accordingly, as the sprocket 71a rotates and the sprocket 71a is rotated by the operation of the forward and reverse drive motor 71, the sprocket 41 and the extension shaft 42 on one side rotate, and at the same time, the rotation shaft 40 ) And the other side of the extension shaft 42 is rotated so that the curtain 10 is wound on the rotating shaft 40 or unwound again to come down to its original position.

The motel vehicle door curtain automatic opening and closing device of the present invention configured as described above operates as follows.

First, a case in which the vehicle enters into the motel through the doorway 20 will be described with reference to FIGS. 7 to 10. When the vehicle is in front of the motel vehicle entrance door, the long sensing distance sensor 51 and the short sensing distance sensor 52 installed on the front of the cross detect this. As shown in FIG. 9, when the vehicle enters the motel door while driving on the road, the vehicle turns right so that the long sensing distance sensor 51 is installed far from the vehicle installed in front of the cross of the door, and the short sensing distance sensor is located near. If 52 is installed, both front sides of the vehicle are simultaneously detected by two sensors.

The control unit 90 operates by controlling the driving device 70 when a sensing signal is input from the long sensing distance sensor 51 and the short sensing distance sensor 52 on the front surface of the cross.

That is, the drive motor 71 is operated. When the drive motor 71 is operated, the sprocket 71a is rotated in the forward direction, and the chain 100 rotates and the sprocket 41 rotates according to the rotation of the sprocket 71a. Done. Accordingly, the extension shaft 42 and the rotation shaft 40 also rotate in the forward direction, and the curtain 10 is wound up while being wound on the rotation shaft 40 to open the doorway 20.

In this case, the degree of forward rotation of the rotating shaft 40 is sensed by the counter switch 82, and when rotated by a predetermined number of revolutions, the control unit 90 stops the operation of the drive motor 71 to act to raise the curtain 10. Stop it. At this time, the lower end of the curtain 10 is about 1.5m from the ground.

When the vehicle passes through the doorway 2, the sensing signal is input to the control unit 90 from the long sensing distance sensor 53 and the short sensing distance sensor 54 at the rear of the cross, and the sensing signal is inputted when the vehicle continues to move forward. It doesn't work. At this time, the controller 90 determines that the vehicle has completely passed through the doorway 20 and controls the driving device 70 to reversely rotate the rotating shaft 40 to lower the curtain 10 to close the doorway 20. .

In this case, the degree of reverse rotation of the rotating shaft 40 is sensed by the counter switch 82, and when the predetermined rotation is rotated, the controller 90 stops the operation of the driving motor 71 so that the curtain 10 descends. Stop the operation. At this time, the lower end of the curtain 10 is about 0.5m from the ground.

Next, a case where the vehicle inside the motel exits to the outside of the motel through the doorway 20 will be described.

When the vehicle approaches the rear of the vehicle entrance from the inside of the motel, a sensing signal is input to the controller 90 from the long sensing distance sensor 53 and the short sensing distance sensor 54 at the rear of the cross. Activate 70.

The drive motor 71 is operated to rotate the rotating shaft 40 forward to lift the curtain 10 upward to open the doorway 20. Similarly, the degree of forward rotation of the rotating shaft 40 is sensed by the counter switch 82, and when rotated by a predetermined number of revolutions, the control unit 90 stops the operation of the drive motor 71 to act to raise the curtain 10. Stop it.

When the vehicle passes through the doorway 20 and completely exits, the sensing signal is input from the long sensing distance sensor 51 and the short sensing distance sensor 52 in front of the cross, and then the input of the sensing signal is released. At this time, the control unit 90 controls the driving device 70 to rotate the rotating shaft 40 in reverse to lower the curtain 10 to close the entrance 20.

In this case, the degree of reverse rotation of the rotating shaft 40 is sensed by the counter switch 82, and when the predetermined rotation is rotated, the controller 90 stops the operation of the driving motor 71 so that the curtain 10 descends. Stop the operation.

As described above, according to the present invention, when the vehicle enters the motel through the doorway 20 or vice versa, the curtain 10 installed in the doorway 20 is automatically raised so that the driver can see the front view. As you move forward from the secured state, you can safely enter and exit the motel, without fear of colliding with people or other vehicles, and allowing the driver to comfortably pass through the motel entrance.

In the present invention, when two objects are simultaneously detected by two vehicle sensors, the vehicle is determined to be a vehicle. However, even if a person or an animal passes by the vehicle, the curtain 10 is not opened due to a malfunction. In addition, even if the split piece 11 of the curtain 10 is bent by the wind is not bent enough to be detected by the long sensing distance sensor 51, 53, even if the curtain 10 malfunctions due to wind none.

In addition, the present invention uses the short distance sensors 52 and 54 so that the vehicle can be detected by approaching the door. Thus, even when the vehicle passes in front of the motel door as shown in FIG. Do not open the curtain 10.

The present invention also uses an ultrasonic sensor as a vehicle detection sensor, so the manufacturing cost is lower than that of other sensing means such as a pressure sensor that needs to be dug and installed. It can also be detected.

Although the present invention has been described in detail only with respect to the described embodiments, it will be apparent to those skilled in the art that various changes or modifications can be made within the spirit and scope of the present invention, and such changes or modifications are therefore appended to the appended patents. Will have to belong to the claims.

1 is a state of the driver's field of view is difficult to secure by a curtain installed in a conventional motel door curtain viewed from the front door curtain,

2 is a schematic side view showing a state in which a vehicle is partially entered toward a motel building in a conventional motel door;

Figure 3 is a schematic front view showing a state in which the motel vehicle door curtain automatic opening and closing device according to the present invention is installed on the door curtain,

Figure 4 is an enlarged front view showing the action of the rotation axis rotation degree detecting device of the motel vehicle door curtain automatic opening and closing device in FIG.

Figure 5 is an enlarged front view showing the action of the rotation axis rotation degree detecting device of another embodiment of the motel vehicle door curtain automatic opening and closing device according to the present invention,

Figure 6 is an enlarged perspective view of a rotation shaft rotation degree detecting device of another embodiment of the motel vehicle door curtain automatic opening and closing device according to the present invention,

Figure 7 is a block diagram of a control device of the motel vehicle door curtain automatic opening and closing device according to the present invention,

8 is a flow chart showing a control state of the motel vehicle door curtain automatic opening and closing device according to the present invention,

9 is a plan view illustrating a state in which a vehicle enters into the motel through a motel door that has an automatic door curtain opening and closing device according to the present invention;

10 is a side view illustrating a state in which a vehicle enters into a motel through a motel door installed with an automatic door curtain opening and closing device according to the present invention;

FIG. 11 is a plan view illustrating a sensing state of an external vehicle passing through the front door of a motel door where an automatic door curtain opening and closing device according to the present invention is installed.

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

10 curtain 11 divided pieces

20: doorway 21: wall

30: main bracket 31: guide

40: rotation shaft 41, 71a: sprocket

42: extension shaft 43: rotation shaft body

51, 53: long sensing distance sensor 52, 54: short sensing distance sensor

60; Rotating Screw 61: Touch Nut

70 drive device 71 drive motor

80, 80 ': limit switch 81: target portion

81a: protrusion 82: counter switch

90: control unit 100: chain

110: bearing

Claims (4)

The rotary shaft 40 is connected between the upper end of the curtain 10 and installed between the two side walls 21 of the doorway 20, a vehicle detection sensor for detecting a vehicle entering and exiting the doorway 20, the rotation shaft Driving device 70 for winding or unwinding curtain 10 by rotating 40 in a forward or reverse direction, and a controller 90 for controlling the drive device 70 according to a signal detected from the vehicle detection sensor. In the motel door curtain automatic opening and closing device comprising: The curtain 10 is composed of a plurality of rectangular long pieces; The vehicle detecting sensor is a sensor using ultrasonic waves, which are respectively spaced apart from each other on the left and right sides of the front and rear of the upper cross connecting the two side walls 21 of the entrance and exit 20, and one side of each of the front and rear of the cross. Vehicle detection sensor is a long detection distance sensor (51) (53) installed to detect a long distance object and the other vehicle detection sensor is a short detection distance sensor (52) (54) installed to detect a short distance object. Motel vehicle door curtain automatic opening and closing device. 2. A target portion 81 according to claim 1, wherein a plurality of protrusion pieces 81a are uniformly arranged in the circumferential direction and fixed to one end of the rotating shaft 40, and a protrusion piece of the target portion 81. 81a) is provided with a counter switch 82 equipped with an infrared proximity sensor for counting the degree of rotation of the target portion 81 by irradiating the infrared ray so that the control unit 90 detects the rotational accuracy of the rotation shaft 40 Motel vehicle door curtain automatic opening and closing device. The upper end of the curtain (10) consisting of a plurality of rectangular long pieces (11) is connected to the rotating shaft 40 which is installed between the two walls 21 of the doorway 20, and exits the doorway (20) It detects the lifting vehicle using ultrasonic waves, and is installed on both the left and right sides of the front cross and the rear side of the upper cross connecting the two side walls 21 of the doorway 20, and the sensor on each side of the front and rear of the cross. Is a long sensing distance and the other sensor is a plurality of vehicle detecting sensors having a short sensing distance, the driving device 70 for winding up or unwinding the curtain 10 by rotating the rotary shaft 40 in the forward or reverse direction, and the In the motel door curtain automatic opening and closing method having a control unit 90 for controlling the drive device 70 according to a signal detected from a vehicle detection sensor, When the vehicle enters the motel through the doorway 20, the control unit 90 drives the driving device 70 when sensing signals are input from the long sensing distance sensor 51 and the short sensing distance sensor 52 in front of the cross. To rotate the rotating shaft 40 forward to lift the curtain 10 upward to open the doorway 20, and then detect signals from the long sensing distance sensor 53 and the short sensing distance sensor 54 at the rear of the cross, respectively. When the input signal is released and the detection signal is released, the driving device 70 is controlled to rotate the rotating shaft 40 in reverse to lower the curtain 10 to close the doorway 20; On the contrary, when the vehicle exits the motel through the doorway 20, the control unit 90 drives the driving device 70 when the detection signals are input from the long sensing distance sensor 53 and the short sensing distance sensor 54 at the rear of the cross. ) By rotating the rotary shaft 40 forward to lift the curtain 10 upward to open the doorway 20, and then detecting signals from the long sensing distance sensor 51 and the short sensing distance sensor 52 in front of the cross, respectively. Is input and the input of the detection signal is released, the door door curtain automatic, characterized in that by controlling the drive device 70 to rotate the rotating shaft 40 to rotate the curtain 10 down to close the doorway 20 How to open and close. 4. The target portion 81 according to claim 3, wherein the plurality of protrusions 81a are uniformly arranged in the circumferential direction and fixed to one end of the rotation shaft 40, and the protrusions of the target portion 81. A counter switch 82 equipped with an infrared proximity sensor for irradiating infrared rays to 81a) to count the degree of rotation of the target portion 81, wherein the controller 90 is controlled by a signal from the counter switch 81; Method for automatically opening and closing the motel vehicle door curtain, characterized in that to stop the operation of the drive device 70 by detecting the degree of rotation of the rotary shaft (40).

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