JPH0972157A - Automatic door opening/closing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily open a door which has stopped on closing. SOLUTION: A door 10 is connected to a roller chain 20 which suspends a main weight 25 and a subweight at both respective ends. The door is pulled by the main weight and automatically closed by paying out the roller chain 20 from a driving sprocket 51. When the door stops on the way, the slack of the roller chain 20 is detected by a slack detector 40 and the driving sprocket 51 stops. The door is opened by pushing the door with a larger force than the main weight 25. When the door is completely closed, the main weight is attracted and fixed by a magnetic lock 30. The door 10 is automatically opened, when the magnetic lock 30 is put off and the driving sprocket 51 is reversely rotated to retract the roller chain 20.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic door opening / closing device suitable for automatically opening and closing a door provided at a gate or the like of an unmanned toll bicycle parking lot.

[0002]

2. Description of the Related Art In an unmanned toll bicycle parking lot, an automatic door is indispensable at its gate. The automatic door is driven to open and close by a motor like other automatic doors. In addition, the gate is automatically monitored by infrared rays or the like in order to prevent an accident in which the user is caught in the door.

[0003]

However, the monitoring device using infrared rays or the like is expensive. Further, even if a large number of expensive monitoring devices are used, it is difficult to completely monitor the entire gate. Therefore, there is a risk that a small child will be caught in the door. If it is caught in a door, the door cannot be opened, and a weak child, an old person, or the like may be caught in the door.

The present invention has been devised in view of the above circumstances, and it is an object of the present invention to provide a safe and economical automatic door opening / closing device that can easily open a door that has been stopped halfway during closing. To aim.

[0005]

SUMMARY OF THE INVENTION An automatic door opening / closing device according to the present invention includes a linear pulling member connected to the door so as to reciprocate in the longitudinal direction when the door is opened and closed, and the door is attached to the pulling member. A weight that is connected to the traction member to apply a load in the opening direction, a magnet lock that attracts and fixes the weight when the door is completely closed, and a door that pulls in and drives the traction member in the door opening direction. Drive means for feeding and driving the pulling member in the closing direction, and control means for detecting the slack amount of the pulling member on the entry side of the driving means and controlling the drive means based on the slack amount. .

A chain or the like can be used as the pulling member. In that case, a motor driven sprocket or the like can be used as the driving means.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a device configuration diagram showing a mechanical configuration of an example of an automatic door opening / closing device embodying the present invention.

The door 10 is a sliding door, and is configured to move to both sides by engaging upper guide wheels 11 and 11 with a guide rail provided on an upper edge portion of the door frame 12. In the figure, the door 10 moves to the right to close the door, and moves to the left to open the door.

The opening / closing device for automatically opening / closing the door 10 includes a roller chain 20 stretched over the door 10. The roller chain 20 as a towing member includes a pair of guide sprockets 2 provided on both sides of the door frame 12.
1, 22 and are connected to the door 10 between the guide sprockets 21 and 22. Therefore, the roller chain 2
The door 10 is closed when 0 is pulled to the right side, and the door 10 is opened when 0 is pulled to the left side.

The roller chain 20 has a main weight 25 at the lower right end and a sub weight 2 at the lower left end.
6 are each hung. Main weight 25
Pulls the roller chain 20 in the direction in which the door 10 closes, and the sub-weight 26 pulls the roller chain 20 in the direction in which the door 10 opens. Below the main weight 25, a magnet lock 30 is provided so that the main weight 25 contacts when the door 10 is completely closed and the main weight 25 descends to the lower end. The sub weight 26 is sufficiently lighter than the main weight 25.

A slack detector 40 and a driver 50 are provided on the left side of the door frame 12. Slack detector 4
0 has a movable sprocket 41. Movable sprockets 4
1 is elastically pressed from the outside to the roller chain 20 between the guide sprocket 22 on the left side and the guide sprocket 23 provided below the guide sprocket 22. The limit switch 42 is operated by moving. The signal is given to the controller 60.

The driving machine 50 has a drive sprocket 51 that engages with the roller chain 20. The drive sprocket 51 is connected to the motor 53 via a clutch 52. The motor 53 also includes a brake 54, and together with the clutch 52 and the brake 54, the controller 60.
Controlled by. A guide sprocket 24 is provided below the drive sprocket 51 in order to wind the roller chain 20 around the drive sprocket 51.

Next, the operation of the opening / closing device will be described. When the door 10 moves to the left and the entrance is completely open, the motor 53 is stopped.

When a command signal for closing the door is given to the controller 60, the motor 53 is driven in a direction to send the roller chain 20 upward. This allows the roller chain 2
0 is pulled by the main weight 25 and moves from left to right between the guide sprockets 21 and 22 to close the door 10. That is, the door 10 is pulled by the weight of the main weight 25 to perform the closing operation. At this time, the slack of the roller chain 20 does not occur between the guide sprockets 22 and 23. In addition, the sub-weight 26 causes the roller chain 2 to
Since 0 is pulled, the roller chain 20 is not tangled at the drive sprocket 51.

When the closing operation is blocked by the obstacle 70 while the door 10 is being closed, the door 10 is stopped halfway. Then, the roller chain 20 starts to loosen between the guide sprockets 22 and 23. When the amount of slack reaches a predetermined value, the limit switch 42 is actuated and the signal is sent to the controller 60. Then, the controller 60 stops the motor 53 and disengages the clutch 52. Motor 53
Is stopped, the delivery of the roller chain 20 by the drive sprocket 51 is stopped.

With the door 10 stopped halfway,
When a force in the opening direction is applied to the door 10, if the force is larger than the weight of the main weight 25, the door 10 opens. That is, even when the door 10 is stopped halfway, the door 10 can be opened by applying a force larger than the weight of the main weight 25.

At this time, the roller chain 20 is sent to the drive sprocket 51, but when the motor 53 is stopped, the clutch 52 is disengaged and the drive sprocket 51 becomes rotatable, so that the roller chain sent to the drive sprocket 51. 20 is pulled smoothly by the sub-weight 26. Therefore, troubles such as the entanglement 29 of the roller chain 20 can be reliably avoided. Here, the sub-weight 26 is the main weight 2
If it is heavier than 5, when the clutch 52 is disengaged, the door 10
Opens on its own. If the sub-weight 26 is too light,
Roller chain 2 between the guide sprockets 22 and 23
0 will eliminate the slack.

When the obstacle 70 is removed, the roller chain 20 is strongly pulled rightward by the main weight 25 again, and the slack of the roller chain 20 between the guide sprockets 22 and 23 is eliminated, so that the motor 53 restarts the operation. Then, the feeding of the roller chain 20 starts.

When the door 10 is completely closed, the roller chain 20 is loosened again between the guide sprockets 22 and 23, and the feeding of the roller chain 20 by the motor 53 is stopped. Further, the main weight 25 comes into contact with the magnet lock 30, and the magnet lock 30 operates according to an instruction from the controller 60. As a result, the main weight 25 is attracted and fixed to the magnet lock 30. Therefore, when the door 10 is completely closed, the door 10 cannot be opened. However, when a power failure occurs, the magnet lock 30 is turned off and the main weight 25 is released, so that the door 10 can be freely opened.

When a door opening command signal is given to the controller 60, the motor 53 is driven in a direction to pull the roller chain 20 downward. This allows the roller chain 2
0 moves from the right to the left between the guide sprockets 21 and 22 to open the door 10. Also at this time, the roller chain 20 is smoothly pulled downward by the sub-weight 26 and flows.

The automatic door opening / closing device according to the present invention can be applied not only to sliding doors but also to double doors and shutter type doors. Further, the driving means of the roller chain 20 may be a winding type.

[0022]

As described above, the automatic door opening / closing apparatus according to the present invention is constructed such that the linear pulling member is pulled by the weight when the door is closed, and the pulling member is forcibly pulled when the door is opened. Therefore, the door can be easily opened when it is stopped halfway when it is closed, which is highly safe. Since the weight is attracted and fixed by the magnet lock when the door is completely closed, the door cannot be opened without permission in the completely closed state. Therefore, it can be used for unmanned paid bicycle parking lots, etc., and enables reliable storage. Since the function of the magnet lock stops at the time of power failure, there is the convenience that the door can be opened manually at this time.
Since it is not necessary to use a monitoring device using infrared rays or the number thereof can be reduced, it is excellent in economic efficiency.

[Brief description of drawings]

FIG. 1 is a device configuration diagram showing a mechanical configuration of an example of an automatic door opening / closing device embodying the present invention.

[Explanation of symbols]

 10 Door 20 Roller Chain (Tracting Member) 25 Main Weight 26 Sub Weight 30 Magnet Lock 40 Looseness Detector 50 Drive Machine 51 Drive Sprocket 52 Clutch 53 Motor 60 Controller 70 Obstacle

Claims (3)

[Claims] 1. A linear traction member connected to the door so as to reciprocate in the longitudinal direction when the door is opened and closed, and a traction member connected to the traction member so as to apply a load in a direction of opening the door. A weight, a magnet lock for adsorbing and fixing the weight when the door is completely closed, and a drive means for pulling and driving the towing member in the direction of opening the door and sending out and driving the towing member in the direction of closing the door. An automatic door opening / closing apparatus, comprising: a control means for detecting a slack amount of the pulling member on the entry side of the driving means and controlling the driving means based on the slack amount. 2. The automatic door opening / closing device according to claim 1, wherein the weight is attached to one end side of the traction member, and a sub-weight which is lighter than the weight is attached to the other end side. 3. The automatic door opening / closing apparatus according to claim 2, wherein a clutch for releasing the driving member engaging with the pulling member when the driving unit is stopped is incorporated in the driving unit.