JP2746342B2 - Safety light device for automatic door - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a driving means for an automatic door,
The present invention relates to a safety light device for an automatic door that outputs a command signal for reciprocating the automatic door by interrupting a light beam.

[0002]

2. Description of the Related Art Conventionally, as a safety light beam device for an automatic door, for example, one shown in FIG. 4 is known. This automatic door 31 is hung by a bracket with wheels on a rail at the upper edge of the building opening 32, and pushbuttons 33a,
When 33b is pressed, a command signal is sent to the control unit 37 in the wall 35 on the door pocket side via the flexible cable 34,
The automatic door 31 is pulled into the wall 35 via a pulley, a belt (not shown) and the bracket, and the opening 32 is opened.
Opens. On the other hand, the above-mentioned safety light beam device is
The light emitters 38, 38 are provided at an appropriate height at the opening end of the door and emit light horizontally, and the light receivers 39, 39 provided at the opening end of the wall 35 on the door pocket side so as to receive the light.
Consists of Then, a control unit (not shown) in the wall 35
When the push button 33 is pressed, the door is fully opened. On the other hand, when the light receiving signal of the light receiver 39 is temporarily interrupted by the passage of a person or an object while the door is fully opened, or when the light receiving signal is similarly temporarily interrupted during the closing of the door, the door is once fully opened. Operate.

[0003]

However, in the above-mentioned conventional safety light device, the light emitting devices 3 are provided on both sides of the door 31 of the opening 32.
8 and the light receiver 39, and when the light beam is opened,
The push button 33 for opening the door has to be separately provided on the automatic door 31 because it merely detects the passage of an object. Therefore, there was a disadvantage that the door device became expensive. The push button 3 in the automatic door 31 which is a movable part
Since the flexible cable 34 connects the control unit 3 and the control unit in the wall 35 which is a stationary unit, the connection structure becomes complicated, and the automatic door 31 cannot be opened due to disconnection of the cable 34. There was also a problem.

Accordingly, an object of the present invention is to detect the passage of a light beam emitted from a single light-emitting device when a door is opened by devising the arrangement of the light-emitting device and the light-receiving device and the structure of the light path. Not only can it be used for opening instructions,
It is an object of the present invention to provide a durable safety light device for an automatic door that can reduce the manufacturing cost of the door device and can reliably open and close the automatic door.

[0005]

In order to achieve the above object, a safety light device for an automatic door according to the present invention is provided on an automatic door which is reciprocated by a driving means so as to protrude and retract from the inside of a wall into an opening of the wall. A safety light beam device for an automatic door that outputs a command signal to move the automatic door forward or backward by intercepting the light beam, wherein a through-hole is provided through the automatic door and parallel to the reciprocating direction of the automatic door. A light emitter provided in one wall of the opening and emitting a light beam coincident with the central axis of the through hole; and receiving the light beam passing through the through hole in the other wall of the opening. A light receiver provided so as to be able to, a light beam temporary blocking unit provided to block the light beam only while the user is operating the automatic door, an output signal of the light receiver and the automatic door. The driving means based on the open / close state Characterized by comprising a control unit for outputting a command signal.

The light beam temporary blocking portion is a push button provided on one surface of the automatic door such that a tip portion protrudes outward, and the through hole faces the one surface of the automatic door. The automatic door may be closed to prevent the user from approaching, while the automatic door is opened toward another side of the automatic door so that the user approaches the automatic door so as to block the light beam. In addition, the wall or the automatic door corresponding to the path of the light beam reaching the light receiver, provided with a light beam blocking unit that continues to block the light beam by the operation of the user, the control unit,
A command signal for keeping the automatic door open when the output signal of the light receiver continues to be cut off may be output to the driving means.

[0007]

First, in a state where the automatic door closes the opening of the wall, the light emitted from the light emitter in one wall of the opening is
Light is received by a light receiver in the other wall of the opening through a through hole provided in the automatic door in parallel with the reciprocating direction, and a light reception signal is sent from the light receiver to the control unit. At this time, when the user operates the light beam temporary blocking unit of the automatic door, the light beam is blocked only during the operation, and the control unit is driven based on the temporary blocking of the received light signal and the automatic door being closed. A command signal for returning the automatic door to the means is output, and as a result, the automatic door is opened so as to be immersed in the wall, and the opening is fully opened. Next, when the opening is fully opened, for example, the control unit starts timing for a certain period of time from the time of full opening, and if there is no temporary interruption of the received light signal during the timing, when the timing ends, during the timing. If the light receiving signal is temporarily interrupted by a person passing through the opening, when the re-counting of the fixed time from the time of the temporary interruption is completed, a command signal for causing the driving means to move the automatic door forward is output. As a result, the automatic door closes so as to protrude into the opening, and completely closes the opening.

As described above, a single light emitting device and a single light receiving device are provided in both side walls of the opening so as to always penetrate the automatic door, and the light beam emitted from the light emitting device is temporarily blocked by the light beam provided in the automatic door. Since the shutter is blocked and a door opening command is obtained, the manufacturing cost can be reduced by unifying the light beam unit.In addition, there is no movable part in the command signal transmission path in the wall where the photodetector is stationary, so disconnection occurs. The door opening / closing failure due to the like is eliminated.

Here, the light beam temporary blocking portion is a push button provided on one side of the automatic door so as to be urged so that a tip portion protrudes outward, and the through hole is formed as the push button of the automatic door. If the automatic door is closed toward one side and cannot be accessed by the user, while the automatic door is open toward another side and the user can approach the automatic door so as to block the light beam, When the push button is pressed from one side of the closed automatic door, the emitted light from the light emitter is temporarily blocked, and while the automatic door is fully opened, when the user touches another side of the closed door, The emitted light is temporarily blocked, and the automatic door is fully opened without pressing the push button. Therefore,
For example, if one side of the automatic door is a passenger compartment of a vehicle that is crowded with people, and another side is a connection part of a vehicle with few people, while the function of the automatic door is exerted, the push button is omitted and the light beam device is omitted. Manufacturing costs can be further reduced.

[0010] Further, the wall or the automatic door corresponding to the path of the light beam reaching the light receiving device is provided with a light beam blocking portion for continuously blocking the light beam by the operation of the user, and the control portion is provided with an output signal of the light receiving device. When the disconnection state is maintained, if the command signal for keeping the automatic door open is output to the driving means, when the user operates the light blocking unit, the emitted light from the light emitter continues to be blocked. Then, since the output signal from the light receiver continues to be cut off, the control unit sends a command signal to the driving means to keep the automatic door open. Therefore, for example, when the automatic door is located between the cabin of the vehicle and the connecting portion, the inspection work, cleaning, and the like can be easily performed while the automatic door is kept open.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the illustrated embodiments. FIG. 1 is a horizontal sectional view showing an example of a safety light beam device for an automatic door according to the present invention. The automatic door 1 has a door pocket side along an upper edge of an opening 32 communicating from a room 2 to another room 3 or outside 3. A bracket with wheels suspends on a rail (not shown) extending to the inside of the wall 35, and the bracket is fixed to a belt stretched on a pulley (not shown) pivotally mounted in the walls 35, 36 at both ends of the rail. 35 is driven forward and reverse by a motor 37 to reciprocate the opening 3
2 is opened and closed.

In the above-mentioned safety light device, holes 4b and 4a provided at the same height at the center of the left and right vertical frames of the automatic door 1 are connected to each other. Handle 1 as shown by the broken line
A through hole 4 consisting of a cylindrical space penetrating horizontally at the position 6;
The wall 36 faces the hole 4a of the right vertical frame of the fully closed automatic door.
The light emitting device 6 is provided slightly inside the hole 5 provided to emit a light beam coincident with the central axis of the cylindrical space, and faces the hole 4b of the left vertical frame of the fully opened automatic door. The light receiver 7 is provided in the wall 35 to receive the light beam, and the spring 9 is urged by the spring 9 so that the tip 8a projects outward at the handle 16 on both surfaces of the automatic door 1. A push button 8 is provided as a light beam temporary blocking unit that blocks a light beam L emitted from the light emitting device 6 only while the passenger is pressing, based on the output signal of the light receiving device 7 and the open / close state of the automatic door 1. The control unit 10 outputs a command signal to the motor 37 as a driving unit.

As shown in FIG. 2 (C), the through hole 4 comprises the interior space of the door 1 in which both the interior 2 and the interior of the separate room 3 or the exterior 3 are closed by the windows 11. On the other hand, as shown in FIG. 1, the push button 8 is formed by a bottom portion 8a of the cylindrical body and an axial slit on the outer periphery of the cylindrical body from the right vertical frame.
(Not shown) and a spring 9 is compressed between a spring receiver 12 projecting into the cylinder, and the spring 9 is attached to the outside so that the flange-shaped stopper 8b of the cylinder comes into contact with the inner surface of the right vertical frame. I'm going. The push button 8 is surrounded by a cylindrical body 13 protruding from the vertical frame so that the push button 8 does not operate only when the passenger hits the body, but only when the passenger pushes it with a finger. As shown in FIG. 2B, a plurality of springs 14 are biased outwardly between the stoppers 8b of the push buttons 8 so as not to block the light beam from the hole 4a of the vertical frame. Can also be done by contracting Since the connecting portion of the vehicle is not crowded with people, the window glass 11 inside the separate room 3 or outside 3 of the above embodiment is omitted, and when a passenger comes into contact with the window glass 11 on the cabin side, light rays are blocked. As a result, the manufacturing cost can be reduced by omitting the members. As shown in FIG. 2 (D), a light-blocking unit that continuously blocks the light emitted from the hole 5 by pressing the lever 15a from the indoor 2 side into the wall 36 immediately before the light emitter 6. The light shielding cover 15 is provided.

The control section 10 accumulates and counts the pulse signals from the pulse generator of the motor 37, and determines whether or not the count value has reached zero indicating that the door is fully closed and a predetermined maximum value indicating that the door has been fully opened. 1 is determined, and the following command signal is output to the motor 37 based on the determination result and the output signal from the light receiver 7. That is, when the output signal is temporarily interrupted when the control unit 10 determines that the door is fully closed, the control unit 10 applies a drive voltage in the reverse direction to the motor 37 as a return command signal to fully open the automatic door 1. On the other hand, when it is determined that the door is fully opened based on the above count value, a low voltage in the reverse direction is intermittently applied to the motor 37 to prevent the motor from overheating at this fully opened position, and the automatic door 1 is closed. Press against the wall 35. In addition, timing of a predetermined door opening time (for example, 15 seconds) is started simultaneously with the door being fully opened, and if there is no temporary interruption of the output signal during the timing, when the timing is ended, the time is measured during the timing. When the output signal is temporarily interrupted, the door opening time is re-timed from the moment of the temporary shut-off, and when the time is ended, a drive voltage in the forward direction is applied to the motor 37 as a forward movement command signal. Then, the automatic door 1 is moved to the fully closed position with reference to the pulse signal.

The control unit 10 determines whether or not the door is in the closing operation by counting the pulse signal. If the output signal is temporarily shut off during the closing operation, the control of the motor 37 is reversed. A drive voltage in the reverse direction is applied to open the automatic door 1 to the fully open position, and during the opening / closing operation of the door, a predetermined sudden decrease in the pulse appearance rate of the pulse signal detects a foreign object entrainment accompanying the opening / closing operation. Then, during the opening operation, after temporarily stopping the motor 37 (for example, for 5 seconds), a lower driving voltage is applied to open the motor 37 to the fully open position, and during the closing operation, a driving voltage in the reverse reverse direction is applied to the motor 37. Then, it is opened to the fully open position to prevent a problem due to foreign matter entrapment. Further, when the light from the light emitter 6 is continuously blocked by the light-shielding lid 15 and the output signal of the light receiver 7 continues to be disconnected for a predetermined time or longer, the control unit 10 controls the motor 37 until the automatic door 1 is fully opened. After applying the reverse drive voltage to
A low voltage in the reverse direction is intermittently applied, and the automatic door 1 is similarly pressed against the wall 35 at this fully opened position, thereby facilitating cleaning and inspection.

The safety light device for an automatic door constructed as described above operates as follows. First, as shown in FIG. 1 (A), an automatic door 1 is connected to an opening 3 communicating from the room 2 to another room 3 or to the outside 3.
2 is closed, the light emitting device 6 in the wall 36 on the door stop side is closed.
Is passed through the horizontal through hole 4 in the automatic door 1 having both ends of the right and left vertical frame holes 4a and 4b, and is received by the light receiver 7 in the wall 35 on the door pocket side. 7 is input to the control unit 10. At this time, when the user pushes the push button 8 of the door vertical frame with the finger against the spring 9 from the indoor side or another indoor or outdoor, the inner end of the push button 8 temporarily blocks the light beam L, and The unit 10 applies a drive voltage in the reverse direction to the motor 37 based on the temporary interruption of the output signal from the light receiver 7 and the fact that the count value of the pulse signal from the motor 37 indicates that the door is fully closed. The automatic door 1 is opened so as to be immersed in the wall 35, as shown in FIG. Next, when the count value of the pulse signal reaches a predetermined maximum value indicating that the door is fully opened, the control unit 10 intermittently applies a low voltage in the reverse direction to the motor 37 to prevent overheating of the motor at the fully opened position. While pressing the automatic door 1 against a door stop (not shown) in the wall 35, the timer for a predetermined door opening time (for example, 15 seconds) is started.

If no person or object passes through the opening 32 during the time counting of the opening time, and there is no temporary interruption of the output signal from the light receiver 7, when the time counting is completed, If the output signal is temporarily interrupted due to the passage of a person or object during the timekeeping, the count value of the pulse signal becomes The drive voltage in the normal rotation direction is applied to the motor 37 until it becomes zero, and the automatic door 1 is closed to the fully closed position (see FIG. 1A). The control unit 10 detects the closing operation of the automatic door 1 by counting the pulse signal, and when the output signal is temporarily shut off by the passage of a person or an object during the closing operation, the motor 37 , The automatic door 1 is opened to the fully open position in FIG. 1 (B). As a result, passengers passing through the opening are not pinched by the automatic door 1.

Further, the control unit 10 monitors the pulse appearance rate of the pulse signal from the motor 37 during the opening / closing operation of the automatic door 1, and when the pulse appearance rate decreases below a predetermined value, the automatic door 1 detects foreign matter. It is determined that the door has been entangled, and during the opening operation, the motor 37 is temporarily stopped (for example, 15 seconds), and then a lower drive voltage is applied to open the automatic door 1 at a low speed to the fully open position. Then, a drive voltage in the reverse reverse direction is applied to the motor 37 to open the automatic door 1 to the fully open position.
As a result, it is possible to prevent a person or an object from being caught in the door and being injured, or the motor 37 or the like from being broken due to an overload caused by the inclusion of a foreign object. On the other hand, during cleaning and inspection,
(A) The light-shielding lid 1 of the wall 36 adjacent to the fully closed door 1 shown in FIG.
5 is pushed in from the room 2 side, the light emitted from the light emitter 6 is immediately cut off, and the cutoff state is maintained, so that the output signal of the light receiver 7 continues to be cut off.
0, the motor 37 is controlled in the same manner as described above to open the automatic door 1 to the fully open state shown in FIG.
5 and maintain the fully open state. As a result, it is possible to freely move back and forth through the opening 32 which remains open, which is very convenient for cleaning and inspection.

As described above, according to the present invention, a single light emitting device 6 and a single light receiving device 7 are provided in both side walls 36 and 35 of the opening 32 so as to penetrate the automatic door 1, and a pusher provided in the automatic door is provided. Button 8
Since the light beam from the light emitter 6 is interrupted by the light beam temporary interrupting unit to obtain a door opening / closing command, unlike the conventional example described with reference to FIG. In addition, since there is no movable part in the transmission path of the opening / closing command signal within the wall 35 where the light receiver 7 is stationary, there is no door opening / closing failure due to disconnection or the like, and the durability is improved. In the above embodiment, a light-blocking portion such as a light-shielding lid 15 is provided on the wall 36 on the light-emitting device 6 side to keep the output light blocked by a user operation. Since the automatic door 10 is kept open by the section 10, when the automatic door 10 is used as a connecting portion of a vehicle, there is an advantage that it is very convenient for cleaning and inspection of the vehicle.

In the above embodiment, push buttons 8 are provided on both sides of the automatic door 1 inside the room 2 and inside the separate room 3 or outside 3.
Although both sides of the light path 4 are closed by the window glass 11, when the automatic door is adopted as a connecting portion of the vehicle, the window glass on the connecting portion 3 side where there is no risk of being crowded by a person can be omitted. In this way, when the automatic door 1 is opened from the cabin 2 side, the push button is used, but from the connecting portion 3 side, the push button or the passenger only touches the window glass 11 on the cabin side, and the light beam is temporarily emitted. It will be shut off and the door will be opened. Accordingly, there is an advantage that the manufacturing cost of the automatic door can be further reduced by omitting the window glass 11 while exerting the function of the automatic door 1.
Further, the control unit 10 of the above embodiment has been described as controlling the opening and closing of the automatic door of one opening. However, when the control unit 10 is used for a vehicle connection unit, the connection unit and the cabin of the next vehicle are used. A similar automatic door is provided in the opening between them. Therefore, the control unit can control the automatic door of the next vehicle as follows, for example. That is, when the light beam is temporarily cut off when the door is fully closed, the other door is also opened, and when the light beam is temporarily cut off when the door is fully opened, the other doors are controlled in the same manner as the above-described door. When foreign matter is caught in the door during the opening / closing operation, the other door is kept in a fully opened state. In this case, there is an advantage that the automatic doors on both sides of the connecting portion can be opened and closed so as to be further adapted to the operation of the passenger passing through the connecting portion.

FIG. 3 is a plan view showing an embodiment in which the safety light device of the present invention is used for a double door automatic door. In this embodiment, a left automatic door 11 is driven so that an automatic door is protruded from the left wall 35 to the center of the opening, and a right automatic door 11 is driven to be protruded from the right wall 36 to the center of the opening. 1r
A light emitting device which is provided in the right wall 36 in the vicinity of the retracted end of the door and emits a light beam L which passes through both doors 1r, 1l straight and horizontally through the holes 4a, 4b of the vertical frame. 6 and
The configuration is the same as that of the embodiment described with reference to FIG. 1 except that the photodetector 7 is provided near the door retracting end in the left wall 35 so as to receive the light beam. Numbers are assigned and explanations are omitted. Also in this embodiment, the push button 8
Since the control unit and the motor (not shown) operate in the same manner as those described with reference to FIG. 1, the same operations and effects as those of the above-described embodiment are obtained.

In the above embodiment, the driving means of the automatic door is suspended from the rail at the upper edge of the opening via the bracket with the vehicle, and this bracket is fixed to a belt stretched over a pair of pulleys. At the same time, one of the pulleys is driven by a pulse motor, but, for example, an arm pivotally attached to the wall side end of the automatic door may be rotated by a motor. Also, instead of using a pulse motor as the motor, a fully open or fully closed state of the door is detected by providing a proximity switch at the open / close end of the door, and the control unit controls the motor based on the detection signal and the light beam temporary cutoff signal. It can also be controlled. Further, it goes without saying that the safety light beam device of the present invention can be widely applied not only to the automatic door of the connecting portion of the vehicle of the embodiment but also to the automatic door that opens and closes by reciprocating motion. Further, the arrangement of the light emitter and the light receiver of the safety light beam may be reversed.

[0023]

As is apparent from the above description, the automatic light beam safety device for an automatic door according to the present invention has an automatic door that is reciprocated by driving means so as to protrude and retract from the inside of the wall to the opening. Providing a through hole in parallel, one of the openings, in the other wall, a light emitting device that emits a light beam that coincides with the central axis of the through hole, a light receiver that receives the light beam that has passed through the through hole is provided, respectively. And the automatic door, while providing a light beam temporary blocking unit so as to block the light beam only during the operation of the user,
A control unit is provided for outputting a command signal for moving the automatic door forward or backward based on the output signal of the light receiver and the open / closed state of the automatic door. In addition to reducing the manufacturing cost of the door, there is no movable part in the transmission path of the command signal in the wall where the light receiver is stationary, so there is no door opening / closing failure due to disconnection etc., and the automatic door can be reliably opened / closed. it can.

[0024] The light beam temporary blocking portion may be a push button provided on one surface of the automatic door so as to be urged such that a tip portion protrudes outward, and the through-hole may be formed on the one surface of the automatic door. If the automatic door is closed to another side of the automatic door and opened so that the user can approach so as to block the light beam, it is closed from the one side. Is a push-button operation, and the automatic doors can be fully opened by another user's contact from another side, respectively. Can be further reduced. Further, the wall or the automatic door corresponding to the path of the light beam reaching the light receiving device is provided with a light beam blocking unit that continuously blocks the light beam by a user's operation, and the control unit controls the output signal of the light receiving device to be cut off. If the command signal for keeping the automatic door open is output to the driving means, the automatic door can be kept open by operating the light blocking unit, and a plurality of chambers connected by the automatic door can be maintained. Cleaning and inspection can be performed easily.

[Brief description of the drawings]

FIG. 1 is a horizontal cross-sectional view showing one embodiment of a safety light beam device in a fully closed and fully opened automatic door according to the present invention.

FIG. 2 is a front view of the automatic door and the safety light beam device, and detailed cross-sectional views taken along lines bb, cc, and dd in the front view.

FIG. 3 is a horizontal sectional view showing one embodiment of the safety light device of the present invention applied to a double-opening automatic door.

FIG. 4 is a horizontal sectional view showing a conventional safety light device for an automatic door.

[Explanation of symbols]

1, 1r, 1l ... automatic door, 2 ... guest room, 3 ... another indoor or outdoor
(Connecting part if vehicle), 4 ... Through-hole, 4a, 4b ... Hole, 5 ...
Holes, 6: Light-emitting device, 7: Light-receiving device, 8: Push button, 9, 14
... Spring, 10 ... Control unit, 11 ... Window glass, 12 ... Spring receiver, 15 ... Light shielding cover, 32 ... Opening, 35,36 ... Wall, 3
7 ... motor, L ... light beam.

Claims (3)

(57) [Claims] An automatic door is provided on an automatic door which is reciprocated by a driving means so as to protrude and retract from the inside of a wall into an opening of the wall, and a command signal for causing the driving means to move forward or backward by blocking the light beam. In the safety light device for an automatic door for outputting, a through hole provided through the automatic door in parallel with the reciprocating direction thereof, and a through hole provided in one wall of the opening and coinciding with a central axis of the through hole. A light emitter that emits a light beam, a light receiver provided in the other wall of the opening so as to receive the light beam that has passed through the through hole, and a user operating the automatic door. A light beam temporary blocking unit provided so as to block the light beam only for a period of time, and a control unit that outputs a command signal to the driving unit based on an output signal of the light receiver and an open / closed state of the automatic door. Automatic door safety beam device . 2. The automatic light beam interrupting section is a push button provided on one surface of the automatic door such that a tip portion protrudes outward, and the through hole is provided in the automatic door. The automatic door is closed to one side and cannot be accessed by the user, while the automatic door is open to another side and is closed by the user to block the light beam. 3. A safety light beam device for an automatic door according to claim 1. 3. A light-blocking unit that continuously blocks the light beam by a user's operation is provided on the wall or the automatic door corresponding to the path of the light beam reaching the light-receiving device, and the control unit includes:
The safety light device for an automatic door according to claim 1 or 2, wherein a command signal for keeping the automatic door open is output to the driving means when the output signal of the light receiver continues to be cut off.