JP2011241630A - Opening/closing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To realize a failure detection of a back plate sensor part with the back plate sensor part being activated even at a closing direction side from a position just before full-closure.SOLUTION: In an opening/closing device, during closing operation of an opening/closing body 10, a timer starts counting and a presence of a sensing signal of a back plate sensor part is determined after a sensing signal of a position just before full-closure detection part is produced, and when the sensing signal of the back plate sensor part is not present and the counting of the timer reaches a predetermined period of time, it is recognized as a failure of the back plate sensor part and a prescribed processing is operated.

Description

  The present invention relates to an opening / closing device in which an object on the opening / closing body closing direction side is detected by a seat plate sensing portion, and more particularly to an opening / closing device suitable as a shutter device.

Conventionally, this type of opening and closing device is provided with a seat plate sensing unit that senses and contacts an object closer to the closing direction than the opening and closing body at the closing direction end of the opening and closing body, and the seat plate sensing unit during the closing operation of the opening and closing body When touching an obstacle or the like, the opening / closing body is reversed by a predetermined amount (hereinafter referred to as a touch-up operation).
In such an opening / closing device, in order to prevent a gap from being generated between the opening / closing body and the floor surface by the touch-up operation when the opening / closing body is fully closed, the opening / closing body during the closing operation is When it reaches the position before full closure slightly above the surface, etc., the seat plate sensing unit is invalidated and the closure operation is stopped by assuming that it is fully closed when the closure operation is performed for a preset timer time. (For example, refer to Patent Document 1).

According to the prior art, although the seat plate sensing unit is invalidated in a slight range between the position before full closure and the floor surface, the closing direction end of the opening / closing body is obstructed in this range. Even if it contacts an object, the closing operation of the opening / closing body does not stop.
Therefore, the seat plate sensing unit is effectively held even below the position before the fully closed position, and when the seat plate sensing unit comes into contact with the floor surface, the closing operation is stopped without performing the touch-up operation. Controls to perform are proposed.
However, even when the control is performed so as not to invalidate the seating plate sensing unit as described above, when the seating plate sensing unit fails, the end of the opening / closing body in the closing direction hits an obstacle or a floor surface. Cannot sense contact.

Japanese Patent Laid-Open No. 10-306672

  This invention makes it an example of a subject to cope with such a problem. That is, it is an object of the present invention to make it possible to detect a failure of the seat plate sensing unit while enabling the seat plate sensing unit even in the closing direction side from the position before full closing.

  In order to achieve such an object, the technical means according to the present invention includes at least the following configuration.

  An opening / closing body that performs a closing operation by sliding an end portion in the closing direction, an opening / closing machine that is a driving source for closing the opening / closing body, and an end portion in the closing direction of the opening / closing body is within a predetermined range before full closing. A position detection unit for detecting the position before closing, a seat plate detection unit for detecting that the closing direction end of the opening / closing body is in contact with an object on the closing direction side, and the opening / closing body by controlling the opening / closing device. A control unit that performs a control operation, and is configured to effectively hold the seat plate sensing unit until the open / close body during the closing operation is fully closed, wherein the control unit closes the open / close body. During operation, after a detection signal is received by the position detection unit before the all-closed position, counting by a timer is started and the presence / absence of a detection signal by the seat plate detection unit is determined. And counting by the timer There when it reaches a predetermined time, characterized in that it recognizes that abnormality of the seat plate detecting unit performs a predetermined process.

By having such characteristics, the present invention has the following effects.
During the closing operation of the opening / closing body, if there is a detection signal from the position detection unit before all closing, and the timer counts up without the detection signal from the seat plate detection unit, it is recognized that the seat plate detection unit is abnormal and the predetermined processing is performed. Done.
Therefore, it is possible to detect the failure of the seat plate sensing unit while enabling the seat plate sensing unit even in the closing direction side of the position before the full closing.

It is a front view which shows an example of the switchgear concerning this invention. It is a flowchart which shows an example of control operation | movement about the switchgear concerning this invention. It is a flowchart which shows the other example of control operation | movement about the switchgear concerning this invention. It is a flowchart which shows the other example of control operation | movement about the switchgear concerning this invention.

  The opening / closing device according to the present invention is particularly effective when applied to a form (for example, a shutter device) in which the opening / closing body is wound and stored on a winding shaft, but the opening / closing body is wound around the winding shaft. It is also possible to apply to the form (for example, an overhead door apparatus etc.) which accommodates in the open direction side without taking.

  Examples of the form of the opening / closing body include, for example, a sheet-like body, a net-like body, a plurality of slats and pipes, or a form in which a panel is continuously provided in the opening / closing direction, and the above-described sheet-like body, net-like body, Slats, pipes, and panels are combined as appropriate.

In a preferred embodiment according to the present invention, when there is a stop command during the counting by the timer, the control unit stops the switch and interrupts the counting by the timer, and then receives a closing command. In this case, the operation in the closing direction by the switch and the counting by the timer are restarted from the point of interruption.
According to this aspect, even when there is a stop command during counting by the timer, the timer is not counted up and recognized as an abnormal state.

In a further form, the control unit stops the switch as the predetermined process.
According to this embodiment, the closing operation of the opening / closing body can be stopped when the abnormality of the seat plate sensing unit is recognized.

In a further form, the control unit continues the operation of the switch in the closing direction for a short period of time when there is a sensing signal from the seat plate sensing unit before the count by the timer reaches a predetermined time. Stop after.
According to this embodiment, when the opening / closing body is fully closed, the end in the closing direction of the opening / closing body is pressed against the contact target part for a short time, so that a gap is generated between the opening / closing body and the contact target part. Can be prevented.

In a further embodiment, the opening / closing device includes two or more seat plate sensing units for one opening / closing body, and the control unit determines whether there is a sensing signal from the seat plate sensing unit. When there is a sensing signal from all of the two or more seat plate sensing units, it is considered that there is a sensing signal by the seat plate sensing unit, and there is no sensing signal for any of the two or more seat plate sensing units. Is regarded as no sensing signal by the seat plate sensing unit.
According to this aspect, for example, even when a part of two or more seat plate sensing units fails, the failure can be recognized as an abnormal state.

In a further aspect, the opening / closing apparatus includes a first seat plate sensing unit and a second seat plate sensing unit as the seat plate sensing unit, wherein the control unit is sensed by the seat plate sensing unit. When determining the presence or absence of a signal, if both the sensing signal by the first seat board sensing unit and the sensing signal by the second seat board sensing unit are both, it is considered that there is a sensing signal by the seat board sensing unit, In the absence of one or both of the sensing signal from the first seat board sensing unit and the sensing signal from the second seat board sensing unit, it is considered that there is no sensing signal from the seat board sensing unit. .
According to this aspect, for example, even when one of the two seat board sensing units fails, the failure can be recognized as an abnormal state.

  In the present specification, the “opening / closing body thickness direction” means the thickness direction of the opening / closing body in a closed state. The “opening / closing body width direction” means a direction orthogonal to the opening / closing direction of the opening / closing body and not the opening / closing body thickness direction. Further, the “opening / closing body opening / closing direction” means a direction in which the opening / closing body slides to partition or open the opening or the internal space.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
The opening / closing device includes an opening / closing body 10 that opens and closes by sliding an end portion in the closing direction, a guide rail 20 that surrounds and guides the end portion of the opening / closing body 10 in the width direction (left-right direction in FIG. 1), And a winding device 30 that opens and closes the opening / closing body 10 to open and close the opening / closing body 10, and has a feature in control when the closing direction end of the opening / closing body 10 is within a predetermined range H before full closing. Yes.

  The opening / closing body 10 constitutes the opening / closing body main body 11 by connecting a plurality of so-called slats 11a formed by bending a horizontally-long substantially rectangular metal plate so as to rotate between the vertically adjacent slats 11a, 11a. The movable seat plate 12 is connected to the end of the opening / closing body 11 in the closing direction (the lower end in the illustrated example).

The movable seat plate 12 is a member that extends over substantially the entire length in the opening / closing body width direction, and projects downward from the lower end of the opening / closing body body 11. The movable seat plate 12 moves freely by a predetermined amount in the opening / closing body opening / closing direction (vertical direction in FIG. 1) relative to the opening / closing body main body 11.
For example, the movable seat plate 12 may be moved in the vertical direction by engaging the upper end portion of the movable seat plate 12 with the lower end portion of the opening / closing body main body 11 so as to slide a predetermined amount in the vertical direction.

Between the movable seat 12 and the opening / closing body 11, a sensor (such as a micro switch or a proximity switch not shown) that senses that the movable seat 12 has moved upward relative to the opening / closing body 11. ) Is provided.
The movable seat plate 12 and the sensor function as a seat plate sensing unit that senses that the closing direction end of the opening / closing body 10 is in contact with an object on the closing direction side. That is, when the movable seat plate 12 moves in the opening direction relative to the opening / closing body main body 11 due to the contact of an object with the end of the opening / closing body 10 in the closing direction, the contact of the sensor is turned on. Further, when the movable seat plate 12 moves in the closing direction relative to the opening / closing body main body 11 by removing the object or the like, the contact of the sensor is turned off.
In this configuration, the contact point of the sensor may be turned on when the movable seat plate 12 moves the entire movable range of the movable seat plate 12, or when the movable seat plate 12 moves the movable range by a predetermined percentage. It is good also as an aspect which a contact turns on.

  The guide rail 20 is a member having a substantially U-shaped cross section that surrounds an end of the opening / closing body 10 in the width direction, and a contact target portion p (for example, a floor surface, the ground, or a frame member) seated by the opening / closing body 10. Etc.) and the winding device 30.

  In addition, the winding device 30 includes a winding shaft 32 that winds and unwinds the opening / closing body 10 in a storage case 31 in which an opening for allowing the opening / closing body 10 to appear and retract on the lower side, and the winding shaft. An opening / closing device 40 that drives and rotates 32, and a control unit 50 that controls the opening / closing body 10 by controlling the opening / closing device 40.

  The switch 40 includes a direct-current or alternating-current electric motor, a power transmission mechanism (specifically, a gear or the like) that adjusts the rotational force of the electric motor to an appropriate rotational speed and torque, and transmits the torque to the winding shaft 32. And a counter-type limit switch 41 that outputs a contact signal when the rotation amount of the output shaft of the power transmission mechanism reaches a predetermined value.

The counter-type limit switch 41 is a well-known mechanism that combines a counter mechanism that mechanically counts the rotation amount of the output shaft and a micro switch that operates when the count value of the counter mechanism reaches a predetermined value. It is. The counter-type limit switch 41 is a position detection unit before full closure that senses that the end of the opening / closing body 10 in the closing direction (more specifically, the lower end of the movable seat 12) is within a predetermined range H before full closure. Function.
That is, when the closing direction end of the opening / closing body 10 enters the predetermined range H before the full closing by the closing operation, the contact of the counter type limit switch 41 is turned on. Further, when the closing direction end of the opening / closing body 10 moves to the opening direction side (upward side in the illustrated example) from the predetermined range H before full closing by the opening operation, the contact of the counter type limit switch 41 is turned off. Become.

In addition, the control unit 50 is input from the position detection unit before full closure, the seat plate detection unit, an operation unit (not shown) (for example, a push button switch, a remote controller, a computer that generates an operation signal, a portable terminal, or the like). A control circuit that electronically processes the electrical signal based on a program and supplies control power corresponding to the processing result to the switch 40 to cause the switch 40 to rotate forward, reverse, stop, and the like.
The controller 50 is preferably configured by a programmed logic circuit used in, for example, a microcomputer or a programmable controller so that the circuit configuration, setting values, and the like can be easily changed in accordance with the field conditions. A circuit using a relay circuit or other electronic circuit can also be used.

  Next, an example of the control operation for the switchgear having the above-described configuration will be described in detail based on the flowchart shown in FIG.

First, it is assumed that the opening / closing body 10 is in a closing operation as a precondition.
In step 1, during the closing operation of the opening / closing body 10, it waits for a detection signal from the position detection unit before closing (more specifically, the counter-type limit switch 41), and when there is the detection signal, The process proceeds to the next step 2.

In step 2, counting by the abnormality detection timer is started. The abnormality detection timer is a timer on the electronic circuit of the control unit 50 and is used to detect an abnormality in the seat plate sensing unit.
The time for which the abnormality detection timer counts up is appropriately set so that when there is no sensing signal from the seating plate sensing unit, it is determined that the seating plate sensing unit is out of order. This time is set to about 4 seconds according to a preferred example of the present embodiment, but the setting may be changed as necessary.

  In step 3, it is determined whether or not the abnormality detection timer has been counted up. If it has been counted up, the process proceeds to the next step 4, and if not, the process proceeds to step 3 a.

In step 4, the closing operation of the opening / closing body 10 is stopped by stopping the opening / closing device 40. Then, the process according to the flowchart ends as an abnormal stop state.
That is, during the closing operation of the opening / closing body 10, if there is no sensing signal by the seat plate sensing unit for a predetermined time after the sensing signal by the position detection unit before closing, it is determined that the seat board sensing unit is abnormal. Then, the switch 40 is immediately stopped, and the closing operation of the opening / closing body 10 is stopped.
In this abnormal stop state, a special release operation using an operation switch or the like is required. In addition, you may make it perform alarm output, such as blink of a lamp | ramp and the output of an alarm sound, as needed.

  In step 3a, it is determined whether or not there is a sensing signal from the seat plate sensing unit. If there is a sensing signal, the process proceeds to the next step 4a, and if not, the process returns to step 3.

In the next step 4a, counting by the push-in timer is started and counting by the abnormality detection timer is stopped.
The push-in timer is a timer on the electronic circuit of the control unit 50, and is used to further operate the opening / closing machine 40 in the closing direction after the closing direction end of the opening / closing body 10 contacts the contact target portion p. . That is, even when the closing direction end of the opening / closing body 10 abuts against the contact target site p and a sensing signal is received by the seat plate sensing unit, due to the state of the floor surface or the like that is the contact target site p, There may be a partial gap between the movable seat plate 12 and the contact target portion p in the opening / closing body width direction. Therefore, even after the closing direction end of the opening / closing body 10 comes into contact with the contact target site p, the operation in the closing direction by the opening / closing device 40 is continued for a minute time by the pushing timer, and the closing direction of the opening / closing body 10 The end is pressed against the contact target site p.

In step 5a, the process waits for the push-in timer to count up. If the push-in timer has counted up, the process proceeds to the next step 6a.
The time for the push-in timer to count up is such that the opening / closing body 10 is pressed against the contact target part p until there is almost no gap between the closing direction end of the opening / closing body 10 and the contact target part p, and the opening / closing body 10 Is appropriately set so as not to be reversely wound around the winding shaft 32 or an excessive compression force is applied to the opening / closing body 10. This time is set to about 0.2 seconds according to a preferred example of the present embodiment.

In step 6a, the closing operation of the opening / closing body 10 is stopped by stopping the opening / closing device 40, and the process according to the flowchart is ended as a normal fully closed stop state.
In this stop state, the closing command for operating the opening / closing body 10 in the closing direction is invalidated until the detection signal from the position detection unit before all the closings disappears. That is, in this stop state, for example, even if a close button operation (not shown) is performed, the stop state of the switch 40 is maintained. Therefore, it is possible to prevent the opening / closing body 10 from being reversely wound around the take-up shaft 32 or applying an excessive compressive force to the opening / closing body 10 by the closing button operation when fully closed. The state in which the closing command is invalidated continues until the closing direction end of the opening / closing body 10 moves above the predetermined range H by the opening operation, and thus the detection signal from the position detection unit before all the closings disappears.

Thus, according to the flowchart shown in FIG. 2, when the closing direction end of the opening / closing body 10 comes into contact with an obstacle or the like even after the opening / closing body 10 during the closing operation enters the predetermined range H before the full closing. In addition, the closing operation of the opening / closing body 10 can be stopped after continuing for a minute time.
Further, when the opening / closing body 10 during the closing operation comes into contact with the contact target portion p, the opening / closing body 10 can be stopped while being pressed against the contact target portion p. It is possible to prevent a gap from being generated between the contact target portion p.
Moreover, when the seat plate sensing unit fails, the state can be recognized as an abnormal state by counting up the abnormality detection timer, and the closing operation of the opening / closing body 10 can be immediately stopped.

Next, another control example whose flowchart is shown in FIG. 3 will be described.
In the flowchart shown in FIG. 3, detailed description of portions overlapping with the flowchart shown in FIG. 2 is omitted as appropriate.

  First, in step 11, during the closing operation of the opening / closing body 10, it waits for a detection signal from the position detection unit before closing (more specifically, the counter-type limit switch 41), and when there is the detection signal. Advances the process to the next step 12.

  In step 12, counting by the abnormality detection timer is started.

  In step 13, it is determined whether or not there is a stop command by operating a stop switch or the like of an operation unit (not shown). If there is a stop command, the process proceeds to the next step 14, and if not, the process proceeds to step 13 a. Proceed.

  In step 14, the closing operation of the opening / closing body 10 is temporarily stopped by stopping the opening / closing machine 40, and the process proceeds to the next step 15.

  In step 15, counting by the abnormality detection timer is temporarily stopped. At this time, the remaining time by the abnormality detection timer is held. Then, the process proceeds to the next step 16.

  In step 16, it waits for a closing command by operating a closing switch or the like of an operation unit (not shown), and if there is a closing command, the process proceeds to the next step 17.

  In step 17, the closing operation of the opening / closing body 10 is resumed by resuming the operation of the opening / closing device 40, and the process proceeds to the next step 18.

  In step 18, counting by the abnormality detection timer is resumed. In this case, the remaining time held in step 15 is counted. Then, after this step 18, the process is returned to step 13.

  Further, in step 13a, it is determined whether or not the abnormality detection timer has been counted up. If it has been counted up, the process proceeds to the next step 14a, and if not, the process proceeds to step 13b.

  In step 14a, the closing operation of the opening / closing body 10 is stopped by stopping the opening / closing machine 40. And the process by the said flowchart is complete | finished as an abnormal stop state.

  Moreover, the process by step 13b-16b is the same as that of said step 3a-6a in the flowchart of FIG.

Thus, according to the control example shown in FIG. 3, even when there is a stop command during counting by the abnormality detection timer, the abnormality detection timer is not counted up and recognized as an abnormal state.
Then, the count by the abnormality detection timer is temporarily stopped while the remaining time is held when the stop command is issued, and is restarted by the close command. Thereafter, when there is no stop command and the abnormality detection timer counts up, it is recognized as an abnormal state due to a failure of the seat plate sensing unit, and the closing operation of the opening / closing body 10 can be immediately stopped by stopping the switch 40. .

Next, another control example whose flowchart is shown in FIG. 4 will be described.
Note that, in the flowchart shown in FIG. 4, detailed description of portions overlapping with the flowchart shown in FIG. 2 or 3 is omitted as appropriate.

  The opening / closing device shown in the flowchart in FIG. 4 has a relatively long dimension in the width direction of the opening / closing body 10 and is arranged in the width direction of the opening / closing body 10 so that the first seat plate sensing unit and the second seat plate are arranged. It has two types of sensing.

First, the processes of steps 21 to 28 are the same as steps 11 to 18 of the control example shown in FIG.
Further, the processes of steps 23a and 24a are the same as steps 13a and 14a of the control example shown in FIG.

  In step 23b, it is determined whether or not there is a sensing signal from the first seat plate sensing unit. If there is a sensing signal, the process proceeds to the next step 24b, and if not, the process proceeds to step 23d.

  In step 24b, it is determined whether or not there is a sensing signal from the second seat plate sensing unit. If there is a sensing signal, the process proceeds to the next step 25b, and if not, the process proceeds to step 24c.

  In step 24c, it is determined whether or not the abnormality detection timer has been counted up. If the timer has been counted up, the process proceeds to step 24a, and the closing operation of the opening / closing body 10 is stopped by stopping the switch 40. Otherwise, the process returns to step 24b.

  In step 23d, it is determined whether or not there is a sensing signal from the second seat plate sensing unit. If there is a sensing signal, the process proceeds to the next step 24d, and if not, the process returns to step 23.

  In step 24d, it is determined whether or not there is a sensing signal from the first seat plate sensing unit. If there is a sensing signal, the process proceeds to the next step 25b, and if not, the process proceeds to step 24e.

  In step 24e, it is determined whether or not the abnormality detection timer has been counted up. If the timer has been counted up, the process proceeds to step 24a and the closing operation of the opening / closing body 10 is stopped by stopping the switch 40. Otherwise, the process returns to step 24d.

  That is, according to the steps 23a to 24e, when the control unit 50 determines the presence / absence of a detection signal by the seat plate sensing unit, the control signal by the first seat plate sensing unit and the detection by the second seat plate sensing unit. If both signals are present, it is considered that there is a sensing signal from the seat board sensing unit, and the process proceeds to the next step 25b, where the sensing signal from the first seat board sensing unit and the sensing signal from the second seat board sensing unit are processed. If either or both of the detection signals are not detected, it is considered that there is no detection signal by the seat plate detection unit, and the switch 40 is immediately stopped in step 24a.

  Steps 25b to 27b are the same as steps 4a to 6a in the control example shown in FIG.

  Thus, according to the control example shown in FIG. 4, even if there is a sensing signal from the first seat plate sensing unit, if there is no sensing signal from the second seat plate sensing unit, an abnormality detection is performed. By counting up the timer (step 24c), it is recognized as an abnormal state, and the closing operation of the opening / closing body 10 by the opening / closing device 40 can be immediately stopped. Even if there is a detection signal from the second sensing unit, even if there is no detection signal from the first seat plate sensing unit, it is recognized as an abnormal state by counting up the abnormality detection timer (step 24e). The closing operation of the opening / closing body 10 by the opening / closing device 40 can be immediately stopped.

  In addition, in the switchgear which shows the control example in FIG. 4, the two seat plate sensing units are provided for one switch body as described above. However, as another example, two or more seat plates are provided for one switch body. A sensing unit, and when there is a sensing signal from all of the two or more seat plate sensing units, it is considered that there is a sensing signal by the seat plate sensing unit, and the sensing signal is sent to any one of the two or more seat plate sensing units. If not, it may be considered that there is no sensing signal from the seat plate sensing unit.

  Further, according to the above-described embodiment, the counter type limit switch 41 of the opening / closing machine 40 is used as a position detection unit before full closing, but another example of the position detection unit before full closing is provided on the guide rail 20. A contact-type or non-contact-type sensor (for example, a micro switch, a proximity switch, or the like) configured to detect the opening / closing body 10 in the fully closed position may be used.

  In addition, the seat plate sensing unit may be other than the above-described embodiment as long as it can detect that the closing direction end of the opening / closing body 10 is in contact with the contact target site p. Further, a mode in which a sensor (for example, a tape switch or the like) that outputs a detection signal by a pressing force from below is provided at the end of the opening / closing body 10 in the closing direction may be used.

  Although not shown in the illustrated flowchart, when the closing direction end of the opening / closing body 10 is located on the opening direction side with respect to the fully closed front position (predetermined range H), the seat plate sensing unit may When the detection signal is received, predetermined danger prevention control is performed, for example, the flip-up body 10 is turned upside down (touch-up operation).

  In the above embodiment, as a preferred mode, the count time by the push-in timer is secured for a predetermined time (0.2 seconds according to the illustrated example). The count time of the push-in timer may be adjustable so that can be zero (the push-in timer is disabled).

  Further, when the movable seat plate 12 is configured to turn on the contact of the sensor in the seat plate sensing unit when the movable seat plate 12 moves the movable range by a predetermined ratio, the movable seat plate 12 remains after the sensor is turned on. The count time of the push-in timer may be adjusted so that the push-in timer counts up before moving through the movable range. According to this aspect, since the closing operation of the opening / closing body 10 can be stopped before the movable seat plate 12 has moved through the entire movable range of the movable seat plate 12, it is possible to prevent the opening / closing body 10 from being subjected to an excessive load due to pressing. .

10: Opening and closing body 12: Movable seat plate (seat plate sensor)
30: Winding device 40: Opening / closing machine 41: Counter type limit switch (position detection part before full closing)
50: Control unit

Claims (6)

An opening / closing body that performs a closing operation by sliding an end portion in the closing direction, an opening / closing machine that is a driving source for closing the opening / closing body, and an end portion in the closing direction of the opening / closing body is within a predetermined range before full closing. A position detection unit for detecting the position before closing, a seat plate detection unit for detecting that the closing direction end of the opening / closing body is in contact with an object on the closing direction side, and the opening / closing body by controlling the opening / closing device. An opening / closing device comprising a control unit that performs a control operation, and that effectively holds the seat plate sensing unit until the opening / closing body during the closing operation is fully closed,
The control unit, during the closing operation of the opening and closing body, after receiving a detection signal by the position detection unit before all hands, starts counting by a timer and determines the presence or absence of the detection signal by the seat plate detection unit, An opening / closing apparatus characterized in that when there is no detection signal from the seat plate sensing unit and the count by the timer reaches a predetermined time, the seat plate sensing unit is recognized as abnormal and performs a predetermined process.   When there is a stop command during counting by the timer, the control unit stops the switch and interrupts the counting by the timer, and then when the closure command is issued, the closing direction by the switch 2. The switchgear according to claim 1, wherein the operation and the counting by the timer are restarted from the point of interruption.   The switchgear according to claim 1 or 2, wherein the control unit stops the switchgear as the predetermined process.   The control unit stops the operation of the switch in the closing direction after a minute period of time when there is a detection signal by the seat plate detection unit before the count by the timer reaches a predetermined time. The switchgear according to any one of claims 1 to 3. An opening / closing device comprising two or more seat plate sensing units for one opening / closing body,
When determining whether there is a sensing signal from the seat board sensing unit, the control unit considers that there is a sensing signal from the seat board sensing unit when there is a sensing signal from all of the two or more seat board sensing units. 5. The switchgear according to claim 1, wherein when there is no sensing signal for any one of the seat plate sensing units, it is regarded that there is no sensing signal from the seat plate sensing unit. An opening and closing device comprising a first seat plate sensing unit and a second seat plate sensing unit as the seat plate sensing unit,
When the control unit determines whether there is a sensing signal from the seat plate sensing unit, the control unit has both a sensing signal from the first seat plate sensing unit and a sensing signal from the second seat plate sensing unit. When the sensing signal from the first seating plate sensing unit and the sensing signal from the second seating plate sensing unit are not present, the sensing signal from the first seating plate sensing unit and the sensing signal from the second seating plate sensing unit are absent. The switchgear according to any one of claims 1 to 4, characterized in that no sensing signal is detected by the seat plate sensing unit.

Images