JP2011137315A - Blind - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent an interference with the other slat group caused by the abnormality of one slat group in the case of providing a plurality of slat groups adjacently. <P>SOLUTION: This blind includes an abnormality detecting means 32 detecting the abnormality of opening/closing operation of slats corresponding to each slat group G, and a control part 38 controlling opening/closing of the slats. When the abnormality detecting means 32 detects the abnormality of opening/closing operation of at least one slat group out of the plurality of slat groups, a stop signal for stopping operation is input to the control part 38 of the slat group adjoining the slat group in which abnormality is detected. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a blind in which a slat group is formed by holding a slat on a slat support member, and the slat is opened and closed by rotating the slat support member.

Conventionally, what was described in patent document 1 is known as this kind of blind.
The blind shown here supports a large number of slat holders, each supporting a number of slats, rotatably supported by a frame, and each slat holder is connected by a link mechanism, and each link mechanism is driven by a motor. It is possible. When the motor is operated, a group of slats consisting of a number of slats can be rotated in the same phase via a link mechanism. When fully opened, the slats are rotated together so that they are positioned in parallel. However, when fully closed, the slats are simultaneously rotated so as to be connected in a flat plate shape to shield light. Each slat is formed in a flat plate shape except for the end portion in the width direction, and a curved portion is provided at the width direction end portion on the rotating shaft side of the slat. The other end in the width direction is bent upward to form a contact portion, and when fully closed, the contact portion of each slat is in contact with the curved portion of the adjacent slat from above.

Japanese Patent No. 2607711

  By the way, when one motor or one or more motors are arranged coaxially, there is a limit to the number of slats that can be operated by the motor, so a blind is set at a large opening. In such a case, a plurality of motors are provided at predetermined intervals in the rotation direction of the slats, and the slat groups are continuously arranged adjacent to each other so that each motor operates each slat group.

  As described above, when a plurality of slat groups are continuously arranged, there is no problem when each slat group is operating at the same time, but when only one slat group is operated, If only the slat group can operate, the link mechanism or slat holder of the other slat group may interfere with the slat holder or link mechanism of one rotatable slat group at the boundary between adjacent slat groups. There is. When this interference occurs, the rotation of one of the slat groups is constrained, and the slats are only opened halfway. In the worst case, there is a problem that the interference causes damage to the blind.

  The present invention has been made in view of such a problem, and when a plurality of slat groups are continuously provided adjacent to each other, interference with other slat groups when only one slat group operates can be prevented. Its purpose is to provide blinds.

In order to achieve the above-described object, according to the first aspect of the present invention, a plurality of slats are formed in a support drive unit via a slat support member to form one slat group, and a plurality of slat groups are rotated by the slats. The blinds are arranged adjacent to each other in parallel along the direction, and the slat support member is rotated by the drive of the support drive unit corresponding to each slat group, and the slat is opened and closed.
Corresponding to each slat group, an abnormality detecting means for detecting an abnormality of the opening and closing operation of the slat and a control unit for controlling the opening and closing of the slat are provided, and the control units of the respective slat groups are connected to each other, When the abnormality detecting means detects an abnormality in the opening / closing operation of at least one slat group of the plurality of slat groups, the operation is performed on the control unit of the slat group related to the slat group in which the abnormality is detected. A stop signal for stopping is input.

  The invention described in claim 2 is characterized in that the related slat group described in claim 1 includes a slat group arranged adjacent to the slat group in which an abnormality is detected.

In a third aspect of the present invention, a plurality of slats are formed on a support driving unit via a slat support member to form one slat group, and the plurality of slat groups are adjacent to each other in parallel with each other along the rotation direction of the slats. The slat support member is rotated by the drive of the support drive unit corresponding to each slat group, and the slat is opened and closed.
Corresponding to each slat group, an abnormality detecting means for detecting an abnormality of the opening and closing operation of the slat and a control unit for controlling the opening and closing of the slat are provided, and the control units of the respective slat groups are connected to each other, When the control unit corresponding to the slat group detects an abnormality based on the detection signal from the abnormality detection means, the control unit transmits a stop signal.

  The invention according to claim 4 is characterized in that the control unit according to claim 3 transmits a stop signal to the control unit of the slat group arranged adjacent to the slat group in which the abnormality of the opening / closing operation is detected. And

  The invention according to claim 5 is characterized in that the control unit according to claim 3 transmits a stop signal to a slat group belonging to a predetermined group.

In a sixth aspect of the present invention, a plurality of slats are formed on a support drive unit via a slat support member to form one slat group, and the plurality of slat groups are adjacent to each other along the rotation direction of the slats. The slat support member is rotated by the drive of the support drive unit corresponding to each slat group, and the slat is opened and closed.
Corresponding to each slat group, an abnormality detecting means for detecting an abnormality of the opening and closing operation of the slat and a control unit for controlling the opening and closing of the slat are provided, and the control units of the respective slat groups are connected to each other,
Each slat group can be opened and closed based on a command signal from the command means. The command signal includes a signal for designating a slat group to be opened and closed and an opening and closing command signal for commanding the opening and closing operation of the slat group. Included,
When the control unit corresponding to the slat group detects an abnormality based on the detection signal from the abnormality detection means, the control unit transmits a stop signal, and the stop signal specifies the slat group specified by the command signal. And a stop command signal for commanding stop of the operation.

According to the seventh aspect of the present invention, one slat group is formed by holding a plurality of slats via a slat support member on the support driving unit, and the plurality of slat groups are adjacent to each other in parallel with each other along the rotation direction of the slats. The slat support member is rotated by the drive of the support drive unit corresponding to each slat group, and the slat is opened and closed.
Corresponding to each slat group, an abnormality detecting means for detecting an abnormality of the opening and closing operation of the slat and a control unit for controlling the opening and closing of the slat are provided, and the control units of the respective slat groups are connected to each other,
Each slat group can be opened and closed based on a command signal from the command means. The command signal includes a signal for designating a slat group to be opened and closed and an opening and closing command signal for commanding the opening and closing operation of the slat group. Included,
When the control unit corresponding to the slat group detects an abnormality based on the detection signal from the abnormality detection means, the control unit transmits a stop signal, and the stop signal is a signal designating a predetermined related slat group. And a stop command signal for commanding stop of the operation.

  According to the present invention, in a plurality of adjacent slat groups, when at least one slat group among the plurality of slat groups has an abnormality in the opening / closing operation for some reason, Since a stop signal is input to the control unit, it is possible to prevent interference between slat groups.

  Further, since the stop signal is immediately transmitted from the control unit of the slat group in which an abnormality has occurred to the control unit of the other slat group, interference between the slat groups can be quickly avoided.

  Furthermore, when an abnormality occurs in at least one of the slat groups controlled at the same time based on the command signal, the slat group controlled at the same time specified by the command signal or a predetermined related slat group Since the stop signal is transmitted to the control unit, the operation of only the minimum slat group that needs to avoid interference can be stopped.

It is a partial side view showing the fully open state of the blind which concerns on embodiment of this invention. It is a partial side view showing the fully closed state of the blind which concerns on embodiment of this invention. It is a side view showing the rotation locus | trajectory of a slat. It is a partial side view showing the state of the boundary part of the slat group arrange | positioned adjacently at the time of a slat full open. It is a partial side view showing the state of the boundary part of the slat group arrange | positioned adjacently at the time of a slat full closure. It is a block diagram including the control apparatus of the blind which concerns on embodiment of this invention. It is a control flowchart of the opening operation | movement in the control apparatus of FIG. It is a block diagram including the control apparatus of the blind which concerns on another embodiment of this invention. It is a control flowchart of the opening operation | movement in the control apparatus of FIG. 1 is a configuration diagram of a blind system including a blind according to an embodiment of the present invention. It is a partial side view when only one slat group performs an opening operation.

  Hereinafter, embodiments of the present invention will be described with reference to FIGS. 1 to 5.

  The blind 10 according to this embodiment is set to an opening such as a skylight, for example, and includes a plurality of slat groups G and G as shown in FIGS.

  The blind 10 has a support drive unit 12 corresponding to each slat group G and supported by a support bolt B with respect to the structure.

  The support drive unit 12 includes a frame 13, a motor unit 14 including a motor, and a link mechanism 16 that is connected to the motor unit 14 and operates by driving the motor. The link mechanism 16 includes a first joint bar 17 whose one end is fixed to the output shaft of the motor, a second joint bar 18 whose one end is pivotally attached to the other end of the first joint bar 17, and a second joint bar 18. The swing rail 20 is pivotally attached to the other end of the swing rail 20. One end of a slat holder 22, which is a large number of slat support members, is pivotally attached to the swing rail 20 at predetermined intervals in the longitudinal direction of the swing rail 20. Further, the frame 13 is provided with a number of support bars 24 extending vertically downward corresponding to the slat holders 22, and each support bar 24 has the other end of the corresponding slat holder 22 at its center of rotation. At point C, it is pivotally attached.

  By holding the slats 26 on all the slat holders 22, a slat group G composed of a large number of slats 26 supported in an aligned state is formed. The rotation center point C of the slat holder 22 is offset to one end side with respect to the lateral direction center of the slat 26, and the slat 26 is centered on the rotation center point C with respect to the support drive unit 12. It is rotatably supported.

  When one motor or one or more motors are arranged coaxially (in the present embodiment, it is assumed to be one), the number of slats 26 that can be driven by the motor unit 14 is limited. In accordance with the set opening, two or more slat groups G are continuously arranged adjacent to each other in parallel with each other along the rotation direction of the slat 26, and each slat group G corresponds to the corresponding support driving unit 12. Supported and driven by.

  A shielding frame 30 is arranged around all the slat groups G, and the shielding frame 30 is fixed to the structure.

  When the first joint bar 17 of the link mechanism 16 is rotated by the motor of the motor unit 14, the swing rail 20 performs a translational swing motion with the movement of the second joint bar 18, and each slat holder 22 and each slat 26 are A rotational motion is performed in the same phase around the rotational center point C (FIG. 3), and this rotational motion causes the slats 26 to be parallel to each other and a gap is formed between adjacent slats 26. The state (FIGS. 1 and 4) and the fully closed state (FIGS. 2 and 5) in which each slat 26 is on the same plane and forms a closed surface 28, and there is no gap between adjacent slats 26. Can be displaced between. In order to prevent a gap from being formed between the adjacent slats 26 in the fully closed state, the end portions of the respective slats 26 are overlapped with the end portions of the adjacent slats 26.

  When adjacent slat groups G perform the same operation at the same time, the swing rails 20 corresponding to the slat groups G operate in parallel, so that no interference between adjacent blinds 10 occurs. For example, as shown in FIG. 2, when all the slat groups G are in the fully closed state, one end of the swing rail 20 corresponding to one slat group G and the slats of the slats 26 near the boundary of the other slat group G A space is maintained between the holder 22 and the holder 22. At this time, even at the boundary between adjacent slat groups G and G, the end of the slat 26 closest to the boundary of one slat group G is the end of the slat 26 closest to the boundary of the other slat group G. And overlap.

  Furthermore, in the present invention, as shown in FIG. 6, corresponding to each slat group G, an abnormality detection means 32 is provided for detecting whether or not the operation of each slat group is in a normal state. The abnormality detection means 32 may be an encoder 32 that detects the rotation of the slats, and the encoder 32 directly detects the movement of the motor of the motor unit 14, the movement of any element of the link mechanism 16, or the slats. The movement of the holder 22 or the like can be used, and the encoder 32 can be arranged at a position suitable for detection of the detection target in accordance with the detection target. The encoder 32 generates a pulse every time the detection target rotates by a predetermined angle.

  In addition to the encoder 32, an open limit 34 and a close limit 36 for detecting whether the slat 26 is fully open or fully closed are provided. Similar to the encoder 32, the open limit 34 and the close limit 36 are directly detected by any one of the movement of the motor of the motor unit 14, the movement of any element of the link mechanism 16, or the movement of the slat holder 22. In accordance with the detection target, the open limit 34 and the close limit 36 can be arranged at positions suitable for detection of the detection target.

  Detection signals of the encoder 32, the open limit 34, and the close limit 36 are sent to the control device 38 corresponding to each slat group G. As shown in FIG. 6, the control device 38 controls the motor of the motor unit 14 based on a command signal sent from a manually operated controller 40 or a detection signal sent from a signal line 42 and an encoder 32 or the like. . The command signal includes a signal for designating the control device 38 of the slat group G to be operated, and an open / close command signal for commanding the open / close operation, and the open / close command signal includes an open command signal and a close command signal. . The control devices 38 for the respective slat groups G are connected to each other by a signal line 42.

  When an operation is performed using the controller 40 corresponding to any of the slat groups G, a command signal is output from the controller 40. When the controller 38 determines that the open / close command signal is an open command signal, the controller 38 opens the operation shown in FIG. Is done.

  That is, the control device 38 rotationally drives the motor of the motor unit 14 in the corresponding direction, and the opening operation of the slat group G is started (step S12). Then, it is determined whether the pulse interval input from the encoder 32 to the control device 38 is within the reference (step S14). That is, if the ON / OFF pitch time from the encoder 32 is within the range between the upper limit setting numerical value and the lower limit setting numerical value, it is determined that the pitch time is within the reference. If it is determined in step S14 that the pulse interval is not within the reference (NO in step S14), it is assumed that an abnormality has occurred, and the control device 38 stops the motor of the motor unit 14 and stops the opening operation. (Step S16). Such abnormalities include motor / gear drive stoppage or damage due to overload, motor / gear failure due to high or low temperature, motor failure due to condensation or water leakage, drive stop due to motor output drop due to low voltage. The life of the motor is assumed.

  And the control apparatus 38 transmits a stop signal (step S17). The stop signal includes a signal that designates the control device 38 of the related slat group G and a stop command signal that instructs the stop of the operation. Here, the related control device 38 of the slat group G is the control device 38 of the slat group G arranged adjacent to the slat group G in which this abnormality has occurred, or a slat group belonging to a predetermined group. The G control device 38 can be used. Furthermore, the slat group control devices 38 belonging to a predetermined group may be the control devices 38 of all the slat groups G arranged continuously in the same opening. Information of the control device 38 of the related slat group to be specified is registered in advance in the storage means of each control device 38.

  Alternatively, the stop signal may include a signal designating the control device 38 of the slat group G designated in the command signal and a stop command signal. In this case, in each control device 38, it is possible to make it unnecessary to register in advance information relating to the slat group related to the control device 38.

  In step S14, if the pulse interval is within the reference (step S14, YES), it is determined whether or not the open limit 34 is ON (step S15). If it is determined that the open limit 34 is ON (step S5, YES), the open operation is stopped assuming that the open limit 34 is fully open (step S18). If the open limit 34 is not ON (step S15, NO), whether or not a stop signal designating the control device 38 of the slat group G of interest is input from the control device 38 corresponding to another slat group. Determination is made (step S19). When the stop signal is not inputted (step S19, NO), the process returns to step S14 and the processes of steps S15 and S19 are repeated. On the other hand, when it determines with the stop signal being input in step S19 (step S19, YES), the control apparatus 38 stops the motor of the motor unit 14, and stops opening operation (step S20).

  Thereby, when an abnormality occurs in a certain slat group G for some reason, a stop signal is input to the control device 38 of another related slat group G, so that interference between the slat groups G can be prevented in advance. it can.

  For example, as shown in FIG. 11, if it is assumed that the left slat group G cannot open due to an abnormality and only the right slat group G opens, it corresponds to the right slat group G. The swing rail 20 moves to the left, and the slat holder 22 rotates around the rotation center point C so that the slat 26 has a vertical angle, and the right slat holder 22 moves to the left slat group. Since it tends to incline to the left of the corresponding swing rail 20, interference occurs between the slat groups G and G. However, according to the present invention, since the right slat group G immediately stops the opening operation by the stop signal by detecting the abnormality of the left slat group G, it is possible to prevent the occurrence of interference.

  In the above example, if an abnormality occurs in a certain slat group G and the opening operation is not performed properly, interference occurs between the slat group performing the opening operation and the slat group in which the abnormality occurs. Therefore, the detection signal of the encoder 32 is determined during the opening operation process of the control device 38. However, the detection signal of the encoder 32 is not limited to this when the closing operation is performed. The same may be done.

  As shown in FIG. 8, the abnormality detection means may be a voltage / current measurement unit 44 that measures the voltage applied to the motor of the motor unit or the current flowing through the motor instead of the encoder. FIG. 9 is a flowchart showing the process of the opening / closing operation by the control device 38 in the case where the voltage / current measuring unit 44 is an abnormality detecting means. To explain only the difference from FIG. 7, in step 14 of FIG. 9, it is determined whether or not the measured value of the preset voltage or current is within the standard. Specifically, if it is within the range of the voltage value / current value upper limit set value and the voltage value / current value lower limit set value, it is determined that it is within the reference, and if it exceeds the range, it is determined that it is not within the reference. If it is within the reference (YES in step S14), step S15 is executed, and if not within the reference (NO in step S14), step S16 is executed.

  Thereby, the same effect as the case where the encoder 32 is used is obtained.

  The abnormality detection means is not limited to the encoder 32 and the voltage / current measurement unit 44 as described above, and a variable resistor, a fault limit, or the like may be used. For example, when a variable resistor is used, the control device 38 may check the change of the variable resistor during operation, determine whether it is within a preset resistance value, and detect an abnormality. In addition, a failure limit such as a hit type or an approach sensor may be attached to a portion that hits at the time of failure, and an abnormality may be detected when a reaction occurs.

  Furthermore, the abnormality detection means for detecting the operation of a certain slat group G can be arranged on the adjacent slat group G side. For example, it is possible to provide an abnormality detecting means for detecting the movement of the swing rail 20 of the slat group G to be detected on the swing rail 20 of the slat group G adjacent to the slat group G to be detected. For example, when the abnormality detecting means detects relative movement between the swing rails 20, if the slat group is operating at the same time, no relative movement occurs between the swing rails 20, and one of the abnormalities is detected. When the slat group does not operate, relative movement between the swing rails 20 occurs. In that case, the abnormality detection means sends a stop signal from the control unit 38 of the adjacent slat group G to the related control unit of the slat group G. 38 may be transmitted.

  By the way, in the above description, the case where the blind 10 having a plurality of slat groups G is set in one opening has been described. However, the blind system includes other blinds of the same type or different types. May be part of

  In the blind system 100 shown in FIG. 10, the central control device 101 and a plurality of floor relay devices 102 are connected by a main signal line 105, and the floor relay device 102 and each control device 38 of the plurality of blinds are connected by a floor signal line 106. ing.

  For example, in principle, one floor relay apparatus 102 is installed on each floor of a building, and a total of N sets of control apparatuses 38 are installed on each floor. Therefore, the control apparatus 38 can install a maximum of N × M units.

  In the illustrated example, all the blinds 10 are assumed to have the same configuration. However, the configuration is not necessarily limited thereto, and a configuration different from the slat group illustrated in FIGS. 1 to 5 is mixed. Also good.

  The central control device 101 as command means obtains an open / close state suitable for each blind 10 at predetermined time intervals, an open / close command signal indicating the open / close state, and a group signal designating a plurality of control devices 38 of the blind 10 Is output to the main signal line 105. For example, the central controller 102 obtains information such as a predetermined control time schedule of the blind 10, a current sunny / non-clear weather condition obtained from the illuminance sensor, a sun direction obtained from the current date / time, and altitude information. Thus, an open / close command signal representing an optimal open / close state to be taken by each blind 10 is generated. When the command signal is received by the control device 38 of the blind 10 belonging to the specified group via the floor relay device 102 and the floor signal line 106, the control device 38 performs control, and FIG. Processing similar to that shown is performed.

  And when abnormality is detected, the control apparatus 38 transmits a stop signal. The stop signal can include a signal for designating a group included in the command signal and a stop command signal, and the stop signal is output to the floor signal line 106.

  Alternatively, the control device 38 is not a group included in the command signal, but transmits a stop signal including a signal designating a predetermined control device of the related slat group G and a stop command signal. It may be. As described above, the related slat group control device 38 is the control device 38 of the slat group G arranged adjacent to the slat group G in which this abnormality has occurred, or a slat group belonging to a predetermined group. The G control device 38 can be used. Information of the control device 38 of the related slat group to be specified is registered in advance in the storage means of each control device 38.

  If the control device 38 corresponding to the slat group G in which an abnormality has occurred directly transmits a stop signal, the operation of the related slat group G can be performed more quickly than when a stop signal is transmitted from the central control device 101. Can be stopped. At that time, by specifying the control device 38 of the group included in the command signal or the related slat group registered in advance, the operation of only the minimum slat group that needs to avoid interference is stopped. Can do.

  In the above example, each slat 26 is supported by the slat holder 22. However, the present invention is not limited to this. Even if each slat 26 is supported by a ladder cord as a slat support member, the same applies. It is applicable to.

DESCRIPTION OF SYMBOLS 10 Blind 12 Support drive part 22 Slat holder 26 Slat 32 Encoder (abnormality detection means)
38 Control device (control unit)
40 Controller (command means)
42 signal line 44 voltage / current measurement unit (abnormality detection means)
101 Central control unit (command means)
106 Floor signal line G Slat group

Claims (7)

A plurality of slats (26) are held by the support drive unit (12) via the slat support members (22) to form one slat group (G), and a plurality of slat groups (G) are formed of the slats (26). The slat support member (22) is rotated by the drive of the support drive unit (12) corresponding to each slat group (G) and opened and closed by the slat (26) opened and closed. Blind,
Corresponding to each slat group (G), an abnormality detecting means (32, 44) for detecting an abnormality of the opening / closing operation of the slat (26) and a control unit (38) for controlling the opening / closing of the slat (26). Provided, the control units of the respective slat groups (G) are connected to each other, and an abnormal opening / closing operation of the slats (26) of at least one slat group (G) of the plurality of slat groups (G) is detected. When the abnormality detection means (32, 44) detects, a stop signal for stopping the operation is input to the control unit (38) of the slat group (G) related to the slat group (G) where the abnormality is detected. Blind characterized by being made.   The blind according to claim 1, wherein the related slat group (G) includes a slat group (G) arranged adjacent to the slat group (G) in which an abnormality is detected. A plurality of slats (26) are held by the support drive unit (12) via the slat support members (22) to form one slat group (G), and a plurality of slat groups (G) are formed of the slats (26). The slat support member (22) is rotated by the drive of the support drive unit (12) corresponding to each slat group (G) and opened and closed by the slat (26) opened and closed. Blind,
Corresponding to each slat group (G), an abnormality detecting means (32, 44) for detecting an abnormality of the opening / closing operation of the slat (26) and a control unit (38) for controlling the opening / closing of the slat (26). Provided, the control units of the respective slat groups (G) are connected to each other, and the control units (38) corresponding to the slat groups (G) are abnormal based on the detection signals from the abnormality detection means (32, 44). The blind is characterized in that the control unit (38) transmits a stop signal when it is detected.   The said control part transmits a stop signal with respect to the control part (38) of the slat group (G) arrange | positioned adjacent to the slat group (G) by which abnormality of the opening / closing operation | movement was detected. Item 3. The blind according to item 3.   The blind according to claim 3, wherein the control unit (38) transmits a stop signal to a slat group belonging to a predetermined group. A plurality of slats (26) are held by the support drive unit (12) via the slat support members (22) to form one slat group (G), and a plurality of slat groups (G) are formed of the slats (26). The slat support member (22) is rotated by the drive of the support drive unit (12) corresponding to each slat group (G) and opened and closed by the slat (26) opened and closed. Blind,
Corresponding to each slat group (G), an abnormality detecting means (32, 44) for detecting an abnormality of the opening / closing operation of the slat (26) and a control unit (38) for controlling the opening / closing of the slat (26). Provided, the control units of each slat group (G) are connected to each other,
Each slat group (G) can be opened and closed based on a command signal from the command means (40, 101). The command signal includes a signal designating a slat group (G) to be opened and closed, and a slat. An opening / closing command signal for commanding the opening / closing operation of the group (G) is included;
When the control unit (38) corresponding to the slat group (G) detects an abnormality based on the detection signal from the abnormality detection means (32, 44), the control unit (38) transmits a stop signal, and the stop signal Includes a signal for designating a slat group (G) designated by the command signal and a stop command signal for commanding stop of operation. A plurality of slats (26) are held by the support drive unit (12) via the slat support members (22) to form one slat group (G), and a plurality of slat groups (G) are formed of the slats (26). The slat support member (22) is rotated by the drive of the support drive unit (12) corresponding to each slat group (G) and opened and closed by the slat (26) opened and closed. Blind,
Corresponding to each slat group (G), an abnormality detecting means (32, 44) for detecting an abnormality of the opening / closing operation of the slat (26) and a control unit (38) for controlling the opening / closing of the slat (26). Provided, the control units of each slat group (G) are connected to each other,
Each slat group (G) can be opened and closed based on a command signal from the command means (40, 101). The command signal includes a signal designating a slat group (G) to be opened and closed, and a slat. An opening / closing command signal for commanding the opening / closing operation of the group (G) is included;
When the control unit (38) corresponding to the slat group (G) detects an abnormality based on the detection signal from the abnormality detection means (32, 44), the control unit (38) transmits a stop signal, and the stop signal Includes a signal designating a predetermined related slat group and a stop command signal for commanding stop of operation.

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