JP5810751B2 - Shutter device - Google Patents

Description

  The present invention relates to a shutter device such as a blind shutter having a sensing unit on the front end side of a shutter curtain.

  The shutter device has a guide rail opposed to each other, a shutter curtain having a seat plate portion on the tip end side, which can move along the guide rail and can be opened and closed, and a drive having a drive motor for opening and closing the shutter curtain. A mechanism, a landing sensor that detects that the seat plate portion of the shutter curtain has landed on the floor side, a sensor pressing portion that is provided on the shutter curtain and that is turned on by pressing the landing sensor when the shutter curtain is closed, and the shutter curtain A sensing unit provided on the front end side so as to be rotatable with respect to the shutter curtain via a rotation shaft, and when the motor load of the drive motor exceeds a predetermined value during the shutter curtain closing operation, the shutter curtain is reversed. And a control unit that executes a pinching determination process for stopping the shutter curtain. Document 1).

JP 2008-240284 A

  When the shutter curtain is closed, it is detected that the seat plate portion on the front end side of the shutter curtain has landed on the floor side by the sensor pressing portion of the shutter curtain pressing the landing sensor to turn it on. However, when the shutter device is actually used, there is a possibility that foreign matter may be caught between the shutter curtain that performs the closing operation and the floor side. In such a case, a threshold value related to the motor load of the drive motor is set in advance as a function of detecting the inclusion of a foreign object during the shutter curtain closing operation. When the shutter curtain is in the closing operation and the load of the drive motor exceeds the threshold value, the control unit recognizes that the shutter curtain has caught a foreign object, and stops or reverses the shutter curtain closing operation. Open operation. Thereby, the shutter curtain can cope with the foreign matter.

However, when an actual shutter device is used, there may be a case where foreign matter is present unevenly on the left and right ends of the shutter curtain. In this case, the following inconvenience may occur. That is, when the sensing portion of the distal end side of the shutter curtain sandwiched foreign matter, there is a possibility that the right and left end portions of the shutter curtain is inclined. That is, the end on the side close to the foreign substance of the left and right ends of the shutter curtain cannot be lowered any further. However, the lowering of the left and right end portions of the shutter curtain on the side opposite to the foreign object can often proceed. For this reason, there is a possibility that the left and right ends of the shutter curtain may be tilted while the foreign matter is caught in the shutter curtain. In this case, when the landing sensor is provided on only one of the two guide rails, the lower part of the slope of the shutter curtain is located below the upper part of the slope. In other words, the shutter curtain may turn on the landing sensor even though the seat plate on the front end side of the shutter curtain does not normally land on the floor side. In this case, the control unit may erroneously determine that the shutter curtain has landed on the floor side even though a foreign object is sandwiched by the shutter curtain.

  Therefore, conventionally, in order to avoid such erroneous determination, landing sensors are provided on both of the two guide rails provided on the left and right sides of the shutter curtain. This is convenient because it is not determined that the seat plate portion of the shutter curtain has landed on the floor side unless both landing sensors are turned on. Thus, if two landing sensors are not provided on the left and right, the landing of the shutter curtain is erroneously detected.

  However, in this case, landing sensors are required for each of the guide rails on the left and right sides of the shutter curtain. That is, at least two landing sensors are required. Furthermore, at least two signal lines for transmitting the signals of the landing sensors to the control unit are required. For this reason, the structure is complicated and the price is increased.

  It is also conceivable to install one landing sensor at the center on the floor side so as to correspond to the center in the left-right direction of the shutter curtain. However, in this case, it is difficult to wire the landing sensor, which may increase the price. In addition, when the shutter curtain is opened, a path directly below the shutter curtain is generally a passage, which may damage the wiring of the landing sensor.

  The present invention has been made in view of the above circumstances, and even when the landing sensor is provided on only one of the guide rails, of course, when the landing sensor is provided on both of the guide rails. It is an object of the present invention to provide a shutter device that is advantageous in preventing erroneous detection of foreign object pinching by the shutter curtain.

(1) A shutter device according to an aspect 1 of the present invention includes guide rails that face each other, a shutter curtain that has a seat plate portion at a tip end side thereof and that can move along the guide rail and can be opened and closed, and a shutter curtain. A drive mechanism having a drive motor for opening and closing, a landing sensor provided on the guide rail for detecting that the seat plate portion of the shutter curtain has landed on the floor side, and a landing sensor provided on the shutter curtain when the shutter curtain is closed The sensor pressing unit that is turned on by pressing the button, the rotation shaft provided on the shutter curtain or the seat plate portion, and the rotation shaft provided on the front end side of the shutter curtain so as to be rotatable with respect to the shutter curtain. When the motor load of the drive motor exceeds a specified value when the shutter and the shutter curtain are closed, the shutter curtain is reversed. Or allowed to open operate, or has a control unit for executing the pinching determination process to stop the shutter curtain,
When the sensing unit comes into contact with a foreign object, the sensing unit is rotated about the rotation axis, and the closing operation of the sensor pressing unit is suppressed to prevent the sensor pressing unit from pressing the landing sensor .

According to this aspect, when the closing operation of the shutter curtain is normal, with the closing movement of the shutter curtain, since the sensor pressing portion provided on the shutter curtain is actuated in the closing direction together with the shutter curtain, the sensor pressing section Presses the landing sensor. Thereby, the landing sensor can detect the landing on the floor side of the seat plate portion of the shutter curtain. The detection signal of the landing sensor is input to the control unit. Thereby, the control part can recognize the landing to the floor side of the seat board part of a shutter curtain.

According to this aspect, if the sensing part during the closing operation of the shutter curtain is brought into contact with foreign matter, the sensing unit which operates in the closing direction together with the shutter curtain abuts against the foreign material. When the sensing unit comes into contact with a foreign object, the sensing unit rotates about the rotation axis, suppresses the closing operation of the sensor pressing unit, and prevents the sensor pressing unit from pressing the landing sensor . Therefore, the sensor pressing unit on the shutter curtain side is prevented from erroneously pressing the landing sensor. Therefore, the landing sensor can be prevented from being erroneously detected if the shutter curtain has landed even though the seat plate portion of the shutter curtain has not landed on the floor side.

  (2) According to the shutter device according to aspect 2 of the present invention, in the above aspect, the shutter curtain is closed to partition the outside from the room, and the center of gravity of the sensing unit is such that the front end of the sensing unit faces the outdoor side. When the shutter curtain is normally closed and operated, the seat plate part lands on the floor side, but the front end part of the sensing part is on the floor. The structure does not land on the side.

  According to this aspect, the center of gravity of the sensing unit is located on the indoor side of the rotation shaft so as to bias the tip of the sensing unit toward the outdoor side. In this way, the tip of the sensing unit is biased toward the outdoor side, and when the shutter curtain is normally closed, the sensing unit is lowered, but the tip of the sensing unit is on the floor side. It is arranged at a position where it does not land. Therefore, the rotation of the sensing unit can be suppressed. Thus, since rotation of the sensing part is suppressed, the sensor pressing part can operate in the closing direction. Therefore, the sensor pressing portion operates in the closing direction together with the shutter curtain. Thus, when the sensor pressing portion operates in the closing direction, the landing sensor is pressed. Thereby, the landing sensor can detect the landing on the floor side of the seat plate portion of the shutter curtain. As described above, the detection signal of the landing sensor is input to the control unit. Thereby, the control part can recognize the landing to the floor side of the seat board part of a shutter curtain.

( 3 ) According to the shutter device according to aspect 3 of the present invention, in the above aspect, the sensing unit has a structure including a reinforcing rib that forms a hollow space . During the closing operation of the sheet Yattakaten sometimes sensing unit which operates in the closing direction together with the shutter curtain abuts against the foreign material. For this reason, the sensing unit is required to have strength and rigidity. Therefore, according to this aspect, the sensing unit has a structure including a reinforcing rib that forms a hollow space, not a simple plate material. For this reason, the strength and rigidity of the sensing unit are increased, and damage to the sensing unit is suppressed.

According to the shutter device according to the present invention, when the sensing part at the time of the closing operation of the shutter curtain is brought into contact with foreign matter, the sensing unit which operates in the closing direction together with the shutter curtain abuts against the foreign material. When the sensing unit comes into contact with a foreign object, the sensing unit rotates about the rotation axis, suppresses the closing operation of the sensor pressing unit, and prevents the sensor pressing unit from pressing the landing sensor . Accordingly, the sensor pressing unit is prevented from erroneously pressing the landing sensor. Therefore, the landing sensor can be prevented from being erroneously detected if the shutter curtain has landed even though the seat plate portion of the shutter curtain has not landed on the floor side.

  According to such a shutter device of the present invention, even when the landing sensor is provided on only one of the guide rails, of course, when the landing sensor is provided on both of the guide rails. This is also advantageous in preventing erroneous detection of foreign matter caught by the shutter curtain.

It is a front view of a shutter device. It is sectional drawing of the shutter apparatus in the middle of the shutter curtain normally closing-operation. It is a front view of the shutter apparatus in the middle of the shutter curtain normally closing. It is sectional drawing which shows the state in which a shutter curtain is normally closed and the seat board part has landed on the lower frame. It is a front view which shows the state which the shutter curtain closed normally, and the seat board part has landed on the lower frame. It is sectional drawing which shows the state which the front-end | tip part of the detection part of a shutter curtain rotates and has landed on the lower frame. It is sectional drawing which expands and shows the principal part of FIG. It is a front view which shows the state which the front-end | tip part of the detection part of a shutter curtain rotated and landed on the lower frame.

  Embodiments of the present invention will be described below with reference to the drawings. For simplification of the drawing, there is a part where a broken line is shown as a solid line. As shown in FIG. 1, the shutter device according to the present embodiment is provided with two guide rails 1 that are provided on the left and right so as to face each other and extend in the height direction (arrow H direction), and moves along the guide rail 1. The shutter curtain 2 that can be opened and closed in the direction of the arrow H1 (upward) and the direction of the arrow H2 (downward), the drive mechanism 4 for opening and closing the shutter curtain 2, and the seat plate portion on the front end side of the shutter curtain 2 A landing sensor 5 for detecting that 25 has landed on the floor-side lower frame 12 and a control unit 6 for controlling the operation of the shutter device are provided. A landing signal detected by the landing sensor 5 is input to the control unit 6.

  As shown in FIG. 1, the drive mechanism 4 includes a winding body 40 having an axis P1 along the horizontal direction, and a drive motor 41 for rotating the winding body 40 about the axis P1. A motor load sensor 42 that detects the motor load of the drive motor 41 is provided in the drive motor 41. The motor load of the drive motor 41 is detected by the motor load sensor 42, and the motor load signal is input to the control unit 6. When the shutter curtain 2 moves in the direction of the arrow H2 and closes, the control unit 6 executes a pinching determination process. In the pinching determination process, the control unit 6 constantly detects the motor load of the drive motor 41. When the detected motor load exceeds the threshold value, the control unit 6 promptly changes the drive direction of the drive motor 41. A signal for stopping the shutter curtain 2 by stopping the driving of the driving motor 41 by outputting the shutter curtain 2 in the direction of the arrow H <b> 1 by being reversed is output to the driving circuit of the driving motor 41.

Here, when the shutter curtain 2 performs the closing operation in the direction of the arrow H2, the driving motor 41 is driven when the front end side of the shutter curtain 2 comes into contact with a foreign object and the closing operation of the shutter curtain 2 is restricted. Nevertheless, the closing operation of the shutter curtain 2 is limited. In this case, since the motor load of the drive motor 41 increases rapidly and exceeds the threshold value, the control unit 6 can determine that “foreign matter is caught”. When the foreign object is detected, the control unit 6 reverses or stops the driving of the drive motor 41 as described above. As shown in FIG. 3, the shutter curtain 2 is formed by juxtaposing a plurality of slats 20 extending in the horizontal direction along the arrow L direction along the height direction (arrow H direction) by the suspension member 22. ing. Engagement pins 20 w project from the ends of the slats 20. In FIG. 3, the tip 30 e of the sensing unit 3 of the shutter curtain 2 floats a distance LB from the floor-side lower frame 12.

  2 and 3 show a state in which the shutter curtain 2 is normally closed in the direction of the arrow H2. As shown in FIGS. 2 and 3, the shutter curtain 2 has a first bracket 23 having a flange 23 t on the tip side thereof, and further, a seat plate portion 25 is provided via the first bracket 23. Have. The first bracket 23 has a fin portion 24x. If the shutter curtain 2 is normally closed, the landing surface 26 formed at the lower end portion of the seat plate portion 25 will land on the floor-side lower frame 12. During the closing operation described above, the control unit 6 performs a pinching determination process. The seat plate portion 25 of the shutter curtain 2 is provided with a rotation shaft 27 extending in the horizontal direction. The sensing portion 3 is provided on the seat plate portion 25 via the rotation shaft 27 so as to be rotatable in the directions of arrows A1 and A2. The sensing unit 3 can rotate around the rotation shaft 27 in a direction toward the indoor 71 (arrow A1 direction) and a direction toward the outdoor 72 (arrow A2 direction). As shown in FIG. 2, the center of gravity G of the sensing unit 3 is more in the room 71 than the center axis of the rotary shaft 27 so as to bias the tip 30e of the sensing unit 3 toward the outdoor 72 side (in the direction of arrow A2). Located on the side. In this case, when gravity acts on the sensing unit 3, an urging force FA (see FIG. 2) that rotates the tip 30e of the sensing unit 3 in the direction toward the outdoor 72 (in the direction of arrow A2) acts on the sensing unit 3. ing.

  As shown in FIG. 2, the sensing unit 3 includes a plate part 30 having a tip part 30 e that is the tip side of the sensing part 3, and reinforcing ribs 32 that are connected to the plate part 30 and form a hollow space 31. The reinforcing rib 32 has a rib portion 32a, a rib portion 32b, and a rib portion 32c. Since the rib portion 32c is engaged with the engaging portion 23k of the bracket 23, even if the urging force FA acts on the sensing portion 3, the sensing portion 3 rotates further to the outdoor 72 side (arrow A2 direction). It cannot move and maintains the posture shown in FIG. Therefore, when the shutter curtain 2 is normally closed in the direction of the arrow H2, as shown in FIG. 4, the landing surface 26 of the seat plate portion 25 lands on the lower frame 12 on the floor side, but the front end of the sensing portion 3 The portion 30e is structured not to land on the lower frame 12 on the floor side.

  As shown in FIG. 2, a sensor pressing portion 24 is provided on the fin portion 24 x of the first bracket 23 of the shutter curtain 2. When the shutter curtain 2 moves in the direction of the arrow H2 and is normally closed (without foreign matter being caught), the sensor pressing unit 24 operates to press the sensor unit 50 of the landing sensor 5 in the direction of the arrow B1. Can be turned on. In this case, the landing sensor 5 causes the control unit 6 to output a landing signal via the signal line. The sensor unit 50 of the landing sensor 5 has an inclined pressing surface 50p.

Further explanation will be added. A case where the shutter curtain closing operation is normal is a first mode, and a case where the sensing unit is in contact with a foreign object during the shutter curtain closing operation is a second mode. 4 and 5 show a first mode when the closing operation in which the shutter curtain 2 moves in the arrow H2 direction is normal. According to the first embodiment, as the shutter curtain 2 is closed and moved in the arrow H2 direction, the seat plate part 25 and the sensor pressing part 24 are moved in the same direction (arrow H2 direction) together with the shutter curtain 2. When the shutter curtain 2 is normally closed in the direction of the arrow H2, as shown in FIG. 4, the seat plate portion 25 of the shutter curtain 2 that has been closed normally lands on the lower frame 12 on the floor side. In this case, the sensor pressing unit 24 on the shutter curtain 2 side turns on the sensor unit 50 of the landing sensor 5 by pressing it in the direction of the arrow B1 (see FIGS . 2 and 4). When turned on, the sensor unit 50 is accommodated in the landing sensor 5. Thus, when the landing sensor 5 is pressed and turned on, the landing sensor 5 can detect the fact that the seat plate portion 25 of the shutter curtain 2 has landed on the lower frame 12 on the floor side. Such a landing signal of the landing sensor 5 is input to the control unit 6 via a signal line (not shown). According to the first embodiment, as can be understood from FIGS. 4 and 5, the tip portion 30 e of the sensing unit 3 does not substantially rotate toward the room 71 (in the direction of the arrow A <b> 1). Since the front end portion 30e is lowered in the arrow H2 direction as it is along the vertical direction, the shutter curtain 2 is closed (see FIG. 4).

In this case, since the distal end portion 30e of the sensing unit 3 is not in contact with the foreign object, the distal end portion 30e of sensitive knowledge part 3 without having to rotate in the arrow A1 direction, as shown in FIG. 4, it is lowered in the arrow direction H2 To do. For this reason, the front-end | tip part 30e of the sensing part 3 approachs below the lower frame 12 of a floor side (arrow H2 direction). As a result, as shown in FIG. 4, the lower frame 12 is covered by the distal end portion 30 e of the sensing unit 3, and is hidden from the intruder on the outdoor 72 side, and thus on the outdoor 72 side. According to the first embodiment, as can be understood from FIG. 4, the intruder on the outdoor 72 side cannot see the lower frame 12 on the floor side, and the lower frame 12 is covered by the sensing unit 3. Since it is concealed from the outdoor 72, it is possible to prevent a tool such as a bar from being inserted near the lower frame 12.

According to this embodiment, the shutter curtain 2 partitions the outdoor 72 and the indoor 71 in a closed state (see FIG. 4). The center of gravity G of the rotatable sensing unit 3 is located closer to the room 71 than the rotary shaft 27 so as to urge the tip 30e of the sensing unit 3 toward the outdoor 72 in the direction of arrow A2. For this reason, when the shutter curtain 2 is normally closed in the direction of the arrow H2, the urging force FA that urges the distal end portion 30e of the sensing unit 3 toward the outdoor 72 side acts on the sensing unit 3. Since the shutter curtain 2 is closed in the direction of the arrow H2 while the urging force FA is applied to the sensing unit 3, even when the shutter curtain 2 is closed, the leading end 30e of the sensing unit 3 is lowered from the lower frame 12 on the floor side. The distance LA is spaced apart from the lower frame 12.

  On the other hand, FIGS. 6 to 8 show a second form in which foreign objects are caught by the shutter curtain 2 when the shutter curtain 2 is closed in the direction of the arrow H2. As the shutter curtain 2 closes and moves in the direction of the arrow H2, the sensor pressing portion 24 moves in the same direction (arrow H2 direction) together with the shutter curtain 2. However, since foreign matter exists below the shutter curtain 2, the tip 30e of the sensing unit 3 of the shutter curtain 2 is in contact with the foreign matter. Upon contact, the tip 30e of the sensing unit 3 rotates about the rotation shaft 27 in the direction of arrow A1 (see FIG. 6) toward the room 71. In this case, the rib portion 32c of the reinforcing rib 32 abuts on the stopper portion 250 of the seat plate portion 25 (see FIG. 6), and further rotation of the sensing portion 3 in the arrow A1 direction is prevented. As described above, when the sensing unit 3 rotates in the direction of the arrow A1, even if the shutter curtain 2 is further closed in the direction of the arrow H2, as can be understood from FIG. Prior to the timing of pressing (turning on) the sensor unit 50 of the sensor 5, the tip 30e of the sensing unit 3 lands on the floor-side lower frame 12 (see FIG. 6). In this state, the shutter curtain 2 together with the sensor pressing portion 24 and the seat plate portion 25 is prevented from further closing in the arrow H2 direction. As a result, the sensor pressing portion 24 provided on the shutter curtain 2 is prevented from pressing (turning on) the sensor portion 50 of the landing sensor 5 in the direction of the arrow B1.

  As described above, according to the present embodiment, according to the first embodiment in which the closing operation of the shutter curtain 2 is normal, the sensor pressing portion 24 provided in the shutter curtain 2 with the closing movement of the shutter curtain 2. Operates in the closing direction (arrow H2 direction) together with the shutter curtain 2, so that the sensor pressing portion 24 presses the landing sensor 5 in the arrow B1 direction. Thereby, the landing sensor 5 can detect the landing on the floor side of the seat plate portion 25 of the shutter curtain 2. A detection signal from the landing sensor 5 is input to the control unit 6. Thereby, the control part 6 can recognize the landing to the lower frame 12 of the floor side of the seat board part 25 of the shutter curtain 2. FIG. If the seat plate portion 25 of the shutter curtain 2 normally lands on the lower frame 12 in this way, it is not necessary to detect foreign object pinching. Therefore, the control unit 6 performs pinching that has been performed during the shutter curtain 2 closing operation. Cancels the judgment process.

Then added described second embodiment in the case where the sensing portion 3 at the time of closing operation of the shutter curtain 2 contacts the foreign matter. In this case, the sensing unit 3 that operates in the closing direction in the arrow H2 direction together with the shutter curtain 2 contacts the foreign matter, and the sensing unit 3 rotates in the arrow A1 direction about the rotation shaft 27. As a result, the seat plate part 25 and the sensor pressing part 24 together with the shutter curtain 2 are suppressed from further descending in the closing direction (arrow H2 direction). For this reason, it is prevented that the sensor pressing unit 24 erroneously presses (turns on) the landing sensor 5 even though a foreign object is sandwiched. For this reason, although the seat plate part 25 has not normally landed on the lower frame 12, the erroneous determination that it has landed is not performed. In this case, since the landing sensor 5 is not turned on, the control unit 6 does not stop the pinch determination process, and the control unit 6 continues the pinch determination process. Accordingly, when the motor load of the drive motor 41 increases rapidly due to the pinching, the control unit 6 determines whether to drive the drive motor 41 or stops it.

  As described above, according to the present embodiment, when the shutter curtain 2 is closed in the direction of the arrow H2, in the second mode in which the sensing unit 3 of the shutter curtain 2 abuts against the foreign matter, the sensing unit 3 abuts against the foreign matter and hits it. Along with the contact, it rotates around the rotation shaft 27 and lands on the floor-side lower frame 12, and the sensor pressing portion 24 prevents the landing sensor 5 from being pressed (turned on) in advance. Accordingly, it is possible to prevent the landing sensor 5 from being erroneously turned on by the sensor pressing portion 24 even though a foreign object is sandwiched between the shutter curtain 2 that is closed and the floor side. That is, the landing sensor 5 is prevented from outputting a signal indicating that the seat plate portion 25 of the shutter curtain 2 has landed on the lower frame 12 on the floor side, and the pinching determination process is not stopped.

  If foreign matter is caught by the shutter curtain 2, the sensing unit 3 may be tilted left and right depending on the thickness of the foreign matter. 6 and 7, since the foreign matter is caught by the shutter curtain 2, the sensing unit 3 rotates toward the room 71 (in the direction of the arrow A <b> 1), but then the foreign matter is removed and the sensing unit 3 of the shutter curtain 2. Indicates a state of being in a normal posture. Even when the foreign matter is not removed, the control unit 6 continues to execute the pinching determination process unless the landing sensor 5 is turned on. Therefore, when the motor load increases above the threshold value, the control unit 6 controls the drive motor 41. Is immediately reversed and the shutter curtain 2 is opened in the direction of the arrow H1, or the drive motor 41 is stopped. This avoids damage to the sensing unit 3 and foreign matter.

As described above, according to the present embodiment, since the erroneous operation of the landing sensor 5 is reliably prevented by the rotation of the lower frame member 3, unlike the above-described prior art, the landing is performed on both the left and right guide rails 1. Needless to provide the sensors 5, it is sufficient to provide the landing sensors 5 on either one of the left and right guide rails 1 . Therefore, the number of landing sensors 5 can be reduced, the signal line attachment of the landing sensors 5 can be simplified, and the cost can be reduced. Of course, the landing sensors 5 may be provided on both the left and right guide rails 1 .

In the second embodiment described above, the shutter curtain 2 tends to descend in the direction of the arrow H1 in a state where the tip 30e of the sensing unit 3 rotated in the direction of the arrow A1 has landed on the lower frame 12 on the floor side. In this case, if the sensing unit 3 has a simple plate shape, it may be deformed due to insufficient strength and rigidity. In this regard, according to the present embodiment, the sensing unit 3 includes the reinforcing rib 32 that forms the hollow space 31 (see FIG. 2) , and the strength and rigidity are enhanced, so that damage to the sensing unit 3 is avoided. Is done.

(Other)
The present invention is not limited to the embodiments described above and shown in the drawings, and can be implemented with appropriate modifications within the scope not departing from the gist. The sensing unit 3 includes the reinforcing rib 32 that forms the hollow space 31, but may not include the reinforcing rib. The shutter can be applied to a blind shutter, a shutter having no blind function, or the like.

  1 is a guide rail, 12 is a lower frame, 2 is a shutter curtain, 20 is a slat, 22 is a suspension member, 24 is a sensor pressing part, 25 is a seat plate part, 26 is a landing, 27 is a rotation axis, and 3 is sensing Part, 30e is a tip part, 31 is a hollow space, 32 is a reinforcing rib, 4 is a drive mechanism, 40 is a winding body, 41 is a drive motor, 42 is a motor load sensor, 5 is a landing sensor, 50 is a sensor part, 6 Is a control unit, 71 is indoors, and 72 is outdoor.

Claims (3)

Guide rails that oppose each other, a shutter curtain that has a seat plate portion on the front end side and that can move along the guide rail and can be opened and closed, and a drive mechanism that has a drive motor for opening and closing the shutter curtain A landing sensor provided on the guide rail for detecting that the seat plate portion of the shutter curtain has landed on the floor side, and is turned on by pressing the landing sensor provided on the shutter curtain when the shutter curtain is closed. A sensor pressing portion to be rotated, a rotation shaft provided on the shutter curtain or the seat plate portion, and provided on the front end side of the shutter curtain so as to be rotatable with respect to the shutter curtain via the rotation shaft. And when the motor load of the drive motor exceeds a predetermined value when the shutter curtain is closed, Either by opening operation by inverting the Yattakaten, or has a control unit for executing the pinching determination process to stop the shutter curtain,
The detection unit is rotated around the abutting Then the pivot shaft to the foreign matter, the sensor pressing portion suppresses the closing operation of the front Symbol sensor pressing portion is prevented from pressing the landing sensor Shutter device.   2. The rotary shaft according to claim 1, wherein the shutter curtain is closed to partition the outdoor and indoors, and the center of gravity of the sensing unit is applied from the rotating shaft so as to bias the tip of the sensing unit toward the outdoor side. Is located on the indoor side, and when the shutter curtain is normally closed, the seat plate portion lands on the floor side, but the tip of the sensing portion does not land on the floor side. Shutter device. 3. The shutter device according to claim 1, wherein the sensing unit includes a reinforcing rib that forms a hollow space.

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