JP6070352B2 - Shutter device - Google Patents

Description

  The present invention relates to a shutter device having a function of detecting pinching when closing a shutter curtain.

  2. Description of the Related Art Conventionally, in a shutter device that opens and closes a shutter curtain by rolling it up and down with a drive motor or the like, a technology having a pinching detection function when closing the shutter curtain is conventionally known. For example, in the shutter device disclosed in Patent Document 1, a specific position detection unit that detects that a shutter curtain that operates in a closing direction has reached a specific position, and a drive that detects a drive amount of a drive unit that drives the shutter curtain. An amount detection unit; a load detection unit that detects a driving load of the drive unit; and a pinching detection unit that determines whether an obstacle is pinched based on pinching detection sensitivity.

  As the specific position detecting means, a seating detection switch for detecting that the seat plate at the lower end of the shutter curtain has landed is frequently used. As the drive amount detection means, means for counting the number of pulses indicating the rotation amount of the drive motor is generally used. As the load detection means, a sensor for detecting a load current flowing in the drive motor is used. When it is determined by the specific position detection means or the drive amount detection means that the seat plate has not yet landed, if the drive load detected by the load detection means exceeds a predetermined threshold, the pinching detection means It is determined that an obstacle is caught. At this time, the shutter curtain is reversed in the stop or open direction. By providing such a pinching detection function, the reliability and safety of the shutter device are enhanced.

  The applicant of the present application discloses a shutter device with a blind function in Patent Document 2. This shutter device has a blind function for opening and closing a plurality of slats constituting the shutter curtain. The blind opening operation for opening the slat and holding it at a desired opening angle, or the shutter fully closing operation for fitting the slats to each other in the fully closed state, causes the drive source such as the drive motor to move in the winding direction and the unwinding direction. This is done by applying operating force.

JP 2008-240284 A JP 2008-240363 A

  By the way, the seating detection switch used for the pinching detection function in Patent Document 1 or the like is disposed near the lower end of one of the pair of guide rails erected in parallel with a distance to guide the raising and lowering of the shutter curtain. It is common. For this reason, if an obstacle is caught in the vicinity of the other guide rail where the seating detection switch is not provided, this may not be detected. This is because the seating plate descends while tilting and can turn on the seating detection switch away from the obstacle, so that it is determined that the seating is seated by mistake. In order to prevent this erroneous determination, it is necessary to provide seating detection switches on the guide rails on both sides or in the vicinity of the middle in the width direction of the shutter curtain. In the former case, an extra seating detection switch is required, and in the latter case, wiring to the seating detection switch is required, both of which are expensive.

  In addition, when the pinching detection function is provided in the shutter device with the blind function exemplified in Patent Document 2, the method using the load detection means delays the detection of the obstacle pinching. In other words, even if the seat plate comes into contact with the obstacle, the load does not increase sharply, and the load gradually increases as the slats are gradually fitted together. Cannot be detected.

  Furthermore, it is difficult to eliminate the above-described problems of erroneous determination of pinching and detection delay even when a driving amount detecting means such as counting the number of pulses of the driving motor is used.

  The present invention has been made in view of the above-described problems of the background art, and an object to be solved is to provide an inexpensive shutter device that can reliably detect an obstacle being caught when the shutter curtain is closed.

  The shutter device according to the present invention includes a pair of guide rails erected in parallel with each other, a shutter case disposed on an upper end side of the pair of guide rails and having a storage chamber formed therein, and the pair of guide rails A frame having a lower frame disposed on the lower end side of the frame and an open state accommodated in the storage chamber, and a seat plate held at the lower end being lowered to the lower frame while being guided by the pair of guide rails and being closed A shutter curtain, a seating detection switch disposed near the lower end of one of the guide rails and capable of detecting the closed state of the shutter curtain, the seat plate, the seat plate being attached to the lower frame And a seating detection member that pushes the seating detection switch when landing, spanned between the pair of guide rails and swingable or movable on the seat plate. A push control member that is held in a swing state and changes state from a restricted state that restricts the push operation of the seating detection switch by the seating detection member to an allowable state that allows the push operation, and the other A state switching member that is disposed near the lower end of the guide rail and that switches or moves the push control member when the seat plate approaches the lower frame to switch from the restricted state to the allowed state. Further provided.

  Further, the push control member is swingably held by the seat plate, and has a guided portion at the other end close to the other guide rail. The state switching member includes the seat plate and the lower frame. A guide portion that guides the guided portion to swing the push-motion control member when approaching the first guide rail, and is disposed near a lower end of the one guide rail, so that the push-motion in the restricted state A block member may be provided that restricts the lowering of the control member and permits the lowering of the pushing control member in the allowable state.

  Alternatively, the push control member is swingably held on the seat plate, has a guided portion at the other end close to the other guide rail, and the seating detection at one end close to the one guide rail. The state switching member may include a guide portion that guides the guided portion and swings the pushing control member when the seat plate approaches the lower frame.

  The push control member is held by the seat plate so as to be horizontally movable, and has a guided portion at the other end close to the other guide rail. The state switching member includes the seat plate and the lower frame. A guide portion that guides the guided portion and moves the push-motion control member horizontally when approaching the guide, and is disposed near a lower end of the one guide rail, and is pushed in the restricted state. A block member may be provided that restricts the lowering of the control member and permits the lowering of the pushing control member in the allowable state.

  Alternatively, the push control member is held on the seat plate so as to be horizontally movable, has a guided portion at the other end close to the other guide rail, and detects the seating at one end close to the one guide rail. The state switching member may include a guide portion that guides the guided portion and horizontally moves the push control member when the seat plate approaches the lower frame.

  Further, one of the guided portion and the guide portion is a cam figure including an inclined groove or an inclined surface, and the other of the guided portion and the guide portion is guided by the inclined groove or the inclined surface. A cam follower is preferred.

  The shutter case further includes a winding body that winds up the shutter curtain, and a drive motor that rotationally drives the winding body so as to be able to switch between normal rotation and reverse rotation. The load of the drive motor is sensed while the shutter curtain is being rolled down and the seating detection switch is not detecting the landing of the seat plate on the lower frame, and the load exceeds a predetermined threshold value. It may further comprise load sensing control means for reversing or stopping the winding body when it is turned on.

  In the shutter device of the present invention, when the seat plate comes close to the lower frame when the shutter curtain is rolled down and closed from the storage chamber, the state switching member normally swings or moves the push control member to allow from the restricted state. Change state to state. Therefore, when the seat plate lands on the lower frame, the seating detection member pushes the seating detection switch. Thereby, the closed state of the shutter curtain can be detected correctly. On the other hand, when the obstacle is in a position close to one guide rail on the upper side of the lower frame, the seating detection member does not push the seating detection switch because the one side of the seat plate cannot sandwich the obstacle and descend. Thereby, it is possible to correctly detect the state in which the shutter curtain sandwiches the obstacle. Also, when the obstacle is near the middle of the pair of guide rails on the upper side of the lower frame or close to the other guide rail, the other end of the push control member does not descend, so the state switching member does not act and the restricted state is maintained. Maintained. Therefore, the seating detection member does not push the seating detection switch. Thereby, it is possible to correctly detect the state in which the shutter curtain sandwiches the obstacle.

  As described above, if there is an obstacle on the upper side of the lower frame when closing the shutter curtain, the pinching can be reliably detected regardless of the position. Furthermore, since only one seating detection switch needs to be provided on one guide rail, it is not necessary to provide a seating detection switch on each of the guide rails, and a seating detection switch is provided near the middle of the pair of guide rails. There is no need for troublesome wiring. Therefore, an inexpensive shutter device can be provided.

  Furthermore, in a mode in which the guided portion and the guide portion are a combination of a cam figure and a cam follower, the swinging or horizontal movement of the push control member is smoothly driven. Thereby, the reliability of the pinching detection function is improved.

  Further, in an aspect in which the shutter case has a winding body and a drive motor and further includes load detection control means, the shutter curtain is closed by using a method for detecting the load of the drive motor in addition to the seating detection switch. Detect. Then, when the seating detection switch does not detect the landing on the lower frame of the seat plate, when the load exceeds a predetermined threshold, it is determined that the obstacle is sandwiched, and the winding body is reversed or stopped. This further improves the reliability of the pinch detection function and further improves the operational safety of the shutter device.

It is a front view which shows the whole structure of the shutter apparatus of 1st Embodiment of this invention. It is the side sectional view which looked at the AA section of Drawing 1 from the direction of an arrow. It is the elements on larger scale which showed the detailed structure of the lower end side and a seat board of a pair of guide rail. It is side surface sectional drawing which showed the seating detection switch by the side of one guide rail, and the fin part (sitting detection member) by the side of a seat board. It is side surface sectional drawing which showed the rocking | swiveling member (pushing control member) by the side of a seat board, and the state switching member by the side of the other guide rail. It is a block diagram which shows the operation control system of a shutter apparatus. It is side surface sectional drawing which showed the operation | movement which a rocking | fluctuation member rock | fluctuates by the state switching member at the normal time without an obstruction. FIG. 8 is a side cross-sectional view illustrating a normal operation following FIG. 7. FIG. 9 is a side cross-sectional view illustrating a normal operation following FIG. 8. It is side surface sectional drawing which showed operation | movement of the rocking | swiveling member, fin part, and seating detection switch at the normal time. It is the figure which showed the condition when a seat board descend | falls when an obstruction exists in the position near the other guide rail. It is side surface sectional drawing which showed that a rocking | swiveling member does not rock | fluctuate when there exists an obstruction. It is side surface sectional drawing which showed operation | movement of the rocking | swiveling member, fin part, and seating detection switch when there exists an obstruction. In 2nd Embodiment, it is sectional drawing which looked at the AA cross section of FIG. 1 from the arrow direction. In 2nd Embodiment, it is the partial expanded front view which showed the detailed structure of the lower end side of a pair of guide rail, and a seat board. The figure which showed the condition in the middle of the state switching member (guide part) guiding a cam boss (guided part), and driving a slide member (pushing control member) from a control position to a permissible position at the time of normal without an obstacle. is there. It is the figure which showed the closed state of the shutter curtain which the seat board landed on the lower frame at the normal time without an obstruction. It is the figure which showed the condition in the middle of a descent | fall of a seat board, when an obstruction exists in the position near the other guide rail. It is the figure which showed the last situation where a seat board descend | falls when an obstruction exists in the position near the other guide rail. It is the partial expanded front view which showed the detailed structure of the lower end side of a pair of guide rail in 3rd Embodiment, and a seat board.

  A shutter device 1 according to a first embodiment for carrying out the present invention will be described with reference to FIGS. FIG. 1 is a front view showing the overall configuration of the shutter device 1 according to the first embodiment of the present invention. The shutter device 1 is provided for the purpose of opening and closing a doorway of a building. The shutter device 1 includes a frame 2, a shutter curtain 3, a seating detection switch 4, a fin portion 5 corresponding to a seating detection member, a swinging member 6 corresponding to a push control member, a state switching member 7, a block member 8, and a control. It consists of part 9 and the like. FIG. 1 illustrates a closed state in which the shutter curtain 3 is wound down. 2 is a side cross-sectional view of the AA cross section of FIG. 1 as viewed from the direction of the arrow. FIG. 2 illustrates the closed state of the shutter curtain 3. FIG. 3 is a partially enlarged front view showing the detailed structure of the lower side of the pair of guide rails 21 and 22 and the seat plate 32. In FIG. 3, the decorative plates 212 and 222 on the front side of the guide rails 21 and 22 are omitted. FIG. 3 illustrates a state where the shutter curtain 3 is slightly opened.

  The frame 2 includes a pair of guide rails 21 and 22, a shutter case 23, a lower frame 29, and the like. As shown in FIG. 1, the pair of guide rails 21, 22 is provided upright and spaced apart in parallel on both the left and right sides in the width direction of the opening such as the doorway. Guide plates 211 and 221 extend in the vertical direction near the inner sides of the guide rails 21 and 22. On the front side of each guide rail 21, 22, decorative plates 212, 222 are provided extending in the vertical direction. A box-shaped shutter case 23 is provided so as to span the upper ends of the pair of guide rails 21 and 22. A lower frame 29 is provided so as to connect the lower ends of the pair of guide rails 21 and 22. With the above configuration, the frame 2 has a rectangular opening.

  When the shutter curtain 3 is wound up and accommodated in the accommodation chamber 24, the shutter curtain 3 is in an open state in which the rectangular opening of the frame 2 is opened. When the shutter curtain 3 is lowered from the storage chamber 24 and guided by the pair of guide rails 21 and 22, the shutter curtain 3 is in a closed state in which the rectangular opening of the frame 2 is closed. The shutter curtain 3 is configured by vertically connecting a plurality of rectangular strip-like slats 31 that are horizontally long. The shutter curtain 3 has a seat plate 32 below the slat 31A at the lower end. The seat plate 32 stabilizes the landing on the lower frame 29 of the shutter curtain 3. The slat 31 </ b> B at the upper end of the shutter curtain 3 is locked to the winding body 25. In the first embodiment, each slat 31 is openable and closable and is provided with a blind function. However, the blind function is not an essential component.

  A storage chamber 24 for storing the shutter curtain 3 is formed inside the shutter case 23. The winding body 25 is disposed in the storage chamber 24 and is supported by the shutter case 23 so as to be rotatable around the axis AX. The winding body 25 can wind up the shutter curtain 3 on the outer peripheral surface.

  The electric drive device 26 is disposed in a cylindrical internal space of the winding body 25, and one end on the left side in the drawing is fixed to the shutter case 23. The electric drive device 26 has a drive motor 27 capable of switching between normal rotation and reverse rotation. A rotation transmission member 28 provided on the output shaft of the drive motor 27 rotates the inner periphery of the winding body 25. Operation and stop of the drive motor 27 and switching between normal rotation and reverse rotation are controlled by the control unit 9 (shown in FIG. 6). When the drive motor 27 rotates in the forward direction, the winding body 25 is driven to rotate in the forward direction, and the shutter curtain 3 is unwound from the storage chamber 24. Further, when the drive motor 27 is reversed, the winding body 25 is driven to be reversed, and the shutter curtain 3 is wound up and accommodated in the accommodation chamber 24.

  As shown in FIG. 3, brackets 321 and 322 are attached to both sides of the back surface of the seat plate 32, respectively. The brackets 321 and 322 initially extend outward in the width direction and are bent backward from the middle, and are slidable on the outer surfaces of the guide plates 211 and 221 in the width direction. Thereby, the movement of the seat plate 32 in the width direction is restricted, and the shutter curtain 3 moves up and down while being guided by the guide rails 21 and 22.

  The seating detection switch 4 is fixed by a bracket (not shown) near the lower end of one guide rail 22 erected on the left side in FIG. On the other hand, the bracket 322 attached to the left side of the seat plate 32 is formed with a fin portion 5 that is bent and extended forward from the lower edge in the horizontal direction. FIG. 4 is a side sectional view showing the seating detection switch 4 on one guide rail 22 side and the fin portion 5 on the seat plate 32 side. The fin portion 5 corresponds to the seating detection member of the present invention, and is disposed immediately above the seating detection switch 4. The fin portion 5 moves up and down integrally with the seat plate 32. When the seat plate 32 is landed on the lower frame 29, the fin 5 pushes down the switch operation unit 41 (shown with hatching in FIG. 3 for convenience) of the seating detection switch 4. Thereby, the seating detection switch 4 changes from the off state to the on state, and detects the closed state of the shutter curtain 3. The seating detection switch 4 sends off state or on state detection information to the control unit 9.

  As shown in FIG. 2, the swing member 6 is swingably held by the seat plate 32. More specifically, on the lower side of the seat plate 32, swing chambers 323 having a substantially rectangular cross-sectional space are formed discretely at a plurality of locations in the shutter width direction. Further, a support chamber 324 having a substantially circular cross-sectional space is formed near the upper rear side of the swing chamber 323. The bearing chamber 324 communicates with the swing chamber 323.

  The swing member 6 is a member that is long in the shutter width direction, and is spanned between the pair of guide rails 21 and 22. The oscillating member 6 has a substantially circular cross section and a plurality of supported portions 611 that are oscillaably held in the respective supporting chambers 324, and extends in the width direction within the oscillating chamber 323 continuously to the supported portions 611. It has an existing rocking body 612. The swinging main body 612 is formed in a groove shape in which a thin plate-like member is bent at two locations and opened rearward. The swing member 6 swings in the internal space of the swing chamber 323 within a limited angle range. As shown in FIG. 4, the swing member 6 is in a restricted state by being positioned on the rear side of the swing chamber 323 by the action of gravity in a free state where no external force is applied. Then, when an external force acts on the swing member 6 and swings forward as shown in FIG. 2, the state changes to an allowable state. The swing member 6 has a rigidity that does not cause a large deflection in the width direction of the shutter, and a substantially constant swing position is maintained from one end 616 to the other end 613 in the width direction.

  The swing member 6 has a cam boss member 614 at the other end 613 close to the other guide rail 21 erected on the right side in FIG. A tip end 615 formed thinly of the cam boss member 614 protrudes laterally from the other end of the seat plate 32. FIG. 5 is a side sectional view showing the swing member 6 on the seat plate 32 side and the state switching member 7 on the guide rail 21 side. As shown in FIG. 5, the distal end 615 of the cam boss member 614 of the swing member 6 is a cam follower having a roundness in the front-rear direction. The tip 615 of the cam boss member 614 corresponds to the guided portion of the present invention.

  The state switching member 7 is disposed near the lower end of the other guide rail 21. The state switching member 7 is disposed directly below the distal end portion 615 of the cam boss member 614. As shown in FIG. 5, the upper surface of the state switching member 7 is a cam figure having an inclined surface 711 whose front side is low and whose rear side is high. The inclined surface 711 of the state switching member 7 corresponds to the guide portion of the present invention, and guides the front end portion 615 of the descending cam boss member 614 forward. The front surface of the state switching member 7 is a vertical surface 712. The vertical surface 712 guides the distal end portion 615 of the cam boss member 614 downward after being guided forward.

  The block member 8 (shown with hatching in FIG. 3 for convenience) is provided on the inner side in the width direction near the lower end of one guide rail 22. The block member 8 is a box-shaped member. As shown in FIG. 3, the block member 8 is disposed directly below the left end 616 of the swing member 6. More specifically, as shown in FIG. 4, the block member 8 is disposed directly below the swing member 6 that is positioned on the rear side and is in a restricted state, and restricts the descent of the restricted swing member 6. To do. The block member 8 allows the lowering of the swinging member 6 that has swung forward and changed to an allowable state.

  Next, the operation control system of the shutter device 1 will be described. FIG. 6 is a block diagram showing an operation control system of the shutter device 1. The operation of the shutter device 1 is controlled by the control unit 9. The control unit 9 can be configured by an electronic control device that incorporates a CPU and operates by software. The control unit 9 is connected to the operation remote controller 91, the motor operation circuit 92, the current sensing unit 93, and the seating detection switch 4.

  The operation remote controller 91 is operated by a user, and transmits a user request to the control unit 9 using wireless communication. The control unit 9 itself is also provided with an operation button and can be operated. The motor operation circuit 92 is disposed between the motor power supply and the drive motor 27, and performs on / off operation of the motor power supply and forward / reverse switching operation based on a command from the control unit 9. The current sensing unit 93 senses the load current I flowing through the drive motor 27 and sends the sensing information to the control unit 9. Sensing the load current I corresponds to sensing the magnitude of the load of the drive motor 27. The load sensing method is not limited to sensing the load current I. For example, the load sensing method may be replaced with a method of sensing torque by providing a torque sensor on the output shaft of the drive motor 27. The seating detection switch 4 sends detection information to the control unit 9 as to whether the switch operating unit 41 is pushed by the fin unit 5 or in an off state where the switch operating unit 41 is not pushed.

  The control unit 9 controls the motor operation circuit 92 to open or close the shutter curtain 3 based on the operation of the operation remote controller 91 or the operation button. When the operation of opening the shutter curtain 3 and the seating detection switch 4 change from the off state to the on state, the control unit 9 determines that the shutter curtain 3 is in the closed state and stops the drive motor 27. The motor operation circuit 92 is controlled. Further, as a pinching detection function, the control unit 9 detects the sensing information of the current sensing unit 93 when the drive motor 27 rotates forward, the shutter curtain 3 is rolled down from the storage chamber 24, and the seating detection switch 4 is in the off state. To monitor. Then, when the seating detection switch 4 remains off and the load current I exceeds a predetermined threshold value, the control unit 9 determines that an obstacle is caught and reverses the drive motor 27 so as to reverse the drive motor 27. 92 is controlled. That is, the control unit 9 includes the load sensing control means of the present invention.

  Next, the operation, action, and effect of the shutter device 1 of the first embodiment will be described. In the opened state in which the shutter curtain 3 is rolled up and accommodated in the accommodation chamber 24, the user issues a request to close the shutter curtain 3 by operating the operation remote controller 91. Then, the control unit 9 rotates the drive motor 27 forward based on the request, the shutter curtain 3 is rolled down, and the state shown in FIG. 3 is obtained. From the state of FIG. 3, the shutter curtain 3 is further unwound and the seat plate 32 is lowered.

  Here, first, the other guide rail 21 on the right side at the normal time without the obstacle X1 is considered. FIG. 7 is a side cross-sectional view illustrating an operation in which the swing member 6 swings by the state switching member 7 in a normal state without the obstacle X1. FIG. 8 is a side sectional view showing a normal operation following FIG. 7, and FIG. 9 is a side sectional view showing a normal operation following FIG. As shown in FIG. 7, as the seat plate 32 is lowered, the tip 615 of the cam boss member 614 of the swinging member 6 abuts on the inclined surface 711 of the state switching member 7 and is guided forward. As a result, the entire swinging member 6 swings gradually forward from the restricted state located on the rear side shown in FIG. 4, and changes to the permissible state swinging forward on the side shown in FIG.

  When the seat plate 32 is further lowered, the leading end 615 of the cam boss member 614 is guided downward by the vertical surface 712 of the state switching member 7. Thereby, the rocking | swiveling member 6 descend | falls integrally with the seat board 32, maintaining a permission state. Then, as shown in FIG. 9, the seat plate 32 lands on the lower frame 29 on the other guide rail 21 side.

  As described above, when the seat plate 32 is landed on the lower frame 29 on the other guide rail 21 side, the seat plate 32 is also landed on the lower frame 29 also on the one guide rail 22 side. At this time, the seating detection switch 4 detects the closed state of the shutter curtain 3 as will be described in detail below. FIG. 10 is a side sectional view showing the operations of the swing member 6, the fin portion 5, and the seating detection switch 4 in a normal state. On one guide rail 22 side, the forward swing of the swing member 6 shown in FIG. 8 occurs simultaneously with the other guide rail 21 side. As a result, the swing member 6 is allowed to swing to the front side, and is shifted from directly above the block member 8 to the front side. Therefore, when the seat plate 32 descends, the swing member 6 does not contact the block member 8 and the seat plate 32 is allowed to descend. Then, as shown in FIG. 10, when the seat plate 32 lands on the lower frame 29 on the side of one guide rail 22, the fin portion 5 pushes the switch operation portion 41 downward. The seating detection switch 4 changes from the off state to the on state, and sends this detection information to the control unit 9.

  The controller 9 recognizes the on state of the seating detection switch 4 as the closed state of the shutter curtain 3 and stops the drive motor 27. Further, the control unit 9 transmits information indicating that the closing operation of the shutter curtain 3 has been normally completed to the operation remote controller 91 using wireless communication. The operation remote controller 91 displays to the user that the closing operation of the shutter curtain 3 has been normally completed.

  Next, consider a case where there is an obstacle X1 while the seat plate 32 is being lowered. FIG. 11 is a diagram illustrating a situation when the seat plate 32 is lowered when the obstacle X1 is located near the other guide rail 21. The obstacle X <b> 1 is placed on the lower frame 29 at a position close to the other guide rail 21 and is sandwiched between the seat plate 32. As a result, the other end on the right side of the seat plate 32 no longer descends from the height of FIG. The seat plate 32 is inclined as shown in FIG. This tilted state will be described in detail below when viewed from the side.

  FIG. 12 is a side sectional view showing that the swinging member 6 does not swing when there is an obstacle X1. FIG. 13 is a side sectional view showing the operations of the swinging member 6, the fin portion 5, and the seating detection switch 4 when the obstacle X1 is present. As shown in FIG. 12, when the lower portion of the seat plate 32 comes into contact with the obstacle X1 on the other guide rail 21 side and cannot be lowered, the tip 615 of the cam boss member 614 of the swing member 6 is moved to the state switching member. 7 cannot be lowered to the inclined surface 711. For this reason, the swinging member 6 cannot swing back and the restricted state is maintained. At this time, as shown in FIG. 13, on one guide rail 22 side, the swing member 6 in the restricted state contacts the block member 8 while the seat plate 32 is being lowered. Therefore, the descent of the seat plate 32 is restricted, the fin portion 5 does not push the switch operation portion 41, and the seating detection switch 4 maintains the off state.

  Here, since it is difficult to unwind the shutter curtain 3, the load of the drive motor 27 becomes heavy and the load current I increases. When the load current I sensed by the current sensing unit 93 exceeds a predetermined threshold, the control unit 9 recognizes that the shutter curtain 3 has caught the obstacle X1 and reverses the drive motor 27. Thereby, the shutter curtain 3 is reversed and wound up. Furthermore, the control unit 9 transmits information indicating that the obstacle X1 has been sandwiched to the operation remote controller 91 using wireless communication. The operation remote controller 91 displays to the user that the obstacle X1 has been sandwiched.

  Although the illustration when the obstacle X1 is close to the left one guide rail 22 is omitted, the left end of the seat plate 32 cannot be lowered with the obstacle X1 interposed therebetween. Therefore, regardless of the state of the swing member 6, the fin portion 5 does not push the switch operation portion 41, and the seating detection switch 4 maintains the off state. When the load current I exceeds a predetermined threshold value, the control unit 9 can correctly detect the state in which the shutter curtain 3 sandwiches the obstacle X1.

  Further, the illustration when the obstacle X1 is in the vicinity of the middle of the pair of guide rails 21 and 22 is also omitted, but at this time, the seat plate 32 comes into contact with the obstacle X1 at the center in the width direction. For this reason, neither end of the seat plate 32 in the width direction can land on the lower frame 29. In addition, the swinging member 6 is not swung from the restricted state, but is brought into contact with the block member 8 to be lowered. Therefore, the fin portion 5 does not push the switch operation portion 41. When the load current I exceeds a predetermined threshold value, the control unit 9 can correctly detect the state in which the shutter curtain 3 sandwiches the obstacle X1.

  As described above, in the shutter device 1 of the first embodiment, if there is an obstacle X1 when the shutter curtain 3 is closed, pinching can be reliably detected regardless of the position. Furthermore, since only one seating detection switch 4 needs to be provided on one guide rail 22, it is not necessary to provide the seating detection switch 4 on each of the guide rails 21 and 22. Further, it is not necessary to provide the seating detection switch 4 near the middle between the pair of guide rails 21 and 22 and perform troublesome wiring. Therefore, an inexpensive shutter device 1 can be provided.

  Further, as the guided portion and the guide portion, the tip end portion 615 having the roundness of the cam boss member 614 corresponding to the cam follower and the inclined surface 711 of the state switching member 7 corresponding to the cam figure are used. Is smoothly driven to the permissible state. Thereby, the reliability of the pinching detection function is improved.

  Further, the shutter case 23 has a winding body 25 and a drive motor 27, and the control unit 9 detects a load current I of the drive motor 27 in addition to the seating detection switch 4 as a function of the load detection control means. In combination, the closed state of the shutter curtain 3 is detected. When the seating detection switch 4 remains off and the load current I exceeds a predetermined threshold, the control unit 9 determines that the obstacle X1 is sandwiched and reverses the drive motor 27. Thereby, the reliability of the pinch detection function is further improved, and the operational safety of the shutter device 1 is further improved.

  Next, the shutter device 1 </ b> A according to the second embodiment will be described mainly with respect to differences from the first embodiment with reference to FIGS. 14 to 19. The shutter device 1A of the second embodiment includes a frame 2, a shutter curtain 3, a seating detection switch 4A, a fin portion 5A corresponding to a seating detection member, a slide member 6A corresponding to a push control member, a state switching member 7A, and a block member. 8A and the control part 9 etc. are comprised. In the second embodiment, the operation control system including the frame 2, the shutter curtain 3, and the control unit 9 has substantially the same configuration and function as those of the first embodiment, and a repetitive description thereof will be omitted.

  FIG. 14 is a cross-sectional view of the AA cross section of FIG. 1 viewed from the direction of the arrow in the second embodiment. FIG. 14 illustrates the closed state of the shutter curtain 3. FIG. 15 is a partially enlarged front view showing a detailed structure of the seat plate 32 </ b> A near the lower ends of the pair of guide rails 21 and 22 in the second embodiment. FIG. 15 illustrates a state where the shutter curtain 3 is slightly opened.

  The seating detection switch 4A is disposed near the lower end of one guide rail 21 standing on the right side in FIG. In addition, in connection with the arrangement position of the seating detection switch 4A being different from that in the first embodiment, the designation of “one” and “the other” of the guide rails 21 and 22 and the like is reversed left and right thereafter. The bracket 321 attached to the right side of the seat plate 32A is formed with a fin portion 5A that is bent and extended forward from the lower edge in the horizontal direction. The fin portion 5A corresponds to the seating detection member of the present invention, and is disposed immediately above the seating detection switch 4A. The fin 5A moves up and down integrally with the seat plate 32A. When the seat plate 32A lands on the lower frame 29, the fin portion 5A pushes the switch operation portion 41 (shown with hatching in FIG. 15 for convenience) of the seating detection switch 4A. Thereby, the seating detection switch 4A changes from the off state to the on state, and detects the closed state of the shutter curtain 3. The seating detection switch 4 </ b> A sends detection information of an off state or an on state to the control unit 9.

  As shown in FIGS. 14 and 15, the slide member 6 </ b> A is disposed on the back surface of the seat plate 32 </ b> A. The slide member 6 </ b> A is a rectangular belt-like member that is long in the shutter width direction, and spans between the pair of guide rails 21 and 22. In order to hold the slide member 6 </ b> A, slide grooves 325 and 326 that are vertically opposed to each other are formed on the back surface of the seat plate 32. The slide member 6A is fitted in the slide grooves 325 and 326 and can move horizontally in the shutter width direction.

  A guided member 623 is overlapped and fixed on the back surface of the slide member 6A near the other end 622 on the left side in FIG. The left end 622 of the slide member 6A and the guided member 623 substantially coincides with each other. A cam boss 624 protrudes rearward from the other end 622 of the guided member 623. The cam boss 624 moves up and down integrally with the seat plate 32A, and is guided in the width direction (left and right direction in FIG. 15) to horizontally move the slide member 6A. The cam boss 624 corresponds to the guided portion of the present invention and corresponds to the cam follower of the present invention.

  The state switching member 7A is disposed near the lower end of the other guide rail 22 standing on the left side in FIG. The state switching member 7 </ b> A includes an inclined groove 722 that extends outward in the width direction as it descends from the opening 721 at the upper end, and a vertical groove 723 that extends downward from the lower end of the inclined groove 722. The inclined groove 722 of the state switching member 7A corresponds to the guide portion of the present invention and corresponds to the cam figure of the present invention.

  In FIG. 15, the slide member 6 </ b> A is in a restriction position (corresponding to a restriction state) moved to the right side. At this time, the cam boss 624 of the slide member 6 </ b> A is positioned immediately above the opening 721 of the guide member 7. As the seat plate 32A descends, the cam boss 624 is sequentially guided from the opening 721 of the state switching member 7A to the inclined groove 722 and the vertical groove 723. As a result, the entire slide member 6A is moved to the left side to be in an allowable position (corresponding to an allowable state).

  The block member 8 </ b> A (shown with hatching in FIG. 15 for convenience) is provided on the inner side in the width direction near the lower end of one guide rail 21. The block member 8A is a box-shaped member. In FIG. 15, the block member 8 </ b> A is disposed directly below the one end 621 on the right side of the slide member 6 </ b> A at the restriction position. Therefore, the block member 8A abuts on the one end 621 of the slide member 6A that descends at the regulation position and regulates the descent of the seat plate 32A. Further, the block member 8A does not contact the one end 621 and the other end 622 of the slide member 6A moved to the left-side allowable position, and allows the slide member 6A and the seat plate 32A to descend.

  Next, the operation, action, and effect of the shutter device 1A of the second embodiment will be described. When the shutter curtain 3 is further rolled down and the seat plate 32A is lowered from the state where the shutter curtain 3 in FIG. 15 is slightly opened, first, the normal time without the obstacle X2 is considered. As the seat plate 32A descends, the cam boss 624 of the slide member 6A enters the inclined groove 722 from the opening 721 of the state switching member 7A and is guided to the left in FIG. 15 while descending. Thereby, as indicated by an arrow G in FIG. 16, the entire slide member 6A moves horizontally to the left while descending. FIG. 16 is a diagram illustrating a situation in which the state switching member 7A guides the cam boss 624 and drives the slide member 6A from the restricted position to the allowable position when there is no obstacle X2. When the cam boss 624 reaches the lower end of the inclined groove 722, the slide member 6A just moves to the left-side allowable position. At this time, the one end 621 of the slide member 6A has left from above the block member 8A.

  When the seat plate 32 </ b> A is further lowered, the cam boss 624 is guided downward by the vertical groove 723. As a result, the slide member 6A descends integrally with the seat plate 32A while maintaining the allowable position. The one end 621 of the slide member 6A descends on the left side of the block member 8A. Accordingly, as shown in FIG. 17, the seat plate 32 </ b> A is allowed to descend and land on the lower frame 29. FIG. 17 is a view showing a closed state of the shutter curtain 3 in which the seat plate 32A has landed on the lower frame 29 at the normal time without the obstacle X2. When the seat plate 32A lands on the lower frame 29, the fin portion 5A pushes the switch operation portion 41. The seating detection switch 4 </ b> A changes from the off state to the on state, and sends this detection information to the control unit 9. The controller 9 recognizes the on state of the seating detection switch 4A as the closed state of the shutter curtain 3.

  Next, let us consider a case where there is an obstacle X2 while the seat plate 32 is lowered. FIG. 18 is a diagram illustrating a situation in which the seat plate 32 </ b> A is being lowered when the obstacle X <b> 2 is close to the other guide rail 22. The obstacle X2 is placed on the lower frame 29 at a position close to the other guide rail 22, and is sandwiched between the seat plate 32A. Thereby, the other end on the left side of the seat plate 32A no longer descends from the height of FIG. Accordingly, the other end 622 of the slide member 6A and the cam boss 624 are not lowered, and the cam boss 624 is not guided to the inclined groove 722, and the restriction position of the slide member 6A is maintained. Thereafter, only one end on the right side of the seat plate 32A descends.

  When one end of the seat plate 32A descends from the situation of FIG. 18, the one end 621 of the slide member 6A also descends. However, since the slide member 6A is in the restricting position, the one end 621 abuts on the block member 8A directly below and the descending is restricted, resulting in the situation shown in FIG. FIG. 19 is a diagram illustrating a final state in which the seat plate 32 </ b> A descends when the obstacle X <b> 2 is in a position close to the other guide rail 22. As illustrated, when one end 621 of the slide member 6A contacts the block member 8A, the lowering of the one end of the seat plate 32A is restricted, and the seat plate 32A cannot land on the lower frame 29. Accordingly, the fin portion 5A does not push the switch operation portion 41, and the seating detection switch 4A maintains the off state.

  Here, since it is difficult to unwind the shutter curtain 3, the load of the drive motor 27 becomes heavy and the load current I increases. When the load current I sensed by the current sensing unit 93 exceeds a predetermined threshold value, the control unit 9 recognizes that the shutter curtain 3 has sandwiched the obstacle X2, and reverses the drive motor 27. Thereby, the shutter curtain 3 is reversed and wound up. Further, the control unit 9 transmits information indicating that the obstacle X is sandwiched to the operation remote controller 91 using wireless communication. The operation remote controller 91 displays to the user that the obstacle X2 has been sandwiched.

  Further, the illustration when the obstacle X2 is close to one of the guide rails 21 is omitted, but at this time, one end of the seat plate 32A cannot be lowered with the obstacle X2 interposed therebetween. Therefore, regardless of the position of the slide member 6A, the fin portion 5A does not push the switch operation portion 41, and the seating detection switch 4A maintains the OFF state. When the load current I exceeds a predetermined threshold value, the control unit 9 can correctly detect the state in which the shutter curtain 3 sandwiches the obstacle X.

  Further, the illustration when the obstacle X2 is located near the middle of the pair of guide rails 21 and 22 is also omitted, but at this time, the seat plate 32A contacts the obstacle X2 at the center in the width direction. For this reason, neither end in the width direction of the seat plate 32 </ b> A can land on the lower frame 29. In addition, the slide member 6A is not driven from the restricting position, and the one end 621 abuts on the block member 8A directly below and the descending is restricted. Accordingly, the fin portion 5A does not push the switch operation portion 41. Then, when the load current I exceeds a predetermined threshold, the control unit 9 can correctly detect the state in which the shutter curtain 3 sandwiches the obstacle X2.

  As described above, in the shutter device 1A of the second embodiment, if there is an obstacle X2 when the shutter curtain 3 is closed, the pinching can be reliably detected regardless of the position. Further, since only one seating detection switch 4A needs to be disposed on one guide rail 21, an inexpensive shutter device 1A can be provided. Further, since the cam boss 624 corresponding to the cam follower and the inclined groove 722 of the state switching member 7A corresponding to the cam figure are used as the guided portion and the guide portion, the slide member 6A is smoothly driven from the restricting position to the allowable position. Thereby, the reliability of the pinching detection function is improved. Furthermore, since the control unit 9 uses a method of sensing the load current I of the drive motor 27 in addition to the seating detection switch 4 as a function of the load detection control means, the operational safety of the shutter device 1A is further improved.

  Next, the shutter device 1B of the third embodiment will be described mainly with respect to differences from the first and second embodiments with reference to FIG. FIG. 20 is a partially enlarged front view showing the detailed structure of the pair of guide rails 21 and 22 near the lower end and the seat plate 32B in the third embodiment. In the third embodiment, the operation control system including the frame 2, the shutter curtain 3, and the control unit 9 has substantially the same configuration and function as those of the first and second embodiments, and a repetitive description is omitted. .

  As shown in FIG. 20, in the third embodiment, the block members 8 and 8A are omitted. And the seating detection switch 4B is provided in the position where the block member 8A was arrange | positioned in 2nd Embodiment, ie, the inner side of the width direction vicinity of the lower end of one guide rail 21. As shown in FIG. Further, the fin portion 5A of the bracket 321 on the right side of the seat plate 32B is unnecessary.

  The slide member 6B of the third embodiment is a rectangular belt-like member that is long in the shutter width direction, and is fitted into the slide groove on the back surface of the seat plate 32B (same as the slide grooves 325 and 326 of the second embodiment) and the shutter width. It can move horizontally in the direction. The slide member 6B has a positional relationship between the restriction position and the permissible position that is opposite to that of the second embodiment. A guided member 633 is stacked and fixed on the back surface of the slide member 6B near the other end 632 on the left side in FIG. The other end 632 of the slide member 6B and the guided member 633 is substantially coincident. A cam boss 634 protrudes rearward from the other end 632 of the guided member 633. The cam boss 634 moves up and down integrally with the seat plate 32B and is guided in the width direction (left and right direction in FIG. 20) to horizontally move the slide member 6B. The cam boss 634 corresponds to the guided portion of the present invention and corresponds to the cam follower of the present invention.

  The one end 635 on the right side of FIG. 20 of the slide member 6B is notched at the lower side to form a thin arm-shaped pusher 636. The pushing portion 636 moves up and down integrally with the seat plate 32B. In FIG. 20, the slide member 6B is in the restriction position (corresponding to the restriction state) moved to the left side. At this time, the pushing portion 636 of the slide member 6B is disengaged from directly above the seating detection switch 4B. The pushing portion 636 corresponds to the seating detection member of the present invention.

  The state switching member 7B is disposed near the lower end of the other guide rail 22 standing on the left side in FIG. The state switching member 7 </ b> B includes an inclined groove 735 that goes inward in the width direction as it descends from the opening 734 at the upper end, and a vertical groove 736 that extends downward from the lower end of the inclined groove 735. Here, the inclination direction of the inclined groove 735 of the third embodiment is opposite to that of the second embodiment. The inclined groove 735 of the state switching member 7B corresponds to the guide portion of the present invention and corresponds to the cam figure of the present invention.

  In FIG. 20, the cam boss 634 of the slide member 6B at the restriction position is located immediately above the opening 734 of the state switching member 7B. As the seat plate 32B is lowered, the cam boss 634 is sequentially guided from the opening 734 of the state switching member 7B to the inclined groove 735 and the vertical groove 736. Accordingly, the entire slide member 6B is configured to move to the right side to be in an allowable position (corresponding to an allowable state).

  Next, the operation and action of the shutter device 1B of the third embodiment will be described. When the shutter curtain 3 is rolled down and the seat plate 32B is lowered, first, a normal time without an obstacle is considered. As the seat plate 32B is lowered, the cam boss 634 of the slide member 6B enters the inclined groove 735 from the opening 734 of the state switching member 7B and is guided to the right in FIG. As a result, the entire slide member 6B moves horizontally to the right while descending. When the cam boss 634 reaches the lower end of the inclined groove 735, the slide member 6B just moves to the right-side allowable position. At this time, the pushing portion 636 of the one end 635 of the slide member 6B is located immediately above the seating detection switch 4A.

  When the seat plate 32B is further lowered, the cam boss 634 is guided downward by the vertical groove 736. Thereby, the slide member 6B descends integrally with the seat plate 32B while maintaining the allowable position. Therefore, when the seat plate 32B is landed on the lower frame 29, the pushing portion 636 pushes the switch operation portion 41 of the seating detection switch 4B. The seating detection switch 4B changes from the off state to the on state, and sends this detection information to the control unit 9. Thereafter, the control unit 9 performs control when the closing operation of the shutter curtain 3 is normally completed as in the first and second embodiments.

  Next, consider a case where there is an obstacle in the middle of the lowering of the seat plate 32B. When the obstacle is located near the other guide rail 22, the other end on the left side of the seat plate 32B does not descend. Therefore, the other end 632 of the slide member 6B and the cam boss 634 are not lowered, and the cam boss 634 is not guided by the inclined groove 735, and the restriction position of the slide member 6B is maintained. Thereafter, the seat plate 32B comes into contact with the obstacle X and tilts, and only one end on the right side descends.

  When one end of the seat plate 32B is lowered, the one end 635 of the slide member 6B is also lowered. However, since the slide member 6B is in the restriction position, the pushing portion 636 passes through the left side of the seating detection switch 4B and descends. Therefore, the pushing unit 636 cannot push the switch operation unit 41, and the seating detection switch 4B maintains the off state. Here, the load of the drive motor 27 becomes heavy, and the control unit 9 performs control when an obstacle is sandwiched as in the first and second embodiments.

  Further, when the obstacle is in a position close to one of the guide rails 21, the one end of the seat plate 32B cannot be lowered with the obstacle sandwiched therebetween. For this reason, the one end 635 of the slide member 6B cannot be lowered regardless of the restriction position or the allowable position. For this reason, the pushing unit 636 does not descend to the height of the switch operation unit 41, and therefore the switch operation unit 41 cannot be pushed, and the seating detection switch 4B maintains the off state. Here, the load of the drive motor 27 becomes heavy, and the control unit 9 performs control when an obstacle is sandwiched as in the first and second embodiments.

  Further, when the obstacle is located near the middle of the pair of guide rails 21 and 22, the seat plate 32B comes into contact with the obstacle at the center in the width direction. For this reason, neither end in the width direction of the seat plate 32 </ b> B can land on the lower frame 29. In addition, the slide member 6B is not driven from the restriction position, and the pushing portion 636 is not positioned directly above the seating detection switch 4B. Therefore, the pushing portion 636 does not push the switch operation portion 41, and the seating detection switch 4B maintains the off state. Here, the load of the drive motor 27 becomes heavy, and the control unit 9 performs control when an obstacle is sandwiched as in the first and second embodiments.

  Since the effect of the shutter device 1B of the third embodiment is substantially the same as that of the second embodiment, description thereof is omitted.

  In the first embodiment, a fin member is directly provided at one end 616 of the swinging member 6 near the one guide rail 22, and the fin member passes through the seating detection switch 4 in the restricted state, and the fin member in the permitted state. May be configured to push the seating detection switch 4, and in the first embodiment, in order to stabilize the position of the swinging member 6, it is swung by adding a biasing member such as a spring. The member 6 may be constantly urged to the restricted state. Similarly, in the second and third embodiments, in order to stabilize the horizontal movement of the slide members 6A and 6B, an urging member such as a spring is added to constantly urge the slide members 6A and 6B in the restricted position direction. You may make it keep. In this case, an inclined surface that leaves only one of the groove wall surfaces of the inclined grooves 722 and 723 can be used as the guide member. Various other applications and modifications are possible for the present invention.

DESCRIPTION OF SYMBOLS 1, 1A, 1B: Shutter device 2: Frame 21, 22: Guide rail 23: Shutter case 24: Storage chamber 25: Winding body 26: Electric drive device 27: Drive motor 28: Rotation transmission member 29: Lower frame 3: Shutter curtain 31, 31A, 31B: Slats 32, 32A, 32B: Seat plate 4, 4A, 4B: Seating detection switch 41: Switch operation part 5, 5A: Fin part (sitting detection member)
6: Swing member (pushing control member) 6A, 6B: Slide member (pushing control member)
614: Cam boss member 615: Tip portion (guided portion)
621: One end 622: The other end 624: Cam boss (guided portion)
632: The other end 634: Cam boss (guided portion) 635: One end 636: Pushing portion (sitting detection member)
7, 7A, 7B: State switching member 711: Inclined surface (guide portion) 712: Vertical surface 721: Opening 722: Inclined groove (guide portion) 723: Vertical groove 734: Opening 735: Inclined groove (guide portion) 736: Vertical Groove 8, 8A: Block member 9: Control unit 91: Operation remote control 92: Motor operation circuit 93: Current sensing unit I: Load current (load) X1, X2: Obstacle

Claims (7)

A pair of guide rails erected in parallel with each other, a shutter case disposed on the upper end side of the pair of guide rails and having a storage chamber formed therein, and disposed on the lower end side of the pair of guide rails A frame having a lower frame;
A shutter curtain which is accommodated in the accommodation chamber and is in an open state, and a seat plate having a lower end is lowered to the lower frame while being guided by the pair of guide rails, and is in a closed state;
A seating detection switch disposed near the lower end of one guide rail and capable of detecting the closed state of the shutter curtain;
A seating detection member disposed on the seating plate and configured to push the seating detection switch when the seating plate lands on the lower frame,
A regulation that spans between the pair of guide rails and is swingably or movably held on the seat plate, and regulates the pushing operation of the seating detection switch by the seating detection member by swinging or moving. A push control member that changes state from a state to an allowable state that allows the push operation;
A state switching member disposed near the lower end of the other guide rail, and swinging or moving the push control member when the seat plate approaches the lower frame to switch from the restricted state to the allowed state; A shutter device further comprising: The push control member is swingably held on the seat plate, and has a guided portion at the other end close to the other guide rail,
The state switching member has a guide portion that guides the guided portion and swings the push control member when the seat plate approaches the lower frame,
And a block member that is disposed near a lower end of the one guide rail, restricts the lowering of the pushing control member in the restricted state, and allows the lowering of the pushing control member in the allowed state. The shutter device according to 1. The push control member is swingably held on the seat plate, has a guided portion at the other end near the other guide rail, and has the seating detection member at one end near the one guide rail. Have
2. The shutter device according to claim 1, wherein the state switching member includes a guide portion that guides the guided portion and swings the pushing control member when the seat plate approaches the lower frame. The push control member is held on the seat plate so as to be horizontally movable, and has a guided portion at the other end close to the other guide rail,
The state switching member has a guide portion that guides the guided portion and horizontally moves the push control member when the seat plate approaches the lower frame,
And a block member that is disposed near a lower end of the one guide rail, restricts the lowering of the pushing control member in the restricted state, and allows the lowering of the pushing control member in the allowed state. The shutter device according to 1. The push control member is held by the seat plate so as to be horizontally movable, has a guided portion at the other end near the other guide rail, and has the seating detection member at one end near the one guide rail. Have
The shutter device according to claim 1, wherein the state switching member includes a guide portion that guides the guided portion and horizontally moves the push control member when the seat plate approaches the lower frame.   One of the guided portion and the guide portion is a cam figure including an inclined groove or an inclined surface, and the other of the guided portion and the guide portion is a cam follower guided by the inclined groove or the inclined surface. The shutter device according to any one of claims 2 to 5. The shutter case has a winding body that winds up the shutter curtain, and a drive motor that rotationally drives the winding body so as to be able to switch between normal rotation and reverse rotation.
The winding body rotates forward and the shutter curtain is unrolled, and the seating detection switch detects the load of the driving motor in a state where the seating plate does not detect the landing on the lower frame, The shutter device according to any one of claims 1 to 6, further comprising a load detection control unit that reverses or stops the winding body when the load exceeds a predetermined threshold value.

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