JP2012211491A - Abnormality stop device of electric shutter apparatus for building - Google Patents

Abstract

PROBLEM TO BE SOLVED: To miniaturize an abnormality stop device for at least stopping drive of an opening and closing machine by detecting a plurality of abnormalities of a shutter curtain, in an electric shutter apparatus.SOLUTION: An abnormality stop device 10 comprises a switch box 12 in which an abnormality detection switch 15 is mounted, and a detection rod 17 for switching the on-state and off-state of the abnormality detection switch 15. The detection rod 17 is made of a long body that is directed in one direction. The detection rod 17, which is disposed along an undersurface plate 4a of a shutter case 4, detects different kinds of abnormalities of the shutter curtain 2 at both ends based on an intermediate portion of the detection rod 17.

Description

  The present invention relates to a technical field of an abnormal stop device in an electric shutter device for building provided in an opening or the like of a building.

In general, in an electric shutter device in which a shutter curtain wound around a winding drum opens and closes by opening and closing the winding drum based on driving of an opening / closing machine, an upper limit and a lower limit switch are provided to provide the shutter curtain. Is configured to stop the driving of the switch when it reaches the fully open or fully closed stop position, or an obstacle detection switch is provided on the seat plate at the lower end of the shutter curtain, In the case of contact, the switch is configured to stop the emergency operation of the switch, but for abnormal situations where all of these switches do not function, the shutter curtain detects abnormalities such as closing abnormalities and opening abnormalities. Thus, there has been known one provided with an abnormal stop device configured to output an abnormality avoidance command for stopping the drive of at least the switch.
As such an abnormal stop device, a switch part is provided in the shutter case, while a first detection rod that extends upward from the switch part to detect an abnormal closing of the shutter curtain, and a lintel of the shutter case from the switch part. And a second detection rod that extends toward the part and detects an abnormal opening of the shutter curtain, and is configured to switch the switch part on and off by the detection operation by the first or second detection rod. Has been advocated.

Japanese Patent No. 3340369

  By the way, when the shutter curtain is closed abnormally, for example, when the shutter curtain is in contact with an obstacle in the middle of closing and cannot be lowered, the seat plate switch does not function and the take-up drum continues to feed out without stopping the winding drum. In this case, the shutter curtain is wound from the outer periphery of the winding drum and falls from the winding drum. Therefore, a detection rod for detecting a closing abnormality by the abnormality detection device is provided below the winding drum in order to detect the sagging. However, the above-mentioned conventional one has a configuration in which the first detection rod for detecting a closing abnormality extends upward from the switch portion, and the abnormal stopping device has a long vertical dimension. When the abnormal stop device is attached to the lower plate of the shutter case, the first detection rod is positioned below the take-up drum, while the first detection rod is normally wound around the take-up drum. Therefore, it is necessary to secure a large space between the lower surface plate of the shutter case to which the abnormality detection device is fixed and the winding drum. Therefore, there is a problem that when the shutter case is made compact, the abnormal stop device cannot be used as it is, and there is a problem to be solved by the present invention.

The present invention was created in order to solve these problems in view of the above circumstances, and the invention of claim 1 is a forward and reverse rotation of a winding drum based on driving of a switch, In an electric shutter device in which a shutter curtain wound around a winding drum opens and closes an opening, a shutter case in which the winding drum is accommodated includes a switch unit and a detection rod that switches the switch unit on and off. In the construction of an abnormal stop device configured to detect an abnormality of the shutter curtain and output an abnormality avoidance command for stopping the operation of the switch at least, the shutter as a long shape extending the detection rod of the abnormal stop device in one direction Displacement along the bottom plate of the case and different types of shutter curtains at both ends relative to the middle of the detection rod An abnormal stop device in building electric shutter device being characterized in that a configuration for detecting.
In the invention of claim 2, the detection rod extends in the indoor / outdoor direction of the shutter case, and is provided on the lower surface plate so as to be swingable in the vertical direction with an intermediate portion in the indoor / outdoor direction as a pivotal support, and one end of the detection rod Is located at the opposite side of the take-up drum and the other end faces the lintel, and the abnormal stop device detects that the shutter rod is The abnormal stop device in the electric shutter device for building according to claim 1, wherein the switch portion is switched by setting the upward movement of the other end of the pivot portion of the detection rod as an abnormal opening of the shutter curtain. is there.
In the invention of claim 3, the detection rod is disposed so that one end portion thereof extends beyond the winding drum shaft core facing portion and reaches the anti-lintel portion side of the shutter case, and the maximum winding diameter in the shutter case. The abnormal stop in the electric shutter device for building according to claim 1 or 2, wherein a switch portion is provided in a portion that does not interfere with the take-up drum, and one end portion of the detection rod switches the switch portion. Device.

According to the first and second aspects of the invention, the detection rod for detecting a plurality of abnormalities of the shutter curtain can be extended from the switch portion in one direction, and the configuration can be simplified. The shutter case can be made compact.
According to the invention of claim 3, the shutter case can be further downsized.

It is a schematic front view from the indoor side of an electric shutter device. It is the side view which notched a part of electric shutter device. It is a block diagram which shows the control state of a control part. It is a perspective view explaining an abnormal stop device. 5A, 5B, and 5C are a plan view, a side view, and a cross-sectional view taken along a line XX, respectively, with a part of FIG. 5B cut out. It is a side view explaining the effect | action of an abnormal stop apparatus.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
In the figure, reference numeral 1 denotes a heavy-duty electric shutter device that opens and closes an opening, and a shutter curtain 2 of the electric shutter device 1 is configured by connecting a plurality of slats 2a so as to be swingable in the vertical direction. Has been. The shutter curtain 2 is configured to be wound with its upper end connected to a winding drum 3, and the winding drum 3 is rotatably accommodated in a shutter case 4 described later provided above the housing opening. It is comprised so that. The winding drum 3 is linked to an opening / closing machine 5 having an electric motor provided adjacent to the shutter case 4, and the winding drum 3 is rotated by forward / reverse rotation of the winding drum 3 when the opening / closing machine 5 is driven. As the shutter curtain 2 wound around is unwound and wound, the shutter curtain 2 is opened and closed while being moved and guided by guide rails 6 erected on both sides of the housing opening to close the housing opening. Although it is configured to change between the fully closed posture and the fully open posture that opens the housing opening, these basic configurations are all conventional.

The switch 5 is provided with a control unit 7, and the switch 5 is configured to be driven and controlled based on a control command from the control unit 7 as shown in the block diagram of FIG. 3. .
An interlock controller 7a is connected to the control unit 7 and is associated with operation of an opening operation switch PBU, a stop operation switch PBS, and a closing operation switch PBD of operating tools provided on the indoor side near the housing opening. The opening operation signal, the stop operation signal, and the closing operation signal are configured to be input to the control unit 7 via the interlock controller 7a. The control unit 7 is configured to output a corresponding command signal to the opening / closing device 5 in response to the input of the opening, stopping, and closing operation signals, whereby the shutter curtain 2 is opened, stopped, and closed. ing.
Further, the control unit 7 includes an upper limit detection signal from an upper limit detection switch LSU that detects that the shutter curtain 2 is in a fully open posture, and a lower limit from a lower limit detection switch LSD that detects that the shutter curtain 2 is in a fully closed posture. The detection signal is configured to be input via the interlock controller 7a. And the control part 7 is comprised so that the shutter curtain 2 may be stopped by a fully open and fully closed attitude | position by outputting the corresponding command signal to the switch 5 with the input of each detection signal of upper and lower limits. Yes. Incidentally, the upper and lower limit detection switches LSU and LSD are provided in the switch 5 in the present embodiment, but may be detection sensors installed at appropriate places to detect the position of the shutter curtain 2.
Further, the control unit 7 is provided on the seat plate 8 at the lowermost end of the shutter curtain 2 and detects various obstacle detection signals such as an obstacle detection signal from an obstacle detection switch 9 that detects that an obstacle has come into contact with the seat plate 8. The signal is input via the interlock controller 7a. Then, the control unit 7 outputs an emergency stop command to the opening / closing device 5 in response to the input of the obstacle detection signal, thereby causing a contact with the obstacle in the process of opening / closing the shutter curtain 2 In addition, the opening and closing operation is configured to stop urgently.

Furthermore, the electric shutter device 1 according to the present embodiment is provided with an abnormal stop device 10 which will be described later, and the upper limit detection switches LSU and LSD and the obstacle detection switch 9 do not function for some reason. , The shutter curtain 2 is detected to be open or closed abnormally, and an abnormality detection signal is output to the control unit 7 via the interlock controller 7a. Then, the control unit 7 outputs an abnormality avoidance command to the opening / closing device 5 in response to the input of the abnormality detection signal, thereby performing abnormality avoiding driving such as at least stopping the opening / closing of the opening / closing device 5, An operation for avoiding abnormalities such as an emergency stop of the electric shutter device 1) is performed, so that the shutter curtain 2 is protected.
Here, in the present embodiment, the abnormal stop device 10 is provided so that one abnormal stop device 10 is located at one end portion in the left-right direction of the shutter case 4 and at one location on the right end portion in FIG. However, the number can be appropriately provided according to the width in the left-right direction of the shutter curtain 2, the installation environment, the required detection sensitivity, etc.

Next, the shutter case 4 in which the winding drum 3 is accommodated will be described. The shutter case 4 is provided so as to protrude from the upper side of the housing opening toward the indoor side, and is connected to the housing opening. The lower surface plate 4a extending from the opening H serving as an outer lintel portion to the indoor side, an L-shaped cover plate 4b covering the indoor side and the upper portion of the winding drum 3, and a left covering the left and right end portions The right side plates 4c and 4d, and the auxiliary lower side plate 4e that connects the outdoor side of the opening H and the housing are configured. Furthermore, a pair of indoor / outdoor lintel plates 4f and 4g constituting the indoor / outer edge of the opening H are bent downward at the facing portion between the lower surface plate 4a and the sub lower surface plate 4e.
Then, both ends of the winding drum 3 are rotatably supported by the left and right face plates 4c and 4d of the shutter case 4, and the winding is wound around the winding drum 3 in the fully opened posture of the shutter curtain 2 where the opening is opened. A predetermined gap exists between the maximum winding diameter R which is the outer diameter of the shutter curtain 2 and the lower surface plate 4a.

On the other hand, the seat plate 8 positioned at the lowermost end of the shutter curtain 2 has a U-shaped upper seat plate 8a and a lower seat plate 8b that are U-shaped in a side view and can be relatively displaced in the vertical direction. It is configured by fitting. The shutter curtain 2 is in a fully closed position when the lower seat plate 8b is in contact with the floor surface, while the upper seat plate 8a is positioned between the pair of indoor and outdoor lintel plates 4f and 4g of the shutter case 4. The state is configured to be a fully open posture (see solid lines in FIGS. 2 and 6).
In the present embodiment, the obstacle detection switch 9 is configured to be switched based on the relative displacement between the upper and lower seat plates 8a and 8b, and is drawn from the obstacle detection switch 9. The lead wire 9a thus formed is configured to be wound around a cord reel 9b housed in the shutter case 4 above the opening. Here, the obstacle detection switch 9 and the cord reel 9b are provided to be positioned at one end portion in the left-right direction of the lower surface plate 4a of the shutter case 4 (in the present embodiment, the right side portion in FIG. 1). . The cord reel 9b forms a space above the maximum winding diameter R of the winding drum 3 on the indoor side of the lower surface plate 4a of the shutter case 4, that is, on the indoor side of the position opposite to the shaft core portion of the winding drum 3. It is provided in the location to be done. Further, the cord reel 9b is urged in a direction in which the lead wire 9a is wound up by an urging ammunition (not shown), while the lintel plate 4f on the indoor side which is the outdoor side of the cord reel 9b is not obstructed. A guide roller 9c for guiding the lead wire 9a drawn from the object detection switch 9 to the cord reel 9b is provided. As a result, the lead wire 9a is pulled out from the cord reel 8b following the downward movement of the shutter curtain 2 in the closing operation of the shutter curtain 2, and is pulled into the cord reel 8b in the opening operation based on the biasing force of the biasing ammunition. It is configured to be wound (rolled).
Incidentally, the obstacle detection switch provided on the seat plate is not limited to the wired type as described above, and can be configured wirelessly. In this case, the control unit is provided with a receiving unit, It can be set as the structure which receives the detection signal transmitted from an obstruction detection switch by a receiving part.

As shown in FIG. 1, the abnormal stop device 10 is at the right end of the lower surface plate 4a and adjacent to the right side of the cord reel 9b and the guide roller 9c (in FIG. 4, adjacent to the left side of the cord reel 9b). Is provided.
As shown in FIG. 5, the abnormal stop device 10 includes a base gantry 11 that is disposed facing in an indoor / outdoor direction. The base gantry 11 has a long bottom in the indoor / outdoor direction. A base piece 11a fixed to the face plate 4a is formed. The base piece 11a is an indoor side end portion, located indoors with respect to the axial center position of the winding drum 3, and located at a portion where a space is formed above the maximum winding diameter R of the winding drum 3. A pair of fixing pieces 11b that protrude outward in the left-right direction are formed. And the base piece 11a is a shutter case lower surface plate through the indoor and outdoor direction long hole-like through-hole 11c opened in the outdoor part and the indoor / outdoor direction long-hole-like through hole 11d opened in the fixed piece 11b. By being screwed to 4a, it is integrally fixed in a state in which the position adjustment in the indoor / outdoor direction is made with respect to the lower surface plate 4a. Further, the base piece 11a is adjacent to the inside and outside of one of the pair of left and right fixed pieces 11b (on the right side in the drawing of FIG. 5C) and the pair of mounting pieces 11e are respectively upward. The switch box 12 is screwed and fixed to these mounting pieces 11e. As a result, the switch box 12 has a maximum winding diameter R of the winding drum 3 on the lower surface plate 4a of the shutter case 4 on the indoor side of the portion opposite to the shaft core portion of the winding drum 3 on the anti-lintel side. It is configured to be provided at a position where a space is formed above, that is, a position where the space does not interfere with the winding drum 3 having the maximum winding diameter R.
Further, the outdoor side end of the base piece 11a extends from the lower part of the winding drum 3 to the vicinity of the indoor lintel plate 4f, and the outdoor side end of the base piece 11a includes A pair of pivot pieces 11f that are erected upward from both edges in the left-right direction are bent.

  The switch box 12 includes a first box body 13 that is screwed to the mounting piece 11e, and a second box body 14 that is externally fitted integrally with the first box body 13. 13 includes a right side piece 13a, upper and lower side pieces 13b and 13c, and indoor and outer side pieces 13d and 13e fixed to the mounting piece 11e of the base mount 11. On the other hand, the second box body 14 includes a left side piece 14a and upper and lower side pieces 14b, 14c, and is inserted into the first box body 13 so as to be fitted from the left side. As a result, the switch box 12 is configured.

The switch box 12 is located in the right half of FIG. 5C and accommodates an abnormality detection switch (microswitch) 15 corresponding to the switch portion of the present invention. A predetermined gap exists between the lower piece 13 c of the one box body 13 and is screwed and fixed in a state along the right piece 13 a of the first box body 13. The switch contact 15a of the abnormality detection switch 15 is configured to be switched on and off by projecting downward from the lower end surface of the abnormality detection switch 15.
On the other hand, an operating arm 16 is accommodated in the left half of the switch box 12 in a state adjacent to the abnormality detection switch 15. The operating arm 16 includes a first arm piece 16a extending in the vertical direction and an indoor / outdoor. The second arm piece 16b extending in the direction is formed in an L shape. A pair of pivot pieces 16c are bent toward the indoor side at the left and right edges of the first arm piece 16a, and pivot pins 16d penetrate the pivot pieces 16c so as to be relatively rotatable. By supporting both ends of the pivot pin 16d on the side of the switch box 12 (the right and left pieces 13a and 14a of the first and second boxes 13 and 14), the operating arm 16 is moved to the first arm piece. 16a is configured to be swingable in the indoor and outdoor directions, and the second arm piece 16b is swingable in the vertical direction. Further, the second arm piece 16b is integrally formed with a switching piece 16e that protrudes in the right direction (in the direction of the abnormality detection switch 15) and abuts against the switch contact 15a from below. 16d is provided with a coil spring 16f that urges the switching piece 16e of the second arm piece 16b to oscillate in a direction (upward) in which the switch contact 15a is pressed from below and sunk. Accordingly, the operating arm 16 is configured to be held in a non-operating posture in which the switch contact 15a of the abnormality detection switch 15 is pressed from below by the switching piece 16e of the second arm piece 16b in a natural state. Yes. On the other hand, when a load is applied to the operating arm 16 to forcibly move the second arm 16b against the urging force of the coil ammunition 16f, the switching piece 16e allows the switch contact 15a to protrude. Thus, the abnormality detection switch 15 is configured to output an abnormality detection signal to the control unit 7 when the operating arm 16 is changed to the action posture. .

And the detection rod 17 of this invention is connected with the front-end | tip part (outdoor side edge part) of the 2nd arm 16b of the said action | operation arm 16, and this detection rod 17 of the abnormality detection switch 15 via the action | operation arm 16 is connected. The switch contact 15a is configured to be switched.
The detection rod 17 is composed of first and second rods 18 and 19 which are formed in a round bar shape and extend in one direction which is an indoor / outdoor direction, and are supported along the base piece 11 a of the base mount 11. It is configured as follows. The first rod 18 constituting the detection rod 17 is a member constituting one end portion (indoor side portion) of the detection rod 17 of the present invention, the indoor side end portion 18a is connected to the second arm 16b, The outdoor side end portion 18b is formed so as to extend beyond the shaft core portion of the winding drum 3 and reach the pivotal support piece 11f forming portion of the outdoor side base mount 11. The second rod 19 is a member constituting the other end portion (outdoor side end portion) of the detection rod 17 of the present invention, and the indoor side end portion 19 a is connected to the outdoor side end portion 18 b of the first rod 18. It is integrally connected, and the outdoor side end 19b is formed to reach the opening H (between a pair of indoor and outdoor lintel plates 4f, 4g) formed in the shutter case 4. The detection rod 17 is made of a single rod member, and the portion corresponding to the outdoor end 18b of the first rod 18 and the portion corresponding to the indoor end 19a of the second rod 19 are connected to the indoor end of the base mount 11. The first and second rods 18 and 19 are extended in one direction (indoor / outdoor direction) by being integrated so as to be wound around a rotating shaft 11g rotatably supported on a pair of pivot pieces 11f formed in It is comprised so that it may come out. At this time, the detection rod 17 (first and second rods 18 and 19) is formed with a predetermined gap between the base piece 11a, and the rotating shaft 11g to which the rods 18 and 19 are coupled (in the present invention). The first and second rods 18 and 19 (both ends) swing in the vertical direction opposite to each other, for example, the first rod 18 moves downward while the second rod 19 moves upward. The oscillating displacement that moves is freely configured.

The indoor side end portion 18a of the first rod 18 is bent in the left-right direction so that a U-shaped folded portion folded back to the indoor side is bent, and the folded tip portion 18c of the folded portion is Inserted into the switch box 12 and loosely fitted into a locking hole 16g formed by cutting and raising at the indoor side end of the second arm 16b and penetrating in the left-right direction, thereby operating with the first rod 18 of the detection rod 17. The arm 16 is configured to be interlocked and coupled in such a manner that it can swing in the vertical direction. And the intermediate part from the site | part exposed outside from the switch box 12 of the 1st rod 18 to the support part with the pivot piece 11f of the base stand 11 becomes the 1st detection part 18d, and this 1st detection part 18d is winding. It is configured to be positioned below the shutter curtain 2 wound around the take-up drum 3.
Here, the outdoor side piece 13e of the first box 13 constituting the switch box 12 has a concave notch concave portion 13f facing upward so that the indoor side end portion 18a of the first rod 18 penetrates freely in the vertical direction. The indoor side end 18a of the first rod 18 is configured to be engaged with the groove bottom on the upper side of the recess 13f in the non-acting posture of the operating arm 16. As a result, the biasing force of the coiling machine 16f that biases the operating arm 16 toward the non-acting posture is received by the locking of the indoor side end portion 18a of the first rod 18 to the recess 13f groove bottom. The switching piece 16e of the two arms 16b is configured not to press the switch contact 15a of the abnormality detection switch 15 more than necessary, so that the switch contact 15a can be protected.

Further, the second rod 19 is formed so that the outdoor side end portion 19b reaches the portion facing the opening H (the lintel portion) of the shutter case 4 beyond the upper portion of the lintel plate 4f on the indoor side of the shutter case 4. Has been. The outdoor-side end portion 19b is formed with a U-shaped folded portion folded inward by folding in the left-right direction, and the folded-back portion has a predetermined width in the left-right direction. The detection part 19c is comprised, This 2nd detection part 19c is comprised so that it may be located above the seat board 8 located in the opening H of the shutter case 4 in the shutter curtain 2 in a fully open attitude | position.
Thus, the detection rod 17 constituted by the first and second rods 18 and 19 is formed of a single long rod material and extends from the switch box 12 in one direction in the indoor / outdoor direction. This simplifies the configuration, and is arranged along the lower surface plate 4a below the winding drum 3, so that the shutter case 4 can be made compact. As shown in B), the first detection portion 18d of the first rod 18 moves downward with respect to the rotation shaft 11g, or the second detection portion 19c of the second rod 19 moves upward with reference to the rotation shaft 11g. Based on this, the folded tip 18c of the first rod 18 that is a connecting portion with the operating arm 16 is configured to move downward. In the state where the folded tip 18c of the first rod 18 is moved downward, the second arm 16b of the operating arm 16 is forcibly lowered against the urging force of the coiling machine 16f to obtain an action posture. Accordingly, the switch contact 15a of the abnormality detection switch 15 is projected to output an abnormality detection signal.

Next, an operation for detecting an abnormal closing / opening of the shutter curtain 2 by the abnormal stop device 10 will be described.
First, regarding the shutter curtain 2 closing abnormality, the control unit 7 of the electric shutter device 1 issues a closing drive command to the switch 5 as the closing operation switch PBD is operated and a closing operation signal is input. When the shutter curtain 2 comes into contact with an obstacle during the closing operation, the obstacle detection switch 9 provided on the seat plate 2 outputs an obstacle detection signal. Thus, the driving of the opening / closing machine 5 is stopped, and the closing operation of the shutter curtain 2 is stopped, and an abnormal situation does not occur. On the other hand, when the obstacle detection switch 9 does not function for some reason, the shutter curtain 2 is obstructed so that the downward movement is restricted, while the switch 5 is driven to wind the shutter curtain 2 out. The take-up drum 3 rotates. At this time, the shutter curtain 2 wound in the state of being wound around the winding drum 3 is loosened from the outer diameter side, causing the roll to collapse, and is positioned on the outer diameter side as indicated by a virtual line in FIG. The lower part of the shutter curtain 2 hangs down from the winding drum 3. At this time, the shutter curtain 2 that collapses and hangs down is the first rod 18 that is one end (indoor side end) of the detection rod 17 (abnormal stop device 10) with respect to the rotating shaft 11g (pivot support). When the first detection unit 18d is moved downward by coming into contact with the first detection unit 18d, the folded tip 18c of the first rod 18 forcibly moves down the tip of the second arm 16b of the operating arm 16, thereby causing an abnormality. The switch contact 15a of the detection switch 15 protrudes to output an abnormality detection signal, and based on the output, the control unit 7 outputs an abnormality avoidance command to the switch 5 so that the shutter curtain 2 is urgently stopped in the present embodiment. It is configured.

On the other hand, although the shutter curtain 2 is abnormally opened, the control unit 7 of the electric shutter device 1 issues an opening drive command to the switch 5 as the opening operation switch PBU is operated and an opening operation signal is input. The shutter curtain 2 is opened by output, but the seat plate 8 located at the lowermost end of the shutter curtain 2 is fully opened between the indoor and outdoor lintel plates 4f and 4g constituting the opening H of the shutter case 2. In the case of the posture, the upper limit detection switch LSU provided in the opening / closing machine 5 outputs an upper limit detection signal, thereby stopping the driving of the opening / closing machine 5 and stopping the opening operation of the shutter curtain 2, resulting in an abnormal situation. There is nothing. On the other hand, when the upper limit detection switch LSU does not function for some reason, the shutter curtain 2 enters a state in which the shutter curtain 2 enters the shutter case 2 beyond the fully open posture, as indicated by a virtual line in FIG. At this time, the upper seat plate 8a of the seat plate 8 of the shutter curtain 2 beyond the fully open posture is the other end portion (outdoor side end) with reference to the rotation shaft 11g (pivot portion) of the detection rod 17 (abnormal stop device 10). When the second detection portion 19c of the second rod 19 is moved upward, the folded tip end portion 18c of the first rod 18 is moved downward to forcibly move the tip end portion of the second arm 16b of the operating arm 16 downward. As a result, the switch contact 15a of the abnormality detection switch 15 protrudes to output an abnormality detection signal, and based on the output, the control unit 7 outputs an abnormality avoidance command to the switch 5, and in the present embodiment, the shutter curtain 2 Is configured to make an emergency stop.
The abnormality avoidance command by the control unit is not limited to the configuration in which the switch is urgently stopped. When a shutter curtain closing abnormality is detected, the switch is wound for a predetermined time. When the shutter curtain is detected to be open, the switch may be driven in the unwinding direction (closing direction) for a predetermined time.

  Here, in the detection rod 17, a step 18e is formed between the indoor side end 18a of the first rod 18 and the first detection unit 18d, and the indoor side end 19a of the second rod 19 and the second detection are detected. A step portion 19d is formed between the portion 19c. As a result, the winding ends of the detection rod 17 are maximized with respect to the portion where the folded tip portion 18c, which is a portion where the abnormality detection switch 15 is switched, and the second detection portion 19c, which detects the opening abnormality, are located. An intermediate portion of the detection rod 17, which is a portion that is close to and opposed to the winding drum 3 having the diameter R, is formed so as to be separated from the winding drum 3. Accordingly, the facing distance between the base piece 11a (the lower surface plate 4a of the shutter case 4) and the winding drum 3 can be made closer, and the shutter case 4 can be made compact. Note that it is not always necessary to provide a stepped portion on the detection rod, and the detection rod can be formed linearly depending on the shape of the shutter case.

  In the present embodiment configured as described, the electric shutter device 1 is configured such that the shutter curtain 2 wound around the winding drum 3 opens and closes the opening by the forward and reverse rotation of the winding drum 3 based on the driving of the opening / closing machine 5. In this case, in the shutter case 4 in which the winding drum 3 is accommodated, an abnormal stop device 10 that detects an abnormality of the shutter curtain 2 and outputs an abnormality avoidance command to stop driving the switch 5 at least. Is provided. In this case, the abnormal stop device 10 includes a switch box 12 provided with an abnormality detection switch 15 and a detection rod 17 that switches the abnormality detection switch 15 ON and OFF. The detection rod 17 is in one direction. The extended elongated shape is arranged along the lower surface plate 4a of the shutter case 4 and the shutter curtain 2 is different at both ends with reference to the rotating shaft 11g serving as an intermediate portion of the detection rod 17. It is configured to detect types of abnormalities. As a result, the detection rod does not extend in two directions unlike the conventional switch unit that extends the detection rod in two directions, the lintel direction and the upper direction, thereby simplifying the configuration. In addition, since the detection rod 17 does not extend upward from the switch box 12 and is disposed along the lower surface plate 4a, the shutter case 4 can be made compact.

  As described above, the detection rod 17 in which the present invention is implemented is formed of a long body facing one direction. In this case, the detection rod 17 composed of the first and second rods 18 and 19 is a shutter. The lower surface plate of the shutter case 4 is extended in one direction which is the indoor / outdoor direction of the case 2 and the rotating shaft 11g serving as a connecting portion of the first and second rods 18 and 19 which are intermediate portions of the detection rod 17 is pivotally supported. 4a is provided so as to be swingable in the vertical direction. Then, the second detection unit 19c of the second rod 19 serving as one end moves upward with respect to the rotation shaft 11g, so that the opening abnormality is detected, and the first detection unit 18d of the first rod 18 serving as the other end is the rotation shaft. 11g is used as a reference to detect a closing abnormality, and in any detection operation, the first rod 18 can switch the switch contact 15a of the abnormality detecting switch 15 via the operating arm 16, and the shutter An abnormal avoidance operation such as an emergency stop of the curtain 2 can be executed. As a result, the abnormal stop device 10 can detect both the abnormalities of closing and opening of the shutter curtain 2 with a single detection rod 17 and can simplify the configuration. Is arranged along the lower surface plate 4a of the shutter case 4, so that the shutter case 4 can be made compact.

  Furthermore, in the case where the present invention is implemented, the second rod 19 faces the lintel portion and the first rod 18 is the axis of the winding drum 3 along the lower surface plate 4a of the shutter case 4. It extends to the part of the indoor side that is the anti-lintel part side of the shutter case 4 beyond the part-opposing part and where the space is formed above the maximum winding diameter R of the winding drum 3, A switch box 12 is provided at a portion that does not interfere with the winding drum 3 having the maximum winding diameter R. As a result, only the detection rod 17 of the abnormal stop device 10 extends in the indoor / outdoor direction below the portion of the outer periphery of the winding drum 3 having the maximum winding diameter R closest to the lower surface plate 4a of the shutter case 4. The distance between the lower surface plate 4a and the winding drum 3 can be reduced, the shutter case 4 can be made compact, and the switch box 12 having a long vertical dimension is formed in the shutter case 4. The shutter case 4 can be further downsized.

Of course, the present invention is not limited to the above-described embodiment, and it is possible to provide a plurality of abnormal stop devices as described above. It is possible to respond with high sensitivity to the collapse phenomenon that changes in accordance with the contact position.
In addition, each abnormal stop device can adjust detection sensitivity according to the total length of the detection rod, the position of the pivot portion, and the positional relationship with the switch portion, and can be appropriately set according to the use environment. And in the said embodiment, it is the setting state which can switch a switch part by slight displacement of a detection rod in order to set high detection sensitivity.

  INDUSTRIAL APPLICABILITY The present invention can be used to downsize an abnormal stop device that responds to an abnormal situation in which various detection switches do not function in an electric shutter device provided in an opening of a building.

DESCRIPTION OF SYMBOLS 1 Electric shutter device 2 Shutter curtain 3 Winding drum 4 Shutter case 4f Indoor lintel plate 5 Opening and closing machine 7 Control part 8 Seat plate 9 Obstacle detection switch 10 Abnormal stop device 11 Base mount 12 Switch box 13 First box Body 15 Abnormality detection switch 16 Actuating arm 17 Detection rod 18 First rod 18d First detection unit 19 Second rod 19c Second detection unit

Claims (3)

  In an electric shutter device in which a shutter curtain wound around a winding drum opens and closes by opening and closing the winding drum based on the driving of an opening / closing machine, a switch unit is provided in a shutter case in which the winding drum is accommodated. And an abnormality stop device that outputs an abnormality avoidance command for detecting an abnormality of the shutter curtain and at least stopping the driving of the switch by detecting an abnormality of the shutter curtain. The detection rod is arranged in a long shape extending in one direction along the lower surface plate of the shutter case, and detects different types of abnormalities in the shutter curtain at both ends with reference to the middle portion of the detection rod; An abnormal stop device for an electric shutter device for building, characterized in that   The detection rod extends in the indoor / outdoor direction of the shutter case, and is provided on the lower surface plate so as to be swingable in the vertical direction with the intermediate portion in the indoor / outdoor direction as a pivotal support. And the other end of the detection rod is disposed so as to face the lintel. The abnormal stop device for an electric shutter device for building according to claim 1, wherein the switch portion is switched with the upward movement of the other end of the shutter as an abnormal opening of the shutter curtain.   The detection rod is disposed so that one end thereof extends beyond the portion opposite the winding drum shaft core to the anti-lintel portion side of the shutter case, and does not interfere with the winding drum having the maximum winding diameter in the shutter case. The abnormal stop device for an electric shutter device for building according to claim 1 or 2, wherein a switch portion is provided at a site, and one end portion of the detection rod switches the switch portion.

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