JPH09310573A - Emergency stop device for electric shutter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an emergency stop device for an electric shutter having a structure, in which a malfunctions is difficult to be generated, by installing a protector. SOLUTION: In this emergency stop device, to lowering of a shutter body 5 is stopped when a foreign substance is held between the shutter body 5 and a lower frame receiving the shutter body 5. The emergency stop device has a switch operating mechanism 17 disposed while being crossed between the side end sections of the two arbitrary slats 21, 22 of the shutter body 5 and projected in the horizontal direction when the salts 21, 22 are brought to a shrunk and connected state mutually, a switch 15 being mounted on a guide rail 7 in response to the switch operating mechanism 17, being operated by the projection of the switch operating mechanism 17 and stopping motor, and a projector 34 set up to the shutter body 5 and abutted against the guide rail 7 prior to the switch operating mechanism 17 under a non-projected state to a shake in the horizontal direction of the shutter body at that time.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an emergency stop device for an electric shutter such as a window shutter.

[0002]

2. Description of the Related Art Conventionally, as an emergency stop device for an electric shutter of this type, for example, a device disclosed in Japanese Utility Model Publication No. 7-34153 is known. In this electric shutter, a flexion / extension link is provided so as to straddle the bottom slat at the bottom end of the shutter body and the slat above the bottom slat, and a strip-shaped detection switch is provided inside the guide rail corresponding to the flexion / expansion link. Has been. The bottom slat and the slat are telescopically connected, and when the shutter body is suspended, the bottom slat and the slat are in an extended connection state, and the lower end of the shutter body is in contact with the lower frame. Then, the bottom slats and the slats are in a contracted and connected state.

On the other hand, the flexion / extension link extends when the bottom slats and the slats are in the extended connection state and bends when the bottom slats are in the contracted connection state, and this bending causes the detection switch to be turned on by projecting in the front-back direction. When the detection switch is turned on, the lift motor of the shutter body is stopped via the controller. That is, when a foreign substance or the like is caught between the lower shutter body and the lower frame, the lowering of the shutter body is stopped.

[0004]

In such a conventional electric shutter emergency stop device, since the projecting end of the bending / expanding link in the extended state slightly projects from the found surface of the shutter body, the shutter body may be damaged by strong wind or the like. If it shakes back and forth, the protruding end of the stretched bending and stretching link may hit the detection switch, and the detection switch may malfunction.

Further, since the strip-shaped and soft detection switch is directly attached to the inner surface of the guide rail, there is a problem that the detection switch is extremely difficult to be attached and is difficult to be attached accurately. In this case, not only the workability of the mounting work is bad, but also if the detection switch is mounted in the state where the unevenness is generated, it may cause a malfunction.

An object of the present invention is to provide an emergency stop device for an electric shutter having a structure in which malfunction does not easily occur, and an emergency stop device for an electric shutter to which a detection switch can be attached easily and accurately.

[0007]

According to another aspect of the present invention, there is provided an electric shutter emergency stop device in which foreign matter is sandwiched between a shutter body which is guided by guide rails on the left and right sides and is lowered by a motor, and a lower frame which receives the shutter body. In the case of an electric shutter emergency stop device that stops the shutter body from descending, the shutter body is disposed so as to straddle the side ends of any two slats of the shutter body that are elastically connected, and the slats are contracted. The switch operation mechanism that protrudes to the left and right when in the connected state, the switch that is provided on the guide rail corresponding to the switch operation mechanism and that operates by the protrusion of the switch operation mechanism to stop the motor, and the shutter body side. It is provided at the end, and against the horizontal shake of the shutter body,
And a protector that comes into contact with the guide rail in preference to the switch operating mechanism in the non-protruding state.

According to this structure, when a foreign object is sandwiched between the shutter body and the lower frame, the slats are in a contracted and connected state, so that the switch operating mechanism protrudes in the left and right directions to operate the switch and stop the motor. Let That is, the lowering of the shutter body is stopped. In this case, a protector that comes into contact with the guide rail prior to the switch operation mechanism in the non-protruding state is provided against the shake of the shutter body in the left-right direction. Even if the slats are laterally displaced from each other, the protector hits the guide rail in preference to the switch operating mechanism in the non-protruding state, so that the distance between the switch operating mechanism in the non-protruding state and the switch is appropriate. The switch is not held by the switch operating mechanism in the non-protruding state to operate the switch and stop the motor.

According to another aspect of the present invention, in the emergency stop device for an electric shutter, when a foreign object is caught between a shutter body which is guided by guide rails on the left and right and descends by a motor, and a lower frame which receives the shutter body. In the emergency stop device of the electric shutter that stops the descent of the slat, when the slat is in a contracted and connected state, the slat is contracted and connected by straddling the side ends of any two slats of the shutter body that are elastically connected. A switch operating mechanism that protrudes in the left-right direction, and a switch that is provided on the guide rail corresponding to the switch operating mechanism and that operates by the protrusion of the switch operating mechanism to stop the motor. Attached to the slat and configured to be bendable in the front-rear direction, and a bender attached to the other slat and bent by the pusher. And a link, the pusher is advanced when the slats with each other becomes contracted coupled state, bending and stretching the link is characterized by projecting in the lateral direction is bent by the advance of the pusher.

According to this structure, when a foreign object is sandwiched between the shutter body and the lower frame, the slats are contracted and connected, so that the pusher of the switch operating mechanism advances to bend the bending / extending link. To the left and right. As a result, the switch is operated to stop the motor and stop the descent of the shutter body. In this case, since the pusher is attached to one slat and the bending link is attached to the other slat, when the shutter body is wound around the drum, bending force in the front-back direction is applied to the bending link that bends in the left-right direction. It does not work and the bending and stretching links do not bend and become unstretchable due to repeated winding. Further, since the pusher is configured to be bendable in the front-rear direction, when the shutter body is wound around the drum, the switch operation mechanism does not bend at this portion and the pusher is not damaged.

According to another aspect of the present invention, there is provided an electric shutter emergency stop device in which, when foreign matter is caught between a shutter body which is guided by guide rails on the left and right and descends by a motor, and a lower frame which receives the shutter body. In the emergency stop device of the electric shutter that stops the descent of the slat, when the slat is in a contracted and connected state, the slat is contracted and connected by straddling the side ends of any two slats of the shutter body that are elastically connected. A switch operating mechanism that protrudes in the longitudinal direction of the guide rail, and a switch that is provided along the longitudinal direction of the guide rail corresponding to the switch operating mechanism and that operates by the protrusion of the switch operating mechanism to stop the motor. , And a holder attached to the guide rail while holding the switch body.

According to this structure, when a foreign object is sandwiched between the shutter body and the lower frame, the slats are contracted and connected to each other, so that the switch operating mechanism protrudes to operate the switch and stop the motor. That is, the lowering of the shutter body is stopped. In this case, since the switch has the switch main body and the holder that holds the switch main body and is attached to the guide rail, the holder can be installed in the narrow space of the guide rail with the switch main body attached. That is, the relatively soft switch body can be attached to the guide rail in a state where it is incorporated in a relatively hard holder. Therefore, the switch main body can be easily attached to the guide rail without causing unevenness. If the guide rail is formed with a receiving portion for receiving the holder, the mounting of the switch can be further simplified.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION An electric shutter for a window equipped with an emergency stop device according to an embodiment of the present invention will be described below with reference to the accompanying drawings. As shown in the vertical sectional view of FIG. 1 and the horizontal sectional view of FIG.
It is provided as a shutter of a window (only the window frame A is shown in the figure) attached to the opening Wa (outer wall W) of the building, and surrounds the window body A and the shutter body 2 arranged above the window frame A. The shutter frame 3 is arranged as described above. A shutter body 5 is housed in the shutter body 2 so as to be wound around a winding drum 4 described later.
Is guided by a pair of left and right guide rails 7, 7 incorporated in both vertical frames 6, 6 of the shutter frame 3, and is unwound and wound.

The shutter body 2 has a roof plate 8 for covering the upper portion thereof.
An outer shell is composed of an inspection plate 9 that covers the front part, a bottom plate 10 that covers the lower part, and a pair of side caps 11 that covers the left and right sides. The drum 4 and the motor 12 that rotates the winding drum 4 in the forward and reverse directions.
And are arranged. The motor 12 is connected to the controller 13, and the operation switch 14 provided in the room is connected to the controller 13. When the down button 14a of the operation switch 14 is pressed, the take-up drum 4 is driven via the motor 12.
Is rotated and the shutter body 5 is unwound, and when the up button 14b is pressed, the winding drum 4 is reversely rotated through the motor 12 and the shutter body 5 is wound.

On the other hand, an emergency stop switch 15 incorporated in the guide rail 7 is connected to the controller 13, and when foreign matter is caught between the descending shutter body 5 and the lower frame 16 of the shutter frame 3, The emergency stop switch 15 operates to stop the motor 12 via the controller 13 (details will be described later). And
A switch operating mechanism 17 for operating the emergency stop switch 15 is incorporated in the shutter body 5. Reference numeral 18 in the drawing denotes a wrap-up prevention stopper 18 that prevents the shutter body 5 from swinging in the left-right direction and prevents the shutter body 5 from being excessively entangled.

The shutter body 5 is constructed by connecting the bottom slat 21 at the lowermost end and a large number of slats 22 to each other in the vertical direction. FIG. 3 shows this connection form by taking the bottom slat 21 and the upper slat 22 as an example. The slat 22 is formed in a curved cross-sectional shape so that it can be wound up well on the winding drum 4,
Since the bottom slat 21 stops before being wound up, it has a linear cross-sectional shape. At the upper end of the bottom slat 21, a hook portion 23 having a hook-shaped cross section is formed, and correspondingly, a swallowing groove 24 into which the hook portion 23 is inserted is formed at a lower portion of the slat 22. The swallowing groove 24 is composed of a front hook receiving piece 25 that engages with the hook portion 23, a rear hanging piece 26 that faces the hook receiving piece 25, and an upper partition plate 27.

As shown in FIG. 3A, the shutter body 5
Is seated on the lower frame 16 and the shutter body 5 is completely closed, the hook portion 23 is deeply inserted into the swallow groove 24, and the slat 22 abuts on the bottom slat 21 so that the slat 22 and the bottom slat 21 And become contracted and connected. Even when the above-mentioned foreign matter is caught, the slats 22 and the bottom slats 21 are in a contracted and connected state. On the other hand, as shown in FIG. 3B, when the shutter main body 5 is separated from the lower frame 16 and is suspended, the hook portion 23 moves and engages with the hook receiving piece 25, and the slat 22 bottoms. The rat 21 is suspended, and the slats 22 and the bottom slats 21 are extended and connected. Reference numeral 28 in the figure is a cushion rubber that absorbs an impact when the shutter body 5 is seated on the lower frame 16.

As shown in FIG. 4, the switch operating mechanism 17 is composed of an upper link member 31 attached to the slat 22 and a lower link member 32 attached to the bottom slat 21. The upper link member 31 is attached to the slat 22 and is a mounting portion 3 that also functions as a small cap of the slat 22.
3, a protector 34 extending in the left-right direction from the attachment portion 33, and an upper link 35 rotatably attached to the lower portion of the protector 34. The lower link member 32 is attached to the bottom slat 21, and the attachment portion 36 also serves as a small cap of the bottom slat 21, and the attachment portion 3
6 and a lower link 37 that is rotatably attached to the upper part of 6. The tip of the upper link 35 and the tip of the lower link 37 are rotatably connected via a connecting pin 38, and a roller 39 that abuts against the emergency stop switch 15 is rotatably supported by the connecting pin 38. Then, the upper link 35 and the lower link 37 bend and extend in the left-right direction around the connecting pin 38 to project, and the emergency stop switch 15 is turned on via the roller 39.

That is, as shown in FIGS. 4B and 5, when the slats 22 and the bottom slats 21 are in an extended connection state (see FIG. 3B), the upper link 35 and the lower link are connected. When 37 and the slats 22 and the bottom slat 21 are in a contracted and connected state (see FIG. 3A), the upper link 35 and the lower link 37 are bent. Will be in a protruding state.
In this protruding state, the roller 39 comes into contact with the emergency stop switch 15 attached to the inner wall 7a of the guide rail 7 and turns it on. Therefore, when a foreign object is sandwiched between the shutter body 5 and the lower frame 16, the upper link 35
The lower link 37 is bent and the emergency stop switch 15 is turned on to stop the lowering of the shutter body 5.

On the other hand, the protector 34 is projected so as to be bent at an intermediate portion, and its tip is arranged so as to face the projecting piece 7b of the guide rail 7 holding the emergency stop switch 15 ( See FIG. 4A). In this case, the projecting length of the protector 34 is an intermediate length between the projecting length of the roller 39 in the non-projecting state of the upper link 35 and the lower link 37 and the projecting length of the roller 39 in the projecting state. As a result, even if the roller 39 in the non-protruding state tends to turn on the emergency stop switch 15 due to swaying to the left or right or displacement of each slat 22, the protector 34 preferentially abuts the projecting piece 7b of the guide rail 7. The roller 39 in the non-protruding state is prevented from turning on the emergency stop switch 15. Therefore, it is possible to prevent malfunction of the emergency stop switch 15 and also prevent damage to the emergency stop switch 15.

The emergency stop switch 15 is provided on the guide rail 7
This is a strip-shaped switch extending in the up-down direction on the inner wall 7a, and includes a switch body 41 and a holder 42 that holds the switch body 41. The switch body 41 is
A flexible member such as rubber is provided with a pair of electrodes facing each other inside. When the upper link 35 and the lower link 37 are bent and the roller 39 comes into contact with the switch main body 41, the switch main body 41 is recessed so that the electrodes are electrically connected to each other and turned on.

On the other hand, the holder 42 is provided with a mounting groove 43 having a C-shaped cross section for mounting the switch body 41 in the middle portion thereof.
1 holds the roller 39 so as to face the above roller 39 accurately in the vertical direction. Further, in this state, the holder 42 is a space on the front side of the inner wall 7a of the guide rail 7, which is partitioned by the projecting piece 7b of the guide rail 7 and the small projecting piece 7c of the guide rail 7 facing the projecting piece 7b. Is attached to. That is, the switch main body 41 is attached to the holder 42 so as to be inserted from the front edge thereof, and the holder 42 to which the switch main body 41 is attached is attached to the guide rail 7 so as to be inserted from the front edge thereof. The holder 42 is preferably made of a slightly soft material so as to absorb the contact of the roller 39.

As described above, since the long and flexible switch body 41 is attached to the inside of the guide rail 7 via the holder 42, the switch body 41 can be appropriately formed without causing unevenness. It can be easily attached to the guide rail 7. This makes it extremely easy to incorporate the emergency stop switch 15 into the guide rail 7, and also allows the emergency stop switch 15 to operate properly. Moreover, the switch body 41 can be easily replaced by removing the holder 42. The switch body 41 can also be configured with a proximity sensor, a contact sensor, an optical sensor, or the like.

Next, a second embodiment of the present invention will be described with reference to FIGS. 6 and 7. The switch operating mechanism 17 in this embodiment includes an upper link mechanism (pusher) 51 attached to a slat 22 and a bottom slat 21.
And a lower link mechanism (flexion / extension link) 52 attached to the. In this case, when the slats 22 and the bottom slats 21 are in a contracted and connected state (see FIG. 3A), the upper link mechanism 51 presses the lower link mechanism 52, and the lower link mechanism 52 bends in the left-right direction. Project.

The upper link mechanism 51 is attached to the slats 22 and is a mounting portion 53 that also serves as a small cap of the slats 22.
A support pin 54 penetrating the attachment portion 53 in the left-right direction, a first link 55 rotatably connected to the support pin 54, and a second link rotatably connected to the first link 55.
The link 56 and the third link 57 are rotatably connected to the second link 56, and the first link 55, the second link 56, and the third link 57 are all rotated in the front-rear direction. That is, the upper link mechanism 51 is configured to be bendable in the front-back direction.

The first link 55 is connected to the support pin 54 through a long hole 55a formed in the long side formed in the first link 55, and in this state, is urged downward by a spring 58 built in the mounting portion 53. ing. The spring 58 appropriately absorbs the pressing operation of the upper link mechanism 51. That is, since the pressing stroke of the upper link mechanism 51 and the projecting length of the lower link mechanism 52 are determined by the expansion and contraction stroke of the slats 22 and the bottom slats 21, the lower links are swayed or displaced due to the positional displacement of each slat 22. If the mechanism 52 is shorter than a predetermined protruding length, the emergency stop switch 15
It is conceivable to abut. In such a case, the reaction force of the emergency stop switch 15 is absorbed by this spring 58 so that a large force is not applied to each part of the switch operating mechanism 17.

An intermediate portion of the third link 57 is slidably guided by a mounting portion 60 of a lower link mechanism 52, which will be described later, and a lower end portion of the third link 57 also serves as a rotating pair on the input side of the lower link mechanism 52. . Therefore, when the slat 22 and the bottom slat 21 are in the extended connection state (see FIG. 3B), the third link 57 relatively moves downward via the first link 55 and the second link 56. Slat 22
And the bottom slat 21 are contracted and connected (Fig. 3
(See (a)), the third link 57 moves relatively upward.

The lower link mechanism 52 includes the bottom slats 2
1 is attached to the bottom slat 21 and also serves as a cap of the bottom slat 21, a protruding link 61 that is rotatably connected to the third link 57 in the left-right direction, and one end is rotatable to the attachment part 60. Attached to the other end and projecting link 6
1 and a support link 62 that is rotatably attached to the intermediate portion of No. 1. The roller 6 is attached to the tip of the protruding link 61.
3 is rotatably supported, and when the third link 57 moves upward, the projecting link 61 and the support link 62 expand, and the roller 63 is in a non-projecting state in the left-right direction (see FIG. 6). When the third link 57 moves downward, the protruding link 61 and the support link 62 bend, and the roller 63 is in a protruding state in the left-right direction (see FIG. 7).

Therefore, when the slat 22 and the bottom slat 21 are in the extended connection state (see FIG. 3B), the lower link mechanism 52 is extended via the upper link mechanism 51 to be in the non-projecting state. Meanwhile, the slats 22 and the bottom slats 21 are in a contracted and connected state (Fig. 3 (a)).
(See), the lower link mechanism 52 is bent via the upper link mechanism 51 to be in a protruding state. In this protruding state, the roller 63 contacts the emergency stop switch 15 and turns it on. Therefore, when a foreign object is sandwiched between the shutter body 5 and the lower frame 16, the emergency stop switch 15 is turned on and the lowering of the shutter body 5 is stopped.

As described above, the upper link mechanism 51 functions as a pusher of the lower link mechanism 52 which projects to actuate the emergency stop switch 15, but the upper link mechanism 51 itself is constructed to be bendable in the front-rear direction by its link structure. . Therefore, when the shutter curtain 5 is wound around the winding drum 4, the shutter curtain 5 is bent along the circumferential surface of the winding drum 4 and is straight when unwound. Therefore,
The switch operation mechanism 17 mounted so as to straddle between the slat 22 and the bottom slat 21 does not get in the way when the shutter curtain 5 is wound and unwound.
Moreover, unnecessary force does not act on the switch operating mechanism 17, and malfunction of the emergency stop switch 15 due to damage to the switch operating mechanism 17 can be prevented.

Next, a third embodiment of the present invention will be described with reference to FIGS. The switch operating mechanism 17 in this embodiment has an upper link member 71 attached to the slat 22 and a lower link member 72 attached to the bottom slat 21, as in the first embodiment. The link member 72 is the roller 7
3 are connected by a connecting pin 74. In this case, the upper link member 71 and the lower link member 72 bend and extend in the front-rear direction about the connecting pin 74 to project, and the emergency stop switch 15 is turned on via the roller 73.

When the switch operating mechanism 17 is in the non-protruding state, that is, when the upper link member 71 and the lower link member 72 are in the extended state, the roller 73 located at the tip in the bending direction is the shutter body. The emergency stop switch 15 is located on the front side of the mounting surface on the side of the emergency stop switch 15 so that the emergency stop switch 15 is not turned on (malfunction) even if the shutter body 5 shakes back and forth due to wind or the like.

The emergency stop switch 15 is attached to the inner wall surface of the guide rail 7 on the inner side in the prospective direction, corresponding to the switch operating mechanism 17. Also in this case, the emergency stop switch 15 is composed of the switch body 41 and the holder 42 as in the above-described embodiments. Further, a “C” -shaped mounting portion 75 for receiving the holder 42 is formed inside the guide rail 7. As a result, the switch main body 41 is attached to the holder 42 so as to be inserted from the front edge thereof, and the holder 42 having the switch main body 41 attached thereto is inserted from the front edge of the guide rail 7 to be attached thereto. .

As described above, since the switch main body 41 is attached to the guide rail 7 via the holder 42, the switch main body 41 can be properly and easily attached. This makes it extremely easy to incorporate the emergency stop switch 15 into the guide rail 7, and also allows the emergency stop switch 15 to operate properly.

In each of the above embodiments, the protruding structure portion of the switch operating mechanism is a toggle link mechanism, but it goes without saying that another link mechanism can be applied.

[0036]

According to the emergency stop device of the first aspect of the present invention, the protector hits the guide rail in preference to the switch operating mechanism in the non-protruding state, so that the shutter body shakes left and right and the slats shift left and right. Even if there is, it is possible to reliably prevent the malfunction of the switch.

According to the emergency stop device of the second aspect, it is possible to prevent the switch operating mechanism from being damaged at the time of winding and unwinding the shutter body, and to prevent the malfunction and malfunction of the switch due to this damage. can do.

According to the emergency stop device of the third aspect, since the holder can be mounted in the narrow space of the guide rail while the switch body is mounted, the switch body can be accurately and easily mounted on the guide rail. Moreover, the correct mounting of the switch body can prevent malfunction of the switch.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view of an electric shutter equipped with an emergency stop device according to the present invention.

FIG. 2 is a cross-sectional view of an electric shutter equipped with the emergency stop device of the present invention.

FIG. 3 is a cross-sectional view showing a connected state of the slats and the bottom slats.

FIG. 4 is a structural diagram around the emergency stop device according to the first embodiment.

FIG. 5 is a front view showing an operating state of the emergency stop device according to the first embodiment.

FIG. 6 is a structural diagram around an emergency stop device according to a second embodiment.

FIG. 7 is a front view showing an operating state of the emergency stop device according to the second embodiment.

FIG. 8 is a structural diagram around an emergency stop device according to a third embodiment.

FIG. 9 is a side view showing an operating state of the emergency stop device according to the third embodiment.

[Explanation of symbols]

1 electric shutter, 2 shutter body, 3 shutter frame, 5 shutter body, 7 guide rail, 12 motor, 15 emergency stop switch, 16 lower frame, 17 switch operating mechanism, 21 bottom slat, 22 slat,
34 protector, 35 upper link, 37 lower link, 41 switch body, 42 holder, 51 upper link mechanism, 52 lower link mechanism, 71 upper link member, 72 lower link member

Claims (3)

[Claims] 1. An electric shutter for stopping the lowering of the shutter body when a foreign object is sandwiched between a shutter body guided by guide rails on the left and right and lowered by a motor and a lower frame for receiving the shutter body. In the emergency stop device, the shutter body is disposed so as to straddle the side ends of any two slats that are extendably and contractably connected, and protrudes in the left-right direction when the slats are in a contracted and connected state. A switch operating mechanism, a switch provided on the guide rail corresponding to the switch operating mechanism, which is operated by a protrusion of the switch operating mechanism to stop the motor, and which is provided on a side end portion of the shutter body. With respect to the shake of the shutter body in the left-right direction, a protector that comes into contact with the guide rail in preference to the switch operation mechanism in the non-projecting state An emergency stop device for an electric shutter characterized by the above. 2. An electric shutter for stopping the lowering of the shutter main body when a foreign object is caught between the shutter main body which is guided by the guide rails on the left and right and is lowered by the motor, and the lower frame which receives the shutter main body. In the emergency stop device, the shutter body is disposed so as to straddle the side ends of any two slats that are extendably and contractably connected, and protrudes in the left-right direction when the slats are in a contracted and connected state. A switch operating mechanism; and a switch provided on the guide rail corresponding to the switch operating mechanism and operating by the protrusion of the switch operating mechanism to stop the motor, wherein the switch operating mechanism is one of the slats. And a pusher that is attached to the
It has a bending / extending link attached to the other slat and bent / extended by the pusher, the pusher advances when the slats are in a contracted connection state, and the bending / bending link bends due to the advance of the pusher to the left / right direction. An emergency stop device for an electric shutter, which is characterized in that it protrudes to the outside. 3. An electric shutter for stopping the lowering of the shutter main body when a foreign object is sandwiched between a shutter main body which is guided by guide rails on the left and right and descends by a motor and a lower frame which receives the shutter main body. In the emergency stop device, a switch operating mechanism that is disposed straddling the side ends of any two slats of the shutter body that are elastically connected, and that projects when the slats are in a contracted and connected state. And a switch provided correspondingly to the switch operating mechanism in the longitudinal direction of the guide rail, and actuated by the protrusion of the switch operating mechanism to stop the motor. An emergency stop for an electric shutter, characterized by having a holder mounted on the guide rail while holding the switch body. Stop device.