JP5802017B2 - Refurbishment method to electric shutter device - Google Patents

Description

  The present invention relates to an electric shutter device in which a manual winding shaft for winding and unwinding a shutter curtain is modified to an electric winding shaft that is rotated by a driving force of an electric motor, for example, a window shutter device And can be used for various shutter devices including a shutter device for entrance and exit.

  In the window shutter device disposed outside the window sash, the winding shaft rotates up and down to move up and down as the winding shaft rotates for winding and unwinding the shutter curtain. For shutter devices that have a winding shaft that is manually rotated by manually moving the shutter curtain up and down manually with a hand or operating rod, the shutter device is easier to handle and has higher quality. For this reason, it may be required to modify this manual winding shaft to an electric winding shaft that rotates with the driving force of the electric motor. As a prior art that can cope with such a modification, the following patents are available. The technique shown in Document 1 is known.

  In this prior art, an open / close device including an electric motor and a brake for braking the electric motor is housed in the electric winding shaft and supports the manual winding shaft. The support bracket and the bearing portion provided to receive the end of the manual take-up shaft are left as they are, and the manual take-up shaft is replaced with an electric take-up shaft. In addition, it is unnecessary to replace the support bracket for supporting the winding shaft.

JP 2004-257063 A

  By the way, in the shutter device modified to the electric type, when the rotation of the electric take-up shaft is stopped due to a power failure or the failure of the electric motor, the shutter curtain is moved to the hand or the operating rod like the manual type shutter device. Therefore, it is necessary to provide a switching member for switching on and off the brake of the opening / closing device in order to artificially move up and down by, for example.

  In this case, if the switching member is a string-like member led out from the switch, the string-like member is wired so that the brake can be turned on and off smoothly by operating the string-like member. It is required to devise in relation to existing support brackets and bearings.

  The object of the present invention is to enable smooth switching on and off of the brake by the switching member when the rotation of the electric winding shaft is stopped even if the existing support bracket and bearing are left. The present invention is to provide a modified electric shutter device.

In the modified electric shutter device according to the present invention, the manual winding shaft for winding and unwinding the shutter curtain includes an electric motor and a brake for braking the electric motor. The switch is housed and modified to an electric winding shaft that rotates by the driving force of the electric motor, and a support bracket for supporting the manual winding shaft, and the support bracket In a modified electric shutter device in which the bearing portion provided for receiving the end portion of the manual winding shaft is left and modified, when the rotation of the electric winding shaft is stopped And a switching member for switching the brake on and off. The switching member is a string-like member led out from the opening / closing device, and the string-like member is the support member. It is inserted through the hole formed in the bracket for use, and the place where the hole is formed is a place where the string-like member is not obstructed by the bearing portion provided in the support bracket. It is a feature.

  In the modified electric shutter device according to the present invention, when the rotation of the electric winding shaft is stopped, the brake of the switch accommodated in the electric winding shaft is turned on / off. The switching member for doing this is a string-like member derived from the switch. The string-like member is inserted into a hole formed in the support bracket (existing support bracket for supporting the manual winding shaft), and the position where the hole is formed is a string. The shape member is a portion that is not obstructed by a bearing portion provided on the support bracket (an existing bearing portion provided on the existing support bracket for receiving the end of the manual winding shaft).

  That is, the string-like member led out from the switch housed inside the electric take-up shaft passes through the electric take-up shaft and is not obstructed by the bearing portion of the support bracket (the place where no interference occurs). The wiring is inserted through the hole formed in the wiring.

  As a result, when the rotation of the electric winding shaft is stopped, the string-like member for switching on / off the brake of the opening / closing machine is not interfered with (not obstructed by) the bearing portion. ), Slides smoothly in the axial direction (left-right direction) of the electric winding shaft.

  For this reason, according to the present invention, even when the existing support bracket and the bearing portion are left, when the rotation of the electric winding shaft is stopped, the on / off switching operation by the switching member is smoothly performed. .

  In the present invention, the position where the hole through which the string-like member is inserted is arbitrary as long as the string-like member is not obstructed by the bearing portion provided in the support bracket. It is preferable that the support bracket is formed at a location that coincides with or substantially coincides with the extension axis of the electric winding shaft.

  According to this, the string-like member led out from the opening / closing machine housed in the electric winding shaft can be extended to the hole in the axial direction of the electric winding shaft, thereby The string-like member can be smoothly slid in the axial direction (left-right direction) of the electric winding shaft without being interfered by the bearing portion.

  In the present invention, the end portion of the electric take-up shaft may be received by a bearing portion provided in the support bracket, or another member provided in the support bracket (the end portion of the electric take-up shaft). And the support bracket may be received by an intermediate structure intervening without being disturbed by the bearing portion.

  In the present invention, the shape and structure of the bearing portion may be arbitrary, and as an example, a bearing portion main body having an upwardly open U shape having a bottom portion and rising portions rising from both ends of the bottom portion, And a flange portion projecting in an outer diameter direction of the electric take-up shaft from the end portion on the support bracket side in the bearing portion main body and coupled to the support bracket. be able to.

  When the bearing portion has the shape and structure described above, the hole through which the string-like member is inserted is surrounded by the bottom portion and the upright portion of the bearing portion body in the support bracket. It is preferable to be formed.

  In the present invention, a guide member made of a material softer than the support bracket is inserted into the hole through which the string-like member is inserted, and the string-like member is inserted into the inner hole of the guide member. May be.

  According to this, when the string member passes through the hole, the guide member can prevent the string member from being rubbed and damaged by the hole. That is, it is possible to prevent a decrease in durability of the string-like member due to rubbing against the hole.

  In addition, a part of the guide member having a curved portion curved according to the wiring direction of the string-like member is fitted into the hole through which the string-like member is inserted, and the guide member is supported by a stopper. You may make it stop to a bracket for use.

  According to this, as described above, when the string-like member passes through the hole, the guide member can not only prevent the string-like member from rubbing against the hole and being damaged, but also the curved portion of the guide member. Due to the bending guide action, the string-like member can be bent and wired in a predetermined direction, and as a result, the brake on / off switching operation by the string-like member can be performed more smoothly.

  In the present invention described above, the shutter curtain wound up and fed out by the electric winding shaft may be formed by combining a plurality of types of shutter curtain constituent members. However, it may be a sheet, a net, or a pipe or panel connected by a link.

  In addition, the present invention can be applied to various shutter devices in which a shutter curtain is wound around a winding shaft and fed out. One example of the shutter device is a window shutter device. It can also be applied to an entrance / exit shutter device that opens and closes with a shutter curtain.

  According to the present invention, even if the existing support bracket and the bearing portion are left, when the rotation of the electric winding shaft is stopped, the switching operation of the brake by the switching member can be smoothly performed. The effect is obtained.

FIG. 1 is a front view showing an entire window shutter device to which an embodiment of the present invention is applied. FIG. 2 is a perspective view showing a structure in which an end portion of the manual winding shaft shown in FIG. 1 is supported by a support bracket. FIG. 3 is an exploded perspective view showing the support structure of FIG. FIG. 4 is a front sectional view showing the structure of the electric take-up shaft modified from the manual take-up shaft. FIG. 5 is a front view showing a part of the windowed electric shutter device after being modified to the electric winding shaft. 6 is a cross-sectional view taken along line S6-S6 of FIG. FIG. 7 is a perspective view showing a support structure by a support bracket at the right end of FIG. 4 in the electric winding shaft. FIG. 8 is an exploded perspective view showing the support structure of FIG. FIG. 9 shows a structure in which an opening / closing machine housed in an electric take-up shaft and having an electric motor as a component is supported by a support bracket on the left side of FIG. 4 via an intermediate component. FIG. It is a top view which shows the support structure of FIG. 11 is a cross-sectional view taken along line S11-S11 in FIG. 12 is a cross-sectional view taken along line S12-S12 of FIG. FIG. 13 is an exploded perspective view showing each member constituting the first intermediate on the switch (electric motor) side in the intermediate structure shown in FIG. 9. FIG. 14 is an exploded perspective view showing the respective members constituting the second intermediate on the support bracket side in the intermediate structure shown in FIG. 9. FIG. 15 is a front view of the first intermediate. FIG. 16 is a side view of the first intermediate. FIG. 17 is a front view of the second intermediate. FIG. 18 is a side view of the second intermediate. FIG. 19 is a side view showing a bearing portion provided on the left support bracket of FIG. 4. FIG. 20 is a side view showing a member that is applied to the bearing portion of FIG. 19 and that constitutes the second intermediate shown in FIG. FIG. 21 is a side view showing another bearing portion that is different in shape and the like from the bearing portion of FIG. FIG. 22 is a side view showing a member applied to the bearing portion of FIG. 22 and corresponding to the member of FIG. FIG. 23 is a front sectional view showing an embodiment of a guide member provided on the support bracket in order to pass the string-like member shown in FIGS. 7 and 8 through the support bracket. 24 is a front sectional view showing a guide member according to another embodiment different from the guide member of FIG.

  EMBODIMENT OF THE INVENTION Below, the form for implementing this invention is demonstrated based on drawing. FIG. 1 shows an overall front view of a window shutter device to which an embodiment of the present invention is applied. The window shutter device shown in FIG. 1 is a manual shutter device before being modified to an electric shutter device.

  The manual window shutter device shown in FIG. 1 is installed on a part of the building outer wall 2 outside the window sash in which the shoji 1 is disposed. The manual shutter curtain 3 of the window shutter device includes a pair of left and right windows. The window opening on the outside of the window sash is opened and closed by being guided by the guide rail 4 and moving up and down. A shutter case 5 is disposed above the window opening, and an upper end of the shutter curtain 3 is connected to a manual take-up shaft 6 accommodated horizontally in the shutter case 5. The manual winding shaft 6 is rotatably supported by a pair of left and right support brackets 7 and 8.

  The shutter case 5 includes a main body 5A and a pair of left and right lid members 5B and 5C that close both left and right ends of the main body 5A.

  When the seat plate 3A at the lower end of the shutter curtain 3 is manually pushed up by hand or the like, the shutter curtain 3 is wound around the take-up shaft 6 and moved upward. When the seat plate 3A is pushed down, the shutter curtain 3 is It is drawn out from the take-up shaft 6 and moved downwardly. The take-up shaft 6 houses a return spring by a torsion coil spring that accumulates a return spring force when the shutter curtain 3 is drawn out from the take-up shaft 6. Winding up and moving upward on the winding shaft 6 is performed with the aid of the return spring force of the return spring.

  The winding shaft 6 is supported by the pair of left and right support brackets 7 and 8, and shaft portions 6 A and 6 B that are ends at both ends in the axial direction of the winding shaft 6 are provided on these brackets 7 and 8. This is performed by being supported by the bearing portions 9 and 10. FIG. 2 shows a support structure of the shaft portion 6B of the winding shaft 6 by the bearing portion 10 of one bracket 8 of the support brackets 7 and 8, and the other bracket 7 and the bearing portion 9 The support structure of the shaft portion 6A of the winding shaft 6 by the bearing portion 9 is the same as that shown in FIG.

  Next, the structure of the manual winding shaft 6 and the support structure of FIG. 2 will be described. As described above, the manual type take-up shaft 6 contains a return spring in which the return spring force is accumulated when the shutter curtain 3 is drawn out from the take-up shaft 6. The shaft portion 6B is formed by this end portion of the non-rotating shaft that is inserted into the winding shaft 6 while leaving the end portion, and a bearing member is interposed between the non-rotating shaft and the winding portion 6B. The take-up shaft 6 is rotatable around this non-rotating shaft. Further, one end of a return spring housed in the take-up shaft 6 is connected to this non-rotation shaft or another non-rotation shaft forming the shaft portion 6A, and the other end of the return spring is wound around the other end of the return spring. The shaft 6 is connected. Therefore, as described above, when the shutter curtain 3 is unwound from the take-up shaft 6, the return spring force is accumulated on the return spring by the rotation of the take-up shaft 6, and the shutter curtain 3 is taken up by the take-up shaft 6. The rotation of the winding shaft 6 is assisted by the return spring force.

  As shown in FIG. 2, the bracket 8 made of sheet metal includes a bracket main body 8A, a rear end bent portion 8B provided for reinforcement of the bracket main body 8A, and a lower end bent portion 8C. The bracket 8 is fixed to the building outer wall 2 by joining the rear bent portion 8B to the building outer wall 2 shown in FIG. The bracket main body 8A is provided with the bearing portion 10 for receiving and supporting the shaft portion 6B of the winding shaft 6.

  The bearing portion 10 is formed by a single bearing member that is a bent product of a sheet metal. The bearing portion 10 is formed from the bearing portion body 16 and the bracket body 8A side of the bearing portion body 16. The flange portion 17 protrudes in the outer diameter direction of the winding shaft 6. The bearing portion main body 16 has a bottom portion 16A and rising portions 16B and 16C rising from both ends of the bottom portion 16A, and thus has a U-shape opening upward. Further, the flange portion 17 extends horizontally from the lower portion of the bearing portion main body 16, in other words, from the first protruding portion 17 </ b> A that protrudes downward from the bottom portion 16 </ b> A, and from both sides of the bearing portion main body 16, in other words, from the upright portions 16 </ b> B and 16 </ Or it consists of two 2nd protrusion parts 17B and 17C which protrude in a substantially horizontal direction, and these 1st and 2nd protrusion parts 17A-17C are couple | bonded with brackets 8A with coupling tools, such as welding or a rivet. Thus, the bearing portion 10 formed by the bearing member is provided on the support bracket 8.

  As shown in FIG. 3, holes 11 to 13 are formed in the upright portions 16 </ b> B and 16 </ b> C of the bearing body 16 and the shaft section 6 </ b> B of the winding shaft 6, and the shaft section 6 </ b> B is inserted into the bearing section body 16. After that, the bolts 14 are inserted into the holes 11 to 13, and the nuts 15 are screwed into the shaft ends of the bolts 14 protruding from the holes 13 of the upright portion 16C. The formed shaft portion 6B is in a non-rotating state and is supported by the bearing portion main body 16 of the bearing portion 10.

  FIG. 4 shows an electric take-up shaft 20 that is replaced from the manual take-up shaft 6 in order to upgrade the manual shutter device for windows to an electric shutter device for windows. An opening / closing machine 21 is housed inside the end of the electric take-up shaft 20 on the support bracket 8 side. The switch 21 includes an electric motor 21C, a brake 21D for braking the electric motor 21C, and a control device 21B that performs drive control of the electric motor 21C and electrical control of turning on and off the brake 21D. It is configured to include. In FIG. 4, the electrical wiring of these devices is omitted. As will be described later, the brake 21D of the opening / closing machine 21 rotates when the winding shaft 20 is rotated by the rotational driving force of the electric motor 21C and the shutter curtain 3 reaches the fully open position or the fully closed position. When the detection signal is detected by a number detection sensor or the like and this detection signal is input to the control device 21B, or when a stop signal from the operation device for operating rotation or stop of the electric motor 21C is input to the control device 21B. The rotation driving of the output member of the electric motor 21C is stopped to bring the winding shaft 20 into the rotation stopped state.

  The opening / closing machine 21 is provided with a ring-shaped drive member 22 that is rotated by rotation of the output member of the electric motor 21 </ b> C, and a winding shaft 20 is formed in a plurality of grooves 22 </ b> A formed in the circumferential direction of the drive member 22. Since the protrusion 20 </ b> A provided on the inner surface is inserted, the drive member 22 and the winding shaft 20 are connected in the rotational direction of the winding shaft 20. For this reason, when the drive member 22 is rotated by the rotational drive of the output member of the electric motor 21C, the winding shaft 20 is rotated. Further, a ring-shaped driven member 23 that rotates integrally with the winding shaft 20 is fitted to the outer periphery of the opening / closing device 21, and the rotation of the winding shaft 20 by the rotational driving force of the electric motor 21 </ b> C is the driven. The member 23 serves as a rotary bearing member between the winding shaft 20 and the switch 21.

  On the other hand, a return spring unit 24 is inserted into the end of the electric winding shaft 20 on the support bracket 7 side. The return spring unit 24 is disposed between the non-rotating central shaft 25, two wheel members 27 rotatably disposed on the central shaft 25 by bearing members 26, and the wheel members 27. And two return springs 28 by a torsion coil spring. Each wheel member 27 is coupled to the take-up shaft 20 by rivets or the like, and one end of each return spring 28 is coupled to the central shaft 25 by a coupling tool 29A, and the other end is coupled to the winding shaft 29 by a coupling tool 29B. The wheel member 27 is connected.

  For this reason, after the upper end of the electric shutter curtain, which will be described later, is connected to the electric winding shaft 20, the electric winding shaft 20 winding the electric shutter curtain is driven by the rotational driving force of the electric motor 21C. When the electric shutter curtain is drawn out by rotating around the non-rotating central shaft 25, a return spring force is accumulated in the return spring 28, and this return spring force is applied to the electric winding shaft 20 by the electric motor 21C. This is used as an auxiliary force when the electric shutter curtain is wound up in reverse rotation by the rotational driving force.

  In the present embodiment, as shown in FIG. 4, the shaft end portion 25 </ b> A of the central shaft 25 protrudes from the winding shaft 20, and therefore, this shaft end portion 25 </ b> A is in the electric winding shaft 20. An end portion on the side of the support bracket 7 is formed, and the shaft end portion 25A is supported by the bearing portion 9 of the support bracket 7 which is also used for the manual winding shaft 6. ing. The shaft end portion 25A and the bearing portion 9 are connected by a bolt 14 and a nut 15 with the same structure as described in FIGS. 3 and 4 as shown in FIGS. Yes.

  For this reason, in this embodiment, in order to support the shaft end portion 25A of the central shaft 25 forming the end portion on the support bracket 7 side of the electric winding shaft 20, the manual shutter device for windows is used. The existing support bracket 7 and the existing bearing 9 provided on the bracket body 7A of the support bracket 7 are used.

  The bracket body 7A and the shaft end portion 25A of the center shaft 25 are connected between the bracket body 7A of the existing support bracket 7 and the shaft end portion 25A of the center shaft 25 without being obstructed by the existing bearing portion 9. An intermediate construct may be intervened.

  FIG. 9 shows a structure for connecting and supporting the end of the electric take-up shaft 20 on the side of the support bracket 8 to the support bracket 8 described in FIG. 2 and FIG. FIG. 10 is a front view of this structure, and FIG. 10 is a plan view of this structure. The end of the electric take-up shaft 20 on the side of the support bracket 8 is connected and supported to the bracket body 8A of the support bracket 8 by an intermediate structure 30. More specifically, an end 21A on the support bracket 8 side of the switch 21 housed and fixed inside the electric winding shaft 20 is exposed from the winding shaft 20, and the electric motor 21C is exposed. This end portion 21A of the opening / closing device 21 which is a constituent element is connected and supported to the bracket body 8A of the support bracket 8 by the intermediate structural body 30, whereby the support bracket 8 of the electric winding shaft 20 is supported. The end portion on the side and the bracket body 8A of the support bracket 8 are connected and supported via the switch 21 and the intermediate structure 30.

  Therefore, the existing support bracket 8 is used as it is even after the manual take-up shaft 6 is modified to the electric take-up shaft 20, and the support bracket 8 is also provided. The bearing 10 shown in FIGS. 2 and 3 is left as it is. The intermediate structure 30 for connecting the opening / closing machine 21 and the bracket main body 8A of the supporting bracket 8 is not obstructed by the bearing portion 10 and can be understood from the description below. The bracket body 8A is interposed.

  FIG. 5 shows a front view of the windowed electric shutter device after the manual winding shaft 6 has been modified to the electric winding shaft 20, and in this embodiment, the manual winding shaft 6 is shown. 1 to the electric winding shaft 20, the manual shutter curtain 3 shown in FIG. 1 is retrofitted to the electric shutter curtain 31 shown in FIG. The left and right ends of the electric shutter curtain 31 whose upper end is connected to the electric take-up shaft 20 are slidably inserted into the pair of left and right guide rails 4 shown in FIG. By winding and unwinding by the electric winding shaft 20, the guide rail 4 guides and opens and closes up and down. The entirety of the shutter curtain 31 is formed by connecting a large number of slats 32 in the vertical direction, excluding ancillary members such as a seat plate.

  6 is a cross-sectional view taken along line S6-S6 of FIG. 5. As shown in FIG. 6, curl portions 33 are formed at the upper and lower ends of each slat 32, and the lower end curl of the upper slat 32A is formed. The portion 33A and the upper end curl portion 33B of the lower slat 32B engage with each other so that the slats 32A and 32B are rotatably connected. Since each curled portion 33 has the same cross-sectional shape in the left-right direction, the curled portion 33 is located away from the pair of left and right guide rails 4, that is, inside the shutter case 5 shown in FIG. In this place, each slat 32 is in a state where it may slide in the left-right direction.

  In addition, when at least a part of the manual shutter curtain 3 shown in FIG. 1 is formed by connecting a plurality of slats, the intermediate structure 30 according to the present embodiment includes the manual winding shaft 6. The present invention can also be applied to the case where the manual shutter curtain 3 is used as the electric shutter curtain after being modified to the electric take-up shaft 20.

  That is, the intermediate structure 30 according to the present embodiment can also be applied to the case where the existing manual shutter curtain 3 at least partially formed by connecting slats is used as an electric shutter curtain.

  As shown in FIG. 4, a string-like member 35 made of a wire or the like is led out from the opening / closing machine 21. This string-like member 35 is used to switch the above-described brake 21D, which is a component of the opening / closing device 21 together with the electric motor 21C, on and off when the rotation of the electric winding shaft 20 is stopped. Switching member. That is, when the shutter 21 D is turned on and the rotation of the electric take-up shaft 20 is stopped, when the shutter curtain is fully opened or fully closed, for example, when a power failure occurs, the string member 35 Is pulled once, the brake 21D is turned off. Therefore, even if the winding shaft is modified from the manual winding shaft 6 to the electric winding shaft 20, the electric winding shaft 20 is free. Thus, the electric shutter curtain 31 can be manually opened and closed. When the string-like member 35 is pulled once more, the brake 21D is turned on, so that the switch 21 returns to the state before the pulling operation, and the electric winding shaft 20 is in a state where it cannot rotate freely. Thus, the electric shutter curtain 31 cannot be manually opened and closed.

  A mechanism for enabling the brake of the switch to be turned on and off by pulling the string-like member is already well known. For example, Japanese Patent Application Laid-Open No. 2004-27841 discloses a mechanism in which a clutch mechanism for transmitting a driving force of a motor to a winding shaft is disconnected and connected by pulling a string member. The embodiment is also provided with a mechanism similar to this. For this reason, the detailed description about the mechanism for enabling the brake 21D of the switch 21 to be turned on and off by pulling the string-like member 21D described above is omitted.

  As can be seen from FIG. 4, the string-like member 35 extends from the opening / closing machine 21, and the string-like member 35 extends from one end of the above-described central shaft 25 which is a hollow member. It is inserted inside.

  As can be seen from FIGS. 7 and 8, the bearing portion 9, like the bearing portion 10, projects in the outer diameter direction of the winding shaft 20 from the bearing portion body 18 and the bracket body 7 </ b> A side of the bearing portion body 18. The flange portion 19 is formed. The bearing portion main body 18 has a bottom portion 18A and upright portions 18B and 18C rising from both ends of the bottom portion 18A, and thus has a U-shape that opens upward. Further, the flange portion 19 extends horizontally from the lower portion of the bearing portion main body 18, in other words, from the first protruding portion 19A that protrudes downward from the bottom portion 18A, and from both sides of the bearing portion main body 18, in other words, from the upright portions 18B and 18C. Or it consists of two 2nd protrusion parts 19B and 19C which protrude in a substantially horizontal direction, and these 1st and 2nd protrusion parts 19A-19C are couple | bonded with the bracket main body 7A with coupling tools, such as welding or a rivet. Thus, the bearing portion 9 formed by the bearing member is provided on the support bracket 7.

  Further, as can be seen from FIGS. 7 and 8, of the portions surrounded by the bottom portion 18 </ b> A of the bearing portion main body 18 and the upright portions 18 </ b> B and 18 </ b> C in the bracket main body 7 </ b> A of the support bracket 7, A hole 36 is formed at a location that coincides with or substantially coincides with the extension axis.

  The support bracket 7 is disposed on the opposite side of the electric winding shaft 20 in the axial direction from the support bracket 8 with or without the intermediate structure 30 described above. The portion where the hole 36 is formed in the support bracket 7 is a portion that is not obstructed by the bearing portion 9 provided in the bracket body 7A of the support bracket 7. Since the string-like member 35 that is inserted into the center shaft 25 and protrudes from the other end of the center axis 25 is passed through the hole 36, the string-like member 35 interferes with the bearing portion 9. In other words, it is wired without being disturbed by the bearing 9.

  The wiring state of the string-like member 35 thereafter is shown in FIG. 5, and the string-like member 35 is placed inside the cap member 37 attached to one lid member 5B of the shutter case 5 described in FIG. Further, the string-like member 35 is led out from the cap member 37 and the lid member 5B, and the terminal portion of the string-like member 35 is connected to a tension operation member 38 disposed on one of the pair of left and right guide rails 4. Has been. For this reason, when the pulling operation member 38 is pulled, the brake 21 </ b> D of the opening / closing machine 21 is switched on and off via the string-like member 35.

  As described above, when the rotation of the electric winding shaft 20 is stopped, the string-like member 35 for switching the brake 21D of the switch 21 on and off is provided inside the electric winding shaft 20. In this case, the electric winding shaft 20 smoothly slides in the axial direction (left-right direction) without being interfered with the bearing portion 9.

  For this reason, according to this embodiment, even if the existing support bracket 7 and the bearing portion 9 remain, when the rotation of the electric winding shaft 20 is stopped, the brake 21D of the opening / closing device 21 by the string-like member 35. The on / off switching operation is smoothly performed.

  FIG. 5 also shows an electric circuit for supplying power to the electric motor 21 </ b> C of the switch 21. The power line 39 of the electric circuit is inserted into the lid member 5C from a cap member 40 attached to the other lid member 5C of the shutter case 5, and the power line 39 is further connected to the support bracket 8 described above. Is inserted into a hole formed in the bracket main body 8A, and also inserted into the intermediate structure 30 connected to the bracket main body 8A. The motor 21C, the brake 21D, and the control device 21B provided in the opening / closing machine 21 for electrical control of the electric motor 21C and the brake 21D are reached. When the intermediate structure 20 is not provided in the support bracket 8, the power line 39 is inserted into a hole formed in the bracket body 8 </ b> A of the support bracket 8 and then the electric motor 21 </ b> C of the switch 21. The brake 21D and the control device 21B may be reached.

  Further, the hole formed in the bracket main body 8A of the support bracket 8 for passing the power supply line 39 is located at a position of the bracket main body 8A that is coincident with or substantially coincides with the extension axis of the electric winding shaft 20. Since this portion is formed and is not obstructed by the bearing portion 10 provided in the support bracket 8, the power line 39 does not interfere with the bearing portion 10, that is, the bearing portion. It is wired without being disturbed by 10.

  FIG. 5 also shows a ground wire 49 in which the switch 21 and the support bracket 8 are wired in parallel with the power supply line 39. The ground wire 49 is connected to the support bracket 8 by a relay member. It is used as and extends downward.

  Further, although not shown in the drawings, when the manual winding shaft 6 is refurbished to the electric winding shaft 20, the electric shutter curtain 31 can be opened, closed, moved and stopped by remote control. In order to achieve this, the electric window shutter device is provided with “open”, “closed”, and “stop” buttons for rotating the electric winding shaft 20 forward, reverse, and rotation. Operating device is added.

  This operating device may be connected to the above-described control device 21B for controlling the drive of the electric motor 21C of the switch 21 and the operation of the brake 21D by a wireless method, or the control device 21B and a signal line. It may be connected by a wired system using. When the operating device is connected to the control device 21B in a wired manner using a signal line, the signal line is connected to the hole formed in the cover member 5C of the shutter case 5 shown in FIG. Is passed through a hole formed in the bracket body 8A and wired to the electric winding shaft 20 side where the control device 21B is disposed. The signal line is passed through a hole formed in the cap member 40 attached to the lid member 5C shown in FIG. 5, and the hole formed in the lid member 5C or the bracket body 8A of the support bracket 8 is provided. You may pass through the hole formed.

  Further, the control device 21B is disposed through the signal line through the hole formed in the lid member 5B of the shutter case 5 and the hole formed in the bracket body 7A of the support bracket 7 shown in FIG. The electric winding shaft 20 may be wired, and the signal line may be passed through a hole formed in the cap member 37 attached to the lid member 5B to form a hole formed in the lid member 5C, You may pass through the hole formed in the bracket main body 8A of the bracket 8 for support.

  As shown in FIGS. 9 and 10, the intermediate structural body 30 that connects the end 21 </ b> A of the opening / closing machine 21, which is a component of the electric motor 21 </ b> C, and the bracket body 8 </ b> A of the support bracket 8. Consists of a first intermediate 41 disposed on the switch 21 side and a second intermediate 42 disposed on the bracket body 8A side of the support bracket 8, and these first and second The intermediates 41 and 42 are connected to each other by a connection tool 43 such as a screw that can be rotated with a tool or the like from the front side (front side as viewed from the operator) of the window shutter device, so that the switch 21 The end 21 </ b> A and the bracket body 8 </ b> A of the support bracket 8 are connected by the intermediate structure 30.

  11 and 12 are sectional views taken along lines S11-S11 and S12-S12 in FIG. In addition, FIG. 13 shows the respective members 51 and 52 constituting the first intermediate 41, and FIG. 14 shows the respective members 61 to 63 constituting the second intermediate 42. Yes. 15 and 16 are a front view and a side view of the first intermediate 41, and FIGS. 17 and 18 are a front view and a side view of the second intermediate 42. Yes.

  As shown in FIG. 13, the first intermediate 41 on the side of the switch 21 is formed by a first member 51 and a second member 52 made of sheet metal. The overall shape of the first member 51, which is a sheet metal punched product, is a substantially T-shape composed of a narrow part 51A having a small front-rear dimension and a large vertical dimension, and a wide part 51B having a large front-rear dimension and a small vertical dimension. A recess 53 is formed in the narrow part 51A, and a hole 54 is provided in the wide part 51B. Further, the second member 52, which is a bent product of sheet metal, is a substantially M-shaped member in which the tongue piece 52C is provided at the center in the vertical direction, and is a part above and below the tongue piece 52C. A hole 55 is formed in 52A and 52B, and a hole 56 is also formed in the tongue piece 52C.

  As can be seen from FIG. 15 and FIG. 16, the first member 51 and the second member 52 are combined by inserting the tongue piece portion 52 </ b> C into the recess 53, whereby the first intermediate 41 is assembled. After that, the first member 51 and the second member 52 are joined by welding. As can be seen from FIG. 11, the first intermediate 41 is fastened to the end face of the end portion 21 </ b> A of the opening / closing machine 21 by a fastening tool 57 such as a screw inserted into the holes 54 and 56. As a result, as shown in FIGS. 9 and 10, the second member 52 protrudes from the first member 51 to the bracket body 8 </ b> A side of the support bracket 8.

  Further, as shown in FIG. 14, the second intermediate 42 on the bracket body 8 </ b> A side of the support bracket 8 is formed by a first member 61, a second member 62, and a third member 63 made of sheet metal. In the second member 62, there are two upper and lower members of the same size and shape. The overall shape of the first member 61, which is a sheet metal punched product, is circular, and a large rectangular opening 64 is formed at the center, and the electric winding shaft 20 is formed at each side of the opening 64. A recess 65 extending in the outer diameter direction is formed, and two of the four recesses 65 are provided with two narrow recesses 65 extending in the front-rear direction. Further, the first member 61 is provided with two holes 67 on the outer side of the upper and lower concave portions 65, and the front and rear portions of the first member 61. A total of four holes 68 are provided in the circumferential direction of the first member 61 at locations above and below the center.

  The two second members 62, each of which is a stamped product of sheet metal, are only in the opposite directions and have the same shape with the same dimensions, so the second member 62 on the lower side of FIG. , The entire shape of the second member 62 is such that both ends of the arcuate contour portion 62A that is the same arc shape as a part of the circular outer contour portion 61A of the first member 61 extend linearly. It has a substantially crescent shape connected by a straight portion 62B, and a concave portion 69 extending downward is formed in the straight portion 62B. And the thickness dimension of the 2nd member 62 which has an area smaller than the 1st member 61 is the flange part 17 of the bearing part 10 provided in the bracket 8 for support demonstrated in FIG.2 and FIG.3. It corresponds to the thickness dimension of the first and second projecting portions 17A to 17C, that is, the thickness dimension of the second member 62 and the thickness of the first and second projecting portions 17A to 17C. The dimensions are the same.

  Further, as shown in FIGS. 19 and 20, the shape of the concave portion 69 of the second member 62 is a quadrangle corresponding to the shape of the first projecting portion 17 </ b> A of the bearing portion 10. The front-rear dimension 69 (left-right dimension in FIG. 20) L1 corresponds to the front-rear dimension (left-right dimension in FIG. 19) L2 of the first protrusion 17A, and these dimensions L1, L2 are the same. Note that the vertical dimension L3 of the recess 69 is smaller than the vertical dimension L4 of the first protrusion 17A.

  The third member 63 of the second intermediate 42 shown in FIG. 14 is a bent product of sheet metal, and the overall shape of the third member 63 includes a web portion 63A having a vertical dimension and upper and lower ends of the web portion 63A. It has a cross-sectional channel shape composed of flanges 63B and 63C extending rearward from the rear. Further, a concave portion 70 is formed at the end portion of the web portion 63A on the side of the winding shaft 20 which is one end portion of the electric winding shaft 20 in the axial direction. Screw holes 71 are formed.

  In order to assemble the second intermediate 42 by the above first to third members 61 to 63, as can be seen from FIGS. 17 and 18, the upper and lower second members 62 are connected to the second members 62. The direction is turned upside down, and the first member 61 is brought into contact with one surface of the first member 61, that is, the surface of the support member 8 of the first member 61 on the side of the bracket body 8A. 62A is made to coincide with the upper and lower portions of the outer contour portion 61A of the first member 61, and the upper and lower second members 62 are joined to the first member 61 by spot welding or the like.

  Further, the third member 63 is positioned on the opposite side of the surface of the first member 61 to which the second member 62 is coupled to the front side of the large opening 64 of the first member 61 when viewed from the operator. The second member 62 and the third member 63 are joined by welding or the like.

  As shown in FIGS. 9 and 10, the second intermediate 42 manufactured in this way has the third member 63 moved from the first member 61 and the second member 62 toward the electric winding shaft 20. It is prominent.

  Further, as shown in FIG. 12, the support bracket 8 is provided on the second intermediate 42 which is a component constituting a part of the intermediate structure 30 shown in FIGS. In the bearing portion 10, the opening portion into which the bearing portion main body 16 can be inserted is formed by the large opening portion 64 of the first member 61 of the second intermediate 42. The intermediate part 42 includes a flange part accommodating part 75 (FIGS. 12 and 18) that can accommodate the first protruding part 17A of the flange part 17 coupled to the bracket body 8A of the support bracket 8 in the bearing part 10. Is formed by the recess 69 of the lower second member 62 out of the two upper and lower second members 62. In addition, the second intermediate 42 includes a flange portion accommodating portion 76 (see FIGS. 12 and 18) that can accommodate the two second projecting portions 17 </ b> B and 17 </ b> C of the flange portion 17. It is formed by the part of the interval between the individual second members 62.

  As shown in FIGS. 9 and 10, the second intermediate 42 described above is a bracket body 8 </ b> A of the support bracket 8 that has been present since the window-type electric shutter device is a window-type manual shutter device. Will be attached to. This attachment work is performed by accommodating the first projecting portion 17A in the flange portion accommodating portion 75 formed by the concave portion 69 of the lower second member 62 of the two upper and lower second members 62 and accommodating the flange portion. An opening formed in the first member 61 with the bearing portion main body 16 of the bearing portion 10 provided in the bracket main body 8A being accommodated by accommodating the second projecting portions 17B and 17C in the portion 76. Inserted into the section 64.

  Next, of the four holes 68 provided in the first member 61 described with reference to FIG. 14, the positioning pin 77 (see FIG. 12) is inserted into one hole 68 on the front side and the upper side of the operator. By inserting and positioning the positioning pin 77 through the upper second member 62 and the bracket body 8A, the second intermediate 42 is temporarily positioned and fixed to the bracket body 8A.

  When the second intermediate 42 is temporarily positioned and fixed to the bracket body 8A by the positioning pins 77 as described above, the portion of the large opening 64 of the first member 61 into which the third member 63 is inserted is 12, the switch 21 described with reference to FIG. 4 is housed and disposed inside the electric winding shaft 20 even if the second intermediate 42 is turned upside down. 4 is the end opposite to the end of the take-up shaft 20 shown in FIG. 4, so that the intermediate structural body 30 is arranged on the right support bracket 7 side in FIG. Even if it is supposed to be, since the four holes 68 into which the positioning pins 77 can be inserted are provided in the circumferential direction of the first member 61, the operator is on the front side and the upper side where it is easy to work. The positioning pin 77 is inserted into one hole 68 provided at the location where the It can be.

  After performing the above operation, as can be seen from FIG. 12, the fastening member 78 such as a rivet is attached to the lower hole 67 out of the two holes 67 provided on the upper and lower sides of the first member 61. Fasteners 79 such as rivets are also inserted into the notches 66 provided in two on the 61, and the fasteners 78 are inserted into the second member 62 and / or the first projecting portion 17A of the bearing portion 10 and the bracket body. 8A, and the fastening tool 79 is passed through the second projecting portions 17B and 17C of the bearing portion 10 and the bracket body 8A. Thereby, the second intermediate 42 is fixed to the bracket body 8A of the support bracket 8 by the fixing tools 78 and 79.

  As described above, when the second intermediate 42 is fixed to the bracket body 8A of the support bracket 8 by the fixing tools 78 and 79, the third member 63 is inserted into the large opening 64 of the first member 61. 12 is the opposite side of FIG. 12, the second intermediate 42 is turned upside down, and the switch 21 described with reference to FIG. Since the place accommodated inside is the end opposite to the end of the take-up shaft 20 shown in FIG. 4, the intermediate structure 30 is the right support bracket 7 in FIG. Even if the first member 61 is to be disposed on the side, the first member 61 has two holes 67 on the upper and lower sides and two notches 66 on the front and rear, so that the second intermediate 42 is supported by the fasteners 78 and 79. The work of fixing the bracket 8 to the bracket body 8A can be performed as prescribed.

  Next, the first intermediate 41 attached to the end 21 </ b> A of the opening / closing machine 21 protruding from the opening end of the electric winding shaft 20 is brought close to the support bracket 8, and the second member 52 of the first intermediate 41 is used. And the tip of the third member 63 of the second intermediate 42 are overlapped in the front-rear direction as shown in FIGS. 9 to 11 and formed on the second member 52 of the first intermediate 41. Screws formed by inserting two of these connecting tools 43 into the third member 63 of the second intermediate 42 by inserting the connecting tools 43 such as screws described in FIG. 9 and FIG. Screw into hole 71 and tighten.

  As a result, the first intermediate 41 and the second intermediate 42 are connected, and the intermediate structure 30 formed by this connection is used to support the opening / closing device 21 housed in the electric winding shaft 20 and the support The bracket body 8A of the bracket 8 is connected.

  In the above, the second member 52 of the first intermediate 41 and the third member 63 of the second intermediate 42 are centered in the front-rear direction of these intermediates 41 and 42 as shown in FIG. Therefore, the connecting work of the first and second intermediates 41 and 42 by the connecting tool 43 can be easily performed.

  And in this embodiment, the dimension of the diameter direction of the electric winding shaft 20 about the 1st member 61 used as the structural member of the 2nd intermediate 42 is D1 shown by FIG.9 and FIG.10. This dimension D1 is the largest dimension among the dimensions of the members constituting the intermediate structural body 30, and this dimension D1 is larger than the diameter dimension D2 of the electric winding shaft 20. It is getting smaller. The arrangement position of the intermediate structural body 30 in the support bracket 8 is set so that the intermediate structural body 30 enters the inside of the extended diameter dimension obtained by extending the diameter dimension D2 toward the support bracket 8.

  Therefore, the slat 32 constituting the electric shutter curtain 31 shown in FIG. 5 may slide in the left-right direction inside the shutter case 5 as described above. Even if it occurs, in other words, even if the shutter curtain constituting member constituting the shutter curtain 31 is wound around the electric take-up shaft 20 while being shifted in the left-right direction, the shifted shutter curtain constituting member is transferred to the intermediate structure 30. Therefore, smooth winding and feeding by the shutter curtain 31 by the winding shaft 20 can be ensured.

  Further, the first member 61 having the above-described dimension D1 is coupled to the bracket body 8A of the support bracket 8 via the second member 62 which is a plate shape of the second intermediate 42. Since the first member 61 is disposed at a position far away from the take-up shaft 20, even if the end of the slat 32 that slides in the left-right direction bends downward, it interferes with the intermediate structure 30. Can be prevented.

  In addition, even if the shutter curtain constituting member is wound around the electric take-up shaft 20 while being shifted in the left-right direction, the intermediate construct 30 is configured as long as it does not interfere with or substantially interfere with the intermediate construct 30. The dimension of the part that is a member or the part that is a part of the intermediate structural body 30 is made larger than the diameter dimension D2 of the electric winding shaft 20, and this part is inside the above-mentioned extended diameter dimension. You may make it not enter. As an example of this, the dimensions of the first member 61 and the second member 62 that are located far from the take-up shaft 20 and close to the main body 8A of the support bracket 8 are the same as the electric take-up shaft 20. And the first member 61 and the second member 62 are prevented from entering the inside of the above-mentioned extended diameter dimension.

  The diameter D2 of the electric take-up shaft 20 described above is, for example, when the upper end of the electric shutter curtain 31 is coupled to the outer peripheral surface of the electric take-up shaft 20 through a suspension member. It is a dimension including the accessory member provided in the cutter curtain 31 and the electric winding shaft 20 such as the suspension member.

  Further, the diameter D2 of the electric take-up shaft 20 is wound around the electric take-up shaft 20 even when the electric shutter curtain 31 is moved to the fully closed position at the upper end of the electric shutter curtain 31. In the case where there is a discarded winding part, the dimension includes the discarded winding part. Further, when the electric shutter curtain 31 is closed and moved to the fully closed position on the upper end of the electric shutter curtain 31, Even if it is a part that is fed out from the type take-up shaft 20, if the part that is fed out is a part that is not likely to be shifted in the left-right direction with respect to the electric type take-up shaft 20, the dimensions include this part. .

  In the present embodiment, the opening 64 formed in the first member 61 that is a constituent member of the second intermediate 42 is an existing bearing portion provided in the bracket body 8 </ b> A of the support bracket 8. 10, the bearing portion main body 16 and the flange portion 17 are sized so that only the bearing portion main body 16 can be inserted. Therefore, the opening can be inserted into both the bearing portion main body 16 and the flange portion 17. The size of the opening 64 can be reduced as compared with the case where the first member 61 and the strength of the second intermediate 42 in which the first member 61 is a constituent element. Furthermore, the strength of the intermediate structure 30 in which the second intermediate 42 is a constituent element can be sufficiently increased.

  Further, in the present embodiment, the bearing part body 16 of the existing bearing part 10 is inserted into the opening 64 of the first member 61 of the second intermediate 42 and is coupled to the bracket body 8A in the bearing part 10. The first projecting portion 17A which is the flange portion 17 is accommodated in a flange portion accommodating portion 75 which is formed between the bracket main body 8A by the concave portion 69 of the second member 62 of the second intermediate 42, Further, the two second projecting portions 17B and 17C, which are another flange portion 17 of the bearing portion 10, are separated from the bracket main body 8A by a distance between the upper and lower second members 62 of the second intermediate 42. The intermediate structure 30 that connects the opening / closing machine 21 and the bracket body 8A of the support bracket 8 is disturbed by the existing bearing section 10. A free, will have been intervening between these driving device 21 and the bracket body 8A of the support bracket 8.

  Further, since the dimension L1 and the dimension L2 shown in FIGS. 19 and 20 are the same, the second intermediate portion of the flange portion 17 of the bearing portion 10 shown in FIG. When the first projecting portion 17A is accommodated in the flange portion accommodating portion 75 by contacting the lower end 69A of the concave portion 69 of the second member 62 that is a constituent member of the object 42, the second intermediate 42 and the intermediate component 30 is positioned in the vertical direction and the front-rear direction with respect to the support bracket 8, and for this reason, the electric winding shaft 20 is placed between the pair of left and right support brackets 7, 8 by this positioning. It can be arranged at predetermined positions in the vertical direction and the front-rear direction, whereby a high level of horizontal accuracy of the winding shaft 20 can be ensured.

  In addition, the second intermediate member 42 of the present embodiment is provided with two upper and lower second members 62 with the up and down directions reversed, and these second members 62 have concave portions 69 having the same dimensions and the same shape. Since they are the same formed, the second intermediate member 42 that constitutes a part of the intermediate structural body 30 can be used upside down by these second members 62. ing.

  For this reason, there is no distinction between the upper and lower sides of the second intermediate 42. Therefore, when the second intermediate 42 is coupled to the bracket body 8A of the support bracket 8, this coupling operation is performed without worrying about the upper and lower sides. Easy to do.

  FIG. 21 shows a case where a bearing body 110 having a shape different from that of the bearing section 10 is provided on the bracket body 8A of the support bracket 8. The bearing portion 110 also includes a bearing portion main body 116 and a flange portion 117 protruding from the bracket main body 8A side of the bearing portion main body 116 in the outer diameter direction of the winding shaft. And the bearing part main body 16 has the bottom part 116A which curves and protrudes below, and the upright parts 116B and 116C which stood up from the both ends of the bottom part 16A, and has the shape opened upwards as a whole. Further, the flange portion 117 coupled to the bracket main body 8A protrudes in the horizontal direction or the substantially horizontal direction from the first protruding portion 117A protruding downward from the lower portion of the bearing portion main body 16 and both sides of the bearing portion main body 116. It consists of two 2nd protrusion parts 117B and 117C.

  The front-rear dimension L6 and the vertical dimension L8 of the first protrusion 117A of the bearing part 110 are different from the front-rear dimension L2 and the vertical dimension L4 of the first protrusion 17A of the bearing part 10 shown in FIG. The shapes of the protrusions 17A and 117A are different.

  FIG. 22 shows the second member 162 of the second intermediate 42 applied to the bearing portion 110 of FIG. Since the front-rear dimension L5 of the recess 169 formed in the second member 162 corresponds to the front-rear dimension L6 of the first protrusion 117A, the dimensions L5, L6 are the same. In addition, the vertical dimension L7 of the recess 169 is smaller than the vertical dimension L8 of the first protrusion 117A.

  According to this embodiment, when the bearing portion provided on the support bracket 8 is the bearing portion 10, the member 62 and the member 162 prepared as the second member constituting the second intermediate 42 are used. Of these, the member 62 may be selected and used, and when the bearing portion provided in the support bracket 8 is the bearing portion 110, the member 162 may be selected and used. In any case, since the second intermediate 42 can be manufactured using the first member 61 and the third member as a common member, it is possible to reduce the types of members that must be prepared and the manufacturing cost. Can be achieved.

  FIGS. 23 and 24 show another embodiment relating to passing the string-like member 35 shown in FIGS. 4, 7 and 8 through a hole 36 provided in the support bracket 7.

  In the embodiment of FIG. 23, a rubber or synthetic resin softer than the metal that is the material of the support bracket 7 is provided in the hole 36 provided to pass the string-like member 35 through the bracket body 7A of the metal support bracket 7. A short guide member 80 formed of a material such as the like is inserted, and the string-like member 35 is inserted into the inner hole of the guide member 80.

  According to this, even if the string-like member 35 is pulled as described above, the guide member 80 prevents the string-like member 35 from being rubbed and damaged by the hole 36 of the metal support bracket 7. Can do.

  In the embodiment of FIG. 24, the hole 36 provided for passing the string-like member 35 through the bracket body 7A of the metal support bracket 7 has a curved portion 81A that is curved in accordance with the wiring direction of the string-like member 35. A part of the long guide member 81 is inserted, and the guide member 81 is fixed to the bracket body 7A by a stopper 82.

  According to this embodiment, the string-like member 35 can be bent and wired in a predetermined direction by the bending guide action by the bending portion 81 </ b> A of the guide member 81.

  The guide member 81 may be formed of a material softer than metal, such as rubber or synthetic resin, like the guide member of FIG.

  The present invention can be used for various shutter devices including a window shutter device and a doorway shutter device in which at least a part of the shutter curtain is formed by connecting a plurality of slats.

DESCRIPTION OF SYMBOLS 3 Manual shutter curtain 6 Manual type winding shaft 7 Support bracket 9 Bearing part 18 Bearing part main body 18A Bottom part of bearing part main body 18B, 18C Standing upper part of bearing part main body 19 Flange part 20 Electric winding shaft 21 Opening and closing machine 21C Electric motor 21D Brake 25A End of electric winding shaft 31 Electric shutter curtain 35 String member 36 Hole 80, 81 Guide member 81A Bending portion 82 Stopper

Claims (1)

A manual winding shaft for winding and unwinding the shutter curtain, and an opening / closing device including an electric motor and a brake for braking the electric motor are housed therein, and the driving force of the electric motor The electric take-up shaft that is rotated by the motor is renovated, and a support bracket for supporting the manual take-up shaft, and an end of the manual take-up shaft are provided in the support bracket. In the refurbishment method to the electric shutter device that leaves the bearing part that is
Two supporting brackets are arranged on the left and right to support both ends of the manual winding shaft, and the bearings are disposed on each of the supporting brackets. A string-like member serving as a switching member for switching on and off the brake when rotation is stopped;
A hole for inserting the string-like member led out from the opening / closing machine into one of the left and right support brackets, and the string-like member to the one support bracket. It is formed in a place where it is not obstructed by the bearing portion provided, and a hole for inserting a power supply line for supplying electric power to the electric motor is formed in the other support bracket, and the power supply line is the other of the other A first work step that is formed at a location not disturbed by the bearing provided on the support bracket;
A second working step of inserting the string-like member into the hole formed in the one support bracket and inserting the power line into the hole formed in the other support bracket;
A method for refurbishing an electric shutter device, comprising:

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