Electric shutter

Abstract

To provide an electric shutter capable of improving the workability of meshing a drive gear to a rack gear.SOLUTION: The electric shutter includes: a baseboard positioned on the bottom of a shutter curtain; a motor provided to the baseboard; a guide rail into which the edges of the width direction of the shutter curtain are inserted; a rack gear placed along the guide rail meshed with a drive gear that is driven by the motor drive to rotate; a drive shaft provided to the baseboard to be driven by the motor to rotate; a driven shaft provided to the baseboard to which the drive gear is fixed; a connecting unit that connects the drive shaft and the driven shaft in a switchable manner between a transmission position where the rotational drive of the motor is transmitted between the drive shaft and the driven shaft and a release position where the transmission of the rotational drive is released; and a switching unit that switches the connecting unit between the transmission position and the release position.SELECTED DRAWING: Figure 4

Description

[Technical Field]

[0001] The present disclosure relates to a motorized shutter. [Background technology]

[0002] There is known an electric shutter in which a motor and a drive gear are attached to the baseboard located at the bottom of a spring-balanced shutter, and a rack gear is attached along a guide rail. Patent Document 1 discloses an electric shutter in which a drive gear attached to the output shaft of a motor meshes with a rack gear attached to a guide rail, and the shutter is driven electrically when the motor is driven. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 11-152974 Summary of the Invention [Problem to be solved by the invention]

[0004] When installing an electric shutter, the drive gear must be inserted from the top of the guide rail and meshed with the rack gear. The work of meshing the drive gear with the rack gear is performed for each left and right guide rail. Because the output shaft on which the drive gear is mounted is synchronized with the rotational drive of the motor, rotating the drive gear when the rotational drive of the motor is stopped places a heavy load on the shaft and is difficult to perform.

[0005] The present disclosure has been made in consideration of the above points, and aims to provide an electric shutter that can improve the workability of meshing a drive gear with a rack gear. [Means for solving the problem]

[0006] The first aspect of the present disclosure is a shutter curtain, comprising: a baseboard portion located at a lower portion of the shutter curtain; a motor provided at the baseboard portion; and a shutter curtain having a width direction. The shutter curtains are provided on both sides of the a guide rail into which the end of the The guide rails on both sides in the width direction are a rack gear provided in the baseboard portion and meshing with a drive gear that is rotationally driven by the drive of the motor; a drive shaft provided in the baseboard portion and rotating by the drive of the motor; a driven shaft provided in the baseboard portion and to which the drive gear is fixed; and a connecting portion that connects the drive shaft and the driven shaft in a manner that allows switching between a transmission position where the rotational drive of the motor is transmitted between the drive shaft and the driven shaft and a release position where the transmission of the rotational drive is released. Provided on the baseboard portion, a switching unit that switches the connecting unit between the transmission position and the release position; The drive shaft, the driven shaft, the connecting portion, and the switching portion are provided so as to be switchable between the transmission position and the release position for each rack gear. It is an electric shutter. [Brief explanation of the drawings]

[0007] [Figure 1] FIG. 1 is a diagram showing an embodiment of the present disclosure, and is a front view of an electric shutter. [Figure 2] This is a view of the baseboard with part of the cover removed from the inside of the room. [Figure 3] This is a view of the baseboard with the cover attached from the inside of the room. [Figure 4] FIG. 10 is an enlarged view of the connecting portion and the switching portion and their surroundings as seen from the indoor side. [Figure 5] 2 is a cross-sectional view taken along the line AA in FIG. 1. [Figure 6] FIG. 10 is a view showing the left end of the disassembled guide rail and baseboard portion. DETAILED DESCRIPTION OF THE INVENTION

[0008] An embodiment of an electric shutter according to the present disclosure will be described with reference to Figures 1 to 6. The following embodiment shows one aspect of the present disclosure, does not limit the disclosure, and can be modified as desired within the scope of the technical concept of the present disclosure. In the following drawings, the scale and number of components in each structure are different from the actual structure to make each component easier to understand.

[0009] As shown in Fig. 1, the electric shutter 1 includes a shutter curtain 4, guide rails 5A and 5B, and a shutter box 6. The electric shutter 1 opens and closes openings such as windows and doors in a building. Fig. 1 shows the electric shutter 1 with the lower side of the opening open and the upper side of the opening closed.

[0010] When the electric shutter 1 attached to the opening of a building is viewed from the indoor side, the direction that is up and down is referred to as the vertical direction, and the direction that is left and right is referred to as the width direction. The right side corresponds to one side in the width direction. The left side corresponds to the other side in the width direction. In the electric shutter 1, the direction perpendicular to the width direction and along the indoor / outdoor direction is referred to as the projection direction.

[0011] The shutter curtain 4 has a plurality of slats 4a and a baseboard portion 4b. Each of the plurality of slats 4a extends in the width direction. The plurality of slats 4a are connected in the vertical direction.

[0012] The shutter box 6 stores the shutter curtain 4. The shutter box 6 has a winding shaft and a balance spring, neither of which are shown. When the balance spring urges the shutter curtain 4 upward, it is wound around the winding shaft and stored inside the shutter box 6.

[0013] The baseboard portion 4b is located at the bottom of the shutter curtain 4. The baseboard portion 4b is connected to the lowest slat 4a. The baseboard portion 4b is a long member with a rectangular cross section. The baseboard portion 4b comes into contact with the fully open position abutment when the shutter curtain 4 is in the fully open state. The fully open position abutment is, for example, the shutter box 6, an upper frame of a frame body fixed to the opening of the building, or an abutment part installed at the upper end of the guide rails 5A and 5B. The baseboard portion 4b comes into contact with the fully closed position abutment when the shutter curtain 4 is in the fully closed state. The fully closed position abutment is, for example, the lower frame of the frame body, an abutment part installed at the lower end of the guide rails 5A and 5B, or the floor surface.

[0014] As shown in FIGS. 1 and 2, the baseboard portion 4b includes a solar panel 11, a battery 12, a control unit 13, a motor 14, a regulating device 15, a gearbox 16, a driven shaft 17, a drive gear 18, a drive shaft 20, a connecting unit 21, and a switching unit 22. The solar panel 11 is located on the outdoor side of the baseboard portion 4b in the forward direction. The battery 12, the control unit 13, the motor 14, the regulating device 15, the gearbox 16, the driven shaft 17, the drive gear 18, the drive shaft 20, the connecting unit 21, and the switching unit 22 are located on the indoor side of the baseboard portion 4b in the forward direction. As shown in FIG. 3, the motor 14, the gearbox 16, the drive shaft 20, and the connecting unit 21 are covered with a cover 14A. The cover 14A is not shown in FIG. 2.

[0015] The solar panel 11 generates electricity using the photoelectric effect. The solar panel 11 generates electricity when it receives sunlight. The electricity generated by the solar panel 11 is stored in the battery 12. The motor 14 rotates under the control of the control unit 13. The motor 14 rotates using the electricity stored in the battery 12 as its power source.

[0016] As shown in Figure 4, the drive shaft 20 protrudes from the gear box 16 on both sides in the width direction. The drive shaft 20 is a shaft body extending in the width direction. The drive shaft 20 is driven to rotate when the rotational drive of the motor 14 is transmitted via the gear box 16.

[0017] The driven shaft 17 is rotatably supported on the baseboard portion 4b. When coupled to the drive shaft 20, the driven shaft 17 is driven to rotate by the motor 14. The driven shaft 17 includes a first driven shaft 17A and a second driven shaft 17B. The first driven shaft 17A and the second driven shaft 17B are coaxial with the drive shaft 20. The first driven shaft 17A is disposed to the right of the gear box 16 and the drive shaft 20. The second driven shaft 17B is disposed to the left of the gear box 16 and the drive shaft 20.

[0018] The drive gear 18 is disposed at the end of the baseboard portion 4b in the width direction. The drive gear 18 includes a first drive gear 18A and a second drive gear 18B. The first drive gear 18A is fixed to the right end of the first driven shaft 17A. The first drive gear 18A is rotated in accordance with the rotation of the first driven shaft 17A. The second drive gear 18B is fixed to the left end of the second driven shaft 17B. The second drive gear 18B is rotated in accordance with the rotation of the second driven shaft 17B.

[0019] The connecting portion 21 can connect the drive shaft 20 and the driven shaft 17. The connecting portion 21 connects the drive shaft 20 and the driven shaft 17 in a manner switchable between a transmission position in which the rotational drive of the motor 14 is transmitted between the drive shaft 20 and the driven shaft 17 and a release position in which the transmission of the rotational drive of the motor 14 is released. The connecting portion 21 includes a first connecting portion 21A and a second connecting portion 21B. The first connecting portion 21A is disposed to the right of the gear box 16. The second connecting portion 21B is disposed to the left of the gear box 16.

[0020] The right end of the drive shaft 20 and the left end of the first driven shaft 17A are located at the first connecting portion 21A. The first connecting portion 21A connects the drive shaft 20 and the first driven shaft 17A in a manner switchable between a first transmission position, in which the rotational drive of the motor 14 is transmitted between the drive shaft 20 and the first driven shaft 17A, and a first release position, in which the transmission of the rotational drive of the motor 14 is released. In the first connecting portion 21A, the first release position is a position spaced to the left from the first transmission position.

[0021] The left end of the drive shaft 20 and the right end of the second driven shaft 17B are located at the second connecting portion 21B. The second connecting portion 21B connects the drive shaft 20 and the second driven shaft 17B in a manner switchable between a second transmission position, in which the rotational drive of the motor 14 is transmitted between the drive shaft 20 and the second driven shaft 17B, and a second release position, in which the transmission of the rotational drive of the motor 14 is released. The second release position of the second connecting portion 21B is located to the right of the second transmission position.

[0022] The drive shaft 20, through which the rotational drive of the motor 14 is transmitted, is connected to the first driven shaft 17A by, for example, a bevel gear, a clutch plate, etc. The drive shaft 20 and the first driven shaft 17A are disconnected from each other by, for example, moving the bevel gear, the clutch plate, etc. to the left. The drive shaft 20 and the second driven shaft 17B are connected to each other by, for example, a bevel gear, a clutch plate, etc. The drive shaft 20 and the second driven shaft 17B are disconnected from each other by, for example, moving the bevel gear, the clutch plate, etc. to the right.

[0023] The switching unit 22 switches the connecting unit 21 between a transmission position and a release position. The switching unit 22 includes a first switching unit 22A and a second switching unit 22B. The first switching unit 22A and the second switching unit 22B are each movable in the width direction. When the first switching unit 22A is located at position PA1, it positions the first connecting unit 21A at the first transmission position. When the first switching unit 22A is located at position PA2, it positions the first connecting unit 21A at the first release position. When the second switching unit 22B is located at position PB1, it positions the second connecting unit 21B at the second transmission position. When the second switching unit 22B is located at position PB2, it positions the second connecting unit 21B at the second release position.

[0024] When first switching unit 22A is operated to position PA1, the rotational drive of motor 14 is transmitted between drive shaft 20 and first driven shaft 17A. When the rotational drive of motor 14 is transmitted to first driven shaft 17A, first drive gear 18A is rotated. When first switching unit 22A is operated to switch from position PA1 to position PA2, the transmission of the rotational drive of motor 14 is released, and first driven shaft 17A and first drive gear 18A become rotatable independently of motor 14.

[0025] When second switching unit 22B is operated to position PB1, the rotational drive of motor 14 is transmitted between drive shaft 20 and second driven shaft 17B. When the rotational drive of motor 14 is transmitted to second driven shaft 17B, second drive gear 18B is rotated. When second switching unit 22B is operated to switch from position PB1 to position PB2, the transmission of the rotational drive of motor 14 is released, and second driven shaft 17B and second drive gear 18B become rotatable independently of motor 14.

[0026] Because the first transmission position and the first release position are spaced apart in the width direction, the first switching unit 22A can be moved in the axial direction of the first driven shaft 17A to switch between the first transmission position and the first release position. Because the second transmission position and the second release position are spaced apart in the width direction, the second switching unit 22B can be moved in the axial direction of the second driven shaft 17B to switch between the second transmission position and the second release position. Because the first driven shaft 17A and the second driven shaft 17B are each rotatably supported by the baseboard portion 4b, it is difficult to move them in a direction intersecting the axial direction to switch between the first transmission position and the first release position and between the second transmission position and the second release position. Because the first transmission position and the first release position are spaced apart in the width direction and the second transmission position and the second release position are spaced apart in the width direction, switching between the first transmission position and the first release position and between the second transmission position and the second release position is easy.

[0027] As shown in Fig. 3, the first switching unit 22A and the second switching unit 22B are provided so as to be exposed from the cover 14A. When the first switching unit 22A and the second switching unit 22B are provided so as to be exposed from the cover 14A, the switching operation between the first transmission position and the first release position and the switching operation between the second transmission position and the second release position can be easily performed. The first switching unit 22A and the second switching unit 22B are provided so as to be exposed on the indoor side. When the first switching unit 22A and the second switching unit 22B are provided so as to be exposed on the indoor side, outsiders cannot operate them when the shutter curtain 4 is fully closed, thereby improving security.

[0028] The regulating device 15 regulates the vertical position of the shutter curtain 4. The regulating device 15 is arranged at both widthwise ends of the baseboard portion 4b. The regulating device 15 has an upper limit switch 15A and a lower limit switch 15B. The upper limit switch 15A protrudes above the baseboard portion 4b. The upper limit switch 15A outputs an ON signal to the control unit 13 when an external force is applied. The ON signal from the upper limit switch 15A is output, for example, when the shutter curtain 4 rises and the upper limit switch 15A comes into contact with the shutter box 6. The control unit 13 stops driving the motor 14 when the ON signal is input from the upper limit switch 15A. When the driving of the motor 14 is stopped, the upper limit position of the shutter curtain 4 is regulated.

[0029] The lower limit switch 15B protrudes below the baseboard portion 4b. The lower limit switch 15B outputs an ON signal to the control unit 13 when an external force is applied to it. The ON signal from the lower limit switch 15B is output, for example, when the shutter curtain 4 is lowered and the lower limit switch 15B comes into contact with either the bottom frame or the floor. The control unit 13 stops driving the motor 14 when an ON signal is input from the lower limit switch 15B. When the driving of the motor 14 is stopped, the lower limit position of the shutter curtain 4 is restricted.

[0030] The control unit 13 controls the driving of the motor 14 when a signal is input from the upper limit switch 15A. The control unit 13 controls the driving of the motor 14 when a signal is input from the lower limit switch 15B. The control unit 13 controls the driving of the motor 14 when a signal is input from the remote control 2. The control unit 13 has a receiving unit 13A. The control unit 13 receives an operation signal output from the remote control 2 at the receiving unit 13A. The control unit 13 controls the driving, stopping of driving, and driving direction of the motor 14 according to the operation signal input from the remote control 2. When a stop signal is input during driving and the control unit 13 controls the motor 14, the shutter curtain 4 stops either rising or falling. The electric shutter 1 and the remote control 2 constitute an electric shutter system.

[0031] Guide rails 5A and 5B extend in the vertical direction. Guide rails 5A and 5B are arranged symmetrically with respect to the center of the shutter curtain 4 in the width direction, so the following description will focus on guide rail 5B.

[0032] As shown in Figure 5, the guide rail 5B is screwed to the shutter frame 9 using a set screw 9A. The guide rail 5B has guide walls 7 and 8. The guide walls 7 and 8 each extend in the vertical direction. The guide walls 7 and 8 are arranged opposite each other in the projection direction, separated by a holding space 10. The holding space 10 opens to the inside in the width direction and extends in the vertical direction. The holding space 10 passes through the guide rail 5B in the vertical direction. The holding space 10 opens at the upper and lower ends of the guide rail 5B.

[0033] As shown in FIG. 6 , an introduction portion 25B is provided at the upper end of the guide rail 5B. The introduction portion 25B has an inclined surface 27B and an inclined surface 28B. When the introduction portion 25B is attached to the upper end of the guide rail 5B, the inclined surface 27B is inclined in a direction toward the indoor side as it extends upward from the upper end of the guide wall 7. When the introduction portion 25B is attached to the upper end of the guide rail 5B, the inclined surface 28B is inclined in a direction toward the outdoor side as it extends upward from the upper end of the guide wall 8. The guide rail 5B may be configured without the introduction portion 25B. If the introduction portion 25B is not provided, it is preferable to provide an introduction portion such that the holding space 10 widens as it extends upward at the upper end of the guide rail 5B. The following description illustrates a configuration in which the introduction portion 25B is provided.

[0034] The widthwise end of the shutter curtain 4, the tip end of the second driven shaft 17B, and the second drive gear 18B are inserted into the holding space 10. The tip end of the second driven shaft 17B and the second drive gear 18B are inserted into the holding space 10 from the opening at the upper end of the guide rail 5B via the introduction portion 25B.

[0035] The guide wall 7 located on the indoor side has a rack gear 19. The rack gear 19 is disposed on the outdoor side of the guide wall 7 in the prospective direction facing the holding space 10. As shown in FIG. 1, the rack gear 19 is provided across the entire guide rail 5B in the vertical direction. The rack gear 19 meshes with the second drive gear 18B.

[0036] When installing the guide rail 5B during construction of the electric shutter 1, the shutter curtain 4 and baseboard portion 4b are pulled out from the shutter box 6. The first switching unit 22A is operated to position PA2, and the second switching unit 22B is operated to position PB2. The first connecting unit 21A and the second connecting unit 21B are placed in the release position, and the first drive gear 18A and the second drive gear 18B can rotate independently even when the drive of the motor 14 is stopped.

[0037] After the first drive gear 18A and the second drive gear 18B are rotatable, the left end of the baseboard portion 4b, the left end of the second driven shaft 17B, and the second drive gear 18B are inserted into the retaining space 10 of the guide rail 5B. When inserting the left end of the baseboard portion 4b, the left end of the second driven shaft 17B, and the second drive gear 18B into the retaining space 10, the introduction portion 25B provided at the upper end of the guide rail 5B is lifted from below, as shown in FIG. 6 . When the guide rail 5B and the introduction portion 25B are lifted from below, the left end of the baseboard portion 4b, the left end of the second driven shaft 17B, and the second drive gear 18B are guided by the inclined surfaces 27B and 28B of the introduction portion 25B and introduced into the retaining space 10 of the guide rail 5B. The guide rail 5B is fixed to the shutter frame 9.

[0038] When the second drive gear 18B reaches the holding space 10 of the guide rail 5B, it meshes with the rack gear 19 facing the holding space 10. When the guide rail 5B is fixed to the shutter frame 9, the second drive gear 18B meshes with the rack gear 19 at the vertical position it was in when it was pulled out of the shutter box 6. The second drive gear 18B can rotate independently even when the driving of the motor 14 is stopped, so the second drive gear 18B can mesh with the rack gear 19 without a large load being applied.

[0039] When the guide rail 5B is fixed to the shutter frame 9, the right end of the baseboard portion 4b, the right end of the first driven shaft 17A, and the first drive gear 18A are inserted into the holding space 10 of the guide rail 5A. When the right end of the baseboard portion 4b, the right end of the first driven shaft 17A, and the first drive gear 18A are inserted into the holding space 10 of the guide rail 5A, an introduction portion (not shown) provided at the upper end of the guide rail 5A is lifted from below. When the guide rail 5A and the introduction portion are lifted from below, the right end of the baseboard portion 4b, the right end of the first driven shaft 17A, and the first drive gear 18A are guided by the inclined surfaces of the introduction portion and introduced into the holding space 10 of the guide rail 5A. The guide rail 5A is fixed to the shutter frame 9.

[0040] When the first drive gear 18A reaches the holding space 10 of the guide rail 5A, it meshes with the rack gear 19 facing the holding space 10. When the guide rail 5A is fixed to the shutter frame 9, the first drive gear 18A meshes with the rack gear 19 at the vertical position it was in when it was pulled out from the shutter box 6. The first drive gear 18A can rotate independently even when the driving of the motor 14 is stopped, so the first drive gear 18A can mesh with the rack gear 19 without a large load being applied.

[0041] After inserting the baseboard portion 4b, first driven shaft 17A, and first drive gear 18A into the retaining space 10 of the guide rail 5A, the guide rail 5A is fixed to the shutter frame 9. Once the guide rails 5A and 5B are fixed to the shutter frame 9, the baseboard portion 4b is placed against either the fully open position abutment portion or the fully closed position abutment portion to make it horizontal. Once the baseboard portion 4b is horizontal, the first switch portion 22A is operated to position it at position PA1, and the second switch portion 22B is operated to position it at position PB1.

[0042] When the first switching unit 22A is positioned at position PA1, the first connecting unit 21A is in the first transmission position. When the first connecting unit 21A is in the first transmission position, the first drive gear 18A does not rotate because the drive of the motor 14 is stopped. Because the first drive gear 18A does not rotate, the vertical positions of the shutter curtain 4 and the baseboard 4b on the right side are maintained.

[0043] When the second switching unit 22B is positioned at position PB1, the second connecting unit 21B is in the second transmission position. When the second connecting unit 21B is in the second transmission position, the second drive gear 18B does not rotate because the drive of the motor 14 is stopped. Because the second drive gear 18B does not rotate, the vertical positions of the shutter curtain 4 and the baseboard 4b on the left side are maintained.

[0044] According to the electric shutter 1 of this embodiment, the connecting part 21 connects the drive shaft 20 and the driven shaft 17 so as to be switchable between a transmission position where the rotational drive of the motor 14 is transmitted between the drive shaft 20 and the driven shaft 17, and a release position where the transmission of the rotational drive of the motor 14 is released, and the switching part 22 is operated to switch the connection part 21 between the transmission position and the release position, so that the drive gear 18 can be engaged with the rack gear 19 without applying a large load when installing the guide rails 5A, 5B. When the electric shutter 1 is used, no large load is applied, which improves the workability of engaging the drive gear 18 with the rack gear 19.

[0045] In the electric shutter 1, a first connecting portion 21A connects the drive shaft 20 and the first driven shaft 17A so as to be switchable between a first transmission position in which the rotational drive of the motor 14 is transmitted between the drive shaft 20 and the first driven shaft 17A and a first release position in which the transmission of the rotational drive of the motor 14 is released. In the electric shutter 1, a second connecting portion 21B connects the drive shaft 20 and the second driven shaft 17B so as to be switchable between a second transmission position in which the rotational drive of the motor 14 is transmitted between the drive shaft 20 and the second driven shaft 17B and a second release position in which the transmission of the rotational drive of the motor 14 is released. The first switching unit 22A is operated to switch the first connecting unit 21A between a first transmission position and a first release position, and the second switching unit 22B is operated to switch the second connecting unit 21B between a second transmission position and a second release position, so that the first drive gear 18A and the second drive gear 18B can be selectively and independently meshed with the rack gear 19 without applying a large load when installing the guide rails 5A and 5B. When the electric shutter 1 is used, the efficiency of the meshing operation of the first drive gear 18A and the second drive gear 18B with the rack gear 19 can be further improved by arbitrarily selecting whether or not to rotate the first drive gear 18A and whether or not to rotate the second drive gear 18B depending on the application.

[0046] While preferred embodiments of the present disclosure have been described above with reference to the accompanying drawings, it goes without saying that the present disclosure is not limited to these examples. The shapes and combinations of the components shown in the above examples are merely examples, and various modifications can be made based on design requirements, etc., without departing from the spirit of the present disclosure.

[0047] In the above embodiment, the configuration in which the rack gear 19 is arranged on the guide wall 7 has been exemplified, but the present invention is not limited to this configuration. The rack gear 19 may be arranged on the guide wall 8. Even when the rack gear 19 is arranged on the guide wall 8, it is preferable from the viewpoint of crime prevention that the switching unit 22 including the first switching unit 22A and the second switching unit 22B be exposed to the indoor side.

[0048] In the above embodiment, the switching unit 22 includes the first switching unit 22A and the second switching unit 22B, but the present invention is not limited to this configuration. A single switching unit 22 may be configured to switch the first driven shaft 17A and the second driven shaft 17B collectively between the transmission position and the release position.

[0049] In the above embodiment, a configuration in which the switching unit 22 including the first switching unit 22A and the second switching unit 22B is operated by a person has been described as an example, but the present invention is not limited to this configuration. A configuration in which the transmission position and the release position are switched when the remote control 2 is operated may also be used. [Explanation of symbols]

[0050] 1...electric shutter, 4...shutter curtain, 4b...baseboard portion, 5A, 5B...guide rail, 7...guide wall, 15...regulating device, 17...driven shaft, 17A...first driven shaft, 17B...second driven shaft, 18...drive gear, 18A...first drive gear, 18B...second drive gear, 19...rack gear, 20...drive shaft, 21...connecting portion, 21A...first connecting portion, 21B...second connecting portion, 22...switching portion, 22A...first switching portion, 22B...second switching portion

Claims

1. The baseboard located at the bottom of the shutter curtain, a motor provided in the baseboard portion; guide rails provided on both sides of the shutter curtain in the width direction, into which the ends of the shutter curtain are inserted; rack gears provided on both sides of the guide rail in the width direction along the guide rail, the rack gears meshing with drive gears that are rotationally driven by the motor; a drive shaft provided on the baseboard portion and rotated by the motor; a driven shaft provided in the baseboard portion and to which the drive gear is fixed; a coupling portion provided on the baseboard portion, which couples the drive shaft and the driven shaft in a manner switchable between a transmission position where the rotational drive of the motor is transmitted between the drive shaft and the driven shaft and a release position where the transmission of the rotational drive is released; a switching unit provided on the baseboard portion and configured to switch the connecting portion between the transmission position and the release position; Equipped with The drive shaft, the driven shaft, the connecting portion, and the switching portion are provided so as to be switchable between the transmission position and the release position for each rack gear.

2. The drive gear is a first drive gear disposed on one side in the width direction; a second drive gear disposed on the other side in the width direction; Including, The driven shaft is a first driven shaft disposed on one side in the width direction and having the first drive gear fixed thereto; a second driven shaft disposed on the other side in the width direction and having the second drive gear fixed thereto; Including, The connecting portion is a first coupling portion that couples the drive shaft and the first driven shaft in a manner switchable between a first transmission position in which the rotational drive of the motor is transmitted between the drive shaft and the first driven shaft and a first release position in which the transmission of the rotational drive is released; a second coupling portion that couples the drive shaft and the second driven shaft in a manner switchable between a second transmission position in which the rotational drive of the motor is transmitted between the drive shaft and the second driven shaft and a second release position in which the transmission of the rotational drive is released; Including, The switching unit is a first switching unit that switches the first connecting unit between the first transmitting position and the first releasing position; a second switching unit that switches the second connecting unit between the second transmitting position and the second releasing position; The motorized shutter of claim 1 , comprising:

3. The switching portion is provided in an exposed state.

3. The electric shutter according to claim 1 or 2.

4. The switching unit is exposed to the indoor side. The electric shutter according to claim 3 .

5. the transmission position and the release position are spaced apart in the width direction; The electric shutter according to any one of claims 1 to 4.

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