Electric shutter

Abstract

To provide an electric shutter capable of stably driving a shutter curtain.SOLUTION: The electric shutter includes: a baseboard part located on the bottom of a shutter curtain; a motor provided to the baseboard part; a drive gear provided to the baseboard part, which is driven to rotate by the drive of the motor; a guide rail into which an edge of the shutter curtain in the width direction and the drive gear are inserted; a rack gear that is provided along the guide rail and meshes with the drive gear; and a biasing device that biases the drive gear toward the rack gear.SELECTED DRAWING: Figure 5

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] If there is an error in the installation of the guide rail, gear jumping may occur between the drive gear and the rack gear when the shutter curtain is opened or closed, making it impossible to drive the shutter curtain stably.

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

[0006] A 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 in the baseboard portion, a drive gear provided in the baseboard portion and driven to rotate by the drive of the motor, a guide rail into which an end portion of the shutter curtain in the width direction and the drive gear are inserted, a rack gear provided along the guide rail and meshing with the drive gear, and a rack gear disposed movably along the guide rail and engaging with the baseboard portion. See and a biasing device that biases the drive gear toward the rack gear by biasing the drive gear in a retracting direction. [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 from inside the room. [Figure 3] 2 is a cross-sectional view taken along the line AA in FIG. 1. [Figure 4] FIG. [Figure 5] 5 is a cross-sectional view of FIG. 4 taken along line B-B. 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 5. 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 up and down direction, and the direction that is left and right is referred to as the width direction. The up and down direction corresponds to the first direction. The left and right direction corresponds to the second direction. In the electric shutter 1, the direction that is perpendicular to the width direction and runs along the indoor / outdoor direction is called the look-through direction. The outdoor side in the look-through direction corresponds to one side of the look-through direction. The indoor side in the look-through direction corresponds to the other side of the look-through 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] 1 and 2, the baseboard portion 4b has a solar panel 11, a battery 12, a control unit 13, a motor 14, a regulating device 15, a gearbox 16, a drive shaft 17, a drive gear 18, and an urging device 20 shown in Fig. 3. 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 drive shaft 17, the drive gear 18, and the urging device 20 are located on the indoor side of the baseboard portion 4b in the forward direction.

[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 is driven to rotate using the electricity stored in the battery 12 as power. The drive shafts 17 are disposed on the right and left sides of the gear box 16. The drive shafts 17 are shafts extending in the width direction. The drive shafts 17 are driven to rotate when the rotational drive of the motor 14 is transmitted via the gear box 16. The drive gears 18 are fixed to the axial ends of the drive shafts 17. The drive gears 18 are disposed at the widthwise ends of the baseboard portion 4b. The drive gears 18 are driven to rotate in conjunction with the rotational drive of the drive shafts 17.

[0016] 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.

[0017] 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.

[0018] 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. The shutter curtain 4 stops either rising or falling when a signal is input and the control unit 13 controls the motor 14. The electric shutter 1 and the remote control 2 constitute an electric shutter system. The actuation device 20 will be described later.

[0019] 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 and have the same configuration, so the following description will focus on guide rail 5B.

[0020] As shown in FIG. 3, 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 facing each other in the forward direction, separated by a holding space 10. The holding space 10 opens on the inside in the width direction and extends in the vertical direction. The holding space 10 penetrates the guide rail 5B in the vertical direction. The holding space 10 opens at the upper and lower ends of the guide rail 5B. The widthwise ends of the shutter curtain 4, the tip end of the drive shaft 17, and the drive gear 18 are inserted into the holding space 10. For example, the tip end of the drive shaft 17 and the drive gear 18 are inserted into the holding space 10 from an opening at the upper end of the guide rail 5B.

[0021] 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 direction facing the holding space 10. As shown in FIG. 1, the rack gear 19 is provided over the entire guide rail 5B in the vertical direction. The rack gear 19 meshes with the drive gear 18.

[0022] The biasing device 20 is fixed to the regulating device 15 from the indoor side using a setscrew 15C. The biasing device 20 biases the drive gear 18 toward the rack gear 19. As shown in FIG. 4 , the biasing device 20 has a housing 21, a roller 23, a central shaft 24, a support portion 25, and a spring 26.

[0023] The housing 21 is positioned further indoors in the front-view direction than the guide wall 7. The housing 21 has a bottom wall 21a and side walls 21b. The bottom wall 21a is rectangular plate-shaped. The side walls 21b are rectangular tubular extending from the edge of the bottom wall 21a toward the outside. The housing 21 has a storage space 21c surrounded by the bottom wall 21a and the side walls 21b. When viewed in the front-view direction, the storage space 21c is cross-shaped, extending in the vertical and width directions and intersecting each other. The storage space 21c opens to the outside. The side wall 21b located on the right side has a fixed wall 21d. Two fixed walls 21d are arranged spaced apart in the vertical direction. The fixed walls 21d protrude to the right from the side wall 21b. Each of the fixed walls 21d has a through-hole 21e penetrating in the front-view direction. The housing 21 is fixed by screwing the fixed wall 21d to the restriction device 15 from the indoor side using a setscrew 15C inserted into the through hole 21e from the indoor side.

[0024] As shown in Fig. 5, the side walls 21b that face each other in the width direction have an engagement hole 21f. In Figs. 4 and 5, only the engagement hole 21f provided in the right side wall 21b is shown, and the engagement hole 21f provided in the left side wall 21b is not shown. The engagement hole 21f penetrates the side wall 21b in the width direction. The engagement holes 21f are provided above and below the center of the side wall 21b in the up-down direction. The housing 21 has four engagement holes 21f in the side wall 21b.

[0025] The bottom wall 21a has protrusions 21g that protrude into the storage space 21c toward the outdoors. The protrusions 21g are provided on the right and left sides of the center of the width of the bottom wall 21a. The protrusions 21g are inserted into the spring 26 from the indoor side. The protrusions 21g position and support the spring 26 in the radial direction.

[0026] The housing 21 has a lid portion 22. The lid portion 22 has a top wall 22a and claw portions 22b. The top wall 22a is a rectangular plate when viewed in the front direction. When viewed in the front direction, the outer contour of the top wall 22a is the same as the outer contour of the side wall 21b. The top wall 22a is arranged at the outdoor end of the side wall 21b. The top wall 22a closes the storage space 21c from the outdoor side. The top wall 22a has a through hole 22c that penetrates in the front direction. The through hole 22c is rectangular and extends vertically when viewed in the front direction.

[0027] The claw portions 22b protrude from the top wall 22a toward the indoor side. A total of four claw portions 22b are provided at intervals in the width direction and the up-down direction. The width direction and up-down direction positions of the claw portions 22b are the same as the width direction and up-down direction positions of the engagement holes 21f. Each claw portion 22b is inserted into the engagement hole 21f from the inside in the width direction. The claw portion 22b inserted into the engagement hole 21f engages from the indoor side with the engagement surface 21h facing the engagement hole 21f in the side wall 21b. The lid portion 22 is positioned in the width direction and up-down direction when the claw portions 22b are inserted into the engagement holes 21f. The lid portion 22 is positioned in the projection direction when the claw portions 22b engage with the engagement surface 21h.

[0028] The central shaft 24 is cylindrical and extends in the width direction. The roller 23 corresponds to the contact member. The roller 23 is disk-shaped and has the central shaft 24 as its center. The roller 23 is rotatable around the central shaft 24. The roller 23 is stored in a region of the storage space 21c that extends in the vertical direction. The central shaft 24 is stored in a region of the storage space 21c that extends in the width direction. As shown in FIG. 5, a portion of the outdoor side of the roller 23 stored in the storage space 21c can protrude from the housing 21 to the outdoor side through the through-hole 22c. The portion of the roller 23 that protrudes from the housing 21 to the outdoor side can contact the guide wall 7 from the indoor side.

[0029] The support portions 25 are arranged on both sides of the roller 23 in the width direction. The support portions 25 are cubic in shape. The support portions 25 have insertion holes 25a and protrusions 25b. The insertion holes 25a penetrate the support portions 25 in the width direction. An end of the central shaft 24 is inserted into the insertion holes 25a. The protrusions 25b are inserted into the interior of the spring 26 from the outside. The protrusions 25b position and support the spring 26 in the radial direction. The support portions 25, together with the central shaft 24, are stored in a region of the storage space 21c that extends in the width direction.

[0030] The spring 26 corresponds to the biasing member. The spring 26 is a coil spring extending in the forward direction. The indoor end of the spring 26 is supported by the protrusion 21g and contacts the outdoor surface of the bottom wall 21a. The outdoor end of the spring 26 is supported by the protrusion 25b and contacts the indoor surface of the support portion 25. The spring 26 is stored in a region extending in the width direction of the storage space 21c in a compressed state and contacts the bottom wall 21a and the support portion 25. The spring 26 stored in the compressed state inside the housing 21 biases the roller 23 toward the outdoor side via the support portion 25 and the central shaft 24 due to the action of an elastic restoring force. The spring 26 stored in the compressed state inside the housing 21 biases the housing 21 toward the indoor side via the bottom wall 21a due to the action of an elastic restoring force.

[0031] As shown in Figure 5, in the biasing device 20 in which the fixed wall 21d is fixed to the baseboard portion 4b via the regulating device 15, when the spring 26 biases the roller 23 toward the outdoors via the support portion 25 and the central shaft 24, the outer peripheral surface of the roller 23 contacts the guide wall 7 from the indoor side. Because the guide wall 7 is fixed to the shutter frame 9, the roller 23 contacts the guide wall 7 with a biasing force toward the outdoors. When the roller 23 contacts the guide wall 7 with a biasing force toward the outdoors, the position of the roller 23 in the prospective direction is fixed. When the position of the roller 23 in the prospective direction is fixed, the relative positional relationship in the prospective direction between the roller 23, the guide wall 7, and the rack gear 19 remains constant.

[0032] When the position of the roller 23 in the forward direction is fixed, the spring 26 urges the baseboard portion 4b toward the interior of the room via the bottom wall 21a, the fixed wall 21d, and the regulating device 15. When the baseboard portion 4b is urged toward the interior of the room, the drive shaft 17 and the drive gear 18 are urged toward the interior of the room. When the baseboard portion 4b is urged toward the interior of the room, the drive shaft 17 and the drive gear 18 are urged toward the rack gear 19.

[0033] When the roller 23 is biased to contact the guide wall 7 and the drive gear 18 is biased toward the rack gear 19, and the shutter curtain 4 and baseboard portion 4b either rise or fall, the roller 23 rotates around the central axis 24.

[0034] According to the electric shutter 1 of this embodiment, the biasing device 20 biases the drive gear 18 toward the rack gear 19, so when an installation error or the like occurs in the guide rails 5A, 5B, it is possible to prevent gear jumping between the drive gear 18 and the rack gear 19 when opening or closing the shutter curtain 4. When the electric shutter 1 is used, the shutter curtain 4 can be driven stably.

[0035] The stroke by which roller 23 moves in the forward direction is set taking into consideration the deflection of baseboard portion 4b that occurs when resisting wind pressure. As shown in Figure 3, L1 is the distance in the forward direction from when drive gear 18 and rack gear 19 are meshed until baseboard portion 4b comes into contact with guide wall 8. L2 is the distance by which spring 26 elastically deforms and bends from when drive gear 18 and rack gear 19 are meshed, allowing housing 21 to move relative to roller 23 toward the outdoors in the forward direction. Distance L2 is set to a value greater than distance L1.

[0036] For example, if a large negative pressure occurs on the outdoor side of the electric shutter 1, the baseboard 4b and the housing 21 will move toward the outdoor side. Because distance L2 is greater than distance L1, the spring 26 in the housing 21 will be in an elastically deformed state when the baseboard 4b contacts the guide wall 8. When the spring 26 in the housing 21 is in an elastically deformed state, no large load exceeding the biasing force from the spring 26 will be applied to the support part 25, central shaft 24, and roller 23. If a large negative pressure occurs on the outdoor side of the electric shutter 1, the baseboard 4b will be the first to receive the load, which will prevent stress from being applied to the biasing device 20.

[0037] When the electric shutter 1 is used, the outer circumferential surface of the roller 23 comes into contact with the guide wall 7 when the shutter curtain 4 and baseboard 4b are either raised or lowered, so the roller 23 rotates around the central axis 24. When the roller 23 rotates while the shutter curtain 4 and baseboard 4b move relative to the roller 23, resistance is reduced, allowing the shutter curtain 4 to be driven more stably.

[0038] 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.

[0039] In the above embodiment, the rack gear 19 is disposed on the guide wall 7, but the present invention is not limited to this configuration. The rack gear 19 may be disposed on the guide wall 8. When the rack gear 19 is disposed on the guide wall 8, the biasing device 20 only needs to bias the drive gear 18 toward the outside.

[0040] In the above embodiment, the roller 23 is used as the contact member in contact with the guide wall 7, but the present invention is not limited to this configuration. The contact member may be a non-rotating member. When the contact member is a non-rotating member, it is preferable to select a material that has low friction resistance between the contact member and the guide wall 7.

[0041] In the above embodiment, a configuration in which the spring 26 is used as the biasing member has been exemplified, but the present invention is not limited to this configuration. A configuration in which an elastic member such as a leaf spring, a disc spring, or rubber is used as the biasing member may also be used. A configuration in which a gas such as air is filled as the biasing member inside the housing 21 to airtightly seal the housing 21, and the pressure of the gas is used to bias the contact member and the drive gear 18. A configuration in which a liquid such as oil is filled as the biasing member inside the housing 21 to liquidtightly seal the housing 21, and the pressure of the liquid is used to bias the contact member and the drive gear 18.

[0042] In the above embodiment, the configuration in which the urging device 20 is fixed to the baseboard portion 4b via the regulating device 15 is exemplified, but the configuration is not limited to this. Either a configuration in which the urging device 20 is fixed to the baseboard portion 4b via a member different from the regulating device 15 or a configuration in which the urging device 20 is directly fixed to the baseboard portion 4b may be used. [Explanation of symbols]

[0043] 1...electric shutter, 4...shutter curtain, 4b...baseboard portion, 5A, 5B...guide rail, 7...guide wall, 15...regulating device, 18...drive gear, 19...rack gear, 20...urging device, 21...casing, 23...roller, 24...center shaft, 26...spring

Claims

1. The baseboard located at the bottom of the shutter curtain, a motor provided in the baseboard portion; a drive gear provided on the baseboard portion and driven to rotate by the motor; a guide rail into which the end of the shutter curtain in the width direction and the drive gear are inserted; a rack gear provided along the guide rail and meshing with the drive gear; a biasing device that is movably disposed along the guide rail and biases the baseboard portion in a projection direction to bias the drive gear toward the rack gear; Equipped with an electric shutter.

2. the rack gear and the drive gear are disposed on one side of the guide wall of the guide rail in a projection direction, The biasing device is disposed on the other side of the guide wall in the projection direction. The electric shutter according to claim 1 .

3. The biasing device is a housing fixed to the baseboard portion and disposed away from the guide wall on the other side of the projection direction; a contact member provided inside the housing, a portion of which protrudes from the housing toward one side in the projection direction and is capable of contacting the guide wall; a biasing member that is provided inside the housing on the other side of the contact member in the projection direction, biasing the contact member toward one side of the projection direction to bring it into contact with the guide wall and biasing the housing toward the other side of the projection direction; having The electric shutter according to claim 2 .

4. the contact member is a roller that is rotatable about a central axis extending in the width direction, The roller has an outer circumferential surface that contacts the guide wall when biased by the biasing member. The electric shutter according to claim 3 .

5. The biasing member is a spring extending in the projection direction.

5. The electric shutter according to claim 3 or 4.

6. The baseboard portion has a regulating device at an end in the width direction that regulates the vertical position of the shutter curtain, The biasing device is fixed to the restricting device. The electric shutter according to any one of claims 3 to 5.

Images