JP2020018765A - Clutch unit and solar shading device - Google Patents

Abstract

To provide a solar shading device that is superior in convenience.SOLUTION: A clutch unit 60 includes: a first gear 61 rotatable on an input shaft inputted from a drive unit; at least one second gear 62 engaged with the first gear 61; a drum 64 for accommodating the first gear 61 and the second gear 62, being concentric with the input shaft and rotatable, and outputting the input from the drive unit to a rotation axis of a movement mechanism; a gear supporting part 69 provided in the drum 64, supporting the second gear 62 in a turning manner, and rotatable concentrically to the first gear 61 and the drum 64; an inner wall 65 provided outward and at a position having no interference with the second gear 62 in the radial direction of the first gear 61 and the second gear 62 in the drum 64; and a projection 63 being provided in the second gear 62 and projecting outward in the radial direction.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a clutch unit and a solar shading device.

  As an example of the solar shading device, there is a device generally called a curtain rail. As the curtain rail, a rail that movably supports a runner that attaches a curtain as a solar shading material, a transfer mechanism including a belt and a pulley that moves the runner on the rail, and a driving unit that drives the transfer mechanism Are known (for example, see Patent Document 1).

  The solar shading device disclosed in Patent Document 1 relates to a driving method of a driving unit that drives a transfer mechanism, in which a manual operation code (operating member) is provided to manually rotate a driving shaft, and a power supply code is provided to a driving shaft. Can be switched to an electric type in which the motor is rotated electrically. In a conventional curtain rail, when a manual drive unit is used, a manual operation code of the drive unit is manually operated, so that a transfer mechanism operates and a runner moves on the curtain rail to open and close the curtain.

Japanese Patent No. 6100909

  By the way, in a conventional curtain rail, there is a case where the curtain is opened and closed without operating the driving unit when the user holds the curtain by hand.

  However, in the conventional curtain rail, a force transmission path is directly connected between the runner and the drive unit. For this reason, in the conventional curtain rail, when the user opens and closes the curtain by hand, force is transmitted from the runner to which the curtain is attached to the drive unit via the transfer mechanism. That is, in the conventional curtain rail, when the curtain is opened and closed by hand, the force is also transmitted to the drive unit, so that the force applied to the curtain by the user is large.

  Further, in the conventional curtain rail, when the curtain is opened and closed by hand, an operation member provided in the driving unit moves in conjunction with the curtain, and thus noise is generated from the driving unit. Further, in the conventional curtain rail, since the operating member is linked to the curtain as described above, it is necessary to keep the operating member operable, for example, a state in which the operating member hangs down from the driving unit. Therefore, in the conventional curtain rail, it was difficult for the user to store or fix the operation member according to the situation.

  The present invention has been made in view of the above points, and an object of the present invention is to provide a solar radiation shielding device that is excellent in convenience.

  In order to achieve the above object, a clutch unit according to the present invention includes a moving mechanism that moves a runner on a rail that movably supports a runner to which a solar radiation shielding material is attached, and a driving mechanism that drives a rotating shaft of the moving mechanism. A first gear provided between the moving mechanism and the drive unit, the first gear being rotatable about an input shaft input from the drive unit, and at least one second gear meshing with the first gear. And a housing that houses the first gear and the second gear and is rotatable concentrically with the input shaft, and outputs an input from the drive unit to the rotation shaft of the moving mechanism. A gear supporting portion movably supported and rotatable concentrically with the first gear and the housing; and a housing provided at a position radially outward of the first gear and the second gear and not interfering with the second gear in the housing. An inner wall which is provided on the second gear, and a protruding portion that protrudes outward in the radial direction.

  In the clutch unit according to one aspect of the present invention, the protruding portion protrudes radially outward from the tooth tip of the second gear, and the inner wall is provided at a position not in contact with the tooth tip of the second gear. You may.

  In the clutch unit according to one aspect of the present invention, the protrusion may be provided at a position where the second gear rotates by a predetermined angle from a state in which the second gear meshes with the first gear and contacts the inner wall of the housing. Good.

  In the clutch unit according to one aspect of the present invention, the protrusion may be formed so as to exert an elastic force on the inner wall.

  In the clutch unit according to one aspect of the present invention, the housing may include a shaft portion provided concentrically with the rotation shaft of the moving mechanism.

  In the clutch unit according to one aspect of the present invention, the force input to the input shaft of the first gear from the driving unit is output to the rotation shaft of the moving mechanism by rotating the housing by pressing the inner wall by the protrusion. The force input to the housing from the moving mechanism may block the transmission to the drive unit by rotating the housing and sliding the inner wall and the protrusion.

  In order to achieve the above object, a solar shading device according to the present invention drives a rail that movably supports a runner to which a solar shading member is attached, a moving mechanism that moves the runner on the rail, and a moving mechanism. It has a drive part and a clutch unit provided between the movement mechanism and the drive part, and the clutch unit is the clutch unit described above.

  ADVANTAGE OF THE INVENTION According to this invention, the solar shading apparatus excellent in convenience can be provided.

It is a front view showing roughly composition of a solar shading device concerning an embodiment of the invention. It is a perspective view which shows roughly the structure of the solar shading apparatus shown in FIG. It is sectional drawing which shows schematically the structure of the solar shading apparatus shown in FIG. It is a sectional view showing roughly composition of a clutch unit concerning an embodiment of the invention. FIG. 5 is an exploded perspective view schematically showing a configuration of the clutch unit shown in FIG. 4. FIG. 5 is a plan view schematically showing a configuration of the clutch unit shown in FIG. 4, showing a state in which a protrusion is not in contact with an inner wall of the drum. FIG. 5 is a plan view schematically illustrating a configuration of the clutch unit illustrated in FIG. 4, illustrating a state in which a protrusion presses an inner wall of the drum. FIG. 8 is a partially enlarged view of the protrusion and its surroundings in a state where the protrusion of the clutch unit shown in FIG. 7 is pressing the inner wall of the drum. FIG. 5 is a plan view schematically showing a configuration of the clutch unit shown in FIG. 4, showing a state in which a protruding portion slides on an inner wall of the drum. FIG. 10 is a partially enlarged view of the protrusion and its periphery in a state where the protrusion of the clutch unit shown in FIG. 9 is sliding on the inner wall of the drum. It is a perspective view for showing the 2nd gear of a modification in the clutch unit shown in Drawing 4.

  Hereinafter, a solar shading device according to an embodiment of the present invention and a clutch unit provided in the solar shading device will be described with reference to the drawings. In the following description, the solar shading device according to the present embodiment is attached near the upper edge of a window frame (not shown). The solar shading device according to the present embodiment will be described as a device that opens and closes a curtain, which is an example of a solar shading material, that is, a curtain rail.

[Insolation shielding device]
A solar shading device according to one embodiment of the present invention will be described.
FIG. 1 is a front view schematically showing a configuration of a solar shading apparatus 10 according to an embodiment of the present invention. FIG. 2 is a perspective view schematically showing a configuration of solar radiation shielding apparatus 10 according to the embodiment of the present invention.

  As shown in FIGS. 1 and 2, the solar shading device 10 includes a rail 30 that movably supports a runner 31 to which the curtain 20 is attached, a moving mechanism 40 that moves the runner 31 on the rail 30, and a moving mechanism. And a drive unit 50 that drives the drive unit 40. In addition, the solar shading device 10 includes a clutch unit 60 provided between the moving mechanism 40 and the driving unit 50. Hereinafter, the configuration of the solar shading device 10 will be specifically described.

  In the following description, the longitudinal direction (lateral direction, width direction) of the rail 30 of the solar shading device 10 in FIGS. 1 and 2 is the X-axis direction, and the direction perpendicular to the X-axis (the depth direction) is Y. The short direction (longitudinal direction, height direction) of the rail 30 orthogonal to the axial direction and the X axis is defined as the Z axis direction.

  The curtain 20 is generally processed so that the runner 31 and the suspending tool 32 can be attached to cloth or the like cut to a predetermined size sufficient to cover a window frame (not shown). In the present invention, the material, the number, and the dimensions of the curtain 20 are not limited.

  The rail 30 includes a runner 31 and a suspending tool 32. In the rail 30, the runners 31 are provided corresponding to the number of curtains 20. The runner 31 is movably supported on the rail 30. The runner 31 is attached to the left end (one end) of the curtain 20 as viewed in FIG. A large number of the suspenders 32 are movably supported on the rail 30 between the runner 31 and the tip of the rail 30. In the present embodiment, the number of the suspenders 32 is not limited. The curtain 20 is suspended and supported on the rail 30 by a runner 31 and a suspending tool 32.

  The moving mechanism 40 is attached to the right end (the other end) of the solar shading device 10 in FIG.

  FIG. 3 is a cross-sectional view schematically illustrating the configuration of the solar shading device 10. As illustrated in FIG. 3, the moving mechanism 40 includes an endless belt 41 that moves inside the rail 30, a first pulley 42 on which the belt 41 is hung, and a moving mechanism 40 including the belt 41 and the first pulley 42. And a cover 43 for housing the components. In addition, in order to enable the transmission of the driving force from the driving unit 50, the moving mechanism 40 causes the rotation shaft 44 of the first pulley 42 to move downward (−Z-axis direction) outward on the lower side of the cover 43. It is exposed.

  The transfer mechanism is not limited as long as the transfer mechanism can move the runner 31 on the rail 30. As the transmission means of the moving mechanism 40, for example, a roller chain or the like may be used.

  The drive unit 50 is provided below the moving mechanism 40 and to the right of the clutch unit 60. As shown in FIG. 3, the driving unit 50 includes a ball chain 51, a case 52, and a second pulley 53. The drive unit 50 has a transmission mechanism 54 provided inside a case 52.

  The ball chain 51 is an endless member. The ball chain 51 is an example of a user operation member, and receives a user's force. The ball chain 51 is wound around a second pulley 53 provided on the driving unit 50. The second pulley 53 is provided on a rotation shaft of the transmission mechanism 54. The second pulley 53 has an uneven shape corresponding to the shape of the ball chain 51 so that the ball chain 51 can be wound around. The transmission mechanism 54 transmits the rotational force of the second pulley 53 rotated by the ball chain 51 to the moving mechanism 40 via the clutch unit 60 as the driving force of the runner 31. That is, when the user operates the ball chain 51, the drive unit 50 moves the runner 31 in a direction corresponding to the operation. The transmission mechanism 54 desirably has a function of increasing the torque by reducing the rotational force of the second pulley 53 rotated by the ball chain 51, such as a planetary gear mechanism.

  In the solar shading device 10, the configuration of the driving unit 50 is not limited to the above-described example.

  The clutch unit 60 is provided between the moving mechanism 40 and the drive unit 50 in the solar shading device 10. The configuration and operation of the clutch unit 60 will be described later.

  The solar shading apparatus 10 includes the rail 30, the moving mechanism 40, and the driving unit 50 described above, so that the curtain 20 is expanded along the rail 30 (closed state) and the curtain 20 is folded (open state). ).

[Clutch unit]
Next, the clutch unit 60 provided in the solar shading device 10 according to one embodiment of the present invention will be described.

  As described above, the clutch unit 60 is provided between the moving mechanism 40 and the driving unit 50 in the solar shading device 10.

  FIG. 4 is a cross-sectional view schematically showing a configuration of clutch unit 60 according to the embodiment of the present invention. FIG. 5 is an exploded perspective view schematically showing the configuration of the clutch unit 60.

  As shown in FIGS. 4 and 5, the clutch unit 60 includes a first gear 61 rotatable around an input shaft input from the drive unit 50, and at least one second gear 62 that meshes with the first gear 61. , Is provided. The clutch unit 60 houses a first gear 61 and a second gear 62, is rotatable concentrically with an input shaft, and has a drum 64 as a housing that outputs an input from a driving unit to a rotation shaft of a moving mechanism. , Is provided. The clutch unit 60 is provided on the drum 64, and includes a gear supporting portion 69 rotatably supporting the second gear 62 and rotating concentrically with the first gear 61 and the drum 64. In addition, the clutch unit 60 includes an inner wall 65 provided on the drum 64 at a position radially outward of the first gear 61 and the second gear 62 and at a position that does not interfere with the second gear 62. Further, the clutch unit 60 includes a protruding portion 63 provided on the second gear 62 and protruding outward in the radial direction. The clutch unit 60 includes a housing 66, a bevel gear mechanism 67, and a bearing 68 in addition to the above components. Hereinafter, the configuration of the clutch unit 60 will be specifically described.

  The first gear 61 is housed inside the drum 64. The first gear 61 includes a first gear main body 611 and a first gear shaft 612. The first gear main body 611 is provided concentrically with the first gear shaft 612. The first gear body 611 is, for example, a spur gear having external teeth. The first gear shaft 612 is exposed from below the drum 64 to the outside. The first gear shaft 612 functions as an input shaft that receives an input from the drive unit 50 via the bevel gear mechanism 67.

  The second gear 62 is arranged around the first gear 61. The second gear 62 is configured to rotate together with the first gear 61. The second gear 62 includes a second gear body 621, a second gear shaft 622, and a protrusion 63. The second gear body 621 is a spur gear having external teeth that meshes with the first gear body 611. The second gear shaft 622 is provided concentrically with the second gear main body 621. The second gear 62 is rotatable in the gear support 69 because the second gear shaft 622 is supported by the gear support 69. In the present embodiment, three second gears 62 are arranged around the first gear 61. However, in the present invention, the number of the second gears may be at least one or more.

  The protrusion 63 is provided on the second gear 62. The protrusion 63 may be formed integrally with the second gear 62, for example. The protrusion 63 is provided so as to protrude beyond the second gear body 621 in the radial direction of the second gear body 621. The protrusion 63 has, for example, a radius of rotation about the second gear shaft 622 larger than the addendum circle of the second gear main body 621. The protruding portion 63 is provided at a predetermined distance, for example, at a position apart from the second gear main body 621 in which the teeth are arranged, in a direction in which the rotation axis extends, so as not to interfere with the tooth width of the second gear main body 621. .

  The drum 64 includes a drum body 641 that covers the first gear 61 and the second gear 62 from the outside in the radial direction, a drum cover 642 that covers the first gear 61 and the second gear 62 from the upper side in the axial direction, and a moving mechanism 40. The shaft portion 643 is provided concentrically with the rotating shaft 44 and is rotatable with the rotating shaft 44.

  The drum main body 641 is a flat, substantially cylindrical housing whose dimension in the radial direction (Z-axis direction) is larger than that in the height direction (Y-axis direction). The upper end surface of the drum body 641 is open. The drum main body 641 is provided with a shaft hole 644 on the lower side for allowing the first gear shaft 612 to penetrate outside in order to connect the first gear shaft 612 of the first gear 61 to the bevel gear mechanism 67. ing.

  The drum lid 642 is provided so as to cover the open upper end surface of the drum main body 641. The shaft portion 643 described above is provided on the drum lid portion 642. When the drum cover 642 is fixed to the drum main body 641, the drum 64 becomes rotatable about the shaft 643 by integrating the drum main body 641, the drum cover 642, and the shaft 643 together.

  The shaft portion 643 is provided at the center of the upper surface of the drum cover 642 facing the moving mechanism 40. The shaft 643 is connected to the rotation shaft 44. The shaft portion 643 is concentric with the rotation shaft 44 of the moving mechanism 40, for example. When the shaft 643 is connected to the rotating shaft 44, the drum 64 rotates together with the moving mechanism 40 and outputs an input from the driving unit 50 to the moving mechanism 40. The shaft portion 643 is provided concentrically with the first gear shaft portion 612 of the first gear 61.

  Note that the drum 64 may not have the shaft portion 643 as long as it can output an input from the driving unit 50 to the moving mechanism 40. For example, the drum 64 may directly drive the first pulley 42 of the moving mechanism 40. Further, the drum 64 may also serve as the first pulley 42 of the moving mechanism 40. Further, the shaft portion 643 of the drum 64 is not limited to the shaft portion 643 provided concentrically with the first gear shaft portion 612 of the first gear 61 as described above.

  The housing 66 has a space provided therein so as to accommodate the components of the clutch unit 60. The housing 66 may be formed by being divided into a plurality of portions at an arbitrary position, and combining these portions during assembly.

  The bevel gear mechanism 67 includes a first bevel gear 671 and a second bevel gear 672. The first bevel gear 671 is provided concentrically with the rotation shaft of the drive unit 50. The second bevel gear 672 is connected to the first gear shaft 612 of the first gear 61 exposed from below the drum cover 642. The bevel gear mechanism 67 changes the direction of the rotation axis of the drive unit 50 by 90 degrees in accordance with the rotation direction of the first gear shaft 612 of the clutch unit 60.

  The clutch unit and the solar shading device provided with the clutch unit of the present invention are not limited to those having the bevel gear mechanism. The clutch unit may be connected so that the output shaft of the drive unit and the first gear shaft unit can be directly transmitted.

  The bearing 68 is provided inside the drum cover 642. The bearing 68 is provided to rotatably support the first gear shaft 612 with respect to the drum cover 642.

  The gear support 69 is provided inside the drum cover 642. The gear support 69 includes an upper gear support 691 and a lower gear support 692. The upper gear support 691 is a disk-shaped member that supports upper ends of the first gear shaft 612 and the second gear shaft 622. The upper gear support 691 is provided with holes for supporting upper ends of the first gear shaft 612 and the second gear shaft 622. The lower gear support 692 is a member that penetrates the first gear shaft 612 and supports the lower end of the second gear shaft 622. The lower gear support 692 is provided with a column 693 for supporting the upper gear support 691.

[Arrangement of protrusions]
Next, the arrangement of the protruding portions 63 inside the drum 64 of the clutch unit 60 will be described.

  FIG. 6 is a plan view schematically showing a configuration of the clutch unit 60, and is a view showing a state in which the protrusion 63 is not in contact with the inner wall 65 of the drum 64. As shown in FIG. 6, the drum 64 includes a first gear main body 611 of the first gear 61 and a second gear 62 so that the first gear 61 and the second gear 62 housed inside the drum main body 641 can rotate. The inner wall 65 is arranged at a position where the tooth tip of each of the second gear main bodies 621 of the second gear 62 does not contact.

  In the area A where the protruding portion 63 is provided, the second gear 62 can rotate with the first gear 61 by a predetermined angle from the state where the second gear 62 is engaged with the first gear 61 shown in FIG. It is set to be able to. Specifically, in the area A where the protrusion 63 is provided, when the second gear 62 is engaged with the first gear 61 as shown in FIG. This is a region different from the region that meshes with 61 and the region that faces the inner wall 65.

[Operation of projecting part when moving mechanism is operated by input from drive unit]
Next, the operation of the protrusion 63 when the moving mechanism 40 is operated by an input from the drive unit 50 will be described.

  As shown in FIG. 3, when the user pulls the ball chain 51 and rotates the second pulley 53 to input a rotational force, the driving unit 50 is decelerated by the planetary gear mechanism of the transmission mechanism 54 to increase the torque. Output. As shown in FIGS. 4 and 5, the rotational force output from the drive unit 50 is rotated by 90 degrees by the bevel gear mechanism 67 and the first rotation of the clutch unit 60 connected to the bevel gear mechanism 67 is performed. It is input to the gear 61. When the first gear 61 is rotated by an input from the bevel gear mechanism 67, the rotational force is transmitted to the second gear 62.

  FIG. 7 is a plan view schematically showing the configuration of the clutch unit 60, and is a view showing a state in which the protrusion 63 presses the inner wall 65 of the drum 64. FIG. 8 is a partially enlarged view of the protrusion 63 and its surroundings in a state where the protrusion 63 of the clutch unit 60 presses the inner wall 65 of the housing.

  As shown in FIGS. 7 and 8, in the clutch unit 60, when a rotational force is input from the first gear 61 rotating in the rotation direction R1 to the second gear 62, the second gear 62 rotates in the rotation direction R2. When the second gear 62 rotates in the rotation direction R <b> 2, the protrusion 63 provided on the second gear 62 comes into contact with the inner wall 65 of the drum 64. The rotation force input to the first gear 61 is transmitted to the drum 64 via the second gear 62 when the protrusion 63 contacts the inner wall 65. The clutch unit 60 transmits the force input to the first gear 61 to the drum 64, so that the first gear 61 and the drum 64 rotate integrally in the rotation direction R1.

  In the clutch unit 60, the shaft 643 of the drum cover 642 is connected to the rotation shaft 44 of the moving mechanism 40 and the first pulley 42. Therefore, in the clutch unit 60, when the first gear 61 and the drum 64 rotate integrally as described above, the belt 41 wound around the first pulley 42 is driven. In the moving mechanism 40, when the belt 41 is driven, the runner 31 moves along the rail 30.

  Therefore, according to the solar shading device 10, the user can operate the ball chain 51 of the driving unit 50 to open and close the curtain 20.

[Operation of protrusion when input from moving mechanism]
Next, the operation of the protrusion 63 in the clutch unit 60 when input from the moving mechanism 40, that is, when the user directly holds and opens and closes the curtain 20 without operating the drive unit 50 explain.

  When the user operates the curtain 20 shown in FIG. 1 by hand, the runner 31 moves on the rail 30. When the runner 31 moves on the rail 30, the belt 41 of the moving mechanism 40 shown in FIG. 4 is driven. When the belt 41 is driven, the first pulley 42 around which the belt 41 is wound rotates. The rotational force of the first pulley 42 is input to the shaft 643 provided on the drum lid 642 of the clutch unit 60 via the rotary shaft 44.

  FIG. 9 is a plan view schematically showing the configuration of the clutch unit 60, showing a state in which the protrusion 63 is sliding on the inner wall 65 of the drum 64 by an input from the moving mechanism 40. FIG. 10 is a partially enlarged view of the protrusion 63 and its surroundings in a state where the protrusion 63 is sliding on the inner wall 65 of the drum 64 by an input from the moving mechanism 40.

  As shown in FIGS. 9 and 10, the inner wall 65 of the drum 64 slides on the protruding portion 63 even when the drum 64 rotates in the rotation direction R3 due to the rotational force input from the rotary shaft 44 to the shaft portion 643. Move. Therefore, in the clutch unit 60, the rotational force of the drum 64 is not transmitted to the lower gear support 692, and the clutch unit 60 blocks the driving force from the curtain 20 without being transmitted to the driving unit 50.

  Therefore, according to the solar shading apparatus 10 including the clutch unit 60, when the curtain 20 is directly opened and closed, the ball chain 51 of the driving unit 50 does not move.

  Since the solar shading device 10 includes the clutch unit 60 described above, the transmission path of the driving force is not directly connected between the runner 31 and the driving unit 50. For this reason, according to the solar shading apparatus 10, by providing the clutch unit 60, even if the user manually opens and closes the curtain 20, no power is transmitted from the runner 31 to the driving unit 50 via the moving mechanism 40. . That is, according to the solar shading apparatus 10, the provision of the clutch unit 60 can reduce the force applied to the curtain 20 when the curtain 20 is manually opened and closed.

  In addition, according to the solar shading device 10, by providing the clutch unit 60, the ball chain 51 does not move even when the curtain 20 is opened and closed by hand, and noise from the driving unit 50 can be suppressed.

  Furthermore, according to the solar shading device 10 including the clutch unit 60, since the ball chain 51 does not interlock with the curtain 20, the user stores or fixes the ball chain 51 according to the situation, for example, when the ball chain 51 is not used. be able to.

  Therefore, according to the clutch unit 60, the solar shading device 10 excellent in convenience can be provided.

[Modification of Second Gear]
Next, a modified example of the second gear in the clutch unit 60 included in the solar shading device 10 described above will be described.

  FIG. 11 is a perspective view showing a second gear 62A of a modified example in the clutch unit according to the embodiment of the present invention. As shown in FIG. 11, the second gear 62A has a protrusion 63A different from the above-described second gear 62. Specifically, the protruding portion 63A is formed with a thin portion 632A below the contact surface 630A that contacts the inner wall 65 from the distal end portion 631A toward the root portion.

  The projecting portion 63A can exert an elastic force on the inner wall 65 when it comes into contact with the inner wall 65 by the thin portion 632A. When the protrusion 63A exerts an elastic force on the inner wall 65, the force of the second gear 62A that causes the protrusion 63A in contact with the drum 64 to move away from the drum 64 increases. Thus, according to the second gear 62A, when the user directly operates the curtain 20, the force input from the curtain 20 to the clutch unit 60 can be more reliably cut off.

  The structure for exerting the elastic force on the inner wall 65 of the drum 64 is not limited to the above-described example. For example, by providing a spring member between the protrusion and the inner wall, the protrusion is You may make it separate from the inner wall 65 positively.

  Although the embodiment of the present invention has been described above, the present invention is not limited to the solar shading device and the clutch unit of the solar shading device according to the embodiment of the present invention. And all the aspects included in the range. For example, in the solar shading device 10, the driving unit 50 is a so-called manual type driven by a user operating the ball chain 51, but may be an electric driving unit in the present invention. In addition, the components may be appropriately selectively combined so as to achieve at least a part of the above-described problems and effects. For example, the shape, material, arrangement, size, and the like of each configuration in the above embodiment can be appropriately changed depending on the specific usage of the present invention.

DESCRIPTION OF SYMBOLS 10 ... Solar shading apparatus, 20 ... Curtain, 30 ... Rail, 31 ... Runner, 32 ... Hanging tool, 40 ... Moving mechanism, 41 ... Belt, 42 ... 1st pulley, 43 ... Cover, 44 ... Rotating shaft, 50 ... Drive unit, 51: ball chain, 52: case, 53: second pulley, 54: transmission mechanism, 60: clutch unit, 61: first gear, 62: second gear, 63: projecting part, 64: drum, 65 ... inner wall, 66 ... housing part, 67 ... bevel gear mechanism, 68 ... bearing, 69 ... gear support part, 611 ... first gear body part, 612 ... first gear shaft part, 621 ... second gear body part, 622 ... Second gear shaft portion, 630A contact surface, 631A tip end, 632A thin portion, 641 drum body, 642 drum cover portion, 643 shaft portion, 644 shaft hole, 691 upper gear support portion, 692 ... lower teeth Support portion, 693 ... posts

Claims (7)

In a solar shading device comprising: a moving mechanism that moves the runner on a rail that movably supports a runner to which the solar shading material is attached; and a driving unit that drives a rotation axis of the moving mechanism. A clutch unit provided between the drive unit and
The clutch unit includes:
A first gear rotatable around an input shaft input from the drive unit;
At least one second gear meshing with the first gear;
A housing that houses the first gear and the second gear, is rotatable concentrically with the input shaft, and outputs an input from the driving unit to a rotation shaft of the moving mechanism;
A gear supporting portion provided on the housing, rotatably supporting the second gear, and rotatable concentrically with the first gear and the housing;
An inner wall provided in the housing at a position radially outward of the first gear and the second gear and at a position not interfering with the second gear;
A protrusion provided on the second gear and protruding outward in the radial direction;
Comprising,
Clutch unit. The protruding portion protrudes outward in the radial direction from the tooth tip of the second gear,
The inner wall is provided at a position that does not contact the tooth tip of the second gear.
The clutch unit according to claim 1. The protrusion is provided at a position where the second gear rotates by a predetermined angle from a state in which the second gear meshes with the first gear and contacts the inner wall of the housing.
The clutch unit according to claim 1. The protrusion is formed to exert an elastic force on the inner wall,
The clutch unit according to claim 1. The housing has a shaft portion provided concentrically with a rotation shaft of the moving mechanism,
The clutch unit according to claim 1. The force input from the drive unit to the input shaft of the first gear is output to the rotation shaft of the moving mechanism by rotating the housing by the protrusion pressing the inner wall,
The force input to the housing from the moving mechanism, the transmission to the drive unit is cut off by rotating the housing and sliding the inner wall and the protrusion,
The clutch unit according to claim 1. A rail movably supporting a runner to attach the solar shading material,
A moving mechanism for moving the runner on the rail,
A drive unit for driving the moving mechanism;
A clutch unit provided between the moving mechanism and the drive unit;
A solar shading device comprising:
The clutch unit is the clutch unit according to any one of claims 1 to 6,
Solar shading device.

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