JP7281982B2 - Solar shading device - Google Patents

Description

The present invention relates to a solar shading device.

2. Description of the Related Art As a solar radiation shielding device, there is known a blind that raises and lowers a solar radiation shielding material (slat) by vertically operating a single operation cord (see, for example, Patent Document 1).

JP 2016-196754 A

By the way, the operation of the blind includes an operation of moving the slat up and down, as well as a tilting operation of rotating the slat to change the direction of the slat. In the blind, it is expected to improve operability by facilitating the raising and lowering operation and the tilting operation of the slat by means of the operating member.

However, Patent Document 1 discloses a structure that includes an operation rod and raises and lowers the blind with a single cord, but does not disclose a specific structure for tilting the slats.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a solar radiation shielding device with excellent operability.

In order to achieve the above object, a solar radiation shielding device according to the present invention comprises: a shielding member; an elevating cord for elevating the shielding member; a head box for supporting the shielding member via the elevating cord; a lifting shaft rotatably supported inside; a winding drum that rotates by the lifting shaft to wind the lifting cord and raise and lower the shielding member; and an operation to rotate the lifting shaft by pulling out the operation cord. A solar radiation shielding device comprising: a unit, wherein the operation unit includes a reel drum having a rotating shaft for winding the operation cord; and selectively switching between a transmission state in which the rotational force of the reel drum is transmitted to the lifting shaft and a non-transmission state in which transmission is not performed, and the blocking member restricts rotation of the lifting shaft in a direction in which it descends due to its own weight. a clutch unit, a one-way clutch provided between the reel drum and the clutch unit for transmitting the rotation of the reel drum only to the clutch unit; It has a tilt shaft for changing the orientation of the shielding member by relatively moving a ladder cord attached to the shielding member up and down, and an input unit attached to the operation cord for inputting a rotational force. a rotation transmission unit that transmits to the tilt shaft to rotate the tilt shaft.

The solar radiation shielding device according to an aspect of the present invention includes a ladder drum provided on the same axis as the winding drum and transmitting the rotational force from the rotation transmission section to the tilt shaft.

In the solar radiation shielding device according to one aspect of the present invention, the ladder drum has an elevating shaft insertion hole through which the elevating shaft is rotatably inserted between the clutch unit and the winding drum.

In the solar radiation shielding device according to an aspect of the present invention, the rotation transmission section has a gear member that transmits the rotation force input from the input section to the tilt shaft.

In the solar radiation shielding device according to one aspect of the present invention, the tilt shaft is parallel to the elevation shaft and provided at a position separated from the elevation shaft.

ADVANTAGE OF THE INVENTION According to this invention, the solar radiation shielding apparatus excellent in operability can be provided.

BRIEF DESCRIPTION OF THE DRAWINGS It is a front view which shows roughly the structure of the solar radiation shielding apparatus which concerns on embodiment of this invention. FIG. 2 is a perspective view schematically showing the configuration of an operation unit of the solar radiation shielding device shown in FIG. 1; FIG. 3 is a partially exploded perspective view schematically showing the configuration of the operation unit shown in FIG. 2; FIG. 3 is an exploded perspective view schematically showing the configuration of the operation unit shown in FIG. 2; FIG. 3 is a perspective view schematically showing the configuration of a reel drum of the operation unit shown in FIG. 2; FIG. 3 is a perspective view schematically showing the configuration of a reel shaft of the operation unit shown in FIG. 2; FIG. 7 is a perspective view schematically showing the structure of the reel shaft shown in FIG. 6; 3 is a perspective view schematically showing the configuration of a second bevel gear of the operation unit shown in FIG. 2; FIG. FIG. 3 is a perspective view schematically showing the configuration of a first spur gear of the operation unit shown in FIG. 2; 3 is a perspective view showing an assembled state of a reel shaft, a second bevel gear, and a first spur gear of the operating unit shown in FIG. 2; FIG. FIG. 3 is a front view schematically showing the configuration of the operation unit shown in FIG. 2; FIG. 3 is a side view schematically showing the configuration of the operation unit shown in FIG. 2; FIG. 3 is a cross-sectional view of the operation unit shown in FIG. 2 taken along the line AA; FIG. 3 is a cross-sectional view of the operation unit shown in FIG. 2 taken along the line BB. 3 is an enlarged cross-sectional view of the operation unit shown in FIG. 2 taken along line AA; FIG. FIG. 3 is a cross-sectional view of the operation unit shown in FIG. 2 taken along line DD; FIG. 2 is a perspective view schematically showing the configuration of a winding drum unit of the solar radiation shielding device shown in FIG. 1; FIG. 18 is an exploded perspective view schematically showing the configuration of the winding drum unit shown in FIG. 17; FIG. 18 is a cross-sectional view of the winding drum unit shown in FIG. 17; FIG. 2 is a perspective view schematically showing the configuration of a clutch unit of the solar radiation shielding device shown in FIG. 1; FIG. 21 is a cross-sectional view schematically showing the configuration of the clutch unit shown in FIG. 20; FIG. 21 is an exploded perspective view schematically showing the configuration of the clutch unit shown in FIG. 20; FIG. 21 is a view showing the main part of the clutch unit shown in FIG. 20, (a) is a perspective view of the cam drum, (b) is a perspective view showing the disassembled state of the cam drum, the clutch spring cylinder, and the clutch spring; c) is a front view of the cam drum viewed from the base end side in the axial direction. 21A and 21B are development views of the cam drum of the clutch unit shown in FIG. 21A and 21B are diagrams illustrating the operation of the cam drum of the clutch unit shown in FIG. FIG. 2 is a perspective view schematically showing a configuration of an operation pole portion of the solar radiation shielding device shown in FIG. 1; FIG. 27 is an exploded perspective view schematically showing the configuration of the operation pole section shown in FIG. 26; FIG. 27 is a cross-sectional view schematically showing the configuration of the operation pole portion shown in FIG. 26 when not operated; FIG. 27 is an enlarged cross-sectional view schematically showing the configuration of the operation pole portion shown in FIG. 26 when not operated; FIG. 27 is a cross-sectional view schematically showing the configuration of the operation pole portion shown in FIG. 26 during operation; FIG. 27 is a cross-sectional view schematically showing the configuration of the operation pole portion shown in FIG. 26 during the downward operation;

A solar radiation shielding device 1 according to an embodiment of the present invention will be described below with reference to the drawings. In the following description, the solar radiation shielding device 1 according to this embodiment is attached near the upper edge of a window frame (not shown). Also, the solar radiation shielding device 1 according to the present embodiment will be described as a blind that opens and closes a slat, which is an example of a shielding member.

[Schematic configuration of solar radiation shielding device]
A solar radiation shielding device 1 according to one embodiment of the present invention will be described.
FIG. 1 is a front view schematically showing the configuration of a solar radiation shielding device 1 according to an embodiment of the invention. FIG. 2 is a perspective view schematically showing the construction of the operation unit 70 of the solar radiation shielding device 1. As shown in FIG. FIG. 3 is a partially exploded perspective view schematically showing the configuration of the operating unit 70 of the solar radiation shielding device 1. As shown in FIG. FIG. 4 is an exploded perspective view schematically showing the configuration of the operation unit 70. As shown in FIG.

As shown in FIGS. 1 to 4, the solar radiation shielding device 1 includes a shielding member 10, an elevating cord 20 for elevating the shielding member 10, a head box 30 for supporting the shielding member 10 via the elevating cord 20, a head A lifting shaft 40 rotatably supported in the box 30, a winding drum unit 50 that rotates by the lifting shaft 40 to wind up the lifting cord 20 and raise and lower the shielding member 10, and the lifting shaft by pulling out the operation cord 60. and an operation unit 70 for rotating 40 . The operation unit 70 includes a reel drum 71 that winds the operation cord 60 and a reel spring 705 as an urging member that urges the operation cord 60 in a winding direction on the reel drum 71 . The solar radiation shielding device 1 selectively switches between a transmission state in which the rotational force of the reel drum 71 is transmitted to the elevation shaft 40 and a non-transmission state in which the rotation force is not transmitted. 40 and a clutch unit 73 that regulates the rotation. The solar radiation shielding device 1 is provided between the reel drum 71 and the clutch unit 73, and is rotatably supported within the head box 30 and the one-way clutch 74 that transmits the rotation of the reel drum 71 only to the clutch unit 73. and a tilt shaft 76 for opening and closing the shielding member 10 by vertically moving a ladder cord 75 attached to the shielding member 10 according to rotation. Further, the solar radiation shielding device 1 has an input gear 771 as an input portion into which the operation cord 60 is inserted and a rotational force is input, and a rotation transmission portion that transmits the rotational force to the tilt shaft 76 to rotate the tilt shaft 76. 77 and.

The solar radiation shielding device 1 is provided on the axis A that is the same axis as the winding drum 51 of the winding drum unit 50, and includes a first tilt gear 54 to which the rotational force from the rotation transmission section 77 is transmitted through the tilt shaft 76, and a ladder. A second tilt gear 55 is provided as a drum.

Here, the second tilt gear 55 has an elevating shaft insertion hole 551 through which the elevating shaft 40 is rotatably inserted between the clutch unit 73 and the winding drum 51 .

The rotation transmission section 77 has a first bevel gear 772, a second bevel gear 773, a first spur gear 774, and a second spur gear 775 as gear members for transmitting the rotational force input from the input gear 771 to the tilt shaft 76. ing.

The tilt shaft 76 is parallel to the elevation shaft 40 and provided at a position separated from the elevation shaft 40 . The configuration of the solar radiation shielding device 1 will be specifically described below.

In the following description, the longitudinal direction (horizontal direction, width direction) of the shielding member 10 and the head box 30 of the solar radiation shielding device 1 in FIG. is defined as the Y-axis direction, and the stacking direction (longitudinal direction and height direction) of the plurality of shielding members 10 perpendicular to the X-axis is defined as the Z-axis direction.

As an example, the shielding member 10 is composed of a plurality of slats 11 in the solar radiation shielding device 1 and a bottom rail 12 provided in the lower layer of the lowermost slat 11 . The slats 11 and bottom rails 12 are supported by lifting cords 20 and ladder cords 75 . The slat 11 and the bottom rail 12 are lifted and lowered in the Z-axis direction by winding up or unwinding the lifting cord 20 . Also, the slat 11 rotates as the ladder cord 75 tilts.

[Operation unit]
Next, the operation unit 70 included in the solar radiation shielding device 1 will be described.

FIG. 5 is a perspective view schematically showing the construction of the reel drum 71 of the operation unit 70. As shown in FIG. FIG. 6 is a perspective view schematically showing the structure of the reel shaft 770 of the operation unit 70. As shown in FIG. FIG. 7 is a perspective view schematically showing the configuration of reel shaft 770. As shown in FIG. FIG. 8 is a perspective view schematically showing the configuration of the second bevel gear 773 of the operation unit 70. As shown in FIG. FIG. 9 is a perspective view schematically showing the configuration of the first spur gear 774 of the operation unit 70. As shown in FIG. FIG. 10 is a perspective view showing how the reel shaft 770, second bevel gear 773, and first spur gear 774 of the operation unit 70 are assembled. FIG. 11 is a front view schematically showing the configuration of the operation unit 70. As shown in FIG. FIG. 12 is a side view schematically showing the configuration of the operation unit 70. As shown in FIG. FIG. 13 is a cross-sectional view of the operation unit 70 taken along line AA. FIG. 14 is a BB cross-sectional view of the operation unit 70. As shown in FIG.

As shown in FIGS. 2 to 4, the operating unit 70 includes a first case 701, a second case 702, a rotation transmitting portion 77, a reel drum 71, a reel drum cover 72, a one-way clutch 74, and a drum cap 741. The rotation transmission unit 77 transmits the rotation of the reel shaft 770 and a rod-shaped input unit (to be described later) through which the operation cord 60 is inserted. and a gear member for transmitting to: The rotation transmission section 77 has an input gear 771, a first bevel gear 772, a second bevel gear 773, a first spur gear 774, and a second spur gear 775 as the gear members described above.

As shown in FIGS. 3 and 4, the first case 701 and the second case 702 contain therein the reel spring 705 and the constituent elements of the rotation transmission section 77, that is, the reel shaft 770, the tip of the input gear 771, and the second case 702. A first bevel gear 772, a second bevel gear 773, a first spur gear 774 and a second spur gear 775 are housed. The first case 701 and the second case 702 are fitted together and fixed by a snap ring 703 and a snap ring 706 to form a housing that accommodates the above-described components of the rotation transmission section 77 .

As shown in FIGS. 6 and 7, the reel shaft 770 is a shaft-like member. The reel shaft 770 has a split-like slit portion 7701 extending from one end toward the other end in the longitudinal direction, and a boss portion 7702 formed at one end in a convex shape in the circumferential direction. In addition, the reel shaft 770 has a cross-shaped protrusion 7703 formed in a cross shape in the circumferential direction at the other end, and a round protrusion 7704 protruding in the longitudinal direction at the other end.

The input gear 771 is provided with a bevel gear 7711 that can be fitted with the first bevel gear 772 at one end, and a pole connection portion 7712 that can be connected to a universal joint of an operation pole portion, which will be described later, at the other end. is a member of The input gear 771 is arranged so that one end side where the bevel gear 7711 is provided is perpendicular to the longitudinal direction of the operation unit 70 . The input gear 771 is accommodated in the first case 701 and the second case 702 at one end side where the bevel gear 7711 is provided. The other end of the input gear 771 where the pole connecting portion 7712 is provided is exposed to the outside from the first case 701 and the second case 702 . The input gear 771 transmits the rotational force input from the pole connecting portion 7712 to the first bevel gear 772 . The input gear 771 allows the operation cord 60 to pass through a cord passage hole 7713 provided in the longitudinal direction.

The first bevel gear 772 is provided inside the first case 701 and the second case 702 . The first bevel gear 772 is formed to mesh with the input gear 771 and the second bevel gear 773 . That is, the first bevel gear 772 transmits the rotational force of the input gear 771 to the second bevel gear 773 .

As shown in FIGS. 2 to 4, the second bevel gear 773 is provided inside the first case 701 and the second case 702 . As shown in FIG. 8 , the second bevel gear 773 is formed such that the second bevel gear body 7731 meshes with the first bevel gear 772 . In addition, the second bevel gear 773 has, at one end in the direction of the axis A, a fitting portion 7732 that can be fitted with a fitting portion of the first spur gear 774 described later. Further, the second bevel gear 773 has a through hole 7733 along the axis A direction at the center of the axis. The second bevel gear 773 transmits the rotational force of the input gear 771 via the first bevel gear 772 to the first spur gear 774 .

As shown in FIGS. 2 to 4 , the first spur gear 774 is formed such that the first spur gear body 7741 meshes with the second spur gear 775 . As shown in FIG. 9 , the first spur gear 774 has a fitting portion 7742 that can be fitted with the fitting portion 7732 of the second bevel gear 773 at one end in the axis A direction. Further, the first spur gear 774 has a through hole 7743 along the axis A direction at the center of the axis. The first spur gear 774 transmits the rotational force of the input gear 771 to the second spur gear 775 via the first bevel gear 772 and the second bevel gear 773 .

As shown in FIG. 10 , in the operation unit 70 , the fitting portion 7732 of the second bevel gear 773 and the fitting portion 7742 of the first spur gear 774 are fitted to each other so that the second bevel gear 773 and the first spur gear 774 are engaged. are rotatable together. Also, in the operation unit 70 , the reel shaft 770 is provided with a clearance with respect to the through hole 7733 of the second bevel gear 773 and the through hole 7743 of the first spur gear 774 . Therefore, the reel shaft 770 can rotate without interfering with both the second bevel gear 773 and the first spur gear 774 .

The second spur gear 775 is provided above the first spur gear 774 inside the first case 701 and the second case 702 as shown in FIGS. 1 meshes with the spur gear main body 7741; The second spur gear 775 is provided with a tilt shaft fitting portion 7751 that can be fitted with the tilt shaft 76 shown in FIG. 1 at the center of rotation.

As shown in FIG. 5, the reel drum 71 is a cylindrical member. The reel drum 71 has a cross-shaped recess 711 and a recessed hole 712 in the center of the cross-shaped recess 711 on one side surface.

As shown in FIGS. 11 and 13, in the operation unit 70, the reel drum 71 is operated through the cord passage hole 7713 provided in the input gear 771, the first case 701 and the second case 702 from the operation pole portion. Cord 60 is wound up. The reel drum 71 is formed in a tapered shape whose diameter decreases from the input gear 771 side toward the one-way clutch 74 side (-X axis direction). Further, the reel drum 71 is provided with a reel drum cover 72 so as to surround the outer peripheral portion of the end on the rotation transmitting portion 77 (+X-axis direction) side in the longitudinal direction.

The reel drum cover 72 has an inner peripheral portion 721 facing the outer peripheral portion on the side of the rotation transmitting portion 77 in the longitudinal direction of the reel drum 71, and the other end side of the reel drum 71, that is, the end portion on the one-way clutch 74 side in the longitudinal direction. and a cord guide portion 722 provided. The inner peripheral portion 721 forms a surface inclined in the feed direction of the operation cord 60 between the reel drum 71 whose outer peripheral surface is tapered in the -X-axis direction. The cord guide portion 722 is a concave portion provided with a clearance of one or more and less than two thicknesses of the operation cord 60 in the radial direction of the inner peripheral portion 721 of the reel drum cover 72 .

The drum cap 741 is provided on the other end side in the longitudinal direction of the reel drum 71 (−X axis direction, clutch unit 73 side). The drum cap 741 has a one-way clutch accommodating portion 7411 that accommodates the one-way clutch 74 and a fitting protrusion 7412 that fits into the fitting recess 713 of the reel drum 71 . The drum cap 741 can rotate integrally with the reel drum 71 by fitting the fitting projection 7412 into the fitting recess 713 of the reel drum 71 .

The one-way clutch 74 transmits only the rotation of the reel drum 71 in the pull-out direction (R1 direction shown in FIG. 16) of the operation cord 60 to the lifting shaft 40 via the clutch unit 73 . The one-way clutch 74 is rotatable integrally with the reel drum 71 by press-fitting the one-way clutch 74 into the one-way clutch accommodating portion 7411 of the drum cap 741 .

As shown in FIGS. 4 and 14, the reel spring 705 is formed by spirally winding a plate-like elastic member such as metal. The reel spring 705 is provided at the end of the head box 30 on the side where the operation unit 70 is provided. One end portion 7051 of the reel spring 705 is engaged with a first gap portion 7011 and a second gap portion 7021 provided at a fitting portion between the first case 701 and the second case 702 . The other end 7052 of the reel spring 705 is fixed to the slit 7701 of the reel shaft 770 . The reel spring 705 is arranged at a position different from that of the reel drum 71 in the direction of the axis A on the same rotating shaft as the reel drum 71 . The reel spring 705 biases the operation cord 60 in the direction of winding it around the reel drum 71 .

Next, the action and operation of the operation unit 70 will be described.

FIG. 15 is an AA enlarged sectional view of the operation unit 70. As shown in FIG. As shown in FIG. 15, in the operation unit 70, the reel shaft 770 is inserted in the +X-axis direction from the axis A direction of the operation unit 70 when the first case 701 and the second case 702 are closed. The reel shaft 770 is inserted through the first case 701 and the second case 702 so that the through hole 7733 of the second bevel gear 773 and the through hole 7743 of the first spur gear 774 in the first case 701 and the second case 702 are inserted. pass through. The slit portion 7701 of the reel shaft 770 passing through the through holes 7733 and 7743 is engaged with the other end portion 7052 of the reel spring 705 . When the boss portion 7702 protrudes outward from the first case 701 and the second case 702, the slit portion 7701 of the reel shaft 770 whose slit portion 7701 is engaged with the other end portion 7052 of the reel spring 705 opens radially outward to open the reel. The shaft 770 is prevented from coming off.

Since the inner peripheral portion 721 of the reel drum cover 72 forms an inclined surface with respect to the reel drum 71 , the inner peripheral portion 721 of the reel drum cover 72 can assist the winding operation when the operation cord 60 is wound on the reel drum 71 . can. When the operation cord 60 is wound on the reel drum 71, the cord guide portion 722 prevents the operation cords 60 from being wound in an overlapping state due to the clearance provided between the cord guide portion 722 and the outer peripheral portion of the reel drum 71. The operating cord 60 can be held and guided so as to be aligned and wound.

FIG. 16 is a DD sectional view of the operation unit 70. As shown in FIG. As shown in FIG. 16, in the operation unit 70, when the operation cord 60 is pulled out, the reel drum 71 and the reel shaft 770 are rotated counterclockwise (arrow R1 direction in FIG. 16). At this time, the reel spring 705 (see FIG. 13) fixed to the reel shaft 770 is compressed. After that, when the operator releases the operation cord 60, the compressive force applied to the reel spring 705 is released, and the reel spring 705 is urged clockwise (in the direction of arrow R2 in FIG. 16) in the rewinding direction. When the reel spring 705 biases in the R2 direction, the reel shaft 770 to which the other end 7052 of the reel spring 705 is attached and the reel drum 71 connected to the reel shaft 770 also rotate in the R2 direction. The operation cord 60 is wound around the reel drum 71 by rotating the reel drum 71 in the R2 direction.

[Winding drum unit]
Next, the winding drum unit 50 included in the solar radiation shielding device 1 will be described. As shown in FIG. 1 , the solar radiation shielding device 1 has two winding drum units 50 . In the solar radiation shielding device 1 , the two winding drum units 50 are arranged inside the head box 30 on the left side in the longitudinal direction of the operation unit 70 and the clutch unit 73 . The two winding drum units 50 are connected by an elevating shaft 40 . In addition, in the solar radiation shielding device 1, the number of winding drum units 50 is not particularly limited.

FIG. 17 is a perspective view schematically showing the configuration of the winding drum unit 50 of the solar radiation shielding device 1. As shown in FIG. As shown in FIG. 17, the winding drum unit 50 of the solar radiation shielding device 1 includes a winding drum 51, a winding drum case 52, a winding drum cover 53, a first tilt gear 54, a second tilt gear 55, a gear mount 56, and a A mount cover 57 is provided.

FIG. 18 is an exploded perspective view schematically showing the configuration of the winding drum unit 50. As shown in FIG. 19 is a cross-sectional view of the winding drum unit 50. FIG.

As shown in FIGS. 18 and 19, the winding drum 51 is formed in a substantially cylindrical shape with the axis A direction as the longitudinal direction. The shielding member 10 of the solar radiation shielding device 1 is attached to the winding drum 51 , and the shielding member 10 can be moved up and down by winding up the lifting cord 20 . The winding drum 51 is provided with a drum cap mounting portion 511 for mounting a drum cap 512 on the end (one end) in the −X axis direction. The drum cap 512 is formed in a cylindrical shape with a smaller diameter than the winding drum 51 in order to pivotally support the winding drum 51 on the winding drum case 52 . The winding drum 51 has a cylindrical shaft portion 514 with a diameter smaller than that of the winding drum 51 in order to pivotally support the winding drum 51 on the winding drum case 52 in the +X-axis direction (the other end). is provided. The take-up drum 51 is formed in a tapered shape that decreases in diameter from the shaft portion 514 side toward the -X axis direction (drum cap 512 side). The winding drum 51 is provided with a through hole 515 penetrating from one end to the other end at the center in the direction of the axis A. As shown in FIG.

The winding drum case 52 is formed in a rectangular box shape with one side (upper side) opened. The take-up drum case 52 includes a drum cap supporting portion 521 that is provided at one end whose longitudinal direction is the direction of the axis A and that pivotally supports the drum cap 512 . The other end of the winding drum case 52 is provided with a shaft support portion 522 that supports the shaft portion 514 of the winding drum 51 .

The winding drum cover 53 is mounted on the shaft support portion 522 of the winding drum case 52 . The winding drum cover 53 includes a first inner circumferential portion 531 provided on the inner circumferential surface and facing the shaft portion 514 of the winding drum 51, and the other end side of the winding drum 51, that is, the drum cap 512 side in the longitudinal direction. A cord guide portion 532 provided at the end portion and a second inner peripheral portion 533 provided on the inner peripheral surface and facing the outer peripheral surface of the winding drum are provided. The second inner peripheral portion 533 forms a surface inclined in the longitudinal direction of the winding drum 51 , which is the feed direction of the lifting cord 20 in relation to the outer peripheral surface of the winding drum 51 . The cord guide portion 532 is a concave portion provided with a clearance of 1 or more and less than 2 lift cords 20 in the radial direction of the first inner peripheral portion 531 of the winding drum 51 .

As shown in FIG. 19 , the first tilt gear 54 has a tilt shaft 76 provided parallel to the axis A inserted through a shaft hole 541 and is rotatable integrally with the tilt shaft 76 . The first tilt gear 54 is a rotatable spur gear that meshes with the second tilt gear 55 . That is, the first tilt gear 54 is a gear that transmits the rotational force of the tilt shaft 76 to the second tilt gear 55 .

The second tilt gear 55 is a spur gear provided coaxially with the winding drum 51 . The second tilt gear 55 is provided with an elevating shaft insertion hole 551 through which the elevating shaft 40 can be inserted without contact. That is, the second tilt gear 55 can rotate independently of the elevation shaft 40 by providing the elevation shaft insertion hole 551 . The second tilt gear 55 functions as a ladder drum that transmits the rotational motion of the tilt shaft 76 to the ladder cord 75 . The second tilt gear 55 includes two ladder cords 75 attached side by side in the front-rear direction (Z-axis direction) of the slat 11 and the bottom rail 12 in order to rotate the tilt shaft 76 to change the orientation of the shielding member 10 . is fixed. Therefore, the second tilt gear 55 transmits its own rotational force to the ladder cord 75 , thereby rotating the slat 11 of the shielding member 10 to which the ladder cord 75 is fixed and changing the orientation of the slat 11 .

The gear mount 56 has a first shaft support portion 561 that rotatably supports the first tilt gear 54 and a second shaft support portion 562 that rotatably supports the second tilt gear 55 .

The tilt shaft 76 passes through the shaft hole 541 of the first tilt gear 54 and is rotatable together with the first tilt gear 54 . When the tilt shaft 76 rotates, the first tilt gear 54 rotates, and the second tilt gear 55 meshing with the first tilt gear 54 also rotates. As the second tilt gear 55 rotates, the ladder cord 75 locked to the second tilt gear 55 moves. In the solar radiation shielding device 1 , the slats 11 of the shielding member 10 attached to the ladder cord 75 rotate as the ladder cord 75 moves.

Next, the action and operation of the winding drum unit 50 will be described.

In the winding drum unit 50 , the winding drum 51 can wind up or unwind the lifting cord 20 by the rotational force transmitted from the operation unit 70 by the lifting shaft 40 to move the shielding member 10 up and down.

In the winding drum unit 50 , the winding drum cover 53 has the first inner peripheral portion 531 having a surface inclined in the longitudinal direction of the winding drum 51 , so that the lifting cord 20 is wound on the winding drum 51 . It is possible to assist the winding of the lifting cord 20 when the lifting cord 20 is lifted. When the lifting cord 20 is wound on the winding drum 51, the cord guide portion 532 winds the lifting cords 20 in a state of being overlapped due to the clearance provided between the lifting cord 20 and the outer peripheral portion of the winding drum 51. The lifting cords 20 can be held and guided so as to be aligned and wound so as not to be broken.

Also, in the winding drum unit 50 , the tilt shaft 76 , the first tilt gear 54 , and the second tilt gear 55 can rotate (tilt) the slats 11 of the shielding member 10 via the ladder cords 75 .

As described above, according to the winding drum unit 50, the shielding member 10 in the solar radiation shielding device 1 can be wound up or unwound and rotated in one unit. In other words, according to the winding drum unit 50, it is possible to reduce the size of the components.

[Clutch unit]
Next, the clutch unit 73 included in the solar radiation shielding device 1 will be described. As shown in FIG. 1 , in the solar radiation shielding device 1 , the clutch unit 73 is arranged inside the head box 30 between the operation unit 70 and the winding drum unit 50 in the direction of the axis A. As shown in FIG.

FIG. 20 is a perspective view schematically showing the configuration of the clutch unit 73 of the solar radiation shielding device 1. As shown in FIG. FIG. 21 is a cross-sectional view schematically showing the configuration of the clutch unit 73. As shown in FIG. FIG. 22 is an exploded perspective view schematically showing the configuration of the clutch unit 73. As shown in FIG. As shown in FIGS. 20 to 22, the clutch unit 73 includes a first transmitting-side rotating portion 26 connected to the one-way clutch 74 of the operating unit 70 and a first transmitted-side rotating portion 28 connected to the lifting shaft 40. , a cam drum 21, a clutch case 200, a holding groove 201 formed on the inner surface of the clutch case 200, and holding the clutch ball 220 movably within a predetermined range in the direction of the axis A, and the clutch ball 220. .

The first transmission-side rotating portion 26 includes a first drive shaft 260 , a clutch spring cylinder 230 spline-connected to the first drive shaft 260 , a clutch spring 240 , and a transmission-side engagement fixed to the tip of the clutch spring cylinder 230 . A board 231 is provided.

The first drive shaft 260 is connected to the one-way clutch 74 of the input unit 733, and rotates in the first rotation direction (counterclockwise direction) R1 by pulling the operation cord 60 in one direction. Clutch spring tube 230 is spline-connected to first drive shaft 260 , rotates together with first drive shaft 260 , and is relatively movable along first drive shaft 260 in the direction of axis A.

A clutch spring 240 is wound around the outer peripheral surface of the clutch spring cylinder 230 . Clutch spring 240 normally tightens the outer peripheral surface of clutch spring cylinder 230 by its elasticity, and rotates together with clutch spring cylinder 230 when it rotates.

The first drive shaft 260 is rotatably inserted into the cam drum 21 together with a clutch spring cylinder 230 having a transmission-side engagement disk 231 at its tip. One end of the clutch spring 240 is engaged with an engagement portion formed by cutting out the base end of the cam drum 21 .

The cam drum 21 is rotatable together with the clutch spring cylinder 230 via one end of the clutch spring 240, and is rotatable relative to the clutch spring cylinder 230 when the clutch spring 240 is loosened. , is movable in the direction of the axis A relative to the first drive shaft 260 .

The clutch case 200 is fixed to the headbox 30 (see FIG. 1). A cam cover 250 is attached to the base end of the cam drum 21 , and the cam drum 21 is rotatably inserted into the clutch case 200 together with the first drive shaft 260 and the clutch spring cylinder 230 .

An endless cam groove 210 is formed on the outer peripheral surface of the cam drum 21 , and a holding groove 201 is formed on the inner surface of the clutch case 200 . A clutch ball 220 is rotatably fitted in the cam groove 210 and the holding groove 201 .

The first transmission-side rotating portion 28 includes a first driven shaft 280 and a transmission-side engagement disc 282 fixed to the base end of the first driven shaft 280 . The base end side of the first driven shaft 280 having the transmission side meshing disk 282 is rotatably inserted in the clutch case 200 and the cam drum 21 . The tip side of the first driven shaft 280 is connected to the elevation shaft 40 by a connector 290 and rotates together with the elevation shaft 40 .

24A and 24B are development views of the cam drum 21 of the clutch unit 73 for explaining the action, in which FIG. 24A shows the disengaged state and FIG. 24B shows the engaged state. 24A and 24B are development views of the cam drum 21 of the clutch unit 73 for explaining the action, in which (a) shows the stopped state and (b) shows the held state.

24 and 25 are developed views of the cam grooves 210 formed on the outer peripheral surface of the cam drum 21 of the clutch unit 73. FIG. Also, a retaining groove 201 stationary provided on the inner surface of the clutch case 200 is schematically shown to show the relative position in the direction of the axis A with respect to the cam drum 21 movable in the direction of the axis A. As shown in FIG.

The transmission-side meshing disc 231 is configured to move in the direction of the axis A together with the cam drum 21. For convenience of explanation, the transmission-side meshing disc 231 is added to the tip side of the cam drum 21 in FIGS. clearly shown. Further, the transmission-side meshing disc 282 that is provided stationary without moving in the direction of the axis A is schematically shown facing the transmission-side meshing disc 231 .

The cam groove 210 has, as a main groove, a winding groove 218 (see the dashed-dotted lines in FIGS. 24 and 25) formed continuously in an endless manner in the circumferential direction. The hoisting groove 218 includes an engagement portion 216 curved toward the base end (to the right in FIGS. 24 and 25) and a stopping portion convexly curved in a direction opposite to the first rotation direction (winding direction) of the cam drum 21. 215 and a holding portion 221 convexly curved in the first rotational direction of the cam drum 21 .

The meshing portion 216 performs the transmission operation of the clutch unit 73 when the clutch ball 220 is moved relative to the cam drum 21 as will be described later. The stopping portion 215 restricts rotation of the cam drum 21 in the first rotational direction (counterclockwise) when the clutch ball 220 is relatively moved and positioned there, as will be described later.

Also, as will be described later, when the operation cord 60 is released from being pulled in one direction, the clutch ball 220 enters the holding portion 221 and the cam drum 21 is moved due to the fall of the shielding member 10's own weight. Rotation in the second rotational direction (clockwise) is restrained, and the shielding member 10 does not fall under its own weight.

The cam groove 210 has a main release groove 222 branched from the winding groove 218 near the holding portion 221 and a secondary release groove 217 branched from the winding groove 218 near the engaging portion 216 . The main release groove 222 has an inclined portion 223 toward the distal end side and a main release portion 213 that abuts therefrom. As will be described later, the main release portion 213 performs the transmission release operation of the clutch unit 73 when the clutch ball 220 is relatively moved and positioned there (see FIG. 24(a)).

The sub-release groove 217 has a sloped portion toward the base end side and a sub-release portion 219 that abuts on the tip. As will be described later, when the clutch ball 220 is relatively moved to the auxiliary release portion 219, the clutch unit 73 performs a transmission release operation.

When the cam drum 21 rotates with the rotation of the first drive shaft 260, the clutch ball 220 moves in the direction of the axis A within the holding groove 201 within the range of the length L in the direction of the axis A of the holding groove 201, and It moves within 210 relative to the cam drum 21 . The length L of the holding groove 201 in the direction of the axis A is the direction of the axis A between the release portion (the main release portion 213 and the secondary release portion 219) located on the distal side of the engaging portion 216 located on the proximal side of the cam groove 210. are formed smaller than the interval D (see FIG. 24(a)).

When the clutch ball 220 moves to one end and the other end of the holding groove 201, it is restrained there and cannot move further, so that the cam drum 21 moves in the direction of the axis A relative to the restrained clutch ball 220. , the clutch ball 220 can move to the main release portion 213 and the engagement portion 216 and be positioned.

As a result, the transmission-side meshing disc 231 moving in the direction of the axis A together with the cam drum 21 meshes with or disengages from the stationary transmission-side meshing disc 282 .

Next, operation of the clutch unit 73 in the solar radiation shielding device 1 will be described.

First, the operation of the clutch unit 73 when raising the shielding member 10 in the solar radiation shielding device 1 will be described. Before starting the operation, the clutch unit 73 is in a disengaged state, that is, as shown in FIG. The transmission-side engagement discs 282 are separated from each other and disengaged. From this state, the operation cord 60 is pulled in one direction to raise the shielding member 10 (hoisting operation to wind up the lifting cord 20). explain.

When the operation cord 60 is pulled in one direction and operated, the reel drum 71 of the operation unit 70 shown in FIG. 13 rotates in the first rotation direction (counterclockwise direction).

This rotation is transmitted via the one-way clutch 74 to the first drive shaft 260 of the first transmission-side rotating portion 26 in the clutch unit 73, and the first drive shaft 260 rotates in the first rotation direction (counterclockwise in this embodiment). direction).

When the first drive shaft 260 rotates in the first rotational direction (counterclockwise direction), one end of the clutch spring 240 wound around the clutch spring cylinder 230 rotates the cam drum 21 in the first rotational direction (counterclockwise direction). counterclockwise direction).

As shown in FIG. 24(a), the clutch ball 220 stopped at the main release portion 213 of the main release groove 222 is moved relative to the cam drum 21 from the main release portion 213 of the main release groove 222 to the inclined portion. 223, moves from the bifurcation 214 to the winding groove 218, and moves to the base end side (to the right in FIG. 24(a)) within the holding groove 201. As shown in FIG.

When the clutch ball 220 reaches the base end (the right end in FIG. 24(a)) of the holding groove 201, further movement in the direction of the axis A is restrained, so that the cam drum 21 moves toward the tip side in the direction of the axis A. Moving.

Then, the transmission-side meshing disk 231 of the clutch spring cylinder 230, which moves in the direction of the axis A along with the cam drum 21, also moves toward the tip side in the direction of the axis A, and as shown in FIG. Then, the clutch unit 73 is in a transmission state.

Rotation of the first drive shaft 260 in the first rotational direction (counterclockwise direction) is transmitted to the first driven shaft 280 via the transmission-side engagement disk 231 and the transmission-side engagement disk 282, The lifting (winding up) operation of the shielding member 10 by 40 is started.

Further, if the operation cord 60 is continued to be operated, the cam drum 21 continues to rotate in the first rotation direction (counterclockwise direction), and the clutch ball 220 reaches the stop portion 215 as shown in FIG. 25(a). Then, since the clutch ball 220 is restrained by the stop portion 215, the rotation of the cam drum 21 is restrained and stopped.

In this state, when the operation cord 60 is continuously operated to rotate the first drive shaft 260 and the clutch spring cylinder 230 in the first rotation direction (counterclockwise direction), one end of the clutch spring 240 engages the cam drum 21 . Since the clutch spring 240 stops rotating together with the cam drum 21, the clamping of the clutch spring tube 230 by the clutch spring 240 is loosened.

Therefore, when the operation cord 60 is operated to continue the rotation of the first drive shaft 260, the cam drum 21 stops rotating, but the clutch spring cylinder 230 continues to rotate while slipping against the clutch spring 240. Drive shaft 280 also continues to rotate.

After the shielding member 10 is lifted (rolled up) to a desired height, pulling the operation cord 60 in one direction is stopped and the operation is stopped. It rotates in the opposite direction, that is, in the second rotational direction (clockwise direction), and further rotates the first driven shaft 280, the transmission-side meshing disk 282, the transmission-side meshing disk 231, the clutch spring cylinder 230, and the clutch spring 240. Through, the cam drum 21 rotates in the second rotational direction (clockwise direction).

This rotation causes the clutch ball 220 to enter the holding portion 221 as shown in FIG. stops. Thereby, the shielding member 10 can be held open to a desired height.

Next, when lowering the shielding member 10 in the rolled-up state, the operation cord 60 is slightly pulled in the same direction as when raising it, and the clutch ball 220 is released in the clutch unit 73 as shown in FIG. 25(b). From the holding portion 221 , it advances along the hoisting groove 218 and moves relative to the cam drum 21 to a branch portion 214 with the main release groove 222 or a position beyond the branch portion 214 .

Then, when the operation is stopped by stopping pulling the operation cord 60 in one direction, the elevating shaft 40 rotates in the second rotation direction (clockwise direction) due to the weight of the shielding member 10, and the first driven shaft The cam drum 21 is rotated in the second rotation direction (clockwise direction) via the transmission side meshing disk 280 , the transmission side meshing disk 282 , the transmission side meshing disk 231 , the clutch spring cylinder 230 and the clutch spring 240 .

The clutch ball 220 enters the main release groove 222 from the branched portion 214 and tries to move from the inclined portion 223 to the main release portion 213 relative to the cam drum 21 . Since the movement of is restrained, the cam drum 21 moves toward the base end side.

As shown in FIG. 24(a), the transmission-side meshing disc 231 and the transmission-side meshing disc 282 are separated from each other, and the meshing is released. Then, the transmission receiving side meshing disk 282, the first driven shaft 280, and the lifting shaft 40 become freely rotatable, and the shielding member 10 descends under its own weight to be in a closed state.

Since the meshing between the transmission-side meshing disk 231 and the transmission-side meshing disk 282 is released, the rotation of the first driven shaft 280 in the second rotational direction (clockwise direction) due to the fall of the shielding member 10 is No. 1 is not transmitted to the drive shaft 260 , the clutch spring cylinder 230 and the cam drum 21 .

As described above, during the lifting (hoisting operation), the transmission side meshing disc 231 of the first transmission side rotating portion 26 and the transmission side meshing disc 282 of the first transmission side rotating portion 28 are disengaged ( 24(a)), the operation cord 60 is pulled in one direction to bring it into the meshed state as shown in FIG. 24(b), and the shielding member 10 is rolled up.

When the operation of the operation cord 60 is stopped immediately after the meshing state is established in this way, the cam drum 21 rotates in the first rotation direction (counterclockwise direction), and the clutch ball 220 and the meshing portion (not shown) rotate. After passing through 216, it enters the secondary release groove 217 and stops at the secondary release portion 219 thereof.

As a result, as in the case where the clutch ball 220 enters the main release groove 222 (see FIG. 24(a)), the transmission-side engagement disc 231 of the first transmission-side rotation portion 26 and the first transmission-side rotation portion 28 are released. The meshing of the transmission-receiving side meshing disc 282 is released.

As described above, in the solar radiation shielding device 1, the clutch unit 73 switches the state of transmitting the rotation of the reel drum 71 of the operation unit 70 to the lifting shaft 40 and the state of non-transmitting it. It has the function of the stopper unit used in the shielding device.

Further, as described above, in the solar radiation shielding device 1 , the clutch unit 73 can hold the shielding member 10 at a position where the shielding member 10 is folded up toward the head box 30 .

[Operation pole part]
Next, the operation pole portion 90 included in the solar radiation shielding device 1 will be described. As shown in FIG. 1 , in the solar radiation shielding device 1 , the operation pole portion 90 is connected to the pole connection portion 7712 of the input gear 771 of the operation unit 70 by a first universal joint 91 and a second universal joint 92 . An operation cord 60 pulled out from the operation unit 70 is attached to the operation pole portion 90 .

FIG. 26 is a perspective view schematically showing the configuration of the operation pole portion 90 of the solar radiation shielding device 1. As shown in FIG. 27 is an exploded perspective view schematically showing the configuration of the operation pole section 90. As shown in FIG. 28 is a cross-sectional view schematically showing the configuration of the operation pole portion 90 when it is not operated.

As shown in FIGS. 26 to 28, the operation pole section 90 includes a first universal joint 91, a second universal joint 92, a pole body 93, a grip 94, a cord tassel 95, a pole end 96, and a grip end 97.

The first universal joint 91 and the second universal joint 92 constitute a universal joint capable of joining the operation pole portion 90 to the input gear 771 at any angle as described above. The first universal joint 91 and the second universal joint 92 are provided with holes through which the operation cord 60 can be inserted.

The pole body 93 is a tubular member (for example, a hexagonal prism as shown in FIG. 26) having a space inside and penetrating between one end and the other end in the longitudinal direction. The pole body 93 is connected to the second universal joint 92 at one end 931 provided at one end in the longitudinal direction. The other end 932 of the pole body 93 opposite to the one end 931 in the longitudinal direction is inserted into a pole body insertion hole 943 provided in the one end 941 of the grip 94 . A groove 933 is provided on the outer peripheral surface of the pole body 93 on the side of the other end portion 932 . The operation cord 60 can be inserted through the inner peripheral surface 934 of the pole body 93 .

The grip 94 is a cylindrical member having a space inside (for example, a substantially conical shape with one end 941 side truncated as shown in FIG. 26). The grip 94 is provided with a pole body insertion hole 943 for inserting and connecting the pole body 93 to one end portion 941 provided at one end in the longitudinal direction. Also, the grip 94 communicates with the internal space at the other end 942 opposite to the one end 941 in the longitudinal direction. The operation cord 60 can be inserted through the inner peripheral surface 944 of the grip 94 .

The cord tassel 95 is a cylindrical member having a space inside (for example, a substantially conical shape with one end 951 side truncated as shown in FIG. 26). The cord tassel 95 is in contact with the other end 942 of the grip 94 at one end 951 provided at one end in the longitudinal direction. One end 951 of the cord tassel 95 is provided with an insertion hole 952 for inserting the operation cord 60 . Also, the cord tassel 95 prevents the operation cord 60 from coming off by a knot 61 provided at the end of the operation pole portion 90 on the back surface of the one end portion 951 .

As shown in FIG. 27, the pole end 96 is a C-shaped member having a notch 962 that connects an outer peripheral surface 960 and an inner peripheral surface 961 in a part of the ring. An inner peripheral surface 961 of the pole end 96 is fitted into the groove 933 of the pole body 93 from the notch 962 .

The grip end 97 is a C-shaped member provided with a notch 972 connecting an outer peripheral surface 970 and an inner peripheral surface 971 in a part of the ring. The outer peripheral surface 970 of the grip end 97 is fitted to the inner peripheral surface 944 of the grip 94 . The inner diameter of the inner peripheral surface 971 of the grip end 97 is larger than the outer diameter of the pole body 93 . A pole end 96 having an outer peripheral surface 960 smaller in diameter than the inner diameter of the inner peripheral surface 944 of the grip 94 is fitted into the groove 933 of the pole body 93 . Therefore, the pole body 93 is movable between the one end portion 941 inside the inner peripheral surface 944 of the grip 94 and the grip end 97 .

Next, the operation of the operation pole section 90 will be described.
FIG. 29 is an enlarged cross-sectional view schematically showing the configuration of the operation pole portion 90 when it is not operated. As shown in FIGS. 28 and 29 , in the operation pole portion 90 , the operation cord 60 is pulled from the operation unit 70 when the operation unit 70 is not operated (during non-operation). For this reason, in the operation pole portion 90, the other end portion 942 of the grip 94 and the one end portion 951 of the cord tassel 95 are in contact with each other, and the grip end 97 and the pole end are fitted inside the inner peripheral surface 944 of the grip 94. 96 are in contact.

30A and 30B are cross-sectional views schematically showing the operation of the operation pole portion 90 during operation. As shown in FIG. 30, when the operator pulls the cord tassel 95 downward in FIG. 33, the operating cord 60 is pulled out from the operating unit 70 and the reel drum 71 of the operating unit 70 rotates. As the reel drum 71 rotates, the rotational force is transmitted to the winding drum unit 50 via the clutch unit 73 and the lifting shaft 40, and the lifting cord 20 is wound up, thereby lifting the shielding member 10.

31A and 31B are cross-sectional views schematically showing the operation of the operation pole portion 90 during the downward operation. As shown in FIG. 31 , when the shielding member 10 is lowered in the solar radiation shielding device 1 , the grip 94 and the cord tassel 95 are pulled downward in the axial line A direction of the pole body 93 . As the cord tassel 95 is pulled down, the operation cord 60 is pulled out by a predetermined amount, so that the reel drum 71 of the operation unit 70 rotates by a predetermined angle. By this predetermined operation, in the clutch unit 73, the clutch ball 220 enters the main releasing portion 213 (see FIG. 25(a)) of the cam drum 21. As shown in FIG.

As described above, according to the operation pole portion 90, the lowering operation of the shielding member 10 in the solar radiation shielding device 1 can be realized by a simple operation of pulling the grip 94. 10 operability can be improved.

Further, according to the operation pole portion 90 , if the grip 94 can be moved by a large amount, the shielding member 10 can be moved up and down by operating the grip 94 .

[Effects of Embodiment]
As described above, the operation unit 70 of the solar radiation shielding device 1 includes the reel drum 71, the reel spring 705, the clutch unit 73, and the one-way clutch 74 for winding the operation cord 60 and raising and lowering the shielding member 10, and the operation unit 70. A tilt shaft 76 and a rotation transmission part 77 are provided for opening and closing the shielding member 10 to change the direction of the shielding member 10 by means of the operation pole part 90 to which the cord 60 is attached. Therefore, according to the solar radiation shielding device 1 , the slats 11 can be rotated by operating one operation cord 60 in the vertical direction to raise and lower the shielding member 10 and rotating the operation pole portion 90 . .

In addition, according to the solar radiation shielding device 1, the operation cord 60 can be prevented from being caught, unlike a solar radiation shielding device having two operation cords, since the operation can be performed with one operation cord 60.

In the solar radiation shielding device 1 , the operation cord 60 is accommodated inside the input gear 771 and the pole body 93 of the operation pole portion 90 . Therefore, according to the solar radiation shielding device 1, it is possible to suppress the operation cord 60 from hanging down even when the shielding member 10 is folded up, so that the design can be improved.

Further, in the solar radiation shielding device 1, the second tilt gear 55 is provided on the axis A that is the same axis as the winding drum 51, and the elevating shaft 40 is rotatably inserted between the clutch unit 73 and the winding drum 51. It has an elevating shaft insertion hole 551 that Therefore, according to the solar radiation shielding device 1 , the components can be compactly housed inside the headbox 30 .

[Example of operation]
Next, an example of the operation of the solar radiation shielding device 1 configured as described above will be described.

[Up and down operation]
A vertical operation of the shielding member 10 in the solar radiation shielding device 1 will be described.
As shown in FIG. 30 , when the cord tassel 95 is pulled by the operator, the operation cord 60 fixed to the cord tassel 95 is pulled out from the reel drum 71 of the operation unit 70 .

By pulling out the operation cord 60 from the reel drum 71, the reel drum 71 of the operation unit 70 rotates counterclockwise R1 as shown in FIG. As the reel drum 71 rotates, the reel shaft 770 connected to the reel drum 71 also rotates counterclockwise R1. At this time, the reel spring 705 attached to the slit portion 7701 of the reel shaft 770 is wound, so that a biasing force is accumulated in the reel spring 705 .

On the other hand, the drum cap 741 attached to the fitting recess 713 provided on the −X-axis direction side surface of the reel drum 71 also rotates together with the reel drum 71 . A one-way clutch 74 is fitted to the drum cap 741 . Rotation of the reel drum 71 is transmitted to the first drive shaft 260 of the clutch unit 73 by the one-way clutch 74 .

When the first drive shaft 260 rotates and the clutch unit 73 operates as described above, the clutch unit 73 can transmit or not transmit the rotational force to the lifting shaft 40 and hold the shielding member 10 . Become. Here, transmission/non-transmission of the rotational force to the elevation shaft 40 and holding of the shielding member 10 are selected according to the distance of the operation cord 60 pulled out from the cord tassel 95 of the operation pole portion 90 .

By rotating the elevating shaft 40 via the clutch unit 73 , the winding drum unit 50 causes the winding drum 51 to wind the elevating cord 20 fixed to the bottom rail 12 , thereby elevating the shielding member 10 . When the elevating shaft 40 rotates to move the shielding member 10 in the downward direction (−Z axis direction), the speed controller 80 shown in FIG. .

When the transmission side meshing disk 231 and the transmission side meshing disk 282 are separated in the clutch unit 73, the lifting shaft 40 and the first drive shaft 260 are separated. Therefore, the rotation of the elevation shaft 40 is not transmitted to the operation unit 70 .

As shown in FIG. 28, when the force in the pulling direction of the operation cord 60 in the operation pole portion 90 is relaxed, the reel drum 71 and the reel shaft 770 move as shown in FIG. , rotate clockwise R2. The operation cord 60 is wound around the reel drum 71 by rotating the reel drum 71 clockwise R2. At this time, the operation cord 60 is guided by the inner peripheral portion 721 of the reel drum cover 72 and is reeled in alignment with the reel drum 71 .

The clockwise R2 rotation of the reel drum 71 is not transmitted to the first drive shaft 260 of the clutch unit 73 by the one-way clutch 74 . That is, the clockwise rotation R2 of the reel drum 71 caused by returning the operation cord 60 is not transmitted to the winding drum 51 of the winding drum unit 50 .

As described above, the solar radiation shielding device 1 raises the operation cord 60 from the operation pole portion 90 by pulling out the operation cord 60 from the operation pole portion 90 by a certain amount or more, and returns the operation cord 60 to the operation pole portion 90. , the raised position can be held by the action of the clutch unit 73 .

In addition, when the shielding member 10 is to be lowered, the solar radiation shielding device 1 is operated by slightly pulling the operation cord 60 from the operation pole portion 90. , the lifting shaft 40 is rotated by the weight of the bottom rail 12 and descends.

[Tilt operation]
A tilting operation of the shielding member 10 in the solar radiation shielding device 1 will be described.
When the operator rotates the grip 94 of the operation pole portion 90 with the longitudinal direction of the operation pole portion 90 as the axial direction, the operation unit 70 connected by the first universal joint 91 and the second universal joint 92 of the operation pole portion 90 is rotated. Input gear 771 rotates.

The rotation of the input gear 771 is transmitted to the gear members of the rotation transmission section 77 , namely the first bevel gear 772 , the second bevel gear 773 , the first spur gear 774 and the second spur gear 775 . The second spur gear 775 has the tilt shaft 76 inserted in the center of the rotation shaft. Therefore, the rotational force input from the input gear 771 is transmitted to the tilt shaft 76 .

The rotational force of the tilt shaft 76 is transmitted to the first tilt gear 54 of the winding drum unit 50 . The rotational force of the first tilt gear 54 is transmitted to the second tilt gear 55 . The tip of the warp of the ladder cord 75 is fixed to the second tilt gear 55 by a slit portion 552 . Therefore, when the second tilt gear 55 rotates, the front and rear warps of the ladder cord 75 relatively move in the vertical direction (Z-axis direction), and the slat 11 attached to the ladder cord 75 rotates.

10 or 13, the reel shaft 770 is inserted through the through hole 7733 of the second bevel gear 773 and the through hole 7743 of the first spur gear 774 without contact. there is Therefore, the rotation of the gear member of the rotation transmitting portion 77 can rotate only the tilt shaft 76 independently without affecting the reel shaft 770 .

[Descent operation by grip]
A lowering operation of the shielding member 10 by operating the grip 94 in the solar radiation shielding device 1 will be described.

As described above, the lowering operation of the shielding member 10 is possible by pulling the operation cord 60 a little using the cord tassel 95, but it is also possible by pulling down the grip 94. FIG.

As shown in FIG. 28, when the operation cord 60 is not operated, one end 951 of the cord tassel 95 is in contact with the other end 942 of the grip 94 due to the return force of the reel spring 705. . That is, in this state, the cord tassel 95 is in a position where the grip 94 is pushed up within the movable range of the grip 94 with respect to the pole body 93 .

When the grip 94 is pulled down in the above state, as shown in FIG. 31, the pole end 96 contacts the upper end of the inner peripheral surface 944 of the grip 94 inside the grip 94, and the cord tassel 95 can be pulled down by a predetermined amount. can. At this time, the amount of movement of the cord tassel 95 by pulling down the grip 94 is the amount necessary to disconnect the lifting shaft 40 in the clutch unit 73 .

As described above, the solar radiation shielding device 1 can lower the shielding member 10 by a simple operation of grasping the grip 94 and pulling it down. In addition, since the solar radiation shielding device 1 can make the amount of pulling the operation cord 60 constant in order to lower the shielding member 10, the lowering operation can be reliably performed. That is, the solar radiation shielding device 1 can prevent the position of the cam drum 21 in the clutch unit 73 from reaching the holding position due to excessive pulling of the operation cord 60, for example.

Although the embodiments of the present invention have been described above, the present invention is not limited to the solar radiation shielding devices according to the above-described embodiments of the present invention. including. For example, in the solar radiation shielding device 1, the material, number, and dimensions of the slats are not limited. Moreover, each configuration may be selectively combined as appropriate so as to achieve at least part of the above-described problems and effects. For example, the shape, material, arrangement, size, etc. of each component in the above embodiment may be changed as appropriate according to the specific usage of the present invention.

DESCRIPTION OF SYMBOLS 1... Solar radiation shielding device 10... Shielding member 11... Slat 12... Bottom rail 20... Lifting cord 21... Cam drum 26... First transmission side rotation part 28... First transmission side rotation part 30... Head box 40 Lifting shaft 50 Winding drum unit 51 Winding drum 52 Winding drum case 53 Winding drum cover 54 First tilt gear 55 Second tilt gear 56 Gear mount , 57... Mount cover, 60... Operation cord, 61... Knot, 70... Operation unit, 71... Reel drum, 72... Reel drum cover, 73... Clutch unit, 74... One-way clutch, 75... Ladder cord, 76... Tilt shaft , 77... Rotation transmission part, 80... Speed controller, 90... Operation pole part, 91... First universal joint, 92... Second universal joint, 93... Pole main body, 94... Grip, 95... Cord tassel, 96... Pole end , 97... Grip end 200... Clutch case 201... Holding groove 210... Cam groove 213... Main release part 214... Branch part 215... Stop part 216... Engagement part 217... Sub release groove 218... Winding groove 219 Auxiliary release portion 220 Clutch ball 221 Holding portion 222 Main release groove 223 Inclined portion 230 Clutch spring cylinder 231 Transmission side meshing disc 240 Clutch spring 250 Cam cover 260 First drive shaft 280 First driven shaft 282 Engagement disc on transmission side 290 Coupling 511 Drum cap mounting portion 512 Drum cap 514 Shaft 515 Penetration Holes 521 Drum cap supporting portion 522 Shaft supporting portion 531 First inner peripheral portion 532 Cord guide portion 533 Second inner peripheral portion 541 Shaft hole 551 Elevating shaft insertion hole 552... Slit part 561... First shaft support part 562... Second shaft support part 701... First case 702... Second case 703... Stop ring 706... Stop ring 711... Cross recessed part 712... Hole part , 713... Fitting concave part, 721... Inner circumference part, 722... Cord guide part, 733... Input part unit, 741... Drum cap, 770... Reel shaft, 771... Input gear, 772... First bevel gear, 773... Second Bevel gear 774 First spur gear 775 Second spur gear 931 One end 932 The other end 933 Groove 934 Inner peripheral surface 941 One end 942 The other end 943 Pole body insertion hole 944 Inner peripheral surface 951 One end 952 Insertion hole 960 Outer peripheral surface 961 Inner peripheral surface 962 Notch 970 Outer peripheral surface 971 Inner peripheral surface 972 Notch 7011 First clearance 7021 Second clearance 7051 One end 7052 The other end 7411 One-way clutch accommodating portion 7412 Fitting projection 7701 Slit 7702 Boss Part 7703 Cross convex portion 7704 Round convex portion 7711 Bevel gear 7712 Pole connecting portion 7713 Cord passing hole 7731 Second bevel gear body 7732 Fitting portion 7733 Through hole 7741 First spur gear main body 7742 ... fitting portion 7743 ... through hole 7751 ... tilt shaft fitting portion

Claims (5)

a shielding member;
an elevating cord for elevating the shielding member;
a head box that supports the shielding member via the lifting cord;
an elevator shaft rotatably supported within the headbox;
a winding drum that is rotated by the lifting shaft to wind the lifting cord and raise and lower the shielding member;
an operation unit that rotates the elevating shaft by pulling out an operation cord;
A solar radiation shielding device comprising:
The operation unit is
a reel drum for winding the operation cord;
a biasing member that biases the operation cord in a winding direction on the reel drum;
A clutch unit that selectively switches between a transmission state in which the rotational force of the reel drum is transmitted to the elevating shaft and a non-transmission state in which the transmission is not performed, and restricts rotation of the elevating shaft in a direction in which the shielding member descends due to its own weight. and,
a one-way clutch provided between the reel drum and the clutch unit for transmitting rotation of the reel drum only to the clutch unit;
a tilt shaft that is rotatably supported in the head box and that changes the orientation of the shielding member by relatively moving a ladder cord attached to the shielding member up and down according to rotation;
a rotation transmission portion having an input portion through which the operation cord is inserted and into which a rotational force is input, and transmitting the rotational force to the tilt shaft to rotate the tilt shaft;
A solar shading device comprising: A ladder drum provided on the same axis as the winding drum and transmitting the rotational force from the rotation transmission unit to the tilt shaft,
A solar shading device according to claim 1. The ladder drum has an elevating shaft insertion hole through which the elevating shaft is rotatably inserted between the clutch unit and the winding drum,
A solar shading device according to claim 2. The rotation transmission part is
a gear member that transmits a rotational force input from the input portion to the tilt shaft;
A solar shading device according to any one of claims 1 to 3. The tilt axis is parallel to the elevation axis and provided at a position spaced apart from the elevation axis,
A solar shading device according to any one of claims 1 to 4.

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