JP2006028871A - Solar radiation shielding device and shielding material lifting device for solar radiation shielding device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a shielding material lifting / lowering device for a solar radiation shielding device capable of increasing the descending speed of the solar radiation shielding material as compared with the ascending speed while enabling the operation means to control the lifting speed and the lowering speed of the solar radiation shielding material.
An input shaft 8 that rotates forward and backward based on an operation of an operation means, a drive shaft 14 that rotates forward and backward based on the rotation of the input shaft 8, and a shielding material based on the rotation of the drive shaft 14. In a solar radiation shielding device having a winding shaft that moves up and down in the head box, transmission means 28 for transmitting the rotation of the input shaft 8 in the shielding material descending direction to the output shaft at a higher speed than the rotation in the shielding material ascending direction, 48, 51, 38, and transmission blocking means 17, 43 for blocking the rotation of the input shaft 8 due to the rotational force acting on the winding shaft based on the weight of the shielding material.
[Selection] Figure 2

Description

  The present invention relates to a solar shading device such as a horizontal blind, a pleated curtain, a raised curtain, and a roll screen.

  Conventionally, in the solar shading device, the solar shading material is suspended and supported from the head box, or the solar shading material is suspended and supported from the winding shaft. The former is a horizontal blind, a pleated curtain, a raised curtain and the like. The latter is a roll screen, a shutter or the like.

In the horizontal blind, a plurality of slats (sunlight shielding materials) and a bottom rail are suspended and supported via a plurality of ladder cords suspended from the head box.
In the pleated curtain, a zigzag curtain fabric (sunlight shielding material) is supported suspended from the head box. Further, some curtains are draped with a bottom rail supported at the lower end of the curtain fabric (sunlight shielding material) and others with a weight suspended at the lower end of the lifting / lowering cord.

  In the case of a horizontal blind, a pleated screen, and a curtain for raising, a plurality of elevating cords are inserted into the solar shading material, and one end (upper end) of the elevating cord is wound around a winding shaft disposed in the head box, The other end (lower end) is connected to a bottom rail or a weight. The solar shading material is pulled up by operating the winding shaft in the winding direction of the lifting / lowering cord, and the solar shading material is lowered by operating the winding shaft in the unwinding direction of the lifting / lowering cord. ing.

  In the case of a roll screen, the screen, which is a solar shielding material, is suspended and supported from the winding shaft, the screen is lifted by operating the winding shaft in the screen winding direction, and the screen is lowered by operating in the rewinding direction. It is configured to let you.

  In such a solar shading device, when lifting the solar shading material, it is necessary to wind the lifting cord around the winding shaft against the weight of the solar shading material, or to wind the screen around the winding shaft, There is a problem that the operation force during the lifting operation of the shielding material is increased.

  Thus, a configuration has been proposed in which a reduction gear is incorporated into the operating device to reduce the operating force during the lifting operation, but in such a configuration, both the speed of the lifting operation and the lowering operation of the solar radiation shielding material are proposed. descend.

  Patent Document 1 has a configuration in which a clutch device is interposed in an operating device for a horizontal blind, and when the slat is lowered, the clutch device is disconnected and the slat is lowered by its own weight, thereby increasing the slat descending speed. It is disclosed.

  Patent Document 2 discloses a configuration in which an operation force required for a shutter curtain lifting operation is reduced by a balance spring, and a shutter curtain lifting speed is made higher than a descending speed by a speed change mechanism.

Patent Document 3 discloses a configuration that includes a driven sprocket for raising the shutter curtain and a driven sprocket for lowering the shutter curtain, and makes the shutter curtain raising speed faster than the descending speed.
Japanese Patent No. 3140295 JP-A-5-59878 Japanese Unexamined Patent Publication No. 2000-136686

  The horizontal blind described in Patent Document 1 has a configuration in which the slat is lowered by its own weight. Therefore, the lowering speed is higher than necessary, and it is difficult to accurately stop the slat at a desired position. In addition, when a governor device for limiting the descending speed is added, the cost increases and it is necessary to prepare a plurality of types of governor devices that match the size of the blind.

  Patent Document 2 does not disclose a configuration for increasing the descending speed. If the balance spring described in Patent Document 2 is made to act in the downward direction of the shutter curtain, the downward speed can be increased.

  However, if the driven gear and the idle gear are disengaged when switching between the lifting operation and the lowering operation, the shutter curtain is lowered even when the lowering operation is not performed due to the biasing force of the balance spring and the weight of the shutter curtain. There is a problem.

In addition, since the driven gear, the two idle gears, and the four rotating shafts that respectively support the driving gear need to be arranged in parallel, there is a problem that the operating device becomes large.
Also in Patent Document 3, a configuration for increasing the descending speed is not disclosed.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a shielding material lifting / lowering device for a solar radiation shielding device capable of increasing the descending speed of the solar radiation shielding material relative to the ascending speed while allowing the operating means to control the lifting and lowering speed of the solar radiation shielding material. There is to do.

  In claim 1, the input shaft that is rotated forward and backward based on the operation of the operating means, the drive shaft that is rotated forward and backward based on the rotation of the input shaft, and the shielding material based on the rotation of the drive shaft In a solar radiation shielding device having a winding shaft that moves up and down in a head box, transmission means for transmitting the rotation of the input shaft in the shielding material descending direction to the drive shaft at a higher speed than the rotation in the shielding material ascending direction And a transmission blocking means for blocking the rotation of the input shaft due to the rotational force acting on the winding shaft based on the weight of the shielding material.

  In claim 2, the transmission means directly connects the input shaft and the drive shaft when the input shaft is rotated in the shielding material pulling direction, and when the input shaft is rotated in the shielding material lowering direction, A first transmission means for releasing the direct connection state between the input shaft and the drive shaft; and when the input shaft is rotated in the shielding material lowering direction, after the direct connection state between the input shaft and the drive shaft is released, And second transmission means for increasing the speed of rotation of the input shaft and transmitting it to the drive shaft.

  According to a third aspect of the present invention, the transmission preventing means includes an input shaft side connecting member that rotates based on the rotational force of the input shaft, and a drive shaft side connection that rotates the drive shaft based on the rotation of the input shaft side connecting member. And a torsion coil spring disposed between the connecting members and fitted to a cylindrical portion fixed to the head box, and the torsion coil spring is connected to the input shaft side connection at an end thereof. When a rotational force is applied from the member, the friction with the cylindrical portion is reduced to rotate together with the input shaft side connecting member, and when the rotational force of the drive shaft side connecting member is applied to the end portion, the cylinder The friction with the shaped portion is increased to prevent the drive shaft side connecting member from rotating.

  According to a fourth aspect of the present invention, an input shaft that rotates forward and backward based on the operation of the operating means, a drive shaft that rotates forward and backward based on the rotation of the input shaft, and a shielding material based on the rotation of the drive shaft In the shielding material lifting / lowering device of the solar radiation shielding device including a winding shaft that moves up and down, when the input shaft is rotated forward, the input shaft is connected to the drive shaft, and the input shaft is rotated backward The first transmission means for releasing the connection between the input shaft and the drive shaft, and when the connection between the input shaft and the drive shaft is released, the reverse rotation of the input shaft is accelerated to the drive shaft. A second transmission means for transmitting, wherein the second transmission means is always interposed between the input shaft and the drive shaft, and the input shaft and the drive shaft are connected by the first transmission means. Rotation difference absorbing means for invalidating the speed increasing operation when the vehicle is running.

  According to a fifth aspect of the present invention, the first transmission means includes first and second ratchet members supported so as to be relatively movable in the axial direction between the input shaft and the drive shaft, and positive rotation of the input shaft. And a cam mechanism for meshing the first and second ratchet members and releasing the meshing of the first and second ratchet members based on reverse rotation of the input shaft.

According to a sixth aspect of the present invention, the rotation difference absorbing means is a one-way clutch that transmits only reverse rotation of the input shaft.
In the seventh aspect, the second transmission means includes a first transmission gear that rotates as the input shaft rotates, a second transmission gear that meshes with the first transmission gear, and a rotation of the second transmission gear. A rotation shaft that rotates together with the rotation shaft, a third transmission gear that rotates together with the rotation shaft, and a fourth transmission gear that rotates together with the drive shaft and meshes with the third transmission gear. Increase speed.

According to an eighth aspect of the present invention, any one of the first transmission gear to the fourth transmission gear includes the one-way clutch.
According to a ninth aspect of the present invention, transmission preventing means for preventing rotation of the input shaft due to rotational force acting on the winding shaft based on the weight of the shielding material is interposed between the drive shaft and the input shaft.

According to a tenth aspect of the present invention, the shielding material is lowered based on the reverse rotation of the drive shaft.
In the eleventh aspect, the operation means operates one of the endless operation cords to rotate the input shaft in the normal direction, and operates the other to rotate the input shaft in the reverse direction.

  According to the present invention, there is provided a solar shading device capable of increasing the descending speed of the solar shading material as compared with the ascending speed and reducing the size while making it possible to control the lifting speed and the descending speed of the solar shading material with the operating means. A shield lifting device can be provided.

(First embodiment)
In the horizontal blind shown in FIGS. 1 (a) and 1 (b), a multi-stage slat 3 is suspended and supported as a solar shading material via a plurality of ladder cords 2 suspended from the head box 1. An upper end portion of each ladder cord 2 is supported by a slat angle adjusting device (not shown) disposed in the head box 1, and a lower end is connected to the bottom rail 4.

  In the vicinity of the ladder cord 2, a plurality of lifting cords 5 suspended from the head box 1 are inserted into the slat 3, and the upper end portions of the lifting cords 5 are rotatably supported in the head box 1. It is wound around a winding shaft 11 and its lower end is connected to the bottom rail 4.

  A pulley case 6 is provided at one end of the head box 1, and an endless operation cord 7 is suspended from the pulley case 6. A pulley is rotatably supported in the pulley case 6, and the pulley is rotated forward and backward by operation of the operation cord 7.

  A gear box 12 is disposed inside one end of the head box 1, and a driving force transmission device 9 is disposed adjacent to the gear box 12. When the pulley is rotated, the input shaft 8 of the driving force transmission device 9 is rotated forward and backward through the gear box 12.

  The driving force transmission device 9 rotates the slat drive shaft 14 forward and backward based on forward and reverse rotation of the input shaft 8. The slat drive shaft 14 is fitted on the winding shaft 11. When the slat drive shaft 14 is rotated in the forward direction, the winding shaft 11 is rotated in the winding direction of the lifting / lowering cord 5 so that the lifting / lowering cord 5 is wound around the winding shaft 11. 4 is raised. When the slat drive shaft 14 is rotated in the reverse direction, the winding shaft 11 is rotated in the rewinding direction of the lifting / lowering cord 5 and the slat 3 and the bottom rail 4 are lowered.

  Based on the forward / reverse rotation of the winding shaft 11, the slat angle adjusting device operates in parallel with the raising / lowering operation of the slat 3, and each slat 3 is rotated in the same phase via the ladder cord 2. In addition, after each slat 3 is rotated to a substantially vertical direction, the slat 3 is raised / lowered in a state where further rotation in the same direction is prevented.

The head box 1 is fixed to an attachment surface such as an upper portion of a window via attachment brackets 10 attached to at least both ends thereof.
Next, a specific configuration of the driving force transmission device 9 will be described. As shown in FIG. 2, in the driving force transmission device 9, the support frame 13 is fixed in the head box 1, and the rotation of the input shaft 8 is transferred to the slat drive shaft 14 by the transmission means supported by the support frame 13. Communicated.

  A cylindrical portion 13a is formed on one side of the support frame 13, and the first rotating shaft 20 is rotatably supported by the cylindrical portion 13a. A cylindrical fixing member 19 is non-rotatably fitted to the cylindrical portion 13a, and a first torsion coil spring 17 is fitted to the outer peripheral surface of the fixing member 19. Both end portions 17a and 17b of the first torsion coil spring 17 are bent so as to protrude outward in the radial direction.

  One end of the first rotating shaft 20 is fitted to one side of the second connecting member 18, and the second locking pin 22 is fitted to the first rotating shaft 20 from the outer peripheral surface of the second connecting member 18. Are combined. Accordingly, the second connecting member 18 rotates integrally with the first rotating shaft 20.

  The input shaft 8 is rotatably inserted into the other side of the second connecting member 18, and the input shaft 8 is inserted into a first connecting member 16 that is an input shaft side connecting member. A first locking pin 15 is fitted into the input shaft 8 from the outer peripheral portion of the first connecting member 16 so that the first connecting member 16 rotates integrally with the input shaft 8.

  The end portion of the first connecting member 16 extends to one end between the two end portions 17a and 17b of the first torsion coil spring 17, and the end portion of the second connecting member 18 is also between the both end portions 17a and 17b. It extends to the other side.

  Then, when the first connecting member 16 rotates and comes into contact with both end portions 17a and 17b, the first torsion coil spring 17 is expanded in diameter and rotates idly with respect to the fixing member 19, and the rotational force of the second connecting member 18 is increased. When transmitted to both ends 17a and 17b, the first torsion coil spring 17 is reduced in diameter so that the frictional force with the fixing member 19 increases.

  Accordingly, when the first connecting member 16 is rotated, the first torsion coil spring 17 and the second connecting member 18 are rotated together with the first connecting member 16, and when the first connecting member 16 is not rotated, the second The rotation of the connecting member 18 is blocked and the rotation of the second connecting member 18 is not transmitted to the first connecting member 16.

  The other end portion of the first rotation shaft 20 is fitted to one end portion of the middle shaft 21. An intermediate portion of the intermediate shaft 21 is inserted into a fixed drum 25 fixed to the support frame 13 and is rotatably supported. On the first rotating shaft 20 side from the fixed drum 25, The 1st transmission gear 28 is fitted so that rotation is possible.

  The first transmission gear 28 is formed with a gear portion 28a on one side of a cylindrical portion, and a first cam hole 24 having a long hole shape in the circumferential direction is formed in the cylindrical portion. As shown in FIG. 3, the first cam hole 24 is formed in a range of 180 degrees with respect to the center.

  The first rotation shaft 20, the middle shaft 21, and the third locking pin 23 are inserted into the first rotation shaft 20 through the through hole 27 of the middle shaft 21 from the outer peripheral side of the first transmission gear 28. And the first transmission gear 28 is within a range until the third locking pin 23 comes into contact with either one of the two end portions 24a and 24b of the first cam hole 24. Relative rotation is possible.

A base end portion of a second rotating shaft 26 rotatably supported by the support frame 13 is fitted into the other end portion of the middle shaft 21 so as to be relatively rotatable.
A guide groove 29 shown in FIG. 4 is formed on the outer peripheral surface of the other end of the central shaft 21. The guide groove 29 includes a circumferential groove 29 a that meanders on the outer circumferential surface of the middle shaft 21 at intervals of 180 degrees, and a locking portion 29 b that branches from the circumferential groove 29 a to the other end side of the middle shaft 21. The locking portions 29b are formed at two positions with an interval of 180 degrees with respect to the center, and branch off in a 45-degree direction from the circumferential groove 29a.

  A first ratchet member 30 is supported on the middle shaft 21 so as to be relatively rotatable and movable in the axial direction around the guide groove 29, and the first ratchet member 30 is supported by the guide groove 29. A guide pin 31 protruding inward is formed, and the guide pin 31 moves in the guide groove 29 when the middle shaft 21 and the first ratchet member 30 rotate relative to each other. Accordingly, the guide groove 29 and the guide pin 31 constitute a cam mechanism.

  When the guide pin 31 moves relative to the guide groove 29 in the direction indicated by the arrow H shown in FIG. 4, the guide pin 31 rotates around the rotation groove 29a. When the guide pin 31 moves relative to the arrow I direction, the guide pin 31 moves toward the rotation groove 29a. Is guided into the locking portion 29b.

When the guide pin 31 is guided into the locking portion 29 b, the first ratchet member 30 is moved in the axial direction toward the other end side of the middle shaft 21.
On the first ratchet member 30, ratchet teeth 33 are formed on the side surface on the other end side of the intermediate shaft 21. As shown in FIGS. 5A and 5B, eight ratchet teeth 33 are formed radially at intervals of 45 degrees with respect to the center of the first ratchet member 30.

  As shown in FIGS. 2 and 6, the first ratchet member 30 is fitted with three connecting shafts 32 on the side surface on the other end side of the middle shaft 21, and the tip of the connecting shaft 32 is It is loosely inserted into the annular clutch drum 35. The first ratchet member 30 rotates integrally with the clutch drum 35 and is relatively movable in the axial direction.

  The clutch drum 35 is positioned around the fixed drum 25, and a second torsion coil spring 34 is fitted to the fixed drum 25 between the clutch drum 35 and the fixed drum 25. Yes. One end of the second torsion coil spring 34 is bent radially outward to form an engaging portion 34a.

  On the inner peripheral surface of the clutch drum 35, a clutch groove 36 for allowing the engaging portion 34a of the second torsion coil spring 34 to move relatively is formed within a range of 180 degrees with respect to the center. Engaging ends 36 a and 36 b that engage with the engaging portion 34 a are formed at both ends of the clutch groove 36.

  Then, when the clutch drum 35 is rotated in the direction of arrow J shown in FIG. 6 and the engagement end 36b comes into contact with the engagement portion 34a, the second torsion coil spring 34 is expanded in diameter and the frictional force with the fixed drum. Therefore, the clutch drum 35 can rotate together with the second torsion coil spring 34.

  Further, when the clutch drum 35 is rotated in the direction of the arrow K and the engaging end 36a contacts the engaging portion 34a, the second torsion coil spring 34 is reduced in diameter and the frictional force with the fixed drum increases. The rotation of the clutch drum 35 is prevented. Therefore, the rotation of the clutch drum 35 in the direction of the arrow K is prevented from further rotation with a maximum of 180 degrees at which the engaging portion 34a moves in the clutch groove 36.

  At a position facing the first ratchet member 30, a second ratchet member 38 is fitted to the second rotating shaft 26, and is not relatively rotatable by the fourth locking pin 37 and cannot move in the axial direction. It is fixed to become.

  The second ratchet member 38 is formed with ratchet teeth 39 similar to the ratchet teeth 33 of the first ratchet member 30, and both ratchet teeth 33, 39 face each other. And when the 1st ratchet member 30 moves toward the 2nd ratchet member 38, both ratchet teeth 33 and 39 will mesh | engage and the 1st ratchet member and the 2nd ratchet member 38 will rotate integrally. It has become.

The second ratchet member 38 is formed with a gear portion (fourth transmission gear) 38 a on the back side of the ratchet teeth 39.
A cylindrical portion 13b is formed on the support frame 13 that rotatably supports the second rotation shaft 26, and a support drum 44 is rotatably fitted to the cylindrical portion 13b. And the 5th latching pin 45 is inserted by the 2nd cam hole 46 of the cylindrical part 13b from the outer peripheral side of the support drum 44. As shown in FIG.

  As shown in FIG. 8, the second cam hole 46 is formed in a range of 180 degrees with respect to the center of the cylindrical portion 13b. Accordingly, the support drum 44 can rotate relative to the cylindrical portion 13b in a range of approximately 180 degrees until the fifth locking pin 45 contacts either one of the end portions 46a and 46b of the second cam hole 46. .

  The second rotating shaft 26 passes through the support drum 44, and a third connecting member 41 is fitted to the tip portion thereof. The second rotating shaft 26 and the third connecting member 41 are integrally rotated by the sixth locking pin 40 fitted into the second rotating shaft 26 from the outer peripheral side of the third connecting member 41. .

  A base end of the slat drive shaft 14 in which a fourth connection member 42 that is a drive shaft side connection member is inserted is inserted into the third connection member 41, and a slat drive shaft is inserted from the outer peripheral side of the fourth connection member 42. The fourth connecting member 42 and the slat drive shaft 14 are integrally rotated by the seventh locking pin 47 fitted to the 14.

A third torsion coil spring 43 is fitted on the outer peripheral surface of the support drum 44, and as shown in FIG. 7, both end portions 43a and 43b are bent outward in the radial direction.
One end of the third connecting member 41 is positioned between one end 43 a and 43 b of the third torsion coil spring 43, and one end of the fourth connecting member 42 is the third torsion coil spring 43. Is located on the other side between the end portions 43a and 43b. And when the 3rd connection member 41 presses either end part 43a, 43b, the 3rd torsion coil spring 43 will be diameter-expanded and friction with the support drum 44 will be reduced. Further, when the fourth connecting member 42 presses one of the end portions 43a and 43b, the third torsion coil spring 43 is reduced in diameter so that the friction with the support drum 44 is increased. Therefore, when the second rotating shaft 26 is rotated and the third connecting member 41 is rotated, the fourth connecting member 42 and the slat drive shaft 14 are integrally rotated.

  Further, when the fourth connecting member 42 tries to rotate by the rotational force of the slat drive shaft 14, the frictional force between the third torsion coil spring 43 and the support drum 44 increases, and the fourth connecting member 42 is supported. It tries to rotate integrally with the drum 44. Then, after the slat drive shaft 14 and the fourth connection member 42 are rotated within a range of 180 degrees in which the support drum 44 is allowed to rotate relative to the cylindrical portion 13b, the slat drive shaft 14 and the fourth connection member 42 are rotated. Is prevented from rotating.

  A third rotation shaft 49 is rotatably supported on the support frame 13 below the first rotation shaft 20 and the second rotation shaft 26. A second transmission gear 48 is supported on one side of the third rotation shaft 49 via a one-way clutch 50, and a gear portion 48 a that meshes with the gear portion 28 a of the first transmission gear 28 is formed on the second transmission gear 48. Has been.

The number of teeth of the gear portion 48a is smaller than the number of teeth of the gear portion 28a. Accordingly, the rotational speed of the first transmission gear 28 is increased and transmitted to the second transmission gear 48.
The one-way clutch 50 transmits only rotation in one direction of the second transmission gear 48 to the third rotation shaft 49. That is, the rotation of the second transmission gear 48 is transmitted to the third rotation shaft 49 only when the input shaft 8 is rotated in the slat descending direction.

  A third transmission gear 51 having a gear portion 51 a that meshes with a gear portion 38 a provided on the second ratchet member 38 is attached to the other side of the third rotation shaft 49. The third transmission gear 51 rotates integrally with the third transmission gear 51 by an eighth locking pin 52 fitted to the third rotation shaft 49 from the outer periphery of the shaft portion. The number of teeth of the gear part 51a is formed more than the number of teeth of the gear part 38a.

Accordingly, the rotation of the third rotation shaft 49 is transmitted to the second ratchet member 38 at an increased speed via the third transmission gear 51.
Next, the operation of the driving force transmission device 9 configured as described above will be described.

  First, when the bottom rail 4 and the slat 3 are pulled up, when the input shaft 8 is rotated in the winding direction of the lifting / lowering cord 5 by the operation of the operation cord 7, the first connecting member 16 is connected to the input shaft 8. It is rotated together. Since the first torsion coil spring 17 is enlarged in diameter based on the rotation of the first connecting member 16 and the friction with the fixing member 19 is reduced, the first torsion coil spring 17 and the second connecting member 18 are the first. It is rotated integrally with the connecting member 16.

  The first rotating shaft 20 is rotated with the rotation of the second connecting member 18, and the middle shaft 21 is rotated with the rotation of the first rotating shaft 20. The first transmission gear 28 is rotated integrally with the first rotation shaft 20 after the third locking pin 23 abuts on the end 24 a of the first cam hole 24.

  Therefore, when the input shaft 8 is rotated in the winding direction of the lifting / lowering cord 5, the middle shaft 21 and the first transmission gear 28 are rotated in the same direction and at the same speed. At this time, the second transmission gear 48 meshed with the first transmission gear 28 is rotated, but the rotation in this direction is not transmitted to the third rotation shaft 49 by the one-way clutch 50.

  As the central shaft 21 rotates, the guide groove 29 is rotated, and the guide pin 31 is moved along the guide groove 29. Specifically, when the lifting / lowering cord 5 is wound, the guide groove 29 is moved in the direction of arrow H in FIG. 4, and the guide pin 31 is moved relatively in the direction of arrow I in the guide groove 29. The guide pin 31 is guided from the circumferential groove 29 a into the locking portion 29 b, and the first ratchet member 30 moves toward the second ratchet member 38.

  At this time, the first ratchet member 30 and the clutch drum 35 rotate together with the inner shaft 21 for about 180 degrees after the guide pin 31 comes into contact with the branch portion 29 c of the guide groove 29. Thereafter, some frictional force acts on the clutch drum 35 via the second torsion coil spring 34, and the clutch drum 35 is held without rotating relative to the fixed drum 25.

  Therefore, the first ratchet member 30 does not rotate toward the second ratchet member 38 along the connecting shaft 32 until the guide pin 31 reaches the tip of the locking portion 29b from the branch portion 29c. The ratchet teeth 33 and 39 are engaged with each other. Then, after the guide pin 31 has moved to the tip of the locking portion 29b, the tip of the locking portion 29b is pressed toward the rotation direction of the middle shaft 21, and the rotation of the middle shaft 21 causes the first ratchet member 30 to move. It will be in the state transmitted to the 2nd ratchet member 38 via this.

  Further, when the first ratchet member 30 is rotated, the first ratchet member 30 and the clutch drum 35 are integrally rotated in the direction of arrow J shown in FIG. When the engagement end 36b of the clutch groove 36 comes into contact with the engagement portion 34a of the second torsion coil spring 34, the second torsion coil spring 34 is in a diameter-expanded state. Therefore, the clutch drum 35 can be rotated integrally with the first ratchet member 30 without being prevented from rotating by the second torsion coil spring 34.

  When the second ratchet member 38 is rotated, the third connecting member 41 is rotated via the second rotation shaft 26. Then, with the rotation of the third connecting member 41, the fourth connecting member 42 is rotated, and the slat drive shaft 14 is rotated in the winding direction of the elevating cord 5.

  At this time, since the end surface 41a of the third connecting member 41 abuts on the end 43a of the third torsion coil spring 43 and the diameter thereof is increased, the third torsion coil spring 43 rotates integrally with the third connecting member 41 and the fourth connecting member 42. . Further, the fifth locking pin 45 has an end 46a of the second cam hole 46 (see FIG. 8) due to a slight frictional force between the inner peripheral surface of the third torsion coil spring 43 and the outer peripheral surface of the support drum 44. It will be in the state which contacts.

  Thus, the rotation of the input shaft 8 is transmitted to the slat drive shaft 14 on the same axis, and the rotation in the same direction as the input shaft 8 is transmitted to the slat drive shaft 14 at the same speed. And based on rotation of the slat drive shaft 14, each slat 3 is rotated by the same phase, and the bottom rail 4 and the slat 3 are pulled up.

  In such a slat pulling operation, if the number of teeth of the gear portion 48a of the second transmission gear 48 is ½ of the number of teeth of the gear portion 28a of the first transmission gear 28, the rotation of the second transmission gear 48 will be described. The number is twice that of the first rotation shaft 20.

  Further, if the number of teeth of the gear portion 38a of the second ratchet member 38 is ½ of the number of teeth of the third transmission gear 51, the rotational speed of the third transmission gear 51 is the second ratchet member 38, that is, the first It becomes 1/2 of the coaxial 20 once.

Accordingly, the rotation speed of the second transmission gear 48 and the third rotation shaft 49 is 4: 1, and the rotation direction is the same direction. This rotational difference is absorbed by the one-way clutch 50.
When the operation cord 7 is not operated, a rotational force in the unwinding direction of the lifting / lowering cord 5 acts on the slat drive shaft 14 based on the weight of the bottom rail 4 and the slat 3.

  Based on the rotational force acting on the slat drive shaft 14, a rotational force in the direction of the arrow L shown in FIG. 7 acts on the fourth connecting member 42, and the end surface 42 a of the fourth connecting member 42 has the third torsion coil spring 43. It contacts the end 43a. Then, the diameter of the third torsion coil spring 43 is reduced, the friction with the support drum 44 is increased, and the fourth connecting member 42 tries to rotate integrally with the support drum 44.

  At the end of the lifting operation of the slat 3, the fifth locking pin 45 is in contact with the end 46a of the second cam hole 46, so that the support drum 44 rotates in the direction of arrow O. Accordingly, the rotational force acting on the fourth connecting member 42 is transmitted to the third connecting member 41.

  The rotational force acting on the third connecting member 41 is transmitted to the second ratchet member 38 via the second rotation shaft 26, and is transmitted to the first ratchet member 30 that meshes with the second ratchet member 38.

Then, since the rotational force in the direction of arrow I shown in FIG. 4 acts on the guide pin 31 positioned in the locking portion 29b of the guide groove 29, the rotational force acting on the first ratchet member 30 is the center shaft 21.
Is transmitted to.

  The rotational force acting on the middle shaft 21 is transmitted to the second connecting member 18 via the first rotating shaft 20. Then, the second connecting member 18 comes into contact with the end portion 17b of the first torsion coil spring 17, the diameter of the first torsion coil spring 17 is reduced, and the frictional force with the fixing member 19 increases. Therefore, the rotation of the middle shaft 21 in the rewind direction is prevented, and the rotation of the slat drive shaft 14 in the rewind direction is prevented. As a result, the weight drop of the slat 3 and the bottom rail 4 is prevented.

Next, the operation during the lowering operation of the bottom rail 4 and the slat 3 will be described.
When the input shaft 8 is rotated in the rewinding direction of the lifting / lowering cord 5 based on the operation of the operation cord 7, the first rotation shaft 20 is rotated via the first connecting member 16 and the second connecting member 18. At this time, the first torsion coil spring 17 rotates around the fixing member 19 together with the first connecting member 16 and the second connecting member 18.

  The middle shaft 21 is rotated based on the rotation of the first rotation shaft 20. When the slat 3 is lowered after the slat 3 is lifted, the third locking pin 23 rotates from the state in contact with the end 24a of the first cam hole 24 toward the end 24b. Therefore, the rotation of the first rotation shaft 20 is rotated 180 degrees from the start of rotation, and is transmitted to the first transmission gear 28 after the third locking pin 23 contacts the end 24b of the first cam hole 24. The

  When the lifting operation of the slat 3 is completed, the guide pin 31 is at the tip of the locking portion 29b and the ratchet teeth 33 and the ratchet teeth 39 are engaged. When the middle shaft 21 rotates in the rewinding direction from that state, the guide pin 31 is in a state where a load is applied in the downward direction shown in FIG. 4, so that the guide pin 31 remains in contact with the tip of the locking portion 29b. Therefore, the ratchet teeth 39 and the ratchet teeth 33 cannot be disengaged.

  When the first ratchet member 30 is rotated in the rewind direction via the guide pin 31, the clutch drum 35 attempts to rotate integrally via the connecting shaft 32. At this time, the engagement end 36b of the clutch groove 36 is in contact with the engagement portion 34a, but the clutch drum 35 rotates about 180 degrees in the K direction and the engagement end 36a contacts the engagement portion 34a. Then, the second torsion coil spring 34 is reduced in diameter and integrated with the fixed drum 25.

  Then, the clutch drum 35 can no longer rotate in the rewind direction, and the first ratchet member 30 also cannot rotate, so that the guide pin 31 also cannot rotate. Then, the guide pin 31 starts relative movement along the guide groove 29.

  On the other hand, a rotational force in the unwinding direction of the lifting / lowering cord 5 acts on the fourth connecting member 42 from the slat drive shaft 14. The end face 42a of the fourth connecting member 42 abuts on the end 43a of the third torsion coil spring 43, the diameter of the third torsion coil spring 43 is reduced, and the support drum 44 is subjected to rotational force in the rewinding direction. It is working.

  At the start of rewinding, when the first ratchet member 30 and the second ratchet member 38 are engaged with each other and rotating integrally, in FIG. 7, the end surface 42a abuts on the end portion 43a, and the end portion 43a is the end surface 41a. And rotating in the L direction. That is, following the rotation of the third connecting member 41 in the L direction, the fourth connecting member 42 and the third torsion coil spring 43 are rotated in the L direction.

  At this time, since the third torsion coil spring 43 is reduced in diameter, the third torsion coil spring 43 is rotated together with the support drum 44. Then, from the state where the fifth locking pin 45 is in contact with the end 46a of the second cam hole 46 (the state at the end of the winding operation), the support drum 44 is connected to the third connecting member 41 and the fourth connecting member. It rotates with the member 42 over the range of about 180 degree | times in the rewinding direction (refer FIG. 8).

  At this time, the second ratchet member 38 is rotated in the rewinding direction, and the third rotating shaft 49 is rotated via the gear portions 38a and 51a. This rotation is caused by the action of the one-way clutch 50 and the second transmission gear. 48 is not transmitted.

  As described above, the slat drive shaft 14 follows the rotational movement of the input shaft 8 for about 180 degrees after the input shaft 8 starts to rotate in the rewind direction of the lifting / lowering cord 5, and is the same as the input shaft 8. It is rotated in the rewind direction of the lifting / lowering cord 5 at a speed.

The angle of the slat 3 is adjusted within a range of about 180 degrees by the slat angle adjusting device between about 180 degrees after the input shaft 8 starts to rotate in the rewind direction of the lifting / lowering cord 5.
When the rotation of the input shaft 8 in the rewinding direction exceeds about 180 degrees, the rotation of the first ratchet member 30 stops as described above, so that the guide groove 29 shown in FIG. 4 is moved toward the I direction, The guide pin 31 inserted into the guide groove 29 is moved in the H direction relative to the guide groove 29. The guide pin 31 that moves in the guide groove 29 in the H direction is moved from the locking portion 29b into the circumferential groove 29a. As a result, the first ratchet member 30 is separated from the second ratchet member 38.

Thereafter, the rotation of the first rotation shaft 20 is transmitted to the first transmission gear 28, and the rotation is accelerated by the gear portion 28 a and the gear portion 48 a and transmitted to the second transmission gear 48.
Since the rotation transmitted to the second transmission gear 48 is a rotation in a direction to rewind the lifting / lowering cord 5, the rotation is transmitted to the third rotation shaft 49 via the one-way clutch 50, and the rotation of the third rotation shaft 49 is performed. Is transmitted to the third transmission gear 51.

  The rotation of the third transmission gear 51 is accelerated through the gear portions 51 a and 38 a and is transmitted to the second ratchet member 38. The rotation transmitted to the second ratchet member 38 is transmitted to the second rotation shaft 26, and the rotation of the second rotation shaft 26 is transmitted to the third connecting member 41.

  Further, when the rotation of the input shaft 8 in the rewinding direction exceeds 180 degrees, the fifth locking pin 45 comes into contact with the end 46b of the second cam hole 46, and the support drum 44 cannot be rotated further in the O direction. However, the end surface 41b of the third connecting member 41 abuts on the end portion 43b of the third torsion coil spring 43, and the diameter of the third torsion coil spring 43 is increased.

  Then, the third torsion coil spring 43 can rotate relative to the support drum 44 and is rotated in the L direction together with the fourth connecting member 42. And the slat drive shaft 14 is rotated based on rotation of the 4th connection member 42, and the raising / lowering cord 5 is rewound.

  Thus, the rotation of the input shaft 8 is transmitted at an increased speed by the first transmission gear 28, the second transmission gear 48, the third transmission gear 51, and the second ratchet member 38, so that the slat drive shaft The rotational speed of 14 can be increased from the rotational speed of the input shaft 8.

  As described above, the ratio of the number of teeth of the gear portion 28a of the first transmission gear 28 and the gear portion 48a of the second transmission gear 48 is set to 2: 1, and the gear portion 38a of the second ratchet member 38 and the third transmission gear are set. If the ratio of the number of teeth of the gear portion 51 a of 51 is 1: 2, the rotational speed of the slat drive shaft 14 is increased to four times the rotational speed of the input shaft 8.

  Further, the first transmission gear 28 rotated in the same direction as the input shaft 8 and the second transmission gear 48 are reversely rotated. Then, the third transmission gear 51 rotated in the same direction as the second transmission gear 48 and the second ratchet member 38 are reversely rotated. Therefore, rotation in the same direction as the input shaft 8 is transmitted to the second ratchet member 38, and the slat drive shaft 14 is rotated in the same direction as the input shaft 8.

Further, when the rewinding operation by the operation cord 7 is stopped, the rotation of the input shaft 8 in the rewinding direction is stopped, and the lowering of the bottom rail 4 and the slat 3 is stopped.
A rotational force for rotating the slat drive shaft 14 in the unwinding direction is applied to the slat drive shaft 14 by the weight of the bottom rail 4 and the slat 3, and the rotational force is transmitted to the fourth connecting member 42. ing.

  However, as shown in FIG. 7, when the rotational force in the direction of arrow L acts on the fourth connecting member 42, the third torsion coil spring 43 is brought into a reduced diameter state and integrated with the support drum 44. Accordingly, the bottom rail 4 and the slat 3 are rotated 180 degrees or more in the pulling direction, the fifth locking pin 45 comes into contact with the end 46b of the second cam hole 46, and further unwinding of the support drum 44 is prevented. Therefore, the rotation in the rewinding direction is not transmitted from the fourth connecting member 42 to the third connecting member 41.

As described above, even when the bottom rail 4 and the slat 3 are pulled down, after the operation is stopped, the bottom rail 4 and the slat 3 are suspended and supported at desired positions.
Further, when an excessive rotational force acts on the slat drive shaft 14 in the unwinding direction of the lifting / lowering cord 5, the frictional force between the third torsion coil spring 43 and the support drum 44 is insufficient, The third torsion coil spring 43 may be rotated in the rewind direction.

  In such a case, the rotation transmitted from the fourth connection member 42 to the third connection member 41 is transmitted through the second rotation shaft 26, the second ratchet member 38, and the third transmission gear 51 for the third time. It is transmitted to the moving shaft 49. However, since the third rotation shaft 49 and the second transmission gear 48 are connected via the one-way clutch 50, the third rotation shaft 49 rotates idly with respect to the second transmission gear 48. Accordingly, transmission of rotation from the slat drive shaft 14 side to the input shaft 8 is prevented, and damage to the drive force transmission device 9 is prevented.

With the driving force transmission device 9 configured as described above, the following operational effects can be obtained.
(1) The driving force transmission device 9 can rotate the slat drive shaft 14 at the same speed as the input shaft 8 when the slat 3 is lifted, and can rotate faster than the rotation speed of the input shaft 8 when the slat 3 is lowered. The slat drive shaft 14 can be rotated at a high rotational speed. Therefore, the descending speed of the slat 3 can be increased compared to the pulling speed of the slat 3.
(2) The lowering operation of the slat 3 uses the weight of the slat 3 and the bottom rail 4 by operating the operation cord 7 and rotationally driving the slat drive shaft 14 in the slat lowering direction via the driving force transmission device 9. Can be done without. Therefore, the slat 3 can be lowered at an arbitrary lowering speed by operating the operation code 7.
(3) The driving force transmission device 9 is configured so that the rotation of the slat drive shaft 14 is slower when the bottom rail 4 and the slat 3 are pulled up than when the bottom rail 4 and the slat 3 are lowered. Therefore, the driving force transmission device 9 can rotate the slat drive shaft 14 with a stronger torque when the bottom rail 4 and the slat 3 are pulled up than when the bottom rail 4 and the slat 3 are pulled down. Therefore, the operator can pull up the bottom rail 4 and the slat 3 with a small operating force.
(4) Due to the first cam hole 24 formed in the first transmission gear 28, the rotation of the input shaft 8 in the rewinding direction of the lifting / lowering cord 5 causes the third locking pin 23 to contact the end 24b of the first cam hole 24. It is not transmitted to the first transmission gear 28 until it comes into contact. Further, the clutch groove 36 formed in the clutch drum 35 causes the clutch drum 35 to rotate in the rewind direction until the engagement end 36a of the clutch groove 36 contacts the engagement portion 34a of the second torsion coil spring 34. I can't interfere. Further, since the second cam hole 46 is formed in the tubular portion 13b, the fourth connecting member 42 in the rewinding direction until the fifth locking pin 45 contacts the end portion 46b of the second cam hole 46. The rotation is not hindered. Accordingly, the first ratchet member 30 and the second ratchet member 38 are rewound by a load from the lifting / lowering cord 5 for 180 degrees in a state where the first ratchet member 30 and the second ratchet member 38 are engaged.

  With this configuration, when the slat drive shaft 14 is rotated in the rewind direction of the lifting / lowering cord 5 after the slat 3 is pulled up, the slat drive shaft 14 is rotated until the slat drive shaft 14 is rotated 180 degrees. Does not increase speed.

Therefore, when the angle adjustment of the slat 3 is performed by rotating the slat drive shaft 14 in the rewinding direction of the lifting / lowering cord 5 after the lifting operation of the slat 3, the adjustment of the angle of the slat 3 becomes easy. Further, it is possible to prevent the generation of noise due to a sudden change in the angle of the slat 3 at the start of the lowering operation of the slat 3.
(5) The first ratchet member 30 and the second ratchet member 38 are disposed on the same axis as the input shaft 8 and the slat drive shaft 14. Therefore, an increase in the radial dimension of the driving force transmission device 9 can be suppressed.
(6) Since the rotation direction of the input shaft 8 and the slat drive shaft 14 can always be the same direction, the driving force transmission device 9 is interposed on the shielding material drive shaft of the solar shading device other than the horizontal blind as described above. By doing so, it is possible to easily realize a shielding material lifting apparatus capable of increasing the descending speed of the shielding material.
(Second embodiment)
9 to 12 show a second embodiment. This embodiment shows a driving force transmission device for use in a lifting device such as a roll blind or a shutter, and only the parts different from the first embodiment will be described.

  The input shaft 8 is directly connected to the output shaft 62 of the motor 61, and the input shaft 8 becomes the first rotating shaft 20 of the first embodiment. The motor 61 is configured to have a braking function for preventing the output shaft 62 from rotating due to the rotational force acting on the input shaft 8 when the operation is stopped.

That is, due to the action of the motor 61, the first connecting member 16, the first torsion coil spring 17, the second connecting member 18, the fixing member 19 and the like of the first embodiment are not necessary.
The rotation of the driving force transmission shaft 63 corresponding to the slat drive shaft 14 of the first embodiment is transmitted to the winding shaft 65 via the first and second gears 64a and 64b. The screen of the roll blind or the slat of the shutter is moved up and down by the winding shaft 65.

  When the lowering operation is started after the screen or slat pulling operation, the roll blind and the shutter need not be maintained at a low lowering speed within a range of 180 degrees, and may be configured to increase and lower from the beginning.

  Therefore, as shown in FIG. 10, the clutch drum 35 may be configured to always engage with the engaging portion 34a of the second torsion coil spring 34 without providing a clutch groove. Further, as shown in FIG. 11, the support drum 44 may be integrated with the support frame 13.

  Further, as shown in FIG. 12, the first cam hole 24 may be formed in an angle required for moving the guide pin 31 from the circumferential groove 29a into the locking portion 29b, that is, in a range of about 45 degrees.

  With such a configuration, it is possible to obtain the same operational effects as those of the first embodiment. The driving force transmission device of this embodiment can also be used as a lifting curtain or pleated curtain lifting device.

You may implement the said embodiment in the following aspects.
In the first embodiment, the first cam hole 24, the clutch groove 36, and the second cam hole 46 are limited to 180 degrees as long as they can rotate the slat 3 to the maximum extent. is not.
In the first embodiment, the solar shading device is a horizontal blind. However, the solar shading device is used for a solar shading device that rotates the winding shaft 11 in both directions to raise and lower the solar shading material, such as a scooping curtain or a pleated curtain. You can also.
A one-way clutch that operates as described above may be interposed between the first transmission gear 28 and the center shaft 21.
A one-way clutch that operates as described above may be interposed between the third transmission gear 51 and the third rotation shaft 49.
The one-way clutch that operates as described above may be interposed between the second ratchet member 38 and the second rotating shaft 26.
-The third rotation shaft 49 may be divided into two, and a one-way clutch that operates as described above may be interposed therebetween.

Next, technical ideas that can be grasped from the above embodiments will be described below together with the effects thereof.
(A) The cam mechanism includes a guide groove formed along a circumferential direction of a central shaft disposed on the same axis as the input shaft, and is attached to the first ratchet member along the guide groove. 6. The elevating / lowering device for solar radiation shielding material according to claim 5, wherein the elevating device is constituted by a guide pin that moves. According to this configuration, the first ratchet member can be moved on the same axis of the input shaft and can be engaged with the second ratchet member. Accordingly, the first ratchet member and the second ratchet member can be engaged with each other on the same axis line of the input shaft, and an increase in the radial dimension of the input shaft of the lifting device can be suppressed.

(A) is a front view of a horizontal blind, (b) is a top view. It is sectional drawing of the driving force transmission apparatus of 1st embodiment. It is an AA line sectional view of a driving force transmission device. It is explanatory drawing of a guide groove. (A) is CC sectional view taken on the line of a driving force transmission device, (b) is a development view of ratchet teeth. It is a BB line sectional view of a driving force transmission device. It is the EE sectional view taken on the line of a driving force transmission device. It is DD sectional view taken on the line of a driving force transmission apparatus. It is sectional drawing of the driving force transmission apparatus of 2nd embodiment. It is sectional drawing of a driving force transmission apparatus. It is sectional drawing of a driving force transmission apparatus. It is sectional drawing of a driving force transmission apparatus.

Explanation of symbols

1 Head box 3 Shielding material (slats)
7 Operation means (operation code)
8 Input shaft 11, 65 Winding shaft 14 Drive shaft (slat drive shaft)
21 Middle shaft 30, 38 First transmission means (first and second ratchet members)
28, 48, 51, 38 Second transmission means (first to third transmission gears, second ratchet member)
17, 43 Transmission blocking means (first and third torsion coil springs)
50 Rotation difference absorbing means (one-way clutch)

Claims (11)

An input shaft that rotates forward and backward based on the operation of the operating means;
A drive shaft that rotates forward and backward based on the rotation of the input shaft;
In the solar radiation shielding device provided in the head box with a winding shaft for raising and lowering the shielding material based on the rotation of the drive shaft,
Transmission means for transmitting the rotation of the input shaft in the descending direction of the shielding material to the drive shaft at a higher speed than the rotation in the shielding material ascending direction;
A solar radiation shielding device, comprising: transmission preventing means for preventing rotation of the input shaft by rotational force acting on the winding shaft based on the weight of the shielding material. The transmission means includes
When the input shaft is rotated in the shielding material lifting direction, the input shaft and the drive shaft are directly connected. When the input shaft is rotated in the shielding material descending direction, the input shaft and the drive shaft are directly connected. A first transmission means for releasing the state;
Second transmission means for accelerating the rotation of the input shaft and transmitting it to the drive shaft after releasing the direct connection state between the input shaft and the drive shaft when the input shaft is rotated in the shielding material descending direction The solar radiation shielding apparatus according to claim 1, comprising: The transmission blocking means is
An input shaft side coupling member that rotates based on the rotational force of the input shaft;
A drive shaft side connecting member that rotates the drive shaft based on rotation of the input shaft side connecting member;
A torsion coil spring disposed between the connecting members and fitted to a cylindrical portion fixed to the head box;
When the rotational force is applied to the end portion of the torsion coil spring from the input shaft side connecting member, the torsion coil spring rotates with the input shaft side connecting member while reducing friction with the cylindrical portion, and 3. The solar radiation shielding device according to claim 1, wherein when a rotational force of the drive shaft side connecting member is applied, friction with the cylindrical portion is increased to prevent rotation of the drive shaft side connecting member. . An input shaft that rotates forward and backward based on the operation of the operating means;
A drive shaft that rotates forward and backward based on the rotation of the input shaft;
In the shielding material elevating device of the solar radiation shielding device comprising a winding shaft for elevating and lowering the shielding material based on the rotation of the drive shaft,
First transmission means for connecting the input shaft and the drive shaft when the input shaft is rotated forward, and for releasing the connection between the input shaft and the drive shaft when the input shaft is rotated reversely; ,
A second transmission means for increasing the reverse rotation of the input shaft and transmitting it to the drive shaft when the connection between the input shaft and the drive shaft is released;
The second transmission means is always interposed between the input shaft and the drive shaft, and rotates to invalidate the speed increasing operation when the input shaft and the drive shaft are connected by the first transmission means. A shielding material lifting / lowering device for a solar radiation shielding device, comprising a difference absorbing means. The first transmission means is
First and second ratchet members supported so as to be capable of relative movement in the axial direction between the input shaft and the drive shaft;
A cam mechanism that meshes the first and second ratchet members based on the forward rotation of the input shaft and releases the meshing of the first and second ratchet members based on the reverse rotation of the input shaft; The shielding material raising / lowering device of the solar radiation shielding apparatus of Claim 4 provided.   6. The shielding material lifting / lowering device for a solar radiation shielding device according to claim 4, wherein the rotation difference absorbing means is a one-way clutch that transmits only the reverse rotation of the input shaft. The second transmission means is
A first transmission gear that rotates as the input shaft rotates;
A second transmission gear meshing with the first transmission gear;
A rotating shaft that rotates as the second transmission gear rotates;
A third transmission gear that rotates with the pivot shaft;
7. The solar radiation according to claim 4, wherein the rotation of the input shaft is accelerated by a fourth transmission gear that rotates with the drive shaft and meshes with the third transmission gear. 8. Shielding material lifting device for shielding device.   8. The shielding material lifting / lowering device for a solar radiation shielding device according to claim 7, wherein any one of the first transmission gear to the fourth transmission gear includes the one-way clutch.   The transmission blocking means for blocking the rotation of the input shaft due to the rotational force acting on the winding shaft based on the weight of the shielding material is interposed between the drive shaft and the input shaft. The shielding material raising / lowering device of the solar radiation shielding apparatus of any one of 4 thru | or 8.   The shielding material lifting / lowering device for a solar radiation shielding device according to any one of claims 4 to 9, wherein the shielding material is lowered based on reverse rotation of the drive shaft.   11. The operation means according to claim 1, wherein one of the endless operation cords is operated to rotate the input shaft forward, and the other is operated to reversely rotate the input shaft. The shielding material raising / lowering device of the solar radiation shielding apparatus as described in a term.

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