JP2000145328A - Shielding material lifting equipment for insolation shielding equipment and slat drive equipment for lateral blind - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a shielding material lifting equipment for insolation shielding equipment capable of simplifying the lifting operation for the shielding material and of reducing the operating force required for the lifting operation. SOLUTION: A shielding material descending operation by a shielding material lifting equipment 7 is performed by cam means 18, 20 which permit to move a cam shaft 14 by the operation of operation means 6 in the rotation axis direction while rotating the cam shaft 14 and permit to retain the cam shaft 14 in its moving position in a state of releasing the operation means 6 and a clutch device 24 which releases the interlocked state as the cam shaft 14 moves and makes a lifting shaft 36 freely rotatable which drives the lifting cord winding device based on the weight of the shielding material.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an elevating device for elevating and lowering a solar shading material such as a slat of a horizontal blind, a curtain for a tuck-up curtain or a curtain fabric of a pleated curtain.

[0002]

2. Description of the Related Art Conventionally, as one type of a horizontal blind,
In order to easily and quickly perform the slat elevating operation and the angle adjusting operation, the slat elevating operation and the angle adjusting operation are performed by operating a common operation code or a common operation rod that is hung from one end of the head box. Some have made it possible.

In the horizontal blind disclosed in Japanese Patent Application Laid-Open No. 4-269293, the angle of the slat can be adjusted by rotating an operating rod suspended from one end of a head box. When the operation rod is further rotated, the slat can be moved up and down. Further, when the operation rod is pulled downward, the operation of the clutch device that operates as the self-weight drop prevention device is released, and the slat can be lowered by its own weight.

[0004] With such an operation, the slat angle adjustment operation and the elevation operation can be performed by operating the common operation rod. In particular, the slat can be lowered by its own weight by pulling the operation rod downward. The slat can be lowered without rotating the operation rod.

[0005] In the horizontal blind disclosed in Japanese Patent Application Laid-Open No. 5-302482, the angle of the slat can be adjusted by operating an operation code suspended from one end of the head box. When the operation code is further operated, the slat can be moved up and down. Further, when the pulley case is tilted by pulling the operation cord diagonally downward, the operation of the clutch device that operates as the self-weight drop prevention device is released, and the slat can be lowered by its own weight.

[0006] By such an operation, the slat angle adjustment operation and the elevating operation can be performed by operating the common operation code. In particular, the slat can be lowered by its own weight by tilting the pulley case. It is possible to lower the slat without repeatedly operating the operation code.

In the blind lifting device described in Japanese Utility Model Publication No. Sho 62-37918, if the driving shaft is rotated in the slat rising direction, the lifting shaft is rotated in the slat rising direction, and the driving shaft is rotated in the slat falling direction. Then, the elevating shaft can freely rotate, so that the slat descends by its own weight.

[0008]

Problems to be Solved by the Invention Japanese Patent Application Laid-Open No. 4-26929
In the horizontal blind disclosed in Japanese Patent Publication No. 3 (1990), the operating rod is rotated in the slat pulling direction while the torsion coil spring constituting the clutch device is pressed in the direction in which the frictional force is reduced when the slat is pulled up. There is a need.

Therefore, at the time of raising the slat, an operation force for reducing the frictional force of the torsion coil spring is required in addition to the operation force for raising the slat, and the operation force required for the pulling operation is increased. There is a problem.

If the urging force of the torsion coil spring is set small in order to reduce the operation force required for the pulling operation, there is a possibility that a sufficient self-weight drop prevention function cannot be secured.

In the horizontal blind disclosed in Japanese Patent Application Laid-Open No. 5-302482, in order to lower the slat by its own weight, it is necessary to pull the operation code obliquely downward, and the operation is complicated.

In the blind lifting and lowering device described in Japanese Utility Model Publication No. Sho 62-37918, in order to lower the slats, the drive shaft is rotated against the urging force of the spring, and the lift shaft is rotatable. It is necessary to maintain this state until the slat lowering operation is completed.

Therefore, when lowering the slat to the lowermost limit, it is necessary to hold the elevating shaft in a rotatable state until the lowering of the slat is completed, so that the lowering operation becomes complicated.

An object of the present invention is to provide a slat drive device for a horizontal blind which can easily perform a slat elevating operation and further reduce the operating force required for the elevating operation.

[0015]

According to a first aspect of the present invention, a shielding material is suspended and supported by a lifting cord suspended from a lifting cord winding device in a head box, and operating means is suspended from the head box. In the box, based on the operation of the operating means, the lifting / lowering cord winding device is driven to pull up the shielding material, prevent the weight of the shielding material from falling, and prevent the weight from falling. In a solar shading device provided with a shielding material elevating device that performs a shielding material lowering operation due to its own weight, the shielding material lowering operation by the shielding material elevating device is performed in the rotation axis direction while rotating the cam shaft by operating the operation means. While moving, the cam means capable of holding the cam shaft at the moving position with the operating means released, and disengaged with the movement of the cam shaft, Serial performing elevating shaft for driving the lift cord winding device with a clutch device for rotatable based on the weight of the shielding material.

According to a second aspect of the present invention, the cam means comprises: a slide ball supported by the case of the shielding member elevating device so as to be immovable in a rotation direction of the cam shaft; A guide groove for continuously guiding the slide ball in the circumferential direction of the cam shaft, wherein the guide groove is configured to move the cam shaft in the axial direction when the operating means rotates the cam shaft in a direction of pulling up the shielding member. A first groove that rotates without moving, and a second groove that moves the cam shaft in the rotation axis direction in the rotation of the cam shaft in the shielding material lowering direction to release the engagement of the clutch device. Configured.

According to a third aspect of the present invention, the clutch device comprises a first clutch device which moves in the axial direction together with the camshaft, and a second clutch device which is connected to the elevating shaft. The clutch device is provided with a self-weight drop prevention device that prevents only the rotation of the first clutch device in the shielding member lowering direction.

According to a fourth aspect of the present invention, a one-way cam is provided between the camshaft and the first clutch device for transmitting only a rotational force in the shielding member pulling-up direction to the first clutch device.

According to a fifth aspect of the present invention, the self-weight drop prevention device includes:
A clutch ring that rotates integrally with the first clutch device, a locking portion formed in the case around the clutch ring, and a clutch ball housed in the locking portion; The part engages the clutch ball with the clutch ring to prevent the rotation only when the clutch ring rotates in the shielding member lowering direction.

According to a sixth aspect of the present invention, the clutch device comprises the camshaft and a second clutch device connected to the elevating shaft, and a fitting shaft that rotationally drives the camshaft includes:
A self-weight descent prevention device is provided for preventing the fitting shaft from rotating in the shielding member descent direction based on the rotational force acting on the cam shaft from the elevating shaft via the second clutch device.

According to a seventh aspect of the present invention, the self-weight drop prevention device includes:
A stop ring case fixed to the case of the shielding member elevating device around the fitting shaft, and a stop ring case is provided between the stop ring case and the fitting shaft, and the fitting based on the operation of the operation code is performed. A stop ring that permits rotation of the shaft, and prevents rotation of the fitting shaft in the shielding material descending direction based on the rotational force transmitted from the elevating shaft to the cam shaft by frictional force with the stop ring case. .

According to the present invention, the second groove overlaps the first groove at a predetermined rotation angle within a range of one rotation of the camshaft. In the ninth aspect, the first groove has an axial direction such that the slide ball is guided from the first groove to the second groove when the camshaft rotates in the shielding member lowering direction. The slide ball is provided with a long groove-shaped concave portion that supports the slide ball passing through the bent portion movably in the rotation axis direction when the cam shaft rotates in the shielding material pulling direction. It was supported by the case of the material lifting device.

According to a tenth aspect, the ladder cord suspended from the ladder cord supporting device in the head box supports a plurality of slats, and the elevating cord suspended from the elevating cord winding device in the head box is provided. A bottom rail is connected to the lower end of the elevating cord while being inserted into the slat, and the head box is provided with common driving means for performing a slat elevating operation and an angle adjusting operation. Based on the operation of the means, the ladder cord supporting device is driven via an angle adjusting shaft, and the elevating cord winding device is driven via an elevating shaft, so that the slat lifting operation and the slat lifting at a desired position. A slat for lowering its own weight to prevent lowering, a slat lowering operation by its own weight, and an angle adjusting operation of the slat. In a horizontal blind provided with a slot driving device, the slat lowering operation by the slat driving device engages with a cam shaft that moves in the rotation axis direction while rotating by the operation of the driving means, and moves along with the movement of the cam shaft. The state is released, and the lifting and lowering shaft for driving the lifting and lowering cord winding device is rotated by a clutch device based on the weight of the slat.

According to a twelfth aspect of the present invention, the slat driving device includes an elevating drive unit that drives the elevating cord winding device based on rotation of an input shaft that is rotationally driven by the driving means, and the ladder cord support device. And an angle adjustment drive unit for driving, between the input shaft and the elevation drive unit,
A rotation transmission device is provided for transmitting the rotation of the input shaft to the elevation drive unit when the rotation of the input shaft exceeds the rotation range of the input shaft where the angle adjustment operation of the slat is performed by the angle adjustment drive unit.

According to a twelfth aspect of the present invention, the ladder cord suspended from the ladder cord support device in the head box supports a plurality of slats, and the elevating cord suspended from the elevating cord winding device in the head box is provided. A bottom rail is connected to the lower end of the elevating cord while being inserted into the slat, and the head box is provided with common driving means for performing a slat elevating operation and an angle adjusting operation. Based on the operation of the means, while driving the ladder cord support device via an angle adjusting shaft, and driving the elevating cord winding device via an elevating shaft, a slat lifting operation, and a slat angle adjusting operation. In a horizontal blind provided with a slat driving device for performing the driving, the slat driving device is rotated by the driving means. Based on the rotation of the driven input shaft, provided with an elevating drive unit that drives the elevating cord winding device, and an angle adjustment driving unit that drives the ladder code support device, and the input shaft and the elevating drive unit In between, a rotation transmission device is provided for transmitting the rotation of the input shaft to the elevation drive unit when the rotation of the input shaft exceeds the rotation range of the input shaft where the slat angle adjustment operation is performed by the angle adjustment drive unit.

[0026]

DESCRIPTION OF THE PREFERRED EMBODIMENTS (First Embodiment) A first embodiment of the present invention will be described below with reference to the drawings. The horizontal blind shown in FIG.
A plurality of slats 3 are suspended from and supported via a plurality of ladder cords 2, and a bottom rail 4 is connected to a lower end of the ladder cord 2.

A plurality of lifting cords 5 hanging from the head box 1 penetrate through the slat 3, and the bottom rail 4 is connected to a lower end of the lifting cord 5. The upper end of the lifting cord 5 is wound around a lifting cord winding device in the head box 1.

An endless operation code 6 is hung from one end of the head box 1, and the operation of the operation code 6 causes a slat drive device disposed in the head box 1 to operate. Then, based on the operation of the slat drive device, a lifting operation of the slat 3 or an angle adjusting operation of the slat 3 is performed.

The specific configuration of the slat driving device 7 provided in the head box 1 will be described. As shown in FIG. 2, one side of the head box 1 has an upper case 8a of the slat driving device 7 as shown in FIG. , The lower case 8b and the case cover 8c are arranged in a state where they are fitted to each other.

The input shaft 9 is rotatably supported by the bearing 17a of the case cover 8c. A pulley 10 is fitted to the base end of the input shaft 9 outside the case cover 8c. The operation code 6 is mounted on the pulley 10, and the input shaft 9 is rotated via the pulley 10 by operating the operation code 6.

A gear is engraved on the base end of the input shaft 9 and a drive gear 11 is provided on the base end of the case cover 8c.
Are rotatably supported. When the input shaft 9 is rotated, the drive gear 11 is rotated via the transmission gear supported on the case cover 8c.

At the center of the drive gear 11, a transmission shaft 1
The two base ends are fitted. Therefore, the rotation of the input shaft 9 is reduced at a predetermined reduction ratio and transmitted to the transmission shaft 12.

In the bearing 17b of the upper case 8a,
The fitting shaft 13 is rotatably supported, and the base end of the fitting shaft 13 is relatively rotatably fitted to the distal end of the input shaft 9, and the distal end of the fitting shaft 13 has a square shaft shape. Formed
The camshaft 14 is fitted into a square hole 15 formed at the center of the base end side. Accordingly, the cam shaft 14 rotates integrally with the fitting shaft 13 and is supported so as to be movable in the axial direction with respect to the fitting shaft 13.

A planetary gear mechanism is interposed between the input shaft 9 and the fitting shaft 13, and the rotation of the input shaft 9 is reduced at a predetermined reduction ratio and transmitted to the fitting shaft 13. In addition, fitting shaft 1
3 engages with the carrier of the planetary gear mechanism, and after the carrier is rotated by a predetermined angle based on the rotation of the input shaft, that is, after the transmission shaft 12 is rotated by the predetermined angle and the slat 3 is rotated substantially vertically, It is designed to rotate with the carrier.

A coil spring 16 is disposed between the bearing 17b of the upper case 8a and the base end surface of the cam shaft 14. The camshaft 14 is urged away from the bearing 17b by the urging force of the coil spring 16 with the bearing 17b as a fulcrum.

An outer peripheral surface of a base end portion of the cam shaft 14 is located near an inner surface of the lower case 8b, and a guide groove 18 having a semicircular cross section is formed on the outer peripheral surface so as to be continuous in the circumferential direction. I have.

A concave portion 19 is formed on the inner surface of the lower case 8b facing the cam shaft 14, and a slide ball 20 is provided between the concave portion 19 and the guide groove 18. The recess 19 is formed in a long groove shape in the axial direction of the camshaft 14. Accordingly, when the camshaft 14 is rotated, the slide ball 20 moves in the guide groove 18 and also moves in the recess 19.

FIG. 4 is a development view of the guide groove 18.
That is, the guide groove 18 branches from the first groove 18a that is continuous on the peripheral surface of the cam shaft 14 to the distal end side of the cam shaft 14 from the bent portion 18c of the first groove 18a, and passes through a predetermined angle to the converging portion 18d. And a second groove 18b converging in a direction perpendicular to the first groove 18a. The first and second grooves 18a and 18b are formed on the peripheral surface of the cam shaft 14 for two periods.

The bent portion 18c is formed at a branch portion between the first groove 18a and the second groove 18b so as to be bent toward the second groove 18b. When the camshaft 14 configured as described above is rotated in the slat pulling direction by the fitting shaft 13, the slide ball 20 moves in the direction of arrow A relative to the guide groove 18 in FIG. Then, the slide ball 2 is driven by the urging force of the coil spring 16.
0 moves in the first groove 18a.

When the slide ball 20 passes through the bent portion 18c, the cam shaft 14 is not moved in the axial direction because the recess 19 allows the slide ball 20 to move.

When the cam shaft 14 is rotated by the fitting shaft 13 in the slat pull-down direction, the slide ball 20 moves in the direction of arrow B relative to the guide groove 18. Then, the slide ball 20 moves from the first groove 18a to the bent portion 18c.
Through the second groove 18b.
To return to the first groove 18a via

At this time, the slide ball 20 is
b, the camshaft 14 is driven by the coil spring 1
6 moves in the direction of arrow C shown in FIG. In addition, the slide ball 20 is moved to the converging portion 1 of the second groove 18b.
When the rotation reaches 8d, further rotation of the cam shaft 14 in the same direction is prevented. In this state, when the operation cord 6 is released, the slide ball 20 is moved from the converging portion 18d by the urging force of the coil spring 16 to the first position. It returns into the groove 18a.

As shown in FIG. 3, a one-way cam 21 is fitted to an intermediate portion of the cam shaft 14 so as to be relatively non-rotatable and movable in the axial direction. A coil spring 22 is provided between the cam shaft 14 and the side surface on the base end side of the one-way cam 21, and the one-way cam 21 is moved by the urging force of the coil spring 22 with the cam shaft 14 as a fulcrum. It is urged toward the distal end. Further, ratchet teeth 23 constituting a one-way clutch are formed on the side surface on the tip side of the one-way cam 21.

A first clutch plate 24 is rotatably supported at the tip of the camshaft 14, and the camshaft 1
The camshaft 14 is formed by the E-ring 25 fitted to the tip of the camshaft 14.
Are supported so as to be relatively immovable in the axial direction. Therefore, when the camshaft 14 moves in the axial direction, the first clutch plate 24 moves integrally with the camshaft 14.

A ratchet tooth 26 meshing with the ratchet teeth 23 of the one-way cam 21 is formed on the side face on the base end side of the first clutch plate 24. Then, the ratchet teeth 23 are generated by the urging force of the coil spring 22.
Are urged toward the ratchet teeth 26 so that the two ratchet teeth 23 and 26 are in mesh with each other.

When the one-way cam 21 is rotated in the slat pull-up direction, the ratchet teeth 23 and 26 mesh with each other to rotate the first clutch plate 24 integrally with the one-way cam 21 and rotate in the slat pull-down direction. In this case, the one-way cam 21 idles with respect to the first clutch plate 24. During this idling operation, the ratchet teeth 23 rotate while riding over the ratchet teeth 26, so that the one-way cam 21 reciprocates in the axial direction against the urging force of the coil spring 22.

Around the first clutch plate 24, a clutch ring 28 is provided. As shown in FIG. 5, a plurality of recesses 27 extending in the axial direction are formed on the outer peripheral surface of the first clutch plate 24 at equal intervals in the circumferential direction. A ridge 29 is formed which engages the ridge 27. Therefore, the clutch ring 28 is supported so as not to rotate relative to the first clutch plate 24 and to be movable in the axial direction. On the outer peripheral surface of the clutch ring 28, irregularities having a corrugated cross section are continuously formed as cams 30.

The upper case 8a and the lower case 8b located around the clutch ring 28 are located close to the outer peripheral edge of the clutch ring 28, and one side of the lower case 8b is connected to the outer peripheral edge of the clutch ring 28. The locking portion 31 is formed by increasing the interval upward.

The engaging portion 31 accommodates a clutch ball 32. When the clutch ring 28 is rotated in the slat-pulling direction, that is, in the direction of arrow D in FIG. To be repeatedly lifted. Therefore, the clutch ring 28 is freely rotated in the direction of arrow D with respect to the lower case 8b.

When the clutch ring 28 is rotated in the slat pulling-down direction, that is, in the direction of arrow E in FIG. 5, the clutch ball 32 is sandwiched between the cam 30 and the engaging portion 31 and the clutch ball 28 is moved in the same direction. Prevent further rotation to Therefore, after the clutch ball 32 is sandwiched between the cam 30 and the locking portion 31, the clutch ring 28 cannot rotate in the direction of arrow E.

On the side of the first clutch plate 24 on the tip side, teeth 33 extending in the tip direction are formed at regular intervals in the circumferential direction. The second clutch plate 3 is provided in the lower case 8b.
4 is rotatably supported. The second clutch plate 34 has teeth 35 meshing with the teeth 33 formed on the side surface on the base end side, and an elevating shaft 36 for driving the elevating cord winding device is fitted to the distal end. ing.

Therefore, the first and second clutch plates 24,
When the first clutch plate 24 is rotated in a state where the teeth 33 and 35 of 34 are engaged, the elevating shaft 36 is rotated via the second clutch plate 34.

The elevating cord winding device is driven based on the rotation of the elevating shaft 36. Then, based on the rotation of the elevating shaft 36 in the slat lifting direction, the elevating cord 5 is spirally wound around the elevating cord winding device, and based on the rotation of the elevating shaft 36 in the slat descending direction, the elevating cord 5 is raised and lowered. It is rewound from the cord winder.

A rotational force based on the weight of the slat 3 acts on the elevating shaft 36 via an elevating cord winding device. When the first and second clutch plates 24 and 34 are engaged with each other and a rotational force based on the weight of the slat 3 is transmitted to the first clutch plate 24, the clutch ring 28 is moved in the direction of arrow E shown in FIG. However, the rotation of the clutch ring 28 in the same direction is prevented by the operation of the clutch ball 32, so that the slat 3 is prevented from descending under its own weight.

Also, the cam shaft 14 moves in the direction of arrow C shown in FIG. 2, the first clutch plate 24 moves in the same direction together with the cam shaft 14, and the teeth 33 of the first clutch plate 24 When the clutch plate 34 is disengaged from the teeth 35, the second clutch plate 34 can freely rotate, so that the slat 3 descends by its own weight.

Above the second clutch plate 34, a case 38 of a tilt clutch 37 is supported on the upper edge of the lower case 8b, and the case 38 has first and second clutch shafts 39, The base end of the forty is rotatably supported. The transmission shaft 12 is fitted to the base end of the first clutch shaft 39.

As shown in FIG. 6, the case 38 is formed in a substantially cylindrical shape, and has a hemispherical concave portion 41 on its inner peripheral surface.
Are formed. The second clutch shaft 40 is rotatably supported in a state in which its outer peripheral surface is close to the inner peripheral surface of the case 38, and has a semicircular guide groove 4
2 are formed in the circumferential direction.

In the development view shown in FIG. 7, the guide groove 42 has an intermediate portion extending linearly in the circumferential direction, and
2a is symmetrically bent toward the first clutch shaft 39 side. The recess 41 and the guide groove 42
And a slide ball 43 is disposed between them.

A coil spring 44 is disposed between the second clutch shaft 40 and the case 38,
The second clutch shaft 40 is urged toward the first clutch shaft 39 by the urging force of the coil spring 44 having the fulcrum as a fulcrum.

At the tip of the second clutch shaft 40,
A cylindrical portion 45 that opens toward the distal end is formed, and the cylindrical portion 45 is formed so that the diameter gradually increases toward the distal end.

The first clutch shaft 39 has a tip portion corresponding to the cylindrical portion 45 of the second clutch shaft 40,
It is formed in the shape of a truncated cone whose diameter is gradually reduced toward the tip,
A plurality of recesses 46 extending in the axial direction are formed on the outer peripheral surface at equal intervals in the circumferential direction.

As shown in FIG. 8, the recess 46 is formed so as to gradually become deeper toward the center in the circumferential direction, and needle rollers 47 are provided in the recess 46, respectively.

The first clutch shaft 39 is rotatably supported by the case 38 with its tip inserted into the cylindrical portion 45 of the second clutch shaft 40. Then, in a state where the slide ball 43 is located at the intermediate portion of the guide groove 42, as shown in FIG. 6, the inner peripheral surface of the cylindrical portion 45 of the second clutch shaft 40 and the concave portion 46 of the first clutch shaft 39 are formed. The needle roller 47 is pinched between the first and second clutch shafts 39 and 40 based on the rotation of the transmission shaft 12.

When the slide ball 43 moves to one of the two ends 42a of the guide groove 42 based on the rotation of the second clutch shaft 40, as shown in FIG. It moves in a direction away from one clutch shaft 39.

Then, the needle roller 47 is
And the first clutch shaft 39 idles with respect to the second clutch shaft 40. Therefore, in this state, the rotation of the transmission shaft 13 is not transmitted to the second clutch shaft 40.

At the base end of the second clutch shaft 40,
One end of the angle adjusting shaft 48 is fitted, and the angle adjusting shaft 48
The angle of the slat 3 is adjusted via the ladder cord support device and the ladder cord 2 based on the rotation of the slat 3. And
In the rotation range of the angle adjusting shaft 48 until the second clutch shaft 40 rotates integrally with the first clutch shaft 39 and the slide ball 43 moves from one end of the intermediate portion of the guide groove 42 to the other end, the slat is 3 is set so as to rotate substantially 180 degrees from the fully closed state and return to the fully closed state.

Next, the operation of the horizontal blind configured as described above will be described. When the operation cord 6 is operated in the slat pulling direction to perform the pulling operation of the slat 3, the input shaft 9 is rotated in the slat pulling direction via the pulley 10, and the slat 3 is rotated to almost the vertical direction. The carrier of the gear mechanism is engaged with the fitting shaft 13,
The carrier and the camshaft 14 are rotated integrally.

Then, since the slide ball 20 moves in the first groove 18a of the cam shaft 14, the cam shaft 14 hardly moves in the axial direction. When the camshaft 14 is rotated in this state, the one-way cam 21 is rotated in the same direction, and the first clutch plate 24 is rotated in the same direction via the ratchet teeth 23 and 26. Then, the clutch ring 28 is rotated together with the first clutch plate 24 in the direction of arrow D in FIG. 5, and idles with respect to the lower case 8b.

Further, the second clutch plate 34 meshing with the first clutch plate 24 is rotated in the same direction, and the elevating shaft 36 is rotated. Accordingly, the lifting cord 5 is wound up by operating the operation cord 6, and the slat 3 is raised.

At this time, the transmission shaft 12 is rotated based on the rotation of the input shaft 9, and the first and second clutch shafts 39 and 4 are rotated.
0 is rotated integrally, the angle adjusting shaft 48 is rotated based on the rotation of the second clutch shaft 40, and the slat 3 is rotated.

When the slat 3 is rotated to the fully closed state and the slide ball 43 reaches the end 42a of the guide groove 42, the second clutch shaft 40 is moved to the first clutch shaft 39.
, And the first clutch shaft 39 idles with respect to the second clutch shaft 40.

Accordingly, when the slat 3 is rotated to the fully closed state, the connection between the transmission shaft 12 and the angle adjusting shaft 48 is cut off. When the operation cord 6 is released after the slat 3 is pulled up to a desired position, a rotating force in the downward direction of the slat 3 acts on the elevating shaft 36 due to the weight of the slat 3. Then, a rotational force acts on the second clutch plate 34 in the same direction, and the first clutch plate 24 attempts to rotate in the same direction.

Then, as shown in FIG. 5, the clutch ring 28 is rotated in the direction of the arrow E, and the cam 30 and the locking portion 3 are rotated.
1 and the clutch ball 32 is engaged, and the clutch ring 2
8 is prevented from rotating in the same direction.

Accordingly, the first and second clutch plates 24,
34, the rotation of the lifting shaft 36 in the same direction is prevented, and the slat 3 is prevented from falling under its own weight. As a result, the slat is suspended and supported at a desired position.

When the operation cord 6 is operated in the slat descent direction to lower the slat 3, the input shaft 9 is rotated in the slat descent direction via the pulley 10, and the cam is transmitted via the planetary gear mechanism and the fitting shaft 13. The shaft 14 is rotated in the same direction.

Then, the ratchet teeth 23 of the one-way cam 21 rotating integrally with the camshaft 14 idle around the ratchet teeth 26 of the second clutch plate 34, and the camshaft 14
Are allowed to rotate in the same direction. Then, with the rotation of the cam shaft 14, the slide ball 20 moves from the first groove 18a of the cam shaft 14 into the second groove 18b, so that the cam shaft 14 moves in the direction of arrow C shown in FIG. Thus, the state shown in FIG. 3 is obtained.

Then, the one-way cam 21 and the first clutch plate 24 move together with the camshaft 14 in the same direction.
The first clutch plate 24 is disengaged from the second clutch plate 34, and the second clutch plate 34 and the elevating shaft 36 are freely rotatable. As a result, the slat 3 descends by its own weight, and this descending operation can be performed by an operation within half a rotation of the camshaft 14.

When the slide ball 20 reaches the converging portion 18d of the second groove 18b, further rotation of the cam shaft 14 in the same direction is prevented, and further rotation of the pulley 10 by the operation cord 6 cannot be performed. Becomes When the operation cord 6 is released in this state, the slide ball 20 returns to the first groove 18a by the urging force of the coil spring 16.

The horizontal blind slat driving device configured as described above has the following effects. (1) By operating the operation cord 6 in the slat lifting direction, the lifting cord 5 can be wound by the lifting cord winding device, and the slat 3 can be pulled up. (2) After lifting the slat 3 to a desired position, releasing the operation cord 6 prevents the slat 3 from lowering its own weight.
The slat 3 can be suspended and supported at a desired position. (3) By operating the pulley 10 in the slat descent direction based on the operation code 6, the slat 3 can be lowered by its own weight by an operation within half a rotation of the cam shaft 14. (4) The weight of the slat 3 is prevented from lowering without using the frictional force of the torsion coil spring. The lowering operation of the slat 3 may be performed by operating the operation cord 6 in the slat lowering direction and rotating the cam shaft 14 within a range of half a rotation. At this time, since there is no urging force in the direction that hinders the rotation of the cam shaft 14, the lowering operation of the slat 3 can be performed with a small operation force. Further, the operation force at the time of raising the slat 3 can be reduced. (5) Since the lowering operation of the slat 3 can be performed by pulling the operation code 6 directly downward in the slat lowering direction, the lowering operation of the slat 3 can be performed easily. (6) A state in which the operation cord 6 is operated in the slat descending direction to move the slide ball 20 into the second groove 18b, and the engagement between the first clutch plate 24 and the second clutch plate 34 is released. Then, even if the slat 3 descends due to its own weight and releases the operation cord 6 in this state, the slide ball 20 is held in the second groove 18b. Therefore, even when the slat 3 is lowered to the lowermost limit, it is not necessary to continue pulling the operation code 6 downward, so that the lowering operation of the slat 3 can be performed easily. (7) When the slat 3 is rotated to the fully closed state during the pulling operation of the slat 3, the connection between the transmission shaft 12 and the angle adjustment shaft 48 is disconnected by the tilt clutch 37, and the transmission shaft 12 is adjusted in angle. It becomes freely rotatable with respect to the shaft 48.
Therefore, after the slat 3 is rotated to the fully closed state, the load acting on the transmission shaft 12 from the angle adjusting shaft 48 can be cut off, so that the operation force required for pulling up the slat 3 can be reduced. . (8) When the slide ball 20 passes through the bent portion 18c of the first groove 18a during the pulling operation of the slat 3, the slide ball 20 moves in the rotation axis direction of the cam shaft 14 due to the long groove-shaped concave portion 19. The cam shaft 14 is not moved in the axial direction. Therefore, the movement of the camshaft 14 in the rotation axis direction can be prevented when the slat 3 is pulled up, so that the operation force required for the pulling up operation can be reduced. (9) During the angle adjusting operation of the slats 3, the carrier of the planetary gear mechanism does not engage with the fitting shaft 13, and the elevating shaft 36 is not rotated, so that the bottom rail 4 does not move up and down. (Second Embodiment) In this embodiment, the structure of the self-weight drop prevention device including the clutch ring 28 and the like and the tilt clutch 37 of the slat drive device of the first embodiment is changed. The same components as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof will be omitted.

As shown in FIG. 10, near the bearing 17b of the upper case 8a, a substantially cylindrical stop ring case 61 is non-rotatably fitted to the inner peripheral surface of the upper case 8a. A stop ring 62 is fitted on the inner peripheral surface of 61.

As shown in FIG. 12, both ends 63a and 63b of the stop ring 62 are bent toward the center at substantially 90 degrees. Inside the stop ring 62, in a space of approximately 270 degrees sandwiched between the both ends 63a and 63b, the first engagement portion 6 protruding from the carrier 64 of the planetary gear mechanism shown in FIG.
5 is projected in a range of approximately 130 degrees. A second engaging portion 66 protruding from the fitting shaft 13 protrudes from a space of approximately 90 degrees between the both ends 63a and 63b.

Then, the input shaft 9 is rotated and the carrier 6 is rotated.
4 is rotated, and the first engagement portion 65 is moved to the end portions 63a, 63b.
In this case, the end of the stop ring 62 is pulled in the radial direction by the first engagement portion 65, and the frictional force between the stop ring 62 and the stop ring case 61 is reduced.

Therefore, when the carrier 64 is rotated, the stop ring 62 and the second engagement portion 66 are rotated together with the first engagement portion 65 in the stop ring case 61, so that the carrier 64 is fitted. The joint shaft 13 is integrally rotated. At this time, the first engaging portion 65 is connected to the end portions 63a, 63
The carrier 64 idles with respect to the fitting shaft 13 until it comes into contact with any one of 3b.

On the other hand, when the fitting shaft 13 tries to rotate by the rotational force acting on the fitting shaft 13 from the cam shaft 14, the second engaging portion 66 comes into contact with one of the ends 63a and 63b. Then, the end of the stop ring 62 is pulled in the radially expanding direction, and the stop ring 62 and the stop ring case 61 are pulled out.
, The rotation of the fitting shaft 13 is prevented.

Therefore, the rotation of the fitting shaft 13 due to the rotational force acting on the fitting shaft 13 from the cam shaft 14 is prevented. FIG. 13 is a development view of a guide groove 67 formed on the outer peripheral surface of the cam shaft 14. The guide groove 67 is
A first groove 67a that is continuous on the peripheral surface of the cam shaft 14, and a first groove 67a that branches off from the bent portion 67c of the first groove 67a to the distal end side of the cam shaft 14 through a rotation angle of approximately 270 degrees. And a second groove 67b that gradually converges toward the center. The first and second grooves 67a and 67b are formed on the peripheral surface of the cam shaft 14 for one period.

The bent portion 67c is formed at a branch between the first groove 67a and the second groove 67b so as to be bent toward the second groove 67b. When the camshaft 14 configured as described above is rotated in the slat pull-up direction by the fitting shaft 13, the slide ball 20 moves in the direction of arrow A relative to the guide groove 67 in FIG. Then, the slide ball 20 moves in the first groove 67a by the urging force of the coil spring 16.

When the slide ball 20 passes through the bent portion 68c, the cam shaft 14 is not moved in the axial direction because the recess 19 allows the slide ball 20 to move.

When the cam shaft 14 is rotated by the fitting shaft 13 in the slat pull-down direction, the slide ball 20 moves in the arrow B direction relative to the guide groove 67. Then, the slide ball 20 moves from the first groove 67a to the bent portion 67c.
Is guided into the second groove 67b through the second groove 67b.
To return to the first groove 67a through the first groove 67a.

At this time, the slide ball 20 is
b, the camshaft 14 is driven by the coil spring 1
6 against the urging force of No. 6 in the direction of arrow F shown in FIG. When the slide ball 20 returns from the second groove 67b into the first groove 18a, the state returns to the state shown in FIG.

Therefore, while the camshaft 14 makes one rotation in the slat pulling-down direction, the slide ball 20 moves in the second groove 67b within a range of approximately 270 degrees, and the first ball in the remaining range of approximately 90 degrees. It moves in the groove 67a.

The camshaft 14 has teeth 68 formed at the tip thereof so as to be able to mesh with the second clutch plate 34. Therefore, the camshaft 14 of this embodiment corresponds to the one in which the first clutch plate 24 of the first embodiment is integrally formed.

The upper case 8a and the case cover 8c
A tilt clutch 69 is mounted on the upper side. Describing a specific configuration of the tilt clutch 69, a tilt clutch case 70 is mounted on the upper case 8a and the case cover 8c, and a tilt gear 71 is rotatably supported in the tilt clutch case 70. When the input shaft 9 is rotated, the tilt gear 71 is rotated via a transmission gear supported by the case cover 8c.

A clutch spring 72 is wound around the tip of the gear shaft of the tilt gear 71,
The proximal end of the clutch member 73 is supported at the distal end of “a” so as to be relatively rotatable. As shown in FIG. 14, the clutch spring 72 is bent so that both ends 72a and 72b protrude in a radial direction of the gear shaft 71a at a predetermined interval.

Both ends 72 of the clutch spring 72
a, 72b between the clutch member 73 and the engaging portion 7
3a is projected. Then, the gear shaft 71a is rotated, and either one of both ends 72a, 72b is
When it comes into contact with 3a, one of its ends 72a, 72b is pushed in the radial direction of the clutch spring 72, so that the frictional force between the clutch spring 72 and the gear shaft 71a increases.

Therefore, when the gear shaft 71a is rotated, the clutch member 73 is rotated in the same direction via the clutch spring 72, so that the gear shaft 71a is connected to the first clutch shaft 39 of the first embodiment. And the clutch member 7
Reference numeral 3 corresponds to the second clutch shaft 40 of the first embodiment.

The upper case 8a is formed with a rotation preventing portion 74 projecting on the rotation locus of both ends 72a and 72b of the clutch spring 72. And the gear shaft 7
1a is rotated, and both ends 72 of the clutch spring 72 are rotated.
a, 72b comes into contact with the rotation preventing portion 74,
Either of the two ends 72a, 72b is pushed in the radial direction of the clutch spring 72, so that the frictional force between the clutch spring 72 and the gear shaft 71a is reduced.

Therefore, when one of the two ends 72 a, 72 b comes into contact with the rotation preventing portion 74, the gear shaft 71 a runs idle with respect to the clutch spring 72. As a result, the clutch member 73 is moved from a state in which one end of the clutch spring 72 is in contact with one side of the rotation preventing section 74 to a state in which the other end is in contact with the other side of the rotation preventing section 74. And almost 18
It rotates integrally with the gear shaft 71a only at 0 degrees.

At the tip end of the clutch member 73,
A substantially cylindrical coil frame 75 is fitted and fixed between the tilt clutch case 70 and the upper case 8a, and a stop ring 76 is fitted on the inner peripheral surface of the coil frame 75.

As shown in FIG. 15, the both ends 76a and 76b of the stop ring 76 project radially inward at a predetermined interval, and the stop ring 76 is engaged with the clutch member 73 between the two ends 76a and 76b. The part 73b is projected.

Then, when the clutch member 73 is rotated,
The engaging portions 73b are provided at both ends 76a, 7 of the stop ring 76.
6b, the ends 76a, 76
Since any one of b is pushed in the diameter reducing direction of the stop ring 76, the frictional force between the stop ring 76 and the coil frame 75 is reduced.

Therefore, the engaging portion 73b is
6, the clutch member 73 and the stop ring 76 rotate integrally, so that the stop ring 76 rotates integrally with the clutch member 73 as the clutch member 73 rotates. I do.

The tilt output shaft 7 is provided in the coil frame 75.
The tip end of the tilt output shaft 77 is rotatably supported between the upper case 8 a and the tilt clutch case 70.

An engagement portion 77a is formed at the base end of the tilt output shaft 77 so as to sandwich both ends 76a, 76b of the stop ring 76 with the engagement portion 73b of the clutch member 73. I have. Therefore, when the clutch member 73 is rotated, the tilt output shaft 77 is integrally rotated via the stop ring 76.

Further, based on the rotation of the tilt output shaft 77, the engaging portion 77a is moved to both ends 76a, 7a of the stop ring 76.
6b, one of the two ends 76a, 76b is pushed in the radial direction of the stop ring 76, so that the frictional force between the stop ring 76 and the coil frame 75 increases.

Therefore, the engaging portion 77a is
6, the rotation of the tilt output shaft 77 is prevented. One end of an angle adjusting shaft 48 is fitted to the tip of the tilt output shaft 77,
Based on the rotation of the angle adjusting shaft 48, the angle of the slat 3 is adjusted via the ladder cord support device and the ladder cord 2.

Next, the operation of the horizontal blind configured as described above will be described. When the operation cord 6 is operated in an arbitrary direction to perform the angle adjusting operation of the slat 3, the input shaft 9 is rotated via the pulley 10, and the tilt gear 71 is rotated via the transmission gear.

Then, the clutch member 73 is rotated together with the clutch spring 72 based on the rotation of the gear shaft 71a, and the tilt output shaft 77 is rotated together with the stop ring 76 based on the rotation of the clutch member 73. Then, the angle adjusting shaft 48 is rotated to adjust the angle of the slat 3 in a direction corresponding to the operation direction of the operation cord 6.

When the slat 3 is rotated to the vertical direction,
Either of the two ends 72a, 72b of the clutch spring 72 abuts against the rotation preventing portion 74 of the upper case 8a, and the gear shaft 71a idles with respect to the clutch spring 72,
The connection between the gear shaft 71a and the tilt output shaft 77 is cut off.

Accordingly, the rotation of the gear shaft 71a is not transmitted to the tilt output shaft 77, and the rotation of the slat 3 is stopped. Therefore, even if the operation cord 6 is continuously operated, the slat 3 is rotated to the vertical direction. After that, it is not rotated further in the same direction.

In such an operation for adjusting the angle of the slat 3, the carrier 64 of the planetary gear mechanism is rotated based on the rotation of the input shaft 9. Before engaging with the second engaging portion 66 of
Since the slat 3 is rotated vertically, the slat 3
The lifting shaft 36 is not rotated during the angle adjustment operation. As a result, during the operation of adjusting the angle of the slat 3, the bottom rail 4
Is not raised or lowered.

When the operation cord 6 is operated in the slat pulling direction to perform the pulling operation of the slat 3, the input shaft 9 is rotated in the slat pulling direction via the pulley 10. Then, the carrier 64 of the planetary gear mechanism is rotated, and the stop spring 62 is moved to the stop ring case 61.
, And the fitting shaft 13 is rotated based on the rotation of the carrier 64.

Then, since the slide ball 20 moves in the first groove 67a of the cam shaft 14, the cam shaft 14 hardly moves in the axial direction. When the camshaft 14 is rotated in this state, the second clutch plate 34 meshing with the teeth 68 of the camshaft 14 is rotated in the same direction, and the elevating shaft 36 is rotated.
Accordingly, the lifting cord 5 is wound up by operating the operation cord 6, and the slat 3 is raised.

After lifting the slat 3 to the desired position,
When the operation cord 6 is released, a rotating force in the downward direction of the slat 3 acts on the lifting shaft 36 due to the weight of the slat 3. Then, a rotational force acts on the second clutch plate 34 in the same direction, and the camshaft 14 and the fitting shaft 13 try to rotate in the same direction.

Then, since the second engaging portion 66 of the fitting shaft 13 pushes the end of the stop ring 62 in the diameter increasing direction, the frictional force between the stop ring 62 and the stop ring case 61 increases, and the stop ring The rotation of 62 is prevented.

Therefore, the rotation of the fitting shaft 13 is prevented, and the lifting shaft 36 is moved through the cam shaft 14 and the second clutch plate 34.
Is prevented from rotating. As a result, the slat 3 is prevented from falling under its own weight, and the slat 3 is suspended and supported at a desired position.

When the operation cord 6 is operated in the slat descent direction to lower the slat 3, the input shaft 9 is rotated in the slat descent direction via the pulley 10, and the carrier 64 and the fitting shaft 13 of the planetary gear mechanism are moved. Via camshaft 1
4 is rotated in the same direction.

Then, as the camshaft 14 rotates,
Since the slide ball 20 moves from the first groove 67a of the camshaft 14 into the second groove 67b, the camshaft 14 moves in the direction of the arrow F shown in FIG. 10 to the state shown in FIG.

Then, the camshaft 14 and the second clutch plate 3
4 and the second clutch plate 34 and the lifting shaft 3
Numeral 6 is freely rotatable. As a result, the slat 3 is lowered by its own weight, and this lowering operation is performed by the camshaft 14.
It is possible by the operation within one rotation of.

When the slat 3 is lowered, the first groove 67
If the slide ball 20 is positioned in the second groove 67b of the portion extending in parallel with the position a, the slide ball 20 is held at that position even if the operation code 6 is released, and the camshaft 14 and the second clutch plate The slats 3 are lowered to the lowermost limit since the engagement with the slats 34 is maintained.

When the operation cord 6 is continuously operated in the downward direction of the slat 3, the slide ball 20 returns to the first groove 67a, and the camshaft 14 moves toward the second clutch plate 34 and meshes with each other. Returns to the state.

Then, the rotation of the elevating shaft 36 based on the weight of the slat 3 is prevented, and the rotation of the fitting shaft 13 is
Is transmitted to the second clutch plate 34 through the
Is rotated in the slat descent direction.

Next, when the operation cord 6 is further operated in the slat descending direction, the slide ball 20 is moved to the second groove 67b.
And the elevating shaft 36 becomes rotatable again.
When the operation cord 6 is continuously operated in the slat descending direction by such an operation, the slide ball 20 is returned to the first groove 67a during the rotation of the camshaft 14 by about 9 degrees.
In the range of 0 degrees, the elevating shaft 36 is forcibly rotated in the slat descending direction.

In the slat drive device provided with the tilt clutch constructed as described above, (1), (2), (5), (6), (7) and (8) obtained in the first embodiment. In addition to the functions and effects, the following functions and effects can be obtained. (1) By operating the pulley 10 in the slat descent direction based on the operation of the operation code 6, the slat 3 can be lowered by its own weight within one rotation of the camshaft 14. (2) When the angle of the slat 3 is adjusted by operating the operation code 6, the first engaging portion 65 of the carrier 64 is moved to the second position of the fitting shaft 13 in the rotation range of the input shaft 9 for the angle adjustment. Does not come into contact with the engaging portion 66. Therefore, when the angle of the slat 3 is adjusted, the lifting shaft 36 is not rotated, so that the bottom rail 4 does not move up and down. (3) When the operation code 6 is continuously pulled in the slat descent direction, the slide ball 20 is returned from the second groove 67b to the first groove 67a based on the rotation of the cam shaft 14,
The rotation of the input shaft 9 is transmitted to the lifting shaft 36. Therefore, even when the slat 3 cannot be lowered due to its own weight, the slat 3 can be lowered by operating the operation code 6. (4) The rotation of the tilt output shaft 77 based on the rotational force acting on the tilt output shaft 77 from the angle adjusting shaft 48 is stopped by the action of the stop ring 76. Therefore, slat 3
After the angle is adjusted to a desired angle, rotation of the angle adjusting shaft 48 due to the weight or the like of the slat 3 is prevented, so that the slat 3 can be reliably held at the desired angle.

Note that the above embodiment can also be configured as follows. -In addition to the operation code 6, the input shaft 9 may be configured to be rotated by an operation rod hanging down from the head box 1. The lifting drive unit of the slat drive device of each of the above embodiments can also be used for a lifting curtain or a pleated curtain lifting device that raises or lowers the curtain fabric by winding or rewinding the lifting cord in the head box. . As shown by the chain line in FIG. 4, the holding portion 18e may be provided by extending the converging portion 18d in the direction of arrow B. With such a configuration, the slide ball 20 is
When the cam shaft 14 is rotated from the position b to the inside of the holding portion 18e, the return of the slide ball 20 to the first groove 18a by the urging force of the coil spring 16 is prevented. 3 can be lowered to its lower limit by its own weight. -The input shaft 9 may be configured to be rotationally driven by the driving force of a motor.

The technical ideas other than the claims which can be understood from the embodiment will be described below together with their effects. (1) In claim 2, the second groove has a groove for returning a slide ball to the first groove based on rotation of a cam shaft in a slat descent direction. After lowering the slat 3, if the operating means is further operated in the slat lowering direction,
The slide ball automatically returns to the first groove.

[0126]

As described above in detail, the present invention can provide a slat drive device for a horizontal blind which can easily perform a slat elevating operation and further reduce an operation force required for the elevating operation.

[Brief description of the drawings]

FIG. 1 is a front view showing a horizontal blind.

FIG. 2 is a cross-sectional view illustrating the slat drive device according to the first embodiment.

FIG. 3 is a cross-sectional view illustrating the slat drive device according to the first embodiment.

FIG. 4 is a development view showing a guide groove of the camshaft according to the first embodiment.

FIG. 5 is a cross-sectional view illustrating the slat drive device according to the first embodiment.

FIG. 6 is a sectional view showing a tilt clutch according to the first embodiment.

FIG. 7 is a developed view showing a guide groove of the tilt clutch.

FIG. 8 is a sectional view showing a tilt clutch according to the first embodiment.

FIG. 9 is a cross-sectional view illustrating an operation of the tilt clutch according to the first embodiment.

FIG. 10 is a cross-sectional view illustrating a slat drive device according to a second embodiment.

FIG. 11 is a cross-sectional view illustrating a slat drive device according to a second embodiment.

FIG. 12 is a cross-sectional view illustrating a self-weight drop prevention device according to a second embodiment.

FIG. 13 is a development view showing a guide groove of a cam shaft according to the second embodiment.

FIG. 14 is a cross-sectional view illustrating a tilt clutch according to a second embodiment.

FIG. 15 is a cross-sectional view illustrating a tilt clutch according to a second embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Head box 3 Shielding material (slat) 4 Bottom rail 5 Elevating code 6 Operating means (operating code) 7 Slat drive device 14 Cam shaft 18 Cam means (guide groove) 20 Slide ball 36 Elevating shaft

 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Yoshiyuki Kobe 1-day Matsushita, Kano-Baba, Chiaki-cho, Ichinomiya-shi, Aichi F-term (reference) 2E043 AA01 AA04 BB02 BC02 BD01

Claims (12)

[Claims] 1. A shielding material is suspended and supported by an elevating cord suspended from an elevating cord winding device in a head box, and operating means is suspended from the head box, and operation of the operating means is performed in the head box. Based on the, the lifting cord winding device is driven, the lifting operation of the shielding material, the self-weight drop prevention operation of preventing the self-weight drop of the shielding material, and the shielding material lowering operation by the self-weight of the shielding material In a solar shading device provided with a shielding material elevating device to perform, the shielding material lowering operation by the shielding material elevating device is moved in the direction of the rotation axis while rotating the cam shaft by operating the operating device, and the operating device is released. A cam means capable of holding the cam shaft at its moving position in a state, and releasing the meshing state with the movement of the cam shaft to drive the elevating cord winding device. Shielding material lifting apparatus solar shading device which is characterized in that a lifting axis by a clutch device for rotatable based on the weight of the shielding material. 2. The cam means comprises: a slide ball supported by a case of the shielding member elevating device so as to be immovable in a rotation direction of the cam shaft; and a slide ball on an outer peripheral surface of the cam shaft. A guide groove for continuously guiding the cam shaft in a circumferential direction of the cam shaft, wherein the guide groove moves the cam shaft in the axial direction when the operating means rotates the cam shaft in a direction of pulling up the shielding member. A first groove for rotating the cam shaft in the direction of lowering the shielding material of the cam shaft, and a second groove for disengaging the clutch device by moving the cam shaft in the rotation axis direction. The shielding material raising / lowering device of the solar radiation shielding device according to claim 1, wherein: 3. The clutch device includes a first clutch device that moves in the axial direction together with the cam shaft, and a second clutch device that is connected to the elevating shaft. 3. The apparatus according to claim 2, further comprising a self-weight drop prevention device that prevents only rotation of the first clutch device in a shielding material lowering direction. 4. A one-way cam for transmitting only a rotational force in a direction of pulling up a shielding material to the first clutch device is interposed between the cam shaft and the first clutch device. 4. A device for elevating and lowering the shielding material of the solar radiation shielding device according to claim 3. 5. The self-weight drop prevention device, a clutch ring that rotates integrally with the first clutch device, a locking portion formed in the case around the clutch ring, and housed in the locking portion. And the locking portion engages the clutch ball with the clutch ring to prevent the rotation only when the clutch ring rotates in the shielding material lowering direction. The shielding material lifting / lowering device of the solar radiation shielding device according to any one of claims 3 to 4. 6. The clutch device includes the cam shaft and a second clutch device connected to the elevating shaft. A fitting shaft that rotationally drives the cam shaft includes a second shaft from the elevating shaft. 3. The solar shading device according to claim 2, further comprising: a self-weight drop prevention device that prevents the fitting shaft from rotating in a lowering direction of the shielding material based on a rotational force acting on the cam shaft via the second clutch device. Shielding material elevating device. 7. The self-weight drop prevention device is disposed around the fitting shaft, a stop ring case fixed to a case of a shielding material elevating device, and between the stop ring case and the fitting shaft. The rotation of the fitting shaft based on the operation of the operation code is allowed, and the rotation of the fitting shaft in the shielding material descending direction based on the rotating force transmitted from the elevating shaft to the cam shaft is performed by the stop ring case. 7. A shielding member lifting / lowering device for a solar radiation shielding device according to claim 6, further comprising: a stop ring for stopping with a frictional force. 8. The shielding of the solar shading device according to claim 6, wherein the second groove overlaps the first groove at a predetermined rotation angle within a range of one rotation of the camshaft. Material lifting device. 9. An axial direction of the camshaft such that the slide ball is guided from the first groove to the second groove when the camshaft rotates in a shielding member lowering direction. The slide ball is provided with a long groove-shaped concave portion that supports the slide ball passing through the bent portion movably in the rotation axis direction when the cam shaft rotates in the shielding material pulling direction. The shielding material lifting / lowering device for a solar radiation shielding device according to claim 2, wherein the device is supported by a case of the material lifting / lowering device. 10. A ladder cord suspended from a ladder cord support device in a head box supports a plurality of slats, and a lifting cord suspended from a lifting cord winding device in the head box is attached to the slat. A bottom rail is connected to the lower end of the elevating cord while being inserted, and a common driving unit for performing a slat elevating operation and an angle adjusting operation from the head box is provided, and the operation of the driving unit is performed in the head box. Based on the above, the ladder cord supporting device is driven through an angle adjusting shaft, and the elevating cord winding device is driven through an elevating shaft. A slat drive device that performs a descent prevention operation, a slat descent operation by its own weight, and a slat angle adjustment operation In the horizontal blind provided with, the slat descent operation by the slat drive device, a cam shaft that moves in the direction of the rotation axis while rotating by the operation of the driving means, and releases the meshing state with the movement of the cam shaft. A slat drive device for a horizontal blind, wherein the slat drive device drives the elevating cord winding device with a clutch device that is rotatable based on the weight of the slat. 11. The slat drive device drives an elevation drive unit that drives the elevation cord winding device and the ladder code support device based on rotation of an input shaft that is rotationally driven by the drive means. An angle adjustment drive unit is provided, and between the input shaft and the elevation drive unit, when the rotation range of the input shaft over which the angle adjustment operation of the slat is performed by the angle adjustment drive unit is exceeded, the rotation of the input shaft is performed. The slat drive device for a horizontal blind according to claim 10, further comprising: a rotation transmission device that transmits the rotation to the elevation drive unit. 12. A ladder cord suspended from a ladder cord supporting device in a head box supports a plurality of slats, and a lifting cord suspended from a lifting cord winding device in the head box is provided to the slat. A bottom rail is connected to the lower end of the elevating cord while being inserted, and a common driving unit for performing a slat elevating operation and an angle adjusting operation is provided in the head box, and the operation of the driving unit is provided in the head box. A slat that drives the ladder cord support device via an angle adjusting shaft and drives the elevating cord winding device via an elevating shaft to perform a slat lifting operation and an angle adjusting operation of the slat. In a horizontal blind provided with a driving device, the slat driving device is driven to rotate by the driving unit. Based on the rotation of the force shaft, provided with a lifting drive to drive the lifting cord winding device, and an angle adjustment drive to drive the ladder code support device, between the input shaft and the lifting drive A rotation transmission device for transmitting the rotation of the input shaft to the elevation drive unit when the rotation of the input shaft exceeds the rotation range of the input shaft in which the angle adjustment operation of the slat is performed by the angle adjustment drive unit. Blind slat drive.