WO2010047323A1

WO2010047323A1 - Operation device of solar radiation shielding apparatus

Info

Publication number: WO2010047323A1
Application number: PCT/JP2009/068053
Authority: WO
Inventors: 英治河合; 大輔高橋
Original assignee: 立川ブラインド工業株式会社
Priority date: 2008-10-21
Filing date: 2009-10-20
Publication date: 2010-04-29
Also published as: JP2010101007A; JP5376708B2; CN102112695A; CN102112695B

Abstract

An operation device of a horizontal blind comprises an operation shaft rotated when an operating section is operated, a drive shaft which rotates in linkage with rotation of the operation shaft and lifts slats, and a clutch spring interposed between the operation shaft and the drive shaft and attached to the housing of a one-way clutch. The clutch spring transmits the rotation of the operation shaft to the drive shaft so that the drive shaft rotates in linkage with rotation of the operation shaft and integrally to the operating shaft. The clutch spring stops the rotation of the drive shaft by a frictional force generated between itself and the housing when the operating section is not operated. The one-way clutch rotates the housing together with the clutch spring only when the operation shaft is rotated in the slat pull-up direction.

Description

Operation device for solar shading device

The present invention relates to an operating device for a solar shading device such as a horizontal blind.

One type of horizontal blind operating device is one in which a slat is rotated and lifted by operating an endless operation cord suspended from one end of the head box.

In such an operating device, a tilt device is attached to a drive shaft that is rotatably supported in the head box, and a ladder cord is suspended and supported from the tilt device. The tilt device rotates the slats based on the rotation of the drive shaft, and prevents the slats from rotating further when each slat is rotated in the horizontal direction.

Also, the lifting / lowering cord is suspended and supported from the lifting / lowering drum that rotates integrally with the drive shaft, and the slat is lifted / lowered by winding the lifting / lowering cord around the lifting / lowering drum based on the rotation of the drive shaft.

The operation code is hooked on a pulley that is rotatably supported by the head box, and the rotation of the pulley is transmitted to the drive shaft through the gear box. When the pulley is rotated by operating the operation cord, the drive shaft is rotated, and the slat can be rotated and lifted by the rotation of the drive shaft.

Such horizontal blinds are equipped with a stopper device that prevents the slats from dropping their own weight when the operation cord is not operated. This stopper device is provided between the operation shaft and the drive shaft of the gear box. The stopper device operates to transmit rotation of the operation shaft of the gear box to the drive shaft and prevent rotation of the drive shaft due to a load acting on the drive shaft.

Specifically, when the clutch spring is wound around the brake drum and the pulley is rotated by the operation of the operation cord, the clutch spring is expanded to reduce the friction with the brake drum, thereby raising and lowering the slats. Make it possible. Further, when the operation cord is not operated, the friction force between the brake drum and the clutch spring prevents the slat from dropping its own weight.

JP-A-11-182160

In the operation device as described above, when the operation cord is operated to raise and lower the slat, the clutch spring is expanded in diameter and friction with the brake drum is reduced, but the clutch spring slides on the peripheral surface of the brake drum. Since this is a state, the frictional resistance is not lost.

Therefore, particularly when pulling up the slat, it is necessary to operate the operation cord with an operation force exceeding the sum of the weight of the slat and the frictional resistance, and thus a large operation force is required.
Patent Document 1 discloses an operation in which the operating force can be reduced by rotating the rotating shaft without passing through the clutch spring during the lifting operation of the blind while expanding the clutch spring to reduce the friction with the brake drum. An apparatus is disclosed.

However, since the first clutch mechanism and the second clutch mechanism are necessary, the size of the operating device increases in the axial direction of the rotating shaft, and the number of parts also increases.
An object of the present invention is to provide a miniaturized operating device for a solar shading device that reduces the operating force required for the raising / lowering operation of the shielding material and prevents the blind weight from falling due to the frictional force of the clutch spring.

In order to achieve the above object, an operating device for a solar shading device according to the present invention comprises an operating shaft, a drive shaft, and a clutch spring. The operation shaft is rotated through operation of the operation unit. The drive shaft rotates based on the rotation of the operation shaft to raise and lower the shielding material. The clutch spring is interposed between the operation shaft and the drive shaft, and is attached to the brake drum. The clutch spring rotates integrally with the operation shaft based on the rotation of the operation shaft, and transmits the rotation of the operation shaft to the drive shaft. The clutch spring prevents rotation of the drive shaft by a frictional force generated between the clutch spring and the brake drum when the operation portion is not operated. The brake drum is composed of a cylindrical housing of a one-way clutch. The one-way clutch allows the housing to rotate integrally with the clutch spring only by rotating the operating shaft in the pulling direction of the shielding material.

According to the present invention, it is possible to reduce the operating force required for the raising / lowering operation of the shielding material, and to reduce the size of the operating device of the solar radiation shielding device that prevents the weight of the blind from falling due to the frictional force of the clutch spring.

It is a front view which shows a horizontal blind. It is a top view which shows an operating device. It is a side view which shows an operating device. It is a side view which shows a one-way clutch. It is sectional drawing which shows a one-way clutch.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings. A horizontal blind (sunlight shielding device) shown in FIG. 1 has a head box 1 that supports a plurality of slats (shielding materials) 3 through a plurality of ladder cords 2 at the lower end of the ladder cord 2. A bottom rail 4 is attached.

The upper end portion of the ladder cord 2 is supported by a tilt device (not shown) disposed in the head box 1, and the tilt device is provided on a drive shaft 17 (see FIG. 2) disposed in the head box 1. All the slats 3 are rotated in the same phase via the ladder cord 2 based on the rotation. The configuration of the drive shaft 17 will be described later. The tilt device is configured not to further rotate each slat in the same direction after each slat 3 is rotated until the slat 3 is substantially vertical.

A plurality of elevating cords 5 hanging from the head box 1 are passed through the slat 3, and the bottom rail 4 is connected to the lower end of the elevating cord 5. An upper end portion of the lifting / lowering cord 5 is wound around a winding device (not shown) in the head box 1.

Then, when the lifting / lowering cord 5 is wound or rewound based on the rotation of the drive shaft 17 described later, the bottom rail 4 is lifted / lowered, and the slat 3 is lifted / lowered as the bottom rail 4 is lifted / lowered.

An endless operation cord (operation portion) 6 is suspended from one longitudinal end portion of the head box 1, and the operation device is operated by operating the operation cord 6 so that the slat 3 can be moved up and down or adjusted in angle. Yes. A specific configuration of the operating device will be described.

As shown in FIGS. 2 and 3, a gear box 7 is accommodated at one end of the head box 1 and fixed to the head box 1, and an input gear 8 composed of a bevel gear is provided in the gear box 7. And the output gear 9 are rotatably supported in mesh with each other.

The base end of the input shaft 10 is attached to the input gear 8, the tip of the input shaft 10 protrudes from the front surface of the head box 1, and the pulley 11 is attached to the protruding tip. Then, when the operation cord 6 is hooked on the pulley 11 and the pulley 11 is rotated by the operation of the operation cord 6, the output gear 9 is rotated via the input gear 8.

A side surface of the clutch case 12 is fixed to the side surface of the gear box 7, and a support hole 13 is formed on the other side surface of the clutch case 12. The shaft hole 15 of the shaft receiver 14 accommodated in the clutch case 12 is rotatably supported by the support hole 13.

A square hole 16 is formed in the central portion of the shaft portion 15, and an end portion of the drive shaft 17 having a square bar shape is fitted into the square hole 16. Therefore, the end of the drive shaft 17 is supported by the shaft receiver 14 rotatably supported by the clutch case 12, and the shaft receiver 14 and the drive shaft 17 rotate integrally. The rotational axis of the drive shaft 17 coincides with the rotational axis of the output gear 9.

A one-way clutch 18 is accommodated in the clutch case 12. As shown in FIGS. 4 and 5, the one-way clutch 18 includes an inner shaft 19, a retainer 20 that rotates around the inner shaft 19, an outer sleeve 21 that is fitted to the outer peripheral surface of the retainer 20, and its outer And a substantially cylindrical housing 22 fitted to the outer peripheral surface of the sleeve 21. The housing 22 functions as a brake drum. The housing 22, the outer sleeve 21, and the retainer 20 rotate integrally around the rotation axis of the inner shaft 19. The rotation axis of the inner shaft 19 coincides with the rotation axis of the operation shaft 29 that rotates integrally with the output gear 9.

One end of the inner shaft 19 is fixed to the gear box 7. The retainer 20 includes an accommodation groove 24 that holds the six needles 23 between the outer peripheral surface of the inner shaft 19 and the inner peripheral surface of the outer sleeve 21, and the needles 23 that have the same circumference of the inner shaft 19. And a recess 26 that houses a spring 25 that presses in the direction. The outer sleeve 21, the retainer 20, the needle 23, and the spring 25 constitute a clutch mechanism.

The interval in the radial direction of the accommodating groove 24 is narrowed in the pressing direction of the spring 25 by the outer peripheral surface of the round bar-shaped inner shaft 19 and the hexagonal hole-shaped inner peripheral surface of the outer sleeve 21. Therefore, when the needle 23 moves in the pressing direction, the needle 23 is sandwiched between the inner shaft 19 and the outer sleeve 21.

With such a configuration, the housing 22 can rotate in the direction of the arrow A and is prevented from rotating in the direction of the arrow B with respect to the inner shaft 19 which is fixed in the one-way clutch 18.

A clutch spring 27 composed of a torsion coil spring is wound around the outer peripheral surface of the housing 22 of the one-way clutch 18. As shown in FIG. 3, both end portions of the clutch spring 27 are bent in the radial direction to form engagement ends 28a and 28b. The engagement ends 28 a and 28 b protrude at an interval of approximately 90 degrees with respect to the center of the housing 22.

The operation shaft 29 of the output gear 9 has a first projecting piece 30 extending over an angle range of approximately 90 degrees in the clutch case 12. The first projecting piece 30 is located in the first region formed between the engaging ends 28a and 28b, that is, between the engaging ends 28a and 28b over an angle range of approximately 90 degrees. The first projecting piece 30 is formed to be curved along the outer peripheral surface of the housing 22 within an angle range of approximately 90 degrees with respect to the center of the inner shaft 19, and is engaged as the operation shaft 29 rotates. The clutch spring 27 is expanded in diameter in contact with one of the ends 28a, 28b.

When the operation shaft 29 is rotated in the direction of arrow B, the friction between the clutch spring 27 and the outer peripheral surface of the housing 22 decreases. At this time, the housing 22 is prevented from rotating by the operation of the one-way clutch 18. Therefore, the clutch spring 27 rotates with the first protrusion 30 while sliding on the outer peripheral surface of the housing 22.

Further, when the operation shaft 29 is rotated in the direction of arrow A, friction between the clutch spring 27 and the outer peripheral surface of the housing 22 is reduced. At this time, the housing 22 is allowed to rotate by the operation of the one-way clutch 18. Therefore, the clutch spring 27 and the housing 22 rotate integrally with the first projecting piece 30.

When the operation cord 6 is operated in the slat pulling direction, the operation shaft 29 is rotated in the arrow A direction, and when operated in the slat lowering direction, the operation shaft 29 is rotated in the arrow B direction.
The shaft receiver 14 has a second protruding piece 31 extending over the angle range of about 270 degrees. The second projecting piece 31 is located in the second region formed between the engaging ends 28a and 28b, that is, between the engaging ends 28a and 28b over an angle range of approximately 270 degrees. When the second projecting piece 31 presses one of the engagement ends 28a and 28b, the clutch spring 27 is reduced in diameter, and the frictional force of the housing 22 is increased.

When rotational torque in the direction of arrow B acts on the shaft receiver 14 via the drive shaft 17 due to the weight of the slat 3, the frictional force between the clutch spring 27 and the housing 22 increases, and the operation of the one-way clutch 18 causes the housing 22 to move. Rotation is prevented. Therefore, the weight drop of the slat 3 is prevented.

Next, the operation of the horizontal blind equipped with the operation device as described above will be described. When the operation cord 6 is operated to rotate the pulley 11 in the slat pulling direction, the operation shaft 29 is rotated in the arrow A direction via the gear box 7.

Then, since the first projecting piece 30 is rotated in the same direction and presses the engagement end 28a, the clutch spring 27 is expanded in diameter, and the friction between the clutch spring 27 and the housing 22 is reduced. Thereby, the clutch spring 27 is rotated together with the first projecting piece 30.

At this time, since the housing 22 can be rotated in the same direction by the one-way clutch 18, the housing 22 is rotated integrally with the clutch spring 27. Therefore, the clutch spring 27 does not slide with respect to the housing 22.

When the first protrusion 30 is rotated, the second protrusion 31 of the shaft receiver 14 is rotated in the same direction, and the drive shaft 17 is rotated in the same direction. As a result, the lifting / lowering cord 5 is wound up, the bottom rail 4 is pulled up, and the slats 3 are sequentially pulled up from the lower stage.

When the operation cord 6 is operated to rotate the pulley 11 in the slat descending direction, the operation shaft 29 is rotated in the arrow B direction via the gear box 7.
Then, the first projecting piece 30 is rotated in the same direction and presses the engaging end 28b, so that the clutch spring 27 is expanded in diameter and the friction between the clutch spring 27 and the housing 22 is reduced.

At this time, since the one-way clutch 18 prevents the rotation of the housing 22 in the direction of arrow B, the clutch spring 27 rotates while sliding on the outer peripheral surface of the housing 22.

When the first projecting piece 30 is rotated in the direction of arrow B, the second projecting piece 31 of the shaft receiver 14 is rotated in the same direction, and the drive shaft 17 is rotated in the same direction. As a result, the lifting / lowering cord 5 is rewound, the bottom rail 4 is lowered, and the slats 3 are returned to the state where they are supported by the ladder cord 2 sequentially from the upper stage.

When the operation cord 6 is released, the rotational force in the arrow B direction acts on the shaft receiver 14 via the drive shaft 17 due to the weight of the bottom rail 4 and the slat 3. Then, since the second protrusion 31 presses the engagement end 28a of the clutch spring 27, the clutch spring 27 is reduced in diameter, and the friction between the clutch spring 27 and the housing 22 increases.

Also, the one-way clutch 18 prevents the housing 22 from rotating in the direction of arrow B. Therefore, since the rotation of the clutch spring 27 is blocked, the rotation of the drive shaft 17 is blocked and the slat 3 is prevented from dropping its own weight.

In the horizontal blind operating device configured as described above, the following advantages can be obtained.
(1) When the slat 3 is pulled up, the one-way clutch 18 is allowed to rotate, so that the clutch spring 27 and the housing 22 are rotated together. Accordingly, no sliding resistance is generated when the clutch spring 27 rotates, so that the operating force required for the lifting operation of the slat 3 can be reduced.

(2) When the slat 3 is lowered, the one-way clutch 18 is prevented from rotating, and the clutch spring 27 is rotated while sliding on the housing 22. However, since the rotational force due to the weight of the slat 3 and the bottom rail 4 acts on the drive shaft 17, the slat 3 can be lowered by a slight operating force.

(3) When the operation cord 6 is released, the weight of the slat 3 can be prevented from dropping due to the action of the clutch spring 27 and the one-way clutch 18.
(4) Since the clutch spring 27 is mounted on the outer peripheral surface of the housing 22 of the one-way clutch 18, the clutch case 12 can be downsized in the longitudinal direction of the head box 1.

You may implement the said embodiment in the following aspects.
The operating device as described above may be used for a lifting curtain or a pleated screen.

DESCRIPTION OF SYMBOLS 3 ... Shielding material (slat), 6 ... Operation part (operation code), 7 ... Operation part (gear box), 11 ... Operation part (pulley), 17 ... Drive shaft, 18 ... One-way clutch, 22 ... Brake drum (housing) ), 27 ... clutch spring, 29 ... operating shaft.

Claims

An operation shaft that is rotated through operation of the operation unit;
A drive shaft that rotates based on rotation of the operation shaft to raise and lower the shielding material;
A clutch spring that is interposed between the operation shaft and the drive shaft and is attached to a brake drum. The clutch spring rotates integrally with the operation shaft based on the rotation of the operation shaft to rotate the operation shaft. In the operation device of the solar radiation shielding device, comprising: the clutch spring that transmits to the drive shaft and prevents the rotation of the drive shaft by a frictional force generated between the brake drum and the operation portion when the operation portion is not operated.
The brake drum is constituted by a cylindrical housing of a one-way clutch, and the one-way clutch allows the housing to rotate integrally with the clutch spring only by rotating the operation shaft in the pulling-up direction of the shielding material. Operating device to do.
2. The operating device according to claim 1, wherein the one-way clutch includes an inner shaft positioned at a radial center of the housing and a clutch mechanism provided around the inner shaft.
The inner shaft is fixed to a head box that supports the shielding material in a suspended state,
The drive shaft is rotatably supported by a clutch case that houses the one-way clutch,
The clutch spring has an engagement end, the operation shaft has a first projecting piece, the drive shaft has a second projecting piece,
The clutch spring can be expanded in diameter when the engaging end is pressed by the first protruding piece, while the diameter of the clutch spring can be reduced by pressing the engaging end by the second protruding piece. The operating device according to claim 2.
The engagement ends are a pair of engagement ends formed by bending both ends of the clutch spring in a radial direction, and the first projecting piece is between the pair of engagement ends in the circumferential direction of the housing. The operation according to claim 3, wherein the second projecting piece is located in a second region formed between the pair of engagement ends in a circumferential direction of the housing. apparatus.
A gear box provided in the head box;
An input shaft supported by the gear box;
A pulley attached to the input shaft;
An operation cord hung on the pulley;
Further comprising
The operating device according to claim 3 or 4, wherein the operating shaft can be rotated through a gear box by operating the operation code.