JP3064243B2 - Operating device for horizontal blinds - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an operating device for raising and lowering and adjusting the angle of a slat of a horizontal blind.

[0002]

2. Description of the Related Art In a horizontal blind, a plurality of slats are suspended from a head box via a plurality of ladder cords, and a bottom rail is suspended from the lower end of the ladder cord. Also, a plurality of lifting cords are inserted into each slat, one end of the lifting cord is connected to the bottom rail, and the other end is guided into the head box and connected to the operating device.

The slats are raised and lowered by raising and lowering the bottom rail through the lifting cord by operating the operating device. In addition, the angle of each slat is adjusted in phase with the ladder cord by operating the operation device.

[0004] As one type of the operating device, a gear mechanism is provided in a head box, and an input shaft of the gear mechanism protrudes out of the head box through an opening provided in the head box. The operation rod is connected to
Some slats can be adjusted in angle by rotating the operation rod.

In such an operating device, the elevating cord is guided from the inside of the head box into the operating rod, and is connected to a knob at the lower end of the operating rod. Then, by operating the knob to pull out the lifting cord from the head box, the bottom rail is raised, and the slat rises.

When the operation of pulling out the lifting cord is stopped, the self-weight drop prevention device is activated, and the self-weight drop of the slats and the bottom rail is prevented. Further, when the operation of the self-weight drop prevention device is released, the slats and the bottom rail are lowered based on their own weights.

[0007] The above-mentioned device for preventing self-weight drop is disclosed in JP-B-61-5.
In Japanese Patent No. 6747, it is attached to the lower end of the operation rod, and in Japanese Utility Model Publication No. 3-35035 and Japanese Utility Model Publication No. 4-22711, it is disposed in a head box.

[0008]

[Problems to be Solved by the Invention]
Since the weight drop prevention device described in Japanese Patent Publication No. 7 is attached to the lower end of the operating rod, the lower end of the operating rod becomes large.
In addition, since the operation of the self-weight drop prevention device is released by pulling the grip downward against the urging force of the coil spring, the operating rod needs to have strength enough to withstand the reaction force of the coil spring. . Therefore, the diameter of the operation rod becomes large, which is not preferable in terms of beauty.

In the weight drop prevention device described in Japanese Utility Model Publication No. 3-35035, a release code for releasing the operation is inserted into the operation rod, and the release code is released by an operation knob provided at the lower end of the operation rod. By operating
The operation of the weight drop prevention device is released.

Therefore, it is necessary to insert the lifting code and the release code into the operation rod, so that the assembling work is complicated, and the lifting code and the release code interfere with each other, which hinders the lifting operation of the slat. Sometimes. In addition, when performing the slat angle adjustment operation after performing the slat lowering operation, it is necessary to change the operation knob from the operation knob to the operation rod, and the operation is complicated.

The self-weight descent prevention device described in Japanese Utility Model Publication No. 4-22711 requires the operation rod to be tilted while pulling the lifting cord downward in order to cancel its operation. It is.

In order to solve such a problem, Japanese Patent Application No. 7-112112 filed by the present applicant discloses a slat provided in a head box by operating an operating rod for adjusting a slat angle. A horizontal blind operating device has been proposed in which the operation of the self-weight descent prevention device is released and the slats can be lowered.

[0013] However, in this device for preventing its own weight descent of the operating device, the lifting cord is wound around the sleeve in the circumferential direction of the angle adjusting shaft, and then guided in the head box along the angle adjusting shaft. The friction between the weight lowering prevention device and the lifting cord increases. Therefore, there is a problem that a large operation force is required to pull out the lifting cord from the head box at the time of raising the slat, and that the slat may not be lowered smoothly at the time of the lowering operation.

[0014] It is an object of the present invention to cancel the operation of the slat self-weight drop prevention device provided in the head box by operating an operation rod for adjusting the angle of the slat.
It is an object of the present invention to provide a horizontal blind operating device which enables a slat descending operation and can perform a slat descending operation smoothly and at an appropriate speed.

[0015]

According to the first aspect of the present invention, a plurality of slats are suspended from a head box via a ladder cord, and an operation rod suspended from one side of the head box is rotated to operate. By rotating the angle adjusting shaft in the head box, the angle of each slat can be adjusted via the ladder cord, and the bottom rail is pulled up by pulling out the lifting cord suspended from one side of the head box from the head box. The slat can be raised by pulling the lifting cord into the headbox by the weight of the bottom rail and the slat, and the slat can be lowered by moving the lifting cord by the slat's own weight. Is released, the movement of the lifting cord by its own weight is allowed. In the horizontal blind provided with a descent prevention device, the head box includes a brake device that makes the moving speed of the lifting / lowering cord equal to or less than a fixed value when the slat is lowered, and the brake device is provided in the head box. A fixed pulley rotatably supported by the movable pulley and a movable pulley supported so as to be movable in the moving direction of the lifting cord while allowing the lifting cord to be guided in a bent state in cooperation with the fixed pulley. Configured.

According to a second aspect of the present invention, a plurality of slats are suspended and supported from the head box via a ladder cord, and an operation rod hanging down to one side of the head box is rotated to adjust the angle in the head box. By rotating the shaft, it is possible to adjust the angle of each slat via the ladder cord, and by pulling the lifting cord hanging down to one side of the head box from the head box, pulling up the bottom rail and raising the slat. The slats can be lowered by pulling the lifting cord into the head box by the weight of the bottom rail and the slat, and the movement of the lifting cord due to the slat's own weight is always prevented. Weight lowering prevention device that allows the lifting cord to move due to its own weight In the example was a horizontal blind,
In the head box, a brake device for lowering the moving speed of the lifting code at a time of the lowering operation of the slats is provided, and the brake device is mounted with the lifting code and moves the lifting code. A pulley that rotates with the pulley, and a braking device that applies a braking force to the pulley based on a high-speed rotation of the pulley in the slat descending direction.

According to a third aspect of the present invention, the braking device comprises: a braking wheel fitted to a support shaft that rotates with the rotation of the pulley; and a case disposed around the braking wheel. The braking wheel includes a plurality of blades that rub against the case, and increases the friction between the blades and the case by increasing the centrifugal force acting on the blades based on the high-speed rotation of the pulley in the slat descending direction.

[0018]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In the horizontal blind shown in FIGS. 1 and 2, a plurality of slats 3 are suspended from a head box 1 via a plurality of ladder cords 2, and a lower end of the ladder cord 2 is provided at the lower end. The bottom rail 4 is suspended and supported.

A plurality of support members 5 are provided in the head box 1, and a drum 6 is rotatably supported by the support members 5. The upper end of the ladder cord 2 is attached to the drum 6, and an angle adjusting shaft 7 is inserted into the center of the drum 6. Accordingly, when the angle adjusting shaft 7 is rotated, the drum 6 is rotated, and with the rotation of the drum 6, one of the ladder cords 2 is pulled up, so that the slats 3 and the bottom rail 4 are angled in phase. Adjusted.

At one end of the head box 1, an operation rod 8 is suspended and supported. When the operation rod 8 is rotated, the angle adjusting shaft 7 is rotated via a gear mechanism 9 disposed in the head box 1 as shown in FIG. Therefore, the angle of each slat 3 can be adjusted by rotating the operation rod 8.

An elevating cord 10 penetrates both sides of the slat 3, and one end of the elevating cord 10 is attached to the bottom rail 4. The other end of the lifting cord 10 is guided through the support member 5 in the head box 1 toward the gear mechanism 9. Then, it is inserted into the operation rod 8 through a self-weight drop prevention device, which will be described later, provided in the gear mechanism 9, and the tip thereof is connected to the cord equalizer 11.

Therefore, as shown by a chain line in FIG. 1, by pulling down the cord equalizer 11 and pulling out the lifting cord 10 from the head box 1, the bottom rail 4 can be pulled up and the slat 3 can be pulled up. Then, when the pulling out operation of the lifting cord 10 is stopped, the self-weight drop prevention device is activated, and the bottom rail 4 and the slat 3
Is prevented from falling due to its own weight, and the slat 3 is suspended and supported at a desired position.

When the operation rod 8 is pulled downward along its longitudinal direction, the operation of the self-weight drop prevention device is released, and the bottom rail 4 and the slat 3 are lowered by their own weight.

The input shaft 12 of the gear mechanism 9 protrudes from the opening of the head box 1, and the operating rod 8 is suspended from the tip of the input shaft 12 via a universal joint 13. The opening of the head box 1 is covered with a cover 14 through which the input shaft 12 is inserted.

As shown in FIG. 3, a support case 15 of the gear mechanism 9 is fixed in the head box 1, and the input shaft 12 is rotatable on the support case 15 and is movable up and down in the axial direction. Supported.

An enlarged diameter portion 16 is formed at the upper end of the input shaft 12, and a spur gear 17 is engraved on the outer periphery of the enlarged diameter portion 16. A coil spring 25 is provided between the bearing portion of the support case 15 that rotatably supports the input shaft 12 and the enlarged diameter portion 16. And the input shaft 12
Is lowered, the coil spring 25 is compressed, and the input shaft 12 is urged upward with the support case 15 as a fulcrum.

A first intermediate gear 18 is rotatably supported by the support case 15 on the side of the enlarged diameter portion 16. The first intermediate gear 18 is formed of a spur gear, and meshes with the spur gear 17 of the enlarged diameter portion 16.

On the side of the first intermediate gear 18,
A second intermediate gear 19 is rotatably supported by the support case 15. The second intermediate gear 19 is supported such that its axis is inclined at 45 degrees with respect to the axis of the first intermediate gear 18, and the second intermediate gear 19 has a lower portion below the first intermediate gear 18.
The helical gear 20 meshing with is formed.

A worm 21 is engraved on the upper part of the second intermediate gear 19, and a worm wheel 22 rotatably supported by the support case 15 meshes with the worm 21.

The central portion of the worm wheel 22 is formed in a hollow shape, and the angle adjusting shaft 7 is inserted therethrough. On one end surface of the worm wheel 22, a gentle mountain-shaped unevenness 23a is continuously formed in the circumferential direction, and a similar unevenness 23b is formed on an end surface of the clutch member 24 facing one end surface of the worm wheel 22. Are engaged with each other.

The clutch member 24 is connected to the support case 15
Is urged to the worm wheel 22 by the biasing force of the coil spring 26, and a rotational torque of a certain value or less is transmitted from the worm wheel 22 to the clutch member 24. When the rotational torque transmitted from the worm wheel 22 to the clutch member 24 exceeds a certain value, the clutch member 24 reciprocates in the axial direction and the unevenness 23
a and 23b are idle.

A hexagonal hole 27 is formed at the center of the clutch member 24. The hexagonal hole 27 has the angle adjusting shaft 7
Is inserted. Therefore, when the clutch member 24 is rotated, the angle adjusting shaft 7 is rotated.

Above the spur gear 17 of the input shaft 12, a pulley 28 is rotatably supported by the support case 15 via a support shaft 29. The support shaft 29 is supported in a direction orthogonal to the longitudinal direction of the head box 1, and the pulley 28 is rotatably supported along the longitudinal direction of the head box 1. Knurls are engraved on the outer peripheral surface of the pulley 28.

On the side of the pulley 28, a stopper cam 30 is supported by the support case 15 via a support shaft 31 so as to be rotatable in the vertical direction. That is, the stopper cam 30 has its base end rotatably supported by a support shaft 31 supported in a direction perpendicular to the longitudinal direction of the head box 1, and its distal end faces the outer peripheral surface of the pulley 28. ing. A knurled tooth surface 32a is formed below the opposing surface, and a flat surface 32a is formed on the upper surface.
b is formed.

When the stopper cam 30 is rotated upward from the state where the tip of the stopper cam 30 is located below the pulley 28, the minimum distance between the pulley 28 and the tooth surface 32a of the stopper cam 30 is as follows. The lifting code 1
It is set to be sufficiently smaller than the diameter of 0.

A support shaft 31 for supporting the stopper cam 30
, A torsion coil spring 33 is wound, and one end of the torsion coil spring 33 contacts the support case 15 and the other end contacts the stopper cam 30. The stopper cam 30 is constantly urged upward by the urging force of the torsion coil spring 33 with the support case 15 as a fulcrum.

As shown in FIG. 5, the stopper cam 30
On one side, a drive arm 34 is formed. The drive arm 34 has a base end located below the support shaft 31,
The tip extends diagonally upward, and the tip is
A locking shaft 35 protruding in the axial direction is formed.

A locking recess 36 is formed on the upper surface of the stopper cam 30, and a rotation restricting shaft 37 that engages with the locking recess 36 is formed on the upper part of the support case 15. The stopper concave portion 36 of the stopper cam 30 has the rotation regulating shaft 3.
When engaged with 7, further rotation is prevented.

A release plate 38 is provided behind the support case 15. As shown in FIG. 5, the release plate 38 is formed with an engagement portion 39 which can be engaged with the locking shaft 35 of the stopper cam 30. The base end of the release plate 38 is bent at a right angle, An annular portion 40 through which the input shaft 12 can be inserted is formed.

As shown in FIG. 3, the input shaft 12 is inserted through the annular portion 40 of the release plate 38, and the annular portion 40
Is supported between the coil spring 25 and the enlarged diameter portion 16. Therefore, the release plate 38 moves up and down integrally with the input shaft 12.

When the input shaft 12 is at the upper limit position due to the urging force of the coil spring 25, the engaging concave portion 36 of the engaging portion 39 of the release plate 38 is engaged with the rotation regulating shaft 37. The stopper cam 30 is set to be located above the locking shaft 35.

When the input shaft 12 is pulled down against the urging force of the coil spring 25 and the release plate 38 moves downward, the engaging portion 39 of the release plate 38 engages with the locking shaft 35 of the stopper cam 30. At the same time, the stopper cam 30 is rotated downward.

When the input shaft 12 moves upward and returns to the original position by the biasing force of the coil spring 25, the locking recess 36 engages with the rotation regulating shaft 37 by the biasing force of the torsion coil spring 33. The stopper cam 30 is rotated upward until the stopper cam 30 rotates.

Therefore, the pulley 28 and the stopper cam 30
The lifting cord 10 is inserted between the pulley 28 and the stopper cam 30 from within the head box 1 and the input rod 12 passes through the input shaft 12.
Will be guided inside.

A brake device 42 is provided in the head box 1 on the side of the self-weight drop prevention device 41. A case 43 of the brake device 42 is fixed to the head box 1, and a fixed pulley 44 is rotatably supported by the case 43.

Above the fixed pulley 44, a movable pulley 45 is rotatably provided and a slot 4 provided in the case 43.
6, the head box 1 is supported so as to be movable in the longitudinal direction. A knurl is engraved on the outer peripheral surface of the movable pulley 45.

Next, the operation of the operating device configured as described above will be described. When the angle of the slat 3 is adjusted, when the operation rod 8 is rotated to rotate the input shaft 12, the worm wheel 22 is rotated via the first and second intermediate gears 18 and 19. . Then, the clutch member 24 is rotated, the angle adjusting shaft 7 is rotated, and the angle of the slat 3 is adjusted via the ladder cord 2.

At this time, if an excessive rotational torque acts between the worm wheel 22 and the clutch member 24, idle rotation occurs between the worm wheel 22 and the clutch member 24, and the rudder of the gear mechanism 9 or the support member 5 Breakage of the cord 2 support portion and the like is prevented beforehand.

When the slat 3 is pulled up, when the cord equalizer 11 is pulled downward, the lifting cord 10 between the pulley 28 and the stopper cam 30 is moved downward, and the stopper cam 30 receives the urging force of the torsion coil spring 33. It is turned downward in opposition to the state shown in FIG.

Then, the lifting cord 10 can be moved downward, and when the lifting cord 10 is pulled out from the head box 1, the bottom rail 4 is pulled up and the slat 3 is pulled up.

After raising the slat 3 to the desired position,
When the cord equalizer 11 is released, the lifting cord 10 in the operation rod 8 tends to be drawn into the head box 1 due to the weight of the bottom rail 4 and the slat 3. Then
The stopper cam 30 is rotated upward by the urging force of the torsion coil spring 33, and as shown in FIG. 3, the lifting cord 10 is moved between the tooth surface 32a of the stopper cam 30 and the pulley 28.
Is pinched. Therefore, the lifting cord 10 is prevented from being drawn into the head box 1, and the slat 3 is suspended and supported at a desired position.

When lowering the slat 3, the operating rod 8 is pulled downward. Then, the input shaft 12 is pulled down, and the release plate 38 moves downward. With the movement of the release plate 38, the locking shaft 35 of the stopper cam 30 is pulled down, so that the stopper cam 30 is rotated downward.

Then, as shown in FIG. 6, the pinch of the lifting cord 10 between the pulley 28 and the tooth surface 32a of the stopper cam 30 is released, and the lifting cord 10 is drawn into the head box 1. Then, the slat 3 is lowered by lowering the bottom rail 4.

At this time, the pulley 28 is moved from the brake device 42
The movable pulley 45 approaches the fixed pulley 44 as the speed of the elevating cord 10 moving toward the movable pulley 45 becomes faster. And, as the movable pulley 45 approaches the fixed pulley 44, the lifting / lowering cord 1 moves between the movable pulley 45 and the fixed pulley 44.
Since 0 is bent at an acute angle, friction between the lifting cord 10 and the fixed pulley 44 and the movable pulley 45 increases, and the moving speed of the lifting cord 10 is suppressed.

Accordingly, the moving speed of the lifting cord 10 is suppressed to a certain value or less by the brake device 42, so that the lowering speed of the bottom rail 4 can be suppressed to a certain value or less. As a result, a sudden drop of the bottom rail 4 is prevented, and noise due to a collision between the bottom rail 4 and another object during the slat lowering operation can be prevented. Further, the brake device 42 can be realized with a simple configuration.

7 to 9 show another example of the brake device. In this brake device, a support shaft 48 is rotatably supported by a case 47 fixed to the head box 1, and one end of the support shaft 48 is fitted to the center of a braking wheel 49.

The braking wheel 49 is formed in an impeller shape from a synthetic resin, and is housed in the case 47 with the tip of each blade 49a bent in the same direction. Therefore, the braking wheel 4
9 shows that when rotating in the direction of arrow A, friction with the inner peripheral surface of the case 47 does not increase even if the rotation is accelerated,
When trying to rotate in the direction, the centrifugal force
The friction between 9a and the inner peripheral surface of case 47 increases.

A pulley 50 is fitted to the other end of the support shaft, and the lifting cord 10 is mounted on the pulley 50. Accordingly, when the lifting cord 10 moves, the pulley 50 is rotated, and when the pulley 50 is rotated, the braking wheel 49 is rotated.

When the lifting cord 10 is pulled out of the head box 1, the braking wheel 49 is rotated in the direction of arrow A, and when the lifting cord 10 is pulled into the head box 1 by the weight of the bottom rail 4 and the slat 3, braking is performed. The wheel 49 is set to be rotated in the direction of arrow B.

With this configuration, when the slat 3 is lowered, if the moving speed of the lifting / lowering cord 10 increases,
Since the friction between the braking wheel 49 and the case 47 increases, the moving speed of the lifting cord 10 can be suppressed to a certain value or less. Therefore, the same operation and effect as those of the brake device 42 can be obtained.

In the blind operating device as described above,
The following operation and effect can be obtained. (A) The angle of the slat 3 can be adjusted by rotating the operation rod 8. The slat 3 can be lowered by pulling the operation rod 8 downward. (B) By simply pulling the operating rod 8 downward, the lowering operation of the slats 3 can be easily performed, and when the slats 3 are adjusted in angle after the lowering operation of the slats 3, the operating rods 8 are both used. , The slat 3 can be quickly operated. (C) The lifting operation of the slat 3 can be performed by pulling out the lifting cord 10 from the operation rod 8. (D) The lifting cord 10 is guided from the input shaft 12 through the pulley 28 in the longitudinal direction of the head box 1. Therefore, the maneuvering of the lifting / lowering cord 10 in the self-weight descent prevention device 41 is simplified, and the resistance acting on the lifting / lowering cord 10 moving in the self-weight descent prevention device 41 is reduced, so that the lifting / lowering operation of the slat 3 is performed smoothly and It can be performed with a small operating force. (E) By reducing the resistance acting on the lifting / lowering cord 10 in the self-weight effect prevention device 41, the lowering speed of the bottom rail 4 and the slat 3 is increased when the slat 3 is lowered. Since the moving speed is suppressed to a certain value or less, it is possible to prevent noise due to collision between the bottom rail 4 and another object during the slat descent operation.

[0062]

As described above in detail, according to the present invention, the operation of the slat self-weight drop prevention device disposed in the head box is released by operating the operation rod for adjusting the slat angle. It is possible to provide a horizontal blind operating device that enables the slat to be lowered and allows the slat to be raised and lowered smoothly and with a small operating force.

[Brief description of the drawings]

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

FIG. 2 is a side view of a horizontal blind.

FIG. 3 is a sectional view of a self-weight drop prevention device, a gear mechanism, and a brake device.

FIG. 4 is a cross-sectional view showing the operation of the self-weight drop prevention device and the brake device.

FIG. 5 is an exploded perspective view of the self-weight drop prevention device.

FIG. 6 is a cross-sectional view showing the operation of the self-weight drop prevention device and the brake device.

FIG. 7 is a sectional view showing another example of the brake device.

FIG. 8 is a sectional view showing another example of the brake device.

FIG. 9 is a cross-sectional view showing another example of the brake device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Head box 2 Rudder cord 3 Slat 4 Bottom rail 7 Angle adjustment axis 8 Operating rod 10 Lifting cord 28 Self-weight drop prevention device (pulley) 30 Self-weight drop prevention device (stopper cam) 42 Brake device

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-6-117170 (JP, A) JP-A 61-102798 (JP, U) JP-A 1-100897 (JP, U) (58) Field (Int.Cl. ⁷ , DB name) E06B 9/322 E06B 9/324

Claims (3)

(57) [Claims] 1. A multi-stage slat is suspended from a head box via a ladder cord, and an operation rod suspended from one side of the head box is rotated to rotate an angle adjusting shaft in the head box. By allowing the slats to adjust the angle via the ladder cord, pulling up and down cords hanging from one side of the head box from the head box, thereby pulling up the bottom rail and raising the slats, The slats can be lowered by pulling the lifting cord into the head box by the weight of the rail and the slat, and the movement of the lifting cord by the slat's own weight is always prevented. Horizontal bra with self-weight drop prevention device that allows the lifting cord to move In India, a brake device is provided in the head box for lowering a moving speed of the lifting / lowering cord when the slat is lowered, and the brake device is rotatably supported in the head box. A fixed pulley, and a movable pulley supported so as to be movable in the moving direction of the lifting / lowering cord while being capable of guiding the lifting / lowering cord in a bent state in cooperation with the fixed pulley. Operating device for horizontal blinds. 2. A plurality of slats are suspended from a head box via a ladder cord, and an operation rod suspended from one side of the head box is rotated to rotate an angle adjusting shaft in the head box. By allowing the slats to adjust the angle via the ladder cord, pulling up and down cords hanging from one side of the head box from the head box, thereby pulling up the bottom rail and raising the slats, The slats can be lowered by pulling the lifting cord into the head box by the weight of the rail and the slat, and the movement of the lifting cord by the slat's own weight is always prevented. Horizontal bra with self-weight drop prevention device that allows the lifting cord to move In India, the headbox is provided with a brake device for lowering a moving speed of the lifting code during a lowering operation of the slat, the brake device being mounted with the lifting code, A pulley that rotates with the movement of the pulley; and a braking device that applies a braking force to the pulley based on a high-speed rotation of the pulley in the slat-down direction, the operating device for a horizontal blind, comprising: . 3. The braking device comprises: a braking wheel fitted to a spindle that rotates with the rotation of the pulley; and a case disposed around the braking wheel. A plurality of blades that rub against the case, wherein the friction between the blades and the case is increased by increasing the centrifugal force acting on the blades based on the high speed rotation of the pulley in the slat descent direction. The operating device for a horizontal blind according to claim 2.