JPH06146752A - Slat driving device of motorized blind - Google Patents

Abstract

PURPOSE:To move up and down slats without tilting them, although the slats can be lifted up or down, and the inclined angle can be adjusted. CONSTITUTION:Pullies 7a, 7b are rotated to move up and down slats 6 through the slat drive shaft 3 by a motor 2 arranged in a head box 1. A tilt drum 4 is rotated and respective slats 6 are tilted in the same phase in accordance with the rotation of the slat drive shaft 3. A clutch which makes the slat drive shaft 3 run idle against the tilt drum 4 when the slats 6 are tilted up to the perpendicular state, is interposed between the slat drive shaft 3 and the tilt drum 4. The motor 2 is actuated by either a lift signal SG1 for moving up and down the slats 6 or an operation signal SG2 for adjusting the angle of slats 6 and a brake 13 is equipped in the head box 1 to prohibit the rotation of tilt drum 4, being based on the lift signal SG1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a slat drive device for an electric blind, which raises and lowers and adjusts the angle of a horizontal blind slat by a driving force of a motor.

[0002]

2. Description of the Related Art Conventionally, as one type of electric blinds,
There is one shown in FIG. That is, the motor 2 is arranged in the head box 1, and the slat drive shaft 3 is rotated by the operation of the motor 2.

A tilt drum 4 is attached to the slat drive shaft 3.
Is attached, a ladder cord 5 is suspended from the tilt drum 4, and a large number of slats 6 are supported on the ladder cord 5. When the slat drive shaft 3 is rotationally driven, the slats 6 are tilted in the same phase via the tilt drum 4 and the ladder cord 5, and when the slats 6 are tilted in the vertical direction, the tilt drum 4 and the slats are slid. The slat drive shaft 3 idles with respect to the tilt drum 4 by the action of the clutch device which is interposed between the drive shaft 3 and does not transmit torque exceeding a predetermined value, so that each slat 6 does not tilt further. It has become.

The slat drive shaft 3 is formed in the shape of a hexagonal rod, and the slat drive shaft 3 is fitted in the central portions of the spiral pulleys 7a and 7b. And the spiral pulleys 7a, 7b
Are rotatably supported integrally with the slat drive shaft 3 and axially movable.

Screws are engraved on the outer peripheral surfaces of the spiral pulleys 7a and 7b, and the screws are screwed into an elevating device 8 fixed in the head box 1. Further, the upper ends of the lifting cords 9a and 9b are tied to one ends of the spiral pulleys 7a and 7b.

Therefore, when the slat drive shaft 3 is rotated in the slat pull-up direction, the spiral pulleys 7a and 7b are moved in the axial direction of the slat drive shaft 3 while rotating, and the lifting cords 9a and 9b are moved to the spiral pulley 7a. , 7b in a spiral shape and sequentially pulled up from the lower slats 6. Further, when the slat drive shaft 3 is rotated in the slat descending direction, the elevating cords 9a, 9b move the spiral pulleys 7a, 7b.
It is rewound from b and the slats 6 are lowered.

[0007]

However, in the above-mentioned electric blind, since the slats 6 are tilted in the vertical direction when the slats 6 are moved up and down, when the slats 6 are moved up and down, the lifting cords 9a, 9b 6 slats
The periphery of the elevating cord insertion hole is rubbed.

Therefore, abnormal noise is generated during the lifting operation,
Alternatively, the lifting cords 9a and 9b may be broken due to wear and the like. Further, after the slat 6 is moved up and down to a desired height, it is necessary to reversely rotate the motor 2 to adjust the angle of the slat 6 to a desired angle, which is complicated to operate.

Therefore, an electric blind has been proposed in which the raising and lowering operation of the slat 6 and the angle adjusting operation of the slat 6 are independently performed by using different motors. However, in such an electric blind, it is necessary to house two motors in the head box 1, and house a drive shaft for raising and lowering the slat and a drive shaft for adjusting the slat angle in the head box 1. Therefore, there is a problem that the head box 1 becomes large and the configuration of the slat driving device becomes complicated.

It is an object of the present invention to provide a slat driving device which enables a slat lifting operation and an angle adjusting operation using a common motor, and also allows the slat lifting operation without tilting. .

[0011]

In order to achieve the above-mentioned object, the present invention suspends and supports a large number of stages of slats from a head box via ladder cords, and raises and lowers cords for raising and lowering each of the slats. It is inserted through a slat, the ladder cord is supported by a tilt drum arranged in the head box, the lifting cord is supported by a pulley arranged in the head box, and the lifting cord of a motor arranged in the head box is supported. The slat drive shaft is rotated by the driving force, and the pulley is rotated based on the rotation of the slat drive shaft to wind up or down the lifting cord, or rewind to raise or lower the slat, and based on the rotation of the slat drive shaft. By rotating the tilt drum, the slats can be tilted in the same phase, and the slats are vertically arranged between the slats drive shaft and the tilt drum. In an electric blind having a clutch device that idles a slat drive shaft with respect to a tilt drum when tilted to a state, the motor has either an up-and-down operation signal for raising or lowering the slat or an angle-adjusting operation signal for adjusting the angle of the slat. And a brake device for preventing rotation of the tilt drum based on the lifting operation signal is provided in the head box.

[0012]

By the above means, the brake device is actuated to prevent the tilt drum from rotating when the slats are moved up and down. Therefore, when the slat is raised or lowered, the slat is raised or lowered without being tilted.

[0013]

FIG. 1 shows an embodiment of the present invention. The same components as those in the conventional example will be described with the same reference numerals.

In the electric blind shown in FIG. 1, a motor 2 is arranged in a head box 1. The motor 2 is activated when either an up / down operation signal SG1 of the slat 6 output from an operation switch (not shown) or an angle adjustment operation signal SG2 of the slat 6 output from the operation switch is input. Then, the slat drive shaft 3 is rotated by the operation of the motor 2.

A tilt drum 4 is attached to the slat drive shaft 3.
Is attached, a ladder cord 5 is suspended from the tilt drum 4, and a large number of slats 6 are supported on the ladder cord 5. When the slat drive shaft 3 is rotationally driven, each slat 6 is tilted in the same phase via the tilt drum 4 and the ladder cord 5, and when each slat 6 is tilted in the vertical direction, the clutch device tilts the tilt. Idling occurs between the drum 4 and the slat drive shaft 3 so that each slat 6 does not tilt further.

The slat drive shaft 3 is formed in the shape of a hexagonal rod, and the slat drive shaft 3 is fitted and inserted in the central portions of the spiral pulleys 7a and 7b. And the spiral pulleys 7a, 7b
Are rotatably supported integrally with the slat drive shaft 3 and axially movable.

Screws are engraved on the outer peripheral surfaces of the spiral pulleys 7a and 7b, and the screws are screwed into an elevating device 8 fixed in the head box 1. Further, the upper ends of the lifting cords 9a and 9b are tied to one ends of the spiral pulleys 7a and 7b.

A first gear 10 is fixed to the tilt drum 4 and is rotatable integrally with the tilt drum 4. The head box 1 has a brake shaft 11
Is rotatably supported, its brake shaft 11 is fixed through the center of the second gear 12, and the second gear 12 meshes with the first gear 10.

Therefore, when the tilt drum 4 is rotated,
The brake shaft 11 is rotated via the first and second gears 10 and 12. A brake device 13 is connected to one end of the brake shaft 11. The brake device 13 uses, for example, the operation of an electromagnetic solenoid, and operates when the lifting operation signal SG1 output from the operation switch is input to prevent the brake shaft 11 from rotating.

In the electric blind constructed as described above, the lifting operation signal SG1 is input to the motor 2 and the brake device 13 when the slat 6 is moved up and down. Then, the brake device 13 prevents the brake shaft 11 from rotating. Therefore, the second gear 12
The rotation of the tilt drum 4 is prevented via the first gear 10.

In this state, when the motor 2 is operated based on the lifting operation signal SG1, the slat drive shaft 3 idles with respect to the tilt drum 4, and the spiral pulleys 7a and 7b rotate as the slat drive shaft 3 rotates. While moving, the lifting cords 9a and 9b are spirally wound or unwound on the spiral pulleys 7a and 7b.

Therefore, when the slat 6 is moved up and down, the slat 6 is moved up and down without being tilted. On the other hand, during the angle adjusting operation of the slat 6, the lifting operation signal SG1 is not input to the brake device 13, so the operation of the brake device 13 is released, and the tilt drum 4 becomes rotatable with the slat drive shaft 3. Therefore, the motor 2 is operated based on the angle adjustment operation signal SG2, the tilt drum 4 is rotated through the slat drive shaft 3, and the slat 6 is tilted in the vertical direction.

As described above, in this electric blind, the brake device 13 can be operated to prevent the tilt drum 4 from rotating when the slat 6 is moved up and down, so that the slat 6 can be moved up and down without tilting. Therefore, since it is possible to prevent the lifting cords 9a and 9b from rubbing against the lifting cord insertion holes of the slats 6, it is possible to prevent the lifting cords 9a and 9b from being cut due to wear or the generation of abnormal noise.

Further, when the angle is adjusted, the braking device 1
Since the operation of 3 is stopped, the tilt drum 4 can be rotated via the slat drive shaft 3 by the operation of the motor 2, and the angle of the slat 6 can be adjusted.

In the above embodiment, the lifting cords 9a, 9
Although b is spirally wound around the spiral pulleys 7a and 7b, the present invention can be similarly applied to an electric blind having a structure in which the lifting tape is wound around or rewound on the pulleys to move the slats up and down. .

[0026]

As described above in detail, according to the present invention, the slat driving device is capable of raising and lowering the slats and adjusting the angles thereof by using a common motor, while allowing the slats to be raised and lowered without tilting. Can provide excellent effect.

[Brief description of drawings]

FIG. 1 is a front view showing a horizontal blind according to an embodiment.

FIG. 2 is a front view showing a conventional horizontal blind.

[Explanation of symbols]

 1 Head Box 2 Motor 3 Slat Drive Shaft 4 Tilt Drum 5 Ladder Code 6 Slat 7a, 7b Pulleys 9a, 9b Elevating Cord 13 Brake Device

Claims (1)

[Claims] 1. A multistage slat (6) is suspended from a headbox (1) via a ladder cord (5) and is supported.
A lifting cord (9) for lifting the slats (6).
a, 9b) is inserted into each slat (6), the ladder cord (5) is supported by a tilt drum (4) arranged in the head box (1), and the lifting cords (9a, 9b) are supported.
b) is a pulley (7) arranged in the head box (1)
a, 7b), the slat drive shaft (3) is rotated by the drive force of the motor (2) arranged in the head box (1), and the slat drive shaft (3) is rotated to rotate the slat drive shaft (3). Rotate the pulleys (7a, 7b) to move the lifting cord (9
a, 9b) is wound or unwound to move the slat (6) up and down, and the tilt drum (4) is rotated based on the rotation of the slat drive shaft (3) so that each slat (6) is rotated. When the slat (6) is tilted to a vertical state between the slat drive shaft (3) and the tilt drum (4), the slat drive shaft (3) is mounted on the tilt drum (4). In an electric blind having a clutch device for idle rotation, the motor (2) has an up-and-down operation signal (SG1) for moving up and down the slat (6) and an angle adjustment operation signal (SG2) for adjusting the angle of the slat (6). And a brake device (13) for blocking the rotation of the tilt drum (4) based on the lifting operation signal is provided in the head box (1). Electric blind slat drive.