JPH03221691A - Motor-driven blind - Google Patents

Abstract

PURPOSE:To improve the controllability of blind operation by providing and controlling independently a blind slat lifting motor and a slat angle adjusting motor. CONSTITUTION:When a lifting switch 21 or lowering switch 23 of a controller 2 is turned ON, a current is supplied to a lifting motor 4 to rotate a lift shaft 13, and the rotation of the lift shaft 13 is transmitted to a rotary drum 9 and an encoder drum 11. A take-up drum 9 takes up or unwinds a lifting tape 15 to vertically move a bottom rail 18 and a slat 17. When an opening switch 24 or closing switch 25 of the controller 2 is turned ON, a current is supplied to a slat adjusting motor 5 to rotate a tilt shaft 14 and the rotation of the tilt shaft 14 is transmitted to a tilt drum. Further, a ladder code 16 is taken up or unwound to adjust the opening and closing angle of the slat 17.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an electric blind, and more particularly to a mechanism for raising and lowering and adjusting the angle of a plurality of blades of the blind using an electric motor.

[Conventional technology] FIG. 4 is a partial structural diagram of a conventional electric blind.

Such electric blinds are manufactured by the Japanese Patent Publication Publication No. 63-1
This is shown in, for example, Publication No. 67884. Referring to Figure 3, an electric blind has a plurality of band-shaped blades (slats).
are arranged in a row at a predetermined distance. Electric blinds are attached to the windows of buildings and function to allow or block light from outside into the room. Also,
When daylight comes in from the entire surface of a window, the slats of the electric blind are rolled up at the top of the window.

Depending on the use of such electric blinds, electric blinds are equipped with a slat lifting mechanism and a slat opening/closing mechanism.

The slat elevating mechanism is connected to a bottom rail (not shown) located at the bottom of a plurality of slats, and includes an elevating tape 101 that passes through a predetermined opening of the slat, and a winding tape that winds and unwinds the elevating tape 101. A take-up drum 104 is provided.

The slat opening/closing mechanism includes a ladder cord 102 that is connected to the front edge and a rear edge of each of the plurality of slats 106 and connects the plurality of slats 106, a tilt drum 105 around which the ladder cord 102 is wound, and a tilt drum 105.
The encoder drum 109 rotates integrally with the encoder drum 109, and photointerrupters 107 and 108 detect the amount of rotation of the encoder drum 109 and output various control signals.

A winding drum 104 included in the slat lifting mechanism and a tilt drum 105 and encoder drum 109 included in the slat opening/closing mechanism are provided on the same lifting shaft 103. The winding drum 104 is connected to the lifting shaft 1.
03, and the tilt drum 105 is provided so as to be slidable with respect to the elevating shaft 103. Further, the winding drum 104 and the tilt drum 105 are configured to rotate together to a predetermined position due to a constant frictional force. The rotation range of the tilt drum 105 is slat 1.
06 rotation angle (approximately 180°). Therefore, when the rotation limit position of the tilt drum 105 is reached, the winding drum 104 and the tilt drum 10
5 slips, and the rotation of the tilt drum 105 stops.

Next, the operation of the electric blind will be explained.

- For example, when the blinds are lowered and the slats are opened at a predetermined angle, allowing light into the room,
Describe the state in which the blind is rolled up above the window. First, the blind lift switch is turned on,
As the drive motor rotates, the elevating shaft 103 rotates in a predetermined direction. As a result, the winding drum 104 and the tilt drum 105 connected to the winding drum 104 by frictional force begin to rotate. Tilt drum 105
The ladder cord 102 moves due to the rotation of the slat 1.
The blade angle of 06 moves to the closed state. Further, when the elevating shaft 103 rotates, the rotation of the tilt drum 105 is stopped and the tilt drum 105 starts to slip with the winding drum 104. The winding drum 104 rotates in synchronization with the rotation of the lifting shaft 103 and winds up the lifting tape 101. By winding up the elevating tape 101, the plurality of slats 106 are sequentially rolled up from the bottom. The winding operation of the blind ends when the bottom rail (not shown) reaches the uppermost end.

[Problems to be Solved by the Invention] As described above, in the conventional electric blind, in order to raise or lower the blind that has been adjusted to a predetermined slat angle, it is necessary to close the slats once. For this reason, there is a problem in that when the blind is raised or lowered, daylight entering the room is blocked, resulting in large changes in illuminance in the room and causing discomfort to the occupants. Further, when adjusting the angle of the slats, the slats must be raised and lowered at the same time, and there is a problem in that it is difficult to control the raised and lowered state of the blind at will.

Therefore, this invention was made to solve the above-mentioned problems, and an object of the present invention is to provide an electric blind in which the raising and lowering operation of the electric blind and the angle adjustment of the slats can be performed separately. .

[Means for Solving the Problems] The electric blind according to the present invention utilizes the rotational force of an electric motor to raise and lower a plurality of blades of the blind, and to change the angle of the plurality of blades to block light and pass light. A first connecting member that connects a plurality of blades in alignment at predetermined intervals, and a first connecting member that engages with the first connecting member and performs opening and closing operations.
What are the angle adjusting rotating member that moves the connecting member to relatively move the leading edge and the trailing edge of the plurality of blades in the vertical direction, a first electric motor that provides a driving force to the angle adjusting rotating member, and the first electric motor? A second electric motor provided independently, a rotating member for lifting and lowering that rotates in conjunction with the second electric motor, and a rotating member for lifting and lowering that is located at the bottom of the plurality of blades and moves up and down to raise and lower the plurality of blades. The second connecting member connects the lifting member and the rotating member for lifting and lowering.

[Operation] The electric blind according to the present invention includes two electric motors. The first electric motor moves a first connecting member connected to a plurality of blades of the blind to adjust the angle of the blades. Further, the second electric motor raises and lowers the lifting member located at the lowest part of the blades of the blind, thereby winding up and exposing the blades. By providing the first and second electric motors independently, it becomes possible to independently adjust the angle of the blades of the blind and raise and lower the blind. Therefore, it is possible to prevent the blind from moving up and down when adjusting the angle of the blades of the blind, or from changing the angle of the blades and changing the amount of daylight when the blind goes up and down.

[Example] An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is an overall structural diagram of an electric blind according to a first embodiment of the present invention, and FIG. 2 is a partial structural diagram of a drive section of the electric blind. The structure of an electric blind will be explained with reference to FIGS. 1 and 2.

Power cord 1 and controller 2 are connected to control section 3 . The controller 2 has two lift switches for commanding the blind to rise, a stop switch 22 for commanding the stop, a lowering switch 23 for commanding the blind to lower, and a command for opening the slats 17. An open switch 24 for closing the slat 17 and a close switch 25 for giving a command to close the slat 17 are provided. Control part 3
has a built-in power supply unit, microcomputer, etc., and is connected to a lifting motor 4 and a slat adjustment motor 5, which are composed of an electric motor and a reduction gear.

The lifting unit 6.7.8 includes a mechanism section consisting of a slat lifting mechanism and a slat opening/closing mechanism, and a part of a sensor.

The slat elevating mechanism of the mechanical section includes an elevating shaft 13 connected to an elevating motor 4, a winding drum 9 fixed to the elevating shaft 13, an elevating tape 15 whose one end is wound around the winding drum 9, and an elevating shaft 13 connected to an elevating motor 4. and a bottom rail 18 to which the other end of the tape is connected. The lifting tape 15 passes through the through holes formed in the plurality of slats 17 and attaches to the bottom rail 1.
A plurality of slats 17 are arranged between the winding drum 8 and the winding drum 9.

The slat opening/closing mechanism of the mechanism section includes a tilt shaft 14 connected to the slat adjustment motor 5;
a tilt gear 12 fixed to a tilt gear 12; a tilt drum 10 rotatably mounted on an elevating shaft 13 and engaged with the tilt gear 12; and a ladder cord 16.

A portion of the sensor includes an encoder drum 11 mounted on the lifting shaft 13, a photointerrupter 27 that detects the amount of rotation of the winding drum 9, and a photointerrupter 28 that detects the amount of rotation of the tilt drum 10. Further, the lifting unit 6.8 is provided with an upper limit switch 26 for detecting the upper limit position of the blind, and a slack detection device (not shown) for detecting slack or breakage of the lifting tape 15. Note that the lifting unit 7 is not provided with a portion of the sensor.

A part of the sensor is connected to the control section 3 by a wiring material 20.

The upper part of the lifting unit 6, 7, 8 etc. is the head box 1
Covered by 9. Therefore, the lifting unit 6.7.
8, lifting motor 4, slat adjustment motor 5, etc. are shielded from the outside, and an upper limit switch 26 is installed on the bottom surface.
protruding protrusions.

Next, the operation of the electric blind will be explained.

When the rise switch 21 or the fall switch 23 of the controller 2 is turned on, the lift motor 4 is energized and the lift shaft 13 rotates. The rotation of the lifting shaft 13 is transmitted to the winding drum 9 and the encoder drum 11, and the winding drum 9 winds up or unwinds the lifting tape 15, and the bottom rail 18 and the slats 17 move up and down. Simultaneously with this lifting/lowering operation, the photointerrupter 27 provided in the lifting/lowering unit 6 detects the amount of rotation of the encoder drum 11. At this time, the tilt drum 10 does not rotate due to the static torque of the slat adjustment motor 5. Therefore, the angle of the slat 17 also does not change.

Next, when the slat open switch 24 or the close switch 25 of the controller 2 is turned on, the slat adjustment motor 5
is energized, and the tilt shaft 14 rotates. The rotation of the tilt shaft 14 is transmitted to the tilt drum 10 via the tilt gear 12.

The tilt drum 10 winds up or lowers the ladder cord 16 to adjust the opening/closing angle of the slats 17.

Simultaneously with this rotational movement of the tilt drum 10, a photointerrupter 28 provided in the elevating unit 6 detects the rotation angle of the tilt drum 10. At this time, the winding drum 9 does not rotate due to the static torque of the lifting motor 4. Therefore, the slats 17 are not moved up and down.

As described above, the electric blind according to the embodiment of the present invention is independently equipped with a slat lifting motor and a slat angle adjusting motor, so that the slat lifting operation and the slat opening/closing operation can be performed independently. Note that for blinds of the same size, the torque required for slat angle control and slat elevation control is smaller for slat angle control. Therefore, the slat angle adjusting motor 5 may be smaller than the lifting motor 4, and the inertial force of the motor rotor is also small, so that the controllability of the slat angle control is improved.

Next, the structure of an electric blind according to a second embodiment of the present invention will be explained using FIG. 3.

In the second embodiment, the tilt drum 10 is fixed directly to the tilt shaft 14. The ladder cord 16 is wound around the tilt drum 10 attached to the tilt shaft 14.

Therefore, the angle of the slat is adjusted by directly rotating the tilt drum 10 via the tilt shaft 14 attached to the slat adjustment motor 5.

Therefore, as in the first embodiment, the tilt shaft 14
A gear transmission mechanism for transmitting the rotational force of 1 to the tilt drum 10 attached to the lifting shaft 13 can be omitted. Note that the angle sensor for detecting the rotation angle of the tilt drum 10 can be provided integrally inside the slat adjustment motor 5, or can be provided on the tilt shaft 14 near the motor.

[Effects of the Invention] As described above, the electric blind according to the present invention is configured such that the motor for raising and lowering the slats of the blind and the motor for adjusting the slat angle are independently provided and independently controlled. It is possible to operate the blind without a change in the amount of daylight due to a change in the angle of the slat, and without raising or lowering the blind when the angle of the slat changes, improving controllability of the operation of the blind.

[Brief explanation of the drawing]

FIG. 1 is an overall configuration diagram of an electric blind according to a first embodiment of the present invention. FIG. 2 is a partial structural diagram of the electric blind shown in the construction drawing. FIG. 3 is a partial structural diagram of an electric blind according to a second embodiment of the present invention. FIG. 4 is a partial structural diagram of a conventional electric blind. In the figure, 3 is a control unit, 4 is a lifting motor, 5 is a slat adjustment motor, 6.7.8 is a lifting unit, and 9.104
is the winding drum, 10,105 is the tilt drum, IL10
9 is the encoder drum, 12 is the tilt gear, 13.10
3 is the lift shaft, 14 is the tilt shaft, 15.10
1 is the lifting tape, 16.102 is the ladder cord, 17.
106 is the slat, work 8 is the bottom rail, 27.28.
107 and 108 indicate photointerrupters. Note that the same reference numerals in the figures indicate the same or corresponding parts. Figure 2 Figure 3 n

Claims (1)

[Scope of Claims] An electric blind that uses the rotational force of an electric motor to raise and lower a plurality of blades of the blind, and to open and close the blind by changing the angle of the blades to block light and allow light to pass through. a first connecting member that aligns and connects the plurality of blades at predetermined intervals; and a first connecting member that engages with the first connecting member and moves the first connecting member to connect the front and rear edges of the plurality of blades. a rotating member for adjusting the angle that moves the edge relative to the rotating member in the vertical direction; a first electric motor that provides a driving force to the rotating member for adjusting the angle; a second electric motor that is provided independently of the first electric motor; a rotating member for lifting and lowering that rotates in conjunction with a second electric motor; a lifting member that is located at the lowest part of the plurality of blades and moves up and down to raise and lower the plurality of blades; and the lifting and lowering member An electric blind comprising a second connecting member that connects the member and the lifting rotating member.