JP3091136B2 - Head box lifting blinds - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a head box lifting type blind for raising and lowering a slat by lifting and lowering a head box.

[0002]

2. Description of the Related Art Conventionally, as one type of a horizontal blind,
There is a head box lifting type blind which raises and lowers a slat by raising and lowering a head box. In this head box lifting type blind, the head box is supported so as to be able to move up and down by the driving force of an electric motor, and a plurality of slats are suspended from the head box via a ladder cord.

An upper end of the ladder cord is attached to a ladder cord support in the head box, and an angle adjusting shaft is fitted into the ladder cord support.
Then, by rotating the angle adjusting shaft, the angle of each slat is adjusted in phase with the ladder cord.

[0004] When the electric motor is operated, the blind configured as described above raises or lowers the head box and raises and lowers the slats. The slats are angle-adjusted by manually rotating the angle-adjusting shaft.

[0005]

In such a horizontal blind as described above, the operation of raising and lowering the slats can be performed electrically, but the operation of adjusting the angle of the slats must be performed manually. Therefore, the operation of adjusting the angle of the slat becomes complicated.

When the slat is rotated in the vertical direction after the slat is rotated in the vertical direction, if the slat is further rotated in the same direction, the ladder cord is wound up by the ladder cord supporting portion, and the ladder cord is wound. The support part or the ladder cord may be damaged. Therefore, the slat lifting / lowering motor cannot always rotate the slat angle adjusting shaft during the slat lifting / lowering operation.

Further, if a dedicated motor for rotating and driving the angle adjusting shaft of the slat is built in the head box,
There is a problem that the size of the headbox becomes large, two motors are required, and the cost increases.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a head box lifting type blind in which a slat lifting operation and an angle adjusting operation can be performed by a common motor.

[0009]

According to the first aspect of the present invention, the lifting tape can be wound and rewound by a winding device based on the rotation of a motor, and a head box of a horizontal blind is suspended and supported by the lifting tape. The head box can be moved up and down by the operation of the motor, a plurality of slats are suspended from the head box via ladder cords, and the head box is rotatably supported in the head box. In a head box lifting type blind having a slat angle adjusting device for rotating the slat via the ladder cord based on rotation of a shaft , a pulley can be rotated on the head box.
A lifting tape that supports and pulls the pulley endlessly
At one end of the lifting tape by the motor.
The head box is raised by rewinding and rewinding.
At the same time as lowering, rotate the pulley and rotate the pulley.
A transmission shaft that rotates forward and reverse by rolling is installed in the head box,
The transmission shaft is connected to the angle adjustment shaft, and transmission is performed between the transmission shaft and the angle adjustment shaft by the forward / reverse rotation of the transmission shaft until the slat is rotated in the vertical direction. A clutch device for transmitting the rotation of the shaft to the angle adjusting shaft was provided.

[0010]

According to a second aspect of the present invention, in the clutch device, the first clutch shaft on the input side and the second clutch shaft on the output side are connected via a constant friction, and the second clutch shaft is connected to the second clutch shaft. When the slat is rotated to the vertical direction, the slat is provided with rotation preventing means for preventing rotation of the second clutch shaft.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below. As shown in FIG. 1, a motor mounting frame 2 is attached to an upper portion of a window where a head box elevating type blind is attached.

A motor 3 is provided in the mounting frame 2. The motor 3 is a double-shaft motor, and has an output shaft 4a,
4b is protruded to both sides, and the output shafts 4a and 4b are rotated in the forward and reverse directions by operating an operation switch (not shown).

The tips of the output shafts 4a and 4b are inserted into winding devices 5a and 5b for winding the elevating tape, and the elevating tapes 6 are respectively suspended from the winding devices 5a and 5b. As shown in FIG. 2, the tip of the elevating tape 6 is screwed to the mounting frame 2, and the endless edge of the elevating tape 6 is rotatably mounted on a horizontal blind head box 7 as shown in FIG. A supported hanging pulley 8 is mounted. Therefore, the head box 7
Is suspended from the mounting frame 2 via the elevating tape 6, and when the elevating tape 6 is wound up by the winding devices 5a and 5b by the driving force of the motor 3, the head box 7 is pulled up and the elevating tape 6 is wound. When returned, the head box 7 is lowered.

A support shaft 9 is fitted to both ends of the head box 7, and a guide roller 1 is attached to a tip end of the support shaft 9.
0a and 10b are rotatably supported. The guide roller 10a has a larger diameter than the guide roller 10b, and moves along the inner surface of the vertical frame 11 of the window. The guide roller 10 b is provided with a rib 1 provided in the vertical frame 11.
It moves up and down while engaging with 1a. With such a configuration, the head box 7 is immovably supported in its longitudinal direction (horizontal direction in FIG. 1) and in the thickness direction of the vertical frame 11 (direction orthogonal to the paper surface in FIG. 1), and is moved up and down in this state. You.

Each of the pulleys 8 is fitted with a hexagonal rod-shaped transmission shaft 12a, 12b, respectively.
2a and 12b are connected to the input shaft 15 of the clutch devices 14a and 14b via the connecting member 13, respectively.

The output shafts 16 of the clutch devices 14a and 14b are connected to hexagonal rod-shaped angle adjusting shafts 17 via connecting members 13, respectively. The angle adjusting shaft 17 is inserted into a support portion 29 that supports an upper end portion of the ladder cord 18,
A plurality of slats 19 are supported on the ladder cord 18. The lower end of the ladder cord 18 is connected to a bottom rail 20.

The specific structure of the clutch devices 14a and 14b will be described with reference to FIGS. A case 21 is fixed in the head box 7, and a first clutch shaft 22 and a second clutch shaft 23 are rotatably supported on the case 21. The first clutch shaft 22 is a hollow shaft, the diameter of the distal end portion is formed larger than the base end portion, the base end portion is protruded outside the case 21,
The input shaft 15 is fitted. Further, a metal washer 24 is interposed between the distal end of the first clutch shaft 22 and the inner surface of the case 21 to reduce the friction between the first clutch shaft 22 and the case 21.

The second clutch shaft 23 is a hollow shaft, and has a flange 25 at an intermediate portion. The base end of the second clutch shaft 23 projects out of the case 21, and the output shaft 16 is fitted thereto. The tip of the second clutch shaft 23 is connected to the first clutch shaft 22.
A friction material 26 is interposed between the flange 25 and the tip of the first clutch shaft 22.

The flange 25 and the second clutch shaft 23
Between the inner surface of the case 21 and the coil spring 27
And a metal washer 24. The friction material 26 is sandwiched between the flange 25 and the tip of the first clutch shaft 22 by the urging force of the coil spring 27. Therefore, when the first clutch shaft 22 is rotated,
The first clutch shaft 2
2 and the second clutch shaft 23 is rotated.

The flange 25 has a projection 25a projecting in the radial direction. The case 21 is formed with a locking portion 28 for preventing the rotation of the projection 25 a on the rotation locus of the projection 27. Therefore, the second clutch shaft 2
Numeral 3 is rotatable in a range until the protruding portion 25a comes into contact with the locking portion 28, that is, in a range of substantially one rotation from a position indicated by a solid line to a position indicated by a chain line in FIG.

When the second clutch shaft 23 is rotated, the angle adjusting shaft 17 is rotated. The support part 29
In this case, the slat 19 is set so as to be rotated by 180 degrees from the fully closed state through the ladder cord 18 when the angle adjusting shaft 17 makes substantially one rotation, so that the slat 19 is rotated within the fully closed state.

A storage guide 30 is provided below the window. The storage guide 30 guides the slats 19 directly below the head box 7 so that the slats 19 are vertically stacked as shown in FIG. 2 when the slats 19 are lowered by the lowering of the head box 7. A slope 31 is provided.

On the lower surface of both ends of the mounting frame 2, there are provided detecting pieces 32 projecting obliquely downward, and the tip of the detecting pieces 32 is inserted with the lifting tape 6 therethrough. When the head box 7 is lifted upward and comes into contact with the detection piece 32, the power supply to the motor 3 is stopped by the operation of the switch box 33 disposed in the mounting frame 2, and the head box 7 is stopped. Further pulling is prevented.

Next, the operation of the head box up-and-down type blind constructed as described above will be described. When the motor 3 is operated in the head box pulling direction, the lifting tape 6 is wound up and the pulley 8 is pulled up while rotating, so that the head box 7 is pulled up.

The rotation of the pulley 8 is controlled by the transmission shafts 12a and 12a.
b and the coupling devices 13 through the clutch devices 14a, 14b
To the input shaft 15. When the input shaft 15 is rotated, the first clutch shaft 22 is rotated, and the rotation of the first clutch shaft 22 is transmitted to the second clutch shaft 23 via the friction material 26.

Then, with the rotation of the second clutch shaft 23, the angle adjusting shaft 17 is rotated, and the slat 19 is rotated. When the slat 19 is rotated vertically,
The projection 25a formed on the flange 25 of the second clutch shaft 23 comes into contact with the locking portion 28 of the case 21, and further rotation of the second clutch shaft 23 is prevented. Then
Further rotation of the slat 19 is prevented, and the first clutch shaft 22 idles with respect to the second clutch shaft 23.
Therefore, the headbox 7 is pulled up with the slats 19 fully closed.

If the motor 3 is operated in the head box lowering direction with the head box 7 pulled up to a desired position, the pulley 8 is rotated in the reverse direction while the head box 7 is lowered. Then, the first clutch shaft 22 is rotated in the opposite direction, the rotation is transmitted to the second clutch shaft 23, and the slat 19 is rotated in the opposite direction. Therefore, if the motor 3 is operated until the slat 19 reaches a desired angle, the angle of the slat 19 can be adjusted.

When the motor 3 is further operated in the lowering direction of the head box 7, the elevating tape 6 is rewound and the pulley 8 is lowered while rotating. Therefore, the head box 7 is lowered.

At this time, when the slat 19 is rotated to the vertical direction as described above, further rotation of the second clutch shaft 23 is prevented, and the first clutch shaft 22 is moved to the second clutch shaft 23. It is in a state of idling.

With the head box lifting type blind constructed as described above, the following operational effects can be obtained. (A) Since the slats 19 can be moved up and down by moving the head box 7 up and down, the amount of light collected from the upper part of the window can be adjusted. (B) The slat 19 can be raised and lowered and the angle adjusted by the common motor 3. (C) Since the slats 19 are turned to the vertical direction during the elevating operation of the head box 7 by the operation of the clutch devices 14a and 14b, further turning of the slats 19 in the same direction is prevented. Ladder cord 18 support 2
9 and the ladder code 18 can be prevented from being damaged. (D) Both ends of the head box 7 are provided with guide rollers 10
Since the head box 7 is supported so as to be movable only in the vertical direction with respect to the vertical frame 11 of the window at a and 10b, it is possible to prevent the movement locus of the head box 7 from moving when the head box 7 moves up and down.

The clutch device connects the first clutch shaft and the second clutch shaft via a torsion coil spring, and when the slat is turned to the vertical direction,
A configuration may be adopted in which torque transmission by the torsion coil spring is invalidated and the first clutch shaft idles with respect to the second clutch shaft.

The technical ideas other than the claims that can be grasped from the above embodiment will be described below together with their effects. (1) In claim 1, guide rollers for supporting the head box movably only in the vertical direction along the vertical frame of the window are attached to both ends of the head box. When the head box is moved up and down, the head box can be prevented from shifting in the front-rear and left-right directions.

[0034]

As described above in detail, the present invention can provide a head box lifting / lowering type blind in which the slat lifting / lowering operation and the angle adjusting operation can be performed by a common motor.

[Brief description of the drawings]

FIG. 1 is a front view of a head box lifting type blind.

FIG. 2 is a side view of a head box lifting type blind.

FIG. 3 is a sectional view showing a head box suspension structure.

FIG. 4 is a front view of the clutch device.

FIG. 5 is a sectional view of a clutch device.

FIG. 6 is a sectional view taken along line AA in FIG.

[Explanation of symbols]

 Reference Signs List 3 motor 5a, 5b winding device 6 lifting tape 7 head box 17 angle adjusting shaft 18 ladder code 19 slat 12a, 12b transmission shaft 21 case (clutch device) 22 first clutch shaft (clutch device) 23 second clutch shaft (Clutch device) 26 Friction material (Clutch device)

Claims (2)

(57) [Claims] An up / down tape can be wound and rewound by a winding device based on rotation of a motor, and a head box of a horizontal blind is suspended and supported by the up / down tape to move the head box up and down by the operation of the motor. A plurality of slats are suspended from the head box via a ladder code, and the ladder code is set in the head box based on the rotation of an angle adjusting shaft rotatably supported in the head box. A head box lifting / lowering blind provided with a slat angle adjusting device for rotating the slat through a head box, wherein a pulley is rotatably supported on the head box, and
The pulley is suspended and supported by a lifting tape suspended endlessly.
Then, one end of the lifting tape is wound up by the motor.
Up and down the head box.
At times, the pulley is rotated, and a transmission shaft that rotates forward and reverse by the rotation of the pulley is provided in the same head box, and the transmission shaft is connected to the angle adjustment shaft, and between the transmission shaft and the angle adjustment shaft. A clutch device for transmitting rotation of the transmission shaft to an angle adjusting shaft until the slat is rotated in the vertical direction by forward and reverse rotation of the transmission shaft, wherein the head box lifting / lowering type is provided. blind. 2. The clutch device according to claim 1, wherein the first clutch shaft on the input side and the second clutch shaft on the output side are connected via a constant friction, and the slat is perpendicular to the second clutch shaft. 2. The head box lifting / lowering blind according to claim 1, further comprising a rotation preventing means for preventing rotation of the second clutch shaft when the blind is rotated in the direction.