JP2002038847A - Head box rise and fall type blind - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a head box rise and fall type blind which securely prevents the revolving movement of the head box during rise and fall operations of the head box. SOLUTION: Upper pulleys 17a, 17b are furnished at the upper part of the both ends of the head box 6, and at the lower part, lower pulleys 17c, 17d are furnished, and the pulleys are located so as to come into contact with both sides of a guiding wire 13.

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 in which a slat can be raised and lowered by raising and lowering a head box.

[0002]

2. Description of the Related Art In a head box lifting type blind disclosed in Japanese Utility Model Laid-Open No. 1-154297, the head box is raised and lowered by operating a lifting cord. Then, the slats are moved up and down based on the elevation of the head box, and the angles of the slats are adjusted in phase.

A guide wire that is tensioned vertically is inserted into the head box and each slat, and the head box and each slat are moved up and down along the guide wire.

[0004]

In the head box lifting type blind as described above, a guide wire is inserted into an insertion hole provided in the head box, and the head box is moved smoothly along the guide wire. The diameter of the insertion hole is formed larger than the diameter of the guide wire.

In such a configuration, when the head box is moved up and down, a moving shaft in the head box is rotated, and a rotational force acts on the head box with the rotation of the moving shaft.

[0006] Therefore, despite the guide wire being inserted through the head box, the head box slightly rotates when the head box is moved up and down, which is not preferable from the viewpoint of aesthetics. Further, there is a problem that the frictional force between the guide wire and the insertion hole is increased, and the operation force required to operate the head box up and down is increased.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a head box lifting type blind which can surely prevent the rotation of the head box during the lifting operation of the head box.

[0008]

According to the first aspect of the present invention, the lifting head box is suspended and supported by a lifting cord suspended from the winding head box, and the lifting head box is raised and lowered based on the operation of the lifting cord. Thereby, a slat suspended and supported from the lifting head box is raised and lowered, and a head box lifting type blind in which a guide wire is inserted into both ends of the lifting head box,
An upper pulley was provided at an upper portion of both ends of the elevating head box, and a lower pulley was provided at a lower portion, and the pulley was disposed so as to contact both sides of the guide wire.

In the present invention, the upper pulley and the lower pulley are each two, and are disposed so as to abut on both sides of the guide wire. In claim 3, the upper pulley and the lower pulley are arranged to be vertically displaced from each other.

According to a fourth aspect of the present invention, the upper pulley and the lower pulley are arranged symmetrically with respect to a line. According to the fifth aspect, the slat angle adjusting shaft provided in the lifting head box can be driven to rotate based on the lifting and lowering of the lifting head box.

[0011]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing an embodiment of a head box lifting type blind embodying the present invention.

A motor 2 is provided at the longitudinal center of the take-up head box 1 fixed to a window frame or the like, and an output shaft 3 of the motor 2 is connected to the take-up head box 1 from both sides of the motor 2. Extending to both ends.

On both sides of the motor 2, a controller for controlling the operation of the motor 2 and limit switches for setting the upper and lower limits of the slats are provided. At both ends of the winding head box 1, winding pipes 4a and 4b are fitted to both ends of the output shaft 3 so as to rotate integrally with the output shaft 3.

One end of a lifting cord 5a, 5b is wound around the winding pipe 4a, 4b.
a and 5b are, as shown in FIG.
Are rotatably supported on the lifting pulleys 7 rotatably supported at both ends thereof, guided again into the winding head box 1, and fixed to the winding head box 1.

Therefore, the winding pipes 4a, 4b are rotated, and the lifting cords 5a, 5b are moved by the winding pipes 4a, 4b.
As shown in FIG. 1, the lifting head box 6 is pulled up, and when the lifting cords 5a, 5b are unwound from the winding pipes 4a, 4b, as shown in FIG. Descends.

An angle adjusting shaft 8 is fitted to the center of the lifting pulley 7 so as not to rotate relatively. When the lifting pulley 7 is rotated, the angle adjustment shaft 8 is rotated integrally with the lifting pulley 7.

The angle adjusting shaft 8 extends over substantially the entire length of the elevating head box 6 and is fitted to a ladder cord supporting device (not shown) provided at a plurality of positions in the elevating head box 6. .

A ladder cord 9 is suspended from the ladder cord support device. A plurality of slats 10 are supported by the ladder cord 9, and the lower end of the ladder cord 9 is connected to a bottom rail 11.

A lower frame 12 fixed to a window frame or the like is provided below the bottom rail 11, and the bottom rail 11 is mounted on the lower frame 12. A guide wire 13 is stretched between both ends of the winding head box 1 and both ends of the lower frame 12. The upper end of the guide wire 13 is fixed to the winding head box 1, and is inserted through a wire guide 14 and each slat 10 provided at an end of the elevating head box 6. Is wound around a winding device (not shown) provided in the apparatus.

The guide wire 13 is tensioned with a predetermined tension by the winding device, and the lifting head box 6 and each slat 10 are raised and lowered while being guided by the guide wire 13.

The structure of the wire guide 14 will be described with reference to FIGS. 4 and 6. The base 16 of the wire guide 14 is fixed to the end of the elevating head box 6, and two upper pulleys are provided above the base 16. 17a, 17b are rotatably supported, and two lower pulleys 17c, 17c,
17d is rotatably supported.

The upper pulleys 17a and 17b have one pulley 17b disposed diagonally below the other pulley 17a, and the guide wire 13 is inserted between the two pulleys 17a and 17b.

The distance between the pulleys 17a and 17b is such that the pulleys 17a and 17b abut on both sides of the guide wire 13 which is stretched in the vertical direction. The lower pulley 17c, 1
7d, one pulley 17d is disposed diagonally below the other pulley 17c, and is disposed symmetrically with respect to the upper pulleys 17a and 17b. The distance between the pulleys 17c and 17d is the same as that of the upper pulleys 17a and 17b.

In the head box lifting type blind constructed as described above, when the motor 2 is operated to wind the lifting cord 5 around the winding pipes 4a and 4b, the lifting head box 6 is guided by the guide wire 13. While being raised. Then, as the elevating head box 6 is raised, the slats 10 are sequentially pulled up from the upper slat via the ladder cord 9.

At this time, with the rotation of the lifting pulley 7, the angle adjusting shaft 8 is rotated, and each slat 10 is pulled up while being rotated in the vertical direction. Motor 2
Is operated to take up the lifting cord 5 and take up the pipes 4a, 4b.
When rewinding from above, the lifting head box 6 descends while being guided by the guide wire 13. The lower slats 10 are sequentially stacked on the bottom rail 11 as the lifting head box 6 is lowered.

When adjusting the angle of the slat 10, if the motor 2 is slightly operated, the lifting pulley 7
The rotation of the angle adjustment shaft 8 is accompanied by the rotation of the slats, and each slat 10 is rotated.

The head box elevating blind constructed as described above has the following operational effects. (1) The slat 10 is moved up and down by operating the motor 2 to wind up or down the elevating cord 5 around the winding pipes 4a and 4b or to move the elevating head box 6 up and down along the guide wire 13. It can be performed.

(2) The motor 2 is operated to wind or unwind the elevating cord 5 around the winding pipes 4a and 4b, and the angle adjusting shaft 8 is rotated to perform the angle adjusting operation of the slat 10. be able to.

(3) Since the upper pulleys 17a and 17b and the lower pulleys 17c and 17d provided on the wire guide 14 support the guide wire 13 between the upper and lower parts of the elevating head box 6, At the time of the elevating operation of the elevating head box 6, even if the rotational force accompanying the rotation of the elevating pulley 7 acts on the elevating head box 6, the rotation of the elevating head box 6 can be reliably prevented.

(4) As the lifting head box 6 is raised and lowered, each of the pulleys 17a to 17a coming into contact with the guide wire 13
Since the 7d rotates, the friction between the guide wire 13 and the elevating head box 6 is reduced, and the elevating operation of the slat 10 can be performed smoothly and with a small operating force.

(5) Since the upper pulleys 17a and 17b and the lower pulleys 17c and 17d are vertically displaced from each other, the distance between the upper pulleys 17a and 17b and the lower pulleys 17c and 17c is reduced.
The guide wire 13 can be easily inserted between 17d.

The above embodiment can be modified as follows. -The upper pulleys 17a and 17b and the lower pulleys 17c and 17d may be arranged at the same height without being shifted in the vertical direction. -One upper pulley and one lower pulley may be provided, and the pulleys may be disposed on one side and the other side of the guide wire.

[0033]

As described above in detail, the present invention can provide a head box lifting / lowering blind which can surely prevent the rotation of the head box during the lifting / lowering operation of the head box.

[Brief description of the drawings]

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

FIG. 2 is a plan view showing a head box lifting type blind.

FIG. 3 is a front view showing an operation of a head box lifting type blind.

FIG. 4 is a sectional view showing a lifting pulley and a wire guide.

FIG. 5 is a sectional view showing an elevating pulley.

FIG. 6 is a sectional view showing a wire guide.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Winding head box 5 Elevating cord 6 Elevating head box 10 Slat 13 Guide wire 17a, 17b Upper pulley 17c, 17d Lower pulley

Claims (5)

[Claims] The lifting head box is suspended and supported by a lifting cord suspended from a take-up head box, and the lifting head box is raised and lowered based on an operation of the lifting cord, whereby the lifting head box is suspended from the lifting head box. In a head box lifting type blind in which a slat to be supported is raised and lowered and guide wires are inserted into both ends of the lifting head box, upper pulleys are provided at upper portions of both ends of the lifting head box, and lower pulleys are provided at lower portions. Wherein the pulley is disposed so as to abut on both sides of the guide wire. 2. The head box lifting / lowering blind according to claim 1, wherein the upper pulley and the lower pulley are each two and are disposed so as to be in contact with both sides of the guide wire. 3. The pulley according to claim 2, wherein the upper pulley and the lower pulley are vertically displaced from each other.
Head box lifting type blinds as described. 4. The head box lifting / lowering blind according to claim 2, wherein the upper pulley and the lower pulley are arranged symmetrically with respect to a line. 5. The slat angle adjusting shaft provided in the lifting head box can be driven to rotate based on the lifting and lowering of the lifting head box. Elevating blinds in the head box.