JPH11270253A - Adjusting device of slat angle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an adjusting device of slat angle which can increase the vertical displacement of a ladder cord without increase of the height of the head box. SOLUTION: This adjusting device is provided with an actuation shaft 20 rotatably supported in a head box 12, a drum structure 22 connected to the actuation shaft 20, and a ladder cord 14 connected to the drum structure 22. The drum structure 22 is provided wish an intermediate drum 26 connected to the actuation shaft 20 so as not to relatively rotate, winding drums 28 arranged in parallel to the intermediate drum 26 before and after the intermediate drum 26 respectively in the head box 12, and gears integrally connected to the intermediate drum 26 and the winding drums 28 respectively. The rotary movement of the intermediate drum 26 is transmitted to the winding drum 28 through the gears. Respective upper ends of the vertical front side part 14a and the rear side part 14b of the ladder cord 14 are fixed to the before and after winding drums 28 respectively to be wound on the winding drum 28 or unwound therefrom.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a slat angle adjusting device used for a horizontal blind and for adjusting the opening and closing angle of the slat.

[0002]

2. Description of the Related Art Conventionally, a slat angle adjusting device of this type includes an operating shaft disposed in a head box, a drum fixed to the operating shaft, and a ladder cord having an upper end connected to the drum. There is a ladder cord horizontal cord supporting each slat. By rotating the working shaft, the drum fixed to the working shaft rotates, and the front and rear of the ladder cord fixed to the drum are relatively vertically shifted to incline the horizontal cord, thereby reducing the angle of the slat. (For example, JP-A-7-34766).

[0003]

However, in such a conventional slat angle adjusting device, for example, when the width of the slat is large and the relative vertical displacement between the front and rear of the ladder cord has to be large, the drum is required. Therefore, there is a problem that the height of the head box becomes large and bulky.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and the invention according to claims 1 and 2 is capable of increasing the amount of vertical displacement of a ladder cord without increasing the height of a head box. It is an object of the present invention to provide an angle adjusting device.

[0005]

According to one aspect of the present invention, there is provided an operation shaft disposed in a head box, a drum mechanism connected to the operation shaft, and the drum mechanism. A ladder cord connected to the slat angle adjusting device for adjusting an opening / closing angle of a slat supported by the ladder cord by rotating an operating shaft, wherein the drum mechanism includes an operating shaft in a head box. And a transmission unit for transmitting the rotation of the operating shaft to each winding drum. The front and rear winding drums have upper and lower ends of the front side of the ladder cord. The upper ends are connected so as to be able to be wound and unwound, respectively, and when the rotation of the operating shaft is transmitted to the front and rear winding drums via the transmission portion, one of the winding drums becomes a ladder coat. Winding an upper end of the other winding drum, characterized in that solving winding an upper end of the ladder cord.

When the operating shaft is rotated to adjust the angle of the slat, the rotation is transmitted to the winding drums disposed before and after the operating shaft by the transmitting portion, and one of the winding drums is rotated. Winds the upper end of the ladder cord, and the other winding drum unwinds the upper end of the ladder cord. Thereby, the winding amount and the unwinding amount of each winding drum can be reduced, and the diameter of the winding drum can be reduced.

According to a second aspect of the present invention, there is provided an operation shaft provided in a head box, a drum mechanism connected to the operation shaft, and a ladder cord connected to the drum mechanism. A slat angle adjusting device that adjusts an opening and closing angle of a slat supported by a ladder cord by rotating the drum mechanism, wherein the drum mechanism includes a pulley connected to the operating shaft so as to be relatively non-rotatable, and a pulley in the head box. , And a belt wound around the front and rear auxiliary rollers and meshing with the pulley, and the upper end of the ladder cord is connected to the belt.

When the operating shaft is rotated to adjust the angle of the slat, the pulleys connected to the operating shaft so as to be relatively non-rotatable also rotate. This rotation is transmitted to the belt, and the upper end of the ladder cord connected to the belt moves together with the belt. Since the belt is extended in the front-rear direction by the auxiliary roller, the amount of movement can be increased, and the diameters of the pulley and the auxiliary roller can be reduced.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of a slat angle adjusting device according to the present invention will be described below with reference to the drawings.
FIG. 1 is a front view of a horizontal blind to which a slat angle adjusting device of the present invention is applied. In the figure, reference numeral 10 denotes a blind, which is a head box 12 fixed to a window frame or the like.
A large number of slats 16 are supported by a ladder cord 14. That is, a plurality of horizontal cords 14c (see FIG. 2) are connected to the ladder cord 14 between the vertical front side part 14a and the rear side part 14b, and each slat 16 is supported by each horizontal cord 14c. ing.
In this embodiment, the ladder cord 14 has a wide tape shape, but may have a narrow string shape.

The lower end of the ladder cord 14 is the bottom rail 1
7, the upper end of which passes through a drum opening 12a formed in the lower surface of the head box 12, and
2 and constitutes a slat angle adjusting device 18 described below. That is, as shown in FIG. 2, the slat angle adjusting device 18 of the present invention mainly includes the head box 1
An operating shaft 20 which is disposed in the longitudinal direction in the head box 2 and is rotatably fixed in the head box 12;
0, and the ladder cord 14 connected to the drum mechanism 22.

The drum mechanism 22 further includes a center hole 26a having a non-circular cross section to be fitted to the operating shaft 20 having a non-circular cross section.
An intermediate drum 26 which is connected to the operating shaft 20 so as to be relatively non-rotatable, and a winding drum 28 disposed in front of and behind the intermediate drum 26 in the headbox 12 in parallel with the intermediate drum 26, respectively. , 30 that are integrally connected to the intermediate drum 26 and each winding drum 28
(See FIG. 3).

The gears 29 and 30 are respectively connected to the intermediate drum 2
6, a spur gear provided on the axis of the winding drum 28, the front and rear gears 30, 30 are securely meshed with the gear 29, and the gears 29, 30 together with the intermediate drum 26 It constitutes a transmission unit for transmitting rotation. The upper ends of the vertical front side portion 14a and the rear side portion 14b of the ladder cord 14 are fixed to the front and rear winding drums 28, respectively, and can be wound on the winding drum 28 and unwound. In FIG. 2, the winding directions of the upper ends of the front side portion 14a and the rear side portion 14b of the ladder cord 14 with respect to the winding drum 28 are opposite to each other.

At one end of the operating shaft 20, a transmission mechanism (not shown) is provided.
(FIG. 1) is connected, and the operation code 24 is led out from one end side of the head box 12. Figures 2 and 3
, The intermediate drum 26 and the winding drum 28
Is fixed to a plastic drum base 31,
At the lower part of the drum base 31, the front side 1 of the ladder cord 14 is provided.
An elevating cord insertion piece 32 separate from the drum base 31 is disposed between the rear side part 4a and the rear side part 14b. The lifting / lowering cord insertion piece 32 has an opening and a roller 33 provided adjacent to the opening, and the lifting / lowering cord 34 passes through the opening, and
You are guided into. The lifting cord 34 is used to move the slat 16 up and down.
4a and the slat 1 positioned between the rear side 14b.
6.

The slat angle adjusting device 18 configured as described above operates the operating shaft 2 by operating the operating cord 24.
0, the intermediate drum 26 is
It rotates with it. Then, the gear 29 is driven by the intermediate drum 26 to rotate the gears 30 and 30 meshing with each other in the front and rear directions, so that the front and rear winding drums 28 and 28 integrated with the gears 30 and 30 rotate in each other. Since the winding directions of the upper ends of the front side portion 14a and the rear side portion 14b of the ladder cord 14 are opposite to each other, the upper end of the ladder cord 14 fixed to one winding drum 28 is wound up, and the other winding side is wound up. The upper end of the ladder cord 14 fixed to the take-up drum 28 is unwound. In this way, the front and rear sides 14a and 14b of the ladder code 14 are relatively vertically shifted from each other, and the horizontal cord 14c is inclined.
The angle of the slat 16 supported by 4c changes. When the operating shaft 20 is turned to the opposite side, the angle of the slat 16 changes in the opposite direction.

The ladder cord 14 is wound on one winding drum 28.
And the other winding drum 28 unwinds the ladder code 14, so that the winding amount and unwinding amount of each winding drum 28 is about half the conventional amount, but the relative displacement amount of the front and rear ladder cords 14 is small. Can be secured in the same manner as in the prior art. Therefore, the diameter of the winding drum 28 can be reduced,
The height of the head box 12 can also be reduced.

Next, FIG. 4 illustrates a second embodiment of the slat angle adjusting device according to the present invention. In the figure, the same members as those of the first embodiment are denoted by the same reference numerals, and the description thereof is omitted. The drum mechanism 38 according to the present embodiment includes a toothed pulley 40 having a center hole 40a having a non-circular cross section that fits into the operating shaft 20 having a non-circular cross section, and being connected to the operating shaft 20 so as to be relatively non-rotatable. , Head box 12
Auxiliary rollers 42, 42 disposed parallel to the pulley 40 before and after the pulley 40, respectively, and the toothed belt 4 wound around the
And 4.

The toothed belt 44 is meshed with the toothed pulley 40, and can rotate around the auxiliary roller 42 by the rotation from the toothed pulley 40. Further, the upper end of the front side portion 14a and the upper end of the rear side portion 14b of the ladder cord 14 go around the front side of the front side auxiliary roller 42 and the rear side of the rear side auxiliary roller 42 to form the toothed belt 44.
Are fixed at the same location as much as possible on the outer peripheral side.

In the figure, reference numeral 46 denotes the ladder code 14.
The front side 14a and the rear side 14b of the head box 12
It is a guide roller that guides smoothly to the auxiliary roller 42 inside. Slat angle adjusting device 1 configured as above
8, when the operation shaft 24 is rotated by operating the operation cord 24, the toothed pulley 40 rotates together with the operation shaft 20. Then, the toothed belt 44 is rotated by the toothed pulley 40, and the upper end of the ladder cord 14 connected to the toothed belt 44 moves back and forth. Thereby, the upper end of one ladder cord 14 is pulled up, and the upper end of the other ladder cord 14 is pulled down. Thus, the front side portion 14a and the rear side portion 14
b is relatively shifted vertically in the vertical direction.
4c is tilted, thereby changing the angle of the slat 16 supported by the horizontal cord 14c. When the operating shaft 20 is turned to the opposite side, the angle of the slat 16 changes in the opposite direction.

Also in this embodiment, the diameter of the drum is substantially increased by using the front and rear spaces in the head box 12 by the belt wound around the auxiliary roller instead of the conventional drum. Therefore, the diameters of the pulley and the auxiliary roller can be reduced.

[0020]

As described above, according to the first and second aspects of the present invention, the amount of movement of the upper end of the ladder cord is ensured by effectively utilizing the space before and after the operating shaft of the head box. Can be. Accordingly, the diameter of the winding drum or the pulley does not need to be increased, the height of the head box can be reduced, and the aesthetic appearance can be improved. In particular, when the slat width is large, the front and rear width of the head box is large, so that the front and rear space can be effectively used.

Further, particularly when the ladder code is in the form of a wide tape, if the upper ends of the front side and the rear side of the ladder code are fixed to one drum as in the prior art, the ladder code may be overlaid on the drum. Can not be wound,
Although the amount of vertical displacement is limited, in the invention according to claim 1, since the upper ends of the front side and the rear side of the ladder cord can be wound multiple times around each winding drum, the upper and lower parts are accordingly Can be increased.

[Brief description of the drawings]

FIG. 1 is a front view of a horizontal blind to which a slat angle adjusting device of the present invention is applied.

FIG. 2 is a sectional view illustrating a slat angle adjusting device according to a first embodiment of the present invention.

FIG. 3 is an exploded perspective view of FIG. 2;

FIG. 4 is a sectional view illustrating a slat angle adjusting device according to a second embodiment of the present invention.

[Explanation of symbols]

 Reference Signs List 12 head box 14 ladder cord 14a front side 14b rear side 16 slat 18 slat angle adjusting device 20 operating shaft 22 drum mechanism 26 intermediate drum (transmission section) 28 winding drum 29, 30 gear (transmission section) 38 drum mechanism 40 pulley 42 auxiliary roller 44 belt

Claims (2)

[Claims] An operating shaft (20) disposed in a head box (12), a drum mechanism (22) connected to the operating shaft (20), and a ladder connected to the drum mechanism (22). And a ladder code (1) by rotating the operating shaft (20).
4) A slat angle adjusting device for adjusting an opening / closing angle of a slat (16) supported by the slat (16), wherein the drum mechanism (22) is disposed in front of and behind an operating shaft (20) in a head box (12). And a transmission unit (26, 29, 3) for transmitting rotation of the operating shaft (20) to each winding drum (28).
0), and the front and rear winding drums (28) are connected with the upper end of the front side and the upper end of the rear side of the ladder cord (14) so that they can be wound and unwound, respectively. When the rotation of 20) is transmitted to the front and rear winding drums (28) via the transmission portions (26, 29, 30), one of the winding drums (28) winds the upper end of the ladder cord (14). , The other winding drum (28) is the ladder code (14).
A slat angle adjusting device characterized by unwinding the upper end of a slat. 2. An operating shaft (20) disposed in a head box (12), a drum mechanism (38) connected to the operating shaft (20), and a ladder connected to the drum mechanism (38). And a ladder code (1) by rotating the operating shaft (20).
4) A slat angle adjusting device for adjusting an opening / closing angle of a slat (16) supported on the slat (16), wherein the drum mechanism (38) includes a pulley (40) connected to the operating shaft (20) so as to be relatively non-rotatable. An auxiliary roller (42) disposed before and after the pulley (40) in the head box (12), and a pulley (40) wound around the front and rear auxiliary rollers (42).
And a belt (44) that meshes with the slat angle adjustment device, wherein the upper end of the ladder cord (14) is connected to the belt (44).