JPH0730875Y2 - Blind slat drive - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a slat driving device for vertically moving and adjusting the angle of slats of horizontal blinds arranged in parallel along the window surface of a bay window.

[Conventional technology]

Inside the bay window, a plurality of horizontal blinds are installed along the curved window surface. When the slats of each blind are lifted and the angle is adjusted, it is complicated to operate each blind separately.Therefore, there are various slat drive devices that can perform the lifting operation or the angle adjusting operation collectively. Proposed.

For example, in the first horizontal blind for a bay window described in Japanese Utility Model Publication No. 63-28310, the slat angle adjusting shaft of each blind is connected by a connecting member having a spherical gear to perform the angle adjusting operation of each blind at the same time. Is possible. In addition, in the second window blinds described in Japanese Utility Model Publication No. 63-49515, the angle adjusting shafts of each blind are also connected, and the lifting code of each blind is guided to the head box of one blind. Since the slats can be lifted and lowered by pulling out and pulling in the lifting cords of the blinds at the points, the slats of the blinds can be collectively lifted and angle-adjusted.

[Problems to be solved by the device]

However, in the first bay window blind as described above, the angle adjustment of the slats can be performed at one time, but since the lifting device for the slats must be provided and operated in each blind, the operation is complicated. It is not aesthetically preferable that the operation cord for lifting and lowering the slat is hung from the head box of each blind.

Also, in the second window blind, the slats of each blind can be raised and lowered and the angle can be adjusted in a lump by a single operating device, but the raising and lowering cord of each blind uses a guide in the hinge fitting that connects the head box. Since it is routed through it, there is a problem that the operating force is increased due to the friction between the guide and the lifting cord, and the durability is low.

It is an object of the present invention to provide a slat drive device which is capable of raising and lowering and adjusting the angle of slats of a plurality of horizontal blinds arranged side by side at the same time and which is excellent in operability and durability.

[Means for Solving the Problems]

In order to achieve the above-mentioned object, the present invention has a plurality of blinds arranged side by side to rotate the drive shaft provided in the head box to adjust the slats up and down and adjust the angle.
By connecting the drive shaft of each blind, it is possible to rotate integrally,
An operating device for rotationally driving the drive shaft of one of the blinds is connected to the drive shaft via a braking device that blocks the rotation of the drive shaft due to the weight of the slats, and the operation cord is hung from the operating device. It has a structure.

[Action]

By the above means, the slats of a plurality of blinds can be collectively moved up and down and the angles thereof can be adjusted by operating the operation code, and it is not necessary to draw the lifting code of each blind into the head box of an adjacent blind.

〔Example〕

An embodiment of a window window blind embodying the present invention will be described below with reference to the drawings.

In the three horizontal blinds 1a, 1b, 1c shown in FIG. 1, their head boxes 2 have universal joints 3 respectively.
The head box 2 is fixed to the bay window (not shown) in a bent state along the window surface. Headbox 2 for each blind 1a, 1b, 1c
The slat 4 in multiple stages is suspended and supported via the ladder cord 5 and the lifting cord 6. The universal joint 3 is a well-known articulated type that can obtain a large rotation angle in a small rotation space and can transmit a large rotation torque.

As shown in FIG. 2, drive shafts 7a, 7b, 7c are rotatably supported in the head boxes 2, respectively, and the lifting cord 6 is attached to the drive shafts 7a, 7b, 7c. The ladder cord 5 is suspended and supported by the winding drum 8, and the ladder cord 5 is suspended and supported by a known supporting device 9 attached to the drive shafts 7a, 7b, 7c in the vicinity of the winding drum 8. And the drive shaft
By rotating 7a, 7b, 7c, the slat 4 is moved up and down and its angle is adjusted, and after each slat 4 is rotated to the vertical direction, the drive shafts 7a, 7b, 7c idle around each support device 9. Then, each slat 4 is moved up and down while being held in the vertical direction.

The drive shafts 7a, 7b, 7c are connected to each other in the hinge member 3 by a connecting member similar to that of the conventional example, and are integrally rotatable. The drive shaft 7b of the central blind 1b is divided into two parts at the middle part thereof, and the braking devices 10a, 10b are attached to the divided end parts thereof, and the operating device 11 is arranged between the braking devices 10a, 10; An operation cord 12 is hung from the operation device 11 as shown in FIG. Then, by operating the operation code 12, the drive shaft 7 via the brake devices 10a, 10b.
b can be rotationally driven, and rotation of the drive shaft 7b due to the weight of the slat 4 is blocked by the brake devices 10a and 10b.

Next, the structure of the operating device 11 and the brake devices 10a and 10b will be described with reference to FIGS. 3 and 4. In the operating device 11, a pulley 15 is fitted to an input shaft 14 rotatably supported by a case 13. The operation code 12 is hung on the pulley 15. One end of the input shaft 14 operates as an input shaft of a planetary gear (not shown) provided in the case 13, and the output shaft 16 of the planetary gear is formed in a hexagonal rod shape and penetrates the input shaft 14 to penetrate the case 13 on both sides. Is projected to. Then, when the operation cord 12 is operated to rotate the pulley 15, the input shaft 14 is rotated, and the output shaft 16 is decelerated with respect to the input shaft 14 by the action of the planetary gears and is rotated in the reverse rotation.

The brake devices 10a and 10b provided on both sides of the operation device 11 have the same structure and are attached symmetrically. That is,
The case 17 of the braking device 10a, 10b is the operating device 11 described above.
The case 13 is attached with a screw 18, and a torsion coil spring 19 is arranged in the case 17. The torsion coil spring 19 is constantly pressed against the inner peripheral surface of the case 17 by the urging force to expand its diameter, and as shown in FIG. 4, its ends 20a, 20b are bent toward the center at positions close to each other. Has been done.

Both ends of the output shaft 16 of the operating device 11 are brake devices 10a,
The drive drum 21 projects into the case 17 of 10b and is fitted to the end thereof. The drive drum 21 has a pair of drive protrusions 22 protruding toward the inside of the torsion coil spring 19.
a and 22b are provided, and as shown in FIG.
The a and 22b are located outside the ends 20a and 20b of the torsion coil spring 19.

A driven shaft 23 is rotatably supported by the case 17 of the braking device 10a, 10b, the split ends of the drive shaft 7b are fitted to the tip end of the driven shaft 23, and the base end is shown in FIG. As shown, a driven protrusion 24 protruding between the ends 20a and 20b of the torsion coil spring 19 is provided. Then, as the output shaft 16 is rotated and the drive drum 21 is rotated, the drive projection is
One of the ends 22a and 22b is twisted and the end 2 of the coil spring 19 is
When it abuts against either 0a or 20b, the rotational force weakens the crimping force of the torsion coil spring 19 against the inner peripheral surface of the case 17, so that the torsion coil spring 19 moves.
Is rotated together with. At this time, the driven protrusion 24 is pushed by one of the drive protrusions 22a and 22b, and the driven shaft 23 is rotated in the same direction. Therefore, when the operation code 12 is operated, the drive shaft 7a is rotated.

On the other hand, if the driven projection 24 abuts on one end 20a of the torsion coil spring 19, for example, due to the weight of the slat 4 rotating the drive shaft 7a, the torsion coil spring 1
9 is further pressed against the case 17 in an attempt to expand its diameter, so that the frictional force prevents the drive shaft 7a from rotating,
Slat 4's own weight drop is prevented.

Now, in the horizontal blind configured as described above, the operating device 11 is provided in the head box 2 of the central blind 1b, and the braking devices 10a and 10b provided on both sides of the operating device 11 are provided on both sides of the operating device 11. The drive shaft 7b is rotationally driven, the drive shafts 7a and 7c are rotationally driven integrally with the drive shaft 7b, and the slats 4 are hung from the respective drive shafts 7a, 7b and 7c via the lifting cord 6 and the ladder cord 5. Is raised and lowered and the angle is adjusted. Further, the drive shaft 7b located on one side of the operating device 11
The rotation by the weight of the slat 4 of the same 7a is the braking device 10
drive shaft 7 located on the other side of the operating device 11 blocked by a
Rotation by the weight of the slat 4 of b and 7c is the braking device 1
Since it is blocked by 0b, the descent of the slat 4 of each blind 1a, 1b, 1c is surely blocked.

Therefore, since the blinds 1a, 1b, 1c can be collectively moved up and down and the angles thereof can be adjusted by operating the operation cord 12, the operation is extremely simple. Further, unlike the conventional example, it is not necessary to pull the lifting cord between the head boxes of the adjacent blinds, and the drive shaft 7 of each blind is
Since it has a structure in which only a, 7b, and 7c are connected, it has excellent durability.

[Effect of device]

As described in detail above, the present invention can provide a slat drive device that is superior in operability and durability, as well as enabling vertical elevation and angle adjustment of a plurality of horizontal blind slats that are installed in parallel. Shows excellent effects.

[Brief description of drawings]

FIG. 1 is a perspective view showing a horizontal blind for a bay window of the present invention, FIG. 2 is a schematic view showing a slat driving device thereof, and FIG.
FIG. 4 is a front view of the operating device and the braking device, and FIG. 4 is a sectional view of the braking device. Blinds 1a, 1b, 1c, head box 2, slats 4,
Drive shafts 7a, 7b, 7c, brake devices 10a, 10b, operating device 11,
Operation code 12.

Claims (1)

[Scope of utility model registration request] 1. Blinds (1a, 1b, 1c) for raising and lowering and adjusting an angle of a slat (4) by rotating a drive shaft (7a, 7b, 7c) provided in a head box (2).
Multiple blinds are installed side by side, and the drive shafts (7a, 7b, 7c) of each blind are connected so that they can rotate integrally. The drive shaft (7b) of one of the blinds is driven by the weight of the slat (4). An operating device (1) for rotationally driving the drive shaft (7b) via a brake device (10a, 10b) that blocks rotation of the shaft (7b).
1) and connect the operation code (1
2) A slat drive device for blinds, characterized in that