JP2000179259A - Elevating device for blind - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an elevating device for a blind including an obstacle detecting and stopping device, in which elevating devices for left operation and right operation can be formed by common parts. SOLUTION: This blind elevating device is so constructed that an elevating cord 5 is supported and suspended from a take-up pulley 12 rotatably supported on a cord support 9, a slat driving device 7a is operated to drive the take-up pulley 12 in rotation, thereby spirally winding the elevating cord 5 on the take-up pulley 12, or rewinding the same to elevate a shielding material 3, and the cord support 9 is provided with an obstacle detecting and stopping device 15. In the blind, the take-up pulley 12 and the cord support 9 can be replaced with each other in the lateral direction to a head box 1, and the obstacle detecting and stopping device 15 can be replaced in the lateral direction to the cord support 9 so that even if the take-up pulley 12 and the cord support 9 are replaced in the lateral direction, the device 15 can be operated under the same conditions to the elevating cord 5.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lifting device such as a horizontal blind, a pleated curtain, or a raised curtain.

[0002]

2. Description of the Related Art Conventionally, as one type of a horizontal blind,
There are the following. A slat operating device is provided on one side of the head box, and an operating cord is suspended from the slat operating device below the head box.

[0003] A slat elevating shaft is rotatably supported in the head box, and a winding pipe for an elevating cord is attached to the slat elevating shaft. When the operation cord is operated in the slat lifting direction, the slat lifting shaft is rotated in the lifting cord winding direction, the lifting cord is spirally wound around the winding pipe, and the bottom rail and the slat are pulled up.

When the operating cord is operated in the slat descending direction, the slat elevating shaft is rotated in the elevating cord rewinding direction, and the bottom rail and the slat descend. The lowering operation of the slat is performed by rotating the slat lifting / lowering shaft by the slat operating device by operating the operation cord and rewinding the lifting / lowering cord from the winding pipe, or by operating the operation code to reduce the weight of the slat. There is a configuration in which the slat and the bottom rail are lowered by their own weight by releasing the operation of the descent prevention device to make the slat elevating shaft rotatable.

The slat angle adjusting operation is performed in parallel with the slat elevating operation by operating an operation code. That is, after the slat angle adjustment axis is rotated based on the operation of the operation code, the slat is rotated via the ladder code, and after each slat is rotated substantially vertically,
Further rotation in the same direction is prevented. The slat angle adjusting axis may be common to the slat elevating axis or may be separate.

[0006] The elevating cord is inserted into an obstacle detection and stop device at an introduction portion to the head box. When the bottom rail abuts an obstacle during the descent operation of the slat and cannot be lowered, the obstacle detection and stop device detects the slack of the lifting / lowering cord and further rotates the slat drive shaft in the same direction. Block. Therefore, a problem caused by unnecessary rewinding of the lifting cord is prevented.

[0007] Such an elevating device is also applied to an elevating device for elevating a lift-up curtain or a pleated curtain.

[0008]

In the lifting device as described above, since the lifting cord is wound spirally around the winding pipe, the winding pipe must have a sufficient length. A slat operating device is provided at one end of the head box. Therefore, on one end side of the head box, the winding pipe disposed near the slat operating device extends from the lifting cord winding position toward the center of the head box in order to avoid interference with the slat operating device. .

However, in such a lifting device, for example, in order to use a device designed for right operation for left operation, the winding pipe is disposed on the left end of the head box. The provided slat operating device and the winding pipe interfere with each other, and the lifting cord cannot be hung at a predetermined position.

In order to prevent interference between the winding pipe and the slat operating device, if the same winding pipe is disposed in the left and right direction, the winding direction of the lifting / lowering cord with respect to the winding pipe and the obstacle detection. The operation direction with the stop device does not match.

Therefore, a common component cannot be used for the left operation and the right operation, and there is a problem that an increase in the number of components causes an increase in cost. SUMMARY OF THE INVENTION It is an object of the present invention to provide a blind lifting device having an obstacle detection and stopping device, wherein the left and right operation lifting devices can be configured with common components.

[0012]

According to the first aspect of the present invention, a lifting cord is suspended from a winding pulley rotatably supported by a cord support in a head box, and a shielding member is suspended and supported by the lifting cord. By operating a slat driving device disposed at an end in the head box to rotate the winding pulley, the lifting cord is spirally wound around the winding pulley or unwound, and the shielding is performed. A blind member provided with an obstruction detection stop device for detecting a slack of the lifting cord on the cord support and preventing rotation of the winding pulley in a rewinding direction of the lifting cord; And the cord support can be replaced in the left-right direction with respect to the head box. Even when interchanged support in the lateral direction, and the interchangeable in the lateral direction with respect to the code support to work under the same conditions with respect to the lift cord.

According to a second aspect of the present invention, the winding pulley is capable of winding the lifting cord in a direction away from the slat driving device based on the rotation of the pulley, and the obstacle detection and stop device is moved forward and backward with respect to the cord support. Slide stopper which is supported so as to be movable in the direction and can be exchanged in the left-right direction and through which the lifting cord is inserted, a ratchet gear fitted to the winding pulley, and the slide stopper when the lifting cord is loosened. And a biasing means for moving to a position meshing with the ratchet gear, and a pair of guide holes for inserting the lifting code are provided in the slide stopper symmetrically in the left-right direction,
When the slide stopper is replaced in the left-right direction, a lifting cord can be inserted into any of the guide holes.

According to a third aspect of the present invention, the cord support is provided with a guide roller for guiding the elevating cord from outside the head box to the take-up pulley, and the guide roller is provided when the cord support is replaced in the left-right direction. The mounting position can be switched in the front-rear direction so as to correspond to the guide direction of the lifting cord.

According to a fourth aspect, the slat driving device includes:
A slat lifting operation for rotating the take-up pulley in a lifting cord winding direction via a slat lifting shaft based on the operation of the operating means, and the slat lifting shaft can be freely rotated based on the weight of the slat and the bottom rail. Slat lowering operation and a self-weight lowering prevention operation for preventing rotation of the slat elevating shaft based on the weight of the slat and the bottom rail when the operating means is not operated.

[0016]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. In the horizontal blind for right-hand operation shown in FIG. 1, a multistage slat 3 is suspended and supported as a shielding material from a head box 1 through a plurality of ladder cords 2, and a bottom rail 4 is provided at a lower end of the ladder cord 2. It is connected.

The slat 3 is penetrated by a plurality of elevating cords 5 suspended from the head box 1, and the bottom rail 4 is connected to a lower end of the elevating cord 5. The upper end of the lifting cord 5 is wound around a lifting cord winding device in the head box 1.

From the right end of the head box 1, an endless operation code 6 hangs down. The operation code 6 is connected to a pulley 8 of a slat drive device 7a disposed in the head box 1 as shown in FIG. Mounted on.

In the head box 1, a cord support 9 is provided at a position where the elevating cord 5 and the ladder cord 2 are suspended. Therefore, as shown in FIG.
Is disposed near the slat drive device 7a.

At the upper right end of the cord support 9,
A code drum 10 is rotatably supported, and the upper end of the ladder cord 2 is attached to the code drum 10. A hexagonal rod-shaped angle adjusting shaft 11 is inserted into the center of the cord drum 10 so as to be relatively non-rotatable.

One end of the angle adjusting shaft 11 is fitted to the output shaft of the slat driving device 7a. When the operation cord 6 is operated, the angle adjusting shaft 11 is rotationally driven by the slat driving device 7a, and the code drum 10 is rotated with the rotation of the angle adjusting shaft 11. And
When the cord drum 10 is rotated, one of the ladder cords 2 is pulled up and the other is lowered, and the angles of the slats 3 are adjusted in phase.

A winding pulley 12 for winding the lifting cord 5 is rotatably supported on the cord support 9 below the angle adjusting shaft 11, and a square portion of the winding pulley 12 has a square shape. A rod-shaped slat elevating shaft 13 is inserted so as not to rotate relatively.

One end of the slat elevating shaft 13 is fitted to the output shaft of the slat driving device 7a and is driven to rotate by the slat driving device 7a. The winding pulley 1
2, a pipe-shaped winding portion 14 whose diameter decreases in a tapered cross section from near the right end to the left end is formed. The elevating cord 5 is guided into the head box 1 from below the right end position of the winding unit 14, and the upper end thereof is attached to the left end of the winding unit 14.

Accordingly, when the slat elevating shaft 13 is rotated by the slat driving device 7a and the winding pulley 12 is rotated, the elevating cord 5 is spirally wound or unwound by the winding part 14.

At the right end position of the winding pulley 12,
An obstacle detection stop device 15 is provided. That is,
A hexagonal shaft-shaped fitting portion 16 is formed at the right end of the winding pulley 12, and a ratchet gear 17 is fitted to the fitting portion 16 as shown in FIG. Therefore, when the winding pulley 12 is rotated, the ratchet gear 17 is rotated integrally with the winding pulley 12.

As shown in FIG. 2, the ratchet gear 1
Below the cord support 9, a slide stopper 18 is supported on the cord support 9 so as to be movable in a direction perpendicular to the axis of the take-up pulley 12, that is, only in the front-back direction of the head box 1.

As shown in FIG. 3, a coil spring 19 is provided between the slide stopper 18 and the rear inner surface of the cord support 9. Therefore, the slide stopper 18 is urged toward the front of the head box 1 by the urging force of the coil spring 19 with the cord support 9 as a fulcrum.

As shown in FIG. 4, an engagement portion 20 is formed at the rear of the slide stopper 18 so as to protrude upward in a mountain shape. As shown in the figure, when the slide stopper 18 comes into contact with the rear inner surface of the cord support 9 against the urging force of the coil spring 19, the engaging portion 20 is engaged with the ratchet gear 17. Do not match. As shown in FIG. 5, when the slide stopper 18 is moved forward by the urging force of the coil spring 19, the engaging portion 20 is engaged with the ratchet gear 17, and the ratchet gear 17 is moved in the elevating cord rewind direction. It is designed to prevent rotation.

As shown in FIGS. 2 and 3, the slide stopper 18 is formed with guide pieces 21a and 21b extending symmetrically in the left-right direction at an intermediate portion in the front-rear direction.
Guide holes 22 are formed at the distal ends of the guide pieces 21a and 21b, respectively. The slide stopper 18 is formed so as to be symmetrical in the left-right direction, and can be replaced in the left-right direction with respect to the cord support 9 including the coil spring 19.

The cord support 9 has an opening 23 for guiding the elevating cord 5 from the inside of the head box 1 to the outside of the head box 1. On both sides of the opening 23, the cord support 9 is provided. Support holes 24a and 24b are formed at positions equidistant from the center line back and forth.

A guide roller 25 is rotatably supported by the support hole 24a located behind the center line of the cord support 9 among the support holes 24a and 24b, and the front outer peripheral surface of the guide roller 25 has a cord support. It is located on a vertical plane containing nine center lines.

The lifting cord 5 is guided from below the head box 1 to the guide piece 21 through the front outer peripheral surface of the guide roller 25.
The guide hole 22 is inserted into the guide hole 22, guided from the guide hole 22 to the rear of the winding pulley 12, and wound around the winding unit 14.

When the weight of the bottom rail 4 acts on the elevating cord 5, the elevating cord 5 is tensioned between the winding section 14 and the guide roller 25. Then, the position of the guide hole 22 of the slide stopper 18 is positioned by the elevating cord 5, and as shown in FIG. 4, the slide stopper 18 is moved backward against the urging force of the coil spring 19, and The part 20 is the ratchet gear 1
7 is held at a position where it does not engage.

When the bottom rail 4 comes into contact with any obstacle, or when the bottom rail 4 is lowered to the lowermost limit, the weight of the bottom rail 4 does not act on the lifting cord 5. The lifting cord 5 between 14 and the guide roller 25 is not tensioned.

Then, the slide stopper 18 is moved forward by the urging force of the coil spring 19 so that the engaging portion 16 meshes with the ratchet gear 17 as shown in FIG.

The slat driving device 7a drives the slat elevating shaft 13 to rotate in the slat lifting direction by pulling out one of the operation cords 6 downward.
Is pulled downward by a predetermined distance, whereby the slat elevating shaft 13 can be freely rotated based on the weight of the bottom rail 4 and the slat 3, and by further pulling the operation cord 6 by a predetermined distance, the bottom rail 4 and the slat 3 are pulled. The rotation of the slat elevating shaft 13 due to the weight of the slat is prevented.

Further, the angle of the slats 3 can be adjusted by rotating the angle adjusting shaft 11 by operating the operation cord 6, and the rotation of the slat elevating shaft 13 is prevented until each slat 3 is rotated substantially vertically. Then, after each slat 3 is rotated to a substantially vertical direction, the operation is performed so as to prevent the rotation of the angle adjusting shaft 11.

FIGS. 6 to 8 show a horizontal blind for left operation having the same function as the horizontal blind for right operation. The slat driving device 7b provided at the left end of the head box 1 operates the slat lifting shaft 13 and the angle adjusting shaft 11 in the same direction as the driving direction of the slat driving device 7a by the same operation of the operation cord 6. The internal configuration has been modified so that it can be performed.

In the vicinity of the slat driving device 7b, the same cord support 9 as in the case of right-hand operation and the take-up pulley 12 and the cord drum 10 supported by the same cord support 9 are provided. It is arranged with the left and right swapped.

As shown in FIG. 8, the ratchet gear 17 is fitted in the fitting portion 16 with the right and left directions being switched so as to be in the same rotational direction as the right operation. Further, as shown in FIG. 7, the slide stopper 18 and the coil spring 19 operate in the same direction as that for the right operation.
The cord support 9 is disposed in a state where the cord support 9 is replaced in the left-right direction. Further, the guide roller 25 is supported by the support hole 24b.

The lifting cord 5 is connected to the head box 1
Is inserted through the guide hole 22 of the guide piece 21 b through the front outer peripheral surface of the guide roller 25 from below, and is wound around the winding section 14 from behind the winding pulley 12.

With such a configuration, the rotation direction of the angle adjusting shaft 11 and the slat elevating shaft 13 during the slat angle adjusting operation and the slat elevating operation by operating the operation cord 6 and the winding of the elevating cord 5 around the winding pulley 12. The taking direction is the same as that for the right operation.

The operation of the horizontal blinds for the right operation and the left operation as described above will be described. When the operation cord 6 is pulled out in the slat pulling direction, first, the angle adjusting shaft 11 is rotated, and each slat 3 is rotated substantially vertically. Then, the slat elevating shaft 13 is rotated in the slat lifting direction, and the elevating cord 5 is wound by the winding portion 14 of the winding pulley 12.
And the bottom rail 4 and the slat 3 are pulled up.

At this time, the elevating cord 5 wound on the winding unit 14 is wound spirally on the winding unit 14, while being moved to the left end side of the winding unit 14 for the right operation and to the left end for the left operation. It moves sequentially toward the right end side of the winding unit 14.

When the operation cord 6 is released with the slat 3 pulled up to a desired position, the slat driving devices 7a, 7b
The self-weight descent prevention device built in the slat operates to prevent the slat elevating shaft 13 from rotating in the slat descent direction, and each slat 3 is suspended and supported at a desired position.

Next, when the operation cord 6 is pulled in the slat descending direction and the angle adjusting shaft 11 is rotated, each slat 3
Can be adjusted. On the other hand, when the operation cord 6 is pulled in the slat descent direction and the slat 3 is rotated to the vertical direction, the slat elevating shaft 13 is freely rotatable by the slat drive devices 7a and 7b, and the bottom rail 4
And the slat 3 descends by its own weight. Then, when the slat 3 is lowered to the desired position and the operation cord 6 is released, the self-weight lowering prevention device is activated, the self-weight lowering of the slat 3 is prevented, and the slat 3 is suspended and supported at the desired position.

When the slat 3 is lowered and the bottom rail 4 comes into contact with some obstacle and cannot be lowered, the lifting cord 5 is slackened and the slide stopper 18 is moved by the urging force of the coil spring 19, and the slide stopper 18 is moved. The engagement portion 20 of 18 is engaged with the ratchet gear 17.

Then, the rotation of the winding pulley 12 is stopped, and the lowering operation of the slat 3 is forcibly stopped.
Also, when the bottom rail 4 descends to the lower limit,
The engaging portion 20 is engaged with the ratchet gear 17 and rotation of the take-up pulley 12 is prevented.

With the horizontal blind as described above, the following operational effects can be obtained. (1) By operating the operation cord 6, the angle of the slat 3 can be adjusted by rotating the angle adjusting shaft 11. (2) By operating the operation cord 6, the lifting cord 5 can be wound on the winding pulley 12 and the slat 3 can be pulled up, and the lifting cord 5 can be lifted from the winding pulley 12 by the weight of the slat 3 and the bottom rail 4. The slat 3 can be lowered by rewinding. (3) The winding portion 14 of the winding pulley 12 disposed near the slat drive devices 7a and 7b extends from the winding position of the lifting cord 5 toward the center in the longitudinal direction of the head box 1, and The elevating cord 5 is spirally wound around the winding section 14. Therefore, the interference between the take-up pulley 12 and the slat driving devices 7a and 7b is prevented, and the slat 3 and the bottom rail 4 are supported at optimal positions by the ladder cord 2 and the lifting / lowering cord 5, and the take-up pulley 12 is supported.
A sufficient length for winding up the lifting cord 5 can be secured. (4) When the bottom rail 4 cannot be lowered due to an obstacle during the lowering operation of the slat 3, the rotation of the winding pulley 12 can be prevented by the slide stopper 18 and the lowering operation of the slat 3 can be prevented. . (5) For the right operation and the left operation, the same part can be used for the cord support 9 and the take-up pulley 12 by exchanging them in the left-right direction. In addition, the ratchet gear 17 and the slide stopper 18 can be used by replacing the same part on the left and right, and the guide roller 25 only needs to change its mounting position with respect to the cord support 9.

Therefore, the cord support 9, the take-up pulley 12, the ratchet gear 17, the slide stopper 18, the coil spring 19, and the guide roller 25 can use common parts for right operation and left operation.

The above embodiment can be modified as follows. The winding pulley may be configured to move in the axial direction while rotating with the rotation of the slat elevating shaft, so as to spirally wind the elevating cord. The angle adjusting shaft 11 and the slat elevating shaft 13 may be a common shaft. The slat elevating device as described above can also be applied to a hoisting curtain or a pleated curtain elevating device.

[0052]

As described above in detail, the present invention relates to a blind lifting and lowering device provided with an obstacle detecting and stopping device,
It is possible to provide a blind lifting device in which the left and right operation lifting devices can be configured with common components.

[Brief description of the drawings]

FIG. 1 is a front view showing a horizontal blind of one embodiment.

FIG. 2 is a sectional view showing a slat drive device and a slat elevating device for right operation.

FIG. 3 is a plan view showing a slat elevating device for right operation.

FIG. 4 is a side view showing a slat elevating device for right operation.

FIG. 5 is a side view showing the operation of the slat elevating device.

FIG. 6 is a sectional view showing a slat drive device and a slat elevating device for left operation.

FIG. 7 is a plan view showing a slat elevating device for left operation.

FIG. 8 is a side view showing a slat elevating device for left operation.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Head box 3 Shielding material (slat) 5 Elevating cord 7a, 7b Slat driving device 9 Cord support 12 Winding pulley 15 Obstacle detection stop device

Claims (4)

[Claims] An elevating cord is suspended from a take-up pulley rotatably supported by a cord support in a head box, and a shielding member is suspended and supported by the elevating cord. By operating the slat driving device provided to rotate the winding pulley, the lifting cord is spirally wound on the winding pulley, or unwound, so that the shielding member can be raised and lowered, and the cord support is provided. A blind provided with an obstacle detection stop device for detecting a slack of the lifting cord and preventing rotation of the winding pulley in the rewinding direction of the winding pulley, wherein the winding pulley and the cord support are moved right and left with respect to a head box. The obstacle detection and stop device replaces the take-up pulley and the cord support in the horizontal direction. Even if, blind lifting device, characterized in that to said code support to work under the same conditions with respect to the lift cord was interchangeable in the lateral direction. 2. The winding pulley is capable of winding the lifting cord in a direction away from the slat driving device based on rotation of the winding pulley, and the obstacle detection and stop device includes:
The cord support is supported so as to be movable in the front-rear direction with respect to the cord support, and is replaceable in the left-right direction, and a slide stopper through which the lifting cord is inserted, a ratchet gear fitted to the winding pulley, and the lifting cord Biasing means for moving the slide stopper to a position at which the slide stopper meshes with the ratchet gear when loosened, and a pair of guide holes for inserting the lifting cord are provided in the slide stopper symmetrically in the left-right direction. 2. The blind lifting device according to claim 1, wherein when the slide stopper is replaced in the left-right direction, a lifting code can be inserted into one of the guide holes. 3. The cord support is provided with a guide roller for guiding the elevating cord from outside the head box to the take-up pulley, and the guide roller is attached to a position where the cord support is replaced in the left-right direction. 3. The blind lifting device according to claim 2, wherein the vertical direction can be changed in the front-rear direction so as to correspond to the guiding direction of the lifting code. 4. The slat drive device comprises: a slat lifting operation for rotating the winding pulley in a lifting cord winding direction via a slat lifting shaft based on an operation of an operating means; A slat descent operation that can freely rotate based on the weight of the bottom rail and a self-weight descent prevention operation that prevents rotation of the slat elevating shaft based on the weight of the slat and the bottom rail when the operating means is not operated. The blind lifting device according to any one of claims 1 to 3, characterized in that: