JPH01174790A - Slat driver for head box lifting type blind - Google Patents

Abstract

PURPOSE:To make each angle of slats easily adjustable by having a slat drive shaft supported in a head box attached to one side of a driving rope stretched endlessly, and engaging the one end with the other side of the driving rope. CONSTITUTION:A driving rope 15 is stretched endlessly in a vertical box, and it is made operable for movement from the outside of a sash. Next, a head box 4 is attached to one side of the driving rope 15, and one end of slat drive shafts 17, 19 rotatably supported in the box is engaged with the other side of the driving rope 15. When the head box 4 is moved up and down, these slat drive shafts 17, 19 are driven for rotation by the driving rope 15 being moved in the reverse direction to its direction. With this movement, angular adjustments for slats 6 can be done only with the slight movement of the head box 4.

Description

DETAILED DESCRIPTION OF THE INVENTION Object of the Invention (Field of Industrial Application) This invention relates to a slat drive device that raises and lowers a slat and adjusts its angle by raising and lowering a head box.

(Prior Art) Conventionally, as a type of blind built into a double-glazed tatami frame, for example, a blind whose slats are raised and lowered by raising and lowering a head box has been put into practical use. In such blinds, a slat lifting device and a slat angle adjusting device are provided in the vertical frame of the sash, and by operating these devices, the slat can be raised and lowered to a desired position and the angle can be adjusted. However, in order to house the separate slat lifting device and angle adjustment device in the vertical stile, the vertical stile inevitably becomes larger, which is contrary to the trend toward thinner sashes in recent years.

Therefore, the slat lifting device is equipped with a slat angle adjustment function to rotate the slats when the head box starts lifting.
It has also been proposed that after the slats are rotated in the vertical direction, the angle adjustment mechanism is turned idly and only the head box is moved up and down, thereby simplifying the structure.

(Problem to be Solved by the Invention) However, in the slat lifting device as described above, when the angle of the slats is adjusted after lifting the head box to a desired position, the head box is also lifted or lowered, so that the head box cannot be lifted to the desired hanging position. There is the problem that it is difficult to hold the head box in place, and when the head box is pulled up to its highest position and the angle of the slats is adjusted, the head box lowers, causing the upper frame of the satsushi to become larger in order to hide the head box. There was a point.

Structure of the Invention (Means for Solving the Problems) In order to solve the above-mentioned problems, the present invention aims to raise and lower the slats by raising and lowering the head box provided in the vertical frame of the sash [2]. In a head box elevating type blind that adjusts the angle of the slats based on the elevation and descent of the head box, an endless driving cable 15 is stretched inside the vertical stile 2a and the operating means 7 is used to control the driving cable 15.
The head box 4 is attached to one side of the drive cable 15, and one end of the slat drive shaft 17° 19 rotatably supported in the head box 4 is connected to the other end of the drive cable 15. The slat drive shafts 17 and 19 can be driven to rotate as the head box 4 moves.

(Function) With the above means, when the head box 4 is raised or lowered, the slat drive shafts 17, 19 are rotationally driven by the drive cable 15 that moves in the opposite direction to the head box moving direction.

(Embodiment) Hereinafter, an embodiment embodying the present invention will be described with reference to the drawings. The double glass sash 1 shown in FIG. A large number of slats 6 are suspended from the head box 4 via ladder cords 5. The head box 4 is usually raised and lowered by rotating the operating handle 7 as an operating means stored in the storage groove 7a on the front surface of one of the vertical stiles 2a, and when the head box 4 is lowered, the lower part of the sash 1 The slats 6 are sequentially stacked and folded from the bottom slat 6.

As shown in FIG. 1, a left guide roller 8 and a right guide roller 9 are rotatably supported at both ends of the head box 4. A guide cord 10.11 is attached to each guide roller 8.9. That is, the upper end of one guide cord 10 is fixed above the left guide roller 8 to the upper frame 12 fixed inside the upper stile 3a, and the lower end of the guide cord 10 passes from the left guide roller 8 to the right guide roller 9. is fixed to a lower frame 13 fixed within the lower stile 3b below the right guide roller 9 and is tensioned.

The other guide cord 11 has its upper end fixed to the upper frame 12 above the fabric guide roller 9, and its lower end passes from the right guide roller 9 to the left guide roller 8, and its lower end is fixed to the lower frame 1.
3 below the left guide roller 8 and is tensioned. The head box 4 therefore has a guide cord 10.1 tensioned at both ends via guide rollers 8.9.
1 and can be raised and lowered while always being held horizontally.

Sprockets 1 are installed at the upper and lower ends of one of the vertical frames 2a.
4a and 14b are rotatably supported, and an endless chain 15 as a driving cable is hung between the sprockets 148 and 14b. The operating handle 7 can be bent into a crank shape, and its upper end is connected to the gear box 16.
The upper sprocket 14a is attached to the output shaft of the gear box 16. Therefore, when the operating handle 7 is rotated, the upper sprocket 14a is rotated via the gear box 16, and the chain 15 is moved between the sprockets 14a and 14b.

One end of the head box 4 is a sprocket 14a.

It is attached to the front side of the chain 15 stretched in parallel between the sections 14b, and is raised and lowered as the chain 15 moves. Since the gear box 14 is capable of transmitting only rotational torque from the operating handle 7 side, the gear box 16 prevents movement of the chain 15 due to the weight of the head box 4 and the slats 6. It is designed to prevent the weight from falling.

An angle adjustment shaft 17 of the slats 6 is rotatably supported in the head box 4, and by rotation of the angle adjustment shaft 17, the angle of each slat 6 is adjusted in the same phase via the ladder cord 5. .

A transmission shaft 19 is connected to one end of the angle adjustment shaft 17 via a clutch device 18 to constitute a slat drive shaft.A drive gear 20 is fixed to the tip of the transmission shaft 19, and the drive gear 20 is connected to the sprocket 14a. , 14b mesh with the rear side of the chain 15 stretched in parallel. Therefore,
When the front chain 15 moves and the head box 4 is raised or lowered, the rear chain 15 moves in the opposite direction, causing the drive gear 20 to rotate, and the rotation is transmitted through the transmission shaft 19 and the clutch device 18 to change the angle. The signal is transmitted to the adjustment shaft 17.

As shown in FIG. 3, the clutch device 18 is rotatably supported in a case 21 by a driving member 22 and a driven member 23 with a clutch ring 24 formed of synthetic resin in between, and the driving member 22 is connected to the The shaft 19 is connected to the driven member 23, and the angle adjustment shaft 17 is also connected to the driven member 23. The driven member 23 is pressed against the clutch ring 24 by the biasing force of a coil spring 25, and has a locking protrusion 26 that projects in the radial direction at its tip. The driven member 23 rotates together with the driving member 22 due to the frictional force between the clutch ring 24, the driving member 22, and the driven member 23, and the rotation of the transmission shaft 19 is transmitted to the angle adjustment shaft 17, as shown by the chain line in FIG. When the locking protrusion 26 comes into contact with the case 21 to prevent further rotation of the driven member 23 as shown in , the driving member 22 rotates idly relative to the driven member 23, and in this state, the slat 6 is rotated in the vertical direction. It is designed to be held in

Next, the operation of the head box elevating vine blind constructed as described above will be explained.

Now, when raising and lowering the slats 6 of this blind, when the operating handle 7 is taken out from the storage groove 7a of the vertical stile 2a and rotated, the chain 15 moves to the sprocket 148.1.
4t), and as the chain 15 moves, the head box 4 is raised and lowered while being held horizontally by the guide cords 10 and 11. At this time, for example, when the head box 4 moves up, the rear chain 15 that meshes with the drive gear 20 moves down, so that the chain 15, which has a length twice as long as the moving distance of the head box 5, is connected to the drive gear 2.
0, and the drive gear 20 is rotated at high speed. If the locking protrusion 26 is not in contact with the case 21 as shown by the solid line in FIG. 4 when the head box 4 starts to rise, the transmission shaft 19 and the angle adjustment shaft 17 will rotate together. , the slat 6 is rotated,
After the slat 6 is rotated vertically and the locking protrusion 26 comes into contact with the case 21 as shown by the chain line in the figure, rotation of the angle adjustment shaft 17 is prevented, and the slat 6 is held in the vertical direction. The head box 4 is raised in this state.

As described above, in this blind, the slats 6 are rotated when the head box starts moving up and down, and the relative movement distance of the chain 15 with respect to the drive gear 20 can be made twice the movement distance of the head box 4. The vertical distance of the head box 4 during angle adjustment can be reduced. Therefore, when adjusting the angle of the slats 6 by slightly lowering the head box 4 from the state where it has been pulled up to the highest position, the descending distance of the head box 4 can be reduced, so that The upper stile 3a of the sash 1 can be made smaller.

Although a chain was used as the driving cable in the above embodiment, a timing belt may also be used.

Effects of the Invention As detailed above, the present invention raises and lowers the slats by raising and lowering the head box using a lifting device provided in the vertical frame of the sash, and also adjusts the angle of the slats based on the raising and lowering of the head box. The head box elevating type blind exhibits an excellent effect of reducing the moving distance of the head box when adjusting the angle of the slats 6.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of a head box elevating type blind embodying the present invention, Fig. 2 is a front view of a double glass sash, Fig. 3 is a plan view of the clutch device, and Fig. 4 is a longitudinal sectional view of the clutch device. It is. Double glass sash 1, vertical [2a, head box 4, slat 6, operating handle 7 as operating means, chain 15 as driving cable, angle adjustment shaft 17 as slat driving shaft, transmission shaft 19° as slat driving shaft Patent applicant: Tachikawa Blind Industry Co., Ltd. Agent: Patent attorney On 1) Hironobu Figure 2

Claims (1)

[Claims] 1. In a head box elevating type blind, in which the slats are raised and lowered by raising and lowering the head box with a lifting device installed in the vertical stile of the sash, and the angle of the slats is adjusted based on the raising and lowering of the head box, the vertical stile (2
a) An endless drive cable (15) is stretched inside, and the drive cable (15) can be moved from outside the sash (1) using the operating means (7), and one of the drive cables (15) is The head box (4) is attached, and one end of the slat drive shaft (17, 19) rotatably supported within the head box (4) is engaged with the other end of the drive cable (15). ) as the slat drive shaft (17, 1
9) A slat drive device for a head box elevating type blind, characterized in that it can be rotated.