JPH0639869B2 - Blind slat lifting device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a blind slat lifting device.

(Prior art) Conventionally, for example, as one type of blind built into a double-glazed sash, an elevating cord is stretched inside the vertical frame of the sash, and the operating knob connected to the elevating cord is exposed to the outside of the vertical frame However, the one in which the operating knob is operated to raise and lower the slats has been put into practical use.

(Problems to be solved by the invention) However, in the slat lifting device as described above, the operation stroke of the operating knob needs to be set to a size commensurate with the lifting stroke of the slat. There is a problem that the operation hole becomes large and is not good in appearance, and that the operation hole impairs the airtightness inside and outside the sash, causing dew condensation in the double glass.

Structure of the Invention (Means for Solving the Problems) In order to solve the above problems, the present invention stretches an endless lifting cord inside the vertical frame of the sash, and operates the lifting cord to move the slats. In the vertically moving blind, an operation hole 20 is provided in the vertical frame 2, and an operation box 21 is supported in the operation hole 20 so that the operation box 21 can be moved up and down. The engaging means 24a, 24b, 27a, 27b for blocking the movement of the lifting cord 12 with respect to the operation box, and the operation of the engaging means for the movement to one of the lifting cords 12 are selected and released. Selection canceling means 30, 3
2a and 32b.

(Operation) By the above means, if the operation box 21 is reciprocated up and down in the operation hole 20, the selection releasing means 30, 32a, 32b.
The slat 6 is raised or lowered based on the selection by.

(Embodiment) An embodiment embodying the present invention will be described below with reference to the drawings. In the double glass sash 1 shown in FIG. 1, a head box 4 is built in such a manner that it can be vertically moved between the vertical frames 2 and 3 on both sides. ,
A number of slats 6 are suspended from and supported by the head box 4 via ladder cords 5. When the head box 4 is lowered, the lower slat 6 is sequentially stacked and folded under the sash 1 so that the head box 4
It is designed to be pulled up from the upper slat 6 with the rise of.

Guide rollers 7 and 8 are rotatably supported at both ends of the head box 4, and the upper and lower ends of the guide rollers 7 and 8 are fixed to the vertical frames 2 and 3, respectively. 10 are respectively hung. That is, the upper end of the first guide cord 9 is fixed to the upper part of the one vertical frame 2, and the lower end of the first guide cord 9 passes below the one guide roller 7 and above the other guide roller 8 to the lower part of the other vertical frame 3. The second guide cord 10 is fixed so that its upper end is fixed to the upper part of the other vertical frame 3 and its lower end is fixed to the lower part of the one vertical frame 2 through the lower part of the guide roller 8 and the upper part of the guide roller 7. There is. Therefore, as described above, the first and second guide cords 9 and 10 are
When the head box 4 is tensioned by being hung on the head box 8, the head box 4 is always lifted while being held in the horizontal direction.

Pulleys 11 are rotatably supported at both upper and lower ends in one vertical frame 2, and endless lifting cords 12 are hung between the pulleys 11. One end of the head box 4 is connected to the elevating cord 12, and the elevating cord 12 is moved between the pulleys 11 to move the head box 4.
Can be raised and lowered.

A stopper device 13 for preventing the weight of the head box 4 from falling is provided on the upper part of the vertical frame 2. The structure is No. 10
In the stopper device 13, the base end of a support shaft 14 is fixed to the vertical frame 2, and the support shaft 14 has a clutch inner ring 15 in which a one-way clutch mechanism (not shown) is built.
And the clutch outer ring 16 are fitted, and the clutch outer ring 1
A pulley 17 is fitted on the pulley 6. A friction plate 18 is fixed to the tip of the support shaft 14, and the flange portion 15a of the clutch inner ring 15 is pressed against the friction plate 18 by the urging force of the coil spring 19 with the base end of the support shaft 14 as a fulcrum.

In the stopper device 13 configured as described above, the lifting cord 12 is wound around the pulley 17 once, and when the lifting cord 12 is moved by the pulling operation of the head box 4, the clutch outer ring 16 is rotated. It becomes freely rotatable with respect to the clutch inner ring 15, and the pulley 17
Is a lifting cord 1 associated with the lowering operation of the head box 4.
When the pulley 17 is about to be rotated by the movement of 2, the clutch outer ring 16 becomes unrotatable with respect to the clutch inner ring 15, and the elevating ode 12 is held immovable with the friction plate 18 as a fulcrum. The head box 4 can be lowered by operating the elevating cord 12 with a force greater than the frictional force between the clutch inner ring 15 and the friction plate 18.

As shown in FIG. 1, an operating hole 20 is formed in the vertical center of the vertical frame 2, and the operating box 2 is provided in the operating hole 20.
1 is movably supported up and down. The elevating cord 12 is inserted through the operation box 21, and the elevating cord 12 is moved by operating the operation box 21 so that the head box 4 can be moved up and down. The structure of the operation box 21 will be described below.

As shown in FIG. 2, the operation box 21 is provided so as to be vertically slidable within the range of the operation hole 20 formed in the vertical frame 2, and the operation box 21 is sealed so as to extend the front surface thereof. The plate 22 is attached and slides along the operation hole 20 together with the operation box 21 to constantly close the opening of the operation hole 20 to seal the inside and outside of the sash 1.

An insertion hole 23 is formed in the top plate and the bottom plate of the operation box 21, and the lifting cord 12 is inserted between the insertion holes 23. A pair of fixed rollers 24a and 24b are rotatably supported at the rear of the operation box 21, and the outer surfaces of the fixed rollers 24a and 24b are formed with irregularities for preventing slippage. A pair of slopes 25a and 25b extending in the direction of the fixed rollers 24a and 24b, respectively, are formed above and below the front inner surface of the operation box 21, and the slopes 25a and 25b are formed with step-like irregularities.

Above the upper fixed roller 24a and lower fixed roller 24b
A position regulating shaft 26 having both ends supported on the front and rear inner side surfaces of the operation box 21 is provided below the position regulating shaft 26.
Movable rollers 27a and 27b are arranged in spaces covered by the fixed rollers 24a and 24b and the slopes 25a and 25b, respectively. The elevating cord 12 is inserted between the upper fixed roller 24a and the upper movable roller 27a and between the lower fixed roller 24b and the lower movable roller 27b, respectively, and the movable rollers 27a and 27b are moved vertically. Accordingly, the position regulating shaft 26 and the fixed rollers 24a, 24b can move along the slopes 25a, 25b.

That is, when the elevating cord 12 is moved upward relative to the operation box 21, the upper movable roller 27a moves upward along the slope 25a and becomes idle as the elevating cord 12 moves. When the cord 12 is relatively moved downward, the cord 12 is moved downward along the slope 25a to sandwich the lifting cord 12 with the upper fixed roller 24a. Also, the lower movable roller 27b is the lifting cord 1
When 2 is moved relative to the lower side, it moves downward along the slope 25b and becomes idle after the movement of the lifting cord 12, and when the lifting cord 12 is moved upward, it moves upward along the slope 25b. To the same lifting code 12
Is sandwiched between the lower fixed roller 24b and the lower fixed roller 24b. Therefore, the fixed rollers 24a, 24b and the movable rollers 27a, 27b act as engaging means for preventing relative movement of the lifting cord 12 with respect to the operation box 21.

A cam shaft 28 is rotatably supported at the center of the front plate of the operation box 21, and a proximal end of an operation knob 29 protruding forward is rotatably supported by the cam shaft 28. By operating with the operation knob 29, the operation box 21 can be moved up and down within the range of the operation hole 20.

A cam 30 that projects into the operation box 21 is provided at the base end of the cam shaft 28, and the cam 30 has a cam contact portion 31.
The a and 31b are in contact with each other so as to sandwich the cam 30 from above and below. The cam contact portions 31a, 31b are pressing rods 32a for pressing the movable rollers 27a, 27b, respectively.
It is provided at the base end of 32b, and is provided with a pressing rod 32a,
32b is vertically movably supported by a support piece 33 protruding from the inner surface of the operation box 21, and coil springs 34 are provided between the support piece 33 and the cam contact portions 31a and 31b, respectively. The cam contact portions 31 a and 31 b are always in contact with the cam 30 by the urging force of the coil spring 34 with 33 as a fulcrum. And the second
As shown in FIGS. 4 and 5, when the cam 30 is located below the cam shaft 28, the tip of the lower pressing rod 32b presses the lower movable roller 27b downward. The clamping operation of the lifting cord 12 due to 24b is prevented, and the cam shaft 2
When the cam 8 is rotated 180 degrees and the cam 30 is located above the cam shaft 28 as shown in FIGS. 3 and 5, the tip of the upper pressing rod 32a presses the upper movable roller 27a upward. In the above, the operation of sandwiching the lifting cord 12 by the upper movable roller 27a and the upper fixed roller 24a is prevented. Therefore, the cam 30 and the pressing rods 32a and 32b act as a selection canceling unit that selects the relative movement direction of the lifting cord 12 with respect to the operation box 21.

As shown in FIG. 6, a concave portion 35 is formed on the front surface of the operation box 21 downward from the cam shaft 28 support portion. Then, as shown in FIG. 4 or 5, the cam 3
When 0 is positioned above or below the cam shaft 28, the operating knob 29 can be rotated downward to be housed in the recess 35.

An elongated display hole 36 is formed above the recess 35, and a display piece 37 projects from the upper cam contact portion 31a into the display hole 36. Therefore, based on the position of the display piece 37 in the display hole 36, the position of the cam 30, that is, which movable roller operation is restricted is displayed.

An angle adjusting device 38 for adjusting the angle of the slat 6 based on the elevation of the head box 4 is provided in the head box 4. The angle adjusting device will be described next.
As shown in the figure, a hexagonal rod-shaped angle adjusting shaft 39 is rotatably supported in the head box 4, and the angle adjusting shaft 39
The upper ends of the ladder cords 5 are supported by, and the slats 6 are angularly adjusted by driving the ladder cords 5 based on the rotation of the angle adjusting shaft 39.
An exchange shaft 40 is fitted and fixed to a middle portion in the longitudinal direction of the angle adjusting shaft 39, and a spiral groove 41 is formed on the outer peripheral surface of the conversion shaft 40 over the entire length thereof.

A nut 43 is fitted and fixed to a central portion of an actuation box 42 that is movably provided in the head box 4, and the conversion shaft 40 is screwed into the nut 43. Therefore, the reciprocating motion of the operation box 42 in the head box 4 is caused by the action of the nut 43 and the conversion shaft 40.
It is designed to be converted into the rotational movement of.

A pair of fixed rollers 44a are provided on the upper portion of the operation box 42 as engaging means for engaging with the first guide cord 9.
44b, movable rollers 45a and 45b, slopes 46a and 46
b, a position regulating shaft 47 is provided, and pressing rods 48a and 48b as engagement releasing means are projected from the inner side surface of the head box 4 at both sides in the moving direction of the actuation box 42 at a predetermined interval to allow the actuation box 42 to move. The movable rollers 45a and 45b can be pressed based on the movement. The first guide cord 9 is inserted between the movable roller and the fixed roller that face each other.

Next, the operation of the headbox lifting blind constructed as above will be described.

When lowering the slat 6 of the blind, first, the operating knob 29 is operated to rotate the cam width 28, and the cam 30 is moved to move the lower pressing rod 32b as shown in FIGS. 2 and 4. Then, the lower movable roller 27b is pressed downward. In this state, the operation box 21 is pulled up while holding the operation knob 29. Then, since the elevating cord 12 tries to move downward in the operation box 21, the upper movable roller 27a descends along the slope 25a as shown in FIG. 12 is sandwiched. In this state, the downward movement of the lifting cord 12 is prevented, so that the lifting cord 12 is pulled upward together with the operation box 21. At this time, an operating force for moving the lifting cord 12 against the frictional force of the stopper device 13 is required.

After the operation box 21 is pulled up to the upper edge of the operation hole 20, the operation box 21 is pulled down to the lower edge. At this time, since the up / down cord 12 can be relatively moved upward in the operation box 21, only the operation box 21 is pulled down without moving the up / down cord 12. Then, if the operation box 21 is pulled up from the lower edge of the operation hole 20, the elevating cord 12 is pulled up together with the operation box 21, and the elevating cord 12 is repeated by repeating such an operation.
Can be moved to lower the head box 12 and each slat 6.

On the other hand, when the slat 6 is pulled up, first, the operation knob 29 is operated to rotate the cam shaft 28, and then the slat 6 is rotated as shown in FIGS.
As shown in the figure, the cam 30 is moved to move the upper push bar 32a.
The upper movable roller 27a is pressed upward.
In this state, the operating knob 21 is held and the operating box 21 is pushed downward. Then, since the elevating cord 12 tries to move upward in the operation box 21, the lower movable roller 27b rises along the slope 25b as shown in FIG. 1
2 is sandwiched. In this state, since the relative movement of the lifting cord 12 upward is prevented, the lifting cord 12 is pushed downward together with the operation box 21.

After the operation box 21 is pushed down to the lower edge of the operation hole 20, the operation box 21 is pulled up to the upper edge of the operation hole 20.
At this time, the lifting cord 12 in the operation box 21
Since the relative movement of the lifting cord 12 is freely possible,
Only the operation box 21 is pulled up without moving. Then, if the operation box 21 is pushed down from the upper edge of the operation hole 20, the elevating cord 1 together with the operation box 21 is pushed.
2 is pushed down, and by repeating such an operation, the lifting cord 12 can be moved to pull up the head box 4 and each slat 6.

Further, as the head box 4 moves up and down, the first and second guide cords 9 and 10 are moved in opposite directions in the head box 4. At this time, for example, as shown in FIG. 8, the movable rollers 45a and 45b in the operation box 21 are arranged.
When the first guide coat 9 is moved in the direction of arrow A, that is, in the pulling up direction of the headbox 4 in a state where neither of them is pressed by the pressing rods 48a, 48b, the right movable roller 45a is moved in the same direction to the right. The first guide cord 9 is sandwiched between the portion fixing roller 44a. Then, the relative movement of the first guide cord 9 with respect to the actuation box 42 in the same direction is prevented, so that the actuation box 42 is moved in the same direction together with the first guide cord 9, and the movement of the actuation box 42 is accompanied. Then, the angle adjusting shaft 39 is rotated and the slats 6 are adjusted in angle.

When the actuating box 42 is moved in the direction of arrow A and the right movable roller 45a comes into contact with the pressing rod 48a as shown in FIG. 7, both the rollers 44a and 45a move the lifting cord 12 up and down.
Is removed, and only the first guide cord 9 is movable in the same direction, and the head box 4 is pulled up.

On the other hand, when the head box 4 is pulled down from the state shown in FIG. 7 and moved in the direction of arrow B of the first guide cord 9, the left movable roller 45b is moved to move the first movable roller 45b to the left fixed roller 44b. The one guide cord 9 is clamped. Then, since the relative movement of the first guide cord 9 with respect to the actuation box 42 in the same direction is blocked, the actuation box 42 is moved in the same direction together with the first guide cord 9,
With the movement of the operation box 42, the angle adjusting shaft 3
9 is rotated and the slats 6 are angularly adjusted. And
When the actuating box 42 is moved in the direction of arrow B and the left movable roller 45b comes into contact with the pressing rod 48b as shown in FIG. 9, the nipping by both rollers 44b and 45b is released, and the first guide cord is released. Only the box 9 and the slat 6 are lowered so that only 9 can move in the same direction. Therefore, in the angle adjusting device 38, the operating box 42 moves integrally with the first guide cord 9 and the angle adjusting shaft 39 when the movable rollers 45a and 45b are not in contact with any of the pressing rods 48a and 48b. Rotate
Each slat 6 is set to be rotated 180 degrees while the operating box 42 moves from one side to the other side between the pressing bars 48a and 48b.

As described above, this headbox lift blind is
First and second guide cords 9, 10 whose upper and lower ends are fixed to the vertical frames 2, 3 are hooked on guide rollers 7, 8 at both ends of the head box 4, and one first guide cord 9 is attached.
Has its upper end fixed to the upper part of one vertical frame 2 and its lower end fixed to the lower part of the other vertical frame 3 through one guide roller 7 below and the other guide roller 8 above. The upper end of 10 is fixed to the upper part of the other vertical frame 3, and the lower end of the same 10 is fixed to the lower part of the one vertical frame 2 after passing through the lower part of the guide roller 8 and the upper part of the guide roller 7. When the head box 4 is stretched in a tensioned state, the head box 4 is always held in the horizontal direction. An endless lifting cord 1 provided with a stopper device 13 for preventing one side of the head box 4 from falling by its own weight.
Headbox 4 with a simple structure by driving with 2
Can be raised and lowered while always being held horizontally.

To operate the lifting cord 12, the operation knob 29 is rotated to move the movable roller 27 while pressing the push rods 32a and 32b.
With one of a and 27b pressed, the operation box 21
By reciprocating up and down within the range of the operation hole 20, the head box 4 can be operated in either an ascending or descending direction. Then, by reciprocating the operation box 21, it is possible to secure the lifting stroke of the head box 4 with a short operation stroke of the operation box 21 limited by the size of the operation hole 20. Therefore, the operation hole 20 can be made small regardless of the lifting stroke of the head box 4, but the airtightness of the operation hole 20 portion can be improved. In addition, such a head box lifting device can also be applied to a normal blind lifting device that lifts a bottom rail to lift a slat.

In addition, the flat angle adjusting device 38 of the headbox elevation blind uses the relative movement of the first guide cord 9 with respect to the headbox 4 as the headbox 4 is raised and lowered to rotate the angle adjustment shaft 39. There is. That is, the linear movement of the first guide cord 9 is converted into rotational movement by the nut 43 and the conversion shaft 40, and the angle adjustment shaft 39 is rotationally driven. Then, after the first guide cord 9 is moved by a predetermined distance, the first guide cord 9 is
The movement of the actuation box 42 associated with the movement of the first guide cord 9 is prevented, and only the first guide cord 9 is movable. Therefore, the slat 6 can be angle-adjusted by using the relative movement of the first guide cord 9 with respect to the head box 4 as the head box 4 moves up and down, so that the slat angle adjusting device is built in the vertical frame 2. There is no need, and after the slat 6 is vertically rotated, further rotation can be automatically prevented and the head box 4 can be moved up and down. In addition, such a slat elevating device can also be applied with an ordinary blind that elevates the bottom rail to elevate the slat.

Further, in the above-described embodiment, the reciprocating movement of the operating box is converted into the forward / reverse rotational movement by the action of the converting shaft 40 provided with the spiral groove 41 and the nut 43. However, the converting shaft having a twisted flat plate is used as the operating box. It may be configured so that the reciprocating movement of the actuation box is converted into forward and reverse movements based on the twist by inserting and engaging, and the angle adjusting shaft is connected to both ends of the converting shaft.

EFFECTS OF THE INVENTION As described in detail above, according to the present invention, an endless elevating cord is stretched in the vertical frame of the sash, and the elevating cord is operated to raise and lower the slats. Since the slat 6 can be moved up and down by vertically reciprocating the slat 21, it is possible to improve the aesthetic appearance of the sash 1 by making the operation hole 20 small regardless of the lifting stroke of the slat 6, and Exhibits an excellent effect of improving airtightness.

[Brief description of drawings]

FIG. 1 is a schematic view of a headbox lifting / lowering blind embodying the present invention, FIGS. 2 and 3 are sectional views showing the operation of an operation box constituting the headbox lifting device, FIGS. 4 and 5. The figure is a front view showing the operation of the cam in the operation box. Fig. 6 is a front view of the operation box.
8 and 9 are sectional views showing the operation of the slat angle adjusting device, and FIG. 10 is a sectional view of the stopper device. Double glass sash 1, vertical frame 2, lifting cord 12, operating hole 20, operating box 21, fixed rollers 24a and 24b as engaging means, movable rollers 27a and 27b, operating knob 29, cam 30 as selecting releasing means. , Push rod 32
a, 32b.

Claims (1)

[Claims] 1. A blind in which an endless elevating cord is stretched in a vertical frame of a sash, and the elevating code is operated to elevate a slat, an operating hole (20) is provided in the vertical frame (2), An operation box (21) is supported in the operation hole (20) so as to be movable up and down, and the operation box (21) is
Insert the lifting cord (12) into the operation box (21)
Engaging means (24a, 24b, 27a, 27) for preventing movement of the lifting cord (12) with respect to the operation box is provided therein.
b) and selection releasing means (30, 32a, 32b) for selectively releasing the operation of the engaging means in response to the movement of the lifting cord (12) to either one. Blind slat lifting device.