JP2620388B2 - Roll blind screen lifting device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a screen raising / lowering device for a roll blind, which is provided on a window surface and adjusts the amount of light taken from outside.

[Conventional technology]

Conventionally, there is a roll blind as shown in FIG. That is, a screen 2 is suspended from a take-up shaft 1 rotatably supported on an upper portion of a window, and a bottom bar 3 is attached to a lower end of the screen 2. The base of the rotating arm 4 is rotatably supported by the lower end of the guide rail 5 fixed to the window frame 8.
An operating device provided at one end of the winding shaft 1 hangs down an operating handle 6 as shown in FIG. 1 via a universal joint 6a. When the operating handle 6 is operated to rotate the winding shaft 1, a screen is displayed. The screen 2 is wound on the winding shaft 1 or unwound and the screen 2 is raised and lowered. At this time, the bottom bar 3 is raised and lowered while rotating around the base end of the rotating arm 4 as a fulcrum.

Therefore, in such a roll blind, when the screen 2 is stopped in a state where the screen 2 is lowered halfway, the screen 2 can be used as an eave-shaped shade as shown in FIG.

[Problems to be solved by the invention]

In the roll blind as described above, the operation handle 6
Is operated, the normal operator pulls the operation handle 6 toward the room side to operate as shown by the chain line in FIG.
However, since the operation handle 6 is hung down from the end of the case 1 and is close to the window frame 8 so as not to impair the beauty of the roll blind, the operation handle 6 is tilted toward the center of the screen 2 during the operation. There is a problem in that it is necessary to draw in to the indoor side, and the window frame 8 becomes an obstacle during the rotation operation, so that a smooth rotation operation cannot be performed.

An object of the present invention is to provide a roll blind in which an operation handle hanging from a case can be smoothly rotated without being disturbed by a window frame, and the aesthetic appearance is not impaired by the operation handle.

[Means for solving the problem]

In order to solve the above problems, the present invention hangs a screen from a winding shaft rotatably supported on an upper portion of a window,
In a roll blind in which the screen is raised and lowered by rotating the operating handle suspended from a winding shaft driving device provided at one end of the winding shaft to rotate the winding shaft, the operating handle is parallel to the winding shaft. It is configured to be movably suspended on the provided transmission shaft.

[Action]

By the above means, when operating the operation handle, the operation handle can be moved toward the center of the screen and separated from the window frame, and when not operated, the operation handle can be moved to the end of the case and drooped near the window frame. The beauty of the roll blind can be improved.

〔Example〕

An embodiment of the present invention will now be described with reference to FIGS.
Description will be made with reference to the drawings.

The roll blind shown in FIG. 1 has a take-up shaft 1, a screen 2 suspended from the take-up shaft 1, a bottom bar 3 attached to the lower end of the screen 2, and both ends of the bottom bar 3. The pivot arm 4, the guide rail 5 and the pivot arm 4 on which the base end of the pivot arm 4 is rotatably supported have the same configuration as that of the conventional example.

One end of an auxiliary arm 7 is rotatably supported at the base end of the rotary arm 4, and the other end of the auxiliary arm 7 extends vertically along a guide rail 5 via a first cam shaft 27 described later. It is movably supported. When the winding shaft 1 is rotated by operating an operation handle 6 which is hung from an operating device provided at one end of the winding shaft 1, the screen 2 is wound up or unwound by the winding shaft 1. Is raised and lowered. The rotating arm 4 is formed so as to be extendable and contractible with the outer cylinder 4a and the inner cylinder 4b, and the bottom bar 3 is attached to the tip of the inner cylinder 4b. The position where the bottom bar 3 is supported by the inner cylinder 4b is offset from the center line of the outer cylinder 4a toward the winding shaft 1, and the rotating arm 4 is rotated to the lower limit position along the window frame 8 from the winding shaft. The upward pulling force acting on the screen 2 when the screen 2 is pulled up by rotating the rotation arm 1 acts on the rotating arm 4 as an upward rotating force.

As shown in FIG. 1, the operating handle 6 is always suspended in a rod shape. During operation, the lower end is bent into a crank shape as shown by a dashed line in FIG. Second
As shown in the figure, the rotational force generated by operating the operation handle 6 is applied to a gear box supported by a case 10 that accommodates the winding shaft 1.
It is transmitted to 11. That is, as shown in FIG. 3, the bevel gears 12a and 12b meshing with each other are rotatably supported on the gear box 11, and the bevel gear 12a whose axis is in the vertical direction is outside the gear box 11 via the universal joint 6a. The operation handle 6 is suspended and supported, and a hexagonal hole 14 is formed in a shaft portion of the bevel gear 12b whose axis is lateral as shown in FIG. A transmission shaft 15 formed of a hexagonal shaft connected to the transmission shaft 15 is penetrated, and the bevel gear 12b is movable along the transmission shaft 15 and rotates integrally with the transmission shaft 15.

As shown in FIG. 4, the gear box 11 is movably supported in a cylindrical portion 10a provided at a lower portion of the case 10. That is, the cylindrical portion 10a has an opening at the center of the lower side, and a lower guide ridge projecting upward on both sides of the opening.
An upper guide ridge 17 projects downward from the upper side so as to face the lower guide ridge 16. A guide recess 18 is formed on the upper and lower surfaces of the gear box 11 to engage with the upper and lower guide projections 17, 16.
The guide projections 16 and 17 are engaged with the guide recess 18. Accordingly, the gear box 11 is supported movably along the guide ridges 16 and 17 in the cylindrical portion 10a.

As shown in FIG. 2, one end of the transmission shaft 15 is
It is rotatably supported by a gear case 19 provided at the end,
The other end is rotatably supported by a bearing 20 fixed to the tubular portion 10a at a position separated from the gear case 19 by about 200 mm. With such a configuration, when an operation force in the left-right direction in FIG. 3 is applied to the gear box 11 via the operation handle 6, the gear box 11 moves within the cylindrical portion 10a between the gear case 19 and the bearing 20. In the gearbox 11, the transmission shaft 15 always passes through the bevel gear 12b. Therefore, regardless of the position of the gear box 11 within the above range, when the operation handle 6 is rotated, the transmission shaft 15 is rotated via the bevel gears 12a and 12b.

In the gear case 19, three spur gears 21a are vertically arranged,
21b and 21c are rotatably supported in a state of being meshed in series, and the transmission shaft 15 is fitted to the rotation axis of the lower spur gear 21a. When the spur gear 21a is rotated based on the rotation of the transmission shaft 15, the spur gear 21c is rotated via the spur gear 21b.
Is to be rotated. When excessive torque acts between the transmission shaft 15 and the spur gear 21a, the spur gear 2
A clutch device that causes the transmission shaft 15 to idle with respect to 1a is interposed.

An output shaft 22 protruding out of the gear case 19 is formed on one side of the upper spur gear 21c, and one end of the winding shaft 1 is fitted to the output shaft 22. Therefore, when the spur gear 21c is rotated, the winding shaft 1 is rotated. One end of the winding shaft 1 has a winding shaft 1 based on the weight of the screen 2 and the bottom bar 3.
A known stopper 23 for preventing rotation of the screen 2 and a known reducing device 24 for reducing the operating force when the screen 2 is wound up.
Are formed.

Next, a description will be given of a configuration of a swing preventing device that prevents the bottom bar 3 and the rotating arm 4 from swinging when the screen 2 projects in an eaves shape.

As shown in FIG. 5, guide grooves 25 are formed on both side surfaces of the guide rail 5 in the guide portion of the auxiliary arm 7 in a straight line in the vertical direction. A plurality of recessed recesses 26 are provided, and a mark 26a is formed at a position slightly below each recess 26.

As shown in FIG. 6, a first cam shaft 27 is supported at the tip of the auxiliary arm 7 in the guide rail 5,
An upper portion of a first runner 29 is rotatably supported by the first camshaft 27, and a second camshaft 28 is rotatably supported by a lower portion of the first runner 29. As shown in FIG. 5, both ends of the cam shafts 27 and 28 protrude into the guide groove 25 and can move along the guide groove 25. Therefore, when the rotating arm 4 is rotated, the first runner 29 moves up and down along the guide groove 25.

A second runner 30 is provided around the first runner 29. That is, the second runner 30 has an upper receiving portion 32 and a lower receiving portion 33 formed at the upper and lower portions of the connecting plate 31, and the upper receiving portion 32, the lower receiving portion 33, the connecting plate 31, and the inner surface of the guide rail 5 The first runner 29 is disposed so as to be able to move up and down in the space formed by.

The upper accommodating portion 32 and the lower accommodating portion 33 are formed in a groove shape that opens toward the screen 2, and a coil spring 34 and a pressure contact piece 35 are disposed therein. And
As shown in FIG. 9, both ends of the pressure contact piece 35 abut against the edge of the guide groove 25 of the guide rail 5, and the pressure contact piece 35 and each of the receiving portions 32, 33
A coil spring 34 is disposed between the pressure contact piece 35 and the bottom surface of the housing 32, and the pressure contact piece 35 is constantly urged in the opening direction of each of the housing portions 32 and 33.
With such a configuration, the second runner 30 is
The two accommodating portions 32 and 33 and the connecting plate 31 are pressed against the guide rail 5 with the pressure contact piece 35 contacting the edge as a fulcrum. Therefore, the guide rail 5 is set so that it does not descend by its own weight due to friction with the guide rail 5 due to this pressing force.
When the first runner 29 ascends with the first runner 29 abutting on the upper accommodating portion 32 as shown in the figure, or descends with the first runner 29 abutting on the lower accommodating portion 33 as shown in FIG. At this time, the second runner 30 moves up and down in the guide rail 5 together with the first runner 29.

As shown in FIG. 6, in a state where the lower end of the first runner 29 is in contact with the lower accommodating portion 33 of the second runner 30, a connecting plate between the upper part of the first runner 29 and the second runner 30 is provided. A predetermined gap is provided between the first camshaft 27 and the first camshaft 27.
7, the first runner 29 is rotatable about the second cam shaft 28 as a fulcrum, as shown in FIG.

In addition, a rotation restricting portion 36 protruding toward the first runner 29 is formed on the upper portion of the connecting plate 31, and as shown in FIG. 8, in a state where the first runner 29 is in contact with the upper accommodation portion 32, Even if the first camshaft 27 can enter the locking concave portion 26 of the guide groove 25, the upper part of the first runner 29 comes into contact with the rotation restricting portion 36 to prevent its rotation. I have.

As shown in FIG. 1, the bottom bar 3
The screen 2 is rewound from the winding shaft 1 and the rotating arm 4 is rotated downward to a position along the window frame 8 as shown by a chain line in FIG. Further, the screen 2 is rewound so that the outer cylinder of the rotating arm 4
When the inner cylinder 4b is pulled out from the 4a and the bottom bar 3 is engaged with the holder 37, the entire surface of the window is covered with the screen 2.

Next, the operation of the roll blind configured as described above will be described.

When the screen 2 is moved up and down, as shown in FIG. 1, the operating handle 6 hung down from the cylindrical portion 10a of the case 10 is drawn toward the interior of the room as shown by a chain line in FIG. When the operating handle 6 is rotated in this state, the transmission shaft 15 is rotated via the bevel gears 12a and 12b in the gear box 11, and the spur gears 21a, 21b,
The winding shaft 1 is rotated via 21c, and the screen 2 is moved up and down based on the rotation of the winding shaft 1. At this time, if the operating handle 6 is moved toward the center of the window along the cylindrical portion 10a along with the gear box 11 and pulled toward the room side in this state, the window handle 8 and the guide rail 5 do not interfere. The operation handle 6 can be easily operated. Further, after the operation, if the gear box 11 is moved to the vicinity of the gear case 19 along the cylindrical portion 10a, the operation handle 6 is hung down near the window frame 8 and the aesthetic appearance of the roll blind is not spoiled.

When the screen 2 is lowered by operating the operation handle 6 as described above, the rotating arm 4 is rotated downward, and the auxiliary arm 7 is also moved downward. The one runner 29 abuts on the lower accommodating portion 33 of the second runner 30, and both runners 29, 30 move integrally along the guide groove 25 of the guide rail 5.

Following the lowering operation of the screen 2, when the screen 2 is held in a state of being overhanged like an eaves,
As shown by the solid line in FIG.
The lowering operation of the screen 2 is stopped when reaching between any one of the locking recesses 26 and the marking 26a formed below the locking recess 26, and then the operation handle 6 is rotated in the screen 2 lifting direction. I do. Then, the turning arm 4 is turned upward, and a pressing force in the direction of arrow A in FIG. 6 acts on the first runner 29 via the auxiliary arm 7. Then, both ends of the first camshaft 27 enter the locking recess 26 as shown by a chain line in FIG. 5 and are prevented from moving further, so that the first runner 29 It is rotated as shown in FIG. Therefore, if the operation of the operation handle 6 is stopped in this state, the upward movement of the auxiliary arm 7 is prevented, so that even if the screen 2 is blown by the wind, the rotation arm 4 and the bottom bar 3 are surely fluttered. Is prevented. The locking recesses formed at four places on the guide rail 5
Reference numeral 26 denotes a state in which the screen 2 has been wound up to the upper limit and the rotating shaft 4 has been rotated vertically so as to be 40 degrees, 65 degrees, and 90 degrees downward, respectively.
The rotation arm 4 is formed at a position where the rotation arm 4 can be held at an angle of 135 degrees.

When the screen 2 is pulled up from the state where the first camshaft 27 is held in the locking recess 26 as described above, the operation handle 6 is rotated in the screen 2 lowering direction to lower the first runner 29. After the first camshaft 27 reaches below the mark 26a, the screen 2 is wound up. Then, a pressing force in the direction of arrow A in FIG. 6 acts on the first camshaft 27, but since both ends of the first camshaft 27 are supported only by the guide grooves 25 and can only move upward, Before the first runner 29 is moved upward and the first camshaft 27 reaches the locking recess 26, the upper end of the first runner 29 is moved to the upper housing portion 32 of the second runner 30 as shown in FIG. , And the first and second runners 29, 30 move upward integrally. In this state, the upper portion of the first runner 29 abuts against the rotation restricting portion 36 to prevent its rotation, so that the first camshaft 27 does not enter the locking concave portion 26 and the guide groove 25 The inside is guided upward. Therefore, as the screen 2 is wound up, the turning arm 4 is turned upward.

As described above, when the screen 2 is held in an eaves shape, the screen 2 is lowered to position the first camshaft 27 between any one of the locking recesses 26 and the engraving 26a thereunder, When the screen 2 is slightly lifted from this state, the first camshaft 27 is held by the locking concave portion 26, and the upward rotation of the rotary arm 4 is prevented. Accordingly, the first camshaft 27 can be held in the locking concave portion 26 only by the raising / lowering operation of the screen 2 by the operation handle 6 to easily prevent the rotating arm 4 and the bottom bar 3 from fluttering, and also to use a spring or the like. As a result, the downward turning force is not always applied to the rotating arm 4, so that the operating force does not increase.

〔The invention's effect〕

As described in detail above, the present invention enables the operation handle hanging from the case to be smoothly rotated without being disturbed by the window frame, and a roll blind screen that does not impair the aesthetic appearance due to the operation handle. An excellent effect that can provide a lifting device is exhibited.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a roll blind embodying the present invention, FIG. 2 is a sectional view of the operating device, FIG. 3 is a sectional view showing a main part of the operating device, and FIG. FIG. 5 is a side view of the guide rail, FIGS. 6 to 8 are cross-sectional views showing the operation of the first and second runners in the guide rail, and FIG. FIG. 10 is a side view showing a conventional roll blind according to the present invention. Winding shaft 1, screen 2, operation handle 6.

Claims (1)

(57) [Claims] 1. An operation in which a screen (2) is suspended from a winding shaft (1) rotatably supported on an upper portion of a window, and is suspended from a winding shaft driving device provided at one end of the winding shaft (1). In a roll blind in which the screen (2) is raised and lowered by rotating the handle (6) to rotate the winding shaft (1), the operating handle (6) is provided in parallel with the winding shaft (1). A screen raising / lowering device for a roll blind, wherein the device is suspended movably on a transmission shaft (15).