JPH0726862A - Roll screen device - Google Patents

Abstract

PURPOSE:To facilitate operation to elevate and stop a screen and to simplify the structure of a clutch. CONSTITUTION:Rotation of a pulley 30 operable by means of an operation cord 22 is transmittable to a winding pipe 16 and a clutch device 29 on which the resilient force of a winding spring is exerted is provided. The clutch device 29 comprises a fixed shaft 28 fixed to a side plate 14; a pipe support 44 relatively rotatably supported on a fixed shaft 28 and integrally rotatably coupled to the winding pipe 16; a pulley 30 relatively rotatably fitted in the fixed shaft 28: a rotary cylinder 36 relatively rotatable at a given angle with the pulley 30 and coupled in a manner to be integrally rotated; a ball 42 intercoupling the rotary cylinder 36 and the pipe support 44 and releasing coupling therebetween through relative rotation between the pulley 30 and the rotary cylinder 36: and a one-way clutch spring 38 fastening and unfastening the rotary cylinder 36 against and from the fixed shaft 28 through the rotation direction of the rotary cylinder.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a roll screen device.

[0002]

2. Description of the Related Art As a conventional roll screen device,
JP-B-63-46224 and JP-A-4-8049
There is one disclosed in Japanese Patent No. Japanese Examined Japanese Patent Publication 63-4622
In the roll screen device disclosed in Japanese Patent Publication No. 4, the winding cylinder in which the upper end of the sheet is connected so as to be able to be wound and unwound is rotated in one direction by an operation wheel. The connection between the winding cylinder and the operation wheel is performed only when the operation wheel rotates in one direction, and is released when the operation wheel rotates in the other direction. The operation wheel is rotationally driven by the operation string, and can be rotated by a predetermined angle by completely pulling down the operation string. The operation wheel is provided with a spring that constantly urges the operation string in the winding direction. When the operation string is no longer applied with a force to pull it down, the elastic force of the spring winds up the operation string. . The winding cylinder body is provided with a stop mechanism that can switch the winding cylinder body between a rotatable state and a non-rotatable state. When raising or lowering the sheet, pull up the operation string and rotate the operation wheel in one direction to rotate the take-up cylinder, and wind the sheet on the take-up cylinder or from the take-up cylinder. Unroll the sheet. At this time, even if the operation string is completely pulled down, the operation wheel rotates only a predetermined angle,
The sheet moves by a predetermined length. Then, when the operator releases the operating cord, the elastic force of the spring causes the operating wheel to wind the operating cord. When the pulling-down of the operation string is completed, the winding tubular body becomes unrotatable by the stop mechanism, and when the operation string is pulled down again, it becomes rotatable. When it is desired to further raise or lower the sheet, the operation string is pulled down again, the winding cylinder is rotated, and the operation string is again wound around the operation wheel.

Further, the roll screen device disclosed in Japanese Patent Laid-Open No. 4-80493 is provided with a biasing means for imparting a biasing force in a screen pulling direction to a winding shaft for suspending and supporting the screen, and an operation code. The clutch device that transmits the rotation of the pulley to the take-up shaft based on the screen lowering operation and rotates the take-up shaft in the screen rising direction by the urging force of the urging means based on the lowering operation of the operation cord after the lowering operation. It is provided. The clutch device is
A clutch case, which is supported by an intermediate portion of the support shaft so as to be relatively rotatable and immovable in the axial direction, and in which the output shaft of the pulley is fitted so as not to be relatively rotatable, and an intermediate portion of the support shaft provided in the clutch case. First clutch drum rotatably supported by the first clutch drum, a coil spring having one end supported by the clutch case and the other end supported by the first clutch drum, and a second clutch provided around the base of the first clutch drum. A drum, a slide groove formed on the inner peripheral surface of the clutch case, a first guide groove formed on the outer peripheral surface of the first clutch drum, and a second guide groove formed on the tip of the second clutch drum. Between the clutch ball, which is movably provided by the rotation of the clutch case, the brake drum, which is rotatably supported in the middle of the support shaft, A brake carrier, which is rotatably supported by the first end, is fitted to the brake carrier whose front end can be connected to the first clutch drum, and is fitted to the intermediate portion of the support shaft, and one end is supported by the brake carrier and the other end is supported by the first clutch drum. The ring, the brake spring fitted to the inner peripheral surface of the brake drum, the coil spring provided on the outer peripheral surface of the brake drum, and the end of the clutch case to the base end of the brake drum are covered. The operation cap is rotatably supported by the front end of the case and has one end of a coil spring fixed thereto, and a winding shaft provided on the outer peripheral surface of the operation cap. When descending the screen,
When the operation cord is pulled down and the pulley is rotated in the screen descending direction, the clutch case is rotated with it against the biasing force of the coil spring, the clutch ball is moved, and the clutch case is rotated through the first direction. The stop spring is transmitted to the clutch drum, the diameter of the stop spring is expanded, and the stop spring rotates around the support shaft together with the first clutch drum. As a result, the first clutch drum presses the brake carrier to rotate it, so that the brake spring tends to expand its diameter, so that the brake drum also rotates integrally, and the winding shaft rotates via the operation cap. To stop the screen, the operation of the operation cord is stopped, the rotation of the pulley is stopped, and a rotational force in the screen rising direction due to the elastic force of the biasing means is applied to the winding shaft, so that the winding shaft is moved by the clutch device. It is performed by fixing it to the support shaft. When winding the screen, the pulley is rotated in the screen descending direction to rotate the clutch case against the urging force of the coil spring, move the clutch ball, and rotate the clutch case through the second direction. It is transmitted to the clutch drum. As a result, the end of the brake ring is pressed by the second clutch drum to try to rotate it in the screen descending direction. This rotation is transmitted to the brake carrier via the brake spring, whereby the frictional force between the support shaft and the stop spring increases, and the brake carrier is firmly fixed to the support shaft. When one end of the brake spring is fixed to the brake carrier and the other end is further pressed, the diameter of the brake spring is reduced and the frictional force with the brake drum is reduced, allowing the brake drum to rotate with respect to the brake spring. .
Therefore, the winding shaft is rotated by the urging force of the urging means to wind up the screen.

[0004]

However, the conventional roll screen device described above has the following problems. That is, in the one disclosed in Japanese Examined Patent Publication No. 63-46224, the seat is raised and lowered by pulling down the operating string from the operating wheel, winding the operating string around the operating wheel, and then pulling down the operating string again. Since it is performed by repeating the operation, there is a problem that the operation is troublesome. Further, the device disclosed in Japanese Patent Laid-Open No. 4-80493 has a problem that the number of parts of the clutch device is large and the structure is complicated, so that the manufacturing work is complicated, the productivity is low, and the cost is high. The present invention is intended to solve such a problem.

[0005]

According to the present invention, rotation of a pulley can be transmitted to a winding pipe and cannot be transmitted to the winding pipe by rotating the pulley and a rotary cylinder relative to each other by a predetermined angle, and the winding pipe is rotated. The above problem is solved by making it possible and non-rotatable. That is, in the roll screen device of the present invention, both ends of the winding pipe (16) are rotatably supported by the side plates (14) at both ends of the set frame (12), and the winding pipe (16) includes: One end of the screen (18) is connected so that it can be wound and unwound, and the screen (18) is always connected to this.
A winding spring that applies a force that rotates in the winding direction is provided, and the rotation of the pulley (30) operable by the operation cord (22) can be transmitted to the winding pipe (16). In addition, there is provided a clutch device (29) capable of acting the elastic force of the winding spring, in which the clutch device (29) is non-rotatably attached to the side plate (14). The fixed shaft (28), a pipe receiver (44) rotatably supported by the fixed shaft (28) and integrally rotatably connected to the winding pipe (16), and the fixed shaft (28). ), Which is relatively rotatably fitted to the pulley (30), a rotary cylinder (36) which is rotatable relative to the pulley (30) by a predetermined angle and can be integrally rotated, and a pulley (36). 0) and the rotary cylinder (36), the rotary cylinder (36) and the engagement member (42) capable of connecting and disconnecting the rotary cylinder (36) and the pipe receiver (44) by the relative rotation. One-way clutch spring (38) that can be fastened and unfastened to the fixed shaft (28) depending on the rotation direction of the
And are included. The numbers in parentheses indicate the corresponding members in the examples described later.

[0006]

When the screen in the stopped state is lowered, the screen lowering operation side of the operation cord is pulled down and the pulley is rotated in the screen unwinding direction. This allows
The pulley rotates relative to the rotary cylinder by a predetermined angle, and the engaging member moves to a position where the rotary cylinder and the pipe receiver can be connected.
After the pulley and the rotary cylinder are rotated relative to each other by a predetermined angle, the pulley and the rotary cylinder are connected so as to be integrally rotatable. Therefore, a rotational force in the screen unwinding direction is applied to the one-way clutch spring to bring the rotary cylinder into a rotatable state. As a result, the rotation of the pulley is transmitted to the pipe receiver via the rotary cylinder and the engaging member. Therefore, by continuously pulling down the operation code and continuing to rotate the pulley, the winding pipe rotates to unwind the screen. When stopping the screen in the middle of descending or at the descending end, release the hand from the operation cord, stop the rotation of the pulley, and rotate the take-up pipe together with the pipe receiver in the screen take-up direction by the elastic force of the take-up spring. Let At this time, since the pipe receiver is integrally rotatably connected to the rotary cylinder by the engaging member, the rotary cylinder also rotates in the screen winding direction together with the pulley. As a result, the rotation of the rotary cylinder is restricted because a force in the screen winding direction is applied to the one-way clutch spring. Therefore, the rotation of the pipe receiver is also restrained, and the rotation of the winding pipe is stopped. When the screen is raised, the screen raising operation side of the operation cord is slightly pulled down, and the pulley is slightly rotated in the screen winding direction, so that the pulley is slightly rotated relative to the rotary cylinder. As a result, the engagement member moves to the position where the connection between the rotary cylinder and the pipe receiver is released. For this reason, the pipe receiver and the take-up pipe are in a rotatable state, so even if the operation cord is stopped from being pulled down and the hand is released, the elastic force of the take-up spring rotates the screen in the take-up direction, Take up the screen. When the screen is stopped in the middle of ascending, the screen lowering operation side of the operation code is slightly pulled down, and the pulley is slightly rotated in the screen unwinding direction, so that the pulley is slightly rotated. As a result, the engagement member moves to a position that connects the rotary cylinder and the pipe receiver. Therefore, since the rotary cylinder tries to rotate in the screen winding direction, a force in the screen winding direction is applied to the one-way clutch spring, so that the rotation of the rotary cylinder is restricted. Therefore, the rotation of the pipe receiver is also restrained, and the winding of the screen on the winding pipe is stopped. In this way, the screen can be lowered continuously by continuously pulling down the screen lowering operation side of the operation code, and the screen can be raised slightly on the screen raising operation side of the operation code. It can be continuously operated by pulling it down and releasing the hand. Stopping during the descent and the descent end of the screen can be done simply by releasing the hand from the operation code. This can be done by slightly lowering the screen descent operation side and releasing the hand. Therefore, the screen can be raised and lowered and stopped by an easy operation. Further, the rotation transmission from the pulley and the elastic force transmission from the winding spring to the take-up pipe move the engaging member by relatively rotating the pulley and the rotary cylinder to move the rotary cylinder and the pipe receiver. This is done by connecting and disconnecting and. As a result, it is possible to connect and disconnect the rotary cylinder and the pipe receiver with a clutch device having a small number of parts and an extremely simple structure.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows the entire roll screen device 10 embodying the present invention. Side plates 14 are provided at both ends of a set frame 12 for attaching the roll screen device 10 to a window frame. A winding pipe 16 is rotatably supported on the side plate 14. One end of a screen 18 is connected to the take-up pipe 16 by a screen stop plate 19 so that the screen 18 can be taken up and unwound (see FIG. 2). The take-up pipe 16 is constantly applied with a force in a direction for taking up the screen 18 by a take-up spring (not shown). The other end of the screen 18 is connected to the weight bar 20. A pulley cover 24 is provided at the left end of the take-up pipe 16 in FIG. 1, and an operation chain (operation code) 22 that can drive the take-up pipe 16 to rotate is derived therefrom. The operation chain 22 is an endless ball chain.

FIG. 2 shows a sectional view of the left end portion in FIG. Inside the left end portion of the winding pipe 16, a fixed shaft 28 having one end fixed to the side plate 14 in a non-rotatable manner is concentrically arranged. Side plate 14 of fixed shaft 28
A clutch device 29 for operating the rotation of the winding pipe 16 is provided near the side end. The clutch device 29 is
Pulley 30, rotary cylinder 36, one-way clutch spring 38
And a ball (engagement member) 42 and a pipe receiver 44. The pulley cover 24 is fixed near the end of the fixed shaft 28 on the side plate 14 side. Pulley 3
0 is fitted to the outer diameter portion of the fixed shaft 28 adjacent to the pulley cover 24 so as to be relatively rotatable, and an extension portion 32 extending in the axial direction of the fixed shaft 28 is formed on the inner diameter side thereof. In the extension portion 32 of the pulley 30, three groove portions 34 are formed at equal intervals in the circumferential direction. Also, the pulley 30
A projecting portion 35 that projects in the radial direction is formed at the end portion of the extension portion 32. An operation chain 22 capable of rotating the pulley 30 is wound around the outer diameter of the pulley 30. The rotary cylinder 36 has a cylindrical shape with a bottom, and the cylindrical portion 37 is on the outer diameter portion of the extension portion 32 of the pulley 30 and the bottom portion 39 is the fixed shaft 2.
8 are fitted to the outer diameter portions of the outer diameter portions 8 so as to be rotatable relative to each other. The groove portion 3 of the extension portion 32 is provided in the tubular portion 37 of the rotary barrel 36.
Four hole portions 40 penetrate in the radial direction at intervals corresponding to 4. Further, a cutout portion 41 into which the projection 35 of the pulley 30 is inserted so as to be relatively rotatable by a predetermined angle is formed in the bottom portion 39 of the rotary cylinder 36 with a predetermined width in the circumferential direction (see FIG. 4). The one-way clutch spring 38 is provided on the bottom portion 3 of the rotary cylinder 36.
It is provided on the outer diameter portion of the fixed shaft 28 adjacent to 9. In addition, the one-way clutch spring 38 has one end of the one-way clutch spring 38.
When the rotary cylinder 36 is rotated in the unwinding direction of the screen 18, the rotary cylinder 36 is pushed out and the fastening between the rotary cylinder 36 and the fixed shaft 28 is released.
When 8 is rotated in the winding direction, it is tightened to fasten the rotary cylinder 36 and the fixed shaft 28. The ball 42 is fitted in the hole 40 of the rotary cylinder 36 so as to be movable in the radial direction, and is relatively movable along the outer peripheral surface of the pulley 30. The pipe receiver 44 has a cylindrical shape with a bottom, and is fitted to the outer diameter portion of the cylindrical portion 37 of the rotary cylinder 36 so as to be relatively rotatable. A flange 46 is formed at the open end of the pipe receiver 44, and the pipe receiver 44 rotates integrally from one end of the take-up pipe 16 to the position where the flange 46 contacts the end of the take-up pipe 16. It is embedded in. On the inner peripheral surface of the tubular portion 48 of the pipe receiver 44, as shown in FIG. 3, six step portions 5 projecting in the radial direction at equal intervals in the circumferential direction.
0 is formed.

Next, the operation of this embodiment will be described.
When lowering the screen 18 in the stopped state as shown in FIG. 3, first, the operation chain 22 shown in FIG.
The lower operation side 22a of is pulled downward. As a result, the pulley 30 rotates clockwise in FIG. 3, so that the protrusion 35 of the pulley 30 moves from the position shown in FIG. 4 to the position shown in FIG. Touch the edge,
The pulley 30 and the rotary cylinder 36 are connected so as to be integrally rotatable in the clockwise direction in FIG. As a result, a rotational force in the clockwise direction in FIG. 6 is applied from the pulley 30 to the rotary cylinder 36, so that the one-way clutch spring 38 is expanded and the fastening between the rotary cylinder 36 and the fixed shaft 28 is released, and the rotary cylinder 36 is rotated. The rotation of the cylinder 36 is allowed. As a result, the pulley 30 can be continuously rotated clockwise in FIG. On the other hand, as shown in FIG. 3, the ball 42 located in the groove portion 34 of the pulley 30 has an outer peripheral surface formed by the inclined surface of the groove portion 34 of the extension portion 32 while the pulley 30 is rotating relative to the rotating cylinder 36. It is pushed up toward and moves the hole 40 of the rotary cylinder 36 toward the outer diameter portion. Next, when the rotary cylinder 36 is connected to the pulley 30 and rotates integrally, the balls 42 rotate clockwise together with the rotary cylinder 36 in FIG. 3, and as shown in FIG. Contact the part 50. As a result, the rotary cylinder 36 and the pipe receiver 44 are integrally rotatably connected, so that the rotation of the pulley 30 can be transmitted to the winding pipe 16, and the winding pipe 16 unwinds the screen 18.

Next, when the screen 18 is stopped during the lowering or at the lowering end, the operation of the lowering operation side 22a is stopped and the rotation of the pulley 30 is stopped. As a result, the winding pipe 16 tends to rotate in the winding direction of the screen 18 (that is, the counterclockwise direction in FIG. 5) together with the pipe receiver 44 by the elastic force of the winding spring.
Further, since the ball 42 is in contact with the step portion 50 of the pipe receiver 44, the rotary cylinder 36 also tries to rotate together with the pipe receiver 44, but a rotational force in the winding direction of the screen 18 is applied to the rotary cylinder 36. Therefore, the one-way clutch spring 38 is tightened, and the rotary cylinder 36 and the fixed shaft 28 are fastened, so that the rotation of the rotary cylinder 36 is restricted. As a result, the rotation of the pipe receiver 44 is also restrained, so that the rotation of the winding pipe 16 is stopped in the state shown in FIGS. 5 and 6.

Next, when the screen 18 is raised, the raising operation side 22b is slightly pulled downward from the stopped state shown in FIG. 5, and the pulley 30 is slightly rotated counterclockwise in FIG. The groove 34 of the pulley 30 is attached to the rotary cylinder 36.
The hole 40 is moved to a position facing the hole 40. This allows
The balls 42 pushed out by the pulley 30 toward the outer diameter of the rotary cylinder 36 move toward the inner diameter of the rotary cylinder 36 and are inserted into the groove 34 as shown in FIG. And the pipe receiver 44 are disconnected. Therefore, the pipe receiver 44 is rotatable,
Even if the pulling down of the raising operation side 22b is stopped and the hand is released, the winding pipe 16 rotates in the counterclockwise direction in FIG. 3 by the elastic force of the winding spring to wind up the screen 18. At this time, the protrusion 35 of the pulley 30
As shown in FIG. 4, the pulley 30 and the rotary cylinder 36 are moved to a relative rotatable position.

Next, when the screen 18 is stopped while rising, the lowering operation side 22a is slightly pulled downward, and the pulley 30 is slightly rotated clockwise in FIG. As a result, the pulley 30 and the rotary cylinder 36 rotate relative to each other, so that the ball 42 located in the groove portion 34 of the pulley 30 is pushed up toward the outer peripheral surface by the inclined surface of the groove portion 34 of the extension portion 32 and is rotated. The hole 40 of the pipe is moved in the direction of the outer diameter, and as shown in FIG.
4 is located at a position where it can come into contact with the step portion 50. On the other hand, since the pipe receiver 44 rotates counterclockwise in FIG. 5, the stepped portion 50 of the pipe receiver 44 contacts the ball 42, and the pipe receiver 44 and the rotary cylinder 36 are connected so as to be integrally rotatable. It As a result, the screen 18 is
Since the rotational force in the winding direction is applied, the one-way clutch spring 38 is closed and the rotary cylinder 36 is fastened to the fixed shaft 28. This restrains the rotation of the rotary cylinder 36,
The pipe receiver 44 also becomes unrotatable, and the rotation of the winding pipe 16 is stopped.

[0013]

According to the present invention, the pulley can be continuously rotated by continuously pulling the screen descending operation side of the operation cord. Therefore, the winding pipe can be continuously rotated to rotate the screen. Can be continuously lowered. Also, by slightly pulling down the screen raising operation side of the operation code, the pulley and the rotary cylinder can be relatively rotated, and the connection between the rotary cylinder and the pipe receiver can be released. Even when the hand is stopped and the hand is released, the wind-up pipe can be rotated in the screen-winding direction by the elastic force of the wind-up spring and the screen can be continuously raised. The screen can be stopped during the descent and at the descent end by simply releasing the hand from the operation code.To stop during the screen ascent, pull the screen descent operation side of the operation code down slightly This can be performed by relatively rotating the rotary cylinder and the rotary cylinder, and connecting the rotary cylinder and the pipe receiver to make the winding pipe non-rotatable. As a result, the screen can be raised and lowered and stopped by an easy operation. Further, the transmission of the rotation from the pulley to the winding pipe and the transmission of the elastic force from the winding spring are performed by relatively rotating the pulley and the rotary cylinder,
This is performed by moving the engagement member to connect and disconnect the rotary cylinder and the pipe receiver. Therefore, it is possible to provide a clutch device having a very simple structure with a small number of parts. As a result, since the manufacturing work is simple, the productivity can be improved and the price can be reduced.

[Brief description of drawings]

FIG. 1 is an overall view of a roll screen device embodying the present invention.

FIG. 2 is a cross-sectional view near the left end of FIG.

3 is a sectional view taken along line 3-3 of FIG.

4 is a sectional view taken along line 4-4 of FIG.

FIG. 5 is a diagram showing a state of the screen winding portion of FIG. 3;

FIG. 6 is a diagram showing a state when the screen of FIG. 4 is wound.

[Explanation of symbols]

 12 set frame 14 side plate 16 winding pipe 18 screen 22 operation chain (operation code) 28 fixed shaft 30 pulley 36 rotary cylinder 38 one-way clutch spring 42 ball (engagement member) 44 pipe receiver

Claims (1)

[Claims] 1. Both ends of a winding pipe (16) are rotatably supported by side plates (14) at both ends of a set frame (12), and the winding pipe (16) includes a screen (18). The one end side is connected so that it can be wound and unwound, and a winding spring that constantly applies a rotating force to the screen (18) in the winding direction is provided on the winding pipe (16). A roll screen device provided with a clutch device (29) capable of transmitting the rotation of a pulley (30) operable by an operation cord (22) and capable of exerting an elastic force of a winding spring. The clutch device (29) is rotatably supported by a fixed shaft (28) fixed to the side plate (14) in a non-rotatable manner. And a pipe receiver (44) that is integrally rotatably connected to the winding pipe (16), the pulley (30) that is relatively rotatably fitted to a fixed shaft (28), and a pulley ( 30) is rotatable by a predetermined angle and can be connected to rotate integrally with the rotary cylinder (36), and the relative rotation of the pulley (30) and the rotary cylinder (36),
An engaging member (42) capable of connecting and disconnecting the rotary cylinder (36) and the pipe receiver (44); and a fixed shaft (28) for fixing the rotary cylinder (36) in a rotational direction thereof.
One-way clutch spring (3
8) and, The roll screen apparatus characterized by having.