JP3155122B2 - Roll screen device - Google Patents

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 Conventional roll screen devices include:
There is one disclosed in JP-A-4-80493. The roll screen device shown in the figure is provided with an urging means for applying an urging force in a screen lifting direction to a winding shaft for suspending and supporting the screen, and rotates the pulley based on a screen lowering operation of an operation code. A clutch device is provided that transmits the force to the winding shaft and rotates the winding shaft in the screen ascending direction by the urging force of the urging means based on the operation of lowering the operation code after the lowering operation. The clutch device is provided in the clutch case, which is supported by the 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. A first clutch drum rotatably supported by an intermediate portion of the support shaft; a coil spring having one end supported by the clutch case and the other end supported by the first clutch drum; and a coil spring provided around the base of the first clutch drum. A second clutch 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 groove formed on the distal end of the second clutch drum. A clutch ball movably provided between the guide groove and the guide groove by rotation of the clutch case; a brake drum rotatably supported at an intermediate portion of the support shaft; A brake carrier rotatably supported on the inside of the brake drum and having a front end connectable to the first clutch drum and a middle part of the support shaft, one end of which is supported by the brake carrier and the other end of which is supported by the first clutch drum; The stop ring, the brake spring fitted on the inner peripheral surface of the brake drum, the coil spring provided on the outer peripheral surface of the brake drum, and the clutch case from the front end to the base end of the brake drum. An operation cap is rotatably supported at the tip end of the clutch case via an end, and has one end of a coil spring fixed thereto, and a winding shaft provided on an outer peripheral surface of the operation cap. When lowering the screen, rotate the pulley in the screen lowering direction.
At the same time, the clutch case rotates against the urging force of the coil spring, the clutch ball moves, and the rotation of the clutch case is transmitted to the first clutch drum via the clutch ball. It rotates around the spindle with the drum. Thereby, the first
Since the clutch drum presses and rotates the brake carrier, the brake spring also rotates integrally with the brake spring to expand its diameter, and the winding shaft rotates via the operation cap. When winding the screen,
The pulley is rotated in the screen descending direction, the clutch case is rotated against the urging force of the coil spring, the clutch ball is moved, and the rotation of the clutch case is transmitted to the second clutch drum via this. As a result, the end of the brake ring is pressed by the second clutch drum 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 further pressed while the other end is fixed to the brake carrier,
The diameter of the brake spring is reduced to reduce the frictional force with the brake drum, and the brake drum can rotate with respect to the brake spring. Therefore, the winding shaft is rotated by the accumulated force of the torsion coil spring, and the screen is wound up.

[0003]

However, in the above-mentioned conventional roll screen device, since the number of parts of the clutch device is large and the structure is complicated, the manufacturing operation is complicated, the productivity is low and the cost is high. There is. The present invention is to solve such a problem.

[0004]

SUMMARY OF THE INVENTION The present invention solves the above problem by connecting and disconnecting a pulley and a pipe receiver by moving a movable operation member guided by a cam groove of a cam. I do. That is, in the roll screen device of the present invention, both ends of the winding pipe (16) are rotatably supported on the side plates (14) at both ends of the set frame (12), and the screen is provided on the winding pipe (16). One end of (18) is connected so as to be able to be wound and unwound, and is connected to the screen (1) at all times.
8) A take-up spring that applies a force that rotates in the take-up direction is provided. The take-up pipe (16) can transmit the rotation of the pulley (42) to the take-up pipe (16). A clutch device (60) capable of exerting an elastic force is provided, wherein the clutch device (60) is provided.
A fixed shaft (28) non-rotatably attached to the side plate (14), a cam groove (48) supported on the inner peripheral side so as to be rotatable relative to the fixed shaft (28), and an outer diameter side. , A clutch spring (44) capable of engaging and disengaging the cam (46) to and from the fixed shaft in the direction of rotation thereof, and a fixed shaft (28).
And a pulley (42), which is rotatably supported by the shaft and is integrally rotatably connected to the take-up pipe (16), and is non-rotatable relative to the pulley (42) but is movable in the axial direction. And an operating member (56) capable of connecting and disconnecting the pipe receiver (36) to and from the pulley (42), and constantly pressing the operating member (56) toward the pipe receiver (36). A spring (54);
The cam (4) is provided so as to move integrally with the operation member (56), and is rotated by rotation of the operation member (56).
And (6) a movable member (50) that can be guided and moved by the cam groove (48).

[0005]

When the screen is raised, the pulley is rotated in the screen winding direction. As a result, the operating member rotates, and the moving member is guided by the cam groove of the cam and moves in the connection releasing direction, so that the operating member also moves and is disconnected from the pipe receiver. The state in which the connection between the operating member and the pipe receiver is released is continued by continuing to apply a force in the rotation direction to the extent that the pulley is not reversely rotated. As a result, the pipe receiver becomes rotatable, so that the winding pipe rotates by the elastic force of the winding spring and winds the screen. When the screen has been wound by the winding pipe or when the winding pipe is stopped during winding of the screen, the force applied to the pulley in the rotation direction is released. Thus, the operating member moves in the connecting direction by the elastic force of the spring and is connected to the pipe receiver. For this reason, since a rotational force in the screen winding direction is applied to the pulley, the rotational force is also transmitted to the cam via the moving member, and the cam presses in a direction to fasten the one-way clutch spring to the fixed shaft. The cam and the fixed shaft are fastened. As a result, the rotation of the winding pipe stops because the pipe receiver cannot rotate. When the screen is lowered, a rotating force is applied to the pulley from the stopped state of the winding pipe in the screen unwinding direction. Accordingly, the rotational force is also applied to the operation member, so that the rotational force is also transmitted to the cam via the moving member. For this reason, the cam presses the clutch spring in a direction in which the fastening with the fixed shaft is released, so that the fastening between the cam and the fixed shaft is released. This allows the pulley to rotate, so that the rotation of the pulley is transmitted to the pipe receiver, and the winding shaft unwinds the screen. As described above, the pulley and the pipe receiver are connected by moving the operating member by the elastic force of the spring, and the operating member is moved via the moving member that moves the cam groove of the cam by the rotation of the pulley. Thus, connection and disconnection are performed.
Thus, it is possible to perform the operation with a clutch device having a small number of parts and an extremely simple structure.

[0006]

FIG. 1 shows an entire roll screen apparatus 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 by the side plate 14. One end of a screen 18 is connected to the winding pipe 16 by a screen stopper plate 19 so as to be wound and unwound (see FIG. 3). The winding pipe 16 is constantly applied with a force in the direction of winding the screen 18 by a winding spring (not shown). The other end of the screen 18 is connected to a weight bar 20. A wheel cover 24 is provided at the left end of the winding pipe 16 in FIG. 1, and an operation chain (operation code) 22 that can rotate and drive the winding pipe 16 is led out from the wheel cover 24. The operation chain 22 is an endless ball chain.

FIG. 2 is a sectional view of the left end in FIG. A cylindrical pipe receiver 36 with a bottom is integrally rotatably fitted in the inner diameter portion near the end of the winding pipe 16. A flange 40 is formed at the open end of the cylindrical portion 37 of the pipe receiver 36, and the flange 40 contacts the open end of the winding pipe 16 to move the pipe receiver 36 rightward in FIG. 2. Restrained. The other end of the fixed shaft 28 having a circular cross section, one end of which is non-rotatably connected to the side plate 14, is inserted into the bottom 39 of the pipe receiver 36 at the center of rotation thereof so as to be relatively rotatable. As shown in FIG. 4, three grooves 58 are formed on the inner side surface of the bottom portion 39 of the pipe receiver 36 at predetermined intervals in the circumferential direction. Fixed shaft 28
The shoulders are formed from the mounting side to the side plate 14 to the tip, and the radial dimension is reduced in four stages, and the inner surface of the bottom 39 of the pipe receiver 36 is formed on the shoulder 32. The contact is restricted from moving leftward in FIG. At the tip of the fixed shaft 28, a retaining pin 38 for restricting the movement of the fixed shaft 28 in the axial direction is provided so as to penetrate in the axial direction. A pulley 42 is fitted to the outer diameter of the fixed shaft 28 so as to be rotatable relative to the wheel cover 24 fixed to the side plate 14. A cylindrical portion 43 protrudes from the side of the pipe receiver 36 of the pulley 42 in the axial direction. The inner diameter of the cylindrical portion 37 of the pipe receiver 36 is rotatably fitted to the outer diameter of the cylindrical portion 43. An operation chain 22 that can rotate the pulley 42 is wound around the outer diameter of the pulley 42. The operation chain 22 is prevented from dropping from the pulley 42 by the wheel cover 24. A one-way clutch spring (clutch spring) 44 is provided adjacent to the pulley 42 so as to be relatively rotatable on the fixed shaft 28. At a position closer to the tip than the one-way clutch spring 44 of the fixed shaft 28, a cylindrical cam 46 with a bottom is interposed between the inner diameter of the cylindrical portion 47 and the fixed shaft 28 with the one-way clutch spring 44 interposed therebetween. It is fitted rotatably.
As shown in FIG. 3, an end 45 of a one-way clutch spring 44 is inserted into the cylindrical portion 47 of the cam 46 in the radial direction thereof. As a result, the one-way clutch spring 44
When the end 45 of the fixed shaft 2 is pressed by the cam 46 in the rotating direction for unwinding the screen 18, the fixed shaft 2 is expanded.
8, and thus can rotate integrally with the cam 46. When the end 45 of the one-way clutch spring 44 is pressed by the cam 46 in the rotating direction of winding the screen 18, the one-way clutch spring 44 is tightened and fastened to the fixed shaft 28. Relative rotation becomes impossible. A cam groove 48 shown in FIG.
Are formed. In the cam groove 48, a ball (moving member) 50 that is guided and movable by this is arranged.
In the outer diameter portion of the cam 46, an operating member 5 inserted in a notch portion 43 a formed at a predetermined position in the circumferential direction of the pulley 42 so as to be movable in the axial direction but not to rotate relatively.
6 are arranged. The operating member 56 is constantly pressed in the direction of the pipe receiver 36 by a spring 54 provided between the operating member 56 and the pulley 42, and the ball 50 is rotatably fitted in a hole 57 formed in the inner diameter of the operating member 56. I have. The ball 50 is movable by being guided by the cam groove 48 of the cam when the operation member 56 rotates.
By this movement, the operation member 56 also moves in the axial direction of the fixed shaft 28 and can be inserted into and removed from the groove 58 of the pipe receiver 36. When the operating member 56 is inserted into the groove 58, the pipe receiver 36 is integrally rotatably connected to the pulley 42, and when the operating member 56 is detached from the groove 58, the pipe receiver 36 is connected to the pulley 42. It is released. The pipe receiver 36, the one-way clutch spring 44,
The clutch device 60 is constituted by the cam 46, the cam groove 48, the ball 50, the spring 54, and the operation member 56. That is, the pipe receiver 36 has a function of supporting the winding pipe 16 and transmitting the rotation of the clutch device 60 to the winding pipe 16.

Next, the operation of this embodiment will be described.
When the operation side 22a of the operation chain 22 shown in FIG. 3 is pulled down, the pulley 42 rotates in the direction of unwinding the screen 18. Accordingly, the operation member 56 also rotates integrally with the pulley 42, so that the ball 50 is also guided by the cam groove 48 of the cam 46 and moves to the stop position A shown in FIG. At this time, since the rotation direction of the operation member 56 is the direction of the arrow shown in FIG. As a result, as shown in FIG. 5, the operating member 56 is inserted into the groove 58 of the pipe receiver 36, and the pulley 42 and the pipe receiver 36 are integrally rotatably connected. 42 can be transmitted. At the same time, since the cam 46 and the operating member 56 are integrally rotatably connected, the cam 46 rotates and presses the end 45 of the one-way clutch spring 44 in a direction to push and expand it. For this reason, the one-way clutch spring 44 becomes rotatable relative to the fixed shaft 28, so that the cam 46 rotates integrally with the pulley 42. As a result, the pulley 42 continues to rotate by continuously pulling the operation side 22 a downward, and the screen 18 is unwound from the winding pipe 16.

Next, when stopping the lowering of the screen 18, the operation of the operation side 22a is stopped, and the rotation of the pulley 42 is stopped. As a result, the winding pipe 16 tends to rotate in the direction in which the screen 18 is wound by the elastic force of the winding spring. Since the operating member 56 is inserted into the groove 58 of the pipe receiver 36, the force in the rotating direction is transmitted to the pulley 42 via the operating member 56 and to the cam 46 via the ball 50. Therefore, the cam 46 is connected to the end 45 of the one-way clutch spring 44.
Is pressed in the rotating direction of winding the screen 18, so that the one-way clutch spring 44 is fastened to the fixed shaft 28, so that the one-way clutch spring 44 cannot rotate relative to the fixed shaft 28. As a result, the operating member 56 attempts to rotate relative to the cam 46, but the ball 5
Since 0 moves from the stop position A shown in FIG. 6 to the stop position B shown in FIG. 7, rotation becomes impossible. For this reason,
Since the pipe receiver 36 connected to the operation member 56 also becomes non-rotatable, the winding pipe 16 becomes non-rotatable, and the screen 18 remains stopped at the lowered position.

Next, when raising the screen 18, the operation side 22a is pulled down, and the pulley 42 is rotated in the direction in which the screen 18 is unwound. As a result, the operation member 56 also rotates integrally with the pulley 42, so that the operation side 2
When the ball 2a is pulled down by a predetermined length, the ball 50 moves from the stop position B shown in FIG. 7 to the stop position C shown in FIG. For this reason, the operation member 56 moves leftward in FIG. 5 and separates from the groove 58 of the pipe receiver 36 as shown in FIG. Thereby, the pipe receiver 36 and the pulley 42
Is disconnected, the pipe receiver 36 becomes rotatable, and the winding pipe 16 rotates in the direction of winding the screen 18 by the elastic force of the winding spring. During this time,
By continuing to apply a downward pulling force to the operation side 22a to hold the pulley 42 at the above-described predetermined position, and continuing to apply a rotating force to the pulley 42 in the unwinding direction of the screen 18, the ball 50 is moved to the position shown in FIG. Stop position C shown in
And the connection between the pipe receiver 36 and the pulley 42 can be continuously released. As a result, the screen 18 is wound around the winding pipe 16.

Next, when stopping the screen 18 in the middle of ascent, release the hand from the operating side 22a and pull the pulley 4
The rotational force in the unwinding direction of the screen 18 applied to 2 is released. This makes it impossible for the operating member 56 to apply a force enough to stop the ball 50 at the stop position C shown in FIG. For this reason, the operating member 56 is moved in the direction of the pipe receiver 36 by the elastic force of the spring 54 and inserted into the groove 58, and the ball 50 is guided by the cam groove 48 so as to be moved from the stop position C shown in FIG. It moves to the stop position D shown in FIG. 9 and stops. As a result, the pulley 42 and the pipe receiver 36 are connected to each other, and the pulley 42 and the cam 46 are connected to each other so that they cannot rotate relative to each other. At this time, since the winding pipe 16 attempts to rotate in the winding direction of the screen 18 by the elastic force of the winding spring, the rotating force is transmitted to the pulley 42 via the operating member 56 and the ball 50 The power is transmitted to the cam 46. For this reason, the cam 46 presses the end 45 of the one-way clutch spring 44 in the rotation direction for winding the screen 18, so that the one-way clutch spring 44 is fastened to the fixed shaft 28, and the relative rotation with the fixed shaft 28 is not possible. Will be possible. This allows
Since the operation member 56 cannot rotate relative to the fixed shaft 28, the winding pipe 16 cannot rotate, and the screen 1
8 maintains the stopped state on the way. After the screen 18 is completely wound by the winding pipe 16, as in the case where the screen 18 is stopped halfway, the hand is released from the operation side 22 a and the operation member 56 is moved to the groove 58 of the pipe receiver 36. And the ball 50 is moved from the stop position C shown in FIG. 8 to the stop position D shown in FIG.
And stop it.

Next, when lowering the screen 18 from the state where the screen 18 is stopped in the middle of ascent and the state where the screen 18 is completely wound, the operation side 22a
Pull down. As a result, the pulley 42 is
The operation member 56 also rotates with the pulley 42 in order to rotate in the direction of unwinding 8. For this reason, the ball 50 is
6 and is moved from the stop position D shown in FIG. 9 to the stop position A shown in FIG. As a result, the operation member 56 further moves in the direction of the pipe receiver 36 and is further inserted into the groove 58 as shown in FIG. 5, and the screen 18 is unwound from the winding pipe 16 in the same manner as when the screen 18 is lowered. It will be descended.

[0013]

According to the present invention, the pulley and the pipe receiver are connected by moving the operating member by the elastic force of the spring, and the moving member moving the cam groove of the cam by the rotation of the pulley. The connection and the release of the connection are performed by moving the operation member through the connection. Therefore, it is possible to provide a clutch device having a very simple structure with a small number of parts. Thus, since the manufacturing operation is simple, the productivity can be improved and the price can be reduced.

[Brief description of the drawings]

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

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

FIG. 3 is a sectional view taken along line 3-3 in FIG. 2;

FIG. 4 is a sectional view taken along line 4-4 of FIG. 2;

FIG. 5 is a view showing a state in which an operation member is inserted into a groove of a pipe receiver.

FIG. 6 is a diagram showing a state where a ball is stopped at a stop position A of a cam groove of a cam.

FIG. 7 is a diagram showing a state where the ball is stopped at a stop position B of the cam groove of the cam.

FIG. 8 is a diagram showing a state where a ball is stopped at a stop position C of a cam groove of a cam.

FIG. 9 is a diagram showing a state where the ball is stopped at a stop position D of the cam groove of the cam.

[Explanation of symbols]

 12 set frame 14 side plate 16 take-up pipe 18 screen 28 fixed shaft 36 pipe receiver 42 pulley 44 one-way clutch spring (clutch spring) 46 cam 48 cam groove 50 ball (moving member) 54 spring 56 operating member 60 clutch device

Claims (1)

(57) [Claims] An end of a take-up pipe (16) is rotatably supported by side plates (14) at both ends of a set frame (12), and one end of a screen (18) is attached to the take-up pipe (16). The side is connected so as to be able to be wound and unwound, and is provided with a winding spring that constantly applies a force that rotates in the winding direction of the screen (18). A roll screen device is provided with a clutch device (60) capable of transmitting the rotation of the pulley (42) and acting on the elastic force of the take-up spring. A fixed shaft (28) non-rotatably mounted on the (14), a cam groove (48) on the inner peripheral side rotatably supported by the fixed shaft (28) and an outer peripheral side; A cam (46) formed with a shaft; a clutch spring (44) capable of fastening and releasing the cam (46) to and from a fixed shaft according to the rotation direction thereof; and a relative rotation to the fixed shaft (28). And a pipe receiver (36) supported on the take-up pipe (16) and rotatably connected to the take-up pipe (16), and connected to the pulley (42) so as to be relatively non-rotatable but movable in the axial direction. A pipe holder (36)
An operating member (56) capable of connecting and disconnecting the operating member to and from the pulley (42), a spring (54) for constantly pressing the operating member (56) in the direction of the pipe receiver (36), and an operating member (56). The cam (4) is provided so as to move integrally, and is rotated by rotation of the operation member (56).
And (6) a movable member (50) that can be guided and moved by the cam groove (48).