JP3252056B2 - Roll screen - 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.

[0002]

2. Description of the Related Art As conventional roll screen winding upper limit position setting apparatuses, there are those disclosed in Japanese Utility Model Publication No. 58-21919 and Japanese Utility Model Publication No. 3-16400.
That is, the screen winding upper limit position setting device disclosed in Japanese Utility Model Publication No. 58-21919 includes a stationary bolt arranged and fixed on the rotation axis of a screen winding cylinder.
A moving piece that is engaged with the stationary bolt and is connected to the take-up cylinder and that is movable and rotatable in the axial direction of the stationary bolt, a brake plate attached to the stationary bolt and pressed against the moving piece, and a stationary bolt And a pressure contact body which is disposed so as to overlap with the brake plate on the axis of, and which presses the brake plate in the moving frame direction by elastic force and presses against it. First, set the screen winding upper limit position.
By removing the rotating cylinder from the bracket, rotating the moving piece with fingers or the like, moving it on the stationary bolt, pressing it fully against the braking plate, and mounting it in the rotating cylinder of the screen wound up to the desired position Done. Thus, when the screen that has been pulled down is wound up to a desired position, the moving piece that has moved on the stationary bolt collides with the brake plate. For this reason, the brake plate moves against the elastic force of the press-contacting body by being pressed by the moving piece that is to move further on the stationary bolt. As a result, the pressure contact body is compressed, and the elastic force of the pressure contact body causes the brake plate to press the moving piece in the opposite direction to stop the movement of the moving piece. Therefore, the rotation of the winding cylinder stops, and the winding of the screen stops. A screen winding upper limit position setting device disclosed in Japanese Utility Model Publication No. 3-16400 discloses a fixed shaft for rotatably supporting a roll pipe, a bolt provided on an extension shaft portion of the fixed shaft, and a nut attached to the bolt. A moving drum that is mounted as a roll and moves on a bolt by rotating with a roll pipe, and a brake that brakes the moving drum, wherein the brake is a brake drum provided on an extension of a fixed shaft, and a brake drum. A coil spring, which is freely rotatable around one end and one end of which is locked to the extension shaft portion of the fixed shaft and the other end of which is free, and an engaging portion provided on the coil spring side of the moving frame. The joint is engaged with the other end of the coil spring to fasten the coil spring to the brake drum, thereby stopping the rotation of the roll pipe. To set the winding upper limit of the screen, first remove the roll pipe from the bracket,
In a state where the moving frame is moved to a position where the engaging portion of the moving frame is engaged with the other end of the coil spring and the coil spring is fixed to the brake drum, the screen is wound up to a desired position on the roll pipe. It is done by attaching. Thus, even when the roll pipe rotates rapidly and the moving top moves while rapidly rotating on the bolts, when the screen is wound up to the desired position and stopped, the moving top is shocked by the coil spring. Can be absorbed and stopped.

[0003]

However, the conventional screen winding upper limit position setting device has the following problems. In other words, in Japanese Unexamined Utility Model Publication No. 58-21919, when the moving piece is moved to the winding upper limit position, the impact force is slightly absorbed by the elastic force of the press contact body, but the moving piece suddenly absorbs the impact force. Since the braking force is applied, a considerably large impact force is generated. For this reason, there is a problem that the moving piece is firmly connected to the thread of the stationary bolt, and the lowering operation becomes heavy when the screen is lowered from the winding upper limit position.
In addition, Japanese Utility Model Publication No. 3-16400 discloses
The moving frame is frictionally engaged with the inner surface of the coil spring to absorb the impact force, but when the impact force is particularly large, the moving frame is inserted into the inner diameter portion of the coil spring while pushing and expanding the coil spring by its conical surface. To go. For this reason, there is a problem that the coil spring gets over the maximum diameter portion of the conical surface of the moving top and firmly fastens the moving top, so that when the screen is lowered from the winding upper limit position, the lowering operation becomes heavy. . The present invention has been made to solve the above problems.

[0004]

According to the present invention, the nut member has a magnet, and the regulating member is formed of a magnet. The magnet of the nut member and the magnet of the regulating member have the same facing side. The above problem is solved by arranging the poles. That is, the roll screen of the present invention includes a winding pipe (16) whose both ends are rotatably supported by side plates (14) provided at both ends of the set frame (12), and one end of the winding pipe (16). A screen (18) connected so as to be able to be wound and unwound, a winding spring for constantly applying a force to the winding pipe (16) to rotate the screen (18) in a winding direction, and a winding pipe (16). To the screen (1)
8) a winding upper limit position setting device capable of setting a winding upper limit position, wherein the winding upper limit position setting device is a bolt shaft arranged concentrically with the winding pipe (16). (52) and a nut member (54) having a magnet (70), which is axially movably engaged with the bolt shaft (52) and is connected to the winding pipe (16) so as to rotate integrally therewith. ) And a restricting member (56) formed of a magnet capable of restricting movement of the nut member (54) in the axial direction of the bolt shaft (52). The magnet (70) and the magnet of the regulating member (56) are arranged so that the sides facing each other have the same polarity. The magnet (7) is provided in the screw hole forming portion of the nut member (54).
0) may not be formed. Further, one or both of the magnet (70) of the nut member (54) and the magnet of the regulating member (56) may be an electromagnet. The sign in parentheses is
2 shows corresponding members of an embodiment described later.

[0005]

When the screen is lifted, the take-up pipe rotates in the screen take-up direction due to the elastic force of the take-up spring, and the nut member also rotates integrally with the take-up pipe and moves on the bolt shaft toward the regulating member. To go. At this time, as the nut member moves on the bolt axis in the direction of the regulating member, the repulsive force between the magnet of the nut member and the magnet of the regulating member increases, so that the braking force of the nut member gradually increases, The speed at which the member moves on the bolt axis gradually decreases. As a result, when the nut member moves to the position closest to the regulating member, the braking force of the nut member is the strongest. Therefore, a slight clearance is formed between the nut member and the regulating member due to the repulsive force between the nut member magnet and the regulating member magnet. Is stopped in the state in which is formed, and further rotation is restrained. Therefore, the rotation of the winding pipe is restricted. As a result, the lifting of the screen stops at the set position. In this manner, the nut member gradually increases its braking force as it approaches the regulating member, and the braking force is greatest at a position where the nut and the regulating member are closest to each other. Can be stopped in a state where a slight gap is formed between the restriction member and the regulating member.
Thus, it is possible to prevent the nut member from being firmly coupled to the thread of the bolt shaft. Further, when the nut member has a structure in which no magnet is formed in the screw hole forming portion, the strength of the screw hole can be increased as compared with a case where the magnet is subjected to screw hole processing. Further, when one or both of the magnet of the nut member and the magnet of the regulating member are electromagnets, the degree of freedom in setting the magnitude of the repulsive force can be increased.

[0006]

FIG. 1 shows a roll screen 1 embodying the present invention.
Indicates a part of 0. Side plates 1 are provided at both ends of a set frame 12 for attaching a roll screen 10 to a window frame.
4 (the side plate at the right end in FIG. 1 is not shown). A winding pipe 16 is rotatably supported by the side plate 14. Winding pipe 16
As shown in FIG. 3, one end of a screen 18 is connected by a screen stopper plate 17 so as to be wound and unwound. 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. As shown in FIG. 6, a pull cord 72 hangs down from the longitudinal center of the weight bar 20, and a knob 74 is connected to a lower end of the pull cord 72. A clutch cap 22 is provided on the side plate 14 at the left end in FIG.
It is fixed to the opening end portion by a connecting portion 22d formed to protrude in the outer diameter direction. Clutch cap 22
A cylindrical large-diameter portion 22a formed from the opening end of the connecting portion 22d side to a predetermined position in the axial direction;
A cylindrical small-diameter portion 22b having a smaller diameter dimension than the radial direction, a side wall 22c connecting the large-diameter portion 22a and the small-diameter portion 22b,
It is composed of Connection part 2 of clutch cap 22
2d, notches 22e are formed at intervals of 90 degrees in the circumferential direction, as shown in FIG. One end of the substantially cylindrical drum receiving plate 26 has a circumferential direction of 90 mm.
A protruding piece 26a is formed every time. The protruding piece 26 a of the drum receiving plate 26 is immovably fitted into the notch 22 e of the clutch cap 22. The drum receiving plate 26 is formed such that the other end of which the edge is bent in the radial direction protrudes from the left end surface of the side plate 14 in FIG. 1 to form a circular space 14 a formed in the side plate 14. Are fitted. Clutch cap 2
2, a clutch drum 28 is arranged. The clutch drum 28 includes a tip diameter portion 28f and a tip diameter portion 28f.
a large diameter portion 28a having a diameter larger than the tip diameter portion 28f and a shoulder portion 28d formed from the large diameter portion 28a. The middle diameter portion 28b having a smaller diameter than the middle diameter portion 28b and the shoulder portion 28
e, and a small-diameter portion 28c having a smaller diameter than the middle-diameter portion 28b is formed. The clutch drum 28 is rotatably fitted to the edge on the other end side of the drum receiving plate 26 with its tip diameter portion 28f. The clutch drum 28 is formed with a through hole 28h having a partly rectangular cross section and a partly circular cross section penetrating the shaft center thereof.
The through-hole 28h has a circular cross-section located on the side plate 14 side. As shown in FIG. 2, a notch 28i is formed at a predetermined position in the circumferential direction of the clutch drum 28 from its tip diameter portion 28f to its small diameter portion 28c.
Are formed. The clutch drum 28 has a medium diameter portion 28b disposed at the same axial position as the large diameter portion 22a of the clutch cap 22, and a small diameter portion 28b.
c is rotatably fitted to the small diameter portion 22b of the clutch cap 22. Also, the clutch drum 28
This means that the shoulder 28 e of the
2c, the rightward movement in FIG. 1 is restricted, and the shoulder 28g contacts the drum receiving plate 26, so that the leftward movement in FIG. 1 is restricted. A clutch spring 32 is provided between the large diameter portion 22a of the clutch cap 22 and the middle diameter portion 28b of the clutch drum 28. As shown in FIG. 2, both ends 32 a and 32 b of the clutch spring 32 are bent in the inner diameter direction, and are disposed in the cutout portions 28 i of the clutch drum 28. The clutch spring 32 is connected to the shoulder 2 of the clutch drum 28.
8d and the side wall 22c of the clutch cap 22, the movement in the axial direction is restricted. The clutch spring 32 can be fastened to and released from the inner peripheral surface of the clutch cap 22. Through hole 28h of clutch drum 28
One end 34 of the square cross section of the main shaft 34
a is fitted together so as to be able to rotate integrally therewith and not to be relatively movable in the axial direction. A stopper device 38 is provided on a circular section of the main shaft 34. The stopper device 38 includes a grooved drum 40 and a stopper case 42.
, A stopper case cap 44, a clutch spring 46, and a ball 48. The grooved drum 40 is rotatably fitted to the outer diameter portion of the main shaft 34, and a groove 40a for guiding the movement of the ball 48 is formed on the outer peripheral surface. The stopper case 42 is rotatably fitted to the outer diameter portion of the grooved drum 40 with the ball 48 interposed therebetween, and the outer diameter portion is fixed to the winding pipe 16 so as to rotate integrally therewith. . The grooved drum 40 and the stopper case 42 are connected so as to be integrally rotatable depending on the position of the ball 48 that is guided and moved by the groove 40a as they rotate relatively.
The connection is released. Stopper case cap 44
Is provided at one end of the stopper case 42 and connects the stopper case 42 to the main shaft 34 so as to be relatively rotatable. The clutch spring 46 has a grooved drum 40 at one end.
When the grooved drum 40 rotates in the unwinding direction of the screen 18, the grooved drum 40 is expanded to release the fastening between the grooved drum 40 and the main shaft 34. When the grooved drum 40 rotates in the winding direction of the screen 18, the grooved drum 40 and the main shaft 34 are fastened. One end of a bolt shaft 52 is coaxially connected to the other end of the main shaft 34 so as to be integrally rotatable therewith.
A regulating member 56 made of a magnet is fixed to the other end of the bolt shaft 52. The regulating member 56 includes a nut member 54 described later.
Movement can be regulated. A nut member 54 is attached to the bolt shaft 52 so that the bolt member 52 is moved in the axial direction by its rotation.
Are engaged. As shown in FIG. 3, the nut member 54 includes three protrusions 16a, 16b formed at predetermined intervals in the circumferential direction on the inner diameter of the winding pipe 16.
And 16c, and three grooves 54a, 54b and 54 formed in the outer diameter portion thereof at predetermined intervals in the circumferential direction.
and c are fitted together and connected so as to be integrally rotatable. A magnet 70 is attached to the nut member 54 so as to cover a portion other than the screw hole forming portion on the side facing the regulating member 56. The magnet 70 and the magnet of the regulating member 56 are arranged such that the sides facing each other have the same pole (for example, N poles). Through hole 2 of clutch drum 28
A spring controller 58 is detachably provided on the 8h side plate 14 side. As shown in FIG. 4, the spring controller 58 has protrusions 58a and 58b projecting in the outer diameter direction at symmetrical positions of the outer diameter portion. In the spring controller 58, a projection 58c having a circular cross section is formed at the axis thereof so as to protrude in the axial direction, and a projection 58d having a substantially fan-shaped cross section is provided at a predetermined radial distance from the projection 58c. Is the protrusion 5
8c and are formed so as to protrude in parallel with each other in the axial direction.
The protruding portion 58c can be relatively rotatably fitted to a circular cross section of the through hole 28h of the clutch drum 28. Further, the projection 58d can be inserted between the ends 32a and 32b of the clutch spring 32 so as to be relatively rotatable by a predetermined angle.
The clutch cap 22, the drum receiving plate 26,
Clutch drum 28, clutch spring 32, main shaft 34, bolt shaft 52, nut member 54, magnet 70, regulating member 56
And the spring controller 58 constitute a winding upper limit position setting device.

Next, a method of setting the winding upper limit position of the screen 18 will be described. First, in a state where the screen 18 is completely wound around the winding pipe 16, the projection 58 c of the spring controller 58 is inserted into the through hole 28 h of the clutch drum 28, and the projection 58 d is inserted into the end 3 of the clutch spring 32.
4a and 32b, respectively, and have projections 58a and 58b of the spring controller 58, which are rotated in the direction of the arrow in FIG. 4 (the direction of unwinding the screen 18). As a result, the projection 58d of the spring controller 58 rotates clockwise in FIG. 2 (in the direction of the arrow in FIG. 2) and comes into contact with the end 32a of the clutch spring 32.
Is pressed clockwise in FIG. Therefore, the clutch spring 32 is contracted, so that the clutch spring 32 and the clutch cap 22 are disengaged from each other, and the clutch spring 32 becomes rotatable. As a result, the end portion 32a of the clutch spring 32 is pressed by the projection 58d, and
8 contacts the end of the notch 28i of the clutch spring 3
2. The clutch drum 28 and the main shaft 34 rotate integrally. For this reason, the bolt shaft 52 rotates integrally with the main shaft 34, but the winding pipe 16 is rotated by the elastic force of the winding spring.
Does not rotate in the unwinding direction of the screen 18, so that the rotation of the nut member 54 is restricted. As a result, the nut member 54 is rotated by the bolt shaft 52 so that the magnet 70
The bolt shaft 52 against the repulsive force of the
Is moved in the direction of the regulating member 56 on the axis of the. The repulsive force between the magnet 70 of the nut member 54 and the magnet of the regulating member 56 increases as the nut member 54 approaches the regulating member 56.
Therefore, when the nut member 54 moves to the position closest to the regulating member 56, as shown in FIG. 5, the regulating member 5 is repelled by the magnet 70 and the magnet of the regulating member 56.
6 is stopped in a state where a slight gap is formed between the bolt shaft 52 and the bolt shaft 52.
And begin to rotate together. For this reason, since the winding pipe 16 starts rotating integrally with the nut member 54 overcoming the elastic force of the winding spring, the screen 18 is unwound. The screen 18 is lowered to the position shown in FIG.
Remove from As a result, the winding pipe 16 tends to rotate in the winding direction of the screen 18 due to the elastic force of the winding spring, so that the nut member 54 also rotates in the winding direction of the screen 18. However, the nut member 54
Fig. 1 shows that when this rotates in the winding direction of the screen 18,
Although it moves in the middle right direction, it has already moved to the position closest to the regulating member 56, and the clutch spring 32 is no longer pressed by the projection 58d of the spring controller 58, so that it expands and The rotation of the clutch drum 28, the main shaft 34, and the bolt shaft 52 is restrained, so that the nut member 5
4 cannot rotate. For this reason, the winding pipe 1
6 is also restrained. Thereby, the winding upper limit position of the screen 18 is set to the position shown in FIG.
In this manner, the screen 18 can be simply moved by inserting the spring controller 58 into the clutch drum 28 and rotating it.
The winding upper limit position of the screen 18 can be easily set. Also, fine adjustment of the set position can be easily performed. In the above-described embodiment, the winding upper limit position of the screen 18 is set to the position shown in FIG. 6, but is not limited thereto, and can be set to a desired position.

When the screen 18 is to be lowered after the winding upper limit position of the screen 18 has been set, the user holds the knob 74 and pulls it down. Thereby, the pull cord 72
, The weight bar 20 is pulled down, so that the winding pipe 16 rotates counterclockwise in FIG. 4 (the direction of the arrow in FIG. 4). Thereby, the winding pipe 16 rotates the nut member 54 clockwise in FIG. 3 and also rotates the stopper case 42 clockwise in FIG. By the rotation of the stopper case 42, the stopper case 42 and the grooved drum 40 are fastened via the ball 48, and the grooved drum 40 also rotates in the direction of unwinding the screen 18, but the grooved drum 40 unwinds the screen 18. Rotating in the direction
The clutch spring 46 is pushed out to expand the grooved drum 4.
Since the connection between 0 and the main shaft 34 is released, the main shaft 34 does not rotate. Therefore, the bolt shaft 52 does not rotate,
The nut member 54 rotates the bolt shaft 5
2 moves leftward in FIG. Thereby, the screen 18 is unwound from the winding pipe 16. After lowering the screen 18 to the lowest position shown in FIG. 7 and then releasing the force pulling the weight bar 20 downward,
The winding pipe 16 tends to rotate in the winding direction of the screen 18 by the elastic force of the winding spring. For this reason,
Since a rotational force in the winding direction of the screen 18 is applied to the grooved drum 40 via the stopper case 42, the clutch spring 46 is tightened, and the grooved drum 40 and the main shaft 34 are fastened. As a result, the main shaft 34 rotates counterclockwise in FIG. 2, and the clutch drum 28 also rotates counterclockwise in FIG. 2. However, after the clutch drum 28 rotates a predetermined angle, the end of the notch 28 i The end portion 32a contacts the end portion 32a of the clutch spring 32 and presses the end portion 32a counterclockwise in FIG. Since the pressing force applied to the clutch spring 32 is a force in a direction in which the clutch spring 32 is expanded and fastened to the clutch cap 22, the rotation of the clutch drum 28 is performed by the clutch spring 32 fastened to the clutch cap 22. Be bound. As a result, the rotation of the main shaft 34 is also restricted.
The rotation of the winding pipe 16 is restricted via the stopper case 42. As a result, the screen 18 stops. In the above embodiment, the case where the screen 18 is lowered to the lowest position is described. However, when the screen 18 is lowered to a desired position, the screen 18 stops in the same manner as described above.

Next, when the screen 18 is raised, the user holds the knob 74 and pulls it down slightly.
As a result, the weight bar 20 is pulled through the pull cord 72.
Is slightly lowered downward, so that the stopper case 42 rotates slightly in the unwinding direction of the screen 18 together with the winding pipe 16. As a result, the ball 48 is guided by the groove 50 and moves, and the stopper case 42 and the grooved drum 40 are moved.
Is released. For this reason, the winding pipe 16 and the stopper case 42 rotate counterclockwise in FIG. 3 by the elastic force of the winding spring. On the other hand, since the rotation of the clutch drum 28 is restricted by the clutch spring 32 fastened to the clutch cap 22 as described above, the rotation of the main shaft 34 is restricted. As a result, since the rotation of the bolt shaft 52 is also restricted, the nut member 54 that rotates integrally with the winding pipe 16 is
The bolt shaft 52 against the repulsive force of the
The upper part moves rightward in FIG. At this time, the repulsive force between the magnet 70 and the magnet of the regulating member 56 increases as the nut member 54 moves rightward in FIG. 1 on the bolt shaft 52, so that the braking force of the nut member 54 gradually decreases. The speed at which the nut member 54 moves on the bolt shaft 52 gradually decreases. As a result, as shown in FIG. 5, when the nut member 54 moves to the position closest to the regulating member 56, the braking force of the nut member 54 is the strongest, so the repulsive force between the magnet 70 and the magnet of the regulating member 56 causes It stops with a slight gap formed with the regulating member 56, and further rotation is restrained. Therefore, the rotation of the winding pipe 16 is restricted. Thus, the lifting of the screen 18 stops at the position shown in FIG. The position where the screen 18 stops is the winding upper limit position of the screen 18 set previously. As described above, the nut member 54 gradually increases its braking force as it approaches the regulating member 56, and the braking force is greatest at the position where the nut and the regulating member 56 are closest to each other. Due to the repulsive force between the control member 56 and the magnet of the control member 56, the stop can be performed in a state where a slight gap is formed between the control member 56 and the control member 56. This prevents the nut member 54 from being firmly connected to the thread of the bolt shaft 52.

It is to be noted that a ring-shaped magnet is mounted on a nut member of an existing roll screen winding upper limit position setting device, a regulating member is formed by a magnet, and both magnets are arranged so that opposite sides have the same polarity. Good, existing roll screens can be very easily changed to the specifications of the present application.

In the above embodiment, the magnet 70 of the nut member 54 and the magnet of the regulating member 56 are arranged such that their facing sides are N poles. However, the present invention is not limited to this. The poles may be used. In the above-described embodiment, the magnet 70 is provided in a portion other than the screw hole forming portion of the nut member 54.
The reason for this is to increase the strength of the screw hole because the screw hole tends to become brittle when the magnet material is subjected to screw hole processing. However, if it is not necessary to consider the strength of the screw hole, the whole nut member may be formed by a magnet. Further, the magnet 70 of the nut member 54
Either or both of the magnets of the regulating member 56 may be electromagnets.

[0012]

According to the present invention, the nut member has a magnet and the regulating member is formed of a magnet, and the magnet of the nut member and the magnet of the regulating member have the same polarity on their facing sides. So that When the screen is raised, the take-up pipe rotates in the screen take-up direction due to the elastic force of the take-up spring, and the nut member also rotates integrally with the take-up pipe and moves on the bolt shaft toward the regulating member. However, as the nut member approaches the regulating member, the repulsive force between the magnet of the nut member and the magnet of the regulating member increases (that is, the braking force of the nut member gradually increases). The speed of moving on the bolt axis gradually decreases. Therefore, when the nut member moves to the position closest to the regulating member,
Since the braking force is the strongest, a slight gap can be formed between the nut and the regulating member due to the repulsive force of the magnet of the nut member and the magnet of the regulating member to stop. This allows
Since it is possible to prevent the nut member from being firmly connected to the thread of the bolt shaft, the screen can be easily moved down from the winding upper limit position.

[Brief description of the drawings]

FIG. 1 is a partial cross-sectional view of a roll screen embodying the present invention.

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

FIG. 3 is a sectional view taken along line 3-3 in FIG. 1;

FIG. 4 is a side view of a roll screen.

FIG. 5 is a diagram illustrating a state in which the nut member and the regulating member are closest to each other.

FIG. 6 is a view showing a state where the screen is wound up to a winding upper limit position.

FIG. 7 is a diagram showing a state where the screen is unwound to a lowermost position.

[Explanation of symbols]

 12 Set frame 14 Side plate 16 Winding pipe 18 Screen 52 Bolt shaft 54 Nut member 56 Restriction member 70 Magnet

Claims (3)

(57) [Claims] 1. A winding pipe (16) whose both ends are rotatably supported by side plates (14) provided at both ends of a set frame (12), and one end of the winding pipe (16) is wound and wound. A screen (18) releasably connected, a winding spring for constantly applying a force to rotate the screen (18) in the winding direction to the winding pipe (16), and a screen to the winding pipe (16) (18) a winding upper limit position setting device capable of setting the winding upper limit position, wherein the winding upper limit position setting device is arranged concentrically with the winding pipe (16). A bolt shaft (52) is axially movably engaged with the bolt shaft (52), and is connected to the winding pipe (16) so as to rotate integrally therewith. 0), and a regulating member (56) formed of a magnet, which can regulate movement of the nut member (54) in the axial direction of the bolt shaft (52). The magnet (70) of the nut member (54) and the regulating member (56)
Wherein the magnets are arranged such that sides facing each other have the same polarity. 2. The roll screen according to claim 1, wherein the magnet (70) is not formed in the screw hole forming portion of the nut member (54). 3. The magnet (7) of the nut member (54).
3. The roll screen according to claim 1, wherein one or both of the magnets of the regulation member and the regulation member are electromagnets. 4.