JP4666579B2 - Roll blind and winding member rotation restricting device - Google Patents

Description

  The present invention relates to a roll blind capable of pulling out a screen and fixing the screen at an arbitrary position, and further pulling out the screen being pulled out to release the fixing and winding the screen onto a winding roller. The present invention relates to a member rotation restricting device.

  2. Description of the Related Art Conventionally, various types of roll blind rotation restricting devices have been proposed.

For example, as disclosed in Patent Document 1, a brake shaft provided on a fixed shaft of a roll blind, a coiled brake spring that is externally fitted to the brake shaft so as to be fastened and loosened, A cylindrical cam that is axially slidable on the roll pipe and coaxially fitted to the outside of the brake spring, a cam groove provided on the peripheral surface of the cam, and a cam that engages with the cam groove The cam projection is provided integrally with the roll pipe, and the cam groove has a substantially Y-shaped outer contour extending in the circumferential direction and having an upper end and a lower end, and a center of the Y-shape. There is an inner contour located in the vicinity, at least the substantially Y-shaped lower end side of the cam groove has no bottom, one end of the brake spring is loosely fitted to the cam groove approximately Y-shaped lower end side, and the other end rotates integrally with the cam. When the roll pipe rotates in the screen winding direction, the cam projection reaches the lower end side of the substantially Y-shaped outer contour of the cam groove, pushes one end of the brake spring and rotates in the screen lowering direction. When reaching one of the upper ends of the substantially Y-shaped groove and pushing the other end of the brake spring together with the cam, the brake spring is pushed by the cam projection when the screen is rolled up, and when the other end is pushed when the screen is lowered. When the screen is pushed together with the cam, it relaxes and rotates with the cam, but when the screen is left after being lowered, the screen is fastened to the brake shaft and wound to push back the cam with its elastic force. The contour in the groove is such that when the cam is pushed back by the brake spring, the cam projection fits into it. There is configured a clutch device roller blind, characterized in that the substantially Y-shaped bifurcated upper end side is formed into a substantially V-shaped recessed.
Japanese Patent Publication 1-19032

  However, in the clutch device of Patent Document 1, the inside of the roll pipe has a multilayer structure. That is, in this clutch device, a brake spring is fitted on the brake shaft, and brake spring guides that guide both projecting ends of the brake spring are fitted independently. A cylindrical cam having a cam groove is attached to the outside of the brake spring guide, and a cam guide for sliding the cam in the axial direction is placed thereon. This cam guide rotates integrally with the roll pipe.

  Therefore, the conventional clutch device has a multilayer structure with the brake shaft, brake spring, brake spring guide, cylindrical cam, and cam guide existing in the roll pipe, so a considerable space is occupied in the roll pipe. As a result, the entire clutch device cannot be housed in a compact manner in the roll pipe, and the roll pipe inevitably has a large diameter.

  Therefore, the present invention was created in view of the conventional circumstances as described above, and a roll blind capable of compactly storing the entire clutch mechanism in the winding roller without taking up a large space in the winding roller. An object of the present invention is to provide a rotation regulating device for a winding member.

In the present invention, a fixed shaft that is non-rotatably attached to one bracket, and a screen winding device in which one end side is rotatably supported by the fixed shaft and the other end side is rotatably supported by the other bracket. A fixed shaft by a winding biasing force of the coil spring, and a coil spring having one end side locked to the fixed shaft and the other end locked to the winding roller and used as screen winding power In a roll blind that can be selected to allow or prevent the winding rotation of the winding roller relative to
A clutch spring having one end engaged with a clutch cam groove carved in a stator that is non-rotatably fitted to the fixed shaft ;
In the clutch cam groove, the drawn screen is locked at an arbitrary position, and the drawn screen is slightly pulled out to escape to the return path groove, and then guided to the clutch cam groove again to be unlocked and wound. It has a plurality of locking grooves so as to be wound around the take-up roller,
The clutch spring is provided with a rotation restricting device that is movable in the axial direction with respect to the fixed shaft and that can rotate integrally with the winding roller,
The rotation restricting device fixes a rotator in the winding roller, the rotator is rotatably supported by the stator, and the clutch spring is supported by the clutch holder so as not to move in the axial direction. The clutch holder and the rotator The above-described problems have been solved by providing engagement means that engages with each other so that they cannot be rotated relative to each other in the axial direction .

  The clutch cam groove guides the pulling groove that allows the clutch spring end to move over the entire circumference of the fixed shaft during the winding operation and the clutch spring end to the locking groove during the rewinding operation. And a locking groove that engages with the clutch spring end during the restriction operation, and a locking groove that induces the clutch spring end to return to the return path groove after the restriction operation is released. In this way, the above-mentioned problem has been solved.

  Further, the engaging means is constituted by a locking groove provided on the inner periphery of the rotator and a locking protrusion provided on the outer periphery of the clutch holder, and the end of the clutch spring is axially disposed in the clutch cam groove. The above-mentioned problem was solved by making it movable by the movable range.

In addition, a winding member capable of winding is attached to a winding roller, the winding roller is rotatably supported on a fixed shaft, and the winding roller is biased in a winding direction by a biasing means. In the winding roller, the winding operation by the biasing force of the biasing means, the rewinding operation based on the rotation of the winding roller, and the winding roller by the biasing means after the rewinding operation In the rotation restricting device for the winding member provided with the clutch device capable of selecting the restricting operation for preventing the rotation,
The clutch device includes a clutch cam groove carved in a stator that is non-rotatably fitted to the fixed shaft ,
A clutch holder that is axially movable and integrally rotatable with respect to the winding roller;
A rotator is fixed in the take-up roller, the rotator is rotatably supported by the stator, the clutch spring is supported so as not to move in the axial direction by a clutch holder, and the clutch holder and the rotator cannot be rotated relative to each other. And engaging means for movably engaging in the axial direction.
The clutch cam groove includes a pulling groove that allows movement of the clutch spring end during the winding operation, a pulling groove that guides the clutch spring end to the locking groove during the rewinding operation, and a restriction operation during the restricting operation. A locking groove that engages with the clutch spring end, and a locking groove that guides the clutch spring end to return to the return path groove after the restriction operation is released, and the clutch spring rewinds the clutch holder. It is possible to rotate relative to rotation in the direction and non-rotation relative to rotation in the winding direction of the clutch holder, and the clutch spring end can be guided in the clutch cam groove. Solved.

  Since the present invention is configured as described above, the entire clutch mechanism can be compactly accommodated in the take-up roller without taking up a large space in the take-up roller. As a result, the diameter of the winding roller is made extremely small, and an unprecedented extremely small roll blind and a rotation regulating device for the winding member are realized.

  The best mode for carrying out the present invention will be described below with reference to the drawings. As shown in FIGS. 1B and 1C, the rotation restricting device according to the present invention draws the screen P from the take-up roller 2 always urged in the take-up direction and takes up the take-up roller 2 at an arbitrary position. The roll blind 1 can be prevented from rotating in the winding direction, and the screen P that has been drawn out is further pulled out to prevent rotation in the winding direction, and the screen P can be wound around the winding roller 2. It has been.

  When the roll blind 1 is attached to the ceiling surface, for example, as shown in FIGS. 1A and 1B, the rail mounting bracket S is fixed to the ceiling surface with wood screws or the like, and the rail bar R is attached to the rail mounting bracket S. Engage.

  The roll blind 1 is attached to a corner of a wall surface or a mounting surface such as glass or sash by a pair of brackets Q. Specifically, as shown in FIG. 2, when the mounting surface is glass, sash, or the like, the male or female hook-and-loop fastener 20a is fixed to the mounting surface via a double-sided tape 21, The bracket Q is fixed through at least a pair of holders 16 having a rectangular plate shape slidably attached to the opening of the rail bar R. The holder 16 includes a base 16B to which the hook-and-loop fastener 20b can be attached, an engaging portion 16C protruding from the back surface of the base 16B, and a strap protrusion-like locking protrusion protruding from the lower side center of the base 16B. The contact portion 16D is formed.

  When the hook-and-loop fastener 20b of the holder 16 is joined to the hook-and-loop fastener 20a attached to the glass, the arrow A shown in FIG. 2 is applied to the rail bar R and the holder 16 by the weight of the screen P and the winding roller 2 and the force pulling the screen P. Since the torque in the direction acts, it acts so as to separate the joints of the hook-and-loop fasteners 20a and 20b, but this torque is received by the locking contact portion 16A by the contact between the locking contact portion 16A and the mounting surface. Therefore, peeling and detachment from the mounting surface of the holder 16 itself is prevented. In addition, the heat | fever reflecting plate 22 is attached to the opposite surface side of the glass surface corresponding to the double-sided tape 21, and the fall of the adhesive force by the excessive rise in temperature is prevented.

  Also, as shown in FIGS. 3 (a) and 3 (b) and FIGS. 4 (a) and 4 (b), the bracket Q is made extendable and retractable by a guide tube portion 25 for fine adjustment of the slide and a screwing adjustment portion 23, respectively. The tension bar 24 fixed to the mounting surface may be supported via bracket mounting members 28 fixed to the left and right ends. At this time, the left and right bracket attachment members 28 are pressed against the corners of the wall surface by the tension force of the tension bar 24. As shown in FIG. 3B, the bracket mounting member 28 includes mounting surfaces R1 and R2, and can be mounted on the front surface or the lower surface. Further, the projecting piece R3 prevents the bracket mounting member 28 from being inclined as shown in FIG.

  Furthermore, the tension bar 24 is configured by inserting a small-diameter pipe 24B into a large-diameter pipe 24A at one end opening side through a slide cylinder portion 25 for fine adjustment of slide so that the small-diameter pipe 24B can extend and slide freely. That is, the guide tube portion 25 has a holding pipe portion 25A fixed to one end so that the large diameter pipe 24A can be slidably inserted inward, and the guide tube portion 25 is formed on the outer periphery of the small diameter pipe 24B. A female screw groove is formed so as to be screwed into the male screw groove. Thus, the small-diameter pipe 24B is drawn out from the large-diameter pipe 24A according to the screw pitch when the guide cylinder portion 25 is rotated, and the tension bar 24 is stretched and fixed to the wall surface.

  Further, the screwing adjusting portion 23 temporarily holds the tension bar 24 on the wall surface in advance, and after the temporary fixing, the tension bar 24 is moved by rotating the guide cylinder portion 25 for fine adjustment of the slide. Forced to be fixed to the wall. The screwing adjustment portion 23 is fixed in a state where the large-diameter pipe 24A is inserted through the holding portion 26 having a substantially C-ring cross section at the opening end portion of the holding pipe portion 25A formed at one end of the guide tube portion 25, The clamping part 26 is pressed in the reduced diameter direction by screwing the tightening screw part 27 and is held in close contact with the large diameter pipe 24A.

  A hollow pipe-shaped take-up roller 2 is rotatably supported between a pair of brackets Q arranged on the roll blind 1. That is, one end of the take-up roller 2 is rotatably supported by a rectangular bar-shaped fixed shaft 3 fitted and fixed to one bracket Q in a state of being inserted into the take-up roller 2. The other end of the roller 2 is rotatably supported by the other bracket Q. A screen P is wound around the winding roller 2.

  As shown in FIGS. 5A and 5B, a coil spring 15 is disposed in the winding roller 2, and one end of the coil spring 15 is fixed to the fixed shaft 3, and the other end is wound. It is fixed to the roller 2. When the take-up roller 2 is rotated in the drawing direction of the screen P, the coil spring 15 is accumulated, and the take-up roller 2 is rotationally driven in the take-up direction of the screen P by this accumulated force. Yes.

  As shown in FIGS. 5A and 5B, one end of the coil spring 15 is fixed to the inner core 11, the inner core 11 is fixed to the fixed shaft 3 with a screw 37, and the other end of the coil spring 15 is fixed to the fixed shaft. 3 is fixed.

  As shown in FIG. 5A, a cylindrical rotator 4 that rotates coaxially with the winding roller 2 is fitted and fixed inside one end of the winding roller 2, and a stator 5 is placed inside the rotator 4. Is arranged. A prism portion 17 for fixing to the bracket Q is formed at one end of the stator 5, and a shaft fitting portion 18 is formed at the other end of the stator 5. The fixed shaft 3 is inserted into the fixed shaft 3. The stator 5 is non-rotatably fitted. Further, a bearing portion 19 is formed next to the prism portion 17, and the rotator 4 is rotatably supported by the bearing portion 19 of the stator 5 via a bearing.

  A first clutch holder 6 and a second clutch holder 7 that rotate together with the take-up roller 2 are disposed between the rotator 4 and the stator 5, and the stator 5 is interposed between the holders 6 and 7. A clutch spring 9 having one end engaged with the clutch cam groove 8 formed on the other end and a free end on the other end is inserted. One end side of the clutch spring 9 forms an engagement end 9 a that is bent toward the stator 5. If no circumferential force is applied to the engagement end 9a, the clutch spring 9 and the first clutch holder 6 rotate integrally and are movable in the axial direction. Further, the first clutch holder 6 is formed with a spring holding portion having a length substantially the same as the axial length of the clutch spring 9 by the inner peripheral surface of the flange 6b and the claw piece 7a.

  The first clutch holder 6 and the second clutch holder 7 are configured so that the claw pieces 7 a provided on the second clutch holder 7 are fitted into the first clutch holder 6 and rotate integrally with the winding roller 2. is there. In the second clutch holder 7, the engagement end 9 a of the clutch spring 9 is movable in the axial direction by the width of the clutch cam groove 8. A space 30 is secured between the clutch holder 7 and the bottom surface of the rotator 4, and the movement of the engagement end 9 a in the clutch cam groove 8 is not hindered. As shown in FIG. 7, the clutch holder 6 is provided with a ridge 6a, the rotator 4 is provided with a groove 4a, and the ridge 6a is engaged with the groove 4a, whereby the rotator 4 and It cannot move relative to the clutch holder 6 and can move in the axial direction.

  The clutch cam groove 8 allows or prevents the winding rotational force of the winding roller 2 relative to the fixed shaft 3 by the winding biasing force of the coil spring 15. Specifically, as shown in FIG. 6, a pulling groove 10 a is formed along the outer peripheral direction of the stator 5. A return path groove 10b for guiding the engagement end 9a of the clutch spring 9 to return into the pulling groove 10a is connected to the pulling groove 10a via the introduction groove 10c, the pulling groove S1, the lock groove S2, and the release groove S3. ing. Further, the pull-down groove S1 and the lock groove S2, and the lock groove S2 and the release groove S3 are connected to form a plurality of triangular grooves as a whole.

  One of the return path grooves 10b is connected to the release groove S3, and the other is connected to the lifting groove 10a in a crossing manner. Further, the lock groove S2, the introduction groove 10c, and the pulling groove 10a are connected.

  That is, an annular shape that allows relative movement of the engagement end 9a in the winding direction of the screen P (direction B in FIG. 6) along the entire circumferential direction of the stator 5 with which the engagement end 9a of the clutch spring 9 is engaged. The raising groove 10a is engraved. When the engagement end 9a of the clutch spring 9 is positioned in the pulling groove 10a, the engagement end 9a is in a free state and the winding roller 2 can be rotated as shown in FIG. When the hand is released from the screen P, the screen P is wound on the winding roller 2.

  When the screen P is pulled downward against the urging force of the coil spring 15 (direction A in FIG. 6), the engagement end 9a of the clutch spring 9 in the pulling groove 10a is shown in FIGS. As shown, it engages with the pull-down groove S1 via the introduction groove 10c. At this time, the clutch spring 9 is reduced in diameter. Accordingly, since the friction is reduced, the screen P can be rewound if it is further lowered after engagement with the lowering groove S1.

  When the screen P is pulled down in this state and the hand is released from the screen P, the winding roller 2 is rotated in the pulling direction (direction B in FIG. 6) by the stored force of the coil spring 15. At the same time, as shown in FIG. 6, the engagement end 9a of the clutch spring 9 engages with the lock groove S2 located at the center. At this time, the clutch spring 9 is expanded in diameter. Then, the friction between the first clutch holder 6 and the clutch spring 9 is strengthened and integrated, so that the engagement end 9a of the clutch spring 9 is engaged with the lock groove S2 as shown by a two-dot chain line in FIG. Since the rotation of the clutch spring 9, the first clutch holder 6, and the rotator 4 is prevented and the rotation of the take-up roller 2 is prevented, the drawn screen P is locked at an arbitrary position.

  When the screen P that has been drawn out is further pulled out and the engagement end 9a of the clutch spring 9 is guided from the lock groove S2 to the release groove S3 by the biasing force of the coil spring 15, the clutch spring 9 comes into contact with the release groove S3. The diameter of 9 is reduced. 6 is guided based on the biasing force of the coil spring 15 from the state in which the engagement end 9a of the clutch spring 9 is positioned in the release groove S3, and is again guided into the lifting groove 10a via the return guide groove 10b. Can be unlocked. When the engaging end 9a of the clutch spring 9 is positioned in the pulling groove 10a and the engaging end 9a is in a free state and the winding roller 2 can rotate as shown in FIG. The screen P can be wound around the winding roller 2 by the force.

  On the other hand, as shown in FIG. 5B, the inner core 11 is pivotally fixed to the other end of the fixed shaft 3 inserted in the winding roller 2, and the end of the coil spring 15 is fixed. Yes. An outer core 12 is fixed to the inner periphery of the winding roller 2 so as to face the inner core 11, and the outer core 12 is slidably pressed by applying a biasing force of the compression spring 13 from the back. In addition, a grease layer 14 is formed between the inner core 11 and the outer core 12 that are in sliding contact with each other via a damper grease having a predetermined viscous resistance.

  The grease layer 14 is formed so that, for example, the side surface of the outer core 12 is circular with a depth of about 0.2 to 1.0 mm on the inner side surfaces of the inner core 11 and the outer core 12 that are in a cylindrical shape. It is formed by indenting into a shape. The outer core 12 is pressed against the inner core 11 by the compression spring 13 in a state where the formation space of the grease layer 14 is always maintained. The braking force is stabilized by the biasing force of the spring 13.

  Next, an example of use and operation of the best mode of the present invention configured as described above will be described. First, when the screen P is entirely wound up and the screen P is pulled back against the urging force of the coil spring 15 from the state where the engagement end 9a of the clutch spring 9 is in the clutch cam groove 8, FIG. As shown in FIG. 8, the engagement end 9a of the clutch spring 9 passes through the pull-down groove 10c (the winding roll 2, the rotator 4, the first clutch holder 6 and the engagement end 9a rotate together in the direction of arrow C in FIG. 8). And engage with the pull-down groove S1 of the clutch cam groove 8 (see FIG. 8). In this state, the diameter of the clutch spring 9 is reduced and the friction between the first clutch holder 6 and the clutch spring 9 is reduced. Therefore, the first clutch holder 6 is rotated relative to the clutch spring 9 and the winding roll 2 is moved. By rotating in the C direction, the screen P can be pulled down to a desired position.

  When the hand is released, the winding roller 2 is rotated in the winding direction (direction of arrow D in FIG. 8) by the stored energy of the coil spring 15. Then, together with the winding roller 2, the rotator 4, the first clutch holder 6, and the clutch spring 9 rotate together, the engagement end 9 a of the clutch spring 9 engages with the central lock groove S 2, and the clutch spring 9 expands. By increasing the diameter, the friction between the clutch spring 9 and the first clutch holder 6 is strengthened, and the fixed shaft 3, the clutch spring 9, the first clutch holder 6, and the rotator 4 are integrated, and the winding roller 2 is locked. It becomes. Thus, the lowered screen P is locked at an arbitrary position.

  When the pulled-down screen P is further lowered slightly, the engagement end 9a of the clutch spring 9 is engaged with the release groove S3 adjacent to the return path groove 10b, and when the hand is released from the screen P in this state, the clutch The engaging end 9 a of the spring 9 is guided to the pulling groove 10 a through the return path groove 10 b, and the screen P is wound around the winding roll 2 by the stored force of the coil spring 15. At that time, the inner core 11 and the outer core 12 rotate relative to each other, and a braking force acts on the outer core 12 by the viscous resistance of the grease of the grease layer formed on the contact surface. In that case, since it is urged | biased by the spring 13 with respect to a sliding surface, the stable braking force is exhibited.

  In addition, as shown in FIGS. 9 (a) and 9 (b), the rotation restricting device of the present invention is provided in the winding roller 2, and the lifting / lowering cord 38 is suspended and supported in the winding roller 2. The winding roller 2 is urged by a biasing means (not shown) such as a constant load spring or a torsion coil spring in the winding direction, and the lower end of the lifting / lowering cord 38 is lifted or lowered. It can also be applied to winding devices such as raising curtains, blinds and pleated screens.

  The lifting / lowering cord 38 includes a bottom rail 39 at the lower end thereof. As in the case of application to a roll blind, the winding roller 2 can be made to have a very small diameter, and the head box 40 incorporating the winding roller 2 can be formed small.

  INDUSTRIAL APPLICABILITY The present invention makes the clutch mechanism compact, and can be used in a wide range of fields, particularly as a rotation restricting device for small roll blinds.

The use condition of the roll blind in the best form for implementing this invention is shown, (a) is a top view, (b) is a front view, (c) is a side view. It is sectional drawing which shows the assembly | attachment state of the roll blind to glass, a sash, etc. The tension bar is shown, (a) is a plan view and (b) is a front view. The tension bar is shown, in which (a) is a partially cutaway sectional view seen from above, and (b) is a partially cutaway sectional view seen from the front direction. The internal structure of a winding roller is shown, (a) is sectional drawing of the one end side of a winding roller, (b) is sectional drawing of the other end side of a winding roller. It is an expanded view which shows the shape of the clutch cam groove provided in the stator. It is XX sectional drawing in FIG. It is YY sectional drawing in FIG. The other use state of a rotation control apparatus is shown, (a) is a side view of the state applied to winding apparatuses, such as a raising curtain, (b) is a side view of the state applied to winding apparatuses, such as a blind. It is.

Explanation of symbols

P ... Screen Q ... Bracket R ... Rail bar R1 ... Mounting surface R2 ... Mounting surface R3 ... Projection piece S ... Rail mounting bracket S1 ... Pull-down groove S2 ... Locking groove S3 ... Release groove 1 ... Roll blind 2 ... Winding roller 3 ... Fixed Shaft 4 ... Rotator 4a ... Groove 5 ... Stator 6 ... First clutch holder 6a ... Projection 6b ... Flange 7 ... Second clutch holder 7a ... Claw piece 8 ... Clutch cam groove 9 ... Clutch spring 9a ... Engagement end DESCRIPTION OF SYMBOLS 10a ... Pull-up groove 10b ... Return path groove 10c ... Introduction groove 11 ... Inner core 12 ... Outer core 13 ... Compression spring 14 ... Grease layer 15 ... Coil spring 16 ... Holder 16A ... Locking contact part 16B ... Base 16C ... Engagement Joint part 16D ... Contacting part 17 for locking 17 ... Square column part 18 ... Shaft fitting part 19 ... Bearing part 20a ... Surface fastener 20 ... Hook fastener 21 ... Double-sided tape 22 ... Heat reflector 23 ... Screw adjusting part 24 ... Tension bar 24A ... Large diameter pipe 24B ... Small diameter pipe 25 ... Guide cylinder part 25A ... Holding pipe part 26 ... Holding part 27 ... Tightening screw Part 28 ... Bracket mounting member 30 ... Space 37 ... Screw 38 ... Lifting cord 39 ... Bottom rail 40 ... Head box

Claims (4)

A fixed shaft that is non-rotatably attached to one bracket, a winding roller for winding the screen that is rotatably supported at one end by the fixed shaft, and is rotatably supported by the other bracket at the other end, A coil spring that is locked to the fixed shaft and whose other end is locked to the winding roller and is used as screen winding power, and the winding roller winds up the fixed shaft by a winding biasing force of the coil spring. In a roll blind that can be selected to allow or prevent rotation,
A clutch spring having one end engaged with a clutch cam groove carved in a stator that is non-rotatably fitted to the fixed shaft ;
In the clutch cam groove, the drawn screen is locked at an arbitrary position, and the drawn screen is slightly pulled out to escape to the return path groove, and then guided to the clutch cam groove again to be unlocked and wound. It has a plurality of locking grooves so as to be wound around the take-up roller,
The clutch spring is provided with a rotation restricting device that is movable in the axial direction with respect to the fixed shaft and that can rotate integrally with the winding roller,
The rotation restricting device fixes a rotator in the winding roller, the rotator is rotatably supported by the stator, and the clutch spring is supported by the clutch holder so as not to move in the axial direction. The clutch holder and the rotator A roll blind characterized in that it is provided with engagement means for engaging with each other so as not to be relatively rotatable and to be movable in the axial direction .   The clutch cam groove includes a pull-up groove that allows movement of the clutch spring end over the entire circumference of the fixed shaft during the winding operation, and a pull-down that guides the clutch spring end to the locking groove during the rewinding operation. And a locking groove that engages with the clutch spring end during the restriction operation, and a locking groove that guides the clutch spring end to return to the return path groove after the restriction operation is released. The roll blind according to 1. The engaging means includes a locking groove provided on the inner periphery of the rotator and a locking protrusion provided on the outer periphery of the clutch holder, and the clutch spring end is movable in the axial direction in the clutch cam groove. The roll blind according to claim 2, which is movable by a range. A winding member capable of winding is attached to a winding roller, the winding roller is rotatably supported on a fixed shaft, the winding roller is biased in a winding direction by a biasing means, and the winding In the take-up roller, the take-up operation by the energizing force of the energizing means, the rewind operation based on the rotation of the take-up roller, and the rotation of the take-up roller by the energizing means are prevented after the rewind operation. In the rotation restricting device for the winding member provided with the clutch device capable of selecting the restricting operation to be performed,
The clutch device includes a clutch cam groove carved in a stator that is non-rotatably fitted to the fixed shaft ,
A clutch holder that is axially movable and integrally rotatable with respect to the winding roller;
A rotator is fixed in the take-up roller, the rotator is rotatably supported by the stator, the clutch spring is supported so as not to move in the axial direction by a clutch holder, and the clutch holder and the rotator cannot be rotated relative to each other. And engaging means for movably engaging in the axial direction.
The clutch cam groove includes a pulling groove that allows movement of the clutch spring end during the winding operation, a pulling groove that guides the clutch spring end to the locking groove during the rewinding operation, and a restriction operation during the restricting operation. A locking groove that engages with the clutch spring end, and a locking groove that guides the clutch spring end to return to the return path groove after the restriction operation is released, and the clutch spring rewinds the clutch holder. The winding is characterized in that it can rotate relative to the rotation in the direction and cannot rotate in the winding direction of the clutch holder, and the clutch spring end can be guided in the clutch cam groove. A member rotation restricting device.

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