JP2009102916A - Roll screen device and method of braking winding action - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a roll screen device by which braking can be surely performed by gradually increasing resistance to the rotation of a winding part from the start of braking near the end of the winding action until winding is stopped when the screen is wound, and no mechanical impact is applied at the end of the rotation of the winding part. <P>SOLUTION: The roll screen device (S) comprises: a winding part (1) mounted on a bearing member (3); a base shaft (4) partly having a screw part (440) and being fixed to the bearing member (3); a power storing part (5) in which rotational power is stored by pulling out a reed screen (2) and rotating the winding part (1); and a braking part (9) for stopping the winding part (1) by applying a braking force in a manner that the resistance applied to the rotation of the winding part (1) gradually increases near the end of the winding action of the reed screen (2). <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a roll screen device and a winding braking method. More specifically, when the screen is operated to wind up, the resistance to rotation of the winding unit gradually increases from the point when the braking starts near the end of winding and stops until the braking stops. On what can be done.

The roll screen device can freely adjust the pull-out length of the screen. By performing a simple operation such as slightly pulling out the screen from the position where the screen has been pulled out by a required amount, the urging force such as a coil spring can be applied. It can be used to automatically wind up (wind up) the screen.
When rolling up the screen, the roll screen device is provided with a structural device to prevent mechanical shock and impact sound from being generated when the winding shaft stops at the end of winding. ing. As an example of such a roll screen, there is a roll screen described in Patent Document 1.

  This roll screen is a roll screen in which a spring is accommodated inside a winding cylinder rotatably supported by a side plate, and the screen is wound around the winding cylinder by the stored force of the spring. And a brake for reducing the screen winding speed from the final stage of screen winding.

  The brake includes a base shaft fixedly supported by the side plate, and a clutch case that is movable in the axial direction with respect to the winding cylinder and that moves on the base shaft as the winding cylinder rotates. And a brake portion provided on the end side of the base shaft. The brake part operates when the clutch case is locked to the brake part from the final stage of screen winding. The brake portion utilizes the resistance of a fluid having a high viscosity, and gives a certain resistance to the rotation of the winding cylinder when the winding of the screen is near the end.

JP-A-11-159265

However, the conventional “roll screen” has the following problems.
The brake portion gives a certain resistance to the rotation of the winding cylinder when the winding of the screen is near the end. That is, the resistance to the rotation of the winding cylinder from when braking starts to stop until it stops is substantially the same and does not change.

  For this reason, the performance of braking the take-up cylinder depends on the resistance strength of the brake unit set in advance, and the resistance strength deviates from the set value due to wear and deterioration over time. Will not work properly. For example, when the resistance of the brake unit becomes weaker than a set value, the winding cylinder cannot be stopped and a mechanical impact occurs at the end of rotation, thereby generating an impact sound. Further, when the resistance of the brake part becomes stronger than the set value, the winding cylinder does not rotate to the end and stops halfway, and the tip part of the screen remains partly hanging down.

  Further, the structure in which the brake portion uses the resistance of a fluid having a high viscosity has a risk of liquid leakage, so that the precision of parts and the precision of assembly of parts are required, and the structure is complicated. For this reason, there is a difficulty in reliability or durability, and it cannot be said that maintenance is good.

  Accordingly, an object of the present invention is to provide resistance to rotation of a winding unit (winding cylinder), that is, braking force, from when the screen is wound up to when it is near the end of winding and from when braking begins to work. It is intended to provide a roll screen device and a winding braking method in which mechanical shock does not occur at the end of rotation of the winding unit, while making it possible to reliably perform braking so as to become stronger.

  In addition to the above object, another object of the present invention is to provide a brake unit having a simple structure, excellent in reliability and durability, and excellent in maintainability.

  Means taken by the present invention to solve the above problems are as follows.

The present invention
In a roll screen device, when the winding unit is operated so as to wind up the screen, the resistance to rotation of the winding unit gradually increases until it stops near the end of winding and starts to brake. Equipped with a brake part,
It is a roll screen device.

The present invention
In a roll screen device, when the winding unit is operated so as to wind up the screen, the resistance to rotation of the winding unit gradually increases until it stops near the end of winding and starts to brake. It has a brake part with a coil spring to
The coil spring is twisted with the rotation of the winding part to reduce the winding diameter, and the winding part is stopped by tightening the core part into which the coil spring is fitted.
It is a roll screen device.

The present invention
Brake unit which is a roll screen device, and when it is operated to wind up the screen, the resistance to rotation of the winder gradually increases from when the wind is near to the end of winding until it stops braking. With
The brake part
A moving clutch disc that is screwed into the threaded portion of the base shaft, engages with the winding unit while being movable along the threaded portion, and rotates integrally with the winding unit;
A spring receiving member fixed to the base shaft;
A receiving clutch member rotatably attached to the base shaft and capable of transmitting the rotational force of the moving clutch disc;
Both ends are fixed to the spring receiving member and the receiving clutch member, and the braking force is applied so that the resistance to the rotation of the winding portion is gradually increased by twisting from the start of braking to the stop of the moving clutch disc until it stops. A coil spring;
A roll screen device.

The present invention
A winding part having a hollow part and attached to the screen so that it can be wound;
A bearing member that rotatably supports the winding portion in the axial circumferential direction;
A base shaft fixed to the bearing member and having a thread portion in part,
By pulling out the screen and rotating the winding unit, a power storage unit that stores the rotational force for winding the screen, and
Stop / stop release mechanism that releases the stop of the take-up unit so that the screen is taken up by the rotational force of the accumulator by stopping the take-up unit at the position where the screen is pulled out and further pulling out the screen from the pulled-out position When,
A decelerating unit that decelerates by applying a certain resistance to the rotation of the winding unit during the winding of the screen;
A brake unit that resists and stops rotation of the winding unit near the end of the screen winding,
With
The brake part
A moving clutch disc that is screwed into the threaded portion of the base shaft, engages with the winding unit while being movable along the threaded portion, and rotates integrally with the winding unit;
A spring receiving member fixed to the base shaft;
A receiving clutch member rotatably attached to the base shaft and capable of transmitting the rotational force of the moving clutch disc;
Both ends are fixed to the spring receiving member and the receiving clutch member, and the braking force is applied so that the resistance to the rotation of the winding portion is gradually increased by twisting from the start of braking to the stop of the moving clutch disc until it stops. A coil spring;
A roll screen device.

The roll screen device of the present invention comprises:
It is preferable that the coil spring is twisted along with the rotation of the winding portion to reduce the winding diameter, and the winding portion is stopped by tightening the core portion into which the coil spring is fitted.

A brake part constituting the roll screen device,
A moving clutch disc that is screwed into the threaded portion of the base shaft, engages with the winding unit while being movable along the threaded portion, and rotates integrally with the winding unit;
A spring receiving member fixed to the base shaft;
A receiving clutch member rotatably attached to the base shaft and capable of transmitting the rotational force of the moving clutch disc;
Both ends are fixed to the spring receiving member and the receiving clutch member, and the braking force is applied so that the resistance to the rotation of the winding portion is gradually increased by twisting from the start of braking to the stop of the moving clutch disc until it stops. A coil spring;
A brake structure for a roll screen device.

The present invention
In the roll screen device, when the screen is operated to wind up, the resistance to the rotation of the winding unit becomes gradually stronger from the time when the braking starts near the end of the winding until it stops,
This is a winding braking method in a roll screen device.

  The term “roll screen” described in the present specification and claims refers to a general sheet-like screen (including a film, cloth, etc.), a bag, etc. as a screen wound around the winding portion. It is used in a concept that includes those that have been adopted.

(Function)
The operation of the roll screen device according to the present invention will be described. Note that, here, each constituent element of the present invention is given and described in correspondence with the reference numerals given to the respective parts in the embodiments described later, but this provision of reference numerals is only for easy understanding of the explanation. However, it does not mean that the constituent elements are limited to the above-described parts.

  When the screen (2) of the roll screen device attached to the required location is pulled out, the winding unit (1) rotates. The winding part (1) rotates against the urging force of the energy storage part (5), but at this time, the resistance force during braking of the brake part (9) described later becomes a reaction force, and the screen (2) Assist the force required to pull out. At the same time, a rotational force for winding the screen (2) is stored in the power storage unit (5). When the required amount of the screen (2) is pulled out and stopped, the stop / stop release mechanism (7) is actuated to stop the operation, and the take-up unit (1) rotates slightly back and stops. (2) also stops.

At the position where the screen (2) is stopped, pulling out the screen (2) a little further activates the stop / stop release mechanism (7) to perform the stop release operation, and the rotation of the energy storage (5) The winder (1) is rotated so as to wind the screen (2) by force.
When the screen (2) is wound up, the urging force of the power storage unit (5) is strong, so that the reduction unit (8) gives a certain resistance to the rotation of the winding unit (1) and decelerates.

  When the winding of the screen (2) is near the end, the moving clutch disc (98) rotating together with the winding portion (1) moves along the screw portion (440) of the base shaft (4), and the receiving clutch member In contact with (93), the rotational force of the moving clutch disc (98) is transmitted in the direction (force accumulation direction) in which the resistance of the coil spring (97) increases. When the coil spring (97) is twisted, the braking force is applied so that the resistance against rotation gradually increases with respect to the moving clutch disc (98) and the winding portion (1) rotating integrally with the reaction force. Is granted.

  By applying this braking force, the rotating moving clutch disc (98) and the winding unit (1) are gradually attenuated in rotational force, and the pre-adjusted position, that is, the screen (2) is almost entirely. When wound, the moving clutch disc (98) and the winding unit (1) stop returning. Thus, no mechanical shock occurs at the end of rotation of the winding part (1). Note that the coil spring (97) is twisted and the winding part (1) is stopped by tightening the core part, so that the material of the coil spring (97) is at the end of rotation where the winding part (1) stops. It is possible to more reliably prevent an impact from occurring in combination with elasticity.

(A) According to the present invention, when the roll screen device is operated so as to wind up the screen, the resistance to the rotation of the winding unit from the time when the braking starts near the end of winding and stops until it stops, that is, Since the braking force is gradually increased, the braking can be surely performed, and the mechanical shock at the end of rotation of the winding unit does not occur.

(B) According to the present invention, the resistance force at the time of braking of the brake portion becomes a reaction force, and the force required to pull out the screen can be assisted. As a result, the screen can be pulled out with a smaller force in the initial stage of pulling out the screen.

(C) A roll screen device having a structure in which the coil spring is twisted with the rotation of the winding part to reduce the winding diameter, and the winding part is stopped by tightening the core part into which the coil spring is fitted. It is possible to more reliably prevent an impact from occurring in combination with the elasticity of the material of the coil spring at the rotation end to stop.

The present invention will be described in detail based on the embodiments shown in the drawings.
FIG. 1 shows an embodiment of a roll screen device according to the present invention, and is a cross-sectional explanatory view in which a part in the longitudinal direction is omitted.
2 is a cross-sectional view taken along line AA in FIG.
FIG. 3 is a perspective explanatory view of the brake part.
FIG. 4 is an exploded perspective view of the brake unit.

  The roll screen device S is fixed to the winding unit 1, the collar 2 attached to the winding unit 1 so as to be capable of winding, the bearing member 3 that supports the winding unit 1 so as to be rotatable in the axial direction, and the bearing member 3. Stopping and stopping of the winding unit 1, the accumulation unit 5 that accumulates the return rotational force of the winding unit 1, the force accumulation adjustment unit 6 that can adjust the urging force in the winding direction by the accumulation unit 5 Stop / stop release mechanism 7 for releasing, decelerating portion 8 for decelerating the rotation at the time of return rotation of the winding portion 1, and stopping by giving resistance to the rotation of the winding portion 1 near the end of winding at the time of return rotation It is comprised by the brake part 9 to be made. Hereinafter, each part will be described in detail.

(Bearing member 3)
The bearing member 3 includes a frame member 30 having a required length, and side brackets 31 and 32 attached to both ends of the frame member 30 by screws. The side brackets 31 and 32 are provided in parallel to each other and in a direction perpendicular to the frame member 30. Bearing tools 33 and 34 whose front side is gradually reduced in diameter are screwed to the inner side of the front part of the side brackets 31 and 32.

(Base 4)
The base shaft 4 is attached to the bearing 33 on one side (left side in FIG. 1). The base shaft 4 includes a clutch shaft 41 that is fixed to the front portion of the bearing tool 33 so as not to rotate in the axial circumferential direction. A shaft-shaped shaft tube 42 having a required length is connected to the front side of the clutch shaft 41. The shaft tube 42 is externally fitted to the clutch shaft 41 and is fixed to both shafts with a stop pin 43 passing therethrough.

A bolt 44 having a required length having a screw portion 440 on the front side is connected to the tip of the shaft tube 42. The base of the bolt 44 is inserted at the tip of the shaft tube 42, and is fixed together with a limiter drum 90 that constitutes a brake part 9 described later, through a stop pin 45. The bolt 44 is provided with a stopper 46 having a large diameter at the base of the screw portion 440. Note that the screw portion 440 is a left-hand screw in the present embodiment.
A brake portion 9 is provided on the front side of the base shaft 4. The structure of the brake unit 9 will be described later.

  A spring drive member 60 is attached to the clutch shaft 41 so as to be rotatable in the axial direction from the base side of the small diameter portion 410 of the clutch shaft 41 to the large diameter portion 411. The spring drive member 60 constitutes the storage force adjustment unit 6. The structure of the spring drive member 60 will be described later.

(Winding part 1)
On the spring drive member 60, the winding tube receiver 10 constituting the winding unit 1 is attached to the spring drive member 60 so as to be rotatable in the axial direction.
On the other hand, the take-up tube holder 11 constituting the take-up unit 1 is attached to the other side bearing tool 34 so as to be rotatable in the axial direction with respect to the bearing tool 34.

  On the outer periphery of the winding tube receiver 10 and the winding tube receiver 11, an anti-winding plate 12 having a circular outer shape is fixed. Further, between the take-up tube receiver 10 and the take-up tube receiver 11, a cylindrical take-up tube 13 is attached with both ends fitted into the respective outer peripheral portions.

On the inner surface of the winding cylinder 13, a protrusion 14 is provided at one place in the circumferential direction so as to be parallel to the axial direction. The winding tube 13 is fixed by locking both ends of the ridge 14 to locking grooves 15 provided on the outer peripheral surfaces of the winding tube receiver 10 and the winding tube receiver 11.
One end of the flange 2 is attached to the outer surface side of the winding cylinder 13. The length of the collar 2 is set to a length that can be wound around the winding cylinder 13 a required number of times (for example, eight times: not limited to this number). Reference numeral 20 is a handle, and 21 is a weight bar.

(Power storage unit 5)
The accumulator 5 includes a substantially cylindrical spring head member 50. The spring head member 50 is attached to the small diameter portion 410 on the front side of the clutch shaft 41 so as not to move in the axial direction and to be rotatable in the axial circumferential direction. Specifically, the small-diameter portion 51 provided on the inner peripheral portion of the spring head member 50 is fitted between the proximal end of the shaft tube 42 and the distal end of the spring drive member 60. On the outer periphery of the spring head member 50, a spring mounting portion 52 having a large diameter is provided in the middle in the longitudinal direction. A plurality of protrusions 58 are provided in the axial direction on the inner peripheral portion of the spring head member 50.

  Further, a substantially cylindrical spring end member 53 is attached to the front side of the shaft tube 42 so as to be movable in the axial direction and rotatable in the axial direction. On the outer peripheral portion of the spring end member 53, a large-diameter spring mounting portion 54 is provided in the middle in the longitudinal direction. Further, a locking plate 55 having a substantially circular outer shape and a large diameter is provided at the tip of the spring end member 53 (the right end portion in FIG. 1).

  A locking recess 56 that locks to the protrusion 14 of the winding tube 13 is provided at one place on the outer peripheral portion of the locking plate 55 so as to be partially cut away. The spring end member 53 does not rotate in the axial circumferential direction with respect to the winding cylinder 13 and moves along the axial tube 42 in the axial direction with the locking recess 56 locked to the protrusion 14. Is possible.

  A coil spring 57 having a required length is attached between the spring head member 50 and the spring end member 53. The coil spring 57 is left-handed in the present embodiment, and one end is connected to the spring mounting portion 52 of the spring head member 50, the other end is connected to the spring mounting portion 54 of the spring end member 53, and the coil spring 57 is between the wire pitches of the coil spring 57. Further, the tip of the wire rod bent into a hook shape is inserted into a hole (reference numeral omitted) provided in the spring mounting portion 54 and attached.

  According to this structure, the spring end member 53 is rotated in the direction against the repulsive force of the coil spring 57 by the rotation of the winding cylinder 13 with the pulling out of the rod 2, so that the coil spring 57 is gradually wound and wound. The rotational force that returns and rotates the cylinder 13 is stored. Since the coil spring 57 slightly extends as it is tightened, the spring end member 53 moves to the limiter drum 90 side.

(Accumulation adjuster 6)
Since the stored energy adjustment unit 6 of the present embodiment employs a known general technique, a detailed description of a part of its structure is omitted, and only an outline is given.

  As described above, the spring drive member 60 constitutes the force accumulation adjusting unit 6. The spring drive member 60 is rotatably fitted on the small-diameter portion 410 of the clutch shaft 41, and a locking groove 61 is provided in the axial direction on the outer peripheral portion of the small-diameter portion 600 on the tip side. A plurality of the locking grooves 61 are provided in the axial circumferential direction. The spring drive member 60 can be rotated integrally with the spring head member 50 by inserting the front portion side into the base portion of the spring head member 50 and locking each locking groove 61 and each protrusion 58. It is.

  A spring handle member 62 is attached to the large-diameter portion 411 of the clutch shaft 41 so as to be rotatably fitted in the axial circumferential direction. The dial portion 63 of the spring handle member 62 is located between the side bracket 31 and the winding slip prevention plate 12.

  A control spring 64 that is a coil spring is attached to the large-diameter portion 411 of the clutch shaft 41 with a slightly tight outer fit. The control spring 64 is right-handed in the present embodiment, and locking portions (reference numerals are omitted) are provided at both ends of the wire (positions forming approximately 180 ° in the axial circumferential direction).

  One of the locking portions of the control spring 64 is in contact with a locking portion (reference numeral omitted) of the spring handle member 62 in both forward and reverse rotations. In addition, the other of the engaging portions of the control spring 64 is brought into contact with the engaging portion (reference numeral omitted) of the spring drive member 60 in both forward and reverse rotations.

  According to this structure, when the dial portion 63 is turned to rotate the spring handle member 62 to the right, a force is applied to the locking portion of the control spring 64 in the direction in which the control spring 64 is loosened, and the spring handle member 62 and the spring drive member 60 and the spring head member 50 rotate together. Thereby, the accumulation force (biasing force) of the coil spring 57 can be strengthened.

  When the rotation of the dial portion 63 is stopped, the spring head member 50 and the spring drive member 60 try to rotate in the opposite direction by the biasing force of the coil spring 57. As a result, the control spring 64 is now tightened and fixed to the clutch shaft 41, and the spring head member 50 and the spring drive member 60 are stopped. In this state, the control spring 64, the spring head member 50, and the spring drive member 60 are not substantially loosened.

  On the other hand, when the stored force of the coil spring 57 is weakened, when the spring handle member 62 is rotated in the opposite direction to that for strengthening, a force is applied in the direction in which the control spring 64 is loosened, and the spring handle member 62 and the spring drive member 60 and The spring head member 50 rotates together, and the stored force of the coil spring 57 can be weakened appropriately.

  As described above, according to the storage force adjustment unit 6, the strength of the storage force set in advance in the manufacturing stage can be appropriately adjusted during use. That is, for example, if the accumulated force (also referred to as the first winding) preliminarily applied to the coil spring 57 is imparted with the accumulated force adjusting unit 6 as needed (if the initial winding is made stronger), the rod 2 is pulled out. The total accumulated power can be strengthened. As a result, it is possible to appropriately set the accumulated force to the most suitable strength so that the apparatus operates stably. For example, the accumulated force of the accumulated force unit 5 is reduced due to wear or deterioration of each part such as the coil spring 57 over time. The stored power can be adjusted even when the strength of the power deviates from the initially set value.

(Stop / stop release mechanism part 7 and deceleration part 8)
On the other bearing tool 34 side, a stop / stop release mechanism portion 7 and a speed reduction portion 8 are provided. The stop / stop release mechanism unit 7 and the speed reduction unit 8 employ a known general technique (for the stop / stop release mechanism unit 7, for example, Japanese Patent Laid-Open No. 60-188591). The detailed description of is omitted, and the outline will be described.

  The stop / stop release mechanism 7 includes a stopper shaft 74 that is mounted on the bearing 34 so as not to rotate in the axial direction. A stopper drum member 70 is mounted on the stopper shaft 74 so as to be rotatable in the axial direction by external fitting. A control spring 73 is interposed between the stopper shaft 74 and the stopper drum member 70. The control spring 73 is right-handed in this embodiment. One end of the wire rod of the control spring 73 is locked to the stopper drum member 70.

  When the stopper drum member 70 tries to rotate in the pulling-out direction of the flange 2, the control spring 73 is loosened and the stopper drum member 70 can rotate. Further, when the stopper drum member 70 tries to rotate in the opposite direction, the control spring 73 is tightened and the stopper drum member 70 is fixed to the stopper shaft 74 and cannot be rotated.

  A control groove 71 is provided on the outer periphery of the stopper drum member 70, and a resin control ball 72 is disposed between the control groove 71 and the take-up tube holder 11. The control ball 72 is movably fitted in a guide groove 110 provided in one axial direction on the inner surface of the winding tube holder 11, and is sandwiched between the control groove 71 and the guide groove 110. It moves along the guide groove 110 while being held.

  According to this structure, when the stopper drum member 70 is rotated together with the winding cylinder 13 by pulling out the rod 2, the control spring 73 is loosened, and the winding cylinder 13, the winding cylinder holder 11, and the stopper drum member 70 are moved. Rotate together. The take-up tube holder 11 and the stopper drum member 70 rotate integrally in this rotation direction when the control ball 72 is locked to the first locking portion of the control groove 71.

  When the pulling out of the rod 2 is stopped, the winding cylinder 13 attempts to return and rotate due to the urging force of the coil spring 57 of the power storage unit 5. As a result, the locking position of the control ball 72 with respect to the control groove 71 is changed from the first locking portion to the second locking portion on the opposite side, and the take-up tube holder 11 is connected to the stopper drum member 70 in this rotational direction. Become one. At the same time, the control spring 73 is tightened by the stopper drum member 70 that tries to rotate reversely to the above, and the winding cylinder 13, the winding cylinder holder 11, and the stopper drum member 70 are stopped.

  Subsequently, when the hook 2 is pulled out again by a small amount, the stopper drum member 70 remains stopped, the winding cylinder 13 and the winding cylinder holder 11 rotate together, and the control ball 72 is moved into the second position of the control groove 71. Move away from the locking part. And if the drawer | drawing-out of the collar 2 is stopped and a hand is released, the control ball | bowl 72 will be guide | induced to the path | route which does not have the latching | locking part of the control groove | channel 71. FIG.

  As a result, the winding tube holder 11 and the winding tube 13 can be rotated in the return direction with respect to the stopped stopper drum member 70, and can be rotated back by the biasing force of the coil spring 57 of the power storage unit 5. . When the rod 2 is pulled out next, the control ball 72 is instantaneously guided to the first locking portion of the control groove 71 by the rotation of the winding cylinder 13 and the winding cylinder holder 11.

A speed reduction portion 8 is provided at the front portion of the stopper drum member 70. The speed reduction unit 8 includes a bottomed cylindrical control case 80 attached to the tip of the stopper drum member 70.
Inside the control case 80, a governor mechanism portion 82 having a planetary gear 81 is provided. The governor mechanism unit 82 gives an appropriate resistance to the winding unit 1 when the winding tube 13 returns and rotates, and controls the rotational speed of the winding tube 13 to an appropriate speed.

(Brake part 9)
The brake unit 9 includes a limiter drum 90. The limiter drum 90 is a spring receiving member, and is fixed to the distal end portion of the shaft tube 42 as described above. A spring mounting portion 91 is provided on the outer peripheral portion on the large diameter side of the limiter drum 90. A small diameter portion 930 at the tip of the clutch drum 93 described below can be inserted into and removed from the large diameter inner diameter portion 92 of the limiter drum 90. The small diameter portion 930 constitutes a core portion into which the coil spring 97 is fitted.

  The clutch drum 93 is a receiving clutch member, is substantially cylindrical, and is attached to the base side of the bolt 44 so as to be movable in the axial direction. The clutch drum 93 has a small-diameter portion 930 and a large-diameter portion 931, and the large-diameter portion 931 is provided with a spring mounting portion 94. On the inner peripheral surface of the clutch drum 93, a protrusion 95 is provided over the entire circumference so as to be hooked on the stopper 46 at one location near the large-diameter portion 931.

  A clutch surface 96 having a spiral surface 960 and a stepped portion 961 is provided on the end surface of the clutch drum 93 on the large diameter portion 931 side. The clutch surface 96 is engaged with a clutch surface 99 of a moving clutch panel 98 described later.

  A coil spring 97 having a required length is attached between the limiter drum 90 and the clutch drum 93. The coil spring 97 is right-handed in the present embodiment, and has one end portion connected to the spring mounting portion 91 of the limiter drum 90, the other end portion connected to the spring mounting portion 94 of the clutch drum 93, and the coil spring 97 between the wire pitches of the coil spring 97. Further, a tip end portion 970 (shown in FIG. 4) bent into a hook shape of a wire rod is inserted into a hole (not shown) provided in the spring mounting portion 94 and attached.

  A moving clutch disc 98 having a substantially circular outer shape is attached to the screw portion 440 of the bolt 44 by screwing a screw hole 980 in the center portion. A locking recess 981 for locking to the protrusion 14 of the winding tube 13 is provided at one location on the outer peripheral portion of the moving clutch board 98 so as to be partially cut away. The moving clutch board 98 does not rotate in the axial direction relative to the winding cylinder 13 and moves along the screw part 440 in the axial direction with the locking recess 981 locked to the protrusion 14. Is possible.

  A clutch surface 99 having a spiral surface 990 and a stepped portion 991 is provided on one surface of the moving clutch panel 98 (a surface facing the clutch surface 96 of the clutch drum 93). The clutch surface 96 of the clutch drum 93 and the clutch surface 99 of the moving clutch panel 98 are locked only in one rotation direction (the direction of the accumulated force of the coil spring 97). Turns and turns.

  Further, the position of the moving clutch disc 98 at the screw portion 440 is such that the clutch surface 99 of the moving clutch disc 98 is clutched at a required timing near the end of winding when the winding cylinder 13 is operated so as to wind the rod 2. It is set in advance so as to be engaged with the clutch surface 96 of the drum 93. In the present embodiment, the clutch surfaces 96 and 99 are set to be locked at a timing at which the moving clutch board 98 can make two more rotations until the rotation stops, but the present invention is not limited to this.

(Function)
FIG. 5 is an explanatory view showing the movement when the brake portion is operated.
The movement and operation of the roll screen device S will be described with reference to FIGS. The movements of the energy storage unit 5, the energy storage adjustment unit 6, the stop / stop release mechanism unit 7 and the speed reduction unit 8 have been described in the above-mentioned sections, and will be briefly described here.

(1) Pull out the cage 2 of the roll screen device S attached to the wall surface or the like on the window to an appropriate position. Along with this, the winding cylinder 13 rotates. The winding cylinder 13 rotates against the urging force of the coil spring 57 of the accumulator 5, but at this time, the resistance force when braking by the coil spring 97 of the brake 9 becomes a reaction force, The force required when pulling out can be assisted. At the same time, a rotational force for winding up the kite 2 is stored in the power storage unit 5. Further, the moving clutch disc 98 that rotates together with the winding cylinder 13 moves in a direction away from the clutch drum 93 along the screw portion 440 of the base shaft 4 (see FIG. 5A).

(2) As described above, when the hook 2 is pulled out by a required amount and stopped being pulled out, the stop / stop release mechanism portion 7 is operated to perform a stop operation, and the take-up cylinder 13 is rotated back slightly to stop.簾 2 also stops at the position where it is pulled out.

(3) At the position where the heel 2 is stopped, by further pulling out the heel 2, the stop / stop release mechanism portion 7 is operated and the stop release operation is performed. Thereby, the winding cylinder 13 returns and rotates by the rotational force stored in the coil spring 57 of the power storage unit 5, and the rod 2 is wound up. Since the rotational force of the accumulator 5 is strong when winding the kite 2, a certain resistance is given to the rotation of the winding cylinder 13 by the speed reducer 8 so that there is little noise and the winding speed does not become too fast. Controlled.

(4) The moving clutch disk 98 rotating together with the winding cylinder 13 that is rotating back is moving toward the clutch drum 93 along the screw portion 440 of the base shaft 4. When the winding of the kite 2 is near the end, the clutch surface 99 of the moving clutch panel 98 comes into contact with the clutch surface 96 of the clutch drum 93 (see FIG. 5B), and the spiral surfaces 990 and 960 guide each other. Thus, the step portions 991 and 961 are locked. As a result, the rotational force of the moving clutch panel 98 is transmitted to the force accumulation direction of the coil spring 97 via the clutch drum 93.

(5) When the clutch drum 93 rotates and the coil spring 97 is twisted and stored, the reaction force causes the moving clutch disc 98 and the winding cylinder 13 that rotates together with the moving clutch disc 98 to rotate. A braking force is applied so that the resistance gradually increases. By applying this braking force, the rotating moving clutch disc 98 and the winding cylinder 13 are gradually attenuated in the rotating force, and the position adjusted in advance, that is, when the rod 2 is almost entirely wound up, The return rotation of the moving clutch board 98 and the winding cylinder 13 stops.

  When the clutch drum 93 is rotated and the coil spring 97 is twisted, the diameter (winding diameter) of the coil spring 97 is reduced, the small diameter portion 930 is tightened, and the rotation of the clutch drum 93 is stopped. Accordingly, the rotation of the moving clutch disc 98 and the winding cylinder 13 is stopped. At this time, the clutch drum 93 is pushed by the moving clutch disc 98, and the tip of the small diameter portion 930 enters the inner diameter portion 92 of the limiter drum 90, but the tip does not hit the inner end of the inner diameter portion 92. Is set. Furthermore, it is set so that the moving clutch disc 98 does not hit the stopper 46 (see FIG. 5C). Thus, no mechanical shock occurs at the end of rotation of the winding cylinder 13.

  Note that the terms and expressions used in the present specification are merely explanatory and not restrictive, and do not exclude terms and expressions equivalent to the above terms and expressions. The present invention is not limited to the illustrated embodiment, and various modifications can be made within the scope of the technical idea.

Cross-sectional explanatory drawing which showed embodiment of the roll screen apparatus which concerns on this invention, and abbreviate | omitted a part of the longitudinal direction. AA sectional drawing in FIG. The perspective explanatory drawing of a brake part. Exploded perspective view of the brake part. Explanatory drawing which shows a motion when a brake part act | operates.

Explanation of symbols

DESCRIPTION OF SYMBOLS S Roll screen apparatus 1 Winding part 10 Winding tube holder 11 Winding tube holder 110 Guide groove 12 Winding prevention plate 13 Winding tube 14 Projection 15 Locking groove 2 ２０ 20 Handle 21 Weight bar 3 Bearing member 30 Mounting member 31, 32 Side bracket 33 Bearing tool 34 Bearing tool 4 Base shaft 41 Clutch shaft 410 Small diameter portion 411 Large diameter portion 42 Shaft tube 43 Stop pin 44 Bolt 440 Screw portion 45 Stop pin 46 Stopper 5 Power storage portion 50 Spring head member 51 Small-diameter portion 52 Spring attachment portion 53 Spring end member 54 Spring attachment portion 55 Locking plate 56 Locking recess 57 Coil spring 58 Projection 6 Accumulated force adjustment portion 60 Spring drive member 600 Small diameter portion 61 Locking groove 62 Spring handle member 63 Dial 64 Control spring 7 Stop / stop release mechanism 70 Stopper -Drum member 71 Control groove 72 Control ball 73 Control spring 74 Stopper shaft 8 Reduction part 80 Control case 81 Planetary gear 82 Governor mechanism part 9 Brake part 90 Limiter drum 91 Spring mounting part 92 Inner diameter part 93 Clutch drum 930 Small diameter part 931 Large diameter Portion 94 Spring mounting portion 95 Projection portion 96 Clutch surface 960 Spiral surface 961 Step portion 97 Coil spring 970 Tip portion 98 Moving clutch disc 980 Screw hole 981 Locking recess 99 Clutch surface 990 Spiral surface 991 Step portion

Claims (7)

When the winding unit (1) is operated so as to wind up the screen (2), the winding unit (1) is moved from the end of the winding to the end of braking until it stops. A brake portion (9) that gradually increases the resistance to rotation of the
Roll screen device. When the winding unit (1) is operated so as to wind up the screen (2), the winding unit (1) is moved from the end of the winding to the end of braking until it stops. A brake part (9) having a coil spring (97) that gradually increases resistance to rotation of
The coil spring (97) is twisted with the rotation of the winding part (1) to reduce the winding diameter, and the winding part (1) is stopped by tightening the core part into which the coil spring (97) is fitted.
Roll screen device. When the roll screen device is operated so as to wind up the screen (2), the resistance to the rotation of the winder (1) gradually increases from the point when it comes close to the end of winding until it starts to brake and then stops. It has a brake part (9) to be
The brake part (9)
Screwed into the threaded portion (440) of the base shaft (4), locked with the winding portion (1) while being movable along the threaded portion (440), and integrated with the winding portion (1) Rotating clutch board (98),
A spring bearing member (90) fixed to the base shaft (4);
A receiving clutch member (93) that is rotatably attached to the base shaft (4) and that transmits the rotational force of the moving clutch disc (98);
Both ends are fixed to the spring receiving member (90) and the receiving clutch member (93), and from the start of braking to the moving clutch disc (98) until it stops, it is twisted to prevent the winding part (1) from rotating. A coil spring (97) for applying a braking force so that the resistance gradually increases,
With
Roll screen device. A winding part (1) having a hollow part and attached to the screen (2) in a windable manner;
A bearing member (3) that rotatably supports the winding portion (1) in the axial circumferential direction;
A base shaft (4) fixed to the bearing member (3) and partially having a screw portion (440);
A power storage unit (5) in which a rotational force for winding the screen (2) is stored by pulling out the screen (2) and rotating the winding unit (1),
The winding unit (1) is stopped at the position where the screen (2) is pulled out, and the screen (2) is further pulled out from the pulled out position, so that the screen (2) is wound up by the rotational force of the power storage unit (5). A stop / stop release mechanism part (7) for releasing the stop of the winding part (1),
A speed reducer (8) that decelerates by applying a certain resistance to the rotation of the winder (1) when winding the screen (2);
A brake part (9) that resists and stops rotation of the winding part (1) near the end of winding of the screen (2),
With
The brake part (9)
Screwed into the screw part (440) of the base shaft (4), locked with the winding part (1) in a movable state along the screw part (440), and integrated with the winding part (1) Rotating clutch board (98),
A spring bearing member (90) fixed to the base shaft (4);
A receiving clutch member (93) that is rotatably attached to the base shaft (4) and that transmits the rotational force of the moving clutch disc (98);
Both ends are fixed to the spring receiving member (90) and the receiving clutch member (93). A coil spring (97) for applying a braking force so that the resistance gradually increases,
A roll screen device. The coil spring (97) is twisted with the rotation of the winding part (1) to reduce the winding diameter, and the winding part (1) is stopped by tightening the core part into which the coil spring (97) is fitted.
The roll screen device according to claim 3 or 4. A brake part constituting the roll screen device according to claim 3 or 4,
Screwed into the threaded portion (440) of the base shaft (4), locked with the winding portion (1) while being movable along the threaded portion (440), and integrated with the winding portion (1) Rotating clutch board (98),
A spring bearing member (90) fixed to the base shaft (4);
A receiving clutch member (93) that is rotatably attached to the base shaft (4) and that transmits the rotational force of the moving clutch disc (98);
Both ends are fixed to the spring receiving member (90) and the receiving clutch member (93), and from the start of braking to the moving clutch disc (98) until it stops, it is twisted to prevent the winding part (1) from rotating. A coil spring (97) for applying a braking force so that the resistance gradually increases,
With
Brake structure of roll screen device. In the roll screen device, when the screen (2) is operated to wind up, the resistance to the rotation of the winding unit (1) is gradually increased from the point when the winding is near to the end of winding to the point when braking starts. To
A winding braking method in a roll screen device.

Images