JP2011006922A - Irregular winding preventive device for roll blind - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an irregular winding preventive device for a roll blind, which regulates automatically a weight bar in a position not causing an irregular winding in a screen.SOLUTION: Wire runners 22a, 22b supported vertically movably with guide wires 6 are supported to be movable in the longitudinal direction of the weight bar, at both ends of the weight bar 4, and the weight bar 4 includes energizing means 25a, 25b energized based on the movement of the wire runners 22a, 22b, to hold the weight bar 4 in the position not causing the irregular winding in the screen 3.

Description

  The present invention relates to a screen lifting device for a roll blind, and more particularly, to a winding slip prevention device for preventing the screen from slipping.

  Conventionally, in a large-sized electric roller blind that moves up and down the screen by rotating the screen winding shaft of the roll blind with the driving force of the motor, the upper limit stop device that stops the operation of the motor when the screen is pulled up to the upper limit and the screen is the lower limit. A lower limit stop device is provided for stopping the operation of the motor when it is lowered to the position.

Such an electric roller blind has been proposed that includes a winding deviation detection device that detects the winding deviation of the screen and stops the operation of the motor. (See Patent Document 1)
There has also been proposed a roll blind provided with a winding slip prevention device for preventing the screen from slipping. Such an anti-winding device has been proposed in which a weight is attached to the lower plate at the lower end of the screen to prevent the anti-winding. (See Patent Document 2)
In Patent Documents 3 and 4, the vertical force of the curtain rail in which both ends of the curtain tip bar are positioned on both sides of the curtain fabric by the biasing force of the coil spring accommodated at both ends of the curtain tip rod of the hoisting curtain is disclosed. A holding device that holds the curtain fabric in position by frictional force against its own weight is disclosed.

Japanese Patent No. 3542743 Actual Kosho 63-24783 Utility model registration No. 2502594 Japanese Utility Model Sho 61-80999

  In the anti-winding device such as the above-mentioned Patent Document 2, the screen is adjusted to adjust the position of the weight by adjusting the position where the weight is attached. Therefore, it is necessary to appropriately adjust the position of the weight according to the elongation of the fabric of the screen. There is.

Therefore, when the attachment position of the weight is not appropriate, there is a problem that the occurrence of winding deviation cannot be prevented.
The apparatus as described in Patent Document 3 or Patent Document 4 is not configured to automatically adjust to a position where no winding deviation occurs, but a strong frictional force that always faces the weight of the curtain fabric acts on the curtain rail. It is the structure to do. Accordingly, since the torque required for winding is increased, the operating force and the required torque of the motor are increased.

  An object of the present invention is to provide a roll blind anti-rolling device capable of automatically adjusting the weight bar to a position where the screen does not roll off.

  In claim 1, the screen is suspended from a winding shaft that is rotatably supported on the mounting surface, a weight bar is attached to the lower end of the screen, and the screen and the weight bar are attached based on the rotation of the winding shaft. In a roll blind in which a guide wire that can move up and down and supports the weight bar so as to move up and down is stretched on both sides in the longitudinal direction of the weight bar, a wire runner that is supported on the guide wire so as to move up and down, The weight bar is supported so as to be movable in the longitudinal direction of the weight bar, and the weight bar is urged by the movement of the wire runner to hold the weight bar at a position where the screen does not slip out. A biasing means was provided.

  According to a second aspect of the present invention, the guide wire is inserted into the distal end portion of the wire runner, and the urging means is disposed between the proximal end portion of the wire runner and the weight bar in the weight bar.

  In Claim 3, a pair of said wire runner is each supported to the both ends of the said weight bar so that a movement is possible, The said biasing means was each arrange | positioned between the base end part of each said wire runner, and the said weight bar. .

  In Claim 4, the said guide wire is inserted in the front-end | tip part of the said wire runner, the biasing means accommodating part which moves integrally with the said wire runner is provided in the said weight bar, The said biasing means accommodating part and the said weight bar The biasing means is disposed between the partition plate and the partition plate.

  According to a fifth aspect of the present invention, the pair of wire runners are movably supported at both ends of the weight bar, and biasing means accommodating portions that move integrally with the wire runners are provided on both sides of the partition plate, The urging means was provided on both sides of the plate.

  According to a sixth aspect of the present invention, a wire holder for holding the guide wire is provided on a support bracket of the take-up shaft, and an oblique side portion that is inclined with respect to the winding deviation direction of the screen is provided on a surface of the wire holder that faces the screen. Prepared.

  According to a seventh aspect of the present invention, the screen is suspended from a winding shaft that is rotatably supported by the mounting surface, a weight bar is attached to the lower end of the screen, and the screen and the weight bar are attached based on the rotation of the winding shaft. In a roll blind in which guide means that can move up and down and supports the weight bar so as to move up and down are stretched on both sides in the longitudinal direction of the weight bar, guided means that is supported by the guide means so as to move up and down is provided. The weight bar is supported on both ends of the bar so as to be movable in the longitudinal direction of the weight bar, and the weight bar is biased based on the movement of the guided means, so that the weight bar is not displaced on the screen. It has a coil spring that holds it at its natural length.

  According to the present invention, it is possible to provide a roll blind anti-winding device that can automatically adjust the weight bar to a position where the screen does not roll off.

It is a side view which shows the electric roll blind of one Embodiment. It is a front view which shows a limit base. It is a top view which shows operation | movement of a winding deviation detection lever. It is a top view which shows a wire holder. It is a front view which shows the weight bar provided with the winding slip prevention device. It is a top view which shows a wire runner. It is CC sectional view taken on the line in FIG. It is a front view which shows operation | movement of a winding slip prevention device. It is a front view which shows 2nd embodiment of a winding slip prevention device. It is a perspective view which shows a spring box. It is the DD sectional view taken on the line in FIG. It is a front view which shows operation | movement of the winding slip prevention apparatus of 2nd embodiment.

(First embodiment)
Hereinafter, a first embodiment of the present invention will be described with reference to the drawings. In the electric roller blind shown in FIG. 1, a winding shaft 2 is rotatably supported between support brackets 1 fixed to a mounting surface such as a wall surface, and a screen 3 is suspended from the winding shaft 2.

  A motor (not shown) having a base end supported by the support bracket 1 is disposed in the winding shaft 2, and the winding shaft 2 is rotated in the forward and reverse directions by the operation of the motor. When the winding shaft 2 is rotated in the winding direction of the screen 3, the screen 3 is wound and pulled up by the winding shaft 2, and when the winding shaft 2 is rotated in the rewinding direction of the screen 3. The screen 3 is unwound from the winding shaft 2 and descends.

  A weight bar 4 is attached to the lower end of the screen 3. Guide members 5 are attached to both ends of the weight bar 4, and guide wires (guide means) 6 extending in the vertical direction on both sides in the width direction of the screen 3 are inserted into the guide members 5.

  The lower end portion of the guide wire 6 is supported by a wire fixing portion 7 fixed to an attachment surface such as a floor surface at the lower limit position of the weight bar 4. An upper end portion of the guide wire 6 is supported by the support bracket 1.

Therefore, when the screen 3 is lifted and lowered, the weight bar 4 is lifted and lowered with the guide wire 6 being substantially positioned in the front-rear direction and the left-right direction.
A limit base 8 shown in FIGS. 2 and 3 is fixed to the support bracket 1, and a limit switch 9 is attached to the limit base 8.

  The limit base 8 is provided with a winding deviation detection lever 10 on the side of the limit switch 9. A specific configuration of the winding deviation detection lever 10 will be described. A support shaft 12 is provided in a vertical direction on a support member 11 fixed to the limit base 8. The part is rotatably supported.

  As shown in FIG. 3, the leading end side of the winding deviation detection lever 10 extends in a direction away from the end of the winding shaft 2, and then extends obliquely toward the end of the winding shaft 2. Furthermore, the front-end | tip part 13 is bent in the mountain shape. Further, as shown in FIGS. 1 and 2, the distal end portion 13 is formed wider in the vertical direction than the proximal end portion.

And the edge part of the screen 3 wound up by the winding shaft 2 contacts the top part 13a of the said front-end | tip part 13. As shown in FIG.
A torsion coil spring 14 is attached to the support shaft 12, one end of the torsion coil spring 14 abuts on the support member 11, and the other end abuts on the base end of the winding deviation detection lever 10. Yes.

  The winding deviation detecting lever 10 is always held in the state indicated by the solid line in FIG. 3 by the urging force of the torsion coil spring 14 with the support member 11 as a fulcrum. Further, when a winding displacement in the direction of arrow A shown in FIG. 3 occurs on the screen 3 wound around the winding shaft 2, the winding displacement detection lever 10 is pressed by the screen 3 and rotated as indicated by a chain line in FIG. The Then, the button 9a of the limit switch 9 is pressed at the base end portion of the winding deviation detection lever 10, and the operation of the motor is stopped.

  As shown in FIG. 2, a long plate-like limit lever 15 is supported on the limit base 8 so as to be movable up and down. One end of a coil spring 16 is attached to the limit lever 15, and the other end of the coil spring 16 is attached to the limit base 8. The limit lever 15 is always urged downward by the urging force of the coil spring 16, and is always located at the lower limit position shown in FIG.

  In the upper part of the limit lever 15, a pressing piece 17 is formed below the button 9a of the limit switch 9 so that the button 9a can be pressed when the limit lever 15 is pushed upward.

  The lower end edge of the limit lever 15 is located on the lifting locus of the end portion of the weight bar 4. When the weight bar 4 is pulled up to the upper limit, the end of the weight bar 4 comes into contact with the lower end of the limit lever 15 and pushes the limit lever 15 upward. Then, the button 9a is pressed by the pressing piece 17, and the operation of the motor is stopped.

  A wire holder 18 is attached to the lower end of the limit lever 15. As shown in FIG. 4, the wire holder 18 has a triangular guide portion 19 formed by bending the distal end portion of the metal plate, and the base end portion is attached to the lower end portion of the limit lever 15. The guide wire 6 is inserted through the guide portion 19.

  The guide portion 19 is formed such that the oblique side portion 20 faces the edge of the screen 3. Then, as shown in FIG. 4, when the screen 3 wound around the winding shaft 2 is unwound and the edge of the screen 3 approaches the guide portion 19 in the arrow B direction, The edge is guided along the oblique side portion 20 and is movable in the direction of winding deviation of the screen 3.

  Therefore, even if a winding deviation occurs in the screen 3 and the edge of the screen 3 comes into contact with the guide portion 19, the edge of the screen 3 is not folded back or strongly rubs against the guide portion 19.

  The weight bar 4 is provided with a winding slip prevention device for preventing the screen 3 from slipping. As shown in FIGS. 5 and 7, the weight bar 4 is formed of a hollow extruded shape, and square bar-like wire runners (guided means) 22a and 22b are attached to caps 21 attached to both ends thereof. The weight bar 4 is supported so as to be able to appear and retract in the longitudinal direction. The wire runners 22a and 22b are formed with the same length.

  As shown in FIG. 6, a bifurcated portion 23 is formed at the distal end of the wire runners 22a and 22b, and a screw shaft 24 is attached to the distal end of the bifurcated portion 23 so as to close the opening of the bifurcated portion 23. It is worn. The guide wire 6 is inserted into a space formed between the bifurcated portion 23 and the screw shaft 24.

  In the weight bar 4, the wire runners 22a and 22b are inserted into the coil springs 25a and 25b, and the base ends of the wire runners 22a and 22b prevent the coil springs 25a and 25b from coming off from the wire runners 22a and 22b. A retaining screw 26 is attached.

  The coil springs 25a and 25b are set to have the same urging force. When the winding does not occur normally, the coil springs 25a, 25b are in contact with the cap 21 with a natural length, and the weight bar 4 is positioned so that the lengths of the wire runners 22a, 22b exposed from the cap 21 are equal. That is, the left and right guide wires 6 are installed on the floor or the like so that the weight bar 4 is held at an intermediate position between the left and right guide wires 6. At that time, the urging force of the coil springs 25a and 25b with the cap 21 as a fulcrum does not act.

  In the weight bar 4 configured as described above, when a winding shift occurs in the screen 3 wound around the winding shaft 2, the weight bar 4 moves from the intermediate position of the guide wire 6 to one side as shown in FIG. For example, the coil spring 25a is compressed. The coil spring 25b relatively moves in the weight bar 4 with the movement of the weight bar 4 with its natural length.

  Then, the weight bar 4 moves toward the intermediate position of the guide wire 6 by the urging force in the extending direction of the coil spring 25a, and returns to the state shown in FIG. Therefore, the winding deviation of the screen 3 with respect to the winding shaft 2 is forcibly corrected.

In the electric roll blind and the winding slip prevention device of this embodiment, the following operational effects can be obtained.
(1) The weight bar 4 is held at an intermediate position between the guide wires 6 by the urging force of the coil springs 25 a and 25 b in the weight bar 4 to correct the winding deviation of the screen 3 on the winding shaft 2. it can.
(2) Since the urging force of the coil springs 25a and 25b does not act at the normal time (when the winding is not misaligned), the friction between the wire runners 22a and 22b and the guide wire 6 is small, and the winding shaft 2 is pulled up. Torque is small.
(3) By making the urging forces of the coil springs 25a and 25b the same, the weight bar 4 is automatically moved to a position where the winding deviation of the screen 3 does not occur without requiring adjustment due to elongation of the screen fabric. Can be held.
(4) Even if the edge of the screen 3 comes into contact with the wire holder 18, the screen 3 does not rub against the wire holder 18 by the oblique side portion 20, so that damage to the edge of the screen 3 can be prevented.
(Second embodiment)
9 to 12 show a second embodiment of the anti-winding device. The same components as those in the first embodiment will be described with the same reference numerals. As shown in FIG. 9, one end of the connecting members 31a and 31b is fixed to the wire runners (guided means) 22a and 22b, and the other end of the connecting members 31a and 31b is fixed to the end of the spring box 32, respectively. Has been. Accordingly, the wire runners 22 a and 22 b, the connecting members 31 a and 31 b, and the spring box 32 are integrally movable relative to the weight bar 4 in the longitudinal direction of the weight bar 4.

  As shown in FIGS. 10 and 11, the spring box 32 is formed in a square box shape that is relatively movable in the longitudinal direction within the weight bar 4, and the square box is opened in the vertical direction. Yes. At the upper and lower positions of the spring box 32, connecting members 34a and 34b fixed to the weight bar 4 with fixing screws 33 are disposed.

  The connecting members 34a and 34b are connected by a partition plate 35 penetrating the spring box 32 in the vertical direction, and coil springs 36a and 36b are arranged between the partition plate 35 and inner side surfaces on both sides of the spring box 32. It is installed.

  Further, on the inner side surfaces of both sides of the spring boxes 36a, 36b, columnar protrusions 37 are formed which engage with the coil springs 36a, 36b and hold the coil springs 36a, 36b in the radial direction.

  The coil springs 36a and 36b are set to have the same urging force. When the winding does not occur normally, the coil springs 36 a and 36 b are in contact with the partition plate 35 with a natural length, and the weight bar 4 is positioned so that the lengths of the wire runners 22 a and 22 b exposed from the cap 21 are equal. That is, the left and right guide wires 6 are installed on the floor or the like so that the weight bar 4 is held at an intermediate position between the left and right guide wires 6. At that time, the urging force of the coil springs 25a and 25b using the partition plate 35 as a fulcrum does not act.

  In the weight bar 4 configured in this way, when the winding deviation occurs in the screen 3 wound around the winding shaft 2, the weight bar 4 moves from the intermediate position of the guide wire 6 to one side as shown in FIG. For example, the coil spring 36a is compressed.

  Then, the weight bar 4 moves toward the intermediate position of the guide wire 6 by the urging force in the extending direction of the coil spring 36a, and returns to the state shown in FIG. Therefore, the winding deviation of the screen 3 with respect to the winding shaft 2 is forcibly corrected.

In the winding slip prevention device of this embodiment, in addition to the effects (1) and (2) obtained in the first embodiment, the following effects can be obtained.
(1) The fulcrum of the coil springs 36a and 36b is a partition plate 35 fixed to the weight bar 4, and the spring box 32 is connected to the wire runners 22a and 22b via the connecting members 34a and 34b. It is possible to improve the accuracy of detecting the state where the bar 4 is displaced from the intermediate position, that is, the state where the winding is displaced.

You may implement the said embodiment in the following aspects.
-The anti-winding device of 1st and 2nd embodiment can also be used for the roll blind which raises / lowers a screen manually.
In the first and second embodiments, the number of coil springs in the weight bar 4 may be one. The coil spring is compressed by moving the weight bar 4 from one position to the other, the coil spring is expanded by moving the weight bar 4 to the other, and the weight bar is held at the intermediate position by using the restoring force of the coil spring. To do. The number of parts can be reduced by using one coil spring.
In the first and second embodiments, the left and right coil springs 25a, 25b, 36a, and 36b are given only non-linear initial deflections at normal times (when no winding deviation occurs), and the left and right sides are slightly compressed. A guide wire 6 may be installed. In this way, even slight winding deviation can be corrected smoothly.
-In 1st and 2nd embodiment, although the wire runner as a guided means was guided to the up-down direction with the guide wire as a guide means, it was guided with the guide rail provided with the groove | channel of the cross section C shape or the cross section I shape. The means may be engaged so as to be immovable in the left-right direction and guided so as to be movable in the up-down direction.

  2 ... winding shaft, 3 ... screen, 4 ... weight bar, 6 ... guide means (guide wire), 18 ... wire holder, 20 ... oblique side, 22a, 22b ... guided means (wire runner), 25a, 25b, 36a, 36b ... biasing means (coil spring), 32 ... biasing means accommodating portion (spring box), 35 ... partition plate.

Claims (7)

The screen is suspended from a winding shaft that is rotatably supported on the mounting surface, a weight bar is attached to the lower end of the screen, and the screen and the weight bar can be raised and lowered based on the rotation of the winding shaft, In a roll blind in which a guide wire that supports the weight bar so as to be movable up and down is stretched on both sides in the longitudinal direction of the weight bar,
A wire runner supported by the guide wire so as to be movable up and down is supported at both ends of the weight bar so as to be movable in the longitudinal direction of the weight bar, and the weight bar is biased based on the movement of the wire runner A roll blind anti-winding device comprising: an urging unit that holds the weight bar at a position where the screen does not wind off.   2. The guide wire is inserted into a distal end portion of the wire runner, and the urging means is disposed between the proximal end portion of the wire runner and the weight bar in the weight bar. The roll blind roll prevention device according to claim.   A pair of the wire runners are movably supported at both ends of the weight bar, and the urging means is disposed between the base end of each wire runner and the weight bar. The roll blind roll prevention device according to claim 2.   A partition fixed to the urging means accommodating portion and the weight bar by inserting the guide wire into the tip end portion of the wire runner, and providing an urging means accommodating portion that moves integrally with the wire runner in the weight bar. The roll blind prevention device according to claim 1, wherein the biasing means is disposed between the roll blind and the plate.   A pair of wire runners are movably supported at both ends of the weight bar, and biasing means accommodating portions that move integrally with the wire runners are provided on both sides of the partition plate, and the both sides of the partition plate 5. A roll blind roll prevention device according to claim 4, further comprising an urging means.   The support bracket of the winding shaft is provided with a wire holder for holding the guide wire, and the surface of the wire holder facing the screen is provided with a hypotenuse that is inclined with respect to the winding deviation direction of the screen. The roll blind roll prevention device according to any one of claims 1 to 5. The screen is suspended from a winding shaft that is rotatably supported on the mounting surface, a weight bar is attached to the lower end of the screen, and the screen and the weight bar can be raised and lowered based on the rotation of the winding shaft, In a roll blind in which guide means for supporting the weight bar so as to be movable up and down are stretched on both sides in the longitudinal direction of the weight bar,
Guided means supported by the guide means so as to be movable up and down are supported at both ends of the weight bar so as to be movable in the longitudinal direction of the weight bar, and the weight bar is based on the movement of the guided means. A roll blind anti-winding device comprising a coil spring that is urged to hold the weight bar at a natural length at a position where no unwinding occurs on the screen.

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