JP4989914B2 - Roller blind stopper device - Google Patents

Description

  The present invention relates to a stopper device for setting an upper limit position of a weight bar of a roll blind.

  The roll blind is supported by the screen suspended from a winding shaft that is rotatably supported on the mounting surface. The screen can be moved up and down by rotating the winding shaft with an operating device to wind or unwind the screen. is there.

  FIG. 11 shows a roll blind that winds up a screen by using a biasing force of a torsion coil spring disposed in a winding shaft. In the roll blind, a frame 1 is fixed to a mounting surface 3 via a mounting bracket 2, and a winding shaft 5 is rotatably supported by side brackets 4 attached to both ends of the frame 1.

  A screen 6 is wound around the winding shaft 5, and a weight bar 7 is attached to the lower end of the screen 6. When the winding shaft 5 is rotated in the screen winding direction by the urging force of the torsion coil spring disposed in the winding shaft 5, the weight bar 7 winds with the frame 1 as shown in FIG. It rises until it is pinched between the screen 6 wound around the take-up shaft 5. That is, the position where the weight bar 7 is sandwiched between the frame 1 and the winding shaft 5 is the upper limit position of the weight bar 7.

A damper member such as a rubber material is attached to the side surface of the weight bar 7 so as to reduce a collision sound when coming into contact with the frame 1.
Patent Document 1 discloses a roll blind provided with a correction member that regulates the upper limit position of the weight bar directly below the winding shaft.
JP 11-247556 A

  In the roll blind as described above, the winding diameter of the screen 6 around the winding shaft 5 increases as the lifting stroke of the screen 6 increases. Then, when the weight bar 7 reaches the upper limit, it may not contact the frame 1 and may collide with the mounting bracket 2 or the mounting surface 3 to generate noise, or damage the mounting bracket 2 or the mounting surface 3. .

  Further, when the winding shaft 5 is rotated at a high speed by the urging force of the torsion coil spring and the screen 6 is wound up vigorously, the weight bar 7 collides with the mounting bracket 2 or the mounting surface 3.

Such a problem may also occur in a roll blind that lifts and lowers the screen by operating the operation chain.
In the correction member described in Patent Document 1, although the upper limit position of the weight bar can be regulated directly below the winding shaft, it cannot cope with the increase in the winding diameter of the winding shaft, and the winding diameter increases. When doing so, it is necessary to prepare separate parts. Moreover, since the correction member is exposed at both ends of the winding shaft, it is not preferable in view of aesthetics.

  An object of the present invention is to provide a stopper device that can cope with a change in the winding diameter of the screen while reliably regulating the upper limit position of the weight bar.

  In the roll blind provided with the stopper device which controls the upper limit position of the weight bar attached to the lower end of the screen by winding or unwinding the screen on the winding shaft to raise and lower the screen. The apparatus is provided with a stopper member that restricts the upper limit of the weight bar in the vicinity of the winding shaft, and the stopper member can be moved following the winding diameter of the winding shaft.

Further , the stopper member is supported by a side bracket that rotatably supports the winding shaft so as to be movable in the front-rear direction, the stopper member is urged forward by an urging means, and a rear end of the stopper member A winding diameter detecting piece for detecting the winding diameter was provided.

According to claim 2, wherein the winding diameter detection piece has a rear end portion of the stopper member is bent toward the center of the winding shaft to allow sliding contact with the screen to be wound on the winding shaft.
According to a third aspect of the present invention, the stopper member is movably supported on a bracket shaft fixed to the side bracket, and the biasing means is a coil spring that biases the stopper member with the bracket shaft as a fulcrum.

According to a fourth aspect of the present invention, a cap that contacts the stopper member is attached to an end of the weight bar, and the cap is formed of a soft material.
In Claim 5 , the said stopper apparatus was provided in the both ends of the said winding shaft.

According to claim 6, to lift the screen back winding or winding a screen winding shaft, in a roller blind provided with a stopper device for regulating the upper limit position of the weight bar is attached to the lower end of the screen, the stopper The apparatus is provided with a stopper member that restricts the upper limit of the weight bar in the vicinity of the winding shaft, the stopper member can be moved following the winding diameter of the winding shaft, and the winding shaft is rotated on a frame. A side bracket that can be supported is attached, and the stopper member is movably supported at one central portion in the longitudinal direction of the winding shaft with respect to the frame, and is supported at the rear end of the stopper member. A winding diameter detection piece was provided, and the stopper member was urged by the urging means so that the winding diameter detection piece slidably contacted with the screen wound around the winding shaft.
The roll blind having a stopper device for restricting an upper limit position of a weight bar attached to a lower end of the screen by winding or unwinding the screen on a winding shaft to raise and lower the screen. The apparatus is provided with a stopper member that restricts the upper limit of the weight bar in the vicinity of the winding shaft, the stopper member can be moved following the winding diameter of the winding shaft, and the winding shaft can be rotated. The stopper member is supported at one central portion in the longitudinal direction of the winding shaft so as to be movable in the front-rear direction with respect to the mounting surface to which the supporting side bracket is fixed, and a winding diameter detecting piece is provided at the rear end of the stopper member The stopper member was urged by the urging means so that the winding diameter detecting piece was in sliding contact with the screen wound around the winding shaft.

  ADVANTAGE OF THE INVENTION According to this invention, the stopper apparatus which can respond also to the change of the winding diameter of a screen can be provided, controlling the upper limit position of a weight bar reliably.

(First embodiment)
A first embodiment of the present invention will be described below with reference to the drawings. In the roll blind shown in FIGS. 1 and 2, side brackets 12 are attached to both ends of a frame 11, and a winding shaft 13 is rotatably supported between the side brackets 12. The frame 11 is attached to the mounting surface 15 via the mounting bracket 14.

  A screen 16 is wound around the winding shaft 13, and a weight bar 17 is attached to the lower end of the screen 16 that hangs down from the winding shaft 13. A pull cord 18 is suspended from the middle portion in the longitudinal direction of the weight bar 17. Caps 17 a made of a soft material such as rubber are fitted to both ends of the weight bar 17.

  At both end sides of the take-up shaft 13, stoppers 19 for restricting the upper limit position of the weight bar 17 are formed on the both side brackets 12. As shown in FIG. 4, the stopper device 19 includes a bracket shaft 20 fixed to the side bracket 12, and a stopper member 21 supported so as to be movable in the front-rear direction, that is, in the left-right direction in FIG. The coil spring 22 urges the stopper member 21 toward the rear of the winding shaft 13.

  The bracket shaft 20 has horizontal sides 23a and 23b formed by cutting the upper and lower portions of the disc in the horizontal direction. The stopper member 21 is formed with a fitting hole 24 in which the bracket shaft 20 can be fitted at the center of a plate-like member. The fitting hole 24 has a shape obtained by extending the shape of the bracket shaft 20 in the front-rear direction, and linear portions 25a and 25b sliding with the horizontal sides 23a and 23b are formed at the upper and lower edges thereof. ing. Therefore, the stopper member 21 is supported so as to be movable in the front-rear direction in a state in which the straight portions 25 a and 25 b are in sliding contact with the horizontal sides 23 a and 23 b of the bracket shaft 20.

  A winding diameter detection in which the rear end portion of the stopper member 21 is bent at a right angle toward the central portion of the winding shaft 13 so as to be slidable on both sides of the screen 16 wound around the winding shaft 13. A piece 26 is formed. The winding diameter detection piece 26 is positioned on the lifting locus of the cap 17a at both ends of the weight bar 17.

  In addition, a concave portion 27 is formed in the stopper member 21 at a position facing the front end portion of the bracket shaft 20, and a coil spring 22 that contacts the front end edge of the bracket shaft 20 is disposed in the concave portion 27. Yes. Therefore, the stopper member 21 is always urged forward, that is, in the direction of arrow A shown in FIG. 4 by the urging force in the extending direction of the coil spring 22 with the bracket shaft 20 as a fulcrum.

  Inside the winding shaft 13, a torsion coil spring that applies a rotational force in the screen winding direction to the winding shaft 13, and the screen is suspended and supported at a desired position against the urging force of the torsion coil spring. A known clutch device is incorporated.

  Next, the operation of the roll blind configured as described above will be described. As shown in FIG. 1, when the screen 16 is lowered to the lower limit, the screen 16 is almost unwound from the winding shaft 13 as shown in FIG. The stopper member 21 is moved forward by the urging force of the coil spring 22 until the winding diameter detection piece 26 contacts the screen 16 on the winding shaft 13.

  From this state, when the winding shaft 13 is rotated by the urging force of the torsion coil spring and the screen 16 is wound around the winding shaft 13, the screen 16 rises and the winding diameter of the winding shaft 13 increases. Then, the stopper member 21 slidably contacting the screen 16 at both ends of the winding shaft 13 moves backward against the urging force of the coil spring 22 as the winding diameter increases.

  As shown in FIGS. 3 and 5, when the screen 16 is substantially wound around the winding shaft 13, the caps 17a at both ends of the weight bar 17 abut against the stopper member 21 to prevent further elevation. The

  On the other hand, if the pull cord 18 is operated and the screen 16 is pulled down, the screen 16 is rewound from the winding shaft 13 and the winding diameter is reduced. Then, the stopper member 21 moves forward by the biasing force of the coil spring 22.

In the roll blind configured as described above, the following operational effects can be obtained.
(1) With the stopper member 21, the upper limit position of the weight bar 17 can be restricted to the lower position of the winding shaft 13 regardless of the winding diameter of the winding shaft 13. Therefore, the collision between the weight bar 17 and the mounting bracket 14 or the mounting surface 15 can be prevented.
(2) The stopper member 21 can be moved back and forth according to the winding diameter of the winding shaft 13. Therefore, the common stopper device 19 can be used for roll blinds having different winding diameters.
(3) The winding diameter detection piece 26 of the stopper member 21 is located behind the winding shaft 13. Therefore, since the stopper device 19 is not exposed to the indoor side except for the front end portion of the stopper member 21, it is possible to prevent the appearance from being deteriorated.
(4) Since the cap 17a made of a rubber material comes into contact with the stopper member 21, the collision noise between the cap 17a and the stopper member 21 can be reduced.
(5) Since both end portions of the weight bar 17 are brought into contact with the stopper member 21, the upper limit position of the weight bar 17 can be stably regulated.
(Second embodiment)
6 to 8 show a second embodiment. In this embodiment, the stopper member is provided in the central portion in the longitudinal direction of the winding shaft. The same components as those in the first embodiment will be described with the same reference numerals.

  As shown in FIG. 6, a stopper member 31 is attached to the longitudinal center of the frame 11. The stopper member 31 is composed of a plate material in which an upper piece 32 and a winding diameter detection piece 33 are bent at a right angle, the upper piece 32 is supported on the frame 11, and the winding diameter detection piece 33 is disposed on the front side of the winding shaft 13. It is drooping.

  In the center portion of the upper piece 32, a long rectangular locking hole 34 is formed in the front-rear direction. Then, as shown in FIG. 8, the locking piece 36 of the locking tool 35 is inserted from below the frame 11 to above the locking hole 34, and the locking tool 35 is rotated, as shown in FIG. 6. In addition, the locking piece 36 is held by the upper piece 32. Therefore, the stopper member 31 is supported so as not to move in the longitudinal direction of the frame 11, and is movable in the front-rear direction within the range of the front-rear length of the locking hole 34.

  The stopper member 31 is always urged forward (inside the room), that is, leftward in FIG. 7 by the urging force of a coil spring (not shown) with the frame 11 as a fulcrum. Therefore, as shown in FIG. 8, the winding diameter detection piece 33 is in contact with the screen 16 wound around the winding shaft 13.

At the lower end of the winding diameter detection piece 33, a guide piece 37 is formed that branches backward from the winding diameter detection piece 33 and projects downward in a bowl shape.
A protrusion 39 extending upward is formed at the rear part of the weight bar 38 attached to the lower end of the screen 16, and a groove 40 is formed between the protrusion 39 and the main body portion of the weight bar 38.

  As shown in FIG. 8, when the weight bar 38 is pulled up to the upper limit, the protrusion 39 is guided between the winding diameter detection piece 33 and the guide piece 37, and the lower end of the winding diameter detection piece 33 is engaged. It is supposed to be.

  In the roll blind configured as described above, as shown in FIG. 7, when the screen 16 is rewound, the stopper member 31 is moved forward by the biasing force of the coil spring.

  From this state, when the screen 16 is wound around the winding shaft 13 and the winding diameter of the winding shaft 13 increases, the stopper member 31 sequentially moves backward. As shown in FIG. 8, when the weight bar 38 is pulled up to the vicinity of the winding shaft 13, the lower end of the winding diameter detection piece 33 of the stopper member 31 engages with the groove portion 40, so that the weight bar 38 is more than that of the weight bar 38. The rise is prevented.

In the roll blind configured as described above, the following operational effects can be obtained.
(1) With the stopper member 31, the upper limit position of the weight bar 38 can be restricted to the lower position of the winding shaft 13 regardless of the winding diameter of the winding shaft 13. Therefore, the collision between the weight bar 38 and the mounting bracket 14 or the mounting surface 15 can be prevented.
(2) The stopper member 31 can be moved back and forth according to the winding diameter of the winding shaft 13. Therefore, the common stopper member 31 can be used for roll blinds having different winding diameters.
(3) The winding diameter detection piece 33 of the stopper member 31 is located behind the winding shaft 13. Accordingly, since the stopper member 31 is not exposed to the indoor side, it is possible to prevent a decrease in aesthetic appearance.
(4) The upper limit position of the weight bar 38 can be regulated by the stopper member 31 positioned at one place in the longitudinal center of the winding shaft 13. Therefore, the number of parts of the stopper device can be reduced as compared with the first embodiment.
(Third embodiment)
9 and 10 show a third embodiment. In this embodiment, a stopper 41 that supports the stopper member 31 so as to be movable back and forth is fixed to the mounting surface 15.

  As shown in FIG. 9, the side bracket 42 that rotatably supports the winding shaft 13 is fixed to the mounting surface 15. Further, a locking member 41 that supports the stopper member 31 so as to be movable back and forth is also fixed to the mounting surface 15 with a mounting screw 43. The stopper member 31 has the same configuration as that of the second embodiment.

With such a configuration, the same effect as that of the second embodiment can be obtained in the roll blind that directly fixes the side bracket 12 to the mounting surface.
You may implement the said embodiment in the following aspects.
-The stopper apparatus of each said embodiment can also be used for the roller blind which raises / lowers a screen by rotating a winding shaft by operation of the operation chain suspended from the end of a winding shaft.
In the first embodiment, the biasing means that biases the stopper member may be disposed at a position other than between the bracket shaft and the stopper member.
-In 1st embodiment, you may provide a stopper apparatus only in the one end part of a winding shaft.

It is a front view which shows the roll blind of 1st embodiment. It is a side view which shows the roll blind of 1st embodiment. It is a side view which shows the state which pulled up the screen to the upper limit. It is a side view which shows operation | movement of a stopper apparatus. It is a side view which shows operation | movement of a stopper apparatus. It is a perspective view which shows 2nd embodiment. It is a side view which shows 2nd embodiment. It is sectional drawing which shows 2nd embodiment. It is a perspective view which shows 3rd embodiment. It is a side view which shows 3rd embodiment. It is a side view which shows a prior art example.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 12, 42 ... Side bracket, 13 ... Winding shaft, 16 ... Screen, 17, 38 ... Weight bar, 19 ... Stopper device, 21, 31 ... Stopper member, 22 ... Biasing means (coil spring), 26, 33 ... Roll diameter detection piece.

Claims (7)

In a roll blind equipped with a stopper device that winds or unwinds the screen on a winding shaft to raise and lower the screen and regulates the upper limit position of the weight bar attached to the lower end of the screen,
The stopper device is provided with a stopper member that regulates the upper limit of the weight bar in the vicinity of the winding shaft, and the stopper member can be moved following the winding diameter of the winding shaft ,
The stopper member is supported by a side bracket that rotatably supports the winding shaft, and a winding diameter detection piece is provided at a rear end of the stopper member, and the winding diameter detection piece is attached to the winding shaft. A roller blind stopper device , wherein the stopper member is urged by an urging means so as to be in sliding contact with the wound screen . The winding diameter detecting piece is configured such that a rear end portion of the stopper member is bent toward a central portion of the winding shaft and is slidable on a screen wound around the winding shaft. 1 roller blind stopper system according. The stopper member is movably supported by a bracket shaft fixed to the side bracket, and the biasing means is constituted by a coil spring that biases the stopper member with the bracket shaft as a fulcrum. The roller blind stopper device according to 1 or 2 . The roll blind according to any one of claims 1 to 3 , wherein a cap that contacts the stopper member is attached to an end of the weight bar, and the cap is formed of a soft material. Stopper device. The roller blind stopper device according to any one of claims 1 to 4 , wherein the stopper device is provided at both ends of the winding shaft.   In a roll blind equipped with a stopper device that winds or unwinds the screen on a winding shaft to raise and lower the screen and regulates the upper limit position of the weight bar attached to the lower end of the screen,
  The stopper device is provided with a stopper member that regulates the upper limit of the weight bar in the vicinity of the winding shaft, and the stopper member can be moved following the winding diameter of the winding shaft,
  A side bracket that rotatably supports the winding shaft is attached to a frame, and the stopper member is supported on the frame so as to be movable in the front-rear direction at one central portion in the longitudinal direction of the winding shaft. A winding diameter detection piece is provided at the rear end of the stopper member, and the stopper member is biased by a biasing means so that the winding diameter detection piece is in sliding contact with the screen wound around the winding shaft. Roller blind stopper device.   In a roll blind equipped with a stopper device that winds or unwinds the screen on a winding shaft to raise and lower the screen and regulates the upper limit position of the weight bar attached to the lower end of the screen,
  The stopper device is provided with a stopper member that regulates the upper limit of the weight bar in the vicinity of the winding shaft, and the stopper member can be moved following the winding diameter of the winding shaft,
  The stopper member is movably supported at one central portion in the longitudinal direction of the winding shaft with respect to the mounting surface to which the side bracket that rotatably supports the winding shaft is fixed, and the stopper member A roll blind characterized in that a roll diameter detecting piece is provided at the rear end, and the stopper member is urged by an urging means so that the roll diameter detecting piece is in sliding contact with a screen wound around a winding shaft. Stopper device.

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