JP2008184853A - Roller blind screen lifting device - Google Patents

Abstract

The present invention provides a screen raising / lowering device for a roll blind which has both a function for raising and lowering a screen and a function for selecting a cloth for the screen, and can easily perform a cloth selecting operation.
A screen is suspended and supported from an upper winding shaft 2 that is rotatably supported on a mounting surface, and the screen can be wound or unwound by a rotating operation of the upper winding shaft 2 so as to be lifted and lowered. Is composed of a plurality of different fabrics 4 and 5 connected to each other so that the lower end of the screen can be wound around the lower take-up shaft 6, and the lower take-up shaft 6 is suspended from the lower end of the screen. The lower winding shaft 6 automatically winds the screen according to the rewinding amount from the upper winding shaft when the lower winding shaft 6 is lowered to the lower limit position based on the rewinding of the screen from the upper winding shaft 2. A winding device 12 was provided.
[Selection] Figure 5

Description

  The present invention relates to a roll blind that moves up and down a screen formed by connecting a plurality of types of fabrics.

  In the roll blind, the screen is suspended from a winding shaft that is rotatably supported on the mounting surface. When the winding shaft is rotated in the screen winding direction, the screen is pulled up, and the winding shaft is rotated in the screen unwinding direction. If you do, the screen will go down.

  As one type of such a roll blind, for example, a screen is formed by connecting a second fabric having light shielding properties and a second fabric having translucency such as lace fabric, and the screen is wound on the upper part. There is one that hangs down from the take-up shaft and that allows the lower end of the screen to be taken up around the lower take-up shaft.

  In the roll blind having such a configuration, when the upper winding shaft is rotated and the screen is rewound, the lower winding shaft is lowered. When the lower winding shaft is lowered to the lower limit, the screen rewound from the upper winding shaft can be wound on the lower winding shaft. By adjusting the screen winding amount at the lower winding shaft, the screen stretched between the two winding shafts can be selected from the first or second fabric.

  Patent Document 1 discloses a roll-up door that can select either a film screen or a mesh screen and that can open both the film screen and the mesh screen.

Patent Document 2 discloses a light-shielding curtain that unwinds and opens and closes a curtain material from a plurality of cylindrical winding cylinders that move along a guide groove, or winds the curtain material around the cylindrical winding cylinder by the biasing force of a coil spring. Has been.
Japanese Utility Model Publication No. 64-2932 Japanese Utility Model Publication No. 58-13396

  In the above-mentioned roll blind, in order to select the fabric stretched between the upper winding shaft and the lower winding shaft, it is necessary to rotate the upper winding shaft or the lower winding shaft electrically or manually, respectively. There is. Therefore, there is a problem that the rotating operation of each winding shaft becomes complicated.

  In the hoisting door described in Patent Document 1, when either a film screen or a mesh screen is selected, the hoisting drum and the take-up shaft are respectively rotated and driven in the same manner as the roll blind as described above. There is a need to.

In the light-shielding curtain described in Patent Document 2, a configuration for selecting a plurality of types of fabrics is not disclosed.
SUMMARY OF THE INVENTION An object of the present invention is to provide a screen raising / lowering device for a roll blind that has both a function for raising and lowering a screen and a function for selecting a cloth for the screen, and which can easily perform a cloth selecting operation.

  According to the first aspect of the present invention, the screen is suspended and supported from the upper winding shaft that is rotatably supported on the mounting surface, and the screen can be wound up or down by rotating the upper winding shaft so that the screen can be moved up and down. Is configured by connecting a plurality of different fabrics, and in the roll blind that enables the lower end of the screen to be wound on the lower winding shaft, the lower winding shaft is suspended and supported on the lower end of the screen, Screen lowering shaft that automatically winds the screen in accordance with the amount of rewinding from the upper winding shaft when lowered to the lower limit position based on the screen rewinding from the upper winding shaft. Equipped with equipment.

  According to a second aspect of the present invention, the screen winding device includes a stopper that supports a weight of the lower winding shaft at a lower limit position of the lower winding shaft, and when the lower winding shaft is supported by the stopper device, Driving means for rotating the lower winding shaft in the screen winding direction.

According to a third aspect of the present invention, the drive means is a spring motor disposed in the lower winding shaft.
The lower end of the lower winding shaft is rotatably supported by a support plate, the support plate is supported so as to be movable along the guide rail and is not rotatable, and the stopper is provided in the guide rail. One end of a torsion coil spring constituting the spring motor is supported on the support plate, and the other end of the torsion coil spring is attached to the lower winding shaft, and the urging force of the spring motor is The strength is balanced with the weight of the handle.

  ADVANTAGE OF THE INVENTION According to this invention, the screen raising / lowering apparatus of the roll blind which has the function to raise / lower a screen and the function to select the cloth | dough of a screen, and can perform cloth selection operation easily can be provided.

(First embodiment)
A first embodiment of the present invention will be described below with reference to the drawings. In the roll blind shown in FIG. 1, the upper winding shaft 2 is rotatably supported between a pair of mounting brackets 1a and 1b fixed to the mounting surface, and the upper end portion of the screen 3 is wound around the upper winding shaft 2. Has been.

  A motor is built in the upper winding shaft 2, and the motor case is supported by one mounting bracket 1a. When the motor is activated based on the operation of an operation switch (not shown), the upper winding shaft 2 is rotated in the screen winding direction or the screen rewinding direction.

  The screen 3 suspended from the upper winding shaft 2 is formed by connecting a first fabric 4 having light shielding properties and a second fabric 5 having translucency such as a lace fabric. The fabric 4 is connected below the second fabric 5.

Accordingly, when the screen 3 is rewound, the first fabric 4 is first rewound and then the second fabric 5 is rewound.
The lower part of the screen 3 is wound around a lower winding shaft 6, and both ends of the lower winding shaft 6 are rotatably supported by a support plate 7, and the support plate 7 is erected on both sides of the screen 3. The guide rail 8 is supported so as to be movable and non-rotatable with respect to the guide rail 8.

  As shown in FIG. 3, the guide rail 8 is formed in a groove shape that opens toward the screen 3, and the support plate 7 has first and second rollers 9 a that move in the guide rail 8. 9b are rotatably supported.

  The first roller 9 a rolls up and down while engaging with ribs 10 provided opposite to both sides of the opening of the guide rail 8. As shown in FIGS. 3 and 4, the second roller 9 b is positioned above the first roller 9 a and rolls up and down in the groove portion 11 positioned inside the rib 10.

  Accordingly, the support plate 7 is supported so as to be movable in the vertical direction along the guide rail 8 and is supported so as not to rotate relative to the guide rail 8. Further, a stopper 12 is attached to the lower end portion of the guide rail 8 so as to contact the first roller 9a and set the lower limit position thereof.

  A spring motor 13 composed of a torsion coil spring is disposed in the lower winding shaft 6 as a screen winding device or a driving means. As shown in FIG. 2, one end of the spring motor 13 is supported by a shaft portion 14 that extends from the support plate 7 into the lower winding shaft 6 and rotatably supports the lower winding shaft 6, and the other end is It is fixed to the lower winding shaft 6 via the mounting drum 15. The spring motor 13 always urges the lower winding shaft 6 in the screen winding direction.

  In the state where the lower winding shaft 6 is suspended and supported by the screen 3, the weight of the lower winding shaft 6 and the urging force of the spring motor 13 are balanced to prevent the lower winding shaft 6 from rotating. Yes. When the first roller 9 a is lowered to a position where it abuts against the stopper 12, the weight of the lower winding shaft 6 is supported by the stopper 12. Based on this, an attempt is made to rotate the screen 3 in the winding direction.

This operation is limited to the case where the upper winding shaft 2 is rewinding the screen 3, and the upper winding shaft 2 is not forcibly rotated by the urging force of the spring motor 13.
Next, the operation of the roll blind configured as described above will be described. FIG. 5A shows a state where the lower winding shaft 6 is pulled up to the vicinity of the upper winding shaft 2. In this state, the first dough 4 is suspended and supported from the upper winding shaft 2.

  From this state, when the upper winding shaft 2 is rotated in the screen unwinding direction, as shown in FIG. 5 (b), the first material 4 is unwound and the lower winding shaft 6 is lowered, and then the second winding shaft 6 is lowered. The second dough 5 is rewound.

  Then, as shown in FIG. 5C, when the lower winding shaft 6 is lowered until it is supported by the stopper 12, the upper portion of the screen 3 becomes the second fabric 5, and the lower portion of the screen 3 is the first. The dough 4 becomes.

  When the upper winding shaft 2 is further rotated in the screen rewinding direction from the state shown in FIG. 5C, the lower winding shaft 6 is rotated by the urging force of the spring motor 13, and the upper winding shaft 2 is wound from the upper winding shaft 2. The returned screen 3 is wound on the lower winding shaft 6.

And as shown in FIG.5 (d), when all the 1st material | dough 4 is wound up by the lower winding shaft 6, between the upper winding shaft 2 and the lower winding shaft 6, the 2nd material | dough 5 will be shown. Is in a stretched state.
On the other hand, when the screen 3 is wound around the upper winding shaft 2 from the state shown in FIG. 5D, the lower winding shaft 6 is rotated and the screen 3 is rewound. At this time, the spring motor 13 is stored in the lower winding shaft 6.

When the entire screen 3 is rewound from the lower winding shaft 6, the lower winding shaft 6 is pulled up as shown in FIG.
In the roll blind configured as described above, the following operational effects can be obtained.
(1) By rotating the upper winding shaft 2 and rewinding or winding the screen 3, the lower winding shaft 6 can be moved up and down in a range until the lower winding shaft 6 contacts the stopper 12. it can. Therefore, the screen 3 can be opened and closed in the same manner as a normal roll blind.
(2) When the lower winding shaft 6 is lowered to the lower limit position where the lower winding shaft 6 comes into contact with the stopper 12, the upper portion of the screen 3 can be the second fabric 5 and the lower portion of the screen 3 can be the first fabric 4. Therefore, the lower part of the screen 3 can be shielded and soft light can be taken from the upper part. When the lower winding shaft 6 reaches the lower limit position, the length of the first fabric 4 is set so that the second fabric 5 is not yet rewound and the entire screen 3 becomes the first fabric 4. May be.
(3) If the screen 3 is rewound from the upper winding shaft 2 with the lower winding shaft 6 reaching the lower limit, the screen 3 corresponding to the unwinding amount is automatically wound on the lower winding shaft 6. . Therefore, the screen fabric stretched between the upper winding shaft 2 and the lower winding shaft 6 can be selected by the rewinding operation of the upper winding shaft 2, and the ratio of the first fabric 4 and the second fabric 5 can be selected. Can be adjusted.
(4) If the screen 3 is wound around the upper winding shaft 2 with the lower winding shaft 6 reaching the lower limit, the screen 3 corresponding to the winding amount is rewound from the lower winding shaft 6. By this rewinding operation, the spring motor 13 in the lower winding shaft 6 can be stored.

You may implement the said embodiment in the following aspects.
-You may comprise the screen 3 by connecting 3 or more types of fabrics.
-The cloth may be a cloth having a different color in addition to the difference in translucency.
-You may operate the upper winding shaft 2 manually.
The fabric of the screen 3 may be a suitable material by using this roll blind in a building airflow system.

It is a front view which shows the roll blind of one Embodiment. It is a partially broken front view which shows a lower winding shaft. It is a top view which shows the 1st and 2nd roller. It is a front view which shows the 1st and 2nd roller. (A)-(d) is a perspective view which shows operation | movement of the roll blind of one Embodiment.

Explanation of symbols

  2 ... Upper winding shaft, 3 ... Screen, 4 ... First fabric, 5 ... Second fabric, 6 ... Lower winding shaft, 12 ... Screen winding device (stopper), 13 ... Screen winding device (spring) motor).

Claims (4)

The screen is suspended from and supported by an upper winding shaft that is rotatably supported on the mounting surface, and the screen can be wound or unwound by rotating the upper winding shaft, and the screen is of a plurality of different types. In the roll blind that is configured by connecting the dough, the lower end of the screen can be wound around the lower winding shaft,
The lower winding shaft is suspended and supported at the lower end of the screen, and when the lower winding shaft is lowered to the lower limit position based on the rewinding of the screen from the upper winding shaft, A screen lifting device for a roll blind, comprising a screen winding device for automatically winding the screen in accordance with the amount of rewinding. The screen winding device includes:
A stopper that supports the weight of the lower winding shaft at the lower limit position of the lower winding shaft;
2. The screen lifting device for a roll blind according to claim 1, further comprising driving means for rotating the lower winding shaft in the screen winding direction when the lower winding shaft is supported by the stopper.   3. The screen lifting device for a roll blind according to claim 2, wherein the driving means is constituted by a spring motor disposed in the lower winding shaft.   Both ends of the lower winding shaft are rotatably supported by a support plate, the support plate is supported so as to be movable and non-rotatable along the guide rail, the stopper is provided in the guide rail, and the spring One end of a torsion coil spring constituting the motor is supported on the support plate, and the other end of the torsion coil spring is attached to the lower winding shaft. The biasing force of the spring motor is based on the weight of the lower winding shaft. 4. The screen lifting device for a roll blind according to claim 3, wherein the strength is balanced.

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