JP2005023577A - Winding type screen device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent a screen from being wound to an erroneous direction on the winding axis with a simple structure and make the stopping position of the screen changeable to a desired position by making it possible to stop the operation of an operational member at an arbitrary position. <P>SOLUTION: The shaft cap 20 fixing a spring 24 to a bearing cap 14 is rotatably supported and an adjusting member 26 inserted in the spring 24 is rotatably supported. The piece 23 which is freely movable along the spring 24 is inserted in the groove 26a of the adjusting member 26, piece stoppers 24a, 24b setting the limit of the opening or closing position of a net 8 are provided at the end of the spring 24. By winding off or winding up the net 8 by a driving means 17 or the rotary operation of the adjusting member 26, the piece 23 is made movable along the groove 26a of the adjusting member 26 within the limit of the piece stoppers 24a, 24b. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to various types of winding screen devices such as a blindfold screen, a light shielding screen, a heat insulation screen, and a roll screen door for insect protection installed in a building opening.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, a take-up type screen device that operates an operating string to draw out or wind up a screen is generally well known without mentioning an example. In this type of screen device, generally, a pulley member connected to a winding shaft of the screen is rotated forward and backward by operating an operation member such as an operating string or a chain, thereby rotating the winding shaft, and feeding out the screen. Or it is taking up.
However, in this type of conventional screen device, the pulley member and the take-up shaft can normally be freely rotated in the forward and reverse directions by the operation member, so that the operation member is operated when the screen is fully extended. When the operation member is further operated without stopping, the winding shaft is wound in the wrong direction, that is, the screen is wound in the reverse direction. As a result, the screen is forcibly taken up and the screen may be damaged, and the screen device itself may be damaged.
[0003]
In addition, depending on the installation location of the screen device, the season, etc., it is desirable that the user appropriately adjust the stop position of the screen in order to adjust the lighting condition of the sunlight, the wind condition, etc. Then, in order to stop the screen at a desired position, the operation of the operation member cannot be automatically stopped at an arbitrary position. That is, in order for the user to stop the screen at the desired position, the screen device is opened and closed. Each time the operation is performed, it is necessary to finely operate the operation member to stop the screen at the position desired by the user. Depending on the place where the screen device is installed, the season, etc. It is not possible to easily adjust the degree of entry.
[0004]
[Problems to be solved by the invention]
In view of the above, the technical problem of the present invention is that a simple structure prevents the screen from being wound in the wrong direction on the winding shaft, that is, reversely wound, and allows the operation member to be operated at an arbitrary position. It is an object of the present invention to provide a winding screen device that can change the stop position of the screen to a user's desired position by enabling the stop.
[0005]
[Means for Solving the Problems]
In order to solve the above-mentioned problems, the present invention supports a winding shaft around which a screen is wound with a drive cap and a bearing cap provided at both ends of the screen box so that the winding shaft can rotate freely. In the take-up type screen device that allows the screen to be unwound and taken up by providing the drive means, the bearing cap in the screen box is fitted and fixed to one end of the take-up shaft, and the inner end thereof A shaft cap on which a coiled spring is fixed is rotatably supported, and an adjustment member inserted into the spring is rotatably supported by an external operation, and an axial groove is provided on the outer surface of the adjustment member. A piece that is movable along the coiled spring is inserted into the groove, and a screen is attached to the end of the spring. A piece stopper for setting the limit of the open position or the closed position is provided, and the piece is moved along the groove portion of the adjustment member by feeding or winding the screen by the operation of the driving means or by rotating the adjustment member. It is characterized in that it can move up to the above-mentioned piece stopper.
[0006]
In the winding screen device, it is appropriate to provide the bearing cap with an anti-rotation means for preventing the adjustment member from rotating due to the rotational force from the piece side. The means comprises a rotation preventing member that is detachably fitted to the bearing cap and has a contact surface that abuts against the peripheral surface of the polygonal head of the adjustment member when the adjustment cap is mounted. It can be configured to prevent rotation, and the piece can be a bead-like member loosely fitted on a coiled spring.
Furthermore, the drive means in the drive cap can be configured by rotatably supporting a pulley member around which an operation member for extending or winding the screen is wound.
[0007]
In the winding screen device, by rotating the adjustment member from the outside, the piece loosely fitted to the spring moves along the groove portion of the adjustment member with the piece stopper as a limit. Therefore, if the piece is moved to the limit stop on the open position side of the spring by operating the adjustment member in a state where the screen is stopped at an arbitrary open position, a desired value can be obtained when the screen is extended by the driving means. The screen stops in the open position and no further screen is drawn out. On the other hand, when the screen is stopped at an arbitrary closed position, if the piece is moved to the limit piece stop on the closed position side of the spring by operating the adjustment member, when the screen is wound by the driving means, The screen stops at the desired closed position and no further screen is taken up.
[0008]
In addition, the bearing cap is provided with a rotation preventing means for preventing the adjustment member from rotating due to the rotational force from the piece side, so that the piece is fixed to the end of the spring by feeding or winding the screen. Can be reliably prevented from transmitting the rotational force of the take-up shaft from the piece side to the adjustment member, and can thus be reliably stopped at the set open or closed position. .
[0009]
As described above, according to the winding screen device of the present invention, the screen can be prevented from being wound in the wrong direction on the winding shaft, that is, reversely wound with a simple structure, and the operation member can be operated. Can be stopped at an arbitrary position, and the stop position of the screen can be changed to a position desired by the user.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described in detail with reference to the drawings. FIGS. 1 to 5 show an embodiment in which the winding screen device of the present invention is applied to an insect screen.
As shown in FIG. 1, this insect screen has a screen box 2 attached along an upper frame member (not shown) of a building opening, and a winding shaft 4 that is rotatably supported inside the box 2. The insect net 8 that forms a screen wound around the winding shaft 4 and whose tip is led out from the slit 6 on the lower surface of the box 2, a bottom bar 10 attached to the tip of the net 8, and the box 2 A drive cap 16, which will be described later, is provided with a pair of left and right guide rails 12 that are vertically provided from both ends and that slidably guide the left and right ends of the net 8 and the bottom bar 10 when the net 8 is opened and closed. The net 8 can be drawn out and wound up by operating the operating string 18 constituting the driving means 17 provided in the above and rotating the winding shaft 4 forward and backward. To have.
[0011]
As shown in FIG. 1, the screen box 2 has bearing caps 14 and drive caps 16 attached to both ends thereof, and is projected from the surfaces of the bearing caps 14 and drive caps 16 facing the inside of the box 2. The winding shaft 4 is rotatably supported on the shaft support portions 14a and 16a by shaft caps 20 and 22 fitted to both ends of the winding shaft 4. Further, a slit for leading out the net 8 wound around the winding shaft 4 is provided on the lower surface of the box 2.
[0012]
The bearing cap 14 attached to one end (left end side in FIG. 1) of the box 2 is a shaft cap 20 fitted to one end (left end side in FIG. 1) of the winding shaft 4 as shown in FIGS. Is rotatably supported by the shaft support portion 14a, and a piece 23 for setting the limit of the open position or the closed position of the net 8 is freely movably fitted to the inner end of the shaft cap 20. The spring 24 is fixed (see FIG. 3). Further, at the ends of the spring 24 on the bearing cap 14 side and the drive cap 16 side, pieces stoppers 24a and 24b are formed by bending the portions in the axial direction of the winding shaft 4, respectively. When the piece 23 reaches the piece stop 24a, the movement of the piece 23 is stopped. An adjusting member 26, which will be described later, is rotatably supported by an external operation by inserting the shaft portion 26A into the shaft cap 20 and the spring 24 and exposing the head portion 26B from the bearing cap 14. ing. The piece 23 is preferably configured as a bead-shaped member as shown in FIG.
[0013]
As shown clearly in FIGS. 2 and 4, the adjusting member 26 has a substantially hexagonal head portion 26B having an operation portion 26b at the center thereof, and a side opposite to the operation portion 26b of the head portion 26B. A shaft portion 26A extending from the surface is provided, and a groove portion 26a is formed in the axial direction on the outer surface of the shaft portion 26A. The adjusting member 26 is attached to the spring 24 when the net 8 is extended or wound, or by rotating the operating portion 26b of the head 26B by an adjusting means 30 such as a driver (see FIG. 2). The loosely-fitted piece 23 is configured to be movable along the groove portion 26a with the piece stoppers 24a and 24b as limits (see FIG. 5). However, due to the relationship with the groove 26a, the piece is not necessarily movable to the stop. In addition, a piece stopper for setting the limit of movement of the piece 23 can be provided at the end of the groove 26a. Further, the bearing cap 14 is provided with a rotation preventing member 28 for preventing the adjusting member 26 from rotating as a rotation preventing means for preventing the adjusting member 26 from rotating due to the rotational force from the piece 23 side. The anti-rotation member 28 is fitted into a hole in the lower surface of the bearing cap 14 and abuts a contact surface 28a that abuts against a plurality of sides of the circumferential surface of the head portion 26B having a substantially hexagonal shape in the side view of the adjustment member 26. When the piece 23 reaches the piece stop 24a or 24b at the end of the spring 24 by the contact of the surface, the adjusting member 26 is rotated by the rotational force from the piece 23 side. It is to prevent. Reference numeral 29 denotes a set screw for fixing the rotation preventing member 28 to the bearing cap 14.
[0014]
On the other hand, the drive cap 16 attached to the right end of the box 2 includes drive means 17 for rotating the winding shaft 4 forward and backward. The driving means 17 is configured by rotatably supporting a pulley 32 around which an operation string 18 as an operation member for feeding or winding the net 8 is wound.
[0015]
One end of an insect repellent net 8 is attached to the winding shaft 4, and the net 8 is wound around the winding shaft 4. The net 8 is led out from the slit on the lower surface of the box 2, and a bottom bar 10 for opening / closing operation is attached to the tip of the net 8. The bottom bar 10 always holds the net 8 in a tensioned state when the net 8 is pulled out of the box 2, and has a weight that can be stretched over the opening of the building. The guide rail 12 is guided.
[0016]
In the winding screen device having the above-described configuration, the winding shaft 4 is rotated by the operation of the driving means 17 and the net 8 wound around the winding shaft 4 is fed or wound. The rotation is transmitted to the spring 24 provided on the shaft cap 20 that rotates together with the shaft 4. On the other hand, the shaft portion 26A of the adjusting member 26 fixed to the bearing cap 14 does not rotate with the winding shaft 4 even if the winding shaft 4 rotates. When the piece 23 fitted in the groove portion 26a of the shaft portion 26A moves in any direction in the groove portion 26a as the spring 24 rotates, and when it reaches the piece stop 24a or 24b at the end portion of the spring 24, Since the piece 23 cannot move, the winding shaft 4 is prevented from rotating. Therefore, the rotation limit of the winding shaft 4 can be set by adjusting the initial position of the piece 23 by the adjusting member 26.
[0017]
That is, in the winding screen device, the piece 23 loosely fitted to the spring 24 is adjusted by rotating the operation portion 26b of the adjustment member 26 from the outside by the adjustment means 30 such as a driver (see FIG. 2). The member 26 moves along the groove 26a of the shaft portion 26A with the above-mentioned piece stoppers 24a and 24b as a limit. Therefore, if the net 23 is stopped at an arbitrary open position (closed position) and the piece 23 is moved to the limit piece stop 24a on the open position side of the spring 24 by the operation of the adjustment member 26, the above operation is performed. When the net 8 is drawn out by the string 18, the net 8 stops at a desired open position, and the net 8 is not drawn any further. On the other hand, if the piece 23 is moved to the limit piece stop 24b on the closed position side of the spring 24 by the operation of the adjusting member 26, the net 8 is in the desired closed position when the net 8 is wound by the operation string 18. Stops and the net 8 is no longer wound.
[0018]
Further, since the bearing cap 14 is provided with a rotation preventing member 28 for preventing the adjusting member 26 from rotating due to the rotational force from the piece 23 side, the piece 23 is moved by the net 8 being drawn out or taken up. It is possible to reliably prevent the rotational force of the winding shaft 4 from being transmitted from the piece 23 side to the adjusting member 26 in a state where the end of the spring 24 is moved to the piece stop 24a or 24b. The net 8 can be reliably stopped at the set open position or closed position.
[0019]
Thus, according to the winding screen device of the present invention, the net 8 can be prevented from being wound around the winding shaft 4 in the wrong direction, that is, reversely wound, with a simple structure, and the driving means. 17, the operation of the operation string 18 can be stopped at an arbitrary position, and the stop position of the net 8 can be changed to a position desired by the user.
[0020]
【The invention's effect】
As described in detail above, according to the winding screen device of the present invention, the simple structure prevents the screen from being wound in the wrong direction on the winding shaft, that is, reverse winding, and the operation member. By making the operation stop at an arbitrary position, the stop position of the screen can be changed to a position desired by the user.
[Brief description of the drawings]
FIG. 1 is a partially broken front view of an embodiment of a winding screen device according to the present invention.
FIG. 2 is a partial side view of the same.
3A is a front view of a state in which a spring is fixed to a shaft cap, and FIG. 3B is a left side view of the same.
4A is a front view of an adjustment member, and FIG. 4B is a left side view of the adjustment member.
FIG. 5 is an enlarged cross-sectional view taken along line XX in FIG.
[Explanation of symbols]
2 Screen box 4 Winding shaft 8 Net 14 Bearing cap 16 Driving cap 17 Driving means 18 Operating string 20 and 22 Shaft cap 23 Frame 24 Spring 24a and 24b Frame stopper 26 Adjustment member 26a Groove portion 28 Anti-rotation member 32 Pulley

Claims (5)

The winding shaft around which the screen is wound is rotatably supported by drive caps and bearing caps provided at both ends of the screen box, and driving means for rotating the winding shaft in the forward and reverse directions is provided in the drive cap. In the take-up type screen device that enables feeding and winding,
A bearing cap in the screen box is fitted and fixed to one end of the winding shaft, and a shaft cap having a coiled spring fixed to its inner end is rotatably supported, and an adjustment member fitted to the spring is externally attached. It is supported to be rotatable by the operation from
An axial groove is provided on the outer surface of the adjustment member, and a piece that is movable along the coiled spring is fitted into the groove, and the screen is opened or closed at the end of the spring or the end of the groove. Set a stop for setting the limit of the position,
The piece can be moved along the groove portion of the adjustment member up to the stop of the piece by turning out or winding the screen by the operation of the driving means or by rotating the adjustment member.
A roll-up screen device characterized by that. 2. The winding screen device according to claim 1, wherein the bearing cap is provided with a rotation preventing means for preventing the adjustment member from rotating due to a rotational force from the piece side. The rotation prevention means comprises a rotation prevention member that is detachably fitted to the bearing cap and has a contact surface that abuts against the peripheral surface of the polygonal head of the adjustment member. The winding screen device according to claim 2, wherein the adjustment member is prevented from rotating. The winding screen device according to claim 1 or 2, wherein the piece is a bead-like member loosely fitted on a coiled spring. 5. The drive means in the drive cap is configured by rotatably supporting a pulley member around which an operation member for extending or winding the screen is wound. The winding type screen apparatus as described.

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