JP2999685B2 - Roll screen device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a roll screen device in which a screen can be opened and closed by rotation of a winding shaft, such as a roll type insect screen or a blind.

[0002]

2. Description of the Related Art In a roll type screen door which is a kind of a roll screen device, a retaining piece is provided on a side of a screen and is engaged with guide rails provided on both sides of the screen.
What guided the side edge of the screen slidably,
Conventionally, as disclosed in Japanese Utility Model Publication No. 52-41729. In this roll type screen door, by making the both ends of the winding shaft of the screen small in diameter, an escape margin is formed when the retaining pieces overlap, and the winding diameter at the side end of the screen becomes enormous. Restrained.

[0003] However, this type of roll screen door is
Even if the above-mentioned escape allowance is provided, there is a possibility that the winding diameter of the side end portion where the stopper pieces are arranged may be increased due to the polymerization of the stopper pieces at the time of winding the screen. However, even if they do not polymerize, each retaining piece only comes into contact with the screen surface wound first or second with respect to the winding shaft, and the winding diameter of the screen becomes considerable depending on the thickness of the retaining piece. As a result, there is a possibility that the winding diameter becomes larger than the above clearance.

In order to solve such a problem, for example, in a roll screen device disclosed in Japanese Utility Model Application Laid-Open No. 58-64796, extension pieces are provided on both side edges of the screen to extend sideways. A retaining piece is provided on one side, and the retaining piece is engaged with guide rails arranged on both sides of the screen, and the outer end of the winding shaft of the screen is provided with a relief allowance for the same retaining piece as in the conventional example. Has formed.

[0005] In the roll screen device having the above-mentioned extension piece, the extension piece has a large degree of freedom such as bending, so that the retaining piece can be efficiently accommodated as an escape margin. Due to the weight or the like, the retaining piece cannot be stably fitted to the guide rail, and as a result, there is a possibility that stable guiding by the guide rail becomes difficult. In addition, since a specially shaped guide tape provided with an extension piece on the side is separately required to attach the retaining piece, there is also a problem that extra cost is required for that.

[0006]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a roll screen device such as the above-mentioned roll type screen door, in which when the screen is wound up, the locking diameter of the screen increases due to polymerization of the retaining pieces. It is an object of the present invention to provide a roll screen device that can prevent such a problem and can manufacture such a roll screen device easily, easily and inexpensively.

[0007]

In order to solve the above-mentioned problems, the present invention provides a screen which is wound on a take-up shaft and can be opened and closed, a bottom bar attached to a tip of the screen, A guide rail for slidably guiding a side end of the screen, and the guide rail includes an inner rail with a slit in the main rail, the end of which is engaged with the screen in a locking state. In the roll screen device, a locking piece made of synthetic resin, which is arranged along both side edges of the screen and slidably engages with the slit of the inner rail, is provided with a locking head and a locking head. And a protruding welding leg, the head of which is projected inside the screen when the screen is wound around the winding shaft, and the leg of the retaining piece is screwed. On the opposite side of the screen, it was attached to the screen so as not to substantially protrude from the screen due to heat welding, and the retaining pieces at both ends of the screen were attached at positions where they did not overlap with the retaining pieces on the screen wound immediately before. It is characterized by the following.

[0008]

In the roll screen device having the above construction, since the retaining piece is attached so as to protrude only inside the screen when the screen is wound, the head of the retaining piece is wound when the screen is wound. Due to the winding force of the screen, the part strongly presses against the surface of the screen that has already been wound, and acts to bite between the screen that is being wound or the retaining piece attached to it, thereby rolling the screen thinly. In addition, the retaining piece does not overlap with the retaining piece on the screen that was wound immediately before winding.

Further, there is no need to perform special processing such as providing an extension piece for attaching a retaining piece to the side of the screen on the guide tape as in the above-mentioned conventional example. Further, the screen can be stably guided by the guide rail.

[0010]

1 to 4 show an embodiment in which the roll screen device according to the present invention is applied to an insect screen, and the insect screen, as clearly shown in FIGS. A screen box 1 attached to an upper part of a building opening is provided. A winding shaft 3 rotatably supported by box caps 2a and 2b at both left and right ends in the box 1.
, One end of a screen 5 constituting an insect repelling net is attached, the screen 5 is wound around the winding shaft 3, and an opening 1 a for leading out the screen 5 is provided at a lower portion of the box 1. The bottom bar 6 is attached to the leading end of the screen 5 that is led out. When the screen 5 is pulled out of the box 1, the bottom bar 6 always gives an appropriate tension to the screen 5 so that the bottom bar 6 has such a weight that the screen 5 can be stretched in the opening of the building.

In order to prevent the screen 5 from being loosened in the width direction when the screen 5 is stretched, a large number of retaining pieces 12 are attached along both left and right ends. Inner rail 9 that freely fits in
(See FIG. 3).
The rail member 8 is formed of a strong material such as aluminum, and the inner rail 9 is formed of a synthetic resin that can be molded with high precision and has low sliding resistance. The retaining pieces 12 are arranged in line along one side end of a guide tape 13 of a fixed width formed of cloth or synthetic resin, and the other side end of the tape 13 is sewn to the screen 5 or They are connected by welding.

As shown in FIG. 4, the retaining piece 12 is formed of a synthetic resin and comprises a locking head 12a and a welding leg 12b protruding from the head, and is attached to the guide tape 13. When the screen 5 is wound around the winding shaft 3, the head 12 a
So that the leg portion 12b penetrates the guide tape 13 so that the locking portion 12c formed by heat welding of the leg portion 12b does not substantially protrude from the screen 5. Attached to tape 13. At this time, the locking portion 12c is connected to the guide tape 1
3 has such a size, thickness and strength that it does not easily fall off the screen 3 and does not protrude from the screen 5 as much as possible.

The retaining piece 12 is attached at a position where it does not overlap the retaining piece on the screen wound immediately before. In the example shown in FIG. 1 and FIG. And is fixed so as to be shorter by at least the diameter d of the retaining piece 12 than the length of each turn from the end to the end of the winding. The pitch P may be made longer than the length of each winding by at least d. Here, the pitch P may be set at equal intervals as long as the above condition is satisfied, and the pitch P may be changed continuously or intermittently at an arbitrary interval in the winding direction of the screen 5. It can also be attached. The retaining piece 12 does not need to be attached to the guide tape as described above.
It can also be attached to

The winding shaft 3 has both ends slightly smaller in diameter than the guide tape 13 and the retaining piece provided at both ends of the screen 5 when the screen 5 is wound. Due to 12, both ends of the wound-up screen 5 are slightly swelled, which is a relief allowance 3 a for releasing it.

In the insect screen having the above structure, as shown in detail in FIG. 2, when the screen 5 is wound up, the retaining piece 12 overlaps with the position of the immediately preceding retractable piece 12. When the screen 5 is wound, the head 12a of the retaining piece 12 is already wound by the winding force of the screen because it is attached so as to protrude inside the screen 5 when the screen 5 is wound. Screen 5 which is strongly pressed against the surface of the screen 5 being wound, or the retaining piece 1 attached thereto.
Since it acts so as to bite between the two, enlargement of the winding diameter by the retaining piece 12 is suppressed to a minimum, and the screen 5 can be thinly wound.

Further, the retaining piece 12 can be easily attached to the guide tape 13 having a fixed width by heat welding, and an extension piece for attaching the retaining piece to the guide tape as in the conventional example is provided. It is not necessary to apply special processing, and it can be manufactured easily and inexpensively.
In addition, in the above-described conventional example, the attachment of the retaining piece to the extension piece makes the extension piece unstable in the guide rail due to its weight, which may make it impossible to guide the screen stably. According to the retaining piece 12, the screen can be guided stably in the guide rail.

[0017]

As described in detail above, according to the roll screen device of the present invention, when the screen is wound,
An increase in the winding diameter of the screen due to the polymerization of the retaining pieces can be prevented, and such a roll screen device can be manufactured easily, simply and inexpensively.

[Brief description of the drawings]

FIG. 1 is a partially broken front view showing an embodiment of a roll screen device according to the present invention.

FIG. 2 is a side sectional view of FIG.

FIG. 3 is an enlarged sectional view of the guide rail.

FIG. 4 is an enlarged front view of a retaining piece (before mounting).

[Explanation of symbols]

 Reference Signs List 1 screen box 3 winding shaft 5 screen 6 bottom bar 8 rail material 9 inner rail 9a slit 12 retaining piece 12a head 12b leg

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-50-82838 (JP, A) JP-A-4-107397 (JP, U) JP-A-3-126995 (JP, U) JP-A-1 162593 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) E06B 9/08-9/92

Claims (1)

(57) [Claims] 1. A screen wound around a winding shaft and capable of being opened and closed, a bottom bar attached to a tip of the screen, and a guide rail for slidably guiding a side end of the screen when the screen is opened and closed. Wherein the guide rails are provided with inner slits having slits in the main rails so that the ends of the screen are engaged with the screens, wherein the guide rails are arranged along both side edges of the screen. The synthetic resin stopper piece slidably engaged in the slit of the inner rail is provided with a locking head and welding legs protruding from the head. Is projected inside the screen when the screen is wound on the winding shaft, and the legs of the retaining pieces are substantially welded to the screen on the opposite side of the screen by heat welding. A roll screen device, wherein the device is attached to the screen so as not to protrude from the screen, and the retaining pieces at both side ends of the screen are attached at positions where they do not overlap with the retaining pieces on the screen wound immediately before.