JPH08226292A - Rolling screen device - Google Patents

Abstract

PURPOSE: To superpose a slipping-off preventive piece and prevent the increase of the winding diameter of a screen when the screen is wound, and to manufacture a rolling screen device easily and simply at a low cost. CONSTITUTION: Slipping-off preventive pieces 12 made of a synthetic resin are disposed in rows at both side ends of a screen 5, and engaged slidably into the slits 9a of inner rails 9. The slipping-off preventive piece 12 has a head section for engagement and a leg section for welding, the head section is protruded so as to be placed inside the screen 5 when the screen 5 is wound, and the leg section is fitted in an extent that the leg section is not projected from the screen 5 by thermal welding on the reverse side of the screen 5. The slipping-off preventive pieces 12 are mounted at places not stacked to the slipping-off preventive pieces 12 on the screen 5 wound immediately before rolling.

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, such as a roll type insect screen or a blind, in which the screen can be opened and closed by the rotation of a winding shaft.

[0002]

2. Description of the Related Art In a roll type screen door which is a kind of roll screen device, a retaining piece is provided on the side of the screen to engage guide rails arranged on both sides of the screen,
The one that slidably guides the side edge of the screen is
It is conventionally known as disclosed in Japanese Utility Model Publication No. 52-41729. In this roll type screen door, by making both ends of the winding shaft of the screen small in diameter, an escape margin is formed in the case where the retaining pieces are polymerized, and the winding diameter at the side end of the screen is enlarged. It's suppressed.

However, this type of roll screen door is
Even if the escape allowance is provided, there is a possibility that the winding diameter of the side end portion in which the retaining pieces are arranged becomes large due to the polymerization of the retaining pieces during the winding of the screen, and even if the retaining pieces are used. Even in the case where is not polymerized, each take-off piece only comes into contact with the surface of the screen wound before or after the take-up shaft, and the take-up diameter of the screen becomes considerably large depending on the thickness of the take-off piece. Therefore, the winding diameter may become larger than the clearance allowance.

In order to solve such a problem, for example, in a roll screen device disclosed in Japanese Utility Model Laid-Open No. 58-64796, lateral extension pieces are provided at both side edges of the screen, and the extension is performed. A retaining piece is provided on one surface, and the retaining pieces are engaged with guide rails arranged on both sides of the screen, and the same clearance as the retaining piece is provided at the outer end of the winding shaft of the screen. Is forming.

In the roll screen device having the above-mentioned extension piece, since the extension piece has a large degree of freedom such as bending, the retaining piece can be efficiently accommodated in the escape allowance, but because of the large degree of freedom, the retaining piece The retaining piece cannot be stably fitted into the guide rail due to weight or the like, and as a result, stable guide by the guide rail may be difficult. Further, in order to attach the above-mentioned retaining piece, it is necessary to separately provide a guide tape having a special shape provided with an extension piece on the side, so that there is a problem that an extra cost is required accordingly.

[0006]

SUMMARY OF THE INVENTION An object of the present invention is to increase the winding diameter of a screen in a roll screen device such as the above-mentioned roll type screen when the screen is wound up because the retaining pieces are polymerized. SUMMARY OF THE INVENTION It is an object of the present invention to provide a roll screen device which can prevent such a problem and can easily and easily manufacture such a roll screen device at low cost.

[0007]

In order to solve the above problems, the present invention relates to a screen which is wound around a winding shaft and can be opened and closed, a bottom bar attached to the front end of the screen, and a screen when the screen is opened and closed. A guide rail for slidably guiding the side end portion of the screen, the guide rail having an inner rail with a slit in which the end portion of the screen engages in the main rail in a retaining state. In the roll screen device, a retaining piece made of a synthetic resin, which is arranged along both ends of the screen and is slidably engaged in the slit of the inner rail, is provided from the locking head and the head. With a protruding welding leg portion, the head portion is provided so as to be inside the screen when the screen is wound around the winding shaft, and the leg portion of the retaining piece is screwed. Attached to the screen on the opposite side of the screen so that it does not substantially protrude from the screen by heat welding, and the retaining pieces at the both ends of the screen are attached to the immediately wound screen so as not to overlap with the retaining pieces. It is characterized by that.

[0008]

In the roll screen device having the above structure, since the retaining piece is attached so as to project only inside the screen when the screen is wound, the head of the retaining piece is wound when the screen is wound. The portion of the screen strongly presses against the surface of the screen that has already been wound due to the winding force of the screen, and acts so as to bite between the wound screen or the retaining pieces attached to it, and then winds the screen thinly. In addition, the retaining piece does not overlap the position of the retaining piece on the screen just wound at the time of winding.

Further, unlike the above-mentioned conventional example, since it is not necessary to perform special processing such as providing an extension piece for attaching the retaining piece to the side of the screen on the guide tape, the guide tape can be manufactured at low cost, In addition, 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 FIG. 1 and FIG. A winding box 3 provided with a screen box 1 attached to the upper part of a building opening and rotatably supported by box caps 2a and 2b at both left and right ends of the box 1.
, One end of a screen 5 constituting an insect net is attached, the screen 5 is wound around the winding shaft 3, and an opening 1a for leading out the screen 5 is provided in the lower part of the box 1. Then, the bottom bar 6 is attached to the leading end of the screen 5 that has been drawn out. The bottom bar 6 always gives an appropriate tension to the screen 5 when the screen 5 is pulled out from the box 1, and has a weight enough to stretch the screen 5 over the building opening.

In order to prevent the screen 5 from being loosened in the width direction when it is stretched, a large number of retaining pieces 12 are attached along the left and right ends of the screen 5, and the retaining pieces 12 are mounted in the left and right rail members 8. Inner rail 9 freely inserted into
Is engaged with the inner edge of the slit 9a (see FIG. 3).
The rail member 8 is made of a strong material such as aluminum, and the inner rail 9 is made of a synthetic resin that can be accurately molded and has a small sliding resistance. The retaining pieces 12 are arranged along one side edge of a constant width guide tape 13 formed of cloth or synthetic resin, and the other side edge of the tape 13 is sewn to the screen 5 or It is connected by welding.

The retaining piece 12 is made of synthetic resin, and as shown in FIG. 4, comprises a locking head 12a and a welding leg 12b protruding from the head, and is attached to the guide tape 13. In this case, the head 12a is used to wind the screen 5 around the winding shaft 3 when the screen 5 is wound.
The leg portion 12b is penetrated through the guide tape 13 so that the engaging portion 12c formed by thermal welding of the leg portion 12b does not substantially protrude from the screen 5, It is attached to the tape 13. At this time, the locking portion 12c is the guide tape 1
The size, thickness, and strength are such that they do not easily fall off from the screen 3, and they do not protrude from the screen 5 as much as possible.

The retaining piece 12 is attached at a position on the screen wound immediately before it so as not to overlap with the retaining piece. In the example shown in FIGS. 1 and 2, the pitch P is set to the start of winding of the screen 5. It is fixed by shifting so as to be shorter than the length of each winding from the end to the end of winding by at least the length d of the diameter of the retaining piece 12. The pitch P may be set to be longer than the length of each winding by at least d. Here, the pitch P can be set to equal intervals as long as the above-mentioned conditions are satisfied, and the pitch P is continuously or intermittently changed 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, but can be directly attached to the screen 5
It can also be attached to.

It should be noted that both ends of the winding shaft 3 are slightly smaller in diameter, but when the screen 5 is wound, the guide tape 13 and the retaining piece provided on both ends of the screen 5 are provided. Both ends of the wound-up screen 5 are slightly swollen by 12 so that it is an escape allowance 3a for letting it escape.

In the insect screen door 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 retaining piece 12 just wound up. The head 12a of the retaining piece 12 is already wound by the winding force of the screen because it is not wound and is attached so as to project inside the screen 5 when the screen 5 is wound. The screen 5 that is wound or the retaining piece 1 attached to the screen 5 that is strongly pressed against the surface of the screen 5 that is wound.
Since it acts so as to cut into between the two, the expansion of the winding diameter by the retaining piece 12 is suppressed to the minimum, and the screen 5 can be wound thinly.

Further, the retaining piece 12 can be easily attached to the guide tape 13 having a constant width by heat welding, and like the conventional example, an extension piece for attaching the retaining piece to the guide tape is provided. It is possible to manufacture easily and inexpensively without the need for special processing.
Moreover, in the above-mentioned conventional example, by attaching the retaining piece to the extension piece, the extension piece may become unstable in the guide rail due to its weight, which may make it impossible to stably guide the screen. According to the retaining piece 12, the screen can be stably guided 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,
It is possible to prevent the winding diameter of the screen from increasing due to polymerization of the retaining pieces, and to manufacture such a roll screen device easily, simply and inexpensively.

[Brief description of drawings]

FIG. 1 is a partially cutaway 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 cross-sectional view of the guide rail.

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

[Explanation of symbols]

 1 Screen Box 3 Winding Shaft 5 Screen 6 Bottom Bar 8 Rail Material 9 Inner Rail 9a Slit 12 Stopping Piece 12a Head 12b Leg

Claims (1)

[Claims] 1. A screen which is wound around a winding shaft and can be opened and closed, a bottom bar which is attached to a tip of the screen, and a guide rail which slidably guides a side end portion of the screen when the screen is opened and closed. In the roll screen device, wherein the guide rail includes an inner rail with a slit in which the end of the screen engages with the main rail in a retaining state, a guide line is provided along both ends of the screen. A synthetic resin retaining piece slidably engaged in the slit of the inner rail is provided with a locking head and a welding leg protruding from the head. Projecting so as to be inside the screen when the screen is wound around the winding shaft, and the leg portion of the retaining piece is substantially heat-welded to the screen on the opposite side of the screen. A roll screen device, wherein the roll screen device is attached to a screen so that it does not protrude from the screen, and the retaining pieces at both side ends of the screen are attached to positions that do not overlap with the retaining pieces on the screen wound immediately before.