JPH0137553B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in insect-proof screen doors disposed on windows of buildings (including entrances and exits such as back doors).

Windows and back doors are opened during the hot summer months to improve ventilation, but screens are fitted to prevent mosquitoes and flies from entering.

However, having a screen on an open area is not only annoying, but it can also come off when moving the screen to open the window.

This invention solves the above-mentioned problems of conventional screen doors.The purpose of this invention is to roll up the fabric such as the insect screen on the screen door, and when the fabric such as the insect screen is pulled down, there is a gap where mosquitoes and flies can enter. There is no screen door.

The details of this invention will be explained below based on embodiments shown in the accompanying drawings.

In the figure, 1 is the peripheral frame for the screen door, 2 is the peripheral frame 1
This is a roller for unwinding that is attached to the upper frame of the machine, and this roller is equipped with a coiled spring around its axis to provide restorability in the winding direction.

One end of a cloth 3 such as an insect repellent net or a curtain is wrapped around and fixed to the roller 2, and a crosspiece 4 for pulling and pulling up is fixed to the lower end of the cloth. Reference numeral 5 designates a lock knob attached to the crosspiece 4 that can be raised freely, and 6 designates a hole through which a hook piece 7 integrated with the knob 5 provided on the lower stile of the peripheral frame is engaged.

As enlarged in FIG. 2, tape halves 9 having fastening teeth 8 of a slide fastener are sewn to the left and right edges of the fabric 3 over their entire length.

Furthermore, on the inner surfaces of the left and right vertical frames of the peripheral frame 1, extending from the lower end to the roller 2, there is a bulging convex portion on both the front and back sides by the fastening teeth 8 of the tape half 9 of the slide fastener, as shown in FIG. A rail 12 with a groove 11 that engages the rail 10 is provided.

Furthermore, the tape half 9 of the slide fastener is used in which the tape portion a is stacked in two layers, and the side edge of the fabric 3 is sandwiched between the two tape portions to create a zigzag stitch. It is sewn by a sewing machine.

The reason for this is that the fabric 3 may be relatively coarse to the extent that small insects cannot pass through, and the insect screen in particular is made of slippery Saran fiber yarn alternately woven vertically and horizontally. When an external force is applied to the tape 3, the tape half easily comes off from the fabric 3 because it is caught in the rail groove 11.Especially in the case of insect repellent nets, the knitting yarns come apart even with a small force, making it impossible to use the tape afterward. There is a problem that it will not hold up, but if you double the tape part of the tape half and sandwich the side edge of the fabric,
When the superimposed tape part and the fabric are sewn together using a sewing machine such as a zigzag stitch, the knitting thread of the fabric is sewn together with both tape parts and the sewing thread, and the sewn together knitting thread, sewing thread, and tape part are sewn together. Since the bonding force with the knitting yarn acts as a resistance force against external force, a strong fixing force is obtained, and the above-mentioned problem of the knitting yarn coming apart is eliminated. On the other hand, in the case of a structure in which the tape part of the fastener tape half is made of a single layer and the tape part is adhered to one side of the fabric side edge by fusion bonding, the external force applied to the fabric will cause the tape part to unilaterally move away from the fabric. Since it works to pull it off and loosen the knitting yarn, it has the disadvantage that the tape part can easily come off from the fabric with a small force. In addition, the above-mentioned effect of preventing unraveling can be obtained to a greater extent as the fabric has a larger weave, such as an insect screen.

13 is a cover that covers two parts of the roller.

The bulging convex part of the tape half of the slide fastener is not necessarily limited to a continuous fastening tooth 8, but a spiral filament is fixed to the tip edge of the tape half by sewing with a sewing machine so that each ring part is equally spaced. It is also possible to form a bulging protrusion by forming a bulging convex portion, or by integrally forming a bulging convex strip on both the front and back sides of the leading edge of the synthetic resin tape.

This invention is as described above, and this screen door supports a roller on the upper stile of the screen door peripheral frame body, and winds and unwinds one end of a cloth such as an insect screen or curtain by wrapping and fixing it around this roller. The slide fastener tape halves are attached to the left and right edges of the insect screen along its entire length, and the slide fastener tape halves protrude on both the front and back sides of the left and right vertical frames of the surrounding frame. Since it is equipped with a grooved rail that engages a series of convex portions (or convex stripes), the insect screen or other fabric can be pulled out from the roller and stretched only when insect control is required by opening the glass window. When the glass window is closed, the insect screen or other fabric can be rolled up to improve daylight and external visibility.The screen can be fixed to the window all year round, and the slide fastener tape half can be rolled up. By using two tape parts and sandwiching the side edges of the fabric between both tape parts for strong machine sewing, there is no risk of the tape halves coming off from the fabric.

In addition, when half of the tape of a slide fastener is attached to the side edge of a fabric such as an insect screen, due to the presence of the bulging convex part, when the fabric is rolled up into a roller, the diameter on both sides of the rolled up fabric increases and the center part becomes loose. However, by making both end portions b of the roller small in diameter as shown in FIG. 3, the above-mentioned disadvantage can be solved.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, and FIG. 1 is a perspective view of a screen with some fabric, such as an insect repellent screen, wrapped around it, FIG. 2 is an enlarged perspective view of the main part of only the fabric, and FIG.
The figure is an enlarged partially cutaway front view of the screen door, Figure 4 is a sectional view taken along the line from Figure 3, and Figure 5 is from Figure 3.
FIG. DESCRIPTION OF SYMBOLS 1... Peripheral frame body, 2... Roller, 3... Fabric such as an insect screen, 9... Slide fastener tape half, a... Tape part, 10... Swelling convex part, 11...
...Groove of rail 12.

Claims (1)

[Claims] 1. A rewinding roller is supported on the upper stile of the peripheral frame, one end of a fabric such as an insect repellent net is wound around it and fixed, and a slide fastener tape half is attached to the left and right edges of the fabric along its entire length. Attachment, the tape halves are made by stacking the tape parts in two layers, sandwiching the side edges of the fabric between both tapes, sewing the sandwiched parts with a sewing machine such as a zigzag stitch, and attaching the tape halves to the left and right vertical frames of the peripheral frame. A grooved rail is formed on the opposing inner surface of the slide fastener tape in a range extending from the lower end to the upper roller, and the groove of the rail is widened deep enough to bite into the protrusion that protrudes on both the front and back sides of the slide fastener tape half to prevent it from coming out. A building screen door featuring: