Net guide for side-sliding wire screen

Details Net guide for side-sliding wire screen Net guide for side-sliding wire screen

2000-04-18

2001-11-20

Johnson, Blair M. (Department: 3634)

Flexible or portable closure, partition, or panel

With hood, canopy, shield storage chamber, or outrigged...

For roll type

C160S084060, C160S194000, C160S271000

Reexamination Certificate

active

06318438

ABSTRACT:

INDUSTRIAL FIELD OF THE INVENTION
The present invention relates to a net guide for a side-sliding wire screen. More particularly, the invention relates to a net guide which inhibits shaking of the net by accessing to any one of frames attached to the both ends of the net in response to expansion/contraction of the net, and being introduced along the upper end or the lower end of the net in the stretched state to hold the end thereof.
DESCRIPTION OF THE RELATED ART
For a wire screen in which an expandable accordion-shaped net made by alternately folding can be opened and closed by side sliding, it is the usual practice to insert the upper and lower ends of the net into grooves in the frame to inhibit deflection of the upper and lower ends of the net bending before the wind, or to prevent insects from entering.
However, the frame into which the ends of the net are to be inserted is usually installed fixedly to an opening of the building even when housing the folded net, and this prevents smooth passage of those who enter or leave the building through the opening. There is therefore a demand for a frame which can be excluded together with the net upon opening or closing.
To cope with the aforementioned demand, several proposals have already been made of frames into which the ends of the net are inserted, permitting exclusion together with the net upon housing the folded net (for example, Japanese Unexamined Patent Application Publication No. 8-28160). However, expansive products or ones highly susceptible to failure through the use for years are not welcome in the market, and there is a demand for a simple structure, a low cost and a sufficiently low susceptibility to failure.
DISCLOSURE OF THE INVENTION
The present invention was developed to solve these conventional problems, and has a technical object to provide a net guide for a side-sliding wire screen which is easily manufacturable at the lowest possible cost.
Another technical object of the invention is to enable to easily provide a net guide made multi-functional by imparting not only the function preventing shaking of the net, but also functions of side guiding for opening and closing the net and preventing the net from coming off through engagement with the net.
To achieve the aforementioned objects, the present invention provides a net guide for a side-sliding wire screen in which an expandable net alternately folded in directions counter to each other slides sideways, and which inhibits shaking of the net by entering/leaving the interior of any of frames attached to the both ends of the net in response to expansion or contraction of the net, and by being guided along the upper end or the lower end of the net in a stretched state to hold the upper end or the lower end; wherein a long member having a substantially U-shaped cross-section comprising at least a pair of shaking preventive members and a bottom connecting the both shaking preventive members at intervals with the net in between, and concave notches arranged at certain intervals which allows a deflection of the bottom are provided in the shaking preventive member.
In the aforementioned net guide for a side-sliding wire screen, it is appropriate to provide cut portions at the mouths of concave notches provided in the shaking preventive member for expansion and opening of the mouths, and to provide a guiding ridge for arresting the net at the guiding section at the opening of the net stretching section on each of the both sides of the back of the bottom of the long member along the same.
A stopper recess or a projection engaging with an stopper section may be provided along the long member having a substantially U-shaped cross-section.
The net guide having the above-mentioned configuration is used for inhibiting shaking of the net by, in response to expansion or contraction formed by folding in directions counter to each other, entering and leaving the interior of any one of frames attached to the both ends of the net, and by being guided along the upper end or the lower end of the net in a stretched state to hold that end. It is basically formed into a long member having a U-shaped cross-section from a soft synthetic resin extruded material, and concave notches are provided at certain intervals in the shaking preventive section. The net guide having such a simple structure and easily manufacturable can be provided as a result at a very low cost, and by imparting a necessary strength to the bottom, the possibility of a failure such as breakage can be almost eliminated.
By using such a configuration, it is easy to cause the net guide to deflect, to enter or leave the interior of the frames attached to the both ends of the net in response to expansion or contraction of the net, and guide it along the upper end or the lower end of the net in the stretched state.
Further, by reducing the width of the concave notch of a certain interval cut in the shaking preventive section and expanding and opening only the mouth of the concave notch to avoid interference upon deflection, the holding function of net ends is improved, and a failure is never caused by a part of the net coming off the concave notch. By engaging the stopper section provided on the net with a stopper recess or a stopper projection of the net guide, it is possible more certainly ensure holding of the ends of the net.
Since the aforementioned net guide is basically formed of an extruded material having a certain cross-section, it is possible not only to achieve a function of preventing shaking, but also to easily form an engaging section for preventing the sliding guide for opening and closing the net and the net from coming off and thus to achieve multiple functions of the net guide.


REFERENCES:
patent: 1425484 (1922-08-01), Jenkins
patent: 1882982 (1932-10-01), Schmiedeskamp
patent: 1948262 (1934-02-01), Gabriel
patent: 4557309 (1985-12-01), Judkins
patent: 4858668 (1989-08-01), Toti
patent: 4862941 (1989-09-01), Coloson
patent: 5377737 (1995-01-01), Moriya et al.
patent: 5873401 (1999-02-01), Tsuchida
patent: 5937929 (1999-08-01), Chen
patent: 6186212 (2001-02-01), Tsuchida
patent: 8-28160 (1996-01-01), None

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