JPH0329957B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a pleated screen in which a screen sheet made of paper, cloth, or the like is provided with a large number of folds so that it can be folded and unfolded.

In general, when this type of screen is unfolded, the opening of each fold is not constant; that is, due to the influence of the screen sheet's own weight, the opening of the folds is larger as the upper part of the screen is unfolded, and smaller as the lower part of the screen is unfolded. was damaged.

Therefore, in the past, for example, a tape-like material was placed on the back side of the screen sheet, and the tape was fixed at predetermined intervals by adhesive or other means.
Alternatively, by attaching locking devices at predetermined intervals to the tape, string, etc. that are inserted between each fold, from the back side of the screen sheet to support the folds of the screen sheet, each fold when the screen is unfolded. The opening was kept constant.

However, according to this conventional example, manufacturing is not necessarily easy and takes time and effort, and it is necessary to prepare special locking tools, resulting in high cost. was not necessarily good.

In view of the above-mentioned conventional defects, the present invention aims to provide a beautiful pleated screen that is easy to manufacture, has a simple structure, and can maintain the opening ratio of each fold at a constant level.

EMBODIMENT OF THE INVENTION Hereinafter, one embodiment of the present invention will be described based on the drawings.

First, in Figures 1 to 4, the upper and lower frames 1 and 2
In between are two pieces of the same width made of cloth, synthetic resin, paper (including synthetic paper), etc. with appropriate rigidity.
Two screen sheets, that is, a first screen sheet 3 and a second screen sheet 4 located on the back side of the first screen sheet 3 are stretched so as to overlap. However, both sheets 3 and 4 do not necessarily have to be made of the same material; for example,
The first sheet 3 can be made of paper and the second sheet 4 can be made of cloth, or vice versa.The combination is arbitrary, taking into consideration variations in lighting, blocking, light diffusion, and even fashionability. Select as appropriate.

Both sheets 3, 4 are formed with a large number of folds 5, 6 extending in the transverse direction, and can be folded and unfolded freely. ) are not the same size, that is, the folding width of the folding pleats 6 is smaller than the folding width of the folding pleats 5.

First, two small holes are transparently provided on both sides of each fold 5, that is, a first small hole 7 located closer to the outer fold and a second small hole 8 located closer to the inner fold. There is. However, these first and second small holes 7, 8 do not necessarily have to have the same diameter, nor do they need to be located equidistant from both ends of the fold 5.

On the other hand, on both sides of each fold 6, a third small hole 9 is transparently located so as to communicate with the second small hole 8 in the vertical direction when both sheets 3 and 4 are folded. be done. However, the relationship between these second and third small holes 8, 9 is different from that of the sheet 3,
4 is folded, it is sufficient to form a communicating portion, so they do not necessarily have to have the same diameter.

The lifting cords 10 and 11 are inserted through the folds 5 and 6 of the sheets 3 and 4 through the first to third small holes 7, 8 and 9, details of which are shown in Fig. 3. It is shown in the principle diagram.

That is, pulleys 12 are attached to shafts 13 on both sides of the upper frame 1 so as to be perpendicular to the longitudinal direction thereof, and pulleys 12 are attached to both sides of the lower frame 2 in the same direction as the longitudinal direction. A pulley 14 is attached to the shaft 13. The lifting strings 10 and 11 have one end connected to the upper frame 1.
It is sent out to the lower frame 2 by simultaneously passing through the small hole 8 of the first sheet 3 and the small hole 9 of the second sheet 4 while being fixed to the sheet. Then, within the lower frame 2, the feeding direction is changed by passing through the pulley 14, and after that, the first sheet 3
It is sent back to the upper frame 1 so as to pass only through the small hole 7.

The elevating strings 10 and 11 sent back are connected to an external operation string 16 via a pulley 12 in the upper frame 1 and a stopper device 15 for elevating and lowering control attached to one side of the upper frame 1. has been done.

In addition, the lifting strings 10 and 11 are not necessarily connected to the pulley 1.
2 and 14, but may be guided by a fixed member having a smooth guide portion made of, for example, a synthetic resin.

Now, to describe the operation of the pleated screen according to the present invention configured as described above, firstly, when the screen is folded and the operating string 16 is pulled, the stop function of the stopper device 15 is released, and the lower frame 2 gradually descends due to its own weight.

In parallel with the lowering of the lower frame 2, the respective folds 5 and 6 of the first and second sheets 3 and 4 are folded.
It opens sequentially from above due to the restoring force and the influence of its own weight. The opening of the same fold pleats 5 and 6 at this time is
Both the inner and outer folds move closer to the lift strings 10 and 11 in sequence, and as shown in FIG. 4A, the space through which the lift strings 10 and 11 are inserted,
That is, as long as the vertical common space S formed between the second small hole 8 and the third small hole 9 exists, the growth progresses smoothly.

Then, as the opening of each fold 5, 6 further progresses, the common space S disappears and the second
and the respective peripheral edges of the third small holes 8 and 9 are connected to the lifting string 1
It starts to come into contact with 0 and 11. At this time, since the lifting cords 10 and 11 are always under tension due to the weight of the lower frame 2, a frictional force is generated between them and the peripheral edge.
Moreover, it increases as the width of the folds 5 and 6 increases. When this frictional force becomes larger than the force of the folds 5, 6 that try to open themselves, the folds 5, 6 are stopped from opening further, as shown in FIG. 4B. It becomes a lock state.

Thus, as the lower frame 2 descends, the above action is repeated sequentially from above, and each fold 5 of the sheet 3 is
is maintained at a constant opening from the top end to the bottom end.

However, the opening of the folds 5 can be arbitrarily adjusted by changing the elements ○I to ○C below.

○B Folding width of the folding pleat 6 ○B Transparent position of the second and third small holes 8 and 9 ○C Diameter size of the second and third small holes 8 and 9 In other words, the folding width of the folding pleat 6 The shorter it is, the closer the transparent positions of the second and third small holes 8 and 9 are to the inner fold, and the larger the diameters of the second and third small holes 8 and 9. Indeed, the opening of each fold 5 becomes larger, and vice versa, it becomes smaller. Therefore, by appropriately changing the above-mentioned elements, it is possible to give the folds 5 an opening of a desired size.

Then, in the state where the screen pleats are unfolded, pull the operation string 16 again and lower the lower frame 2.
When the screen pleats are lifted, the locks are sequentially released from the fold pleats 5 located below, and the entire screen pleat is folded without difficulty.

In addition, the pulley 14 installed in the lower frame 2 is
Since it constitutes a so-called movable pulley, the pulling force required for the folding is reduced to half.

Also, according to this example, the first and second sheets 3,
Since an air layer is formed between the two, improvements in heat insulation and soundproofing effects can be expected.

However, as in this embodiment, it is not always necessary to arrange the first screen sheet 3 on the front side and the second screen sheet 4 on the back side; on the other hand, it is not necessary to arrange the first screen sheet 3 on the front side and the second screen sheet 4 on the back side. It is also possible to use the first screen sheet 3 by placing it on the back side. In this case, only the small holes 9 appear on the front side, and the small holes 7 and 8 are hidden on the back side. Only one elevating string 10, 11 appears on each side, and aesthetically pleasing results can be obtained.

Next, FIG. 5 shows another embodiment of the present invention, and the difference from the first embodiment is that the folds 6
is formed into a narrow sheet 17, and the sheet 17 is arranged in parallel at the insertion points of the lifting cords 10 and 11.

Also in this example, the opening of the folds 5 can be kept constant as in the first embodiment.

Next, in FIG.
8 and 19, and the same bars 18 and 19.
The main difference from the first embodiment is that a separate and independent lifting string 10, 11 is used as the insertion member. This is because the bars 18 and 19 are used.
In addition, in this embodiment, the lifting cords 10 and 11 are as follows:
It is attached so as to pass through the outside of the sheets 3 and 4.

FIG. 7 shows an example in which the present invention is applied to a pleated screen that can be folded in the left and right directions. That is, the first and second sheets 3 and 4 have a large number of folds 5 extending in the longitudinal direction.
6 are provided, and on both upper and lower sides of the same folding folds 5 and 6, bars 21 and 6 are attached and fixed to the frame 20.
Small holes 8 and 9 are transparently provided through which the parts 22 are inserted. Instead of the bars 21 and 22, strings, tapes, wires, etc. may be used.

As is clear from this example, the application of the present invention is not limited to pleated screens that are folded in the vertical direction.

In addition, in the above-mentioned embodiments, the sheet is
In this example, the width of the folds is kept constant by stacking sheets, but the number is not limited to two sheets, and three or more sheets may be stacked.

As is clear from the above description, the pleated screen according to the present invention can maintain the opening of each fold at a constant level without gluing tape or attaching special fasteners. The appearance of the sheet is not impaired in any way, and since it has a simple structure, it does not require much time and effort to manufacture, and can be provided at low cost.

[Brief explanation of drawings]

Fig. 1 is a perspective view of the pleated screen of the present invention, Fig. 2 is a partial cross-sectional view of each fold, and Fig. 3 is a perspective view of the pleated screen of the present invention.
The figure is a principle diagram of the pleated screen shown in Figure 1, Figures 4A and B are enlarged cross-sectional views of folded pleats to explain the locking action of the folded pleats, and Figure 5 is another embodiment of the present invention. A partially omitted rear view of the barrel pleated screen, and FIGS. 6 and 7 are perspective views of other embodiments, respectively. 1... Upper frame, 2... Lower frame, 3... Screen sheet, 4, 17... Sheet, 5, 6... Folding folds, 7, 8, 9... Small hole, 10, 11... Lifting string , 16...operation string.

Claims (1)

[Claims] 1. One or more sheets 4 in which a large number of folds 6 are formed on a screen sheet 3 with a large number of folds 5 and a large number of folds 6 are formed with a fold width smaller than the fold width of the folds 5, 17 are overlapped, and small holes 8 and 9 are formed in these folds 5 and 6, respectively, so that they communicate with each other in the vertical or horizontal direction when the sheets 3 and 4, 17 are folded. A pleated screen characterized in that an insertion member such as a string, tape, or rod is passed through the small holes 8 and 9. 2. The pleated screen according to claim 1, wherein each of the folds 5 and 6 is formed to extend in the lateral direction. 3. The pleated screen according to claim 1, wherein the sheet 4 has the same width as the sheet 3. 4. The pleated screen according to claim 3, wherein the sheet 4 is made of a different material from the sheet 3. 5 The insertion member has one end fixed to the upper frame 1, and is sent out to the lower frame 2 so as to pass through the small holes 8 and 9 of each fold fold 5 and 6, and then the fold fold 5 The lift strings 10 and 11 are sent back to the upper frame 1 by passing through another small hole 7 formed in the upper frame 1, and are connected to the external operation string 16 from inside the upper frame 1. The pleated screen according to claim 1, characterized by: