JPS61685A - Sheet - Google Patents

Abstract

PURPOSE:A plurality of sheets are arranged so that their end faces oppose to the end faces of adjacent sheets and sewed with a needle thread and a binding bobbin thread by threading across the interface so that the two threads form binding knots to give regenerated sheet with increase commodity values. CONSTITUTION:A plurality of sheets, e.g., strips of waste artificial leather after removing defect parts, are arranged so that ends of a sheet face to ends of adjacent sheets 1, 1 and the sheets are sewed by threading across interfaces in zigzag forms. At this time, the needle thread 2a and the bobbin thread 2b are connected by round tying 2 where at least 3 knots are formed per 1 stroke to prevent threads from untying. When sheets different in color are used, a sheet of check pattern is obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to a sheet formed by piecing together sheet pieces.

[Background Art] Artificial leather has been introduced as a substitute for natural leather, but as the manufacturing technology of artificial leather has improved, there has been a desire for higher quality leather. The current situation is that as the desire for luxury products increases, the manufacturing process becomes more complex, and as a result, the probability of defective products is also increasing. The defective fabrics generated in this way are ranked according to the degree of defectiveness, and those with a low degree of defectiveness are priced lower, while those with a high degree of defectiveness are discarded. This reduces the manufacturing cost of artificial leather, and there is a desire to recycle defective fabrics with high commercial value. This is true not only for artificial leather but also for woven fabrics, nonwoven fabrics, resin sheets, etc.

Therefore, in order to regenerate the artificial leather with high commercial value, the present inventors have developed a method of sewing together rectangular or band-shaped sheet pieces obtained from fabrics of artificial leather, for example, by sewing together one sheet piece of artificial leather from a large number of sheet pieces. We considered recycling artificial leather seats.

However, in this case, it has been found that various problems arise when the sheet pieces are sewn using conventional sewing methods.

That is, as one of the conventional sewing methods, the one shown in FIG. 8(a) is one in which the ends of the sheet pieces 1, 1 are overlapped on one side, and this overlapped part is sewn together with thread 2. In the case shown in FIG. 8(b), the ends of the sheet pieces 1, 1 are overlapped vertically, and the overlapped parts are sewn together with thread 2. However, in these cases, an overlap allowance is required for sewing, resulting in a loss of dimensions for the overlap allowance, which creates a problem in terms of cost. This results in a stiff and uncomfortable texture.In addition, since the sheet pieces are sewn together with the overlap margins aligned, the sheet pieces 1°1 are stuck together in the sewn area, and there is no breathability in this area (especially when using artificial leather). does not have breathability, so if there is no breathability in the sewn part, the body will get stuffy and it is not suitable for clothing).As a result, the sheet obtained by sewing the sheet pieces 1 together may not be able to be used for clothing. There is a problem that there are limitations. In particular, Figure 8 (,
), the overlapping allowance protrudes from the sheet piece 1, so the overlapping allowance can only be provided on the back side of the sheet, and there is also the problem that the sheet must be used only on the front and back sides. Furthermore, when sewing the sheet pieces 1, 1, sewing is usually done by sewing machine, and at this time, upper thread 2a and lower thread 2b are used as thread 2, and upper thread 2a is threaded through sheet piece 1 with a sewing machine needle. By hooking and sewing the upper thread 2a and the lower thread 2b supplied from the bobbin as shown in Fig. 9, the upper thread 2a and the lower thread 2b
The sewn state between the sheet pieces 1 and 1 is maintained by this. However, in the case where the sewing state is maintained by hooking the upper thread 2a and the lower thread 2b, if the upper thread 2a and the lower thread 21 are cut when the sheet is cut or washed, There is a problem in that the upper thread 2a and the lower thread 2b may become unhooked and frayed, and each sheet piece 1 may fall apart.

[Objective of the Invention 1] The present invention has been made in view of the above-mentioned α, and can be sewn without loss of sheet pieces, has excellent feel and breathability, and has the following advantages: It is an object of the present invention to provide a sheet that is not limited in terms of front and back sides, and furthermore, the threads do not become frayed and the sheet pieces do not come apart.

[Disclosure of the Invention] The sheet according to the present invention includes a plurality of sheet pieces 1, 1
... are arranged with the end faces of adjacent sheet pieces 1, 1 facing each other, and each adjacent sheet piece 1゜1 is arranged as a sheet piece 1.
．． The needle thread 2a and the bobbin thread 2b are sewn between one side and the other side of the end of the thread 1, respectively, and the needle thread 2a and the bobbin thread 2b form knots 3 at appropriate locations.
The sheet pieces 1 are arranged in this way, and the upper thread 2a and the lower thread 2b are
The above object has been achieved by connecting the upper thread 2a and the lower thread 2b with a knot 3 when sewing them together.The present invention will be described in detail below with reference to examples.

As the sheet piece 1, in addition to those obtained from defective artificial leather, those obtained from natural leather, woven fabric, nonwoven fabric, resin sheet, etc. can be used, and in some cases, those obtained from good artificial leather. You can also use

In short, any sheet-like material that can be sewn with thread can be used. First, a case where the sheet piece 1 is rectangular will be described.

FIG. 2 shows an embodiment of the present invention, in which the size of the sheet pieces 1 is arbitrary, but they are formed in a square shape, a rectangular shape, etc., and a large number of sheet pieces 1 are arranged without vertical and horizontal gaps. The adjacent sheet pieces 1, 1 are faced with their end surfaces butted against each other as shown in FIG. has been done. For example, sewing is performed using a zigzag stitch on a zigzag sewing machine, and when sewing with a zigzag sewing machine, the upper thread 2a
The lower thread 2b goes up on one side of the sheet piece 1 and is sewn into the sheet piece 1 from the other side of the sheet piece l, but at this time, the upper thread 2a and the lower thread 2b are tied together by a knot 3 formed by a round knot. It is meant to be tied together. That is,
As shown in FIG. 4(a), part A of the upper thread 2a, which is pierced downward into the sheet piece 1 by the forward process of the needle of the sewing machine, is caught by the upward part B of the lower thread 2b supplied from the bobbin. The upper thread 2a and the lower thread 2 are connected so that the C part of the upper thread 2a, which is pulled upward by the reversing process of the needle of the sewing machine, is further hooked on the downward D part of the lower thread 2b.
When the sheet piece 1 is fed by the feed mechanism of the sewing machine, tensile force is applied to the upper thread 2a and the lower thread 2b, so that the upper thread 2g and the lower thread 2b are is to be tied with a round knot 3 as shown in Fig. 4(b). As shown in FIG. 1(a), the knots 3 are made at three straight sections of the zigzag stitch, that is, at three points per stroke S. In this way, when sewing the sheet pieces 1, 1 with the upper thread 2a and lower thread 2b by machine sewing, the upper thread 2a and the lower thread 2b are connected by the knot 3, so that the sheets can be sewn together. Even if the upper thread 2a and lower thread 2b are cut due to cutting or washing, the fraying of the upper thread 2a and lower thread 2b will stop at the knot 3 and the fraying will not progress any further. , upper thread 2
This prevents the sheet pieces 1, 1 from coming unstitched due to fraying of the thread a and the bobbin thread 2b, thereby preventing the sheet pieces 1 from coming apart. Here, if the knot 3 is provided at three locations in the -stroke S as shown in FIG. Even if it is less than this, the effect can be obtained,
- One or more locations in the stroke S is sufficient. In addition, if the upper thread 2a and the lower thread 2b are made of a material having a stronger strength than the sheet piece 1, for example, Tetoron thread coated with a petroleum-based reinforcing resin to increase the strength by about 2.5 times,
Even if the sheet piece 1 is torn, the sewing thread will not break, making it a strong sheet, and the upper thread 2a and lower thread 2b can be formed into thinner threads.

In the embodiment shown in Fig. 2, sheets were created using sheet pieces 1 of various different sizes, but in Fig.
) Sheet pieces 1 of the same size may be arranged horizontally in rows and columns. In this case, for example, by color-coding the sheet pieces 1, 1, etc. into two types of colors and arranging the sheet pieces 1 so that the sheet pieces 1 of different colors are adjacent to each other, a checkered horizontal sheet can be created. can be finished.

Furthermore, in the cases shown in FIGS. 2 and 3(a), a rectangular sheet piece 1 was used, but as shown in FIG.
tape-like) sheet pieces 1, 1... are threaded 2 at 2
It is also possible to obtain a sheet F in which the sheet pieces 1 are arranged in parallel by R-arranging them at b. In this case, by color-coding the sheet pieces 1, it is possible to finish the sheet with a knitted pattern.

Furthermore, in each of the above embodiments, all the sheet pieces 1, 1
. The sheet pieces 1, 1 are sewn as shown in FIG. You may also do this.

This product has great air permeability due to the gaps 4, and is particularly suitable for summer clothing. Furthermore, the threads 2a and 2b in the gap 4 have a mesh-like appearance, resulting in a varied design.

In the embodiment shown in FIG. 5, the upper thread 2a and the lower thread 2
Knots 3 with b are provided in three places per stroke S of the zigzag stitch, as in the case of Fig. 1.
One of the three knots 3 is made in the sheet piece 1, and the other two are made in the gap 4 between the sheet pieces 1,1. Of course, the number of knots 3 and their positions are not particularly limited. Also, ftIj
In the embodiment shown in Fig. G, the strip-shaped sheet pieces 1 are arranged in the horizontal direction, but it goes without saying that they may be arranged in the vertical and horizontal directions. Each sheet piece 1 may be of the same color or may be of a different color to form a knitted pattern. Furthermore, although sheet pieces 1 of the same width are used in the embodiment shown in FIG. 6, sheet pieces 1 of different widths may be used in combination. In addition to the belt-shaped sheet piece 1, a rectangular sheet piece 1 as shown in FIG. 7 can also be used.

In each of the above-mentioned embodiments, in the embodiments shown in FIGS. 2 and 3, the end surfaces of all sheet pieces 1 are butted against each other, and in the embodiments shown in FIGS. Although a gap 4 is formed between the end faces of the sheet pieces 1, a combination of the two, that is, some of the sheet pieces 1 are made to have their ends abutted, and some of the other sheet pieces 1 are made to have a gap 4 between the end faces. The sheet pieces 1, 1 may be sewn together so that a gap 11114 is formed between them. Furthermore, in each of the above embodiments, by using colorful threads 2a and 2t+, it is possible to create an accented design with threads 2a and 2b. Further, the sheet piece 1 can be of any shape such as the above-mentioned rectangular shape, band shape, triangular shape, hexagonal shape, etc.

A large number of sheet pieces 1°1 obtained as described above...
A sheet with ・ sewn on it is formed by arranging sheet pieces 1, 1, etc., so by forming each sheet piece 1 in a different color, it is possible to create sheets with various color patterns. The sheet piece 1 can be finished and has a higher commercial value than the original sheet from which the sheet piece 1 was obtained, but it also has various other excellent features. In other words, each adjacent sheet piece 1 has its end faces facing each other, so there is no need for an overlapping allowance when sewing, and there is no loss in the size of the overlapping allowance; rather, the sheet pieces 1° When the end faces of sheet piece 1 are butted together, a slight gap is created at the butt-matching part, and the sheet piece 1
, 1, the gap 4 makes it possible to obtain a sheet larger than the total area of the sheet pieces 1. In addition, since there is no overlap, the thickness of the sewn part does not increase due to overlapping of the overlap, and the flexibility of the sheet piece 1 is maintained without becoming stiff in this area. be able to. Furthermore, as mentioned above, there is no overlap (sheet pieces 1, 1
Since the end faces of the sheets face each other, it is possible to prevent the sewn portion from distinguishing between the front and back sides of the sheet. In this case, if the front and back sides of the sheet piece 1 are formed with different colors or patterns, the sheet can be used on both sides with different color patterns. In addition, since the sheet pieces 1, 1 are sewn together with their end surfaces facing each other, the gap between the sheet pieces 1, 1 as described above can provide breathability to the sheet. Even if the sheet piece l is made of non-breathable material such as artificial leather, it is possible to impart breathability to the sheet. Since the sheet is formed by collecting the sheet pieces 1, 1..., it is possible to obtain a sheet of any size by increasing or decreasing the number of sheet pieces 1. If the sheet is made using a method such as the above, the width dimension will be limited, but it is possible to make the sheet arbitrarily wide by increasing the number of sheet pieces 1 sewn in the width direction. It is.

[Effects of the Invention] As described above, in the present invention, a plurality of sheet pieces are arranged so that the end surfaces of adjacent sheet pieces face each other, and each adjacent sheet piece is arranged so that one side of the end of the sheet piece Since the upper and lower threads are used to straddle the gap and the other side, the edges of each adjacent sheet piece are facing each other, and an overlap allowance is required when sewing. It is possible to obtain a sheet at a low cost because there is no loss of dimensions due to the overlap allowance, and since there is no overlap allowance, the thickness of the sewn part is reduced by overlapping the overlap allowance. The sheets do not become thick, and the sheet pieces retain their flexibility without becoming stiff in this area, making them suitable for clothing. In addition, since there is no overlapping allowance and the end surfaces of the sheet pieces face each other, it is possible to prevent the front and back of the sheet from being distinguished by the sewn portion. The sheet pieces are sewn together with their edges facing each other.
This allows air permeability to be imparted to the sheet between opposing end surfaces of the sheet piece. In addition, the upper thread and lower thread used to sew the sheet pieces are tied together with knots at a suitable number of locations, so even if the upper thread or lower thread are cut when the sheet is cut or washed, The fraying of the thread and bobbin thread stops at the knot, and the fraying does not progress any further, and the fraying of the upper thread and bobbin thread can cause the sheet pieces to come unstitched and come apart. This can be prevented.

[Brief explanation of drawings]

tjSi diagrams (a) and (b) are an enlarged top view and a cross-sectional view of a part of an embodiment of the present invention, FIG. 2 is a front view of a part of the same, and FIG. (a) and (b) are front views of a part of another embodiment same as above, and Fig. 4 (a) and (b) are upper thread and I
5(a) (+1) is an enlarged front view and a partially enlarged view of another embodiment of the present invention. 6 is a front view of a part of the same as above, FIG. 7 is a front view of a part of another embodiment of the same as above, and FIGS. 8(a) and 8(b) are partially cutaway perspective views of the conventional example. 9th
The figure is an enlarged view illustrating the state of conventional sewing machine sewing. 1 is a sheet piece, 2a is an upper thread, 2b is a lower thread, and 3 is a knot. (b) (.) Figure 5 Figure 6 Figure 7 Figure 9

Claims (6)

[Claims] (1) A plurality of sheet pieces are arranged with the end faces of adjacent sheet pieces facing each other, and each adjacent sheet piece has a straddle between one side and the other side of the edge of the sheet piece. A sheet that is sewn together by an upper thread and a lower thread, and the upper thread and the lower thread are connected by knots at an appropriate number of locations. (2) Claim 1, characterized in that the sewing of the sheet pieces with the upper thread and the lower thread is a zigzag stitch using a sewing machine.
Sheet with section description. (3) The sheet according to claim 2, wherein at least one knot is provided in a straight line portion of the zigzag stitch. (4) The sheet according to any one of claims 1 to 3, wherein the sheet piece is made of leather. (5) The sheet according to any one of claims 1 to 4, wherein a plurality of sheet pieces are arranged vertically and horizontally. (6) The sheet according to any one of claims 1 to 4, wherein the sheet pieces are formed in a band shape and arranged in parallel.