JP2004267248A - Manufacturing method of curtain and top welt seam device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent light leakage due to stitches of top welt seam, to prevent wrinkles and shrinkage in the case of a thin curtain, to prevent the position deviation of a core tape and a curtain cloth at the time of forming pleats and to make a top welt seam thread inconspicuous in a pleated curtain. <P>SOLUTION: In the top welt seam work of a curtain with three-peak pleats, a prescribed top welt seam width d (d<c) is set at a prescribed part of a part c to be the pleat of the curtain, top welt seam is performed only to the part of the curtain cloth 2, and the stitches of the top welt seam are limited to the part (c) of the pleat to be sectioned by the vertical thread of pleat sewing after curtain completion and do not appear at the width part (a) of the curtain 1. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a method of manufacturing a curtain and a side-stitching apparatus, in particular, to prevent light leakage due to the stitches of the side-stitching, to reduce the shear generated by the side-stitching in the case of a curtain made of thin fabric, A technique for preventing inconspicuousness, preventing misalignment between a core tape and a curtain fabric at the time of forming folds in the case of pleated curtains, and also making the awning thread inconspicuous in pleated curtains. .
[0002]
[Prior art]
In the curtain manufacturing process, a slightly hardened core tape made of polyester or the like is sewn over the entire width of the top of the curtain material with a cored sewing machine, and the curtain material is folded back so as to wrap the core tape. This work is called "Tenbushi". Then, the core tape is sewn between the curtain fabrics by a sewing machine. This work is called "Tenbushi sewing". Further, in the case of performing the top-down sewing, it is referred to as "top-down" including the top-down stitching, or is referred to as "top-down stitching".
[0003]
In general, the ceiling of a curtain is sewn to the top of the curtain material over the entire width. Then, the curtain fabric after the ceiling is folded in three windings from the top to the bottom in the width direction, and sewn along the inner edge of the front end of the folded portion by the ear stitch sewing machine. This work is called "ear stitching".
In the case of a curtain with folds, folds are sequentially formed on the curtain fabric where the ear stitching has been completed, and the folds are sewn by vertical stitching and side stitching by a fold stitch sewing machine. The process of sewing each fold with vertical stitching and horizontal stitching is called "fold stitching". Also, the entire operation from the formation of the folds to the sewing of the folds is called "pleating".
The folds are usually three or two folds. 2. Description of the Related Art A device that automatically forms folds on a curtain material, transports the folds to a sewing machine, and performs fold stitching is conventionally known (for example, see Patent Document 1).
[0004]
As described above, a typical curtain ceiling sewes the top of the curtain over the entire width. However, a curtain called a shading curtain, which is used to block light from entering the room even during the daytime, uses external light from the needle of the sewing needle formed along the seam when sewing with a sewing machine. In some cases, awning is not performed to prevent the leakage of the gas into the room.
Also, some curtains made of thin fabrics such as lace include wrinkles and shrinkage of the fabric that occurs along the thread of the alveolar stitch by performing the alveolar stitching (this is called "tray"). I hate something.
For curtains that do not embroider such as blackout curtains or curtains made of thin fabrics such as certain kinds of lace, after sewing the core tape, the curtain fabric is folded back so as to wrap the core tape, Ear stitching and fold stitching are performed without brace stitching.
[0005]
[Patent Document 1]
JP-A-2000-218081.
[0006]
[Problems to be solved by the invention]
As described above, in the case of a light-shielding curtain or a curtain such as a certain kind of lace, in some cases, the top-and-bottom stitch is not performed in order to prevent light leakage and fray. Further, even with ordinary curtains, there is a demand for eliminating the need to perform the tented sewing because the tented sewing thread is easily conspicuous. However, if the awning is not performed, especially in the case of a curtain with folds, the position of the core tape and the curtain material is shifted when folding the fold into three or two ridges to form the folds. There may be wrinkles around it.
[0007]
SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and can prevent light leakage due to a stitch of a top-stitch sewing in a curtain. In the case of a pleated curtain, it is possible to prevent the core tape and the curtain ground from being displaced during the formation of the pleated curtain. It is intended to be inconspicuous.
[0008]
[Means for Solving the Problems]
The present invention provides a method for manufacturing a curtain, which comprises performing a bottom stitching process only on a predetermined portion of a fold of a curtain.
In this method of manufacturing a curtain, a part of a part to be folded or a whole part of a part to be folded is set as a predetermined part, and a ceiling stitch is performed only on the part. Then, after the bottom stitching process, the folds are folded in the form of folds and sewn with vertical stitching and side stitching. When the shirring process is completed, the sewing machine formed along the stitches of the top stitching The stitches of the needle are limited to the folds separated from the width of the curtain by the vertical thread, and do not appear at the width of the curtain. For this reason, light does not leak from the stitches of the side-stitching, and even in the case of the light-shielding curtain, external light does not enter from the stitches of the side-stitching. Also, in the case of curtains made of thin fabrics such as laces, the awning stitching process is limited to the folds of the curtain, so the vines (wrinkles and shrinkage) generated along the awning sewing thread are small. Can be prevented, or the occurrence of fray can be prevented. Then, since the seams are sewn at the folds, it is possible to prevent displacement of the core tape and the curtain fabric at the time of forming the folds. Further, since the thread of the awning appears only at the folds, it becomes inconspicuous.
[0009]
Further, according to the method for manufacturing the curtain, the position of the top side sewing thread from the top of the curtain can be the same as the side sewing thread of the pleat sewing. In such a case, the top stitch overlaps with the side stitch and is less noticeable.
[0010]
Further, in the curtain manufacturing method, the same dimension data of the curtain is input to both the control device of the sewing machine for the top side stitch and the control device of the device for the shirring process, and the top side Sewing and shirring can be performed. In this case, the dimension data of the curtain can be input to one of the devices and transmitted online to the other. Alternatively, the information may be input to an input device such as a personal computer installed separately from the two devices, and transmitted to each device.
[0011]
Further, the present invention is a curtain top sewing machine, comprising: a sewing machine for a ceiling stitch; and a control device for controlling the sewing machine based on the input dimension data of the curtain. According to the present invention, there is provided a curtain top stitching apparatus which performs a top stitch sewing process only on a predetermined portion of a fold portion of a curtain by the sewing machine based on the dimension data of the curtain. The use of this curtain top stitching apparatus enables the above-described method to perform the top stitch only at a predetermined portion of the fold portion of the curtain (a part or all of the fold portion).
[0012]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
1 to 9 show an example of an embodiment of the present invention. FIG. 1 is a perspective view of the top of the curtain after finishing, FIG. 2 is an explanatory view of a state where a core tape is sewn on the curtain fabric in the top side sewing of the curtain, and FIG. FIG. 4 is an explanatory view of a state in which the top portion of the curtain is folded, FIG. 4 is an explanatory view of a sewing operation of the curtain, FIG. 5 is an explanatory view of a curtain pleating process, and FIG. 6 is a dimensional configuration before forming a curtain fold. , FIG. 7 is an explanatory view showing an example of the top side sewing position of the curtain, FIG. 8 is an explanatory view showing another example of the top side sewing position of the curtain, and FIG. 9 is an AA enlarged cross section of FIG. FIG. 10 and FIG. 10 are perspective views showing the structure of the top-and-bottom stitching apparatus.
[0013]
In this example, a case will be described in which a curtain having three ridges is finished as shown in FIG. In the curtain 1 shown in FIG. 1, the top portion (the upper portion in FIG. 1) of the curtain fabric 2 is folded back with a core tape 3 (not shown in FIG. 1) described later interposed therebetween, and a below-described sewing thread 4 described later. (It does not appear in FIG. 1), it is intermittently sewn on the side, and the end in the width direction (left and right in FIG. 1) is folded into three windings, sewn with ear sewing thread 5, and A plurality of pleats 6 are formed at predetermined intervals in the width direction. Each pleat 6 is folded into three ridges and sewn with a vertical sewing thread 7 and a horizontal sewing thread 8.
[0014]
In the manufacturing process of the curtain 1, as shown in FIG. 2, the core tape 3 is sewn over the entire width of the top portion of the curtain fabric 2 with the cored sewing thread 9 using a cored sewing machine (not shown). Then, as shown in FIG. 3, the curtain fabric 2 is folded (wrapped around) so as to wrap the core tape, and the core fabric 3 is sandwiched between the curtain fabrics 2, and a later-described ceiling sew device 10 (absorbent). Sewing is performed intermittently with a sewing thread 4 with a sewing machine). Then, as shown in FIG. 4, the both ends in the width direction are folded into three turns from top to bottom (for example, folded to a width of about 15 mm), and the folded portion is obtained using an ear stitch sewing machine (not shown). Sewn along the inner edge of the end with an ear sewing thread 5 (ear sewing). Then, pleating is performed. That is, three ridges 6 are sequentially formed on the curtain fabric 2 where the ear stitching has been completed, and the folds 6 are sewn together with the vertical stitch thread 7 and the horizontal stitch thread 8 by a fold stitch sewing machine (not shown) (fold stitch). .
[0015]
In the ceiling stitching process, sewing is performed with a ceiling stitch thread 4 over a predetermined width (a ceiling stitch width) only at a predetermined portion of a portion to be a fold 6 of the curtain 1. At that time, as described later, the width W of the curtain 1 after finishing, the width L of the curtain fabric 2, the number n of the folds 6 to be formed, the top width stitching width d, and the like are input to the control device 20. Based on the data, an interval a between the folds 6 and a width dimension c (c> d) of a portion necessary for forming the folds 6 (a fold forming portion) are calculated, and the bottom stitch is performed according to the numerical values. Is performed.
[0016]
As shown in FIG. 5A, the width W of the curtain 1 after finishing is defined as a between the folds 6 of the curtain 1 and the distance between the folds 6 of the curtain 1 and the dimension between the folds 6 at both ends and the end of the curtain 1. , W = a (n-1) + 2b, where n is the number of folds 6.
As shown in FIG. 5 (b), the folds 6 of the curtain 1 have both ends M of the fold formation portion (the portion having the width dimension c) as the start and end points of the folds 6, and T as the apex. , B are formed as three fold peaks.
In this case, the dimensional configuration of the curtain 1 before the formation of the folds 6 is as shown in FIG. 6, and the distance between the folds 6 and the folds 6 is a, and the size between the folds 6 at both ends and the end of the curtain 1 is b. The width L of the curtain material 2 before the formation of the folds 6 is represented by L = a (n-1) + 2b + nc, where n is the width dimension of the fold formation portion and n is the number of the folds 6.
[0017]
The part (predetermined part) to be sewn with the buffing thread 4 may be a part or the whole of the fold forming part (the part of the width dimension c) of the curtain 1. For example, as shown in FIG. Inside the width dimension c), a predetermined bounce width d (d <c) is set with the center of the pleat as a target axis. Then, the part of the top side sewing width d is sewn with the top side sewing thread 4. In this case, the stitches of the sewing machine needle (not shown) formed along the seam of the top side sewing thread 4 on the top part of the curtain 1 after the pleats are removed are formed by the vertical sewing thread 7 of the pleat sewing with the width part of the curtain 1 (folds and folds). (Corresponding to the portion of the interval a).), And does not appear in the width portion of the curtain 1. Therefore, even in the case of a light-shielding curtain, external light does not enter from the stitches of the top and bottom sewing. Further, in the case of a curtain made of a thin cloth such as a lace, since the awning process is limited to the folds 6 of the curtain 1, the unevenness generated along the awning thread 4 (wrinkles and shrinkage of the cloth) ) Can be small, or generation of fray can be prevented. Then, since the awning is performed at the folds 6, the displacement between the core tape 3 and the curtain fabric 2 during the formation of the folds can be prevented. Further, in any of the curtains, the bounce thread 4 appears only at the folds 6, so that it is less noticeable.
[0018]
As shown in FIG. 8, as a method of further reducing the appearance of the bottom thread in the case of three-fold folds, as shown in FIG. 8, the center of the fold is set inside the fold formation portion (the portion of the width dimension c). A bottom stitch width f smaller than １ ／ of the width C of the fold forming portion is set at two places on both sides centered on a position separated by a distance of about 幅 of the width C of the fold forming portion, This portion may be sewn with the thread 40. In this way, the thread 4 is completely hidden in the valleys of the pleats, and is completely invisible from the outside of the completed curtain 1 as shown in FIG. Normally, when intermittent sewing is performed, it is necessary to cleanly cut off the end of the sewing thread after sewing, but in the case of the tenon sewing shown in FIG. 8, the end of the tenon sewing thread 4 is also folded. Since it is hidden in the valley, it is not necessary to cut the end of the thread after sewing.
[0019]
Further, in this embodiment, the top side stitching is such that the position of the top side stitching thread 4 from the top of the curtain 1 (dimension e in FIGS. 7 and 8) is the same as the horizontal stitching thread 8 of the pleat stitching. By doing so, even if the top thread 4 is not completely hidden (for example, in the case of the setting shown in FIG. 7), the bottom thread 4 in the completed curtain 1 is a transverse seam 8 of a pleat stitch. Appears in a position overlapping with, and becomes less noticeable.
[0020]
The above-described side-stitching is performed, for example, using a sewing-side traveling-type side-stitching apparatus 10 shown in FIG. 10 (otherwise, a sewing machine fixed-type sewing apparatus can be used). The ceiling stitching apparatus 10 includes a cloth receiving table 12 fixed on the left and right machine stands 11, 11, a sewing machine running rail 12 mounted in parallel with the table 12, and running on the rail 12. The sewing machine is configured by a sewing head 14 (sewing machine) or the like for the prone operation. A cloth sensor 16 for detecting the curtain 2 is attached to a tip of a base 15 attached to the sewing machine head 14, and a length measuring encoder 18 is attached via a swingable blanket 17. ing.
[0021]
Before the ceiling, the core tape 2 is sewn to the top of the curtain fabric 2 with a core sewing machine (not shown). Then, in a state where the core tape 2 is folded so as to wrap the core tape 2, the cloth holders 19, 19 movably attached to the left and right sides of the table 12 along the sewing machine running direction so that the top portion is along the sewing machine running line. Fix it. At this time, the bent portion may be directed downward as shown, or the bent portion may be fixed facing upward.
[0022]
The running and sewing operations of the sewing head 14 are controlled by a control device 20 attached to the side surface thereof.
The controller 20 inputs the width W of the curtain 1 after finishing, the width L of the curtain fabric 2, the number n of the folds 6 to be formed, the top seam width d, and the like. Then, the control device 20 calculates the interval a between the folds 6 and the width dimension c (c> d) of a portion necessary for forming the folds 6 (fold formation portion) based on the data. Then, the running and sewing operations of the sewing machine head 14 are controlled in accordance with the numerical values, and the set curtain fabric 2 is subjected to a top-and-bottom stitching process, for example, in a state shown in FIG. In this case, in the example shown in FIG. 7, after the sewing head 14 has traveled by S1 from the start of travel, it performs a top-down stitch by a predetermined width of stitches d, and after traveling by S2 from the start of travel, again by a predetermined top The operation of performing the top-and-bottom stitching for the width of the stitching width d is repeated.
[0023]
In the curtain manufacturing process, the same curtain dimension data as that input to the control device 20 of the top-down sewing device 10 is also input to the control device of a device for unfolding (not shown), and the same dimension is input. The shirring processing may be performed based on the data. In this case, the curtain dimension data can be input to one of the devices and transmitted online to the other.Also, the data can be input to an input device such as a personal computer installed separately from both devices, and the data can be sent to each device. You may make it transmit.
[0024]
Further, in the example of FIG. 7, the ear stitching is performed before the ceiling stitching, but the ear stitching may be performed after the ceiling stitching. In this case, the dimension b between the folds 6 at both ends and the end of the curtain shown in FIGS. 6 and 7 is input as the dimension of the developed length before folding both ends in the width direction into three windings. Also, the dimensions of S1 and S2 in FIG. 7 are long dimensions that incorporate the unfolded length before folding into three windings.
In addition, the pleating process may be performed by using a normal sewing machine, instead of automatically determining the pleating position and forming the pleated portion, and using a device for performing the pleat sewing. In this case, using the top-down sewing device of the present invention, the top-down sewing position (position of the top-down sewing width d) shown in FIG. 7 and the top-down sewing position (the position of the top-down sewing width f) shown in FIG. After folding the seams, fold them by hand into three or two ridges so that the center of each sew position is the center of the fold 6, and sew the folds with a normal sewing machine become.
[0026]
【The invention's effect】
As is apparent from the above description, according to the present invention, it is possible to prevent light leakage due to the stitches of the top side stitch in the curtain, and it is possible to prevent the leakage caused by the top side stitch in the case of the curtain made of thin cloth. In the case of a pleated curtain, it is possible to prevent the core tape and the curtain ground from being displaced during the formation of the pleated curtain. It can be inconspicuous.
[Brief description of the drawings]
FIG. 1 is a top perspective view of a finished curtain according to an embodiment of the present invention.
FIG. 2 is an explanatory view showing a state in which a core tape is sewn on a curtain fabric in a top-down sewing process of the curtain shown in FIG. 1;
FIG. 3 is an explanatory view showing a state in which a top portion of a curtain fabric is folded back with a core tape interposed in a top-down sewing process of the curtain shown in FIG. 1;
FIG. 4 is an explanatory diagram of an ear sewing operation of the curtain shown in FIG. 1;
5 (a) and 5 (b) are explanatory views of the pleating process of the curtain shown in FIG. 1, wherein (a) shows a dimensional configuration and (b) shows a pleated structure.
FIG. 6 is an explanatory diagram showing a dimensional configuration before forming a fold of the curtain shown in FIG. 1;
FIG. 7 is an explanatory diagram showing an example of a position for sewing the top of the curtain shown in FIG. 1;
FIG. 8 is an explanatory view showing another example of the position of the top and bottom sewing of the curtain shown in FIG. 1;
FIG. 9 is an enlarged sectional view taken along the line AA of FIG. 1;
FIG. 10 is a perspective view showing a configuration of a top-down sewing device according to the embodiment of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Curtain 2 Curtain base 3 Core tape 4 Tensile sewing thread 5 Ear sewing thread 6 Plait 7 Vertical sewing thread 8 Horizontal sewing thread 9 Cored sewing thread 10 Tendon sewing apparatus 11 Machine base 12 Table 13 Rail 14 Sewing head 15 Base 16 Fabric sensor 17 Bracket 18 Measurement encoder 19 Fabric holder 20 Controller

Claims (4)

A method for manufacturing a curtain, comprising: performing a seam-top stitching process only on a predetermined portion of a fold of a curtain. 2. The method of manufacturing a curtain according to claim 1, wherein the position of the broom stitch from the top of the curtain is the same as the position of the cross stitch of the pleat stitch. The same dimension data of the curtain is input to both the control device of the sewing machine for the top side stitching and the control device of the device for the shirring process, and performs the top side stitching process and the shirring process based on the same size data. The method for producing a curtain according to claim 1. What is claimed is: 1. A curtain side-stitching apparatus, comprising: a sewing machine for side-by-side sewing; and a control device for controlling the sewing machine based on the input dimension data of the curtain, wherein the dimension data of the curtain input to the control device. The sewing machine according to claim 1, wherein the sewing machine performs a top sewing process only on a predetermined portion of a fold of the curtain.

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