JP3908051B2 - Sewing cloth guide structure - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a cloth guide structure for a sewing machine, and more particularly, to a cloth guide structure for a sewing machine for folding an edge tape with a tape binder and sewing the tape to the edge of a sewing fabric.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, when sewing clothes, piping (edge winding) is performed in which a cloth tape such as a neck or a cuff is wrapped with another cloth tape and sewn. In this piping, as shown in FIG. 6, the cloth tape is generally folded in two (FIG. 6 (a)), three (FIG. 6 (b)), and four (FIG. 6 (c)). The body cloth 50 is sandwiched between the folding tapes 60A, 60B, and 60C folded in this way and is sewn with a sewing machine. However, a bias tape made by cutting the cloth diagonally may be used. In addition, as a cloth tape used for piping, a common cloth or another cloth is used.
[0003]
In order to perform this piping, as shown in FIGS. 7A and 7B, a cloth tape cut to a width necessary for finishing to a predetermined winding width is passed through a tape binder 300 having a predetermined dimension. As a result, it is pulled out to a predetermined number of turns, and is sewn together with the cloth 50 in between. The tape binder 300 is attached so as to supply a folding tape 60 that is folded at a predetermined number of turns from the right direction about 90 degrees with respect to the sewing feed direction Y of the sewing machine when viewed from the front of the sewing machine. Generally, it is attached to the bed upper surface 100 so as to be inclined toward the sewing needle position.
[0004]
Since the folding tape 60 is folded back at approximately 90 degrees at the tape outlet of such a tape binder 300, it is convenient to insert the cloth 50 between the folding tapes 60 folded at a predetermined number of turns. Therefore, in any case where the cloth tape is folded in two, three or four, the cloth 50 is sandwiched while the folded tape 60 is pulled out, and between the needle plate 200 on the bed upper surface 100 and the cloth presser 400. Can be held between the feed dog (not shown) protruding from the feed dog hole of the needle plate 200 and the presser foot 400, conveyed, and sewn.
[0005]
[Problems to be solved by the invention]
However, when performing such piping, the folded tape 60 folded by the tape binder 300 is folded back at approximately 90 degrees at the tape outlet of the tape binder 300 and is turned in the sewing feed direction. When the cloth 50 is drawn between the tape 60 and pulled between the throat plate 200 and the cloth presser 400, it is led from the tape binder 300 to the tip of the presser foot 400 with a steep inclination. There was a difficulty that the tape feed angle α would become large. When the tape feeding angle α is large, the folding tape 60 bent evenly up and down is led from the tape binder 300 to the tip of the presser foot 400 at a steep slope. Since the cloth 50 is suddenly fed in the horizontal direction, the cloth 50 may stretch locally in the thickness direction, and the cloth 50 may be sewn in a horizontal curved line. If this occurs, the folding width of the folding tape 60 may be deformed or the sewing position may be distorted.
[0006]
Moreover, since the body part of the cloth 50 to which the folding tape 60 is sewn is cut into a curved state, it must be sewn along the curve of the body part of the cut cloth 50, and the sewer can make a straight line. When the cloth 50 is sandwiched between the folding tapes 60 bent into the edge winding shape drawn out to the state and the sewing work is performed along the curve of the body part of the cut cloth 50, the above-mentioned difficulty causes the sewing up. The quality of the fabric was greatly deteriorated, and the sewing operation of the cloth was extremely difficult even during the sewing work.
[0007]
The present invention has been made to solve the above-described conventional problems, and is a sewing cloth for smoothly guiding a plurality of piping folding tapes and a sewing fabric from a tape outlet of a tape binder toward a presser foot. An object is to provide a guide structure.
[0008]
[Means for Solving the Problems]
The cloth guide structure of the sewing machine according to the present invention that achieves the above object is provided by inclining a plurality of folded tapes that are provided on the needle plate at an inclination on the needle plate and fed at a tape feed angle from the tape binder. The direction is changed to the direction of the sheet, and it is nipped between the presser foot and the throat plate, the feed dog protrudes from the feed dog hole of the throat plate and continuously feeds out, and multiple folded tapes are taped to the edge of the sewing fabric. Cloth guide structure for a sewing machine that is in contact with the upper surface of a multi-fold tape fed from a tape binder and maintains the multi-fold form, and the cloth presser that feeds the cloth in the sewing feed direction in cooperation with the feed dog It has a cloth guide that guides the cloth by changing the tape feeding angle to the sewing angle with the tape together with the sewing cloth on the gold, and the cloth guide is integrated with the cloth presser that feeds the cloth in the sewing feed direction in cooperation with the feed dog. It is structured .
[0009]
According to such a cloth guide structure of the sewing machine, in a state in which a plurality of folded tapes fed at a tape feeding angle that falls at a steep inclination angle from the tape binder is changed in the sewing feeding direction and overlapped on the sewing fabric. Before holding between the presser foot and the throat plate, if the cloth guide part touches the upper surface of the multi-fold tape fed from the tape binder and maintains the multi-fold form, it cooperates with the feed dog. Since the cloth feed can be guided to the cloth presser foot that feeds the cloth in the sewing direction together with the sewing fabric by converting the tape feeding angle to the taped sewing angle, the multi-fold tape can be steeply inclined from the tape binder together with the sewing cloth. Since the tape feeding angle can be lowered to a tape-sewing angle that can be lowered at a slant angle, the tape can be guided between the presser foot and the throat plate. Prevent shrinkage It can be.
[0010]
In the cloth guide structure for a sewing machine according to the present invention, the cloth guide portion is preferably interposed between the tape binder and the cloth presser foot. Thereby, the tape feeding angle of the multi-fold tape fed from the tape binder can be converted to the tape attaching sewing angle without any trouble.
[0011]
Further, in the cloth guide structure of the sewing machine of the present invention, the cloth guide portion is arranged at an upper stage with respect to the cloth presser that feeds the cloth in the sewing feed direction in cooperation with the feed dog between the tape binder and the presser foot. It is preferable. Thereby, the tape feeding angle of the multi-fold tape fed from the tape binder can be converted to the tape attaching sewing angle without any trouble.
[0012]
Further, the fabric guide portion in the fabric guide structure of the sewing machine of the present invention, by being cloth presser foot constructed integrally with the cloth feeding the feed dog and cooperates with sewing feed direction, the cloth presser foot tape binder Since the folding width accuracy can be improved, it is possible to provide a stable cloth guide even with a wide number of folded tapes. be able to.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, a preferred embodiment of a cloth guide structure for a sewing machine according to the present invention will be described with reference to the drawings.
[0014]
As shown in FIGS. 2 and 3, the cloth guide structure of the sewing machine according to the present invention is provided on the needle plate 2 so as to be inclined on the needle plate 2 on the sewing cloth 50 and from the tape binder 3 to the tape feeding angle α (FIG. 1). For example, the four-fold tape 60 </ b> C (FIG. 6C) fed in (b)) is superposed by changing the direction in the sewing feed direction Y and sandwiched between the presser foot 4 and the needle plate 2. The feed dog 5 protrudes from the second feed dog hole 2a and continuously feeds out, and a four-fold tape 60C can be taped and sewn to the edge of the sewing fabric 50.
[0015]
The tape binder 3 used in this cloth guide structure supplies, for example, a four-fold tape 60C wound at a predetermined number of turns from approximately 90 degrees to the sewing feed direction Y of the sewing machine as viewed from the front of the sewing machine in FIG. It is attached to the bed upper surface 10 so as to be inclined from the right direction toward the sewing needle position. When this attachment method is attached to the bed upper surface 10, an attachment method by screwing that can finely adjust the attachment position by trial sewing is suitable, but may be appropriately changed according to the attachment part. The cloth tape 6 supplied to the tape binder 3 is wound at a predetermined number of turns on a tape supply unit (not shown) installed in the sewing machine so as to be located on the right side of the tape binder 3. It is supplied to the tape binder 3 without being twisted from the supply unit.
[0016]
As shown in FIGS. 4A and 4B, the structure of the tape binder 3 for such a four-fold tape includes a tape insertion portion 3a for inserting the fabric tape 6 supplied from the tape supply portion, and a tape A first tape bent portion 3b that bends both edges in the width direction of the cloth tape 6 inserted into the insertion portion 3a, and a bending direction of the center portion in the width direction of the cloth tape 6 by the first tape bent portion 3b. And a second tape bent portion 3c for reverse folding. Moreover, when the tape binder 3 is attached to the bed upper surface 10 as described above, the tape outlet ends of the first tape bent portion 3b and the second tape bent portion 3c are in contact with the first tape bent portion 3b. When the fabric tape 6 folded at the portion 3b and the second tape bending portion 3c is pulled out and folded at about 90 degrees from the sewing feed direction Y, that is, pulled out from the pulling direction, the center in the width direction of the fabric tape 6 is drawn. It is formed in a structure that can be folded into a four-fold tape 60C that is folded into an edge winding shape as shown in FIG.
[0017]
In addition, as shown in FIGS. 1A and 1B, the cloth guide structure of the sewing machine of the present invention is in contact with the upper surface of the four-fold tape 60C fed from the tape binder 3 as described above, While maintaining the form, the cloth presser 4 that feeds the cloth in the sewing feed direction Y in cooperation with the feed dog 5 (FIG. 3) converts the tape feeding angle α together with the sewing cloth 50 to the taped sewing angle β and the cloth. A cloth guide unit 40 for guiding is provided. Here, the tape feeding angle α is a feeding angle of the four-fold tape 60C fed from the tape binder 3 with the upper surface of the needle plate 2 as a reference surface, and the tape sewing angle β is the upper surface of the needle plate 2 Is a cloth guide angle of the four-fold tape 60C guided by the cloth guide portion 40 and guided between the cloth presser 4 and the needle plate 2. Specifically, the cloth guide portion 40 works against the presser foot 4 that feeds the cloth in the sewing feed direction Y in cooperation with the feed dog 5 (FIG. 3) between the tape binder 3 and the presser foot 4. For example, it is configured integrally with the presser foot 4 so as to be arranged in the upper stage. As a result, the tape feeding angle α of the four-fold tape 60C fed from the tape binder 3 can be converted into the tape attaching sewing angle β without any trouble, and is configured integrally with the presser foot 4. Therefore, since the tape binder 3 can be brought close to the presser foot 4, the folding width accuracy can be improved, and the tape attaching sewing angle β is always constant, so that stable sewing quality can be secured. Therefore, a stable cloth guide can be obtained even with a plurality of folded tapes wound in a wide width, and even a tape for trimming a knitted fabric which is difficult to wind can be bent sufficiently.
[0018]
In the cloth guide structure of the sewing machine configured as described above, when sewing is started by setting the cloth tape 6 supplied from the tape supply unit and the sewing fabric 50 of the body on the sewing machine in a pipeable state, the tape supply unit After the cloth tape 6 to be supplied is inserted into the tape insertion part 3a of the tape binder 3, both edges in the width direction of the cloth tape 6 are bent at the same width by the first tape bending part 3b, and the second tape folding is performed. The bent portion 3c is folded in the direction opposite to the folding direction of the first tape bent portion 3b at the center of the cloth tape 6 in the width direction. When the fabric tape 6 bent in this way is further bent by about 90 degrees from the sewing feed direction Y, that is, the pulling direction from the tape binder 3, the first tape bent portion 3b and the second tape are drawn. The folding of the central portion in the width direction of the cloth tape 6 is turned upside down by the tape outlet tip of the bent portion 3c to form a four-fold tape 60C which is bent into an edge winding shape as shown in FIG.
[0019]
The four-fold tape 60 </ b> C is fed between the needle plate 2 on the bed upper surface 10 and the cloth presser 4 with the sewing cloth 50 being pulled out, and the feed dog 5 and the cloth protruding from the feed dog hole 2 a of the needle plate 2. It is clamped and conveyed with the presser foot 4 and sewn. At this time, the presser foot 4 in a state in which the four-fold tape 60C fed at a tape feeding angle α that descends from the tape binder 3 at a steep inclination angle is changed in the sewing feeding direction Y and is superposed on the sewing fabric 50. Before being sandwiched between the needle plate 2 and the needle guide 2, the cloth guide 40 integrally formed with the cloth presser 4 is brought into contact with the upper surface of the four-fold tape 60 </ b> C fed from the tape binder 3 and is folded in four. While maintaining this form, the cloth presser 4 which feeds the cloth in the sewing feed direction Y in cooperation with the feed dog 5 converts the tape feeding angle α together with the sewing cloth 50 to the taped sewing angle β and guides the cloth. As a result, the four-fold tape 60C is converted from the tape feeding angle α that is lowered from the tape binder 3 together with the sewing fabric 50 at a steep inclination angle to a tape attaching sewing angle β that can be lowered at a gentle inclination angle. Therefore, it is possible to prevent expansion and contraction in the thickness direction of the cloth of the four-fold tape 60C.
[0020]
In the above-described cloth guide structure of the sewing machine of the present invention, the cloth guide portion 40 is integrally formed with the presser foot 4. However, the present invention is not limited to this, and the tape binder 3 and the presser foot 4 are not limited thereto. If the tape feeding angle α of the four-fold tape 60C fed from the tape binder 3 can be converted into the tape attaching sewing angle β without any trouble, for example, as shown in FIG. The cloth guide 40 'may be provided at the tip of the arm 12 fixed to the frame 11 of the sewing machine body so as to be arranged at the upper stage with respect to the cloth presser 4 that feeds the cloth in the sewing feed direction Y. In addition, you may provide in a sewing machine arm part, a sewing machine bed part, the presser bar 13, the presser foot part 14, and the tape binder 3.
[0021]
Moreover, in the cloth guide structure for the sewing machine of the present invention described above, a tape binder capable of forming the four-fold tape 60C is used. However, the present invention is not limited to this, and a plurality of folded tapes such as two-fold and three-fold can be formed. Even if the tape binder is used, the tape feeding angle α can be converted to the tape attaching sewing angle β.
[0022]
The sewing machine to which the cloth guide structure of such a sewing machine is applied is, for example, a flat stitch sewing machine having two sewing needles 7A and 7B and one looper 8 as shown in FIG. Any sewing machine may be used as long as the sewing machine has a structure capable of piping such as a double-ring stitch machine.
[0023]
【The invention's effect】
As described above, according to the cloth guide structure for a sewing machine of the present invention, a tape that can be lowered at a gentle inclination angle from a tape feeding angle at which a multi-fold tape is lowered together with a sewing fabric from a tape binder at a steep inclination angle. It can be converted into a stitching angle and guided between the presser foot and the needle plate. Therefore, the expansion and contraction in the thickness direction of the cloth of the multi-fold tape can be prevented.
[Brief description of the drawings]
1A and 1B are diagrams showing a preferred embodiment of a sewing machine cloth guide structure according to the present invention, in which FIG. 1A is a side view of the sewing machine attached to the sewing machine, and FIG.
FIG. 2 is an overall perspective view showing a preferred embodiment of the sewing machine cloth guide structure according to the present invention.
FIG. 3 is an exploded perspective view showing a main part of a cloth guide structure for a sewing machine according to the present invention.
4A and 4B are diagrams showing a tape binder, where FIG. 4A is a perspective view, and FIG. 4B is a side view.
FIGS. 5A and 5B are diagrams showing another preferred embodiment of the sewing machine cloth guide structure according to the present invention, in which FIG. 5A is a side view of the sewing machine attached to the sewing machine, and FIG.
6A and 6B are diagrams illustrating types of piping, in which FIG. 6A is a perspective view of two folds, FIG. 6B is a perspective view of three folds, and FIG. 6C is a perspective view of four folds.
7A and 7B are diagrams illustrating a conventional sewing machine cloth guide structure, in which FIG. 7A is a side view of the sewing machine attached to the sewing machine, and FIG.
[Explanation of symbols]
2 ... Needle plate 2a ... Feed tooth hole 3 ... Tape binder 40, 40 '... Cloth guide part 60A ... Two-fold tape 60B ... Three-fold tape 60C ... Four-fold tape Y ················· Sewing feed direction α ··· Tape feed angle β ··········· Sewing angle with tape

Claims (3)

A plurality of folded tapes, which are provided on the needle plate at an inclination on the needle plate and are fed at a tape feed angle from the tape binder, are changed in the direction of sewing feed and overlapped, and the presser foot and the needle plate A sewing machine cloth guide structure in which the feed dog protrudes continuously from the feed dog hole of the needle plate and continuously feeds out, and the plurality of folded tapes are taped and sewn to the edge of the sewing fabric,
The sewing fabric is applied to the presser foot that contacts the upper surface of the multi-fold tape fed from the tape binder and feeds the cloth in the sewing feed direction in cooperation with the feed dog while maintaining a multi-fold form. And a cloth guide for guiding the cloth by converting the tape feeding angle into a taped sewing angle, and the cloth guide cooperates with the feed dog to feed the cloth in the sewing feed direction. A cloth guide structure for a sewing machine, characterized in that it is constructed integrally with the sewing machine.   2. The cloth guide structure for a sewing machine according to claim 1, wherein the cloth guide portion is interposed between the tape binder and the cloth presser foot.   The cloth guide portion is arranged in an upper stage with respect to the cloth presser that feeds cloth in the sewing feed direction in cooperation with the feed dog between the tape binder and the cloth presser. The cloth guide structure for a sewing machine according to claim 1.

Images