JP2009195578A - Method for sewing belt-shaped object - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for sewing a belt-shaped object which is capable of shortening the cut end of a belt-shaped object with the use of a simple method. <P>SOLUTION: The expansible belt-shaped object T is sewn to an opening peripheral edge part 71 in a tension state, while being supplied by a pair of supply rollers 50 and 51 to the opening peripheral edge part 71 of a bag shape fabric 70. When a sewing position reaches the sewing end part Ts of the belt-shaped object T in the opening peripheral edge part 71, the supply of the belt-shaped object T is stopped, and then, tension force in a direction opposite to the supply direction is imparted to the belt-shaped object T. Thus, the belt-shaped object T is cut in the neighborhood of the sewing end part Ts. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a method for sewing a belt-like material in which an elastic belt-like material such as rubber is sewn on the peripheral edge of an opening of a tubular fabric such as a brief, a swimsuit, or jogging pants.

  A typical prior art of a sewing machine for sewing elastic band-like bodies such as rubber to a peripheral edge of an opening such as a waist part or a left and right crotch part in a tubular fabric such as a brief or a jogging pant is a patent Documents 1-3 show. FIG. 10 is a perspective view of a sewing machine 1 similar to that shown in Patent Document 3. As shown in FIG. The sewing machine 1 shown in FIG. 10 is configured such that a belt body supply means 2 for supplying a belt body such as a rubber tape T is provided on a sewing machine body 8 which is an overlock sewing machine. The belt-like material supply means 2 has a large roller 4 and a small roller 5 in the supply section. The large roller 4 is rotationally driven by a stepping motor 6 via a timing belt 7, and the small roller 5 is elastically applied to the large roller 4. Abut and rotate. Such a belt-like material supply means 2 is provided above the needle plate 9, and a belt-like material feeding device (not shown) is provided above the sewing machine 1. This belt-like material feeding device rotatably supports a reel around which a rubber tape T which is a belt-like material is wound, and the rubber tape T unwound from the reel is a large roller 4 and a small roller of the belt-like material supply means 2. 5, the large roller 4 is rotationally driven and supplied toward the lower needle plate 10.

  A presser foot 10 is disposed on the needle plate 9, and the presser foot 10 is provided with a belt-shaped material guide port 11 into which the rubber tape T supplied from the belt-shaped material supply means 2 is inserted. The rubber tape T inserted into the belt-shaped object guide port 11 is sent out under the presser foot 10.

  Further, the needle plate 9 is formed with a feed groove (not shown) extending in the cloth (fabric) feed direction A, and the feed dog is disposed on the upper surface of the needle plate 9 in such a manner that the feed dog can be projected and retracted. The fabric sandwiched between the presser plate 12 and the needle plate 9 of the presser foot 10 is fed out in the fabric feed direction A by making an elliptical motion in the feed groove in the feed groove. Further, a knife device (not shown) that cuts the dough to be fed and aligns the ends of the dough is provided on the side of the needle plate 9.

  When sewing the rubber tape T, the operator sets the cloth under the rubber tape T supplied to the belt-shaped object guide port 11 of the belt-shaped object 10 of the presser foot 10 and drives the sewing machine 1 to perform sewing. When the sewing machine 1 is driven, the side of the fabric is fed while being cut by the knife device, and the rubber tape T is supplied and the rubber tape T can be sewn along the end of the fabric. Further, by delaying the feed speed of the stepping motor 6 for supplying the rubber tape T from the feed speed of the fabric, a constant tension is applied to the rubber tape T between the rollers 4 and 5 and the needle drop position, and in a tension state. The rubber tape T is sewn on the fabric.

  In this manner, the rubber tape T is sewn along the peripheral edge of the opening of the cloth, and when the sewing of the rubber tape T is completed after making a round of the peripheral edge of the opening, the knife disposed below the large roller 4 and the small roller 5. The rubber tape T is cut with the device 3. The operator continuously performs such rubber attaching work.

Japanese Patent Publication No. 63-60679 JP-A-7-51478 Japanese Patent No. 3735768

  FIG. 11 shows an example of a brief in which the rubber tape T is sewn on the peripheral edge of each opening by the sewing machine 1 described above. In the brief 20 of FIG. 11, the state immediately after sewing of the rubber tape T and cutting of the rubber tape T is performed at the waist portion (opening peripheral portion) 21, and the rubber tape T at the left and right crotch portions (opening peripheral portions) 22 and 23. After cutting and cutting the rubber tape T, the cutting end (cutting margin) is further cut off. The rubber tape T is sewn at the waist portion 21 while the brief 20 as a tubular fabric is circulated and moved, and as a result, a seam is formed along the direction a. When the sewing portion of the rubber tape T goes around, the rubber tape T is cut by the female device 3 as described above. At the time of this cutting, as shown in the drawing, the cut end Te of the rubber tape T remains at the end of sewing, and then the cut end Te is cut off and discarded. The length L of the cut end Te is usually about 4 cm, and the actual situation is that the amount of the rubber tape T to be discarded cannot be ignored in a sewing factory where a large amount of briefs 20 are sewn. In addition to increasing the material cost, a drastic solution is desired from the viewpoint of resource saving.

  In Patent Document 1, when the starting end of the rubber tape approaches the sewing position, the rubber tape is cut, the pressing plate is actuated, the sewing is continued with the brake applied to the cutting end, and the cutting end is pulled. And sew on the fabric. If the end portion of the rubber tape is sewn in this manner, the cut end portion to be discarded does not occur as described above, and the cut end portion is also sewn in a tension state. However, depending on the degree of adjustment of the braking force by the pressing plate, the tensioned state at the cut end and the tensioned state at the other part are different, and the user may feel uncomfortable when wearing the body. Further, it is difficult to completely match the sewing start end portion and the end end portion of the rubber tape, and depending on the degree of the mismatch, it is expected to cause a problem in the quality of the product.

  Further, Patent Document 2 describes that the tape feed amount is changed by reducing or reversing the rotation speed of the tape feed motor at the time of sewing, and gathering is performed over an arbitrary length range of the fabric. . However, the rotation speed or reverse rotation control of the tape feed motor in Patent Document 2 is only for gathering, and is not intended for processing the cut end of the tape.

  Further, Patent Document 3 discloses a so-called non-tensioned part by bringing the belt-like material feeding means closer to the sewing position immediately before the end of sewing of the rubber tape, and then cutting the rubber tape and sewing the cut end as it is to the fabric. Is described as shortening. In this case, a cut end portion to be discarded does not occur, but it is inevitable that some non-tensioned portions remain. Moreover, the mechanism for bringing the belt-like supply means disclosed in Patent Document 3 closer to the sewing position is constituted by a belt-like supply moving cylinder that moves up and down the whole belt-like supply means including a driving means such as a stepping motor. For this reason, the apparatus becomes large and cannot be applied to an existing sewing machine.

  The objective of this invention is providing the sewing method of the strip | belt-shaped object which can shorten the cutting | disconnection edge part of a strip | belt-shaped object with a simple method.

The method for sewing a belt-like material according to the present invention is a method for sewing a belt-like material by sewing a belt-like material to the peripheral edge of the opening while supplying a stretchable belt-like material to the peripheral edge of the opening of the tubular fabric by a pair of supply rollers. Because
When the sewing position reaches the sewing end portion of the belt-like object at the peripheral edge of the opening, the supply of the belt-like object is stopped, and then the sewing is performed with a tensile force in the direction opposite to the supply direction applied to the belt-like object. A belt-like material sewing method characterized by cutting a belt-like material in the vicinity of a wearing end portion.

  Further, in the present invention, the application of the tensile force to the band after the supply is stopped is performed by rotating the supply roller pair in a direction opposite to the supply direction of the band after the supply roller pair is stopped. Features.

  According to the sewing method of the belt-like object of the present invention, the stretchable belt-like object is successively sewn to the opening peripheral edge of the belt-like object while being supplied by the supply roller pair. At this time, the belt-like object is sewn in a state in which tension is applied over the circumferential direction of the opening peripheral edge. And, when the sewing reaches the sewing end portion of the belt-like object at the peripheral edge of the opening, after the supply of the belt-like object is stopped, a tensile force in the direction opposite to the supply direction is applied to the belt-like object; In addition, since the belt-like object is cut in the vicinity of the sewing end portion, the belt-like body extends between the sewing end portion and the supply roller pair in the state immediately before the cutting, and the end of the sewing is performed by cutting. The cutting end portion which becomes the cutting margin portion remaining in the portion contracts. Although this cut end is excised and discarded, it is shortened due to shrinkage. Therefore, even if a large amount of sewing is performed, the amount of band-like material discarded is significantly less than in the prior art.

  In addition, if the supply of the tensile force to the strip after the supply is stopped is performed by rotating the supply roller pair in a direction opposite to the supply direction of the strip after the supply roller pair is stopped, The application of tensile force is simple and effective. Moreover, since it is possible to perform the process of shortening the cut end of the belt-like object by simply changing the operation program without changing the design of the existing sewing machine, the existing sewing machine can be It is extremely beneficial for the user who uses it.

  FIG. 1 is a perspective view of a sewing machine 30 to which a belt-like material sewing method according to an embodiment of the present invention is applied. The sewing machine 30 is configured by attaching a belt-like material supply means 32 to a sewing machine main body 31 that is a flat stitch sewing machine. In this embodiment, the sewing machine 30 supplies a rubber tape T as a stretchable belt-like material, for example, a waist such as a brief or a jogging pant. This is used when rubberizing the peripheral edge of the opening, such as the periphery or crotch.

  A needle plate 36 is disposed horizontally on the cylinder bed portion 35 of the sewing machine body 31, and a presser foot 37 is disposed on the needle plate 36. The presser foot 37 is pivotally supported by the sewing machine main body 31, and the presser foot 37 is further biased downward by a torsion spring (see FIG. 2) 38. The needle plate 36 under the presser foot 37 is formed with a needle drop portion (not shown) through which the needle 39 (see FIG. 2) is inserted and a feed groove (not shown) extending in the cloth (cloth) feed direction A. In this feed groove, the ellipse moves freely on the upper surface of the needle plate 36 in synchronism with the vertical reciprocation of the needle 39 in the feed groove, and the cloth on the needle plate 36 is fed in the cloth feed direction A. Teeth (not shown) are provided. Further, a knife device 40 (see FIG. 2) that cuts and trims the edge of the cloth to be fed is provided in the vicinity of the presser foot 37 in the cloth feeding direction A upstream side (right side in FIG. 2).

  A belt-like material supply means 32 is attached to the front surface of the sewing machine body 31. The belt-like material supply means 32 includes a supply portion 53 including a pair of belt-like material supply rollers (a large roller 50 and a small roller 51) and a knife device 52, and a stepping motor 55 as a drive source. A tape feeding device (not shown) for supplying the rubber tape T to the supply roller pair 50, 51 is provided above the belt-like material supply means 32, and the rubber tape T is moved by the feeding action of the supply roller pair 50, 51. Supplied toward the needle entry position.

  FIG. 2 is a side view of the belt-like material supply means 32, and FIG. 3 is a schematic cross-sectional view taken along the section line III-III in FIG. The stepping motor 55 is held by a motor mounting base 60, and the motor mounting base 60 is attached to a roller device mounting base 61 (not shown in FIGS. 2 and 3). A timing pulley is fixed to the output shaft of the stepping motor 55, and a timing pulley (both not shown) rotates via the timing belt. The timing pulley is connected to the large roller 50 via a shaft (not shown). Thereby, the large roller 50 can be rotationally driven by the stepping motor 55. The small roller 51 is pivotally supported by the roller link 62 and elastically contacts the large roller 50 via a torsion spring (not shown). Further, when the operator pushes a roller push lever (not shown) connected to the roller link 62, the roller link 62 is pulled up and the small roller 51 can be separated from the large roller 50. Therefore, in order to set the rubber tape T, the rubber tape T is inserted into the gap with the large roller 50 in a state where the small roller 51 is separated, and the small roller 51 is returned to the original state.

  Since the outer surfaces of the large roller 50 and the small roller 51 are knurled, the rubber tape T can be securely held between the large roller 50 and the small roller 51. Further, when the large roller 50 is rotationally driven by the stepping motor 55, the rubber tape T held between the large roller 50 and the small roller 51 is sent downward while the small roller 51 is driven to rotate.

  A tape sensor 56 realized by an optical detector such as a photo interrupter is installed on the roller device mounting base 61 of the belt-like material supply means 32. A reflection plate 57 is attached in the vicinity of the upstream side of the needle plate 36 in the cloth feeding direction A. The reflection plate 57 is positioned on the optical path of the light emitted from the light emitting element 56 a of the tape sensor 56, and is configured such that the reflected light is directed to the light receiving element 56 b of the tape sensor 56.

  A knife device 52 is attached immediately below the large roller 50 and the small roller 51. The knife device 52 is composed of a fixed knife 52A and a moving knife 52B. The rubber tape T passes between them and is sent out, and the rubber tape T can be cut by operating the moving knife 52B at the end of sewing. it can. The moving knife 52B is driven by a cylinder (not shown). The presser foot 37 is provided with a belt-shaped object guide port 41, and the rubber tape T fed through the knife device 52 is inserted into the belt-shaped object guide port 41 and guided to the lower surface of the presser foot 37.

  In the sewing machine 30 having such a configuration, the rubber tape T is sewn along the circumferential direction of the opening peripheral portion of the brief 70 as a tubular fabric to be sewn as shown in FIG. In this case, the presser foot 37 is raised and the tape T is supplied to the belt-shaped object guide port 41, and the waist portion 71 is placed on the cylinder bed portion of the sewing machine body 31 so that a part of the brief 70 is positioned below the tape T. Set to 35. 2 and 3, the cylinder bed portion 35 is not shown, but a state in which the brief 70 is set on the cylinder bed portion 35 is shown, and the waist portion 71 of the brief 70 is pressed against the needle plate 36. It is sandwiched between the gold 37. When the feed dog (not shown) that is actuated by a drive source (not shown) is actuated, the brief 70 is fed so as to circulate in the cloth feed direction A. Synchronously with this cloth feeding operation, the needle 39 starts up and down reciprocating operation, and the tape supply roller pair 50 and 51 is operated. The tape T is guided to the lower surface of the presser foot 37 and the waist portion 71 of the brief 70 is operated. Rubber tape T is sewn on top. Along with this, the up and down reciprocation of the needle 39 is started, and the rubber tape T is sewn on the waist portion 71 of the brief 70. At this time, the scalpel device 40 is also in a cut state, and the edge 74 of the sent brief 70 is cut and trimmed. The supply speed of the rubber tape T is set slightly lower than the cloth feed speed, whereby the rubber tape T is sewn to the waist portion 71 of the brief 70 with tension.

  During the sewing of the rubber tape T, the brief 70 is cut by the knife device 40 with a width as small as possible in order to align the fabric ends, and is fed together with the tape T while the fabric end 70E is guided by the fabric guide G. Since the reflection plate 57 of the tape sensor 56 is installed on the upper surface of the front end of the fabric guide G, it detects not the fabric end 70E of the brief 70 but the tape sewing start end Ts. When the sewing of the rubber tape T progresses, the sewing end of the rubber tape T goes around, and the sewing start end Ts passes over the reflection plate 57, the light receiving element 56b does not receive the anti-light emission from the light emitting element 56a. After detecting the non-reception of the reflected light by the light receiving element 56b, the time for the sewing start end Ts of the rubber tape T to reach the belt-shaped object guide port 41 is calculated, and the stop of the cloth feed and the tape supply roller pair 50, 51 are calculated. Is stopped. That is, when the sewing start end portion Ts reaches the belt-shaped object guide port 41, the sewing end portion is formed. Thereafter, the stepping motor 55 is reversed, and the large roller 50 is also rotated in reverse, and a tensile force is applied to the rubber tape T sandwiched between the large roller 50 and the small roller 51. Since the brief 70 is clamped by the needle plate 36 and the presser foot 37 together with the sewn rubber tape T, the rubber tape T is pulled in the anti-feed direction, and the gap between the clamped portion and the tape supply roller pair 50, 51 is between It will be in a stretched state. In this extended state, the knife device 52 is operated, and the rubber tape T is cut. FIG. 4 shows a normal sewing state, and FIG. 5 shows a state where the rubber tape T is cut after the sewing is completed.

  FIG. 6 shows an example of a brief in which the rubber tape T is sewn on the peripheral edge of each opening by the sewing machine 30 described above. In the brief 70 of FIG. 6, the waist portion 71 is in a state immediately after the rubber tape T is sewn and cut, and the left and right crotch portions 72 and 73 are further sewn after the rubber tape T is sewn and the rubber tape T is cut. The state which cut off the cutting | disconnection edge part (cutting allowance part) is shown. Sewing of the rubber tape T at the waist portion 71 is performed while circulating the brief 70 as a cylindrical fabric, and as a result, the sewing is performed along the a direction.

  When the sewing part of the rubber tape T goes around, the rubber tape T is cut by the knife device 52 as described above. At the time of this cutting, as shown in the figure, the cut end Te of the rubber tape T remains at the end of sewing, and then the cut end Te is cut off and discarded. Since this cut end Te is cut in the stretched state as described above, it shrinks after cutting, and its length Ls becomes significantly shorter than the length L in the case of FIG. Therefore, the amount of the rubber tape T to be cut and discarded is reduced, which is effective for resource saving and cost reduction in a sewing factory where a large amount of sewing processing is performed.

  FIG. 7 is a control block diagram of the sewing machine 30. The sewing machine 30 is controlled by a control means (control circuit) 63. The sewing machine rotation motor 64, the stepping motor 55 of the belt-like material supply means 32, the moving knife driving cylinder (not shown) of the knife device 52 for cutting the rubber tape T, and the cloth Control a knife device 40 that cuts and trims the edges. The control means 63 performs these controls in response to the input signals S1 to S4. The signals S1 to S3 are output from the pedal 65 operated by the operator's feet, the signal S1 is a front depression signal, the signal S2 is a neutral signal, and the signal S3 is a rear depression signal. The signal S4 is a cloth presence / absence signal output from the tape sensor 56.

  Next, the control operation of the sewing machine 30 will be described with reference to the flowchart of FIG. 8 and the timing chart of FIG. Time t0 in FIG. 9 shows a state when the previous sewing work is finished and the next sewing work is started. At time t1, the pedal 65 is stepped back (step ST1), and in response to the pedal 65 rear stepping signal S3, the control means 63 places the presser foot 37 in the raised position. At the same time, the fabric 70 to be sewn can be set on the needle plate 36. At this time, the stepping motor 55 rotates forward, the rubber tape T is supplied by a predetermined amount, and the rubber tape T is inserted up to the belt-shaped object guide port 41 (step ST2). When the setting of the fabric 70 and the insertion of the rubber tape T and the attachment to the predetermined position are completed, the rear depression of the pedal 65 is turned off at time t2 to return to the neutral position. In response to the neutral signal S2 from the pedal 65, the control means 63 lowers the presser foot 37 to the lowered position, whereby the presser foot from above with the rubber tape T superimposed on the fabric 70 on the needle plate 36. Pressed with 37.

  Next, at time t3, the operator depresses the pedal 65 forward to the position where the pedal 65 is depressed (step ST3), and sewing work is started. Then, the front depression signal S1 is input to the control means 63, and in response to this, the control means 63 rotates the sewing machine rotation motor 64 to drive the sewing machine and forwardly rotates the stepping motor 55 of the belt-like material supply means 32. (Step ST4). As a result, the rubber tape T is supplied together with the fabric 70, and the rubber tape is sewn to the fabric 70 and sent out. At this time, the knife device (female drop) 40 is in the cutting position, and the edge 74 of the waist portion 71 is cut and trimmed as the fabric 70 is fed out.

  In this way, when the rubber tape T is sewed to the opening peripheral portion (waistline portion) 71 of the fabric 70 and the end of sewing is approaching, the tape sensor 56 is turned on at the time t4 as described above and the tape end is present. It is detected that the signal S4 is input to the control means 63 (step ST5). At this time, the knife device (knife drop) 40 operates (step ST6), and the cutting of the fabric 70 by the knife device 40 stops. Thereafter, when the operator stops the depression of the pedal 65 at time t5, the rotation of the sewing machine rotating motor 64 and the stepping motor 55 is stopped, and the sewing operation of the rubber tape T is completed.

  At time t6, when the operator depresses the pedal 65 (step ST7), the control means 63 reversely rotates the stepping motor 55 in response to the depressing signal S3. Thereby, the rubber tape T is pulled up in the anti-supply direction (step ST8). At the same time, a thread trimming device (not shown) is operated to cut the sewing thread (step ST9). Next, the control means 63 operates the knife device 52 to cut the rubber tape T that has been stretched by lifting, and sets the presser foot 37 to the raised position (step ST10).

  By cutting the rubber tape T, the rubber tape sewing operation for the brief 70 is completed. In this state, the presser foot 37 is in the raised position, so that the brief 70 that has been sewn as shown in FIG. 6 can be taken out. At time t8, when the operator stops stepping on the pedal 65 and returns it to the neutral position (step ST11), in response to the neutral signal S2, the control means 63 disconnects the female device 40 at the cutting position (returning the female drop). (Step ST12), and the presser foot 37 is set to the lowered position to enter a standby state for the next sewing operation. Thereafter, a new fabric is set, and the operations of step ST1 to step ST12 are repeated, and the rubber tape T is sewn on the waist portion 71 of the brief 70. The rubber tape T is sewn on the left and right crotch portions 72 and 73 of the brief 70 in the same manner. In this way, the brief 70 which has been sewn has a significantly shorter cutting end Te of the rubber tape T than the conventional case as shown in FIG. Even in the factory, the amount of the rubber tape T to be discarded is greatly reduced. In addition, since the structural change of the existing sewing machine 30 itself is not required, the operation can be performed only by changing the operation program, which is extremely beneficial for the user.

  In the above-described operation flow, the step ST7 after the pedal end detection (tape sensor ON) in step ST5 is used as a trigger to trigger the tape lifting (tape feed motor reverse rotation) in step ST8 and the subsequent step ST10. However, the present invention is not limited to this. For example, when a needle movement counter is provided, the number of stitches from the start of sewing is counted, and the predetermined number of stitches corresponding to the end of rubber attachment is counted. The control means 63 may be configured to send a reverse rotation signal of the stepping motor 55 and an operation signal of the scalpel device 52. Alternatively, using the tape end detection (tape sensor ON) signal S4 in step ST5 as a trigger, a reverse rotation signal of the stepping motor 55 and an operation signal of the female device 52 are transmitted after a predetermined time has elapsed after the input of this signal S4. Also good. The predetermined time in this case is set by calculating in advance the time until the tape start end Ts shown in FIG. 3 reaches the sewing position after the input of the fabric sensor signal S4.

  In the above-described embodiment, the example in which the band sewing method of the present invention is applied to a flat stitch sewing machine has been described. However, the application target may be an overlock sewing machine.

  In addition, as an example of a method of applying a tensile force in the direction opposite to the supply direction to the belt after completion of sewing, an example in which the supply roller pair is rotated in the reverse direction has been described. A means for applying tension (for example, a pressing means operated by a cylinder or the like) may be arranged, and this means may be operated after sewing is completed.

Further, although the tape sensor 56 detects whether or not the tape sewn on the peripheral edge of the opening of the fabric passes, the tape sensor 56 may detect the overlap state of the rubber tape with the fabric. In this case, in the middle of attaching rubber, only one piece of rubber tape is overlapped on the fabric, and when the waist is circled, the rubber tape is overlapped twice. Therefore, based on the difference between the amount of light received when the rubber tape is one sheet and the amount of light received when the rubber tape is doubled, it can be determined whether or not the rubber attachment has been completed. With such a fabric sensor, it is possible to automatically determine the end of rubber application and to lift and cut the rubber tape without the operator's operation. Needless to say, the tape sensor 56 is not limited to the illustrated photo-interrupter type but may be of other types.
Further, the strip is not limited to the rubber tape, and may be a stretchable cloth tape or the like.

It is a perspective view which shows the whole sewing machine 30 with which the sewing method of the strip | belt-shaped object which is one Embodiment of this invention is applied. It is a side view of the strip-shaped material supply means 32. FIG. 3 is a schematic cross-sectional view seen from a section line III-III in FIG. 2. FIG. 6 is a left side view showing a normal sewing state in the belt-like material supply means 32. It is a side view which shows the state which cut | disconnected the rubber tape T after completion of sewing in the strip | belt-shaped object supply means 32. FIG. It is a top view which shows the brief 70 by which the rubber tape T was made | formed by the method of this invention. 3 is a control block diagram of the sewing machine 30. FIG. 3 is a flowchart of a sewing operation by the sewing machine 30. 6 is a timing chart of the control means 63. It is a perspective view which shows the whole structure of the conventional sewing machine. It is a top view which shows the brief 20 by which the rubber tape T was made | formed by the conventional method using the conventional sewing machine 1. FIG.

Explanation of symbols

30 sewing machine 31 sewing machine main body 32 belt-like article supply means 50 large roller 51 small roller 52 female device 55 stepping motor 70 brief 71 opening peripheral edge T belt-like article Ts sewing end part

Claims (2)

A belt-like material sewing method for sewing a belt-like material to the opening peripheral edge while supplying a stretchable belt-like material to the opening peripheral edge of the cylindrical fabric by a supply roller pair,
When the sewing position reaches the sewing end portion of the belt-like object at the peripheral edge of the opening, the supply of the belt-like object is stopped, and then the sewing is performed with a tensile force in the direction opposite to the supply direction applied to the belt-like object. A method for sewing a belt-like material, comprising cutting the belt-like material in the vicinity of a wearing end portion.   The application of a tensile force to the band after the supply is stopped is performed by rotating the supply roller pair in a direction opposite to the supply direction of the band after the supply roller pair is stopped. A method for sewing a belt-like material according to 1.

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