WO2019064394A1

WO2019064394A1 - Sewing machine, sewing device, and sewing method

Info

Publication number: WO2019064394A1
Application number: PCT/JP2017/035054
Authority: WO
Inventors: 道梅川; 瞳西田
Original assignee: Ykk株式会社
Priority date: 2017-09-27
Filing date: 2017-09-27
Publication date: 2019-04-04
Also published as: TW201915252A; TWI703250B

Abstract

This sewing machine (10) includes: a support plate (19); a presser foot (18); a sewing machine needle (15); lower feed dogs (22) that intermittently feed a material to be sewn (50); guide rollers (31, 38, 39) that rotate in contact with the material to be sewn (50) to guide the material to be sewn (50) between the support plate (19) and the presser foot (18); and a roller drive unit (33) that continuously and rotatingly drives the guide rollers (31, 38, 39). The guide rollers (31, 38, 39) are disposed upstream of at least the location of the sewing machine needle (15) vis-à-vis the direction that the lower feed dogs (22) feed the material to be sewn (50). With this sewing machine (10), overlocking can be automatically and stably performed on the material to be sewn (50) having a curvilinear edge (55b).

Description

Sewing machine, sewing device, and sewing method

The present invention relates to a sewing machine that performs sewing processing on a material to be sewn (sewing object), a sewing device having the sewing machine, and a sewing method using the sewing machine, particularly fly parts having at least a part of arc-shaped curved portions. BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sewing machine, a sewing apparatus (surging apparatus), and a sewing method that perform overlock sewing.

In the sewing machine, as a feeding mechanism for feeding the material to be sewn, in addition to a general feeding mechanism for intermittently feeding the material to be sewn with only the lower feed teeth, for example, the lower feeding while the sewing needle is pierced through the material to be sewn There are known a feeding mechanism for intermittently feeding a material to be sewn with teeth and a sewing needle, and a feeding mechanism for intermittently feeding a material to be sewn between upper and lower feed teeth and upper feed teeth.

Further, in Japanese Patent Application Laid-Open No. 7-116370 (Patent Document 1), a pair of left and right upper feed belts disposed on both sides of a fabric press and left and right disposed opposite to the upper feed belt are used as a sewing machine. A feed mechanism having a pair of lower feed belts is described. The feeding mechanism of this patent document 1 intermittently sandwiches the fabric between the upper and lower pair of upper feeding belts and the pair of lower feeding belts along the dough feeding direction while feeding the whole dough or a part of the dough. It is possible to shift in the direction orthogonal to the direction.

Furthermore, for example, in JP-A-2014-46059 (Patent Document 2), as a feed mechanism of a sewing machine for sewing a tubular sewing material, a first feed tooth (left feed tooth) and A feed mechanism is described having two feed teeth (right feed teeth) and an intermittent feed roller disposed on the side (right side) of the sewing needle and in contact with the fabric from below. According to Patent Document 2, it is possible to adjust the feed amount intermittently fed by the first feed dog (left feed dog) and the feed amount intermittently fed by the second feed tooth (right feed dog) and the intermittent feed roller. Therefore, for example, it is possible to finish the sewing of the tubular portion cleanly.

As described above, the feed mechanism intermittently feeds the workpiece to be sewn with the upper and lower feed teeth, the feed mechanism of Patent Document 1 having the pair of upper feed belts and the pair of lower feed belts, and the first and the second lower portions. In the feed mechanism of Patent Document 2 having two feed teeth and an intermittent feed roller at the upper side, the sewing material is held together with the sewing material in a state in which the sewing material is simultaneously pinched from above and below by the pinching means such as feed teeth, belts, and rollers. It is possible to stably send the sewing material to send.

However, these feeding mechanisms not only require upper and lower clamping means, but also need to synchronize and feed the upper and lower clamping means, operate intermittently with a predetermined amount of feeding, and the like. For this reason, there has been a drawback that the structure and control of the feed mechanism are very complicated compared to a general feed mechanism having only lower feed teeth, for example.

By the way, in the case of cut fabrics such as jeans, trousers, skirts and shirts, the cut side is used in order to prevent the occurrence of a break in the cut edge and to enhance the strength and appearance of the cut side edge. It is known to perform overlock stitching on the edge. Also, performing such edge stitching is sometimes referred to as "surging."

Moreover, there is a fly part (sometimes called simply "fly") used for jeans etc. as one of the component parts of clothes to which surging is performed. In this fly part, generally, an arc-shaped curved portion is provided in a part of the side edge corresponding to the shape of jeans or the like, and a slide fastener or a button is attached.

When surging is performed using a sewing machine on a sewn article such as a fly part or the like, the overedging along the cut side edge of the sewn article (for example, the arc-shaped side edge of the fly part) It takes place continuously. In normal surging, while the sewing machine is operated and edge stitching is performed on the side edge of the workpiece, the position and orientation of the workpiece are manually selected according to the shape of the portion where the edge stitching is to be performed. Adjusted.

On the other hand, for example, in Japanese Patent Application Laid-Open No. 2007-14556 (Patent Document 3) and International Publication No. 2012/032615 (Patent Document 4), a fly part having a predetermined shape is automatically fed by a feed mechanism of a sewing machine. There is disclosed a sewing device (surging device) capable of performing overlock sewing and automatically rotating a fly part by a certain operation during the sewing.

According to the sewing apparatus (surging apparatus) described in these Patent Documents 3 and 4, even if a part of the side edge of the fly part is formed in an arc shape, the fly parts are handed to the predetermined position of the apparatus. By setting the work parts automatically or automatically, the fly parts are automatically rotated without manual operation by means different from the feed mechanism while the fly parts are automatically fed by the feed mechanism of the sewing machine. For this reason, it is necessary to automatically carry out the edge stitching along the side edge of the fly part having an arc-shaped curved portion without manually adjusting the position or the orientation of the workpiece. Can.

As described above, according to the apparatuses of Patent Document 3 and Patent Document 4, surging of the fly parts can be automated and efficiently performed, so that the burden on the operator can be reduced. In addition, since it is possible to mechanically repeat the edging over a plurality of fly parts in the same manner, for example, to stabilize the quality compared to the case where the direction of the sewing material is manually adjusted. Can.

JP 7-116370 A JP, 2014-46059, A JP 2007-14556 A International Publication No. 2012/032615

However, the fly parts are fed using, for example, a general feed mechanism by the lower feed teeth, and as described in Patent Document 3 and Patent Document 4, the fly parts are automatically operated with constant motion during sewing of the fly parts. When surging is automated by rotating it in a rotating manner, the fly parts may be easily caught between the needle plate and the sewing machine foot, which may make it impossible to carry out overedging.

Specifically, since the dough that forms the fry parts is usually not homogeneous, slight differences in properties such as hardness and thickness in the dough may partially occur, and the dough Sometimes it has a unique texture. For this reason, when the fly parts formed of such a fabric are fed by the lower feed teeth, the fly parts can be manually moved only by mechanically moving with constant movement according to the feed of the lower feed teeth. Subtle adjustments can not be made according to the nature of the fabric, as in the case of moving the. As a result, local deviations or wrinkles may occur in the fabric of the fly part due to slight differences in the partial nature of the fabric or the unique texture of the fabric, etc. During sewing with a sewing machine, the tip of the sewing machine foot may get caught. In addition, such a cloth deviation or crease tends to occur at the time of curve surging in which the overturned sewing is performed on the arc-shaped curved portion of the fly part.

Furthermore, for example, when surging is performed on a fly part to which a slide fastener is attached, edge stitching may be performed across the fastener tape of the slide fastener. However, since the fastener tape is usually sewn to the fabric of the fly part in a state of being superimposed on one side of the fabric of the fly part, a step is formed between the fabric of the fly part and the fastener tape. In addition, when a core cord portion that bulges in the tape thickness direction is provided at the tape side edge of the fastener tape, the step between the material of the fly part and the fastener tape becomes even larger.

When surging is performed while automatically feeding a fly part having a step formed between it and the fastener tape in this manner, the step may be caught on the sewing machine foot or the sewing machine foot may not get over the step. As a result, there has been a problem that the edge stitching can not be continued.

In addition, since the fastener tape of the slide fastener needs to fix and hold the fastener element at a predetermined position in a predetermined posture, it is often formed to have higher rigidity than, for example, a cloth of jeans or the like. . On the other hand, in recent years, diversification of clothes has progressed, and for example, jeans of thin and soft cloth and the like have come to be sold.

However, when surging is performed intermittently by the lower feed teeth with respect to the fly parts formed by attaching the slide fastener to the thin and soft cloth as described above, the difference in rigidity between the fastener tape and the cloth The lower feed teeth alone may not be able to properly feed both the fastener tape and the fabric, and as a result, a product with insufficient edge stitching may be produced as a defective product.

For example, as a feed mechanism of a sewing machine, in order to feed fly parts smoothly, as in the above-mentioned Patent Document 1 and Patent Document 2 etc., the fly parts are fed by feed teeth, belts, rollers, etc. It is also conceivable to use a mechanism that intermittently sends signals in a state where they are simultaneously held. However, such a feeding mechanism leads to an increase in the manufacturing cost of the fly parts because the structure and control of the feeding mechanism become very complicated as described above.

The present invention has been made in view of the above-described conventional problems, and its object is to prevent a sewn article such as a fly part having a slide fastener from being caught on a sewing machine foot, thereby lowering the sewn article. A sewing machine capable of performing sewing on a material to be sewn with stitches such as overedging while smoothly feeding by a feed mechanism using feed teeth, a sewing device having the sewing machine, and a sewing method using the sewing machine .

In order to achieve the above object, a sewing machine provided by the present invention comprises a support plate on which a workpiece is placed, a sewing machine foot for pressing the workpiece against the support plate, and the support plate. In a sewing machine provided with a sewing needle moving up and down, and a lower feed tooth for contacting the material to be sewn in contact with the material to be sewn from the lower surface side and intermittently conveying the material to be sewn, the sewing machine contacts the material to be sewn An introduction roller for introducing the material to be sewn between the support plate and the sewing machine foot by rotation, and a roller drive unit for continuously rotating the introduction roller, the introduction roller being the material to be sewn The main feature of the present invention is that it is disposed on the upstream side of at least the position of the sewing needle with respect to the feeding direction of the sewing material by the lower feeding tooth.

In the sewing machine according to the present invention, it is preferable that the introduction roller contact the material to be sewn at a position upstream of a position where the pressing surface of the sewing machine foot contacts the material to be sewn.

In the sewing machine according to the present invention, a drive control unit for controlling the drive of the roller drive unit is disposed, and the drive control unit sets the rotational speed of the introduction roller to the feed speed of the sewing material by the lower feed teeth. It is preferable to control in a corresponding manner, and to control the operation and stop of the roller drive unit corresponding to the sewing position of the workpiece.

Furthermore, the sewing machine of the present invention is provided with a roller moving portion for moving the introduction roller between a contact position where the introduction roller contacts the sewn material and a separation position where the introduction roller separates from the sewn material. It is preferable that the roller moving unit moves and holds the introduction roller to the contact position or the separated position corresponding to a sewing position of the workpiece.

In the sewing machine according to the present invention, the introductory roller has a cylindrical shape whose dimension in the radial direction from the axial center to the outer peripheral edge of the introductory roller is constant, and the radial direction from the axial center to the outer peripheral edge of the introductory roller It is preferable to have a conical shape or a spherical shape, at least a portion of which has a taper that tapers in one of the axial directions.

Further, in the sewing machine according to the present invention, it is preferable that the sewing operation is performed on the material to be sewn.
Furthermore, the sewing machine of the present invention is provided with a cutter portion for cutting the material to be sewn, and the cutter portion is a position at which the introduction roller contacts the material to be sewn in the feeding direction by the lower feed teeth. Preferably, it is disposed between the position of the sewing needle.

Further, according to the present invention, the sewing machine having the above-described configuration and, when sewing the sewn article by the sewing machine, the sewn article is automatically operated in a constant operation along with the feeding of the sewn article by the lower feed teeth. There is provided a sewing device having an automatic rotation unit which can be rotated in a rotating manner.

Next, according to the sewing method provided by the present invention, a support plate on which an object to be sewn is placed, a sewing machine foot for pressing the object to be sewn toward the support plate, and a sewing machine moving up and down with respect to the support plate The sewing method according to any one of the first to seventh aspects, wherein the sewing object is sewn using a sewing machine having a needle and a lower feed tooth that intermittently conveys the sewing material by contacting the sewing material from the lower surface side. Using the sewing machine further comprising: an introduction roller for introducing the support plate between the support plate and the sewing machine foot; and a roller drive unit for continuously rotating the introduction roller; and When sewing a part, the introduction roller is brought into contact with the sewn material, and the introduction roller is continuously rotated by the roller drive portion, whereby the sewn material is made into the support plate and the support plate. It is an most important feature that comprises introducing between the serial sewing machine foot.

It is preferable that such a sewing method of the present invention includes synchronizing a feed speed of the sewn product by the lower feed teeth and an introduction speed of the sewn product by the introduction roller.

In the sewing method according to the present invention, a fly part to which a slide fastener is attached is used as the material to be sewn, an edge sewing is performed on the fly part using the sewing machine, and the fly part And the feed roller is brought into contact with the fly part and the feed roller is continuously rotated by the roller drive when the curb stitching is performed on the at least arc-shaped curved portion formed in Is preferred.

Further, according to the sewing method of the present invention, when performing the edge oversewing on the linear side edge continuously formed from the curved portion on the fly part, the drive of the introduction roller by the roller driving unit It is preferable to include stopping the feed roller or separating the introduction roller from the fly part.

The sewing machine according to the present invention comprises a support plate such as a needle plate, a sewing machine foot for holding an object to be sewn (an object to be sewn), a sewing needle, lower feed teeth for intermittently conveying the object to be sewn, An introduction roller for introducing a sewing material between a support plate and a sewing machine foot by rotating in a state of being in contact with an object, and a roller driving unit for continuously rotating the introduction roller. In addition, the introduction roller is disposed upstream of the position of the sewing needle with respect to the feeding direction by the lower feed tooth of the workpiece.

According to such a sewing machine of the present invention, even if local deviation or wrinkles occur in the material of the material to be sewn as the material to be sewn such as a fly part is fed by the lower feed teeth, the material may A continuously rotating introduction roller contacts the part and corrects the deviation and wrinkles before the part of the groin is introduced between the support plate (needle plate) and the machine foot, and the fabric is normal (normal) It can be returned to the state of Furthermore, when the rotating introduction roller comes in contact with the workpiece, the contacted portion can be continuously and forcibly fed between the support plate and the sewing machine foot, so the workpiece is sewn during sewing. It can be made hard to produce a hook on a sewing machine foot or a support plate.

Also, for example, when sewing is performed on a fly part having a slide fastener attached to the fabric, a step is formed between the fabric of the fly part and the fastener tape of the slide fastener (especially the core cord portion of the fastener tape) However, not only the fabric and the fastener tape but also the step between them can be forcibly fed between the support plate and the sewing machine foot by the continuously rotating introduction roller. As a result, since the sewing machine foot can smoothly get over the steps of the fly parts, it is possible to prevent the steps from being caught on the sewing machine foot or the support plate. Furthermore, since the continuously rotating introduction roller can assist the feeding of the fly part by the lower feed teeth by introducing the fabric and the fastener tape between the support plate and the sewing machine foot, for example, to the fabric and the fastener tape Even if there is a difference in rigidity, sewing can be performed while appropriately feeding both the fabric and the fastener tape.

Therefore, according to the sewing machine of the present invention, it is possible to smoothly feed a sewn article such as a fly part with a slide fastener with the lower feed tooth without adopting a complicated structure or control in the feeding mechanism, Sewing can be carried out smoothly and stably by stitching such as overlock stitching. In the sewing machine according to the present invention, it is possible to perform sewing on a material to be sewn other than fly parts, and it is also possible to sew on a material to be sewn using stitches other than edge stitching. .

In such a sewing machine of the present invention, the introduction roller is located on the upstream side of the position where the pressing surface of the sewing machine foot contacts the material to be sewn, preferably the upstream edge of the sewing machine foot, in the feeding direction by the lower feed teeth. It is arranged to be in contact with the workpiece at the position. Thus, the workpiece can be stably fed between the support plate and the foot of the sewing machine by bringing the introduction roller into contact with the material to be sewn and rotating the introduction roller by the roller drive unit.

Further, the sewing machine of the present invention is provided with a drive control unit that controls the drive of the roller drive unit. The drive control unit synchronizes the introduction speed of the sewn material by the introduction roller with the feed speed of the sewn material by the lower feed tooth in accordance with the rotational speed of the introduction roller corresponding to the feed speed of the sewn material by the lower feed tooth Can be controlled. Thereby, the feed of the sewing material by the lower feed teeth can be stably and effectively assisted by the introduction roller. In addition, the material to be sewn may be excessively fed under the sewing machine foot by the introduction roller, or the material to be sewn may be caught by the introduction roller due to insufficient rotation of the introduction roller, or the material to be sewn may be locally stretched. Preventing sewing can be done smoothly.

Furthermore, the drive control unit of the present invention can control the operation and stop of the roller drive unit corresponding to the sewing location of the workpiece. Thereby, for example, in the case of performing edge oversewing on a sewn material having a linear side edge and an arc-like side edge (curved portion), the edge oversewing is performed on the arc-like side edge The feed roller can be rotated to positively feed the workpiece under the sewing machine foot.

On the other hand, when performing edge stitching on a linear side edge portion (straight portion), the operation of the roller drive portion can be stopped to bring the introduction roller into a free state. Thereby, it is possible to temporarily interrupt the feeding operation of the sewing material by the introduction roller and to perform sewing on the linear side edge only by the feeding of the sewing material by the lower feed teeth, and as a result, the sewing material Sewing of the sewing product can be performed efficiently, and when sewing is performed at a relatively high speed, it is possible to suppress the occurrence of an adverse effect due to the feeding of the introduction roller.

Furthermore, the sewing machine according to the present invention is provided with a roller moving unit that moves the introduction roller to a contact position where the introduction roller contacts the sewn article and a separated position where the introduction roller separates from the sewn article. The roller moving unit can move and hold the introduction roller to the contact position or the separated position corresponding to the sewing position of the workpiece. By this, even when the introduction roller is continuously rotated by the roller drive unit, the introduction roller is held at the separated position, for example, when edge-stitching is performed on a linear side edge portion (straight portion). Thus, the feeding operation of the sewing material by the introduction roller can be temporarily interrupted. As a result, sewing of the material to be sewn can be performed efficiently, and when sewing is performed at a relatively high speed, it is possible to suppress the occurrence of an adverse effect due to the feeding of the introduction roller.

The introduction roller of the present invention has a cylindrical shape in which the dimension in the radial direction from the axial center of the introduction roller to the outer peripheral edge is a constant size. As a result, the rotating introduction roller can be stably brought into contact with the material to be sewn, and the material to be sewn can be smoothly fed under the sewing machine foot. Further, the introduction roller of the present invention has a conical shape or a spherical shape provided with at least a tapered portion in which the radial dimension from the axial center to the outer peripheral edge of the introduction roller gradually decreases toward one of the axial directions. You may have. For example, in the case of performing an overturn sewing on an arc-shaped side edge portion provided on a workpiece, sewing is performed while rotating the workpiece. In this case, when the introduction roller is formed in a conical shape or a spherical shape, the introduction roller can be made less likely to be caught by the sewn article when the sewn article rotates, so the rotating introduction roller is sewn The workpiece can be smoothly rotated on the support plate while being in contact with the support plate.

The above-mentioned sewing machine of the present invention is particularly suitably used when performing over stitch on a workpiece.
Furthermore, the sewing machine of the present invention is provided with a cutter unit for cutting the material to be sewn. The cutter portion is disposed between the position at which the introduction roller contacts the material to be sewn and the position of the sewing needle in the feeding direction by the lower feed tooth. With such a sewing machine, by feeding the material to be sewn under the introduction roller, the material to be sewn is cut into a predetermined shape by the cutter portion, and at the side edge portion formed by cutting the cutter portion. Edge stitching can be performed. For this reason, it is possible to efficiently carry out overedging at a predetermined position of the workpiece.

According to the present invention, the sewing machine having the above-described configuration and the sewing material to be sewn on the same plane as the upper surface of the support plate along with the feeding of the sewing material by the lower feed teeth when sewing the sewing material by the sewing machine There is provided a sewing device having an automatic rotation unit which can be automatically rotated by the operation of (1). Here, "automatically" means that the machine performs work automatically, not manually.

According to such a sewing apparatus of the present invention, by setting a sewn article such as a fly part at a predetermined position, for example, the worker manually adjusts the position or the direction of the sewn article without manually adjusting the position or the direction Also, sewing can be performed automatically and stably by stitching such as edge stitching on the material to be sewn without the material being sewn being caught on the foot of the sewing machine. As a result, it is possible to further reduce the manufacturing cost and further stabilize the quality of the product.

Next, in the sewing method provided by the present invention, the support plate, the sewing machine foot for holding the material to be sewn, the sewing needle, the lower feed teeth for intermittently conveying the material to be sewn, and the material to be sewn are contacted. The sewing material is sewn using the sewing machine provided with an introduction roller for introducing the material to be sewn between the support plate and the sewing machine foot by rotating in a fixed state, and a roller drive unit for rotating the introduction roller continuously. I do. When sewing at least a part of the material to be sewn, the material to be sewn is supported by the support plate and the sewing machine foot by bringing the introduction roller into contact with the material to be sewn and rotating the introduction roller continuously by the roller drive unit. To introduce between.

Thereby, even if local deviation or wrinkles occur in the fabric of the material to be sewn, for example, the continuously rotating introduction roller can contact the portion to correct the deviation or wrinkle and support the contacted portion Since the sheet can be continuously and forcibly fed between the plate and the sewing machine foot, it is possible to prevent the sewing material from being caught on the sewing machine foot or the support plate during sewing.

Also, for example, when sewing is performed on a fly part having a slide fastener attached to the fabric, a step formed between the fabric of the fly part and the fastener tape of the slide fastener is caught on the sewing machine foot or the support plate Can be difficult to occur. Furthermore, since the continuously rotating introduction roller can assist the feeding of the fly parts by the lower feed teeth by introducing the fabric and the fastener tape between the support plate and the sewing machine foot, both the fabric and the fastener tape Sewing can be performed while feeding appropriately.

Therefore, according to the sewing method of the present invention, it is possible to smoothly feed the material to be sewn such as a fly part with a slide fastener with the lower feed tooth without adopting a complicated structure or control for the feed mechanism. Sewing can be carried out smoothly and stably by stitching such as overedging on objects.

In such a sewing method of the present invention, the feeding speed of the sewing material by the lower feeding tooth and the introduction speed of the sewing material by the introduction roller are synchronized. Thereby, the feed of the sewing material by the lower feed teeth can be stably and effectively assisted by the introduction roller. In addition, the material to be sewn may be excessively fed under the sewing machine foot by the introduction roller, or the material to be sewn may be caught by the introduction roller due to insufficient rotation of the introduction roller, or the material to be sewn may be locally stretched. Preventing sewing can be done smoothly.

The sewing method of the present invention is particularly suitably used when performing fly-over stitching on a fly part using a fly part to which a slide fastener is attached as a material to be sewn. Furthermore, when an arc-shaped curved portion is formed at the side edge portion of the fly part, if edge stitch is performed by the conventional sewing method, when the curved portion is fed only by the lower feed teeth, The fly parts are easily caught on the foot of the sewing machine, but in the sewing method of the present invention, when the curving of the fly parts is carried out in an end-over, the introduction roller is brought into contact with the fly parts and By continuously rotating the introduction roller, it is possible to make it difficult to catch the fly part on the sewing machine foot, and therefore, it is possible to smoothly and stably perform the edge stitching on the side edge portion of the fly part.

Further, according to the sewing method of the present invention, when performing the edge oversewing on the linear side edge continuously formed from the curved portion on the fly part, the driving of the introduction roller by the roller driving unit is stopped, or The introduction roller is separated from the fly part. As a result, the feeding operation of the material to be sewn by the introduction roller can be temporarily interrupted when edge-stitching is performed on a linear side edge (straight portion) provided on the material to be sewn. Therefore, sewing of the material to be sewn can be performed efficiently. In addition, when sewing is performed at a relatively high speed, it is possible to suppress the occurrence of adverse effects due to the feeding of the introduction roller.

BRIEF DESCRIPTION OF THE DRAWINGS It is a front view which shows the sewing apparatus which has a sewing machine and an automatic conveyance part which concern on the Example of this invention. It is a perspective view showing a sewing machine. It is a side view of a sewing machine. It is an expanded sectional view which expands and shows the principal part of a sewing machine. It is sectional drawing which looked at the principal part of the sewing machine from the pillar part side. It is a schematic diagram which shows typically the state before setting a fly part to the predetermined position of a sewing apparatus. It is a schematic diagram which shows typically the state which set the fly parts to the predetermined position of the sewing apparatus, and pressed with the sewing machine foot. It is a schematic diagram which shows typically the state which performs edging over the 1st straight part of fly parts. It is a schematic diagram which shows typically the state which performs edge oversewing to the curve part of fly parts. It is a schematic diagram which shows typically the state which performs edging over the 2nd straight part of fly parts. It is an expansion perspective view expanding and showing an important section of a sewing machine concerning a modification of the present invention. It is an enlarged perspective view which expands and shows the principal part of the sewing machine concerning another modification of the present invention.

Hereinafter, embodiments of the present invention will be described in detail by way of examples with reference to the drawings. The present invention is not limited to the embodiments described below, and various modifications are possible as long as the configuration is substantially the same as the present invention and the same function and effect can be exhibited. It is.

FIG. 1 is a front view showing a sewing device according to the present embodiment. 2 and 3 are a perspective view and a side view showing the sewing machine of the sewing device. 4 and 5 are cross-sectional views of the structure around the sewing needle of the sewing machine as viewed from the left side and the right side.

In the following description, the front-rear direction is the direction in which the sewing material is fed by the lower feed teeth of the sewing machine, and the direction in which the sewing material is fed (rearward direction in FIG. 1) is the rear direction. Let the direction on the front side of FIG. 1 be the front). The vertical direction is the direction orthogonal to the flat mounting surface of the support plate, and the direction in which the sewing needle is disposed with respect to the support plate (upper direction in FIG. 1) is the upper direction. On the other hand, the direction (lower direction in FIG. 1) of the side on which the lower feed dog is disposed is the lower direction. The left-right direction is a direction perpendicular to the feed direction of the sewing material and parallel to the mounting surface of the support plate. In the case of the present embodiment, as shown in FIG. 1, the left side and the right side when the sewing machine is viewed from the front side are respectively left direction and right direction.

The sewing apparatus 1 (also referred to as a surging apparatus) according to the present embodiment, as shown in FIGS. 1 and 2, is a sewing machine (lock sewing machine) 10 that performs edge stitching on a material to be sewn (sewing target); While pressing from above the table (working table) 3 connected to 10 and the sewing material placed at a predetermined position on the table 3, moving and rotating the sewing material according to a preset movement And an automatic conveyance unit 5 capable of

In this case, the upper surface of the table 3 is formed flat. The table 3 is connected to the bed portion 11 of the sewing machine 10 and is supported by a supporting portion (not shown) so that the upper surface of the table 3 forms the same plane as the mounting surface of the support plate (needle plate) 19 described later of the sewing machine 10. It is supported. In the present invention, the table (workbench) of the sewing apparatus may be formed integrally with the support plate of the sewing machine (in other words, part of the table (workbench) of the sewing apparatus serves as the support plate of the sewing machine) May be used).

The automatic conveyance unit 5 of this embodiment includes an automatic arm unit (robot arm) 5a shown in FIG. 1, an arm drive mechanism (not shown) for moving the automatic arm unit 5a, and a control unit (computer) for controlling the arm drive mechanism. And. In addition, as described later, the automatic conveyance unit 5 of this embodiment presses the workpiece (fly parts 50) on the table 3 from above with the automatic arm unit 5a and starts the sewing start position by a certain operation from a predetermined position The operation to move up to, the operation to move the workpiece according to the feed speed of the sewing machine 10 while pressing the workpiece with the automatic arm 5a after sewing by the sewing machine 10, and the workpiece to be sewn by the automatic arm 5a It is set in advance to perform various operations such as an operation of rotating at a predetermined timing and an operation of transporting the sewing material to the recovery unit (not shown) by the automatic arm unit 5a after sewing by the sewing machine 10 (program Has been That is, the automatic conveyance unit 5 of the present embodiment performs the constant movement of the material to be sewn with the constant timing and the automatic movement unit capable of automatically moving the material to be sewn (fly part 50) along the constant path. And an automatic rotating unit capable of rotating automatically.

The automatic conveyance unit 5 of the present invention only needs to be formed so as to automatically perform at least an operation of rotating the sewing material being sewn at a predetermined timing, and the specific structure of the automatic conveyance unit 5 is It is not particularly limited. For example, it is possible to use the mechanism of a part of the sewing device described in Patent Document 3 or the mechanism of a part of the surging device described in Patent Document 4 as the automatic conveyance unit 5 of the present invention. is there.

The sewing machine 10 according to this embodiment includes a bed 11 serving as a base, a pillar 12 standing upward from the right side end of the bed 11, and a left end from the upper end of the pillar 12 And an arm portion 13 extending substantially in parallel with the bed portion 11.

A needle bar 16 to which two sewing needles 15 are attached and a presser bar 17 are disposed so as to protrude rearward and obliquely downward at the tip (left end) of the arm 13 in the sewing machine 10 . In this case, the needle bar 16 is vertically movably supported by a needle bar driving mechanism (not shown) along the projecting direction (rearward and downward direction) of the needle bar 16. The sewing machine needle 15, the needle bar 16, and the needle bar drive mechanism of the present embodiment are formed substantially in the same manner as a conventional general sewing machine that performs overedging.

A sewing machine foot 18 is attached to the presser bar 17. The sewing machine foot 18 is attached to be able to be held at a pressing position for pressing the material to be sewn (the fly part 50) and at a rising position (the separated position) to rise and separate from the material to be sewn. The sewing machine foot 18 is disposed on the foot main body 18a for holding the material to be sewn and on the rear side of the foot main body 18a (upstream in the feed direction of the material to be sewn). And an upwardly curved foot tip 18b for ease of introduction below. Therefore, the pressing surface for pressing the sewing material by the sewing machine foot 18 is basically formed by the lower surface of the foot main body 18a. The foot tip end portion 18 b is provided with a notch-like accommodation recess in which a part of an introduction roller 31 described later is inserted and accommodated.

At the left end of the bed 11 of the sewing machine 10, a support plate (needle plate) 19 on which the workpiece is placed and a table fixing portion 21 connecting and fixing the table 3 are arranged. The table fixing portion 21 is provided at a low level from the upper surface of the support plate 19 in order to arrange the upper surface (mounting surface) of the support plate 19 and the upper surface of the table 3 on a single plane.

In the left side end of the bed 11, lower feed teeth 22, a looper (not shown), and a cutter 23 (see FIG. 5) for cutting the material to be sewn just before sewing are arranged.
The lower feed teeth 22 are arranged to move in a constant behavior in the front-rear direction and the up-down direction by a feed tooth drive mechanism (not shown). When the lower feed teeth 22 move and come into contact with the workpiece from the lower surface side, the workpiece can be intermittently sent forward (downstream). Here, to convey the material to be sewn intermittently, the lower feed teeth 22 contact the material to be sewn to move the material to be sewn by a fixed distance, and the movement of the material to be sewn by the lower feed teeth 22 Do not do stop states alternately to repeat.

The looper (not shown) can form a seam of a sewn stitch on the workpiece in cooperation with the two sewing needles 15 by moving in a predetermined behavior by the looper drive mechanism.

The cutter unit 23 of the present embodiment has the position of the sewing needle 15 and the position where the introduction roller 31 described later contacts the material to be sewn (in other words, the roller main body 31a described later) And the lower end position of Moreover, the cutter part 23 has the fixed blade (lower blade) 23a and the movable blade (upper blade) 23b, as shown in FIG.

The fixed blade 23 a of the cutter unit 23 is disposed such that the cutting blade is at the same height position (vertical position) as the upper surface of the support plate 19. The movable blade 23 b is vertically movable by a movable blade drive mechanism (not shown) in a state where a part of the movable blade 23 b protrudes upward from the upper surface of the support plate 19. Furthermore, the cutting blade of the movable blade 23b is provided to be inclined obliquely upward toward the rear.

In the cutter unit 23, the movable blade 23b moves up and down while contacting the side surface of the fixed blade 23a, whereby the workpiece to be fed forward by the cutting blade of the movable blade 23b and the cutting blade of the fixed blade 23a is sequentially It can be cut off.
The sewing machine 10 according to the present embodiment is provided with one or more drive sources (such as a sewing machine motor) for driving the various drive mechanisms described above, and a control unit for controlling the drive sources.

Furthermore, in the sewing machine 10 of the present embodiment, the introduction roller 31 for introducing the material to be sewn between the support plate 19 and the sewing machine foot 18 and the roller holding portion 32 for rotatably holding the introduction roller 31 at a predetermined position. A roller drive unit 33 that rotationally drives the introduction roller 31 and a drive control unit (not shown) that controls the drive of the roller drive unit 33 are disposed. In this case, the roller holding portion 32 is fixed to the support plate 19.

The introduction roller 31 has a cylindrical roller body 31 a and a rotation shaft portion 31 b extending rightward from the roller body 31 a, and the rotation shaft portion 31 b of the introduction roller 31 is pivotally supported by the roller holding portion 32. It is done. A first pulley 34 around which the belt 36 is wound is disposed at the right end of the rotation shaft 31b of the introduction roller 31.

The roller body 31a of the introduction roller 31 is disposed outside the roller core portion 31c made of metal and having a circular shape, as shown in FIG. It has a doughnut-shaped outer peripheral edge portion 31d formed of a synthetic resin, and the synthetic resin outer peripheral edge portion 31d is in direct contact with the upper surface of the sewing material. In this case, the introduction roller 31 is held by the roller holding portion 32 at a position where the roller body 31a appropriately contacts the material to be sewn in the height direction (vertical direction), and the roller body 31a and the support plate 19 An appropriate gap through which the sewing material passes is formed therebetween.

Further, the introduction roller 31 is further positioned such that the downstream end (front end) of the roller main body 31 a is positioned upstream (rearward) than the sewing needle 15 in the feed direction (front-rear direction) of the sewing material. Are disposed on the upstream side (rear side) of the movable blade 23 b of the cutter unit 23.

Furthermore, in the present embodiment, the introduction roller 31 is disposed in a state where a part of the roller main body 31a is inserted into the accommodation recess of the sewing machine foot 18, and the downstream end (front end) of the roller main body 31a is the sewing machine The foot 18 is disposed downstream (forward) of the upstream end (rear end) of the foot 18.

In this case, the outer peripheral surface disposed at the lower end of the roller main body 31a is disposed on the upstream side of the pressing surface of the sewing machine foot 18 (that is, the lower surface of the foot main body 18a) in the feed direction (longitudinal direction) Thus, the roller body 31a contacts the sewing material at a timing earlier than the sewing machine foot 18 at a position upstream of the contact position where the pressing surface of the sewing machine foot 18 contacts the sewing material It is possible.

The roller drive unit 33 of the present embodiment is fixed to the pillar 12 of the sewing machine 10 via a bracket or the like. A second pulley 35 is disposed on the drive shaft of the roller drive unit 33. The second pulley 35 and the first pulley 34 provided on the rotation shaft portion 31 b of the introduction roller 31 are connected via the belt 36, whereby the power (rotation) of the roller drive unit 33 is the introduction roller 31. Transmitted to By providing the roller drive unit 33 in this manner, the introduction roller 31 can be rotationally driven with a simple structure, and control of the rotation of the introduction roller 31 (drive control of the roller drive unit 33) is easy and stable. Can be done.

In the present invention, for example, the rotary shaft portion 31b of the introduction roller 31 is connected to a drive source (for example, a sewing machine motor) of the sewing machine 10 via an electromagnetic clutch or the like without providing the above-described roller driving unit 33. It is also possible to transmit the power of the drive source (rotation of the sewing machine motor) to the introduction roller 31 to drive and rotate the introduction roller 31. Further, in this case, it is possible to switch between drive rotation (ON) and stop (OFF) of the introduction roller 31 by control of the electromagnetic clutch.

The drive control unit of the roller drive unit 33 is formed to be able to control the rotational speed of the introduction roller 31 by controlling the drive of the roller drive unit 33. Thus, the drive control unit causes the introduction roller 31 to introduce (feed) the sewn material under the sewing machine foot 18 so that the introduction speed is synchronized with the feed speed of the sewn material by the lower feed tooth 22. The rotational speed of 31 can be appropriately controlled in accordance with the feed speed of the lower feed teeth 22. Here, the introduction speed of the material to be sewn by the introduction roller 31 refers to the speed of the material to be sewn introduced between the sewing machine foot 18 and the support plate 19 by the introduction roller 31 coming into contact with the material to be sewn and rotating. Say.

Further, the drive control unit of the roller drive unit 33 is formed so as to be able to control operation (ON) and stop (OFF) of the roller drive unit 33. Thereby, by stopping the roller drive part 33, it is possible to hold the introduction roller 31 so as to freely rotate. Therefore, for example, when the roller drive unit 33 is stopped in a state where the introduction roller 31 is in contact with the sewn material while the sewn material is being fed by the lower feed teeth 22, the introduction roller 31 is Instead of the drive by the roller drive unit 33, it is possible to make the driven rotation by the friction generated with the workpiece.

Next, using the sewing apparatus 1 of the above-described embodiment, while cutting the fly part 50 to which the slide fastener 51 is attached, the side edge portion of the cut fly part 50 is sewn to be sewn over A method of automatically performing the process (surging process) will be described.

First, as shown in FIG. 6, the side edge portion of the short side of the rectangular fly part 50 is the lower feed tooth 22 at a predetermined position on the table 3, as shown in FIG. 6. Set in the direction along the feed direction by.

At this time, the slide fasteners 51 of the fly parts 50 are engaged with the left and right element rows, and the fly parts 50 are placed on the table 3 in a straight state where the fabric 53 of the fly parts 50 is not bent. The setting of the fly parts 50 may be performed manually by a worker, or the supply device of the fly parts 50 (not shown) may mechanically and automatically perform the operation without manual operation. At this time, the sewing machine foot 18 of the sewing machine 10 is held at the raised position where it is separated from the workpiece.

After the fly parts 50 are set at predetermined positions on the table 3, the automatic arm unit 5a of the automatic conveyance unit 5 shown in FIG. 1 moves above the fly parts 50 and is shown by a two-dot chain line in FIG. Thus, the fly part 50 is held down from above. Subsequently, the automatic arm unit 5a moves while pressing the fly part 50 from above, and the sewing start portion in the fly part 50 where the overedging is started is passed between the support plate 19 and the introduction roller 31. The support plate 19 is disposed at a position (sewing start position) where the support plate 19 and the upstream portion of the pressing surface of the sewing machine foot 18 can be nipped.

At the same time, the direction (orientation) of the fly part 50 is made orthogonal to the feeding direction by the lower feed teeth 22 by the automatic arm 5 a of the automatic conveyance unit 5 (the fly part 50 So that the side edge on the short side of the lower feed tooth 22 is parallel to the feed direction of the lower feed tooth 22). The above-described operation of the automatic arm unit 5 a of the automatic conveyance unit 5 is controlled by a control unit (not shown) of the automatic conveyance unit 5.

After the fly parts 50 are moved to and held at the sewing start position, the sewing machine foot 18 of the sewing machine 10 is automatically lowered and held at the pressing position. Thereby, the sewing machine foot 18 presses the sewing start portion of the fly part 50 toward the support plate 19 from the upper surface side, and the sewing start portion is held between the support plate 19 and the sewing machine foot 18.

At this time, for example, one fastener tape 52 disposed on the side closer to the sewing start portion of the slide fastener 51 is temporarily bent and positioned on the upper side or the lateral side of the sewing machine foot 18. It is possible to perform surging without overedging (see FIGS. 9 and 10). In the present invention, it is possible to optionally select whether or not to perform the overlock sewing on the fastener tape 52 of the slide fastener 51 according to the application of the produced fly part 50 and the like.

After the sewing start portion of the fly part 50 is pressed by the sewing machine foot 18, the introduction roller 31, the lower feed tooth 22, the cutter portion 23, the sewing needle 15 (needle bar 16), the looper, etc. Run and drive. Thereby, the intermittent feeding of the fly parts 50 by the lower feed teeth 22 is started, and the side edges of the short side of the fly parts 50 are moved by moving the sewing needle 15 or the looper according to the feeds by the lower feed teeth 22. Curb stitching is started on the portion (first straight portion 55a) (see FIG. 7).

At the same time, when the introduction roller 31 contacts and rotates the fly part 50, the fly part 50 is introduced between the sewing machine foot 18 and the support plate 19 by the rotational frictional force of the introduction roller 31. As a result, the fly parts 50 are forcibly fed between the sewing machine foot 18 and the support plate 19, and the feeding of the fly parts 50 by the lower feed teeth 22 is assisted. Therefore, it is possible to suppress the occurrence of a problem such as the fly parts 50 being caught between the sewing machine foot 18 and the support plate 19.

In this case, in the introduction roller 31 of the present embodiment, since the roller main body 31a is formed in a cylindrical shape, the outer peripheral surface of the rotating roller main body 31a can be firmly brought into contact with the fly parts 50. The feeding operation of the fly parts 50 can be stably performed. Particularly, in the present embodiment, when edge-stitching is performed on a linear side edge such as the first straight portion 55a of the fly part 50 or the second straight portion 55c described later, the feeding by the introduction roller 31 is stabilized. It can be carried out.

When feeding the fly parts 50 by the introduction roller 31 as described above, the rotational speed of the introduction roller 31 is the introduction speed at which the introduction roller 31 introduces the fly parts 50 between the sewing machine foot 18 and the support plate 19 (fly Control according to the feed speed of the fly parts 50 by the lower feed teeth 22 by the drive control unit of the roller drive unit 33 so that the feed speed of the parts 50 is synchronized with the feed speed of the fly parts 50 by the lower feed teeth 22 Be done.

Here, when the feed speed by the intermittent feed of the fly parts 50 by the lower feed teeth 22 and the continuous introduction speed of the introduction roller 31 are synchronized, the two speeds per unit time (predetermined time) are It says to be the same size. As a result, the fly parts 50 may be caught on the introduction roller 31 or the like due to the fly parts 50 being excessively fed under the sewing machine foot 18 by the introduction roller 31 or insufficient rotation of the introduction roller 31 (insufficient feed of the fly parts 50). It is possible to prevent the part 50 from being stretched locally, and sewing can be performed smoothly.

In the step of over-stitching (surging) performed on one fly part 50 in the present embodiment, a linear side edge (first straight part 55 a) on the short side from the sewing start part of the fly part 50 is formed. While cutting the side edge portion of the fly part 50 into a circular arc shape by the cutter portion 23 after the first sewing step and the first sewing step, in which the linear stitching is performed linearly, the side edge portion formed in the circular arc shape The second sewing step (curve surging step) of performing the over stitch along the curving portion 55b (curve portion 55b), and the side edge portion of the fly part 50 after the second sewing step is linearly cut by the cutter portion 23 And a third sewing step of performing edge stitching along the side edge portion (second straight portion 55c) formed into a shape.

In the present embodiment, in the first sewing step, when performing the edge oversewing on the first straight portion 55a which is a part of the side edge portion of the short side of the fly part 50, the fly parts by the cutter portion 23 50 cutting processes are not performed. However, in the present invention, in the first sewing step, while cutting the fly part 50 linearly or in a curved shape from the sewing start portion of the fly part 50 by the cutter portion 23, along the side edge formed by the cutting. It is also possible to carry out overlock stitching.

In the above-described first sewing process of the present embodiment, the first straight portion 55 a of the fly part 50 is sewn over while the fly part 50 is fed under the sewing machine foot 18 by the introduction roller 31. By feeding the fly parts 50 by the introduction roller 31 in this manner, for example, as the fly parts 50 are fed by the lower feed teeth 22, local deviation or wrinkles occur in the fabric 53 of the fly parts 50. Even before the part of the shift or crease is introduced between the support plate 19 and the sewing machine foot 18, the continuously rotating introduction roller 31 contacts the portion to correct the shift or crease, The dough 53 can be returned to the normal (normal) state. Furthermore, when the rotating introduction roller 31 contacts the fly part 50, the contacted portion can be continuously and forcibly fed so as to slide in between the support plate 19 and the sewing machine foot 18. Therefore, it is possible to make it difficult to cause a defect such as the fly part 50 being caught on the sewing machine foot 18 or the support plate 19 during sewing.

Furthermore, in the first sewing process, after performing the oversewing on the fabric 53 (the fabric 53 on the left side) of the fly part 50 to which the one fastener tape 52 (the left fastener tape 52) of the slide fastener 51 is attached Edged stitching is continuously performed on the other fastener tape 52 (right fastener tape 52) of the slide fastener 51 and the fabric 53 (right fabric 53) of the fly part 50 to which the other fastener tape 52 is attached. Do.

In this case, since the fastener tape 52 on the right side is superimposed on the fabric 53 on the right side, the step corresponding to the thickness of the fastener tape 52 (in particular, the thickness of the core cord portion provided on the tape side edge of the fastener tape 52) A step equivalent to the height is formed on the fly part 50.

In the first sewing process of the present embodiment, even when the fly parts 50 are formed with the above-described step when performing edge oversewing from the fabric 53 on the left to the fastener tape 52 on the right and the fabric 53 on the right. By forcibly feeding the fly parts 50 under the sewing machine foot 18 by the introduction roller 31, the steps of the fly parts 50 are prevented from being caught on the sewing machine foot 18, and the sewing machine foot 18 smooths the steps of the fly parts 50. You can get over it.

Furthermore, when performing overlock sewing on the right-side fastener tape 52 and the right-side fabric 53 that are superimposed, for example, the flexibility of the fabric 53 is high and the difference in rigidity between the fabric 53 and the fastener tape 52 Even when the above occurs, the feeding of the fly parts 50 by the introduction roller 31 makes it possible to stably and smoothly carry out the edge stitching while appropriately feeding both the fabric 53 and the fastener tape 52.

In the first sewing process of the present embodiment, the driving of the introduction roller 31 by the roller drive unit 33 is stopped to interrupt the feeding operation by the introduction roller 31, and the introduction roller 31 is in contact with the fly part 50. Edged stitching may be performed while being driven to rotate by feeding the fly parts 50.

After the first sewing process described above is performed at a predetermined distance on the side edge of the short side of the rectangular fly part 50, the second sewing process is continuously performed. In the second sewing step, while the automatic arm unit 5a of the automatic conveyance unit 5 presses the fly part 50 from above, as shown in FIGS. 7 to 9, the fly part 50 is placed on the upper surface of the support plate 19 and the table 3 The cutter part 23 of the sewing machine 10 moves the fly parts 50 from the side edge of the short side of the rectangular fly part 50 to the side edge of the long side by rotating at a predetermined rotation speed on the upper surface of the Cut so that it curves like an arc. At the same time, an edged stitch (curve surging) is performed on the arc-shaped side edge (curved portion 55b) formed by the cutting.

Also in the second sewing process, the feeding operation of the fly parts 50 by the introduction roller 31 is performed continuously from the first sewing process, but in the second sewing process, the feeding speed of the fly parts 50 by the lower feed teeth 22 is the first sewing While decelerating from the process, the drive controller of the introduction roller 31 decelerates the introduction speed (feed-in speed) of the fly parts 50 by the introduction roller 31 so as to be synchronized with the feed speed by the lower feed teeth 22.

In this second sewing step, as described above, since the fly over stitch is performed while rotating the fly parts 50 by the automatic arm 5a of the automatic conveyance unit 5, for example, the feed speed by the lower feed teeth 22 is set to the first sewing step If the speed is set to the same speed, it is conceivable that local deviation or wrinkles on the cloth 53 of the fly part 50 may occur more easily than in the first sewing process due to the influence of the press by the sewing machine foot 18. However, as described above, by setting the feed speed by the lower feed tooth 22 and the introduction speed (feed speed) by the introduction roller 31 in the second sewing process slower than in the first sewing process, the fly parts 50 of the introduction roller 31 are In addition to the effect of feeding, it is possible to make it more difficult for the dough 53 of the fly part 50 to shift or wrinkle. In this way, it is possible to stably and smoothly perform the edge stitching on the curved portion 55b of the fly part 50 while rotating the fly part 50.

After the above-described second sewing process is performed at a predetermined distance, the third sewing process is continuously performed. In the third sewing step, the fly parts 50 are moved in parallel with the feed direction of the sewing machine 10 while the fly parts 50 are held by the automatic arm 5a, as shown in FIG. While cutting the part in a straight line with the cutter part 23, the edge stitch is performed along the side edge (the second straight part 55c) formed in the straight line by the cutting, and the side edge of the short side of the fly part 50 Can be done continuously. In FIG. 10, the automatic arm unit 5a is not shown.

In the third sewing process, the feed speed of the lower feed teeth 22 is set to be faster than that of the second sewing process, and preferably faster than the above-mentioned first sewing process. The driving of the introduction roller 31 is stopped, and the feeding operation of the fly part 50 by the introduction roller 31 is temporarily interrupted.

Here, stopping the introduction roller 31 to interrupt the feeding operation means that the driving of the introduction roller 31 by the roller drive unit 33 is continuously stopped while the intermittent feeding by the lower feed tooth 22 is performed twice or more. Say that. When the feeding operation is interrupted, the introduction roller 31 is in contact with the fly parts 50 intermittently fed by the lower feed teeth 22. For this reason, the introduction roller 31 itself is intermittently rotated according to the feed (movement) of the fly part 50 by the frictional force between the introduction roller 31 and the fly part 50, not by the drive by the roller drive unit 33. Be

In the third sewing process of this embodiment, as described above, the feed speed by the lower feed teeth 22 can be increased to speed up the sewing speed of the edge stitching of the fly part 50, thereby efficiently performing the edge stitching. Can be done. In addition, with the increase in sewing speed, for example, the difference between intermittent feeding by the lower feed teeth 22 and continuous feeding by the introduction roller 31 tends to cause negative effects such as catching of the fly parts 50. Of the second straight portion 55 c of the fly part 50 can be stably and smoothly performed. In the third sewing process, edged stitching may be performed while the feeding operation of the fly parts 50 by the introducing roller 31 is performed by driving the introducing roller 31 by the roller driving unit 33 as necessary.

According to the sewing method of the present embodiment as described above, an automatic surging process of performing the overcurl stitching while automatically conveying (moving) the fly parts 50 forming the arc-shaped curved portion 55b. Even if there is a difference in rigidity between the fabric 53 of the fly part 50 and the fastener tape 52 of the slide fastener 51, the fly part 50 is rotated by the introduction roller 31 and the support plate 19 and the sewing machine foot 18 Between them and continuously and forcefully. For this reason, the fly parts 50 may be caught on the sewing machine foot 18 or the support plate 19 during sewing even if the lower feed tooth 22 having a simple structure that is generally used conventionally as a feed mechanism for the fly parts 50 is adopted. Can be effectively performed, and while appropriately feeding both the fabric 53 and the fastener tape 52, edge stitching can be performed smoothly and stably automatically on the side edge of the fly part 50.

Then, after the above-described first to third sewing steps are performed and the edge oversewing (surging) of the fly part 50 is completed, the automatic arm unit 5a holds the fly part 50 from above, and a recovery unit (not shown) As a result, the fly parts 50 subjected to the overlock sewing are accommodated in the recovery unit. As a result, a fly part 50 in which edge stitching is performed along the side edge provided with the arc-shaped curved portion 55 b is produced.
Further, the next rectangular fly part 50 to be sewn over the edge is set at a predetermined position on the table 3 as shown in FIG. 6 while collecting the fly parts 50 as described above. .

By repeating the steps as described above, surging can be performed smoothly and stably and automatically with respect to a plurality of fly parts 50. Therefore, the surging efficiency can be improved and the manufacturing cost of the fly parts 50 can be reduced. be able to. In addition, since the sewing operation of the overedging can be performed automatically and mechanically repeatedly without human hands on the fly part 50 in which the arc-shaped curved portion 55b is formed at the side edge. Thus, it is possible to reduce the occurrence of variations in quality among the plurality of fly parts 50 which are subjected to overturn stitching.

In the introduction roller 31 disposed in the sewing machine 10 of the embodiment described above, as shown in FIG. 2 etc., the roller body 31a in contact with the fly part 50 has a cylindrical shape whose axis is the rotation axis. It is formed. However, the introduction roller in the present invention may be formed such that the roller main body contacting the fly part has a shape as shown in FIG. 11 or a shape as shown in FIG. 12, for example.

For example, the roller body 38a of the introducing roller 38 according to the modification shown in FIG. 11 has a tapered portion in which the dimension in the radial direction from the axial center to the outer peripheral edge of the roller body 38a gradually decreases toward one axial direction (left side) It has a conical shape.
Moreover, the roller main body 39a of the introduction roller 39 which concerns on another modification shown in FIG. 12 is formed in spherical shape.

As compared with the introduction roller 31 of the embodiment described above, the

introduction rollers

38, 39 having the

roller bodies

38a, 39a shown in FIGS. 11 and 12 have contact areas where the

rotating roller bodies

38a, 39a contact the fly parts 50. Although it becomes small, the outer peripheral surface of roller

main body

38a, 39a is formed so that it may become a curved surface curving to a horizontal direction.

Furthermore, in the case of the introduction roller 38 of FIG. 11, although the ridgeline portion (edge portion) is disposed on the contact surface of the roller main body 38a in contact with the fly part 50, the ridgeline portion of the roller main body 38a corresponds to that of the embodiment described above. It is formed gently as compared with the ridge line portion of the introduction roller 38. On the other hand, in the case of the introductory roller 39 of FIG. 12, the entire contact surface of the roller main body 39a in contact with the fly part 50 is formed in a smooth curved surface without ridges.

For this reason, when performing fly-over stitching on the curved portion 55b of the above-described fly part 50 while feeding the fly parts 50 with the

introduction rollers

38 and 39 having the roller body 38a of FIG. 11 or the roller body 39a of FIG. Even when the fly parts 50 are rotated on the upper surface of the support plate 19, the roller

main bodies

38a and 39a are caught on the fly parts 50 more than the roller main body 31a of the introduction roller 31 (FIG. 2) of the embodiment described above. It can be difficult. Thereby, for example, it is possible to increase the sewing speed of the second sewing process described above, and it is possible to efficiently perform surging of the fly part 50 in a shorter time.

Further, in the above-described embodiment, in the third sewing process in which the second straight portion 55c of the fly part 50 is sewn over with the sewing machine 10, the drive of the introduction roller 31 by the roller drive unit 33 is stopped The feeding operation of the fly parts 50 by 31 is interrupted.

On the other hand, in the present invention, in addition to the structure of the sewing machine 10 of the above-described embodiment, for example, the contact position where the roller body 31a of the introduction roller 31 can rotate by contacting the fly part 50 For example, it is possible to move and hold the roller main body 31a between the fly part 50 and the rotatable separated position (for example, the raised position) without contacting the fly part 50, for example. It is also possible to further provide a roller moving unit (not shown).

In the case of a sewing machine provided with such a roller moving portion, for example, a first sewing step of performing an edge stitch on the first straight portion 55a of the fly part 50 and a edge stitching on the curve portion 55b of the fly part 50 (2) In the sewing process, the roller main body 31a of the introduction roller 31 is moved to the contact position (lowered position) by the roller moving unit and held, thereby bringing the roller main body 31a into contact with the fly parts 50. As in the case, the feeding operation of the fly parts 50 by the introduction roller 31 can be stably performed.

Further, in the third sewing step of performing the edge stitching on the second straight portion 55c of the fly part 50, the roller moving portion moves and holds the roller body 31a of the introduction roller 31 to the separated position (raised position). Even if the drive of the introduction roller 31 by the roller drive unit 33 is not stopped (in other words, the drive of the introduction roller 31 by the roller drive unit 33 is continued and the roller body 31a is continuously rotated), Since 31 a is not in contact with the fly part 50, the feeding operation of the fly part 50 by the introduction roller 31 can be temporarily interrupted. Thus, in the third sewing process in which the sewing speed (feed speed of the lower feed tooth 22) is high, the introduction roller 31 is moved to the fly parts 50 by completely separating the roller main body 31a of the introduction roller 31 from the fly parts 50. It is possible to reliably prevent the occurrence of an adverse effect such as hooking, and perform the third sewing process more smoothly and stably.

1 Sewing device (surging device)
3 table (workbench)
5 Automatic transfer unit 5a Automatic arm unit (robot arm)
10 Sewing machine (lock sewing machine)
11 Bed 12 Leg Column 13 Arm 15 Sewing needle 16 Needle bar 17 Presser bar 18 Sewing machine foot

18a Foot body

18b Foot tip 19 Support plate (needle plate)
21 table fixed part 22 lower feed tooth 23 cutter part 23a fixed blade (lower blade)
23b Movable blade (upper blade)
DESCRIPTION OF SYMBOLS 31 introduction roller 31a roller main body 31b rotary shaft 31c roller core 31d outer peripheral edge 32 roller holding part 33 roller driving part 34 first pulley 35 second pulley 36 belt 38 introduction roller 38a roller main body 39 introduction roller 39a roller main body 50 fly Parts 51 Slide fastener 52 Fastener tape 53 Fabric 55a 1st straight part 55b Curved part 55c 2nd straight part

Claims

A support plate (19) on which the workpiece (50) is placed, a sewing machine foot (18) for pressing the workpiece (50) toward the support plate (19), and the support plate (19) Sewing machine (10) comprising: a sewing needle (15) moving up and down; and a lower feed tooth (22) for intermittently conveying the material to be sewn (50) by contacting the material to be sewn (50) from the lower surface side. In),
The sewing machine (10) introduces the material to be sewn (50) between the support plate (19) and the sewing machine foot (18) by rotating in a state of being in contact with the material to be sewn (50) An introduction roller (31, 38, 39), and a roller drive unit (33) for continuously rotating the introduction roller (31, 38, 39);
The introduction roller (31, 38, 39) is disposed upstream of at least the position of the sewing needle (15) with respect to the feeding direction of the sewn article (50) by the lower feed tooth (22).
A sewing machine characterized by
The introduction roller (31, 38, 39) contacts the sewn article (50) at a position upstream of the position where the pressing surface of the sewing machine foot (18) contacts the sewn article (50) The sewing machine according to claim 1.
A drive control unit for controlling the drive of the roller drive unit (33);
The drive control unit controls the rotational speed of the introduction roller (31, 38, 39) in accordance with the feed speed of the sewn article (50) by the lower feed tooth (22), and the sew Controlling the operation and stop of the roller drive unit (33) corresponding to the sewing location of the object (50),
The sewing machine according to claim 1 or 2.
The introduction roller (31, 38, 39), the contact position where the introduction roller (31, 38, 39) contacts the sewn article (50), and the introduction roller (31, 38, 39) A roller moving unit is disposed to move the sewing product (50) to a separation position away from the sewing material (50);
The roller moving unit moves and holds the introduction roller (31, 38, 39) to the contact position or the separated position corresponding to the sewing location of the sewn article (50).
The sewing machine according to any one of claims 1 to 3.
The introduction roller (31, 38, 39) has a cylindrical shape having a constant dimension in the radial direction from the axial center of the introduction roller (31, 38, 39) to the outer peripheral edge, the introduction roller (31, 38, 39) has a conical shape or a spherical shape provided with a tapered portion at least a part of which the radial dimension from the axial center to the outer peripheral edge gradually decreases in one of the axial directions. The sewing machine according to any one of -4.
The sewing machine according to any one of claims 1 to 5, wherein edge stitching is performed on the workpiece (50).
A cutter unit (23) for cutting the sewn article (50);
The cutter unit (23) is a position at which the introduction roller (31, 38, 39) contacts the sewn article (50) with respect to the feeding direction by the lower feed tooth (22), and the sewing needle (15) Placed between the position of
The sewing machine according to claim 6.
The sewing machine (10) according to any one of claims 1 to 7 and the feed of the sewing material (50) by the lower feed teeth (22) when sewing the sewing material (50) by the sewing machine (10) And an automatic rotating portion (5) capable of automatically rotating the sewn article (50) with a predetermined operation.
A support plate (19) on which the workpiece (50) is placed, a sewing machine foot (18) for pressing the workpiece (50) toward the support plate (19), and the support plate (19) Sewing machine (10) comprising: a sewing needle (15) moving up and down; and a lower feed tooth (22) for intermittently conveying the material to be sewn (50) by contacting the material to be sewn (50) from the lower surface side. In the sewing method for sewing the sewing material (50) using
An introduction roller (31, 38, 39) for introducing the sewn article (50) between the support plate (19) and the sewing machine foot (18), and the introduction roller (31, 38, 39) are continuous. Using the sewing machine (10) further comprising: a roller drive unit (33) for rotationally driving the motor;
When sewing at least a part of the sewn article (50), the introduction roller (31, 38, 39) is brought into contact with the sewn article (50) and the introduction by the roller drive unit (33) Introducing the material to be sewn (50) between the support plate (19) and the sewing machine foot (18) by continuously rotating the rollers (31, 38, 39);
A sewing method comprising:
And synchronizing the feed speed of the sewn article (50) by the lower feed teeth (22) and the introduction speed of the sewn article (50) by the introduction rollers (31, 38, 39). The sewing method according to claim 9.
Using a fly part (50) attached with a slide fastener (51) as the sewn article (50);
Performing an oversewing on the fly part (50) using the sewing machine (10);
The lead-in roller (31, 38, 39) is brought into contact with the fly part (50) when the edge oversewing is performed on the at least arc-shaped curved portion (55b) formed on the fly part (50) And continuously rotating the introduction roller (31, 38, 39) by the roller drive unit (33).
The sewing method according to claim 9 or 10, comprising
When performing the edge oversewing on the linear side edge (55c) continuously formed from the curved portion (55b) to the fly part (50), the roller drive (33) The sewing method according to claim 11, comprising stopping driving of the introduction roller (31, 38, 39) or separating the introduction roller (31, 38, 39) from the fly part (50).