JP6094977B2 - Sewing machine and process for sewing together at least two overlapping fabric edges using said sewing machine - Google Patents

Description

  The present invention relates to an "overlock" "cut and saw" type sewing machine for stitching together at least two overlap of textiles belonging to one or more textile products. The invention further relates to a process for stitching together at least two overlapping fabric edges using an overlock cut and saw type sewing machine.

  For example, the “Overlock” “Cut and Saw” sewing machine is a UNION SPECIAL in one of the 9M series models, for example as described in the relevant instruction manual and the catalog 103XQA-GR in November 2006. (Registered trademark) type machines and the like.

  The type of stitch, also known as overlock or overedge, is itself widely known in the art and therefore will not be described in further detail herein. As is well known, this type of sewing machine can be used in many applications, one of which is the sewing of lightweight fabric products such as women's tights. These sewing machines, in particular, automatically assemble fabric products, where a plurality of fabric products are assembled together (eg, assembling two tubular stocking legs to form a single fabric product known as pantyhose). It can be applied as a known machine component for.

  In the field of these assembling machines for fabric products, overlock cut-and-sew type sewing machines move the appropriate sewing needle and a known type of element known as a “cloche” without any operator intervention. In this way, the cutting of at least two fabric edges is carried out completely automatically. As is well known, the type of sewing realized by an overlock cut-and-sew type sewing machine in which two fabric edges are stitched one on top of the other is often excessive for optimal use of the product. It may have a thickness and therefore may be aesthetically unattractive and uncomfortable for the wearer of the product.

  An example of this known type of sewing machine is described in US Pat. No. 3,079,882 (Washburn), which illustrates an over-edge type sewing machine having a specific needle plate and two needles. The contents of which are to be considered incorporated herein by reference with respect to the description of the formation of sewing stitches.

  The two-stitch sewing realized by this machine allows for effective stitching of two fabric edges, but in certain applications is too thick, for example in sewing tights, generally lightweight fabrics, In this regard, the presence of stitching in the relief can be troublesome.

  A further example of an over-edge type sewing machine comprises three sewing needles cooperating with a needle plate having two passing seats for the needle, the first needle passing through the associated seat and the rest Illustrated in US Pat. No. 3,885,509 (Cox), which describes a machine in which two needles are adapted to pass through another common seat. This solution has been proposed in an attempt to obtain stitching that is thin and equally efficient, but the results are only partially satisfactory.

  A third solution that has been proposed is illustrated in US Pat. No. 6,167,825 (Marchetti), where the overlock type sewing machine includes two sewing needles, A needle plate having a side appendage is provided, the side appendage having a first portion with a substantially parallel surface and a narrow second portion. The contents of this patent should be considered to be incorporated herein by reference with respect to the description of the structure of the textile machine and the formation of the sewing stitches.

  Such a solution can then be stretched even better, resulting in a better separation of the two sewn fabric edges, thus obtaining an “overlock” stitching with a thin seam The purpose was to be able to. This solution also has drawbacks. This is because the presence of the first parallel position may prevent the stitching stitch from sliding, and the needle plate configuration illustrated in the patent is not very tight at the junction of the two fabric edges. This entails the risk of opening the stitching at several points, especially in the case of lightweight fabrics, with aesthetic and functional disadvantages.

  The object of the present invention is to obviate one or more of the aforementioned drawbacks.

  It is an object of the present invention to provide an overlock cut-and-strap that can overlap and stitch together at least two fabric edges belonging to one or more fabric products, such as to achieve a fabric product that is of high quality and substantially free of defects. It is to provide a saw type sewing machine.

  A further object of the present invention is to provide an overlock cut-and-sew type sewing machine capable of reducing production waste.

  It is a further object of the present invention to provide an overlock cut-and-sew type sewing machine that is capable of obtaining high quality, fully “closed” sewing at the point of joining between two fabric edges.

  A further object of the present invention is to provide an overlock cut-and-sew that can be stitched with stitches that can be controlled and expanded to achieve a wider and / or flatter sewing effect with respect to stitches with known stitches. Is to provide a type of sewing machine.

  A further object of the present invention is to provide an overlock cut-and-sew type sewing machine capable of obtaining a product having a high degree of uniformity within the range of various articles produced.

  A further object of the present invention is to provide an overlock cut-and-sew type sewing machine that can easily, quickly, and automatically obtain stitched seams, and can be incorporated into an automatic machine for assembling fabric products in particular. It is to be.

  It is a further object of the present invention to provide an overlock cut-and-sew type sewing machine that is simple, rugged and economical to manufacture in terms of moderate modifications with respect to known types of sewing machines.

  Furthermore, these and other objects, which will become better apparent in the course of the following description, are substantially due to the process for overlock cut and saw type sewing and use thereof according to the appended claims. These are accomplished in any combination with each other and / or with one or more of the embodiments set forth herein below.

  In alone or in one aspect construed in combination with any one of the claims or any of the embodiments set forth below, the invention further includes any of the appended claims or the embodiments shown. For a sewing machine according to one, the yarn is supplied to the upper cloche and the yarn is not supplied to the lower cloche, so the lower cloche is “blind” or the yarn is attached to the lower cloche. Supplied and no upper cloche is supplied with the yarn, and therefore the upper cloche is “blind” or is fed to both the upper and lower cloche.

  In a further aspect, construed alone or in combination with any one of the claims or any of the embodiments set forth below, the invention further includes any of the appended claims or the embodiments shown. In this sewing machine, at least one of the seats for allowing the sewing needles to pass therethrough is dimensioned to allow two adjacent sewing needles to pass therethrough.

  In a further aspect, construed alone or in combination with any one of the claims or any of the embodiments set forth below, the invention further includes any of the appended claims or the embodiments shown. With respect to the sewing machine according to one, the sewing machine comprises at least two separation parts, or the separation parts each have a thickness of at least 0.6 mm or at least 0.8 mm or at least 1 mm.

  In a further aspect, construed alone or in combination with any one of the claims or any of the embodiments set forth below, the invention further includes any of the appended claims or the embodiments shown. With respect to the sewing machine according to any one of the above, the separating part has a longitudinally extending part of at least 0.5 cm, or at least 1 cm, or at least 1.5 cm along the advance direction of the cloth edge.

  In a further aspect, construed alone or in combination with any one of the claims or any of the embodiments set forth below, the invention further includes any of the appended claims or the embodiments shown. In this sewing machine, the needle plate is made of a metal material, and the opening that defines the seat is realized by groove cutting of the needle plate.

  In a further aspect, construed alone or in combination with any one of the claims or any of the embodiments set forth below, the invention further includes any of the appended claims or the embodiments shown. With respect to one of the sewing machines, the separating part is defined by separating the elements attached to the needle plate with corresponding mounting seats.

  In a further aspect, construed alone or in combination with any one of the claims or any of the embodiments set forth below, the invention further includes any of the appended claims or the embodiments shown. With respect to the sewing machine according to any one of the above, the slide line of the side appendage is at least an area extending between the passing area of the sewing needle and the end of the side appendage, or the extension of the side appendage. In general, it forms a generally curved shape that traverses the general longitudinal direction of the side appendages and / or the sliding direction of the fabric edges.

  In a further aspect, construed alone or in combination with any one of the claims or any of the embodiments set forth below, the invention further includes any of the appended claims or the embodiments shown. With regard to the sewing machine according to this one, the substantially curved form is substantially concave, or the substantially curved form is substantially convex.

  In a further aspect, construed alone or in combination with any one of the claims or any of the embodiments set forth below, the invention further includes any of the appended claims or the embodiments shown. With regard to the sewing machine according to any one of the above, the device for stretching the yarn from the upper cloche and / or the lower cloche is a stretching blade that vibrates in synchronization with the sewing needle support device.

  In a further aspect, either alone or in combination with the claims or any one of the aspects suggested below, the present invention further includes the appended claims or the aspects shown. Regarding the sewing machine according to any one, the sewing machine is automatic and / or incorporated into a machine for assembling a fabric product.

  In a further aspect, either alone or in combination with the claims or any one of the aspects suggested below, the present invention further includes the appended claims or the aspects shown. With respect to the sewing machine according to any one of the above, the needle thread feeder and the thread feeder are of an active type capable of actively feeding the thread to the needle or the cloche, or the needle thread feeder and the thread feeder. The vessel is of a passive type and can passively supply a thread that is pulled directly by a needle or cloche.

  In a further aspect, the present invention further relates to a needle plate according to the features indicated in the claims or any one of the aspects indicated below.

  In a further aspect, the present invention further relates to a sewing needle support device according to the features indicated in the claims or in any one of the aspects indicated below.

  In a further aspect, the present invention further relates to at least one needle plate and at least three sewing needles according to the features set forth in any one of the claims or any of the aspects set forth herein below. And an overlock cut-and-sew type sewing machine.

  In a further aspect, the present invention further relates to a machine for assembling a fabric product comprising a sewing machine according to any one of the appended claims or the aspects set forth herein.

  In a further aspect, the present invention relates to an instrument for an overlock cut-and-sew type sewing machine for sewing at least two overlapping fabric edges belonging to one or more fabric products, wherein the instrument forms a sewing stitch. A needle plate suitable for supporting at least two overlapping fabric edges of one or more fabric products sliding on a through opening defining respective seats for passing a sewing needle, and sewing stitches At least one needle plate provided with at least one side appendage that defines a slide line for the needle, and further comprising at least one sewing needle support device with three sewing needles attached thereto, Are arranged and aligned with each other, and the respective sewing thread is supplied to the sewing needles. Suitable for passing through the needle plate seat to sew the cloth edge, the needle plate is provided with at least three seats for passing the sewing needle, and the seat for passing the sewing needle Each of which is configured to be intersected by at least one corresponding sewing needle, the needle plate for passing the sewing needle so that at least three separate sewing stitches spaced apart from each other can be formed in parallel. Each of the seats is provided with at least a separating part suitable for separating at least partly from adjacent seats for the passage of the needle in the needle passage area.

  Further features and advantages will become more fully apparent from the detailed description of the preferred but non-exclusive embodiments with reference to the accompanying drawings of the drawings.

It is a perspective view of some components of a sewing machine concerning one embodiment of the present invention. It is a perspective view of some components of a sewing machine concerning one embodiment of the present invention. FIG. 2 is an enlarged view of the components of FIG. 1, particularly the needle support device. FIG. 2 is an enlarged view of the components of FIG. 1, particularly the lower cloche. It is the enlarged view seen from the upper side of the component of FIG. 1, especially a needle plate. FIG. 2 is a detail of the sewing machine of FIG. 1 associated with the step of forming a stitching stitch, with the needle plate cut for clarity. It is the figure which looked at the formation step of the sewing stitch on two cloth edges in the needle plate of FIG. 5 from the upper side. FIG. 8 is a front cross-sectional view of the needle plate of FIG. 7 illustrating a sewing stitch realized with the needle plate. FIG. 8 is a plan view of two fabric edges sewn using the process according to one embodiment of the present invention shown in FIG. 7 with the fabric partially separated and the stitched stitch stretched. FIG. 10 is a side view of the two fabric ends of FIG. 9 sewn using the process according to one embodiment of the present invention and partially separated by stretching the stitched stitch.

  Referring to the drawings, 1 generally represents an overlock cut and saw type sewing machine for sewing together at least two overlapping fabric ends 3a, 3b belonging to one or more fabric products.

  FIG. 1 shows some essential components of a sewing machine 1. The remainder of the sewing machine 1 is of a known type and is therefore not shown in the accompanying drawings and will not be described in detail here.

  The sewing machine 1 comprises at least one needle plate 2 capable of supporting at least two overlapping fabric ends 3a, 3b of one or more sliding fabric products to form a sewing stitch.

  The needle plate 2 has a through opening that defines a respective seat 4 for allowing the sewing needle 5 to pass through, and at least one side appendage 6 that defines a slide line 7 for the sewing stitches 10a, 10b and 10c. Is provided.

  The needle plate 2 is provided with at least three seat portions 4 for allowing the sewing needles 5 to pass therethrough, and each of the seat portions 4 for allowing the sewing needles 5 to pass therethrough is intersected by at least one corresponding sewing needle 5. Composed. The needle plate 2 is provided for passing adjacent sewing needles 5 through each seat for passing the sewing needles 5 so that at least three sewing stitches 10a, 10b, 10c separated from each other can be formed. Each separating part 8 that can be at least partially separated from the seat part 4 is provided in at least the passage region 9 of the needle 5.

  Each seat 4 for passing the needle 5 can be sized and configured to allow a single corresponding needle to pass, as in the embodiment shown in the accompanying drawings. The seats 4 for allowing the sewing needles 5 to pass through can be completely separated from one another over the entire extension of the seat 4 by the separating part 8. The seat 4 for passing the sewing needle 5 can be defined by completely separate through openings.

  The needle plate 2 can comprise at least two separation parts, or each of the separation parts 8 has a thickness of at least 0.6 mm or at least 0.8 mm or at least 1 mm. The separating part 8 can have a longitudinally extending part of at least 0.5 cm, or at least 1 cm or at least 1.5 cm along the advance direction of the fabric ends 3a, 3b.

  The needle plate 2 can be formed from a metal material, and the opening that defines the seat 4 can be realized by cutting the groove of the needle plate 2. Alternatively, for example, the separating part 8 can be defined by separating the elements attached to the needle plate 2 with corresponding mounting seats.

  In a variant embodiment not shown, at least one of the seats 4 for passing the sewing needle 5 can be dimensioned to allow the passage of two adjacent sewing needles 5, and therefore Four needles 5 can be provided that pass through the three seats, in which case the two needles 5 pass through the common seat. The sewing machine 1 further includes at least one sewing needle support device 11 such as a needle support bar.

  The sewing machine 1 further comprises at least three sewing needles 5 attached to the sewing needle support device 11, which are arranged on the sides of each other and aligned with respect to each other, and these sewing needles have respective ones for the needles. The sewing thread 10 is supplied. The sewing needle 5 is suitable for passing through the seat 4 of the needle plate 2 in order to sew the cloth ends 3a, 3b that overlap.

  The needle 5 is 1.4 to 2.8 mm or 1.5 to 2.5 mm or 1.6 to 2.0 mm, which is defined by the distance between the axes, corresponding to the distance between the small holes 19 of the needle 5 from which the respective sewing thread comes out. Can be attached to the needle support device 11 with a mutual distance of.

  The needles 5 can be attached to the needle support device 11 at equal intervals with equal distances between adjacent needles 5.

  In a modification (not shown), the needles can be attached with different axes between the needles. The needles can be of the same size and the same thread or different threads of the same size can be fed to the needle. Alternatively, the needles can have different sizes and different sized threads can be fed to the needles.

  As can be seen from FIG. 7, the slide line of the side appendage 6 is at least in the area extending between the passage area 9 of the sewing needle 5 and the front end of the appendage 6, or over the entire extension of the appendage. , Generally in the form of a straight line traversing the general longitudinal direction of the side appendage 6 and / or the sliding direction of the cloth ends 3a, 3b.

  The side appendage 6 has a front part 6a with a narrow end having a thickness of less than 2 mm or less than 1 mm or less than 0.5 mm measured in the through plane for the upper mounting surface of the needle plate 2. be able to.

  The side appendage 6 may have a rear base portion 6b on the opposite side of the front end with a transverse thickness of 4 mm to 7 mm, or 5 mm to 6.5 mm, or 5.5 to 6 mm in the longitudinal extension. .

  The side appendages 6 can have a thickness 6c in the passage area 9 of the sewing needle 5 of 3 mm to 6 mm, or 4 mm to 5.5 mm, or 4.2 to 5 mm that traverses the longitudinal extension. This transverse thickness may be greater than 3 mm, greater than 3.5 mm, greater than 4 mm, or greater than 4.2 mm.

  Alternatively, the slide line 7 of the side appendage 6 is at least a portion extending between the passing region 9 of the sewing needle 5 and the end of the appendage 6, or in all of the extension portions of the appendages. 6 generally longitudinally extending directions and / or substantially curved forms traversing the sliding direction of the cloth ends 3a, 3b can be formed. The substantially curved form can be substantially concave or substantially convex.

  As can be seen from FIG. 8, at least one of the side appendages 6 and / or the separators 8 that define at least the slide line and / or all of the separators 8 are in the vicinity of the needle plate 2 of the lower claw. It can be terminated downward or tapered to allow passage through.

  The sewing machine 1 further includes an advance device (not shown to form a known conventional type) that can advance the overlapping fabric ends 3a, 3b along the advance direction with respect to the needle plate 2 during the sewing operation. Can do.

  As shown in FIG. 7, the sewing machine 1 sets the cloth ends 3 a and 3 b on the upstream side of the side appendages 6 along the advance direction of the cloth ends 3 a and 3 b and in the vicinity of the side appendages 6. An apparatus 12 for cutting at the cutting line 20 can be further provided.

  The sewing machine 1 can further comprise at least one thread feeder for the needle 5 that can supply the sewing thread 10 to the needle 5 of the sewing machine.

  The sewing machine 1 further comprises at least one lower cloche 14 and at least one upper cloche 15 that can help to form the stitches 10a, 10b, 10c.

  The sewing machine 1 further includes at least one yarn feeder 16 capable of supplying yarn from between the upper cloche 15 and the lower cloche 14 to at least one thereof.

  In the first embodiment shown in the figure, the yarn 17 is supplied to the lower cloche 14 and no yarn 17 is supplied to the upper cloche 15, so the upper cloche is of the “blind” type.

  In a variant not shown, the yarn 17 can be supplied to the upper cloche 15 and the yarn 17 cannot be supplied to the lower cloche 14, so the lower cloche is of the “blind” type. .

  In a further variant not shown, the yarn 17 can be supplied to both the upper cloche 15 and the lower cloche 14. In the illustrated embodiment, the lower cloche 14 to which the binding thread 17 is fed helps to form the sewing stitches 10a, 10b, 10c using the respective binding thread 17 that cooperates with the sewing thread 10, while the binding thread is The upper cloche 15 that is not supplied or “blind” helps to form the sewing stitches 10 a, 10 b, 10 c by acting on the yarn 17 supplied by the lower cloche 14.

  The sewing machine 1 further comprises a device 18 for stretching the yarn 17 from the upper cloche 15 and / or from the lower cloche 14. The stretching device 18 for the binding yarn 17 from the upper cloche 15 and / or the lower cloche 14 may be, for example, a stretching blade that vibrates in synchronization with the sewing needle support device 11.

  The yarn feeder 13 for the needle 5 and the yarn feeder 16 for the binding yarn may be of an active type capable of actively supplying the yarn to the needle 5 or the cloche, or alternatively, the needle yarn supply The device 13 and the yarn feeder 16 are of the passive type and may be capable of passively supplying the yarn that is pulled directly by the needle 5 or by the cloche.

  In a modification (not shown), the sewing machine 1 can include four sewing needles 5 attached to the needle support device 11, and four openings for allowing the sewing needles 5 to pass therethrough can be provided in the needle plate.

  The present invention also relates to an instrument for an overlock cut-and-sew type sewing machine 1, wherein the instrument forms, as described above, the formation of at least three separate stitches 10a, 10b, 10c spaced apart from each other. In order to be possible, at least one needle plate 2 and at least three sewing needles 5 are provided.

  The instrument in principle comprises the components shown in FIG. The sewing machine 1 may be an automatic type, particularly when the sewing machine 1 is incorporated in a machine for assembling fabric products.

  Furthermore, the invention relates to a machine for assembling a fabric product comprising a sewing machine 1 of the aforementioned type, which is of a known type and is not described here. The sewing machine will not be described in further detail because the rest of the sewing machine is similar to the prior art and is of a known type.

  The invention also relates to a process for stitching together at least two overlapping fabric ends 3a, 3b using an overlock cut-and-sew type sewing machine 1, the process comprising at least two overlapping fabric ends 3a, 3b of a fabric product. Is supplied to the needle plate 2 of the overlock cut-and-sew type sewing machine 1, and the needle plate 2 is provided with at least three openings at least partially separate from each other for the passage of the sewing needle 5. A step, a step of advancing the cloth ends 3a, 3b relative to the needle plate 2, a step of progressively cutting the side portions of the cloth ends 3a, 3b, and at least three sewing needles 5 arranged on the side surfaces. At least one respective sewing needle supplied with the respective sewing thread 10 so as to sew the cloth ends 3a, 3b together. Through at least three separate stitches 10a, 10b, in cooperation with at least one lower cloche 14 and at least one upper cloche 15, 10c, and at least including a step of supplying the binding yarn 17 to at least one of the cloche.

  Various aspects of the process corresponding to the further aspects described above in connection with the sewing machine are not repeated herein.

  Further aspects of the sewing stitch formation process that are not described in detail herein and are not derived from the inherent features of the sewing machine described above should be regarded as conventional types.

  The present invention, as it will be recalled, is amenable to many variations and modifications, all falling within the scope of the inventive concept, and the recited components may be replaced with other technically equivalent elements. Can be replaced.

  The present invention provides important advantages.

  In principal, the present invention can eliminate at least some of the disadvantages of the prior art.

  In addition, the present invention can realize a high-quality fabric product that is substantially free of defects by stitching together at least two overlapping fabric edges belonging to one or more fabric products.

  Furthermore, the present invention can provide a high quality, fully “closed” seam at the junction point between two fabric edges and / or reduce production waste.

  Furthermore, the present invention makes it possible to obtain a seam that can be expanded in a controlled manner to give a wider and / or flatter stitching effect over known stitching.

  In addition, the present invention allows a product to be obtained with a high level of uniformity among the various articles produced.

  The invention also makes it possible to realize stitching easily, quickly and automatically, especially by incorporating a sewing machine into a known type of automatic machine for assembling fabric products.

  The present invention is also simple, rugged, relatively economical to manufacture and ensures a high level of reproducibility and safety.

Claims (9)

An overlock cut-and-sew type sewing machine for sewing at least two overlapping fabric edges (3a, 3b) belonging to one or more fabric products,
A needle plate (2) suitable for supporting at least two overlapping fabric edges (3a, 3b) of one or more fabric products sliding to form a sewing stitch (10a, 10b, 10c) The needle plate (2) has through openings defining the respective seats (4) for allowing the sewing needle (5) to pass therethrough, and slide lines (7 for the sewing stitches (10a, 10b, 10c)). A needle plate (2) provided with at least one side appendage (6) defining
A lower crocheted crochet (14),
Upper crocheted crochet (15),
An advancement device suitable for advancing the overlapping fabric ends (3a, 3b) along the advance direction relative to the needle plate (2) during a sewing operation;
The overlapping fabric ends (3a, 3b) are connected to the fabric product on the upstream side of the side appendages (6) along the forward direction of the fabric ends (3a, 3b) and in the vicinity of the side appendages. A device (12) for cutting corresponding to the cutting line (20);
At least one needle thread supply (13) suitable for supplying the sewing thread (10) to the sewing needle (5) of the sewing machine;
At least one yarn feeder (16) suitable for supplying a yarn (17) to at least one of the upper crocheted crochet (15) and the lower crocheted crochet (14);
An apparatus (18) for stretching the yarn (17) from the upper crocheted crochet (15) and / or the lower crocheted crochet (14);
A sewing machine comprising at least one sewing needle support device (11),
At least three sewing needles (5) attached to the sewing needle support device (11) are provided, and these sewing needles are arranged on the side surfaces and aligned with each other, and each sewing thread (10 ) And the sewing needle (5) is suitable for passing through the seat (4) of the needle plate (2) to sew the overlapping fabric ends (3a, 3b), The plate (2) is provided with at least three seat portions (4) for allowing the sewing needle (5) to pass therethrough, and each of the seat portions (4) for allowing the sewing needle (5) to pass therethrough, Constructed to be crossed by at least one corresponding sewing needle, the needle plate (2) is shaped in parallel with at least three separate sewing stitches (10a, 10b, 10c) spaced apart from each other. Each of the seats for allowing the sewing needle (5) to pass through is suitable for separating at least partly from an adjacent seat (4) for allowing the sewing needle (5) to pass through Is provided at least in the passage region (9) of the sewing needle (5) , and the side appendage (6) and the separation part (8) are all attached to the needle plate (2). to allow passage of the lower crochet crochet (14) in the vicinity, sewing machine, characterized in Rukoto tapered downward.   2. Each of the seats (4) for passing the sewing needle (5) is dimensioned and configured to allow a single corresponding sewing needle to pass through. Sewing machine.   The seat (4) for passing the sewing needle (5) is completely separated from each other over the entire extension of the seat (4) by the separating part (8) and / or Sewing machine according to claim 1 or 2, characterized in that it is defined by through openings which are completely separate from one another.   The sewing needle (5) is attached to the sewing needle support device (11) at a mutual distance of 1.4 to 2.8 mm or 1.5 to 2.5 mm or 1.6 to 2.0 mm defined by the distance between the axes. And / or the sewing needles (5) are mounted at equal intervals on the sewing needle support device (11) with equal distances between adjacent sewing needles (5). The sewing machine according to any one of the above. The slide line (7) of the side appendage (6) extends at least between the passing area (9) of the sewing needle (5) and the front end of the side appendage (6); Alternatively, a linear form traversing the general longitudinal advance direction of the side appendage (6) and / or the sliding direction of the fabric ends (3a, 3b) over the entire extension of the side appendage. The sewing machine according to any one of claims 1 to 4 , comprising: The side appendage (6) has a narrow end having a thickness of less than 2 mm or less than 1 mm or less than 0.5 mm measured in a plane that penetrates the upper mounting surface of the needle plate (2). A rear base portion having a front portion and having a thickness of 4 mm to 7 mm, or 5 mm to 6.5 mm, or 5.5 to 6 mm across the longitudinal extension of the side appendage on the opposite side of the front end portion The sewing machine according to any one of claims 1 to 5 , comprising: 3. The side appendage (6) traverses the longitudinal extension of the side appendage to the passing area (9) of the sewing needle (5), 3 mm to 6 mm or 4 mm to 5.5 mm or 4. Having a thickness of 2-5 mm, or wherein the transverse thickness is greater than 3 mm, greater than 3.5 mm, greater than 4 mm, or greater than 4.2 mm. Item 7. The sewing machine according to any one of Items 1 to 6 . Four sewing needles (5) attached to the sewing needle support device (11) are provided, and the needle plate (2) is provided with four through-openings for allowing the sewing needle (5) to pass therethrough. The sewing machine according to any one of claims 1 to 7 . A process for stitching together at least two overlapping fabric edges (3a, 3b) using an overlock cut and saw machine (1),
Disposing at least two overlapping fabric ends (3a, 3b) in correspondence with the needle plate (2) of the overlock cut-and-sew type sewing machine (1) for passing the sewing needle (5); In addition, the needle plate (2) has at least three separate openings defining a seat (4) and at least one slide line (7) for sewing stitches (10a, 10b, 10c). A side appendage (6) is provided;
Each of the seats (4) is configured to be dimensioned to allow a single corresponding sewing needle (5) to pass through; and
The needle plate (2) is provided with respective separating portions (8) suitable for separating each of the seat portions for allowing the sewing needle (5) to pass from the adjacent seat portions (4). , Steps and
All of the side appendages (6) and the separating part (8) taper downwards to allow the passage of the lower crocheted crochet (14) in the vicinity of the needle plate (2). The steps to configure
Advancing the fabric ends (3a, 3b) relative to the needle plate (2);
Progressively cutting the sides of the fabric ends (3a, 3b);
At least one respective sewing needle to which each sewing thread (10) is supplied, such that at least three sewing needles (5) arranged on the side surfaces sew the cloth ends (3a, 3b) together, Through each of the three openings for passing a sewing needle (5), in cooperation with at least one lower crocheted crochet (14) and at least one upper crocheted crochet (15); Realizing at least three separate sewing stitches (10a, 10b, 10c), and supplying a yarn (17) to at least one of the crocheted crochets.

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