Sewing machine and method for producing sewn product

Abstract

[Problem] To provide a sewing technology capable of improving designability of a sewn product. [Solution] Provided is a sewing machine equipped with two sewing needle parts and a guide part in contact with the upper surface of an object to be sewn, wherein the guide part is arranged on a line extending from between the two sewing needle parts to the un-sewn side of the object to be sewn. In the sewing machine according to the present technology, the guide part can come into contact with the object to be sewn at a plurality of locations.

Description

Sewing machine and method for manufacturing sewing products

[0001] The present technology relates to a sewing machine, and more particularly to a sewing machine and a method for producing a sewn product using the sewing machine.

[0002] In vehicles such as automobiles, there is an increasing need for passenger comfort and a luxurious feel, and therefore many parts with sewn surfaces are used in vehicle interior fittings. For example, Patent Document 1 discloses a skin body that is molded to match the outer shape of a product, has a recess in part that is folded inward, and the skin of the recess is sewn together, and it describes that this skin body can be used in automobile interior fittings.

[0003] Japanese Patent Application Publication No. 02-248216

[0004] Since such vehicle interior parts require higher design quality, development of sewing techniques is also progressing, but the reality is that even higher level manufacturing techniques are being desired.

[0005] Therefore, a main object of the present technology is to provide a sewing technology that can improve the design of the sewn product.

[0006] The present technology first provides a sewing machine including two needle units and a guide unit that contacts the top surface of a sewing object, the guide unit being arranged on a line extending from between the two needle units to the non-sewn side of the sewing object. In the sewing machine according to the present technology, the guide unit can contact the sewing object at multiple locations, for example, three or more locations. The sewing object of the sewing machine according to the present technology may include piping. In this case, the guide unit can be arranged to contact the piping. The guide unit of the sewing machine according to the present technology can be connected to the sewing machine body on the non-sewn side of the sewing object relative to the needle units. The guide unit of the sewing machine according to the present technology may include a rotating body. In this case, the rotating body may be arranged to contact the top surface of the sewing object. The guide unit of the sewing machine according to the present technology may be made of rubber or elastomer.

[0007] Next, the present technology provides a method for manufacturing a sewn product, in which a sewing object is sewn using the sewing machine according to the present technology.

[0008] 3 is a schematic front view showing a first embodiment of a sewing machine 1 according to the present technology. FIG. 4 is a schematic left side view showing a first embodiment of a sewing machine 1 according to the present technology. FIG. 5 is a schematic front cross-sectional view showing a cross section cut at a guide portion 12 when sewing a sewing object 2 using the sewing machine 1 according to the first embodiment. FIG. 6 is a cross-sectional view taken along line A-A in FIG. 3. FIG. 7 is a schematic front view showing a second embodiment of a sewing machine 1 according to the present technology. FIG. 8 is a schematic front cross-sectional view showing a cross section cut at a guide portion 12 when sewing a sewing object 2 using the sewing machine 1 according to the second embodiment. FIG. 9 is a schematic front view showing a schematic front cross-sectional view showing a cross section cut at a guide portion 12 when sewing a sewing object 2 using the sewing machine 1 according to the third embodiment.

[0009] Preferred embodiments for implementing the present technology will be described below. The embodiments described below are examples of typical embodiments of the present technology, and any of the embodiments can be combined. Furthermore, the scope of the present technology is not to be interpreted narrowly by these embodiments.

[0010] 1. Sewing Machine 1 Fig. 1 is a schematic front view showing a first embodiment of a sewing machine 1 according to the present technology. Fig. 2 is a schematic left side view showing the first embodiment of a sewing machine 1 according to the present technology. The sewing machine 1 according to the present technology includes a sewing needle unit 11 and a guide unit 12. In addition, the sewing machine 1 according to the present technology can also be freely combined with other components, mechanisms, etc. that are included in a general sewing machine, as long as the operation and effect of the present technology are not impaired. The sewing machine main body and each part will be described in detail below.

[0011] (1) Sewing Machine Body B The shape of the sewing machine body B of the sewing machine 1 according to the present technology can be freely adopted as a shape of a general sewing machine as long as the effect of the present technology is not impaired. For example, the sewing machine body B can include a bed portion B1 on which the sewing object 2 is placed during sewing, a pillar portion B2 erected on the bed portion B1, a head portion B3, and an arm portion B4 connecting the head portion B3 and the pillar portion B2.

[0012] Furthermore, as long as the effects of the present technology are not impaired, the various components of the sewing machine body B may freely adopt structures that are included in the body of a typical sewing machine. For example, although not shown, the bed B1 may be equipped with a rotary hook that stores a bobbin wound with lower thread and a feed dog for feeding the sewing object 2, while the pillar B2, head B3, or arm B4 may be equipped with switches for various settings, an operation panel, a display that displays setting conditions, a thread hook, etc. Furthermore, various rotary shafts and axes for cooperating with the sewing needle 111 and rotary hook, which will be described later, and a control unit for controlling these may be provided inside each component.

[0013] (2) Sewing needle unit 11 The sewing machine 1 according to the present technology has two sewing needle units 11. The sewing needle unit 11 is a portion where a sewing needle is disposed, and specifically includes a sewing needle 111, which is a sewing needle, a needle fixing unit 112 that fixes the sewing needle 111, and a pressure foot 113. In addition, the sewing needle unit 11 according to the present technology can be freely combined with other components and mechanisms that are included in the sewing needle unit of a general sewing machine, as long as the action and effect of the present technology are not impaired. Note that the sewing needle 111 is not essential to the sewing needle unit 11 of the sewing machine 1 according to the present technology, and a suitable sewing needle 111 according to the shape, such as the material and thickness, of the sewing object 2 can be freely attached and used during sewing.

[0014] The pressure foot 113 is a member that presses the sewing object 2 placed on the bed B1 of the sewing machine body B toward the bed B1 during sewing to determine the position where the sewing needle 111 will be inserted, and a pressure foot used in a typical sewing machine can be freely selected to suit the shape of the sewing object 2. The pressure foot 113 is attached, for example, to the bottom surface of the head B3 of the sewing machine body B in a state that allows it to rise and fall toward the bed B1, and has at least a bottom portion for pressing the sewing object 2 toward the bed B1. As a shape that has at least a bottom portion, for example, a shape that is generally L-shaped when viewed from the side of the sewing machine (see FIG. 2) or a shape that is generally inverted T-shaped when viewed from the side of the sewing machine (not shown) can be used.

[0015] The pressure foot 113 is attached to the bottom surface of the head B3 of the sewing machine body B, facing the bed B1 and generally parallel to the sewing needle 111. The bottom of the pressure foot 113 is provided with a hole or gap through which the sewing needle 111 passes to allow the sewing needle 111 to move up and down. For example, in this embodiment, the bottom of the pressure foot 113 is bifurcated to provide a gap through which the sewing needle 111 passes, but this is not limiting. For example, although not shown, the bottom of the pressure foot 113 can also be provided with a hole through which the sewing needle 111 passes.

[0016] It is preferable that the two sewing needle units 11 included in the sewing machine 1 according to the present technology are each independently controlled. By making the two sewing needle units 11 independently controllable, it is possible to form a double stitch with high designability even if the shapes (e.g., uneven shapes) of the parts where the left and right stitches are to be formed on the sewing object 2 are different. Furthermore, by making the two sewing needle units 11 independently controllable, it is also possible to design the left and right stitches to have different shapes.

[0017] The two sewing needle units 11 included in the sewing machine 1 according to the present technology may also be configured to be controlled integrally. In this case, a pressure foot 113 may be provided for each of the two sewing needle units 11, or holes or gaps through which the two sewing needles 111 pass may be provided in the bottom of one pressure foot 113. That is, in the sewing machine according to the present technology, each of the two sewing needle units may be provided with one pressure foot, or the two sewing needle units may all be provided with one pressure foot.

[0018] As long as the effects of the present technology are not impaired, any general sewing machine configuration may be freely adopted as the connection configuration of the sewing needle unit 11 to the sewing machine body B. For example, the sewing needle unit 11 may be connected to the bottom portion of the head B3 of the sewing machine body B so that the underside of the bottom of the pressure foot 113 faces the bed B1 of the sewing machine body B.

[0019] (3) Guide portion 12 The sewing machine 1 according to the present technology includes a guide portion 12. Fig. 3 is a schematic cross-sectional front view showing a cross section cut at the guide portion 12 when sewing the sewing object 2 using the sewing machine 1 according to the first embodiment. The guide portion 12 contacts the top surface of the sewing object 2 and functions as a guide during sewing.

[0020] FIG. 4 is a cross-sectional view taken along line A-A in FIG. 3 . The guide portion 12 is characterized by being disposed on a line extending from between the two needle units 11 to the non-sewn side of the sewing object 2 (see the dashed line in FIG. 4 ). More specifically, the guide portion 12 is disposed on a line extending perpendicular to the line connecting the two sewing needles 111 provided on the two needle units 11 (see the dashed line in FIG. 4 ). In conventional sewing machines, a pressure foot for holding the sewing object in place during sewing is often used as a guide during sewing. However, when feeding the sewing object under the pressure foot, the position of the sewing object may deviate from the desired position, or the sewing object may not be fed straight, resulting in the feeding angle or direction being deviating from the desired angle or direction. In contrast, the present technology provides the guide portion 12 on the non-sewn side of the sewing object 2, so that the sewing object 2 can be fed under the pressure foot 113 of the needle unit 11 from the desired position, angle, direction, etc. As a result, the design of the sewing product after sewing can be improved.

[0021] In a sewing machine having two sewing needle units 11, a sewist sews while visually checking the two sewing needle units 11, but if one sewing needle unit 11 is used as a marker while sewing, problems such as the sewing object 2 shifting from the other sewing needle unit 11 may occur. In response to this, in the present technology, a guide unit 12 is provided on a line extending from between the two sewing needle units 11 to the non-sewn side of the sewing object 2 (see the dashed line in Figure 4 ), so that the guide unit 12 can also function as a visual guide. As a result, it is possible to prevent the sewing object 2 from shifting at both sewing needle units 11, and improve the design of the double stitch formed on the sewing object 2.

[0022] Furthermore, in a sewing machine having two sewing needle units 11, there is a problem in that the sewing object 2 is likely to twist (wrinkle) between the two sewing needle units 11 when the sewing object 2 is fed into the pressure foot 113. If the sewing object 2 twists between the two sewing needle units 11, the spacing between the double stitches after sewing will not be constant, which may result in a reduction in design quality. In contrast, the guide unit 12 of the present technology is positioned on a line extending from between the two sewing needle units 11 to the unsewn side of the sewing object 2 (see the dashed line in FIG. 4 ). Therefore, the sewing object 2 between the two sewing needles 111 is straightened by the guide unit 12 before being fed into the pressure foot 113, preventing twisting of the sewing object 2 between the two sewing needle units 11. As a result, the distance between the double stitches formed on the sewing object 2 can be maintained at a desired distance, contributing to improved design quality.

[0023] In the sewing machine 1 according to the first embodiment and the sewing machine 1 according to a second embodiment described below, the guide portion 12 is arranged on a line (see the dashed line in FIG. 4 ) that extends from the "center" of a straight line connecting the two sewing needles 111 provided in the two sewing needle units 11 to the non-sewn side of the sewing object 2, perpendicular to the straight line. However, the present invention is not limited to this. For example, the guide portion 12 may be positioned closer to either the left or right sewing needle unit 11, depending on the shape of the sewing object 2 and the shape of the desired double stitch. The shape of the double stitch can also be changed by computer-controlled changing the left and right positions of the guide portion 12, depending on the shape of the sewing object 2 and the shape of the desired double stitch.

[0024] Furthermore, when using the sewing machine 1 according to the present technology, the sewing object 2 sent under the two sewing needles 111 is controlled to the correct position by the guide section 12, so if the stitch pitch of the two sewing needles 111 is the same, the stitch pitch of the double stitch applied to the sewing object 2 after sewing will also be perfectly matched on the left and right, improving the design.

[0025] The stitch pitches of the two sewing needles 111 do not have to be the same. The stitch pitches of the left and right sewing needles 111 may be set separately depending on the shape of the sewing object 2 and the shape of the desired double stitch. Furthermore, the shape of the double stitch can be changed by changing the stitch pitches of the left and right sewing needles 111 separately by computer control depending on the shape of the sewing object 2 and the shape of the desired double stitch.

[0026] The shape of the guide portion 12 is not limited to the shape of the guide portion 12 of the sewing machine 1 according to the first embodiment shown in FIGS. 1 to 4 , and can be freely designed depending on the shape of the sewing object 2. FIG. 5 is a schematic front view showing a sewing machine 1 according to a second embodiment of the present technology. FIG. 6 is a schematic front cross-sectional view showing a cross section cut at the guide portion 12 when sewing the sewing object 2 using the sewing machine 1 according to the second embodiment. The guide portion 12 may be configured to contact the sewing object 2 at one point (not shown), but may also be configured to contact the sewing object 2 at multiple points, as in the sewing machine 1 according to the first embodiment shown in FIGS. 1 to 4 and the sewing machine 1 according to the second embodiment shown in FIGS. 5 and 6 .

[0027] The first and second embodiments are examples of sewing a sewing object 2 having a main body fabric 21 and piping 22. In the first embodiment, the guide portion 12 contacts the main body fabric 21 of the sewing object 2 at two points (see a1 and a2 in FIG. 3 ) and contacts the piping 22 on its surface (see b in FIG. 3 ), so that the guide portion 12 contacts the sewing object 2 at a total of three points. More specifically, the guide portion 12 in the first embodiment has a substantially rectangular parallelepiped shape, and the surface facing the sewing object 2 contacts the piping 22, and both side surfaces along the sewing direction contact the main body fabric 21.

[0028] In the first embodiment, the surface of the guide portion 12 facing the sewing object 2 (see Fig. 3b) may be flat, but as shown in Fig. 3, it may be a curved surface that is concave toward the sewing object 2. When the guide portion 12 comes into contact with the sewing object 2 with the curved surface that is concave, the contact area with the sewing object 2 that has a convex shape, such as piping 22, increases, which not only improves guiding performance but also makes the fabric feed smoother, contributing to improved workability.

[0029] In the second embodiment, the guide portion 12 contacts the main body fabric 21 of the sewing object 2 at two points (see a1 and a2 in FIG. 6) and the piping 22 at two points (see b1 and b2 in FIG. 6), for a total of four points of contact with the sewing object 2. More specifically, the guide portion 12 in the second embodiment is bifurcated toward the sewing object 2, with both inner sides of the bifurcated portions contacting the piping 22 so as to sandwich it therebetween, and both outer sides of the bifurcated portions contacting the main body fabric 21.

[0030] By configuring the guide portion 12 so that it contacts the sewing object 2 at two or more points, a part of the sewing object 2 (the piping 22 in the second embodiment) is clamped by the guide portion 12, thereby preventing displacement of the sewing object 2 and improving guiding properties. When contacting the sewing object 2 at multiple points, the number of contact points is not particularly limited, and may be, for example, two or more points, preferably three or more points, and more preferably four or more points.

[0031] When the guide portion 12 is configured to contact the sewing object 2 at multiple points, it can also be designed to be changeable in distance between the multiple points where the guide portion 12 and the sewing object 2 contact. For example, the guide portion 12 can be formed from a flexible material, an elastic material, a flexible material, or the like, or can be designed to be openable and closable using a spring, bolt, or the like (not shown). In this way, designing the guide portion 12 so that the distance between the multiple points where the guide portion 12 and the sewing object 2 contact can be changed not only makes it possible to adapt to any shape of sewing object 2, but also contributes to improved guiding properties.

[0032] Furthermore, although not shown, a roller or spherical body can be attached to the contact point of the guide portion 12 with the sewing object 2, and the roller or spherical body can be designed to rotate in accordance with the movement of the sewing object 2. By attaching a rotating body that comes into contact with the top surface of the sewing object 2 in this way and rotates in accordance with its movement, it is possible to prevent the sewing object 2 from getting caught on the guide portion 12 and achieve smooth cloth feeding.

[0033] The material constituting the guide portion 12 can be freely selected from one or more materials that can be used as parts of a general sewing machine, as long as the action and effect of the present technology are not impaired. Examples include rubber, resin, elastomer, metal, etc. Among these, in the present technology, it is preferable that the guide portion 12 be made of rubber and / or elastomer.

[0034] The arrangement of the guide unit 12 is not particularly limited as long as it can contact the top surface of the sewing object 2, and it may be connected to either the sewing machine body B or the sewing needle unit 11. In the present technology, it is preferable to connect the guide unit 12 directly to the sewing machine body B, independently of the sewing needle unit 11. By connecting the guide unit 12 directly to the sewing machine body B rather than to the sewing needle unit 11, the guide unit 12 and the sewing needle unit 11 can be moved independently, which improves guiding performance and makes it easier to apply to sewing objects 2 with complex shapes.

[0035] Furthermore, when the guide portion 12 is directly connected to the sewing machine body B, it is preferable that the guide portion 12 be connected to the sewing machine body B on the non-sewn side of the connection portion between the sewing needle portion 11 and the sewing machine body B (see FIG. 2 ). Specifically, for example, when the sewing needle portion 11 is connected to the bottom surface of the head B3 of the sewing machine body B, it is preferable that the guide portion 12 be connected on the non-sewn side of the connection portion of the bottom surface of the head B3 to which the sewing needle portion 11 is connected, i.e., on the front side as viewed from the front of the sewing machine. Connecting the guide portion 12 to the sewing machine body B on the non-sewn side (the front side as viewed from the front of the sewing machine) can reduce the influence on the movement of the sewing needle portion 11, allowing for more precise sewing. Furthermore, connecting the guide portion 12 to the sewing machine body B on the non-sewn side (the front side as viewed from the front of the sewing machine) can reduce the influence of the sewing needle portion 11 on the movement of the guide portion 12, thereby contributing to further improved guiding performance.

[0036] The guide portion 12 can be connected to the sewing machine body B or the sewing needle portion 11 by, for example, a holding mechanism 13 that holds the guide portion 12. The holding mechanism 13 can be connected to the bottom surface of the head B3 of the sewing machine body B. More preferably, the holding mechanism 13 can be connected to the non-sewn side of the portion of the bottom surface of the head B3 where the sewing needle portion 11 is connected, i.e., on the front side when viewed from the front of the sewing machine. The shape of the holding mechanism 13 for holding the guide portion 12 can also be designed freely as long as it does not impair the functions and effects of the present technology. For example, as in the sewing machine 1 according to the first embodiment shown in FIGS. 1 to 4 , the holding mechanism 13 can be connected to the non-sewn side of the portion of the bottom surface of the head B3 where the sewing needle portion 11 is connected, and can be configured to extend vertically toward the guide portion 12.

[0037] Furthermore, as in the sewing machine 1 according to the second embodiment shown in Figures 5 and 6 and the sewing machine 1 according to the third embodiment shown in Figures 7 and 8, the holding mechanism 13 may be configured to extend obliquely from the bottom surface of the head B3 of the sewing machine body B toward the bed B1 when viewed from the non-sewing side (the front side when viewed from the front of the sewing machine). More specifically, for example, the holding mechanism 13 of the sewing machine 1 according to the second embodiment shown in Figure 5 and the third embodiment shown in Figures 7 and 8 is exemplified. In the second embodiment shown in Figure 5 and the third embodiment shown in Figures 7 and 8, the holding mechanism 13 is connected to the outside (left side in Figure 5) of the portion of the bottom surface of the head B3 of the sewing machine body B to which the sewing needle unit 11 is connected when viewed from the front of the sewing machine.

[0038] The holding mechanism 13 of the second embodiment extends obliquely from the bottom surface of the head B3 of the sewing machine body B toward the guide portion 12 to directly above the guide portion 12, and then extends vertically from directly above the guide portion 12 toward the guide portion 12. That is, the holding mechanism 13 of the second embodiment is a combination of a holding mechanism 13 that extends obliquely from the bottom surface of the head B3 of the sewing machine body B toward the bed portion B1 and a holding mechanism 13 that extends vertically from the bottom surface of the head B3 of the sewing machine body B toward the bed portion B1, when viewed from the non-sewing side (the front side when viewed from the front of the sewing machine).

[0039] 7 and 8 is a holding mechanism 13 having a configuration that extends obliquely from the bottom surface of the head B3 of the sewing machine body B toward the guide portion 12. That is, the holding mechanism 13 of the third embodiment is a holding mechanism 13 having a configuration that extends obliquely from the bottom surface of the head B3 of the sewing machine body B toward the bed portion B1 when viewed from the non-sewing side (the front side when viewed from the front of the sewing machine). Typically, the sewing needle 111 is often installed perpendicularly from the bottom surface of the head B3 of the sewing machine body B toward the bed portion B1. Therefore, by employing a holding mechanism 13 that extends obliquely when viewed from the non-sewing side (the front side when viewed from the front of the sewing machine), the sewing needle 111 and the holding mechanism 13 do not overlap when the sewist visually checks the sewing needle 111, and the field of view can be prevented from being obstructed by the holding mechanism 13, which improves the operability of the sewist and also contributes to improved sewing accuracy.

[0040] The material constituting the holding mechanism 13 can be freely selected from one or more materials that can be used as parts of a general sewing machine, as long as the action and effect of the present technology are not impaired. Examples include rubber, resin, elastomer, metal, etc.

[0041] (4) Sewing Object 2 The sewing machine 1 according to the present technology can sew any type of sewing object 2. For example, a sewing object 2 having a main body fabric 21 and piping 22 can be exemplified. In the present technology, piping refers to a piece of fabric with a portion formed into a pipe shape and sewn into a seam along the edge or style line of clothing, bags, furniture, interior fittings, shoes, hats, etc. The piping 22 that can be used in the present technology may have a string-like or tubular body 23 made of resin, fabric, or the like inserted therein (see FIGS. 3, 6, and 8), or the piping 22 may be hollow, although not shown.

[0042] The specific structure of the piping 22 is not particularly limited. For example, it may be a structure in which a string-like or tubular body 23 made of resin, woven fabric, or the like is inserted into a tubular portion of a partially tubular fabric as needed, a structure in which a string-like or tubular body 23 made of resin, woven fabric, or the like is sandwiched between doubled fabric and the fabric is sewn along the tubular body 23, or a structure in which a string-like or tubular body 23 made of resin, woven fabric, or the like is sandwiched between doubled heat-sealable fabric and the fabric other than the portion sandwiched between the tubular body 23 is heat-sealed. The sewing machine 1 according to the present technology can be suitably used for sewing a fabric having such piping 22 and the main fabric 21.

[0043] When using the sewing machine 1 according to the present technology to sew a sewing object 2 having a main body fabric 21 and piping 22, there is no particular limitation on the position of the piping 22 on the sewing object 2. The sewing machine 1 according to the present technology can be suitably used to sew a sewing object 2 having the main body fabric 21 on both sides of the piping 22.

[0044] 2. Manufacturing Method of Sewing Product The manufacturing method of a sewing product according to the present technology is a method of sewing an object 2 to be sewn using the sewing machine 1 according to the present technology. Details of the sewing machine 1 according to the present technology are as described above, and therefore will not be described here.

[0045] In the manufacturing method according to the present technology, first, a sewing object 2 is prepared. In the manufacturing method according to the present technology, there is no particular limitation on the shape of the sewing object 2. For example, there is a sewing object 2 having a main body fabric 21 and piping 22 as shown in Figures 3, 4, and 6.

[0046] Next, the prepared sewing object 2 is placed below the sewing needle unit 11 of the sewing machine 1, and the guide unit 12 is brought into contact with a predetermined position on the top surface of the sewing object 2. In this state, the pressure foot 113 of the sewing needle unit 11 is lowered to fix the sewing object 2 in place, and the sewing machine 1 is operated to perform sewing.

[0047] For example, when sewing a sewing object 2 having a main body fabric 21 and piping 22 as shown in Figures 3, 4, and 6, sewing can be performed with the guide portion 12 in contact with the piping 22. By performing sewing with the guide portion 12 in contact with the piping 22, double stitches can be formed on both sides of the piping 22, parallel to the piping 22.

[0048] More specifically, a method for manufacturing a sewn product including piping 22 will be described. For example, as shown in Fig. 3 , a sewn product can be manufactured in which a double stitch is formed across the piping 22 by placing main fabric 21 on both sides of the fabric with piping 22, sandwiching the piping 22 between the main fabric 21 and the fabric with piping 22 using two sewing needles 11. Note that in the example shown in Fig. 3 , the main fabric 21 is folded twice, but this is not limiting. Although not shown, it is also possible to use a single-layer main fabric 21 or to overlap multiple different main fabrics 21. Furthermore, the main fabrics 21 placed on both sides of the piping 22 can be made of different fabrics or designed in different shapes.

[0049] 6, by employing a guide portion 12 that contacts the sewing object 2 at multiple points, the guide portion 12 can fully perform its guiding function even if the piping 22 does not protrude from the surface of the main body fabric 21, thereby improving the design of the sewing product.

[0050] Furthermore, although not shown, in the case of a sewing object 2 in which the piping 22 is recessed in the main body fabric 21, the guide portion 12 can fully perform its guide function by performing sewing with part or all of the guide portion 12 immersed in the recess of the piping 22. As a result, the design of the sewing product can be improved.

[0051] The sewn product manufactured using the sewing machine 1 according to the present technology or the manufacturing method according to the present technology has excellent design properties and can therefore be suitably used in applications where appearance is important. For example, the sewn product can be suitably used in vehicle interior parts such as seats, headrests, armrests, footrests, door trims, and vehicle ceilings, furniture such as sofas, chairs, and beds, fabric products such as cushion covers, futon covers, pillow covers, carpets, and rugs, and apparel products such as clothing, hats, and shoes.

[0052] REFERENCE SIGNS LIST 1 sewing machine B sewing machine body B1 bed B2 pillar B3 head B4 arm 11 sewing needle 111 sewing needle 112 needle fixing part 113 pressure foot 12 guide 13 fixing mechanism

Claims

1. The sewing machine includes two sewing needles and a guide portion that contacts the piping from an upper surface of a sewing object having the piping, The guide portion is disposed on a line extending from between the two needle portions to a non-sewn side of the sewing object, The guide portion holds the piping.

2. The sewing machine includes two needle parts and a guide part that contacts the upper surface of the sewing object, The guide portion is disposed on a line extending from between the two needle portions to a non-sewn side of the sewing object, The guide portion is connected to a sewing machine body on a non-sewn side of the sewing object relative to the needle portion.

3. The sewing machine includes two needle parts and a guide part that contacts the upper surface of the sewing object, The guide portion is disposed on a line extending from between the two needle portions to a non-sewn side of the sewing object, A holding mechanism for holding the guide portion is provided, the holding mechanism is connected to the sewing machine body on the non-sewing side of the sewing needle portion, and extends obliquely toward the guide portion up to directly above the guide portion, and then extends vertically from directly above the guide portion toward the guide portion, A sewing machine that satisfies any one of the following (1) to (4). (1) The sewing object has piping, and the guide portion contacts the piping from an upper surface of the sewing object. (2) The guide portion contacts the sewing object at three or more points. (3) The guide portion has a rotating body, and the rotating body comes into contact with the upper surface of the sewing object. (4) The guide portion is made of rubber or elastomer.

4. The sewing machine includes two needle parts and a guide part that contacts the upper surface of the sewing object, The guide portion is disposed on a line extending from between the two needle portions to a non-sewn side of the sewing object, The guide portion is made of rubber or elastomer, The rubber or elastomer is a soft, elastic, or flexible material.

5. The sewing object is sewn using the sewing machine according to any one of claims 1 to 4. A method for manufacturing a sewn product.