WO2013038999A1 - Sewing machine, sewn item and stent graft - Google Patents

Abstract

[Abstract] [Problem] To provide a sewing machine capable of sewing a serpentine zigzag stitch on a cylindrical item to be sewn. [Solution] A sewing machine (1) has: a substantially cylindrical guide member (11) for guiding an item (A) to be sewn; a sewing needle (99) for sewing the cylindrical item (A) to be sewn; a support member (71) for supporting the sewing needle (99) in a substantially perpendicular state; a vertical shuttle (21) for hooking the looped needle thread from the sewing needle (99), and positioned inside the guide member (11) in a manner such that the rotating direction thereof is substantially perpendicular to the axial direction (C) of the guide member (11); a rotating shaft (22) for rotating the vertical shuttle (21); an action means (50) for causing the support member (71) and the rotating shaft (22) to substantially simultaneously move back and forth; and a feed roller (183) for feeding the item (A) to be sewn that is positioned on the guide member (11) in a direction opposite the direction of sewing. The feed roller (183) is attached so as to be movable in the axial direction (D) of a rotatable shaft (173). [Selected figure] Fig. 2

Description

Sewing machines, sewing products and stent grafts

The present invention relates to a sewing machine that attaches a cylindrical sewing product to a substantially cylindrical guide member and performs sewing while rotating the sewing product, and performs sewing by reciprocating a sewing needle to perform main sewing or staggered sewing. And a sewn product and a stent graft in which a reinforcing body is sewn by the sewing machine.

Conventionally, a staggered sewing machine has a needle bar that holds a sewing needle that is pivotably mounted in a pendulum shape with its upper end pivotally attached to the sewing machine body, and a rotational direction that is substantially parallel to the sewing direction. A vertical hook that hooks a needle thread loop of the sewing needle, a rotary shaft that rotates the vertical hook, and an operating means that reciprocates the sewing needle and the vertical hook synchronously (for example, a patent) References 1-4).

Another staggered sewing machine has a needle bar that holds the sewing needle attached to the sewing machine body so that the upper end is pivotally attached to the sewing machine body, and the rotation direction is substantially perpendicular to the sewing direction. And a vertical hook that hooks a loop of the needle thread of the sewing needle and a rotary shaft that rotates the vertical hook (for example, Patent Document 5).

In addition, the sewing machine that performs another staggered stitch has a needle bar that holds the sewing needle attached to the sewing machine body so that the upper end is pivotally attached to the sewing machine body and can swing in a pendulum shape in a direction substantially parallel to the sewing direction. It is provided so as to be substantially parallel to the direction, and includes a vertical hook that hooks the needle thread loop of the sewing needle with a sword tip and a rotary shaft that rotates the vertical hook (for example, Patent Document 6).

A conventional sewing machine that performs zigzag stitching sews the workpiece while the sewing needle swings like a pendulum, so the sewing needle penetrates the workpiece diagonally, and when sewing materials such as thin fabric, sewing is performed smoothly. However, in the case of a thick sewing material such as leather, there is a problem that the sewing needle is bent and difficult to penetrate, and the sewing cannot be performed smoothly. Also, the sewing needle that penetrates when the vertical hook moves to the machine body side penetrates diagonally so that the tip approaches the vertical hook, and conversely, the sewing needle that penetrates when the vertical hook moves away from the sewing machine body is , Penetrate the tip away from the vertical hook. If the sewing needle penetrates obliquely so that the tip approaches the vertical hook, the tip may contact the vertical hook and break. In addition, if the sewing needle penetrates the tip of the sewing machine needle away from the vertical hook, the sword tip of the vertical hook may not catch the upper thread loop formed by the sewing needle. As described above, the conventional sewing machine that performs zigzag stitching has a problem in that the sewing needle may swing in a pendulum shape, so that sewing may not be performed smoothly.

Furthermore, in the case of a vertical hook employed in a conventional sewing machine, provided that the rotational direction is substantially parallel to the sewing direction, and the sword tip hooks the needle thread loop of the sewing needle, The mechanism is complicated and large, and there is a limit on the mechanism for reducing the outer diameter (diameter). Accordingly, in the conventional sewing machine, there is a guide member that guides a large-diameter cylindrical sewing product such as a leg portion of a trouser, but there is no guide member that guides a small-diameter cylindrical sewing product of about 3 cm, for example. It was. Further, there is no structure in which the small-diameter cylindrical workpiece is mounted on a small-diameter cylindrical guide member and a main stitch such as staggered stitching is performed on the small-diameter cylindrical workpiece. Therefore, the only way to sew in the circumferential direction of a small-diameter cylindrical workpiece is by hand-sewing.

In view of the above points, the applicant of the present application can perform zigzag stitching on a small-diameter cylindrical workpiece and reciprocate the sewing needle in a substantially vertical state, so that even a thick sewing material can be sewn smoothly. An application was filed for a sewing machine in which the hook of the vertical hook with respect to the upper thread loop was reliably hooked (Patent Document 7).

Japanese Patent Publication No. 28-3533 Japanese Patent Publication No. 30-7784 Japanese Patent Publication No.31-791 Japanese Utility Model Publication No. 43-15068 Japanese Examined Patent Publication No. 44-8711 Japanese Patent Publication No. 7-28976 JP 2009-291491 A

The sewing machine filed by the applicant of the present application is suitable for performing zigzag stitching linearly in the outer circumferential direction of the cylindrical sewing product, but the feeding means for feeding the cylindrical sewing product is in a direction substantially perpendicular to the feeding direction. It was difficult to perform staggered stitches that could not move and meandered in the outer circumferential direction of the tubular sewing product. In addition, since the presser member that presses the sewing machine work piece of the conventional sewing machine is made of a flat metal plate, when it is going to press down the cylindrical work piece, it will be pressed at a point and may be pressed at the surface. However, there is a problem that it is difficult to securely hold the workpiece when sewing. Further, the conventional sewing machine has a problem in that the sewing machine needle is not provided with a device for guiding the sewing needle in the case of reciprocating movement of the sewing machine needle, and the sewing needle may be tilted to perform sewing. Furthermore, the conventional sewing machine attaches the cylindrical sewing product to the cylindrical guide member and sews the cylindrical sewing product while shifting it to the sewing machine body side. Due to the frictional resistance, there is a problem that the cylindrical sewing product may not be fed smoothly. Furthermore, in the conventional sewing machine, the sewing product is attached to the cylindrical guide member and sewing is performed. However, if the sewing product is larger than the guide member, the sewing product is loosened and the position of the seam is shifted. As a result, the shape of the seam is unsatisfactory, and the sewing thread is loosened and easily unraveled.

The stent graft (sewn product) is composed of a cylindrical main body (graft, sewing object) and a reinforcing body (stent) provided on the peripheral surface of the cylindrical main body to reinforce. The cylindrical main body is made of various composite materials such as polyester and fluorine, and the reinforcing body is made of a material excellent in rebound resilience such as nickel-titanium alloy or stainless steel. Reinforcing bodies are ring-shaped or Z-shaped, and conventionally, a plurality of reinforcing bodies are fixed to the peripheral surface of the cylindrical main body by hand-sewing. There is a problem in that it cannot be sewn, the seam is uneven, the strength is insufficient, it is easy to loosen, skill is required for the sewing work, and labor and time are required. With the sewing machine filed by the present applicant, it becomes possible to manufacture a stent graft (sewn product) by stitching the reinforcing body to the cylindrical body (graft, sewing product) by staggered stitching, the seam is uniform, and the strength is improved. It is difficult to loosen, and it is easy to sew, requires no skill, and can be manufactured in a short period of time. Here, it has been found that it is desirable to form the reinforcing body in a meandering shape instead of a straight line in order to suppress expansion and contraction of the stent graft (sewn product) in the major axis direction. However, the sewing machine filed by the present applicant has not been able to sew a meander-shaped reinforcing body onto a stent graft (sewn product).

The present invention has been devised in view of the above problems, and the cylindrical main body can be moved in a direction substantially perpendicular to the feeding direction, and the meandering is not only linear in the outer peripheral direction of the cylindrical sewing product. It is a first object of the present invention to provide a sewing machine that can perform zigzag stitching. It is a second object of the present invention to provide a sewing machine that can press a cylindrical sewing product mounted on a cylindrical guide member by surface contact and reliably press the sewing product when sewing the sewing product. Furthermore, a third object of the present invention is to provide a sewing machine provided with a device for guiding the sewing needle in the case of reciprocating movement of the sewing needle so that the sewing needle can perform a sewing operation stably. Furthermore, the cylindrical guide member on which the cylindrical sewing product is mounted is provided with a rotatable cylinder so as to be rotatable, and the frictional resistance between the cylindrical sewing product and the guide member is reduced, thereby reducing the cylindrical sewing product. A fourth object is to provide a sewing machine that can smoothly feed the sewing machine. Furthermore, a fifth object of the present invention is to provide a sewing machine that can tension a workpiece and form an accurate and strong seam even when the tubular workpiece is larger than the cylindrical guide member. And In addition, a sixth object of the present invention is to provide a sewn product in which the reinforcing member meandering is beautiful and accurate and is sewn firmly by the sewing machine. Furthermore, a seventh object of the present invention is to provide a stent graft in which the reinforcing member meandering is beautiful and accurate and is sewn firmly by the sewing machine.

In order to achieve the first object, the sewing machine according to claim 1 is a sewing machine that sews a staggered seam on a cylindrical sewing product, and a substantially cylindrical guide member that guides the sewing product. A sewing needle that sews a cylindrical workpiece guided by the guide member, a support member that supports the sewing needle in a substantially vertical state, and a rotational direction that is substantially perpendicular to the axial direction of the guide member. A vertical hook provided in the guide member for hooking a loop of the needle thread of the sewing needle, a rotary shaft for rotating the vertical hook, and the support member and the rotary shaft are reciprocated in the axial direction of the rotary shaft substantially simultaneously. , An operation means for reciprocating the sewing needle and the vertical hook, and a feed means for feeding the sewing object provided on the guide member in the anti-sewing direction. The feed means is attached to the rotation shaft and the rotation shaft. Connected to the sewing object provided on the guide member. A feed roller, an operation unit that can move the feed roller from a position away from the sewing product to a position that contacts the sewing product, and a rotary shaft that rotates intermittently to feed the feeding roller to the sewing product. Drive means for intermittently rotating in the feed direction, and the feed roller is attached so as to be movable in the axial direction of the rotating shaft.

In order to achieve the second object, the sewing machine according to claim 2 of the present application is provided with a pressing mechanism that presses the workpiece, and the pressing mechanism includes a pressing shaft and a pressing plate provided at the lower end of the pressing shaft. And an elastic member which is provided on the lower surface of the pressing plate and presses the workpiece to the circumferential surface side of the guide member.

In order to achieve the third object, the sewing machine according to claim 3 of the present application is characterized in that the pressing plate has a guide surface for guiding the reciprocating motion of the sewing needle.

In the sewing machine according to the fourth aspect of the present invention, in order to achieve the fourth object, the guide member is formed with a long hole through which the sewing needle is inserted on the front side, and a rotating cylinder is provided on the rear side. It is characterized by that.

In order to achieve the fifth object, the sewing machine according to claim 5 of the present invention is provided with a guide shaft extending substantially parallel to the guide member, and the sewing product can be attached to the guide member and the guide shaft. .

A sewn product according to claim 6 of the present invention is a sewn product sewn by the sewing machine to achieve the sixth object, and a cylindrical main body guided by a guide member, and a peripheral surface of the cylindrical main body A feed roller which is in contact with the cylindrical main body by the operating portion in the axial direction of the rotating shaft in accordance with the meandering reinforcing body. While moving, it is intermittently rotated in the feeding direction of the cylindrical main body by the driving means, the cylindrical main body provided on the guide member is fed in the anti-sewing direction, and the sewing needle is put on both sides of the reinforcing body by the operating means. The ring-shaped reinforcing body is sewn on the cylindrical main body by stitching in a staggered manner by reciprocating.

In order to achieve the seventh object, a stent graft according to claim 7 of the present invention is a stent graft that is sewn by the sewing machine, and is provided on a cylindrical main body guided by a guide member, and on a peripheral surface of the cylindrical main body. And a feed roller that is brought into contact with the cylindrical body by the operating portion moves in the axial direction of the rotary shaft in accordance with the meandering reinforcement. However, it is intermittently rotated in the feeding direction of the cylindrical main body by the driving means, the cylindrical main body provided on the guide member is fed in the anti-sewing direction, and the sewing needle is reciprocated on both sides of the reinforcing body by the operating means. The annular reinforcing body is sewn to the cylindrical main body by zigzag stitching.

The sewing machine according to the present invention is a sewing machine that sews a staggered seam on a cylindrical workpiece, and includes a substantially cylindrical guide member that guides the workpiece, and a cylindrical workpiece guided by the guide member. A sewing needle for sewing the sewing product, a support member for supporting the sewing needle in a substantially vertical state, and a needle of the sewing needle provided in the guide member so that the rotation direction is substantially perpendicular to the axial direction of the guide member. A vertical hook for hooking a thread loop, a rotating shaft for rotating the vertical hook, and an operating means for reciprocating the sewing needle and the vertical hook substantially simultaneously with the support member and the rotating shaft in the axial direction of the rotating shaft. And a feeding means for feeding a workpiece to be sewn provided in the guide member in the anti-sewing direction. The feed means includes a pivot shaft, a feed roller attached to the pivot shaft and in contact with the sewing product provided on the guide member, and a position where the feed roller contacts the sewing product from a position away from the sewing product. And a driving means for intermittently rotating the rotation shaft and rotating the feed roller intermittently in the feed direction of the sewing product. The feed roller is attached so as to be movable in the axial direction of the rotation shaft.

In the sewing machine according to the present invention, a cylindrical sewing product is mounted on a substantially cylindrical guide member in a state where the feed roller is separated from the substantially cylindrical guide member, and the feed roller is separated from the sewing product by the operating portion. The position is moved to the position where it comes into contact with the workpiece. When driven, the rotating means of the vertical hook and the supporting member that supports the sewing needle are reciprocated by the operating means, and the sewing needle is reciprocated in the axial direction of the guide member in a substantially vertical state, and the vertical hook is also moved. The cylindrical sewing product guided by the guide member can be sewn by reciprocating in the axial direction of the guide member in a state in which the rotation direction is substantially perpendicular to the axial direction of the guide member. Further, the driving means intermittently rotates the feed roller through the rotation shaft in the feed direction of the sewing product to intermittently feed the sewing product, and the sewing needle is removed from the sewing product. The sewing product is fed so that the sewing product is not sent when the sewing machine needle is inserted into the sewing product, and the sewing product is sewn. As described above, the sewing machine according to the present invention has an effect that it is possible to perform linear zigzag stitching in the circumferential direction of the cylindrical sewing product. Further, there is an effect that meandering zigzag stitching can be performed in the circumferential direction of the cylindrical sewing product by moving the feed roller in the axial direction of the rotation shaft.

The sewing machine according to the present invention reciprocates the sewing needle in a substantially vertical state, so that the sewing needle does not penetrate obliquely with respect to the sewing product as in the prior art, and is substantially the same with respect to the sewing product. Since it penetrates at right angles, there is an effect that even a thick sewing material can be sewn smoothly. In the sewing machine according to the present invention, since the sewing needle and the vertical shuttle reciprocate in the same direction at the same time, the tip of the sewing needle does not approach or separate from the vertical shuttle as in the prior art. The positional relationship between the vertical hook and the vertical hook is constant, and the hook of the vertical hook with respect to the loop of the upper thread can be reliably hooked. Furthermore, since the sewing machine according to the present invention is provided with a feed roller for feeding the workpiece in the counter-sewing direction to the guide member, the workpiece is smoothly rotated in the circumferential direction along the peripheral surface of the guide member. There is an effect that the sewing work can be simplified.

The sewing machine according to the present invention is provided with a pressing mechanism for pressing a sewing product. The pressing mechanism is provided on a pressing shaft, a pressing plate provided at the lower end of the pressing shaft, and a lower surface of the pressing plate, and the sewing product. And an elastic member that presses the guide member toward the peripheral surface side. The sewing machine according to the present invention has an effect that the cylindrical sewing material mounted on the cylindrical guide member can be pressed by the surface contact of the elastic member, and can be surely pressed when sewing the sewing material.

The sewing machine according to the present invention has an effect that the sewing needle can perform a stable sewing operation because the pressing plate has a guide surface for guiding the reciprocating motion of the sewing needle.

In the sewing machine according to the present invention, a long hole through which a sewing needle is inserted is formed on the front side of the guide member, and a rotating cylinder is provided on the rear side of the guide member. There is an effect that the cylindrical sewing product can be smoothly fed by reducing the frictional resistance between the two.

The sewing machine according to the present invention is provided with a guide shaft extending substantially parallel to the guide member, and the workpiece can be attached to the guide member and the guide shaft, so that the cylindrical workpiece is more than the cylindrical guide member. Even if it is large, there is an effect that it is possible to form an accurate and strong seam by tensioning the workpiece by the guide shaft.

A stent graft (sewn product) according to the present invention is a stent graft that is sewn by the sewing machine, and is provided on a cylindrical main body guided by a guide member and a peripheral surface of the cylindrical main body, and is directed in a circumferential direction. It consists of a meandering annular reinforcing body, and the feed roller brought into contact with the stent graft by the operating part is moved intermittently in the feed direction of the cylindrical body by the driving means while moving in the direction of the rotation axis in accordance with the meandering wire. And the cylindrical body provided on the guide member is fed in the anti-sewing direction, and the sewing needle is reciprocated on both sides of the reinforcing body by the operating means, so that the annular reinforcing body is sewn in zigzag stitching. It is sewn to the cylindrical body. The stent graft (sewn product) according to the present invention has an effect that the meandering reinforcing body is beautiful and accurate and is sewn firmly.

It is the whole side view seen from one side showing the embodiment of the sewing machine concerning the invention in this application. It is the whole side view seen from the other side of the sewing machine of FIG. It is side surface sectional drawing of the sewing machine of FIG. It is explanatory drawing explaining the feeder of the sewing machine of FIG. 1, Comprising: (a) is a general view, (b) is the elements on larger scale. It is explanatory drawing explaining the reciprocating operation | movement of a sewing needle. It is explanatory drawing explaining the reciprocation operation | movement of a vertical hook. It is sectional drawing explaining the motive power output part of the sewing machine of FIG. It is sectional drawing explaining the feed mechanism of the sewing machine of FIG. It is principal part explanatory drawing of FIG. 8, Comprising: (a) is an enlarged view of a pressing mechanism, (b) is an enlarged view of a press board. It is sectional drawing explaining the holding | suppressing mechanism of FIG. It is explanatory drawing of the guide shaft of the sewing machine of FIG. It is explanatory drawing of a to-be-sewn material, Comprising: (a) is a perspective view, (b) is a side view. It is explanatory drawing of a stent graft (sewing thing), Comprising: (a) is a perspective view, (b) is a top view, (c) is a front view. It is another explanatory perspective view of a stent graft (sewn product).

The sewing machine 1 sews a staggered seam on the tubular workpiece A. As shown in FIGS. 1 to 3, the sewing machine 1 includes a substantially cylindrical guide member 11 that guides the workpiece A, and a sewing needle 99 that sews the cylindrical workpiece A guided by the guide member 11. A support member 71 that supports the sewing needle 99 in a substantially vertical state, and is provided in the guide member 11 such that the rotational direction is substantially perpendicular to the axial direction C of the guide member 11. The vertical hook 21 for hooking the loop, the rotary shaft 22 for rotating the vertical hook 21, the support member 71 and the rotary shaft 22 are reciprocated substantially simultaneously in the axial direction of the rotary shaft 22, and the sewing needle 99 and the vertical hook 21 are moved. And a feeding means 180 for feeding the workpiece A provided on the guide member 11 in the anti-sewing direction. The feed unit 180 includes a roller mounting shaft 181, a feed roller 183 that is attached to the roller mounting shaft 181 and contacts the sewing product A provided on the guide member 11, and a position where the feeding roller 183 is separated from the sewing product A The operation unit 161 that can be moved from the position to the position to be in contact with the sewing product A and the roller mounting shaft 181 are intermittently rotated, and the feed roller 183 is intermittently rotated in the feeding direction of the sewing product A. Means 111. The feed roller 183 is attached so as to be movable in the axial direction D of the rotation shaft 173.

The sewing machine 1 attaches the cylindrical workpiece A to the substantially cylindrical guide member 11 in a state where the feed roller 183 is separated from the substantially cylindrical guide member 11, and sews the feed roller 183 by the operation portion 161. The position is moved from a position away from the object A to a position in contact with the sewing object A. When driven, the rotating means 22 of the vertical shuttle 21 and the support member 71 that supports the sewing needle 99 are reciprocated by the operating means 50, and accordingly, the sewing needle 99 is in a substantially vertical state in the axial direction C of the guide member 11. The vertical shuttle 21 is reciprocated in the axial direction C of the guide member 11 in a state where the rotation direction of the vertical shuttle 21 is substantially perpendicular to the axial direction C of the guide member 11, and is guided by the guide member 11. Sewing can be performed on the workpiece A. Further, the driving means 111 intermittently rotates the feed roller 183 in the feed direction of the workpiece A via the roller mounting shaft 181 to intermittently feed the workpiece A, and the sewing needle 99 is fed to the workpiece A. The sewing product A is sewed so that the sewing product A is sent while the sewing machine needle 99 is detached from the sewing machine, and the sewing product A is not sent when the sewing needle 99 is inserted into the sewing product A. As described above, the sewing machine 1 can perform the linear zigzag stitch in the circumferential direction of the cylindrical sewing product A. Further, meandering zigzag stitching can be performed in the circumferential direction of the cylindrical sewing product A by moving the feed roller 183 in the axial direction D of the rotation shaft 173.

Since the sewing machine 1 reciprocates the sewing needle 99 while maintaining a substantially vertical state, the sewing needle 99 does not penetrate obliquely with respect to the sewing product A and does not penetrate the sewing product A as in the prior art. Since it penetrates at a substantially right angle, even a thick sewing material can be sewn smoothly. Further, since the sewing machine needle 99 and the vertical hook 21 reciprocate in the same direction at the same time in the sewing machine 1, the tip of the sewing machine needle 99 does not approach or separate from the vertical hook 21 as in the prior art. The positional relationship between the tip of the hook and the vertical hook 21 is constant, and the hook of the vertical hook 21 with respect to the upper thread loop can be reliably hooked. Further, the sewing machine 1 is provided with a feed roller 183 that feeds the sewing product A in the counter-sewing direction to the guide member 11, so that the sewing product A can be smoothly moved in the circumferential direction along the peripheral surface of the guide member 11. The sewing operation can be simplified.

As shown in FIGS. 8 and 9, the sewing machine 1 is provided with a pressing mechanism 100 for pressing the sewing product A. The pressing mechanism 100 includes a pressing shaft 35, a pressing plate 101 provided at the lower end of the pressing shaft 35, and an elastic member 106 that is provided on the lower surface of the pressing plate 101 and presses the workpiece A toward the circumferential surface side of the guide member 11. And have. The sewing machine 1 can hold down the cylindrical sewing product A that is mounted on the cylindrical guide member 11 by the surface contact of the elastic member 106 and can reliably hold down the sewing product A when sewing.

Since the presser plate 101 has the guide surface 109 for guiding the reciprocating motion of the sewing needle 99, the sewing machine needle 99 can perform a stable sewing operation. The sewing machine 1 is formed with a long hole 18 through which the sewing needle 99 is inserted on the front side of the guide member 11, and a rotating cylinder 17 is provided on the rear side of the guide member 11. The frictional resistance between A and the guide member 11 can be reduced, and the workpiece A can be smoothly fed.

The sewing machine 1 is provided with a guide shaft 151 extending substantially parallel to the guide member 11, and the workpiece A can be attached to the guide member 11 and the guide shaft 151, so that the cylindrical workpiece A is a cylindrical guide. Even if it is larger than the member 11, the workpiece A can be tensioned by the guide shaft 151, and an accurate and strong seam can be formed.

As shown in FIG. 13, a stent graft (sewn product) 200 is sewn by the sewing machine 1, and is provided on a cylindrical main body 201 guided by a guide member 11 and a peripheral surface of the cylindrical main body 201. The feed roller 183, which is in contact with the cylindrical main body 201 by the operating portion 161, is configured to rotate along the meandering reinforcement body 202. While moving in the axial direction D, the driving means 111 intermittently rotates in the feeding direction of the cylindrical main body 201 to feed the cylindrical main body 201 provided on the guide member 11 in the anti-sewing direction. The sewing needle 99 is reciprocated on both sides of the reinforcing body 202, and the annular reinforcing body 202 is sewn to the cylindrical main body 201 by staggered stitching. In the stent graft (sewn product) 200, the meandering reinforcing body 202 is beautiful and accurate, and is firmly sewn.

Furthermore, the sewing machine 1 will be described in detail. As shown in FIGS. 1 to 3, the sewing machine body 2 of the sewing machine 1 includes a lower frame 3, a vertical frame 5 erected on the lower frame 3, and an upper frame 6 provided substantially horizontally above the vertical frame 5. And a front frame 7 provided at the front end of the upper frame 6. The sewing machine body 2 is fixedly attached to the base 10. A substantially cylindrical guide member 11 is provided on the front wall 8 of the lower frame 3.

As shown in FIG. 3, the lower frame 3 is provided with a rotation shaft 22 and a lower transmission shaft 25 so as to be rotatable. The front portion of the rotary shaft 22 is inserted through the front wall 8 of the lower frame 3 and protrudes into the guide member 11, and the vertical hook 21 is attached to the front end. In the vertical hook 21, the center of rotation of the vertical hook 21 and the axis of the guide member 11 are substantially coincident with each other, and the rotation direction of the vertical hook 21 is substantially perpendicular to the axial direction C of the guide member 11.

A spline shaft 23 is formed at the rear portion of the rotary shaft 22. The rotary shaft 22 is connected to the lower transmission shaft 25 by inserting the spline shaft 23 into a spline hole 26 formed in the front portion of the lower transmission shaft 25 so as to be slidable in the axial direction. That is, the rotating shaft 22 is movable in the axial direction with respect to the lower transmission shaft 25. The lower transmission shaft 25 has a final bevel gear 27 integrally attached to the rear part.

The guide member 11 includes a guide cylinder main body 13, a fixed guide cylinder 14, and a tip guide cylinder 15. The guide tube body 13 is provided with a flange 12 at one end, and is fixed by fixing the flange 12 to the front wall 8 of the lower frame 3 with screws 12a or the like. The fixed guide cylinder 14 is fitted and fixed to the outside of the front end of the guide cylinder main body 13. The tip guide cylinder 15 is fitted and fixed inside the front end of the fixed guide cylinder 14. A cap 16 that is inclined so as to become thinner toward the distal end side is fitted to the distal end guide cylinder 15.

Further, on the outside of the guide cylinder main body 13, a rotary cylinder 17 is provided so as to be rotatable. The fixed guide cylinder 14, the tip guide cylinder 15, and the rotary cylinder 17 are formed to have substantially the same outer diameter. The vertical hook 21 is arranged at a position in the fixed guide cylinder 14, and a needle insertion hole (long hole) 18 through which the sewing needle 99 is inserted is formed in the fixed guide cylinder 14. . The needle insertion hole 18 is elongated in the axial direction C of the guide member 11 because the sewing needle 99 reciprocates in the axial direction C of the guide member 11.

In the vertical frame 5, a first power shaft 41 and a second power shaft 45 are rotatably provided. The first bevel gear 42 is integrally attached to the lower portion of the first power shaft 41, and the second bevel gear 43 is integrally attached to the upper portion. The first bevel gear 42 meshes with the final bevel gear 27 of the lower transmission shaft 25.

The second power shaft 45 is integrally provided with a lower cam 46 at the lower portion and an upper cam 47 at the upper portion. As shown in FIG. 6, the lower cam 46 is fitted into a fitting hole 53 of a coupling body 52 provided at the rear portion of the coupling shaft 51. A front portion of the connecting shaft 51 is rotatably attached to a holding ring 55 that rotatably holds the rotating shaft 22. The holding ring 55 is sandwiched between a pair of fixed rings 56 and 56 that are fixed to the rotating shaft 22, and is regulated so as not to move on the rotating shaft 22 in the axial direction. A second bevel gear 48 is fixed to the upper end of the second power shaft 45.

The upper frame 6 is provided with a drive shaft 61 and a support shaft 71. The drive shaft 61 has a front portion protruding into the front frame 7, a drive gear 62 is attached to the front end, a fourth bevel gear 63 is attached to the rear portion, and a fifth bevel gear 65 is attached to the rear end. It has been. The fourth bevel gear 63 meshes with the third bevel gear 48 of the second power shaft 45. The fifth bevel gear 65 meshes with the second bevel gear 43 of the first power shaft 41.

The front end of the support shaft 71 protrudes into the front frame 7, and an upper support tube 72 that supports the needle bar 95 in a substantially vertical direction is attached to the front end. A lower support tube 73 is attached to the support shaft 71 in the front frame 7 via a substantially L-shaped connecting member 75. The upper support tube 72 and the lower support tube 73 support the needle bar 95 in a substantially vertical state, and the needle bar 95 is movable in the vertical direction. The support shaft 71 has a connecting shaft 76 attached to the rear portion thereof via a central shaft 77. As shown in FIG. 5, the upper cam 47 is fitted into a fitting hole 79 of a connecting body 78 provided at the rear portion of the connecting shaft 76. The second power shaft 45 and the connecting shafts 51 and 76 constitute an operating means 50 that reciprocates the support shaft 71 and the rotating shaft 22 substantially simultaneously in the axial direction of the rotating shaft 22.

A driven shaft 81 is rotatably provided on the front frame 7. The driven shaft 81 includes a driven gear 82 that meshes with the drive gear 62 at a substantially intermediate position, and a rotating body 83 is fixed to the tip. The rotating body 83 is provided with an eccentric pin 85 that is offset from the center of rotation. One end of the crank arm 91 is rotatably attached to the eccentric pin 85 and the other is rotatably attached to the upper end of the needle bar 95. That is, the crank arm 91 has bearing bosses 92 and 93 formed at both ends. One bearing boss 92 is attached to the eccentric pin 85 of the rotating body 83 so as to be rotatable and movable in the axial direction of the eccentric pin 85. The other bearing boss 93 is attached to a pin 96 formed on the needle bar 95 so as to be rotatable and movable in the axial direction of the pin 96. A sewing needle 99 is detachably attached to the tip of the needle bar 95.

As shown in FIGS. 8 to 10, a pressing shaft 35 that moves up and down by the handle lever 30 is provided in the front frame 7. The pressing shaft 35 is provided with an insertion groove 35a and a fixing screw 35b in which the pressing plate 101 can be mounted at the lower part. In addition, the holding shaft 35 is provided with a guide plate 36 substantially in the middle, and a guide pin 37 is provided on the guide plate 36. A support plate 66 is provided in the front frame 7. A swing member 68 is swingably attached to the support plate 66 via a central shaft 67. The swing member 68 has a first swing arm 68a and a second swing arm 68b. The second swing arm 68b is formed with a guide long hole 69 for guiding the guide pin 37 of the guide plate 36 so as to be slidable.

As shown in FIG. 2, the handle lever 30 is provided on one side of the front frame 7 (the side opposite to the sewing machine operator). In the handle lever 30, the base 31 is fixed to the rotation shaft 33, and the tip 32 rotates around the base 31. A swing piece 34 is fixed to the rotating shaft 33. A link member 38 that is rotatably connected to the first swing arm 68 a of the swing member 68 is attached to the swing piece 34. Accordingly, the handle lever 30 is rotated downward (P direction in FIG. 10) by the rotation shaft 33, the swing piece 34, the link member 38, the first swing arm 68a, the second swing arm 68b, and the guide. The holding shaft 35 is moved upward through the long hole 69, the guide pin 37, and the guide plate 36. The handle lever 30 is rotated upward (Q direction in FIG. 10) by rotating the rotary shaft 33, the swing piece 34, the link member 38, the first swing arm 68a, the second swing arm 68b, and the guide slot. 69, the holding shaft 35 is moved downward via the guide pin 37 and the guide plate 36.

A substantially L-shaped pressing plate 101 is attached to the pressing shaft 35. The pressing plate 101 includes a vertical plate 102 that is inserted into the insertion groove 35 a of the pressing shaft 35 and is fixed by a fixing screw 35 b, and a horizontal plate 103. A guide plate 105 that guides the movement of the sewing needle 99 in the left-right direction is fixed to the tip of the horizontal plate 103 with screws 105a and the like. The guide plate 105 includes a horizontal portion 105b that is fixed by a screw or the like, and a vertical portion 105c that is bent at a substantially right angle at the tip of the horizontal portion 105b. The surface of the vertical portion 105 c of the guide plate 105 forms a guide surface 109 that guides the reciprocating motion of the sewing needle 99.

Further, on the lower surface of the horizontal plate 103 of the presser plate 101, a spring member (elastic member) 106 made of a thin metal plate or the like that abuts the sewing product A and presses the sewing product A against the guide member 11 is provided. ing. The spring member (elastic member) 106 has a tip 107 bent into a substantially U shape, and the tip 107 is sandwiched between the horizontal plate 103 and the guide plate 105 and fixed to the horizontal plate 103. Note that a guide recess 108 is formed at substantially the center of the lower end of the vertical portion 105 c of the guide plate 105.

As shown in FIGS. 2 and 4, a feeding device 110 that feeds the workpiece A attached to the guide member 11 to the one side surface (the side surface opposite to the sewing machine operator) of the sewing machine body 2 in the anti-sewing direction. Is provided. The feeding device 110 includes a power take-out unit 111, a power transmission unit 141, and an operation unit 161. The power take-out part 111 has a mounting plate 112 that is fixed to one side surface of the upper frame 6 with screws or the like. A pair of bearing portions 113 and 114 are formed on the mounting plate 112 so as to face each other, and the upper rotating shaft 115 and the lower rotating shaft 116 are rotatably attached to the bearing portions 113 and 114.

The upper rotating shaft 115 is provided with a rotating body 120 having a swing arm 119 and an upper gear 121. The rotating body 120 is provided with a one-way clutch. The one-way clutch transmits the swing of the swing arm 119 away from the sewing machine body 2 to the upper rotary shaft 115 and the swing of the swing arm 119 in the direction approaching the sewing machine main body 2 to the upper rotary shaft 115. Do not communicate. The upper gear 121 is fixed to the upper rotating shaft 115 and meshes with the lower gear 122 fixed to the lower rotating shaft 116.

The swing arm 119 can be swung by the drive shaft 61. As shown in FIGS. 3 and 7, the swing arm 119 has a long hole 123 formed in the longitudinal direction. An eccentric disc 125 having a disc center position biased is fixed to the drive shaft 61. The eccentric disk 125 and the swing arm 119 are connected by a link member 126. That is, the link member 126 is provided with an outer ring 127 that fits the eccentric disk 125 in a rotatable manner on one side, and an engagement shaft 128 that slidably engages with the long hole 123 of the swing arm 119 on the other side. Is provided. Of course, the engagement shaft 128 may be a bolt.

The swing amount of the swing arm 119 can be adjusted by changing the position of the engagement shaft 128. The position of the engagement shaft 128 can be changed by a handle 130 attached to the rear surface of the sewing machine body 2 (the right surface as viewed from the sewing machine operator). The handle 130 is fixed to a rotary shaft 131 protruding from the rear surface of the sewing machine body 2. A connecting arm 132 is fixed to the rotary shaft 131 in the sewing machine body 2. The connecting arm 132 and the engaging shaft 128 are rotatably connected by a substantially L-shaped connecting member 133. When the handle 130 is rotated downward (counterclockwise), the engaging shaft 128 is separated from the upper rotating shaft 115 (rotating body 120) via the connecting arm 132 and the connecting member 133, so that the swinging arm 119 is swung. The amount of movement becomes smaller. When the handle 130 is rotated in the upward direction (clockwise), the engaging shaft 128 approaches the upper rotating shaft 115 (rotating body 120) via the connecting arm 132 and the connecting member 133. Becomes larger.

As shown in FIGS. 2, 4, and 8, the operating portion 161 has a mounting plate 162 that is fixed to one side surface of the front frame 7 with screws or the like. A fixed frame 166 including a pair of bearing plates 164 and 165 is fixed to the mounting plate 162 via a mounting base 163. A movable frame 170 made up of a pair of bearing plates 167 and 168 is attached to the lower portion of the fixed frame 166 so as to be tiltable. A pair of bearing plates 164 and 165 follower shafts 171 are rotatably attached to the upper portion of the fixed frame 166. The upper part of the movable frame 170 is inserted between the pair of bearing plates 164 and 165, and the intermediate shaft 172 is attached to the pair of bearing plates 164 and 165 and the pair of bearing plates 167 and 168. . The intermediate shaft 172 is fixed to the pair of bearing plates 167 and 168 and is rotatably attached to the pair of bearing plates 164 and 165. A rotating shaft 173 is rotatably attached to a pair of bearing plates 167 and 168 below the movable frame 170.

Pulleys 175, 176, and 177 are attached to the driven shaft 171 between the pair of bearing plates 164 and 165, and the intermediate shaft 172 and the rotating shaft 173 between the pair of bearing plates 167 and 168, and the pulleys 175, 176, and 177 are attached. A belt 178 is wound around the belt. The pulley 175 is fixed to the driven shaft 171, the pulley 176 is rotatably attached to the intermediate shaft 172, and the pulley 177 is fixed to the rotating shaft 173. Accordingly, the rotation of the driven shaft 171 is transmitted to the rotation shaft 173. A roller mounting shaft 181 is attached to the rotation shaft 173. The roller mounting shaft 181 includes a cylindrical mounting body 182 and feed rollers 183 and 183 fixedly mounted on both sides of the mounting body 182, and an engagement pin 185 is embedded in the cylindrical body 182.

The feed roller 183 is made of a soft material having a high frictional resistance such as soft synthetic resin or synthetic rubber. The roller mounting shaft 181 is guided by engaging pins 185 engaged with guide grooves 186 formed in the axial direction D of the rotating shaft 173, rotates together with the rotating shaft 173, and the axial direction D of the rotating shaft 173. Can be moved. A stopper disc 187 is formed at the tip of the rotating shaft 173, and the roller mounting shaft 181 can move in the axial direction until it contacts the stopper disc 187.

The intermediate shaft 172 protrudes from the one bearing plate 164 side, and the center boss 190a of the adjustment lever 190 is fixed to the protrusion as shown in FIG. Accordingly, the movable frame 170 is tilted by the adjustment lever 190. One bearing plate 164 is provided with a spring receiver 191, and an adjustment screw 192 is inserted through the spring receiver 191. The tip of the adjustment screw 192 passes through the adjustment lever 190 and is attached to the spring receiver 191 and the adjustment lever 190 by screwing of the nut 193. A spring 195 is attached to the adjustment screw 192, and the adjustment lever 190 is urged away from the sewing machine body 2, and the feed rollers 183 and 183 are urged toward the guide member 11.

Further, an engagement piece 196 is fixedly attached to the center boss 190a of the adjustment lever 190. As shown in FIG. 9B, an engagement recess 196 a is formed at the tip of the engagement piece 196. The pressing plate 197 is engaged with the engaging piece 196. The pressing plate 197 has an upper portion 197 a rotatably connected to the base 31 side of the handle lever 30, and an engaging step portion 198 that engages with the engaging recess 196 a of the engaging piece 196 is formed on the lower portion 197 b. Yes. The engagement step portion 198 engages while the handle lever 30 is being pushed down.

As shown in FIG. 2, the power transmission unit 141 is a connecting shaft 145 having universal joints 142 and 143 attached to both sides. The power transmission unit 141 connects one universal joint 142 to one end of the lower rotating shaft 116 protruding from the bearing unit 114, and connects the other universal joint 143 to the other end of the driven shaft 171 protruding from the bearing plate 165. . Accordingly, the rotation of the lower rotating shaft 116 is transmitted to the driven shaft 171 via the power transmission unit 141.

As shown in FIG. 3, the sewing machine body 2 is provided with a guide shaft 151 that extends substantially parallel to the guide member 11. The guide shaft 151 is formed to have substantially the same length as the guide member 11, and the base end 151 a is fixed to the tip portion 152 a of the swing arm 152 with a screw or the like. As shown in FIG. 11, the base 152 b of the swing arm 152 is rotatably attached to the base 153. The base 153 is fixedly attached to the front wall 8 of the lower frame 3. Therefore, the guide shaft 151 can adjust the distance from the guide member 11 by swinging the swing arm 152.

The sewing machine 1 has the above configuration and can be used as follows. First, the handle lever 30 provided on one side surface (the side surface opposite to the sewing machine operator) of the front frame 7 is tilted downward (arrow P direction). As shown in FIG. 10, when the handle lever 30 is tilted downward, the rotating shaft 33, the swing piece 34, the link member 38, the first swing arm 68 a, the second swing arm 68 b, and the guide slot 69. The pressing shaft 35 moves upward through the guide pin 37 and the guide plate 36. As a result, the pressing plate 101 moves upward away from the guide member 11. Further, since the handle lever 30 moves downward, as shown in FIG. 8, the engagement step portion 198 of the pressing plate 197 engages with the engagement piece 196 of the adjustment lever 190 and resists the elasticity of the spring 195. The adjustment lever 190 is moved closer to the sewing machine body 2, and the feed rollers 183 and 183 are separated from the guide member 11.

Since the holding plate 101 and the feed rollers 183 and 183 are separated from the cylindrical guide member 11, the cylindrical sewing product A can be easily mounted on the guide member 11. The workpiece A is attached only to the guide member 11, but may be loosened if it is large. If sewing is performed with the workpiece A slackened, the stitch position will shift and the shape of the stitch will deteriorate, and the sewing thread will loosen and become easy to loosen, so it is necessary to sew while the workpiece A is pulled. There is. The sewing machine 1 can eliminate the looseness by simultaneously attaching the workpiece A to the guide member 11 and the guide shaft 151. As described above, since the guide shaft 151 can adjust the distance from the guide member 11 by swinging the swing arm 152, any size sewing object A can be tensioned and sewn. it can.

Next, the handle lever 30 provided on one side surface (the side surface opposite to the sewing machine operator) of the front frame 7 is tilted upward (in the direction indicated by the arrow Q). As shown in FIG. 10, when the handle lever 30 is tilted upward (in the direction of the arrow Q), the rotary shaft 33, the swing piece 34, the link member 38, the first swing arm 68a, and the second swing arm. The holding shaft 35 moves downward through the 68b, the guide long hole 69, the guide pin 37, and the guide plate 36. As a result, the pressing plate 101 approaches the guide member 11 side, the spring member (elastic member) 106 abuts on the sewing object A, and presses the sewing object A against the guide member 11.

Further, since the handle lever 30 moves upward, the engagement step portion 198 of the pressing plate 197 is disengaged from the engagement piece 196 of the adjustment lever 190, and the adjustment lever 190 is separated from the sewing machine body 2 by the elasticity of the spring 195. The feed rollers 183 and 183 approach the guide member 11 and the feed rollers 183 and 183 come into contact with both sides of the sewing machine needle 99 of the sewing product A. When the adjustment lever 190 is directly rotated to the sewing machine body 2 side against the elasticity of the spring 195, the feed rollers 183 and 183 are separated from the workpiece A, and when the adjustment lever 190 is released, the elasticity of the spring 195 The feed rollers 183 and 183 come into contact with the workpiece A. In this manner, the feed rollers 183 and 183 can be separated from the sewing product A by the adjustment lever 190 and the position of the sewing product A can be adjusted.

The first power shaft 41 or the second power shaft 45 is driven by a motor (not shown). For example, when the first power shaft 41 is driven, the drive shaft 61 is rotated via the second bevel gear 43 and the fifth bevel gear 65. When the drive shaft 61 rotates, the eccentric pin 85 rotates through the drive gear 62, the driven gear 82, the driven shaft 81, and the rotating body 83, and the crank arm 91 operates. When the crank arm 91 is actuated, the needle bar 65 reciprocates up and down in a substantially vertical direction via the pin 96 and the sewing needle 99 sews the workpiece A.

When the drive shaft 61 rotates, the eccentric disc 125 of the power take-out portion 111 also rotates at the same time, and the swing arm 119 swings through the outer ring 127, the link member 126, and the engagement shaft 128. The swing of the swing arm 119 in the direction away from the sewing machine body 2 is transmitted to the upper rotary shaft 115 via the one-way clutch of the rotating body 120, and the swing of the swing arm 119 in the direction approaching the sewing machine body 2 is performed. The one-way clutch of the rotating body 120 is not transmitted to the upper rotating shaft 115. The rotation of the upper rotating shaft 115 is transmitted to the lower rotating shaft 116 via the upper gear 121 and the lower gear 122.

2, the rotation of the lower rotating shaft 116 is transmitted to the driven shaft 171 of the operating portion 161 via the universal joint 142, the connecting shaft 145, and the universal joint 143 of the power transmitting portion 141. The rotation of the driven shaft 171 is transmitted to the rotating shaft 173 via the belt 178 and is transmitted to the roller mounting shaft 183. The feed rollers 183 and 183 rotate intermittently in the feed direction, and the workpiece A is fed intermittently. That is, the sewing product A is not sent when the sewing needle 99 is inserted, but is sent when the sewing needle 99 is removed. Since the guide member 11 is provided with the rotary cylinder 17 so as to be rotatable, the workpiece A is smoothly fed by the rotary cylinder 17. The feed amount of the sewing product A can be adjusted by the swing amount of the swing arm 119. As shown in FIG. 7, when the handle 130 attached to the rear surface of the sewing machine body 2 (the right surface when viewed from the sewing machine operator) is rotated, the engagement shaft 128 moves through the connection arm 132 and the connection member 133. The swing amount of the swing arm 119 can be changed.

The power of the first power shaft 41 is transmitted to the lower transmission shaft 25 via the first bevel gear 42 and the final bevel gear 27 to rotate the lower transmission shaft 25. When the lower transmission shaft 25 rotates, the vertical shuttle 21 is rotated through the spline hole 26, the spline shaft 23, and the rotation shaft 22. As the vertical hook 21 rotates, the sword tip hooks the upper thread of the sewing needle 99 to perform the main sewing.

As described above, when the drive shaft 61 rotates, the second power shaft 45 is rotated via the fourth bevel gear 63 and the third bevel gear 48. When the second power shaft 45 rotates, the lower cam 46 also rotates, causing the rotary shaft 22 to reciprocate in the axial direction via the connecting body 52, the connecting shaft 51, and the holding ring 55. Since the vertical hook 21 is integrally attached to the front end of the rotating shaft 22, the vertical hook 21 also reciprocates within the guide member 11. The vertical reciprocating width of the vertical hook 21 is P, and this width P is the sewing width. When the second power shaft 45 is rotated, the upper cam 47 is also rotated as shown in FIG. 4, and the support shaft 71 is reciprocated in the axial direction via the connecting body 78, the connecting shaft 76, and the central shaft 77. . Since the needle bar 95 is held at the front end of the support shaft 71 in a substantially vertical state, the needle bar 95 also reciprocates while maintaining the substantially vertical state. The reciprocating width of the needle bar 95 is P. Thus, since the reciprocating width P of the needle bar 95 and the vertical shuttle 21 is the same, when the second power shaft 45 is driven, the vertical shuttle 21 and the sewing needle 99 simultaneously perform the reciprocating operation while maintaining the same distance.

In the sewing machine 1, while the feed rollers 183 and 183 rotate the workpiece A provided on the guide member 11 in the counter-sewing direction, the sewing needle 99 reciprocates, and the main sewing is performed on the workpiece A with the sewing width P. Perform zigzag stitching S. Since the feed rollers 183 and 183 are disposed on both sides of the sewing needle 99, the workpiece A can be reliably fed when the sewing needle 99 is sewn. A to-be-sewn product A shown in FIG. 12 is obtained by fixing an annular reinforcing member B such as a wire with staggered stitches S. The sewing machine 1 can reduce the outer diameter of the guide member 11 to about 3 cm or less, and can perform staggered stitching S on a thin cylindrical sewing product A that cannot be achieved with a conventional sewing machine.

The stent graft (sewn product) 200 can be sewn by the sewing machine 1 described above. As shown in FIG. 13, a stent graft (sewn product) 200 is provided on a cylindrical main body (sewing product) 201 and a peripheral surface of the cylindrical main body 201, and has an annular reinforcement meandering in a wavy shape in the circumferential direction. It consists of a body 202. The cylindrical main body 201 is made of various composite materials such as polyester and fluorine. The reinforcing body 202 is for reinforcing the cylindrical main body 201, and an elastic material such as nickel-titanium alloy or stainless steel is used. The reason why the reinforcing body 202 meanders in a wavy shape instead of a linear shape as shown in FIG. 12 is to suppress expansion and contraction of the stent graft 202 in the major axis direction. In addition, even if it is the reinforcement body 203 arrange | positioned in zigzag shape as shown in FIG. 14, it can sew on the cylindrical main body 201 with the sewing machine of this invention.

The cylindrical main body (sewing object) 201 is mounted so as to be guided by the guide member 11. The handle lever 30 provided on one side surface of the front frame 7 is tilted upward (in the direction indicated by the arrow Q), and the spring member (elastic member) 106 of the pressing plate 101 is brought into contact with the cylindrical main body 201 to form a cylindrical shape. The main body 201 is pressed against the guide member 11. At this time, the reinforcing body 202 is placed in the guide recess 108 of the guide plate 105.

Further, since the handle lever 30 moves upward, the feed rollers 183 and 183 come into contact with the cylindrical main body 201. When a motor (not shown) is driven, the sewing needle 99 moves up and down in a substantially vertical direction, the vertical shuttle 21 rotates, and the sword tip hooks the upper thread of the sewing needle 99 to perform the main sewing of the cylindrical main body 201. The feed rollers 183 and 183 are intermittently rotated in the feed direction to feed the cylindrical body 201 intermittently.

As described above, since the reinforcing body 202 meanders in a wavy shape instead of a linear shape, the cylindrical main body 201 must be moved in the axial direction of the guide member 11. This axial movement can be reliably and easily moved because the reinforcing body 202 is guided into the guide recess 108 of the guide plate 105 as described above. Since the sewing needle 99 is guided to the guide surface 109 of the guide plate 105, the sewing needle 99 can be accurately sewn without tilting. As the guide member 11 of the cylindrical main body 201 moves in the axial direction, the feed rollers 183 and 183 also follow the cylindrical main body 201 and move in the axial direction. When the feed rollers 183 and 183 do not follow, it becomes difficult to move the cylindrical main body 201 sandwiched between the feed rollers 183 and 183 and the guide member 11, and the staggered stitches of the reinforcing body 202 meandering in a wave shape can be performed. Can not. The sewing machine 1 can perform zigzag stitching of the reinforcing body 202 meandering in a wave shape because the feed rollers 183 and 183 can move along with the axial movement of the cylindrical main body (sewing object) 201. In this way, the cylindrical main body 201 provided on the guide member 11 is fed in the anti-sewing direction, and the operating needle 50 causes the sewing machine needle 99 to reciprocate on both sides of the reinforcing body 202 so that the annular reinforcing body 202 is It is sewn on the cylindrical main body 201 by zigzag stitching.

The stent graft (sewn product) 200 sewn by the sewing machine 1 has a uniform seam and sufficient strength of the seam compared to a stent graft in which the reinforcing bodies 202 and 203 are sewn to the tubular body (sewn product) 201 by hand stitching. It is easy to prepare and is easy to sew, and it is easy to sew.

The present invention can be used for a sewing machine for sewing a thin cylindrical sewing product and a stent graft to be sewn by the sewing machine.

A sewing object (stent graft), B annular member, C axial direction, D axial direction, P sewing width, S staggered stitching, X anti-sewing direction (feeding direction), Y sewing direction (reverse feeding direction), 1 sewing machine, 2 Sewing machine body, 3 lower frame, 5 vertical frame, 6 upper frame, 7 front frame, 8 front wall, 10 base, 11 guide member, 12 flange, 12a screw, 13 guide cylinder body, 14 fixed guide cylinder, 15 Tip guide cylinder, 16 cap, 17 rotating cylinder, 18 needle insertion hole (long hole), 21 vertical hook, 22 rotating shaft, 23 spline shaft, 25 lower transmission shaft, 26 spline hole, 27 final bevel gear, 29 gear, 30 handle lever, 31 base, 32 tip, 33 rotating shaft, 34 rocking piece, 35 pressing shaft, 35a insertion groove 35b fixing screw, 36 guide plate, 37 guide pin, 38 link member, 41 first power shaft, 42 first bevel gear, 43 second bevel gear, 45 second power shaft, 46 lower cam, 47 upper Cam, 48 third bevel gear, 50 operating means, 51 connecting shaft, 52 connecting body, 53 fitting hole, 55 retaining ring, 56 fixed ring, 61 driving shaft, 62 driving gear, 63 fourth bevel gear, 65 5th bevel gear, 66 support plate, 67 central axis, 68 swing member, 68a first swing arm, 68b second swing arm, 69 guide slot, 71 support shaft (support member), 72 above Support pipe, 73 lower support pipe, 75 connecting member, 76 connecting shaft, 77 central shaft, 78 connecting body, 79 fitting hole, 81 driven shaft, 82 driven gear, 83 rotating body, 85 bias Pin, 91 crank arm, 92 bearing boss, 93 bearing boss, 95 needle bar, 96 pin, 99 sewing needle, 100 presser mechanism, 101 presser plate, 102 vertical plate, 103 horizontal plate, 105 guide plate, 105a screw, 106 elastic Member (spring member), 107 tip, 108 guide recess, 109 guide surface, 110 feeding device, 111 power output part (drive means), 112 mounting plate, 113 bearing part, 114 bearing part, 115 upper rotating shaft, 116 lower rotating Shaft, 119 Swing arm, 120 Rotating body, 121 Upper gear, 122 Lower gear, 123 Long hole, 125 Eccentric disc, 126 Link member, 127 Outer ring, 128 Engagement shaft, 130 Handle, 131 Rotating shaft, 132 Connecting arm 133 connecting member 141 power transmission part 1 42 universal joint, 143 universal joint, 145 connecting shaft, 151 guide shaft, 151a base end, 152 swing arm, 152a tip, 152b base, 153 base, 161 operating section, 162 mounting plate, 163 mounting base, 164 bearing Plate, 165 bearing plate, 166 fixed frame, 167 bearing plate, 168 bearing plate, 170 movable frame, 171 driven shaft, 172 intermediate shaft, 173 rotating shaft, 175 pulley, 176 pulley, 177 pulley, 178 belt, 180 feeding means , 181 roller mounting shaft, 182 mounting body, 183 feed roller, 185 engagement pin, 186 guide groove, 187 stopper disc, 190 adjustment lever, 190a center boss, 191 spring support, 192 adjustment screw, 193 nut, 195 Spring, 196 engagement piece, 196a engagement recess, 197 press plate, 197a upper part, 197b lower part, 198 engagement step part, 200 stent graft (sewing product), 201 cylindrical body (sewing product), 202 reinforcement body, 203 Reinforcement

Claims (7)

A sewing machine that sews staggered seams on a tubular workpiece,
A substantially cylindrical guide member for guiding the workpiece;
A sewing needle for sewing a cylindrical workpiece to be guided by the guide member;
A support member that supports the sewing needle in a substantially vertical state;
A vertical hook that is provided in the guide member so that the rotation direction is substantially perpendicular to the axial direction of the guide member, and hooks a loop of the needle thread of the sewing needle;
A rotating shaft that rotates the vertical hook;
Operating means for reciprocating the support member and the rotary shaft substantially simultaneously in the axial direction of the rotary shaft, and reciprocating the sewing needle and the vertical shuttle;
A feeding means for sending the workpiece to be sewn provided in the guide member in the anti-sewing direction;
The feeding means is
A pivot axis;
A feed roller attached to the rotating shaft and in contact with the sewing product provided on the guide member;
An operation unit capable of moving the feed roller from a position away from the sewing object to a position in contact with the sewing object;
Drive means for intermittently rotating the rotation shaft and intermittently rotating the feed roller in the feed direction of the sewing product;
The sewing machine is characterized in that the feed roller is attached so as to be movable in the axial direction of the rotation shaft. Equipped with a presser mechanism to hold the workpiece
The holding mechanism is
A holding shaft,
A holding plate provided at the lower end of the holding shaft;
An elastic member that is provided on the lower surface of the pressing plate and presses the workpiece to the circumferential surface side of the guide member;
The sewing machine according to claim 1, comprising: 3. The sewing machine according to claim 2, wherein the pressing plate has a guide surface for guiding the reciprocating motion of the sewing needle. The sewing machine according to claim 1, 2 or 3, wherein the guide member is formed with a long hole through which a sewing needle is inserted on the front side, and a rotating cylinder is provided on the rear side. The sewing machine according to any one of claims 1 to 5, wherein a guide shaft extending substantially parallel to the guide member is provided, and the workpiece can be attached to the guide member and the guide shaft. A sewn product sewn by the sewing machine according to any one of claims 1 to 5,
A cylindrical body guided by a guide member;
It is provided on the peripheral surface of the cylindrical main body, and consists of an annular reinforcing body that meanders in the circumferential direction,
The feed roller brought into contact with the cylindrical main body by the operating portion rotates intermittently in the feed direction of the cylindrical main body by the driving means while moving in the axial direction of the rotary shaft in accordance with the meandering reinforcing body. The cylindrical body provided on the guide member is sent in the anti-sewing direction, and the sewing needle is reciprocated on both sides of the reinforcing body by the operating means.
A sewn product, wherein the annular reinforcing body is sewn to a cylindrical main body by staggered stitching. A stent graft that is sewn by the sewing machine according to any one of claims 1 to 5,
A cylindrical body guided by a guide member;
It is provided on the peripheral surface of the cylindrical main body, and consists of an annular reinforcing body that meanders in the circumferential direction,
The feed roller brought into contact with the cylindrical main body by the operating portion rotates intermittently in the feed direction of the cylindrical main body by the driving means while moving in the axial direction of the rotary shaft in accordance with the meandering reinforcing body. The cylindrical body provided on the guide member is sent in the anti-sewing direction, and the sewing needle is reciprocated on both sides of the reinforcing body by the operating means.
A stent graft, wherein the annular reinforcing body is sewn to a cylindrical main body by staggered stitching.

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