JP2006271525A - Wiper device of sewing machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a wiper device of a sewing machine which securely holds the end of a needle thread after thread wiping by a simple mechanism. <P>SOLUTION: A wiper member 16 is pivoted at an embroidery presser 14 so as to be oscillated between an operation position and a non-operation position for thread wiping. The wiper member returns from the operation position for the thread wiping to a standby position so as to hold the end of the needle thread between a frictional resistance-imparting member 29 fixed on the lower surface of a thread engagement portion 27 provided at the end of a wiper member 16 and the upper surface of a cloth presser foot 13 for pressing a workpiece W. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a sewing machine configured such that after a needle thread is wiped off with a wiper member after the end of sewing, a thread end portion of the needle thread that is wiped off is held by cooperation of the wiper member and the presser foot part. The present invention relates to a wiper device.

  Conventionally, in a embroidery sewing machine, a presser mechanism that drives a presser member that presses a work cloth during embroidery sewing, a thread cutting device that cuts the thread end of an upper thread connected to a sewing needle when sewing is completed, The one provided with a thread wiper mechanism that wipes off the end of the cut upper thread with a wiper member has been put to practical use.

For example, a wiper device for a sewing machine disclosed in Patent Document 1 includes a wiper body that is rotatably supported by a sewing machine frame, a presser that presses a work cloth, a lifting and lowering means that interlocks with the lifting and lowering movement of the presser, An upper end and a connection ring connected to the upper end of the lifting means; The elevating means comprises a support bar loosely fitted in a through hole formed in the presser foot and having a locking body larger than the through hole at the lower end, and a spring body supported by the support bar so as to insert the support bar. .
After the end of sewing, when the lifting means rises in conjunction with the upward movement of the presser foot, the wiper body moves in the direction of the sewing needle via the connecting link, and the thread end of the upper thread cut by the thread cutting means of the sewing machine Pay up.

Furthermore, in the yarn wiping device of Patent Document 2, a thread cutting device that automatically cuts the upper thread and the lower thread near the lower surface of the needle plate of the bed portion of the sewing machine, the sewing machine head above the sewing machine bed portion, A thread wiper is provided that pulls up the upper thread connected to the sewing needle onto the needle plate and pulls out the thread end of the upper thread from the work cloth after being cut by the thread cutting device.
This yarn wiping device includes a wiper having a hook at the tip so that the upper thread can be pulled out of the work cloth, a wiper driving mechanism that drives the wiper, and an upper thread that holds the thread end of the upper thread in the wiper. Holding tool.
When the needle bar and the presser foot are moved up after sewing, the wiper is actuated by the wiper drive mechanism, and the upper end of the upper thread after the thread is cut by the thread cutting device is hooked on the upper part of the work cloth. Pull out and hold the end of the upper thread with the upper thread holder.
Japanese Utility Model Publication No. 6-52782 JP 2003-103080 A

  In the sewing machine wiper device of Patent Document 1, the yarn end of the upper yarn cut by the yarn cutting means is simply pulled out to the upper side of the work cloth by the wiper member. Since it is not held, it is easy to cause thread twist at the end of the thread. For this reason, there is a problem that the stitch at the beginning of the next sewing cannot be performed normally or the stitch at the beginning of the next sewing is disturbed and cannot be cleaned. There is a fear.

  In the yarn wiping device disclosed in Patent Document 2, the yarn end of the upper yarn is lifted by the wiper and the yarn end portion of the upper yarn is held by the upper yarn holder, but the yarn cutting device is moved by the wiper driving mechanism. Since the wiper is driven and controlled in synchronism with the thread cutting operation of the blade, the configuration is complicated and the apparatus is large and expensive.

  An object of the present invention is to provide a wiper device for a sewing machine that securely holds a yarn end portion of an upper yarn after yarn wiping with a simple mechanism.

  The wiper device for a sewing machine according to claim 1 is attached to an embroidery presser having a cloth presser part into which a sewing needle can be inserted, and after the upper thread extending from the stitch hole of the sewing needle is cut by the thread cutting means, the thread end part of the upper thread is processed. In the wiper device provided with a wiper member that wipes the yarn so as to be drawn out to the upper side of the cloth, the yarn end portion of the upper thread is held by the cooperation of the cloth presser portion and the wiper member.

  This wiper device operates after the wiper member is actuated after the cross thread connecting the plurality of embroidery areas during embroidery sewing is cut by the thread cutting means, the upper thread is cut at the time of changing the embroidery thread color and after the end of sewing. The thread is wiped so that the thread end of the thread is pulled out to the upper surface side of the work cloth. After the thread is wiped, the end of the upper thread that has been wiped off is securely held by the cooperation of the wiper member that has been wiped off and the presser foot, so that the stitches at the beginning of the next sewing are formed normally. .

  A wiper device for a sewing machine according to a second aspect of the present invention is the wiper device according to the first aspect, wherein the wiper member has a thread engaging portion that holds the yarn end portion of the upper thread while sandwiching it with the presser foot portion.

  A wiper device for a sewing machine according to a third aspect is the invention according to the second aspect, wherein the wiper member is pivotally supported by the embroidery presser so as to be swingable over a working position for performing thread wiper and a standby position for non-working. By returning from the operating position to the standby position, the yarn end portion of the upper thread is sandwiched and held between the presser foot portion and the yarn engaging portion.

  According to a fourth aspect of the invention, the wiper device for a sewing machine imparts frictional resistance to the yarn end portion of the upper yarn that is held in at least one of the presser foot portion and the yarn engaging portion. A frictional resistance imparting member is provided.

  According to a fifth aspect of the present invention, there is provided a wiper device for a sewing machine according to the fourth aspect of the invention, wherein the frictional resistance applying member is fixed to the lower surface portion of the yarn engaging portion, and the upper thread yarn is formed by the frictional resistance applying member and the upper surface portion of the presser foot portion. The end portion is sandwiched and held.

A wiper device for a sewing machine according to a sixth aspect is the invention according to the fourth or fifth aspect, wherein the frictional resistance imparting member is constituted by a pile member in which short fibers are planted on a base fabric.
The wiper device for a sewing machine according to a seventh aspect is the invention according to any one of the second to fourth aspects, wherein the shape of the presser foot portion and the thread engaging portion in plan view are substantially the same.

  A wiper device for a sewing machine according to an eighth aspect is the invention according to any one of the second to fourth or seventh aspects, wherein the presser foot portion and the thread engaging portion are formed with a through hole through which a sewing needle can pass. is there.

  According to the first aspect of the present invention, the wiper member for wiping the yarn is provided, and the yarn end portion of the upper yarn is held by the cooperation of the presser portion and the wiper member. By securely holding the stitches, the stitches at the beginning of the next sewing are normally formed, and the quality of the sewn product can be improved. Furthermore, since the configuration is simple, the apparatus can be miniaturized and the manufacturing cost can be reduced.

  According to the invention of claim 2, since the wiper member has the thread engaging portion that holds the yarn end portion of the upper thread while sandwiching it with the presser foot portion, the configuration for holding the yarn end portion of the upper yarn is simplified. it can.

  According to the invention of claim 3, it is pivotally supported by the embroidery presser so as to be able to swing over the working position where the thread is wiped and the standby position when not working, and the return from the working position to the standby position. Accordingly, the yarn end portion of the upper thread is sandwiched and held between the cloth presser portion and the yarn engaging portion, so that the yarn end portion can be clamped using the operation of the wiper member moving backward. Therefore, the yarn end portion of the upper yarn can be held with a simple configuration.

  According to the invention of claim 4, since at least one of the presser foot part and the thread engaging part is provided with the friction resistance imparting member that imparts friction resistance to the thread end part of the upper thread being held, The end portion of the upper thread can be more reliably held by the frictional resistance applied from the frictional resistance applying member.

  According to the invention of claim 5, since the frictional resistance imparting member is fixed to the lower surface portion of the yarn engaging portion, when the wiper member moves forward from the standby position to the operating position and wipes the yarn, the yarn end of the upper yarn When the portion comes into contact with the frictional resistance applying member and the frictional resistance is applied, it is possible to prevent the yarn end portion of the upper thread from dropping from the yarn engaging portion. In addition, since the upper end portion of the upper thread is sandwiched and held between the frictional resistance applying member and the upper surface portion of the presser foot, the configuration for holding the upper end portion of the upper thread can be saved. it can.

According to the invention of claim 6, since the frictional resistance imparting member is constituted by a pile member in which short fibers are planted on the base fabric, it can be manufactured with a simple member at low cost.
According to the invention of claim 7, since the shape of the presser foot portion and the yarn engaging portion in plan view are substantially the same shape, the yarn end portion can be more securely held and held.
According to the eighth aspect of the present invention, since the presser foot and the thread engaging portion are formed with through holes through which the sewing needle can pass, the thread end portion of the upper thread is formed in the through hole of the thread engaging portion. It is clamped in the inserted state, and the yarn end portion of the upper yarn can be held more reliably.

  The wiper device for a sewing machine according to the present invention is attached to an embroidery presser having a presser foot part through which a sewing needle can be inserted, and after the upper thread extending from the stitch hole of the sewing needle is cut by the thread cutting means, the thread end part of the upper thread is processed. In a wiper device having a wiper member that wipes the yarn so as to be pulled out to the upper side of the cloth, the yarn end portion of the upper thread is held by the cooperation of the cloth presser portion and the wiper member.

Embodiments of the present invention will be described below with reference to the drawings.
First, as shown in FIG. 1, a sewing machine M capable of embroidery sewing will be briefly described.
This sewing machine M is the same as an ordinary electronic control sewing machine for home use, and faces the bed 1 from the bed 1 and the upper end of the pedestal 2 that is erected from the right end of the bed 1. It has the arm part 3 extended to the left. In this sewing machine M, an embroidery frame drive mechanism 4 for embroidery sewing using an embroidery frame (not shown) is detachably mounted on the left end portion of the bed portion 1. The embroidery frame drive mechanism 4 drives the embroidery frame independently in the X direction (left-right direction) and Y direction (front-back direction).

  On the lower side of the needle plate 1a of the bed portion 1, similarly to a general sewing machine, a feed dog vertical movement mechanism (not shown) for moving the feed dog up and down, and a feed dog longitudinal movement mechanism (not shown) for moving back and forth are provided. A hook mechanism (not shown) for detachably mounting a bobbin around which a lower thread is wound, a thread cutting mechanism (not shown) for cutting an upper thread and a lower thread, and the like are provided. A liquid crystal display 6 is provided on the front surface of the pedestal 2.

  The arm portion 3 includes a sewing machine main shaft (not shown) that is driven to rotate by a sewing machine motor, a hand pulley 7 that can manually rotate the main shaft, and a needle bar 8 that has a sewing needle 5 attached to the lower end. A needle bar drive mechanism (not shown) to be moved, a needle swinging mechanism 9 for swinging the needle bar 8 in the left-right direction perpendicular to the cloth feed direction, and a balance for moving the scale up and down by adjusting the vertical movement of the needle bar. A driving mechanism (not shown) and a lifting mechanism (not shown) that drives the presser bar 10 supported by the sewing machine frame so as to be lifted up and down by the stepping motor fixed to the sewing machine frame between the raised position and the lowered position. ) Etc. are provided.

  A sewing start / stop switch 11 and the like for starting and stopping sewing are provided on the front side of the arm portion 3. In the head portion of the arm portion 3, an embroidery presser 14 having a presser foot 13 is attached to the presser bar 10, and a through hole 12 through which the sewing needle 5 can penetrate in the vertical direction is formed in the presser foot 13. . The embroidery presser 14 is threaded so that the upper thread is threaded by the lower thread cutting mechanism of the needle plate 1a and the thread end of the upper thread extending from the eye hole of the sewing needle 5 is pulled out to the upper side of the work cloth. A wiper device 15 for paying is provided. The embroidery presser 14 and the wiper device 15 are provided with a support member 20, a support shaft 21, a driving force input mechanism 22, and the like which will be described later.

Next, the wiper device 15 will be described.
As shown in FIGS. 2 to 9 and 13, the wiper device 15 includes a wiper mechanism 17 including a wiper member 16 that performs thread wipe, and a wiper drive mechanism 18 that drives the wiper mechanism 17 to cause the wiper member 16 to perform thread wipe operation. And a switching mechanism 19 that switches the wiper member 16 between an operable state and an inoperable state in conjunction with the position of the needle bar 8.

Next, the wiper mechanism 17 and the wiper member 16 will be described with reference to FIGS. The wiper mechanism 17 includes a wiper member 16 and a link mechanism 23.
The wiper member 16 is pivotally supported by the main body member 24 of the driving force input mechanism 22 of the embroidery presser 14 so as to be swingable about a horizontal pivot shaft 25 parallel to the needle swinging direction (left-right direction). The detour arm portion 26 and a thread engaging portion 27 formed integrally with the lower end portion of the detour arm portion 26 are provided.

The detour arm portion 26 is configured to detour so as not to interfere with the needle stopper member 30 that fixes the sewing needle 5 to the needle bar 8 when the wiper member 16 swings upward to perform thread wiping.
The thread engaging portion 27 is provided at the distal end portion of the wiper member 16 and is formed in substantially the same shape as the cloth presser portion 13 in a plan view. Inside the thread engaging portion 27, there is provided a wide, substantially elliptical through hole 28 through which the sewing needle 5 can penetrate in the vertical direction and the needle can swing in the horizontal direction. In this embodiment, the shape of the through hole 28 is the same as that of the through hole 12 of the presser foot 13. A frictional resistance imparting member 29 described later is fixed to the lower surface portion of the yarn engaging portion 27 over the entire circumference of the lower surface portion of the yarn engaging portion 27.

The support member 20 is formed integrally with the presser foot 13 attached to the presser bar 10, and a support shaft 21 is fixed to a pair of upper and lower support pieces 20a and 20b of the support member 20 in the vertical direction. Has been.
The driving force input mechanism 22 includes a main body member 24 supported by the support shaft 21 so as to be movable up and down, and an abutting member 31 pivotally attached to the upper end portion of the main body member 24 so as to be swingable in the left-right direction. A contact portion 31 a is formed at the upper end of the contact member 31.

  The body member 24 is formed with a pair of upper and lower guided portions 24a and 24b, and the support shaft 21 is inserted between the upper and lower pair of supporting pieces 20a and 20b so as to be slidable in the vertical direction. The support shaft 21 is inserted into the guided portion 24a at the upper end so as to be slidable in the vertical direction above the upper support piece 20a, and the main body member 24 is supported by the support shaft 21 so as to be slidable in the vertical direction. An elastic member 32 made of a compression coil spring is externally mounted on the support shaft 21 between the support piece 20a and the guided portion 24a at the upper end, and the driving force input mechanism 22 is urged upward by the elastic member 32.

  A pair of front and rear support pieces 24c are formed on the upper end portion of the main body member 24 so as to protrude rightward when viewed from the front, and a horizontal support shaft 33 is fixed to the front and rear direction when viewed from the front. The contact member 31 is supported so as to be swingable with respect to the horizontal support shaft 33 and not movable in the axial direction. Further, the contact member 31 is biased counterclockwise in a front view by the elastic force of the torsion coil spring 34 mounted on the horizontal support shaft 33 and is supported in a posture locked to the main body member 24. Yes. The contact member 31 can swing about 30 degrees in the clockwise direction from the locked position.

Next, the link mechanism 23 will be described.
As shown in FIGS. 4, 5, 8, and 13, the link mechanism 23 includes a drive pin 35 that is implanted in a substantially middle step in the vertical direction of the support shaft 21 in a direction parallel to the needle swing direction, and a main body. The member 24 includes a slit 36 that is cut long in the vertical direction, and a link arm portion 37 that is integrally formed with the wiper member 16, and a link slit 37 a that is formed in the link arm portion 37. The drive pin 35 is slidably inserted into both the slit 36 and the link slit 37a.

  When the main body member 24 is moved downward in a state where the vertical position of the support member 20 attached to the presser bar 10 is fixed, the position of the horizontal pivot shaft 25 fixed to the main body member 24 is moved to the drive pin 35. On the other hand, it moves relatively downward. As a result, the link slit 37a of the wiper member 16 moves from the posture extending obliquely downward toward the front as shown in FIGS. 4 and 13 to the posture extending obliquely upward toward the front as shown in FIGS. Therefore, as shown in FIGS. 4 and 13, the position where the thread engaging portion 27 of the wiper member 16 approaches and opposes the upper side of the cloth presser portion 13 from above (corresponding to the standby position when the wiper member is not in operation). 8 and FIG. 15, it moves until it reaches the front of the needle stop member 30.

  Next, the wiper drive mechanism 18 that drives the wiper member 16 by the lifting and lowering operation of the presser bar 10 will be described. The wiper drive mechanism 18 is configured to be driven by an elevating mechanism that drives the presser bar 10 up and down. The lower end part of the embroidery presser 14 is fixed to the lower end part of the presser bar 10 by a fastening screw 38. The support member 20 formed integrally with the embroidery presser 14 by the lifting operation also moves up and down.

  When the contact portion 31a of the contact member 31 is in a position where it can contact a later-described needle bar base 39, the support member 20 rises with the rise of the presser bar 10, and the contact portion 31a becomes the needle bar base 39. Abut. After the contact portion 31a contacts the needle bar base 39, the contact portion 31a is locked at that position. When the support member 20 is further lifted together with the presser bar 10, the position of the horizontal pivot shaft 25 fixed to the main body member 24 as described above moves downward relative to the drive pin 35, whereby the wiper member As shown in FIG. 4 and FIG. 13, when the wiper member 16 is rotated from a standby position when the wiper member 16 is not operated to a position reaching the front of the needle stop member 30 as shown in FIGS. The work cloth W is held in a state where the yarn end portion of the cut upper yarn is held inside the through hole 28 of the yarn engaging portion 27 via the frictional resistance applying member 29 fixed to the lower surface of the yarn engaging portion 27. The yarn is wiped out so as to be pulled out to the upper surface side.

Next, the switching mechanism 19 will be described.
As shown in FIGS. 3 and 5, the switching mechanism 19 includes a needle swing mechanism 9 and a needle bar base 39 that supports the needle bar 8 to be slidable in the vertical direction.

A needle swing mechanism 9 that swings the needle bar 8 will be described.
10 to 12, the needle swing mechanism 9 includes a needle bar base 39, a swing lever 40, a stepping motor 41, a swing cam 42, and the like.

  As shown in FIG. 10, the needle bar base 39 has a shape extending in the vertical direction substantially parallel to the needle bar 8, and is disposed in the vicinity of the left side of the needle bar 8. The upper end portion of the needle bar base 39 is supported by the support shaft 39a. An upper pivot portion 43 and a lower pivot portion 44 are supported by the frame so as to be swingable and support the needle bar 8 so as to be movable in the vertical direction. Accordingly, when the needle bar base 39 swings in the left-right direction, the needle bar 8 also swings in the left-right direction.

  The swing lever 40 has a shape extending in the vertical direction substantially parallel to the needle bar base 39, and a substantially middle step in the vertical direction is pivotally supported by a pivot pin 45 supported by the sewing machine frame. The lower end portion 46 abuts on a cam body 47 fixed to the lower end portion of the needle bar base 39, and a pin 49 is fixed to the upper end portion 48 to swing the needle bar base 39 in the left-right direction. It abuts on the cam surface 50 of the moving cam 42. The needle bar base 39 is configured such that the lower end thereof is urged leftward by a coil spring (not shown) and the respective contact states are maintained. The swing cam 42 is rotatably supported by the sewing machine frame, and a stepping motor 41 fixed to the sewing machine frame drives the swing cam 42. The swing cam 42 has a gear formed on the outer peripheral portion thereof and meshes with the drive gear 51 of the stepping motor 41.

The swing cam 42 is formed with a cam surface 50 in which a radially enlarged cam surface 52 having a large distance from the rotation axis and a radius reducing cam surface 53 having a small distance from the rotation axis are continuous.
As shown in FIG. 11, when the swing cam 42 is rotated by the rotation of the stepping motor 41 and the pin 49 comes into contact with the radially enlarged cam surface 52 having a large distance from the rotational axis of the swing cam 42, the swing lever The upper end 48 of the lever 40 moves to the left, and the lower end 46 of the swing lever 40 moves to the right via the pivot pin 45, so the needle bar base 39 also moves to the right.

  As shown in FIG. 12, when the swing cam 42 is rotated by the rotation of the stepping motor 41, and the pin 49 comes into contact with the radius reducing cam surface 53 having a small distance from the rotational axis of the swing cam 42, the swing lever 40. The upper end portion 48 of the swing lever 40 moves to the right, and the lower end portion 46 of the swing lever 40 moves to the left via the pivot pin 45, so that the needle bar base 39 also moves to the left.

  That is, when the lower end portion 46 of the swing lever 40 moves rightward (see FIG. 11) by the needle swing mechanism 9, the needle bar base 39 is brought into a position where it can come into contact with the contact portion 31 a of the contact member 31. Moving. At this time, when the support member 20 is lifted together with the embroidery presser 14 by the lifting operation of the presser bar 10, the contact part 31a comes into contact with the needle bar base 39 and the wiper member 16 is operated.

  On the other hand, in a state where the lower end portion 46 of the swing lever 40 is moved leftward (see FIG. 12), the needle bar base 39 moves to a retracted position where it cannot contact the contact portion 31a. Even if the support member 20 is lifted together with the embroidery presser 14 by the raising operation, the wiper member 16 does not operate because the abutting portion 31a is not in contact with the needle bar base 39 but is positioned on the right side of the needle bar base 39.

Next, the frictional resistance imparting member 29 provided in the yarn engaging portion 27 of the wiper member 16 will be described.
As shown in FIGS. 2 to 9, 13, and 14, the frictional resistance applying member 29 includes a pile member 55 that is fixed to the entire lower surface of the yarn engaging portion 27. The pile member 55 has a structure in which fluffs of short fibers (for example, fluff) are planted in a uniform and dense manner over the entire bottom surface of the base fabric, and is held by the thread engaging portion 27. Friction resistance is imparted to the yarn end of the upper yarn. When the thread engaging portion 27 is positioned on the upper side of the presser foot 13 of the embroidery presser 14 so as to approach and oppose from above, the tip portion of the fluff of the pile member 55 comes into contact with the upper surface of the presser foot 13 and the thread engages. The yarn end portion can be held by the cooperation of the portion 27 and the presser foot portion 13.

Here, operation | movement of the wiper apparatus 15 is demonstrated based on FIGS. 13-17.
FIG. 13 shows a state in which the upper thread is cut by a thread cutting mechanism (not shown) provided in the bed portion 1 after the embroidery sewing is completed.
In this state, when the needle bar 8 is moved rightward by the needle swinging mechanism 9 and then the presser bar 10 is raised and the embroidery presser 14 is raised, the contact part 31a comes into contact with the needle bar base 39, and FIG. 14 and 15, the wiper member 16 rotates to perform a thread wipe operation, and the thread end portion of the cut upper thread is pulled up to the upper side of the work cloth W.

As shown in FIG. 14, when the yarn end portion of the upper yarn is pulled up by the wiper member 16, the yarn end portion of the upper yarn comes into contact with the fluff of the pile member 55 and a frictional resistance is applied. Therefore, even if the tension applied to the thread end of the upper thread disappears at the moment the thread end of the upper thread comes off from the work cloth W and the slack occurs, the thread end of the upper thread is The thread engaging portion 27 is securely locked without dropping from the through hole 28.
Next, when the presser bar 10 is lowered, the wiper member 16 is lowered with the yarn end portion of the upper yarn being locked to the yarn engaging portion 27 as shown in FIG. After that, as shown in FIG. 17, when the wiper member 16 further descends and returns to its standby position, the yarn end portion of the upper thread is pinched by the fluff tip portion of the pile member 55 and the upper surface portion of the presser foot portion 13. Being held. Thus, when the wiper member 16 moves backward from the operating position to the standby position, the yarn end portion of the upper thread is pinched and held.

Next, the function and effect of the wiper device 15 described above will be described.
The wiper device 15 includes a wiper member 16 that performs thread wiping, and the thread end portion of the upper thread that has been cut by the thread cutting mechanism after the sewing is cooperated by the presser foot 13 and the thread engaging portion 27 of the wiper member 16. Since it is held, the stitches at the beginning of the next sewing are normally formed, and the quality of the sewing product can be improved. Furthermore, since the configuration is simple, the apparatus can be miniaturized and the manufacturing cost can be reduced.
Further, since the pile member 55 provided on the lower surface of the yarn engaging portion 27 is configured to apply a frictional force to the yarn end portion of the upper yarn, the yarn end portion of the upper yarn is engaged with the yarn engaging during the yarn wiping operation. It can prevent falling off from the portion 27. In addition, since the yarn end portion of the upper thread is sandwiched and held between the frictional resistance applying member 29 and the upper surface portion of the cloth presser portion 13, the configuration for holding the yarn end portion of the upper yarn is saved. be able to.

  The wiper member 16 has a thread engaging portion 27 that holds and holds the yarn end portion of the upper thread with the cloth presser portion 13, and the sewing needle 5 can be inserted into the thread end portion of the upper thread in the engaging portion 27. Since the insertion hole 28 is provided, the yarn end portion of the upper thread is clamped in a state of being inserted into the through hole 28 of the yarn engaging portion 27, and the yarn end portion of the upper yarn can be held more reliably. .

Next, a modified example in which the above embodiment is partially modified will be described.
1] In the embodiment, the frictional resistance imparting member 29 is provided on the entire lower surface portion of the thread engaging portion 27. However, not the entire lower surface portion but the yarn end portion of the upper thread contacts the thread engaging portion 27. You may comprise so that it may provide in a part of front part.
Further, the frictional resistance imparting member 29 may be provided not only on the lower surface portion of the thread engaging portion 27 but also on the upper surface portion of the cloth presser portion 13. Alternatively, the frictional resistance imparting member 29 may be provided only on the upper surface portion of the cloth presser portion 13.
2] In the embodiment, the frictional resistance imparting member 29 is a pile member, but is not limited to a pile member, and may be a member such as felt, sponge, urethane foam, rubber, and hook-and-loop fastener.

3] The shape of the thread engaging portion 27 is substantially the same as that of the presser foot 13 in plan view, but may be different from the shape of the presser foot 13.
4] In addition, those skilled in the art can implement the present invention in various forms with various modifications, and the present invention includes such various modified forms.

1 is a perspective view of an embroidery sewing machine in a state where a wiper device according to an embodiment of the present invention is mounted. It is a left view of the wiper device. It is a front view of the wiper device. It is a right view of the wiper device. It is a perspective view of the wiper device. It is a left view which shows the operating state of a wiper member. It is a front view which shows the operating state of a wiper member. It is a right view which shows the operating state of a wiper member. It is a perspective view which shows the operating state of a wiper member. It is a front view of a needle swing mechanism. It is a front view of the needle swing mechanism in the needle bar right swing state. It is a front view of the needle swing mechanism in the needle bar left swing state. It is a perspective view which shows the standby state of a wiper member. It is a perspective view which shows the state in the middle of the thread wiper operation of a wiper member. It is a perspective view which shows the state at the time of the completion | finish of the thread wiper operation of a wiper member. It is a perspective view which shows the state in the middle of the return to the standby position of a wiper member. It is a perspective view which shows the state which returned to the standby position of the wiper member.

Explanation of symbols

M embroidery sewing machine W work cloth 5 sewing needle 13 cloth presser part 15 wiper device 16 wiper member 27 thread engaging part 29 friction resistance applying member 55 pile member

Claims (8)

It is attached to the embroidery presser having a cloth presser part through which the sewing needle can be inserted, and after the upper thread extending from the stitch hole of the sewing needle is cut by the thread cutting means, the thread is wiped so that the thread end of the upper thread is pulled out to the upper side of the work cloth. In a wiper device having a wiper member to perform,
A sewing machine wiper device configured to hold a yarn end portion of an upper thread by cooperation of the cloth presser portion and the wiper member.   The wiper device for a sewing machine according to claim 1, wherein the wiper member has a thread engaging portion that holds the yarn end portion of the upper thread while sandwiching the upper end thereof with the cloth presser portion.   The wiper member is pivotally supported by the embroidery presser so as to be able to swing over an operation position where thread wiping is performed and a standby position when the wiper is not operated. 3. The sewing machine wiper device according to claim 2, wherein the yarn end portion of the yarn is configured to be held between the cloth presser portion and the yarn engaging portion.   3. A friction resistance imparting member that imparts a frictional resistance to a yarn end portion of the upper thread that is held is provided on at least one of the cloth presser portion and the yarn engaging portion. Or the wiper device of the sewing machine of 3.   The frictional resistance applying member is fixed to the lower surface portion of the yarn engaging portion, and the upper end portion of the upper thread is sandwiched and held between the frictional resistance applying member and the upper surface portion of the cloth presser portion. The sewing machine wiper device according to claim 4, wherein the wiper device is a sewing machine.   6. The sewing machine wiper device according to claim 4, wherein the frictional resistance imparting member comprises a pile member in which short fibers are planted on a base fabric.   The wiper device for a sewing machine according to any one of claims 2 to 4, wherein the shape of the cloth presser portion and the thread engaging portion in a plan view is substantially the same shape.   The sewing machine wiper device according to any one of claims 2 to 4, wherein the cloth presser portion and the thread engaging portion are formed with a through hole through which the sewing needle can pass.