JP6975533B2 - Short Goals-Seams with Seam Protrusion-Methods for Creating Starting Needle Threads, and Constituent Groups for Performing That Method, and Sewing Machines with Such Constituent Groups. - Google Patents

Description

The present invention relates to a method for making a seam-starting needle thread with a target-seam protrusion of up to 10 mm. The present invention further relates to a constituent group for performing such a method, and a sewing machine having such a constituent group.

A plurality of sewing machines are known from Patent Document 1, Patent Document 2, Patent Document 3, and Patent Document 4.

EP 1 847 641 B1 DE 102 34 251 C1 DE 10 2006 019 193 A1 DE 101 23 075 C1

An object of the present invention is to provide a method of providing a seam-starting needle thread with a desired short target-seam protrusion. With such a method, it is expected that the starting thread can be avoided with maximum certainty from being visible from the visible side (front side) of the sewing material sewn beyond the edge of the sewing material. Is done.

This problem is solved according to the present invention by a method having the characteristics according to claim 1.

According to the present invention, for example, as is well known from Patent Document 2, the needle thread-starting portion can not only be pulled down through the sewing material at the start of seam formation, but also pulled down. It has been shown that the thread-starting part can also be guided and processed to result in the desired short target-seam protrusion. The target to be created-seam protrusion (protrusion from the seam) can be up to 9 mm, up to 8 mm, up to 7 mm, and also shorter. ..

Cutting the needle thread-starting portion according to claim 2 directly results in a short target-seam protrusion.

The needle thread-starting portion clamp captured pursuant to claim 1 is controlled along the seam at the beginning of the seam where the longer needle thread-starting portion itself should be created when performing the first stitch. It is positioned and thus ensures that the start end of the needle thread-starting portion protrudes (jumps out) from the seam at the maximum length of one stitch length. As long as a stitch length of up to 10 mm is guaranteed at this seam-start, this will automatically lead to the desired short target of needle thread-seam protrusion being achieved. The needle thread-capture clamp may be disposed adjacent to the needle thread capture portion. The needle thread catching part may be used as a hook of a sewing machine at the same time, or may be a stitch forming device. Alternatively, the needle thread catcher on the one hand and the hook on the other hand can be different sewing machine components. The needle thread-capture clamp may be formed by one dedicated clamp unit, in which the needle thread-start portion is controlled and carried by the needle thread capture section. Such a clamp unit may be formed in the immediate vicinity of the needle thread catching portion. Alternatively, the clamp may be formed by two members present in the sewing machine anyway, and the needle thread-starting portion is aimed and inserted after being captured by the needle thread trapping section between them. These clamp-members are bobbin-bobbin on the one hand and bobbin-bobbin case on the other.

The length setting of the needle thread-start portion via the needle thread-capture clamp according to claim 3 avoids the needle thread-start portion from reaching an undesired length. The needle thread-capture clamp is further utilized to allow the hook to actually pull out the needle thread-start and to prevent the needle thread from being subsequently pulled out of the needle thread path between the sewing needle and the needle thread stock. obtain.

A shorter start-stitch length according to claim 4 , for example one short start stitch, two short start stitches, or three short start stitches, both needle thread-start portions are desired during the feed and process steps. Avoid being taken into the feeder without being caught. In the presence of such carry-in, it is undesirably understood that the needle thread will have an extended path between the sewing material and the exit portion from the stitch hole.

The pull-out of the needle thread or the adjustment of the needle thread guide according to claim 5 via the thread tensioning device is utilized for the adjustable setting of the needle thread guide and the needle thread processing, for example, a different woven fabric (fabric). And / or can be used to adapt to different yarn qualities. The adjustment of the thread tensioning device may depend on the implementation or action of the needle thread-capture clamp. In such a manner, the co-operation with the needle thread-capture clamp of the thread tensioner can be optimized.

The advantages of the constituent group according to claim 6 correspond to the advantages already discussed in relation to the production method according to the present invention. The hook and needle thread catcher may be one and the same component. Instead, the hook and needle thread catcher may be formed by separate components from each other.

The needle thread cutter according to claim 7 enables reliable cutting of the captured needle thread-starting portion. The needle thread cutter may be a mechanical component formed as a component separate from other thread pulling cutters for cutting the thread at the seam end. Instead, the needle thread cutter may be implemented as a stringing cutter for cutting the thread at the end of the seam at the same time.

The attachment of the needle thread catcher and particularly the needle thread cutter according to claim 8 results in that the needle thread-starting portion can be guided independently of the movement of the feed section and can be cut particularly short.

The advantages of the needle thread-capture clamp according to claim 1 correspond to the advantages already described in the context of the capture clamp step of the fabrication method. The needle thread-capture clamp may be disposed adjacent to the needle thread capture portion. In that case, the needle thread-capture clamp may also be attached to the support for the sewing material-feed section. The needle thread-capture clamp may be formed by the cooperation of the bobbin housing and the bobbin of the sewing machine.

The placement of the needle thread-capture clamp according to claim 1 simplifies the controlled guide of the needle thread-start portion.

The advantages of the needle thread-capture clamp according to claim 9 correspond to the advantages already discussed with the guide clamp step in the fabrication method.

The same applies to the thread tensioning device according to claim 10.

Appropriate settings by the needle thread-guide clamp and / or thread tensioning device prevent, in particular, the length of the drawn needle thread-starting portion from becoming entangled with the bobbin thread at its time of withdrawal.

The suction device according to claim 11 avoids undesirably collecting the rest of the thread in the area of the sewing machine.

The advantages of the sewing machine according to claim 12 correspond to the advantages already described in detail in relation to the production method and the sewing-constituent group.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

The front view of the lockstitch sewing machine is shown. The schematic perspective view of the stitch formation area of a sewing machine is shown. The top view of a portion of the sewing machine is enlarged and shown corresponding to the stitch arrow III in FIG. 1, and the stitch forming device is shown at the loop lift position when the upper thread ring is captured by the sword tip. A drawing similar to FIG. 3 shows a stitch forming instrument at a momentary position following the position according to FIG. 3, at which point the needle thread start portion with a free sword tip is completely pulled out from the sewing material. A drawing similar to FIG. 3 shows a momentary position following the position according to FIG. 4, at which moment the needle thread catcher collaborates with the needle thread-receiving blade to cut the free end of the needle thread. NS. Top views of seams sewn using the sewing-constituent group according to FIGS. 3-5 are schematically shown to specifically show the set target-seam created with the seam protrusion-starting needle thread. Another practice for controlling and guiding the captured needle thread-starting portion is shown in a drawing similar to FIGS. 3-5, where the needle thread-starting portion is of the bobbin cover and bobbin housing of the bobbin bobbin. It is sandwiched between. A top view of a seam sewn using the Sewing-Constituent group according to FIG. 7 is schematically shown to specifically show the set target-the seam created with the seam protrusion-the starting needle thread.

The lockstitch sewing machine 1 has a base plate 2, and the base plate 2 has a stand 3 extending upward from the base plate 2 and a bent arm 4. The latter is terminated by the head 5. Inside the arm 4, the arm shaft 6 is rotatably supported. This drives a crank drive 7 with a balance 8 in the head 5. The crank drive 7 is in a state of being connected to the needle bar 9 which is drivenly supported in the head 5 so as to be displaceable on the axis. It has a needle 10 at its lower end. The needle 10 can be moved up and down on the vertical shaft 11 by the crank drive 7.

In order to express the positional relationship concisely, the xyz Cartesian coordinate system is used in the following. The vertical axis 11 extends along the z direction of this coordinate system. The x-direction extends so as to enter the plane perpendicular to the plane of FIG. 1 and parallel to the seam direction of the sewing machine 1. The y direction extends to the left in FIG.

The needle 10 guides the needle thread 13 provided from the thread winding 12 via the thread tensioning device and the balance 8 in the needle hole, and the needle thread 13 is also referred to as a needle thread. The needle thread 13 has a free needle thread start portion 13a.

The base plate 2 supports a mounting plate 14 fixed with screws, on which a sewing material 15 is placed. The mounting plate 14 is formed with a notch for passing the lower cloth feed 17. The cloth feed 17 has a stitch hole 18 for the needle 10 to enter. The cloth feed 17 is in a state of being drive-connected to the extrusion and lifting drive gears arranged below the base plate 2 in a known manner.

A hook 19 exists below the mounting plate 14, and the hook 19 has an outer hook (capturing body) 20 having a sword tip 21. Inside the outer hook 20, a pot-shaped bobbin housing 22 for accommodating the supplementary thread stock in the form of the bobbin 22a is housed. In the schematic according to FIG. 2, the upper edge contour of the bobbin housing 22 on the one hand and the upper edge contour of the bobbin 22a on the other hand are suggested by the broken line. Supplementary thread is also called bobbin thread.

The hook 19 is rotatable around a vertical hook shaft 23 extending in the z direction. The sewing drive-rotation direction 24 of the outer hook 20 is extended clockwise around the hook shaft 23 in FIG. The outer hook 20 is fixedly connected to a shaft 25 extending coaxially with the hook shaft 23. The shaft 25 is rotatably housed in a bearing block 26 screwed to the base plate 2. A drive shaft (lower bar) 27 is housed inside the drive shaft 27, and the drive shaft 27 is connected to a gear drive arranged inside the bearing block 26. The gear drive has a gear ratio of 1: 2, and as a result, when the drive shaft 27 makes one rotation, the outer hook 20 existing on the shaft 25 makes two rotations. The drive shaft 27 is drivenly connected to the arm shaft 6 via a drive belt 28.

For example, a thread pulling cutter 29 known from Patent Document 1 is used to cut the needle thread 13 and the trapping thread at the seam end.

In order to hold and feed the sewing material 15, the sewing machine 1 also has an additional presser foot 30 and an upper feed portion 31, in which the upper feed portion 31 feeds the lower cloth feed 17 to feed the sewing material. Collaborate with.

Schematic FIG. 2 further shows the path of the needle thread 13 from the spool 12 to the needle thread start portion 13a. The needle thread 13 starts from the spool 12 and is guided to the needle 10 via the thread tensioning device 32, the balance 8, and the needle thread-guide clamp 33.

The needle thread-guide clamp 33 has a tension disc 34 fixed to the guide shaft 35. Through the pressing spring 36, the tension disc 34 is attracted to the support portion 37 of the needle thread-guide clamp 33 fixed to the housing for sandwiching the needle thread 13. An electromagnet 38 schematically shown in FIG. 2 is attached to the support portion 37, and the electromagnet 38 is driven and controlled via a central control device 39 of the sewing machine 1 in a manner not shown in detail. ..

With reference to FIGS. 3 to 5, the implementation of a sewing machine-construction group for creating a seam starting thread with a target of up to 10 mm-seam protrusion is described below.

This sewing machine-construction group has a needle thread catching unit 40 for catching the needle thread 13. The needle thread catching portion 40 has a catching hole 41 at its free end (see also FIG. 5), and the catching hole 41 is also used as a movable needle thread cutter at the same time. The free end of the needle thread catching portion 40 extends below the lower cloth feed 17 at the start position shown in FIG. 3, where the catching hole 41 is aligned with the stitch hole 18. The needle thread catching portion 40 has an L-shaped curved base 42, and is supported via a swing bearing 43. The oscillating bearing 43 may be fixedly connected to the housing, or may be fixedly connected to the feed support portion 44 of the lower cloth feed 17 instead. The swing bearing 43 can be used to move the substrate 42 of the needle thread capture section 40 around the rotation shaft 45 between the start position and the cutting end position according to FIG. FIG. 5 shows the intermediate position of the substrate 42 between the start position and the cutting end position. The swing shaft 45 extends parallel to the z direction. The needle thread capture unit 40 is operated via a drive unit that uses compressed air, and the drive unit is not shown in the drawing, and also carries an operation hole 46 of the substrate 42, and the operation hole is supported. 46 is designed on the substrate 42 adjacent to the swing shaft 45.

With reference to FIGS. 3 to 5, in the following, a method for creating a seam starting yarn with a target-seam protrusion of up to 10 mm will be described.

FIG. 3 shows the stitch former of sewing machine 1 at the loop lift position. The needle 10 is detached from its bottom dead center and is moved upward again in the positive direction of the z-axis until the needle ring 47 is formed. At the momentary position according to FIG. 3, the sword tip 21 has entered the upper thread ring 47. The needle thread catching portion 40 is at the start position, and the needle thread ring 47 is formed below the catching hole 41 of the needle thread catching section 40. The needle thread ring 47 is a needle thread portion that is guided from the upper side to the lower side thereof through the sewing material 15 by using the needle 10.

The capture holes 48 are arranged below the lower cloth feed 17 with a very small interval. This interval is less than 1 mm.

The start portion 13a of the free needle thread still protrudes upward from the sewing material 15 at this momentary position according to FIG.

FIG. 2 shows the instantaneous position of the orbit of the hook immediately after the position according to FIG.

FIG. 4 shows the instantaneous position of the stitch forming device after the hook orbits more than 180 ° as compared with FIG. When circling in this way, the sword tip 21 pulls out the needle thread-starting portion 13a completely downward through the sewing material 15. The needle thread-starting portion 13a also passes downward through the stitch hole 18 and the capture hole 41. The needle thread 13 extends between the sword tip 21 and the stitch hole 18, and above the hook 19 and below the thread tension cutter 29, and is first captured from below toward the sewing material. 41 and subsequently through the stitch hole 18 of the lower cloth feed 17. The needle thread-starting portion 13a is pulled out using the kettle 19 until all of the needle thread-starting portion 13a is under the sewing material.

While the needle thread-start portion 13a is pulled out by the sword tip 21, the needle thread-capture clamp 33 is closed, and as a result, the needle thread 13 is the needle thread in the needle thread path upstream of the needle thread-capture clamp 33. It cannot be subsequently withdrawn from the stock. After the needle thread-starting portion 13a is pulled out by the sword tip 21, the needle thread capture-clamp 33 is opened.

FIG. 5 shows an intermediate position of the substrate 42 of the needle thread catching portion 40, and this intermediate position is between the start position according to FIGS. 3 and 4 and the cutting end position immediately before the cutting of the needle thread-start portion 13a. It is in. When the substrate 42 swings, the needle thread catching portion 40 catches the needle thread 13 through the catching hole 41 in order to shorten the needle thread start portion 13a. At the position according to FIG. 5, the edge angle of the capture hole 41 serves as a needle thread cutter and cooperates with the receiving blade fixed to the housing of the constituent group for cutting the needle thread 13. At the momentary position according to FIG. 5, the needle 10 is detached above the stitch hole 18.

As a result of this cutting step, the needle thread 13 is defined and shortened. The free end of the needle thread-starting portion 13a has a maximum length of 10 mm and is present on the sewing material 15 at the seam starting portion. This extra length of the needle thread-starting portion 13a can take a value shorter than 10 mm, and can take a value shorter than 9 mm, 8 mm or 7 mm, or even shorter. Is also possible.

The cutting of the needle thread 13 by the needle thread cutter 41 with the receiving blade 48 is the final result of guiding the needle thread-starting portion 13a captured by the needle thread catching unit 40, and the cutting is the longest. However, it is the processing of the needle thread-starting portion 13a so as to realize the desired seam protrusion of the needle thread-starting portion 13a of 10 mm.

A seam can then be formed as a lockstitch seam with the involvement of the needle thread 13 and the bobbin thread not shown in detail in FIGS. 1-5. At the end of the seam, a thread cutting step of the needle thread 13 and the bobbin thread is subsequently executed using the thread tension cutter 29.

The stitch length may be reduced by using the control device 39 during the sewing process, and particularly during cutting the needle thread-starting portion 13a according to the sequence of FIGS. 3-5. This avoids unwanted relative movement between the lower cloth feed 17 and the needle thread-starting portion 13a.

The top view of FIG. 6 shows the seam 48a at the seam-starting portion, which seam 48a was brought about using the sewing-construction group according to FIGS. 3-5. The sewing direction extends to the left along the x direction of FIG. Based on the needle thread portion between the needle thread cutter 41 and the receiving blade 48, the needle thread-starting portion 13a at the start of the seam 48a is short enough to provide the longest seam protrusion A of 10 mm.

Figure 6 is a first two starting stitch S _1, S ₂ are also shown to have contracted than subsequent stitch S ₃ -S _n.

With reference to FIG. 7, the following describes another implementation of a target-seam-sewing-member groom to bring a seam-starting thread with a seam protrusion of up to 10 mm. The components corresponding to the respective components already described with reference to FIGS. 1 to 5 are designated by the same reference numerals, and they will not be described again individually.

The configuration group according to FIG. 7 additionally has a lift device 49, schematically shown in FIG. 7, for each configuration group according to FIGS. 1-5. The lift device 49 may be designed as a pneumatic cylinder. The lift device 49 can be controlled via the central control device 39. The lift device 49 is disposed between the bottom of the bobbin housing 22 and the bottom wall below the bobbin 22a. The lift movement of the bobbin 22a with respect to the bobbin housing 22 along the movement path 50 suggested in FIG. 2 may be achieved via the lift device 49. In the position where the bobbin 22a is lifted with respect to the bobbin housing 22, the cover wall portion 51 of the bobbin 22a is 0.5 mm above the bobbin housing 22 on the veranda, beyond the bobbin accommodating portion 52 facing the bobbin housing 22. Longer than, for example, longer than 1 mm.

Follow FIG. 7 to control and guide and process the needle thread-starting portion 13a captured using the needle thread capture section 21 and, as a result, to achieve the desired target-seam protrusion of up to 10 mm. Configuration groups work as follows:

With respect to forming the needle thread loop 47 and capturing it with the sword tip 21, the constituent group according to FIG. 7 first functions as previously described in the context of FIGS. 1 to 3.

Upon reaching the momentary position corresponding to FIG. 3, the lift device 49 is operated so that the bobbin 22a projects beyond the upper edge of the bobbin housing 22. Subsequently, the sword tip 21 pulls out the needle thread 13 and moves the needle thread-starting portion 13a downward through the sewing material 15 in response to the description already given in connection with the implementation according to FIGS. 1-5. pull. In the implementation according to FIG. 7, as shown in FIG. 7, the needle thread-start portion 13a is based on the overhang of the cover wall portion 51 of the bobbin 22a beyond the bobbin housing 22, and the cover wall portion 51 and the bobbin housing. It will exist between 22. Therefore, in part, the needle thread 13 is present in the bobbin 22a.

At the momentary position of the sword tip 21 according to FIG. 7, or at the rotational position of the sword tip 21 further advanced by about 45 °, the lift device 49 is moved to its starting position, and as a result, the bobbin 22a is again in the bobbin housing 22. It sinks to the normal position. The needle thread-starting portion 13a is subsequently sandwiched between the bobbin 22a and the bobbin housing 22. Then, the bobbin 22a and the bobbin housing 22 form the needle thread capture clamp portion.

If subsequent stitches are formed at the momentary position according to FIG. 7 and the clamp of the needle thread-start portion 13a, the needle thread-start portion 13a is gradually pulled out from the needle thread capture clamp portions 22a, 22 in the advancing seam process. At that time, the needle thread-start portion 13a is entwined by the bobbin thread and tied at the time of seam formation, as in the case of the needle thread start portion guided directly from the upper part through the stitch hole 18 from the sewing material 15. Be done. The free start of the needle thread-start portion 13a can then have a length within the length of one stitch. As long as the stitch length is adjusted to a maximum of 10 mm, a desired target seam protrusion of a maximum of 10 mm can be provided by the needle thread start portion 13a.

FIG. 8 shows a single seam 48b created using the sewing-construction group according to FIG. The needle thread-starting portion 13a, in the case of the seam 48b, does not separate from the seam 48b at the seam start, but only between the stitches Si and Si + 1 and separates from the seam 48b. The value of i depends on the length of the needle thread-starting portion 13a pulled down below the sewing material 15, which gradually clamps between the bobbin 22a and the bobbin housing 22 during sewing. Pulled out of the club. i can be in the range, for example, between 4 and 10. Even in the seam 48b, the seam protrusion (protrusion from the seam) A of the needle thread-starting portion 13a is 10 mm at the longest.

In another sewing-seam configuration group, the needle thread-guide clamp 33 can be omitted. By adjusting the thread tension acting on the needle thread 13 via the thread tensioning device 32, the needle thread 13 is subsequently pulled out from the needle thread start portion 13a when the needle thread-start portion 13a is pulled out and / or guided. A desired ratio of the degree of the length of the needle thread 13 to the degree of the length of the needle thread 13 drawn from the needle thread path up to the sewing needle 10 is realized. The stronger the yarn tension is adjusted, the greater the proportion of the length drawn from the needle thread-starting portion 13a compared to the degree of length of the needle thread 13 available by the thread tensioning device 32.

The sewing-configuration group may further have a suction device 53, which is schematically suggested in FIG. 5, because the suction device 53 sucks in the needle thread start portion cut by the needle thread cutter 41. belongs to. The suction device 53 is arranged adjacent to the cutting edge of the receiving blade. The suction device 53 is connected to a negative pressure source.

The needle thread catcher 40 with the catch hole 41 can be used without a blade in another variation of the target-seam-seam-sewing to create the starting needle thread-with a seam protrusion of up to 10 mm. The needle thread capture section 40 then cooperates with the needle thread-capture clamp of the clamp type described above between the bobbin 22a and the bobbin housing 22. The needle thread-capture clamp may be arranged adjacent to the needle thread capture portion 40.

In this variation of the sewing-construction group, the needle thread-starting portion 13a is not cut, but is controlled and guided, as previously detailed in connection with FIGS. 7 and 8, the seam-starting portion. Is sewn on. In this sewing process, the synchronous movement of the capture hole 41 with respect to the positive and negative (+/-) y-direction seam formation can achieve the following: the needle thread-starting portion 13a gradually becomes the needle thread-. When pulled out of the capture clamp, it can be moved to the right (negative y direction) and left (positive y direction) in the stitch hole so that it is always placed below each stitch and sewn underneath. Can be achieved. In order to ensure this arrangement of the needle thread-starting portion 13a in the positive and negative y directions (+/- y direction), the side portion of the stitch hole 18 is not in a roundly curved state but is linearly extended. It may be formed, and when sewing the start-seam portion, the needle thread-start portion 13a is guided through this side portion.

10 Sewing needle 13 Upper thread 13a Upper thread-Starting part 15 Sewing material 17 Sewing material-Feed 18 Stitch hole 19 Kama 21 Sword tip 22, 22a Capture clamp 32 Thread tensioning device 33 Upper thread-Guide clamp 40 Upper thread capture part 41 Upper thread Cutter 44 Support 47 Needle thread 53 Suction device A Seam protrusion S ₁ , S ₂ Start-Stitch length S ₃ Normal-Stitch length

Claims (12)

A method for creating a seam start needle thread with a target seam protrusion (A) of up to 10 mm.
It has the following steps, that is,
The process of pressing the sewing material (15) using the presser foot (30),
A step of feeding the needle thread portion (47) from the upper side of the sewing material to the lower side of the sewing material through the sewing material (15) using the sewing needle (10).
A step of pulling out the needle thread start portion (13a) using the hook (19) until all the needle thread start portions (13a) are on the lower side of the sewing material.
A step of capturing the needle thread start portion (13a) previously pulled out using the hook (19) using the needle thread catching unit (40).
The needle thread start portion captured by using the needle thread capture clamps (22a, 22) arranged adjacent to the needle thread capture portion (40) in order to create the seam protrusion (A). The process of sandwiching (13a),
A step of guiding the needle thread start portion (13a) using the needle thread capture portion (40) and processing the needle thread start portion (13a) so that the seam protrusion (A) occurs.
Have,
The needle thread catching section (40),
The presser foot (30) and
The kettle (19)
Designed as a different component of the sewing machine,
Method. In the method according to claim 1,
Cutting the captured needle thread start portion (13a) using a needle thread cutter (41) to create the seam protrusion (A).
A method characterized by. In the method according to claim 1 or 2.
A method characterized in that the length of the needle thread start portion (13a) is set via a needle thread guide clamp (33) existing before the sewing needle (10) in the needle thread path. In the method according to any one of claims 1 to 3,
The needle thread start portion (13a) is fed through the sewing material (15) and then guided through the stitch hole (18) of the sewing material feed (17). The above method is performed with a starting stitch length (S ₁ , S ₂ ) shorter than the length (S _3).
A method characterized by. In the method according to any one of claims 1 to 4,
When pulling out and / or guiding the needle thread start portion (13a),
The degree of length of the needle thread (13) pulled from the needle thread start portion (13a), and
Degree of length of the needle thread (13) drawn from the needle thread path to the sewing needle (10),
A method comprising an adjustment of a thread tensioning device (32) within the needle thread path to the sewing needle (10) such that a desired ratio is produced from the thread tensioning device (32). In the configuration group for performing the method according to any one of claims 1 to 5.
Needle bar (9), which holds and drives the sewing needle (10) for guiding the needle thread (13),
Kettle (19),
Presser (30) for holding the sewing material (15),
The needle thread catching section (40) for catching the needle thread (13),
The needle thread capture clamp (22a, 22) for sandwiching the captured needle thread start portion (13a), and the needle thread capture clamp arranged adjacent to the needle thread capture portion (40). (22a, 22),
A composition group characterized by being equipped with. In the constituent group according to claim 6,
Configuration group, characterized in that it comprises a yarn cutter (41), the upper for cutting captured the upper yarn beginning portion (13a). In the constituent group according to claim 6 or 7.
The upper yarn capturing portion (40), such as are installed, configuration group, characterized in that it comprises a sewing material feed (17), the support (44) for the sewing material feed (17). In the constituent group according to any one of claims 6 to 8.
The needle thread guide clamp (33) for setting the length of the needle thread start portion (13a), and the needle thread guide clamp (33) existing in the needle thread path before the sewing needle (10). configuration group, characterized in that it comprises a. In the constituent group according to any one of claims 6 to 9.
Configuration group, characterized in that it comprises a thread tensioner device (32), adjustable in the upper thread path prior to the sewing needle (10). In the constituent group according to claim 7,
Configuration group, characterized in that it comprises a suction device (53), for sucking cut the upper yarn beginning was. A sewing machine comprising the constituent group according to any one of claims 6 to 11.

Images