JP2000157773A - Needle width adjusting mechanism for sewing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To form a pin point saddle stitch of an optional length by providing a needle width adjusting means which can adjust a needle width between a sewing needle and a catching needle in a sewing machine which forms the pin point saddle stitch by the sewing needle and the catching needle which are arranged in parallel in the fabric feeding direction. SOLUTION: On a fixed needle clamp body 10, a flat surface section 12 at the upper section of which a screw section 11 to be fixed to a needle bar, is provided in a manner to be located this side in the fabric feeding direction of a sewing machine, and a graduation M is provided at the central section, and a fixed needle clamp 13 is formed at the lower section. Then, on the fixed needle clamp 13, a pair of guide grooves 14 are formed in a manner to be in parallel with the fabric feeding direction on both side ends of the upper section, and at the same time, a slit 15 is formed in a manner to go through the guide grooves 14 by corresponding with the graduation M. Then, in the guide groove 14, the sliding section 26 of an adjustable needle clamp 25 is loosely fitted, and by screwing a screw 30 through the slit 15 which is formed on the guide groove 14, with a hole 27 and a threaded section 28 which are formed on the sliding section 26, the adjustable needle clamp 25 is location-adjustably fixed to the fixed needle clamp 13.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a sewing machine and a sewing machine in which a sewing machine and a sewing needle are arranged in parallel in the cloth feeding direction of a sewing machine in cooperation with a looper and a spreader, as shown in FIG. And a so-called pinpoint saddle stitch as a decorative seam of a product.

[0002]

2. Description of the Related Art Sewing machines which form a pinpoint saddle stitch of this kind are well known in the art, and FIG. 15 of a pinpoint saddle stitch is used to form a pseudo hand-stitched seam on the back of the fabric. The length L shown in the figure is a sewing needle arranged in front of the sewing machine in the cloth feeding direction;
It is determined by the distance between the sewing needle and the hook needle arranged rearward in the cloth feeding direction.

[0003] However, as shown in Fig. 16, a needle pin of a sewing machine for forming a conventional pinpoint saddle stitch of this kind is sewn to a needle pin 1 fixed to a needle bar (not shown) which moves up and down. The needle 2 and the hook 3 are fixed to the two holes 4 and 5 formed in the needle retainer 1 by screws 6 and 7, respectively.

[0004]

However, the length L of the pinpoint saddle stitch can be changed to various lengths depending on the design choice of the client or the producer. Need to be changed.
In such a case, in a conventional sewing machine that forms a pinpoint saddle stitch, the length L of the pinpoint saddle stitch is adjusted because the distance between the sewing needle 2 and the hook needle 3 is fixed. A large number of needle stays 1 having different center-to-center dimensions of the two holes 4 and 5 formed in the stay 1 are prepared in advance, and these needle stays 1 are provided each time the length L of the pinpoint saddle stitch differs. Needle clasp 1 must be replaced.

In the case where the needle clamp 1 is not replaced, it is necessary to prepare in advance a number of sewing machines having different sizes between the centers of the two holes 4 and 5 between the sewing needle 2 and the hook needle 3. is there. Therefore, preparing a large number of the needle stays 1 and the sewing machine requires a large amount of expense, and also requires time and effort to exchange the needle stays 1 and the sewing machine every time the length L of the pinpoint saddle stitch is different. In addition, there are problems such as reduced sewing work efficiency, and when trying to avoid those problems, the design of the production client or producer is limited, and only products with a limited design can be produced. There was a problem.

[0006]

In order to achieve the above object, according to the present invention, a pinpoint saddle is formed by a sewing needle and a hook needle which are arranged in parallel in a cloth feeding direction of a sewing machine in cooperation with a looper and a spreader. In a sewing machine for forming a stitch, a configuration is provided in which a needle width adjusting means for adjusting the width of the sewing needle and the hooking needle in the cloth feeding direction of the sewing machine is provided.

[0007] The invention having such a configuration has a pinpoint
In a sewing machine for forming a saddle stitch, a stitch 1 is used to adjust a length L of a pinpoint saddle stitch.
It is not necessary to prepare in advance a large number of staples 1 having different center-to-center dimensions of the two holes 4 and 5 formed at the same time, and the staples 1 are provided each time the length L of the pinpoint saddle stitch differs. 1 does not need to be replaced, and sewing needle 2 and hook needle 3
It is not necessary to prepare a large number of sewing machines having different center-to-center dimensions of the two holes 4 and 5 at the intervals between the sewing machine and the sewing machine, so that sewing costs are reduced and sewing work efficiency is improved. It has the effect of being able to respond to the design requests of the production client and the producer side in various ways.

[0008]

Embodiments of the present invention will be described below in detail with reference to the drawings. First, a first embodiment will be described with reference to FIGS. Reference numeral 10 denotes a fixed needle retainer, which is disposed in front of the sewing machine in the cloth feeding direction, that is, on the operator side. And a fixed needle stay 13 is provided below. Further, the fixed needle clamp 13 has a pair of guide grooves 14 on both upper ends thereof parallel to the cloth feeding direction and constituting one of the guide means, and a cloth feed through the guide grooves 14 corresponding to the scale M. Slot 1 parallel to the direction and constituting the adjusting means
5, a needle abutment hole 16 in the center portion parallel to the cloth feeding direction,
As shown in FIG. 3, a flat end face 19 provided on a handle 18 of the sewing needle 17 is slightly projected, and a needle hole 20 having an axis coinciding with the central axis of the threaded portion 11 is provided. A slit 21 formed so as to bisect the lower portion of the fixed needle 13 from the contact hole 16, and a hole 22 is formed on one side and a screw portion 23 is formed on the other side of the slit 21 as shown in FIG. ing.

The fixed needle stay 13 has a needle hole 20.
As shown in FIG. 3, the handle 18 of the sewing needle 17 is inserted so that its flat end face 19 projects slightly from below, and the upper end of the handle 18 abuts on the top of the needle abutment hole 16.
The sewing needle 17 is fixed by inserting the needle fixing screw 31 from the hole 22 and screwing it into the screw portion 23. Reference numeral 24 denotes an adjustment needle holder having an adjustment needle holder 25,
The adjusting needle stay 25 is disposed at a position rearward of the sewing machine in the cloth feeding direction of the sewing machine, and is parallel to the cloth feeding direction on both upper ends of the adjusting needle stay 25 and loosely fits in the pair of guide grooves 14 of the fixed needle stay 13. A pair of sliding parts 26, one hole 27 of the sliding part 26 and a screw part 28 facing the hole 27 and the other part of the sliding part 26, and a hole 27 above the hole 27 corresponding to the scale M of the flat part 12. A pointer S is provided. In addition, the adjustment needle stay 25 has a needle abutment hole 16a parallel to the cloth feeding direction at the center and a flat end face 19a provided on the handle 18a of the hook needle 29 as shown in FIG. Needle hole 20a and needle contact hole 16a
2 that is formed so as to bisect the adjustment needle stay 25 from
As shown in FIG. 3, a hole 22a is formed on one side, and a threaded portion 23a is formed on the other side, with reference to 1a and the abrasion 21a.

As shown in FIG. 3, the handle 18a of the hook 29 is inserted into the adjusting needle stay 25 from below the needle hole 20a so that the flat end surface 19a of the handle 29 projects slightly. Abuts on the upper end of the needle contact hole 16a,
Insert the needle fixing screw 31a through the hole 22a, and
The hooking needle 29 is fixed by screwing it into a.

The above-mentioned fixed needle stay 13 and adjustment needle stay 25
Is assembled as follows. First, the fixed needle holder 10 is fixed to a needle bar (not shown), and the guide groove 1 of the fixed needle holder 13 is fixed.
4, the sliding portion 26 of the adjusting needle stay 25 is loosely fitted, and the hole 27 and the screw portion 28 formed in the sliding portion 26 are aligned with the long hole 15 formed in the guide groove 14 of the fixed needle stay 13. Insert. At that position, the screw 30 as the engaging / disengaging means is
6, and through the elongated hole 15 formed in the guide groove 14, a screw 30 as an engagement / disengagement means is inserted.
Is screwed into a screw portion 28 formed in the sliding portion 26. When the screw 30 is screwed in firmly, the sliding portions 26 are drawn inward from each other and sandwich the guide groove 14 from both sides, whereby the adjusting needle stay 25 is fixed to the fixed needle stay 13. The needle interval with the hooking needle 29, in other words, the length L of the pinpoint saddle stitch shown in FIG. 15 is determined.

The elongated hole 15 and the screw 30 constitute a needle width adjusting means. The needle interval between the sewing needle 17 and the hooking needle 29, that is, the length L of the pinpoint saddle stitch is determined by the rightmost scale M provided with the pointer S on the flat portion 12 of the fixed needle holder 10 as shown in FIG. Screw 30 according to
When the adjusting needle clamp 25 is fixed to the fixed needle clamp 13 by tightening, the flat surface 19 of the handle portion 18 of the sewing needle 17 and the flat surface 19a of the hooking needle 29 are in close contact with each other, as shown in FIG. The needle interval with the hooking needle 29, that is, the length L of the pinpoint saddle stitch is the shortest.

When the sewing machine is driven in this state, the fixed needle stay 13 and the adjustment needle stay 25 move up and down together with the needle bar (not shown) together with the sewing needle 17 and the hooking needle 29.
As is well known, the sewing needle 7 and the hook 29 cooperate with a looper and a spreader to form a pinpoint saddle stitch by the sewing needle and the hook which are arranged in parallel in the cloth feeding direction of the sewing machine. The length L of the pinpoint saddle stitch is the shortest.

The pointer S is a flat portion 12 of the fixed needle holder 10.
The needle interval between the sewing needle 17 and the hooking needle 29, that is, the length L of the pinpoint saddle stitch, which matches the rightmost scale M provided at
In order to make the distance between the stylus 9 and the length L of the pinpoint saddle stitch longer, the following adjustment is made. When the screw 31 is loosened from the state shown in FIGS. 1 and 2, the sliding portions 26 are pulled inward from each other, and the fixing that has been fixed by sandwiching the guide groove 14 from both sides is released.

In this state, when the adjusting needle stay 25 is moved to the left, the sliding portion 26 of the adjusting needle stay 25 moves along the guide groove 14 of the fixed needle stay 13, and the screw 30 also moves left along the long hole 15. Then, the pointer S is selected based on an arbitrary scale M, and the movement to the left is stopped at an appropriate position. Then, the screw 30 is tightened again and the adjusting needle 25 is fixed to the fixed needle 13 in the same manner as described above.
, The needle interval between the sewing needle 17 and the hooking needle 29, that is, the length L of the pinpoint saddle stitch can be made longer.

In the above embodiment, the fixed needle stay 13
Is provided with an elongated hole 15, and a slot 1 is
5 is provided, but the long hole 15 is provided in the sliding portion 26 of the adjusting needle stay 25, and the screw 30 passing through the long hole 15 is fixed to the fixed needle stay 13, and the sliding portion 26 is provided. Can be fixed with nuts from outside. Further, in the above embodiment, the guide means is constituted by the guide groove 14 of the fixed needle stay 13 and the sliding portion 26 of the adjustment needle stay 25, but this guide means is parallel to the fixed needle stay 13 in the cloth feeding direction. Thus, two holes are arranged in parallel in the horizontal direction, and two shafts are provided in the adjusting needle stay 25 so as to be loosely fitted in the two parallel holes, and these two shafts are fixed at appropriate positions by screws. 13 can be fixed.

Further, in the above embodiment, the fixed needle stay 1
3 is provided with a guide groove 14 or two holes, and the adjusting needle 25 is provided with a sliding portion 26 or two shafts. A shaft may be provided, and the adjusting needle 25 may be provided with a sliding portion 26 or two shafts. An embodiment in which some of the above embodiments are put together will be described with reference to FIGS.

Parts having the same functions as those of the embodiment shown in FIGS. 1 to 4 are denoted by the same reference numerals, and detailed description thereof will be omitted. In the second embodiment shown in FIG. 5, a sliding portion 26 as guide means is provided on the fixed needle stay 13 in parallel with the cloth feeding direction, and the guide groove 14 into which the sliding portion 26 is loosely fitted is provided with the adjusting needle stay 25. And a slot 30 in which the slot 15 is formed in the sliding portion 26 and a fixing screw 30a is loosely fitted in the guide groove 14.
This is a configuration in which c is formed.

In the embodiment shown in FIG. 5, the guide groove 14 of the adjusting stitch 25 is loosely fitted to the sliding portion 26 of the fixed stud 13, and the fixing screw 30a is passed through the elongated hole 15 and the hole 30c. , Fixing screws 30a from the outside of the opposite sliding portion (not shown)
When the nut 30b is screwed into the nut and the nut 30b is loosened, the fixing of the adjusting pin 25 and the fixed pin 13 is released, and the adjusting pin 25 can be moved and adjusted within the length of the slot 15. By tightening the nut 30b at an appropriate position, the adjustment needle stay 25 can be fixed to the fixed needle stay 13.

In the third embodiment shown in FIG. 6, a sliding portion 26 as guide means is provided on the fixed needle stay 13 in parallel to the cloth feeding direction, and the guide groove 14 into which the sliding portion 26 is loosely fitted is adjusted. Needle clasp 2
5, a hole 27 is formed in the sliding portion 26, a screw hole is provided in the opposite sliding portion (not shown), and a long hole 15 is formed in the guide groove 14, as in the first embodiment. Is formed.

In the embodiment shown in FIG. 6, the sliding portion 26 of the fixed needle 13 is loosely fitted in the guide groove 14 of the adjusting needle 25, and the fixing screw 30 is passed through the hole 27 through the elongated hole 15. By screwing into the screw hole of the opposite sliding portion (not shown) and loosening the fixing screw 30, the fixing between the adjusting pin 25 and the fixed pin 13 is released, and the adjusting pin 25 is inserted into the elongated hole 15. Can be adjusted within the range of the length, and the adjustment needle stay 25 can be fixed to the fixed needle stay 13 by tightening the fixing screw 30 at an appropriate position.

Further, as a method of moving and adjusting the adjustment needle 25 to the left and right, it is also possible to adjust the movement of the adjustment needle 25 by a small amount using an adjustment screw or the like. Next, a fourth embodiment will be described with reference to FIGS. Reference numeral 32 denotes a needle retainer, which is provided with a screw portion 11 fixed to a needle bar (not shown) at an upper end, and integrally formed with a support shaft 33 and a disk-shaped receiving portion 34 below.
As shown in FIG. 8, the support shaft 33 and the disc-shaped receiving portion 34 have a center axis that matches the center axis of the screw portion 11 and have a radius slightly larger than the diameter of the handle 18 of the sewing needle 17. As shown in FIG. 9, a groove 36 as a guide means having an arc 35 is provided so as to open to the side and the lower surface of the support shaft 33 and the disc-shaped receiving portion 34.

Numeral 37 designates a staple. The staple 37 has a hole 38 which is loosely fitted to the support shaft 33 of the staple 32 as shown in FIG.
As shown in FIG. 8, a female screw 40 for screwing a needle screw 39 serving as an engaging / disengaging means having a diameter smaller than the width of the groove 36 provided in the support shaft 33 is provided. Reference numeral 41 denotes a plate-like member having a constant thickness for adjusting the needle width of the sewing needle 17 and the hooking needle 29, and an adjusting body as needle width adjusting means.
9, a projection 42 which projects vertically as shown in FIG. 9 and is narrower than the width of the groove 36 as shown in FIG. 8, and which has a width slightly smaller than the diameter of the handle 18 of the sewing needle 17 extending in the horizontal direction. A wide bifurcated locking portion 43 and a vertical portion 4 extending below the locking portion 43
And 4 are integrally formed.

Numeral 45 is an L-shaped locking member made of a leaf spring, the upper part of which is fixed to the end face of the needle pin 37 by a screw 46, and is adjusted by a bifurcated portion 47 extending horizontally below as shown in FIG. The locking portion 43 of the body 41 is received by the receiving portion 34 by elastic force.
To the lower surface of. A plurality of adjusting bodies 41 having the same shape and different thicknesses are prepared in advance.

In the fourth embodiment, to adjust the distance between the sewing needle 17 and the hook needle 29, that is, the length L of the pinpoint saddle stitch, the length of the pinpoint saddle stitch is as follows. To minimize the length L, the needle screw 39 shown in FIGS.
The fixing of the handle 18 of the sewing needle 17, the protrusion 42 of the adjusting body 41, and the handle 18 a of the hooking needle 29, which has been pressed against the groove 35 by the tip of the handle, is released.

From this state, first, the handle 18 of the hook 29
a is pulled out downward, and then the locking portion 43 of the adjusting body 41 is pulled out from the forked portion 47 of the locking body 45, and the adjusting body 41 is removed. Next, the handle 18a of the hanging needle 29 is
As shown in the figure, the flat surface 19 of the handle 18 of the sewing needle 17 and the flat surface 19a of the handle 18a of the hanging needle 29 are inserted into the groove 36 so as to be in close contact with each other, and the needle screw 39 is tightened again. As a result, the flat surface 19 of the handle 18 of the sewing needle 17 and the hook 29
With the flat surface 19a of the handle 18a in close contact with the handle 18, the handle 18 of the sewing needle 17 is pressed against the arc 35 of the groove 35 to support the handle 18 of the sewing needle 17 and the handle 18a of the hooking needle 29. The pin 38 is fixed to the shaft 33, and the hole 38 of the pin 37 is fixed to the support shaft 33 of the pin 32 by the reaction force of the fixing.

The state shown in FIG. 10 is a state in which the sewing needle 17 and the hooking needle 29 are fixed closest to each other. When the sewing machine is driven in this state, the fixed needle clamp 13 is adjusted together with the needle bar (not shown). Needle clasp 25 moves up and down with sewing needle 17 and hooking needle 29, and these sewing needle 17 and hooking needle 29
As is well known, cooperates with a looper and a spreader to form a pinpoint saddle stitch by a sewing needle and a hooking needle which are arranged in parallel in the cloth feeding direction of the sewing machine, and the length of the pinpoint saddle stitch at this time. L is the shortest.

From the state where the needle interval between the sewing needle 17 and the hooking needle 29 in FIG. 10, that is, the length L of the pinpoint saddle stitch is the shortest, the needle interval between the sewing needle 17 and the hooking needle 29, that is, the pinpoint To make the length L of the saddle stitch longer, the following adjustment is made. When the needle screw 39 is loosened from the state of FIG. 10, the handle 18 of the sewing needle 17 pressed against the groove 35 by the tip of the needle screw 39 and the hook needle 29
The fixing by pressing against the handle 18a is released,
The needle screw 39 is slightly loosened.

From this state, first, the handle 18 of the hook 29
a is pulled out downward, and then the adjusting body 41 having a thickness equal to the length of the pinpoint saddle stitch is increased.
Is selected, the protrusion 42 of the adjustment body 41 is brought into close contact with the flat surface 19 of the sewing needle 17 and inserted into the groove 36 of the support shaft 33, and the locking portion 43 of the adjustment body 41 is engaged as shown in FIG. It is inserted into the forked part 47 of the stopper 45. Next, hook 18
After the handle 18a is inserted into the groove 36 of the support shaft 33 so that the flat surface 19a is in close contact with the protrusion 42 of the adjusting body 41 as shown in FIG. The sewing needle 17 and the hooking needle 29 are fixed to the support shaft 33 as described above.

Thus, the needle interval between the sewing needle 17 and the hooking needle 29 is widened by the thickness of the protrusion 42. In this state, when the pinpoint saddle stitch is formed, the length L of the pinpoint saddle stitch is reduced. Is longer by the thickness of the protrusion 42 than the length formed in the state of FIG. next,
A fifth embodiment will be described with reference to FIGS.

In this embodiment, the shapes of the adjusting member 41 and the locking member 45 in the fourth embodiment are modified, and the same parts as those in the fourth embodiment are described in the fourth embodiment. The same reference numerals as in the first embodiment denote the same parts, and a description thereof is omitted. As shown in FIG.
As shown in FIG. 3, the flat end face 19 provided on the handle 18 of the sewing needle 17 is slightly projected, and
1. A needle hole 20 having an axis coinciding with the center axis of the needle hole 1, an insertion groove 50 wider than the diameter of the needle hole 20, and the insertion groove 5
The same groove 36 as in the fourth embodiment, which communicates with the zero, is formed.
Numeral 51 is a plate-like member having a constant thickness for adjusting the needle width between the sewing needle 17 and the hooking needle 29, and is an adjusting body as a needle width adjusting means. As shown in FIG. A protruding part 52 having a width protruding upward and having a width capable of being inserted into the insertion groove 50.
And a locking portion 53 bent in an L shape below. Numeral 54 denotes an L-shaped locking body made of a leaf spring, the upper part of which is fixed to the end face of the needle pin 37 by a screw 55, and the lower part of FIG.
As shown in FIG. 2, it extends gently and bends downward to lock the locking portion 53 of the adjusting body 51 by elastic force.

A plurality of adjusting bodies 41 having the same shape and different thickness are prepared in advance. In this embodiment, as in the fourth embodiment, the protrusion 52 of the adjusting body 51 having a constant thickness as shown in FIG.
0, and the sewing needle 17 and the hook 2
9 is fixed, the needle interval between the sewing needle 17 and the hooking needle 29 is widened by the thickness of the protruding portion 52. When the pinpoint saddle stitch is formed in this state, the pinpoint
The length L of the saddle stitch becomes longer by the thickness of the protrusion 42.

Therefore, by selecting the adjusting members 51 having different thicknesses and fixing the sewing needle 17 and the hooking needle 29, a pinpoint saddle stitch having an arbitrary length can be formed. In order to form the shortest pinpoint saddle stitch, the needle screw 39 in FIG. 13 is loosened, and the adjusting body 51 is pulled out and removed.
The flat surfaces 19 and 19a of the handle between the hook 7 and the hook 29 are shown in FIG.
It is obtained by tightly contacting and fixing as shown in FIG.

[0034]

As described above, according to the present invention, in a sewing machine for forming a pinpoint saddle stitch, two holes 4 formed in the stitch 1 for adjusting the length L of the pinpoint saddle stitch. 5, there is no need to prepare a large number of needle stays 1 having different center-to-center dimensions, and it is not necessary to replace the needle stays 1 every time the pinpoint saddle stitch length L differs. Since it is not necessary to prepare a large number of sewing machines having different center-to-center dimensions of the two holes 4 and 5 at the interval between the sewing needle 2 and the hooking needle 3, sewing costs are reduced and sewing work efficiency is improved. This also has the effect of being able to respond to design requests from production clients and producers in various ways.

Also, the present invention provides a fixed needle stay fixed to a needle bar and supporting a sewing needle, an adjustment needle stay disposed behind the fixed needle stay in the cloth feeding direction and supporting a hanging needle, a fixed needle stay and an adjustment needle. A pair of guide grooves provided on one of the side surfaces of the buckle, a pair of sliding portions provided on a fixed needle buckle or an adjustment needle buckle not provided with the guide groove and loosely fitted in the guide groove, and the guide groove Or, the sliding portion is provided with a long hole parallel to the cloth feeding direction, and the sliding portion is loosely fixed to the guide groove by loosely penetrating the long hole, and is constituted by engaging and disengaging means capable of releasing the fixing. The length of the pinpoint saddle stitch can be freely selected without limitation, and the adjustment is simple, the sewing work efficiency is improved, the adjustment can be performed accurately, and the durability is excellent.

[Brief description of the drawings]

FIG. 1 is a side view of a staple of the first embodiment.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is a sectional view taken along the line BB of FIG. 1;

FIG. 4 is an exploded perspective view of the first embodiment.

FIG. 5 is a partially exploded perspective view of the second embodiment.

FIG. 6 is a partially exploded perspective view of the third embodiment.

FIG. 7 is a side view of the staple of the fourth embodiment.

FIG. 8 is an enlarged cross-sectional view taken along line CC of FIG. 7;

FIG. 9 is an exploded perspective view of the fourth embodiment.

FIG. 10 is an enlarged cross-sectional view taken along the line CC of FIG. 7 in a state where the needle width is the shortest in the fourth embodiment.

FIG. 11 is a side view of the staple of the fifth embodiment.

FIG. 12 is a right side view of FIG.

FIG. 13 is an enlarged sectional view taken along the line DD of FIG. 11;

FIG. 14 is a perspective view of an adjusting body according to a fifth embodiment.

FIG. 15 is an explanatory diagram of a pinpoint saddle stitch.

FIG. 16 is a perspective view of a conventional technique.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Needle retainer 2, 17 Sewing needle 3, 29 Hanging needle 10 Fixed needle retainer 14 Guide groove (Guiding means) 15 Slot (adjusting means) 24 Adjusting needle retainer 27 Sliding part 30 Screw (Disengaging means) 32 Needle Retainer 36 Groove (Guiding means) 36 Needle retainer 39 Needle retainer screw (Disengagement means) 41, 51 Adjusting body (Adjusting means)

Claims (4)

[Claims] 1. A sewing machine in which a pinpoint saddle stitch is formed by a sewing needle and a hooking needle arranged in parallel in a cloth feeding direction of a sewing machine in cooperation with a looper and a spreader. A needle width adjusting mechanism for a sewing machine, comprising a needle width adjusting means for adjusting a needle width in a cloth feeding direction of the sewing machine. 2. A needle width adjusting mechanism for a sewing machine according to claim 1, wherein the needle width adjusting means is capable of adjusting a hook needle with respect to a sewing needle in a cloth feeding direction of the sewing machine. 3. A fixed staple fixed to the needle bar and supporting the sewing needle, an adjustment staple disposed rearward of the fixed staple in the cloth feeding direction and supporting the hanging needle, and a fixed staple and the adjustment staple. A needle width adjustment for a sewing machine, comprising: guide means provided between the guide means for guiding the adjusting needle stay parallel to the cloth feeding direction; and engaging / disengaging means capable of fixing and releasing the guide means and the fixed needle stay. mechanism. 4. A fixed staple fixed to a needle bar and supporting a sewing needle, an adjustment staple disposed rearward of the fixed staple in the cloth feeding direction and supporting a hanging needle, and a fixed staple and an adjustment staple. A pair of guide grooves provided on one of the side surfaces, a pair of sliding portions provided on a fixed needle or an adjustment needle which does not have the guide groove, and a pair of sliding portions which loosely fit into the guide grooves; A slot parallel to the cloth feeding direction provided on the portion, and engaging and disengaging means capable of loosely penetrating the slot and fixing and releasing the sliding portion from the guide groove. Needle width adjustment mechanism of the sewing machine.