JPS594628Y2 - Sewing machine processing cloth guide device - Google Patents

Description

[Detailed description of the invention] Technical field This invention relates to a work cloth guide device for a sewing machine, and in particular to a work cloth guide device used when sewing two work cloths with parallel stitches along their side edges. It is related to.

Purpose The purpose of this invention is to adjust the gap between the three guide plates for accommodating the two pieces of work cloth in accordance with the change in the right bank of the work cloth, even if the right bank of the two work cloths to be sewn changes significantly. To provide a novel workpiece cloth guide device for a sewing machine, which can largely change settings and can smoothly and accurately guide and move any workpiece cloth on the right bank toward a seam forming point.

EXAMPLE Hereinafter, an example of this invention will be explained according to the drawings.
In the drawing, 1 is an arm of the sewing machine, 2 is a needle bar supported on the arm 1 so as to be able to reciprocate vertically, 3 is a needle attached to the lower end of the needle bar 2 and serves as a seam forming point, and 4 is a needle on the arm 1. A presser foot is supported so as to be able to move up and down, 5 is a presser foot attached to the lower end of the presser bar 4, 6 is a bed of the sewing machine, 7 is a throat plate attached to the bed 6, and 8 is also attached to the bed 6. An attached sliding plate cooperates with the bed 6 and throat plate 7 to form a work cloth support surface 9 on their upper surfaces.

Reference numeral 10 denotes a feed dog that performs a well-known four-feed motion, and is a fabric feeding device that cooperates with the presser foot 5 to feed two work cloths 11 and 12 in one direction on the work fabric support surface 9. is stealing.

Reference numerals 13, 14, and 15 denote three guide plates arranged on the work cloth support surface 9 on the cloth feeding side of the cloth feeding device, and each of which can separately accommodate two sheets of work cloth 11 and 12 to be sewn. The top and bottom are superimposed like this.

16 is a pair of female screws (L17) for attaching a ruler etc. provided on the bed 6 as shown in Figs.
A planar track-shaped mounting plate 19 is fixed to the upper surface of the bed 6 by means of mounting screws 18 so as to extend in a direction perpendicular to the fabric feeding direction line passing through the stitch forming point of the needle 3. , an elongated hole formed at the rear end of the lower guide plate 13 of the three guide plates, and loosely fitted into the mounting plate 16;
In cooperation with the mounting plate 16, the lower guide plate 13 is held on the work cloth support surface 9 so that its movement can be adjusted only in a direction perpendicular to the cloth feeding direction line.

Reference numeral 20 denotes a transparent auxiliary guide whose elongated fitting hole 20a is fitted into the mounting plate 16 and which is disposed on the upper surface of the rear end of the lower guide plate 13 so as to be movable in a direction perpendicular to the cloth feeding direction line. These plates are designed to prevent the work cloth 11° 12 from lifting up between the rear ends of the three guide plates 13, 14, 15 and the presser foot 5.

Reference numeral 20b denotes a change plate that is removably fitted into the recess 20C on the auxiliary guide plate 20, and a long hole 20d that fits into the mounting plate 16 is formed on the negative side of the change plate. , by changing the attachment state of this changing plate 20b to the recess 20C from side to side, the attachment position of the auxiliary guide plate 20 can be changed from side to side, and the attachment position of the auxiliary guide plate 20 can be changed from side to side without interfering with this auxiliary guide plate 20. The presser foot 5 can be attached to the presser rod 4.

Numeral 21 is a fixing screw screwed into the mounting plate 16 from above the change plate 20b, and is used to place the auxiliary guide plate 20 at a predetermined position on the bed 6 and to move the lower guide plate 13 to the desired adjustment position on the bed 6. It is designed to be fixed in position at the same time.

22 is a scale provided on the upper surface of the rear end of the lower guide plate 13, as shown in FIGS. When adjusting the movement in a direction perpendicular to the line, by selectively making the scale 22 correspond to this indicator 23, a desired seam allowance can be obtained.

24 is No. 1.3. As shown in Fig. 4, the guide body is fixed on the lower guide plate 13 by a pair of mounting screws 25 on one side of the fabric feed direction line passing through the stitch forming point of the needle 3, and The side facing the feed direction line engages with the side edges 11 a, 12 a of the work cloth 11 , 12 introduced between the respective guide plates 13 , 14 , 15 to form seams between those side edges. A guide surface 24a is formed to guide the object to the point.

Reference numerals 26 and 27 denote notches that are formed in the middle and upper guide plates 14 and 15 of the three guide plates to avoid the guide body 24, and are opened toward the rear. .

As shown in Figs. 1.3, 6, 7, and 8, 28 is provided with a downward guide by means of two mounting screws 29 on the side opposite to the double feed direction line passing through the seam forming point by sandwiching the guide body 24. Board 13
A pair of supports are fixed at a distance above each other, and an elongated through hole 28a extending in the vertical direction is formed in the middle portion thereof, as shown in FIGS. 2 and 4.

A cover plate 30 is fixed to the upper surface of the guide body 24 and both supports 28 with three mounting screws 31.

Reference numeral 32 denotes a first support pin that is integrally fixed to the upper end surface of the intermediate guide plate 14 by brazing or the like so as to extend parallel to the double feed direction line; , as shown in FIG.
a, and are loosely fitted in the respective portions so as to be movable in the vertical and horizontal directions.

Reference numeral 33 denotes a long hole 33a extending in the vertical direction, and is attached to the right side of the outer surface of both supports 28 by a pair of mounting screws 34 through a long hole 33a extending in the vertical direction, so that the front surface can be adjusted in the vertical and horizontal directions, and has a roughly L-shape. A pair of first mounting plates, a part of which has a support hole 33b into which both ends of the first support pin 32 are inserted to rotatably support the intermediate guide plate 14. It is formed.

35 also extends parallel to the double feed direction line,
A second support pin is integrally fixed to the upper surface of the end of the upper guide plate 15 by brazing, etc.
As shown in FIG. 8, both ends are loosely fitted into the through holes 28a of both supports 28 so as to be movable in the vertical and horizontal directions.

Reference numeral 36 denotes a vertically extending long hole 36a, which is attached to the left side of the outer surface of both supports 28 by a pair of mounting screws 37 through a long hole 36a extending in the vertical direction. A pair of second mounting plates, a part of which has a support hole 36b into which both ends of the second support pin 35 are inserted to rotatably support the upper guide plate 15. It is formed.

Therefore, by moving the mounting positions of the first and second mounting plates 33.36 relative to both supports 28 in the vertical direction, the positions of the first and second support pins 32.35 are moved in the same direction. , the gap between the intermediate guide plate 14 and the lower guide plate 13 and the gap between the upper guide plate 15 and the intermediate guide plate 14 can be largely changed.

Therefore, if the gap between each guide plate 13, 14, 15 is arbitrarily adjusted by adjusting the vertical position of the first and second mounting plates 33, 36 according to the right bank of the work cloth 11, 12, Any work cloth on the right bank can be guided and moved smoothly and accurately toward the seam forming point.

In this embodiment, as shown in FIGS. 2 and 6, the upper edges of the first and second mounting plates 33, 36 are configured to face the lower surface of the cover plate 30 at a predetermined interval. , the upward movement of the first and second mounting plates 33 and 36 is regulated by engagement with the cover plate 30.

Also, the first and second mounting plates 3 for both the supports 28
3. By moving the mounting position of 36 in the left and right direction perpendicular to the double feed direction line, the second and second support pins 32
．． 35 is moved in the same direction, and the end faces 26 of the cutouts 26, 27 formed in the middle and upper guide plates 14.15
The relative positional relationship between 27 a and the guide surface 24 a of the guide body 24 provided on the lower guide plate 13 can be adjusted.

Therefore, as shown in Fig. 4, the intermediate and upper guide plates 1
4.15 is in the lowered state, the notch 26.
The end surfaces 26a and 27a of 27 are the guide surfaces 24 of the guide body 24.
If you adjust and set it so that it comes into contact with a, each guide plate 1
3. The side edges 11a, 12a of the work cloth 11.12 introduced between 14° and 15° are the end faces 26a of the notches 26.27.
, 27a and the guide surface 24a of the guide portion body 24, which can prevent the possibility of interfering with the guiding operation of the work cloth.

Furthermore, in this embodiment, when the intermediate and upper guide plates 14.15 are in the lowered state shown in FIG.
, 27a and the guide surface 24a of the guide body 24, the intermediate and upper guide plates 14 and 15 are moved up and down as shown in FIG. When moved, the end surfaces 26a, 27a and the guide surface 2
4a, so that the rotation of the intermediate and upper guide plates 14 and 15 is not hindered.

38 and 39 are formed protruding from the lower surfaces of the ends of the intermediate and upper guide plates 14 and 15 so as to be located on the opposite side of the guide body 24 across the double feed direction line passing through the stitch forming point of the needle 3. a pair of pressing pieces, which press the work cloths 11 and 12 at one point to apply rotational motion to each work cloth when the work cloths 11 and 12 are transferred by the double feeding device;
The side edges 11a, 12a of the work cloth are engaged with the guide surface 24a of the guide body 24.

In short, these pressing pieces 3B and 39 function as described above between the lower guide plate 13 and the intermediate guide plate 14 and between the intermediate guide plate 14 and the upper guide plate 15. Well, the configuration can be changed arbitrarily.

Reference numeral 40 denotes a first adjustment screw for finely changing and setting the gap between the intermediate guide plate 14 and the lower guide plate 13, and as shown in FIGS. Threaded portion 4 whose tip can engage with the upper surface of the lower guide plate 13
0a, a shaft portion 40b whose outer periphery is knurled, and a knob portion 40C.

Reference numeral 41 denotes a locking spring plate fixed to the upper surface of the intermediate guide plate 14, which engages with the shaft portion 40b of the first adjustment screw 40 to adjust the first adjustment screw 40 to a predetermined value. It is meant to be held in place.

42 is a second adjustment screw for finely changing and setting the gap between the upper guide plate 15 and the intermediate guide plate 14, as shown in Fig. 3.4.9. 15 and whose tip can engage with the upper surface of the intermediate guide plate 14, and a shaft portion 42 whose outer periphery is knurled.
b, and a knob 42C.

Reference numeral 43 denotes a locking spring plate fixed to the upper surface of the upper guide plate 15, which engages with the shaft portion 42b of the second adjustment screw 42 to adjust the second adjustment screw 42 to a predetermined value. It is meant to be held in place.

Reference numeral 44 denotes a supporting leg projecting from the upper surface of the rear end of the cover plate 30, and a screw shaft 45 is fixed to the lower surface thereof as shown in FIG. 1.4.9.

46 is an adjustment nut rotatably screwed onto the screw shaft 45; 47 is a spring pressure protruding from the upper surface of the upper guide plate 15; 48 is an adjustment nut interposed between the adjustment nut 46 and the spring pressure 47; A compression spring is installed as a biasing means, which presses the upper and intermediate guide plates 15, 14 toward the lower guide plate 13 by the spring pressure adjusted by the adjusting nut 46, and is always The guide plates 15 and 14 between the upper and one side are
It is designed to be held in the lowered state shown in the figure.

Reference numeral 49 denotes an upper guide plate 1 behind the compression spring 48.
5 is a roughly L-shaped engagement plate fixed to the upper surface of the rear end by brazing or the like, and the second support pin 35 is attached to the upper part of the engagement plate as shown in FIGS. A slanted wall 49a is formed so as to become gradually lower as it moves away from the slanted wall 49a.

50 is a support rod fixed to the presser rod 4; 51 is a substantially crank-shaped lifting rod attached to the tip of the support rod 50 with a mounting screw 52;
As shown in FIG. 10, as the presser rod 4 rises, the lifting rod 51 is raised via the support rod 50, and is activated. The engagement between the portion 51 a and the inclined wall 49 a of the engagement plate 49 causes the upper guide plate 15 to rotate upwardly against the action of the compression spring 48 .

Note that 53 is a guide piece made of nylon resin or the like fixed to the lower surface of the rear end of the cover plate 30 so as to be in sliding contact with the lifting rod 51.

A screw 54 is rotatably screwed into the upper guide plate 15 so as to sandwich the second support pin 35 and be located on the opposite side of the cloth feeding direction line passing through the stitch forming point of the needle 3. It is a rod, and as shown in FIG. 4, the outer periphery of its shaft portion is knurled.

55 is a locking spring plate fixed to the upper surface of the upper guide plate 15 as shown in FIG. It is designed to be held in the adjusted position.

When the upper and intermediate guide plates 15.14 are in the lowered state as shown in FIG. When the upper guide plate 15 is rotated upward via the support rod 50 and the lifting rod 51 as the presser rod 4 rises, the lower end of the threaded rod 54 is adjusted to form a gap. After a frontage strike motion is generated until it comes into contact with the guide plate 14, the intermediate guide plate 14 is rotated upward.

Reference numeral 56 indicates each guide plate 1 as shown in FIGS. 1 and 10.
3.14.15 A detector mounted on the arm 1 of the sewing machine, comprising a light emitter and a light receiver, for detecting the presence of the work cloth 11.12.

Reference numerals 57 and 58 indicate through holes formed in the intermediate and upper guide plates 14 and 15 corresponding to the detector 56, and 59 a reflector plate provided on the lower guide plate 13 in correspondence with those through holes. It is.

Therefore, the work cloth 11.1 is placed between each guide plate 13.14°15.
2 is not present, the light from the light projector of the detector 56 reaches the reflection plate 59 via the through holes 5B and 57, is reflected by the reflection plate 59, and then passes through the same path to the detector 56. Leads to the receiver.

The operation of the work cloth guide device of the sewing machine constructed as described above will now be described.

Now, as shown in FIG. 10, with the upper and intermediate guide plates 15.14 being lifted and rotated by the lifting of the presser bar 4, two pieces of work cloth 11 are placed between each guide plate 13, 14, 15. ,1
2 separately, and their side edges 11 a, 12 a
When engaged with the guide surface 24 a of the guide body 24 , the work cloth 11 . The set state of the cloths 11 and 12 is detected.

Thereafter, when the start switch of the sewing machine is operated, the presser foot bar 4 is lowered and the presser foot 5 is moved to a lower operating position.

As the presser bar 4 is lowered, the lifting rod 51 is also lowered via the support rod 50, so that the lifting of the upper guide plate 15 by the operating portion 51H of the lifting rod 51 is released, and the upper and intermediate The guide plate 15.14 is rotated downward around the support pin 35.32 by the action of the compression spring 4B,
The pressing pieces 39,38 respectively engage the work cloths 12.11 and press each work cloth 12.11 at one point.

After that, the operation of the sewing machine is automatically started and sewing is performed.

During this sewing, a feeding force is applied to the workpiece cloth 11° 12 by the cloth feeding device consisting of the presser foot 5 and the feeding dog 10, and rotational force is applied by the action of the pressing pieces 33 and 39. In order to
, 12a are smoothly and accurately transferred toward the stitch forming point of the needle 3 while contacting and engaging with the guide surface 24a of the guide body 24, and the stitches are automatically formed along the side edges 11a and 12a. It is formed.

When the work cloth 11, 12 is fed out from between the guide plates 13, 14 and 15, the condition is detected by the detector 56, and the operation of the sewing machine is stopped for a while, and the presser foot 4 is raised to remove the cloth. The presser foot 5 is moved upward to a non-working position.

When the presser bar 4 is raised as described above, the lifting rod 51 is also raised via the support rod 50, and as shown in FIG. a, the upper guide plate 15 is engaged with the compression spring 48.
The second support pin 35 is rotated upward by 2" against the action of the second support pin 35.

Then, after a lost motion occurs due to the upward rotation of the upper guide plate 15, the lower end of the screw rod 54 comes into contact with the intermediate guide plate 14, so that the intermediate guide plate 14 moves through the screw rod 54. It is rotated upward around the first support pin 32.

Therefore, the distance between each guide plate 13, 14, 15 is widened, and the work cloth 11, 12 to be sewn next can be easily introduced.

In addition, in this workpiece cloth guide device, when sewing workpiece cloths 11 and 12 whose right banks are significantly different from those in the previous sewing operation, the lower guide plate 13'' and the pair of supports 2B are used.
By vertically moving and adjusting the mounting positions of the first and second mounting plates 33 and 36 relative to the first and second support pins 32.35 on the intermediate and upper guide plates 14.15.
are moved in the same direction, and the gap between the intermediate guide plate 14 and the lower guide plate 13 and the gap between the upper guide plate 15 and the intermediate guide plate 14 are greatly changed.

Therefore, if the gaps between the respective guide plates 13, 14, and 15 are arbitrarily adjusted and set by adjusting the vertical positions of the first and second mounting plates 33 and 36 according to the right bank of the work cloth 11 and 12, Even workpiece fabrics 11, 12 with significantly different right banks are guided smoothly and accurately towards the seam forming point, and seams are automatically formed along their side edges 11a, 12a.

Note that the gaps between each of the guide plates 13, 14, and 15 are as follows.
Fine setting changes can also be made by rotating and adjusting the second adjustment screws 40 and 42.

Therefore, when sewing a workpiece cloth whose right side is slightly different from that in the previous sewing operation, the first and second adjustment screws 40.42 are rotated to adjust the angle of each guide plate 13.14°. 1
The gap between 5 can be easily changed.

Furthermore, the ratio of the gap between the upper guide plate 15 and the intermediate guide plate 14 and the gap between the intermediate guide plate 14 and the lower guide plate 13 when the upper and intermediate guide plates 15 and 14 are rotated upward is as follows: Settings can be easily changed by rotating and adjusting the screw rod 54 provided on the upper guide plate 15.

This is advantageous when sewing thick cloth and thin cloth.

Furthermore, in this work cloth guide device, notches 2B and 27 formed in the intermediate and upper guide plates 14 and 15 are provided.
The relative positional relationship between the end surfaces 26 a, 27 a of the guide plate 13 and the guide surface 24 a of the guide body 24 provided on the lower guide plate 13 is adjusted to correct errors in processing and assembly of each part. In this case, as shown in FIGS. 3 and 4, with the middle and upper guide plates 14,15 lowered, the lower guide plate 13
The first and second mounting plates 3 for the upper pair of supports 28
3. By adjusting the mounting position of 36 in the left and right direction perpendicular to the cloth feeding direction line, the intermediate and upper guide plates 14
．． The positions of the first and second support pins 32.35 on 15 are moved in the same direction, and the end face 26 of said notch 26.27
a, 27a can be easily and reliably adjusted to a state where they are in contact with the guide surface 24a of the guide body 24.

Therefore, if the sewing work is performed in this state as described above, the work cloth 11.1 introduced between each guide plate 13, 14.15
The side edges 11a and 12a of 2 are the end surfaces 26 of the notches 26 and 27.
a, 27a and the guide surface 24a of the guide body 24, and the side edges 11a, 12a of the work cloth 11.12 are smoothly guided by the guide surface 24a, thereby preventing any interference. You can perform sewing work without any problems.

In addition, when adjusting the distance from the side edges 11a, 12a of the work cloth 11.12 to the seam, that is, the seam allowance,
After loosening the fixing screws 21, remove the three guide plates 13.14.1
5 etc. is moved along the mounting plate 16 on the bed 6 in a direction perpendicular to the cloth feeding direction line, and the desired seam allowance scale 22 on the lower guide plate 13 is moved to the mark 23 on the bed 6.
The fixing screw 21 may be tightened in accordance with the above.

At this time, the relative positional relationship of the engagement plate 49 on the upper guide plate 15 with respect to the operating portion 51a of the lifting rod 51 changes, and the operating portion 51a of the lifting rod 51 and the intermediate and upper guide plate 1
4.15 rotation center of the first and second support pins 32
．． 35, the amount of rise of both guide plates 14 and 15 would normally change, but in this embodiment, the engaging plate for the actuating portion 51a of the pull-L rod 51 changes. 49 is an inclined wall 49a that gradually becomes lower as it moves away from the second support pin 35, the amount of rise of the upper and middle guide plates 15, 14 is always constant regardless of the seam allowance adjustment of the guide device. This makes it possible to easily set the work cloths 11, 12 between the respective guide plates 13, 14, 15.

Note that this invention is not limited to the configuration of the above-mentioned embodiment, and for example, a second mounting means for supporting the upper guide plate may be provided on the intermediate guide plate, etc., without departing from the spirit of this invention. It is also possible to arbitrarily change the configuration of each part within the range.

Effects As detailed above, this invention supports the intermediate and upper guide plates by the first and second mounting means so as to be rotatable about one axis that is parallel to the cloth feeding direction line and independent of each other. Since the structure is such that the support axes of these can be adjusted in the vertical direction, even if the frost thickness of the work cloth changes greatly, the gap between each guide plate can be changed significantly according to the change in the right bank of the work cloth. This provides an excellent effect in that work cloth of any frost thickness can be smoothly and accurately guided toward the seam forming point.

[Brief explanation of the drawing]

Fig. 1 is a partial plan view of a sewing machine showing the installation state of a work cloth guide device embodying this invention, Fig. 2 is a partial front view of the same, and Fig. 3 shows a cover plate of the work cloth guide device of Fig. 1. FIG. 4 is a sectional view taken along line 4-4 in FIG. 1, FIG. 5 is a sectional view taken along line 5-5 in FIG. 1, and FIG. 6 is a partial plan view showing the removed state. is a cross-sectional view taken along line 6-6 in Figure 1, Figure 7 is a partial cross-sectional view taken along line 7-7 in Figure 2, and Figure 8 is a partial cross-sectional view taken along line 8-8 in Figure 2. 9 is a sectional view taken along the line 9--9 of FIG. 1, and FIG. 10 is a sectional view showing the operating state of FIG. 4. Sewing machine arm 1, needle 3, presser foot 4, presser foot 5, sewing machine bed 6, work cloth support surface 9, feed dog 10 (above 5,
10 etc. constitute a cloth feeding device), processed cloth 1
1.12, side edges 11 a, 12 a, guide plates 13, 1
4.15, guide body 24, guide surface 24a, support body 28,
First support pin 32, first mounting plate 33 (32.3 above)
3 etc. constitute the first attachment means), a second support pin 35, a second attachment plate 36 (the above-mentioned 35, 36 etc. constitute the second attachment means), and a biasing means. compression spring 4B.

Claims (1)

[Scope of Claim for Utility Model Registration] 1. A cloth feeding device (5, 10, etc.) for feeding the work cloth 11, 12 on the work cloth support surface 9 through the seam forming point; etc.) are placed on the work cloth support surface 9 on the cloth feeding side, and three guide plates 13., 13. 14.15 and the lower guide plate 1 of those guide plates 13.14.15
3 and introduced between each guide plate 13, 14, 15 on one side of the fabric feeding direction line passing through the seam forming point.
Side edges 11a of pieces of work cloth 11.12. 12a and a guide surface 24a for guiding the side edges 11a, 12a to the seam forming point; and the intermediate guide plate 14 and the lower guide plate 13. The intermediate guide plate 14 is rotatable around a single axis parallel to the cloth feed direction line on the side opposite to the cloth feed direction line passing through the seam forming point while sandwiching the guide body 24. a first mounting means (32, 33, etc.) that supports and can adjust its axis to move up and down; the upper guide plate 15 and the intermediate or lower guide plate 14;
．． 13, the upper guide plate 15 is parallel to the cloth feed direction line on the side opposite to the cloth feed direction line passing through the seam forming point while sandwiching the guide body 24. (32, 33, etc.) rotatably supported around one axis independent of the support axis of the second mounting means (35, 36, etc.), which is capable of moving and adjusting the axis up and down; Provided between the lower guide plate 13 and the upper guide plate 15, the upper and intermediate guide plates 15 and 14 are connected to the lower guide plate 1.
3. A workpiece cloth guide device for a sewing machine, characterized in that it is provided with biasing means (48, etc.) for biasing toward the direction of the sewing machine. 2. When the work cloth 11.1 is transferred by the cloth feeding device (5, 10, etc.), the work cloth 11.
2 and imparts a rotational motion to the work cloth 11.12 to form a side edge 11a of the work cloth 11.12. 12a to engage with the guide surface 24a of the guide body 24, between the upper guide plate 15 and the intermediate guide plate 14 and between the intermediate guide plate 14 and the lower guide plate 13. A work cloth guide device for a sewing machine according to claim 1, wherein pressing pieces 39 and 38 are respectively provided at the sides. 3 Setting means (42, 4
0, etc.) A work cloth guide device for a sewing machine according to claim 1 or 2 of the utility model registration claim. 4 said first and second attachment means are connected to said upper and intermediate guide plates 15.14 so as to constitute their support axes;
Claims 1 or 3 include support pins 35 and 32 provided integrally with the utility model, respectively, and the support pins 35 and 32 are movable and adjustable relative to the lower guide plate 13. The workpiece cloth guide device of the sewing machine according to item 2. 5. Utility model registration claim 1, which includes actuating means (50 to 53, etc.) for upwardly rotating the upper and intermediate guide plates 15, 14 against the action of the biasing means (48, etc.) A work cloth guide device for a sewing machine according to any one of items 1 to 4.