JPH08206381A - Cloth guiding device of sewing machine - Google Patents

Abstract

PURPOSE: To improve the quality of sewing by giving a tension by a tension giving means always equally in the width direction of upper cloth. CONSTITUTION: Upper cloth is set in an upper cloth part B, and the position is adjusted so that the positions of the two stitches corresponding to the upper cloth at the fall point of the needle of a sewing machine may be balanced on both sides. That is, screws 21a and 21a are loosened, and an attachment 21 is shifted in the direction of an arrow, making use of slots 21 and 21, so as to adjust the position, the position of the attachment 1 is fixed by tightening the screws 21a and 21a. In this work, since upper cloth B and a tension-giving means C are mounted respectively to the attachment 1, the relation of the relative position of both B and C does not change. Accordingly, the point of abutment on the press plate of a globular part 9a in the tension-giving means C is kept at the center shaft as set, and at the end of the press plate, equal pressure is added to the upper cloth, and the width of the turn part can be equalized.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cloth guide device for gradually bending both ends of an upper cloth as the sewing machine is driven and stitching it to a lower cloth which is sent to a sewing machine stitching section.

[0002]

2. Description of the Related Art As a cloth guide device for stitching a tape-shaped upper cloth, for example, a front cloth of a shirt or the like to a lower cloth which is a shirt body, there are those shown in FIGS. This cloth guide device is installed on the bed of a two-needle sewing machine
Is sometimes sewn to the body together with the interlining, and has the following configuration.

That is, in the figure, reference numeral 1 is a mounting body, which is installed via a long hole 21 on the upper surface of a sewing machine bed (not shown) so that its position can be adjusted, and a lower cloth portion A is fixed to the side. As shown in FIG. 5, the lower cloth portion A includes a base portion 2 and the base portion 2
And a bent portion 2a having a lower cloth passage 2b for bending one end of the lower cloth. B
Is an upper cloth portion fixed to a support plate 3 which is installed in the mounting body 1 by a long hole and a screw 3b so as to be positionally adjustable. As shown in FIGS. 6 and 8, the upper cloth portion B is provided with an upper cloth passage R1 in which both ends of the upper cloth 12 are sequentially bent inward and downward, and is directed from one end at a predetermined height position to the needle drop point of the sewing machine. The upper cloth guide 4 and the pressing plate 6, the cloth receiving plate 7, and the interlining guide 8. The pressing plate 6 is provided on the lower surface of the upper cloth guide 4, one end of which is supported above the upper cloth guide 4 as shown in FIG. Facing above the tip of the. Then, the cloth receiving plate 7 is fixed to the upper cloth guide 4, and the flat portion 7a is provided above.
Is provided along the inclined portion of the upper cloth guide 4, and its tip is located in front of the needle drop point of the sewing machine. The upper part of the interlining guide 8 of the interlining 8a below the cloth receiving plate 7 is fixed to the lower surface of the cloth receiving plate 7, and the lower end is fixed to the upper cloth guide 4 as shown in FIG. Is formed. An insertion opening 8a is provided at the upper end of the interlining guide 8, and the inserted interlining is bent at a substantially right angle so that the interlining passage R
You will be guided to 2.

Reference numeral C denotes a tension applying means for applying a tension to the upper cloth moving from the vicinity of the outlet of the upper cloth guide 4 to the point just before the needle drop point, which is fixed to the mounting body 1 and has a pressure generating lever 9 and a spherical portion 9a. It comprises a biasing spring 9b, a vertical wall surface 9c and the like. The central portion of the pressure generating lever 9 is rotatably supported by a vertical screw on the vertical wall surface 9c, and the upper cloth guide 4 is attached to the tip thereof.
A spherical portion 9a which can be brought into contact with and separated from the upper surface of the pressing plate 6 is provided through the hole portion 4a.

As shown in FIG. 9, the above-mentioned cloth guide device is arranged in front of the needle drop point of the two-needle sewing machine, and first, the lower cloth passage 2b.
The end edge of the lower cloth 10 is inserted into the interlining 11, and the interlining 11 is inserted into the interlining passage R2 from the insertion opening 8a. Further, the upper cloth 12 is inserted into the upper cloth passage R1 from the flat portion 7a. Interlining 11,
As shown in FIG. 9, when each tip of the lower cloth 10 is pulled out to the lower surface of the presser foot of the sewing machine stitching portion, the upper cloth 12 and the lower cloth 10 pass through their respective passages and end as shown in FIG. Are bent and the interlining 11 is sandwiched inside them, and the seams 14, 14 are formed at predetermined positions. At this time, the pressure generating lever 9 bends the tip 6a of the pressing plate 6 downward by the spherical portion 9a at the tip by the action of the biasing spring 9a, and the tip 6a of the pressing plate 6 and the tip 7a of the upper cloth receiving plate 7 are separated. The upper cloth 12 is sandwiched between them as shown in FIG. By the way, it is important to set the contact point of the spherical portion 9a with the pressing plate 6 at the center of the pressing plate 6 in the width direction. This is because if the contact point of the spherical portion 9a shifts to either the left or right of the center, the folded back (bent portion) widths at both ends of the upper cloth become uneven on the left and right. That is, when the spherical portion 9a deviates from the center, the folded width on the side of the upper cloth on which the load by the pressing plate 6 is heavily applied becomes large, and the folded width on the other side becomes small.

Next, when sewing is performed using the above-mentioned cloth guide device, it is necessary to perform an adjusting operation for properly establishing the positional relationship between the device and the needle drop point before the operation. In other words, the finish width of the upper cloth varies in size, but the left and right seam positions of the two-needle sewing machine must always be balanced, regardless of the size of this size, and therefore the position adjustment work described above is essential. . In this adjustment work, first, in FIG. 5, the elongated hole 21 of the mounting body 1 is used to move the mounting body 1 to the left or right in the direction perpendicular to the stitches, and the needle drop portion on the end side of the lower cloth is determined. Next, the position of the upper cloth portion B is adjusted in the same manner as described above using the elongated holes 3a and the screws 3b in the support plate 3 to determine the position where the left and right stitches of the double needle on the upper cloth are balanced.

When the sewing machine is driven in this state, the upper cloth 12, the interlining 11, and the lower cloth 10 are fed to the right side in FIG.
The stitches 3 and 13 are sewn like a seam 14. By the way, since the upper cloth 12 is clamped by the action of the tension applying means C between the tip of the pressing plate 6 and the tip of the upper cloth receiving plate 7 before the needle drop point of the sewing machine, tension is applied to the upper cloth 12. Since it is placed at the needle drop point in the state where the mark is applied, it is possible to prevent the generation of wrinkles and the like and realize a good quality of the sewn product.

[0008]

However, in the above-described conventional cloth guide device, the following inconvenience may occur. That is, when the position of the upper cloth portion B is adjusted in accordance with the size of the upper cloth, the contact point of the spherical portion 9a in the tension applying means C with the pressing plate 6 deviates from the center of the pressing plate 6 to the left or right. There are cases. For this reason, as described above, a phenomenon such as so-called cloth misalignment in which the folded width of the upper cloth is uneven on the left and right occurs, and a predetermined quality of the sewn product cannot be obtained. For this reason, it is conceivable that the tension applying means is not fixed to the mounting body 1 and the position can be adjusted with respect to the mounting body 1, but then, as preparation for the sewing work, the lower cloth portion A and the upper cloth portion B are prepared. The complicated and complicated work of adjusting the respective positions of the tension applying means is required, which not only causes a reduction in sewing efficiency, but also makes the structure of the cloth guiding device itself complicated and increases the number of parts. Furthermore,
In the above-mentioned conventional cloth guide device, when the upper cloth to be sewn is thin, the width of the upper cloth part that is evenly folded back at both ends is folded back while the upper cloth is moved to the needle drop point. Fluctuates and the folded width becomes non-uniform on the left and right, causing the inconvenience of the so-called cloth misalignment phenomenon described above, which causes a sewing failure.

[0009]

SUMMARY OF THE INVENTION The present invention provides a cloth guide device for folding back both edges of a tape-shaped upper cloth and suturing the lower cloth with a two-needle sewing machine. An upper cloth portion which is bent to guide the upper cloth in the needle drop direction of the sewing machine, a lower cloth portion which guides the lower cloth sewn to the upper cloth in the needle drop direction, the upper cloth portion and the lower cloth portion. The upper cloth part is fixed to the mounting body, and the upper cloth part is fixed to the mounting body and the lower cloth is fixed to the mounting body. The portion is provided with a position adjusting means for the attachment body, and the attachment body is provided with a position adjustment means for the attached portion, or alternatively, both side edges of the upper cloth are gradually bent in the needle drop direction in the sewing machine. The upper cloth part that guides the upper cloth and the upper cloth In a cloth guide device having a lower cloth part for guiding the lower cloth in the needle drop direction, in order to make the widths of the bent parts at both ends of the upper cloth uniform between the upper cloth part and the sewing part of the sewing machine. By configuring with the regulation plate of
An object of the present invention is to solve the above-mentioned conventional problems.

[0010]

In the present invention, both the tension applying means and the upper cloth portion are fixed to the mounting body while maintaining a positional relationship in which the tension by the tension applying means is always applied uniformly in the width direction of the upper cloth. On the other hand, since the mounting body and the lower cloth portion are provided with separate position adjusting means, the position adjustment of the lower cloth portion and the upper cloth portion can be carried out separately as in the conventional case, and the upper cloth portion can be adjusted separately. Since the positional relationship between the upper cloth portion and the tension applying means does not change even when the position is adjusted, the tension by the tension applying means is always applied uniformly in the width direction of the upper cloth, and good sewn product quality can be realized. Further, in the invention of the present application, the regulation plate provided near the outlet of the upper cloth portion holds the folded portions formed on both edges of the upper cloth while keeping the uniform width while passing through the upper cloth portion. It has a function of guiding the cloth in the needle drop direction, and is particularly effective when the upper cloth is a thin material.

[0011]

Embodiments of the present invention will be described with reference to the drawings.
1 to 4 are views showing an embodiment of the invention according to claim 1. The same parts as or corresponding parts to those in the conventional example are designated by the same reference numerals, and a duplicate description will be omitted. FIG. 1 is a perspective view of a cloth guide device when a front (upper cloth) of a shirt or the like is sewn to a shirt body (lower cloth) with a two-needle sewing machine. This device is installed on the sewing machine bed in front of the needle drop point in the cloth feeding direction. In the figure, reference numeral 1 is a mounting body which is the base of the device and is made of a flat metal material. The mounting body 1 will be directly mounted on the sewing machine bed, but the mounting will be carried out through the position adjusting means described below. That is, the position adjusting means is screwed into the pair of long holes 21, 21 formed in the mounting body 1 with the support plate 3 of the upper cloth portion B interposed therebetween and the screw holes formed in the sewing machine bed through these long holes. It is composed of adjusting screws 21a and 21a. By this position adjusting means, the mounting body 1 can be moved in a direction orthogonal to the cloth feeding direction of the sewing machine, that is, in the arrow direction in the drawing.

On the other hand, the upper cloth portion B is fixed to the support plate 3 which is erected integrally with the mounting body 1, and the position of only the upper cloth portion B cannot be adjusted separately. The position adjustment is performed by moving the mounting body 1 described above. Further, the tension applying means C is also fixed to the vertical wall surface 9c which is integrally provided upright on the mounting body 1.
The spherical portion 9a fixed to the tip of the pressure generating lever 9 in the tension applying means abuts on the center line of the pressing plate 6 in the longitudinal direction via the hole 4a of the upper cloth guide, and the lower end of the pressing plate 6 is the upper cloth. It is set to press uniformly. Therefore, even if the mounting body 1 is moved to adjust the stitches of the upper cloth, the positional relationship between the pressing plate 6 and the pressure generating lever 9a does not change.

Further, like the mounting body 1, the base portion 2 which constitutes the lower cloth portion A placed on the sewing machine bed surface has the mounting body 1 below the upper cloth portion via the position adjusting means.
Are connected adjacent to. 22 is a pair of connecting plates 22 fixed to the bent portion 2a at the edge of the base 2.
Reference numerals 22a and 22a are long holes formed in the connecting plates 22 and 22, and 22b and 22b are screws that are screwed to the mounting body 1 through the long holes 22a and 22a to fix the base 2 at a desired position. The connecting plate, the long hole, and the screw constitute the position adjusting means of the lower cloth portion A. By this position adjustment means,
The position of the lower cloth portion A can be adjusted separately from the mounting body 1. In addition, the position adjustment direction is the above-mentioned mounting body 1.
The same as the case of, and is the arrow direction in FIG.

The operation of this embodiment will be described based on the above configuration. First, the upper cloth is set in the upper cloth portion B, and the position of the upper cloth is adjusted by the position adjusting means so that the two stitch positions of the upper cloth are balanced at the needle drop point of the sewing machine. As a concrete work, as shown in FIG.
This is performed by loosening a and 21a and using the long holes 21 and 21 to move the mounting body 1 in either of the arrow directions. When the predetermined position is determined, the screws 21a, 21a are tightened to fix the position of the mounting body 1 on the sewing machine bed. In this work, since the upper cloth portion B and the tension applying means C are fixed to the mounting body 1, the relative positional relationship between the two does not change even when the mounting body 1 moves, and therefore the tension applying means The contact point of the spherical portion 9a with the pressing plate 6 at C is maintained at the center line as set (FIG. 2). As a result, a uniform pressing force is applied to the upper cloth at the end portion of the pressing plate 6, and The width of the folded portion is kept uniform and moves to the needle drop point. Then, loosen the screws 22b, 22b for fixing the attachment body 1 and the lower cloth portion A, and move the board 2 in either direction of the arrow using the long holes 22a, 22a to adjust the stitch position with respect to the lower cloth. Eggplant When the position is determined, the screws 22b and 22b are used for fixing. The movement of the lower cloth portion A does not affect the positional relationship between the upper cloth portion and the tension applying means. After the position adjusting work as described above, if the sewing machine is driven, a predetermined quality of the sewn product can be obtained.

Next, an embodiment of the invention according to claim 2 will be described. In FIGS. 3 and 4, reference numeral 15 is a regulation plate provided near the outlet of the upper cloth portion B. The regulation plate 15 having a substantially U-shape is fixed to the tip of the pressing plate 6 in the upper cloth portion B in this embodiment, and the end portion of the pressing plate 6, in other words, the outlet of the upper cloth portion B is discharged. Prevents the folded parts of both ends of the top cloth from losing their shape. That is, the top cloth portion B having both ends folded back to have a uniform width changes into a folded shape while moving from the outlet of the top cloth portion B to the sewing machine needle drop point, especially when it is thin. As a result, the folded width at both ends of the upper cloth may become uneven on the left and right. The restriction plate 15 is installed in the moving path of the upper cloth from the outlet of the upper cloth portion B to the needle drop point to restrict the shape variation of the upper cloth folded at both ends, It is possible to move the upper cloth to the needle drop point while keeping the width of the folded-back portions at both ends of the upper cloth uniform.

[0016]

As described above, according to the present invention, for example, a cloth guiding device for guiding the upper cloth and the lower cloth to the sewing portion of the sewing machine in order to suture the tape-shaped upper cloth to the lower cloth. ,
An upper cloth portion for guiding the upper cloth in the needle drop direction of the sewing machine by gradually bending both ends of the upper cloth, and a lower cloth portion for guiding the lower cloth sewn to the upper cloth in the needle drop direction, A mounting body for installing the upper cloth portion and the lower cloth portion, and a tension applying means fixed to the mounting body for applying tension to the upper cloth in the upper cloth portion, and the upper cloth portion is fixed to the mounting body,
The lower cloth portion includes a position adjusting means for the mounting body,
Since the mounting body is configured to have the position adjusting means for the mounted portion, the positions of the mounting body or the lower cloth portion for holding the upper cloth portion for adjusting the seam position of the upper cloth and the lower cloth are respectively adjusted. Since the positional relationship between the upper cloth portion and the tension applying means does not change even when the upper cloth portion is adjusted and moved, the folding operation of the upper cloth in the upper cloth portion is always properly performed, and the uniformity of the folded width at both ends of the upper cloth is maintained. Furthermore, the upper cloth is thin because the restriction plates are provided in the movement path of the upper cloth from the upper cloth portion end to the sewing machine stitching portion so that the widths of the bent portions at both ends of the upper cloth are equal to each other. In this case as well, the uniformity of the folded width at both ends of the upper cloth is maintained and the quality of the sewn product is improved.

[Brief description of drawings]

FIG. 1 is a perspective view of a cloth guide device according to an embodiment of the present invention.

FIG. 2 is a front view of the cloth guide device according to the embodiment of the present invention.

FIG. 3 is a perspective view of an upper cloth portion according to an embodiment having a regulation plate.

FIG. 4 is a partially cutaway enlarged view of the above.

FIG. 5 is a perspective view showing a conventional example.

FIG. 6 is a partial vertical cross-sectional view of an upper cloth portion of the cloth guide device.

FIG. 7 is a cross-sectional view near the upper end of the upper cloth portion.

FIG. 8 is a cross-sectional view near the outlet of the upper cloth portion.

FIG. 9 is an explanatory diagram showing a sutured state of an upper cloth and a lower cloth.

FIG. 10 is a perspective view showing the finished sewing.

[Explanation of symbols]

A lower cloth portion B upper cloth portion C tension applying device 1 mounting body 2 substrate 4 upper cloth guide 6 pressing plate 9a spherical portion 15 Regulation plate

Claims (2)

[Claims] 1. An upper cloth part for gradually bending both ends of the upper cloth to guide the upper cloth in a needle drop direction in a sewing machine, and a lower cloth for guiding a lower cloth sewn to the upper cloth in the needle drop direction. The upper cloth portion and the lower cloth portion are mounted on the mounting body, and the mounting body is fixed to the mounting body to apply tension to the upper cloth in the upper cloth portion. A cloth guide device for a sewing machine, wherein the lower cloth portion is fixed, and the lower cloth portion is provided with a position adjusting means with respect to a mounting body, and the mounting body is provided with a position adjusting means with respect to a mounted portion thereof. 2. An upper cloth portion for gradually guiding both upper and lower ends of the upper cloth to guide the upper cloth in a needle drop direction of the sewing machine. A cloth guide device for a sewing machine, characterized in that a regulating plate is provided on the moving path so as to make the widths of the bent portions of both ends of the upper cloth uniform.