JPH0729975Y2 - Sewing machine piping tape guide device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a piping tape guide device of a sewing machine for sewing a piping tape.

[Prior Art] Generally, in order to improve the appearance of the seam at the bottom of the bag, the piping tape core is sandwiched between the folded portions of the cloth, and the overlapping cloth portion close to the piping tape core is sewn. The piping tape thus formed is sewn into the sewn portion at the bottom of the bag. In order to sew this piping tape to the bottom of the bag, a sewing machine provided with a piping tape guide device has been proposed as shown in FIG. In FIG. 5, the piping tape guide device 4 is fixed on the cloth base 2 of the sewing machine 1 by the setscrew 3.
The guide base 5 is fixed. A U-shaped guide portion 6 and a piping tape guide 8 including an open portion 7 in which a part of the guide portion 6 is open are fixed on the guide base 5 with the guide base 5 with an appropriate gap. . In addition, presser foot is attached to the rear part of the piping tape guide device 4 in the cloth feeding direction.
9a and needle 9b are attached, and an upper knife is attached to the side of the work clamp 9a.
9c is installed. 9d is a needle plate.

In this type of conventional piping tape guide device, the core portion of the piping tape is inserted into the guide portion 6 of the piping tape guide 8, the hem portion of the piping tape is inserted into the open portion 7, and the bag is placed above and below the piping tape guide 8. The combined cloths of No. 3 are combined, sent together with the piping tape to the lower part of the presser 9a, and sewn by the needle 9b.

[Problems to be solved by the invention] However, in the conventional device, in order to feed the piping tape and the upper and lower bags so that the positions of the sutured portions do not shift,
Since the guide portion 6 of the piping tape guide 8 is made to substantially coincide with the diameter of the core portion of the piping tape, when using the piping tapes having different core thicknesses, the diameters of the respective core portions are matched with each other. A piping tape guide 8 having a dedicated thickness guide portion 6 must be prepared, and therefore, the piping tape guide device 4 must be replaced each time a piping tape having a different core diameter is used. However, there has been a problem that the attachment / detachment operation of the device for this exchange is troublesome. In addition, since there is no guide for the matching cloth against the needle drop, there is a drawback that the upper and lower matching cloths are misaligned and the finish is unsightly. There was a problem that required.

It is an object of the present invention to provide a piping tape guide device for a sewing machine, which can use piping tapes having different core diameters.

[Means for Solving the Problems] In order to achieve the above-mentioned object, the present invention is arranged in front of the sewing machine stitching portion in the cloth feeding direction, and feeds a piping tape composed of a core portion and a hem portion together with the sewing cloth. In the sewing tape guiding device of the sewing machine,
A piping tape guide having a U-shaped guide portion into which a core portion of the piping tape is inserted and an opening portion through which a hem portion is inserted, a tip end portion of the piping portion of the piping tape guide inserted into the opening portion, and the opening portion in the opening portion. A guide adjusting plate provided with a guide adjusting knob capable of adjusting the position of the tip portion is mounted.

[Operation] According to the present invention, by adjusting the position of the tip of the guide adjusting plate in the opening of the piping tape guide, the tip of the guide adjusting plate can be adjusted even if the thickness of the core of the piping tape varies to some extent. Since the piping tape is pressed against the guide part at the part to guide it, the relative positions of the upper cloth, the lower cloth and the piping tape do not shift, and furthermore,
By guiding the upper cloth and the lower cloth with the cutting guide, the relative position of the piping tape and the upper cloth and the lower cloth does not shift, and a bag having a beautiful finish can be formed.

[Embodiment] Referring to FIGS. 1 and 2, in a piping tape guide apparatus according to an embodiment of the present invention, a guide base 10 has an end portion 10.
a is bent downward at a right angle, and a hole 10b is provided in parallel with the edge of this end 10a.
Screw 0 to the sewing machine and adjust the guide stand 10 to the lateral position to adjust the needle drop. Also, U on the guide base 10
A character-shaped guide portion 11a and a piping tape guide 11 provided with an open portion 11b on the guide portion 11a are fixed by screws 12. Further, the screw shaft 14 is fixed to the upright portion 10c of the guide base 10, the adjusting knob 13 screwed to the screw shaft 14 is rotatably mounted, and the hole provided at the end 15a of the adjusting plate 15 is screwed. It is loosely fitted to the shaft 14. Further, the end 15 of the adjusting plate 15
A spring 17 is provided between a and a spring washer 16 provided at the tip of the screw shaft 14. Further, the middle portion of the adjusting plate 15 is bent, and a circular tip portion 15b, for example, is provided at the tip thereof,
A part of the tip portion 15b is inserted into the open portion 11b of the piping tape guide 11. Further, it faces the open portion 11b of the piping tape guide 11, and the tip portion 15b of the adjusting plate 15
Cylindrical cutting guide with a distance to move
A supporting shaft 19 is rotatably supported by a supporting shaft 19, and a retaining ring 20 is supported so as not to come off. The support shaft 19 passes through a hole provided at the eccentric position of the cutting guide 18
Since it is fixed to 10, when the cutting guide 18 is rotated, the distance between the needle drop position and the edge of the upper fabric is adjusted, and it serves as a cloth feed guide for overlock stitching, and the cutting position can be determined.

In the piping tape guide device of this embodiment having the above-described structure, the core portion 21a of the piping tape 21 is inserted into the guide portion 11a of the piping tape guide 11 as shown in FIGS. Open the hem 21b of the
11b, the adjusting knob 13 is rotated between the hem 21b of the piping tape 21, until the tip 15b of the adjusting plate 15 comes into contact with the core 21a of the piping tape 21, and further,
After rotating the cutting guide 18 to position the end of the lower cloth 23 of the upper cloth 22, the piping tape 21 is sandwiched between the upper cloth 22 and the lower cloth 23, and the upper cloth 22 and the lower cloth 23 are guided by the cutting guide. While making contact with 18, insert it together with the piping tape 21 under the presser foot of the sewing machine and perform sewing. Also,
When using the piping tape 21 with a thin core 21a,
By rotating the adjustment knob 13 and moving the tip end portion 15b of the adjustment plate 15 until it comes into contact with the core portion 21a of the piping tape 21, the piping tape 21 is moved to the piping tape guide 11
The guide portion 11a and the tip portion 15b of the adjusting plate 15 are securely held.

In this embodiment, as described above, the piping tape 21 is securely held by the piping tape guide 11 regardless of the size of the commonly used core portion 21a, and the upper cloth 22 and the lower cloth 23
Can be sewn to the piping tape 21 by the cutting guide 18 with a uniform overhanging width at all times, and it is possible to prevent the upper and lower cloths 22 and 23 from being displaced from each other during curve sewing and the like. Further, the support shaft 19 is fixed to the guide base 10 through the hole provided at the eccentric position of the cutting guide 18 to adjust the distance between the needle drop position and the edge of the upper and lower fabrics. For example, an L-shaped cutting guide is provided. May be slidable to adjust the distance, and the cutting guide 18,
L-shaped slidable cutting guide 6 and presser foot
It may be provided on the needle plate 9d or the like between it and 9a (see FIG. 5 for convenience).

[Advantages of the Invention] Since the present invention is configured as described above, the piping tape can be securely held regardless of the size of the core of the piping tape, and during adjustment work,
The knob can be easily adjusted by rotating the knob without using any tools, and the cutting guide always has an even overedging width, and piping tape can be sewn between the upper and lower fabrics for a clean look. Since it is possible to form a bag with various seams and the cutting guide is formed in a cylindrical shape, it is possible to reliably guide even a curved cloth edge.

[Brief description of drawings]

FIG. 1 is a plan view of a piping tape guide device for a sewing machine according to an embodiment of the present invention, FIG. 2 is a front view of the device of FIG. 1, and FIG. 3 is a view for explaining a usage state of the device of FIG. FIG. 4 is a partial cross-sectional view of the state of FIG. 3, and FIG. 5 is a partial perspective view of a sewing machine equipped with a conventional piping guide device. 10 …… Guide stand, 11 …… Piping tape guide, 12…
… Screw, 13 …… Adjustment knob, 14 …… Screw shaft, 15 …… Adjustment plate, 16 …… Spring washer, 17 …… Spring, 18 …… Cutting guide, 19 …… Support shaft, 20 …… Retaining ring, 21 …… Piping tape, 22 …… Upper fabric, 23 …… Lower fabric.

Claims (1)

[Scope of utility model registration request] 1. A sewing tape guiding device for a sewing machine, which is arranged in front of a sewing section of a sewing machine in a cloth feeding direction, and a piping tape having a core and a pair of skirts extending from the core is fed together with the sewing cloth. At, on the guide stand,
A U-shaped guide portion that is opened laterally so that the core portion of the piping tape is inserted, and a piping tape guide that has an opening portion that communicates with the guide portion and has a skirt that passes through the guide portion, and the opening portion of the piping tape guide. And a guide adjusting plate having a tip portion to be inserted in the guide adjusting plate, and the knob portion is provided so that the position of the tip portion can be adjusted in a direction perpendicular to the cloth feeding direction by rotating the knob portion. Facing the adjusting means and the opening of the piping tape guide,
A piping tape guide device for a sewing machine, comprising a cylindrical cutting guide rotatably provided on an eccentric shaft.