JPH09131480A - Cloth guide device in folded cloth edge sewing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To perform accurate folded edge sewing on a position very close to the edge of cloth by using a folded cloth edge sewing machine. SOLUTION: A portion very close to the edge of a cloth is bent in the nearly S-shaped form and a guide body 10 inserted in the sewing direction is disposed on this side of the sewing part B. The guide body 10 is formed to have the width adjusted by a pair of guide members 11, 12. Further, since the edge of the cloth is prevented from moving by the move of a needle N for sewing the folded edge of the upper side cloth, a support member 22 having the tip 21 inserted in the laid U-shaped folded part is provided to nearly oppose to the move of the needle N.

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 in a festival sewing machine, in which threads are alternately sewn between facing cloths within the range of the cloth thickness.

[0002]

2. Description of the Related Art For example, when a hem (hem) is formed by folding back the hem (hem) of clothes or curtains, a sewing machine for sewing at the back is known. FIG. 1 shows an example of such a sewing machine. In this back festival sewing machine, when two levers alternately push up the lower cloth and the upper cloth as shown in FIG. 4, the arc-shaped needle N performs sewing within the cloth thickness range.

However, the conventional sewing machine has a structure in which the cloth is deeply bent and the position at the back is wound, as the term "back festival" indicates. Therefore, there is no problem if the folding width is 2 to 3 cm or deeper, but if it is extremely shallow, such as 1 cm or less from the edge of the cloth, the elastic force when the cloth is folded causes the edge of the cloth to bend. Requires a high level of skill because it is extremely difficult to sew while holding the edge of the cloth with a constant width because the force of the cloth to return is large.

As a result, it is almost impossible to use a conventional back-ditch sewing machine for sewing a garment's hem, which requires a very shallow width of 1 cm or less from the edge of the cloth. There was a problem.

[0005]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned points, and the problem is to use a sewing machine for festivals, even at a position extremely close to 1 cm or less from the edge of the cloth. It is to be able to perform sewn stitches accurately without requiring skill.

[0006]

In order to solve the above-mentioned problems, according to the present invention, a guide body 10 in which a portion very close to the edge of the cloth can be inserted in the sewing direction is arranged in front of the sewing portion B, and
The guide body 10 is a pair of guide members 1 whose width can be adjusted.
1 and 12, in order to prevent the edge of the cloth from moving due to the movement of the needle N that encircles the cloth on the upper side, the support member 22 with the tip 21 entering the bent portion of the horizontal U shape is moved by the needle N. It is provided at a position substantially opposite to.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION A guide device for a cloth C in a festival sewing machine A according to the present invention is such that a thread is alternately passed between cloths C that are in a state of being bent and opposed to each other within the range of the thickness of the cloth. It is used to perform sewing.

The festival sewing machine A has a needle plate 20 provided in a sewing portion B, and a needle N for performing a sewing operation from a direction orthogonal to a sewing direction of a cloth C shown by an arrow in FIG. It is equipped with. The cloth guide device according to the present invention has a needle plate 2
It is provided in association with 0.

A pair of left and right push-up levers 31, 32 for alternately pushing up the lower cloth and the upper cloth are pivotally supported on the needle plate 20 by a support shaft 33 so that the tip ends thereof can be vertically moved. Each lever 3
The Nos. 1 and 32 can adjust the amount of vertical movement of the distal end by changing the gap size S of the proximal end by the adjusters 34 and 35 attached to the proximal ends.

A sewing operation path of the needle N is set in a direction intersecting the tip portions 37, 38 of the left and right push-up levers 31, 32, and the push-up levers 31, 32 are alternately arranged toward the path. Operate. Reference numerals 31 'and 32' denote members for pushing up the tips 37 and 38 of the respective levers 31 and 32 from below, and 36 denotes a guide groove located in the sewing operation path of the needle N.

In the needle plate 20 having the push-up levers 31 and 32 as described above, in order to hold the portion very close to the edge of the cloth bent in the lateral U shape, the portion very close to the edge C'of the cloth. The guide body 10 into which is inserted in the sewing direction is arranged in front of the sewing portion B. The edge C ′ of the cloth C may be cut off, or the piping P may be formed by sewing an edge material along the edge of the cloth in advance (see FIG. 2).

The guide body 10 has a sufficient width for inserting a portion very close to the edge of the cloth and holding it in a state of being bent in an S-shape. The guide members 11 and 12 are combined so that they can be moved forward and backward and left and right.

The guide body 10 of the embodiment is composed of a guide member 11 having a leftward substantially J-shaped guide groove 13 and a guide member 12 having a rightward substantially J-shaped guide groove 14. In order to overlap the guide grooves 13 and 14 so that the width can be adjusted, long adjustment holes 15 and 16 are formed in the width direction of the respective guide members 11 and 12, and the adjustment holes 15 and 16 are formed to pass through the adjustment holes 15 and 16. The rising edge portion is tightened by the attaching / detaching means 17 composed of a set screw. Reference numeral 18 denotes a thread portion to be provided at the end portion of the needle plate for screwing the screw 17.

Further, in order to prevent the edge of the cloth from moving due to the movement of the needle N that encircles the cloth on the upper side, a support member 22 into which the tip 21 is inserted is provided in the bent portion of the horizontal U shape. Since the needle N pushes the cloth C in a direction substantially orthogonal to the sewing direction, the needle N is placed at a position substantially opposite to the pushing movement of the needle N.
For example, when the needle moves from left to right, the support member 22 is placed on the right side.
Place.

The support member 22 shown as an example has an arm portion 23 which is elastic and has a substantially hook shape in a plane extending in a direction orthogonal to the sewing direction. The base portion of the arm portion 23 continues to the mounting substrate 24, and a screw 26 is screwed into a small hole 25 formed therein, whereby the needle plate 20.
It is fixed to. Reference numeral 27 denotes a screw hole formed in the needle plate 20.

Using the apparatus according to the present invention having such a structure, in order to sew a festoon to a portion very close to the edge of the cloth C, the edge C'of the cloth C is formed into a horizontal U shape, and the guide body 10 is formed.
Then, the bending portion bent in the lateral U shape is guided to the tip 21 of the support member 22 to operate the needle N.

Then, for example, the needle N penetrates and returns within the range of the thickness of the lower cloth C pushed up by the pushing lever 31 on the left side, and then the upper cloth C pushed up by the pushing lever 32 on the right side. The operation of piercing the needle N within the range of the thickness is repeated, and the cloth is fed to perform the stitch sewing (see FIGS. 4 and 5).

When such a cloth guide device of the present invention is used, it is possible to easily perform sewn stitches even at a portion 1 cm or less, for example, 0.5 cm from the edge of the cloth C.
When the back festival is required, the device can be removed, so that the original function is not lost.

[0019]

Since the present invention is constructed and operates as described above, the guide body 10 preliminarily gives a lateral U-shape even before and after sewing, even at a portion that is within 1 cm from the edge of the cloth or very close to it. The support member 2 which is sewn while holding it on the sewing machine, and which is located substantially opposite to the movement of the needle N during sewing.
Since 1 holds the cloth C and prevents the cloth C from moving, it is possible to perform the festival sewing accurately without requiring a high degree of skill.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an example of a festival sewing machine in which a cloth guide device according to the present invention is implemented.

FIG. 2 is a front view of a guide body in the same apparatus.

FIG. 3 is an exploded perspective view showing the entire apparatus.

FIG. 4 is an enlarged cross-sectional view showing a part of the sewing process and the operation of the invention.

5 is an enlarged cross-sectional view of another step in the same process as FIG.

Claims (3)

[Claims] 1. A festival sewing machine, wherein threads are alternately sewn between cloths facing each other within a range of the thickness of the cloths.
In order to hold the portion very close to the edge of the cloth in the shape of a horizontal U-shape, a guide body 10 into which the portion of the cloth can be inserted in the sewing direction is arranged in front of the sewing portion B, and the guide body is also provided. 10 is a pair of guide members 11 and 1 whose width can be adjusted.
In order to prevent the edge of the cloth from moving due to the movement of the needle N that encircles the cloth on the upper side, the support member 22 having the tip 21 entering the bent portion of the horizontal U-shape is formed by the needle N.
The cloth guide device is provided at a position substantially opposite to the movement of the cloth guide device. 2. The guide body 10 includes a guide groove 13 facing left.
The guide member 11 having the guide groove 11 and the guide member 12 having the right guide groove 14 are combined to form the guide grooves 13 and 14
2. A cloth guide device for a festival sewing machine according to claim 1, wherein the cloth sewing machine has a structure in which the width of the sewing machine is adjustable and the sewing machine is stopped by the attaching / detaching means 17 at an arbitrary width. 3. The festival according to claim 1, wherein the support member 22 has an elastic planar substantially hook-shaped arm portion 23, and is configured to be fixed to the needle plate 20 by a screw means 26 in a substrate 24 following the arm portion 23. Cloth guide device for sewing machine.