JPH0118154Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a welt forming jig used in a sewing factory.

Generally, a bead pocket having one or both bead edges is formed as follows. First, two opening cloths are placed on the front side of the fabric with an appropriate distance between them, stacked in the same direction or facing each other, and their edges are sewn together. At this time, one or both edges of the opening cloth are folded in to form a loop when sewing. Next, make a notch in the fabric between the sewn parts of the opening cloth to form the opening for the pocket, then push the two attached opening cloths through the notch to the back of the fabric and sew the corners on both sides. to secure the opening cloth. As a result, the loop becomes a bead, so that a bead pocket can be formed.

However, even when first positioning the opening cloth, or when folding the edge of the opening cloth to form a loop that will become the beading, even if you draw a positioning line on the fabric with a tool, etc. Both of these steps had to be carried out using only the intuition of the seamstress, and it was extremely difficult to accurately position the opening cloth and perform the sewing process. Moreover, even when sewing, there are cases where the sewing machine cannot sew the fabric straight, making it impossible to attach the two opening fabrics parallel to each other at appropriate intervals, and because the fabric is fed at high speed by the sewing machine, the sewing machine may not be able to sew the fabric straight. There was a problem where the machine could not accurately sew just the width of the machine, causing it to sew. As a result, the opening fabric inevitably bends or shifts, making the formed pockets wrinkled and easily scratched. Therefore, it is difficult to form such beaded pockets, especially the beaded edges, unless you are a very skilled person. It was possible.

In addition, not only beaded pockets but also pockets with lids and box pockets have similar disadvantages, and solving these disadvantages has been an important issue, especially in sewing factories that carry out mass production.

This invention was designed to eliminate the above-mentioned inconveniences, and anyone can easily and accurately attach the opening cloth to the fabric using a sewing machine. This allows the edges to be easily formed.

Next, this invention will be explained with reference to illustrated embodiments.

The jig according to the illustrated embodiment has two bead-forming members 1 arranged opposite to each other, which have a corresponding shape and a holding member 2 having a substantially U-shaped cross section.
It is attached by holding both ends.
One bead forming member 1 is fixed to the holding member 2 by tightening a screw 3 and a threaded pin 4 from the back side, while the other member 1 is fixed to the holding member 2 through a slot 2a formed on the holding member 2. The screw 5 and the threaded pin 6 that pass through are also tightened with nuts from the back side, so that they can be adjusted freely. Each bead forming member 1
consists of a base plate 8 having an extension 7, and an opening cloth presser plate 9 rotatably attached to the base plate 8 so as to be freely openable and closable; , 6 are formed therein. The opening cloth presser plate 9 is attached to a height adjusting member 10 with a hinge 11 so that one vertical edge of the opening cloth presser plate 9 is aligned with one vertical edge of the base plate 8. It is made up of several plate-like pieces, and by adjusting the number, the height of the opening cloth pressing plate 9 can be adjusted according to the thickness of the opening cloth sandwiched between the base plate 8 and the opening cloth pressing plate 9. This is how it was done. The opening cloth presser plate 9 is provided with a guide member 12 having a rectangular cross section along its longitudinal edge aligned with the base plate 8.
is engaged with the groove 13b of the sliding part 13a provided in the sewing machine jig 13 shown in FIGS. 4 and 6, and the jig 1
In this jig 13, the sewing machine needle is configured to reciprocate through the hole 13c of the sliding portion 13a. Furthermore, the opening cloth presser plate 9 is provided with two elongated positioning members 15 on which the two stop members 14 are attached in a freely adjustable manner, and these are arranged parallel to each other, one of which is connected to the edge where the guide member is attached. It is provided along the opposite longitudinal edge. The stop member 14 is made of an L-shaped plate, and is provided as a stopper for the sewing machine jig 13 that slides on the guide member 12, and is adapted to define the width when sewing the opening cloth. . This stop member 14 is fastened onto the guide member 12 and the positioning member 15 with a screw 16, the screw 16 being a circular ring inserted into a fitting portion 15a formed in each positioning member 15, as can be seen in FIGS. Board 17
The disc 17 can be slid between the positioning members 15 when moving the stop member 14 to another position.

The members constituting the bead forming member 1, such as the substrate 8 and the opening cloth presser plate 9, are preferably made of transparent plastic plates such as acrylic plates, and may also be made of wood, metal plates, etc. In order to set the distance between the bead forming members 1 and the stop members 14, each holding member 2 and the base plate 8 are provided with scales 18, 19, respectively. Further, on the back side of the substrate 8 and the opening cloth presser plate 9, a non-slip member 20 such as sandpaper is provided.
(one of which is shown in Figure 2) is attached to prevent the fabric or opening cloth from slipping.

An example of how to use the jig configured as described above will be described in the case of forming a single-bead pocket.

First, the sewn part S ₁ of the upper cloth and the sewn part S ₂ of the lower cloth.
In order to determine the distance G (see Fig. 7) between the adjustable beading member 1 and the other fixed It is displaced within the holding member 2 relative to the bead forming member and fixed again with the screw 5 and threaded pin 6 in accordance with the desired spacing between the sewn parts. Also, by loosening the screws 16 and sliding the stop members 14 of each bead forming member 1 along the positioning member 15, the width W (Fig. 7) of the sewn portions S ₁ and S ₂ of the opening cloth is formed. It is fixed according to the width of the pocket, and the distance between each stop member is adjusted in advance.

Next, as shown in FIG. 2, after placing the fabric A on which the pocket is to be formed with its front side up, the jig according to this invention is placed at a desired position. Then, for example, as shown in the figure, the opening cloth presser plate 9 of the fixed bead forming member 1 is opened, the lower opening cloth B is placed on the base plate 8 with the front side up, and the opening cloth presser plate 9 is closed. Then, the lower opening cloth B is sandwiched and fixed between the substrate 8 and the presser plate 9. In this case, the lower opening cloth B is positioned so that its front edge Ba slightly protrudes from the vertical edges of the base plate 8 and the opening cloth pressing plate 9 by the amount of the sewing allowance.

Furthermore, as shown in FIG. 3, the upper opening cloth C is now sandwiched on the base plate 8 of the other adjustable beading member 1 in the same direction as the aforementioned lower opening cloth B, with the back side facing up. In this case, the front edge Ca of the upper opening cloth C is folded inward to a desired extent by the width of the bead to be formed, and the opening cloth pressing plate 9 is closed to form a loop in the upper opening cloth C. When closing each opening cloth presser plate 9 to fix the lower opening cloth B and the upper opening cloth C, the threaded pins 4 and 6 engage with the slot holes 7a provided in the extension part 7 of the base plate 8, respectively. , the opening cloth pressing plate 9 can be securely fixed to the substrate 8. Further, since the anti-slip member 20 is provided on the back side of each of the substrate 8 and the opening cloth presser plate 9 as described above, the cloth A and the opening cloths B and C will not shift. In this way, the upper and lower opening cloths C and B can be accurately positioned at desired positions with respect to the cloth A.

The operation of sewing the positioned upper and lower opening cloths C and B to the fabric A using a sewing machine begins with the upper opening cloth C first. To do this, the groove 13b of the sliding part 13a of the sewing machine jig 13 is fitted into the guide member 12 of the top cloth presser plate 9 that fixes the top cloth C, as shown in FIG. The sliding portion 13a may be slid between the stop members 14 while moving the entire sewing machine on the table of the sewing machine. As a result, the sewing machine needle is moved to the sliding portion 13.
Since it passes through the hole 13c of a and advances along the guide member 12, the top cloth C can be sewn to the fabric A by forming a loop that becomes a bead at the front edge of the top cloth C. . In this case, the sliding part 13 can be guided between the inner ends 14a of the stop members 14 on one side and on the other, making it possible to precisely sew by a predetermined width of the pocket.

In addition, to attach the lower opening cloth B, turn over the upper opening cloth C that covers the lower opening cloth B, and
The jig can be operated in the same manner as the above-mentioned upper cloth C by sliding it on the guide member 12 of the cloth presser plate 9 that fixes the lower cloth B, and in this way the lower cloth B can also be easily sewn onto fabric A.

Next, with the fabric A removed from the jig or fixed to the jig, cut D along the center line between the welt forming members 1 as shown in FIG. 7 using a cutting tool such as a cutter or scissors. to form the opening of the pocket. Triangular pieces E are then formed on both sides of the cut D from the back side of the fabric A. After that, the cut D
Push the upper and lower opening cloths C and B into the back side of fabric A, and then tie the triangular piece E on both sides of both opening cloths B and C so that both ends of the sewn parts S ₁ and S ₂ of opening cloths B and C are tied together. Machine stitch along with the edges. As a result, the upper opening cloth C becomes the opposite cloth on the back side of the fabric A, the lower opening cloth B becomes the lining of the pocket, and the loop formed on the upper opening fabric C becomes a beveled edge on the front side of the fabric A, so that one side of the opening becomes the opposite fabric. You can complete the edge pocket.

In addition, when forming both welt pockets, position the lower opening cloth B on the board so as to form a loop in the same way as the upper opening cloth C, and then attach the upper opening cloth C to this lower opening cloth. It is sufficient to form a loop and position it facing B.

In this way, according to this invention, it is possible to accurately position the opening cloth at a desired position with respect to the fabric when forming the welt, and the width of the sewing part of the opening cloth and the interval between the sewing parts can be adjusted arbitrarily. This makes it possible to accurately guide the sewing machine needle, making it possible for anyone to easily perform the welt-edge forming work, which was conventionally complicated and required skill.

[Brief explanation of the drawing]

Fig. 1 is a plan view of one embodiment of the jig according to this invention, Fig. 2 is a needle perspective view showing the state in which the lower opening cloth is positioned on the jig placed on the fabric, and Fig. 3 is a plan view of one embodiment of the jig according to this invention.
The figure is a perspective view showing the positioning of the upper opening cloth, FIG. 4 is a side view of the sewing machine jig used in the above embodiment, and FIG. 5 is a cross-section along the - line in FIG. FIG. 6 is a view similar to FIG. 5 when a sewing machine jig is used, and FIG. 7 is an explanatory view showing the opening of the pocket as seen from the back side. 1: Bead forming member, 8: Substrate, 9: Opening cloth presser plate, 12: Guide member, 14: Stopping member, A: Fabric, B: Lower opening cloth, C: Upper opening cloth, S ₁ , S ₂ : Sewn part, W: Width.

Claims (1)

[Scope of utility model registration request] A height adjustment member 10 and a hinge 11 are attached to one longitudinal end edge of the opening cloth presser plate 9, which positions the opening cloth against the fabric on which the welt is to be formed, to one longitudinal end edge of the base plate 8.
The sewing machine has a bead forming member 1 which is attached so as to be openable and closable in the vertical direction through a welt forming member 1, and the opening cloth presser plate 9 is provided with a guide member 12 having a rectangular cross section for guiding a sewing machine needle along the longitudinal side edge of the opening cloth presser plate 9. Further, the opening cloth pressing plate 9 is provided with two elongated positioning members 15 extending vertically in parallel with each other, and a stop member 14 that determines the width of the sewing part of the opening cloth is attached to these positioning members 15 so as to be freely adjustable in position. A jig for forming bead edges.