JPS6231106Y2 - - Google Patents

Description

[Detailed explanation of the invention] Technical field This invention is for forming cuffs of shirts, etc.
This invention relates to a clamping device for a sewing machine for simultaneously folding one side of two substantially rectangular upper and lower work cloths and sewing the other three sides in a substantially U-shape while holding one side in the folded state.

Purpose The purpose of this invention is to provide a clamping device for a sewing machine that can sew cuffs and the like that have a beautiful appearance.

An embodiment of the present invention will now be described with reference to Figs.
The description will be made with reference to Fig. 8. As shown in Figs. 1 and 2, the rear part of the feed plate 2 which forms the underside of the clamp device placed on the work cloth support surface 1 of the sewing machine has bent attachment pieces 3 which protrude outward on both sides, and the clamp device can be attached to a feed table (not shown) via the attachment pieces 3. When the sewing machine is in operation, the clamp device moves in the X and Y directions together with the feed table. The feed plate 2 has a needle passage hole 4 which is substantially U-shaped in plan view. A positioning member 5 having a square cross section is attached to the upper surface of the feed plate 2 so as to be located between both ends of the needle passage hole 4, and a lift-up prevention member 6 having a substantially L-shaped cross section is integrally formed and protrudes from the upper front surface of the positioning member 5.

On the upper surface of the feed plate 2 are two upper and lower workpiece cloths 8 and 9 forming cuffs W and having a substantially rectangular shape.
is placed with its rear side edge folded back. Note that the widths of both the work cloths 8 and 9 are set to be approximately the same, and the length of the upper cloth 9 is set to be longer than that of the lower cloth 8. Then, the folded part 8 of the two work cloths 8 and 9 is
a, 9a are engaged with the front surface of the positioning member 5, so that both work cloths 8, 9 are positioned. A rectangular core plate 7 having a smaller spherical shape than both the processed cloths 8 and 9 is disposed between the processed fabrics 8 and 9.
is housed therein, and a protrusion 7a is formed on the upper surface of the rear edge of the core plate 7. When both the work cloths 8 and 9 are placed on the feed plate 2, the folded portions 8a of the work cloths 8 and 9 are placed between the upper surface of the core plate 7 and the lower surface of the lifting prevention member 6. 9a
is held in place to prevent it from rising.

A press plate 11 is attached to the rear edge of the feed plate 2 by a pair of hinges 10 so as to be openable and closable. A substantially U-shaped needle passage hole 12 that matches the needle passage hole 4 of the feed plate 2 is formed in this presser plate 11 . Further, the positioning member 5 is attached to the presser plate 11.
A rectangular through hole 13 is formed which allows the core plate to protrude from the upper surface of the presser plate 11 and has a larger outer diameter than the core plate 7. Therefore, when the presser plate 11 is rotated in the closing direction with the two work cloths 8 and 9 placed on the upper surface of the feed plate 2, the presser plate 11 is rotated as shown in FIG. The needle passage hole 12 matches the needle passage hole 4 of the feed plate 2, and the three edge parts of the two work cloths 8 and 9 excluding the folded parts 8a and 9a are between the presser plate 11 and the feed plate 2. sandwiched between. Further, the center portion of the upper cloth 9 on the core plate 7 and the positioning member 5 are connected to the presser plate 1 through the through hole 13.
It is designed to protrude from the top surface of 1.

Therefore, when sewing the cuffs W of a shirt using the clamping device of the sewing machine configured as described above, first the presser plate 11 is sewn as shown in FIG.
hold open. On the other hand, the core plate 7 is inserted between the lower cloth 8 and the upper cloth 9, and as shown in FIG.
After the rear edge of the upper cloth 9 is folded back to form a folded part 9a, the rear edge of the lower cloth 8 is folded back along the rear side of the core plate 7, and the folded part 8a is then folded back to form the folded part 9a. 7 and the folded portion 9a of the upper cloth 9. After that, the two work cloths 8 and 9 and the core plate 7 are placed on the feed plate 2, and the folded part 8
a, 9a and the protrusion 7a of the core plate 7 are inserted between the upper surface of the feed plate 2 and the lower surface of the lifting prevention member 6, and the folded portion 8a of the lower cloth 8 is engaged with the front surface of the positioning member 5. For example, the two work cloths 8 and 9 can be positioned. In this state, each of the folded portions 8a and 9a is held between the lower surface of the lifting prevention member 6, the upper surface of the core plate 7, and the upper surface of the protrusion 7a, preventing the lifting of each of the folded portions 8a and 9a. can be prevented.

Next, when the presser plate 11 is rotated in the closing direction, 3
The two edges are sandwiched between the presser plate 11 and the feed plate 2, and the needle passage hole 12 of the presser plate 11
matches the needle passage hole 4 of the feed plate 2. Then, when the sewing machine is operated with the presser foot (not shown) lowered and the feed plate 2 pressing the three edges of the work cloths 8 and 9, excluding the folded parts 8a and 9a, toward the work cloth support surface 1, The needle N and the feed table (not shown) are operated, and a substantially U-shaped seam S can be formed at the three edges as shown in FIG.
Both workpiece cloths 8 and 9 can be sewn with the upper cloth 9 floating up relative to the lower cloth 8.

Next, after rotating the presser plate 11 in the opening direction and taking out the two sewn work cloths, the work cloth 8,
Remove core plate 7 from 9. After that, each processed cloth 8,
Insert your hand between each folded part 8a, 9a of 9.
When the two pieces of work cloth 8 and 9 are turned over, as shown in FIGS. 6 to 8, three edges of the lower cloth 8 excluding the folded part 8a and three sides of the upper cloth 9 excluding the folded part 9a are formed. It is possible to form a beautiful cuff W that covers the edges. As shown in FIG. 7, the cuff W is sewn to the sleeve P with the end of the sleeve P inserted between the folded portions 8a and 9a.

As described above, in this embodiment, the two workpiece cloths 8 and 9 can be sewn together with the rear edges of the workpiece cloths 8 and 9 folded back accurately, so that the cuffs W can be sewn together.
The appearance of the opening can be formed beautifully.
Furthermore, since both the work cloths 8 and 9 can be sewn together while the entire core board 7 is housed in the two work cloths 8 and 9, both work cloths 8 and 9 can be sewn together without being hindered by the core board 7. The work cloths 8 and 9 can be sewn securely.

Effects As detailed above, this invention involves forming an approximately U-shaped needle passage hole in a feed plate on which two pieces of work cloth can be placed, and a presser plate that is attached to the feed plate so as to be openable and closable. A needle passage hole is formed that matches the passage hole, and the fabric is sewn in such a state that the entire fabric is accommodated between two pieces of fabric placed on the feed plate, and the upper fabric is raised relative to the lower fabric. A core plate is provided on the feed plate, and the core plate is accommodated on the feed plate and engages with the folded portions of the two folded work cloths to position it. By providing a positioning member and providing a lifting member adjacent to the positioning member to prevent the folded portion from lifting, two pieces of work cloth can be accurately folded, resulting in beautiful cuffs, etc. It has the excellent effect of being able to sew.

[Brief explanation of the drawing]

Fig. 1 is an exploded perspective view showing an embodiment of a clamping device embodying this invention, Fig. 2 is a cross-sectional view of the main parts of the clamping device, Fig. 3 is a plan view showing the sewing state of cufflinks, and Fig. 4 is a sectional view taken along line A-A in FIG. 3, FIG. 5 is a sectional view taken along line B-B in FIG. 3, FIG. 6 is a perspective view showing the completed cuff, and FIG. 7 is taken along C--
8 is a sectional view taken along the line D--D in FIG. 6. Feeding plate...2, Needle passing hole...4, Lifting prevention member...6, Core plate...7, Lower fabric...8, Upper fabric...9, Pressing plate...11, Needle passing hole... 12. Cufflinks...W.

Claims (1)

[Scope of Claim for Utility Model Registration] In order to form cuffs W of a shirt, etc., one side of two upper and lower approximately rectangular work cloths 8 and 9 is folded at the same time, and while keeping one side folded, the other three In a clamping device of a sewing machine for sewing the sides in a substantially U-shape, there is provided a feed plate 2 on which the two workpiece cloths 8 and 9 can be placed and in which a needle passage hole 4 having a substantially U-shape is formed.
, a presser plate 11 that is attached to the feed plate 2 so as to be openable and closable and in which a needle passage hole 12 that matches the passage hole 4 is formed, and two pieces of work cloth 8 that are placed on the feed plate 2. ，
a core plate 7, which is entirely housed between 9 and 9, so that the upper cloth 9 can be sewn in a raised state relative to the lower cloth 8; a positioning member 5 for engaging with and positioning the folded portions 8a, 9a of the two work cloths 8, 9 folded back with the plate 7 accommodated; and a positioning member 5 adjacent to the positioning member 5. A clamp device for a sewing machine, characterized in that a lifting prevention member 6 is provided for preventing the folded portions 8a, 9a from lifting.