JPS5830547Y2 - Attachment for dart sewing - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an attachment to be placed in a sewing machine section that performs dart sewing with curves such as pleats on skirts and the like.

When using this type of dart sewing, which is commonly used,
Because the three-dimensional bulge has to be fitted to cloth that has been cut flat with darts, the seam shape usually has a curve, so it is necessary to use a pattern with the seam shape determined in advance when sewing with darts. Each destination had to be manually sewn according to the shape of the seam, which was cumbersome and inefficient.

Moreover, in this case, widening stitching was even more difficult.

There are automatic sewing machines that are designed to improve the above drawbacks, but in this case, the fabric feed is extremely large and complicated, with a separate feeding mechanism installed above the sewing machine body that is automatically synchronized with the sewing machine feed. Not only are they difficult to handle and require skill, they are also expensive and difficult to prepare in large numbers.

The present invention was developed in view of the above-mentioned circumstances, and focused on the fact that it would be of great benefit to those skilled in the art if it were possible to perform curved dart sewing with a simple attachment mechanism to the sewing machine body. be.

Hereinafter, the present invention will be described with reference to drawings of embodiments.

In FIG. 1, reference numeral 1 denotes a sliding frame for holding the sewing material, which has a rectangular shape as a whole and has a width that can pass through at least the lower part of the sewing machine main body 3, and has a thin bottom plate 2 such as a synthetic resin plate attached to the lower surface. , a presser foot ruler piece 4 for sewing fabric having a frame side constituting one side of the sliding frame 1 having a curve a according to the seam shape;
The presser ruler piece 4 has both ends guided by guide grooves 5 formed at both ends of the sliding frame 1, and rotates at right angles by a cam step 5' cut out at the front edge of the guide groove 5. , the presser foot ruler piece 4
A presser foot member 6 made of a presser foot or presser rubber protruding from the lower edge of the thin bottom plate 2 is placed opposite to the contact surface 2' of the edge of the thin bottom plate 2, and the seam-shaped portion of the sewing material A that will be the dart folded material is A sewing width ruler piece 7 is provided inside the sliding frame 1 to regulate the leading edge of the sewing material A inserted from below the presser foot constant ruler piece 4. The support pieces 8 provided at both ends are fitted into width adjusting grooves 9 which are perpendicular to each other, and the sewing width 6 is determined by selecting the attachment position.

Reference numeral 10.10' denotes guide pins protruding from the lower surface of both ends of the sliding frame 1 opposite to the presser ruler piece 4;
．． 10' is fitted into a guide rail 13.13' which is perpendicular to the sewing machine body 3 and is provided on one side of the mounting plate 12 set on the table part 11 of the sewing machine body 3, so that the sliding frame 1 is connected to the sewing machine body 3. It looks like it passes below.

In this case, at least one portion of the guide rail 13 is formed with a curve 13a corresponding to the seam shape A', so that the seam line and the position of the sewing machine needle 3a are always parallel to each other to prevent combing wrinkles.

Explain the action of Iyoko.

First, the sliding material 1, which is made to be able to pass inside the sewing machine needle 3a section of the sewing machine main body 3 under the guidance of the guide rails 13 and 13', is moved to the front side (pre-sewing stage) of the sewing machine main body 3. It is something to keep.

Here, the opening is a presser ruler piece 4 which faces the front edge of the thin bottom plate 2 of the sliding frame 1 and has a pinched shape.

In this case, first, by bending the link mechanism 15 attached to the reinforcing frame part 14 integrally parallel to the presser ruler piece 4 and moving the reinforcing frame part 14 backward in parallel, the reinforcing frame part 14 The guide piece 14' provided on the guide piece 14' retreats along the guide groove 5, and the support piece 4' of the presser ruler piece 4, which is pivotally attached to the tip of the guide piece 14' with a shaft pin 16, retreats. However, at this time, the support piece 4' is dislocated from the cam stepped portion 5' that protrudes inside the guide groove 5, and the support piece 4' is moved 90 degrees against the spring 17 attached to the shaft pin 16. ° rotate,
A presser member 6 protruding from the lower surface of the presser ruler piece 4 moves into the sliding frame 1
It is located on the upper edge of and is oriented horizontally.

That is, the presser ruler piece 4 becomes the opening C (Fig. 2, Fig. 5).
(see figure).

In this state, place the sewn fabric A, which will be the dart folded fabric to be dart-sewn, in the opening C of the sliding frame 1 so that its tip abuts against the sewing width ruler piece 7, which has a predefined sewing width. After this, if the link mechanism 15 formed by bending the presser ruler piece 4 in the opposite direction is immediately extended, the reinforcing frame 14 and guide piece 14' attached to this will resist the spring 17'. The guide piece 14' moves forward, and the 4 presser ruler pieces at the end of the guide piece 14' are fed out forward, and at this time, the lower edge of the support piece 4' comes into contact with the cam stepped part 5' and falls sideways. Therefore, the sewn fabric A is held down by the holding member 6 provided at the lower edge of the holding ruler piece 4.

In this case, the edge of the thin bottom plate 2 facing the presser ruler piece 4 also has a curve a' corresponding to the curve a of the presser ruler piece 4, so that the seam tear fabric A held by the presser ruler piece 4 is A seam shape A' is formed.

Next, during sewing, the sliding frame 1 holding the edge-tear fabric A is
Move the 4 ends of the presser foot ruler piece to the inside of the sewing machine needle 3a section of the sewing machine main body 3 so as to face it. Since it fits into the rail 13 and its position is regulated, it can surely slide in the vicinity of where the sewing machine needle 3a falls.)
If the desired location (dart sewing location) is sewn using a sewing machine, this seam will appear parallel to the presser foot ruler piece 4.

That is, the sewn fabric A sandwiched between the sliding frame 1 is the sewing machine needle 3.
The cloth is sequentially fed by the feeding action of the feed dog portion 3b which moves with the vertical movement of the slide frame 1, and the sliding frame 1 also slides sequentially in unison.

In this case, if an appropriate bullet 18 made of a spring, rubber, etc. is auxiliary placed on the other end of the sliding frame 1, smooth movement can be achieved, or appropriate air holes are provided in the table part 11 and the mounting plate 12. Of course, it is also possible to open the sliding frame 1 (not shown) and apply this air pressure to the thin bottom plate 2 to keep the entire sliding frame 1 slightly floating.

In this state, when the sewing position reaches the car 18 portion of the presser foot ruler piece 4, at least one guide pin 10 protruding from the sliding frame 1 is located at the curve 13a portion of the guide rail 13, and the sliding frame Since the entire body 1 is sequentially moved, the sewn fabric A located at the sewing part where the sewing machine needle 3a descends is also sequentially moved, so that it is no longer possible to feed the fabric by hand as in the past. It becomes something that does not invite.

Thereafter, the sewing work ends when the sliding frame 1 passes the position of the sewing machine needle 3a.

At this time, the release piece 19 protruding from the side surface of the inner frame portion 1a, which is symmetrical to the presser ruler piece 4 of the sliding frame 1, comes into contact with an appropriate operating lever 20, and the lever connected to the release piece 19 The connecting rod 22 connected to both ends of the rod 21 is one side 15a of the link mechanism 15.
is pulled, and the bending stopper piece 15C formed on the central pivot portion 15b of the link mechanism 15 is dislodged, so that the reinforcing frame portion 14 retreats due to the elastic contraction of the spring 17'.
The presser ruler piece 4 that is integrated with the reinforcing frame part 14 is moved backward in the opposite direction to the above, and the supporting piece part 4' is moved to the cam step part 5.
’.

That is, the sewn torn fabric A held by the presser foot ruler piece 4 is automatically released, and the dart stitch A having a curve is automatically released.
” will be completed.

In addition, when performing this dart sewing, if the operation of the sewing machine body 1 is capable of creating a slit (a place not to be sewn) in the middle of the material, it is also possible to temporarily tack the hem of pleats continuously, for example. .

FIGS. 8, 9, and 10 A9 and FIG. 11 show sliding frames showing other embodiments, and a curve a provided on this sliding frame 1.
The presser foot ruler piece 4 is attached to the lower edge of the rotation frame portion 1'' that is provided at the front edge of the dome frame 1' formed on the upper part of the sliding frame body 1, and the presser foot ruler piece 4 is thin as described above. It is rotatably positioned on the side edge of the bottom plate 2 and holds the sewn fabric A to be inserted into the opening C.

In this case, a predetermined sewing width is set by bringing the leading edge of the sewn fabric A into contact with a sewing width ruler piece 7 arranged inside the sliding frame 1.

Moreover, the guide rails 13, 13' in this embodiment are as follows:
One is attached to the mounting plate 12 and the other is attached to the front edge of the lower surface of the thin bottom plate 2 of the sliding frame 1, and the guide pin 10.10' guided to the guide rail 13.13' is attached to the sliding frame. 1 and the other protrudes from the table portion 11 on the side of the sewing machine main body 3, and supports the sliding frame 1 at two points at the front and rear for predetermined movement.

That is, when sewing darts, first, the presser ruler piece 4 is rotated in a semicircular arc of the rotating frame portion 1'' to form an opening C, and the torn fabric A is held therebetween.

At this time, the presser ruler piece 4 is fixed using the stopper pieces 15a of the bending link mechanism 15' provided at both ends of the rotating frame 1''.
The clamping force is maintained by the stopper action caused by the expansion of ', 15 b'.

Next, the sliding frame 1 is guided below the sewing machine main body 3 in the same manner as described above, and the sewing machine needle 3a is dropped onto the sewing material A held by the presser ruler piece 4, so that dart sewing can be performed in sequence. be.

In this embodiment, the sewing is performed from the curved portion of the dart.

Further, the stopper of the presser ruler piece 4 is released upon completion of dart stitching when the release piece 19 protruding from the side surface of the inner frame portion 1a of the sliding frame 1 comes into contact with an appropriate operating rod (not shown) in the same manner as described above. Opposite,
The stopper piece 1 is connected to the release piece 19 by the cable 23.
5 a'j5 b' is unstretched and bending link mechanism 1
The rotation frame 1'' is rotated by the compression of a spring 24 attached to one end of the rotation frame 1'', and the presser ruler piece 4 integrated with the rotation frame 1'' is lifted and released.

As mentioned above, the present invention allows the sewn fabric to be held by the ruler piece having a curve corresponding to the seam shape provided on the sliding frame, and slides the entire sliding frame by the feed associated with sewing with the sewing machine. The sliding frame portion is guided by two guide pins and two guide rails, and curved dart stitching can be easily and reliably performed by the side-bending action of the ribs provided on the guide rail portion. .

In other words, by arranging a curve corresponding to the curve of the seam shape on the guide rail and making it possible to rotate the entire sliding frame as appropriate, there is of course no risk of the seam shape curving, and it is also possible to adjust the seam shape to the seam. This makes it possible to perform dart stitching without causing any wrinkles.

In addition, this dart sewing attachment is for pulley back sewing,
It can be applied to various types of sewing such as pleat back seam and side seam.

In addition, since the present invention is composed of an extremely simple combination of a mounting plate on which guide rails are placed and a sliding frame, it can be easily set even if it is installed in the main body of a ready-made sewing machine, that is, the use of an attachment is not required. It is convenient because it can be done, and has practical effects such as being easy to handle by anyone without requiring any skill.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, and Figure 1 is a slope view;
Fig. 2 is a plan view, Fig. 3 is a slope view showing the main parts, Fig. 4 A is a plan view and partially cutaway side view showing the operating state of the presser foot ruler piece, Fig. 5 is a side view showing the seams. The set plan view, Fig. 6 is a plan view of the clamped state, Fig. 7 is a plan view of the guide rail section, Fig. 8 is a slope view showing an embodiment of the configuration, Fig. 9 is a bottom view of the same, Fig. 10 A9B1 is an explanatory diagram showing the operating state of the presser ruler piece, and FIG. 11 is a plan view of the guide rail part. 1...Sliding frame body, 2...Thin bottom plate, 3.
... Sewing machine body, 4 ... Presser foot ruler piece, 7
...Sewing width ruler piece, 10.10'...
Guide pin, 11...Table part, 13.13
'...Guide rail, A... Sewn fabric, A
'... Seam shape, a... Curve.

Claims (1)

[Scope of utility model registration request] A sliding frame 1 that can freely slide in the sewing feed direction of the sewing machine body 3 is installed on a placing plate 12 set on a table part 11, and is located on one side of the sliding frame 1 that is the sewing side. A holding member 6 having a curve a corresponding to the seam shape is attached to support pieces 4', 4' whose front and rear ends are rotatable on the thin bottom plate 2 having a curve a' corresponding to the seam shape. A guide pin 1 protrudes from the lower surface of the other side of the sliding frame 1, which is the opposite side to the sewing side, with the presser foot ruler pieces 4 facing each other in a freely openable manner.
0.10' is fitted into a guide rail 13.13' which is longitudinal in the sewing feed direction and is carved on one side of the placing plate 12,
Further, the dart sewing attachment has a curve 13a corresponding to the seam shape formed at least in a portion of the guide rail 13 located near the sewing machine main body 3.