JPS62615Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to a needle plate in a side split sewing machine that folds back the ends of two pieces of fabric above and below the sewn part after the sides of the pieces have been sewn together, and that is designed to guide the end of the lower fabric by folding it back.

For example, when sewing the sides of slacks, conventional sewing machines only had the ability to simply overlap two pieces of fabric one above the other and sew them together. To achieve the final finish, ironing must be done by many people, which inevitably increases costs due to labor costs, and because it is done by hand, the folds are meandering, making it impossible to provide a uniform and elegant product. I couldn't do it.

In view of these drawbacks, the present invention has been developed in a side-splitting sewing machine that sews the ends of two pieces of fabric by folding them back and sewing them together. The upper guide pieces are integrally formed, and the upper guide pieces are arranged parallel to each other at positions above the lower guide pieces so as to have an interval for inserting the lower cloth, and the ends of the upper guide pieces are provided with feeding grooves. In order to solve the above-mentioned drawbacks, the throat plate formed with a guiding piece extending downward in an inclined manner automatically folds back and guides the end of the lower cloth. An embodiment of the present invention will be described based on the drawings. Reference numeral 1 denotes a side splitting device, which includes a sewing folding section 4 that stitches fabrics 2 stacked one above the other and folds back the fabric ends of the stitching section 3, respectively; It consists of a finishing section 5 which opens the stitched section 3 of the stacked fabrics 2 during transportation and finishes the stitched section 3 with heat and pressure.

The sewing turn-back section 4 is a cloth insertion section, and a partition plate 9 is disposed to separate the upper cloth 7 and the lower cloth 8 of the cloth 2 to be sewn into upper and lower parts. A presser foot 13 is disposed at a position facing the upper surface of the sewing position 10 and the cloth feed position 11 to press the upper cloth 7 and the lower cloth 8 between the needle plate 12. The front part of the presser foot 13 is raised at an angle to form a sandwiching section 14 for the upper cloth 7. The partition plate 9 and the presser foot 13 are supported by supports 15,
The presser foot is attached to a presser foot mounting rod 18 of a sewing machine body 17 via a presser foot 16.

Note that 19 indicates suture position 1 where the sewing machine needle 20 is inserted.
This is a needle groove formed at 0.

Further, the throat plate 12 is attached to the base plate 21 of the sewing machine body 17, and has a feed groove 22 cut out at a location corresponding to the cloth feed position 11, and a needle hole 23 provided through the needle hole 23 at a location corresponding to the sewing position 10. A plate-shaped lower guide piece 24 is integrally formed at a position facing the lower part of the partition plate 9 from the upper surface of the needle plate 12 in the cloth feeding direction and then slopes downward inside. The upper guide pieces 25 are arranged parallel to each other with a sufficient distance to allow the lower cloth 8 to be inserted therein, and the base end of the upper guide pieces 25 is raised slightly above the upper surface of the throat plate 12. A lower cloth insertion opening 26 is formed therein, and a guide piece 27 whose tip extends downwardly of the feed groove 22 in an inclined manner is formed at the end on the cloth feeding direction side.

Reference numeral 28 denotes a guide member, which is disposed on the base plate 21 so as to extend from the rear of the sewing position 10 in the cloth feeding direction so as to contact and guide the two sides of the seam portion 3 of the upper cloth 7 and the lower cloth 8. At the distal end of the guide member 28, an outwardly curved guide piece 30 is formed to guide the end 29 of the upper cloth 7 upwardly, and the feed groove of the throat plate 12 is formed from the upper end of the guide member 28. A folding guide 31 is integrally provided over the upper part of the upper fabric 7, and the folding guide 31 extends over the upper part of the upper cloth 7.
9 is guided so as to turn around in sequence.

Reference numeral 32 denotes an electric heating element attached so as to come into contact with the rear surface of the guide member 28, and the heating effect of the electric heating element 32 causes the guide member 28 to be heated.

Also, the electric heating element 3 at a position in front of the guide member 28
At the bottom of the proximal end of 2, there is a guide plate 33 which is formed upright so as to guide the end 29 of the upper cloth 7 to the guide piece 30. The folding width of the thin, loose fabric can be adjusted by the guidance of the guide plate 33.

Reference numeral 34 denotes a cloth feeding mechanism, in which a U-groove 39 at one end of a feeding base 38 is engaged with the tip of a vertical feeding body 36 attached to a rotating shaft 35 via a daruma 37;
The other end of this feed base 38 is linked to the rotation shaft 40.
1, and the feed base 38 is moved along a predetermined feed trajectory by predetermined reciprocating rotation of the rotation shafts 35 and 40.

A main feed dog 42 is attached to the upper surface of the feed base 38 that passes through the feed groove 22 of the throat plate 12 at the cloth feed position 11 and reaches the lower surface of the presser foot 13.
Guide teeth 44 are provided at the tips of the upper cloth 7 and the lower cloth 8, which are located at a certain distance behind the pumping position 43 at corresponding locations.
An auxiliary feed dog 47 is installed between the main feed dog 42 and the guide 45 to reach a lifting position 46 between the cloth feed position 11 and the pressure feed position 43 on one side of the feed base 38. It is mounted so as to be slidable up and down via a guide bracket 48 attached to it.

Also, on one side of the feed base 38 are large and small levers 49,50.
are installed in series with pins 51 and 52, and
one end of each lever 49, 50 is engaged with each other,
The other end of the small lever 50 is fitted into the groove 53 formed at the base of the auxiliary feed dog 47, while the large lever 4
The other end of the lever 9 is fitted into the guide groove 55 of the operation plate 54 attached to the lever 37 of the vertical feeder 36 via the pin 56, and the lever 4 is
The auxiliary feed dog 47 is configured to move up and down via the feed gears 9 and 50.

Reference numeral 57 designates a puller mechanism section provided at the pressure feeding position 43, which allows a puller mounting rod 58 to hang down in a vertically movable manner behind the presser foot mounting rod 18 on the sewing machine body 17, and connects the lower end of the puller mounting rod 58 to the sewing machine body 17. A spring 59 is press-fitted between the puller mounting rod 58 and the puller mounting rod 5 to maintain the lowered position.
The center portion of a puller bracket 60 is pivotally connected to the lower end of the puller bracket 60, and the upper end of the puller bracket 60 is pivotally connected to the presser foot attachment rod 18, so that the upper and lower ends of the puller bracket 60 are linked to the vertical movement of the presser foot 13 in conjunction with the feeding action of the main feed dog 42. The puller bracket 60 is moved to the puller mounting rod 58 by vertical movement of the presser foot mounting rod 18.
58 is used as a fulcrum for vertical swinging motion.

Reference numeral 61 denotes a puller rotatably supported by the puller bracket 60, which is positioned opposite to the plate 62 provided on the substrate 21 at the pumping position 43, and is configured to move in conjunction with the vertical swing of the puller bracket 60. are doing.

Reference numeral 63 denotes a drive unit, which is connected to the main shaft 6 of the sewing machine main body 17.
4 is provided with a rotary shaft 67 that is rotationally interlocked via a belt 65 and a pulley 66, and a drive shaft 71 that is rotatably interlocked with deceleration rotation via pulleys 68, 69 and a belt 70 is attached to the rotary shaft 67 at a universal joint 72.
The puller 61 is connected to the central shaft 73 of the puller 61 via the puller 61 so as to rotate the puller 61 in the cloth feeding direction.

Note that 74 is a guide roller disposed between the sewing position 10 and the pressure feeding position 43.

Next, to explain the function of the throat plate in the side splitting sewing machine according to the present invention, first, the suture folded portion 4
, the upper fabric 7 of the fabric 2 to be stitched is polymerized.
At the same time, the lower cloth 8 is passed under the partition plate 9 and inserted under the presser foot 13 in the same way as the upper cloth 7, and the end of the lower cloth 8 is The portion 75 is inserted between the upper guide piece 25 and the lower guide piece 24 that protrude from the fabric insertion portion 6, and is brought under the throat plate 12.

When sewing is started from this state by operating the sewing machine main body 17, the upper cloth 7 and the lower cloth 8 are sewn together at the sewing position 10, and the cloth feed mechanism 34
Due to the action of the main feed dog 42, the feed groove 2 of the throat plate 12
2 and moves parallel in the cloth feeding direction to sequentially transfer the upper cloth 7 and the lower cloth 8 which are sandwiched between the presser foot 13 and the edge 29 of the upper cloth 7.
As it progresses as shown in FIG. 5, it is first raised by the guide plate 33, and then by the guide piece 30.
It is sequentially folded back at the folding guide 31 while being guided by the folding guide 31 .

On the other hand, the end 75 of the lower cloth 8 advances while being guided between the lower guide piece 24 and the upper guide piece 25 so as not to be caught in the shuttle as shown in FIG.
Since the tapered guide piece 27 changes the trajectory of movement toward the sewing position 10, the end 75 of the lower cloth 8 is forced to slide against the underside of the lower cloth 8 and is folded back in two outward. Then, as shown in FIG. 4, when the cloth feed mechanism 34 performs a feeding operation, the auxiliary feed dog 47, which is linked via the levers 49, 50, moves upward in accordance with the upward swing of the upper and lower feed bodies 36. As a result, the end 75 of the lower cloth 8 is lifted up to the surface of the needle plate 12 at the lifting position 46. Furthermore, the end 75 is guided sequentially onto the plate 62 at the pressure-feed position 43 by the guide 45, which is located behind the auxiliary feed dog 47 and linked to the main feed dog 42.

Further, the upper cloth 7 and the lower cloth 8 after being stitched and folded together at the lifting position 46 are guided by the guide member 28 on the side of the stitched portion 3 while the electric heating body 32
A fold is added by the guide member 28 heated by the action of 43, and as the puller 61 rotates in the cloth feeding direction, the upper cloth 7 and the lower cloth 8 are forcibly pulled and fed in the cloth feeding direction as one body. be.

In short, the present invention uses a side-splitting sewing machine that sews the ends of two pieces of fabric while folding them back, and has a plate-shaped lower guide piece 24 on the throat plate 12 that slopes downward from the upper surface toward the fabric feeding direction.
are formed integrally with each other, and upper guide pieces 25 are arranged parallel to each other at positions above the lower guide pieces 24 so as to have an interval for inserting the lower cloth 8, and the ends of the upper guide pieces 25 are provided with tips. feed groove 2
Since the guide piece 27 is formed to extend downwardly in an inclined manner, the end 75 of the lower cloth 8 is held between the lower guide piece 24 and the upper guide piece 25 in the process of sewing. In the process of separating and guiding, the end portion 7 is automatically guided by the guiding piece 27 in sequence.
5 can be folded back, and the side parting of the fabric 2 can be automated, so the conventional process of manually ironing the folds after stitching can be completely omitted, contributing to significant labor savings. In addition to this, since the folds are added mechanically, the practical effects are great, such as being able to provide an elegant product with uniform folds.

[Brief explanation of the drawing]

The figure shows one embodiment of the present invention.
The figure is a perspective view of the sewing folded part, Figure 2 is a perspective view of the finished part, Figure 3 is a front view of Figure 1, Figure 4 is a back view of the same as above, Figure 5 is how the upper fabric is guided by the presser foot. Figure 6 is a perspective view of the throat plate and feed base;
7 is a perspective view of the state in which the lower cloth is guided by the throat plate, FIG. 8 is a perspective view of the throat plate, FIG. 12 is an enlarged view of the main parts of the same, FIG. 13 is a plan view of the same, and FIG. 14 is a diagram showing the fabric finishing process. 2...Fabric, 8...Lower fabric, 12...Throat plate, 24
...Lower guide piece, 25...Upper guide piece, 27...
Guide piece.

Claims (1)

[Scope of utility model registration request] In a side split sewing machine that stitches the ends of two pieces of fabric while folding them back, a plate-shaped lower guide piece is integrally formed on the throat plate, and the lower guide piece is integrally formed on the throat plate, and the plate-shaped lower guide piece extends from the upper surface toward the cloth feeding direction and then slopes downward inside. Upper guide pieces are arranged parallel to each other at positions facing above the guide pieces so as to have an interval for inserting the lower cloth, and the ends of the upper guide pieces are slanted with their tips pointing downwards into the feed groove. A throat plate for a side splitting sewing machine, characterized in that an extending guide piece is formed.