JPS635675Y2 - - Google Patents

Description

[Detailed description of the invention] This invention is an overlocking sewing machine that can automatically align not only straight edges but also curved edges of the cut fabric with the guide wall that guides the cut fabric to the feed mechanism to sew the edge by using air pressure. The structure of the cutting cloth guide device will be described in detail with reference to the accompanying drawings as follows.

A guide wall 5 for feeding the cut cloth 1 along with one side edge thereof is provided on a feed table 4 in front of a feed mechanism 3 of a sewing machine 2 that sends the cut cloth 1 forward.

A presser guide plate 6 is provided on the guide wall 5 to prevent the cut cloth 1 from flapping.

The drawing is slightly thicker than the cut cloth 1 for overcasting, 4
A spacer plate 7 in the shape of a quarter circle and a presser guide plate 6 made of transparent thick plastic material in the shape of a quarter circle with a larger diameter than the spacer plate 7 are stacked on top of each other, and the feeding mechanism is operated by two screws 8 and 8'. 3, and the curved side wall of this spacer plate 7 is used as the guide wall 5.

An air passage 9 is provided in this presser guide plate 6.
This air passage 9 is provided in communication with a vertical blow-off hole 10 which is opened at the center of the lower surface of the presser guide plate 6 and is perpendicular to the surface of the presser guide plate, and a fabric gathering hole 11 which is diagonally downward toward the guide wall 5. .

The drawing shows an air passage 9 perforated horizontally from the side wall of a presser foot guide plate 6 formed in the shape of a transparent quadrant of wall thickness, and one vertical air outlet perforated vertically from the lower surface in the center of the presser foot guide plate 6. Similarly to the holes 10, two fabric gathering holes 11, which are bored diagonally downward from the lower surface toward the guide wall 5 in the center of the presser guide plate 6, are connected to the air passage 9, and the presser foot near the feed mechanism 3 is also connected to the air passage 9. An auxiliary air passage 12 is bored in the guide plate 6 substantially parallel to the air passage 9, and the auxiliary air passage 12 is held down by a quadrant-shaped feed mechanism 3 for the guide plate 6.
It is opened in the side wall and communicated with two cloth feed holes 13 which are opened diagonally downward in the direction in which the cut cloth 1 travels. Air is fed into the air passage 9 and the auxiliary air passage 12, and the air released from the vertical blow-off hole 10 presses the cut cloth 1, and the air released from the cloth gathering hole 11 pushes the edge of the cut cloth 1 into the guide wall 5. The cut cloth 1 in the vicinity of the feed mechanism 3 is pressed down by the air blown towards the cloth feed hole 13 and released from the cloth feed hole 13.

In the figure, 14 is an auxiliary guide plate for the cut cloth 1, 15 is an air inlet pipe, 16 is a presser rod that presses and feeds the cut cloth 1, 17 is a presser mechanism that holds down the finished cut cloth, and 18 is a cutter on the feeding table 4. This is a cloth floating hole that blows out air so that the cloth 1 moves smoothly.

In the process of manufacturing clothing, there is a process to prevent fraying of the edges of the cut fabric.

This hem stitching uses a commercially available hem stitching machine, but in this case, at the same time as feeding the cut fabric, hold the edge of the cut fabric with your hand and turn the hem with your hand to prevent it from bending. I was walking around the corner. In this case, you don't need to be so careful when making edge stitches on straight sections, but when making edge stitches on curved sections, you need to be careful not to let the sewing machine come off. Since this requires a lot of stress on the workers, the work efficiency decreases, and as a result, mass production is not possible.

The present invention solves such drawbacks, and since it is configured as described above, for example, when cutting the cloth 1 for pants as shown in the drawing, the sewing machine 2 can be cut while the sewing machine 2 is in operation. When the cloth 1 is inserted between the feed table 4 and the presser guide plate 6, one edge of the cut cloth 1 is sandwiched between two planes, the lower surface of the presser guide plate 6 and the upper surface of the feed table 4, and almost It is held flat without flapping.

Moreover, the cut cloth 1 is pressed against the upper surface of the feed table 4 by the air blown out from the vertical blow-off hole 10 perpendicular to the presser guide surface, which is opened at the center of the lower surface of the presser guide plate 6.

In this case, the air blown out from the vertical blow-off hole 10 spreads uniformly over the feed table 4 and flows out from the periphery of the guide plate 6, so that the cut cloth 1 can be pressed onto the feed table 4 over a wide area by the air. Cut fabric 1 in good condition without curling or flapping
It can be fed into the feed mechanism 3 with the .

Furthermore, the air blown out from the fabric holding hole 11 opened in the center of the lower surface of the presser foot guide plate 6 and provided diagonally downward toward the guide wall 5 is blown out from the presser foot guide plate 6.
The lower cut cloth 1 is blown toward the guide wall 5, and one side edge of the cut cloth 1 always follows the guide wall 5.

That is, the cut cloth 1 is fed into the feeding mechanism 3 in an extremely desirable state with one side edge following the guide wall 5 without flapping, and the one side edge is hemmed.

By adjusting the air pressure depending on the material, thickness, etc. of the cut cloth 1, the cut cloth 1 can be attached to the guide wall 5 just right, and the spacer plate 7 can be adjusted according to the thickness of the cut cloth 1. All you have to do is replace it.

In this way, the cut cloth 1 is attached to the guide wall 5 side by the air pressure from the cloth gathering hole 11 opened on the lower surface of the presser guide plate 6, so even if the cut cloth 1 has a curve, one edge of the cut cloth 1 is always guided. Since it is attached to the wall 5, even the cut cloth 1 having a curve can be reliably edged.

Moreover, the presser guide plate 6 prevents the cut cloth 1 from flapping, and also presses the cut cloth 1 by the air pressure released from the vertical blow-off hole 10 opened on the lower surface of the presser guide plate 6, so that the cut cloth 1 can be fed smoothly. Therefore, the cut cloth 1 moves smoothly, and even the cut cloth 1 having an extreme curve can be reliably edged.

Furthermore, an auxiliary air passage 12 is bored in the presser guide plate 6, and this auxiliary air passage 12 is inserted into the presser guide plate 6.
Since the cloth feed hole 13 is opened in the side wall of the feed mechanism 3 side and is bored diagonally downward in the direction of movement of the cut cloth 1, the air blown from the cloth feed hole 13 causes the air to flow in the vicinity of the feed mechanism 3. The cut cloth 1 is held down and is prevented from flapping, especially at the front edge of the cut cloth 1 at the beginning of feeding.At the same time, the cut cloth 1 is introduced in the advancing direction by air pressure. You will be guided,
The cut cloth 1 can be fed into the feeding mechanism 3 more efficiently and reliably. Furthermore, since the presser foot guide plate 6 is transparent, it is possible to easily check the contact between the guide wall 5 and the edge of the cut cloth 1, and the cloth can be guided more accurately. This makes it easier to detect debris clogging in the passage.

In this way, the present invention allows one end of the cut cloth 1 to be inserted into the lower side of the presser guide plate 6, and then the edge of the cut cloth 1 can be wrapped from the other side without using any hands.
Since all you have to do is wait for the machine to be sent out, even non-skilled workers can improve their work efficiency and have excellent practical effects, such as being able to prepare for other work during this waiting time. It is.

[Brief explanation of drawings]

FIG. 1 is a front view of the device, FIG. 2 is a plan view of the main parts, and FIG. 3 is a sectional view taken along line A-A. 1... Cutting cloth, 2... Sewing machine, 3... Feeding mechanism, 4... Feeding table, 5... Guide wall, 6...
Presser guide plate, 9...air passage, 10...vertical blow-off hole, 11...cloth gathering hole, 12...auxiliary air passage, 13...cloth feeding hole.

Claims (1)

[Scope of utility model claims] A spacer plate having a guide wall slightly thicker than the thickness of the cut fabric and having a curved edge shape for feeding the cut fabric along with one side thereof is provided on the feed table in front of the feed mechanism of the sewing machine that feeds the cut fabric forward, A thick transparent presser guide plate is provided on this spacer plate to prevent the flapping of the cut cloth, and an air passage is provided in the horizontal direction in the shape of a stop in the horizontal direction. A vertical blow-off hole perpendicular to the surface of the presser foot guide plate and a fabric gathering hole extending diagonally downward toward the guide wall are connected to each other, and an auxiliary air passage is also provided in the presser foot guide plate in the horizontal direction. This auxiliary air passage is opened in the side wall of the presser foot guide on the feed mechanism side and communicated with a fabric feed hole that is bored diagonally downward in the direction of movement of the cut fabric. Air is sent into the auxiliary air passage, and the air released from the vertical blow-off hole presses the cut cloth, and the air released from the cloth gathering hole blows the edge of the cut cloth against the guide wall, and the air released from the cloth feed hole presses the cut cloth. A guide device for cut cloth in an overlock sewing machine, characterized in that the cut cloth is held down near the feed mechanism by a hem.