JPS5841916Y2 - sewing machine separation guide - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an improvement of a separation guide in a sewing machine.

In general, sewing machines are known that have devices designed to prevent relative misalignment, or sagging, between two pieces of fabric to be sewn together.

This type of anti-seam device generally uses a weighted clamper to clamp the ends of the fabric overlappingly, and during sewing, the fabric moves forward while pulling the weight, thereby applying tension to the fabric in the opposite direction to the sewing direction. The clamper is configured to be automatically removed from the fabric before sewing is completed.

In such a sewing machine, the clamper must be released as close to the sewing machine needle as possible in order to shorten the sewing distance from when the clamper is released to the end of sewing.

That is, it is desirable to keep the clamper attached until the end of sewing as much as possible to apply tension to the fabric.

However, this type of sewing machine is generally equipped with a separation guide in front of the sewing machine needle that separates and guides two pieces of fabric before sewing, so if you try to release the clamper as close to the sewing machine needle as possible, this separation guide The length along the fabric feed direction must be kept as short as possible.

However, if the length of such a separation guide is shortened, the area for guiding the fabric becomes smaller, resulting in various problems.

For example, if the fabric is a highly elastic knit with a convex curved edge, the convex curved part tends to curl because it is pulled by the anti-seize device during sewing movement. If the guide area of the separation guide is small, it will not be possible to prevent the curling of the convex curved portion, and the sewing operation of the convex curved portion will become impossible or the stitching will be extremely poor quality.

An object of the present invention is to provide a separation guide which allows the clamper to be released at the position closest to the sewing machine needle and which also allows sewing of convex curved portions of highly stretchable fabric.

An embodiment of the present invention will be described in detail with reference to the drawings. First, in FIG. 1, reference numeral 10 is a sewing machine table on which, for example, two pieces of fabric (not shown) to be sewn are placed.

The fabric is fed in the direction indicated by arrow Y over the sewing machine table by an advancement mechanism (not shown) including a feed dog in the sewing machine.

Along with this feeding, tension is applied to the fabric by the anti-sag device as described above.

That is, this anti-corrosion device includes, for example, a clamper (not shown) that clamps the end of the sewing product, and a weight (not shown) that applies tension to the clamper in a direction opposite to the feeding direction of the sewing product. .

Immediately before the main separating guide, this clamper is released from the workpiece by any means known in the art.

Reference numeral 11 denotes a sewing machine needle that sews fabric in cooperation with an advance mechanism; 1;
2 is a presser foot, 13 is a sensor that detects the edge of the fabric, and 14 is a manipulator that correctly controls the edge of the fabric in response to this sensor.

These mechanisms are well known and will not be described in detail.

A separation guide 15 is provided in front of the sewing machine needle 11 along the fabric feeding direction Y, and this separation guide includes a main separation guide 16 located near the sewing machine needle and a main separation guide 16 located on the opposite side of the main separation guide from the sewing machine needle. It is separated from the auxiliary separation guide 17 arranged adjacent to the side surface.

Although the main separation guide and the auxiliary separation guide have different shapes, they have the same components.

That is, these separation guides include a lower middle plate 18 placed on the surface of the sewing machine table 10, a separation plate 19 placed on the upper surface of this lower middle plate, an upper middle plate 20 placed on this separation plate, and a lower middle plate 18 placed on the surface of the sewing machine table 10. Upper plate 21 placed on the upper middle plate
and has.

The main separating guide assembly is fixed to the sewing machine table 11 by, for example, two bolts 22.

However, it should be noted that the auxiliary separation guide 17 is
0 allows it to slide on the sewing machine table in a direction transverse to the fabric feeding direction.

That is, the assembly of the auxiliary separation guide is supported on the front bracket 31 by bolts 32, and this front bracket has two
It is fixed to the front ends of two slide rods 33 extending in parallel, and the rear ends of the slide rods are slidably fitted into bearings 35 provided on the rear bracket 34.

The rear bracket 34 is fixed to the table 10 with a bolt 37 via a spacer 36.

For example, an air cylinder 38 that drives the auxiliary separation guide 17
is fixed to the rear bracket 34, and the tip of the piston rod 38a of this air cylinder is fixed to the front bracket 31.

Therefore, from the position shown by the solid line in FIG.
When the piston rod 38a is retracted, the auxiliary separation guide moves in the direction shown by X in FIG. It is possible to move in the direction shown by and return to the original position shown by the solid line adjacent to the main separation guide.

In this retracted position, the auxiliary guide is out of the path of the clamper and therefore does not interfere with the movement of the clamper.

Therefore, when sewing a fabric such as knit that has a convex curved edge, the auxiliary separation guide 17
is positioned adjacent to the main separation guide 16 to function as a separation guide of sufficient size to prevent the convex curve from curling and to allow the auxiliary separation guide 17 to escape to the retreat position as described above when the convex curve has been sewn. This makes it possible to prevent interference with the clamper of the anti-sewing device and to apply tensile force to the fabric until just before the end of sewing.

According to the present invention, as described above, it is possible to maximize the function of the clamper of the anti-seizing device, and it has an excellent advantage that it is possible to sew convex curves of highly elastic fabrics or fabrics that tend to curl easily.

[Brief explanation of the drawing]

Figure 1 is a plan view of the main parts of a sewing machine to which the separation guide according to the present invention is applied, Figure 2 is its front view, and Figure 3 is A of Figure 1.
- It is an elevational view seen from the A line. 11... Sewing machine needle, 15... Separation guide, 16... Main separation guide, 17...
Auxiliary separation guide, 30... Drive mechanism.

Claims (1)

[Scope of utility model registration request] A separation guide that is placed in front of the sewing machine needle along the kneading direction of the sewing material and separates and guides the sewing material, and a clamper that clamps the end of the sewing material and pulls the sewing material in the opposite direction to the feed direction. In the sewing machine, the separation guide includes a main separation guide fixedly arranged adjacent to the sewing machine needle, and an auxiliary separation guide arranged adjacent to the main separation guide on the opposite side from the sewing machine needle, The auxiliary separation guide is movable between a position adjacent to the main separation guide and a retracted position away from the main separation guide and out of the path of the clamper, and the auxiliary separation guide moves to the retracted position when the clamper approaches. A separation guide for a sewing machine, characterized in that: