JPS5831950B2 - Sewing machine equipped with cloth cutting device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a known zigzag sewing machine that is pre-equipped with a cloth cutting device, and its purpose is to cut the right side of the fabric while cutting the edges using zigzag stitches. To provide a sewing machine with high practical value that can easily complete the preparation settings of cloth cutting members required for sewing with one touch.

Now, attempts have been made to create attachments for cutting the edges of fabric in order to create hem edges using the stitches of a regular zigzag sewing machine, but this attachment is attached to the bed of the sewing machine. There was a feeling that there was a lack of research into home sewing machines for use by women and girls, as preparations for sewing machines were troublesome, they were expensive, and they made it difficult to handle cloth.

The present invention eliminates the need for troublesome steps such as installing attachments when preparing to cut cloth.
It is extremely easy to prepare with just a touch of a button, and
Since there are no attachments on the top of the sewing machine's bed that would get in the way of handling cloth, the sewing machine has the unique feature of being able to work with cloth freely on a spacious bed.

Now, as one of the embodiments, Figs. 1, 2 and 3 will be described first.

Reference numeral 15 is a hang part of the main arm of the zigzag sewing machine, and inside thereof, a presser bar 19, a needle bar 18, a thread take-up lever, etc. are still installed.

Now, the mounting bracket 1 holding the small motor 3 is attached to the lamp mounting strip 11 provided on the left surface of the hang part.
1' is fixed, and the motor is installed under the lamp cover 15'.

This mounting bracket forms a sleeve part 1'' extending cylindrically in the axial direction from a part 1' that fits into the track part 3' of the motor. is inserted through the sleeve and serves as a shaft bearing, and a cylindrical part 6 of a rotating bracket 6, 6', 6", 6/// is fitted on the outer periphery of the sleeve, and a vertical plate is inserted from a part of this cylindrical part. A vertical plate 6' extends downwardly, and this vertical plate can be freely pivoted about the sleeve as indicated by the arrow in FIG.

Next, an eccentric cam 4 is fixed to the spindle 3' of the motor, and an outer ring 5 is slidably fitted onto this, and a fork 2 that sandwiches this ring.
, 2 and the pins 2', 2' constitute a universal joint fitting.

Further, a band-shaped upper female member 9 is fixed to this metal fitting with a screw 17.

Further, the lower end of this knife extends to a place where it comes into contact with a fixed knife 12 provided on a throat plate 13 on the sewing machine bed.

Next, this upper knife has a vertically elongated punch hole 8, which engages with a guide horizontal pin 7 fixed to the lower end of the vertical plate 6'. The movement is applied as vertical vibrations of slight amplitude to the cutting edge of the upper knife 9 guided by the pin 7, and the cloth is cut lightly in cooperation with the lower knife in contact with the upper knife.

Reference numeral 16 is a spring provided on a knob 6'' provided on a part of the vertical plate, and is used to bring the upper knife 9 into contact with the lower knife 12.

As mentioned above, the cloth cutting method that applies high-speed micro-vibration to the upper scalpel exhibits the characteristics of high-speed vibration, and exhibits the excellent effect of achieving sufficient cutting with only about 60 grams of sliding pressure between the upper and lower knives. It is something to do.

If you cut the fabric in this way and sew it by placing the right point of the zigzag stitch on the cut edge, you will be able to create a beautiful edge that looks like it was sewn with an industrial overlock sewing machine, so you can use it to create beautiful edges that look like they were sewn with an industrial overlock sewing machine. The zigzag sewing machine now has the function of a lock sewing machine, and its economic value is extremely high.

Now, if you don't want to do the rimming, just grab the knob 6", which is part of the vertical board, and pull it up toward you.

Since the upper knife 9 and the vertical plate 6' can be rotated in the direction of the arrow and retracted to the front of the hang portion 15 of the sewing machine, the field of view in front of the needle bar is widened and the sewing machine can be used freely as a normal sewing machine.

This is a ground-breaking idea that allows overlock stitching or a regular sewing machine by simply setting the position of the strip plate that rotates with the upper knife.

Reference numeral 10 is a stopper pin installed in a part of the mounting bracket 1', and the end faces of the rotating brackets 6, 6'' are brought into contact with each other, and the knife 9 is positioned in the correct position relative to the lower knife 12. It is for the purpose of

In addition, since the fitting between the sleeve 1'' and the rotating metal fitting is frictional, there is no undue movement during operation, and it is possible to adjust the fit using the set screw S. .

As mentioned above, the present invention has a small electric motor installed at the front lower part of the main arm left side of the machine frame of a zigzag sewing machine, and moves up and down in conjunction with the rotation of an eccentric cam installed on the spindle of this motor. The cutting edge of the lower end of the upper knife, which is made to vibrate at high speed, can be brought into contact with the lower knife installed on the throat plate of the sewing machine to cut the fabric, or alternatively, the lower end of the upper knife can be brought into contact with the lower knife installed on the throat plate of the sewing machine. A cloth cutting method characterized in that the upper knife material attached thereto can be rotated upwardly toward the user to avoid withdrawal from the front surface of the needle bar of the sewing machine, which can be performed extremely easily. This is a sewing machine that is pre-equipped with a device.

[Brief explanation of the drawing]

Fig. 1 is a side view of an embodiment of the present invention seen from the pulley side on the right hand side of the sewing machine, Fig. 2 is a front view seen from the front of the sewing machine in use, and Fig. 3 shows the eccentric cam of the motor spindle.
It is a figure which shows the ring which slides on this, a two-pronged metal fitting, and a part of band-shaped knife.

Claims (1)

[Claims] 1. A small electric motor is installed in the lower front of the hang part on the left side of the main arm of the machine frame of the zigzag sewing machine, and it is made to vibrate up and down at high speed in conjunction with the rotation of the eccentric cam installed on the spindle of this motor. Cut the cutting edge at the lower end of the knife,
The lower knife installed on the needle plate of the sewing machine can be installed to cut the fabric, or the vertical plate fitted in the motor support sleeve and the upper knife attached to it can be rotated upwards toward the front. A sewing machine pre-equipped with a fabric cutting device, characterized in that the fabric cutting device can be operated to avoid withdrawal from the front surface of the needle bar of the sewing machine.