JPS6232547Y2 - - Google Patents

Description

[Detailed explanation of the invention] (Purpose) The invention relates to a straight line presser foot for a zigzag sewing machine. To provide a presser foot that can prevent an accident of colliding with the presser foot and prevent poor sewing due to insufficient presser foot.

(Prior art) When performing straight stitches using a conventional zigzag sewing machine, the sewing machine has an elongated needle drop hole whose longitudinal edges are the front and rear edges of the zigzag width perpendicular to the cloth feeding direction. A so-called basic presser foot was used, but when using this presser foot to perform straight stitches, the needle drop hole was large, so there was not enough presser foot at the needle drop point, leading to accidents such as skipped stitches and thread breaks. Something happened.

For this reason, when sewing straight lines, it is preferable to use a presser foot having a needle drop hole large enough to allow the needle to pass through the straight needle drop part, as shown in a plan view in FIG.

However, when a presser foot like the one described above is used as a straight line presser on a zigzag sewing machine, if the machine user makes the mistake of selecting zigzag stitches even though a straight line stitch presser is attached, This is extremely dangerous as the needle may collide with the presser foot.

For this reason, in straight stitching using a conventional zigzag sewing machine, a basic presser foot having an elongated needle hole with a zigzag width has been used, ignoring the above-mentioned sewing defects.

In recent years, high-end sewing machines have connected a needle plate needle hole reduction device to the straight-line/zigzag switching dial, and when performing straight stitches, the needle hole in the throat plate is reduced, so the needle dropout hole in the presser foot is reduced. It is now possible to perform good sewing even when the presser foot is large and insufficient.

However, in low-grade sewing machines, it is difficult to install a device to reduce the needle hole in the throat plate as described above due to cost considerations, so the sewing machine still uses a presser foot with a large needle hole to perform straight stitches. The problem of defects remains.

In view of the above-mentioned current situation, this invention prevents the accident of the needle colliding with the presser foot due to incorrect dial operation when performing straight stitches using a zigzag sewing machine, and also prevents poor sewing due to insufficient presser foot. This was created as a result of intensive research to find a suitable presser foot.

(Structure) In other words, the present invention is a presser foot used for straight stitching in a zigzag sewing machine, which has a long hole having the front and rear edges of the zigzag width perpendicular to the cloth feeding direction as longitudinal edges. A presser foot for a sewing machine, characterized in that a needle drop hole of the shape of the shape is bored, and a protruding part whose front edge is close to the rear edge is formed at a position adjacent to the straight stitch needle drop of the needle drop hole. More details are as described below based on examples.

FIG. 1 is a top view showing an embodiment of the present invention, FIG. 2 is a perspective view thereof, and FIG. 4 is a bottom view thereof.

This embodiment is a straight sewing presser foot used in a zigzag sewing machine with a left base line. The left end portion, which is the base line position, of the elongated needle drop hole 1 having a needle drop hole 1 having a needle drop hole 4 and a rear edge 5 serves as a needle drop portion 2 for straight stitching.

Therefore, in this presser foot, the front edge 4 on the front side in the cloth feeding direction has a slight gap at the tip at the rear edge 5 on the cloth feeding direction side at a position adjacent to the right side of the straight sewing needle drop part 2. A protruding protrusion 3 is formed close to the state.

In the case of a sewing machine with a right base line or a middle base line, it is possible to easily form a straight stitch presser foot in the same way as in the case of the left base line sewing machine. In the case of the center base line, a protruding part is formed at a position adjacent to the left side of the straight sewing needle drop part in the center of the needle drop hole by protruding the front edge close to the rear edge.

(Effects) When performing straight stitches on a zigzag sewing machine using the presser foot of the present invention, the presser foot works well due to the effect of forming a protrusion on the leading edge of the needle droplet at a position adjacent to the straight needle droplet. As a result, it is possible to obtain a good quality sewn product without skipping stitches, thread breakage, etc.

For example, when performing straight stitches using a zigzag sewing machine that has a needle drop on the left base line and is equipped with a half-rotation hook, if the presser foot shown in the above embodiment is used, the presser foot can be used when the amount of displacement is small. The effect was great and an extremely good quality sewn product could be obtained.

In addition, by using the presser foot of this invention, even if you accidentally perform a zigzag stitch while sewing a straight line, there is no chance of the needle colliding with the presser foot, and at the same time, you can easily clean up the rest even if you continue sewing. can be done.

In other words, if the purpose is simply to avoid a collision between the needle and the presser foot in the event of incorrect operation of the sewing machine, a zigzag needle drop hole should be provided close to the straight needle drop hole as shown in the top view in Figure 5. You can also consider using a presser foot, but in this case, if you continue sewing with the needle swinging in a zigzag pattern, the presser foot will get tangled with thread, making it difficult to clean up afterwards.

On the other hand, in the case of the presser foot of the present invention, the protruding part of the front edge of the needle drop hole has a slight gap with the rear edge, so even if a zigzag sewing operation is performed by mistake, the presser foot This allows you to continue sewing without any thread tangles, and it is easy to clean up afterwards.

As mentioned above, the present invention makes it possible to obtain a good sewn product without any trouble during straight stitching using a zigzag sewing machine, and its effects are extremely large.

[Brief explanation of the drawing]

Fig. 1 is a top view showing an embodiment of the present invention, Fig. 2 is a perspective view thereof, Fig. 4 is a bottom view thereof, Fig. 3 is a conventional example, and Fig. 5 is a top view of a comparative example. 2 is a needle drop hole, 2 is a straight stitch needle drop part, 3 is a protrusion of the front edge, 4 is a front edge, and 5 is a rear edge.

Claims (1)

[Scope of utility model registration request] A presser foot used for straight stitching in a zigzag sewing machine, which has an elongated needle drop hole having the front and rear edges of the zigzag width perpendicular to the cloth feeding direction as longitudinal edges. A presser foot for a sewing machine, characterized in that a protruding portion is formed at a position adjacent to a straight sewing needle drop portion of the needle drop hole, the tip of the leading edge being close to the trailing edge.