JPS645589Y2 - - Google Patents

Description

[Detailed explanation of the invention] The conventional zigzag hem stitch presser foot does not have the hem stitch ruler plate set up to the center of the needle passage hole, so when sewing the hem of fabric with a sewing machine, it is difficult to The edges of the fabric moved from side to side and became irregular, making it difficult to sew them neatly to a certain width.

Therefore, the following edge-stitching presser foot, which is one step more advanced than this, has emerged. Figure 1 of the attached drawings,
What is shown in FIG. 2 shows its configuration. This edge stitching presser foot has a needle passage hole 2 provided approximately in the center of the presser foot body 1, a groove 3 that communicates with the needle passage hole 2 and opens at the rear end, and a vertical groove made of metal or synthetic resin. Edge sewing ruler board 4 with wall part
is inserted and fixed to the presser foot body 1 with screws 6, and the tongue-shaped portion 5 at the front of the ruler plate 4 is set at the center of the needle passage hole 2.

When sewing a zigzag using the above-mentioned edge stitching foot, the edge of the fabric is kept constant by the function of the ruler plate 4, which has a tongue-shaped portion 5 at the front that extends up to the center of the needle passage hole 2. Even if external forces such as vibrations or shocks from the sewing machine are applied during edge sewing, there is no risk of the edge of the fabric moving left or right, eliminating skipped stitches, sagging fabric, and uneven edges of the fabric. The effects of this method, such as the fact that anyone can easily and beautifully sew edges regardless of how thick or thin the fabric is, cannot be overlooked.

Usually, a zigzag sewing machine is equipped with a stitch baseline setting mechanism, and by operating a normally graduated dial, a left baseline, middle baseline, etc. can be set, and zigzag stitches or straight stitches can be performed. Now, when performing straight stitching with the center baseline set, the needle moves up and down the center position of the hem stitching foot, so when moving the needle, the ruler plate 4 located at the center of the needle passage hole 2 will move up and down. There was a risk that the tip of the needle would come into contact with the tongue-shaped portion 5, causing not only the needle to break, but also pieces of the broken needle to fly out, causing damage to the eyes of the worker. Therefore, when performing sewing work with a sewing machine with a center baseline set, it is not only extremely dangerous to use the above-mentioned conventional hem stitch presser foot, but also makes it impossible to perform the intended sewing work. There were some problems, such as not being able to do it.

A similar problem occurs when zigzag stitching is performed with the left baseline set.

Furthermore, when setting the baseline, the operator may accidentally operate the setting dial or the like, causing the needle to come into contact with the tongue portion 5 during hand movement, resulting in the dangerous situation described above.

Therefore, the invention of this application has problems such as those mentioned above.
It was devised to overcome this danger, and is an improvement to the tongue-shaped part of the ruler plate of the edge-stitching presser foot.

The improvement is that a needle window is provided approximately in the center of the tongue-shaped portion of the ruler plate.

The shape and position of this needle window are as shown in the accompanying drawings, FIGS. 3 to 6. That is, a needle window h is formed approximately at the center of the tongue-like portion 5 along its longitudinal direction to match the shape of the needle. Therefore, when the sewing machine is set to the middle baseline or left baseline,
Even if the sewing machine needle comes into contact with the center of the tongue 5 during operation, it is configured to pass through the needle window h provided in the tongue 5, so as in the conventional example, There is no risk of the needle coming into contact with the tongue and causing the needle to break.

Furthermore, even if the needle is moved so that it is in contact with the tongue portion 5 due to an operator's error in operating the dial for setting the baseline, the needle will pass through the needle window as described above, so there will be no problem. Able to perform work.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway front view of a conventional hem stitch presser foot for a zigzag sewing machine. FIG. 2 is a plan view of FIG. 1.
FIG. 3 is a partially cutaway front view of an embodiment of the hem stitch presser foot for a zigzag sewing machine according to the present invention. FIG. 4 is a plan view of FIG. 3. FIG. 5 is a bottom view of the same as above. Figure 6 is a plan view of the ruler board. Figure 7 is a front view of the same as above. FIG. 8 is a plan view showing the relationship between the needle window provided in the tongue-like part of the zigzag hem stitch presser foot according to the present invention and the center base line. 1 is the presser foot body, 2 is the needle passage hole, 3 is the groove, 4 is the ruler plate, 5 is the tongue, 6 is the screw, and h is the needle window.

Claims (1)

[Scope of utility model registration request] Needle passage hole 2 provided approximately in the center of presser foot body 1
The groove 3 has a groove 3 that communicates with the needle passage hole 2 and is open at the rear end, and a tongue-shaped portion 5 that is integrally fixed to the front portion of a ruler plate 4 having a vertical wall portion. In the edge sewing presser foot, the ruler plate 4 is fixed to the presser foot body 1 so that the tongue 5 is set at the center of the needle passage hole 2 while the ruler plate 4 is inserted. A hem stitch presser foot for a zigzag sewing machine, characterized in that a needle window h is bored in the zigzag sewing machine.