JPS6118856Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a cloth presser device equipped with a cloth cutting device and used in a sewing machine.

In a sewing machine equipped with a cloth cutting device, in order to cut the cloth reliably and to ensure that the edges of the cut cloth are neatly trimmed, it is important to hold the cloth near the knife. In an overlock sewing machine, which is generally well known as a sewing machine equipped with a cloth cutting device, the presser foot is biased downward by a spring to press down the cloth near the knife. In this device, the spring is exposed on the presser foot as shown in Figure 1, so it does not get caught on fingers during work, or it obstructs the field of vision when cutting the fabric or watching the seam formation during sewing. In addition, since the spring is provided in a detour so as not to interfere with the operation of the looper, its shape has many bent parts, which causes problems such as a rough appearance that spoils the aesthetics. .

The purpose of the present invention is to provide a presser foot device for a sewing machine that solves these problems.
In the figure, 1 is a support member that is removably attached to the presser foot bar 2 of the sewing machine, 3 is a presser foot that is rotatably attached to the member with a pin 4, and the presser foot is attached to the presser foot. A projecting piece 31 is formed at the center of the rear part thereof, and the support member 1 has a depth that is deep enough to allow the projecting piece 31 to fit on the lower side thereof and to rotate somewhat about the pin 4 as a fulcrum. A groove 5 is formed in the groove 5, and a horizontal hole 6 communicating with the groove 5 from one side is bored. A compression spring 7 is inserted into the horizontal hole 6, one end of which touches the protrusion 31, and the other end of the compression spring 8 is screwed into one end of the horizontal hole.
The presser foot 3 is urged to rotate clockwise in FIG. 2.

As described above, the presser foot device of this embodiment has a compression spring inserted into the support member, and one end of which is pressed against the projection of the presser foot to urge the presser foot to tilt downward. Since the spring is built into the device, the spring does not obstruct work or visibility, and the device has a clean and attractive appearance.

Furthermore, since the other end of the spring is fixed with a screw screwed into the support member, the spring can be inserted and removed by attaching and detaching the screw. Not only can assembly and spring replacement be performed easily, but the screw itself moves forward and backward by rotating the screw, thereby making it possible to adjust the strength of the spring.

In the example above, the compression spring is inserted into the support member,
The protruding end is placed against the protruding piece of the presser foot, and the compression spring is inserted into the protruding piece of the presser foot, or placed vertically at the rear of the presser foot, and a screw is attached to the side of the presser foot to tighten the spring. The same effect as in the above embodiment can be obtained even if the projecting end portion of the support member is configured to abut against the support member.

[Brief explanation of the drawing]

FIG. 1 is a front view of a conventional cloth presser device, and FIG. 2 is a partially cutaway front view of a cloth presser device according to the present invention. 1... Support member, 3... Presser bar, 3... Presser foot, 5... Groove, 6... Horizontal hole, 7... Compression spring, 8
……screw.

Claims (1)

[Scope of utility model registration request] Support member 1 detachably attached to presser bar 2
and a presser foot 3 rotatably pivoted to the member;
A communication hole 6 formed in either the support member or the presser foot, a compression spring 7 inserted into the communication hole and whose end protruding from the communication hole is applied to the support member or the presser foot, and a compression spring 7 formed at the other end of the communication hole. The sewing machine is equipped with a cloth cutting device that is screwed in and fastens the compression spring, and the screw 8 moves forward and backward in the communication hole by rotating the screw 8 to adjust the strength of the compression spring 7. The presser foot device used.