JPH0534638Y2 - - Google Patents

Description

[Detailed description of the invention] Purpose of the invention This invention relates to a front cover device for an overlock sewing machine.

Overlock sewing machine is No. 50-19660,
As known from Utility Model Publication No. 55-12772, Utility Model Number 60-28389, etc., a front cover is pivotally supported at the lower front of the sewing machine body. When in use, this front cover covers the looper drive section and the sewing section during sewing, and also guides the fabric cut by the scalpel toward the front of the sewing machine. When doing work, it opens toward the front so that it does not interfere with the work.

However, since the support shaft of these front covers is located downward and away from the sewing area, it is difficult to finely adjust the cover mounting position when sewing conditions change, and the front cover is There is a problem in that the cost is high when replacing the cover, and furthermore, when the cover is previously divided, there is a problem in that vibration, rattling, and noise are generated between the divided parts.

Therefore, the first purpose of this invention is to obtain a front cover that can be easily finely adjusted;
The purpose of the present invention is to provide a front cover that can be used for many types of stitches at low cost, and a third purpose is to provide a front cover that can prevent vibration, rattling, and noise even when the sewing machine rotates at high speed.

Structure of the Device The device according to claim 1 of this application is an overcoat that is rotatably supported around a horizontal axis disposed at the lower front of the sewing machine body, and has a front cover that covers the looper drive section and the sewing section. In a lock sewing machine, the front cover is divided into a front cover body with a cutout near the upper sewing part and an auxiliary cover that covers the vicinity of the sewing part, and the auxiliary cover is fixed to the front cover main body so that the front and rear positions can be adjusted. The invention according to the second claim is such that the notch of the front cover main body is rectangular, and the lower end of the auxiliary cover is fixed to the lower end of the notch so as to be adjustable in the front and rear positions, and the side part of the auxiliary cover is fixed to the lower end of the notch of the front cover body so that the front cover can be adjusted. It extends so as to overlap with the front side of the main body, and a screw is made to protrude from the front cover main body at the overlapping upper part to the front side, and the tip of the screw is engaged and supported from the back side of the auxiliary cover. The invention according to claim 3 is characterized in that the engagement support is in a press-contact state.

Effect: According to the configuration according to the first claim, the auxiliary cover is fixed to the front cover main body so that its position can be adjusted back and forth, and its attachment position is close to the sewing part and the knife.
It is possible to make minute front-to-back position adjustments in the narrow space between the sewing part and the knife. In addition, if you need a front cover with a shape that matches the type of seam, you can prepare only the auxiliary cover with a different shape, and there is no need to replace the entire front cover, reducing costs and installation time. can be reduced.

Further, according to the configuration according to the second aspect, since the auxiliary cover is supported at three locations, it is possible to prevent vibrations from occurring. Further, according to the configuration according to the third aspect, the engagement operation is easy, the protrusion does not protrude toward the front of the sewing machine, and vibration can be reliably prevented.

Embodiment An embodiment of this invention will be described with reference to FIGS. 1 and 2. That is, FIG. 1 shows an overview of an overlock sewing machine. A front cover 2 is supported by a horizontal shaft (not shown) at the lower front of the sewing machine body 1. When the handle 3 is pushed to the right and pulled toward the front, The front cover 2 moves to the right along with the horizontal axis, and its upper part falls forward to be in an open state, so that a looper driving part and an oversewing part are exposed. A sewing machine needle 4 and a cloth guide 5 are provided on the upper left side of the front cover 2, and overlock stitches are performed using a lower knife 7 provided on the lower bed 6, an upper and lower looper (not shown), a feed dog, an upper knife, etc. be exposed. The front cover 2 of this overlock sewing machine is composed of a front cover main body 8, which is an inverted L-shaped plate with a notch in the upper left corner, and an auxiliary cover 10, which is formed into a rectangular shape so as to fill the notch 9. A screw hole 12 is provided in the lower end 11 of the notch 9, and a long hole (not shown) is provided in the bent portion 13 by bending the lower side of the auxiliary cover 10 inward. An auxiliary cover 10 is attached to 8. Note that when the front cover 2 is in the closed state as shown in FIG.
The installation position can be adjusted. The end of the auxiliary cover 10 opposite to the sewing machine needle 4 extends so as to overlap the front side of the front cover main body 8 to form a vertical convex strip 15, so that the end of the auxiliary cover 10 is At the top of the cover main body 8, a screw 16 is protruded toward the front side by an appropriate amount, and the tip 17 of the screw 16 is
is brought into pressure contact with the back surface of the convex strip 15, and a set screw 18 is used to prevent the screw 16 from turning.

In this way, in this embodiment, only the auxiliary cover 10 can be replaced depending on the sewing conditions, and
It is possible to adjust the mounting position forward and backward, and since the mounting is done near the sewing part and the knife, fine adjustment is easy. In addition, the auxiliary cover 10 is pressed against the back surface of the protruding strip 15 at the upper part of the screw 16. Tip 17
Since it is supported by the auxiliary cover 10, the elastic force of the auxiliary cover 10 acts to enhance the effect of preventing vibration and rattling caused by high-speed rotation. Further, since the screw 16 does not protrude in front of the protrusion 15, it is safe, and the protrusion 15 can also be used as a handle.

Effects of the invention As described above, the invention of this application can cope with various sewing conditions at low cost, and also allows adjustment of the mounting position.
Particularly, it has the advantage that fine adjustment can be easily made, and furthermore, vibration and noise accompanying high-speed rotation can be prevented.

[Brief explanation of the drawing]

FIG. 1 is a front view of an overlock sewing machine to which this invention is applied, and FIG. 2 is a sectional view of its main parts. 8...Front cover main body, 10...Auxiliary cover, 1
4...screw, 15...projection, 16...screw, 1
7...Tip.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) In an overlock sewing machine having a front cover rotatably supported around a horizontal axis located at the lower front of the sewing machine body and covering the looper drive section and the sewing section. The front cover is divided into a front cover main body with a notch near the upper sewn part and an auxiliary cover that covers the near sewn part, and an overlock that fixes the auxiliary cover to the front cover main body so that its position can be adjusted back and forth. Front cover device for sewing machine. (2) The cutout part of the front cover main body in claim 1 is square, and the lower end of the auxiliary cover is fixed to the lower end of the cutout part so as to be adjustable in the front and back position,
Form the side part of the auxiliary cover to extend so as to overlap the front side of the front cover body, make a screw protrude toward the front side from the front cover body at the top of the overlapping part, and use the tip of the screw to form an extension of the auxiliary cover. A front cover device that is engaged with and supported from the back of the unit. (3) A front cover device as claimed in claim 1, in which the fixing is performed at two positions at the bottom of the auxiliary cover, and a projection is provided at the top of the front cover main body, and the projection supports the back surface of the auxiliary cover under pressure.