JPS6062Y2 - Fabric guide for overlock sewing machine - Google Patents

Description

[Detailed description of the invention] This invention relates to the cloth guide of an overlock sewing machine, and in particular, the cloth guide, which is provided in front of the seam part and guides the edge of the cloth, is placed in one position and the other position in the direction perpendicular to the cloth feeding direction. It is installed so that it can be moved and adjusted, and when the cloth guide is fixed in one position, the cloth guide surface is in a position to form a hem stitch on the cloth edge without cutting the cloth edge with a scalpel, and the cloth guide is fixed in the other position. Sometimes, the fabric guide surface feeds the folded edge of the fabric folded in half along the guide surface, and when the folded part of the fabric is opened after the fabric has been stitched, the stitches are drawn inward from the edge of the fabric. This invention relates to a cloth guide for an overlock sewing machine that is arranged in a position where decorative stitches can be formed.

An embodiment of this invention will be explained below with reference to the drawings. Reference numeral 1 denotes a throat plate which is fixed to the sewing machine frame (not shown) and has a needle drop hole 2 and an open end on one side thereof which is released in the cloth feeding direction. Form a gripping claw 3.

Reference numeral 4 denotes a knife holder of a well-known overlock sewing machine, which is attached to the machine frame so as to be movable and adjustable in the horizontal direction perpendicular to the cloth feeding direction, and a fixed knife 5 is fixed to one side in front of the seaming part. Fix with piece 6 and screw 7.

8 is a well-known movable knife that moves up and down in conjunction with the main shaft,
It is brought into pressure contact with the side surface of the fixed knife 5 by elastic force, and its vertical movement cooperates with the fixed knife 5 to cut the edge of the fabric.

Reference numeral 9 denotes a support body, a part of which is bent downward to form a mounting hole 10 that opens in the cloth feeding direction, and is detachably supported on the end face of the scalpel holder 4 through the hole 10 with a screw 11. At the same time, the support part 12 is attached to the cloth cover 1 in front of the seam part.
3. Form along the top and front surfaces.

Reference numeral 14 denotes a cloth guide, whose flat part 15 is placed on the flat part of the support 9, and the - side is bent into an inverted U-shape to stand upright along the cloth feeding direction line. A long hole 18 in the horizontal direction perpendicular to the cloth feeding direction is formed in the attachment part 17 which forms the surface 16 and is bent downward along the front surface of the support body 9 . 12 Screw 1 screwed into the front
The fabric guide 14 is fixed to the support 9 via the support 9 .

Reference numerals 20 and 21 are marked lines as positioning means provided on the upper surface of the support portion 12 of the support body, and are provided facing the side edges of the cloth guide 14 and spaced apart from each other in the horizontal direction perpendicular to the cloth feeding direction.

When the cloth guide 14 is fixed in one position by aligning the side edge of the cloth guide 14 with this marked line 20, the cloth guide surface 16 passes through the blade of the fixed knife 5 in the cloth feeding direction as shown in FIG. When the side edge of the cloth guide 14 is aligned with the parallel line A or slightly to the left and the side edge of the cloth guide 14 is fixed in the other position, the cloth guide surface 16 is fixed parallel to the cloth feeding direction. It is configured to be located on a line C approximately halfway between a line A passing through the blade portion of the scalpel 5 and a line B passing through the needle drop hole 2 parallel to the cloth feeding direction.

This invention has the above structure, and its operation will be explained next.

First, as shown in FIG. 2, the cloth guide 14 is fixed at one position with its side edge aligned with the marked line 20 and the cloth guide surface 16 is aligned with line A, and the cloth is guided along the cloth guide surface 16. When the cloth is sewn while being sewn, the edge of the cloth passes through the blade of the fixed scalpel 5, avoiding contact with the blade of the fixed scalpel 5, and the edge of the cloth is guided to the sutured portion without coming into contact with the blade of the fixed scalpel 5, and the edge of the cloth is not cut by the scalpel. An overlock seam is formed.

Furthermore, when the knife holder 4 is moved in the horizontal direction perpendicular to the cloth feeding direction with respect to the machine frame with the cloth guide 14 in one position, the support 9 supporting the cloth guide 14 also moves together with the knife holder 4. Therefore, there is no need to separately adjust the position of the cloth guide surface 16 with respect to the blade portion of the fixed scalpel 5.

Furthermore, loosen the screw 19 and move the cloth guide, align its side edge with the marked line 21, align the cloth guide surface 16 with line C, set the cloth guide 14 in the other position, tighten the screw 19, and fix the cloth guide with the needle thread. Apply needle thread tension suitable for the fabric to be sewn, and use decorative thread for the looper thread to reduce the tension.

From this state, fold the cloth 22 in half as shown in Figure 4A,
When the folded edge 23 is sewn while being guided along the fabric guide surface 16 in the other position, a loop of the looper thread is formed with the loop protruding from the folded edge 23 of the fabric 22 by the overlock claw 3 like a mouth. , When the cloth 22 is opened around the folded edge 23 folded in half as shown in C after the sewing is completed,
On the front side of the fabric, the looper thread as a decorative thread runs in a zigzag pattern alternately to the left and right needle threads around the folded edge, and on the back side of the fabric, the needle threads run perpendicular to the folded edge and parallel to each other. Stitches with decorative threads are formed on the surface of the cloth 22 inward from the edges of the cloth 22.

In the illustrated embodiment, the two scored lines provided on the support portion 12 of the support body 9 and the side edges of the cloth guide 14 form positioning means for the cloth guide 14; and another fixing member such as the cloth cover 13, or two marking lines or marks are provided on the cloth guide 14 so as to match them with indicators provided on the support 9 or the fixing member, and It is also possible to use the left and right ends of the elongated hole 18 provided in the cloth guide 14 as stoppers, and use the left or right end as a mechanical positioning means to abut the screw 19.

Conventionally, when decorative stitching was performed on the inside of the fabric edge as shown at the opening in Figure 4, there was no positioning means for the other position of the fabric guide, so it was necessary to repeat test casting multiple times to determine the appropriate position. However, preparations required a lot of time and were rarely done in ordinary households.

As described above, with this invention, by setting the cloth guide 14 in one position, oversewing can be performed without cutting the edges of the cloth. In addition to the effect of being able to overlock the folded fabric without folding it in half, by setting the fabric guide to the other position, the fabric can be opened centering on the folded edge after overcasting the folded edge of the folded fabric. Since a decorative seam can be formed on the surface of the cloth inward from the edge of the cloth using the looper thread, effects such as expanding the handicraft uses of the sewn product can be obtained.

[Brief explanation of the drawing]

Figure 1 is a perspective view of the front side of the suture section of the overlock sewing machine.
Fig. 2 is a plan view of Fig. 1, Fig. 3 is an enlarged sectional view of parts ■ to ■ in Fig. 2, and Fig. 4 is an explanatory diagram for explaining the sewing order obtained using the present invention. be. In the figure, 1 is a needle plate with a needle drop hole 2 and a hooking claw 3, 4 is a knife holder supporting a fixed knife, 8 is a movable knife, 9 is a support, 14 is a cloth guide, and 20 and 21 are positioning means. It is a score line as an example.

Claims (1)

[Claims for Utility Model Registration] A needle with a needle thread that moves up and down in conjunction with the main shaft, a needle hole, and a thread hook with an open end located on one side of the needle hole and released in the cloth feeding direction. A throat plate fixed to the machine frame, a looper that is linked to the main shaft and has a looper thread that works with the needle to form an overlock stitch on the edge of the fabric, and a horizontal line that is perpendicular to the fabric feeding direction with respect to the machine frame. A knife halter 4 that supports a fixed scalpel 5 on one side in front of the seam is attached so as to be adjustable in the direction of movement, and a movable knife 8 that moves up and down in conjunction with the main shaft and cuts the edge of the fabric in collaboration with the fixed knife. A sewing machine comprising: a support 9 whose base is removably supported on a scalpel holder and has a support 12 formed outside the machine frame; A cloth guide 14 is attached to be movable and adjustable between one position and the other position and forms an upright cloth guide surface along the cloth feed direction line from the sewing machine seam part, and a cloth for positioning one position and the other position of the cloth guide. A positioning means is provided between the guide and the machine frame, and when the cloth guide is fixed in one position with respect to the support by the positioning means, the cloth guide surface passes through the blade of the fixed knife and is on a line parallel to the cloth feeding direction. and the cloth guide surface is formed parallel to the cloth feeding direction and located approximately midway between a line passing through the fixed knife and a line passing through the needle drop hole when fixed at the other position. Baroque sewing machine cloth guide.