JPS6024297Y2 - Sewing machine male presser foot device - Google Patents

Description

[Detailed description of the invention] This invention is applied to sewing one of the male and female front fronts that are sewn to the seam of canvas at the waist of pants, skirts, etc. This invention relates to a male presser foot device for a sewing machine.

Conventionally, in this type of male presser foot device, a holding part is formed downward at the lower end of the presser foot, and the engaging part 6 of the male ring shown in FIGS. 3 and 5 is pushed into this holding part from below. It was configured to be worn.

However, in general, it is not preferable to lower the presser foot of a sewing machine from a high position because the impact is large and causes the fabric to shift, and due to mechanical constraints, it is not possible to raise the presser foot too high.

Therefore, even if the presser foot is raised, the free movement of the fingertip holding the male penis is obstructed by the bed surface, making it difficult to attach the male penis to the holding part.

The purpose of this invention is to eliminate the above-mentioned conventional drawbacks with a simple configuration.

Examples of this invention will be described below with reference to the drawings.

FIG. 1 is a perspective view of a sewing machine sewing section, in which the main body of the sewing machine 1 moves the fabric horizontally with respect to a needle 2 that moves up and down at a fixed position to form stitches in a predetermined pattern. The model is based on the known cycle stitch sewing machine described in Japanese Patent Publication No. 51-10153, and is equipped with a known thread cutting device that cuts the upper thread and lower thread below the bed surface 1a, and a control circuit to be described later. ing.

That is, although not shown, this sewing machine 1 includes a clutch mechanism that acts to transmit and cut off the power of the drive motor to the main shaft of the sewing machine, a solenoid that acts on the clutch mechanism, a thread trimming device, a presser foot lifting mechanism, and a mechanism for horizontally holding the fabric. A feeding mechanism having a feeding cam interlocked with a main shaft for movement.

The presser foot lifting mechanism is configured to be movably locked in an active or inactive position, for example, in conjunction with depression or release of a corresponding presser foot lifting pedal.

The other relationship is that when the starting pedal is depressed, the solenoid is energized, the clutch mechanism is connected and the sewing machine 1 is started, and after the clutch mechanism is disengaged after a predetermined number of stitches have been formed, the thread is cut by the inertial rotation of the main shaft. The thread cutting device is operated via the cam, and after one sewing operation is completed, the control circuit automatically repeats the above operation a necessary number of times to complete the sewing cycle.

As shown in FIGS. 3 and 5, the male hook 3 has - holes 4a through which the sewing machine needle 2 can pass vertically, spaced apart from each other at three positions corresponding to the apexes of a specific triangle on the horizontal plane;
A sewing part 5 having 4b and 4c and a specific three-barrel hole 4a so as to be able to engage with the female ring.

4b is bent from one side of the sewn part 5 toward the other hole 4c, and gradually extends away from the upper surface of the sewn part 5, and the holes 4a, 4b, and others of the three specific holes of the sewn part are bent. Hole 4. An engaging portion 6 having a width and length that does not obstruct the movement path of the sewing machine needle 2 to the sewing machine needle 2 is provided.

Reference numeral 7 in the figure denotes a transfer body having a support plate 8 fixed to one end thereof, which moves parallel to the bed top surface 1a in conjunction with the feed cam of the cloth speed mechanism.

Reference numeral 9 denotes a movable body supported vertically and movably on the free end of a presser arm 10 whose base end is fixed to the transfer body 7. Interlocks with the lifting mechanism.

Reference numeral 11 denotes an L-shaped support fixed to the movable body 9, and a groove 12 is formed on the left side of the horizontal portion 11a toward the jaw portion of the sewing machine 1.

13 is a presser foot whose base end is rotatably supported by a step screw 14 perpendicular to the lower surface of the horizontal portion 11a of the support body 11.

The presser foot 13 has a vertical cross-sectional shape that matches the space between the sewing part 5 and the engaging part 6 of the male ring 3 so that the male ring 3 can be loosely fitted therein. A holding part 13a having a width and length that does not obstruct the movement path of the sewing machine needle 2 to the hole 4a farther from the movable body 9 and the other hole 4c among the holes 4a and 4b of the cylinder, and the hole 4b of the male ring 3. A needle hole 13b is formed to penetrate vertically corresponding to the side sewing part, and a regulating part 13c engages with one side of the retaining part 6 so as to regulate the position of the male ring 3 loosely fitted in the holding part 13a. Equipped with.

Reference numeral 15 denotes an elastic locking spring whose one end is fixed to the upper surface of the presser foot 13, and the free end 15a is formed into a U-shape so that it can be held in the groove 12.

A stopper 16 is provided on the lower surface of the support 11 and prevents the presser foot 13 from rotating clockwise in the figures when the locking spring 15 is engaged with the groove 12 as shown in FIGS. 1 and 3.

Reference numeral 17 denotes a linear elastic body whose one end is fixed to the upper surface of the presser foot 13, and whose free end is formed into a W-shape, and whose apex and slope allow the male ring 3 loosely fitted into the holding part 13a to be held in the holding part. 13a and the regulating portion 13c.

Note that 18 indicates holes 4a and 4 formed in the sewn part 5 of the male ring 3.
Corresponding to b and 4c, the receiver is a needle hole formed vertically through the plate 4, and 19 operates to pull out the thread end on the needle side, cut by the thread cutting mechanism after the stitch is formed, above the cloth. This is a known wiper.

This invention has the above-described structure, and as shown in FIGS. 1 and 3, the free end 15a of the locking spring 15 is always engaged with the groove 12, and the position of the presser foot 13 with respect to the support 11 is fixed. ing.

When the presser foot 13 is pressed counterclockwise from this state, the locking spring 15 and the groove 12 are disengaged, and the presser foot 13 rotates approximately 90 degrees counterclockwise around the step screw 14. Second,
4, the distance from the holder 13a to the edge of the bed 1a becomes extremely short in the direction in which the male ring 3 is attached to the holder 13a.

Therefore, in the state shown in FIGS. 2 and 4, while holding the male ring 3 horizontally, the space between the sewing part 5 and the engaging part 6 is held by the holding part 1.
3a, by simply pressing and moving horizontally against the elastic body 19 until the side surface of the engaging part 6 hits the regulating part 13c.
It is securely held by the holding portion 13a.

Next, rotate the presser foot 13 clockwise and set it again as shown in Fig. 1.3, and the holes 4a and 4bt 4 of the male ring 3 will be closed.
The receiver faces the needle hole 18 of the plate 8 (through the hole 4b and the needle hole 13b of the presser foot 13).

Then, when the receiver places the cloth on the plate 8 and lowers the movable body 9 to the operating position, the cloth is sandwiched between the receiver and the plate 8 via the male ring 3 on the lower surface of the presser foot 13. .

When the sewing machine is started from this state, the fabric and the male ring move horizontally with respect to the needle 2 which moves up and down, changing their position for each stitch, and repeating the sewing operation and thread cutting for a predetermined number of stitches three times. Then, stop and sew the male ring 3 to the cloth W as shown in FIG.

As described above, this invention consists of a movable body 9 which is supported by the machine frame so that it can be moved vertically and locked to receive the downward elastic force, and a movable body 9 which is fixed to the movable body at its base end and extends horizontally and has a free end. In order to allow the male ring to fit loosely, the vertical cross-sectional shape matches the space between the sewn part and the engaging part of the male ring, and one of the three specific holes of the male ring that is loosely fitted is farthest from the movable body. The holding part 13a has a width and length that does not obstruct the movement path of the sewing machine needle to the one hole 4a and the other hole 4C, and the hole 4b that is closer to the moving body among the three specific holes of the male can. A needle hole 13b that penetrates vertically corresponding to the moving path of the sewing machine needle, and a surface that can be secured to one side in the width direction of the engaging part so as to restrict the position of the male ring loosely fitted in the holding part. The presser foot 13 is made up of a regulating portion 13c having a holder, and the base end is fixed to the base of the presser foot so that the male ring loosely fitted in the holding portion of the presser foot is held between the holding portion and the free end is fixed to the base of the presser foot. The elastic body 17 has an elastic force to press toward one side of the holding part corresponding to the bent part of the male ring, and the male ring is held in a specific direction, and it is held facing the holding part of the presser foot. Since the male hook can be held in the holding portion of the presser foot simply by moving horizontally against the elastic body, the male hook can be easily and reliably attached to the sewing machine.

[Brief explanation of drawings]

Figure 1 is a perspective view of the sewing machine suturing section, Figure 2 is a perspective view similar to Figure 1 with the presser foot rotated to the position where the male lock is attached, and Figures 3 and 4 correspond to Figures 1 and 2. FIG. 5 is a perspective view of the main part of the cylindrical ring sewn onto cloth. 3... male ring, 5... sewn part, 6...
...Engaging portion, 9...Moving body, 13...
... Presser foot, 13a... Holding part, 13b...
...Needle hole, 13c...Regulation part, 17...
...Elastic body.

Claims (1)

[Claims for Utility Model Registration] Holes 4a and 4b through which sewing machine needles can pass upward and downward at three positions on a plane, which are the vertices of a specific triangle;
4c and the other hole 4 from one side of the sewing part that connects the holes 4a and 4b of the three specific cylinders so as to be able to engage with the female hook.
It has a width and length that extends gradually away from the upper surface of the sewn part when bent toward c, and that does not obstruct the movement path of the sewing machine needle to the specific three-tube holes of the sewn part and other holes. In a sewing machine in which a male hook 3 consisting of a retaining portion 6 and a retaining portion 6 are held integrally with the cloth and the sewn portion of the male hook is sewn onto the cloth by moving these and a needle relative to each other in the horizontal direction, The movable body 9 is supported by the machine frame so as to be movable up and down to receive the downward elastic force, and the base end is fixed to the movable body and extends horizontally, and the free end is
The hole that is farthest from the movable body among the three specific holes of the male can, which has a vertical cross-sectional shape that matches the space between the sewn part and the engaging part of the male can, so that the male can can be loosely fitted. 4a and other holes 4
The holding part 13a has a width and length that does not obstruct the movement path of the sewing machine needle to c, and corresponds to the movement path of the sewing machine needle to the hole 4b, which is the one closer to the movable body among the three specific holes of the male can. It consists of a needle hole 13b that penetrates vertically and a regulating part 13c that has a surface that can be held on one side in the width direction of the engaging part so as to regulate the position of the male ring loosely fitted in the holding part. Presser foot 1
3, the base end is fixed to the base of the presser foot so that the male ring loosely fitted in the holding part of the presser foot is held between the holding part and the free end is fixed to the holding part corresponding to the bent part of the male ring. A male presser foot device for a sewing machine, comprising an elastic body 17 having an elastic force to press the part toward one side.