JPS6024296Y2 - Sewing machine female presser foot device - Google Patents

Description

[Detailed description of the invention] This invention is applied to sew one of the male and female pairs of bulges to be sewn to the seam of canvas at the waist of pants and skirts. This invention relates to a female presser foot device for a sewing machine.

Conventionally, in this type of female presser foot, a holding part is formed downward at the lower end of the presser foot, and the raised part 10a of the female ring 10 shown in FIGS. 2 and 4 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 it causes a large impact and causes the fabric to shift, and furthermore, due to mechanical constraints, it is not possible to lower the presser foot from a high position.

Therefore, even if the presser foot is raised, the bed surface obstructs the free movement of the fingertip holding the female button, making it difficult to attach the female button to the holding part.

The purpose of this invention is to form the retaining portion of the female can in an upward direction to solve the above-mentioned conventional drawbacks.

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, this sewing machine 1 includes a clutch mechanism (not shown in the figure) 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 cloth A feeding mechanism having a feeding cam interlocked with a main shaft for horizontally moving the.

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 start pedal is depressed, the solenoid is energized, the clutch mechanism is connected and the sewing machine 1 is started, and after a predetermined number of stitches have been formed, the clutch mechanism is disengaged and the main shaft inertia rotates to cut the thread. 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.

In the figure, numeral 3 denotes a transfer body to which a plate 4 is fixed at one end, and is moved parallel to the bed top surface 1a in conjunction with the feed cam of the cloth speeding mechanism.

Reference numeral 5 denotes a movable body supported vertically and movably on the free end of a presser arm 6 whose base end is fixed to the transfer body 3. Interlocks with the lifting mechanism.

Reference numeral 8 denotes a main presser foot whose base end is fixed to the movable body 5 via a support 9, and has a free end disposed parallel to the bed top surface 1a that corresponds to the raised part 10a of the female ring 10, and has a chamfer 8b at the tip. A protrusion 8a is formed to protrude downward.

Reference numeral 11 denotes an auxiliary presser foot disposed directly below the main presser foot 8, whose base end is rotatably supported by a shaft 12 in the middle of the main presser foot 8, and a female presser foot 10 is provided on the upper surface of the free end facing the protrusion 8a. As shown in FIGS. 2 and 3, a downwardly recessed groove 11a is formed so that the raised portion 10a can be placed thereon so that its right side surface is higher than its left side surface.

Reference numeral 13 denotes a coil spring which is normally compressed between the spring supports 8b and llb of the presser feet 8 and 11 so as to lightly press the auxiliary presser foot 11 against the main presser foot 8.

In addition, 14 is a needle hole formed vertically through the plate 4 corresponding to the holes 10c, 10c formed in the sewing parts 10b, 10b of the female hook 10, and 15 is a needle hole formed by a thread cutting mechanism after the stitches are formed. This is a known wiper that operates to pull out the cut yarn end on the needle side above the fabric.

This invention has the above-mentioned structure, and as shown in FIG. The receiver is lightly pressed against the protrusion 8a, and the lower surface of the sub presser foot 11 is strongly pressed against the upper surface of the plate 4 by the elastic force of the presser foot lifting mechanism acting on the movable body 6.

When the presser foot lifting pedal is depressed from this state, the movable body 6 rises, so both presser feet 8 and 11 rise while maintaining the above state, and the lower surface of the sub presser foot 11 is separated from the upper surface of the plate 4, and this This allows the receiver to place the cloth W on the upper surface of the plate 4, and also allows the sub presser foot 11 to rotate relative to the main presser foot 8 against the coil spring 13.

Then, while holding the female ring 10 between the fingertips like a two-point chain in FIG.
When placed on the upper surface and moved in the direction of the arrow while pressing lightly downward, the sub presser foot 11 rotates clockwise against the coil spring 13 relative to the main presser foot 8, so the female presser 10 is moved in the direction of the arrow. The presser foot 11 slides into the groove 11a of the groove 11a.
and the protrusion 8a.

Next, the receiver places the cloth W on the plate 4, and when the pedal is released and the movable body 5 is lowered, the secondary presser foot 11 and the receiver are placed between the cloth W and the plate 4 due to the strong elastic force of the presser foot lifting mechanism. W is held, and the female hook 10 is also held between the presser feet 8 and 11 by the same elastic force.

When the sewing machine 1 is started from this state, the needle 2 moves up and down.
The cloth W and the female hook 10 reciprocate together while changing their positions little by little each time a stitch is formed, repeat the sewing action for a specific number of stitches and the thread cutting action twice, and then stop, as shown in FIG. Sew the female hook 10 to the cloth W as shown below.

As described above, this invention consists of a movable body 5 that is supported by the machine frame so that it can be moved vertically and locked to receive the downward elastic force, and a free end that is fixed to the movable body and extends horizontally. A main presser foot 8 having a protrusion 8a formed to protrude downward, and a main presser foot 8 which is arranged horizontally facing and spaced apart from the lower surface of the main presser foot, and whose base end is rotatably supported by the main presser foot and attached to the protrusion of the main presser foot. an auxiliary presser foot 11 having a downwardly recessed groove 11a formed on the upper surface of the opposing free end so that the protrusion of the female feeder can be placed thereon;
Then, by lowering the movable body until the lower surface of the sub-presser foot comes into contact with the cloth in parallel, the female presser placed in the concave groove of the sub-presser foot is held between it and the protrusion of the main presser foot. Since it is related to the sewing machine, there is an effect that the female hook can be easily and reliably attached to the sewing machine.

In this embodiment, the concave groove 11a of the sub-presser foot 11 is lightly pressed against the protrusion 8a of the main presser foot 8, but
As shown in FIG. 5, the two may be always separated from each other.

That is, according to the other embodiment shown in FIG. 5, the coil spring 13 is arranged on the right side of the shaft 12, and the sub presser foot 11 always moves clockwise until it hits the screw shaft 16 supported on the main presser foot. When the main presser foot 8 is lowered after placing the female presser foot 10 in the recess R11a, the lower edge of the free end of the sub-presser foot 11 comes into contact with the cloth on the plate 4, and then the main presser foot As the presser foot 8 descends, the sub-presser foot 11 rotates counterclockwise against the coil spring 13, and eventually the sub-presser foot 1 rotates on the presser foot due to the elastic force of the mechanism.
The cloth W is held between the presser foot 1 and the plate 4, and the female hook 10 is held between the presser feet 8 and 11 due to its elastic force.

[Brief explanation of drawings]

Fig. 1 is a perspective view of the sewing machine sewing part, Fig. 2 is a perspective view of the main part, Fig. 3 is a longitudinal cross-sectional view of the main part, Fig. 4 is a perspective view of the female kettle sewn to the cloth, and Fig. 5 FIG. 3 is a vertical cross-sectional view showing another embodiment. 5...Moving body, 8...Main presser foot, 8a
...Protrusion, 10...Female pin, 11...
...Secondary presser foot, lla...Concave groove, 13...
...Elastic body, 14...Blocking means.

Claims (1)

[Claims for Utility Model Registration] A sewing part 10 having holes 10C910C through which a sewing machine needle can pass vertically at two positions separated on a single plane.
b, a raised part 10a formed by bending away from the cloth between both the sewn parts so that the tip of the hook of the male can enter between 10b and the cloth after both the sewn parts are sewn to the cloth; Female genitalia consisting of 10
In a sewing machine that sews the sewing part of the female kettle to the fabric by holding the sewing machine integrally with the fabric and moving them and the sewing machine needle horizontally, the sewing machine is designed to sew the sewing part of the female kettle to the fabric, which normally receives the downward elastic force. A movable body 5 supported by a frame so as to be movable up and down and locked; a main presser foot 8 having a protrusion 8a whose base end is fixed to the movable body and extends horizontally and whose free end projects downward; It is placed on the sewing machine facing the lower surface of the foot and separated from it, and the proximal end is rotatably supported by the main presser foot, and the raised part of the female presser can be placed on the upper surface of the free end facing the protrusion of the main presser foot. The female presser foot 11 is placed in the concave groove of the sub-presser foot by lowering the movable body until the lower surface of the sub-presser foot is in parallel contact with the fabric. A female presser foot device for a sewing machine that is associated with a main presser foot so as to sandwich and hold the ring between the protrusions of the main presser foot.