JPS6032468B2 - Automatic presser foot lifting device for industrial sewing machines - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to the structure of an automatic presser foot lifting device for an industrial sewing machine, and provides an automatic presser foot lifting device that can be easily attached to an industrial sewing machine.

Most of the presser foot lifting devices using the presser foot technology are of the type in which a hog lifter connected to the presser foot is manually pushed by a pig. Additionally, sewing workers have to operate the presser foot thousands of times a day.
Operating the presser foot is extremely tiring work. Conventionally, in order to automate this operation, automatic presser foot lifting devices using a solenoid or an air cylinder have been put into practical use.

However, since a DC power source is required to drive the solenoid, and air piping and a compressor are required to drive the air cylinder, it cannot be easily installed on conventional knee-lift industrial sewing machines. The reality is that it has not yet become widespread. The present invention relates to a structure for easily attaching an automatic presser foot lifting device using an electric motor to an industrial sewing machine in order to solve the above problems, and will be described in detail below with reference to the drawings.

Fig. 1 shows a conventional example of a presser foot lifting device, in which 1 is the main body of an industrial sewing machine, 2 is a needle, 3 is a presser foot, 4 is a presser foot adjustment screw for adjusting the pressure of the presser foot 3, and 5 is a sewing machine tip. , 6 is an oil receiver, 7 is a knee raiser for driving the presser foot, 8 is a position adjustment rod for the hog raiser, 9 is a holding fitting for the position adjustment rod 8, and 1 is a knee raiser rotating shaft.

In the above configuration, the presser foot 3 is configured to perform BI
If you press from to B2, you will move from A wing to A2. Since the presser foot 3 is held down by a presser foot adjustment spring (not shown) whose strength can be adjusted using a presser foot adjustment screw 4, a considerable force is required to press the knee raiser 10. In addition, L is the distance from the bottom surface of the sewing machine table 5 to the center of the knee lift rotation shaft 10, 8
This is the rotation angle of the knee-raiser rotating shaft 10 necessary to move the presser foot 3 from the lowered position AI to the uppermost layer A2. FIG. 2 shows an embodiment of an automatic presser foot lifting device using an electric motor.

Reference numeral 11 indicates a follower equipped with the knee-lifting rotating shaft 101 for driving the presser foot, 12 a cam associated with the follower 11, 13 an output shaft of a reducer equipped with the cam 12, and 14 a reducer and a control device. Built-in automatic presser foot main body, 15 is an electric motor that drives the reducer, I6' is a piglet switch which is an input device that gives an operating signal to the control device, 17 is a position adjustment rod for a knee guard switch 86, and a tortoise shoe automatic This is a mounting bracket for the presser foot lifting device.

Even in this configuration, the presser foot 3 automatically moves from A to A2 when the knee rest switch 16 is lightly pressed with a wisteria, and automatically returns to AI when the pig is removed from the knee rest switch. Figure 3 shows an embodiment of the present invention.The knee-raiser rotating shaft for driving the gungawa maze, the juka is the knee-raiser rotating shaft tatami 8' and the attached follower. The bolt that fixes the rotating shaft at any angle also has two rollers that engage with the follower.
The support shaft that supports the 2M makoro 2 fins is the cam body equipped with the Kijima support shaft air force.The military 3 is the output shaft of the reducer equipped with the cam body g eagle. This is the bolt that fixes the Marimo Hinako.In addition, the plane of motion of the subordinate army and the plane of motion of the two cam bodies are structured so that they do not intersect.Hereafter, the work will be done according to Figures 6 and 7 of the 1st Tsuru Army Reko. explain.

The turtle diagram shows the case where the presser foot shown in the traditional dance diagram is at the lowered position A. Next, when lifting the presser foot 3 from the A wing to A2, the cam body 22 rotates counterclockwise in all directions, and the K Q2 drives the secondary muscle bone in the direction of the arrow as shown in the ``Knee Raise''. The rotating shaft turtle fin rotates and raises the presser foot. When it reaches the position shown in the first dot diagram, the cam body base 2 stops. At this position, the presser foot 3 reaches the top layer A Yoshinobu shown in the second diagram. Next, when lowering the presser foot 8 from arm A to the utility line, the cam body 22 rotates counterclockwise and the single follower moves by itself in the direction of the arrow as shown in Figure 7. When the cam body returns to the position shown in the figure, it stops at the second base.The follower turtle 1 stops when it reaches the position A where the presser foot 3 has been lowered.This process is repeated thereafter. Distance L from the underside of the sewing machine table horse to the center of the knee-lifting rotation axis IQ and the rotation angle of the knee-lifting rotation axis IQ required to move the presser foot 8 from the lowered position A to the top layer A2 81 Each industrial sewing machine is different.

However, ``if the coupling structure according to the present invention is used, the eighth
As is clear from FIGS. 8 and 9, if the positions of the follower bar 11 and the cam body 22 are fixed to the positions shown in FIGS. 8 and 9 when the presser foot 3 is at the highest position A2, L and Even if 8 is different from LI to L2 and 81 to 82, the automatic presser foot lifting device can operate without any adverse effect. According to the present invention, the automatic presser foot lifting device using an electric motor can be attached to an industrial sewing machine by removing the holding fitting 9 from the pig lifting rotating shaft 0 of the conventional pig lifting device and following the pig lifting rotating shaft. All you have to do is attach the automatic presser foot lifting device to the sewing machine table, align the position of the slave electric turtle and the engaging cam, and fix the automatic presser foot lifting device to the sewing machine table.It is very easy to do.

This is a major feature of the present invention. Furthermore, even if 1 and 8 are slightly different as described above, the automatic presser foot lifting device can be attached to an industrial sewing machine without any adverse effect on the operation of the automatic presser foot lifting device. This is a major feature of

Due to these features, the present invention can provide an automatic presser foot lifting device using an electric motor that automates the presser foot operation of an industrial sewing machine as a device that can easily automate the presser foot operation of an industrial sewing machine.

It should be noted that the structure shown below is just one embodiment, and it goes without saying that the embodiments of the present invention are not limited to this structure.

A detailed explanation without drawings: Figure 1 is a front view of an industrial sewing machine equipped with a conventional presser foot lifting device, and Figure 2 is a front view of an industrial sewing machine equipped with an automatic presser foot lifting device using an electric motor. 5 is a perspective view of the main parts of the automatic presser foot lifting device according to the embodiment of the present invention.
FIGS. 8 and 9 are explanatory diagrams of the operation of the embodiment of the present invention shown in FIG. 3.

Tomi cod...knee-raising rotation axis " ] Takashi... followers are also 12...
Cam, blade 3...output shaft, blade 5...electric motor, 16...input device (button switch), 19...volt
- Roller, 21..., spindle, 22...cam body.

Figure 1 Figure 2 Figure 3 Figure 4 Figure 5 Figure 6 Figure 7 Figure 8 Figure 9

Claims (1)

[Claims] 1 A follower attached to a knee-raiser rotating shaft for driving a presser foot connected to a presser foot to which downward force is constantly applied, a cam that engages with the follower, and an output shaft equipped with the cam. an automatic industrial sewing machine comprising: a reducer having a reducer; an electric motor that drives the reducer; a control device that drives the cam to an arbitrary position on a circumference and stops it; and an input device that provides an operation signal to the control device. The presser foot lifting device has a structure in which the follower can be fixed at any angle on the knee-lifting rotating shaft for driving the presser foot, and the cam is provided with a roller that engages with the follower, a support shaft that supports the roller, and a support shaft that supports the roller. An automatic presser foot lifting device for an industrial sewing machine, comprising a cam body mounted with a support shaft and moving on a plane that does not intersect with the plane of movement of the follower.