KR870001529B1 - Driving device of sewing machine - Google Patents

Abstract

The machine is equipped with speed detector, needle position detector, speed control mechanism which detects the speed of the drive motor, and a needle position control mechanism. The rotor of the motor is fixed to the upper shaft of the machine, and the stator to the inside of the frame inner periphery. The machine is equipped with the lubricating 0:1 supply mechanism that a part of L.O. flows to the drive motor.

Description

Sewing machine drive

1 and 2 are perspective views showing an example of the configuration of a general sewing machine and a sewing machine drive device.

3 is a cross-sectional view showing the structure of the sewing machine head portion of the present invention.

* Explanation of symbols for main parts of the drawings

11: stator 12: rotor

13 detector 14 detector rotating unit

15: lubricant

The present invention relates to a sewing machine drive device, in particular a sewing machine drive device that performs a shift operation including a drive stop of a sewing machine and a stop of a sewing machine needle.

The attachment state of the sewing machine drive apparatus in an industrial sewing machine generally has the structure shown in FIG. 1 and FIG. 1, (1) is a sewing machine head, (2) A detector for detecting the speed and the needle position of the sewing machine, (3) is a drive motor, (4) a control unit for controlling the drive motor (3) or the solenoid of the sewing machine, etc. by receiving signals from the detector (2) and the pedal, (5 ) Denotes a sewing machine table, and 6 denotes a sewing machine pedal.

The driving motor 3 generally uses an electromagnetic clutch and a brake mechanism. The sewing machine shifts in accordance with the amount of stepping of the pedal 6, and the sewing machine returns to the neutral position when the pedal 6 is returned to the neutral position. Is decelerated and is configured to stop at a predetermined needle position. The driving motor to which the control unit 4 is attached is fixed to the sewing machine table 5 with a bowl, and the rotational force is transmitted to the sewing machine head via the pulley and the belt. Recent sewing operations are made of various kinds, small quantities, and short cycles, and accordingly, the sewing process must be changed frequently, that is, changing the discharge of the sewing machine. The sewing machine is dedicated to each sewing process, and the sewing machine chute is also required in the same manner. For this reason, when changing this process, it is common to remove the sewing machine head 1, the drive electric motor 3, and the control part 4, and to attach to another sewing machine, and to change arrangement | positioning, without moving the sewing machine table 5. to be. However, the sewing machine head and the electric motor to remove and attach them are heavy each 30kg, and work is required because they are attached to the poor workability.

In order to improve this problem, the thing of the structure shown in FIG. 2 is proposed and it is put to practical use in part. In FIG. 2, reference numeral 3 denotes a drive motor, reference numeral 4 denotes a control unit, and a detector is incorporated in the drive motor 3, and the sewing machine head 1, the sewing machine table 5, and the pedal 6 Same as 1 degree. In this configuration, since the drive motor 3 is fixed to the sewing machine head 1, it is not necessary to remove the drive motor 3 when changing the sewing machine arrangement, and obviously, the following improvements have been made. It has a drawback. Since the attachment position of the drive motor 3 is close to the face of the sewing worker, there is a drawback that the cooling wind of the drive motor 3 is likely to contact the worker, thereby causing discomfort to the worker. In addition, in order to reduce vibration of the sewing machine table 5, the sewing machine head 1 is attached to the sewing machine table 5 via a cushioning material such as rubber. By this, the sewing machine head 1 is poor in balance, and in order to prevent it from tilting, the hardness of the above-mentioned shock absorbing material must be raised, and the vibration of the sewing machine table becomes large.

In addition, since the sewing machine head and the drive electric motor are each composed of independent types, the two structures described above are not expensive, and are expensive as a whole.

The present invention reduces the cost by eliminating the above-mentioned drawbacks, simplifying the removal of the sewing machine and the drive device from the sewing machine table, and sharing a part of the mechanism of the sewing machine and the driving motor without causing discomfort to the operator. It is for the purpose of planning.

The sewing machine driving apparatus of the present invention is to provide a novel sewing machine driving apparatus which fixes the rotor of the drive motor to the upper shaft of the sewing machine, and fixes the stator to the inner circumference of the frame of the sewing machine to solve all the conventional drawbacks. .

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

3 is a structural cross-sectional view of the sewing machine head portion.

In FIG. 3, 7 is an upper end shaft, and is connected to the lower end shaft (not shown) via the belt 8. As shown in FIG. 9 is a frame, and the stator 11 of the drive electric motor 10 is fixed to the inner peripheral part, and the rotor 12 which consists of permanent magnets is fixed to the upper shaft 7. The driving motor 10 of this embodiment is a brushless direct current electric motor, and the shifting operation and the stop of the needle can be performed by coupling with a control unit (not shown) attached to the head of the sewing machine. Denoted at 13 is a detector of a speed, a needle position, and a rotor position composed of an optical encoder, and the rotating portion 14 is fixed to the upper end shaft 7. The purpose of detecting the rotor position is to switch the energization of each of the poles of the stator 11 by the position of the rotor 12. 15 is a lubricating oil, 16 is a supply pipe, and the lubricating oil 15 pumped from the oil pan (not shown) installed in the lower part of the sewing machine is supplied to the bearing 17 which is generally made of a small alloy. However, in the present embodiment, the stator 11 is first supplied to cool the stator 11, and then supplied to the bearing 17 through the oil feed string 18.

As apparent from the above description, the present invention combines the driving motor into the sewing machine frame, thereby simplifying the detachment of the sewing machine head and the sewing machine drive from the sewing machine table, and cooling the driving motor, which has been used as a lubricating oil of the conventional sewing machine. It is useful for the purpose of eliminating the cooling wind from contacting the worker, maintaining the balance by coupling the driving motor to the center of the sewing machine head, and maintaining the shaft, frame, and bearing originally required for the driving motor. It is possible to supply a very good sewing machine drive by enabling a significant price reduction by using a common.

Claims (2)

It is equipped with a speed detector of the sewing machine connected to the upper side of the sewing machine, a needle position detector of the sewing machine, a speed control mechanism for controlling the speed of the sewing machine driving motor, and a position control mechanism for controlling the needle position of the sewing machine. The sewing machine driving device is fixed to the upper shaft of the, and the stator of the electric motor is fixed to the inner peripheral portion of the frame of the sewing machine. The sewing machine driving apparatus according to claim 1, wherein a part of the sewing machine lubricant oil has a supply mechanism for lubricating oil flowing in the sewing machine driving motor part.

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