JPS6340116B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is a dust collecting device for a sewing machine, particularly for collecting fabric waste, thread waste, cotton dust, etc. generated during sewing operation of an hemline stitch sewing machine (overlock sewing machine, interlock sewing machine), etc. in an industrial sewing machine. This invention relates to a dust collector for a sewing machine that automatically collects dust.

In conventional sewing machines equipped with a dust collector, the dust collector is generally operated not only when the sewing machine is running, but also at other times, which consumes unnecessary power and reduces the sewing work time. is 80～
This had the disadvantage of deteriorating the work environment by being exposed to the blower noise of the dust collector, which generates as high as 100 phons of noise.

The present invention has been made in view of the above-mentioned conventional problems, and its purpose is to control the operation and stop of the blower motor in conjunction with the clutch operation of the clutch motor, and to operate it independently of the clutch operation. It is an object of the present invention to provide a dust collecting device for a sewing machine that can perform a dust collecting function by driving a blower motor when desired.

In order to achieve the above object, the present invention provides a clutch motor that drives a sewing machine, a foot pedal that operates the clutch of the clutch motor, a blower motor that sucks dust such as cloth waste, thread waste, cotton dust, etc. The control device includes a dust collection box for storing the dust, and a control device for controlling operation and stop of the blower motor in conjunction with clutch operation of the clutch motor by stepping the foot pedal, and the control device includes the above-mentioned The present invention is characterized in that a control device means is provided which enables the operation of only the blower motor by the kicking motion of the foot pedal independently of the clutch operation.

Hereinafter, preferred embodiments of the present invention will be described based on the drawings.

FIG. 1 is a schematic diagram showing the overall configuration of a table set for an overlock sewing machine equipped with a dust collector according to the present invention. The motor pulley, 15 is a transmission belt, and 16 is a foot pedal, which have the same structure as conventional well-known ones.

18 is a clutch motor with a dust collector,
A clutch motor section 20 that drives the sewing machine, a blower motor section 22 that collects dust, and a dust collection box section 24
It is composed of. Clutch motor part 20
are motor stator 26, motor rotor 28,
A motor shaft 30, a hand wheel 32 that is fixed to the motor shaft 30 and rotates as a unit, a clutch wheel 34 that is connected to the motor shaft at any time, and a clutch that transmits the rotational force of the clutch wheel 34 to the sewing machine via the pulley 14b and the transmission belt 15. A shaft 36, a movable bearing 38 that supports the shaft so as to be movable in the axial direction, and the foot pedal 1.
A clutch lever 4 is connected to the clutch lever 4 by a connecting rod 40 and slides the clutch wheel 34, clutch shaft 36, and movable bearing in the axial direction to connect and disconnect the clutch at any time.
2. It is comprised of a brake shoe 44 that comes into frictional contact with the clutch wheel 34 to suddenly stop the sewing machine when the clutch is disconnected, a frame 46 for housing and supporting these, a bracket 48, an intermediate bracket 50, a base 52, etc. The clutch lever 42 is constructed by connecting two lever members 42a and 42b. In this state, a limit switch 80 is installed that is closed (turned on) when the foot pedal 16 is depressed to connect the clutch and the sewing machine is in operation, and is opened (on) when the foot pedal 16 is in the neutral position. A limit switch 81 is attached that closes (turns on) when the ball is turned off and the ball is turned off from this state. Incidentally, when the foot pedal 16 is pressed again, the clutch remains in the disconnected state.

Further, as shown in FIG. 2, the blower motor section 22 is composed of a casing 56, an impeller 58, a blower motor 60 that rotates the impeller at high speed, etc. These are housed in a case 62, and the clutch motor section 20 is It is integrally attached to the opposite end of the load (the left end in FIG. 2).

Furthermore, the dust collection box section 24 is composed of a dust collection box 64, a dustproof filter 66, a dust collection hose 68 that serves as a dust passage for cloth waste, empty ring thread, etc., and is provided at the left end of the case 62 of the blower motor section 22. It is integrally attached to the section.

The clutch motor section 20 and the blower motor section 22 are driven and controlled by a control circuit shown in FIG. That is, the clutch motor unit 20 that drives the sewing machine and the blower motor 60 that drives the blower are connected to the power push button switch 7.
0, and is connected in parallel to the power supply 72 via the clutch motor section 20 and the blower motor 60.
A limit switch 80 is interposed between the power switch 80 and the blower motor 60, and a limit switch 81 is interposed between the power switch 80 and the blower motor 60.

Next, the operation will be explained. First, assuming that the foot pedal 16 is in the neutral position, when the power switch 70 is turned on, power is supplied from the power source 72 only to the clutch motor section 20, and the motor rotor 28 is operated with no load together with the hand wheel 32. However, since the clutch is in the disconnected state at this time, the sewing machine main body 10 and the blower motor 60 are in a stopped state.

When the operator depresses the foot pedal from this state, the lever members 42a, 4 of the clutch lever 42
2b is rotated downward, the clutch wheel 34 is brought into pressure contact with the hand wheel 32, and the sewing machine main body 10 is driven.At the same time, the limit switch 80 attached to the lever member 42a is closed. Power is supplied from the power source 72, and the impeller 58 rotates at high speed. This impeller 5
8, a suction airflow is generated within the dust collecting hose 68 as shown by arrow A. For this reason, dust such as cloth waste, empty thread, cotton dust, etc. generated by the operation of the sewing machine main body 10 is sucked into the dust collection box 64 through the dust collection hose 68 along with the suction airflow, and is blocked by the dust filter 66. The dust collects in the dust collection box 64.
Further, the airflow that has passed through the dustproof filter 66 and been purified is transmitted to the casing 5 of the blower motor section 22.
6, through the ventilation passage of the clutch motor section 20, and is discharged to the pulley shaft end side (the right end in the figure).

Thereafter, when the predetermined sewing work is completed and the operator releases the foot pedal 16 to return it to the neutral position, the clutch is shut off and the sewing machine body 10 stops, and at the same time, the limit switch 80 is opened. The blower motor 60 stops because its power is cut off.

Further, when cleaning the area around the sewing machine or operating only the blower at a desired time, by flipping the foot pedal 16, only the lever member 42b of the clutch lever 42 is actuated, the limit switch 81 is closed, and the blower Electric power is supplied to the motor 60, the impeller 58 is rotated at high speed, a suction airflow is generated, and a dust collection function is exhibited.

From this state, when the foot pedal 16 is released to return to the neutral position, the limit switch 81 is opened, the power to the blower motor 60 is cut off, and the blower is stopped.

As described above, according to the present invention, it is possible to drive the blower motor in response to the clutch operation of the clutch motor, and also to drive it independently. The blower motor is driven to perform the dust collection function, and when the sewing machine is stopped, the blower motor also stops, and only the blower motor can be driven when necessary, such as during cleaning. The dust collection function can be performed simply by operating the foot pedal, and it has excellent effects such as being able to perform the dust collection function for a variety of purposes.

[Brief explanation of the drawing]

FIG. 1 is a schematic configuration diagram showing the overall configuration of a sewing machine equipped with a dust collector according to the present invention, and FIG. 2 is an enlarged sectional view showing the clutch motor section with the dust collector.
FIG. 3 is a circuit diagram showing the control circuit. The same parts in each figure are given the same reference numerals, 10 is the sewing machine body, 16 is the foot pedal, 20 is the clutch motor part, 22 is the blower motor part, 24 is the dust collection box part, 42 is the clutch lever, 80, 81 is a limit switch.

Claims (1)

[Claims] 1. A clutch motor that drives the sewing machine, a foot pedal that operates the clutch motor, a blower motor that sucks dust such as fabric waste, thread waste, and cotton dust, and a dust collection box that stores the dust. It includes a single casing that integrally houses the clutch motor and the blower motor, and a control device that controls operation and stop of the blower motor in conjunction with clutch operation of the clutch motor by depression of the foot pedal. The dust collector for a sewing machine is characterized in that the control device is provided with a control means that enables only the blower motor to be operated by a kicking operation of a foot pedal independently of the clutch operation. Device.