JPS6032475B2 - Sewing machine dust collector - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is a sewing machine, particularly an industrial sewing machine, that automatically removes fabric shoulders, empty loop threads, dust, dirt, etc. that occur during sewing operations of hem stitch machines (overlock sewing machines, interlock sewing machines), etc. The present invention relates to a dust collector for sewing machines that collects dust.

Conventionally, this type of dust collection device usually consists of a blower and a dust collection box, and some use a separate motor blower completely unrelated to the cool latch motor that drives the sewing machine, and The box is kept in a separate layer, and the power source for the blower is integrated with the clutch motor so that rotational force is transmitted from the idle side shaft end of the motor rotor of the clutch motor, which is constantly rotating.

However, the former takes up extra space as a dust collector,
Another drawback is that it is very inconvenient to change the layout, and the latter generally has an impeller with a larger outer diameter than a clutch motor, and was originally used in sewing machines as a power source for blowers that need to operate at higher rotational speeds. In order to utilize the power of the clutch motor that drives the motor and to integrate it with the clutch motor, a speed increasing transmission device is required between the shaft end on the free side of the motor and the impeller of the blower, and the structure is extremely complicated. There were drawbacks. Furthermore, in common with both, the actual operation of the sewing machine that actually requires dust collection (normally, the rate at which the clutch motor is engaged and the sewing machine is driven is 20 to 30
%), the disadvantage is that the blower is constantly being operated, which causes unpleasant high noise from the blower. The present invention was made in order to eliminate the drawbacks of the conventional devices as mentioned above, and it is integrated into the clutch motor that drives the sewing machine to create a sewing machine that is compact, convenient to handle, produces less noise, and has higher performance and is cheaper. The purpose is to provide a dust collection device. The details of the present invention will be explained below 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, and Fig. FIG. 3 is a detailed structural sectional view of the clutch motor with a dust device, and FIG. 3 is a power supply connection diagram thereof.

In the figure, 1 is the overlock sewing machine body, 2 is the sewing machine table, 3 is the sewing machine pulley, and 5 is the motor pulley.
The transmission belt 6 is a foot pedal, and these are the same as those conventionally known.

Reference numeral 8 denotes a clutch motor with a dust collector, which is the essence of the present invention, and is largely comprised of a clutch motor section 9 for driving the sewing machine, a blower motor section 10 for collecting dust, and a dust collection box section 11. There is.

The clutch motor part 9 has a motor stator 1 similar to the conventional one.
2. A motor rotor 13, a motor shaft 14, a hand wheel 15 fixed to the motor shaft 14 and rotating integrally therewith, a clutch wheel 16 connected and connected at any time, and a clutch transmitted to the sewing machine via the pulley 4 and belt 5. A shaft 17, a movable bearing 18 that supports the shaft so as to be movable in the axial direction, are connected to the foot pedestal 6 by a connecting rod 19, and the clutch shaft 17 and the movable bearing 18 are movable in the axial direction at any time. A clutch lever 20 that connects and disconnects the clutch, a brake shoe 21 that comes into frictional contact with the clutch wheel 16 to suddenly stop the sewing machine when the clutch is disconnected, a frame 22 that accommodates and supports these, a bracket 23, an intermediate bracket 24,
It is composed of a base 25 and the like. At the tip of the clutch lever 20, a foot lever 6 is depressed to connect the clutch and close (ON) when the sewing machine is in operation, and when the foot lever 6 is in the neutral position, the clutch is disengaged and the sewing machine stops. Limit switch 2 that turns off the switch in the state
6 is installed. The blower motor unit 10 is composed of a casing 38, a blower motor 32 for rotating an impeller 31 at high speed, and the like. It is integrally attached to the left side end).

The dust collection box section 11 is composed of a dust collection box 40, a dust filter 41, a dust collection hose 42, a hollow thread dust collection hose base 3, etc., and is integrated into the left end of the case 33 of the blower motor section IQ. installed. As shown in FIG. 3, the power supply connection is such that the clutch motor 9 that drives the sewing machine and the blower motor 32 that drives the blower are connected in parallel to the power supply 46 via the power button switch turtle 5. ,
Further, the blower motor 32 is connected to a power source 46 via an IJ mitt switch 26. In the above configuration, when the power switch 45 is turned on, only the clutch motor 9 is energized, and the mole rotor 13 is operated with no load together with the handwheel 15, and both the sewing machine stove and the propeller motor 32 are stopped. ing.

In this invention, the sewing machine is operated only when the sewing machine is operated. War motor 32 operates. That is, when the operator steps on the foot lever 6, the clutch lever 20 is rotated downward, the clutch wheel 6 is connected to the handwheel 5, and the sewing machine is operated. At the same time, the limit switch 26 is closed (ON), so the blower motor 32 is energized and the impeller 31 is rotated at high speed. The rotation of the three impellers generates a large amount of air and a high wind pressure, and the wind flows as indicated by arrow A in FIGS. 2 and 3.
Cloth waste generated by the operation of the sewing machine 1, such as empty threads and cotton dust, passes through the screen dust hoses 42 and 43 together with this wind A.
The dust is sucked into the dust collection box 40', blocked by the dust filter 41, and collected in the dust collection box 0. The clean air A that has passed through the dustproof filter 41 passes through the blower casing 30 and passes through the ventilation passage of the clutch motor 9, which is formed for cooling the clutch motor 9, to the pulley shaft end side (Fig. When the specified sewing is finished and the worker returns the foot pedal 6 to its original position, the clutch is disengaged and the sewing machine stops.At the same time, the limit switch 2
6 is opened (OFF), the power to the blower motor 32 is cut off, and the blower is also stopped. Since the embodiment of the present invention is configured as described above, the following effects can be obtained.

That is, according to the embodiment of the present invention, since the blower motor section 10 and the dust collection box section 11 are integrated with the clutch motor 9', it becomes easy to hem the sewing machine table set and change the layout.

In addition, in this integration, since the power transmission systems of the blower motor part Q and the clutch motor part 9 are independent and unrelated, the blower can be operated using the power of the clutch motor like the conventional device described above. There is no need for a power transmission connection for this purpose, and it can be integrated with a simple structure. Furthermore, since the blower motor part and the dust collection box part are directly integrated, there is no need for hoses or ducts that connect the blower and dust collection box ventilator as in conventional equipment, which not only reduces the cost but also improves the air blowing efficiency. You can measure your improvement. Further, according to the embodiment of the present invention, the blower motor part 1 limit switch 26 operates only when the sewing machine 1 is running properly when the operator steps on the foot pedal, that is, when dust collection is necessary. Since everything else is stopped, not only can power consumption be reduced compared to conventional equipment that is constantly running, but the operation of the blower, which normally generates a high noise of 80 to 100 horns (A characteristic), can be kept to the minimum necessary. This can greatly contribute to improving the working environment.

According to the present invention, "the wind A generated by the blower for dust collection is also used as it is for cooling the clutch motor 9, so it is possible to design the motor more rationally in terms of characteristics and cost. .

Furthermore, in the case of conventional devices, depending on the arrangement of the device (particularly the exhaust hose or exhaust port), the exhaust air from the blower could hit the feet of the worker, causing discomfort, but with the present invention, The above-mentioned problem is also inevitable because the exhaust air is discharged from the bracket 23 of the clutch motor 9 and the ventilation exhaust window 23a, which are provided on the end of the pulley shaft where the worker is not located, in order to avoid hitting the worker's feet. It can be resolved. In the embodiment described above, the dust collection box section and the blower motor section are all integrally attached to the clutch motor. Of course, the same effect can be obtained even if the part and the dust box or the dust collection box and the blower motor part are separated and connected to each other by a ventilation duct or hose.

[Brief explanation of the drawing]

Figure 1 is a schematic diagram showing the overall structure of a sewing machine equipped with a dust collector according to the present invention, Figure 2 is a sectional view showing the detailed structure of the clutch motor with the dust collector, and Figure 3 is its power supply connection. It is a diagram. In the figure, 1 is the sewing machine body, 2 is the sewing machine table, 8 is the clutch motor with dust collector, 9 is the clutch motor part, 1
0' shows the blower motor part, 11' shows the dust collection box part. Figure 2 Figure 3

Claims (1)

[Claims] 1 A clutch motor that drives the sewing machine, a blower motor that sucks up fabric waste, thread waste, cotton dust, etc., and a dust collection box that stores the above-mentioned fabric waste, thread waste, cotton dust, etc. Each of the blower motors is an independent power transmission system, and the operation of the blower motor is controlled only when the sewing machine is driven, and the exhaust air after dust collection from the blower of the blower motor is caused to flow into the ventilation cooling air path of the clutch motor. A dust collector for sewing machines featuring: