JPS6055155B2 - Sewing machine dust collector - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is used in sewing machines, particularly industrial sewing machines, to automatically remove fabric scraps, empty ring threads, dust, dirt, etc. that are generated during sewing operations such as edge stitch sewing machines (overlock sewing machines, interlock sewing machines), etc. This invention relates to a dust collector for sewing machines that collects dust.

Conventionally, this type of dust collector has usually consisted of a blower and a dust collection box. The box is made separately, and the power source for the blower is integrated with the clutch motor so that rotational force is transmitted from the idle shaft end of the motor rotor, which is constantly rotating in the clutch motor. .

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 the clutch motor, and is originally used 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 sewing machine and to integrate it with the clutch motor, a speed increasing transmission device is required between the idle side shaft end of the motor and the impeller of the blower, and the structure is extremely complicated. There were drawbacks such as: 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
%), since the blower is always being operated, there is a drawback that the blower always generates unpleasant high noise. The present invention was made in order to eliminate the drawbacks of the conventional device as described above, and it is integrated into the clutch motor that drives the sewing machine, and is compact, convenient to handle, produces less noise, has higher performance, and is less expensive. The purpose is to provide a dust collector for sewing machines.

The present invention will be explained below based on a detailed explanation. 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 an overlock sewing machine body, 2 is a sewing machine table, 3 is a sewing machine pulley, 4 is a motor pulley, 5 is a transmission belt, and 6 is a foot pedal, which are the same as those conventionally known.

8 is a clutch motor with a dust collector, which is the essence of the present invention, and the main part is the clutch motor part 9 that drives the sewing machine.
, a blower motor section 10 that collects dust, and a dust collection box section 11
It is made up of.

The clutch motor part 9 has the same motor stator 1 as 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 to the rotor at any time, and a clutch shaft 17 transmitting data to the sewing machine via the pulley 4 and belt 5. , a movable bearing 18 supporting this so as to be movable in the axial direction is connected to the foot pedal 6 by a connecting rod 19, and the clutch wheel 16, clutch shaft 17, and movable bearing 18 are movable in the axial direction to connect the clutch at any time. , a clutch lever 20 that disengages 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 disengaged, a frame 22 that accommodates and supports these, a bracket 23, an intermediate bracket 24,
Composed of base 25 etc. has been completed. The tip of the clutch lever 20 is closed (ON) when the foot pedal 6 is depressed to engage the clutch and the sewing machine is in operation, and when the foot pedal 6 is in the neutral position, the clutch is disconnected and the sewing machine is stopped. A limit switch 26 is installed as a switch means that opens (OFF) at certain times. The blower motor section 10 is composed of a casing 30, an impeller 31, a blower motor 32 for rotating the blower motor at high speed, and the like. (end). The dust collection box section 11 includes a dust collection box 40 and a dust filter 4.
1. It is composed of a cloth dust collection hose 42, an empty thread dust collection hose 43, etc., and is integrally attached to the left end of the case 33 of the blower motor section 10. 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 a power supply 46 via a power push button switch 45, and the blower The motor 32 is connected to a power source 46 via the limit switch 26. In the above configuration, when the power switch 45 is first turned on, only the clutch motor 9 is energized, and the motor rotor 13 in conjunction with the hand wheel 15 operates without load, and both the sewing machine 1 and the propeller motor 32 are stopped. ing.

When the operator steps on the foot pedal 6, the clutch lever 20 is rotated downward, the clutch wheel 16 is connected to the hand wheel 15, and the sewing machine 1 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 impeller 31 generates a large amount of air and a high wind pressure, and the wind flows as indicated by arrow A in FIGS. 1 and 2. Cloth waste, empty thread, cotton dust, etc. generated by the operation of the sewing machine 1 pass through the dust collection hoses 42 and 43 along with the wind A, are sucked into the dust collection box 40, are blocked by the dust filter 41, and are collected. The dust accumulates in the dust box 40. The air A that has passed through the dust filter 41 and has become clean passes through the blower casing 30, passes through the clutch motor ventilation passage formed for cooling the clutch motor 9, and passes through the pulley shaft end (the right end in the figure). ) is discharged. Then, when the predetermined sewing is completed and the operator returns the foot pedal 6 to its original position, the clutch is disengaged and the sewing machine 1 stops. At the same time, the limit switch 26 opens (O
FF), the power to the blower motor 32 is cut off, and the blower also stops. 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, the blower motor section 10 and the dust collection box section 11 are integrated into the clutch motor 9, making it easy to install the sewing machine table set and change the layout.

In addition, in this integration, the blower motor part 1
0 and the clutch motor section 9 are independent and unrelated, so there is no need for a power transmission connection to operate the blower using the power of the clutch motor, unlike in the conventional device described above. It can be integrated into a structure. Furthermore, since the blower motor part and the dust collection box part are directly integrated, there is no need for a duct for the hose that connects the ventilation path of the blower and dust collection box as in conventional equipment, which not only reduces the cost but also increases the efficiency of air blowing. It is possible to measure the improvement in Furthermore, according to the embodiment of the present invention, the air A generated by the blower for dust collection is also used as it is for cooling the clutch motor 9, so a more rational design can be achieved in terms of the characteristics and cost of the motor. It becomes possible.

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 workers' feet, causing discomfort. According to the embodiment, the air is exhausted from the bracket 23 of the clutch motor 9 and the ventilation exhaust window 23a, which are provided on the pulley shaft end side where the worker is not located, in order to avoid hitting the worker's feet. Problems can also 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 dust collecting box or the dust collecting box and the blower motor part are separated and connected to each other by a ventilation duct or a hose.

As described in detail above, according to the present invention, the blower motor section 10 is operated by the limit switch 26 only when the sewing machine 1 is actually operated when the operator depresses 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 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.

Furthermore, according to the present invention, the power transmission systems of the blower motor section and the clutch motor section are independent and unrelated, so unlike conventional devices, the power of the clutch motor is used to operate the blower. There is no need for a power transmission connection, which has the advantage of simplifying the structure.

[Brief explanation of the drawing]

Fig. 1 is a schematic diagram showing the overall configuration of a sewing machine equipped with a dust collector according to the present invention, Fig. 2 is a sectional view showing the detailed structure of the dust collector/clutch motor, and Fig. 3 is a 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, 10
11 indicates a blower motor section, and 11 indicates a dust collection/box section.

Claims (1)

[Claims] 1. A clutch motor that drives the sewing machine by clutch operation, and a clutch motor that is integrated with the clutch motor,
A blower motor that blows air to the clutch motor and sucks cloth waste, thread waste, cotton dust, etc.; a switch means that supplies electricity to rotate the blower motor when the clutch is operated; and a switch means that rotates the blower motor by supplying power when the clutch is operated; 1. A dust collection device for a sewing machine, comprising a dust collection box for storing a dust collector, etc., and the blower motor is rotated only when the sewing machine is being driven.