JPS6032474B2 - 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 collect and collect fabric shoulders, empty loop threads, dirt, etc. that are generated during sewing operations such as hem stitch sewing machines (overlock sewing machines, interlock sewing machines), etc. This relates to a dust collector for sewing machines.

Conventionally, this type of dust collector usually consists of a blower and a dust collection box, which are separate motors completely unrelated to the clutch motor that drives the sewing machine.

The blower and the dust collection box are separated, and the power source for the blower is connected to the clutch motor by transmitting rotational force from the idle side shaft end of the motor rotor, which is constantly rotating. There is something that is integrated with. However, the former has disadvantages such as requiring extra space as a dust collector and making it extremely inconvenient to change the layout.
The latter generally has an impeller with a larger outer diameter than the clutch motor, and uses the power of the clutch motor that originally drives the sewing machine as a power source for a blower that needs to operate at a higher rotational speed. In order to integrate with the motor, a speed increasing transmission device was required between the shaft end on the idle side of the motor and the impeller of the blower, resulting in a disadvantage that the structure was extremely complicated. 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 to drive the sewing machine is 20 to 30%).
), the blower is always running, regardless of
There was a drawback that the blower constantly generated unpleasant high noise. The present invention was made in order to eliminate the drawbacks of the slave device as described above.It is integrated into the clutch motor that drives the sewing machine, and is compact and easy to handle.
The purpose is to provide a dust collector for sewing machines that produces less noise, has higher performance, and is cheaper. 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. 2 is a table set of the table set according to the present invention. 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, 4 is the motor pulley, and 5 is the sewing machine pulley.
6 is the transmission belt, and 6 is the foot pedal. ``These are the same as the conventional and well-known ones.

Reference numeral 8 denotes a clutch motor with a dust collector, which is the gist of the present invention.The main component is a clutch motor section 9 that drives the sewing machine.
, the blower motor section turtle 0 that collects dust, and the dust collection box section 1
It consists of 1.

The clutch motor part 9 consists of a motor stator i2 similar to the conventional one, a motor rotor 3 to 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 clutch wheel 16 at any time, and the above-mentioned pulley. 4 and a clutch shaft 17 which is transmitted to the sewing machine via a belt 5. A movable bearing 18 supports the clutch shaft 17 so as to be movable in the axial direction.
``A clutch shaft 17, a clutch lever 20 that moves the movable bearing turtle 8 in the axial direction to connect and disconnect the clutch at any time, and 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. Frame 22 for storage and support, placket 23, intermediate bracket 2
4, a base 25, etc. The tip of the clutch lever 28 is closed (ON) when the foot pedal 6 is depressed to connect the clutch and the sewing machine is in operation.
A mitt switch 26 is installed that opens (OFF) when the foot pedal 6 is in a neutral position, the clutch is disconnected, and the sewing machine is in a stopped state. The blower motor consists of a casing 38t impeller 31, a blower motor 32 that rotates it at high speed, and a case 33.
The opposite end of the clutch motor section 9 (
It is integrally attached to the left end of the figure).

The dust collection box section 11 is composed of a dust collection box 0, a dust filter 41, a dust collection hose 42, an empty ring thread dust collection hose 3, etc., and is attached to the left end of the case 33 of the blower motor section Q. The power supply is connected to the power supply 46 in parallel via a power push button switch 45, as shown in Fig. is connected,
Furthermore, the blower motor 32 is connected to the power supply turtle 6 via the IJ mitt switch 26 mentioned above. In the above configuration, when the power switch 45 is turned on, only the clutch motor 9 is energized, and the motor rotor 13 is operated with no load together with the hand wheel 15, and both the sewing machine 1 and the blower motor 32 are at rest. .

When the operator steps on the foot pedal 6, the clutch lever 2Q is rotated downward, the clutch wheel 16 is connected to the hand wheel 15, and the sewing machine is operated. At the same time, the limit switch 26 is opened (ON), so the blower motor 32 is energized and the impeller 31 is rotated at high speed.

The rotation of the three impeller blades generates a large amount of air and a high wind pressure, and the wind flows as shown by arrow A in FIGS. 2 and 3. Cloth dust, empty ring yarn, cotton dust, etc. generated by the operation of the sewing machine pass through the dust collection hose 42 and the turtle 3 together with this wind A, and are sucked into the dust collection box 40', where they are blocked by the dust filter 41. The dust is collected in the dust collection box 40. The clean air A that has passed through the dustproof filter 41 passes through the blower casing 30, and then passes through the ventilation passage of the clutch motor 9, which is formed for cooling the clutch motor, to the end of the pulley shaft ( (right end of the figure). Then, when the prescribed sewing is completed and the worker returns the foot pedal 6 to its original position, the clutch is disconnected and the sewing machine 1 is stopped.At the same time, the limit switch 26 is opened (OFF) and the blower motor 32 The power supply is cut off and the blower is also stopped.Since the present invention is configured as described above, the following effects can be obtained.

That is, ``According to the present invention, since the blower motor section 10 and the dust collection box section li are integrated into the clutch motor 9, it becomes easy to install the sewing machine table set and change the layout.

In addition, in this integration, the blower motor part 1
Since the power transmission systems of 0 and the clutch motor section 9 are independent and continuously connected, there is no need for a power transmission connection to operate the blower using the power of the clutch motor, as in the conventional device described above. Can be integrated with simple horizontal construction,
Furthermore, since the power source is not the same as in the past, there is no risk of a decrease in the dust collection power which is the power load of the sewing machine. 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 ventilation passages of the blower and dust collection box, which are required in the case of attached devices. It is possible to measure the improvement in Further, according to the embodiment of the present invention, the blower motor section 1 limit switch 26 operates only when the sewing machine is actually operated when the operator steps on the foot pedal, that is, when dust collection is necessary, and at other times. Because it is stopped, it not only saves power consumption compared to conventional equipment that is constantly running, but also
The operation of the blower, which generates high zero-horn (A-characteristic) noise, can be kept to the minimum necessary, which can greatly contribute to improving the working environment.

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, which allows for a more rational design in terms of the characteristics and cost of the motor. becomes possible.

Furthermore, in the case of conventional devices, depending on the arrangement of the device (e.g., 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 end side of the pulley shaft where the worker is not located, in order to avoid hitting the worker's feet. Problems can also be resolved.

[Brief explanation of drawings]

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 clutch motor with the dust collector, and Fig. 3 is a power supply connection diagram. It is. 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 is the blower motor part, 11 is the dust collection box part, 31 is the impeller,
32 indicates the motor. Figure 1 Figure 2 Figure 3

Claims (1)

[Claims] 1. Consisting of a clutch motor unit that drives the sewing machine, an impeller and a motor that drives this, a blower motor unit that sucks fabric waste, thread waste, cotton dust, etc. from the sewing machine, and a suction port of this blower motor unit. The clutch motor section and the blower motor section are each an independent power transmission system, and the clutch motor section and the blower motor section are connected to each other. A dust collector for a sewing machine, characterized in that a dust box part is integrally attached to the opposite end of the clutch motor part on the opposite load side.