KR20000020735U - Automatic adjuster to feed metallic yarn of knitting machine - Google Patents

Abstract

PURPOSE: The present invention aims to make the knitting structure evenly without cutting the metal yarn by adding or subtracting the metal thread supply amount in advance according to the tension change of the metal yarn in a loofah knitting machine.

Construction: In the conventional scrubber knitting machine having a weaving part and a yarn supply part and passing a metal thread between a pair of rollers which are in surface contact with each other, the metal thread is supplied to the weaving part. 42 and 43 are rotationally driven by a dedicated DC motor 48, and a load line 58 and a bypass line that are switched by the micro switch 54 between the DC motor 48 and the power source 56. In addition to the 60 connected in parallel, the micro switch 54 is configured to interfere with the tension adjusting bar 44 which is deformed in response to the change in tension of the metal thread A. FIG.

Effect: The present invention is to adjust the rotational speed of the DC motor by the tension control bar to interfere with or release the micro switch to selectively connect the power applied to the DC motor to the load line and the bypass line in accordance with the tension of the metal yarn. .

Description

Automatic adjuster to feed metallic yarn of knitting machine}

The present invention relates to a loofah knitting machine for manufacturing a loofah blended with metal yarn in synthetic yarn, and more particularly, it is possible to prevent the occurrence of single yarn of the metal yarn during knitting by automatically adjusting the amount of yarn feeding according to the tension change of the metal yarn supplied to the knitting machine. The present invention relates to a metal yarn supply automatic control device of a loofah knitting machine.

The scrubber knitting machine was developed using the sock knitting machine as a mother, and the power transmission system, the weaving part, and the yarn supply part have the same configuration, except that the yarn supplied to the weaving part is a synthetic yarn and a metal yarn.

Here, metal yarns are made of thin stainless steel with high strength and pressed to form yarns, which is why they have a big difference from the physical properties of real yarns such as cotton yarn and synthetic yarn. That is, since the metal yarn has almost no elasticity, it is easily cut when it is strongly tensioned. Also, the metal yarn is not continuously supplied in the weaving process, but is temporarily stopped when it is woven by a length corresponding to one scrubber. After weaving only synthetic yarn by length, the process of refeeding is repeated, so that the pattern of yarn feeding is controlled differently from that of synthetic yarn.

For this reason, the loofah knitting machine adopts various types of metal yarn feeders to smoothly achieve the intermittent supply of metal yarns.

As a known type of metal yarn supplying device, a representative type is a metal yarn holding device of a scrubber knitting machine disclosed in Korean Utility Model Publication No. 1055, Publication No. 89-4581, or Korean Utility Model Publication No. 1541, Publication No. 92-539. The metal yarn rolling device of the scrubber knitting machine disclosed in the head is mentioned.

The apparatus has a roller which is in contact with the rotating disk surface and rotated together, and the metal yarn is fed to the weaving portion between the rotating plate and the roller. In this structure, the metal yarn is supplied when the rotary plate and the roller are in contact with each other, and the metal yarn is stopped when the non-contact is in the contact.

In addition, the bobbin wound around the metal yarn has been put into practical use to be passively rotated by the action of the traction force of the metal yarn supplied to the weaving or to be actively rotated by the rotational force of the rotating plate.

However, regardless of how the bobbin rotates, the problem caused by the change in the tension of the metal yarn during weaving has not been solved at all.

The change in tension of the metal thread is the primary cause of the inconsistent supply of metal thread released when the bobbin rotates once, and the accumulation of the deceleration error in the process of being driven by the reduced power from the weaving part. Occurs.

The tension change of the metal yarn described above becomes stress when it appears suddenly, causing the metal yarn to be cut. In the conventionally known scrubber knitting machine, there is no device for detecting the cutting of such metal yarn, but the practical use is to stop the operation of the knitting machine when the cutting of the metal yarn occurs, resulting in lower productivity. It becomes a factor to let you do it.

An object of the present invention is to fundamentally solve all the problems caused by the change in tension of metal yarns in the conventional scrubber knitting machine described above. The present invention provides an automatic control device for supplying metal yarn to a scrubber knitting machine.

In order to achieve the above object, the present invention has a weaving unit and a yarn supply unit in a conventional scrubber knitting machine configured to pass the metal yarn between the pair of rollers which are in contact with each other, the metal yarn is supplied to the weaving unit, The pair of rollers are rotationally driven by a dedicated DC motor, and a bypass line and a load line switched by a micro switch are connected in parallel between the DC motor and the power supply, and the micro switch responds to changes in tension of the metal yarn. The tension adjustment bar which is changed in posture is configured to interfere with the operation.

According to the present invention of the above configuration, the tension adjustment bar is changed to a bent posture due to the change in tension of the metal yarn, and the micro switch is operated to connect the power applied to the DC motor by a bypass line or a load line. The rotation speed of the motor is fully adjusted to change the supply amount according to the tension change of the metal yarn.

1 is a perspective view showing the overall configuration of a scrubber knitting machine to which the present invention is applied.

Figure 2 is a front view showing an example of the operation of the micro-switch to control the speed of the DC motor in response to the tension change of the metal yarn in the present invention.

Figure 3 is a circuit diagram for implementing the speed control of the motor in the present invention device.

* Description of the symbols for the main parts of the drawings *

2: expectation 4: metal yarn supply

6: synthetic yarn supply unit 8: weaving unit

10: power transmission unit 41: tension bar

42: driving roller 43: driven roller

48: DC motor 54: micro switch

56 power supply 58 load line

60: bypass line

When the present invention described above in detail as a preferred embodiment according to the accompanying drawings as follows.

1 is a perspective view showing the overall configuration of a scrubber knitting machine to which the present invention is applied, the knitting machine having a base 2, a metal yarn supply unit 4, a synthetic yarn supply unit 6, a weaving unit 8, and a power unit. Equipped with 10. In general, the base 2 is made of an iron frame, and a metal yarn supply part 4 is positioned at one side of the upper surface thereof, and a synthetic yarn supply part 6 is disposed at the side thereof, and a weave part 8 is disposed at the center thereof, respectively. do.

The metal yarn A wound on the bobbin 40 in the metal yarn supply part 4 is adjusted to maintain a constant tension through the threaded hole of the tension bar 41, and then the driving roller is always in close contact with each other. It passes between the 42 and the driven roller 43, and is supplied to the weaving part 8 via the tip side dead end hole of the tension adjusting bar 44. Here, the tension bar 41 and the tension adjusting bar 44 are installed to be pulled in a predetermined direction by the springs 44 and 46, respectively, to cause posture variation in accordance with the tension change of the metal thread A. Since the tension adjusting bar 44 is longer than the tension bar 41, the tension bar 41 is very sensitive and responds widely.

In addition, since the driving roller 42 rotates by the power of the DC motor 48 transmitted through the V-belt 46, the driven roller 43 is driven in rotation separately from the weaving part 8 and is always in contact. It is driven to rotate and thus the metal yarn (A) is released from the bobbin 40 is supplied to the weaving section (8).

The bobbin 40 is stopped when pressed by the pair of braking levers 50 arranged on the side thereof. These braking levers 50 are pulled and operated by the cable 52 when braking is required, and the cable 52 is a rotating drum (not shown) provided below the base 2 like the conventional scrubber knitting machine. The traction is controlled according to the cam lead.

The micro switch 54 is attached to the lower side of the tension control bar 44, which is increased in tension with the metal thread A as described in detail in FIG. When the attitude is changed from the dashed-dotted line position to the solid line position, it is interrupted to perform switching switching.

In addition, the micro switch 54 is arranged between the DC motor 48 and the power supply 56 (which is obtained by rectifying AC in the present invention) as shown in the circuit diagram of FIG. The load line 58 and the bypass line 60 are connected in parallel on the way to the DC motor 48 so that the rotational speed of the DC motor 48 changes due to the switching operation of the switch 54. It is.

That is, in the circuit configuration of FIG. 3, when the tension of the metal thread A is loose, the tension adjusting bar 44 does not interfere with the micro switch 54, and thus is connected to the contact a, so that the power supply 56 is connected to the load line. It is applied to the voltage dropped uniformly through 58 to rotate the DC motor 48, the rotation speed at this time is set to match the drive speed of the weaving section 8 to the metal yarn (A) during weaving It is good to make sure that the supply of is done without any trouble.

The tension adjusting bar 44 immediately responds when the tension of the metal yarn A drawn into the weaving section 8 suddenly increases during the weaving or in the process of suspending and resuming the supply of the metal yarn A. Since the micro switch 54 is interrupted and switched to the contact b, the power supply 56 is applied to the direct current motor 48 via the bypass line 60, in this case than when passing through the load line 58 Since it is applied at a high voltage value, the rotational speed of the DC motor 48 is increased so that the supply amount of the metal yarn A is automatically increased so that a smooth supply is performed without cutting. In addition, when the tension of the metal yarn A is reduced to a predetermined range, the micro switch 54 is immediately released from the tension adjusting bar 44 and switched back to the contact point a so that the rotation speed of the DC motor 48 is increased. Excessive supply of the metal yarn (A) due to is also prevented in advance, as well as the metal yarn (A) will always maintain a constant tension.

Reference numeral 80 in FIG. 1 is a take-up roller assembly for pulling out the woven loofah fabric, and the weaving part 8 located at the center of the base 2 transmits power of the power unit 10 in a conventional manner. It is to act to be discharged by pulling down a certain amount of the loofah fabric weaving the same as a known sock knitting machine.

As described above, the present invention, while the tension control bar is sensitive to the change in tension of the metal yarn often generated during the weaving process of the loofah fabric, the amount of change in a certain range is adjusted to its own bending state, if a large change is caused immediately the micro switch When the DC motor is rotated to accelerate the rotation of the DC motor, if a large tension is generated in the metal yarn, the supply amount is quickly increased so that stress is not generated, and when the tension of the metal yarn is reduced to a stable range, the DC motor is restarted. Since the speed of the deceleration is to be repeated, the metal yarn has an effect that is always supplied to the weaving unit while maintaining a constant tension, and thus unlike the conventional loofah knitting machines, the device does not stop even under severe tension changes. Helps to improve productivity without cutting metal thread May, ahulreoseo is that the metal's tensile force are supplied to the weaving is always part organization evenly maintained at a constant level according to the quality of the product without defects also has the effect that uniformly improved.

Claims (1)

In a conventional scrubber knitting machine having a weaving part and a yarn supply part and passing a metal thread between a pair of rollers which are in surface contact with each other, the pair of rollers 42 and 43 are provided. Is rotated by a dedicated DC motor 48, and the load line 58 and the bypass line 60 switched by the micro switch 54 are parallel between the DC motor 48 and the power source 56. In addition, the micro switch 54 is automatically adjusted metal thread supply amount of the scrubber knitting machine having a configuration that is interference-operated by the tension adjustment bar 44 is changed in posture in response to the tension change of the metal yarn (A).