JPS5831410B2 - Abnormality detection device for open-end spinning machines - Google Patents

Description

Detailed Description of the Invention The present invention detects abnormal phenomena such as thread breakage during operation in spinning machines such as open-end spinning machines that perform continuous spinning production, and provides a fiber or fiber supply device. This invention relates to an abnormality detection device for an open-end spinning machine that is configured to stop the spinning machine.

Conventionally, regarding abnormality detection devices for spinning machines, for example,
Various circuit configurations have been proposed as shown in Japanese Patent Application Laid-open No. 6-963, Japanese Patent Application Laid-Open No. 47-43527, and Japanese Patent Application Laid-Open No. 49-1828.

In the detection circuit shown in Japanese Patent Application Laid-Open No. 46-963, a normally open switch linked to a thread cutting member, an electromagnet for controlling a fiber bundle supply device, and an indicator lamp are connected in series, and When a thread breakage phenomenon occurs during operation, the thread breakage detection member is activated, the switch is opened, the electromagnet is energized, the feeding operation of the fiber bundle supply device is stopped, and the indicator lamp lights up to indicate that the thread breakage has occurred. It was supposed to notify the public.

Furthermore, in the detection circuit disclosed in Japanese Patent Application Laid-Open No. 47-43527, when a short-circuit accident or the like occurs in the circuit, a heat-sensitive switch or the like operates to open the circuit.

In the detection circuit disclosed in Japanese Patent Application Laid-Open No. 49-1828, a normally closed switch linked to a thread cutting member, an electromagnet for controlling a fiber bundle supply device, and an indicator lamp are connected in series. During the operation of the spinning machine, the electromagnet is always energized to maintain the fiber bundle feeding device in the feeding operation state, and when a thread breakage phenomenon occurs, the switch is opened by the action of the thread breakage member, and the electromagnet is demagnetized. This causes the fiber bundle supply device to stop supplying the fiber bundle, and at the same time, the indicator lamp is turned off to notify the yarn breakage phenomenon.

However, in any of the above-mentioned detection circuits, no measures have been taken in the event that the thread breakage detection member or the switch connected to it fails, so if a thread breakage phenomenon occurs at the time of failure, the electromagnet will not be switched. The fiber bundle supply device continues the fiber supply operation, and the indicator lamp does not notify the yarn breakage phenomenon.

Therefore, even though yarn breakage has occurred, the fiber bundle is supplied into the opening device by the operation of the fiber bundle supply device, and the fibers opened there are conveyed into the condensed Karo-twisting device.

For this reason, there is a risk that fibers may accumulate in a focused heating device such as a rotating spinning chamber, and as the spinning chamber rotates, the fibers will be heated by friction with the fixed part that closes the opening of the spinning chamber, causing a risk of ignition. there were.

In addition, when fibers accumulate in the spinning chamber as described above, a large rotational load is applied to the spinning chamber, causing a flip between the first drive shaft of the spinning chamber and the belt, and the bearing portion of the drive shaft is damaged due to heat generated by the drive shaft. There was also a risk of burnout.

This invention was made in order to eliminate the defects in the conventional detection device as described above, and the purpose is to provide a switch element that is activated based on the yarn breakage detection operation of the yarn breakage detection device, and a switch element that is operated based on the yarn breakage detection operation of the yarn breakage detection device, and A heat-sensitive element disposed nearby and activated by a rise in temperature within the spinning chamber, and an electromagnet for stopping the fiber bundle or wire supply device based on the operation of at least one of the switch element or the heat-sensitive element. By providing this, when a yarn breakage phenomenon occurs during operation of the spinning machine, the electromagnet is switched by the operation of the switch element, and the operation of the fiber bundle supply device can be reliably stopped. If the yarn breakage phenomenon is not detected due to failure of the yarn breakage detection means, switch element, etc. and fibers accumulate in the spinning chamber, the temperature rise in the spinning chamber activates the heat-sensitive element and switches the electromagnet to supply the fiber bundle. An object of the present invention is to provide a new abnormality detection device for an open-end spinning machine that can reliably stop the operation of the device and prevent ignition of fibers in the spinning chamber and burnout in the bearing portion of the spinning chamber drive shaft. .

Hereinafter, the configuration of an abnormality detection device in an open-end spinning machine that embodies the present invention will be explained with reference to the drawings.In the open-end spinning machine shown in FIG. A combing roller 12 is provided so as to be actively rotatable, so that the fiber bundle 13 fed by the feed roller 11 is opened by the combing roller 12 and conveyed from the fiber conveyance path 14 to one side of the spinning unit 10. It has become.

A rotary spinning chamber 17 is rotatably supported on one side of the spinning unit 10 via a cylindrical drive shaft 16 by a bearing 15, and a boot 11 is fixed to the outer end of the drive shaft 16.
18 and a belt (not shown) to rotate at high speed,
The fibers sent from the fiber conveying path 14 are focused and twisted to form a spun yarn 19, and the spun yarn 19 is drawn out through a pull-out channel 21 supported by a fixing part 20 so as to pass through the inside of the two drive shafts 16. It has become.

A pull-out roller 22 and a winding device 23 are provided outside the spinning unit 10, and the spinning unit 10 is provided with a pull-out roller 22 and a winding device 23.
The winding device 2 is pulled out from inside the drawer channel 21 by
3 allows it to be rolled up into a package.

Further, in this embodiment, a yarn breakage detection member 24 for detecting yarn breakage is disposed between the drawing channel 21 and the drawing roller 22 so as to be in contact with the spinning yarn 19,
When a yarn breakage phenomenon occurs during spinning operation, this detection member 2
4 is tilted to detect thread breakage phenomenon.

- a lid 25 closing the opening of the rotating spinning chamber 17;
is provided with a heat-sensitive element 26 for detecting a temperature rise in the vicinity of the rotary spinning chamber 17, and when the temperature in the vicinity of the rotary spinning chamber 17 exceeds a predetermined value, this heat-sensitive element 26 operates to detect an abnormal phenomenon. It is designed to be detected.

In addition, in this embodiment, as the heat-sensitive element 26,
A thermistor with a large positive temperature coefficient made of barium titanate based semiconductor is used, and as shown in Figure 4, this thermistor has a resistance characteristic of about 50g at a temperature around 40°C. , when the temperature rises to nearly 60°C, the resistance value increases exponentially to about IOK, O.

Next, a detection circuit for stopping the fiber feeding operation of the feed roller 11 by the operation of the thread breakage detection member 24 or the thermal element 26 will be described.

First, the detection circuit shown in FIG. 2 is configured so that the fiber bundle supply operation is stopped when the electromagnet SQL for controlling the feed roller 11 is excited. A normally open switch sw1 and a transistor TR linked to the thread breakage detection member 24 are connected in parallel between the power supply line E, and an electromagnet SQL and a transistor for controlling the feed roller 11 are connected to the collectors of the switch SW1 and the transistor TR. Indicator lamps L provided with a voltage drop resistor R1 are connected in parallel.

Further, a resistor R2 and the heat sensitive element 26 are connected in series between the power supply lines E, and a base terminal of a transistor TR is connected to an intermediate connection point between them.

Therefore, when a yarn breakage phenomenon occurs during spinning operation and the yarn breakage detection member 24 is tilted, the normally open switch SW1 is closed, the electromagnet SQL is energized, and the indicator lamp L is lit, and the electromagnet SQL The fiber bundle feeding operation of the feed roller 11 is stopped by the excitation of , and the yarn breakage phenomenon is notified by lighting the indicator lamp L.

On the other hand, if the yarn breakage detection member 24 or the switch SW1 connected thereto is out of order and the yarn breakage phenomenon occurs during spinning operation, it cannot be detected.
Even though the yarn is broken, the fiber bundle 13 is fed into the combing roller 12 by the feed roller 11,
There, the opened fibers pass through the fiber conveying passage 14 and are conveyed into the rotary spinning chamber 17.

As a result, fibers accumulate in the rotating spinning chamber 17, and the fibers rub against the lid 25 that closes the opening of the spinning chamber 17, increasing the temperature in the vicinity of the spinning chamber 17.

When an abnormal phenomenon occurs and the temperature near the spinning chamber 17 rises to a predetermined value or higher, this is sensed and the resistance value of the thermosensitive element 26 increases, causing the base potential of the transistor TR shown in FIG. 2 to increase. The transistor TR becomes conductive.

Therefore, in the same way as when yarn breakage is detected, the electromagnet SQL is energized to stop the fiber bundle feeding operation of the feed roller 11, and the indicator lamp L is turned on to notify of an abnormal phenomenon.

First, the detection circuit shown in FIG. 3 detects that the electromagnet SQL for controlling the feed roller 11 is kept in an excited state during spinning operation, and when an abnormal phenomenon occurs and the electromagnet SQL is demagnetized, the electromagnet SQL for controlling the feed roller 11 is The structure is such that the fiber bundle supply operation is stopped.

In this detection circuit, a normally closed switch SW2 linked to the yarn breakage detection member 24, a transistor TR1 indicator lamp L, and an electromagnet SOL are connected in series between a power supply line E.

Further, a heat sensitive element 26 and a resistor R2 are connected in series between the power supply lines E, and a base terminal of a transistor TR is connected to an intermediate connection point between them.

Therefore, in this detection circuit, the transistor TR is in a conductive state during the spinning operation, the electromagnet SQL is excited, and the indicator lamp L is lit.

When a yarn breakage phenomenon occurs during this spinning operation, the normally closed switch SW2 is opened by tilting the yarn breakage detection member 24, the electromagnet SQL is demagnetized, and the feed roller 11 is opened.
The fiber bundle supply operation of is stopped, and the indicator lamp L
is turned off to notify the thread breakage phenomenon.

Furthermore, due to a failure of the yarn breakage detection member 24, the normally closed switch SW2, etc., the yarn breakage phenomenon is not detected, and the rotating spinning chamber 17
When fibers accumulate inside the spinning chamber and the temperature near the spinning chamber increases to a predetermined value or higher, this is sensed and the resistance value of the thermal element 26 increases, the base voltage of the transistor TR decreases, and the transistor TR becomes non-conductive.

Therefore, in the same way as when detecting yarn breakage, the electromagnet SQL is demagnetized and the fiber bundle feeding operation of the feed roller 11 is stopped, and the indicator lamp L is turned off to notify of an abnormal phenomenon.

Furthermore, in the detection circuit shown in FIG. 3, a normally closed switch SW2 is used, and when an abnormal phenomenon occurs, the electromagnet SQL is demagnetized and the fiber bundle feeding operation of the feed roller 11 is stopped. Even if a failure such as a connection failure occurs in the circuit and the thread breakage cannot be detected, the electromagnet SQL is demagnetized due to the connection failure and the fiber bundle supply operation is stopped, which is extremely safe, and the electromagnet SQL and indicator lamp L are connected in series, so unlike the detection circuit shown in FIG.
becomes unnecessary.

The present invention includes: a switch element that is activated based on a yarn breakage detection operation of a yarn breakage detection device; a heat-sensitive element that is disposed near a spinning chamber and is activated by a temperature rise in the spinning chamber;
Based on the operation of at least one of the switch element lid or the heat-sensitive element! J) is equipped with an electromagnet to stop the fiber bundle or fiber feeder, so that when yarn breakage occurs during operation of the spinning machine, the electromagnet is switched by the operation of the switch element, and the fiber is stopped. It is possible to reliably stop the operation of the bundle supply device, and if fibers accumulate in the spinning chamber without detecting the phenomenon of yarn breakage due to a failure of the yarn breakage detection means, switch element, etc., the temperature rise in the spinning chamber The heat-sensitive element operates and the electromagnet is switched to reliably stop the operation of the fiber bundle supply device, thereby preventing ignition of fibers in the spinning chamber and burnout of the bearing part of the spinning chamber drive shaft. be effective.

Note that the present invention is not limited to the configuration of the embodiment described above, and the arrangement position of the heat-sensitive element, the configuration of the detection circuit, etc. can be changed arbitrarily.

[Brief explanation of drawings]

Fig. 1 is a sectional view of the female body of an open-end spinning frame embodying the present invention, Fig. 2 is a circuit diagram showing one embodiment of the detection circuit, and Fig. 3; 1 is a circuit diagram showing another embodiment of the detection circuit. ,
FIG. 4 is a characteristic diagram showing the characteristics of the heat-sensitive element. Feed roller...11, combing roller
......12, Fiber bundle...13, Rotating spinning chamber...17, Spinning...19, Yarn breakage detection member...24, Heat sensitive Element...26, switch...SWl, SW2, electromagnet...
・SOL 0

Claims (1)

[Claims] 1. In an open-end spinning machine, a switch element that is activated based on a thread breakage detection operation of a thread breakage detection device;
The fiber bundle or fiber feeding device is stopped based on the operation of at least one of a heat-sensitive element disposed near the spinning chamber and activated by a temperature rise in the spinning chamber, a penalty switch element, or a heat-sensitive element. An abnormality detection device for an open-end spinning machine, characterized in that it is equipped with an electromagnet for detecting.