JPH0444626Y2 - - Google Patents

Description

[Detailed Description of the Invention] Purpose of the Invention (Field of Industrial Application) This invention relates to a rotor incorrect position detection device for an open-end spinning machine.

(Prior Art) Generally, in an open-end spinning machine, as shown in FIG. 4, a sliver supplied from a sliver supply port (not shown) is opened by a combing roller 31, and the opened fibers are rotated at high speed. The air flow generated in the transport channel 33 due to the negative pressure in the rotor 32 that causes the air to flow into the rotor 32 is blown into the rotor 32 . The fibers fed into the rotor 32 adhere to the inner wall surface of the rotor 32 by riding on the swirling air current generated by the action of the rotor 32 rotating at high speed, and then are focused at the focusing portion 32a formed at the maximum inner diameter part, and are While being twisted by rotation, the yarn is pulled out by a pull-out rotor (not shown) through the yarn pull-out hole 35 of the navel 34 as a guide and the yarn pipe 36, and is wound into a package cage by a winding device (not shown). It's summery.

In addition, the support structure of the rotor 32 is
As described in Publication No. 32409, etc., as shown in FIG. 5, there is a rotor shaft 38 in which the rotor 32 is mounted in a wedge-shaped recess formed by two pairs of rotatably supported support discs 37. is placed and pressed against the support disk 37 by a belt 39, and the rotor shaft 38 is rotationally driven by the running of the belt 39. Further, the support disk 37 is rotated by the rotor shaft 38.
The thrust bearing 40 is disposed in a slightly inclined state so that a force is applied to the thrust bearing 40 side.

(Problem to be solved by the invention) The yarn Y pulled out from inside the rotor 32 is
The part that contacts a rotates (revolutions) together with the rotor 32 around the thread pull-out hole 35 of the navel 34.
Since actual twist is applied by doing this, in order to spin a homogeneous yarn, the center of the rotor 32 and the center of the navel 34 must be aligned, and the allowable range of misalignment is 0.2 to 0.3 mm. This is an extremely small value. However, in the conventional device, the support disk 37 has a rubber portion 37a formed on its outer periphery, and since the rotor shaft 38 is strongly pressed against the rubber portion 37a by the belt 39, the rubber portion 37a is worn out due to friction. do. As a result, the rotor 32
A shift occurs between the center of the rotor and the center of the navel 34, and the distance between the maximum inner diameter of the rotor and the navel 34 becomes irregular, which not only causes a decrease in the quality of the spun yarn, but also causes further wear and tear between the rotor 32 and the channel part. 41 may come into contact with the rotor and cause damage to the rotor.

Structure of the invention (means for solving the problems) In order to solve the above problems, in this invention, the support discs are pressed into a wedge-shaped recess formed by two pairs of support discs. A detection device is provided for detecting when the amount of displacement of the rotor shaft supported in a biased state in the pressing bias direction exceeds a reference value.

(Function) In this device, the support disk wears out due to friction with the rotor shaft as the machine is operated, and the amount of displacement of the rotor shaft from the reference position becomes large enough to cause deterioration of the quality of the spun yarn. , a detection device detects it and issues a detection signal.

(Example 1) Next, a first example embodying this invention will be described with reference to FIGS. 1 and 2. A rotor shaft 2 on which a rotor 1 is mounted is horizontally supported in a wedge-shaped recess 4 formed by a rotatably supported support disk 3, as in the prior art device. The belt 5, which runs perpendicularly to the rotor shaft 2, presses and urges the support disk 3 toward the support disk 3, and rotates as the belt 5 runs. A detection device 6 is disposed below the rotor shaft 2 to detect when the amount of displacement of the rotor shaft 2 exceeds a reference value. In the detection device 6, a lever 8 is rotatably attached to a support shaft 7 fixed at a predetermined position within a plane orthogonal to the rotor shaft 2. The lever 8 is used to move the rotor shaft 2 when the rotor 1 shifts to a position that causes deterioration of yarn quality.
One end is placed in contact with the other end. The other end of the lever 8 is connected to an alarm circuit 12 that includes a power source 9, a relay 10, and a lamp 11 as an alarm device.
The switch 13 is connected to the switch 13, and when the lever 8 rotates, the switch 13 is turned on. The length of the lever 8 from its center of rotation to the end on the switch 13 side is much longer than the distance from its center of rotation to the end on the rotor shaft 2 side.

Next, the operation of the apparatus configured as described above will be explained. As the support disk 3 wears down due to friction between the rotor shaft 2 and the support disk 3 due to long-term operation of the machine, the position of the rotor 1 together with the rotor shaft 2 deviates from the reference position. When a deviation (displacement amount) exceeding an allowable range occurs, which leads to deterioration of the quality of the spun yarn, the rotor shaft 2 comes into contact with the end of the lever 8. When the rotor shaft 2 contacts the end of the lever 8, the lever 8 is rotated about the support shaft 7 due to the rotational action of the rotor shaft 2. The switch 13 is determined by the length from the support shaft 7 to the end of the rotor shaft 2 side.
Rotor shaft 2 has a very long length to the side end.
Since the amount of movement on the switch 13 side is greatly expanded compared to the amount of rotation on the rotor shaft 2
When the lever 8 and the lever 8 come into contact with each other, the switch 13 is surely turned on. When the switch 13 is turned on, the lamp 11 is turned on, the relay 10 is energized, and the driving motor for the belt 5 is stopped by the action of the relay 10. The operator confirms that the lamp 11 is lit and replaces the support disk 3 of the spinning unit.

(Example 2) Next, a second example will be described with reference to FIG.
In this embodiment, a device that detects the amount of displacement of the rotor shaft 2 based on changes in the magnetic field is used as the detection device. That is, a magnet 14 is embedded in the end of the rotor shaft 2, and a Hall IC 15 is provided at an upper position corresponding to the magnet 14. The Hall IC 15 is adapted to output an output voltage corresponding to the distance of the magnet 14, that is, the rotor shaft 2, to the control device 16. The control device 16 inputs the signal from the Hall IC 15 and controls the rotor shaft 2 and the Hall based on the signal.
The distance between the IC 15 and the IC 15 is calculated, and the value is compared with a reference value corresponding to the amount of displacement of the rotor shaft 2 that leads to deterioration of the yarn quality of the spun yarn. If the value becomes larger than the reference value, the lamp 11 is turned on and the machine is activated. It is designed to output a machine stop signal.

Note that this invention is not limited to the above-mentioned embodiments; for example, a photoelectric switch, a potentiometer, etc. may be used as the detection device 6, or a structure in which the rotor shaft 2 is driven by a belt 5 common to all the spindles may be used. Alternatively, the rotor shaft 2 of each spindle may be configured to be driven by an independent motor, and only the spinning unit may be stopped based on the detection signal from the detection device 6. Alternatively, when the detection device 6 detects an abnormality, the machine may not be stopped, but only the lamp 11 as an alarm device may be operated. In this case, it is necessary to set the reference value for activating the detection device 6 to a value that is slightly more generous than the value that reduces the deterioration of the thread quality.

Effects of the invention As detailed above, according to this invention, the machine can continue to operate even when the misalignment between the center of the rotor and the center of the navel reaches a size that adversely affects the quality of the spun yarn. This has an excellent effect in that it is possible to reliably prevent such occurrences, and the operator can immediately take necessary measures such as replacing parts, and can always spin high-quality yarn.

[Brief explanation of the drawing]

Figures 1 and 2 show a first embodiment of this invention, with Figure 1 being a schematic perspective view and Figure 2 being a schematic perspective view.
The figure is a side view of the main part to explain the operation, Fig. 3 is a schematic diagram showing the second embodiment, Fig. 4 is a cross-sectional view of the main part of the open-end spinning machine, and Fig. 5 is the state in which the rotor shaft is supported. FIG. A rotor 1, a rotor shaft 2, a support disk 3, a detection device 6, and a lamp 11 as an alarm device.

Claims (1)

[Scope of utility model registration request] In an open-end spinning machine in which a rotor shaft is supported in a wedge-shaped recess formed by two pairs of support disks in a state in which the rotor shaft is urged by the support disks, the direction in which the rotor shaft is urged An incorrect rotor position detection device for an open-end spinning machine is equipped with a detection device that detects when the amount of displacement exceeds a reference value.