JPS609133B2 - Double twisting machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a double-twisting machine, and in particular, by improving the lower structure for controlling ballooning, it is possible to significantly reduce power consumption for operation and improve productivity. This method suppresses the generation of noise and effectively prevents deterioration of yarn quality due to friction.

In conventionally known double yarn twisting machines, a yarn feeder such as cheese or burn is held in a layer on a stationary disk that is provided concentrically with the spindle and remains stationary at all times.
A thread clamp disc is formed integrally with the spindle below the stationary disc, and an inverted truncated conical thread guiding rotating disc is integrally formed above the thread clamp disc.

Note that the spindle is normally driven via a belt. That is, the yarn pulled out in the radial direction from the yarn guiding hole of the spindle exits to the outside of the circumferential surface of the yarn clamp disk and is wound around it, and then winds around the circumferential surface of the rotating yarn guiding disk in a spiral shape at an appropriate angle. It then separates to form a balloon and is pulled upward by the guide.

However, in the above-mentioned structure, the rotating disk for guiding the yarn is very large and its inertial mass is also large, so its operation requires a large amount of power consumption.

In addition, because the surface area was large, when it rotated at high speed together with the spindle, there was a considerable loss of power due to air resistance on the surface. In addition, since the thread guide disk, which has a large inertial mass, rotates at high speed, the rock platform also vibrates violently, and in order to prevent damage caused by this, it is necessary to make the bearings and other parts strong. Furthermore, since the spindle is driven via a belt, the noise during operation is quite high, which poses a problem in terms of environmental hygiene in the workplace. As a way to solve the above-mentioned problems caused by the use of a large rotating disk for thread guidance, for example, in the invention of Japanese Patent Publication No. 49-26974, the rotating disk for thread guidance was replaced by a small shallow pot-shaped rotating disk. In addition to this structure, a support ring is placed above the rotating disk, which is supported by the rotating disk via a support, and a string balloon is brought into contact with the outer edge of this support ring to separate it into upper and lower balloons. Balloon control has been proposed.

However, even in this proposal, the rotating disk for guiding the thread is still used, although it is slightly smaller than the conventional one, and it also integrally supports an additional member called a support ring. Therefore, when viewed as a single rotating body including the support ring and its struts, the inertial mass and surface area subject to air resistance of the rotating disk for thread guidance is still considerable, so the problems described above cannot be solved. Although the situation has been alleviated somewhat, it cannot be said that it has been completely resolved.

This invention aims at a fundamental change in concept and completely eliminates the use of a rotating disk for guiding the yarn, which has been indispensably used in conventional double-twisting machines.

The only thing that rotates together with the spindle is a very shallow dish-shaped thread crab disk, and a shallow dish-shaped rotating ring is installed separately from this and spaced apart above to drive the spindle and the rotating ring. The drive of the rotary ring and the drive of the rotating ring were separated and made separate. Furthermore, a rotor made of permanent magnets was fixedly installed for the rotating ring, and an electromagnet was fixedly installed in a spaced box. The rotary ring is rotated.In this way, the spindle and the rotary ring are rotated almost synchronously, but when the thread is of a type that particularly dislikes friction, the synchronized movement of the synchronous motor and spindle is If the motor is electrically synchronized, almost completely synchronous rotation can be obtained.In particular, if the thread storage section is not required, even the thread clamp disk can be omitted. "Although it is advantageous for the spindle to be directly connected to the motor in terms of noise prevention, it may also be driven by a belt as in the conventional method.Hereinafter, the present invention will be described in more detail with reference to the embodiments shown in the attached drawings. I will explain about it.

FIG. 1 shows an example in which the present invention is applied to a double twisting machine for cheese C.

The spindle 1 is driven and rotated by a motor 3 directly connected to its lower end.

The thread guide hole 5 formed in the axial direction of the spindle 1 closes in the radial direction J at its lower end, and guide pins 7 are arranged in a group across the thread guide hole 5 near the entrance. There is. A thread clamp disc 9 in the form of a hollow flange is fixed by screws 11 at approximately the center in the axial direction of the spindle 1, spaced apart from and surrounding the above-mentioned closed part. 〈It is formed into an extremely shallow structure. A guide eye 13 is provided horizontally at an appropriate position on the circumferential surface of the thread collection disk 9, corresponding to the closed portion of the spindle thread guide hole 5. This thread collection disk 9 is provided so that the thread Y pulled out from the guide eye 13 is wound around the surface thereof over an appropriate distance to keep the balloon tension constant. Of course, as the motor 3 rotates, the spindle 1 and the thread collection disk 9 rotate as one.

However, in this invention, the yarn guide in the conventional general double-twisting machine is not replaced by a yarn guide having a relatively deep structure and a large inertial mass, which is integrally formed in the shape of an inverted truncated cone above the yarn collection disk. The rotating disc (which rotates together with the spindle and thread collection disc) is not used. A sleeve 17 is inserted into the spindle 1 via a bearing 15, and a stationary disk 21 in the shape of a shallow pan is fixed to the sleeve 17 with a screw 19.

Further, a bobbin B for cheese C is fixedly mounted on the sleeve 17 via an attachment 16, and a cover 23 for separating the cheese C is fixedly supported on the stationary disk 21. Further, a permanent magnet 25 is fixedly mounted at a suitable position on the circumference of the stationary disk 21, and another permanent magnet 27 is fixed on a frame (not shown) opposite to this. Both magnets 25 and 27 are arranged so as to attract each other, and the stationary disk 21 is prevented from rotating due to the magnetic attraction between them. That is, even if the spindle 1 and the thread collection disk 9 are driven and rotated by the motor 3 as described above,
The stationary disk 21 and the cheese C are stationary.

This stationary state holding structure is conventionally known. At least three pins 29 are vertically fixed to the periphery of the stationary disk 21 (only one of them is shown in the figure),
A bearing 31 is inserted into each pin 29, and a rotary ring 33 is engaged with each of the bearings 31 through an inner circumferential groove thereof and is rotatably held therein. This rotary ring 33 has a substantially L-shaped cross section, and its peripheral green portion 33a comes into frictional contact with the thread Y passing at high speed as shown in FIG. 2, so it may be plated as appropriate. It is desirable to provide wear resistance by surface treatment with alumina. A rotor 35 made of a ring-shaped permanent magnet is fixed on the outside of the rotating ring 33.

An electromagnet 37 is provided surrounding the rotor 35. That is, when the electromagnet 37 is excited by an alternating current, a magnetic field is generated, which applies torque to the rotor 35, causing the rotor 35 to rotate together with the rotating ring 33.
By the way, when installing the bearing 31 on the stationary disk 21 using the pin 29, it is necessary to connect the drum shaft of the bearing 31 and the attachment axis to the stationary disk 21 (in the embodiment shown in FIG. 6, which will be described later, to the frame F). By making the mounting shaft slightly eccentric, the gap between the bearing 31 and the rotating ring 33 can be freely adjusted, which is convenient for assembly.

Furthermore, if the upper and lower slopes of the outer periphery of the rotor 35 and the slope of the inner periphery of the electromagnet 37 are matched to the balloon shape of the thread as shown in the figure, the gap between them can be made extremely small. This improves operating efficiency as a synchronous motor.

Furthermore, it is preferable to provide a flange that opens upward to cover the lower surface of the stationary disk 21 on the upper outer periphery of the thread collection disk 9.

By providing such a flange, the winding part of the thread is restricted to the lower side and does not go up, so the thread does not come into contact with the stationary disk 21 and break. In the apparatus of the present invention, as described above, the thread guiding rotating disk integrated with the thread collecting disk is not used, but instead, a rotating ring 33 separate from the thread collecting disk 9 is used.

Therefore, the thread collecting disk 9 driven by the motor 3 via the spindle 1 and the rotating ring 33 driven by the electromagnet 37 via the rotor 35 must rotate synchronously, otherwise the thread Y If the yarn is weak due to friction, the quality of the yarn will deteriorate. Incidentally, the electromagnet 37 and the rotor 35 made of a permanent magnet constitute a kind of synchronous motor.

Therefore, if a synchronous motor is also adopted as the motor 3 for driving the thread spool disc, by electrically synchronizing both motors, it is possible to rotate the thread spool disc 9 and the rotation ring 33 synchronously. An example of an electric circuit for performing such synchronous rotation is shown in FIG.

That is, the frequency setter FF for setting the rotation speed is connected to the spindle motor M (corresponding to the motor 3 shown in FIG. 1) and the rotating ring motor M' via the variable frequency device VF.
(corresponding to the combination of electromagnet 37 and rotor 35 shown in FIG. 1) are connected in parallel. Note that the suffix in the figure indicates the weight of the twisting machine. When the rotation speed setting signal is given to the variable frequency device VF by the frequency setter FF,
The latter made of semiconductor controls the frequency and voltage to predetermined values, which are applied to both motors-M and M', thereby determining the output rotational speed of the motors.

If synchronous motors are used for both motors M and M', and the frequency determined by both circuit elements FF and VF is f, the rotation speed n is determined by n=12 pi/P (P is the number of poles of the motor); All motors rotate synchronously at different rotational speeds.

If one induction motor is used for both motors M and M', each motor will not be completely synchronized, and as a result, a difference will occur in the rotation speeds of the thread collection disk 9 and the rotating ring 33.

However, when threading threads that are resistant to friction, such as nylon threads, even if there is a slight difference in rotational speed between the two threads, it has no effect on the quality of the threads. It is preferable to use an induction motor, which is relatively cheap. Alternatively, the spindle side may be an induction motor and the rotor side may be a hysteresis motor. In the above example, the spindle 1 is connected to the motor 3, but it may be connected to the motor via a pulley and a belt as is conventionally done. As is clear from the above explanation,
According to this invention, the conventionally used rotating disk for thread guidance with a large inertial mass is replaced with a rotating ring with a small inertial mass, thereby making it possible to significantly reduce power consumption. .

In addition, problems caused by machine vibration have also been eliminated. In addition, since the rotating ring (including the rotor) has a structure with an extremely small surface area, the air resistance on the surface is small even when rotating.
From this point of view as well, power consumption can be reduced.

Furthermore, by making various changes to the shape of the rotating ring, it is possible to shorten the distance between the yarn guide (i.e., the green part around the ring shown in Figure 2) and the upper yarn guide, and as a result, the balloon tension is reduced. However, the spindle rotation speed can be increased by that amount, and productivity can be improved. Furthermore, when the spindle is directly connected to the motor, not only is the structure simpler, but the noise that occurs in the conventional belt drive system is eliminated.

Furthermore, if a synchronous motor is used, the thread collection section (thread collection disk 9
) and the thread guide section (rotating ring) rotate synchronously, so friction between the thread and the thread guide section is completely eliminated, effectively preventing deterioration in yarn quality.

FIG. 4 shows an example in which the present invention is applied to a double twisting machine for burning.

Although there are some minor design changes in the structural details due to the differences between the cheese and burn types, the basic structure is the same as that shown in FIG. 1. That is, the thread collection disk 9 is driven and rotated by the motor 3 via the spindle.

A stationary disk 21 inserted into the spindle 1 via a bearing 15 is prevented from rotating by a magnetic attraction force acting between permanent magnets 25 and 27. A rotating ring 33 rotatably supported by a bearing 31 fixed to a stationary disk 21 has a rotor made of a permanent magnet along its inner circumference.
36 is integrally supported, and the rotor 3 is connected from the electromagnet 37 to the
It rotates due to the torque acting on 5. The example shown in FIG. 5 is suitable for twisting thin threads such that the balloon is difficult to open and the balloon comes into contact with the upper end of the cover, and has a pair of upper and lower rotating rings.

The structure around the rotating ring 33 provided on the lower side of the cheese C is the first
It is similar to that shown in the figure. Correspondingly, a stationary ring 39 is fixed to the outer periphery of the cover 23 at a vertical position close to the upper end of the cheese C, and this stationary ring 39 has three or more bearings 43 fixed to it by pins 41.
is constructed with its axis vertical. A rotary ring 45 is rotatably held on the outside of these bearings 43 relative to the stationary ring 39, and a rotor 46 made of a permanent magnet is fixed along the inner circumference of the rotary ring 45. An electromagnet 47 is fixedly installed in a spaced apart view of the rotary ring 45, and when the electromagnet 47 is excited, torque acts on the rotor 46, and the rotary ring 45 integrated therewith rotates. The synchronous motor constituted by the rotor 46 and the electromagnet 47 may be electrically synchronized with the synchronous motor constituted by the lower rotor 35 and the electromagnet 37 and the spindle driving motor. Although the case of a double combustion yarn machine for cheese is shown here, it is of course possible to achieve the same effect in the case of a burner by providing a pair of upper and lower rotating rings with a slight design change.

Now, in each of the examples shown above, the thread collection section (i.e., thread collection disk) and the thread guide section (i.e., rotation ring) are separated and rotated individually (and preferably in synchronization), and The structure is such that a bearing is installed on a stationary disk to hold the rotating ring. However, in cases where the thread spool section is not particularly required, as shown in the example shown in Figure 6, the thread spool disk can be omitted and the bearing for holding the rotating ring can be placed in the frame of the machine instead of the stationary disk. It may be constructed in That is, the stationary disk 49 is constructed in the same manner as in the previous example with respect to the spindle, but has a much simpler shallow dish shape.

Also, a permanent magnet 2 for holding the stationary disk 49 stationary.
The inner parts of 5 and 27 are installed inside the cover 23. Three or more bearings 53 are installed at appropriate positions on the machine frame F via pins 51, and being held by these bearings 53, a rotating ring 55 can rotate around the spindle 1 at a distance. It is provided. A rotor 3 made of a permanent magnet is mounted on the outer periphery of this rotating ring 55.
5, an electromagnet 37 is further provided at a distance from the outside thereof, and these constitute a synchronous motor. Furthermore, a guide eye 13 is attached for passing the thread Y through the upper surface of the peripheral green part of the rotating ring 55. In addition, in the case of this embodiment, the entrance part of the thread guide hole 5 and the guide eye 13
must be perfectly synchronized in rotation.

Therefore, in terms of motor combination, it is inconvenient to use synchronous motors on both the spindle side and the rotating ring side. Although the omission of the spool disk causes some variation in the tension and shape of the balloon, in most practical cases the variation is negligible.

Even if the fluctuation cannot be ignored, it is possible to sufficiently regulate the fluctuation by using an appropriate compensator. Although the case of a double-twisting machine for cheese is shown here, a similar structure can be obtained for a burner by making some design changes.

[Brief explanation of the drawing]

FIG. 1 is a sectional side view of a main part showing an example of applying the present invention to a double twisting machine for cheese. FIG. 2; a partially enlarged side sectional view of the structure shown in FIG. 1; FIG. 3: A diagram showing an example of a rotation synchronous electric circuit used in the double twisting machine of the present invention. FIG. 4: A sectional side view of a main part showing an example of applying the present invention to a double twisting machine for burn. FIG. 5: A sectional side view showing another example in which the present invention is applied to a double twisting machine for cheese. FIG. 6: A side sectional view of a main part showing still another example in which the present invention is applied to a double twisting machine for cheese. B...Bobbin, C...
Cheese, F...frame, P...burn, Y...thread, 1...spindle, 3...motor, 9...thread collecting disk, 21,49
... Stationary disk, 23... Cover, 25, 27... Permanent magnet, 31, 43, 53... Bearing, 33, 45
, 55... Rotating ring, 35, 46... Rotor, 37, 4
7... Electromagnet, 39... Stationary ring, FF... Frequency setter, VF... Variable frequency device. Figure 1 Figure 2 Figure 3 Figure 4 Figure 5 Figure 6

Claims (1)

[Scope of Claims] 1. A stationary disk for placing and supporting the yarn supplying body is provided concentrically with a spindle that rotates at high speed, and this stationary disk is
It is held stationary by an attached rotation prevention element, and at a position below the stationary disk, there is a shallow dish-shaped thread collecting disk formed integrally and concentrically with the spindle. A guide eye is provided for pulling out the thread.
A shallow dish-shaped rotating ring is held concentrically and rotatably with respect to the stationary disk by bearings provided at at least three locations on the periphery of the stationary disk. A rotor consisting of a permanent magnet is fixedly installed, and an electromagnet fixedly installed surrounding the rotor is connected to an excitation circuit and electrically combined with the rotor to form a kind of motor. Heavy twisting machine. 2. The double yarn twisting machine according to claim 1, wherein the excitation circuit is configured such that the spindle driving motor and the motor constituted by the electromagnet and rotor rotate periodically. 3. The double yarn twisting machine according to claim 1, wherein the portion of the rotating ring that comes into contact with the yarn is subjected to an anti-wear treatment. 4 A stationary ring is fixed to the outside of the cover for the yarn feeder at a distance above the rotating ring, and a shallow dish-shaped a second rotating ring is rotatably held concentrically with respect to the stationary ring; a second rotor made of a permanent magnet is installed along the outer periphery of the second rotating ring; and , a second electromagnet fixedly installed at a distance surrounding the second rotor is connected to the excitation circuit, and is electrically combined with the second rotor to constitute a kind of motor. A double twisting machine according to scope 1. 5. The double twisting machine according to claim 1, wherein the spindle is directly connected to a driving motor. 6 A stationary disk that supports the yarn feeder is installed concentrically with a spindle that rotates at high speed, and this stationary disk is
An attached rotation blocking element holds the spindle stationary despite the spindle rotation, and bearings provided at at least three locations on the machine frame around the spindle cause the shallow dish-shaped rotating ring to lock onto the spindle. are rotatably held concentrically and spaced apart from each other,
A guide eye for thread withdrawal is formed on the upper periphery of this rotating ring, and a rotor made of a permanent magnet is fixed on the outer periphery of the rotating ring. A double yarn twisting machine in which an electromagnet is connected to an excitation circuit and electrically combined with the rotor to constitute a synchronous motor. 7. The double yarn twisting machine according to claim 6, wherein the excitation circuit is configured so that a spindle driving motor and a synchronous motor constituted by the electromagnet and rotor rotate synchronously. 8. The double twisting machine according to claim 6, wherein the spindle is directly connected to a driving motor.