JPS5834575B2 - open end - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a clutch device for a textile material supply roller of an open-end spinning machine, and more particularly to a clutch device for a textile material feed roller of an open-end spinning machine, and more particularly a clutch device for a textile material supply roller of an open-end spinning machine, and more particularly a clutch device for a textile material supply roller of an open-end spinning machine, and more particularly a clutch device for a textile material feed roller of an open-end spinning machine, and more particularly a clutch device for a textile material supply roller of an open-end spinning machine, and more particularly for a clutch device for a textile material feed roller of an open-end spinning machine, and more particularly for a clutch device for a textile material feed roller of an open-end spinning machine. The present invention relates to a clutch device comprising:

In open-end spinning machines, the feeding rollers are equipped with clutch devices to control the feeding of the fibers.

Until now, electromagnetic clutches have been used, which have spur gears on both the driving and driven discs, the gears engaging each other, and an electromagnet acting on the armature on either disc. It is a structure that is firmly attached to the

When the electrical circuit of the electromagnetic winding is closed, the armature is drawn towards the electromagnetic shell and the spur gears are thus disengaged.

In the working position, both discs are pressed together by springs.

Additionally, mechanical clutch devices have been used, some of which operate in a manner that immobilizes the driven disc.

When a thread breakage occurs, a sensor detects the thread tension and prevents the driven disc from moving.

In these clutch devices, both disks are elastically pressed against each other, and slippage occurs between them while the driven disk is immobilized.

In addition to the clutch mechanism described above, a method is actually used in which the supply of fibers is controlled by releasing the pressurizing block of the supply member rearward.

The disadvantages of pawl clutches include a delayed response when engaged and, in the worst case, the driving disk must rotate by a maximum pitch tooth relative to the driven disk.

This is necessary when the supplied fiber material is sent to the opening device at a defined time, and when the fibers opened by the opening device are sent to the spinning chamber of the open-end spinning machine, and at the specified time. A particular disadvantage arises when the yarn ends are fed back into the spinning chamber independently of the spinning chamber and then spliced onto a ribbon of fibers on the converging surface of the spinning chamber.

That is, due to the delay in the response of the pawl clutch device, the possibility of removal of the thread breakage decreases in proportion to the delay, and if this occurs, the splicing operation will be repeated.

The electromagnetic clutch currently used transmits the torque required to disconnect the electromagnetic winding from the power source.

For this reason, there is no peace of mind if a defect occurs in the electrical circuit.

Also, if the shaft moves in its axial direction when the electromagnetic clutch is activated, a major problem will occur.

That is, movement of the shaft simultaneously causes axial movement of the feed roller.

Therefore, in such a case the outer surface of the feed roller is at least partially out of contact with the sliver to be fed into the open-end unit.

Therefore, problems arise in the feeding conditions of the fiber material to be spun.

It deteriorates continuous delivery and uniformity.

Occasional interruptions to the spinning process therefore occur.

In addition, the quality is affected, and problems such as the spun yarn becoming thinner occur.

The disadvantage of thinner yarns is compensated for by slowing down the spinning process so that the required yarn count is spun, but this results in the disadvantage of reduced yarn yield.

It is important from this point of view that shaft movements should be avoided as much as possible, so as to ensure that there are no adverse working conditions in the open-end spinning unit and a continuous spinning of favorable quality. It is.

The object of the present invention is to make the electromagnetic clutch respond immediately when the position is changed from the stopped position to the activated position and vice versa, to be simple to manufacture, and to be able to easily respond in the event of a malfunction in the electric circuit. The goal is to obtain a clutch that can be used with peace of mind.

The main part of the clutch of the present invention is that a fixed disk is mounted concentrically and movably in the axial direction on the shaft of the feeding device between the drive wheel and the winding, and a ferromagnetic shaft is attached to the outer periphery of the disk. It has a structure in which there is a free air gap between the ferromagnetic shaft and the shell of the electric winding.

The advantages of the clutch device of the present invention are mainly that the actuation is fast, the design is simple, no adjustment is required after installing this clutch device, and when the clutch device is actuated, the shaft is rotated in its axial direction. There should be no force exerted on it at all.

Embodiments of the present invention will be described in detail below with reference to the drawings.

FIG. 1 shows a basic embodiment of the clutch of the present invention, including the operating mechanism of a spinning unit in an open-end spinning frame, in which a drive wheel 1 fixes a supply roller 3;
It fits over the shaft 2, which is fitted with a fixed disc 4.

In the internal chamber 100 of the clutch according to the invention, an electrical winding 6 is installed, the body 12 of which is installed inside the inner shell 15.

A fixed disk 4 is attached to the shaft 2 with a key 24 for axial movement in a position between the drive wheel 1 and the winding 6, on which is a ferromagnetic shaft 5.

There is an air gap between the shell 15 of the winding 6 and the ferromagnetic ring of the fixed disk 40, where no resistance occurs.

The fibers 20 pass through the supply roller 3 , the opening cylinder 18 , and the spinning chamber 19 to become yarn 16 and are wound around the bobbin 17 .

In the embodiment shown in FIG. 2, the drive wheel 1 has an armature 8 fitted onto a shaft 2 with a pole plate 9.

Furthermore, in this embodiment, a fixed disk 4 with a ferromagnetic shaft 5 is mounted on the shaft 2 for axial movement by means of a key 24.

A diamagnetic insert 10 is mounted between the armature 8 and the fixed disk 40 and the ferromagnetic ring 5.

The embodiment shown in FIG. 3 differs from the embodiment in FIG. , the armature 8 or the fixed disk 40, the tilting ring of the ferromagnetic ring 5, or both are provided with a layer of diamagnetic material on their contact surfaces.

A fixed disk 4 having a ferromagnetic portion as shown in FIG.
(In this embodiment, there is a braking device 13 on the contact surface of the fixed disc 4 with the main body 12 of the winding 6 and also on the contact surface of the fixed disc 4 with the main body 12 of the winding 6. are engaged with each other when the clutch is de-energized with respect to the case.

The engaging portion is formed in the shape of a spur gear or a friction surface formed on the above-mentioned contact surface.

The embodiment of FIG. 4 therefore has a spring 14 which is arranged in the six holes of the shaft 2 and a pin 21 which passes freely through the transverse hole 22 of the shaft 2. The pin 21 is a pin attached to the fixed disk 4.

In the embodiment shown in FIG. 5, the fixed disk 4 is provided with a magnetic pole plate 9, a washer 23 is mounted in the recess of the shaft 2, and a spring 14 is attached toward the washer 23.
This is the configuration in which the two are in contact.

Otherwise this embodiment does not differ from that described above.

The clutch according to the present invention has a function of controlling the supply of fiber material by the supply roller 3.

When the supply roller 3 stops, the fiber material 20 is not supplied to the opening roller 18.

Therefore, split fibers are not supplied to the spinning chamber 19.

Yarn 16 produced in the spinning chamber 19 is pulled out from the spinning chamber 19 and wound onto a bobbin 17.

When thread breakage occurs, thread splicing is necessary.

That is, it is necessary to connect the yarn end of the yarn 16 to a fiber ribbon formed on the fiber collecting surface of the spinning chamber 19.

This fiber ribbon has already been formed from the spread fibers supplied to the spinning chamber 19, and must already be formed on the fiber collecting surface of the spinning chamber 19 at the moment when the end of the yarn 16 is returned to the spinning chamber 19. .

That is, a fiber ribbon must be formed before the yarn end of the yarn 16 is returned to the spinning chamber 19.

This is done as follows.

The clutch is activated relatively before the end of the yarn 16 is returned to the spinning chamber 19.

To obtain this result, the electrical circuit of coil 6 must be closed.

In this case, the coil 6 excites an electric field, which is closed through the shell 15 of the coil 6, the shaft 2, the drive wheel 1 or the armature 8, the ferromagnetic part 5 and the air gap I.

The air gap 7 functions as a non-resistance air gap when the disk 4 is moved to be fixed to the drive wheel 1 and even when torque is transmitted to the disk 4, and therefore also eliminates the axial force on the bearing of the shaft 2, and the installation It also has the effect of simplifying the process.

The air gap 15' between the shaft 2 and the shell 15 of the coil 6 is designed to be negligible from the point of view of the electromagnetic flux.

The electric field configured in this way applies an attractive force in the axial direction to the drive wheel 1.
Alternatively, it acts between the armature 8 and the ferromagnetic portion 5 on the disk 4.

Torque is transmitted at the contact surfaces of these two elements.

When transmitting such torque, the disk 4 having the ferromagnetic part 5 on the outer periphery is moved in and out along the shaft 2, and a non-resistance gap is formed between the ferromagnetic part 5 and the shell 15, so that the drive does not move in the axial direction. The magnetic pole on the disk 4 side that is attracted to the magnetic pole of the ring 1 or the armature 8 is formed at the outermost end of the ferromagnetic part 5,
At the stage when the disk 4 is attracted and fixed, no force that applies an axial movement force to the shaft 2 is applied to the shell 15 anymore.

As is clear from the explanation of the magnetic field in FIG. 6, only the disk 4 appears and disappears as an attraction magnetic pole in the electromagnetic field formed between the shell 15 and the drive wheel 1 or its armature 8 and shaft 20. It can also be understood from

If a failure occurs in the electrical circuit or if the circuit opens for some reason, the power supply to the coil 6 is cut off.

Therefore, the electric field disappears, and the driving wheel 1 and the driving disk 40
The attractive force between the ferromagnetic rings 5 virtually disappears.

Even with the passive resistance acting on the feed roller 3, the shaft 2
stops.

The drive wheel 1 can be made of ferromagnetic or non-magnetic material.

In the latter case it is necessary to use a ferromagnetic armature 8.

In order to increase the transmitted torque with the same human force value of the coil 6,
One magnetic pole plate (Fig. 2) is provided on the shaft 2.

If a non-magnetic material 10 (FIG. 2) is inserted into the clutch, the clutch operation will have an improved disengagement function.

That is, on the one hand, the electric field dissipates more quickly, and on the other hand, the insert 10 substantially reduces the residual torque of the clutch caused by the residual magnetism of the ferromagnetic parts.

As shown in FIG. 3, a similar effect can be achieved by using a layer 11 of non-magnetic material.

In the embodiment of FIG. 4, the torque is transmitted from the fixed disc 4 on the shaft 2 by means of a pin 21;
1 slides in a transverse hole 22 on the shaft 2 together with a fixed disk 4 having a ferromagnetic part 5.

After the magnetic field is generated, the fixed disk 4 and the ferromagnetic ring 5 are attracted in the direction of the armature 8, and the fixed disk 4 with the ferromagnetic ring 5 moves downwards together with the pin and pulls the spring 14 with the pin 21. Compress.

Whether the surface of the main body 12 of the winding 6 and the surface of the fixed disk 40 with the ferromagnetic ring 5 are gear-shaped or friction surfaces, the ferromagnetic ring 5 with the fixed disk 4 does not come into contact with the armature 8. That is, the brake device 13 is separated before torque is transmitted.

When the circuit of the winding 6 is opened, the magnetic field disappears and the spring 14 pushes the fixed disk 4 with the ferromagnetic ring 5 away from the armature 8.

An engagement between the fixed disc 4, the body 12 of the winding 6 and the brake device 13 then takes place, so that complete braking of the shaft 2 is possible.

In the embodiment of FIG. 5, if the electrical circuit is broken, the winding 6
The magnetic field disappears and the spring 14 pushes the fixed disc 4 away from the drive wheel 1.

The operation of the spring 14 is restricted by the washer 23 located in the recess of the shaft 2 in a position where there is a slight axial clearance when the disc 4 is in a separated state.

This results in the minimum torque value when the winding is opened.

As is clear from the above description, the present invention provides a disc comprising a ferromagnetic ring 5 which also functions as a magnetic pole in a magnetic field formed between the shell 15, the shaft 2, the drive wheel 1 or the armature 8 of the drive wheel 1. Since the supply roller can be started and stopped simply by moving the roller 4 in and out, it functions sharply with a small magnetic force, compared to the case where the shell 15 or the drive wheel 1 moves to engage and disengage using magnetic force. 2, there is no need for large starting and stopping torques that would rotate the housing (shell) containing the coil, and the shaft 2 directly transmits magnetic flux. Stopping without time lag, which is particularly important when stopping the raw material supply device of an open-end spinning frame, is achieved, and a compact clutch device that is preferable from a practical point of view is obtained.

[Brief explanation of the drawing]

FIG. 1 is a partial cross-sectional view showing a device for controlling fiber feeding in an open-end spinning frame using the clutch of the present invention, FIG. 2 is a cross-sectional view of another embodiment of the present invention, and FIG. 4 and 5 each show a sectional view of yet another embodiment, and FIG. 6 is an explanatory diagram of an electromagnetic field using FIG. 3 as an example. 1 is a drive wheel, 2 is a shaft, 3 is a supply roller, 4 is a fixed disk, 5 is a ferromagnetic wheel, 6 is a winding, 7 is a gap, 8
1 is an armature, 9 is a magnetic pole plate, 10 is a diamagnetic insertion member, 11 is a diamagnetic material, 12 is a main body, 13 is a brake device, 15 is an inner shell, 22 is a horizontal hole, and 24 is a key.

Claims (1)

[Claims] 1. A shaft having a member for supplying a fiber material, a drive wheel rotatably fitted onto the shaft, and an electrical winding for generating a magnetic field. The winding is wound on a stationary body surrounding its shaft, and the clutch device of the open-end spinning machine for controlling the feed of the textile material to be processed is fixed on the outer surface of the fixed disc 4. a ferromagnetic ring 5 whose disk is axially movably mounted on the shaft 2 and is located between a winding 6 and said drive wheel 1, the diameter of the ferromagnetic ring being equal to the diameter of the winding. The diameter is such that there is a gap 7 between the shell 15 of the winding 6 and the surface of the ferromagnetic ring 5, and the magnetic field is closed from the shell 15 of the winding 6 to the ferromagnetic ring 5 via the gap 1. Therefore, when the winding 6 is energized, a magnetic field is created through the shaft 2, which causes the disk 4 to move along the shaft 2, but without causing any axial movement of the shaft 2, to the drive wheel 1. is in close proximity to and in contact with the shaft 2, so that the torque is transferred from the drive wheel
However, the magnetic field passing through the gap 7 is transmitted to the ferromagnetic ring 5.
A clutch device for an open-end spinning machine, characterized in that it does not apply any force that would move any shaft in the axial direction.