JPS5835669Y2 - spinning equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in a spinning device, such as a roving frame or a spinning frame, which is equipped with a draft mechanism for fiber bundles using rollers.

More specifically, the present invention relates to a spinning device that automatically processes the supplied fiber bundles in accordance with the state of the spinning device when the spinning device is stopped and then restarted, thereby facilitating the restart.

As is well known in the art, a filament machine, a roving frame, and a spinning frame are used to sequentially thin a sliver, which is a type of fiber bundle made of staple fibers, to form a spun yarn.

Among these spinning machines, in roving frames and fine spinning machines, the draft mechanism for stretching the fiber bundle usually consists of a bottom roller that extends in the longitudinal direction of the machine frame and is connected to a drive source, and a unit of one or two spindles. In many cases, two or more groups of rollers (including a draft apron in some cases) consisting of a top roller that rotates in pressurized contact are arranged in the traveling direction of the fiber bundle.

In these draft mechanisms, the roller groups arranged sequentially downstream from the back roller to which the fiber bundle is supplied are configured to operate at high speed.

Among spinning machines with a draft mechanism as described above, even ring spinning machines operated at relatively high speeds were used at a low speed of several tens of meters per minute at best, so even if abnormalities such as thread breakage occurred, the ring spinning machines would remain unaffected. The fiber bundles were left in the supplied state until a worker or an automatic working machine came and completed the splicing, and the fiber bundles were sucked in as waste by a pneumophile installed downstream of the front roller.

In this way, even if the supply of fiber bundles were continued even after an abnormality such as thread breakage occurred downstream, the amount that would occur would not be such a problem.

However, in recent years, various spinning methods such as false twist spinning and open-end spinning have been developed, and the spinning speed has increased to 100 m/min.
As mentioned above, if the fiber bundle is continued to be supplied even after yarn breakage as described above, not only will the amount of waste be generated, but if the waste fibers are not disposed of satisfactorily, they will wrap around the mechanical equipment rotating at high speed, causing damage to the equipment. Therefore, there has been a demand for a device that can quickly stop the supply of fiber bundles in the event of an abnormality such as thread breakage, and can smoothly restart the supply of fiber bundles even when restarted.

As a means to solve the above technical problem, it was already published in Japanese Unexamined Patent Publication No. 5
Specific devices have been proposed in Japanese Patent Publication No. 2-1142, Japanese Patent Publication No. 49-41487, and Japanese Patent Publication No. 40-21487.

However, the device proposed in Japanese Patent Application Laid-Open No. 521142 has a structure in which the back bottom roller, which is the driving roller of the back roller, is driven and stopped for each weight from a line shaft via a clutch, which makes the device complicated. The disadvantage is that it is expensive.

In addition, the device disclosed in Japanese Patent Publication No. 4941487 moves the top back roller, which is driven and rotated by frictional contact, onto the roving presser provided between the draft aprons on the downstream side of the back roller when the thread breaks. The roving is held between the top back roller and the roving holding piece.

However, with such a structure, the distance between the nip point of the back roller and the nip point between the roller or draft apron provided downstream of the back roller is usually set to the maximum fiber length of the supplied fiber bundle plus several mm. ing.

Therefore, the distance between the nip point between the roving holding piece and the top back roller and the nip point of the roller or apron provided downstream of the back roller is shorter than the maximum fiber length of the fiber bundle to be supplied. Plain paper doesn't pull out well.

Therefore, some of the single fibers in the supplied fiber bundle are stretched, causing damage to the surface of the roller or apron or causing the fibers to wrap around the roller.

Furthermore, we have developed a mechanism that not only lifts the top back roller, which is in contact with the bottom roller under a high load of 10 kg or more per spindle, but also moves it in the direction of the converting roller located downstream. The device has a complicated structure and is expensive.

The purpose of the present invention is to improve the above-mentioned drawbacks of the conventional technology, and to have a simple structure and a function for automatically stopping and restarting the supply of fiber bundles, which can be applied to fiber bundles with short fiber lengths such as rice noodles. The purpose of this invention is to provide a new spinning device.

The present invention consists of the following configuration to achieve the above object.

That is, in a spinning device including a draft mechanism including a group of fiber bundle supply rollers consisting of a bottom roller that actively rotates and a top roller that rotates in pressure contact with this roller, the top roller is a fiber bundle provided in the spinning device. The roller is provided so that it can press into contact with and separate from the actively rotating bottom roller in response to a signal from a detector that detects an abnormality, and further separates from the top roller in conjunction with the pressurized contact and separation. , a nip piece that comes into pressure contact is provided, the nip piece is brought into pressure contact with the top roller surface on the fiber bundle supply side than the nip point between the top roller and the bottom roller to form a nip point N1, and the top roller and a nip point N1 between the fiber bundle supply roller group and the nip piece and a nip point N2 of the roller group or apron following the fiber bundle supply roller group are set to be larger than the maximum fiber length of the fiber bundle. It is.

The present invention will be explained in more detail with reference to the drawings.

FIG. 1 is a side view showing an embodiment in which a device according to the present invention is applied to a binding spinning machine.

2 is an enlarged view of the vicinity of the back roller in FIG. 1, and FIG. 3 is a view taken along the Z-Z arrow in FIG. 2.

FIG. 4 is a side view for explaining the operation of the top back roller and nip piece shown in FIG. 2.

In FIG. 1, the fiber bundle 2 pulled out from the Shinomaki 1 is supplied to back rollers 5, 5' of a four-wire roller draft mechanism A through a fixed guide 3 and a trumpet guide 4, and then to a third roller 6, 6'. , a second roller 7.7' around which aprons 7A, 7A' are wound, respectively, and front rollers 8, 8', around which aprons 8A, 8A', which are arranged so that their downstream ends are open, are wound at a predetermined magnification. It is drafted into a fleece-like fiber bundle and sent out.

This fleece-like fiber bundle is then transferred to a suction tube 9
A false twist is applied by a false twisting mechanism B consisting of a false twisting nozzle 10 and a bundled spun yarn 11 is formed by passing through the false twisting mechanism B.

The bundled spun yarn 11 obtained by passing through the false twisting mechanism B as described above is pulled out from the take-up roller 12, comes into contact with the yarn breakage detector 13, which is a type of detector for detecting abnormalities in the fiber bundle, and then is wound up. It is wound up into a package 14 by mechanism C.

Compressed fluid is supplied to the false twisting nozzle 10 of the false twisting mechanism B described above.

Compressed air is normally used as this compressed fluid, and in this embodiment, it is supplied to the false twist nozzle 10 from a compressed air pipe 15 through a tube 17.

A solenoid valve 16 is disposed between the compressed air pipe 15 and the false twisting nozzle 10, and this solenoid valve 16 is activated by a signal from the thread cut detector 13 described above, and when the thread cut detector receives a signal indicating no thread cut. The operation of the electromagnetic valve is set so that when the yarn is being outputted, compressed air is supplied to the false twisting nozzle 10, and when a signal indicating the occurrence of yarn breakage is being outputted, the compressed air is not supplied to the false twisting nozzle 10.

A hole (not shown) provided in the side wall of the suction tube 9 is connected to the pneumatic duct 18 via a communication pipe 18', and in this suction tube, the free ends of the fibers in the heated area are aligned in a direction perpendicular to the yarn axis. At the same time, at the time of thread breakage, the fleece-like fiber bundle supplied from the draft mechanism B is sucked.

This part corresponds to the pneuma fill in a normal ring spinning machine.

As shown in FIGS. 2 to 4, the bottom back roller 5 is pivotally supported on a slide metal 21 that is slidably attached to a roller stand 20, and as shown in FIG. 3, it extends in the longitudinal direction of the machine. , and connected to a drive source provided at a gear end (not shown).

On the other hand, the totsubu back roller 5' is rotatably supported on one arm 23A of an L-shaped first swing arm 23 that is swingably provided around a fulcrum shaft 22 fixed to a slide metal 21. ing.

Furthermore, another L-shaped second swing arm 24 is provided to be swingable around the fulcrum shaft 22, and one arm 2
A U-shaped slit 24C is provided at the tip of 4B, and a retaining bar 24D is fixed at the center.

On the other hand, a springback air cylinder 25 is integrally attached to the slide metal 21 via a bracket 26.

A retaining pin 25B is fixed to the tip of a rod 25A that is directly connected to a piston provided in the air cylinder 25.
The pin is the slit (24) of the second swing arm 24 described above.
It is engaged with C.

The compressed air supplied to the air cylinder 25 is supplied from the compressed air piping 15' through a solenoid valve 16' which is activated by a signal from the thread breakage detector 13.
and is supplied via tube 19.

Supply and stop of compressed air to the air cylinder 25 are performed as follows.

When normal spinning is being performed with the thread breakage detector 13 outputting a signal indicating no thread breakage, compressed air is supplied to the air cylinder 25, and the thread breakage detector 13 is issuing a signal that thread breakage has occurred. In this case, the solenoid valve 16' should be adjusted so that it is not supplied.

When compressed air acts on the air cylinder 25, the air cylinder 2
The rod 25A directly connected to the piston of No. 5 moves to the right by the force of compressed air, and urges the second swinging arm 24 to rotate counterclockwise about the fulcrum shaft 22 as shown in FIG. ing.

For this reason, the engagement bar 2 fixed to the second swing arm 24
4D pushes the tip of the other arm 23B of the first swing arm 23 that supports the top back roller 5'.

Therefore, the top back roller 5' is the bottom top roller 5'.
The top back roller 5' is rotated by the frictional engagement caused by the pressurized contact between the two.

Furthermore, an L-shaped nip piece 27 having a portion parallel to the axis of the top back roller 5' is fixed to the tip of the other arm 24A of the second swing arm 24. There is.

As shown in FIG. 2, when the fiber bundle 2 is normally supplied and the spinning device is operating normally, this nip piece 27 is located at a position away from the fiber bundle 2 and does not interfere with the movement of the fiber bundle 2. It is in.

Next, the operation of the top back roller when thread breaks will be explained.

When a thread breakage occurs, a thread breakage detector 13 detects the thread breakage and issues a thread breakage signal.

This signal closes the solenoid valve 16'.

As a result, the compressed air in the air cylinder 25 is released into the solenoid valve 16'.
released into the atmosphere from the exhaust port.

Therefore, the rod 25A is pulled into the cylinder by the force of a compression coil spring (not shown) built into the air cylinder 25, and the second swing arm 24, which is engaged with the retaining pin 25B, becomes the fulcrum. It rotates clockwise around the shaft 22.

On the other hand, the first roller to which the top back roller 5' is attached
One arm 23B of the swinging arm 23 was urged to rotate counterclockwise by the engagement lever 24D provided on the second swinging arm 24, but since it was released from this force, the first arm 23B One end of the swinging arm 23 is fixed to the fulcrum shaft 22, and the other end is hung on a pin 23C provided at the center of the arm 23A of the first swinging arm 23. Then, the swinging arm 23 rotates clockwise around the fulcrum shaft 22 by the force of the wire spring 28. It can be rotated in the direction.

Then, the positioning pin 23D fixed to the arm 23B of the first swing arm 23 comes into contact with the stopper 29 fixed to the tip of the fulcrum shaft 22 and stops, and the bottom back roller 5 and top back roller 5' are separated.

On the other hand, the fiber bundle 2 being supplied to the spinning device is gripped at the nip point N1 where the top bag roller 5' and the nip piece 27 are in contact with each other by the rotation of the first swing arm 23 as described above.

This gripping force is provided by the force of a compression coil spring (not shown) inside the air cylinder 25.

The distance between the nip point N1 and the nip point N2 of the third roller 6.6' is slightly larger than the maximum fiber length of the fiber bundle 2 to be supplied.

For this reason, as a result of the fiber bundle 2 gripped at the nip point N1 being pulled by the third roller 6.6' that continues to rotate,
The blank is cut into a shape, and the cut end 2' is held on a plate or a container 30 placed between the bottom back roller 5 and the bottom third roller 6, so that even if the part downstream from the third roller is rotating, The supply of the fiber bundle downstream from the third roller is automatically stopped, and even if the bottom back roller 5 continues to rotate, the fiber bundle 2 is not sent.

Next, when resupplying the fiber bundle 2, the yarn breakage detector 13 shown in FIG.
5 and the false twisting nozzle 10, the rod 25A provided in the air cylinder 25 moves to the right again, returning from the state shown in FIG. 4 to the state shown in FIG. 2, and the fiber bundle 2 is re-twisted. Supplied.

This re-supplied fiber bundle 2 is bitten into the third roller 6.6' and then passed to the draft aprons 7A, 7A', but in order to ensure this, the bottom third roller 6 and the hoop It is preferable to provide a plate or a container 31 between the draft aprons 7A.

Further, in the case of a fiber bundle containing fibers made of a material that easily wraps around the top third roller (rubber coated) 6', it is preferable to blow a small amount of air from the air pipe 32 onto the surface of the top third roller 6'.

In the above embodiment, a springback type air cylinder is used, but the force of the air may be used to move the rod in both directions.

In this case, the structure of the solenoid valve 16' is modified to suit this operation.

In addition, compressed air piping 15.15' and solenoid valve 16.16'
It is also possible to share one of each.

In this case, piping to the air cylinder 25 is provided as a tube 19' as shown in FIG.

Furthermore, although the draft mechanism A is of a four-wire roller type, other known mechanisms such as a three-wire roller type without a third roller and a hole directly from the back roller to the draft apron may be used.

Further, instead of the thread breakage detector, a thickness unevenness detector or the like may be used to stop the supply of the fiber bundle.

The present invention can also be applied to spinning machines other than spinning machines, such as roving frames and bobbiners.

Since the present invention has the above-mentioned configuration, it has the following excellent effects.

First, the bottom back roller and top back roller of the draft mechanism are configured to press into contact with each other in response to a signal from a detector that detects an abnormality in the fiber bundle, so that they can freely separate, and in conjunction with this movement, the top back roller and the nip piece are separated and applied. Since pressure contact is possible, the device can have an extremely simple structure and can be operated reliably.

Further, the nip piece is pressed into contact with the top roller surface on the fiber bundle supply side than the nip point between the top roller and the bottom roller to form a nip point N1, and the nip point N between the top roller and the nip piece is formed. Since the distance between the nip point N2 of the roller group or apron following the top roller, B) and uneven roller is set to be greater than the maximum fiber length of the fiber bundle, the fiber bundle can be reliably cut into a blank strip by pulling it out. It will be done,
Since there are no fibers that span both nip points, it exhibits the excellent effect of not causing unnecessary damage to the rollers or apron of the drafting device.

[Brief explanation of the drawing]

FIG. 1 is a side view showing an embodiment in which a device according to the present invention is applied to a binding spinning machine. 2 is an enlarged view of the vicinity of the back roller in FIG. 1, and FIG. 3 is a view taken along the Z-Z arrow in FIG. 2. FIG. 4 is a side view for explaining the operation of the top back roller and nip piece shown in FIG. 2. A: Nidraft mechanism, B: False twisting mechanism, C: Winding mechanism, 1:
Shinomaki, 2: Fiber bundle, 3: Fixed guide, 4 Nidrapet guide, 5: Bottom back roller, 5' Nidobutsubutsu crawler, 6.6': Third roller, 7.7': Second roller, 7A, 7A ': Apron, 8, 8': Front roller, 8A, 8A': Apron, 9: Suction tube, 10: False twist 7 nozzle, 11: Bundled spun yarn, 12:
Take-up roller, 13: Thread cutter detector, 14: Package, 1
5゜15': Compressed air piping, 16.16': Solenoid valve, 17:
Tube, 18: Pneumatic duct, 18': Communication pipe, 1
9.19': Tube, 20: Roller stand, 21 Ni-Ride metal, 22: Fulcrum shaft, 23: First swing arm, 24: Second swing arm, 25: Air cylinder,
26: Bracket, 27: Nip piece, 28: Spiral spring,
29: Stopper, 30° 31 nibrate, 32: Air pipe.

Claims (1)

[Scope of utility model registration request] In a spinning device consisting of a draft mechanism including a fiber bundle supply roller group consisting of a bottom roller that actively rotates and a top roller that rotates in pressure contact with this roller, the top roller detects an abnormality in the fiber bundle installed in the spinning device. It is provided so that it can press into contact with and separate from the bottom roller that actively rotates through a signal from a detector that detects the pressure, and further, it can separate and apply pressure to the top roller in conjunction with the pressurized contact and separation. A nip piece that comes into pressure contact is provided, and the nip piece is brought into pressure contact with the top roller surface on the fiber bundle supply side than the nip point between the top roller and the bottom roller to form a nip point N1, and the nip point N1 is formed. and a nip point N2 of a roller group or apron following the fiber bundle supply roller group is set to be larger than a maximum fiber length of the fiber bundle.