JPS601407B2 - Spun yarn manufacturing equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a method of forming a continuous spun yarn by applying a binder to a fiber east made of staples, so that the surface fibers of short fibers constituting the fiber east are wound around a central fiber east. The present invention relates to an improvement in a spun yarn manufacturing apparatus for forming a spun yarn.

BACKGROUND OF THE INVENTION Spinning apparatuses using fluid nozzles are known from the past.

In addition, in this spinning device, an apron device is used as the fiber supply device, the downstream end of the apron device is configured to be openable, and a spinning device is also used in which a suction member is used between the fiber supply device and the temporary nozzle. It is publicly known. However, when obtaining spun yarn using the above-mentioned spinning device, special measures are required when starting the paper if the length of the staples forming the supplied fibers is approximately 4 lengths or less. . In other words, if the distance between the nip point of the fiber supply device in the spinning device and the twisting point of the fluid twisting nozzle (the point where the swirling fluid flow acts on the yarn material) is longer than the fiber length, the fiber east will be cut and the fiber will remain as it is. In this case, yarn cannot be formed at the beginning of the grade. Therefore, it is necessary to use a seed yarn or to make the distance between the nip point and the twisting point shorter than the fiber length of the supplied fiber. If a seed yarn is used, the thread must be removed before using the manufactured yarn.

Therefore, this method has the disadvantage that, in the event of thread breakage, a troublesome operation must be performed. On the other hand, in order to make the distance between the nip point and the heating point variable in the above-mentioned spinning device, the present inventors adopted an apron in the feeding device, and a structure in which the midstream and downstream portions of the apron can be brought into close contact with each other and separated from each other. However, even though the fiber length of the fiber east is short, sufficient results have not been obtained with this structure alone for the operation of starting the assembly.

In addition, the present inventors have developed a device with a structure in which the fluid temporary nozzle slides inside the suction device and moves the fluid temporary nozzle toward and away from the fiber supply device. If the length is too short, there is a problem in smoothly performing the spinning start operation. The purpose of the present invention is to solve the technical problems that could not be solved with the conventional techniques as described above, and to provide a new spinning device that is extremely easy to operate at the beginning of forming a pattern and that produces a uniform quality of spun yarn. This is what we intend to provide. The present invention has the following configuration to achieve the above object.

That is, a fiber east supply device that supplies staple fiber east using a pressure nip, a suction device, and a fluid storage device are arranged in series in this order, and the staple fiber east supplied from the fiber east supply device is arranged in series in this order. In a spun yarn manufacturing apparatus in which constituent fibers are formed into a continuous yarn by winding surface fibers around a substantially untwisted central fiber east using a fluid false twisting device, the fiber east supplying device is equipped with a mechanism that allows the fiber east nip to be brought into close contact with and separated from each other in its midstream and downstream portions, and the fluid false twisting device is provided with a mechanism that allows the device to be brought close to and separated from the downstream portion of the fiber east supply device.
It is characterized by having a mechanism that allows it to freely move away, and that the former mechanism that allows it to come into close contact and move away freely, and the latter mechanism that allows it to approach and move away freely, are configured to move in relation to each other. This is a spun yarn manufacturing device.

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

FIG. 1 is a schematic diagram for explaining a process for producing spun yarn using an apparatus according to the present invention.

In FIG. 1, a fiber east 1 made of twine or sliver is drafted to a predetermined size by an ordinary drafting device 2, and sent to a fiber east supply device consisting of an apron device A.

Aprons 6, 6' are wrapped around between the front rollers 3, 3' of the apron device A and the downstream support rollers 4, 4' via tension rollers 5, 5'. are configured such that they can be joined and separated from each other freely by the movement of rollers 4, 4' and 5, 5'.
A fluid temporary nozzle 8 is provided downstream of the apron device. A yarn Y is formed as a result of adding a fork to the fibers supplied from the draft device 2 to a fluid fork nozzle 8 via a fiber supply device A, and this yarn Y passes through a take-up device 14 to a winding device 16 It is wound up. In the above process, when the yarn is normally being fed out, the aprons 6, 6' are joined by the front rollers 3, 3' and maintain a nip state, and the parts in contact with the rollers 4, 4' are mutually kept in a state of isolation. Therefore, the fork applied by the fork nozzle 8 to the fibers supplied by the fiber supply device is transmitted to the nip point formed by the front rollers 3, 3'. In the space between the front rollers 3, 3' and the support rollers 4, 4' of the aprons 6, 6', the fiber east moves as a continuous thread due to the folding. At this time, there are fibers with one or both ends free on the outside of the fibers forming the center of the yarn. This staple fiber, which is free at both ends or at one end, is connected to a pneumatic fan (not shown) which is a negative pressure generating device.
The fibers are sucked into the suction member 7 connected through the connecting pipe 9 and attached to the surface of the tented fibers in a weakly restrained state almost parallel to the yarn axis. A flexible pipe 11 is connected to the fluid temporary nozzle 8 from a pressure pipe 13 via a solenoid valve 12.
Compressed fluid (air) is supplied by. When the fiber east in the above state passes through the twisting point, that is, the compressed fluid injection point of the fluid twisting nozzle 8, it is untwisted and the fiber east in the center becomes substantially untwisted, and the covering fiber is regularly wound around it. A spun yarn Y having a bundled appearance is formed and comes out from the outlet of the fluid temporary nozzle 8. This yarn is wound up by a winding device 16 via a take-up device 14. In Fig. 1, a thread cutter detector 15 is shown.
If the thread breaks, the cutter 17 consisting of a solenoid stops supplying the raw material fiber 1 in response to a signal from the thread breakage detector, and at the same time activates the solenoid valve 12 to stop the fluid supply to the fluid temporary nozzle 8. I showed an example of doing this, but
The yarn breakage treatment method may be similar to that disclosed in Japanese Patent Application No. 51-37820. FIG. 2 is an enlarged side view of the fiber supply device including a pair of aprons, the suction member, and the fluid temporary nozzle portion, which are the main parts of the device according to the present invention. FIG. 3 is a plan view taken along the Z-Z arrow shown in FIG. 2. Further, FIG. 4 is a sectional view showing the structure of the fluid temporary nozzle in detail, and FIG. 5 is a side view for explaining the operation of the apparatus according to the present invention at the time of starting paper output. As shown in FIG. 4, the structure of the fluid temporary nozzle 8 is such that a nozzle core 8B is fitted into a nozzle body 8A, and both are fixed with a set screw.

In the case of the embodiment shown in FIG. 4, the nozzle core 8B has a narrow upstream yarn path 8C and a downstream yarn path consisting of a thick cylindrical portion 8D and a tapered portion 8E. Furthermore, the junction between the upstream yarn guide passage 8C and the part 80 of the downstream yarn guide passage forms a tapered part, and a plurality of fluid injection holes 8F are always provided at the entrance of the passage 8C on the wall surface of the tapered part. In order to have a suction action and a fiber twisting action, it is inclined with respect to the center of the ball and extends in the tangential direction of the thread guide passage. Compressed fluid (air) is supplied to the fluid injection hole 8F through the movable communication pipe 11 (see FIG. 5), the elbow 81, the straight pipe 81, and the annular chamber 8G. On the other hand, as shown in FIGS. 2 to 4, a frame 37 is provided so that the suction member 7 is located downstream of the staple supply device having the aprons 6 and 6'.
It is fixed at chest 7G.

The structure of the suction member 7 is such that a mouth 7B having a bird's-flat funnel shape has an entrance in the width direction of the apron at the upstream end of the body 7A, and a portion following the mouth 7B has a cylindrical fiber passage 7C. Further, a hole 7D connected to a negative pressure generating device is provided in a part of the peripheral wall of the fiber passage 7C, and air is sucked in from the inlet of the mouth 7B to generate a suction air flow in the fiber passage of the suction member. By the way, the nozzle body 8A is fitted into the cavity 7E inside the body 7A of the suction member, and the cylindrical tip 8A' of the nozzle body is fitted into the cylindrical fiber passage 7C of the suction member, so that the fluidizing nozzle 8 The suction member 7 and the suction member 7 are slidably engaged with each other, so that the interior of the suction member 7 can be advanced to bring the temporary nozzle 8 closer to the fiber supply device.

During normal spinning, the fluid temporary nozzle 8 is in a position where it does not block the communication hole 7D of the suction member 7 to the negative pressure generating device, but when the temporary nozzle is brought close to the fiber supply device at the start of weaving, it is placed in a position as shown in FIG. As shown, the communication hole 7 is connected by the outer peripheral surface of the tip 8A' of the nozzle body as indicated by the broken line.
D is closed, the suction airflow generated inside the suction member is temporarily stopped, and the fibers sent from the fiber supply device are guided to the temporary nozzle 8. A compression coil spring 31 is interposed between the suction member 7 and the fluid temporary nozzle 8, and the action of this spring 31 moves the temporary nozzle to the normal position after the start of spinning. Further, in order to perform the above operation smoothly, a straight pipe 81 forming a part of the compressed fluid passage passes through an elongated hole 7F provided in a part of the body 7A of the suction member. Next, a fiber supply device having a pair of aprons as main parts will be explained.

As shown in FIG. 2, the top front roller 3' located at the upstream end is supported by a retainer 19 attached to the weighting arm 18, and the top apron support roller 4' at the downstream end is supported by the retainer 19 attached to the weighting arm 18. There are two brackets that are attached to the support.

Further, a top tension roller 5' is attached to the spiral spring 2 around a fulcrum pin 21 provided in a part of the bracket 20.
The top apron 6' is supported by an arm 22 that swings with the force of 3, and extends over the roller 3' and roller 4'.
make you nervous. On the other hand, the bottom apron 6 has a frame 37
A fulcrum pin 28 provided on a part of the bracket 30 fixed to
The bottom tension roller 5 is tensioned by the bottom tension roller 5 supported by the arm 27 which swings around the center with the force of a spiral spring 29.

Bottom front roller 3 of bottom apron is frame 3
The downstream support roller 4 of the bottom apron is supported by a bearing fixed to the body 7A, and is supported by an arm 25 that swings around a support pin 26 provided on a part of the side surface of the body 7A of the suction member.

At the tip of the arm closer to the front roller, a bottom apron special raising roller 24 is supported inside the bottom apron 6 at a position where it can function as described below. Furthermore, the swing arm 25 is also connected to the downstream side of the fulcrum pin 26 by 25A.
It extends like this, and a pin 25B is fixed to its tip. This pin 25B is fitted into an elongated hole 32C provided in a portion of the lever 32, which is rotatable about a fulcrum pin 33 provided in a bracket 365 extending from the frame 37. Furthermore, the upstream end surface 32A of the lever 32 is in contact with the straight pipe 81 fixed to the fluid temporary nozzle 8, and the downstream end surface 328 is fixed to a part of the body 7A of the suction member with a countersunk screw 35. It is in contact with the eccentric cam 34. The eccentric cam 34 is a stopper and a fluid temporary nozzle for finely adjusting the position of the downstream end support roller 4 of the bottom apron when setting the opening width 6 (see Fig. 6) of the downstream ends of the aprons 6, 6'. It also serves as a stopper for positioning during normal spinning in step 8. The position of the downstream end support roller 4' of the top apron 6' can be adjusted by replacing the spacer 20' between the bracket 20 and the weighting arm 18. In addition, if the downstream end width 6 of the apron is changed, when the aprons come into contact with each other at the downstream ends, the fluid temporary nozzles will come within a distance from the downstream end of the apron to perform the action described below. If necessary, it is preferable to prepare several levers 32 with different positions of the elongated hole 32C relative to the fulcrum pin 33, and to make it possible to replace one selected from these levers as necessary. Next, the positional relationship between the fluid temporary nozzle 8 and the aprons 6, 6' will be explained in normal conditions and at the beginning of paper output.

First, when starting spinning, the lever 32 is rotated counterclockwise about the fulcrum pin 33 shown in FIG. 2 by hand or by an automatic machine.

Then, the upstream end surface 32A of the lever 32 pushes the straight pipe 81 fixed to the fluid temporary nozzle 8, so that the fluid temporary nozzle 8 is pushed into the suction member and approaches the downstream ends of the aprons 6, 6'. On the other hand, the fixed pin 25B, which is engaged with the elongated hole 32C of the lever 32, is pushed down by this movement, so the swinging arm 25 rotates clockwise, and the aprons 6, 6' finally reach the downstream end R. Contact. The operation of the swing arm 25 also moves the bottom apron special raising roller 24, bringing both aprons into strong contact at point Q as well.

In this state, the fibers supplied from the aprons are completely nipped by the pair of aprons, especially at points P, Q, and R, and the feed speed of the fibers is controlled even at the downstream end of the aprons. The speed of the apron is restricted, and while most of the fibers are kept nipped by the apron, they are sucked into the fiber passage of the nozzle by the suction action of the fluid twisting nozzle 8 and twisted, thereby concentrating the constituent fibers together. It is formed into a thread and released from the outlet of the nozzle along with the airflow. After the yarn is released from the nozzle outlet in this way, if the force acting on the lever 32 is released, the force of the spiral springs 29, 23 and the compression coil spring 31 will release the middle and downstream ends of the apron and release the fluid. The position of the spinning nozzle returns from the state shown in FIG. 5 to the normal spinning position shown in FIG. Here, at the start of spinning, feeding of the fiber east may be done after placing the individual devices in the relevant positions as shown in Figure 5, but first feed out the staple fibers in the state as shown in Figure 2. It can also be easily carried out by a method in which the above-mentioned operation is carried out after the fiber is removed by suction toward the negative pressure generator through the hole 7D provided in the wall of the fiber passage 7C of the suction member.

In this case, the movement of the fluid temporary nozzle 8 closes the hole 7D as described above, but the fluid temporary nozzle is activated so that the fibers are successfully sucked into the fluid temporary nozzle 8 and weaving begins. Next, the operation of each part in the process from the start of spinning until the yarn is normally spun is explained in the sixth section.
This will be explained using figures.

The operations necessary for spinning to produce a spun yarn using the apparatus according to the invention have already been described with reference to FIGS. 2 and 5, and these operations will now be described in more detail.

FIG. 6A is a side view showing the relative positions of each part at the start of weaving. In this embodiment, the aprons 6 and 6', which are the main parts of the fiber supply device, cooperate with each other to grasp the fiber east 1' supplied from the draft device (see 2 in FIG. 1) and direct it to the fluid draft nozzle 8. Supplied. At this time, the fluid temporary nozzle 8 is moved to the position closest to the downstream ends of the aprons 6, 6', and as a result, the fluid temporary nozzle 8 is moved from the nip point R at the downstream end of these aprons to the twisting point of the fluid temporary nozzle, that is, the fluid temporary nozzle 8. The distance 1 from the fluid injection hole 8F to the point where the compressed fluid is injected (the twisting point on the most upstream side in the case where the injection holes are arranged across multiple cross sections in the axial direction of the temporary nozzle) is It is configured to be less than or equal to the maximum fiber nearest neighbor value of the fiber east. For this reason, even if one end of some of the fibers 1' sucked into the fluid nozzle reaches the twisting point, the other end is still nipped to the aprons 6, 6', so these The webbing is instantaneously propagated through the fibers to point R, and then the continuously fed fiber east is formed into a continuous thread by the weaving, which is sent out as yarn Y, and spinning begins. Here, the value near the maximum fiber length is a value that is determined experimentally based on the material of the supplied fiber, the staple diagram, the yarn count to be spun, etc., and is close to the maximum fiber length of the supplied fiber. Regarding the value, for fiber bundles made of Skeyakut staples, a value on the average fiber length plus number side is used, and for fiber bundles made of randomly cut staples, a value smaller than the maximum fiber length and larger than the average fiber length is used. Furthermore, the distance 12 from the point R to the nip point Q in the midstream portion of the apron and the distance 13 from the point Q to the nip point P of the front roller are also set to be less than or equal to the value near the maximum length.

Next, as shown in FIG. 5, when the force applied to the lever 32 is released, the nozzle 8 retreats from the downstream end of the apron due to the action of the spring 31 etc. At the same time, the bottom apron 6 moves in a direction to create a space between it and the top apron 6'. Moving.

FIG. 6B is a side view showing this intermediate process. During the process, as shown in FIG. are still touching each other and nipping the staple fibers east. For this reason, the twist imparted by the fluid temporary nozzle 8 propagates from point R to point Q due to the above-mentioned reason,
To maintain the spinning state without yarn breakage. FIG. 6C is a side view showing a normal spinning state. As shown in FIG. 6C, the fluid temporary nozzle 8 and the aprons 6, 6' return to their normal spinning positions (the relative positions in FIG. 2), and the aprons form a wedge-shaped space at the downstream end. By maintaining the regular gap 6 at , the twist imparted to the fiber east is successfully transmitted to the nip point P at the upstream end, and the long twisting region inserts uniform false twist into the yarn, maintaining stable twilling. Ru. A suitable value of 6 is generally between 2 and 5. The present invention is not limited to the above-described embodiments, but can be modified in accordance with the gist of the present invention. For example, the fiber passage of the fluid curving nozzle may have a uniform cross-sectional shape or may have a curved axis. Further, the fluid temporary nozzle may have a structure that generates a suction action intermittently. Furthermore, the interlocking mechanism that interlocks both the mechanism for moving the fluid temporary nozzle and the mechanism for displacing the apron is replaced by a swinging mechanism of a long hole provided in the lever 32 and a fixed pin provided in the swinging arm 25. An exercise device that utilizes electrical or magnetic properties may also be used.

As described above, in the device according to the present invention, the midstream nip point and the downstream nip point of the fiber east supply device can be brought into close contact and separated, respectively, and the nip point of the fiber east supply device and the heating point of the fluid temporary nozzle It has a structure in which the distance between the two parts can be changed, and the movements of the two parts are linked to each other, so that the following excellent effects are achieved.

A First is the niff of the fiber supply device.

By making the distance between the twisting point and the twisting point of the fluid twisting nozzle variable, it is possible to shorten the distance at the beginning of brazing, shorten the fiber length, and reduce the length of fibers (around 2 or less, such as cotton). ), but it can be spun without using seed yarn. B The distance between the twisting points of the fiber supply device and the fluid temporary nozzle in a normal state can be made longer than the value near the maximum length, so the twisting area of the temporary twisting added to the fiber east can be set to an appropriate value. The uniformity of the resulting spun yarn can be improved.

C. Since the movement of the nip point of the fiber supply device and the movement of the fluid temporary nozzle are carried out in conjunction with each other, there is no trouble caused by misalignment of the two operations, and the operation is simple and does not require any skill in handling. .

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram for explaining a process for producing spun yarn using an apparatus according to the present invention. FIG. 2 is a side view of the main parts of the device according to the present invention, and FIG. 3 is a plan view taken along the Z-Z arrow shown in FIG. Fourth
The figure is a sectional view showing the structure of a fluid temporary nozzle. Fifth
The figure is a side view for explaining the operation of the apparatus according to the present invention at the start of spinning. FIG. 6 is a side view showing the relative positions of various parts of the apparatus according to the present invention from spinning to normal paper output, where A is at the start of spinning, B is at the intermediate stage, and C is at normal spinning. The status is shown respectively. 1... Stable Fiber East, A...
...Fiber supply device, 2...Draft device, 3, 3'...
... Apron front roller, 6, 6'... Apron, 7... Suction member, 7B, 7C...
- Fiber passage of suction member, 8...Fluid temporary nozzle, 8A...Nozzle body, 8B...Nozzle core, 8C, 8D, 8E.../Fiber passage of nozzle,
8F...Fluid injection hole of nozzle, 22, 27...
・・・．・Tension loaf support bracket, 23,2
9...Spring spring 24...Special raised member at the center of the bottom apron, 25...Swinging arm, 25B...Pin fixed to swinging arm 25 , 26...Rotation fulcrum of swing arm 25, 31...
...Compression coil spring, 32...Operation lever,
32C...Elongated hole that engages with the pin 25B of the operating lever, 33... Rotation fulcrum of the operating lever, 34...
...Eccentric cam, Y...Bound spun yarn. Figure 1 Figure 2 Figure 3 Figure 4 Figure 5 Figure 6

Claims (1)

[Claims] 1. In a spun yarn manufacturing apparatus in which a fiber bundle supply device supplies staple fiber bundles using a pressure nip, a suction device, and a fluid temporary twisting device are arranged in series in this order, the fiber bundle supply device is arranged in the midstream and A mechanism is provided for allowing the nips of the fiber bundles to come into close contact with and separate from each other in a downstream section, and the fluid temporary twisting device includes a mechanism that allows the device to approach and separate from the downstream section of the fiber bundle supply device. A spun yarn manufacturing apparatus characterized in that the former mechanism that allows close contact and separation and the latter mechanism that allows free approach and separation are configured to interlock with each other.