JP2000119923A - Yarn heat treatment apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide the subject apparatus constructed as a compact short heater and so designed as to set up a means for jetting compressed air, when yarn is broken, so that the yarn goes apart from yarn guides to prevent the yarn from fusing on the yarn guides. SOLUTION: This yarn heat treatment apparatus having yarn guides 27 in the heating space 26 of a non-contact type heater is so designed as to set up a means 28 for jetting compressed air, when yarn 3 is broken, so that the yarn 3 goes apart from the yarn guides 27; wherein it is preferable that the means 28 is set up in the heating space 26 and actuated by a yarn breakage detector set up between a 1st feed roller and a 2nd feed roller.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to, for example, a yarn drawn out from a yarn supply package, drawn and false twisted, is used as a first yarn.
While being heated by the heater device, it is cooled by a cooling plate (also called a "balloon plate" because it also has a function of suppressing ballooning of the yarn), and then the yarn is heated again by the second heater device to reduce the torque. The present invention relates to a yarn heat treatment device such as a first heater device in a draw false twisting machine that is reduced and then wound into a package via an oiling member or the like. The second heater device may be omitted in some cases, but in this case, the heater device is only the first heater device.

[0002]

2. Description of the Related Art Conventionally, a non-contact high-temperature heater has been known as a yarn heat treatment device such as a first heater device of a draw false twisting machine. If the stopped yarn is present in the heating space of the first heater device, the cut yarn comes into contact with the yarn guide provided in the first heater device and is melted and adhered to the yarn guide, so that the yarn travels. Even if you try to resume,
A trouble occurs in which the melt comes into contact with the melt adhered to the yarn guide and cuts again. In order to solve such a problem, a temperature setting that avoids the temperature at which yarn processing cannot be resumed for a long time due to the melting described above, or a heating coil is incorporated in the yarn guide itself, and the fused yarn is fired and carbonized. And
Self-cleaning, or always,
The yarn guide held by the electromagnet is released from the suction by the electromagnetic magnet when the yarn is cut, and the yarn is discharged from the first heater device. Heat treatment apparatuses are known (JP-A-3-234834, JP-A-3-17447, etc.).

[0003]

In the yarn heat treatment device such as the first heater device of the above-described conventional draw false twisting machine, the temperature is set so as to avoid the temperature at which the yarn processing cannot be resumed for a long time due to melting. If you do, of course,
There is a problem that the processing temperature of the yarn is limited.In addition, when a heating coil is incorporated in the yarn guide itself to burn and carbonize the welded yarn, the shape of the yarn guide is limited only. No, the thread guide becomes expensive,
There is a problem that the production cost of the draw false twisting machine and the like is increased, and the cost of the manufactured yarn is increased. Further, the yarn lifting guide, which is normally held by the electromagnet, releases the suction from the electromagnet when the yarn is cut, and discharges the yarn from the first heater device. In this state, the electromagnet must always be operated, which wastes energy and takes a certain amount of time to operate the yarn lifting guide having an appropriate length and weight. There is a problem that the yarn is welded to the guide.

[0004] An object of the present invention is to solve the problems of the yarn heat treatment apparatus such as the first heater apparatus of the above-mentioned conventional draw false twisting machine and to provide a yarn heat treatment apparatus which can be configured as a compact short heater. Is to do.

[0005]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention firstly provides a yarn heat treatment apparatus having a yarn guide in a heating space of a non-contact type heater. A means for injecting compressed air in a direction in which the yarn separates from the yarn guide when the yarn is cut,
In the heating space, means for injecting the compressed air is disposed. In the third, the means for injecting the compressed air is provided between the first feed roller and the second feed roller. This is operated by a thread cutting detecting device provided.

Hereinafter, the yarn heat treatment apparatus of the present invention will be described by taking the first heater apparatus of the draw false twisting machine as an example. However, the present invention is not limited to this embodiment unless it exceeds the gist of the present invention. Absent.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS First, the running of a yarn in a draw false twisting machine as an example to which the yarn heat treatment apparatus of the present invention is applied will be described with reference to FIG.

[0008] Reference numeral 1 denotes a creel stand. The yarn 3 pulled out from the yarn supply package 2 supported by the creel stand 1 is introduced into a first feed roller 5 through an appropriate guide 4. Thereafter, the yarn 3 is inserted into the first heater device H1 while being guided by appropriate guides 6 and 7 disposed on the yarn introduction side of the first heater device H1. The yarn 3 that has exited the first heater device H1 enters the cooling plate 8, is then twisted by the false twisting member 9, and is then introduced into the second feed roller 11 via a suitable guide 10.
The yarn 3 coming out of the second feed roller 11 is supplied to the second heater device H2, the guide 12, the third feed roller 13,
Oiling roller and guide 14, not shown,
After 15, it is taken up by a take-up package 16.

Next, mainly referring to FIGS. 2 and 3,
The first heater device H1 will be described.

Reference numeral 17 denotes a sheath heater disposed in a substantially prismatic heater block 18 made of a metal having good heat conductivity such as brass. The heater block 18 has a cross section perpendicular to the length direction. The shape is formed in a vertically long rectangle, and in this embodiment, the heater block 18 is used.
Inside, there are two sheathed heaters 17 along the length direction.
Are arranged side by side in the vertical direction.

Reference numeral 19 denotes a horizontal heat insulating portion made of a plate-like heat insulating material disposed on the upper surface of the heater block 18;
Is a side heat insulating portion made of a plate-like heat insulating material disposed along both side surfaces in the longitudinal direction of the heater block 18, and 21 is a side heat insulating member extending downward from the lower surface of the heater block 18. This is an intermediate heat insulating portion made of a plate-like heat insulating material and arranged substantially parallel to the portion 20. The lower surface 20a of the side heat insulating portion 20 and the lower surface 21a of the intermediate heat insulating portion 21 are configured to be substantially flush. The heater block 18 in which the sheathed heater 17 is incorporated, and the horizontal heat insulating portion 19, the side heat insulating portion 20, and the intermediate heat insulating portion 21 disposed around the heater block 18 are all inner cases having a substantially U-shaped cross section. 22.

Reference numeral 23 denotes a horizontal heat insulating portion 19 and a side heat insulating portion 2.
The outer heat insulating part 23 is disposed so as to surround the outer case 0. The outer heat insulating part 23 is accommodated in an appropriate outer case 24. The outer case 24 is provided on the lower surface 20 of the side heat insulating portion 20.
a and the lower side surface of the side heat insulating part 20 on the side of the intermediate heat insulating part 21. 25 is a cover that covers the lower part of the intermediate heat insulating part 21.

26 is a side heat insulating portion 20 and an intermediate heat insulating portion 21
2, in the present embodiment, as shown in FIG. 2, the side heat insulating portion 20 located on the left side, the intermediate heat insulating portion 21 and the right side are located on the right side. Two slit-shaped heating spaces 26 are formed by the side heat insulating portion 20 and the intermediate heat insulating portion 21. In addition, by forming the cross-sectional shape perpendicular to the length direction of the heating space 26 into a substantially inverted trapezoidal shape tapered toward the yarn insertion port 26a of the heating space 26, In addition, the heat radiation of the air in the heating space 26 heated by the heater block 18 in which the sheathed heater 17 is incorporated can be effectively suppressed.

A yarn guide 27 is disposed in the heating space 26 on the side of the heater block 18.
An appropriate number of them are arranged at predetermined intervals along the length direction of 6. As shown in FIG. 3, the yarn guide 27 is
The heating space 26 is arranged in a downwardly curved shape along the length direction. The yarn guide 27 is formed in a substantially drum shape from ceramics or the like having excellent wear resistance, and has a guide groove 27a formed on a peripheral surface with which the yarn 3 is engaged and guided. Reference numeral 27b denotes a horizontal shaft formed on the side surface of the yarn guide 27. The horizontal shaft 27b is fitted into a hole formed in the side heat insulating portion 20 so that the yarn guide 27 is At a predetermined interval, an appropriate number is provided at 20. As shown in FIGS. 2 and 3, the yarn 3 is
It is configured to be guided by. A not-shown plate-shaped yarn guide member having a pair of slits, not shown, formed in correspondence with the heating space 26 is attached to the yarn introduction side and the yarn lead-out side of the first heater device H1. ing.

Numeral 28 is provided in a space formed between the yarn guide 27 and the horizontal heat insulating portion 19 along the length direction of the heating space 26 over substantially the entire length of the heating space 26. The compressed air supply pipe is provided above the yarn 3 guided by the yarn guide 27. One end of the compressed air supply pipe 28 is closed, and a connection pipe 30 connected to a compressed air supply source (not shown) via an electromagnetic valve 29 is connected to the open end. Also,
The compressed air supply pipe 28 located in the heating space 26 has an air ejection hole 2 for ejecting compressed air downward.
8a are provided in a suitable number at predetermined intervals.

Reference numeral 31 denotes a first heater device H as an example.
This is a yarn break detection device disposed between the first and the cooling plate 8, and various yarn break detection devices such as a mechanical type and a photoelectric type can be applied as the yarn break detection device 31. When the yarn cutting detecting device 31 detects the cutting of the yarn 3, as shown in the block diagram of FIG. The solenoid valve 29 is opened to supply compressed air to a compressed air supply pipe 28 disposed above the yarn 3 guided by the yarn guide 27, and the compressed air is supplied from an air ejection hole 28 a of the compressed air supply pipe 28. Compressed air is ejected downward, and the yarn 3 guided so as to be in contact with the lower surface of the yarn guide 27 is separated from the yarn guide 27, and the yarn 3 separated from the yarn guide 27 is inserted into the heating space 26. It will fall from the mouth 26a.

When the yarn cutting detecting device 31 detects that the yarn 3 has been cut, a timer 33
Operates for a predetermined time, and when the timer 33 expires,
The supply of the compressed air to the compressed air supply pipe 28 is stopped by closing the solenoid valve 29. The supply time of the compressed air to the compressed air supply pipe 28 controlled by the timer 33 may be, for example, about 0.1 to 0.5 seconds, and the injection of the compressed air from the air ejection hole 28a instantaneously makes the yarn The yarn 3 separated from the guide 27 is
Even if the ejection of the compressed air from a is stopped, the compressed air drops from the yarn insertion port 26a of the heating space 26 by its own weight.

In the embodiment shown in FIG. 5, instead of arranging the compressed air supply pipe 28 in the space formed between the yarn guide 27 and the horizontal heat insulating portion 19, the outer heat insulating portion 2 is provided.
3 and a vertical pipe 34 penetrating the horizontal heat insulating part 19 and the like,
Along the longitudinal direction of the first heater device H1, an appropriate number of... Is set so that the tip end thereof is located above the yarn 3 guided so as to contact the lower surface of the yarn guide 27. In addition, the upper end of the vertical pipe 34 is connected by a horizontal pipe 35, and the horizontal pipe 35 is connected to a compressed air supply source (not shown) via the solenoid valve 29, as in the above-described embodiment. Have been. The operation is the same as in the above-described embodiment, and the description of the operation will be omitted.

In the embodiment described above, the first heater device H
Although the example in which the yarn cutting detection device 31 is disposed between the first heater device H1 and the cooling plate 8 is shown in the example shown in FIG. When the yarn 3 is cut between the first feed roller 5 and the second feed roller 11, the cut yarn 3 on the first feed roller 11 side is connected to the first heater. Since it stops in the device H1 and welds to the yarn guide 27, when the yarn 3 is cut between the first feed roller 5 and the second feed roller 11, the yarn 3 is immediately compressed from the air ejection hole 28a. In order to cause the yarn 3 to be instantaneously separated from the yarn guide 27 by injecting air, it is preferable to dispose the yarn break detection device 31 between the first feed roller 5 and the second feed roller 11. Even if the yarn 3 is cut other than between the first feed roller 5 and the second feed roller 11, the yarn 3 is connected between the first feed roller 5 and the second feed roller 11, Therefore, the yarn 3 is transferred to the second feed roller 1
1, the traveling is continued, the traveling of the cut yarn 3 does not stop in the first heater device H1, and the possibility that the cut yarn 3 is welded to the yarn guide 27 is small. .

Also, when the yarn is cut between the appropriate guides 6, 7 disposed on the yarn introduction side of the first heater device H1 and the first feed roller 5, the first heater device H
Since the yarn 3 in 1 is pulled out by the second feed roller 11, the yarn 3 does not melt. On the other hand, between the outlet of the first heater device H1 and the second feed roller 11,
When a yarn break occurs, the yarn 3 is placed in the first heater device H1.
Is left, and therefore, the yarn 3 is melted. Therefore, it is optimal to provide the yarn break detection device 31 during this time, that is, between the outlet of the first heater device H1 and the second feed roller 11. is there.

In the above-described embodiment, an example is shown in which when the yarn 3 is cut, compressed air is injected into the yarn 3 in the heating space 26 of the first heater device H1. Instead of injecting compressed air to the yarn 3 in the heating space 26 of the first heater device H1, the first heater device H
1, a compressed air supply pipe 28 provided with an air ejection hole 28a is provided near the entrance of the first heater device H1.
The yarn 3 to the yarn 3 located near the entrance of the
7 may be configured to inject compressed air so as to be separated therefrom. As in the present embodiment, when a plurality of heating spaces 26 are formed in the first heater device H1 and a plurality of yarns 3 are inserted through the first heater device H1, one of the yarns 3 is cut. , The cut yarn 3
When the compressed air is injected near the entrance of the heater device H1, the compressed air is injected to the uncut yarn 3, which adversely affects the heat treatment of the uncut yarn 3. , The first heater device H1
When a plurality of yarns 3 are inserted into the first heater device H1, it is preferable to inject compressed air to the yarns 3 in the heating space 26 of the first heater device H1. In addition, depending on the position of the air pipe, the yarn 3 is pulled using the air suction force.
It is also possible to separate from the yarn guide 27.

As described above, when the yarn 3 is cut, the means for injecting compressed air in the direction in which the yarn 3 separates from the yarn guide 27 is provided, so that the yarn 3 is separated from the yarn guide 27 instantaneously. The welding of the yarn 3 to the yarn guide 27 can be prevented.

When the yarn 3 is cut, the yarn 3 is instantaneously separated from the yarn guide 27.
The welding of the yarn 3 to the yarn guide 27 can be prevented.
The temperature of the heater device H1 can be set.

A heating coil is built in the yarn guide itself,
Without using a complicated structure such as firing and carbonizing the welded yarn, when the yarn 3 is cut, a simple structure in which a yarn separating means for instantly separating the yarn 3 from the yarn guide 27 is provided. Thus, the welding of the yarn 3 to the yarn guide 27 can be prevented.

Since the means for injecting the compressed air is disposed in the heating space 26, when a plurality of yarns 3 are inserted through the first heater device H1, the heat treatment of the uncut yarns 3 is adversely affected. Never give.

Since the yarn breakage detecting device 31 is disposed between the first feed roller 5 and the second feed roller 11, the first feed roller 5 and the second feed roller 1
When the yarn 3 is cut between the air ejection holes 2 and
8a, the yarn 3 can be instantaneously separated from the yarn guide 27 by injecting compressed air from the yarn guide 2a.
7 can be reliably prevented from being welded.

Further, the yarn guide, which is sucked and held by the electromagnet as described above, is released from the suction by the electromagnetic magnet when the yarn is cut, and the yarn is discharged from the first heater device. In the case of using the compressed air as in the present invention, the response is fast, and therefore, the yarn 3 is moved to the first position.
It can be discharged instantaneously from the heater device H1.

Further, since the yarn guide sucked and held by the electromagnet is provided in the first heater device, the yarn guide is heated, so that the yarn 3 comes into contact with the yarn guide. May melt.

The yarn guide sucked and held by the electromagnet as described above is released from the suction by the electromagnetic magnet when the yarn is cut, and the yarn is discharged from the first heater device. According to the present invention, the mechanism for discharging the yarn 3 from the first heater device H1 is simple, and therefore, there is almost no need for adjustment and maintenance of the discharge mechanism, and the maintenance cost is low.

As described above, the yarn guide sucked and held by the electromagnet is released from the first heater device by releasing the suction held by the electromagnetic magnet when the yarn is cut. After discharging the yarn from the heater device,
Although the return operation of the thread guide is necessary, such a return operation using compressed air as in the present invention does not require such a return operation. Therefore, there is no mechanism for the return operation and the structure is simple. Work time for the return work can be omitted, and work efficiency is improved.

As described above, when the yarn guide sucked and held by the electromagnet is released from the first heater device by releasing the suction held by the electromagnetic magnet at the time of cutting the yarn, the yarn is discharged from the first heater device. At normal times, such as a non-cut stretch false twisting machine, the electromagnet must always be excited, and therefore has a mechanism against energy savings. Since only power consumption is required for a short time only when the yarn is cut, energy saving can be realized. The compressed air supply source used in a false twisting machine or the like at the time of threading can be used, and there is no need to install a new compressed air supply source. There is.

[0032]

Since the present invention is configured as described above, the following effects can be obtained.

Since a means for injecting compressed air in a direction in which the yarn separates from the yarn guide when the yarn is cut is provided, the yarn can be instantaneously separated from the yarn guide when the yarn is cut. Therefore, welding of the yarn to the yarn guide can be prevented.

Since the means for injecting compressed air is provided in the heating space, when a plurality of yarns are inserted through the first heater device, compressed air is injected into uncut yarns. And therefore does not adversely affect the heat treatment of the uncut yarn.

Since the yarn break detecting device is provided between the first feed roller and the second feed roller, welding of the cut yarn to the yarn guide can be reliably prevented.

[Brief description of the drawings]

FIG. 1 is a schematic side view of a draw false twisting machine as an example to which a yarn heat treatment apparatus of the present invention is applied.

FIG. 2 is a cross-sectional view perpendicular to the length direction of a first heater device as an example of a yarn heat treatment device of the present invention.

FIG. 3 is a longitudinal sectional view of an inside of an inner case of a first heater device as an example of a yarn heat treatment device of the present invention.

FIG. 4 is a block diagram as an example of a yarn heat treatment apparatus of the present invention.

FIG. 5 is a longitudinal sectional view of a main part of a first heater device according to another embodiment as an example of the yarn heat treatment device of the present invention.

[Explanation of symbols]

 H1... First heater H2... Second heater 3... Thread 17... Sheathed heater 18. ····· Heater block 19 ······ Horizontal insulation part 20 ····· Side insulation part 21 ····· Intermediate insulation part 23 ···· ·············· Heating space 27 ········ Thread guide 28 ······ Compressed air supply pipe

Claims (3)

[Claims] In a heat treatment apparatus for a yarn having a yarn guide in a heating space of a non-contact type heater, means for injecting compressed air in a direction in which the yarn separates from the yarn guide when the yarn is cut is provided. A heat treatment device for a yarn, wherein the heat treatment device is provided. 2. The yarn heat treatment apparatus according to claim 1, wherein means for injecting the compressed air is provided in the heating space. 3. The apparatus according to claim 1, wherein the means for injecting the compressed air is operated by a yarn breakage detecting device provided between the first feed roller and the second feed roller. 3. The yarn heat treatment apparatus according to claim 1.