JP3244052B2 - Spinning method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to a plurality of drafted slivers, each of which is supplied to a separate air jet nozzle to spin out a plurality of single yarns, and the plurality of single yarns are joined to form a combined yarn. The present invention relates to a spinning method for winding the composite yarn.

[0002]

2. Description of the Related Art Conventionally, in a so-called twin yarn spinning machine, single yarns spun by separate air jet nozzles are combined and combined, and are arranged on a yarn path of the combined single yarns. There is known a spinning method in which spinning is stopped when a yarn breakage detection device such as an optical sensor detects that one of a plurality of single yarns has been cut.

[0003]

For example, when two drafted slivers are respectively supplied to separate air injection nozzles and two single yarns are being spun, one of the air injection nozzles is clogged. When the sliver was supplied to the air injection nozzle that caused the nozzle clogging, the sliver that was supplied to the other air injection nozzle may cause a problem of spinning a yarn thicker than a desired thickness. . In the spinning method described above, there is a problem in that it is not possible to detect an abnormal state in which two slivers are supplied to one of the air injection nozzles and one thick yarn is spun. Was.

An object of the present invention is to solve the problems of the above-described conventional spinning method.

[0005]

According to the present invention, there is provided a sliver which has been drafted to achieve the above-mentioned object.
Each is fed to a separate air injection nozzle to spin two single yarns.
Take out the two single yarns into a combined yarn and wind the combined yarn
In the spinning method that is to be taken , firstly , the thickness of the two plied single yarns is respectively detected by two photoelectric sensors whose optical axes intersect at right angles. Of the detected outputs, the larger output is set as the operation output , and the operation output is such that the two single yarns are in the steady state.
With respect to the reference output value of the twined single yarn when
When the air injection noise drops by 15 to 20%,
Nozzle clogging occurs and one of two slivers
Is determined to have been supplied to the air injection nozzle of
Second, the operating output is:
In the steady state, the yarns are combined and the reference output value of the two single yarns is
When the state of 15 to 20% decrease has continued for a predetermined time
Only one of the air injection nozzles was clogged
Thus , the spinning is stopped.

[0006]

EXAMPLES Examples of the present invention will be described below.
The present invention is not limited to the embodiment unless it exceeds the gist of the present invention.

First, the principle of the present invention will be described with reference to FIG.

In FIG. 1, S is a photoelectric sensor comprising a light projecting unit s1 and a light receiving unit s2. y1 and y2 are plied single yarns which are guided by the semicircular guide surface g1 of the guide member G and run perpendicular to the paper surface, and are lines connecting the center points of the single yarns y1 and y2. The vehicle travels while being juxtaposed such that the angle between X and the optical axis of the photoelectric sensor S is approximately 45 °.

Assuming that the diameters of the single yarns y1 and y2 are 1 (for convenience, no unit), the width w1 of the projection surface by the light from the light projecting unit s1 is 1.7. Then, one air injection nozzle causes nozzle clogging, and the sliver supplied to the air injection nozzle is supplied to the other air injection nozzle, as shown in FIG. 2,
When the single yarn y3 is spun by the two slivers, the diameter of the single yarns y3 spun from the two slivers is set to 1 as described above. In this case, the width is 1.4 (= 21/2), and the width w2 of the projection surface by the light from the light projecting unit s1 is 1.4.
Further, when one of the single yarns is cut, the width of the projection surface by the light from the light projecting unit s1 becomes 1.

As described above, the thickness of the single yarn y3 spun by supplying two slivers to one of the air injection nozzles is, as described above, the diameter of the single yarns y1 and y2 set to 1. In this case, the projected area is 1.4, so that the projected area is
Approximately 82% (1.4 ÷ 1.7) compared to the case of two y2
× 100). The projected area will be reduced by about 18%. Therefore, the output (voltage) of the photoelectric sensor S is also about 1
8% down. When one of the single yarns is cut, the projected area is about 59% (1 ÷ 1.7 × 100) and about 41% as compared with the case where two single yarns y1 and y2 are used.
% Projected area will be reduced. Therefore, the output (voltage) of the photoelectric sensor S is also reduced by about 41%.

Therefore, in principle, when the output (voltage) of the photoelectric sensor S drops by 18%, one of the air injection nozzles is clogged, and the other air injection nozzle has two nozzles. Sliver is supplied and one single yarn y
It is determined that the trouble of spinning No. 3 has occurred, and the spinning is stopped. In this way, nozzle clogging of the air injection nozzle is detected.

An embodiment of the present invention based on the above-described principle will be described below with reference to FIGS.

First, a twin yarn spinning machine as an example to which the spinning method of the present invention is applied will be outlined with reference to FIG.

The slivers 1a and 1b supplied from a plurality of cans (not shown) are passed through sliver guides 2a and 2b, respectively, to a back roller 3a and an apron 3 respectively.
The draft is supplied to a draft device 3 including a middle roller 3b having b ′ and a front roller 3c, and is drafted. The slivers 1a, 1 drafted by the draft device 3
b is supplied to the combustion device 4 in which the air injection nozzles 4a and 4b are juxtaposed, and the individual yarns y1 and y2 are spun by the respective air injection nozzles 4a and 4b. Single yarn y spun
1 and y2 are combined by the combination guide 5, and the single yarn y1,
The yarn Y composed of y2 is sent while being pinched by the nip roller 6a and the delivery roller 6b. And
The plying yarn Y contacts the friction roller 8 while being traversed by the traverse guide 7, is rotated, and is wound around the package 10 supported by the cradle arm 9.

Reference numeral 11 denotes a sliver separation guide provided between the back roller 3a and the middle roller 3b. Reference numeral 12 denotes a guide block provided on the left and right sides of the sliver separation guide 11.
1 restricts the spread of the two rows of slivers 1a, 1b separated by 1 from side to side. Reference numerals 13 and 14 denote dust suction ports such as waste thread and fly cotton, which are arranged so as to sandwich the combusting device 4. Reference numeral 15 denotes a point where the confluence of the single yarns y1 and y2 by the twining guide 5 is in the yarn path. Reference numeral 16 denotes a separation guide for preventing the yarns from moving along, and at the start of spinning or at the time of splicing, sucks the single yarns y1 and y2 spun from the air jet nozzles 4a and 4b, and the yarn is slackened. It is a slacks tube that prevents

Reference numeral 17 denotes a detection device disposed below the slacks tube 16 (on the side of the package 10) for detecting yarn unevenness during spinning, and in the present invention, detects a clogged air injection nozzle. It is something to do. The details will be described below with reference to FIG. 4 which is a schematic plan view of the detection device.

The detecting device 17 has a housing 17a in which a yarn running path 17a 'extending substantially vertically is formed. Inside the housing 17a, there is provided a first light emitting portion s1 and a light receiving portion s2. A single photoelectric sensor S and a second photoelectric sensor S ′ also including a light projecting unit s1 ′ and a light receiving unit s2 ′ are provided. Then, the first photoelectric sensor S
And the second photoelectric sensor S ′ are arranged such that their optical axes intersect at right angles, and when the yarn traveling path 17a ′ is viewed in a plane, the center line P of the yarn traveling path 17a ′
Therefore, the optical axis of the first photoelectric sensor S and the optical axis of the second photoelectric sensor S ′ are both inclined approximately 45 ° with respect to the vertical center line P. ing. The plied single yarns y1 and y2 travel in the yarn travel path 17a so as to be orthogonal to the paper surface.

Outputs (voltages) of magnitudes corresponding to the projected areas of the first photoelectric sensor S and the second photoelectric sensor S 'are sent to a comparison circuit c1, respectively.
Which output (voltage) is larger is compared, and only the larger output (voltage) is sent to the processing circuit c2 to be recognized. The combined single yarns y1 and y2 are shown in FIG.
As shown in FIG. 3, a line X connecting the respective center points of the single yarns y1 and y2 is formed by the optical axis of the first photoelectric sensor S and the second axis.
At 45 ° to the optical axis of the photoelectric sensor S ′, the projected area of the first photoelectric sensor S and the projected area of the second photoelectric sensor S ′ are the same, that is, the output of the first photoelectric sensor S (Voltage) and the output (voltage) of the second photoelectric sensor S ′ are the same, and the output to the processing circuit c2 is minimized. As described above, the diameters of the single yarns y1 and y2 are both
Assuming that 1, the minimum width of the light projecting surface is 1.7 for both the first photoelectric sensor S and the second photoelectric sensor S ′.
The plied single yarns y1 and y2 are usually wound around the package 10 in this state.

As shown in FIG. 5, the lines X connecting the center points of the plied single yarns y1 and y2 are orthogonal to the optical axis of the first photoelectric sensor S. When the threaded single yarns y1 and y2 travel, the projected area with respect to the first photoelectric sensor S is equal to two single yarns and becomes the maximum, and the diameters of the single yarns y1 and y2 are both assumed to be 1. In this case, the maximum projection plane width w3 is 2. On the other hand, the projected area with respect to the second photoelectric sensor S ′ is the smallest because it is equivalent to one single yarn, and the diameters of the single yarns y1 and y2 are
If it is assumed to be 1, the minimum projection plane width w4 is 1. Then, as described above, the comparison circuit c1 is configured to compare which output (voltage) is larger and to send only the larger output (voltage) to the processing circuit c2 to be recognized. In this case, the output (voltage) from the first photoelectric sensor S is input to the processing circuit c2 and is recognized.

As described above, assuming that the diameters of the single yarns y1 and y2 are both 1, the width of the projection surface corresponding to the maximum output (voltage) sent from the comparison circuit c1 to the processing circuit c2 is: 2, and the width of the projection plane corresponding to the minimum output (voltage) is 1.7.

Further, as described above, the two slivers 1a and 1b are supplied to one of the air injection nozzles 4a and 4b, and the thickness of the single yarn y3 spun, in other words, the first photoelectric sensor S and the first photoelectric sensor S The width of the projection surface of the second photoelectric sensor S ′ is
As described above, when the diameters of the single yarns y1 and y2 are 1, both are 1.4, so the width of the projection surface corresponding to the output (voltage) sent from the comparison circuit c1 to the processing circuit c2. Becomes 1.4.

On the other hand, in a situation where two single yarns y1 and y2 are normally spun from the two air injection nozzles 4a and 4b and are combined, the above-described detection device is used. A test is performed for a predetermined period of time to obtain an average value of the output (voltage) sent to the processing circuit c2 in advance, and the thus obtained single yarns y1 and y2 that are twined in a steady state in advance. The average value of the output (voltage) sent to the processing circuit c2 (hereinafter, this average value is simply referred to as the reference output value of the single yarn) is stored in the storage unit of the processing circuit c2. Then, in the twin yarn spinning machine in the actual operating state, the output (voltage) sent momentarily to the processing circuit c2 via the comparison circuit c1 (hereinafter, this output (voltage) is referred to as the operating output) is the processing circuit c2. Is compared with the reference output value of the twined single yarn stored in the storage unit, and when the operation output is reduced by a predetermined ratio from the reference output value of the single yarn, one of the air injection nozzles 4a, It is determined that nozzle clogging has occurred in 4b, and spinning is stopped.

As described above, the two air injection nozzles 4
a, two single yarns y1, which are spun normally,
As shown in FIG. 4, y2 is a line X connecting the center points of the single yarns y1 and y2 with respect to the optical axis of the first photoelectric sensor S and the optical axis of the second photoelectric sensor S ′. About 45 °
In many cases, the width w1 of the projection plane corresponding to the reference output value of the single yarn is
When the diameter of 1, y2 is set to 1, as described above, it is 1.7. Further, as described above, the two slivers 1a and 1b are supplied to one of the air injection nozzles 4a and 4b, and the thickness of the single yarn y3 spun, in other words, the first photoelectric sensor S and the second photoelectric sensor S The width w2 of the projection surface of the sensor S ′ is, assuming that the diameters of the single yarns y1 and y2 are 1,
1.4. Therefore, when the operation output is 82% (1.4 ÷ 1.7 × 100) of the reference output value of the ply single yarn, that is, the operation output is higher than the reference output value of the ply single yarn. When the pressure drops by 18%, one of the air injection nozzles 4a,
It can be determined that nozzle clogging has occurred in 4b.

In practice, it goes without saying that the criterion for the nozzle clogging of one of the air injection nozzles 4a and 4b is set to a constant value of 18%, the rate of decrease in the operation output from the reference output value of the single yarn. Therefore, it is necessary to have a predetermined width. If the lower limit of the decrease rate is set to less than 15%, two single yarns y1 and y2 are normally spun and ligated, but if there is a thin portion in the single yarns y1 and y2, the experience is reduced. Since the rate of decrease may be less than 15% either experimentally or experimentally, the lower limit of the rate of decrease is preferably set to 15%. If the upper limit of the rate of decrease is set to more than 20%, no clogging occurs in the air injection nozzles 4a and 4b, and one of the single yarns is cut and spun.
If there is a thick portion in the single yarn of the book, the reduction rate may exceed 20% empirically or experimentally. Therefore, the upper limit of the reduction rate is preferably set to 20%. When the diameter of the single yarns y1 and y2 is 1, the reduction rate of 15% corresponds to the width of the projection surface of 1.45.
0% corresponds to a projection surface width of 1.35 when the diameters of the single yarns y1 and y2 are 1.

Further, the rate of decrease in the operating output from the reference output value of the single yarns for judging that nozzle clogging has occurred in one of the air injection nozzles 4a and 4b is out of the above range even for a moment. In this case, the spinning can be configured to be stopped.However, in such a configuration, the frequency of malfunctions increases. It is preferable to configure so as to stop spinning. However, if the above-mentioned predetermined time is lengthened, one of the air injection nozzles 4a,
Since the defective yarn spun out after the nozzle clogging of the nozzle 4b is wound up into the package 10 for a long time, this time is set to an appropriate length. For example, when the yarn spinning speed of the above-described twin yarn spinning machine is 300 m / min,
Assuming that the predetermined time is 1 second, the length of the defective yarn spun after one of the air injection nozzles 4a and 4b is clogged with a nozzle reaches 5 m. Therefore, it is preferable that the predetermined time is less than 1 second,
It is more preferable to set the time to seconds or less.

The operation output sent to the processing circuit c2 via the comparison circuit c1 is compared with the reference output value of the single yarn stored in the storage unit of the processing circuit c2, and the operation output becomes
When the value falls outside the predetermined range as described above, a spinning stop signal is sent from the processing circuit c2 to the spinning stop device c3 to stop spinning. Based on the spinning stop signal, the air supply to the two air injection nozzles 4a and 4b may be stopped, the supply of the slivers 1a and 1b may be stopped, and the package 10
, And various means such as stopping winding can be adopted.

[0027]

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

In a twin yarn spinning machine that combines single yarns spun by separate air injection nozzles, two slivers are supplied to one air injection nozzle to produce a single thick yarn. It has become possible to detect nozzle clogging of the injection nozzle.

By setting the predetermined range of the output reduction rate of the operation output with respect to the reference output value of the plying single yarn to 15 to 20%, it is possible to reduce clogging of the air injection nozzle with less malfunction and improved accuracy. Can be detected.

Spinning is stopped when the output reduction rate of the operating output with respect to the reference output value of the plying single yarn is out of a predetermined range for a predetermined time or more. Can be prevented.

[Brief description of the drawings]

FIG. 1 is a plan view of a photoelectric sensor and the like for explaining the principle of a spinning method according to the present invention.

FIG. 2 is a plan view of a photoelectric sensor and the like for explaining the principle of the spinning method of the present invention.

FIG. 3 is a perspective view of a twin yarn spinning machine as an example to which the spinning method of the present invention is applied.

FIG. 4 is a plan view of a photoelectric sensor and the like for explaining the spinning method of the present invention.

FIG. 5 is a plan view of a photoelectric sensor and the like for explaining the spinning method of the present invention.

FIG. 6 is a block diagram for explaining a spinning method according to the present invention.

[Explanation of symbols]

 S 1st photoelectric sensor S '... 2nd photoelectric sensor y1, y2 ... single yarn 1a, 1b ... sliver 4a, 4b ..... Air injection nozzle 17 ... Detector

──────────────────────────────────────────────────続 き Continued on the front page (58) Fields surveyed (Int. Cl. ⁷ , DB name) D01H 13/16 D01H 4/02 B65H 63/00 B65H 63/032 B65H 63/036

Claims (2)

(57) [Claims] (1) Draft slivers are separated from each other.
To supply two air jet nozzles to spin out two single yarns.
Combine two single yarns into a combined yarn and wind the combined yarn
In the spinning method, the thickness of the two plied single yarns is respectively detected by two photoelectric sensors whose optical axes intersect at right angles, and among the outputs detected by the two photoelectric sensors, The larger output is the working output,
The operation output is such that two single yarns are combined in a steady state.
15-20% lower than the reference output value of the single yarn at the time
When it is lowered, one of the air injection nozzles is clogged.
And the two slivers become one air injection nozzle
A spinning method, characterized in that it is determined that the supply has been made and the spinning is stopped . 2. The two operation outputs are combined in a steady state.
15-20% lower than the standard output value of single yarn
Only when the air condition continues for a predetermined time,
Stops spinning as it is determined that the nozzle has clogged the nozzle.
The spinning method according to claim 1, wherein the spinning method is used.
Law.