JPH0355569B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application This invention relates to a yarn detection device for a textile machine, particularly a yarn doubling and winding machine.

〓Conventional technology〓 In textile machines that wind yarn after doubling it,
Yarn breakage is detected by a detection device installed at each yarn path of each single yarn.

As a result, the number of detection devices required is equal to the number of single yarns, and the problem was recognized that this required space and led to an increase in costs.

〓Problems to be Solved by the Invention〓 The object of the present invention is to obtain a detection device that can accurately detect the breakage of a single yarn constituting a doubled yarn by providing a detection device in the thread path after the yarn is doubled. shall be.

〓Means for solving the problem〓 A pair of photoelectric sensors are arranged in a plane perpendicular to the thread running path provided in the housing, so that the light emitted from the light emitter crosses each other orthogonally and reaches the light receiver. and a detection unit that detects the shadows of the plurality of single threads passing through the intersection of the light projections of the photoelectric sensors as a sensing amount in the light receiving unit of each of the photoelectric sensors, and a light receiving unit of each of the pair of photoelectric sensors. It consists of an arithmetic unit that adds up the sensed amounts and compares them with a reference value to detect breakage of a single yarn during doubling.

〓Operation〓 The light-receiving parts of a pair of photoelectric sensors sense the sensing amount obtained by the shadow of the single yarns that make up the doubling yarn, add up the sensing amounts, and compare the total value with a reference value. Detects thread breakage.

〓Example〓 Hereinafter, an example of the present invention will be described with reference to the drawings.

FIG. 1 is a perspective view showing one spindle of a spinning device equipped with a yarn detection device of the present invention, in which slivers S ₁ and S ₂ are supplied from a plurality of cans (not shown).
a draft device 1 for drafting the slivers, a twisting device 2 using an air jet for twisting the slivers S ₁ and S ₂ drafted by the draft device 1 to form single yarns Y ₁ and Y ₂ ; Join threads Y ₁ and Y ₂ and doubling
It is composed of a winding device 3 that winds up the winding device _Y3 . The draft device 1 includes a pair of back rollers 4a, 4b, a pair of middle rollers 5a, 5b, and a pair of front rollers 6a, whose circumferential speeds are set higher in order.
6b, and apron belts 7a, 7b are mounted on the middle roller pair 5a, 5b. 8a,
Reference numeral 8b denotes sliver guides placed in parallel to feed the slivers S ₁ and S ₂ supplied from the can to the pair of back rollers 4a and 4b. Further, 9 is a pair of back rollers 4a, 4b and a pair of middle rollers 5a, 5b.
The slivers S ₁ and S ₂ inserted in parallel into the pair of back rollers 4a and 4b are separated by a sliver separating guide provided between the slivers and the slivers. On the left and right sides of the separation guide 9, there are guide blocks 10 and 11, respectively.
is provided to restrict the spread of the two rows of slivers S ₁ and S ₂ separated by the separation guide 9 to the left and right.

Therefore, the two parts separated at this separation guide 9 position
The slivers S ₁ , S ₂ of the rows are the following middle roller pairs 5
Even at positions a and 5b and front roller pair positions 6a and 6b, two parallel rows are maintained and drafted,
It is introduced into the air injection nozzles 12, 13 of the twisting device 2. The twisting device 2 has air injection nozzles 12 and 13 provided in parallel in a housing 15 fixed to a frame 14.
2 and 13 have the function of independently twisting the supplied slivers S ₁ and S ₂ to form them into single yarns Y ₁ and Y ₂ .

However, the yarn detection device 16 of the present invention is provided between the guide member 17 and the delivery roller 18 for merging the single yarns Y ₁ and Y ₂ obtained in the twisting step 2 to form a double yarn state. There is.

Reference numeral 19 denotes a separating guide for preventing the confluence point of the single yarns Y ₁ and Y ₂ from floating upstream and downstream along the yarn path by the guide member 17. Prevent unevenness in the amount of entanglement between Y ₁ and Y ₂ .

Reference numeral 20 denotes a cutter provided at the position of the guide member 17, and the cutter 20 receives a yarn defect detection signal from a slab catch 21 that detects a yarn defect portion provided in the yarn path that descends to the winding device 3 via the delivery roller 18. It is then activated.

Reference numerals 22 and 23 are suction ports for dust such as threads and fluff, and 24 and 25 are air suction pipes, respectively.

26 are single yarns Y ₁ and Y ₂ spun from the air injection nozzles 12 and 13 at the start of spinning or splicing.
This is a slack tube that absorbs the thread and prevents it from sagging. The winding device 3 is a known cradle arm 2.
It consists of a bobbin supported by a bobbin 7, a friction roller 28 that is in rolling contact with the bobbin (or a package) and driven to rotate, and a traverse guide 29.

The yarn detection device 16 of the present invention, as shown in FIG. (not shown).

However, the photoelectric sensors 32 and 33 of the detection section are on a plane perpendicular to the yarn running path 30, and the light emitted from the light emitting sections 34 and 35 of each photoelectric sensor 32 and 33 crosses each other at right angles. The single yarns Y ₁ and Y ₂ traveling in the yarn traveling path 30 are arranged so as to reach the light receiving sections 36 and 37 and pass through the intersection of the projected light beams.

When the single yarns Y _{1 and} Y 2 drafted by the draft device 1 and spun by the twisting device ₂ are combined by the guide member 17 and reach the detection section of the yarn detection device 16 of the present invention, , the single yarns Y ₁ and Y ₂ run in a U-shaped yarn running path 30 and are detected by a photoelectric sensor 3
From the light emitting parts 34, 35 of 2, 33 to the light receiving parts 36, 3
It passes through the intersection of the floodlights reaching 7. At this time, the light receiving part 36 of the photoelectric sensor 32 detects the passing single yarn.
The sensing amount A is obtained by the shadows of Y ₁ and Y ₂ , and the light receiving section 37 of the photoelectric sensor 33 similarly obtains the sensing amount B, and each sensing amount A and B is calculated by the yarn detection device 16 of the present invention. (not shown) to calculate the total value, compare the obtained total value with a reference value, detect whether or not the single yarns that make up the doubling yarn are broken, and when yarn breakage is detected. The machine quickly issues a signal to control the operation of textile machinery such as yarn doubling and winding machines.

<Effects of the Invention> As described in detail above, the yarn detection device of the present invention is such that the light emitted from the light emitting portions intersect orthogonally with each other in a plane perpendicular to the yarn running path provided in the housing. a detection unit that has a pair of photoelectric sensors that reach the light receiving unit, and detects the shadows of the plurality of single threads passing through the intersection of the light emitted by the photoelectric sensors as a sensing amount on the light receiving unit of each photoelectric sensor; It consists of a calculation section that adds up the sensing amounts sensed by the respective light receiving sections of the pair of photoelectric sensors and compares them with a reference value to detect the breakage of a single yarn during doubling. No matter what position the traveling single yarn occupies within the intersection of the light emitted by a pair of photoelectric sensors, as long as there is no breakage of the single yarn, the total value of the sensing amount obtained by the photoelectric sensors will be the standard value. Therefore, by providing the yarn detection device of the present invention in the yarn path after the yarn has been doubled, it is possible to detect the breakage of the single yarn constituting the yarn with a high degree of detection accuracy. be able to.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing one spindle of a doubling and winding machine equipped with a yarn detecting device of the present invention, and FIG. 2 is a front view of a detection section of the yarn detecting device of the present invention. Y ₁ , Y ₂ ... single yarn, 1 ... draft device, 2 ... twisting device, 3 ... winding device, 16 ... yarn detection device, 30
... Yarn running path, 32, 33... Photoelectric sensor.

Claims (1)

[Claims] 1 A pair of photoelectric sensors are disposed in a plane perpendicular to the thread running path provided in the housing, and the light emitted from the light emitting part crosses each other orthogonally to reach the light receiving part, and the light emitted from the photoelectric sensor a detection unit that detects the shadows of a plurality of single threads passing through the intersection of the two as a sensing amount on the light receiving portion of each photoelectric sensor, and summing the sensing amount sensed by each of the light receiving portions of the pair of photoelectric sensors, A yarn detection device comprising a calculation unit that detects breakage of a single yarn during doubling by comparing it with a reference value.