JPS6133006Y2 - - Google Patents

Description

[Detailed description of the invention] This invention uses a two-stage yarn feeding type double twisting machine that twists multiple yarns together, and the yarn cutting machine that cuts the other yarns when one yarn breaks. Regarding equipment.

If even one of the fed yarns breaks in the yarn combining/twisting machine, the wound yarn becomes a defective yarn that does not include the one fed yarn, and becomes unusable. Furthermore, if even one of the yarn feeding bobbins becomes empty first, the yarn wound thereafter will be defective yarn as described above, and therefore, an appropriate means for preventing such a situation is desired.

Conventionally, as disclosed in Japanese Patent Application Publication No. 57-501090, spinning machines and the like that combine or twist two separately fed single yarns and wind them. There is a well-known technique in which one of the single yarns is monitored for breakage at the point of yarn doubling (plying and twisting) during winding, and when the single yarn breakage occurs, the remaining single yarn is cut.

However, for example, in a two-stage yarn feeding type double twisting machine, the combining and twisting point is inside the yarn twisting machine, that is, the yarn coming out of the yarn twisting machine is already combined and twisted yarn, so the above-mentioned Therefore, it was not possible to monitor single thread breakage. Therefore, in the conventional two-stage yarn feeding type double twisting machine, it has not been possible to prevent defective yarns from being wound up due to single yarn breakage.

The purpose of the present invention is to solve the above-mentioned problems.The present invention monitors single yarn breakage of yarns that have already been twisted, cuts other yarns at the same time as the yarn breakage occurs, and winds the yarn. The purpose of the present invention is to provide a device that substantially stops the

Hereinafter, embodiments of the present invention will be described based on the drawings.

FIG. 1 shows the entirety of a yarn twisting machine employing the present invention, and 1 is a known double yarn twisting machine equipped with two yarn feeding bobbins B and B placed one above the other. The yarns y, y pulled out from both bobbins B, B pass downward through a yarn path (not shown) from the top of the tensor body 2, and then pass through a yarn path formed in the radial direction from the center of the rotary disk 3 to the outside. is derived. The spindle 4 integrated with the disk 3 has a running belt 5.
As a result, both yarns y and y are twisted together to form a balloon, and then move upward from the yarn guide 6 through two rollers 7 and 8 and an overfeed roller 9. run,
While being traversed by the traverse guide 10,
It is wound onto a winding package P which is rotationally driven by a friction roller 11. Reference numeral 12 denotes a bracket fixed on a frame 13 installed in the direction of the front and back of the paper, and a winding angle adjusting roller 8 is fixed in a long hole 14 formed in an arc shape in the bracket 12 so as to be adjustable in position. An arm 15 that pivotally supports the roller 7 is attached to the bracket 1 by a pin 16.
It is supported on 2. The winding angle adjusting roller 8 changes the winding angle of the yarn with respect to the overfeed roller 9 by changing its position within the elongated hole 14, thereby adjusting the tension of the yarn being wound. be. The pin 16 is fixed on the bracket 12, and the arm 15 is rotatably supported by the pin 16 and biased in the direction of arrow 17 by a mechanism to be described later. Therefore, the oscillating roller 7 is arranged so that the yarn Y that is twisted and wound up has the original two pieces inside it.
When the main yarns y and y are included, it is at the position shown by the solid line, and when one of the yarns y and y breaks, the tension of yarn Y decreases to the position shown by the two-dot chain line. At this time, the thread Y also changes its travel path from the solid line position Y1 to the two-dot chain line position Y2. 1
Reference numeral 8 denotes a cutter fixed to the frame 13, and the cutting portion at the tip thereof extends to a position that slightly intersects the above-mentioned chain double-dashed line position Y2 of the thread Y.

FIG. 2 shows the swinging mechanism of the arm 15, with pin 1
After the spring 19 is installed around the cap 6, the cap 20 is placed on the cap 20. One end of the spring 19 is inserted into a hole 21 formed in the arm 15, and the other end is inserted into a hole 22 formed in the cap 20. After adjusting the biasing force of the spring 19 by appropriately turning the cap 20 by hand, By screwing the screw 23 into the hole 24, the cap 20 and the pin 16 are fixed to each other.

To explain the operation of the device described above, in FIG. 1, when a yarn breakage occurs in one of the yarn feeds y during twisting, the tension of the yarn Y being wound decreases and the arm 1
5 rotates in the direction of arrow 17 by the torsional biasing force of spring 19, and yarn Y moves to position Y2 shown in two-dot chain line while being engaged with swing roller 7. At this time, the thread Y is engaged with the tip of the cutter 18 and cut, and even if the package P continues to rotate thereafter, the thread is not wound, and the winding is substantially stopped. The yarn cut by the cutter 18 is usually the one that has not been broken, and therefore some defective yarn may be mixed into the package P, but this does not prevent the arm 15 from turning smoothly. This can be almost prevented by increasing the biasing force of the spring 19 as much as possible. The biasing force of the spring 19 is appropriately set in addition to the above-mentioned circumstances, taking into consideration the position of the tip of the cutter 18, the degree of change in thread tension before and after thread breakage, and the like. Note that the swing roller 7 may be made into a thin pin-like object, or the arm 15 may be made into a thin wire-like object to speed up the response when the thread breaks. Further, a plurality of rollers or pins may be provided. Furthermore, the present invention can be applied to various types of twisting and twisting machines in addition to those using a double yarn machine, and the number of yarns fed may be three or more.

As explained above, according to the present invention, it is possible to reliably detect the occurrence of yarn breakage by using a simple structure for yarns that have already been combined and twisted in a two-stage yarn feeding type double twisting machine, and also to detect yarn breakage that remains at the same time as the occurrence of yarn breakage. The yarn can be cut instantly, and defective yarns can be prevented from being wound up due to yarn breakage.

[Brief explanation of drawings]

FIG. 1 is a diagram showing the entire yarn combining and twisting machine, and FIG. 2 is an exploded perspective view showing a part of the yarn cutting device according to the present invention. 1... Double twisting machine, 7... Swinging roller, 15...
...Arm, 16...Pin, 19...Spring,
P... Winding package, 18... Katsuta, B...
Bobbin, Y, y...thread.

Claims (1)

[Scope of utility model registration request] Two yarn feeding bobbins are mounted on top of each other, and the two yarns pulled out from the two yarn feeding bobbins are combined and twisted by the two-stage yarn feeding type double twisting machine and the yarn twisting machine. A yarn cutting device installed between a winding package for winding yarn, which is pivotally supported at the end of an arm rotatably supported around a pin, and engages with the traveling yarn that has been twisted and twisted. A swinging roller is rotatably provided, the arm is biased to swing in a certain direction between the pin and the arm, and a spring having a biasing force equal to the yarn tension of the twisted yarn is interposed, so that the swinging roller is rotatably provided. A two-stage yarn feeding type double twisting machine, characterized in that a cutter is provided on the running path of the yarn that moves by the spring biasing force when the yarn engaged with the roller becomes a single yarn, and cuts the yarn. Thread cutting device.