JPH0621403B2 - Thread tension device by air flow - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Field of Industrial Application) [0001] The present invention relates to a yarn tensioning device by an air flow that is fed with a light tension.

(Prior Art) In a conventional circular knitting machine or flat knitting machine, when the yarn is fed from the bobbin to the knitting needle of the knitting machine, the yarn is loosened or tensioned by a tension device so that the stitches can be uniformly knitted. It was hung on a side tension, a top spring, a compensator, a spring tension plate, etc., and a tension of about 16 to 18 g was applied to the yarn to feed the yarn.

Particularly in a flat knitting machine, as shown in FIG. 3, the carriage C is intermittently reciprocated in the left-right direction, and a knitting needle is fed from a usu (also referred to as a yarn mouth) provided at the end of the carrier box B. It is necessary to slide the carrier box B further than the last needle to fold it back, and when knitting the extra yarn Y pulled by the sliding in the opposite direction, side tension T and the heavens are kept so as not to slacken downward from the uss. I had to get nervous with the spring S.

(Problems to be solved by the invention) When tensioning a thread using a spring, it is difficult to use a thin thread or a weak thread because the thread tension is high. Also, there is a problem that adjustment of tension requires a high degree of skill. Especially in flat knitting, where the carrier box slides back further than the final needle and is folded back, the length of the extra thread that is pulled differs depending on the knitting method, so it is extremely difficult to tension it with a spring, which may cause eye drop or drop. Since the spring causes a perforation, and the reaction force of the spring varies depending on the type of yarn and the knitting degree, there is a disadvantage that the strength of the tension greatly changes due to the difference in the spring reaction force.

[Structure of Invention]

(Means for Solving Problems) In tensioning a yarn using a spring, since the yarn that can be used for knitting is limited, the applicant devised a yarn feeding device that tensions the yarn by sucking air. Japanese patent application Sho 60-215
Although it was filed as No. 863, the improvement is further continued, and a ventilation control part is provided in an insertion hole penetrating in the yarn feeding direction, and the insertion hole is divided into an outlet side insertion part and an inlet side insertion part, and a new intake port. And an air supply port, an air intake path is provided between the outlet side insertion part and the air intake port, and an air supply route is provided between the inlet side insertion part and the air supply port for ejecting air in a direction reverse to the yarn feeding direction. The yarn can be appropriately tensioned by sucking air.

(Working) The thread insertion hole is divided into the outlet side insertion section and the inlet side insertion section by the ventilation control section, the outlet side insertion section communicates with the intake port through the intake passage, and the inlet side insertion section and the air supply port Since the air supply passage communicating between the two supplies air toward the inlet, the yarn on the yarn sending side from the ventilation control unit can be sucked and tensioned into the intake passage, and the yarn in front of the ventilation control unit You may be nervous in the return direction.

(Embodiment) First, the structure of the yarn feeder will be described with reference to FIG. 2. The yarn feeder is a yarn feeder 1 that applies tension to the yarn Y, a feeder 10 that feeds the yarn Y to the yarn feeder 1, and a feeder. The yarn breaker detector 20 is attached to the front of the yarn body 1 and a blower 30 for sucking and feeding air to the yarn feeder 1.

A trolley 35 capable of moving and fixing the yarn feeder 1 and the blower 30.
It is desirable to attach it to.

Next, the structure of the yarn tensioning device according to the present invention will be described with reference to FIGS. 1 and 10 of the embodiment. The yarn feeders 2 and 2'where the yarn feeders 1 are laminated in parallel, and the yarn feeders 2 and 2'are laminated on both sides thereof. Side plate 7,
7 ', each yarn feeding plate 2, 2'is provided with an insertion hole 3, 3'through which the yarn Y penetrates in the yarn feeding direction, and each yarn feeding plate 2, 2'
2'and at least one of the side plates 7'are provided with intake ports 4, 4'and air supply ports 5, 5'which intersect the yarn feeding direction.

As shown in FIG. 9, the insertion hole 3 formed in the yarn feeding plate 2 is provided with a small-diameter ventilation control portion 8 directly in the middle portion, or is formed by inserting a short cylinder 18, and the insertion hole 3 is fed from the control portion 8 to the yarn feeding side. The outlet side insertion part 3a
Further, the front side of the control section 8 is divided into the inlet side insertion section 3b.

The intake port 4 and the air supply port 5 formed in the yarn feeding plate 2 are preferably formed separately above and below the insertion hole 3 as shown in FIGS. 1, 6, and 8. As shown in the figure, it is also possible to provide holes below the insertion hole 3 as appropriate.

An intake passage 14 is provided between the intake port 4 and the outlet-side insertion portion 3a,
Further, between the air supply port 5 and the inlet side insertion portion 3b, the discharge passages 15 for ejecting air in the direction opposite to the yarn feeding direction are communicated with each other, the yarn reservoir 25 is provided in the suction passage 14, and the discharge passage 14 and the discharge passage 14 are discharged. Road 15
The air vents 6 and 16 which can be operated from the outside are attached in the middle of the process.

The yarn pool 25 is attached to the inlet of the suction passage 14 and
The air holes 27 are appropriately drilled to reach the front side of the air holes 27.
The yarn Y is provided so as to be dispersed and sucked without generating a vortex so that the yarn Y sucked by the yarn pool 25 does not twist or get entangled.

Air vents 6 and 16 attached to the intake passage 14 and the exhaust passage 15
Is for finely adjusting the amount of air passing through the suction air passages 14 and 15.

The yarn feeding device 10 vertically supports rollers 11 and 12,
The yarn Y is fed from the upper roller 11 to the insertion holes 3 and 3'of the yarn feeder 1, and the feed rollers 11 and 12 slip and rotate until the yarn Y is used for knitting. Send out accordingly.

The yarn breakage detector 20 is attached to the arm rod 9 extending forward from the yarn feeding plates 2 and 2'of the yarn feeder 1, and the movable piece 21 is inserted through the insertion holes 3 and 3'of the yarn feeding plates 2 and 2 '. When the yarn Y to be fed is passed through the knitting needle, the movable piece 21 floats above the contact 22 in the tensioned state of the yarn Y, and comes into contact with the contact 22 due to the yarn breakage.

The blower device 30 has an intake hose 31 on the intake side as shown in FIG.
Is provided with an air supply hose 32 and a nozzle 33 on the air supply side,
Further, an opening / closing tool 34 is connected to the suction and supply hoses 31, 32. The suction and supply hose 31 is connected to the intake port 4'of the yarn feeder 1, and the air supply hose 32 is connected to the supply port 5'of the yarn feeder 1. , And air is ejected from the nozzle 33 from the inlet of the yarn feeder insertion hole 3 toward the yarn feeding side, and the yarn Y is passed through. At that time, the suction air hoses 31, 3
If the opening / closing tool 34 of 2 is closed and the suction air can be stopped, the thread Y can be more easily inserted into the insertion hole 3.

Since the tensioning device of the present invention has the above-described structure, the yarn feeder 1 is arranged on the side of the flat knitting machine A, and the intake hose 31 of the blower device 30 is fed to the intake port 4'of the yarn feeder 1 again. An air supply hose 32 is connected to the air outlet 5 ', and the blower 30 is operated together with the knitting machine.

In order to pass the yarn Y through the insertion holes 3 and 3'of the yarn supplying plates 2 and 2'constituting the yarn supplying body 1, first, the intake air to the intake port 4 and the air supply port 5 is blocked, and the insertion hole 3 and Stop the 3'inhalation, then thread Y
The tip of the nozzle 3 is inserted from the yarn feeding device 10 into the inlet of the insertion hole 3, and the nozzle 3 of the blower 30 is directed from the inlet of the insertion hole 3 toward the yarn feeding side.
3 is blown with air and the yarn Y is passed by the air flow, and then the yarn Y exposed from the insertion hole 3 to the yarn feeding side is detected by the detector 20.
It is passed through the movable piece 21 and stretched to the knitting needle.

The other yarns Y are also passed through the insertion holes 3 and 3'of the yarn supplying plates 2 and 2'one by one by the same means, and the respective yarns Y are respectively fed.
It is passed through the movable piece 21 of the detector 20 provided at 2 '.

When air intake is started in the above state, air is sucked from the air inlet 4 of the yarn feeder 1 by the air blower 30, and air is sent to the air inlet 5 of the yarn feeder 1.

Since the intake port 4 communicates with the outlet side insertion portion 3a through which the yarn Y passes through the intake passage 14, air is sucked into the intake port 4 from the insertion portion 3a, and the yarn Y is pulled by the suction air flow. And the air supply port 5 passes through the discharge passage 15 and the yarn Y
Since it communicates with the inlet side insertion portion 3b through which the
The yarn Y is pulled in the returning direction by the air flow discharged to the inlet side insertion portion 3b, and the yarn Y is strained to about 3 to 6 g.

The tension of the yarn Y passed through the insertion holes 3 and 3 ′ of the yarn feeder 1 adjusts the suction amount from the outlet side insertion portion 3 a by the air vent 6 provided in the intake passage 14 or provides it in the air supply passage 15. The amount of air discharged to the inlet side insertion portion 3b is adjusted by the air vent 16, or the amount of air passage is adjusted by both air vents 6, 16.

When the yarn Y stretched around the knitting needle from the yarn feeder 1 is broken, the tension of the yarn Y is instantly lost, and the trailing end of the broken yarn Y is instantaneously moved by the intake port 4 communicating with the outlet insertion portion 3a. Is sucked into.

When the tension is lost due to the yarn breakage, the movable piece 21 of the yarn breakage detector 20 comes into contact with the contact 22 to stop the knitting machine, and
The suction and suction of the blower device 30 is stopped.

Similarly to the threading before knitting, the broken thread Y is passed from the inlet of the yarn feeder insertion hole 3 using the nozzle 33, and is stretched to the knitting needle via the detector 20.

The tensioning device of the present invention is not limited to the above structure, and the yarn feeders 1 having different yarn insertion numbers can be freely configured by increasing or decreasing the number of layers of the yarn feeding plates 2 and 2 ', for example. Then, in the outlet side insertion portion 3a of the insertion holes 3 and 3'through which the thread Y is passed,
If the long cylinder 13 is fitted as shown in FIG. 6 and FIG.
Even if the outlet is worn out by the thread Y passing through, it can be easily replaced. The yarn pool 25 attached to the intake passage 14 is a knitting method,
That is, it may be omitted depending on the usage state of the yarn Y.

〔The invention's effect〕

The tension device of the present invention divides the yarn insertion hole of the yarn feeder into an outlet-side insertion part and an inlet-side insertion part, the outlet-side insertion part on the intake side of the blower, and the outlet-side insertion part on the blower of the blower. Continuous to the air side,
Since the yarn is pulled in the returning direction by the air that is sucked and ejected in the direction opposite to the yarn feeding direction, the tension of the yarn can be reduced to 6 g or less. As a result, the abrupt resistance applied to the yarn when the carriage starts and stops is significantly reduced, the yarn breakage is reduced, and it is possible to use thin and weak yarns that have been difficult to use without breaking the yarn, It is also possible to knit at high speed even with yarn.

Further, the yarn waste adhering to the yarn is removed by the air sucked while passing through the insertion hole of the yarn feeder, so that knitting loss and defective products are reduced, and high quality and good texture are obtained. A uniform knitted fabric can be stably supplied. Moreover, even if a yarn breakage occurs during knitting, the yarn is returned instantly by the airflow that is tense, so the blower, knitting machine, etc. can be stopped earlier than the spring type, and its recovery is easy. Not only the yarn is supplied to the flat knitting machine or the circular knitting machine, but also a tensioning device for feeding the yarn with a constant tension has a practically useful effect.

[Brief description of drawings]

FIG. 1 is a view showing a state in which a yarn tensioning device using an air flow according to the present invention is used, FIG. 2 is a side view of a yarn feeder, FIG. 3 is a front view of a flat knitting machine, and FIGS. Is a longitudinal sectional view of an essential part showing an example of the structure of the yarn pool, FIG. 5 (a) and (b) is a transverse sectional view showing an example of the structure of the yarn pool and the intake port, and FIGS. 6 to 8 are views of the yarn feeding plate. Sectional view showing a structural example, FIG. 9 (a) (b) is a cross-sectional view of a main part showing an example of forming an insertion hole,
FIG. 10 is an exploded sectional view of the yarn feeder, and FIG. 11 is a side view showing a connection example of the blower. 1 ... yarn feeder, 2, 2 '... yarn feeder, 3, 3' ... insertion hole, 3a, 3b ... insertion portion, 4, 4 '... intake port, 5,
5 '... Air inlet, 6, 16 ... Air vent, 7, 7' ...
Side plate, 8 ... Ventilation control unit, 9 ... Arm rod, 10 ... Thread feeding device, 11, 12 ... Roller, 13 ...
... long cylinder, 14 ... intake passage, 15 ... air supply passage, 18 ... short cylinder, 20 ... thread breakage detector, 21 ... movable piece, 22 ... contact point, 25 ... thread pool, 27 ... ... Ventilation hole, 30 ... Blower, 31, 32 ... Hose, 33 ... Nozzle, 34 ... Opening / closing tool, 35 ... Cart, A ... Flat knitting machine, B ... Carrier box, C ... Carriage , P …… Computer, R …… Guide rail, S
…… Heaven spring, T …… Side tension, Y …… Thread,

Claims (2)

[Claims] 1. A yarn supplying body 1 for applying a tension to a yarn Y, and a yarn supplying body 1.
In a yarn feeder comprising a feeding device 10 for feeding the yarn Y to the yarn, a yarn breakage detector 20 mounted in front of the yarn feeder 1, and a blower device 30 for sucking air into the yarn feeder 1, 1
Is composed of a plurality of yarn feeding plates 2 and 2'which are laminated through the insertion holes 3 and 3'in the yarn feeding direction and plate sides 7 and 7'which are laminated on both sides thereof. And at least one side plate 7 '
And the air inlets 4, 4'and the air outlet 5, which intersect in the yarn feeding direction.
5 ′ are provided respectively, and ventilation control portions 8 are provided at the intermediate portions of the yarn feeding plate insertion holes 3 and 3 ′, respectively, whereby the insertion holes and the outlet side insertion portion 3 a on the yarn feeding side from the control portion are controlled. Section is divided into the inlet side insertion portion 3b and a suction passage 14 is provided between the outlet side insertion portion 3a and the suction port 4, and is reverse to the yarn feeding direction between the inlet side insertion portion 3b and the discharge port 5. A yarn tensioning device by an air flow, which is provided with a discharge passage 15 for ejecting air in a predetermined direction so that an appropriate tension can be applied to the yarn Y. 2. A yarn tensioning device using an air flow according to the first aspect of the present invention, in which the intake passages 14 and the air supply passages 15 of the yarn supplying plates 2 and 2'constituting the yarn supplying body 1 are provided. Air vents 6 and 16 that can be operated from the outside are attached, and each intake passage 14
The yarn pool 25 communicating with the insertion holes 3 and 3'is provided inside the
A thread tension device by an air flow in which a ventilation hole 27 is appropriately formed in the yarn pool 25 so that air sucked into the intake port 4 from the ventilation hole 27 does not generate a vortex in the intake passage 14.