JPS6081357A - Adjustment device for the length of yarn absorbed by the knitting machine - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device for adjusting the length of yarn taken up by a flat knitting machine or a circular knitting machine.

Absorption length of thread per France (hereinafter simply A L
The concept of ``T'' was proposed by Cendre de Leu/Herche L. Bonnetry and is now well known and utilized by American knitwear manufacturers. this is.

This is an important point to consider when adjusting the knitting machine. During the knitting operation - A, LT are kept constant so that a constant product of two dimensions can be obtained. A
L T Id, essentially (is a dropping cam $!
'& is a function of the yarn supply conditions. For identical yarns, it is a function of the feeding conditions themselves or the coefficient of friction of the yarn. If the adjustment of the dromping cam and the thread tightening device are the same, if the coefficient of friction of the thread changes during one knitting operation, the A L
T is also corrected J Shikoton Kokoru. As a result of such correction, irregularities occur in the dimensions of one knitted product, resulting in it being discarded as a defective product.

What is the simplest FIIr solution to overcome this drawback?

For each yarn in the knitting machine, a device was provided to actively feed the yarn. The feeding speed of the yarn in these feeders is adjusted to deliver to the knitting machine a length of yarn corresponding to the desired ALT. Thus, no matter what the coefficient of friction of the yarn, the knitting machine will
Evenly receives the threads.

However, this solution cannot cope with all types of knitting machines. In fact, continuous feeding devices are only applicable if the yarn is fed continuously to the liu.

This device cannot be adapted to knitting machines which are mainly circular knitted, especially flat knitting machines.

Another first step to overcome ALT irregularities during knitting is to modify the tenon of the yarn fed to the first knitting thread. In fact, variations in the coefficient of friction of the yarn are also amplified by variations in the tension applied to the yarn by small elements upstream of the knitting machine. Several devices are already known for correcting yarn tension variations. Swiss patent N dated September 6, 1974
No. 1112.160/74 discloses a device consisting of double tension/yon/gouge means, between which the thread passes, and electromagnetic means. Electromagnetic means act on the cup and vary the pressure it exerts on the thread. This action is controlled by the opening and closing of a switch, which is effected by the friction of a thread on a guide element which is part of the switch.

French patent No. 1.54 dated 1967/140
No. 4,469, variations in the tension of the thread move a roller which acts on a thin film pneumatic device to approximate and separate the two cups of the tensioner. French patent Nα71,40,701
In this case, variations in thread tension cause a rod fixed to a cam to move, which acts on a spring connected to the cup of the tensioning means.

Although these devices theoretically solve the above-mentioned problems, these devices have never been actually applied to flat knitting machines. This is due to resonance phenomena that occur when the means used are mechanical and interdependent, or
Because these devices are unreliable or lack sensitivity.

Or, the effect is biased towards success or failure.

Furthermore, if ALT is indeed dependent on the tension of the yarn fed to the knitting machine, and therefore the variation in ALT is a function inversely proportional to the variation in this tension, then the tension is It is a parameter that may change depending on the situation. Highly localized irregularities in the oiling of the yarn handle can result in rapid tension fluctuations. However, fluctuations in ALT that appear as defects in finished products do not result from such instantaneous and rapid fluctuations in tension. It is useful for the quality of the final product.

Therefore, what must be adjusted are the changes in the thread friction coefficient that occur gradually, -1, and the fluctuations in ALT due to rapid fluctuations in the average friction coefficient. fact.

The coefficient of friction (/1iA=)+f-1 is not 1, but it is 1 for the same monthly fee, for each lot, or for each display, even for the same type of yarn.

Different from batch to batch, spool to spool, or color to color.

From the above-mentioned viewpoints, the present invention aims to provide a device that can easily and reliably adjust the length of yarn absorbed by a knitting machine to a desired value, and the present invention has the following features: A tension adjuster for adjusting the tension of the yarn supplied from the thread winding to the knitting machine was provided between the tension adjuster and the knitting machine.

and a tension detector for detecting the tension of the thread,
The tension adjuster includes a tension generating member that is moved by a driving means.

The tension detector has two switches, [iiJ12
One of the switches rotates the drive means in one direction, and the other switch rotates the drive means in the opposite direction.

An embodiment of this invention is shown in the drawings.
Let me explain from the start.

FIG. 1 is a Ma '411 diagram of one embodiment of the present invention.

The yarn 2 fed to the flat knitting machine, of which only +N' 16 is shown in FIG.

In the embodiment shown in FIG. 1, the tension regulator 3 comprises a tension generating member having a protrusion and a driving means for driving the tension generating member. The thread 2 forms a barrier before passing through the thread guide 5 by passing through the tension p+ the air-raised F of the tensioner 3 and the first part of the thread 8.

Two protrusions 17 and 18 (d, fixed to one of both sides symmetrical with respect to the axis 1q of a cylindrical support part 20 as a tension generating member. By rotation of the cylindrical support part AJ' 20, 2 The arcuate surfaces of contact between the thread 2 and the protrusions 17 and 18 vary, and as a result, the tension applied to the thread 2 varies. 2-way rotating motor 4. and
It contacts the rotating surface of the support member 20 and is rotated by the motor 4.
It consists of a driven wheel 21.

Thus, when motor 4 rotates Q1 in one direction.

The contact arc surface between the thread 2 and the protrusion F and 18 increases J, therefore, the tension applied to the thread 2 by the tension meter adjuster 5 increases, and as a result, ALT decreases. do. On the other hand, if the motor 4 rotates in the opposite direction, the opposite effect will be obtained.

The tension detector 10 is formed by a thread guide 6 connected to a weight 9 in which a driving bar 13 is identified. The weight 9 is supported so as to be vertically movable.

Switches 14 and 15 are respectively attached to the upper and lower sides of the movable bar 13, and when the movable bar 13 moves in the direction of arrow 81, switch 15 closes, and when the movable bar 13 moves in the direction of arrow S2.

Switch 14 is closed. When switch 15 is closed.

The motor 4 rotates in a direction in which the arc surface of contact between the thread 2 and the arrows 17 and 18 increases, while when the switch 14 is closed, the motor 4 rotates in a direction in which the arc surface of contact decreases.

When the knitting machine is in operation, two yarns follow the yarn guide 8 and, before reaching the hook 16, pass through the tension adjuster 3, yarn guzzle 5, and tension detector 10. A certain tension is applied to thread 2, and when this is applied, a certain A L
Obtain T value. This tension is.

In particular, it is related to the size of the contact arc surface between the thread 2 and the protrusion F and the workpiece 8, and the weight of the tension detector 100 and weight 90. The size of this weight 9 is selected in advance by considering the desired tension. If +, A, and LT are constant during operation of the knitting machine, the tension detector 10 is.

It is balanced between fixed thread guides 5 and 7.

In fact, the length of the loop 5-6-7 formed by the thread 2 is 1 at the position of the weight 9 and each 11111 of the tension detector lO.
is determined by the equilibrium between the tension on the thread 2 at and the constant force resulting from the action of the five weights 9. If the coefficient of friction of the yarn 2 changes during operation of the knitting machine, the equilibrium of these forces will be disrupted. As the coefficient of friction increases and therefore A L T decreases, the total frictional force on the thread 2 upstream 414+1 of the needle 16 increases, which causes the weight 9 of the tension detector 10 to increase.
From below, move in two directions. For this, the thread guide moves from 6 to 6' and the movable bar 13 moving in the direction of the arrow S2 closes the switch 14, which causes the motor 4 to move through the contact arc between the thread 2 and the projections 17 and 18. Rotate in a direction that reduces the surface. As a result, the tension X x
The tension applied to the thread 2 by the device 3 is reduced.

The weight 9 of the tension detector 10 is moved again from 6' to 6 by the movable bar 13 until the switch 14 is opened again. This position corresponds to an acceptable value of A, L'I'. The coefficient of friction of yarn 2 decreases during operation of the knitting machine,
Therefore, if ALT increases, this procedure is of course reversed. That is, to move the thread guide lever 6 of the tension detector 10 to 6''.

The movable bar 13 moves in the direction of the arrow s1, and the switch 15
is closed. As a result, the motor 4 rotates in a direction that increases the arcuate surface of contact between the thread 2 and the protrusions 17 and 18. This increases the tension applied to the yarn 2 by the tension regulator 3.

The tension detector 10 returns to its equilibrium position and the movable bar 1
3id-Switch 15 is open and located midway between the two switches 14 and 15.

In the second embodiment shown in FIGS. 2 and 3, the tension regulator 3 has two cups as tension generators. Thread 2 (c), lower cup 1 of tension regulator 3
1 and the upper cup 12. Upper cup 12
is fixed. The lower cup 11 is movable in the height direction by a driving means, and the lower cup 11 and the upper cup are movable in the height direction.
, 2 can be strongly or weakly pressed against the thread 2 passing between '1-l, h f+: Rough Gen') I
/r 6+ l i(-4r-r+: small -k Σ can apply a small pressure. The driving means is.

Motor 4 rotatable in two directions - suppression member 35. It consists of a threaded rod 34 and a spring 33. The rotational force of the motor 4 is transmitted to the suppression member 35.

The suppression member 35 moves linearly along the threaded rod 34. This suppressing part 35 (σ15) compresses or loosens the compression of the pin 33, thereby applying pressure to the lower cup 1. In this embodiment,
The suppressing member 35 is composed of a butterfly nand that is rotated by two arms of a butterfly nand 36 fixed to the shaft of the motor 4. This may - be a gear wheel rotated by a gear wheel fixed to the shaft of the motor 4;

Thus.

As a result of the rotation of the motor 4 in the direction - the thread 33 is compressed, the pressure of the lower cup 11 applied to the upper cup 12 increases, and the tension applied to the thread 2 by the tension regulator 3 increases. , as a result, ALT decreases. If the motor 4 rotates in the opposite direction, the opposite effect will be obtained.

The skewer] detection lever 0 has a lever 28f that pivots around a horizontal axis 23. A thread guide 6 is attached to one end of this lever 28, and a magnet 2 is attached to the other end.
4 is attached to No. 1. The principle of tension balance is the same as that shown in the first embodiment described above. However, the magnet 24 corresponding to the first 11 applies an upward force from below to the thread 2 passing through the thread kite o via the lever 28 which pivots around the horizontal axis 2:3. The difference is that the direction is not from top to bottom as in the embodiment. The magnet 24 may be provided with a balance weight 20 that slides along the threaded loft 3o. By choosing the weight of the balance weight 29, or if the balance weight 29 is the same, the threaded loft 3
l4 to thread 2 by moving it along 0
The amount of tension can be adjusted. Magnet 24ba.

■It is located between two LS (flexible blade switch) type magnet switches 25 and 26. One of the two magnetic switches 25 and 26 controls the rotation of the motor 4 in one direction, and the other one controls the rotation of the motor 4.
control the rotation of in the opposite direction. When the thread guide 6 of the tension detector 10 moves toward 6' due to a decrease in ALT due to an increase in the coefficient of friction of the thread 2, the arm of the lever 28 supporting the magnet 24 moves in the direction of arrow S2. .

Magnet 24 closes Magnen I switch 26.

As a result, the rotation of the motor 4 or the compression of the spring 9 is loosened, and the lower cup 1 is controlled in a direction so as to move away from the upper cup 12. Arm 28 of tension detector 10
returns to its equilibrium position, the red sea bream 24 also returns to its intermediate position, the magnetic switch 26 opens, and the motor 4
until it stops.

ALT increases, which causes the tension in thread 2 to decrease. On the other hand, if the tension in the thread 2 decreases, the thread guide moves from 6 to 6'', thereby.

The magnetic switch 25 is actuated, and the same operation is performed in reverse. This second embodiment allows the constant l-1T tension on the thread 2 to be adjusted to a smaller value than in the first embodiment. AT, T
Once the position of the magnet 24 has been determined, the W1 interlock of the W1 section allows the positioning of the seven magnet switches 25 and 26 at the upper and lower parts of the end of the lever 28 that supports the magnet 24. It is eliminated using various clever means possible. Magnet switch 25 and 26 position f
What is the means of determining σ?

In the embodiment shown in FIG. 3, there is a support plate 32 and a support arm 27, the support plate 32 having a handle 31 and being rotatable about the horizontal axis 23r. A magnetic switch 25 is fixed to a support plate 32,
On the other hand, the magnetic switch 26 is fixed to a support arm 27. The support arm 27 is rotatable about the horizontal axis 23 and can be fixed at a predetermined position on the support plate 32 by suitable fixing means. Thus A
Magnetic switch 25 that determines the adjustment range of LT
and 26 is the distance between support arm 27 with respect to support plate 32.
The desired average value of ALT is obtained by moving the magnetic switches 25 and 26 between the magnetic switches 25 and 26.
This is obtained by moving the support plate 32 so that the magnet 24 is located.

In order to provide stability to the tension detector 10, it is preferable that the entire tension detector 10 has a V-shape such that its center of gravity is below the rotation axis 23.

The yarn guide 7 is installed just before the upstream side of the knitting machine.

It is attached to a detector 37, and this detector 37 is
It detects whether or not the thread 2 is moving, and allows adjustment of A L 'I' only when the thread 2 is moving.

This detector 37 is particularly useful when the device of the invention is applied to non-circular knitting machines in which the feeding of the yarn 2 takes place in a reciprocating motion. in this case.

For example, while the hook moves from left to right, right to left, or right to left, left to right, the tension detection It is necessary to inform the device 10 whether the thread is stationary or moving. This detector 37 is also useful if the knitting needle stops for any reason. That is, in this case, since the thread 2 tends to loosen, the thread guide 6 tends to move to position 6''.In this case, the tension detector 10 must be weighed by the sensor 37.

When the magnet switch 25 closes, the motor 4 rotates, thereby compressing the spring 3.

In the form of a decrease in ALT! J1. Even though the tension in the thread 2 does not increase, the tension detector lof returns to its equilibrium position. If the knitting iron is operated again in this state, the tension adjuster 3 will apply excessive tension to the yarn 2, causing the yarn 2 to warp by 1JJ7'.

The tension adjuster 3 used in the first embodiment shown in FIG. as the fourth
1 to 6 show another example of a tension regulator that operates in the same manner as this.

Tension adjustment shown schematically in FIG. 4 2)) (Bow 1. Consists of a fixed cylindrical friction body 4Q, a cylindrical support member 42, and a protrusion 41 attached to the side surface of the cylindrical friction body 4Q. The support member 42 rotates around 1lii14:s. Due to the rotation of the wheel 44 in contact with the rotating face of the cylindrical support member 42, the cylindrical support member 42 rotates around the axis 4.
Rotate around 3. The cylindrical support member 42 is driven by a motor (not shown). The tension shown schematically in Figure 5? The A adjustment device is.

It consists of a plurality of thread guide units 45b through which the thread 2 is passed - which are connected to a further plurality of thread guide units 45a. The thread guide unit 45a is fixed at 7″
L or thread guide unin) 4.5b.

It is vertically movable under the action of a cam 46 and automatically rotated by a motor (not shown).

A tension regulator called a tap type is schematically shown in FIG. : It consists of a friction body 47, has a cylindrical shape, and is driven by a wheel 4B that comes into contact with the rotating surface of the friction body 47.

Wheel 48 is rotated by a motor (not shown).

Still another tension regulator is schematically shown in FIG. 7, which uses balls 49, but a pressure knee may be used instead of the four balls. The thread 2 enters into the tubular body 50 through an orifice 51 formed in the side wall of the tubular body 50, exits from the flat wall surface Jr (through the formed orifice 52), and exits from the 4yJt II 310.

The thread 2 is in contact with this wall and is gripped by the ball 40. It depends on whether the pressing force of the ball 45) against the thread 2 by the action of the spring 53 is strong or weak.

Tension fluctuates. The spring 53 is compressed more or less strongly by the action of the eccentric cam 54. Eccentric cam 5
4 is rotated by a motor (1 and 1 not shown).

Furthermore, as another tension N1 regulator, a braking rotation type can also be used. In this tension regulator, the thread is
It passes over a wheel that rotates freely with the shaft closed in the middle. This wheel is rotated by friction without the yarn touching its rotating surface. In this type of tension regulator, the tension is established by braking a wheel driven by the thread. This braking is effected by friction between the wheel and the brake. This friction is f/1 as shown in Figure 8.
It may be mechanical friction, such as, or it may be magnetic friction. In other words, it is j, -1. For example, it may be the friction generated by rotating the motor. ), Zhang Kal? shown in Figure 8? (The 8-piece hakama is attached to the shaft of the disk 56, which is pressed against the flat surface of the January 2 wheel 61.) - Lot 60 with screws
5'/, and a gear 58 which performs rotational movement on a threaded loft 60. The motor 4 rotates the gear 58 by rotating the gear strip 59, so that the gear 58 moves along the threaded rod 60. When the motor 4 rotates in one direction, the screw thread is rotated '6 o.

moves in the direction of compressing the spring 57, and therefore the disk 5
The braking force due to 6 will increase. On the other hand, if motor 4 rotates in the opposite direction, 1. ] 1 power is reduced by 6 swivels.

The device of the present invention is capable of threading yarn by means of a co-feeding device (i.e., it is impossible to provide guidance to the contract or j+'+i
Attach it to the 10th place. Circular knitting machine with striping unit 2 Jacquard flat knitting machines 1 Yaf node circular knitting machine, flat knitting machine 1 piece of cotton
・Hose size or pantyhose holding machine, knox and stocking room ・Ffl Z)+s As explained above, according to this invention, 0 A very useful advantage arises when the length of yarn taken up by the knitting machine can be easily and reliably adjusted.

[Brief explanation of drawings]

FIG.
Figures and Figure 3fd, 11j (Fire of this invention, 1
FIGS. 4 to 8 are schematic explanatory views of a tension regulator used for the explanation of -. In 1 Me 11a1, 1. Bottle 2 Thread 3 Tension adjuster 4 Motor 5~B Thread kite 9 Weight 10 Tension detector 1" ・F section cup] 2 Upper canno 13-ij), 1 lil + bar 14.1.5.
・Switch 16 Plan 117.18 ・ Rush 19
・ ・ Proposal 2〇 - Support part 2 Tow wheel 23 Horizontal axis 24 - Magnet 25.26 Magnet]・Swivel 27 - Support arm 28 - 2 levers Balance weight 30 ・ Rod with miso 31 -
Handle 32 Support plate 33...Spring 34 Lot with insert 3.5 Pressing member 36 Spider nut 37 Detector 40 Cylindrical friction body 41 Protrusion 42 Cylindrical support member 43 Shaft 44 Wheels 45a, 45b Thread tip unit 46 Camutto 47
Cylindrical friction body 18 Wheel 49-Ball 50-Bone rest 51.52 Orifice 53 Spring b4 Eccentric cam! ]6 Tisf 5'n Spring 58 Gear 59 Gear

Claims (1)

[Scope of Claims] (1) A tension adjuster provided between a bobbin spool and a knitting machine for adjusting the tension of the yarn supplied from the bobbin spool to the knitting machine, and the tension regulator V7j and the knitting machine. was established between. and a tension detector for detecting the tension of the thread, the tension regulator having a tension generator moved by a driving means, and the tension detector having two switches. , one of the two switches
1. A device for adjusting the length of yarn taken up by a knitting machine, characterized in that one rotates the driving means upward and the other rotates the driving means in the opposite direction. (3) The device according to claim (1), wherein the driving means comprises a motor capable of rotating in two directions. (3) The tension detector has a thread guide through which the thread passes, and a fixed rod, and the two switches are opened and closed by a 5W movement of the rod. The device described in scope item (1). (4) The apparatus according to claim (3), wherein the tension detector has a weight, and tension is applied to the thread by the weight of the weight. (5) The tension detector has a lever that swings about a horizontal axis, one end of the lever is attached to a thread guide, and the other end is attached to the fixed Device according to claim 3, characterized in that it acts as part of a rod. (6) The device according to claim (1), wherein the two switches are electrical switches. (7) The device according to claim (1), wherein the two switches are magnetic type, and the tension detector has a magnetic material. (8) The device according to claim (5), wherein the lot has a balance weight that slides along the lot. (9) A special feature characterized in that it has a switch positioning means that makes it possible to correct the distance between the two switches (1'6) and the relative position of the two switches with respect to the fixed lot. (The apparatus according to claim (3). uO), the tension regulator or the barrier +1; 1.IT is present, and when the drive means rotates in the work direction, the tension between the thread and the tension is generated = it'FA Is the contact arc surface between J!; 4
1. In addition, when the drive means rotates in the opposite direction, the contact arcuate surface decreases.
/11 The device described in paragraph (1). tll), the tension regulator is of a gripping type, and when the driving means rotates in one direction, the pressure applied to the yarn by the gripping portion side increases, and when the driving means rotates in the opposite direction, the pressure increases. 2. Device according to claim 1, characterized in that the amount of water is reduced. +121. The tension regulator is of a braking rotation type, and when the driving means rotates in one direction, the braking member increases the 6111 power of the wheel rotated by the thread,
11. The device according to claim 1, wherein the braking force decreases when the drive means rotates in the opposite direction.