JPH0453791B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to an improvement in a method for threading a winder in a textile machine.

[Conventional technology]

The fiber manufacturing process, for example, the false twisting process in which the fibers are crimped, is carried out using a multi-spindle winder.

In other words, after a certain amount of yarn is wound onto an empty bobbin supported by a cradle arm and given a predetermined surface pressure, a full cage is replaced with a new bobbin and winding starts again. At that time, the yarn continuously supplied from the false twisting process is transferred to the waist pulley and taken up without stopping its supply, and during this time the full package is doffed. Next, the empty bobbin is donned (tube changed), and then the thread temporarily wound around the waist pulley is pulled to the ratchet wheel at the end of the empty bobbin and threaded, and the normal winding is carried out. It will be restarted.

[Problem to be solved by the invention]

However, in the conventional threading method of a winding machine, the surface pressure between the empty bobbin and the drive roller is constant at the time of threading and at the beginning of winding.

For this reason, when threading the empty bobbin is carried out simultaneously with the simultaneous start of all spindles after the full package has been switched, slippage occurs between the empty bobbin and the drive roller, making it extremely difficult to successfully thread the empty bobbin. The problem was that the rate was poor.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above problems and provide a threading method for a winding machine that has a high threading success rate when threading an empty bobbin.

[Means to solve the problem]

A threading method for a winding machine according to the present invention for achieving the above object includes the following steps: While the continuously supplied yarn is taken up by the yarn taking-off means, the yarn is taken from the yarn taking-up means by a drive. A roller, a cradle arm that supported a bobbin,
Threading the yarn onto the pobbin of a winding machine having surface pressure applying means attached to the cradle arm and applying surface pressure to a contact surface between the drive roller and the pobbin, and starting winding of the yarn. In the threading method of a winding machine, the surface pressure applying means uses a cylinder, and the cylinder makes the surface pressure at the time of threading higher than the surface pressure after the start of winding of the yarn. It is characterized by

Hereinafter, an example of a winding machine for applying the method of the present invention will be described based on the drawings.

(1) Yarn path configuration for yarn winding FIG. 1 is a sectional view of the winding machine, and FIG. 2 is a partial plan view of FIG. 1.

In the figure, the yarn Y that has been processed in the false twisting process (not shown) is passed through the drive roller 5 through the fulcrum guide 2 of the winder 1, the slide bar 3, and the traverse device 4.
The material is wound onto a bobbin B which is rotationally driven by frictional contact.

This winding machine 1 is normally configured with a large number of spindles arranged in the horizontal direction per stage, and furthermore, a plurality of upper and lower stages, and FIGS. 1 and 2 show one of these stages.

The swing fulcrum guide 2 is located on an extension of the stroke center of the traversing device 4 and is fixed to the front surface of the step 6 or the front beam 11.

The slide bar 3 is provided on a fixed lower arm 7 extending from the frame of the winding machine 1 via a bearing 8 so as to be slidable in _the longitudinal axis direction. A thread shifting collar 9 is fixed (see Fig. 2).

The traverse device 4 drives the traverse guide 10 using a known means such as a scroll cam.

In addition, on the upper part of the traverse device 4, there is a thread transfer cutter 24 for cutting the thread between the waist pulley 19 and the package cage 9 after transferring the thread to the waist pulley 19, and a thread transfer cutter 24 for cutting the thread between the waist pulley 19 and the package cage 9, and a tail yarn Y on the bobbin B. The _screw guide 26 (see Figure 2) for forming the traverse yarn in the normal winding state
It is fixed outside the range of Y ₁ .

(2) Configuration of yarn take-up means Next, the configuration of yarn take-up means provided in the winding machine shown in FIG. Explain.

FIG. 3 is a sectional view showing the structure of the yarn take-off means, and FIG. 4 is a plan view of FIG. 3.

In the figure, the yarn take-up means is mounted on a shaft 13 which is rotatably provided via a bearing 12 fixed to the front beam 11.As shown in FIG.
Pawl wheel 18, waist pulley 19, waist reservoir 2
0 and flange 21, and are provided outside the traverse range of the yarn path Y ₁ (see FIG. 2) in the normal winding state.

In this yarn take-up means, the waist pulley 19 is driven by a full winding signal or a dotting signal, and this signal moves the yarn shifting collar 9 of the slide bar 3 from the solid line position to the two-dot chain line position in FIG. As the yarn Y moves, it moves to the yarn path of _Y3 , is hooked on the waist pulley 19, and is temporarily wound around the waist pulley 19.

(3) Structure of yarn conveying means Next, the yarn temporarily transferred to the waist pulley 19 is conveyed to a position near the bobbin B held by the cradle arms 44L and 44R, and the yarn Y is transferred to the bobbin B. The structure of the yarn conveying means provided in the winding machine of FIG. 1 for threading will be explained.

FIG. 5 is a plan view showing the structure of the yarn conveying means, and FIG. 6 is a side view of FIG. 5.

In the figure, the guide member 31 is attached to a labor-saving roller chain that is slidably housed inside a square pipe 34.

As shown in FIG. 1, the right end of the square pipe 34 is fixed to the front beam 11 with a fastener 39a, and on the left side of the fixing point is a waist pulley 19, as shown in FIG. After bypassing the upper part of the traverse device 4 and the drive roller 5 and forming a slightly downwardly curved part 34a at a position past the narrow part of the drive roller 5 and the cradle arm 44R,
As shown again in FIG. 1, the sprocket 36 is bent along the outer periphery of the sprocket 36 driven by the drive shaft 35, and is fixed to the rear lower beam 88 with a fastener 39d.

The square pipe 34 is provided with slits in a portion required for engagement between the sprocket 36 and the roller chain and a portion required for movement of the guide member 31, so that the guide member 3 moves as the sprocket 36 rotates.
1 reciprocates along the curved path of the square pipe 34 from the position of the introduction guide 14 to a position 34p slightly ahead of the curved point on the drive roller 5,
The other end of the roller chain is connected to the sprocket 36.
It is designed to reciprocate within the square pipe 34 fixed to the rear lower beam 88.

That is, this yarn conveying means is a moving member 31 that moves due to the rotation of the sprocket 36, and the second
The yarn _Y6 shown in the figure is scooped up and conveyed to the end surface of the bobbin B attached to the cradle arm 44.
The thread is attached to the ratchet wheel 3 on the end surface of the bobbin during rotation as shown in Figure 2.
0 and is wound onto the empty bobbin B.

Therefore, threading can be performed by operating the thread conveying means.

A thread hook cutter 41 for cutting the thread between the ratchet wheel 30 and the waist pulley 19 after thread threading is attached to the upper part of the cradle arm 44R via a cutter holder 43, and the folded portion at the tip becomes a guide piece 42. A thread hooking cutter 41 is installed between them, and is fixed in a non-contact state with the bobbin bearing 29R.

(4) Bobbin Supporting Means and Surface Pressure Applying Means Next, the configurations of the bobbin support means and surface pressure applying means provided in the winding machine shown in FIG. 1 will be explained.

FIG. 7 is a plan view of the bobbin support means having the cradle arm 44R as a main part, and FIG. 8 is a side view of FIG. 7.

Bobbin B has cradle arms 44L and 44R
At the free end of the rotatable bobbin bearings 29L, 29
It is attached via R. Cradle arm 44
L and 44R rotate the bobbin B around the swing rotation shaft 51 by the pushing and pulling action of the spool 55 from the winding start position E where it is in rotational engagement with the surface of the drive roller 5 to the dotting position H. It is possible to move.

The cylinder 55, which is a means for applying surface pressure to the drive roller 5 of the bobbin B, has its movable end attached to the projecting arm 52 via a link pin 53 and a cylinder head 57, and its fixed end is attached to the bearing of the swing rotation shaft 51. It is connected via a pin 56 to a bracket 54 which is fixed to the bracket 50 . Also, this cylinder 55
In this case, the cradle arm 44 is at the winding start position E in FIG.
When the cradle arm 44 is in the position , when pressure is applied to the push side, it rises to the dotting position G side, and conversely, when pressure is applied to the pull side, the empty bobbin attached to the cradle arm and the drive roll move. Surface pressure increases. When the cylinder 55 is opened to atmospheric pressure, no surface pressure is exerted by the cylinder.

In addition, the cradle arm 44R has a pin 46
The cradle arm 44 rotates within a certain rotation angle using the fulcrum (see Fig. 7) as a fulcrum.
The cradle arm 44 is pivotally connected to L so as to be openable and closable so as to hold the bobbin B.
A long lever 47 is attached to the side of R opposite to the side that supports the bobbin B.

Rotatable bobbin bearings 29L and 29 are provided at the free ends of the cradle arms 44L and 44R, respectively.
R is attached parallel to the swing rotation shaft 51.
In this case, the bobbin bearings 29L and 29R protrude in opposite directions, their outer circumferences fit into the inner diameter of the bobbin B, and their flange portions abut against the ends of the bobbin.

The flange portion of the bobbin shaft 29R on the side where threading is carried out is a ratchet wheel 30 provided with at least two threading pawls 30a (see FIG. 8), and the threading pawls 30a are provided with thread hooks 30a as shown in FIG. The yarn conveyed by the guide member 31 is threaded.

The auxiliary rail 45L is attached below the bobbin bearing 29L and directly to the cradle arm 44L, and is configured to form a low forward slope of 3° to 5° at the dotting position H.

On the other hand, the auxiliary rail 45R is attached to the lower part of the bobbin bearing 29R of the cradle arm 44R at a position facing the auxiliary rail 45L. When the cradle arm 44 is placed in the dotting position G of FIG. 8 and the cradle arm 44R is spread out relative to the arm 44L, the fully wound package falls onto the auxiliary rails 45L and 45R due to its own weight.

70L, 70R are the above-mentioned auxiliary rails 45L, 4
This is a reserve rail for storing a fully wound package P that has fallen onto 5R due to its own weight, and is fixed to a front support 91 that is erected from the main body of the winding machine in a state where it is tilted downward to the left in the figure.

Therefore, if the cradle arm 44 is moved to the donning position H, the full package cages on the auxiliary rails 45L, 45R will be moved to the reserve rails 70L, 70.
Automatically rolls out onto R due to its own weight. That is,
Dotsfing is performed.

Note that when the cradle arm 44 is in the donning position H in FIG. 8 or FIG. 1, the cradle arm 44R is expanded relative to the cradle arm 44L. At this time, one empty bobbin on the store rail 82 in FIG. 1 is moved to the donning position H of the cradle arm 44 in the same figure by rotating the feed arm 75,
Close the cradle arm 44R to remove the empty bobbin B.
It can be held on its arm. That is, donning can be performed.

As described above, the winding machine to which the present invention is applied is provided with the cylinder 55 as a surface pressure applying means.

Note that if the surface pressure applying means for making the surface pressure at the time of threading higher than the surface pressure at the initial stage of winding and the surface pressure applying means for applying the surface pressure itself at the initial stage of winding are the same cylinder 55, the cylinder 55 The application of initial surface pressure by this method prevents failure of rotation of the bobbin B due to forgetting to lower the cradle arm 44 or insufficient lowering of the cradle arm 44, or insufficient surface pressure, and contributes to improving the threading success rate.

The application of this initial surface pressure can be easily changed by time control; it is opened at the beginning of the main winding, and both ports become atmospheric pressure again, and the surface pressure applied to the bobbin by the cradle arm 44 is It may also be possible to switch to a separately provided surface pressure applying function that corresponds to changes in the winding diameter.

〔Example〕

The processed yarn continuously supplied from the false twisting process was wound by the winder shown in FIG. 1 to obtain a full winding signal.

In response to this signal, the continuously supplied processed yarn was caused to be taken up by the thread taking-off means, and doffing and donning were performed during the taking-up.

Next, in order to thread the yarn, the cylinder 55 is pressed to the pull side to make the surface pressure on the empty bobbin 20% higher than the surface pressure of the yarn winder, that is, the surface pressure at the initial stage of winding. The running yarn being taken up by the yarn taking-up means was moved to the end face side of the empty bobbin by the yarn conveying means, and the yarn was threaded onto the empty bobbin.

After threading, the pressure in the cylinder 55 is released to atmospheric pressure to return the surface pressure on the bobbin to the initial winding surface pressure.
Winding continued.

The threading method of the present invention was able to significantly increase the success rate of threading compared to conventional methods as described below.

The implementation conditions and results are as follows.

Number of spindles: 216 Spindle speed: 600m/min Type: 75 denier x 36 threads (polyester) Threading success rate When surface pressure increases during threading: 98.5% When surface pressure does not increase during threading: 91.5% Effects] The method for threading a winder according to the present invention can produce the excellent effects described below.

(1) Thread the continuously supplied yarn onto the bobbin,
In the threading method of the winding machine that starts winding, the surface pressure on the contact surface between the bobbin and the drive roller at the beginning of winding the yarn can be made higher than the surface pressure immediately after the winding starts using the surface pressure applying means. Slips between the bobbin and drive roller, floating of the bobbin, etc., which frequently occur in conventional threading methods, are significantly reduced.

Therefore, the success rate of threading from the threading guide to the bobbin is significantly improved.

(2) Furthermore, by improving the yarn threading success rate, it becomes possible to perform a series of continuous processes such as simultaneous tuffing and simultaneous dodging using all spindles of the winding machine, thereby dramatically improving the operating rate of the winding machine.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing an example of a winding machine in which the method for threading a winding machine according to the present invention is implemented, and FIG. 2 is a partial plan view thereof. Figure 3 shows the X-
FIG. 4 is a sectional view taken in the direction of the X arrow, and FIG. 4 is a plan view of FIG. 3. FIG. 5 is a plan view showing the structure of the yarn conveying means, and FIG. 6 is a side view of FIG. 5. FIG. 7 is a plan view of the bobbin support means having the cradle arm 44 as its main part, and FIG. 8 is a side view of FIG. 7. DESCRIPTION OF SYMBOLS 1... Winder, 2... Swing point guide, 3... Slide bar, 4... Traverse device, 5... Drive roller, 6... Step stool, 7... Lower arm, 8... Bearing, 9 ...Itoyori collar, 10...Ayasuri guide, 1
1...Front beam, 12...Bearing, 13...Shaft, 1
4...Introduction guide, 15...Elbow guide, 16
... Winding position guide, 17... Auxiliary winding section, 18...
...Rawl wheel, 19...Waist pulley (take-up body), 2
0... Waist reservoir, 21... Flange, 24...
Thread transfer cutter, 26... Screw guide, 27...
...Guard, 28...Timing guide, 29...
Bobbin bearing, 30... ratchet wheel, 31... yarn guide member, 34... square pipe, 35... drive shaft, 36...
... Sprocket, 39 ... Stopper, 41 ... Thread cutter, 42 ... Guide piece, 44 ... Cradle arm, 45 ... Auxiliary rail, 46 ... Pin, 47
...Extension lever, 48...Eccentric cam with flange, 49...
...Shaft, 50... Bearing, 51... Swing rotation shaft, 52
... Thrusting arm, 53... Link pin, 54...
Bracket, 55... cylinder (surface pressure applying means),
56...Pin, 57...Cylinder head, 70...
... Reserve rail, 71 ... Drive shaft, 72 ... Split clamp, 73 ... Pin, 74 ... Stopper, 75
...Feed arm, 76...Pin, 77...Bobbin holder, 78...Return spring, 79...Balance spring,
82...Store rail, 83...One separate arm, 84...Shaft, 87...Rear column, 88...Rear lower beam, 91...Front column, B...Bobbin, E...
Winding start position, F...Full winding position, G...Dotting position, H...Donning position, J...Returning position, K
...midpoint, L...middle point, M...middle point, N...
... Threading possible point, ... End point, P ... Package cage,
Y... Yarn.

Claims (1)

[Scope of Claims] 1. While taking up the continuously supplied yarn with the yarn taking-off means, the yarn is taken up from the yarn taking-off means by a drive roller, a cradle arm supporting a bobbin,
Threading the yarn onto the bobbin of a winding machine having surface pressure applying means attached to the cradle arm and applying surface pressure to a contact surface between the drive roller and the bobbin, and starting winding of the yarn. In the threading method of a winding machine, a cylinder is used as the surface pressure applying means, and the cylinder makes the surface pressure at the time of threading higher than the surface pressure after the start of winding the yarn. A method for threading a winding machine.