JPH0349867B2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to a machine for winding thread onto a bobbin.

The present invention particularly relates to a device for simultaneously winding a plurality of threads onto a bobbin.

When winding a plurality of threads onto a bobbin, for example eight threads, it is important that each thread has the same tension and the same length.

As is well known, when winding yarn onto a flanged bobbin, the yarn guide that holds the yarn group is
A traverse mechanism causes the bobbin to be moved back and forth in a reciprocating manner with respect to the axis of the bobbin. In prior art mechanisms, when the yarn reaches the flange of the bobbin and the yarn guide is reversed, the yarn package on the bobbin tends to be produced in greater quantities at each end of the bobbin than in the middle. , so that the yarn package has an increasingly larger diameter at each end. Conversely, if the yarn package on the bobbin is not fully wrapped around each end of the bobbin, a yarn package with a smaller diameter at each end will be produced. This type of yarn package is flat in the middle but slopes upwardly or downwardly at each end.

From the above, it can be seen that in yarn packages where the diameter increases or decreases at both ends, some yarns may be longer than others, or each yarn may be exactly the same length but not have the same tension. Recognize. This is an undesirable condition and is a drawback when the yarn package is used, for example, for reinforcing industrial or hydraulic hoses.

Undesirable overhang or dropout at each end of the yarn package can be avoided by the use of a traverse cam that is specifically designed for a particular package. Because the packages produced by the winding operation depend on numerous variables, including yarn type and denier, it is extremely impractical to provide as many different crisscross cams as necessary for each yarn package. It is.

The main object of the invention is to provide an improved machine for winding thread onto bobbins.

In particular, an important object of the present invention is to provide a mechanism to avoid bulging or missing threads at the ends of a package which, if left unattended, would produce a yarn package having a larger or smaller diameter at each end than at the intermediate portion. There is a particular thing.

Another object of the present invention is to provide a bobbin winder traverse mechanism that produces yarn packages of constant diameter.

The foregoing objects of the invention are achieved by the provision of a slide bracket which is moved by a traversing cam back and forth across the length of the bobbin. The bell crank pivot point is connected to and supported by the slide bracket. The slide bracket slidably supports an adjustment rod that is pivotally connected to one end of the bell crank. The other end of the bell crank is provided with a cam follower, which follower is arranged on a fixed cam track tilted in one direction, ie, tilted upwards, for example to the left or right. A yarn guide is attached to and supported by the adjustment rod. In the preferred embodiment, the yarn guide extends to the package so that there is no chance of the yarn becoming dislodged from its intended position on the package. As the slide bracket is moved back and forth, the bell
Moves with the crank. As the mechanism oscillates, for example from left to right, a cam follower mounted on a fixed upwardly inclined track causes the bell crank to rotate continuously counterclockwise around its pivot point. move. This causes the top end of the bell crank to move continuously to the left and the slidable adjustment rod to be continuously pushed to the left relative to the slide bracket. This causes the yarn guide to be continuously moved to the left relative to the sliding bracket that is continuously moving to the right. A similar result is obtained when the slide bracket swings from right to left. The bell crank is continuously rotated clockwise about its pivot point by a cam follower moving along a fixed downwardly sloping cam track, thereby continuously rotating the adjustment rod. Continuously pushed to the right against a sliding bracket that moves from right to left. As a result of the above-mentioned action, yarn overhang at both ends of the bobbin is avoided and the yarn has a constant diameter over the entire length of the package.
You can get package.

Although the slope of the cam track is fixed for any particular winding operation, the slope or angle of the slope of the cam track can be adjusted to accommodate various winding conditions and the associated movement of the yarn. Adjustable.

In Figure 1, the number of multiple pieces (here, 8 for explanation purposes)
The number of threads (assumed to be books, but any other number may be used) is
As shown in detail in FIG. 2, it is drawn from a drum or other source (not shown) through separator 11 and under support pin 12. The eight threads (Y) are guided in a downwardly sloping direction, protected by a cover or guide 13, and pass through a porcelain eyelet separator 14 mounted on a bracket, as shown in FIG. The thread then passes under a pair of Godet wheels 16 rotatably mounted on staggered shafts 17.
The Godet wheel receives adjustable tension by a mechanism shown in FIG. 5 and described below. 8
The book thread then moves upwards, protected by a cover or guard 18, to the bobbin 20.
A drive mechanism assembly, designated generally by the reference numeral 21, drives the bobbin 20 in rotation. The bobbin drive assembly 21 includes a drive motor,
Preferably, the drive motor is a variable speed DC motor. The drive mechanism and how it drives the bobbin 20 is well known and will not be described in detail.

FIG. 4 is a side view of the same machine supported by adjustable legs 25. In FIG. 4, a pair of Godet wheels 16 with threads wound around them and a shaft 17 supporting the Godet wheels 16 are shown in dotted lines. As shown, the shaft 17 is mounted in a bearing 28 in a plate 27 fixed to the frame 26. Godet rolls work by keeping the individual threads separated from each other.
The goal is to provide the desired tension to the thread.

At the upper end of the frame 26, a housing 30 of the main traverse assembly is supported on a base plate 29. Each of the components of the main traverse assembly shown in FIG. 4 is shown and described in further detail in the figures of the other drawings discussed below. In FIG. 4, the bobbin 20 of the thread traversing assembly and the beak-shaped guide 70 are shown.
, a guide holder 71, a yarn guide roller 61, a bracket 60, and a traverse camshaft 3.
1, a traverse cam 32, and a cam track plate 54.

FIG. 5, viewed in the direction of the arrow about line 5--5 of FIG. 4, shows the device for adjusting the tension on the Godet wheel 16. As shown, attached to each Godet shaft 17 is a pulley 80 which is encircled with a brake band 81 made of a suitable material such as cloth, rawhide, or the like. brake·
Band 81 is connected at its ends to a pair of brackets 82 and tensioned by a device comprising rollers 83, springs 84, adjustment studs 85 and adjustment knobs 86.

Now, FIG. 9 will be explained. A cam track plate 54 having cam tracks 53 sloping upwardly from left to right is clamped to fixed support base 29. A cam follower roller 52 connected and supported by one end of the bell crank 50 engages a cam track 53. 10-12, the upper end of an L-shaped mounting bracket 43 is secured to the slide bracket 40, and the bell crank 5 is secured to a pivot stud 44 located at the lower end of the bracket 40.
0 is supported.

As seen in detail in FIG. 13, the slide bracket 40 is secured to a stud 134 integral with and projecting laterally from the cam shoe 34 which engages the cam track of the traverse cam 32. . The traverse cam 32 is mounted on a traverse camshaft 31 which is driven by the main drive assembly. A cam roller 33 and a guide piece 36 that rides on a guide plate 35 are attached to the stud 134 . It can be seen that when the traverse camshaft 31 is driven by the drive mechanism, the cam shoe 34, cam roller 33, guide piece 36, and slide bracket 40 are moved back and forth in a reciprocating manner.

As the slide bracket 40 is reciprocated back and forth, the bell crank mounting bracket 43 is also moved back and forth, causing the bell crank 50 to pivot.
Bell crank 50 is also moved back and forth as it is pivotally secured to mounting bracket 43 at 44.

The slide bracket 40 has a bell at 51.
An adjustment rod 41 pivotally connected to the upper end of the crank 50 is supported for sliding movement. Thus, as previously discussed, as bell crank 50 is moved back and forth, adjustment rod 41 is moved with it. A bracket 60 on which a beak-shaped guide 70 is attached is fixed to the adjustment rod 41 and moved by it. This will be discussed in more detail later in connection with the description of FIGS. 7 and 8. Here, a bracket 60 fixed to the adjustment rod 41 is used as a collar 45 whose position on the rod 41 can be adjusted using a set screw 46 or the like.
I'll stop here to point out that the beaked yarn guide is fixed.

In FIG. 10, the adjustment mechanism is shown with the traverse mechanism approximately halfway through its stroke.

FIG. 11 shows the state of the adjustment mechanism when the traverse mechanism reaches the right end of its stroke. It can be seen that at the right-hand limit of the travel of the mechanism, the cam roller 52 has reached its highest position, ie the top of the upwardly sloping cam track 53. As a result, the bell crank 50 pivots counterclockwise around the pivot point 44 and rotates around the adjusting rod 4.
1 is moved to its leftmost position. This can be understood by comparing the position of bracket 60 in FIG. 11 with its position in FIG. In other words, the bell crank 50 continuously moves the adjustment rod 41 to the left so that the beak guide 70 is moved toward the right end of the bobbin as the slide bracket 40 is moved toward the right end of the bobbin by the traverse mechanism. The speed at which it is moved to the right relative to the swing mechanism is reduced.

In FIG. 12, the traverse mechanism and adjustment mechanism have reached the left end of their travel. As the cam follower roller 52 descends the downwardly inclined cam track 53, the bell crank continuously rotates counterclockwise about the pivot point 44, thereby causing the adjustment rod 41 to rotate relative to the slide bracket 40. continuously pulled to the right. Thus, in FIG. 12, cam follower roller 52 has reached its leftmost limit position and adjustment rod 41 has reached its rightmost position. In other words, the slide
As the bracket 40 is moved to the left by the traverse mechanism, the bell crank 50 continuously pulls the adjusting rod 41 to the right, thereby forcing the bracket 60 and beak guide 7 to the traverse mechanism.
0 and the movement speed is reduced.

The above configuration is effective when cross-winding yarn around a bobbin. For example, when winding three threads with a total width of 1/8 inch to a width of 3/4 inch,
Since the spiral loops of the forward and return routes of the criss-crossing have opposite trends and different spiral pitches, they are cross-wound and the winding is reliably stable, which is very preferable.

Also, with the above configuration, in the second criss-crossing in the same direction, a loop is formed adjacent to the loop formed the first time, so the thread is wound around the bobbin densely and with a uniform diameter, which is preferable. It is.

Here, FIGS. 7 and 8 will be explained.
This figure shows how the beak yarn guide 70 is attached to the bracket 60 attached to the adjustment rod 41. Bracket 60 is generally a triangular shaped bracket having an extension 160 with a pair of rollers 60 attached thereto.
Between the rollers 69, as seen in FIG.
There is a rotation stop rod 120 attached at its end to the side plate 38 of the frame, such as by screws 39.

Bracket 60 is mounted on and supported by adjustment rod 41 for movement therewith in the axial direction of the bobbin. 8 threads guide 7
0, the threads pass through the tip of the bracket 60 on the way there (FIG. 6).

The bracket 60 includes a full tube stop plate 91 and a holding plate 9 for the beak-shaped yarn guide 70.
A stepped screw 90 with 5 attached thereto is attached. The position of the stop plate 91 can be adjusted using screws 92 in slots 93 or the like. As the thread is wound onto the bobbin, the beak-shaped yarn guide 7
As the zero end 170 rises, the tip of the stop plate 91 is inclined with the stop rod 94, and an electric device or the like acts to stop the drive to the bobbin.

The beak-shaped yarn guide 70 is secured to a beak-shaped retaining plate 9 in the form of a bent plate by screws 74, as shown in detail in FIG.
5 can be adjusted freely. Attached to plate 95 is a pivot stud 96 having a spring biased locking plate 97 having an L-shaped slot 98 pivoted thereon. Bracket 6
The stud 68 attached to the slot 98 is normally located within the longer slot of the slot 98. During a bobbin change, when the beak yarn guide 70 is manually lifted to the raised position, the beak retaining plate 95 pivots counterclockwise on the stepped screw 90, as seen in FIG. The stud 68 then slides down the longer hole in the slot 98 and into the shorter hole. This locks the spring-biased plate 97 and prevents the beak-shaped guide 70 from falling during bobbin replacement.

In the case of prior art winding mechanisms, the cam track and the bell crank are not used to ensure a yarn package of constant diameter, as for the purpose of the present invention, but rather to ensure a tapered yarn package, i.e. It was used to obtain packages with sloped edges. In the prior art, tapered yarn packages have been formed by using a bell crank having a cam follower in contact with a cam track whose slope changes in response to the sensing of the diameter of the package at all times during traversing. Ta. In other words, in response to an increase in the diameter of the package, the angle of inclination of the cam track is increased such that the traversing of the beaked yarn guide stops and reverses at an ever-changing limit position. Such limit positions are generated at constantly increasing distances from the package end.

Although a bell crank and a cam track are used in the present invention, they are used for a completely different purpose and in a completely different manner than in the prior art. As already made clear, the object of the invention is to achieve a yarn package of constant diameter. The cam track is fixed during winding of any particular bobbin selected for thread. However, its slope is manually adjustable to accommodate different yarn winding conditions.

In a preferred embodiment of the invention, the beak-shaped yarn guide extends into the package. In this respect, this beak-shaped yarn guide differs from that of conventional prior art winders. In common prior art machines, the beak-shaped yarn guide does not extend further inward than the flange of the bobbin. If the beak-shaped yarn guide is separated from the package cage, there is a risk that the yarn will become dislodged from its intended position on the package cage.
This possibility is due to the fact that the beaked yarn guides can be used to
This is avoided by the configuration of the present invention, which does not reach the package and rides on these.

[Brief explanation of drawings]

FIG. 1 is a front view of a bobbin winder that may incorporate the improvements of the present invention. FIG. 2 is a detailed view of the thread separating device as seen at point 2 in FIG. 1 in the direction of the arrow; Figure 3 is the first
Detailed view of the porcelain eyelet separator seen in the direction of the arrow at point 3 in the figure. FIG. 4 is a side view of the winding machine shown in FIG. 1. FIG. 5 is a detailed view of the Godet wheel tensioning system taken along line 5--5 of FIG. FIG. 6 is a plan view of the machine shown in FIG. 1. 7th
The figure is a view taken in the direction of the arrow at point 7 in Figure 6. FIG. 8 is a view taken at point 8 in FIG. 6 in the direction of the arrow. FIG. 9 is a front view of an inclined cam track used in the adjustment mechanism provided by the present invention. FIG. 10 shows a cam follower of an adjustment mechanism including a cam track, a bell crank, a slidable adjustment rod, a slide bracket and a beak yarn guide retainer during movement along its cam track. Detailed view of the case in position. FIG. 11 is a detailed view generally similar to FIG. 10 but showing the adjustment mechanism when the cam track follower is at the rightmost end of the cam track; Figure 12 is approximately the same as Figure 10 and 1.
FIG. 2 is a detailed view similar to FIG. 1 but showing the mechanism when the cam follower is at the leftmost end of the cam track; FIG. 13 is a detailed view showing a zigzag cam, a cam show, a cam roller, a guide piece, and a slide bracket attached to a guide piece for moving back and forth with respect to the bobbin. 20... bobbin, 29... frame, 32... zigzag cam, 33... zigzag cam follower, 40... slide bracket, 41... adjustment rod, 50... bell crank, 51... coupling device, 52... cam follower, 53...cam track, 70...yarn guide.

Claims (1)

[Scope of Claims] 1. A bobbin winding machine having a traverse cam, a traverse cam follower, and a traverse cam follower, comprising: a slide bracket mounted to make a traverse motion with the traverse cam follower; and the slide bracket. a bell crank mounted for pivoting relative to the winder; a cam track plate fixed to the frame of the winder and providing a cam track inclined with respect to the winder; disposed within the cam track; a cam track follower carried on one arm of the bell crank; an adjustment rod slidably mounted on the slide bracket; and a cam track follower coupled to the tip of the other arm of the bell crank and pivotally connected to the adjustment rod. and a yarn guide fixed to and movable with the adjustment rod, the slide bracket being moved by the adjustment rod in a direction opposite to the direction in which the slide bracket is moved by the traverse cam follower. A bobbin winder in which the cam track is tilted to move the rod relative to the slide bracket. 2. In the bobbin winding machine according to claim 1, the inclination angle of the cam track is
A bobbin winder that can be manually adjusted for various thread winding conditions. 3. A bobbin winder according to claim 1, wherein the inclined cam track is linear, such that the bell crank is continuous during movement of the cam track follower in one direction. A bobbin winder in which the bell crank continuously rotates in one direction during movement of the cam track follower in the other direction. 4. A bobbin winder according to claim 1, wherein the yarn guide is adjustably mounted on the adjustment rod. 5. A bobbin winder according to claim 1, wherein the yarn guide extends to a yarn package formed on the bobbin. 6. The apparatus of claim 3, wherein the cam track is tilted upwardly from the left to the right, and as the slide bracket moves to the right, the bell crank moves the adjustment rod to the left. the adjusting rod is pulled to the right as the slide bracket moves to the left.