DE1774465A1 - Rewinder for one or more rewinding of web material - Google Patents

Description

Maschinenfabrik Benninaer AG. Uzwil "I.

(Switzerland)

Rewinder for one or more wrapping of web material

With the wide dyeing known under the name Jigger » machines, textile material, e.g. a web of fabric, is transferred from one rotating roller to another rotating roller mostly wrapped around several times and passed through the dye liquor. This works in interchangeable One roller always functions as a take-up roller and the other as an unwind roller.

Bl-Pil-Uinder June 10, 1968 H / gl

109851/037 «

. "^ Λ, -Λ

In this process it is known to be of great importance that both the winding speed and the Tension to which the material is subjected remain constant because these two factors ensure uniformity Coloring of the material is of crucial importance «An even tension of the material at the Wrapping processes in the jigger are also used for subsequent ones Treatments are important because, for example, if the tension fluctuates, the length of fabric wound on it becomes uneven Preserve width resulting in docking with uneven faces.

These irregularities in the winding speed and the material tension in the course of the winding process are due to the fact that the circumferential speed of the docks produced on the winding roller constantly increases while the peripheral speed of the roll located on the other roller when

t. Unwinding steadily decreased.

To achieve the desired uniform winding speed and material tension during the wrapping process, a number of devices are required.

108851/0378 _Eav __

t INSPECTED

on the one hand on a purely mechanical basis with infinitely variable friction gears that are adjusted by master gears influenced by the wrapping process, on the other hand also purely electrical drives with speed and torque controllers, or hydrostatic drives. ^v

These known rewinders generally have the disadvantage

indicates that they meet the requirement for uniform material λ

tension and web speed during the wrapping process can usually only approximate and »something special is noticeable in the purely electric rewinders, that the constructive and cost mäaaiga effort in bears no relation to the success achieved

The present invention aims at the creation of a Umrollera, which is technically simplest, economical and reliable design also with i

the most sensitive lengths of fabric to keep the Web speed and tension guaranteed.

For this purpose, according to the invention, let a rewinder for one or more rewinding of web-shaped material from one driven winding roller to another driven roller, and vice versa, wherein the rewinding drive '. each winding roller is fed by a motor from

109851/0378

INSPECTED

arranged, infinitely variable friction gear takes place and for the automatic control of the friction gears according to A regulator controlled by the change in web length between the winding rollers is used for the progressive winding process characterized in that each of the two mutually identical friction gears by a traction sheave and a through a spherical segment formed output member is formed which around the plane containing the drive pulley axis vertical geometric axis of the ball segment can be swiveled and is rotatable about an axis lying in this plane, the axes of rotation of both output members always being parallel are guided and the point of contact between the drive pulley and the output member is selected in both friction gears so that the radius from the pivot axis of the output member to this Point of contact in said plane with the vertical connection of pivot axis and drive pulley axis in this Level with a friction gear an angle of +45 and with other friction gear includes one of -45, and that by the controller the two output members are equal to one another according to the material application through the path Angle are pivotable and thereby the ratio of the radii of the running circles of both at the same speed driven drive pulleys on the output members assigned to them are always proportional to the ratio of the assigned Behave in the radius of the winding.

109851/0378

While thus known rewinder, in which, for example One link of the infinitely variable friction gear is formed by a conical surface, a special guide gear require the difference between the course of the speed ratio of the two friction gears during rewinding and to compensate for the required course of the speed ratio of the winding rollers, in the case of the invention Rewinder such a «special correction device can be omitted because here the friction gears because of their spherical segment conveyors Migen Abtxiebsglieder have the same course of the speed ratio as the winding rollers during rewinding with constant path speed.

In the drawing, an exemplary embodiment is one Unirollers according to the invention shown.

Fig. 1 shows a vertical section through a rewinder along the line I-I of Fig. 2,

Fig. 2 shows a plan view of the rewinder, the

3-5 show, purely schematically, various operating states during the rewinding process, and

Fig. 6 serves to explain the geometry. ■ - 5 -

109851/0378

The web of material to be rolled over is denoted by B. she will from a first driven winding roller la to a second driven winding roller Ib and vice versa rolled over and in known way between the two rollers by a treatment liquid located in a trough, not shown passed through. It is guided around a pendulum roller 31 which is attached to one arm of a lever 32, whose pivot point is at 33. The desired tension of the web B between the two winding rollers la and Ib is adjustable by a cylinder unit 34 acting on the lever 32.

The current radii on the two winding rollers la and Ib wound web B are denoted by Ra and Rb.

The two winding rollers la and Ib are driven by one for both common motor 35 of the bevel gears 36, 37 drives a shaft 38. On this shaft 39 sit two identical Drive pulleys 2a and 2b, which each form a link of two friction gears for driving the rollers la and Ib. Any of these Drive pulleys 2a, 2b cooperate with an output member 3a or 3b, which has the shape of a spherical segment. At the Inner surface of each spherical segment is attached to a radial axis 4a or * 4b, in such a way that these two Axes lie in a plane that also contains ifeÜe 3Ö. In Fig. 1 this plane coincides with the plane of the drawing.

- 6 109851/0378

These. Axes 4a and 4b each run in a tube 5a or 5b and are rotatably mounted therein in bearings 6a and 6b, respectively. the Pipes 5a and 5b are each passed through a pipe 7a and 7b (Fig. 2) carried, whose central axis goes through the center of the output member 3a or 3b concerned. The two pipes 7a and 7b are rotatably mounted in the frame 39 (FIG. 2) of the device shown, so that the two output members 3a and 3b are pivotable about their diameter perpendicular to the aforementioned plane containing the drive pulley shaft 38.

In the tubes 7a and 7b is also in bearings 9a and 9b each a shaft Ba or 8b is mounted on which a bevel gear 10a or lOb is seated with a seated on the axis 4a or 4b Bevel gear 11a or 11b meshes. The two shafts 8a and 8b each stand in with one of the two winding rollers Is and Ib Drive connection.

The tube 7b also carries outside the output member 3b a toothed segment 40 with which a worm 41 of a regulator 42 meshes. By both output members 3a and 3b The rod 43 connecting one another can thus adjust the pivot position of the two ball segments about their pivot axes by means of the controller 42 (7a or 7b) can be changed by the same angle, and thus, as will be explained later, the respective running circle of the traction sheaves 2a and 2b on their ball segment 3a or 3b.

109851/0378

The controller 42 is operated in a known manner via a linkage 44 engaging the lever 32.

Requirement for an even tension and speed * - The speed of the web B as it passes through the treatment liquid during the wrapping process is a change the drive speed of the rollers la and Ib accordingly the changing radii Ra and Rb of the material on these rollers. The speed is only at that point in time for both winding rollers the same, in which exactly the half of the web B wrapped from one to the other winding roller became »i.e. in which Ra-Rb is. This situation is shown in Fig. 3. The basic setting of the rewinder must therefore be carried out in such a way that at the desired web tension in, this situation both reels at the same speed are driven. This assumes that at this point in time the running circle of the traction sheave 2a on the The spherical segment 3a assigned to it is the same as the running circle of the traction sheave 2b on its spherical segment 3b. The radii of the current running circles are shown in the figures with r and r,

draws. These running circle radii change with the respective pivot position of the ball segments 3a and 3b about theirs Pivot axes 7a and 7b, according to the equation

2 2 = const,

r + r.
away

109 8 51/0378

From Fig. 6, both for the sake of simplicity Ball segments are shown congruent, it can be seen that. this equation is fulfilled when the traction sheaves 2a and 2b are arranged on their spherical segment in such a way that the radius of dex pivot axis of the output member concerned to the point of contact of the traction sheaves 2a or 2b in the plane containing the traction sheave axis with the perpendicular from the pivot axis on the traction sheave axis in this plane with one friction gear an angle of + 45 and with the other friction gear includes one of -45 and at the same time both spherical segments 3a and 3b are pivoted into the position in which their axis of rotation is perpendicular to the shaft 38 of the drive pulleys 2a, 2b. This situation is shown in FIG.

The sum of the volume of each point in time on the The good located on winding rollers la and Ib is always constant and equal to the total volume of the wrapped goods,

V + V. = constant. (1)

a u

The end faces of each on the Winding rollers located lap constant:

F _a + F _b = (R ^ + Rj% TT = constant (2)

2?

or R + Rf; = constant (2 ')

away

. Since the selected goods speed remains constant, the following results at all times:

- 9 109851/0378

V = 2 TT R. η (3)

a a i

V = 2 TT R,. η. . (4)

b b

R - V TT. η
a a 2 R, = V TT. ⁿ b D. 2

where η is the current speed of the left winding roller

and n, the current speed of the right winding roller

(Fig. 3). From this it follows

2 DD. n ~

which when inserted into equation (2 ¹ ) results in i

, V χ 2 «L.-. t ^V \ ^{2 l}
2 TT ' ^ T 2 TT' ~ 2 ~ ⁼

ⁿ b
or, if V = constant

—R "+ —r ~ = constant (5)

η η.

away

In the inventive gear, the shaft 38 is with a Speed η driven. The diameter d of the friction disks

ο Ο

2a and 2b are also constant «

The instantaneous peripheral speed in the two contact points A of the output member 3a and A ^{1 of} the output member 3b (FIG. 6) are the same and amount to j

- 10 -

100811/0371

The resulting current number of revolutions for the output member 3a is:

V ₀ = 2 r; . n ^ (6)

and for the output member 3b

V _o . -2 r ' _b . n _b (7)

But since the output members directly or via a gear with a fixed reduction ratio with the winding rollers la and Ib are connected, write:

for output link 3a:

V = f. η. r, "»

ο a a (BJ

for output link 3b:

V _o = f. n _b . r _D (9)

The following also applies with the same winding radii R and R. (Fig. 6): Δ A B C = Δα · BC

From which follows:

r ² + r ² β constant (ID)

away

For every other 5 pivot position of the ball segments 3a and 3b the following applies (Fig. 6):

_Λ . ν
Δ AB ¹ C = JX A «B ^M C

and it

r ' ² + r' ² = constant (11)

away

- 11 -

109851/0378

Al

Any change in the speed of the goods as a result of increasing and decreasing winding diameters on one of the winding rollers Winding diameter on the other roller during the rewinding process influences the pendulum roller 31 and raises it «This upward movement is controlled by the lever 32 and the linkage 44 Controller 42 supplied and the deviation from the setpoint of the Worm 41 via the tooth segment 40 to pivot the spherical segment 3b about the axis 7b and via which the. Spherical segments 3a, 3b connecting rod 43 of the spherical segment 3a evaluated at the same angle.

In Fig. 4 the one extreme situation is shown in which the winding roller Ib is almost empty wound and practically the whole web is on the winding roller la.

In Fig. 5, the reverse situation is shown when the Roller Io is almost empty.

Used for (8)

and for (9)

r '= ^ o (B')

^b f. η

r '=

■%

written and inserted into the equation (10), then gives

yourself: 1 1

2 + 2 = constant η η,
away

- 12 '-

109851/0378

From this it can therefore be seen that the inventive Transmission fully meets the requirement for constant speed, as mentioned in equation (3).

To pivot the output members 3a, 3b could, instead the means used in the example shown consisting of pendulum roller 31 and regulator 42, a differential gear, be connected between the axis of rotation of a winding roller and that of the associated output member.

- 13 -

IQS 8 51/0378

Claims (5)

PATENT CLAIMS 1. Rewinder for one or more wrapping of web-like material from one driven winding roller to another driven winding roller, and vice versa, the rewinding drive being carried out by a motor via a continuously variable friction gear assigned to each winding roller and for the automatic control of the friction gear according to A regulator controlled by the change in web length between the winding rollers is used for the progressive winding process, characterized in that each of the two identical friction gears (2a, 3a or 2b, 3b) is formed by a drive pulley (2a or, 2b) and one formed by a spherical segment Output member (3a or 3b) is formed, which is pivotable about the geometric axis (7a or 7b) of the spherical segment, which is perpendicular to a plane containing the drive pulley axis, and is rotatable about an axis (4a or 4b) lying in this plane, the Pre-axles (4a, 4b) of both output members are always guided in parallel and the point of contact z between the drive pulley and the drive pulley in both friction gears is selected so that the radius from the pivot axis of the output member to this * point of contact in the mentioned plane with the vertical connection of the pivot axis and drive pulley axis in this plane b / 'gin * a friction gear an angle of + 45 and with the other friction gear; includes one of -45, and that djyEish /. uem iiegier {42) the two output links according to Massga.be dig§ - 14 - pivotable by the Bshn by an equal angle and thereby the ratio of the radii (r or r,) of the running circles away both traction sheaves driven at the same speed on the output members assigned to them are always proportional behave to the ratio of the assigned radii of the winding. 2. Rewinder according to claim 1, characterized in that a pendulum roller (31) is used to control the regulator (42). 3. rewinder according to claim 1, characterized in that, connected between the rotation axis of a winding roller and the axis of rotation of the associated output member that the encryption \ pivoting of the output members is effected by a differential gear. 4. Rewinder according to claim 1, characterized in that the pivot axes (7a, 7b) of the output members (3a, 3b) are designed as tubes in which a shaft (8a, Bb) is rotatably mounted, which forms the take-off shaft of the friction gear and via bevel gears (10a, ll.a or IGb, lib) with the axis of rotation (4a, 4b) of the output member \ k, 5. Rewinder according to claim 4, characterized in that the axis of rotation (4a, 4b) of each output member is rotatable in a tube (5a, 5b) is mounted, which is carried by the pivot axis forming the tube (7a7b) is. For; Maschinenfabrik Benninger AG - 15 - 10 9 8 51/0378 Blank page