CN112805422B - Spinning machine with belt tensioning system - Google Patents

Abstract

Spinning machine (1) comprising a plurality of spindles (6 ₁ ‑6 _n ；8 ₁ ‑8 _n ) And a drive device for said spindle, which drive device comprises an electric motor (18 ₁ ‑18 _n ；20 ₁ ‑20 _n ) A belt (14) engaging the motors and pulling the spindles tangentially to rotate the spindles, a feed diverting device diverting the belt from the spindle toward the motors, and a discharge diverting device diverting the belt from the motors toward the spindles. Main feed direction (W) _i ) And a feed direction (Y) forming a feed angle (A), and a main discharge direction (W) _u ) And the discharge direction (Z) form a discharge angle (B). The feed angle (a) is greater than the discharge angle (B) to limit the effect of belt tension on the feed steering device.

Description

Spinning machine with tensioning system

technical field

The subject of the invention is a spinning machine of a spinning line for the production of yarns from coils of roving.

Background technique

It is known that spinning machines are capable of processing coils of roving to obtain coils of yarn after drawing and twisting the roving.

For this purpose, the spinning machine consists of a bridge extending along the longitudinal axis on which coils of roving are suspended; a drafting device placed under the bridge consisting of a set of columns extending longitudinally shaped members between which the roving passes to be drafted; and a creel supporting a plurality of spindles arranged in rows along the longitudinal axis and rotating about their own vertical axes on which the winding There are yarns that have been drawn and twisted.

In order to increase the productivity of the spinning machine, the spinning machine usually has two opposing creels, each of which is provided with a row of spindles.

These spindles are rotated about a vertical line by means of a belt drive device, wherein the belt is driven by an electric motor and engages the spindles of the two creels.

There are several proposals related to drive devices for spinning machines.

Such embodiments are described in international applications WO-A1-2009/040734 and WO-A1-2009/040839 and publication EP-A1-0400260, all in the applicant's name. In particular, document WO-A1-2009/040734 shows a solution of a spindle drive device with a different configuration whereby the outfeed and infeed sections of the belt, as described below, are not in contact with the spindles. Other solutions are described in documents US 5,590,514, US 4,944,144, WO-A1-2007/039260 and DE 2125597.

However, the current trend in the industry is to provide creels with very many spindles in order to increase the productivity of the spinning line. Therefore, a need is felt to provide a drive device for spindles which is effective for driving a large number of spindles, in particular overcoming the problem of creating a tension difference between the slack branch of the belt and the tensioned branch drawn by the motor.

Contents of the invention

The object of the present invention is to obtain a spinning machine with a belt drive device for the spindles, which fulfills the aforementioned requirements and overcomes the aforementioned problems.

This object is achieved by a spinning machine of a spinning line. The spinning machine for forming a plurality of coils of yarn from a plurality of coils of roving, the spinning machine comprising: at least one creel equipped with a plurality of spindles aligned longitudinally; at least one drive device comprising at least one electric motor, a belt engaging with said motor and pulling said spindle tangentially to rotate said spindle, a belt diverting said belt from said spindle towards said motor an infeed diverter and an outfeed diverter diverting the belt from the motor towards the spindle, wherein the direction of feed with respect to the belt is as follows: upstream of the infeed diverter, the belt and At least some of the plurality of spindles travel in contact along a main feed direction through a feed section; between the feed diversion device and the motor, the belt travels in the feed direction through a tensioned section; downstream of the discharge turning device, the belt travels through the discharge section along the main discharge direction in contact with at least some of the plurality of spindles; between the motor and the discharge Between diverting devices, the belt travels through the relaxation section in the outfeed direction; the main infeed direction and the infeed direction form an infeed angle, and the main outfeed direction and the outfeed direction form a Outfeed angle; said infeed angle is greater than said outfeed angle to limit the effect of said belt tension on said infeed diverter.

Description of drawings

The characteristics and advantages of the spinning machine according to the invention will be apparent from the description given below, provided by means of non-limiting examples, and from the accompanying drawings, in which:

- Figure 1 shows a schematic diagram of a spinning machine comprising a belt drive device for a plurality of spindles according to an embodiment of the invention;

- Figure 2 shows details of the drive device in Figure 1; and

- Figure 3 shows a support group for a belt drive device according to an embodiment of the invention.

Detailed ways

With reference to the accompanying drawings, reference numeral 1 generally designates a spinning machine of a spinning line suitable for obtaining coils of yarn from coils of roving, comprising: a bridge extending along a longitudinal axis X, Suspended from the bridge are rolls of roving; placed below the bridge, the drafting device consists of a series of continuous or segmented and longitudinally extending coupling columns between which the roving is passed to be drawn; and a creel supporting a plurality of spindles arranged in rows along a longitudinal axis and rotating about their own vertical axis, to which the drawn and twisted thread is wound.

Preferably, the spinning machine 1 comprises two opposing creels 2, 4 along which longitudinally aligned spindles 61-6n, 81- The corresponding group of 8n.

The spinning machine 1 also comprises at least one drive device for driving the spindles in rotation about their own vertical axis.

Said driving device comprises a belt 14 arranged along a closed path comprising a first section 16a along the first creel 2, a second section 16b along the second creel 4, the spinning machine A head section 16c combining the first section and the second section at the head 10 of the spinning machine and a tail section 16d combining the first section and the second section at the tail 12 of the spinning machine.

Along the first section 16a of the path, the belt 14 is tangent to the spindles 61-6n of the first creel 2; along the second section 16b of the path, the belt 14 is tangent to the spindles 81-8n of the second creel 4. so that each spindle rotates about its respective vertical axis.

The drive device also comprises at least one electric motor for driving the belt 14 ; eg, according to a preferred embodiment, the drive device comprises a plurality of motors 181 - 18n , 201 - 20n preferably arranged in the path of the belt 14 .

To engage each motor 181-18n, 201-20n, the belt 14 travels through the engagement section 22 of the closed path; , the tension section extends from the first section 16a or from the second section 16b towards the motor, the traction section is wound on the drive wheel of the motor, and the slack section is from the motor towards the first section 16a or the second section 16b extension.

For example, tensioning section 24 is pulled by the motor when the motor is defined to rotate in a clockwise direction.

In order to divert the belt 14 from the joining section 22 to the first section 16a or the second section 16b of the closed path, the drive apparatus includes diverting means, such as a pair of diverters 30 comprising, for example, a feed diverter. Roller 32 and discharge diversion roller 34, wherein, feed diversion roller is the embodiment of feed diversion device, and discharge diversion roller is the embodiment of discharge diversion device.

For example, feed diverting rollers 32 divert first section 16a of the path inwardly (i.e., toward tensioning section 24), while outlet diverting rollers 34 divert outlet section 28 (i.e., toward first zone Section 16a turns).

The tensioning section 24 of the joining section 22 is generally straight and extends along the feed direction Y; the first section 16a has a feed section before turning inwards (ie upstream of the feed diversion device) 16a', the generally straight feed section along which the belt is in contact with at least some of the plurality of spindles; said feed section 16a' extends along the main feed direction Wi .

Similarly, the slack section 28 of the joining section 22 is generally straight and extends along the discharge direction Z; the first section 16a has a discharge zone after turning outwards (i.e. downstream of the discharge diversion device) Section 16a", the discharge section is generally straight, along which the belt is in contact with at least some of the plurality of spindles; said discharge section 16a" is along the main discharge direction Wu extend.

The feed direction Y of the tensioning section 24 forms a feed angle A with the main feed direction Wi of the feed section 16a' of the path of the belt 14; The main discharge direction Wu of the discharge section 16a" of the path forms the discharge angle B.

In the arrangement shown, where the rotation of the motor is clockwise (belt tension in tension section 24 is greater than belt tension in slack section 28), the feed angle A is greater than the discharge angle B, thereby reducing The effect of the tension of the belt on the feed turning device (for example, on the first turning roller 32) is understood.

Advantageously, this allows reducing the action of the belt 14 on the feed roller 32, which is overloaded in prior art solutions; while increasing the action of the tension of the belt on the outfeed roller 34, And in the scheme of prior art, the tension force of belt is load less to the effect of discharge roller.

According to a preferred embodiment, the drive device comprises at least one support group 40 adapted to movably support at least one electric motor 181-18n, 201-20n.

For example, said driving means comprise first electric motors 181 - 18 n engaged with the spindles 61 - 6 n of the first creel 6 and second electric motors 201 - 20 n engaged with the spindles 81 - 8 n of the second creel 8 .

The first motor and the second motor are side by side and supported by said support group 40 .

Preferably, the support group 40 comprises a plate 42 supporting said motors and being rotatable about a plate axis 44; said plate axis being arranged longitudinally between the first and the second motor. The plate can be locked in a predetermined angular position.

Preferably, said support group comprises means for guiding rotation comprising, for example, arched slots 46 made on or through the plate 42, in which guide pins 48 slide .

For example, support group 40 includes at least one rod to rotatably support plate 42 ; for example, support group 40 includes a pair of longitudinally spaced lateral support rods 50 , 52 that rotatably support plate 42 .

Advantageously, the rotation of the plate 42 allows the belt 14 to relax, especially at the junction section 22, in order to adjust the tension of the belt or to perform maintenance operations, in particular to replace a broken belt with a new endless belt, or with another of a different diameter. The drive wheel replaces the drive wheel.

Innovatively, the spinning machine according to the invention overcomes the drawbacks mentioned with regard to the prior art, in particular allowing the spinning machine to reduce the tension of the belt to the components in a suitable manner, whereas in the solutions of the prior art the belt The tension on the component is the greater load.

Obviously, the spinning machine described above can be modified by a person skilled in the art in order to meet possible needs, within the scope of protection defined by the claims.

Claims (7)

1. Spinning machine (1) of a spinning line for forming a multi-reel yarn from a multi-reel roving, comprising: at least one creel equipped with a plurality of spindles aligned longitudinally; and at least one drive device for the spindle, the drive device comprising at least one motor, a belt (14) engaging the motor and pulling the spindle tangentially to rotate the spindle, a feed steering device steering the belt from the spindle towards the motor, and a discharge steering device steering the belt from the motor towards the spindle, wherein the feed direction for the belt (14) is as follows:

-upstream of the feed diversion device, the belt (14) travels in contact with at least some of the plurality of spindles through a feed section (16 a') along a main feed direction (Wi);

-between the feed steering device and the motor, the belt (14) travels through a tensioning section (24) along a feed direction (Y);

-downstream of the outfeed diverting device, the belt (14) travels in contact with at least some of the plurality of spindles through an outfeed section (16 a ") along a main outfeed direction (Wu);

-between the motor and the outfeed steering device, the belt (14) travels through a slackening section (28) along an outfeed direction (Z);

-the main feeding direction (Wi) and the feeding direction (Y) form a feeding angle (a), and the main discharging direction (Wu) and the discharging direction (Z) form a discharging angle (B);

-said feed angle (a) is greater than said discharge angle (B) to limit the effect of the tension of said belt on said feed steering device.

2. Spinning machine according to claim 1, wherein said at least one driving device comprises a support group (40) adapted to support the at least one motor in a movable manner.

3. Spinning machine according to claim 2, comprising two opposite creels, wherein said belt (14) engages said spindle of a first creel (2) and said spindle of a second creel (4).

4. A spinning machine according to claim 3, wherein said at least one driving device comprises a first motor (18) engaged with said spindle of said first creel (2) ₁ -18 n) and a second electricity engaged with the spindle of the second creel (4)Motivation (20) ₁ -20 n), wherein the first motor and the second motor are side by side and supported by the support group (40).

5. Spinning machine according to claim 4, wherein the support group (40) comprises a plate (42) supporting the motors, the plate being rotatable about a plate axis (44) which is longitudinally interposed between the first and second motors and which is lockable in a predetermined angular position.

6. Spinning machine according to claim 5, wherein the support group comprises means for guiding the rotation.

7. Spinning machine according to claim 6, wherein the means for guiding rotation comprise an arched slot (46) made on or through the plate (42) in which a guiding pin (48) slides.

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