CN112805422A

CN112805422A - Spinning machine with belt tensioning system

Info

Publication number: CN112805422A
Application number: CN201980065757.XA
Authority: CN
Inventors: 罗萨里奥·阿森扎
Original assignee: Mazori Machine Textile Co ltd
Current assignee: Mazori Machine Textile Co ltd
Priority date: 2018-10-02
Filing date: 2019-09-05
Publication date: 2021-05-14
Anticipated expiration: 2039-09-05
Also published as: EP3861155A1; JP2024029225A; IT201800009103A1; EP3861155B1; JP2022503885A; CN112805422B; WO2020070567A1

Abstract

A spinning machine (1) comprising a plurality of spindles (6 _1-6 _n ; 8 _1-8 _n ) aligned longitudinally and a drive device for the spindles, the drive device comprising an electric motor (18 _1-18 _n ; 20 _1-20 _n ), a belt (14) engaging the motor and pulling the spindles tangentially to rotate these spindles, a feed diverter (32) for turning the belt from the spindle towards the motor and for turning the belt from the motor towards The output diverting device (34) for the turning of the spindle. The main infeed direction (W _i ) and the infeed direction (Y) form an infeed angle (A), and the main outfeed direction (W _u ) and the outfeed direction (Z) form a discharge angle (B). The feed angle (A) is larger than the discharge angle (B) to limit the effect of the tension of the belt on the feed turning device (32).

Description

Spinning machine with belt tensioning system

The subject of the invention is a spinning machine of a spinning line for producing a multi-turn yarn (yarn) from a multi-turn roving (roving).

Spinning machines are known that are capable of processing multiple roving turns to obtain multiple yarn turns after drafting and twisting the roving.

For this purpose, the spinning machine consists of: a bridge extending along a longitudinal axis, on which bridge a plurality of rolls of roving are suspended; a drawing device placed below the bridge, the drawing device consisting of a set of cylindrical members extending longitudinally, between which the roving passes to be drawn; and a creel supporting a plurality of spindles arranged in a row along a longitudinal axis and rotating about their own vertical axis, on which spindles a drafted and twisted yarn is wound.

In order to increase the productivity of spinning machines, they usually have two opposite creels, each provided with a row of spindles.

The spindles are rotated about a vertical line by a belt drive, wherein the belt is driven by a motor and engages the spindles of the two creels.

There are several solutions relating to drive devices for spinning machines.

Such examples are described in international applications WO-A1-2009/040734 and WO-A1-2009/040839 and in publication EP-A1-0400260, all in the name of the applicant. In particular, document WO-a1-2009/040734 shows a solution with spindle drive devices of different configuration, whereby the discharge section and the feed section of the belt as described below are not in contact with the spindles. Further variants are described in the 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 very many spindles to creels in order to increase the productivity of the spinning line. Therefore, there is a felt need to provide a drive device for spindles which is effective for driving a large number of spindles, in particular overcoming the problem of the tension difference generated between the slack branch of the belt and the tension branch pulled by the motor.

The aim of the present invention is to obtain a spinning machine with a belt drive for the spindles which meets the aforementioned requirements and overcomes the aforementioned problems.

This object is achieved by a spinning machine according to claim 1. Further advantageous embodiments are described in the various claims dependent on this claim.

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

figure 1 shows a schematic view of a spinning machine comprising a belt drive apparatus for a plurality of spindles according to an embodiment of the invention;

fig. 2 shows a detail of the drive device in fig. 1; and

fig. 3 shows a support group for a belt drive apparatus according to an embodiment of the invention.

With reference to the accompanying drawings, the numeral 1 generally designates a spinning machine of a spinning line, suitable for obtaining multiple coils of yarn from multiple coils of roving, comprising: a bridge extending along a longitudinal axis X, the bridge having a plurality of rolls of roving suspended thereon; a drafting device placed below the bridge, consisting of a set of linking cylinders, continuous or segmented and extending longitudinally, between which the roving passes to be drafted; and a creel supporting a plurality of spindles arranged in a row along a longitudinal axis and rotating about their own vertical axis, to which the drafted and twisted thread is wound.

Preferably, the spinning machine 1 comprises two

opposite creels

2, 4 along which respective groups of longitudinally aligned spindles 61-6n, 81-8n are arranged between the head 10 and the tail 12 of the spinning machine.

The spinning machine 1 further comprises at least one driving device for driving a plurality of spindles to rotate them about their own vertical axis.

The drive 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, a head section 16c joining the first and second sections at the head 10 of the spinning machine and a tail section 16d joining the first and second sections 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 apparatus further comprises at least one motor for driving the belt 14; for example, according to a preferred embodiment, the drive device comprises a plurality of electric motors 181-18n, 201-20n, preferably arranged in the path of the belt 14.

For engagement with each motor 181-18n, 201-20n, the belt 14 travels through an engagement section 22 of the closed path; the engagement section 22 includes a tension section 24 extending from the first section 16a or from the second section 16b toward the motor, a traction section 26 wound around the drive wheels of the motor, and a slack section 28 extending from the motor toward the first section 16a or the second section 16 b.

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

To divert the belt 14 from the splicing section 22 to the first or second section 16a, 16b of the closed path, the drive apparatus includes a diverting device, such as a pair of diverters 30 that include, for example, an infeed diverting roller 32 that is an embodiment of the infeed diverting device and an outfeed diverting roller 34 that is an embodiment of the outfeed diverting device.

For example, the feed turning rollers 32 turn the first section 16a of the path inward (i.e., toward the tensioning section 24), while the outfeed turning rollers 34 turn the outfeed section 28 (i.e., toward the first section 16 a).

The tensioning section 24 of the engagement section 22 is generally straight and extends along the feed direction Y; the first section 16a has a feed section 16a' prior to the inward turn (i.e., upstream of the feed turn device), which is generally straight, along which the belt contacts at least some of the plurality of spindles; the feeding section 16a' extends along a main feeding direction Wi.

Similarly, the slack section 28 of the engagement section 22 is generally straight and extends along the outfeed direction Z; the first section 16a, after turning outward (i.e., downstream of the outfeed turning device), has an outfeed section 16a "that is generally straight along which the belt contacts at least some of the plurality of spindles; the discharge section 16a ″ extends along the main discharge direction Wu.

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; similarly, the discharge direction Z of the relaxation section 28 forms a discharge angle B with the main discharge direction Wu of the discharge section 16a ″ of the path of the belt 14.

In the illustrated version, where the motor rotation is clockwise (the tension of the belt in the tension section 24 is greater than the tension of the belt in the relax section 28), the infeed angle a is greater than the outfeed angle B, thereby reducing the effect of the belt tension on the infeed diverter device (e.g., on the first diverter roller 32).

Advantageously, this allows reducing the effect of the belt 14 on the feed rollers 32, which in the solutions of the prior art is overloaded; while increasing the effect of the belt tension on the exit roller 34, which in prior art solutions is less loaded.

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, 201-20 n.

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

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

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

Preferably, said support group comprises means for guiding the rotation, which comprise, for example, an arched slot 46 made on or through the plate 42, in which a guide pin 48 slides.

For example, support set 40 includes at least one lever to rotatably support plate 42; for example, the support set 40 includes a pair of longitudinally spaced apart

transverse support bars

50, 52 that rotatably support the plate 42.

Advantageously, the rotation of the plate 42 allows the belt 14 to slacken, in particular at the engagement 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 to replace the drive wheel with another drive wheel of a different diameter.

Innovatively, the spinning machine according to the invention overcomes the drawbacks mentioned with reference to the prior art, in particular allowing it to reduce the belt-to-component tension in a suitable manner, whereas in the solutions of the prior art the belt-to-component tension is heavily loaded.

Obviously, in order to satisfy contingent needs, a man skilled in the art can modify the above-described spinning machine, including within the scope of protection defined by the claims.

Claims

1. Spinning machine (1) of a spinning line for forming a plurality of rolls of yarn from a plurality of rolls of roving, comprising: at least one creel (2, 4) equipped with a plurality of spindles (61-6 n; 81-8n) aligned longitudinally; and at least one drive device for the spindles, the drive device comprising at least one electric motor (181-18 n; 201-20n), a belt (14) engaged with the electric motor and drawing the spindles tangentially to rotate the spindles, a feed diverting device (32) diverting the belt from the spindles towards the electric motor, and a discharge diverting device (34) diverting the belt from the electric motor towards the spindles, wherein with respect to a feeding direction of the belt (14) the following are provided:

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

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

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

-between the electric motor and the outfeed steering device, the belt (14) travels through a slack 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 infeed angle (a) is greater than said outfeed angle (B) to limit the effect of the tension of the belt on the infeed diverter device.

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

3. Spinning machine according to claim 1 or 2, comprising two opposite creels (2, 4), wherein the belt (14) engages the spindles (61-6n) of a first creel (2) and the spindles (81-8n) of a second creel (4).

4. Spinning machine according to claim 3 when depending on claim 2, wherein said at least one driving device comprises a first motor (181-18n) engaged with the spindles (61-6n) of the first creel (2) and a second motor (201-20n) engaged with the spindles (81-8n) of the second creel (4), wherein said first and second motors are side by side and supported by said support group (40).

5. Spinning machine according to claim 4, wherein the support group (40) comprises a plate (42) supporting the motors, which is rotatable about a plate axis (44) 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 the rotation comprise an arched slot (46) made on or through the plate (42) in which a guide pin (48) slides.