Spinning machine equipped with a belt tensioning system

Abstract

The spinning machine (1) has a plurality of spindles (6) aligned in the longitudinal direction. 1 ~6 n , 8 1 ~8 n ) and electric motor (181~18 n , 201-20 n The machine includes a drive for the spindle, the drive having a belt (14) that engages an electric motor and pulls the spindle tangentially, thereby rotating the spindle, an infeed direction changer (32) for diverting the belt from the spindle toward the motor, and an outfeed direction changer (34) for diverting the belt from the motor toward the spindle. The main infeed direction (Wi) and the infeed direction (Y) form an infeed angle (A), and the main outfeed direction (Wu) and the outfeed direction (Z) form an outfeed angle (B). The infeed angle (A) is greater than the outfeed angle (B) to limit the belt tension acting on the infeed direction changer (32).

Description

[Technical Field]

[0001] The subject of this invention is a spinning machine for a spinning line that produces bobbins of spun yarn from bobbins of roving yarn.

[0002] As is well known, a spinning machine can stretch and twist roving, then process the roving bobbins to obtain bobbins for spun yarn. [Background technology]

[0003] For this purpose, the spinning machine consists of a bridge extending along a longitudinal axis suspended from bobbins of roving yarn, a drawer consisting of a set of cylinders positioned below the bridge, through which the roving yarn is drawn, and having longitudinal extensions, and a bank in a line along the longitudinal axis that carries spindles and rotates around a vertical axis on which the drawn and twisted yarn is wound.

[0004] To increase the productivity of a spinning machine, it typically has two opposing banks, each equipped with a row of spindles.

[0005] The spindle is rotated around a vertical axis by a belt drive system, and the belt is driven by an electric motor and engages with the spindles of two banks.

[0006] Many solutions exist for drive mechanisms for spinning machines.

[0007] Examples are described in International Publication No. 2009 / 040734, International Publication No. 2009 / 040839, and European Patent Application Publication No. 0400260, all by the same applicant. In particular, International Publication No. 2009 / 040734 presents a solution with a different configuration of the spindle drive, thereby ensuring that the belt feed and feed portions do not come into contact with the spindle, as described below. Other solutions are described in U.S. Patent No. 5,590,514, U.S. Patent No. 4,944,144, International Publication No. 2007 / 039260, and German Patent Application Publication No. 2125597. [Overview of the project] [Problems that the invention aims to solve]

[0008] However, the current trend in this field is to provide banks with a very large number of spindles in order to increase the productivity of the spinning line. Therefore, there is a need for a spindle drive system that is effective in driving a large number of spindles, and in particular, it is desirable to overcome the problem of the tension difference that occurs in the belt between the branch and the loosened branch under the tension pulled by the motor.

[0009] The object of the present invention is to provide a spinning machine equipped with a belt drive device for a spindle that satisfies the above requirements and overcomes the above-mentioned problems. [Means for solving the problem]

[0010] This objective is achieved by the spinning machine described in claim 1. The claims describe further advantageous embodiments. [Brief explanation of the drawing]

[0011] Features and advantages of the spinning machine according to the present invention are provided by non-limiting examples, as described below and with reference to the accompanying drawings. [Figure 1] Figure 1 is a diagram of a spinning machine equipped with a belt drive device for a spindle according to one embodiment of the present invention. [Figure 2] Figure 2 shows details of the drive mechanism shown in Figure 1. [Figure 3] Figure 3 shows a group of support structures for a belt drive device according to one embodiment of the present invention. [Modes for carrying out the invention]

[0012] Referring to the attached drawings, reference numeral 1 denotes a spinning machine for a spinning line configured to obtain bobbins of spun yarn from bobbins of roving yarn, and includes a bridge extending along a longitudinal axis X from which bobbins of roving yarn are suspended; a drawer device located below the bridge, through which roving yarn is drawn, comprising a set of connected cylinders, either continuous or in sections, having longitudinal extensions; and a bank carrying spindles in a line along the longitudinal axis, rotating about a vertical axis from which the drawn and twisted yarn is wound.

[0013] Preferably, the spinning frame 1 comprises two opposing banks 2, 4, and along these banks 2, 4, each group of spindles 6 is arranged longitudinally between the spinning machine head 10 and tail 12. 1 ~6 n , 8 1 ~8 n It is positioned there.

[0014] The spinning machine 1 further includes at least one drive device for rotating the spindle around its vertical axis.

[0015] The drive unit includes a belt 14 arranged along a closed path, which includes a first portion 16a along a first bank 2, a second portion 16b along a second bank 4, a head portion 16c that connects the first and second portions to the head 10 of the spinning machine, and a tail portion 16d that connects the first and second portions to the tail 12 of the spinning machine.

[0016] Along the first portion 16a of the path, the belt 14 is on the spindle 6 of the first bank 2 1 ~6 ncontacting and along a second portion 16b of the path, the belt 14 contacts the spindles 8 of the second bank 4 1 ~8 n rotating each spindle about its respective vertical axis.

[0017] The drive further comprises at least one electric motor for driving the belt 14, for example, according to a preferred embodiment, the drive comprises a plurality of electric motors 181~18 n 、201~20 n provided.

[0018] For each motor 181~18 n 、201~20 n to engage, the belt 14 moves along an engaging portion 22 of the closed path, the engaging portion 22 including a tensioned portion 24 extending from the first portion 16a or the second portion 16b towards the motor, a pulling portion 26 wound around the drive pulley of the motor, and a relaxation portion 28 from the motor towards the first portion 16a or the second portion 16b.

[0019] For example, when the clockwise direction of the motor is defined, the tensioned portion 24 is pulled by the motor.

[0020] To deflect the belt 14 from the engaging portion 22 to the first portion 16a or the second portion 16b of the closed path, the drive comprises a pair of deflection means 30 including, for example, a feed direction changing roller 32 which is an example of a feed (infeed) direction changing means (deflection means), and a discharge direction changing roller 34 which is an example of a discharge (outfeed) direction changing means.

[0021] For example, the feed direction changing roller 32 deflects the first portion 16a of the path inwards, i.e., towards the tensioned portion 24, while the discharge direction changing roller 34 deflects the discharge portion 28, i.e., towards the first portion 16a.

[0022] The tension-subtracted portion 24 of the engaging portion 22 is typically linear and extends along the feeding direction Y, and the first portion 16a has a typically linear feeding portion 16a' in which the belt is in contact with at least some of the spindles before being directed inward, i.e., upstream of the feeding direction changing means, and the feeding portion 16a' extends along the main feeding direction Wi.

[0023] Similarly, the relaxation portion 28 of the engagement portion 22 is typically linear and extends along the feed direction Z, and the first portion 16a has a typically linear feed portion 16a'' which, after being directed outward, i.e., downstream of the feed direction changing means, the belt is in contact with at least some of the multiple spindles, and the feed portion 16a'' extends along the main feed direction Wu.

[0024] The feeding direction Y of the tension-reduced portion 24 forms a feeding angle A with the main feeding direction Wi of the feeding portion 16a' of the belt 14's path, and similarly, the delivery direction Z of the relaxation portion 28 forms a delivery angle B with the main delivery direction Wu of the delivery portion 16a'' of the belt 14's path.

[0025] In the illustrated solution, the motor rotates clockwise (the belt tension in the tension-lower portion 24 is greater than the belt tension in the relaxation portion 28), and the feed angle A is greater than the feed angle B in order to reduce the effect of belt tension on the feed direction changing means, for example, on the first direction changing roller 32.

[0026] Advantageously, this reduces the effect of the belt 14 on the feed roller 32, which is an overload in conventional solutions, and at the same time increases the effect of the belt tension on the discharge roller 34, which reduces the tension in conventional solutions.

[0027] According to a preferred embodiment, the drive unit comprises at least one motor 181-18 n , 201~20 nIt comprises at least one support group 40 suitable for movably supporting the structure.

[0028] For example, the drive unit, the spindle 6 of the first bank 6 1 ~6 n First motor 181-18 that engages with n And the spindle 8 of the second bank 8. 1 ~8 n Second motors 201-20 that engage with n It is equipped with [the following].

[0029] The first motor and the second motor are arranged side by side and supported by the support group 40.

[0030] Preferably, the support group 40 includes a plate 42 that supports the motor and is rotatable about a plate axis 44, the plate axis being positioned between the first motor and the second motor in the longitudinal direction. The plate may be fixed at a predetermined angular position.

[0031] Preferably, the support group includes, for example, an arch-shaped slot 46 formed on or through the plate 42, where the guide pin 48 slides.

[0032] For example, the support group 40 includes at least one bar that rotatably supports the plate 42, and for example, the support group 40 includes a pair of short-direction support bars 50, 52 that rotatably support the plate 42.

[0033] Advantageously, the rotation of the plate 42 allows the belt 14 to be loosened, particularly at the engaging portion 22, in order to adjust the belt tension or perform maintenance work, especially to replace a damaged belt with a new endless belt or to replace a drive pulley with another pulley of a different diameter.

[0034] Innovatively, the spinning machine according to the present invention overcomes the shortcomings described with reference to the prior art, and in particular, enables a more appropriate reduction of belt tension on more force-sensitive components than the solutions of the prior art.

[0035] To satisfy the associated requirements, it will be apparent to a person skilled in the art that modifications to the spinning machine described above can be made, which fall within the scope of protection defined by the following claims.

Claims

1. A spinning machine (1) in a spinning line for forming bobbins of spun yarn from bobbins of roving yarn, Multiple spindles (6 １ ~6 ｎ ,8 １ ~8 ｎ ) comprising at least one bank (2, 4) arranged in the longitudinal direction, at least one electric motor (18 １ ~18 ｎ , 20 １ ~20 ｎ A drive device for the spindle comprising, A belt (14) engages with the electric motor and rotates the spindle by pulling it tangentially, A means (32) for changing the feeding direction to redirect the belt from the spindle towards the motor, The system includes a means (34) for changing the direction of the belt to bypass the motor toward the spindle, With respect to the feeding direction of the belt (14), Upstream of the feeding direction changing means, the belt (14) contacts at least some of the plurality of spindles to move the feeding portion (16a') along the main feeding direction Wi; Between the feeding direction changing means and the motor, the belt (14) moves the tensioned lower portion (24) along the feeding direction (Y); Downstream of the feed direction changing means, the belt (14) contacts at least some of the plurality of spindles to move the feed portion (16a'') along the main feed direction Wu; Between the motor and the feeding direction changing means, the belt (14) moves the relaxation portion (28) along the feeding 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); The feeding angle (A) is greater than the feeding angle (B), limiting the tension of the belt to act on the feeding direction changing means. The at least one drive device includes a group of supports (40) suitable for movably supporting at least one motor, The support group (40) is rotatable around a plate axis (44) parallel to the rotation axis of the motor, The rotation axis of the motor and the rotation axis of the spindle are parallel. It comprises two opposing banks (2, 4), and the belt (14) engages with the spindles (61 to 6n) of the first bank (2) and the spindles (81 to 8n) of the second bank (4). The spinning machine (1) of a spinning line comprises at least one drive unit, a first motor (181 to 18n) that engages with the spindles (61 to 6n) of the first bank (2), and a second motor (201 to 20n) that engages with the spindles (81 to 8n) of the second bank (4), wherein the first motor and the second motor are supported adjacent to the support group (40).

2. The spinning machine according to claim 1, wherein the support group (40) includes a plate (42) that supports the motor, which is rotatable about the plate axis (44) positioned between the longitudinal directions of the first motor and the second motor and can be fixed at a predetermined angular position.

3. The spinning machine according to claim 2, wherein the support group includes means for guiding the rotation.

4. The spinning machine according to claim 3, wherein the means for guiding the rotation includes an arched slot (46) formed on or through the plate (42) through which a guide pin slides.

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