EP2107143A2 - Bobbin or tube holder for a bobbin or tube transport device on a textile machine - Google Patents

Abstract

The spool or sleeve support has a pin (33) for receiving an empty sleeve or a bobbin, where the pin is arranged on a base body (32). A sliding spacer is applied on a support lower side (30) by high abrasion resistance and high conductivity in a partial or holohedral manner. The sliding spacer is made of thermoplastic plastics, particularly polyamide. The base body or the pin is made of a thermoplastic plastic such as a polyester, particularly polybutylene terephthalate or polyethylene terephthalate.

Description

The invention relates to a bobbin or sleeve carrier for a bobbin and tube transport system on a textile machine, wherein the bobbin or sleeve carrier comprises a pin arranged on a base for receiving an empty sleeve or a bobbin, and the base body includes a carrier base, with which the Coil or sleeve carrier directly or indirectly slidably rests on the support surface of a conveyor track of the transport system.

Coil or sleeve transport systems for the removal of the cops or the coils of and for feeding empty tubes to textile machines, such as spinning machines or winders, are well known. For example, describe the EP-A-0 517 668 and the WO-A-90/03460 such transport systems. The coil or sleeve carriers are normally called peg trays, also called peg trays, which are slidably guided on conveyor tracks designed as carrier rails. Ie. the peg slides slide during their movement towards the work stations or away from the work stations on the mounting rails. The mounting rails take on at least a portion of the weight of the loaded with coils or sleeves peg slide.

The peg slides are thereby pushed or pulled over the conveyor track by means of carriers attached to a conveyor. The conveying means are, for example, belts, in particular steel belts, cables or chains, which are guided or also driven by deflection means, in particular deflection rollers. The drivers which move the pintle carriages along the conveyor track, i. push, are attached to the conveyor and are moved by this. For this purpose, each pin slide is picked up and guided by its own driver.

With increasing number of spinning stations per spinning machine and the conveyor tracks are getting longer and the number of sleeve or coil carrier is getting bigger. The conveying means must therefore be able to transport a large number of sleeve or coil carrier. Here, the designer faces two problems. On the one hand, the funding by the greater number of sleeve or

Bobbin carriers move a higher total weight along the transport path. On the other hand grow with the number of moving sleeve or coil carrier and the friction caused by the sliding guide of the sleeve or coil carrier on the conveyor track friction. In particular, the static friction when starting the transport device claimed the conveyor drive extremely strong.

The increasing load or overload of the drives leads to increased slippage and to a correspondingly increased wear on the power transmission points, z. B. between the drive wheel and conveyor belt.

In principle, the problems mentioned can be eliminated by using more powerful drives and more robust conveying equipment. However, such a procedure requires a constructive revision of the transport system with corresponding cost consequences. However, more powerful drives and more robust components make the textile machine more expensive and, moreover, lead to an increase in energy consumption, so that in addition to the manufacturing costs, the operating costs also increase.

Object of the present invention is therefore to propose a coil or sleeve carrier for a bobbin or tube transport device of a long textile machines, thanks to which without complex design measures and without increasing the power of the drives, the performance of the transport system is improved.

The object is achieved in that on the carrier base partially or full surface a sliding pad of high abrasion resistance and high lubricity is applied, which consists of a different material than the main body.

The sliding pad on the coil or sleeve carrier, hereinafter referred to simply as a slide pin, is preferably made of a thermoplastic, and more preferably of a polyamide (PA), such as PA6, PA66, PA11, PA12, PA46, PA6-G or a copolyamide or polyamide blend. The polyamides mentioned may be provided with or without additionally integrated solid lubricants or lubricant additives or have a MoS ₂ or graphite modification.

• Polyacetalharze, wie Polyoxymethylen (POM, POM-H, POM-K), mit oder ohne zusätzlich integrierten Festschmierstoffen, bzw. Gleitmittelzusätzen; bzw. mit einer MoS₂- oder Graphit-Modifikation;
• Polyethylen (PE), PE-UHMW (ultrahochmolekular), PE-HMW (hochmolekular);
• thermoplastische Polyester, wie PBT oder PET, mit oder ohne zusätzlich integrierten Festschmierstoffen, bzw. Gleitmittelzusätzen; bzw. mit MoS₂- oder Graphit-Modifikation;
• Hochleistungs-Kunststoffe, wie PI, PAI, PEEK, PAEK, mit oder ohne zusätzlich integrierten Festschmierstoffen, bzw. Gleitmittelzusätzen, bzw. mit MoS₂- oder Graphit-Modifikation;
• PTFE (Polytetrafluorethylen).

Furthermore, the following listed plastics are also suitable for sliding underlays:

• Polyacetal resins, such as polyoxymethylene (POM, POM-H, POM-K), with or without additionally integrated solid lubricants, or lubricant additives; or with a MoS ₂ or graphite modification;
• Polyethylene (PE), PE-UHMW (ultra-high molecular weight), PE-HMW (high molecular weight);
• thermoplastic polyesters, such as PBT or PET, with or without additionally integrated solid lubricants or lubricant additives; or with MoS ₂ or graphite modification;
• High-performance plastics such as PI, PAI, PEEK, PAEK, with or without additionally integrated solid lubricants or lubricant additives, or with MoS ₂ or graphite modification;
• PTFE (polytetrafluoroethylene).

Furthermore, amorphous plastics modified with lubricant additives, such as PC, PMMA, PVC-U, ABS or PS are also suitable, even if they do not necessarily achieve the excellent sliding and wear behavior of PA 66.

The peg carriage includes a body, z. B. in plate form, on which a pin for receiving sleeves or coils or cops is arranged. The main body includes a carrier base, which rests on the support surface of the conveyor track.

The conveyor track is preferably a mounting rail in the form of a sheet metal or extrusion profile made of metal, in particular of aluminum. The mounting rail forms a bearing surface for the pin slides. The support surface is preferably flat. It can be formed horizontally or inclined.

Between the bearing surface of the support rail and the journal slide, a rail support, in particular made of plastic, which forms a sliding surface for the journal slide, can be arranged.

The sliding pad of the journal slide can be one or more parts. The slide pad can enter into a cloth, force and / or positive connection with the carrier underside. Combinations of the aforementioned connection forms are therefore also possible.

The underside of the carrier may be partially or fully covered with the sliding pad.

In a preferred embodiment, the base body is a one-sided or two-sided, at least to the support surface of the conveyor path open hollow body with a preferably annular outer wall, which includes a common cavity or more by one or more webs or inner walls of separate sub-cavities, also called chambers includes ,

The sliding pad is preferably a partially or completely embedded in the cavity of the body slider. The slider is preferably formed in its outer contour opposite to the said cavity. It is fastened by means of form and / or material connection in the cavity. The slider protrudes a little at the bottom of the main body, so that the coil or sleeve carrier rests with the slider and not with its underside of the support surface. The said projection can, for. B. be 0.1 to 2 mm. The projection should not be too large, otherwise the position settings of the gripper and other components coming into contact with the trunnion would have to be changed because of the change in the height of the trunnion carriage in the case of retrofitted transport systems. Furthermore, in the case of a wear-resistant material for the sliding pad, a comparatively slight elevation of the stated order of magnitude is completely sufficient.

In a further development of the invention, the outer wall of the base body is annular. Within the annular outer wall, an annular or polygonal, self-contained inner wall is arranged, which encloses an open central cavity. The sliding pad can now be a, in the central cavity of the body partially or completely sunken slider. The slider is preferably formed in its outer contour opposite to the said cavity. It is fastened by means of form and / or material connection in the cavity. The slider protrudes a little at the bottom of the main body, so that the coil or sleeve carrier rests with the slider and not with its underside of the support surface

In a particularly preferred embodiment, the base body has an annular outer wall and an inner, preferably concentrically arranged to the outer wall, annular inner wall, which encloses an open central cavity.

The sliding pad can now be partially or completely embedded in the central cavity. Again, the slider in its outer contour is preferably formed opposite to the central cavity. It is fastened by means of form and / or material connection in the cavity.

Said sliding body may be an annular body or a solid body. The slider can be provided with radial excess, which can be introduced by radial compression in the corresponding cavity in the body and is positively trapped by radial relief of the ring body under spring back because of the restoring force in the cavity.

Furthermore, the sliding pad may be an annular slider with an annular gap and resilient properties. The slider is designed here in the functional design of an inner locking ring. That the slider is inserted by radially compressing the annular gap in a preferably circular or annular cavity in the body and and sets by radial relief of the ring body due to the restoring force of the annular leg form-fitting firmly on the inner wall of the cavity.

Alternatively to the positive connection or in addition to the positive connection can also be a material connection, for. As an adhesive bond, be provided between the body and the slider. It is also conceivable that the base body and the slider are already connected to each other during the manufacturing process. So z. B. the main body are molded in an injection molding together with the slider in a two-component injection molding. Furthermore, the sliding body can also be connected as an insert during the injection molding process for the production of the main body with this.

Furthermore, the sliding body can also be screwed into the cavity in the base body via a screw connection. The slider may also be formed conically for the purpose of producing a positive connection transverse to the radial extent. In addition, a clip or snap-in connection between the body and slider is conceivable.

In a further development of the particularly preferred embodiment of the base body, a plurality of radially inwardly spaced and spaced apart recessed connecting webs are arranged between the annular outer wall and the annular inner wall, which connect the outer wall with the annular inner wall and effect in this way a reinforcement of the structure of the base body , The sliding pad can now be an annular sliding body, which is arranged resting on the recessed connecting webs between the outer wall and the inner wall. It can now be provided both between the outer wall and the inner wall, as just described, as well as in the central cavity, as described above, a sliding body according to one of the embodiments described above. But it can also be provided at the appropriate place only a slider.

Basically, the sliding surface or the base body of the underside of the base body in each case before, so that the pin carriage rests with the sliding body of the support surface of the support rail or conveyor track. The sliding surface may be the main body, i. the outer and / or inner wall project by about 0.1 to 0.2 mm.

The main body or the entire pin slide consist of a plastic, preferably of a thermoplastic material, such as. As a polyester (PBT or PET). So z. B. the pin slide of a polyester, in particular PBT, and the sliding pad on the pin slide of a polyamide, in particular PA 66, be.

The journal slide according to the invention can be used in transport systems on spinning machines, in particular ring spinning machines, twisting machines or winding machines.

The sliding pad according to the invention on the trunnion carriage considerably reduces the friction between the conveyor track and the trunnion carriage, so that, despite an increase of moving trunnion carriages in the case of long spinning machines, no increase in the drive power is required and the energy consumption can be further optimized. Moreover, the good sliding properties, in particular the excellent dry friction properties, of the wear-resistant sliding pad are retained over a long service life.

Thanks to the sliding pad according to the invention, the friction coefficient of more than 0.4 μ, in particular 0.44 μ, can be reduced to less than 0.3 μ, in particular to 0.23 μ.

The present invention also has the advantages that the pin carrier can be equipped in a simple manner and with little technical and economic effort with a low-friction and wear-resistant sliding surface. In this case, recourse can be had to the conventional form of the trunnion carriage without having to laboriously modify it. This therefore also allows the retrofitting of countless already in circulation peg slide with a low-friction and wear-resistant sliding surface.

The following description of the invention with reference to embodiments is based on aspects related to the sleeve or coil transport to the ring spinning machine. For the sake of completeness, however, it should be mentioned that the spinning machine, or the conveyor, supplies the carriers or the coils to a "sink" and receives carriers or sleeves from a "source". The "sink" and the "source" can by a single processing unit, for. As a winder, are formed. But they can also be formed by entry or exit points of a transport system that can work automatically, semi-automatically or even hand-operated. The transport system delivers z. B. coils to predetermined or indefinite points and receives sleeves from the same or even from other places.

Fig. 1:

eine schematische Draufsicht einer Ringspinnmaschine mit einem um diese herumgeführten Endlosförderer;

Fig. 2:

einen Querschnitt durch einen auf einer Trägerschiene geführten Zapfenschlitten;

Fig. 3:

eine Draufsicht der Unterseite eines Zapfenschlittens;

Fig. 4a,b:

einen Schnitt durch einen Zapfenschlitten gemäss einer ersten Ausführungsform;

Fig. 5a, b:

einen Schnitt durch einen Zapfenschlitten gemäss einer zweiten Ausführungsform;

Fig. 6a, b:

einen Schnitt durch einen Zapfenschlitten gemäss einer dritten Ausführungsform.

The invention will be described below with reference to FIGS. 1 to 6 explained in more detail. Show it:

Fig. 1:

a schematic plan view of a ring spinning machine with a guided around this endless conveyor;

Fig. 2:

a cross section through a guided on a support rail pin slide;

3:

a plan view of the underside of a pin slide;

Fig. 4a, b:

a section through a pin slide according to a first embodiment;

Fig. 5a, b:

a section through a pin slide according to a second embodiment;

Fig. 6a, b:

a section through a pin slide according to a third embodiment.

The Fig. 1 shows a schematic plan view of a ring spinning machine 1 with a guided around the ring spinning endless conveyor. The ring spinning machine 1 has on opposite machine sides parallel to each other spinning stations groups 12a and 12b, each consisting of only schematically indicated spinning stations 11. Further details of the ring spinning machine 1, in particular the machine heads are not shown, because it is so far the usual and known arrangements. The number of spinning units 11 is reproduced greatly reduced for the sake of clarity.

To the two spinning station groups 12a, 12b is designed as an endless conveyor conveyor 21 guided around in the form of a vertically extending steel strip. The steel strip is placed around deflection rollers 13, 14, 15, 16 with a vertical axis at the two ends of the parallel and in alignment with each other spin groups 12a, 12b. Thus, there are two long stems extending along each of a group of spinning stations 12a and 12b and two short stems of the endless conveyor 21 connecting the two groups of spinning stations 12a, 12b at the ends.

On the conveyor 21 are aligned with the individual spinning stations 11, from the endless conveyor 21 outwardly extending, each one extending transversely to the conveying direction driver finger 10 having driver 8 attached. Immediately adjacent and below the endless conveyor 21 extends in the region of the spinning unit groups 12a, 12b, a horizontal support rail 6, which is guided around the left end of the ring spinning machine 1 parallel to the endless conveyor 21 according to this embodiment, to produce a transport connection between the two sides of the ring spinning machine ,

On the support rail 6 10 pin slides 2 are arranged one behind the other at a distance and in contact with the driving fingers, which according to Fig. 2 from a circular disk-shaped main body 3 (plate) and a sleeve journal arranged perpendicular thereto 4, and preferably in the region of an arranged between the sleeve pin 4 and the base body 3 widened foot 9 are engaged behind by the driving fingers 10.

On both sides of the machine are after Fig. 1 indicated by dashed lines sleeve changing devices 20, which may be formed as in classic Doffern and serve to remove from the spindles of the spinning units 11 full sleeves (cops or spools) and instead aufzustecken empty tubes on the spindles, which by means of the endless conveyor 21 to the individual spinning units eleventh have been introduced.

At one end of the spinning station groups 12a, 12b, a conveying connection (not shown) to a winding unit or a cop removing and receiving unit can be provided.

The guide rail 6 is arranged on or on the machine frame. The, preferably designed as a hollow profile guide rail 6 comprises a flat, horizontally oriented guide or support surface 7, on which a band-shaped plastic sliding pad can be arranged. The peg slide 2 is slidably guided with its arranged on the underside of the base body 3 slide pad 5 on the support surface 7 and the plastic pad thereon ( Fig. 2 ).

The pin slide 2 has between the pin 4 and the base 3 a slightly opposite the pin 4 widened foot 9, which is engaged behind by a driving finger 10. The driver finger 10 is connected via a holding arm with the carrier body 22 of the driver 8, which is fastened with fastening means on the vertical conveyor belt 21. The driver 8 is guided via guide means along the guide rail 6.

Fig. 3 shows the bottom view of a known pin slide 31 as shown in Fig. 4a . 5a and 6a is also shown in cross-sectional view. In this journal slide 31, the base body 32 is a hollow body which is open on one side, facing the bearing surface, with an annular outer wall 35 and has a lower side 30. Within the annular outer wall 34 is an annular, arranged concentrically to the outer wall and self-contained inner wall 36 is arranged, which encloses an open central cavity 29. The central cavity 29 has, to the side opposite the underside an opening through which the pin 33 is fixed to the base body 32. However, this feature is not relevant to the present invention and is therefore not intended to be limiting. Between the outer wall 35 and the inner wall 36 a plurality of radially arranged and spaced apart against each other set back inwardly connecting webs 37 are arranged (see also Fig. 4a ), which connect the outer wall 35 with the inner wall 36 and effect in this way a reinforcement of the structure of the base body 32. Consequently, only the annular inner and outer walls form the bearing surface of conventional pin slides without slide pad. Between the outer wall 35, the inner wall 36 and the connecting webs 37 hollow cavities open on one side 38 are formed.

Starting from this predetermined structure of the main body 32, three embodiments of a journal carriage 31 with slide pad 34, 54, 74 will be described below.

The first embodiment according to Fig. 4a and 4b shows the pin carriage 31 with a slider 34. The slider 34 is in the form of a circular solid body. This is completely embedded up to a front-side stop 39 in the central cavity 29 of the body 32 and sits in this form-fitting firmly. The sliding body is formed in its outer contour opposite to the central cavity, wherein the base body 32 may have a small radial excess relative to the cavity. The slider 32 is connected by means of a form and / or material connection with the base body 32.

The second embodiment according to Fig. 5a and 5b shows the pin carriage 31 with a slider 54. The slider 54 is an annular body with annular gap 59, which in its outer contour relative to the cavity 29 has a radial excess. The slider is designed here in the functional design of an inner locking ring, which is insertable by radial compression of the annular gap 59 in the annular cavity 29 in the base body 32 and by radial relief of the annular body by spring back form-fitting manner on the inner wall of the cavity 29 determines. Again, the slider 54 is completely embedded up to an end stop 39 in the central cavity 29 of the body 32.

The third embodiment according to Fig. 6a and 6b shows the pin carriage 31 with a slider 74. The slider 74 is an annular, flat body which rests between the outer wall 35 and the inner wall 36 on the recessed connecting webs 37. Since the connecting webs 37 are set back, the sliding body 74 extends beyond the supporting edge of the underside into the main body 32. The slider 74 is z. B. glued to the main body 32.

The sliding body 31 is according to the embodiments according to 4 to 6 at the bottom of the body 32 slightly before, so that the coil or sleeve support 31 rests with the sliding surface 28 of the slider 34, 54, 74 and not with the end edges of its support bottom 30 of the support surface.

Claims (12)

Coil or sleeve carrier (31) for a bobbin and tube transport system (1) on a textile machine, wherein the bobbin or sleeve carrier (31) comprises a pin (33) arranged on a base body (32) for receiving an empty tube or bobbin , and the base body (32) has a carrier underside (30) for slidingly displaceable direct or indirect support of the reel or sleeve carrier (31) on the bearing surface (7) of a conveyor track (6) of the transport system (1),
characterized in that
on the underside of the carrier (30) partially or over the entire surface of a sliding pad (34, 54, 74) of high abrasion resistance and high lubricity is applied, which consists of a different material than the base body (32). A spool or sleeve carrier according to claim 1, wherein the sliding pad (34, 54, 74) is made of a plastic. Coil or sleeve carrier according to claim 2, wherein the sliding pad (34, 54, 74) made of a thermoplastic material, preferably of polyamide (PA), in particular PA 66, is. Coil or sleeve carrier according to one of claims 1 to 3, wherein the sliding pad (34, 54, 74) is one or more parts and with the carrier base (30) receives a material, force and / or positive connection. Coil or sleeve carrier according to one of claims 1 to 4, wherein the carrier base is partially or fully covered with the sliding pad. Coil or sleeve carrier according to one of claims 1 to 5, wherein the base body (32) is a one- or two-sided, at least to the support surface (7) towards open hollow body with a preferably annular outer wall (35), and the sliding pad (34) a partially or completely into a cavity (29) of the Base body (32) is inserted sliding body (34), and the sliding body (34) of the underside (30) of the base body (32) protrudes, so that the coil or sleeve carrier (31) with the sliding surface (28) of the sliding body (34) the support surface (7) rests. Coil or sleeve carrier according to claim 6, wherein the base body (32) is a one- or two-sided open hollow body with a preferably annular outer wall (35) and an inner, including an open central cavity (29) in itself closed inner wall (36) and the sliding support (34) is a sliding body (34) embedded in the central cavity (29) of the base body (32), and the sliding body (34) protrudes from the underside (30) of the base body (32), so that the coil or sleeve carrier (31) with the sliding surface (28) of the sliding body (34) of the support surface (7) rests. Coil or sleeve carrier according to claim 7, wherein the base body (32) is a one- or two-sided open hollow body with an annular outer wall (35) and an inner, preferably concentric with the outer wall (35) arranged annular inner wall (36), which has an open central cavity (29) includes, and the sliding pad (34) in the central cavity (29) of the base body (32) embedded, preferably circular sliding body (34), and the sliding body (34) of the underside (30) of the body ( 32) protrudes, so that the coil or sleeve carrier (31) with the sliding surface (28) of the sliding body (34) of the support surface (7) rests. Coil or sleeve carrier according to one of claims 6 to 8, wherein the sliding pad (34, 54) is an annular body or a solid body, each with a radial excess, which by radial compression in a preferably circular or annular cavity (29) in the body ( 32) is insertable and by radial relief of the base body (34, 54) by means of positive return spring force positively in the cavity (29) is stuck. Coil or sleeve carrier according to one of claims 1 to 9, wherein the base body (32) comprises a one- or two-sided open hollow body with an annular outer wall (35) and an inner, preferably concentric with the outer wall (35) arranged annular inner wall (36) which includes an open central cavity (29), and the outer wall (35) is connected to the annular inner wall (36) via a plurality of radially and spaced internally recessed connecting webs (37) and the sliding pad (74) annular sliding body (74) which is disposed between the outer wall (35) and inner wall (36) resting on the recessed connecting webs (37), wherein the sliding body (74) of the underside (30) of the base body (32) protrudes, so that the coil or sleeve carrier (31) with the sliding surface (28) of the sliding body (34) of the support surface (7) rests. Coil or sleeve carrier according to one of claims 6 to 10, wherein the sliding pad (54) is an annular sliding body (54) with annular gap (59), and the sliding body (54) by radially compressing the annular gap (59) in a preferably annular or circular cavity (29) in the base body (32) is inserted and by means of radial relieving of the annular body (59) by means of return spring force fit in the cavity (29). Coil or sleeve carrier according to one of claims 1 to 11, wherein the base body (32) and / or the pin (33) of the coil or sleeve carrier (31) made of a thermoplastic material, preferably of a polyester, in particular of PBT or PET, is.

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