EP0936173B1 - Arbre d'expansion coulissant monté en porte-à-faux - Google Patents

Arbre d'expansion coulissant monté en porte-à-faux Download PDF

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Publication number
EP0936173B1
EP0936173B1 EP98115538A EP98115538A EP0936173B1 EP 0936173 B1 EP0936173 B1 EP 0936173B1 EP 98115538 A EP98115538 A EP 98115538A EP 98115538 A EP98115538 A EP 98115538A EP 0936173 B1 EP0936173 B1 EP 0936173B1
Authority
EP
European Patent Office
Prior art keywords
expanding
shaft
piece
tie
rod
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP98115538A
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German (de)
English (en)
Other versions
EP0936173A1 (fr
Inventor
Paolo Garella
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
CONVERTING MACHINERY SIDECO S.R.L
Original Assignee
Converting Machinery Sideco Srl
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Publication date
Application filed by Converting Machinery Sideco Srl filed Critical Converting Machinery Sideco Srl
Publication of EP0936173A1 publication Critical patent/EP0936173A1/fr
Application granted granted Critical
Publication of EP0936173B1 publication Critical patent/EP0936173B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H75/00—Storing webs, tapes, or filamentary material, e.g. on reels
    • B65H75/02—Cores, formers, supports, or holders for coiled, wound, or folded material, e.g. reels, spindles, bobbins, cop tubes, cans, mandrels or chucks
    • B65H75/18—Constructional details
    • B65H75/24—Constructional details adjustable in configuration, e.g. expansible
    • B65H75/242—Expansible spindles, mandrels or chucks, e.g. for securing or releasing cores, holders or packages
    • B65H75/248—Expansible spindles, mandrels or chucks, e.g. for securing or releasing cores, holders or packages expansion caused by actuator movable in axial direction

Definitions

  • the present invention relates to a cantilever-mounted expanding shift.
  • a sliding expanding shaft with a high load capacity relates to a cantilever-mounted expanding shift.
  • Expanding shafts are used in a wide range of applications where a reel with a hollow core must be rotatably supported.
  • the expanding shafts may be mounted rotatably in cantilever fashion on a support structure, instead of being supported at both ends as is required for more demanding applications.
  • the cantilever structure involves undeniable advantages fro the point of view of the rapidity and ease of assembly and disassembly of the reel on the shaft, without taking into account the smaller dimensions and lower cost of the structure supporting the shaft itself.
  • a person skilled in the art is obviously also aware how the limitations of structural strength, in a cantilever configuration, result in a very restrictive design specification; all the more so if, as in this sector, there are also problems of a dynamic nature (for example, phenomena associated with fatigue, excessive bending, centrifugal loads resulting from eccentricity, etc.) and it is necessary to ensure a high rigidity so that high winding/unwinding speeds of the reel may be tolerated (of the order of even 250 m/sec.).
  • Sliding expanding shafts have thus been developed, being composed essentially of a supporting shaft on which there is mounted in a sliding manner, but locked in rotation, a cylinder provided with extractable gripping splines or keys which are able to grip the internal core of the reel.
  • FIG. 1 is a partial longitudinal section of a sliding expanding shaft according to the known art.
  • a hollow cylinder 1 from which suitable elements (not shown) for gripping the reel may be radially extracted, is slidably mounted on a supporting shaft 2 by means of bushes or bearings 3.
  • a duct 4 for a fluid under pressure passes through the supporting shaft 2 and leads to an interstice 4a - bounded by seals 5, by the internal surface of the hollow cylinder 1 and by the external surface of the supporting shaft 2 - which distributes the fluid under pressure to a system for extracting/retracting the gripping elements.
  • a root end 2a of the supporting shaft 2 is rotatably mounted, by means of a bearing (not shown), on the winding/unwinding machine, while the other cantilever end 2b terminates in a knob 6 which is free in rotation, but locked in the longitudinal direction.
  • This knob 6 acts, by means of a screw/female thread connection, on a head-piece or nose-piece 7 fixed to the hollow cylinder 1 and hence also slidable longitudinally on the supporting shaft 2 but locked in rotation, with respect to the latter, by means of a key 8.
  • the hollow cylinder 1 is made to rotate by the supporting shaft 2.
  • the knob 6 is made to rotate with respect to the shaft 2, as a result of the screw connection the relative sliding between the supporting shaft 2 and the head-piece/hollow cylinder assembly is obtained, thus making it possible to perform the desired longitudinal adjustment in the alignment of the expanding shaft.
  • the hollow cylinder in order to be able to fit a reel onto it, has an external diameter which is smaller than the internal diameter of the core of the reel which normally, for standardisation purposes, is either 74 mm or 69 mm.
  • the supporting shaft which has a constant cross-section so as to be able to slide inside the hollow cylinder, has a maximum diameter which is necessarily limited by the internal diameter of the hollow cylinder.
  • this latter diameter is defined by the nominal thickness of the cylinder itself which, in order to be able to house the mechanism actuating the extractable gripping elements, on account of the material from which it is made may not in any case be less than about one centimetre.
  • the maximum diameter of the supporting shaft - taking as a reference the more restrictive standard situation - is normally less than 25 mm: this results in a resistant section which is able to bear a maximum working length of 500 mm and a maximum load of 37 kg.
  • the longitudinal adjustment of the expanding cylinder on the supporting shaft may be performed only when the reel is at a standstill or running at a very slow speed.
  • the adjusting knob acting on the supporting shaft and on the head-piece of the hollow cylinder, is made to rotate together with the expanding shaft during operation of the winding/unwinding machine and therefore it is not possible to operate it externally.
  • the object of the present invention is to provide an improved sliding expanding shaft which does not impose particular restrictions on the dimensions of the resisting section and, according to other advantageous aspects, may be adjusted with regard to its longitudinal position, also during rotation at operating speed, and no longer requires the installation of a rotating joint for distribution of the fluid under pressure.
  • an axially sliding expanding shaft of the type mounted in cantilever fashion on a support structure, comprising a main shaft coupled with an expanding cylinder provided with extractable gripping elements designed to retain the core of a reel mounted on the expanding cylinder, in which said main shaft, on the one hand, is locked in rotation and in translation with said expanding cylinder and, on the other hand, is slidable within but locked in rotation with respect to a bell piece mounted rotatably on said support structure, adjusting means for controlling the relative sliding movement of said main shaft and said bell piece also being provided.
  • an expanding shaft as described above in which the adjusting means comprise an axially fixed tie-rod, which is arranged longitudinally inside, and free to slide with respect to, the main shaft and the expanding cylinder, and an adjusting knob acting, on one end, on a fastening end of said tie-rod and, on the other end, on a head-piece for adjusting the expanding cylinder/main shaft assembly.
  • the invention provides a shaft as described above, in which the tie-rod is fixed with respect to the support structure and the adjusting head-piece is freely rotatable with respect to the expanding cylinder so as to remain static, together with the tie-rod, also during rotation of the expanding shaft.
  • a sliding expanding shaft is comprised of an expanding cylinder 11, provided with a system for moving radially extractable gripping elements (not shown), a main shaft 12 and an adjusting head-piece 17 in which an adjusting knob 16 is engaged.
  • the main shaft 12 on the one hand, is fixed to the expanding cylinder 11 - by means of any fixing means, for example by means of a forced connection or a screw/female thread connection 12a - and, on the other hand, is inserted inside a bell piece 20.
  • the bell piece 20 is rotatably mounted, by means of bearings (not shown), on a support structure represented, for example, by the winding/unwinding machine.
  • Sliding bearings 13 are arranged between the bell piece 20 and the main shaft 12: the latter is therefore free to slide inside the bell piece 20, but the relative rotation between these two elements is prevented by the presence of a key 18 which is fixed to the main shaft 12 and slidable in a suitable seat 18a formed in the thickness of the bell piece 20.
  • a tie-rod 21 is inserted longitudinally inside the main shaft 12 and the expanding cylinder 11, emerging axially from the head-piece 17 and from the free end of the main shaft.
  • a fastening end 21a (the right-hand end in Fig. 2) of the tie-rod 21 is connected to the adjusting head-piece 17 by means of the knob 16 so that the mutual positional relationship between the head-piece 17 and the tie-rod 21 may be set by operating the knob 16.
  • the knob 16 is fitted, being fixed in translation and free in rotation, onto the fastening end 21a and, at the same time, is engaged in a seat 17a of the head-piece 17 by means of a screw/female thread connection.
  • the internal end 21b of the tie-rod 21 is fixed instead, by means of a bottom base 22, to the bell piece 20.
  • the main function of the tie-rod 21 is therefore that of providing a connection between the bell piece 20 and the adjusting head-piece 17, through the knob 16, such that rotation of the knob itself, inside the threaded seat 17a of the head-piece 17, is translated into a translatory movement of the head-piece 17, and hence of the entire expanding cylinder 11, with respect to the bell piece 20, thus resulting in the desired longitudinal sliding which allows the adjustment in the alignment of the reel, mounted on the expanding shaft, with respect to the support structure of the winding/unwinding machine.
  • the tie-rod 21 may contain a duct for the distribution of a fluid under pressure to the system for actuating the gripping elements.
  • the tie-rod 21 since it does not have any substantial structural function, may have any small diameter as required, provided that it can withstand to the axial force applied to it by the adjusting knob 16. Therefore, the hole for passage of the rod 21 inside the main shaft 12 and inside the expanding cylinder 11 affects only marginally the resisting section of the expanding shaft, all more so if compared with the hole present in the hollow cylinder of the known art.
  • the expanding shaft according to the invention achieves the sliding movement, adopting a completely new and innovative configuration compared to the known art, since it assigns the function of sliding seat to a special mechanical member, the bell piece 20, which is completely free from constructional limitations of the expanding cylinder.
  • the main shaft may in fact have not only an external diameter which is as large as required, but also an internal hole of very small dimensions: therefore the resisting section of the main shaft 12, also at the point where it is subjected to the maximum bending stress, i.e. in the region of the junction fillet with the expanding cylinder 11, may be of wide dimensions, to the benefit of the maximum load which can be supported by the expanding shaft.
  • a sliding expanding shaft with a working length of 500 mm, main shaft with a diameter of 40 mm and through-hole for the tie-rod 21 with a diameter of 16 mm may easily support a load of up to 200 kg.
  • a suitable locking system acting for example on the end 21b of the tie-rod 21 projecting from the base plate 26, keeps the tie-rod itself static, i.e. fixed with respect to the winding/unwinding machine on which the expanding shaft is mounted.
  • the adjusting head-piece 17 is free in rotation from the cylinder 11 and is locked in rotation on the tie-rod 21 by means of a key 24 which allows only the longitudinal translation thereof.
  • the head-piece 17 has a hub 17b on which a radial bearing 23 is mounted, the outer raceway of which being housed in a corresponding seat of the expanding cylinder 11.
  • the bearing 22 is suitably mounted, so as to be able to transfer the longitudinal movement imparted by the knob 18 to the head-piece 17, also to the expanding cylinder.
  • This second embodiment allows the other objects of the invention to be achieved as well.
  • the fact that the adjusting knob remains static also during rotation of the expanding shaft advantageously allows adjustment of the alignment to be performed also during rotation of the reel.
  • the system for moving the gripping elements may be supplied by means of a charging valve 28 arranged radially in a suitable seat formed in the thickness of the expanding cylinder.
  • the fluid under pressure may be inlet or allowed to flow out through the valve 28 only under static conditions, i.e. when the reel is at a standstill.
  • both the adjusting head-piece and the main shaft are formed as parts separate from the expanding cylinder 11, being assembled only subsequently - a choice this which results in a simpler machining process and hence undoubted advantages from a cost point of view - the same objects could be achieved with other techniques, for example by forming in one piece the main shaft and with the expanding cylinder or also, in the first embodiment described, the adjusting head-piece with the expanding cylinder.
  • radial bearings may be replaced, on the basis also of the specific technological solution adopted, by sliding bearings, by combined thrust bearings or the like.

Landscapes

  • Replacement Of Web Rolls (AREA)
  • Winding Of Webs (AREA)
  • Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)
  • Unwinding Webs (AREA)
  • Rolls And Other Rotary Bodies (AREA)

Claims (10)

  1. Arbre à expansion coulissant axialement, du type monté en porte-à-faux sur une structure porteuse, comprenant un arbre principal (12) associé à un cylindre à expansion (11) doté d'éléments préhenseurs rétractables pouvant retenir le noyau d'une bobine, caractérisé en ce que ledit arbre principal (12) est d'une part verrouillé en rotation et en translation avec ledit cylindre à expansion (11) et d'autre part peut coulisser, tout en y étant verrouillé en rotation (18, 18a), dans un manchon (20) monté de manière à pouvoir tourner sur ladite structure porteuse, des dispositifs de réglage (16, 17, 21, 22) destinés à contrôler le mouvement de coulissement relatif dudit arbre principal (12) et dudit manchon (20) étant également prévus.
  2. Arbre à expansion selon la revendication 1, où lesdits dispositifs de réglage comprennent une tige de traction (21) fixe axialement, disposée longitudinalement à l'intérieur de l'arbre principal (12) et du cylindre à expansion (11) et pouvant y coulisser librement, ainsi qu'un bouton de réglage (16) agissant d'une part sur une extrémité de fixation (21a) de ladite tige de traction (21) et d'autre part sur une partie de réglage (17) de l'ensemble cylindre à expansion / arbre principal.
  3. Arbre à expansion selon la revendication 2, où ladite partie de réglage (17) de l'ensemble cylindre à expansion / arbre principal est constituée d'une pièce de tête de réglage (17) verrouillée en rotation avec l'extrémité du cylindre à expansion (11) opposée à l'arbre principal (12).
  4. Arbre à expansion selon la revendication 3, où ladite tête de réglage (17) possède un logement fileté (17a) dans lequel s'engage une section filetée dudit bouton (16), celui-ci étant fixe en translation et libre en rotation par rapport à ladite extrémité de fixation (21a) de la tige de traction (21).
  5. Arbre à expansion selon l'une quelconque des revendications 2 à 4, où ladite tige de traction (21) est fixée sur le manchon (20) et où ladite tête de réglage (17) est également verrouillée en rotation avec le cylindre à expansion (11).
  6. Arbre à expansion selon la revendication 5, où ladite tête de réglage (17) est fixée sur le cylindre à expansion (11) par un assemblage fileté.
  7. Arbre à expansion selon la revendication 3 ou 4, où ladite tige de traction (21) est fixe par rapport à ladite structure porteuse et où ladite tête de réglage (17) est libre en rotation par rapport audit cylindre à expansion (11) mais verrouillée en rotation par rapport à ladite tige de traction (21).
  8. Arbre à expansion selon la revendication 7, où des paliers radiaux (23, 25) sont disposés entre ladite tige de traction (21) et ledit manchon (20) ainsi qu'entre ladite tête de réglage (17) et ledit cylindre à expansion (11).
  9. Arbre à expansion selon l'une quelconque des revendications précédentes, où des paliers lisses (13) sont placés entre ledit arbre principal (12) et ledit manchon (20) et où ledit manchon (20) présente un logement longitudinal (18a) pour une clavette de guidage (18) fixée sur ledit arbre principal (12).
  10. Arbre à expansion selon l'une quelconque des revendications 2 à 9, où ladite tige de traction (21) abrite des conduits (27) de distribution d'un fluide sous pression apte à commander ledits éléments préhenseurs.
EP98115538A 1998-02-11 1998-08-18 Arbre d'expansion coulissant monté en porte-à-faux Expired - Lifetime EP0936173B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITMI980257 1998-02-11
IT98MI000257A IT1298225B1 (it) 1998-02-11 1998-02-11 Albero espansibile a scorrimento montato a sbalzo

Publications (2)

Publication Number Publication Date
EP0936173A1 EP0936173A1 (fr) 1999-08-18
EP0936173B1 true EP0936173B1 (fr) 2003-04-23

Family

ID=11378894

Family Applications (2)

Application Number Title Priority Date Filing Date
EP98115538A Expired - Lifetime EP0936173B1 (fr) 1998-02-11 1998-08-18 Arbre d'expansion coulissant monté en porte-à-faux
EP99103268A Expired - Lifetime EP0947456B1 (fr) 1998-02-11 1999-02-10 Arbre expansible coulissant en porte-à-faux

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP99103268A Expired - Lifetime EP0947456B1 (fr) 1998-02-11 1999-02-10 Arbre expansible coulissant en porte-à-faux

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EP (2) EP0936173B1 (fr)
ES (2) ES2196442T3 (fr)
IT (1) IT1298225B1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108046004B (zh) * 2017-11-16 2019-09-17 广东天机工业智能***有限公司 放料机构
CN115724297A (zh) * 2022-12-13 2023-03-03 珠海市奥德维科技有限公司 一种卷材放料机构

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2122381A1 (de) * 1971-05-06 1972-11-16 Maschinenfabrik Stahlkontor Weser Lenze Kg, 3251 Gross Berkel Festspannvorrichtung für Wickelhülsen zum Wickeln von Bahnen
US3908926A (en) * 1974-05-17 1975-09-30 Tidland Corp Roll supporting mechanism
DE2527690C3 (de) * 1975-06-21 1978-04-20 Bwg Bergwerk- Und Walzwerk-Maschinenbau Gmbh, 4100 Duisburg Bandhaspel zum Auf- und Abwickeln von Metallbändern
DE3342080A1 (de) * 1983-11-22 1985-05-30 Focke & Co, 2810 Verden Vorrichtung zur aufnahme von bobinen
DE3502452A1 (de) * 1985-01-25 1986-07-31 SMS Schloemann-Siemag AG, 4000 Düsseldorf Auf- und/oder abwickelhaspel fuer walzband
JP3005774B2 (ja) * 1991-07-03 2000-02-07 株式会社新川 リール取付け構造

Also Published As

Publication number Publication date
ES2196442T3 (es) 2003-12-16
IT1298225B1 (it) 1999-12-20
ES2188046T3 (es) 2003-06-16
EP0947456A3 (fr) 2000-07-19
EP0947456B1 (fr) 2002-12-11
EP0936173A1 (fr) 1999-08-18
ITMI980257A1 (it) 1999-08-11
EP0947456A2 (fr) 1999-10-06

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