WO2009004397A1 - Roller for a travelling belt conveyor arranged to produce spontaneous centring of the belt on its guide path - Google Patents
Roller for a travelling belt conveyor arranged to produce spontaneous centring of the belt on its guide path Download PDFInfo
- Publication number
- WO2009004397A1 WO2009004397A1 PCT/IB2007/001809 IB2007001809W WO2009004397A1 WO 2009004397 A1 WO2009004397 A1 WO 2009004397A1 IB 2007001809 W IB2007001809 W IB 2007001809W WO 2009004397 A1 WO2009004397 A1 WO 2009004397A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- support shaft
- elementary
- outer tube
- ring
- roller according
- Prior art date
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G39/00—Rollers, e.g. drive rollers, or arrangements thereof incorporated in roller-ways or other types of mechanical conveyors
- B65G39/02—Adaptations of individual rollers and supports therefor
- B65G39/07—Other adaptations of sleeves
- B65G39/071—Other adaptations of sleeves for aligning belts or sheets
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G15/00—Conveyors having endless load-conveying surfaces, i.e. belts and like continuous members, to which tractive effort is transmitted by means other than endless driving elements of similar configuration
- B65G15/60—Arrangements for supporting or guiding belts, e.g. by fluid jets
- B65G15/64—Arrangements for supporting or guiding belts, e.g. by fluid jets for automatically maintaining the position of the belts
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G17/00—Conveyors having an endless traction element, e.g. a chain, transmitting movement to a continuous or substantially-continuous load-carrying surface or to a series of individual load-carriers; Endless-chain conveyors in which the chains form the load-carrying surface
- B65G17/06—Conveyors having an endless traction element, e.g. a chain, transmitting movement to a continuous or substantially-continuous load-carrying surface or to a series of individual load-carriers; Endless-chain conveyors in which the chains form the load-carrying surface having a load-carrying surface formed by a series of interconnected, e.g. longitudinal, links, plates, or platforms
- B65G17/08—Conveyors having an endless traction element, e.g. a chain, transmitting movement to a continuous or substantially-continuous load-carrying surface or to a series of individual load-carriers; Endless-chain conveyors in which the chains form the load-carrying surface having a load-carrying surface formed by a series of interconnected, e.g. longitudinal, links, plates, or platforms the surface being formed by the traction element
- B65G17/086—Conveyors having an endless traction element, e.g. a chain, transmitting movement to a continuous or substantially-continuous load-carrying surface or to a series of individual load-carriers; Endless-chain conveyors in which the chains form the load-carrying surface having a load-carrying surface formed by a series of interconnected, e.g. longitudinal, links, plates, or platforms the surface being formed by the traction element specially adapted to follow a curved path
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G17/00—Conveyors having an endless traction element, e.g. a chain, transmitting movement to a continuous or substantially-continuous load-carrying surface or to a series of individual load-carriers; Endless-chain conveyors in which the chains form the load-carrying surface
- B65G17/30—Details; Auxiliary devices
- B65G17/38—Chains or like traction elements; Connections between traction elements and load-carriers
- B65G17/40—Chains acting as load-carriers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G2207/00—Indexing codes relating to constructional details, configuration and additional features of a handling device, e.g. Conveyors
- B65G2207/24—Helical or spiral conveying path
Definitions
- Conveyor belt conveyor roll arranged to spontaneously cause centering of the web on its guide path.
- the present invention is in the field of belt conveyors circulating on guide rollers, and more particularly devices for supporting and / or guiding such a belt. More particularly, it relates to a roller arranged to spontaneously align the belt along its guide path.
- Belt conveyors consist mainly of a belt, or belt, circulating in a loop on guide rollers and / or drive.
- Such guide rollers are mainly constituted by a support shaft of the ends of the roller on lateral bearings, which supports an outer tube threaded around the shaft by means of rolling members.
- a support shaft of the ends of the roller on lateral bearings, which supports an outer tube threaded around the shaft by means of rolling members.
- the ends of the support shaft are shaped, such as polygonal profile, to prohibit rotational mobility of the support shaft, while the outer tube is rotatably mounted on the organs rolling to accompany the movement in translation of the band.
- This intermediate sleeve is itself mounted coaxially on the support shaft of pivotally around a journal which is oriented orthogonally to the general axis of extension of the roll. More specifically, this pin is further inclined with respect to the local plane of extension of the strip.
- a first problem with this solution lies in the size and complexity of the internal arrangement of the outer tube. Indeed, the presence of the sleeve and its means for mounting pivotally on the support shaft involves a consequent dimensioning of the diameter of the outer tube, which makes it impossible to set up such a centering roll in substitution of a current guide roller. It appears that it is necessary to specifically modify the existing installation of the conveyor to allow the implantation of at least one such centering roller.
- the organization of the mounting means of the sleeve on the carrier shaft deserves to be simplified, to reduce the mass and thus the inertia of the centering roller, and to facilitate the assembly of the roller in order to to reduce its costs and thus to increase its competitiveness, in particular in order to be able to propose its economically viable substitution for a guide roller.
- a second problem posed by the aforementioned solution lies in its adaptation to a conveyor with two directions of circulation of the band. Indeed, the inclination of the trunnion is determined not only with respect to the local plane of extension of the band, but also with respect to its direction of circulation.
- a known solution consists in arranging the support bearings of the ends of the support shaft so as to allow a 90 ° angular reversal of the latter, to finally orient the pin in the direction of circulation of the strip.
- Such arrangements of the bearings allow a spontaneous angular reversal of the support shaft caused in case of reversal of the direction of circulation of the strip.
- such lateral arrangements of the roll are cumbersome and expensive, and are still specific arrangements which involve a modification of the conveyor installation to allow replacement of a current guide roll by a centering roll.
- a third problem posed by the aforementioned solution lies in the organization of means of protection of the operators.
- the current guide rollers are equipped with a protective member, such as a bar, a plate or similar member, which is held parallel to the axis of the roll being disposed near the band, to prohibit access for an operator to the area of contact between the web and the roll.
- a protective member such as a bar, a plate or similar member
- the presence of support bearings of the ends of the support shaft, or any other member located laterally to the guide roller is used to maintain the ends of the protective member.
- the transposition of such a protective member to a centering roller is made difficult because of the antagonism between the necessary proximity of the protective member with respect to the strip, and the necessary ability to pivot the outer tube around the trunnion. It follows that, in use, the establishment of such a protective body is neglected, or the organization of operator protection means involves specific arrangements that are expensive and cumbersome.
- the general object of the present invention is to provide a belt conveyor roll which is arranged to spontaneously cause centering of the web on its guide path. It is specifically targeted by the present invention to provide solutions to the various problems that have been stated.
- the belt conveyor centering roller of the present invention comprises a coaxial support shaft of an outer tube via at least one rolling cage interposed between the outer tube and the support shaft.
- This rolling cage houses at least one rolling member and comprises an outer ring engaged on the outer tube and an inner ring pivotally mounted on the support shaft via a journal oriented orthogonal to the axis of the roll. .
- Such a journal is in particular provided to be further inclined with respect to the local plane of the band, to allow an angular displacement of the outer tube about the axis of the journal relative to the general axis of the roll, both laterally and transversely at the local level of the band defined by its general circulation plan in the area of the roll.
- such a centering roller is mainly recognizable in that the pin is mounted on the roller by means of a pivoting ring subdivided into three coaxial elementary rings.
- Two elementary end rings are integral with the inner ring and a middle elementary ring is integral with the support shaft.
- the trunnion is indifferently secured to at least one of the elementary end rings and / or of the middle elementary ring, while being inversely free to rotate inside the other of the middle elementary ring and / or elementary end rings.
- the journal is integral with the elementary end rings being received by the central elementary ring freely in rotation.
- the journal is integral with the central elementary ring and is rotatably mounted inside the elementary end rings.
- centering roller proposed by the present invention is able to have a bulk, including diametral space, which is similar to that of a roll of current guidance, with the advantage of being able to be installed on an existing conveyor to replace such a guide roller current, without having to change the initial installation of the conveyor.
- the axial dimension of the elementary rings is advantageously such that at least one of the elementary rings is emerging in the zone of separation between the support shaft and the inner ring, so that the radial gap between these two members is necessary.
- to allow a clearance of the outer tube around the journal relative to the support shaft is determined with respect to the axial dimension of the elementary rings, can be easily achieved at low cost and with tolerances of precision easy to obtain.
- spacers such as washer or the like may be interposed between the middle element ring and the end element rings to adjust the gap between the support shaft and the inner ring.
- these arrangements have the advantage of facilitating the assembly of the inner ring threaded on the support shaft, which is radially guided and spontaneously positioned on the support shaft via the end contact areas corresponding elementary rings.
- the fastening elementary end rings to the inner ring is for example made by hard fitting.
- the elementary end rings are likely to be metal, but are preferably of plastic material. This hard fitting is likely to be completed and / or replaced by a joining of the elementary end rings to the inner ring made by sealing.
- the joining of the trunnion indifferently to the elementary end rings and / or to the inner ring is preferably carried out by means of a sealing boss provided at each end of the trunnion.
- a sealing boss is formed in particular from a supply of a sealing material such as weld seam and / or glue or the like, or is formed of a cap reported and sealed.
- the securing of the middle elementary ring to the support shaft is preferably made by sealing.
- the middle elementary ring is preferably made of metal, more particularly steel.
- the support shaft is provided at its periphery with a tubular element which is threaded around the support shaft and on which is secured the central elementary ring.
- This tubular element is more particularly intended to allow a solid connection by radial sealing between the central elementary ring and the support shaft, preserving the latter from any alteration that may weaken it.
- the tubular element extends over most of the support shaft to reinforce its resistance to bending, the materials constituting the support shaft and the tubular element being likely to be different nevertheless to avoid an increase in the overall mass of the roll while offering satisfactory qualities of mechanical strength.
- the tubular element and the support shaft are preferably secured to each other, in particular axially by sealing, or they may simply be hard-pressed to allow a specific arrangement of the support shaft as described above. far.
- the internal volume of the rolling stand is preferably preserved from the external environment by seals, such as lip seals or the like, that it lodges in the interposition between the outer ring and the inner ring at the ends of the rolling cage. especially.
- the outer tube is preferably secured to the outer ring by means of at least one sealing plug or the like.
- the axial dimension of at least one of the elementary rings is advantageously emerging in the separation zone between the support shaft and the inner ring.
- This elementary ring at least constitutes in particular a radial positioning spacer of these members relative to each other by providing between them the gap necessary for the displacement of the outer tube about the axis of the trunnion.
- the ends of the support shaft are each advantageously formed by a pivot shaft.
- the support shaft is coaxially rotatable relative to the pivot shafts and is provided with means for limiting its rotational stroke.
- This rotation stroke limitation is in particular carried out on an angular range of turning of the support shaft determined in relation to the angle of inclination of the pin relative to the local plane of the strip.
- the angle of inclination of the trunnion is of the order of 45 ° and the angular range of inversion of the support shaft is the order of 90 °.
- Said dynamometric means are advantageously constituted by a rotational mounting of the pivot shafts on the support shaft by means of at least one respective rolling member of a diameter smaller than those of the rolling bearing. More particularly for a given tangential tension, the torque difference applied to a rolling member of a diameter smaller than that of another rolling member respectively assigned to a pivot shaft and to the outer tube, is exploited for, in case a tangential tension exerted by the band on the outer tube, inducing if necessary an angular reversal of the support shaft in priority to a rotation of the outer cage on the rolling member assigned to it.
- Such embodiments of the dynamometric means are nonetheless likely to be supplemented and / or substituted by another arrangement of the dynamometric means favoring an angular reversal of the support shaft with respect to a angular reversal of the outer tube in case of reversal of the running direction of the strip.
- the rolling members respectively assigned to the outer tube and the pivot shafts may be of a different structure providing from the relativity between these structures the constitution of the dynamometric means.
- specific dynamometric means are interposed between the pivot shafts and the outer tube and / or any of the members connected in rotation with the latter.
- the rolling members assigned to the pivot shafts are more particularly interposed between the latter and the tubular element.
- This tubular element is not only used for the assembly of the roller as referred to above, but also is used to be a bearing cage for pivoting shafts.
- the internal volume of the tubular element is preserved from the external environment by seals, such as lip seals or the like, which it lodges at its respective ends in interposition between its inner face and the pivot shaft. corresponding.
- the means for limiting the rotational travel of the support shaft are, for example, structurally simple, inexpensive and compact, by cooperating abutment members respectively provided on the support shaft, and more particularly the case. on the corresponding tubular element, and on at least one of the pivot shafts.
- the centering roller is preferably equipped with a protective member, such as a bar, a plate or similar member, which extends in particular parallel to the short outer distance of the outer tube.
- a protective member such as a bar, a plate or similar member, which extends in particular parallel to the short outer distance of the outer tube.
- This protection member is advantageously carried at its ends by respective members, as arranged in plates or similar member, which are secured to the outer tube with respect to its mobility around the axis of the pin.
- Each of the members carrying the protective member is more specifically secured to the rolling cage by means of an extension which is assigned to it and which extends inside the roller to the corresponding end of this last.
- the extensions are in particular placed inside the roller interposed between the support shaft and the outer tube.
- the bearing members of the protective member are more particularly each secured, in particular by their corresponding end, to the inner ring of the bearing housing. This securing is advantageously achieved by means of axial gripping means of the extension on the corresponding inner ring.
- the extension is an inner tube, an arm or the like, which is capable of being in axial engagement directly on the inner ring while being threaded on the latter and fixed radially by at least one fastening member, pin or similar organ in particular.
- the extension is attached to the inner ring by means of a fixing ring which carries the extension to which it is secured, particularly by sealing.
- a fixing ring which carries the extension to which it is secured, particularly by sealing.
- Such a ring is for example screwed to the inner ring at the corresponding end of the latter, and is provided with a flange or the like to which is secured the corresponding extension.
- the members carrying the protection member are preferably attached at the end of the extension which is assigned to it by means of connecting means.
- these connecting means are of the interlocking type implementing cooperating members respectively formed on the tube and on the bearing members of the protective member, or are of the type by screwing.
- the extension being constituted by an inner tube, the latter is provided at its corresponding end with a flange, which is in particular reported by sealing at the end of the inner tube.
- the bearing members of the protective member are attached to the flanges by means of screws or the like.
- the protective member is preferably equipped with means for adjusting its position relative to the outer tube.
- These adjustment means are for example constituted by a cooperation between fasteners and / or interlocking and receiving lights of these organs, which are indifferently assigned to the protective member, the bearing members of the latter and to the extension. More particularly, the adjustment means are indifferently placed in interposition between the protective member and the bodies which carry it, and / or between the members carrying the protective member and the extension to which they are attached.
- Such adjustment means may be indifferently continuous variation and / or discrete variation of the position of the protective member relative to the outer tube.
- the adjustment means are constituted by members, such as screws or the like, for fixing the protective member on the members that carry it. These fixing screws pass through the members carrying the protection member through a respective oblong slot which is oriented transversely to the local plane of the strip.
- the protective member is for example consisting of a thick plate of plastic material attached to its corresponding ends to the organs that carry it through the fasteners that penetrate.
- the various sealing means used are, in particular, means of the type by welding, by brazing with the addition of a solder fusible material. more particularly, and / or of the type by gluing or other similar techniques.
- the implementation of such sealing means offers satisfactory reliability and robustness, which simplifies the structure and reduces the diametral bulk including the roller, and which simplifies the assembly operations of the roller.
- Fig.1 and fig.2 are views in axial section along respectively orthogonal planes of a centering roller according to a first embodiment of the present invention.
- Fig.3 is a radial sectional view of the centering roller shown in Fig.1 and Fig.2.
- Fig.4 is a detail in axial section of the end of a centering roller according to a second embodiment of the present invention.
- Figures 5 and 6 are partial view illustrations of a centering roller according to a third embodiment of the present invention, respectively in axial section and seen end.
- a centering roller is intended to equip a belt conveyor to spontaneously correct any lateral offset of the band traveling on the roller. More particularly, in the case where the band slips laterally on the roll, the surface on which the strip travels is spontaneously inclined at an angle A with respect to the main axis B1 of rotation of the roll, both laterally and relative to the plane local band. As an indication, this angle A is of a value that can extend up to 5 °. It will be noted that the provisions of the present invention offer an excellent compromise between obtaining such a displacement value of the outer tube, and a reduced diametral size of the roll. In fig.1 to fig.3, the roller is mainly composed of an outer tube 1 on the surface of which the strip is intended to circulate.
- the outer tube 1 is rotatably mounted on a support shaft 2, the ends of which are intended to be supported by lateral bearings.
- the ends of the support shaft 2 comprise on their outer surface flats 3 intended to cooperate with a housing of complementary shape of the bearings, so as to immobilize the support shaft 2 in rotation while the outer tube 1 accompanies by a movement turning the scroll of the band.
- the outer tube 1 is coaxially supported by the support shaft 2 via a rolling cage 4, comprising a pair of rolling members 5 placed at its ends.
- This rolling cage 4 comprises an outer ring 6 engaged on the outer tube 1, and an inner ring 7 immobilized in rotation around the general axis B1 of the roll.
- the outer tube 1 is pivotally mounted about the axis B2 of a pin 8 which is oriented orthogonally to the axis of rotation Bl of the roll.
- the pin 8 will also be inclined with respect to the local plane of the strip. This inclination, as an indication of the order of 45 °, is in particular imparted to the trunnion 8 from the arrangement of the bearings receiving the ends of the support shaft 2.
- the orientation of the trunnion 8 is determined relative to the orientation of the general plane of the flats 3 that comprises the support shaft 2.
- the orientation of the pin 8 is parallel to the general plane of the flats 3.
- the pin 8 is secured to the inner ring 7, and is mounted freely rotating inside the support shaft 2.
- the pin 8 is rotatably mounted inside the inner ring 7, and is integral with the support shaft 2.
- the pin 8 is threaded inside a pivot ring subdivided into three elementary rings, including two elementary end rings 9 integral with the inner ring 7 and a middle elementary ring 10 secured to the support shaft 2.
- an analogy of bad quality would consist in subdividing the pivot ring into only two elementary rings, a single end 9 and the other median 10.
- this analogy although functionally equivalent, would not have satisfactory balancing and robustness of the centering roller.
- the elementary rings 9, 10 are secured to the member to which they are affected by sealing, and more particularly by brazing. More particularly, the elementary rings 9, 10 are respectively secured to the inner ring 7 and to the support shaft 2 via peripheral weld seams.
- the pin 8 is secured to the elementary end rings 9 and / or to the inner ring 7 via a sealing boss 11 formed by a weld seam. This boss 11 constitutes a robust member against an axial displacement of the pin 8.
- the elementary end rings 9 are fitted hard inside respective housings which are previously formed through the inner ring 7.
- the middle elementary ring 10 is welded to the support shaft 2 by means of a tubular element 12 threaded on the latter. In the embodiment variant illustrated in FIGS. 1 to 3, this tubular element 12 is welded at its ends to the support shaft 2 with which it forms a one-piece assembly.
- the end rings 9 extend beyond the thickness of the inner ring 7 towards the middle ring 10. This extension is intended to position the inner ring 7 radially relative to the support shaft 2, by providing a gap between them necessary to allow the pivoting of the outer tube 1 around the axis B2 of the pin 8.
- the outer tube 1 is secured to the outer ring 6 by means of weld plugs 13.
- These weld plugs 13 are attached inside windows previously formed through the outer tube 6, and are formed from a sealing material, and in particular a fuse soldering material.
- a sealing material and in particular a fuse soldering material.
- such a fastening through sealing plugs such as 13 provides such a fastening that is reliable, simple to perform and inexpensive.
- Lip seals 14 or the like are placed at the ends of the rolling stand 4, to preserve its internal volume vis-à-vis the external environment and to ensure the tightness of the latter.
- the ends of the support shaft 2 are constituted by pivoting shafts 15, so that an angular reversal of the support shaft 2 around the general axis B1 of the roller is spontaneously caused. in case of a reversal of the tape direction.
- the support shaft 2 is rotatably mounted on the pivot shafts 15 by means of rolling members 16.
- the amplitude of the angular reversal of the support shaft 2 is determined by means 17 for limiting its stroke. in rotation, constituted by cooperating abutment members 18, 19 respectively formed on the support shaft 2 and on at least one of the pivoting shafts 15. This amplitude corresponds as a guide to an angular range between 60.degree.
- these abutment members are constituted for one by a finger 18 or the like integral with the support shaft 2, and for the other by a groove 19 formed on the periphery of the shaft. Pivoting 15.
- Other analog stroke limiting means 17 may be used and / or be differently arranged without departing from the scope of the present invention.
- the roller comprises dynamometric means allowing such angular reversal priority of the support shaft 2.
- these dynamometric means consist of a difference of diameter between the rolling members 5 assigned to the rotation of the outer tube 1 and the rolling members 16 assigned to the angular reversal of the support shaft 2.
- the tubular element 12 associated with the support shaft 2 is used to receive the pivot shaft 15 and the corresponding rolling members 16. In particular, this tubular element 12 extends axially beyond the support shaft 2, to allow to receive the rolling members 16. Joints 20, such as lip seals or the like, make it possible to preserve the internal volume of the body. tubular element 12.
- the roller is equipped with a protective member 21 consisting of a plate extending close to the outer surface of the outer tube 1.
- This protection member 21 is supported at its ends. ends by plates 22 which are secured to the outer tube 1, through the inner ring 7 of the rolling shaft 4.
- the plates 22 are integral with the inner ring 7 by means of an extension 23 formed of an inner tube, which is attached at the end of the inner ring 7 by means of a fixing ring 24.
- This ring 24 is screwed to the end of the inner ring 7, and is immobilized in rotation by pinning such that by means of a fixing screw 25 in the example shown.
- the fixing ring 24 comprises a flange 26 on which the extension 23 is fixed by sealing, such as by welding or the like.
- the plates 22 are fixed to the extension 23 by fixing screws 27 conferring on them a removable character, to allow a quick and easy removal and installation of the protective member 21 on the roll. These fixing screws 27 are engaged on an end flange 28 attached to the end of the extension 23, by sealing such as by welding in particular.
- the plates 22 support the protection member 21 via means
- these means 29 combine oblong lights
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Rollers For Roller Conveyors For Transfer (AREA)
Abstract
The invention relates to a centring roller for a belt conveyor. This roller comprises a shaft (2) giving coaxial support to an external tube (1) via a rolling-bearing cage (4) that comprises an outer ring (6) engaged on the external tube (1) and an inner ring (7) which pivots on the supporting shaft (2) via a journal (8) oriented at right angles to the axis Bl of the roller. The journal (8) is mounted on the roller via a pivoting ring subdivided into three coaxial elementary rings (9, 10), namely two elementary end rings (9) connected to the journal (8) and to the inner ring (7), and a central elementary ring (10) which is connected to the supporting shaft (2) and accommodates, and allows free rotation of, the journal (8).
Description
Rouleau pour convoyeur à bande défilante agencé pour provoquer spontanément un centrage de la bande sur son chemin de guidage. Conveyor belt conveyor roll arranged to spontaneously cause centering of the web on its guide path.
Domaine technique de l'invention.Technical Field of the Invention
La présente invention est du domaine des convoyeurs à courroie circulant sur des rouleaux de guidage, et plus particulièrement des dispositifs pour soutenir et/ou pour guider une telle courroie. Elle a plus particulièrement pour objet un rouleau aménagé pour aligner spontanément la courroie le long de son chemin de guidage.The present invention is in the field of belt conveyors circulating on guide rollers, and more particularly devices for supporting and / or guiding such a belt. More particularly, it relates to a roller arranged to spontaneously align the belt along its guide path.
Etat de la technique.State of the art
Les convoyeurs à courroie sont principalement constitués d'une bande, ou courroie, circulant en boucle sur des rouleaux de guidage et/ou d'entraînement.Belt conveyors consist mainly of a belt, or belt, circulating in a loop on guide rollers and / or drive.
De tels rouleaux de guidage sont principalement constitués d'un arbre de soutien des extrémités du rouleau sur des paliers latéraux, qui supporte un tube externe enfilé autour de l'arbre par l'intermédiaire d'organes de roulement. De manière courante, au moins les extrémités de l'arbre de soutien sont conformées, tel qu'en profil polygonal, pour interdire une mobilité en rotation de l'arbre de soutien, tandis que le tube externe est monté fou en rotation sur les organes de roulement pour accompagner le mouvement en translation de la bande.Such guide rollers are mainly constituted by a support shaft of the ends of the roller on lateral bearings, which supports an outer tube threaded around the shaft by means of rolling members. Currently, at least the ends of the support shaft are shaped, such as polygonal profile, to prohibit rotational mobility of the support shaft, while the outer tube is rotatably mounted on the organs rolling to accompany the movement in translation of the band.
Un problème général posé réside dans le maintien de la bande sur son chemin de guidage. Plus particulièrement, la bande est susceptible d'avoir tendance à se déporter latéralement sur les rouleaux de guidage. Il est donc nécessaire de prévoir des aménagements pour aligner spontanément la bande sur les rouleaux de guidage afin d'éviter un tel déport latéral au-delà des extrémités du tube. C'est pourquoi, il a été proposé des rouleaux de centrage spontané de la bande, dans lesquels les organes de roulement sont montés sur un manchon intermédiaire ou analogue qui est interposé entre le tube externe et l'arbre de soutien. Ce manchon intermédiaire est lui-même monté coaxialement sur l'arbre de soutien de
manière pivotante autour d'un tourillon qui est orienté orthogonalement à l'axe général d'extension du rouleau. Plus spécifiquement, ce tourillon est en outre orienté de manière inclinée par rapport au plan local d'extension de la bande. Ces dispositions sont telles qu'un déport latéral de la bande induit un pivotement du manchon porteur du tube externe autour du tourillon, avec pour conséquence de provoquer spontanément un déplacement latéral de la bande sur le rouleau jusqu'à son centrage sur ce dernier. Pour connaître un environnement technologique proche de la présente invention, on pourra se reporter aux documents WO9609237 (SAVAGE P. A. & CUMBERLEGE J. P.) et WO0075054 (ROYON OY & al.).A general problem lies in maintaining the band on its guide path. More particularly, the web is likely to have a tendency to shift laterally on the guide rollers. It is therefore necessary to provide arrangements to spontaneously align the band on the guide rollers to prevent such lateral offset beyond the ends of the tube. Therefore, it has been proposed spontaneous centering rollers of the strip, wherein the rolling members are mounted on an intermediate sleeve or the like which is interposed between the outer tube and the support shaft. This intermediate sleeve is itself mounted coaxially on the support shaft of pivotally around a journal which is oriented orthogonally to the general axis of extension of the roll. More specifically, this pin is further inclined with respect to the local plane of extension of the strip. These arrangements are such that a lateral offset of the strip induces a pivoting of the outer tube carrying sleeve around the journal, with the consequence of spontaneously causing a lateral displacement of the strip on the roll until it is centered on the latter. For a technological environment similar to the present invention, reference may be made to the documents WO9609237 (SAVAGE PA & CUMBERLEGE JP) and WO0075054 (ROYON OY & al.).
Un premier problème posé par cette solution réside dans l'encombrement et dans la complexité de l'aménagement interne du tube externe. En effet, la présence du manchon et de ses moyens pour son montage en pivotement sur l'arbre de soutien implique un dimensionnement conséquent du diamètre du tube externe, qui rend impossible la mise en place d'un tel rouleau de centrage en substitution d'un rouleau courant de guidage. Il en ressort qu'il est nécessaire de modifier spécifiquement l'installation existante du convoyeur pour permettre l'implantation d'au moins un tel rouleau de centrage. En outre, l'organisation des moyens de montage du manchon sur l'arbre porteur mérite d'être simplifiée, pour réduire la masse et donc l'inertie du rouleau de centrage, et pour faciliter les modalités d'assemblage du rouleau afin d'en réduire les coûts et donc d'accroître sa compétitivité, en vue notamment de pouvoir proposer sa substitution économiquement viable à un rouleau de guidage. Cependant, il doit être pris en compte qu'une telle réduction de masse et d'encombrement, et qu'une telle simplification de structure et d'assemblage du rouleau de centrage, ne doivent pas être faites au détriment de sa robustesse et de sa fiabilité.A first problem with this solution lies in the size and complexity of the internal arrangement of the outer tube. Indeed, the presence of the sleeve and its means for mounting pivotally on the support shaft involves a consequent dimensioning of the diameter of the outer tube, which makes it impossible to set up such a centering roll in substitution of a current guide roller. It appears that it is necessary to specifically modify the existing installation of the conveyor to allow the implantation of at least one such centering roller. In addition, the organization of the mounting means of the sleeve on the carrier shaft deserves to be simplified, to reduce the mass and thus the inertia of the centering roller, and to facilitate the assembly of the roller in order to to reduce its costs and thus to increase its competitiveness, in particular in order to be able to propose its economically viable substitution for a guide roller. However, it must be taken into account that such a reduction in mass and bulk, and that such a simplification of the structure and assembly of the centering roller, must not be made to the detriment of its robustness and its reliability.
Un deuxième problème posé par la solution susvisée réside dans son adaptation à un convoyeur à double sens de circulation de la bande. En effet, l'inclinaison du tourillon est déterminée non seulement par rapport au plan local d'extension de la bande, mais aussi par rapport à son sens de circulation. Une solution connue
consiste à aménager les paliers de maintien des extrémités de l'arbre de soutien de manière à permettre un retournement angulaire à 90° de ce dernier, pour finalement orienter le tourillon selon le sens de circulation de la bande. De tels aménagements des paliers permettent un retournement angulaire spontané de l'arbre de soutien provoqué en cas d'inversion du sens de circulation de la bande. Cependant, de tels aménagements en zones latérales du rouleau sont encombrants et coûteux, et sont encore des aménagements spécifiques qui impliquent une modification de l'installation du convoyeur pour permettre un remplacement d'un rouleau de guidage courant par un rouleau de centrage.A second problem posed by the aforementioned solution lies in its adaptation to a conveyor with two directions of circulation of the band. Indeed, the inclination of the trunnion is determined not only with respect to the local plane of extension of the band, but also with respect to its direction of circulation. A known solution consists in arranging the support bearings of the ends of the support shaft so as to allow a 90 ° angular reversal of the latter, to finally orient the pin in the direction of circulation of the strip. Such arrangements of the bearings allow a spontaneous angular reversal of the support shaft caused in case of reversal of the direction of circulation of the strip. However, such lateral arrangements of the roll are cumbersome and expensive, and are still specific arrangements which involve a modification of the conveyor installation to allow replacement of a current guide roll by a centering roll.
Un troisième problème posé par la solution susvisée réside dans l'organisation de moyens de protection des opérateurs. Selon une méthode connue, les rouleaux de guidage courants sont équipés d'un organe de protection, tel qu'une barre, une plaque ou organe analogue, qui est maintenu parallèlement à l'axe du rouleau en étant disposé à proximité de la bande, en vue d'interdire un accès pour un opérateur à la zone de contact entre la bande et le rouleau. Plus particulièrement, la présence des paliers de support des extrémités de l'arbre de soutien, ou de tout autre organe situé latéralement au rouleau de guidage, est mise à profit pour maintenir les extrémités de l'organe de protection. Cependant, la transposition d'un tel organe de protection à un rouleau de centrage est rendue délicate en raison de l'antagonisme entre la nécessaire proximité de l'organe de protection par rapport à la bande, et la nécessaire faculté de pivotement du tube externe autour du tourillon. Il en ressort qu'à l'usage, la mise en place d'un tel organe de protection est négligée, ou l'organisation des moyens de protection des opérateurs implique des aménagements spécifiques qui sont coûteux et encombrants.A third problem posed by the aforementioned solution lies in the organization of means of protection of the operators. According to a known method, the current guide rollers are equipped with a protective member, such as a bar, a plate or similar member, which is held parallel to the axis of the roll being disposed near the band, to prohibit access for an operator to the area of contact between the web and the roll. More particularly, the presence of support bearings of the ends of the support shaft, or any other member located laterally to the guide roller, is used to maintain the ends of the protective member. However, the transposition of such a protective member to a centering roller is made difficult because of the antagonism between the necessary proximity of the protective member with respect to the strip, and the necessary ability to pivot the outer tube around the trunnion. It follows that, in use, the establishment of such a protective body is neglected, or the organization of operator protection means involves specific arrangements that are expensive and cumbersome.
Objet de l'invention.Object of the invention
Le but général de la présente invention est de proposer un rouleau pour convoyeur à bande qui est agencé pour provoquer spontanément un centrage de la bande sur son chemin de guidage. Il est plus spécifiquement visé par la
présente invention de proposer des solutions aux divers problèmes qui ont été énoncés.The general object of the present invention is to provide a belt conveyor roll which is arranged to spontaneously cause centering of the web on its guide path. It is specifically targeted by the present invention to provide solutions to the various problems that have been stated.
Il est notamment visé de proposer un tel rouleau de centrage qui soit de structure simple, d'un assemblage aisé et d'un encombrement réduit pour une robustesse et une fiabilité satisfaisantes, et dont l'organisation est susceptible de permettre son installation en substitution d'un rouleau de guidage courant sans impliquer une modification significative de l'installation du convoyeur.It is particularly intended to provide such a centering roller which is of simple structure, easy assembly and compactness for a satisfactory robustness and reliability, and whose organization is likely to allow its installation in substitution of a current guide roller without implying a significant change in the conveyor installation.
II est encore notamment visé de proposer un tel rouleau de centrage susceptible de fonctionner suivant deux sens inverses de circulation de la bande, en provoquant le cas échéant spontanément un retournement angulaire du rouleau, sans que les aménagements correspondants induisent un encombrement latéral du rouleau ni fassent obstacle à une potentielle dite substitution.It is also particularly intended to provide such a centering roller capable of operating in two opposite directions of circulation of the strip, possibly causing spontaneous angular reversal of the roll, without the corresponding arrangements inducing a lateral size of the roll nor do obstacle to a potential so-called substitution.
II est encore notamment visé de proposer un aménagement d'un tel rouleau de centrage visant à le doter de moyens de protection d'un opérateur, sans que de tels moyens ne soient significativement plus coûteux ou encombrants que ceux habituellement utilisés pour les rouleaux de guidage courants.It is also particularly intended to provide an arrangement of such a centering roller for providing it with means of protection of an operator, without such means being significantly more expensive or bulky than those usually used for guide rollers. currents.
Le rouleau de centrage pour convoyeur à bande de la présente invention comprend un arbre de soutien coaxial d'un tube externe par l'intermédiaire d'au moins une cage de roulement interposée entre le tube externe et l'arbre de soutien. Cette cage de roulement loge au moins un organe de roulement et comprend une bague extérieure en prise sur le tube externe et une bague intérieure montée pivotante sur l'arbre de soutien par l'intermédiaire d'un tourillon orienté orthogonalement à l'axe du rouleau. Un tel tourillon est notamment prévu d'être en outre incliné par rapport au plan local de la bande, pour autoriser un débattement angulaire du tube externe autour de l'axe du tourillon par rapport à l'axe général du rouleau, tant latéralement que transversalement au plan local de la bande défini par son plan général de circulation dans la zone du rouleau.
Selon un premier aspect de la présente invention, un tel rouleau de centrage est principalement reconnaissable en ce que le tourillon est monté sur le rouleau par l'intermédiaire d'une bague de pivotement subdivisée en trois bagues élémentaires coaxiales. Deux bagues élémentaires d'extrémités sont solidaires de la bague intérieure et une bague élémentaire médiane est solidaire de l'arbre de soutien. Le tourillon est indifféremment solidaire de l'une au moins des bagues élémentaires d'extrémités et/ou de la bague élémentaire médiane, en étant inversement libre en rotation à l'intérieur de l'autre quelconque de la bague élémentaire médiane et/ou des bagues élémentaires d'extrémité. De préférence, le tourillon est solidaire des bagues élémentaires d'extrémité en étant reçu par la bague élémentaire médiane de manière libre en rotation. Selon une autre variante, le tourillon est solidaire de la bague élémentaire médiane et est monté libre en rotation à l'intérieur des bagues élémentaires d'extrémité.The belt conveyor centering roller of the present invention comprises a coaxial support shaft of an outer tube via at least one rolling cage interposed between the outer tube and the support shaft. This rolling cage houses at least one rolling member and comprises an outer ring engaged on the outer tube and an inner ring pivotally mounted on the support shaft via a journal oriented orthogonal to the axis of the roll. . Such a journal is in particular provided to be further inclined with respect to the local plane of the band, to allow an angular displacement of the outer tube about the axis of the journal relative to the general axis of the roll, both laterally and transversely at the local level of the band defined by its general circulation plan in the area of the roll. According to a first aspect of the present invention, such a centering roller is mainly recognizable in that the pin is mounted on the roller by means of a pivoting ring subdivided into three coaxial elementary rings. Two elementary end rings are integral with the inner ring and a middle elementary ring is integral with the support shaft. The trunnion is indifferently secured to at least one of the elementary end rings and / or of the middle elementary ring, while being inversely free to rotate inside the other of the middle elementary ring and / or elementary end rings. Preferably, the journal is integral with the elementary end rings being received by the central elementary ring freely in rotation. According to another variant, the journal is integral with the central elementary ring and is rotatably mounted inside the elementary end rings.
Ces dispositions sont telles que la structure du rouleau en est simplifiée, et que son assemblage est rapide et aisé : Les bagues élémentaires sont dans un premier temps solidarisées à l'organe correspondant, puis la bague interne est enfilée autour de l'arbre de soutien et le tourillon est enfilé à l'intérieur des bagues et est solidarisé aux bagues élémentaires d'extrémité, puis la bague externe est enfilée à l'intérieur du tube externe auquel elle est préférentiellement solidarisée au moyen d'un bouchon de scellement notamment, puis les organes de roulement sont mis en place aux extrémités respectives de la cage de roulement.These provisions are such that the structure of the roll is simplified, and that its assembly is fast and easy: The elementary rings are first secured to the corresponding member, then the inner ring is threaded around the support shaft and the pin is threaded inside the rings and is secured to the elementary end rings, then the outer ring is threaded inside the outer tube to which it is preferably secured by means of a particular sealing plug, then the rolling members are put in place at the respective ends of the rolling frame.
Ces dispositions sont aussi telles, en relation avec les modalités d'assemblage du rouleau proposées, que les différentes opérations de solidarisation sont susceptibles d'être des opérations d'emboîtement et/ou de scellement, notamment, avec pour avantage des moyens de solidarisation peu coûteux et peu encombrants.These arrangements are also such, in relation with the proposed roll assembly methods, that the various joining operations are likely to be interlocking and / or sealing operations, in particular, with the advantage of little fastening means. expensive and compact.
Ces dispositions sont aussi finalement telles que le rouleau de centrage proposé par la présente invention est propre à présenter un encombrement, encombrement diamétral notamment, qui est analogue à celui d'un rouleau de
guidage courant, avec pour avantage de pouvoir être installé sur un convoyeur existant en remplacement d'un tel rouleau de guidage courant, sans avoir à modifier l'installation initiale du convoyeur.These arrangements are also finally such that the centering roller proposed by the present invention is able to have a bulk, including diametral space, which is similar to that of a roll of current guidance, with the advantage of being able to be installed on an existing conveyor to replace such a guide roller current, without having to change the initial installation of the conveyor.
La dimension axiale des bagues élémentaires est avantageusement telle que l'une quelconque au moins des bagues élémentaires est émergente dans la zone de séparation entre l'arbre de soutien et la bague intérieure, de sorte que l'écart radial entre ces deux organes, nécessaire pour autoriser un débattement du tube externe autour du tourillon par rapport à l'arbre de soutien, est déterminé au regard de la dimension axiale des bagues élémentaires, susceptible d'être aisément réalisée à faible coût et avec des tolérances de précision aisée à obtenir. Accessoirement, mais de manière non préférée, des intercalaires tels que rondelle ou analogue sont susceptibles d'être interposés entre la bague élémentaire médiane et les bagues élémentaires d'extrémité pour ajuster l'écart entre l'arbre de soutien et la bague interne. En outre, ces dispositions présentent l'avantage de faciliter l'assemblage de la bague interne enfilée sur l'arbre de soutien, qui se trouve radialement guidée et spontanément positionnée sur l'arbre de soutien par l'intermédiaire des zones de contact en bout correspondant des bagues élémentaires.The axial dimension of the elementary rings is advantageously such that at least one of the elementary rings is emerging in the zone of separation between the support shaft and the inner ring, so that the radial gap between these two members is necessary. to allow a clearance of the outer tube around the journal relative to the support shaft, is determined with respect to the axial dimension of the elementary rings, can be easily achieved at low cost and with tolerances of precision easy to obtain. Incidentally, but in a non-preferred manner, spacers such as washer or the like may be interposed between the middle element ring and the end element rings to adjust the gap between the support shaft and the inner ring. In addition, these arrangements have the advantage of facilitating the assembly of the inner ring threaded on the support shaft, which is radially guided and spontaneously positioned on the support shaft via the end contact areas corresponding elementary rings.
La solidarisation des bagues élémentaires d'extrémité à la bague intérieure est par exemple réalisée par emmanchement dur. Les bagues élémentaires d'extrémité sont susceptibles d'être en métal, mais sont de préférence en matériau plastique. Cet emmanchement dur est susceptible d'être complété et/ou remplacé par une solidarisation des bagues élémentaires d'extrémité à la bague intérieure réalisée par scellement.The fastening elementary end rings to the inner ring is for example made by hard fitting. The elementary end rings are likely to be metal, but are preferably of plastic material. This hard fitting is likely to be completed and / or replaced by a joining of the elementary end rings to the inner ring made by sealing.
La solidarisation du tourillon indifféremment aux bagues élémentaires d'extrémités et/ou à la bague intérieure est de préférence réalisée par l'intermédiaire d'un bossage de scellement ménagé à chacune des extrémités du tourillon. Un tel bossage est notamment formé à partir d'un apport d'un matériau de scellement tel que cordon de soudure et/ou de colle ou analogue, voire est formé d'une coiffe
rapportée et scellée. Ces dispositions permettent non seulement de solidariser le tourillon aux bagues élémentaires et à la bague intérieure à moindre coût et avec un encombrement réduit, mais aussi visent à interdire une mobilité axiale du tourillon susceptible de provoquer son retrait hors des organes à l'intérieur desquels il s'étend.The joining of the trunnion indifferently to the elementary end rings and / or to the inner ring is preferably carried out by means of a sealing boss provided at each end of the trunnion. Such a boss is formed in particular from a supply of a sealing material such as weld seam and / or glue or the like, or is formed of a cap reported and sealed. These arrangements make it possible not only to secure the trunnion to the elementary rings and to the inner ring at a lower cost and with a smaller overall size, but also to prevent axial mobility of the trunnion which may cause its removal from the organs inside which it extends.
La solidarisation de la bague élémentaire médiane à l'arbre de soutien est de préférence réalisée par scellement. La bague élémentaire médiane est de préférence en métal, acier plus particulièrement.The securing of the middle elementary ring to the support shaft is preferably made by sealing. The middle elementary ring is preferably made of metal, more particularly steel.
De préférence, l'arbre de soutien est muni à sa périphérie d'un élément tubulaire qui est enfilé autour de l'arbre de soutien et sur lequel est solidarisée la bague élémentaire médiane. Cet élément tubulaire est plus particulièrement destiné à permettre une solidarisation robuste par scellement radial entre la bague élémentaire médiane et l'arbre de soutien, en préservant ce dernier de toute altération susceptible de le fragiliser. L'élément tubulaire s'étend notamment sur la majeure partie de l'arbre de soutien pour conforter sa résistance à la flexion, les matériaux constitutifs de l'arbre de soutien et de l'élément tubulaire étant susceptibles d'être néanmoins différents pour éviter un accroissement de la masse globale du rouleau tout en offrant des qualités de résistance mécanique satisfaisantes. L'élément tubulaire et l'arbre de soutien sont de préférence solidarisés entre eux, notamment axialement par scellement, ou encore sont susceptibles d'être simplement emmanchés dur pour permettre un aménagement spécifique de l'arbre de soutien tel qu'il sera décrit plus loin.Preferably, the support shaft is provided at its periphery with a tubular element which is threaded around the support shaft and on which is secured the central elementary ring. This tubular element is more particularly intended to allow a solid connection by radial sealing between the central elementary ring and the support shaft, preserving the latter from any alteration that may weaken it. The tubular element extends over most of the support shaft to reinforce its resistance to bending, the materials constituting the support shaft and the tubular element being likely to be different nevertheless to avoid an increase in the overall mass of the roll while offering satisfactory qualities of mechanical strength. The tubular element and the support shaft are preferably secured to each other, in particular axially by sealing, or they may simply be hard-pressed to allow a specific arrangement of the support shaft as described above. far.
Le volume interne de la cage de roulement est préférentiellement préservé de l'environnement extérieur par des joints, tels que joints à lèvre ou analogues, qu'elle loge en interposition entre la bague extérieure et la bague intérieure, aux extrémités de la cage de roulement notamment.The internal volume of the rolling stand is preferably preserved from the external environment by seals, such as lip seals or the like, that it lodges in the interposition between the outer ring and the inner ring at the ends of the rolling cage. especially.
Le tube externe est de préférence solidarisé à la bague extérieure par l'intermédiaire d'au moins un bouchon de scellement ou analogue. Ces
dispositions visent à conférer une robustesse à moindre coût au rouleau, en interdisant efficacement un mouvement relatif entre le tube externe et la bague extérieure de la cage de roulement, sans pour autant impliquer des tolérances rigoureuses de dimensions relatives entre ces organes, et tout en permettant un remplacement aisé du tube externe en cas de besoin.The outer tube is preferably secured to the outer ring by means of at least one sealing plug or the like. These Provisions are made to provide robustness at a lower cost by roller, effectively preventing relative movement between the outer tube and the outer race of the rolling bearing, without implying strict tolerances of relative dimensions between these members, and while permitting easy replacement of the outer tube when needed.
Tel que visé plus haut, la dimension axiale de l'une quelconque au moins des bagues élémentaires est avantageusement émergente dans la zone de séparation entre l'arbre de soutien et la bague intérieure. Cette bague élémentaire au moins constitue notamment une entretoise de positionnement radial de ces organes l'un par rapport à l'autre en ménageant entre eux l'écart nécessaire au débattement du tube externe autour de l'axe du tourillon.As referred to above, the axial dimension of at least one of the elementary rings is advantageously emerging in the separation zone between the support shaft and the inner ring. This elementary ring at least constitutes in particular a radial positioning spacer of these members relative to each other by providing between them the gap necessary for the displacement of the outer tube about the axis of the trunnion.
Selon un autre aspect de la présente invention, les extrémités de l'arbre de soutien sont chacune avantageusement formées par un arbre de pivotement. L'arbre de soutien est monté coaxialement tournant par rapport aux arbres de pivotement et est équipé de moyens de limitation de sa course en rotation. Cette limitation de course en rotation est notamment réalisée sur une plage angulaire de retournement de l'arbre de soutien déterminée en relation avec l'angle d'inclinaison du tourillon par rapport au plan local de la bande. A titre d'exemple préféré et indicatif, non limitatif quant à la portée de la présente invention, l'angle d'inclinaison du tourillon est de l'ordre de 45° et la plage angulaire de retournement de l'arbre de soutien est de l'ordre de 90°.According to another aspect of the present invention, the ends of the support shaft are each advantageously formed by a pivot shaft. The support shaft is coaxially rotatable relative to the pivot shafts and is provided with means for limiting its rotational stroke. This rotation stroke limitation is in particular carried out on an angular range of turning of the support shaft determined in relation to the angle of inclination of the pin relative to the local plane of the strip. By way of a preferred and indicative example, which is not limiting as to the scope of the present invention, the angle of inclination of the trunnion is of the order of 45 ° and the angular range of inversion of the support shaft is the order of 90 °.
Ces dispositions sont telles que l'organisation de moyens de retournement angulaire de l'arbre de soutien en cas d'inversion de sens de défilement de la bande est réalisée à moindre coût en autorisant des opérations de maintenance aisées, et surtout ne font pas obstacle à un remplacement d'un rouleau de guidage courant par un rouleau de centrage de l'invention, sans avoir à modifier l'installation du convoyeur, et notamment sans avoir à modifier l'agencement des paliers de réception des extrémités de l'arbre de soutien qui seraient initialement adaptés à la réception d'un rouleau de guidage courant.
Le rouleau est plus particulièrement équipé de moyens dynamométriques de retenue d'un retournement angulaire du tube externe en faveur d'un retournement angulaire de l'arbre de soutien sous l'effet d'une tension exercée tangentiellement sur le tube externe par la bande, notamment en cas d'inversion de son sens de défilement.These provisions are such that the organization of means for angular reversal of the support shaft in case of reversal of tape travel direction is achieved at lower cost by allowing easy maintenance operations, and especially do not interfere to replace a current guide roller with a centering roller of the invention, without having to change the installation of the conveyor, and in particular without having to change the arrangement of the receiving bearings of the ends of the shaft. support that would initially be adapted to receive a current guide roller. The roller is more particularly equipped with dynamometric means for retaining an angular reversal of the outer tube in favor of an angular reversal of the support shaft under the effect of a tension exerted tangentially on the outer tube by the strip, especially in case of reversal of its direction of scrolling.
Les dits moyens dynamométriques sont avantageusement constitués par un montage en rotation des arbres de pivotement sur l'arbre de soutien par l'intermédiaire d'au moins un organe de roulement respectif d'un diamètre inférieur à ceux analogues de la cage de roulement. Plus particulièrement pour une tension tangentielle donnée, la différence de couple appliqué à un organe de roulement d'un diamètre inférieur à celui d'un autre organe de roulement respectivement affectés à un arbre de pivotement et au tube externe, est exploitée pour, en cas d'une tension tangentielle exercée par la bande sur le tube externe, induire le cas échéant un retournement angulaire de l'arbre de soutien prioritairement à une rotation de la cage extérieure sur l'organe de roulement qui lui est affecté.Said dynamometric means are advantageously constituted by a rotational mounting of the pivot shafts on the support shaft by means of at least one respective rolling member of a diameter smaller than those of the rolling bearing. More particularly for a given tangential tension, the torque difference applied to a rolling member of a diameter smaller than that of another rolling member respectively assigned to a pivot shaft and to the outer tube, is exploited for, in case a tangential tension exerted by the band on the outer tube, inducing if necessary an angular reversal of the support shaft in priority to a rotation of the outer cage on the rolling member assigned to it.
De telles modalités de réalisation des moyens dynamométriques, préférées en raison de leur simplicité de structure, sont néanmoins susceptibles d'être complétées et/ou substituées par un autre agencement des moyens dynamométriques favorisant un retournement angulaire de l'arbre de soutien par rapport à un retournement angulaire du tube externe en cas d'inversion du sens de défilement de la bande. Par exemple, selon une autre forme de réalisation, les organes de roulement respectivement affectés au tube externe et aux arbres de pivotement peuvent être d'une structure différente offrant à partir de la relativité entre ces structures la constitution des moyens dynamométriques. Par exemple encore, selon une autre forme de réalisation, des moyens dynamométriques spécifiques sont interposés entre les arbres de pivotement et le tube externe et/ou l'un quelconque des organes liés en rotation avec ce dernier.
Les organes de roulement affectés aux arbres de pivotement sont plus particulièrement interposés entre ces derniers et l'élément tubulaire. Cet élément tubulaire est non seulement exploité pour l'assemblage du rouleau tel que visé plus haut, mais aussi est exploité pour être constitutif d'une cage de roulement destinée aux arbres de pivotement. De préférence, le volume intérieur de l'élément tubulaire est préservé de l'environnement extérieur par des joints, tels que joints à lèvre ou analogues, qu'il loge à ses extrémités respectives en interposition entre sa face interne et l'arbre de pivotement correspondant.Such embodiments of the dynamometric means, preferred because of their simplicity of structure, are nonetheless likely to be supplemented and / or substituted by another arrangement of the dynamometric means favoring an angular reversal of the support shaft with respect to a angular reversal of the outer tube in case of reversal of the running direction of the strip. For example, according to another embodiment, the rolling members respectively assigned to the outer tube and the pivot shafts may be of a different structure providing from the relativity between these structures the constitution of the dynamometric means. For example still, according to another embodiment, specific dynamometric means are interposed between the pivot shafts and the outer tube and / or any of the members connected in rotation with the latter. The rolling members assigned to the pivot shafts are more particularly interposed between the latter and the tubular element. This tubular element is not only used for the assembly of the roller as referred to above, but also is used to be a bearing cage for pivoting shafts. Preferably, the internal volume of the tubular element is preserved from the external environment by seals, such as lip seals or the like, which it lodges at its respective ends in interposition between its inner face and the pivot shaft. corresponding.
Les moyens de limitation de la course en rotation de l'arbre de soutien sont par exemple constitués de manière structurellement simple, peu coûteuse et peu encombrante, par des organes coopérants de butée respectivement ménagés sur l'arbre de soutien, et plus particulièrement le cas échéant sur l'élément tubulaire correspondant, et sur l'un quelconque au moins des arbres de pivotement.The means for limiting the rotational travel of the support shaft are, for example, structurally simple, inexpensive and compact, by cooperating abutment members respectively provided on the support shaft, and more particularly the case. on the corresponding tubular element, and on at least one of the pivot shafts.
Selon un autre aspect de la présente invention, le rouleau de centrage est de préférence équipé d'un organe de protection, tel qu'une barre, une plaque ou organe analogue, qui s'étend notamment parallèlement à faible distance extérieure du tube externe. Cet organe de protection est avantageusement porté à ses extrémités par des organes respectifs, tel qu'agencés en platines ou organe analogue, qui sont solidarisés au tube externe au regard de sa mobilité autour de l'axe du tourillon.According to another aspect of the present invention, the centering roller is preferably equipped with a protective member, such as a bar, a plate or similar member, which extends in particular parallel to the short outer distance of the outer tube. This protection member is advantageously carried at its ends by respective members, as arranged in plates or similar member, which are secured to the outer tube with respect to its mobility around the axis of the pin.
Ces dispositions sont telles qu'un débattement du tube externe autour de l'axe du tourillon est accompagné d'un mouvement analogue de l'organe de protection. En outre, la présence de cet organe de protection est d'une incidence modérée sur l'encombrement latéral du rouleau, en évitant d'être notamment porté à ses extrémités par des organes spécifiques installés sur le bâti du convoyeur. En outre et surtout, un tel agencement de l'apport de l'organe de protection au rouleau ne fait pas obstacle à un remplacement d'un rouleau de guidage courant par un rouleau de centrage de l'invention, sans avoir à modifier l'installation du convoyeur.
Les organes porteurs de l'organe de protection sont de préférence solidarisés au tube externe par l'intermédiaire de la cage de roulement, de sorte que le tube externe conserve son intégrité de structure initiale, avec pour avantage de pouvoir être remplacé indépendamment du restant des organes composant le rouleau et donc de limiter les coûts de maintenance.These arrangements are such that a movement of the outer tube around the axis of the trunnion is accompanied by a similar movement of the protective member. In addition, the presence of this protective member has a moderate impact on the lateral size of the roll, avoiding being particularly worn at its ends by specific members installed on the frame of the conveyor. Furthermore and above all, such an arrangement of the contribution of the protective member to the roller does not prevent a replacement of a current guide roller by a centering roller of the invention, without having to modify the conveyor installation. The members carrying the protection member are preferably secured to the outer tube via the rolling cage, so that the outer tube retains its original structure integrity, with the advantage of being able to be replaced independently of the rest of the components of the roll and therefore to reduce maintenance costs.
Chacun des organes porteurs de l'organe de protection est plus spécifiquement solidarisé à la cage de roulement par l'intermédiaire d'une rallonge qui lui est affectée et qui s'étend à l'intérieur du rouleau jusqu'à l'extrémité correspondante de ce dernier. Les rallonges sont notamment placées à l'intérieur du rouleau en interposition entre l'arbre de soutien et le tube externe.Each of the members carrying the protective member is more specifically secured to the rolling cage by means of an extension which is assigned to it and which extends inside the roller to the corresponding end of this last. The extensions are in particular placed inside the roller interposed between the support shaft and the outer tube.
Les organes porteurs de l'organe de protection sont plus particulièrement chacun solidarisés, notamment par leur extrémité correspondante, à la bague intérieure de la cage de roulement. Cette solidarisation est avantageusement réalisée par l'intermédiaire de moyens de prise axiale de la rallonge sur la bague intérieure correspondante.The bearing members of the protective member are more particularly each secured, in particular by their corresponding end, to the inner ring of the bearing housing. This securing is advantageously achieved by means of axial gripping means of the extension on the corresponding inner ring.
Selon une forme préférée de réalisation la rallonge est un tube interne, un bras ou analogue, qui est susceptible d'être en prise axiale directement sur la bague intérieure en étant enfilé sur cette dernière et fixé radialement par au moins un organe de fixation, vis, goupille ou organe analogue notamment. Selon un autre exemple de prise radiale, la rallonge est rapportée sur la bague intérieure par l'intermédiaire d'une bague de fixation qui est porteuse de la rallonge à laquelle elle est solidarisée, par scellement notamment. Une telle bague est par exemple vissée sur la bague interne à l'extrémité correspondante de cette dernière, et est munie d'une collerette ou analogue à laquelle est solidarisée la rallonge correspondante.According to a preferred embodiment the extension is an inner tube, an arm or the like, which is capable of being in axial engagement directly on the inner ring while being threaded on the latter and fixed radially by at least one fastening member, pin or similar organ in particular. According to another example of radial engagement, the extension is attached to the inner ring by means of a fixing ring which carries the extension to which it is secured, particularly by sealing. Such a ring is for example screwed to the inner ring at the corresponding end of the latter, and is provided with a flange or the like to which is secured the corresponding extension.
Les organes porteurs de l'organe de protection sont de préférence rapportés en bout de la rallonge qui lui est affectée par l'intermédiaire de moyens de liaison
facilement réversible pour permettre une mise en place et/ou un retrait qui soient rapides et aisés. Par exemple, ces moyens de liaison sont du type par emboîtement mettant en œuvre des organes coopérants respectivement ménagés sur le tube et sur les organes porteurs de l'organe de protection, ou encore sont du type par vissage. Plus particulièrement, la rallonge étant constituée d'un tube interne, celui-ci est muni à son bout correspondant d'un flasque, qui est notamment rapporté par scellement en bout du tube interne. Les organes porteurs de l'organe de protection sont rapportés sur les flasques par l'intermédiaire de vis ou analogues.The members carrying the protection member are preferably attached at the end of the extension which is assigned to it by means of connecting means. easily reversible to allow quick and easy placement and / or removal. For example, these connecting means are of the interlocking type implementing cooperating members respectively formed on the tube and on the bearing members of the protective member, or are of the type by screwing. More particularly, the extension being constituted by an inner tube, the latter is provided at its corresponding end with a flange, which is in particular reported by sealing at the end of the inner tube. The bearing members of the protective member are attached to the flanges by means of screws or the like.
L'organe de protection est de préférence équipé de moyens de réglage de sa position par rapport au tube externe. Ces moyens de réglage sont par exemple constitués par une coopération entre des organes de fixation et/ou d'emboîtement et des lumières de réception de ces organes, qui sont indifféremment affectés à l'organe de protection, aux organes porteurs de ce dernier et à la rallonge. Plus particulièrement, les moyens de réglage sont indifféremment placés en interposition entre l'organe de protection et les organes qui le portent, et/ou entre les organes porteurs de l'organe de protection et la rallonge à laquelle ils sont fixés. De tels moyens de réglage sont susceptibles d'être indifféremment à variation continue et/ou à variation discrète de la position de l'organe de protection par rapport au tube externe.The protective member is preferably equipped with means for adjusting its position relative to the outer tube. These adjustment means are for example constituted by a cooperation between fasteners and / or interlocking and receiving lights of these organs, which are indifferently assigned to the protective member, the bearing members of the latter and to the extension. More particularly, the adjustment means are indifferently placed in interposition between the protective member and the bodies which carry it, and / or between the members carrying the protective member and the extension to which they are attached. Such adjustment means may be indifferently continuous variation and / or discrete variation of the position of the protective member relative to the outer tube.
Par exemple, les moyens de réglage sont constitués par des organes, tels que vis ou analogue, de fixation de l'organe de protection sur les organes qui le portent. Ces vis de fixation traversent les organes porteurs de l'organe de protection à travers une lumière oblongue respective qui est orientée transversalement au plan local de la bande. L'organe de protection est par exemple constitué d'une plaque épaisse en matériau plastique fixée à ses bouts correspondants aux organes qui le portent par l'intermédiaire des organes de fixation qui le pénètrent.For example, the adjustment means are constituted by members, such as screws or the like, for fixing the protective member on the members that carry it. These fixing screws pass through the members carrying the protection member through a respective oblong slot which is oriented transversely to the local plane of the strip. The protective member is for example consisting of a thick plate of plastic material attached to its corresponding ends to the organs that carry it through the fasteners that penetrate.
Les différents moyens de scellement mis en œuvre sont notamment des moyens du type par soudage, par brasage avec apport d'un matériau fusible de soudure
plus particulièrement, et/ou du type par collage ou autres techniques analogues. La mise en œuvre de tels moyens de scellement offre une fiabilité et une robustesse satisfaisantes, qui permet de simplifier la structure et de réduire l'encombrement diamétral notamment du rouleau, et qui permet de simplifier les opérations d'assemblage du rouleau.The various sealing means used are, in particular, means of the type by welding, by brazing with the addition of a solder fusible material. more particularly, and / or of the type by gluing or other similar techniques. The implementation of such sealing means offers satisfactory reliability and robustness, which simplifies the structure and reduces the diametral bulk including the roller, and which simplifies the assembly operations of the roller.
Description des figures.Description of the figures.
La présente invention sera mieux comprise, et des détails en relevant apparaîtront, à la lecture de la description qui va en être faite d'exemples de réalisation en relation avec les figures des planches annexées, dans lesquelles :The present invention will be better understood, and details will arise from reading the description which will be made of embodiments in connection with the figures of the attached plates, in which:
Les fig.1 et fig.2 sont des vues en coupe axiale suivant des plans respectivement orthogonaux d'un rouleau de centrage selon une première variante de réalisation de la présente invention. La fig.3 est une vue en coupe radiale du rouleau de centrage représenté sur les fig.1 et fig.2.Fig.1 and fig.2 are views in axial section along respectively orthogonal planes of a centering roller according to a first embodiment of the present invention. Fig.3 is a radial sectional view of the centering roller shown in Fig.1 and Fig.2.
La fig.4 est un détail en coupe axiale de l'extrémité d'un rouleau de centrage selon une deuxième variante de réalisation de la présente invention.Fig.4 is a detail in axial section of the end of a centering roller according to a second embodiment of the present invention.
Les fig.5 et fig.6 sont des illustrations en vue partielle d'un rouleau de centrage selon une troisième variante de réalisation de la présente invention, respectivement en coupe axiale et vu de bout.Figures 5 and 6 are partial view illustrations of a centering roller according to a third embodiment of the present invention, respectively in axial section and seen end.
Sur les figures, un rouleau de centrage est destiné à équiper un convoyeur à bande pour corriger spontanément un éventuel déport latéral de la bande circulant sur le rouleau. Plus particulièrement, dans le cas où la bande glisse latéralement sur le rouleau, la surface sur laquelle circule la bande est spontanément inclinée d'un angle A par rapport à l'axe principal Bl de rotation du rouleau, tant latéralement que par rapport au plan local de la bande. A titre indicatif, cet angle A est d'une valeur pouvant s'étendre jusqu'à 5°. On notera que les dispositions de la présente invention offrent un excellent compromis entre l'obtention d'une telle valeur de débattement du tube externe, et un encombrement diamétral réduit du rouleau.
Sur les fig.1 à fig.3, le rouleau est principalement composé d'un tube externe 1 à la surface duquel la bande est destinée à circuler. Le tube externe 1 est monté tournant sur un arbre de soutien 2, dont les extrémités sont destinées à être supportées par des paliers latéraux. Les extrémités de l'arbre de soutien 2 comportent à leur surface extérieure des méplats 3 destinés à coopérer avec un logement de forme complémentaire des paliers, de manière à immobiliser l'arbre de soutien 2 en rotation tandis que le tube externe 1 accompagne par un mouvement tournant le défilement de la bande. Le tube externe 1 est coaxialement supporté par l'arbre de soutien 2 par l'intermédiaire d'une cage de roulement 4, comprenant un couple d'organes de roulement 5 placés à ses extrémités. Cette cage de roulement 4 comporte une bague extérieure 6 en prise sur le tube externe 1 , et une bague intérieure 7 immobilisée en rotation autour de l'axe général Bl du rouleau. Pour permettre la correction du centrage de la bande sur le rouleau, le tube externe 1 est monté pivotant autour de l'axe B2 d'un tourillon 8 qui est orienté orthogonalement à l'axe de rotation Bl du rouleau. Pour un bon fonctionnement du rouleau, le tourillon 8 sera par ailleurs orienté de manière inclinée par rapport au plan local de la bande. Cette inclinaison, à titre indicatif de l'ordre de 45°, est notamment conférée au tourillon 8 à partir de l'agencement des paliers recevant les extrémités de l'arbre de soutien 2. En cela, l'orientation du tourillon 8 est déterminée par rapport à l'orientation du plan général des méplats 3 que comporte l'arbre de soutien 2. Sur l'exemple illustré, l'orientation du tourillon 8 est parallèle au plan général des méplats 3.In the figures, a centering roller is intended to equip a belt conveyor to spontaneously correct any lateral offset of the band traveling on the roller. More particularly, in the case where the band slips laterally on the roll, the surface on which the strip travels is spontaneously inclined at an angle A with respect to the main axis B1 of rotation of the roll, both laterally and relative to the plane local band. As an indication, this angle A is of a value that can extend up to 5 °. It will be noted that the provisions of the present invention offer an excellent compromise between obtaining such a displacement value of the outer tube, and a reduced diametral size of the roll. In fig.1 to fig.3, the roller is mainly composed of an outer tube 1 on the surface of which the strip is intended to circulate. The outer tube 1 is rotatably mounted on a support shaft 2, the ends of which are intended to be supported by lateral bearings. The ends of the support shaft 2 comprise on their outer surface flats 3 intended to cooperate with a housing of complementary shape of the bearings, so as to immobilize the support shaft 2 in rotation while the outer tube 1 accompanies by a movement turning the scroll of the band. The outer tube 1 is coaxially supported by the support shaft 2 via a rolling cage 4, comprising a pair of rolling members 5 placed at its ends. This rolling cage 4 comprises an outer ring 6 engaged on the outer tube 1, and an inner ring 7 immobilized in rotation around the general axis B1 of the roll. To allow correction of the centering of the strip on the roll, the outer tube 1 is pivotally mounted about the axis B2 of a pin 8 which is oriented orthogonally to the axis of rotation Bl of the roll. For proper operation of the roller, the pin 8 will also be inclined with respect to the local plane of the strip. This inclination, as an indication of the order of 45 °, is in particular imparted to the trunnion 8 from the arrangement of the bearings receiving the ends of the support shaft 2. In this, the orientation of the trunnion 8 is determined relative to the orientation of the general plane of the flats 3 that comprises the support shaft 2. In the illustrated example, the orientation of the pin 8 is parallel to the general plane of the flats 3.
Le tourillon 8 est solidaire de la bague interne 7, et est monté librement tournant à l'intérieur de l'arbre de soutien 2. Selon une autre variante de réalisation analogue non représentée, le tourillon 8 est monté tournant à l'intérieur de la bague interne 7, et est solidaire de l'arbre de soutien 2. Plus particulièrement, le tourillon 8 est enfilé à l'intérieur d'une bague de pivotement subdivisée en trois bagues élémentaires, dont deux bagues élémentaires d'extrémité 9 solidaires de la bague intérieure 7 et une bague élémentaire médiane 10 solidaire de l'arbre de soutien 2. On notera que sans sortir du cadre de l'invention, une analogie de mauvaise
qualité consisterait à subdiviser la bague de pivotement en seulement deux bagues élémentaires, l'une unique d'extrémité 9 et l'autre médiane 10. Cependant cette analogie, quoique fonctionnellement équivalente, ne présenterait pas des qualités satisfaisantes d'équilibrage et de robustesse du rouleau de centrage.The pin 8 is secured to the inner ring 7, and is mounted freely rotating inside the support shaft 2. According to another variant embodiment similar not shown, the pin 8 is rotatably mounted inside the inner ring 7, and is integral with the support shaft 2. More particularly, the pin 8 is threaded inside a pivot ring subdivided into three elementary rings, including two elementary end rings 9 integral with the inner ring 7 and a middle elementary ring 10 secured to the support shaft 2. Note that without departing from the scope of the invention, an analogy of bad quality would consist in subdividing the pivot ring into only two elementary rings, a single end 9 and the other median 10. However, this analogy, although functionally equivalent, would not have satisfactory balancing and robustness of the centering roller.
Les bagues élémentaires 9,10 sont solidarisées à l'organe auquel elle sont affectées par scellement, et plus particulièrement par brasage. Plus particulièrement, les bagues élémentaires 9,10 sont solidarisées respectivement à la bague intérieure 7 et à l'arbre de soutien 2 par l'intermédiaire de cordons de soudure périphériques. Le tourillon 8 est solidarisé aux bagues élémentaires d'extrémité 9 et/ou à la bague intérieure 7 par l'intermédiaire d'un bossage 11 de scellement formé par un cordon de soudure. Ce bossage 11 constitue un organe robuste à rencontre d'un déplacement axial du tourillon 8. Les bagues élémentaires d'extrémité 9 sont emmanchées dur à l'intérieur de logements respectifs qui sont préalablement ménagés à travers la bague intérieure 7. La bague élémentaire médiane 10 est soudée à l'arbre de soutien 2 par l'intermédiaire d'un élément tubulaire 12 enfilé sur ce dernier. Sur la variante de réalisation illustrée sur les fig.1 à fig.3, cet élément tubulaire 12 est soudé à ses extrémités sur l'arbre de soutien 2 avec lequel il forme un ensemble monobloc.The elementary rings 9, 10 are secured to the member to which they are affected by sealing, and more particularly by brazing. More particularly, the elementary rings 9, 10 are respectively secured to the inner ring 7 and to the support shaft 2 via peripheral weld seams. The pin 8 is secured to the elementary end rings 9 and / or to the inner ring 7 via a sealing boss 11 formed by a weld seam. This boss 11 constitutes a robust member against an axial displacement of the pin 8. The elementary end rings 9 are fitted hard inside respective housings which are previously formed through the inner ring 7. The middle elementary ring 10 is welded to the support shaft 2 by means of a tubular element 12 threaded on the latter. In the embodiment variant illustrated in FIGS. 1 to 3, this tubular element 12 is welded at its ends to the support shaft 2 with which it forms a one-piece assembly.
Les bagues d'extrémité 9 se prolongent au-delà de l'épaisseur de la bague intérieure 7 vers la bague médiane 10. Ce prolongement est destiné à positionner radialement la bague intérieure 7 par rapport à l'arbre de soutien 2, en ménageant un écart entre eux nécessaire pour permettre le pivotement du tube externe 1 autour de l'axe B2 du tourillon 8.The end rings 9 extend beyond the thickness of the inner ring 7 towards the middle ring 10. This extension is intended to position the inner ring 7 radially relative to the support shaft 2, by providing a gap between them necessary to allow the pivoting of the outer tube 1 around the axis B2 of the pin 8.
Le tube externe 1 est solidarisé à la bague extérieure 6 par l'intermédiaire de bouchons de soudure 13. Ces bouchons de soudure 13 sont rapportés à l'intérieur de fenêtres préalablement ménagées à travers le tube externe 6, et sont formés à partir d'un matériau de scellement, et notamment d'un matériau fusible de brasage. D'une manière générale, il est recherché de solidariser le tube externe 1 à la bague extérieure, quelle que soit la méthode utilisée. Cependant,
une telle solidarisation par l'intermédiaire de bouchons de scellement tels que 13, permet d'obtenir une telle solidarisation qui est fiable, simple à réaliser et peu coûteuse.The outer tube 1 is secured to the outer ring 6 by means of weld plugs 13. These weld plugs 13 are attached inside windows previously formed through the outer tube 6, and are formed from a sealing material, and in particular a fuse soldering material. In general, it is desired to secure the outer tube 1 to the outer ring, whatever the method used. However, such a fastening through sealing plugs such as 13, provides such a fastening that is reliable, simple to perform and inexpensive.
Des joints à lèvres 14 ou analogues sont placés aux extrémités de la cage de roulement 4, pour préserver son volume intérieur vis-à-vis de l'environnement extérieur et pour garantir l'étanchéité de cette dernière.Lip seals 14 or the like are placed at the ends of the rolling stand 4, to preserve its internal volume vis-à-vis the external environment and to ensure the tightness of the latter.
Sur la fig.4, les extrémités de l'arbre de soutien 2 sont constituées par des arbres de pivotement 15, de sorte qu'un retournement angulaire de l'arbre de soutien 2 autour de l'axe général Bl du rouleau soit spontanément provoqué en cas d'une inversion du sens de défilement de la bande. L'arbre de soutien 2 est monté tournant sur les arbres de pivotement 15 par l'intermédiaire d'organes de roulement 16. L'amplitude du retournement angulaire de l'arbre de soutien 2 est déterminée par des moyens 17 de limitation de sa course en rotation, constitués dans des organes de butée 18,19 coopérants respectivement ménagés sur l'arbre de soutien 2 et sur au moins l'un des arbres de pivotement 15. Cette amplitude correspond à titre indicatif à une plage angulaire comprise entre 60° et 90°, selon l'inclinaison déterminée du tourillon 8 par rapport au plan local de circulation de la bande. Sur l'exemple de réalisation illustré, ces organes de butée sont constitués pour l'un par un doigt 18 ou analogue solidaire de l'arbre de soutien 2, et pour l'autre par une saignée 19 ménagée en périphérie de l'arbre de pivotement 15. D'autres moyens 17 de limitation de course analogues peuvent être utilisés et/ou être différemment agencés sans sortir du cadre de la présente invention.In FIG. 4, the ends of the support shaft 2 are constituted by pivoting shafts 15, so that an angular reversal of the support shaft 2 around the general axis B1 of the roller is spontaneously caused. in case of a reversal of the tape direction. The support shaft 2 is rotatably mounted on the pivot shafts 15 by means of rolling members 16. The amplitude of the angular reversal of the support shaft 2 is determined by means 17 for limiting its stroke. in rotation, constituted by cooperating abutment members 18, 19 respectively formed on the support shaft 2 and on at least one of the pivoting shafts 15. This amplitude corresponds as a guide to an angular range between 60.degree. 90 °, according to the determined inclination of the pin 8 relative to the local plane of circulation of the strip. In the exemplary embodiment illustrated, these abutment members are constituted for one by a finger 18 or the like integral with the support shaft 2, and for the other by a groove 19 formed on the periphery of the shaft. Pivoting 15. Other analog stroke limiting means 17 may be used and / or be differently arranged without departing from the scope of the present invention.
II doit être entendu que pour un fonctionnement correct du dispositif, le retournement de l'arbre de soutien 2 doit intervenir à partir d'un seuil prédéterminé de tension exercée par la bande à la surface du tube externe 1 et préalablement à une faculté de retournement angulaire de ce dernier. C'est pourquoi, le rouleau comporte des moyens dynamométriques permettant une telle priorité de retournement angulaire de l'arbre de soutien 2. Sur la variante de réalisation illustrée, ces moyens dynamométriques sont constitués par une différence de
diamètre entre les organes de roulement 5 affectés à la rotation du tube externe 1 et les organes de roulement 16 affectés au retournement angulaire de l'arbre de soutien 2.It should be understood that for correct operation of the device, the overturning of the support shaft 2 must take place from a predetermined threshold of tension exerted by the strip on the surface of the outer tube 1 and before a reversal faculty angular of the latter. This is why the roller comprises dynamometric means allowing such angular reversal priority of the support shaft 2. In the variant embodiment illustrated, these dynamometric means consist of a difference of diameter between the rolling members 5 assigned to the rotation of the outer tube 1 and the rolling members 16 assigned to the angular reversal of the support shaft 2.
L'élément tubulaire 12 associé à l'arbre de soutien 2 est exploité pour recevoir l'arbre de pivotement 15 et les organes de roulement 16 correspondants. Notamment, cet élément tubulaire 12 se prolonge axialement au-delà de l'arbre de soutien 2, pour permettre de recevoir les organes de roulement 16. Des joints 20, tels que joints à lèvres ou analogues, permettent de préserver le volume intérieur de l'élément tubulaire 12.The tubular element 12 associated with the support shaft 2 is used to receive the pivot shaft 15 and the corresponding rolling members 16. In particular, this tubular element 12 extends axially beyond the support shaft 2, to allow to receive the rolling members 16. Joints 20, such as lip seals or the like, make it possible to preserve the internal volume of the body. tubular element 12.
Sur les fig.5 et fig.6, le rouleau est équipé d'un organe de protection 21 , constitué d'une plaque s'étendant à proximité de la surface extérieure du tube externe 1. Cet organe de protection 21 est supporté à ses extrémités par des platines 22 qui sont solidarisées au tube externe 1 , par l'intermédiaire de la bague intérieure 7 de la cage de roulement 4. Ces dispositions visent à maintenir la distance relative entre l'organe de protection 21 et le tube externe 1 nonobstant la faculté de ce dernier à pivoter autour de l'axe B2 du tourillon 8.In FIGS. 5 and 6, the roller is equipped with a protective member 21 consisting of a plate extending close to the outer surface of the outer tube 1. This protection member 21 is supported at its ends. ends by plates 22 which are secured to the outer tube 1, through the inner ring 7 of the rolling shaft 4. These provisions are intended to maintain the relative distance between the protective member 21 and the outer tube 1 notwithstanding the ability of the latter to rotate around the axis B2 of the pin 8.
Les platines 22 sont solidaires de la bague intérieure 7 par l'intermédiaire d'une rallonge 23 formée d'un tube interne, qui est rapporté en bout de la bague intérieure 7 par l'intermédiaire d'une bague de fixation 24. Cette bague de fixation 24 est vissée à l'extrémité de la bague intérieure 7, et est immobilisée en rotation par goupillage tel qu'au moyen d'une vis de fixation 25 sur l'exemple illustré. La bague de fixation 24 comporte une collerette 26 sur laquelle est fixée la rallonge 23 par scellement, tel que par soudage ou analogue. Les platines 22 sont fixées à la rallonge 23 par des vis de fixation 27 leur conférant un caractère amovible, pour permettre un retrait et une mise en place rapides et aisés de l'organe de protection 21 sur le rouleau. Ces vis de fixation 27 sont en prise sur un flasque d'extrémité 28 rapporté en bout de la rallonge 23, par scellement tel que par soudage notamment.
Les platines 22 supportent l'organe de protection 21 par l'intermédiaire de moyensThe plates 22 are integral with the inner ring 7 by means of an extension 23 formed of an inner tube, which is attached at the end of the inner ring 7 by means of a fixing ring 24. This ring 24 is screwed to the end of the inner ring 7, and is immobilized in rotation by pinning such that by means of a fixing screw 25 in the example shown. The fixing ring 24 comprises a flange 26 on which the extension 23 is fixed by sealing, such as by welding or the like. The plates 22 are fixed to the extension 23 by fixing screws 27 conferring on them a removable character, to allow a quick and easy removal and installation of the protective member 21 on the roll. These fixing screws 27 are engaged on an end flange 28 attached to the end of the extension 23, by sealing such as by welding in particular. The plates 22 support the protection member 21 via means
29 de réglage de la position de ce dernier par rapport au tube externe 1. Sur l'exemple de réalisation illustré, ces moyens 29 associent des lumières oblongues29 of adjustment of the position of the latter relative to the outer tube 1. In the embodiment shown, these means 29 combine oblong lights
30 ménagées à travers les platines 22 pour le passage d'organes 31, tels que vis ou analogues, de fixation de l'organe de protection 21 sur les platines 22. Des dispositions analogues de réglage de la position de l'organe de protection 21 peuvent être prises sans sortir du cadre de l'invention.
30 formed through the plates 22 for the passage of members 31, such as screws or the like, for fixing the protective member 21 on the plates 22. Similar arrangements for adjusting the position of the protective member 21 can be taken without departing from the scope of the invention.
Claims
1.- Rouleau de centrage pour convoyeur à bande, ce rouleau comprenant un arbre de soutien (2) coaxial d'un tube externe (1) par l'intermédiaire d'au moins une cage de roulement (4) interposée entre le tube externe (1) et l'arbre de soutien (2), cette cage de roulement (4) logeant au moins un organe de roulement (5) et comprenant une bague extérieure (6) en prise sur le tube externe (1) et une bague intérieure (7) montée pivotante sur l'arbre de soutien (2) par l'intermédiaire d'un tourillon (8) orienté orthogonalement à l'axe Bl du rouleau, caractérisé en ce que le tourillon (8) est monté sur le rouleau par l'intermédiaire d'une bague de pivotement subdivisée en trois bagues élémentaires (9,10) coaxiales, dont deux bagues élémentaires d'extrémités (9) solidaires de la bague intérieure (7) et dont une bague élémentaire médiane (10) solidaire de l'arbre de soutien (2), le tourillon (8) étant indifféremment solidaire de l'une au moins des bagues élémentaires d'extrémités (9) et/ou de la bague élémentaire médiane (10) en étant inversement libre en rotation à l'intérieur de l'autre quelconque de la bague élémentaire médiane (10) et/ou des bagues élémentaires d'extrémité1.- centering roller for conveyor belt, this roller comprising a support shaft (2) coaxial with an outer tube (1) via at least one rolling cage (4) interposed between the outer tube (1) and the support shaft (2), this rolling cage (4) housing at least one rolling member (5) and comprising an outer ring (6) engaged on the outer tube (1) and a ring sleeve (7) pivotally mounted on the support shaft (2) via a pin (8) oriented orthogonal to the axis B1 of the roller, characterized in that the pin (8) is mounted on the roller by means of a pivoting ring subdivided into three coaxial elementary rings (9, 10), including two elementary end rings (9) integral with the inner ring (7) and of which a middle elementary ring (10) integral with of the support shaft (2), the journal (8) being indifferently attached to at least one of the elementary rings of the ends (9) and / or the medial elementary ring (10) being inversely free to rotate within the other of the middle elementary ring (10) and / or elementary end rings
(9).(9).
2 - Rouleau de centrage selon la revendication 1 , caractérisé en ce que la solidarisation des bagues élémentaires d'extrémité (9) à la bague intérieure (7) est réalisée par emmanchement dur.2 - centering roller according to claim 1, characterized in that the fastening of the elementary end rings (9) to the inner ring (7) is formed by hard fitting.
3.- Rouleau de centrage selon l'une quelconque des revendications précédentes, caractérisé en ce que la solidarisation des bagues élémentaires d'extrémité (9) à la bague intérieure (7) est réalisée par scellement.3.- centering roller according to any one of the preceding claims, characterized in that the fastening of the elementary end rings (9) to the inner ring (7) is made by sealing.
4.- Rouleau de centrage selon l'une quelconque des revendications précédentes, caractérisé en ce que la solidarisation du tourillon (8) indifféremment aux bagues élémentaires d'extrémités (9) et/ou à la bague intérieure (7) est réalisée par l'intermédiaire d'un bossage (11) de scellement ménagé à chacune des extrémités du tourillon (8).4.- centering roller according to any one of the preceding claims, characterized in that the fastening of the trunnion (8) indifferently to the elementary rings ends (9) and / or the ring interior (7) is formed by means of a boss (11) sealing provided at each end of the pin (8).
5.- Rouleau de centrage selon l'une quelconque des revendications précédentes, caractérisé en ce que la solidarisation de la bague élémentaire médiane (10) à l'arbre de soutien (2) est réalisée par scellement.5.- centering roller according to any one of the preceding claims, characterized in that the fastening of the central elementary ring (10) to the support shaft (2) is made by sealing.
6.- Rouleau de centrage selon l'une quelconque des revendications précédentes, caractérisé en ce que l'arbre de soutien (2) est muni à sa périphérie d'un élément tubulaire (12) qui est enfilé autour de l'arbre de soutien (2) et sur lequel est solidarisée la bague élémentaire médiane (10).6. Roll centering according to any one of the preceding claims, characterized in that the support shaft (2) is provided at its periphery with a tubular element (12) which is threaded around the support shaft (2) and on which is secured the central elementary ring (10).
7.- Rouleau de centrage selon l'une quelconque des revendications précédentes, caractérisé en ce que le tube externe (1) est solidarisé à la bague extérieure (6) par l'intermédiaire d'au moins un bouchon de scellement (13).7.- centering roller according to any one of the preceding claims, characterized in that the outer tube (1) is secured to the outer ring (6) via at least one sealing plug (13).
8.- Rouleau de centrage selon l'une quelconque des revendications précédentes, caractérisé en ce que la dimension axiale de l'une quelconque au moins des bagues élémentaires (9,10) est émergente dans la zone de séparation entre l'arbre de soutien (2) et la bague intérieure (7), cette bague élémentaire (9,10) au moins constituant une entretoise de positionnement radial de ces organes l'un par rapport à l'autre en ménageant entre eux l'écart nécessaire au débattement du tube externe (1) autour de l'axe B2 du tourillon (8).8. Roll centering according to any one of the preceding claims, characterized in that the axial dimension of at least one of the elementary rings (9,10) is emerging in the separation zone between the support shaft (2) and the inner ring (7), this elementary ring (9,10) at least constituting a radial positioning spacer of these bodies relative to each other by providing the gap between them necessary to the deflection of the outer tube (1) about the axis B2 of the pin (8).
9.- Rouleau de centrage selon l'une quelconque des revendications précédentes, caractérisé en ce que les extrémités de l'arbre de soutien (2) sont chacune formées par un arbre de pivotement (15), l'arbre de soutien (2) étant monté coaxialement tournant par rapport aux arbres de pivotement9. A centering roller according to any one of the preceding claims, characterized in that the ends of the support shaft (2) are each formed by a pivot shaft (15), the support shaft (2) being coaxially rotatable relative to the pivot shafts
(15) et étant équipé de moyens (17) de limitation de sa course en rotation. (15) and being equipped with means (17) for limiting its rotational stroke.
10.- Rouleau de centrage selon la revendication 9, caractérisé en ce que le rouleau est équipé de moyens dynamométriques de retenue d'un retournement angulaire du tube externe (1) en faveur d'un retournement angulaire de l'arbre de soutien (2) sous l'effet d'une tension exercée tangentiellement sur le tube externe (1).10. A centering roller according to claim 9, characterized in that the roller is equipped with load bearing means of an angular reversal of the outer tube (1) in favor of an angular reversal of the support shaft (2). ) under the effect of a tension exerted tangentially on the outer tube (1).
11.- Rouleau de centrage selon la revendication 10, caractérisé en ce que les dits moyens dynamométriques sont constitués par un montage en rotation des arbres de pivotement (15) sur l'arbre de soutien (2) par l'intermédiaire d'au moins un organe de roulement respectif (16) d'un diamètre inférieur à ceux analogues (5) de la cage de roulement (4).11. A centering roller according to claim 10, characterized in that said dynamometric means are constituted by a rotational mounting of the pivot shafts (15) on the support shaft (2) via at least one a respective rolling member (16) of smaller diameter than the like (5) of the rolling stand (4).
12.- Rouleau de centrage selon la revendication 9, caractérisé en ce que les organes de roulement (16) affectés aux arbres de pivotement (15) sont interposés entre ces derniers et l'élément tubulaire (12).12.- centering roller according to claim 9, characterized in that the rolling members (16) assigned to the pivot shafts (15) are interposed between them and the tubular element (12).
13.- Rouleau de centrage selon l'une quelconque des revendications 9 à 12, caractérisé en ce que les moyens (17) de limitation de la course en rotation de l'arbre de soutien (2) sont constitués par des organes coopérants de butée (18,19) respectivement ménagés sur l'arbre de soutien (2) et sur l'un quelconque au moins des arbres de pivotement (15).13. A centering roller according to any one of claims 9 to 12, characterized in that the means (17) for limiting the rotational stroke of the support shaft (2) consist of cooperating abutment members. (18,19) respectively provided on the support shaft (2) and on at least one of the pivot shafts (15).
14.- Rouleau de centrage selon l'une quelconque des revendications précédentes, caractérisé en ce qu'il est équipé d'un organe de protection (21) qui s'étend parallèlement à faible distance extérieure du tube externe14.- centering roller according to any one of the preceding claims, characterized in that it is equipped with a protective member (21) which extends parallel to the short outer distance of the outer tube
(1), et qui est porté à ses extrémités par des organes respectifs (22) qui sont solidarisés au tube externe (1) au regard de sa mobilité autour de l'axe B2 du tourillon (8).(1), and which is carried at its ends by respective members (22) which are secured to the outer tube (1) with respect to its mobility around the axis B2 of the pin (8).
15.- Rouleau de centrage selon la revendication 14, caractérisé en ce que les organes (22) porteurs de l'organe de protection (21) sont solidarisés au tube externe (1) par l'intermédiaire de la cage de roulement (4). 15.- centering roller according to claim 14, characterized in that the members (22) bearing the protective member (21) are secured to the outer tube (1) via the rolling cage (4) .
16.- Rouleau de centrage selon la revendication 15, caractérisé en ce que chacun des organes (22) porteurs de l'organe de protection (21) est solidarisé à la cage de roulement (4) par l'intermédiaire d'une rallonge (23) qui lui est affectée et qui s'étend à l'intérieur du rouleau jusqu'à l'extrémité correspondante de ce dernier.16.- centering roller according to claim 15, characterized in that each of the members (22) carrying the protective member (21) is secured to the rolling cage (4) via an extension ( 23) which is assigned to it and which extends inside the roll to the corresponding end thereof.
17.- Rouleau de centrage selon la revendication 16, caractérisé en ce que les rallonges (23) sont plus particulièrement chacune solidarisées à la bague intérieure (7) de la cage de roulement (4) par l'intermédiaire de moyens (24) de prise axiale de la rallonge (23) sur la bague intérieure (7) correspondante.17.- centering roller according to claim 16, characterized in that the extensions (23) are more particularly each secured to the inner ring (7) of the rolling cage (4) via means (24) of axial catch of the extension (23) on the corresponding inner ring (7).
18.- Rouleau de centrage selon l'une quelconque des revendications 16 et 17, caractérisé en ce que les organes (22) porteurs de l'organe de protection (21) sont rapportés en bout de la rallonge (23) par l'intermédiaire de moyens de liaison (27) facilement réversible.18.- centering roller according to any one of claims 16 and 17, characterized in that the members (22) bearing the protective member (21) are attached at the end of the extension (23) via connecting means (27) easily reversible.
19.- Rouleau de centrage selon l'une quelconque des revendications 14 à 18, caractérisé en ce que l'organe de protection (21) est équipé de moyens (29) de réglage de sa position par rapport au tube externe (1).19.- centering roller according to any one of claims 14 to 18, characterized in that the protective member (21) is equipped with means (29) for adjusting its position relative to the outer tube (1).
20.- Rouleau de centrage selon la revendication 19, caractérisé en ce que les moyens de réglage (29) sont indifféremment placés en interposition entre l'organe de protection (21) et les organes (22) qui le portent, et/ou entre les organes (22) porteurs de l'organe de protection (21) et la rallonge (23) à laquelle ils sont fixés, et sont indifféremment à variation continue et/ou à variation discrète de la position de l'organe de protection (21) par rapport au tube externe (1). 20.- centering roller according to claim 19, characterized in that the adjusting means (29) are indifferently placed in interposition between the protective member (21) and the members (22) which carry it, and / or between the members (22) carrying the protective member (21) and the extension (23) to which they are attached, and are either continuously variable and / or discretely varying the position of the protective member (21). ) relative to the outer tube (1).
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/IB2007/001809 WO2009004397A1 (en) | 2007-07-02 | 2007-07-02 | Roller for a travelling belt conveyor arranged to produce spontaneous centring of the belt on its guide path |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/IB2007/001809 WO2009004397A1 (en) | 2007-07-02 | 2007-07-02 | Roller for a travelling belt conveyor arranged to produce spontaneous centring of the belt on its guide path |
Publications (1)
Publication Number | Publication Date |
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WO2009004397A1 true WO2009004397A1 (en) | 2009-01-08 |
Family
ID=39200059
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/IB2007/001809 WO2009004397A1 (en) | 2007-07-02 | 2007-07-02 | Roller for a travelling belt conveyor arranged to produce spontaneous centring of the belt on its guide path |
Country Status (1)
Country | Link |
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WO (1) | WO2009004397A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN114751149A (en) * | 2022-05-27 | 2022-07-15 | 郑帅 | Carrier roller with function of rectifying |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2330923A (en) * | 1941-05-15 | 1943-10-05 | Robins Conveying Belt Co | Training device for conveyer belts |
WO1996009237A1 (en) * | 1994-09-20 | 1996-03-28 | Alucais Inc. | Conveyor tracking idler |
WO2000075054A1 (en) * | 1999-06-08 | 2000-12-14 | Roxon Oy | A tiltable guide roller |
-
2007
- 2007-07-02 WO PCT/IB2007/001809 patent/WO2009004397A1/en active Application Filing
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2330923A (en) * | 1941-05-15 | 1943-10-05 | Robins Conveying Belt Co | Training device for conveyer belts |
WO1996009237A1 (en) * | 1994-09-20 | 1996-03-28 | Alucais Inc. | Conveyor tracking idler |
WO2000075054A1 (en) * | 1999-06-08 | 2000-12-14 | Roxon Oy | A tiltable guide roller |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN114751149A (en) * | 2022-05-27 | 2022-07-15 | 郑帅 | Carrier roller with function of rectifying |
CN114751149B (en) * | 2022-05-27 | 2023-07-25 | 宝科机械股份有限公司 | Carrier roller with deviation correcting function |
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