WO2011101500A1 - Positioning system for positioning a bushing on a mandrel, bushing and mandrel suitable for use on a roller of a printing machine - Google Patents

Positioning system for positioning a bushing on a mandrel, bushing and mandrel suitable for use on a roller of a printing machine Download PDF

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Publication number
WO2011101500A1
WO2011101500A1 PCT/ES2010/000450 ES2010000450W WO2011101500A1 WO 2011101500 A1 WO2011101500 A1 WO 2011101500A1 ES 2010000450 W ES2010000450 W ES 2010000450W WO 2011101500 A1 WO2011101500 A1 WO 2011101500A1
Authority
WO
WIPO (PCT)
Prior art keywords
notch
pin
mandrel
sleeve
inclined planes
Prior art date
Application number
PCT/ES2010/000450
Other languages
Spanish (es)
French (fr)
Inventor
Sebastià BOTA OLIVERAS
Lluís ROST RODRÍGUEZ DE GUZMAN
Jordi Puig Vila
Original Assignee
Comexi Group Industries, S.A.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority to ES201000185A priority Critical patent/ES2394445B1/en
Application filed by Comexi Group Industries, S.A. filed Critical Comexi Group Industries, S.A.
Publication of WO2011101500A1 publication Critical patent/WO2011101500A1/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F27/00—Devices for attaching printing elements or formes to supports
    • B41F27/10—Devices for attaching printing elements or formes to supports for attaching non-deformable curved printing formes to forme cylinders
    • B41F27/105—Devices for attaching printing elements or formes to supports for attaching non-deformable curved printing formes to forme cylinders for attaching cylindrical printing formes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F13/00—Common details of rotary presses or machines
    • B41F13/08—Cylinders
    • B41F13/10—Forme cylinders
    • B41F13/12—Registering devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F27/00—Devices for attaching printing elements or formes to supports
    • B41F27/005—Attaching and registering printing formes to supports
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F27/00—Devices for attaching printing elements or formes to supports
    • B41F27/10—Devices for attaching printing elements or formes to supports for attaching non-deformable curved printing formes to forme cylinders

Definitions

  • the present invention concerns a positioning system for positioning in a predetermined axial and circumferential position a sleeve on a mandrel, applicable to a printing machine roller composed of a mandrel on which different interchangeable sleeves can be installed, where the sleeves can slide axially and circumferentially on the mandrel before reaching said predetermined position.
  • the present invention also concerns a sleeve and even mandrel applicable to a printing machine roller implementing said positioning system.
  • rollers consisting of a mandrel on which a sleeve is installed.
  • the sleeve can slide axially and circumferentially over the mandrel until the sleeve is fixed to the mandrel by auxiliary fixing means installed in the mandrel.
  • auxiliary fixing means installed in the mandrel.
  • a notch located on an inner surface of the sleeve and a pin protruding from an outer surface of said mandrel.
  • the pin penetrates the notch when the sleeve, which has been placed in an approximate circumferential position, is axially slid along the mandrel.
  • the sleeve reaches both the predetermined axial position and the predetermined circumferential position with respect to the mandrel when respective support surfaces of the sleeve and mandrel make mutual contact.
  • the notch has a cylindrical fraction inner support surface that cooperates with a cylindrical outer support surface of the pin to position the sleeve in the predetermined axial and circumferential position relative to the mandrel.
  • Figs. 1A and 1 B schematically shows a positioning system according to the prior art, where a sleeve 1 has a notch 3 on an inner surface thereof and a mandrel 2 has a pin 4 protruding from an outer surface thereof.
  • the notch 3 has a mouth 5 and inner bearing surfaces that define a cylindrical bottom surface 6 and two parallel side surfaces 7a, 7b extending from said mouth 5 to said cylindrical fraction bottom surface 6.
  • the pin 4 has a bearing surface defining a cylindrical surface 8 of equal or slightly smaller diameter than the diameter of the cylindrical fraction bottom surface 6 of the groove 3 to allow the pin 4 to penetrate the groove 3 substantially without interference.
  • the predetermined axial and circumferential position of the sleeve 1 with respect to the mandrel 2 is reached when the center of the cylindrical surface 8 of the pin 4 coincides with the center of the bottom surface of the cylindrical fraction 6 of the notch 3, as shown in Fig. . 1 B.
  • Patents GB-A-349922, EP-A-0510744 and EP-A-1183153 describe different examples of this type of positioning system using a pin with a cylindrical bearing surface and a notch with a cylindrical diameter bottom surface conjugated to make contact with the cylindrical support surface of the pin.
  • a positioning system of this type is also known in which the pin is located in a base body configured to be housed and held in a housing of the mandrel and the notch is located in a base body configured to be housed and fixed in a housing of the cuff.
  • An objective of the present invention is to provide a positioning system for positioning a sleeve on a mandrel, applicable to a machine roller printer, using a notch and a pin configured to provide a unique position of mutual contact when the sleeve and mandrel are in the predetermined axial and circumferential position eliminating any possibility of play between the pin and the notch.
  • Another objective of the present invention is to provide a positioning system for positioning a sleeve on a mandrel, applicable to a printing machine roller, using a notch and a pin configured so that they are not very prone to wear.
  • Still another objective of the present invention is to provide a sleeve and a mandrel applicable to a printing machine roller implementing said positioning system.
  • the present invention provides a positioning system for positioning a sleeve on a mandrel, applicable to a printing machine roller, with the characteristics defined in independent claim 1.
  • Other additional characteristics are defined in the dependent claims. 2 to 12
  • the present invention provides a sleeve, applicable to a printing machine roller, with the characteristics defined in independent claim 13, wherein the sleeve implements a corresponding part of the positioning system of the first aspect.
  • the present invention provides a mandrel, applicable to a printing machine roller, with the characteristics defined in independent claim 14, wherein the mandrel implements a corresponding part of the positioning system of the first aspect.
  • the notch support surfaces comprise two convergent inclined planes, which are inclined in opposite directions that converge from a notch mouth to a bottom of the notch, and the support surfaces of the notch.
  • pin also comprise two convergent inclined planes, which are inclined in opposite directions that converge from one end of the pin opposite the notch toward one end of the pin facing the notch.
  • the mentioned two convergent inclined planes of the notch form an inner dihedral angle, which is conjugated with an outer dihedral angle formed by said two inclined planes convergent of the pin.
  • the internal dihedral angle of the notch and the external dihedral angle of the pin total 360 degrees.
  • Converged inclined planes of the notch and pin provide a unique position of mutual contact and eliminate any possibility of play between the pin and the notch when both are engaged.
  • the aforementioned unique position in which the two convergent inclined planes of the notch and the two converged inclined planes of the pin are in mutual contact coincides with the predetermined axial and circumferential position of the sleeve relative to the mandrel. Since the regions of the respective bearing surfaces of the notch and the pin that come into mutual contact comprise all or much of the extent of the respective convergent inclined planes, the bearing surfaces of the notch and pin are not very prone to wear.
  • notch support surfaces comprise two convergent inclined planes inclined in opposite directions that converge from a notch mouth to said notch bottom forming a dihedral angle
  • the surfaces of dihedral pin support comprise curved surfaces capable of establishing a point or a contact line with each of said two convergent inclined planes of the notch.
  • only the pin bearing surfaces comprise two convergent inclined planes inclined in opposite directions that converge from an opposite end to the notch towards an end facing the notch forming a dihedral angle, while the surfaces Supporting the notch comprise curved surfaces capable of establishing a point or a line of contact with each of said two convergent inclined planes of the pin.
  • second and third embodiments are not as favorable as to avoid wear as the first embodiment, although they still retain the rest of the advantages described in relation to the first embodiment regarding the self-centering effect and the unique position of mutual contact between the notch and pin corresponding to the predetermined axial and circumferential position of the sleeve relative to the mandrel.
  • FIGs. 1A and 1 B are schematic illustrations in plan of a prior art positioning system for positioning a sleeve on a mandrel, applicable to a printing machine roller, showing a notch and a pin in uncoupled and coupled positions, respectively;
  • FIGs. 2A and 2B are schematic plan illustrations of a positioning system for positioning a sleeve on a mandrel, applicable to a printing machine roller, in accordance with a first embodiment of the first aspect of the present invention, showing a notch and a pin in uncoupled and coupled positions, respectively;
  • Fig. 3 is a partial plan view of a sleeve and a mandrel, applicable to a printing machine roller, in accordance with an embodiment of the second and third aspects of the present invention, which include the notch and pin Figs. 2A and 2B respectively, showing the sleeve and mandrel in a position close to the coupling of the notch and the pin;
  • Fig. 4 is a partial perspective view of one end of a sleeve according to another embodiment of the second aspect of the present invention, wherein the notch is located in a notch base body installed in a sleeve housing;
  • Fig. 5 is a perspective view of the notch base body of Fig. 4;
  • Fig. 6 is a partial cross-sectional view of the notch base body installed in the sleeve housing, taken along a central symmetry plane of the notch;
  • Fig. 7 is a partial cross-sectional view of the notch base body installed in the sleeve housing, taken along a plane parallel to the central symmetry plane and containing the axis of a fixing hole;
  • Fig. 8 is a partial perspective view of a portion of a mandrel according to another embodiment of the third aspect of the present invention, where the pin is located in a pin base body installed in a mandrel housing;
  • Fig. 9 is a perspective view of the pin base body of Fig. 8;
  • Fig. 10 is a partial cross-sectional view of the pin base body installed in the mandrel housing, taken along a central symmetry plane of the pin;
  • Fig. 11 is a partial cross-sectional view of a variant of the pin base body retractablely installed in the mandrel housing, taken along a central symmetry plane of the pin;
  • Figs. 12A and 12B are schematic plan illustrations of a positioning system for positioning a sleeve on a mandrel, applicable to a printing machine roller, in accordance with a second embodiment of the first aspect of the present invention, showing a notch and a pin in uncoupled and coupled positions, respectively; Y
  • Figs. 13A and 13B are schematic illustrations in plan of a positioning system for positioning a sleeve on a mandrel, applicable to a printing machine roller, in accordance with a third embodiment of the first aspect of the present invention, showing a notch and a pin in uncoupled and coupled positions, respectively.
  • the positioning system for positioning a sleeve 10 on a mandrel 20, applicable to a printing machine roller, according to a first embodiment of the first aspect of the present invention comprises a notch 11 located on a surface inside 10a of said sleeve 10 (see for example Fig. 4) and a pin 21 protruding from an outer surface 20a of said mandrel 20 (see for example Fig. 8).
  • the mandrel 20 has stumps 20b at its ends (only one of which is shown in Fig. 3) for installation in bearings (not shown) and said outer surface 20a is arranged in an intermediate region.
  • the sleeve 10 has an inner diameter only slightly larger than the outer diameter of the outer surface 20a of the mandrel so that the sleeve can be installed by sliding axially and circumferentially on the mandrel 20.
  • the notch 11 and the pin 21 are located respectively in the sleeve 10 and the mandrel 20 so that when the sleeve 10 is axially slid along the mandrel 20, both having previously been placed in a relative circumferential position in which the notch 11 and the pin 21 are approximately facing each other (Figs. 2A and 3), the pin 21 penetrates the notch 11 until respective supporting surfaces come into contact (Fig. 2B). In this position, the respective bearing surfaces of the groove 11 and the pin 21 cooperate mutually to position the sleeve 10 in a predetermined axial and circumferential position with respect to the mandrel 20
  • the bearing surfaces of the notch 11 comprise two convergent inclined planes 12, 13, which are inclined in opposite directions that converge from a mouth 14 of the notch 11 towards a bottom 15 thereof.
  • the bearing surfaces of the pin 21 comprise two converging inclined planes 22, 23, which are inclined in opposite directions that converge from an opposite end to the notch 24 of the pin 21 towards an end facing the notch 25 of the pin 21 Note that in an operational situation (Figs. 2A, 2B and 3) the two convergent inclined planes 22, 23 of the pin 21 also converge in the direction of said bottom 15 of the notch 11.
  • the mentioned two convergent inclined planes 12, 13 of the notch 11 form an interior dihedral angle conjugated with an outer dihedral angle formed by said two convergent inclined planes 22, 23 of the pin 21. Consequently, when the bearing surfaces of the notch 11 and of the pin 21 come into contact, the regions of mutual contact comprise all or much of the extent of the respective convergent inclined planes 12, 13; 22, 23.
  • the respective convergent inclined planes located on one side of the notch 11 and the pin 21, for example the convergent inclined planes 12, 22, will come into contact before the inclined planes convergent located on the other side, for example convergent inclined planes 13, 23, and may slide on each other to produce a self-centering effect until the respective convergent inclined planes 12, 13; 22, 23 located on both sides of notch 11 and pin 21 make mutual contact.
  • Notch 11 and pin 21 are located respectively in the sleeve
  • the two convergent inclined planes 12, 13 of the notch 11 and the two convergent inclined planes 22, 23 of the pin are symmetrical in relation to respective imaginary planes containing a geometric axis of the sleeve 10 and a geometric axis of the mandrel 20, respectively.
  • the two convergent inclined planes 12, 13 of the notch 11 end at a truncated vertex at the bottom 15 thereof and the two convergent inclined planes 22, 23 of the pin 21 end at a truncated vertex at the end facing the notch 25 of the same.
  • the truncation of said truncated vertex of the pin 21 is greater than the truncation of said truncated vertex of the notch 11 to prevent the truncated vertex of the pin 21 from contacting the truncated vertex of the notch 11 in the engaged position (Fig. 2B) .
  • the trunks may comprise rounded surfaces, the radius of the rounded surface of the truncation of the pin 21 being greater than the radius of the rounded surface of the truncation of the groove 11.
  • the notch 11 and the pin 21 are located directly on the sleeve 10 and the mandrel 20, respectively.
  • the positioning system has means for removing and placing notch 11 and pin 21 in sleeve 10 and mandrel 20, respectively, in an easy and simple way for maintenance, replacement, etc., as illustrated in Figs. 4 to 11.
  • FIG. 4 An end of a sleeve 10 according to another embodiment of the second aspect of the present invention is shown in Fig. 4.
  • the notch 11 is located, while at the opposite end (not shown) there is no notch.
  • the sleeve 10 comprises, at the end shown in Fig. 4, an open housing 19 on the inner surface 10a and on a front surface 10b of the sleeve 10, and the notch 11 is formed in a notch base body 30 configured to be housed and fixed in said housing 19.
  • the notch base body 30 has an inner surface 30a in which the notch 11 is opened and a front surface 30b in which the opening 14 of the notch 11 is opened.
  • the upper surface of the notch base body 30 does not protrude from the inner surface 10a of the sleeve 10 and the front surface 30b of the notch base body 30 is approximately flush with the front surface 10b of the sleeve 10.
  • the notch base body 30 has a pair of through holes 31 operatively aligned with a pair of corresponding threaded holes 33 formed in the housing 19 and parallel to the axis of the sleeve 10.
  • a pair of fixing screws 32 may be inserted through the through holes 31 of the notch base body 30 and screwed into said threaded holes 33 of the sleeve 10, as best shown in Fig. 7.
  • the through holes 31 of the notch base body 30 have a countersink adjacent to the front surface 30b thereof to accommodate heads 32a of the fixing screws 32.
  • FIG. 8 A portion of a mandrel 20 according to another embodiment of the third aspect of the present invention is shown in Fig. 8.
  • a housing 41 is formed that opens on the outer surface 20a on which the sleeve 10 is installed, and the pin 21 is formed in a pin base body 40 configured to be housed and held in said housing 41.
  • the housing 41 of the mandrel 20 is in the form of a cylindrical bore oriented in a radial direction, which has an internal thread thread 43 which extends along at least a portion thereof, and said base body of pin 40 is in the form of a cylindrical rod with an external thread thread 42 configured to be screwed into said internal thread thread 43 of the housing 41 so that only the pin 21 protrudes from the outer surface 20a of the mandrel.
  • the mandrel 10 has a housing 41 and the pin base body 40 is retained within said housing 41 so that it can move between an extended operative position (Fig. 11), wherein the pin 21 protrudes from the outer surface of the mandrel 20, and a non-operative retracted position (not shown), in which the pin 21 does not protrude from the outer surface of the mandrel 20.
  • a non-operative retracted position not shown
  • the housing 41 of the mandrel 20 is in the form of a cylindrical bore oriented in a radial direction with an internal thread thread 43 extending along at least a portion of larger diameter thereof adjacent to the outer surface 20a of the mandrel 20.
  • the pin base body 40 is in the form of a cylindrical rod with a step 44.
  • a ring 50 provided with an external thread thread 51 is configured to be screwed into said thread thread interior 43 of the housing 41 and to interfere with said step 44 of the pin base body 40 and thereby retain it within said housing 41 with freedom to move between said extended operative and non-operative retracted positions.
  • An elastic element such as a helical spring, is disposed between the pin base body 40 and the bottom of the housing 41 to push the pin base body 40 towards said extended operative position.
  • the pin 11 has a coupling element 45 formed, such as a hexagonal hole, configured to be coupled with a tool, such as an Alien-type hexagonal rod wrench, to transmit a torque to the body.
  • a coupling element 45 formed, such as a hexagonal hole, configured to be coupled with a tool, such as an Alien-type hexagonal rod wrench, to transmit a torque to the body.
  • pin base 40 in order to screw it inside the housing 41 or unscrew it outside the housing 41.
  • the two convergent inclined planes 22, 23 of the pin 21 form a dihedral angle of 60 degrees and a third plane 24 located at the end of the pin 21 opposite the vertex 25 of the two convergent inclined planes 22, 23 form respective dihedral angles of 60 degrees with each of the two convergent inclined planes 22, 23.
  • the pin 21 has the shape of a prism whose cross section is an equilateral triangle in which the three dihedral angles of 60 degrees are truncated by means of respective rounded surfaces, so that any of these three dihedral angles is suitable for coupling with the notch 11, taking into account that in agreement the two convergent inclined planes 2, 13 of the notch 1 form a dihedral angle of 60 degrees.
  • the pin 21 Given the ability of the pin base body 40 to freely rotate about its longitudinal axis, the pin 21 will be oriented in any one of the three possible suitable directions when it comes into contact with one of the two convergent inclined planes 12, 13 of the notch 11.
  • the two convergent inclined planes 12, 13 of the notch 11 are in contact with two of the convergent inclined planes 12, 13, 14 of the pin base body 40 preventing rotation of the pin base body 40.
  • Figs. 12A and 12B shows a second embodiment of the positioning system according to the first aspect of the present invention, where the bearing surfaces of the groove 11 comprise two convergent inclined planes 12, 13 inclined in opposite directions converging from a mouth 14 from the notch 11 towards the bottom 15 of the notch 11 forming a dihedral angle, while the bearing surfaces of the pin 21 comprise curved surfaces 26 capable of establishing a point or a line of contact with each of said two convergent inclined planes 12, 13 of the notch 11.
  • the two convergent inclined planes 12, 13 of the notch 11 end at a truncated vertex, for example by means of a rounded surface, at the bottom 15 thereof.
  • the construction of the notch 11 and its installation in the sleeve 10 may be analogous to those described above in relation to Figs. 4 to 7.
  • Figs. 13A and 13B shows a third embodiment of the positioning system according to the first aspect of the present invention, where the bearing surfaces of the pin 21 comprise two convergent inclined planes 22, 23 inclined in opposite directions converging from an opposite end to the notch 24 towards one end facing the notch 25 forming a dihedral angle, and the bearing surfaces of the notch 11 comprise curved surfaces 16, 17 capable of establishing a point or a line of contact with each of said two inclined planes convergent 22, 23 of the pin 21.
  • the two converged inclined planes 22, 23 of the pin 21 end at a truncated vertex, for example by means of a rounded surface, at said end facing the notch 25 thereof, to avoid contact with a bottom 18 of the notch.
  • the construction of the pin 21 and its installation in the mandrel 20 can be analogous to those described above in relation to Figs. 8 to 11.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Insertion Pins And Rivets (AREA)

Abstract

The invention relates to a system which includes a notch (11) made on an inner surface of a bushing (10) and a pin (21) entering said notch, said pin projecting from an outer surface of a mandrel (20) when the bushing (10) is slid axially along the mandrel (20). At least the notch (11) or at least the pin (21) includes two converging inclined planes (12, 13; 22, 23) angled in opposing directions that converge towards the bottom (15) of the notch (11) such as to produce a self-centring effect by engaging with bearing surfaces of the pin (21) or the notch (11) during coupling and in order to engage with the bearing surfaces of the pin (21) or the notch (11) when the bushing (10) reaches a predetermined axial and circumferential position relative to the mandrel (20).

Description

SISTEMA DE POSICIONAMIENTO PARA POSICIONAR UN MANGUITO SOBRE UN MANDRIL, MANGUITO, Y MANDRIL, APLICABLES A UN RODILLO DE MÁQUINA  POSITIONING SYSTEM FOR POSITIONING A HOSE ON A MANDRIL, HOSE, AND MANDRILE, APPLICABLE TO A MACHINE ROLLER
IMPRESORA Campo de la técnica  PRINTER Field of technique
La presente invención concierne a un sistema de posicionamiento para posicionar en una posición axial y circunferencial predeterminada un manguito sobre un mandril, aplicable a un rodillo de máquina impresora compuesto por un mandril sobre el que pueden instalarse diferentes manguitos intercambiables, donde los manguitos pueden deslizar axialmente y circunferencialmente sobre el mandril antes de alcanzar dicha posición predeterminada. La presente invención también concierne a un manguito y aun mandril aplicables a un rodillo de máquina impresora implementando dicho sistema de posicionamiento. Antecedentes de la invención  The present invention concerns a positioning system for positioning in a predetermined axial and circumferential position a sleeve on a mandrel, applicable to a printing machine roller composed of a mandrel on which different interchangeable sleeves can be installed, where the sleeves can slide axially and circumferentially on the mandrel before reaching said predetermined position. The present invention also concerns a sleeve and even mandrel applicable to a printing machine roller implementing said positioning system. Background of the invention
En diferentes tipos de máquina impresora, por ejemplo máquinas impresoras flexográficas u offset, entre otras, se conoce utilizar rodillos compuestos por un mandril sobre el que está instalado un manguito. El manguito pueden deslizar axialmente y circunferencialmente sobre el mandril hasta que el manguito es fijado al mandril por unos medios de fijación auxiliares instalados en el mandril. En muchas aplicaciones es deseable posicionar el manguito en una posición axial y circunferencial predeterminada respecto al mandril antes de activar los mencionados medios de fijación auxiliares para fijar el manguito al mandril.  In different types of printing machine, for example flexographic or offset printing machines, among others, it is known to use rollers consisting of a mandrel on which a sleeve is installed. The sleeve can slide axially and circumferentially over the mandrel until the sleeve is fixed to the mandrel by auxiliary fixing means installed in the mandrel. In many applications it is desirable to position the sleeve in a predetermined axial and circumferential position with respect to the mandrel before activating said auxiliary fixing means to fix the sleeve to the mandrel.
Para posicionar el manguito en dicha posición axial y circunferencial predeterminada respecto al mandril se conoce utilizar una muesca situada en una superficie interior del manguito y un pasador que sobresale de una superficie exterior de dicho mandril. El pasador penetra en la muesca cuando el manguito, el cual ha sido situado en una posición circunferencial aproximada, es deslizado axialmente a lo largo del mandril. El manguito alcanza tanto la posición axial predeterminada como la posición circunferencial predeterminada respecto al mandril cuando unas respectivas superficies de apoyo del manguito y del mandril hacen contacto mutuo. Para ello, la muesca tiene una superficie de apoyo interior fracción cilindrica que coopera con una superficie de apoyo exterior cilindrica del pasador para posicionar el manguito en la posición axial y circunferencial predeterminada respecto al mandril.  To position the sleeve in said predetermined axial and circumferential position with respect to the mandrel it is known to use a notch located on an inner surface of the sleeve and a pin protruding from an outer surface of said mandrel. The pin penetrates the notch when the sleeve, which has been placed in an approximate circumferential position, is axially slid along the mandrel. The sleeve reaches both the predetermined axial position and the predetermined circumferential position with respect to the mandrel when respective support surfaces of the sleeve and mandrel make mutual contact. For this, the notch has a cylindrical fraction inner support surface that cooperates with a cylindrical outer support surface of the pin to position the sleeve in the predetermined axial and circumferential position relative to the mandrel.
En las Figs. 1A y 1 B se muestra esquemáticamente un sistema de posicionamiento de acuerdo con la técnica anterior, donde un manguito 1 tiene una muesca 3 en una superficie interior del mismo y un mandril 2 tiene un pasador 4 que sobresale de una superficie exterior del mismo. La muesca 3 tiene una embocadura 5 y unas superficies de apoyo interiores que definen una superficie de fondo fracción cilindrica 6 y dos superficies laterales paralelas 7a, 7b que se extienden desde dicha embocadura 5 hasta dicha superficie de fondo fracción cilindrica 6. El pasador 4 tiene una superficie de apoyo que define una superficie cilindrica 8 de diámetro igual o ligeramente menor que el diámetro de la superficie de fondo fracción cilindrica 6 de la muesca 3 para permitir que el pasador 4 penetre en la muesca 3 substancialmente sin interferencia. Teóricamente, la posición axial y circunferencial predeterminada del manguito 1 respecto al mandril 2 se alcanza cuando el centro de la superficie cilindrica 8 del pasador 4 coincide con el centro de la superficie de fondo fracción cilindrica 6 de la muesca 3, tal como muestra la Fig. 1 B. In Figs. 1A and 1 B schematically shows a positioning system according to the prior art, where a sleeve 1 has a notch 3 on an inner surface thereof and a mandrel 2 has a pin 4 protruding from an outer surface thereof. The notch 3 has a mouth 5 and inner bearing surfaces that define a cylindrical bottom surface 6 and two parallel side surfaces 7a, 7b extending from said mouth 5 to said cylindrical fraction bottom surface 6. The pin 4 has a bearing surface defining a cylindrical surface 8 of equal or slightly smaller diameter than the diameter of the cylindrical fraction bottom surface 6 of the groove 3 to allow the pin 4 to penetrate the groove 3 substantially without interference. Theoretically, the predetermined axial and circumferential position of the sleeve 1 with respect to the mandrel 2 is reached when the center of the cylindrical surface 8 of the pin 4 coincides with the center of the bottom surface of the cylindrical fraction 6 of the notch 3, as shown in Fig. . 1 B.
La ligera diferencia de diámetros entre el pasador 4 y la muesca 3, así como un cierto desgaste del pasador 4 y/o de la muesca 3 causado por el uso repetido del acoplamiento, produce una holgura A (Fig. 1 B) entre la superficie cilindrica 8 del pasador 4 y las superficies laterales paralelas 7a, 7b y la superficie de fondo fracción cilindrica 6 de la muesca 3. Esta holgura A permite un cierto juego entre el pasador y la muesca, dando como resultado una falta de precisión en la posición axial y circunferencial predeterminada del manguito 1 respecto al mandril 2. La provisión de unos chaflanes 9a, 9b (Fig. 1 B) en la embocadura 5 de la muesca 3 puede facilitar la penetración del pasador en la muesca 11 , pero no soluciona el problema producido por la holgura A.  The slight difference in diameters between pin 4 and notch 3, as well as some wear of pin 4 and / or notch 3 caused by repeated use of the coupling, produces a clearance A (Fig. 1 B) between the surface cylindrical 8 of the pin 4 and the parallel lateral surfaces 7a, 7b and the bottom surface of the cylindrical fraction 6 of the notch 3. This clearance A allows a certain play between the pin and the notch, resulting in a lack of precision in the position predetermined axial and circumferential of the sleeve 1 with respect to the mandrel 2. The provision of chamfers 9a, 9b (Fig. 1 B) in the mouth 5 of the groove 3 can facilitate the penetration of the pin in the groove 11, but does not solve the problem produced by the slack A.
Las patentes GB-A-349922, EP-A-0510744 y EP-A-1183153 describen diferentes ejemplos de este tipo de sistema de posicionamiento utilizando un pasador con una superficie de apoyo cilindrica y una muesca con una superficie de fondo fracción cilindrica de diámetro conjugado para hacer contacto con la superficie de apoyo cilindrica del pasador. También se conoce un sistema de posicionamiento de este tipo en el que el pasador está situado en un cuerpo base configurado para ser alojado y retenido en un alojamiento del mandril y la muesca está situada en un cuerpo base configurado para ser alojado y fijado en un alojamiento del manguito. La citada patente EP-A-0510744 describe un sistema de posicionamiento en el que el pasador está situado en un cuerpo base retenido con capacidad de deslizar en un alojamiento del mandril, de manera que el pasador es retráctil contra la fuerza elástica de un muelle situado entre un fondo del alojamiento y el cuerpo base del pasador.  Patents GB-A-349922, EP-A-0510744 and EP-A-1183153 describe different examples of this type of positioning system using a pin with a cylindrical bearing surface and a notch with a cylindrical diameter bottom surface conjugated to make contact with the cylindrical support surface of the pin. A positioning system of this type is also known in which the pin is located in a base body configured to be housed and held in a housing of the mandrel and the notch is located in a base body configured to be housed and fixed in a housing of the cuff. The aforementioned patent EP-A-0510744 describes a positioning system in which the pin is located in a retained base body capable of sliding in a housing of the mandrel, so that the pin is retractable against the elastic force of a spring located between a bottom of the housing and the base body of the pin.
Un objetivo de la presente invención es aportar un sistema de posicionamiento para posicionar un manguito sobre un mandril, aplicable a un rodillo de máquina impresora, utilizando una muesca y un pasador configurados para proporcionar una posición unívoca de contacto mutuo cuando el manguito y el mandril están en la posición axial y circunferencial predeterminada eliminando cualquier posibilidad de juego entre el pasador y la muesca. An objective of the present invention is to provide a positioning system for positioning a sleeve on a mandrel, applicable to a machine roller printer, using a notch and a pin configured to provide a unique position of mutual contact when the sleeve and mandrel are in the predetermined axial and circumferential position eliminating any possibility of play between the pin and the notch.
Otro objetivo de la presente invención es aportar un sistema de posicionamiento para posicionar un manguito sobre un mandril, aplicable a un rodillo de máquina impresora, utilizando una muesca y un pasador configurados de manera que son poco propensos al desgaste.  Another objective of the present invention is to provide a positioning system for positioning a sleeve on a mandrel, applicable to a printing machine roller, using a notch and a pin configured so that they are not very prone to wear.
Todavía otro objetivo de la presente invención es aportar un manguito y un mandril aplicables a un rodillo de máquina impresora implementando dicho sistema de posicionamiento.  Still another objective of the present invention is to provide a sleeve and a mandrel applicable to a printing machine roller implementing said positioning system.
Exposición de la invención Exhibition of the invention
De acuerdo con un primer aspecto, la presente invención aporta un sistema de posicionamiento para posicionar un manguito sobre un mandril, aplicable a un rodillo de máquina impresora, con las características definidas en la reivindicación independiente 1. Otras características adicionales están definidas en las reivindicaciones dependientes 2 a 12.  According to a first aspect, the present invention provides a positioning system for positioning a sleeve on a mandrel, applicable to a printing machine roller, with the characteristics defined in independent claim 1. Other additional characteristics are defined in the dependent claims. 2 to 12
De acuerdo con un segundo aspecto, la presente invención aporta un manguito, aplicable a un rodillo de máquina impresora, con las características definidas en la reivindicación independiente 13, donde el manguito implementa una parte correspondiente del sistema de posicionamiento del primer aspecto.  According to a second aspect, the present invention provides a sleeve, applicable to a printing machine roller, with the characteristics defined in independent claim 13, wherein the sleeve implements a corresponding part of the positioning system of the first aspect.
De acuerdo con un tercer aspecto, la presente invención aporta un mandril, aplicable a un rodillo de máquina impresora, con las características definidas en la reivindicación independiente 14, donde el mandril implementa una parte correspondiente del sistema de posicionamiento del primer aspecto.  According to a third aspect, the present invention provides a mandrel, applicable to a printing machine roller, with the characteristics defined in independent claim 14, wherein the mandrel implements a corresponding part of the positioning system of the first aspect.
En una primera realización del sistema de posicionamiento, las superficies de apoyo de la muesca comprenden dos planos inclinados convergentes, los cuales están inclinados en direcciones opuestas que convergen desde una embocadura de la muesca hacia un fondo de la muesca, y las superficies de apoyo del pasador comprenden asimismo dos planos inclinados convergentes, los cuales están inclinados en direcciones opuestas que convergen desde un extremo del pasador opuesto a la muesca hacia un extremo del pasador enfrentado a la muesca. Los mencionados dos planos inclinados convergentes de la muesca forman un ángulo diedro interior, el cual es conjugado con un ángulo diedro exterior formado por dichos dos planos inclinados convergentes del pasador. En otras palabras, el ángulo diedro interior de la muesca y el ángulo diedro exterior del pasador suman 360 grados. In a first embodiment of the positioning system, the notch support surfaces comprise two convergent inclined planes, which are inclined in opposite directions that converge from a notch mouth to a bottom of the notch, and the support surfaces of the notch. pin also comprise two convergent inclined planes, which are inclined in opposite directions that converge from one end of the pin opposite the notch toward one end of the pin facing the notch. The mentioned two convergent inclined planes of the notch form an inner dihedral angle, which is conjugated with an outer dihedral angle formed by said two inclined planes convergent of the pin. In other words, the internal dihedral angle of the notch and the external dihedral angle of the pin total 360 degrees.
En consecuencia, si, como es habitual, durante el deslizamiento relativo del manguito y el mandril en la dirección axial la muesca a pesar de estar enfrentada al pasador está descentrada en relación con el pasador, durante el acoplamiento entre la muesca y el pasador unos de los respectivos planos inclinados situados en un lado de la muesca y el pasador entrarán en contacto antes que los otros planos inclinados situados en el otro lado opuesto de la muesca y el pasador. Entonces, los planos inclinados en contacto resbalarán el uno sobre el otro ocasionando un giro relativo del manguito y el mandril en la dirección circunferencial al mismo tiempo que se completa el deslizamiento relativo del manguito y el mandril en la dirección axial hasta que los otros dos planos inclinados entren también en contacto, lo que produce un efecto de autocentrado.  Consequently, if, as usual, during the relative sliding of the sleeve and the mandrel in the axial direction the notch despite being facing the pin is offset in relation to the pin, during the coupling between the notch and the pin some of the respective inclined planes located on one side of the notch and the pin will come into contact before the other inclined planes located on the other opposite side of the notch and the pin. Then, the inclined planes in contact will slide on each other causing a relative rotation of the sleeve and the mandrel in the circumferential direction while completing the relative sliding of the sleeve and the mandrel in the axial direction until the other two planes inclined also come into contact, which produces a self-centering effect.
Los planos inclinados convergentes de la muesca y del pasador proporcionan una posición unívoca de contacto mutuo y eliminan cualquier posibilidad de juego entre el pasador y la muesca cuando ambos están acoplados. La mencionada posición unívoca en la que los dos planos inclinados convergentes de la muesca y los dos planos inclinados convergentes del pasador están en contacto mutuo coincide con la posición axial y circunferencial predeterminada del manguito respecto al mandril. Dado que las regiones de las respectivas superficies de apoyo de la muesca y del pasador que entran en contacto mutuo comprenden toda o gran parte de la extensión de los respectivos planos inclinados convergentes, las superficies de apoyo de la muesca y del pasador son poco propensas al desgaste.  Converged inclined planes of the notch and pin provide a unique position of mutual contact and eliminate any possibility of play between the pin and the notch when both are engaged. The aforementioned unique position in which the two convergent inclined planes of the notch and the two converged inclined planes of the pin are in mutual contact coincides with the predetermined axial and circumferential position of the sleeve relative to the mandrel. Since the regions of the respective bearing surfaces of the notch and the pin that come into mutual contact comprise all or much of the extent of the respective convergent inclined planes, the bearing surfaces of the notch and pin are not very prone to wear.
Además, en el caso poco probable de que se produzca un desgaste apreciable, tal desgaste no afecta a la posición unívoca de contacto mutuo entre las superficies de apoyo de la muesca y del pasador. Si además los dos planos inclinados convergentes de la muesca y del pasador son simétricos en relación con unos planos que contienen un eje geométrico del manguito y del mandril, respectivamente, un posible desgaste de las superficies de apoyo no afectaría a la posición circunferencial predeterminada del manguito respecto al mandril, y sólo produciría una variación en la posición axial relativa que sería fácilmente cuantificable para ser tenida en cuenta.  Furthermore, in the unlikely event of appreciable wear, such wear does not affect the unique position of mutual contact between the bearing surfaces of the notch and the pin. If, in addition, the two convergent inclined planes of the notch and pin are symmetrical in relation to planes containing a geometric axis of the sleeve and the mandrel, respectively, a possible wear of the bearing surfaces would not affect the predetermined circumferential position of the sleeve with respect to the mandrel, and it would only produce a variation in the relative axial position that would be easily quantifiable to be taken into account.
En una segunda realización del sistema de posicionamiento, sólo las superficies de apoyo de la muesca comprenden dos planos inclinados convergentes inclinados en direcciones opuestas que convergen desde una embocadura de la muesca hacia dicho fondo de la muesca formando un ángulo diedro, mientras que las superficies de apoyo del pasador comprenden unas superficies curvadas capaces de establecer un punto o una línea de contacto con cada uno de dichos dos planos inclinados convergentes de la muesca. In a second embodiment of the positioning system, only the notch support surfaces comprise two convergent inclined planes inclined in opposite directions that converge from a notch mouth to said notch bottom forming a dihedral angle, while the surfaces of dihedral pin support comprise curved surfaces capable of establishing a point or a contact line with each of said two convergent inclined planes of the notch.
En una tercera realización del sistema de posicionamiento, sólo las superficies de apoyo del pasador comprenden dos planos inclinados convergentes inclinados en direcciones opuestas que convergen desde un extremo opuesto a la muesca hacia un extremo enfrentado a la muesca formando un ángulo diedro, mientras que las superficies de apoyo de la muesca comprenden unas superficies curvadas capaces de establecer un punto o una línea de contacto con cada uno de dichos dos planos inclinados convergentes del pasador.  In a third embodiment of the positioning system, only the pin bearing surfaces comprise two convergent inclined planes inclined in opposite directions that converge from an opposite end to the notch towards an end facing the notch forming a dihedral angle, while the surfaces Supporting the notch comprise curved surfaces capable of establishing a point or a line of contact with each of said two convergent inclined planes of the pin.
Estas segunda y tercera realizaciones no son tan favorables en cuanto a evitar el desgaste como la primera realización, aunque no obstante conservan el resto de las ventajas descritas en relación con la primera realización referentes al efecto de autocentrado y a la posición unívoca de contacto mutuo entre la muesca y el pasador correspondiente a la posición axial y circunferencial predeterminada del manguito respecto al mandril.  These second and third embodiments are not as favorable as to avoid wear as the first embodiment, although they still retain the rest of the advantages described in relation to the first embodiment regarding the self-centering effect and the unique position of mutual contact between the notch and pin corresponding to the predetermined axial and circumferential position of the sleeve relative to the mandrel.
Breve descripción de los dibujos Brief description of the drawings
Las anteriores y otras características y ventajas se comprenderán más plenamente a partir de la siguiente descripción detallada de unos ejemplos de realización con referencia a los dibujos adjuntos, en los que:  The foregoing and other features and advantages will be more fully understood from the following detailed description of some embodiments with reference to the attached drawings, in which:
las Figs. 1A y 1 B son ilustraciones esquemáticas en planta de un sistema de posicionamiento del estado de la técnica para posicionar un manguito sobre un mandril, aplicable a un rodillo de máquina impresora, mostrando una muesca y un pasador en unas posiciones desacoplada y acoplada, respectivamente;  Figs. 1A and 1 B are schematic illustrations in plan of a prior art positioning system for positioning a sleeve on a mandrel, applicable to a printing machine roller, showing a notch and a pin in uncoupled and coupled positions, respectively;
las Figs. 2A y 2B son ilustraciones esquemáticas en planta de un sistema de posicionamiento para posicionar un manguito sobre un mandril, aplicable a un rodillo de máquina impresora, de acuerdo con una primera realización del primer aspecto de la presente invención, mostrando una muesca y un pasador en unas posiciones desacoplada y acoplada, respectivamente;  Figs. 2A and 2B are schematic plan illustrations of a positioning system for positioning a sleeve on a mandrel, applicable to a printing machine roller, in accordance with a first embodiment of the first aspect of the present invention, showing a notch and a pin in uncoupled and coupled positions, respectively;
la Fig. 3 es una vista parcial en planta de un manguito y un mandril, aplicables a un rodillo de máquina impresora, de acuerdo con una realización de los segundo y tercer aspectos de la presente invención, los cuales incluyen la muesca y el pasador de las Figs. 2A y 2B respectivamente, mostrando el manguito y el mandril en una posición próxima al acoplamiento de la muesca y el pasador;  Fig. 3 is a partial plan view of a sleeve and a mandrel, applicable to a printing machine roller, in accordance with an embodiment of the second and third aspects of the present invention, which include the notch and pin Figs. 2A and 2B respectively, showing the sleeve and mandrel in a position close to the coupling of the notch and the pin;
la Fig. 4 es una vista parcial en perspectiva de un extremo de un manguito de acuerdo con otra realización del segundo aspecto de la presente invención, donde la muesca está situada en un cuerpo base de muesca instalado en un alojamiento del manguito; Fig. 4 is a partial perspective view of one end of a sleeve according to another embodiment of the second aspect of the present invention, wherein the notch is located in a notch base body installed in a sleeve housing;
la Fig. 5 es una vista en perspectiva del cuerpo base de muesca de la Fig. 4; la Fig. 6 es una vista parcial en sección transversal del cuerpo base de muesca instalado en el alojamiento del manguito, tomada por un plano de simetría central de la muesca;  Fig. 5 is a perspective view of the notch base body of Fig. 4; Fig. 6 is a partial cross-sectional view of the notch base body installed in the sleeve housing, taken along a central symmetry plane of the notch;
la Fig. 7 es una vista parcial en sección transversal del cuerpo base de muesca instalado en el alojamiento del manguito, tomada por un plano paralelo al plano de simetría central y que contiene el eje de un agujero de fijación;  Fig. 7 is a partial cross-sectional view of the notch base body installed in the sleeve housing, taken along a plane parallel to the central symmetry plane and containing the axis of a fixing hole;
la Fig. 8 es una vista parcial en perspectiva de una porción de un mandril de acuerdo con otra realización del tercer aspecto de la presente invención, donde el pasador está situada en un cuerpo base de pasador instalado en un alojamiento del mandril;  Fig. 8 is a partial perspective view of a portion of a mandrel according to another embodiment of the third aspect of the present invention, where the pin is located in a pin base body installed in a mandrel housing;
la Fig. 9 es una vista en perspectiva del cuerpo base de pasador de la Fig. 8; la Fig. 10 es una vista parcial en sección transversal del cuerpo base de pasador instalado en el alojamiento del mandril, tomada por un plano de simetría central del pasador;  Fig. 9 is a perspective view of the pin base body of Fig. 8; Fig. 10 is a partial cross-sectional view of the pin base body installed in the mandrel housing, taken along a central symmetry plane of the pin;
la Fig. 11 es una vista parcial en sección transversal de una variante del cuerpo base de pasador instalado de manera retráctil en el alojamiento del mandril, tomada por un plano de simetría central del pasador;  Fig. 11 is a partial cross-sectional view of a variant of the pin base body retractablely installed in the mandrel housing, taken along a central symmetry plane of the pin;
las Figs. 12A y 12B son ilustraciones esquemáticas en planta de un sistema de posicionamiento para posicionar un manguito sobre un mandril, aplicable a un rodillo de máquina impresora, de acuerdo con una segunda realización del primer aspecto de la presente invención, mostrando una muesca y un pasador en unas posiciones desacoplada y acoplada, respectivamente; y  Figs. 12A and 12B are schematic plan illustrations of a positioning system for positioning a sleeve on a mandrel, applicable to a printing machine roller, in accordance with a second embodiment of the first aspect of the present invention, showing a notch and a pin in uncoupled and coupled positions, respectively; Y
las Figs. 13A y 13B son ilustraciones esquemáticas en planta de un sistema de posicionamiento para posicionar un manguito sobre un mandril, aplicable a un rodillo de máquina impresora, de acuerdo con una tercera realización del primer aspecto de la presente invención, mostrando una muesca y un pasador en unas posiciones desacoplada y acoplada, respectivamente.  Figs. 13A and 13B are schematic illustrations in plan of a positioning system for positioning a sleeve on a mandrel, applicable to a printing machine roller, in accordance with a third embodiment of the first aspect of the present invention, showing a notch and a pin in uncoupled and coupled positions, respectively.
Descripción detallada de unos ejemplos de realización Detailed description of some embodiments
Haciendo en primer lugar referencia a las Figs. 2A y 2B, el sistema de posicionamiento para posicionar un manguito 10 sobre un mandril 20, aplicable a un rodillo de máquina impresora, de acuerdo con una primera realización del primer aspecto de la presente invención comprende una muesca 11 situada en una superficie interior 10a de dicho manguito 10 (véase por ejemplo la Fig. 4) y un pasador 21 que sobresale de una superficie exterior 20a de dicho mandril 20 (véase por ejemplo la Fig. 8). En una realización, el mandril 20 tiene unos muñones 20b en sus extremos (sólo uno de los cuales se muestra en la Fig. 3) para instalación en unos cojinetes (no mostrados) y la mencionada superficie exterior 20a está dispuesta en una región intermedia. El manguito 10 tiene un diámetro interior sólo ligeramente superior al diámetro exterior de la superficie exterior 20a del mandril de manera que el manguito puede ser instalado deslizando axialmente y circunferencialmente sobre el mandril 20. Referring firstly to Figs. 2A and 2B, the positioning system for positioning a sleeve 10 on a mandrel 20, applicable to a printing machine roller, according to a first embodiment of the first aspect of the present invention comprises a notch 11 located on a surface inside 10a of said sleeve 10 (see for example Fig. 4) and a pin 21 protruding from an outer surface 20a of said mandrel 20 (see for example Fig. 8). In one embodiment, the mandrel 20 has stumps 20b at its ends (only one of which is shown in Fig. 3) for installation in bearings (not shown) and said outer surface 20a is arranged in an intermediate region. The sleeve 10 has an inner diameter only slightly larger than the outer diameter of the outer surface 20a of the mandrel so that the sleeve can be installed by sliding axially and circumferentially on the mandrel 20.
La muesca 11 y el pasador 21 están situados respectivamente en el manguito 10 y el mandril 20 de manera que cuando el manguito 10 es deslizado axialmente a lo largo del mandril 20, habiendo sido ambos previamente situados en una posición circunferencial relativa en la que la muesca 11 y el pasador 21 están aproximadamente enfrentados (Figs. 2A y 3), el pasador 21 penetra en la muesca 11 hasta que unas respectivas superficies de apoyo entran en contacto (Fig. 2B). En esta posición, las respectivas superficies de apoyo de la muesca 11 y del pasador 21 cooperan mutuamente para posicionar el manguito 10 en una posición axial y circunferencial predeterminada respecto al mandril 20  The notch 11 and the pin 21 are located respectively in the sleeve 10 and the mandrel 20 so that when the sleeve 10 is axially slid along the mandrel 20, both having previously been placed in a relative circumferential position in which the notch 11 and the pin 21 are approximately facing each other (Figs. 2A and 3), the pin 21 penetrates the notch 11 until respective supporting surfaces come into contact (Fig. 2B). In this position, the respective bearing surfaces of the groove 11 and the pin 21 cooperate mutually to position the sleeve 10 in a predetermined axial and circumferential position with respect to the mandrel 20
Las superficies de apoyo de la muesca 11 comprenden dos planos inclinados convergentes 12, 13, los cuales están inclinados en direcciones opuestas que convergen desde una embocadura 14 de la muesca 11 hacia un fondo 15 de la misma. En concordancia, las superficies de apoyo del pasador 21 comprenden dos planos inclinados convergentes 22, 23, los cuales están inclinados en direcciones opuestas que convergen desde un extremo opuesto a la muesca 24 del pasador 21 hacia un extremo enfrentado a la muesca 25 del pasador 21. Obsérvese que en una situación operativa (Figs. 2A, 2B y 3) los dos planos inclinados convergentes 22, 23 del pasador 21 también convergen en dirección a dicho fondo 15 de la muesca 11.  The bearing surfaces of the notch 11 comprise two convergent inclined planes 12, 13, which are inclined in opposite directions that converge from a mouth 14 of the notch 11 towards a bottom 15 thereof. Accordingly, the bearing surfaces of the pin 21 comprise two converging inclined planes 22, 23, which are inclined in opposite directions that converge from an opposite end to the notch 24 of the pin 21 towards an end facing the notch 25 of the pin 21 Note that in an operational situation (Figs. 2A, 2B and 3) the two convergent inclined planes 22, 23 of the pin 21 also converge in the direction of said bottom 15 of the notch 11.
Los mencionados dos planos inclinados convergentes 12, 13 de la muesca 11 forman un ángulo diedro interior conjugado con un ángulo diedro exterior formado por dichos dos planos inclinados convergentes 22, 23 del pasador 21. En consecuencia, cuando las superficies de apoyo de la muesca 11 y del pasador 21 entran en contacto, las regiones de contacto mutuo comprenden toda o gran parte de la extensión de los respectivos planos inclinados convergentes 12, 13; 22, 23.  The mentioned two convergent inclined planes 12, 13 of the notch 11 form an interior dihedral angle conjugated with an outer dihedral angle formed by said two convergent inclined planes 22, 23 of the pin 21. Consequently, when the bearing surfaces of the notch 11 and of the pin 21 come into contact, the regions of mutual contact comprise all or much of the extent of the respective convergent inclined planes 12, 13; 22, 23.
Durante el acoplamiento de la muesca 11 y el pasador 21 , si la muesca está descentrada en relación con el pasador los respectivos planos inclinados convergentes situados en un lado de la muesca 11 y del pasador 21 , por ejemplo los planos inclinados convergentes 12, 22, entrarán en contacto antes que los planos inclinados convergentes situados en el otro lado, por ejemplo los planos inclinados convergentes 13, 23, y podrán resbalar el uno sobre el otro para producir un efecto de autocentrado hasta que los respectivos planos inclinados convergentes 12, 13; 22, 23 situados a ambos lados de la muesca 11 y del pasador 21 hagan contacto mutuo. During the coupling of the notch 11 and the pin 21, if the notch is offset relative to the pin, the respective convergent inclined planes located on one side of the notch 11 and the pin 21, for example the convergent inclined planes 12, 22, will come into contact before the inclined planes convergent located on the other side, for example convergent inclined planes 13, 23, and may slide on each other to produce a self-centering effect until the respective convergent inclined planes 12, 13; 22, 23 located on both sides of notch 11 and pin 21 make mutual contact.
La muesca 11 y el pasador 21 están situados respectivamente en el manguito Notch 11 and pin 21 are located respectively in the sleeve
10 y el mandril 20 en unas posiciones estratégicamente seleccionadas para que la posición en la que los dos planos inclinados convergentes 12, 13 de la muesca hacen tope con los dos planos inclinados convergentes 22, 23 del pasador 21 (Fig. 2B) coincida con la posición axial y circunferencial predeterminada del manguito 10 respecto al mandril 20. 10 and the mandrel 20 in strategically selected positions so that the position in which the two convergent inclined planes 12, 13 of the notch meet the two converged inclined planes 22, 23 of the pin 21 (Fig. 2B) coincides with the predetermined axial and circumferential position of sleeve 10 relative to mandrel 20.
Los dos planos inclinados convergentes 12, 13 de la muesca 11 y los dos planos inclinados convergentes 22, 23 del pasador son simétricos en relación con unos respectivos planos imaginarios que contienen un eje geométrico del manguito 10 y un eje geométrico del mandril 20, respectivamente. Los dos planos inclinados convergentes 12, 13 de la muesca 11 terminan en un vértice truncado en el fondo 15 de la misma y los dos planos inclinados convergentes 22, 23 del pasador 21 terminan en un vértice truncado en el extremo enfrentado a la muesca 25 del mismo. El truncamiento de dicho vértice truncado del pasador 21 es mayor que el truncamiento de dicho vértice truncado de la muesca 11 para evitar que el vértice truncado del pasador 21 haga contacto con el vértice truncado de la muesca 11 en la posición acoplada (Fig. 2B). Por ejemplo, los truncamientos pueden comprender unas superficies redondeadas, siendo el radio de la superficie redondeada del truncamiento del pasador 21 mayor que el radio de la superficie redondeada del truncamiento de la muesca 11.  The two convergent inclined planes 12, 13 of the notch 11 and the two convergent inclined planes 22, 23 of the pin are symmetrical in relation to respective imaginary planes containing a geometric axis of the sleeve 10 and a geometric axis of the mandrel 20, respectively. The two convergent inclined planes 12, 13 of the notch 11 end at a truncated vertex at the bottom 15 thereof and the two convergent inclined planes 22, 23 of the pin 21 end at a truncated vertex at the end facing the notch 25 of the same. The truncation of said truncated vertex of the pin 21 is greater than the truncation of said truncated vertex of the notch 11 to prevent the truncated vertex of the pin 21 from contacting the truncated vertex of the notch 11 in the engaged position (Fig. 2B) . For example, the trunks may comprise rounded surfaces, the radius of the rounded surface of the truncation of the pin 21 being greater than the radius of the rounded surface of the truncation of the groove 11.
En la realización mostrada en la Fig. 3, la muesca 11 y el pasador 21 están situados directamente en el manguito 10 y el mandril 20, respectivamente. No obstante, se prefiere que el sistema de posicionamiento disponga de unos medios que permitan quitar y poner la muesca 11 y el pasador 21 en el manguito 10 y en el mandril 20, respectivamente, de una manera fácil y sencilla para su mantenimiento, sustitución, etc., tal como está ilustrado en las Figs. 4 a 11.  In the embodiment shown in Fig. 3, the notch 11 and the pin 21 are located directly on the sleeve 10 and the mandrel 20, respectively. However, it is preferred that the positioning system has means for removing and placing notch 11 and pin 21 in sleeve 10 and mandrel 20, respectively, in an easy and simple way for maintenance, replacement, etc., as illustrated in Figs. 4 to 11.
En la Fig. 4 se muestra un extremo de un manguito 10 de acuerdo con otra realización del segundo aspecto de la presente invención. En el extremo del manguito 10 mostrado en la Fig. 4 está situada la muesca 11 , mientras que en el extremo opuesto (no mostrado) no hay muesca. El manguito 10 comprende, en el extremo mostrado en la Fig. 4, un alojamiento 19 abierto en la superficie interior 10a y en una superficie frontal 10b del manguito 10, y la muesca 11 está formada en un cuerpo base de muesca 30 configurado para ser alojado y fijado en dicho alojamiento 19. Según muestra la Fig. 5, el cuerpo base de muesca 30 tiene una superficie interior 30a en la que se abre la muesca 11 y una superficie frontal 30b en la que se abre la embocadura 14 de la muesca 11. Cundo el cuerpo base de muesca 30 está instalado en el alojamiento 19 del manguito 10 (Fig. 6), la superficie superior del cuerpo base de muesca 30 no sobresale de la superficie interior 10a del manguito 10 y la superficie frontal 30b del cuerpo base de muesca 30 queda aproximadamente enrasada con la superficie frontal 10b del manguito 10. An end of a sleeve 10 according to another embodiment of the second aspect of the present invention is shown in Fig. 4. At the end of the sleeve 10 shown in Fig. 4, the notch 11 is located, while at the opposite end (not shown) there is no notch. The sleeve 10 comprises, at the end shown in Fig. 4, an open housing 19 on the inner surface 10a and on a front surface 10b of the sleeve 10, and the notch 11 is formed in a notch base body 30 configured to be housed and fixed in said housing 19. As shown in Fig. 5, the notch base body 30 has an inner surface 30a in which the notch 11 is opened and a front surface 30b in which the opening 14 of the notch 11 is opened. When the notch base body 30 is installed in the housing 19 of the sleeve 10 (Fig. 6), the upper surface of the notch base body 30 does not protrude from the inner surface 10a of the sleeve 10 and the front surface 30b of the notch base body 30 is approximately flush with the front surface 10b of the sleeve 10.
Para fijar el cuerpo base de muesca 30 al alojamiento 19 del manguito 10, el cuerpo base de muesca 30 tiene un par de agujeros pasantes 31 alineados en posición operativa con un par de correspondientes agujeros fileteados 33 formados en el alojamiento 19 y paralelos al eje del manguito 10. Un par de tornillos de fijación 32 pueden ser insertados a través de los agujeros pasantes 31 del cuerpo base de muesca 30 y atornillado en dichos agujeros fileteados 33 del manguito 10, tal como se muestra mejor en la Fig. 7. Preferiblemente, los agujeros pasantes 31 del cuerpo base de muesca 30 tienen un avellanado adyacente a la superficie frontal 30b del mismo para alojar unas cabezas 32a de los tornillos de fijación 32.  In order to fix the notch base body 30 to the housing 19 of the sleeve 10, the notch base body 30 has a pair of through holes 31 operatively aligned with a pair of corresponding threaded holes 33 formed in the housing 19 and parallel to the axis of the sleeve 10. A pair of fixing screws 32 may be inserted through the through holes 31 of the notch base body 30 and screwed into said threaded holes 33 of the sleeve 10, as best shown in Fig. 7. Preferably, the through holes 31 of the notch base body 30 have a countersink adjacent to the front surface 30b thereof to accommodate heads 32a of the fixing screws 32.
En la Fig. 8 se muestra una porción de un mandril 20 de acuerdo con otra realización del tercer aspecto de la presente invención. En el mandril 20 está formado un alojamiento 41 que se abre en la superficie exterior 20a sobre la que se instala el manguito 10, y el pasador 21 está formado en un cuerpo base de pasador 40 configurado para ser alojado y retenido en dicho alojamiento 41.  A portion of a mandrel 20 according to another embodiment of the third aspect of the present invention is shown in Fig. 8. In the mandrel 20 a housing 41 is formed that opens on the outer surface 20a on which the sleeve 10 is installed, and the pin 21 is formed in a pin base body 40 configured to be housed and held in said housing 41.
De acuerdo con una primera variante mostrada en las Figs. 9 y 10, el alojamiento 41 del mandril 20 tiene la forma de un agujero cilindrico orientado en una dirección radial, el cual tiene un fileteado de rosca interior 43 que se extiende a lo largo de al menos una porción del mismo, y dicho cuerpo base de pasador 40 tiene la forma de un vástago cilindrico con un fileteado de rosca exterior 42 configurado para atornillarse en dicho fileteado de rosca interior 43 del alojamiento 41 de manera que sólo el pasador 21 sobresale de la superficie exterior 20a del mandril.  According to a first variant shown in Figs. 9 and 10, the housing 41 of the mandrel 20 is in the form of a cylindrical bore oriented in a radial direction, which has an internal thread thread 43 which extends along at least a portion thereof, and said base body of pin 40 is in the form of a cylindrical rod with an external thread thread 42 configured to be screwed into said internal thread thread 43 of the housing 41 so that only the pin 21 protrudes from the outer surface 20a of the mandrel.
De acuerdo con una segunda variante mostrada en la Fig. 11 , el mandril 10 tiene un alojamiento 41 y el cuerpo base de pasador 40 está retenido dentro de dicho alojamiento 41 de manera que puede moverse entre una posición extendida operativa (Fig. 11), en la que el pasador 21 sobresale de la superficie exterior del mandril 20, y una posición retraída no operativa (no mostrada), en la que el pasador 21 no sobresale de la superficie exterior del mandril 20. Así, cuando el cuerpo base de pasador 40 está en dicha posición retraída no operativa la superficie exterior 20a del mandril 20 está despejada y el pasador 21 no interfiere con el manguito 11. En la segunda variante de la Fig. 1 1 , el alojamiento 41 del mandril 20 tiene la forma de un agujero cilindrico orientado en una dirección radial con un fileteado de rosca interior 43 que se extiende a lo largo de al menos una porción de mayor diámetro del mismo adyacente a la superficie exterior 20a del mandril 20. El cuerpo base de pasador 40 tiene la forma de un vástago cilindrico con un escalón 44. Un anillo 50 provisto de un fileteado de rosca exterior 51 está configurado para atornillarse en dicho fileteado de rosca interior 43 del alojamiento 41 y para interferir con dicho escalón 44 del cuerpo base de pasador 40 y con ello retener a éste dentro de dicho alojamiento 41 con libertad de moverse entre dichas posiciones extendida operativa y retraída no operativa. Un elemento elástico, tal como un muelle helicoidal, está dispuesto entre el cuerpo base de pasador 40 y el fondo del alojamiento 41 para empujar el cuerpo base de pasador 40 hacia dicha posición extendida operativa. According to a second variant shown in Fig. 11, the mandrel 10 has a housing 41 and the pin base body 40 is retained within said housing 41 so that it can move between an extended operative position (Fig. 11), wherein the pin 21 protrudes from the outer surface of the mandrel 20, and a non-operative retracted position (not shown), in which the pin 21 does not protrude from the outer surface of the mandrel 20. Thus, when the pin base body 40 is in said non-operative retracted position the outer surface 20a of the mandrel 20 is clear and the pin 21 does not interfere with the sleeve 11. In the second variant of Fig. 1 1, the housing 41 of the mandrel 20 is in the form of a cylindrical bore oriented in a radial direction with an internal thread thread 43 extending along at least a portion of larger diameter thereof adjacent to the outer surface 20a of the mandrel 20. The pin base body 40 is in the form of a cylindrical rod with a step 44. A ring 50 provided with an external thread thread 51 is configured to be screwed into said thread thread interior 43 of the housing 41 and to interfere with said step 44 of the pin base body 40 and thereby retain it within said housing 41 with freedom to move between said extended operative and non-operative retracted positions. An elastic element, such as a helical spring, is disposed between the pin base body 40 and the bottom of the housing 41 to push the pin base body 40 towards said extended operative position.
En ambas primera y segunda variantes, el pasador 11 tiene formado un elemento de acoplamiento 45, tal como un agujero hexagonal, configurado para ser acoplado con una herramienta, tal como una llave de varilla hexagonal tipo Alien, para transmitir un par de giro al cuerpo base de pasador 40 con el fin de atornillarlo al interior del alojamiento 41 o desatornillarlo fuera del alojamiento 41.  In both first and second variants, the pin 11 has a coupling element 45 formed, such as a hexagonal hole, configured to be coupled with a tool, such as an Alien-type hexagonal rod wrench, to transmit a torque to the body. pin base 40 in order to screw it inside the housing 41 or unscrew it outside the housing 41.
Se observará que en la primera variante mostrada en las Figs. 9 y 10 no hay unos medios para determinar la orientación de los dos planos inclinados convergentes 22, 23 del pasador 21 cuando el cuerpo base de pasador 40 está completamente atornillado en el alojamiento 41. Si se deja el cuerpo base de pasador 40 sin atornillar completamente en el alojamiento 41 , el cuerpo base de pasador 40 podrá girar libremente alrededor de su eje longitudinal. En la segunda variante mostrada en la Fig. 11 tampoco hay unos medios para determinar la orientación de los planos inclinados convergentes 22, 23 del pasador 21 puesto que el cuerpo base de pasador 40 puede girar libremente alrededor de su eje longitudinal.  It will be noted that in the first variant shown in Figs. 9 and 10 there is no means for determining the orientation of the two convergent inclined planes 22, 23 of the pin 21 when the pin base body 40 is completely screwed into the housing 41. If the pin base body 40 is left without fully screwing in the housing 41, the pin base body 40 may rotate freely around its longitudinal axis. In the second variant shown in Fig. 11 there is also no means for determining the orientation of the convergent inclined planes 22, 23 of the pin 21 since the pin base body 40 can freely rotate about its longitudinal axis.
En ambas primera y segunda variantes, los dos planos inclinados convergentes 22, 23 del pasador 21 forman un ángulo diedro de 60 grados y un tercer plano 24 situado en el extremo del pasador 21 opuesto al vértice 25 de los dos planos inclinados convergentes 22, 23 forma respectivos ángulos diedros de 60 grados con cada uno de los dos planos inclinados convergentes 22, 23. Así, el pasador 21 tiene la forma de un prisma cuya sección transversal es un triángulo equilátero en el que los tres ángulos diedros de 60 grados están truncados medíante respectivas superficies redondeadas, de manera que cualquiera de estos los tres ángulos diedros es apto para acoplarse con la muesca 11 , teniendo en cuenta que en concordancia los dos planos inclinados convergentes 2, 13 de la muesca 1 forman un ángulo diedro de 60 grados. Dada la capacidad del cuerpo base de pasador 40 para girar libremente alrededor de su eje longitudinal, el pasador 21 se orientará en una cualquiera de las tres posibles direcciones adecuadas cuando entre en contacto con uno de los dos planos inclinados convergentes 12, 13 de la muesca 11. Cuando la muesca 11 y el pasador 21 están acoplados, los dos planos inclinados convergentes 12, 13 de la muesca 11 están en contacto con dos de los planos inclinados convergentes 12, 13, 14 del cuerpo base de pasador 40 impidiendo el giro del cuerpo base de pasador 40. In both first and second variants, the two convergent inclined planes 22, 23 of the pin 21 form a dihedral angle of 60 degrees and a third plane 24 located at the end of the pin 21 opposite the vertex 25 of the two convergent inclined planes 22, 23 form respective dihedral angles of 60 degrees with each of the two convergent inclined planes 22, 23. Thus, the pin 21 has the shape of a prism whose cross section is an equilateral triangle in which the three dihedral angles of 60 degrees are truncated by means of respective rounded surfaces, so that any of these three dihedral angles is suitable for coupling with the notch 11, taking into account that in agreement the two convergent inclined planes 2, 13 of the notch 1 form a dihedral angle of 60 degrees. Given the ability of the pin base body 40 to freely rotate about its longitudinal axis, the pin 21 will be oriented in any one of the three possible suitable directions when it comes into contact with one of the two convergent inclined planes 12, 13 of the notch 11. When the notch 11 and the pin 21 are coupled, the two convergent inclined planes 12, 13 of the notch 11 are in contact with two of the convergent inclined planes 12, 13, 14 of the pin base body 40 preventing rotation of the pin base body 40.
En las Figs. 12A y 12B se muestra una segunda realización del sistema de posicionamiento de acuerdo con el primer aspecto de la presente invención, donde las superficies de apoyo de la muesca 11 comprenden dos planos inclinados convergentes 12, 13 inclinados en direcciones opuestas que convergen desde una embocadura 14 de la muesca 11 hacia el fondo 15 de la muesca 11 formando un ángulo diedro, mientras que las superficies de apoyo del pasador 21 comprenden unas superficies curvadas 26 capaces de establecer un punto o una línea de contacto con cada uno de dichos dos planos inclinados convergentes 12, 13 de la muesca 11. Los dos planos inclinados convergentes 12, 13 de la muesca 11 terminan en un vértice truncado, por ejemplo mediante una superficie redondeada, en el fondo 15 de la misma. En este caso, la construcción de la muesca 11 y su instalación en el manguito 10 pueden ser análogas a las descritas anteriormente en relación con las Figs. 4 a 7.  In Figs. 12A and 12B shows a second embodiment of the positioning system according to the first aspect of the present invention, where the bearing surfaces of the groove 11 comprise two convergent inclined planes 12, 13 inclined in opposite directions converging from a mouth 14 from the notch 11 towards the bottom 15 of the notch 11 forming a dihedral angle, while the bearing surfaces of the pin 21 comprise curved surfaces 26 capable of establishing a point or a line of contact with each of said two convergent inclined planes 12, 13 of the notch 11. The two convergent inclined planes 12, 13 of the notch 11 end at a truncated vertex, for example by means of a rounded surface, at the bottom 15 thereof. In this case, the construction of the notch 11 and its installation in the sleeve 10 may be analogous to those described above in relation to Figs. 4 to 7.
En las Figs. 13A y 13B se muestra una tercera realización del sistema de posicionamiento de acuerdo con el primer aspecto de la presente invención, donde las superficies de apoyo del pasador 21 comprenden dos planos inclinados convergentes 22, 23 inclinados en direcciones opuestas que convergen desde un extremo opuesto a la muesca 24 hacia un extremo enfrentado a la muesca 25 formando un ángulo diedro, y las superficies de apoyo de la muesca 11 comprenden unas superficies curvadas 16, 17 capaces de establecer un punto o una línea de contacto con cada uno de dichos dos planos inclinados convergentes 22, 23 del pasador 21. Los dos planos inclinados convergentes 22, 23 del pasador 21 terminan en un vértice truncado, por ejemplo mediante una superficie redondeada, en dicho extremo enfrentado a la muesca 25 del mismo, para evitar el contacto con un fondo 18 de la muesca. En este caso, la construcción del pasador 21 y su instalación en el mandril 20 pueden ser análogas a las descritas anteriormente en relación con las Figs. 8 a 11.  In Figs. 13A and 13B shows a third embodiment of the positioning system according to the first aspect of the present invention, where the bearing surfaces of the pin 21 comprise two convergent inclined planes 22, 23 inclined in opposite directions converging from an opposite end to the notch 24 towards one end facing the notch 25 forming a dihedral angle, and the bearing surfaces of the notch 11 comprise curved surfaces 16, 17 capable of establishing a point or a line of contact with each of said two inclined planes convergent 22, 23 of the pin 21. The two converged inclined planes 22, 23 of the pin 21 end at a truncated vertex, for example by means of a rounded surface, at said end facing the notch 25 thereof, to avoid contact with a bottom 18 of the notch. In this case, the construction of the pin 21 and its installation in the mandrel 20 can be analogous to those described above in relation to Figs. 8 to 11.
A un experto en la técnica se le ocurrirán modificaciones y variaciones a partir de los ejemplos de realización mostrados y descritos sin salirse del alcance de la presente invención según está definido en las reivindicaciones adjuntas.  Modifications and variations will occur to one skilled in the art from the embodiments shown and described without departing from the scope of the present invention as defined in the appended claims.

Claims

REIVINDICACIONES
1. - Sistema de posicionamiento para posicionar un manguito (10) sobre un mandril (20), aplicable a un rodillo de máquina impresora, del tipo que comprende una muesca (1 ) situada en una superficie interior de dicho manguito (10) y en la que penetra un pasador (21) que sobresale de una superficie exterior de dicho mandril (20) cuando el manguito (10) es deslizado axialmente a lo largo del mandril (20), donde dicha muesca (1 1) y dicho pasador (21) tienen respectivas superficies de apoyo que cooperan mutuamente para posicionar el manguito (10) en una posición axial y circunferencial predeterminada respecto al mandril (20), caracterizado porque al menos dichas superficies de apoyo de la muesca (11) o al menos dichas superficies de apoyo del pasador (21) comprenden dos planos inclinados convergentes (12, 13; 22, 23) inclinados en direcciones opuestas que convergen hacia un fondo (15) de la muesca (11), en situación operativa, contra los que pueden resbalar las superficies de apoyo del pasador (21) o de la muesca (11) para producir un efecto de autocentrado durante el acoplamiento y contra las que hacen tope las superficies de apoyo del pasador (21) o de la muesca (11) cuando el manguito (10) y el mandril (20) están en dicha posición axial y circunferencial predeterminada. 1. - Positioning system for positioning a sleeve (10) on a mandrel (20), applicable to a printing machine roller, of the type comprising a notch (1) located on an inner surface of said sleeve (10) and in which penetrates a pin (21) that protrudes from an outer surface of said mandrel (20) when the sleeve (10) is axially slid along the mandrel (20), where said notch (1 1) and said pin (21 ) have respective support surfaces that cooperate mutually to position the sleeve (10) in a predetermined axial and circumferential position with respect to the mandrel (20), characterized in that at least said notch support surfaces (11) or at least said surfaces of pin support (21) comprises two convergent inclined planes (12, 13; 22, 23) inclined in opposite directions that converge towards a bottom (15) of the notch (11), in operative situation, against which the surfaces can slide of support of pin (21) or notch (11) to produce a self-centering effect during engagement and against which the bearing surfaces of the pin (21) or the notch (11) abut when the sleeve (10) and the mandrel (20) are in said predetermined axial and circumferential position.
2. - Sistema según la reivindicación 1 , caracterizado porque las superficies de apoyo de la muesca (11) comprenden dos planos inclinados convergentes (12, 13) inclinados en direcciones opuestas que convergen desde una embocadura (14) de la muesca ( ) hacia dicho fondo (15) de la muesca (1 ), y las superficies de apoyo del pasador (21) comprenden dos planos inclinados convergentes (22, 23) inclinados en direcciones opuestas que convergen desde un extremo opuesto a la muesca (24) hacia un extremo enfrentado a la muesca (25), donde dichos dos planos inclinados convergentes (12, 13) de la muesca (1 1) forman un ángulo diedro interior conjugado con un ángulo diedro exterior formado por dichos dos planos inclinados convergentes (22, 23) del pasador (21).  2. - System according to claim 1, characterized in that the notch support surfaces (11) comprise two convergent inclined planes (12, 13) inclined in opposite directions converging from a notch (14) of the notch () towards said bottom (15) of the notch (1), and the pin bearing surfaces (21) comprise two convergent inclined planes (22, 23) inclined in opposite directions converging from an opposite end to the notch (24) towards one end facing the notch (25), where said two convergent inclined planes (12, 13) of the notch (1 1) form an inner dihedral angle conjugated with an outer dihedral angle formed by said two convergent inclined planes (22, 23) of the pin (21).
3. - Sistema según la reivindicación 1 , caracterizado porque las superficies de apoyo de la muesca (11) comprenden dos planos inclinados convergentes (12, 13) inclinados en direcciones opuestas que convergen desde una embocadura (14) de la muesca (11) hacia dicho fondo (15) de la muesca (11) formando un ángulo diedro, y las superficies de apoyo del pasador (21) comprenden unas superficies curvadas (26) capaces de establecer un punto o una línea de contacto con cada uno de dichos dos planos inclinados convergentes (12, 13) de la muesca (11). 3. - System according to claim 1, characterized in that the notch support surfaces (11) comprise two convergent inclined planes (12, 13) inclined in opposite directions converging from a notch (14) of the notch (11) towards said bottom (15) of the notch (11) forming a dihedral angle, and the bearing surfaces of the pin (21) comprise curved surfaces (26) capable of establishing a point or a line of contact with each of said two planes convergent slopes (12, 13) of the notch (11).
4. - Sistema según la reivindicación 1 , caracterizado porque las superficies de apoyo del pasador (21) comprenden dos planos inclinados convergentes (22, 23) inclinados en direcciones opuestas que convergen desde un extremo opuesto a la muesca (24) hacia un extremo enfrentado a la muesca (25) formando un ángulo diedro, y las superficies de apoyo de la muesca (11) comprenden unas superficies curvadas (16, 17) capaces de establecer un punto o una línea de contacto con cada uno de dichos dos planos inclinados convergentes (22, 23) del pasador (21). 4. - System according to claim 1, characterized in that the support surfaces of the pin (21) comprise two converged inclined planes (22, 23) inclined in opposite directions converging from an opposite end to the notch (24) towards an opposite end to the notch (25) forming a dihedral angle, and the support surfaces of the notch (11) comprise curved surfaces (16, 17) capable of establishing a point or a line of contact with each of said two convergent inclined planes (22, 23) of the pin (21).
5. - Sistema según la reivindicación 1 , 2 ó 3, caracterizado porque los dos planos inclinados convergentes (12, 13) de la muesca (11) y/o los dos planos inclinados convergentes (22, 23) del pasador son simétricos en relación con un plano que contiene un eje geométrico del manguito (10) y/o un eje geométrico del mandril (20).  5. - System according to claim 1, 2 or 3, characterized in that the two convergent inclined planes (12, 13) of the notch (11) and / or the two convergent inclined planes (22, 23) of the pin are symmetrical in relation with a plane containing a geometric axis of the sleeve (10) and / or a geometric axis of the mandrel (20).
6. - Sistema según la reivindicación 2, caracterizado porque los dos planos inclinados convergentes (12, 13) de la muesca (11) terminan en un vértice truncado en el fondo (15) de la misma y los dos planos inclinados convergentes (22, 23) del pasador (21) terminan en un vértice truncado en dicho extremo enfrentado a la muesca (25) del mismo, siendo el truncamiento de dicho vértice truncado del pasador (21) mayor que el truncamiento de dicho vértice truncado de la muesca (11).  6. - System according to claim 2, characterized in that the two convergent inclined planes (12, 13) of the notch (11) end in a truncated vertex at the bottom (15) thereof and the two convergent inclined planes (22, 23) of the pin (21) ends at a truncated vertex at said end facing the notch (25) thereof, the truncation of said truncated vertex of the pin (21) being greater than the truncation of said truncated vertex of the notch (11 ).
7. - Sistema según la reivindicación 2, 3 ó 5, caracterizado porque los dos planos inclinados convergentes (12, 3) de la muesca (11) terminan en un vértice truncado en el fondo (15) de la misma.  7. - System according to claim 2, 3 or 5, characterized in that the two convergent inclined planes (12, 3) of the notch (11) end in a truncated vertex at the bottom (15) thereof.
8. - Sistema según la reivindicación 2, 4 ó 5, caracterizado porque los dos planos inclinados convergentes (22, 23) del pasador (21) terminan en un vértice truncado en dicho extremo enfrentado a la muesca (25) del mismo.  8. - System according to claim 2, 4 or 5, characterized in that the two convergent inclined planes (22, 23) of the pin (21) end in a truncated vertex at said end facing the notch (25) thereof.
9. - Sistema según una cualquiera de las reivindicaciones 1 a 8, caracterizado porque la muesca (11) está formada en un cuerpo base de muesca (30) configurado para ser alojado y fijado en un alojamiento (19) abierto en una superficie interior y en una superficie frontal del manguito (10).  9. - System according to any one of claims 1 to 8, characterized in that the notch (11) is formed in a notch base body (30) configured to be housed and fixed in an open housing (19) on an inner surface and on a front surface of the sleeve (10).
10. - Sistema según una cualquiera de las reivindicaciones 1 a 8, caracterizado porque el pasador (21) está formado en un cuerpo base de pasador (40) configurado para ser alojado y retenido en un alojamiento (41) formado en una superficie exterior del mandril (20).  10. - System according to any one of claims 1 to 8, characterized in that the pin (21) is formed in a pin base body (40) configured to be housed and retained in a housing (41) formed in an outer surface of the mandrel (20).
11. - Sistema según la reivindicación 10, caracterizado porque dicho cuerpo base de pasador (40) está retenido dentro de dicho alojamiento (41) con capacidad de movimiento entre una posición extendida operativa, en la que el pasador (21) sobresale de la superficie exterior del mandril (20), y una posición retraída no operativa, en la que el pasador (21) no sobresale de la superficie exterior del mandril (20), y un elemento elástico está dispuesto entre el cuerpo base de pasador (40) y el alojamiento (41) para empujar el cuerpo base de pasador (40) hacia dicha posición extendida operativa. 11. - System according to claim 10, characterized in that said pin base body (40) is retained within said housing (41) with movement capacity between an extended operative position, in which the pin (21) protrudes from the surface outside of the mandrel (20), and a non-operative retracted position, in which the pin (21) does not protrude from the outer surface of the mandrel (20), and an element Elastic is disposed between the pin base body (40) and the housing (41) to push the pin base body (40) into said extended operative position.
12. - Sistema según la reivindicación 10 u 11 , caracterizado porque dicho cuerpo base de pasador (40) está retenido dentro de dicho alojamiento (41) de manera que puede girar libremente alrededor de un eje longitudinal del mismo, y el pasador (21) tiene la forma de un prisma cuya sección transversal es un triángulo equilátero definiendo tres ángulos diedros con vértices truncados.  12. - System according to claim 10 or 11, characterized in that said pin base body (40) is retained within said housing (41) so that it can freely rotate about a longitudinal axis thereof, and the pin (21) It has the shape of a prism whose cross section is an equilateral triangle defining three dihedral angles with truncated vertices.
13. - Manguito (10), aplicable a un rodillo de máquina impresora, del tipo que comprende una muesca (11) situada en una superficie interior del mismo, estando dicha muesca (11) configurada para recibir un pasador (21) que sobresale de una superficie exterior de un mandril (20) cuando el manguito (10) es deslizado axialmente a lo largo de dicho mandril (20), teniendo dicha muesca (11) unas superficies de apoyo configuradas para cooperar con unas superficies de apoyo de dicho pasador (21) para posicionar el manguito (10) en una posición axial y circunferencial predeterminada respecto al mandril (20), caracterizado porque dichas superficies de apoyo de la muesca (11) comprenden dos planos inclinados convergentes (12, 13) inclinados en direcciones opuestas que convergen desde una embocadura (14) de la muesca (11) hacia un fondo (15) de la muesca (11) formando un ángulo diedro.  13. - Sleeve (10), applicable to a printing machine roller, of the type comprising a notch (11) located on an inner surface thereof, said notch (11) being configured to receive a pin (21) protruding from an outer surface of a mandrel (20) when the sleeve (10) is axially slid along said mandrel (20), said notch (11) having supporting surfaces configured to cooperate with supporting surfaces of said pin ( 21) to position the sleeve (10) in a predetermined axial and circumferential position with respect to the mandrel (20), characterized in that said notch bearing surfaces (11) comprise two convergent inclined planes (12, 13) inclined in opposite directions that they converge from a mouth (14) of the notch (11) towards a bottom (15) of the notch (11) forming a dihedral angle.
14. - Mandril (20), aplicable a un rodillo de máquina impresora, del tipo que comprende un pasador (21) que sobresale de una superficie exterior del mismo, estando dicho pasador (21) configurado para penetrar en una muesca (11) situada en una superficie interior de un manguito (10) cuando dicho manguito (10) es deslizado axialmente a lo largo de dicho mandril (20), teniendo dicho pasador (21) unas superficies de apoyo configuradas para cooperar con unas superficies de apoyo de la muesca (11) para posicionar el manguito (10) en una posición axial y circunferencial predeterminada respecto al mandril (20), caracterizado porque dichas superficies de apoyo del pasador (21) comprenden dos planos inclinados convergentes (22, 23) inclinados en direcciones opuestas que convergen desde un extremo opuesto a la muesca (24) hacia un extremo enfrentado a la muesca (25) formando un ángulo diedro.  14. - Chuck (20), applicable to a printing machine roller, of the type comprising a pin (21) protruding from an outer surface thereof, said pin (21) being configured to penetrate a notch (11) located on an inner surface of a sleeve (10) when said sleeve (10) is axially slid along said mandrel (20), said pin (21) having bearing surfaces configured to cooperate with a bearing surfaces of the notch (11) for positioning the sleeve (10) in a predetermined axial and circumferential position with respect to the mandrel (20), characterized in that said pin bearing surfaces (21) comprise two convergent inclined planes (22, 23) inclined in opposite directions that they converge from an end opposite the notch (24) towards an end facing the notch (25) forming a dihedral angle.
PCT/ES2010/000450 2010-02-17 2010-11-08 Positioning system for positioning a bushing on a mandrel, bushing and mandrel suitable for use on a roller of a printing machine WO2011101500A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
ES201000185A ES2394445B1 (en) 2010-02-17 2010-02-17 POSITIONING SYSTEM FOR POSITIONING A HOSE ON A MANDRIL, HOSE, AND MANDRIL, APPLICABLE TO A ROLLER OF PRINTER MACHINE.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ESP201000185 2010-02-17
ES201000185A ES2394445B1 (en) 2010-02-17 2010-02-17 POSITIONING SYSTEM FOR POSITIONING A HOSE ON A MANDRIL, HOSE, AND MANDRIL, APPLICABLE TO A ROLLER OF PRINTER MACHINE.

Publications (1)

Publication Number Publication Date
WO2011101500A1 true WO2011101500A1 (en) 2011-08-25

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11420434B2 (en) 2018-10-17 2022-08-23 Flint Group Germany Gmbh Cylinder with movable pin, and mounting and dismounting method

Citations (9)

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US3882775A (en) * 1973-07-02 1975-05-13 World Color Press Registration system for thin magnetic printing plates
US4491082A (en) * 1982-04-01 1985-01-01 Ppg Industries, Inc. Cylindrical sleeve applicator for use in manufacturing chemically treated filaments
EP0520598A1 (en) * 1991-06-27 1992-12-30 Komori Corporation Plate for printing press or the like
EP0711664A1 (en) * 1994-11-11 1996-05-15 MAN Roland Druckmaschinen AG Device for fitting printing plates
US5740738A (en) * 1996-08-14 1998-04-21 Goss Graphic Systems, Inc. Gapless blanket cylinder
US5904095A (en) * 1997-03-19 1999-05-18 Meca Of Green Bay, Inc. Bridge mandrel for flexographic printing presses
US6276271B1 (en) * 2000-03-17 2001-08-21 Day International, Inc. Bridge mandrel for flexographic printing systems
WO2009053655A1 (en) * 2007-10-19 2009-04-30 Philippe Francille Method of mounting a thin-walled sleeve on a printing press form cylinder, and suitable transfer sleeve
EP2191969A1 (en) * 2008-11-26 2010-06-02 Agfa Graphics N.V. Sleeves and sleeve segments for flexography

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3882775A (en) * 1973-07-02 1975-05-13 World Color Press Registration system for thin magnetic printing plates
US4491082A (en) * 1982-04-01 1985-01-01 Ppg Industries, Inc. Cylindrical sleeve applicator for use in manufacturing chemically treated filaments
EP0520598A1 (en) * 1991-06-27 1992-12-30 Komori Corporation Plate for printing press or the like
EP0711664A1 (en) * 1994-11-11 1996-05-15 MAN Roland Druckmaschinen AG Device for fitting printing plates
US5740738A (en) * 1996-08-14 1998-04-21 Goss Graphic Systems, Inc. Gapless blanket cylinder
US5904095A (en) * 1997-03-19 1999-05-18 Meca Of Green Bay, Inc. Bridge mandrel for flexographic printing presses
US6276271B1 (en) * 2000-03-17 2001-08-21 Day International, Inc. Bridge mandrel for flexographic printing systems
WO2009053655A1 (en) * 2007-10-19 2009-04-30 Philippe Francille Method of mounting a thin-walled sleeve on a printing press form cylinder, and suitable transfer sleeve
EP2191969A1 (en) * 2008-11-26 2010-06-02 Agfa Graphics N.V. Sleeves and sleeve segments for flexography

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11420434B2 (en) 2018-10-17 2022-08-23 Flint Group Germany Gmbh Cylinder with movable pin, and mounting and dismounting method
EP3867068B1 (en) * 2018-10-17 2022-11-30 Flint Group Germany GmbH Cylinder with movable pin as well as mounting and dismounting method

Also Published As

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ES2394445A1 (en) 2013-01-31

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