EP0093092A2 - Dispositif de protection pour le cylindre porte-lames dans les machines à écharner ou analogue d'une tannerie, comprenant une plaque protectrice mobile en synchronisme avec l'ouverture de la machine - Google Patents

Dispositif de protection pour le cylindre porte-lames dans les machines à écharner ou analogue d'une tannerie, comprenant une plaque protectrice mobile en synchronisme avec l'ouverture de la machine Download PDF

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Publication number
EP0093092A2
EP0093092A2 EP83830082A EP83830082A EP0093092A2 EP 0093092 A2 EP0093092 A2 EP 0093092A2 EP 83830082 A EP83830082 A EP 83830082A EP 83830082 A EP83830082 A EP 83830082A EP 0093092 A2 EP0093092 A2 EP 0093092A2
Authority
EP
European Patent Office
Prior art keywords
blades
cylinder
rotation
opposing roller
machines
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP83830082A
Other languages
German (de)
English (en)
Other versions
EP0093092A3 (fr
Inventor
Silvio Repetto
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Luigi Rizzi and Co SpA
Original Assignee
Luigi Rizzi and Co SpA
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
Application filed by Luigi Rizzi and Co SpA filed Critical Luigi Rizzi and Co SpA
Publication of EP0093092A2 publication Critical patent/EP0093092A2/fr
Publication of EP0093092A3 publication Critical patent/EP0093092A3/fr
Withdrawn legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C14—SKINS; HIDES; PELTS; LEATHER
    • C14B—MECHANICAL TREATMENT OR PROCESSING OF SKINS, HIDES OR LEATHER IN GENERAL; PELT-SHEARING MACHINES; INTESTINE-SPLITTING MACHINES
    • C14B1/00—Manufacture of leather; Machines or devices therefor
    • C14B1/02—Fleshing, unhairing, samming, stretching-out, setting-out, shaving, splitting, or skiving skins, hides, or leather
    • C14B1/04—Fleshing, unhairing, samming, stretching-out, setting-out, shaving, splitting, or skiving skins, hides, or leather using slicking, scraping, or smoothing-out cylinders or blades fixed on supports, e.g. cylinders, in a plane substantially at right angles to the working surface
    • C14B1/06—Fleshing, unhairing, samming, stretching-out, setting-out, shaving, splitting, or skiving skins, hides, or leather using slicking, scraping, or smoothing-out cylinders or blades fixed on supports, e.g. cylinders, in a plane substantially at right angles to the working surface in machines in which the working piece is maintained in contact with the working tools solely by means of rolls
    • C—CHEMISTRY; METALLURGY
    • C14—SKINS; HIDES; PELTS; LEATHER
    • C14B—MECHANICAL TREATMENT OR PROCESSING OF SKINS, HIDES OR LEATHER IN GENERAL; PELT-SHEARING MACHINES; INTESTINE-SPLITTING MACHINES
    • C14B17/00—Details of apparatus or machines for manufacturing or treating skins, hides, leather, or furs
    • C14B17/12—Safety devices specially adapted for leather-working machines

Definitions

  • the fleshing of the hide is effected whilst the same is still fresh after the flaying or after an initial lime pit processing, so that the hide is in very damp conditions, containing compact matter and clots of flesh or fat on the inside.
  • the fleshing of the hide consists in removing or cutting by means of rotating blades said clots or projections and this is done by passing the hide under tension in front of the series of blades, knives or the like generally connected to a rotating roller.
  • protecting shield a barrier or screen, hereinafter called protecting shield, which should be removed only at the time of closing the opposing roller towards the cylinder with blades, so pressing the hide to be processed.
  • the device according to the invention which provides a protecting shield, the position ing of which is synchronized with the closing and opening movements of the opposing roller which bears the hide to be processed.
  • the self-positioning protecting shield for the cylinder with blades in fleshing machines and the like consists of a shield or screen extending lengthwise according to the working length of the cylinder with blades and having width enough to cover the accesible area of the cylinder with blades itself.
  • the protecting shield is supported by one or several arms pivoting about the axis of the cylinder with blades, at least one of which being connected, by mechanical driving means, with one of the movable arms supporting the opposing roller.
  • the mechanical driving means can consist of crown gears connected by chains or of gear pairs reciprocally connected, or of a system of connecting rods, cranks, levers or the like, so realized as to supply the required velocity ratio between the rotation of the arms supporting the opposing roller and the rotation of the arm or arms supporting the protecting shield.
  • the fleshing machine or the like consists of a frame 1 (cut off in Figure 1), bearing the cylinder with blades 2.
  • the opposing roller 3 In front of the cylinder with blades 2, the opposing roller 3 is arranged, supported by the arm 4 rotating about the axis 5.
  • the opposing roller 3 is movable and it can be moved away from the cylinder with blades 2 by means of the connecting rod 6 and of the crank 7 rotating about the axis 8 according to the arrow F, in order to be settled from the "closed machine" position, shown with a continuous line in Figure 1, to the "open machine” position, shown with a chain in the same Figure 1 and haying references with the prime '.
  • the opposing roller 3 can also be approached to the cylinder with blades 2 by a contrary action of the connecting rod 6 and of the crank 7 in order to settle the machine from the "open machine” position to the "closed machine” position.
  • the moving away movement is actuated by the operator by known means, non shown, in order to allow the insertion of the hide to be processed 9 on the opposing roller 3, which is in the open position and shown with 3' in Figure 1.
  • rollers 10 and 11 which can be moved away from the opposing roller 3 at the opening, co-operate with said opposing roller 3 in the closed position.
  • the cylinder with blades 2 remains in rotation. It is then necessary to assure the safety of the operator by arranging a movable protecting shield 12, 12' in the sheltering position (shown with a chain in Figure 1),at the opening of the machine.
  • the movement of the protecting shield 12, supported by the arm 13, consists of a rotation about the same axis 14 supporting the cylinder with blades 2 and it is obtained, in the embodiment shown in the accompanying drawings, by means of a crown gear 15, connected by the chain 16 to the crown gear 17.
  • the crown gear 17 is integral and coaxial to the crown 18, connected by the chain 19 to the crown gear 20, having the axis 5 and integral to the arm 4.
  • the gear ratio between the crown 20 and the crown 15 is chosen so that, in correspondence to a rotation of the arm 4 enough to pass from the hide inserting position of the arm 4', shown with a chain, to the working position of the arm 4, shown with a continuous line, in which the opposing roller 3 bearing the hide 9 is positioned against the cylinder with blades 2, the protecting shield 12 can rotate from the protecting position of the shield 12' covering the rotating cylinder with blades 2 to the rest position in which the protecting shield 12 is situated far from the cutting area and enclosed in the covering 21, which covering 21 constitutes an external protection of the cylinder with blades 2.
  • the opening movement of the opposing roller 3 leads at the same time the protecting shield 12 to settle in the protecting position, while the closing movement of the opposing roller 3 leads the protecting shield 12 to settle in a position far from the cutting area, without any delay or phase difference with respect to the motion of the opposing roller 3.
  • the mechanical driving can be effected by means of a chain, if that be the case a double chain, as shown in Figure 2, according to the dimensioning criteria chosen for the machine.
  • the driving can of course be effected by means of different systems, for example by means of gear pairs having an appropriate gear ratio, providing, if that be the case, for appropriate reversal wheels in order to obtain the desired direction of rotation for the arm 13 supporting the protecting shield 12 according to the rotation of the arm 4 supporting the opposing roller 3, or by means of a system of connecting rods, levers and cranks, appropriately dimensioned, or the like.
  • the protecting shield in the illustrated example, consists of a metallic bent element, extending on an about 90° arc, but it can be otherwise shaped, in machines having a different configuration, with the corresponding change of the velocity ratio between the movement of rotation of the arm 4 supporting the opposing roller 3 and the movement of rotation of the arm 13 supporting the protecting shield 12.

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Excavating Of Shafts Or Tunnels (AREA)
  • Crushing And Pulverization Processes (AREA)
EP83830082A 1982-04-26 1983-04-18 Dispositif de protection pour le cylindre porte-lames dans les machines à écharner ou analogue d'une tannerie, comprenant une plaque protectrice mobile en synchronisme avec l'ouverture de la machine Withdrawn EP0093092A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT2094182 1982-04-26
IT20941/82A IT1151327B (it) 1982-04-26 1982-04-26 Dispositivo di protezione del cilindro a lame in macchine scarnatrici e simili per conceria,con scudo mobile sincronizzato con l'apertura della macchina

Publications (2)

Publication Number Publication Date
EP0093092A2 true EP0093092A2 (fr) 1983-11-02
EP0093092A3 EP0093092A3 (fr) 1984-09-12

Family

ID=11174376

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83830082A Withdrawn EP0093092A3 (fr) 1982-04-26 1983-04-18 Dispositif de protection pour le cylindre porte-lames dans les machines à écharner ou analogue d'une tannerie, comprenant une plaque protectrice mobile en synchronisme avec l'ouverture de la machine

Country Status (2)

Country Link
EP (1) EP0093092A3 (fr)
IT (1) IT1151327B (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2625222A1 (fr) * 1987-12-23 1989-06-30 Mercier Freres Dispositif de securite pour machine a travailler les peaux
FR2666350A1 (fr) * 1990-08-29 1992-03-06 Mercier Freres Machine de travail en continu pour cuirs et peaux.
CN101440414B (zh) * 2008-12-24 2012-09-05 浙江省湖州二轻机械总厂 五辊式挤水平展机

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR381518A (fr) * 1907-09-04 1908-01-14 Marius Sicard Protecteur pour machines à travailler les cuirs et les peaux
US2174895A (en) * 1938-12-27 1939-10-03 Russell Winn Leather working machine and protective device therefor
DE809933C (de) * 1949-08-27 1951-08-02 Turner Ag Maschf Schutzvorrichtung an Lederbearbeitungsmaschinen
DE1808382B2 (de) * 1968-11-12 1978-04-06 Strojosvit, N.P., Krnov (Tschechoslowakei) Einrichtung zum automatischen Aufmachen von Gerbereimaschinen

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR381518A (fr) * 1907-09-04 1908-01-14 Marius Sicard Protecteur pour machines à travailler les cuirs et les peaux
US2174895A (en) * 1938-12-27 1939-10-03 Russell Winn Leather working machine and protective device therefor
DE809933C (de) * 1949-08-27 1951-08-02 Turner Ag Maschf Schutzvorrichtung an Lederbearbeitungsmaschinen
DE1808382B2 (de) * 1968-11-12 1978-04-06 Strojosvit, N.P., Krnov (Tschechoslowakei) Einrichtung zum automatischen Aufmachen von Gerbereimaschinen

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2625222A1 (fr) * 1987-12-23 1989-06-30 Mercier Freres Dispositif de securite pour machine a travailler les peaux
FR2666350A1 (fr) * 1990-08-29 1992-03-06 Mercier Freres Machine de travail en continu pour cuirs et peaux.
CN101440414B (zh) * 2008-12-24 2012-09-05 浙江省湖州二轻机械总厂 五辊式挤水平展机

Also Published As

Publication number Publication date
IT8220941A0 (it) 1982-04-26
IT1151327B (it) 1986-12-17
EP0093092A3 (fr) 1984-09-12

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Inventor name: REPETTO, SILVIO