EP3020318B1 - Drehsprinkler für professionelle geschirrspülmaschine oder desinfektionsvorrichtung - Google Patents

Drehsprinkler für professionelle geschirrspülmaschine oder desinfektionsvorrichtung Download PDF

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Publication number
EP3020318B1
EP3020318B1 EP15188817.9A EP15188817A EP3020318B1 EP 3020318 B1 EP3020318 B1 EP 3020318B1 EP 15188817 A EP15188817 A EP 15188817A EP 3020318 B1 EP3020318 B1 EP 3020318B1
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EP
European Patent Office
Prior art keywords
tubular body
sprinkler
sprinkler according
terminals
hole
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.)
Active
Application number
EP15188817.9A
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English (en)
French (fr)
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EP3020318A1 (de
Inventor
Damiano Piazza
Mauro Tosi
Ezio Gobbi
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.)
Bonferraro SpA
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Bonferraro SpA
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Priority to PL15188817T priority Critical patent/PL3020318T3/pl
Publication of EP3020318A1 publication Critical patent/EP3020318A1/de
Application granted granted Critical
Publication of EP3020318B1 publication Critical patent/EP3020318B1/de
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Classifications

    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L15/00—Washing or rinsing machines for crockery or tableware
    • A47L15/14—Washing or rinsing machines for crockery or tableware with stationary crockery baskets and spraying devices within the cleaning chamber
    • A47L15/18—Washing or rinsing machines for crockery or tableware with stationary crockery baskets and spraying devices within the cleaning chamber with movably-mounted spraying devices
    • A47L15/22—Rotary spraying devices
    • A47L15/23—Rotary spraying devices moved by means of the sprays
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L15/00—Washing or rinsing machines for crockery or tableware
    • A47L15/0018—Controlling processes, i.e. processes to control the operation of the machine characterised by the purpose or target of the control
    • A47L15/0049—Detection or prevention of malfunction, including accident prevention
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L2401/00—Automatic detection in controlling methods of washing or rinsing machines for crockery or tableware, e.g. information provided by sensors entered into controlling devices
    • A47L2401/30—Variation of electrical, magnetical or optical quantities

Definitions

  • the present invention relates to revolving sprinklers for professional dishwashers or similar machines, such as apparatuses for disinfection, and in particular to a sprinkler provided with closure terminals divided into two elements of which one element is easily removable.
  • a conventional revolving sprinkler essentially consists of an elongated tubular body that is centrally pivoted on a hollow attachment with a vertical axis, corresponding to the axis of rotation of the sprinkler, mounted at the outlet of a water supply duct.
  • the rotatory motion about this axis is usually created by at least one propulsion nozzle at each end, the jet emitted by such a nozzle being substantially perpendicular to the axis of rotation, while washing nozzles are arranged along the sprinkler to emit jets substantially parallel to the axis of rotation.
  • Each end of the tubular body of the sprinkler is closed by a terminal in which there may be formed more washing nozzles and/or a housing for a magnet, which is used in combination with a Reed sensor for detecting the speed of rotation of the sprinkler.
  • These terminals are mounted on the tubular body in a removable manner, typically by means of screws, in order to access the internal cavity of the sprinkler through its ends when it is necessary to carry out the periodical cleaning or sanitizing of the sprinkler by removing dirt and deposits that can build up inside it.
  • EP 1870113 describes a sprinkler in which the terminals are not fixed by screws but by resilient locking means which engage corresponding seats formed on the tubular body or on the terminal, so as to allow a rapid removal and reapplication of the terminal without the use of tools.
  • a similar solution is effective in reducing the intervention times but does not solve the problems of tightness, which on the contrary may be more serious since the elastic locking is less tight than the fixing with screws.
  • JP H09 42243 describes a similar sprinkler with monolithic terminals that are mounted on the tubular body by means of resilient locking means, only that in this case there is an O-ring therebetween and the shape of the terminal and body is a cylindrical shape of circular cross-section, which poses a restraint on the shape of the sprinkler body. Furthermore, the above-mentioned tightness problem caused by the different coefficients of thermal expansion remains unsolved.
  • WO 2011/154813 describes a sprinkler in which each terminal is formed by two elements: a first element fixed by screws to the tubular body and a second element rotatably mounted on the first element and movable between a closed position and an open position in which it allows access to the internal cavity of the sprinkler. More specifically, the second element is locked in the closed position via an elastic clip which engages latches formed on the first element, so as to allow a rapid opening and closing of the terminal without the use of tools by means of the rotation of the second element around an axis contained in the plane of rotation of the sprinkler and perpendicular to the longitudinal axis thereof.
  • a similar solution is effective in reducing the intervention times but does not solve completely the problems of tightness, because although the first element remains mounted on the tubular body allowing to apply a sealant therebetween now the water tightness is difficult between the two elements which make up the terminal.
  • the sealing is obtained by means of a peripheral rib that protrudes from the second element and fits into a corresponding peripheral groove formed in the first element, trying to accomplish a labyrinth seal which is the most common solution for two rigid elements which are frontally coupled by means of the above-mentioned rotation.
  • the object of the present invention is therefore to provide a revolving sprinkler which overcomes the above-described limitations of prior art sprinklers.
  • This object is achieved by means of a sprinkler comprising closure terminals made up of two elements which are slidably coupled, with elastic locking of the second element on the sprinkler, the water tightness between them being ensured by an O-ring interposed between two cylindrical portions of preferably circular cross-section.
  • the main advantage of the sprinkler according to the present invention is that of having a greater efficacy because the water tightness ensured by an O-ring arranged between the cylindrical parts is more effective than the prior art labyrinth seal, moreover particles of dirt do not affect it since they are removed during the sliding coupling of the two elements of the terminal.
  • a further advantage of this sprinkler derives from the fact that its closure terminals have a higher strength and reliability, thanks to the absence of delicate details that are not required for a sliding coupling.
  • a revolving sprinkler according to the invention comprises a tubular body 1 provided with a plurality of wash and/or propulsion nozzles as well as a central socket 2 for its mounting on a supply pipe (not shown).
  • a revolving sprinkler which is fed from above, but it is clear that what is said also applies to a sprinkler with which is fed from below, i.e. with socket 2 facing downwards.
  • body 1 is shown traditionally formed by two superimposed shaped panels of metallic material (e.g. stainless steel) that are coupled along the longitudinal sides by folding the edges of the top plate over the edges of the bottom plate, but it is clear that what is said also applies to a sprinkler with the body realized by means of other processes and/or other materials.
  • a closure terminal formed by a first element 3, secured to body 1 by means of a screw 4, and by a second element 5 which is slidingly coupled to the first element 3 and is secured to body 1 through elastic locking means.
  • the second element 5 is provided with a longitudinal tab 6 which extends up to screw 4, whose head is received in a hole 7 of tab 6 so as to act as a retaining catch. For the removal of the second element 5 it is therefore sufficient to lift tab 6, which is flexible enough for the purpose, and disengage it from screw 4 so as to be able to slide back the second element 5.
  • the first element 3 is preferably constituted by an annular body 8 whose external contour matches in shape and size the internal end cross-section of the tubular body 1.
  • Said annular body 8 is preferably provided with a frontal peripheral flange 9 that goes into abutment on the end of the tubular body 1, so as to define the depth of insertion of body 8 into body 1.
  • a hole 10 formed in a rear longitudinal tab 11 of the first element 3 arrives in correspondence with a hole 12 formed in the tubular body 1, so that screw 4 passing through said hole 12 can engage tab 11 thereby securing the first element 3.
  • the first element 3 is also provided with an axial sleeve 13, preferably of circular shape, that extends outwardly from a front wall which closes the annular body 8. Therefore, water can exit the end of body 1 of the sprinkler only through said sleeve 13, on which there is inserted an O-ring 14 that is preferably housed in a suitable seat formed on the external surface of sleeve 13.
  • the second element 5 is preferably constituted by an annular body 15 whose internal cross-section matches in shape and size the external end contour of the tubular body 1.
  • Said annular body 15 is provided with an axial cylindrical portion 16, closed at the front, which is shaped and sized to receive sleeve 13 and achieve therewith a cylindrical sealing by means of O-ring 14.
  • An inclined nozzle 17 ( Fig.3 ) is preferably formed in portion 16 to emit a jet along the longitudinal axis of the sprinkler, and a housing 18 is preferably provided next to portion 16 to house a magnet used to detect the speed of rotation of the sprinkler as previously mentioned.
  • the two terminals of the sprinkler are structurally identical to minimize the cost of production, however only one of them will contain the magnet and they will be mounted in inverted positions at the two ends as shown in figures 1 and 3 .
  • the sprinkler according to the present invention achieves the desired results of optimal water tightness, strength and ease of removal and reapplication of the terminals since it is sufficient to disengage tab 6 from screw 4 to remove the second element 5 and to gain access to the interior of the tubular body 1 through sleeve 13.
  • the second element 5 is repositioned on the sprinkler with great ease and speed without any risk of breaking delicate plastic details and with the guarantee of tightness ensured by the cylindrical coupling between sleeve 13 and portion 16 with the interposition of gasket 14 (which can be replaced with great ease in case of breakage or wear).
  • the elastic locking of the second element 5 could be realized on the first element 3 instead of directly on the tubular body 1 as illustrated above, or the first element 3 could be mounted externally on the sprinkler body 1 in which case of course the shapes and sizes of bodies 8 and 15 would be modified accordingly.

Landscapes

  • Fire-Extinguishing By Fire Departments, And Fire-Extinguishing Equipment And Control Thereof (AREA)
  • Washing And Drying Of Tableware (AREA)

Claims (10)

  1. Rotationssprinkler, umfassend einen endseitig offenen, rohrförmigen Körper (1), der mit Wasch- und/oder Antriebspritzdüsen versehen ist, eine Fassung (2) zur dessen Montage an einer Wasserversorgungsleitung, und einen verschließbaren Abschluss, der an beiden Enden des rohrförmigen Körpers (1) angebracht ist, wobei jeder der beiden veraschließbaren Abschlüsse aus einem ersten Element (3) hergestellt ist, welches an dem rohrförmigen Körper (1) festgelegt ist, und aus einem zweiten Element (5), das mittels eines elastischen Verriegelungsmittels an dem Sprinkler arretiert ist, dadurch gekennzeichnet, dass die besagten, ersten und zweiten Elemente (3, 5) verschiebbar gekoppelt sind und eine wasserdichte Kupplung zwischen den beiden mittels eines O-Rings (14) erreichen, der zwischen zwei zylinderförmigen Teilen (13, 16) eingefügt ist, die bevorzugt einen kreisförmigen Querschnitt aufweisen, wobei eines der beiden besagten, zylinderförmigen Teile (13, 16) an dem ersten Element (3) ausgebildet ist und das andere von den beiden zylinderförmigen Teilen (13, 16) an dem zweiten Element (5) gebildet ist.
  2. Rotationssprinkler gemäß Anspruch 1, dadurch gekennzeichnet, dass das erste Element (3) innerhalb des rohrförmigen Körpers (1) eingepasst ist und das zweite Element (5) außerhalb des rohrförmigen Körpers (1) montiert ist.
  3. Rotationssprinkler gemäß Anspruch 2, dadurch gekennzeichnet, dass das erste Element (3) substantiell aus einem ringförmigen Körper (8) besteht, dessen Außenkontur von der Form und der Größe zum Innenquerschnitt des Endabschnitts des rohrförmigen Körpers (1) passt, und das zweite Element (5) substantiell aus einem ringförmigen Körper (15) besteht, dessen Innenquerschnitt hinsichtlich Form und Größe zu der Kontur des äußeren Endes des rohrförmigen Körpers (1) passt.
  4. Rotationssprinkler gemäß Anspruch 2 oder 3, dadurch gekennzeichnet, dass der ringförmige Körper (8) mit einem stirnseitigen Außenflansch (9) versehen ist, der dazu geeignet ist, die Tiefe der Einführung des ringförmigen Körpers (8) in den Rohrkörper (1) festzulegen.
  5. Rotationssprinkler gemäß Anspruch 3 oder 4, dadurch gekennzeichnet, dass das erste Element (3) mit einer rückwärtigen, längsgerichteten Lasche (11) versehen ist, die ein Loch (10) aufweist, das als Entsprechung zu dem in dem rohrförmigen Körper ausgebildeten Loch (12) in dem rohrförmigen Körper (1) geformt ist, wobei das erste Element (3) an dem rohrförmigen Körper (1) mittels einer Schraube (4) festgelegt ist, die das besagte Loch (12) in dem rohrförmigen Körper (1) durchsetzt und in das Loch (10) der besagten Lasche (11) eingreift.
  6. Rotationssprinkler gemäß Anspruch 5, dadurch gekennzeichnet, dass das elastische Verriegelungsmittel des zweiten Elements (5) aus einer flexiblen längsgerichteten Lasche (6) besteht, die sich von dem zweiten Element (5) bis zu der Schraube (4) erstreckt und mit einem Loch (7) zur Aufnahme des Kopfes der Schraube (4) versehen ist.
  7. Rotationssprinkler gemäß einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass das erste Element (3) mit einer axialen Hülse (13) versehen ist, die sich von einer Vorderseite nach außen erstreckt, und das zweite Element (5) mit einem axialen, zylinderförmigen Teil (16) versehen ist, das frontal verschlossen ist und das hinsichtlich Form und Größe zur Aufnahme der besagten Hülse (13) ausgelegt ist und somit eine zylinderförmige Abdichtung mittels des O-Ringes (14) erreicht, der bevorzugt in einer Aufnahme untergebracht ist, die an der Außenfläche der Hülse (13) ausgebildet ist.
  8. Rotationssprinkler gemäß einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass das zweite Element (5) an wenigstens einem der Abschlüsse mit einer geneigten Düse (17) versehen ist, die dazu ausgelegt ist, einen Strahl entlang der Längsachse des Rotationssprinklers auszustoßen.
  9. Rotationssprinkler gemäß einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass das zweite Element (5) an wenigstens einem der Abschlüsse mit einem in einem Gehäuse (18) aufgenommenen Magneten versehen ist.
  10. Rotationssprinkler gemäß einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die zwei Abschlüsse strukturell identisch sind und an invertierten Postionen montiert sind.
EP15188817.9A 2014-11-12 2015-10-07 Drehsprinkler für professionelle geschirrspülmaschine oder desinfektionsvorrichtung Active EP3020318B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL15188817T PL3020318T3 (pl) 2014-11-12 2015-10-07 Obrotowy spryskiwacz do przemysłowej zmywarki lub aparatu dezynfekcyjnego

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ITMI20141947 2014-11-12

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EP3020318A1 EP3020318A1 (de) 2016-05-18
EP3020318B1 true EP3020318B1 (de) 2018-06-13

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EP (1) EP3020318B1 (de)
PL (1) PL3020318T3 (de)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0942243A (ja) * 1995-05-23 1997-02-10 Hoshizaki Electric Co Ltd 二部材の連結構造

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6964090B2 (en) * 2004-01-06 2005-11-15 Premark Feg L.L.C. Arm construction for warewash machine and method of manufacturing
ATE432719T1 (de) 2006-06-21 2009-06-15 Getinge Disinfection Ab Desinfektionsvorrichtung mit sprühmitteln
IT1403024B1 (it) 2010-06-10 2013-09-27 Steelco Spa Girante di lavaggio e macchina di lavaggio comprendente tale girante

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0942243A (ja) * 1995-05-23 1997-02-10 Hoshizaki Electric Co Ltd 二部材の連結構造

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PL3020318T3 (pl) 2018-11-30

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