EP0470428B1 - Deckelverriegelung für mittel- bis hochtourige Laborzentrifugen - Google Patents

Deckelverriegelung für mittel- bis hochtourige Laborzentrifugen Download PDF

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Publication number
EP0470428B1
EP0470428B1 EP91112293A EP91112293A EP0470428B1 EP 0470428 B1 EP0470428 B1 EP 0470428B1 EP 91112293 A EP91112293 A EP 91112293A EP 91112293 A EP91112293 A EP 91112293A EP 0470428 B1 EP0470428 B1 EP 0470428B1
Authority
EP
European Patent Office
Prior art keywords
locking
locking member
locking mechanism
cover
housing
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP91112293A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0470428A2 (de
EP0470428A3 (en
Inventor
Wolfgang Dipl.-Ing. Tscheu
Sven Dipl.-Ing. Ruge
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.)
Eppendorf SE
Original Assignee
Eppendorf Netheler Hinz GmbH
Eppendorf Geraetebau Netheler and Hinz GmbH
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 Eppendorf Netheler Hinz GmbH, Eppendorf Geraetebau Netheler and Hinz GmbH filed Critical Eppendorf Netheler Hinz GmbH
Priority to AT9191112293T priority Critical patent/ATE105212T1/de
Publication of EP0470428A2 publication Critical patent/EP0470428A2/de
Publication of EP0470428A3 publication Critical patent/EP0470428A3/de
Application granted granted Critical
Publication of EP0470428B1 publication Critical patent/EP0470428B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04B—CENTRIFUGES
    • B04B7/00—Elements of centrifuges
    • B04B7/02—Casings; Lids
    • B04B7/06—Safety devices ; Regulating
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S292/00—Closure fasteners
    • Y10S292/69—Washing machine or stove closure latch
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T292/00—Closure fasteners
    • Y10T292/08—Bolts
    • Y10T292/096—Sliding
    • Y10T292/0961—Multiple head
    • Y10T292/0962—Operating means
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T292/00—Closure fasteners
    • Y10T292/08—Bolts
    • Y10T292/1099—Screw

Definitions

  • the invention relates to a lid lock for medium to high-speed laboratory centrifuges with a housing and lid, an axially movable bar, which has at least one latch engagement with a latch opening on the lid.
  • Such interlocks are known. They are made by relays. Such relays depend on the power supply. If the latter fails, the lock can open. When using a magnet, a locking position can be maintained even in the event of a power failure. However, it can be released if, in the event of damage, an impact or impact hits an element of the locking device. This is particularly serious when a relay working with magnetic force, in particular with spring support, is effective. Vibrations can then occur which arbitrarily permit opening.
  • a locking device is known with a rotary bolt which can be actuated by a handle or a corresponding drive. It is for locking a plate, the passage of an axis pin through a special hole in the other element is provided, the axis pin having a head with a cross section which, when the axis pin is rotated, creates the engagement behind an abutment. A manual operation with a handle head is shown.
  • the axis pin can only reach the area of the locking possibilities through slots in a certain orientation.
  • the locking is provided at right angles to a plate which is practically arranged as a lid. This known design is defective because strikes, vibrations or stops on cross pins can lead to the opening of the closure.
  • a locking with an electromagnet is known from FR-A-2 524 346. This clearly shows that in the event of a power failure, even if a spring force holds an electromagnet in its locking position, jumping off or returning could take place if part of the destroyed rotor hits this locking part.
  • the invention is therefore based on the object to provide a lid lock for medium and high-speed centrifuges, which remains securely in its locked position even in the event of failures, be it due to the bursting of the centrifuge rotor or even in the event of a power failure to actuate the bolt the lock itself is exposed to shock or impact stresses, while at the same time creating a small-scale solution.
  • a so-called medium or high-speed centrifuge works in the range from 15,000 g to 50,000 g.
  • a latch opening on the lid can be designed in the manner of an eyelet, into which one simply pushes a pin.
  • an electromagnat or a relay is known as the drive element. If, in the event of a power failure and in a dangerous state, the broken rotor strikes an element, the locking is released in such a known embodiment.
  • the axially displaceable bolt is rotatably supported, is provided with a rotary drive and a feed arrangement which on the one hand has a part arranged in the centrifuge and on the other hand has a profile on the bolt which are in engagement with one another and one of which Parts has an oblique to the axial direction of the locking engagement surface, and that the at least one opening on the lid has an entry slot for the passage of a tapered locking portion, which is followed by a reinforced locking portion corresponding to the diameter of the opening with a small undersize.
  • P refer the axially displaceable bolt is rotatably mounted in the housing.
  • the rotatable mounting of the bolt in conjunction with a rotary drive provides a safe engagement situation with the smallest space requirement, because the axial movement of the bolt precludes misalignment with the at least one bolt opening on the cover.
  • the claimed feed device is provided independently of the rotary drive, which should only introduce one movement.
  • the feed is achieved in the simplest solution by the special design as a threaded section with a pitch in the axial direction. In the simplest case, it is a bayonet-like guide which, when actuated, produces a bolt engagement.
  • the axial movability of the bolt is important and the rotary drive for the lid lock is provided for this.
  • This feature is particularly important because two engagement elements interact in comparison with the different designs. It is preferred that two or more openings are arranged on the cover and locking sections on the bolt. This opens up all possibilities for multiplication. For the axially movable mounting of the bolt, however, an engagement element designed as a threaded section with a pitch in the axial direction is preferred.
  • a wall part defining an engagement element can be extended to such an extent that possible failures no longer have to be taken into account.
  • a threaded section extends by at least 25 ° in the circumferential direction of the rotatable latch.
  • a threaded section can advantageously have several gears.
  • the threaded section located on the bolt which is designed as a spindle, is particularly preferred.
  • the threaded section forms the basis for the normal drive.
  • the threaded section has a continuously identical pitch, in addition it is preferred that the threaded section has a different pitch over its length, by means of which the end axial movement of the bolt is carried out faster than the initial axial movement.
  • the particularly preferred embodiment is that the thread at the end which corresponds to the engagement position of the bolt has a substantially pitch-free course.
  • the slope-free passage forms a particularly firm restraint with additional security in the event of an emergency and shock loads on the bolt.
  • the invention is preferably based on the bolt itself being designed as a rod or linkage which is rotatably mounted and is displaceable in the axial direction.
  • This rod has different lengths in different designs, in particular with different diameters.
  • an advantageous embodiment is that a reinforced locking section is designed conically in the feed direction for engagement in the opening.
  • the outer walls of a centrifuge can be used to form a guide in order to ensure that the bolt can be axially displaced in connection with the rotary drive, in particular or without a geared motor, but to prevent rotation of the rotary drive, in particular the motor itself.
  • the gear motor providing the torque is designed with a high reduction ratio. This results in a high torque. If the bolt is connected to the rotary drive itself, there is also a connection in a countershaft gear coupling, which allows any step-up or step-down. It is important that the bolt is driven by rotation, it being reserved that the bolt is arranged in the axial extension of the shaft of the geared motor.
  • a motor known above is firmly connected to the bolt and secured against rotation, but is movably guided in the housing in the axial direction of the bolt.
  • the at least one opening on the lid is arranged on an extension extending from the lid, for which lateral guides are arranged in the centrifuge in the area of the latch in the engaged position.
  • the section with the reduced cross section is held in the engaged position on the bolt as soon as it is unloaded.
  • Cylindrical guide sections are expediently provided on the rotatably mounted bolt which are guided in guide bushings on the housing. This is a simple design, which is also space-saving, especially since the same means or lateral guide stops can also be provided for the lugs arranged on the cover.
  • a trigger switch is also included, which is arranged in the housing and can be actuated by striking an attachment with an opening when the cover is closed.
  • one end of the bolt is provided with an engagement profile, in particular a slot for a tool, and in the extension of the bolt, a wall opening is arranged in the housing of the centrifuge for introducing an actuating instrument, in particular a screwdriver.
  • a particularly preferred embodiment is that the engagement profiles on the Motor shaft of the bolt drive motor are arranged.
  • FIG. 1 shows a laboratory centrifuge 1 with a housing.
  • This housing 2 has in its cover plate a hinge 3 for a hinged cover 4.
  • a rotor 6 for a laboratory centrifuge with all parts is stored within the space 5.
  • This rotor 6 is covered in the room 5 on the one hand by the wall parts and the floor of the room and on the other hand by the cover 4.
  • a cover lock 9 is provided at a distance from or opposite to the hinge 3, as will be described in more detail below.
  • the lid 4 can be seen from FIGS. 2 and 3. It can be seen that lugs 10, 11 directed downward are arranged on the cover. For the lugs 10, 11 on the cover 4, 2 guide openings 47, 48 are arranged in the housing, which in particular hold the area 2 of the opening 15 together, so that the lug cannot expand when the bolt engages and loads.
  • lugs which are attached to the cover by means of screws 12, 13, for example, have a web-like surface 14 in the side view according to FIG. 4, but a circular opening 15 at their lower end, which in turn is open or downward through a slot 16 is accessible.
  • a latch 17 is guided within the housing of the laboratory centrifuge according to FIGS. 2 and 3.
  • This bar is designed as a rod or rod.
  • This bar 17 has different sections over its length. It is guided by means of cylindrical sections 18, 19 into cylindrical guide openings 20, 21 in components or guide bushes 22, 23 which are mounted in the housing of the laboratory centrifuge.
  • the section 19 is, for example, a cylinder which is mounted in the guide opening 21 with a small undersize.
  • the section 18 is correspondingly guided in the guide opening 20, so that the bolt 17 is movable as a rod in its axial direction.
  • the section 18 is, however, designed in a special way with an engagement surface 24 which extends in the circumference and radial direction, into which a grub screw or projection 25 engages on the component 22, which is arranged in the housing, just like the other components 22, 23 which are practically guide blocks with the guide openings 20,21.
  • Such engagement forms a propelling element for the rod or linkage, which forms the bolt 17.
  • a rod or linkage is on its section 18 opposite end connected by a clutch 26 to a gear motor 27 which has a reduction gear.
  • a gear motor 27 is mounted in lateral guides 28, 29 in a rotationally fixed but axially displaceable manner.
  • the output shaft 30 is in axial alignment with the bolt 17, which is designed as a rotatable rod.
  • this rod has the sections 31, 32 with a cross section which is so greatly reduced that this section passes through the slot 16 (FIG. 4) can engage in the opening 15 in the lugs 10, 11 on the lid.
  • the propulsion results from the interaction of the projection 25 with the engagement surface 24.
  • the cones 34, 35 occur on the bolt 17 or the rod in question in the opening 15 (FIG. 4) and, due to their taper, still perform certain alignment functions.
  • cylindrical locking sections 36, 37 enter the openings 15 and thus hold the cover 4 in place.
  • the cylindrical locking sections 36, 37 have a diameter which fits into the openings with very little play, one of which is designated by 15 in FIG.
  • the engagement surface 24 is designed in the form of a spindle 45, which thus also forms the section 18.
  • the motor 27 can move axially in its mounting.
  • an axially displaceable clutch is arranged at 26, which permits torque transmission even when the engagement changes axially.
  • a switch actuating means 38 is arranged on the bolt 17 or on such a rod as a thickening. It works depending on the setting of the linkage with one of the 39 or other 40 actuators of two limit switches 41, 42, which are arranged obliquely to the axis of the bolt 17 so that the actuators 39, 40 lie in the line of the bolt 17. As a result, the switch actuation means 38 can engage with one or the other actuation element 39, 40 for switching the motor 27.
  • the distance between the actuators 39, 40 is such that a switch-off always takes place when either the tapered sections 31, 32 their area of the lugs 10, 11 or the locking sections 36, 37 are arranged in the openings of the lugs 10, 11 , such an opening being drawn at 15 in FIG. 4.
  • a spindle 51 has gear sections 52, 43 with a different pitch over its length, a substantially pitch-free gear 44 then being arranged at the end for secure locking.
  • the passage sections 52, 43 form the engagement surface 46.
  • a profile 49 is arranged for example as a slot in the end face of the spindle arranged there.
  • a wall opening 50 in the wall of the housing 2 of the laboratory centrifuge for carrying out a tool.
  • This wall opening can be closed. They can be used to insert a hand tool for engaging the profiling 49 in order to carry out manual operation in the event of a power failure.

Landscapes

  • Centrifugal Separators (AREA)
EP91112293A 1990-08-08 1991-07-23 Deckelverriegelung für mittel- bis hochtourige Laborzentrifugen Expired - Lifetime EP0470428B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT9191112293T ATE105212T1 (de) 1990-08-08 1991-07-23 Deckelverriegelung fuer mittel- bis hochtourige laborzentrifugen.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4025134 1990-08-08
DE4025134A DE4025134C1 (sv) 1990-08-08 1990-08-08

Publications (3)

Publication Number Publication Date
EP0470428A2 EP0470428A2 (de) 1992-02-12
EP0470428A3 EP0470428A3 (en) 1992-05-13
EP0470428B1 true EP0470428B1 (de) 1994-05-04

Family

ID=6411858

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91112293A Expired - Lifetime EP0470428B1 (de) 1990-08-08 1991-07-23 Deckelverriegelung für mittel- bis hochtourige Laborzentrifugen

Country Status (6)

Country Link
US (1) US5280975A (sv)
EP (1) EP0470428B1 (sv)
JP (1) JPH0647086B2 (sv)
AT (1) ATE105212T1 (sv)
DE (2) DE4025134C1 (sv)
ES (1) ES2053247T3 (sv)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0819471A1 (de) * 1996-07-20 1998-01-21 Heraeus Instruments GmbH Schloss

Families Citing this family (19)

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Publication number Priority date Publication date Assignee Title
DE9417388U1 (de) * 1994-10-29 1994-12-15 Sigma Laborzentrifugen Gmbh, 37520 Osterode Schließmechanismus für den Deckel einer Laborzentrifuge
DE29806972U1 (de) * 1998-04-20 1999-05-20 Andreas Hettich GmbH & Co. KG, 78532 Tuttlingen Sicherheitsverschluß für Deckel
FR2790407B1 (fr) * 1999-03-01 2001-06-01 Jouan Centrifugeuse a refroidissement par tube de ranque
FR2790406B1 (fr) * 1999-03-01 2001-06-01 Jouan Centrifugeuse a entrainement pneumatique et a filtration de l'atmosphere de son enceinte
JP3879360B2 (ja) * 2000-03-17 2007-02-14 日立工機株式会社 遠心機
DE10017310B4 (de) * 2000-04-10 2006-12-14 Kendro Laboratory Products Gmbh Verriegelung für einen um eine horizontale Achse schwenkbar angeordneten Gehäusedeckel einer Labor-Zentrifuge
DE10017314B4 (de) * 2000-04-10 2005-02-24 Kendro Laboratory Products Gmbh Verriegelung für Gehäusedeckel von Laborgeräten
DE10164272C2 (de) * 2001-12-27 2003-11-06 Sigma Laborzentrifugen Gmbh Verriegelungseinrichtung für den Deckel des Gehäuses einer Laborzentrifuge
JP4396528B2 (ja) * 2005-01-11 2010-01-13 日立工機株式会社 遠心分離機
JP2006198564A (ja) * 2005-01-24 2006-08-03 Hitachi Koki Co Ltd 遠心分離機
US7500942B2 (en) 2005-01-24 2009-03-10 Hitachi Koki Co, Ltd. Centrifugal separator with door lock safety device
US7555933B2 (en) * 2006-08-01 2009-07-07 Thermo Fisher Scientific Inc. Method and software for detecting vacuum concentrator ends-of-runs
DE102006041950A1 (de) * 2006-08-30 2008-03-06 Karl Storz Gmbh & Co.Kg Stroboskopmodul mit einer Kupplung
JP4609443B2 (ja) * 2007-02-28 2011-01-12 日立工機株式会社 遠心分離機
JP4780044B2 (ja) * 2007-06-11 2011-09-28 日立工機株式会社 遠心分離機
DE102008010272B4 (de) 2008-02-21 2013-08-22 Thermo Electron Led Gmbh Deckelverschluss für Gehäusedeckel von Laborgeräten und dergleichen
FR3005274B1 (fr) * 2013-05-02 2015-05-01 Afi Centrifuge Centrifugeuse de laboratoire munie de moyens pour le verrouillage d'un couvercle dans sa position fermee
CN106345769B (zh) * 2016-09-22 2018-05-08 四川杜伯特科技有限公司 一种舱门自动吸合装置
DE102017128363A1 (de) * 2017-11-30 2019-06-06 Multivac Sepp Haggenmüller Se & Co. Kg Verpackungsmaschine mit aufklappbarer schutzabdeckung

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0819471A1 (de) * 1996-07-20 1998-01-21 Heraeus Instruments GmbH Schloss
US5915766A (en) * 1996-07-20 1999-06-29 Kendro Laboratory Products Gmbh Locking device

Also Published As

Publication number Publication date
EP0470428A2 (de) 1992-02-12
DE59101553D1 (de) 1994-06-09
ATE105212T1 (de) 1994-05-15
US5280975A (en) 1994-01-25
EP0470428A3 (en) 1992-05-13
JPH0647086B2 (ja) 1994-06-22
ES2053247T3 (es) 1994-07-16
DE4025134C1 (sv) 1991-11-14
JPH04227079A (ja) 1992-08-17

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