EP0111530B1 - Fixing device - Google Patents

Fixing device Download PDF

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Publication number
EP0111530B1
EP0111530B1 EP83901954A EP83901954A EP0111530B1 EP 0111530 B1 EP0111530 B1 EP 0111530B1 EP 83901954 A EP83901954 A EP 83901954A EP 83901954 A EP83901954 A EP 83901954A EP 0111530 B1 EP0111530 B1 EP 0111530B1
Authority
EP
European Patent Office
Prior art keywords
vacuum
covering element
cells
air
connection
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
Application number
EP83901954A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0111530A1 (en
Inventor
Borislav Simic
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.)
SIMIC Borislav
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to AT83901954T priority Critical patent/ATE26664T1/de
Publication of EP0111530A1 publication Critical patent/EP0111530A1/en
Application granted granted Critical
Publication of EP0111530B1 publication Critical patent/EP0111530B1/en
Expired legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B11/00—Work holders not covered by any preceding group in the subclass, e.g. magnetic work holders, vacuum work holders
    • B25B11/005—Vacuum work holders

Definitions

  • This invention relates to a fixing device with a plurality of vacuum cells, each capable of being connected to a vacuum source common to the cells via at least one air channel formed in the device, the vacuum cells being recesses in a base element, over which an elastically deformable covering element is arranged, against which preferably plane objects are intended to be secured.
  • Fixing devices of said kind are previously known, e.g. a mat of rubber or a rubbery material being provided with a plurality of openings, which are in a communicating connection with the vacuum source.
  • a negative pressure arises in the openings covered by the workpiece when the vacuum source is connected, the workpiece being fixed in its position.
  • the openings not being covered or only partly covered by the workpiece provide an open connection between the vacuum source and the atmosphere. Therefore a fixing device made according to these principles requires a large working volume of air and consequently also a great pump capacity for securing objects. This makes great demands on the utilized pump equipment and brings essential costs.
  • valve arrangement associated with this known fixing device comprises both balls and springs, which makes the construction very complicated.
  • the use of these and similar valve arrangements also brings the risk of a wrong function due to clogging, as particles in the form of chips and the like often occurring in close proximity to the fixing device can easily penetrate the sensitive interior portions of the construction.
  • DE-A-2 942 876 shows a fixing device having a valve mechanism in the form of an opening in an elastically deformable covering element. Said opening is provided to be closed against a seat in the form of a recess of a body. However the orifice connected to the air passage and the recess is so arranged that impurities or other particles easily can be sucked into said orifice and cause operational disturbances.
  • the object of the invention to provide a fixing device, the construction of which is simple and which comprises the least possible number of clogging components. Moreover, the construction should be embodied so that possible impurities occurring in its air channels and air ways in the form of particles, e.g. chips, can be easily removed without unnecessary waste of time. Another object of the new construction is that it should be capable of operating with the least possible vacuum so that relatively simple vacuum equipment can be utilized.
  • a fixing device of the kind mentioned above satisfying the demands made is according to the invention characterized in that an orifice of the respective air channel is formed by a raised portion of the respective recess and forms a seat of a membrane valve, whose membrane, which can be moved from a closing position, is farmed from a part of the covering element, and that the covering element is provided with passing openings which maintain a communicating connection with the interior of the vacuum cell when the membrane valve is closed as well as when it is open.
  • the fixing device illustrated in Fig. 1 consists of a plate, which is composed of a base element 10 with rectangular sides and a covering element 14 articulatedly connected to this at one long side 12.
  • the covering element is dimensioned to cover the upper surface of the base element completely when it bears against the same.
  • the base element 10 manufactured as a block of metal, hard plastic or the like comprises a great number of air channels partly ending in a common connection means 16 located at one side of the block and intended for connection to a vacuum source not shown, and partly in the respective vacuum cells 18 made at the upper side of the base element.
  • the covering element 14 which is articulatedly connected to the base plate 10 along said one long side 12 by means of hinges, gluing or in another way, is elastic and easily deformable so that it can operate as a membrane.
  • the covering element preferably consists of a rubber disc which can have a thickness of e.g. 3-5 mm, or of a steel disc which can have a thickness of e.g. 0.5 mm.
  • the thickness relations are of course variable. However, what is essential is that the disc is capable of being resiliently deformed in connection with the evacuation of the vacuum cells 18.
  • the fixing device can have many different uses. Thus, it can e.g. be a supporting element on a workbench for retaining workpieces. It can also be used in connection with a lifting device for retaining objects. In the latter case the placement of the plate in the room can be reversed to what applies to its use on a workbench.
  • FIGs. 2 and 3 one single vacuum cell 18'as wei) as surrounding parts of a plate according to Fig. 1 are shown.
  • An air channel 20 leading from the vacuum cell to a channel 22 common to additional similar air channels is illustrated in the base element 10'.
  • the vacuum cell 18' is made at the upper surface of the base element 10' and the air channel 20 ends at an annular section 24 projecting past the bottom 26 of the vacuum cell but terminating somewhat below the upper surface 28 of the base plate.
  • the fixing device is illustrated in its working position, i.e. when the covering element 14' bears against the upper surface 28 of the base element 10'. However, no working piece has still been placed on the covering element.
  • In connection with the vacuum cell 18' there is a plurality of similar holes 30 through the covering element outside the extension of the defining surface of the air channel 24.
  • the holes 30 are very fine and their number is not critical for the relative purpose.
  • the arrangement according to Figs. 2 and 3 is such that the vacuum cell 18' at connection to the vacuum source via said air channels 20 is exposed to a relatively rapid air stream in immediate connection with the orifice 32 of the air channel whereas the air stream will have a slower course at the bottom 26 of the vacuum cell.
  • This has the effect that possible particles in the form of chips and the like unintentionally passing into the vacuum 18' are collected at its bottom 26 and are prevented from being moved up to and down through the air channel 20.
  • the vacuum cell serves as a so-called particle trap.
  • the portion of the covering plate 14' located above the orifice 32 thereof is pressed downwards so that the air channel 20 is blocked at the orifice 32.
  • this object prevents air from passing through the holes 30 of the covering element 14' which has the effect that a vacuum is created in the vacuum cell 18'. Due to coaction between a plurality of such vacuum cells an object (not shown) placed on top of the covering element 14' will be fixed in the intended position with a great force. As vacuum cells located outside the defining surface of the object have the connections with the respective channels closed by means of the portions of the covering element 14' serving as membrane a vacuum pump utilized to this end need not have so great a power to fulfil its purpose.
  • the embodiment of a plate illustrated with reference to Figs. 2 and 3 is especially suitable for securing substantially plane objects which can be somewhat air permeable. If the objects are compact and do not let any air pass at all, the same demands, however, are not made on the fixing device. This can in that case, e.g. as far as object of the type plastic film and the like are concerned, be made in a somewhat simpler manner in such a way that the covering element can lack holes completely.
  • the vacuum cell 18'" is deepest in connection with the front end of a corresponding flap 36, which is cut in the covering element 14"'.
  • an object 38 is placed so that it covers one of the vacuum cells 18"' shown, whereas another similar vacuum cell is outside the limiting line of the object.
  • the flap 36 closes the air channel 40 so that no air passes from the atmosphere.
  • the other flap does not reach completely down to the orifice 32'" of the air channel, resulting in that the vacuum cell will have a negative pressure so that the object 38 "is sucked fast".
  • the air channels 40 like at the embodiment according to Figs.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Jigs For Machine Tools (AREA)
  • Hooks, Suction Cups, And Attachment By Adhesive Means (AREA)
EP83901954A 1982-06-07 1983-06-06 Fixing device Expired EP0111530B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT83901954T ATE26664T1 (de) 1982-06-07 1983-06-06 Fixiervorrichtung.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE8203517A SE443316B (sv) 1982-06-07 1982-06-07 Med vakuum arbetande fixeringsanordning
SE8203517 1982-06-07

Publications (2)

Publication Number Publication Date
EP0111530A1 EP0111530A1 (en) 1984-06-27
EP0111530B1 true EP0111530B1 (en) 1987-04-22

Family

ID=20346997

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83901954A Expired EP0111530B1 (en) 1982-06-07 1983-06-06 Fixing device

Country Status (5)

Country Link
EP (1) EP0111530B1 (ja)
JP (1) JPS59501053A (ja)
DE (1) DE3371048D1 (ja)
SE (1) SE443316B (ja)
WO (1) WO1983004384A1 (ja)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102020213943A1 (de) 2020-11-05 2022-05-05 Volkswagen Aktiengesellschaft Sauggreifvorrichtung zum Ansaugen eines Objekts

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2596313B1 (fr) * 1986-03-28 1989-06-30 Gravograph Systeme de fixation par aspiration d'une plaque a travailler, notamment en gravure
DE3763395D1 (de) * 1986-11-10 1990-08-02 Haas Laser Systems Ag Verfahren zum transportieren von perforierten plattenfoermigen objekten.
GB8815553D0 (en) * 1988-06-30 1988-08-03 Mpl Precision Ltd Vacuum chuck
FR2642055A1 (ja) * 1989-01-20 1990-07-27 Radiotechnique Compelec
DE4000099C2 (de) * 1990-01-04 1993-12-02 Fraunhofer Ges Forschung Vorrichtung zum Aufspannen von Werkstücken mittels Unterdruck
IL103906A (en) * 1992-11-27 1996-05-14 Orbotech Ltd Vacuum holder particularly useful as a vacuum table
FR2920329B1 (fr) * 2007-08-29 2009-12-18 Cirtes Src Etau maintenant une piece par depression comportant un moyen d'obturation deplacable des conduits d'aspiration
DE102013201247B4 (de) 2013-01-25 2018-03-22 J. Schmalz Gmbh Flächensauggreifer
DE102013222377B3 (de) * 2013-11-04 2015-02-19 J. Schmalz Gmbh Sauggreifvorrichtung
CN107702842B (zh) * 2017-09-29 2021-07-02 常州中车汽车零部件有限公司 压板压点检测装置以及压板压点检测机构

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU650776A1 (ru) * 1977-05-25 1979-03-05 Предприятие П/Я Р-6816 Вакуумный стол
US4221356A (en) * 1978-11-09 1980-09-09 Fortune William S Vacuum operated holding fixture
DE3140882A1 (de) * 1980-10-17 1982-05-27 Dai Nippon Insatsu K.K., Tokyo Vorrichtung zum befestigen einer offset-druckplatte oder einer aehnlichen platte in ebenem zustand durch unterdruck

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102020213943A1 (de) 2020-11-05 2022-05-05 Volkswagen Aktiengesellschaft Sauggreifvorrichtung zum Ansaugen eines Objekts
DE102020213943B4 (de) 2020-11-05 2023-09-28 Volkswagen Aktiengesellschaft Sauggreifvorrichtung zum Ansaugen eines Objekts

Also Published As

Publication number Publication date
JPS59501053A (ja) 1984-06-21
DE3371048D1 (en) 1987-05-27
SE8203517L (sv) 1983-12-08
EP0111530A1 (en) 1984-06-27
SE443316B (sv) 1986-02-24
WO1983004384A1 (en) 1983-12-22

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