EP2995388B1 - Ein absaugungsarm - Google Patents

Ein absaugungsarm Download PDF

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Publication number
EP2995388B1
EP2995388B1 EP15184484.2A EP15184484A EP2995388B1 EP 2995388 B1 EP2995388 B1 EP 2995388B1 EP 15184484 A EP15184484 A EP 15184484A EP 2995388 B1 EP2995388 B1 EP 2995388B1
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EP
European Patent Office
Prior art keywords
tube
arm
joint
gas spring
adjustment means
Prior art date
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Application number
EP15184484.2A
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English (en)
French (fr)
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EP2995388A1 (de
Inventor
Andrea Silverio CANGIANO
Paolo MENOZZI
Giuseppe Virga
Luca Giannini
Claudio Coral
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Filcar SpA
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Filcar SpA
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B15/00—Preventing escape of dirt or fumes from the area where they are produced; Collecting or removing dirt or fumes from that area
    • B08B15/002—Preventing escape of dirt or fumes from the area where they are produced; Collecting or removing dirt or fumes from that area using a central suction system, e.g. for collecting exhaust gases in workshops
    • B08B15/005—Preventing escape of dirt or fumes from the area where they are produced; Collecting or removing dirt or fumes from that area using a central suction system, e.g. for collecting exhaust gases in workshops comprising a stationary main duct with one or more branch units, the branch units being freely movable along a sealed longitudinal slit in the main duct

Definitions

  • the invention relates to a telescopic extraction arm which is particularly, (but not exclusively), destined for installation works in mechanical workshops, and predisposed for the extraction of fumes produced by motor vehicles' exhaust gases; the invention is also applicable to the field of welding fumes extraction and generally to the extraction of gaseous pollutants or harmful substances.
  • a commonly used exhaust gas extraction plant installed in a workshop provides extraction arms extending from a same conduit - or duct - which duct runs along the workshop ceiling and is connected to a corresponding pneumatic vacuum source.
  • the arms of the known type exhibit a first tube extending downwards, which tube is carried by a carriage sliding along a rail formed on the duct, and a second tube coupled to the lower end of the first tube via a joint, so as to arrange a suction nozzle, (applied to a free end of the second tube), or other end element, in the desired extraction position.
  • the suction nozzle, or other end element can be in turn movable relative to the second tube through a respective joint.
  • the arm may comprise a greater number of tubes, which are however connected one to another by means of respective swivel joints (elbows).
  • the suction nozzle, or other end element when in use must remain stationary in a position opposite the gas source to be extracted, i.e. in front of the exhaust pipe of the car or relative to the welding equipment, and so on. So, tilting of the second arm (or of the arm sections located downstream of the first portion), should occur in an adjustable manner in order for it to remain in the desired position.
  • the adjustment of the discrete type sets limits within the range of obtainable angular positions, wherein achievement of different configurations not provided by the kinematic coupling of the toothed wheels, is not possible.
  • suction arm is described in document US6524180 .
  • the various segments are kept in position by means of springs and counterweights. Any means are provided for blocking the arm segments in a desired angular position.
  • a technical task of the present invention is to provide an extraction arm which is able to overcome the drawbacks of the prior art mentioned above.
  • a further object of the invention is to provide a extraction arm with excellent maneuverability and handling.
  • a further aim of the invention is to provide an extraction arm not requiring frequent adjustment and maintenance works.
  • the arm 1 comprises a first tube 2, a first (upper) end 2a of which is connected to movement means, particularly a carriage 3 which is slidable on preferably horizontal guide 4, which movement means enable a translational movement of the arm 1 along the guide 4.
  • the guide 4 is formed externally, on an extraction duct 5, which extraction duct 5 is connected to a pneumatic vacuum source (not shown), which source may support a plurality of extraction arms of the type described herein, within an extraction plant.
  • a pneumatic vacuum source not shown
  • the extraction duct 5 is for example fixed to the ceiling, wherein it takes on a stiff configuration.
  • the first tube 2 Due to the connection to the extraction duct 5 via fluid communication, also the first tube 2 becomes a seat for pneumatic suction internally thereof.
  • the first tube 2 exhibits a telescopic structure which is defined by an upper outer sleeve 6, and a lower inner sleeve 7, whose upper part is inserted inside the upper sleeve 6, thus protruding therefrom according to the configuration ("extension degree") assumed by the arm.
  • the first tube may exhibit a non-telescopic structure as well as different configurations.
  • a second tube 8 is rotatingly connected by means of a first joint 9, which is configured at least to allow rotation of the second tube 8 relative to the first tube 2 about an axis.
  • a suction nozzle 10 is applied to the end of the second tube 8 opposite the first tube 2, by means of a second joint 11, which second joint 11 is configured at least for allowing rotation about an axis of the suction nozzle 10 relative to the second tube 8.
  • the arm 1 generally comprises suitable flexible tubular fittings (also of the known type), which are located relative to aforementioned joints.
  • a third tube applied thereto, which in turn supports the suction nozzle by means of a third joint.
  • This solution assumes a two-joints or "elbows" arm configuration, (plus a third one for the suction nozzle), which arm is suitable for being used as a welding fumes extraction arm.
  • Adjustment means 12 are advantageously interposed between the first and second tube 2, 8.
  • said adjustment means 12 comprises at least one gas spring 13 of the lockable type which is intended to generate a thrust action onto the second tube 8, which thrust action occurs according to the lifting orientation of said second tube 8.
  • Each spring 13 extends between a hinge 14 connected to the first joint, and an anchoring ring 15 which is fixed to the outer surface of the second tube 8.
  • the cylinder 13a of the spring 13 is connected to the joint 9, whereas the stem 13b is connected to the second tube 8, however, in different embodiments said assembly may be reversed.
  • the springs 13 should be preferably mounted relative to the corresponding joint in such a way that, during actuation of the arm, they are able to balance the weight force acting on the suspended part of the arm 1 itself (i.e. downstream of the joint, relative to the gravity direction).
  • thrust springs 13 shall be mounted below the ideal axis of the joint, whereon they act (as shown in Figures 1 and 2 ).
  • hinge 14 connecting the springs 13 shall be in practice placed in the outer corner defined by the joint.
  • a traction spring 13 shall be arranged above the joint (i.e. above the axis thereof), as shown in Figure 3 , and act relative to the inner angle formed therebetween.
  • the adjustment means 12 further comprises a locking and unlocking mechanism (not shown) of the gas spring 13, configured for adjusting the locking position of the spring 13 in a continuous manner, between a maximum stroke position and a minimum stroke position.
  • the locking mechanism can be manually actuated through a respective lever via a wire connection, in order to activate locking and unlocking of the spring 13.
  • the locking mechanism includes a lock and unlock button of the spring 13.
  • the arm 1 further comprises second adjustment means acting between the second and third tube.
  • Said second adjustment means comprises at least one gas spring of the lockable type (for example, similar to those described above), which gas spring is operationally active between the second and third tube, thus generating a thrust action on the third tube occurring in the lifting direction of the latter.
  • This locking and unlocking mechanism is further in turn configured for adjusting the locking position of the spring in a continuous manner, between a maximum stroke position and a minimum stroke position.
  • the locking mechanism may comprise a lock-unlock button of the respective spring, or a respective lever acting by means of a wire connection.
  • such a condition may provide a single lever associated with both locking mechanisms and having a stroke, wherein a first portion thereof is concerned with the locking mechanism of the first adjustment means, while a second portion thereof, preferably adjacent to the first portion, is concerned with the locking mechanism of the second adjustment means.
  • gas spring active between the second and the third tube, can be arranged at the second joint according to same arrangements as described above in relation to the spring 13, which spring 13 is active relative to said first joint, i.e. between the first and second tube 2,8.
  • the present invention attains the set aims, thus overcoming the drawbacks of the prior art.
  • Adjustment of the arm positioning is further facilitated owing to the recall/ thrust action exerted by the spring, with considerable benefits in terms of maneuverability of the arm.
  • gas springs do not require any particular maintenance, nor do they need any end adjustment (unlike the friction means of the prior art), thus resulting to be extremely practical as well as cost-effective.

Landscapes

  • Joints Allowing Movement (AREA)

Claims (9)

  1. Absaugarm, umfassend:
    - ein erstes Rohr (2), das oben mit Verbindungsmitteln zur Verbindung mit einer pneumatischen Vakuumquelle versehen ist;
    - ein zweites Rohr (8), das mit einem unteren Ende (2b) des ersten Rohrs (2) mittels eines ersten Gelenks (9) verbunden ist, das mindestens so konfiguriert ist, dass eine Drehung des zweiten Rohrs (8) relativ zum ersten Rohr (2) ermöglicht wird;
    - eine Saugdüse (10), die an einem freien Ende des Arms (1) angeordnet ist;
    - Einstellmittel (12), die zwischen dem ersten und dem zweiten Rohr (2, 8) wirken;
    dadurch gekennzeichnet, dass die Einstellmittel (12) mindestens eine Gasfeder (13) vom verriegelbaren Typ, die zwischen dem ersten und dem zweiten Rohr (2, 8) betriebswirksam ist, und einen Mechanismus zum Verriegeln und Entriegeln der Gasfeder (13) umfasst, konfiguriert zum stufenlosen Einstellen der Verriegelungsposition der Feder (13) zwischen einer maximalen Hubposition und einer minimalen Hubposition.
  2. Arm nach Anspruch 1, wobei die Einstellmittel zwischen dem ersten und dem zweiten Rohr (2, 8) eine Gasfeder (13) umfassen, die in einer im Wesentlichen zentralen Position an dem Gelenk (9) angeordnet ist.
  3. Arm nach Anspruch 1, wobei die Einstellmittel zwischen dem ersten und dem zweiten Rohr (2, 8) mindestens eine Gasfeder (13), die seitlich relativ zu dem ersten Gelenk (9) angeordnet ist, vorzugsweise ein Paar Gasfedern (13) symmetrisch an gegenüberliegenden Seiten des ersten Gelenks (9) angeordnet sind, umfasst.
  4. Arm nach einem der vorhergehenden Ansprüche, wobei die mindestens eine Gasfeder (13) eine Erweiterungsfeder ist.
  5. Arm nach einem der vorhergehenden Ansprüche, wobei die mindestens eine Gasfeder (13) eine Druckfeder ist.
  6. Arm nach einem der vorhergehenden Ansprüche, wobei der Arm (1) zudem ein drittes Rohr aufweist, das mit einem Ende des zweiten Rohrs (8) gegenüber dem ersten Rohr mittels eines zweiten Gelenks verbunden ist, das mindestens so konfiguriert ist, dass eine Drehung des dritten Rohrs relativ zum zweiten Rohr (8) ermöglicht wird, und wobei der Arm (1) zudem zweite Einstellmittel umfasst, die zwischen dem zweiten (8) und dem dritten Rohr wirken, wobei die zweiten Einstellmittel mindestens eine Gasfeder vom verriegelbaren Typ umfassen, die zwischen dem zweiten und dem dritten Rohr betriebswirksam ist und einen Mechanismus zum Verriegeln und Entriegeln der Gasfeder, konfiguriert zum stufenlosen Einstellen der Verriegelungsposition der Feder zwischen einer maximalen Hubposition und einer minimalen Hubposition.
  7. Arm nach dem vorhergehenden Anspruch, wobei die zwei Verriegelungsmechanismen der zwei Einstellmittel mit einem gleichen Betätigungshebel verbunden sind, wobei der Betätigungshebel einen Hub aufweist, wobei ein erster Abschnitt davon den Verriegelungsmechanismus der ersten Einstellmittel betrifft, während ein zweiter Abschnitt davon, vorzugsweise benachbart zu dem ersten Abschnitt, den Verriegelungsmechanismus der zweiten Einstellmittel betrifft.
  8. Arm nach Anspruch 6 oder Anspruch 7, wobei die zuvor genannte Gasfeder zwischen dem zweiten und dem dritten Rohr in einer im Wesentlichen zentralen Position an dem Gelenk angeordnet ist.
  9. Arm nach mindestens einem der Ansprüche 6 - 8, wobei eine Gasfeder zwischen dem zweiten und dem dritten Rohr in einer seitlichen Position relativ zu dem zweiten Gelenk angeordnet ist, vorzugsweise ein Paar Gasfeder, die an gegenüberliegenden Seiten des zweiten Gelenks angeordnet sind.
EP15184484.2A 2014-09-12 2015-09-09 Ein absaugungsarm Active EP2995388B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ITMO20140254 2014-09-12

Publications (2)

Publication Number Publication Date
EP2995388A1 EP2995388A1 (de) 2016-03-16
EP2995388B1 true EP2995388B1 (de) 2019-12-04

Family

ID=51871193

Family Applications (1)

Application Number Title Priority Date Filing Date
EP15184484.2A Active EP2995388B1 (de) 2014-09-12 2015-09-09 Ein absaugungsarm

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EP (1) EP2995388B1 (de)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE542019C2 (en) 2018-06-08 2020-02-11 Fumex Ab Support arm arrangement for a local gas extractor, and a local gas extractor with such a support arm arrangement

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6524180B1 (en) * 2002-02-19 2003-02-25 Maury Simms Adjustable duct assembly for fume and dust removal
EP2144718A4 (de) * 2007-05-11 2014-04-30 Fumex Ab Befestigungsvorrichtung, verbindungskonstruktion, lüftungsarm, lüftungssystem

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

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EP2995388A1 (de) 2016-03-16

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