EP2995388B1 - Un bras d'aspiration - Google Patents

Un bras d'aspiration 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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German (de)
English (en)
Other versions
EP2995388A1 (fr
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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Publication of EP2995388A1 publication Critical patent/EP2995388A1/fr
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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. Bras d'extraction, comprenant :
    - un premier tube (2) pourvu au sommet de moyens de raccordement pour se raccorder à une source de vide pneumatique ;
    - un second tube (8) raccordé à une extrémité inférieure (2b) du premier tube (2) au moyen d'un premier joint (9) configuré au moins pour permettre une rotation du second tube (8) par rapport au premier tube (2) ;
    - une buse d'aspiration (10) disposée en correspondance d'une extrémité libre dudit bras (1) ;
    - des moyens de réglage (12) agissant entre le premier et le second tube (2, 8);
    caractérisé en ce que lesdits moyens de réglage (12) comprennent au moins un ressort à gaz (13) du type pouvant se bloquer, fonctionnellement actif entre le premier et le second tube (2, 8), et un mécanisme, pour bloquer et débloquer le ressort à gaz (13), configuré pour régler la position de blocage du ressort (13) d'une façon continue entre une position de course maximum et une position de course minimum.
  2. Bras selon la revendication 1, dans lequel lesdits moyens de réglage comprennent, entre lesdits premier et second tubes (2, 8), un ressort à gaz (13) disposé dans une position substantiellement centrale sur ledit joint (9).
  3. Bras selon la revendication 1, dans lequel lesdits moyens de réglage comprennent, entre lesdits premier et second tubes (2, 8), au moins un ressort à gaz (13) disposé latéralement par rapport au dit premier joint (9), de préférence une paire de ressorts à gaz (13) disposés symétriquement sur des côtés opposés dudit premier joint (9).
  4. Bras selon l'une quelconque des revendications précédentes, dans lequel ledit au moins un ressort à gaz (13) est un ressort à traction.
  5. Bras selon l'une quelconque des revendications précédentes, dans lequel ledit au moins un ressort à gaz (13) est un ressort à compression.
  6. Bras selon l'une quelconque des revendications précédentes, dans lequel ledit bras (1) comporte de plus un troisième tube raccordé à une extrémité du second tube (8) opposé au premier tube au moyen du second joint configuré au moins pour permettre une rotation du troisième tube par rapport au second tube (8), et dans lequel ledit bras (1) comprend de plus des seconds moyens de réglage agissant entre le second (8) et le troisième tube, lesdits seconds moyens de réglage comprenant au moins un ressort à gaz du type pouvant se bloquer, fonctionnellement actif entre le second et le troisième tube, et un mécanisme pour bloquer et débloquer le ressort à gaz, configuré pour régler la position de blocage du ressort d'une façon continue entre une position de course maximum et une position de course minimum.
  7. Bras selon la revendication précédente, dans lequel les deux mécanismes de blocage des deux moyens de réglage sont raccordés à un même levier d'actionnement, ledit levier d'actionnement comportant une course dans laquelle sa première partie concerne le mécanisme de blocage des premiers moyens de réglage, tandis que sa seconde partie, de préférence adjacente à la première partie, concerne le mécanisme de blocage des seconds moyens de réglage.
  8. Bras selon la revendication 6 ou la revendication 7, dans lequel le susdit ressort à gaz est disposé entre lesdits second et troisième tubes dans une position substantiellement centrale sur ledit joint.
  9. Bras selon au moins l'une des revendications 6 - 8, dans lequel un ressort à gaz est disposé entre lesdits second et troisième tubes dans une position latérale par rapport au dit second joint, de préférence une paire de ressorts à gaz disposés sur des côtés opposés dudit second joint.
EP15184484.2A 2014-09-12 2015-09-09 Un bras d'aspiration Active EP2995388B1 (fr)

Applications Claiming Priority (1)

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

Publications (2)

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

Family

ID=51871193

Family Applications (1)

Application Number Title Priority Date Filing Date
EP15184484.2A Active EP2995388B1 (fr) 2014-09-12 2015-09-09 Un bras d'aspiration

Country Status (1)

Country Link
EP (1) EP2995388B1 (fr)

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 (fr) * 2007-05-11 2014-04-30 Fumex Ab Dispositif de montage, structure de joint, bras de ventilation, système de ventilation

Non-Patent Citations (1)

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

Also Published As

Publication number Publication date
EP2995388A1 (fr) 2016-03-16

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