US3662903A - Carriage for carrying and vertically moving tumblers or frames relative to a treatment or processing line - Google Patents

Carriage for carrying and vertically moving tumblers or frames relative to a treatment or processing line Download PDF

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Publication number
US3662903A
US3662903A US13609A US3662903DA US3662903A US 3662903 A US3662903 A US 3662903A US 13609 A US13609 A US 13609A US 3662903D A US3662903D A US 3662903DA US 3662903 A US3662903 A US 3662903A
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US
United States
Prior art keywords
carriage
sprocket
workpiece
chain
support
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
US13609A
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English (en)
Inventor
Claudio Mazzone
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.)
Olivetti SpA
TIM SpA
Original Assignee
Olivetti SpA
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 Olivetti SpA filed Critical Olivetti SpA
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Publication of US3662903A publication Critical patent/US3662903A/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C13/00—Other constructional features or details
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C2700/00—Cranes
    • B66C2700/01—General aspects of mobile cranes, overhead travelling cranes, gantry cranes, loading bridges, cranes for building ships on slipways, cranes for foundries or cranes for public works
    • B66C2700/012—Trolleys or runways
    • B66C2700/017—Installations characterised by their destination or by the load-engaging element for as far as the trolley is essential

Definitions

  • Lines for electroplating operations and many other types of processing and treatment lines include a plurality of tanks disposed side by side and sequentially along the line. In each of these tanks at least one state of the processing is carried out and accordingly the pieces to be treated, carried in tublers or supported on frames, must be clipped for a predetermined time into each tank.
  • a carriage which is movable along the processing line. The carriage is provided with means for lowering and lifting the workpieces with respect to the tanks as well as with means for rotating the workpieces inside the tanks during the treatment which takes place within the tanks.
  • the means for rotating the workpiece inside the tanks usually include a reduction gear driven by an electric motor and a suitable drive-transmission connecting the reduction gear with the workpiece.
  • the known carriages of the kind described above suffer from some drawbacks.
  • the lifting and lowering mechanism is separate and distinct from the means for rotating the workpiece. This results in a complex structure, requiring two separate motors to accomplish the three required movements. The two motors are actuated independently of one another and therefore a complex control system is required. This disadvantage becomes more serious when a fully automatic treatment cycle is desired.
  • the present invention is directed to a carriage which overcomes disadvantages enumerated above.
  • the present invention is directed to a carriage for carrying the workpiece along the processing line which includes a plurality of drums for lifting and lowering the workpieces into and out of the drums.
  • the carriage includes at least one endless chain which engages a driving pinion actuated by a motor capable of rotating in both directions.
  • the motor actuates a first gear wheel mounted on the carriage through a mechanism which permits rotation in only one direction.
  • the motor also actuates a second gear wheel which is free to rotate in both directions and which is secured to a support.
  • the positions of the axes of the driving pinion of the motor and the first gear wheel are such that the section of chain between them drops into a loop when the motor rotates in the sense in which the first gear wheel will not rotate.
  • the position of the axis of the second gear wheel is such that the gear wheel is lifted, with the support means, as the loop is formed.
  • the carriage 1 includes two side plates 3,3, which are connected by rigid cross members to form a unitary structure.
  • An electric drive motor 4 is housed within the carriage and rotates an upper shaft 5, which is rotatably mounted in the plates 3,3.
  • Shaft 5 can be connected to motor 4 by use of a chain or gear train, as is well known.
  • a chain gear wheel or driving pinion 6 and 6 is mounted on each end of the shaft 5 on each of the side plates 3,3 and in the same vertical plane as the wheels 6 and 6'.
  • the chain gear 7 and 7' are connected to the carriage by means of an overriding clutch or freewheel not shown.
  • the clutch permits rotation of gear 7 and 7 in only one direction. Clutches of this type are known in the art and accordingly need not be shown in detail.
  • Transmission chain gears 8 and 8' are rotatably mounted relative to the carriage.
  • carriage 1 The two sides of carriage 1 are identical and accordingly the description hereinafter is directed to the portion indicated by the section line II--II.
  • the set of gear wheels 6, 7, 8 is in engagement with an endless chain 9 which runs on the wheels as shown in dash and dot lines in FIG. 2.
  • the chain 9 passes around a gear wheel 10 located near the bottom of the carriage.
  • Gear wheel 10 is fixed to the end of a horizontal lower shaft 11. As seen in FIG. I, there are two such gears 10 and 10' supported on shaft 11.
  • the diameters of thegear wheels and the positions of the centers of the gear wheels 6, 7 and 8 are chosen to enable the chain 9 to form two horizontal chain sections, or runs.
  • the rotational movement permitted by the clutch is in a direction which permits the chain 9 to move from the wheel 7 towards the wheel 6.
  • the carriage includes a tumbler 17 into which the workpiece can be placed.
  • the support for the tumbler 17 includes shaft 11, two chain gear wheels 15, 15' which are fixed on the shaft 11, two chain gear wheels 16, 16' which are integral with the tumbler 17, and two chains 18, 18' which are engaged with gear wheels 16,16, 15 and 15. lt
  • the support means for the frame 21 includes the shaft 11, two cams 19, 19' (FIG. 3) fastened to the ends of said shaft 11, and a yoke 20 for supporting the frame wl which is used to support the workpiece.
  • the yoke 20 includes two plates 22,22 connected by means of one or more cross members 23, upon which the frame 21 can rest.
  • Each of the plates 22,22 is provided with a roller, 24 and 24' respectively.
  • the rollers 24 and 24 act against the cams 19 and 19'.
  • the plates 22 and 22 also act against the rollers, 25 and 25 respectively.
  • the axes of the rollers of each pair lie in the same vertical plane and each pair of rollers is adapted to slide inside the vertical guide ways 26 and 26' provided in the side plates 3 and 3' of the carriage.
  • the operation of the carriage is best understood by assuming first that the carriage is equipped to carry a tumbler 17 into which the workpiece to be treated is inserted. To this end, the tumbler 17 is simply supported on the shaft 11 by means of the chains 18 and 18, which are in engagement with the gear wheels 15, 15 and 16,16 respectively.
  • the yoke 20, which is shown in its lower position relative to the carriage in FIGS. 1 and 2 is lifted to the top of the carriage by sliding the rollers 25, 25' inside the ways 26, 26'. The yoke is then locked in the raised position by well known means, not shown.
  • FIG. 4 diagrammatically shows the position taken by the various parts of the carriage in this first stage of the cycle. This position is the lowered position in which the rotating tumbler 17 remains in one of the processing drums for a predetermined time.
  • the lowering movement of the tumbler 17 is accomplished by reversing the direction of rotation of the motor 4.
  • the chain portion 1 which previously gathered as a loop in the recess 27, feeds to the left hand side of wheel 6 and the shaft 11 is lowered as diagrammatically shown in FIG. 6.
  • the carriage and frames 21 are now ready for a processing cycle.
  • the cycle includes the steps of treatment in the bath drum and of raising and lowering the frames from the drum.
  • the frames are reciprocated vertically by the action of the cams 19,19 cooperating with the rollers 24,24.
  • Such reciprocating movement greatly improves the results obtainable from electroplating operation.
  • the invention is therefore seen to be directed to a carriage capable of raising and lowering a workpiece and which is also capable of rotating the workpiece during the period of treatment in the drum. Because these three movements are accomplished by means of a single motor the inventive carriage lends itself to fully automatic operation. Also, because a single motor is required, the control circuit for automatic operation is simple as compared to those required for the prior art systems.
  • a carriage for moving workpieces of any configuration along a processing line and having a workpiece carrying means which is raised and lowered at stations along said line and is capable of rotating said workpiece if desired comprising:
  • control member mounted for rotation in one direction with respect to said carriage; an idler member mounted for rotation in two directions with respect to said carriage;
  • said linking member is an endless chain which determines the lowest position of said supporting member and said oscillations occur at said lowest position;
  • said supporting member is drum having at least one gear inclined with respect to the axis of said drum and engaging said chain.
  • a first sprocket mounted on said carriage and engaging said support chain at a point in a vertical plane spaced horizontially from said driving sprocket
  • said support includes at least one support mechanism attached to said second sprocket and bearing the weight of said workpiece.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Electroplating Methods And Accessories (AREA)
  • Specific Conveyance Elements (AREA)
US13609A 1969-02-26 1970-02-24 Carriage for carrying and vertically moving tumblers or frames relative to a treatment or processing line Expired - Lifetime US3662903A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT5073369 1969-02-26

Publications (1)

Publication Number Publication Date
US3662903A true US3662903A (en) 1972-05-16

Family

ID=11273601

Family Applications (1)

Application Number Title Priority Date Filing Date
US13609A Expired - Lifetime US3662903A (en) 1969-02-26 1970-02-24 Carriage for carrying and vertically moving tumblers or frames relative to a treatment or processing line

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US (1) US3662903A (enrdf_load_stackoverflow)
DE (1) DE2009131A1 (enrdf_load_stackoverflow)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6007125A (en) * 1998-03-23 1999-12-28 Topal Industries S.A. Device for turning over heavy and/or bulky loads

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1213981B (it) * 1987-08-26 1990-01-05 Coopmes Soc Coop Arl Attrezzatura che consente l'integrazione manuale o automatizzata fra gestione magazzino e programmadi lavoro di una linea di lavorazione,particolarmente per linea di sezionatura lastre di vetro

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US568174A (en) * 1896-09-22 Crane
US896781A (en) * 1907-06-01 1908-08-25 William R Webster Mechanism for receiving or delivering tubes.
US1272150A (en) * 1915-06-10 1918-07-09 William F Thornton Unloading apparatus.
US2450718A (en) * 1942-08-20 1948-10-05 Master Electric Co Hoist

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US568174A (en) * 1896-09-22 Crane
US896781A (en) * 1907-06-01 1908-08-25 William R Webster Mechanism for receiving or delivering tubes.
US1272150A (en) * 1915-06-10 1918-07-09 William F Thornton Unloading apparatus.
US2450718A (en) * 1942-08-20 1948-10-05 Master Electric Co Hoist

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6007125A (en) * 1998-03-23 1999-12-28 Topal Industries S.A. Device for turning over heavy and/or bulky loads

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Publication number Publication date
DE2009131A1 (enrdf_load_stackoverflow) 1970-10-01

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