US3754633A - Gantry scraper - Google Patents

Gantry scraper Download PDF

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Publication number
US3754633A
US3754633A US00129770A US3754633DA US3754633A US 3754633 A US3754633 A US 3754633A US 00129770 A US00129770 A US 00129770A US 3754633D A US3754633D A US 3754633DA US 3754633 A US3754633 A US 3754633A
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US
United States
Prior art keywords
scraper
gantry
jib
link
pivotally connecting
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
US00129770A
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English (en)
Inventor
R Bluntzer
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.)
AMECO
Original Assignee
AMECO
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Filing date
Publication date
Application filed by AMECO filed Critical AMECO
Application granted granted Critical
Publication of US3754633A publication Critical patent/US3754633A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
    • B65G65/00—Loading or unloading
    • B65G65/02—Loading or unloading machines comprising essentially a conveyor for moving the loads associated with a device for picking-up the loads
    • B65G65/06—Loading or unloading machines comprising essentially a conveyor for moving the loads associated with a device for picking-up the loads with endless scraping or elevating pick-up conveyors

Definitions

  • the present invention relates to gantry scrapers.
  • gantry scrapers comprise two scraping arms, namely a primary arm and a secondary arm.
  • the primary arm carries along the stored products or materials towards transfer means such as endless belt conveyors or the like.
  • the secondary arm is adapted to drive the products or materials towards the primary arm.
  • the primary arm rotates about a pivot consisting of the lower driving shaft.
  • the secondary arm of which the upper head or end is connected through any suitable means to the upper head or end of the primary arm, is adapted to slide downwards along a rectilinear path.
  • the gantry comprises an inclined guideway in which a roller connected through a rod to the lower end of the secondary arm is adapted to travel.
  • the space left between heap and gantry is very small, thus limiting the guideway inclination as well as the rod length. Therefore, the distance from the lowermost point of the secondary am in the end position and the gantry is relatively short and limits the height available for storing the products or materials.
  • the storage heap or hook is increased by either providing a pit into which said secondary arm can be lowered, or raising the gantry on the side of the secondary arm, thus increasing the volume available for the storage of the loose products or materials.
  • the present invention is concerned chiefly with a device adapted to impart a relative mobility to the secondary arm of a gantry scraper, characterized in that it comprises penduIar-motion means for placing said secondary arm in co-extensive relationship to said primary arm, said means being combined with vertical-motion means for lowering said secondary arm into the pit of the silo or like storage means during a second step.
  • FIG. 1 is a diagrammatic elevational view showing a gantry scraper comprising the arrangement of this invention.
  • FIG. 2 is a view similar to FIG. 1 showing a modified form of embodiment of the device of this invention.
  • the gantry scraper 1 adapted to travel in a silo 2 in a direction perpendicular to the plane of the Figure comprises a gantry structure 3 having the shape of an inverted V and bearing with its lower ends 4 and 5 on rails 6 and 7, respectively.
  • This gantry structure 3 constitutes the support of a pair of scraper arms 8, 9, with arm 8 constituting the primary arm and arm 9 the secondary arm.
  • Each arm 8, 9 comprises in a manner known per so an endless scraping chain 8a, 9a carrying the scraping tools; these chains being driven from suitable and known power means (not shown).
  • the head 10 at the upper end of primary arm 8 is connected through a pivoted rod 11 to the head 12 of the secondary arm 9, which is also located at the upper end of this arm.
  • the lower shaft 13 of secondary arm 9 is connected via hinge means to a first link 14 connected in turn to a second link 15.
  • a hinge pin 16 permits the mutual pivotal connection of links 14 and 15.
  • the lower end of second link is connected through a fixed pivot pin 18 to the gantry structure 3.
  • the storage silo or like enclosure may comprise a pit-forming bottom 19 or alternatively the rail 7 may be disposed at a higher level, for instance on a wall 20, a shown in FIG. I.
  • This wall 20 permits to raise the level of the lower limit 21 of the heap or pile of product 22 to a higher level 23.
  • the storage volume is increased by the quantity illustrated by the hatched portion 24 of FIG. I.
  • the primary and secondary arms 8, 9 are lowered down to a substantially horizontal position in which they are substantially aligned on the bottom 19 of silo 2, as shown in dotted lines in FIG. 1.
  • Hoisting means, such as babies 8b and 9b are provided for lifting the two arms, respectively.
  • a pendular motion is imparted to the secondary arm 9 and then the assembly comprising this secondary arm 9 and the primary arm 8 is lowered in a substantially vertical direction.
  • the device comprises a winch 25 mounted to the gantry structure3 and a. cable 26 interconnecting said winch and said secondary arm 9.
  • the cable 26 is wound on a return pulley 27 carried by the gantry structure at a lower level than said winch 25.
  • the cable 26 supporting the end of the secondary arm describes a circular arc centered to the axis of said return pulley 27.
  • the winch and cable system is replaced either by a telescopic tube or by a cylinder-and-piston actuator; in this case, the telescopic tube or actuator pivots about the hinge pin 27 and becomes operative only when the arms 8 and 9 are in position 28.
  • a gantry scraper for loading bulk material from a storage heap; a gantry; a scraper loader for loading bulk material from a storage heap of said material comprising a first scraper jib having first scraper means thereon for scraping said material from said storage heap to a loading position, and a second scraper jib having second scraper means thereon for scraping said material on said storage heap and feeding said first scraper means with said material, said first scraper jib and said second scraper jib each having a longitudinal axis and said second scraper jib having a longitudinal length less than said first scraper jib; means pivotally connecting a lower end of said first scraper jib to said gantry at an elevation above the elevation of the bottom of said storage heap; means pivotally connecting said second scraper jib to said first scraper jib; and a link mechanism having means means for effecting pivotal movement of said second scraper jib and said first scraper jib to
  • a gantry scraper according to claim 1 wherein said means pivotally connecting said second link at said second point to said gantry comprises means defining said second point at an elevation higher than the elevation of said means pivotally connecting said first scraper jib to said gantry.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Filling Or Emptying Of Bunkers, Hoppers, And Tanks (AREA)
US00129770A 1970-03-31 1971-03-31 Gantry scraper Expired - Lifetime US3754633A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7011804A FR2081311B1 (show.php) 1970-03-31 1970-03-31

Publications (1)

Publication Number Publication Date
US3754633A true US3754633A (en) 1973-08-28

Family

ID=9053260

Family Applications (1)

Application Number Title Priority Date Filing Date
US00129770A Expired - Lifetime US3754633A (en) 1970-03-31 1971-03-31 Gantry scraper

Country Status (2)

Country Link
US (1) US3754633A (show.php)
FR (1) FR2081311B1 (show.php)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE501083C2 (sv) * 1993-03-25 1994-11-07 Volvo Ab Förfarande för åstadkommande av ett limförband i ett falsförband

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE633005A (show.php) *
GB1148425A (en) * 1967-08-12 1969-04-10 Schade Maschf Gustav Apparatus for unloading material from a heap
US3509985A (en) * 1967-03-25 1970-05-05 Schade Maschf Gustav Conveyor loading and unloading apparatus
US3621977A (en) * 1968-10-19 1971-11-23 Schade Maschf Gustav Material-removing scraper with an articulated boom

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE633005A (show.php) *
US3509985A (en) * 1967-03-25 1970-05-05 Schade Maschf Gustav Conveyor loading and unloading apparatus
GB1148425A (en) * 1967-08-12 1969-04-10 Schade Maschf Gustav Apparatus for unloading material from a heap
US3621977A (en) * 1968-10-19 1971-11-23 Schade Maschf Gustav Material-removing scraper with an articulated boom

Also Published As

Publication number Publication date
FR2081311B1 (show.php) 1973-11-16
FR2081311A1 (show.php) 1971-12-03

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