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WO2001018325A1 - Ensemble plate-forme auto-elevateur entraine par chenilles - Google Patents

Ensemble plate-forme auto-elevateur entraine par chenilles Download PDF

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Publication number
WO2001018325A1
WO2001018325A1 PCT/CA2000/000759 CA0000759W WO0118325A1 WO 2001018325 A1 WO2001018325 A1 WO 2001018325A1 CA 0000759 W CA0000759 W CA 0000759W WO 0118325 A1 WO0118325 A1 WO 0118325A1
Authority
WO
WIPO (PCT)
Prior art keywords
tower
platform
caterpillar
mounted onto
platform assembly
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.)
Ceased
Application number
PCT/CA2000/000759
Other languages
English (en)
Inventor
Jean G. Robillard
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.)
Individual
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 AU56673/00A priority Critical patent/AU5667300A/en
Publication of WO2001018325A1 publication Critical patent/WO2001018325A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G1/00—Scaffolds primarily resting on the ground
    • E04G1/18—Scaffolds primarily resting on the ground adjustable in height
    • E04G1/20—Scaffolds comprising upright members and provision for supporting cross-members or platforms at different positions therealong

Definitions

  • the present invention relates to a scaffolding hereinafter called “platform assembly”, that is designed to be self-standing or to be erected close to a building wall in order to be used by workmen to construct, repair or otherwise work on said wall. More specifically, the invention relates to a platform assembly comprising at least one tower along which a platform may be moved up or down by means of a lifting mechanism incorporating at least one caterpillar belt that is mounted on the platform and operatively engages a rack mounted on the tower.
  • BEST United States patent Nos. 3,323,61 6
  • ST- GERMAIN 4,809,814
  • U.S. patent No. 4,293,054 PIERI
  • a scaffolding comprising two posts along which a working platform called "bridge” may be moved up and down by means of toothed wheels that are driven by an electric motor through a suitable transmission.
  • the toothed wheels are meshed with corresponding gear racks mounted on bars forming part of both posts.
  • U.S. patent No. 4,294,332 (READY) which discloses a scaffold unit comprising a pair of towers, each having a pair of rails held together by cross-ties. Each rail has a gear rack, which extends all over its length on its front face.
  • a self-elevating platform supporting carriage is mounted onto each tower. Each carriage comprises a frame supporting a pair of upright shoes that fit over and guide the carriage on the rails when the carriage is in motion. Each carriage also comprises a shaft that carries a pair of gears, which mesh with the gear racks of the adjacent rails through slots provided in the shoes.
  • a controllable motor is connected to the shaft of each carriage so as to rotate the gears and thus move the carriage and the platform supported by the same up or down along the towers.
  • the object of the present invention is to provide a platform assembly of the above mentioned type, wherein the lifting mechanism incorporates at least one and preferably two symmetrically positioned caterpillar belts mounted onto the platform and each engaging a corresponding rack mounted onto the tower.
  • the platform assembly according to the invention comprises at least one tower made of a plurality of tower sections devised to be connected to each other in end-to-end relationship.
  • the platform also comprises a platform that is slidably mounted onto each tower.
  • the platform comprises an elongated, sleeve-shaped frame surrounding the tower.
  • a lifting mechanism is provided to move the platform up and down long the tower.
  • This lifting mechanism includes plates that are provided with embossed grooves and are connected to at least one side of the tower sections so as to form at least one continuous rack vertically extending on one side of the tower when the same is assembled.
  • the lifting mechanism also includes at least one caterpillar belt that is provided with outwardly projecting teeth and is held onto a pair of spaced away shafts mounted onto the frame of the platform. The shafts extend horizontally one above the other in a direction parallel to the one side of the tower where the rack is located the rack, and they are positioned in such a manner that the outwardly projecting teeth of the caterpillar belt fit into the grooves embossed in the plates forming the rack.
  • the lifting mechanism further comprises driving means that is mounted onto the frame and operatively connected to the caterpillar belt(s) so as to drive the same and thus cause the platform to move up or down along the tower.
  • the caterpillar belt comprises inwardly projecting teeth and the driving means include toothed wheels that are mounted onto one of the shafts on which the caterpillar belt is mounted, so as to engage the inwardly projecting teeth of the belt.
  • the caterpillar belt is caused to make an inwards winding and the driving means include toothed wheels that are mounted onto a driving shaft positioned into the winding so as to engage the outwardly projecting teeth.
  • the caterpillar belt(s) can be made of reinforced rubber or any similar material (belts of this kind are very strong and some of them already used as caterpillar belts in military tanks).
  • the toothed wheels can be made of plastic material.
  • the embossed plates forming the rack(s) can be made of stamped or cast aluminium eventhough they are preferably made of plastic material also.
  • the platform assembly according to the invention can be manufactured at much lower costs than the existing assemblies while having the same strength and efficiency. Its maintenance is also much simpler and less expensive, especially in the case of damages to the rack(s). Moreover, its operation is smooth.
  • use is preferably made of two symmetrically positioned caterpillar belts, which engage corresponding racks positioned on two opposite sides of the tower.
  • the driving shafts of both caterpillar belts are connected to a same driving source to make it sure that they rotate in unison.
  • the driving source consists of hydraulic motors each connected to one of the driving shaft, which are connected to a same hydraulic pump driven by a motor, preferably a diesel motor, or otherwise, a synchronized dual driving source.
  • Figure 1 is a front perspective view of a platform assembly according to a preferred embodiment of the invention
  • Figure 2 is a perspective view of the basic components of the lifting mechanism of the platform assembly shown in Figure 1 ;
  • Figure 3 is a partial, front elevational view of the platform of the assembly shown in the preceding figures, this view showing the frame and the caterpillar belts mounted onto it;
  • Figure 4 is a top plan view of the platform shown in Figure 3;
  • Figure 5 is a side elevational view of the platform shown in Figures 3 and Figure 6 is a side elevational view of a caterpillar belt with no inwardly projecting teeth, said view showing the way such a belt can be driven to achieve the same result as with the belts shown in the preceding figures.
  • the platform assembly 1 comprises at least one tower 3 supporting a platform 23.
  • the platform 23 may be used as an elevator and may thus support a cabin (not shown).
  • the platform 23 of the adjacent towers may be connected by horizontal structural members 23' to form a bridge. Such is well known in this field and needs not be further described.
  • Each tower 3 is made of a plurality of modular tower sections 5 that are stackable on top of each other to achieve the requested tower height.
  • Each tower section 5 is made of a set of vertical tubular rods 7 held together by cross- ties 9.
  • each tower section 5 has a square or rectangular, horizontal cross-section with a pair of opposite sides 11 , 13 that extend perpendicular to the wall "W" close to which the tower 3 is built up.
  • the platform 23 is slidably mounted onto the tower 3.
  • the platform comprises an elongated, sleeve-shaped frame 25 of rectangular, horizontal cross-section surrounding the tower 3. It also comprises a floor 27 and a sub- floor structure 29 integral to the frame.
  • the floor 27 is intended to be used by the workmen and may include a protective fence opposite to the wall W. Alternatively, the floor may be used as a supporting structure for a cabin when the platform 23 is designed to be used as an elevator.
  • the platform 23 is preferably shaped to permanently leave a structural "gap" 24 between the tower 3 and the adjacent wall W. This allows the installation of permanent anchors (not shown) between the tower and wall, as is often required for safety reasons.
  • a lifting mechanism is provided to move the platform 23 up and down along the corresponding 3.
  • This lifting mechanism includes plates 15, 17 that are provided with embossed grooves 19. These plates are rigidly connected to the opposite sides 11 , 13 of the tower sections 5 so as to form a pair of continuous racks vertically extending on both sides 11 , 13 of the tower 3 when the same is erected.
  • the plates can be made of plastic material. However, they are preferably made of a cast or stamped aluminium. Preferably also, they are sized to extend over the full width of the tower 3 as is shown in the drawings and thus to be directly connected to the tubes 7. They each may be 14 inches long and include 4 grooves. The advantage of such a "restricted" size is that it makes it possible to easily remove and replace at low cost every plate that could be damaged during transportation or assembly of the tower sections.
  • the lifting mechanism also includes a pair of caterpillar belts 31 , 33 that is provided with outwardly projecting teeth 35 and are each held by a pair of spaced away shafts 37, 39 mounted onto the upper and lower parts of the frame 25 of the platform.
  • the shafts 37, 39 extend horizontally one above the other in a direction parallel to the opposite side 11 , 13 of the tower 3 where is located the rack, and they are positioned in such a manner that the outwardly projecting teeth 35 of the caterpillar belts fit into the grooves 19 embossed in the adjacent plates 15, 17 forming the racks.
  • the lifting mechanism further comprises driving means that is mounted onto the frame 25 and sub-floor structure 29, and is operatively connected to the caterpillar belts 31 , 33 so as to drive the same and thus causes the platform 23 to be moved up or down along the tower 3.
  • the caterpillar belts 31, 33 comprise inwardly projecting teeth 41 and the driving means include toothed wheels 43 that are mounted onto the lower shafts 39 so as to engage the inwardly projecting teeth 41 of the belts.
  • each caterpillar belt 31 (or 33) is caused to make a "inwards winding" 45 and the driving means include toothed wheels 45 that are mounted onto a driving shaft 47 positioned into the "bottom" of the winding so as to engage the outwardly projecting teeth 35, thereby making the structure of the belt much simpler than the one of the embodiment previously disclosed.
  • the caterpillar belt(s) 31, 33 can be made of reinforced rubber or any similar material (belts of this kind are very strong and some of them already used as caterpillar belts in military tanks).
  • the toothed wheels used to drive the same can be made of plastic material.
  • suitable tensioning means 49 of conventional structure can be connected to at least one 33 of the shafts to make it sure that the caterpillar belts 31 , 33 are kept tight.
  • Rollers 51 may also be provided to make it sure that all the teeth 35 of the caterpillar belts 31 , 33 remain engaged within the corresponding grooves 19 of the rack over the full height of the belts.
  • the driving mans of the caterpillar belts preferably comprises a pair of hydraulic motors 53 each connected to one of the shafts 39. Both motors 53 are connected to one or two hydraulic pump(s) 55 mounted onto the sub-floor structure 29, thereby making it sure that they work in unison at the same speed.
  • the pump 55 is operated by a motor 57, which is preferably a diesel-operated

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Mechanical Engineering (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Conveying And Assembling Of Building Elements In Situ (AREA)
  • Bridges Or Land Bridges (AREA)

Abstract

L'invention concerne un ensemble plate-forme auto-élévateur (1) destiné à être érigé près d'une paroi de bâtiment afin de permettre à des ouvriers de construire, de réparer ou d'effectuer d'autres travaux sur ladite paroi. Cet ensemble plate-forme comporte au moins une tour (3) le long de laquelle on peut faire monter ou descendre une plate-forme (23) au moyen d'un mécanisme élévateur pourvu d'une ou, de préférence, de deux chenilles (31, 33) montées sur la plate-forme (23) afin qu'elles engrènent de manière fonctionnelle une paire de crémaillères correspondantes (15), elles-mêmes montées sur la tour.
PCT/CA2000/000759 1999-09-09 2000-06-22 Ensemble plate-forme auto-elevateur entraine par chenilles Ceased WO2001018325A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU56673/00A AU5667300A (en) 1999-09-09 2000-06-22 Self-raising, caterpillar-driven platform assembly

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CA 2281737 CA2281737A1 (fr) 1999-09-09 1999-09-09 Plate-forme a tour reglable montee sur chenilles
CA2,281,737 1999-09-09

Publications (1)

Publication Number Publication Date
WO2001018325A1 true WO2001018325A1 (fr) 2001-03-15

Family

ID=4164095

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CA2000/000759 Ceased WO2001018325A1 (fr) 1999-09-09 2000-06-22 Ensemble plate-forme auto-elevateur entraine par chenilles

Country Status (3)

Country Link
AU (1) AU5667300A (fr)
CA (1) CA2281737A1 (fr)
WO (1) WO2001018325A1 (fr)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3323616A (en) 1965-10-22 1967-06-06 Frank S Best Mason's scaffold
US3824871A (en) * 1973-02-22 1974-07-23 L Loesch Drive for bunk feeder
US4293054A (en) 1980-05-19 1981-10-06 Piat Impalcature Automatiche S.P.A. Scaffolding for supporting lifting working bridges and platforms
US4294332A (en) 1979-04-13 1981-10-13 Ready Delbert L Scaffold with gear drive
US4809814A (en) 1988-04-01 1989-03-07 St Germain Jean Scaffolding
DE3939762A1 (de) * 1989-12-01 1991-06-06 Boecker Albert Gmbh & Co Kg Bauaufzug fuer den material- und/oder personentransport
DE29607823U1 (de) * 1995-12-06 1996-06-27 Lingen, Paul, 47669 Wachtendonk Hubgerüst

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3323616A (en) 1965-10-22 1967-06-06 Frank S Best Mason's scaffold
US3824871A (en) * 1973-02-22 1974-07-23 L Loesch Drive for bunk feeder
US4294332A (en) 1979-04-13 1981-10-13 Ready Delbert L Scaffold with gear drive
US4293054A (en) 1980-05-19 1981-10-06 Piat Impalcature Automatiche S.P.A. Scaffolding for supporting lifting working bridges and platforms
US4809814A (en) 1988-04-01 1989-03-07 St Germain Jean Scaffolding
DE3939762A1 (de) * 1989-12-01 1991-06-06 Boecker Albert Gmbh & Co Kg Bauaufzug fuer den material- und/oder personentransport
DE29607823U1 (de) * 1995-12-06 1996-06-27 Lingen, Paul, 47669 Wachtendonk Hubgerüst

Also Published As

Publication number Publication date
AU5667300A (en) 2001-04-10
CA2281737A1 (fr) 2001-03-09

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