US3632075A - Dismantling keybolt for a propping-up and supporting framework - Google Patents

Dismantling keybolt for a propping-up and supporting framework Download PDF

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Publication number
US3632075A
US3632075A US12397A US3632075DA US3632075A US 3632075 A US3632075 A US 3632075A US 12397 A US12397 A US 12397A US 3632075D A US3632075D A US 3632075DA US 3632075 A US3632075 A US 3632075A
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US
United States
Prior art keywords
leg
arms
keybolt
bracket
framework
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
US12397A
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English (en)
Inventor
Enrique Munoz
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.)
ENTREPRISES DEVARS NAUDO AND CIE
Original Assignee
ENTREPRISES DEVARS NAUDO AND CIE
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
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Publication of US3632075A publication Critical patent/US3632075A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • E04G25/00—Shores or struts; Chocks
    • E04G25/04—Shores or struts; Chocks telescopic
    • E04G25/06—Shores or struts; Chocks telescopic with parts held together by positive means
    • 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
    • E04G25/00—Shores or struts; Chocks
    • E04G25/04—Shores or struts; Chocks telescopic
    • E04G25/06—Shores or struts; Chocks telescopic with parts held together by positive means
    • E04G25/061—Shores or struts; Chocks telescopic with parts held together by positive means by pins
    • 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
    • E04G25/00—Shores or struts; Chocks
    • E04G25/04—Shores or struts; Chocks telescopic
    • E04G25/06—Shores or struts; Chocks telescopic with parts held together by positive means
    • E04G25/061—Shores or struts; Chocks telescopic with parts held together by positive means by pins
    • E04G25/063—Shores or struts; Chocks telescopic with parts held together by positive means by pins with safety devices to avoid the accidental loss or unlocking of the pin, e.g. chains attaching the pin to the prop
    • 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
    • E04G25/00—Shores or struts; Chocks
    • E04G25/04—Shores or struts; Chocks telescopic
    • E04G25/06—Shores or struts; Chocks telescopic with parts held together by positive means
    • E04G25/068—Shores or struts; Chocks telescopic with parts held together by positive means by a cam

Definitions

  • the frameworks are raised, for instance, by means of telescopic legs, up to an approximate height, then the screwjacks are regulated for suitably adjusting the position of the form.
  • the present invention overcomes these various disadvantages by creating a keybolt enabling the height of a framework to be sufiiciently reduced by a simple and speedy operation carried out within easy human reach.
  • the keybolt slipped transversally between a lower clamp of the vertical upright of a framework and a transversal pin engaged in an axially adjustable manner in a telescopic leg slidably mounted inside said upright, is formed by a U-shaped stirrup-piece comprising a semicylindrical core connecting two rigid parallel arms or wings each comprising a horizontal rectilinear edge cooperating with said clamp and a sloping edge converging towards said rectilinear edge to form a ramp cooperating with the removable pin traversing the telescopic leg.
  • FIG. 1 is an elevation of a building and maintaining framework device fitted with a keybolt according to the invention
  • FIG. 2 is a partial side elevation showing, on a larger scale, the keybolt, and
  • FIG. 3 is a section taken substantially along the line IIIIII of FIG. 2.
  • FIG. I shows the applying of the keybolt, according to the invention, to a framework 1 shown, by way of example, in the form of a fixed scaffolding.
  • This fixed scaffolding consists of a certain number of building members 2 and respectively formed by three tubes 3, 4 and 5 mutually assembled at one of their ends for extending in three planes, perpendicularly to one another. The holding of these tubes in their right angular relation is effected by angle-braces 6.
  • the building elements 2, eight in number for instance, are mutually assembled at the free ends of their tubes 3, 4 and 5 to form a rigid framework of parallelipipedic shape comprising four vertical tubular uprights 3.
  • the fixed scaffolding thus made is completed by positioning, at the bottom ends of the four vertical uprights, of runway members 7, preferably removable, of telescopic legs 8, and at the top ends of said uprights of supporting members 9.
  • the runway members 7 can be made by external or internal rollers whose spindles are mounted in bearings made level with the lower ends ofthe uprights 3.
  • Each telescopic leg 8 includes a tube sliding on a corresponding vertical upright which is provided with a retaining member ensuring the axial locking of said tube in maximum penetration when the fixed scaffolding rests on the runway members.
  • Each leg 8 has a series of transversal holes 8; FIG.
  • Each supporting member 9 comprises a sleeve 12 fixed to the top part of the corresponding vertical tubular upright.
  • the sleeve 12 is tapped for accommodating a threaded rod 13 whose top end is able to revolve on a catch 14 made integral with the core of a stirrup-piece I5 whose arms 16 rise vertically.
  • the four stirrup-pieces 15 are oriented in pairs for supporting two parallel girders 17 on which the horizontal table 18 rests.
  • Said table can be made in any suitable manner, particularly of sections 19 for holding shuttering or mold form 20 for making a horizontal construction or a levelling flooring-slab 21.
  • jacks 22 hydraulic for instance, are adapted on the bottom terminal parts of the tubular uprights, so that their rods 23 cooperate with shoes 24 able to be axially locked, in an adjustable manner, on the telescopic legs 8.
  • a supply of fluid under pressure is controlled for causing the rods 23 to extend so that said rods by bearing on the shoe 24, ensure the raising of the fixed scaffolding by extension of the telescopic legs 8.
  • the pins 11 are engaged in the telescopic legs 8 for forming abutments on which the vertical tubular uprights bear.
  • the support members 9 are then adjusted by means of threaded rods 13 for imparting to the table the seating corresponding to the construction work 21 to be carried out.
  • the operations for putting into effect, such as those described above, also comprise the fitting of the keybolt, according to the invention, between the pin 11 and clamp 25 integral with the corresponding bottom end of the vertical tubular upright of each telescopic leg 8.
  • the keybolt is formed by a U- shaped stirrup-piece 26 or bracket comprising a semicylindrical core or light portion 27 whose internal radius substantially corresponds to that of the telescopic legs 8.
  • the core 27 connects two parallel rigid arms or wings 28 whose length is greater that the diameter of the legs 8.
  • the arms 28 have aligned holes 29a, 29b, 290, provided for receiving a locking pin 30 having a handle 31 secured to a chain or other flexible connection 32 with one of the arms or wings 28.
  • Each arm 28 has a rectilinear course 33, extending in the transversal plane defining one of the edges of the semicylindrical core or light 27, and a second course 34 sloped in a converging manner towards the course 33 and intercepting the second transversal plane defining the other edge of the semicylindrical core 27, but beyond the imaginary diametral plane of said core.
  • the course 34 is made as a function of the length of the arms or wings 28 so as to have a same relatively slight slope and make ramps for cooperating with the terminal parts of the pin 11 projecting on either side of the telescopic leg 8.
  • each keybolt is inserted between the clamps 25 to rest by their ramps 34 on the pins 11 previously engaged in the corresponding holes of the telescopic legs 8.
  • the engaging of each keybolt is done so that the core 27 is appreciably applied against the corresponding peripheral surface of the telescopic leg 8.
  • the transversal locking of each keybolt is then assured by positioning the locking pin 30 in the holes 29a made in the arms or wings 28 for limiting, with the interior peripheral surface of the core 27, a passage section sufficient for the telescopic leg 8.
  • the keybolts 26 In this position, in which the pins 11 cooperate with the beginning part of the sloped ramps 34, the keybolts 26 cannot be subjected to any accidental transversal or axial displacement and, consequently, occupy a definite position which enables the supply to thejacks 22 to be reversed so as to make the framework 1 rest by the clamps 25 on the keybolts 26 bearing on the terminal parts of the pins 11.
  • each keybolt 26 is then moved in the direction of the arrow f by repeated blows given level with the terminal parts of the arms or Wings 18.
  • the transversal sliding of each keybolt 26 is easily done between the clamp 25 and the pin 11 owing to the presence of the ramps 34 whose slope is chosen for preventing a sudden unexpected disengaging.
  • each keybolt is normally carried out up to the moment when the locking keybolt 30, engaged in the holes 2911, is brought into contact with the telescopic leg 8.
  • the locking pins 30 also form safety members opposing any risk of complete disengagement, which might have the effect of subjecting the framework to an abrupt fall on to the pins 1 1.
  • the first transversal sliding stage of each pin can be followed by an identical stage by disengaging the locking pin 30 from the holes 29b for reintroduction in the holes 29c.
  • the jacks 22 are supplied with pressure fluid for extending piston rods 23 raising the framework to an extent just sufficient for relieving the various pins 11 which can thus be disengaged from the telescopic legs 8.
  • the complete lowering of the propping-up framework is then controlled by means of the jacks 22, contingently combined with the progressive displacement of the pins 11 in relation to the telescopic legs 8, in the case where it is necessary to provide safety elements capable of avoiding failures of jacks 22.
  • a keybolt for propping a vertically extensible framework and enabling selective lowering thereof for dismantling thereof comprising a rigid U-shaped bracket for straddling a lower leg of the framework and supported by a pin in said leg to constitute a stirrup for supporting an upper leg telescoped on the lower leg, said bracket including a bight portion connecting two parallel arms each having a horizontal rectilinear upper edge and a lower edge inclined upwardly from said bight portion toward the upper edge, said upper edges constituting the support stirrup and said lower edges constituting a ramp engageable with the supporting pin for lowering said stirrup when the bracket is moved transversely of the leg and means spanning said arms to limit transverse movement of the bracket.
  • a keybolt according to claim 2 wherein said arms are of a length substantially greater than the transverse dimensions of the framework leg to be straddled, said arms having a plurality of said pairs of aligned holes spaced longitudinally of said arms whereby said retainer may be removably inserted selectively in a pair of holes to retain said bracket in full supporting position or permit limited transverse movement of said bracket relative to the leg to enable an incremental lowering of said stirrup as the ramp edges slide on the leg supported pin.
  • a keybolt according to claim 2 comprising a flexible connector securing said retainer to said bracket.
  • a keybolt according to claim 1 wherein said bight portion is semicircular and has an internal radius substantially equal to the radius of the framework leg.
  • a keybolt according to claim 1 wherein said bight portion is semicylindrical with the ends thereof contiguous with said arms at a diametrically disposed plane, said inclined lower edges of said arms intersecting the lower edge of said bight portion beyond said plane.

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Mechanical Engineering (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Forms Removed On Construction Sites Or Auxiliary Members Thereof (AREA)
US12397A 1969-04-02 1970-02-18 Dismantling keybolt for a propping-up and supporting framework Expired - Lifetime US3632075A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR6910104A FR2039523A5 (de) 1969-04-02 1969-04-02

Publications (1)

Publication Number Publication Date
US3632075A true US3632075A (en) 1972-01-04

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Family Applications (1)

Application Number Title Priority Date Filing Date
US12397A Expired - Lifetime US3632075A (en) 1969-04-02 1970-02-18 Dismantling keybolt for a propping-up and supporting framework

Country Status (3)

Country Link
US (1) US3632075A (de)
DE (1) DE2015167A1 (de)
FR (1) FR2039523A5 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2450501A1 (de) 2010-11-08 2012-05-09 B Nova (Sas) Vorrichtung zum Verschieben einer Verschalungsplattform für eine Bodenplatte und/oder einen Balkon
US11834804B1 (en) * 2022-09-01 2023-12-05 Tom Malloy Corporation Retainer plate and retention pin for trench shoring securement

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011081794B4 (de) * 2011-08-30 2013-12-24 Doka Industrie Gmbh Schaltisch für das Gebiet des Bauwesens und Verwendung eines doppelt wirkenden Hydraulikzylinders

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1552912A (en) * 1924-06-20 1925-09-08 Samuel S Colt Wedge
GB342876A (en) * 1930-01-18 1931-02-12 Consett Iron Company Ltd Improvements in pit props
GB584220A (en) * 1944-12-16 1947-01-09 Mavor & Coulson Ltd Improvements in roof supports for use in mines

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1552912A (en) * 1924-06-20 1925-09-08 Samuel S Colt Wedge
GB342876A (en) * 1930-01-18 1931-02-12 Consett Iron Company Ltd Improvements in pit props
GB584220A (en) * 1944-12-16 1947-01-09 Mavor & Coulson Ltd Improvements in roof supports for use in mines

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2450501A1 (de) 2010-11-08 2012-05-09 B Nova (Sas) Vorrichtung zum Verschieben einer Verschalungsplattform für eine Bodenplatte und/oder einen Balkon
FR2967181A1 (fr) * 2010-11-08 2012-05-11 Nova B Dispositif pour deplacer une plateforme de coffrage de dalle et/ou de balcon.
US11834804B1 (en) * 2022-09-01 2023-12-05 Tom Malloy Corporation Retainer plate and retention pin for trench shoring securement

Also Published As

Publication number Publication date
FR2039523A5 (de) 1971-01-15
DE2015167A1 (de) 1971-01-21

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