US2861602A - Collapsible mandrel for manufacturing reinforcing cages - Google Patents

Collapsible mandrel for manufacturing reinforcing cages Download PDF

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US2861602A
US2861602A US629970A US62997056A US2861602A US 2861602 A US2861602 A US 2861602A US 629970 A US629970 A US 629970A US 62997056 A US62997056 A US 62997056A US 2861602 A US2861602 A US 2861602A
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Prior art keywords
bars
mandrel
angle bars
reinforcing
cage
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US629970A
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Ralph D Thomas
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ANNA M SEDGES
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ANNA M SEDGES
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B7/00—Moulds; Cores; Mandrels
    • B28B7/28—Cores; Mandrels
    • B28B7/30—Cores; Mandrels adjustable, collapsible, or expanding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21F—WORKING OR PROCESSING OF METAL WIRE
    • B21F27/00—Making wire network, i.e. wire nets
    • B21F27/12—Making special types or portions of network by methods or means specially adapted therefor
    • B21F27/121—Making special types or portions of network by methods or means specially adapted therefor of tubular form, e.g. as reinforcements for pipes or pillars
    • B21F27/122—Making special types or portions of network by methods or means specially adapted therefor of tubular form, e.g. as reinforcements for pipes or pillars by attaching a continuous stirrup to longitudinal wires
    • B21F27/124—Making special types or portions of network by methods or means specially adapted therefor of tubular form, e.g. as reinforcements for pipes or pillars by attaching a continuous stirrup to longitudinal wires applied by rotation
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
    • E04C5/01—Reinforcing elements of metal, e.g. with non-structural coatings
    • E04C5/06—Reinforcing elements of metal, e.g. with non-structural coatings of high bending resistance, i.e. of essentially three-dimensional extent, e.g. lattice girders
    • E04C5/0604—Prismatic or cylindrical reinforcement cages composed of longitudinal bars and open or closed stirrup rods
    • E04C5/0618—Closed cages with spiral- or coil-shaped stirrup rod

Definitions

  • This invention relates to mandrels generally and is more particularly directed to collapsible mandrels utilized in the manufacture of reinforcing cages to be placed in poured concrete piling, columns and the like.
  • a principal object of the present invention is to provide a collapsible mandrel for the production of reinforcing cages which readily release the cage from the mandrel along their four sides after being formed and welded to permit the removal of the reinforcing cage from the mandrel with ease.
  • a further object of the presentinvention is the provision of a collapsible mandrel for manufacturing reinforcing cages described as above which permits the production of cages of any desired length, weight or size.
  • a still further object of the present invention is to provide a collapsible mandrel characterized as above having any number of sides so. as .to produce reinforcing cages of any desired polygonal cross section.
  • a still further object of the present invention is to provide a collapsible mandrel consisting of a plurality of inner and outer nesting angle bars mounted on a rotatable shaft for producing reinforcing steel cages which when formed thereon is released for removal by shifting the outer nesting angle bars in the direction of the inner nesting bars.
  • Figure 1 is a perspective view of a collapsible mandrel embodying my invention with a reinforcing cage shown in part and in position as manufactured thereon with the mandrel in its contracted condition for removal of the cage.
  • Figure 2 is a top plan view thereof with the mandrel shown in its expanded condition.
  • Figure 3 is a cross sectional view taken along the line 33 of Figure 2, with the mandrel in its contracted position shown by dotted lines.
  • Figure 4 is an exploded view thereof with the reinforcing cage not shown.
  • Figure 5 is a perspective view of a completed reinforcing cage as seen when removed from the mandrel.
  • the numeral refers generally to my collapsible mandrel consisting of a main shaft 11 whose ends are mounted on supports (not shown) and provided with power operated drive mechanism (also not shown) for rotating the mandrel 10 in the manufacture of reinforcing cages as is explained in greater detail hereinafter.
  • Mounted 2,861,602 Patented Nov. 25, 1958 on the shaft 11 is a plurality of support members or plates 12 equally spaced therealong and welded or otherwise secured to the shaft 11 at their mid-portions so as to become integral therewith.
  • the outer periphery of the support plates 12 is provided with recesses 13 to receive therein angle bars or irons 14.
  • angle bars 14 mounted in parallel relation with each other and with the rotatable shaft 11.
  • any desired number of such angle bars 14 may be utilized depending upon the desired cross-sectional configuration of the reinforcing cages that is to be produced thereon. For example, if only three angle bars 14 are used, the reinforcing cage that is to be produced will then the cage will have five sides, if six angle bars 14 are used, then the cage will be hexagonal in cross section, etc.
  • Each of the angle bars 14 is provided with leg portions 14A and 14B set at approximately right angle to each other. In nesting relation with each of the angle bars 14 there is positioned a similar angle bar 15 lying along the full length of the angle bars 14'having leg portions 15A and 15B lying in parallel relation with the leg portions 14A and 14B of the angle bars 14.
  • the sliding movements of the outer angle bars 15 with relation to the inner angle 1 bars 14 are limited by virtue of a plurality of stop members 16 welded or otherwise secured to the outer-edge portions of the outer angle bars 15 and extending inwardly through slots 17 formed in the inner angle bars 14.
  • the length of the slots 17 determines the length of. travel of the outer angle bars 15 on the inner angle bars 14.
  • Means are provided for collapsing and expanding the outer angle bars 15 comprising a plurality of Wedges 19 mounted on each of the leg portions 14A and 14B of the inner angle bars 14 and a plurality of similarly positioned wedges 20 on the leg portions 15A and 15B of the outer angle bars 15.
  • the Wedges 19 and 20 are in opposed contact relationship with their respective inclined surfaces 21 and 22 facing in a direction toward each other as best shown by Figure 3 and their elevated surfaces 23 and 24 mounted adjacent the inclined surfaces 21 and 22 respectively.
  • a reinforcing steel bar 25 is placed in each of the angle bars 15 and a binding wire 26 is Wound about the mandrel 10 in spiral loops as shown by Figures 1 and 2.
  • the shaft 11 is geared to a source of power which slowly revolves the mandrel as the binding wire 26 is payed out onto the outer periphery of the mandrel 10.
  • the binding Wire 26 contacts the reinforcing steel rods 25, they are welded or otherwise secured together.
  • a cage 27 as shown by Figure is formed along the full length of the reinforcing steel rods 25, the rotating movement of the mandrel is stopped.
  • the angle bars 15 are made to slide along the angle bars 14 to their contracted or collapsed position with the inclined surfaces 21 and 22 of the wedges 19 and respectively in contact relation.
  • the angle bars 15 are made to slide (downwardly as viewed in Figure 3) until the cage becomes released from the angle bars 15 when the latter While sliding along the angle bars 14 move in the direction of the shaft 11 on all four sides thereof.
  • the cage 27 is continued to be pulled from the mandrel 10 until it is freed therefrom.
  • the operation is again repeated by placing reinforcing rods 25 in the angle bars 15 which had been placed in their distended position, and the binding wire 26 would thereabout to form another cage 27.
  • a mandrel for fabricating reinforcing steel cages comprising a rotatable shaft, support members mounted on said shaft and extending radially of said shaft, a plurality of inner elongated bars mounted on said support members, said inner elongated bars being substantially parallel to said shaft and symmetrically disposed about said shaft, each of said bars having a slot, a plurality of further elongated bars, each of said further elongated bars having troughs for receiving longitudinally disposed reinforcing rods and being positioned in spaced parallel relation with one of said inner bars, a stop member mounted on each of said further elongated bars and extending through said slots for limiting the sliding movement of said further elongated bars with relation to said inner elongated bars, a locking member mounted on each of said stop members for preventing said stop members from leaving said slots, a plurality of pair of Wedges mounted on said inner and further elongated bars in opposed relation, said wedges each having an inclined surface and an elevated surface whereby when said elevated

Description

R. D. THOMAS 2,861,602
COLLAPSIBLE MANDREL FOR MANUFACTURING REINFORCING CAGES Nov. 25 195 8 3 Sheets-Sheet 1 Filed Dec. 21, 1956 F IG. 1
INVENTOR. RALPH D. THOMAS BY ATTORNEY R. D. THOMAS COLLAPSIBLE MANDREL FOR MANUFACTURING REINFORCING CAGES Filed Dec. 21, 1956 Nov. 25, 1958 3 Sheets-Sheet 2 INVENTOR.
FIG. 2
RALPH D. THOMAS ATTORNEY R. D. THOMAS 2,861,602
COLLAPSIBLE MANDREL FOR MANUFACTURING REINFORCING CAGES Nov. 25, 1958 3 Sheets-Sheet 3 Filed Dec. 21, 1956 INVENTOR. RALPH D. THOMAS BY ATTORNEY United States Patent COLLAPSIBLE MANDREL FOR MANUFACTURING REINFORCIN G CAGES Ralph D. Thomas, Miami, Fla., assignor to Anna M. Sedges, Miami Beach, Fla.
Application December 21,1956, Serial No. 629,970
1 Claim. (Cl. 14092.2)
This invention relates to mandrels generally and is more particularly directed to collapsible mandrels utilized in the manufacture of reinforcing cages to be placed in poured concrete piling, columns and the like.
A principal object of the present invention is to provide a collapsible mandrel for the production of reinforcing cages which readily release the cage from the mandrel along their four sides after being formed and welded to permit the removal of the reinforcing cage from the mandrel with ease.
A further object of the presentinvention is the provision of a collapsible mandrel for manufacturing reinforcing cages described as above which permits the production of cages of any desired length, weight or size.
A still further object of the present invention is to provide a collapsible mandrel characterized as above having any number of sides so. as .to produce reinforcing cages of any desired polygonal cross section.
A still further object of the present invention is to provide a collapsible mandrel consisting of a plurality of inner and outer nesting angle bars mounted on a rotatable shaft for producing reinforcing steel cages which when formed thereon is released for removal by shifting the outer nesting angle bars in the direction of the inner nesting bars.
With these and other objects in view, the'invention will be best understood from a consideration of the following detailed description taken in connection with the accompanying drawings forming a part of this specification, with the understanding, however, that the invention is not confined to any strict conformity with the showing of the drawings but may be changed or modified so long as such changes or modifications mark no material departure from the salient features of the invention as expressed in the appended claim.
In the drawings:
Figure 1 is a perspective view of a collapsible mandrel embodying my invention with a reinforcing cage shown in part and in position as manufactured thereon with the mandrel in its contracted condition for removal of the cage.
Figure 2 is a top plan view thereof with the mandrel shown in its expanded condition.
Figure 3 is a cross sectional view taken along the line 33 of Figure 2, with the mandrel in its contracted position shown by dotted lines.
Figure 4 is an exploded view thereof with the reinforcing cage not shown.
Figure 5 is a perspective view of a completed reinforcing cage as seen when removed from the mandrel.
Referring to the drawings wherein like numerals are used to designate similar parts throughout the several views, the numeral refers generally to my collapsible mandrel consisting of a main shaft 11 whose ends are mounted on supports (not shown) and provided with power operated drive mechanism (also not shown) for rotating the mandrel 10 in the manufacture of reinforcing cages as is explained in greater detail hereinafter. Mounted 2,861,602 Patented Nov. 25, 1958 on the shaft 11 is a plurality of support members or plates 12 equally spaced therealong and welded or otherwise secured to the shaft 11 at their mid-portions so as to become integral therewith. The outer periphery of the support plates 12 is provided with recesses 13 to receive therein angle bars or irons 14. There is shown, by way of illustration, four such angle bars 14 mounted in parallel relation with each other and with the rotatable shaft 11. However any desired number of such angle bars 14 may be utilized depending upon the desired cross-sectional configuration of the reinforcing cages that is to be produced thereon. For example, if only three angle bars 14 are used, the reinforcing cage that is to be produced will then the cage will have five sides, if six angle bars 14 are used, then the cage will be hexagonal in cross section, etc.
Each of the angle bars 14 is provided with leg portions 14A and 14B set at approximately right angle to each other. In nesting relation with each of the angle bars 14 there is positioned a similar angle bar 15 lying along the full length of the angle bars 14'having leg portions 15A and 15B lying in parallel relation with the leg portions 14A and 14B of the angle bars 14. The sliding movements of the outer angle bars 15 with relation to the inner angle 1 bars 14 are limited by virtue of a plurality of stop members 16 welded or otherwise secured to the outer-edge portions of the outer angle bars 15 and extending inwardly through slots 17 formed in the inner angle bars 14. The length of the slots 17 determines the length of. travel of the outer angle bars 15 on the inner angle bars 14. A pin 18 which is mounted at the free end of each of the stop members 16 prevents the nesting angle bars 14 and 15 from becoming inadvertently separated. Means are provided for collapsing and expanding the outer angle bars 15 comprising a plurality of Wedges 19 mounted on each of the leg portions 14A and 14B of the inner angle bars 14 and a plurality of similarly positioned wedges 20 on the leg portions 15A and 15B of the outer angle bars 15. The Wedges 19 and 20 are in opposed contact relationship with their respective inclined surfaces 21 and 22 facing in a direction toward each other as best shown by Figure 3 and their elevated surfaces 23 and 24 mounted adjacent the inclined surfaces 21 and 22 respectively.
With the construction as described above, when the mandrel 10 is in its contracted or collapsed position, the outer angle bars 15 are at the position in which they are closest to the inner angle bars 14 as shown by Figure 1 and by the dotted lines in Figure 3. In this position the inclined surfaces 21 and 22 of the wedges 19 and 20 respectively are in contact relation with each other. Also, the stop members 16 will be in abutting relation with one end of the slots 17, namely the lower end of the slots 17 as viewed in Figure 1. When the outer angle bars 15 are slid along the inner angle bars 14 to their other extreme position wherein the stop members 16 abut against the other end of the slots 17, the wedges 20 will slide on the wedges 19 until the elevated surface 24 of the wedge 15 has come to rest upon the elevated surface 23 of the wedge 19 during this sliding movement, the outer angle bars 15 have moved outwardly in a direction awaffrom the main shaft 11, a distance equal to the thickness of the Wedges 19 and 20. That distance may be noted in Figure 3 which shows the distended position of the angle bars 15 in solid lines and their contracted positions I by dotted lines.
bars 15 are now in the position at which they are the farthest away from the shaft 11. A reinforcing steel bar 25 is placed in each of the angle bars 15 and a binding wire 26 is Wound about the mandrel 10 in spiral loops as shown by Figures 1 and 2. In practise, the shaft 11 is geared to a source of power which slowly revolves the mandrel as the binding wire 26 is payed out onto the outer periphery of the mandrel 10. At each position that the binding Wire 26 contacts the reinforcing steel rods 25, they are welded or otherwise secured together. When a cage 27 as shown by Figure is formed along the full length of the reinforcing steel rods 25, the rotating movement of the mandrel is stopped. Now, the angle bars 15 are made to slide along the angle bars 14 to their contracted or collapsed position with the inclined surfaces 21 and 22 of the wedges 19 and respectively in contact relation. As a practical matter, by pulling on the completed cage 27, the angle bars 15 are made to slide (downwardly as viewed in Figure 3) until the cage becomes released from the angle bars 15 when the latter While sliding along the angle bars 14 move in the direction of the shaft 11 on all four sides thereof. The cage 27 is continued to be pulled from the mandrel 10 until it is freed therefrom. The operation is again repeated by placing reinforcing rods 25 in the angle bars 15 which had been placed in their distended position, and the binding wire 26 would thereabout to form another cage 27.
Having now disclosed my invention and realizing that, in view of my disclosure many other modifications in details and construction or design will readily occur to those skilled in the art, I do not choose to limit myself except as in the appended claim.
What I claim as new is:
A mandrel for fabricating reinforcing steel cages comprising a rotatable shaft, support members mounted on said shaft and extending radially of said shaft, a plurality of inner elongated bars mounted on said support members, said inner elongated bars being substantially parallel to said shaft and symmetrically disposed about said shaft, each of said bars having a slot, a plurality of further elongated bars, each of said further elongated bars having troughs for receiving longitudinally disposed reinforcing rods and being positioned in spaced parallel relation with one of said inner bars, a stop member mounted on each of said further elongated bars and extending through said slots for limiting the sliding movement of said further elongated bars with relation to said inner elongated bars, a locking member mounted on each of said stop members for preventing said stop members from leaving said slots, a plurality of pair of Wedges mounted on said inner and further elongated bars in opposed relation, said wedges each having an inclined surface and an elevated surface whereby when said elevated surfaces of said opposed Wedges are in contact relation said further elongated bars are a greater distance from said inner bars than when said inclined surfaces of said opposed wedges are placed in contact relationship.
References Cited in the file of this patent UNITED STATES PATENTS 211,247 McVoy Jan. 7, 1879 459,265 Barton Sept. 8, 1891 1,260,786 Manz Mar. 26, 1918 1,334,704 Kubasta Mar. 23, 1920 1,589,456 Beghetti June 22, 1926 2,151,034 Kauppert Mar. 21, 1939 2,564,482 Kentis Aug. 14, 1951
US629970A 1956-12-21 1956-12-21 Collapsible mandrel for manufacturing reinforcing cages Expired - Lifetime US2861602A (en)

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3254681A (en) * 1962-06-25 1966-06-07 Jr Leroy Magers Reinforcing cage apparatus and method of making
EP0196542A2 (en) * 1985-03-30 1986-10-08 Hubert Keller Method and device for making a reinforcing cage for reinforced-concrete building elements
NL1026278C2 (en) * 2004-05-27 2005-11-30 Steven Edward Kelly Structure element, basic element, holding means and aid for manufacturing a reinforcement, method for constructing such an aid and method for manufacturing a reinforcement.
ITBO20090578A1 (en) * 2009-09-11 2011-03-12 Gricor Impianti S R L BAR SUPPORT DEVICE FOR MACHINES TO CARRY OUT METALLIC CAGES
WO2013115823A1 (en) * 2012-02-02 2013-08-08 Empire Technology Development Llc Modular concrete reinforcement
US10190315B2 (en) 2016-08-09 2019-01-29 Dennis Moore Rebar construction and transportation system
CN112681617A (en) * 2020-12-23 2021-04-20 同济大学 Fiber reinforced composite material spiral stirrup and method thereof

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US211247A (en) * 1879-01-07 Improvement in processes of galvanizing barbed fence-wire in the coil
US459265A (en) * 1891-09-08 Contracting core for paper rolls
US1260786A (en) * 1916-12-07 1918-03-26 Frederick E Theodore Manz Sheeting-machine.
US1334704A (en) * 1919-07-07 1920-03-23 Bruce W Palmer Coil-forming apparatus
US1589456A (en) * 1924-08-18 1926-06-22 Beghetti Peter Wire bending and cutting machine
US2151034A (en) * 1935-08-03 1939-03-21 Kauppert William Coil winding and setting machine
US2564482A (en) * 1945-08-04 1951-08-14 Yoder Co Expansible drum

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US211247A (en) * 1879-01-07 Improvement in processes of galvanizing barbed fence-wire in the coil
US459265A (en) * 1891-09-08 Contracting core for paper rolls
US1260786A (en) * 1916-12-07 1918-03-26 Frederick E Theodore Manz Sheeting-machine.
US1334704A (en) * 1919-07-07 1920-03-23 Bruce W Palmer Coil-forming apparatus
US1589456A (en) * 1924-08-18 1926-06-22 Beghetti Peter Wire bending and cutting machine
US2151034A (en) * 1935-08-03 1939-03-21 Kauppert William Coil winding and setting machine
US2564482A (en) * 1945-08-04 1951-08-14 Yoder Co Expansible drum

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3254681A (en) * 1962-06-25 1966-06-07 Jr Leroy Magers Reinforcing cage apparatus and method of making
EP0196542A2 (en) * 1985-03-30 1986-10-08 Hubert Keller Method and device for making a reinforcing cage for reinforced-concrete building elements
EP0196542A3 (en) * 1985-03-30 1987-09-30 Hubert Keller Method and device for making a reinforcing cage for reinforced-concrete building elements
US9032687B2 (en) 2004-05-27 2015-05-19 Steven Edward Kelly System for manufacturing a reinforcement
WO2005115682A1 (en) * 2004-05-27 2005-12-08 Steven Edward Kelly Structural element, basic element, holding means and auxiliary means for the manufacture of a reinforcement, method for constructing such an auxiliary means and method for manufacturing a reinforcement
US20080190054A1 (en) * 2004-05-27 2008-08-14 Steven Edward Kelly Structural Element, Basic Element, Holding Means and Auxiliary Means for the Manufacture of a Reinforcement, Method for Constructing Such an Auxiliary Means and Method for Manufacturing a Reinforcement
EA010843B1 (en) * 2004-05-27 2008-12-30 Стивен Эдвард Келли Means for manufacture of a reinforcement, a method constructing an auxiliary means for the manufacture of a reinforcement and method for the manufacture of a reinforcement
KR101300969B1 (en) * 2004-05-27 2013-08-27 스티븐 에드워드 켈리 Structural element, basic element, holding means and auxilliary means for the manufacture of a reinforcement, method for constructing such an auxilliary means and method for manufacturing a reinforcement
US8701370B2 (en) 2004-05-27 2014-04-22 Steven Edward Kelly Method for manufacturing a reinforcement
NL1026278C2 (en) * 2004-05-27 2005-11-30 Steven Edward Kelly Structure element, basic element, holding means and aid for manufacturing a reinforcement, method for constructing such an aid and method for manufacturing a reinforcement.
ITBO20090578A1 (en) * 2009-09-11 2011-03-12 Gricor Impianti S R L BAR SUPPORT DEVICE FOR MACHINES TO CARRY OUT METALLIC CAGES
WO2011030297A1 (en) * 2009-09-11 2011-03-17 Schnell Impianti S.R.L. Device for manufacturing reinforcement metal cages with support device for bars
WO2013115823A1 (en) * 2012-02-02 2013-08-08 Empire Technology Development Llc Modular concrete reinforcement
US9725867B2 (en) 2012-02-02 2017-08-08 Empire Technology Development Llc Modular concrete reinforcement
US10190315B2 (en) 2016-08-09 2019-01-29 Dennis Moore Rebar construction and transportation system
CN112681617A (en) * 2020-12-23 2021-04-20 同济大学 Fiber reinforced composite material spiral stirrup and method thereof

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