US3748720A - Process for the production of reinforcement - Google Patents

Process for the production of reinforcement Download PDF

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Publication number
US3748720A
US3748720A US00226175A US3748720DA US3748720A US 3748720 A US3748720 A US 3748720A US 00226175 A US00226175 A US 00226175A US 3748720D A US3748720D A US 3748720DA US 3748720 A US3748720 A US 3748720A
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United States
Prior art keywords
bars
mat
transverse
row
reinforcing
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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
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US00226175A
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English (en)
Inventor
G Versteeg
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IMEX AG
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IMEX AG
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Publication date
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    • 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 [3D] extent, e.g. lattice girders
    • E04C5/0627—Three-dimensional reinforcements composed of a prefabricated reinforcing mat combined with reinforcing elements protruding out of the plane of the mat
    • 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
    • B21F27/20—Making special types or portions of network by methods or means specially adapted therefor of plaster-carrying network
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K11/00—Resistance welding; Severing by resistance heating
    • B23K11/002—Resistance welding; Severing by resistance heating specially adapted for particular articles or work
    • B23K11/008—Manufacturing of metallic grids or mats by spot welding
    • B23K11/0086—Grids or mats used in concrete structures

Definitions

  • ABSTRACT A reinforcement for concrete ceilings, concrete walls and the like is produced by providing first a reinforcing mat from longitudinal reinforcing bars and groupwise disposed transverse reinforcing bars. in one or more spaced rows of meshes of the mat which extend parallel to the longitudinal reinforcing bars, the transverse bars of each group in such mesh rows are bent apart in directions obliquely to the plane of the mat and simultaneously flexed V-wise in such a way that the bent and flexed transverse bars meet each other again groupwise at their flex apexes, so as to form a row of protruding pyramids instead of each of these mesh rows.
  • the apparatus for producing such reinforcement comprises pairwise supporting means to receive and support the reinforcing mat, pairwise securing means cooperating with the supporting means for holding the mat, bending means for simulatenously bending apart and V-wise flexing the transverse bars of a row of meshes, transport means for handling a straight individual bar, and welding means for welding the individual bar to the row of pyramids formed by bending and flexing the transverse bars of a row of meshes.
  • This invention relates to a process and apparatus for the production of reinforcement for concrete ceilings, concrete walls and the like.
  • Prefabricated concrete slabs having a reinforcement which is partially embedded in the slabs and partially protruding from one flat side of the slabs in the form of lattice girders, are frequently employed in the production of concrete ceilings.
  • a stratum of fresh concrete is disposed on top of the slabs, to embed the extending lattice girders of the reinforcement and to complete the slabs to form finished concrete ceilings.
  • the slabs and concrete stratum are thus interconnected by the embedded lattice girders to form an integral body.
  • the invented process of producing reinforcement for concrete ceilings, concrete walls and the like comprises providing a reinforcing mat comprising longitudinal reinforcing bars and groupwise disposed transverse reinforcing bars; then, in one or more spaced rows of meshes of the mat which extend parallel to the longitudinal reinforcing bars, bending the transverse bars of each group of such mesh rows apart in directions obliquely to the plane of the mat but towards the same side of that plane, and simultaneously flexing the bent transverse bars V-wise in such a way that the bent and flexed transverse bars meet each other again groupwise at their flex apexes, so as to form a row of protruding pyramids instead of each of these mesh rows; and thereupon interconnecting the summits of the pyramids by means of a straight individual bar to form a protruding lattice girder.
  • the invention further provides an apparatus to be used in performing the process according to the invention, said apparatus in an embodiment comprising pairwise supporting means to receive the reinforcing mat, pairwise securing means cooperating with the supporting means for holding the mat, bending means disposed between each pair of supporting means and engageable and disengageable in directions inclined to the bearing surface thereof for simultaneously bending apart and V-wise flexing the transverse bars of a row of meshes, transport means for handling a straight individual bar, and welding means disposed between each pair of supporting means and engageable and disengageable perpendicularly to the bearing surface thereof for welding the individual bar. to the row of pyramids formed by bending apart and flexing the transverse bars of a row of meshes.
  • the process according to the invention can be performed in a simple manner.
  • FIGS. 1 and 2 show an embodiment of the various stages of manufacture in the process according to the invention
  • FIG. 3 shows the finished product (in isometric projection
  • FIGS. 4 and 6 show an embodiment of the apparatus according to the invention in two difierent working positions (in front elevation and in partial cross-section).
  • FIGS. 5 and 7 are sections made along the lines V-V and VII-VII in FIGS. 4 and 6 respectively.
  • FIG. 8 schematically shows the various possible settings of the apparatus.
  • the starting material is a flat reinforcing mat (FIG. 1) comprising longitudinal reinforcing bars 2 and double transverse reinforcing bars 3,4.
  • This reinforcing mat may be manufactured in any desired manner, e.g., by spot-welding or by plaiting.
  • the longitudinal bars 2 are of limited length, but the length of the transverse bars 3,4 is not limited, so that continuous manufacture and processing is possible.
  • Most of the meshes of the reinforcing mat are of normal length and width, but in some mesh rows 5,6 spaced apart from each other for some distance and extending parallel to the longitudinal bars 2, the meshes are formed with a larger width as viewed in the direction of the transverse bars 3,4.
  • the flexed apex 8 of the transverse bar 3' meets the flexed apex 9 of the transverse bar 4' of an adjacent mesh on one side
  • the flexed apex 9 of the transverse bar 4 (initially close beside said bar 3) meets the flexed apex 8 of the transverse bar 3' of an adjacent mesh on the other side.
  • the boundary bars 2 of the mesh row 5 come closer together until they are in the dotted position 2 and thus form a mesh row having the same width as the other rows of meshes.
  • the transverse bars 3',4' form a row of protruding pyramids 10 (FIG. 2).
  • the reinforcement is then completed by interconnection of the summits 11 of these pyramids 10 by means of an individual straight bar 12 to form a protruding lattice girder 13.
  • the individual bar can, for example, have a round or a profiled cross-section.
  • the mesh row 6 Simultaneously with the mesh row 5 the mesh row 6 has, as shown in FIG. 2, undergone the same stages of processing, so that there, too, a protruding lattice girder 14 has been formed.
  • pyramids e.g.,
  • FIG. 3 the lattice girder 13 with some adjacent parts is shown again, in isometric projection.
  • the individual bar 12 is disposed over the summits ll of the pyramids and is there connected to the pyramids,e.g., by spot-welding.
  • transverse bars in the reinforcing mat need not necessarily be present in a double arrangement, but may instead also be disposed in groups of three or more. Instead of performing the process on the mesh rows 5 and 6 simultaneously, these mesh rows can be dealt with consecutively.
  • the bending and flexing operation need not always be obliquely upward, as illustrated, but may also just as successfully be obliquely downward.
  • the individual bar 12 may be disposed under, instead of upon, the summit 11 and be welded there.
  • the resulting final product has adequate strength in the direction of the transverse bars. If additional bracing is desired, however, then additional transverse bars may be disposed at the base of the lattice girders and may, if necessary, be connected to the longitudinal bars, or else a complete second reinforcing mat can be added.
  • the plates are pivotably attached in such a manner that they may be swung upward from their normal horizontal position by a small angular distance in the direction of the arrows 18,18 (FIG. 7), the pivot shafts 19,19 being the centres of rotation.
  • each securing device 20,20 disposed pairwise opposite one another and each attached to a shaft 21,21 connected rotatably to the frame 15.
  • these securing devices 20,20 can all be swivelled simultaneously into and out of contact with the bearing plates 16,16 under them, so as to grip or release the reinforcing mat laid on the plates and to leave the region of the working gap 17 always unobstructed.
  • the active end of each securing device 20,20 is so formed that it can engage simultaneously with two (or more) transverse bars disposed side by side in the reinforcing mat (FIG.6).
  • the angle of inclination of the two hydraulic cylinder groups 24 and 25 is adjustable.
  • the cylinders in the group are all pivotably attached at the bottom (at 29) to a connecting rod 30 and are all pivotably attached at the top (at 31) to projections 32 on a counterweight beam 33.
  • lever systems each comprising a shaft bushing 34,34 and two levers 35,35 and 36,36 rigidly connected to the bushing.
  • the levers are each pivotably connected (at 37,37) to one end of the connecting rod 30 and are also pivotably connected (at 38,38) to other projections 39,39 at each end of the counterweight beam 33.
  • the counterweight beam is supported at each end on the ground through a set of folding wedges 40,40 and 41,41 which are simultaneously movable by means of a screw spindle 42.
  • the hydraulic cylinder group 25 is also adjustable in a similar manner, by means of a connecting rod 300, a counterweight beam 330, two paired lever systems 34a, 35a, 36a, two sets of folding wedges 40a, 41a, etc. Corresponding parts have been given corresponding reference numbers.
  • the apparatus described comprises two groups of welding heads 44,45, disposed pairwise and cooperating with one another, for connecting a straight individual bar by spot-welding to the parts of the reinforcing mat which have been bent by the bending punches 22,23.
  • the top welding heads 44 are above the bearing plates 16,16 and each about mid-way between two pairs of securing devices (FIGS. 4 and 3). They are all so adjustable simultaneously in the vertical direction by means of hydraulic cylinders 46 and piston rods 47 that they can meet the bending punches 22 and 23 in the engaged position thereof when the apparatus is in operation (FIG. 6).
  • the bottom welding heads 45 are below the bearing plates 16,16 and vertically below the top welding heads 44 and can all be moved vertically up and down simultaneously by means of hydraulic cylinders 48 and piston rods 49.
  • the movement of the bottom welding heads 45 is so controlled that they are completely engageable, through the working gap 17, into the vicinity of the top welding heads 44 and are also completely disengageable therefrom.
  • the top and bottom welding heads 44 and 45 meet one another in pairs in the engaged position and can act upon the intermediately disposed parts of a reinforcement to be processed (individual bar and bent parts of the reinforcing mat).
  • the stroke of the piston rods 49 is adjustable to suit different heights of the top welding heads 44.
  • top welding heads 44 and the bottom welding heads 45 are of rather wide construction (FIG. 4) in order to ensure that they can always act on the parts of the mat which have been bent by the bending punches 22,23 whatever the angle of inclination of the hydraulic cylinder groups 24,25 may be.
  • a container 52 for the individual bars to be welded is disposed on the feed side of the apparatus (FIGS. 5 and 7) and is so formed that the individual bars 12 can be dispensed only one at a time.
  • Under the container 52 are disposed some slides 54, each comprising a groove 53 for receiving the individual bar thus dispensed. These slides can be moved forward in the arrowed direction 55 by means of a drive (not shown) until they reach the position 54' (shown dotted in FIG. 7) in the vicinity of the top welding heads 44 and can then, after delivering the individual bar, be moved back to the original position.
  • the container 52 is provided with supports 56 which extend into the vicinity of the top welding heads 44 and prevent the individual bar from falling when the slides 54 are moved back.
  • the container 52, together with the slides 54 and the supports 56 are adjustable to various angular positions about a shaft 57.
  • the angle of inclination of the hydraulic cylinder groups 24,25, the stroke of the piston rods 26,27, the height of the top welding heads 44, the stroke of the piston rods 49 and the angular position of the container 52 are set to the desired values.
  • the securing devices 20,20 are in their top and swung-apart position (FIG. 5), the bending punches 22,23 in their disengaged position (FIG. 4), and the bottom welding heads 45 also in their disengaged position (FIG. 4).
  • the securing devices 20,20 are swung down (FIG. 5) until they touch the reinforcing mat on the bearing plates 16,16 and grip this mat by each engaging with a double transverse bar 4.
  • the first step of the production process starts when the two groups of bending punches 22 and 23 are engaged, through the working gap 17, into the vicinity of the reinforcing mat.
  • the studs 28 on the bending punches 22,23 engage with the'double transverse bar 3,4 of the meshrow 5 and these punches then move upward in two intersecting directions, inclined in relation to the plane of the mat, so that they bend these transverse bars 3,4 apart and also flex them V-wise.
  • the bending punches 22,23 have reached their fully engaged position, they meet each other in pairs, and the bent transverse bars 3',4 also again meet each other in pairs, but in a combination different from before. Furthermore these bent transverse bars 3',4' meet the top welding heads 44 adjusted to the appropriate height.
  • the second step of the production process starts when the bottom welding heads 45 are moved from their disengaged position through the working gap 17 to their engaged position in the vicinity of the top welding heads 44.
  • the bottom welding heads 45 act upon the underside of the pyramid summits 11 which have been formed and lift these summits (with the individual bar 12 on them) until the individual bar has thus been lifted off its slides 54 and pressed into the grooves in the top welding heads 44.
  • the supports 56 prevent the individual bar 12 from falling.
  • the slides 54 are moved back to their initial position.
  • the welding heads 44,45 are electrically heated, so that the individual bar is thereby welded to the row of pyramids and fixed to them.
  • the resulting product can be supplied commercially in sections of desired length or else in rolled form.
  • FIGS. 4 to 7 only one pair of bearing plates 16,16 with associated securing devices 20,20 bending punches 22,23, welding heads 44,45 and one container 52 have been shown, a number of such units can of course be disposed side by side in the apparatus according to the invention, so that a number of mesh rows of one and the same reinforcing mat can be dealt with simultaneously. Also, the shape of the securing devices, bending punches, etc., need not necessarily be as illustrated. Other variants will be obvious to an expert in the art.
  • a process of producing reinforcement for concrete ceilings, concrete walls and the like which comprises the following steps:

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Mechanical Engineering (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Wire Processing (AREA)
US00226175A 1971-02-18 1972-02-14 Process for the production of reinforcement Expired - Lifetime US3748720A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH237871A CH536423A (de) 1971-02-18 1971-02-18 Verfahren und Vorrichtung zur Herstellung einer Bewehrung für Betondecken, Betonwände und dergleichen

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US3748720A true US3748720A (en) 1973-07-31

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US00226175A Expired - Lifetime US3748720A (en) 1971-02-18 1972-02-14 Process for the production of reinforcement

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US (1) US3748720A (de)
AT (1) AT319706B (de)
CH (1) CH536423A (de)
DE (1) DE2205852A1 (de)
GB (1) GB1370986A (de)
IL (1) IL38755A (de)
NL (1) NL7202145A (de)

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3886646A (en) * 1974-05-30 1975-06-03 John C Broderson Method for constructing an awning
US3957193A (en) * 1974-05-30 1976-05-18 Broderson John C Method for constructing an easily storable awning
US4003178A (en) * 1974-05-13 1977-01-18 Robert Charles Douthwaite Open mesh metal panels
US4245926A (en) * 1977-05-17 1981-01-20 Magyar Szenbanyaszati Troszt Welded grid, primarily for securing underground cavities, cavity systems, as well as process for making the grid
US5228613A (en) * 1991-10-01 1993-07-20 Compagnucci - S.P.A. Machine for the automatic and continuous production of wire winding spools
US5235791A (en) * 1992-04-28 1993-08-17 Yaguchi Kenzai Khakko Co., Ltd. Deck plate
US20080172974A1 (en) * 2007-01-19 2008-07-24 Suarez Felix E Interlocking Mesh
WO2012001460A1 (en) * 2010-06-30 2012-01-05 A.W.M. S.P.A. Method for continous manufacturing of three-dimensional electro -welded metal nets made by stacking of a plurality of flat nets; apparatus used for such manufacturing of three-dimensional metal nets
US20130295340A1 (en) * 2011-01-07 2013-11-07 Areva Np Gmbh Protective system for walls of buildings or containers
CN107717254A (zh) * 2017-11-14 2018-02-23 中交隧道工程局有限公司 一种结点缠绕蝴蝶筋加工装置及方法
CN113231580A (zh) * 2021-06-15 2021-08-10 中交第二航务工程局有限公司 一种超大直径环形钢筋网片部品成型工艺
US20210254354A1 (en) * 2018-09-10 2021-08-19 Trádartiklar Hillerstorp Ab Mesh panel and a safety barrier system

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT343438B (de) * 1975-04-09 1978-05-26 Bucher Franz Verfahren zum herstellen eines gitter- bzw. bugeltragers
FR2529124A1 (fr) * 1982-06-23 1983-12-30 Bentzmann Bertrand De Dispositif de fabrication d'armatures pour beton arme
CH688519A5 (de) * 1994-06-24 1997-10-31 Fischer Reinach Ag Durchstanz-Bewehrung fuer gestuetzte Betondecken im Bereiche von deren Stuetzen sowie Verfahren zu deren Herstellung und Biegemaschine.
CH695106A5 (de) * 2001-01-23 2005-12-15 Fischer Reinach Ag Verfahren zur Herstellung einer Schubarmierung in gestützten Betondecken.

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2140283A (en) * 1936-11-21 1938-12-13 Faber Herbert Alfred Monolithic slab floor construction
US3407560A (en) * 1965-10-21 1968-10-29 Hanns U. Baumann Expanded, trussed structural assemblance and method of assembly
US3672022A (en) * 1969-04-01 1972-06-27 Wire Core Dev Corp Wire core structure for sandwich material
US3705473A (en) * 1970-07-20 1972-12-12 Tridilosa Intern Inc Structural slab members

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2140283A (en) * 1936-11-21 1938-12-13 Faber Herbert Alfred Monolithic slab floor construction
US3407560A (en) * 1965-10-21 1968-10-29 Hanns U. Baumann Expanded, trussed structural assemblance and method of assembly
US3672022A (en) * 1969-04-01 1972-06-27 Wire Core Dev Corp Wire core structure for sandwich material
US3705473A (en) * 1970-07-20 1972-12-12 Tridilosa Intern Inc Structural slab members

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4003178A (en) * 1974-05-13 1977-01-18 Robert Charles Douthwaite Open mesh metal panels
US3886646A (en) * 1974-05-30 1975-06-03 John C Broderson Method for constructing an awning
US3957193A (en) * 1974-05-30 1976-05-18 Broderson John C Method for constructing an easily storable awning
US4245926A (en) * 1977-05-17 1981-01-20 Magyar Szenbanyaszati Troszt Welded grid, primarily for securing underground cavities, cavity systems, as well as process for making the grid
US5228613A (en) * 1991-10-01 1993-07-20 Compagnucci - S.P.A. Machine for the automatic and continuous production of wire winding spools
US5235791A (en) * 1992-04-28 1993-08-17 Yaguchi Kenzai Khakko Co., Ltd. Deck plate
US20080172974A1 (en) * 2007-01-19 2008-07-24 Suarez Felix E Interlocking Mesh
US8079197B2 (en) * 2007-01-19 2011-12-20 Suarez Sr Felix E Interlocking mesh
WO2012001460A1 (en) * 2010-06-30 2012-01-05 A.W.M. S.P.A. Method for continous manufacturing of three-dimensional electro -welded metal nets made by stacking of a plurality of flat nets; apparatus used for such manufacturing of three-dimensional metal nets
US20130295340A1 (en) * 2011-01-07 2013-11-07 Areva Np Gmbh Protective system for walls of buildings or containers
CN107717254A (zh) * 2017-11-14 2018-02-23 中交隧道工程局有限公司 一种结点缠绕蝴蝶筋加工装置及方法
US20210254354A1 (en) * 2018-09-10 2021-08-19 Trádartiklar Hillerstorp Ab Mesh panel and a safety barrier system
CN113231580A (zh) * 2021-06-15 2021-08-10 中交第二航务工程局有限公司 一种超大直径环形钢筋网片部品成型工艺

Also Published As

Publication number Publication date
IL38755A0 (en) 1972-04-27
CH536423A (de) 1973-04-30
AT319706B (de) 1975-01-10
IL38755A (en) 1975-05-22
DE2205852A1 (de) 1972-08-31
GB1370986A (en) 1974-10-23
NL7202145A (de) 1972-08-22

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