US3192963A - Manufacturing lattice frames - Google Patents

Manufacturing lattice frames Download PDF

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Publication number
US3192963A
US3192963A US225791A US22579162A US3192963A US 3192963 A US3192963 A US 3192963A US 225791 A US225791 A US 225791A US 22579162 A US22579162 A US 22579162A US 3192963 A US3192963 A US 3192963A
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United States
Prior art keywords
lattice
frame
gripping
shaft
frame member
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Expired - Lifetime
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US225791A
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English (en)
Inventor
Barbou Jacques
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Davum
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Davum
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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 extent, e.g. lattice girders
    • E04C5/065—Light-weight girders, e.g. with precast parts
    • 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

Definitions

  • This invention relates to a method and apparatus for manufacturing lattice frames for reinforced concrete girders.
  • Framesfor reinforced concrete girders comprising longitudinal frame members connected bya lattice, are well known. Many kinds are available, having similar characteristics and, therefore, substantially an equivalent quality.
  • the method of the invention consists in, after having,
  • the method consists of placing onto reels the spooled materials to be used for the fabrication of the frame members rotary movement of about one-quarter of a turn, said means forming said last named element into a triangular shape and twisting it at the apex of the triangle, so as to form a flat, perpendicular to that of the linker tie, which flat defines the width of the baseof the link; to guide the elements to a welding station, where the frame members Patented July 6, 1965 are welded to the apices of the triangular lattice; guid- 1ng the continuous frame thus made to a saw automatically cutting said frame to any desired length, as determined by a system of appropirate control stops-
  • the spooled materials intended to form the frame members can be steel'wire "or ribbon.
  • the wire can be round or any other cross section.
  • the ribbon can be cold shaped into a V or U by rolling means usingwheels, which means is located between the straightening means and the forming mechanism.
  • the welding is preferably done by electrode grippers.
  • the machine for practicing the preceding method includes a straightening means, preferably using opposed wheels, of known type, giving the steel wires a straight shape; if necessa y, a series -of wheels or rollers cold shaping the ribbon to a V or U cross section; grippers mounted on carriages moved longitudinally back and forth by rods, whereby the wires and ribbons are advanced, step by step; a piston system moving transversely back-and-forth and rotatable and provided, at one end, with a forked nose, between the tongs of which the wire constituting the lattice is held, then pushed by the piston to form a triangle and, simultaneously, to be twisted ap proximately 90; a welding station having as many electrode grippers as the frame has frame members; a sawing stat-ion having a circular saw that automatically advances under electrical control of relays actuated by switches operated by the endless band formed by the frame, said switches being located at two positions in the path of the frame, the first causing the
  • the piston forming the lattice may receive a to-and-fro transverse movement from a jack or from a rotary screw means, and its 90' rotational movement through means of a helical slot provided in the sleeve guiding the piston and a finger provided on said piston and sliding in said slot.
  • FIGURE 1 schematically shows thetop view of the apparatus
  • FIGURE 2 shows the top view of the subcombination that automatically forms the lattice of the frame
  • FIGURE 3 is a detail view showing how the lattice is formed
  • FIGURE 4 shows a cross-section of a link
  • FIGURE 5 showsa portion of the frame as manufactured by the apparat-usof the invention. 7
  • the machine to be described is intended for manufacturing frames for concrete girders, which girders comprise two round steel wires constituting the stress bearing base frame under tension; a ribbon, of U cross section, constituting the upper frame member under compression; and a lattice of round steel wire bentso as to form v a succession of triangular links or ties that secure the different frame members.
  • the apparatus includes three spools 1, 2, and 3, carrying the round steel wires 4, 5, and 6, and a spool 7, carrying the spooled ribbon 8.
  • the steel wires 4 and 5 can be smooth, notched, or
  • wires 4, 5, and 6 pass through a series of opposed straightening wheels 9, of known kind, or of any other kind. Ribbon 8 is simply guided alongside this means.
  • ribbon 3 is cold rolled by a series of shaping rollers 16 for the purpose of giving it a V or U shaped cross section.
  • Steel wires 4, 5, and6 are simply guided past the rollers.
  • the apparatus has a mechanismfor driving, step by step, the wires 4, 5, and 6 and the ribbon 8 and for forming the triangular links of the lattice from steel wire 6. Quite obviously, this part is the very heart of the machine, and requires detailed description.
  • the mechanism includes means for intermittently driving the steel wires and the ribbon.
  • the mechanism includes a frame 11 having end plates 12 and 13 fixed therto. Two parallel horizontal rails 14 located in the same horizontal plane and two parallel horizontal rails 15 located in the same vertical plane are disposed between said side walls.
  • a carriage 16 rolls on rails 14 and carries two grippers 17 and 18. Steel wirs 4- and 5 respectively pass through 2
  • Pulley 31 is connected by belt 32 to another pulley 33 keyed to a hollow shaft 34, which latter can be coupled to motor shaft 35 through a clutch means 36 of any known kind.
  • Lever 39 located at the far end of the shaft, actuates shaft 37.
  • Carriage 45 is connected by rod 47 to fork 43 keyed to shaft 23.
  • Steel wire Pulley 49 connected by belt 50 to pulley 5i that is keyed to shaft 52 revolving in bearings 53, is keyed to shaft 3-0.
  • shaft 52 carries a mitre gear 54 meshing with another such gear 55 keyed to one end of.
  • This shaft is supported by a series of bearing means 57 the jaws of grippers 17, 18, 2t and 46 to close.
  • hollow shaft 34 is coupled with motor shaft 40, pulley 33, which is carried by shaft 34, drives pulley 31 through belt 32 and, therefore, shaft 39.
  • the latter through crankshaft 29, drives rod 28 connected to fork 43 of shaft 23. For this reason, the latter rotates first in one direction and then in the other, thereby causing rods 21, 25, and 47 and carriages 16, 19,, and 45 to move to-andfro.
  • shaft 36 through pulley 49, belt 59, and pulley 51, rotatively drives shaft 52 at a speed corresponding to the frequency of the alternating movement of the carriages.
  • shaft 52 drives shaft 56 and cam 58 at the same speed.
  • the cam periodically operates the piston of master cylinder 61, causing
  • steel wires 4, 5, and 6 and structural member 3 are, at that moment, seized by the grippers and driven by the respective carriages.
  • the length of the advance depends on the separation between the axis of shaft 23 and the pivoting. point of rods 21, 25, and 47 on arm 22 and forks 26 and 48, respectively.
  • Cam 58 is keyed on shaft 56, whereby to free the jaws of the grippers after each advance and to allow them to be drawn back, ready to seize the steel wires and structural member anew, for the next advance.
  • Tho carriages 64 and 65 slide freely on rails 43, 44. These carriages are inter-connected by two rods 66, 67 that pivot on a disk 68 that pivots about a fixed vertical axle 69, whereby the two carriages move the same distance but in the opposite direction, on either side of the axle.
  • Carriage 64 is continuously urged backwards by a spring 70 mounted on rail 43 and pressing, on the one hand, against an adjustable stop '71 fixed to the rail and, on the other hand, against an arm 72 rigidly fixed to the carriage.
  • the rearward movement of carriage 64 is limited by another adjustable stop 73 fixed to rails 43, 44. It can be seen that the maximum separation between the carriages is dependent on this rearward movement, and that the relative movement between the carriages is always symmetrical, thanks to disk 68 and rods 66, 67.
  • Carriage 64 carries a gripper controlled by arm 74 pivoting about axle 75 under the control of a rail 76 fixed .to the piston-rod of a hydraulic control cylinder 77.
  • carriage 65 carries a gripper con-trolled by an arm 78 pivoting about axle 79 under the control of rail part 80 fixed to the piston-rod of hydraulic cylinder
  • Cylinders 77 and 81 are respectively connected by lines 82, 83 to master cylinders 84, 85, whose pistons are actuated, as in the case of master cylinder ,61,by rods 86, 87 controlled by earns 83, 89 keyed to shaft 56 and causing pivoting levers 90 and 91 to oscillate.
  • Shaft 56 is provided with a crankshaft 92, to which is jointed a rod 93 connected by a universal joint 94 (or other similar means) to piston 95 sliding in a sleeve 96 fixed to the frame.
  • Sleeve 96 has a slot 97 comprising two rectilinear portions joined by a helical portion.
  • Theend of piston 95 is equipped with a nose 99 in the shape of a fork, between the tongs of which the wire 6 passes to be formed into the triangular tie or link of the kind desired.
  • Crankshaft 92 then withdraws piston 95, disengaging nose 99 from the formed link or tie and moving it outside of the path of the second bend 6a of the link.
  • Grippers 74, 78 are next opened by master cylinders 84, 85 controlled by earns 88, 89, while cam. 58 causes the other carriage grippers to seize and advance the wires At this moment carriages 64, 65 are withdrawnto their extreme positions by spring 70.
  • Carriage 45 advances wire 6 a sufficient length to form a link, grippers 74, 78 once again grip, and pin 78a is positioned just behind the second bend 6a of the link just formed.
  • Electrode grippers 101, 102, and 103 of any known type, 'spot weld, in .a known manner, these elements, whicharedriven in synchronism with the material advancing arrangement, by any desirable means.
  • the continuous or band frame B thus produced is guided over, step by step, opposite a circular 'saw 104-,
  • frame or band B is guided, after passing by the saw, to a very long horizontal bench 105,.in front of which is a frame 106 for receiving the cut frame.
  • the end of the band reaches a first switch 107, causing either the motor of saw 104 to be switched on or else putting the shaft of the saw into engagement with the shaft of a continuously operating motor.
  • Switch 107 is located at a distance from the saw a trifle less than the desired length of the band, in order to permit the saw to reach operating speed.
  • the saw is caused to advance by a second motor controlled by a relay excited through a second switch 158 located structural member 8, and a lower tensionframing element consisting of two round steel wires 4, 5, whose spacing depends on spread e between the two legs of the link or tie.
  • This spread e is equal to the diameter of nose 99 of piston 95 (FIGURE 3).
  • the nose of course, is removable, and can be replaced by others of different diameters. By increasing spread e it is obviously possible to use three or more frame members under tension.
  • step of shaping includes drawing together said two spaced gripping means as said lattice material is bent; releasing said grip of said gripping means and said engagement of said engagement ,means after said lattice materialis bent, whereby the 4.
  • said lattice frame is cut after said securing step.
  • one of said lengths is a ribbon; forming said ribbon to a desired cross'sectional shape before it is gripped.
  • Apparatus for manufacturing lattice frames for reinforced concrete girders a plurality of first gripping means for separately holding the material to be made into the lattice frame; second means for automatically operating said first means during pre-determined intervals; means for automatically advancing said first means during said pre-determined intervals, at least one of said first means being advanced farther than the others, and for returning said first means to their original position; means for opening said first means during said return; a set of two spaced gripping means cooperatively associated with each of said at least one of said first means, the gripping means of said set being free to move in equal and opposite directions; and means for automatically actuating said set upon release of said grippers cooperatively associated therenormal to the long axis of the lattice element; and means I for continuing the operation in automatic, timed sequence, so as to produce a continuous lattice frame.
  • said means for automatically forming includes third means located substantially at the center of the distance separating said set, for grasping the material held thereby; fourth means for automatically imparting to said third means a movement in a first sense, whereby said material is shaped, and a movement in a second sense, whereby to withdraw said third means; fifth means for opening said set, whereby one forming cycle is finished.
  • said fourth means includes a guide. means for said fourth means, a slot in said guide means, means guided by “said guide means and connected to said third means, and pin means in said means guided by said guide means, for engaging said slot.
  • sixth means rotatably mounted between said first carriage means; and linking means respectively connecting said first carriage means to opposite sides of the rotational axis of said sixth means.
  • the method of producing triangulated lattice elements for lattice frames for reinforced concrete girders which comprises gripping a rod-like element by spaced gripping means, engaging a substantial length of said rodlike element between the gripping means by an engagement means, moving the said engagement means in a direction transverse the axis of said rod-like element to 'bend said element into a shape responding to the sides -of starting a cutting means into motion, and thereafter bringing said cutting means into cutting contact with said lattice frame at a predetermined point in the length of said lattice frame.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Mechanical Engineering (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Wire Processing (AREA)
  • Rod-Shaped Construction Members (AREA)
  • Reinforcement Elements For Buildings (AREA)
US225791A 1961-10-27 1962-09-24 Manufacturing lattice frames Expired - Lifetime US3192963A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR877308A FR1311926A (fr) 1961-10-27 1961-10-27 Procédé de fabrication d'armatures à treillis pour poutrelles en béton armé et machine pour sa mise en oeuvre

Publications (1)

Publication Number Publication Date
US3192963A true US3192963A (en) 1965-07-06

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Application Number Title Priority Date Filing Date
US225791A Expired - Lifetime US3192963A (en) 1961-10-27 1962-09-24 Manufacturing lattice frames

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US (1) US3192963A (xx)
BE (1) BE622684A (xx)
DE (1) DE1552135A1 (xx)
ES (2) ES281286A1 (xx)
FR (1) FR1311926A (xx)
GB (1) GB1006341A (xx)
NL (1) NL128737C (xx)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3310075A (en) * 1964-11-23 1967-03-21 Larkin Sam Automatic machines for forming an intermediate zig-zag wire and welding it to outer parallel wires
US3380484A (en) * 1966-02-23 1968-04-30 R O Kent Corp Apparatus and method for making ventilating units for seat pads
US3486536A (en) * 1963-03-19 1969-12-30 Rene Frantz Apparatus and method for manufacturing structural components

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1777118A1 (de) * 1968-09-10 1971-04-08 Zeller Kg Karl Verfahren und Anlage zur Herstellung von Gittertraegern
FR2462212A1 (fr) * 1979-07-26 1981-02-13 Volkov Sergei Installation de fabrication d'assemblage d'armatures pour beton arme
JPS5964123A (ja) * 1982-10-05 1984-04-12 Shimizu Constr Co Ltd 鉄筋の自動曲げ加工装置
GB2346575B (en) * 1999-02-10 2003-05-14 Structherm Ltd Truss machine

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US340578A (en) * 1886-04-27 Machine for making looped-wire staples
US1951810A (en) * 1931-04-20 1934-03-20 Truscon Steel Co Joist structure
US2624430A (en) * 1949-06-18 1953-01-06 Macomber Inc Fabricated joist
US2792852A (en) * 1953-03-20 1957-05-21 Cedar Rapids Block Co Wire bending apparatus
US3027920A (en) * 1957-03-27 1962-04-03 Cedar Rapids Block Co Wire bending apparatus

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US340578A (en) * 1886-04-27 Machine for making looped-wire staples
US1951810A (en) * 1931-04-20 1934-03-20 Truscon Steel Co Joist structure
US2624430A (en) * 1949-06-18 1953-01-06 Macomber Inc Fabricated joist
US2792852A (en) * 1953-03-20 1957-05-21 Cedar Rapids Block Co Wire bending apparatus
US3027920A (en) * 1957-03-27 1962-04-03 Cedar Rapids Block Co Wire bending apparatus

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3486536A (en) * 1963-03-19 1969-12-30 Rene Frantz Apparatus and method for manufacturing structural components
US3310075A (en) * 1964-11-23 1967-03-21 Larkin Sam Automatic machines for forming an intermediate zig-zag wire and welding it to outer parallel wires
US3380484A (en) * 1966-02-23 1968-04-30 R O Kent Corp Apparatus and method for making ventilating units for seat pads

Also Published As

Publication number Publication date
ES284181A1 (es) 1963-03-01
ES281286A1 (es) 1963-03-01
GB1006341A (en) 1965-09-29
FR1311926A (fr) 1962-12-14
NL128737C (xx) 1970-03-15
DE1552135A1 (de) 1969-09-25
BE622684A (xx)

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