Classifications

• • 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

Definitions

• the present invention regards a device for supporting longitudinal bars in machines for manufacturing metal cages, in particular for reinforced concrete.
• metal cages are used, often cylindrical shaped, constituted by a series of longitudinal iron bars, outside which is placed a rod spiral-wound on the same bars, according to a suitably predetermined pitch.
• the longitudinal bars are distributed according to a suitable geometrical profile, usually cylindrical; nevertheless examples of piles and pillars having different geometries are not lacking, for example asymmetrical, elliptic, prismatic and the like.
• patent EP 0035477 illustrates a machine for manufacturing cages with spiral-winding comprising a driving flange and a freely sliding flange carried by a trolley which can move in front of the driving head, both flanges being prearranged to support the longitudinal bars in predetermined positions.
• the bars are rotated by the aforesaid flanges, while the metal wire, unwound from a lateral coil and brought in longitudinal motion, progressively spiral-winds about the same bars.
• patent IT 1216960 discloses the use of rotating members constituted by disks provided with holes arranged at various radial distances from the cage forming longitudinal axis, coinciding with the machine rotation axis, for the insertion of the longitudinal bars.
• the longitudinal bars are associated with the aforementioned holes of the rotating members by means of suitable sleeves.
• Patent US 3,579,259 illustrates an analogous support system for the bars wherein the rotating members are constituted by disks having a series of radial eyelets, regularly distanced, designed to be engaged by the longitudinal bars.
• the bars are fastened in the desired position by means of suitable blocking members.
• the support system for the bars illustrated in patent appl ication UD2004A000095 belongs to the same typology.
• Patent application PS2001A000012 illustrates a different support modality for the longitudinal bars wherei n th e rotati ng m em bers a re provid ed with a n interchangeable ring on which the bar insertion sleeves can be applied, in different positions.
• cages with longitudinal bars having a suitably folded end In the specified field, the need is felt for manufacturing cages with longitudinal bars having a suitably folded end.
• the use of cages of this type is required, for example, to better distribute the weight of the cage, or to prevent a sinking of the same cage in the ground, due to its own weight, which would enable harmful corrosion phenomena.
• the use of bars with the folded end is useful for safety reasons, to prevent accidental injuries of the operators on the sharp ends protruding from the bars.
• the task of the present invention is that of solving the aforementioned problem, devising a method and a device that allow to operate in an optimal way the support of the longitudinal bars in machines for manufacturing metal cages for reinforced concrete and the like, in particular enabling the mounting of bars having at least one folded end.
• a further scope of the present invention is that of providing a device that allows to orient in the desired manner the aforesaid folded end of the longitudinal bars.
• a further object of the invention is that of devising a support device for bars having a simple conception, a securely reliable functioning and versatile use, as well as relatively economic cost.
• FIGS. 1 and 2 respectively show a prospective view, from various angulations, of the support device for bars according to the present invention
• FIGS. 3 and 4 respectively show a prospective view, from various angulations, of a detail of the device in hand;
• FIGS. 5 and 6 respectively show a prospective view, from various angulations, of a different embodiment of the same device.
• the support device for longitudinal bars 2 in a machine for manufacturing metal cages, in particular for the reinforcement of piles, reinforced concrete pillars and the like, is indicated in its entirety with 1 .
• the bars 2 have a suitable folded end 20.
• the metal cage to be manufactured is constituted by a series of longitudinal bars arranged parallel and made integral, according to the predetermined geometry, by means of a metal wire spiral-wound on the same bars, according to a suitable predetermined pitch.
• the bars suitable to shape the metal cage are arranged according to a circular transverse profile, so as to determine the manufacturing of a cylindrical pile.
• the support device 1 provides a rotating member 3 suitable to support the longitudinal bars 2 in the fastening positions for the formation of the cage.
• Such a rotatable support member 3 is suitable to be actuated in rotation by a suitable motor member, according to the axis of the forming cage, in order to put in rotation the longitudinal bars 2 during the formation of the cage.
• the rotatable support member 3 comprises a disk 30 suitable to be arranged on a plane orthogonal to the cited axis of the forming cage.
• the disk 30 has a series of slots 31 extended in radial direction and angularly distributed in a regular manner.
• the disk 30 is suitable to carry, at the slots 31 , a plurality of bushings or sleeves 4 suitable to receive the longitudinal bars 2.
• the sleeves 4 are suitable to be fastened in adjustable positions respectively at the radial slots 31 of the disk 30, through respective connection members 5.
• the sleeves 4 are made from a first element 41 and a second element 42 having a complementary shape, suitable to be associated with each other in a way as to conjointly define, in the position of reciprocal un ion , a tubular open ing 40 for the passage of the bar 2 to be supported.
• first and second element 41 , 42 of the sleeves 4 are constituted for example by trolley-shaped prismatic bodies, respectively having a first channel 43 and a second channel 44.
• the channels 43, 44 have equal sem icircular profile in a way as to constitute, in the position of reciprocal union of the elements 41 and 42, a cylindrical tubular opening 40.
• the channels 43, 44 it is possible to provide that the channels 43, 44 to have a different shape, so as to define a tubular opening for the passage of the bar 2 with a different profile, as an example prismatic.
• the channels 43, 44 are made differently from each other or otherwise that the tubular opening for the passage of the bar 2 is made by one only channel, shaped in a first trolley element 41 , closed by a covering element made by the second element 42.
• the trolley elements 41 , 42 are suitable to be tightened, in the position of reciprocal union, between a couple of plates 45 fastened by means of screw means 46.
• connection member 5 is constituted by a couple of plates 51 , 52 suitable to be vice-tightened on the disk 30 of the rotatable support member 3 through a screw member 50 that crosses in mounting position a relative radial slot 31 .
• a first plate 51 is integral with the first trolley element 41 of the sleeve 4 and rests in mounting position on a side of the disk 30, while the second plate 52 is free and rests in mounting position on the opposite side of the disk 30.
• the rotatable support member 3 comprises a ring 32 provided with circumferential slots 33.
• a rotatable support m e m b e r 3 i s of the type illustrated in patent application PCT/IB2009/050692 As described in such a patent application, it is possible to provide that the ring 32 is realized by two concentric portions so as to define a continuous circumferential eyelet.
• the ring 32 is arranged on a plane orthogonal to the axis of the forming cage and is appropriately suitable to be constrained to the motion members by means of cross members not represented.
• Such a solution offers the advantage of freeing the central zone of the rotatable support member 3, for example for inserting auxiliary devices on the machine.
• the first and the second element 41 , 42 of the sleeves 4 are constituted in this case by respective angular pieces, with squaring profile, suitable to be inserted in each other with sliding in longitudinal direction .
• the first element 41 has along the longitudinal edges respective guides 47 suitable to allow the sliding insertion of the second element 42.
• the tubular opening 40 for the passage of the bar 2 to be supported has a quadrilateral, in particular square, profile.
• the second element 42 is then fastened to the first element 41 by means of appropriate screw members.
• connection member 5 of the first element 41 of the sleeves 4 to the ring 32 of the rotatable support member 3 is constituted by an arm 53 which extends transversely from the element and has a slot 54 that is suitable to be crossed, in mounting position , by a screw member 55 for fasten ing to the provided circumferential slot 33 of the ring 32.
• the arm 53 is arranged substantially according to a direction diametral to the piece and is mounted radial to the ring 32.
• a rotatable support member 3 is constrained in a known way to the motion members of the machine, on a plane orthogonal to the axis of the forming cage.
• connection member 5 of the first element 41 of the sleeves 4 is constrained in a predetermined position along a relative radial slot 31 of the disk 30 or circumferential slot 33 of the ring 32.
• the connection member 5 of the first element 41 of the sleeves 4 is constrained in a predetermined position along a relative radial slot 31 of the disk 30 or circumferential slot 33 of the ring 32.
• the first element 41 of the sleeves 4 can be radially mounted outwards as well as inwards of the ring 32.
• the first element 41 of the sleeves 4 Once fastened the first element 41 of the sleeves 4, one provides to introduce the bar 2 to be supported, arranging it in the channel longitudinally defined by the same element 41 .
• the bar 2 of the longitudinal reinforcement is more commonly introduced with the folded end 20 arranged frontally. It is to observe that such a folded end 20 of the bar 2 can freely pass, in an introduction step, th rough the rad ial slot 31 of the d isk 30; obviously the passage is completely free, in case of the use of the ring 32 for the support of the bars 2.
• the end of the introduced bar 2, straight or folded, is then fastened to the corresponding disk which is keyed on the mobile head of the machine. In an analogous way one proceeds to the mounting of the successive bars 2.
• the described device attains the scope of making in an optimal manner the support of the longitudinal bars in machines for manufacturing metal cages for reinforced concrete and the like, in particular enabling the mounting of bars having at least one folded end.

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Reinforcement Elements For Buildings (AREA)
• Branching, Merging, And Special Transfer Between Conveyors (AREA)
• Turning (AREA)
• Feeding Of Workpieces (AREA)

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Citations (7)

• 2009
  • 2009-09-11 IT ITBO2009A000578A patent/IT1395571B1/it active
• 2010
  • 2010-09-08 WO PCT/IB2010/054054 patent/WO2011030297A1/en active Application Filing
  • 2010-09-08 EP EP10773982.3A patent/EP2475478B1/en active Active

Patent Citations (7)

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