EP1232030B1 - Device to produce reinforcement cages and relative method - Google Patents
Device to produce reinforcement cages and relative method Download PDFInfo
- Publication number
- EP1232030B1 EP1232030B1 EP00964577A EP00964577A EP1232030B1 EP 1232030 B1 EP1232030 B1 EP 1232030B1 EP 00964577 A EP00964577 A EP 00964577A EP 00964577 A EP00964577 A EP 00964577A EP 1232030 B1 EP1232030 B1 EP 1232030B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- stirrups
- work
- assemblies
- stirrup
- assembly
- 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
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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
- B21F27/125—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 individual stirrups to longitudinal wires
Definitions
- This invention concerns a device and method to produce metal reinforcement cages for structures in reinforced concrete such as beams, pillars or foundations according to the preamble of claims 1 and 12 (see e.g. EP-A- 0 667 195).
- the metal cages used as reinforcement elements in reinforced concrete structures comprise a plurality of longitudinal rods with which stirrups are associated at longitudinal intervals.
- Assembling the cages can be done manually or partly automatically, but in any case it is long and complex, particularly in reciprocally positioning and distributing the stirrups and longitudinal rods, since the assembly workers are obliged to carry out continuous measurements before attaching them, and there is a high probability of error.
- the purpose of the invention is to achieve reinforcement cages comprising at least two longitudinal round pieces attached to the stirrups so as to facilitate the positioning and centering of the stirrups in the assembly step, and also the vertical and transverse positioning of the round pieces to be attached to the stirrups at the correct heights according to the design specifications.
- the device to make reinforcement cages according to the invention comprises at least:
- the feed means consist of drawing means with rollers.
- the feed means consist of gripper means with alternate movement
- the feed means consist of track means, or chains, or other similar or identical systems.
- the work assembly comprises, for each round piece, at least attachment means able to make the round piece solid with one or more stirrups simultaneously, which stirrups are located on each occasion in the positioning means.
- the attachment means in the preferential embodiment, consist of one or more welding assemblies.
- the supporting plane and the work and feed assemblies cooperating with the round pieces have a reciprocal position which can be regulated at least vertically, in order to regulate the attachment height at which the round pieces fed by said work assemblies are attached to the relative stirrups resting on said supporting plane.
- At least one work assembly located on one side with respect to the attachment position of the stirrup is vertically and laterally fixed, while the at least one work assembly located on the other side of the stirrup is movable both laterally and vertically with respect to the fixed supporting plane.
- a preferential embodiment provides that at least one assembly located on one side is fixed vertically and laterally, while the assembly or assemblies located on the other side are movable vertically and laterally.
- the two work assemblies located on the same side of the stirrup are mounted on a common structure suitable to move laterally according to the shape and size of the stirrup, and on which one of the two assemblies is able to move vertically.
- the two assemblies located on the same side are movable vertically and move together; according to a variant, the two assemblies move separately and independently.
- all the work assemblies move together at least vertically with respect to the fixed supporting plane.
- the supporting plane is movable at least vertically with respect to the fixed work assemblies.
- both the supporting plane and at least some of the work assemblies are movable at least vertically.
- the movements of the work assemblies and/or the supporting plane are advantageously managed by a control unit able to memorize the positions which said assemblies and/or said plane assume according to the width and/or height of the stirrup, so that the whole device can be regulated automatically after the stirrup size data has been inserted.
- the work assembly comprises means able to achieve, on each round piece and in a manner correlated to the feed step, one or more loops in relation to the position of the stirrup or stirrups and distanced lengthwise.
- Each loop has a depth substantially mating with the diameter of the rod of the specific stirrup to be connected and is arranged, with respect to the previous and subsequent loop, at an interaxis substantially equivalent to the specification interaxis of the cage.
- the loops are aligned lengthwise on at least one round piece of the cage and have a convex shape facing outwards; they define the seatings in which the stirrups cooperate with and are then attached to said round pieces.
- the specification rods which have to be inserted inside the stirrups in order to complete the cage are deposited.
- the supporting plane has or cooperates with means to keep said rods at least temporarily raised, in order to allow the lower side of the stirrups to pass.
- These lifting means are able to allow the free advance of the stirrups without interfering with them, allowing the rods to be progressively inserted inside the stirrups as the cage is gradually formed and as a growing number of stirrups advance on the supporting plane.
- the device comprises means to make the stirrups in a manner which is functionally and temporally correlated to the formation of the cage on the supporting plane by said work assemblies.
- the means to make the stirrups in a further embodiment, are associated with automatic loading means able to pick up on the prepared stirrups one by one and to put it between the round pieces advancing step-wise, in the seating defined between the loops made thereon.
- the number 10 indicates in its entirety a device to produce reinforcement cages or pre-cages 11 consisting, in this case, of three longitudinal round pieces 13 and at least some of the stirrups 12 which will constitute the finished cage.
- the round pieces 13 are attached outside the relative stirrups 12 and may be auxiliary rods, or specification rods, that is to say, having a structural function as well as connecting the stirrups 12, particularly in smaller cages 11.
- the invention is applied also to cages or pre-cages 11 comprising two, four or more outer round pieces 13, which can cooperate with the upper or lower sides or with the corners of the stirrups 12.
- the device 10 comprises, for each of said longitudinal round pieces 13, feed means 16 and straightening means 21.
- the feed means 16 comprise, in this case, a drawing assembly with rollers 116 able to unwind a longitudinal round piece 13 from a relative roll (not shown here) and to draw it through the respective straightening means 21.
- the straightening means 21 comprise, in this case, two assemblies of rollers, respectively 121a and 121b arranged and acting on two planes orthogonal to each other.
- the feed means comprise alternate motion grippers, chains, tracks or other identical or similar means.
- the device 10 also comprises, for each round piece 13, a work assembly 14 equipped with at least attachment means 18 to attach the round piece 13 and the relative stirrup 12, and a supporting plane 20 arranged downstream of the work assemblies 14 and on which the cage or pre-cage 11 is progressively formed.
- the supporting plane 20 extends at least as far as a position below the attachment means 18 so as to constitute a lower supporting element for the stirrups 12 as they are positioned one after the other in the welding or tying position.
- the attachment means 18 for each round piece 13 comprise at least a welding element 118 able to move from an inactive position, wherein it is distant from the relative round piece 13, to an active position wherein it approaches the round piece 13 to attach it to the stirrup 12.
- each welding element 118 cooperates with a pressure element 15 which intervenes in the welding step, holding the stirrup in a very close position to the relative round piece 13 and facilitating an efficient and long-lasting weld.
- Each welding element 118 is also associated with at least a guide and centering element 34 able to cooperate with a relative stirrup 12 when it is inserted between the round pieces 13 and welded thereto.
- the work assembly 14a located on one side of the stirrup 12, represented by the welding element 118 and the relative guide and positioning element 34, is vertically and laterally fixed, so as to constitute a reference element for the first positioning of the stirrups 12; on the contrary, at least one of the assemblies 14b and 14c located on the other side of the stirrup 12 is movable both laterally and vertically in the direction 35.
- the assemblies 14b and 14c are mounted on a common structure 38 able to move laterally in the direction 36, towards and away from the work assembly 14a located on the opposite side, so as to regulate their position according to the width of the stirrup 12 used; one of the two assemblies, in this case 14b, is movable vertically along the common structure 38 so as to be able to regulate its own position according to the height of the stirrup 12. In this way, two regulation movements only, one lateral and one vertical, allow to adapt the position of all the work assemblies 14a, 14b, and 14c substantially to every shape and size of the stirrups 12.
- the work assemblies 14b, 14c are both movable vertically together by means of vertically moving the common structure 38, whereas, in the embodiment shown in Figs. 5a, 5b, said assemblies 14b and 14c are movable independently from each other.
- the two assemblies 14b and 14c are associated with respective threads 38a and 38b, with opposing direction screw, of a threaded shaft 40 cooperating with a drive motor 39; when the motor 39 is activated, it causes said assemblies 14b and 14c to be displaced in opposite directions to be positioned at the attachment heights of the respective round pieces 13 according to the height of the stirrups 12.
- the work assembly 14 comprises punching means 17 able to make a relative loop 22 on each round piece 13, in a fashion correlated geometrically and temporally to the positioning of the stirrups 12 with respect to the round pieces 13.
- the loop 22 has a convex shape facing outwards and a depth substantially mating with the diameter of the rod of the specific stirrup 12 to be connected.
- the loops 22 made on the round pieces 13 define a seating into which a stirrup 12 is inserted and held in a substantially erect position, orthogonal to the longitudinal round pieces 13.
- the assembly 25 comprises at least bending means 26, means 27 to feed the bar, and shearing means 28.
- the assembly 25 also comprises means 29, in this case of the gripper type, able to pick up each individual formed stirrup 12 one after the other and to transfer it automatically to the position where it is attached to the round pieces 13.
- the means 29, in this case, are able to insert and release the stirrup 12 from above, between the loops 22 present on the round pieces 13 in correspondence with the position where it is attached to the round pieces 13.
- the assembly 25 may provide automatic arms, movable planes, translators or other means suitable for the purpose.
- the action of the means 29 can be carried out by an operator who inserts the stirrups one at a time from above between the loops 22 made on the round pieces 13 and rests them on the plane 20.
- the cycle to form the cage 11 provides that the round pieces 13 are fed forwards, by the relative feed means 16, after the work assemblies 14 and/or the supporting plane 20 have been correctly positioned in height, until they are in correspondence with the punching means 17; then the feed is stopped and the loops 22 are made on the round pieces 13 by the relative means 17.
- the round pieces 13 advance until the loops 22 are positioned in correspondence with the attachment means 18 and in this position at least one stirrup 12 prepared by the assembly 25 is picked up by the means 29 and located between said loops 22.
- the stirrup 12, welded to the round pieces 13, is made to advance on the supporting plane 20 for a step mating with the specification interaxis, and the means 17 are again made to act on the round pieces 13 to form new loops 22.
- Every work assembly 14 also comprises shears means 19 which in this case are arranged downstream of the relative welding element 18.
- the shears means 19 are able to cut the relative round pieces 13 when the cage, or pre-cage, 11 is complete, or when there is a blockage or other problems which require the work cycle to be interrupted.
- the cycle to make the pre-cage 11 provides to position definitive longitudinal rods 30 according to the design specifications already inside the perimeter of the stirrups 12 as the pre-cage 11 gradually forms on the supporting plane 20.
- the invention provides to position the rods 30 keeping them slightly raised with respect to the plane 20 so as to allow the stirrups 12, and particularly the lower side of the stirrups 12, to pass freely below the rods 30.
- rollers 31 of the type with rigid radial blades 32 arranged with their axis substantially orthogonal to the direction of feed of the stirrups 12 on the plane 20.
- the rollers 31 are arranged partly below the surface of the supporting plane 20 so that the radial blades 32, in this case six of them, protrude from the plane 20 and keep the rods 30 raised with respect thereto.
- the first stirrup 12 advancing on the supporting plane 20 can thus pass with its lower side below the rods 30 (Fig. 3a) and, when it meets the first blade 32 (Fig. 3b), it makes it rotate, with the relative roller 31, and can thus continue its advance without interference (Fig. 3c).
- All the stirrups 12 in the pre-cage 11 can advance in this way so that, when the pre-cage 11 is complete, the rods 30 as laid down by the specifications are already inside the perimeter of the stirrups 12. In this way, in a second stage and in a second finishing zone of the cage, it is not necessary to make the complicated operation of inserting the longitudinal rods, which can even reach twelve metres in length, inside the stirrups 12 after the pre-cage 11 has been completed.
- the pre-cage 11 thus made, with the definitive rods 30 already inside, can be translated to an adjacent zone for finishing where the rods 30 can be attached, either manually or partly automatically.
- the round pieces 13 can also be attached to the relative stirrups 12 also in correspondence with the lower or upper side, or in correspondence with the corners. Moreover, supplementary means may be provided able to support the stirrups 12 during the operation to attach them to the longitudinal rods 13. In the event that longitudinal rods 13 are used in the form of bars sheared to size, the shears 19 may be omitted.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Wire Processing (AREA)
Description
- step-wise feed means for the longitudinal round pieces to be attached to the stirrups,
- means to position at least one stirrup at a time,
- at least one work assembly for at least each one of said longitudinal round pieces, and
- a supporting plane on which the cage or pre-cage is progressively formed.
- Figs. 1a-1d
- show schematically, with a view from above, a device to produce reinforcement cages according to the invention in the various steps of the work cycle;
- Fig. 2
- is a prospective view of a cage made with the device shown in Fig. 1;
- Figs. 3a-3c
- show schematic side views of a detail of the device shown in Fig. 1;
- Fig. 4
- shows a preferential embodiment of the invention;
- Figs. 5a-5b
- show another embodiment of the invention, with a variant of Fig. 4;
Claims (19)
- Device to produce reinforcement metal cages comprising a plurality of longitudinal round pieces (13) associated with a plurality of stirrups (12) arranged at intervals along them, said device comprising at least means to feed the round pieces (13), means to position at least one stirrup (12) at a time, at least one work assembly (14) comprising at least attachment means (18) and at least a guide and positioning element (34) for at least each one of said round pieces (13) and a supporting plane (20) on which said cage (11) is progressively formed, there being at least a first work assembly (14a) associated with one side of the stirrup (12) and at least two work assemblies (14b, 14c) associated with the other side of the stirrup, the device being characterized in that said first work assembly (14a) is fixed laterally and vertically with respect to the fixed supporting plane (20), so as to function as a reference position for the stirrups (12) to use, and in that said at least two work assemblies (14b, 14c) are mounted on a common structure (38) the position of which can be regulated laterally with respect to the fixed work assembly (14a), at least one (14b) of said assemblies being movable vertically on said common structure (38) with respect to the other assembly (14c) so that two movements only, one a lateral regulation of the common structure (38) and the other a vertical regulation of the movable work assembly (14b or 14c), allow to position the device with respect to the stirrup (12) to be used.
- Device as in Claim 1, characterized in that said two work assemblies (14b, 14c) are both movable vertically independently of each other.
- Device as in Claim 1, characterized in that said two work assemblies (14b, 14c) are both movable vertically in a correlated fashion.
- Device as in Claim 3, characterized in that said two work assemblies (14b, 14c) are associated to respective threads (38a, 38b) on a threaded shaft (40) associated with a drive motor (39) which, when activated, causes said two work assemblies (14b, 14c) to move vertically in opposite directions.
- Device as in any claim hereinbefore, characterized in that it comprises punching means (17) able to make a plurality of loops (22) along at least one of said longitudinal round pieces (13), the loops (22) having a convex shape facing outwards and defining a seating for the insertion, centering and attachment of at least one of said stirrups (12).
- Device as in any claim hereinbefore, characterized in that said attachment means (18) consist of at least a welding element (118).
- Device as in Claim 6, characterized in that said welding element (118) is associated with at least a relative pressure element (15) to assist the welding.
- Device as in any claim hereinbefore, characterized in that said supporting plane (20) is able to support rods (30) which complete the cage (11), and in that lifting means (31, 32) are provided along said supporting plane (20) to keep said rods (30) raised during the passage of the cage (11) which is progressively formed and to allow said rods (30) to be inserted inside the perimeter of the stirrups (12).
- Device as in any claim hereinbefore, characterized in that it comprises at least an assembly (25) able to make the stirrups (12) one after the other in a manner functionally correlated to the advance of said round pieces (13) at least in said attachment position.
- Device as in Claim 9, characterized in that said assembly (25) comprises at least bending means (26), bar feed means (27) and shearing means (28).
- Device as in Claim 9, characterized in that said assembly (25) comprises means (29) able to pick up the stirrup (12) formed and to place it between the round pieces (13) in correspondence with said attachment position.
- Method to produce reinforcement metal cages comprising a plurality of longitudinal round pieces (13) associated with a plurality of stirrups (12) arranged at intervals along them, comprising at least a step to feed the round pieces (13), a step to position at least one stirrup (12) at a time on a supporting plane (20), an attachment step performed by a work assembly (14) comprising at least attachment means (18) to attach at least each one of said round pieces (13) to said stirrup (12), a first work assembly (14a) being used associated with one side of the stirrup (12) and two work assemblies (14b, 14c) being used associated with a second side of the stirrup (12), the method being characterized in that it provides that said first work assembly (14a) is kept fixed so as to perform a function as a reference position for said stirrups (12), and in that said two work assemblies (14b, 14c) are mounted on a common structure (38) the position of which can be regulated laterally with respect to said fixed work assembly (14a), at least one of said work assemblies (14a, 14b) being movable vertically on said common structure (38), so that two regulation movements only are sufficient to set said assemblies (14a, 14b, 14c) substantially for every shape and size of the stirrups (12) to be used.
- Method as in Claim 12, characterized in that it provides to regulate the vertical position of said work assemblies (14b, 14c) independently of each other.
- Method as in Claim 12, characterized in that it provides to regulate the vertical position of said work assemblies (14b, 14c) together.
- Method as in Claim 12, characterized in that it provides to regulate the vertical position of said supporting plane (20) with respect to said vertically fixed work assemblies (14a, 14b, 14c).
- Method as in Claim 12, characterized in that it provides to make said stirrups (12) by shaping metal round pieces in a manner functionally and temporally correlated to the formation cycle of the cage or pre-cage (11).
- Method as in Claim 16, characterized in that it provides that an assembly (25) makes the stirrups (12) one after the other in co-ordination with the advance of said round pieces (13) and that means (29) pick up said stirrup (12) and place it in correspondence with said attachment position of the relative round pieces (13).
- Method as in Claim 12, characterized in that it provides that the cage (11) is progressively formed on said supporting plane (20) and that the rods (30) to complete the cage are positioned on said supporting plane (20).
- Method as in Claim 18, characterized in that it provides that lifting means (31, 32) keep said rods (30) raised with respect to said supporting plane (20) to allow the passage of the lower side of said stirrups (12) and to allow said rods (30) to be inserted inside the perimeter of the stirrups (12).
Applications Claiming Priority (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IT1999UD000206 IT1310792B1 (en) | 1999-11-16 | 1999-11-16 | Concrete reinforcement metal cage production device |
ITUD990206 | 1999-11-16 | ||
IT2000UD000068 IT1315017B1 (en) | 2000-04-07 | 2000-04-07 | Concrete reinforcement metal cage production device |
ITUD000068 | 2000-04-07 | ||
PCT/IB2000/001477 WO2001036127A1 (en) | 1999-11-16 | 2000-10-16 | Device to produce reinforcement cages and relative method |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1232030A1 EP1232030A1 (en) | 2002-08-21 |
EP1232030B1 true EP1232030B1 (en) | 2004-04-07 |
Family
ID=26332550
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP00964577A Expired - Lifetime EP1232030B1 (en) | 1999-11-16 | 2000-10-16 | Device to produce reinforcement cages and relative method |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP1232030B1 (en) |
AT (1) | ATE263643T1 (en) |
DE (1) | DE60009743T2 (en) |
DK (1) | DK1232030T3 (en) |
ES (1) | ES2219397T3 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN110091113B (en) * | 2019-06-19 | 2024-01-16 | 济南帕蒂克自动化技术有限公司 | Synchronous motion positioning mechanism |
-
2000
- 2000-10-16 ES ES00964577T patent/ES2219397T3/en not_active Expired - Lifetime
- 2000-10-16 DK DK00964577T patent/DK1232030T3/en active
- 2000-10-16 DE DE60009743T patent/DE60009743T2/en not_active Expired - Lifetime
- 2000-10-16 AT AT00964577T patent/ATE263643T1/en active
- 2000-10-16 EP EP00964577A patent/EP1232030B1/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
ES2219397T3 (en) | 2004-12-01 |
ATE263643T1 (en) | 2004-04-15 |
EP1232030A1 (en) | 2002-08-21 |
DK1232030T3 (en) | 2004-08-02 |
DE60009743T2 (en) | 2005-03-31 |
DE60009743D1 (en) | 2004-05-13 |
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