GB2283031A - Mechanical connection for concrete reinforcing rods - Google Patents
Mechanical connection for concrete reinforcing rods Download PDFInfo
- Publication number
- GB2283031A GB2283031A GB9402789A GB9402789A GB2283031A GB 2283031 A GB2283031 A GB 2283031A GB 9402789 A GB9402789 A GB 9402789A GB 9402789 A GB9402789 A GB 9402789A GB 2283031 A GB2283031 A GB 2283031A
- Authority
- GB
- United Kingdom
- Prior art keywords
- sleeve
- reinforcing rod
- concrete
- rod
- mechanical connection
- 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.)
- Granted
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D39/00—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders
- B21D39/04—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders of tubes with tubes; of tubes with rods
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
- E04C5/08—Members specially adapted to be used in prestressed constructions
- E04C5/12—Anchoring devices
- E04C5/125—Anchoring devices the tensile members are profiled to ensure the anchorage, e.g. when provided with screw-thread, bulges, corrugations
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
- E04C5/16—Auxiliary parts for reinforcements, e.g. connectors, spacers, stirrups
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
- E04G21/12—Mounting of reinforcing inserts; Prestressing
- E04G21/121—Construction of stressing jacks
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
- E04G21/12—Mounting of reinforcing inserts; Prestressing
- E04G21/125—Reinforcement continuity box
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Mechanical Engineering (AREA)
- Reinforcement Elements For Buildings (AREA)
- Mutual Connection Of Rods And Tubes (AREA)
- Conveying And Assembling Of Building Elements In Situ (AREA)
- Joining Of Building Structures In Genera (AREA)
Abstract
A mechanical connection for concrete reinforcing rods lacking a threaded end or the like comprises - a sleeve (11) with a cylindrical hollow body into which is introduced axially the end of the reinforcing rod (7) which has no connecting element; - a coaxial threaded portion (8) on the end of the sleeve (11); - the outer material of the sleeve (11) having undergone deformation by necking-in in the area of the end of the reinforcing rod so that - the material of the ribs (10) on the reinforcing rod also deforms in order connect the reinforcing rod and the sleeve. This deformation may be produced by a piston (21) and die (23) of a jack screwed on to thread (8). After removal of the jack, the further reinforcing rod is attached via thread (8). <IMAGE>
Description
1 2283031 1 MECHANICAL CONNECTION FOR CONCR= REINFORCING RODS The
invention relates to a mechanical connection for concrete reinforcing rods. It concerns a mechanica.1 connection for concrete reinforcing rods, a sleeve with a hollow body, as well as to a device for installing this mechanical connection. The invention also relates to a process for fixing mechanical connections for concrete reinforcing rods.
It will find an application, in particular, in the field of building construction using concrete, such as buildings in a city, or port or road works.
In these fields of application, it is known to use mechanical connections for joining concrete reinforcing rods for continuously ensuring the transmission of a tensile force.
The mechanical connection according to the invention can be used on sites in order to connect parts that have undergone industrial preparation in the workshop with other concrete reinforcing rods available on site.
These'reinforcing rods that are put to use on site may have ends that are rectilinear or take the form of crooks, and the rods have, on their outer surfaces, as is known in the art, ribs or ridges the dimensions of which are fairly irregular, but which are naturally proportioned in relation to the diameter of the reinforcing rod. All these elements are calculated to give the connection a certain strength and, depending on the structure in question, the rods can be of large diameter with large ribs, or of small diameter w1th smaller ribs.
These ribs are generally disposed on the outer surface of the rod, for example helically and with a regular spacing or pitch, which will also depend on the diameter of the rod used and of the degree of strength sought after.
Under certain circumstances, it will sometimes be necessary to connect concrete reinforcing rods embedded in & C= mass of concrete of older construction with new reinforcin- r 1 2 rods in order to extend or modify a works.
T h us in many cases, the concrete reinforcing rods available have not been provided, by virtue of their construction, with a mechanical connecting means such as a threaded portion to facilitate connection or, on the other hand, do have a threaded portion, but one that lie-is been damaged by corrosion or seawater, for example.
In many instances, theri, the ends of rods to be connected, embedded in concrete, are not provided, by virtue of their construction, with adequaLe mechanical connection means. The ends of the unprepared concrete reinforcing rods are completely devoid of threads and it is not easy, therefore, to join Logel.her two concrete reinforcing rods end to end.
Sometimes, it. is riot. that threading has riot been provided on the end of a rod at the time of construction, but rather that this threading cannot be used because it is corroded.
A lack of threading . can also originate from an accident on site; for example, the threaded end of such a connecting rod may have been unfortunately sawn off.
Again, it may prove necessary to connect together, on site, a series of vertical rods with a concret.e slab, such as a floor, produced industrially in the workshop and having, emerging from the concrete, a series of horizontal rods; these rods can be rectilinear or have crook shapes, but it is their ends that will have to be connected on site with vertical concrete reinforcing rods which will form part of the vertical concrete element.
On the site, there is also sometimes a considerable concentration of steel, when the reinforcing rods of the floor and the vertical bars are very close together, and it can be difficult to gain access to thein readily with large tools.
It is knowri, nowadays, for example, lo connect such 3 reinforcing rods using a tubular sleeve which is crimped i..,ith a press. For Lhis purpose, it is necessary to use larIge external jaws which are bulky, as the system,which uses enveloping jaws with the application of external pre-ssure, has to be powerful. Such bulky dimensions are a major drawback when there is a high concentration of steel arid concrete reinforcing rods as, if the two rods are too close together, it is no longer possible to operate swiftly on site.
The pressing members and the tool environment are lieav-, and bulley. The centre to centre distances of the concrete reinforcing rods then have to be large to enable them to be crimped, and we have to reckon, in this case, willi a centre to centre distance of at least fifteen. centimet.res.
The daily output of the operator on Llie site is very small, arid one has to reckon four to eight connections per hour iii the case of very heavy equipment, for example in the order of one huridred and sixty kilogrammes.
It should also be rioted that, when the jaws are used, external pressure being applied, to crimp the two rods end to end, it is not possible to check and test to see if the operation has been carried out correctly, and one thus has to rely on the operator.
The devices and dies used are very heavy as one has to obtain a reaction of the force applied on the tools. The punch, the die and the substantial force applied make it necessary to use a heavy, bullcy outer frame, as the force has to be transmitted to the frame. Pressures of up to two hundred tons, for example, are applied, and it is notl easy to operate swiftly and efficiently with complete security in all crimping operations.
The object of the present invention is to provide a mechanical connection for concrete reinforcing rodT thal remedies Llie aforementioned drawbacks an(] makes it possible to connect a concrele reinforcing rod the end of whiell does 4 not have any connecting means such as a thread. This lack of thread inay be due to corrosion or, qu'Lle s-imply to the fact that no mechanical connection was provided for at the Lime of construction. It may also be that this mechanical connection means has been inadvertently cut off on site.
Another object of the preseriL invention is to provide a mechanical connection for concrete reinforcing rods permitting swift operation on site, hence with light. tools that are easy to handle.
Another object of Llie preserit invention is to provide- a mechanical connection for concrete reinforcing rods making it possible, precisely throtigh the small dimensions of the Lool used, to operate reinforcing rods, Lliat is to say rods that are located ve.1.3 close to one anot.her.
A further object of the present invention is to provide a mechanical connection for concrete reinforcing rods Lliat can be tested by applying thereto, after connection, a stress equal, for example, to 90% of its yield strength.
Yet another object of the present invention is to provide a device for installing a mechanical connection to make it possible to produce tested connections so that all Lhe connections manufactured will be entirely reliable with regard to the quality of crimpingg by necking-in of Llie sleeve on Llie end of the rod.
Another object of the present invention is to be. able to intervene quickly on site in order to connect a member Lliat has been industrially mantifactured, with projecting corierete reinforcing rods, with other concrete reinforcing rods tisable or) site.
For example, all the horizontal slabs can be prepared industrially at the,.:aiiie lime, and then connected with vertical rods which will- all be adjusted to the same g off the ends of the rods.
for example by previously Another advant.age of the device according to the on very highly concentrated concrete invention is that of being very easy to handle arid readily usable on site.
The device is provided with a means of testing the work that has just been carried out in order to obtain proof of the connection being operational, which will naturally be a great advantage since, in the past, it was riot possible to have quality control of the manufactured connection when using the technique of crimping with jaws.
Another, object of the present invention is to provid, a device that makes it possible to achieve a considerable increase in the quantities of connections handled, rising to four hundred a day, as opposed to the forty connections possible at the present time.
According to the present inven-tion, the mechanical connection for concrete reinforcing rods, which will find all application, in particular, in tile field of concrete element construction on site, and which is designed to fit onto a recti.linear or crook shaped end, the reinforcing rod having ribs on its outer surface, is characterized by the fact that-, it comprises:
- a sleeve with a cylindrical hollow body into which is introduced the end of the reinforcing rod which has no connecting element; - a threaded portion on the end of the sleeve; - the hollow body and the threaded portion being coaxial so as Lo be able to connect two reiriforcIng rods placed end to end; - the outer material deformation by necking-in reinforcing rod; of the sleeve having undergone C- in the area of the end of the - the material of the ribs on the reinforcing rod becoming deformed by necking-in and perietratAng the hollow body of the s.leeve; in order connect the reinforcing rod and the sleeve.
The device for installing the mechanical connection on 6 a concrete reinforcing rod the end of which has no connecting. element, designed Lo connect Lwo reinforcing rods end Lo end, is characterized by Lhe fact. that it comprises:
- a double action jack body; - an internally threaded extension tube fitting ont.o Uie threaded porLion or 1.he end of Lhe sleeve and fixed to Mic jack body; - hollow piston of Mie jaelc being displaced between the body and the extension tube; - a necking-in tool disposed on the end of tile pis-Lon and capable of being displaced vertically to deform the external material of the sleeve and to deform the ribs of the concreLe reinforcing rod inside the sleeve, in order to cause connect.jon and to erimp Lhe sleeve by necking-in onio 1-Aie end of the reinforcing rod.
The process for fixing a mechanical conneeLlon for concrete reinforcing rods, usable, in particular, on s-i.L,--, implementing the connection according to the i-n-,,etii-.iori, is characterized by the racL that it consists in:
- covering the end of a concrele r..ejrifore.irx,-, rod having no connecting element, by means of a sleeve; - causing tile sleeve to be necked in and cruslied onto the end of the reinforcing rod through the verLical displacement of a tool; - selecting a material for the sleeve Lliat is more malleable than the material of the reinforcing rod in order to cause the ribs on the rod to be deformed inside the hollow body of the sleeve; - transmitting to the reinforcing., rod the forces induced by the tool.
The present invention will be more readily understood from a reading of Lhe following description, s,;IiLcli is given only by way of illtisLril. ic)n in(] is riot inLended lo limit iL. It is accompanied by 1.he annexed drawings, which form an int,eg.r.<-.tl part t_hereoF.
7 Figure 1 represents the mechanical connection for concrete reinforcing rods according to the inveriLion, applied to a vertical rod and a horizontal rod ending in a crook; Figure 2 is a view of the device according to the invention installing the mechanical connecLion For a concrete reinforcing rod oil a reinforcing rod Lhe end of which has no connecting element; Figure 3 is a cross-sectional view of the sleeve showing, the shape obtained by necking-Lri; Figure 4 shows an alternative of the Lool which, instead or having sLaggered proLuberances, as shown ill figure 2, will have splieres.
We refer now to figure 1, which represents a iiiecliariic.-.il connection for concrete reinforcig rods, glenerally designated by (1). This coricreLe reinforcing rod, known to the man of the art, is widely used nowadays oil sites for reinf(--lrciii,,,, constructions. It will be attempted to connect the concrete reinforcing rod (2) with another reinforcing rod (3), which will be placed coaxially end to end with reinf orciiig rod ( 2). The connection (1) thus ensures transmission of the tensile f orce continuously between reinforcing rod (2) and reinforcing rod (3).
Figure 1 shows single reinforcing rod (3), but this could, for example, form part of a horizontal floor (4) but comprising a plural j ty of reinforcing rods disposed substantially parallel. Each reinforcing rod (3) Can emerge rrom the floor (4) in a sl-.r-tiglit line or, on the contrary, have an end in the shape of a crook (.5), as shown ill figure t 1.
The works further includes a vertical. portion in which will he integrated a series of reinforcing rods (2) disposed parallel. It is thus necessary to connect the end (6) of reinforcing rod (3) to the end (7) of reinforcing rod (2). 11 should he noted Lliat Lhis end (7) of the concrete-- reinforcing rod has no connecting element, that is to say it, li.-xs no 8 externally or internally 1hreaded porLion, as it. xotil.d then be simple for. a wan of connection.
It has been seen that the absence of could originate from manufacture or be due to corrosion, or. to inadvertent sawing on site.
The mechani cal connection ( 1) accoi.(-1i.ri.s. to I'lle invention, when it has been rendered integral wit.h Llie, end (7) of the reinforcing rod using the process according to the invention, can be connected to reinforcing rod (3), for example by screwing. Externally threaded portion (8) provided on the end of the connection can engage in an internally threaded porLi-on (9) provided on end (6).
We refer now to fi.gui.e 2, which shows the concrete reinforcing rod (2) with its end (7) i,;i.Llloiit any corinectin.'s. element and, in particular, a threaded portion. This concrete reinforcing rod, of a sui. table diameter, has, on its outer surface, ribs (10) disposed, for example, in a ci.reulai. or helical fashion. These ri.bs can be irregular, but fac-..il:i-L-ate, as known in Lhe art, the holding of the rei.iifoi. ciiig rods in the concrete when they are made to iiiider,.,,.o substantial tensile stress. These ribs have width arid height dimensions that differ arid a re adapted to the diametel. of the reinforcing rod.
Given the method of construcLi-on, the diameter of the reinforcing rod is not very regular and these ribs are not distributed very precisely over the outer surface of the rod.
The mechanical connection for concrete reinforcIng rods according to the invention comprises a sleeve (11) wi-th a cylindrical. body into which is introduced the end of the reinforcing rod (7) through the orifice (12).
In a preferred form of embodiment, the sleeve (11) has 1.t.s heighl, but the (1.1) the art. Lo effect a iiiec-linii-ic,il- a cylindrical. shape over, a large portion of ill also has inclined faces (13); Llic end or has, beyond the faces (13), a (Aireaded portJon (8),also 1.
9 shown in figure File iiiecileArlic1.1. Of Lhe rods are thus constituted by the cylindrical sleeve ( 11 which fits over the unthreaded end (7) of the rod (2) and which includes a threaded portion (8). It. should he noted that the reinforcing rod (2) and the threaded portion (8) are disposed coaxially along the axis (14) to perutit thp end to end connection of the reinforcing rods (2 and 3).
The different elemerils of Ille contlecLion of course, made of metal, but a material more malleable than the constituent material. of the concrete reinforcing rod (2) could he choseri advantageously for the sleeve. ( 11), the object. of this beirig to cause. deformation of the ribs ( 10) inside the sleeve (11) wheti a. pressure is exerted oil the outer surface of this sleeve. This deúoi.iiiat.loii call be achieved, for example, in the area of the eiid (7) of the reinforcing rod by the necking-in and crushing of 1he sleeve over the end of the reinforcing rod. This call be accomplished, for example, through the vertical displacement of a Lool, generally designated by (15).
Tile material of the ribs of the concrete reinforcing rod is deformed by iiecking-in -rind penetrates the internal area of the sleeve facing Che reinforcing rod in order to contiect the reirifor.cirig rod and Lhe sleeve.
Figure 2 shows the device (15) for installation of Lhe mechanical contieclion (1).
This device is provided with a threaded extension tube (16) comprisirig on one of its ends all externally threpded portion (17) all(] all intervial-ly threaded portion (18) I-1lich is screwed onto the threaded portiorl (8) of the connection ( 1 The exterrially threaded porLion (17) of the tube is fixed iiit.o the end (18) of the body of the hol-low jack used, preferably, oil a double action basis. The body (19) of Lhis jack defines, wilb the extension tiil)- (16),,n area (20) ill which a hollow pl.ston (21) cari be (lisp.l;ic-,ed.
With the end (22) of this piston has- been rendered an necking-in tool fonctionina in a known staggered protuberances or with spheres. These de-,,1r-ctrz; in certain cases, be adjusted according to the diameter C',f the reinforcing rod to be connected. The crimping be adjusted by suitably selecting the number of Figure 4 shows a detail of this tool., eguipred with spheres. Spheres cause deformations (27) on the outer of the sleeve (11). Longitudinal criniping, is canused at the time of the vertical descent of the tool with en,,7a, ag C.
the outer surface of the sleeve, which causes -ment being possible via the sphz----es. This penetration, adjust adjustment is accomplished, for e-zample, by r.qe3-s of i-!-.e screws schematically represented at (28).
When the piston descends in the direction of e-row F, the end of the tool (23) is displaced by a distance D. The base (24) of the tool (023,1 with a ball. and socket articulated element (25). This is, itself, placed on a ball and socket ar'Liciiiated (26) with an intercalated neoprene washer.
The necking-in tool (23) first a-ppi.i.,-s to thelaces.
and then to all of the outer periphery of the slesve (11), a strong pressure communicated b., the piston. Ii this pressure and the simultaneous deformation..)ú Lhe periphery of the sleeve, as shown in figlure- 3, that 4L.L,- end (7) of the concrete reinforcing rod to be connei--Lit..-] te the sleeve. The necking-in tool produces on the oxiLer of the sleeve a sufficient of grooves p,;f er, uniformly distributed over the entire of grooves will, of course, depend on the c f reinforcing rod to be connected.
: h- The necking-in tool, s-.,hen vertically;'lisplace3, distance D, willhollow out grooves on the- cuter pethe socket and, through pressure, will also cause of the ribs (10) of the concrete reinforcing- rod, in the 1 1 11 of its end (7). This deformation will, of course, be made possible through the choice of the constituent material of the sleeve (11), which will be more malleable than the material of the reinforcing rod (7).
The sleeve can thus be connected to the end of the concrete reinforcing rod and 'they can be crimped by neckingin of the sleeve. The material of the ribs of the reinforcil-i, rod at its end (7) will be spread into the inner material of the sleeve to give rise to this connection.
With reference to figure 2, it will be seen that t device (15) is operated by the piston (21) when oil is delivered under pressure. The sleeve (4), which is joined to the extension tube (16), is fixed to the body (19) of the jack. There is produced a reaction on the hollow piston which descends over distance D and causes neckingin. The patterns (10) on the outer surface of the reinforcing rod penetrate the material in the inner area of the sleeve which is morn malleable.
At the end of the operation, the face (24) of the tool comes to bear on the ball and socket articulated el.ciiif---iiL and testing is carried out at the predetermined value, for example 99% of the yield strength of the concrete reinforcing rod. The results of this test will be considered satisfactor-y if, during the raising of the tool from the bottom position to the top position, the socket remains connected Lo the rod.
If necking-in has not been carried out under satisfactory pressure and application conditions, the connection will come apart during the test, and it is beLLer that it should occur at that time to prevent unpleasant surprises later on site. The connection will have to he either re-made or replaced.
It can be seen that the device for installing the mechanical conection that has been described is very compaett. and that it acts vertically on the reinforcing rod. Il. can therefore be used easily in confined spaces or if Chere is a he 12 high concentration of concrete reinforcing rods.
It should be noted that the forces induced by the tool (15) are transmitted to the sleeve (4) arid the reinforcinqrod (3). Use is made of the reaction of the workpiece. The force induced by the jack is transmitted back by the workpiece. This force contained in the workpiece is not dispersed and it is not necessary to have a large press frame to absorb it. The force dispersed by the jack is trans.miLted and wholly taken up by the workpiece. It is the inertia of the workpieces that fully tolerates the force imparted by the jack, which is something that was not possible wiLh prior art devices, as the workpiece did not play this reaciLion role during crimping. The sleeve and the end of the reinforcing rod play a functional reaction role during neck.in,-,-iri and it is possible to work in a vertical position without major too! requirellLents or supports by acting through vertical pressure on the end of the reinforcing rod.
The value of the distance D over which necking-in i,,-ill be carried out will depend, of course, upon the density of the ribs and of the protuberances on the reinforcing rod, as well as on the diameter of the latter. Good results have been obtained, for example, with a distance D of 120 millimeters for a diameter of 40, and a value in the order of 1 to 5 times the diameter could be indicated for this distance D.
The present invention can also be applied to products other than concrete reinforcing rods, for example to smooth rods for crimping.
zn Other applications of the present invention, uithirl the grasp of a man of the art, could also, of course, have been contemplated without thereby departing from its scope.
13
Claims (6)
1. Mechanical connection for concrete reinforcing rods, which will find an application, in particular, in the field of concrete element construction on site, desigpied to fit tD onto a rectilinear or crook shaped end, the reinforcing rod having ribs on its outer surface, characterized by the fact that it comprises:
- a sleeve (11) with a cylindrical hollow body into which is introduced the end of the reinforcing rod which has no connecting element; - a threaded portion (8) on the end of the sleeve (11 - the hollow body and the threaded portion being coaxial so as to be able to connect two reinforcing rods placed end to end; - the outer material of the sleeve undergone deformation by necking-in in the area of the end of the reinforcing rod; - the material of the ribs (10) on the reinforcing rod becoming deformed by necking-in and penetrating the hollow body of the sleeve (11); in order connect the reinforcing rod and the sleeve.
2. Mechanical connection for concrete reinforcing rods, usable, in particular, on sites in the construction -f-ield, according to claim 1, characterized by the fact that inclined. faces (13) are produced on the outer surface of the sleeve (11) between the externally threaded portion and the cylindrical portion of the sleeve.
3. Device for installing the mechanical connection on a concrete reinforcing rod the end of which has no connecting element, designed to connect two reinforcing rods end to end, characterized by the fact that it comprises:
a double action jack body (19); - an internally threaded extension tube ( 16) fitting. onto the threaded portion of the end of the sleeve and fixed to the jack body; 14 - a hollow piston (21) of the jack being displaced between the body (19) and the extension tube (16); - a necking-in tool (23) disposed on the end of the piston and capable of being displaced vertically to deform the external material of the sleeve (11) and to deform the ribs (10) of the concrete reinforcing rod inside the sleeve, in order to cause connection and to crimp the sleeve Ly necking-in onto the end of the reinforcing rod.
4. Device for the installation of a mechanical connection according to claim 3, characterized by the fact that it comprises a ball and socket articulated element (2511 onto which comes to bear the periphery of the necking-In tool in the final stage of descent of the jack, in order to test the connection.
5. Process for fixing a mechanical connection for concrete reinforcing rods, usable, in particular, on site, implementing the connection according to claim 1, characterized by the fact that it consists in:
- covering the end of a concrete reinforcing rod having no connecting element by means of a sleeve; - causing the sleeve to be necked in and crushed onto the end of the reinforcing rod through the vertical displacement of a tool; - selecting a material for the sleeve that is wore malleable than the material of the reinforcing rod in order to cause the ribs on the rod to be deformed inside the hollow body of the sleeve; transmitting to the reinforcing rod the forces induced by the tool.
6. Process for fixing a mechanical connection for concrete reinforcing rods, usable, in particular, on site, according to claim 5, characterized by the fact that, once the connection has been produced, testing is carried out, for example at a predetermined value of the yield strength of the concrete reinforcing rod.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR9312712A FR2711385B1 (en) | 1993-10-20 | 1993-10-20 | Mechanical connection of concrete rods, device for setting up this mechanical connection and method of fixing mechanical connection of concrete rods. |
| EP94490056A EP0716195B1 (en) | 1993-10-20 | 1994-12-09 | Mechanical connection for concrete reinforcing rods, device for installing this mechanical connection and process for fixing mechanical connections for concrete reinforcing rods |
| CA002140196A CA2140196C (en) | 1993-10-20 | 1995-01-13 | Mechanical connection for reinforcing bars, device for placing this mechanical connection and process for fixing the mechanical connection for reinforcing bars |
| JP7030721A JPH08218553A (en) | 1993-10-20 | 1995-02-20 | Mechanical coupling structure of reinforcing bar and execution device of coupling structure and fixing method of coupling structure |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| GB9402789D0 GB9402789D0 (en) | 1994-04-06 |
| GB2283031A true GB2283031A (en) | 1995-04-26 |
| GB2283031B GB2283031B (en) | 1997-03-12 |
Family
ID=27427195
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB9402789A Expired - Lifetime GB2283031B (en) | 1993-10-20 | 1994-02-14 | Method and apparatus for fixing a mechanical connection onto a concrete reinforcing rod |
Country Status (9)
| Country | Link |
|---|---|
| EP (1) | EP0716195B1 (en) |
| JP (1) | JPH08218553A (en) |
| AT (1) | ATE166686T1 (en) |
| CA (1) | CA2140196C (en) |
| DE (2) | DE716195T1 (en) |
| ES (1) | ES2118352T3 (en) |
| FR (1) | FR2711385B1 (en) |
| GB (1) | GB2283031B (en) |
| HK (1) | HK1007341A1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0716195A1 (en) * | 1993-10-20 | 1996-06-12 | DEXTRA EUROPE : Société Anonyme | Mechanical connection for concrete reinforcing rods, device for installing this mechanical connection and process for fixing mechanical connections for concrete reinforcing rods |
| EP0874096A1 (en) * | 1997-04-25 | 1998-10-28 | DEXTRA EUROPE : Société Anonyme | Machine and process for crimping a sleeve on a rebar |
| EP1483463A1 (en) * | 2002-01-21 | 2004-12-08 | Adjustabolt Pty Ltd | A connector for steel reinforcement |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109898746A (en) * | 2019-01-18 | 2019-06-18 | 浙江大学 | A kind of fabricated construction reinforcing steel bar connecting sleeve tube pulp inlet locking device |
| CN114753537A (en) * | 2021-01-28 | 2022-07-15 | 中国建筑第五工程局有限公司 | Superimposed sheet and cast-in-place beam position connecting device |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1534886A (en) * | 1975-10-15 | 1978-12-06 | Ccl Systems Ltd | Joining bodies of concrete |
| EP0098099A2 (en) * | 1982-06-29 | 1984-01-11 | Ccl Systems Limited | Two part connector for concrete reinforcing bars |
| US4559691A (en) * | 1981-03-13 | 1985-12-24 | Dyckerhoff & Widmann Aktiengesellschaft | Device for securing a sleeve on the abutting ends of reinforcing bars |
Family Cites Families (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2050774A5 (en) * | 1969-06-24 | 1971-04-02 | Inst Zavodskoi Tekhn | |
| DE2124433C3 (en) * | 1971-05-17 | 1975-02-13 | Dyckerhoff & Widmann Ag, 8000 Muenchen | Socket connection for ribbed reinforcement steel |
| DE2224633C3 (en) * | 1972-05-19 | 1980-08-21 | Alto 8000 Muenchen Mannhart | Tool for creating a non-positive connection between two ribbed reinforcing bars |
| DE2236503C3 (en) * | 1972-07-25 | 1975-06-26 | Dyckerhoff & Widmann Ag, 8000 Muenchen | Press socket connection for ribbed reinforcing bars |
| US4057882A (en) * | 1973-08-06 | 1977-11-15 | Zeitgeist Ag. | Apparatus for compressing sleeves onto structural rods |
| US4019232A (en) * | 1974-12-04 | 1977-04-26 | Daido Seiko Kabushiki Kaisha | Ram type steel bar coupling apparatus |
| US4119764A (en) * | 1976-11-23 | 1978-10-10 | Neturen Company Ltd. | Helical reinforcing bar for steel cage in concrete structure |
| FR2507232A1 (en) * | 1981-06-09 | 1982-12-10 | Freyssinet Int Stup | Threaded concrete prestress member fastener - has fixed unit braced against all round movable spherically ended roller cage |
| JPS58112622A (en) * | 1981-12-18 | 1983-07-05 | Sukai Ace:Kk | Metallic retainer for terminal of rope and bar steel and method and device for manufacturing it |
| JPH01154818A (en) * | 1987-12-14 | 1989-06-16 | Kawasaki Heavy Ind Ltd | Manufacture of duplex tube |
| DE4018042C2 (en) * | 1990-06-06 | 1998-08-20 | Dyckerhoff & Widmann Ag | Device for connecting two butt-jointed reinforcing bars using a sleeve |
| FR2711385B1 (en) * | 1993-10-20 | 1995-12-15 | Dextra Europe Sa | Mechanical connection of concrete rods, device for setting up this mechanical connection and method of fixing mechanical connection of concrete rods. |
-
1993
- 1993-10-20 FR FR9312712A patent/FR2711385B1/en not_active Expired - Fee Related
-
1994
- 1994-02-14 GB GB9402789A patent/GB2283031B/en not_active Expired - Lifetime
- 1994-12-09 ES ES94490056T patent/ES2118352T3/en not_active Expired - Lifetime
- 1994-12-09 AT AT94490056T patent/ATE166686T1/en active
- 1994-12-09 DE DE0716195T patent/DE716195T1/en active Pending
- 1994-12-09 EP EP94490056A patent/EP0716195B1/en not_active Expired - Lifetime
- 1994-12-09 DE DE69410618T patent/DE69410618T2/en not_active Expired - Lifetime
-
1995
- 1995-01-13 CA CA002140196A patent/CA2140196C/en not_active Expired - Fee Related
- 1995-02-20 JP JP7030721A patent/JPH08218553A/en active Pending
-
1998
- 1998-06-25 HK HK98106571A patent/HK1007341A1/en not_active IP Right Cessation
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1534886A (en) * | 1975-10-15 | 1978-12-06 | Ccl Systems Ltd | Joining bodies of concrete |
| US4559691A (en) * | 1981-03-13 | 1985-12-24 | Dyckerhoff & Widmann Aktiengesellschaft | Device for securing a sleeve on the abutting ends of reinforcing bars |
| EP0098099A2 (en) * | 1982-06-29 | 1984-01-11 | Ccl Systems Limited | Two part connector for concrete reinforcing bars |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0716195A1 (en) * | 1993-10-20 | 1996-06-12 | DEXTRA EUROPE : Société Anonyme | Mechanical connection for concrete reinforcing rods, device for installing this mechanical connection and process for fixing mechanical connections for concrete reinforcing rods |
| EP0874096A1 (en) * | 1997-04-25 | 1998-10-28 | DEXTRA EUROPE : Société Anonyme | Machine and process for crimping a sleeve on a rebar |
| EP1483463A1 (en) * | 2002-01-21 | 2004-12-08 | Adjustabolt Pty Ltd | A connector for steel reinforcement |
| EP1483463A4 (en) * | 2002-01-21 | 2007-05-16 | Adjustabolt Pty Ltd | A connector for steel reinforcement |
| AU2003201395B2 (en) * | 2002-01-21 | 2008-06-26 | Adjusta Pty Ltd | A connector for steel reinforcement |
| AU2003201395C1 (en) * | 2002-01-21 | 2010-05-20 | Adjusta Pty Ltd | A connector for steel reinforcement |
Also Published As
| Publication number | Publication date |
|---|---|
| ATE166686T1 (en) | 1998-06-15 |
| DE69410618T2 (en) | 1999-01-14 |
| HK1007341A1 (en) | 1999-04-09 |
| GB9402789D0 (en) | 1994-04-06 |
| CA2140196A1 (en) | 1996-07-14 |
| EP0716195A1 (en) | 1996-06-12 |
| EP0716195B1 (en) | 1998-05-27 |
| JPH08218553A (en) | 1996-08-27 |
| CA2140196C (en) | 2001-05-29 |
| DE69410618D1 (en) | 1998-07-02 |
| ES2118352T3 (en) | 1998-09-16 |
| DE716195T1 (en) | 1996-12-12 |
| GB2283031B (en) | 1997-03-12 |
| FR2711385B1 (en) | 1995-12-15 |
| FR2711385A1 (en) | 1995-04-28 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 732E | Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977) | ||
| PCNP | Patent ceased through non-payment of renewal fee |
Effective date: 20050214 |
|
| 728V | Application for restoration filed (sect. 28/1977) | ||
| 728Y | Application for restoration allowed (sect. 28/1977) | ||
| PE20 | Patent expired after termination of 20 years |
Expiry date: 20140213 |