CA2065203A1 - Mechanical connection for reinforcing rods, connecting sleeve permitting the implementation of the said connection, reinforcing rod permitting the implementation of the said connection, and process for producing such a connection - Google Patents
Mechanical connection for reinforcing rods, connecting sleeve permitting the implementation of the said connection, reinforcing rod permitting the implementation of the said connection, and process for producing such a connectionInfo
- Publication number
- CA2065203A1 CA2065203A1 CA002065203A CA2065203A CA2065203A1 CA 2065203 A1 CA2065203 A1 CA 2065203A1 CA 002065203 A CA002065203 A CA 002065203A CA 2065203 A CA2065203 A CA 2065203A CA 2065203 A1 CA2065203 A1 CA 2065203A1
- Authority
- CA
- Canada
- Prior art keywords
- sleeve
- tapped
- sheath
- rod
- rods
- 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.)
- Abandoned
Links
Classifications
-
- 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
-
- 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
- E04C5/162—Connectors or means for connecting parts for reinforcements
- E04C5/163—Connectors or means for connecting parts for reinforcements the reinforcements running in one single direction
- E04C5/165—Coaxial connection by means of sleeves
Abstract
ABSTRACT OF THE DISCLOSURE The invention relates to a mechanical connection for concrete reinforcing rods, a connecting sleeve permitting the implementation of the said connection, a reinforcing rod permitting the implementation of the said connection, and to a process for producing such a connection. It will find an application notably in the field of concrete element construction. According to the invention, the mechanical connection for concrete reinforcing rods wherein the reinforcing rods (1, 2) comprise, on one hand, ribs or fins on their outer surface and, on the other hand, each at least a threaded end (4, 5), designed to be inserted into a connecting sleeve (3) having tapped portions, is noteworthy in that it has means for allowing the end (4) of the first rod (1) to be connected to be passed completely through the sleeve (3), and for allowing the rotation of the sleeve (3) about the end (4) of the said first reinforcing rod (1) and, simultaneously, its screwing, directly or indirectly, onto the end (5) of the second reinforcing rod (2), the said ends (4, 5) of the said first and second rods (1, 2) being placed substantially coaxially, substantially end to end, and rotationally immobile.
Description
20652~3 The invention relates to improvements made to mechanical connections for concrete reinforcing rods. It concerns a mechanical connection for reinforcing rods, a connectin9 sleeve permitting the implementation of the said connection, a reinforcing rod permitting the implementation of the said connection, and a process for producing such a connection.
It will find an application in the field devoted to the construction of concrete buildings, elements or edifices.
In such a field, it is common to use mechanical connections to connect reinforcing rods in order to be able to ensure the transmission of tensile stress in a continuous manner.
For example, document FR-2~626.600 proposes such a mechanical connection for reinforcing rods, wherein the reinforcing rods to be connected comprise at least one threaded end for insertion into a tapped connecting sleeve in order to permit substantially coaxial connection of the two concrete reinforcing rods.
W~en a reinforcing rod sunk in the concrete has to be connected to a rod with an elbow or the longitudinal axis of which is not rectilinear, it is then materially impossible to cause the rod to ratate about the connection axis.
This is, for example, also the case when it is necessary to connect two reinforcing cages each formed of reinforcing rods, disposed parallel to one another, and joined by transverse wires.
While it is conceivable to displace a single rod at the time of connection, it becomes completely impossible in such connecting operations to provide for even slight rotation of rods connected to one another by the pins.
That is why, in certain cases, constructors use crimped sleeves, ~herein connection can be made without having to rotate one of the reinforcing rods.
The latter technique uses a sncket into which are fitted the two ends of the reinforcing rods, the socket then being crimped onto the reinforcing rods by means of a jack and a press.
However, the aforenamed technique is criticized in that it
It will find an application in the field devoted to the construction of concrete buildings, elements or edifices.
In such a field, it is common to use mechanical connections to connect reinforcing rods in order to be able to ensure the transmission of tensile stress in a continuous manner.
For example, document FR-2~626.600 proposes such a mechanical connection for reinforcing rods, wherein the reinforcing rods to be connected comprise at least one threaded end for insertion into a tapped connecting sleeve in order to permit substantially coaxial connection of the two concrete reinforcing rods.
W~en a reinforcing rod sunk in the concrete has to be connected to a rod with an elbow or the longitudinal axis of which is not rectilinear, it is then materially impossible to cause the rod to ratate about the connection axis.
This is, for example, also the case when it is necessary to connect two reinforcing cages each formed of reinforcing rods, disposed parallel to one another, and joined by transverse wires.
While it is conceivable to displace a single rod at the time of connection, it becomes completely impossible in such connecting operations to provide for even slight rotation of rods connected to one another by the pins.
That is why, in certain cases, constructors use crimped sleeves, ~herein connection can be made without having to rotate one of the reinforcing rods.
The latter technique uses a sncket into which are fitted the two ends of the reinforcing rods, the socket then being crimped onto the reinforcing rods by means of a jack and a press.
However, the aforenamed technique is criticized in that it
2~2~3 presents high risks of slippage owing to the fact that crimping is difficult to measure. Furthermore, it is often difficult to implement on si-te as it has to be possible to operate with crimping tools at the point where connection is ~o be made.
Furthermore, it should also be noted that, as regards connections for reinforcing cages, there are sometimes found to be differences in the `levels of the ends of the reinforcing rods, as well as axial differences between rods of two successive cages.
These two sources in accuracy still further complicate the interconnection of such cages.
The object of the present invention is to provide improvements to mechanical connections for reinforcing rods so that they can overcome the aforementioned drawbacks, by permitting, in particular, the connection of reinforcing rods, positioned in relation to one another, and rotationally immobile.
One of the objects of the present invention is to provide a mechanical connection for reinforcing rods that encompasses notably all the advantages in respect of mechanical strength of that described in document FR-2.626.600 and that permits an extension of this technique to the connection of reinforcing cages constituted by several reinforcing rods that are mutuallY positioned and immobilized. However, the improvements made to the mechanical connection can also be applied to the connection of two reinforcing rods that are not subject to the requirements of rotation.
According to the present invention, the mechanical connection for reinforcing rods, which will find an application particularly in the field of concrete element construction, for connecting at least two reinforcing rods, wherein the reinforcing rods comprise, on one hand, ribs or fins on their outer surface and, on the other hand, each at least a threaded end, designed to be inserted into a connecting sleeve having tapped portions, is characterized by the fact thst it has means for allowing the end of the first rod to be connected to be passed completely through the sleeve, and for allowing the rotation of the sleeve about the end of the said first reinforcing rod and, simultaneously, its screwing, directly or 2~65S~3 indirect1y, onto the end of the second reinforcing rod, the said ends of the said first and second rods being placed substantially coaxially, substantially end to end, and rotationally immobile or practically immobile.
The process for producing mechanical connections for reinforcing rods according to the present invention is characterized by the fact that:
- the end of the first reinforcing rod to be connected is passed completely through the sleeve, - the ends of the said first and second rods are placed substantially coaxially, substantially end to end, the said rods being rotationally immobile, - the two reinforc.ing rods are connected by rotating the sleeve about the end of the said first rod and the sleeve is screwed, directly or indirectly, to the end of the other rod to be connected, the said sleeve having at least a first and a second tapped portion corresponding to the said -threaded ends of the rods to be connected.
In this connection, one of the objects of the present invention is to provide a process for the production of mechanical connections for reinforcing rods, and such a mechanical connection, as well as reinforcing rods and sleeves permitting same, which will find an application in particular in the field devoted to the construction of concrete elements or edifices, wherein the reinforcing rods are connected by screwing with the help of tapped connecting sleeves, which make it possible to encompass the advantages of the connection covered by the main patent and which combine the advantages of traditional crimped connections, without inheriting their drawbacks.
This being the case, one of the objects of the improvements of the present invention is to provide a process for the production of a mechanical connection for reinforcing rods, and such a mechanical connection, which can be used with a rod already sunk in concrete, and whatever the configuration of the other rod to be connected, complete rotation of the rods not being necessary.
Another object of the present invention is to provide a mechanical connection sleeve for reinforcing rods that can be applied to the junction of such rods the ends of which are threaded, 2~6~2~3 while permitting this connection without it being necessary to rotate the latter.
A particular application of the sleeve according to the present invention is to be found, notably, in the joining of reinforcing cages in which the rods are ro~ationall!~ immobile by their very construction.
Furthermore, the sleeve of the present invention will make it possible to make up for the different levels of the reinforcing rods forming these cages, as well as certain alignment defects affecting rods in two successive cages.
Furthermore, the present invention enables a mechanical connection for reinforcing rods to be produced wherein the sleeve, via the threaded ends of the reinforcing rods, transmits the compressive stresses. Indeed, according to the connection of the invention, the threads can be placed under traction.
Another object of the present invention is to provide a process for the production of mechanical connections for reinforcing rods that is particularly advantageous as it facilitates assembly and makes it possible to avoid having recourse to crimped sleeves, thus obviating all their drawbacks.
The present invention also provides in this connection a connecting sleeve and/or a reinforcing rod permitting the production of such a mechanical connection for reinforcing rods.
The connecting sleeve according to the invention has a first tapped portion suitable for being screwed, directly or indirectly, onto the end of the said first rod to be connected, and a second tapped portion, suitable for being screwed, directly or indirectly, onto the end of the said second rod to be connected, the said first and second tapped portions being such that, on one hand, at least one of the said first and/or second tapped portions provides a possibility of rotation in relation to the sleeve and, on the other hand, they permit longitudinal deflection to adjust for the threads of the two said ends.
According to one of the forms of embodiment, the said sleeve is constituted by a sheath emprisonin9 a socket permitting the said rotation and the said longitudinal deflection. In another form of 20~52~3 embodiment, the sleeve is constituted by a sheath having a conical bore inside which i5 provided a conical socket in several parts permitting the said rotation and the said longitudinal deflection.
Furthermore, the connection production proGess according to the present invention uses advantageously, but this is not essential, reinforcing rods the ends of which are cold upset and threaded, in order to increase the strength of the mechanical connection.
The present invention will be more readily understood from studying the following description which is given, however, only by by way of illustration, and is not intended to limit it, accompanied by the annexed drawings, which form an integral part thereof.
Figure 1 represents the principle used for connecting two reinforcing rods, according to document FR-2.626.600.
Figure 2 shows a first form of embodiment of the mechanical connection for reinforcing rods according to the present invention.
Figure 3 shows the tapped connecting sleeve designed for the connection as represented in figure 2.
Figures 4a, b, c, d show the different stages in the implementation of the reinforcing rod connection according to the present invention.
Figure 5is a schematic cross-sectional view of a secondform of embodiment of a mechanical connection for reinforcing rods according to the present invention.
Figure ~ is a schematic cross-sectional view of a third form of embodiment of a mechanical connection for reinforcing rods according to the present invention.
Figure 7 is a schematic cross-sectional view of a fourthform of embodiment of a mechanical connection for reinforcing rods according to the present invention.
Figure 8 is a schematic cross-sectional vie~ of a fifth form of embodiment of a mechanical connection for reinforcing rods according to the present invention.
Figures 9a to 9 c illustrate the process for connecting two reinforcing cages, each formed by reinforcing rods positioned in relation to one another and rotationally immobilized, in its different stages, using the connecting principle as illustrated in figure 5.
20~2B3 Figure 10 represents a top view of the connection of figure 6.
Figure 11 is a bottom view of the connection of figure 7.
The invention relates to improvements to mechanical connections for concrete reinforcing rods.
More precisely, the invention relates to a mechanical connection for reinforcing rods, a connecting sleeve permitting the production of the said connection, a reinforcing rod permitting the implementation of the said connection, and a process for producing such a connection.
The present improvements have been developed especially to avoid rotating the reinforcing rods to be connected when implementing the said connection. ~owever, it can also be applied to the production of mechanical connections for reinforcing rods in which it is possible to rotate the said rods.
It should be remembered that, according to document FR-2.626.600, and as illustrated in figure 1, a mechanical connection makes it possible, in particular to ensure the fixing of two reinforcing rods, 1 and 2, end to end, substantially coaxially.
For this purpose, use is made of a tapped connecting sleeve 3, suitable for receiving respectively, on one hand, the threaded end 4 of a first reinforcing rod 1 and, on the other hand, the end 5 of a second reinforcing rod 2.
Although such a connection can be contemplated with reinforcing rods the ends of which are threaded directly in the nominal cross-section of the rod, it may be advantageous to make use of the teachings of aforementioned document FR-2.626.600 to increase the tensile strength of the connection, for the same nominal cross-section of reinforcing rod to be connected.
In this case, the ends 4, 5 of reinforcing rods 1, 2 are reinforced in such a way that they are stronger than the central portion of the bar. Thus, at the time of threading, the end is not rendered fragile in relation to the nominal diameter of the bar.
In particular, if the symbol ~ is used to designate the nominal cross-section of the reinforcing rod to be connected, the upset end will then have an outside diameter d1 such that the cross-sectjon of the reinforcing rod at the bottom of thread d2 is at least equal to or greater than the nominal cross-section ~, as shown in particular 2~6~2~3 in figure 1.
More precisely, prior to threading, ends 4 and 5 of reinforciny rods 1 and 2 to be connected are subjected to cold upsetting respectively; then the upset ends 4 ancl 5 are respectively threaded, in accordance with perfectly conventional threading techniques, notably by cutting.
As regards the threaded and tapped portions, according to the different forms of embodiment proposed below, use will be made either of two identical threads, right-hand or left-hand, or of two opposed threads, one right-hand and the other left-hand.
Generally, as shown in particular in figures2 and 3 reinforcing rods 1, 2 have on their outer surfaces, ribs 6 or fins which thus create protuberances permitting the translational immobilisation of the rod in the concrete when it is sunk therein.
Such reinforcing rods are commonly used and sometimes shaped or bent, but they are also used in producing reinforcing cages constituted by an assembly of reinforcing rods joined together and mutually immobilized by transverse pins. Thus, if it is desired to accomplish the connection of two rods in the prolongation of one another, it is practically impossible, or even quite impossible, to rotate the rod in question.
That is why, according to the present invention, the mechanical connection for reinforcing rods has means for allowing end 4 of the first rod for connection to be passed completely through sleeve 3, and for enabling sleeve 3 to rotate about end 4 of the said reinforcing rod 1, and, simultaneouslYl for it to be screwed, directly or indirectly, onto end 5 of second reinforcing rod 2, the said ends 4, 5 of the said first and second rods, 1, 2, being placed substantially coaxially, substantially end to end, and rotationally immobile, as shown in particular in figures 2 toll , as well as the different successive stages in the production of the connectiOn, as shown in figures 2, 4 and 9.
This characteristic of the connection of the present application is an advantage as it practically no longer, or even no longer in fact, necessitates any relative rotary movement of the two rods.
This being the case, the mechanical connection of the present invention, and more precisely the said means for allowing passage, and then the said rotation, and screwing, take the form of a sleeve -8- ~652~
Furthermore, it should also be noted that, as regards connections for reinforcing cages, there are sometimes found to be differences in the `levels of the ends of the reinforcing rods, as well as axial differences between rods of two successive cages.
These two sources in accuracy still further complicate the interconnection of such cages.
The object of the present invention is to provide improvements to mechanical connections for reinforcing rods so that they can overcome the aforementioned drawbacks, by permitting, in particular, the connection of reinforcing rods, positioned in relation to one another, and rotationally immobile.
One of the objects of the present invention is to provide a mechanical connection for reinforcing rods that encompasses notably all the advantages in respect of mechanical strength of that described in document FR-2.626.600 and that permits an extension of this technique to the connection of reinforcing cages constituted by several reinforcing rods that are mutuallY positioned and immobilized. However, the improvements made to the mechanical connection can also be applied to the connection of two reinforcing rods that are not subject to the requirements of rotation.
According to the present invention, the mechanical connection for reinforcing rods, which will find an application particularly in the field of concrete element construction, for connecting at least two reinforcing rods, wherein the reinforcing rods comprise, on one hand, ribs or fins on their outer surface and, on the other hand, each at least a threaded end, designed to be inserted into a connecting sleeve having tapped portions, is characterized by the fact thst it has means for allowing the end of the first rod to be connected to be passed completely through the sleeve, and for allowing the rotation of the sleeve about the end of the said first reinforcing rod and, simultaneously, its screwing, directly or 2~65S~3 indirect1y, onto the end of the second reinforcing rod, the said ends of the said first and second rods being placed substantially coaxially, substantially end to end, and rotationally immobile or practically immobile.
The process for producing mechanical connections for reinforcing rods according to the present invention is characterized by the fact that:
- the end of the first reinforcing rod to be connected is passed completely through the sleeve, - the ends of the said first and second rods are placed substantially coaxially, substantially end to end, the said rods being rotationally immobile, - the two reinforc.ing rods are connected by rotating the sleeve about the end of the said first rod and the sleeve is screwed, directly or indirectly, to the end of the other rod to be connected, the said sleeve having at least a first and a second tapped portion corresponding to the said -threaded ends of the rods to be connected.
In this connection, one of the objects of the present invention is to provide a process for the production of mechanical connections for reinforcing rods, and such a mechanical connection, as well as reinforcing rods and sleeves permitting same, which will find an application in particular in the field devoted to the construction of concrete elements or edifices, wherein the reinforcing rods are connected by screwing with the help of tapped connecting sleeves, which make it possible to encompass the advantages of the connection covered by the main patent and which combine the advantages of traditional crimped connections, without inheriting their drawbacks.
This being the case, one of the objects of the improvements of the present invention is to provide a process for the production of a mechanical connection for reinforcing rods, and such a mechanical connection, which can be used with a rod already sunk in concrete, and whatever the configuration of the other rod to be connected, complete rotation of the rods not being necessary.
Another object of the present invention is to provide a mechanical connection sleeve for reinforcing rods that can be applied to the junction of such rods the ends of which are threaded, 2~6~2~3 while permitting this connection without it being necessary to rotate the latter.
A particular application of the sleeve according to the present invention is to be found, notably, in the joining of reinforcing cages in which the rods are ro~ationall!~ immobile by their very construction.
Furthermore, the sleeve of the present invention will make it possible to make up for the different levels of the reinforcing rods forming these cages, as well as certain alignment defects affecting rods in two successive cages.
Furthermore, the present invention enables a mechanical connection for reinforcing rods to be produced wherein the sleeve, via the threaded ends of the reinforcing rods, transmits the compressive stresses. Indeed, according to the connection of the invention, the threads can be placed under traction.
Another object of the present invention is to provide a process for the production of mechanical connections for reinforcing rods that is particularly advantageous as it facilitates assembly and makes it possible to avoid having recourse to crimped sleeves, thus obviating all their drawbacks.
The present invention also provides in this connection a connecting sleeve and/or a reinforcing rod permitting the production of such a mechanical connection for reinforcing rods.
The connecting sleeve according to the invention has a first tapped portion suitable for being screwed, directly or indirectly, onto the end of the said first rod to be connected, and a second tapped portion, suitable for being screwed, directly or indirectly, onto the end of the said second rod to be connected, the said first and second tapped portions being such that, on one hand, at least one of the said first and/or second tapped portions provides a possibility of rotation in relation to the sleeve and, on the other hand, they permit longitudinal deflection to adjust for the threads of the two said ends.
According to one of the forms of embodiment, the said sleeve is constituted by a sheath emprisonin9 a socket permitting the said rotation and the said longitudinal deflection. In another form of 20~52~3 embodiment, the sleeve is constituted by a sheath having a conical bore inside which i5 provided a conical socket in several parts permitting the said rotation and the said longitudinal deflection.
Furthermore, the connection production proGess according to the present invention uses advantageously, but this is not essential, reinforcing rods the ends of which are cold upset and threaded, in order to increase the strength of the mechanical connection.
The present invention will be more readily understood from studying the following description which is given, however, only by by way of illustration, and is not intended to limit it, accompanied by the annexed drawings, which form an integral part thereof.
Figure 1 represents the principle used for connecting two reinforcing rods, according to document FR-2.626.600.
Figure 2 shows a first form of embodiment of the mechanical connection for reinforcing rods according to the present invention.
Figure 3 shows the tapped connecting sleeve designed for the connection as represented in figure 2.
Figures 4a, b, c, d show the different stages in the implementation of the reinforcing rod connection according to the present invention.
Figure 5is a schematic cross-sectional view of a secondform of embodiment of a mechanical connection for reinforcing rods according to the present invention.
Figure ~ is a schematic cross-sectional view of a third form of embodiment of a mechanical connection for reinforcing rods according to the present invention.
Figure 7 is a schematic cross-sectional view of a fourthform of embodiment of a mechanical connection for reinforcing rods according to the present invention.
Figure 8 is a schematic cross-sectional vie~ of a fifth form of embodiment of a mechanical connection for reinforcing rods according to the present invention.
Figures 9a to 9 c illustrate the process for connecting two reinforcing cages, each formed by reinforcing rods positioned in relation to one another and rotationally immobilized, in its different stages, using the connecting principle as illustrated in figure 5.
20~2B3 Figure 10 represents a top view of the connection of figure 6.
Figure 11 is a bottom view of the connection of figure 7.
The invention relates to improvements to mechanical connections for concrete reinforcing rods.
More precisely, the invention relates to a mechanical connection for reinforcing rods, a connecting sleeve permitting the production of the said connection, a reinforcing rod permitting the implementation of the said connection, and a process for producing such a connection.
The present improvements have been developed especially to avoid rotating the reinforcing rods to be connected when implementing the said connection. ~owever, it can also be applied to the production of mechanical connections for reinforcing rods in which it is possible to rotate the said rods.
It should be remembered that, according to document FR-2.626.600, and as illustrated in figure 1, a mechanical connection makes it possible, in particular to ensure the fixing of two reinforcing rods, 1 and 2, end to end, substantially coaxially.
For this purpose, use is made of a tapped connecting sleeve 3, suitable for receiving respectively, on one hand, the threaded end 4 of a first reinforcing rod 1 and, on the other hand, the end 5 of a second reinforcing rod 2.
Although such a connection can be contemplated with reinforcing rods the ends of which are threaded directly in the nominal cross-section of the rod, it may be advantageous to make use of the teachings of aforementioned document FR-2.626.600 to increase the tensile strength of the connection, for the same nominal cross-section of reinforcing rod to be connected.
In this case, the ends 4, 5 of reinforcing rods 1, 2 are reinforced in such a way that they are stronger than the central portion of the bar. Thus, at the time of threading, the end is not rendered fragile in relation to the nominal diameter of the bar.
In particular, if the symbol ~ is used to designate the nominal cross-section of the reinforcing rod to be connected, the upset end will then have an outside diameter d1 such that the cross-sectjon of the reinforcing rod at the bottom of thread d2 is at least equal to or greater than the nominal cross-section ~, as shown in particular 2~6~2~3 in figure 1.
More precisely, prior to threading, ends 4 and 5 of reinforciny rods 1 and 2 to be connected are subjected to cold upsetting respectively; then the upset ends 4 ancl 5 are respectively threaded, in accordance with perfectly conventional threading techniques, notably by cutting.
As regards the threaded and tapped portions, according to the different forms of embodiment proposed below, use will be made either of two identical threads, right-hand or left-hand, or of two opposed threads, one right-hand and the other left-hand.
Generally, as shown in particular in figures2 and 3 reinforcing rods 1, 2 have on their outer surfaces, ribs 6 or fins which thus create protuberances permitting the translational immobilisation of the rod in the concrete when it is sunk therein.
Such reinforcing rods are commonly used and sometimes shaped or bent, but they are also used in producing reinforcing cages constituted by an assembly of reinforcing rods joined together and mutually immobilized by transverse pins. Thus, if it is desired to accomplish the connection of two rods in the prolongation of one another, it is practically impossible, or even quite impossible, to rotate the rod in question.
That is why, according to the present invention, the mechanical connection for reinforcing rods has means for allowing end 4 of the first rod for connection to be passed completely through sleeve 3, and for enabling sleeve 3 to rotate about end 4 of the said reinforcing rod 1, and, simultaneouslYl for it to be screwed, directly or indirectly, onto end 5 of second reinforcing rod 2, the said ends 4, 5 of the said first and second rods, 1, 2, being placed substantially coaxially, substantially end to end, and rotationally immobile, as shown in particular in figures 2 toll , as well as the different successive stages in the production of the connectiOn, as shown in figures 2, 4 and 9.
This characteristic of the connection of the present application is an advantage as it practically no longer, or even no longer in fact, necessitates any relative rotary movement of the two rods.
This being the case, the mechanical connection of the present invention, and more precisely the said means for allowing passage, and then the said rotation, and screwing, take the form of a sleeve -8- ~652~
3, the different variants of which are illustrated in figures 2 to 11 , bearing a first tapped portion 7; 17; 27; 37, suitable for being screwed, directly or indirectly, onto end 4 of the said first rod to be connected !, and a second tapped portion 8; 18; 28; 38, suitable for being screwed, directly or indirectly, onto end 5 of the said second reinforcing rod 2.
Furthermore, . ~ such as those in figures 2 to 11, the said first 7; 17; 27; 37 and second 8;
18; 28; 38 tapped portions are designed in the region of the sleeve such that, on one hand, at least one of the said first and/or second tapped portions allows for the possibility of rotation in relation to sleeve 3 and, on the other hand, they permit longitudinal deflection to adjust for the threads of the two said ends 4,5.
Thanks to this arrangement, it will be possible to connect together two reinforcing rods that are completely rotationally immobile, sleeve 4 then making it possible to adjust for any lack of correspondence between the threads of the two ends and, furthermore, to adjust for any level differential between the two said ends.
Figures 2 and 5 show a first type of connection wherein the said sleeve is formed by a sheath 9; 19 the bore of which has a first threaded cylindrical portion 10, 20 constituting the second tapped portion 8; 18, as well as a second portion 14; 24 emprisoning a socket 11; 21.
The said socket 11; 21 has internally a cylindrical portion 12;
22 on which is provided the said first tapped portion 7; 17.
Furthermore, the outer face 13; 23 of the socket permits its rotation in relation to sheath 9; 19 and its longitudinal blocking in relation to the sheath, as well as the said longitudinal deflection.
This being the case, there can advantageously be provided at least one of ends 4 of the first reinforcing rod 1, pre-reinforced by the said upsetting, such that the said sleeve 3 can be screwed completely thereover, despite the presence of the said ribc 6 or fins. This is illustrated, in particular, in figures 4b and 4c.
More precisely, in an alternative form of embodiment, upsetting diameter dll of the end is such that bottom of thread diameter d of the threaded portion of the said end 4 in question is greater 2~6~3 g than or equal to diameter ~Cl of the reinforcing rod incl~ding ribs 6 or fins. This is illustrated, in particular, in figure L~a.
In another alter~ative form of embodiment, instead of designing the upsetting diameter as a function of the diameter of the rod including the ribs, the threading is provided over upset end 4, but this threaded portion will also be extended over at least one part of the ribs 6 or fins of the end of said reinforcing rod l. Thus, the reinforcing rod will have at its end the threaded portion of the upset end prolonged by as much over the said ribs 6 or fins~
In the secondform of embodiment, as illustrated in fi3ure 3, the said cy1indrical portion 10 is prolonged by a truncated cone 14, the larger base 15 of which faces çylindrical portion 10. Socket 11 is, for its part, designed to cooperate with the truncated cone 14 of the sheath, i.e. is has at least one frustoconical portion 13, the conicity of which corresponds to that, 14, of sheath 9, and the larger base 16 of which is smaller in size than that of sheath 9.
It should be noted tha~, if socket 11 and the sleeve are not produced by fcrging, an intermediate ring 16 will then be provided which will permit the introduction of socket 11.
As regards the respective tapped portions 7 and 8 of the sleeve, according to the principle previouslY explained, it must be possible for the sleeve to be passed completelY over the end 4 of the first reinforcing rod 1 to be connected.
Thus, socket 11 bears a tapped portion 7 corresponding to the bottom of thread diameter d2l of the threaded portion of end 4 of the first rod to be connected, this diameter d21, it should be remembered, being greater than or equal to the outside diameter ~C
of the concrete reinforcing rod 1 including the ribs or fins, or else the threaded portion of the upset end 4 of the first rod 1 is prolonged by as much, according to the sleeve, over the said ribs or fins 6.
Furthermore, also to permit complete passage over the first reinforcing rod, the said second tapped portion 8 must be at least equal to or greater than the first tapped portion 7.
In other words, the threaded portion of end 4 of the first reinforcing rod 1 is equal to or less than that of end 5 of the second reinforcing rod 2 (d21 > d22).
20S~3 However, advantageOu51y, to facilitate the putting into place of the connection, the threaded portion and/or the upset portion of end 5 of the second rod 2 is greater than that of end 4 of the said first rod 1, as illustrated in particular in figure 4.
This being the case, to produce a mechanical connection for reinforcing rods, as described in document FR-2.626.60û, cold upsetting is carried out at the different ends 4, 5 of reinforcing rods 1,2 advantageously over a length corresponding to that of the threaded portion.
Furthermore, in order to be able to pass and, in the case in point, screw sleeve 3 completely over end 4 of the first rod 1, either end 4 is upset such that it is greater than or equal to the outside diameter ~Cl including the ribs or fins, or the threaded portion of end 4 is prolonged over at least one portion of the ribs 6 or fins of the said end 4.
The procedure for forming the connection is then carried out according to the different steps, as shown in figures 4 a to 4d and, in particular:
- sleeve 3 is screwed completely over one of the ends to be connected, i.e., in the present case, end 4 of the first rod 1, - ends 4, 5 of the rods 2 to be connected are placed substantially coaxially and substantially end to end, as shown in figure 4c, - the two rods 1, 2 are connected by subsequently unscrewing, at least partially, sleeve 3, which then screws onto the other of the ends to be connected, in the case in point end 5 of the second reinforcing rod 2.
When sleeve 3 has been screwed completely onto end 4 of rod 1, in accordance with the characteristics described above, either sleeve 3 is slidable on end 4 of the reinforcing rod, as the dimensions of the threaded end 4 are less than the dimensions of tapped portion 8 and the dimensions of tapped portion 7 are greater than the cross section ~C1 of the rod, or the sleeve 3, or more precisely, socket 11, is screwed over the threaded portion extended over ribs 6 of rod 1, as shown in particular in figure 4 b.
After the two ends, 4 and 51 have been placed end to end, when the movement of unscrewing sleeve 3 from rod 1 commences, the 20652~3 threaded portion 4 will engage with tapped portion 7, and threaded portion 5 will engage with tapped portion 8.
The relative mobility between socket 11 and sheath 9 will permit the automatic adaptation and matching of the threads, at the sarne time maintaining the two ends 4 and 5 in abutment, and without absolutely necessitating the rotation, even slightly, of the two rods in relation to one another.
Once this adaptation to the thread has been made, the screwing of socket 11 onto end 4 and of sheath 8, 9, 10 onto end 5 will be synchronized, any difference in this thread pitch being compensated for by relative rotation of the two truncated cones, 13 and 14.
When the connection has been installed, i.e. when the ends 4 and 5 are respectively screwed into the tapped portions 7 and 8, the connecticn is tightened until the socket 11 is locked longitudinally and prevented from sustaining any deflection in relation to the sheath, by blocking the two truncated cones 13, 14. This is obtained, for example, by relatively positioning end 5 in abutment in relation to socket 11, as shown, in particular, in figure 5d.
In this respect, it should be noted that the said socket 11 and sheath 9 advantageously have independent gripping means enabling the connection to be tightened.
Such a connection will permit the joining of reinforcing cages wherein the rods are rotationally immobilized in relation to one another in the same cage and whereof rotation is impossible from one cage to another.
By way of a non-limitative example, for the purpose of connecting HA50 high adherence concrete reinforcing rods, the end 4 of the first rod l was subjected to upsetting, to enable an M56 threaded portion to be produced, while the second rod, 2, was subjected to upsetting to enable its end to be provided with an M64 thread.
Figure 5 shows an otherform of embodiment similar to that illustrated in figure 3.
In this case, sleeve 3 is constituted by a sheath 19 having two cylindrical faces, numbered 20 and 23. More precise~y, the said tapped cylindrical portion 20 is prolonged by a second, smooth cylindrical portion 23 defining a shoulder 25 in sheath 19 and the outside dimensions of which coincide with those of the said socket 21 to allow the said rotation.
~0652~3 Furthermore, as illustrated in particular in figure 5~ the said first cylindrical portion 20 comprises a removable internal ring 26 capable of being immobilized in the slleeve, and more precisely in sheath lg, the dimensions of which are such as to allow the inclusion in sheath l9, notab!y in the region of face 23, of the said socket 21.
The process for manufacturing such a connection is very similar to that described previously, i.e.:
~ end 4 of the first rod 1 to be connected is passed completely through sleeve 3 and, notably sheath 19, - socket 21 is screwed, via the tapped portion 17, provided internally in the bore of socket 21, onto end 4, - intermediate ring 26 is screwed onto end 5, via the said second tapped porticn 18, provided internallY in the bore of ring 26, - ends 4, 5 of the said first and second rods, 1, 2, are placed substantially coaxially, and substantially end to end - the two reinforcing rods, 1, 2 are connected by rotating sheath 19 about end 4, 21 and sheath 19 is screwed onto end 5 of the other rod via intermediate ring 26 and its corresponding external threaded portion.
Furthermore, the positioning of the said ends of the first and second reinforcing rods is adjusted by rotating at least one of the two said first and/or second tapped portions and the said tapped portion is blocked in the sleeve when the connection is screwed.
During screwing, if the two threads of the threaded portions of ends 4 and 5 are not matched, this is compensated for through the said rotation allowed socket 21 in sleeve 19.
When sleeve 1g has finished being screwed onto end 5, ring 26 comes into abutment with socket 21, locking and immobilizing the latter. Connection is thus achieved.
Figures 9a to 9 c illustrate the process producing a connection that has just been described and show, in particular, the possibility of adjusting for gaps between rods at different levels.
In this connection, the reference numbers concernjns the first 20~5203 connection on the left-hand side of the drawing correspond to those of the preceding description, while the other two rods have respectively the same numbers bearing prime and second signs.
Figure gc shows the connection of the two rods 1' and 2"
wherein the ends 4 and 5 are in abutment with one another. On the other hand, more significant gaps between ends are illustrated in the case of connections 1-2 and l'-2'.
At shoulder 25 will advantageously be provided a rounded shape permitting good stress distribution. In addition, the contact of socket 21 on intermediate ring 26 ensures that the compressive stresses are taken up and enables the sleeve to be locked.
Furthermore, it is to be noted that a lock-nut can be provided, notably as illustrated in figure 6, which will enable the threads to be placed under traction, by the tightening of the lock-nut, to transmit the compressive stress.
For this purpose, there must be abutting contact, at the ends of the reinforcing rods, or at the portions screwed thereonto, 21, 26, this being after tightening the lock-nut.
With regard to locking, to enable the different elements to be tightened, the connection, and more precisely sheath l9 and intermediate ring 26 have independent gripping means enabling the connection to be tightened.
Furthermore, taking account of the different relative movements of the elements possible, tightnening will be facilitated by choosing the threads as follows:
- end 4 of first reinforcing rod 1: left-hand thread, - end 5 of second reinforcing rod 2: left-hand thread, - tapped portion of sheath 19: right-hand thread, - external threaded portion of ring 26: right-hand thread, - tapped portion of ring 26: left-hand thread, - tapped portion of lock-nut: left-hand thread.
Of course, the converse solution could also be adopted, i.e. by replacing the right-hand threads by the left-hand threads, and vice versa.
By implementing such an arrangement, when sheath 19 is screwed, 2~52~3 socket 21 and ring 26 will tend to come together. Indeed, as sheath 19 is screwed, for example, by turning towards the left, intermediate ring 26 is unscrewed in this direction from rod 2, and this ring is brought into abutment on socket 21.
It should be noted that, in the description, with reference to figure 5, there is provided an intermediate ring 26; in this case, the two ends 4 and 5 of the reinforcing rods have identical threading. However, one could contemplate, as for example in the case of figure 2, providing one of ends 5 with a larger diameter and threading.
Furthermore, the arrangement as represented in figure 5 advantageous7y enables adjustment to be made for a certain angle between two reinforcing rods to be connected, and a certain axial deflection of the ends of these two rods.
Indeed, as shown, in particular, in figure ~, by providing the diameter of socket 21 so as to be less than the diameter of the internal tapped portion of sheath 19, and, additionally as a functiuon of the respective lengths of socket 21 and of the said internal tapped portion, if there is an axial disalignment between rods 1" and 2", for example, when sheath 19" is lowered and when one begins screwing it onto ring 26", socket 21 will be located in portion 20" of the sheath, and screwing will commence with an axial disalignment of rods 1" and 2". In proportion as screwing progresses, and thanks to the forms imparted to the socket and to the bore of the sheath, socket 21" will take up position in portion 24" of the sheath, at the same time taking up the angular disalignment and restoring, notablY by deformation of the rod, rod 1" and rod 2" to alignment, as shown in figure sc.
This being the case, the present invention provides other forms of embodiment of mechanical connection, based on the same principle, as illustrated in figures 6, 7 and 8.
In this case, sleeve 3 is constituted by a sheath having a conical bore, 29; 39, inside which is provided a socket 31; 41 in several conical portions, the outer face 33; 43 of which allows it to be rotated and to be longitudinallY locked in relation to sheaths 2~6~2~
29; 39 and the internal bore 32; 42 of which has the said first and second tapped portlons 27, 38; 37, 38, in this case with opposed threads.
Such a sleeve comprises the. said means for allowing the end 4 of the first rod 1 to be passed completely through sheath 29;39 as well as for allowing the sheath 29; 39 to be rotated about the end of the said first rod 1 and, simultaneously, screwed, directly or indirectly, onto end 5 of second reinforcing rod 2. In this case, the ends of the first and second rnds are placed substantially coaxially, substantially end to end, and rotationally immobile.
Furthermore, in accordance with the above description, the said first and second tapped portions 27, 28; 37, 38 must provide for a possibi7ity of rotation in relation to sleeve 3 and permit longitudinal deflection to adiust for the threads of the two said ends 4 and 5 .
To allow this, conical socket 31; 41 placed in the conical bore corresponding to sheath 29; 39 is made in several portions and takes the form, notably, of at least two shell halves 311 and 312; 411 and 412 suitable for being placed on either side of ends 4 and 5 of the said first and second rods 1, 2 and for emprisoning them when they are placed in sheath 2~; 39, as shown, in particular, in figures 11 and 12 in the case of the embodiment of figure ~
The said shell halves 311, 312; 411, 412 have a conical external face complementary to face 33; 43 of sheath 29; 3g. Furthermore, the said shell halves have on the internal portion, in each end area, a tapped portion 351, 35z, 361, 362; 451, 452, ~61, 462.
If it is assumed that end 4 of the first reinforcing rod has a right-hand thread, the said first tapped portion 27; 37 will thus have a right-hand thread and will be substantially constituted by a right-hand tapped portion on each of the shell halves 351, 352; 451, 452. In this case, the other end, 5, of the second reinforcing rod will have a left-hand thread and the said se~ond tapped portion 28;
38 ~ill be substanttally formed by a left-hand tapped portion provided on each shell half 361, 362; 461, 462.
The said tapped portions of the shell halves have technical ~0652~3 characteristics that are adapted to the threaded portions of the said ends so that they can be placed around them and form, as it were, a nut for the threaded ends.
In this respect, the two shell halves 311, 312; 411, 412 are spaced apart by a gap 53, 57 and positioned by adjusting spacers 54;
55; 56 allowing the threads of the two shell halves to be tightened on the threads of the ends of the rods.
Such an arrangemer,t permits the shell halves 31t, 312; 411, 412 to be put into place on the ends 4, 5 of the two rods in question, 1, 2, substantially coaxially, substantiallY end to end and rotationally immobile.
Indeed, the presence of a right-hand thread and of a left-hand thread makes it possible to increase or to decrease the distance between the threads of the first end and of the second end, and whatever their correspondence. In other words, when the ends are positioned opposite one another, a shell half 311; 411 is placed on ends 4 and 5 and the shell half is rotated about the ends to find the position in which the threads 351; 451 coincide with those, 27;
37, of end 4 and threads 361; 461 coincide with those, 28; 38, of end 5.
Then, once this position has been found, the other shell half 312; 412 and adjusting spacers 54; 55; 56 are placed opposite.
Socket 31 is then formed. It then has to be rendered integral with ends 4, 5 and, for this purpose, it is then fitted into sheath 29;
39, which will have been passed previously around end 4.
To allow the shell halves to be locked in the sleeve, hence rotationally and translationally immobilized, in the case shown in figures 6 and 7, the two shell halves 311, 31z further possess an external threaded portion 40 suitable for cooperating with a corresponding tapped portion provided in the bore of sheath 29.
Furthermore, to enable the connection to be tightened, socket 31 and sheath 29 are provided with independent gripping means, notably constituted by points for engagement by any type of spanner, these points being constituted, for example, by orifices or flats.
In the case illustrated in fi~ure 8I the locking of shell halves 206~203 411, 412 in sheath 39 is permitted by a nut 50, suitable for cooperating with a corresponding threaded portion 51 provided externally on sheath 39 which, when it is screwed, will act on the two shell halves 411 and 422 tQ push them towards the interior of sheath 39 and thus form a wedging system.
In the case represented in figures 6 to 8, the different threads are freely determined, with the exception of the internally threaded portions of the shell halves 351, 352; 361, 362; 451, 452, 461, 462.
Indeed, for the same socket, two threaded portions of opposed thread are required on either side: for example, a right-hand thread for rod N~. 1 and threaded portion 35; 45 and a left-hand thread for rod N-. 2 and threaded portion 36; 46.
In the case of the connections represented in figures 6, 7 and 8, their implementation is as follows:
- end 4 of the first rod 1 for connection is passed completely through sleeve 3 and, more precisely, sheath 29; 39, - ends 4, 5, rotationally immobile, of the said first and second rods 1, 2 are placed substantially coaxially, substantially end to end, - the said ends of the first rods and the second rods are positioned by rotating the said first and second tapped portions 7, 8 around the ends, firstly by means of a first shell half and then by positioning the other shell half, - sheath 29; 39 is passed over socket 31; 41 thus formed and sheath 29; 39 is screwed onto socket 31; 41 by means of threaded portion 40, or possibly via nut 50, - the shell halves being thus maintained, they are screwed onto the ends to place the threads under tension, - sheath 29; 39 continues to be screwed until the connection is completely locked and socket 31; 41 is rotationally immobilized in relation to sheath 29; 39.
Other embodiments of the present invention1 within reach of a man of the art, could, of course, be contemplated without thereby departing from the scope of the said invention.
Furthermore, . ~ such as those in figures 2 to 11, the said first 7; 17; 27; 37 and second 8;
18; 28; 38 tapped portions are designed in the region of the sleeve such that, on one hand, at least one of the said first and/or second tapped portions allows for the possibility of rotation in relation to sleeve 3 and, on the other hand, they permit longitudinal deflection to adjust for the threads of the two said ends 4,5.
Thanks to this arrangement, it will be possible to connect together two reinforcing rods that are completely rotationally immobile, sleeve 4 then making it possible to adjust for any lack of correspondence between the threads of the two ends and, furthermore, to adjust for any level differential between the two said ends.
Figures 2 and 5 show a first type of connection wherein the said sleeve is formed by a sheath 9; 19 the bore of which has a first threaded cylindrical portion 10, 20 constituting the second tapped portion 8; 18, as well as a second portion 14; 24 emprisoning a socket 11; 21.
The said socket 11; 21 has internally a cylindrical portion 12;
22 on which is provided the said first tapped portion 7; 17.
Furthermore, the outer face 13; 23 of the socket permits its rotation in relation to sheath 9; 19 and its longitudinal blocking in relation to the sheath, as well as the said longitudinal deflection.
This being the case, there can advantageously be provided at least one of ends 4 of the first reinforcing rod 1, pre-reinforced by the said upsetting, such that the said sleeve 3 can be screwed completely thereover, despite the presence of the said ribc 6 or fins. This is illustrated, in particular, in figures 4b and 4c.
More precisely, in an alternative form of embodiment, upsetting diameter dll of the end is such that bottom of thread diameter d of the threaded portion of the said end 4 in question is greater 2~6~3 g than or equal to diameter ~Cl of the reinforcing rod incl~ding ribs 6 or fins. This is illustrated, in particular, in figure L~a.
In another alter~ative form of embodiment, instead of designing the upsetting diameter as a function of the diameter of the rod including the ribs, the threading is provided over upset end 4, but this threaded portion will also be extended over at least one part of the ribs 6 or fins of the end of said reinforcing rod l. Thus, the reinforcing rod will have at its end the threaded portion of the upset end prolonged by as much over the said ribs 6 or fins~
In the secondform of embodiment, as illustrated in fi3ure 3, the said cy1indrical portion 10 is prolonged by a truncated cone 14, the larger base 15 of which faces çylindrical portion 10. Socket 11 is, for its part, designed to cooperate with the truncated cone 14 of the sheath, i.e. is has at least one frustoconical portion 13, the conicity of which corresponds to that, 14, of sheath 9, and the larger base 16 of which is smaller in size than that of sheath 9.
It should be noted tha~, if socket 11 and the sleeve are not produced by fcrging, an intermediate ring 16 will then be provided which will permit the introduction of socket 11.
As regards the respective tapped portions 7 and 8 of the sleeve, according to the principle previouslY explained, it must be possible for the sleeve to be passed completelY over the end 4 of the first reinforcing rod 1 to be connected.
Thus, socket 11 bears a tapped portion 7 corresponding to the bottom of thread diameter d2l of the threaded portion of end 4 of the first rod to be connected, this diameter d21, it should be remembered, being greater than or equal to the outside diameter ~C
of the concrete reinforcing rod 1 including the ribs or fins, or else the threaded portion of the upset end 4 of the first rod 1 is prolonged by as much, according to the sleeve, over the said ribs or fins 6.
Furthermore, also to permit complete passage over the first reinforcing rod, the said second tapped portion 8 must be at least equal to or greater than the first tapped portion 7.
In other words, the threaded portion of end 4 of the first reinforcing rod 1 is equal to or less than that of end 5 of the second reinforcing rod 2 (d21 > d22).
20S~3 However, advantageOu51y, to facilitate the putting into place of the connection, the threaded portion and/or the upset portion of end 5 of the second rod 2 is greater than that of end 4 of the said first rod 1, as illustrated in particular in figure 4.
This being the case, to produce a mechanical connection for reinforcing rods, as described in document FR-2.626.60û, cold upsetting is carried out at the different ends 4, 5 of reinforcing rods 1,2 advantageously over a length corresponding to that of the threaded portion.
Furthermore, in order to be able to pass and, in the case in point, screw sleeve 3 completely over end 4 of the first rod 1, either end 4 is upset such that it is greater than or equal to the outside diameter ~Cl including the ribs or fins, or the threaded portion of end 4 is prolonged over at least one portion of the ribs 6 or fins of the said end 4.
The procedure for forming the connection is then carried out according to the different steps, as shown in figures 4 a to 4d and, in particular:
- sleeve 3 is screwed completely over one of the ends to be connected, i.e., in the present case, end 4 of the first rod 1, - ends 4, 5 of the rods 2 to be connected are placed substantially coaxially and substantially end to end, as shown in figure 4c, - the two rods 1, 2 are connected by subsequently unscrewing, at least partially, sleeve 3, which then screws onto the other of the ends to be connected, in the case in point end 5 of the second reinforcing rod 2.
When sleeve 3 has been screwed completely onto end 4 of rod 1, in accordance with the characteristics described above, either sleeve 3 is slidable on end 4 of the reinforcing rod, as the dimensions of the threaded end 4 are less than the dimensions of tapped portion 8 and the dimensions of tapped portion 7 are greater than the cross section ~C1 of the rod, or the sleeve 3, or more precisely, socket 11, is screwed over the threaded portion extended over ribs 6 of rod 1, as shown in particular in figure 4 b.
After the two ends, 4 and 51 have been placed end to end, when the movement of unscrewing sleeve 3 from rod 1 commences, the 20652~3 threaded portion 4 will engage with tapped portion 7, and threaded portion 5 will engage with tapped portion 8.
The relative mobility between socket 11 and sheath 9 will permit the automatic adaptation and matching of the threads, at the sarne time maintaining the two ends 4 and 5 in abutment, and without absolutely necessitating the rotation, even slightly, of the two rods in relation to one another.
Once this adaptation to the thread has been made, the screwing of socket 11 onto end 4 and of sheath 8, 9, 10 onto end 5 will be synchronized, any difference in this thread pitch being compensated for by relative rotation of the two truncated cones, 13 and 14.
When the connection has been installed, i.e. when the ends 4 and 5 are respectively screwed into the tapped portions 7 and 8, the connecticn is tightened until the socket 11 is locked longitudinally and prevented from sustaining any deflection in relation to the sheath, by blocking the two truncated cones 13, 14. This is obtained, for example, by relatively positioning end 5 in abutment in relation to socket 11, as shown, in particular, in figure 5d.
In this respect, it should be noted that the said socket 11 and sheath 9 advantageously have independent gripping means enabling the connection to be tightened.
Such a connection will permit the joining of reinforcing cages wherein the rods are rotationally immobilized in relation to one another in the same cage and whereof rotation is impossible from one cage to another.
By way of a non-limitative example, for the purpose of connecting HA50 high adherence concrete reinforcing rods, the end 4 of the first rod l was subjected to upsetting, to enable an M56 threaded portion to be produced, while the second rod, 2, was subjected to upsetting to enable its end to be provided with an M64 thread.
Figure 5 shows an otherform of embodiment similar to that illustrated in figure 3.
In this case, sleeve 3 is constituted by a sheath 19 having two cylindrical faces, numbered 20 and 23. More precise~y, the said tapped cylindrical portion 20 is prolonged by a second, smooth cylindrical portion 23 defining a shoulder 25 in sheath 19 and the outside dimensions of which coincide with those of the said socket 21 to allow the said rotation.
~0652~3 Furthermore, as illustrated in particular in figure 5~ the said first cylindrical portion 20 comprises a removable internal ring 26 capable of being immobilized in the slleeve, and more precisely in sheath lg, the dimensions of which are such as to allow the inclusion in sheath l9, notab!y in the region of face 23, of the said socket 21.
The process for manufacturing such a connection is very similar to that described previously, i.e.:
~ end 4 of the first rod 1 to be connected is passed completely through sleeve 3 and, notably sheath 19, - socket 21 is screwed, via the tapped portion 17, provided internally in the bore of socket 21, onto end 4, - intermediate ring 26 is screwed onto end 5, via the said second tapped porticn 18, provided internallY in the bore of ring 26, - ends 4, 5 of the said first and second rods, 1, 2, are placed substantially coaxially, and substantially end to end - the two reinforcing rods, 1, 2 are connected by rotating sheath 19 about end 4, 21 and sheath 19 is screwed onto end 5 of the other rod via intermediate ring 26 and its corresponding external threaded portion.
Furthermore, the positioning of the said ends of the first and second reinforcing rods is adjusted by rotating at least one of the two said first and/or second tapped portions and the said tapped portion is blocked in the sleeve when the connection is screwed.
During screwing, if the two threads of the threaded portions of ends 4 and 5 are not matched, this is compensated for through the said rotation allowed socket 21 in sleeve 19.
When sleeve 1g has finished being screwed onto end 5, ring 26 comes into abutment with socket 21, locking and immobilizing the latter. Connection is thus achieved.
Figures 9a to 9 c illustrate the process producing a connection that has just been described and show, in particular, the possibility of adjusting for gaps between rods at different levels.
In this connection, the reference numbers concernjns the first 20~5203 connection on the left-hand side of the drawing correspond to those of the preceding description, while the other two rods have respectively the same numbers bearing prime and second signs.
Figure gc shows the connection of the two rods 1' and 2"
wherein the ends 4 and 5 are in abutment with one another. On the other hand, more significant gaps between ends are illustrated in the case of connections 1-2 and l'-2'.
At shoulder 25 will advantageously be provided a rounded shape permitting good stress distribution. In addition, the contact of socket 21 on intermediate ring 26 ensures that the compressive stresses are taken up and enables the sleeve to be locked.
Furthermore, it is to be noted that a lock-nut can be provided, notably as illustrated in figure 6, which will enable the threads to be placed under traction, by the tightening of the lock-nut, to transmit the compressive stress.
For this purpose, there must be abutting contact, at the ends of the reinforcing rods, or at the portions screwed thereonto, 21, 26, this being after tightening the lock-nut.
With regard to locking, to enable the different elements to be tightened, the connection, and more precisely sheath l9 and intermediate ring 26 have independent gripping means enabling the connection to be tightened.
Furthermore, taking account of the different relative movements of the elements possible, tightnening will be facilitated by choosing the threads as follows:
- end 4 of first reinforcing rod 1: left-hand thread, - end 5 of second reinforcing rod 2: left-hand thread, - tapped portion of sheath 19: right-hand thread, - external threaded portion of ring 26: right-hand thread, - tapped portion of ring 26: left-hand thread, - tapped portion of lock-nut: left-hand thread.
Of course, the converse solution could also be adopted, i.e. by replacing the right-hand threads by the left-hand threads, and vice versa.
By implementing such an arrangement, when sheath 19 is screwed, 2~52~3 socket 21 and ring 26 will tend to come together. Indeed, as sheath 19 is screwed, for example, by turning towards the left, intermediate ring 26 is unscrewed in this direction from rod 2, and this ring is brought into abutment on socket 21.
It should be noted that, in the description, with reference to figure 5, there is provided an intermediate ring 26; in this case, the two ends 4 and 5 of the reinforcing rods have identical threading. However, one could contemplate, as for example in the case of figure 2, providing one of ends 5 with a larger diameter and threading.
Furthermore, the arrangement as represented in figure 5 advantageous7y enables adjustment to be made for a certain angle between two reinforcing rods to be connected, and a certain axial deflection of the ends of these two rods.
Indeed, as shown, in particular, in figure ~, by providing the diameter of socket 21 so as to be less than the diameter of the internal tapped portion of sheath 19, and, additionally as a functiuon of the respective lengths of socket 21 and of the said internal tapped portion, if there is an axial disalignment between rods 1" and 2", for example, when sheath 19" is lowered and when one begins screwing it onto ring 26", socket 21 will be located in portion 20" of the sheath, and screwing will commence with an axial disalignment of rods 1" and 2". In proportion as screwing progresses, and thanks to the forms imparted to the socket and to the bore of the sheath, socket 21" will take up position in portion 24" of the sheath, at the same time taking up the angular disalignment and restoring, notablY by deformation of the rod, rod 1" and rod 2" to alignment, as shown in figure sc.
This being the case, the present invention provides other forms of embodiment of mechanical connection, based on the same principle, as illustrated in figures 6, 7 and 8.
In this case, sleeve 3 is constituted by a sheath having a conical bore, 29; 39, inside which is provided a socket 31; 41 in several conical portions, the outer face 33; 43 of which allows it to be rotated and to be longitudinallY locked in relation to sheaths 2~6~2~
29; 39 and the internal bore 32; 42 of which has the said first and second tapped portlons 27, 38; 37, 38, in this case with opposed threads.
Such a sleeve comprises the. said means for allowing the end 4 of the first rod 1 to be passed completely through sheath 29;39 as well as for allowing the sheath 29; 39 to be rotated about the end of the said first rod 1 and, simultaneously, screwed, directly or indirectly, onto end 5 of second reinforcing rod 2. In this case, the ends of the first and second rnds are placed substantially coaxially, substantially end to end, and rotationally immobile.
Furthermore, in accordance with the above description, the said first and second tapped portions 27, 28; 37, 38 must provide for a possibi7ity of rotation in relation to sleeve 3 and permit longitudinal deflection to adiust for the threads of the two said ends 4 and 5 .
To allow this, conical socket 31; 41 placed in the conical bore corresponding to sheath 29; 39 is made in several portions and takes the form, notably, of at least two shell halves 311 and 312; 411 and 412 suitable for being placed on either side of ends 4 and 5 of the said first and second rods 1, 2 and for emprisoning them when they are placed in sheath 2~; 39, as shown, in particular, in figures 11 and 12 in the case of the embodiment of figure ~
The said shell halves 311, 312; 411, 412 have a conical external face complementary to face 33; 43 of sheath 29; 3g. Furthermore, the said shell halves have on the internal portion, in each end area, a tapped portion 351, 35z, 361, 362; 451, 452, ~61, 462.
If it is assumed that end 4 of the first reinforcing rod has a right-hand thread, the said first tapped portion 27; 37 will thus have a right-hand thread and will be substantially constituted by a right-hand tapped portion on each of the shell halves 351, 352; 451, 452. In this case, the other end, 5, of the second reinforcing rod will have a left-hand thread and the said se~ond tapped portion 28;
38 ~ill be substanttally formed by a left-hand tapped portion provided on each shell half 361, 362; 461, 462.
The said tapped portions of the shell halves have technical ~0652~3 characteristics that are adapted to the threaded portions of the said ends so that they can be placed around them and form, as it were, a nut for the threaded ends.
In this respect, the two shell halves 311, 312; 411, 412 are spaced apart by a gap 53, 57 and positioned by adjusting spacers 54;
55; 56 allowing the threads of the two shell halves to be tightened on the threads of the ends of the rods.
Such an arrangemer,t permits the shell halves 31t, 312; 411, 412 to be put into place on the ends 4, 5 of the two rods in question, 1, 2, substantially coaxially, substantiallY end to end and rotationally immobile.
Indeed, the presence of a right-hand thread and of a left-hand thread makes it possible to increase or to decrease the distance between the threads of the first end and of the second end, and whatever their correspondence. In other words, when the ends are positioned opposite one another, a shell half 311; 411 is placed on ends 4 and 5 and the shell half is rotated about the ends to find the position in which the threads 351; 451 coincide with those, 27;
37, of end 4 and threads 361; 461 coincide with those, 28; 38, of end 5.
Then, once this position has been found, the other shell half 312; 412 and adjusting spacers 54; 55; 56 are placed opposite.
Socket 31 is then formed. It then has to be rendered integral with ends 4, 5 and, for this purpose, it is then fitted into sheath 29;
39, which will have been passed previously around end 4.
To allow the shell halves to be locked in the sleeve, hence rotationally and translationally immobilized, in the case shown in figures 6 and 7, the two shell halves 311, 31z further possess an external threaded portion 40 suitable for cooperating with a corresponding tapped portion provided in the bore of sheath 29.
Furthermore, to enable the connection to be tightened, socket 31 and sheath 29 are provided with independent gripping means, notably constituted by points for engagement by any type of spanner, these points being constituted, for example, by orifices or flats.
In the case illustrated in fi~ure 8I the locking of shell halves 206~203 411, 412 in sheath 39 is permitted by a nut 50, suitable for cooperating with a corresponding threaded portion 51 provided externally on sheath 39 which, when it is screwed, will act on the two shell halves 411 and 422 tQ push them towards the interior of sheath 39 and thus form a wedging system.
In the case represented in figures 6 to 8, the different threads are freely determined, with the exception of the internally threaded portions of the shell halves 351, 352; 361, 362; 451, 452, 461, 462.
Indeed, for the same socket, two threaded portions of opposed thread are required on either side: for example, a right-hand thread for rod N~. 1 and threaded portion 35; 45 and a left-hand thread for rod N-. 2 and threaded portion 36; 46.
In the case of the connections represented in figures 6, 7 and 8, their implementation is as follows:
- end 4 of the first rod 1 for connection is passed completely through sleeve 3 and, more precisely, sheath 29; 39, - ends 4, 5, rotationally immobile, of the said first and second rods 1, 2 are placed substantially coaxially, substantially end to end, - the said ends of the first rods and the second rods are positioned by rotating the said first and second tapped portions 7, 8 around the ends, firstly by means of a first shell half and then by positioning the other shell half, - sheath 29; 39 is passed over socket 31; 41 thus formed and sheath 29; 39 is screwed onto socket 31; 41 by means of threaded portion 40, or possibly via nut 50, - the shell halves being thus maintained, they are screwed onto the ends to place the threads under tension, - sheath 29; 39 continues to be screwed until the connection is completely locked and socket 31; 41 is rotationally immobilized in relation to sheath 29; 39.
Other embodiments of the present invention1 within reach of a man of the art, could, of course, be contemplated without thereby departing from the scope of the said invention.
Claims (18)
- The embodiments of the invention in which an exclusive property or privilege is claimed are defined as follows:
l. Mechanical connection for reinforcing rods, which will find an application particularly in the field of concrete element construction, for connecting at least two concrete reinforcing rods (l, 2), wherein the reinforcing rods (l, 2) comprise, on one hand, ribs (6) or fins on their outer surface and, on the other hand, each at least a threaded end (4, 5), designed to be inserted into a connecting sleeve (3) having tapped portions, characterized by the fact that it has means for allowing the end (4) of the first rod (1) to be connected to be passed completely through the sleeve (3), and for allowing the rotation of the sleeve (3) about the end (4) of the said first reinforcing rod (1) and, simultaneously, its screwing, directly or indirectly, onto the end (5) of the second reinforcing rod (2), the said ends (4, 5) of the said first and second rods (1, 2) being placed substantially coaxially, substantially end to end, and rotationally immobile. - 2. Connection according to claim 1, characterized by the fact that the said means take the form of a sleeve (3) bearing a first tapped portion (7; 17; 27; 37) suitable for being screwed, directly or indirectly, onto the end (4) of the said first rod for connection (1) and a second tapped portion (8; 18; 28; 38) suitable for being screwed, directly or indirectly, on the end (5) of the said second reinforcing rod (2), the said first and second tapped portions being such that, on one hand, at least one of the said first and/or second tapped portions provides a possibility of rotation in relation to the sleeve (3) and, on the other hand, that they permit longitudinal deflection to adjust for the threads of the two said ends (4, 5).
- 3. Connection according to claim 2, characterized by the fact that the said sleeve (3) is constituted by a sheath (9; 19) the bore of which has a first cylindrical, threaded portion (10; 20), constituting the said second tapped portion (8; 18) and a second portion (14; 24) emprisoning a socket (11; 21) the external face of which (13; 23) permits its rotation and its longitudinal locking in relation to the sheath (9; 19), as well as the said longitudinal deflection, and in which is provided the said first tapped portion 7; 17).
- 4. Connection according to claim 2, characterized by the fact that the said sleeve (3) is constituted by a sheath (29; 39) having a conical bore, inside which is provided a conical socket (31; 41), in several portions, the external portion (33; 43) of which permits its rotation and its longitudinal locking in relation to the sheath (29; 39), and the internal bore (32; 42) of which has the said first tapped portions (27; 37) and second tapped portions (28; 38) with opposed threads.
- 5. Connection according to claim 1, characterized by the fact that the ends (4, 5) of the first and second rods (1, 2) undergo cold upsetting, the upsetting diameter d11 of the end (4) of the first rod (l) being such that the diameter d21 of the threaded portion of the said end (4) is greater than or equal to the outside diameter .PHI.C1 of the reinforcing rod including the ribs or fins, the upsetting diameter d21 of the end (5) of the second rod (2) being such that the bottom of thread diameter d22 of the threaded portion of the said end (5) is greater than or equal to the outside diameter .PHI.C2 of the rod (2) over the ribs or fins.
- 6. Connection according to claim 3 or 4, characterized by the fact that the said socket (11; 21; 31; 41) and the sheath (9; 19;
29; 39) have independent gripping means enabling the connection to be tightened. - 7. Sleeve for the connection of concrete reinforcing rods allowing the implementation of the mechanical connection according to claim 2, characterized by the fact that it has means for allowing the end (4) of the first rod to be passed completely through the said sleeve (3), as well as for allowing the sleeve (3) to rotate about the end (4) of the said first rod, and simultaneously, to be screwed, directly or indirectly, over the end (5) of the second rod (2), the said ends (4, 5) of the said first and second rods (1, 23 being placed substantially coaxially, substantially end to end, and rotationally immobile.
- 8. Sleeve according to claim 6, characterized by the fact that it has a first tapped portion (7; 17; 27; 37) suitable for being screwed, directly or indirectly, onto the end (4) of the said first rod (1) to be connected, as well as a second tapped portion (8; 18;
28; 38) suitable for being screwed, directly or indirectly, onto the end (5) of the said second rod (2) to be connected, the said first and second tapped portions (7, 8; 17, 18; 27, 28; 37, 38) being such that, on one hand, at least one of the two said first and/or second tapped portions provide a possibility of rotation in relation to the sleeve (3) and, on the other hand, that they allow longitudinal deflection to adjust for the threads of the two said ends (4, 5). - 9. Sleeve according to claim 8, characterized by the fact that it is constituted by a sheath (9; 19) the bore of which has a first, cylindrical, threaded portion (10; 20), constituting the said second tapped portion (8; 18) and a second portion (14; 24), emprisoning a socket (11; 21), the external face (13; 23) of which permits its rotation and its longitudinal locking in relation to the sheath (9;
19), as well as the said longitudinal deflection, and wherein is provided the said first tapped portion (7; 17). - 10. Sleeve according to claim 9, characterized by the fact that the said cylindrical portion (10) is prolonged by a truncated cone (14) the large base (15) of which faces the said cylindrical portion (10) and that the said socket (11) has at least one frustoconical external portion (13) the conicity of which corresponds to that (14) of the sheath (9) and the larger base (16) of which is smaller than that (15) of the sheath (9), as well as a threaded cylindrical internal bore.
- 11. Sleeve according to claim 9, characterized by the fact that the said cylindrical portion (20) is prolonged by a second cylindrical portion (23) defining a shoulder (25) in the sheath (19) and the outside dimensions of which coincide with those of the said socket (21).
- 12. Sleeve according to claim 9 , characterized by the fact that the said first cylindrical portion (10; 20) comprises a removable internal ring (16; 26) capable of being immobilized in the sheath (9; 19) the dimensions of which are such that they permit the inclusion of the said socket (11; 21) in the sheath (9, 19).
- 13. Sleeve according to claim 8, characterized by the fact that it is constituted by a sheath (29; 39) having a conical bore, inside which is provided a conical socket (31; 41), in several portions, the external face (33; 43) of which permits its rotation and its longitudinal locking in relation to the sheath (29; 39) and the internal bore (32, 42) of which has the said first tapped portions (27; 37) and second tapped portions (28; 38) with opposed threads.
- 14. Sleeve according to claim 13, characterized by the fact that the said socket (31; 41) is constituted by at least two shell halves (311, 312, 411, 412) suitable for being placed on either side of the ends (4, 5) of the said first and second rods (1, 2) and for emprisoning them when they are placed in the sheath (29; 39), the face of which is complementary to that (33; 43) of the sheath, and having, in each end area, a right-hand tapped portion (351, 352;
451, 452) and a left-hand tapped portion (361, 362; 461, 462) corresponding to the threaded portion (27, 28; 37, 38) of the said ends (4, 5) or conversely. - 15. Sleeve according to claim 14, characterized by the fact that the shell halves 311, 312; 411, 412) are spaced apart by a gap (53;
57) and positioned by adjusting spacers (54; 55; 56) allowing the tightening of the threads of the two shell halves on the threads of the ends of the rods. - 16. Sleeve according to claim 15, characterized by the fact that the sheath (29; 39) has an internal tapped portion (40) or an external threaded portion (51) suitable for cooperating with the shell halves (311, 312; 411, 422), directly or indirectly, to allow the locking of the shell halves in the sheath and, consequently, their rotational and translational immobilization.
- 17. Process for producing a mechanical connection according to claim 1, for connecting at least two concrete reinforcing rods (1, 2) wherein the rods (1, 2) comprise, on one hand, ribs (6) or fins on their external surface and, on the other hand, each at least one threaded end (4, 5) designed to be inserted into a connecting sleeve (3) having tapped portions, characterized by the fact that:
- the end (4) of the first reinforcing rod to be connected is passed completely through the sleeve (3), - the ends (4, 5), rotationally immobile, of the said first and second rods (1, 2) are placed substantially coaxially, substantially end to end, - the two reinforcing rods (1, 2) are connected by rotating the sleeve (3) about the end (4) of the said first rod (1) and the sleeve (3) is screwed, directly or indirectly, to the end (5) of the other rod to be connected (2), the said sleeve having a first tapped portion (7; 17; 27; 37) and a Second tapped portion (8; 18; 28; 38) corresponding to the threaded portions of the ends (4, 5) of the said first and second rods (l, 2). - 18. Process according to claim 17, characterized by the fact that the positioning of the said ends of the first and second rods is adjusted by rotating at least one of the two said first and/or second tapped portions and the said tapped portion is locked in the sleeve when the connection is screwed.
Priority Applications (7)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR9004278A FR2660000B2 (en) | 1988-02-03 | 1990-03-23 | IMPROVEMENTS IN OR RELATING TO THE MECHANICAL CONNECTION OF CONCRETE ROUNDS, METHOD FOR PRODUCING SUCH A CONNECTION AS WELL AS ROUND CONCRETE, ENABLING THE IMPLEMENTATION OF SAID LINK. |
| FR9100595A FR2671365A1 (en) | 1991-01-04 | 1991-01-04 | Mechanical linkage for concrete-reinforcement bars, linkage sleeve enabling the said linkage to be carried out and method of producing such a linkage |
| AT91440020T ATE121487T1 (en) | 1990-03-23 | 1991-03-15 | CONNECTION OF CONCRETE BARS, CONNECTION SLEEVE USE FOR SUCH CONNECTION, AND METHOD FOR PRODUCING SUCH CONNECTION. |
| DE69108969T DE69108969D1 (en) | 1990-03-23 | 1991-03-15 | Connection of concrete bars, coupling sleeve to be used for this connection, and method for making such connection. |
| EP91440020A EP0448488B1 (en) | 1990-03-23 | 1991-03-15 | Coupling for reinforcing bars, sleeve for use in said coupling, and method of forming such coupling |
| US07/781,968 US5308184A (en) | 1989-01-27 | 1991-10-24 | Method and apparatus for mechanically joining concrete-reinforcing rods |
| CA002065203A CA2065203A1 (en) | 1990-03-23 | 1992-04-06 | Mechanical connection for reinforcing rods, connecting sleeve permitting the implementation of the said connection, reinforcing rod permitting the implementation of the said connection, and process for producing such a connection |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR9004278A FR2660000B2 (en) | 1988-02-03 | 1990-03-23 | IMPROVEMENTS IN OR RELATING TO THE MECHANICAL CONNECTION OF CONCRETE ROUNDS, METHOD FOR PRODUCING SUCH A CONNECTION AS WELL AS ROUND CONCRETE, ENABLING THE IMPLEMENTATION OF SAID LINK. |
| FR9100595A FR2671365A1 (en) | 1991-01-04 | 1991-01-04 | Mechanical linkage for concrete-reinforcement bars, linkage sleeve enabling the said linkage to be carried out and method of producing such a linkage |
| CA002065203A CA2065203A1 (en) | 1990-03-23 | 1992-04-06 | Mechanical connection for reinforcing rods, connecting sleeve permitting the implementation of the said connection, reinforcing rod permitting the implementation of the said connection, and process for producing such a connection |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2065203A1 true CA2065203A1 (en) | 1993-10-07 |
Family
ID=27169059
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002065203A Abandoned CA2065203A1 (en) | 1988-02-03 | 1992-04-06 | Mechanical connection for reinforcing rods, connecting sleeve permitting the implementation of the said connection, reinforcing rod permitting the implementation of the said connection, and process for producing such a connection |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP0448488B1 (en) |
| AT (1) | ATE121487T1 (en) |
| CA (1) | CA2065203A1 (en) |
| DE (1) | DE69108969D1 (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2689156B1 (en) * | 1992-03-30 | 1995-07-13 | Techniport Sa | PROCESS FOR PRODUCING A MECHANICAL CONNECTION OF CONCRETE ROUND, CONNECTION OBTAINED BY THE PROCESS, CONCRETE ROUND AUTHORIZING THE IMPLEMENTATION OF SAID PROCESS, AND CONCRETE ROUND PREPARATION INSTALLATION. |
| FI922525A0 (en) * | 1992-06-01 | 1992-06-01 | Tartuntamarkkinointi Oy | FOERFARANDE FOER SKAERNING AV EN GAENGA I EN STAONG. |
| NL1010661C2 (en) * | 1998-11-26 | 2000-06-19 | Novitec International B V | Reinforcement system as well as concrete construction. |
| US7624556B2 (en) | 2003-11-25 | 2009-12-01 | Bbv Vorspanntechnik Gmbh | Threaded deformed reinforcing bar and method for making the bar |
| PL2485792T3 (en) | 2009-10-09 | 2018-05-30 | Philip Morris Products S.A. | Aerosol generator including multi-component wick |
| CN109339346B (en) * | 2018-11-22 | 2020-12-15 | 宁波中交水运设计研究有限公司 | Connecting piece for temporary support of building engineering and connecting method thereof |
| CN113513123A (en) * | 2021-07-28 | 2021-10-19 | 河南省第一建筑工程集团有限责任公司 | Grouting heat-storage maintenance construction method for prefabricated vertical member in low-temperature environment |
Family Cites Families (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3415552A (en) * | 1966-11-29 | 1968-12-10 | Howlett Machine Works | Splicing metallic reinforcing rods with a threaded coupling sleeve |
| DE1784807C3 (en) * | 1968-09-20 | 1974-04-04 | Strabag Bau-Ag, 5000 Koeln | Butt joint of the longitudinal reinforcement bars of prefabricated structural parts made of concrete |
| DE2161500B2 (en) * | 1971-12-10 | 1976-09-02 | Institutul Politehnic, Iasi (Rumänien) | METHOD AND DEVICE FOR ASSEMBLING A PRE-TENSIONED STRUCTURE FROM PRECAST CONCRETE PARTS |
| FR2207232B3 (en) * | 1972-11-22 | 1976-01-09 | Pelissier Yvan Fr | |
| US4362423A (en) * | 1980-09-08 | 1982-12-07 | Williams Form Engineering Corporation | Coupling for coil-thread rebar |
| DE3122874C1 (en) * | 1981-06-10 | 1983-01-13 | Walter 4000 Düsseldorf Hoff | Device for connecting reinforcing bars in the building industry |
| NL8301358A (en) * | 1983-04-18 | 1984-11-16 | Erico Europa | Concrete reinforcing rod coupling - has two tapped sleeves screwed onto rod ends and secured together by third |
| FR2558904A1 (en) * | 1984-01-31 | 1985-08-02 | Techniport Sarl | Linkage member for two tie rods. |
| NZ214897A (en) * | 1985-01-25 | 1988-05-30 | Titan Mining & Eng | Rock bolt with thread formed on helical ridges |
| FR2626600B1 (en) * | 1988-02-03 | 1990-09-21 | Techniport Sa | MECHANICAL CONNECTION OF CONCRETE ROUNDS |
| DE8803649U1 (en) * | 1988-03-17 | 1988-06-09 | Behrens, Josef, Dipl.-Ing., 2842 Lohne, De | |
| GB2227802A (en) * | 1989-01-26 | 1990-08-08 | Square Grip Ltd | Concrete reinforcement bar couplings and apparatus for enlarging bar ends |
-
1991
- 1991-03-15 AT AT91440020T patent/ATE121487T1/en active
- 1991-03-15 DE DE69108969T patent/DE69108969D1/en not_active Expired - Lifetime
- 1991-03-15 EP EP91440020A patent/EP0448488B1/en not_active Expired - Lifetime
-
1992
- 1992-04-06 CA CA002065203A patent/CA2065203A1/en not_active Abandoned
Also Published As
| Publication number | Publication date |
|---|---|
| EP0448488A1 (en) | 1991-09-25 |
| EP0448488B1 (en) | 1995-04-19 |
| ATE121487T1 (en) | 1995-05-15 |
| DE69108969D1 (en) | 1995-05-24 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| FZDE | Discontinued | ||
| FZDE | Discontinued |
Effective date: 19941006 |