US20200208422A1 - System for joining or reinforcing components - Google Patents

System for joining or reinforcing components Download PDF

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Publication number
US20200208422A1
US20200208422A1 US16/472,114 US201716472114A US2020208422A1 US 20200208422 A1 US20200208422 A1 US 20200208422A1 US 201716472114 A US201716472114 A US 201716472114A US 2020208422 A1 US2020208422 A1 US 2020208422A1
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US
United States
Prior art keywords
threaded sleeve
component
clamping element
internal thread
threaded
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
Application number
US16/472,114
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English (en)
Inventor
Andreas Heck
Ulrich Hettich
Andreas Schwab
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ludwig Hettich Holding GmbH and Co KG
Original Assignee
Ludwig Hettich Holding GmbH and Co KG
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Filing date
Publication date
Application filed by Ludwig Hettich Holding GmbH and Co KG filed Critical Ludwig Hettich Holding GmbH and Co KG
Assigned to LUDWIG HETTICH HOLDING GMBH & CO KG reassignment LUDWIG HETTICH HOLDING GMBH & CO KG ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: HETTICH, ULRICH, SCHWAB, ANDREAS, HECK, ANDREAS
Publication of US20200208422A1 publication Critical patent/US20200208422A1/en
Abandoned legal-status Critical Current

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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
    • E04G23/00—Working measures on existing buildings
    • E04G23/02—Repairing, e.g. filling cracks; Restoring; Altering; Enlarging
    • E04G23/0218—Increasing or restoring the load-bearing capacity of building construction elements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B37/00—Nuts or like thread-engaging members
    • F16B37/12—Nuts or like thread-engaging members with thread-engaging surfaces formed by inserted coil-springs, discs, or the like; Independent pieces of wound wire used as nuts; Threaded inserts for holes
    • F16B37/122—Threaded inserts, e.g. "rampa bolts"
    • F16B37/125—Threaded inserts, e.g. "rampa bolts" the external surface of the insert being threaded
    • F16B37/127—Threaded inserts, e.g. "rampa bolts" the external surface of the insert being threaded and self-tapping
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/38—Connections for building structures in general
    • E04B1/41—Connecting devices specially adapted for embedding in concrete or masonry
    • 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
    • E04C5/10—Ducts
    • 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
    • E04G21/14—Conveying or assembling building elements
    • E04G21/16—Tools or apparatus
    • E04G21/18—Adjusting tools; Templates
    • E04G21/1841—Means for positioning building parts or elements
    • E04G21/185—Means for positioning building parts or elements for anchoring elements or elements to be incorporated in the structure
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D21/00—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection
    • E21D21/0026—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection characterised by constructional features of the bolts
    • E21D21/0033—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection characterised by constructional features of the bolts having a jacket or outer tube
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B25/00—Screws that cut thread in the body into which they are screwed, e.g. wood screws
    • F16B25/001—Screws that cut thread in the body into which they are screwed, e.g. wood screws characterised by the material of the body into which the screw is screwed
    • F16B25/0026—Screws that cut thread in the body into which they are screwed, e.g. wood screws characterised by the material of the body into which the screw is screwed the material being a hard non-organic material, e.g. stone, concrete or drywall
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F30/00—Computer-aided design [CAD]
    • G06F30/10—Geometric CAD
    • G06F30/12—Geometric CAD characterised by design entry means specially adapted for CAD, e.g. graphical user interfaces [GUI] specially adapted for CAD
    • 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
    • E04G23/00—Working measures on existing buildings
    • E04G23/02—Repairing, e.g. filling cracks; Restoring; Altering; Enlarging
    • E04G23/0218—Increasing or restoring the load-bearing capacity of building construction elements
    • E04G2023/0251—Increasing or restoring the load-bearing capacity of building construction elements by using fiber reinforced plastic elements
    • E04G2023/0262—Devices specifically adapted for anchoring the fiber reinforced plastic elements, e.g. to avoid peeling off
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
    • E04H9/00—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate
    • E04H9/02—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate withstanding earthquake or sinking of ground
    • E04H9/021—Bearing, supporting or connecting constructions specially adapted for such buildings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B5/00—Joining sheets or plates, e.g. panels, to one another or to strips or bars parallel to them
    • F16B5/06—Joining sheets or plates, e.g. panels, to one another or to strips or bars parallel to them by means of clamps or clips
    • F16B5/0607—Joining sheets or plates, e.g. panels, to one another or to strips or bars parallel to them by means of clamps or clips joining sheets or plates to each other
    • F16B5/0621—Joining sheets or plates, e.g. panels, to one another or to strips or bars parallel to them by means of clamps or clips joining sheets or plates to each other in parallel relationship
    • F16B5/0642—Joining sheets or plates, e.g. panels, to one another or to strips or bars parallel to them by means of clamps or clips joining sheets or plates to each other in parallel relationship the plates being arranged one on top of the other and in full close contact with each other
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F2119/00—Details relating to the type or aim of the analysis or the optimisation
    • G06F2119/14—Force analysis or force optimisation, e.g. static or dynamic forces

Definitions

  • the present invention relates to the joining and reinforcing of components.
  • it relates to the joining and reinforcing of components made of concrete.
  • the object underlying the present invention is to provide an improved system for joining components or for reinforcing a component.
  • the system according to the invention comprises a first and a second threaded sleeve, which each comprise the following:
  • the system further comprises an elongate clamping element, which is suitable for being guided through the second threaded sleeve and for being inserted into or guided through the first threaded sleeve and which is suitable for axially clamping the first and the second threaded sleeve in such a manner that the first and the second threaded sleeve generate opposed bond stresses in the respective component.
  • the second threaded sleeve can also be omitted.
  • the elongate clamping element is suitable for being guided through a borehole in the component to be reinforced, or in the second component of the two components to be joined, respectively, and for being secured to the first threaded sleeve.
  • the first threaded sleeve is clamped with the component to be reinforced, or with the second component of two components to be clamped, respectively, for example in that a head on the trailing end of the elongate clamping element, or a nut provided on a thread on the trailing end of the elongate clamping element, is screwed against the component to be reinforced, or the second component of two components to be joined.
  • the above-cited bond stress only appears in the region of the first threaded sleeve.
  • all further advantageous embodiments described below also relate to this simplified alternative, without reference being separately made to this below.
  • This simplified alternative can in particular also comprise a grooving tip according to one of the below-described embodiments and an elastic element, in particular a tension spring or a compression spring.
  • the information that the clamping element is suitable for being guided through the first and possibly second threaded sleeve does not mean that the first and (if available) the second threaded sleeve have first to be introduced into the borehole and that the clamping element is subsequently guided through the threaded sleeve(s). Rather, it is possible in certain embodiments first to introduce the elongate clamping element into the borehole, and then to attach or “thread” the threaded sleeve(s) to the clamping element, and screw them into the borehole so as to slide across the clamping element, wherein the clamping element, even though it is itself stationary, is likewise guided past the first and possibly the second threaded sleeve.
  • a threaded sleeve can in each case be arranged in a borehole on each side of a parting line.
  • the “parting line” identifies in the usual way the boundary between the components, which abut against one another.
  • the “parting line” can be envisaged as a hypothetical crack, the appearance of which is to be prevented by the reinforcement.
  • the two threaded sleeves are axially clamped, typically under tension by means of the clamping element, so that the threaded sleeves generate an opposed bond stress in the respective component via their respective external threads.
  • This bond stress can be generated across the entire length, but at least across a significant portion of the length of the respective threaded sleeve.
  • the load is thus introduced into the respective component across a comparatively large section, and a uniform load distribution on both sides of the parting line can be achieved, whereby the stability of the connection is increased.
  • the bond stress creates an inherent stress distribution inside the component, which is to counteract forces that may occur in response to a load on the component.
  • the system can, for example, prevent the formation of a crack as a result of a tensile load in that the component is prestressed with the aid of the system in terms of compression, which counteracts the tensile load.
  • the difference from a conventional reinforcement is that a conventional reinforcement, regardless of whether it is implemented in terms of a reinforcing steel or a concrete screw, only develops its effect when a crack occurs. Even though a conventional reinforcement can prevent a widening of such a crack, it can absorb significant forces only when there are perceivable movements in the component, i.e.
  • the system preferably comprises a grooving tip, which is suitable for grooving a thread into the corresponding component, wherein the grooving tip comprises a power drive, by means of which a torque for screwing the grooving tip into the respective component can be transmitted to the grooving tip.
  • a part comprising an external thread or at least a frontal or leading external threaded section, which is suitable specifically for cutting a thread in the component is understood to be the “grooving tip”.
  • This threaded section can for example be especially hardened and additionally or alternatively can have teeth or the like, which facilitate the cutting of the thread.
  • the grooving tip can be embodied as a separate part, but it can also be embodied as a frontal section of the first threaded sleeve.
  • the second threaded sleeve does not then require a corresponding grooving tip, because it can simply be screwed into the thread, which is grooved by means of the separate grooving tip, or by means of the grooving tip as part of the first threaded sleeve.
  • the component to be reinforced or the components to be joined preferably consists or consist of concrete, masonry, a composite material or a wood material.
  • concrete is to be understood in a broad manner, and in particular is considered to be a generic term for the cement-bound composite materials: reinforced concrete, prestressed concrete, fibrous concrete, etc., but also for composite materials that are not cement-bonded, such as wet-mix aggregate, aerated concrete or resin concrete, without being limited to these.
  • the elongate clamping element is formed by a screw or a threaded rod, which has at least one external thread, in particular a metric external thread, wherein at least one of the threaded sleeves or the grooving tip has an internal thread, into which the screw can be screwed.
  • the screw or threaded rod can be secured to the second component in the case of joining, for example, in that a screw head is screwed against the second component on the side of the second component facing away from the parting line, or in that a nut is screwed against the second component on the side facing away from the parting line.
  • the screw or threaded rod can be secured on the exterior of the component to be reinforced, for example in that a screw head is screwed from the exterior against the component, or in that a nut is screwed from the exterior against the component to be reinforced.
  • the at least one external thread is preferably embodied at least in the region of the leading end of the screw or threaded rod, and the grooving tip or the first threaded sleeve has the cited internal thread.
  • the internal thread is preferably at least partially embodied in a leading section of the first threaded sleeve.
  • the elongate clamping element is formed by a screw comprising a head, which is suitable for engaging directly with a trailing end of the second threaded sleeve or via an element located in-between, in order to clamp the second threaded sleeve in the direction of the first threaded sleeve as a result of the at least one external thread of the screw being screwed into the at least one internal thread of the first threaded sleeve.
  • the screw is thus “secured” to the second threaded sleeve by way of this screw head.
  • the elongate clamping element is formed by a threaded rod and the system furthermore comprises a nut, which, on a trailing end of the threaded rod, can be screwed onto the latter, in order to engage directly with a trailing end of the second threaded sleeve or by way of an element located in-between, and clamp the second threaded sleeve in the direction of the first threaded sleeve.
  • the invention is not limited to these embodiments, but rather that a plurality of other alternatives is possible for securing the screw or threaded rod to one of the threaded sleeves.
  • the first threaded sleeve has, for example, a first internal thread
  • the second threaded sleeve has a second internal thread
  • the screw or threaded rod has a first and a second external thread, which are suitably dimensioned in order to be screwed into the first or second internal thread, respectively.
  • the inner diameter of the second internal thread is larger than the inner diameter of the first internal thread
  • the pitch of the first internal thread differs from the pitch of the second internal thread, and in particular is larger than the pitch of the second internal thread.
  • the first external thread of the screw can be guided past the second internal thread in the second threaded sleeve and can be screwed into the first internal thread in the first threaded sleeve.
  • the second external thread of the screw is, or thereby becomes, engaged with the second internal thread in the second threaded sleeve.
  • the pitch of the first internal thread is larger than the pitch of the second internal thread, the two threaded sleeves are moved towards one another when the screw is screwed in, and are thus axially clamped.
  • the first thread can also be embodied in the grooving tip instead of in the first threaded sleeve.
  • the system further comprises an elastic element, in particular a tension spring or a compression spring, which can be preloaded by actuating the clamping element, and which is in operative connection with the first threaded sleeve, the second threaded sleeve, and the clamping element in such a manner that the preloading of the elastic element contributes to, or effects, the axial clamping of the two threaded sleeves.
  • the elastic element effects an axial clamping of the first threaded sleeve against the second component of two components to be reinforced, or with the component to be reinforced, respectively.
  • the level of the clamping of the sleeves against one another, and, as a result of this, the bond stress in the respective component can be set comparatively precisely and can in particular be maintained, even if the component, the external thread of the threaded sleeves, the clamping element and/or the composite should yield slightly after assembly.
  • the stress in the composite will decrease as a result of the ductility of the thread material, because a slight yielding of the external thread of the threaded sleeves can lead to a significant decrease of the bond stress.
  • the preloading is generated by an elastic element, because the preloading by the elastic element virtually does not change when the thread pitches yield slightly.
  • the elastic element is preferably formed in terms of a compression spring, which can suitably be arranged between the head of the screw or the nut, and the trailing end of the second threaded sleeve or, in the case of the simplified embodiment without a second threaded sleeve, can be arranged between the head of the screw or the nut, and the side, which faces away from the parting line, of the second component of two components to be joined, or between the head of the screw, or the nut, and the outer side of the component to be reinforced.
  • This alternative enables a simple assembly and a simple structural design.
  • the power drive of one or both threaded sleeves is formed by an inner profile or a slot.
  • the power drive of the grooving tip is preferably formed by an inner profile.
  • the inner profile has a smaller diameter than the internal thread, and the inner profile is arranged closer to the leading end of the grooving tip than the internal thread.
  • a corresponding drive tool will have a smaller outer diameter than the diameter of the internal thread, and can thus be guided past the internal thread all the way to the inner profile without any problems.
  • the inner profile has a larger diameter than the internal thread, and the inner profile is arranged farther away from the leading end of the grooving tip than the internal thread.
  • the drive tool will also have a larger diameter than the diameter of the internal thread, so that it cannot be guided past the said internal thread. Due to the fact, however, that the inner profile is arranged farther away from the leading end of the grooving tip in this embodiment, the drive tool does not need to be guided past the internal thread in this configuration, in order to be engaged with the inner profile.
  • At least some sections of the inner profile and the internal thread are embodied in the same axial section of the grooving tip.
  • the internal thread and the inner profile overlap, as will be described in more detail below with the aid of an exemplary embodiment.
  • the inner profile extends over the entire length of the respective threaded sleeve or of the grooving tip.
  • This embodiment has special advantages with regard to manufacture, because it enables the sleeve comprising the inner profile to be made from a tube with an inner contour by means of drawing, wherein the inner contour corresponds to the inner profile of the drive.
  • the inner profile is embodied as a hexagonal socket or a hexalobular socket.
  • the inner profile preferably has a plurality of wedge-shaped recesses, which are embodied as keyways or as spherical elements, for purposes of accommodating a tool.
  • the first and/or the second threaded sleeve consists of a drawn tube comprising an inner profile, on or in which, respectively, the external thread and/or an internal thread is embodied by means of forming or machining, in particular by means of hob peeling.
  • This embodiment enables comparatively cost-efficient production and also provides high stability due to the massive design.
  • first and/or the second threaded sleeve is wound.
  • a wound sleeve can likewise be produced comparatively cost-efficiently.
  • the invention relates to a method for reinforcing a component by using a system according to one of the above-described embodiments.
  • the method comprises the following steps:
  • the elongate clamping element can be guided through the second threaded sleeve and into or through the first threaded sleeve, after the first and the second threaded sleeve have been screwed into the borehole, and are secured with a leading end to the first threaded sleeve.
  • the elongate clamping element is first inserted into the borehole, and the elongate clamping element is guided through the first and the second threaded sleeve, in that the first and the second threaded sleeve are threaded onto the elongate clamping element and are screwed into the borehole, wherein a leading end of the elongate clamping element is secured to the first threaded sleeve, in that the first threaded sleeve abuts against a stop element on the leading end of the elongate clamping element, in particular a screw head or a nut.
  • this first threaded sleeve is screwed into the borehole, so that the said first threaded sleeve assumes a first position in the component, the elongate clamping element is guided into the borehole before or after the first threaded sleeve is screwed in, a leading end of the elongate clamping element is secured to the first threaded sleeve, and the first threaded sleeve axially clamps with the component in such a manner that the second threaded sleeve is loaded in the direction of the entrance to the borehole.
  • the method is preferably executed in a concrete component, in particular a concrete ceiling.
  • the reinforcing method is particularly preferably executed in the vicinity of load-bearing columns, walls, beams and supports of the concrete ceiling.
  • a serious problem is the strength of concrete ceilings in the vicinity of load-bearing structures, such as columns, walls, beams and supports.
  • the inventors have determined that the system according to the invention is ideal for reinforcing purposes, in order to avoid cracks in concrete ceilings in the vicinity of such load-bearing structures, and in order to increase the load-bearing capacity of the component to be reinforced. It is of crucial importance that the system of the invention provides for a prestressed reinforcement, which is already in operation before any cracks appear in the concrete.
  • the level of the bond stress is set to a predetermined value, in particular by using a predetermined screw-in torque of a screw, which forms the elongate clamping element, or by controlled preloading of the cited elastic element.
  • Suitable preloads as well as the suitable placement of the reinforcement can be determined by means of static analyses or calculations using the finite elements method.
  • the level of the bond stress is controlled after the introduction of the reinforcement and is readjusted, if applicable, in particular at regular maintenance intervals. It is an essential advantage of the system according to the invention that the bond stress in the respective components can be readjusted by actuating the clamping element, in order to counteract changes in the component or in the parts of the system, e.g. due to the ductility of the material.
  • the elongate clamping element can also have, on its leading end, a stop element, in particular a screw head or a nut, which is screwed on, and the elongate clamping element can first be inserted into the borehole, the first threaded sleeve can be threaded onto the elongate clamping element and can be screwed into the borehole, and the leading end of the elongate clamping element can be secured to the first threaded sleeve, in that the first threaded sleeve abuts against the stop element on the leading end of the elongate clamping element.
  • a stop element in particular a screw head or a nut
  • a further aspect of the invention relates to a method for joining a first and a second component using a system according to one of the above-described embodiments, comprising the following steps: drilling a borehole into the first and the second component, screwing the first threaded sleeve into the borehole, so that the said first threaded sleeve assumes a first position in the component, screwing the second threaded sleeve into the borehole, so that the said second threaded sleeve assumes a position in the second component, which is spaced apart from the first position, inserting the elongate clamping element through the second threaded sleeve and into or through the first threaded sleeve, and axial clamping of the first and of the second threaded sleeve in such a manner that the first and the second threaded sleeve generate opposed bond stresses in the respective component.
  • the elongate clamping element can, as in the case of the reinforcement, be guided through the second threaded sleeve and into or through the first threaded sleeve, after the first and the second threaded sleeve have been screwed into the borehole, and are secured with a leading end to the first threaded sleeve.
  • the elongate clamping element is first inserted into the borehole, and the elongate clamping element is guided through the first and the second threaded sleeve, in that the first and the second threaded sleeve are threaded onto the elongate clamping element and are screwed into the borehole, wherein a leading end of the elongate clamping element is secured to the first threaded sleeve, in that the first threaded sleeve abuts against a stop element on the leading end of the elongate clamping element, in particular a screw head or a nut.
  • the method for joining a first and a second component can also be executed using an above-described simplified system, which only comprises one (first) threaded sleeve.
  • Such a method comprises the following steps: drilling a borehole into the first and the second component, screwing the first threaded sleeve into the borehole, so that the said first threaded sleeve assumes a position in the first component, inserting the elongate clamping element into the borehole before or after the first threaded sleeve is screwed in, securing a leading end of the elongate clamping element to the first threaded sleeve, and axial clamping of the first threaded sleeve with the second component.
  • a preferred embodiment relates to a method for joining a first and a second component, wherein at least the first component is made of concrete, and wherein the connection between the first and the second component during intended use experiences a transverse load Q as well as a tensile load N, whereby Q/N ⁇ 0.25, preferably Q/N ⁇ 0.5, and particularly preferably Q/N ⁇ 1.
  • the loads during “intended use” are those loads, which actually appear, or which can appear, in practice on the connection in the finished structure, and which are taken into account when planning the structure.
  • a borehole is introduced into the first and the second component at an angle ⁇ of between 20° and 80°, preferably between 30° and 75°, to the parting line between the first and the second component.
  • secondarily introduced connecting elements are always arranged normal to the component surface or parting line, respectively.
  • Typical clamping elements in terms of the present invention i.e. in particular screws or threaded rods, are rod-shaped, flexible connecting means and are thus only able to transmit transverse loads to a limited extent. To effectively utilize the clamping element in a join connection of components, it should thus be subjected to tension, if possible.
  • the method according to the invention provides that, in the event that, in addition to a tensile load N normal to the parting line, a significant transverse load Q also appears, which is at least 25%, preferably at least 50% and particularly preferably 100% of the tensile load N, the borehole is not embodied normal to the parting line, but at an angle ⁇ , which is inclined with respect to the borehole.
  • These angles of inclination ⁇ 0 always lie between 20° and 80°, in preferred embodiments between 30° and 75°.
  • the particular angle of inclination ⁇ is chosen in such a manner that the percentage of the tensile load in the clamping element, which is introduced at an inclined angle, is larger than if the same clamping element with the same load of the connection were to be introduced normal to the parting line.
  • the step of clamping comprises the loading of a compression spring, which is arranged between the second component and the head or the nut on the trailing end of the elongate clamping element, or the loading of a tensile spring belonging to the clamping element.
  • a compression spring which is arranged between the second component and the head or the nut on the trailing end of the elongate clamping element, or the loading of a tensile spring belonging to the clamping element.
  • the method is executed using a system according to one of the above-described embodiments.
  • a system can also comprise the above-cited simplified system, which does not comprise a second threaded sleeve.
  • FIG. 1 shows a view of two components, which are connected with a system according to an embodiment of the invention.
  • FIG. 1 a shows the same view as in FIG. 1 in cross section.
  • FIG. 2 shows a similar view to FIG. 1 , in which, in a deviation from FIG. 1 , a compression spring and a threaded rod are used.
  • FIG. 3 shows a longitudinal sectional view, a plan view, and a perspective view of a grooving tip.
  • FIG. 4 shows a longitudinal sectional view, a plan view, and a perspective view of a grooving tip in an alternative embodiment.
  • FIG. 5 shows a longitudinal sectional view, a plan view, and a perspective view of a grooving tip in yet another alternative embodiment.
  • FIG. 6 shows a side view, a plan view, and a longitudinal cross-sectional view of a massive threaded sleeve.
  • FIG. 7 shows a side view, a plan view, and a longitudinal cross-sectional view of a wound threaded sleeve.
  • FIG. 8 shows a side view, a plan view, and a longitudinal view of a wound threaded sleeve comprising contact surfaces, which are inclined towards the longitudinal axis.
  • FIG. 9 shows four perspective views of a threaded sleeve and of a tool for hobbing.
  • FIG. 10 shows a view of two components, which are connected with a system according to an embodiment of the invention, wherein the borehole is arranged so as to be inclined at an angle to a parting line between the components.
  • FIG. 11 shows an embodiment of a simplified system, which only comprises one (first) threaded sleeve.
  • FIG. 12 shows an embodiment of a simplified system comprising only one (first) threaded sleeve, in which the clamping element is formed by a screw, comprising a screw head, which serves as a stop element for the first threaded sleeve.
  • FIG. 13 shows an embodiment of a simplified system comprising only one (first) threaded sleeve, in which the clamping element is formed by a threaded rod, to the leading end of which a nut is screwed, which serves as a stop element for the first threaded sleeve.
  • FIG. 1 shows a first component 10 and a second component 12 of concrete, which abut against one another on a parting line 14 .
  • FIG. 1 a shows the same view in cross-section.
  • a borehole 16 extends through the two components 10 and 12 , in which borehole a system 18 is arranged, which is designated for connecting or joining, respectively, the two components 10 , 12 .
  • the system 18 comprises a first threaded sleeve 20 and a second threaded sleeve 22 , as well as an elongate clamping element 24 , which is formed by a screw in the embodiment as shown.
  • the first threaded sleeve 20 is arranged in the first component 10
  • the second threaded sleeve 22 in the second component 12 .
  • the system 18 further comprises a grooving tip 26 , which is arranged in the region of the leading end of the first threaded sleeve 20 , and which is shown in more detail in FIG. 3 .
  • the grooving tip 26 is a separate part, but in other embodiments it can also be embodied as part of the first threaded sleeve 20 .
  • the grooving tip 26 has a metric internal thread 28 and an inner profile 30 , which forms a power drive, by means of which a torque for screwing the grooving tip 26 into the first component 10 can be transmitted to the grooving tip 26 .
  • the first and the second threaded sleeve 20 , 22 also have a power drive, which is formed by slots 29 in the trailing end of the respective threaded sleeve 20 , 22 .
  • Both threaded sleeves 20 , 22 further have an external thread 31 .
  • the screw 24 On its leading end, the screw 24 has a metric external thread 32 and, on its trailing end, a screw head 34 , in which a power drive 36 is embodied.
  • the borehole 16 is first embodied.
  • Thee grooving tip 26 is then screwed into the borehole 16 , namely through the second component 12 , into the first component 10 .
  • a drive tool (not shown) is used for this purpose, which is engaged with the inner profile 30 in the grooving tip 26 .
  • the grooving tip 26 is suitable for grooving a thread into the components 10 , 12 .
  • the first threaded sleeve 20 is screwed into the borehole 16 , until it abuts against the trailing end of the grooving tip 26 in the first component 10 .
  • the second threaded sleeve 22 is screwed into the borehole, but remains in the second component 12 . Due to the fact that a thread is already grooved into the borehole 16 by means of the grooving tip 26 , the threaded sleeves 20 , 22 can be screwed in comparatively easily.
  • the screw 24 is guided through the second threaded sleeve 22 and the first threaded sleeve 20 into the grooving tip 26 and is screwed with its metric external thread 32 into the metric internal thread on the leading end of the grooving tip 26 , until the head 34 of the screw 24 abuts against the trailing end of the second threaded sleeve 22 , as is shown in FIGS. 1 and 1 a .
  • the first and the second threaded sleeve 20 , 22 are axially clamped, wherein the threaded sleeves 20 , 22 generate a corresponding opposed bond stress in conjunction with the components 10 , 12 via their external threads 31 .
  • a simplified system can also be used, which does not include the second threaded sleeve 22 .
  • the head 34 of the screw 24 would be embodied so as to be wider than the borehole 16 , and it would be supported on the side of the second component 12 facing away from the parting line 14 .
  • the components 10 and 12 can thus also be clamped with one another.
  • the advantage of this embodiment is that the additional second sleeve 22 can be omitted. Instead of using the bond stress in the second sleeve 22 , the force, with which the first and the second component 10 , 12 are clamped, is applied only via the head 34 of the screw 14 in this case.
  • This bond stress can be generated across the entire length, at least across a significant portion of the length of the respective threaded sleeve 20 , 22 .
  • the applied preload is thus introduced into the respective component 10 , 12 across a comparatively large section.
  • a uniform load distribution on both sides of the parting line 14 can be attained, whereby the load-bearing capacity of the structure is increased.
  • the respective length of the threaded sleeves 20 , 22 is ideally to be chosen in such a manner that the shape changes, which occur under load, are approximately identical on both sides of the parting line.
  • the load introduction surfaces in the two components 10 , 12 are preferably almost identical, whereby a comparable shape change on both sides of the parting line 14 is attained under load, which is advantageous for the calculated anticipation of the relative component movements.
  • This mode of action is generally independent of the alignment inside the components to be joined, at least insofar as it is a homogenous material.
  • the material wood forms an exception to this, which, due to the direction of its fibers, exhibits an anisotropic behavior.
  • the system 18 and its use are not limited to applications in which the borehole 16 runs normal to the parting line 14 between the components 10 , 12 , as shown in FIGS. 1, 1 a , and 2 . Instead, applications, in which the system 18 is inserted at an angle to the parting line 14 , are also provided, as will be described in more detail below with reference to FIG. 11 .
  • reference numeral 14 marks a position, at which a crack, which is to be prevented by means of the reinforcement, could be formed in the component under tensile loading of the component.
  • the position of the system 18 is chosen in such a manner in the case of reinforcement that it is arranged transversely to anticipated cracks. Due to the bond stress, the system 18 generates an inherent stress distribution inside the component, which counteracts tensile forces, which could lead to a crack 14 .
  • a simplified system with only one (first) threaded sleeve can also be used for the purpose of reinforcement.
  • This sole threaded sleeve can then also be embodied to be longer than is shown in FIG. 1 , and can in particular extend across the anticipated crack 14 .
  • FIG. 2 shows a similar view to that in FIG. 1 , but in which a threaded rod 23 , onto which a nut 25 is screwed in order to clamp the first and the second threaded sleeve 20 , 22 against one another, is used instead of a screw 24 .
  • a compression spring 27 is arranged between the nut 25 and the trailing end of the second threaded sleeve 22 , which compression spring is preloaded with a predetermined force by screwing the nut 25 onto the threaded rod 23 .
  • FIG. 3 shows a longitudinal cross-sectional view, a plan view, a side view, and a perspective view of the grooving tip 26 .
  • the height of the thread pitch of the external thread 31 within the last approximately one and a half turns decreases to zero in the direction of the leading end, in order to facilitate the screw-in.
  • the thread 31 is especially hardened in this region. Even though this is not shown in the illustration, the thread can have teeth in the region of the grooving tip 26 , which teeth increase the cutting effect and further facilitate the screw-in and grooving.
  • the core of the grooving tip 26 is furthermore embodied so as to be slightly conical.
  • the metric internal thread 28 in the case of the grooving tip 26 of FIG. 3 is located on the leading end of the grooving tip 26 .
  • the inner profile 30 adjoins, which, in the embodiment shown, has a star shape, comprising a plurality of wedge-shaped recesses 38 , which face radially outwards and with which an appropriate tool (not shown) can engage in order to exert a torque on the grooving tip 26 and thus on the threaded sleeve 20 as a whole.
  • the diameter of the inner profile 30 is large enough for the screw 24 to be capable of being guided past the inner profile 30 unhindered, in order then to be screwed into the metric internal thread 28 of the grooving tip 26 with its metric external thread 32 .
  • FIG. 4 shows an alternative embodiment, in which the arrangement of the metric internal thread 28 and of the inner profile 30 are exchanged, i.e. the inner profile 30 is located on the leading end of the grooving tip 28 , and the internal thread 28 adjoins it on the side facing away from the leading end, in this embodiment.
  • the inner diameter of the metric internal thread 28 is larger than the inner diameter of the inner profile 30 , so that a drive tool (not shown) can be guided past the internal thread 28 unhindered, in order to exert a torque by way of the inner profile 30 .
  • the embodiment of FIG. 3 allows for the use of a drive tool comprising a larger diameter, so that higher torques can be exerted.
  • the embodiment of FIG. 4 allows for an increased wall thickness of the grooving tip 26 , which promises a higher stability.
  • FIG. 5 shows an embodiment, in which the inner profile 30 and the metric internal thread 28 are embodied in the same axial section inside the grooving tip 26 .
  • the inner profile 30 and the internal thread 28 thus overlap here.
  • This embodiment can be significant in particular with regard to manufacture, namely when the grooving tip 26 or the threaded sleeve 20 , 22 is to be made of a drawn tube comprising an inner profile 30 , which then necessarily extends across the entire length of the grooving tip 26 or of the threaded sleeve 20 , 22 , respectively.
  • the internal thread 28 can additionally be cut into the inner profile 30 , into which the screw 24 can be screwed with its metric external thread 32 .
  • FIG. 6 shows an embodiment of a “massive” threaded sleeve 20 , i.e. a threaded sleeve 20 , which is made from continuous tubing.
  • the threaded sleeve 20 is preferably made of a drawn tube comprising an inner contour, which corresponds to the inner profile 30 (not shown in FIG. 6 ).
  • the external thread 31 can then be produced by forming, in particular by “grooving”. Alternatively, however, it is also possible to embody the external thread 31 by means of machining, in particular by means of hob peeling. If the internal thread 28 is embodied in the threaded sleeve 20 (not shown in FIG. 6 ), the said internal thread can also be produced by forming or by machining processes.
  • FIG. 9 shows four perspective views for illustration of a hob peeling process.
  • a threaded sleeve 20 is shown therein, which is rotated about its longitudinal axis 40 , wherein the direction of the rotation is shown by the arrow 42 .
  • a tool 44 which rotates (see arrow 48 ) about a tool axis 46 (see FIG. 9 c ) and which is furthermore moved in the direction of the arrow 50 parallel to the sleeve axis 40 , is also shown in FIG. 9 .
  • Reference numeral 52 identifies the region, in which the material is not yet peeled by the tool 44 .
  • the external thread 30 of the sleeve 20 can be produced comparatively quickly and cost-efficiently by means of hob peeling.
  • FIG. 7 shows an alternative embodiment of a threaded sleeve 20 , in which the sleeve 20 is wound from a tape 54 .
  • the tape is tightly wound, so that the edges of the tape 54 abut against one another on contact surfaces 56 , and a closed sleeve 20 results.
  • these contact surfaces 56 are arranged essentially normal to the longitudinal axis of the sleeve 20 .
  • the thread pitch of the external thread 31 can for example be embodied by means of rolling.
  • the metric internal thread 28 (not shown in FIG. 7 ) can also be embodied prior to the winding on the other side of the tape 54 .
  • Such a wound threaded sleeve 20 can be produced comparatively cost-efficiently.
  • FIG. 8 shows a modified form of the wound threaded sleeve 20 , which differs from the embodiment of FIG. 7 in that the contact surfaces 56 are no longer essentially normal to the longitudinal axis of the sleeve 20 , but are inclined to the longitudinal axis by an angle, which is more than 10°, preferably more than 25°, and particularly preferably more than 45°.
  • the threaded sleeve 22 can expand under strong axial tension, in that the contact surfaces 56 slide along one another as a result of a tension-induced deformation.
  • the anchoring effect can thus be intensified, in particular in cracked concrete.
  • threaded sleeves 20 , 22 are only disclosed as part of the system 18 of the invention in the present description and in the enclosed claims.
  • the threaded sleeves 20 , 22 described and claimed here can nevertheless also be used apart from the system 18 and thus have an independent significance and inventive quality.
  • the threaded sleeves 20 , 22 can be provided, for example, with an internal thread, in particular a metric internal thread 28 , which extends across the entire or the predominant portion of its length, and which serves to attach parts with the aid of a screw.
  • the massive threaded sleeve as is shown in FIG. 6 , can be made of carbon steel or stainless steel.
  • the inner profile 30 which serves for the power drive transmission of the screw-in torque, can extend across a portion, or across the entire length, of the inner contour.
  • the threaded sleeves 20 , 22 can be heat-treated at least partially, depending on the intended use, in particular in the region of the leading end or of the grooving tip 26 .
  • While the system 18 is aligned normal to the parting line 14 in FIGS. 1, 1 a and 2 , preferred uses of the system 18 and preferred methods for joining components 10 , 12 envisage the arrangement of the system 18 at an angle ⁇ , which differs from 90°, to the parting line 14 .
  • This angle ⁇ can be, for example, between 20° and 80°, preferably between 30° and 75°.
  • a non-normal arrangement is advantageous in particular when the component load parallel to the parting line 14 is at least as large as the stress normal to the parting line 14 .
  • a system 18 which is arranged normal to the parting line 14 , would be very strongly subjected to bending.
  • An inclined system i.e. a system, in which ⁇ does not equal 90°, can be subject to tensile load under these circumstances, with a significantly higher failure resistance as compared to the failure resistance when subjected to bending.
  • FIG. 11 shows a partially sectioned view of a simplified system, which, as shown in the Figure, can be used to join a first and a second component 10 , 12 , but which can also be used for the purpose of reinforcement (not shown).
  • the essential difference of this system 18 as compared to the above-described systems lies in that the system 18 comprises only one (first) threaded sleeve 20 .
  • this first threaded sleeve 20 is embodied to be longer than the first threaded sleeve 20 in the above-described systems 18 , which each included two threaded sleeves 20 , 22 , but this is not necessarily the case.
  • the threaded sleeve 20 has an internal thread, into which a threaded rod 23 is screwed.
  • a washer 58 which is clamped against the second component 12 with the aid of a nut, is attached to the threaded rod 23 . In this way the threaded sleeve 20 is clamped to the second component 12 .
  • the borehole 16 is also positioned at an angle, which does not equal 90°, to the parting line 14 between the first and the second component 10 , 12 .
  • FIG. 12 shows a side view and a cross-sectional view of a simplified system, which only comprises one (first) threaded sleeve 20 .
  • the clamping element 24 is formed by a screw comprising a screw head 34 , which in this case forms the leading end when it is inserted into the borehole 16 .
  • This system is assembled in such a manner that the clamping element 24 is first inserted into the borehole head 34 , and the threaded sleeve 20 is subsequently guided over the shaft of the screw (or is “threaded” onto the shaft, respectively), and is screwed into the component (not shown in FIG. 12 ).
  • the screw head 34 thereby forms a stop element for the first threaded sleeve 20 .
  • the clamping element 24 is clamped by tightening the nut 25 on the trailing end against the component 10 to be reinforced or—in the case of joining—against the second component 12 in the direction of the entrance to the borehole 16 , the threaded sleeve 20 abuts against the head 34 and is clamped in the direction of the entrance to the borehole (that is, to the right in the illustration of FIG. 12 ).
  • the advantage of this embodiment lies in the fact that the clamping element 24 can be secured to the first threaded sleeve 20 without having to embody an internal thread therein. The production of the threaded sleeve 20 is thus significantly simplified.
  • the stop element on the leading end of the clamping element 24 can be formed in any manner, wherein the screw head 34 only represents an example.
  • An alternative is shown in FIG. 13 , in which the clamping element 24 is formed by a threaded rod 23 , to the leading end of which a nut 25 is screwed as a stop element.
US16/472,114 2016-12-21 2017-12-21 System for joining or reinforcing components Abandoned US20200208422A1 (en)

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DE102016125201.8A DE102016125201A1 (de) 2016-12-21 2016-12-21 System zum Fügen oder Armieren von Bauteilen
PCT/EP2017/084230 WO2018115358A2 (de) 2016-12-21 2017-12-21 System zum fügen oder armieren von bauteilen

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US16/472,114 Abandoned US20200208422A1 (en) 2016-12-21 2017-12-21 System for joining or reinforcing components
US17/720,471 Pending US20230358063A1 (en) 2016-12-21 2022-04-14 Method for attaching mounted parts to concrete or masonry
US17/865,512 Pending US20230022176A1 (en) 2016-12-21 2022-07-15 System for joining or reinforcing components

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CN112982686A (zh) * 2021-01-26 2021-06-18 中国化学工程第三建设有限公司 一种梁柱钢筋接头处用预埋组件及方法
CN113305983A (zh) * 2021-06-15 2021-08-27 烟台聚通智能设备有限公司 一种生产加气板材的自动上扣系统
CN113846855A (zh) * 2021-10-14 2021-12-28 上海建工集团股份有限公司 一种预制构件快速吊装就位连接件
CN114211764A (zh) * 2021-12-14 2022-03-22 沈阳智勤机器人系统工程有限公司 一种适用于加气砖生产线网笼卡扣安装的自动化系统

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WO2018115358A3 (de) 2018-08-30
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CN110249142A (zh) 2019-09-17
CN110234893A (zh) 2019-09-13
US20230358063A1 (en) 2023-11-09
WO2018115358A2 (de) 2018-06-28
EP3559484B1 (de) 2022-07-20
WO2018115364A1 (de) 2018-06-28
DK3559484T3 (da) 2022-10-24
ES2928225T3 (es) 2022-11-16
EP3365564A1 (de) 2018-08-29
US20230022176A1 (en) 2023-01-26
EP3559484A2 (de) 2019-10-30

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