Classifications

• • 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
  • F16B13/00—Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose
  • F16B13/04—Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose with parts gripping in the hole or behind the reverse side of the wall after inserting from the front
  • F16B13/06—Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose with parts gripping in the hole or behind the reverse side of the wall after inserting from the front combined with expanding sleeve
• • 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
  • F16B13/00—Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose
  • F16B13/14—Non-metallic plugs or sleeves; Use of liquid, loose solid or kneadable material therefor
  • F16B13/141—Fixing plugs in holes by the use of settable material
• • 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
  • F16B13/00—Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose
  • F16B13/002—Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose self-cutting
  • F16B13/003—Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose self-cutting with a separate drilling bit attached to or surrounded by the dowel element
• • 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
  • F16B13/00—Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose
  • F16B13/04—Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose with parts gripping in the hole or behind the reverse side of the wall after inserting from the front
  • F16B13/06—Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose with parts gripping in the hole or behind the reverse side of the wall after inserting from the front combined with expanding sleeve
  • F16B13/061—Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose with parts gripping in the hole or behind the reverse side of the wall after inserting from the front combined with expanding sleeve of the buckling type
• • 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
  • F16B13/00—Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose
  • F16B13/14—Non-metallic plugs or sleeves; Use of liquid, loose solid or kneadable material therefor

Definitions

• the invention relates to an expansion anchor according to the preamble of claim 1.
• Expansion anchors are known in a variety of forms and are used, for example, to stabilize walls, to form fastening points for attachment, in particular to suspend objects, etc. They can be inserted into an existing hole in a wall or rammed into the wall or the floor , whereby the relative displacement of moving parts of the expansion anchor - as a rule in the area of the borehole base - causes an expansion, in particular an increase in the diameter of the parts located here, which results in a state of tension relative to the substance of the walls of the borehole and in this way a fixation of the anchor enables.
• an expandable screw fastening device is known, the essential feature of which consists of two expansion tubes made of plastic, which are coaxially guided one inside the other and surround a screw and are axially clamped between a nut on the one hand and in the area of the screw head on the other hand .
• Both expansion tubes are provided with a series of slots, each of which delimit U sections and can have an axial or a helical winding arrangement.
• the outer expansion tube is in particular axially acting with the nut
• the inner expansion tube forms a limitation for the screwing-in process of the screw mentioned, which is largely determined by the length of the axial slots of this expansion tube shown in the exemplary embodiment.
• the spreading device consists of an arrangement of at least two nested expansion pipes, each of which is provided with slots, between which strip-like peripheral sections thus remain, so that the peripheral sections remaining between the slots are expanded radially by means of an axial compression, with plastic deformation , so that the plastically deformed peripheral sections form a spatial structure that represents an anchoring body.
• SPARE BLADE SPARE BLADE (RULE 26) are tiert, with comparatively steep turns are preferred.
• the plastically deformed peripheral sections form a spatial structure which is distinguished by considerable rigidity and strength, both against axial and torsional stresses.
• the expansion body In the expanded state, there is a largely rotationally symmetrical expansion body which can be approximated to a disk or spherical shape in accordance with the degree of expansion and is characterized by a high degree of mechanical stability.
• three and more expansion tubes which are coaxially nested in this sense can also be provided, so that in the event of axial compression of this arrangement, the peripheral sections of three or more expansion tubes are expanded radially and form an expansion or anchoring body.
• the expansion tubes are preferably made of metal, but they can equally well consist of a suitable plastic. It is also essential to the invention that the
• the expansion tubes can either be formed as smooth-walled tubes or also as threaded tubes.
• this thread In the case of training as threaded pipes, there are naturally many possibilities for using this thread, for example to improve anchorage in the ground or in the case of mortaring with mortar or another medium capable of hardening.
• the thread design also has the advantage that this thread can optionally be used for screwing purposes, for example for attaching a terminating body, a driving tip, a drill head or another functional element via which one end of the expansion tubes, if necessary, with the Pull element can be brought into a fixed connection.
• All expansion tubes of an inserted arrangement preferably have the same length and the expansion tubes can extend over a partial length of the tension element, but also over its entire length. In the former case, special intermediate elements for power transmission are required, which will be discussed in more detail below.
• the expansion anchor according to the invention is based on the principle that the at least one axial arrangement of expansion tubes plugged into one another must be subjected to an axially effective compressive force in order to carry out the expansion process of the circumferential sections mentioned, this compressive force being caused by an axial relative movement of the
• such a driving tip together with an annular shoulder, can also be provided by an upsetting process as part of a forging process.
• This annular shoulder forms the force transmission element which is oriented towards exerting a compressive force on the system of the expansion tubes, wherein a mounting tube may optionally be provided between the expansion tubes and this annular shoulder, since the system of the expansion tubes basically at any point along the Tension element can be seen.
• the mounting tube can only be supported on the expansion tubes. However, it can also be fixed with the facing end of the spreader tubes Are connected, in particular welded.
• the spreader tubes can also be firmly connected at one end to the central tension element.
• the expansion tubes have a circular cross section.
• a plurality of arrangements of nested expansion tubes can be provided along the tension element, wherein assembly tubes can optionally be provided as force transmission elements between the arrangements. In this way, there is the possibility of going along a
• the assembly tubes can be in a fixed connection with the expansion tubes.
• the expansion tubes - as seen along their axial extension - can also be equipped with more than one slot arrangement, so that after the respective peripheral sections have been expanded, there are a plurality of expansion bodies arranged axially at a distance from one another.
• claims 14 to 15 are directed to different configurations of the tension element, which can be designed as a solid or threaded rod or as a tubular body, preferably provided at least with a continuous external thread.
• Radial bores are preferably located in the areas which are directly associated with the expandable peripheral sections of the expansion pipes, so that when used as an injection drill anchor, further expansion of the expansion body occurs via the mortar emerging at these points or the other hardenable medium.
• the tension rod arranged within the expansion tubes can function as the actual tension element.
• the system of the expansion tubes or a mounting tube that is firmly connected to them can serve as a tension element.
• the features of claim 22 are directed to the provision of reproducible deformation ratios and to the provision of a spreading or anchoring body of high strength. It is important here that the stripe-like peripheral sections intersect in a central region at an angle of oC ⁇ _ 90. This means that due to the strip-like design of the peripheral sections
• Spreading body each has an optimal, design-related resistance to such bending stresses, the bending axes of which run parallel to the melt sides of the cross sections of the expanded circumferential sections. At the same time, this orientation of the expanded peripheral sections results in a stiffening of the expansion body in relation to radial stresses, which in turn is caused by design.
• the named angle • • -> is preferably greater than 30,
• REPLACEMENT BLA ⁇ (RULE 26) a range of 45 to 90 is preferred
• Figure 1 shows a first embodiment of an expansion anchor in partial longitudinal section.
• FIG. 2 shows a view of the outer expansion tube of the expansion anchor according to FIG. 1;
• FIG. 3 shows the inner expansion tube of the expansion anchor according to FIG. 1;
• Fig. 4 is a radial section of the expansion tube of Figure 3 according to a section plane IV-IV.
• FIG. 5 shows a radial section of the expansion tube according to FIG. 2 corresponding to a section plane V-V;
• FIG. 6 shows a representation of an alternative embodiment of a tension member of the expansion anchor according to FIG. 1;
• FIG. 8 is a view according to arrow VIII of FIG. 7.
• FIG. 1 denotes a tension element, " here a threaded rod, which has one end 2 with a pre- drive tip 3 is provided.
• the propulsion tip 3 can be designed as an insulated body and screwed to this end of the threaded rod. However, it can equally well be welded to this end. Finally, it is also possible to forge the tip 3 in a forging process at the end 2 of the threaded rod 1. It is essential that in each case there is an annular shoulder 4 in the area of the propulsion tip, namely on the rear side thereof, which forms a support surface for two expansion tubes 5, 6 arranged coaxially one inside the other. Both expansion pipes, namely the outer 5 and the inner 6 are provided with slots in a manner to be explained in more detail below, namely within a region 7 and, moreover, formed as a smooth-walled tubular body.
• the inside diameter of the inner expansion tube 6 and the outside diameter of the threaded rod 1 are dimensioned such that both expansion tubes 5, 6 can be pushed easily over the threaded rod 1 until they rest against the annular shoulder 4 while leaving a slight play.
• Both expansion tubes 5, 6 have the same length and form on their end facing away from the driving tip 3 an annular sleeve 4 ', the radial thickness of which essentially corresponds to the common wall thickness of the expansion tubes 5, 6.
• the Sp Schwarzrohre 5,6 are at their end portions 7, 7, with each other in a solid compound which can be provided in any manner.
• a mounting tube is designated, which is axially supported on the ring shoulder 4 'and in its wall thickness essentially the dimensions of this ring shoulder
• the mounting tube 8 extends over the entire remaining length of the expansion anchor and is fastened at its end facing away from the annular shoulder 4 'to an armature disk 9 in a suitable manner.
• a firm connection, in particular welding, can exist between the mounting tube on the expansion tubes.
• the armature disk 9 the shape of which can in principle be of any design, has a bore 10 which is coaxial to the common axis of the mounting tube 8 and of the threaded rod 1. Des, the heading tip 3 turned away
• the expansion tubes 5, 6 are provided with a series of slots 5 ', 6', which have a helically wound, comparatively steep arrangement with respect to the axis of the respective expansion tube.
• the end points of each slot are located on circumferential lines, the spacing from one another of which corresponds to the area 7 mentioned, this area for the slots of the inner expansion tube being able to be dimensioned slightly shorter.
• the number of slots 5 ', 6 * present in the two expansion tubes is the same and that the slots - viewed in the circumferential direction - are uniformly distributed and that the circumferential sections 5'', 6 *' mentioned have uniform width dimensions.
• the slots can also be designed in such a way that the width dimension of the peripheral sections increases in one direction.
• the pitch dimensions of the helical turns of the slots 5 ', 6' run in opposite directions to one another.
• the peripheral sections 5 ′′, 6 ′′ are preferably arranged in such a way that their respective central regions are tangent in the spread state and exert a supporting effect on one another.
• Circumferential sections B '* ⁇ ' 1 of two spreader tubes 5.6 each run opposite one another. In connection with the arrangement of these end regions 7, 7 ′′ fixed to one another, there are clear and, in particular, reproducible deformation ratios.
• this area 7 can have a length of, for example, 140 mm.
• the pitch of the slots of the outer expansion tube 5 can be designed with a tube outer diameter of 42.4 mm and a wall thickness of 3.6 mm so that each slot - from one end to the other end over an angle of approximately 201.25 extends.
• the associated inner expansion tube can have an outer diameter of 33.7 mm and a wall thickness of 3.6 mm, the pitch of the
• Slots are dimensioned such that they have a twist of approximately 102 ° from one end to the other end. However, these are only examples to be understood dimensions, which can of course be adapted to the individual case.
• An expansion anchor equipped in this sense is intended for this purpose, into a wall, the ground or the like to be driven in until the armature disk 9 lies against the outside of the wall.
• the expansion anchor has a length 11.
• the threaded rod 1 is moved in the direction of arrow 12 relative to the system of assembly tube 8 and expansion tubes 5, 6, and without these parts being rotated relative to one another.
• This can be achieved, for example, by means of a hydraulic tensioning device which is supported on the one hand on the armature disk 9 and which on the other hand detects the end of the threaded rod 1 protruding from the armature disk.
• Structure takes on a spherical or disk-like shape depending on the degree of expansion, so that there is a particularly strong bond with the surrounding soil.
• the system of the expansion tubes 5, 6 is at the bottom, i.e. the propulsion tip immediately adjacent end of the expansion anchor.
• the system of the expansion anchors can be arranged at any point along the threaded rod 1, further mounting tube elements possibly being present on the propulsion tip, which only have an axial support function in this respect.
• two or more systems of coaxially nested expansion tubes can be provided.
• the threaded rod can be lengthened in a simple manner by means of threaded sockets for the purpose of length adjustment and, if necessary, due to its thread extending uniformly over its entire length, it can also be cut to intermediate lengths which are adapted to the individual case.
• a further variant of this exemplary embodiment can lie in the fact that the assembly tube is not distinguished from the system of the expansion tubes and that the expansion tubes therefore extend over the entire length of the expansion anchor and only on one or more, arbitrarily placed sections with the system of the slots outlined above.
• the pitch of the slots can also be varied within wide limits, starting from slots that run axially parallel or almost axially parallel to slots that have only a comparatively slight slope.
• the starting point for the question of dimensioning the pitch dimension, but also the relative arrangement of the circumferential sections of the expanding tubes, is that the spreading circumferential sections should exert an optimal supporting and stiffening effect on one another, a spherical or disk-shaped expanding body should be approximated as possible .
• the slopes of the slots of adjacent expansion tubes are designed in such a way that the expanded peripheral sections extend at angles to one another in their central region. This means to you that preference is given to relatively steep, counter-rotating thread pitches of the at least two expansion tubes.
• the tension element was shown above as threaded rod 1, thus as a solid rod. This is also not mandatory.
• the expansion anchor according to the invention can be used at the same time as a boring bar, the central longitudinal bore 13 being used for guiding a flushing agent which emerges via suitable bores in the region of the drill head and / or in the region of the tubular body 14 and / or in the region of the expanding pipes, which as a result of the drilling process loosely takes up and rinses out through the annular space between the outside of the tubular body 14 and the inside of the drilling hole.
• each drilling head usually used for such boring bars and provided with rinsing bores can be used, so that a graphical representation of the drilling head can be dispensed with.
• this opens up the possibility of using the expansion anchor in the manner of an injection drill anchor or self-drilling anchor.
• the expansion anchor remains in the bore as a "lost tool" after the bore has been created, with a mortar suspension or other medium capable of curing, for example synthetic resin, via the longitudinal bore 13 and the system of outlet bores in the region of the drill head and / or the tubular body 14 is introduced into the borehole, which fills the annular space between the outside of the tubular body 14 and the inside of the borehole, penetrates in particular into existing crevices or the like and in this way produces a reliable bond with the surrounding mountains or other substance .
• This introduction of mortar can be effected simultaneously or immediately after the spreading process outlined above, so that in particular the spread area is equally integrated in the hardenable medium, so that the result is a particularly reliable bond with the surrounding borehole substance.
• Corrosion protection of the expansion anchor can be effected in different ways.
• the outside of the tension element namely of the threaded rod 1 or of the tubular body 14
• parts of the expansion anchor that are not covered with plastic or that are not integrated in a hardenable medium can be made of stainless steel.
• the system of the expansion pipes does not necessarily have to be incorporated into a substance, for example the soil. This can equally be provided on the air side to form an abutment, in which case a maximum expansion is aimed at to form a disc-like expansion body, so that a connection of two components that are connected to one another via the expansion anchor is connected via a screw connection of the tension element to the armature disc , is possible.
• the central tension element has a double corrosion protection in that on the one hand the outer tube is embedded in mortar and on the other hand the latter is filled with mortar in which the tension element is embedded.
• the expansion process can in principle also be brought about by torsion of the system of the expansion tubes.
• the peripheral sections 5 ′′, 6 ′′ extend perpendicular to one another in their central region, which is also the region of maximum radial spreading. This is an extreme case and the cutting angle can also be smaller, for example 45 °. It is essential, however, that the circumferential section 5 ′′ results in an optimal rigidity with respect to bending stresses, the direction of action of which is perpendicular to the plane of the drawing in FIG. 7, whereas the peripheral section 6 ′′ has a rigidity with respect to such bending stresses, the Direction of action lies in the plane of the drawing in FIG. 7.
• the circumferential section 6 ′′ exerts a stiffening effect on the profile of the circumferential section 5 * ′, as a result of which its shape is stabilized in particular with respect to radial directions of stress, that is to say in the direction of the arrow 15. Further stiffeners due to design can be provided by further stiffeners in the drawing. 7 circumferential sections not shown can be reached within the circumferential section 6 ′′.
• Fig. 8 shows only an example of the cutting angle - ⁇ , the orientation of the peripheral portions 5, 6 '' biggest in the example shown in Fig. 7 range of radial spreading.
• the drawing also illustrates the directions of the greatest possible bending strength of the expansion body formed in this way.
• the aim of the invention is therefore to provide a spreading body in each fur, the rigidity of which is largely determined by the design.
• the spread section can also be used as an abutment against a wall.

Landscapes

• Engineering & Computer Science (AREA)
• General Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Piles And Underground Anchors (AREA)
• Dowels (AREA)
• Joining Of Building Structures In Genera (AREA)

Applications Claiming Priority (3)

Publications (1)

Family

ID=6484538

Family Applications (1)

Country Status (10)

Families Citing this family (43)

Family Cites Families (14)

• 1993
  • 1993-04-05 DE DE4310796A patent/DE4310796C2/de not_active Expired - Fee Related
• 1994
  • 1994-03-17 CN CN94191688A patent/CN1036731C/zh not_active Expired - Fee Related
  • 1994-03-17 WO PCT/EP1994/000841 patent/WO1994023216A1/de not_active Ceased
  • 1994-03-17 KR KR1019950704336A patent/KR960702067A/ko not_active Withdrawn
  • 1994-03-17 EP EP94911909A patent/EP0693161A1/de not_active Withdrawn
  • 1994-03-17 CA CA002158339A patent/CA2158339A1/en not_active Abandoned
  • 1994-03-17 AU AU64274/94A patent/AU674575B2/en not_active Expired - Fee Related
  • 1994-03-17 JP JP6521610A patent/JPH08510533A/ja not_active Ceased
  • 1994-03-17 US US08/525,692 patent/US5820321A/en not_active Expired - Fee Related
  • 1994-03-18 TW TW083102361A patent/TW253004B/zh active

Non-Patent Citations (1)

Also Published As

Similar Documents

Legal Events