• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    An armature tensioning device (1) for pretensioning and / or checking the prestressing of an armature (3) fixed in a geological formation (2) in a longitudinal direction {4) of the armature (3), the armature tensioning device (1) comprising at least one tensioning element (5 ), preferably a clamping nut, and at least one threaded carrier body (6) with an anchor fixing (7), for fastening the threaded carrier body (6) on the armature (3}, and at least one clamping thread {8), wherein the clamping element (5) in the Clamping thread (8) engages and the clamping element (5) and the clamping thread {8) for pre-tensioning and / or for checking the bias of the armature (3) are rotatable relative to each other.
    公开号:AT518948A1
    申请号:T349/2016
    申请日:2016-07-27
    公开日:2018-02-15
    发明作者:
    申请人:Htb Baugesellschaft M B H；
    IPC主号:
    专利说明:

    Summary
    Anchor tensioning device (1) for prestressing and / or for checking the prestressing of an anchor (3) fixed in a geological formation (2) in a longitudinal direction (4) of the anchor (3), the anchor tensioning device (1) having at least one tensioning element (5 ), preferably a tension nut, and at least one
    Thread carrier body (6) with an anchor fixation (7), for fastening the
    Thread carrier body (6) on the armature (3), and has at least one clamping thread (8), the clamping element (5) engaging in the clamping thread (8) and the clamping element (5) and the clamping thread (8) for pretensioning and / or Checking the bias of the armature (3) can be rotated relative to each other.
    (Fig. 1) / 28
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    patent attorneys
    Hofmann $ <Fechner
    Dr. Ralf Hofmann Dr. Thomas Fechner Hörnlingerstr. 3, P.O.Box 5 6830 Rankweil, Austria
    T +43 (0) 5522 73 137 F +43 (0) 5522 73 137-10 M office@vpat.at I www.vpat.at
    27431/34 / ss 20160616
    The present invention relates to an anchor tensioning device for prestressing and / or for checking the prestressing of an anchor fixed in a geological formation in a longitudinal direction of the anchor.
    To secure geological formations such as Slopes of slopes,
    Rock walls or the like and / or for securing stems or superstructures on such geological formations, it is known in the prior art to fix anchors in the geological formation in order to support the geological formation itself and / or the geological formation and / or fixed
    Secure the structure or stem by means of an anchor plate which is held on the anchor by means of an anchor head nut. For this purpose, the anchors must be prestressed in the geological formation. The preload must also be checked occasionally. In addition come generic
    Anchor tensioning devices for use. In the prior art, these include
    Anchor tensioning devices are usually hydraulic presses, which are actuated by means of a manually or motor-driven pump or another pressure source in order to be able to carry out the pretensioning or checking the pretension. The overall equipment used for this in the prior art as an anchor tensioning device is very extensive, difficult and lengthy to assemble.
    The object of the invention is to propose an alternative anchor tensioning device which can be as light and simple as possible and which can also be operated.
    To achieve the object, an armature tensioning device of the type mentioned above is proposed, in which it is provided according to the invention that the armature tensioning device has at least one tensioning element, preferably a / 28
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    Clamping nut, and at least one threaded support body with an anchor fixation, for fastening the threaded support body to the anchor, and has at least one clamping thread, the clamping element engaging in the clamping thread and the clamping element and the clamping thread for prestressing and / or for checking the prestressing of the anchor rotatable relative to one another are.
    Through the interaction of the tensioning element and
    Clamping threads can be provided with a force step-up or step-down, so that the armature tensioning device according to the invention ultimately preloads and / or checks the preload of an armature using a hand-operated tool such as e.g. a simple wrench, torque wrench or cordless screwdriver. As a result, the hydraulic presses previously required, including a suitable pump or other pressure source, can be dispensed with. This provides, according to the invention, a very simply constructed and universally and easily usable anchor tensioning device, which can also be used by a single person even in inaccessible terrain for prestressing and / or for checking the prestressing of an anchor fixed in a geological formation. The anchor tensioning device according to the invention can be carried out with few parts and with low weight. It is versatile and easy to use. It can be manufactured at low manufacturing costs and operated by just one person.
    The pretension is a mechanical tension which is applied to the anchor so that it can assume the desired supporting function on the geological function and / or the structure supported and / or fixed thereon.
    The terms of checking the prestress and the anchor fixed in a geological formation are to be interpreted broadly. Checking the preload can e.g. as part of the implementation of acceptance and suitability tests. The term anchor, for example, also nails, posts and others / 28
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    , ·· ···· ·. ...: .. ·:
    Types of anchors.
    The threaded support body of the anchor tensioning device according to the invention can be made in one piece, but can also consist of several parts. In any case, it has on the one hand an anchor fixation with which the threaded support body can be attached to the anchor. On the other hand, the thread carrier body also has the already mentioned clamping thread. This is a thread which interacts with the tensioning element for prestressing and / or for checking the prestressing of the anchor.
    The clamping element can e.g. are a simple clamping nut which engages in the clamping thread. Other components and bodies that can interact with the clamping thread are also possible as a clamping element. The clamping thread can e.g. be designed as an external thread. Then it makes sense that the clamping element is a clamping nut screwed onto the clamping thread. However, it is also conceivable to run the other way round. The clamping thread can therefore also be an internal thread in the thread carrier body. The clamping element can then be a threaded rod or the like, which engages in this clamping thread in the form of an internal thread.
    When operating the anchor tensioning device, both the tension thread of the threaded support body and the tensioning element can be rotated. The other of these two components is then advantageously fixed, that is, not rotatably arranged.
    The anchor fixation is used to attach the threaded carrier body to the anchor. In principle, it can be designed in different ways. For example, the anchor fixation can also be designed as a clamp for clamping the threaded support body to the anchor. Since the anchors used in the prior art often have a thread themselves, the so-called anchor thread usually in the form of an external thread, it is appropriate that the anchor fixation of the / 28
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    Thread carrier body has an anchor-side thread for screwing the thread carrier body onto the anchor. This anchor-side thread can, after the anchor thread is usually an external thread on the anchor, e.g. be designed as an internal thread in the thread carrier body. The tension thread advantageously has a smaller thread pitch than the anchor-side thread. A thread pitch is understood to mean the path covered by one revolution of the thread. The anchor pitch can also be called the pitch. It describes the distance between two adjacent thread tips or combs, usually in millimeter units.
    While the thread pitch of the anchor thread present on the anchor is generally from 8 mm to 21 mm, preferably from 12.7 mm, the tension thread advantageously has a thread pitch from 0.5 mm to 8 mm, particularly preferably from 1.0 mm to 2.0 mm, on.
    The anchor fixation and the tension thread, which are both parts of the
    Form thread carrier body can be rotatably connected to each other. Embodiments are also conceivable in which the clamping thread is rotatable relative to the anchor fixation. This is particularly useful when the clamping element interacting with the clamping thread is mounted in a rotationally fixed, ie non-rotatable, manner.
    In preferred embodiments, the tension thread and the anchor fixation are advantageously arranged coaxially with one another. In preferred embodiments, this applies in particular when the anchor fixation has an anchor-side thread for screwing the thread carrier body onto the anchor.
    In particular, if the tensioning element is to be rotated during pretensioning or when checking the pretensioning, it makes sense for the tensioning element to have a tool adapter for fastening a turning tool to the tensioning element. As already explained at the beginning, the turning tool can advantageously be operated by hand and preferably by only one person. With the turning tool / 28
    27/07/2016 12:50 No .: R339 L1
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    27/07 2016 12:40 FAX +43 5522 7313710 Hofmann & Fechner ®0010 / 0032 it can e.g. a simple wrench, a torque wrench but also a cordless screwdriver, possibly with a corresponding power multiplier or torque converter. In simple designs, the tool adapter can e.g. as a
    An external polygon or an internal polygon can be made, as is known from ordinary nuts or Allen keys. In particular, if the clamping thread or the thread carrier body has to be rotated during the clamping or checking process, it can also be provided that the thread carrier body has a tool adapter that is non-rotatably connected to the clamping thread and to which a turning tool can be attached. The turning tools already mentioned above can also be used here, so that the tool adapter is advantageously designed accordingly.
    Preferred embodiments of the invention provide that the
    Anchor tensioning device at least one support device for supporting the
    Has clamping element and / or the threaded support body on the geological formation or a structure supported and / or fixed to the geological formation. Such support devices could also be referred to as a press chair. The support device can e.g. be sleeve-shaped or tubular. Designs with two, three or more legs are also possible. In any case, the support device advantageously has an inner region through which the armature can be guided. It is particularly favorable if the support device has at least one opening which has access to an anchor head nut screwed onto the anchor in the inner region of the
    Support device allows. This makes it possible to tighten the anchor head nut after the pretensioning or checking process has ended, although the anchor tensioning device is still mounted on the anchor
    In order to keep the frictional forces during the tensioning process, that is to say when the tensioning element and tensioning thread are rotated relative to one another, as low as possible, preferred embodiments of the invention provide that the armature tensioning device has at least one axial bearing for reducing the frictional forces / 28
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    .........
    between the clamping element or the thread carrier body on the one hand and the support device on the other hand when the clamping element and the clamping thread are rotated relative to one another. to be an axial cylindrical roller bearing or an axial ball bearing. The axial bearing in any case allows support in the longitudinal direction of the armature and reduces the frictional forces when the tensioning element and the tensioning thread are rotated relative to one another, around this longitudinal direction of the armature.
    Since the anchors are not always installed or run normally or orthogonally to a surface of the geological formation or the structure supported and / or fixed to the geological formation surrounding the anchor, preferred anchor tensioning devices according to the invention see a way of compensating for an angle deviating from the orthogonal angle on. In this context, preferred embodiments of the invention provide that the anchor tensioning device has an angle compensation device for adapting the support device to an angle between the longitudinal direction of the anchor fixed in the geological formation and a surface of the geological formation surrounding the anchor or a surface supported and / or supported on the geological formation. or has a fixed structure. Is the support device e.g. designed as a two-, three- or multi-leg, an angle compensation device can be integrated into the support device, in that the legs of the support device can be individually adjusted in length and / or arrangement relative to one another. In particular in the case of tubular or sleeve-shaped support devices, correspondingly wedge-shaped lower and insert parts can also be used as the angle compensation device.
    In order to be able to check, preferably continuously, the tensile stresses acting on the armature during pretensioning or checking the pretensioning, preferably continuously, preferred variants of the invention provide that the armature tensioning device has at least one measuring device for measuring the pretension in the longitudinal direction of the anchor between the
    Clamping element and the geological formation, preferably between the / 28
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    Has clamping element and the support device. Suitable measuring devices are known per se. You can e.g. have a correspondingly compressible volume, which is filled with a liquid and connected to a pressure gauge.
    In addition, if required, a distance measurement can also be used with a distance measuring device known per se in the prior art when prestressing the armature and / or checking the prestressing of the armature.
    The threaded support body of the anchor tensioning device according to the invention can be a sleeve or at least have a sleeve. For example, be provided that the clamping thread is designed as an external thread on the sleeve. It is just as well possible that the clamping thread is designed as an external thread on a threaded rod of the threaded support body connected to the sleeve. The thread on the anchor side, if present, can e.g. as an internal thread of the sleeve, but of course basically also be designed as an external thread of the sleeve.
    It is generally pointed out that it is known in the prior art to secure a wide variety of geological formations by means of appropriate anchors. Such geological formations can e.g. Embankments with loose and / or rock material, other slopes and rock walls and the like. Anchors are often used to secure a structure supported and / or fixed to the geological formation. The structure could also be called a stem. In the construction or stem, it can e.g. are concrete shells, in particular shotcrete shells or other bodies which are applied to and / or supported on the geological formation to secure them. Usually anchor rods or anchor tubes are used as anchors. It is therefore usually a longitudinal body, which is fixed in the geological formation, in particular in boreholes or blasting holes in the geological formation. This fixation can, for example, as is known per se in the prior art, using press mortar or the like in FIGS
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    corresponding drill holes or blasting holes. The anchors known in the prior art frequently have an anchor thread in the form of an external thread. The anchor head nuts known per se can then be screwed onto this anchor thread. This anchor thread can also be used to attach the
    Thread carrier body are used on the anchor if it has a corresponding anchor-side thread as anchor fixation or at least as part of the anchor fixation.
    With the anchor tensioning devices according to the invention, the usually 10 required tensioning forces in the range from 120 kN to 500 kN can be easily applied, in that, depending on the application, correspondingly small thread pitches are realized in the tension thread.
    Further features and details of preferred embodiments of the invention are described below by way of example using various
    Embodiment variants of the invention explained. Each shows in schematic representations:
    1 shows a first exemplary embodiment according to the invention of an armature tensioning device with a measuring device;
    FIG. 2 shows the embodiment variant according to FIG. 1 without the measuring device;
    FIG. 3 shows an exploded view of the variant according to FIG. 1;
    FIG. 4 the embodiment variant according to FIG. 1 supplemented by an angle compensation device;
    Figure 5 shows an embodiment of an anchor tensioning device with a support device in the form of a bipod.
    6 shows the use of the exemplary embodiment according to FIG. 5 for angle compensation; 7 shows a further exemplary embodiment of the invention with a measuring device; 8 shows the variant according to FIG. 7 without a measuring device;
    Fig. 9 is an exploded view of Fig. 7 and
    Fig. 10 shows another embodiment of the invention.
    / 28
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    In the first embodiment shown in FIG. 1, as in the others
    Exemplary embodiments, a situation is schematically shown in a sectional view, in which an anchor 3 designed as a rod is fixed in a geological formation in order to have a structure 11 fixed to the geological formation 2 e.g. secure in the form of a concrete facing. The geological formation 2 can e.g. are rock or loose material or mixtures thereof. The anchor 3, as shown schematically here, is often fixed in a borehole 24 drilled into the geological formation 2 by means of grout or the like. The front end of the armature 3 is freely accessible via the geological formation 2 and the structure 11. At least the free end of the armature 3, possibly the entire armature 3, carries an anchor thread 23 in the form of an external thread. The anchor plate 25 held by the anchor 3 and pressed against the structure 11 or the geological formation 2 is, as is known per se, secured and held in place by an anchor head nut 14 screwed onto the anchor thread 23. Deviating from the exemplary embodiments shown here, e.g. if the geological formation 2 is a rock wall, no structure 11 may also be provided, but the anchor plate 25 is pressed directly against the rock of the geological formation 2. Of course, the variant of the structure 11 shown here in the form of a concrete facing is also only an example. With the anchors 3 shown here, other concrete or steel bodies or the like can also be pressed against a geological formation 2.
    In order to be able to fully develop its supporting function, the anchor 3 must be pressed against the geological formation 2 and the structure 1 which may be present there with a prestress. In order to be able to generate and / or check this preload, the anchor tensioning devices 1 according to the invention described below can be used.
    The first exemplary embodiment of such an anchor tensioning device 1 according to the invention is shown in FIG. 1 in the operating position mounted on the anchor 3, in which the prestress can be applied and / or checked. Fig. 3 shows the individual parts of this embodiment in an exploded view.
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    The thread support body 6 of the anchor tensioning device 1 according to the invention of this first embodiment is designed in two parts. It encompasses the sleeve 21 and the threaded rod 22 fixed in it in this embodiment by means of a fastening screw 26. The sleeve 21 is in the sleeve 21
    Embodiment realized the anchor fixation 7 in the form of an anchor-side thread 9. This anchor-side thread 9 is designed in this embodiment as an internal thread in the sleeve 21 and thus in the threaded support body 6. With this anchor-side thread 9, the sleeve 21 and thus the entire threaded support body 6 can be screwed onto the anchor thread 23 and thus onto the anchor 3 and fastened there. If this is not already done by the frictional forces between the anchor-side thread 9 and anchor thread 23, an additional fixation can be achieved by means of the fastening screw 26 in the area of the anchor-side thread 9 in order to secure the threaded carrier body 6 on the anchor 3 in a manner secure against rotation.
    In this exemplary embodiment, the clamping thread 8 is embodied on the threaded rod 22 as an external thread. The tensioning element 5, which engages in the tensioning thread 8 for prestressing and / or for checking the prestressing of the armature 3, is a tensioning nut in the exemplary embodiment shown here. This clamping element 5 is by means of the support device 10, which is tubular here, and in this exemplary embodiment, with the interposition of the compensating plates 27, the force measuring device 19, the axial bearing 12, the retaining ring 28, the fitting sleeves 29 and the washer 30, which are shown individually in the exploded view according to FIG. 3 Support against the anchor plate 25 on the structure 11 and thus on the geological formation 2 in the longitudinal direction 4 of the anchor 3. The retaining ring 28 holds the thrust bearing 12 in the compensating plate 27 assigned to the thrust bearing 12. The support device 10, which is of tubular design here, has an inner region 15 in the form of a cavity, in which, in the operating position shown in FIG the geological formation 2 projecting end of the anchor 3 and the anchor head nut 14 are. The support device 10 has at least one opening / 28
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    13, in the embodiment shown two opposing openings 13, which enables access to the anchor head nut 14 screwed onto the anchor 3 in the inner region 15 of the support device 10.
    The clamping element 5 designed here as a clamping nut has one
    Tool adapter 20 on which a turning tool, preferably a hand-operated one, can be attached. The tool adapter 20 can e.g. the known polygonal outer contour of an ordinary clamping nut. Ordinary wrenches, torque wrenches or the like can then be used as the turning tool in order to be able to turn the clamping element 5 on the clamping thread 8 of the thread carrier body 6. The turning tool can therefore be placed directly on the tool adapter 20 of the clamping element 5 in order to rotate the clamping element 5. However, it is also conceivable, as shown in FIG. 1, to first place a socket wrench 31 on the tool adapter 20 of the clamping element 5 in order to then engage the tool adapter 20 of the socket wrench 31 with the turning tool. In addition to the wrenches and torque wrenches mentioned above, other turning tools, in particular those that can be operated by hand, can also be used as turning tools. Cordless screwdrivers may be mentioned as an example of this, optionally with torque translators known per se in the prior art.
    In order to generate the desired prestress on the armature 3, the tensioning element 5, which is supported on the geological formation 2 or the structure 11 in the longitudinal direction 4 of the armature 3 by means of the support device 10, is rotated relative to the tensioning thread 8 by means of a suitable turning tool. By selecting the appropriate direction of rotation, the tensile stress on the armature 3 in its longitudinal direction 4 can be increased or decreased accordingly. The axial bearing 12 thereby reduces the frictional forces that arise when the clamping element 5 is rotated. The tensile stress currently applied to the armature 3 in the longitudinal direction 4 of the armature 3 can be read off via the measuring device 19 during the tensioning process. Suitable measuring devices 19 are known in the prior art. For example, around a cavity / 28 delimited by two outer walls
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    Hofmann & Fechner @ 10017/0032 ····· · · · · * · · · · · ··· ··· · · ··· · · · · • · · · ··· · · ·· · · · · ··· ···· act in which a suitable, pressure-transmitting liquid is arranged. The pressure acting on this pressure chamber and thus the preload is then displayed via a correspondingly connected pressure gauge. Whether a pressure or a voltage or a force is indicated by a corresponding scaling can be chosen freely in the implementation of the invention. If the desired pretensioning on the armature 3 has been achieved by a corresponding turning of the tensioning element 5 on the tensioning thread 8, an appropriate turning tool, such as e.g. a wrench or the like, through the opening 13 in the inner region 15, the anchor head nut 14 is tightened on the anchor 3 or its anchor thread 23, so that it is pressed firmly with the anchor plate 25 against the geological formation 2 or here the structure 11. If this state is reached, the armature tensioning device 1 can be removed from the armature 3 by loosening the armature fixation 7, so that the armature tensioning device 1 can be used to preload the next armature 3. Checking the preload with the invention
    Armature tensioning device 1 is carried out analogously. For this purpose, the armature tensioning device 1 is mounted on the armature 3 in the operating position shown in FIG. 1. Then the clamping element 5 is rotated on the clamping thread 8 until the
    Anchor head nut 14 is easily lifted off the anchor plate 25. This then indicates the currently existing pre-tensioning of the armature 3, which, if necessary, can be adjusted and re-adjusted accordingly if necessary by further turning the tensioning element 5 on the tensioning thread 8.
    As already explained, the measuring device 19 serves to display the pretension currently applied to the armature 3 in its longitudinal direction 4. Now several, e.g. adjacent anchors can be pre-stressed or their pre-tension checked, so when using a turning tool, e.g. indicates a torque, the force measuring device 19 are used in the bias of an armature. If the operator of the turning tool then remembers the torque at which the desired pretension is achieved, the pretensioning of the others, e.g. adjacent anchors may optionally be dispensed with the force measuring device 19 if the / 28
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    Torque display of the turning tool is then used accordingly as a measuring device for the current tension on the armature 3. A corresponding exemplary embodiment is shown in FIG. 2. Except for the omission of the measuring device 19, this exemplary embodiment corresponds to that described above
    Embodiment according to FIGS. 1 and 3.
    While the longitudinal direction 4 of the armature 3 in the first two exemplary embodiments according to FIGS. 1 to 3 is normally arranged on an outer surface or surface 18 of the structure 11 or the geological formation 2, in practice there are often cases in which this is not the case. Such an example is shown in FIG. 4. There, the angle 17 between the longitudinal direction 4 of the anchor 3 fixed in the geological formation 2 and the surface 18 surrounding the anchor 3 of the structure 11 fixed to the geological formation 2 is not an orthogonal but an angle deviating from 90 °. In order to be able to use armature tensioning devices 1 according to the invention for tensioning or for checking the tension of the armature 3 in its longitudinal direction 4 here too, an angle compensation device 16 can be used in such a situation as is shown by way of example in FIG. 4. 4 in the form of a wedge-shaped tube section. In the exemplary embodiment shown, this wedge-shaped tube section is arranged between the support device 10 and the anchor plate 25 resting on the structure 11 or the geological formation 2. This then enables the armature tensioning device 1 according to the first exemplary embodiment according to FIGS. 1 and 3 to also be used for prestressing and / or for checking the prestressing of the
    Use anchor 3 if the angle 17 is not 90 °.
    5 and 6, a further embodiment of the invention is shown, which is a modified form of the first embodiment according to FIGS. 1 and 3. The difference to the first embodiment lies in
    Design of the support device 10. This is no longer tubular but designed as a multi-leg. In the minimal embodiment, this type of support device 10 has at least two legs 32/28 held in the base plate 35
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    00019/0032 ···· • · · on. In preferred embodiments, more than two, e.g. three or four legs 32 present. The tensioning element 5 of this exemplary embodiment is connected to this base plate 35 via the interposition of the components already mentioned for the first exemplary embodiment and thus via the legs 32 to the
    Structure 11 and thus supported on the geological formation 2. On the one hand, this simplifies the accessibility to the anchor head nut 14 as well as to the threaded support body 6 compared to the first exemplary embodiment, since the entire space between the legs 32 can be used as the opening 13 of the support device 10. Another advantage of this embodiment of the
    Support device 10 is shown by way of example in FIG. 6. If one forms the legs 32 e.g. by means of a corresponding thread or the like in such a way that their position can be adjusted relative to the base plate 35, the legs 32 can be positioned accordingly in the base plate 35
    Support device 10 are formed so that they adapt to the angle
    17 allowed between the longitudinal direction 4 and the surface 18. In these
    Embodiments, the angle compensation device 16 is thus also integrated into the support device 10. Except for the differences mentioned, the embodiment according to FIGS. 5 and 6 corresponds in structure and function to the embodiment according to FIGS. 1 and 3, so that with this
    Reference to the above explanations can be dispensed with additional explanations.
    7 and 9, a further exemplary embodiment of the invention is shown, in which the threaded carrier body 6 is designed differently than previously described. Fig. 7 again shows a schematic representation of the
    Operating position in which the armature tensioning device 1 is fastened on the armature 3 for tensioning it. FIG. 9 shows an associated exploded view of the individual parts of the armature tensioning device 1 according to FIG. 7. In this
    The threaded carrier body 6 is embodied in one piece as a sleeve 21. In the interior of the sleeve 21 there is the anchor fixation 7 for fixing the threaded support body 6 on the anchor 3. In the exemplary embodiment shown, this anchor fixation 7 is in the form of / 28 as an anchor-side thread 9
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    Hofmann & Fechner @ 0020/0032 • · * * · «· · · * • · · · · ·» · * # * · · «· ft * ft * ft» ·· »ft • * · · * ··· An internal thread is formed in the sleeve 21. In contrast to the previously described exemplary embodiments, the clamping thread 8 in this exemplary embodiment is also directly on the sleeve 21 of the thread carrier body 6 is formed as an external thread. The threaded rod 22 of the exemplary embodiments described above can thus be dispensed with in such embodiments. In this exemplary embodiment, the clamping element 5, which in turn can also be designed as a clamping nut, engages in the clamping thread 8, which here is formed directly on the threaded carrier body 6 in the form of the sleeve 21. The tensioning element 5 of this exemplary embodiment according to FIGS. 7 and 9 is supported via the adapter sleeve 29, the retaining ring 28, the axial bearing 12, the compensating plate 27 assigned to the axial bearing 12, the tubular support device 10 here in turn and the anchor plate 25 on the geological one Formation 2 or the pre-designed structure 11. The function and structure i
    these parts essentially correspond to the first exemplary embodiment, so that further explanations for this can be omitted. In contrast to the previously described exemplary embodiments, the threaded carrier body 6 of this exemplary embodiment is supported to the rear with the interposition of the
    Force measuring device 19 on a lock nut 33 screwed directly onto the anchor thread 23. The tensile stress in the longitudinal direction 4 of the armature 3 is thus introduced into the armature 3 via the threaded support body 6 with the interposition of the force measuring device 19 and via the lock nut 33.
    The processes of prestressing the armature 3 or checking the prestressing of the armature 3 are again carried out by turning the
    Clamping element 5 relative to the clamping thread 8. This is self-explanatory taking into account the explanations for the first exemplary embodiment and need not be explained further.
    FIG. 8 shows a modification of the exemplary embodiment according to FIGS. 7 and 9 30 in that the measuring device 19 is dispensed with here. As explained above, this is possible if you have a corresponding torque wrench or the like for tightening the clamping element 5/28
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    Hofmann & Fechner @ 0021/0032 ·· · · · ·· ···· ·· ····· · · · «• ·· ········· · · · · · ···· · · · ···· · · · · · ·· ·· · ·· ··· ···· used and the torque applied by him as a measure of the preload acting on the armature 3 in the longitudinal direction 4.
    While in the exemplary embodiments of the invention explained so far, the threaded carrier bodies 6 always have anchor fixings 7 and clamping threads 8 connected to one another in a rotationally fixed manner, a further exemplary embodiment of an anchor tensioning device 1 according to the invention is shown schematically in FIG. 10, in which this is not the case. In the variant shown in FIG. 10, in which a support device 10 is used as in the exemplary embodiment according to FIGS. 5 and 6, the threaded carrier body 6 is formed in two parts. On the one hand, it comprises the anchor fixation 7 for fastening the threaded support body 6 on the anchor 3. On the other hand, the threaded support body 6 also includes a threaded rod 22 which is rotatably mounted about a rotation axis coaxial to the longitudinal direction 4 via the pivot bearing 34 relative to the anchor fixation 7. In the clamping thread 8 of this threaded rod 22 of the threaded support body 6, a clamping nut 5, which is fixed in a rotationally fixed manner on the base plate 35 or a thread formed directly in the base plate 35 of the support device 10, engages as the clamping element 5. The threaded rod 22 has a tool adapter 20 at its end pointing away from the anchor fixation 7, e.g. in the form of a polygon or the like, on which a, preferably manually operable, turning tool can be attached. During a clamping process, the threaded rod 22 and thus the clamping thread 8 are rotated by means of the corresponding turning tool in this exemplary embodiment, while the anchor fixation 7 and also that
    Clamping element 5 remains stationary, i.e. it cannot be rotated. As a result, the preload in the longitudinal direction 4 of the armature 3 can also be increased and reduced. The pivot bearing 34 allows a relative rotation of the threaded rod 22 relative to the anchor fixation 7. The anchor fixation 7 can e.g. executed in the form of two half-shells, which by means of
    Fixing screws 26 can be clamped on the armature 3. Of course, as in the other exemplary embodiments, the anchor fixation 7 could also be designed as an anchor-side thread 9 in the sleeve 21, which is optionally screwed onto the anchor thread 23 by means of a fastening screw 26 and / 28
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    Legend for the reference numbers:
    1 Anchor tensioning device 19 measuring device 2 geological formation 20 tool adapter 3 anchor 21 sleeve 4 longitudinal direction 22 threaded rod 5 clamping element 23 anchor thread 6 Threaded support body 24 well 7 anchor fixation 25 anchor plate 8th clamping thread 26 mounting screws 9 anchor-side thread 27 compensating plate 10 support device 28 bracket 11 construction 29 fitting sleeve 12 thrust 30 washer 13 opening 31 socket 14 Anchor head nut 32 leg 15 interior 33 locknut 16 Angle compensating device 34 pivot bearing 17 angle 35 baseplate 18 area
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    patent attorneys
    Hofmann & Fechner • ·· ······ · • · · · · · · ·· ·· · ·· · «
    Dr. Ralf Hofmann Dr. Thomas Fechner Hörnlingerstr. 3, Postfach 5 6830 Rankweil, Austria ’’ ’’ T + 43 (0) 5522 73 137
    F +43 (0) 5522 73137-10 M office@vpat.at I www.vpat.at
    27431 34 / ss 20160614
    权利要求:
    Claims (10)
    [1]
    1. Anchor tensioning device (1) for prestressing and / or for checking the prestressing of an anchor (3) fixed in a geological formation (2) in a longitudinal direction (4) of the anchor (3), characterized in that the anchor tensioning device (1) at least one clamping element (5), preferably one
    5 clamping nut, and at least one threaded support body (6) with a
    Anchor fixation (7), for fastening the thread carrier body (6) to the anchor (3), and has at least one tension thread (8), the tension element (5) engaging in the tension thread (8) and the tension element (5) and the tension thread ( 8) for preloading and / or for checking the
    10 bias of the armature (3) are rotatable relative to each other.
    [2]
    2. Anchor tensioning device (1) according to claim 1, characterized in that the anchor fixation (7) has or is an anchor-side thread (9) for screwing the threaded support body (6) onto the anchor (3), wherein
    15 is preferably provided that the clamping thread (8) has a smaller one
    Thread pitch as the anchor-side thread (9).
    [3]
    3. anchor tensioning device (1) according to claim 1 or 2, characterized in that the anchor fixation (7) and the clamping thread (8) rotatably with each other
    20 are connected.
    [4]
    4. Anchor tensioning device (1) according to one of claims 1 to 3, characterized in that the anchor tensioning device (1) at least one support device (10) for supporting the tensioning element (5) or
    25 threaded carrier body (6) on the geological formation (2) or on the geological formation (2) supported and / or fixed structure (11).
    20/28
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    00025/0032 • · • · · • ···
    [5]
    5. armature tensioning device (1) according to claim 4, characterized in that the armature tensioning device (1) at least one axial bearing (12) for reducing the frictional forces between the tensioning element (5) or
    Thread carrier body (6) on the one hand and the support device (10) on the other hand when rotating the clamping element (5) and the clamping thread (8) relative to each other.
    [6]
    6. Anchor tensioning device (1) according to claim 4 or 5, characterized in that the support device (10) has at least one opening (13) which has access to an anchor head nut (14) screwed onto the anchor (3) in an inner region (15 ) of the support device (10).
    [7]
    7. Anchor tensioning device (1) according to one of claims 1 to 6, characterized in that the anchor tensioning device (1) an angle compensation device (16) for adapting the support device (10) to an angle (17) between the longitudinal direction (4) of the in geological formation (2) fixed anchor (3) and a surface (18) surrounding the anchor (3) of the geological formation (2) or on the geological formation (2) supported and / or fixed structure (11).
    [8]
    8. Anchor tensioning device (1) according to one of claims 1 to 7, characterized in that the anchor tensioning device (1) at least one measuring device (19) for measuring the pretension in the longitudinal direction (4) of the armature (3) between the tensioning element (5) and the geological formation (2), preferably between the tensioning element (5) and the support device (10).
    [9]
    9. anchor tensioning device (1) according to any one of claims 1 to 8, characterized in that the clamping element (5) or the threaded support body (6) has a tool adapter (20) for attaching one, preferably by hand
    21/28
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    [10]
    10. Anchor tensioning device (1) according to one of claims 1 to 9, characterized 5 in that the threaded support body (6) is or has a sleeve (21), wherein the clamping thread (8) has an external thread on the sleeve (21) or on one with the sleeve (21) connected threaded rod (22) of the threaded support body (6) and / or the anchor-side thread (9) is an internal thread of the sleeve (21).
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    同族专利:
    公开号 | 公开日
    AT518948B1|2019-10-15|
    WO2018018054A1|2018-02-01|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    EP0427664A2|1989-11-10|1991-05-15|HILTI Aktiengesellschaft|Device for placing dowels|
    CN103266607A|2013-04-25|2013-08-28|中天建设集团有限公司|Anchor head waist beam structure|
    GB8722582D0|1987-09-25|1987-11-04|Perard Torque Tension Ltd|Chuck|
    WO2011020144A1|2009-08-19|2011-02-24|Peter Gray|Rock bolt anchor and nut|
    US20150308269A1|2013-05-16|2015-10-29|MatLok, Inc.|Mine roof bolt system|CN110486068B|2019-08-09|2020-11-27|中铁十一局集团第四工程有限公司|Tunnel advanced support type foot locking anchor rod structure and construction method thereof|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    ATA349/2016A|AT518948B1|2016-07-27|2016-07-27|Anchor tensioning device|ATA349/2016A| AT518948B1|2016-07-27|2016-07-27|Anchor tensioning device|
    PCT/AT2017/000051| WO2018018054A1|2016-07-27|2017-06-26|Anchor-loading device|
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