EP4499951A1 - Spannschloss zum verspannen von rahmenschalungselementen - Google Patents
Spannschloss zum verspannen von rahmenschalungselementenInfo
- Publication number
- EP4499951A1 EP4499951A1 EP23715434.9A EP23715434A EP4499951A1 EP 4499951 A1 EP4499951 A1 EP 4499951A1 EP 23715434 A EP23715434 A EP 23715434A EP 4499951 A1 EP4499951 A1 EP 4499951A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- wedge
- crossbar
- clamping
- section
- rail
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- 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
- E04G17/00—Connecting or other auxiliary members for forms, falsework structures, or shutterings
- E04G17/04—Connecting or fastening means for metallic forming or stiffening elements, e.g. for connecting metallic elements to non-metallic elements
- E04G17/045—Connecting or fastening means for metallic forming or stiffening elements, e.g. for connecting metallic elements to non-metallic elements being tensioned by wedge-shaped elements
-
- 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
- E04G17/00—Connecting or other auxiliary members for forms, falsework structures, or shutterings
- E04G17/02—Connecting or fastening means for non-metallic forming or stiffening elements
Definitions
- the invention relates to a turnbuckle for bracing frame formwork elements according to the preamble of claim 1.
- a generic turnbuckle is known from WO 2005/007997 A1.
- Frame formwork elements are used to create boundaries for bodies to be cast, especially concrete bodies, such as building parts.
- several frame formwork elements usually have to be firmly connected or clamped together.
- turnbuckles also known as directional locks or formwork locks, are used.
- turnbuckles are used to connect adjacent frame formwork elements flush, aligned and tight.
- Turnbuckles are used in particular to connect or clamp two adjacent frame formwork elements together, whereby inner corners, outside corners, joint corners and end formwork can also be connected with the help of the turnbuckles.
- the turnbuckles can also be used to connect a frame formwork element to an adjacent compensation element.
- Compensating elements are used to achieve length compensation and are typically arranged between two conventional frame formwork elements.
- the compensation elements are usually made of wood, steel or aluminum.
- Conventional frame formwork elements have a circumferential frame with at least two vertically extending frame elements and two horizontal frame elements as well as horizontally extending struts to stabilize the frame.
- the braces generally run horizontally between the two vertical frame members of the frame.
- vertical struts can also be provided to additionally stabilize the frame.
- Compensating elements can have a different structure, but as a rule a surrounding frame is also provided.
- a formlining is or can be secured to the frame in a known manner.
- Compensating elements also represent frame formwork elements within the scope of the present invention.
- Turnbuckles are usually arranged in the area of intersections of horizontal struts and vertical frame elements of the frame.
- Each clamping jaw of the turnbuckle encompasses a section of a vertically extending frame element of two frame formwork elements to be connected. Using a wedge, the two clamping jaws and thus the frame formwork elements are then clamped against each other, i.e. H. the clamping jaws move towards each other.
- the turnbuckle usually has a traverse and a first clamping jaw, which is typically immovably connected to the traverse. Furthermore, the turnbuckle has a second clamping jaw, the second clamping jaw being displaceable in a clamping direction along the longitudinal axis of the traverse in the direction of the first clamping jaw in order to clamp the frame formwork elements.
- the clamping jaws preferably each have two claws, with the two claws of a clamping jaw being spaced apart such that a horizontal strut can be accommodated between the two claws.
- Such clamping jaws are also referred to as claws.
- the direction of translation of the wedge when driving into the turnbuckle during tensioning (hereinafter also referred to as the wedge impact direction) or when releasing the wedge and the tensioning direction, i.e. H. the movement of the second clamping device along the traverse, have a right angle to one another. If two horizontally adjacent frame formwork elements are connected in the usual way with such a turnbuckle, i.e. H. braced horizontally, gravity acts fully on the wedge in such a way that it is pulled in the direction of greater tension. This has proven to be beneficial.
- turnbuckles In order to create interfaces between two adjacent frame formwork elements that experience particularly large forces, e.g. B. in joint corners or outer corners, several turnbuckles are used adjacently. The turnbuckles are then typically on a straight line, e.g. B. among themselves, d. H. vertically offset from each other, arranged with parallel clamping movements of the clamping jaws.
- turnbuckles should be suitable for connecting frame formwork elements whose frames have different strengths, for example depending on whether external corners, hinged corners or the like are to be connected.
- the turnbuckle has a quick adjustment, so that the distance between the two clamping jaws of the turnbuckle can be quickly and easily adjusted to the desired dimension, the turnbuckle can be attached and the frame formwork elements can then be clamped.
- the turnbuckles should therefore have a suitable span that can be adjusted quickly.
- high forces can be applied at short notice so that the turnbuckle, when attached to two frame formwork elements, can reliably fix or brace them.
- the aforementioned turnbuckles which are clamped with a combination of hammer and wedge, have proven to be suitable for this.
- Turnbuckles are also known from the prior art and can be operated without striking aids. A length adjustment via a spindle is known, but this does not allow quick adjustment.
- turnbuckles have become established in which the two clamping jaws, as described above, can be moved towards one another and clamped together by means of a wedge that is driven in by a striking tool.
- Such turnbuckles have become established because, on the one hand, these turnbuckles ensure a flush, aligned and tight connection between frame formwork elements, and on the other hand, such turnbuckles enable quick adjustment in order to adjust the turnbuckles to different spans between the frames of the frame formwork elements to be connected.
- Such a turnbuckle is disclosed in the generic document.
- the generic document describes that the direction in which the wedge is driven into the turnbuckle and the tensioning direction include an angle a ⁇ 90° in order to improve the operation of the wedge.
- the present invention is based on the object of improving the previously known state of the art, in particular of providing a turnbuckle for bracing frame formwork elements, which can be released quickly and easily even in installation situations that are difficult to access.
- the turnbuckle according to the invention for clamping frame formwork elements has a first clamping device, having a cross member and a first clamping jaw.
- the traverse has a toothed section with a series of track teeth arranged one behind the other and running parallel to one another.
- a second clamping device having a second clamping jaw and a guide device, is provided.
- the second clamping device can be displaced in a clamping direction along the traverse in the direction of the first clamping jaw.
- the turnbuckle further has a wedge which, guided by the guide device, can be displaced along a wedge turning direction and brought into engagement with at least one of the track teeth in order to fix the two clamping devices in a clamping position.
- the guide devices have a cross bar that can be moved transversely to the wedge impact direction between an unlocking position and a locking position.
- the crossbar is designed and arranged in such a way that the crossbar in the locking position limits a stroke of the wedge in a direction orthogonal to the toothed section in such a way that the wedge can be brought into engagement with the at least one track tooth in the clamping position, and wherein the crossbar is in The unlocking position allows a greater stroke of the wedge.
- the turnbuckle according to the invention has a crossbar, through whose movement between an unlocking position and a locking position a stroke can be influenced, which the wedge can carry out in a direction orthogonal to the toothed section, the turnbuckle according to the invention can be clamped when two frame formwork elements are clamped together , ie is in the clamping position, can be released in a simple manner, even if the turnbuckle is mounted in a forced position in which the wedge cannot be released again by hitting it with a hammer against the direction of the wedge impact.
- Such a predicament can occur, for example, in frame formwork elements in which the turnbuckle is fixed to a lower horizontal strut or when several turnbuckles are mounted one above the other at a short distance on a straight line.
- a predicament in which the wedge cannot be released again by hammer blows against the direction of wedge impact or cannot easily be released again by hammer blows against the direction of wedge impact can arise in particular with frame formwork elements that form foundation formwork, or with frame formwork elements that only have a small have vertical height, for example in frame formwork elements that are used to build foundations, e.g. B. train routes can be used.
- the turnbuckle according to the invention is particularly suitable for frame formwork elements that are used to produce wall formwork.
- the solution according to the invention makes it possible that the wedge does not have to be actuated in order to release the turnbuckle from the clamping position. It can be easily released using the crossbar. As a result, the wedge can fall out of the clamping position or be removed without any effort being necessary.
- the operation of the turnbuckle according to the invention in particular the operation of the crossbar, in order to release the two clamping devices when they are fixed in a clamping position relative to one another, is simple and quick.
- An additional tool to operate the crossbar is not necessary. Manual operation or, if necessary, operation using the existing tool, in particular a hammer, is sufficient to move the crossbar, in particular to move it from a locking position to an unlocking position.
- the crossbar is first moved into the locking position in such a way that the crossbar limits a stroke of the wedge in a direction orthogonal to the toothed section in such a way that the wedge is in the clamping position with the at least one, can preferably be brought into engagement with two track teeth.
- the wedge can be hammered into the toothed section in a known manner, preferably using a hammer.
- the wedge is moved in the direction of wedge impact.
- the turnbuckle can be operated in a known manner, in particular in order to use the wedge to fix the two clamping devices or the two clamping jaws in a clamping position relative to one another.
- the clamping device can also be released from the clamping position according to the invention by moving the crossbar from its locking position, in which it limits the stroke of the wedge in a direction orthogonal to the toothed section in such a way that the wedge is in the Bracing position is in engagement with at least one of the track teeth, can be moved into an unlocking position in which the crossbar enables a larger stroke of the wedge.
- the crossbar enables a larger stroke of the wedge in a direction orthogonal to the toothed section, i.e. H. that the wedge can move further away from the toothed section in an orthogonal direction, the toothed engagement between the wedge and the respective track teeth or teeth of the toothed section is at least loosened.
- the wedge can therefore be moved out of the toothed section without the need for hammer blows or greater effort.
- the stroke of the wedge in a direction orthogonal to the toothing engagement also takes place orthogonally to the longitudinal axis of the wedge or to the wedge impact direction. It is advantageous if the crossbar in the unlocking position enables a stroke of the wedge in such a way that engagement of the wedge in the track teeth in the clamping position is at least reduced.
- the crossbar at least reduces engagement of the wedge in the track teeth in the unlocking position. This can, for example, mean that the wedge can be released without the need for hammer blows.
- crossbar in the unlocking position increases the stroke of the wedge in such a way that the wedge can be brought out of engagement with the track teeth in the clamping position.
- a design of the crossbar such that in the unlocking position the stroke of the wedge is increased such that the wedge is out of engagement with the track teeth in the clamping position has proven to be particularly suitable. This allows the fixation of the clamping devices to be released, even if the wedge is not moved counter to the impact movement or in the opposite direction of the wedge impact direction.
- the turnbuckle according to the invention thus makes it possible to fix the turnbuckle in a position in which it clamps two frame formwork elements together in two different ways, on the one hand by moving the wedge axially against the direction of wedge impact by hammer blows and on the other hand by moving the wedge Crossbar is moved or moved from a locking position to an unlocking position.
- the crossbar interacts with the wedge in such a way that, depending on the position of the crossbar, the crossbar acts on the wedge in such a way that a stroke of the wedge is achieved mechanically, preferably through direct contact between the wedge and the crossbar or with the help of a Intermediate element or several intermediate elements, for example a wedge system rail described in more detail below, is mechanically limited.
- the wedge in the locking position limits a stroke of the wedge in such a way that the wedge cannot carry out a stroke when it is driven into the toothed section up to the clamping position, i.e. H. the stroke in the clamping position is zero.
- the stroke is then increased, i.e. H. a stroke is set that is greater than the stroke that the wedge can take when the crossbar is in the locking position.
- the stroke of the wedge which it can assume when the crossbar is in the unlocking position, corresponds to a value that is greater than 10% of the amount of the toothing depth of the track teeth.
- the toothing depth is understood to mean the distance between the tip of the spur teeth and the valley of the spur teeth or the head of a spur tooth and the foot of a spur tooth. More preferably, the stroke is at least 20%, even more preferred at least 30%, in particular at least 50%, of the toothing depth.
- the stroke is the same size, in particular larger, than the toothing depth, so that the toothing of the wedge, which is in engagement with at least one of the track teeth when the wedge is driven into the clamping position, can be brought completely out of engagement with the track teeth.
- the stroke that the wedge can assume when the crossbar is in the unlocking position is less than twice the toothing depth, preferably less than 150%, in particular less than 120% of the toothing depth.
- the stroke of the wedge is to be understood as meaning the movement of the wedge orthogonally to the toothed section in a direction away from the toothed section. If the stroke is zero, which is preferably the case when the wedge is turned into a clamping position such that the two clamping devices are fixed to one another, the wedge cannot be moved in a direction orthogonal to the toothed section.
- crossbar can be displaced parallel to the clamping direction between an unlocking position and a locking position.
- a displacement of the crossbar parallel to the bracing direction has proven to be particularly suitable for influencing a stroke by moving the crossbar that the wedge can perform in a direction orthogonal to the bracing section.
- the guide device has a housing part with at least two guide recesses which are arranged at a distance from one another in the wedge insertion direction and through which the wedge passes, the guide recesses guiding the wedge in the wedge insertion direction, and the crossbar being displaceable transversely to the wedge insertion direction is arranged on the housing part.
- the guide device has a housing part with at least two guide recesses through which the wedge is passed, the wedge can be moved in a particularly advantageous manner in the wedge insertion direction, in particular brought or driven into a clamping position, so that the wedge or the toothing of the Wedge is brought into engagement with one of the track teeth in such a way that the two clamping devices or the two clamping jaws are fixed to one another.
- the crossbar is arranged on the housing part so as to be displaceable transversely to the direction of wedge impact. Such an arrangement can be implemented in a particularly stable and reliable manner. This is particularly advantageous for robust use and with regard to the requirements on construction sites.
- the housing part and/or the cross bar have a U-shaped profile in cross section. It has proven to be advantageous if the housing part and the cross bar have an at least approximately U-shaped profile in cross section.
- crossbar is fixed on an inside of the housing part.
- the cross bar which is preferably U-shaped in cross section
- the housing part which is also preferably U-shaped in cross section
- the housing part and the cross bar are oriented identically, preferably in such a way that a longitudinal axis of the cross bar and a The longitudinal axis of the housing part runs transversely to the wedge impact direction.
- the longitudinal axes extend along the bottom of the respective U-shaped profile from a front end to a rear end of the crossbar or the housing part, so that the longitudinal axes on the floor run centrally between the side walls of the U-shaped profile.
- the housing part or the guide device are preferably formed in one piece with the second clamping device.
- the two side walls of the second clamping jaw are preferably connected in one piece to one side wall of the U-shaped profile of the housing part and extend in a direction facing away from the bottom of the U-shaped profile of the housing part.
- the second clamping jaw can also be connected to the guide device or the housing part in another way, in particular in a material or non-positive manner, for example welded or screwed.
- a wedge contact rail is arranged movably in the guide recesses in such a way that the wedge contact rail can carry out a lifting movement orthogonal to the toothed section, the wedge contact rail being arranged in the guide recesses on a side of the wedge facing away from the toothed section, such that a Underside of the wedge system rail adjoins an upper side of the wedge and wherein the crossbar is arranged on the housing part in such a way that the crossbar adjoins an upper side of the wedge system rail facing away from the wedge and the crossbar limits the stroke of the wedge system rail.
- wedge system rail has proven to be particularly suitable, on the one hand, to provide good guidance for the wedge, so that the wedge can be moved in the wedge impact direction, ie moved into the clamping position or returned from the clamping position by a countermovement can.
- the wedge contact rail itself is arranged in such a movable manner in the guide device that the wedge contact rail can carry out a lifting movement (orthogonal to the toothed section).
- the wedge contact rail is positioned in the guide recess in such a way that an underside of the wedge contact rail adjoins an upper side of the wedge.
- the crossbar adjoins an upper side of the wedge system rail facing away from the wedge, so that the crossbar limits the stroke of the wedge system rail and thus also the stroke of the wedge.
- a displacement of the crossbar by one The unlocking position into a locking position is therefore relative, in particular with contact, to the wedge contact rail, so that the wedge contact rail is moved closer to the toothed section in the locking position.
- the cross bar of the wedge rail provides an increased stroke so that the wedge rail can be moved away from the toothed section.
- the wedge system rail makes it possible for the two parts, which are each movable along their longitudinal axis, namely the wedge, which moves in the wedge insertion direction, and the crossbar, which is moved transversely to the wedge insertion direction, not to mechanically affect the other directly during their respective movements Part act, but the movement takes place opposite the wedge system rail, which thus acts as an intermediate layer or intermediate element.
- the wedge system rail is preferably designed in one piece, but can also be made in several pieces.
- the guide recesses have a shoulder against which the wedge rail rests when the crossbar is in the locking position.
- the underside of the wedge rail rests against the shoulders of the guide recess. This limits movement of the wedge contact rail in the direction of the toothed section, so that the wedge contact rail does not push the wedge too far into the track teeth or the toothed section.
- the crossbar has on its underside facing the wedge a control surface which extends at least over a partial length of the crossbar and which limits the stroke of the wedge in the guide recesses to different values depending on the position of the crossbar.
- the crossbar has a control surface that extends at least over a partial length of the crossbar.
- the control surface preferably runs along the longitudinal axis of the crossbar or parallel to the displacement movement of the crossbar in order to move it between the unlocking position and the locking position, i.e. H. transverse to the direction of wedge impact.
- control surface extends over at least 50% of the length of the crossbar, particularly preferably over at least 70%, in particular over at least 80% and particularly preferably over at least 90% of the length of the crossbar.
- the crossbar has a control surface on its underside, which limits the stroke of the wedge in the guide recesses to different values depending on the position of the crossbar, in particular in such a way that in the locking position, when the wedge is in a clamping position, there is no stroke is present, while in the unlocking position of the crossbar there is a stroke is present, through which the engagement of the wedge in the track teeth is reduced or released, the fixation between the two clamping devices can be released particularly easily or the crossbar can be brought particularly easily from an unlocking position to a locking position and vice versa.
- Control surfaces can be implemented on an underside of the crossbar using known measures in a suitable manner, in particular by choosing a suitable slope. It can be provided that the control surface acts directly on the wedge or via an intermediate element, in particular the wedge contact rail described above.
- the horizontal displacement of the crossbar can be designed in such a way that an area is made available in the locking position in order to compensate for tolerances and wear, for example of up to 10°. This can be achieved in particular by using a control surface that has a corresponding inclination.
- Crossbar has at least a first section which, when the crossbar is brought into contact with the top of the wedge system rail or the top of the wedge in the locking position, limits a stroke of the wedge in a direction orthogonal to the toothed section in such a way that the wedge engages with can be brought to the track teeth and wherein the control surface has a second section which, when the crossbar is brought into contact with the top of the wedge contact rail or the top of the wedge in the unlocked position, enables a larger stroke of the wedge.
- control surface with a first and a second section has proven to be particularly suitable.
- the sections in particular the first section, have a slope, i.e. H. that the distance between the first section of the control surface and the toothed section of the traverse changes over the course of the first section.
- the second section can also have a slope, but is preferably designed without a slope.
- the design of the control surface in the first section in such a way that a slope is provided makes it possible to address wear of the toothed section, the wedge, the wedge contact rail and/or the crossbar in such a way that the crossbar is moved further in the direction of the locking position when wear and tear has occurred over time.
- the locking position of the crossbar preferably provides that the wedge can be introduced into a clamping position in the toothed section in the wedge insertion direction in such a way that there is no longer any stroke in the clamping position. It is therefore advantageous if the first section of the control surface of the crossbar is designed such that the locking position within the first section can be selected in a suitable manner. According to the invention it can further be provided that the control surface has a transition section between the first section and the second section.
- a transition section is formed between the two sections of the control surface, which can be characterized in particular by the fact that it has a greater gradient than the first section. This makes it possible to make a transition between the unlocking position and the locking position over a comparatively short distance.
- the first section also has a slope, so that, despite tolerances and wear, the crossbar can be brought into a position in which the wedge is brought into engagement with at least one of the track teeth of the toothed section in such a way that there is no longer any stroke in the clamping position.
- the cross bar has, preferably as described, a U-shaped profile in cross section. It is preferably provided that the control surface is formed on the undersides or the free ends of the side walls of the U-shaped transverse part. The undersides of the side walls are identical.
- the crossbar is arranged on an inside of the housing part of the guide device.
- the crossbar is arranged on an inside of the housing part of the guide device, in particular if the housing part surrounds the crossbar in a U-shape.
- the crossbar has at least one, preferably several, in particular two, elongated holes, with the help of which the crossbar is displaceably arranged on the housing part, preferably screwed, and wherein the elongated holes limit a movement of the crossbar transversely to the wedge impact direction.
- the crossbar has one, in particular two, elongated holes, with the help of which and with the help of suitable screws or rivets, the crossbar is displaceably arranged on the housing part.
- the elongated holes can limit the movement of the crossbar transversely to the direction of wedge impact.
- the elongated holes thus extend transversely to the direction of wedge impact or run along the longitudinal axis of the crossbar.
- the crossbar can therefore also be mounted particularly advantageously and, if necessary, replaced.
- two elongated holes in conjunction with suitable fastening elements enable a defined and robust movement of the crossbar transversely to the wedge insertion direction, ie from the unlocking position to the locking position and vice versa.
- the wedge and/or the wedge contact rail are captively arranged in the guide recesses.
- the wedge can preferably have bends at both ends, which prevent the wedge from being completely pulled out of the guide recess.
- the bends are preferably selected such that an inner surface of the bend comes into contact with the housing part, in particular a housing part surrounding the guide recess, when the wedge is moved to the respective end position.
- the wedge system rail can be designed in the same way as the wedge.
- an additional component is welded to the wedge system rail, which extends plane-parallel to a surface of the guide recess or a side wall of the housing part and protrudes beyond the respective guide recess.
- the wedge is first inserted into the guide recesses, which, if the wedge contact rail is not yet inserted, provides sufficient space in a direction orthogonal to the toothed section to insert the wedge.
- the wedge rail is then inserted into the guide recesses.
- the wedge contact rail can preferably already have a projection at one end, so that in a direction of movement along the longitudinal axis of the wedge contact rail there is a positive connection with the housing part or an edge of the corresponding guide recess.
- a projection or an end stop can then be attached, preferably after the wedge rail has been inserted into the guide recesses, for example by riveting, welding or screwing.
- an end stop by forming, so that the wedge contact rail is received in a form-fitting manner in the two guide recesses, preferably with as little play as possible, relative to a movement along its longitudinal axis, or that movement of the wedge contact rail along its longitudinal axis is largely prevented.
- the wedge contact rail has a contact surface on the underside, which forms a linear guide with a contact surface formed on the top of the wedge in order to guide the wedge in the wedge insertion direction, the two stop surfaces preferably being designed to be complementary.
- the stop surfaces can preferably be designed to be complementary to one another, for example in such a way that one stop surface has grooves and the other stop surface has springs that engage with one another. Depressions and/or projections can also be provided on the stop surfaces, which are designed in such a way that a linear guide is formed.
- the contact surface for the wedge formed on the underside of the wedge contact rail has a recess, the recess preferably being a trapezoidal recess, a triangular recess, a recess with rounded edges, a circular recess, a rounded one Depression or is formed by grooves, and / or viewed in cross section, the depression has a flat bottom, from which side walls extend towards the wedge, which are at an angle of 30 ° to 60 °, preferably 45 °, to the floor run outwards.
- the trapezoidal depression is preferably designed in such a way that, starting from the bottom of the trapezoidal depression, side walls run in the direction of the wedge, which extend outwards at an angle of 30° to 60°, preferably 45° +/- 5°, to the floor run so that the trapezoidal depression, starting from the ground, opens towards the wedge.
- Such a shape has proven to be particularly suitable for guiding the wedge compared to a shape in which the side walls are at an angle of 90 ° to the bottom of the recess.
- the wedge is preferably designed in such a way that it has side walls which rest on the side walls of the trapezoidal recess, each viewed in cross section.
- the wedge Due to the depression, in particular the trapezoidal shape or the trapezoidal depression, in particular with a 45° angle, the wedge can rest optimally on the contact surface and complete load transfer is achieved.
- the contact surface formed on the top of the wedge has side walls which are complementary to the side walls of the contact surface of the wedge contact rail, the contact surface of the wedge preferably having oblique side walls which preferably correspond to the side walls of the recess in the wedge contact surface at an angle of 30° to 60°, particularly preferably at an angle of 45°.
- Such a design has proven to be particularly suitable for guiding the wedge in the preferably trapezoidal recess of the wedge system rail. This makes it possible to provide a good linear guide in the wedge insertion direction for driving in the wedge and for releasing it in the opposite direction. Furthermore, the forces that act in the lifting direction can also be absorbed in a particularly advantageous manner due to the inclined side walls.
- the contact surface of the wedge with which the wedge rests on the contact surface of the wedge contact rail, has two V-shaped projections, viewed in cross section, between which there is a V-shaped recess, the two V -shaped projections penetrate into the recess of the contact surface of the wedge system rail and one each Side wall of the V-shaped projection adjoins one of the side walls of the contact surface of the wedge system rail.
- the two V-shaped projections are identical when viewed in cross section.
- the V-shaped recess in the contact surface, viewed in cross section, is located centrally between the two V-shaped projections.
- the crossbar can be displaced between two end positions transversely to the wedge impact direction, with the crossbar assuming the locking position in the area of a first end position and the unlocking position in the area of a second end position.
- the locking position includes a locking area, in particular in order to be able to compensate for tolerances and wear.
- the locking position and the unlocking position are preferably located at the end or in the end region of the crossbar.
- the crossbar is preferably designed in such a way that it is captively accommodated in the housing part.
- a movement of the crossbar can be limited by the elongated holes preferably provided.
- the crossbar has bends or projections at its end regions, which are designed in such a way that the crossbar abuts the wedge and/or the wedge system rail with the projections or bends in the end positions.
- the bends or projections thus serve as end stops.
- These end stops preferably strike the wedge rail.
- the end stops limit the movement of the crossbar before the fastening means, in particular the screws, strike the ends of the respective elongated holes. This relieves the load on the screws or the elongated holes.
- Figure 1 shows an arrangement of frame formwork elements, the frame formwork elements being clamped together by several turnbuckles according to the invention
- Figure 2 is a perspective view of a turnbuckle according to the invention
- Figure 3 shows a side view of a turnbuckle according to the invention
- Figure 4 shows a further perspective view of a turnbuckle according to the invention
- Figure 5 shows a further perspective view of a turnbuckle according to the invention
- Figure 6 is a perspective view from the front of a turnbuckle according to the invention.
- Figure 7 is a view from the front of a turnbuckle according to the invention.
- Figure 8 shows a longitudinal section through a turnbuckle according to the invention, with a crossbar in a locking position and the wedge in the clamping position, so that the wedge engages in track teeth of a toothing section;
- Figure 9 shows a further longitudinal section through a turnbuckle according to the invention, with a crossbar being in an unlocking position, so that the wedge is out of engagement with the track teeth;
- Figure 10 is a perspective view of the longitudinal section according to Figure 9;
- Figure 11 is an exploded view of a turnbuckle according to the invention.
- Figure 12 is a view from above of a turnbuckle according to the invention in a representation showing a horizontal section through a crossbar;
- Figure 13 is a representation according to Figure 12, with the horizontal section running below an upper side of the crossbar;
- Figure 14 shows a longitudinal section through a second clamping device of a turnbuckle according to the invention
- Figure 15 shows an enlarged sectional view of the wedge in the clamping position and the crossbar in the locking position, with a wedge contact rail being positioned between the wedge and the crossbar;
- Figure 16 is a perspective view of a wedge rail.
- Figure 1 shows six turnbuckles 1 according to the invention, which connect frame formwork elements 2 to one another. Only a section of the frame formwork element 2 shown in the image plane on the right is shown. For bracing the middle frame formwork element 2 with the two outer frame formwork elements 2, three turnbuckles 1 are provided, for example.
- the turnbuckles 1 according to the invention are fundamentally suitable for connecting or bracing two adjacent frame formwork elements 2 with each other, whereby in particular inner corners, outside corners, joint corners and end formwork can be connected using the turnbuckles 1 according to the invention.
- the turnbuckles 1 according to the invention are also suitable for connecting a frame formwork element 2 to an adjacent compensating element.
- Such compensating elements also represent frame formwork elements within the scope of the present invention.
- the frame formwork elements 2 to be connected can preferably be made of wood, plastic, steel or aluminum.
- the turnbuckles 1 according to the invention can be used to connect adjacent frame formwork elements 2 to one another flush, aligned and tight.
- the turnbuckles 1 serve in particular to connect two frame formwork elements 2 positioned next to one another, which run in a common plane, as shown in Figure 1.
- the frame formwork elements 2 shown in the exemplary embodiment each have two outer horizontally extending frame elements 3 (in Figure 1 only the lower outer frame elements 3 are shown, but not the upper outer frame elements) and two outer vertically extending frame elements 4, which together form a frame of the frame formwork element 2 form.
- Horizontal struts 5 are also provided.
- the turnbuckles 1 according to the invention are usually arranged in the area of intersections of the horizontally extending struts 5 and the vertically extending frame elements 4 of the frame formwork elements 2, as shown by way of example in FIG.
- the frame formwork elements 2 have a formwork skin in a manner not described in detail or can be connected to a formwork skin which faces the material to be filled and hardened.
- the frame formwork elements 2 are preferably frame formwork elements for producing bodies to be cast, in particular concrete bodies, in particular building parts. Such frame formwork elements 2 are well known from the prior art, which is why they will not be discussed in more detail below.
- frame formwork elements 2 for wall formwork are shown.
- the present invention is particularly suitable for frame formwork elements 2, which are used for foundation formwork.
- the frame formwork elements 2 abut one another in a known manner with an interface.
- the interface is shown in Figure 1 as a boundary line 6 between the middle frame formwork element 2 and the right frame formwork element 2 or the middle frame formwork element 2 and the left frame formwork element 2.
- the boundary line 6 is spanned by three turnbuckles 1, although fewer or more turnbuckles 1 can also be provided.
- the turnbuckles 1 each also span a vertically extending frame element 4 of the frame formwork elements 2 to be connected to one another. Furthermore, the turnbuckles 1 are preferably arranged on the horizontally extending struts 5 of the frame formwork elements 2, in particular in the way shown in Figure 1.
- the turnbuckles 1 shown in FIGS. 2 to 13 show a preferred design so that the turnbuckles 1 can grip around the horizontally extending struts 5.
- the turnbuckles 1 shown have a first clamping device 7 and a second clamping device 8.
- the first clamping device 7 has a cross member 9, which is preferably formed in one piece with a first clamping jaw 10.
- the first clamping jaw 10 is rigidly or firmly or immovably connected to the traverse 9.
- the traverse 9 has a preferably flat or flat top 11 with a toothed section 12.
- the toothing section 12 has a plurality of track teeth 13 arranged one behind the other and running parallel to one another.
- the second clamping device 8 can be displaced in a clamping direction (arrow direction A in FIGS. 2 and 12) along the cross member 9 in the direction of the first clamping jaw 10 (and in the opposite direction).
- the second clamping device 8 can be clamped without any significant effort can be moved quickly and easily along the traverse 9 in order to adjust the turnbuckle 1 to the two frame formwork elements 2 to be connected to one another. This is also known as quick adjustment.
- the traverse 9 is preferably a tubular element, preferably with a substantially rectangular, in particular square, cross-section.
- the top 11 and the toothed section 12 with the track teeth 13 are preferably formed in one piece with the cross member 9 in the exemplary embodiment.
- the second clamping device 8 of the turnbuckle 1 has a second clamping jaw 14.
- the first clamping jaw 10 and, analogously, the second clamping jaw 14 each have two claws 10a and 14a, respectively.
- the distance between the claws 10a and 14a is preferably selected such that a horizontally extending strut 5 can be accommodated between the claws 10a or the claws 14a.
- the second clamping jaw 14 or the second clamping device 8 can be displaced in the clamping direction along the longitudinal axis of the traverse 9 in the direction of the first clamping jaw 10 (and in the opposite direction).
- the second clamping device 8 is captively connected to the traverse 9 of the first clamping device 7 or is arranged captively on the traverse 9.
- a movement of the second clamping device 8 in and/or against the clamping direction is limited by formations 15 and/or limit stops 18.
- the formations 15 and/or the limiting stops 18 are preferably arranged in such a way that the second clamping device 8 cannot be removed from the cross member 9 in and/or against the clamping direction.
- the traverse 9 has formations 15 at its two axial ends 9a, 9b. These can preferably be manifestations (as shown).
- the formations 15 can also be used by any stop elements, e.g. B. pins, bolts or edges.
- the formations 15 can interact with correspondingly complementary elements on the second clamping device 8 in such a way that the second clamping device 8 cannot be pulled off the cross member 9 in and/or against the clamping direction.
- the formations 15 cooperate with limit stops 18 which are formed on the second clamping device 8, preferably by pins or bolts.
- a captive device is shown using formations 15 and limit stops 18, which form a captive device in a form-fitting manner in and against the clamping direction.
- one of the limit stops 18 interacts with one of the formations 15.
- one, particularly preferably two, formations 15 are provided at a first axial end 9a of the traverse 9, which cooperate with one, preferably two, limit stops 18 of the second clamping device 8.
- one, particularly preferably two, formations 15 are provided at the second end 9b of the traverse 9, which cooperate with one, preferably two, limit stops 18 of the second clamping device 8.
- the formations 15 and the limit stops 18 only limit a movement counter to the clamping direction.
- Protection against loss in the clamping direction can also result from the first clamping jaw 10 and the second clamping jaw 14 colliding with one another, that is, standing in the way in the clamping direction when the second clamping device 8 is displaced to an end point in the clamping direction A.
- the traverse 9 and the second clamping device 8 in the exemplary embodiment preferably form a running rail or a rail guide, which is designed in such a way that the second clamping device 8 is guided can be moved along the longitudinal axis of the traverse 9 in the bracing direction and against the bracing direction.
- the top 11 of the traverse 9, in particular the longitudinal edges of the top 11, which for this purpose preferably protrude over a first or a second longitudinal side 16, 17 of the traverse 9, can represent parts of the rail guide.
- the inside of the second clamping device 8 facing the longitudinal edges of the top 11 can be designed in a correspondingly complementary manner to form the rail guide.
- the limit stops 18 reach under the longitudinal edges of the traverse 9.
- the limit stops 18 thus represent part of the rail guide.
- the limit stops 18 also prevent the second clamping device 8 from being lifted off the traverse 9.
- a specific design of the inside of the second clamping device 8, so that it is designed to be complementary to the longitudinal edges of the top 11 of the traverse 9, is therefore not necessary in the exemplary embodiment or is implemented by the limit stops 18.
- the second clamping device 8 has a guide device 19.
- the turnbuckle 1 has a wedge 20, which, guided by the guide device 19, can be displaced along a wedge turning direction and brought into engagement with at least one of the track teeth 13 of the toothed section 12 in order to fix the two clamping devices 7, 8 in a clamping position relative to one another.
- the wedge impact direction is designated by arrow B in Figure 2 and Figure 12.
- the wedge 20 engages in two track teeth 13 of the toothed section 12 in the clamping position.
- the wedge impact direction runs orthogonally to the clamping direction.
- the wedge impact direction and the bracing direction preferably run in a plane that is plane-parallel to the top 11 of the traverse 9.
- the guide device 19 has a cross bar 21 which can be moved transversely to the wedge impact direction between an unlocking position (seen in FIGS. 9 and 10) and a locking position (seen in FIG. 8).
- the crossbar 21 is designed and arranged in such a way that the crossbar 21 in the locking position limits a stroke of the wedge 20 in a direction orthogonal to the toothed section 12 in such a way that the wedge 20 can be brought into engagement with the at least one track tooth 13 in the clamping position. This is shown, among other things, in FIG. 8 and enlarged in FIG. 15. In the exemplary embodiment, the wedge 20 is in engagement with two track teeth 13, as shown in FIG.
- the crossbar 21 is designed in such a way that the crossbar 21 enables a larger stroke of the wedge 20 in the unlocking position.
- the crossbar 21 enables a stroke of the wedge 20 in the unlocking position in such a way that engagement of the wedge 20 in the track teeth 13 in the clamping position can at least be reduced.
- the crossbar 21 increases the stroke of the wedge 20 in such a way that the wedge 20 can be brought out of engagement with the track teeth 13 in the clamping position.
- the exemplary embodiments show that the wedge 20 has teeth on its underside.
- two projecting teeth 20a are preferably provided, each of which preferably extends over at least 50% of the length of the wedge 20, preferably over at least 80% of the length of the wedge 20.
- the teeth 20a or the groove 20b of the wedge 20 are designed in such a way that tooth flanks of the teeth 20a rest on tooth flanks of the track teeth 13 when the wedge 20 is driven into the clamping position.
- FIG. 15 For this purpose, reference is made to the illustration according to FIG. 15.
- the crossbar 21 in the unlocking position increases the stroke of the wedge 20 in such a way that the wedge 20 can be brought out of engagement with the track teeth 13 without the wedge 20 having to be moved counter to the wedge turning direction.
- the wedge 20 can thus be raised orthogonally to the toothed section to such an extent that the teeth 20a on the underside of the wedge 20 and the track teeth 13 are no longer in engagement with one another, that is to say that their tooth flanks no longer touch each other.
- the two clamping devices 7 and 8 can thus be moved counter to the clamping direction and the turnbuckle 1 can thus be removed from the frame formwork elements 2 without the wedge 20 having to be moved for this purpose.
- the wedge 20 can be moved against the wedge direction without any great effort, if necessary also by hand to pull the wedge 20 back again.
- the guide device 19 preferably has a housing part 22 with at least two guide recesses 23.
- the guide recesses 23 are arranged at a distance from one another in the wedge impact direction.
- the guide recesses 23 represent windows in side surfaces of the housing part 22, the side surfaces preferably running plane-parallel to one another.
- the wedge 20 is carried out through the guide recesses 23.
- the guide recesses 23 guide the wedge 20 in the wedge impact direction.
- the cross bar 21 is arranged on the housing part 22 so as to be displaceable transversely to the wedge impact direction.
- a wedge contact rail 24 is movably arranged in the guide recesses 23 in such a way that the wedge contact rail 24 can carry out a lifting movement orthogonal to the toothed section 12.
- the wedge contact rail 24 is arranged in the guide recesses 23 on a side of the wedge 20 facing away from the toothed section 12 in such a way that an underside of the wedge contact rail 24 adjoins an upper side of the wedge 20.
- the crossbar 21 is arranged on the housing part 22 in such a way that the crossbar 21 adjoins an upper side of the wedge system rail 24 facing away from the wedge 20 and the crossbar 21 controls the stroke of the Wedge system rail 24 limited.
- the wedge system rail 24 is therefore located between the crossbar 21 and the wedge 20.
- FIG. 1 A perspective view of an advantageous embodiment of the wedge rail 24 is shown in Figure 17.
- the wedge system rail 24 simplifies both the guidance or driving of the wedge 20 in the wedge impact direction, so that the wedge 20 can be brought into the clamping position, as well as a movement of the crossbar 21 between the unlocking position and the locking position.
- the cross bar 21 is preferably arranged on an underside of the housing part 22 of the guide device 19.
- the crossbar 21 can thus be supported on the underside of the housing part 22.
- the crossbar 21 preferably has at least one, in the exemplary embodiment two, elongated holes 26, with the help of which the crossbar 21 is displaceably arranged on the housing part 22.
- the crossbar 21 is screwed to the housing part 22.
- screws 27 are provided in the exemplary embodiment.
- the elongated holes 26, together with the screws 27, limit a movement of the crossbar 21 transversely to the wedge impact direction.
- the cross bar 21 can be moved between two end positions transversely to the wedge impact direction.
- the crossbar 21 assumes the locking position in the area of a first end position and the unlocking position in the area of a second end position.
- the cross bar 21 has on its underside facing the wedge 20 a control surface 25 which extends at least over a partial length of the cross bar 21 and which limits the stroke of the wedge 20 in the guide recesses 23 to different values depending on the position of the cross bar 21.
- control surface 25 has at least a first section 25a, which, when the crossbar 21 is brought into contact with the top of the wedge system rail 24 or the top of the wedge 20 in the locking position, is one Stroke of the wedge 20 is limited in a direction orthogonal to the toothed section 12 in such a way that the wedge 20 can be brought into engagement with the track teeth 13.
- the control surface 25 has a second section 25b, which, when the crossbar 21 is brought into contact with the top of the wedge system rail 24 or the top of the wedge 20 in the unlocking position, enables a larger stroke of the wedge 20.
- control surface 25 also has a transition region 25c between the first section 25a and the second section 25b.
- first section 25a has a slope such that the stroke becomes smaller and the wedge contact rail 24 or the wedge 20 is pressed more towards the toothed section 12 the further the cross bar 21 is into the locking position is spent.
- the transition section 25c preferably has a greater gradient than the first section 25a.
- the second section 25b preferably has no slope.
- the wedge 20 is arranged captively in the guide recesses 23.
- the wedge 20 has a projection at each of its two ends, which protrudes beyond the respective associated guide recess 23 in at least one direction.
- the wedge rail 24 is arranged captively in the guide recesses 23.
- the wedge system rail 24 has a projection at its respective axial ends, which projects beyond the respectively assigned guide recess 23 in at least one direction.
- the projection can be formed by welding or riveting a stop element.
- the wedge contact rail 24 has a contact surface on the underside, which forms a linear guide with a contact surface formed on the top of the wedge 20 in order to guide the wedge 20 in the wedge impact direction, the two stop surfaces preferably being designed to be complementary.
- the contact surface for the wedge 20 formed on the underside of the wedge contact rail 24, viewed in cross section, has a recess 28, the recess 28, as shown, preferably being designed as a trapezoidal recess.
- the depression 28 can also be designed, for example, as a triangular depression, as a depression with rounded edges, as a circular depression, as a rounded depression or by grooves.
- the recess 28 can also have a flat bottom 28a, from which side walls 28b extend in the direction of the wedge 20, which are at an angle of 30° to 60°, preferably 45°, to the bottom (28a). run outside. This is shown in particular in Figures 15 and 16.
- a trapezoidal depression 28 has proven to be particularly suitable for guiding the wedge 20.
- the contact surface formed on the top of the wedge 20 has side walls which are complementary to the side walls 28b of the contact surface of the wedge contact rail 24.
- the contact surface of the wedge 20, with which the wedge 20 rests on the contact surface of the wedge contact rail 24, in particular if this is designed as a trapezoidal recess 28, has two V-shaped projections 29a when viewed in cross section, between in which there is a V-shaped depression 29b.
- the two V-shaped projections 29a penetrate into the recess of the contact surface of the wedge contact rail 24.
- Each side wall of the V-shaped projection adjoins one of the side walls 28b of the contact surface of the wedge contact rail 24. This is shown enlarged in Figure 15.
- the housing part 22 and the cross bar 21 preferably have a U-shaped profile when viewed in cross section in the exemplary embodiment.
- the cross bar 21 is therefore, viewed in cross section, essentially formed from the bottom of the U-shaped profile and two side walls.
- the control surface 25 is formed on the free lower edges of the side walls of the U-shaped profile.
- the lower edges or the free ends of the side walls of the U-shaped profile are identical. The two lower edges together form the control surface 25.
- the clamping devices 7, 8, the wedge 20, the crossbar 21 and the wedge rail 24 are made of metal, preferably steel, in the exemplary embodiment.
- Figures 2 to 8 show a representation of the turnbuckle 1, in which the crossbar 21 is in the locking position and the wedge 20 is hammered into the clamping position.
- Figures 9 and 10 show a representation of the crossbar 21 in an unlocking position.
- Figure 12 shows a representation in which the top of the housing part 22 is removed so that the crossbar 21 can be seen from above.
- the crossbar 21 is cut in the longitudinal direction.
- Figure 12 serves in particular to illustrate the preferred arrangement of the crossbar 21 and also the representation of the elongated holes 26.
- FIG 13 shows a representation according to FIG -shaped profile) of the crossbar 21, in which the elongated holes 26 are located, not shown.
- Figure 14 shows a cross section through the second clamping device 8, with a wedge rail 24 being inserted into the guide recess 23 shown.
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Mechanical Engineering (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Mutual Connection Of Rods And Tubes (AREA)
- Clamps And Clips (AREA)
- Forms Removed On Construction Sites Or Auxiliary Members Thereof (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102022107429.3A DE102022107429A1 (de) | 2022-03-29 | 2022-03-29 | Spannschloss zum Verspannen von Rahmenschalungselementen |
| PCT/EP2023/057441 WO2023186685A1 (de) | 2022-03-29 | 2023-03-23 | Spannschloss zum verspannen von rahmenschalungselementen |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP4499951A1 true EP4499951A1 (de) | 2025-02-05 |
| EP4499951B1 EP4499951B1 (de) | 2026-02-25 |
| EP4499951C0 EP4499951C0 (de) | 2026-02-25 |
Family
ID=85937069
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP23715434.9A Active EP4499951B1 (de) | 2022-03-29 | 2023-03-23 | Spannschloss zum verspannen von rahmenschalungselementen |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US20250305305A1 (de) |
| EP (1) | EP4499951B1 (de) |
| CA (1) | CA3255327A1 (de) |
| DE (1) | DE102022107429A1 (de) |
| WO (1) | WO2023186685A1 (de) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102022107429A1 (de) | 2022-03-29 | 2023-10-05 | Peri Se | Spannschloss zum Verspannen von Rahmenschalungselementen |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2738859B1 (fr) | 1995-09-14 | 1998-01-16 | Deko | Pinces d'assemblage de panneaux de coffrage |
| ATE298027T1 (de) | 1999-09-23 | 2005-07-15 | Peri Gmbh | Spannschlossvorrichtung |
| DE10331359B4 (de) | 2003-07-11 | 2010-07-15 | Peri Gmbh | Spannschlossvorrichtung mit schräg geführtem Keil |
| US8205854B2 (en) * | 2008-03-10 | 2012-06-26 | Western Forms, Inc. | Form clamp |
| IT201900005146A1 (it) * | 2019-04-05 | 2020-10-05 | Faresin Formwork S P A | Morsa perfezionata per casserature per getti verticali |
| DE102022107429A1 (de) | 2022-03-29 | 2023-10-05 | Peri Se | Spannschloss zum Verspannen von Rahmenschalungselementen |
-
2022
- 2022-03-29 DE DE102022107429.3A patent/DE102022107429A1/de active Pending
-
2023
- 2023-03-23 CA CA3255327A patent/CA3255327A1/en active Pending
- 2023-03-23 US US18/851,337 patent/US20250305305A1/en active Pending
- 2023-03-23 WO PCT/EP2023/057441 patent/WO2023186685A1/de not_active Ceased
- 2023-03-23 EP EP23715434.9A patent/EP4499951B1/de active Active
Also Published As
| Publication number | Publication date |
|---|---|
| EP4499951B1 (de) | 2026-02-25 |
| WO2023186685A1 (de) | 2023-10-05 |
| CA3255327A1 (en) | 2025-05-10 |
| DE102022107429A1 (de) | 2023-10-05 |
| US20250305305A1 (en) | 2025-10-02 |
| EP4499951C0 (de) | 2026-02-25 |
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