Connecting clamp and formwork element with a connecting clamp

Description

[0001] The invention relates to a connecting clamp for formwork construction, in particular for concrete formwork construction, comprising an inner clamp arm and an outer clamp arm. The two clamp arms each have a clamp jaw and are movable relative to each other to adjust the clamp width of the connecting clamp. The inner clamp arm has a plug-in section that is inserted into a guide section of the outer clamp arm and guided therein. Furthermore, the invention also relates to a construction formwork, in particular for concrete formwork construction, comprising a formwork element and a connecting clamp.

[0002] Connecting clamps of the type mentioned above are known, for example, from the publications DE 20 2015 006 634 U1, EP 0 580 537 A2, and US 6767 154 B1, and are used for constructing construction formwork. Concrete walls and concrete ceilings are cast using the formwork. The connecting clamps are used to firmly connect formwork elements of the construction formwork in the operating position before the concrete is poured.

[0003] The object of the invention is to provide a connecting clamp of the type mentioned at the outset which, while having comparable or unchanged stability, has a lower weight than the previously known connecting clamps.

[0004] To achieve this object, the means and features of independent claim 1 directed to such a connecting clamp are proposed for a connecting clamp of the type mentioned at the outset. In particular, to achieve the object, it is proposed for the connecting clamp mentioned at the outset that the inner clamp arm has a hollow space, at least in its plug-in section. Until now, it was common practice in the prior art to manufacture the inner clamp arms of such connecting clamps from a solid material. The connecting clamp according to the invention is lighter than the connecting clamps of comparable size and load-bearing capacity previously known from the prior art. This is due to the hollow space in the plug-in section of the inner clamp arm. The hollow design of at least the plug-in section of the inner clamp arm makes it possible to achieve stability comparable to that of previously known connecting clamps with less material.The lower use of material directly results in the connecting clamp being lighter than the previously known and similarly stable connecting clamps.

[0005] In one embodiment of the connecting clamp, the inner clamp arm has a profile, at least in its plug-in section, that defines the cavity. The profile of the inner clamp arm can be designed such that it encloses the cavity on all sides. The profile of the clamp arm can be a closed profile, at least in the plug-in section of the clamp arm, or, for example, a hollow profile that is open on at least one side.

[0006] In one embodiment of the connecting clamp, the cavity is formed continuously in the insertion and / or guide direction in the plug-in section of the inner clamp arm. This allows for particularly significant weight savings.

[0007] To lock and / or clamp the connecting clamp in the use position, the connecting clamp can comprise a clamping element. The clamping element can be inserted through a recess in the outer clamp arm and a recess in the inner clamp arm and inserted in the locking and / or clamping position of the clamping element. In this way, the relative position of the two clamp arms can be fixed using the clamping element, and the connecting clamp, i.e., the two clamp arms, can be clamped against a formwork element gripped by the connecting clamp.

[0008] In one embodiment of the clamping element, the clamping element is provided with a clamping bevel with which the two clamp arms can be clamped against one another. In one embodiment, the clamping bevel is formed by a wedge-shaped outer contour and / or a surface profiling of the clamping element. The clamping bevel can have a gradient of at most 7 degrees, preferably less than 7 degrees. In this way, on the one hand, the desired clamping can be achieved when the clamping element is driven into its clamped position. On the other hand, the gradient is then sufficiently small to fix the clamping element self-locking in its clamped position. This can prevent the clamping element from being driven out of its clamped position due to the gradient of the clamping bevel under corresponding load, for example when the two clamp arms of the connecting clamp are pulled apart.

[0009] In one embodiment of the clamping element, it is provided that the clamping element has several consecutive clamping slopes. Furthermore, the clamping element can be provided with a pull-out protection device so that the clamping element can be permanently connected to the connecting clamp if necessary.

[0010] In one embodiment of the connecting clamp, the clamping element is adjustable between a clamping position and an adjustment position. In the adjustment position of the clamping element, the clamp arms can be moved relative to one another to change the clamping width of the connecting clamp. In one embodiment of the clamping element, this has a guide projection. This guide projection can be provided with at least one interruption. The at least one interruption in the guide projection can be arranged and / or designed on the clamping element in such a way that the interruption in the guide projection allows the two clamp arms of the connecting clamp to be moved relative to one another when the clamping element has assumed its adjustment position relative to the clamp arms.

[0011] In one embodiment of the connecting clamp, the guide section of the outer clamp arm has a hollow profile that matches the plug-in section of the inner clamp arm. This allows for a further weight reduction of the connecting clamp without compromising its stability.

[0012] In a preferred embodiment of the connecting clamp, it is provided that the inner clamp arm and / or the outer clamp arm each has / have a profile, in particular a hollow profile, with a rectangular and / or oval and / or oval-rectangular basic shape. A rectangular, preferably non-square basic shape is advantageous in order to increase the bending load capacity of the corresponding clamp arm. Preferably, a long side of the rectangular and / or oval and / or oval-rectangular basic shape of the profile(s) can be aligned in the direction of the clamp jaws of the clamp arms. In this way, the rectangular and / or oval and / or oval-rectangular basic shape or the rectangular and / or oval and / or oval-rectangular cross-section of the profile(s) is aligned with the main load directions of the connecting clamp for maximum bending load capacity, which can promote the stability of the connecting clamp.

[0013] In one embodiment of the connecting clamp, the inner clamp arm has a step and / or a grid. This makes it possible to insert and / or maintain a clamping element, such as the previously mentioned one, which can also function as a locking element, into its clamping and / or locking position when the clamp arms are in different relative positions to one another.

[0014] The gradation and / or the grid can define different clamp widths for the connecting clamp. This allows the clamp width to be increased or decreased as desired, for example, to allow the connecting clamp to be used when intermediate elements are to be inserted between two formwork elements to compensate for construction dimensions and / or tolerances.

[0015] In one embodiment of the connecting clamp, the connecting clamp has a support surface for a compensating element. The support surface can preferably extend over an entire clamping space of the connecting clamp. The tension of the connecting clamp can be the space outlined by the two clamp arms. It is also possible for the connecting clamp to have a support surface for a compensating element that extends over a large part of or the entire length of the guide section of the outer clamp arm. The clamp jaws can each be arranged and / or formed on a jaw limb of the respective clamp arm. At this point, it should be noted that the clamp jaw of the outer clamp arm can form a right angle with the guide section of the outer clamp arm. Furthermore, the clamp jaw of the inner clamp arm can likewise form a right angle with the plug-in section of the inner clamp arm.

[0016] In one embodiment of the connecting clamp, it is provided that the guide section of the outer clamp arm and the plug-in section of the inner clamp arm are dimensioned such that the guide section encompasses and supports the plug-in section when the clamp width of the connecting clamp is set to its maximum.

[0017] In one embodiment of the connecting clamp, the guide section supports the plug-in section when the connecting clamp is set to its maximum clamping width, particularly on both sides, in the area of ​​one jaw leg of the inner clamp arm. This gives the connecting clamp an attractive appearance in all working positions. It also ensures that the outer clamp arm of the connecting clamp can support a load over its entire length, even in this most extended position. Ultimately, this allows the inner gripping arm to be designed with less stability and correspondingly less material usage, and thus also with a correspondingly lower weight.

[0018] Each of the two clamp arms can have a jaw leg on which a clamp jaw of the two clamp jaws of the connecting clamp is formed and / or arranged. The jaw leg of the inner clamp arm can be oriented transversely or at right angles to the plug-in section of the inner clamp arm. The jaw leg of the outer clamp arm can be oriented transversely or at right angles to the guide section of the outer clamp arm.

[0019] According to the invention, the guide section of the outer clamp arm encompasses the plug-in section of the inner clamp arm in a more than U-shaped configuration. The guide section of the outer clamp arm can have a guide recess. A jaw leg of the inner clamp arm can be displaceable in the guide recess. Preferably, the inner clamp arm is held in the guide section of the outer clamp arm in a form-fitting manner in the longitudinal direction of its jaw leg. In this way, the plug-in section of the inner clamp arm can be guided particularly reliably and with as little play as possible in the guide section of the outer clamp arm.

[0020] Finally, to achieve the object, a construction formwork with at least one formwork element and with at least one connecting clamp according to one of the preceding claims is also proposed.

[0021] The invention will now be described in more detail using an embodiment, but is not limited to this embodiment.

[0022] They show, in a partly highly schematic representation: Figures 1 and 2 are perspective views of a connecting clamp with an outer clamp arm and an inner clamp arm positioned with its plug-in section in a guide section of the outer clamp arm, wherein the relative position of the two clamp arms to each other is secured by a clamping element in the use position, Figures 3 and 4 are a partially cut-away view of the Figures 1 and 2shown connecting clamp to illustrate the function of the tensioning element for tensioning and locking the connecting clamp, Figure 5 a front view of the connecting clamp shown in the previous figures with two formwork elements gripped by the connecting clamp at their edge webs, Figure 6 a view along the line VI-VI in Figure 5 sectional plan view of the connecting clamp shown in the previous figures, Figure 7 a rear view of the connecting clamp shown in the previous figures, and Figure 8 a view along the line VIII-VIII in Figure 7 Sectional side view of the connecting clamp shown in the previous figures.

[0023] All figures show a connecting clamp, designated as a whole with 1, for formwork construction, in particular for concrete formwork construction.

[0024] The connecting clamp 1 comprises an inner clamp arm 2 and an outer clamp arm 3. The two clamp arms 2 and 3 each have a clamp jaw 4 and can be moved towards each other to change the clamping width of the connecting clamp 1. The inner clamp arm 2 has a plug-in section 5. In the use position of the connecting clamp 1, the plug-in section 5 is inserted into a guide section 6 of the outer clamp arm 3 and is slidably guided therein.

[0025] The inner clamp arm 2 has a hollow space 7 at least in its plug-in section 5. In particular, the sectioned and partially sectioned views of the connecting clamp 1 illustrate that the inner clamp arm 2 has a profile, at least in its plug-in section 5, that defines the hollow space 7. The profile of the plug-in section 5 of the inner clamp arm 2 can therefore be referred to as a hollow profile, which has a hollow cross-section that is closed at least in sections of the hollow profile.

[0026] The sectional views further illustrate that the cavity 7 is continuous in the insertion and / or guide direction, which is predetermined by the guide section 6 of the outer clamp arm 3.

[0027] The connecting clamp 1 further comprises a clamping element 8, which can also be referred to as a locking element. The clamping element 8 serves to lock and / or clamp the connecting clamp 1. For this purpose, the clamping element 8 is inserted through a recess 9 in the outer clamp arm 3 and through a recess 10 in the inner clamp arm 2. All figures illustrate that the clamping element 8 has a clamping bevel 11.

[0028] The clamping bevel 11 can be used to clamp the two clamp arms 2 and 3 against each other. The clamping bevel 11 is formed by a wedge-shaped outer contour of the clamping element 8. The clamping bevel 11 has a maximum gradient of 7 degrees. Thus, the clamping element 8 can be used to clamp the connecting clamp 1 and simultaneously to securely lock the connecting clamp 1, as it sits in the two recesses 9 and 10 of the two clamp arms 2 and 3 with self-locking. With the help of a pull-out protection device (not shown in the figures), the clamping element 8 can be locked in its Figures 1, 2 and 4 to 8. For this purpose, a split pin can be used, for example, to prevent it from being pulled out.

[0029] The clamping element 8 can be moved between a clamping position (see Figures 1, 2 and 4 to 8) and an adjustment position (see Figure 3). In the adjustment position of the clamping element 8, the two clamp arms 2 and 3 can be moved relative to each other to change the clamping width of the connecting clamp 11. In this way, the clamping width of the connecting clamp 1 can be adjusted without having to pull the clamping element 8 out of the two recesses 9 and 10 of the two clamp arms 2 and 3.

[0030] The clamping element 8 also has a guide projection 12, which fits particularly well in the Figures 1 , 7 and 8 can be seen. The guide projection 12 is provided with two interruptions 13 through which the profile of the plug-in section 5 of the inner clamp arm 2 can be pushed when the clamping element 8 is arranged in its adjustment position. When the clamping element 8 is arranged in its adjustment position according to Figure 3is arranged, the profile of the plug-in section 5 of the inner clamp arm 2 can be guided through these interruptions 13. In this way, the clamping width of the connecting clamp 1 can be adjusted, even if the clamping element 8 is not completely pulled out of the two recesses 9 and 10 of the two clamp arms 2 and 3.

[0031] The sectional view of the connecting clamp 1 from Figure 8 clarifies that the guide section 6 of the outer clamp arm 3 has a hollow profile that matches the plug-in section 5 of the inner clamp arm 2. The inner clamp arm 2 and the outer clamp arm 3 thus each have a hollow profile that, starting from a rectangular or oval, non-circular basic shape, has rounded corners and / or inner edges. One long side of the basic shape of the profiles is aligned in the direction of an extension direction of the clamp jaws 4 of the two clamp arms 2 and 3, indicated by the arrow A1.

[0032] Figure 6 clarifies that the inner clamp arm 2 is provided with a step or grid 14 in the area of ​​the plug-in section 5. The grid 14 defines different clamp widths of the connecting clamp 1 and allows the clamping element 8 to be inserted into the recesses 9 and 10 when the clamp arms 2 and 3 are in different relative positions to one another.

[0033] The connecting clamp 1 has a support surface 15 for a compensating element not shown in the figures. The support surface 15 preferably extends over the entire length of the guide section 6 of the outer clamp arm 3 and thus over large parts of the clamping space of the connecting clamp 1.

[0034] Each clamp arm 2 and 3 has a jaw leg 17. A clamp jaw 4 is formed on each jaw leg 17. The jaw leg 17 of the inner clamp arm 2 protrudes at a right angle from the plug-in section 5. The jaw leg 17 of the outer clamp arm 3 protrudes at a right angle from the guide section 6.

[0035] The guide section 6 is designed to support the plug-in section 5 on both sides in the area of ​​the jaw leg 17 of the inner clamp arm 2 when the connecting clamp 1 is at its maximum clamping width. For this purpose, the plug-in section 5 is as long as the guide section 6.

[0036] The guide section 6 of the outer clamp arm 3 surrounds the plug-in section 5 of the inner clamp arm 2 in a more than U-shaped manner. This is particularly clearly visible in the sectional view according to Figure 8can be seen. The guide section 6 of the outer clamp arm 3 is provided with a guide recess 16. The jaw leg 17 of the inner clamp arm 2, on which the clamp jaw 4 of the inner clamp arm 2 is arranged or formed, is slidably guided in this guide recess 16. Due to the profile of the guide section 6 of the outer clamp arm 3, the plug-in section 5 of the inner clamp arm 2 is held in a form-fitting manner in the guide section 6 of the outer clamp arm 3 in the longitudinal direction of its jaw leg 17, and therefore cannot be pulled out of the guide section 6 in the direction of the longitudinal extent of its jaw leg 17. The guide section 16 has an insertion opening 18, which is formed at a free end of the guide section 6 facing away from a jaw leg 17 of the outer clamp arm 3. Through this insertion opening 18, the jaw leg 17 of the inner clamp arm 2 can be inserted into the guide recess 16.

[0037] The clamp jaws 4 are each provided with a holding projection 19 which, in the position of use of the connecting clamp 1, engages in a corresponding holding opening 20 of a formwork element 21.

[0038] Figure 5 now shows a construction formwork, designated as a whole by 22 and shown only very schematically. The construction formwork 22 comprises two formwork elements 21, whose edge webs 23 are held together with the connecting clamp 1.

[0039] The invention relates to technical improvements in the field of formwork technology. For this purpose, the connecting clamp 1 is proposed, which comprises the inner clamp arm 2 and the outer clamp arm 3. The inner clamp arm 2 is slidably guided with its plug-in section 5 in the guide section 6 of the outer clamp arm 3. To reduce weight, the inner clamp arm 2 has a hollow space 7 at least in the area of ​​its plug-in section 5. List of reference symbols

[0040] 1Connecting clamp 2Inner clamp arm 3Outer clamp arm 4Clamp jaw 5Plug-in section 6Guide section 7Cavity 8Clamping element / locking element 9Recess in 3 10Recess in 2 11Clamping bevel 12Guide projection 13Interruptions in 12 14Grid 15Support surface 16Guide recess 17Jaw leg 18Insertion opening 19Retaining projection 20Retaining opening 21Formwork element 22Formwork 23Edge web

Claims

1. Connection clamp (1) for formwork construction having an inner clamp arm (2) and an outer clamp arm (3), wherein the two clamp arms (2, 3) each have a clamp jaw (4) and can be moved relative to one another in order to change a clamp width of the connection clamp (1), and wherein the inner clamp arm (2) has a plug-in portion (5) which is plugged into, and guided in, a guide portion (6) of the outer clamp arm (3), wherein the inner clamp arm (2) has a cavity (7) at least in its plug-in portion (5), characterized in that the guide portion (6) of the outer clamp arm (3) engages around the plug-in portion (5) of the inner clamp arm (2) in a more than U-shaped manner, wherein the guide portion (6) has a guide cutout (16) in which a jaw limb (17) of the inner clamp arm (2) can be displaced, and wherein the inner clamp arm (2) is retained, in a direction of longitudinal extent of its jaw limb (17), in the guide portion (6) of the outer clamp arm (3) in a form-fitting manner.

2. Connection clamp (1) according to Claim 1, characterized in that the connection clamp (1) comprises a clamping element (8) which is and / or can be introduced through a cutout (9) of the outer clamp arm (3) and a cutout (10) of the inner clamp arm (2) in order to lock and / or brace the connection clamp (1), wherein the clamping element (8) can be adjusted between a clamping position and an adjustment position, in which the two clamp arms (2, 3) can be displaced relative to one another in order to change a clamp width of the connection clamp (1), and / or in that the clamping element (8) has a guide projection (12) which is provided with at least one interruption (13).

3. Connection clamp (1) according to Claim 1 or 2, characterized in that the inner clamp arm (2) has, at least in its plug-in portion (5), a profile which defines the cavity (7), in particular a hollow profile which encloses the cavity (7) on all sides.

4. Connection clamp (1) according to one of Claims 1 to 3, characterized in that the cavity (7) is of continuous form in a plugging-in and / or guide direction.

5. Connection clamp (1) according to Claim 1, characterized in that the connection clamp (1) comprises a clamping element (8) which is and / or can be introduced through a cutout (9) of the outer clamp arm (3) and a cutout (10) of the inner clamp arm (2) in order to lock and / or brace the connection clamp (1).

6. Connection clamp (1) according to one of the preceding Claims 2 to 5, characterized in that the clamping element (8) has a clamping bevel (11) by means of which the two clamp arms (2, 3) can be braced in relation to one another, in particular wherein the clamping bevel (11) is formed by a wedge-like outer contour and / or a surface profiling of the clamping element (8) and / or in particular wherein the clamping bevel (11) has a pitch of at most 7°.

7. Connection clamp (1) according to one of the preceding claims, characterized in that the clamping element (8) has a plurality of successive clamping bevels (11), and / or in that the clamping element (8) has a pull-out prevention means.

8. Connection clamp (1) according to one of the preceding claims, characterized in that the guide portion (6) of the outer clamp arm (3) has a hollow profile that matches the plug-in portion (5) of the inner clamp arm (2).

9. Connection clamp (1) according to one of the preceding claims, characterized in that the inner clamp arm (2) and / or the outer clamp arm (3) have / has in each case a profile, in particular a hollow profile, with a rectangular and / or oval and / or rectangular-oval basic shape, preferably wherein the profile has rounded corners and / or edges.

10. Connection clamp (1) according to Claim 9, characterized in that a long side of the rectangular basic shape of the profile / of the profiles is oriented in the direction of the clamp jaws (4) of the clamp arms (2, 3).

11. Connection clamp (1) according to one of the preceding claims, characterized in that inner clamp arm (2) has a gradation and / or a grid (14), which defines different clamp widths of the connection clamp (1), such that a or the clamping element (8) can be or is introduced in the case of clamp arms (2, 3) which are located in different positions relative to one another.

12. Connection clamp (1) according to one of the preceding claims, characterized in that the connection clamp (1) has a support surface (15) for a compensation element, said support surface preferably extending over the majority of or over the entire length of the guide portion (6) of the outer clamp arm (3).

13. Connection clamp (1) according to one of the preceding claims, characterized in that in the case of the maximally set clamp width of the connection clamp (1), the guide portion (6) supports the plug-in portion (5), in particular on both sides, in the region of a jaw limb (17) of the inner clamp arm (2).

14. Construction formwork (22) having at least one formwork element (21) and having at least one connection clamp (1) according to one of the preceding claims.