DE20120033U1 - Clamp device, in particular form clamp - Google Patents

Abstract

A building construction clamp retains panels in place while concrete sets. The clamp is fabricated as a profile that surrounds the spindle thread on three sides, leaving one side open. The first shank is joined to a profiled element to the clamp frame. The profile at least partly surrounds the frame at least partly as seen in cross section. The second shank can be repositioned in a longitudinal sliding action using a second connecting profile partially surrounding the clamp frame. The interior thread element is connected to the clamp frame open side to the second connector profile.

Description

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-1-DESCRIPTION

Clamping device, in particular scarf clamp TECHNICAL FIELD '

The present invention relates to a clamp device, in particular a scarf clamp, with a clamp carrier, a threaded spindle rotatably mounted on the clamp carrier, which meshes in an internal thread element, a first fixed leg and a second leg displaceably mounted on the clamp carrier, the position of which can be adjusted by rotating the threaded spindle in the longitudinal direction of the clamp carrier.

STATE OF THE ART

In the known formwork clamps of the type mentioned above, the threaded spindle runs above or below the clamp support. This often leads to the threaded spindle becoming dirty, for example due to baked-on concrete material, which impairs long-term reliable function. Removing such dirt is complex and time-consuming. Because the threaded spindle is more or less freely accessible, there is a risk that the spindle will be damaged as a result of rough construction site conditions and that the formwork clamp can therefore no longer be used.

DESCRIPTION OF THE INVENTION

Based on the above-mentioned prior art, the present invention is based on the technical problem or task of specifying a clamping device, in particular a formwork clamp, which

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11 December 2001

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ensures long-term, reliable function, has a simple, robust construction that can be manufactured economically, and enables easy assembly and disassembly.

The clamp device according to the invention of the type mentioned at the outset is given by the features of independent claim 1. Advantageous embodiments and further developments are the subject of the claims directly or indirectly dependent on claim 1.

The clamp device according to the invention is accordingly characterized in that the clamp carrier is designed as a profile that surrounds the threaded spindle on at least three sides and has an open side, the first leg is connected to the clamp carrier via a first connection profile element that surrounds the clamp carrier in a form-fitting manner at least in part in cross-section, the second leg is connected to the clamp carrier in a longitudinally displaceable manner via a second connection profile element that surrounds the clamp carrier in a form-fitting manner at least in part in cross-section, and the internal thread element is connected to the second connection profile element via the open side of the clamp carrier. By designing the clamp carrier as a profile that surrounds the threaded spindle on at least three sides, the threaded spindle itself is largely protected from contamination, in particular from concrete, which ensures permanently reliable function.

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A particularly simple and robust design that can be produced economically is characterized by the fact that the clamp carrier is designed as a U- or C-profile and the first and/or second

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Connecting profile element has a square hollow profile cross-section whose clear internal dimensions are slightly larger than the clear external dimensions of the clamp support.

A particularly advantageous embodiment with regard to the manufacture of the clamp device according to the invention is characterized in that the second connection profile element has a recess in which the internal thread element is positively mounted against rotation and longitudinal displacement. The internal thread element is thus simply inserted into the recess of the second connection profile element and is fixed in its position after the threaded spindle is screwed into its internal thread. Additional connection measures such as welding or the like are not required.

A particularly simple design is characterized in that the internal thread element has a square peripheral contour with a square cross-section and the recess of the second connection profile element has a corresponding square cross-section recess.

A particularly advantageous design is characterized in that the first and/or second connection profile element has front edges inclined to the longitudinal axis of the clamp carrier, i.e., when viewed from the side, has/have a parallelogram-like circumferential contour. The parallelogram-like design results in better leverage ratios when clamping the clamp device while at the same time making optimal use of material. Overall, this means that a longer guide length is available when moving the legs while at the same time using less material, which ensures permanently reliable function and tilt-free assembly.

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A preferred embodiment variant, which enables shorter assembly times, is characterized in that the clamp carrier has grid recesses arranged in a grid, the first connection profile element is mounted on the clamp carrier so that it can be moved longitudinally, and a fixing element is present on the first connection profile element, which can be releasably brought into engagement with a respective grid recess. The fixing element is preferably acted upon by a spring element.

An embodiment which is particularly simple in terms of construction but nevertheless ensures a permanently reliable fixation is characterized in that the fixing element is designed as a hook-shaped fixing pin with a hook region and a stem region and the stem region is mounted in a longitudinally displaceable manner in a holding sleeve connected to the first connection profile element and the hook region can be releasably brought into engagement with a respective grid recess.

Steel is the preferred material for the clamping device.

Further embodiments and advantages of the invention result from the features further listed in the claims and from the exemplary embodiment given below. The features of the claims can be combined with one another in any way, provided they do not obviously exclude one another. 30

SHORT DESCRIPTION OF THE DRAWING

The invention as well as advantageous embodiments and further developments thereof are described in more detail below with reference to the example shown in the drawing.

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The features shown in the description and the drawing can be used individually or in combination in accordance with the invention. They show:

Fig. 1 schematic perspective view of a clamp device with a clamp carrier surrounding a threaded spindle on three sides in a bottom view,

Fig. 2 schematic perspective view of the clamp device according to Fig. 1 in a top view,

Fig. 3 schematic detailed perspective view of the clamp device according to Figs. 1 and 2 in an enlarged view with square internal thread element in which the threaded spindle meshes,

Fig. 4 schematic detailed perspective of the clamp device according to Figs. 1 and 2 in the connection area of a fixed leg,

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Fig. 5 schematic cross-section through the clamp device according to Figs. 1 and 2 along the section line I-I in Fig. 2,

Fig. 6 schematic cross-section through the clamp device according to Figs. 1 and 2 along the section line I-I in Fig. 2, but with a cross-section C-shaped clamp carrier and square internal thread element and

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Fig. 7 schematic cross section through the clamp device according to Figs. 1 and 2 along the section line I-I in Fig. 2, but with a clamp carrier with a C-shaped cross section and hexagonal internal thread element. _g.

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WAYS TO CARRY OUT THE INVENTION

The embodiment of a clamping device 10 shown in the figures is preferably used for creating support structures for formwork when concreting buildings.

The clamp device 10 has a clamp carrier 12 which is designed as a U-profile. A threaded spindle 14 is arranged within the I-profile cross section of the clamp carrier 12. In the figures, the threaded spindle 14 is drawn only as a round profile without showing its external thread.

In the right end area of the clamp support 12 in Figure 1, a cross disk 50 is welded, which has a recess within which the threaded spindle 14 is rotatably mounted. In the right end area of the threaded spindle 14 protruding from the clamp support 12 in Figure 1, a hand crank 16 is connected to the threaded spindle 14, by means of which the threaded spindle 14 can be set in rotation.

The clamp device 10 has a first leg 20 and a second leg 22. Both legs 20, 22 are connected to the clamp carrier 12 via a first connection profile element 26 or a second connection profile element 28. Both connection profile elements 26, 28 are designed as rectangular hollow profile elements that enclose the U-profile cross section of the clamp carrier 12, wherein the clear inner dimensions of the connection profile elements 26, 28 are slightly larger than the clear outer dimensions of the clamp carrier 12.

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The first leg 20 closest to the hand crank 16 is designed as a fixed leg during the clamping process. The first leg 20 is fixed to the clamp carrier 12 via a fixing pin 34, which has a hook area and a handle area 48. The handle area 48 is mounted in a holding sleeve 38 connected to the first connection profile element 26 so that it can be moved longitudinally (arrow Z in Figure 4). The hook area 46 of the fixing pin is guided through a recess 52 on the top of the first connecting profile element 26 in order to fix the first leg 20, which recess is brought into alignment with a respective grid recess 32 on the upper web of the U-profile of the clamp support 12, wherein the hook area 46 of the fixing pin 34 is inserted in a form-fitting manner into a respective grid recess 32 of the clamp support 12 for fixing.

In the lower end area of the stem area 48 of the fixing pin 34, a clamping pin 44 is arranged transversely to the longitudinal axis. Between the clamping pin 44 and the underside of the holding sleeve 38, a spring element 36 is arranged, which exerts a force on the fixing pin 34 in the opposite direction to the direction of the arrow Z, i.e. in the direction of the positive locking with the grid recess. The upper hook area 46 of the fixing pin 34 is gripped by a pull ring 42, which allows the fixed first leg 20 to be easily released by simply pulling the pull ring 42 upwards in the direction of the arrow Z. With this design, a quick adjustment of the "fixed" leg 20 is easily possible, which leads to shorter assembly times overall.

Both the first connection profile element 26 and the second connection profile element 28 have front side edges 40 inclined to the longitudinal direction of the clamp carrier 12, 5 so that in a side view the connection profile

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elements 26, 28 have a parallelogram-like circumferential contour. This results in better leverage ratios when clamping and at the same time optimum material utilization. Furthermore, a longer guide length on the clamp carrier 12 results when moving the legs 20, 22, which ensures long-term reliable function.

The second leg 22 is mounted on the clamp support 12 so that it can be moved longitudinally. The displacement of the second leg 22 is effected by turning the hand crank 16 and thus the threaded spindle 14. In structural terms, this is implemented in that a rectangular recess 30 is provided in the wall of the second connecting profile element 28 parallel to the open side of the clamp support 12, into which an internal thread element 24 is inserted in a form-fitting manner in cross-section, which projects into the interior of the U-profile of the clamp support 12 and has an internal thread 25 in this area, in which the threaded spindle 14 meshes. The internal thread element 24 is secured against twisting and longitudinal displacement by being mounted in the recess 30.

When producing the clamp device 10, the first connection profile element 26 is first pushed with the first leg 20 onto the clamp carrier 12. The second connection profile element 28 with the second leg 22 is then also pushed onto the clamp carrier 12. The internal thread element 24 is then pushed in from the outside via the recess 30, the internal thread element being held in the recess 30 in a form-fitting manner against rotation in the pushed-in state. The threaded spindle 14 is then inserted and screwed into the internal thread 25 of the internal thread element 24. The threaded spindle ¹¹⁴ is thereby fixed in its cross-sectional position within the cross-section of the clamp carrier 12.

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By simply turning the hand crank 16, the second leg 22 is moved into the appropriate position during use.

As can be seen in Figure 5, in the present embodiment the internal thread element 24 is designed as a square nut. The width B of the internal thread element 24 is dimensioned such that when the clamp device 10 is assembled after the internal thread element 24 has been inserted into the recess 30 of the second connection profile element, it cannot fall into the interior of the U-profile of the clamp carrier 12, in which it first comes into contact with the inner wall of the web of the U-profile of the clamp carrier 12. The height H of the internal thread element 24 is therefore slightly smaller than the height of the rectangular recess 30. Additional fastening measures for the internal thread element 24 are not required. After the threaded spindle 14 has been screwed into the internal thread 25 of the internal thread element 24, a clear positional fixation of the individual components is ensured with regard to long-term reliable function.

Figure 6 shows a cross-section of a formwork clamp 10.1 which has essentially the same structure as the formwork clamp 10 according to Figure 5. One difference is that a C-profile is used as the clamp support 12.1, which has inward-facing edges 54, wherein the distance between the front end sides of the edges 54 is slightly greater than the height H of the internal thread element 24.

The sectional view according to Figure 7 shows a formwork clamp 10.2 corresponding to the structure according to the formwork clamp 10.1 of Figure 6. However, the formwork clamp 10.2 has a

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-&Igr;&Ogr;&Igr; nn engewindeelement 24.1 is used, which has a hexagonal peripheral contour. This internal thread element 24.1 is also positively mounted in the recess 30 against rotation and longitudinal displacement and has a width B which prevents the internal thread element 24.1 from falling into the interior of the clamp carrier 12.2.

When producing the formwork clamp 10.2, the internal thread element 24.1 cannot be inserted from the outside through the recess 3 0. Instead, the internal thread element 24.1 is manually pushed laterally into the second connection profile element 28 until it is at the level of the recess 30 and then aligned transversely to the recess 30. The clamp carrier 12.2 is then pushed into the second connection profile element 28 until it comes to a stop with the internal thread element 24.1. The internal thread element 24.1 is then manually moved in the direction of the recess 3 0 so that the clamp carrier 12.2 can then be pushed further through the second connection profile element 28. This position is shown in Figure 7. The internal thread element 24.1 with a hexagonal peripheral contour engages in the recess 3 0 in some areas so that it is secured against twisting and longitudinal displacement. As soon as the threaded spindle 14 is screwed into the internal thread 25 of the internal thread element 24, a relative displacement between the clamp carrier 12.2 and the second connecting profile element 28 is possible.

Claims (11)

1. Clamping device ( 10 ), in particular a clamping device, with - a clamp carrier ( 12 , 12.1 ), - a threaded spindle ( 14 ) rotatably mounted on the clamp carrier ( 12 , 12.1 ) which meshes with an internal thread element ( 24 , 24.1 ), - a first fixed leg ( 20 ) and - a second leg ( 22 ) which is slidably mounted on the clamp support ( 12 , 12.1 ), the position of which can be adjusted by turning the threaded spindle ( 14 ) in the longitudinal direction of the clamp support ( 12 , 12.1 ), characterized in that - the clamp carrier ( 12 ) is designed as a profile surrounding the threaded spindle ( 14 ) on at least three sides with one open side, - the first leg ( 20 ) is connected to the clamp carrier ( 12 , 12.1 ) via a first connecting profile element ( 26 ) which surrounds the clamp carrier ( 12 , 12.1 ) in a form-fitting manner at least in part in cross-section, - the second leg ( 22 ) is connected to the clamp carrier ( 12 ) in a longitudinally displaceable manner via a second connecting profile element ( 28 ) which surrounds the clamp carrier ( 12 ) in a form-fitting manner at least in part in cross-section, and - the internal thread element ( 24 ) is connected to the second connection profile element ( 28 ) via the open side of the clamp carrier ( 12 ). 2. Clamp device according to claim 1, characterized in that the clamp carrier ( 12 ) is designed as a U- or C-profile and the first and/or second connecting profile element ( 26 , 28 ) have a square hollow profile cross-section whose clear inner dimensions are slightly larger than the clear outer dimensions of the clamp carrier ( 12 ). 3. Clamp device according to claim 1 and/or 2, characterized in that the second connection profile element ( 28 ) has a recess ( 30 ) in which the internal thread element ( 24 ) is positively mounted against rotation and longitudinal displacement. 4. Clamp device according to claim 3, characterized in that the internal thread element ( 24 ) has a square peripheral contour with a square cross section and the recess ( 30 ) of the second connection profile element ( 28 ) has a corresponding square cross-sectional recess ( 30 ). 5. Clamp device according to one or more of claims 1 to 3, characterized in that the internal thread element ( 24.1 ) has a hexagonal peripheral contour. 6. Clamp device according to one or more of the preceding claims, characterized in that the first and/or second connection profile element ( 26 , 28 ) has front side edges ( 40 ) inclined to the longitudinal axis of the clamp carrier ( 12 ), that is to say has/have a parallelogram-like peripheral contour when viewed in a side view. 7. Clamp device according to one or more of the preceding claims, characterized in that - the clamp carrier ( 12 ) has grid-like recesses ( 32 ), - the first connecting profile element ( 26 ) is mounted on the clamp carrier ( 12 ) so as to be longitudinally displaceable and - a fixing element ( 34 ) is present on the first connection profile element ( 26 ), which can be releasably brought into engagement with a respective grid recess ( 32 ). 8. Clamp device according to claim 7, characterized in that the fixing element ( 34 ) is acted upon by a spring element ( 36 ). 9. Clamp device according to claim 7 or 8, characterized in that the fixing element ( 34 ) is designed as a hook-shaped fixing pin with a hook region ( 46 ) and a stem region ( 48 ) and the stem region ( 48 ) is mounted so as to be longitudinally displaceable in a holding sleeve ( 38 ) connected to the first connection profile element ( 26 ) and the hook region ( 46 ) can be releasably brought into engagement with a respective grid recess ( 32 ). 10. Clamp device according to one or more of the preceding claims, characterized in that the first and/or second leg ( 20 , 22 ) has/have a T-shaped profile and the flange of the T-profile forms the contact pressing surface. 11. Clamp device according to one or more of the preceding claims, characterized in that the clamp device consists of steel, aluminum or plastic.