TENSION CLAMP

Description

[0001] The present invention relates to a clamp, in particular a pipe clamp, with a clamping band which has a first end, a second end opposite thereto and at least one recess, such that one of the two ends is guided through the recess in the radial direction of the clamp from the inside to the outside, so that both ends are arranged on the outer circumference of the clamp.

[0002] WO 2013 / 156830 A1 discloses a tensioning strap for connecting pipes. The tensioning strap has two ends that can be pushed apart using a tensioning screw to tighten the strap. A disadvantage of such a tensioning strap is that its holding force is limited.

[0003] US 2,363,206 A1 discloses a clamping band whose ends can be pulled together using a screw to secure a hose. A hose clamp is disclosed that includes a band construction with a slot through which a tongue is passed. The band is rolled up and overlapped, so that the tongue is guided from the inside of the band to the outside. A clamp is used to bring the band ends together and allow circumferential movement of the tongue relative to the band. A connecting piece ("tie") bridges the slot to connect the band parts on both sides and hold the band in position. This design prevents the clamp from shifting and allows for even pressure distribution.

[0004] FR 2,685,433 A1 discloses a clamp mechanism for securing a flexible sheath to a cylindrical element, such as a cable. The clamp comprises a flexible band with a first constant width and a second wider section having an elongated slot. This arrangement allows a first part to engage the slot of a second part and to be clamped before closing the clamp. at least one turn around the sleeve, thereby achieving an even clamping over the entire clamping circumference.

[0005] The object of the present invention is therefore to improve the state of the art.

[0006] The problem is solved by a clamp and the use of a clamping band as the said clamp with the features of the independent patent claims.

[0007] A clamp is proposed. The clamp can be a pipe clamp, for example, so that it can be used to connect pipes. It is advantageous if the clamp is made of metal in order to be able to withstand high forces. The clamp can also be arranged on a pipe coupling, by means of which two pipes are connected. The clamp can press the pipe coupling or a seal onto a pipe end. The clamp can thus be squeezed onto the pipe with the pipe coupling arranged between the pipe and the clamp.

[0008] The clamp has a clamping band. The clamping band is band-shaped and, when used as intended, wraps around the pipe or pipe coupling at least once, in particular several times and / or in multiple layers in the circumferential direction. Thus, when used as intended, the clamping band is rolled up, wound, wound, or wraps around the pipe in the circumferential direction. A tensioning force can be applied to the clamping band, so that the clamp is pressed onto the pipe.

[0009] Furthermore, the tensioning strap has a first end and a second end, in particular one opposite thereto. The tensioning strap extends between the two ends.

[0010] Furthermore, the clamping band has at least one recess. The recess is continuous, so that the clamping band has an opening or through-hole. One of the two ends extends through the recess in the radial direction of the clamping band from the inside to the outside, so that both ends are located on the outer circumference of the clamping band.

[0011] When used as intended, one of the two ends is guided through the recess, thereby forming the tensioning clamp. For the description of the invention, it can be useful if the tensioning band is not yet wound up into the tensioning clamp or if the tensioning band is wound up into the tensioning clamp. Furthermore, when used as intended, the tensioning clamp or the tensioning band is closed in the circumferential direction. When used as intended, the tensioning clamp wraps around the pipe in the circumferential direction. The tensioning clamp is therefore annular. When wound up, rolled up or rolled up into the tensioning clamp, the tensioning band is preferably spiral-shaped, with both ends on the outer circumference. The tensioning band is oriented in only one direction. The tensioning band is loop-free. The tensioning band has a single winding direction.

[0012] When both ends of the clamping band are positioned on the outer circumference of the clamp, the clamping band can be subjected to a clamping force to squeeze the clamp onto the pipe. The two ends can thus be pulled closer together.

[0013] According to the invention, the tensioning band has at least one overlapping region extending in the circumferential direction of the tensioning clamp, in which overlapping region the tensioning band lies on top of one another in at least two layers in the radial direction. In intended use, the at least two layers of the tensioning band lie against one another in the overlapping region in the radial direction, in particular directly. As a result, static friction is formed between the layers during intended use. In the overlapping region, when the tensioning band is pressed onto the pipe, a radially outer region or section of the tensioning band presses against an underlying region or section of the tensioning band. Static friction can form in the overlapping region, so that the holding force is increased when the tensioning clamp is pressed onto the pipe. In the overlapping region, a self-locking mechanism can also be formed between the superimposed tensioning bands.Once the clamping band is rolled up, wrapped around the pipe, and subjected to a clamping force, the overlapping sections of the clamping band press together. In the overlapping area, the clamping band prevents the clamp from opening, thus increasing the clamp's holding force. The clamping band forms a self-locking mechanism with itself. This allows the clamp's clamping unit to be advantageously smaller, as it only has to absorb a reduced holding force.

[0014] The holding force also increases automatically when the pipe is subjected to internal pressure. The internal pressure also acts on the tensioning band and consequently also in the at least one overlapping area. Since the tensioning band is made up of at least two layers in the overlapping area, a radially upper section of the tensioning band lies on a radially lower section of the tensioning band. The internal pressure presses the lower section in the overlapping area radially outwards against the upper section. The self-locking effect is thereby further increased. The fixing force required to prevent the tensioning band from opening when the pipe is subjected to internal pressure is consequently reduced, so that when the tensioning band is tensioned, the two ends can be fixed against each other using relatively few or simple means. This eliminates the need for strong threaded bolts.The entire tensioning strap can be secured with just one, or especially two, turnbuckles, such as a hose clamp. The tensioning process itself can also be performed using a removable tangential tensioner. The tangential tensioner is a tool used to tension the tensioning strap. The tangential tensioner can generate the clamping force required to tighten the tensioning strap, which is many times greater than the holding force. Once the tensioning strap is tensioned, the tensioning strap or both ends can be secured with at least one turnbuckle, and the tangential tensioner can be removed again.

[0015] The overlapping area is designed in such a way that when the tensioning band is closed or opened, i.e. when the circumference of the tensioning clamp is reduced or increased, the overlapping areas of the tensioning band shift against each other in opposite circumferential directions. In particular, the overlapping areas of the tensioning band in the overlapping area can shift against each other in the circumferential direction and will also shift against each other when the tensioning clamp is opened or closed. This differs, for example, from a two-layer band, in which the band is doubled to increase tensile strength, whereby an overlapping area is also formed there. Furthermore, a seamless application of tensioning force to the circular profile of 360° can be achieved.

[0016] It is advantageous if the at least one overlap region is arranged circumferentially adjacent to the recess and / or to the end passing through the recess. Additionally or alternatively, it is advantageous if the at least one overlap region is arranged circumferentially between the recess and the end passing through the recess.

[0017] It is advantageous if the tensioning strap is rolled up at least twice. When closed to form a tensioning clamp, the tensioning strap has at least two wraps. One wrap corresponds to a 360° wrap around the tensioning strap. A corresponding multiple wrap around, wrap around or loop around the tensioning strap corresponds to a corresponding multiple of 360°. The tensioning strap therefore has a correspondingly greater length between the first and second ends, so that the tensioning strap can also be wrapped around the pipe twice or wound up or rolled up to form a tensioning clamp. This can create a pulley effect. The tensioning force required to tighten the tensioning clamp is reduced, whereas the tensioning path through which the tensioning strap is tightened is correspondingly increased. The tensioning strap can also be rolled up at least three, four or five times, so that the pulley effect is correspondingly increased.The tensioning strap can also be rolled more than five times. The tensioning strap is provided with a recess or openings / cutouts so that multiple wraps can be made to increase the tensioning or holding force.

[0018] Each 360° grasp of the tensioning strap adds the tensioning travel according to the formula diameter x 3.14. Each 360° grasp increases the force on the tensioning or locking lock by a factor of +1.

[0019] For example, the holding force under internal pressure is approximately 10 times higher with a 3-fold grip compared to a 1-fold 360° grip.

[0020] Due to the multiple wraps, a high clamping force and an even higher holding force are achieved when clamping, for example using an external tool such as the removable tangential clamp.

[0021] It is advantageous if the tensioning strap is wound at least twice, especially three, four, or five times, in the circumferential direction. The tensioning strap thus has a corresponding number of windings and extends circumferentially around the clamp or pipe a corresponding number of times when the clamp is placed around the pipe. This also creates the pulley effect.

[0022] It is advantageous if the at least one overlap region is formed between at least one of the two ends and a region of the tensioning band arranged radially below it. A first end region can be arranged at the first end and a second end region at the second end. The overlap region is then arranged between at least one of the two end regions and the region of the tensioning band arranged radially below it. As a result, the at least one end and / or the at least one associated end region is pressed onto the region of the tensioning band arranged radially below it when the tensioning clamp is tensioned.

[0023] It is advantageous if at least one of the two ends rests flat on the tensioning band, particularly in the corresponding overlapping area. At least one end is thus oriented tangentially to the tensioning clamp and rests against the tensioning clamp or the tensioning band. As a result, the tensioning clamp rests closely against the pipe. This reduces the diameter of the tensioning clamp. Furthermore, the overlapping area is enlarged in the circumferential direction. In addition, the static friction of the overlapping area between at least one end or the end area of ​​the tensioning clamp assigned to the end and the area of ​​the tensioning clamp arranged below it in the radial direction is increased. The tensioning clamp therefore has a higher holding force when it is tensioned.

[0024] It is advantageous if, in at least one overlapping region, the radially superimposed regions of the tensioning band have the same orientation in the circumferential direction. The tensioning band is thus wound or rolled in only one of the two circumferential directions. The tensioning band has a single winding direction.

[0025] Additionally or alternatively, it is advantageous if the tensioning band is oriented only in one circumferential direction.

[0026] The tensioning strap therefore has only a single winding direction. The tensioning strap is therefore not folded. The tensioning strap therefore has no loops. The tensioning strap can be wound left- or right-handed.

[0027] The tensioning band extends over more than 720° in the circumferential direction. It is advantageous if the tensioning band extends over more than 1080° or 1440° in the circumferential direction. In the region of the at least one recess, the tensioning band is arranged in multiple layers, in particular at least two layers, three layers, or four layers, one above the other in the radial direction. It is also advantageous if the tensioning band is arranged in multiple layers, in particular at least two layers, three layers, or four layers, one above the other in the radial direction in the at least one overlapping region.

[0028] It is advantageous if the at least one overlapping region extends over at least 360° in the circumferential direction. Furthermore, the at least one overlapping region can also extend over at least 720°, 1080°, or 1440° in the circumferential direction. This increases the static friction between the regions of the tensioning band that overlap one another in the radial direction.

[0029] It is advantageous if the tensioning band has at least two overlapping areas, in particular separate and / or circumferentially spaced apart from one another. It is also advantageous if the first overlapping area is assigned to the first end and the second overlapping area to the second end. Furthermore, the tensioning band can also have multiple overlapping areas. This increases the static friction of the overlapping areas. As a result, the holding force of the tensioning clamp is increased when it is tensioned.

[0030] It is advantageous if the overlapping areas are spaced apart in the axial direction of the clamp. The axial direction of the clamp is parallel to the axial direction of the pipe when the clamp is arranged on the pipe.

[0031] Additionally or alternatively, it is advantageous if the overlapping areas are spaced apart in the circumferential direction of the clamp. The circumferential direction only becomes apparent once the clamping band is rolled up into the clamp.

[0032] Additionally or alternatively, it is advantageous if the overlapping areas are spaced apart in the radial direction of the clamp. The radial direction only becomes apparent once the clamping band is rolled up into the clamp.

[0033] It is advantageous if the sum of the angles of the overlapping areas in the circumferential direction is at least 360°, in particular 720°, 1080°, or 1440°. This also increases the static friction and thus the holding force of the clamp.

[0034] It is advantageous if the first end is arranged on the outer circumference of the clamp in the region or in at least a first overlap region. A further region of the clamping band is thus arranged below the first end or the first end region of the clamping band associated with the first end. The first overlap region is thus formed between the first end and / or the first end region and the clamping band arranged below it.

[0035] Additionally or alternatively, it is advantageous if the second end is arranged on the outer circumference of the tensioning clamp in the region or in at least one second overlap region. A further region of the tensioning band is thus arranged below the second end or the second end region of the tensioning band associated with the second end. The second overlap region is thus formed between the second end and / or the second end region and the tensioning band arranged below it.

[0036] It is advantageous if the first overlapping region is arranged adjacent to the first end and / or the second overlapping region is arranged adjacent to the second end.

[0037] It is also advantageous if the at least one recess is arranged in the circumferential direction between the two overlapping areas. If the tensioning band has multiple turns, it is advantageous if at least two recesses in the tensioning band, which are preferably formed in two different layers, are arranged in the circumferential direction between the two overlapping areas and / or at least partially overlap. This ensures that the end leading from the inside to the outside can be guided through multiple layers of the tensioning band.

[0038] It is advantageous if the tensioning strap has at least one simple overlapping area in which the tensioning strap lies on top of each other in two layers.

[0039] Additionally or alternatively, it is advantageous if the tensioning clamp has at least one double overlapping area in which the tensioning band lies on top of each other in three layers. This increases the static friction of the tensioning band with itself. This also increases the self-locking effect. As a result, the holding force of the tensioned tensioning band is increased. If the tensioning band lies on top of each other in three layers, the corresponding layers of the tensioning band shift in such a way that the middle layer of the tensioning band is shifted in the opposite direction to the layer of the tensioning band lying radially below and above it when the tensioning clamp is opened or closed. The static friction is thus formed between regions of the tensioning band that lie radially adjacent to one another.

[0040] Additionally or alternatively, it is advantageous if the tension clamp has at least one overlapping area in which the tension band is placed in multiple layers. This further increases the holding force.

[0041] It is advantageous if the clamping band has at least two recesses. The clamping band can also have more than two recesses. The recesses allow the clamping band to be guided radially from the inside to the outside.

[0042] It is advantageous if the at least two recesses for passing through the first end are arranged in the circumferential direction in such a way that they at least partially overlap in the radial direction.

[0043] Additionally or alternatively, it is advantageous if the recesses are arranged at a distance from one another in the axial direction of the tensioning band.

[0044] Additionally or alternatively, it is advantageous if the recesses are arranged at a distance from one another in the circumferential direction of the tensioning band.

[0045] It is advantageous if the tensioning strap has at least two recesses arranged circumferentially such that they at least partially overlap when the clamp is closed. This allows one of the two ends to be guided simultaneously through both recesses in a radial direction from the inside to the outside when the tensioning strap is rolled up.

[0046] It is advantageous if the tensioning strap has at least three recesses arranged equidistant from one another in the circumferential direction. This ensures that the recesses lie one above the other when the tensioning strap is rolled up, allowing the tensioning strap to be passed through the recesses. The three recesses overlap when the tensioning strap is rolled up.

[0047] It is advantageous if the tensioning strap has at least one first end recess associated with the first end. The first end recess is thus arranged in the first end region of the tensioning strap. Additionally or alternatively, the tensioning strap can have at least one second end recess associated with the second end. The second end recess is thus arranged in the second end region of the tensioning strap. When the tensioning strap is rolled up, the two end recesses can overlap in the radial direction. The end recesses are then each arranged in the corresponding other end recess.

[0048] Additionally or alternatively, at least one central recess can be arranged between the two ends. The tensioning strap has a central region, with the central recess being arranged in this central region.

[0049] It is advantageous if the at least one recess is closed over its circumference and / or the at least one recess is spaced apart from the long sides of the tensioning band and the end face of the tensioning band assigned to the recess, so that the recess is completely surrounded by the tensioning band. Each end face is assigned to each end of the tensioning band. For example, the at least one first end recess assigned to the first end and / or the second end recess assigned to the second end can be completely surrounded by the tensioning band. If the tensioning band is guided through the recess from the inside to the outside, the tensioning band completely encloses itself.

[0050] Additionally or alternatively, it is advantageous if the at least one recess has an opening along its circumference. The recess is therefore not completely closed along its circumference. It is also advantageous if the at least one recess is arranged on at least one longitudinal side of the tensioning strap, so that the corresponding recess is open on the at least one corresponding longitudinal side.

[0051] Additionally or alternatively, it is advantageous if the at least one recess is arranged on the associated end face of the tensioning strap, so that the corresponding recess on the end face is open. The recess can, for example, be the at least one first end recess associated with the first end and / or the second end recess associated with the second end. If at least one recess is arranged on at least one longitudinal side and / or on at least one end face, so that the recess is open there, the tensioning strap can be easily guided through the recess.

[0052] It is advantageous if at least one recess extends from a region of the associated end to beyond a center of the tensioning band in the circumferential direction. Furthermore, the recess can be longer in the circumferential direction than half the length of the tensioning band in the circumferential direction. This allows the tensioning band to be rolled up at least twice with such a recess.

[0053] It is advantageous if at least one recess overlaps itself at least once in the radial direction when the tensioning strap is rolled up, i.e., when the tensioning clamp is formed. This allows the tensioning strap or one end to be guided twice through the recess in the radial direction from the inside to the outside.

[0054] It is advantageous if the recesses are formed point-symmetrically to a center point of the clamping band. Additionally or alternatively, it is advantageous if the recesses are formed symmetrically to a center in the axial direction and / or in the circumferential direction of the clamping band.

[0055] It is advantageous if the tension clamp has a tensioning unit, in particular a tensile force unit, which connects the two ends of the tensioning band that face each other in the circumferential direction. The tensioning unit can be used to apply a tensioning force to the tensioning band, so that the tension clamp is tensioned. Furthermore, both ends can additionally or alternatively be subjected to the tensioning force using the tensioning unit, so that the ends can be pulled towards each other. The two ends are thus pulled together. Additionally or alternatively, the tensioned tensioning band can also be fixed using the tensioning unit. The tensioning unit is then a fixing unit. The tensioning unit can apply the holding force necessary to prevent the tensioning band from opening when the pipe is subjected to internal pressure.For example, the tensioning band can be fixed by means of the tensioning unit when the tensioning band is tensioned with the removable tangential tensioner or when the tensioning band is tensioned with the removable tangential tensioner.

[0056] Additionally or alternatively, it is advantageous if the clamping unit is arranged and / or configured such that, during intended use, the clamping unit and the clamping band can be subjected to a tensile force, in particular such that the two ends of the clamping band are pulled toward each other in the circumferential direction. The clamping unit is therefore subjected to tensile stress rather than compressive stress.

[0057] It is also advantageous if the clamping unit is arranged and / or configured in such a way that it pulls the two ends toward each other in the circumferential direction such that, during intended use, they rest against the outer circumference of the clamp. Additionally or alternatively, it is advantageous if the clamping unit has a connecting element that extends in the circumferential direction and / or rests against the outer circumference of the clamp and / or connects the two ends to each other.

[0058] The tensioning unit can, for example, comprise a tensioning element for tensioning the tensioning strap, in particular a turnbuckle and / or a tensioning screw, so that both ends are pulled toward each other. The tensioning unit can also comprise a connecting element that connects the two ends to each other.

[0059] Preferably, the connecting element is firmly fixed at one of its two ends to one of the two ends of the tensioning band. The other of the two ends of the connecting element corresponds to the tensioning element, which is fixed to the other end of the tensioning band.

[0060] In addition, the tensioning element can be arranged at one of the two ends of the tensioning band.

[0061] It is advantageous if the tension clamp has a locking mechanism by means of which the two ends can be locked together. With the help of the locking mechanism, the two ends can be fixed to one another when the tension clamp is tensioned. For example, one of the two ends has a serrated locking surface and the corresponding other end at least one locking element. The locking element can hook onto the locking surface so that loosening of the tension clamp can be prevented when it is tensioned. The locking element can also be spring-loaded so that secure engagement of the locking element with the locking surface can be achieved. With the help of the locking mechanism, the tension clamp can be fixed when it is tensioned with an external tool, for example the removable tangential tensioner. The locking surface and / or the at least one locking element can, for example, be arranged on at least one long side of the tensioning band.Additionally or alternatively, the locking surface and / or the at least one locking element can be arranged on the outer circumference and / or on an inner circumference of the tensioning strap. The locking surface and / or the at least one locking element are generally arranged such that the locking element faces the locking surface, so that the locking element can be brought into engagement with the locking surface.

[0062] According to the invention, the use of a tensioning band as the tensioning clamp is proposed.

[0063] The tensioning band can be rolled, wound, twisted, or rolled up to form the tensioning clamp.

[0064] Further advantages of the invention are described in the following exemplary embodiments. They show: Figure 1 a schematic plan view of a non-inventive, spread-out tensioning band for a tensioning clamp, Figure 2a perspective view of a schematic clamp not according to the invention, Figure 3 a plan view of the clamp not according to the invention, Figure 4 a perspective view of a schematic double coil clamp, Figure 5 a schematic plan view of an extended tensioning band for a tensioning clamp with several recesses, Figure 6 a schematic plan view of an extended tensioning band for a tensioning clamp with several recesses and Figure 7 a schematic plan view of an extended tensioning band for a tensioning clamp with several recesses.

[0065] Figure 1shows a schematic plan view of a non-inventive, spread-out tensioning band 2 for a tensioning clamp 1. With the help of the tensioning clamp 1, for example, a seal and / or a pipe coupling can be pressed onto a pipe and / or a line. The tensioning clamp 1 can also be a pipe clamp. By means of the tensioning clamp 1, for example, two pipes can be connected to one another. The tensioning band 2 is shown rolled out or flat here for the sake of clarity. When the tensioning band 2 is closed to form the tensioning clamp 1, the tensioning band 2 is wound up, twisted in on itself, rolled up and / or rolled up so that it can enclose the pipe in its circumferential direction. With the help of the aforementioned pipe coupling, two pipes can be connected to one another. In this case, a first section of the pipe coupling in the axial direction is pressed onto a pipe end of the first pipe using a first tensioning clamp 1.A second section of the pipe coupling in the axial direction is pressed onto one end of the second pipe using a second clamp 1. The pipe coupling then connects both pipes and also seals a transition between the two pipes.

[0066] The tensioning strap 2 further has a first end 3 and a second end 4 opposite thereto.

[0067] The tensioning band 2 or the tensioning clamp 1, when the tensioning band 2 is closed to form the tensioning clamp 1, has a circumferential direction U. The two ends 3, 4 are spaced apart from one another along the tensioning band 2 in the circumferential direction U. Furthermore, the tensioning band 2 or the tensioning clamp 1, when the tensioning band 2 is closed to form the tensioning clamp 1, has an axial direction A. The pipe extends in the axial direction A, for example, when the tensioning clamp 1 is placed around the pipe. Furthermore, the tensioning band 2 or the tensioning clamp 1 has a radial direction R. The radial direction R is oriented perpendicular to the circumferential direction U and to the axial direction A. In this exemplary embodiment, the radial direction R is perpendicular to the plane of the drawing. The radial direction R points into the plane of the drawing or emerges perpendicularly from it.

[0068] According to the present embodiment, the tensioning strap 2 is designed in the form of a band and / or strip.

[0069] The tensioning strap 2 also has a length L. The length L is advantageously dimensioned such that it can wrap around the pipe at least once. The length L can, for example, be between 30 cm and several meters, so that the tensioning clamp 1 can be placed around corresponding pipes. The two ends 3, 4 are also spaced apart according to the length L.

[0070] Furthermore, the tensioning band 2 has a width B. The tensioning band 2 has a tensile strength which is determined by the width B. The tensioning band 2 can also be made of metal and / or a fiber material, such as carbon, glass and / or ceramic fibers, wherein the tensile strength also depends on the material.

[0071] The tensioning strap 2 further has a first end face 5, which is arranged at the first end 3. Furthermore, the tensioning strap 2 has a second end face 6, which is arranged at the second end 4.

[0072] The tensioning strap 2 additionally has a first longitudinal side 7 and a second longitudinal side 8. The two longitudinal sides 7, 8 are spaced apart from each other according to the width B of the tensioning strap 2.

[0073] In addition, the tensioning strap 2 has a first end region 9, which faces the first end 3 and / or the first end face 5. Furthermore, the tensioning strap 2 has a second end region 10, which faces the second end 4 and / or the second end face 6. In addition, the tensioning strap 2 has a central region 11 arranged between the two end regions 9, 10. The central region 11 is arranged between the two ends 3, 4 and / or between the two end faces 5, 6.

[0074] The tensioning strap further comprises at least one recess 12, 13, 14. According to the present embodiment, the at least one recess 12, 13, 14 is associated with at least one of the two ends 3, 4. By means of the at least one recess 12, 13, 14, one of the two ends 3, 4 can be guided in a radial direction from the inside to the outside.

[0075] According to the present embodiment, a first recess 12 is assigned to the first end 3. The first recess 12 is arranged in the region of the first end 3 and / or in the first end region 9. The second end 4 can thus be guided through this first recess 12. The first recess 12 is thus a first end recess.

[0076] According to the present embodiment, the first recess 12 is spaced apart from both longitudinal sides 7, 8 and from the first end face 5. Consequently, the recess 12 is completely surrounded by the clamping band 2.

[0077] Additionally or alternatively, the present embodiment has a second recess 13, which is associated with the second end 4. The second recess 13 is arranged in the region of the second end 4.

[0078] Additionally or alternatively, the present embodiment has a third recess 14, which is associated with the second end 4. The third recess 14 is arranged in the region of the second end 4.

[0079] The second and / or third recesses 13, 14 are thus second end recesses, since they are assigned to the second end 4.

[0080] The second and third recesses 13, 14 shown here are arranged at a distance from the second end face 6.

[0081] Furthermore, according to the present embodiment, the second recess 13 and the third recess 14 are spaced apart from each other in the axial direction A. The second and third recesses 13, 14 are arranged in the same section in the circumferential direction U.

[0082] According to the present embodiment, the second recess 13 is arranged on the first longitudinal side 7. The second recess 13 is open on the first longitudinal side 7. Additionally or alternatively, the third recess 14 is arranged on the second longitudinal side 8. The third recess 14 is open on the second longitudinal side 8.

[0083] As a result of the two recesses 13, 14, which are offset from one another, in particular in the axial direction A, a taper 15 is formed. The taper 15 can be arranged in the first recess 12 when the tensioning band 2 is rolled up into the tensioning clamp 1.

[0084] Figure 2shows the tensioning band 2 not according to the invention, which is closed to form a tensioning clamp 1 not according to the invention. For this purpose, the tensioning band 2 is wound, twisted, rolled up and / or rolled up. The tensioning clamp 1 can thus be placed around a pipe. The tensioning clamp 1 has a passage 16 through which the pipe can be passed and in which the pipe is arranged when the tensioning clamp 1 is placed around the pipe. The tensioning band 2 encloses the passage 16. The tensioning band 2 can completely enclose the passage 16. The size of the passage 16 naturally depends on the length L of the tensioning band 2.

[0085] Furthermore, for the sake of simplicity, features and their effects that have already been described in the preceding figures will not be explained again. Furthermore, features that are identical or at least similar in effect to those in the preceding and / or subsequent figures have the same reference numerals. For example, for the sake of clarity, features may also be described in the following figures.

[0086] According to the present embodiment, the second end 4 is guided through the first recess 12 in the radial direction R of the clamp 1 from the inside to the outside. The two ends 3, 4 are thus arranged on an outer circumference 19 of the clamp 1. The two end faces 5, 6 of the respective ends 3, 4 thus face each other in the circumferential direction U.

[0087] The taper 15 formed by the two recesses 13, 14 is arranged in the region of the first recess 12. The taper 15 has a width in the axial direction A such that the taper 15 can be arranged in the first recess 12. When the tensioning band 2 is rolled up into the tensioning clamp 1, the three recesses 12, 13, 14 overlap at least partially in the circumferential direction U.

[0088] Furthermore, according to the present exemplary embodiment, the second and / or third recess 13, 14 shown here is spaced apart from the second end face 6. As a result, the tensioning band 2 has a widened portion 20 opposite the tapered portion 15. The widened portion 20 refers only to the tapered portion 15 adjacent in the circumferential direction U. The widened portion 20 has the width B of the tensioning band 2. The widened portion 20 has a greater width B than the first recess 12 in the axial direction A. As a result, the second end 4 can be prevented from slipping back inward through the first recess 12 in the radial direction R from the outer circumference 19.

[0089] When the second end 4 is guided through the first recess 12, the second end 4 is rotated with the widening 20 so that the widening 20 can be guided through the first recess 12.

[0090] Furthermore, the first recess 12 is completely surrounded by the tensioning band 2, so that the second end 4 is prevented from slipping out of the first recess 12.

[0091] Furthermore, the tensioning clamp 1 of the present embodiment has at least one overlapping region 17, 18 in which the tensioning band 2 lies one above the other in at least two layers in the radial direction R. The at least one overlapping region 17, 18 is a single overlapping region 17, 18 because the tensioning band 2 is two-layered and thus only overlaps once in this overlapping region 17, 18. By means of the at least one overlapping region 17, 18, static friction is formed between the superimposed regions of the tensioning band 2. A holding force of the tensioning band 2 can thereby be increased. This increases the holding force, in particular, when the tensioning clamp 1 is tensioned. A self-locking mechanism is formed by means of the at least one overlapping region 17, 18. In particular, the self-locking mechanism is further increased when the pipe on which the tensioning clamp 1 is arranged is subjected to internal pressure.As a result, in the overlapping area 17, 18, a lower section of the clamping band 2 in the radial direction R is pressed outward against a section of the clamping band 2 that is upper or above it in the radial direction R. The fixing force required to fix the two ends against each other when the pipe is subjected to internal pressure is thereby reduced. Consequently, the clamp 1 can be kept closed using relatively simple means.

[0092] The at least one overlap region 17, 18 extends in the circumferential direction U. According to the present embodiment, the at least one overlap region 17, 18 also extends in the axial direction A.

[0093] According to the present embodiment, the tensioning clamp 1 has two overlapping regions 17, 18. A first overlapping region 17 is formed between the first end 3 or a region at the first end 3 and / or the first end region 9 and the region of the tensioning band 2 lying below it in the radial direction R. A second overlapping region 18 is formed between the second end 4 or a region at the second end 4 and / or the second end region 10 and the region of the tensioning band 2 lying below it in the radial direction R. Both overlapping regions 17, 18 are spaced apart from one another in the circumferential direction U.

[0094] The at least one overlapping region 17, 18 is configured in such a way, or the tensioning band 2 is rolled, wound, looped, and / or rolled up into the tensioning clamp 1 in such a way that, in the overlapping region 17, 18, the superimposed regions of the tensioning band 2 have the same orientation. The tensioning band 2 is wound, rolled up, etc., only in one circumferential direction U. The tensioning band 2 has a single winding direction. The tensioning band 2 is loop-free.

[0095] According to the present exemplary embodiment, the tensioning clamp 1 has at least one tensioning unit 21 for tensioning the tensioning clamp 1. The two ends 3, 4 can be pulled towards one another by means of the tensioning unit 21. The tensioning unit 21 can thus apply a tensioning force, in particular a tensile force, to the tensioning band 2. The tensioning unit 21 is also subjected to tensile stress in the tensioned state. Additionally or alternatively, the tensioning clamp 1 can also be fixed in place with the tensioning unit 21. In particular, the two ends 3, 4 can be fixed against one another with the tensioning unit 21. This can prevent the tensioning clamp 1 from opening when the pipe is subjected to internal pressure. A fixing force can be exerted on the two ends 3, 4 with the aid of the tensioning unit 21. The tensioning unit 21 can therefore also be a fixing unit 21. If the tensioning clamp 1 or the fixing unit 21 is used toAfter the two ends 3, 4 are fixed, the clamp 1 can be tightened with an external tool, for example a tangential clamp, especially a removable one. The tangential clamp can be used to apply the clamping force to the clamping band 2.

[0096] According to the present embodiment, the clamping unit 21 has a clamping element 22 which is arranged at one of the two ends 3, 4. In Figure 2the clamping element 22 is arranged at the second end 4. The clamping unit 21 further comprises a connecting element 23. The connecting element 23 has a first connecting element end and a second connecting element end. The connecting element 23 connects the two ends 3, 4 of the clamping band 2 to one another. The connecting element 23 is fixed to one of the two ends 3, 4 - in this case to the first end 3. For this purpose, the first connecting element end is fixed to the first end 3 of the clamping band 2, in particular fastened in a form-fitting or material-fitting manner. The other The clamping element 22 can apply the clamping force to the connecting element 23, so that the two ends 3, 4 are pulled towards one another, whereby the clamping clamp 1 consequently tightens and presses onto the pipe. The clamping element 22 can also comprise, for example, a clamping screw, by means of which the clamping force can be applied to the connecting element 23.

[0097] According to the present exemplary embodiment, the tensioning band 2, when wound or rolled into the tensioning clamp 1, has only one winding direction. This means that the tensioning band 2 extends from the first, in particular free, end 3 in a single circumferential direction U to the second end 4. The tensioning band 2 has only a single orientation. The tensioning clamp 1 is a helix and / or a spiral. The tensioning band 2 is wound in a spiral shape.

[0098] According to the present embodiment, the tensioning band 2 extends by at least 360° in the circumferential direction U from the first end 3 to the second end 4. As a result, the at least one overlapping region 17, 18 is formed.

[0099] Figure 3 shows a plan view of the clamp 1 not according to the invention, as shown for example in Figure 2 is shown.

[0100] Furthermore, for the sake of simplicity, features and their effects that have already been described in the preceding figures will not be explained again. Furthermore, features that are identical or at least similar in effect to those in the preceding and / or subsequent figures have the same reference numerals. For example, for the sake of clarity, features may also be described in the following figures.

[0101] It can be seen that according to the present embodiment both ends 3, 4 are arranged on the outer circumference 19 of the clamp 1.

[0102] Figure 4 shows a perspective view of a schematic tensioning clamp 1 with at least two windings. According to the present embodiment, the tensioning band 2 is wound, rolled, or wound at least twice. The number of windings here is at least two.

[0103] Furthermore, for the sake of simplicity, features and their effects that have already been described in the preceding figures will not be explained again. Furthermore, features that are identical or at least similar in effect to those in the preceding and / or subsequent figures have the same reference numerals. For example, for the sake of clarity, features may also be described in the following figures.

[0104] The at least one overlapping region 17, 18, 24, 25 of the present exemplary embodiment of the tensioning clamp 1 extends completely in the circumferential direction U around the tensioning clamp 1. The overlapping region 17, 18, 24, 25 even extends at least once in the circumferential direction U around the tensioning clamp 1. The overlapping region 17, 18, 24, 25 of the present exemplary embodiment extends in the circumferential direction by more than 360°.

[0105] According to the present exemplary embodiment, the tensioning clamp 1 has the first and the second overlapping region 17, 18, which are designed as simple overlapping regions 17, 18. In simple overlapping regions 17, 18, the tensioning band 2 lies simply on top of one another, so that it has two layers. In addition, the tensioning clamp 1 has a third and a fourth overlapping region 24, 25, which are designed as double overlapping regions 24, 25. In the at least one double overlapping region 24, 25, the tensioning band 2 is arranged in three layers. The tensioning clamp 1 has two single and two double overlapping regions 17, 18, 24, 25, wherein in the circumferential direction U a double overlap region 17, 18, 24, 25 is arranged between two single overlapping regions and a single overlap region 17, 18, 24, 25 is arranged between two double overlapping regions. The single and double overlapping areas 17, 18, 24, 25 thus alternate in the circumferential direction U.

[0106] With the help of at least one double overlap area 24, 25, the static friction can be further increased when the clamp 1 is tensioned. The clamp 1 has a high degree of self-locking.

[0107] The first double overlap region 24 is arranged here in the region of the first end 3 and / or the first end region 9. The second double overlap region 25 is arranged here in the region of the second end 4 and / or the second end region 10.

[0108] If the tensioning band 2 is rolled up at least twice, i.e., it extends at least twice in the circumferential direction U, this also has an advantage. To tension the tensioning clamp 1, the two mutually facing ends 3, 4 are clamped with the aid of the tensioning unit 21 (not shown here) (cf. Figure 2) are pulled towards each other, a pulley effect is created by the tensioning band 2 being wrapped at least twice. Because the tensioning band 2 is wrapped twice, the two ends 3, 4 have to be pulled towards each other over a longer distance in order to press the tensioning clamp 1 onto the pipe than if the tensioning band 2 were only wrapped once. However, this has the advantage that a lower tensioning force is required. According to the relationship that work is equal to the product of force and distance, the force, which in this case is the tensioning force, decreases while the distance, which in this case is the tensioning distance, by which the two ends 3, 4 are pulled towards each other increases, whereby the work, which is the tensioning work, remains constant. The tensioning clamp 1 can therefore be tightened with a lower force, namely the tensioning force. The ends 3, 4, on the other hand, have to be pulled closer together.Of course, the clamp 1 can also be tightened with a constant clamping force. As a result, the pulley effect increases the clamp 1's contact force on the pipe.

[0109] This pulley effect can be further enhanced if the tensioning strap 2 is rolled, wound, looped, and / or wound up several times. The tensioning strap 2 then has a corresponding number of turns. For example, the tensioning strap 2 can be rolled, wound, looped, and / or wound up three, four, five, or six times. This can further reduce the tensioning force, making it easier to press the tensioning clamp 1 onto the pipe. Alternatively, the contact force of the tensioning clamp 1 on the pipe can also be increased.

[0110] This also has the further advantage that the tension clamp 1 has multiple overlapping areas 17, 18, 24, 25. If the tensioning band 2 is rolled up several times, multiple overlapping areas 17, 18, 24, 25 are formed, in which the tensioning band 2 lies on top of one another in multiple layers. The static friction of the overlapping areas of the tensioning band 2 in the overlapping areas 17, 18, 24, 25 is thereby multiplied, so that the tension clamp 1 has a high holding force when it is tensioned. Consequently, little holding force is required to hold the tension clamp 1 when it is tensioned.

[0111] In the tensioning band 2 that is rolled up, wound up, looped around and / or rolled up at least twice, at least one end 3, 4 is guided through at least one of the recesses 12, 13, 14, 26 in the radial direction from the inside to the outside to the outer circumference 19. In the present exemplary embodiment, the tensioning band 2 has a fourth recess 26, which is arranged here in the radial direction R below the first recess 12, so that the second end 4 is guided through the fourth recess 26 and the first recess 12. The second end 4 must traverse the tensioning band 2 twice in the radial direction R, since the tensioning band is rolled up, wound up, looped around and / or rolled up twice, or since the tensioning band 2 extends at least twice in the circumferential direction U. The fourth recess 26 is better in Figure 5 The first recess 12 and the fourth recess 26 overlap at least partially in the circumferential direction U.

[0112] If the tensioning band is rolled up, wound up, looped around and / or rolled up several times or if the tensioning band 2 extends several times in the circumferential direction U, one of the two ends 3, 4 must be guided a corresponding number of times through at least one recess 12, 13, 14, 26 through the tensioning band 2 in the radial direction R from the inside to the outside to the outer circumference 19 until both ends 3, 4 are arranged on the outer circumference 19.

[0113] Figure 5 shows a tensioning band 2 with several recesses 12, 13, 14, 26, which can be rolled up, wrapped around and / or rolled up at least twice.

[0114] Furthermore, for the sake of simplicity, features and their effects that have already been described in the preceding figures will not be explained again. Furthermore, features that are identical or at least similar in effect to those in the preceding and / or subsequent figures have the same reference numerals. For example, for the sake of clarity, features may also be described in the following figures.

[0115] The fourth recess 26 is arranged in the central region 11. For example, when rolling up the tensioning strap 2, the second end 4 is first guided through the fourth recess 26 the first time and then through the first recess 12 the second time, so that both ends 3, 4 are arranged on the outer circumference 19. In particular, when the tensioning strap 2 is rolled up, so that the tensioning clamp 1 is formed, the taper 15 is arranged in the region of the fourth and first recesses 26, 12. The fourth recess 26 is spaced from both longitudinal sides 7, 8 and from both end faces 5, 6, so that it is completely surrounded by the tensioning strap 2.

[0116] According to the present embodiment, the first recess 12, the fourth recess 26, and the pair of second and third recesses 13, 14 are arranged equidistant from one another in the circumferential direction U. The recesses 12, 13, 14, 26 overlap when the tensioning band 2 is rolled into the tensioning clamp 1, so that at least one end 3, 4 can be guided through the overlapping recesses 12, 13, 14, 26.

[0117] If the tensioning band 2 is to be rolled up, wound up, looped around and / or rolled up several times, at least one end 3, 4 must be guided through the tensioning band 2 from the inside to the outside in the radial direction R until both ends 3, 4 are located on the outer circumference 19. This can be achieved, for example, by the tensioning band 2 having a corresponding number of recesses 12, 13, 14, 26 in the circumferential direction U. The recesses 12, 13, 14, 26 are essentially spaced from one another in the circumferential direction U by a distance which is calculated from the diameter of the tensioning clamp formed therefrom 1 times the number Pi.

[0118] Figure 6shows a schematic plan view of an extended tensioning strap 2 with recesses 12, 13, 14. Furthermore, for the sake of simplicity, features and their effects already described in the preceding figures will not be explained again. Furthermore, compared to the preceding and / or subsequent figures, identical features or at least features with similar effects have the same reference numerals. For example, for the sake of clarity, features may also be described in the following figures.

[0119] According to the present exemplary embodiment, the first recess 12 extends from the first end region 9 into the central region 11 and, in particular, beyond the central region 11 in the direction of the second end 4. By means of such a first recess 12, the tensioning strap 2 can also be rolled up, wound up, looped around, and / or rolled up at least twice. The first recess 12 extends in the circumferential direction U beyond a center M. As a result, for example, the second end 4 can be guided twice through the first recess 12 from the inside to the outside.

[0120] According to the present embodiment, the clamping unit 21 has two clamping elements 22a, 22b and two connecting elements 23a, 23b.

[0121] Figure 7shows a schematic plan view of an extended tensioning strap 2 with recesses 12, 13, 14. Furthermore, for the sake of simplicity, features and their effects already described in the preceding figures will not be explained again. Furthermore, compared to the preceding and / or subsequent figures, identical features or at least features with similar effects have the same reference numerals. For example, for the sake of clarity, features may also be described in the following figures.

[0122] According to the present exemplary embodiment, the first recess 12 extends from the first end region 9 into the central region 11 and, in particular, beyond the central region 11 in the direction of the second end 4. The first recess 12 extends beyond the center M of the tensioning strap 2. By means of such a first recess 12, the tensioning strap 2 can also be rolled up, wound up, wrapped around, and / or rolled up at least twice. The first recess 12 extends up to the first end face 5, so that the first recess 12 is open at the first end face 5.

[0123] The present invention is not limited to the illustrated and described embodiments. Modifications within the scope of the patent claims are possible, as are combinations of features, even if they are illustrated and described in different embodiments. List of reference symbols

[0124] 1Clamp 2Clamping band 3First end 4Second end 5First end face 6Second end face 7First long side 8Second long side 9First end area 10Second end area 11Middle area 12First recess 13Second recess 14Third recess 15Taper 16Perforation 17First overlap area 18Second overlap area 19Outer circumference 20Wider section 21Clamping unit 22Clamping element 23Connecting element 24Third overlap area 25Fourth overlap area 26Fourth recess A Axial direction U Circumferential direction R Radial direction L Length B Width M Center

Claims

1. Clamp (1) with a clamping band (2), which has a first end (3), a second end (4) and at least one recess (12, 26), wherein one of the two ends (4) is led through the at least one recess (12, 26) in the radial direction (R) of the clamp (1) from the inside to the outside, so that both ends (3, 4) are arranged on the outer circumference (19) of the clamp (1), wherein the clamping band (2) has at least one overlapping area (17, 18, 24, 25) extending in the circumferential direction (U) of the clamp (1), in which the clamping band (2) lies at least in two layers on top of one another in the radial direction (R), wherein the at least two layers of the clamping band (2) lie against one another in the overlapping area (17, 18, 24, 25) in the radial direction in the intended use, wherein the clamping band (2) extends over more than 720° in the circumferential direction (U), characterized in that the clamping band (2) lies in several layers on top of one another in the radial direction (R) in the area of the at least one recess (12, 26) and the end (4) led from the inside to the outside is led through these several layers of the clamping band (2).

2. Clamp according to the preceding claim, characterized in that at least one of the two ends (3, 4) lies flat on the clamping band (2).

3. Clamp according to one or more of the preceding claims, characterized in that the clamping band (2) extends over more than 1080° or 1440° in the circumferential direction (U).

4. Clamp according to one or more of the preceding claims, characterized in that the clamping band (2) has at least two recesses (12, 26), which are arranged in the circumferential direction (U) for leading through the end (4) in such a way that they overlap at least partially in the radial direction (R).

5. Clamp according to one or more of the preceding claims, characterized in that the at least one recess (12, 26) is closed over its circumference and / or completely bordered by the clamping band (2) or the at least one recess (12, 26) has an opening on its circumference.

6. Clamp according to one or more of the preceding claims, characterized in that the at least one recess (12, 26) extends from an area of the assigned end (3, 4) to over a center (M) of the clamping band (2) in the circumferential direction (U) and / or that the at least one recess (12, 26) overlaps itself at least once in the radial direction (R) when the clamping band (2) is rolled in.

7. Clamp according to one or more of the preceding claims, characterized in that the clamp (1) has a clamping unit (21), in particular a tensile force unit, which connects the two ends (3, 4) of the clamping band (2) facing each other in the circumferential direction (U).

8. Clamp according to the preceding claim 7, characterized in that the clamping unit (21) has a connecting element (23), which extends in the circumferential direction (U) and / or lying on the outer circumference (19) of the clamp (1) and / or connects the two ends (3, 4) to each other.

9. Use of a clamping band (2) as a clamp (1) which has a first end (3), a second end (4) opposite thereto and at least one recess (12, 26), wherein, in the intended use, one of the two ends (3, 4) is led through the at least one recess (12, 26), wherein the clamp is formed as a result, characterized in that the clamping band (2) is used as a clamp (1) according to one or more of the preceding claims.