CLAMP WITH INDENTATIONS IN AN INSERT

Abstract

The invention is based on a tensioning clamp (10) with a tensioning band (12), two tensioning elements (14a, 14b), a pulling element (16) and an insert (18), wherein the tensioning band (12) comprises two ends which are each folded over to form a loop. Each of the loops (20a, 20b) receives a tensioning element and has openings (24, 26). The pulling element (16) connects the tensioning elements (14a, 14b) through the openings (24, 26) of the loops (20a, 20b) and transmits a pulling force applied to tension the tensioning clamp (10). The insert (18) is arranged in a circumferential region of the loops (20a, 20b) between the tensioning band (12) and a binding material, and has a profile with at least two radially inwardly projecting ribs (30a, 30b) extending in the circumferential direction of the tensioning band (10) and a trough (32) formed between the ribs (30a, 30b). A rear side of the insert (18) facing the tensioning belt (12) in the region of the trough (32) forms a support surface (34) for the setting material.

It is proposed that the support surface (34) has at least one recess (40a, 40b) in a circumferential region lying below the tensioning elements (14a, 14b).

Claims

1. A tensioning clamp, comprising: a tensioning band (12), two tensioning elements (14a, 14b), a pulling element (16) and an insert (18), wherein the tensioning band (12) comprises two ends which are each folded over to form a loop (20a, 20b), wherein each of the loops (20a, 20b) receives one of the tensioning elements (14a, 14b) and has openings, the pulling element (16) connects the tensioning elements (14a, 14b) through the openings of the loops (20a, 20b), the pulling element (16) transmits a pulling force applied for tensioning the tensioning clamp 10 and pulls the tensioning elements (14a, 14b) towards each other, the insert (18) is arranged in a circumferential region of the loops (20a, 20b) between the tensioning band (12) and a material to be clamped, and the insert (18) has a profile with at least two radially inwardly projecting ribs (30a, 30b) running in the circumferential direction of the tensioning clamp (10) and a depression (32) formed between the ribs (30a, 30b), the rear side of said depression (32) facing the tensioning band (12) forming a bearing surface (34) for the material to be clamped; wherein the support surface (34) has at least one depression (40a, 40b) in a circumferential region lying below the tensioning elements (14a, 14b).

2. The tensioning clamp of claim 1, wherein the supporting surface (34) has two depressions (40a, 40b), each of which being provided below one of the clamping elements (14a, 14b).

3. The tensioning clamp of claim 1, wherein the insert (18) has at least one projection (42a, 42b) which engages in an opening in the tensioning band (12) in order to fix the position of the insert (18) in relation to the tensioning band (12) in the circumferential direction.

4. The tensioning clamp of claim 3, wherein the opening in the tensioning band (12) is provided on an inner leg of at least one of the loops (20a, 20b).

5. The tensioning clamp of claim 1, wherein the tensioning band (12) has, at least in a circumferential region outside the loops (20a, 20b), a profile with two ribs (30a, 30b) projecting radially inwards and a depression (32) formed be-tween the ribs (30a, 30b).

6. The tensioning clamp of claim 5, wherein the insert (18) has at least at one end an extension (44a, 44b) which has a reduced width compared to the rest of the insert (18) and can be placed in the depression (32) between the ribs (30a, 30b) of the tensioning band (12).

7. The tensioning clamp of claim 6, wherein the extension (44a, 44b) is offset radially outwardly relative to the bearing surface (34).

8. The tensioning clamp of claim 1, wherein the insert (18) comprises radially projecting walls at both axial edges for receiving the tensioning band (12).

Description

[0021] In this regard, the following is shown:

[0022] FIG. 1 illustrates a tension clamp according to a first embodiment of the invention in a perspective view;

[0023] FIG. 2 shows the clamp from FIG. 1 in a radial section;

[0024] FIG. 3 illustrates an insert of the tension clamp from FIGS. 1 and 2 in a view from the radially inner side; and

[0025] FIG. 4 illustrates the insert from FIG. 3 in a view from the radially outer side.

[0026] FIG. 1 shows a tensioning clamp according to a first embodiment of the invention in a perspective view.

[0027] The tensioning clamp 10 comprises a tensioning band 12, two tensioning elements 14a, 14b, a pulling element 16 in the form of a tension screw, and an insert.

[0028] Two ends of the tensioning band 12 are each folded over to form a loop, wherein legs of the loops 20a, 20b are folded over inwardly. The outer leg of each of the loops 20a, 20b includes press cuts 22 or openings, into which fastening tabs or hooks 23 (FIG. 2) cut free from the inner leg of the loops 20a, 20b of the tensioning band 12 engage.

[0029] Each of the loops 20a, 20b receives one of the tensioning elements 14a, 14b and has a punched opening 24, 26 on its end face in the circumferential direction and in the outer leg. The tensioning screw 16 connects the tensioning elements 14a, 14b through the openings of the loops 20a, 20b and transmits a tensile force applied for tensioning the tensioning clamp 10 and thus pulls the tensioning elements 14a, 14b towards each other so that the circumference of the tensioning clamp 10 is reduced and a radially acting contact force is exerted on the tying material (not shown).

[0030] The insert 18 of the tensioning clamp 10 is made of a steel sheet and is arranged in particular in the circumferential region of the loops 20a, 20b between the tensioning band 12 and the material to be clamped, so that the loops 20a, 20b rest on the insert 18 and do not come into direct contact with the material to be clamped. In the embodiment shown in FIG. 1, the length of the insert 18 extends over half the circumference of the clamp 10.

[0031] The insert 18 has a profile with two radially inwardly projecting ribs 30a, 30b running in the circumferential direction of the tensioning clamp 10 and a depression 32 formed between the ribs 30a, 30b, i.e. a W-profile. The rear side of the depression 32 facing the tensioning band 12 forms a bearing surface 34 for the tensioning band 12. The spring action of the W-profile ensures a high degree of tightness over a very wide temperature range.

[0032] Like the insert 18, the tensioning band 12 also has a profile in a circumferential region not covered by the insert 18, with two ribs 36a, 36b projecting radially inwards and a depression 38 formed between the ribs 36a, 36b.

[0033] FIG. 2 shows the tensioning clamp 10 of FIG. 1 in a radial section, FIG. 3 shows the insert 18 of the tensioning clamp 10 of FIGS. 1 and 2 in a view from the radially inner side, and FIG. 4 shows the insert 18 of FIG. 3 in a view from the radially outer side.

[0034] The support surface 34 has two depressions 40a, 40b which, in the assembled state of the insert 18, are arranged in a circumferential region lying below the clamping elements 14a, 14b. The depth of the depressions 40a, 40b is sufficient to ensure that the area of the tensioning band 12 lying immediately below the tensioning elements 14a, 14b does not touch the bottom of the depressions 40a, 40b (FIG. 2) and that the force is distributed more evenly over other areas of the tensioning band 12.

[0035] Since the insert 18 is made of sheet steel, as shown in FIG. 3, the depressions 40a, 40b in the radially outer bearing surface 34 can be seen as dents on the radially inner side of the insert 18 facing the material to be clamped.

[0036] The insert 18 has two projections 42a, 42b which are provided as free-cut tabs. The projections 42a, 42b form latching springs which engage in an opening in the tensioning band 12. The insert 18 can thus be engaged with the opening in the tensioning band 12. This can enable transport securing and the position of the insert 18 can be fixed in relation to the tensioning band 12 in the circumferential direction. The opening in the tensioning band 12 is formed on an inner leg of one of the loops 20a, 20b.

[0037] The insert 18 has an extension 44a, 44b at both ends which has a reduced width relative to the remainder of the insert 18 and can be placed in the depression 38 between the ribs 36a, 36b of the tensioning band 12. The extension 44a, 44b is offset radially outwardly relative to the bearing surface 34 so that when the tensioning clamp 10 is tightened, the free end of the insert 18 is guided circumferentially in the depression 38 of the tensioning clamp 10.