DE8803178U1 - Connection clamp for several hoses, especially for autogenous welding machines - Google Patents

Description

Siegfried Biernath

S30Ö Bonn 1

DESCRIPTION

The invention relates to a connecting clamp for several hoses, in particular for autogenous welding devices.

On stationary and portable autogenous welding machines, flexible lines are required between the welding machine and the welding torch, e.g. in workshops, on construction sites and shipyards, so that the welding torch can be brought quickly and easily to the respective welding point of the component or part to be repaired. For safety reasons, this is done using individual hoses for fuel gas and for oxygen.

In order to facilitate the frequent unwinding and winding of the hoses before and after welding, and to arrange the hoses next to each other, connection clamps are placed at a certain distance to hold them together.

When using a known connecting clamp made of a stamped flat profile, it has been shown that the angular and bulky external shape has a disruptive effect on the workflow if the clamp gets caught on body edges and solid angles when tightening the hose. This also causes the clamp halves to twist around the central clamping screw, come loose from the hose and get lost.

Another known clamp eliminates the latter disadvantage by "interlocking" the ends of the bracket, which prevents the clamp halves from rotating against each other. However, this clamp, especially since it is made of plastic, is even larger in cross-section and therefore even more bulky than the clamp mentioned above.

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Siegfried Biarnath
Bonne 1

Handling hoses with connecting clamps of the type described above also has a disadvantageous effect when rolling them up, as these act as an obstacle when pulling the hose through your hand. Injuries to the person handling them due to sharp edges of the clamp or the clamping screw cannot be ruled out.

The aim is to design a clamp so that it is a reliable and handy work tool that essentially avoids the disruptive influence of bulkiness, failure and injuries and also ensures sufficient durability.

The solution to the problem is achieved according to the invention in that the cross section of the new one-piece connecting clamp is extremely small while the clamping effect of the brackets is sufficient. This is made possible by the arrow-shaped limitation of the bracket edges and the resulting triangular shape of the bracket halves towards the bracket end, so that in conjunction with a uniform and low wall thickness of the brackets, a profile with a decreasing cross-sectional area is designed. This profile has the property of a bending beam with almost the same bending stress when clamping the hoses and means a high degree of material utilization.

The arrow-shaped edges also help to solve the problem, preventing the clamp from sticking to sharp objects and corners and also improving handling. In the one-piece clamp with a bridge between the hoses or between the lower and upper bracket, two bracket edges merge into a bridge end, which forms a "tip" of the clamp.

Siegfried Biernath
S300 Bonn1

This rounded tip lies concealed between the two tubes without providing a point of reference for angular bodies when pulling it along.

The one-piece design of the clamps prevents the lower and upper brackets from becoming accidentally separated. This is achieved on the one hand by a web between the brackets and on the other hand by a silicone connection at the ends of the bracket on one side, which prevents the clamp from twisting and prevents it from becoming lost from the hoses.

The ends of the brackets of the one-piece clamps are open enough so that the hose can be easily inserted. When assembling the clamp, the lower and upper brackets are pressed together and the inserted hoses are clamped accordingly. The shell-like brackets preformed during the manufacturing process largely correspond to the outer curve of the hose on the inner wall. Only in the area (k) between the web and the upper or lower bracket curve is a slightly larger curve specified, which only acquires the same curvature as the web side (10) or as the rest of the bracket part towards the end of the bracket during assembly (e.g. by pressing together in a vice).

In the following, the features of the invention are described with reference to the drawings, which illustrate embodiments of the invention.

Fig. 1 shows the one-piece embodiment of a double-sided

open connection clamp with a web in the profile. Fig. 2 shows the clamp according to Fig. 1 with inserted hoses in assembled form in cross section according to line A-B in Fig. 3.

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Siegfried Biernath

5300 Bonn 1

§ Fig. 3 shows the clamp according to Pig. 2 in a top view with 2we1 mounted hoses.

Mg. 4 shows the clamp according to Mg. 3 1n the side view

in assembled condition with only one inserted hose next to an angular body.

' The clamp 3 shown in Fig. 1 to 4, preferably made of a metallic material, can be conveniently made from a profile bar that corresponds to the profile according to Fig. 1 in the open state. The arrow-shaped edges 6 are produced by cutting the profile 1 at a suitable angle α. The cut edges are rounded in order to avoid

; to avoid injuries to the hose 1, 2 and the operator. It is advantageous to press the one-piece clamp 3

Ii 15 sen or casting in one operation. The web 8

connects the lower and upper bracket 4 of the clamp 3 and is slightly thicker than the thickness of the bracket. Fig. 4 also shows the direction of movement of the hoses 1, 2 and the clamp 3, relative to the angular body 11 and the deflection effect achieved by the slanted edges 6.

Fig. 5 shows a fully bent and assembled connecting clamp in the front view with two hoses and a countersunk screw.

% 25 Fig. 6 shows the clamp according to Fig. 5 in plan view with

inserted tubes next to an angular body.

Fig. 5 shows an example of the design of the clamp 13, in which the clamping effect is achieved by the countersunk screw 18. The clamp, which is preferably made of sheet metal, is bent in such a way that an 8-shaped profile is created. The advantage of this design as a stamped and bow part is that the narrow connecting area 20 between the lower and upper bracket 14 prevents these two parts from twisting unless only one clamping screw is used.

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Siegfried Biernath
Bonne 1

The head of the countersunk screw 18 is embedded in the longitudinal groove of the clamp so that it does not cause any obstruction.

The example in Fig. 6 shows the clamp 13 with hoses 1 and 2 inserted. The illustration shows in principle the repelling effect of the arrowed edges 16 when the clamp is pulled past the body edges 21. This applies to the entire circumference of the clamp.

The following advantages apply to connecting terminals of the type according to the invention:

1. The cross-section of the terminals is two thirds

less than conventional clamps, which has a positive effect on the handling of the hoses due to the reduced bulkiness.

2. The clamps are reusable, e.g. after the hoses have worn out.

3. Greater safety when handling the hoses

4. No breakage when using metal clamps compared to plastic clamps, especially at low temperatures

Overall, the innovative design of the clamp provides a reliable tool that eliminates the disruptive effects of bulkiness, failure and injuries.

In addition to the open clamps of the type described above, a one-piece closed, 1m cross-section, approximately oval connecting clamp can also be used, which is threaded onto both hoses and then pressed together in an 8-shape.

Claims (9)

Siegfried Biernath Bonn, 08.03.1988 Oppenhoffstraße 12 Bonn 1 connecting clamp for several hoses, especially for autogenous welding machines. PROTECTION CLAIM 1. Connection clamp for several hoses, especially for autogenous welding machines, •^characterized in that the shell-like brackets (4,14) which enclose the hose (1,2) are connected to one another to form a one-piece clamp (3,13). 2. Clamp according to claim 1, characterized in that the brackets (4,14) with edges (6.16) which, in pairs, form an arrow-like boundary with the angle cc pointing in the longitudinal direction of the tubes (1,2). 3. Clamp according to claim 1 and 2, characterized in that two edges (6,K) of the lower and upper bracket (4,14) in a rounded tip (7.17) and immerse themselves in the longitudinal groove between the hoses. 4. Clamp according to claim 1 to 3, characterized in that the brackets (4,14) taper off to the right and left of the longitudinal center towards the end of the bracket (5,15) and therefore have an approximately rectangular shape when unfolded. 5. Clamp according to one of the preceding claims, characterized in that the brackets (4,14) have a relatively thin, uniform wall thickness. Ii Mil tit * t I l Ml ■ -2- Siegfried Biernath
Bonne 1 6. Clamp according to one of the preceding claims, characterized in that the brackets (4) of the clamp (3) are connected by a web (8) arranged between the hoses (1, 2), the height of which corresponds approximately to the diameter of the hoses and whose web ends (9) are merge into the edges (6) of the brackets (4) running in here, so that a clamp that is open on both sides is created. 7. Clamp according to one of the preceding claims, characterized in that the lower and upper brackets (14) are connected to one another at two adjacent bracket ends (15) to form a clamp (13) that is open on one side, this connection serving as a torsion lock between the lower and upper brackets, and that the clamping effect is achieved by a centrally arranged screw (18) between the hoses (1, 2) 8. Clamp according to one of the preceding claims, characterized in that the bracket ends (5,15) of the clamp (3,13) are sufficiently open to insert the hoses, and that the clamp receives its final shape or clamping effect through plastic or elastic deformation in certain areas during assembly. 9. Clamp according to one of the preceding claims, characterized in that, in connection with the triangular shape of the right and left bracket halves and their uniform wall thickness, the cross-sectional area of the brackets (4, 14) decreases towards the bracket end (5, 15), whereby the open brackets are equipped with the property of a "bending beam with equal bending stress".