DE202012101587U1 - Clamp with hinge - Google Patents

Abstract

Clamp with two half shells (10, 12; 110, 112), the first ends (10A, 12A; 110A, 112A), which are each provided with an outwardly projecting clamping tab (14, 16; 114, 116), interact with one another, to ensure that the clamp is tightened, and the second ends (10B, 12B; 110B, 112B) of which cooperate via a hinge (20; 120), the second end (10B; 110B) of the first half shell (10; 110) has a first hook (22; 122) which projects outwards and which has a hooking recess (23) delimited by a holding edge (23A; 123A), while the second end (12B, 112B) of the second half shell (12 ; 112) has a second hook (24; 124) which is projecting outwards and which engages through the hooking recess of the first hook in order to be able to interact with the holding edge, characterized in that the second hook (24, 124) follows one after the other outdoor base (24A, 124A) is that the holding edge (23A, ...

Description

TECHNICAL FIELD OF THE INVENTION

The present invention relates to a clamp with two half-shells, the first ends, which are each provided with an outwardly projecting clamping tab, cooperate with each other to ensure the tightening of the clamp, and whose second ends cooperate via a hinge.

BACKGROUND OF THE INVENTION

In such known clamps, the half-shells may be integrally formed to form a continuous ring, and the hinge may be formed by a weakening region of this ring, which allows by bending this weakened area an articulated connection of the half shells to each other. However, the presence of such a weakened area affects the clamping performance. On the one hand, the clamping voltage with which the ring can be acted upon, inevitably limited to avoid damaging the weakened area. On the other hand, the weakened area is obtained by a material removal, which causes a significant interruption of the system of the ring on the one or more parts to be clamped. Further, in the case where the half shells have concave cross sections, they are inserted into the radially projecting abutment surfaces of the object to be clamped, the longitudinal cheeks formed by this concave cross section are interrupted in the region of the hinge, thus having no corresponding abutment with the aforementioned Areas takes place, which is detrimental to the quality of the clamping due to the length of the weakened area.

DISCLOSURE OF THE INVENTION

In the FR 2 761 452 the two half-shells are formed by separate parts, wherein the second end of one of the half-shells has a hook, while the other half-shell has an ear which is inserted into this hook. In this document, the two half shells are initially connected in the region of their first ends and are attached by spreading the second ends of these shells, then by connecting them by inserting the aforementioned ear into the hook on the object or items to be clamped. However, this attachment is relatively expensive, since the insertion of the ear in the hook is difficult to accomplish in place.

The invention prefers a solution in which the first ends of the half shells are spread apart by actuating the hinge for attaching the clamp around the object or objects to be clamped.

From the document US 5,018,768 a clamp of the aforementioned type is known in which for forming the hinge, the second end of the first half-shell has a first hook which is formed outwardly projecting and which has a retaining edge limited Einhakaussparung, while the second end of the second half-shell a second hook has, which is formed projecting outwardly and which passes through the Einhakaussparung of the first hook to cooperate with the retaining edge can.

This solution is advantageous in that it allows the two half-shells to be articulated relative to the hinge without the risk of inadvertently separating this hinge. However, the hinge forms a weakened area of the clamp. Because the tensile forces exerted during tightening of the clamp or after this tightening due to the expansion of the clamped article on the half-shells in the circumferential direction, engage the contact area between the outer surface of the retaining edge of the Einhakaussparung and the inner surface of the second hook, said hooking interaction, which counteracts the separation of the clamp under train, takes place between the second hook and the retaining edge, which according to this document forms the hinge axis of the hinge. However, in order to get into the Einhakaussparung, the second hook inevitably reduced compared to the width of the retaining edge of the Einhakaussparung width. Thus, the very large forces experienced by the hinge, when the clamp is tightened (under tension), are applied to an area of small width corresponding to the reduced width of the second hook.

Due to the development of materials and technical specifications, more and more clamping forces are involved. As a result, the application of the forces experienced by the hinge to a region whose width is reduced compared to that of the half-shells damages the overall mechanical strength of the clamp and can lead to fractures.

The aim of the invention is to overcome these disadvantages by combining the practical application of the hinge with increased mechanical strength.

Thus, the invention relates to a clamp with two half-shells, the first ends, which are each provided with an outwardly projecting clamping tab, cooperate with each other to ensure the tightening of the clamp, and whose second ends cooperate via a hinge, wherein for the formation of the hinge, the second end of the first half-shell has a first hook which is formed outwardly projecting and which has a limited by a retaining edge Einhakaussparung, while the second end of the second half-shell second hook which is formed projecting outwards and which engages through the Einhakaussparung of the first hook to cooperate with the retaining edge, characterized in that the second hook has an outwardly established base that the retaining edge of the first hook on the established Base of the second hook is hooked such that the tensile forces exerted due to the tightening of the clamp on the hinge tensile forces on the contact area between the retaining edge and the established base attack, and that the retaining edge and the erected base have substantially equal widths.

Thus, according to the invention, the first and the second hook, which are formed at the second ends of the first and the second half-shell, interlocked. In this range, the material thickness can remain analogous to that which exists in the continuous part of the half-shells, so that a considerable weakening is avoided. In addition, the hooks can engage tightly, so that they do not cause a significant interruption of the system of the ring of the clamp on the one or more objects to be clamped in the tightened state. Furthermore, the tensile forces on the hinge between the retaining edge of the first hook and the erected base of the second hook act on areas of substantially equal width. On the one hand, this allows a good distribution of tensile forces while avoiding excessive loading of a reduced width region, as in the prior art. On the other hand, this makes it possible to wedge the two half shells together well, while the clamp of the US 5,018,768 had to be equipped with an attached to the side of the second hook Andrückklammer. Furthermore, with the invention, the tensile forces act on the hinge at the base of the second hook, thus at a small distance from the outer diameter of the clamp, which maintains an optimal clamping as close as possible to the clamped object, while in the clamp of the US 5,018,768 these forces are displaced radially outwards.

Advantageously, the hooking recess is formed at the apex of the first hook.

The second hook is thus hooked over the apex of the first hook. This hooking is facilitated, and the proper attachment of the second hook to the first can be easily determined.

Advantageously, the base of the second hook and the retaining edge are inclined with respect to the radial direction in the direction inwardly toward the first end of the first half-shell.

When clamping the clamping voltage engages in the longitudinal direction of the ring formed by connecting the half shells clamp. This tension would of course aim to spread apart the second ends of the half-shells. However, thanks to the aforesaid inclination, the clamping tension actually aims to cause the retaining edge to slide radially inwardly at the base of the second hook, which ensures the cooperation between the first hook and the retaining edge. In other words, the larger the clamping force, the better the hooks engage each other.

In a first embodiment, the retaining edge is formed on the side of the free end of the first hook and the first hook on the base of the second hook is hooked under the second hook.

In this case, the two hooks facing in the same direction, the second hook on the side of the second half-shell from the first preceded.

In a second embodiment, the retaining edge is formed on the side of the first hook which faces away from the free end of the latter, and the first hook is hooked on the base of the second hook, on the rear side of the latter.

In this case, the two hooks are turned in the opposite direction, wherein the second hook on the side of the first half-shell from the first hook precedes.

The clamp is advantageously used for connecting two tubes whose opposite ends have contact surfaces which project from the cylindrical outer surface of the tubes. In this case, the half-shells have in their continuous parts concave cross-sections, the concavity turned inwards to accommodate the contact surfaces in its interior.

With such half-shells with concave cross-sections, it is advantageous that the base of at least one of the first and second hooks is connected to the side edges of the half-shell carrying it by connecting cheeks.

These connecting cheeks form reinforcements which prevent the bases of the hooks, by which these hooks are connected to the respective half-shells, from tending to flatten under the effect of the clamping stress. Preferably, the base of each of the two hooks on connecting cheeks and extend these cheeks in the tightened state of the clamp substantially parallel.

Advantageously, the outer periphery of one of the half-shells, where the free edge of one of the first and second hooks is located, a projection which forms a stop for the free edge.

This projection forming a stop consequently limits the opening of the second hook under the action of the clamping forces.

Further details and advantages of the invention will become apparent from the following purely exemplary and non-limiting description of an embodiment in conjunction with the drawings.

BRIEF DESCRIPTION OF THE DRAWING

1 shows a side view of a clamp according to a first embodiment of the invention in the tightened state.

2 shows in side view the clamp of 1 in open condition.

3 shows the clamp in the same situation as 2 , in perspective.

4 is a partial perspective view showing the hinge between the two half-shells in the tightened state of the clamp.

5 is a view analogous to 4 showing the hinge in the open state.

6 is a side view showing the clamp in vorgeclipstem state before tightening.

7 shows a side view of a clamp according to a variant, also in vorgeclipstem state.

8th shows the bell of the 7 in tightened condition.

9 is a side view showing a clamp according to a second embodiment.

10 is a view of the bell of the 9 in perspective.

11 is a partial perspective view along the arrow XI the 10 ,

DESCRIPTION OF PREFERRED EMBODIMENTS

First, the 1 to 3 described. The clip shown in these figures comprises a first half shell 10 and a second half shell 12 , The first end 10A the first half shell carries a first clamping strap 14 that protrudes outward. Likewise bears the first end 12A the second half shell 12 a second clamping strap 16 which also protrudes outwards. These tabs cooperate with each other to ensure the tightening of the clamp. In the present case, in which the 1 to 3 example shown, these tabs have holes (in 3 can be seen) on which the shaft 18A a screw 18 reaches through, whose head 18B on the tab 14 opposite side of the clamping plate 16 is held. This shaft 18A works with a mother 18C together, through the tab 14 on the tab 16 opposite side is held. This nut can be an attached part or by a threaded collar of the hole of the tab 14 be formed. It should be understood that a firm tightening of the screw or nut aims at the tabs 14 and 16 approach each other to tighten the clamp.

Throughout the continuation, it is considered that the outward direction is that which is away from the axis A of the clamp.

The second ends, 10B respectively. 12B the half shells act via a hinge 20 together. More precisely, the second end points 10B the first half shell 10 a first hook 22 on, which is formed projecting outwards. The second end 12B the second half shell 12 in turn has a second hook 24 on.

Like from the 4 and 5 can be seen better, the first hook 22 a hooking recess 23 on, the second hook 24 be upheld. This hooking recess 23 limits a retaining edge 23A , In the present case, the retaining edge runs 23A on both sides between the two side surfaces 23B and 23C the recess 23 , So you can see that the hooks are hooked into each other. More precisely, the retaining edge 23A that the nose or the free edge of the first hook 22 forms, at the base 24A the second hook 24 hooked, this base, in the example of the 1 to 5 , on the inside of the second hook 24 is located. In other words, the first catch is 22 at the base 24A of the second hook under this last hooked. It can be seen that this base on the outer periphery of the second half-shell 12 is set up slightly to the outside. In addition, it can be seen that the second hook 24 with the retaining edge 23A interacts. Even if the free Einhakrand 24B the second hook 24 in the tightened state of the clamp something of the retaining edge 23A is spaced, how 4 shows, it is understood that this retaining edge to unhook the second hook 24 counteracts the first. Especially when trying the second half shell 12 from the first half shell 10 in the in 5 In the indicated direction T, the hooking edge limits this removal and remains within the second hook 24 , Once the two hooks are hooked together, thus the hinge remains intact. In other words, the second ends of the half-shells can be separated only by complicated handles that require deformations of the hooks using a special tool.

The tensile forces due to the tightening of the clamp stress the half shells and tend to separate the second ends of the half shells from each other as indicated by the double arrow TR in 4 displayed, act between the inside of the retaining edge 23A of the first hook 22 and the outside of the set up base 24A the second hook 24 ,

As in 3 can be seen better, the half-shells in their continuous part concave cross-sections, the concavity is turned inwards.

Because the clamp is used in particular for connecting two pipes 1 and 2 whose opposite ends abutment surfaces 1A respectively. 2A have, which protrude from the cylindrical outer surface of these tubes. For their connection, the two tubes are butted against each other and is the clamp around the contact surfaces 1A and 2A that are inside the concavity of the half-shells 10 and 12 be picked up, arranged around. It can be seen that the base 22A of the first hook 22 that the free edge 22B This first hook is opposite, with the side edges 10 ' . 10 '' the first half shell 10 through first connecting cheeks 26 ' . 26 '' connected is.

Likewise is the base 24A the second hook 24 with the margins 12 ' respectively. 12 '' the second half shell 12 through second connecting cheeks 28 ' and 28 '' connected. The cheeks 26 ' and 26 '' form, viewed in the direction perpendicular to a plane passing through them radial plane, together a bracket that the hook 22 strengthened. Likewise, show the cheeks 28 and 28 '' Viewed perpendicular to a radial plane passing through it, also a bow shape, which reinforces the hook 24 in the region of its base. The connecting cheeks extend substantially parallel to the axis A of the clamp.

As in 1 can be seen, run in the tightened state of the clamp, the first connection cheeks 26 ' and 26 '' essentially parallel to the second connecting cheeks 28 ' and 28 '' , These cheeks are then arranged in pairs opposite each other. Thus, the distance D between the inner sides of these opposing cheeks is extremely small, as in 10 you can see. As a result, interruption of the abutment of the half shells against the objects to be clamped is negligible, in spite of the presence of the hinge, so that the effectiveness of clamping is improved as compared to the prior art clamps with integrated hinge. Advantageously, the connecting cheeks, like this 1 shows, substantially parallel to the radial direction R. The system interruption between the cheeks is at most of the same order of magnitude as that between the clamping plates 14 and 16 is present in the tightened state of the clamp.

As in the 4 and 5 is better to see is the Einhakaussparung 23 at the apex of the first hook 22 educated.

In addition, the established base 24A the second hook 24 and the retaining edge 23A passing through the hooking recess 23 is limited, relative to the radial direction R in the direction of the first end 10A inclined towards the inwardly extending direction of the first half-shell. This inclination α is advantageously between 30 ° and 70 °, preferably between 40 ° and 55 ° and is preferably close to 45 °. When the voltage is applied, the hooking edge of the first hook hooks more to the base of the second hook.

As can be seen in the figures, the hinge axis B of the hinge is offset from the opening plane of the half-shells. This axis is due to the contact between the edge of the first hook 22 and realized the base of the second hook when opening the clamp. In the manufacture of the hooks this makes it possible to dispose of a certain design freedom, the articulation of the dividing plane between the second ends of the half-shells, in the region of which - as stated above - is desirable that the distance between the second ends is minimized In order to limit the plant interruptions, is separate. The inner width I of the second hook 24 , tangential to the circumferential direction of the second half-shell 12 measured, is at least substantially equal to the height h of the retaining edge 23A , This allows a large angular deflection of the half shells. Because when opening the clamp, the retaining edge rotates in the second hook. It is also desirable that the length of the hooking recess 23 essentially of the same order of magnitude as the inner width of the first hook 22 is.

In the 1 to 5 is further seen that the outer periphery of the half-shell 12 on which the free edge 24B the second hook 24 is a lead 30 has, which forms a stop for this free edge. This stop can be realized by a projection of the second half-shell or by a cutting, that is by means of a hump whose one edge-the one which faces the free edge of the second hook-cut out. It can also be one opposite the half shell 12 erect tongue act. This projection makes it possible to limit the maximum position of the free edge of the hook in the direction of the first end of the second half-shell and thus to avoid the rolling up of this hook.

In the 1 to 6 is also apparent that the one of the clamping straps, in the present case, the tab 16 , a pre-clip hook 32 which is suitable with the other clamping tab, in the present case the tab 14 to work together to keep the clamp in a closed, unclamped condition. This situation is in 6 shown. To facilitate this previous Zuclipsen, the clamping strap 14 with a raised end section 34 Be provided with the hook 32 engages below. The hook 32 is deformable, and in 1 It can be seen that this hook in the tightened state of the clamp has deformed outwardly such that it has the desired approach of the clamping straps 14 and 16 allows.

It will be the 7 and 8th described, which show a variant embodiment. In this variant, the first and the second hook 22 and 24 identical with what has just been described and are at the second end 110B the first half shell 110 or at the second end 112B the second half shell 112 educated. This variant differs from the just described by the clamping means of the clamp. The one at the first end 110A the first half-shell formed clamping strap 114 Namely takes the form of a clamping ear 114 at which a clamping hook 118 hooked by the one at the first end 112A the second half shell 112 formed clamping strap 116 worn. This hook 118 Also serves as a pre-clip hook, like this one 7 it can be seen that shows that the Einhakrand 118A of the hook 118 at the erected end 115A a bib 115 that the ear 114 towards the first end 112A the second half shell 112 continues, is hooked.

In addition, in the 7 and 8th the hump or projection 130 which allows the rolling up of the second hook 24 to avoid being formed by a cutting.

With reference to the 9 to 11 Now, a second embodiment will be described.

In this second embodiment, the half shells 10 and 12 analogous to those of 1 to 6 , The second embodiment differs from the first, which with reference to the 1 to 6 is described by the reverse execution of the hook, which is the hinge 120 form. Furthermore, this is immaterial, however, is the position of the screw 18 conversely, taking her head 18A with the tab 14 interacts while the tab 16 has an integrated mother. The pre-clip hook 32 is in turn from the tab 14 worn and hooked on the erected end of the tab 16 , In this embodiment, the first hook 122 that at the second end 10B the first half shell 10 is formed, analogous to the hook 22 of the 1 to 6 in particular in that it has a hooking recess located in the region of its apex 123 having its base at the second end 10B the first half shell by connecting cheeks 26 ' and 26 '' is connected and that he has a retaining edge located on the side of his free end 123A having.

The second hook 124 that at the second end 12B the second half shell 12 is formed, is the second hook 24 of the 1 to 6 vice versa. He is on the first hook 22 turned away side. So this second hook goes through 124 the hooking recess 123 and works with an auxiliary holder edge 123A ' together, through the hooking recess 123 limited and on the side of the base 122A of the first hook is formed. In other words, this retaining edge is 123A ' on the side of the first hook 122 that from the free end 122B turned away from this first hook formed. The first catch 122 is at the established base 124A the second hook 124 , hooked to its back, that is, on the side of this base, that of the free edge 124B the second hook is turned away. In contrast to the previous embodiment, therefore, the first hook 122 this embodiment, two retaining edges, a free retaining edge 123A over which the first hook hooked on the base of the second or a Hilfshalterand 123A ' , which is the free edge of the second hook 124 can hold.

How out 11 It is better to see the width of the established base 124A and those of the hooking edge 123A ' the first hook substantially equal to each other and substantially equal to the width of the continuous half-shell parts.

In the 9 and 10 it can be seen that the outer circumference of the first half-shell 10 a first advantage 131 having a stop for the free edge 124B the second hook 124 forms, which counteracts the rolling of the latter. This stop is formed in the present case by cutting, but it could also be formed by a simple hump.

Likewise, the outer periphery of the second half-shell 12 a second projection 132 on, a stop for the free edge 122B the second hook 122 forms, which counteracts the rolling of the latter.

Otherwise, this embodiment is analogous to that of 1 to 6 , in particular as regards the dimensional characteristics of the interiors of the hooks and hooking recess and the presence of the connecting cheeks.

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• FR 2761452 [0003]
• US 5018768 [0005, 0010, 0010]

Claims (12)

Clamp with two half shells ( 10 . 12 ; 110 . 112 ) whose first ends ( 10A . 12A ; 110A . 112A ), each with an outwardly projecting clamping tab ( 14 . 16 ; 114 . 116 ) cooperate with each other to ensure the tightening of the clamp, and whose second ends ( 10B . 12B ; 110B . 112B ) via a hinge ( 20 ; 120 ), wherein for the formation of the hinge, the second end ( 10B ; 110B ) of the first half shell ( 10 ; 110 ) a first hook ( 22 ; 122 ), which is formed projecting outwards and the one by a retaining edge ( 23A ; 123A ) limited hooking recess ( 23 ), while the second end ( 12B . 112B ) of the second half shell ( 12 ; 112 ) a second hook ( 24 ; 124 ) which projects outwardly and engages through the hooking recess of the first hook in order to be able to interact with the retaining edge, characterized in that the second hook ( 24 . 124 ) an externally established base ( 24A . 124A ), that the retaining edge ( 23A . 123A ) of the first hook is hooked to the erected base of the second hook such that the tensile forces exerted on the hinge due to the tightening of the clamp engage the contact area between the retaining rim and the raised base; 23A . 123A ) and the established base ( 24A . 124A ) have substantially equal widths Clamp according to claim 1, characterized in that the hooking recess ( 23 ) at the apex of the first hook ( 22 ; 122 ) is trained. Clamp according to claim 1 or 2, characterized in that the base ( 24A ) of the second hook ( 24 ) and the retaining edge ( 23A ) relative to the radial direction in the direction to the first end ( 10A ; 110A ) of the first half shell ( 10 ; 110 ) are inclined inwardly towards the direction. Clamp according to one of claims 1 to 3, characterized in that the retaining edge ( 23A ) on the side of the free end ( 22B ) of the first hook ( 22 ) and that the first hook on the base ( 24A ) of the second hook ( 24 ), hooked under the second hook. Clamp according to one of claims 1 to 3, characterized in that the retaining edge ( 123A ' ) on the side of the first hook ( 122 ) formed by the free end ( 122B ) of the latter and that the first hook ( 122 ) at the base ( 124A ) of the second hook ( 124 ), hooked on the back of the latter. Clamp according to one of claims 1 to 5, characterized in that, when the clamp for connection of two pipes ( 1 . 2 ), whose opposite ends abutment surfaces ( 1A . 2A ) projecting from the cylindrical outer surface of the tubes, the half-shells ( 10 . 12 ; 110 . 112 ) have in their continuous parts concave cross-sections, the concavity facing inwards, and that the base ( 22A ; 122A ) of the first hook ( 22 ; 122 ) with the margins ( 10 ' . 10 '' ) of the first half shell ( 10 ; 110 ) by first connecting cheeks ( 26 ' . 26 '' ) connected is. Clamp according to one of claims 1 to 6, characterized in that when the clamp for connecting two pipes ( 1 . 2 ), whose opposite ends abutment surfaces ( 1A . 2A ) projecting from the cylindrical outer surface of the tubes, the half-shells ( 10 . 12 ; 110 . 112 ) have in their continuous parts concave cross-sections, the concavity facing inwards, and that the base ( 24A ; 124A ) of the second hook ( 24 ; 124 ) with the margins ( 12 ' . 12 '' ) of the second half shell ( 12 ; 112 ) by second connecting cheeks ( 28 ' . 28 '' ) connected is. Clamp according to claims 6 and 7, characterized in that the first and second connecting cheeks ( 26 ' . 26 ''; 28 ' . 28 '' ) in the tightened state of the clamp are substantially parallel, wherein they are preferably substantially parallel to the radial direction (R). Clamp according to one of claims 1 to 8, characterized in that the hinge axis (B) of the hinge ( 20 ; 120 ) with respect to the opening plane of the half-shells ( 10 . 12 ; 110 . 112 ) is offset. Clamp according to one of claims 1 to 9, characterized in that the inner width (I) of the second hook ( 24 ; 124 ), tangential to the circumferential direction of the second half-shell ( 12 ; 112 ), at least substantially equal to the height (h) of the retaining edge ( 23A ; 123A ). Clamp according to one of claims 1 to 10, characterized in that the outer circumference of one of the half-shells ( 10 . 12 ; 110 . 112 ), where the free edge ( 24B ; 124B ) of one of the first and second hooks ( 22 . 24 ; 122 . 124 ), a projection ( 30 . 130 ; 131 . 132 ), which forms a stop for the free edge. Clamp according to one of claims 1 to 11, characterized in that the one of the clamping straps ( 14 . 16 ) a pre-clip hook ( 32 ) which is adapted to cooperate with the other clamping tab to hold the clamp in a closed, not tightened state.

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