DE102007043292A1 - Pipe clamp comprises has tensioning screw with number of screw heads arranged in series in longitudinal direction of screw and of which one acts upon clamping ring when pipe clamp is closed - Google Patents

Abstract

The pipe clamp comprises a clamping ring (10) which is tightened down by a tensioning screw (1) which has a number of screw heads (4) which are arranged in series in the longitudinal direction of the tensioning screw and of which one acts upon the clamping ring when the pipe clamp (7) is closed. The clamping ring has a fastening flange (14) with a slot (21) open at one end, and when the pipe clamp is closed the tensioning screw passes through the slot and one of the screw heads fits behind the fastening flange. An independent claim is included for a screw with a number of screw heads which are arranged in series in the longitudinal direction of the screw.

Description

The The invention relates to a pipe clamp with the features of the preamble of claim 1.

clamps are known per se. They have a clamp ring, the one engages in the pipe clamp inserted tube and the one opening has at a point of its circumference, through which the pipe in the Clamp is inserted. The opening is with a clamping screw closable, with the pipe clamp or the clamp ring is clamped around the tube. Of course, in the clamp ring not only a tube insertable, but also other, preferably rod-shaped components. The clamp ring needs not circular, but it is mostly. Another Common name for the clamp ring is clamp body.

at known clamps, the clamp ring has two clamp strap in each case over a little less than 180 ° in Extend circumferential direction. It is known the two clamps at both ends to connect with clamping screws and zusammenzuspannen. Also, the two clamp brackets at one End articulated to each other, for example, interlocked, and on the other side clamped together by a clamping screw be. Basically, the clamp ring can also be made of more consist of two parts or only one part. A one-piece Clamp ring is preferable for opening and closing elastic, possibly also plastic, deformable, or he is limp.

To be able to close the clamp without tools and simply by hand, the patent proposes EP 0 975 908 B1 to loosely thread the turnbuckle into a threaded member that is pivotally connected to the clamp ring on one side of the mouth of the clamp ring. On the other side of the opening, the clamp ring is bent outwardly to a clamping flange having a slot open at one end. To close the clamp, the clamping screw is pivoted so that its screw head at the open end of the slot on the clamping flange passes. If the screw head has overcome the clamping flange, the clamping screw is pivoted into the slot, whereby the screw head engages behind the clamping flange. The clamp is closed. Only for tightening the clamp to, for example, an inserted tube, a rotary tool, such as a screwdriver is necessary with which the clamping screw can be tightened. The threaded element of the known pipe clamp is a metal disk with a female threaded hole, in which the clamping screw is screwed. The threaded plate forming the sheet metal disc is hinged on one side of the opening of the clamp ring in the clamp ring.

Another clamp, which is also closable without tools, discloses the publication DE 42 37 674 A1 , This clamp has two clamp brackets, each extending about a semicircle in the circumferential direction and which are hinged together at one end or on one side with a clamping screw. On the other hand, one of the two clamp brackets sawtooth-shaped notches, which cooperate with a pivotable pawl at the associated end of the other clamp bracket. A rubber ring acts on the pawl in abutment on an outwardly bent flange of the other clamp bracket. The flange has a passage opening for the notches on the end of a clamp bracket. The pawl is a sheet metal part. To close the clamp their clamp brackets are pivoted together, wherein the notches pass through the passage opening in the flange at the end of the other clamp bracket at the end of a clamp bracket. The detents lift the pawl off the flange. After the passage of the detents, the spring-loaded pawl pivots back so that it is engaged behind by the notches. The two clamp brackets are connected, ie the clamp is closed. To tighten the clamping screw on the other side of the two clamp bracket is tightened with, for example, a screwdriver. The known pipe clamp has a plurality of locking devices arranged one behind the other in the closing direction, so that it can be closed to varying degrees depending on the diameter of an inserted pipe. This shortens a clamping path of the clamping screw.

task The invention is to propose a pipe clamp without tools It can be closed in different degrees, with one structurally differently designed closure.

This object is achieved by the features of claim 1. The clamping screw of the pipe clamp according to the invention has a plurality of screw heads, which are arranged one behind the other in the longitudinal direction of the clamping screw. In particular, the screw heads are arranged one behind the other on the imaginary central axis of the clamping screw. When the clamp is closed, one of the screw heads engages the clamp ring. In addition, as usual, a thread of the clamping screw attacks elsewhere on the clamp ring, so that the clamping screw holds the clamp closed. The fact that a plurality of screw heads are arranged one behind the other, the pipe clamp in stages, which corresponds to an axial height of the screw heads, close different close. Advantage of the invention is a shortened Schraubweg when tightening the clamping screw, fewer turns are required to tighten the clamping screw.

A Embodiment of the invention provides a clamping flange on the clamp ring in front, which is an abutment for one of the screw heads the clamping screw forms. The clamping flange has a slot, which is open at one end. To close the pipe clamp The clamping screw is inserted through the open end into the slot in the clamping flange Inserted, so that the clamping screw through the slot and thus passes through the clamping flange and one of the screw heads engages behind the clamping flange. The clamp is closed and can tightened by tightening the clamping screw around an inserted tube become.

A Embodiment of the invention provides that the clamping screw movable is connected to the clamp ring, so that the screw heads in and can be brought out of engagement with the clamp ring, to close or open the clamp. The Movement of the clamping screw with which their screw heads in and out of engagement with the clamp ring can be brought, may be a displacement and / or a pivoting movement of the clamping screw be. By the movement, the clamping screw can be, for example insert into the slot open at one end in the clamping flange of the clamp ring, so that one of the screw heads engages behind the clamping flange. With this embodiment of the invention it is possible the loosely screwed into an internal thread at a point of the clamp ring Clamping screw without turning the clamping screw in and out To bring engagement with the clamp ring and thereby the clamp to close without tools.

A Further development of the invention provides that the pipe clamp a Threaded element having an internal thread, into which the clamping screw screwed is. The threaded element is movable, that is displaceable and / or pivotally connected to the clamp ring.

A preferred embodiment of the invention provides that the clamping screw resilient in the sense of engaging and engaging their Screw heads on the clamp ring is acted upon. The springy Exposure can be done for example by means of a rubber ring, engages the Schellering and a threaded member into which the Clamping screw is screwed. By the springy admission The clamping screw comes when closing the pipe clamp by itself engaged with the clamp ring.

A Embodiment of the invention provides that the clamp a Reflector has, when closing the clamp the Turn the tensioning screw so that the screw heads on the open end pass the slot in the clamping flange. While closing the clamp gets the clamping screw thereby on the clamping flange past. If the clamping screw spring loaded, it passes by itself engaging the clamp ring, it enters by itself Insert the slot in the clamping flange so that the clamp is closed is. If the clamp continues to be closed, the Deflector remove the clamping screw from the slot in the clamping flange, so that the next screw head passes on the clamping flange and then the clamping screw in the slot in the clamping flange entry. The clamp ring is characterized by the distance of the screw heads close together.

Of the Deflector can on the clamp ring, in particular on the clamping flange, for example, by an outwardly inclined surface be formed against the closing of the clamp the screw head abuts and towards the open End of the slot in the clamping flange is rejected, so that the screw head past the clamping flange. Also, the deflector can be an inclined surface be on the screw heads of the clamping screw. An embodiment The invention provides conical screw heads whose Conical surfaces form the deflector. Here is the cone shape not strictly adhered to, it is, for example, an encircling spherical peripheral surface of the screw heads all the way to a spherical shape in the invention possible. Also can the screw heads have a polygonal shape, ie be pyramidal instead of conical. Also here are after outside curved surfaces in the frame the invention possible.

A preferred embodiment of the invention provides that the clamping screw At both ends tool seats to a rotationally fixed by positive engagement Attaching a rotary tool has. The turning tool is for example a screwdriver. The tool seats are for example slots, Phillips, inner or outer polygon, inner stars or the like. The clamping screw can at both ends the same or different tool seats exhibit. Advantage of this embodiment of the invention is that the rotary tool for tightening the clamping screw at both ends the clamping screw can be applied, depending on which end is accessible.

Another object of the invention is to propose a screw with a shortened screw. This object is achieved by the features of claim 10. The screw according to the invention is in itself the clamping screw of the above-described pipe clamp as such, their use also other than on a pipe clamp is possible. The screw according to the invention has a plurality of screw heads arranged one behind the other in the longitudinal direction of the screw. Preferably, the screw heads are arranged one behind the other on an imaginary longitudinal axis of the screw. Depending on a span to be bridged with the screw, one of the screw heads is brought into engagement with an abutment or the like. In addition to the shortened screw the screw according to the invention has the advantage that its screw-headed end protrudes less far from an internal thread into which the screw is screwed. There are fewer different screw lengths required.

As above with reference to the pipe clamp according to the invention explained, an embodiment of the invention Screw screw heads with outward facing Surfaces as deflectors at their circumferences. Especially the screw heads are conical, also with spherical and / or conical Circumferential surface.

Also for the screw, the invention sees one at each end Tool seat to a non-rotatable attachment by means of a form fit Turning tool before.

A Development of the invention provides an abutment for the Screw in front, which has a slot open at one end for having the inlet and outlet of the screw. One of the screw heads The screw engages behind the abutment when the screw in the slot. In the case of the pipe clamp is the abutment the clamping flange on the clamp ring.

The Invention will now be described with reference to a drawing Embodiment explained in more detail. Show it:

1 a screw according to the invention in a perspective view;

2 the screw off 1 from another perspective;

3 a pipe clamp according to the invention in a perspective view; and

4 - 6 an enlarged view of a detail according to arrow IV in 3 in different positions when closing the pipe clamp.

In the 1 and 2 illustrated screw 1 according to the invention comprises a shaft 2 with a thread 3 as well as several screw heads 4 on. In the illustrated and described embodiment of the invention, the screw 1 three screw heads 4 on. The screw heads 4 are axial with respect to the screw 1 arranged one behind the other. The screw heads 4 are conical, they have frustoconical peripheral surfaces. The screw 1 settles with each of their screw heads 4 at an in 1 and 2 not shown abutment or the like. Hanging, causing their effective span changes. The effective span length is the length of each engaging screw head 4 to the screw head end of the screw 1 ,

The screw 1 has tool seats at both ends 5 . 6 to a non-rotatably by form-fitting attachment of a rotary tool, not shown. The outermost screw head 4 has a cross slot 5 and the screw-head end of the screw 1 a transverse slot, so a slot 6 as a tool seat. A rotary tool, such as a screwdriver, not shown, can thereby at both ends of the screw 1 depending on which end of the screw 1 is accessible.

One, not the only, use of the screw according to the invention 1 is as a clamping screw 1 in the in 3 - 6 represented clamp 7 according to the invention. The clamp 7 has two clamp straps 8th . 9 on, each extending over a little less than 180 ° in the circumferential direction and the together a clamp ring 10 form. Both clamp straps 8th . 9 have at both ends outward flanges 11 . 12 . 13 . 14 on which they are connected or connectable. On one side of the clamp ring 10 are the clamp straps 8th . 9 with a screw 15 connected by a hole in a flange 11 the one clamp strap 9 goes through and into an internal thread in the associated flange 12 the other clamp strap 8th screwed. The screw 15 can also be referred to as a clamping screw. Through the hole in the flange 11 the one clamp strap 9 connects the screw 15 the two clamps 8th . 9 articulated with each other.

One of the two clamp straps 8th has a mother 16 for fixing the pipe clamp 7 on, for example, a threaded rod, not shown. The mother 16 may be welded or otherwise fastened. The clamp ring 10 can also be called a clamp body.

On the other side of the clamp 7 has one of the outward flanges 13 a in 5 visible slot through which the shaft 2 the above explained, in 1 and 2 shown screw 1 goes through, in conjunction with the clamp 7 as a clamping screw 1 referred to as. The thread 3 the clamping screw 1 is in an internal thread of a disc 17 screwed on a the assigned flange 14 of the their clamp strap 9 facing away from the outside of the flange 13 the one clamp strap 8th is arranged. The plate 17 has an approximately rectangular shape in plan view with an arcuate outer edge. In the middle of its inner edge, the disc points 17 a not visible in the drawing, hook-shaped projection on which a rectangular hole 18 in the clamp strap 8th at the transition to the flange 13 be upheld. The hole 18 is in 4 - 6 to see. The invisible, the hole 18 sweeping hook-shaped extension of the disc 17 connects the disc 17 articulated with the clamp strap 8th , With inner edge is a the clamp bracket 8th facing edge of the disc 17 designated. The disc 17 , which has the internal thread into which the clamping screw 1 is screwed, is below as a threaded element 17 be designated.

At side edges beside the extension, which is the threaded element 17 articulated with the clamp strap 8th connects, points the threaded element 17 in side view S-shaped extensions 19 on. The S-shaped extensions 19 extend a short distance in the circumferential direction of the clamp 7 on an outside of the one clamp strap 8th , Free ends of the S-shaped extensions 19 lie outside on margins of a rubber-elastic insert 20 the clamp 7 on top of the side edges of the clamp strap 8th . 9 embraces. The edges of the rubber-elastic insert 20 act on the threaded element 17 about its S-shaped extensions 19 resiliently in contact with the outside of the flange 13 , Under the free end of the S-shaped extensions 19 have the side edges of the clamp bracket 8th Recesses on, in which the free ends of the S-shaped extensions 19 under elastic deformation of the side edges of the rubber-elastic insert 20 can enter. The recesses on the side edges of the clamp bracket 8th are from the edges of the rubber-elastic insert 20 hidden and not visible in the drawing.

The assigned flange 14 the other clamp strap 9 is referred to below as a clamping flange 14 designated. He has an outside open slot 21 on, the outwardly sloping chamfers 22 has at its mouth. The insertion bevels 22 form yet to be explained deflector for the screw heads 4 when closing the pipe clamp 7 , Likewise, the conical peripheral surfaces of the screw heads 4 Deflector.

To insert a pipe or other object into the pipe clamp 7 become the clamp straps 8th . 9 swung apart. The screw 15 connects the clamp strap 8th . 9 on one side of the clamp 7 articulated with each other. The screw heads 4 the clamping screw 1 are disengaged from the clamping flange 14 so that the clamp strap 8th . 9 can be swung apart. On the side of the clamping screw 1 has the clamp ring 10 between the flange 13 and the clamping flange 14 an opening 23 for inserting the tube, not shown. To close the pipe clamp 7 become the clamp straps 8th . 9 swung together so that the flange 13 and the clamping flange 14 approach, as in 4 to see. On further approaching the flange 13 and the clamping flange 14 pushes the outermost screw head 4 against a facing him inside the clamping flange 14 , The insertion bevels 22 and the conical peripheral surface of the screw head 4 form deflectors 4 . 22 that the screw head 4 from the clamp ring 10 push away to the outside. Because the clamping flange 14 when closing the pipe clamp 7 a still comparatively large distance from its associated flange 13 when the outermost screw head 4 the clamping screw 1 against the clamping flange 14 pushes, is the clamping flange 14 at an angle obliquely outward with respect to the clamping screw 1 , Also this outward skew of the clamping flange 14 when the outermost screw head 4 when closing the pipe clamp 7 pushes against him, presses the screw head 4 outward away from the clamp ring 10 as it is in 5 you can see. This will cause the clamping screw 1 deflected, ie pivoted outwards, so that the or the screw heads 4 outside on the clamping flange 14 and at the open end of the slot 21 can pass by. The pivoting of the clamping screw 1 with the screw heads 4 outward is through the articulated connection of the threaded element 17 with the clamp strap 8th and through the slot in the flange, through which the shaft 2 the clamping screw 1 goes through, possible. Like also in 5 to see is the threaded element 17 when swinging the clamping screw 1 outward from the flange 13 lifted. The free ends of the S-shaped extensions 19 of the threaded element 17 press the side edges of the rubber-elastic insert 20 on the outside of the clamp strap 8th elastic inside. As a result, act on the edges of the rubber-elastic insert 20 the threaded element 17 about its S-shaped extension 19 resiliently back in contact with the outside of the flange 13 , The clamping screw 1 is thereby resiliently acted against their deflection back to their original position.

When the outermost screw head 4 the clamping screw 1 on the clamping flange 14 has passed, pivots the clamping screw 1 because of their resilient loading back inside, leaving them in the slot 21 in the clamping flange 14 enters, as it is in 6 is shown. The outermost screw head 4 engages behind the clamping flange 14 , Be the clamp strap 8th . 9 further swung together, so that the flange 13 and the clamping flange 14 continue to approach, the screw heads 4 of the clamping screw 1 as explained above again pressed outwards, ie the clamping screw 1 is deflected and pivots outward, leaving the next screw head 4 outside on the clamping flange 14 can pass by. When the screw head 4 on the clamping flange 14 has passed, pivots the clamping screw 1 as described spring loaded back, leaving the clamping screw 1 back in the slot 21 in the clamping flange 14 enters and the next screw head 4 the clamping flange 14 engages behind. This continues until the last screw head 4 on the clamping flange 14 passed by and the clamping screw 1 in the slot 21 occurred and the screw head 4 the clamping flange 14 engages behind. Depending on the diameter of the inserted pipe, the pipe clamp can be 7 close different far and it engages in the manner described one of the screw heads 4 the clamping screw 1 the clamping flange 14 , For clamping the pipe clamp 7 the clamping screw is inserted around the inserted tube 1 and / or the screw 15 on the other side of the clamp 7 tightened. Because the clamping screw 1 a tool seat at each end 5 . 6 may include an unillustrated screwdriver or other rotary tool at both ends of the clamping screw 1 be set. As a result, a tightening is possible even if the tool seat 5 on the side of the screw heads 4 is inaccessible, provided the threaded end of the clamping screw 1 is accessible. On the other side of the clamp 7 is a hinged connection of the clamp strap 8th . 9 also in a different way than with the screw 15 possible, for example, the clamp bracket 8th . 9 be hinged together (not shown).

Generally, the clamping flange 14 also as an abutment of or for as a clamping screw 1 designated screw 1 be understood. There are also other uses of the screw 1 as for closing and clamping the pipe clamp 7 possible.

1

Screw / clamping screw

2

shaft

3

thread

4

screw head

5

tool seat

6

tool seat

7

pipe clamp

8th

Schell Ironing

9

Schell Ironing

10

Schellenring

11

flange

12

flange

13

flange

14

clamping flange

15

screw

16

mother

17

threaded element

18

hole

19

S-shaped extension

20

rubbery inlay

21

slot

22

deflector

23

opening

QUOTES INCLUDE IN THE DESCRIPTION

This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.

Cited patent literature

• EP 0975908 B1 [0004]
• - DE 4237674 A1 [0005]

Claims (14)

Pipe clamp with a clamp ring ( 10 ), one in the pipe clamp ( 7 ) enclosing tube and the one opening ( 23 ) for inserting the tube at a position of its circumference, which with a clamping screw ( 1 ) is closable, characterized in that the clamping screw ( 1 ) several screw heads ( 4 ), which in the longitudinal direction of the clamping screw ( 1 ) are arranged one behind the other and of which with closed pipe clamp ( 7 ) a screw head ( 4 ) on the clamp ring ( 10 ) attacks. Pipe clamp according to claim 1, characterized in that the clamp ring ( 10 ) a clamping flange ( 14 ) with a slot ( 21 ), which for the entry and exit of the clamping screw ( 1 ) is open at one end, with closed pipe clamp ( 7 ) the clamping screw ( 1 ) through the slot ( 21 ) and one of the screw heads ( 4 ) the clamping flange ( 14 ) engages behind. Pipe clamp according to claim 1, characterized in that the clamping screw ( 1 ) movable with the clamp ring ( 10 ), so that their screw heads ( 4 ) in and out of engagement with the clamp ring ( 10 ) are brought. Pipe clamp according to claim 3, characterized in that the pipe clamp ( 7 ) a threaded element ( 17 ), in which the clamping screw ( 1 ) is screwed in and the movable with the clamp ring ( 10 ) connected is. Pipe clamp according to claim 3, characterized in that the clamping screw ( 1 ) resilient in the sense of engaging and engaging its screw head ( 4 ) on the clamp ring ( 10 ) is acted upon. Pipe clamp according to claim 2, characterized in that the pipe clamp ( 7 ) a deflector ( 22 ), which when closing the pipe clamp ( 7 ) the clamping screw ( 1 ) so that the screw heads ( 4 ) at the open end of the slot ( 21 ) on the clamping flange ( 14 ) pass by. Pipe clamp according to claim 6, characterized in that the screw heads ( 4 ) one in the direction of a shaft ( 2 ) of the clamping screw ( 1 ) have outwardly directed surface at its periphery, which forms the deflector. Pipe clamp according to claim 7, characterized in that the screw heads ( 4 ) are conical. Pipe clamp according to claim 1, characterized in that the clamping screw ( 1 ) at both ends tool seats ( 5 . 6 Has) to a rotationally fixed by positive engagement attachment of a rotary tool. Screw with a screw head ( 4 ), a shaft ( 2 ) and a thread ( 3 ), characterized in that the screw ( 1 ) several screw heads ( 4 ), which in the longitudinal direction of the screw ( 1 ) are arranged one behind the other. Screw according to claim 10, characterized in that the screw heads ( 4 ) one towards the shaft ( 2 ) of the screw ( 1 ) have outwardly facing surface as a deflector at their peripheries. Screw according to claim 11, characterized in that the screw heads ( 4 ) have conical peripheral surfaces. Screw according to claim 10, characterized in that the screw ( 1 ) at both ends tool seats ( 5 . 6 Has) to a rotationally fixed by positive engagement attachment of a rotary tool. Screw according to claim 10, characterized in that the screw ( 1 ) an abutment ( 14 ) with a slot open at one end ( 21 ) through which the screw ( 1 ) in the slot ( 21 ) and out of the slot ( 21 ), wherein one of the screw heads ( 4 ) the abutment ( 14 ) engages behind when the screw ( 1 ) through the slot ( 21 ) passes through.