FR2571465A1 - COLLAR FOR PIPES - Google Patents

Abstract

CLAMP FOR PIPES: -This CLAMP CONSISTS OF A ARCLE 10, 12 WHICH PRESENTS AT LEAST ONE OPENING HAVING A CLAMPING SCREW 26 ON ONE SIDE WHICH IS MOUNTED SO THAT IT CAN SWIVEL JOINTLY TO A CORRESPONDING NUT 30. ON L 'OTHER SIDE FROM THE OPENING, THE HEAD OF THE SCREW MAY ENGAGE AND LATCH IN AN ELONGATED HOLE 36 SHAPED IN A PROJECT 22, NARROW THAN THE SMALLEST TRANSVERSAL DIMENSION OF THE SCREW HEAD AND WHICH BEHAVIOR TO ITS RADIALLY INNER END AN ENLARGEMENT SHAPED IN THE ARCLE 12 AND THROUGH WHICH THE SCREW HEAD CAN PASS TO BE THEN HANGED IN THE EXTENDED HOLE 36. AFTER THIS HANGING, THE SCREW HEAD IS TURNED USING A TOOL IN ORDER TO TIGHTEN AND LOCK THE COLLAR; -APPLICATION FOR THE FITTING OF PIPES IN GENERAL.

Description

The invention relates to a hose clamp formed by a

  substantially circular arch, provided with a fixing element and

  at least one opening delimited by flanges which project radially

  dialing, and at least one clamping screw which can oscillate on a

  nut or similar element housed on one of the flanges and hang with its head in an elongated hole formed and oriented radially in the other

  flange, and open at one end.

  A hose clamp of the kind indicated above is described in patent DE-OS 33 46 423 where it can be seen that the nut forming the foot of the screw, thanks to a hook formed on this nut on the radially side inside with respect to the axis of the collar, can oscillate in an eyelet-shaped flange attached to the hoop of the clamp. The other flange has an elongated hole opening radially outward

  to allow to introduce the head of the screw. This assembly does not

  however, hardly comes to withstand significant efforts, since the nut of the screw is suspended only on its small hook, and the head of the screw tends to slide radially outward and out of the

  elongated hole in case of deformation of the pipe clamp.

  Due to the tendency of the clamping screw to tilt radially-

  ment outwardly out of its normal position, even a locking collar for pipes according to the prior art mentioned above can not be achieved with an opening oriented radially inwardly according to DE-OS patent 33 08 459. In addition, there still remains the weak point represented by the hook subjected to the clamping force.

  at the location of the clamping screw nut.

  The object of the invention is therefore to solve the problem

  that poses the realization of a collar for pipes of the aforementioned kind, the-

  which is characterized jointly by a high resistance to loads

  of work and by a simplified assembly.

  This problem is solved according to the invention by the fact that the fulcrum of the nut during its pivoting is located at the free end of the flange which is located radially outside a larger hole

  that the diameter of the screw rod, and that the screw nut is hand-

  held so that it can oscillate so that the clamping screw which

  crosses this hole can oscillate away from its perpendicular position

  cular to the flange, the head of the screw then tilting towards the opening made at the opposite radial end of the elongated hole made in

the other flange.

  The invention has the advantage of maintaining the clamping screw by -2 -

  its two ends in support conditions offering more se-

  curity and allowing to support higher loads, while self-

  risking the active positioning of the screw by a simple movement of

  pivoting. It is therefore irrelevant that the nut is offset from the

  literally relative to the pivot point, i.e. at the end

  c8té head of the screw, or if it constitutes the head. Preferably, we have-

  will opt for the first alternative mentioned above, because in this case the screw can be of the simple diametral slot type, with cruciform head or with hexagonal head, male or female, and actuated by a simple screwdriver or a pipe wrench, or using a mandrel mf by electricity, while the rod of the screw which crosses the nut towards the fixing side

  hose clamp does not represent a danger of injury to the user

  reader. Furthermore, the locking device for a collar of the kind proposed here is advantageous in that a nut forming a screw base

  exerts on the clamping screw, during assembly, a torque

  in the direction that forces the screw to engage in the elongated hole. In addition, there remains the possibility of providing, as a nut engaged by the screw rod, a hinge pin pivotally housed in

  the hoop or collar, this axis being crossed radially by a ta-

  threaded in which engage the threads of the clamping screw.

  To prevent the head of the screw from escaping by sliding out of the elongated hole by a movement in the longitudinal direction of the hole, provision is made, in accordance with an improved embodiment of the invention, to extend the hole elongated to a point beyond the angle formed between a protruding flange and the arch, towards the interior of the latter, to connect at this point with the enlarged part. In this way, one obtains, in the passage between the flange and the collar, a

  bleacher or a stepped projection whose role consists of many

  place the screw head in the elongated hole. It is obvious that instead of bleachers of this kind we can provide a separate, independent or

  added, on the external surface of the split flange, this part can

  before being radially close to the head of the screw or even under

  this head, after which a groove for retaining ring can be used

  bare, in which engages the underside of the screw head. For

  facilitate disassembly the passage of the screw head on the step or

  this reported and the radial sliding of this head inwards by

  in relation to the flange, it is possible, according to another advantageous embodiment, to

  tion of the invention, provide an arrangement in which the surface of 3 - the stepped projection, against which the head of the

  screw, has a boss or on the contrary a cavity which acts as

  tool element, in order to raise the screw head to widen the elongated hole and / or apply pressure with a tool against the flange, without risk of slipping in the direction of closing of the collar. In another alternative embodiment of the invention, it could also be arranged that the elongated hole, in which the head of the screw must be hung, is made not in a flange secured to the collar but in a bar which s hinges on the collar. Other alternative embodiments can be envisaged by ensuring that the widening of the elongated hole, in which the head of the screw is to be hung, is located wholly or partly in a projecting part, independently of the fact that the latter is produced in the form of a flange or a bar pivotally mounted on the collar. In another analogous embodiment of the invention, the planned enlargement is not

  not connect exactly in the radial direction with the elongated hole, widen

  sliding in which the screw head must be hung, and the midpoint of this enlargement is offset axially towards the midpoint

of this elongated hole.

  It is not absolutely essential for the purposes of this information.

  vention, that the nut is made integral with a flange provided with a

  widened tie and placed opposite the elongated hole, in order to pocket the nut

  turn with this flange when the screw is actuated by turning

  ner the head of the screw. However preferably and at a minimum, when the screw head is hung in the elongated hole formed in the projection and a tensile force is exerted on the clamping screw, the nut must be positively pocketed to turn. This can be achieved in an even simpler embodiment of the invention by making sure that

  the nut, during assembly, either comes to rest against an overhang

  cover provided on the periphery of the flange, or be housed in a hole

  or a recess provided for this purpose in the flange.

  To facilitate and speed up assembly, deformability or mo-

  The flexibility of the pipe clamp plays an essential role. In a pre-

  féré of realization there is therefore provided a collar in one piece whose strength is such that it can no longer be easily bent; at least this collar must have a limit point of bending that we can

  locate for example either near the flange or the diametrical side

  opposite. Preferably, the clamps made in two parts

  ties comprising following a particular embodiment of the invention,

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  -4 - on the side opposite the flange, a junction between these two parts which allows a certain radial clearance. The preferred embodiment from the practical point of view provides, on the one hand, that the nut in which the clamping screw is to be engaged is constituted by a washer or plate provided, at the opening of the pipe clamp, with a hole with a threaded sleeve

  or a thread, as well as a second hole, this washer or plate-

  being made captive by a curved bar and engaged in this other hole, and on the other hand that the aforementioned junction, located on the

  opposite side of the pipe clamp, consists of a second clamp screw

  o10 rage which crosses two flanges arranged opposite one another, so that the flange provided on the same hoop of the collar as the projection provided with the elongated hole with its widened part is provided with a hole which, seen in the radial direction is wider than the diameter of the screw rod but narrower than the diameter of the screw head, while for

  the rest of this link provided on the opposite side of the neck opening

  tying for pipes is identical to the connection initially planned on this opening. In addition, there is an additional possibility, namely that of making a pipe clamp in two parts, both of which

  Lockable screw locking means are in accordance with the invention.

  Finally, it should be noted, as a complementary feature

  preferred invention of the invention that, in cases where the widening of the elongated hole, in which the head of the screw is hung, would be provided in

  the collar itself, the terminal edge of the enlargement is covered

  radially inward. This bent terminal edge, which

  in the form of a short tongue folded radially inward

  is doubly advantageous. In fact, on the one hand, it prevents a protective rubber liner housed in the pipe clamp from sliding opposite the widening of the elongated hole, which makes mounting of the collar more difficult, and on the other hand , it prevents, by extremely simple means, that the end edge can engage during assembly in a transverse slot of the head of the clamping screw, which would then prohibit the rocking movement

  necessary to secure the tightening screw.

  The invention will now be described in more detail with reference to the accompanying drawing which shows schematically by way of example a possible embodiment of the invention. In the drawing: FIGURE 1 shows a side elevation view of a pipe clamp after closure; FIGURE 2 shows the hose clamp of Figure 1 ready for

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mounting, and

  FIGURE 3 shows a side elevation view but after rotation

  90 degrees of the collar of Figure 1.

  The hose clamp shown in the drawing includes

  takes a ring made up of two separate parts or half-collars 10 and

  12. On part 10, a fixing element 14 has been welded, in this example

  ple in the form of a threaded nut, which allows the collar to be attached to

  pipes against a wall or under a ceiling.

  The two parts 10 and 12 of the clamp have at their

  ends of the flanges designated respectively at 16, 18 and 20, 22. The as-

  semblage between the two parts 10 and 12 is carried out using clamping screws 24, 26 and nuts 28, 30. The clamping screws 24, 26 are engaged

  through holes, elongated in the radial direction, which are pra-

  tapped in the flanges 16, 18 and 20. These elongated holes have, in the loosening state shown in Figure 2, a certain radial clearance between the two parts 10 and 12 of the pipe clamp and allow the clamping screws to take an inclined position relative to the flanges. To allow this inclined position shown in Figure 2, the nuts 28, which, in the example shown, are in the form of plates

  in relatively thin sheet, are only maintained with the possibility of pivoting

  only by the free ends of the flanges 16, 18, thanks to er-

  angled cups 32, 34 provided at these ends. These pins 32, 34 each pass through a hole provided for this purpose in the corresponding nut 28, 30 and their end is inclined towards the corresponding hoop of the collar so as to effectively allow the nut to pivot at a determined angle, without be able to detach from the flange. Therefore,

  the nuts 28 and 30 are held in a so-called "captive" manner on the collar

tie for pipes.

  Another original characteristic of the nuts 28, 30 lies in the fact that they have a peripheral contour which fits into that

  flanges, and their edges are bent so that they overlap

  see the side faces of the flanges. Thanks to this arrangement, a

  part we ensure the positive maintenance of the nuts 28, 30 against any movement

  rotation on the flanges, and on the other hand we get a cover

  sometimes rounded edges of these flanges have rounded edges. Finally, thanks

  this with an appropriate profiling of the bent edge of the nuts, this edge could also be used to hold in place for example a screwdriver, so that this can exert pressure on the screw head or on the flange 22. -6 -

  As shown in Figure 1, after assembly the ends

  free mites, largely protruding, clamping screws 24, 26 are

  wind on the same side of the flange as the fixing element 14, that is to say

  say so as to be oriented towards the wall or the ceiling, while the screw heads can be freely accessed, either from the front or from below.

  To be able to mount the pipe clamp in a special way

  Rely simple, it is provided in one of the flanges, against which comes to bear or bear a screw head (in this case the flange 22), an elongated hole 36 which, like the elongated hole provided in the other flange, is slightly wider than the screw shank and narrower than the screw head. Unlike the holes formed in the other flanges, this elongated hole 36 extends towards the inside of the half-collar, in an area 38 where it is widened so as to be slightly wider and higher than the head of the screw. The passage between the narrower part 36 and the wider part 38 of the opening made in the flange 22 and the contiguous zone of the hoop of the collar is located not directly in the passage between the flange and this hoop, but at the contrary in an area slightly offset towards the inside of the hoop, in order to form on the latter a heel or step which prevents the head of the tightening screw 26, after the engagement of this head in the enlarged part 38 of the hole

  and after it has been laid flat against the flange 22, slide again

  calf radially inwards, outside this flange 22. To open the collar, on the contrary, the head of the clamping screw 26 must be moved apart sufficiently from the flange 22 so that it can be released radially inwards in the part enlarged 38 of the hole, located at a certain

distance from flange 22.

  It is obvious that the invention is in no way limited to the particular embodiment described and shown here. So the invention

  applies to necklaces formed in one piece as well as those composed

  with more than two half-collars or hoops. Instead of clamping screws, the head of which is provided with a simple slot for a conventional screwdriver, it is also possible to use other types of screw heads, for example screws.

  with cruciform slits, or with hexagonal head male or femaleetc.

  Apart from the preferred form of the holes 36, 38 whose passage between the narrower part 36 and the wider part 38 is located at a certain distance from the flange 22, provision could also be made for

  this wider part 38 extends at least partially up to the

  flange 22. In this case, it is not necessary to offset 7 - the two halves 10 and 12 of the pipe clamp with respect to one

  the other, or that the head of the clamping screw 26 has a space

  equally important intermediate between the pipe and the hoop of the collar, to

  being able to introduce this head through the wider part 38 of the hole.

  The nuts 28, 30 could also have a simpler shape

  than that shown and it is not essential that they are main-

  held in a so-called captive manner by pins 32 and 34. A pulling force

  tion, tending to apply the nut 30 against the flange 18, acts on the clamping screw 26 almost immediately after the attachment thereof in the hole 36, 38 formed in the flange 22. To then prohibit the rotation of the nut 30 when tightening the screw 26, it is therefore sufficient that a non-rotating face of the nut 30 can bear against a projection

  of the flange 18 or, conversely, that a projection of the nut 30 can carry

  ter against a peripheral surface of the flange 18 or against any other

adequate non-rotating surface.

  Figure 2 shows how, during the assembly of the two parts and 12 of the collar, during assembly, the area of the flange 22 abuts against the clamping screw 26. This assembly is thus facilitated, if the

  head of the screw and / or the clamp are made with a

  low inclination in the passage area between the flange 22 and the hoop of the collar, so that a pressure oriented radially inwards

  is exerted on the head of the clamping screw 26. This results in a sol-

  licitation of the nut 30 towards the flange 18, which exerts on the screw 26 a reversal torque which immediately pushes the head of the screw

  through the widened part 38 of the hole in the radial direction and towards the outside

  laughing, when the screw head reaches this enlarged part 38 of the hole

  as a result of the bringing together of the two half-collars of the device.

  Another possible modification is that the nuts

  28, 30 can be made so as to form an integral part of the bri-

  respective 16, 18, so that even in this case it is a-

  advantageously possible to use between flanges and nuts only-

  relatively narrow pins or tenons, which allows the nuts

  perform oscillating movements, as shown in Figure 2.

  The invention is particularly suitable for necklaces of

  clamp designed to be internally lined with rubber coating

  chouc, intended to dampen noise, because in this case, during assembly, there is more room for the head of the clamping screw 26 in the interval between the arches of the pipe to be fixed. To prevent the rubber lining from sliding opposite the widened part 38

22571465-

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  of the elongated hole 36, it is possible, as shown in Figure 1, to bend radial-

  inwards the terminal ar8te of the enlarged part 38 of my

  to form a short tongue 40.

  Finally, there is yet another possible embodiment, shown in FIG. 2, in which the flange 22 has over its entire periphery a rim of greater thickness 42. This makes it possible to facilitate

  the attachment of the clamping screw 26 using a tool which takes

  then on the flange 22, without risk of the tool slipping out of this

flange 22.

  In addition to the embodiments shown and described here,

  we can consider another alternative embodiment in which the collar

  tie for pipe, instead of being fixed by an element such as nut 14,

  is kept in place for example using the clean clamping screws 26

  ment say that attach it to a support member of the eyelet or ball type

  suspension key. In this case, the head of the clamping screw 26 is first threaded through the eyelet or loop, then it is hooked into the hole

  elongated 36 of the flange 22, to finally block it with a lathe

nevis or other similar tool.

2571465-

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Claims (12)

REVENDI CATIONS   1. Pipe clamp, consisting of an ar-   skin of substantially annular shape, with a fixing element, at least one opening delimited by flanges which project radially and a clamping screw allows-   both bring the above-mentioned flanges together and which, by a   pivot head of the screw head relative to a cooperating element bearing against one of the flanges, can be hung in an elongated hole oriented radially and formed in the other flange, this collar being characterized in that the pivot point of the cooperating element (30) of the screw is at the free end (34) of a hole (36) whose width allows the passage of the threaded rod   of life, this hole being oriented radially outwards   of a first flange (18), and that this element coo-   port (30) is held so as to be able to oscillate so that the clamping screw (26) which passes through said hole can tilt out of its position perpendicular to the flange (18) towards an opening (38) formed at the end radially inner of said elongated hole (36) made in the other flange (22).   2. Pipe clamp according to Claim 1, charac-   merited by the fact that the elongated hole (36) extends in the known manner beyond the angle formed between the flange   (22) and the arch (12), inside the latter, where the   said hole connects to an enlarged part (38) forming a passage for the head of the screw.   3. Pipe clamp according to either of the Reven-   dications 1 or 2, characterized in that the element co-   operating consists of a nut (30) held in place by a lug (34) formed at the free end of the first flange (18),   4. Pipe clamp according to Claim 3, charac-   terified by the fact that the nut (30) is constituted by a pro-   long, folded and provided with a tapped hole, the flange (18),   5. Pipe clamp according to Claim 3, character-   laughed at by the fact that the nut (30) is constituted by a plate   quette with a threaded sleeve or a single hole Z571465- - 10 -   tapped, as well as a second hole in which a lug   (34) curved door captive against said plate quette.   6. Pipe clamp according to Claim 5, charac-   terrified by the fact that the plate (30) is bent on its periphery so that, when the collar is closed   and tight, said plate surrounds the peripheral surfaces of the two flanges (18, 22).   7. Pipe clamp according to any one of the Reven-   dications 1 to 6, characterized in that that of the over-   faces of the flange (22) against which comes to bear   the head of the screw has an additional thickness (42) or a   which can either be a tool extension for   lift the head of the screw towards the opening (38) of the hole   length, and / or allow to apply the head of the screw against   the flange (22) using a tool in the proper direction to close sea the hoop.   8. Pipe clamp according to any one of the Reven-   dications 1 to 7, characterized in that it comprises a single-piece hoop with at least one theoretical point of flexion.   9. Pipe clamp according to any one of the Claims-   cations 1 to 7, characterized in that it comprises an ar-   skin in two parts (10, 12) including the assembly (16, 20, 24,   28) is carried out with a radial clearance on the side 6 opposite the greenery.   10. Pipe clamp according to Claim 9, charac-   terrified by the fact that assembly is ensured by a se-   clamping screw (24) which passes through two flanges (16, 20) so that the flange (20) formed on the same part   of the collar (12) as that which includes the flange (22) present   te an elongated hole (36), and that this hole, seen in the radial direction, is longer than the diameter of the screw rod, but narrower than the diameter of the screw head, the rest of this assembly also being performed as   the one provided on the opening side of the collar.   11. Pipe clamp according to any of the Re-   vendications I to 10, characterized by the fact that a surface   inclined is provided on the head of the screw and / or on its surface - 11-   bearing face against the flange (20, 22), this inclined surface   born under the effect of mutual pressure produced during   during the closing of the collar, stressing the screw head radially inward.   12. Pipe clamp according to any of the Re-   vendications 1 to 11, provided with a terminal edge of the   widening (38) of the elongated hole (36), located in the rear   skin (12), characterized in that this edge ends   nale (40) is bent radially inward.