A method for fastening a pipe in a vertical position to a wall

Abstract: A pipe fastening clip (1) provided with a vibration damping liner (10) is loosely applied around the pipe (6') and fastened to the supporting wall (8). The pipe (6') is supported - with a collar (12'') provided thereabout in an axially fixedly manner - on the upwardly facing edge of the fastening clip (1) with the intermediary of a vibration damping element (10). Preferably the collar (12'') is formed by a second, similar fastening clip that is fixedly clamped about the pipe (6'). The invention also relates to a vibration damping liner (10), which is integrally formed with the vibration damping element.

Description: The invention relates to a method as defined in the first part of claim 1. When suspending pipes or conduits in a rather vertical position to a wall, such as fall pipes for rainwater and similar pipes to vertical walls of buildings it has been usual to suspend such pipes at a certain distance from the wall by means of a pipe clip that is formed of a metal strip and that is provided with a shock absorbing liner. Such pipe clips are disclosed in DE-3439418, EP-A-0188649, EP-A-0387966 and DE-A-3708065. The pipe clip is usually screwed - by means of a nut welded to it - onto the free end of a threaded rod or the like extending from the support wall. The fastening has to be such, that the pipe is prevented from sinking through the fastening clip by gravity. Therefore it has been common practise to clamp the fastening clip rather tightly around the pipe. As a result of this the liner is compressed between pipe and pipe clip to an extent, that the absorbing effect of the liner with respect to (sound) vibrations within the pipe (which may e.g. caused by rainwater flowing therethrough) becomes insufficient. The sound connected with the water falling through the pipe may then easily penetrate through the pipe fastening into the space behind the respective supporting wall. In practise it has also been known to fasten a pipe to a wall in a vertical position by proceeding along the lines of the first part of claim 1 (page 4 from the catalogue of the firm AKO Rohre Systeme Technologien GmbH & Co. KG of 1 July 1989). With this well-known method a flat ring-shaped element of rubber is applied to the downwardly facing surface of the collar after which the pipe to be fastened is inserted through the ring-shaped support body so as to have the pipe with said collar seated onto the upper side of said ring-shaped support body via said rubber element. It is to be noted that prior EP-A-0508085 (vide fig. 3 in particular) discloses a similar method for fastening a pipe to a wall in a substantially vertical position and in a shock and sound absorbing manner. More particularly with this prior proposal a special pipe clip is used, which is formed from a channel profile. In use, with the clip body loosely surrounding the pipe, the channel is facing with its opening upwardly and contains shock absorbing material to resiliently support the collar on the pipe. The present invention aims at providing a solution for the problem above referred to, by improviving the well-known method. This aim is achieved by the features of the second part of claim 1. In this manner the absorbing function of the liner of a universal fastening clip attached to the wall may be completely exploited, whereas on the other hand a shock absorbing support of the pipe is obtained on the upper edge of the fastening clip by which it is loosely surrounded. The supporting function and the spacing and guiding function of the fastening clip have become separated, so that it is no longer necessary to fixedly clamp the clip with its liner about the pipe. In a preferred embodiment a second, similar pipe clip, which remains free from the supporting wall, is clamped around the pipe to function as a support collar. The invention also relates to a pipe-clip of the type according to the first part of claim 3. Such a pipe-clip is disclosed in EP-A-34 39 418 and is usually applied in cases, where the pipe or conduit to be fastened, mostly in a horizontal position, has to be suspended from a wall in a rather vibration- or shockfree manner. At projections of the liner, which extend laterally (axially) from the upstanding edge portion(s) engaging the edge(s) of the circular clip body are formed by thickenings at the transition(s) between the web of the liner and the edge portion(s) extending at right angles to it. It is also an object of the invention to improve a pipe-clip with a liner of the latter type in such a way that, when it is used for fastening a vertical pipe, it may also function as a vibration-cushioning support for a support collar to be applied about the pipe. In accordance with the invention this aim is achieved by the features defined in the second part of claim 3. When using a pipe-clip equipped with a liner thus formed for suspending a vertical pipe or conduit the projections provided in accordance with the invention will become facing upwardly so that they function as a vibration-damping basis for a support ring or flange (to be) provided around the pipe to be suspended. In a practical embodiment two spaced projections are provided to form the said projections. In a preferred embodiment the two circumferentially extending ribs are unitedd to form a hollow profile. Further features and adwantages of the invention will be hereinafter further explained by way of two examples with reference to the drawing. Fig. 1 shows a pipe clip fastened to a wall in accordance with the invention, together with a pipe section carried by it, one half being shown in a side elevational view and the other half being shown in longitudinal section; fig. 2 shows a modification of the the embodiment of fig. 1; fig. 3 is a cross-section on an enlarged scale of the liner used with the pipe fastening according to fig. 1 and 2. With reference to the drawing 1 is a pipe clip of a well-known type per se. The fastening clip has an annular clip body 2 which is usually formed of metal and the flanged ends 3, 4 (shown to the front) of which may be tightened by means of a clamping screw 5 so as to clamp the clip more or less tightly around the pipe 6 to be suspended. The annular clip body 2 often consists of two halfs, which in the example shown are hingedly connected behind the pipe 6. A second flange connection at that location, however, is also possible. On the outer side of (one of the two parts of) the clip body 2 a nut 7 is provided as by welding, by means of which the clip is threadingly engaged on the end of a threaded rod 9 that is attached to the supporting wall 8. The pipe clip 1 is provided with a liner 10 which extends along the inner circumferential surface of the clip body. This liner, an enlarged cross-section of which is shown in fig. 3, consists in a well-known manner of a strip of flexible rubber or the like. This rubber strip engages the edges of the clip body 2 through upstanding and inwardly projecting longitudinal edge portions 10a and 10b respectively; furthermore it is provided, at its face turned towards the pipe to be suspended, with ribs 10c which circumferentially extend in the assembled state. The liner 10 also comprises outwardly extending projections 10d which extend radially from the upstanding edge portions 10a and are formed - in the example shown - by two spaced ribs. The thickness of these ribs substantially corresponds with that of the easily flexing inwardly projecting edge portions 10b, whereas the height of the ribs is in the order of twice the rib thickness. The fastening clip 1 equipped with the liner as described hereinabove is applied about the tube 6 (which may be formed of e.g. plastics material) rather "loosely", i.e. not tight enough to prevent the pipe from sliding through the clip downwardly under gravity. generally speaking there is hardly any contact between the ribs 10c and the pipe 6. In order to secure such a loose enclosure of the pipe 6 a filling washer 11 may be provided between the flanges 3 and 4, as known per se from EP-A-0387966. Yet the suspended pipe is locked in place, i.e. is prevented from sinking through the clip, by having the ribs 10d, which in use are facing upwardly, function as an annular bearing for a supporting rim or flange 12 that is fixedly connected about the pipe 6. Tests have shown that with a (fall) pipe suspended in the above manner a surprisingly good sound damping effect is obtained from the liner according to the invention. In the example of fig. 1 the collar 12 is integrally formed with the pipe 6. In fact fig. 1 shows a connecting socket with a support flange integrally formed therewith and formed of a plastic material that is typical for this type of pipes. The flange 12 is formed at the transition between an upper socket portion 6a adapted to receive an upper pipe section and a lower spigot portion 6b adapted to be inserted in a lower pipe section. In fig. 2 a normal, continuous fall pipe is shown, around which pipe clips of a well-known type are fixedly clamped at radially spaced locations to function as supporting rim or collar 12' and to remain free from the wall. The clip body of such a fastening clip may have the same size of that of the pipe clip 1. However, no use is made of a filling washer 11 when clamping the clip 1' around the pipe 6'. It is an advantage of this second embodiment that the pipe to be suspended may initially positioned relative to the supporting wall in the horizontal direction, while being loosely enclosed by the clips attaching the pipe to the wall the pipe is then positioned in the height direction and finally the clips 12' are applied about the pipe and rigidly clamped. This avoids the need of determining the exact fastening locations in advance. The projections 10d, which contribute to the vibration damping effect of the liner 10, may be united to a rounded hollow profile, such as indicated by the dash lines in fig. 3. The liner of the auxiliary clip functioning as a support collar 12' could be correspondingly shaped, in which case the two liners would be supported one on the other with the intermediary of two hollow profiles.

Claims: A method for fastening a pipe (6) to a wall (8) in a substantially vertical position and in a shock and sound absorbing manner, comprising the of: fastening a generally circular pipe support body (2) to the supporting wall, selecting the size of said support body so as to allow the pipe (6) to be slidably surrounded by said body (2) without being contacted by it; providing the pipe (6) with a fixed collar (12; 12') and placing the pipe (6) substantially coaxially within said support body (2) and with a sound absorbing means (10d) interposed between the upwardly facing edge formation of the support body (2) and said collar (12; 12'), characterized by the use of a pipe support body in the form of a pipe clip of a type formed of a metal strip and that is provided - at its inner circumferential surface facing towards the pipe - with a shock and sound absorbing liner (10) of an elastomeric material, said liner having an edge portion (10a) that engages the upwardly facing edge of the clip body strip (2) and is integrally formed with said shock and sound absorbing means (10d) the latter being in the shape of flexible projections (10d) which extend axially and upwardly from said edge portion (10a) and having a length which is in the order of twice of its thickness. A method according to claim 1, characterized in that a second, similar pipe clip (12), which remains free from the supporting wall, is clamped around the pipe to function as a collar. A pipe clip (2) for fastening a pipe to a wall, comprising a shock absorbing liner (10) of the type comprising a strip of flexible rubber material or similar elastomeric material, having along at least one of its longitudinal edges an upstanding edge portion (10a) and a flexible portion (10b) extending therefrom inwardly to engage around an edge of the circular body of the pipe clip, projections (10d) being provided that extend laterally outwardly (= axially when mounted on a pipe clip) from said upstanding edge portion (10a), characterized in that said laterally outwardly extending protections (10d) have a thickness that substantially corresponds to that of said flexible inwardly extending portion (10b) and a length (height) which is in the order of twice said thickness. A pipe clip (2) according to claim 3, characterized in that two spaced projections (10d) of the liner (10) are united to forming a hollow profile.

Inventors: VAN WALRAVEN JAN, VAN WALRAVEN, JAN
Applicants: WALRAVEN J VAN BV, J. VAN WALRAVEN B.V.
Application year: 1993
Main classification: F16L3
IPC codes: F16L3, F16L55