Classifications

• • H—ELECTRICITY
  • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
  • H02G3/00—Installations of electric cables or lines or protective tubing therefor in or on buildings, equivalent structures or vehicles
  • H02G3/22—Installations of cables or lines through walls, floors or ceilings, e.g. into buildings
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
  • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
  • F16L5/00—Devices for use where pipes, cables or protective tubing pass through walls or partitions
  • F16L5/02—Sealing

Definitions

• the present invention concerns a system of concealing an attachment of a duct to and against a mainly perpendicular wall, in which the system comprises a cover frame being arranged to wholly or partly enclose the duct to the wall.
• the cover frame consists partly of a wall collar, intended to extend along the wall, and partly a duct collar extending along the duct.
• duct here, is meant a tube-formed construction commonly showing a rectangular or square cross-section and intended to contain electrical and telephone cables and equipped with outlet points for these cables.
• Cover frames in the form of prefabricated plastic elements also occur and are mounted in parts enclosing the duct. The parts are fastened together when male and female parts are pushed together whereupon the completed cover frame is normally glued onto the wall. Even these cover frames can also be glued to the ducts in question.
• the disadvantage with the familiar system of concealing the attachment of ducts to walls lies in the fact that the wall is generally damaged by the dismantling of the cover frame, for example in connection with repairs to the duct. In such cases repairs to the wall are also required.
• Another disadvantage is that during assembly of this type of cover frame glue or screws or nails must be available to be able to fix the cover frames on the wall/duct.
• the purpose of the present invention is to achieve a system for concealing an attachment of a duct intended, for example, to enclose electrical and telephone cables to and against a mainly perpendicular wall which does not show any of the above-men ioned disadvantages.
• the objective has been achieved with the present system which comprises a cover frame arranged to wholly or partly enclose the duct to the wall and which is easily assembled and disassembled.
• the cover frame according to the invention consists of a C-shaped base part arranged to enclose a duct with a preferably rectangular or square cross-section.
• the cover frame can also consist of a preferably straight side part to allow complete enclosure of the duct's four sides. The side part comes into use with a detached duct, which is accessible on all sides.
• the cover frame consists of a wall collar, arranged to extend along a wall, and a duct collar, arranged to extend along the duct in fixed state.
• the wall collar and the duct collar respectively are made of a spring material and exhibit a cross-section which, during assembly of the cover frame, are deformed elastically when the cover frame is exposed to an external force .
• counter- directional forces arise by which means the friction between the duct collar and the duct increase and retain the cover frame to the wall.
• the duct collar can produce increased friction on the contact surfaces of the duct or be supplied with a friction element, which can be achieved in many different ways and preferably arranged on two opposite sides of the duct collar. It is preferred that the friction element is in the form of a friction strip which extends along the duct collar and completely encloses the duct.
• the mounting of a completely enclosed cover frame on a detached duct is usually done so that the base part is first pushed in perpendicular to the duct until it is in contact with three sides of the duct. After that, side parts are fixed to the base part whereupon the assembled cover frame is pushed by hand with light contact against the wall. Subsequently the cover frame is pressed to the wall with a force, which causes a springing-in of its cross-section against the wall. When the pressure force ceases, the cover frame strives to resume its original shape, whereby the friction element, which is itself between the cover frame and the duct, is exposed to normal forces which increase the friction between the cover frame and the duct and retains the cover frame against the wall.
• Figure 1 shows a disassembled, not mounted cover frame seen in a view towards its front.
• Figure 2 shows the cover frame according to Figure 1, seen in a view towards its inside.
• Figure 3 shows the cover frame according to
• Figure 4 shows a section through a part of the cover frame provided with a friction strip.
• Figure 5 shows the friction strip included in Figure 4 in enlarged cross-section.
• Figures 6 and 7 show the cover frame, according to the invention, assembled on a horizontal duct and attached to a wall.
• Figures 8 and 9 show the assembly stages for attaching the cover frame to a wall
• Figure 10 shows the assembled cover frame in a cross-section attached to a wall.
• the cover frame 1 which is shown in figures 1 to 3, is intended for assembly on a duct with a rectangular cross-section and comprises a C-shaped base part 1.1 and a straight side part 1.2, which is provided with projecting fixing lugs 1.3 which are shaped to be connected to corresponding cavities 1.4 in the base part 1 and are snap-fixed into these.
• the base part 1.1 is united with the side part 1.2
• the cover frame is completely closed and can surround the duct on all sides.
• the side part 1.2 can be omitted and only the base part 1.1 mounted.
• the cover frame 1, that is to say the base part 1.1 as well as the side part 1.2 according to the invention is showing, in a cross-section as seen in Figure 4, partly a wall-contacting wall collar 2.1, partly a duct-contacting wall collar 2.2, which in the cross-section extend to an angle with each other.
• the wall collar 2.1 shows a surface contact edge 2.3 which extends mainly perpendicular from the outer part of the wall collar 2.1 and is intended to lie against the wall at a distance of, for example, a cavity in the wall, for carrying through or attaching the duct in question.
• the duct collar 2.2 is, in this example, shown "double- folded" so that an inner section 2.4 extends backwards from the outer edge of the collar and is generally parallel with the side of the duct in towards the interior of the cover frame 1.
• the inner section 2.4 forms, together with the outer part of the duct collar
• an extended pocket 2.5 which runs round the inside of the cover frame 1 and is used to accommodate a friction strip 3 which, for example, can be made of rubber material with high friction in surface contact with the outside of the duct.
• the wall is represented by the dotted line 4 and the duct by the dotted line 5.
• the wall collar 2.1 slants somewhat from the duct 5 and against the wall 4
• the duct collar 2.2 slants somewhat from the wall 4 and the duct 5, by means of which a space 6 is created between the wall 4, the duct 5 and the cover frame 1.
• the friction strip 3 shows a generally U-shaped cross-section with a channel 3.1 meant for gripping around the inner edge of the inner section 2.4 on the duct collar 2.2.
• the two legs which surround the channel 3.1 are made partly by the inner strip 3.2, which is meant to be inserted in the pocket 2.5 which runs around the inside of the cover frame 1, and partly by the outer strip 3.3 which is meant to lie against the duct 5 and by its friction hold the cover frame 1 against duct 5 by the wall 4.
• the outer strip 3.3 shows, in cross-section, an outward tapering portion 3.4 supporting two oblique, outward-pointing ribs 3.5 which, when the cover frame 1 is brought in towards the wall 4, are folded in towards the tapering portion 3.4 and which, when the cover frame 1 is brought into place, spring out and counteract any sliding of the cover frame 1 from the wall 4.
• the cover frame 1 In assembled condition on a horizontal, detached duct 5, the cover frame 1, as is shown in Figures 6 and 7, is, with the base part 1.1, directed out towards the room and the side part 1.2 located on the back of the duct 5 in that space which is developed between the duct 5 and with the parallel wall 7. Consequently the duct 5 runs along and at a distance from this second wall 7 and is attached to the first wall 4.
• the duct 5 extends between two parallel walls 4 but which are not shown in the figures .
• the assembling of the cover frame 1 on a duct 5 is carried out in the way, which is described in connection with Figures 7 and 8.
• the base part 1.1 of the cover frame 1 is pushed perpendicularly in towards the front of the duct 5 so that it makes contact with three of the sides of the duct 5. This is done at a distance form the wall 4 in a position, which is shown in Figure 7.
• the side parts 1.2 are fixed to the base part 1.1 with the help of the above-mentioned fixing elements 1.3 and 1.4.
• the cover frame 1 is pushed by hand to make light contact with the wall 4 after which it is pressed against the wall 4 with a force that causes a springing- in against the wall 4 as shown in Figure 8.
• cover frame it lies within the scope of the invention to allow the cover frame to be divided into more parts than those, which are described above as well as also being suitable for ducts with other than a right-angled cross- section. It also lies within the scope of the invention to allow the wall collar 2.1 and the duct collar 2.2 to be formed in a single continuous detail which can extend flat or bent between the wall 4 and the duct 5. Furthermore, the friction strip 3 can also be replaced by other types of friction element such as "pads" or

Landscapes

• Engineering & Computer Science (AREA)
• Architecture (AREA)
• Civil Engineering (AREA)
• Structural Engineering (AREA)
• General Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Protection Of Pipes Against Damage, Friction, And Corrosion (AREA)
• Details Of Indoor Wiring (AREA)

Applications Claiming Priority (3)

Publications (1)

Family

ID=20408530

Family Applications (1)

Country Status (5)

Family Cites Families (4)

• 1997
  • 1997-10-08 SE SE9703649A patent/SE510715C2/sv not_active IP Right Cessation
• 1998
  • 1998-09-22 EP EP98946749A patent/EP1019996A1/en not_active Withdrawn
  • 1998-09-22 WO PCT/SE1998/001689 patent/WO1999018644A1/en active Application Filing
  • 1998-09-22 AU AU93699/98A patent/AU9369998A/en not_active Abandoned
• 2000
  • 2000-04-07 NO NO20001820A patent/NO322700B1/no not_active IP Right Cessation

Non-Patent Citations (1)

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