Classifications

• • E—FIXED CONSTRUCTIONS
  • E04—BUILDING
  • E04D—ROOF COVERINGS; SKY-LIGHTS; GUTTERS; ROOF-WORKING TOOLS
  • E04D3/00—Roof covering by making use of flat or curved slabs or stiff sheets
  • E04D3/36—Connecting; Fastening
  • E04D3/3601—Connecting; Fastening of roof covering supported by the roof structure with interposition of a insulating layer
  • E04D3/3603—Connecting; Fastening of roof covering supported by the roof structure with interposition of a insulating layer the fastening means being screws or nails
• • E—FIXED CONSTRUCTIONS
  • E04—BUILDING
  • E04D—ROOF COVERINGS; SKY-LIGHTS; GUTTERS; ROOF-WORKING TOOLS
  • E04D5/00—Roof covering by making use of flexible material, e.g. supplied in roll form
  • E04D5/14—Fastening means therefor
  • E04D5/144—Mechanical fastening means
  • E04D5/145—Discrete fastening means, e.g. discs or clips

Definitions

• the present invention refers to a device for mounting insulation and sealing layer to the outside of a roof and retaining it thereon and incorporating a washer, which is placed on the outside of the sealing laver and is attached to an underlaying fixed part of the roof structure by means of a fixing member, which extends through an opening in the washer, through sealing layer and insulation whereby the washer is provided with first locking means for interlocking with cooperating second locking means arranged in the underside of a covering washer having an unperforated upper surface and a bigger outer size than said washer, which covering washer is intended when mounted to encase said washer between itself and the underlayer.
• a more recent design has used a .washer of a semi-rigid PVC-plastic, whereby the outer periphery of the washer has been glued to the sealing layer, preferably by aid of a liquid PVC-based adhesive.
• the central through-hole for the fixing member has caused leak problems which are difficult to solve, at the same time as it has proven itself that it has been difficult to manufacture the PVC-washers without form defects which show themselves thus that the washers are warping so much that they become wavy instead of being plane. This has a detrimental effect on the washers' ability of giving a tight engagement with its periphery against the sealing layer.
• a washer of PVC-plastic has been provided with a blind hole located in its surface facing the sealing layer, in which blind hole a headless connecting screw has been screwed in, whereupon the connecting member by means of a tool, which is attachable to the outside of the washer, is screwed on to the roof structure and thereby also the washer against the sealing layer and the insulation therebeneath.
• the connecting member by means of a tool, which is attachable to the outside of the washer, is screwed on to the roof structure and thereby also the washer against the sealing layer and the insulation therebeneath.
• the PVC-washer will furthermore tend to yield when subjected to big forces e.g. at strong wind, whereby the leak problem will furthermore increase at the same time as there is risk that the sealing layer will be torn apart at positions where the PVC-plastic cannot maintain its form and secure a sufficient contact
• a fixing device for this purpose it has been used a profiled washer of plastic material which has a central opening for receiving a fixing member.
• This washer is then completed with a protective cap, which is fitted over the washer and which will ascertain that there will be no fluid leakage between the opening of the washer and the fixing member.
• the protective cap is connected to the washer thereby that a peripheral flange at its open end is brought to snap behind an annular groove at the lower edge of the washer.
• the protective cap when mounted must be located at a small distance from the base. This implies risks for leakage in conformity with the above said as the plastic washer as stated above hardly can be manufactured without form defects, either such which will occur immediately at the manufacture or later due to stresses, loads etcetera.
• the present invention has for its purpose to present a device for mounting and retaining insulation and sealing layer to the outside of a roof of the type mentioned hereabove and by the aid of which the above mentioned problems are eliminated, at the same time as the device is reliable and simple both to manufacture and to handle, and this has according to the invention been achieved thereby that the washer consists of a thin, formstable metal washer having through-holes, which define said first interlocking means, whereas the said second means of the covering washer are studformed projections protruding from the underside of the covering washer and being lockable in the holes of the washer, whereby the covering washer when locked to the washer, is intended to be connected to the. sealing layer along its edge projecting outside the washer, e.g. by a glue joint.
• Figure 1 shows in a schematic cross-section a device according to the invention applied to a roof of which a small portion is shown in cross-section
• Figure 2 snows in a planar view and a side view a covering washer forming part of the device according to the invention
• Figure 3 is views corresponding to the views of figure 2 of a washer forming part of the device
• Figure 4 is a view corresponding to figure 1 of another embodiment of the device according to the invention
• Figure 5 is a view corresponding to figure 2 of a covering washer of the device according to figure 4
• Figure 6 shows two views according to figure 3 of the washer forming part of the device according to figure 4.
• FIG 1 a roof beam in the form of a sheet steel profile, which together with other beams carry an insulating mat 2 laid thereupon.
• a sealing layer 3 in the form of a PVC-film, which is secured to the roof beam 1 by means of a connecting member 4 - in the embodiment shown, a screw - which extends through the sealing layer as well as through the insulation.
• the screw 4 also extends through a counter-sunk, central opening ⁇ arranged in a round metal washer 5, which is placed upon the sealing layer 3 and thereby distributes the forces on the screw over a larger area of sealing layer and insulation.
• connecting means 7 formed as two diametrically opposite, mainly keyhole-shaped holes, each having a bigger hole portion 7a and a smaller hole portion 7b continuous with the bigger one. From figure 3 can further be seen how the central opening 6 has a counter-sinking 6a.
• the metal washer 5 is by means of the connecting means 7 locked to a covering washer 8, which is better shown in figure 2.
• the covering washer 8 which has an unper forated upper surface, is at its underside provided with members 9 for interlocking cooperation with the connecting means of the metal washer and these cooperating members are formed as projections or studs located just in front of the holes 7 in the washer 5 and each being designed with a head 9a having a dimension which is somewhat smaller than the dimension of the bigger hole portion 7a in the washer but somewhat bigger than the dimension of the smaller hole portion 7b in the washer 5 , and having a stem portion 9b having a somewhat smaller dimension than the smaller hole portion of the washer.
• a ridge 10 which can be used as a handle or which can form a grip for a tool, whereby the covering washer
• the covering washer 8 has a bigger outer dimention than the washer 5 and before the covering washer has been fitted a curable glue, preferably on PVC-basis, is conveniently applied on the sealing layer 3 or along the periphery of the covering washer 8, whereby a cureing glue joint bond 11 is obtained between the sealing washer, which is preferably made in PVC-plastic, and the sealing layer.
• a curable glue preferably on PVC-basis
• FIGS 4-6 is shown in views corresponding to figures 1-3 a modified embodiment of the device according to the invention with a screw 4, which connects an insulating mass 2 and a sealing layer 3 of PVC-foil to a roof beam 1 during intermediation of a washer 15, provided with a through-hole 16 with a counter-sinking 16a.
• the washer 15 is provided with interconnecting means 17 formed as two diametrically opposite round holes, which cooperate with interlocking members 19 formed in a covering washer 18 of PVC-plastic, each of which members 19 being formed as two peg-parts 19a, 19b which are flexible in direction from each other, and which at their end portions have hook means 19c.
• the outer edge of the sealing cover is preferably connected to the sealing layer at 11, e.g. by heat sealing, glueing or the like.
• the invention offers a simple and efficient mounting device, which has a metal washer as a load carrying element, whereas the plastic covering washer will not have to carry any loads of importance whereby it is not sensible to form defects to the same extent as earlier devices of similar type.

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Architecture (AREA)
• Civil Engineering (AREA)
• Structural Engineering (AREA)
• Roof Covering Using Slabs Or Stiff Sheets (AREA)
• Bolts, Nuts, And Washers (AREA)
• Installation Of Indoor Wiring (AREA)
• Body Structure For Vehicles (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=20337058

Family Applications (1)

Country Status (4)

Families Citing this family (7)

Family Cites Families (4)

• 1979
  • 1979-01-18 SE SE7900455A patent/SE7900455L/sv unknown
• 1980
  • 1980-01-15 WO PCT/SE1980/000012 patent/WO1980001491A1/en not_active Application Discontinuation
  • 1980-01-17 NO NO800108A patent/NO800108L/no unknown
  • 1980-07-29 EP EP80900252A patent/EP0023218A1/en not_active Withdrawn

Non-Patent Citations (1)

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