GB2169051A - Screws for fastening roof or wall liners - Google Patents
Screws for fastening roof or wall liners Download PDFInfo
- Publication number
- GB2169051A GB2169051A GB08531432A GB8531432A GB2169051A GB 2169051 A GB2169051 A GB 2169051A GB 08531432 A GB08531432 A GB 08531432A GB 8531432 A GB8531432 A GB 8531432A GB 2169051 A GB2169051 A GB 2169051A
- Authority
- GB
- United Kingdom
- Prior art keywords
- screw
- threaded portion
- screw head
- diameter
- threaded
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000007787 solid Substances 0.000 claims abstract description 22
- 238000005553 drilling Methods 0.000 claims abstract description 16
- 238000007789 sealing Methods 0.000 claims abstract description 16
- 238000010079 rubber tapping Methods 0.000 claims abstract description 4
- 238000005096 rolling process Methods 0.000 claims description 5
- 230000004323 axial length Effects 0.000 claims 1
- 239000011295 pitch Substances 0.000 description 8
- 229910000831 Steel Inorganic materials 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 4
- 239000010959 steel Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 230000014759 maintenance of location Effects 0.000 description 3
- 230000008093 supporting effect Effects 0.000 description 3
- 230000007704 transition Effects 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 1
- 229910000975 Carbon steel Inorganic materials 0.000 description 1
- 230000001154 acute effect Effects 0.000 description 1
- 229910052796 boron Inorganic materials 0.000 description 1
- VNNRSPGTAMTISX-UHFFFAOYSA-N chromium nickel Chemical class [Cr].[Ni] VNNRSPGTAMTISX-UHFFFAOYSA-N 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
- E04F13/00—Coverings or linings, e.g. for walls or ceilings
- E04F13/07—Coverings or linings, e.g. for walls or ceilings composed of covering or lining elements; Sub-structures therefor; Fastening means therefor
- E04F13/08—Coverings or linings, e.g. for walls or ceilings composed of covering or lining elements; Sub-structures therefor; Fastening means therefor composed of a plurality of similar covering or lining elements
- E04F13/0801—Separate fastening elements
- E04F13/0832—Separate fastening elements without load-supporting elongated furring elements between wall and covering elements
- E04F13/0833—Separate fastening elements without load-supporting elongated furring elements between wall and covering elements not adjustable
- E04F13/0835—Separate fastening elements without load-supporting elongated furring elements between wall and covering elements not adjustable the fastening elements extending into the back side of the covering elements
- E04F13/0837—Separate fastening elements without load-supporting elongated furring elements between wall and covering elements not adjustable the fastening elements extending into the back side of the covering elements extending completely through the covering elements
-
- 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
-
- 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
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B35/00—Screw-bolts; Stay-bolts; Screw-threaded studs; Screws; Set screws
- F16B35/04—Screw-bolts; Stay-bolts; Screw-threaded studs; Screws; Set screws with specially-shaped head or shaft in order to fix the bolt on or in an object
- F16B35/041—Specially-shaped shafts
-
- 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
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B25/00—Screws that cut thread in the body into which they are screwed, e.g. wood screws
- F16B25/10—Screws performing an additional function to thread-forming, e.g. drill screws or self-piercing screws
-
- 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
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B25/00—Screws that cut thread in the body into which they are screwed, e.g. wood screws
- F16B25/10—Screws performing an additional function to thread-forming, e.g. drill screws or self-piercing screws
- F16B25/103—Screws performing an additional function to thread-forming, e.g. drill screws or self-piercing screws by means of a drilling screw-point, i.e. with a cutting and material removing action
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Mechanical Engineering (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Roof Covering Using Slabs Or Stiff Sheets (AREA)
Abstract
A screw (3) having a drilling tip (6), a self-tapping thread (7,8) and a screw head (11) is used for fastening roof or wall-lining elements to a solid substructure (4), said elements comprising profiled sheets (1) and an insulating layer (2) disposed thereunder. The screw has at least two threaded portions (7, 8) with a threadless shank portion (9) situated between them. The mutual distance (A) between the start of thread of the two threaded portions (7, 8) corresponds approximately to the thickness (E) of the roof or wall-lining element to be screw-fastened. Between the threaded portion (8) near the screw head and the screw head (11) a further threadless shank portion (10) is provided, whose length (L) corresponds approximately to the sum of the thickness (P) of the profiled sheets (1) of the roof or wall-lining element and the thickness (D) of a sealing ring (12), in the compressed state, which can be fitted under the screw head (11). <IMAGE>
Description
SPECiFICATION
A screw for fastening roof or wall panelling and lining elements to a solid substructure
The invention relates to a screw for fastening roof or wallpanelling and lining elements to a solid substructure, said elements comprising profiled panels or sheets and an insulating layer disposed thereunder, the screw having a drilling tip, a self-tapping thread and a screw head.
Various embodiments of screws are already known for fastening profiled sheets or panels of this type. According to the density of the insulating layers disposed beneath the profiled sheets, problems arise when loads caused by a person walking thereon or by wind are imposed so that if the known screws are used the sealing rings provided between the screw head and the sheets soon lose their effect and thus a watertight seal is no longer assured. In fact, the use of pressure-sensitive insulating materials in the fastening of roof-lining elements does not allow access to the roof on foot, since the screws inserted in the solid substructure do not yield and they thus remain in position when the profiled sheets are trodden on. The sealing effect in the vicinity of the through-hole for the screw is thereby eliminated.
The subject of the present invention is a screw which enables the profiled sheets forming the upper cover of roof or wall-lining elements to be maintained at a safe distance from the solid substructure, whilst also retaining the sealing action of a sealing ring installed below the screw head even under loads of widely varying nature.
According to the invention two threaded portions with a threadless shank portion situated between them are provided, in which the mutual distance between the start of thread of the two threaded portions corresponds approximately to the thickness, at the fastening point, of the roof or wall-lining element to be screw-fastened, and between the threaded portion near the screw head and the screw head a further threadless shank portion is provided, whose length corresponds approximately to the sum of the thickness of the profiled sheets of a roof or wall-lining element and the thickness of a sealing ring, in the compressed state, which can be fitted under the screw head.
These features enable the profiled sheets of a roof or wall-lining element to be secured at a specified distance from the solid substructure and for these profiled sheets to be protected against loads imposed when they are walked upon, or loads resulting from wind or snow, by the screw itself being maintained in its position. Moreover, even with concentrated loads or alternating loads the sealing action of the sealing ring used can be maintained, because both the profiled sheets and the sealing ring always remain in their clamped position in the threadless shank portion below the screw head.
Embodiments of the invention will now be described by way of example, reference being made to the accompanying drawings, wherein:
Figures 1 to 7 show various embodiments of roof or wall-lining elements with corresponding fastening possibilities;
Figure 8 shows a screw according to the invention on an enlarged scale, and
Figures 9 to 11 show the individual stages of a screw fastening with a screw of this type;
Figure 12 shows another embodiment of a screw; and
Figures 15 to 15 show the individual stages in a screw fastening;
Figure 16 shows a third embodiment of a screw; and
Figures 1 7 to 19 show the individual stages of a screw fastening operation with a screw of this type.
Figures 1 to 7 each shows a roof or walllining element which comprises a profiled sheet 1 and an insulating layer 2 and which is to be fastened by a screw 3 to a solid substructure 4. If the insulating layer 2 consists of low-density mineral fibre insulating boards, particular problems arise in the case of a screw fastening. The screw 3 according to the invention now makes it possible with a single fastener to achieve a secure support and also secure fastening of the profiled sheets at a suitably spaced from the solid substructure 4. This is in fact the case not only when the profiled sheets 1 are supported directly on the insulating layer 2, as evident from Figure 2, but also when the profiled sheets 1 are to be fixed at a corresponding distance from the insulating layer 2.Of course, in the arrangement according to Figure 3 a fastening of this type is only possible if during the fitting of the screw the profiled sheet 1 is maintained at a distance by an auxiliary structure. In a development of this type, the insulation is secured separately to the substructure prior to the provision of the profiled sheets 1.
With the aim of making the whole installation procedure more efficient, the manufacturers of such profiled sheets, e.g. in the form of trapezium-shaped sheet metal courses, have now switched to providing their sectional elements with an insulating layer 2 from the outset. For example, the latter is glued to the profiled sheet 1. The screw 3 can then be inserted either in the raised stiffening corrugation (left-hand side in Figure 5) or in the recessed stiffening corrugation (right-hand side in Figure 5). For reasons of economy, relatively soft insulating layers 2 are also used here. They are very sensitive to pressure. The same applies to the raised stiffening corruga tion of the profiled sheets mostly produced in thin gauges. In any case, considerable importance is attached to the supporting action of the screw 3 but even more to its correct position.In the embodiment according to Figure 6, a foamed insulating layer is applied over the entire surface of the profiled sheet 1 and a further cover sheet 5 is provided on the underside of the roof or wall-lining element.
Usually, the less heavily ribbed side faces towards the interior. In this case too, it is basically possible to discern the raised and recessed stiffening corrugation fastening, as illustrated in Figure 7. This element with enclosing sheet-metal ousides imposes special requirements on the construction of the screw.
Figure 8 now illustrates such an embodiment is provided with a drilling tip 6, two threaded portions 7 and 8, two threadless shank portions 9 and 10 and a screw head 11. One threadless shank portion 9 is provided between the two threaded portions 7 and 8. The second threadless shank portion 10 is provided between the screw head 11 and the threaded portion 8 at the screw-head end. In this case the invention is based on the particular arrangement of the thread start of the two threaded portions 7, 8 and on the length of the threadless portion 10 directly adjacent to the screw head 11. In Figure 8, the reference E denotes the thickness of the roof or wall-lining element consisting of profiled sheets 1 and underlying insulating layer 2. Here it is of no consequence whether or not a free space is to be left between the insulating layer 2 and the profiled sheets J.In any case, this dimension E indicates the position of the profiled sheets 1 with respect to the solid substructure 4.
The mutual distance between the thread starts of the two threaded portions 7, 8 is designated A in the drawing. As will be explained in more detail below, it is very important that the distance A corresponds approximately to the thickness E of the roof or walllining element to be secured at the location of the screw fastening.
Moreover, the length L of the threadless shank portion 10 between the screw head 11 and the threaded portion 8 near the screw head corresponds approximately to the sum of the thickness P of the profiled sheet 1 of the roof or wall-lining element and the thickness D of a sealing ring 12, in the compressed state, which can be inserted under the screw head 11.
The left-hand side of the screw in Figure 8 shows the position of the screw 3 in relation to the solid substructure 4 and the profiled sheet 1, upon commencing to screw in the thread. The completed screw fastening is shown on the right-hand side of Figure 8.
It is evident from this illustration and the indicated special dimensional relationships according to the invention that the second threaded portion 8 can turn freely during the entire screwing operation. When the first threaded portion 7 begins to take hold in the solid substructure 4, the second threaded portion 8 can likewise penetrate into the profiled sheet 1. If a profiled sheet 1 is applied only on one side, the possibility is offered of selecting any pitch desired for the second threaded portion 8. The profiled sheet to be fastened then passes more rapidly in the direction of the screw head than the screw 3 itself penetrates into the solid substructure. It is thus possible for the pitches S1 and S2 of the two threaded portions 7, 8 to be equal or different.
The various modes of fastening according to
Figures 1 to 5 also make it possible, by using a relatively large pitch, for a multiple thread to be adopted for the second threaded portion 8.
It is thereby possible to provide a double or triple support for the profiled sheet 1 at the end of the threaded portion 8. It is thereby also possible for profiled sheets 1 consisting of relatively thin metal sheeting to be fastened in a depression-free and watertight manner.
The screw illustrated in Figure 8 makes it possible to achieve an appreciable reaction force for the profiled sheet 1 even when the two threaded portions 7 and 8 have the same diameter. This is also the case when the diameter of the threadless shank portion 9 between the two threaded portions 7 and 8 is designed to be larger than the root diameter of the two threaded portions 7 and 8 and, in practice, corresponds to the rolling diameter of the screw blank and thus, in practice, to the effective diameter of the thread of the two threaded portions 7 and 8.
The reaction force is sufficient, upon final screwing up, to cause outflow of the sealing ring 12. Conical transition zones 13 between the threaded portions 7 and 8 and the threadless shank portion 9 with a corresponding acute angle, in conjunction with a beadless rolled design, ensure that the profiled sheets 1 can slide without substantial energy losses over that region of the threadless shank portion 9 which has a diameter greater than the root diameter.
In contrast thereto, in the known fasteners an abutment is provided which, nevertheless, allows the screw to turn freely in the profiled sheet. However, no retention is provided if the screw is able to turn freely, the fastening is not watertight from the outset or will lose its water-tightness after the next wind load. No reaction force is provided.
The threadless shank portion 10 could also be termed the free zone below the head and this in conjunction with the supporting thread below the head, namely the threaded portion 8, also enables satisfactory adjustment of the profiled sheets 1 in roof or wall-lining elements to be carried out, when the profiled sheet 1 is gripped in the vicinity of the threadless shank portion 10. The screw according to Figure 8 can then be screwed further in or out as desired. Irregularities in the solid substructure can thus also be accommodated during installation. Only the development according to the invention provides such a possibility.Because in the embodiment shown by way of example the diameter of the threadless shank portion 10 corresponds to the root diameter of the threaded portion near to the screw head, acurate guidance between the screw 3 and the profiled sheet 1 is also ensureed in this region.
As distinct from Figure 8, the screw according to Figure 12 is provided with an abutment 14. The diameter of the threadless shank portion 9 may again have the effective diameter necessary for the rolling of threads. In contrast to the embodiment in Figure 8, the transition from the threaded portion 7 into the threadless shank portion 9 is rolled at a right angle. Therefore, a more secure abutment is formed in the correspondingly thicker substructure 4, in which case penetration into correspondingly thin profiled sheets 1 is read ily possible, without it being necessary for additionally provided wings or intermediate threads to effect any widening. As a result of these measures, the screw 3 according to Figure 12 can be produced at a particularly low cost.The diameter of the threaded portion 8 may have the same diameter as the threaded portion 7, as is the case in the embodiment according to Figure 8, or else, as clearly shown in Figure 12, it may be greater than the diameter of the threaded portion 7. This is also an advantage because it is possible to fasten profiled sheets 1 consisting of thin sheet metal, in which case the thread pitch of the threaded portion 8 may be chosen to be larger and, moreover, is then preferably made with a multiple thread in the threaded portion 8. The abutment shoulder 14 has a dual function. The profiled sheet 1 can thereby be set to a predetermined spacing but is dependent on the alignment of the solid substructure 4.
The sealing of the profiled sheet 1 is ensured by way of a difference between the thread pitches S1 and S2. The profiled sheet 1 is then placed in its end position, namely in the threadless shank portion 10 of the screw 3, so that the screw 3 can be turned further until the threadless shank portion 9 abuts with the abutment shoulder 14 against the solid substructure 4. The screw according to Figure 12 is particularly suitable for fastening operations of the type illustrated in Figures 2, 3 and 5.
Figures 13 to 15 illustrate the stages in a fastening operation using the screw according to Figure 12, wherein it is again apparent that considerable importance is attached to the special mutual dimensional requirements of the screw 3.
The embodiment of a screw 3 according to
Figure 16 is particularly suitable for a fastening of the type shown in Figures 6 and 7. Thus, the roof or wall-lining element here comprises the profiled sheet 1, the insulating layer 2 and a lower cover sheet 5. When this construction is pierced by a screw 3, it has to be taken into account that the thread pitches S1 and
S2 in the threaded portion 7 and in the threaded portion 8 are of the same size. The thread pitch 52 may also be a fraction of a millimetre smaller, whereby this measure can ensure that the composite structure of the entire roof or wall-lining element is not rent apart but in the most extreme case is even slightly compressed. If a lining element of this type is spaced as shown in Figure 17, the boring operation of the screw can readily be started and the tapping operation initiated.
Since before the end of the screwing-in operation the upper profiled sheet 1 encounters the threadless shank portion 10, upon further rotation of the screw 3 the gap between the lining element and the solid substructure 4 can be completely eliminated. Threfore, the possibility of adjustment is again provided here, as already described with respect to the screw according to Figure 12. If no threadless shank portion 10 were to be provided, the fitting operation would have to be completed within fractions of one turn when the profiled sheet 1 has reached its end position in the supporting thread, i.e. in the threaded portion near to the screw head. If the screw were to be turned further, for example so as to tighten further a lining element of this type, the region below the screw head would invevitably turn freely on the outer diameter of the thread.In any case, retention would no longer be provided. A depression will be formed, depending on the size of the gap to be spanned. In that case the watertightness of the sealing ring fitted is no longer assured.
In the screw according to Figure 16, the diameter of the two threaded portions 7 and 8 can be of equal size. However, to improve its action, the diameter of the threaded portion 8 may be made larger than the diameter of the threaded portion 7. However, it should ba noted that the starting diameter of the threaded portion 7 is converted by rolling, at an angle a, namely to the rolling diameter and thus to the diameter of the threadless portion 9. In this way it is possible to penetrate the upper profiled sheet 1 without the assistance of enlarging wings and the like. In another stage a transition can be made into an enlarged diameter of the threaded portion 8.The radial loads created thereby in the profiled sheet 1 additionally improve the retention capacity so that, after the profiled sheet 1 passes over into the threadless shank portion 10 of the screw 3, satisfactory contact and thus good support at the end of the threaded portion 8 is ensured.
The diameter of the threaded portion 7, namely the threaded portion 7 at the drilling tip end, may be relatively small so as to ensure that, upon tightening the screw relative to the gap present between the lining element and the solid substructure 4, the thread is overtightened in the vicinity of the lower cover sheet 5 of the lining element. Additionally, the smaller diameter of the threaded portion 7 at the drilling tip end also serves to provide a more flexible screw 3. This is particularly important for accommodating the thermal expansion of the outer profiled sheets X without the screw breaking.
Whereas self-drilling screws are normally made of simple carbon steels, at most alloyed with boron, which exhibit low ductility, an al loyed case hardening steel is especially suitable for a screw according to Figure 16. For example, a 14NiCr14 steel is applicable here.
In addition to this chromium-nickel steel, also known 18/8 steels are quite satisfactory.
However, these austenitic stainless steels necessitate a special drilling configuration, e.g.
with a cutting insert consisting of a different material.
In the screws according to Figures 8 and 16 there is also provision for the threaded portion 7 at the drilling tip end to be made approximately twice as long as the threaded portion 8 near the screw head. Accordingly, even after the threaded portion 8 has penetrated through the profiled sheets 1, more reliable thread engagement of the threaded portion 7 in the solid substructure 4 can be ensured.
Of course, within the scope of the invention a very wide variety of embodiments and embodiment combinations are possible which have not been described individually. Thus, mutual coordination of the diameters of the threaded portions 7, 8 and of the threadless portions 9, 10 respectively can be effected for special applications or for production reasons.
The choice of thread pitches in the two threaded portions 7 and 8 can also be selected in accordance with certain applications.
Therefore, it is especially important for a screw for use in this special instance of fastening to provide a threadless shank portion between the two threaded portions 7 and 8 so that the boring operation of the screw can take place in the solid substructure 4, without a thread then being operative in the profiled sheet 1. Moreover, it is essential that the two threaded portions 7 and 8 tap into the solid substructure 4 and into the profiled sheet 1 at approximately the same time. The particular dimensions of the threadless shank portion 10 between the screw head 11 and the end of the threaded portion 8 near the screw head are of considerable importance for the support of the profiled sheet 1 after the screwing operation and for a durable sealing action of the sealing ring 12.
Throughout the foregoing description of the expression profiled sheets 1 has been used, which form a part of the roof or wall-lining elements. Profiled sheets or panels are usually employed for such purposes. Of course, the screws according to the invention can also be used if sheets or panels without any profiling are used in place of profiled sheets 1.
Claims (11)
1. A screw for fastening roof or wall panelling and lining elements to a solid substructure, said elements comprising profiled panels or sheets and an insulating layer disposed thereunder, the screw having a drilling tip, a self-tapping thread and a screw head wherein two threaded portions with a threadless shank portion situated between them are provided, in which the mutual distance between the start of thread of the two threaded portions corresponds approximately to the thickness, at the fastening point, of the roof or wall-lining element to be screw-fastened, and between the threaded portion near the screw head and the screw head a further threadless shank portion is provided, whose length corresponds approximately to the sum of the thickness of the profiled sheets of a roof or wall-lining element and the thickness of a sealing ring, in the compressed state, which can be fitted under the screw head.
2. A screw according to Claim 1, wherein the threaded portion near the screw head has a larger diameter than the threaded portion at the drilling tip end.
3. A screw according to Claim 1 and/or 2, wherein the thread pitch of the threaded portion near the screw head is greater than the thread pitch of the threaded portion at the drilling tip end.
4. A screw according to Claim 1 and/or 2, wherein the thread pitch in the threaded portion near the screw head is smaller than the thread pitch in the threaded portion at the drilling tip end.
5. A screw according to Claims 1 to 4, wherein the threaded portion near the screw head is in the form of a multiple thread.
6. A screw according to Claim 1, wherein the diameter of the threadless shank portion between the screw head and the threaded portion near the screw head corresponds to the root diameter of the threaded portion near the screw head.
7. A screw according to any preceding
Claim, wherein the diameter of the threadless shank portion between the threaded portions is larger than the root diameter of the threaded portions and, preferably, corresponds to the rolling diameter of the screw blank.
8. A screw according to any preceding
Claim, the threaded portion at the drilling tip end is approximately twice as long as the threaded portion near the screw head.
9. A screw according to any preceding
Claim, wherein the root diameter of the threaded portion near the screw head corre sponds to the diameter of all the threadless shank portions but is larger than the root diameter of the threaded portion at the drilling tip end and larger than the bore diameter.
10. A screw according to Claim 9, wherein an abutment shoulder is formed between the threaded portion at the drilling tip end and the threadless shank portion of larger diameter, the thread pitch of the threaded portion near the screw head is greater than the thread pitch of the threaded portion at the drilling tip end, and the two threaded portions have approximately the same axial length.
11. A screw for fastening roof or wall panelling and lining elements to a solid substructure substantially as herein described with reference to and as shown in the accompanying drawings.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AT408584A AT380732B (en) | 1984-12-21 | 1984-12-21 | SCREW FOR FASTENING ROOF OR WALL CLADDING ELEMENTS OF PROFILED PANELS AND INSULATING LAYER UNDER THEREOF ON A FIXED BASE |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| GB8531432D0 GB8531432D0 (en) | 1986-02-05 |
| GB2169051A true GB2169051A (en) | 1986-07-02 |
| GB2169051B GB2169051B (en) | 1988-05-25 |
Family
ID=3559460
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB08531432A Expired GB2169051B (en) | 1984-12-21 | 1985-12-20 | Screws for fastening roof or wall liners |
Country Status (2)
| Country | Link |
|---|---|
| AT (1) | AT380732B (en) |
| GB (1) | GB2169051B (en) |
Cited By (20)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE8804654U1 (en) * | 1988-04-08 | 1988-08-11 | Adolf Würth GmbH & Co. KG, 74653 Künzelsau | Self-drilling screw |
| DE3740460A1 (en) * | 1987-11-28 | 1989-06-08 | Wuerth Adolf Gmbh & Co Kg | Self-drilling screw |
| GB2251666A (en) * | 1990-11-02 | 1992-07-15 | Council Scient Ind Res | "Screws for roofing sheets" |
| DE4237019A1 (en) * | 1992-11-02 | 1994-05-05 | Sfs Stadler Holding Ag Heerbru | Connection between two or more profile elements or between assembly parts and one or more profile elements |
| DE9417920U1 (en) * | 1994-11-09 | 1995-01-05 | Gehring, Manfred, Dr., 72250 Freudenstadt | Screw for fastening ridge tiles |
| WO1999031395A1 (en) * | 1997-12-16 | 1999-06-24 | Sfs Industrie Holding Ag | Screw for fixing the distance of covering plates or rails in a substructure |
| NL1011531C2 (en) * | 1999-03-11 | 2000-09-14 | Rockwool Lapinus Bv | Bolt connection for cassette construction. |
| DE29910962U1 (en) * | 1999-06-23 | 2000-11-02 | Fischer Artur Werke Gmbh | Fastening device for connecting frame profiles |
| WO2001042669A1 (en) * | 1999-12-10 | 2001-06-14 | Sfs Intec Holding Ag | Bolt for fixing, at a distance, covering plates or rails on a substructure |
| WO2001081773A1 (en) * | 2000-04-20 | 2001-11-01 | Ammann, Wolf | Wood screw |
| EP1207243A1 (en) * | 2000-11-16 | 2002-05-22 | Hans-Jürgen Koch | Device and method of securing a roofing sheet |
| EP1179645A3 (en) * | 1997-08-07 | 2002-12-11 | Saint-Gobain Isover | Wall panel |
| GB2397105A (en) * | 2003-01-07 | 2004-07-14 | Altenloh Brinck & Co | Self tapping screw having two threads of differing pitch |
| US7037059B2 (en) | 2003-01-07 | 2006-05-02 | Altenloh, Brinck Co. Gmbh & Co. Kg | Self-tapping screw for composite materials |
| US7255523B2 (en) | 2005-12-22 | 2007-08-14 | Prime Source Building Products, Inc. | Dual threaded screw for composite materials |
| ITMO20100138A1 (en) * | 2010-05-05 | 2011-11-06 | C M C S R L Off | FIXING SYSTEM OF STRUCTURAL ELEMENTS, IN PARTICULAR FOR MACHINE PROTECTION. |
| CN107816172A (en) * | 2017-11-07 | 2018-03-20 | 安徽三宝钢结构股份有限公司 | A kind of bridging arrangement of roof composite board |
| EP2930378B1 (en) | 2014-04-11 | 2018-12-26 | EJOT Baubefestigungen GmbH | Spacer fixing element |
| EP3851608A2 (en) | 2020-01-17 | 2021-07-21 | Onduline | Method for manufacturing a roof covering of a building and set of adapted elements |
| WO2021244787A1 (en) * | 2020-06-05 | 2021-12-09 | Ejot Baubefestigungen Gmbh | Sloping insulation screw having a right-hand thread drill tip and a left-hand thread for adjustable fixing of a roof covering web on a steel sheet |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AT388409B (en) * | 1987-09-17 | 1989-06-26 | Sfs Stadler Ag | DEVICE FOR FASTENING ROOF COATINGS ON SOFT INSULATING MATERIAL ON A FIXED BASE |
| EP0319812A1 (en) * | 1987-11-28 | 1989-06-14 | Adolf Würth GmbH & Co. KG | Self-drilling screw |
| FR2676244B1 (en) * | 1991-05-07 | 1994-01-28 | Francis Ovaert | COMPOSITE STRUCTURE, ESPECIALLY FOR THE BUILDING. |
| DE4435837A1 (en) * | 1994-10-07 | 1996-04-11 | Rheinhold & Mahla Ag | Method for fixing cladding panels to building structures |
| EP2662506A3 (en) * | 2012-04-13 | 2017-04-05 | Peter Würz | Spacer for mounting profile plates made of fibre cement, bitumen, metal and plastic |
| DE102014003761B4 (en) * | 2014-03-03 | 2017-08-17 | Matthias Heidenreich | Fixing device for sheets of metal facades and roofs |
| CN111945993A (en) * | 2020-08-07 | 2020-11-17 | 东莞格美智宅建筑装饰有限公司 | Laying method of medium-large-sized wall tiles |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1270545A (en) * | 1968-12-05 | 1972-04-12 | Illinois Tool Works | Screws |
| GB1277044A (en) * | 1968-09-09 | 1972-06-07 | Illinois Tool Works | Screw-type fasteners |
| GB1346786A (en) * | 1970-06-02 | 1974-02-13 | Illinois Tool Works | Threaded fasteners with stabilizing threads |
| GB2130327A (en) * | 1982-11-20 | 1984-05-31 | Clan Contracting Ltd | Ties for building structures |
| GB2142108A (en) * | 1983-06-22 | 1985-01-09 | Sfs Stadler Ag | Fastener for securing roofing sheeting over soft insulating material to a fixed support |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4012885A (en) * | 1975-03-03 | 1977-03-22 | King John O Jun | Reverse taper fastener system |
| GB1522557A (en) * | 1975-08-21 | 1978-08-23 | Monogram Ind Inc | Multiple sleeve blind fastener |
-
1984
- 1984-12-21 AT AT408584A patent/AT380732B/en not_active IP Right Cessation
-
1985
- 1985-12-20 GB GB08531432A patent/GB2169051B/en not_active Expired
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1277044A (en) * | 1968-09-09 | 1972-06-07 | Illinois Tool Works | Screw-type fasteners |
| GB1270545A (en) * | 1968-12-05 | 1972-04-12 | Illinois Tool Works | Screws |
| GB1346786A (en) * | 1970-06-02 | 1974-02-13 | Illinois Tool Works | Threaded fasteners with stabilizing threads |
| GB2130327A (en) * | 1982-11-20 | 1984-05-31 | Clan Contracting Ltd | Ties for building structures |
| GB2142108A (en) * | 1983-06-22 | 1985-01-09 | Sfs Stadler Ag | Fastener for securing roofing sheeting over soft insulating material to a fixed support |
Cited By (25)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3740460A1 (en) * | 1987-11-28 | 1989-06-08 | Wuerth Adolf Gmbh & Co Kg | Self-drilling screw |
| DE8804654U1 (en) * | 1988-04-08 | 1988-08-11 | Adolf Würth GmbH & Co. KG, 74653 Künzelsau | Self-drilling screw |
| GB2251666A (en) * | 1990-11-02 | 1992-07-15 | Council Scient Ind Res | "Screws for roofing sheets" |
| AU649736B2 (en) * | 1990-11-02 | 1994-06-02 | Council Of Scientific And Industrial Research | Roof screw |
| DE4237019A1 (en) * | 1992-11-02 | 1994-05-05 | Sfs Stadler Holding Ag Heerbru | Connection between two or more profile elements or between assembly parts and one or more profile elements |
| DE9417920U1 (en) * | 1994-11-09 | 1995-01-05 | Gehring, Manfred, Dr., 72250 Freudenstadt | Screw for fastening ridge tiles |
| EP1179645A3 (en) * | 1997-08-07 | 2002-12-11 | Saint-Gobain Isover | Wall panel |
| WO1999031395A1 (en) * | 1997-12-16 | 1999-06-24 | Sfs Industrie Holding Ag | Screw for fixing the distance of covering plates or rails in a substructure |
| NL1011531C2 (en) * | 1999-03-11 | 2000-09-14 | Rockwool Lapinus Bv | Bolt connection for cassette construction. |
| DE29910962U1 (en) * | 1999-06-23 | 2000-11-02 | Fischer Artur Werke Gmbh | Fastening device for connecting frame profiles |
| WO2001042669A1 (en) * | 1999-12-10 | 2001-06-14 | Sfs Intec Holding Ag | Bolt for fixing, at a distance, covering plates or rails on a substructure |
| WO2001081773A1 (en) * | 2000-04-20 | 2001-11-01 | Ammann, Wolf | Wood screw |
| EP1207243A1 (en) * | 2000-11-16 | 2002-05-22 | Hans-Jürgen Koch | Device and method of securing a roofing sheet |
| GB2397105A (en) * | 2003-01-07 | 2004-07-14 | Altenloh Brinck & Co | Self tapping screw having two threads of differing pitch |
| GB2397105B (en) * | 2003-01-07 | 2005-03-02 | Altenloh Brinck & Co | Self-tapping screw for composite materials |
| US7037059B2 (en) | 2003-01-07 | 2006-05-02 | Altenloh, Brinck Co. Gmbh & Co. Kg | Self-tapping screw for composite materials |
| US7255523B2 (en) | 2005-12-22 | 2007-08-14 | Prime Source Building Products, Inc. | Dual threaded screw for composite materials |
| ITMO20100138A1 (en) * | 2010-05-05 | 2011-11-06 | C M C S R L Off | FIXING SYSTEM OF STRUCTURAL ELEMENTS, IN PARTICULAR FOR MACHINE PROTECTION. |
| EP2930378B1 (en) | 2014-04-11 | 2018-12-26 | EJOT Baubefestigungen GmbH | Spacer fixing element |
| EP2930378B2 (en) † | 2014-04-11 | 2022-01-26 | EJOT Baubefestigungen GmbH | Spacer fixing element |
| CN107816172A (en) * | 2017-11-07 | 2018-03-20 | 安徽三宝钢结构股份有限公司 | A kind of bridging arrangement of roof composite board |
| EP3851608A2 (en) | 2020-01-17 | 2021-07-21 | Onduline | Method for manufacturing a roof covering of a building and set of adapted elements |
| FR3106351A1 (en) * | 2020-01-17 | 2021-07-23 | Onduline | A method of making a roof covering for a building and a set of suitable elements. |
| EP3851608A3 (en) * | 2020-01-17 | 2021-09-22 | Onduline | Method for manufacturing a roof covering of a building and set of adapted elements |
| WO2021244787A1 (en) * | 2020-06-05 | 2021-12-09 | Ejot Baubefestigungen Gmbh | Sloping insulation screw having a right-hand thread drill tip and a left-hand thread for adjustable fixing of a roof covering web on a steel sheet |
Also Published As
| Publication number | Publication date |
|---|---|
| ATA408584A (en) | 1985-11-15 |
| GB2169051B (en) | 1988-05-25 |
| GB8531432D0 (en) | 1986-02-05 |
| AT380732B (en) | 1986-06-25 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PCNP | Patent ceased through non-payment of renewal fee |
Effective date: 19931220 |