GB2033524A - Fixing plug for masonry - Google Patents
Fixing plug for masonry Download PDFInfo
- Publication number
- GB2033524A GB2033524A GB7936148A GB7936148A GB2033524A GB 2033524 A GB2033524 A GB 2033524A GB 7936148 A GB7936148 A GB 7936148A GB 7936148 A GB7936148 A GB 7936148A GB 2033524 A GB2033524 A GB 2033524A
- Authority
- GB
- United Kingdom
- Prior art keywords
- plug
- masonry
- bore
- fastening element
- injection
- 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
- 239000000463 material Substances 0.000 claims abstract description 9
- 239000002991 molded plastic Substances 0.000 claims abstract description 8
- 238000004873 anchoring Methods 0.000 claims description 4
- 230000002028 premature Effects 0.000 abstract description 6
- 238000003780 insertion Methods 0.000 description 6
- 230000037431 insertion Effects 0.000 description 6
- 239000011324 bead Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000001746 injection moulding Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
Classifications
-
- 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
- F16B13/00—Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose
- F16B13/12—Separate metal or non-separate or non-metal dowel sleeves fastened by inserting the screw, nail or the like
- F16B13/124—Separate metal or non-separate or non-metal dowel sleeves fastened by inserting the screw, nail or the like fastened by inserting a threaded element, e.g. screw or bolt
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Joining Of Building Structures In Genera (AREA)
- Portable Nailing Machines And Staplers (AREA)
- Dowels (AREA)
Abstract
A fixing plug 1 formed of injection- moulded plastics material and having a flange 11 for engaging an article 6 to be secured to masonry 7 when the plug is inserted into a hole 8 in the masonry 7, comprises a longitudinal bore having two portions 3, 3a, the narrower portion 3a being formed in the expandable lower portion of the plug, the bore portions 3, 3a being separated by a transverse web 10 of injection-moulded plastics material, to prevent a screw nail 4 being prematurely inserted too far into the plug 1 causing premature expansion of the plug 1. <IMAGE>
Description
plug occurs directly after the web has been punctured. This ensures the maintenance of the tensile stress conveyed from the flange of the plug to the article to be fastened.
A fixing plug and a fastening element for insertion into the plug, the plug and element being constructed in accordance with the invention will now be described, by way of example only, with reference to the accompanying drawing the single figure of which shows an elevation of the plug partly in section the plug having been inserted in a hole in masonry and the fastening element having been partially inserted in the plug.
Referring to the accompanying drawing the fixing plug, indicated generally by the numeral 1, comprises a cylindrical body 2 made of injection-moulded plastics material which has been inserted in a cylindrical drilled hole 8 in masonry 7 (which may, for example, be a wall).
The plug body 2 has a cylindrical bore extending between its ends, the bore having a portion 3 for initially receiving the fastening element 4 and another portion 3a (shown in broken lines) of smaller diameter (which preferably tapers towards the insertion end of the plug). The two bore portions are separated by a transverse web of injection-moulded plastics material 10.
The wall of that part of the plug defining the smaller diameter bore portion 3a (shown in broken lines) is provided with a longitudinal slot 12 which divides that part into two halves.
The insertion end portion of the plug is formed on its outer surface with notches 13 which improve the anchoring effect of the plug in the hole 8.
The other end of the plug is provided with a flange 11 which is engageable with an article 6 (for example a building panel) when the plug is inserted into the hole 8.
Priorto insertion of the plug into the hole 8 a fastening element 4 having a threaded portion 5 is inserted into the bore portion 3. The outer diameter of the fastening element 4 is slightly greater than that of the bore portion 3 of the plug and consequently the fastening element 4 is held firmly in position. In fact, the fastening element can be inserted into the bore portion 3 of the plug prior to leaving the factory and can be sold as a unit.
To fasten the article 6 against the face of the masonry 7 a bore is provided in the article through which the plug is passed and then inserted into the bore 8 in the masonry. If not already in position the fastening element 4 is then inserted into the bore portion 3 of the plug until the tip of the fastening element 9 engages the web 10. By striking the head 14 of the fastening elementthe plug can be fully inserted into the bore 8, even if that bore is too narrow because it has been drilled by a worn drill, without premature expansion of the plug. Premature expansion is prevented by the web 10 which prevents the fastening element passing into the smaller diameter bore 3a of the plug during this initial insertion process.
When the plug has been fully inserted the flange 11 engages against the outer surface of the article 6 and clamps it between the flange and the face of the
SPECIFICATION
Improvements in and relating to a fixing plug for masonry
This invention relates to a fixing plug for masonry.
The present invention provides a fixing plug formed of injection-moulded plastics material, the plug having a flange for engaging an article to be secured to masonry when the plug is inserted into a hole in the masonry, an expandable portion for anchoring the plug in the hole, and a longitudinal aperture having two portions, one portion being formed in the expandable portion of the plug and having a transverse dimension which is smaller than that of the other portion, wherein the two portions of the aperture are separated by a transverse web of injection-moulded plastics material.
The present invention also reiates to a fastening means comprising a screw nail and a plastics plug which has a flange causing the bracing of the object to be fastened and an inner bore receiving the screw nail and becoming a narrowed portion in the area of the expandable portion.
Fastening means of this type are used for the rapid mounting of objects. Since the lengths of the screw nail and the plug must be matched, such elements are generally marketed as units ready for mounting, i.e. with the screw nail inserted in the plug. In the case of bores that are too narrow it may happen that, when the fastening element is driven in, the screw nail expands the plug prematurely and thus renders correct anchoring impossible. In order to avoid this in a known fastening member there is provided in the screw nail a circular groove which is engaged by a bead arranged in the inner bore of the plug. This manner of fastening the screw nail in the plug has the disadvantage, however, that both the screw nail and the plug must be provided with engageable means to prevent premature expansion of the plug.
Furthermore, after the bead and groove disengage, the plug expands in the area of the bead and this results in undesirable radial wedging of the article (which may be a building component such as a panel) to be fastened.
The aim of the present invention is to avoid the above-mentioned disadvantages.
This is achieved according to the present invention by arranging in the region where the inner bore becomes a narrowed portion an injection-moulded web that splits open when the screw nail is driven in.
The web, which can be readily formed by injection-moulding, prevents premature insertion of the
Mail and hence premature expansion of the plug, and no means are required on the nail for that purpose.
By repeatedly striking the screw nail, it can be driven into the bore, even a relatively narrow bore, so that the flange of the plug comes in contact with the outer surface of the article to be fastened. By striking hard, the tip of the screw nail if forced through the injection-moulded web and, because of the resulting increased thrust, the article to be fastened is braced against the masonry by the flange of the plug.
Because the injection-moulded web is arranged in the area of the narrowed portion, expansion of the masonry 7.
In order now to effect expansion of the plug the fastening element 4 is driven through the web 10 so that its tip penetrates into the narrower diameter bore portion of the plug. As the fastening element penetrates through this portion of the plug the two halves defined by the longitudinal slot are expanded outwardly away from each other so that the plug is anchored in the bore 8.
The thrust necessary to penetrate through the web 10 is imparted to the flange 11 so that the article 6 is firmly clamped between that flange and the face of the masonry 7. When the fastening element 4 has been driven completely home the article 6 is held under tension between the head 14 of the fastening element 4 and the expanded portion of the plug 2.
The head 14 of the fastening element 4 is provided with a slot 15 which may be cruciform, which because the fastening has a threaded portion 5 allows the element to be unscrewed from the plug if it is necessary subsequently to release the article 6.
In effect therefore the fastening element 4 is a combined nail and screw.
As described above, the plug has a reduced diameter bore portion 3a. That is preferred because the plug can then be used in hard or soft masonry, the bore portion 3a serving to guide the fastening element 4 and prevent, especially in very hard masonry, twisting and rupture of the slotted halves of the plug. However, the portion 3a of the plug bore can be omitted and, in that case, the plug is still suitable for most masonry materials except those which are very hard.
Claims (8)
1. A fixing plug formed of injection-moulded plastics material, the plug having a flange for engaging an article to be secured to masonry when the plug is inserted into a hole in the masonry, an expandable portion for anchoring the plug in the hole, and a longitudinal aperture having two portions, one portion being formed in the expandable portion of the plug and having a transverse dimension which is smaller than that of the other portion, wherein the two portions of the aperture are separated by a transverse web of injection-moulded plastics material.
2. Afixing plug as claimed in claim 1, in which one portion of the aperture comprises a longitudinal bore and the other portion a longitudinal slot, the slot being formed in the expandable portion and having a width which is smaller than the diameter of the bore.
3. Afixing plug as claimed in claim 1, in which the aperture comprises a longitudinal bore having a reduced diameter portion in the expandable portion ofthe plug.
4. Afixing plug as claimed in claim 3, in which the expandable portion has a longitudinal slot.
5. A fixing plug substantially as hereinbefore described with reference to, and as illustrated by the accompanying drawing.
6. The combination of a fixing plug as claimed in any one of claims 1 to 5, and a fastening element for driving into the plug aperture, the element being such that it breaks through the web when it is driven in.
7. The combination as claimed in claim 6, in which the fastening element is capable of being screwed out of the plug after it has been driven in.
8. The combination as claimed in claim 6 or claim 7, the fastening element being substantially as hereinbefore described with reference to, and as illustrated by the accompanying drawing.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE7831122 | 1978-10-19 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB2033524A true GB2033524A (en) | 1980-05-21 |
| GB2033524B GB2033524B (en) | 1983-03-02 |
Family
ID=6696157
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB7936148A Expired GB2033524B (en) | 1978-10-19 | 1979-10-18 | Fixing plug for masonry |
Country Status (10)
| Country | Link |
|---|---|
| AT (1) | AT369143B (en) |
| BE (1) | BE879483A (en) |
| BR (1) | BR7906626A (en) |
| CH (1) | CH640612A5 (en) |
| DK (1) | DK435879A (en) |
| ES (1) | ES246075Y (en) |
| FR (1) | FR2439325A1 (en) |
| GB (1) | GB2033524B (en) |
| IT (1) | IT1123789B (en) |
| NL (1) | NL7907036A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2118660A (en) * | 1982-03-19 | 1983-11-02 | R L Bureau D Etudes Et De Rech | Screw-receiving wall plug |
| EP0123366A1 (en) * | 1983-04-25 | 1984-10-31 | J.H. De Wit En Zonen B.V. | Hammer plug |
| US4602902A (en) * | 1981-06-24 | 1986-07-29 | Hilti Aktiengesellschaft | Expansion dowel assembly |
| FR2640657A1 (en) * | 1988-12-21 | 1990-06-22 | Itw De France | Article intended to be fixed on a thick wall, for example a masonry wall |
| FR2657113A1 (en) * | 1990-01-15 | 1991-07-19 | Bandera Robert | Fastening for swinging wings hinge |
| GB2243426A (en) * | 1990-04-27 | 1991-10-30 | Ingersoll Rand Co | Coupling for anchor rod and sleeve |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3482482A (en) * | 1968-07-26 | 1969-12-09 | Usm Corp | Drive anchor fastening devices |
| DE2607338C2 (en) * | 1976-02-23 | 1986-01-09 | Hilti Ag, Schaan | Knock-in dowel with expansion sleeve and expansion element |
-
1979
- 1979-09-20 FR FR7923450A patent/FR2439325A1/en active Pending
- 1979-09-21 NL NL7907036A patent/NL7907036A/en not_active Application Discontinuation
- 1979-09-24 CH CH858379A patent/CH640612A5/en not_active IP Right Cessation
- 1979-10-09 ES ES1979246075U patent/ES246075Y/en not_active Expired
- 1979-10-09 AT AT0657679A patent/AT369143B/en not_active IP Right Cessation
- 1979-10-10 IT IT7926379A patent/IT1123789B/en active
- 1979-10-15 BR BR7906626A patent/BR7906626A/en unknown
- 1979-10-16 DK DK435879A patent/DK435879A/en unknown
- 1979-10-18 GB GB7936148A patent/GB2033524B/en not_active Expired
- 1979-10-18 BE BE0/197699A patent/BE879483A/en not_active IP Right Cessation
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4602902A (en) * | 1981-06-24 | 1986-07-29 | Hilti Aktiengesellschaft | Expansion dowel assembly |
| GB2118660A (en) * | 1982-03-19 | 1983-11-02 | R L Bureau D Etudes Et De Rech | Screw-receiving wall plug |
| EP0123366A1 (en) * | 1983-04-25 | 1984-10-31 | J.H. De Wit En Zonen B.V. | Hammer plug |
| FR2640657A1 (en) * | 1988-12-21 | 1990-06-22 | Itw De France | Article intended to be fixed on a thick wall, for example a masonry wall |
| FR2657113A1 (en) * | 1990-01-15 | 1991-07-19 | Bandera Robert | Fastening for swinging wings hinge |
| GB2243426A (en) * | 1990-04-27 | 1991-10-30 | Ingersoll Rand Co | Coupling for anchor rod and sleeve |
| GB2243426B (en) * | 1990-04-27 | 1993-12-01 | Ingersoll Rand Co | Coupling for anchor rod and sleeve |
Also Published As
| Publication number | Publication date |
|---|---|
| IT7926379A0 (en) | 1979-10-10 |
| NL7907036A (en) | 1980-04-22 |
| FR2439325A1 (en) | 1980-05-16 |
| ES246075Y (en) | 1980-07-01 |
| GB2033524B (en) | 1983-03-02 |
| BR7906626A (en) | 1980-05-27 |
| BE879483A (en) | 1980-02-15 |
| IT1123789B (en) | 1986-04-30 |
| ATA657679A (en) | 1982-04-15 |
| DK435879A (en) | 1980-04-20 |
| CH640612A5 (en) | 1984-01-13 |
| AT369143B (en) | 1982-12-10 |
| ES246075U (en) | 1980-01-16 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PCNP | Patent ceased through non-payment of renewal fee |