IE49200B1 - Wall ties and methods of manufacturing wall ties - Google Patents
Wall ties and methods of manufacturing wall tiesInfo
- Publication number
- IE49200B1 IE49200B1 IE205379A IE205379A IE49200B1 IE 49200 B1 IE49200 B1 IE 49200B1 IE 205379 A IE205379 A IE 205379A IE 205379 A IE205379 A IE 205379A IE 49200 B1 IE49200 B1 IE 49200B1
- Authority
- IE
- Ireland
- Prior art keywords
- tie
- wall
- wall tie
- metal
- holes
- Prior art date
Links
- 238000000034 method Methods 0.000 title claims abstract description 17
- 238000004519 manufacturing process Methods 0.000 title claims description 6
- 239000002184 metal Substances 0.000 claims abstract description 21
- 229910052751 metal Inorganic materials 0.000 claims abstract description 21
- 239000004570 mortar (masonry) Substances 0.000 claims abstract description 5
- 239000000463 material Substances 0.000 claims abstract description 3
- 238000003825 pressing Methods 0.000 claims description 7
- 238000005520 cutting process Methods 0.000 claims description 5
- 230000000737 periodic effect Effects 0.000 claims description 4
- 238000004080 punching Methods 0.000 claims description 3
- 229910001209 Low-carbon steel Inorganic materials 0.000 abstract description 3
- 239000011810 insulating material Substances 0.000 abstract description 3
- 238000004873 anchoring Methods 0.000 abstract 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005246 galvanizing Methods 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/38—Connections for building structures in general
- E04B1/41—Connecting devices specially adapted for embedding in concrete or masonry
- E04B1/4178—Masonry wall ties
- E04B1/4185—Masonry wall ties for cavity walls with both wall leaves made of masonry
Abstract
Each end of a wall tie (3) comprises a flat finger of material provided with one or more holes (4). In use, mortar flows into the holes (4) thereby anchoring the tie (3) in position. The tie (3) may also comprise a vertical twist (5) to prevent moisture flow along the tie (3) and a pin or stud to retain insulating material against a leaf of a cavity wall. In the method, a coil of mild steel is mounted on a decoiler, its free end is fed by a pneumatic feed, whose stroke is equal to the length of a wall tie, to a straightener and then to a press containing a die set which operates to pierce the holes in the metal and to subsequently guillotine the metal into lengths.
Description
The present invention relates to wall ties and to methods of manufacturing wall ties.
Wall ties are devices which are used to hold in spaced apart relationship the two leaves of a cavity wall. Each end of the wall tie is embedded in a bed joint in a leaf of the cavity wall and the wall tie serves to hold the two leaves in that relationship.
A large number of different types of wall tie is known.
One conventional wall tie comprises a strip of metal having bifurcated ends. Wall ties having bifurcated ends have been found to be particularly successful in that the ends of the tie are anchored firmly in the bed joints. However, the manufacture of metal wall ties having bifurcated ends requires manual methods or involves considerable wastage of metal.
The invention provides a method of manufacturing metal wall ties comprising the following steps:
(a) performing a pressing operation at periodic intervals along a length of metal; and (b) cutting the metal into strips of predetermined size, each end of each strip being adapted, as a result of the pressing operation at step (a), to be anchored in mortar. Advantageously, the pressing operation at step (a) comprises a punching operation.
The invention also provides a wall tie each end of which comprises a flat finger of material provided with one or more holes.
The invention will now be described more particularly 5 with reference to the accompanying drawings. In the drawings:
Figure 1 is a plan view of a wall tie in the position which it would occupy when located between the two leaves of a cavity wall; and
Figure 2 is a side view of the wall tie shown in
Figure 1.
The method of manufacture will now be described. A coil of mild steel is mounted upon a decoiler and the free end of the coil is passed through a straightener to a pneumatic feed unit which is capable of drawing the steel from the coil through the straightener. The stroke of the pneumatic feed unit is equal to the length of wall tie 3. From the feed unit the continuous strip passes into a crank operated press containing a die set. The pneumatic feed is activated during every up-stroke of the ram of the press.
The die set used to form wall tie 3 is provided with three distinct forming stations, each of which performs a forming operation on every down-stroke of the ram. The first station is provided with six punches which pierce a row of six holes simultaneously.
The second station consists of a punch and die each of which is provided with a roller, the rollers being mutually offset by a distance equal to the radius of a roller plus the thickness of the strip metal. When the die set is fully closed the punch roller lies below the die roller. The arrangement of the second station provides for a twisting operation to be executed.
The face of each roller is radiused so as to reduce drag during the forming operation.
The third station is provided with a cutting tool which cuts the strip metal into equal lengths, each length forming a wall tie. Tne cutting tool cuts the strip metal between the third and fourth holes of the row of six holes.
It will be appreciated that the method outlined above is carried out in an automated manner. In addition, the periodic times of the press and cutting tool and the speed of uncoiling are so arranged that substantially all of the metal from the coil of metal is utilized, the only wastage being .the metal discs pierced from the strip to produce the circular holes
The wall ties 3 are then zinc galvanized to inhibit the formation of rust. Galvanizing takes place immediately after the metal has been cut into wall ties 3, and every surface of the wall ties 3 (including the freshly cut surfaces) is galvanized.
In a modification (not shown) of the wall tie of figures 1 and 2, which enables the tie to be used to assist in holding insulating material in place against a leaf of a cavity wall, a relatively shorter half twist may be provided, located nearer one end of the tie and the tie may be provided with a stixL about halfway along its length by means of which the insulating material may be held against the leaf. During the method outlined above sfcuis »r
Referring to the drawings, the wall tie 3 comprises a flat strip of galvanized mild steel, about 200 mm in length, 20 mm in width and 3.2 nm in thickness. The wall tie 3 conforms to the dimensions shown in British Standard Specification No. 1243 : 1978 Metal Ties for Cavity Wall Construction (see Figure 3 thereof, which shows vertical twist wall ties fabricated from strip). Three circular holes 4 approximately 12 mm in diameter are provided at each end of the wall tie 3. The centres of the holes 4 are 18 mm apart.
A vertical twist 5 is provided midway along the length of the wall tie 3 to prevent moisture travelling along the surface of the wall tie 3 from the outer leaf to the inner leaf of the cavity wall (not shown).
When the wall tie is in position in a wall it is embedded in mortar. The latter passes through the holes 4 and thereby secures the wall tie 3 in position. The anchorage strength has been found to be comparable to that provided by traditional wall ties having bifurcated ends and has also been found to meet the requirements of British Standard No. 5080:
Part I : 1974, Methods of Test for Structural Fixings in concrete and Massonry : Tensile Loading.
Claims (8)
1. A method of manufacturing metal wall ties comprising the following steps: (a) performing a pressing operation at periodic intervals along a length of metal; and 5 (b) cutting the metal into strips of predetermined size, each end of each strip being adapted, as a result of the pressing operation at step (a), to be anchored in mortar.
2. A method according to claim 1 in which the pressing operation at step (a) comprises a punching operation. 10
3. A method according to claim 2 in which each end of each wall tie is provided, as a result of the punching operation at step (a), with a series of holes disposed lengthwise along the wall tie.
4. A method according to claim 3 in which the series of holes so provided comprises three substantially circular holes. 15 5. A method according to any preceding claim, in which·the metal is uncoiled from a coil of strip metal and then flattened before steps (a) and (b) are carried out. 6. A method according to claim 5, in which a further pressing operation is carried out which provides a twist at periodic intervals 20 along the metal such that each wall tie cut at subsequent step (b) has a twist intermediate its ends. 7. A method according to claim 6 in which the twist so provided is relatively short lengthwise and is nearer one end of the wall tie. - 6 49200 8 . A method according to any pr««J»»^. in which a studwelding operation is carried out so that each wall tie when formed has a stud approximately centrally thereon.
5. 9 . A wall tie each end of which comprises a flat finger of material provided with one or more holes by means of which the wall tie can be anchored in mortar.
6. 10 . A wall tie according to claim 3 wherein each finger is provided with a series of three substantially circular holes, the series extending 10 lengthwise along the tie.
7. 11 , A wall tie produced by a method according to any of claims 1 to 8. ii. A wall tie substantially as herein described with reference to and as shown in the accompanying drawings.
8. 13. A method according to claim 1, substantially as herein described.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| IE205379A IE49200B1 (en) | 1981-03-19 | 1981-03-19 | Wall ties and methods of manufacturing wall ties |
| GB8108592A GB2073279A (en) | 1981-03-19 | 1981-03-19 | Wall ties and methods of manufacturing wall ties |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| IE205379A IE49200B1 (en) | 1981-03-19 | 1981-03-19 | Wall ties and methods of manufacturing wall ties |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| IE792053L IE792053L (en) | 1981-09-25 |
| IE49200B1 true IE49200B1 (en) | 1985-08-21 |
Family
ID=11032511
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| IE205379A IE49200B1 (en) | 1981-03-19 | 1981-03-19 | Wall ties and methods of manufacturing wall ties |
Country Status (2)
| Country | Link |
|---|---|
| GB (1) | GB2073279A (en) |
| IE (1) | IE49200B1 (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2135356B (en) * | 1983-02-16 | 1986-04-16 | Harris & Edgar Limited | Wall tie |
| GB2165275B (en) * | 1984-10-04 | 1988-04-07 | Press Bat Holdings Ltd | Wall tie |
| NL193218C (en) * | 1985-08-27 | 1999-03-03 | Nisshin Steel Company | Method for the preparation of stainless steel. |
| DE9100136U1 (en) * | 1990-01-27 | 1991-03-28 | Hebel Gmbh Holding, 8089 Emmering, De | |
| CH686792A5 (en) * | 1994-06-13 | 1996-06-28 | Savatzki Harry L | Partly-elastic spring anchor between building components |
| DE4447533C1 (en) * | 1994-06-17 | 1996-01-18 | Akuso Finanz Und Verlags Ansta | Flat steel anchor bolt |
| GB2404385A (en) * | 2003-06-28 | 2005-02-02 | Kwok Pun Chan | Wall tie with distal mortar engaging formations |
-
1981
- 1981-03-19 GB GB8108592A patent/GB2073279A/en not_active Withdrawn
- 1981-03-19 IE IE205379A patent/IE49200B1/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| GB2073279A (en) | 1981-10-14 |
| IE792053L (en) | 1981-09-25 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CA2730702C (en) | Method for producing steel fibres | |
| AU738388B2 (en) | Grid tee with integrally stitched web | |
| IE49200B1 (en) | Wall ties and methods of manufacturing wall ties | |
| US3540395A (en) | Method of slitting a continuous strip of metal and article formed therefrom | |
| US11319707B1 (en) | Collated rebar clinch clip | |
| CZ289201B6 (en) | Reinforcement strip and process for producing thereof | |
| US1727574A (en) | Staple strip and method of making same | |
| US3604034A (en) | Method and apparatus for making nails with flat circular heads | |
| US4433949A (en) | Split head fastener | |
| EP0648558B1 (en) | Method and apparatus for forming a head of a fastener | |
| JPS649261B2 (en) | ||
| US1822600A (en) | Method of making lock washers | |
| DE918025C (en) | Sheet metal connection | |
| IE48546B1 (en) | Improvements relating to wall ties | |
| US2568027A (en) | Method of making downspout hooks | |
| DE1961442A1 (en) | Making steel bars for concrete reinforcing | |
| JPS6250024A (en) | Production of lightweight shape steel | |
| US3849853A (en) | Method for producing a bearing cage | |
| SU470121A3 (en) | The method of obtaining arranged in the strip pre-oriented nuts and their subsequent installation in the panel | |
| DE3150382C2 (en) | Process for the continuous molding of flat material into a slotted tube | |
| DE88397C (en) | ||
| DE202005004186U1 (en) | Metal band jointing system for joining beginning of new band to end of old band has stamping tools with C-shaped jaws engaging each side of band forming tongues which interlock | |
| GB2263291A (en) | A wall tie | |
| US2061035A (en) | Method for making toothed fasteners | |
| IE63276B1 (en) | Improvements relating to tubing manufacture |