EP0342442A1 - Distancier pour armature de béton - Google Patents

Distancier pour armature de béton Download PDF

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Publication number
EP0342442A1
EP0342442A1 EP89108084A EP89108084A EP0342442A1 EP 0342442 A1 EP0342442 A1 EP 0342442A1 EP 89108084 A EP89108084 A EP 89108084A EP 89108084 A EP89108084 A EP 89108084A EP 0342442 A1 EP0342442 A1 EP 0342442A1
Authority
EP
European Patent Office
Prior art keywords
bar
strip
spacer according
tabs
concrete spacer
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.)
Withdrawn
Application number
EP89108084A
Other languages
German (de)
English (en)
Inventor
Ag Construmat
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of EP0342442A1 publication Critical patent/EP0342442A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
    • E04C5/16—Auxiliary parts for reinforcements, e.g. connectors, spacers, stirrups
    • E04C5/20—Auxiliary parts for reinforcements, e.g. connectors, spacers, stirrups of material other than metal or with only additional metal parts, e.g. concrete or plastics spacers with metal binding wires

Definitions

  • the present invention relates to a strip-shaped concrete spacer with lateral support feet.
  • Concrete spacers are required when concreting as spacing elements between reinforcing steel and formwork to ensure a uniform and uniform concrete covering of the reinforcing steel
  • Bar-shaped concrete spacers are known in many designs and shapes and in practical use.
  • a strip-shaped concrete spacer with lateral support feet is known, for example, from the sales catalog of the company Reuss, Wuppertal / FRG for 1988, page 9.
  • This known spacer is a very complex injection molded part and is only about 20 cm long. Because this length is absolutely for practical use is insufficient, several elements must be put together to form a longer unit. For technical and economic reasons, injection molded parts cannot be manufactured longer than about 1 m.
  • the strip-shaped concrete spacer according to the present invention is therefore characterized in that it consists of a bar with an essentially rectangular cross section, which always has oblique, angled or curved incisions starting from the same of its two narrow sides and in which the incisions are made by these incisions formed tabs to form the support feet are bent out laterally with respect to the longitudinal direction of the bar.
  • Extrusion is particularly suitable as a manufacturing process. After the extrusion, as long as the extruded strand is still soft and malleable, only one further operation is required, namely the cutting out and bending out of the tabs to form the support feet.
  • the plates can also be cut out and bent out at any later point in time.
  • the concrete spacer according to the invention has very good stability, in particular very good lateral stabilization. Very little material is required to manufacture it. Due to its shape, the concrete spacer according to the invention is completely surrounded by fresh concrete during concreting. There are no undesirable and disadvantageous cavities.
  • the strip-shaped concrete spacers shown in the figures each consist of a bar with a substantially rectangular cross section, which always have incisions starting from the lower 1 of their two narrow sides 1, 2 at regular intervals from one another. Only one of the incisions is designated 3 in each case.
  • the incisions 3 in the strip result in tabs which are bent out at right angles to form lateral support feet in relation to the longitudinal direction R of the strip.
  • the tabs are alternately bent out on different sides.
  • Two of the tabs bent out to different sides are designated in FIGS. 1 and 4 by 4 and 5, respectively.
  • the incisions 6 can basically be provided in various forms.
  • Fig. 1 the incisions are angled at right angles, resulting in rectangular tabs or support feet. 2 and 3, the incisions angled in itself.
  • the tabs resulting from the incisions have not yet been bent out to the side here, but the bending lines resulting from the bending out are indicated by dashed lines.
  • Fig. 4 the incisions are curved approximately semicircular. The resulting curved shape of the support legs corresponds to the preferred one.
  • the cuts in the bar can, as in FIGS. 1, 3 and 4, each in the same direction but, as shown in FIG. 2, also run in pairs at an angle to one another, be angled or curved.
  • the length L and height H of the tabs are chosen to be approximately 3/4 of the width B of the bar, but other dimensions are also possible.
  • the length L of the bent-out tabs and their maximum height H should correspond to at least about half the width of the ledge B to achieve sufficient lateral stability and, for reasons of the load-bearing capacity of the concrete spacer, at most about 5/6 of this width.
  • the mutual spacing A of the tabs is chosen approximately according to twice the strip width B, as a result of which strips not bent out between the tabs cuts remain, of which only one is labeled 6.
  • the strip sections 6 increase the torsional rigidity of the concrete spacer and its load-bearing capacity.
  • the mutual distances between the individual tabs are chosen to be so small that no strip sections 6 remain between them.
  • the mutual distance A between the tabs bent out to the same side of the bar should correspond to at least about half and at most about 10 times, but preferably about 5 times the bar width B.
  • the incisions 3 running in pairs against each other are alternately formed with different maximum heights H1 and H2 and each end in the same cross-sectional plane of the bar.
  • the tabs formed by these incisions on each side give support feet which are arranged directly opposite one another.
  • the support feet are each offset from one another. This offset arrangement of the support feet relative to one another advantageously reduces the risk of cracks forming in the concrete transversely to the longitudinal direction of the bar, which is why this embodiment is preferable.
  • the concrete spacers shown are used when concreting their lower narrow side 1 placed on the formwork.
  • the reinforcing steel comes to rest on its upper narrow side 2.
  • the concrete cover of the reinforcing steel is therefore determined by the width B of the bar.
  • the last width is to be selected in accordance with the desired or prescribed concrete cover.
  • Dimensions between 15 and 50 mm are common.
  • the thickness D of the bar should be between 3 and 10 mm, but preferably about 5 mm.
  • the upper narrow side 2 of the bar can be provided at regular intervals of preferably 5 cm with transverse grooves with a depth between 2 and 4 mm and a width between 5 and 15 mm, as shown in FIG. 4.
  • the reinforcement bars can be inserted into these transverse grooves and experience one in them Right good stabilization against slipping sideways.
  • the fact that the transverse grooves are arranged at regular intervals automatically results in the desired uniform spacing of the reinforcement bars from one another.
  • the time-consuming measuring of the distances as well as the time-consuming alignment of the reinforcing bars on the construction site is no longer necessary.
  • the small depth of the transverse grooves ensures that distances other than those specified by the sequence of the transverse grooves can also be selected.
  • the upper narrow side 2 of the strip can furthermore be provided with a plurality of notches 11 of reduced depth, approximately in the manner of a toothed rack, extending between the individual transverse grooves and extending transversely to their longitudinal direction R. as also shown in Fig. 3.
  • the side surfaces of the bar can still be roughened.
  • the roughening can be carried out most simply, for example, immediately after the extrusion and even before the tongues have been cut out and bent out by means of a roughing or needle roller.
  • a surface roughness between about 0.1 and 2 mm should be aimed for.
  • the bar in the area of its upper narrow side 2, on which the concrete bars come to rest can be provided with a thickening to form a weakly T-shaped cross section, as shown in FIG. 5.
  • the thickness D1 of the strip should preferably correspond approximately to three times its remaining thickness D in this area.
  • a plastic is preferably used as the material for the concrete spacer.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Reinforcement Elements For Buildings (AREA)
EP89108084A 1988-05-19 1989-05-05 Distancier pour armature de béton Withdrawn EP0342442A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH1897/88 1988-05-19
CH189788 1988-05-19

Publications (1)

Publication Number Publication Date
EP0342442A1 true EP0342442A1 (fr) 1989-11-23

Family

ID=4221147

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89108084A Withdrawn EP0342442A1 (fr) 1988-05-19 1989-05-05 Distancier pour armature de béton

Country Status (2)

Country Link
EP (1) EP0342442A1 (fr)
DE (1) DE8903646U1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5664390A (en) * 1995-11-27 1997-09-09 Sorkin; Felix L. Bolster for use in construction

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1570814A (en) * 1924-09-10 1926-01-26 Jr Horace M Woolley Reenforcing-bar support
DE553661C (de) * 1929-11-23 1932-06-29 Eugen E Riekert Abstandhalter fuer Eiseneinlagen von Eisenbetonbalken und -decken
US2260973A (en) * 1939-03-10 1941-10-28 Healey Harry Concrete reinforcement spacer
US3529392A (en) * 1968-10-11 1970-09-22 Chariot Mfg Co Plastic support bridge for concrete reinforcing rods
CA863601A (en) * 1969-12-24 1971-02-16 V. Schwarz Alfred Grid assembly for concrete reinforcing steel
DE3021141A1 (de) * 1980-06-04 1981-12-10 J. Lehde Gmbh, 4770 Soest Abstandshalter insbesondere fuer mehrlagige bewehrungen
EP0049529A1 (fr) * 1980-10-08 1982-04-14 Jozo Akrapovic Pièce de séparation pour le support de treillis soudés
EP0173988A2 (fr) * 1984-09-03 1986-03-12 Walter Hoff Elément insérable pour coffrages de béton
DE3434017A1 (de) * 1984-09-15 1986-03-20 Exte-Extrudertechnik GmbH, 5272 Wipperfürth Abstandshalter
DE8631902U1 (de) * 1986-11-28 1987-02-12 Hammerl, Gerd, 7121 Gemmrigheim Abstandshalter

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1570814A (en) * 1924-09-10 1926-01-26 Jr Horace M Woolley Reenforcing-bar support
DE553661C (de) * 1929-11-23 1932-06-29 Eugen E Riekert Abstandhalter fuer Eiseneinlagen von Eisenbetonbalken und -decken
US2260973A (en) * 1939-03-10 1941-10-28 Healey Harry Concrete reinforcement spacer
US3529392A (en) * 1968-10-11 1970-09-22 Chariot Mfg Co Plastic support bridge for concrete reinforcing rods
CA863601A (en) * 1969-12-24 1971-02-16 V. Schwarz Alfred Grid assembly for concrete reinforcing steel
DE3021141A1 (de) * 1980-06-04 1981-12-10 J. Lehde Gmbh, 4770 Soest Abstandshalter insbesondere fuer mehrlagige bewehrungen
EP0049529A1 (fr) * 1980-10-08 1982-04-14 Jozo Akrapovic Pièce de séparation pour le support de treillis soudés
EP0173988A2 (fr) * 1984-09-03 1986-03-12 Walter Hoff Elément insérable pour coffrages de béton
DE3434017A1 (de) * 1984-09-15 1986-03-20 Exte-Extrudertechnik GmbH, 5272 Wipperfürth Abstandshalter
DE8631902U1 (de) * 1986-11-28 1987-02-12 Hammerl, Gerd, 7121 Gemmrigheim Abstandshalter

Also Published As

Publication number Publication date
DE8903646U1 (de) 1989-06-01

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