WO2001042583A1 - Method for producing metal profile bars for support structures for panels, particularly of plaster-board, and profile bar produced by the method - Google Patents

Method for producing metal profile bars for support structures for panels, particularly of plaster-board, and profile bar produced by the method Download PDF

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Publication number
WO2001042583A1
WO2001042583A1 PCT/EP2000/012166 EP0012166W WO0142583A1 WO 2001042583 A1 WO2001042583 A1 WO 2001042583A1 EP 0012166 W EP0012166 W EP 0012166W WO 0142583 A1 WO0142583 A1 WO 0142583A1
Authority
WO
WIPO (PCT)
Prior art keywords
profile
profile bar
strip
forming
central web
Prior art date
Application number
PCT/EP2000/012166
Other languages
French (fr)
Inventor
Sergio Dallan
Andrea Dallan
Original Assignee
Dallan S.R.L.
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 Dallan S.R.L. filed Critical Dallan S.R.L.
Priority to AU26715/01A priority Critical patent/AU2671501A/en
Publication of WO2001042583A1 publication Critical patent/WO2001042583A1/en

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C3/00—Structural elongated elements designed for load-supporting
    • E04C3/02—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces
    • E04C3/04—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal
    • E04C3/08—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal with apertured web, e.g. with a web consisting of bar-like components; Honeycomb girders
    • E04C3/09—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal with apertured web, e.g. with a web consisting of bar-like components; Honeycomb girders at least partly of bent or otherwise deformed strip- or sheet-like material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D47/00—Making rigid structural elements or units, e.g. honeycomb structures
    • B21D47/01—Making rigid structural elements or units, e.g. honeycomb structures beams or pillars
    • B21D47/02—Making rigid structural elements or units, e.g. honeycomb structures beams or pillars by expanding
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C3/00—Structural elongated elements designed for load-supporting
    • E04C3/02—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces
    • E04C3/04—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal
    • E04C2003/0404—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal beams, girders, or joists characterised by cross-sectional aspects
    • E04C2003/0408—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal beams, girders, or joists characterised by cross-sectional aspects characterised by assembly or the cross-section
    • E04C2003/0421—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal beams, girders, or joists characterised by cross-sectional aspects characterised by assembly or the cross-section comprising one single unitary part
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C3/00—Structural elongated elements designed for load-supporting
    • E04C3/02—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces
    • E04C3/04—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal
    • E04C2003/0404—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal beams, girders, or joists characterised by cross-sectional aspects
    • E04C2003/0426—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal beams, girders, or joists characterised by cross-sectional aspects characterised by material distribution in cross section
    • E04C2003/0434—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal beams, girders, or joists characterised by cross-sectional aspects characterised by material distribution in cross section the open cross-section free of enclosed cavities
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C3/00—Structural elongated elements designed for load-supporting
    • E04C3/02—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces
    • E04C3/04—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal
    • E04C2003/0404—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal beams, girders, or joists characterised by cross-sectional aspects
    • E04C2003/0443—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal beams, girders, or joists characterised by cross-sectional aspects characterised by substantial shape of the cross-section
    • E04C2003/0473—U- or C-shaped

Definitions

  • This invention relates to a method for producing metal profile bars for support structures for panels, particularly of plaster-board, and a profile bar produced by the method.
  • plaster-board panels Metal structures to which plaster-board panels are applied are known. They generally comprise vertical C-shaped profile bars secured at both their ends within the longitudinal cavity of horizontal profile bars fixed to the floor and ceiling. The plaster-board panels are fixed to one or both of the lateral flanges of these vertical C-shaped profile bars, preferably by self- tapping screws.
  • a drawback of these known profile bars is that during the fixing of the panels to the vertical C-shaped profile bars, the self-tapping screws tend to bend that flange of the profile bar into which they are being screwed, so making fixing difficult.
  • these profile bars are provided with aperture, preferably with a dished edge, and/or with raised stiffening portions. This not only does not reduce material consumption, but requires additional work on the profile bar during or after its manufacture.
  • Another known profile bar for applying plaster-board panels has a substantially ⁇ -shaped cross-section, with the two inclined flanges comprising a series of cuts for reducing the thermal conductivity of the profile bar and hence increasing its fire resistance.
  • a certain facility for deforming the profile bar at the inclined flanges enables the distance between the two parallel flanges to be adjusted, hence enabling the same profile bars to be used for forming plaster-board walls of different thicknesses.
  • An object of the invention is to produce profile bars for forming plaster-board panel support structures which provide all the facilities offered individually by the different types of known profile bars, while at the same time eliminating all the drawback individually presented by said known profile bars.
  • the C-shaped profile bar obtained in this manner is characterised in that at least its central web comprises at least one stretched longitudinal band comprising a plurality of apertures with their edge bent and projecting from the plane of the web.
  • Figure 1 is a plan view of a piece of the profile bar of the invention
  • Figure 2 shows a portion of strip which has already undergone the pressing stage but has not yet been subjected to the forming and stretching stages
  • Figure 3 is a cross-section on the line Ill-Ill of Figure 2
  • Figure 4 is a cross-section on the line IV-IV of Figure 2
  • Figure 5 is a cross-section on the line V-V of Figure 2
  • Figure 6 shows in side view the profile bar.
  • the profile bar of the invention is of C-shape, with its lateral flanges 2 flat and its central web 4 having a stretched central longitudinal band 6 comprising a plurality of apertures 8 with their edge bent and projecting from the plane of said web.
  • a metal strip unwound from a reel and if necessary subjected to usual straightening is firstly incised and pressed along the longitudinal band 6, which in the finished profile bar is to form the central web 4.
  • the strip processed in this manner is subjected to profile-forming to transform it into an intermediate C- shaped profile bar with its lateral flanges equal to the width of the flanges of the final C-shaped profile bar to be obtained, and with its central web of width less than the central web of the final C-shaped profile bar to be obtained, the longitudinal bends along this web being made such that the endless rim of the incisions 10 projects towards the interior of the profile bar.
  • This intermediate C-shaped profile bar is then stretched transversely to open the incision 10 and cause the central web to assume the width of the final profile bar to be obtained.
  • profile-forming and stretching can be effected simultaneously, or firstly profile-forming then stretching, or vice versa.
  • at least partial profile-forming can be effected, then incising and pressing, and finally stretching.
  • the increase in transverse flexure yieldability of the central web 4 due to the stretching is compensated by an increase in the moment of inertia, and hence by an increase in the transverse bending resistance, obtained by pressing.
  • the mechanical characteristics of the profile bar obtained are totally comparable with those of a profile bar of identical dimensions by without the stretched web.
  • the profile bar of the invention also has considerable further advantages, such as:
  • the illustrated example relates to a C-shaped profile bar with a single central web stretched and then pressed into spaced-apart rectangular areas or into various undulated patterns.
  • stretching and pressing could also be applied to the lateral flanges 2, which in this manner can be lightened and stiffened against transverse flexure, so being suitable for ceiling application of plaster-board panels without suffering deformation of the lateral flanges, which could be a possible cause of uncoupling of the profile bar form the suspension member.

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Mechanical Engineering (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Finishing Walls (AREA)
  • Laminated Bodies (AREA)

Abstract

A method for producing C-shaped metal profile bars for support structures for panels, particularly of plaster-board, characterised by subjecting a metal strip of width less than the development of the profile bar to be obtained, to the following operations: incising at least that band of the strip which in the C-shaped profile bar is to form the central web; pressing said band, with bending of the edges of the incisions and dishing of the edge ends to obtain a rim endlessly bounding each incision; profile-forming said strip to obtain the C-shaped profile bar; transversely stretching the pressed portion of the strip.

Description

METHOD FOR PRODUCING METAL PROFILE BARS FOR SUPPORT STRUCTURES FOR PANELS, PARTICULARLY OF PLASTER-BOARD, AND PROFILE BAR PRODUCED BY THE METHOD.
This invention relates to a method for producing metal profile bars for support structures for panels, particularly of plaster-board, and a profile bar produced by the method.
Metal structures to which plaster-board panels are applied are known. They generally comprise vertical C-shaped profile bars secured at both their ends within the longitudinal cavity of horizontal profile bars fixed to the floor and ceiling. The plaster-board panels are fixed to one or both of the lateral flanges of these vertical C-shaped profile bars, preferably by self- tapping screws.
A drawback of these known profile bars is that during the fixing of the panels to the vertical C-shaped profile bars, the self-tapping screws tend to bend that flange of the profile bar into which they are being screwed, so making fixing difficult.
To enable cables to pass behind the plaster-board panels and through the vertical profile bars of the support structure, these profile bars, and in particular their central web, are provided with aperture, preferably with a dished edge, and/or with raised stiffening portions. This not only does not reduce material consumption, but requires additional work on the profile bar during or after its manufacture.
Another known profile bar for applying plaster-board panels has a substantially Σ-shaped cross-section, with the two inclined flanges comprising a series of cuts for reducing the thermal conductivity of the profile bar and hence increasing its fire resistance. Moreover, a certain facility for deforming the profile bar at the inclined flanges enables the distance between the two parallel flanges to be adjusted, hence enabling the same profile bars to be used for forming plaster-board walls of different thicknesses.
Drawbacks of this profile bar are the considerable use of material for its construction and the large number of operations required for its production.
An object of the invention is to produce profile bars for forming plaster-board panel support structures which provide all the facilities offered individually by the different types of known profile bars, while at the same time eliminating all the drawback individually presented by said known profile bars.
This and further objects which will be apparent from the ensuing description are attained, according to the invention, by a method for producing C-shaped metal profile bars for support structures for panels, particularly of plaster-board, as described in claim 1.
The C-shaped profile bar obtained in this manner is characterised in that at least its central web comprises at least one stretched longitudinal band comprising a plurality of apertures with their edge bent and projecting from the plane of the web. A preferred embodiment of the invention is described in detail hereinafter with reference to the accompanying drawings, on which: Figure 1 is a plan view of a piece of the profile bar of the invention, Figure 2 shows a portion of strip which has already undergone the pressing stage but has not yet been subjected to the forming and stretching stages,
Figure 3 is a cross-section on the line Ill-Ill of Figure 2, Figure 4 is a cross-section on the line IV-IV of Figure 2, Figure 5 is a cross-section on the line V-V of Figure 2, and Figure 6 shows in side view the profile bar.
As can be seen from the figures, the profile bar of the invention is of C-shape, with its lateral flanges 2 flat and its central web 4 having a stretched central longitudinal band 6 comprising a plurality of apertures 8 with their edge bent and projecting from the plane of said web.
To construct this profile bar, according to the invention a metal strip unwound from a reel and if necessary subjected to usual straightening is firstly incised and pressed along the longitudinal band 6, which in the finished profile bar is to form the central web 4.
More specifically, in said band 6 a plurality of longitudinal incisions
10 are made, aligned along parallel rows, the same tool making these incisions also being used to bend the metal along the edges of each incision and to dish the metal along the two edge ends, to obtain a sort of endless rim about each of said incisions 10.
After performing this series of operations, the strip processed in this manner is subjected to profile-forming to transform it into an intermediate C- shaped profile bar with its lateral flanges equal to the width of the flanges of the final C-shaped profile bar to be obtained, and with its central web of width less than the central web of the final C-shaped profile bar to be obtained, the longitudinal bends along this web being made such that the endless rim of the incisions 10 projects towards the interior of the profile bar.
This intermediate C-shaped profile bar is then stretched transversely to open the incision 10 and cause the central web to assume the width of the final profile bar to be obtained. This, by virtue of the rim surrounding each aperture 8, present a resistance to transverse bending which is equal to or greater than that of an unstretched profile bar, notwithstanding the reduction in transverse bending resistance which stretching inevitably brings.
In the described example the incising and the pressing of the incision edges are effected virtually simultaneously by the same tool (see Figures 3- 5) after which initial profile-forming is effected, then stretching, followed by final profile-forming.
However by using different equipment the various operations can be effected in different sequence. For example, profile-forming and stretching can be effected simultaneously, or firstly profile-forming then stretching, or vice versa. Alternatively, at least partial profile-forming can be effected, then incising and pressing, and finally stretching.
Independently of the method followed, the increase in transverse flexure yieldability of the central web 4 due to the stretching is compensated by an increase in the moment of inertia, and hence by an increase in the transverse bending resistance, obtained by pressing.
Because of this, the mechanical characteristics of the profile bar obtained are totally comparable with those of a profile bar of identical dimensions by without the stretched web. At the same time the profile bar of the invention also has considerable further advantages, such as:
- a low heat transfer coefficient from one lateral flange to the other,
- a low sound transfer coefficient from one lateral flange to the other,
- the ability to ventilate the interspace of the wall bounded by the facing palster-board panels, by way of the panel support structure, - use of a smaller quantity of material than that required for a traditional C- shaped profile bar of equal outer dimensions, - the ability to vary the width of the central web of the profile bar within certain limits while starting from the same metal strips, by varying the extent of stretching,
- the ability to obtain cable passage aperture in the profile bar without special machining, these apertures being able to be enlarged if necessary by simply operating with a cutter in the regions concerned,
- the ability to obtain these facilities on the profile-forming line itself, and hence without substantial increase in machining times and costs.
The illustrated example relates to a C-shaped profile bar with a single central web stretched and then pressed into spaced-apart rectangular areas or into various undulated patterns. However, stretching and pressing could also be applied to the lateral flanges 2, which in this manner can be lightened and stiffened against transverse flexure, so being suitable for ceiling application of plaster-board panels without suffering deformation of the lateral flanges, which could be a possible cause of uncoupling of the profile bar form the suspension member.

Claims

C L A I M S
1. A method for producing C-shaped metal profile bars for support structures for panels, particularly of plaster-board, characterised by subjecting a metal strip of width less than the development of the profile bar to be obtained, to the following operations:
- incising at least that band (6) of the strip which in the C-shaped profile bar is to form the central web (4),
- pressing said band (6), with bending of the edges of the incisions (10) and dishing of the edge ends to obtain a rim endlessly bounding each incision, - profile-forming said strip to obtain the C-shaped profile bar,
- transversely stretching the pressed portion of the strip.
2. A method as claimed in claim 1 , characterised by effecting the pressing such as to bring the burrs, obtained during the preceding incising stage, onto that side of the strip corresponding to the inner side of the profile bar to be obtained.
3. A method as claimed in claim 1 , characterised by effecting the incising and pressing simultaneously.
4. A method as claimed in claim 1 , characterised by effecting the profile- forming and stretching simultaneously.
5. A method as claimed in claim 1 , characterised by effecting the profile- forming after the stretching.
6. A method as claimed in claim 1 , characterised by effecting the stretching after the profile-forming.
7. A method as claimed in claim 1 , characterised in that the profile- forming at least partially precedes the incising and pressing.
8. A method as claimed in one or more of claims 1 to 7, characterised by processing those longitudinal bands of the metal strip which are to form the central web and the two lateral flanges in the C-shaped profile bar.
9. A C-shaped metal profile bar obtainable by the method claimed in one or more of claims 1 to 8, characterised in that at least its central web (4) comprises at least one stretched longitudinal band (8) displaying a plurality of apertures (8) with their edge bent and projecting from the plane of the web.
10. A profile bar as claimed in claim 9, characterised in that only its central web (4) comprises the longitudinal band (6) with the apertures (8).
1 1. A profile bar as claimed in claim 9, characterised in that its central web (4) and both its lateral flanges comprise the longitudinal band (6) with the apertures (8).
12. A profile bar as claimed in claim 9, characterised in that the edge of the apertures (8) is bent towards the interior of the profile bar.
PCT/EP2000/012166 1999-12-07 2000-12-04 Method for producing metal profile bars for support structures for panels, particularly of plaster-board, and profile bar produced by the method WO2001042583A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU26715/01A AU2671501A (en) 1999-12-07 2000-12-04 Method for producing metal profile bars for support structures for panels, particularly of plaster-board, and profile bar produced by the method

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITVE990047 IT1311807B1 (en) 1999-12-07 1999-12-07 METHOD FOR OBTAINING METALLIC PROFILES FOR PANEL SUPPORT STRUCTURES, PARTICULARLY PLASTERBOARD, AND PROFILE OBTAINABLE WITH THE
ITVE99A000047 1999-12-07

Publications (1)

Publication Number Publication Date
WO2001042583A1 true WO2001042583A1 (en) 2001-06-14

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PCT/EP2000/012166 WO2001042583A1 (en) 1999-12-07 2000-12-04 Method for producing metal profile bars for support structures for panels, particularly of plaster-board, and profile bar produced by the method

Country Status (3)

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AU (1) AU2671501A (en)
IT (1) IT1311807B1 (en)
WO (1) WO2001042583A1 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005123298A1 (en) * 2004-06-17 2005-12-29 Dallan S.P.A. Method for producing expanded metal profiles and profile produced by the method
WO2005123297A1 (en) * 2004-06-17 2005-12-29 Dallan S.P.A. Method for producing expanded metal profiles and profile produced by the method
WO2007042525A2 (en) * 2005-10-12 2007-04-19 Dallan S.P.A. Profile for plaster board walls and accessory for its fixing to the ceiling
USD1021151S1 (en) 2021-04-26 2024-04-02 Jaimes Industries, Inc. Framing member

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1937762A (en) * 1931-02-27 1933-12-05 Kalman Steel Company Inc Expanded load bearing member and method of forming the same
US3129792A (en) * 1960-08-31 1964-04-21 Jacob M Gwynne Nailable metal structural members
US3298081A (en) * 1964-03-19 1967-01-17 Penn Metal Company Inc Method of and apparatus for cold working and expanding a metal member such as a channel stud
GB1308560A (en) * 1969-08-06 1973-02-21 Wendel Cie Sa De Structural members
US3812558A (en) * 1970-04-30 1974-05-28 H Watanabe Method and apparatus for manufacturing expanded structural members and its products

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1937762A (en) * 1931-02-27 1933-12-05 Kalman Steel Company Inc Expanded load bearing member and method of forming the same
US3129792A (en) * 1960-08-31 1964-04-21 Jacob M Gwynne Nailable metal structural members
US3298081A (en) * 1964-03-19 1967-01-17 Penn Metal Company Inc Method of and apparatus for cold working and expanding a metal member such as a channel stud
GB1308560A (en) * 1969-08-06 1973-02-21 Wendel Cie Sa De Structural members
US3812558A (en) * 1970-04-30 1974-05-28 H Watanabe Method and apparatus for manufacturing expanded structural members and its products

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005123298A1 (en) * 2004-06-17 2005-12-29 Dallan S.P.A. Method for producing expanded metal profiles and profile produced by the method
WO2005123297A1 (en) * 2004-06-17 2005-12-29 Dallan S.P.A. Method for producing expanded metal profiles and profile produced by the method
JP2008502482A (en) * 2004-06-17 2008-01-31 ダラン エス．ピー．エー． Method of forming expanded metal outer shape deformed product and outer shape deformed material formed by the method
EA010050B1 (en) * 2004-06-17 2008-06-30 ДАЛЛАН С.п.А. Method for producing expanded metal profiles and profile produced by the method
AU2005254198B2 (en) * 2004-06-17 2009-07-30 Dallan S.P.A. Method for producing expanded metal profiles and profile produced by the method
US7934300B2 (en) 2004-06-17 2011-05-03 Dallan S.P.A. Method for producing expanded metal profiles
WO2007042525A2 (en) * 2005-10-12 2007-04-19 Dallan S.P.A. Profile for plaster board walls and accessory for its fixing to the ceiling
WO2007042525A3 (en) * 2005-10-12 2007-05-31 Dallan Spa Profile for plaster board walls and accessory for its fixing to the ceiling
USD1021151S1 (en) 2021-04-26 2024-04-02 Jaimes Industries, Inc. Framing member

Also Published As

Publication number Publication date
AU2671501A (en) 2001-06-18
ITVE990047A1 (en) 2001-06-07
IT1311807B1 (en) 2002-03-19

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