WO1998045066A1 - Sheet joint and a method for manufacture thereof - Google Patents

Sheet joint and a method for manufacture thereof Download PDF

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Publication number
WO1998045066A1
WO1998045066A1 PCT/SE1998/000632 SE9800632W WO9845066A1 WO 1998045066 A1 WO1998045066 A1 WO 1998045066A1 SE 9800632 W SE9800632 W SE 9800632W WO 9845066 A1 WO9845066 A1 WO 9845066A1
Authority
WO
WIPO (PCT)
Prior art keywords
sheet part
yoke
sheet
joint
hole
Prior art date
Application number
PCT/SE1998/000632
Other languages
French (fr)
Other versions
WO1998045066A8 (en
Inventor
Sven JERKSJÖ
Original Assignee
Abb Ab
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 Abb Ab filed Critical Abb Ab
Priority to AU69358/98A priority Critical patent/AU6935898A/en
Publication of WO1998045066A1 publication Critical patent/WO1998045066A1/en
Publication of WO1998045066A8 publication Critical patent/WO1998045066A8/en

Links

Classifications

    • 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
    • B21D39/00—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders
    • B21D39/03—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders of sheet metal otherwise than by folding

Definitions

  • the present invention relates to a sheet joint, intended to hold together parts of a structure, of the kind described in the preamble to claim 1. More particularly, the invention relates to a sheet join for primarily joining together cable distribution cabinets.
  • the sheet parts intended for joining are provided with flanges folded-up along the edges.
  • the object of the invention is to provide a sheet joint, with the aid of which a sheet structure may be joined together in a simple manner using simple tools.
  • the joint is intended to eliminate the need of fixtures during mounting and allow a good accessibility with tools for joining.
  • the joint is to be detachable and allow assembly of a large number of structures based on a wide assortment of stocked, less bulky sheet parts.
  • a through-hole is provided in one part and a yoke, drawn up from the sheet, is provided in the other part, the yoke being adapted to fit into the hole and penetrate through this .
  • That part of the yoke which penetrates through the hole is adapted to receive a wedge which causes a tensile force in the yoke. While at the same time the wedge makes contact with one sheet part, it causes a tensile force in the other sheet part such that both sheets are brought against each other, whereby the wedge locks the joint with prestress.
  • the wedge may be optionally replaced by, for example, a screw which may be slightly wedge-shaped. In the oint achieved, the wedge or the screw is oriented in a direction normal to the sheet part. This gives the fitter ample room for tools when locking the joint.
  • the yoke is arranged with such fit and such shape that, when the sheet parts are brought together, it finds its way into the hole and hence orients the sheet parts in the position they are to assume when locking the joint.
  • One of the sheet parts may then be held against the other by the fitter while at the same time he drives the wedge home, thus eliminating the use of a fixture.
  • sheet parts for cable distribution cabinets and other structures may be kept in stock in a large number of variants without occupying a large storage space. Since the individual sheet parts are not bulky, they may undergo, for example, a galvanization or painting process in a simple manner. Nor does the invented joint entail any damage to such galvanization or painting.
  • Figure 1 shows a section of a sheet joint according to the invention
  • Figure 2 shows a cross section of the joint.
  • Figures 1 and 2 show a sheet joint according to the invention.
  • a first sheet part 1 comprises a flange 2, folded up at right angles, and a second sheet part 3 comprises a flange 4, also folded up at right angles.
  • the flange 2 of the first sheet part makes contact with the flange 4 of the second sheet part, the confronting outer sides of the flanges being in butt contact with each other.
  • a through-hole 5 is arranged, through which a yoke 6, comprised in the flange of the second sheet part, penetrates . That part of the yoke which passes through the hole exhibits, between the inside of the yoke itself and the inside of the flange 2 of the first sheet part, an opening through which a screw 7 is inserted.
  • the screw 7, which may be equally replaced by a wedge, exerts a tensile force in the yoke 6 for the flange 4 of the second sheet part. Since, at the same time, the screw 7 makes contact, with pressure, with the flange 2 provided with a hole, the forces result in the hollow flange 2 being drawn towards the yoke flange 4.
  • the yoke 6 is designed so as to exhibit resilient properties, the joint thus being pre- stressed and allowing a certain movement.
  • the hole 5 is punched out of the hollow flange 2 and is rectangular in shape.
  • the yoke 6 is arranged by extracting a slitted part of the yoke flange 4 and thus has a rectangular cross section.
  • the joint is adapted to function in thin-sheet structures of up to 3 mm.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Clamps And Clips (AREA)
  • Connection Of Plates (AREA)

Abstract

A joint for joining together a first sheet part (1) and a second sheet part (3). A hole (5) is made through the first sheet part for penetration of a yoke (6) comprised in the second sheet part. When assembling the sheet parts, a hole for driving in a wedge (7) arises between the yoke and the inside of the first sheet part. The wedge exerts a tensile force in the yoke (6) and a compressive force against the first sheet part, the wedge thus locking the joint with prestress.

Description

Sheet joint and a method for manufacture thereof .
TECHNICAL FIELD
The present invention relates to a sheet joint, intended to hold together parts of a structure, of the kind described in the preamble to claim 1. More particularly, the invention relates to a sheet join for primarily joining together cable distribution cabinets.
BACKGROUND ART
When joining together sheet structures, such as, for example, cable distribution cabinets, it is known to join together the different parts by a welded joint. In such joints, the cabinet receives its final shape at an early stage in the manufacturing process. This implies that the cabinet becomes unwieldy in the continued process, which may be, for example, galvanization. Because the cabinet already occupies its final volume, the cabinet thus manufactured also entails considerable storage costs.
Another known way of joining sheet structures is by means of a screw or pop rivet joint. This type of joint entails a considerably improved flexibility as regards final products and stock-keeping. To obtain sufficient accuracy in the joining operation, drilling of holes for screws or rivets is often carried out at the site of installation. This work thus requires access to a boring machine. A further disadvantage is that the structural parts must be temporarily fixed in a fixture during the joining operation.
To obtain a better stiffness, the sheet parts intended for joining are provided with flanges folded-up along the edges. In a screw or rivet joint, this means that the hole and thus the screw or the rivet are arranged in parallel with the plane side of the sheet part. This results in inferior accessibility and reduces space for working with tools during the mounting. SUMMARY OF THE INVENTION
The object of the invention is to provide a sheet joint, with the aid of which a sheet structure may be joined together in a simple manner using simple tools. The joint is intended to eliminate the need of fixtures during mounting and allow a good accessibility with tools for joining. The joint is to be detachable and allow assembly of a large number of structures based on a wide assortment of stocked, less bulky sheet parts.
This is achieved according to the invention by a sheet joint which exhibits the characteristic features described in the independent claims 1 and 4. Advantageous embodiments are described in the dependent claims .
According to the invention, during the joining of two sheet parts, a through-hole is provided in one part and a yoke, drawn up from the sheet, is provided in the other part, the yoke being adapted to fit into the hole and penetrate through this . That part of the yoke which penetrates through the hole is adapted to receive a wedge which causes a tensile force in the yoke. While at the same time the wedge makes contact with one sheet part, it causes a tensile force in the other sheet part such that both sheets are brought against each other, whereby the wedge locks the joint with prestress.
The wedge may be optionally replaced by, for example, a screw which may be slightly wedge-shaped. In the oint achieved, the wedge or the screw is oriented in a direction normal to the sheet part. This gives the fitter ample room for tools when locking the joint. The yoke is arranged with such fit and such shape that, when the sheet parts are brought together, it finds its way into the hole and hence orients the sheet parts in the position they are to assume when locking the joint. One of the sheet parts may then be held against the other by the fitter while at the same time he drives the wedge home, thus eliminating the use of a fixture. By means of the invention, sheet parts for cable distribution cabinets and other structures may be kept in stock in a large number of variants without occupying a large storage space. Since the individual sheet parts are not bulky, they may undergo, for example, a galvanization or painting process in a simple manner. Nor does the invented joint entail any damage to such galvanization or painting.
BRIEF DESCRIPTION OF THE DRAWINGS
The invention will be explained in greater detail by description of an embodiment with reference to the accompanying drawing, wherein
Figure 1 shows a section of a sheet joint according to the invention, and
Figure 2 shows a cross section of the joint.
DESCRIPTION OF THE PREFERRED EMBODIMENTS
Figures 1 and 2 show a sheet joint according to the invention. A first sheet part 1 comprises a flange 2, folded up at right angles, and a second sheet part 3 comprises a flange 4, also folded up at right angles. In the joint, the flange 2 of the first sheet part makes contact with the flange 4 of the second sheet part, the confronting outer sides of the flanges being in butt contact with each other. In the flange 2 of the first sheet part, a through-hole 5 is arranged, through which a yoke 6, comprised in the flange of the second sheet part, penetrates . That part of the yoke which passes through the hole exhibits, between the inside of the yoke itself and the inside of the flange 2 of the first sheet part, an opening through which a screw 7 is inserted.
The screw 7, which may be equally replaced by a wedge, exerts a tensile force in the yoke 6 for the flange 4 of the second sheet part. Since, at the same time, the screw 7 makes contact, with pressure, with the flange 2 provided with a hole, the forces result in the hollow flange 2 being drawn towards the yoke flange 4. The yoke 6 is designed so as to exhibit resilient properties, the joint thus being pre- stressed and allowing a certain movement.
According to the invention, the hole 5 is punched out of the hollow flange 2 and is rectangular in shape. The yoke 6 is arranged by extracting a slitted part of the yoke flange 4 and thus has a rectangular cross section. There is no limita- tion to the shape of the hole or the yoke, but only the function of the yoke to penetrate the hole and become clamped is decisive. The joint is adapted to function in thin-sheet structures of up to 3 mm.

Claims

1. A joint for joining together a first sheet part (1) and a second sheet part (3), characterized in that a hole (5) is made through the first sheet part for penetration of a yoke (6) comprised in the second sheet part, whereby, when assembling the sheet parts, a wedge (7) is driven in between the yoke and the inside of the first sheet part, such that the wedge exerts a tensile force in the yoke (6) and a com- pressive force against the first sheet part (1) , the wedge thus locking the joint with prestress.
2. A joint according to claim 1, characterized in that the yoke (6) comprises a part extracted from a slitted part of the second sheet part (4) .
3. A joint according to claim 1 or 2 , characterized in that the first sheet part (1) comprises a folded-up flange (2), in which the hole (5) is provided, and that the second sheet part (3) comprises a folded-up flange
(4) which comprises the yoke (6) .
5. A method for joining together a first sheet part (1) and a second sheet part (3), characterized in that a through-hole (5) is made through the first sheet part and that a yoke (6) is arranged in the second sheet part, whereupon the yoke, by bringing the sheet parts together, is brought to penetrate the hole such that, between the yoke and the inside of the first sheet part, a hole is formed into which a wedge (7) is driven, whereby the wedge exerts a tensile force in the yoke and a compressive force against the first sheet part such that the joint is locked with prestress.
PCT/SE1998/000632 1997-04-07 1998-04-06 Sheet joint and a method for manufacture thereof WO1998045066A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU69358/98A AU6935898A (en) 1997-04-07 1998-04-06 Sheet joint and a method for manufacture thereof

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE9701297A SE509145C2 (en) 1997-04-07 1997-04-07 Sheet dressing and process for its manufacture
SE9701297-5 1997-04-07

Publications (2)

Publication Number Publication Date
WO1998045066A1 true WO1998045066A1 (en) 1998-10-15
WO1998045066A8 WO1998045066A8 (en) 1999-05-14

Family

ID=20406492

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SE1998/000632 WO1998045066A1 (en) 1997-04-07 1998-04-06 Sheet joint and a method for manufacture thereof

Country Status (3)

Country Link
AU (1) AU6935898A (en)
SE (1) SE509145C2 (en)
WO (1) WO1998045066A1 (en)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2815568A (en) * 1957-03-12 1957-12-10 Bianca Edoardo Ginseppe Process of joining or uniting metallic sheets
US4534092A (en) * 1980-07-16 1985-08-13 Alcan International Limited Apparatus for joining lengths of metal strip
GB2167463A (en) * 1984-11-15 1986-05-29 Nord Plan Staalreoler As A thin plate structure
WO1987002745A1 (en) * 1985-10-23 1987-05-07 Folksam Auto Ab Overlap adhesive joint

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2815568A (en) * 1957-03-12 1957-12-10 Bianca Edoardo Ginseppe Process of joining or uniting metallic sheets
US4534092A (en) * 1980-07-16 1985-08-13 Alcan International Limited Apparatus for joining lengths of metal strip
GB2167463A (en) * 1984-11-15 1986-05-29 Nord Plan Staalreoler As A thin plate structure
WO1987002745A1 (en) * 1985-10-23 1987-05-07 Folksam Auto Ab Overlap adhesive joint

Also Published As

Publication number Publication date
WO1998045066A8 (en) 1999-05-14
AU6935898A (en) 1998-10-30
SE509145C2 (en) 1998-12-07
SE9701297D0 (en) 1997-04-07
SE9701297L (en) 1998-10-08

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