EP2035161A1 - Method for making a shelf column and a shelf column - Google Patents

Method for making a shelf column and a shelf column

Info

Publication number
EP2035161A1
EP2035161A1 EP06764439A EP06764439A EP2035161A1 EP 2035161 A1 EP2035161 A1 EP 2035161A1 EP 06764439 A EP06764439 A EP 06764439A EP 06764439 A EP06764439 A EP 06764439A EP 2035161 A1 EP2035161 A1 EP 2035161A1
Authority
EP
European Patent Office
Prior art keywords
shelf column
shelf
band
thin metal
metal sheet
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
Application number
EP06764439A
Other languages
German (de)
French (fr)
Other versions
EP2035161A4 (en
EP2035161B1 (en
Inventor
Erkki Toivanen
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 EP2035161A1 publication Critical patent/EP2035161A1/en
Publication of EP2035161A4 publication Critical patent/EP2035161A4/en
Application granted granted Critical
Publication of EP2035161B1 publication Critical patent/EP2035161B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • B21D5/00—Bending sheet metal along straight lines, e.g. to form simple curves
    • B21D5/06—Bending sheet metal along straight lines, e.g. to form simple curves by drawing procedure making use of dies or forming-rollers, e.g. making profiles
    • B21D5/08—Bending sheet metal along straight lines, e.g. to form simple curves by drawing procedure making use of dies or forming-rollers, e.g. making profiles making use of forming-rollers
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47B—TABLES; DESKS; OFFICE FURNITURE; CABINETS; DRAWERS; GENERAL DETAILS OF FURNITURE
    • A47B96/00—Details of cabinets, racks or shelf units not covered by a single one of groups A47B43/00 - A47B95/00; General details of furniture
    • A47B96/14—Bars, uprights, struts, or like supports, for cabinets, brackets, or the like
    • A47B96/1408—Bars, uprights, struts, or like supports, for cabinets, brackets, or the like regularly perforated
    • 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
    • B21D39/02—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 by folding, e.g. connecting edges of a sheet to form a cylinder

Definitions

  • the invention relates to a method for making a shelf column in which method a shelf column mainly T-shaped in cross section and including a flange plate and mainly perpendicular to it a web plate and the necessary openings and/or holes for whereby to fasten the other shelf parts to the shelf column, which is made of thin metal sheet band using sheet technical methods and in which method the edges of the thin metal sheet are at least partly bent double with other parts of the sheet and such that when the bending has been completed the cross section of the thin metal sheet is mainly T-shaped and in which method a form joint is formed between the edges of the band of thin metal sheet in order to fasten the edges to each other.
  • the invention also relates to a method for making a shelf column in which method a shelf column mainly T-shaped in cross section and including a flange plate and mainly perpendicular to it a web plate and the necessary opening and/or holes for whereby to fasten the other parts of the shelves to the shelf column, which is made of thin metal sheet band using sheet technical methods and in which method the edges of the thin metal sheet are at least partly bent double with other parts of the sheet and such that when the bending has been completed the cross section of the thin metal sheet is mainly T-shaped and in which method a form joint is formed between the edges of the band of thin metal sheet in order to fasten the edges to each other.
  • a shelf column T-shaped in cross section is made of band-like thin metal sheet by bending the band double with respect to its longitudinal centreline and into a T-shape so that the edges of the band are opposite each other.
  • a usual method used in bending band is the roll forming method in which the band is bent stage by stage using pairs of forming rolls placed one after the other, but a basically similar T profile could, for example, be made using an edging press, a bending machine and/or with some other method suitable for bending thin metal sheet.
  • the wider bent edge is so much wider than the narrower bent edge that one can bend the wider edge as the bending stages suitably proceed to form the profile's web plate (that part of the profile which is perpendicular with respect to the flange plate). This takes place by first bending the end part of the wider bent edge (i.e. part of the web plate) first with respect to the rest of the wider bent edge into a perpendicular position and then bending this part approximately halfway along it 180° such that this part is also bent double. When this is done, the finished T profile's band edge with the wider bent edge is against the top surface of the unbent part of the band T against (i.e. this edge of the band in the finished T profile is located at where the web plate and flange plate meet).
  • the second half of the flange plate is made from the narrower bent edge of the band by bending it along its entire width 180°, i.e. doubling it against the unbent part.
  • All the necessary bend sections in the known art T profile have been chosen so that that edge of the band where the web plate and the flange plate meet on the edge adjacent to the wider bent edge, the said edge facing surface of the unbent part of the band in the finished T profile, is compressed against that edge of the band which is adjacent to the narrower bent edge.
  • band edge which is in the area of the lower portion of the web plate), which is adjacent to the edge bent wider, is formed slightly oblique so that it will be compressed against the band edge adjacent to edge, which has the narrower bend.
  • a shelf column with a T-shaped cross section further includes fastening holes formed into the web plate, whereby the shelf sheets can be mounted between the shelf columns can be fastened to the frame formed of shelf columns, and fastening holes formed into the web plate and flange plate whereby the partition walls between the shelves and the back plate can be mounted onto the shelf columns.
  • these openings and holes are pierced into the band raw material prior to roll forming the band to results in a T profile because the piercing an open profile would lead to it opening up during the piercing operation.
  • a problem with the present-day known art T-shaped shelf column is that the web plate and the flange plate are attached to each other at their point of contact merely by one sheet layer because the edges of the thin metal sheet band there are not in any contact with each other in the bent T profile. This reduces the twisting rigidity of the shelf column because the column is a so-called open profile element. Due to this, shelves are often flimsy and therefore for sufficient rigidity to be achieved it becomes necessary to use overly thick metal sheet in the manufacturing of shelf columns. This in turn increases the weight of the shelves and material costs, and makes their manufacturing more difficult.
  • Another problem in present-day shelf columns is that the fastening opening and holes implemented in the overlapping sheet layers do not often exactly coincide because they are made before the band is bent into the T shape. This causes reduction in the size of openings and holes, which in turn causes difficulties when the shelves are assembled.
  • the purpose of the present invention is to accomplish a method for making shelf columns whereby aforementioned problems associated with known art shelf columns made by bending a band of thin metal sheet to be T-shaped in cross section can be eliminated.
  • a particular purpose of the present invention is to demonstrate a method whereby a shelf column T-shaped in cross section and made from a band of thin metal sheet can be so manufactured that the resultant shelf column is significantly superior to known art shelf columns T-shaped in cross section in terms of twisting rigidity and which enables the forming of the necessary fastening openings and fastening holes into the shelf column so that the openings and holes in overlapping sheet layers will coincide.
  • a further purpose of the present invention is to demonstrate a shelf column in accordance with the method in accordance with the invention whereby disadvantages associated with present-day shelf columns are eliminated and which is advantageous to manufacture and which is structurally rigid.
  • the form joint is formed by bending locking bends into the edges of the band of thin metal sheet, these locking bends being bent to oppose each other in conjunction with the bending of the shelf column's T profile and this is also when the locking bends are fitted at least partly within each other and locked to each other. This enables such a form joint to be achieved that it's manufacturing mostly succeeds during the bending stages of the T profile of the shelf column.
  • a sealed profile is obtained from the T profile of the cross section of the shelf column, which results in considerably increasing the twisting rigidity of the shelf when compared to known art shelf columns formed using open profile elements. Consequently, a shelf column T-shaped in cross section in accordance with the present invention can be made us- ing a thinner band of metal sheet than known art shelf columns T-shaped in cross section and yet a shelf column in accordance with the invention is more rigid and stronger, and distinctly lighter than known art shelf columns.
  • the fastening openings and/or holes formed to this kind of a shelf column can be executed after the stages of bending necessary in forming an element T-shaped in cross section be- cause the attachment between the edges of the band of thin metal sheet prevents the profile from opening up during the piercing action.
  • the openings and holes executed into the sheet layers of the shelf column always coincide precisely and thereby the reduction in size of the fastening openings and/or holes in the separate sheet layers, which is typical of known art shelf columns because of the non-concentricity of the openings and/or holes, is avoided.
  • At least some of the bends necessary for the locking bends are made before commencing with the bending stages of the flange plate and/or at their initial stage, and the locking bends are locked to each other at the final stage of the stages of bending the flange plate and the web plate and/or after them.
  • This procedure enables maximum simplicity and efficacy to be achieved in forming the locking bends required for the form joint, and with little disturbance to the other bends necessary in forming the T profile.
  • a band of thin metal sheet is bent such that the form joint formed of the locking bends occurs in the joint area between the flange plate and the web plate in the finished shelf column.
  • seam depressions are formed in the web plate within this area in order to fit the form joint between the sheet layers located one on top of the other in the web plate.
  • This procedure results in a form joint of minimal prominence and of minimum obstruction with respect to the use of the finished shelf column, as well as resulting in a shelf column of maximum cross-sectional symmetry.
  • the joint area between the web plate and the flange plate is provided with several overlapping sheet layers, which considerably adds to the strength and rigidity of this section of the shelf column, which is subject to heavy loads, and makes it superior to the similar sections of known art shelf columns.
  • the shelf column in accordance with the invention is characterised in that the form joint includes the locking bends formed along the edges of the band of thin metal sheet, the said locking bends having been bent opposite each other concurrently with the bending of the T profile of the shelf column and being at least partly fitted within each other and locked to each other.
  • the twisting rigidity of this kind of a shelf column T-shaped in cross section is considerably greater than the twisting rigidity of known art shelf columns constructed to have an open profile. Consequently, a shelf column T-shaped in cross section can be made from a thinner band of metal sheet than known art shelf columns T-shaped in cross section and yet a shelf column in accordance with the invention is more rigid and stronger, and because of the lighter material distinctly lighter than known art shelf columns.
  • the necessary fastening openings and/or holes can be pierced into this kind of a shelf column after the bending of the T profile whereupon the openings and/or holes required for the different sheet layers will always precisely coincide with the corresponding fastening opening and/or ' hole location.
  • the locking bends which are part of form bend, are mainly U-shaped in cross section. Locking bends of this kind enable such a form joint to be achieved as is strong and readily manufactured in conjunction with the bending stages of the shelf column's T profile and the resultant form joint can be easily manufactured to be inconspicuous and not to hinder the installation of a shelf column.
  • the form joint is located in the web plate, in the joint area between the flange plate and the web plate.
  • a form joint thus placed increases the rigidity and strength of the shelf column, because the form joint results in multiple overlapping sheet layers being formed in the joint area between the flange plate and the web plate.
  • the shelf column has seam depressions formed in the band of thin metal sheet at the form joint. Because of the seam depressions, the form joint is implemented in the middle of doubled sheet layers of the band of thin metal sheet as a result of which the form j oint portion becomes symmetrical and of minimum conspicuousness .
  • the invention is depicted in more detail by referring to the attached figures, in which:
  • Fig. 1 shows an obliquely view from above of a shelf column in accordance with the invention
  • Fig. 2 shows an oblique view from above of the roll forming and piercing unit of a production line used in the making of the shelf column in accordance with Fig. 1;
  • Fig. 3 shows a basic Fig. setting out stages 1-14 of bending a shelf column in accordance with Fig. 1 as seen from the end of the shelf column;
  • Fig. 4 shows a basic Fig. setting out stages 15-22 of bending a shelf column in ac- cordance with Fig. 1 as seen from the end of the shelf column;
  • Fig. 5 shows an oblique view from above of a set of shelves assembled of the shelf columns illustrated in Figs. 1-4;
  • Fig. 6 shows an oblique view from above of another shelf column manufactured using a method in accordance with the invention.
  • the shelf column 17 in accordance with the invention and illustrated in Fig. 1 has been formed of a band of thin metal sheet 1, whose edges have been bent double against the unbent portion of the band remaining between them and such that a - horizontal flange plate 2 is formed in the shelf column and a horizontal web plate 3 is formed in its middle, mainly in a vertical position with respect to it.
  • the shelf column includes shelf sheets' fastening openings 4 and partition wall fastening holes 6 being executed into the web plate 3, and fastening holes 6 for the back plate being executed into the flange plate.
  • the shelf column in accordance with Fig. 1 is such that the edges of the band of thin metal sheet 1 have been fastened to each other by means of a form joint 7, which is located in the joint area between the flange plate 2 and the web plate 3.
  • the shelf column 17 in accordance with Fig. 1 is mainly made in a roll forming and piercing unit illustrated in Fig. 2.
  • the raw material for the shelf column consists of a band of thin metal sheet 1 on a reel, which is opened using a winding-off machine (not shown in Fig. 2) located at the front of a roll forming and piercing unit.
  • Roll forming part 20 is placed at the begin end of the roll forming and piercing unit, the said roll forming part 20 being used to bend the edges of the band of thin metal sheet 1 two fold with the other parts of the sheet such that the cross section of the band will be T-shaped as shown in Fig. 1. In this case, this takes place in 22 bending stages (i.e. using 22 form roll pairs).
  • a form joint 7 whereby the edges of the band fasten to each other is formed between the side edges of the band of thin metal sheet as the bending stages are executed.
  • the finished T profile is passed on to the piercing section 21 further on along the line where the hexagonal fastening openings 4 for the shelf sheets and the fastening holes 5 for the back plate and the fastening holes 6 for the side/partition walls are. executed on the web plate 3 of the T profile.
  • the ready finished shelf column band is cut to shelf columns of specified length by means of the cut-off de- vice (not illustrated in Fig. 2) following the roll forming and piercing unit along the production line.
  • the band winding-off machine, the roll forming and piercing unit 21, and the cut-off device are mainly known art as regards their operating principles and structure.
  • Roll forming part 20 of the roll forming and piercing unit also corresponds to known art T-shaped shelf column forming machines as regards its basic operating principles.
  • roll forming does differ from known art shelf column forming that the forming stages for form joint 7 have been added in connection with the bending stages for T profile forming.
  • the bending operations executed at different stages of roll forming are shown in Fig. 3 as regards their foremost features.
  • stages 3-7 launch the bending of the upper sheet layers 10 and 11 of the flange plate 2 in the direction of the unbent portion 12 of the band, the said unbent portion becoming the flange plate's lower sheet.
  • Stage 8 is when the seam depression 15 is formed near the edge of the " band, in the web plate's sheet layer 14.
  • bending of the flange plate's upper sheet layer 10 continues as Stages 9-13 towards the band's unbent portion 12, and bending of the web plate's sheet layer 14 begins such that it is turned towards sheet layer 13.
  • Stage 14 is when a seam depression 16 is formed in sheet layer 13. Then sheet layer 14 is more or less at a right angle to sheet layer 13 and the upper sheet layer 10 of the flange plate is against the band's unbent part 12. From here on, the bending continues as Stages 15-22 in the manner illustrated in Fig. 4, i.e. bending of sheet layer 14 of web plate 3 towards sheet layer 13 is continued at the same time as the flange plate's unbent portion 12 (and the upper sheet layer 10 of the flange plate opposite it) are turned towards the upper sheet layer of the flange plate.
  • Stage 20 both of the upper sheet layers 10 and 11 of the flange plate are against the unbent portion 12 of the flange plate, but sheet layer 14 of the web plate is still slightly open by a small angle with respect to sheet layer 13.
  • the final closing of the web plate's sheet layers takes place from here onwards, in Stages 20-22. This is when the locking bend 8 at the free end of the web plate's sheet layer 14 is turned into the locking bend 9 at the free end of the flange plate's upper sheet layer.
  • Stage 22 is when the locking bends 8 and 9 are compressed within each other and tightly against each other so that they become locked to each other.
  • the upper sheet layers are 10 and 11 of the flange plate 2 are against the band's unbent portion 12 and the sheet layers 13 and the 14 of the web plate 3 are opposite to each other.
  • Form joint 7 formed between the flange plate and the web plate as the result of locking bends 8 and 9 is between the seam depressions 15 and 16 in the joint area of the flange plate and the web plate such that the finished T profile is symmetrical in cross section and minimally conspicuous when viewing the web plate from the side.
  • FIG. 5 shows an example of this kind of a shelf unit having several shelf sheets 18 one on top of the other and assembled using shelf columns in accordance with Figs. 1-4.
  • the shelf columns 17 are installed such that their web plates 3 face each other.
  • the shelf sheets 18 to be mounted between the shelf columns 17 are fastened by means of the fastening openings 4 against the right-angled corners formed between the flange plate and 2 and the web plate 3 using the hook-like protrusions (not shown in Fig. 5) located at the end edges of the shelf sheets (generally formed of the sheet material of the shelf sheet).
  • a cross-like stiffening brace 19 (or a back sheet, for example) is fastened to the fastening holes 5 between the shelf col- umns at the back of the shelf unit to ensure that the shelf unit stays together and to - brace the shelves.
  • Sidewalls may also be fastened to the sides of the shelf unit (not illustrated in Fig. 5). The sidewalls serve as partitions between adjacent shelf compartments assuming that the shelves comprise several side-by-side fastened/set shelf units.
  • the side walls/partitions are fastened to the shelf columns by means of the fastening holes 6 for partitions located in the web plates.
  • Machine screws for example, can be used as the fastening items for side walls/partitions and the cross-like stiffening brace, but other suitable fastening items are also possible.
  • shelf column in accordance with the invention can be implemented deviating in many respects from the above application example.
  • shelf columns the feature that the sheet layers of the web plate and of the flange plate remain against each other is ensured by forming edge enclosures at the end of the web plate and at both ends of the flange plate, i.e. these being parts in which the overlapping sheet layers have so formed that they are separately from each other and thereby form an enclosure-like structure for this section.
  • edge enclosures of this kind can also be implemented in the shelf column in accordance with the invention.
  • Fig. 6 shows a shelf column, which corresponds to the application in accordance with Fig.
  • edge enclosures 30, 31 and 32 have been formed along the free edge of its web plate and along both edges of the flange plate. These edge enclosures further enable additional twisting rigidity and robustness to be achieved for the shelf column. In some further applications deviating from the preceding ones, the edge enclosure has been formed only along both edges of the flange plate or merely along the free edge of the web plate.
  • the form joint characteristic of a shelf column in accordance with the inventive method can be implemented in several different ways to that in the above example application. For example, the form, size and order of bending of the locking bends required for the form joint can be varied, depending on factors such as the thickness of the metal sheet used and the external dimensions of the shelf column. Moreover, the location of the form joint along the T profile can vary. In one shelf column in accordance with the invention the form joint has been placed along the free edge of the web plate. This solution enables it to be used to replace the edge enclosure formed along the edge of the web plate.

Abstract

The invention relates to a method for making a shelf column in which method a shelf column (17) mainly T-shaped in cross section and including a flange plate (2) and mainly perpendicular to it a web plate (3) and the necessary fastening openings (4) and/or holes (5, 6) for whereby to fasten the other shelf parts (18, 19) to the shelf column, which is made of a band thin metal sheet (1) using sheet technical methods and in which method the edges of the thin metal sheet (1) are at least partly bent double with other parts of the sheet and such that when the bending has been completed the cross section of the thin metal sheet is mainly T-shaped and in which method a form joint (7) is formed between the edges of the band of thin metal sheet (1) in order to fasten the edges to each other. The method in accordance with the invention is characterised in that the form joint (7) is formed by bending locking bends (8, 9) into the edges of the band of thin metal sheet (1), these locking bends. being bent to oppose each other in conjunction with the bending of the T profile of the shelf column (17) and the locking bends are fitted at least partly within each other and locked to each other. The invention also relates to a shelf column (17) manufactured in accordance with a method in accordance with the invention, the said shelf column including a form joint (7) formed between the edges of the band of thin metal sheet.

Description

METHOD FOR MAKING A SHELF COLUMN AND A SHELF COLUMN
The invention relates to a method for making a shelf column in which method a shelf column mainly T-shaped in cross section and including a flange plate and mainly perpendicular to it a web plate and the necessary openings and/or holes for whereby to fasten the other shelf parts to the shelf column, which is made of thin metal sheet band using sheet technical methods and in which method the edges of the thin metal sheet are at least partly bent double with other parts of the sheet and such that when the bending has been completed the cross section of the thin metal sheet is mainly T-shaped and in which method a form joint is formed between the edges of the band of thin metal sheet in order to fasten the edges to each other. The invention also relates to a method for making a shelf column in which method a shelf column mainly T-shaped in cross section and including a flange plate and mainly perpendicular to it a web plate and the necessary opening and/or holes for whereby to fasten the other parts of the shelves to the shelf column, which is made of thin metal sheet band using sheet technical methods and in which method the edges of the thin metal sheet are at least partly bent double with other parts of the sheet and such that when the bending has been completed the cross section of the thin metal sheet is mainly T-shaped and in which method a form joint is formed between the edges of the band of thin metal sheet in order to fasten the edges to each other.
Nowadays, a shelf column T-shaped in cross section is made of band-like thin metal sheet by bending the band double with respect to its longitudinal centreline and into a T-shape so that the edges of the band are opposite each other. A usual method used in bending band is the roll forming method in which the band is bent stage by stage using pairs of forming rolls placed one after the other, but a basically similar T profile could, for example, be made using an edging press, a bending machine and/or with some other method suitable for bending thin metal sheet.
It usually happens when bending a T-shaped shelf column in a roll forming machine is that the edges of the band are first bent with respect to the centreline of the band towards each other and so that the band's remaining unbent part (whose width is usually distinctly smaller than that of the bent parts) is left on the other side of the' centreline of the band with respect to the longitudinal centreline of the band, in which case the other bent edge becomes significantly wider than the other. Bending of the bent parts is continued further from this point on such that certain parts of the bent upper surfaces of edges eventually come against the upper surfaces of the unbent part of the band, meaning that a flange plate of the T profile is formed having two sheet layers one on top of the other. Usually the wider bent edge is so much wider than the narrower bent edge that one can bend the wider edge as the bending stages suitably proceed to form the profile's web plate (that part of the profile which is perpendicular with respect to the flange plate). This takes place by first bending the end part of the wider bent edge (i.e. part of the web plate) first with respect to the rest of the wider bent edge into a perpendicular position and then bending this part approximately halfway along it 180° such that this part is also bent double. When this is done, the finished T profile's band edge with the wider bent edge is against the top surface of the unbent part of the band T against (i.e. this edge of the band in the finished T profile is located at where the web plate and flange plate meet). The second half of the flange plate is made from the narrower bent edge of the band by bending it along its entire width 180°, i.e. doubling it against the unbent part. All the necessary bend sections in the known art T profile have been chosen so that that edge of the band where the web plate and the flange plate meet on the edge adjacent to the wider bent edge, the said edge facing surface of the unbent part of the band in the finished T profile, is compressed against that edge of the band which is adjacent to the narrower bent edge. Usually that band edge (which is in the area of the lower portion of the web plate), which is adjacent to the edge bent wider, is formed slightly oblique so that it will be compressed against the band edge adjacent to edge, which has the narrower bend. In this way the sheet layers of the web plate can be made to be compressed against each other so that they will not open up to be separated from each other as a result of the effect of back-springing, also referred to . as crease stiffness, which is typical of thin metal sheet. There have been endeavours to mitigate the effects of the aforementioned back-springing, or crease stiffness, in known art shelf columns by implementing edge enclosures along the web plate and flange plate edges (i.e. these being areas where the sheet layers have been formed separate from one another). A shelf column with a T-shaped cross section further includes fastening holes formed into the web plate, whereby the shelf sheets can be mounted between the shelf columns can be fastened to the frame formed of shelf columns, and fastening holes formed into the web plate and flange plate whereby the partition walls between the shelves and the back plate can be mounted onto the shelf columns. In present-day known art shelf columns these openings and holes are pierced into the band raw material prior to roll forming the band to results in a T profile because the piercing an open profile would lead to it opening up during the piercing operation.
A problem with the present-day known art T-shaped shelf column is that the web plate and the flange plate are attached to each other at their point of contact merely by one sheet layer because the edges of the thin metal sheet band there are not in any contact with each other in the bent T profile. This reduces the twisting rigidity of the shelf column because the column is a so-called open profile element. Due to this, shelves are often flimsy and therefore for sufficient rigidity to be achieved it becomes necessary to use overly thick metal sheet in the manufacturing of shelf columns. This in turn increases the weight of the shelves and material costs, and makes their manufacturing more difficult. Another problem in present-day shelf columns is that the fastening opening and holes implemented in the overlapping sheet layers do not often exactly coincide because they are made before the band is bent into the T shape. This causes reduction in the size of openings and holes, which in turn causes difficulties when the shelves are assembled.
The purpose of the present invention is to accomplish a method for making shelf columns whereby aforementioned problems associated with known art shelf columns made by bending a band of thin metal sheet to be T-shaped in cross section can be eliminated. A particular purpose of the present invention is to demonstrate a method whereby a shelf column T-shaped in cross section and made from a band of thin metal sheet can be so manufactured that the resultant shelf column is significantly superior to known art shelf columns T-shaped in cross section in terms of twisting rigidity and which enables the forming of the necessary fastening openings and fastening holes into the shelf column so that the openings and holes in overlapping sheet layers will coincide. A further purpose of the present invention is to demonstrate a shelf column in accordance with the method in accordance with the invention whereby disadvantages associated with present-day shelf columns are eliminated and which is advantageous to manufacture and which is structurally rigid.
The purposes of the invention will be achieved by applying the method for manufacturing the said shelf column and by means of the shelf column characterised as presented in the attached claims.
When applying the method in accordance with the invention, the form joint is formed by bending locking bends into the edges of the band of thin metal sheet, these locking bends being bent to oppose each other in conjunction with the bending of the shelf column's T profile and this is also when the locking bends are fitted at least partly within each other and locked to each other. This enables such a form joint to be achieved that it's manufacturing mostly succeeds during the bending stages of the T profile of the shelf column. For example, when forming a T profile using roll forming, forming locking bends of this kind and locking them to each other does not really add to the number of necessary forming stages nor does it slow down the manufacturing of the shelf column nor does it increase the manufacturing costs because the majority of the forming stages related to locking bends can be made concurrently with the stages of forming stages the T profile.
When using the method in accordance with the invention, a sealed profile is obtained from the T profile of the cross section of the shelf column, which results in considerably increasing the twisting rigidity of the shelf when compared to known art shelf columns formed using open profile elements. Consequently, a shelf column T-shaped in cross section in accordance with the present invention can be made us- ing a thinner band of metal sheet than known art shelf columns T-shaped in cross section and yet a shelf column in accordance with the invention is more rigid and stronger, and distinctly lighter than known art shelf columns. Further, the fastening openings and/or holes formed to this kind of a shelf column can be executed after the stages of bending necessary in forming an element T-shaped in cross section be- cause the attachment between the edges of the band of thin metal sheet prevents the profile from opening up during the piercing action. When implementing this method, the openings and holes executed into the sheet layers of the shelf column always coincide precisely and thereby the reduction in size of the fastening openings and/or holes in the separate sheet layers, which is typical of known art shelf columns because of the non-concentricity of the openings and/or holes, is avoided.
In an application of the method in accordance with the invention, at least some of the bends necessary for the locking bends are made before commencing with the bending stages of the flange plate and/or at their initial stage, and the locking bends are locked to each other at the final stage of the stages of bending the flange plate and the web plate and/or after them. This procedure enables maximum simplicity and efficacy to be achieved in forming the locking bends required for the form joint, and with little disturbance to the other bends necessary in forming the T profile.
In an application of the method in accordance with the invention, a band of thin metal sheet is bent such that the form joint formed of the locking bends occurs in the joint area between the flange plate and the web plate in the finished shelf column. Further, seam depressions are formed in the web plate within this area in order to fit the form joint between the sheet layers located one on top of the other in the web plate. This procedure results in a form joint of minimal prominence and of minimum obstruction with respect to the use of the finished shelf column, as well as resulting in a shelf column of maximum cross-sectional symmetry. Further, the joint area between the web plate and the flange plate is provided with several overlapping sheet layers, which considerably adds to the strength and rigidity of this section of the shelf column, which is subject to heavy loads, and makes it superior to the similar sections of known art shelf columns.
The shelf column in accordance with the invention is characterised in that the form joint includes the locking bends formed along the edges of the band of thin metal sheet, the said locking bends having been bent opposite each other concurrently with the bending of the T profile of the shelf column and being at least partly fitted within each other and locked to each other. As result of the form joint between the edges, the twisting rigidity of this kind of a shelf column T-shaped in cross section is considerably greater than the twisting rigidity of known art shelf columns constructed to have an open profile. Consequently, a shelf column T-shaped in cross section can be made from a thinner band of metal sheet than known art shelf columns T-shaped in cross section and yet a shelf column in accordance with the invention is more rigid and stronger, and because of the lighter material distinctly lighter than known art shelf columns. Further, the necessary fastening openings and/or holes can be pierced into this kind of a shelf column after the bending of the T profile whereupon the openings and/or holes required for the different sheet layers will always precisely coincide with the corresponding fastening opening and/or ' hole location.
In an application of the shelf column in accordance with the invention, the locking bends, which are part of form bend, are mainly U-shaped in cross section. Locking bends of this kind enable such a form joint to be achieved as is strong and readily manufactured in conjunction with the bending stages of the shelf column's T profile and the resultant form joint can be easily manufactured to be inconspicuous and not to hinder the installation of a shelf column.
In an application of the shelf column in accordance with the invention, the form joint is located in the web plate, in the joint area between the flange plate and the web plate. A form joint thus placed increases the rigidity and strength of the shelf column, because the form joint results in multiple overlapping sheet layers being formed in the joint area between the flange plate and the web plate.
In an application of the shelf column in accordance with the invention, the shelf column has seam depressions formed in the band of thin metal sheet at the form joint. Because of the seam depressions, the form joint is implemented in the middle of doubled sheet layers of the band of thin metal sheet as a result of which the form j oint portion becomes symmetrical and of minimum conspicuousness . In the following, the invention is depicted in more detail by referring to the attached figures, in which:
Fig. 1 shows an obliquely view from above of a shelf column in accordance with the invention;
Fig. 2 shows an oblique view from above of the roll forming and piercing unit of a production line used in the making of the shelf column in accordance with Fig. 1;
Fig. 3 shows a basic Fig. setting out stages 1-14 of bending a shelf column in accordance with Fig. 1 as seen from the end of the shelf column;
Fig. 4 shows a basic Fig. setting out stages 15-22 of bending a shelf column in ac- cordance with Fig. 1 as seen from the end of the shelf column;
Fig. 5 shows an oblique view from above of a set of shelves assembled of the shelf columns illustrated in Figs. 1-4; and
Fig. 6 shows an oblique view from above of another shelf column manufactured using a method in accordance with the invention.
The shelf column 17 in accordance with the invention and illustrated in Fig. 1 has been formed of a band of thin metal sheet 1, whose edges have been bent double against the unbent portion of the band remaining between them and such that a - horizontal flange plate 2 is formed in the shelf column and a horizontal web plate 3 is formed in its middle, mainly in a vertical position with respect to it. Further, the shelf column includes shelf sheets' fastening openings 4 and partition wall fastening holes 6 being executed into the web plate 3, and fastening holes 6 for the back plate being executed into the flange plate. Further, the shelf column in accordance with Fig. 1 is such that the edges of the band of thin metal sheet 1 have been fastened to each other by means of a form joint 7, which is located in the joint area between the flange plate 2 and the web plate 3.
The shelf column 17 in accordance with Fig. 1 is mainly made in a roll forming and piercing unit illustrated in Fig. 2. The raw material for the shelf column consists of a band of thin metal sheet 1 on a reel, which is opened using a winding-off machine (not shown in Fig. 2) located at the front of a roll forming and piercing unit. Roll forming part 20 is placed at the begin end of the roll forming and piercing unit, the said roll forming part 20 being used to bend the edges of the band of thin metal sheet 1 two fold with the other parts of the sheet such that the cross section of the band will be T-shaped as shown in Fig. 1. In this case, this takes place in 22 bending stages (i.e. using 22 form roll pairs). Further, a form joint 7 whereby the edges of the band fasten to each other is formed between the side edges of the band of thin metal sheet as the bending stages are executed. On completion of the roll-forming stage, the finished T profile is passed on to the piercing section 21 further on along the line where the hexagonal fastening openings 4 for the shelf sheets and the fastening holes 5 for the back plate and the fastening holes 6 for the side/partition walls are. executed on the web plate 3 of the T profile. Finally, the ready finished shelf column band is cut to shelf columns of specified length by means of the cut-off de- vice (not illustrated in Fig. 2) following the roll forming and piercing unit along the production line. The band winding-off machine, the roll forming and piercing unit 21, and the cut-off device are mainly known art as regards their operating principles and structure. Roll forming part 20 of the roll forming and piercing unit also corresponds to known art T-shaped shelf column forming machines as regards its basic operating principles. However, roll forming does differ from known art shelf column forming that the forming stages for form joint 7 have been added in connection with the bending stages for T profile forming. The bending operations executed at different stages of roll forming are shown in Fig. 3 as regards their foremost features.
As is shown in Fig. 3, locking bends 8 and 9 are formed in the band of thin metal sheet 1 in the first two stages. Following this, stages 3-7 launch the bending of the upper sheet layers 10 and 11 of the flange plate 2 in the direction of the unbent portion 12 of the band, the said unbent portion becoming the flange plate's lower sheet. At this stage, the overlapping sheet layers 13 and 14 forming the web plate 3 are still unbent. Stage 8 is when the seam depression 15 is formed near the edge of the" band, in the web plate's sheet layer 14. After this, bending of the flange plate's upper sheet layer 10 continues as Stages 9-13 towards the band's unbent portion 12, and bending of the web plate's sheet layer 14 begins such that it is turned towards sheet layer 13. Stage 14 is when a seam depression 16 is formed in sheet layer 13. Then sheet layer 14 is more or less at a right angle to sheet layer 13 and the upper sheet layer 10 of the flange plate is against the band's unbent part 12. From here on, the bending continues as Stages 15-22 in the manner illustrated in Fig. 4, i.e. bending of sheet layer 14 of web plate 3 towards sheet layer 13 is continued at the same time as the flange plate's unbent portion 12 (and the upper sheet layer 10 of the flange plate opposite it) are turned towards the upper sheet layer of the flange plate. In Stage 20 both of the upper sheet layers 10 and 11 of the flange plate are against the unbent portion 12 of the flange plate, but sheet layer 14 of the web plate is still slightly open by a small angle with respect to sheet layer 13. The final closing of the web plate's sheet layers takes place from here onwards, in Stages 20-22. This is when the locking bend 8 at the free end of the web plate's sheet layer 14 is turned into the locking bend 9 at the free end of the flange plate's upper sheet layer. Stage 22 is when the locking bends 8 and 9 are compressed within each other and tightly against each other so that they become locked to each other. In a finished shelf column, the upper sheet layers are 10 and 11 of the flange plate 2 are against the band's unbent portion 12 and the sheet layers 13 and the 14 of the web plate 3 are opposite to each other. Form joint 7 formed between the flange plate and the web plate as the result of locking bends 8 and 9 is between the seam depressions 15 and 16 in the joint area of the flange plate and the web plate such that the finished T profile is symmetrical in cross section and minimally conspicuous when viewing the web plate from the side.
The shelf columns as shown in Figs. 1-4 can be used to assemble a shelf unit in a manner matching known art shelf columns. Fig. 5 shows an example of this kind of a shelf unit having several shelf sheets 18 one on top of the other and assembled using shelf columns in accordance with Figs. 1-4. When assembling the shelf unit in accordance with Fig. 5, the shelf columns 17 are installed such that their web plates 3 face each other. The shelf sheets 18 to be mounted between the shelf columns 17 are fastened by means of the fastening openings 4 against the right-angled corners formed between the flange plate and 2 and the web plate 3 using the hook-like protrusions (not shown in Fig. 5) located at the end edges of the shelf sheets (generally formed of the sheet material of the shelf sheet). A cross-like stiffening brace 19 (or a back sheet, for example) is fastened to the fastening holes 5 between the shelf col- umns at the back of the shelf unit to ensure that the shelf unit stays together and to - brace the shelves. Sidewalls may also be fastened to the sides of the shelf unit (not illustrated in Fig. 5). The sidewalls serve as partitions between adjacent shelf compartments assuming that the shelves comprise several side-by-side fastened/set shelf units. The side walls/partitions are fastened to the shelf columns by means of the fastening holes 6 for partitions located in the web plates. Machine screws, for example, can be used as the fastening items for side walls/partitions and the cross-like stiffening brace, but other suitable fastening items are also possible.
The method and shelf column in accordance with the invention can be implemented deviating in many respects from the above application example. In known art shelf columns the feature that the sheet layers of the web plate and of the flange plate remain against each other is ensured by forming edge enclosures at the end of the web plate and at both ends of the flange plate, i.e. these being parts in which the overlapping sheet layers have so formed that they are separately from each other and thereby form an enclosure-like structure for this section. If so desired, edge enclosures of this kind can also be implemented in the shelf column in accordance with the invention. Fig. 6 shows a shelf column, which corresponds to the application in accordance with Fig. 1 in other respects, but edge enclosures 30, 31 and 32 have been formed along the free edge of its web plate and along both edges of the flange plate. These edge enclosures further enable additional twisting rigidity and robustness to be achieved for the shelf column. In some further applications deviating from the preceding ones, the edge enclosure has been formed only along both edges of the flange plate or merely along the free edge of the web plate. Furthermore, by way of an example, the form joint characteristic of a shelf column in accordance with the inventive method can be implemented in several different ways to that in the above example application. For example, the form, size and order of bending of the locking bends required for the form joint can be varied, depending on factors such as the thickness of the metal sheet used and the external dimensions of the shelf column. Moreover, the location of the form joint along the T profile can vary. In one shelf column in accordance with the invention the form joint has been placed along the free edge of the web plate. This solution enables it to be used to replace the edge enclosure formed along the edge of the web plate.
The invention is not delimited to the presented preferable applications; instead, it can vary within the scope of the inventive idea as set out in the attached claims.

Claims

1. A method for manufacturing a shelf column in which method a shelf column (17) mainly T-shaped in cross section and including a flange plate (2) and mainly perpendicular to it a web plate (3) and the necessary openings (4) and/or holes (5, 6) for whereby to fasten the other shelf parts (18, 19) to the shelf column, which is made of thin metal sheet band (1) using sheet technical methods and in which method the edges of the thin metal sheet (1) are at least partly bent double with other parts of the sheet and such that when the bending of the thin metal sheet (1) has been completed the cross section of the thin metal sheet is mainly T-shaped and in which method a form joint (7) is formed between the edges for the purpose of fastening the edges to each other, characterised in that the form joint (7) is formed by bending locking bends (8, 9) in the edges of the band of thin metal sheet (1), the said locking bends (8, 9) being bent when bending the shelf column's (17) T profile to be opposite to each other and such that they are fitted to be at least partly within each other and locked to each other.
2. A method in accordance with claim 1, characterised in that at least some of the bends necessary for the locking bends (8, 9) are made before commencing with the bending stages of the flange plate (2) and of the web plate (3) and/or at their initial stage, and that the locking bends (8, 9) are locked to each other at the final stage of the stages of bending the flange plate and the web plate and/or after them.
3. A method in accordance with claim 1 or 2, characterised in that that the band of thin metal sheet (1) is bent so that the form joint (7) formed of the locking bends (8, 9) will occur in the finished shelf column (17) within the joint area located between the flange plate (2) and the web plate (3) and that the seam depressions (15, 16) are formed in the web plate (3) within this area to fit the form joint between sheet layers (13, 14) overlapping each other on the web plate.
4. A method in accordance with any of claims 1-3, characterised in that that a band of thin metal sheet (1) is bent to form a shelf column band mainly T-shaped in cross section by means of roll forming and that the fastening openings (4) and/or fasten- ing holes (5, 6) necessary for the shelf column (17) are pierced into the shelf column band after the roll-forming stage.
5. A method in accordance with any of claims 1-4, characterised in that that the band of thin metal sheet, whose shaping and piercing has been completed, is cut to result in shelf columns (17) of the desired length after the forming stages and piercing.
6. A shelf column (17) mainly T-shaped in cross section and including a flange plate (2) and mainly perpendicular to it a web plate (3) and the necessary openings (4) and/or holes (5, 6) for whereby to fasten the other shelf parts (18, 19) to the shelf column, and which shelf column (17) is made of thin metal sheet band (1) at least partly bent double and mainly T-shaped in cross section using sheet technical methods and in which shelf column (17) has a form joint (7) between the edges of the thin metal sheet (1) for the purpose of fastening the edges to each other, character- ised in that the form joint (7) includes locking bends (8, 9) formed along the edges of the band of thin metal sheet (1), the said locking bends (8, 9) being bent when bending the shelf column's (17) T profile to be opposite to each other and such that they are fitted to be at least partly within each other and locked to each other.
7. A shelf column in accordance with claim 6, characterised in that the locking bends (8, 9) are mainly U-shaped in cross section.
8. A shelf column in accordance with claim 6 or 7, characterised in that the form joint (7) is located in the web plate (3), within the joint area between the flange plate (2) and the web plate (3).
9. A shelf column in accordance with any of the claims 6-8, characterised in that the shelf column (17) has seam depressions (15, 16) formed in the band of thin metal sheet (1) where the form joint (7) is.
EP06764439.3A 2006-06-19 2006-06-19 Method for making a shelf column and a shelf column Active EP2035161B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/FI2006/000213 WO2008003813A1 (en) 2006-06-19 2006-06-19 Method for making a shelf column and a shelf column

Publications (3)

Publication Number Publication Date
EP2035161A1 true EP2035161A1 (en) 2009-03-18
EP2035161A4 EP2035161A4 (en) 2013-03-13
EP2035161B1 EP2035161B1 (en) 2013-09-18

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WO (1) WO2008003813A1 (en)

Families Citing this family (4)

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Publication number Priority date Publication date Assignee Title
EP2690988B1 (en) * 2011-03-31 2018-03-07 Finger Lakes Intellectual Property, LLC Unitary t-shaped bed frame member
DE102016205605A1 (en) * 2016-04-05 2017-10-05 Peri Gmbh bars
GB201620745D0 (en) 2016-12-06 2017-01-18 Ge Oil & Gas Uk Ltd immobilised insert
AT521757B1 (en) * 2018-09-28 2021-05-15 Slavonia Baubedarf Gmbh Support profile for a facade construction

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GB2026586A (en) * 1978-07-31 1980-02-06 Donn Prod Inc Grid tee for suspension ceilings or the like
DE3525139A1 (en) * 1985-07-13 1987-01-15 Richter System Gmbh & Co Kg Supporting rail for ceiling coverings
EP0940514A2 (en) * 1998-03-04 1999-09-08 USG INTERIORS, Inc. Grid tee with integrally stitched web
DE20201572U1 (en) * 2002-02-02 2002-06-27 Richter System Gmbh & Co Kg T-profile made of sheet metal

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GB846315A (en) * 1956-10-17 1960-08-31 Sergram Improvements in and relating to metalic box sections
BE755358A (en) * 1969-08-28 1971-02-01 Rapena Patent & Verwaltungs Ag
US5088309A (en) * 1990-04-23 1992-02-18 Knudson Gary Art Rotary punch
GB2274080B (en) * 1993-01-08 1995-09-06 Armstrong World Ind Inc Ceiling runners and process for producing same

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GB2026586A (en) * 1978-07-31 1980-02-06 Donn Prod Inc Grid tee for suspension ceilings or the like
DE3525139A1 (en) * 1985-07-13 1987-01-15 Richter System Gmbh & Co Kg Supporting rail for ceiling coverings
EP0940514A2 (en) * 1998-03-04 1999-09-08 USG INTERIORS, Inc. Grid tee with integrally stitched web
DE20201572U1 (en) * 2002-02-02 2002-06-27 Richter System Gmbh & Co Kg T-profile made of sheet metal

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Also Published As

Publication number Publication date
WO2008003813A1 (en) 2008-01-10
EP2035161A4 (en) 2013-03-13
EP2035161B1 (en) 2013-09-18

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