EP1503027B1 - Section predisposed for bending and frame made from a single piece of such a section - Google Patents
Section predisposed for bending and frame made from a single piece of such a section Download PDFInfo
- Publication number
- EP1503027B1 EP1503027B1 EP03425507A EP03425507A EP1503027B1 EP 1503027 B1 EP1503027 B1 EP 1503027B1 EP 03425507 A EP03425507 A EP 03425507A EP 03425507 A EP03425507 A EP 03425507A EP 1503027 B1 EP1503027 B1 EP 1503027B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- section
- bending
- base side
- accordance
- predisposed
- 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.)
- Expired - Lifetime
Links
- 238000005452 bending Methods 0.000 title claims abstract description 45
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 238000009877 rendering Methods 0.000 abstract 1
- 239000000463 material Substances 0.000 description 4
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000003801 milling Methods 0.000 description 2
- 238000009827 uniform distribution Methods 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 229910001092 metal group alloy Inorganic materials 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 230000003313 weakening effect Effects 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
- E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
- E06B3/00—Window sashes, door leaves, or like elements for closing wall or like openings; Layout of fixed or moving closures, e.g. windows in wall or like openings; Features of rigidly-mounted outer frames relating to the mounting of wing frames
- E06B3/96—Corner joints or edge joints for windows, doors, or the like frames or wings
-
- E—FIXED CONSTRUCTIONS
- E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
- E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
- E06B3/00—Window sashes, door leaves, or like elements for closing wall or like openings; Layout of fixed or moving closures, e.g. windows in wall or like openings; Features of rigidly-mounted outer frames relating to the mounting of wing frames
- E06B3/66—Units comprising two or more parallel glass or like panes permanently secured together
- E06B3/673—Assembling the units
- E06B3/67304—Preparing rigid spacer members before assembly
- E06B3/67308—Making spacer frames, e.g. by bending or assembling straight sections
- E06B3/67313—Making spacer frames, e.g. by bending or assembling straight sections by bending
Definitions
- the present invention relates in general to structures and frames made from sections and, more particularly, to a section predisposed for bending and to a frame made from a single piece of section.
- Structures and frames made from sections are widely used in many sectors of industrial production.
- four segments of one and the same section with their ends cut at 45° joined together to form a frame are often used to form the frame structure of a box-like container or the frame of a closing panel or a door.
- Specific coupling or fixing means are needed to join the four segments together, their assembly is relatively laborious and the accuracy of the joined pieces depends to a large extent on the accuracy of the assembly operations.
- the frame structure or the frame have sharp and almost cutting edges, and this is in contrast with accident-prevention regulations.
- One aim of the present invention is to make available a section predisposed for bending that will make it possible to construct structures and frames with the use of few and non-specific coupling means and assure a very precise assembly without any particular precautions.
- Another aim is to render possible the fabrication of structures and frames with a single piece of section predisposed for bending.
- Yet another aim of the invention is to render possible the fabrication of structures and frames that will be devoid of sharp angles at corners and along the edges.
- the sections capable of being used for implementing the invention shown in Figures 1 and 2 both have a flat base side 10, two lateral wings 11 that extend at right angles from the edges of the base side and other variously orientated straight or curved wings or ribs that, together with the base side and the lateral wings, define the body of the section.
- the body of the section encloses closed longitudinal spaces and has edges and prominences that extend towards the interior and the exterior of the spaces and have the function of accommodating and/or supporting accessories of various types (hinges, locks, gaskets, etc.).
- the sections are preferably made of some metal alloy, an aluminium alloy for example, that can be readily extruded, has relatively good mechanical stretching characteristics and is easily worked by means of tools.
- a section of the type shown in Figure 1 is predisposed for bending along a transverse line of the base side by means of mechanical processing to produce a local weakening. More particularly, a cut is made in accordance with a first pre-determined angle (45° in the example) with respect to the plane of the base side 10 and a second cut in accordance with a second pre-determined angle (135° in the example) with respect to said plane, thereby removing material from the body of the section.
- the vertex of the V-notch produced in this way forms an incision on the internal face of the base side.
- the dash-dotted lines in Figure 3c define the vertex of the V-notch and the broken line indicates the plane that delimits the internal face of the base plane.
- the incision is enlarged by means of milling machine in such a way as to obtain a groove of a substantially square section.
- the groove has a bottom face 20 and two side walls 30, 30' at right angles to the base side that form, respectively, a sharp angle 32 and a smoothed or rounded angle 33 with the bottom face.
- the angles of the V-notches are chosen according to the bending angle, i.e. the angle the section is required to assume after the bending. In the illustrated example, obviously, a right angle is obtained after the bending.
- the depth of the incision and the groove and the width of the groove are chosen on the basis of the bending angle and the mechanical characteristics of the material (elongation, elasticity). In one practical case the base side has a thickness of 2.5 mm and the groove has a depth of 1.0 mm and a width of 4.5 mm.
- the shape of the groove is of decisive importance for obtaining an accurate bend with a uniform distribution of the deformations of the base side in the region of the bend, i.e. in the region delimited by the bottom of the groove.
- the deformation of the material begins along a well defined line, namely that of the sharp corner 32, and then extends gradually and uniformly right up to the rounded corner 33. Thanks to the uniform distribution of the deformations, the material remains integral and compact in the bending region and that makes it possible to bend even painted sections without the layer of paint becoming detached or cracked due to the effect of the bending stresses. Furthermore, the bending can be performed with the greatest precision without having to use special equipment to control the bending angle.
- a preferred application of the section predisposed for bending in accordance with the invention envisages four notches to obtain bending angles of 90° separated from each other in such a way as to form a rectangular frame after the bending.
- each side of the frame after the bending is affected by the shape of the grooves that delimit it; more particularly, considering a generic side of the frame, its length after the bending depends on the orientation of each of the grooves that delimit it: when one or the other of these grooves is oriented with its sharp angle closer to a predetermined reference point within the side than the rounded angle, i.e.
- the side in question will be shorter than it would be if the sharp angle were "outside the side", i.e. further removed from the reference point than the rounded angle. Therefore, whenever the junction point has to be situated exactly at the centre of a side, the side in question has to be delimited by grooves that either have both their sharp angles within the side or both the sharp angles outside thereof. Naturally, if a perfectly rectangular frame is to be obtained, it is essential that the distance between the grooves of the side opposite to the one with the joint should be reduced or increased in a corresponding manner.
- the side BC and the side DE will be affected in the same manner by the shape of the grooves that delimit them, so that the distance between the grooves B and C and the distance between the grooves D and E must be equal if one wants the two opposite sides BC and DE to be equal after the bending;
- the amount of the difference will be determined in each case on the basis of the dimensions of the section and the grooves.
- FIG. 5 A particularly advantageous manner of closing the frame is illustrated by Figure 5 and Figures 6a to 6c.
- a milling operation is performed in proximity of one of the ends of the section in order to remove a part of the structure that delimits the channel 15 and to form a space 50 into which there can be inserted the entire length of a self-threading screw 51 and a tool for turning this screw.
- the passage constituted by the channel segment that extends from the space 50 to the nearby end of the section is then enlarged in such a way as to make it possible for the screw to be inserted into it.
- the position of the space 50 and the length of the screw are chosen in such a manner that the screw may project beyond the end of the section, as shown in Figure 6c.
- the screw 51 is screwed, if necessary by means of an articulated screw driver (schematically shown in Figures 5 and 6a), into the channel 15 that opens onto the end of the section opposite to the one with the screw, until the joint is completely tight.
- the bending may be preceded by making a hole at right angles to the plane of the base side in proximity of each of the bending regions and, more precisely, at a distance from the bending region such that, following the bending, it will be aligned with the channel 15 of the body.
- a self-threading screw 17 is then screwed into the channel 15 until it becomes tight with its head flush against an internal wing of the body ( Figure 7a). If the section used is the one shown in Figure 2, it will be best to use two screws both for closing the frame and also for any stiffening thereof, naturally after having formed two spaces for inserting the screws that are to be screwed into the respective longitudinal channels.
- the section predisposed for bending in accordance with the invention makes it possible to fabricate frames and framed structures without the use of special equipment for the bending, because this operation is performed manually, and without the use of specific fixing means, because this operation is carried out by using only one or more self-threading screws for closing and possibly also stiffening (the frame). Furthermore, thanks to the conformation of the bending notches, the bending radius is always uniform, so that the section may be painted before it is bent; rather, in the greater part of cases it may be painted even before the various machining operations.
- the section may be predisposed for bending it through angles other than a right angle and, as regards the closing and the stiffening of the frames, traditional means can be used in place of those here illustrated.
Landscapes
- Engineering & Computer Science (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Mirrors, Picture Frames, Photograph Stands, And Related Fastening Devices (AREA)
- Joining Of Corner Units Of Frames Or Wings (AREA)
- Mutual Connection Of Rods And Tubes (AREA)
- Bending Of Plates, Rods, And Pipes (AREA)
- Diaphragms For Electromechanical Transducers (AREA)
Abstract
Description
- The present invention relates in general to structures and frames made from sections and, more particularly, to a section predisposed for bending and to a frame made from a single piece of section.
- Structures and frames made from sections are widely used in many sectors of industrial production. In the fabrication of containers for electric or electronic equipment, for example, four segments of one and the same section with their ends cut at 45° joined together to form a frame are often used to form the frame structure of a box-like container or the frame of a closing panel or a door. Specific coupling or fixing means are needed to join the four segments together, their assembly is relatively laborious and the accuracy of the joined pieces depends to a large extent on the accuracy of the assembly operations. Furthermore, the frame structure or the frame have sharp and almost cutting edges, and this is in contrast with accident-prevention regulations.
- One aim of the present invention is to make available a section predisposed for bending that will make it possible to construct structures and frames with the use of few and non-specific coupling means and assure a very precise assembly without any particular precautions.
- Another aim is to render possible the fabrication of structures and frames with a single piece of section predisposed for bending.
- Yet another aim of the invention is to render possible the fabrication of structures and frames that will be devoid of sharp angles at corners and along the edges.
- The invention will be more clearly understood from the description about to be given of an embodiment thereof, which is given by way of example and is not to be considered limitative in any way, the description making reference to the attached drawings, of which:
- Figures 1 and 2 show cross sections through two sections that lend themselves to being used for implementing the invention;
- Figures 3a and 3b show, respectively in section and in plan, a portion of a section predisposed for bending in accordance with the invention;
- Figure 3c shows an enlarged detail of Figure 3a;
- Figure 4 shows a section predisposed for bending at four points for the fabrication of a frame in accordance with the invention and comprises the enlarged views of four details of the section at the bending points;
- Figure 5 shows a front elevation of a frame in accordance with the invention;
- Figures 6a, 6b and 6c show, respectively, a front elevation, a section and a view from the low of a detail of the frame of Figure 5;
- Figures 7a, 7b and 7c show, respectively, a front elevation, a view from above and a section of another detail of the frame in accordance with Figure 5.
- Referring to the figures, the sections capable of being used for implementing the invention shown in Figures 1 and 2 both have a
flat base side 10, twolateral wings 11 that extend at right angles from the edges of the base side and other variously orientated straight or curved wings or ribs that, together with the base side and the lateral wings, define the body of the section. In the shown examples the body of the section encloses closed longitudinal spaces and has edges and prominences that extend towards the interior and the exterior of the spaces and have the function of accommodating and/or supporting accessories of various types (hinges, locks, gaskets, etc.). - The sections are preferably made of some metal alloy, an aluminium alloy for example, that can be readily extruded, has relatively good mechanical stretching characteristics and is easily worked by means of tools.
- Referring to Figures 3a to 3c, a section of the type shown in Figure 1 is predisposed for bending along a transverse line of the base side by means of mechanical processing to produce a local weakening. More particularly, a cut is made in accordance with a first pre-determined angle (45° in the example) with respect to the plane of the
base side 10 and a second cut in accordance with a second pre-determined angle (135° in the example) with respect to said plane, thereby removing material from the body of the section. The vertex of the V-notch produced in this way forms an incision on the internal face of the base side. The dash-dotted lines in Figure 3c define the vertex of the V-notch and the broken line indicates the plane that delimits the internal face of the base plane. After having been cut, the incision is enlarged by means of milling machine in such a way as to obtain a groove of a substantially square section. The groove has abottom face 20 and twoside walls 30, 30' at right angles to the base side that form, respectively, asharp angle 32 and a smoothed orrounded angle 33 with the bottom face. - The angles of the V-notches are chosen according to the bending angle, i.e. the angle the section is required to assume after the bending. In the illustrated example, obviously, a right angle is obtained after the bending. The depth of the incision and the groove and the width of the groove are chosen on the basis of the bending angle and the mechanical characteristics of the material (elongation, elasticity). In one practical case the base side has a thickness of 2.5 mm and the groove has a depth of 1.0 mm and a width of 4.5 mm.
- The shape of the groove is of decisive importance for obtaining an accurate bend with a uniform distribution of the deformations of the base side in the region of the bend, i.e. in the region delimited by the bottom of the groove. In particular, the deformation of the material begins along a well defined line, namely that of the
sharp corner 32, and then extends gradually and uniformly right up to therounded corner 33. Thanks to the uniform distribution of the deformations, the material remains integral and compact in the bending region and that makes it possible to bend even painted sections without the layer of paint becoming detached or cracked due to the effect of the bending stresses. Furthermore, the bending can be performed with the greatest precision without having to use special equipment to control the bending angle. - A preferred application of the section predisposed for bending in accordance with the invention envisages four notches to obtain bending angles of 90° separated from each other in such a way as to form a rectangular frame after the bending.
- In the case in which it is desired to obtain a frame that has its junction point exactly at the centre of a side, one has to take due account of the effect of the asymmetric shape of the grooves on the dimensions of the sides of the frame. In fact, the length of each side of the frame after the bending is affected by the shape of the grooves that delimit it; more particularly, considering a generic side of the frame, its length after the bending depends on the orientation of each of the grooves that delimit it: when one or the other of these grooves is oriented with its sharp angle closer to a predetermined reference point within the side than the rounded angle, i.e. has its sharp angle "within the side", the side in question will be shorter than it would be if the sharp angle were "outside the side", i.e. further removed from the reference point than the rounded angle. Therefore, whenever the junction point has to be situated exactly at the centre of a side, the side in question has to be delimited by grooves that either have both their sharp angles within the side or both the sharp angles outside thereof. Naturally, if a perfectly rectangular frame is to be obtained, it is essential that the distance between the grooves of the side opposite to the one with the joint should be reduced or increased in a corresponding manner. In the example of Figure 4 the grooves of two adjacent notches, indicated by B and C, have the sharp angle on the same side (on the right when one looks at the drawing), while the other two grooves, indicated by D and E, have it on the other side (i.e. on the left). As can readily be noted, after the bending the side BC and the side DE will be affected in the same manner by the shape of the grooves that delimit them, so that the distance between the grooves B and C and the distance between the grooves D and E must be equal if one wants the two opposite sides BC and DE to be equal after the bending; the side EB=EF+AB is delimited by grooves that have both their sharp angles outside the side and the side CD is delimited by grooves that have both their sharp angles within the side; therefore, if the sides EB and CD are to be equal after the bending, the distance between the grooves C and D must be greater than the sum EF+AB. The amount of the difference will be determined in each case on the basis of the dimensions of the section and the grooves.
- A particularly advantageous manner of closing the frame is illustrated by Figure 5 and Figures 6a to 6c. Prior to the bending of the section, which is here assumed to be of the type shown in Figure 1 and to have a structure that comprises a channel 15 (Figures 1 and 6b) parallel to the
base side 10, a milling operation is performed in proximity of one of the ends of the section in order to remove a part of the structure that delimits thechannel 15 and to form aspace 50 into which there can be inserted the entire length of a self-threading screw 51 and a tool for turning this screw. The passage constituted by the channel segment that extends from thespace 50 to the nearby end of the section is then enlarged in such a way as to make it possible for the screw to be inserted into it. The position of thespace 50 and the length of the screw are chosen in such a manner that the screw may project beyond the end of the section, as shown in Figure 6c. After having brought the two ends of the section into contact with each other, thescrew 51 is screwed, if necessary by means of an articulated screw driver (schematically shown in Figures 5 and 6a), into thechannel 15 that opens onto the end of the section opposite to the one with the screw, until the joint is completely tight. - If necessary in order to confer greater rigidity upon the frame, the bending may be preceded by making a hole at right angles to the plane of the base side in proximity of each of the bending regions and, more precisely, at a distance from the bending region such that, following the bending, it will be aligned with the
channel 15 of the body. As shown by Figures 7a to 7c, a self-threading screw 17 is then screwed into thechannel 15 until it becomes tight with its head flush against an internal wing of the body (Figure 7a). If the section used is the one shown in Figure 2, it will be best to use two screws both for closing the frame and also for any stiffening thereof, naturally after having formed two spaces for inserting the screws that are to be screwed into the respective longitudinal channels. - As is clearly brought out by the above, the section predisposed for bending in accordance with the invention makes it possible to fabricate frames and framed structures without the use of special equipment for the bending, because this operation is performed manually, and without the use of specific fixing means, because this operation is carried out by using only one or more self-threading screws for closing and possibly also stiffening (the frame). Furthermore, thanks to the conformation of the bending notches, the bending radius is always uniform, so that the section may be painted before it is bent; rather, in the greater part of cases it may be painted even before the various machining operations.
- Although only a single embodiment of the invention has been described and illustrated hereinabove, it is clear that numerous variants and modifications are possible without overstepping the invention as defined by the claims. For example, the section may be predisposed for bending it through angles other than a right angle and, as regards the closing and the stiffening of the frames, traditional means can be used in place of those here illustrated.
Claims (6)
- A section predisposed for being bent along at least one transverse bending line of its plane base side (10), characterized in that at every bending line it is provided with a V-notch that extends across the entire width of the section and terminates with its vertex in the base side (10), forming therein a substantially square groove characterised in that said groove has one sharp angle (32) and one rounded angle (33).
- A section in accordance with Claim 1 having four V-notches that form angles of 45° with the base side (10) and define four bending lines, wherein the groove of two adjacent notches have their sharp angles (32) on one side and the grooves of the other two adjacent notches have their sharp angle (32) on the other side.
- A section in accordance with Claim 1 or Claim 2 having a structure that comprises at least one longitudinal channel (15) parallel to the base side and at least one space formed by removing a part of the longitudinal channel (15) in order to render accessible a segment of the longitudinal channel (15) in proximity of one of the two ends of the section.
- A frame formed from a single piece of section in accordance with Claim 3 bent along four bending lines, wherein the two ends of the section are butt-jointed by means of at least one screw (51) that passes through the channel segment and is screwed into the channel that opens onto the other end of the section.
- A section in accordance with Claim 1 or Claim 2 having four notches that form angles of 45° with the base side (10) and define four bending lines, a structure that comprises at least one longitudinal channel (15) parallel to the base side and at least one hole that extends at right angles to the base side in a position adjacent to at least one of the bending lines, in such a way as to become aligned with the longitudinal channel (15) when the section is bent along the respective bending line.
- A frame formed from a single piece of section in accordance with Claim 5 bent along the four bending lines and comprising at least one screw that passes through the hole and is screwed into the channel aligned with the hole.
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE60313314T DE60313314D1 (en) | 2003-07-29 | 2003-07-29 | Bending prepared profile and frame made from a single such profile section |
AT03425507T ATE360130T1 (en) | 2003-07-29 | 2003-07-29 | PREPARED FOR BENDING PROFILE AND FRAME MADE FROM A SINGLE SUCH PROFILE SECTION |
EP03425507A EP1503027B1 (en) | 2003-07-29 | 2003-07-29 | Section predisposed for bending and frame made from a single piece of such a section |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP03425507A EP1503027B1 (en) | 2003-07-29 | 2003-07-29 | Section predisposed for bending and frame made from a single piece of such a section |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1503027A1 EP1503027A1 (en) | 2005-02-02 |
EP1503027B1 true EP1503027B1 (en) | 2007-04-18 |
Family
ID=33522511
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP03425507A Expired - Lifetime EP1503027B1 (en) | 2003-07-29 | 2003-07-29 | Section predisposed for bending and frame made from a single piece of such a section |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP1503027B1 (en) |
AT (1) | ATE360130T1 (en) |
DE (1) | DE60313314D1 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
ES2358700B1 (en) * | 2009-07-28 | 2012-02-08 | Jesús Francisco Barberán Latorre | SYSTEM FOR THE MANUFACTURE OF FRAMES OR COATED PARTS WITHOUT VISIBLE JOINTS. |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR833438A (en) * | 1937-02-20 | 1938-10-21 | Manufacturing process for metal frames and the like | |
FR2310814A1 (en) * | 1975-05-12 | 1976-12-10 | Leroux Sa Ets | PROCESS FOR BENDING THICK PROFILES, OBTAINED PROFILE AND ITS APPLICATION TO GLASS FRAMES AND THE LIKE |
DE2614023A1 (en) * | 1976-04-01 | 1977-10-06 | Festo Maschf Stoll G | Tubular metal frame with easily formed curved corners - has incisions at curvature point forming smooth exterior when bent |
GB2237051A (en) * | 1989-10-21 | 1991-04-24 | Gary Daynes | Square cornered spacer tube & method of making it |
-
2003
- 2003-07-29 EP EP03425507A patent/EP1503027B1/en not_active Expired - Lifetime
- 2003-07-29 DE DE60313314T patent/DE60313314D1/en not_active Expired - Lifetime
- 2003-07-29 AT AT03425507T patent/ATE360130T1/en not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
ATE360130T1 (en) | 2007-05-15 |
DE60313314D1 (en) | 2007-05-31 |
EP1503027A1 (en) | 2005-02-02 |
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