EP0306381B1 - Article muni d'articulations élastiques se rigidifiant lors de leur mise en tension - Google Patents

Article muni d'articulations élastiques se rigidifiant lors de leur mise en tension Download PDF

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Publication number
EP0306381B1
EP0306381B1 EP88402083A EP88402083A EP0306381B1 EP 0306381 B1 EP0306381 B1 EP 0306381B1 EP 88402083 A EP88402083 A EP 88402083A EP 88402083 A EP88402083 A EP 88402083A EP 0306381 B1 EP0306381 B1 EP 0306381B1
Authority
EP
European Patent Office
Prior art keywords
elements
elastic
article according
endowed
elastic properties
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
Application number
EP88402083A
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German (de)
English (en)
French (fr)
Other versions
EP0306381A1 (fr
Inventor
Dominique Delamour
Olivier Rodi
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.)
CHENE, RICHARD
Delamour Dominique
Rodi Olivier
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
Priority claimed from FR8711592A external-priority patent/FR2619361B1/fr
Application filed by Individual filed Critical Individual
Priority to AT88402083T priority Critical patent/ATE84269T1/de
Publication of EP0306381A1 publication Critical patent/EP0306381A1/fr
Application granted granted Critical
Publication of EP0306381B1 publication Critical patent/EP0306381B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D11/00—Containers having bodies formed by interconnecting or uniting two or more rigid, or substantially rigid, components made wholly or mainly of plastics material
    • B65D11/18—Containers having bodies formed by interconnecting or uniting two or more rigid, or substantially rigid, components made wholly or mainly of plastics material collapsible, i.e. with walls hinged together or detachably connected
    • B65D11/1833—Containers having bodies formed by interconnecting or uniting two or more rigid, or substantially rigid, components made wholly or mainly of plastics material collapsible, i.e. with walls hinged together or detachably connected whereby all side walls are hingedly connected to the base panel
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D1/00—Containers having bodies formed in one piece, e.g. by casting metallic material, by moulding plastics, by blowing vitreous material, by throwing ceramic material, by moulding pulped fibrous material, by deep-drawing operations performed on sheet material
    • B65D1/22—Boxes or like containers with side walls of substantial depth for enclosing contents
    • B65D1/225—Collapsible boxes

Definitions

  • the present invention relates to parts or articles of the type set out in the preamble to claim 1.
  • housings for electronic equipment such as housings for microcomputers housings for HI-FI equipment, housings for cameras.
  • archive boxes made up of semi-flexible, semi-rigid plastic plates linked together.
  • the articulation of the opening part with the cardboard storage box is generally constituted by a simple thinning between two plates.
  • a fastening tab retains the opening part (generally a section of the housing) in the folded position on the housing when it is closed.
  • Such a device has several drawbacks.
  • the rigidity of the housing is not good, which leads to its deformation as soon as it is a little too loaded.
  • the joint is fragile and may eventually break.
  • boxes containing electronic equipment are designed quite differently. They are made from non-articulated removable plates, fixed to each other during assembly by screws or any other equivalent means.
  • document US-A-4 170 313 relates to a housing arrangement with foldable walls in which the articulated elements in rotation are arranged as indicated in the preamble of claim 1.
  • the elastically bent part of the joint n has the role that the mutual guidance of the elements during their mutual rotation and it has no functional role outside the rotation phase; in particular, it has no active function when the two elements are in their second position (folded position), so that it is necessary to have recourse to other separate members to make up for the play between the elements and / or the correct relative positioning of the elements and / or their blocking.
  • the invention aims to provide articles of the above defined type which meet the requirements of practice better than those previously known, in particular in that they allow an improved housing design in one piece of composite material, for example for electronic equipment, in that they allow easy storage and optimized transport of folding articles of great solidity, and in that they are easy to assemble and manufacture.
  • the articulation of the present invention allows an excellent take-up of the clearances between the different elements and therefore, to within manufacturing tolerances, a relative positioning of the elements relative to each other very precise with an excellent ability to repetition. In other words, after each operation of the joint, the elements return precisely and systematically to the same place, in the locked position.
  • the invention proposes in particular an article of the type defined above, characterized by the provisions set out in the characterizing part of claim 1.
  • the invention also provides a plastic case for electronic circuits comprising a base element and four lateral elements and means for fixing each lateral element to a respective side of the base element, characterized in that said fixing means comprise means of articulation of each lateral element with said base element between a flat position where all the elements are substantially in the same plane and a folded position in abutment of each lateral element against the base element to form the housing, in that they comprise means for blocking each lateral element with respect to the base element in these folded positions of respective stop to keep the housing in the closed position, and in that said articulation means consist of pieces of elastic material connecting each of the lateral elements respectively to one side of the base element, said articulation means being arranged to stretching said pieces between a rest position of said pieces when the lateral elements are flat t with the base element and a tensioned position of said parts when the lateral elements are locked relative to the base element in the closed position of the housing, so that the elastic stretched parts ensure good rigidity of the articulations between each of the four side elements and the base element
  • the lateral elements and the base are made of thermoplastic polymer of the molded ABS type and the parts of elastic material are of synthetic elastomer, of the synthetic rubber type based on butadiene and styrene overmolded in spaces previously provided in the plastic elements with which said elastic parts are welded during said overmolding.
  • FIG. 1 shows the articulation means 1 of an article comprising two elements, a "male” element 2 (comprising a projecting part 2a) and a “female” element 3 (comprising a recessed part 3a) in the folded position and in abutment against each other, the elements 2 and 3 forming an angle between them, for example 90 °.
  • Figure 3 shows the same elements 2 and 3 flat. These two elements are rigid and each extend substantially in the same plane.
  • the articulation means 1 additionally comprise a piece 4 of elastic material rigidly fixed at 5 and 6 to the two elements which it connects to one another.
  • the piece 4 of elastic material occupies a relaxed position ( Figure 3).
  • Figure 3 When the two elements are in the folded position, and when they are blocked with respect to each other by blocking means (not shown in FIGS. 1 and 3), the part 4 occupies a taut position so that 'It ensures good rigidity of the articulation means 1 of the two elements 2 and 3 between them.
  • the piece 4 of elastic material is flexible and of a certain extensibility.
  • the hardness of the elastic piece can for example be of the order of 90 shores and pass to 100 shores with an elongation of 3% when it is tensioned (for example with the order of 30 g pressure).
  • the three parameters of hardness, extension and value of the pressure exerted can be varied, as desired.
  • FIGS. 1 and 3 a welding type connection mode has been shown between the elements 2 and 3 and the part 4. They are then all made of plastic material, for example ABS polymer for elements 2 and 3 and in elastomer containing butadiene and styrene for the part 4. This is overmolded in the elements 2 and 3 having definitive solidification of the latter.
  • Figure 1 there are shown channels 7 in dotted lines before allowing the elastomer to flow.
  • Figure 2 shows a variant where the parts 2 and 3 are made of plastic or other material (aluminum, steel, etc.).
  • the elastomer part 4 can no longer be fixed by welding as in the case of FIG. 1 with the elements 2 and 3.
  • Parts 8 and 9 provided with notches 10 into which the ends 10a are inserted of part 4, said notches, being for example corrugated to favor attachment, are provided and fixed to elements 2 and 3 by means known per se (not shown).
  • the part 4 can also be fixed to the elements 2 and 3 by gluing or any other fixing means known to those skilled in the art.
  • Figure 2a shows a variant where the part 4a is constituted by a corrugated metal tongue.
  • the tongue can then be fixed on the parts 2a and 3a, if they are also metallic, by welding or any other known means.
  • the use of a part with elastic properties which is metallic makes it possible to subject the temperatures and difficult conditions to the joint without damaging it. This arrangement has significant advantages and in particular allows particularly interesting applications in the automotive industry.
  • Figure 4 shows a variant of the joint of the invention or two locking positions are possible.
  • the element 3 comprises a tongue 3b capable of cooperating with a first notch 2b or a second notch 2c of the male element 2.
  • FIG. 4 shows the application of the articulation to a window whose element 2 is part of the frame and element 3 of the opening. Spaces 2d and 3c are provided in the body of the elements to allow a certain elasticity and relieves elements relative to each other.
  • Figure 5 shows a variant of the invention where the rest position of the elastic piece is provided when the elements 2 and 3 form an angle between them, the tense position being obtained when the elements are flat in the same plane.
  • FIG. 6 shows a housing for electronic circuits according to the invention.
  • This housing comprises a base element 10 in the form of a plate on which electronic circuits are fixed permanently or detachably.
  • FIG. 6 shows, for information only, an electronic card 11, a chip housing 12, vertical supports 13, etc.
  • the housing also includes lateral elements 14 connected by means of articulation means according to the invention, shown diagrammatically at 15, to the base element 10, on each of the sides of said base element.
  • the elements 14 are capable of being folded around the articulation means 15 to come to bear and fix themselves by means of blocking means 16a, 16b in the folded position relative to the base element and thus constitute the housing. of substantially parallelepiped shape. All the locking means have not been shown so as not to overload the figure.
  • the elements 14 comprise input-output plugs 14a making it possible to communicate the interior of the housing with external connection cables. They also advantageously comprise either own electronic circuits 17, or an interface keyboard 18 comprising push buttons 19 or buttons operating by elastic contacts 20. It is also possible to incorporate a screen 21 or any other device known per se into these lateral elements. that are found in and on electronic boxes, whether boxes for microcomputers, HI-FI systems, etc.
  • the articulation means 15 comprise a part 16 of elastic material rigidly fixed to the lateral elements of on the one hand and on the base on the other. A particularly advantageous method of attachment is that described above, the elements being of ABS type thermoplastic material and the part of elastic material being overmolded on the base part constituted by all of the five elements which can be seen in FIG.
  • thermosetting plastic constituting the rigid elements
  • elastomeric material constituting the part 16 of the joint 15.
  • the latter can advantageously come, by paths 22 previously prepared in the initial mold, to enter reservations made in the various elements to constitute a part of the keyboard 18 actuatable by pressure of one of the side elements.
  • FIG. 7 shows different arrangements of control buttons, the parts 23, 24, 25 being of hard material and the parts shown at 26 being of softer material: elastomer.
  • the constitution of this type of keyboard being known per se, will not be detailed in more detail.
  • corner pieces 27 are shown which are integral with the base plate 10 and on which the lateral elements 14 are snapped or blocked.
  • the locking elements 16a, 16b are shown schematically and can for example be constituted by small balls coming to be blocked in holes whose entry diameter is slightly smaller.
  • Figure 9 gives in perspective and partially an idea of the external appearance of the housing when it is in the folded position.
  • Figure 11 shows in perspective and in partial view two elements that can constitute a table or a stool.
  • the articulation means are constituted by an elongated projection forming a ball joint 32 and a groove 33 suitable for cooperating with the projection, one belonging to the element 31 and the other to the element 30.
  • the part 34 in elastic material ensures the connection and fixing of two elements relative to each other. In the folded position, as shown in Figures 10 and 11, the tensioning of this part ensures good rigidity of the assembly.
  • Locking means 35 comprising for example means 36 for progressive tensioning of the part 34, for example by rotation of a thumb wheel 37, are shown in the figures.
  • Other tensioning and blocking means can be used and are within the reach of those skilled in the art.
  • the thickness e of this part at the level of the attachment to one of the elements is greater than the thickness e ′ than l 'can be measured in the middle part of the part at the ball joint 32 of the element 31.
  • Means 38, constituted for example by pins or any other means preventing the sliding of the part 34 relative to the elements 30 and 31 are provided in the two longitudinal notches 39 of the elements 30 and 31 in which the part 34 is inserted to link said elements to each other.
  • Figures 12 and 13 show a particularly advantageous embodiment of the invention where the part endowed with elastic properties and the two rigid elements connected to each other by said part are constituted by the same part.
  • the single part used as articulation according to an embodiment of the present invention is made of thermoplastic elastomer of the type known under the trademark HYTREL registered by Du Pont de Nemours for its technical thermoplastic elastomers.
  • This type of thermoplastic elastomer combines a large number of characteristics sought in rubber and flexible high-performance plastics. It is very tenacious and offers exceptional resilience, high resistance to creep, impact and fatigue as well as repeated bending. Excellent flexibility at low temperatures and good preservation of these properties at high temperatures are also among the important qualities of thermoplastic elastomers of this type. It also resists deterioration from many industrial chemicals, oils and solvents.
  • thermoplastics in particular injection molding, extrusion, blow molding, rotational molding and melt casting, make it possible to easily manufacture high performance parts with the shapes that we want.
  • the processing is carried out at temperatures between 170 ° C and 250 ° C, for example of the order of 200 ° C.
  • thermoplastics of the type of HYTREL it is thus possible to produce a joint of the type of that of the article according to the invention in a single piece, thus replacing multiple pieces of plastic, wood or metal connected by a piece of elastic material such as rubber.
  • FIGS. 12 and 13 The article partially represented in FIGS. 12 and 13 is essentially formed from two elements or portions: a "male" portion 2 ′ (comprising a projecting part 2′a) and a "female” portion 3 ′ (comprising a portion hollow 3′a).
  • Figure 12 shows in the folded position and in abutment against each other, the elements or portions 2 ′ and 3 ′ forming an angle between them, for example 90 °.
  • Figure 13 shows the same portions 2 ′ and 3 ′ flat. These two elements are rigid and each extend substantially in the same plane.
  • the articulation means 1 ′ further comprise an elastic portion 4 ′ secured to the portions 2 ′ and 3 ′ which it connects to one another.
  • the portions 2 ′, 3 ′ and 4 ′ constitute one and the same piece, unique, but having, for the portions 2 ′ and 3 ′, a high rigidity and hardness while the portion 4 ′ is elastic and extensible.
  • the elastic portion 4 ′ occupies a relaxed position (FIG. 13).
  • the portions 4 ′ occupies a stretched position so that it ensures good rigidity of the articulation means 1 of the two portions 2 ′ and 3 ′ between them.
  • the elastic 4 ′ portion is flexible and of a certain extensibility.
  • the hardness of the elastic portion can for example be of the order of 80 shores and pass to 100 shores with an elongation of 3% when it is tensioned (for example with around 30 g. pressure). But, as we have seen and depending on the application, we can vary the three parameters hardness, extension and value of the pressure exerted as desired by varying the composition and thickness of the thermoplastic elastomer , of type HYTREL, used.
  • Figures 14 and 15 show another advantageous embodiment in which the part with elastic properties, for example a rubber part 4 ⁇ is arranged to occupy a position beyond the axis of rotation Ox of the joint, in the folded position (fig. 15).
  • the elastic part passes through a maximum tension, which decreases once the plane of said part 4 ⁇ has exceeded the axis Ox, which helps bring it into the locking position of the two elements 3 ⁇ and 2 ⁇ with each other.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Ceramic Engineering (AREA)
  • Casings For Electric Apparatus (AREA)
  • Pivots And Pivotal Connections (AREA)
  • Toys (AREA)
  • Orthopedics, Nursing, And Contraception (AREA)
EP88402083A 1987-08-14 1988-08-10 Article muni d'articulations élastiques se rigidifiant lors de leur mise en tension Expired - Lifetime EP0306381B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT88402083T ATE84269T1 (de) 1987-08-14 1988-08-10 Element mit elastischen, sich bei spannung versteifenden gelenken.

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
FR8711592A FR2619361B1 (fr) 1987-08-14 1987-08-14 Article muni d'articulations elastiques se rigidifiant lors de leur mise en tension
FR8711592 1987-11-13
FR878715706A FR2623167B2 (fr) 1987-08-14 1987-11-13 Perfectionnement aux articles munis d'articulations elastiques se rigidifiant lors de leur mise en tension
FR8715706 1987-11-13

Publications (2)

Publication Number Publication Date
EP0306381A1 EP0306381A1 (fr) 1989-03-08
EP0306381B1 true EP0306381B1 (fr) 1993-01-07

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ID=26226173

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88402083A Expired - Lifetime EP0306381B1 (fr) 1987-08-14 1988-08-10 Article muni d'articulations élastiques se rigidifiant lors de leur mise en tension

Country Status (7)

Country Link
US (1) US4896787A (el)
EP (1) EP0306381B1 (el)
JP (1) JPH06100219B2 (el)
DE (1) DE3877292T2 (el)
ES (1) ES2037259T3 (el)
FR (1) FR2623167B2 (el)
GR (1) GR3007509T3 (el)

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Also Published As

Publication number Publication date
DE3877292T2 (de) 1993-07-01
DE3877292D1 (de) 1993-02-18
US4896787A (en) 1990-01-30
EP0306381A1 (fr) 1989-03-08
FR2623167B2 (fr) 1992-08-07
GR3007509T3 (el) 1993-08-31
JPH01288609A (ja) 1989-11-20
FR2623167A2 (fr) 1989-05-19
JPH06100219B2 (ja) 1994-12-12
ES2037259T3 (es) 1993-06-16

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