EP3839195B1 - Ladder - Google Patents

Ladder Download PDF

Info

Publication number
EP3839195B1
EP3839195B1 EP20215200.5A EP20215200A EP3839195B1 EP 3839195 B1 EP3839195 B1 EP 3839195B1 EP 20215200 A EP20215200 A EP 20215200A EP 3839195 B1 EP3839195 B1 EP 3839195B1
Authority
EP
European Patent Office
Prior art keywords
wall
ladder
steps
upright
uprights
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.)
Active
Application number
EP20215200.5A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP3839195A1 (en
Inventor
Francesco CASARIN
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.)
Abagrigliati SRL
Original Assignee
Abagrigliati SRL
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 Abagrigliati SRL filed Critical Abagrigliati SRL
Priority to SI202030130T priority Critical patent/SI3839195T1/sl
Publication of EP3839195A1 publication Critical patent/EP3839195A1/en
Application granted granted Critical
Publication of EP3839195B1 publication Critical patent/EP3839195B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • EFIXED CONSTRUCTIONS
    • E06DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06CLADDERS
    • E06C7/00Component parts, supporting parts, or accessories
    • E06C7/08Special construction of longitudinal members, or rungs or other treads
    • E06C7/082Connections between rungs or treads and longitudinal members
    • E06C7/085Connections between rungs or treads and longitudinal members achieved by deforming the rung or the stile

Definitions

  • the present invention relates to a ladder.
  • the present invention relates to a ladder of the type comprising two uprights on which a plurality of steps are applied crosswise and adapted to enable overcoming differences in height with a minimum horizontal bulk.
  • the present invention also relates to an assembly kit for the ladder wherein the steps and the two uprights are disassembled.
  • ladders are provided by producers already assembled, and the plurality of steps are fastened to the two uprights by means of suitable irreversible fixing operations such as welding.
  • the applicant has thus developed an assembly procedure of the components of the ladder of simple production, easy to carry out also by the end user.
  • the procedure requires only the use of common tools/instruments such as hammers and/or screwdrivers, without having to resort to dedicated tools, thus enabling the shipping of the ladder dismantled, reducing the transportation costs thereof.
  • reference numeral 1 indicates, as a whole, a ladder.
  • the ladder 1 comprises two vertical uprights 2 parallel to one another and a plurality of horizontal steps 3 supported by the uprights 2.
  • the various steps 3 are arranged crosswise between the two uprights 2 and are preferably arranged at a constant step between one another.
  • each upright 2 has a vertical longitudinal axis A and each step 3 has a horizontal longitudinal axis B.
  • each upright 2 is composed of a section bar, i.e. a bar having a constant cross-section, preferably made of metal but optionally also of plastic material.
  • each upright 2 is formed by: a vertical outer wall P1, two vertical side walls P2 which branch off from opposite ends of the outer wall P1, and two vertical inner walls P3 which are parallel to the outer wall P1 and which branch off from the two distal ends of the side walls P2, and are arranged at a certain distance from one another.
  • one single inner wall P3 is present which extends between the two distal ends of the side walls P2; i.e., in this embodiment, the two inner walls P3 are joined to one another in a seamless manner forming one single inner wall P3.
  • each upright 2 is provided with two vertical wings P4, which branch off from the two distal ends of the inner walls P3 and are parallel to the side walls P2.
  • each step 3 is made by means of a constant C-shaped cross-section bar, preferably made of metal but optionally also of plastic material; each step 3 has a horizontal upper wall P5 and two vertical side walls P6 (thus parallel to the side walls P2 of the uprights 2) which branch off from opposite ends of the upper wall P5.
  • each upright 2 is provided with a plurality of outer holes 4, made on the outer wall P1, which enable the insertion of the steps 3 therein.
  • the outer holes 4 have a shape that reproduces in negative and by excess the cross-section (i.e. orthogonal to the longitudinal axis B) of each step 3.
  • each outer hole 4 is further provided with a tongue 7, which branches off from the lower side L1 of each outer hole 4 and is adapted to prevent the accidental slipping out of the step 3, once bent, after having completed the interlocking between each step 3 and the two uprights 2.
  • Each tongue 7 is initially parallel to the outer wall P1 of each upright 2; each tongue 7 is then bent by 90° with respect to the corresponding outer wall P1, so as to be in abutment against the upper wall P5 of the relative step 3, once completely assembled.
  • each tongue 7 is preferably provided with a hole 8, adapted to facilitate the bending operation of the tongue 7, favouring the deformation of each tongue 7 in the ideal point.
  • the inner walls P3 and the wings P4 of each upright 2 are provided with inner holes 5 (open on one side, i.e. through holes, slots) which enable the insertion of the step 3 therein.
  • each inner hole 5, made on the inner walls P3 and on the wings P4, is arranged at a height such that, once completely assembled, the upper wall P5 of the corresponding step 3 is at the same height of the lower side L1 of the outer hole 4 of each upright 2, as illustrated in Figure 2 .
  • each inner hole 5 is made in such a manner that the distance between the two vertical profiles L2 and L3 obtained on the inner walls P3 of each upright 2 is equal to the width of each step 3, so as to prevent the translation of the step 3 in a longitudinal direction, orthogonal to the plane defined by the longitudinal axis A of each upright 2 and to the longitudinal axis B of each step 3, once completed the interlocking between the components.
  • each upright 2 could have a closed section (i.e. could have one single inner wall P3 which extends between the two distal ends of the side walls P2) and thus the inner holes 5 could be closed.
  • both side walls P6 of each step 3 are provided with two vertical slits 6 at their ends, adapted to enable the insertion and the interlocking of each step 3 with the inner walls P3 of each upright 2.
  • the slits 6 made on the side walls P6 of each step 3 have a toothed profile, as illustrated in Figure 5 ; furthermore, the slits 6 made on the side walls P6 of each step 3 are press-fitted into the inner walls P3 of each upright 2.
  • each slit 6 is made at a distance, measured parallel to the longitudinal axis B, from the corresponding end of each step 3, such that the end of each step 3 is in abutment against the inner surface of the outer wall P1 of each upright 2, once completely assembled.
  • each section bar 6 is made at a distance, measured parallel to the longitudinal axis B, from the corresponding end of each step 3, such that the end of each step 3 presses against the corresponding inner wall P3, further away from the outer wall P1, thus causing a deformation of the inner wall P3.
  • the present invention further relates to an assembly kit for the ladder 1, wherein the steps 3 and the two uprights 2 are disassembled.
  • the present invention further relates to an assembly method of the assembly kit for the ladder 1.
  • the assembly method provides for arranging the two uprights 2 parallel to one another and spaced by a distance D equal to the length (longitudinal dimension) of each step 3, then for inserting each step 3 through a corresponding outer hole 4 of an upright 2 until reaching and engaging a corresponding outer hole 4 of the other upright 2, and lastly for interlocking each step 3 with the inner walls P3 of the two uprights 2 at the slits 6.
  • the tongues 7 are bent inwards (with a plastic deformation of the material) until they are brought into abutment against the respective steps 3.
  • the ladder 1 described above has numerous advantages.
  • the ladder 1 described above can be transported, stored and delivered disassembled thus occupying a minimum space (if compared to the space occupied by the assembled ladder 2).
  • the ladder 1 described above can be assembled by the end user in a simple (thus without requiring particular manual skills), intuitive (thus without requiring particular training), quick manner, and without requiring particular tools at disposal (if not a common hammer).
  • the ladder 1 described above is of simple and cost-effective production since the uprights 2 and the steps 3 are easy to manufacture by means of the square bending (i.e. by 90°) of corresponding sheared flat plates.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Ladders (AREA)
EP20215200.5A 2019-12-17 2020-12-17 Ladder Active EP3839195B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
SI202030130T SI3839195T1 (sl) 2019-12-17 2020-12-17 Lestev

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT102019000024307A IT201900024307A1 (it) 2019-12-17 2019-12-17 Scala a pioli

Publications (2)

Publication Number Publication Date
EP3839195A1 EP3839195A1 (en) 2021-06-23
EP3839195B1 true EP3839195B1 (en) 2022-09-28

Family

ID=70155098

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20215200.5A Active EP3839195B1 (en) 2019-12-17 2020-12-17 Ladder

Country Status (4)

Country Link
EP (1) EP3839195B1 (es)
ES (1) ES2932087T3 (es)
IT (1) IT201900024307A1 (es)
SI (1) SI3839195T1 (es)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2226213C3 (es) * 1972-05-30 1975-11-13 Walter 7120 Bissingen Kuemmerlin

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR819114A (fr) * 1936-03-13 1937-10-11 Bru Der Wu Ster Procédé pour la fabrication de montants métalliques pour échelles balustrades, clôtures ou constructions analogues et pour la fixation des échelons
US4204587A (en) * 1978-10-13 1980-05-27 White Metal Rolling And Stamping Corp. Ladder constructions

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2226213C3 (es) * 1972-05-30 1975-11-13 Walter 7120 Bissingen Kuemmerlin

Also Published As

Publication number Publication date
EP3839195A1 (en) 2021-06-23
SI3839195T1 (sl) 2023-01-31
ES2932087T3 (es) 2023-01-11
IT201900024307A1 (it) 2021-06-17

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