EP2000612B1 - Scaffold with lockable legs - Google Patents

Scaffold with lockable legs Download PDF

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Publication number
EP2000612B1
EP2000612B1 EP08075232.2A EP08075232A EP2000612B1 EP 2000612 B1 EP2000612 B1 EP 2000612B1 EP 08075232 A EP08075232 A EP 08075232A EP 2000612 B1 EP2000612 B1 EP 2000612B1
Authority
EP
European Patent Office
Prior art keywords
plank
leg unit
hinge part
hinge
scaffold
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
EP08075232.2A
Other languages
German (de)
French (fr)
Other versions
EP2000612A2 (en
EP2000612A3 (en
Inventor
Caspar Bernard Lampe
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.)
LAMPE HOLDING BV
Original Assignee
LAMPE HOLDING BV
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 LAMPE HOLDING BV filed Critical LAMPE HOLDING BV
Publication of EP2000612A2 publication Critical patent/EP2000612A2/en
Publication of EP2000612A3 publication Critical patent/EP2000612A3/en
Application granted granted Critical
Publication of EP2000612B1 publication Critical patent/EP2000612B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G1/00—Scaffolds primarily resting on the ground
    • E04G1/28—Scaffolds primarily resting on the ground designed to provide support only at a low height
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G1/00—Scaffolds primarily resting on the ground
    • E04G1/34—Scaffold constructions able to be folded in prismatic or flat parts or able to be turned down

Definitions

  • the present invention relates to a scaffold including a plank to support a person thereon.
  • the plank has opposite plank ends, the scaffold further including leg units, each leg unit being coupled to an associated plank end by a hinge structure at each lateral side of the plank end, so that each leg unit is pivotal between an extended position and a collapsed position.
  • Each hinge structure includes a first hinge part connected to the plank end and a second hinge part connected to the leg unit, as well as a pivot axis between said hinge parts.
  • Each hinge structure further includes a latch mechanism to retain the leg unit in at least its extended position.
  • Each second hinge part includes an upper portion which extends on the outside of the first hinge part when the leg unit is in its extended position.
  • Such a scaffold is known from US2006/169539 .
  • US 6,892,860 discloses a scaffold wherein the latch mechanism is arranged at the axial end of the plank. This latch mechanism engages on a top cross member of the leg unit.
  • the present invention aims to provide an alternative hinge structure with latch mechanism.
  • the present invention provides a scaffold according to claim 1.
  • Figures 1 and 2 show a portion of a scaffold including a plank 1 to support a person thereon and two leg units 2.
  • the plank is elongated and has opposite plank ends la (only one end visible).
  • Each leg unit 2 is coupled to an associated plank end la by a hinge structure at each lateral side of the plank end 1a (only one hinge structure visible), so that each leg unit 2 is pivotal between an extended position ( figure 2 ) and a collapsed position (lying along the lower side of the plank).
  • Each hinge structure includes a first hinge part 5 connected to the plank end 1a and a second hinge part 10 connected to the leg unit 2.
  • a pivot axis 8 is present between said hinge parts 5, 10, here at a position below the plank bottom side and inward of the axial end of the plank as is known in the art.
  • Each hinge structure further includes an automatic engaging latch mechanism to retain the leg unit in its extended position.
  • each second hinge part 10 includes an upper portion 11 which extends on the outside of the first hinge part 5 when the leg unit is in its extended position.
  • the upper portion 11 has a latch pin receiving opening 12 therein (obscured from view by member 15).
  • Each latch mechanism includes a spring-biased latch pin 13, received with the plank end and extending laterally outwards from the first hinge part 5, so as to engage automatically in the latch pin receiving opening 12 upon folding the leg unit to its extended position (see figures 1 and 2 ).
  • the second hinge part 10 further includes a user operable push member 15 which engages or can be made to engage on the front end of the latch pin 13 when received in the latch pin receiving opening 12, so as to allow the user to operate the push member 15 thereby pressing the pin 13 inwards out of said opening 12 allowing the user to fold the leg unit 2 back to the collapsed position.
  • a user operable push member 15 which engages or can be made to engage on the front end of the latch pin 13 when received in the latch pin receiving opening 12, so as to allow the user to operate the push member 15 thereby pressing the pin 13 inwards out of said opening 12 allowing the user to fold the leg unit 2 back to the collapsed position.
  • the push member 15 is a flexible lever, e.g. of suitable plastic material, attached to the second hinge part 10 at a position remote from the pin receiving opening and extending with a portion of the lever over the outside of the latch pin receiving opening 12. By pressing on said portion, the user can press the pin 13 inwards and out of the opening 12.
  • the upper portion 11 of the second hinge member 12 comprises an inclined pin guidance section 14 having at the upper end of the upper portion a major distance with respect to the first hinge portion 5, said distance decreasing towards the latch pin receiving opening so as to force the latch pin 13 inwards upon folding the leg unit 2 to its extended position, until the pin is aligned with said opening 12 and is spring-biased into said opening 12.
  • first and second hinge parts 5, 10 are metal plate members. These first and second hinge parts are riveted to said plank and said leg unit, respectively.
  • the plank 1 here includes multiple spaced apart longitudinal plank members, e.g. aluminium profiles.
  • Each leg unit here includes two laterally spaced apart uprights, e.g. aluminium profiles, and one or more cross-member interconnecting the uprights.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Mechanical Engineering (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Ladders (AREA)
  • Mutual Connection Of Rods And Tubes (AREA)

Description

  • The present invention relates to a scaffold including a plank to support a person thereon. The plank has opposite plank ends, the scaffold further including leg units, each leg unit being coupled to an associated plank end by a hinge structure at each lateral side of the plank end, so that each leg unit is pivotal between an extended position and a collapsed position. Each hinge structure includes a first hinge part connected to the plank end and a second hinge part connected to the leg unit, as well as a pivot axis between said hinge parts. Each hinge structure further includes a latch mechanism to retain the leg unit in at least its extended position. Each second hinge part includes an upper portion which extends on the outside of the first hinge part when the leg unit is in its extended position.
  • Such a scaffold, according to the preamble of claim 1, is known from US2006/169539 .
  • US 6,892,860 discloses a scaffold wherein the latch mechanism is arranged at the axial end of the plank. This latch mechanism engages on a top cross member of the leg unit.
  • The present invention aims to provide an alternative hinge structure with latch mechanism.
  • The present invention provides a scaffold according to claim 1.
  • Further preferred embodiments of the scaffold are mentioned in the subclaims.
  • The invention will now be explained in more details referring to the appended drawings. In the drawings:
    • Fig. 1 shows a portion of a preferred embodiment of the inventive scaffold, the leg unit being about midway between extended and collapsed position,
    • Fig. 2 shows the portion of figure 1 with the leg unit in extended and automatically latched position.
  • Figures 1 and 2 show a portion of a scaffold including a plank 1 to support a person thereon and two leg units 2. The plank is elongated and has opposite plank ends la (only one end visible).
  • Each leg unit 2 is coupled to an associated plank end la by a hinge structure at each lateral side of the plank end 1a (only one hinge structure visible), so that each leg unit 2 is pivotal between an extended position (figure 2) and a collapsed position (lying along the lower side of the plank).
  • Each hinge structure includes a first hinge part 5 connected to the plank end 1a and a second hinge part 10 connected to the leg unit 2.
  • A pivot axis 8 is present between said hinge parts 5, 10, here at a position below the plank bottom side and inward of the axial end of the plank as is known in the art.
  • Each hinge structure further includes an automatic engaging latch mechanism to retain the leg unit in its extended position.
  • As can be seen in the drawings each second hinge part 10 includes an upper portion 11 which extends on the outside of the first hinge part 5 when the leg unit is in its extended position.
  • The upper portion 11 has a latch pin receiving opening 12 therein (obscured from view by member 15).
  • Each latch mechanism includes a spring-biased latch pin 13, received with the plank end and extending laterally outwards from the first hinge part 5, so as to engage automatically in the latch pin receiving opening 12 upon folding the leg unit to its extended position (see figures 1 and 2).
  • The second hinge part 10 further includes a user operable push member 15 which engages or can be made to engage on the front end of the latch pin 13 when received in the latch pin receiving opening 12, so as to allow the user to operate the push member 15 thereby pressing the pin 13 inwards out of said opening 12 allowing the user to fold the leg unit 2 back to the collapsed position.
  • Here, as is preferred the push member 15 is a flexible lever, e.g. of suitable plastic material, attached to the second hinge part 10 at a position remote from the pin receiving opening and extending with a portion of the lever over the outside of the latch pin receiving opening 12. By pressing on said portion, the user can press the pin 13 inwards and out of the opening 12.
  • As can be seen the upper portion 11 of the second hinge member 12 comprises an inclined pin guidance section 14 having at the upper end of the upper portion a major distance with respect to the first hinge portion 5, said distance decreasing towards the latch pin receiving opening so as to force the latch pin 13 inwards upon folding the leg unit 2 to its extended position, until the pin is aligned with said opening 12 and is spring-biased into said opening 12.
  • Here, as is preferred, the first and second hinge parts 5, 10 are metal plate members. These first and second hinge parts are riveted to said plank and said leg unit, respectively.
  • The plank 1 here includes multiple spaced apart longitudinal plank members, e.g. aluminium profiles.
  • Each leg unit here includes two laterally spaced apart uprights, e.g. aluminium profiles, and one or more cross-member interconnecting the uprights.

Claims (7)

  1. Scaffold including a plank (1) to support a person thereon, the plank having opposite plank ends, the scaffold further including leg units (2), each leg unit being coupled to an associated plank end (1a) by a hinge structure at each lateral side of the plank end, so that each leg unit is pivotal between an extended position and a collapsed position,
    each hinge structure including a first hinge part (5) connected to the plank end (1a) and a second hinge part (10) connected to the leg unit (2), as well as a pivot axis (8) between said hinge parts, each hinge structure further including a latch mechanism to retain the leg unit in at least its extended position,
    wherein each second hinge part includes an upper portion (11) which extends on the outside of the first hinge part (5) when the leg unit is in its extended position,
    characterized in that
    the upper portion has a latch pin receiving opening (12) therein, and in that
    each latch mechanism includes a spring-biased latch pin (13), extending laterally outwards from the first hinge part, so as to engage automatically in the latch pin receiving opening (12) upon folding the leg unit to its extended position,
    and in that
    the second hinge part further includes a user operable push member (15) which engages on the front end of the latch pin (13) when received in the latch pin receiving opening (12), so as to allow the user to operate the push member (15) thereby pressing the pin inwards out of said opening (12) allowing the user to fold the leg unit back (2) to the collapsed position.
  2. Scaffold according to claim 1, wherein the push member (15) is a flexible lever attached to the second hinge part (10) remote from the pin receiving opening (12).
  3. Scaffold according claim 1 or 2, wherein the upper portion (11) of the second hinge part (10) comprises an inclined pin guidance section (14) having at the upper end of the upper portion a major distance with respect to the first hinge part (5), said distance decreasing towards the latch pin receiving opening (12) so as to force the pin (13) inwards upon folding the leg unit (2) to its extended position, until the pin (13) is aligned with said opening (12) and is spring-biased into said opening.
  4. Scaffold according to one or more of the preceding claims, wherein said first and second hinge parts (5,10) are metal plate members.
  5. Scaffold according to one or more of the preceding claims, wherein said first and second hinge parts (5,10) are riveted to said plank (1) and said leg unit (2).
  6. Scaffold according to one or more of the preceding claims, wherein said plank (1) includes multiple spaced apart longitudinal plank members, e.g. aluminium profiles.
  7. Scaffold according to one or more of the preceding claims, wherein each leg unit (2) includes two laterally spaced apart uprights and one or more cross-member interconnecting the uprights.
EP08075232.2A 2007-06-05 2008-03-31 Scaffold with lockable legs Active EP2000612B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL1033934 2007-06-05

Publications (3)

Publication Number Publication Date
EP2000612A2 EP2000612A2 (en) 2008-12-10
EP2000612A3 EP2000612A3 (en) 2013-03-13
EP2000612B1 true EP2000612B1 (en) 2014-11-19

Family

ID=39758462

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08075232.2A Active EP2000612B1 (en) 2007-06-05 2008-03-31 Scaffold with lockable legs

Country Status (1)

Country Link
EP (1) EP2000612B1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10435894B2 (en) 2016-03-22 2019-10-08 Werner Co. Scaffold with latch assembly and method
CN208534971U (en) * 2018-06-21 2019-02-22 江苏宙际杰智能科技股份有限公司 Fold locking mechanisms for step stool

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2879119A (en) * 1957-02-27 1959-03-24 Edwin I Bullock Folding table with spring lock
US6892860B2 (en) 2003-05-28 2005-05-17 Cosco Management, Inc. Scaffold with leg lock
US8042653B2 (en) 2005-02-02 2011-10-25 Werner Co. Adjustable work platform

Also Published As

Publication number Publication date
EP2000612A2 (en) 2008-12-10
EP2000612A3 (en) 2013-03-13

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