EP0931904A3 - Ladder - Google Patents
Ladder Download PDFInfo
- Publication number
- EP0931904A3 EP0931904A3 EP98301074A EP98301074A EP0931904A3 EP 0931904 A3 EP0931904 A3 EP 0931904A3 EP 98301074 A EP98301074 A EP 98301074A EP 98301074 A EP98301074 A EP 98301074A EP 0931904 A3 EP0931904 A3 EP 0931904A3
- Authority
- EP
- European Patent Office
- Prior art keywords
- beams
- steps
- ladder
- side surfaces
- punch
- 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.)
- Withdrawn
Links
Classifications
-
- E—FIXED CONSTRUCTIONS
- E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
- E06C—LADDERS
- E06C7/00—Component parts, supporting parts, or accessories
- E06C7/50—Joints or other connecting parts
-
- E—FIXED CONSTRUCTIONS
- E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
- E06C—LADDERS
- E06C7/00—Component parts, supporting parts, or accessories
- E06C7/08—Special construction of longitudinal members, or rungs or other treads
- E06C7/082—Connections between rungs or treads and longitudinal members
- E06C7/085—Connections between rungs or treads and longitudinal members achieved by deforming the rung or the stile
-
- E—FIXED CONSTRUCTIONS
- E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
- E06C—LADDERS
- E06C1/00—Ladders in general
- E06C1/02—Ladders in general with rigid longitudinal member or members
- E06C1/14—Ladders capable of standing by themselves
- E06C1/16—Ladders capable of standing by themselves with hinged struts which rest on the ground
- E06C1/18—Ladders capable of standing by themselves with hinged struts which rest on the ground with supporting struts formed as ladders
-
- E—FIXED CONSTRUCTIONS
- E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
- E06C—LADDERS
- E06C1/00—Ladders in general
- E06C1/02—Ladders in general with rigid longitudinal member or members
- E06C1/32—Ladders with a strut which is formed as a ladder and can be secured in line with the ladder
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Ladders (AREA)
Abstract
A ladder capable of preventing an accident from being
caused due to the weakened combining force between beams and hinges
while a user uses the ladder to perform work, and capable of
preventing the beams and the steps from being released from each
other. The ladder includes two pairs of beams (1,1' and 2,2')engaged with
each other by hinge means (H,H' ) , and a plurality of steps(S) disposed
between the beams (1,1',2,2') at the same distance interval. Both ends of
the steps(S) are inserted into holes (100) which are formed at one side
surfaces of the beams (1,1',2,2')and have the same cross sectional shape
with that of the steps(S) and a predetermined size adapted to receive the
ends of the steps (1,1',2,2'). Both ends of the steps(S) are enlarged due to
the striking force applied by a punch (102) and are engaged with the
beams (1,1',2,2')under the state that rounded ends of the steps(S) are
formed from the outer side surfaces of the beams (1,1',2,2')to inner side
surfaces of the beams (1,1',2,2') due to the striking force applied by the
punch (102) and the rounded ends are brought into contact with the
ends of the steps(S).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR9800836 | 1998-01-14 | ||
| KR1019980000836A KR100251377B1 (en) | 1998-01-14 | 1998-01-14 | A ladder |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0931904A2 EP0931904A2 (en) | 1999-07-28 |
| EP0931904A3 true EP0931904A3 (en) | 2000-05-17 |
Family
ID=19531442
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP98301074A Withdrawn EP0931904A3 (en) | 1998-01-14 | 1998-02-13 | Ladder |
Country Status (2)
| Country | Link |
|---|---|
| EP (1) | EP0931904A3 (en) |
| KR (1) | KR100251377B1 (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ZA200205046B (en) * | 2002-06-24 | 2003-10-29 | Lezmin 1636 Cc | Extensible ladder. |
| DE102004011851A1 (en) * | 2004-03-09 | 2005-10-06 | Hailo-Werk Rudolf Loh Gmbh & Co. Kg | Method for connecting a rung to a spar of a ladder |
| TWI400387B (en) * | 2009-12-29 | 2013-07-01 | Metal Ind Res & Dev Ct | Anti-slip gantry and its manufacturing method |
| CN105317368A (en) * | 2015-11-20 | 2016-02-10 | 温四妹 | Trestle ladder for single-person operation |
| CN106337646B (en) * | 2016-11-21 | 2018-09-11 | 北方民族大学 | A kind of ladder assembled unit and multifunctional ladder |
| KR102177301B1 (en) * | 2019-06-25 | 2020-11-11 | 황성규 | A type ladder with safe guider |
| CN111390037B (en) * | 2020-03-25 | 2021-07-06 | 翱文狄风电设备制造(上海)有限公司 | Thin aluminum alloy ladder stand and connection process between ladder frame and ladder step |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE466463A (en) * | ||||
| FR1122019A (en) * | 1955-02-01 | 1956-08-30 | Nusbaumer & Cie | Improvement in ladder construction |
| FR2100519A1 (en) * | 1971-10-27 | 1972-03-24 | Chevant Claude | |
| US3811151A (en) * | 1972-04-11 | 1974-05-21 | Zarges Leichtbau Gmbh | Joint for collapsible ladders |
| GB2038441A (en) * | 1978-11-11 | 1980-07-23 | Norcros Investments Ltd | Improvements in or relating to ladders |
| GB2090550A (en) * | 1980-12-19 | 1982-07-14 | Yamazaki Keiichiro | A method for producing a railing or the like |
| EP0359970A1 (en) * | 1988-09-06 | 1990-03-28 | Hailo-Werk Rudolf Loh GmbH & Co. KG | Locking hinge for a multipurpose ladder |
| US5022118A (en) * | 1990-06-25 | 1991-06-11 | Wan Dean Industry Co. | Ladder joint with engagement spring member |
-
1998
- 1998-01-14 KR KR1019980000836A patent/KR100251377B1/en not_active IP Right Cessation
- 1998-02-13 EP EP98301074A patent/EP0931904A3/en not_active Withdrawn
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE466463A (en) * | ||||
| FR1122019A (en) * | 1955-02-01 | 1956-08-30 | Nusbaumer & Cie | Improvement in ladder construction |
| FR2100519A1 (en) * | 1971-10-27 | 1972-03-24 | Chevant Claude | |
| US3811151A (en) * | 1972-04-11 | 1974-05-21 | Zarges Leichtbau Gmbh | Joint for collapsible ladders |
| GB2038441A (en) * | 1978-11-11 | 1980-07-23 | Norcros Investments Ltd | Improvements in or relating to ladders |
| GB2090550A (en) * | 1980-12-19 | 1982-07-14 | Yamazaki Keiichiro | A method for producing a railing or the like |
| EP0359970A1 (en) * | 1988-09-06 | 1990-03-28 | Hailo-Werk Rudolf Loh GmbH & Co. KG | Locking hinge for a multipurpose ladder |
| US5022118A (en) * | 1990-06-25 | 1991-06-11 | Wan Dean Industry Co. | Ladder joint with engagement spring member |
Also Published As
| Publication number | Publication date |
|---|---|
| KR100251377B1 (en) | 2000-06-01 |
| EP0931904A2 (en) | 1999-07-28 |
| KR19990065510A (en) | 1999-08-05 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
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|
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| PUAL | Search report despatched |
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|
| 17P | Request for examination filed |
Effective date: 20001117 |
|
| AKX | Designation fees paid |
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|
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION HAS BEEN WITHDRAWN |
|
| 18W | Application withdrawn |
Withdrawal date: 20010305 |