CN108194019A - A kind of Construction Safety folding ladder - Google Patents

A kind of Construction Safety folding ladder Download PDF

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Publication number
CN108194019A
CN108194019A CN201711459167.4A CN201711459167A CN108194019A CN 108194019 A CN108194019 A CN 108194019A CN 201711459167 A CN201711459167 A CN 201711459167A CN 108194019 A CN108194019 A CN 108194019A
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CN
China
Prior art keywords
fixedly connected
bar shaped
round
bar
machined
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.)
Granted
Application number
CN201711459167.4A
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Chinese (zh)
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CN108194019B (en
Inventor
魏敏生
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Hubei Rui Building Engineering Co Ltd
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Individual
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Filing date
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Priority to CN201711459167.4A priority Critical patent/CN108194019B/en
Publication of CN108194019A publication Critical patent/CN108194019A/en
Application granted granted Critical
Publication of CN108194019B publication Critical patent/CN108194019B/en
Expired - Fee Related 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
    • E06C5/00Ladders characterised by being mounted on undercarriages or vehicles Securing ladders on vehicles
    • E06C5/02Ladders characterised by being mounted on undercarriages or vehicles Securing ladders on vehicles with rigid longitudinal members
    • E06C5/04Ladders characterised by being mounted on undercarriages or vehicles Securing ladders on vehicles with rigid longitudinal members capable of being elevated or extended ; Fastening means during transport, e.g. mechanical, hydraulic
    • EFIXED CONSTRUCTIONS
    • E06DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06CLADDERS
    • E06C1/00Ladders in general
    • E06C1/02Ladders in general with rigid longitudinal member or members
    • E06C1/38Special constructions of ladders, e.g. ladders with more or less than two longitudinal members, ladders with movable rungs or other treads, longitudinally-foldable ladders
    • E06C1/383Foldable ladders in which the longitudinal members are brought together on folding
    • EFIXED CONSTRUCTIONS
    • E06DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06CLADDERS
    • E06C7/00Component parts, supporting parts, or accessories

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Ladders (AREA)

Abstract

The invention discloses a kind of Construction Safety folding ladders,Including firm banking,The firm banking upper surface is machined with bar shaped groove at center,Left-hand face is machined with round bearing groove in the bar shaped groove,Right lateral surface is fixedly connected with and the corresponding positioning annulus of round bearing groove in the bar shaped groove,The circle bearing groove inner surface is fixedly connected with the miniature electric rotating machine that round end is horizontal direction,The round end of the miniature electric rotating machine is fixedly connected with the rotation round bar to match with positioning annulus,The rotation round bar side surface is set with a pair of of rectangle link block,Each rectangle link block upper surface has been fixedly connected with bar shaped handrail,A pair of bar shaped handrail side surface is fixedly connected with multiple foot-driven levers,Each bar shaped handrail side surface upper end is machined with round connecting hole,Rotary shaft is embedded in a pair of round connecting hole.The invention has the advantages that of simple structure and strong practicability.

Description

A kind of Construction Safety folding ladder
Technical field
The present invention relates to terraced field for building, particularly a kind of Construction Safety folding ladders.
Background technology
In the work progress of construction site, operator's truck work is in most cases needed, it is therefore desirable to using to stepping on High auxiliary tool.
Common buildings worker ascends a height auxiliary tool using tripod, and common tripod structure is fairly simple, floor space It is larger, it has not been convenient to carry, it is therefore desirable to a kind of lift convenient for folding ensures the stabilization safe effect of device, furthermore such that Device has power saving function, is offering convenience property of constructing operation convenient for fixation, therefore it is necessary to set the present apparatus.
Invention content
The purpose of the present invention is to solve the above problems, devise a kind of Construction Safety folding ladder.
Realize above-mentioned purpose the technical scheme is that, a kind of Construction Safety folding ladder, including firm banking, institute State the support stabilizer blade that firm banking lower surface four corners are fixedly connected with two pairs of telescopic hydraulic-pressure sleeve structures, the fixed bottom Seat is machined with bar shaped groove at the center of upper surface, and left-hand face is machined with round bearing groove, the bar shaped in the bar shaped groove In straight slot right lateral surface be fixedly connected with the round corresponding positioning annulus of bearing groove, be both provided in the both sides of bar shaped groove One auxiliary rises support protrusion, and the circle bearing groove inner surface is fixedly connected with the miniature rotation that round end is horizontal direction Motor, the round end of the miniature electric rotating machine are fixedly connected with the rotation round bar to match with positioning annulus, the rotation circle Bar side surface is set with a pair of of rectangle link block, and each rectangle link block upper surface has been fixedly connected with bar shaped handrail, and one Multiple foot-driven levers are fixedly connected with to the bar shaped handrail side surface, each foot-driven lever is telescopic hydraulic-pressure sleeve structure, often A bar shaped handrail side surface upper end is machined with round connecting hole, and rotary shaft is embedded in a pair of round connecting hole, Rotation shaft side surface fixing sleeve is also associated with electro-motor equipped with a pair of U-shaped connection sheet, rotary shaft, each U-shaped company Contact pin side surface has been fixedly connected with automatically controlled telescopic strut, and each described automatically controlled telescopic strut one end, which has been fixedly connected with, is vertically arranged branch Bar, each described to be vertically arranged strut one end and be fixedly connected with No.1 electromagnet, the bar shaped groove following table surface rear end is machined with one To circular groove, lower surface is fixedly connected with No. two electromagnetism to match with No.1 electromagnet in each circular groove Iron, bar shaped groove lower surface front end are machined with rectangular channel, and lower surface is equipped with solar panels, the fixation in the rectangular channel Bar shaped bearing groove is machined at base lower surface center, upper surface is equipped with energy converter and electric power storage in the bar shaped bearing groove Pond, the firm banking lower surface are connected with the active catch door to match with bar shaped bearing groove, described firm banking or so Both side surface has been fixedly connected with fixed bandage, one of them described fixed bandage side surface is fixedly connected with sub- velcro, In another described fixed bandage side surface be fixedly connected with the female velcro to match with sub- velcro;
When operation completion carries out receiving ladder, telescopic strut automatically controlled first is shunk, and then rotary shaft drives two U-shaped companies Contact pin is rotated to the plane formed with two bar shaped handrails in locking action is carried out behind 15 ° of position, and then each foot-driven lever is shunk To vertical same position, then miniature electric rotating machine drives rotation round bar to rotate, until two are vertically arranged strut and bear against two A auxiliary rises one in support protrusion nearby, when carrying out ladder operation, is first released from the locking action of rotary shaft, electronic horse It is rotated counterclockwise simultaneously under the drive of electro-motor and miniature electric rotating machine respectively up to drive rotary shaft and rotation round bar, wherein The angular velocity of rotation of miniature electric rotating machine is slightly less than electro-motor, and automatically controlled telescopic strut persistently extends during this period, until automatically controlled The vertical pole of telescopic strut front end be detached from auxiliary rise support protrusion against to complete during ladder bar shaped handrail and perpendicular The initial of allotment bar rises starting operation.
Firm banking lower surface four corners are fixedly connected with two pairs of support stabilizer blades, each support stabilizer blade lower surface It has been fixedly connected with improved mat.
Rotation shaft side surface both ends are set with a pair of of rounded tabs.
Each foot-driven lever upper surface has been fixedly connected with rubber antiskid pad.
The rectangular channel inner surface upper end is fixedly connected with light transmission protection board.
A kind of Construction Safety folding ladder made using technical scheme of the present invention improves construction worker construction behaviour The convenience of work is conducive to carry, and facilitates folding, structure novel, use value height.
Description of the drawings
Fig. 1 is a kind of structure diagram of Construction Safety folding ladder of the present invention;
Fig. 2 is a kind of front sectional view of Construction Safety folding ladder of the present invention;
In figure, 1, firm banking;2nd, annulus is positioned;3rd, miniature electric rotating machine;4th, round bar is rotated;5th, rectangle link block;6、 Bar shaped handrail;7th, foot-driven lever;8th, rotary shaft;9th, U-shaped connection sheet;10th, automatically controlled telescopic strut;11st, it is vertically arranged strut;12nd, No.1 electricity Magnet;13rd, No. two electromagnet;14th, solar panels;15th, energy converter;16th, accumulator;17th, active catch door;18th, fixation is tied up Band;19th, sub- velcro;20th, female velcro;21st, stabilizer blade is supported;22nd, improved mat;23rd, rounded tabs;24th, rubber antiskid pad; 25th, light transmission protection board.
Specific embodiment
The present invention is specifically described below in conjunction with the accompanying drawings, as shown in Figs. 1-2, a kind of Construction Safety folding ladder, Including firm banking 1, it is machined with bar shaped groove at the 1 upper surface center of firm banking, left-hand face in the bar shaped groove Round bearing groove is machined with, right lateral surface is fixedly connected with and the corresponding positioning annulus of round bearing groove in the bar shaped groove 2, the circle bearing groove inner surface is fixedly connected with the miniature electric rotating machine 3 that round end is horizontal direction, the Miniature The round end of rotating motor 3 is fixedly connected with the rotation round bar 4 to match with positioning annulus 2,4 side surface of rotation round bar suit There is a pair of of rectangle link block 5, each 5 upper surface of rectangle link block has been fixedly connected with bar shaped handrail 6, a pair of bar shaped 6 side surface of handrail is fixedly connected with multiple foot-driven levers 7, and each 6 side surface upper end of bar shaped handrail is machined with round connection Hole, a pair of round connecting hole is interior embedded with rotary shaft 8, and the 8 side surface fixing sleeve of rotary shaft is equipped with a pair of U-shaped connection sheet 9, each U-shaped 9 side surface of connection sheet has been fixedly connected with automatically controlled telescopic strut 10, each automatically controlled telescopic strut 10 1 End has been fixedly connected with and is vertically arranged strut 11, it is each it is described be vertically arranged 11 one end of strut and be fixedly connected with No.1 electromagnet 12, it is described Bar shaped groove following table surface rear end is machined with a pair of of circular groove, and lower surface has been fixedly connected with and one in each circular groove No. two electromagnet 13 that number electromagnet 12 matches, bar shaped groove lower surface front end is machined with rectangular channel, the rectangular channel Interior lower surface is equipped with solar panels 14, and bar shaped bearing groove, the bar shaped carrying are machined at the 1 lower surface center of firm banking Upper surface is equipped with energy converter 15 and accumulator 16 in slot, and 1 lower surface of firm banking is connected with to be carried with bar shaped The active catch door 17 that slot matches, 1 left and right sides surface of firm banking have been fixedly connected with fixed bandage 18, one of them 18 side surface of fixed bandage is fixedly connected with sub- velcro 19, and 18 side surface of bandage is fixed described in other in which and fixes company It is connected to the female velcro 20 to match with sub- velcro 19;The 1 lower surface four corners of firm banking are fixedly connected with two pairs of branch Stabilizer blade 21 is supportted, 21 lower surface of each support stabilizer blade has been fixedly connected with improved mat 22;The 8 side surface both ends of rotary shaft It is set with a pair of of rounded tabs 23;Each 7 upper surface of foot-driven lever has been fixedly connected with rubber antiskid pad 24;The rectangular channel Inner surface upper end is fixedly connected with light transmission protection board 25.
The characteristics of the present embodiment is that firm banking 1 ensures the stability of device, item for fixed carrying whole device Shape straight slot facilitates ladder collapses storage transport, and positioning annulus 2 matches with rotation round bar 4 ensures fixed effect, miniature electric rotating Machine 3 rotates, and is conducive to rotation round bar 4 and rotates, therefore the bar shaped handrail 6 being fixedly connected on a pair of of rectangle link block 5 is driven to adjust Gradient is conducive to control ladder height, and for multiple foot-driven levers 7 convenient for scaling a ladder, a pair of of circle connecting hole facilitates rotary shaft 8 to revolve Turn, 10 extension and contraction control of automatically controlled telescopic strut so as to be fixedly connected according to the U-shaped connection sheet 9 of control of gradient of bar shaped handrail 6 is high Degree, automatically controlled telescopic strut 10 control ladder height by telescopic action, ensure that ladder flexible modulation tilts fixed effect, are vertically arranged branch Bar 11 supports ladder convenient for being vertically arranged on direction, and No.1 electromagnet 12 matches with No. two electromagnet 13, is conducive to fixation and is vertically arranged branch Bar 11 increases fastness convenient for ladder, and solar panels 14 absorb solar energy, electricity is converted solar energy by energy converter 15 It can be stored in accumulator 16 and be used for device, reach energy-saving effect, improve the convenience of construction worker's constructing operation, favorably In carrying, facilitate folding, structure novel, use value height.
In the present embodiment, programmable Series Controller and a motor driving are installed first at the present apparatus free time Device, by taking the controller of MAM-200 models as an example, by seven leading-out terminals of the model controller by conducting wire respectively with an electricity Machine driver, miniature electric rotating machine 3, automatically controlled telescopic strut 10,12, No. two electromagnet 13 of No.1 electromagnet, 14 and of solar panels The input terminal connection of energy converter 15, those skilled in the art pass through conducting wire and miniature electric rotating machine 3 in Jiang Yitai motor drivers Terminals connection.After those skilled in the art are by controller programming, the job order of the fully controllable each electrical part of system, specific work It is as follows to make principle:For firm banking 1 for fixed carrying whole device, bar shaped groove facilitates ladder collapses storage transport, and circle is held Slot is carried for bearing micro electric rotating machine 3, positioning annulus 2 matches with rotation round bar 4 ensures fixed effect, miniature electric rotating machine 3 rotations are conducive to rotation round bar 4 and rotate, therefore the adjustment of bar shaped handrail 6 being fixedly connected on a pair of of rectangle link block 5 is driven to incline Gradient, convenient for scaling a ladder, a pair of of circle connecting hole is used to be embedded in rotary shaft 8 multiple foot-driven levers 7, and rotary shaft 8 is facilitated to rotate, from And the 10 extension and contraction control height of automatically controlled telescopic strut being fixedly connected according to the U-shaped connection sheet 9 of control of gradient of bar shaped handrail 6, it erects It puts strut 11 and supports ladder convenient for being vertically arranged on direction, No.1 electromagnet 12 matches with No. two electromagnet 13 in circular groove, Be conducive to fix and be vertically arranged strut 11, for carrying solar panels 14, bar shaped bearing groove carries energy converter 15 and stores rectangular channel Battery 16, solar panels 14 absorb solar energy, convert solar energy into electric energy by energy converter 15 and be stored in accumulator 16 Interior to be used for device, active catch door 17 plays the role of seal protection, fixes sub- velcro 19 and female velcro 20 on bandage 18 The fixed ladder for tying up gold contraction is matched, carrying easy to carry, two pairs of support stabilizer blades 21, which increase balance when ladder uses, to be fixed Effect, 22 increasing friction force of improved mat improve stability, and a pair of of rounded tabs 23 protect rotary shaft 8 to prevent from taking off in rotation It falls, the rubber antiskid pad 24 on foot-driven lever 7 plays fixed antiskid effect, and light transmission protection board 25 plays light transmission protective effect.
Further in order to realize that ladder has smaller folding volume, the width dimensions and bar shaped for reducing firm banking are helped Two couple that firm banking (1) lower surface four corners are fixedly connected is supported stabilizer blade (21) to be set as telescopic liquid by the length of bar 6 Pressing sleeve barrel structure can carry out the adjusting of more height dimensions, in addition each foot-driven lever with the bar shaped handrail 6 for realizing same size Be improved to can multi-expansion hydraulic-pressure sleeve structure, realize fold when have smaller width dimensions.
In addition the initial liter of the rise of the ladder in above-described embodiment and the vertical pole being connected in U-shaped connection sheet 9 It is the single rotation completion for being driven by miniature electric rotating machine and rotating strut 4 to play startup, but rotates strut and be located at ladder One end of length direction, the torque that rotation applies need to rise ladder and U-shaped connection sheet, therefore design one greatly very much Kind can generate the structure for rising and holding up torque simultaneously from the both ends of ladder, and the present invention cleverly borrows erecting in above-described embodiment Allotment bar realizes that specific improved structure is:Auxiliary is respectively arranged in the both sides of bar shaped groove and rises support protrusion, rotary shaft (8) electro-motor is also associated with, when operation completion carries out receiving ladder, telescopic strut (10) automatically controlled first is shunk, Ran Houxuan Shaft (8) is locked after two U-shaped connection sheets is driven to rotate the position to the plane formed with two bar shaped handrails (6) in 15 ° Tight action, then each foot-driven lever (7) is contracted to vertical same position, and then miniature electric rotating machine (3) drives rotation round bar Rotation, until two are vertically arranged strut (11) and bear against two one assisted in rise support protrusions nearby;
When carrying out ladder operation, the locking action of rotary shaft (8) is first released from, electro-motor drives rotary shaft (8) and turns Dynamic round bar rotates counterclockwise simultaneously under the drive of electro-motor and miniature electric rotating machine respectively, during this period automatically controlled telescopic strut (10) lasting elongation, until the vertical pole (11) of automatically controlled telescopic strut (10) front end is detached from auxiliary and rises supporting for support protrusion It leans on, starting operation is risen to complete bar shaped handrail and the initial of vertical pole during ladder.
Its operation principle is:Before rise action is started, two U-shaped connection sheets, which are rotated to two bar shaped handrails (6), to be formed Plane be in 15 ° of position so that the U-shaped connection sheet of ladder project slightly from the bar shaped groove of firm banking in order to, with So that vertical pole rises support protrusion against auxiliary, then start rise action and start, electro-motor drives rotary shaft (8) to revolve Turn, so as to drive U-shaped connection sheet and thereon vertical pole rotation, but vertical pole by auxiliary rise support protrusion against, Vertical pole can not rotate, and can generate a reaction force for being applied to rotary shaft, which so that rotary shaft (8) is whole Body, which reversely rotates, to be pushed, and in this process, the rotation strut positioned at the ladder other end drives item under the drive of micromotor Shape handrail (6) rotation is risen, therefore can realize the torque that both ends are risen simultaneously to a direction of rotation so that ladder is smooth It rises.
While the design causes vertical pole after normal rise as auxiliary support structure, primary starting rank is being risen Section can also be used as auxiliary raising structure, and the lift operation efficiency of ladder is greatly improved while ladder structure complexity is reduced
Above-mentioned technical proposal only embodies the optimal technical scheme of technical solution of the present invention, those skilled in the art The principle of the present invention is embodied to some variations that some of which part may be made, belongs to the scope of protection of the present invention it It is interior.

Claims (5)

  1. A kind of 1. Construction Safety folding ladder, including firm banking (1), which is characterized in that firm banking (1) lower surface Four corners are fixedly connected with the support stabilizer blade (21) of two pairs of telescopic hydraulic-pressure sleeve structures, firm banking (1) upper surface It is machined with bar shaped groove at center, left-hand face is machined with round bearing groove in the bar shaped groove, right in the bar shaped groove Side surface is fixedly connected with and the corresponding positioning annulus (2) of round bearing groove, and it is auxiliary to be both provided with one in the both sides of bar shaped groove Rise support protrusion is helped, the circle bearing groove inner surface is fixedly connected with the miniature electric rotating machine that round end is horizontal direction (3), the round end of the miniature electric rotating machine (3) is fixedly connected with the rotation round bar (4) to match with positioning annulus (2), institute It states rotation round bar (4) side surface and is set with a pair of of rectangle link block (5), each rectangle link block (5) upper surface is fixed Bar shaped handrail (6) is connected with, a pair of bar shaped handrail (6) side surface is fixedly connected with multiple foot-driven levers (7), each foot-driven lever (7) for telescopic hydraulic-pressure sleeve structure, each bar shaped handrail (6) side surface upper end is machined with round connecting hole, and one To, embedded with rotary shaft (8), rotary shaft (8) side surface fixing sleeve is equipped with a pair of U-shaped connection sheet in the round connecting hole (9), rotary shaft (8) is also associated with electro-motor, and each U-shaped connection sheet (9) side surface has been fixedly connected with automatically controlled flexible Strut (10), each described automatically controlled telescopic strut (10) one end, which has been fixedly connected with, is vertically arranged strut (11), each described to be vertically arranged branch Bar (11) one end has been fixedly connected with No.1 electromagnet (12), and the bar shaped groove following table surface rear end is machined with a pair of round recessed Slot, each lower surface is fixedly connected with No. two electromagnet to match with No.1 electromagnet (12) in the circular groove (13), bar shaped groove lower surface front end is machined with rectangular channel, and lower surface is equipped with solar panels (14), institute in the rectangular channel It states and bar shaped bearing groove is machined at firm banking (1) lower surface center, upper surface is converted equipped with energy in the bar shaped bearing groove Device (15) and accumulator (16), firm banking (1) lower surface are connected with the active catch to match with bar shaped bearing groove Door (17), firm banking (1) left and right sides surface have been fixedly connected with fixed bandage (18), one of them described fixation is tied up Band (18) side surface is fixedly connected with sub- velcro (19), and bandage (18) side surface is fixed described in other in which and is fixedly connected with The female velcro (20) to match with sub- velcro (19);
    When operation completion carries out receiving ladder, telescopic strut (10) automatically controlled first is shunk, and then rotary shaft (8) drives two U Type connection sheet is rotated to the plane formed with two bar shaped handrails (6) in locking action is carried out behind 15 ° of position, is then each ridden Bar (7) is contracted to vertical same position, and then miniature electric rotating machine (3) drives rotation round bar (4) to rotate, until two are vertically arranged Two auxiliary that strut (11) bear against rise one in support protrusion nearby, when carrying out ladder operation, are first released from rotation The locking action of axis (8), electro-motor drive rotary shaft (8) and rotation round bar (4) respectively in electro-motor and miniature electric rotating It rotates under the drive of machine (3) while counterclockwise, wherein the angular velocity of rotation of miniature electric rotating machine (3) is slightly less than electro-motor, Automatically controlled telescopic strut (10) persistently extends during this, until the vertical pole (11) of automatically controlled telescopic strut (10) front end is detached from auxiliary Rise support protrusion against, with complete bar shaped handrail (6) and vertical pole (11) during ladder it is initial rise to start move Make.
  2. A kind of 2. Construction Safety folding ladder according to claim 1, which is characterized in that each support stabilizer blade (21) lower surface has been fixedly connected with improved mat (22).
  3. A kind of 3. Construction Safety folding ladder according to claim 1, which is characterized in that rotary shaft (8) side table Face both ends are set with a pair of of rounded tabs (23).
  4. A kind of 4. Construction Safety folding ladder according to claim 1, which is characterized in that each foot-driven lever (7) Upper surface has been fixedly connected with rubber antiskid pad (24).
  5. A kind of 5. Construction Safety folding ladder according to claim 1, which is characterized in that the rectangular channel inner surface Upper end is fixedly connected with light transmission protection board (25).
CN201711459167.4A 2017-12-28 2017-12-28 A kind of Construction Safety folding ladder Expired - Fee Related CN108194019B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201711459167.4A CN108194019B (en) 2017-12-28 2017-12-28 A kind of Construction Safety folding ladder

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201711459167.4A CN108194019B (en) 2017-12-28 2017-12-28 A kind of Construction Safety folding ladder

Publications (2)

Publication Number Publication Date
CN108194019A true CN108194019A (en) 2018-06-22
CN108194019B CN108194019B (en) 2019-03-15

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN201711459167.4A Expired - Fee Related CN108194019B (en) 2017-12-28 2017-12-28 A kind of Construction Safety folding ladder

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Country Link
CN (1) CN108194019B (en)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0244668A2 (en) * 1986-04-26 1987-11-11 Iveco Magirus Aktiengesellschaft Ladder arrangement with extendable ladder sections, particularly a fire ladder
EP0657614A1 (en) * 1993-12-09 1995-06-14 Fook Khean Wong Convertible ladder assembly
WO2004044365A2 (en) * 2002-11-11 2004-05-27 Wing Enterprises Combination ladders, ladder components and methods of manufacturing same
CN201363084Y (en) * 2009-02-12 2009-12-16 阮小华 Folding ladder
CN203066846U (en) * 2013-01-04 2013-07-17 魏华昌 Multifunctional portable folding ladder
CN106629528A (en) * 2017-01-06 2017-05-10 国家电网公司 Mobile folding elevator convenient for public variable platform area operation

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0244668A2 (en) * 1986-04-26 1987-11-11 Iveco Magirus Aktiengesellschaft Ladder arrangement with extendable ladder sections, particularly a fire ladder
EP0657614A1 (en) * 1993-12-09 1995-06-14 Fook Khean Wong Convertible ladder assembly
WO2004044365A2 (en) * 2002-11-11 2004-05-27 Wing Enterprises Combination ladders, ladder components and methods of manufacturing same
CN201363084Y (en) * 2009-02-12 2009-12-16 阮小华 Folding ladder
CN203066846U (en) * 2013-01-04 2013-07-17 魏华昌 Multifunctional portable folding ladder
CN106629528A (en) * 2017-01-06 2017-05-10 国家电网公司 Mobile folding elevator convenient for public variable platform area operation

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