CN111636811A - Building ladder with anti-skidding structure - Google Patents

Building ladder with anti-skidding structure Download PDF

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Publication number
CN111636811A
CN111636811A CN202010516942.0A CN202010516942A CN111636811A CN 111636811 A CN111636811 A CN 111636811A CN 202010516942 A CN202010516942 A CN 202010516942A CN 111636811 A CN111636811 A CN 111636811A
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CN
China
Prior art keywords
small
rear end
fixed mounting
support column
groups
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Granted
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CN202010516942.0A
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Chinese (zh)
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CN111636811B (en
Inventor
朱蓓
段小宁
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Shandong Runchi Construction Engineering Co ltd
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Individual
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Priority to CN202010516942.0A priority Critical patent/CN111636811B/en
Publication of CN111636811A publication Critical patent/CN111636811A/en
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Publication of CN111636811B publication Critical patent/CN111636811B/en
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    • 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
    • E06C7/081Rungs or other treads comprising anti-slip features
    • EFIXED CONSTRUCTIONS
    • E06DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06CLADDERS
    • E06C7/00Component parts, supporting parts, or accessories
    • E06C7/18Devices for preventing persons from falling
    • E06C7/181Additional gripping devices, e.g. handrails
    • E06C7/183Additional gripping devices, e.g. handrails situated along the ladder
    • EFIXED CONSTRUCTIONS
    • E06DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06CLADDERS
    • E06C7/00Component parts, supporting parts, or accessories
    • E06C7/42Ladder feet; Supports therefor
    • E06C7/46Non-skid equipment

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

Abstract

The invention discloses a building ladder with an anti-skid structure, which comprises a support pillar, a first small hydraulic pump, a second small hydraulic pump and a third rotating plate, wherein a support block is fixedly installed at the bottom end of the support pillar, a pedal is fixedly installed on the right side of the support pillar, the first small hydraulic pump is fixedly installed at the rear end of the support pillar, and a first small hydraulic rod is fixedly installed at the rear end of the first small hydraulic pump. The sponge pad is arranged on the anti-skid device, so that workers can step on the surface of the pedal with comfortable feeling, the pedal under feet cannot be pressed against feet, the sponge pad is matched with the anti-skid pad, the wavy shape of the outer side of the anti-skid pad increases the friction force of the shoes of the workers on the surface of the pedal, the anti-skid effect is achieved, the slopes of the two groups of support columns and the wall surface are adjusted through the two groups of first rotating plates, the friction force between the two groups of first support plates and the ground is increased through the two groups of rubber pads fixed to the bottom ends of the two groups of first support plates, and the stable fixing effect is.

Description

Building ladder with anti-skidding structure
Technical Field
The invention relates to the technical field of construction tools, in particular to a ladder stand with an anti-skidding structure for buildings.
Background
The ladder stand for the building is a common tool in the construction process of building engineering, along with the continuous development of modern society, the requirement of the building industry on the ladder stand is gradually enhanced, and in order to reduce the resource waste and improve the stability of the ladder stand, various ladder stands produced by a building tool company are continuously optimized at present.
Because constructors need to stand on the ladder to work sometimes, the stability of the ladder is a crucial factor influencing construction safety, the ladder for the common building is simple in structure and is composed of two columns and a plurality of pedals, and side slipping and rolling accidents easily occur, so that adverse influence is caused to construction operation.
Disclosure of Invention
The invention aims to provide a ladder stand with an anti-skid structure for buildings, which solves the problem that side slipping and rolling accidents are easy to happen in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: a ladder stand with an anti-skid structure for buildings comprises a support column, a first small hydraulic pump, a second small hydraulic pump and a third rotating plate, wherein a support block is fixedly arranged at the bottom end of the support column, a pedal is fixedly arranged on the right side of the support column, the first small hydraulic pump is fixedly arranged at the rear end of the support column, a first small hydraulic rod is fixedly arranged at the rear end of the first small hydraulic pump, a first slider is hinged at the rear end of the first small hydraulic rod, a first rotating plate is hinged at the rear end of the support column, a first chute is formed in the inner wall of the first rotating plate, a first support plate is hinged at the bottom end of the first rotating plate, a connecting column is fixedly arranged at the left side of the first rotating plate, the second small hydraulic pump is fixedly arranged at the rear end of the support column, and a second small hydraulic rod is fixedly arranged at the rear, the rear end of the small-size hydraulic stem of second articulates there is the second slider, the rear end of support column articulates there is the second rotor plate, and the inner wall of second rotor plate has seted up the second spout, the third spout has been seted up to the left side outer wall of support column, and the third spout inner wall inserts and be equipped with the third slider, the right-hand member fixed mounting of third slider has fixed cover, and the inner wall of fixed cover inserts and be equipped with small-size rack, the front end fixed mounting of fixed cover has small-size stopper, the right-hand member fixed mounting of third slider has the axis of rotation, and the outside fixed mounting of axis of rotation has small-size circular gear, the right-hand member fixed mounting of axis of rotation has first connecting plate, the right-hand member of support column articulates there is the second connecting plate, and the right-hand member of second connecting plate articulates.
Preferably, the pedal comprises a second supporting plate, a spongy cushion and a non-slip mat, the spongy cushion is fixedly mounted on the outer side of the second supporting plate, and the non-slip mat is fixedly mounted on the outer side of the spongy cushion.
Preferably, the outer side of the spongy cushion is provided with a hole which is of a diamond structure, and the outer side of the non-slip cushion is wavy.
Preferably, the first sliding block is inserted into the first rotating plate, the outer diameter of the first sliding block is matched with the inner diameter of the first sliding groove, and a rubber pad is fixedly mounted at the bottom end of the first supporting plate.
Preferably, the second sliding block is inserted into the second rotating plate, the diameter of the outer side of the second sliding block is matched with the diameter of the inner side of the second sliding groove, and the rear end of the second rotating plate is fixedly provided with the rubber block.
Preferably, the inside diameter of the third sliding chute is matched with the outside diameter of the third sliding block.
Preferably, the teeth of the small rack are matched with the teeth of the small limiting block, and the small rack is meshed with the small limiting block.
Preferably, the first connecting plate is hinged to the left side of the second connecting plate, and a hook is arranged on the left side of the third rotating plate and is arc-shaped.
Compared with the prior art, the invention has the beneficial effects that:
(1) the device is provided with the foam-rubber cushion, make the staff step on there is the comfort on the footboard surface, the footboard that can not feel under the foot presses against the foot, cooperation and slipmat, the wavy in the slipmat outside, increase staff's shoes are to the frictional force on footboard surface, play anti-skidding effect, adjust the slope of two sets of support columns and wall through two sets of first rotation boards, two sets of rubber pads of two sets of first backup pad bottom mounting, make two sets of first backup pads and ground frictional force increase, to two sets of first rotation boards, play stable fixed action.
(2) The device is through two sets of second rotor plates, it removes to be the arc form on two sets of second rotor plates to drive two sets of small-size hydraulic stem of two sets of seconds, make the rubber piece laminating wall on two sets of second rotor plate tops, two sets of second rotor plates play stable fixed action to two sets of support columns tops through two sets of rubber pieces, two sets of small-size stoppers play limiting displacement to small-size circular gear through small-size rack, prevent that two sets of third rotor plates from descending to two sets of support columns at the back, can't provide the convenience for the staff, two sets of third rotor plates, for the staff provides the place of a handrail, the outside of two sets of third rotor plates is provided with two sets of couples, make things convenient for the staff to hang the instrument on the couple, provide the place of putting the instrument of being convenient for.
Drawings
FIG. 1 is a schematic sectional elevation view of the structure of the present invention;
FIG. 2 is a schematic front view of the structure of the present invention;
FIG. 3 is a schematic side view of the structure of the present invention;
FIG. 4 is a schematic view of the internal structure of the step of the present invention;
FIG. 5 is a schematic side view of an enlarged structure of a support column and a first support plate according to the present invention;
FIG. 6 is a schematic rear view of an enlarged structure of a support column and a first support plate according to the present invention;
FIG. 7 is a side view of an enlarged structure of the supporting pillar and the second sliding chute according to the present invention;
FIG. 8 is an enlarged view of A in FIG. 1;
fig. 9 is an enlarged schematic view of the structure B in fig. 3.
In the figure: 1. a support pillar; 2. a support block; 3. a pedal; 31. a second support plate; 32. a sponge cushion; 33. a non-slip mat; 4. a first small hydraulic pump; 5. a first small hydraulic ram; 6. a first slider; 7. a first rotating plate; 8. a first chute; 9. a first support plate; 10. connecting columns; 11. a second small hydraulic pump; 12. a second small hydraulic ram; 13. a second slider; 14. a second rotating plate; 15. a second chute; 16. a third chute; 17. a third slider; 18. fixing a sleeve; 19. a small rack; 20. a small-sized stopper; 21. a rotating shaft; 22. a small circular gear; 23. a first connecting plate; 24. a second connecting plate; 25. an armrest post; 26. and a third rotating plate.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-9, an embodiment of the present invention is shown:
a ladder stand with an anti-skid structure for buildings comprises a support column 1, a first small hydraulic pump 4, a second small hydraulic pump 11 and a third rotating plate 26, wherein support blocks 2 are fixedly installed at the bottom end of the support column 1, a pedal 3 is fixedly installed at the right side of the support column 1, the pedal 3 comprises a second support plate 31, a sponge pad 32 and a non-slip pad 33, the sponge pad 32 is fixedly installed at the outer side of the second support plate 31, the non-slip pad 33 is fixedly installed at the outer side of the sponge pad 32, a hole is formed in the outer side of the sponge pad 32 and is of a diamond structure, the outer side of the non-slip pad 33 is of a wavy shape, the support column 1 is symmetrically arranged in two groups, two groups of support blocks 2 are fixedly installed at the bottom end of the two groups of support columns 1, a plurality of pedals 3 are fixedly installed between the two groups of support blocks 2, the sponge pads 32 are fixedly installed, the footboard 3 that can not feel under the foot presses against the foot, through setting up slipmat 33, the wave form in the slipmat 33 outside increases staff's shoes and to the frictional force on footboard 3 surface, plays anti-skidding effect.
The rear end of the support column 1 is fixedly provided with a first small hydraulic pump 4, the rear end of the first small hydraulic pump 4 is fixedly provided with a first small hydraulic rod 5, the rear end of the first small hydraulic rod 5 is hinged with a first sliding block 6, the rear end of the support column 1 is hinged with a first rotating plate 7, the inner wall of the first rotating plate 7 is provided with a first sliding chute 8, the bottom end of the first rotating plate 7 is hinged with a first supporting plate 9, the first sliding block 6 is inserted in the first rotating plate 7, the outer diameter of the first sliding block 6 is matched with the inner diameter of the first sliding chute 8, the bottom end of the first supporting plate 9 is fixedly provided with a rubber pad, the first rotating plate 7 is provided with two groups in bilateral symmetry, one group of the two groups of first rotating plates 7 drives one group of the two groups of first rotating plates 7 through a connecting column 10, the first small hydraulic pump 4 adjusts the gradient of the two groups of first rotating plates 7 through the two groups of first small hydraulic rods, thereby reach two sets of first rotation board 7 and will adjust the slope of two sets of support columns 1, two sets of first rotation board 7 play the supporting role to two sets of support columns 1.
The left side of the first rotating plate 7 is fixedly provided with a connecting column 10, the rear end of the supporting column 1 is fixedly provided with a second small hydraulic pump 11, the rear end of the second small hydraulic pump 11 is fixedly provided with a second small hydraulic rod 12, the rear end of the second small hydraulic rod 12 is hinged with a second sliding block 13, the rear end of the supporting column 1 is hinged with a second rotating plate 14, the second sliding block 13 is inserted in the second rotating plate 14, the outer diameter of the second sliding block 13 is matched with the inner diameter of a second sliding chute 15, the rear end of the second rotating plate 14 is fixedly provided with a rubber block, the structure is characterized in that the two groups of second small hydraulic pumps 11 are arranged symmetrically left and right through the second rotating plate 14, the two groups of second small hydraulic pumps 11 drive the two groups of second rotating plates 14 to rotate through the two groups of second small hydraulic rods 12, and are attached to a wall through the rubber blocks fixedly arranged at the top ends of the two groups, so that the two groups of supporting columns 1 are stably attached to the wall surface through the two groups of second rotating plates 14.
The inner wall of the second rotating plate 14 is provided with a second sliding groove 15, the outer wall of the left side of the support column 1 is provided with a third sliding groove 16, a third sliding block 17 is inserted into the inner wall of the third sliding groove 16, the inner diameter of the third sliding groove 16 is matched with the outer diameter of the third sliding block 17, and the third sliding groove 16 and the third sliding block 17 are in sliding connection through the third sliding block 17.
Fixed cover 18 is installed to the right-hand member fixed mounting of third slider 17, and the inner wall of fixed cover 18 is inserted and is equipped with small-size rack 19, the front end fixed mounting of fixed cover 18 has small-size stopper 20, the tooth of small-size rack 19 and the tooth looks adaptation of small-size stopper 20, small-size rack 19 meshes with small-size stopper 20 mutually, this structure is through setting up small-size rack 19, fixed cover 18 is upper and lower symmetry form fixed mounting on the right side of third slider 17, small-size stopper 20 is upper and lower symmetry form and is provided with two sets of small-size stoppers 20 altogether, a set of small-size stopper 20 of two sets of small-size stoppers 20 laminates in a set of below of two sets of fixed covers 18, play limiting displacement to small.
The right end of the third sliding block 17 is fixedly provided with a rotating shaft 21, the outer side of the rotating shaft 21 is fixedly provided with a small circular gear 22, the right end of the rotating shaft 21 is fixedly provided with a first connecting plate 23, the right end of the supporting column 1 is hinged with a second connecting plate 24, the right end of the second connecting plate 24 is hinged with a handrail column 25, the rear end of the supporting column 1 is hinged with a third rotating plate 26, the first connecting plate 23 is hinged on the left side of the second connecting plate 24, the left side of the third rotating plate 26 is provided with a hook which is arc-shaped, the structure is provided with the handrail columns 25, a plurality of groups of handrail columns 25 are unfolded downwards, the plurality of groups of first connecting plates 23 play a supporting role for the plurality of groups of second connecting plates 24, the hands of workers are attached to the surfaces of the two groups of handrail columns 25, convenience and convenience are provided for the workers, two groups of rubber pads are fixedly arranged, the hooks on the outer sides of the two groups of third rotating plates 26 are convenient for workers to hang tools on the hooks.
The working principle is as follows: when the invention is put into use in a construction site, two groups of third rotating plates 26 are upwards rotated in an arc shape, the first small hydraulic pump 4 is started, the first small hydraulic pump 4 drives the first slide block 6 to slide in the first sliding groove 8 through the first small hydraulic rod 5, the first rotating plate 7 is adjusted to a comfortable gradient, two groups of first supporting plates 9 increase the friction force with the ground through the rubber pads at the bottom end, two groups of first supporting plates 9 increase the stability of two groups of supporting columns 1 through two groups of first rotating plates 7, two groups of second small hydraulic pumps 11 drive two groups of second slide blocks 13 to slide in two groups of second sliding grooves 15 through two groups of second small hydraulic rods 12 to adjust the gradient of two groups of second rotating plates 14, the rubber blocks on the top ends of the two groups of second rotating plates 14 are attached to the wall surface, and the two groups of second rotating plates 14 play a stable fixing role above the two groups of supporting columns 1 through the two groups of rubber blocks.
Two groups of handrail columns 25 are unfolded downwards, the two groups of handrail columns 25 drive a plurality of groups of second connecting plates 24 and a plurality of groups of first connecting plates 23 to rotate, the first connecting plates 23 drive a rotating shaft 21 and a small circular gear 22 to rotate, the small circular gear 22 drives a small rack 19 to rotate through teeth, and two groups of small limiting blocks 20 play a limiting role on the small rack 19, so that the two groups of handrail columns 25 are unfolded to proper positions, a worker holds two groups of third rotating plates 26 by hands, a plurality of groups of pedals 3 are moved upwards by feet, a spongy cushion 32 provides comfortable sensation for the sole of the worker, when the worker moves upwards, the antiskid cushion 33 prevents the sole from sideslipping with the surface of the pedal 3, the worker is injured, one group of third rotating plates 26 is provided for the worker, the place of the handrail, two groups of hooks are arranged on the outer sides of the two groups of third rotating plates 26, and the worker can hang tools on the hooks conveniently, provides a place for the worker to place tools conveniently.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims (8)

1. The utility model provides a cat ladder for building with antiskid structure, includes support column (1), first small-size hydraulic pump (4), second small-size hydraulic pump (11) and third rotor plate (26), its characterized in that: the bottom fixed mounting of support column (1) has supporting shoe (2), the right side fixed mounting of support column (1) has footboard (3), the rear end fixed mounting of support column (1) has first small-size hydraulic pump (4), and the rear end fixed mounting of first small-size hydraulic pump (4) has first small-size hydraulic stem (5), the rear end of first small-size hydraulic stem (5) articulates there is first slider (6), the rear end of support column (1) articulates there is first pivot board (7), first spout (8) have been seted up to the inner wall of first pivot board (7), the bottom of first pivot board (7) articulates there is first backup pad (9), the left side fixed mounting of first pivot board (7) has spliced pole (10), the rear end fixed mounting of support column (1) has second small-size hydraulic pump (11), and the rear end fixed mounting of second small-size hydraulic pump (11) has second small-size hydraulic stem (12), the rear end of the small-sized hydraulic rod (12) of second articulates there is second slider (13), the rear end of support column (1) articulates there is second rotor plate (14), and second spout (15) have been seted up to the inner wall of second rotor plate (14), third spout (16) have been seted up to the left side outer wall of support column (1), and third spout (16) inner wall is inserted and is equipped with third slider (17), the right-hand member fixed mounting of third slider (17) has fixed cover (18), and the inner wall of fixed cover (18) is inserted and is equipped with small-size rack (19), the front end fixed mounting of fixed cover (18) has small-size stopper (20), the right-hand member fixed mounting of third slider (17) has axis of rotation (21), and the outside fixed mounting of axis of rotation (21) has small-size circular gear (22), the right-hand member fixed mounting of axis of rotation (21) has first connecting plate, the right-hand member of support column (1) articulates there is second connecting plate (24), and the right-hand member of second connecting plate (24) articulates there is handrail post (25), the rear end of support column (1) articulates there is third rotor plate (26).
2. The ladder stand with antiskid structure for building according to claim 1, wherein: the pedal (3) comprises a second supporting plate (31), a spongy cushion (32) and an anti-slip pad (33), wherein the spongy cushion (32) is fixedly installed on the outer side of the second supporting plate (31), and the anti-slip pad (33) is fixedly installed on the outer side of the spongy cushion (32).
3. A ladder stand for building with anti-skid structure as claimed in claim 2, wherein: the outer side of the spongy cushion (32) is provided with holes which are of a diamond structure, and the outer side of the non-slip cushion (33) is wavy.
4. The ladder stand with antiskid structure for building according to claim 1, wherein: the first sliding block (6) is inserted into the first rotating plate (7), the outer diameter of the first sliding block (6) is matched with the inner diameter of the first sliding groove (8), and a rubber pad is fixedly mounted at the bottom end of the first supporting plate (9).
5. The ladder stand with antiskid structure for building according to claim 1, wherein: the second sliding block (13) is inserted into the second rotating plate (14), the diameter of the outer side of the second sliding block (13) is matched with the diameter of the inner side of the second sliding groove (15), and a rubber block is fixedly mounted at the rear end of the second rotating plate (14).
6. The ladder stand with antiskid structure for building according to claim 1, wherein: the inner diameter of the third sliding chute (16) is matched with the outer diameter of the third sliding block (17).
7. The ladder stand with antiskid structure for building according to claim 1, wherein: the teeth of the small rack (19) are matched with the teeth of the small limiting block (20), and the small rack (19) is meshed with the small limiting block (20).
8. The ladder stand with antiskid structure for building according to claim 1, wherein: the first connecting plate (23) is hinged to the left side of the second connecting plate (24), a hook is arranged on the left side of the third rotating plate (26), and the hook is arc-shaped.
CN202010516942.0A 2020-06-09 2020-06-09 Building ladder with anti-skidding structure Active CN111636811B (en)

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Application Number Priority Date Filing Date Title
CN202010516942.0A CN111636811B (en) 2020-06-09 2020-06-09 Building ladder with anti-skidding structure

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Application Number Priority Date Filing Date Title
CN202010516942.0A CN111636811B (en) 2020-06-09 2020-06-09 Building ladder with anti-skidding structure

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CN111636811B CN111636811B (en) 2022-02-08

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114215470A (en) * 2021-12-20 2022-03-22 罗益机械制造(苏州)有限公司 Multistage connection formula metallic steel structure cat ladder structure

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003262044A (en) * 2002-03-07 2003-09-19 Gop Kk Portable workbench
CN204591091U (en) * 2015-03-21 2015-08-26 梁少文 The emergency staircase of building site
US20170009528A1 (en) * 2014-01-23 2017-01-12 David Brain PASCUT Ladder Leveling And Stabilizing Assembly
CN107956414A (en) * 2018-01-12 2018-04-24 海宁市盈向家居设计有限公司 A kind of finishing aerial ladder easy to storage
CN207960464U (en) * 2018-03-20 2018-10-12 杨慧芳 A kind of device of auxiliary 10KV distribution lines construction
CN208330165U (en) * 2018-04-08 2019-01-04 武汉顺发昌建设工程有限公司 A kind of folding type aluminum alloy double ladder
CN110778256A (en) * 2019-09-29 2020-02-11 许继电气股份有限公司 Fireproof door system

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003262044A (en) * 2002-03-07 2003-09-19 Gop Kk Portable workbench
US20170009528A1 (en) * 2014-01-23 2017-01-12 David Brain PASCUT Ladder Leveling And Stabilizing Assembly
CN204591091U (en) * 2015-03-21 2015-08-26 梁少文 The emergency staircase of building site
CN107956414A (en) * 2018-01-12 2018-04-24 海宁市盈向家居设计有限公司 A kind of finishing aerial ladder easy to storage
CN207960464U (en) * 2018-03-20 2018-10-12 杨慧芳 A kind of device of auxiliary 10KV distribution lines construction
CN208330165U (en) * 2018-04-08 2019-01-04 武汉顺发昌建设工程有限公司 A kind of folding type aluminum alloy double ladder
CN110778256A (en) * 2019-09-29 2020-02-11 许继电气股份有限公司 Fireproof door system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114215470A (en) * 2021-12-20 2022-03-22 罗益机械制造(苏州)有限公司 Multistage connection formula metallic steel structure cat ladder structure

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Inventor after: Niu Yufeng

Inventor after: Ma Yutao

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Inventor after: Zhu Bei

Inventor after: Duan Xiaoning

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Effective date of registration: 20220117

Address after: 255000 floor 3, block B, Boda Plaza, 272 Huaguang Road, Zhangdian District, Zibo City, Shandong Province

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