CN109930852A - A kind of integral lifting hoistway steel platform protective device - Google Patents
A kind of integral lifting hoistway steel platform protective device Download PDFInfo
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- CN109930852A CN109930852A CN201910347823.4A CN201910347823A CN109930852A CN 109930852 A CN109930852 A CN 109930852A CN 201910347823 A CN201910347823 A CN 201910347823A CN 109930852 A CN109930852 A CN 109930852A
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- platform
- hoistway
- otic placode
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 49
- 239000010959 steel Substances 0.000 title claims abstract description 49
- 230000001681 protective effect Effects 0.000 title claims abstract description 19
- 238000006073 displacement reaction Methods 0.000 claims abstract description 5
- 210000000988 bone and bone Anatomy 0.000 claims description 13
- 238000003466 welding Methods 0.000 claims description 10
- 230000002265 prevention Effects 0.000 claims description 5
- 210000002421 cell wall Anatomy 0.000 claims description 3
- 239000011159 matrix material Substances 0.000 claims description 3
- 239000002184 metal Substances 0.000 claims description 3
- 239000000725 suspension Substances 0.000 claims description 3
- 238000010276 construction Methods 0.000 abstract description 13
- 230000007812 deficiency Effects 0.000 abstract description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 7
- 230000008901 benefit Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
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- Lift-Guide Devices, And Elevator Ropes And Cables (AREA)
Abstract
The present invention relates to a kind of integral lifting hoistway steel platform protective device, main body includes platform panel and skeleton, vertical legs, oblique supporting leg, left and right card leg and platform otic placode and lifting lug.Platform Lug is welded on above platform panel and skeleton, vertical legs and oblique supporting leg are mounted below platform panel and skeleton by platform otic placode, it is assembled and is interconnected by bolt in the lower end of vertical legs and oblique supporting leg, whole rectangular triangle, utilize device itself component load, it is not required to extraneous support, in addition to hoistway hole can be made to obtain horizontal totally-enclosed protection, it also enhances setting and promotes the simplicity and agility of displacement, it overcomes and promotes that difficulty is big and there are the deficiencies of security risk in the prior art, effectively it is connected and provides convenience with what is worked between other work posts for hoistway protection, it is advantageously ensured that engineering production efficiency and saving construction cost, structure is simple and scientific and reasonable, it is safe and reliable and at low cost, and it is used in turn for scene, there is very strong practicability.
Description
Technical field
The present invention relates to capital construction facility technology field, especially a kind of entirety convenient for site safety installation and construction usage
Hoisting type hoistway steel platform protective device.
Background technique
With the development of Chinese society economy and construction business, high-rise, super high-rise building institute's accounting in Building Trade in China
Weight is increasing.In the main structure construction of skyscraper, elevator shaft vertically protect and hoistway in constructing operation be one
Key job.Hoistway scaffold made of the protection of existing elevator shaft is set up as steel pipe, fastener mostly is filled the post of, frame body according to point
Section overhanging, when structure construction, operating personnel carries out operation by hoistway scaffold.It is set up since hoistway scaffold needs every layer, frame
Son set up cannot such as be formed with structure construction it is effective be connected, the construction period will be influenced, while cannot completely enclose inside hoistway,
Easy generating material falls the case where injuring construction personnel, thus there are security risks.Occurs a kind of hoistway in the market in recent years
Two lifting beams are assembled into the whole promotion boom device for meeting tunnel dimension, when hoistway is constructed, in advance by the device of lifting beam in advance
Lifting beam hole is stayed, then the whole boom device that promoted is installed in hoistway structure hole to be provided, every one layer of the construction of structure, operation people
The whole boom device that promoted correspondingly is promoted one layer using tower crane by member, to realizing hoistway protection, meet construction demand have certain side
Help effect.But in practice, it has been found that lifting beam both ends pole is not easy to protrude into reserved opening, takes when promoting whole promotion boom device
There is security risk in expenses of labour power, simultaneously as hoistway hole still uses steel pipe scaffold to protect, do not obtained inside hoistway again
It is totally-enclosed, therefore larger, protective performance owes improved deficiency in the presence of construction and promotion difficulty, from practicability, economy and safety
Property angle consider owe ideal.
Summary of the invention
The invention aims to overcome the existing whole boom device that promoted to promote unstable, the incomplete defect of protection, mention
It is promoted for one kind when hoistway structure is constructed convenient and can ensure that hoistway vertically protects comprehensive integral lifting steel platform to protect
Device.
Integral lifting hoistway steel platform protective device of the invention, main body include platform panel and skeleton and vertical branch
Leg is characterized in that: further including oblique supporting leg and left and right card leg, hoistway steel platform protective device is integrally in by platform panel and bone
The right triangular shape that frame, vertical legs, oblique supporting leg and the assembly interconnection of card leg are constituted, in which:
The platform panel and skeleton have the function of whole load-bearing and totally-enclosed protection hoistway, include outer skeleton, in-seam
Frame, platform otic placode, Platform Lug peace deck plate；
The dermoskeleton frame body is in interconnect the box shape being formed by welding by square steel tube end, includes preceding outline border side, rear outline border
In, left outside frame and right outer frame side；
The in-seam frame body is in " well " shape being made of square steel tube cross weld, and fixation is welded in exo-skeletal, is wrapped
Contain preceding in-seam item, rear in-seam item, left inside bone item and right in-seam item；
The platform otic placode is made of the sheet steel equipped with bolt pilot hole E, includes that fixation is welded on left inside bone item
Left front otic placode and left back otic placode, fixation be welded on otic placode behind the right front ear plate on right in-seam item and the right side；
The Platform Lug is made of the sheet steel for being equipped with lifting hole(eyelet), include it is fixed be welded on left inside bone item left front hang
Ear and left back lifting lug, the fixed right front lifting lug and right rear lifting lug being welded on right in-seam item；
The platform panel is filled the post of by decorative pattern sheet metal, and the spanning platform lifting lug that cracks, fixation are welded on outer skeleton and inner frame
Upper surface on；
The vertical legs have the function of bearing vertical load, include the left and right pillar made of channel steel and to be welded on a left side
Between right column, several interconnection cross bar A made of square steel tube, be provided on the upper end slot bottom of left and right pillar be convenient for and a left side
Front ear plate and right vestibule crab bolt assembly interconnection bolt pilot hole A, nearly lower end slot bottom on be provided be convenient for and oblique supporting leg
It assembles the bolt pilot hole B of interconnection, be provided with card leg welding base on cell wall；
The oblique supporting leg has oblique drawknot and bears platform load, forms opposite bearing pressure with overall structure, ensures platform
It is located stable function, includes the left and right inclined strut made of channel steel and is welded between the inclined strut of left and right, by square steel control
At several interconnection cross bar Bs, be provided on the nearly upper end slot bottom of left and right inclined strut be convenient for and left back otic placode and the right side after otic placode
The bolt pilot hole C of bolt assembly interconnection, it is provided with convenient for the left and right pillar lower end spiral shell with vertical legs 2 on nearly lower end slot bottom
The bolt pilot hole D of bolt assembly interconnection；
The card leg has the function of limiting vertical supports and bears platform entirety vertical load, and main body is in made of channel steel
The angle square shape that diagonal brace item and horizontal stay are constituted, fixation are welded on the card leg welding base of left and right pillar；
In the assembled condition, the upper end of the vertical legs and oblique supporting leg passes through the bolt pilot hole on left and right pillar respectively
A, otic placode corresponds to bolt behind the bolt pilot hole C on the inclined strut of left and right and left front otic placode and right front ear plate and left back otic placode and the right side
The lower section of platform panel and skeleton is assembled, is fixed at, the lower end of oblique supporting leg passes through the bolt pilot hole D and spiral shell
The assembly interconnection of bolt pilot hole B bolt, form right angle triangle matrix, fixation is welded on left inside bone to the Platform Lug respectively
On the anteroposterior position of item and right in-seam item, be in overhanging shape, constitute by left and right pillar vertical support, by left and right inclined strut inclined shore institute
The platform panel and skeleton stated and by card leg by hold in structural beams it is in place, be covered on hoistway, simultaneously by platform panel and skeleton
It can be by Platform Lug by the right triangular shape integral lifting hoistway steel platform protective device of the random hanging displacement of loop wheel machine.
As long as reliably being interconnected in use, Platform Lug is passed through lifting hole(eyelet) with the suspension hook on tower crane steel wire cable, i.e., can incite somebody to action
Terrace prevention device is integrally sling, and vertical legs is made to be close to hoistway hole side, be placed in hoistway again, then by left and right card leg
It is pulled in structural beams in place, each position and hoistway beam, wall can confirm safety locking, unclamp crane hook after reality；It will put down
Platform protective device integrally slings, left and right card leg deviation structure beam, and can unlock state, can on-demand lifting and translocating.
Integral lifting hoistway steel platform protective device of the present invention based on above-mentioned design, due to closing hoistway protective device
Reason ground be set to mainly by vertical supporting leg, oblique supporting leg supporting surface board group at " right angled triangle " shape integral steel platform,
Other than it can make the horizontal totally-enclosed protection in hoistway hole, the simplicity and agility of promotion are also greatly strengthened, work is improved
Efficiency reduces security risk；Due to taking full advantage of device itself component load in use, it is not required to extraneous support,
Time saving, convenient, safe and reliable effect in promotion and work can be realized, efficiently solve promoted in the prior art difficulty it is big and
There are the deficiencies of security risk, while also effectively reducing the workload and difficulty of high-rise working, facilitate hoistway protection and its
The effective linking to work between his work post, it is advantageously ensured that engineering production efficiency and saving construction cost.Therefore the present invention
Integral lifting hoistway steel platform protective device compared with prior art, hence it is evident that have structure it is simple and scientific and reasonable, promoted
It is safe and reliable and at low cost, be convenient to be used in turn, from overcoming security risk, improve operating efficiency and the significant life wealth of bring
It produces safety and ensures that corporate social economic benefit angle considers, protective device of the present invention is the carrying out production strictly in line with rules and regulations of enterprise, scientific and technological progress
Technical guarantee is provided, thus there is very strong practicability and valuable market application prospect.
Detailed description of the invention
Fig. 1 is the overall basic structure schematic diagram of the embodiment of the present invention；
Fig. 2 is the structural schematic diagram of platform panel and skeleton in the embodiment of the present invention；
Fig. 3 is the structural schematic diagram of vertical legs in the embodiment of the present invention；
Fig. 4 is the structural schematic diagram of oblique supporting leg in the embodiment of the present invention；
Fig. 5 is the structure and installation condition schematic diagram of card leg in left and right in the embodiment of the present invention；
Fig. 6 is the structural schematic diagram of platform otic placode in the embodiment of the present invention；
Fig. 7 is the structural schematic diagram of Platform Lug in the embodiment of the present invention；
Fig. 8 is the working state schematic representation of the embodiment of the present invention.
In figure:
1. outline border is in outline border after 112. before platform panel and the outer skeleton 111. of 11. platform of skeleton
113. left outside frame in-seam item before 12. platform inner frames 121. in 114. right outer frame
The 123. right 13. platform otic placode of in-seam item of left inside bone item 124. of in-seam item after 122.
131. otic placode behind left front 132. left back 134. right side of otic placode of right front ear plate 133. of otic placode
135. the right front lifting lug of 14. Platform Lug of bolt pilot hole E, 141. left front lifting eye 142.
143. right 145. lifting hole(eyelet) of rear lifting lug, the 15. platform panels of left back lifting lug 144.
2. 21. left and right pillar 22. of vertical legs interconnects 23. bolt pilot hole A of cross bar A
24. oblique 31. or so the inclined strut of supporting leg of 25. card leg welding base of bolt pilot hole B 3.
32. interconnecting 33. bolt pilot hole C of cross bar B, 24. bolt pilot hole D, 4. or so card leg
41. the horizontal stay of diagonal brace item 42..
Specific embodiment
The invention will be further described with exemplary embodiments with reference to the accompanying drawing.
In Fig. 1 to Fig. 8, integral lifting hoistway steel platform protective device of the invention, main body include platform panel with
Skeleton 1 and vertical legs 2, are characterized in that: further including oblique supporting leg 3 and left and right card leg 4, hoistway steel platform protective device is integrally in
The right triangular shape being made of platform panel and skeleton 1, vertical legs 2, oblique supporting leg 3 and the assembly interconnection of card leg 4, in which:
The platform panel and skeleton 1 has the function of whole load-bearing and totally-enclosed protection hoistway, includes outer skeleton 11, interior
The peaceful deck plate 15 of skeleton 12, platform otic placode 13, Platform Lug 14；
11 main body of outer skeleton is in interconnect the box shape that is formed by welding by square steel tube end, outline border side 111 before including, after
Outline border is in 112, left outside frame 113 and right outer frame side 114；
12 main body of inner frame is in " well " shape being made of square steel tube cross weld, and fixation is welded on outer 11 frame of skeleton
It is interior, it include preceding in-seam item 121, rear in-seam item 122, left inside bone item 123 and right in-seam item 124；
The platform otic placode 13 by being made equipped with the sheet steel of bolt pilot hole E 135, include it is fixed be welded on it is left inside
Left front otic placode 131 and left back otic placode 133, fixed right front ear plate 132 and the right side being welded on right in-seam item 124 on bone item 123
Otic placode 134 afterwards；
The Platform Lug 14 is made of the sheet steel for being equipped with lifting hole(eyelet) 145, includes that fixation is welded on left inside bone item 123
Left front lifting eye 141 and left back lifting lug 143, the fixed right front lifting lug 142 and right rear lifting lug 144 being welded on right in-seam item 124；
The platform panel 15 is filled the post of by decorative pattern sheet metal, and the spanning platform lifting lug 14 that cracks, fixation are welded on outer 11 and of skeleton
On the upper surface of inner frame 12；
The vertical legs 2 have the function of bearing vertical load, include that left and right pillar 21 and weldering made of channel steel are set
Between left and right pillar 21, several interconnection cross bar A 22 made of square steel tube, set on the upper end slot bottom of left and right pillar 21
It is equipped on the slot bottom convenient for the bolt pilot hole A 23, nearly lower end that are interconnected with left front otic placode 131 and the assembly of 132 bolt of right front ear plate
It is provided with and is convenient for being provided with card leg welding base 25 on the bolt pilot hole B 24 of oblique supporting leg 3 assembly interconnection, cell wall；
The oblique supporting leg 3 has oblique drawknot and bears platform load, forms opposite bearing pressure with overall structure, ensures platform
It is located stable function, includes the left and right inclined strut 31 made of channel steel and is welded between left and right inclined strut 31, by square steel
Several interconnection cross bar Bs 32 made of managing are provided on the nearly upper end slot bottom of left and right inclined strut 31 and are convenient for and left back otic placode
133 and it is right after the bolt pilot hole C 33 of 134 bolt of otic placode assembly interconnection, be provided on nearly lower end slot bottom and to be convenient for and vertical branch
The bolt pilot hole D 34 of 21 lower end of the bolt of the left and right pillar assembly interconnection of leg 2；
The card leg 4 has the function of limiting vertical supports 2 and bears platform entirety vertical load, and main body is in be made of channel steel
Diagonal brace item 41 and horizontal stay 42 constitute angle square shape, fixation be welded on the card leg welding base 25 of left and right pillar 21；
In the assembled condition, the upper end of the vertical legs 2 and oblique supporting leg 3 passes through the dress of the bolt on left and right pillar 21 respectively
Bolt pilot hole C 33 and left front otic placode 131 and right front ear plate 132 and left back otic placode on distribution A 23, left and right inclined strut 31
133 and the right side after the corresponding bolt assembly of otic placode 134, be fixed at the lower section of platform panel and skeleton 1, the lower end of oblique supporting leg 3
By the bolt pilot hole D 34 and the assembly interconnection of 24 bolt of bolt pilot hole B, form right angle triangle matrix is described
Platform Lug 14 it is fixed respectively be welded on the anteroposterior position of left inside bone item 123 and right in-seam item 124, in overhanging shape, constitute by
21 vertical support of left and right pillar, the platform panel as described in 31 inclined shore of left and right inclined strut and skeleton 1 and by card leg 4 by holding
It is covered on hoistway and can arbitrarily be hung down by Platform Lug 14 by loop wheel machine in place, by platform panel and skeleton 1 in structural beams
Hang the right triangular shape integral lifting hoistway steel platform protective device of displacement.
As long as reliably being interconnected in use, Platform Lug 14 is passed through lifting hole(eyelet) 145 with the suspension hook on tower crane steel wire cable, even if
Terrace prevention device can integrally be sling, vertical legs 2 is made to be close to hoistway hole side, be placed in hoistway again, it then will be left
Right card leg 4 is pulled in structural beams in place, and each position and hoistway beam, wall can confirm safety locking after reality, is unclamped tower crane and is hung
Hook；Terrace prevention device is integrally sling, can unlock state after 4 deviation structure beam of left and right card leg, just can rise on demand
Drop displacement.
Claims (1)
1. a kind of integral lifting hoistway steel platform protective device, main body includes platform panel and skeleton (1) and vertical legs
(2), it is characterised in that: further include oblique supporting leg (3) and left and right card leg (4), hoistway steel platform protective device is integrally in by platform
The right triangular shape that panel and skeleton (1), vertical legs (2), oblique supporting leg (3) and card leg (4) assembly interconnection are constituted,
In:
The platform panel and skeleton (1) have the function of whole load-bearing and totally-enclosed protection hoistway, include outer skeleton
(11), the peaceful deck plate (15) of inner frame (12), platform otic placode (13), Platform Lug (14)；
Outer skeleton (11) main body is in interconnect the box shape being formed by welding by square steel tube end, outline border side before including
(111), rear outline border (113) and right outer frame side (114) at (112), left outside frame；
Inner frame (12) main body is in " well " shape being made of square steel tube cross weld, and fixation is welded on outer skeleton (11)
It include preceding in-seam item (121), rear in-seam item (122), left inside bone item (123) and right in-seam item (124) in frame；
The platform otic placode (13) is made of the sheet steel equipped with bolt pilot hole E(135), includes that fixation is welded on a left side
Left front otic placode (131) and left back otic placode (133), the fixed right vestibule being welded on right in-seam item (124) on in-seam item (123)
Plate (132) He Youhou otic placode (134)；
The Platform Lug (14) is made of the sheet steel for being equipped with lifting hole(eyelet) (145), includes that fixation is welded on left inside bone item
(123) left front lifting eye (141) and left back lifting lug (143), the fixed right front lifting lug being welded on right in-seam item (124) on
(142) and right rear lifting lug (144)；
The platform panel (15) is filled the post of by decorative pattern sheet metal, and the spanning platform lifting lug (14) that cracks, fixation are welded on outer skeleton
(11) and on the upper surface of inner frame (12)；
The vertical legs (2) have the function of bear vertical load, include the left and right pillar made of channel steel (21) and
It is welded between left and right pillar (21), several interconnection cross bar A(22 made of square steel tube), in the upper end of left and right pillar (21)
It is provided on slot bottom convenient for the bolt pilot hole A(23 with left front otic placode (131) and the assembly interconnection of right front ear plate (132) bolt),
Be provided on the slot bottom of nearly lower end convenient for the bolt pilot hole B(24 with oblique supporting leg (3) assembly interconnection), be provided with card on cell wall
Leg welding base (25)；
The oblique supporting leg (3) has oblique drawknot and bears platform load, forms opposite bearing pressure with overall structure, ensures to put down
Platform is located stable function, include the left and right inclined strut made of channel steel (31) and be welded between left and right inclined strut (31),
Several interconnection cross bar Bs (32) made of square steel tube, be provided on the nearly upper end slot bottom of left and right inclined strut (31) convenient for
It is arranged on the bolt pilot hole C (33) of left back otic placode (133) He Youhou otic placode (134) bolt assembly interconnection, nearly lower end slot bottom
Have convenient for the bolt pilot hole D(34 with the assembly interconnection of left and right pillar (21) lower end of the bolt of vertical legs (2))；
The card leg (4) has the function of limiting vertical supports (2) and bears platform entirety vertical load, and main body is in by channel steel
The angle square shape that manufactured diagonal brace item (41) and horizontal stay (42) are constituted, the fixed card leg welding base for being welded on left and right pillar (21)
(25) on；
In the assembled condition, the upper end of the vertical legs (2) and oblique supporting leg (3) passes through respectively on left and right pillar (21)
Bolt pilot hole A(23), the bolt pilot hole C(33 on left and right inclined strut (31)) and left front otic placode (131) and right front ear plate
(132) and the corresponding bolt assembly of left back otic placode (133) He Youhou otic placode (134), platform panel and skeleton (1) are fixed at
The lower end of lower section, oblique supporting leg (3) passes through the bolt pilot hole D(3) 4 and bolt pilot hole B(24) bolt assembly is mutually
Even, form right angle triangle matrix, fixation is welded on left inside bone item (123) and right in-seam item to the Platform Lug (14) respectively
(124) on anteroposterior position, be in overhanging shape, constitute by left and right pillar (21) vertical support, by left and right inclined strut (31) inclined shore
The platform panel and skeleton (1) and by card leg (4) by hold in structural beams it is in place, covered by platform panel and skeleton (1)
And it can be by Platform Lug (14) by the right triangular shape integral lifting hoistway of the random hanging displacement of loop wheel machine on hoistway
Steel platform protective device；
As long as reliably being interconnected in use, Platform Lug (14) are passed through lifting hole(eyelet) (145) with the suspension hook on tower crane steel wire cable, even if
Terrace prevention device can integrally be sling, vertical legs (2) is made to be close to hoistway hole side, be placed in hoistway again, then will
Left and right card leg (4) is pulled in structural beams in place, and each position and hoistway beam, wall, can safety lockings after reality；By Terrace prevention
Device is integrally sling, can unlock after left and right card leg (4) deviation structure beam, can on-demand lifting and translocating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910347823.4A CN109930852A (en) | 2019-04-28 | 2019-04-28 | A kind of integral lifting hoistway steel platform protective device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910347823.4A CN109930852A (en) | 2019-04-28 | 2019-04-28 | A kind of integral lifting hoistway steel platform protective device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109930852A true CN109930852A (en) | 2019-06-25 |
Family
ID=66991239
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910347823.4A Pending CN109930852A (en) | 2019-04-28 | 2019-04-28 | A kind of integral lifting hoistway steel platform protective device |
Country Status (1)
| Country | Link |
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| CN (1) | CN109930852A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202401738U (en) * | 2011-12-09 | 2012-08-29 | 中建四局第六建筑工程有限公司 | Operating platform for supporting assembled elevator shaft shear wall framework |
| CN203022327U (en) * | 2012-12-14 | 2013-06-26 | 中铁建设集团有限公司 | Elevator shaft high-altitude construction platform device |
| CN204112692U (en) * | 2014-09-24 | 2015-01-21 | 中建一局集团建设发展有限公司 | Simple and easy lift-type wellbore operations platform |
| CN205206284U (en) * | 2015-12-10 | 2016-05-04 | 中国建筑一局(集团)有限公司 | Detachable assembly type elevator shaft operating platform |
| CN209874526U (en) * | 2019-04-28 | 2019-12-31 | 中铁建工集团有限公司 | Integral lifting type hoistway steel platform protection device |
-
2019
- 2019-04-28 CN CN201910347823.4A patent/CN109930852A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202401738U (en) * | 2011-12-09 | 2012-08-29 | 中建四局第六建筑工程有限公司 | Operating platform for supporting assembled elevator shaft shear wall framework |
| CN203022327U (en) * | 2012-12-14 | 2013-06-26 | 中铁建设集团有限公司 | Elevator shaft high-altitude construction platform device |
| CN204112692U (en) * | 2014-09-24 | 2015-01-21 | 中建一局集团建设发展有限公司 | Simple and easy lift-type wellbore operations platform |
| CN205206284U (en) * | 2015-12-10 | 2016-05-04 | 中国建筑一局(集团)有限公司 | Detachable assembly type elevator shaft operating platform |
| CN209874526U (en) * | 2019-04-28 | 2019-12-31 | 中铁建工集团有限公司 | Integral lifting type hoistway steel platform protection device |
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Application publication date: 20190625 |