CN205857673U - Scaffold fall-preventing protection device - Google Patents
Scaffold fall-preventing protection device Download PDFInfo
- Publication number
- CN205857673U CN205857673U CN201620843114.7U CN201620843114U CN205857673U CN 205857673 U CN205857673 U CN 205857673U CN 201620843114 U CN201620843114 U CN 201620843114U CN 205857673 U CN205857673 U CN 205857673U
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- stopper
- page
- catch
- bracing frame
- fall
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Abstract
This utility model relates to a kind of scaffold fall-preventing protection device, and including fixed supporting seat and the fall arrestor assemblies that is arranged on fixed supporting seat, fall arrestor assemblies rises operating mode at scaffold and declines operating mode and all can play and prevent scaffold support body from falling.Described fall arrestor assemblies includes: stopper and page four wheels；Stopper includes: the bracing frame that cross section is U-shaped, and the opening of U-shaped bracing frame is in lower section；Stopper fixed plate and stopper baffle plate it is provided with in the groove of U-shaped bracing frame；Stopper fixed plate is arranged on inside the rear end face of U-shaped bracing frame；Stopper baffle plate is arranged on inside the front end face of U-shaped bracing frame；It is provided with connecting hole in the middle part of stopper fixed plate；Fixing axle is set in described connecting hole；It is provided with back-moving spring in the middle part of fixing axle.This utility model scaffold fall-preventing protection device, improves climbing frame utilization rate in actual applications, gives full play to outrigger safeguard function, it is to avoid accidentalia and the natural cause adverse effect to climbing frame work high above the ground.
Description
Technical field
This utility model relates to one and builds work constructing device, specifically, relates to a kind of scaffold fall-preventing protection device.
Background technology
At present, the commonly used anti-fall device of attached lifting scaffold is single direction, only permits a climbing frame and rises inaccurate
Permitted climbing frame to decline and therefore affected climbing frame by traditional anti-fall mode and can only can not participate in the exterior wall finishing of building body and drop by high-altitude dismantling
Low utilization rate and to there is high-altitude dismantling dangerous.Tradition catching device is exposed to be easy to outside be affected by external condition thus makes
Anti-fall malfunction is become to easily cause potential safety hazard.Tradition catching device stopper all by self gravitation realize anti-fall effect accidental because of
Element is highly susceptible to the most greatly the impact of external factor and causes potential safety hazard.
Utility model content
For above-mentioned deficiency of the prior art, this utility model provides a kind of simple in construction, extends the anti-fall guarantor of scaffold
In the service life of protection unit, reduce the scaffold fall-preventing protection device of noise simultaneously.
Technical solution adopted in the utility model is:
A kind of scaffold fall-preventing protection device, it is characterised in that: include fixed supporting seat and be arranged on fixed supporting seat
On fall arrestor assemblies, fall arrestor assemblies rises operating mode at scaffold and declines operating mode and all can play and prevent scaffold support body from falling
Fall.
Described fall arrestor assemblies includes: stopper and page four wheels；
Stopper includes: the bracing frame that cross section is U-shaped, and the opening of U-shaped bracing frame is in lower section；
Stopper fixed plate and stopper baffle plate it is provided with in the groove of U-shaped bracing frame；
Stopper fixed plate is arranged on inside the rear end face of U-shaped bracing frame；
Stopper baffle plate is arranged on inside the front end face of U-shaped bracing frame；
It is provided with connecting hole in the middle part of stopper fixed plate；
Fixing axle is set in described connecting hole；
It is provided with back-moving spring in the middle part of fixing axle；
The rear end of fixing axle is connected with fixed supporting seat；
The outer surface of described U-shaped bracing frame is provided with guiding box body；
Described guiding box body cross section is rectangular, in the middle part of base, length method is provided with rectangular through-hole；
The sidewall guiding box body contacts with the both sides outer wall of U-shaped bracing frame；
U-shaped bracing frame slide anteroposterior in orientating box body under external force；
Page four wheels it are provided with below the middle part of U-shaped bracing frame；
Page four wheels include the stop sleeve being arranged on middle part；
The outer surface of stop sleeve is provided with page four wheel catch；
The root of page four wheel catch is connected with stop sleeve surface；
Page four wheel catch are cross setting at circumferencial direction；Page four wheel catch rear end surfaces are symmetrically set with left side
Catch rectangular preiection and right side catch rectangular preiection；
Described left side catch rectangular preiection and right side catch rectangular preiection are arranged along page four length directions taking turns catch；
Support shaft it is provided with in stop sleeve；
Described support shaft is connected with fixed supporting seat；
Stopper baffle plate is that rectangular slab is perpendicular with stopper inwall；
It is provided with buffered tower rectangular through-hole in the middle part of described stopper baffle plate；
Described page four wheel catch tops are arranged in the U-shaped bracing frame of stopper；
Described page four wheel catch tops are arranged between stopper fixed plate and stopper baffle plate；
Described buffered tower rectangular through-hole width is more than page four wheel catch width；
Page four wheel catch width are more than described gear with left side catch rectangular preiection and right side catch rectangular preiection width sum
Plate device rectangular through-hole width；
Fixed supporting seat includes that Left-side support seat is connected with Right side support seat and with Left-side support seat and Right side support seat
The fixing seat connect；
Left-side support seat and Right side support seat include that vertical beam, described vertical beam are connected with body of wall by fixing bolt respectively
Connecing, the upper end of described vertical beam is provided with horizontal beam, and the rear end of horizontal beam is connected with vertical beam；The bottom of described vertical beam and
Horizontal beam front end is connected by support beam, and the front end of described horizontal beam connects fixing seat, and described fixing seat cross section is U
Type, the sidewall of U-shaped fixing seat is in being horizontally disposed with, and the opening of U-shaped fixing seat is connected with horizontal beam；
U-shaped fixing seat outer surface is provided with left support arm and Right side support arm；
The inner surface of left support arm and Right side support arm is respectively arranged with directive wheel；
Directive wheel includes left side directive wheel and right hand guide wheels；
Described left directive wheel is provided with the central shaft in left side, and the central shaft in described left side is in being horizontally disposed with；
The central shaft in described left side is connected with left support arm；
Described right directive wheel is provided with the central shaft on right side, and the central shaft on described right side is in being horizontally disposed with；
The central shaft on described right side is connected with Right side support arm；
Left rail and right rail it is respectively arranged with between left support arm and Right side support arm；
Left rail is connected by connecting rod with right rail；
The cross section of left rail and right rail is U-shaped；
The opening of left rail is in left side；
The opening of right rail is on right side；
The sidewall of described left rail and right rail contacts with directive wheel respectively.
The front end of fixing axle is provided with location division, and the diameter of described fixing axle is less than connecting hole diameter；Location division diameter is big
In connecting hole diameter.
Described page four wheel catch are 4；The angle of adjacent page four wheel catch is 90 degree.
Described fall arrestor assemblies is provided above sealing baffle.
The beneficial effect of this utility model hinge structure:
This utility model scaffold fall-preventing protection device, improves climbing frame utilization rate in actual applications, outside giving full play to
Frame safeguard function, it is to avoid accidentalia and the natural cause adverse effect to climbing frame work high above the ground.
This utility model adds decline anti-drop function while inheriting tradition catching device function, it is allowed to climbing frame is normal
Declining operating mode, integral sealing design avoids extraneous factor impact, and mechanical linkage design makes its anti-drop function more actively avoid
The generation of accidentalia.
Accompanying drawing explanation
Fig. 1 is the structural representation of the first stage of the lifting track operating mode of this utility model scaffold fall-preventing protection device
Figure；
Fig. 2 is the structural representation of the second stage of the lifting track operating mode of this utility model scaffold fall-preventing protection device
Figure；
Fig. 3 is the structural representation of the phase III of the lifting track operating mode of this utility model scaffold fall-preventing protection device
Figure；
Fig. 4 is the structural representation of the first stage of the track decline operating mode of this utility model scaffold fall-preventing protection device
Figure；
Fig. 5 is the structural representation of the second stage of the track decline operating mode of this utility model scaffold fall-preventing protection device
Figure；
Fig. 6 is the structural representation of the phase III of the track decline operating mode of this utility model scaffold fall-preventing protection device
Figure；
Fig. 7 is the schematic diagram of this utility model scaffold fall-preventing protection device；
Fig. 8 is the structural representation of the fixed supporting seat of this utility model scaffold fall-preventing protection device.
Fig. 9 is the perspective view of page four wheels of this utility model scaffold fall-preventing protection device；
Figure 10 is the perspective view of the bracing frame of this utility model scaffold fall-preventing protection device；
Figure 11 is the main TV structure schematic diagram guiding box body of this utility model scaffold fall-preventing protection device；
Figure 12 is the side-looking structural representation guiding box body of this utility model scaffold fall-preventing protection device.
Critical piece symbol description in accompanying drawing:
In figure:
1, stopper page 2, four wheel
11, bracing frame 12, stopper fixed plate
13, stopper baffle plate 14, fixing axle
15, back-moving spring 16, guiding box body
17, buffered tower rectangular through-hole 18, location division
21, stop sleeve page 22, four wheel catch
23, left side catch rectangular preiection 24, right side catch rectangular preiection
25, support shaft
3, fixed supporting seat
31, Left-side support seat 32, Right side support seat
33, fixing seat.
Detailed description of the invention
Referring to the drawings and this utility model is described in detail by embodiment:
Accompanying drawing 1-12 understands, a kind of scaffold fall-preventing protection device, including fixed supporting seat 3 and be arranged on fixing support
Fall arrestor assemblies on seat, fall arrestor assemblies all can play prevent scaffold support body from falling in scaffold rising operating mode and decline operating mode
Fall.
Described fall arrestor assemblies includes: stopper 1 and page four wheels 2；
Stopper includes: the bracing frame 11 that cross section is U-shaped, and the opening of U-shaped bracing frame 11 is in lower section；
Stopper fixed plate 12 and stopper baffle plate 13 it is provided with in the groove of U-shaped bracing frame 11；
Stopper fixed plate 12 is arranged on inside the rear end face of U-shaped bracing frame 11；
Stopper baffle plate 13 is arranged on inside the front end face of U-shaped bracing frame；
It is provided with connecting hole in the middle part of stopper fixed plate 12；
Fixing axle 14 is set in described connecting hole；
It is provided with back-moving spring 15 in the middle part of fixing axle；
The rear end of fixing axle 14 is connected with fixed supporting seat 3；
The outer surface of described U-shaped bracing frame is provided with guiding box body 16；
Described guiding box body 16 cross section is rectangular, in the middle part of base, length method is provided with rectangular through-hole；
The sidewall guiding box body 16 contacts with the both sides outer wall of U-shaped bracing frame 11；
U-shaped bracing frame 11 slide anteroposterior in guiding box body 16 under external force；
Page four wheels 2 it are provided with below the middle part of U-shaped bracing frame 11；
Page four wheels include the stop sleeve 21 being arranged on middle part；
The outer surface of stop sleeve 21 is provided with page four wheel catch 22；
The root of page four wheel catch 22 is connected with stop sleeve 21 surface；
Page four wheel catch 22 are cross setting at circumferencial direction；Page four wheel catch 22 rear end surfaces are symmetrically set with
Left side catch rectangular preiection 23 and right side catch rectangular preiection 24；
Described left side catch rectangular preiection 23 and right side catch rectangular preiection 24 are arranged along page four length directions taking turns catch；
Left side catch rectangular preiection 23 and right side catch rectangular preiection 24 are arranged along page four wheel radial directions；
Support shaft 25 it is provided with in stop sleeve 21；
Described support shaft 25 is connected with fixed supporting seat 3；
Stopper baffle plate 13 is that rectangular slab is perpendicular with stopper inwall；
It is provided with buffered tower rectangular through-hole 17 in the middle part of described stopper baffle plate 13；
Described page four wheel catch 22 tops are arranged in the U-shaped bracing frame 11 of stopper；
Described page four wheel catch 22 tops are arranged between stopper fixed plate 12 and stopper baffle plate 13；
Described buffered tower rectangular through-hole 17 width is more than page four wheel catch width；
Page four wheel catch 22 width are more than with left side catch rectangular preiection 23 and right side catch rectangular preiection 24 width sum
Described buffered tower rectangular through-hole 17 width；
Fixed supporting seat 3 include Left-side support seat 31 and Right side support seat 32 and with Left-side support seat 31 and Right side support
The fixing seat 33 that seat 32 is connected；
Left-side support seat 31 and Right side support seat 32 include vertical beam 311 respectively, and described vertical beam 311 is by fixing bolt
312 are connected with body of wall 313, and the upper end of described vertical beam 311 is provided with horizontal beam 314, the rear end of horizontal beam 314 and vertical beam
311 are connected；The bottom of described vertical beam 311 is connected by support beam 315 with horizontal beam 314 front end, described horizontal beam 314
Front end connect have fixing seat 33, described fixing seat 33 cross section is U-shaped, and the sidewall of U-shaped fixing seat is in being horizontally disposed with, U-shaped solid
The opening of reservation is connected with horizontal beam 314；
U-shaped fixing seat outer surface is provided with left support arm and Right side support arm 316；
The inner surface of left support arm and Right side support arm 316 is respectively arranged with directive wheel 317；
Directive wheel includes left side directive wheel and right hand guide wheels；
Described left directive wheel is provided with the central shaft 318 in left side, and the central shaft in described left side is in being horizontally disposed with；
The central shaft in described left side is connected with left support arm 315；
Described right directive wheel is provided with the central shaft on right side, and the central shaft on described right side is in being horizontally disposed with；
The central shaft on described right side is connected with Right side support arm 316；
Left rail and right rail 319 it is respectively arranged with between left support arm and Right side support arm；
Left rail is connected by connecting rod 320 with right rail 319；
The cross section of left rail and right rail is U-shaped；
The opening of left rail is in left side；
The opening of right rail is on right side；
The sidewall of described left rail and right rail contacts with directive wheel respectively.
The front end of fixing axle is provided with location division 18, and the diameter of described fixing axle is less than connecting hole diameter；Location division diameter
More than connecting hole diameter.
Described page four wheel catch are 4；The angle of adjacent page four wheel catch is 90 degree.
Described fall arrestor assemblies is provided above sealing baffle.Sealing baffle uses 4mm steel plate to be covered on catching device
Portion, can be prevented effectively from catching device and concrete and disintegrating slag etc. can be avoided to enter anti-fall device internal influence catching device by clashing into simultaneously
Motility.
Anti-dumping arm includes left support arm and Right side support arm: use angle steel and pulley to be welded, by bolt and weldering
Connect and be fixed on A-frame, can hold tightly in pulley embedded groove steel track track make track can only move up and down formed stable anti-
Topple sliding sleeve system.
Fixing axle is positioned on rear side of stopper, and front end and stopper fixed plate are attached across inner side spring then across anti-fall box
Sub-cover board hole is then passed through outer lateral spring, and end installs nut makes it be close to outer lateral spring, thus formation is multiple before and after can making stopper
The Force transmission parts of position.
Back-moving spring is between stopper rear portion and box baffle plate and anti-fall box baffle plate rear portion and fixing shaft end spiral shell
Between mother, it is interspersed on fixing axle and provides sufficient power for motion before and after stopper.
Stopper baffle plate is positioned at stopper inner front side and is structure as a whole with stopper, for producing machinery connection with page four wheels
It is dynamic so that the active force that stopper produces forward or backward makes stopper seesaw.
Orientating box body is positioned at below sealing baffle between A-frame, and lower surface is open and clear makes four to use square steel tube to be made
Page wheel can rotate to cassette interior and contacts with stopper and provide good support and activity space for stopper.
Page four wheels are positioned at immediately below stopper and anti-fall box for transmitting track direction of motion signal and being stopper
Power is provided.
Page four wheel catch are positioned on page four impeller blades and are structure as a whole with page four wheels, for pushing away when page four wheels rotate
Dynamic stopper makes page four wheels and stopper form the main Force transmission parts that mechanical linkage system is page four wheels.
Track up and down motion drives page four wheels to rotate, is more repeatedly moved, when track is dashed forward by before and after page four wheel drive stoppers
When so gliding, stopper can not rebound thus jam forces track to stop gliding motion below track connecting tube in time.
During catching device rises in orbit, page four wheels rotate counterclockwise, thus drive stopper backward (away from track)
Motion, after track rises 30mm, page four wheel catch depart from stopper catch, and stopper sets back under the action of the spring.As
This repeatedly moves and does not hinder the normal ascending motion of track.
This utility model solves its technical problem and be the technical scheme is that the most all permission track is upwards
Motion, but when track moves downward, it is divided into two kinds of situations: the first situation is uniform motion, the rail when track downward uniform motion
Road connecting rod makes stopper stretch out to track interior by page four wheels, and track connecting rod drives page four wheels to decline stopper after 40mm
Rebound the most rapidly and form a circulation, do not affected by catching device at this cyclic process middle orbit uniform descent.
The second situation is the movement of falling object, and when track becomes downwards the movement of falling object, stopper is equally under the drive of page four wheels
Stretch out to track interior but due to track glide as the movement of falling object thus stopper go deep into after track can not return in time
Hinder track to continue to glide thus reach anti-fall purpose
Catching device is during track declines, and page four wheels rotate clockwise, thus drive stopper (injection) forward
Motion, after track declines 40mm, page four wheel catch depart from stopper catch, and stopper sets back under the action of the spring.As
This repeatedly moves and does not hinder track normal decline to move.
Two kinds of situations it are divided into: the first situation is uniform motion, when track downward uniform motion when track moves downward
Track connecting rod makes stopper stretch out to track interior by page four wheels, and track connecting rod drives page four wheels to stop after declining 40mm
Device rebounds the most rapidly and forms a circulation, at this cyclic process middle orbit uniform descent not by catching device shadow
Ring.
The second situation is the movement of falling object, and when track becomes downwards the movement of falling object, stopper is equally at page four wheels
Drive under to track interior stretch out but due to track glide for the movement of falling object thus stopper go deep into track after can not
Return hinders track to continue to glide thus reaches anti-fall purpose in time.
Decline operating mode: track downward uniform motion track connecting rod drives page four wheels to rotate clockwise so that page four catch
Pressed home spring while that sheet promoting stopper catch to make stopper travel forward, when track drops to state shown in accompanying drawing 11
Page four wheel catch no longer promote stopper catch so that stopper return under the effect of back-moving spring, under track continues at the uniform velocity
It is down to during state shown in accompanying drawing 12 enter next one circulation.
Fall situation: track occur suddenly movement of falling object track connecting rod to drive page four wheels to turn clockwise so that
Pressed home spring while that page four wheel catch promoting stopper catch to make stopper travel forward, owing to track is in freely falling body
Kinestate declines with the state of acceleration so when back-moving spring does not makes stopper reset, track connecting rod has been pressed against resistance
The upper surface of lug-latch, under the influence of huge load, stopper cannot reset thus reach anti-fall purpose.
Claims (5)
1. a scaffold fall-preventing protection device, it is characterised in that: include fixed supporting seat and be arranged on fixed supporting seat
Fall arrestor assemblies, fall arrestor assemblies rises operating mode at scaffold and declines operating mode and all can play and prevent scaffold support body from falling.
Scaffold fall-preventing protection device the most according to claim 1, it is characterised in that:
Described fall arrestor assemblies includes: stopper and page four wheels；
Stopper includes: the bracing frame that cross section is U-shaped, and the opening of U-shaped bracing frame is in lower section；
Stopper fixed plate and stopper baffle plate it is provided with in the groove of U-shaped bracing frame；
Stopper fixed plate is arranged on inside the rear end face of U-shaped bracing frame；
Stopper baffle plate is arranged on inside the front end face of U-shaped bracing frame；
It is provided with connecting hole in the middle part of stopper fixed plate；
Fixing axle is set in described connecting hole；
It is provided with back-moving spring in the middle part of fixing axle；
The rear end of fixing axle is connected with fixed supporting seat；
The outer surface of described U-shaped bracing frame is provided with guiding box body；
Described guiding box body cross section is rectangular, in the middle part of base, length method is provided with rectangular through-hole；
The sidewall guiding box body contacts with the both sides outer wall of U-shaped bracing frame；
U-shaped bracing frame slide anteroposterior in orientating box body under external force；
Page four wheels it are provided with below the middle part of U-shaped bracing frame；
Page four wheels include the stop sleeve being arranged on middle part；
The outer surface of stop sleeve is provided with page four wheel catch；
The root of page four wheel catch is connected with stop sleeve surface；
Page four wheel catch are cross setting at circumferencial direction；Page four wheel catch rear end surfaces are symmetrically set with left side catch
Rectangular preiection and right side catch rectangular preiection；
Described left side catch rectangular preiection and right side catch rectangular preiection are arranged along page four length directions taking turns catch；
Support shaft it is provided with in stop sleeve；
Described support shaft is connected with fixed supporting seat；
Stopper baffle plate is that rectangular slab is perpendicular with stopper inwall；
It is provided with buffered tower rectangular through-hole in the middle part of described stopper baffle plate；
Described page four wheel catch tops are arranged in the U-shaped bracing frame of stopper；
Described page four wheel catch tops are arranged between stopper fixed plate and stopper baffle plate；
Described buffered tower rectangular through-hole width is more than page four wheel catch width；
Page four wheel catch width are more than described buffered tower with left side catch rectangular preiection and right side catch rectangular preiection width sum
Rectangular through-hole width；
Fixed supporting seat includes Left-side support seat and Right side support seat and is connected with Left-side support seat and Right side support seat
Fixing seat；
Left-side support seat and Right side support seat include that vertical beam, described vertical beam are connected with body of wall by fixing bolt respectively,
The upper end of described vertical beam is provided with horizontal beam, and the rear end of horizontal beam is connected with vertical beam；The bottom of described vertical beam and water
Flat-topped ridge front end is connected by support beam, and the front end of described horizontal beam connects fixing seat, and described fixing seat cross section is U-shaped, U
Type fixes the sidewall of seat in being horizontally disposed with, and the opening of U-shaped fixing seat is connected with horizontal beam；
U-shaped fixing seat outer surface is provided with left support arm and Right side support arm；
The inner surface of left support arm and Right side support arm is respectively arranged with directive wheel；
Directive wheel includes left side directive wheel and right hand guide wheels；
Described left directive wheel is provided with the central shaft in left side, and the central shaft in described left side is in being horizontally disposed with；
The central shaft in described left side is connected with left support arm；
Described right directive wheel is provided with the central shaft on right side, and the central shaft on described right side is in being horizontally disposed with；
The central shaft on described right side is connected with Right side support arm；
Left rail and right rail it is respectively arranged with between left support arm and Right side support arm；
Left rail is connected by connecting rod with right rail；
The cross section of left rail and right rail is U-shaped；
The opening of left rail is in left side；
The opening of right rail is on right side；
The sidewall of described left rail and right rail contacts with directive wheel respectively.
Scaffold fall-preventing protection device the most according to claim 1, it is characterised in that: the front end of fixing axle is provided with location
Portion, the diameter of described fixing axle is less than connecting hole diameter；Location division diameter is more than connecting hole diameter.
Scaffold fall-preventing protection device the most according to claim 1, it is characterised in that: described page four wheel catch are 4；Adjacent
The angle of page four wheel catch is 90 degree.
Scaffold fall-preventing protection device the most according to claim 1, it is characterised in that: described fall arrestor assemblies is provided above
Sealing baffle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620843114.7U CN205857673U (en) | 2016-08-05 | 2016-08-05 | Scaffold fall-preventing protection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620843114.7U CN205857673U (en) | 2016-08-05 | 2016-08-05 | Scaffold fall-preventing protection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205857673U true CN205857673U (en) | 2017-01-04 |
Family
ID=57656732
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620843114.7U Active CN205857673U (en) | 2016-08-05 | 2016-08-05 | Scaffold fall-preventing protection device |
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| CN (1) | CN205857673U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106088567A (en) * | 2016-08-05 | 2016-11-09 | 中国二十二冶集团有限公司 | Scaffold fall-preventing protection device |
-
2016
- 2016-08-05 CN CN201620843114.7U patent/CN205857673U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106088567A (en) * | 2016-08-05 | 2016-11-09 | 中国二十二冶集团有限公司 | Scaffold fall-preventing protection device |
| CN106088567B (en) * | 2016-08-05 | 2018-12-11 | 中国二十二冶集团有限公司 | Scaffold fall-preventing protection device |
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| GR01 | Patent grant |