CN101205761B - Lifting gear for highrise operation platform - Google Patents
Lifting gear for highrise operation platform Download PDFInfo
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- CN101205761B CN101205761B CN2006101052206A CN200610105220A CN101205761B CN 101205761 B CN101205761 B CN 101205761B CN 2006101052206 A CN2006101052206 A CN 2006101052206A CN 200610105220 A CN200610105220 A CN 200610105220A CN 101205761 B CN101205761 B CN 101205761B
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- coupler body
- hook
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- cam disc
- auxiliary hook
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Abstract
The invention provides an elevating gear for the high-altitude working platform, consisting of a main elevating gear (1) and an auxiliary elevating gear (2), wherein, both the main elevating gear (1) and the auxiliary elevating gear (2) comprise a main hook mechanism (4) and an auxiliary mechanism (5), one side of a hook body (6) is a bevel edge, a limit block (9) and a circular cam (7) are arranged on the hook body; a tension rod of a main hook body (8) is nest jointed and movably matched with a regulation clip (10) and a cylinder rod of a hydraulic cylinder, the circular cam (7) is provided with a lockhole for inserting a lockpin (15), the circular cam (7) and the hook body (6) are locked in a relative rotation way; contrarily, the circular cam (7) falls naturally under the action of deadweight and respectively realizes the displacement of the whole hook body mechanism by combining the upper part of the hook body (6). The invention overcomes the shortcomings of the prior art of complicated lifting device, uneasy manipulation, limited functions of use and a large number of attachment. The invention has the characteristics of high reliability, easy manipulation and low cost.
Description
(1) technical field
The present invention relates to a kind of lifting gear that is used for aerial work platform.
(2) background technology
In the aerial work platform that climbs certainly, mainly adopt guide rail guide bracket formula hydraulic pressure climbing device at present.This matching requirements operating platform before climbing, pre-buried good sleeve pipe on the construction wall in construction at first, treat that concrete reaches certain intensity (being generally 10Mpa) after, through-wall bolt is installed and is climbed and use attachment device.When climbing, finish in two steps, the H type guide rail that climbs of operation earlier, after the operating platform that climbs.By existing climbing device is analyzed, be not difficult to find the problem and the defective of its existence:
(1) the climb principle and the process complexity of climbing cause the entire equipment complicated operation that climbs.
(2) existing climbing device only is beneficial to the climbing of rising of platform device, promptly is applicable to building structure main body construction situation, and is unfavorable for the equipment step-down operation that it is corresponding to building structure exterior decoration operating mode.Thereby restrict or limited the function of use of main equipment greatly, when building structure being carried out the exterior decoration construction, can only adopt basket method, but the hanging basket less stable, wind-engaging carries does the time spent, has bigger swing, the control difficulty.
(3) climbing device require annex---the quantity of attachment device is more, for every layer of 900-1000 square metre structure, need to install 30-40 attachment device, installation accuracy requirement height as generally.
(3) summary of the invention
For overcome the climbing equipment complexity that exists in the prior art, not easy to operate, function of use is restricted and a fairly large number of deficiency of attachment device, the present invention proposes a kind of lifting gear.
The present invention includes main hoist and secondary elevating mechanism, wherein main hoist comprises main hook, auxiliary hook, hydraulic system; Secondary elevating mechanism comprises main hook and auxiliary hook.Main hoist is with in secondary elevating mechanism is installed on two different platform frameworks of same platform respectively, and interconnects by hydraulic tube, to realize the synchronous working of major and minor elevating mechanism.
Main hook of the present invention comprises coupler body, cam disc, main hook coupler body pull bar, limited block, U type adjustment card, bearing pin, hydraulic cylinder, lock pin, lock pin ring.Coupler body is a platy structure, and the base of coupler body is connected with main hook coupler body pull bar, and a side is a hypotenuse, the angle of its inclined-plane and horizontal plane is 55 degree, be used for when coupler body rises realizing the displacement of coupler body mechanism, and the lower end of this hypotenuse there is the projection on an extend through base, formed hook.Limited block and cam disc cooperate with coupler body by the internal thread hole that is positioned at the coupler body middle part respectively.One end of main hook coupler body pull bar is the auricle of a pair of band connecting hole; U type adjustment card is made up of handle and a pair of clamp, and the spacing between two clamps should satisfy the needs that main hook coupler body pull bar auricle is installed; All there is connecting hole at clamp middle part, and the connecting hole internal diameter on the piston rod of connecting hole on this connecting hole and the auricle and hydraulic cylinder is identical.From inside to outside the connecting hole on piston rod, main hook coupler body pull bar auricle and the U type adjustment card of hydraulic cylinder is linked together by bearing pin successively, and make movable cooperation the between the three.Cam disc is the large semicircle disk of an off-centre, on the circular arc limit of cam disc a lockhole is arranged; To make its straight flange and horizontal angle be 45 when spending when cam disc rotates up, on a side external surface of the main hook coupler body pull bar of lockhole opposite position on the cam disc, horizontal fixed has annular lock pin ring, lock pin places in the lock pin ring, be movable the cooperation between the two, and the axis of this lock pin ring is vertical mutually with the card of cam disc, when the lockhole on the cam disc and lock pin ring are in same horizontal level, one end of lock pin is inserted in the cam disc lockhole, can be with the locking that relatively rotates of cam disc and coupler body; When decontroling lock pin, cam disc is sagging naturally under the deadweight effect, the displacement of whole coupler body mechanism in the time of can realizing coupler body decline.
Hydraulic cylinder is as the element of stretching, contract of main hook, and its outer shell is connected with hydraulic cylinder base by bearing pin, and hydraulic cylinder base then is fixedly installed in the platform framework bottom surface.
Auxiliary hook of the present invention comprises coupler body, cam disc, limited block, bearing pin, auxiliary hook coupler body pull bar, lock pin, lock pin ring and auxiliary hook return spring, auxiliary hook return bar.Wherein the structure of coupler body, cam disc, lock pin, lock pin ring, limited block and mutual connected mode are identical with main hook.Auxiliary hook coupler body pull bar one end is fixedlyed connected with coupler body, and the other end is connected with auxiliary hook base plate on being fixed on platform framework by bearing pin, and is welded with auxiliary hook return bar in auxiliary hook coupler body pull bar bottom.Also have the auxiliary hook return spring in auxiliary hook base plate one side, this return spring is fixed on the platform framework, and the upper end is connected with the auxiliary hook coupler body by auxiliary hook return bar, auxiliary hook coupler body pull bar, is used for the self-return after the whole auxiliary hook displacement.And the return of main hook is to carry out automatically by the action of gravity of hydraulic cylinder and main hook coupler body etc.
Hydraulic system.The hydraulic system of main hoist is positioned at platform framework, and wherein, the fuel tank of hydraulic system is installed on the platform framework by bolt; The oil circuit integrated package of motor and integrated overflow valve, solenoid operated directional valve, flow divider-combiner, equalizing valve is installed on the fuel tank respectively; Hydraulic pump is installed on the output axle head of motor, and hydraulic cylinder is used for the ascending, descending control action of operating platform.Hydraulic system is controlled main hoist and secondary elevating mechanism simultaneously; Main hoist is connected by hydraulic tube with secondary elevating mechanism, and is synchronous with the rising, the down maneuver that guarantee major and minor elevating mechanism.
Lifting gear is before operation, and the coupler body of its major and minor hook all is hung on the same rack beam of aerial work platform support.Operating process is during rising:
First step operation hydraulic system protrudes upward the piston rod of main hook hydraulic cylinder, on the rack beam above piston rod top coupler body is hung.
Second step was shunk hydraulic cylinder, and the platform framework that is connected with lifting gear is risen under the pulling of hydraulic cylinder; Auxiliary hook also rises thereupon, and makes the coupler body of auxiliary hook hang on the same rack beam of aerial work platform support automatically.
The 3rd step repeated the first step and the operation of second step if continue to rise.The displacement of main hook and auxiliary hook all realizes by the inclined-plane on coupler body top in the rising operating process.
During step-down operation:
The first step is shunk hydraulic cylinder, makes the coupler body of the auxiliary hook segment distance that at first rises under the lifting of hydraulic cylinder, leaves rack beam.
Second step was loosened the cam disc lock pin of auxiliary hook, and cam disc is rotated down under the deadweight effect.
The big chamber oil-feed of the 3rd step control hydraulic cylinder, piston rod stretches out, the platform framework decline that makes auxiliary hook and be connected with climbing device, the cam disc lower limb of auxiliary hook contacts with rack beam, forces auxiliary hook to produce displacement, and crosses rack beam smoothly.
The 4th step controlled hydraulic system is suspended decline, pins the cam disc of auxiliary hook with lock pin.
The 5th step continued to descend, and auxiliary hook makes coupler body directly hang on the corresponding rack beam under the effect of auxiliary hook return spring.
The 6th step is the elongation hydraulic cylinder further, and the coupler body of main hook is separated with rack beam, and decontrols the lock pin of main hook cam disc.
The 7th step was shunk hydraulic cylinder, made the coupler body of main hook cross the upper bracket crossbeam, after pinning the main hook cam disc with lock pin once more, the coupler body of main hook was fallen on the corresponding rack beam.
The 8th step repeated the first step to the seven steps operation if continue to descend.
Compared with prior art, characteristics of the present invention are:
(1) simple in structure, simple to operate, workable, be convenient to the job site and manipulate, overcome the climbing equipment complexity that exists in the prior art, not easy-operating deficiency.
(2) compact conformation helps the layout of this lifting gear in aerial work platform equipment, does not need the annex of too much attachment device, has reliability height, characteristics that cost is low.
(3) the last lift operations of aerial work platform both had been convenient in the present invention, also be convenient to the step-down operation of equipment, changed that prior art only is convenient to the climbing operation of platform device and the state of the art that is not easy to the equipment step-down operation, make main equipment have the bigger engineering scope of application, as external surface cleaning of the maintenance of the exterior decoration again of the construction of new building structure, old building, high building structure and transformation, highrise building etc.
(4) description of drawings:
The invention will be further described below in conjunction with accompanying drawing,
Accompanying drawing 1 is a structural representation of the present invention;
Accompanying drawing 2 is front view and vertical views of the structural representation of main hoist;
Accompanying drawing 3 is front view and vertical views of the structural representation of secondary elevating mechanism;
Accompanying drawing 4 is structural representation and local enlarged diagrams of main hook;
Accompanying drawing 5 is structural representations of main hook;
Accompanying drawing 6 is structural representations of lock pin ring;
Accompanying drawing 7 is structural representations of U type adjustment card;
Accompanying drawing 8 is structural representation and partial enlarged drawings of auxiliary hook;
Accompanying drawing 9 is the process schematic diagrames that climb.Wherein:
1. main hoist 2. secondary elevating mechanism 3. hydraulic tubes 4. main hooks 5. auxiliary hooks
6. coupler body 7. cam discs 8. main hook coupler body pull bars 9. limited blocks 10. are adjusted card
11. bearing pin 12. hydraulic cylinders 13. auxiliary hook coupler body pull bars 14. auxiliary hook return springs
15. lock pin 16. lock pin rings 17. hydraulic cylinder bases 18. auxiliary hook return bars
19. auxiliary hook base plate 20. oil circuit integrated packages 21. filter screens 22. fuel tanks 23. hydraulic pumps
24. motor 25. platform frameworks 26. rack beams
(5) specific embodiment
Present embodiment comprises main hoist 1 and secondary elevating mechanism 2; Main hoist comprises main hook 4, auxiliary hook 5 and hydraulic system, as accompanying drawing 2; Secondary elevating mechanism comprises main hook 4 and auxiliary hook 5, as accompanying drawing 3.Major and minor elevating mechanism all is installed in two different platform frameworks of same platform, and interconnect with the work that realizes major and minor elevating mechanism by hydraulic tube 3 synchronous, as accompanying drawing 1.
Main hook.As shown in Figure 4, main hook is by coupler body 6, cam disc 7, main hook coupler body pull bar 8, limited block 9, U type adjustment card 10, bearing pin 11, hydraulic cylinder 12, and lock pin 15, lock pin ring 16 constitute.In the present embodiment, coupler body 6 is a forge piece, and profile is a sealene triangle: its base is a straight flange, is used for being connected with main hook coupler body pull bar; One side is a hypotenuse, and the angle of its inclined-plane and horizontal plane is 55 degree, and coupler body 6 is in uphill process, and the coupler body inclined-plane contacts with rack beam 26, forces coupler body outwards to produce rotation, realizes main hook, auxiliary hook displacement.And there is the projection on an extend through base lower end of this hypotenuse, has formed hook.The middle part of coupler body is arranged above and below two and is used to assemble the internal thread hole of limited block 9 and cam disc 7: an end has externally threaded cylinder limited block 9 to be fixedly mounted on coupler body by top internal thread hole, is used to limit the extreme position that cam disc 7 rotates; Cam disc 7 is by flexibly connecting between following internal thread hole and the coupler body.The coupler body bottom is the coupler body pull bar of cylindricality, and the bottom of this pull bar is the auricle of a pair of band connecting hole.The U type adjustment card 10 of band handle is made up of handle and a pair of clamp, its profile such as branch, spacing between two clamps should satisfy the needs that the pull bar auricle is installed, all there is connecting hole at the clamp middle part, and the hole on the piston rod of hole on this connecting hole and the auricle and hydraulic cylinder 12, be through hole, and internal diameter is identical.From inside to outside the connecting hole on piston rod, pull bar auricle and the U type adjustment card of hydraulic cylinder 12 is linked together by bearing pin 11 successively, and make movable cooperation the between the three.Cam disc 7 is the large semicircle disk of an off-centre, on the circular arc limit of cam disc 7, a lockhole is arranged; To make its straight flange and horizontal angle be 45 when spending when cam disc rotates up, on a side external surface of the corresponding main hook coupler body of the lockhole on the cam disc 7 pull bar, two annular lock pins of horizontal fixed ring 16, the internal diameter of this lock pin ring is greater than the external diameter of lock pin 15, be movable the cooperation between the two, and the axis of this lock pin ring 16 is vertical mutually with the card of cam disc 7.Shown in accompanying drawing 5, accompanying drawing 6, lock pin 15 is placed in the lock pin ring, when an end of lock pin inserts in the cam disc lockhole, can be with the locking that relatively rotates of cam disc and coupler body; When decontroling lock pin 15, cam disc 7 is sagging naturally under the deadweight effect, the displacement of whole coupler body mechanism in the time of can realizing coupler body 6 declines.
Auxiliary hook.Auxiliary hook is made of coupler body 6, cam disc 7, limited block 9, bearing pin 11, auxiliary hook coupler body pull bar 13, lock pin 15, lock pin ring 16, auxiliary hook return spring 14, auxiliary hook return bar 18 as shown in Figure 8.The wherein structure of coupler body 6, cam disc 7, lock pin 15, lock pin ring 16, limited block 9 and mutual connected mode identical with main hook (accompanying drawing 4,5).Auxiliary hook coupler body pull bar 13 1 ends and coupler body fixedly are welded to connect, and the other end is connected with auxiliary hook base plate 19 on being fixed on platform framework by bearing pin, and is welded with auxiliary hook return bar 18 in auxiliary hook coupler body pull bar bottom.Also have auxiliary hook return spring 14 in auxiliary hook base plate 19 1 sides, this return spring is fixed on the platform framework, and the upper end is connected with the auxiliary hook coupler body by auxiliary hook return bar 18, auxiliary hook coupler body pull bar 13, is used for the self-return after the whole auxiliary hook displacement.And the return of main hook is to carry out automatically by the action of gravity of hydraulic cylinder and main hook coupler body etc.
Hydraulic system.Hydraulic system is installed in the platform framework 25 with main hoist, and the output of hydraulic system, input oil pipe are connected with the hydraulic cylinder 12 of main hoist, secondary elevating mechanism respectively.The fuel tank 22 of hydraulic system is by on the base plate that is bolted to platform framework 25, the oil circuit integrated package 20 of motor 24 and integrated overflow valve, solenoid operated directional valve, flow divider-combiner, equalizing valve is installed in respectively on the fuel tank 22, and hydraulic pump 23 is installed on the output axle head of motor.Hydraulic cylinder 12 is used for the ascending, descending control action of operating platform.The hydraulic cylinder of secondary elevating mechanism is connected with the hydraulic system of main hoist by hydraulic tube 3, and makes the rising of major and minor elevating mechanism, down maneuver synchronous.
Lifting gear is before operation, and the coupler body 6 of its main hook 4 and auxiliary hook 5 all is hung on same (level) rack beam 26 of aerial work platform support.Operating process is during rising:
First step operation hydraulic system protrudes upward the piston rod of main hook hydraulic cylinder 12, on the rack beam 26 above piston rod top coupler body 6 is hung.
Second step was shunk hydraulic cylinder, and the platform framework 25 that is connected with lifting gear is risen under the pulling of hydraulic cylinder; Auxiliary hook 5 also rises thereupon, and makes the coupler body 6 of auxiliary hook hang on the same rack beam 26 of aerial work platform support automatically.
The 3rd step repeated the first step and the operation of second step if continue to rise.The displacement of main hook 4 and auxiliary hook 5 all realizes by the inclined-plane on coupler body top in the rising operating process.
During step-down operation:
The first step is shunk hydraulic cylinder, makes the coupler body 6 of auxiliary hook 5 segment distance that at first rises under the lifting of hydraulic cylinder, leaves rack beam 26 (Fig. 9 b).
Second step was loosened the cam disc lock pin 15 of auxiliary hook 5, and cam disc 7 is rotated down (Fig. 9 c) under the deadweight effect.
The 12 big chamber oil-feeds of the 3rd step control hydraulic cylinder, piston rod stretches out, platform framework 25 declines that make auxiliary hook 5 and be connected with climbing device, and cam disc 7 lower limbs of auxiliary hook 5 contact with rack beam 26, force auxiliary hook 5 to produce displacement, and cross rack beam (Fig. 9 d) smoothly.
The 4th step controlled hydraulic system is suspended decline, pins the cam disc 7 (Fig. 9 e) of auxiliary hooks with lock pin 15.
The 5th step continued to descend, and auxiliary hook 5 makes coupler body 6 directly hang on the corresponding rack beam 26 under the effect of auxiliary hook return spring 14.
The 6th step is elongation hydraulic cylinder 12 further, and the coupler body 6 of main hook 4 is separated with rack beam 26, and decontrols the lock pin 15 of main hook cam disc.
The 7th step was shunk hydraulic cylinder 12, made the coupler body of main hook cross upper bracket crossbeam 26, after pinning main hook cam disc 7 with lock pin 15 once more, the coupler body of main hook was fallen on the corresponding rack beam 26.
The 8th step repeated the first step to the seven steps operation if continue to descend.
Claims (3)
1. lifting gear that is used for aerial work platform is characterized in that:
A. lifting gear comprises main hoist and secondary elevating mechanism (2), and main hoist is with in secondary elevating mechanism is installed on two different platform frameworks of same platform (25) respectively; Main hoist (1) and secondary elevating mechanism (2) include main hook (4) and auxiliary hook (5), and main hoist (1) also includes hydraulic system;
B. main hook and auxiliary hook include coupler body (6), cam disc (7), limited block (9), bearing pin (11), lock pin (15), lock pin ring (16), and wherein: coupler body (6) one sides are the inclined-plane, and the downward extend through coupler body of this side (6) base has formed hook; Limited block (9) and cam disc (7) internal thread hole at the middle part by being positioned at coupler body respectively are installed on the coupler body; On the circular arc limit of cam disc (7), a lockhole is arranged; Lock pin ring (16) be positioned at cam disc (7) on a side external surface of the corresponding main hook coupler body of lockhole pull bar (8) on, the axis of lock pin ring (16) is vertical mutually with the card of cam disc (7), and lock pin (15) passes lock pin ring (16); When an end of lock pin (15) inserts in cam disc (7) lockhole, can be with the locking that relatively rotates of cam disc and coupler body (6); When decontroling lock pin (15), cam disc (7) is sagging naturally under the deadweight effect, the displacement of whole coupler body mechanism in the time of can realizing coupler body (6) decline;
C. an end of main hook coupler body pull bar (8) is fixedlyed connected with coupler body, and the other end is the auricle of a pair of band connecting hole; U type adjustment card (10) is made up of handle and a pair of clamp, all there is connecting hole at the clamp middle part, from inside to outside piston rod, main hook coupler body pull bar auricle and the U type adjustment card of hydraulic cylinder (12) is set on together with bearing pin (11) successively, and makes movable cooperation the between the three; Auxiliary hook coupler body pull bar (13) one ends are fixedlyed connected with coupler body, and the other end is connected with auxiliary hook base plate (19) on being fixed on platform framework by bearing pin;
D. auxiliary hook (5) has also comprised auxiliary hook return spring (14); Auxiliary hook return spring (14) is positioned at a side of auxiliary hook base plate (19), is fixed on the platform framework (25), and the upper end is connected with coupler body (6) by auxiliary hook return bar (18), auxiliary hook coupler body pull bar (13), is used for the self-return after whole auxiliary hook (5) displacement;
E. hydraulic system is installed in the platform framework (25) with main hoist, and the output of hydraulic system, input oil pipe are connected with the hydraulic cylinder (12) of main hoist, secondary elevating mechanism respectively; The outer shell of hydraulic cylinder is connected with hydraulic cylinder base in the hydraulic system; Hydraulic cylinder is as the element of stretching, contract of main hook, and its outer shell is connected with hydraulic cylinder base by bearing pin, and hydraulic cylinder base is fixedly installed in the platform framework bottom surface.
2. the lifting gear that is used for aerial work platform according to claim 1 is characterized in that the inclined-plane on coupler body (6) one skew back limits and the angle of horizontal plane are 55 degree.
3. the lifting gear that is used for aerial work platform according to claim 1 is characterized in that the internal thread hole that limited block (9) and cam disc (7) are installed is arranged above and below on coupler body (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2006101052206A CN101205761B (en) | 2006-12-21 | 2006-12-21 | Lifting gear for highrise operation platform |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2006101052206A CN101205761B (en) | 2006-12-21 | 2006-12-21 | Lifting gear for highrise operation platform |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101205761A CN101205761A (en) | 2008-06-25 |
| CN101205761B true CN101205761B (en) | 2011-05-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2006101052206A Expired - Fee Related CN101205761B (en) | 2006-12-21 | 2006-12-21 | Lifting gear for highrise operation platform |
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| CN (1) | CN101205761B (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103132901B (en) * | 2011-11-23 | 2015-04-22 | 中冶宝钢技术服务有限公司 | Climbing device of vertical ladder and climbing method |
| CN102777023B (en) * | 2012-07-24 | 2014-07-02 | 中国建筑股份有限公司 | Construction platform transmission mechanism |
| CN104541618A (en) * | 2014-12-14 | 2015-04-29 | 郑州智联自动化设备有限公司 | Cultivator with height-adjustable weeder |
| CN104541617A (en) * | 2014-12-14 | 2015-04-29 | 郑州智联自动化设备有限公司 | Cultivator |
| CN106495053B (en) * | 2016-12-28 | 2020-01-07 | 武汉武船重型装备工程有限责任公司 | Hydraulic lifting working platform and platform lifting method |
| CN107899257B (en) * | 2017-11-28 | 2020-03-24 | 华强方特（芜湖）文化科技有限公司 | Annular wiya system convenient to operate |
| CN112049401A (en) * | 2020-09-08 | 2020-12-08 | 西北工业大学 | Lifting device and method of attached self-lifting high-altitude sliding mode operation platform |
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|---|---|---|---|---|
| JP2000053387A (en) * | 1998-04-28 | 2000-02-22 | Sang Bo Construction Co | Safety fence for building construction |
| EP1197615A2 (en) * | 2000-10-13 | 2002-04-17 | Skyform (Scotland) Limited | Cradle |
| US6732835B1 (en) * | 2002-12-23 | 2004-05-11 | Souto Joao | Roofing stage for pitched roofs |
| CN1693628A (en) * | 2005-05-31 | 2005-11-09 | 深圳市特辰升降架工程有限公司 | Mechanized lifting scaffold and its lifting method |
| WO2006073944A2 (en) * | 2004-12-30 | 2006-07-13 | Iacoviello Jr Arnold | Building escape railing system |
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2006
- 2006-12-21 CN CN2006101052206A patent/CN101205761B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000053387A (en) * | 1998-04-28 | 2000-02-22 | Sang Bo Construction Co | Safety fence for building construction |
| EP1197615A2 (en) * | 2000-10-13 | 2002-04-17 | Skyform (Scotland) Limited | Cradle |
| US6732835B1 (en) * | 2002-12-23 | 2004-05-11 | Souto Joao | Roofing stage for pitched roofs |
| WO2006073944A2 (en) * | 2004-12-30 | 2006-07-13 | Iacoviello Jr Arnold | Building escape railing system |
| CN1693628A (en) * | 2005-05-31 | 2005-11-09 | 深圳市特辰升降架工程有限公司 | Mechanized lifting scaffold and its lifting method |
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| CN101205761A (en) | 2008-06-25 |
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Granted publication date: 20110518 Termination date: 20131221 |