CN108952557A - A kind of wall plastering dedicated finishing ramp mobile with reacting force of supporting - Google Patents
A kind of wall plastering dedicated finishing ramp mobile with reacting force of supporting Download PDFInfo
- Publication number
- CN108952557A CN108952557A CN201810682669.1A CN201810682669A CN108952557A CN 108952557 A CN108952557 A CN 108952557A CN 201810682669 A CN201810682669 A CN 201810682669A CN 108952557 A CN108952557 A CN 108952557A
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- CN
- China
- Prior art keywords
- pulley
- lifting
- finishing
- ramp
- disc spring
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- E—FIXED CONSTRUCTIONS
- E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
- E06C—LADDERS
- E06C1/00—Ladders in general
- E06C1/02—Ladders in general with rigid longitudinal member or members
- E06C1/38—Special constructions of ladders, e.g. ladders with more or less than two longitudinal members, ladders with movable rungs or other treads, longitudinally-foldable ladders
- E06C1/397—Special constructions of ladders, e.g. ladders with more or less than two longitudinal members, ladders with movable rungs or other treads, longitudinally-foldable ladders characterised by having wheels, rollers, or runners
-
- E—FIXED CONSTRUCTIONS
- E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
- E06C—LADDERS
- E06C7/00—Component parts, supporting parts, or accessories
-
- E—FIXED CONSTRUCTIONS
- E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
- E06C—LADDERS
- E06C7/00—Component parts, supporting parts, or accessories
- E06C7/12—Lifts or other hoisting devices on ladders
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Transmission Devices (AREA)
Abstract
The invention discloses a kind of wall plastering dedicated finishing ramps mobile with reacting force of supporting, its structure includes finishing ramp, go up and down support tube, straight line walking device, guardrail, universal caster wheel, support tube is gone up and down by outer tube, first auxiliary fixed pulley, go up and down inner tube, rack gear, positioning mechanism, gear, lifting knob axis composition, lifting inner tube, which is controlled, using lifting knob axis drives straight line walking device overhead ceiling, form a supporting role, it avoids finishing ramp and the possibility shaken and translated into occurs in operating personnel's work, the rotation of disc spring device is driven by bracing wire, so that disc spring device drives ratchet to start to rotate using pawl, and ratchet is close to using the second belt pulley band movable pulley with ceiling, pulley drives finishing ramp integrally to travel on the ground by frictional force, improve the working efficiency of operating personnel, and Physical strength is reduced, the time is saved.
Description
Technical field
The present invention relates to wall plastering special-purpose ladder fields, particularly with regard to a kind of wall mobile with reacting force of supporting
Body paints dedicated finishing ramp.
Background technique
Wall plastering is generally divided into lower half wall and upper half wall two parts, and operating personnel only needs when lower half wall plastering
Wall can be painted at ground by standing, and upper half wall plastering needs to carry out operation by movable stand or finishing ramp.
Technology is common at present has the disadvantages that
1, operating personnel station fit up ramp on paint when, due to sometimes act it is larger will appear shaking and translate into
Possibility, the work quality of operating personnel cannot be guaranteed and may also suffer from falling down risk.
2, it needs to be displaced after operating personnel completes a part painting when working on it is necessary to oneself getting off to re-move dress
Ramp is repaired, the work that climbs up is then attached to, greatly wastes time and the physical strength of operating personnel, reduces work effect
Rate.
Summary of the invention
In view of the deficiencies of the prior art, the present invention is to realize by the following technical solutions: one kind has support is anti-to make
The dedicated finishing ramp of the wall plastering firmly moved, structure include finishing ramp, lifting support tube, straight line walking
Device, guardrail, universal caster wheel；
There are four universal caster wheel, the finishing ramp side is equipped with shield for the finishing ramp bottom end installation
Column, the finishing ramp and guardrail activity cooperation, the lifting support tube bottom end are welded on the mobile ladder top of finishing vertically
On end surfaces, the lifting support tube head end is equipped with straight line walking device, and the lifting support tube passes through straight line walking device
The threaded hole that bottom surface middle position is equipped with is threadedly coupled；
The lifting support tube is by outer tube, the first auxiliary fixed pulley, lifting inner tube, rack gear, positioning mechanism, gear, liter
Rotation axis composition drops, and the outer tube middle position is equipped with lifting inner tube, and the outer tube and lifting inner tube pass through the
One auxiliary fixed pulley is slidably matched, and the lifting outer wall of inner tube has rack gear, the lifting knob axis one by electric welding
End is through to inner wall by outer tube outer wall, and gear is equipped on lifting knob axis one end, and the gear and rack gear are meshed, institute
The positioning mechanism one end stated equally is through to inner wall by outer tube outer wall, and positioning mechanism one end is inserted on rack surface, Yi Jiyu
Gear matches.
As advanced optimizing for the technical program, the positioning mechanism is by pole cap, reset spring, locating rod, kelly
There are pole cap in composition, described locating rod one end by electric welding, kelly are fixedly installed in the locating rod, and described determines
Position bar surface is equipped with reset spring and is connected with kelly.
As advanced optimizing for the technical program, the straight line walking device is by shell, first manual driving mechanism, cunning
Wheel, the second Manual drive mechanism composition, the groove on the shell middle position set that there are four pulley, the shell and cunnings
Wheel matches, and pulley, first belt are equipped in the first manual driving mechanism and the second Manual drive mechanism
Wheel is inserted embedded in pulley spindle in the heart by transmission shaft.
As advanced optimizing for the technical program, the first manual driving mechanism by disc spring device, ratchet, pawl,
Driving belt, the first belt pulley, the second auxiliary fixed pulley, bracing wire, the second belt pulley set are at the disc spring device front end interposition
It sets and is equipped with ratchet, pawl, the disc spring device and ratchet are installed in the disc spring device front-end surface and are driven by pawl
Connection, the ratchet front end middle position are equipped with the second belt pulley by shaft, and first belt pulley is set to pulley
It side and is firmly connected with it, first belt pulley and the second belt pulley are matched by driving belt, the disc spring
Device side is equipped with bracing wire, and the disc spring device is connected with bracing wire, and the bracing wire is equipped with the second auxiliary fixed pulley, and logical
The second auxiliary fixed pulley is crossed to match with enclosure interior bottom end.
As advanced optimizing for the technical program, the pulley further includes convex ball, equidistant on the pulley surface
More than two convex balls are distributed, the pulley is fixedly connected with convex ball, and the pulley with ceiling when contacting, due to cunning
Wheel and ceiling face are too smooth, cause to rub too small, may cause to skid, therefore add convex ball and improve pulley and smallpox
It rubs between plate, skidding when pulley being avoided to rotate.
As advanced optimizing for the technical program, the first manual driving mechanism and the second Manual drive mechanism are equal
For identical structure, the direction only operated is opposite.
As advanced optimizing for the technical program, the locating rod is against on rack surface, and kelly but be stuck in
Gear top, avoids gear from reversely rotating, and lifting inner tube is caused to decline automatically.
Beneficial effect
A kind of wall plastering dedicated finishing ramp mobile with reacting force of supporting of the present invention, will fit up ramp
After being moved to designated position, after operating personnel gets on, gear band carry-over bar is controlled by lifting knob axis and is risen, rack gear and lifting
The welding of inner tube inner tube, therefore lifting inner tube drive straight line walking device rises on ceiling and supports finishing ramp, avoids filling
It repairs ramp to occur shaking or translate into, and pulley is close to ceiling, then pulls bracing wire, disc spring device is driven by bracing wire
Rotation, and disc spring device is connected with pawl, therefore pawl drives ratchet one-way rotation, and in its natural state inside disc spring device
Disc spring is to stretch disc spring by relaxing to tight state using bracing wire in deflated state, when disc spring deformation to a certain degree when, as long as coming loose
Bracing wire, disc spring can restore to the original state and return to original position with pawl, and ratchet and the second belt pulley are connected by shaft, and second
Belt pulley drives the rotation of the first belt pulley by driving belt, and power is transmitted to pulley by the first belt pulley, therefore pulley utilizes
Being bonded between ceiling drives the whole forward rectilinear traveling of finishing ramp, otherwise passes through second-hand under physical principle
The whole straight-line travelling backward of dynamic driving mechanisms control finishing ramp pulls outward pole cap if lifting inner tube is put down
It is dynamic so that pole cap drives locating rod and rack gear decoupling and kelly and gear also decoupling, and go up and down inner tube then by
Self gravity starts to decline automatically.
Compared with prior art, the beneficial effects of the present invention are:
1, lifting inner tube is controlled using lifting knob axis and drive straight line walking device overhead ceiling, form a support and make
With, avoid finishing ramp operating personnel work when there is the possibility shaken and translated into.
2, the rotation of disc spring device is driven by bracing wire, so that disc spring device drives ratchet to start to rotate using pawl, and ratchet is sharp
It is close to the second belt pulley band movable pulley with ceiling, pulley drives finishing ramp integrally to go on the ground by frictional force
It sails, improves the working efficiency of operating personnel, and reduce physical strength, save the time.
Detailed description of the invention
Upon reading the detailed description of non-limiting embodiments with reference to the following drawings, other feature of the invention,
Objects and advantages will become more apparent upon:
Fig. 1 is that a kind of structure of the dedicated finishing ramp of wall plastering mobile with reacting force of supporting of the present invention is shown
It is intended to.
Fig. 2 is a kind of dedicated finishing ramp lifting support of wall plastering mobile with reacting force of supporting of the present invention
The structural schematic diagram of pipe.
Fig. 3 is the amplification of the dedicated finishing ramp A of wall plastering mobile with reacting force of supporting of the present invention a kind of
Figure.
Fig. 4 is a kind of dedicated finishing ramp straight line walking of wall plastering mobile with reacting force of supporting of the present invention
The overlooking structure diagram of device.
Fig. 5 is a kind of dedicated finishing ramp straight line walking of wall plastering mobile with reacting force of supporting of the present invention
The side structure schematic view of device.
In figure: finishing ramp -1, lifting support tube -2, straight line walking device -3, guardrail -4, universal caster wheel -5, outer tube -
201, the first auxiliary fixed pulley -202, lifting inner tube -203, rack gear -204, positioning mechanism -205, gear -206, lifting knob
Axis -207, pole cap -2051, reset spring -2052, locating rod -2053, kelly -2054, shell -301, first manual driving machine
Structure -302, pulley -303, the second Manual drive mechanism -304, disc spring device -3021, ratchet -3022, pawl -3023, transmission skin
The -3024, first belt pulley -3025 of band, the second auxiliary fixed pulley -3026, bracing wire -3027, the second belt pulley -3028, convex ball -
3031。
Specific embodiment
To be easy to understand the technical means, the creative features, the aims and the efficiencies achieved by the present invention, below with reference to
Specific embodiment and Detailed description of the invention, the preferred embodiment that the present invention is further explained.
Embodiment
Fig. 1-Fig. 5 is please referred to, the present invention provides a kind of wall plastering dedicated finishing mobile with reacting force of supporting
Ramp, structure include finishing ramp 1, lifting support tube 2, straight line walking device 3, guardrail 4, universal caster wheel 5, the dress
The installation of 1 bottom end of ramp is repaired there are four universal caster wheel 5,1 side of finishing ramp is equipped with guardrail 4, the finishing
The 4 activity cooperation of ramp 1 and guardrail, 2 bottom end of lifting support tube are welded on vertically on finishing 1 top end surface of ramp,
2 head end of lifting support tube is equipped with straight line walking device 3, and the lifting support tube 2 passes through in 3 bottom surface of straight line walking device
Between the threaded hole that is equipped with of position be threadedly coupled, the lifting support tube 2 assists fixed pulley 202 by outer tube 201, first, rises
It drops inner tube 203, rack gear 204, positioning mechanism 205, gear 206, lifting knob axis 207 to form, 201 bosom of outer tube
Position is equipped with lifting inner tube 203, the outer tube 201 and lifting inner tube 203 and is matched by the first auxiliary sliding of fixed pulley 202
It closes, 203 outer wall of lifting inner tube has rack gear 204 by electric welding, and described 207 one end of lifting knob axis is by outer tube
201 outer walls are through to inner wall, and gear 206 is equipped on 207 one end of lifting knob axis, 204 phase of the gear 206 and rack gear
Engagement, described 205 one end of positioning mechanism is equally through to inner wall by 201 outer wall of outer tube, and 205 one end of positioning mechanism is inserted in tooth
It on 204 surface of item, and matches with gear 206, above-mentioned is to control gear 206 using lifting knob axis 207 to drive in lifting
Rack gear 204 on pipe 203 rises, and enables lifting inner tube 203 that straight line walking device 3 is supported overhead ceiling, consolidates finishing
Ramp 1 avoids the occurrence of shaking and translates into.
The positioning mechanism 205 is made of pole cap 2051, reset spring 2052, locating rod 2053, kelly 2054, described
2053 one end of locating rod have pole cap 2051 by electric welding, be fixedly installed with kelly 2054 in the locating rod 2053,
2053 surface of locating rod is equipped with reset spring 2052 and is connected with kelly 2054, which utilizes locating rod 2053
The downslide of rack gear 204 is resisted, gear 206 is blocked by kelly 2054 and is reversely rotated.
The straight line walking device 3 is by shell 301, first manual driving mechanism 302, pulley 303, the second manual-driven machine
Structure 304 forms, and the groove on 301 middle position of shell sets that there are four pulley 303, the shells 301 and pulley 303
It matches, is equipped with pulley 303 in the first manual driving mechanism 302 and the second Manual drive mechanism 304, described
One belt pulley 3025 is inserted on 303 axle center of pulley by transmission shaft, is driven manually by first manual driving mechanism 302 and second
The control finishing straight line under reacting force of supporting of ramp 1 of motivation structure 304 moves back and forth.
The first manual driving mechanism 302 by disc spring device 3021, ratchet 3022, pawl 3023, driving belt 3024,
First belt pulley 3025, second assists fixed pulley 3026, bracing wire 3027, the second belt pulley 3028 composition, the disc spring device
3021 front ends middle position are equipped with ratchet 3022, are equipped with pawl 3023 in 3021 front-end surface of disc spring device, described
Disc spring device 3021 and ratchet 3022 be sequentially connected by pawl 3023, the 3022 front end middle position of ratchet passes through shaft
Second belt pulley 3028 is installed, first belt pulley 3025 is set to 303 side of pulley and is firmly connected with it, described
First belt pulley 3025 and the second belt pulley 3028 are matched by driving belt 3024, are set on 3021 side of disc spring device
There is bracing wire 3027, the disc spring device 3021 is connected with bracing wire 3027, and it is fixed sliding that the bracing wire 3027 is equipped with the second auxiliary
Wheel 3026, and matched by the second auxiliary fixed pulley 3026 with 301 inner bottom of shell, disc spring device is pulled using bracing wire 3027
3021 rotations drive ratchet 3022 to rotate, and the rotation of the second belt pulley 3028 are driven by ratchet 3022, so that the second belt pulley
3028 cooperate the first belt pulley 3025 to drive with movable pulley 303 by driving belt 3024.
The pulley 303 further includes convex ball 3031, and be equally spaced more than two convex balls on 303 surface of pulley
3031, the pulley 303 is fixedly connected with convex ball 3031, and the pulley 303 with ceiling when contacting, due to pulley
303 and ceiling face it is too smooth, cause to rub too small, may cause to skid, therefore add convex ball 3031 and improve pulley
It rubs between 303 and ceiling, skidding when pulley 303 being avoided to rotate.
The first manual driving mechanism 302 and the second Manual drive mechanism 304 is identical structure, is only operated
Direction is that opposite, described locating rod 2053 is against on 204 surface of rack gear, and kelly 2054 but be stuck in 206 top of gear,
It avoids gear 206 from reversely rotating, causes to go up and down the decline automatically of inner tube 203.
After finishing ramp 1 is moved to designated position, after operating personnel gets on, tooth is controlled by lifting knob axis 207
206 band carry-over bar 204 of wheel rises, rack gear 204 and lifting 203 inner tube of inner tube welding, therefore goes up and down inner tube 203 and drive straight line walking
Device 3, which rises on ceiling, supports finishing ramp 1, avoids finishing ramp 1 from occurring shaking or translate into, and pulley
303 are close to ceiling, then pull bracing wire 3027, drive disc spring device 3021 to rotate by bracing wire 3027, and disc spring device 3021
It is connected with pawl 3023, therefore pawl 3023 drives 3022 single direction rotation of ratchet, and in its natural state in disc spring device 3021
The disc spring in portion is to stretch disc spring by relaxing to tight state using bracing wire 3027 in deflated state, when disc spring deformation to a certain degree when,
As long as coming loose bracing wire 3027, disc spring can restore to the original state and return to original position, ratchet 3022 and the second belt with pawl 3023
Wheel 3028 is connected by shaft, and the second belt pulley 3028 drives the rotation of the first belt pulley 3025 by driving belt 3024, and
Power is transmitted to pulley 303 by the first belt pulley 3025, thus pulley 303 using with being bonded between ceiling, in physical principle
Under, the whole forward rectilinear traveling of finishing ramp 1 is driven, otherwise passes through the second Manual drive mechanism 304 control finishing ramp 1
Whole straight-line travelling backward pulls out pole cap 2051, if lifting inner tube 203 is put down so that 2051 band of pole cap
Locating rod 2053 and 204 decoupling of rack gear and kelly 2054 and gear 206 also decoupling are moved, and goes up and down inner tube 203 then
Started to decline automatically by self gravity.
Problems solved by the invention is to drive 3 overhead of straight line walking device using the control lifting inner tube 203 of lifting knob axis 207
Ceiling forms a supporting role, and avoid that finishing ramp 1 occurs shaking and translate into operating personnel's work can
Can, drive disc spring device 3021 to rotate by bracing wire 3027, so that disc spring device 3021 drives ratchet 3022 to start using pawl 3023
Rotation, and ratchet 3022 is close to movable pulley 303 with ceiling using the second belt pulley 3028, pulley 303 passes through frictional force band
Dynamic finishing ramp 1 is whole to travel on the ground, improves the working efficiency of operating personnel, and reduce physical strength, saves the time.
The basic principles, main features and advantages of the present invention have been shown and described above, the technology of the industry
Personnel are it should be appreciated that the present invention is not limited to the above embodiments, and the above embodiments and description only describe this
The principle of invention can not only be realized in other specific forms under the premise of not departing from spirit of that invention or essential characteristic
The present invention will also have various changes and improvements, these changes and improvements both fall within scope of the claimed invention, therefore this hair
Bright claimed range is defined by appended claims and its equivalent, rather than above description limits.
In addition, it should be understood that although this specification is described in terms of embodiments, but not each embodiment is only wrapped
Containing an independent technical solution, this description of the specification is merely for the sake of clarity, and those skilled in the art should
It considers the specification as a whole, the technical solutions in the various embodiments may also be suitably combined, forms those skilled in the art
The other embodiments being understood that.
Claims (5)
1. a kind of wall plastering dedicated finishing ramp mobile with reacting force of supporting, structure includes finishing ramp
(1), support tube (2), straight line walking device (3), guardrail (4), universal caster wheel (5) are gone up and down, it is characterised in that:
There are four finishing ramp (1) the bottom end installations universal caster wheel (5), sets on described finishing ramp (1) side
Have guardrail (4), the finishing ramp (1) and guardrail (4) activity cooperation, described lifting support tube (2) bottom end is welded vertically
It connects on finishing ramp (1) top end surface, lifting support tube (2) head end is equipped with straight line walking device (3), described
Lifting support tube (2) is threadedly coupled by the threaded hole that straight line walking device (3) bottom surface middle position is equipped with；
The lifting support tube (2) is by outer tube (201), the first auxiliary fixed pulley (202), lifting inner tube (203), rack gear
(204), positioning mechanism (205), gear (206), lifting knob axis (207) composition, the outer tube (201) bosom position
It is equipped with lifting inner tube (203), the outer tube (201) and lifting inner tube (203) and passes through the first auxiliary fixed pulley (202) sliding
Cooperation, lifting inner tube (203) outer wall have rack gear (204) by electric welding, described lifting knob axis (207) one end
Inner wall is through to by outer tube (201) outer wall, and gear (206), the gear are installed on lifting knob axis (207) one end
(206) it being meshed with rack gear (204), the positioning mechanism (205) one end is equally through to inner wall by outer tube (201) outer wall,
And positioning mechanism (205) one end is inserted on rack gear (204) surface, and is matched with gear (206).
2. a kind of wall plastering dedicated finishing ramp mobile with reacting force of supporting according to claim 1,
It is characterized by: the positioning mechanism (205) is by pole cap (2051), reset spring (2052), locating rod (2053), kelly
(2054) it forms, the locating rod (2053) one end has pole cap (2051) by electric welding, the locating rod (2053)
On be fixedly installed with kelly (2054), the locating rod (2053) surface be equipped with reset spring (2052) and and kelly
(2054) it is connected.
3. a kind of wall plastering dedicated finishing ramp mobile with reacting force of supporting according to claim 1,
It is characterized by: the straight line walking device (3) is by shell (301), first manual driving mechanism (302), pulley (303),
Two Manual drive mechanisms (304) composition, the groove on the shell (301) middle position set that there are four pulley (303), described
Shell (301) and pulley (303) match, the first manual driving mechanism (302) and the second Manual drive mechanism
(304) pulley (303) are equipped on.
4. a kind of wall plastering dedicated finishing ramp mobile with reacting force of supporting according to claim 3,
It is characterized by: the first manual driving mechanism (302) is by disc spring device (3021), ratchet (3022), pawl (3023), biography
Dynamic belt (3024), the first belt pulley (3025), the second auxiliary fixed pulley (3026), bracing wire (3027), the second belt pulley
(3028) it forms, disc spring device (3021) the front end middle position is equipped with ratchet (3022), the disc spring device (3021)
It is equipped in front-end surface pawl (3023), the disc spring device (3021) and ratchet (3022) are connected by pawl (3023) transmission
It connects, the ratchet (3022) front end middle position is equipped with the second belt pulley (3028) by shaft, first belt
Wheel (3025) is set to pulley (303) side and is firmly connected with it, first belt pulley (3025) and the second belt pulley
(3028) it is matched by driving belt (3024), disc spring device (3021) side is equipped with bracing wire (3027), described
Disc spring device (3021) is connected with bracing wire (3027), and the bracing wire (3027) is equipped with the second auxiliary fixed pulley (3026), and
It is matched by the second auxiliary fixed pulley (3026) with shell (301) inner bottom.
5. the dedicated finishing movement of a kind of wall plastering mobile with reacting force of supporting according to claim 3 or 4
Ladder, it is characterised in that: the pulley (303) further includes convex ball (3031), is equally spaced two on the pulley (303) surface
A above convex ball (3031), the pulley (303) are fixedly connected with convex ball (3031).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810682669.1A CN108952557A (en) | 2018-06-27 | 2018-06-27 | A kind of wall plastering dedicated finishing ramp mobile with reacting force of supporting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810682669.1A CN108952557A (en) | 2018-06-27 | 2018-06-27 | A kind of wall plastering dedicated finishing ramp mobile with reacting force of supporting |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108952557A true CN108952557A (en) | 2018-12-07 |
Family
ID=64487583
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810682669.1A Withdrawn CN108952557A (en) | 2018-06-27 | 2018-06-27 | A kind of wall plastering dedicated finishing ramp mobile with reacting force of supporting |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108952557A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110259369A (en) * | 2019-07-31 | 2019-09-20 | 广东电网有限责任公司 | A kind of double ladder |
-
2018
- 2018-06-27 CN CN201810682669.1A patent/CN108952557A/en not_active Withdrawn
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110259369A (en) * | 2019-07-31 | 2019-09-20 | 广东电网有限责任公司 | A kind of double ladder |
| CN110259369B (en) * | 2019-07-31 | 2024-05-28 | 广东电网有限责任公司 | Herringbone ladder |
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| PB01 | Publication | ||
| PB01 | Publication | ||
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Application publication date: 20181207 |