CN109505506A - A kind of electric power special isolation ladder - Google Patents
A kind of electric power special isolation ladder Download PDFInfo
- Publication number
- CN109505506A CN109505506A CN201811616601.XA CN201811616601A CN109505506A CN 109505506 A CN109505506 A CN 109505506A CN 201811616601 A CN201811616601 A CN 201811616601A CN 109505506 A CN109505506 A CN 109505506A
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- Prior art keywords
- descending stair
- magnesium
- ladder
- electric power
- upper terraced
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- 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
- E06C1/04—Ladders for resting against objects, e.g. walls poles, trees
- E06C1/08—Ladders for resting against objects, e.g. walls poles, trees multi-part
- E06C1/10—Sections fitted end to end
-
- 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
- E06C1/14—Ladders capable of standing by themselves
- E06C1/16—Ladders capable of standing by themselves with hinged struts which rest on the ground
- E06C1/18—Ladders capable of standing by themselves with hinged struts which rest on the ground with supporting struts formed as ladders
-
- 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
- E06C1/383—Foldable ladders in which the longitudinal members are brought together on folding
-
- 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
- E06C7/10—Reinforcements for ladders
-
- E—FIXED CONSTRUCTIONS
- E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
- E06C—LADDERS
- E06C7/00—Component parts, supporting parts, or accessories
- E06C7/50—Joints or other connecting parts
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Ladders (AREA)
Abstract
The invention belongs to electric power product technical fields, disclose a kind of electric power special isolation ladder, it includes the upper terraced body and descending stair body for being respectively equipped with stull；The upper terraced body is connected with descending stair body by connecting plate；Corresponding bolt and slot are equipped between the upper terraced body and descending stair body；The side of the slot is equipped with slideway；The corner block being slidably connected is equipped in the slideway；The spring of elastic connection is equipped with behind the corner block；The corner block is equipped with handle；Insulation sleeve is cased with outside the upper terraced body and descending stair body；Anti-slip cover is cased with outside the stull.Structure of the invention is reasonable, and upper ladder body and descending stair body can fold, and is readily transported and places；Upper ladder body and descending stair body can be folded into any common angle and fixation, convenient for indoor use；Upper ladder body, descending stair body and stull use magnesium alloy material, structure is firmer, technical problem present in the effective solution insulating ladder of the prior art.
Description
Technical field
The invention belongs to electric power product technical fields, and in particular to a kind of electric power special isolation ladder.
Background technique
Electric insulation ladder is mainly used in electric operating, it is desirable that structural strength height and good insulation preformance.The prior art
There are mainly two types of electric insulation ladders, and one is the insulating ladders using the production of the bamboo body of rod, and this insulating ladder insulation effect is good, but bar
Body is longer, it has not been convenient to carry, be fallen to touch and be easily broken, be easy to rot over time；Another kind is made of aluminium alloy, outside
Face is brushed with the insulating ladder of insulated paint, and this insulating ladder, which is fallen, to be touched and will not rupture at once, but use for a long time will be slowly curved
Song deformation, structural strength is not still high, and insulated paint can wear reduction over time, and insulation effect is deteriorated.The production of part aluminium alloy
Insulating ladder can be folded in centre, in order to carry；It is equipped with corresponding lantern ring at folding, is connected and fixed by bolt, due to
It is protruded outside bolt and lantern ring, is easy to scratch, and need to pick and place bolt back and forth, use inconvenient.Magnesium alloy is most
Light structural metallic materials, specific strength low with density and specific stiffness are high, the series of advantages such as good impact resistance, but conduct
For structural material in use, due to hardness, intensity, corrosion-resistant and wearability are not ideal enough, and application is extremely limited.
Summary of the invention
Present invention aim to address the insulating ladder of the prior art, there are inconvenient to carry, purposes is single, insulation effect is poor
The technical problem low with structural strength provides a kind of electric power special isolation ladder, so as to solve the deficiencies in the prior art.
To achieve the goals above, the invention adopts the following technical scheme:
A kind of electric power special isolation ladder, it includes the upper terraced body and descending stair body for being respectively equipped with stull；The upper terraced body and descending stair body
It is connected by connecting plate；The connecting plate is located at the inside of terraced body and descending stair body；Connecting plate passes through shaft and upper terraced body respectively
It is rotatablely connected with descending stair body；Corresponding bolt and slot are equipped between the upper terraced body and descending stair body；The side of the slot is set
There is slideway；The corner block being slidably connected is equipped in the slideway；The lateral surface of the corner block is inclined-plane；After the corner block
Face is equipped with the spring of elastic connection；The corner block is equipped with handle；The outer surface difference of the upper terraced body, descending stair body and stull
Brushed with anti-corrosion insulation paint；Insulation sleeve is cased with outside the upper terraced body and descending stair body；Anti-slip cover is cased with outside the stull.
Further, the two sides of the upper terraced body and descending stair body are respectively equipped with positioning plate and positioning pin；The positioning plate
One end is rotatablely connected with upper ladder；The positioning plate is equipped with the clamping groove that a row connects positioning pin；The clamping groove is half
Circular groove, the inside of the positioning pin are equipped with a circle concave ring, and clamping groove snaps on concave ring.
Further, the upper terraced body, descending stair body and stull use magnesium alloy material, and centre is hollow hollow cavity；Institute
It states terraced body and descending stair and carries out thickening processing in other component junctions.
Further, the shaft that the connecting plate is connect with upper terraced body and descending stair body is with damping, connecting plate and upper terraced body
It will not rotate because of self gravity with descending stair body, and be shaken in addition to rotation without other directions.
Further, the bottom of the slot is equipped with groove corresponding with bolt.
Further, the upper terraced body and descending stair body are therefrom separated, the connection type of gap and upper terraced body and descending stair
The connection type of body is identical, and upper ladder body and descending stair status can be transported at 4 groups of doublings using ordinary passenger car.
As another inventive point of the invention, the invention further relates to the improvement to upper terraced body, descending stair body and stull material, institutes
It states terraced body, descending stair body and stull and is all made of magnesium alloy material；
Specifically, the magnesium alloy material is prepared according to following technique:
100 parts of magnesium ingots, 20 parts of magnesium manganese intermediate alloy MgMn5,10 parts of copper magnesium intermediate alloy CuMg10,8 parts of magnesium are taken according to parts by weight
Zirconium intermediate alloy MgZr30,5 parts of magnesium yttrium intermediate alloy MgY30；
Magnesium ingot is taken, under argon gas protection, 750 DEG C is warming up to after magnesium ingot is melted, Mg melt is obtained, then successively adds magnesium
Manganese intermediate alloy MgMn5, copper magnesium intermediate alloy CuMg10, Mg-Zr intermediate alloy MgZr30, magnesium yttrium intermediate alloy MgY30 continue
30min is refined under argon gas protection, obtains aluminium alloy；
Aluminium alloy is poured into mold, natural cooling, demoulding obtains ingot casting；Ingot casting is put into heating furnace, is warming up to 350
DEG C, 60min is kept the temperature, 50 DEG C of quenching-in water is then put into；Quenched ingot casting is put into aging furnace, is warming up to 180
DEG C, keep the temperature 3h, cooled to room temperature after coming out of the stove；Then by press machine extrusion forming to get.
Compared with prior art, the beneficial effect that the present invention obtains mainly includes but is not limited to the following aspects:
Structure of the invention is reasonable, and upper ladder body and descending stair body can fold, and is readily transported and places；Upper ladder body and descending stair body can be rolled over
Any common angle and fixation are built up, convenient for indoor use；Upper ladder body, descending stair body and stull use magnesium alloy material, structure
It is firmer, technical problem present in the effective solution insulating ladder of the prior art.The present invention in magnesium-based matter by adding
Enter intermediate alloy element, avoid scaling loss and high-melting-point alloy is not easy the problems such as fusing into, can play dispersion-strengthened action with
And solution strengthening effect, mechanical strength, hardness, wear-resisting and corrosion resistance greatly promote；Magnesium alloy can be improved in zr element
Corrosion-resistant and high temperature resistance；Intensity and hardness, the corrosion resistance and thermal stability of magnesium alloy can be enhanced in copper manganese yttrium
Can, and crystal grain, purification melt are refined, purity is improved, the uneven of crystal grain is reduced, so that institutional framework is more uniform and causes
It is close, effectively raise the processing and casting character of magnesium alloy；Yttrium can also in raw alloy oxygen, hydrogen, nitrogen, sulphur,
The impurity elements such as iron have stronger combination, it is possible to reduce gas in alloy and are mingled with, improve inclusion morphology, make to be mingled with
Mutually tend to nodularization, be conducive to the exclusion of field trash and gas, also plays cleaning molten effect.
Detailed description of the invention
Fig. 1 is schematic structural view of the invention；
Fig. 2 is descending stair body overlooking structure diagram of the present invention；
Fig. 3 is bending structure schematic diagram of the present invention.
1 in figure, upper terraced body 2, insulation sleeve 3, Anti-slip cover 4, stull 5, connecting plate 6, bolt 7, shaft 8, slot
9, descending stair body 10, slideway 11, spring 12, handle 13, hollow cavity 14, groove 15, corner block 16, positioning plate 17, fixed
Position pin 18, clamping groove.
Specific embodiment
Technical solution of the present invention is clearly and completely described below in conjunction with attached drawing, in the description of the present invention,
Embodiment described below is a part of the embodiment of the present invention, instead of all the embodiments.Based on the implementation in the present invention
Example, every other embodiment obtained by those of ordinary skill in the art without making creative efforts belong to
The scope of protection of the invention.
Embodiment 1
According to Fig. 1, Fig. 2 and Fig. 3, a kind of electric power special isolation ladder, it includes the upper terraced body 1 and descending stair body for being respectively equipped with stull 4
9；The upper terraced body 1 and descending stair body 9 are connected by connecting plate 5；The connecting plate 5 is located at the inside of terraced body and descending stair body；Even
Fishplate bar 5 is rotatablely connected by shaft 7 and upper terraced body and descending stair body respectively；Corresponding insert is equipped between the upper terraced body and descending stair body
Pin 6 and slot 8；The side of the slot is equipped with slideway 10；The corner block 15 being slidably connected is equipped in the slideway 10；Described three
The lateral surface of hornblock is inclined-plane；The spring 11 of elastic connection is equipped with behind the corner block；The corner block is equipped with handle
12；The upper terraced body, descending stair body and the outer surface of stull are brushed with anti-corrosion insulation paint respectively；The outside of the upper terraced body and descending stair body
It is cased with insulation sleeve 2；Anti-slip cover 3 is cased with outside the stull.
In use, upper ladder body and descending stair body are by connecting plate 5 and the rotation bending of shaft 7, bolt 6 is inserted from the side of slot 8
Enter, after bolt 6 touches corner block, since the lateral surface of corner block is inclined-plane, so corner block is under the extruding of bolt 6 to slideway
Inboard sliding, bolt 6 is completely into being detached from corner block after slot 8, corner block return under the elastic force of spring 11, to bolt 6 into
Row four sides, which surrounds, to be fixed.After use, stir the handle on corner block, corner block is moved in slideway, in bending terraced body and
Descending stair body, bolt 6 are detached from slot 8.
Upper ladder body and descending stair body can rotate doubling by connecting plate 5 and shaft 7, and length shortens half, convenient for conveying and
It carries, after being fixed by bolt 6 and slot 8, structural strength will not be reduced.
The two sides of the upper terraced body and descending stair body are respectively equipped with positioning plate 16 and positioning pin 17；One end of the positioning plate exists
It is rotatablely connected with upper ladder；The positioning plate is equipped with the clamping groove 18 that a row connects positioning pin；The clamping groove is semicircle
Groove, the inside of the positioning pin are equipped with a circle concave ring, and clamping groove snaps on concave ring.
After the 18 snapping positioning pin 17 of clamping groove of positioning plate 16, when can regard double ladder use, especially office operation,
More abundant, the direct snapping positioning pin 17 of clamping groove 18 of positioning plate 16 using function, since the inside of positioning pin is equipped with a circle
Concave ring snaps on concave ring from top to bottom, does not fall out, safely and conveniently.
The upper terraced body, descending stair body and stull use magnesium alloy material, and centre is hollow hollow cavity 13；The upper terraced body
Thickening processing is carried out in other component junctions with descending stair.
Using magnesium alloy, weight can be allowed to mitigate significantly, be convenient for manual handling and carrying.
The shaft 7 that the connecting plate is connect with upper terraced body and descending stair body is with damping, connecting plate and upper terraced body and descending stair body
It will not rotate because of self gravity, and be shaken in addition to rotation without other directions.
Shaft 7 allows terraced body to connect with descending stair body more compact, as an entirety, prevents from sending out in operation with damping
It is raw to shake, reduce situations such as opening suddenly when carrying.
The bottom of the slot 8 is equipped with groove 14 corresponding with bolt.
After bolt 6 is inserted into slot 8, behind be affixed with the groove 14 of 8 bottom of slot, before stopped by corner block 15, reduce
Shaking of the bolt 6 in slot 8.
Embodiment 2
The structure of the present embodiment is substantially the same manner as Example 1, is different in, and the upper terraced body and descending stair body are therefrom interrupted
Open, the connection type of gap is identical as the connection type of upper terraced body and descending stair body, upper ladder body and descending stair status at 4 groups of doublings,
It can be transported using ordinary passenger car.
Structure of the invention is reasonable, and upper ladder body and descending stair body can fold, and is readily transported and places；Upper ladder body and descending stair body can
To be folded into any common angle and fixation, convenient for indoor use；Upper ladder body, descending stair body and stull use magnesium alloy material,
Structure is firmer, technical problem present in the effective solution insulating ladder of the prior art.
Embodiment 3
The invention further relates to the improvement to upper terraced body, descending stair body and stull material, the upper terraced body, descending stair body and stull are all made of
Magnesium alloy material, specifically, the magnesium alloy material are prepared according to following technique:
100 parts of magnesium ingots, 20 parts of magnesium manganese intermediate alloy MgMn5,10 parts of copper magnesium intermediate alloy CuMg10,8 parts of magnesium are taken according to parts by weight
Zirconium intermediate alloy MgZr30,5 parts of magnesium yttrium intermediate alloy MgY30；
Magnesium ingot is taken, under argon gas protection, 750 DEG C is warming up to after magnesium ingot is melted, Mg melt is obtained, then successively adds magnesium
Manganese intermediate alloy MgMn5, copper magnesium intermediate alloy CuMg10, Mg-Zr intermediate alloy MgZr30, magnesium yttrium intermediate alloy MgY30 continue
30min is refined under argon gas protection, obtains aluminium alloy；
Aluminium alloy is poured into mold, natural cooling, demoulding obtains ingot casting；Ingot casting is put into heating furnace, is warming up to 350
DEG C, 60min is kept the temperature, 50 DEG C of quenching-in water is then put into；Quenched ingot casting is put into aging furnace, is warming up to 180
DEG C, keep the temperature 3h, cooled to room temperature after coming out of the stove；Then by press machine extrusion forming to get.
Embodiment 4
Properties of Magnesium Alloy test of the present invention:
Control group is set:
Control group 1:AE44 magnesium alloy；
Control group 2: magnesium yttrium intermediate alloy is not added, remaining is the same as embodiment 3；
Control group 3: magnesium manganese intermediate alloy is not added, remaining is the same as embodiment 3；
Control group 4: copper magnesium intermediate alloy is not added, remaining is the same as embodiment 3.
One, hardness determination: the hardness of HR-150A detection each sample；Specifically it is shown in Table 1:
Table 1
| Group | Hardness number (HRC) |
| Embodiment 3 | 85.7 |
| Control group 1 | 70.1 |
| Control group 2 | 79.8 |
| Control group 3 | 66.3 |
| Control group 4 | 75.4 |
Two, tensile property: WDW Series Microcomputer controls the test of electronic universal tester tensile property；Specifically it is shown in Table 2:
Table 2
| Group | Tensile strength Mpa |
| Embodiment 3 | 149.3 |
| Control group 1 | 121.5 |
| Control group 2 | 129.4 |
| Control group 3 | 113.7 |
| Control group 4 | 130.9 |
Three, corrosion resistance is tested:
According to GB10124-1988 metal material laboratory homogeneous corrosion total immersion test method, by examination prepared in the above embodiments
Sample is tiltedly stood up in 3.5%NaCl solution, is taken out after 4 days and is removed specimen surface with CrO3+AgNO3+Ba (NO3) 2+ distilled water
Then corrosion product is cleaned with acetone and absolute alcohol again, survey corrosion rate (mm/a).
Alloy corrosion rate obtained in the various embodiments described above is as shown in table 3.
Table 3
| Group | Corrosion rate (mm/a) |
| Embodiment 3 | 0.145 |
| Control group 1 | 0.236 |
| Control group 2 | 0.208 |
| Control group 3 | 0.169 |
| Control group 4 | 0.174 |
Conclusion: mechanical strong by table 1-3 it is found that the present invention improves Properties of Magnesium Alloy by the intermediate alloy of addition other elements
Degree, hardness and corrosion resistance greatly promote.
Obviously, embodiments described above is a part of the embodiment of the present invention, instead of all the embodiments.Based on this
Embodiment in invention, every other reality obtained by those of ordinary skill in the art without making creative efforts
Example is applied, shall fall within the protection scope of the present invention.
Claims (7)
1. a kind of electric power special isolation ladder, it includes the upper terraced body and descending stair body for being respectively equipped with stull；It is characterized in that the upper ladder
Body is connected with descending stair body by connecting plate；The connecting plate is located at the inside of terraced body and descending stair body；Connecting plate passes through respectively to be turned
Axis and upper terraced body and descending stair body are rotatablely connected；Corresponding bolt and slot are equipped between the upper terraced body and descending stair body；It is described to insert
The side of slot is equipped with slideway；The corner block being slidably connected is equipped in the slideway；The lateral surface of the corner block is inclined-plane；It is described
The spring of elastic connection is equipped with behind corner block；The corner block is equipped with handle；The upper terraced body, descending stair body and stull
Outer surface is brushed with anti-corrosion insulation paint respectively；Insulation sleeve is cased with outside the upper terraced body and descending stair body；The outer surface cover of the stull
There is Anti-slip cover.
2. a kind of electric power special isolation ladder according to claim 1, it is characterized in that: the two sides of the upper terraced body and descending stair body
It is respectively equipped with positioning plate and positioning pin；One end of the positioning plate is rotatablely connected with upper ladder；The positioning plate is equipped with one
The clamping groove of row's connection positioning pin；The clamping groove is semi-circular recesses, and the inside of the positioning pin is equipped with a circle concave ring, clamping
Slot snaps on concave ring.
3. a kind of electric power special isolation ladder according to claim 1, it is characterized in that: the upper terraced body, descending stair body and stull
It is all made of magnesium alloy material, centre is hollow hollow cavity；The upper terraced body and descending stair in other component junctions into
Row thickening processing.
4. a kind of electric power special isolation ladder according to claim 1, it is characterized in that: the connecting plate and upper terraced body and descending stair
The shaft of body connection will not be rotated with damping, connecting plate and upper terraced body and descending stair body because of self gravity, and not had in addition to rotation
There are other directions to shake.
5. a kind of electric power special isolation ladder according to claim 1, it is characterized in that: the bottom of the slot is equipped with and bolt
Corresponding groove.
6. a kind of electric power special isolation ladder according to claim 1, it is characterized in that: the upper terraced body and descending stair body are from centre
It disconnects, the connection type of gap is identical as the connection type of upper terraced body and descending stair body, and upper ladder body and descending stair status are at 4 groups pairs
Folding.
7. a kind of electric power special isolation ladder according to claim 3, it is characterized in that: the magnesium alloy material is according to following work
Skill is prepared:
1) 100 parts of magnesium ingots, 20 parts of magnesium manganese intermediate alloy MgMn5,10 parts of copper magnesium intermediate alloy CuMg10,8 parts are taken according to parts by weight
Mg-Zr intermediate alloy MgZr30,5 parts of magnesium yttrium intermediate alloy MgY30；
2) magnesium ingot is taken, under argon gas protection, 750 DEG C is warming up to after magnesium ingot is melted, Mg melt is obtained, then successively adds
Magnesium manganese intermediate alloy MgMn5, copper magnesium intermediate alloy CuMg10, Mg-Zr intermediate alloy MgZr30, magnesium yttrium intermediate alloy MgY30, after
Continue and refine 30min under argon gas protection, obtains aluminium alloy；
3) aluminium alloy is poured into mold, natural cooling, demoulding obtains ingot casting；Ingot casting is put into heating furnace, is warming up to
350 DEG C, 60min is kept the temperature, 50 DEG C of quenching-in water is then put into；Quenched ingot casting is put into aging furnace, is warming up to
180 DEG C, keep the temperature 3h, cooled to room temperature after coming out of the stove；Then by press machine extrusion forming to get.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811616601.XA CN109505506B (en) | 2018-12-28 | 2018-12-28 | Special insulating ladder of electric power |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811616601.XA CN109505506B (en) | 2018-12-28 | 2018-12-28 | Special insulating ladder of electric power |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109505506A true CN109505506A (en) | 2019-03-22 |
| CN109505506B CN109505506B (en) | 2020-04-07 |
Family
ID=65755992
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811616601.XA Expired - Fee Related CN109505506B (en) | 2018-12-28 | 2018-12-28 | Special insulating ladder of electric power |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109505506B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111963047A (en) * | 2020-08-17 | 2020-11-20 | 贵州电网有限责任公司 | Special ladder is maintained at terminal |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0090198A2 (en) * | 1982-03-26 | 1983-10-05 | Günther Krause | Folding multipurpose ladder |
| CN103147681A (en) * | 2013-03-28 | 2013-06-12 | 河南省电力公司信阳供电公司 | Multifunctional meter reading ladder |
| CN202990824U (en) * | 2012-12-31 | 2013-06-12 | 重庆独到建材有限公司 | Foldable ladder |
| CN203230335U (en) * | 2013-03-14 | 2013-10-09 | 洛阳理工学院 | Air conditioner mounting ladder |
| CN205918355U (en) * | 2016-06-15 | 2017-02-01 | 汪洋 | Ladder is attacked in folding vehicle anti -hijacking |
| CN108715963A (en) * | 2018-05-21 | 2018-10-30 | 山东银光钰源轻金属精密成型有限公司 | One kind is containing Y, Nd magnesium-rare earth and preparation method thereof |
-
2018
- 2018-12-28 CN CN201811616601.XA patent/CN109505506B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0090198A2 (en) * | 1982-03-26 | 1983-10-05 | Günther Krause | Folding multipurpose ladder |
| CN202990824U (en) * | 2012-12-31 | 2013-06-12 | 重庆独到建材有限公司 | Foldable ladder |
| CN203230335U (en) * | 2013-03-14 | 2013-10-09 | 洛阳理工学院 | Air conditioner mounting ladder |
| CN103147681A (en) * | 2013-03-28 | 2013-06-12 | 河南省电力公司信阳供电公司 | Multifunctional meter reading ladder |
| CN205918355U (en) * | 2016-06-15 | 2017-02-01 | 汪洋 | Ladder is attacked in folding vehicle anti -hijacking |
| CN108715963A (en) * | 2018-05-21 | 2018-10-30 | 山东银光钰源轻金属精密成型有限公司 | One kind is containing Y, Nd magnesium-rare earth and preparation method thereof |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111963047A (en) * | 2020-08-17 | 2020-11-20 | 贵州电网有限责任公司 | Special ladder is maintained at terminal |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109505506B (en) | 2020-04-07 |
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