CN107822364A - A kind of work high above the ground spade stool - Google Patents
A kind of work high above the ground spade stool Download PDFInfo
- Publication number
- CN107822364A CN107822364A CN201711015751.0A CN201711015751A CN107822364A CN 107822364 A CN107822364 A CN 107822364A CN 201711015751 A CN201711015751 A CN 201711015751A CN 107822364 A CN107822364 A CN 107822364A
- Authority
- CN
- China
- Prior art keywords
- support bar
- curved handle
- hanging point
- safety fastener
- stool
- 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.)
- Granted
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Classifications
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47C—CHAIRS; SOFAS; BEDS
- A47C12/00—Step-stools
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G1/00—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines
- H02G1/02—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines for overhead lines or cables
Landscapes
- Ladders (AREA)
Abstract
The invention belongs to step on bar operation, the technical field of tools of unit for operation on ladder, a kind of more particularly to work high above the ground spade stool, including support bar and shovel head, angle adjusting mechanism is set between the support bar and shovel head, the support bar sets the first safety fastener hanging point close to the top of angle adjusting mechanism, the lower end of the support bar sets curved handle, angle between the inner face of the curved handle and the inner face of support bar is 120 135 °, second safety fastener hanging point is set on the curved handle, safety belt is respectively provided with the first safety fastener hanging point and the second safety fastener hanging point, the both ends of the curved handle are respectively provided with a supporting mechanism.The present invention serves not only as spade use by setting support bar, shovel head and angle adjusting mechanism, and ascending stool, ladder auxiliary can be used as to take stool and use, simple to operate and portable, practical.
Description
Technical field
The invention belongs to step on bar operation, unit for operation on ladder technical field of tools, a kind of more particularly to work high above the ground spade stool.
Background technology
With the continuous quickening of China's economic technology, also progressively increasing for the demand of electric power, high pressure is to supply for distribution
Most common in distribution system, because road is remote, condition of work is complicated, exposes to the sun and rain exposed for electrical equipment in its circuit,
Aging circuit, circuit damage etc. often occur, it is necessary to routine test, inspection and maintenance, so powered work high above the ground is electric power public affairs
Department is to action method common in overhaul of the equipments, test process, due to using angle steel on shaft tower, in time work high above the ground
It is tired out that generation body is easy in journey, causes mentality not concentrated, the risk that falling from high altitude be present.
Authorization Notice No. CN204048796U discloses a kind of steel pipe pole work high above the ground stool, on the bending inner face of J shape bars
Provided with rubber sliding-proof face, one end of the straight rod end connection straight-bar of J-shaped bar, being provided with the corresponding J-shaped bar bending of straight-bar can
Retaining mechanism flexible towards bending and with sheet rubber, one end of connecting rod are fixedly connected with straight-bar, on the other end of connecting rod
Portion is provided with seat, and the upper end of bearing diagonal is connected to the other end bottom of connecting rod, and bearing diagonal lower end is outer with bottom crescent push rod
Cambered surface connects, and bottom crescent push rod corresponds to the straight-bar on top；The utility model catches on steel pipe pole using J-shaped bar, by the bottom moon
Thread form push rod forms support, facilitates electrician and is sitting in an operation；The deficiency of the structure is pointed out to be：Only pass through J-shaped bar and crescent moon
Shape push rod is fixed with electric pole, first, security is insufficient, and the foot of operating personnel can nowhere put, and cause comfortableness not
Foot.
A kind of portable power pylon operation stools of Authorization Notice No. CN204260293U, are related to a kind of special work of electric tower
Industry stool, fixture block are fixed in the bottom surfaces of bench, and the lower surface of fixture block and clamp is connected by hinge, and clamp one is corresponded in fixture block
The interface top of side is recessed provided with " factory " font, and fixture block docking is connected behind the hole that at least two bolts are set through clamp bottom
The screw set on face, " factory " font between fixture block and clamp is recessed to form the interface arrangment of electric tower, on brace
End is fixed in the bottom surfaces of fixture block, and cross bar is provided with brace lower end；Although the structure devises the cross bar of foot support, still
The problem of disassembly process is complicated, takes time and effort be present, practicality is not strong.
The content of the invention
In view of this, the purpose of the present invention is in view of the shortcomings of the prior art, there is provided a kind of work high above the ground spade stool, is passed through
Support bar, shovel head and angle adjusting mechanism are set, serve not only as spade use, and ascending stool, ladder can be used as to aid in
Stool is taken to use, it is simple to operate and portable, it is practical.
To reach above-mentioned purpose, the present invention uses following technical scheme：
A kind of work high above the ground spade stool, including support bar and shovel head, angular adjustment is set between the support bar and shovel head
Mechanism, the support bar set the first safety fastener hanging point close to the top of angle adjusting mechanism, and the lower end of the support bar is set
Curved handle, the angle between the upper surface of the curved handle and the inner face of support bar are 120-135 °, the arc hand
Second safety fastener hanging point is set on handle, safety belt is respectively provided with the first safety fastener hanging point and the second safety fastener hanging point, it is described
The both ends of curved handle are respectively provided with a supporting mechanism.
Further, the angle adjusting mechanism includes fixing axle, rotating shaft and the bearing pin of rotation connection, the fixing axle
Both ends are respectively fixedly connected with a fixed disk, and two fixed disks are circumferentially respectively provided with multiple first through hole, set in the rotating shaft
Second through hole, the bearing pin run through first through hole and the second through hole, and the support bar is fixedly connected with fixing axle, the shovel head
It is fixedly connected with rotating shaft.
Further, the supporting mechanism is V-arrangement fulcrum.
Further, the supporting mechanism is hook.
Further, pedal is set on the curved handle.
Further, the curved handle side end face sets anti-skid rubber cushion.
Further, second through hole sets internal thread, and the bearing pin is wing nut.
Further, intubation, the intubation and support bar socket connection, the support bar are fixedly connected with the fixing axle
With multiple spacing holes are set in intubation, the bearing of trend of multiple spacing holes is parallel with the axis of support bar, in the spacing hole
Spacer pin is set, and support bar and intubation are fixed by spacer pin.
The beneficial effects of the invention are as follows：
1. the present invention is divided into three working conditions when in use：
1）Used separately as spade：Shovel head and support bar are adjusted in same level by angle adjusting mechanism, so
The position of shovel head is defined by bearing pin afterwards, now functions as spade use, and curved handle is beneficial to as grasp-point
Shovel grass, bulldozing uses；
2）Arrange in pairs or groups and use with electric pole：Because this structure overall weight is smaller, it is easy to carry during ascending a height, electric pole is arrived when climbing
Behind operating point, the inner face of curved handle is vertically adjacent to the outer wall in electric pole, and uses of seat belts and 1 to 2 is wound on electric pole
Circle, then the both ends of safety belt are snapped in the second safety fastener hanging point, complete the fixation of lower end of the present invention；Due to support bar with
120-135 ° of obtuse angle between curved handle be present, now support bar is now hung in extending obliquely close to the first safety fastener
The safety belt of the circle of electric pole outer wall winding 1 to 2 of point position, and the both ends of the safety belt are snapped over into the first safety fastener hanging point, it is complete
Into the fixation of upper end of the present invention；Finally, shovel head is adjusted to being parallel to each other with horizontal plane or interior by angle adjusting mechanism
Low outer high structure, now the present apparatus used as ascending stool；It is noted that need to do according to safety code in operation process
Good private insurance measure.
3）Arrange in pairs or groups and use with ladder：Because ladder does not take structure, long-time standing at work can cause tired sense, will
The stull of the supporting mechanism and ladder of the present invention is hooked, and supporting mechanism can use V-arrangement fulcrum or hook, then will peace
Full band is fastened in the stull above supporting mechanism, and safety belt both ends are snapped in the second safety fastener hanging point, is completed
The fixation of lower end of the present invention；Due to 120-135 ° of obtuse angle between support bar and curved handle be present, now support bar is in oblique
Upper extension, the safety that now winding 1 to 2 is enclosed in the stull close to the ladder top or top of the first safety fastener hanging point position
Band, and the both ends of the safety belt are snapped over into the first safety fastener hanging point, complete the fixation of upper end of the present invention；Finally, angle is passed through
Governor motion adjusts shovel head to being parallel to each other with horizontal plane or interior low outer high structure, and now the present apparatus is as ladder
Auxiliary is taken stool and used；It is noted that need to carry out private insurance measure according to safety code in operation process.
2. shovel head, support bar and curved handle are adopted as, manganese steel toughness is strong, light, and angle regulator is gear
Steel, possess good intensity, hardness and toughness, surface abrasion resistance and center portion has good tough ballistic.
3. setting pedal on curved handle, this structure design provides foot support space for staff, and increase high-altitude is made
Comfortableness during industry.
4. curved handle side end face sets anti-skid rubber cushion, anti-skid rubber cushion is the composite of kind of rubber and carbon black, by force
Degree and wearability are big, and access times are more.
5. the second through hole sets internal thread, bearing pin is wing nut, this structure design when in use, by operating butterfly spiral shell
Mother can realize the quick fixation between angle adjusting mechanism and rotating shaft, and wing nut is fixed with shaft thread, is effectively carried
Stability in high shovel head fixation procedure.
6. being used to adapt to the operating personnel of different heights, the present invention is fixedly connected with intubation, intubation and branch in fixing axle
Multiple spacing holes, the bearing of trend of multiple spacing holes and the axis of support bar are set in strut socket connection, support bar and intubation
It is parallel, in use, according to itself height（It can be trampled to pedal and be defined by foot）, adjust the length in intubation insertion support bar
Degree, and the spacing hole by spacer pin on support bar and intubation, support bar and intubation are fixed by spacer pin, so as to suitable
The staff of different heights is answered to use.
Brief description of the drawings
Fig. 1 is the structural representation of embodiment one；
Fig. 2 is Fig. 1 labels A mplifying structure schematic diagram；
Fig. 3 is Fig. 1 left side structure schematic diagram；
Fig. 4 is that shovel head is used for the structural representation for taking state in Fig. 3；
Fig. 5 is the structural representation of curved handle in embodiment one；
Fig. 6 is the structural representation of the supporting mechanism of embodiment two；
Fig. 7 is the structural representation of the bearing pin of embodiment three；
Fig. 8 is the structural representation of example IV angle adjusting mechanism.
1- support bars, 2- shovel heads, 3- the first safety fastener hanging points, 4- curved handles, 5- the second safety fastener hanging points, 6- safety
Band, 7-V shape fulcrums, 8- pedals, 9- fixing axles, 10- rotating shafts, 11- bearing pins, 12- fixed disks, 13- first through hole, the anti-skidding rubbers of 14-
Rubber cushion, 15- hooks, 16- intubations, 17- spacing holes, 18- spacer pins.
Embodiment
The invention will be further described with reference to the accompanying drawings and examples.
Embodiment one
As shown in Figures 1 to 5, the present invention includes support bar 1 and shovel head 2, sets angle to adjust between support bar 1 and shovel head 2
Mechanism is saved, support bar 1 sets the first safety fastener hanging point 3 close to the top of angle adjusting mechanism, and the first safety fastener hanging point 3 uses bar
Shape structure, the lower end of support bar 1 are fixedly connected with curved handle 4, and the inner face of curved handle 4 and the outer wall of electric pole match, and
And the inner face fixed setting anti-skid rubber cushion 14 of curved handle 4, the upper surface of curved handle 4 and the inner face of support bar 1 it
Between angle be 120 °, on curved handle 4 set two the second safety fastener hanging points 5, the second safety fastener hanging point 5 use poroid knot
Safety belt 6 is respectively provided with structure, the first safety fastener hanging point 3 and the second safety fastener hanging point 5, the both ends of curved handle 4 are respectively provided with one
Supporting mechanism, supporting mechanism are V-arrangement fulcrum 7, pedal 8 are set on curved handle 4, angle adjusting mechanism includes consolidating for rotation connection
Dead axle 9, rotating shaft 10 and bearing pin 11, the both ends of fixing axle 9 are respectively fixedly connected with a fixed disk 12, and two fixed disks 12 are circumferentially
Multiple first through hole 13 are respectively provided with, second through hole is set in rotating shaft 10（It is not shown）, bearing pin 11 runs through first through hole 13 and second
Through hole, support bar 1 are fixedly connected with fixing axle 9, and shovel head 2 is fixedly connected with rotating shaft 10.
In the present embodiment, Fig. 3 structure can be used for the functions such as spade, and Fig. 4 function can be used for electric pole and step ladder
Auxiliary take stool.
Embodiment two
With reference to Fig. 1 to Fig. 6, the present invention includes support bar 1 and shovel head 2, angular adjustment is set between support bar 1 and shovel head 2
Mechanism, support bar 1 set the first safety fastener hanging point 3 close to the top of angle adjusting mechanism, and the first safety fastener hanging point 3 uses strip
Structure, the lower end of support bar 1 are fixedly connected with curved handle 4, and the inner face of curved handle 4 and the outer wall of electric pole match, arc
Angle between the upper surface of handle 4 and the inner face of support bar 1 is 135 °, and two the second safety fasteners are set on curved handle 4
Hanging point 5, the second safety fastener hanging point 5 use cavernous structure, peace are respectively provided with the first safety fastener hanging point 3 and the second safety fastener hanging point 5
Full band 6, the both ends of curved handle 4 are respectively provided with a supporting mechanism, and supporting mechanism is hook 15, and pedal is set on curved handle 4
8, angle adjusting mechanism includes fixing axle 9, rotating shaft 10 and the bearing pin 11 of rotation connection, and the both ends of fixing axle 9 are respectively fixedly connected with
One fixed disk 12, two fixed disks 12 are circumferentially respectively provided with multiple first through hole 13, the second through hole are set in rotating shaft 10（Figure is not
Show）, bearing pin 11 runs through the through hole of first through hole 13 and second, and support bar 1 is fixedly connected with fixing axle 9, and shovel head 2 is solid with rotating shaft 10
Fixed connection.
The present embodiment and the structure of embodiment one are essentially identical, unlike：As shown in figure 5, supporting mechanism is hook 15,
Hook 15 uses J-shaped hook or L-shaped hook, the step ladder available for square stull or circular stull.
Embodiment three
With reference to Fig. 1 to Fig. 3, Fig. 7, the present invention includes support bar 1 and shovel head 2, angle is set between support bar 1 and shovel head 2
Governor motion, support bar 1 set the first safety fastener hanging point 3 close to the top of angle adjusting mechanism, and the first safety fastener hanging point 3 uses
List structure, the lower end of support bar 1 are fixedly connected with curved handle 4, the upper surface of curved handle 4 and the inner face of support bar 1 it
Between angle be 120 °, on curved handle 4 set two the second safety fastener hanging points 5, the second safety fastener hanging point 5 use poroid knot
Safety belt 6 is respectively provided with structure, the first safety fastener hanging point 3 and the second safety fastener hanging point 5, the both ends of curved handle 4 are respectively provided with one
Supporting mechanism, supporting mechanism are hook 15, pedal 8 are set on curved handle 4, angle adjusting mechanism includes the fixation of rotation connection
Axle 9, rotating shaft 10 and bearing pin 11, bearing pin 11 use wing nut, and the both ends of fixing axle 9 are respectively fixedly connected with a fixed disk 12,
Two fixed disks 12 are circumferentially respectively provided with multiple first through hole 13, and the second through hole is set in rotating shaft 10（It is not shown）, bearing pin 11 passes through
The through hole of first through hole 13 and second is worn, support bar 1 is fixedly connected with fixing axle 9, and shovel head 2 is fixedly connected with rotating shaft 10
The present embodiment and the structure of embodiment two are essentially identical, unlike：As shown in fig. 6, the second through hole in rotating shaft 10 is set
Put internal thread（It is not shown）, bearing pin 11 uses wing nut, can not only realize fast between angle adjusting mechanism and rotating shaft 10
Speed is fixed, and wing nut is fixed with shaft thread, improves the stability in shovel head fixation procedure.
Example IV
The present embodiment and the structure of embodiment two are essentially identical, unlike：As shown in figure 8, support bar 1 is hollow structure, Gu
Intubation 16, intubation 16 and the socket connection of support bar 1 are fixedly connected with dead axle 9, spacing hole 17 is set in support bar 1 and intubation 16,
Spacing hole 17 in intubation 16 is multiple, and the bearing of trend of multiple spacing holes 17 is parallel with the axis of intubation 16, spacing hole 17
Interior setting spacer pin 18, support bar 1 and intubation 16 are fixed by spacer pin 18；In use, according to itself height（With foot
It can trample to pedal and be defined）, adjustment is intubated the length in 16 insertion support bars 1, and spacer pin 18 through support bar 1 and is inserted
Spacing hole 17 on pipe 16, support bar 1 and intubation 16 are fixed by spacer pin, so as to adapt to the staff of different heights
Use.
Finally illustrate, the above embodiments are merely illustrative of the technical solutions of the present invention and it is unrestricted, this area is common
Other modifications or equivalent substitution that technical staff is made to technical scheme, without departing from technical solution of the present invention
Spirit and scope, all should cover among scope of the presently claimed invention.
Claims (6)
- A kind of 1. work high above the ground spade stool, it is characterised in that：Including support bar and shovel head, between the support bar and shovel head Angle adjusting mechanism is set, and the support bar sets the first safety fastener hanging point, the support close to the top of angle adjusting mechanism The lower end of bar sets curved handle, and the angle between the inner face of the curved handle and the inner face of support bar is 120- 135 °, the second safety fastener hanging point is set, on the curved handle on the first safety fastener hanging point and the second safety fastener hanging point Safety belt is set, and the both ends of the curved handle are respectively provided with a supporting mechanism.
- A kind of 2. work high above the ground spade stool according to claim 1, it is characterised in that：The angle adjusting mechanism includes turning Fixing axle, rotating shaft and the bearing pin of dynamic connection, the both ends of the fixing axle are respectively fixedly connected with a fixed disk, two fixed disk edges Multiple first through hole circumferentially are respectively provided with, the second through hole is set in the rotating shaft, the bearing pin runs through first through hole and the second through hole, The support bar is fixedly connected with fixing axle, and the shovel head is fixedly connected with rotating shaft.
- A kind of 3. work high above the ground spade stool according to claim 1, it is characterised in that：The supporting mechanism is V-arrangement fulcrum.
- A kind of 4. work high above the ground spade stool according to claim 1, it is characterised in that：The supporting mechanism is hook.
- A kind of 5. work high above the ground spade stool according to claim 1, it is characterised in that：Pin is set on the curved handle Pedal.
- A kind of 6. work high above the ground spade stool according to claim 1, it is characterised in that：The curved handle side end face is set Anti-skid rubber cushion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711015751.0A CN107822364B (en) | 2017-10-25 | 2017-10-25 | Spade stool for working aloft |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711015751.0A CN107822364B (en) | 2017-10-25 | 2017-10-25 | Spade stool for working aloft |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107822364A true CN107822364A (en) | 2018-03-23 |
| CN107822364B CN107822364B (en) | 2020-11-10 |
Family
ID=61649386
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711015751.0A Active CN107822364B (en) | 2017-10-25 | 2017-10-25 | Spade stool for working aloft |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107822364B (en) |
Citations (14)
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|---|---|---|---|---|
| EP1099607A1 (en) * | 1998-09-17 | 2001-05-16 | Arjuna Indraeswaran Rajasingham | Easy ejector with skeletal crash safety beam |
| JP2003275333A (en) * | 2002-03-26 | 2003-09-30 | Fujii Denko Co Ltd | Safety belt |
| US20060043776A1 (en) * | 2002-04-01 | 2006-03-02 | Rajasingham Arjuna I | Easy ejector seat with skeletal crash safety beam |
| CN203782765U (en) * | 2014-04-22 | 2014-08-20 | 国网山东禹城市供电公司 | Multifunctional shovel for electric power |
| CN204048796U (en) * | 2014-06-19 | 2014-12-31 | 国网河南孟津县供电公司 | A kind of work high above the ground stool being applicable to steel pipe pole |
| CN104260646A (en) * | 2014-10-13 | 2015-01-07 | 长沙中联消防机械有限公司 | Angle adjustment mechanism for seat, seat and overhead working truck |
| CN104288970A (en) * | 2014-10-08 | 2015-01-21 | 国家电网公司 | Working seat for working on pole |
| CN204260293U (en) * | 2014-11-17 | 2015-04-15 | 国网河南新安县供电公司 | A kind of portable power pylon operation stool |
| CN105816999A (en) * | 2016-03-28 | 2016-08-03 | 国网山东省电力公司章丘市供电公司 | Electric pole height climbing operation auxiliary device |
| CN106025960A (en) * | 2016-05-31 | 2016-10-12 | 国网山东省电力公司菏泽供电公司 | Insulating protective box for live working and installation device and installation method of insulating protective box |
| CN106168111A (en) * | 2016-08-01 | 2016-11-30 | 国网浙江省电力公司金华供电公司 | Equipotential live line work special isolation hanging ladder |
| CN106312952A (en) * | 2016-08-26 | 2017-01-11 | 深圳市阿尔金贸易有限公司 | Multifunctional outdoor shovel |
| CN206081512U (en) * | 2016-10-21 | 2017-04-12 | 姚万欣 | Electrician uses pole -climbing device |
| JP2017071979A (en) * | 2015-10-08 | 2017-04-13 | 日立建機株式会社 | Construction machine |
-
2017
- 2017-10-25 CN CN201711015751.0A patent/CN107822364B/en active Active
Patent Citations (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1099607A1 (en) * | 1998-09-17 | 2001-05-16 | Arjuna Indraeswaran Rajasingham | Easy ejector with skeletal crash safety beam |
| JP2003275333A (en) * | 2002-03-26 | 2003-09-30 | Fujii Denko Co Ltd | Safety belt |
| US20060043776A1 (en) * | 2002-04-01 | 2006-03-02 | Rajasingham Arjuna I | Easy ejector seat with skeletal crash safety beam |
| CN203782765U (en) * | 2014-04-22 | 2014-08-20 | 国网山东禹城市供电公司 | Multifunctional shovel for electric power |
| CN204048796U (en) * | 2014-06-19 | 2014-12-31 | 国网河南孟津县供电公司 | A kind of work high above the ground stool being applicable to steel pipe pole |
| CN104288970A (en) * | 2014-10-08 | 2015-01-21 | 国家电网公司 | Working seat for working on pole |
| CN104260646A (en) * | 2014-10-13 | 2015-01-07 | 长沙中联消防机械有限公司 | Angle adjustment mechanism for seat, seat and overhead working truck |
| CN204260293U (en) * | 2014-11-17 | 2015-04-15 | 国网河南新安县供电公司 | A kind of portable power pylon operation stool |
| JP2017071979A (en) * | 2015-10-08 | 2017-04-13 | 日立建機株式会社 | Construction machine |
| CN105816999A (en) * | 2016-03-28 | 2016-08-03 | 国网山东省电力公司章丘市供电公司 | Electric pole height climbing operation auxiliary device |
| CN106025960A (en) * | 2016-05-31 | 2016-10-12 | 国网山东省电力公司菏泽供电公司 | Insulating protective box for live working and installation device and installation method of insulating protective box |
| CN106168111A (en) * | 2016-08-01 | 2016-11-30 | 国网浙江省电力公司金华供电公司 | Equipotential live line work special isolation hanging ladder |
| CN106312952A (en) * | 2016-08-26 | 2017-01-11 | 深圳市阿尔金贸易有限公司 | Multifunctional outdoor shovel |
| CN206081512U (en) * | 2016-10-21 | 2017-04-12 | 姚万欣 | Electrician uses pole -climbing device |
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| Publication number | Publication date |
|---|---|
| CN107822364B (en) | 2020-11-10 |
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