CN209908379U - Multifunctional ladder - Google Patents

Multifunctional ladder Download PDF

Info

Publication number
CN209908379U
CN209908379U CN201821762822.3U CN201821762822U CN209908379U CN 209908379 U CN209908379 U CN 209908379U CN 201821762822 U CN201821762822 U CN 201821762822U CN 209908379 U CN209908379 U CN 209908379U
Authority
CN
China
Prior art keywords
ladder
ladder frame
frame
platform
section
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.)
Active
Application number
CN201821762822.3U
Other languages
Chinese (zh)
Inventor
张天豪
王林海
何成章
谷雨
李中恩
陈凯
沈国欣
周晓军
黄仕
黄杰
周林
黄欢
金喆
郑克强
张岳贵
项羽伟
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
State Grid Corp of China SGCC
State Grid Zhejiang Electric Power Co Ltd
Wenzhou Power Supply Co of State Grid Zhejiang Electric Power Co Ltd
Original Assignee
State Grid Corp of China SGCC
State Grid Zhejiang Electric Power Co Ltd
Wenzhou Power Supply Co of State Grid Zhejiang Electric Power Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by State Grid Corp of China SGCC, State Grid Zhejiang Electric Power Co Ltd, Wenzhou Power Supply Co of State Grid Zhejiang Electric Power Co Ltd filed Critical State Grid Corp of China SGCC
Priority to CN201821762822.3U priority Critical patent/CN209908379U/en
Application granted granted Critical
Publication of CN209908379U publication Critical patent/CN209908379U/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Landscapes

  • Ladders (AREA)

Abstract

The utility model relates to a multifunctional ladder, which comprises a ladder body, wherein the ladder body comprises a first ladder frame, a second ladder frame and a connecting platform which is arranged at the top of the first ladder frame and the second ladder frame and is used for connecting the first ladder frame and the second ladder frame; the second ladder frame is provided with an expansion joint which can adjust the height of the second ladder frame, and a switching mechanism which can switch the second ladder frame into a herringbone ladder or a straight ladder. The utility model discloses be convenient for electrician's multiple environment climb dress table work, connection platform provides a safe support environment for electrician, and the shifter can carry out double ladder or vertical ladder conversion work with the second ladder frame to combine the telescopic joint cooperation to adjust, be applicable to various uneven operational environment, effectively solve current ordinary ladder and be difficult to the problem at stair step side-mounting table case.

Description

Multifunctional ladder
Technical Field
The utility model relates to an use multi-functional ladder of the safe operation of climbing of being convenient for on stair.
Background
Ancient cloud: "the worker wants to do his work, he must first use his tool", and whether the worker has the proper tool during the work directly affects the safety and work efficiency of the worker. How to improve the existing tools to improve the working efficiency is a crucial problem in the current work production. Although a plurality of tools are used in production at present, the specially designed tools are still lacked for construction operation under certain special environments, great difficulty is brought to production and construction, and certain potential safety hazards exist in the construction process.
In the power industry, with the popularization of a meter system of one household, a large number of users declare more and more meters, the meter installing and electricity connecting work task is busy, in the meter installing process, people find that meter installing personnel can meet the condition that the position of a meter box is on the side face of a stair step frequently, and because the stair step is narrow, the meter is installed on the step, the common ladder stool or the bamboo ladder is unsafe, and even if the people hold the ladder, the workers still have the lifting core, so that the large potential safety hazard exists in the whole meter installing process, and meanwhile, the reliability of the electric meter wiring is difficult to guarantee. It is therefore desirable to design a safer ladder for use instead.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is exactly to provide a multifunctional ladder, solve the problem that current ordinary ladder is difficult to at the step side-mounting table case of stair.
In order to solve the technical problem, the utility model discloses a realize through following technical scheme:
a multifunctional ladder comprises a ladder body, wherein the ladder body comprises a first ladder frame, a second ladder frame and a connecting platform which is arranged at the tops of the first ladder frame and the second ladder frame and used for connecting the first ladder frame and the second ladder frame; the second ladder frame is provided with an expansion joint which can adjust the height of the second ladder frame, and a switching mechanism which can switch the second ladder frame into a herringbone ladder or a straight ladder.
By adopting the technical scheme, the ladder body is arranged in a multi-ladder-frame structure, so that various working requirements are met, and the climbing work of electricians is facilitated; the connecting platform is arranged, so that a safe supporting environment is provided for electricians; the conversion mechanism can convert the second ladder frame into a herringbone ladder or a straight ladder and is matched with the expansion joint for adjustment, so that the double-ladder type ladder is suitable for various uneven working environments and meets working requirements; when the ladder is in an uneven working environment such as a stair, the second ladder frame is switched to a herringbone ladder mode through the switching mechanism, the height of the second ladder frame is adjusted by combining the telescopic joint, the working requirements of the working environment with different heights are met, and the ladder body is stable in structure and safe to use; when the ladder body was in horizontal plane operational environment, then the accessible shifter switched over the second ladder frame to the vertical ladder mode, and the cooperation telescopic joint carries out altitude mixture control to the second ladder frame, satisfies the work of the operation of ascending a height, and factor of safety is high.
Preferably, the second ladder frame comprises an upper ladder frame and a lower ladder frame, and the switching mechanism is arranged between the upper ladder frame and the lower ladder frame.
Through adopting above-mentioned technical scheme, set up the segmentation of second ladder frame, the installation is convenient with the dismantlement, and is convenient for buckle the second ladder frame, and domatic operations of ascending a height such as stair of being convenient for satisfy multiple different operational environment's work needs.
Preferably, the switching mechanism comprises a hinge shaft for connecting the upper ladder frame and the lower ladder frame, a sliding sleeve which is arranged on the upper ladder frame or the lower ladder frame at the joint of the upper ladder frame and the lower ladder frame and can slide along the upper ladder frame or the lower ladder frame, and a stud for fixing the sliding sleeve.
By adopting the technical scheme, the sliding sleeve can slide along the upper ladder frame or the lower ladder frame, and when the second ladder frame is in a vertical ladder mode, the sliding sleeve is sleeved at the joint of the upper ladder frame and the lower ladder frame and is fixed through the stud; when the second ladder frame is in the double ladder mode, the sliding sleeve cover is established on last ladder frame or lower ladder frame, and at this moment, go up ladder frame and lower ladder frame and can rotate around the hinge until rotating the position that needs to satisfy the operation of ascending a height of domatic or concave and convex surfaces such as stair, convenient to use, flexible operation.
Preferably, the sliding sleeve is provided with a strip-shaped groove corresponding to the inner side of the upper ladder frame or the inner side of the lower ladder frame, the sliding sleeve is provided with a first fixed jack, the upper ladder frame and the lower ladder frame are provided with a second fixed jack corresponding to the first fixed jack, and the first fixed jack and the second fixed jack are inserted with a stud.
By adopting the technical scheme, the strip-shaped groove has a certain limiting effect on the sliding sleeve, so that the sliding sleeve is prevented from falling off in the sliding process; the studs are inserted into the first fixing insertion holes and the second fixing insertion holes and fix the sliding sleeves, so that the stability of the connecting structure is enhanced, and the use is safe and reliable.
Preferably, the connecting platform comprises a first platform hinged to the top end of the first ladder frame and a second platform hinged to the top end of the second ladder frame, and the first platform and the second platform are connected through hinges.
Through adopting above-mentioned technical scheme, first platform and second platform can be around the hinge upset, and convenient the accomodating saves space.
Preferably, the first ladder frame comprises two first vertical rods arranged oppositely and at least one first pedal connected between the two first vertical rods.
Through adopting above-mentioned technical scheme, the number and the size of first footboard can set up according to the actual work demand, satisfy the work needs of co-altitude, different width.
Preferably, the bottom end of the first vertical rod is provided with a first anti-slip pad, and the first pedal is provided with first anti-slip lines.
Through adopting above-mentioned technical scheme, all set up first protection pad in the bottom of first montant, effectively improve the ladder phenomenon of skidding in the use bottom to set up first anti-skidding line on first footboard, skid under the foot when improving electrician's ascending stair, improve factor of safety.
Preferably, the second ladder frame comprises two second vertical rods arranged oppositely and at least one second pedal connected between the two second vertical rods.
Through adopting above-mentioned technical scheme, the number and the size of second footboard can set up according to the actual work demand, satisfy the work needs of co-altitude, different width.
Preferably, a second anti-slip pad is arranged at the bottom end of the second vertical rod, and second anti-slip lines are arranged on the second pedal.
Through adopting above-mentioned technical scheme, all set up the second protection in the bottom of second montant and fill up, effectively improve the ladder use in the bottom and skid to set up second antiskid line on the second footboard, the phenomenon of skidding under the foot when improving electrician's ascending a ladder improves the security that the ladder body used.
Preferably, the telescopic joint includes hollow structure's last ladder festival and lower ladder festival, goes up the ladder festival and can freely stretch into lower ladder festival, one side equidistance of going up the ladder festival sets up the ladder festival jack, be equipped with the lower ladder festival jack that corresponds with last ladder festival jack on the lower ladder festival, go up ladder festival jack and lower ladder festival jack intercommunication and insert and establish adjusting bolt.
Through adopting above-mentioned technical scheme, the telescopic joint can be used for adjusting the height of second ladder frame, can cooperate the shifter work again, carries out double ladder or vertical ladder conversion work to second ladder frame, is applicable to the operational environment of various height unevenness, and ladder body application scope is wide.
To sum up, the utility model has the advantages that:
1. the ladder body is arranged in a multi-ladder-frame structure, so that various working requirements are met, and electricians can conveniently climb up; the connecting platform is arranged, so that a safe supporting environment is provided for electricians; the conversion mechanism can convert the second ladder frame into a herringbone ladder or a straight ladder and is matched with the expansion joint for adjustment, so that the double-ladder type ladder is suitable for various uneven working environments and meets working requirements;
2. the sliding sleeve is arranged at the joint of the upper ladder frame and the lower ladder frame and is fixed through the stud, so that various climbing operations on slopes or planes such as stairs and the like are met, and the multifunctional ladder is convenient to use and flexible to operate;
3. the bottom ends of the first vertical rods are provided with the first protective pads, and the bottom ends of the second vertical rods are provided with the second protective pads, so that the problem of bottom slipping in the using process of the ladder is effectively solved, and the using safety of the ladder is improved;
4. set up first anti-skidding line on first footboard, set up second anti-skidding line on the second footboard, the foot skids when improving electrician's ascending stair, improves the safety in utilization.
Drawings
Fig. 1 is a schematic structural view of the present invention;
fig. 2 is a schematic structural view of a first ladder frame of the present invention;
fig. 3 is a schematic structural view of a second ladder rack of the present invention;
fig. 4 is a schematic structural view of the middle sliding sleeve of the present invention;
FIG. 5 is a schematic structural view of the middle expansion joint of the present invention;
fig. 6 is a schematic structural view of the middle connecting rod fixing mechanism of the present invention;
fig. 7 is a schematic view of the present invention applied to stairs.
Reference numerals:
1. a ladder body; 2. a first ladder frame; 21. a first vertical bar; 22. a first pedal; 23. a first non-slip mat; 24. a first anti-skid pattern; 3. a second ladder frame; 31. a second vertical bar; 32. a second pedal; 33. a second non-slip mat; 34. a second anti-skid pattern; 35. going up a ladder; 36. descending a ladder rack; 4. connecting the platform; 41. a first platform; 42. a second platform; 43. a hinge; 5. a switching mechanism; 51. a hinge shaft; 52. a sliding sleeve; 521. a strip-shaped groove; 522. a first fixed insertion hole; 523. a second fixed jack; 53. a stud; 6. an expansion joint; 61. going up a ladder section; 62. descending a ladder section; 63. an upper ladder section jack; 64. inserting holes of lower ladder sections; 65. adjusting the bolt; 7. a connecting rod fixing mechanism; 71. a first link; 72. a second link; 73. a second chute; 74. positioning pins; 8. a first chute; 9. a pin shaft; 10. a slide block.
Detailed Description
Example (b):
a multifunctional ladder, as shown in fig. 1, 2, 3, 4, 5, 6 and 7, comprising a ladder body 1, wherein the ladder body 1 comprises a first ladder frame 2, a second ladder frame 3 and a connecting platform 4 arranged at the top of the first ladder frame 2 and the second ladder frame 3 for connecting the first ladder frame 2 and the second ladder frame 3; the second ladder frame 3 is provided with an expansion joint 6 which can adjust the height of the second ladder frame 3, and a switching mechanism 5 which can switch the second ladder frame 3 into a herringbone ladder or a straight ladder.
The ladder body 1 is arranged into a multi-ladder-frame structure, so that an electrician can conveniently climb to a high position to assemble the watch, the connecting platform 4 is arranged, a safe supporting environment is provided for the electrician ladder, the second ladder frame 3 can be converted into a herringbone ladder or a straight ladder through the conversion mechanism 5, and the extension joint 6 is matched for adjustment, so that the ladder is suitable for various uneven working environments; when the ladder is in an uneven working environment such as stairs, the second ladder frame 3 is switched to a herringbone ladder mode through the switching mechanism, and the height is adjusted by combining the telescopic joint 6, so that the stability of the ladder body 1 can be conveniently adjusted; when the ladder is in the horizontal plane, then accessible shifter switches over second ladder frame 3 to vertical ladder mode to the cooperation telescopic joint 6 carries out altitude mixture control, satisfies the work of the operation of ascending a height, and factor of safety is high.
The second ladder frame 3 comprises an upper ladder frame 35 and a lower ladder frame 36, and the switching mechanism 5 is arranged between the upper ladder frame 35 and the lower ladder frame 36; set up second ladder frame 3 segmentation, the installation is convenient with the dismantlement, and is convenient for buckle second ladder frame 3, and domatic operations of ascending a height such as stair of being convenient for.
The conversion mechanism 5 comprises a hinge shaft 51 for connecting the upper ladder frame 35 and the lower ladder frame 36, a sliding sleeve 52 which is arranged on the upper ladder frame 35 or the lower ladder frame 36 at the connection part of the upper ladder frame 35 and the lower ladder frame 36 and can slide along the upper ladder frame 35 or the lower ladder frame 36, and a stud 53 for fixing the sliding sleeve 52. The sliding sleeve 52 can slide along the upper ladder frame 35 or the lower ladder frame 36, and when the second ladder frame 3 is in the vertical ladder mode, the sliding sleeve 52 is sleeved at the joint of the upper ladder frame 35 and the lower ladder frame 36 and fixed through the stud 53; when the second ladder frame 3 is in the herringbone ladder mode, the sliding sleeve 52 is sleeved on the upper ladder frame 35 or the lower ladder frame 36, at the moment, the upper ladder frame 35 and the lower ladder frame 36 can rotate around the hinge shaft 51 until the required positions are rotated, so that ascending operation of slopes or concave-convex surfaces such as stairs is met, and the herringbone ladder is convenient to use and flexible to operate.
The sliding sleeve 52 is provided with a strip-shaped groove 521 corresponding to the inner side of the upper ladder frame 35 or the lower ladder frame 36, the sliding sleeve 52 is provided with a first fixed jack 522, the upper ladder frame 35 and the lower ladder frame 36 are provided with a second fixed jack 523 corresponding to the first fixed jack 522, and the first fixed jack 522 and the second fixed jack 523 are inserted with a stud 53; the strip-shaped groove 521 has a certain limiting effect on the sliding sleeve 52, so that the sliding sleeve 52 is prevented from falling off; the studs 53 are inserted into the first fixing insertion hole 522 and the second fixing insertion hole 523 to fix the sliding sleeve 52, so that the stability of the connection structure is enhanced.
The connecting platform 4 comprises a first platform 41 hinged to the top end of the first ladder frame 2 and a second platform 42 hinged to the top end of the second ladder frame 3, and the first platform 41 and the second platform 42 are connected through a hinge 43; the first platform 41 and the second platform 42 can be turned over around the hinge 43, so that the folding is convenient, and the space is saved.
The first ladder frame 2 comprises two first vertical rods 21 which are oppositely arranged and at least one first pedal 22 which is connected between the two first vertical rods 21; the number and size of the first pedals 22 can be set according to actual working requirements, and working requirements of different heights and different widths can be met.
The bottom of first montant 21 is equipped with first slipmat 23, effectively improves the ladder use in the bottom and skids, be equipped with first anti-skidding line 24 on the first footboard 22, the underfoot is skidded when improving electrician's ascending stair, improves factor of safety.
The second ladder frame 3 includes two second montants 31 that set up relatively, connects in two at least one second footboard 32 between the second montant 31, the number and the size of second footboard 32 can set up according to actual work demand, satisfy the work needs of co-altitude, different width.
The bottom of second montant 31 is equipped with second slipmat 33, effectively improves the ladder use in the bottom and skids, is equipped with second antiskid line 34 on the second footboard 32, and the underfoot is skidded when effectively improving electrician's ascending stair, improves factor of safety.
The telescopic joint 6 comprises an upper ladder section 61 and a lower ladder section 62 which are of hollow structures, the upper ladder section 61 can freely extend into the lower ladder section 62, upper ladder section inserting holes 63 are formed in one side of the upper ladder section 61 at equal intervals, lower ladder section inserting holes 64 corresponding to the inserting holes of the upper ladder section 61 are formed in the lower ladder section 62, and adjusting bolts 65 are inserted in the upper ladder section inserting holes 63 and the lower ladder section inserting holes 64 in a communicated manner; the telescopic joint 6 can adjust the height of the second ladder frame 3 and can work in cooperation with the switching mechanism 5 to switch the second ladder frame 3 into a herringbone ladder or a straight ladder, and the ladder is suitable for various uneven working environments.
Be equipped with connecting rod fixed establishment 7 between first ladder frame 2 and second ladder frame 3, connecting rod fixed establishment 7 fixes first ladder frame 2 and second ladder frame 3 to improve overall structure's stability, 7 one ends of connecting rod fixed establishment change through round pin axle 9 and establish on first ladder frame 2, and the other end of connecting rod fixed establishment 7 is equipped with the slider, is equipped with first spout 8 on second ladder frame 3, and slider 10 slips and establishes in first spout 8.
The connecting rod fixing mechanism 7 comprises a first connecting rod 71 and a second connecting rod 72 sleeved in the first connecting rod 71, wherein the first connecting rod 71 and the second connecting rod 72 are both arranged in a hollow mode, a second sliding groove 73 is formed in the side face of the first connecting rod 71, a positioning pin 74 is inserted into the second sliding groove 73, and the second connecting rod 72 is adjusted and positioned through the positioning pin 74.
In addition to the preferred embodiments described above, other embodiments of the present invention are also possible, and those skilled in the art can make various changes and modifications according to the present invention without departing from the spirit of the present invention, which should fall within the scope of the present invention defined by the appended claims.

Claims (10)

1. A multifunctional ladder comprises a ladder body and is characterized in that: the ladder body comprises a first ladder frame, a second ladder frame and a connecting platform which is arranged at the tops of the first ladder frame and the second ladder frame and used for connecting the first ladder frame and the second ladder frame; the second ladder frame is provided with an expansion joint which can adjust the height of the second ladder frame, and a switching mechanism which can switch the second ladder frame into a herringbone ladder or a straight ladder.
2. A multi-function ladder as claimed in claim 1, wherein: the second ladder frame comprises an upper ladder frame and a lower ladder frame, and the switching mechanism is arranged between the upper ladder frame and the lower ladder frame.
3. A multi-function ladder as claimed in claim 2, wherein: the conversion mechanism comprises a hinge shaft for connecting the upper ladder frame and the lower ladder frame, a sliding sleeve which is arranged on the upper ladder frame or the lower ladder frame at the joint of the upper ladder frame and the lower ladder frame and can slide along the upper ladder frame or the lower ladder frame, and a stud for fixing the sliding sleeve.
4. A multi-function ladder as claimed in claim 3, wherein: the sliding sleeve is provided with a strip-shaped groove corresponding to the inner side of the upper ladder frame or the inner side of the lower ladder frame, the sliding sleeve is provided with a first fixed jack, the upper ladder frame and the lower ladder frame are provided with a second fixed jack corresponding to the first fixed jack, and a stud is inserted into the first fixed jack and the second fixed jack.
5. A multi-function ladder as claimed in claim 1, wherein: the connecting platform comprises a first platform and a second platform, wherein the first platform is hinged to the top end of the first ladder frame, the second platform is hinged to the top end of the second ladder frame, and the first platform is connected with the second platform through a hinge.
6. A multi-function ladder as claimed in claim 1, wherein: first ladder frame includes two first montants that set up relatively, connects in two at least one first footboard between the first montant.
7. A multi-function ladder as claimed in claim 6, wherein: the bottom of first montant is equipped with first slipmat, be equipped with first anti-skidding line on the first footboard.
8. A multi-function ladder as claimed in claim 1, wherein: the second ladder frame comprises two second vertical rods arranged oppositely and at least one second pedal connected between the two second vertical rods.
9. A multi-function ladder as claimed in claim 8, wherein: the bottom end of the second vertical rod is provided with a second anti-slip pad, and the second pedal is provided with second anti-slip lines.
10. A multi-function ladder as claimed in claim 1, wherein: the telescopic joint includes hollow structure's ladder section and lower ladder section, goes up the ladder section and can freely stretch into lower ladder section in, one side equidistance of going up the ladder section sets up ladder section jack, be equipped with the lower ladder section jack that corresponds with last ladder section jack on the lower ladder section, go up ladder section jack and lower ladder section jack intercommunication and insert and establish adjusting bolt.
CN201821762822.3U 2018-10-29 2018-10-29 Multifunctional ladder Active CN209908379U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201821762822.3U CN209908379U (en) 2018-10-29 2018-10-29 Multifunctional ladder

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201821762822.3U CN209908379U (en) 2018-10-29 2018-10-29 Multifunctional ladder

Publications (1)

Publication Number Publication Date
CN209908379U true CN209908379U (en) 2020-01-07

Family

ID=69025142

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201821762822.3U Active CN209908379U (en) 2018-10-29 2018-10-29 Multifunctional ladder

Country Status (1)

Country Link
CN (1) CN209908379U (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109469442A (en) * 2018-10-29 2019-03-15 国网浙江省电力有限公司温州供电公司 A kind of multifunctional ladder

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109469442A (en) * 2018-10-29 2019-03-15 国网浙江省电力有限公司温州供电公司 A kind of multifunctional ladder

Similar Documents

Publication Publication Date Title
CN109469442A (en) A kind of multifunctional ladder
CN204558968U (en) Based on instrument transformer replacing hoistable platform in 35kV and following switch cubicle
CN209908379U (en) Multifunctional ladder
CN102691474A (en) Maintenance platform
CN204419012U (en) Overturning-preventing double ladder
CN207245601U (en) A kind of suspension type safety extension ladder
CN207003981U (en) A kind of movable altitude operation protective frame with safety supports
CN204290129U (en) A kind of New Type Isolating Switch repairing frame
CN202417284U (en) Foldable extensible vertical ladder for electricians
CN105932560A (en) Power distribution cabinet convenient to repair
CN207260643U (en) Scaffold pin-connected panel stair
CN203701929U (en) Special mobile insulation ladder for transformer substation
CN203547504U (en) Telescopic ladder
CN215565641U (en) Stretchable board ladder for buildings
CN203374294U (en) Safety walking ladder of large dip angle hydraulic support
CN211692261U (en) Multifunctional folding aluminum alloy ladder
CN210912789U (en) Marine spiral stair
CN209398349U (en) A kind of mobile maintenance platform of ascending stair formula
CN201314190Y (en) Telescopic insulating ladder
CN208160955U (en) Anti-slip cover and lineman climber for lineman climber
CN203878949U (en) Aerial work frame used for manufacturing workshop of interior trim parts
CN207620340U (en) A kind of fixed decoration platform in outdoor for building
CN218643805U (en) Power transformation equipment overhauls platform with adjustable power supply company
KR101099298B1 (en) Chute ladder
CN205400563U (en) Machine electrical engineering is with installation ladder

Legal Events

Date Code Title Description
GR01 Patent grant
GR01 Patent grant