CN111452423A - Wallboard lifting device - Google Patents
Wallboard lifting device Download PDFInfo
- Publication number
- CN111452423A CN111452423A CN202010394067.3A CN202010394067A CN111452423A CN 111452423 A CN111452423 A CN 111452423A CN 202010394067 A CN202010394067 A CN 202010394067A CN 111452423 A CN111452423 A CN 111452423A
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- China
- Prior art keywords
- driving rod
- sliding
- conveying belt
- connecting plate
- board
- 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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31B50/00—Making rigid or semi-rigid containers, e.g. boxes or cartons
- B31B50/02—Feeding or positioning sheets, blanks or webs
- B31B50/04—Feeding sheets or blanks
- B31B50/042—Feeding sheets or blanks using rolls, belts or chains
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31B50/00—Making rigid or semi-rigid containers, e.g. boxes or cartons
- B31B50/74—Auxiliary operations
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G23/00—Driving gear for endless conveyors; Belt- or chain-tensioning arrangements
- B65G23/44—Belt or chain tensioning arrangements
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H5/00—Feeding articles separated from piles; Feeding articles to machines
- B65H5/02—Feeding articles separated from piles; Feeding articles to machines by belts or chains, e.g. between belts or chains
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
- B66F7/00—Lifting frames, e.g. for lifting vehicles; Platform lifts
- B66F7/10—Lifting frames, e.g. for lifting vehicles; Platform lifts with platforms supported directly by jacks
- B66F7/16—Lifting frames, e.g. for lifting vehicles; Platform lifts with platforms supported directly by jacks by one or more hydraulic or pneumatic jacks
- B66F7/18—Lifting frames, e.g. for lifting vehicles; Platform lifts with platforms supported directly by jacks by one or more hydraulic or pneumatic jacks by a single central jack
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
- B66F7/00—Lifting frames, e.g. for lifting vehicles; Platform lifts
- B66F7/28—Constructional details, e.g. end stops, pivoting supporting members, sliding runners adjustable to load dimensions
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Structural Engineering (AREA)
- Conveying And Assembling Of Building Elements In Situ (AREA)
Abstract
The invention discloses a wallboard lifting device, which comprises an equipment support, wherein the equipment support comprises sliding supports distributed in an array manner, first sliding rails are arranged on the sliding supports, a sliding platform is jointly arranged on the first sliding rails, a first air cylinder is arranged at the center of the sliding platform, a first telescopic rod is arranged at the lower end of the first air cylinder, second telescopic rods are arranged on two sides of the first air cylinder, a first connecting plate and a second connecting plate are respectively arranged at the lower ends of the first telescopic rod and the second telescopic rod, sliding blocks distributed in an array manner are arranged at the lower end of the sliding platform, an equipment platform is arranged at the lower end of the equipment support, a second plate conveying mechanism and a third plate conveying mechanism are arranged on the equipment platform, a fourth plate conveying mechanism is jointly arranged at the lower ends of the first connecting plate and the second connecting plate, and a first. The invention has simple structure, greatly improves the working efficiency, can automatically adjust, simultaneously reduces the requirement on the technical level of workers, can be operated by common operators and enhances the precision of the machine.
Description
Technical Field
The invention relates to the field of manufacturing of general mechanical equipment, in particular to a wallboard lifting device.
Background
The box gluing machine is mechanical equipment used for gluing folding cartons in carton factories, and is divided into an upper folding type and a lower folding type. The box gluing machine generally comprises a paper feeding part, a deviation correcting part, a crease line shaping part, a gluing part, a folding part and a counting and discharging part. The semi-automatic box gluing machine refers to a mechanical device which is manually involved in the gluing forming process of a carton, the semi-automatic box gluing machine cannot be used in a carton production line, the middle wallboard of the existing box gluing machine generally has a small paper version machine type, and has no two groups of wallboards, namely an upper wallboard and a lower wallboard, when large paper is made, obvious power shortage and paper falling, in response to this situation, a wallboard lifting device is now proposed.
Disclosure of Invention
The invention aims to provide a wallboard lifting device which is simple in structure, small paper can pass through the wallboard lifting device smoothly through automatic adjustment, the power of the large paper is sufficient, the phenomenon of falling is avoided, the working efficiency is greatly improved, the wallboard lifting device can be automatically adjusted, meanwhile, the requirement on the technical level of workers is reduced, common operators can operate the wallboard lifting device, and the precision of a machine is enhanced.
The purpose of the invention can be realized by the following technical scheme:
a wallboard lifting device comprises an equipment bracket, wherein the equipment bracket comprises sliding brackets distributed in an array manner, the sliding brackets are respectively provided with a first sliding rail, the first sliding rail is jointly provided with a sliding platform, the center of the sliding platform is provided with a first air cylinder, the lower end of the first air cylinder is provided with a first telescopic rod, the two sides of the first air cylinder are respectively provided with a second telescopic rod, the lower ends of the first telescopic rod and the second telescopic rod are respectively provided with a first connecting plate and a second connecting plate, the lower end of the sliding platform is provided with a sliding block distributed in an array manner, the sliding block is in sliding fit with the first sliding rail, one side of the sliding platform is provided with a first servo motor, the lower end of the first servo motor is provided with a first driving rod, the top end of the first driving rod is provided with a gear, the outer side of the sliding bracket on one side is provided with a rack, the gear and the rack are, the lower ends of the first connecting plate and the second connecting plate are provided with a fourth plate conveying mechanism together, and the lower end of the sliding support is also provided with a first plate conveying mechanism.
Further, first fortune board mechanism includes the fixed plate, is equipped with the second cylinder on the fixed plate, and the second cylinder lower extreme is equipped with the third telescopic link, and second cylinder both sides still are equipped with the fourth telescopic link, and the third telescopic link is equipped with third connecting plate and fourth connecting plate respectively with the fourth telescopic link lower extreme, and the third connecting plate is equipped with the cylinder frame jointly with fourth connecting plate lower extreme, is equipped with the cylinder groove of array distribution in the cylinder frame, is equipped with the drum shaft of array distribution in the cylinder frame, and the drum shaft all is equipped with the cylinder on cylinder inslot portion.
Further, second fortune board mechanism includes first transmission band frame, be equipped with the first inclined to one side board of preventing on the first transmission band frame, first transmission band frame both ends all are equipped with first actuating lever installation piece, first actuating lever installation piece one side all is equipped with the tensioning adjusting lever, tensioning adjusting lever one end is equipped with the tensioning pole adjusting plate, all be equipped with the second actuating lever in the first actuating lever installation piece, second actuating lever top is equipped with first transmission band roller, second servo motor fixes in first actuating lever installation piece one end, drive one of them second actuating lever, be equipped with first conveyer belt jointly on the first transmission band roller, first actuating lever installation piece below still is equipped with the third cylinder that the array distributes, be equipped with the fifth telescopic link on the third cylinder, the fifth telescopic link top is fixed at first actuating lever installation piece lower extreme.
Further, third fortune trigger constructs includes the second conveyer belt frame, and second conveyer belt frame both ends all are equipped with second actuating lever installation piece, and wherein the second actuating lever installation piece outside of one end is equipped with third servo motor, the third actuating lever that is equipped with in the third servo motor drive second conveyer belt roller, second actuating lever installation piece below is equipped with array distribution's fourth cylinder, is equipped with the sixth telescopic link on the fourth cylinder, and the second actuating lever installation piece lower extreme is fixed on the sixth telescopic link top, is equipped with the second conveyer belt jointly on the second conveyer belt roller.
Further, the third plate conveying mechanism is also provided with the same tensioning mechanism as the second plate conveying mechanism.
Further, the fourth conveying plate mechanism comprises a third conveying belt frame, a connecting support is arranged on one side of the third conveying belt frame, an extension plate is arranged on one side of the connecting support, a fifth connecting plate is jointly arranged at the top end of the extension plate, the fifth connecting plate is connected with the first connecting plate and the second connecting plate, a second deviation preventing plate is arranged on the third conveying belt frame, third driving rod mounting blocks are arranged at two ends of the third conveying belt frame, fourth driving rods are arranged in the third driving rod mounting blocks, one ends of the fourth driving rods are respectively provided with a third conveying belt roller, a fourth servo motor is externally connected to the fourth driving rod on one side of the fourth driving rod, and a third conveying belt is jointly arranged on the third conveying belt roller.
The invention has the beneficial effects that:
1. the paper feeding device is simple in structure, small paper can pass through the paper feeding device smoothly through automatic adjustment, the power of the large paper is sufficient, the phenomenon of falling is avoided, and the working efficiency is greatly improved;
2. the invention can automatically adjust, simultaneously reduces the requirements on the technical level of workers, can be operated by common operators, and enhances the precision of the machine.
Drawings
The invention will be further described with reference to the accompanying drawings.
FIG. 1 is a schematic view of the construction of the wall panel lifting device of the present invention;
FIG. 2 is a schematic view of the apparatus stand configuration of the present invention;
FIG. 3 is a schematic structural view of a first plate conveying mechanism of the present invention;
FIG. 4 is a schematic structural view of a second plate conveying mechanism of the present invention;
FIG. 5 is a schematic structural view of a third plate conveying mechanism of the present invention;
fig. 6 is a schematic structural diagram of a fourth plate conveying mechanism of the invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it is to be understood that the terms "opening," "upper," "lower," "thickness," "top," "middle," "length," "inner," "peripheral," and the like are used in an orientation or positional relationship that is merely for convenience in describing and simplifying the description, and do not indicate or imply that the referenced component or element must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be considered as limiting the present invention.
A wall plate lifting device comprises an equipment support 1, as shown in fig. 1, fig. 2 and fig. 3, the equipment support 1 comprises sliding supports 11 distributed in an array, the sliding supports 11 are respectively provided with a first sliding rail 111, the first sliding rail 111 is provided with a sliding platform 12, the center of the sliding platform 12 is provided with a first air cylinder 121, the lower end of the first air cylinder 121 is provided with a first telescopic rod 122, both sides of the first air cylinder 121 are provided with second telescopic rods 124, the lower ends of the first telescopic rod 122 and the second telescopic rod 124 are respectively provided with a first connecting plate 123 and a second connecting plate 125, the lower end of the sliding platform 12 is provided with sliders 13 distributed in an array, the sliders 13 are in sliding fit with the first sliding rail 111, one side of the sliding platform 12 is provided with a first servo motor 14, the lower end of the first servo motor 14 is provided with a first driving rod 141, the top end of the first driving rod 141 is provided with a gear, the gear 142 and the rack 15 are meshed with each other, the lower end of the equipment support 1 is provided with an equipment platform 6, the equipment platform 6 is provided with a second plate conveying mechanism 3 and a third plate conveying mechanism 4, the lower ends of the first connecting plate 123 and the second connecting plate 125 are provided with a fourth plate conveying mechanism 5, and the lower end of the sliding support 11 is further provided with a first plate conveying mechanism 2.
First fortune board mechanism 2 includes fixed plate 2, as shown in fig. 1, fig. 3, be equipped with second cylinder 21 on the fixed plate 2, second cylinder 21 lower extreme is equipped with third telescopic link 211, second cylinder 21 both sides still are equipped with fourth telescopic link 22, third telescopic link 211 and fourth telescopic link 22 lower extreme are equipped with third connecting plate 212 and fourth connecting plate 221 respectively, third connecting plate 212 and fourth connecting plate 221 lower extreme are equipped with cylinder frame 23 jointly, be equipped with array distribution's cylinder groove 231 in the cylinder frame 23, be equipped with array distribution's reel 232 in the cylinder frame 23, reel 232 divides all to be equipped with cylinder 24 inside cylinder groove 231.
The second pallet conveying mechanism 3 comprises a first conveyor belt frame 31, as shown in figure 1, as shown in fig. 5, a first deviation-preventing plate 32 is disposed on the first transmission belt frame 31, first driving rod mounting blocks 33 are disposed at two ends of the first transmission belt frame 31, tensioning adjustment rods 331 are disposed on one sides of the first driving rod mounting blocks 33, a tensioning rod adjustment plate 332 is disposed at one end of each tensioning adjustment rod 331, second driving rods 342 are disposed in the first driving rod mounting blocks 33, first transmission belt rollers 341 are disposed at the top ends of the second driving rods 342, the second servo motor 34 is fixed at one end of each first driving rod mounting block 33 to drive one of the second driving rods 342, a first transmission belt 343 is disposed on the first transmission belt rollers 341, third cylinders 35 distributed in an array are further disposed below the first driving rod mounting blocks 33, fifth telescopic rods 351 are disposed on the third cylinders 35, and the top ends of the fifth telescopic rods 351 are fixed at the lower ends of the first driving rod mounting blocks 33.
The third plate conveying mechanism 4 includes a second conveying belt frame 41, as shown in fig. 1 and 4, two ends of the second conveying belt frame 41 are respectively provided with a second driving rod mounting block 42, a third servo motor 43 is arranged outside the second driving rod mounting block 42 at one end, the third servo motor 43 drives a third driving rod 432 arranged in the second conveying belt roller 431, the third plate conveying mechanism 4 is also provided with a tensioning mechanism identical to that of the second plate conveying mechanism 3, fourth air cylinders 45 distributed in an array manner are arranged below the second driving rod mounting block 42, a sixth telescopic rod 451 is arranged on the fourth air cylinders 45, the top end of the sixth telescopic rod 451 is fixed at the lower end of the second driving rod mounting block 42, and the second conveying belt roller 431 is provided with a second conveying belt 44.
The fourth plate conveying mechanism 5 includes a third conveying belt frame 51, as shown in fig. 1 and 5, a connecting support 51 is disposed on one side of the third conveying belt frame 51, an extension plate 52 is disposed on one side of the connecting support 51, a fifth connecting plate 53 is disposed at the top end of the extension plate 52, the fifth connecting plate 53 is connected to the first connecting plate 123 and the second connecting plate 125, a second deviation preventing plate 54 is disposed on the third conveying belt frame 51, third driving rod mounting blocks 55 are disposed at two ends of the third conveying belt frame 51, a fourth driving rod 562 is disposed in the third driving rod mounting blocks 55, a third conveying belt roller 561 is disposed at one end of the fourth driving rod 562, a fourth servo motor 56 is externally connected to the fourth driving rod 562 on one side, and a third conveying belt 57 is disposed on the third conveying belt roller 561.
During the use, when producing the little carton, third fortune trigger structure 4 descends, and the position of adjustment sliding platform 12 on equipment support 1 is left, makes fourth fortune trigger structure 5 be close to second fortune trigger structure 3, and when producing big carton, third fortune trigger structure 4 descends, and the position of adjustment sliding platform 12 on equipment support 1 is right, makes fourth fortune trigger structure 5 keep away from second fortune trigger structure 3, is descending first fortune trigger structure 2.
In the description herein, references to the description of "one embodiment," "an example," "a specific example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed.
Claims (6)
1. A wallboard lifting device comprises an equipment support (1) and is characterized in that the equipment support (1) comprises sliding supports (11) which are distributed in an array manner, first sliding rails (111) are arranged on the sliding supports (11), a sliding platform (12) is jointly arranged on the first sliding rails (111), a first air cylinder (121) is arranged at the center of the sliding platform (12), a first telescopic rod (122) is arranged at the lower end of the first air cylinder (121), second telescopic rods (124) are arranged on two sides of the first air cylinder (121), a first connecting plate (123) and a second connecting plate (125) are respectively arranged at the lower ends of the first telescopic rod (122) and the second telescopic rod (124), sliders (13) which are distributed in an array manner are arranged at the lower end of the sliding platform (12), the sliders (13) are in sliding fit with the first sliding rails (111), a first servo motor (14) is arranged on one side of the sliding platform (12), and a first driving rod (141) is arranged at the lower end of the, first actuating lever (141) top is equipped with gear (142), sliding support (11) the outside of one side wherein is equipped with rack (15), gear (142) and rack (15) meshing mutually, equipment support (1) lower extreme is equipped with equipment platform (6), be equipped with second fortune board mechanism (3) and third fortune board mechanism (4) on equipment platform (6), first connecting plate (123) and second connecting plate (125) lower extreme are equipped with fourth fortune board mechanism (5) jointly, sliding support (11) lower extreme still is equipped with first fortune board mechanism (2).
2. The wallboard lifting device according to claim 1, wherein the first board conveying mechanism (2) comprises a fixing board (2), a second cylinder (21) is arranged on the fixing board (2), a third telescopic rod (211) is arranged at the lower end of the second cylinder (21), fourth telescopic rods (22) are further arranged on two sides of the second cylinder (21), a third connecting plate (212) and a fourth connecting plate (221) are respectively arranged at the lower ends of the third telescopic rod (211) and the fourth telescopic rod (22), a roller frame (23) is jointly arranged at the lower ends of the third connecting plate (212) and the fourth connecting plate (221), roller grooves (231) distributed in an array are formed in the roller frame (23), roller shafts (232) distributed in an array are formed in the roller frame (23), and rollers (24) are respectively arranged on the inner portions of the roller grooves (231).
3. The wallboard lifting device according to claim 1, wherein the second conveying plate mechanism (3) comprises a first conveying belt frame (31), a first deviation preventing plate (32) is arranged on the first conveying belt frame (31), first driving rod mounting blocks (33) are arranged at two ends of the first conveying belt frame (31), a tensioning adjusting rod (331) is arranged at one side of each first driving rod mounting block (33), a tensioning rod adjusting plate (332) is arranged at one end of each tensioning adjusting rod (331), a second driving rod (342) is arranged in each first driving rod mounting block (33), a first conveying belt roller (341) is arranged at the top end of each second driving rod (342), a second servo motor (34) is fixed at one end of each first driving rod mounting block (33) to drive one of the second driving rods (342), a first conveying belt (343) is arranged on the first conveying belt rollers (341) together, the third cylinder (35) that the array distributes still is equipped with below first actuating lever installation piece (33), is equipped with fifth telescopic link (351) on third cylinder (35), and first actuating lever installation piece (33) lower extreme is fixed on fifth telescopic link (351) top.
4. The wallboard lifting device according to claim 1, wherein the third plate conveying mechanism (4) comprises a second conveying belt frame (41), second driving rod mounting blocks (42) are arranged at two ends of the second conveying belt frame (41), a third servo motor (43) is arranged outside the second driving rod mounting block (42) at one end, the third servo motor (43) drives a third driving rod (432) arranged in the second conveying belt roller (431), fourth air cylinders (45) distributed in an array mode are arranged below the second driving rod mounting blocks (42), sixth telescopic rods (451) are arranged on the fourth air cylinders (45), the top ends of the sixth telescopic rods (451) are fixed at the lower ends of the second driving rod mounting blocks (42), and a second conveying belt (44) is arranged on the second conveying belt roller (431) together.
5. A wall panel lifting device according to claim 1, characterised in that the third panel transport mechanism (4) is also provided with the same tensioning mechanism as the second panel transport mechanism (3).
6. The wallboard lifting device according to claim 1, wherein the fourth board conveying mechanism (5) comprises a third transmission belt frame (51), a connecting bracket (51) is arranged on one side of the third transmission belt frame (51), an extension board (52) is arranged on one side of the connecting bracket (51), a fifth connecting board (53) is jointly arranged at the top end of the extension board (52), the fifth connecting board (53) is connected with the first connecting board (123) and the second connecting board (125), a second deviation-preventing board (54) is arranged on the third transmission belt frame (51), third driving rod mounting blocks (55) are arranged at both ends of the third transmission belt frame (51), a fourth driving rod (562) is arranged in each third driving rod mounting block (55), a third transmission belt roller (561) is arranged at one end of each fourth driving rod (562), a fourth servo motor (56) is externally connected to the fourth driving rod (562) on one side, the third conveying belt rollers (561) are provided with a third conveying belt (57) together.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010394067.3A CN111452423A (en) | 2020-05-11 | 2020-05-11 | Wallboard lifting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010394067.3A CN111452423A (en) | 2020-05-11 | 2020-05-11 | Wallboard lifting device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111452423A true CN111452423A (en) | 2020-07-28 |
Family
ID=71674705
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010394067.3A Pending CN111452423A (en) | 2020-05-11 | 2020-05-11 | Wallboard lifting device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111452423A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112777535A (en) * | 2021-02-18 | 2021-05-11 | 胡兵 | High-rise building operation platform |
-
2020
- 2020-05-11 CN CN202010394067.3A patent/CN111452423A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112777535A (en) * | 2021-02-18 | 2021-05-11 | 胡兵 | High-rise building operation platform |
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