CN109230279B - Building construction hoisting device - Google Patents
Building construction hoisting device Download PDFInfo
- Publication number
- CN109230279B CN109230279B CN201810926986.3A CN201810926986A CN109230279B CN 109230279 B CN109230279 B CN 109230279B CN 201810926986 A CN201810926986 A CN 201810926986A CN 109230279 B CN109230279 B CN 109230279B
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- lifting
- guide
- supporting seat
- ropes
- support
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Classifications
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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
- B65G25/00—Conveyors comprising a cyclically-moving, e.g. reciprocating, carrier or impeller which is disengaged from the load during the return part of its movement
- B65G25/04—Conveyors comprising a cyclically-moving, e.g. reciprocating, carrier or impeller which is disengaged from the load during the return part of its movement the carrier or impeller having identical forward and return paths of movement, e.g. reciprocating conveyors
- B65G25/06—Conveyors comprising a cyclically-moving, e.g. reciprocating, carrier or impeller which is disengaged from the load during the return part of its movement the carrier or impeller having identical forward and return paths of movement, e.g. reciprocating conveyors having carriers, e.g. belts
- B65G25/065—Reciprocating floor conveyors
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B50/00—Energy efficient technologies in elevators, escalators and moving walkways, e.g. energy saving or recuperation technologies
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Emergency Lowering Means (AREA)
- Conveying And Assembling Of Building Elements In Situ (AREA)
Abstract
The invention discloses a building construction lifting device, which relates to the field of building construction equipment and comprises an upper supporting seat, a lower supporting seat, a lifting hopper, lifting ropes and two guide ropes, wherein the upper supporting seat is used for being installed in a building, the lower supporting seat is used for being fixedly installed on the ground, a guide rope winding and unwinding device is arranged in the lower supporting seat and connected with the guide ropes, the upper supporting seat is provided with the lifting rope winding and unwinding device, the lifting rope winding and unwinding device is connected with the lifting ropes, the upper supporting seat is provided with two connecting buckles, the connecting buckles are arranged at the lower end of the lifting rope winding and unwinding device, each guide rope is fixedly connected with one connecting buckle, two sides of the lifting hopper are respectively in sliding connection with the two guide ropes, and the middle part of the upper edge of the lifting hopper is fixedly connected with the lifting ropes. The building construction lifting device can prevent the lifting hopper from shaking, has high stability, does not damage a building, and ensures construction safety.
Description
Technical Field
The invention relates to the field of building construction equipment, in particular to a building construction lifting device.
Background
The lifting equipment is common equipment in building construction, comprises a tower crane, a small hoisting machine and the like, and is selected according to construction requirements in a specific construction process. The existing small hoisting machine is widely used in low-floor construction due to the fact that the installation is convenient, the operation is simple, when the small hoisting machine is used, expansion bolts are required to be punched in a building to fix the small hoisting machine, certain damage can be caused to the building in the process of punching the expansion bolts, the existing small hoisting machine mainly adopts a hoisting steel wire rope to finish lifting of building materials, a lifting hopper shakes in the use process, the phenomenon that the building is collided is caused, and potential danger exists.
Disclosure of Invention
In order to solve the technical problems, the invention provides the building construction lifting device which can prevent a lifting hopper from shaking, has high stability, does not damage a building and ensures construction safety.
In order to achieve the above object, the present invention provides the following solutions:
the invention provides a building construction lifting device which comprises an upper supporting seat, a lower supporting seat, a lifting hopper, lifting ropes and two guide ropes, wherein the upper supporting seat is used for being installed in a building, the lower supporting seat is used for being fixedly installed on the ground, a guide rope winding and unwinding device is arranged in the lower supporting seat, the guide rope winding and unwinding device is connected with the guide ropes and used for controlling winding and unwinding of the guide ropes, the upper supporting seat is provided with the lifting rope winding and unwinding device, the lifting rope winding and unwinding device is connected with the lifting ropes and used for controlling winding and unwinding of the lifting ropes, the upper supporting seat is provided with two connecting buckles, the connecting buckles are arranged at the lower end of the lifting rope winding and unwinding device, each guide rope is fixedly connected with one connecting buckle, two sides of the lifting hopper are respectively in sliding connection with the two guide ropes, and the middle part of the upper edge of the lifting hopper is fixedly connected with the lifting ropes.
Preferably, the guiding rope winding and unwinding device comprises a first motor, a rotating shaft, a ratchet wheel, pawls and two lower reels, a cavity is formed in the bottom of the lower supporting seat, the rotating shaft is horizontally arranged in the cavity, penetrates through the lower supporting seat and is in rotating connection with the lower supporting seat, one end of the rotating shaft is provided with the first motor, the other end of the rotating shaft is provided with the ratchet wheel, the outer wall of the lower supporting seat is provided with the pawls adaptive to the ratchet wheel, the rotating shaft is in transmission connection with the first motor, two lower reels adaptive to two guiding ropes are arranged in the rotating shaft, two strip-shaped holes adaptive to the two guiding ropes are formed in the top of the lower supporting seat, the strip-shaped holes are communicated with the cavity, and one end of each guiding rope enters the cavity through the strip-shaped holes and is fixedly connected with one lower reel.
Preferably, two support columns are fixedly arranged on the lower support seat, each support column is hinged with a support tube at the upper end, the support tubes are arranged above the lower winding drum in an inclined mode, and each guide rope penetrates through one support tube and is fixed on one connecting buckle.
Preferably, two sides of the lifting hopper are respectively provided with a guide sleeve, each guide rope penetrates through one guide sleeve, and each guide sleeve is arranged between one supporting tube and one connecting buckle.
Preferably, the outer wall of the lifting hopper is provided with a waist-shaped hole, the central line of the waist-shaped hole is arc-shaped, one end of the guide sleeve is hinged with the lifting hopper, two locking bolts are arranged on two sides of the other end of the guide sleeve, the two locking bolts respectively penetrate through the waist-shaped hole and connect the other end of the guide sleeve with the lifting hopper, and a discharging door is arranged on one side surface of the lifting hopper away from the supporting column.
Preferably, a supporting rod is arranged on one side of the supporting column, which is close to the lower supporting seat, one end of the supporting rod is fixedly connected with the upper part of the supporting column, and the other end of the supporting rod is fixedly connected with the lower supporting seat.
Preferably, the upper support base comprises a bottom support, a rectangular support frame, a horizontal support and a vertical support, wherein one end of the bottom support is provided with the rectangular support frame, the top of one side of the rectangular support frame is provided with the horizontal support, the vertical support is fixed between the horizontal support and the bottom support, and two connecting buckles which are adaptive to two guide ropes are arranged on the upper portion of the vertical support.
Preferably, the hoisting rope winding and unwinding device comprises a second motor, a supporting shaft, an upper winding drum and two supports, wherein two supports are fixed at one end, far away from the rectangular supporting frame, of the top of the horizontal support, the supporting shaft is rotationally connected with two supports, the upper winding drum which is adaptive to the hoisting rope is fixedly arranged on the supporting shaft, the second motor is arranged at the top of the horizontal support, and the second motor is in transmission connection with the supporting shaft.
Preferably, the middle parts of two ends of the rectangular supporting frame are respectively provided with a telescopic frame, each telescopic frame comprises two telescopic rods which are arranged in parallel, and a connecting rod is arranged between the two telescopic rods.
Preferably, a mounting plate is arranged at one end of the expansion bracket, which is far away from the rectangular supporting frame, and a fixing bolt is arranged on the mounting plate.
Compared with the prior art, the invention has the following technical effects:
1. according to the building construction lifting device, the lifting hopper can slide along the guide ropes, the guide ropes are utilized for providing guidance for the movement of the lifting hopper, the movement track of the lifting hopper is fixed on the guide ropes, the lifting hopper can be prevented from shaking in the lifting process, the lifting rope is positioned between the two guide ropes, the second motor is started, the upper winding drum can be driven to rotate, the lifting of the lifting hopper is further completed, the lifting hopper can be effectively prevented from shaking in the lifting process, the stability is high, the building is not damaged, and the construction safety is ensured.
2. According to the building construction lifting device, the lower supporting seat is fixedly arranged on the ground, the upper supporting seat is fixedly arranged in a building, one end of the guide rope is fixed on the lower winding drum, the other end of the guide rope is fixed on the connecting buckle, the telescopic frames at the two ends of the rectangular supporting frame are lengthened, the telescopic frames are enabled to be in contact with posts on the building, the upper supporting seat can be prevented from sliding off from the two posts, the first motor is started, the lower winding drum can be driven to rotate, the guide rope can be tensioned, the telescopic frames are enabled to be in tight contact with the posts, the telescopic frames can be prevented from falling off from the posts, and the mounting stability of the upper supporting seat is ensured.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic view of a construction lifting device according to the present invention;
FIG. 2 is a schematic view of a connection structure of the lower support base of the present invention;
FIG. 3 is a schematic view of a connection structure of the upper support base of the present invention;
FIG. 4 is a schematic view of the internal structure of the lower support base of the present invention;
fig. 5 is a schematic view of a connection structure of the expansion bracket of the present invention.
Reference numerals illustrate: 1. a bottom bracket; 2. a lower support base; 3. embedding a threaded pipe; 4. an anchor bolt; 5. a support column; 6. a brace rod; 7. a guide rope; 8. a rotating shaft; 9. a first motor; 10. a ratchet wheel; 11. a pawl; 12. a lower winding drum; 13. lifting the hopper; 14. a guide sleeve; 15. hoisting ropes; 16. a rectangular support frame; 17. a telescopic frame; 18. a horizontal bracket; 19. a vertical support; 20. a connecting buckle; 21. feeding a winding drum; 22. a support; 23. a second motor; 24. a locking bolt; 25. a waist-shaped hole; 26. a mounting plate; 27. a fixing bolt; 28. a support tube; 29. a cavity.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The invention provides a building construction lifting device which can prevent a lifting hopper from shaking, has high stability, does not damage a building and ensures construction safety.
In order that the above-recited objects, features and advantages of the present invention will become more readily apparent, a more particular description of the invention will be rendered by reference to the appended drawings and appended detailed description.
As shown in fig. 1-3, this embodiment provides a building construction lifting device, including upper supporting seat, lower supporting seat 2, lifting hopper 13, hoist rope 15 and two guide ropes 7, upper supporting seat is arranged in installing in the building, lower supporting seat 2 is used for fixed mounting subaerial, be provided with guide rope winding and unwinding device in the lower supporting seat 2, guide rope winding and unwinding device is connected with guide rope 7 and is used for controlling the winding and unwinding of guide rope 7, be provided with hoist rope winding and unwinding device on the upper supporting seat, hoist rope winding and unwinding device is connected with hoist rope 15 and is used for controlling the winding and unwinding of hoist rope 15, be provided with two connector links 20 on the upper supporting seat, connector links 20 set up in hoist rope winding and unwinding device's lower extreme, every guide rope 7 and a connector link 20 fixed connection, the both sides of lifting hopper 13 form sliding connection with two guide ropes 7 respectively, the middle part and the hoist rope 15 fixed connection of lifting hopper 13 upper edge, utilize two guide ropes 7 to provide the direction for the removal of lifting hopper 13, can prevent lifting hopper 13 from rocking in the lifting process, stability is high, the building is not damaged.
As shown in fig. 4, the guiding rope winding and unwinding device comprises a first motor 9, a rotating shaft 8, a ratchet wheel 10, a pawl 11 and two lower drums 12, a cavity 29 is arranged at the bottom of the lower supporting seat 2, the rotating shaft 8 is horizontally arranged in the cavity 29, the rotating shaft 8 penetrates through the lower supporting seat 2 and is rotationally connected with the lower supporting seat 2, one end of the rotating shaft 8 is provided with the first motor 9, the other end of the rotating shaft 8 is provided with the ratchet wheel 10, the pawl 11 which is matched with the ratchet wheel 10 is arranged on the outer wall of the lower supporting seat 2, the rotating shaft 8 is in transmission connection with the first motor 9, two lower drums 12 which are matched with the two guiding ropes 7 are arranged on the rotating shaft 8, two strip-shaped holes which are matched with the two guiding ropes 7 are arranged at the top of the lower supporting seat 2, the strip-shaped holes are communicated with the cavity 29, and one end of each guiding rope 7 enters the cavity 29 through the strip-shaped holes and is fixedly connected with one lower drum 12. The ratchet 10 cooperates with the pawl 11 to prevent the guide rope 7 wound around the lower drum 12 from falling off.
Two support columns 5 are fixedly arranged on the lower support seat 2, a support tube 28 is hinged to the upper end of each support column 5, the support tube 28 is arranged obliquely above the lower winding drum 12, and each guide rope 7 passes through one support tube 28 and is fixed on one connecting buckle 20. The support pipe 28 supports the guide rope 7 and the inclination of the support pipe 28 can be automatically adjusted according to the change of the inclination of the guide rope 7.
In order to support the support column 5 to enhance the stability thereof, one side of the support column 5, which is close to the lower support seat 2, is provided with a support rod 6, one end of the support rod 6 is fixedly connected with the upper portion of the support column 5, and the other end of the support rod 6 is fixedly connected with the lower support seat 2.
Two sides of the lifting hopper 13 are respectively provided with a guide sleeve 14, each guide rope 7 penetrates through one guide sleeve 14, and each guide sleeve 14 is arranged between one supporting tube 28 and one connecting buckle 20.
Specifically, a waist-shaped hole 25 is formed in the outer wall of the lifting hopper 13, the center line of the waist-shaped hole 25 is arc-shaped, one end of the guide sleeve 14 is hinged to the lifting hopper 13, two locking bolts 24 are arranged on two sides of the other end of the guide sleeve 14, and the two locking bolts 24 respectively penetrate through the waist-shaped hole 25 and connect the other end of the guide sleeve 14 with the lifting hopper 13. The angle of the guide sleeve 14 can be adjusted and locked through the locking bolt 24, the axial lead of the guide sleeve 14 can be ensured to be always parallel to the guide rope 7, and the lifting fluency can be ensured. In order to be able to facilitate the unloading, a discharge door is provided on a side of the lifting hopper 13 remote from the support column 5.
The upper support seat comprises a bottom support 1, a rectangular support frame 16, a horizontal support 18 and a vertical support 19, wherein the rectangular support frame 16 is arranged at one end of the bottom support 1, the horizontal support 18 is arranged at the top of one side of the rectangular support frame 16, the vertical support 19 is fixed between the horizontal support 18 and the bottom support 1, and two connecting buckles 20 which are adaptive to the two guide ropes 7 are arranged at the upper part of the vertical support 19.
The hoisting rope winding and unwinding device comprises a second motor 23, a supporting shaft, an upper winding drum 21 and two supports 22, wherein the two supports 22 are fixed at one end, far away from the rectangular supporting frame 16, of the top of the horizontal bracket 18, the supporting shaft is rotationally connected with the two supports 22, the upper winding drum 21 which is matched with the hoisting rope 15 is fixedly arranged on the supporting shaft, the second motor 23 is arranged at the top of the horizontal bracket 18, the second motor 23 is in transmission connection with the supporting shaft, and winding and unwinding of the hoisting rope 15 are realized by driving the second motor 23.
As shown in fig. 5, the middle parts of two ends of the rectangular supporting frame 16 are respectively provided with a telescopic frame 17, the telescopic frames 17 comprise two telescopic rods which are arranged in parallel, a connecting rod is arranged between the two telescopic rods, and the telescopic frames 17 at two ends of the rectangular supporting frame 16 are lengthened, so that the telescopic frames 17 are contacted with posts on a building, and the upper supporting seat can be prevented from sliding off from between the two posts.
In order to prevent the retraction of the telescopic frame 17 and to further enhance the stability of the upper support, the end of the telescopic frame 17 remote from the rectangular support frame 16 is provided with a mounting plate 26 on which a fixing bolt 27 is provided, and after the telescopic frame 17 is extended, the fixing bolt 27 is fixed to a post of a building.
The specific use process is as follows: the bottom of lower supporting seat 2 is equipped with a plurality of pre-buried screwed pipe 3, and the welding has a plurality of horizontal pole on the outer wall of pre-buried screwed pipe 3, and pre-buried screwed pipe 3 passes through concrete placement on the bottom surface of one side of building, is equipped with the rag bolt 4 that suits with pre-buried screwed pipe 3 on the lower supporting seat 2, and lower supporting seat 2 passes through rag bolt 4 fixed mounting subaerial. One end of the guide rope 7 is fixed on the lower winding drum 12, the other end of the guide rope is fixed on the connecting buckle 20, the telescopic frames 17 at two ends of the rectangular supporting frame 16 are lengthened, the telescopic frames 17 are in contact with the pillars on the building, the upper supporting seat can be prevented from sliding off from the two pillars, the first motor 9 is started, the lower winding drum 12 is driven to rotate, the guide rope 7 can be tensioned, the telescopic frames 17 are in tight contact with the pillars, the telescopic frames 17 can be prevented from falling off from the pillars, the installation stability of the upper supporting seat is guaranteed, and the fixing bolts 27 can be fixed on the pillars of the building to further prevent the telescopic frames 17 from retracting. The lifting hopper 13 can slide along the guide ropes 7, the guide is provided for the movement of the lifting hopper 13 by utilizing the two guide ropes 7, the movement track of the lifting hopper 13 is fixed on the guide ropes 7, the lifting hopper 13 can be prevented from shaking in the lifting process, the lifting rope 15 is positioned between the two guide ropes 7, the second motor 23 is started, the upper winding drum 21 can be driven to rotate, the lifting of the lifting hopper 13 is further completed, the lifting hopper 13 can be effectively prevented from shaking in the lifting process, the stability is high, the building is not damaged, and the construction safety is ensured.
The principles and embodiments of the present invention have been described in this specification with reference to specific examples, the description of which is only for the purpose of aiding in understanding the method of the present invention and its core ideas; also, it is within the scope of the present invention to be modified by those of ordinary skill in the art in light of the present teachings. In view of the foregoing, this description should not be construed as limiting the invention.
Claims (6)
1. The lifting device for building construction is characterized by comprising an upper supporting seat, a lower supporting seat, a lifting hopper, lifting ropes and two guide ropes, wherein the upper supporting seat is used for being installed in a building, the lower supporting seat is used for being fixedly installed on the ground, a guide rope winding and unwinding device is arranged in the lower supporting seat, the guide rope winding and unwinding device is connected with the guide ropes and used for controlling winding and unwinding of the guide ropes, the upper supporting seat is provided with the lifting rope winding and unwinding device, the lifting rope winding and unwinding device is connected with the lifting ropes and used for controlling winding and unwinding of the lifting ropes, the upper supporting seat is provided with two connecting buckles, the connecting buckles are arranged at the lower ends of the lifting rope winding and unwinding device, each guide rope is fixedly connected with one connecting buckle, two sides of the lifting hopper are respectively in sliding connection with the two guide ropes, and the middle part of the upper edge of the lifting hopper is fixedly connected with the lifting ropes;
the guide rope winding and unwinding device comprises a first motor, a rotating shaft, a ratchet wheel, pawls and two lower drums, wherein a cavity is formed in the bottom of each lower supporting seat, the rotating shaft is horizontally arranged in each cavity, the rotating shaft penetrates through each lower supporting seat and is in rotating connection with the corresponding lower supporting seat, one end of each rotating shaft is provided with the first motor, the other end of each rotating shaft is provided with the corresponding ratchet wheel, the outer wall of each lower supporting seat is provided with the corresponding pawl, the rotating shaft is in transmission connection with the corresponding first motor, two lower drums corresponding to two guide ropes are arranged on the rotating shaft, two strip-shaped holes corresponding to the two guide ropes are formed in the top of each lower supporting seat, each strip-shaped hole is communicated with each cavity, and one end of each guide rope is fixedly connected with one lower drum after entering the corresponding cavity through each strip-shaped hole; two sides of the lifting hopper are respectively provided with a guide sleeve, and each guide rope penetrates through one guide sleeve; the outer wall of the lifting hopper is provided with a waist-shaped hole, the central line of the waist-shaped hole is arc-shaped, one end of the guide sleeve is hinged with the lifting hopper, two locking bolts are arranged on two sides of the other end of the guide sleeve, and the two locking bolts respectively penetrate through the waist-shaped hole and connect the other end of the guide sleeve with the lifting hopper;
the upper supporting seat comprises a bottom bracket, a rectangular supporting frame, a horizontal bracket and a vertical bracket, wherein one end of the bottom bracket is provided with the rectangular supporting frame, the top of one side of the rectangular supporting frame is provided with the horizontal bracket, the vertical bracket is fixed between the horizontal bracket and the bottom bracket, and the upper part of the vertical bracket is provided with two connecting buckles which are adaptive to two guide ropes; the hoisting rope winding and unwinding device comprises a second motor, a supporting shaft, an upper winding drum and two supports, wherein two supports are fixed at one end, far away from the rectangular supporting frame, of the top of the horizontal support, the supporting shaft is rotationally connected with the two supports, the upper winding drum which is adaptive to the hoisting rope is fixedly arranged on the supporting shaft, the second motor is arranged at the top of the horizontal support, and the second motor is in transmission connection with the supporting shaft; the middle parts of two ends of the rectangular supporting frame are respectively provided with a telescopic frame, each telescopic frame comprises two telescopic rods which are arranged in parallel, and a connecting rod is arranged between the two telescopic rods.
2. The building construction lifting device according to claim 1, wherein two support columns are fixedly arranged on the lower support seat, a support tube is hinged to the upper end of each support column, the support tube is arranged obliquely above the lower winding drum, and each guide rope penetrates through one support tube and is fixed to one connecting buckle.
3. The construction hoist device of claim 2, characterized in that each guide sleeve is disposed between one of the support tubes and one of the connector links.
4. A construction lifting device according to claim 3, wherein a discharge door is provided on a side of the lifting hopper remote from the support column.
5. The building construction lifting device according to claim 2, wherein a stay bar is arranged on one side of the support column, which is close to the lower support seat, one end of the stay bar is fixedly connected with the upper portion of the support column, and the other end of the stay bar is fixedly connected with the lower support seat.
6. The building construction lifting device according to claim 1, wherein a mounting plate is arranged at one end of the telescopic frame away from the rectangular supporting frame, and a fixing bolt is arranged on the mounting plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810926986.3A CN109230279B (en) | 2018-08-15 | 2018-08-15 | Building construction hoisting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810926986.3A CN109230279B (en) | 2018-08-15 | 2018-08-15 | Building construction hoisting device |
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| CN109230279A CN109230279A (en) | 2019-01-18 |
| CN109230279B true CN109230279B (en) | 2023-08-11 |
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| CN201810926986.3A Active CN109230279B (en) | 2018-08-15 | 2018-08-15 | Building construction hoisting device |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110694189A (en) * | 2019-10-22 | 2020-01-17 | 中交二公局第二工程有限公司 | High-altitude inclined escape system and escape method thereof |
| CN111747038A (en) * | 2020-06-19 | 2020-10-09 | 叶延森 | Conveying equipment for constructional engineering and conveying method thereof |
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