CN112479053B - Hoisting equipment for mounting building outer wall - Google Patents
Hoisting equipment for mounting building outer wall Download PDFInfo
- Publication number
- CN112479053B CN112479053B CN202011377607.3A CN202011377607A CN112479053B CN 112479053 B CN112479053 B CN 112479053B CN 202011377607 A CN202011377607 A CN 202011377607A CN 112479053 B CN112479053 B CN 112479053B
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- Prior art keywords
- wall
- piece
- telescopic rod
- base
- frame
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
- B66C23/18—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes specially adapted for use in particular purposes
- B66C23/20—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes specially adapted for use in particular purposes with supporting couples provided by walls of buildings or like structures
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
- B66C23/62—Constructional features or details
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
- B66C23/62—Constructional features or details
- B66C23/72—Counterweights or supports for balancing lifting couples
- B66C23/78—Supports, e.g. outriggers, for mobile cranes
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Conveying And Assembling Of Building Elements In Situ (AREA)
Abstract
The invention discloses hoisting equipment for mounting an outer wall of a building, which relates to the technical field of building equipment and comprises a base, an electric drive, a telescopic rod frame, a hoisting tool and a supporting piece, wherein the upper surface of the base is fixedly connected with the bottom of the electric drive, the upper surface of the front end of the base is fixedly connected with the bottom of the telescopic rod frame, and the hoisting tool is arranged at the top of the front end of the telescopic rod frame. The invention realizes that the L-shaped piece is tightly attached to the right-angle wall at the top of the balcony by adjusting the length of the telescopic rod frame and the distance between the pressure rod and the wall surface at the bottom of the balcony through combining the telescopic rod frame, the support piece and the pressure rod, and the silica gel sucker is pressed down to be tightly attached to the ground through air pressure balance through the downward pressure of the arc-shaped lug at the bottom of the telescopic rod frame and the pressure rod, thereby effectively preventing the accidents of toppling and side turning caused by the sliding between the lifting frame and the ground during the work, effectively avoiding the damage to the ground caused by the sliding of the base on the ground, and having the functions of simple installation and disassembly.
Description
Technical Field
The invention relates to hoisting equipment, relates to the technical field of building equipment, and particularly relates to hoisting equipment for mounting an outer wall of a building.
Background
When finished furniture is transported to home, the finished furniture is often unable to be normally transported to home because of the furniture size being larger than the size of an elevator or a door frame, so that the finished furniture can be transported by using a lifting device from a home balcony. The following problems exist in the prior art:
among the prior art, when furniture or large-scale article carried home from the balcony through the hoist and mount, balcony ground was mostly easy smooth ceramic tile or floor, and the bottom of hoist and mount easily takes place to slide with ground, and the damage ground of flower can be scraped to hoist and mount bottom during the slip, and takes place gliding hoist and mount and easily take place left and right side and incline and fall, has great potential safety hazard.
Disclosure of Invention
The invention provides hoisting equipment for mounting an outer wall of a building, aiming at providing the hoisting equipment which has the function of convenient fixed mounting and solves the problem that the hoisting bottom slides with the ground; wherein another kind of purpose can take place to empty, the problem of turning on one's side in order to solve the hoist and mount during operation to reach the effect of fixed hoist and mount that can be simple and easy safe through house balcony, wherein another kind of purpose is in order to possess the function that does not harm balcony ground, has solved the hoist and mount and has scraped the problem on ground in house balcony space.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows:
the utility model provides a lifting device of building outer wall installation, includes base, electric drive, telescopic link frame, hoist and support piece, the upper surface and the bottom fixed connection of electric drive of base, the front end upper surface of base and the bottom fixed connection of telescopic link frame, the front end top of telescopic link frame is provided with the hoist, the top of telescopic link frame and the bottom swing joint of support frame.
The technical scheme of the invention is further improved as follows: the base is characterized in that pressing rods are arranged on two sides of the bottom of the base and are symmetrically arranged, a push rod is inserted in the axis of each pressing rod, an arc-shaped convex block is arranged on the lower surface of each push rod, a silica gel sucker is movably connected to the bottom of each pressing rod, and a rubber pad is fixedly connected to the lower surface of each pressing rod.
The technical scheme of the invention is further improved as follows: the lower surface axle center department of arc lug has seted up the spout, the bottom swing joint of spout has the top of silica gel sucking disc.
The technical scheme of the invention is further improved as follows: the silica gel sucking disc comprises a sucking disc bottom, a spring and a fixed rod, wherein the top of the sucking disc bottom is movably connected with the lower surface of the fixed rod, the upper surface of the fixed rod is movably connected with one end of the spring, and one end of the fixed rod is connected with the bottom of the pressing rod in an inserting mode.
The technical scheme of the invention is further improved as follows: the support frame comprises a shaped piece, a clamping piece and a guiding clamping piece, the bottom of the clamping piece is inserted into the bottom of the front end of the shaped piece, the bottom of the guiding clamping piece is arranged on one side of the bottom of the clamping piece, the bottom of the rear end of the support frame is movably connected with the top of the rotating shaft, and the bottom of the rotating shaft is movably connected with the bottom of the telescopic rod frame.
The technical scheme of the invention is further improved as follows: the shape piece comprises a shape elastic piece and a turbine spring, the bottom of the shape elastic piece is movably connected with the top of the turbine elastic piece, the shape elastic piece is symmetrically arranged, one end of the shape elastic piece is connected with one side of the shape piece in an inserting mode, and one side of the turbine spring is connected with the bottom of the shape piece in an inserting mode.
The technical scheme of the invention is further improved as follows: the direction fastener includes cardboard, hair pad, leading wheel and compression spring, the bottom of cardboard and turbine spring's top outer wall swing joint, and the cardboard symmetry sets up, the front end of cardboard and the outer wall fixed connection of hair pad, the front end outer wall of cardboard and the rear end swing joint of leading wheel, compression spring's front end and the rear end swing joint of hair pad, the rear end of spring and the rear end fixed connection of cardboard.
Due to the adoption of the technical scheme, compared with the prior art, the invention has the technical progress that:
1. the invention provides a hoisting device for mounting an outer wall of a building, which is ingenious in design, adopts the combination of a telescopic rod frame, a support piece and a pressure rod, realizes that an L-shaped piece is tightly attached to a right-angled wall at the top of a balcony by adjusting the length of the telescopic rod frame and the distance between the pressure rod and the wall at the bottom of the balcony, presses down a silica gel sucker to be tightly attached to the ground through air pressure balance through the downward pressure of an arc-shaped bump at the bottom of the telescopic rod frame and the pressure rod, effectively prevents the accidents of toppling and side turning caused by sliding with the ground when the hoisting device works, and avoids the toppling of the top of the telescopic rod frame from left and right and side turning outside the balcony through the blocking effect of the right-angled wall at the top of the balcony.
2. The invention provides a hoisting device for mounting an outer wall of a building, which is combined and arranged by adopting a telescopic rod frame, a support piece and a pressure rod, can realize that the friction force between a base with a silica gel sucker and the ground is increased by increasing the downward pressure while the base is fixed with a balcony wall, effectively prevents the base from sliding on the ground to scrape and damage the ground, can release the downward pressure applied to a spring to pull up the silica gel sucker by only adjusting the length of the telescopic rod frame and the distance between the pressure rod and the wall after the work is finished, and returns a push rod to the original position by jacking a sliding chute upwards.
Drawings
FIG. 1 is a schematic view of the main structure of the present invention;
FIG. 2 is a schematic view of a base structure of the present invention;
FIG. 3 is a schematic view of the structure of the compression bar of the present invention;
FIG. 4 is a side view of the compression link of the present invention;
FIG. 5 is a rear end view of the support member of the present invention;
FIG. 6 is a side view of the support member of the present invention;
FIG. 7 is a schematic view of the support member of the present invention in use.
In the figure: 1. a base; 2. electrically driving; 3. a telescopic rod frame; 4. a spreader; 30. a support member; 10. a pressure lever; 101. a push rod; c1, arc-shaped convex blocks; 102. a silica gel sucker; 103. a rubber pad; c2, a chute; d1, suction cup bottom; d2, spring; d3, fixing rod; 301. an L-shaped piece; 302. a fastener; 303. a guide clamping piece; a1, L-shaped elastic sheet; a2, turbine elastic sheet; b1, a clamping plate; b2, a hair pad; b3, a guide wheel; b4, compression spring.
Detailed Description
The present invention will be described in further detail with reference to the following examples:
example 1
As shown in fig. 1, 5, 6 and 7, the invention provides a hoisting device for installing an outer wall of a building, which comprises a base 1, an electric drive 2, an expansion rod frame 3, a hanger 4 and a support member 30, wherein the upper surface of the base 1 is fixedly connected with the bottom of the electric drive 2, the upper surface of the front end of the base 1 is fixedly connected with the bottom of the expansion rod frame 3, the hanger 4 is arranged at the top of the front end of the expansion rod frame 3, the top of the expansion rod frame 3 is movably connected with the bottom of a support frame 30, the support frame 30 comprises an L-shaped member 301, a fastener 302 and a guide fastener 303, the bottom of the front end of the L-shaped member 301 is inserted with the bottom of the fastener 302, one side of the bottom of the fastener 302 is provided with the bottom of the guide fastener 303, the bottom of the rear end of the support frame 30 is movably connected with the top of a rotating shaft 31, the bottom of the rotating shaft 31 is movably connected with the bottom of the expansion rod frame 3, the L-shaped member 301 comprises an L-shaped elastic sheet a1 and a turbine spring a2, the bottom of the L-shaped elastic sheet a1 is movably connected with the top of the turbine elastic sheet a2, the L-shaped elastic sheets a1 are symmetrically arranged, one end of the L-shaped elastic sheet a1 is inserted into one side of the L-shaped piece 301, one side of the turbine spring a2 is inserted into the bottom of the L-shaped piece 301, the guide clamping piece 303 comprises a clamping plate b1, a hair pad b2, a guide wheel b3 and a compression spring b4, the bottom of the clamping plate b1 is movably connected with the outer wall of the top of the turbine spring a2, the clamping plate b1 is symmetrically arranged, the front end of the clamping plate b1 is fixedly connected with the outer wall of the hair pad b2, the outer wall of the front end of the clamping plate b1 is movably connected with the rear end of the guide wheel b3, the front end of the compression spring b4 is movably connected with the rear end of the hair pad b2, and the rear end of the spring b4 is fixedly connected with the rear end of the clamping plate b 1.
In this embodiment, firstly, the height of the telescopic rod frame 3 is adjusted, the L-shaped piece 301 of the support member 30 is aligned with the corner of the wall at the top of the balcony, the vertical plate of the L-shaped piece 301 is closely attached to the wall at the rear end in parallel, then the base 1 is pushed to reduce the distance between the front end of the base and the wall at the bottom of the balcony, the height of the telescopic rod frame 3 is continuously adjusted, after the top of the guide clip 303 is contacted with the wall corner, the guide wheel b3 of the guide clip 303 will roll and expand along the wall due to the elastic action of the turbine clip a2, the hair pad b2 and the compression spring b4 prevent the guide clip 303 from scraping and excessively damaging the wall when the guide clip 303 is displaced on the wall, after the top of the L-shaped clip a1 is contacted with the wall corner, the top of the L-shaped clip will also expand and clamp the right-angled wall, through the pressure action of the L-shaped clip and the guide clip 303, the top of the telescopic rod frame 3 will be fixed with the right-angled wall at the top of the balcony, through the block of the support member 30, the lifting device can prevent the balcony from being turned over outwards and left and right during lifting, and protect the wall surface of the balcony from being damaged during lifting through the buffer action.
Example 2
As shown in fig. 1 to 4, on the basis of embodiment 1, the present invention provides a technical solution: the upper surface of a base 1 is fixedly connected with the bottom of an electric drive 2, the upper surface of the front end of the base 1 is fixedly connected with the bottom of a telescopic rod frame 3, a lifting appliance 4 is arranged at the top of the front end of the telescopic rod frame 3, the top of the telescopic rod frame 3 is movably connected with the bottom of a support frame 30, pressure rods 10 are arranged on two sides of the bottom of the base 1, the pressure rods 10 are symmetrically arranged, a push rod 101 is inserted at the axis of the pressure rod 10, an arc-shaped convex block c1 is arranged on the lower surface of the push rod 101, a silica gel sucker 102 is movably connected with the bottom of the pressure rod 10, a rubber pad 103 is fixedly connected with the lower surface of the pressure rod 10, a chute c2 is arranged at the axis of the lower surface of the arc-shaped convex block c1, the top of the silica gel sucker 102 is movably connected with the bottom of the chute c2, the silica gel sucker 102 comprises a sucker bottom d1, a spring d2 and a fixed rod d3, the top of the sucker bottom d1 is movably connected with the lower surface of the fixed rod d3, the fixed rod d3, the upper surface of the fixed rod d3 is movably connected with one end of the spring d2, and one end of the fixing rod d3 is inserted into the bottom of the pressure lever 10.
In this embodiment, when the pressing rod 10 of the base 1 is tightly attached to the bottom wall of the balcony, the pushing rod 101 is pushed into the rear end by the pushing force, and in the process of pushing the pushing rod 101, the arc-shaped protrusion c1 at the bottom will apply downward pressure to the top of the bottom silica gel sucker 102, the top of the silica gel sucker 102 will move downward along the sliding slot c2, and squeeze the spring d2 between the top and the fixed rod d3, and after the silica gel sucker 102 contacts with the ground when pressed downward, the silica gel sucker 102 deforms to squeeze the air at the bottom to form a negative pressure region, and tightly suck the air at the balcony ground by atmospheric pressure, and the telescopic rod frame 3 at the top extrudes the upper and lower walls by adjusting the length, thereby facilitating the adsorption of the bottom silica gel sucker 102 to the ground, when the silica gel sucker 102 and the rubber pad 103 are pressed downward, increasing the friction force between the bottom of the base 1 and the balcony tile surface, and preventing the hanging bottom from sliding and the balcony tile surface from being damaged by scraping, after the hoisting is finished, the adsorption force of the bottom silica gel sucker 102 can be relieved by only adjusting and shortening the length of the telescopic rod frame 3 and the distance between the pressure rod 10 and the bottom wall of the balcony, when the base 1 starts to be far away from the wall, the spring d2 releases the elastic force to pull the silica gel sucker 102 to move upwards, the top of the silica gel sucker 102 generates pressure on the chute c2 of the arc-shaped bump c1, and the arc-shaped bump c1 and the pressure rod 10 at the top of the arc-shaped bump c1 are extruded and extended to return to the initial position.
The working principle of the hoisting equipment for installing the building outer wall is described in detail below.
As shown in fig. 1-7, firstly adjusting the height of the telescopic rod frame 3, aligning the L-shaped piece 301 of the support member 30 with the corner of the wall at the top of the balcony, making the vertical plate of the L-shaped piece 301 closely attached to the wall at the rear end in parallel, then pushing the base 1 to reduce the distance between the front end of the base 1 and the wall at the bottom of the balcony, continuously adjusting the height of the telescopic rod frame 3, after the top of the guide clip 303 touches the wall corner, the guide wheel b3 of the guide clip 303 will roll and expand along the wall due to the elastic force of the turbine clip a2, the hair pad b2 and the compression spring b4 prevent the guide clip 303 from scraping and excessively damaging the wall when the guide clip 303 is displaced on the wall, after the top of the L-shaped clip a1 touches the wall corner, the top will also expand and clamp the right-angled wall due to the pressure effect of the L-shaped clip and the guide clip 303, the top of the telescopic rod frame 3 will be fixed with the right-angled wall at the top of the balcony, by the block of the support member 30, the lifting device can prevent the balcony from being turned over outwards and left and right during lifting, and protect the wall surface of the balcony from being damaged during lifting through the buffer action.
When the pressure lever 10 of the base 1 is tightly attached to the bottom wall of the balcony, the push rod 101 is pushed in towards the rear end due to the pushing force, in the process that the push rod 101 is pushed in, the arc-shaped convex block c1 at the bottom applies downward pressure to the top of the silica gel sucker 102 at the bottom, the top of the silica gel sucker 102 moves downwards along the sliding groove c2 to extrude the spring d2 between the silica gel sucker and the fixed rod d3, and after the silica gel sucker 102 is contacted with the ground when being pressed downwards, the silica gel sucker deforms to extrude the air at the bottom to form a negative pressure area, and the negative pressure area is tightly sucked on the ground of the balcony through the atmospheric pressure, meanwhile, the telescopic rod frame 3 at the top extrudes the upper wall and the lower wall through adjusting the length, so that the silica gel sucker 102 at the bottom is favorably adsorbed on the ground, when the silica gel sucker 102 and the rubber pad 103 are pressed downwards, the friction force between the bottom of the base 1 and the surface of the balcony is increased, so that the sliding of the hoisting bottom and the surface of the balcony tile is favorably prevented from being damaged due to scraping, after the hoisting is finished, the adsorption force of the bottom silica gel sucker 102 can be relieved by only adjusting and shortening the length of the telescopic rod frame 3 and the distance between the pressure rod 10 and the bottom wall of the balcony, when the base 1 starts to be far away from the wall, the spring d2 releases the elastic force to pull the silica gel sucker 102 to move upwards, the top of the silica gel sucker 102 generates pressure on the chute c2 of the arc-shaped bump c1, and the arc-shaped bump c1 and the pressure rod 10 at the top of the arc-shaped bump c1 are extruded and extended to return to the initial position.
The present invention has been described in general terms in the foregoing, but it will be apparent to those skilled in the art that modifications and improvements can be made thereto based on the present invention. Therefore, modifications or improvements are within the scope of the invention without departing from the spirit of the inventive concept.
Claims (4)
1. The utility model provides a lifting device of building outer wall installation, includes base (1), electric drive (2), telescopic link frame (3), hoist (4) and support piece (30), its characterized in that: the upper surface of the base (1) is fixedly connected with the bottom of the electric drive (2), the upper surface of the front end of the base (1) is fixedly connected with the bottom of the telescopic rod frame (3), a lifting appliance (4) is arranged at the top of the front end of the telescopic rod frame (3), and the top of the telescopic rod frame (3) is movably connected with the bottom of the support frame (30);
the supporting frame (30) comprises an L-shaped piece (301), a clamping piece (302) and a guide clamping piece (303), the bottom of the front end of the L-shaped piece (301) is inserted with the bottom of the clamping piece (302), the bottom of the guide clamping piece (303) is arranged on one side of the bottom of the clamping piece (302), the bottom of the rear end of the supporting frame (30) is movably connected with the top of the rotating shaft (31), and the bottom of the rotating shaft (31) is movably connected with the bottom of the telescopic rod frame (3);
the L-shaped piece (301) comprises an L-shaped elastic piece (a1) and a turbine spring (a2), the bottom of the L-shaped elastic piece (a1) is movably connected with the top of the turbine elastic piece (a2), the L-shaped elastic pieces (a1) are symmetrically arranged, one end of the L-shaped elastic piece (a1) is inserted into one side of the L-shaped piece (301), and one side of the turbine spring (a2) is inserted into the bottom of the L-shaped piece (301);
the guide clamping piece (303) comprises a clamping plate (b1), a hair pad (b2), a guide wheel (b3) and a compression spring (b4), the bottom of the clamping plate (b1) is movably connected with the outer wall of the top of a turbine spring (a2), the clamping plate (b1) is symmetrically arranged, the front end of the clamping plate (b1) is fixedly connected with the outer wall of the hair pad (b2), the outer wall of the front end of the clamping plate (b1) is movably connected with the rear end of the guide wheel (b3), the front end of the compression spring (b4) is movably connected with the rear end of the hair pad (b2), and the rear end of the spring (b4) is fixedly connected with the rear end of the clamping plate (b 1).
2. The hoisting equipment for mounting the outer wall of the building as claimed in claim 1, wherein: the base is characterized in that pressing rods (10) are arranged on two sides of the bottom of the base (1), the pressing rods (10) are symmetrically arranged, a push rod (101) is inserted in the axis of the pressing rod (10), an arc-shaped convex block (c1) is arranged on the lower surface of the push rod (101), a silica gel sucker (102) is movably connected to the bottom of the pressing rod (10), and a rubber pad (103) is fixedly connected to the lower surface of the pressing rod (10).
3. The hoisting equipment for mounting the outer wall of the building as claimed in claim 2, wherein: the lower surface axle center department of arc lug (c1) has seted up spout (c2), the bottom swing joint of spout (c2) has the top of silica gel sucking disc (102).
4. The hoisting equipment for mounting the outer wall of the building as claimed in claim 2, wherein: silica gel sucking disc (102) is including sucking disc end (d1), spring (d2) and dead lever (d3), the lower surface swing joint of the top of sucking disc end (d1) and dead lever (d3), the upper surface of dead lever (d3) and the one end swing joint of spring (d2), just the one end of dead lever (d3) is pegged graft with the bottom of depression bar (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011377607.3A CN112479053B (en) | 2020-11-30 | 2020-11-30 | Hoisting equipment for mounting building outer wall |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011377607.3A CN112479053B (en) | 2020-11-30 | 2020-11-30 | Hoisting equipment for mounting building outer wall |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112479053A CN112479053A (en) | 2021-03-12 |
| CN112479053B true CN112479053B (en) | 2022-08-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011377607.3A Active CN112479053B (en) | 2020-11-30 | 2020-11-30 | Hoisting equipment for mounting building outer wall |
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| Country | Link |
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| CN (1) | CN112479053B (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201002928Y (en) * | 2007-01-22 | 2008-01-09 | 宋鹏飞 | Hanging and transporting machine |
| CN201381181Y (en) * | 2009-04-10 | 2010-01-13 | 王德生 | Light-weight lift machine |
| EP3216742A1 (en) * | 2016-03-10 | 2017-09-13 | Ronen Gomani | Crane with automatic adjustable tightening mechanism |
| CN209265191U (en) * | 2018-12-25 | 2019-08-16 | 北京微美云息软件有限公司 | A kind of holographic projector |
-
2020
- 2020-11-30 CN CN202011377607.3A patent/CN112479053B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201002928Y (en) * | 2007-01-22 | 2008-01-09 | 宋鹏飞 | Hanging and transporting machine |
| CN201381181Y (en) * | 2009-04-10 | 2010-01-13 | 王德生 | Light-weight lift machine |
| EP3216742A1 (en) * | 2016-03-10 | 2017-09-13 | Ronen Gomani | Crane with automatic adjustable tightening mechanism |
| CN209265191U (en) * | 2018-12-25 | 2019-08-16 | 北京微美云息软件有限公司 | A kind of holographic projector |
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| Publication number | Publication date |
|---|---|
| CN112479053A (en) | 2021-03-12 |
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