CN109160424A - A kind of slewing crane with spiral arm slewing equipment - Google Patents
A kind of slewing crane with spiral arm slewing equipment Download PDFInfo
- Publication number
- CN109160424A CN109160424A CN201811326196.8A CN201811326196A CN109160424A CN 109160424 A CN109160424 A CN 109160424A CN 201811326196 A CN201811326196 A CN 201811326196A CN 109160424 A CN109160424 A CN 109160424A
- Authority
- CN
- China
- Prior art keywords
- tower crane
- block
- rotatably assorted
- container
- crane base
- 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.)
- Withdrawn
Links
Classifications
-
- 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
- B66C23/16—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 with jibs supported by columns, e.g. towers having their lower end mounted for slewing movements
- B66C23/163—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 with jibs supported by columns, e.g. towers having their lower end mounted for slewing movements where only part of the column rotates, i.e. at least the bottom part is fixed
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Jib Cranes (AREA)
Abstract
The invention discloses a kind of slewing cranes with spiral arm slewing equipment, including tower crane base, the hoisting apparatus being set on the tower crane base, the balancing device being set in the tower crane base and the lifting device being set on the tower crane base, the hoisting apparatus includes the main frame for being fixedly arranged on the tower crane base upper surface and upwardly extending, array is installed with main supporting steel frame in the main frame, the main supporting steel frame upper end is installed with workbench, it is equipped with the primary cavity of opening upwards in the workbench, is equipped with motor in end wall on the downside of the primary cavity；The present apparatus can be such that the boom of crane is rotated in the horizontal direction, relieve the limitation on crane horizontal direction, and operator can be served top automatically, reduce the consumption of tower crane operator physical strength, keep the function of crane more comprehensive.
Description
Technical field
The present invention relates to lifting technique field, specially a kind of slewing crane with spiral arm slewing equipment.
Background technique
Tower crane is essential a kind of lifting equipment on construction site, for hanging reinforcing bar, concrete, wood needed for construction
Stupefied equal construction materials, tower crane work reduce the labour of manpower, improve work efficiency, current tower crane lacks certain rotating dress
It sets, the movement of the object being lifted in the horizontal direction is limited, and affects the work of tower crane, and the operator of tower crane is every
It is secondary just to be entered by stair in the operating room on top, it is very big to the consumption of physical efficiency since tower crane is relatively high, because
What a kind of this boom for needing to design tower crane can rotate, and operator can be served automatically to the crane at top.
Summary of the invention
The purpose of the present invention is to provide a kind of slewing cranes with spiral arm slewing equipment, for overcoming the prior art
In drawbacks described above.
A kind of slewing crane with spiral arm slewing equipment according to the present invention, including tower crane base, be set to it is described
It hoisting apparatus on tower crane base, the balancing device being set in the tower crane base and is set on the tower crane base
Lifting device, the hoisting apparatus include the main frame for being fixedly arranged on the tower crane base upper surface and upwardly extending, the main frame
Array is installed with main supporting steel frame in frame, and the main supporting steel frame upper end is installed with workbench, is equipped with opening in the workbench
Upward primary cavity is equipped with motor in end wall on the downside of the primary cavity, is installed with and upwardly extends on the output shaft of the motor
First transmission shaft, is installed with spur gear on first transmission shaft, the spur gear left end engagement be connected with outer end face with
The primary cavity is rotatably assorted the gear ring of connection, and the spur gear right end engagement is connected with rotating circular disc, and the rotation is justified
Disk center is installed with end wall on the downside of lower end and the primary cavity and is rotatably assorted the support shaft of connection, is equipped with left and right in the workbench
Symmetrical and opening upwards L-type circular grooves, being rotatably assorted in the L-type circular groove, it is solid to be connected with upper end and the rotating circular disc lower end surface
Surely the limited block connected is installed with respectively the boom that both ends extend to the left and right in the workbench, is installed with battle array in the boom
Secondary supporting steel frame for arranging arrangement, sets pulley chamber in the secondary supporting steel frame, and pulley chamber front and back side wall is rotatably assorted connection
There is first pulley axis, the first fixed pulley is installed on the first pulley axis, the workbench upper surface is installed with time frame, institute
It states time frame upper end and is installed with the symmetrical support base in front and back respectively, be rotatably assorted between the support base and be connected with second pulley
Axis, the second fixed pulley is installed on the second pulley axis, and the boom upper end is installed with operating room, the indoor volume of operation
It raises the cable wire other end on machine and is installed with the first link block, first link block lower end is installed with suspension hook, the hoisting apparatus
It can will sling to eminence at noon, and the boom can be made to be rotated in horizontal plane, to make the weight sling in water
It is moved in plane, and moving process is steadily safe, is providing great convenience property of lifting work.
Further technical solution, the balancing device include the secondary type chamber that opening upwards are equipped in the tower crane base,
Side wall is rotatably assorted respectively before and after the secondary type chamber is connected with the second driving shaft that rear end is installed with power source, and described second passes
Drive roll is installed on moving axis, the drive roll is rotatably assorted by conveyer belt is connected with driven roller, the driven rolling
Cylinder axle center is installed with both ends and is rotatably assorted respectively with side wall before and after the secondary type chamber driven shaft of connection, solid on the conveyer belt
The first fixed link equipped with array arrangement, abutting between first fixed link has the second fixed link, in second fixed link
End is installed with the container of opening to the right, and the container right end is installed with rotary shaft by block, is hinged in the rotary shaft
There is rotary sleeve, the rotary sleeve upper end is fixedly connected with chamber door by block, and the container upper surface is installed with the second company
Block is connect, second link block upper end is installed with hanging ring, and the container right end is installed with the first extension block, the chamber door right end
Face is installed with the second extension block, and rope, the balancing device are connected between first extension block and second extension block
The movement being able to drive on the container progress left and right directions, to make the mass centre changing of the tower crane base, described in raising
The stability of tower crane, and when to sling the inconvenient object triggered by the suspension hook, first the object being lifted can be transported
It is sent into the container, then is wherein worked.
Further technical solution, the balancing device include the secondary type chamber that opening upwards are equipped in the tower crane base,
Side wall is rotatably assorted respectively before and after the secondary type chamber is connected with the second driving shaft that rear end is installed with power source, and described second passes
Drive roll is installed on moving axis, the drive roll is rotatably assorted by conveyer belt is connected with driven roller, the driven rolling
Cylinder axle center is installed with both ends and is rotatably assorted respectively with side wall before and after the secondary type chamber driven shaft of connection, solid on the conveyer belt
The first fixed link equipped with array arrangement, abutting between first fixed link has the second fixed link, in second fixed link
End is installed with the container of opening to the right, and the container right end is installed with rotary shaft by block, is hinged in the rotary shaft
There is rotary sleeve, the rotary sleeve upper end is fixedly connected with chamber door by block, and the container upper surface is installed with the second company
Block is connect, second link block upper end is installed with hanging ring, and the container right end is installed with the first extension block, the chamber door right end
Face is installed with the second extension block, and rope, the balancing device are connected between first extension block and second extension block
The movement being able to drive on the container progress left and right directions, to make the mass centre changing of the tower crane base, described in raising
The stability of tower crane, and when to sling the inconvenient object triggered by the suspension hook, first the object being lifted can be transported
It is sent into the container, then is wherein worked.
The beneficial effects of the present invention are: the configuration of the present invention is simple, easy to operate, and when needing tower crane to be worked, work
Personnel take lift and enter in operating room, and first link block is put down in personnel's operation, so that weight is sling, when weight needs
When being moved in the horizontal direction, starting motor drives the rotation of the first transmission shaft, so that turn spur rotates, final band
Dynamic rotating circular disc and ring gear against rotation, rotating circular disc drives limited block to rotate in L-type circular groove, to realize weight in the horizontal direction
On movement, when needing to adjust the position of centre of gravity of tower crane base, rotation second driving shaft drives drive roll rotation, thus logical
It crosses belt and drives driven roller rotation, final to drive the rotation of the first fixed link, the first fixed link drives collection by the second fixed link
Vanning movement, to realize the change of tower crane base center of gravity, the present apparatus can be such that the boom of crane carries out in the horizontal direction
Rotation relieves the limitation on crane horizontal direction, and operator can be served top automatically, reduces tower crane operation
The consumption of personnel's physical strength keeps the function of crane more comprehensive.
Detailed description of the invention
Fig. 1 is overall structure diagram inside a kind of slewing crane with spiral arm slewing equipment of the invention；
Fig. 2 is the enlarged structure schematic diagram of Fig. 1 in the present invention " A "；
Fig. 3 is the enlarged structure schematic diagram of Fig. 1 in the present invention " B ".
Specific embodiment
Referring to Fig.1-3, a kind of slewing crane with spiral arm slewing equipment of embodiment according to the present invention, including tower
Hang pedestal 10, the hoisting apparatus being set on the tower crane base 10, the balancing device being set in the tower crane base 10 with
And it is set to the lifting device on the tower crane base 10, the hoisting apparatus includes being fixedly arranged on 10 upper surface of tower crane base
And the main frame 11 upwardly extended, array is installed with main supporting steel frame 12 in the main frame 11, on the main supporting steel frame 12
End is installed with workbench 13, is equipped with the primary cavity 14 of opening upwards in the workbench 13, in the 14 downside end wall of primary cavity
Equipped with motor 15, the first transmission shaft 16 upwardly extended, first transmission shaft 16 are installed on the output shaft of the motor 15
On be installed with spur gear 17,17 left end of the spur gear engagement is connected with outer end face and 14 company of being rotatably assorted of primary cavity
The gear ring 18 connect, 17 right end of the spur gear engagement are connected with rotating circular disc 19, and 19 center of rotating circular disc is installed with
Lower end and the 14 downside end wall of primary cavity are rotatably assorted the support shaft 20 of connection, be equipped in the workbench 13 bilateral symmetry and
The L-type circular groove 21 of opening upwards, being rotatably assorted in the L-type circular groove 21, it is solid to be connected with upper end and 19 lower end surface of rotating circular disc
Surely the limited block 22 connected, is installed with respectively the boom 23 that both ends extend to the left and right in the workbench 13, in the boom 23
It is installed with the secondary supporting steel frame 24 of array arrangement, pulley chamber 25, the 25 front and back side of pulley chamber are set in the secondary supporting steel frame 24
End wall, which is rotatably assorted, is connected with first pulley axis 26, and the first fixed pulley 27, the work are installed on the first pulley axis 26
13 upper surface of platform is installed with time frame 28, and secondary 28 upper end of frame is installed with the symmetrical support base 29 in front and back, the branch respectively
It is rotatably assorted between support seat 29 and is connected with second pulley axis 30, the second fixed pulley 31, institute are installed on the second pulley axis 30
It states 23 upper end of boom and is installed with operating room 32, the cable wire other end on hoist engine in the operating room 32 is installed with the first connection
Block 33,33 lower end of the first link block are installed with suspension hook 34, and the hoisting apparatus can will be sling to eminence, and energy at noon
Rotate the boom 23 in horizontal plane, to make the weight sling move in the horizontal plane, and moving process is flat
Steady safety is providing great convenience property of lifting work.
Valuably or illustratively, the balancing device includes the secondary type chamber that opening upwards are equipped in the tower crane base 10
35, the secondary 35 front and back side wall of type chamber is rotatably assorted respectively is connected with the second driving shaft 36 that rear end is installed with power source, institute
It states and is installed with drive roll 37 on second driving shaft 36, the drive roll 37 is rotatably assorted by conveyer belt is connected with driven rolling
Cylinder 38,38 axle center of driven roller be installed with both ends be rotatably assorted respectively with the secondary 35 front and back side wall of type chamber connection from
Moving axis 39 is installed with the first fixed link 40 of array arrangement on the conveyer belt, and abutting between first fixed link 40 has the
Two fixed links 41,41 upper end of the second fixed link are installed with the container 42 of opening to the right, and 42 right end of container passes through
Block is installed with rotary shaft 43, is hinged in the rotary shaft 43 and is connected to rotary sleeve 44,44 upper end of rotary sleeve is solid by block
Surely it is connected with chamber door 45,42 upper surface of container is installed with the second link block 46, and 46 upper end of the second link block is fixed
There is hanging ring 47,42 right end of container is installed with the first extension block 48, and 45 right side of chamber door is installed with the second extension block
49, rope 50 is connected between first extension block 48 and second extension block 49, the balancing device is able to drive institute
It states the movement that container 42 carries out on left and right directions and improves the tower crane 10 to make the mass centre changing of the tower crane base 10
Stability first the object being lifted can be transported and when to sling the inconvenient object triggered by the suspension hook 34
Into the container 42, then wherein worked.
Valuably or illustratively, the lifting device includes symmetrically being fixedly arranged on 10 upper end of tower crane base respectively
Face and the limit plate 51 upwardly extended, the limit plate 51 is interior to be equipped with the opposite guide runner 52 in opening left and right, the workbench 13
Interior to be equipped with working chamber 53, the 53 front and back side wall of working chamber is rotatably assorted respectively is connected with the third that rear end is installed with power source
Transmission shaft 54, is installed with rope sleeve 55 on the third transmission shaft 54, the 53 downside end wall of working chamber be connected with opening to
Under rope chamber 56, the rope other end being fixed on the rope sleeve 55 is fixedly connected with lift 57, the lift
57 or so ends are installed with the slider guide 58 with the guide runner 52 sliding connection respectively, change conventional staff's needs
It walks stair to enter in the operating room 32, tower crane staff can be sent in the operating room 32 by the lifting device, subtract
The manual labor of few operator.
When needing tower crane to be worked, staff takes lift 57 and enters in operating room 32, and personnel operate institute
It states the first link block 33 to put down, to sling weight, when weight needs to be moved in the horizontal direction, starts 15 band of motor
Dynamic first transmission shaft 16 rotation, so that turn spur 17 rotates, final that rotating circular disc 19 and gear ring 18 is driven to rotate, rotation circle
Disk 19 drives limited block 22 to rotate in L-type circular groove 21, to realize the movement of weight in the horizontal direction, when needing to adjust tower
When hanging the position of centre of gravity of pedestal 10, rotation second driving shaft 36 drives drive roll 37 to rotate, to be driven by belt driven
Roller 38 rotates, final to drive the rotation of the first fixed link 40, and the first fixed link 40 drives container 42 by the second fixed link 41
It is mobile, to realize the change of 10 center of gravity of tower crane base.
The beneficial effects of the present invention are: the configuration of the present invention is simple, easy to operate, and when needing tower crane to be worked, work
Personnel take lift and enter in operating room, and first link block is put down in personnel's operation, so that weight is sling, when weight needs
When being moved in the horizontal direction, starting motor drives the rotation of the first transmission shaft, so that turn spur rotates, final band
Dynamic rotating circular disc and ring gear against rotation, rotating circular disc drives limited block to rotate in L-type circular groove, to realize weight in the horizontal direction
On movement, when needing to adjust the position of centre of gravity of tower crane base, rotation second driving shaft drives drive roll rotation, thus logical
It crosses belt and drives driven roller rotation, final to drive the rotation of the first fixed link, the first fixed link drives collection by the second fixed link
Vanning movement, to realize the change of tower crane base center of gravity, the present apparatus can be such that the boom of crane carries out in the horizontal direction
Rotation relieves the limitation on crane horizontal direction, and operator can be served top automatically, reduces tower crane operation
The consumption of personnel's physical strength keeps the function of crane more comprehensive.
Those skilled in the art can define, can in the case of not departing from overall spirit of the invention and design
To make the various modifications for above embodiments.It falls within the scope of protection of the present invention.Protection scheme of the invention
It is subject to claims appended hereto.
Claims (3)
1. a kind of slewing crane with spiral arm slewing equipment including tower crane base, is set to rising on the tower crane base
Refitting sets, the balancing device being set in the tower crane base and the lifting device being set on the tower crane base, special
Sign is: the hoisting apparatus includes the main frame for being fixedly arranged on the tower crane base upper surface and upwardly extending, the main frame
Interior array is installed with main supporting steel frame, and the main supporting steel frame upper end is installed with workbench, be equipped in the workbench opening to
On primary cavity, be equipped with motor in end wall on the downside of the primary cavity, the upwardly extended be installed on the output shaft of the motor
One transmission shaft, spur gear is installed on first transmission shaft, and the spur gear left end engagement is connected with outer end face and institute
It states primary cavity to be rotatably assorted the gear ring of connection, the spur gear right end engagement is connected with rotating circular disc, the rotating circular disc
Center is installed with end wall on the downside of lower end and the primary cavity and is rotatably assorted the support shaft of connection, is equipped with left and right pair in the workbench
Claim and the L-type circular groove of opening upwards, being rotatably assorted in the L-type circular groove is connected with upper end and fixes with the rotating circular disc lower end surface
The limited block of connection is installed with respectively the boom that both ends extend to the left and right in the workbench, is installed with array in the boom
Secondary supporting steel frame of arrangement sets pulley chamber in the secondary supporting steel frame, and pulley chamber front and back side wall, which is rotatably assorted, to be connected with
First pulley axis is installed with the first fixed pulley on the first pulley axis, and the workbench upper surface is installed with time frame, described
Secondary frame upper end is installed with the symmetrical support base in front and back respectively, is rotatably assorted between the support base and is connected with second pulley axis,
The second fixed pulley is installed on the second pulley axis, the boom upper end is installed with operating room, the indoor elevator of operation
The cable wire other end on machine is installed with the first link block, and first link block lower end is installed with suspension hook, the hoisting apparatus energy
It will enough sling to eminence at noon, and the boom can be made to be rotated in horizontal plane, to make the weight sling in level
It is moved on face, and moving process is steadily safe, is providing great convenience property of lifting work.
2. a kind of slewing crane with spiral arm slewing equipment according to claim 1, it is characterised in that: the balance
Device includes secondary type chamber that opening upwards are equipped in the tower crane base, the secondary type chamber front and back side wall company of being rotatably assorted respectively
It is connected to the second driving shaft that rear end is installed with power source, drive roll, the drive roll are installed on the second driving shaft
It is rotatably assorted by conveyer belt and is connected with driven roller, the driven roller axle center is installed with both ends respectively and before the secondary type chamber
Rear side end wall is rotatably assorted the driven shaft of connection, is installed with the first fixed link of array arrangement on the conveyer belt, and described first
Abutting between fixed link has the second fixed link, and second fixed link upper end is installed with the container of opening to the right, the packaging
Case right end is installed with rotary shaft by block, is hinged in the rotary shaft and is connected to rotary sleeve, the rotary sleeve upper end passes through block
It is fixedly connected with chamber door, the container upper surface is installed with the second link block, and second link block upper end is installed with hanging ring,
The container right end is installed with the first extension block, and the chamber door right side is installed with the second extension block, first extension block
Rope is connected between second extension block, the balancing device is able to drive the container and carries out on left and right directions
It is mobile, to make the mass centre changing of the tower crane base, the stability of the tower crane is improved, and to sling inconvenient quilt
When the object that the suspension hook triggers, the object being lifted first can be transported into the container, then wherein worked.
3. a kind of slewing crane with spiral arm slewing equipment according to claim 1, it is characterised in that: the balance
Device includes secondary type chamber that opening upwards are equipped in the tower crane base, the secondary type chamber front and back side wall company of being rotatably assorted respectively
It is connected to the second driving shaft that rear end is installed with power source, drive roll, the drive roll are installed on the second driving shaft
It is rotatably assorted by conveyer belt and is connected with driven roller, the driven roller axle center is installed with both ends respectively and before the secondary type chamber
Rear side end wall is rotatably assorted the driven shaft of connection, is installed with the first fixed link of array arrangement on the conveyer belt, and described first
Abutting between fixed link has the second fixed link, and second fixed link upper end is installed with the container of opening to the right, the packaging
Case right end is installed with rotary shaft by block, is hinged in the rotary shaft and is connected to rotary sleeve, the rotary sleeve upper end passes through block
It is fixedly connected with chamber door, the container upper surface is installed with the second link block, and second link block upper end is installed with hanging ring,
The container right end is installed with the first extension block, and the chamber door right side is installed with the second extension block, first extension block
Rope is connected between second extension block, the balancing device is able to drive the container and carries out on left and right directions
It is mobile, to make the mass centre changing of the tower crane base, the stability of the tower crane is improved, and to sling inconvenient quilt
When the object that the suspension hook triggers, the object being lifted first can be transported into the container, then wherein worked.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811326196.8A CN109160424A (en) | 2018-11-08 | 2018-11-08 | A kind of slewing crane with spiral arm slewing equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811326196.8A CN109160424A (en) | 2018-11-08 | 2018-11-08 | A kind of slewing crane with spiral arm slewing equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109160424A true CN109160424A (en) | 2019-01-08 |
Family
ID=64876707
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811326196.8A Withdrawn CN109160424A (en) | 2018-11-08 | 2018-11-08 | A kind of slewing crane with spiral arm slewing equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109160424A (en) |
-
2018
- 2018-11-08 CN CN201811326196.8A patent/CN109160424A/en not_active Withdrawn
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109052186A (en) | A kind of novel slewing crane and its application method with spiral arm slewing equipment | |
| CN211419395U (en) | Telescopic jib loading boom for hoist device | |
| CN106429904A (en) | Autobalance crane | |
| CN205802845U (en) | A kind of civil engineering is with hanging a liter machine | |
| CN204569216U (en) | Small-sized push loop wheel machine | |
| CN207684788U (en) | Hand pulling block frame | |
| CN109160424A (en) | A kind of slewing crane with spiral arm slewing equipment | |
| CN207406013U (en) | A kind of FRAME ON THE ROOF OF HIGH-RISE BUILDING curtain wall lifting device | |
| CN215592450U (en) | Roller maintenance car | |
| CN110331845A (en) | A kind of housing construction platform | |
| CN215798047U (en) | Special crane for grinding roller | |
| CN216444935U (en) | Material lifting machine with high transmission safety | |
| CN214653150U (en) | Equipment for hoisting prefabricated arched tunnel roof structure | |
| CN209098060U (en) | A kind of detachable civil air defense constructions and installations safeguard hanging apparatus | |
| CN110980548A (en) | Maintenance channel for crane | |
| CN210593724U (en) | Stabilizing device for elevator | |
| CN219363073U (en) | Building equipment installs loop wheel machine | |
| CN218988619U (en) | Mother rod lifting device for metal smelting | |
| CN109231027A (en) | A kind of architectural engineering lifting appliance | |
| CN215711243U (en) | Miniature crane for track | |
| CN110817717A (en) | Integrated safe hoisting equipment based on building construction is used | |
| CN220467394U (en) | Material lifting device for building construction | |
| CN216471840U (en) | Rotor magnet yoke lamination device | |
| CN217627270U (en) | Hoisting equipment for building construction based on narrow space | |
| CN212893622U (en) | Material hoisting device with protection effect for building installation |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| WW01 | Invention patent application withdrawn after publication | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20190108 |