CN112520600A - Movable building construction material hoisting device - Google Patents
Movable building construction material hoisting device Download PDFInfo
- Publication number
- CN112520600A CN112520600A CN202011407045.2A CN202011407045A CN112520600A CN 112520600 A CN112520600 A CN 112520600A CN 202011407045 A CN202011407045 A CN 202011407045A CN 112520600 A CN112520600 A CN 112520600A
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- China
- Prior art keywords
- vertical rod
- rod
- frame base
- hinged
- vertical
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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
- B66C23/36—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 mounted on road or rail vehicles; Manually-movable jib-cranes for use in workshops; Floating cranes
- B66C23/48—Manually-movable jib cranes for use in workshops
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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
- B66C23/64—Jibs
-
- 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
Abstract
The invention discloses a movable building construction material lifting device, wherein a longitudinal rod I and a transverse rod I are connected into a frame base, the bottom of the vertical rod I is fixed or hinged to the frame base, the upper part of the vertical rod I is provided with a connecting hole I, two ends of an inclined strut I are respectively fixed or hinged to the frame base and the upper part of the vertical rod I, a weight bag is arranged on the frame base, and a universal wheel is arranged at the bottom of the frame base; the vertical rod II can extend into or be sleeved on the vertical rod I and is provided with a plurality of connecting holes II at intervals, one end of the cross rod II is vertically fixed with the vertical rod II, and the inclined strut II, the cross rod II and the vertical rod II are fixed into a triangular truss structure; the winch is fixed on the frame base through bolts, the fixed pulleys are fixed on the upper end and the lower end of the vertical rod I and the front end and the rear end of the upper part of the cross rod II through the pulley supports, one end of the steel cable is wound on a winding roller of the winch, and the other end of the steel cable is fixed with a lifting hook at one end of the cross rod II through the fixed pulleys; the vertical rod II is fixed with the vertical rod I through bolts penetrating through the connecting holes I and the connecting holes II. The invention has the advantages of simple structure, convenient and fast movement, safety, reliability and high lifting efficiency.
Description
Technical Field
The invention relates to the technical field of building equipment, in particular to a movable building construction material lifting device which is simple in structure, convenient and fast to move, safe and reliable and high in lifting efficiency.
Background
In the building work progress, especially high-rise building construction, traditional turnover material upwards transfers and adopts the platform of unloading and the cooperation handling of construction tower crane, though can accomplish the promotion of essential material, nevertheless because it can not use in the narrow space of floor, the arbitrary building workman that needs relies on the manpower transport, and handling is wasted time and energy and the potential safety hazard is outstanding. Therefore, materials are lifted in short distance by adopting a manual or electric hoist at present, but the position of the hoist is not easy to move, the position of the hoist is required to be frequently changed for the construction of lifting heavy objects in floors, floors or outer walls, and the like, the fixed hoist has poor use flexibility and long turnover time consumption, the construction efficiency is low, and the problem of high falling risk in the lifting process also exists. Certainly, in order to solve the demand that needs frequently move in order to promote the heavy object, also have among the prior art and adopt mobilizable scissors fork hoisting device and planer-type hoisting device, but structure is complicated, complex operation, still exist and promote position ground and need level and smooth, area is wide, can only promote the defect above the base, be difficult to be used for the promotion of indoor staircase, pipe shaft hole and outer wall construction material. Therefore, it is very necessary to develop a building construction material lifting device which has a simple structure, is convenient to move, is safe and reliable, and has a wide application range.
Disclosure of Invention
The invention aims to provide a movable building construction material lifting device which is simple in structure, convenient and fast to move, safe, reliable and high in lifting efficiency.
The invention is realized by the following steps: comprises a lifting fixing frame, an adjustable suspension arm and a lifting device,
the lifting fixing frame comprises a longitudinal rod I, a transverse rod I, a vertical rod I, an inclined strut I, a weight pocket and a universal wheel, wherein the longitudinal rod I and the transverse rod I are fixedly connected to form a frame base, the bottom of the vertical rod I is fixedly or hinged to the frame base, a connecting hole I perpendicular to the length direction is formed in the upper portion of the vertical rod I, one end of the inclined strut I is fixedly connected or hinged to the frame base far away from the vertical rod I, the other end of the inclined strut I is fixedly connected or hinged to the upper portion of the vertical rod I, the weight pocket is arranged on the frame base far away from the vertical rod I, and the universal wheel is arranged at;
the adjustable suspension arm comprises a cross rod II, a vertical rod II and an inclined strut II, the vertical rod II is a rod-shaped structure which can stretch into or be sleeved on the vertical rod I, a plurality of connecting holes II are formed in the vertical rod II at intervals along the axial direction, one end of the cross rod II is vertically and fixedly connected with the upper portion of the vertical rod II, and the inclined strut II is respectively and fixedly connected with the cross rod II and the vertical rod II to form a triangular truss structure;
the lifting equipment comprises a winch, a steel cable, a fixed pulley and a lifting hook, wherein the winch is fixedly arranged on a frame base of a lifting fixing frame through bolts, the fixed pulley is fixedly arranged at the upper end and the lower end of one side of a vertical rod I, which is close to the winch, and at the front end and the rear end of the upper part of a transverse rod II through pulley supports respectively, one end of the steel cable is wound on a winding roller of the winch, and the other end of the steel cable is wound on the fixed pulley and is fixedly connected with the lifting hook arranged at the lower part of one end of the transverse;
and the vertical rod II of the adjustable suspension arm is fixedly connected with the vertical rod I through a bolt penetrating through the connecting hole I and the connecting hole II.
The invention has the beneficial effects that:
1. the lifting fixing frame, the adjustable suspension arm and the lifting equipment are detachably connected, so that the lifting device is simple in structure, easy to assemble and disassemble and convenient to transfer and transport among floors; the universal wheels are arranged under the frame base of the lifting fixing frame, so that the lifting fixing frame can be conveniently moved to a position where materials need to be lifted as required, the turnover time can be obviously shortened, and the construction efficiency can be effectively improved; but also can be through the convenient adjustment davit height of adjustable davit as required, it is comparatively nimble convenient to use.
2. In the lifting fixing frame, the vertical rod I, the frame base and the inclined strut I form a triangular stable supporting structure, the inclined strut II of the adjustable suspension arm, the cross rod II and the vertical rod II form a triangular truss structure, and the vertical rod II of the adjustable suspension arm is connected with the vertical rod I of the lifting fixing frame through bolts, so that the whole structure is safe and reliable; through set up the ballast pocket on the frame base, bear necessary ballast piece during the use, just can effectively prevent to take place to overturn, security when can guaranteeing to use.
3. The adjustable suspension arm is fixedly connected with the vertical rod I of the lifting fixing frame through the bolts penetrating through the connecting holes I and the connecting holes II, so that the direction of the adjustable suspension arm can be forward, backward or laterally backward in multiple directions only by changing the opening angle of the connecting holes I on the vertical rod I, the adjustable suspension arm is particularly suitable for lifting indoor staircases, pipe shaft holes and outer wall construction materials, and the application range is wide.
Therefore, the invention has the advantages of simple structure, convenient movement, safety, reliability and high lifting efficiency.
Drawings
FIG. 1 is a schematic view of the present invention;
FIG. 2 is a second schematic structural diagram of the present invention;
FIG. 3 is a left side view of FIG. 2;
FIG. 4 is a top view of the lifting fixture of FIG. 2;
FIG. 5 is a schematic view of the adjustable suspension arm shown in FIG. 2;
FIG. 6 is a view of one of the lifting fixtures of the present invention;
FIG. 7 is a second embodiment of the present invention;
FIG. 8 is a third embodiment of the present invention;
in the figure: 1-lifting fixing frame, 1-1-longitudinal rod I, 1-2-transverse rod I, 1-3-vertical rod I, 1-4-inclined strut I, 1-5-weight pocket, 1-6-universal wheel, 1-7-connecting hole I, 1-8-anti-tilting plate, 1-9-anti-tilting support leg, 1-10-supporting screw rod, 1-11-supporting rod, 1-11A-connecting screw rod, 1-11B-connecting pipe, 1-11C-adjusting nut, 1-12-inclined strut III, 2-adjustable suspension arm, 2-1-transverse rod II, 2-2-vertical rod II, 2-3-inclined strut II, 2-4-reinforcing rib and 2-5-inclined strut, 2-6-guide pipe, 2-7-connecting hole II, 3-lifting equipment, 3-1-winch, 3-2-steel cable, 3-3-fixed pulley, 3-4-lifting hook and 4-bolt.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
As shown in fig. 1 to 5, the present invention comprises a lifting fixture 1, an adjustable boom 2, a lifting device 3,
the lifting fixing frame 1 comprises a longitudinal rod I1-1, a cross rod I1-2, a vertical rod I1-3, an inclined strut I1-4, a weight pressing pocket 1-5 and a universal wheel 1-6, wherein the longitudinal rod I1-1 and the cross rod I1-2 are fixedly connected to form a frame base, the bottom of the vertical rod I1-3 is fixed or hinged to the frame base, the upper part of the vertical rod I1-3 is provided with a connecting hole I1-7 vertical to the length direction, one end of the inclined strut I1-4 is fixedly connected or hinged to the frame base far away from the vertical rod I1-3, the other end of the inclined strut I1-4 is fixedly connected or hinged to the upper part of the vertical rod I1-3, the weight pressing pocket 1-5 is arranged on the frame base far away from the vertical rod I1-3, and the;
the adjustable suspension arm 2 comprises a cross rod II 2-1, a vertical rod II 2-2 and an inclined strut II 2-3, the vertical rod II 2-2 is a rod-shaped structure which can stretch into or be sleeved on the vertical rod I1-3, a plurality of connecting holes II 2-7 are formed in the rod-shaped structure at intervals along the axial direction, one end of the cross rod II 2-1 is vertically and fixedly connected with the upper portion of the vertical rod II 2-2, and the inclined strut II 2-3 is fixedly connected with the cross rod II 2-1 and the vertical rod II 2-2 respectively to form a triangular truss structure;
the lifting device 3 comprises a winch 3-1, a steel cable 3-2, a fixed pulley 3-3 and a lifting hook 3-4, wherein the winch 3-1 is fixedly arranged on a frame base of the lifting fixing frame 1 through bolts, the fixed pulley 3-3 is fixedly arranged at the upper end and the lower end of one side of the vertical rod I1-3 close to the winch 3-1 and at the front end and the rear end of the upper part of the cross rod II 2-1 through pulley supports respectively, one end of the steel cable 3-2 is wound on a winding roller of the winch 3-1, and the other end of the steel cable 3-2 is wound on the fixed pulley 3-3 and is fixedly connected with the lifting hook 3-4 arranged at the lower part of one end of the cross rod II 2-1 far away;
and the vertical rod II 2-2 of the adjustable suspension arm 2 is fixedly connected with the vertical rod I1-3 through a bolt penetrating through the connecting hole I1-7 and the connecting hole II 2-7.
The weight pockets 1-5 are fixedly arranged on one side of the frame base far away from the vertical rods I1-3, and the weight pockets 1-5 are continuously arranged in a long strip shape along the direction of the longitudinal rods I1-1 of the frame base or are respectively arranged on two sides with the vertical rods I1-3 as centers.
The universal wheels 1-6 are provided with brake devices.
As shown in fig. 2, 3, 4 and 5, at least one side of the upper part of the vertical rod I1-3 is fixedly connected or hinged with an inclined strut III 1-12, and the other end of the inclined strut III 1-12 is fixedly connected or hinged with a frame base at one side of the vertical rod I1-3; the inclined struts I1-4 are respectively arranged on two sides of the vertical rods I1-3, and the distance between the frame base connection points is far greater than that between the vertical rods I1-3.
Reinforcing ribs 2-4 are fixedly arranged between the cross rod II 2-1 and the vertical rod II 2-2 in the triangular truss structure, and at least one inclined support rod 2-5 is fixedly arranged between the cross rod II 2-1 and the inclined support rod II 2-3.
And a guide pipe 2-6 with an opening inclined downwards is fixedly arranged on one side of the inclined strut II 2-3 close to the vertical rod II 2-2.
An anti-tilting hook or an anti-tilting plate 1-8 is arranged at one end, far away from the vertical rod I1-3, of the frame base of the lifting fixing frame 1, and a connecting hole connected with an expansion screw of the ground and/or the wall surface is formed in the anti-tilting plate 1-8.
The frame base of the lifting fixing frame 1 is at least provided with anti-tilting support legs 1-9 with the bottoms higher than universal wheels 1-6 on two sides of the vertical rods I1-3. The anti-tilting support legs 1-9 lift the universal wheels 1-6 off the ground when in use, thereby effectively ensuring the stability when in use and forming stable support to prevent the whole overturn.
As shown in figure 6, one side of the anti-tilt support leg 1-9, which is far away from the connecting point of the frame base, is provided with a vertical threaded hole, and the threaded hole on the anti-tilt support leg 1-9 is connected with a support screw rod 1-10 which is screwed out and has a bottom higher than the universal wheel 1-6.
As shown in figure 7, the anti-roll support legs 1-9 are long rod-shaped structures, one ends of the anti-roll support legs are hinged with the frame base, one sides of the anti-roll support legs 1-9, which are far away from the frame base, are hinged with support rods 1-11, and the other ends of the support rods 1-11 are hinged with vertical rods I1-3. The hinged anti-roll legs 1-9 facilitate stowing while transporting and moving to reduce floor space and avoid interference with other wall studs.
The support rods 1-11 comprise connecting screw rods 1-11A hinged to the vertical rods I1-3 and connecting pipes 1-11B sleeved on one sides of the connecting screw rods 1-11A and the other sides of the connecting screw rods 1-11A are hinged to the anti-tilting support legs 1-9, and adjusting nuts 1-11C used for pushing the connecting pipes 1-11B to move are arranged on the connecting screw rods 1-11A.
As shown in fig. 8, the anti-roll legs 1-9 are long rod-shaped structures, and one end of each anti-roll leg is obliquely hinged with the frame base, the anti-roll legs 1-9 are at least two sections of telescopic structures, and the sections of the telescopic structures can be fixed by screws or clamping pins.
The installation and working process of the invention is as follows:
as shown in fig. 2, 3, 4 and 5, a part of a lifting fixing frame 1, an adjustable suspension arm 2 and a lifting device 3 are manufactured outside the field, the parts are transported to a corresponding floor through a construction elevator, then vertical rods I1-3 are hinged with a frame base, and then inclined struts I1-4 and inclined struts III 1-7 are respectively fixedly connected or hinged with the vertical rods I1-3 and the frame base through bolts to form a complete lifting fixing frame 1; according to the requirement of lifting height, inserting a vertical rod II 2-2 of an adjustable suspension arm 2 into a vertical rod I1-3 for a certain distance, rotating the direction of the adjustable suspension arm 2, and then fixedly connecting the vertical rod I1-3 through a bolt 4 penetrating through a connecting hole I1-7 on the vertical rod I1-3 and a connecting hole II 2-7 on the vertical rod II 2-2; a steel cable 3-2 on a winch 3-1 penetrates through each fixed pulley 3-3 and is finally fixedly connected with a lifting hook 3-4; according to the weight of the hoisting materials, a concrete weight block is manufactured on site or a standard weight iron block of 50kg is processed in a factory in a customized mode and is placed in a weight pocket 1-5, finally the device is pushed to a pre-hoisting position, then the device is braked and positioned through a brake device of a universal wheel 1-6, the installation process is completed, and the dismounting process is not completed. When the lifting device is used for lifting and mounting for the first time, trial lifting is required, and the stability and safety of lifting are ensured.
When the lifting hook is used, the winch 3-1 is controlled to put down the lifting hook 3-4 and hang materials, then the winch 3-1 is started to lift the materials to a specified height, and 2 people can operate the whole process. After the lifting of the materials at one point on the same layer is finished, the brake devices of the universal wheels 1-6 can be unlocked under the condition that the lifting hooks 3-4 are fixed, and the device can be pushed to the next lifting point for braking and positioning. Of course, also can promote the material to the back of take the altitude, with this device with hang the material push to suitable place the point back brake location to accomplish the intraformational transportation of heavy object, with the reduction manual work handling material process.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. A movable building construction material lifting device is characterized by comprising a lifting fixing frame (1), an adjustable suspension arm (2) and a lifting device (3),
the lifting fixing frame (1) comprises a longitudinal rod I (1-1), a transverse rod I (1-2), a vertical rod I (1-3), an inclined strut I (1-4), a weight pocket (1-5) and universal wheels (1-6), wherein the longitudinal rod I (1-1) and the transverse rod I (1-2) are fixedly connected to form a frame base, the bottom of the vertical rod I (1-3) is fixed or hinged to the frame base, the upper portion of the vertical rod I (1-3) is provided with a connecting hole I (1-7) perpendicular to the length direction, one end of the inclined strut I (1-4) is fixedly connected or hinged to the frame base far away from the vertical rod I (1-3), the other end of the inclined strut I (1-4) is fixedly connected or hinged to the upper portion of the vertical rod I (1-3), the weight pocket (1-5) is arranged on the frame base far away, the universal wheels (1-6) are arranged at the bottom of the frame base;
the adjustable suspension arm (2) comprises a cross rod II (2-1), a vertical rod II (2-2) and an inclined strut II (2-3), the vertical rod II (2-2) is a rod-shaped structure which can stretch into or be sleeved on the vertical rod I (1-3), a plurality of connecting holes II (2-7) are formed in the rod-shaped structure at intervals along the axial direction, one end of the cross rod II (2-1) is vertically and fixedly connected with the upper portion of the vertical rod II (2-2), and the inclined strut II (2-3) is respectively and fixedly connected with the cross rod II (2-1) and the vertical rod II (2-2) to form a triangular truss structure;
the lifting device (3) comprises a winch (3-1), a steel cable (3-2), a fixed pulley (3-3) and a lifting hook (3-4), the winch (3-1) is fixedly arranged on the frame base of the lifting fixing frame (1) through bolts, the fixed pulleys (3-3) are respectively and fixedly arranged at the upper end and the lower end of one side of the vertical rod I (1-3) close to the winch (3-1) and the front end and the rear end of the upper part of the cross rod II (2-1) through pulley supports, one end of the steel cable (3-2) is wound on a winding roller of the winch (3-1), and the other end of the steel cable is wound through the fixed pulley (3-3) and is fixedly connected with a lifting hook (3-4) arranged at the lower part of one end, far away from the vertical rod II (2-2), of the cross rod II (2-1);
and a vertical rod II (2-2) of the adjustable suspension arm (2) is fixedly connected with the vertical rod I (1-3) through a bolt penetrating through the connecting hole I (1-7) and the connecting hole II (2-7).
2. The movable building construction material lifting device according to claim 1, characterized in that at least one side of the upper part of the vertical rod I (1-3) is fixedly connected or hinged with a diagonal brace III (1-12), and the other end of the diagonal brace III (1-12) is fixedly connected or hinged with a frame base at one side of the vertical rod I (1-3); the inclined struts I (1-4) are respectively arranged on two sides of the vertical rods I (1-3), and the distance between the frame base connection points is far greater than that between the vertical rod I (1-3) connection points.
3. The movable building construction material lifting device according to claim 1, characterized in that a reinforcing rib (2-4) is fixedly arranged between the cross bar II (2-1) and the vertical bar II (2-2) in the triangular truss structure, and at least one diagonal brace (2-5) is fixedly arranged between the cross bar II (2-1) and the diagonal brace II (2-3).
4. The movable building construction material lifting device according to claim 3, characterized in that the inclined strut II (2-3) is fixedly provided with a guide pipe (2-6) with an opening inclined downwards at one side close to the vertical rod II (2-2).
5. The movable building construction material lifting device according to claim 1, characterized in that the frame base of the lifting fixing frame (1) is provided with an anti-tilting hook or an anti-tilting plate (1-8) at the end far from the vertical rod i (1-3), and the anti-tilting plate (1-8) is provided with a connecting hole connected with an expansion screw of the ground and/or wall.
6. The movable building construction material lifting device according to any one of claims 1 to 5, characterized in that the frame base of the lifting mount (1) is provided with anti-roll feet (1-9) with a bottom higher than the universal wheels (1-6) at least on both sides of the vertical bars I (1-3).
7. The movable building construction material lifting device according to claim 6, wherein a vertical threaded hole is provided at a side of the anti-tilt support leg (1-9) away from the frame base connection point, and a support screw (1-10) screwed out to a position higher than the universal wheel (1-6) in the bottom is connected to the threaded hole of the anti-tilt support leg (1-9).
8. The movable building construction material lifting device according to claim 6, wherein the anti-roll legs (1-9) are long rod-like structures and are hinged with one ends to the frame base, the anti-roll legs (1-9) are hinged with support rods (1-11) on the sides away from the frame base, and the other ends of the support rods (1-11) are hinged with the vertical rods I (1-3).
9. The movable building construction material lifting device according to claim 8, wherein the support rods (1-11) comprise connecting screws (1-11A) hinged with the vertical rods I (1-3), connecting pipes (1-11B) sleeved on one sides of the connecting screws (1-11A) and hinged with the anti-tilting legs (1-9) on the other sides, and adjusting nuts (1-11C) for pushing the connecting pipes (1-11B) to move are arranged on the connecting screws (1-11A).
10. The movable building construction material lifting device according to claim 6, wherein the anti-roll legs (1-9) are long rod-like structures and one end is obliquely hinged with the frame base, the anti-roll legs (1-9) are at least two segments of telescopic structures, and the segments of the telescopic structures can be fixed by screws or bayonet locks.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011407045.2A CN112520600A (en) | 2020-12-04 | 2020-12-04 | Movable building construction material hoisting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011407045.2A CN112520600A (en) | 2020-12-04 | 2020-12-04 | Movable building construction material hoisting device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112520600A true CN112520600A (en) | 2021-03-19 |
Family
ID=74997598
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011407045.2A Pending CN112520600A (en) | 2020-12-04 | 2020-12-04 | Movable building construction material hoisting device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112520600A (en) |
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2020
- 2020-12-04 CN CN202011407045.2A patent/CN112520600A/en active Pending
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