CN112456312A - Lifting hook mechanism with automatic shielding and protecting functions and crane - Google Patents
Lifting hook mechanism with automatic shielding and protecting functions and crane Download PDFInfo
- Publication number
- CN112456312A CN112456312A CN202110109760.6A CN202110109760A CN112456312A CN 112456312 A CN112456312 A CN 112456312A CN 202110109760 A CN202110109760 A CN 202110109760A CN 112456312 A CN112456312 A CN 112456312A
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- CN
- China
- Prior art keywords
- trigger
- shielding
- pull rod
- plate
- hook
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C1/00—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles
- B66C1/10—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles by mechanical means
- B66C1/22—Rigid members, e.g. L-shaped members, with parts engaging the under surface of the loads; Crane hooks
- B66C1/34—Crane hooks
- B66C1/36—Crane hooks with means, e.g. spring-biased detents, for preventing inadvertent disengagement of loads
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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
- B66C13/00—Other constructional features or details
- B66C13/04—Auxiliary devices for controlling movements of suspended loads, or preventing cable slack
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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
- B66C13/00—Other constructional features or details
- B66C13/18—Control systems or devices
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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
- B66C15/00—Safety gear
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Automation & Control Theory (AREA)
- Control And Safety Of Cranes (AREA)
- Load-Engaging Elements For Cranes (AREA)
Abstract
The invention relates to the technical field of hoisting equipment, in particular to a hoisting hook mechanism with an automatic shielding and protecting function and a crane, wherein the hoisting hook mechanism comprises a front side plate and a rear side plate, a roller positioned above and a hoisting hook positioned below are arranged between the two side plates, and the side surfaces of the two side plates, which are far away from each other, are respectively provided with a movable shielding assembly and a trigger assembly; the movable shielding component comprises a shielding plate and an electric winch, and a winch rope of the electric winch is in traction connection with the shielding plate; the trigger assembly comprises a guide pipe and a pull rod, a trigger piece is arranged at the upper end of the pull rod, a drag hook is arranged at the lower end of the pull rod, an elastic contraction piece is arranged between the pull rod and the guide pipe, and a take-up trigger switch and a pay-off trigger switch are arranged on the trigger piece in the vertical stroke; the side plate is also provided with a storage battery. The invention can conveniently shield and protect the open container when the open container is lifted, and does not need manual additional operation.
Description
Technical Field
The invention relates to the technical field of hoisting equipment, in particular to a hoisting hook mechanism with an automatic shielding and protecting function and a crane.
Background
The hoisting machine is widely applied to various fields, such as building, freight transportation, equipment construction and installation, and the like, and most hoisting machines basically comprise a supporting part, a moving part, a lifting part and a hoisting hook for directly hanging a target, wherein the lifting part drives the hoisting hook to move up and down so as to realize transfer, lifting and falling of the target.
The hoisting equipment is widely applied both outdoors and indoors, the working environment is more complicated and changeable in the outdoor environment, the hoisting operation progress and the target safety are influenced by more external factors, particularly, under the condition of severe surrounding environment, the target lifted by the lifting hook needs to be subjected to the invasion of factors such as rain, sun exposure or sundries knocking, smashing, mixing and the like in the air, especially, when the open container containing materials is hoisted outdoors, if the open container is not protected, the materials are easy to reduce the quality due to the influence of the factors and influence the quality of hoisting operation, the conventional method of adding the sealing cover on the open container increases the workload of lifting operation, the taking out and loading of materials in the container need additional work, and the structure of the open container also has higher requirements, so that the development of a lifting hook mechanism which can shield and protect the open container while lifting the open container is necessary.
Disclosure of Invention
The invention provides a lifting hook mechanism with an automatic shielding and protecting function, which aims to solve the problem that the existing lifting hook mechanism cannot shield and protect an open container when the existing lifting hook mechanism lifts the open container. Simultaneously, a crane comprising the lifting hook mechanism is also provided.
The invention relates to a lifting hook mechanism with an automatic shielding and protecting function, which adopts the following technical scheme:
a lifting hook mechanism with an automatic shielding and protecting function comprises a front side plate and a rear side plate, wherein an upper roller and a lower lifting hook are arranged between the two side plates, and the sides of the two side plates, which are far away from each other, are provided with a movable shielding assembly and a triggering assembly; the movable shielding assembly comprises a shielding plate, one end of the shielding plate is rotatably installed on the corresponding side plate, a rotating shaft of the shielding plate extends along the left-right direction, an electric winch is arranged at the upper end of the corresponding side plate, and a winch rope of the electric winch is in traction connection with the shielding plate; the trigger assembly comprises a guide pipe extending along the vertical direction, a pull rod is assembled in the guide pipe in a vertically guiding sliding mode, the upper end of the pull rod extends upwards out of the guide pipe and is provided with a trigger part extending along the left-right direction, the lower end of the pull rod stretches downwards and is provided with a drag hook, the drag hook corresponds to the lifting hook in the front-rear direction, the hook bottom of the drag hook is positioned above the hook bottom of the lifting hook, a blocking platform is arranged at the lower part of the guide pipe of the pull rod, an elastic contraction part is arranged between the blocking platform and the guide pipe, a take-up trigger switch is arranged at the upper end of the vertical stroke of the trigger part, a pay-off trigger switch is arranged at the lower end of the trigger part, and the pay-off trigger switch and the take-up trigger switch are fixedly installed on corresponding side plates and; and the side plate is also provided with a storage battery for supplying power to the paying-off trigger switch, the taking-up trigger switch and the electric winch.
The stand pipe of every trigger subassembly all controls side by side and respectively sets up one, thereby two pull rods of the fender platform interconnect of the pull rod in two stand pipes are a body structure, the drag hook is located the lower extreme that keeps off the platform, trigger about for both ends respectively with two pull rod fixed connection's horizontal pole.
The elastic contraction part is an extension spring, and the upper end and the lower end of the extension spring are fixedly connected with the corresponding guide pipe and the corresponding blocking platform respectively.
The shielding plate comprises a frame and a plate body fixed on the frame, and the end part of the corresponding hoisting rope is connected with the frame in a traction manner.
The plate body is a transparent plastic plate.
The crane adopts the following technical scheme:
a crane comprises a supporting part, a moving part, a lifting part and a lifting hook mechanism with an automatic shielding and protecting function, wherein the lifting hook mechanism comprises a front side plate and a rear side plate, an upper roller and a lower lifting hook are arranged between the two side plates, and a movable shielding assembly and a trigger assembly are arranged on the side surfaces, far away from each other, of the two side plates; the movable shielding assembly comprises a shielding plate, one end of the shielding plate is rotatably installed on the corresponding side plate, a rotating shaft of the shielding plate extends along the left-right direction, an electric winch is arranged at the upper end of the corresponding side plate, and a winch rope of the electric winch is in traction connection with the shielding plate; the trigger assembly comprises a guide pipe extending along the vertical direction, a pull rod is assembled in the guide pipe in a vertically guiding sliding mode, the upper end of the pull rod extends upwards out of the guide pipe and is provided with a trigger part extending along the left-right direction, the lower end of the pull rod stretches downwards and is provided with a drag hook, the drag hook corresponds to the lifting hook in the front-rear direction, the hook bottom of the drag hook is positioned above the hook bottom of the lifting hook, a blocking platform is arranged at the lower part of the guide pipe of the pull rod, an elastic contraction part is arranged between the blocking platform and the guide pipe, a take-up trigger switch is arranged at the upper end of the vertical stroke of the trigger part, a pay-off trigger switch is arranged at the lower end of the trigger part, and the pay-off trigger switch and the take-up trigger switch are fixedly installed on corresponding side plates and; and the side plate is also provided with a storage battery for supplying power to the paying-off trigger switch, the taking-up trigger switch and the electric winch.
The stand pipe of every trigger subassembly all controls side by side and respectively sets up one, thereby two pull rods of the fender platform interconnect of the pull rod in two stand pipes are a body structure, the drag hook is located the lower extreme that keeps off the platform, trigger about for both ends respectively with two pull rod fixed connection's horizontal pole.
The elastic contraction part is an extension spring, and the upper end and the lower end of the extension spring are fixedly connected with the corresponding guide pipe and the corresponding blocking platform respectively.
The shielding plate comprises a frame and a plate body fixed on the frame, and the end part of the corresponding hoisting rope is connected with the frame in a traction manner.
The plate body is a transparent plastic plate.
The invention has the beneficial effects that: the movable shielding component and the trigger component can shield and protect an open container when the open container is lifted, after a lifting rope on the open container is hooked by a lifting hook, the lifting rope on the front side and the rear side of the lifting hook presses down a draw hook of the trigger component to drive the trigger component to trigger a pay-off trigger switch, the pay-off trigger switch starts an electric winch to pay off through a circuit, a shielding plate can be turned downwards to a set position at the moment, the shielding plate is shielded above the open container at the moment, the automatic shielding and protecting effect is realized, after the container is conveyed to a target position, the lifting hook releases the lifting of the lifting rope, the draw hook returns upwards under the action of an elastic contraction piece to drive the trigger component to trigger a take-up trigger switch, the take-up trigger switch starts the electric winch to take up through the circuit to perform a take-up action, and at the moment, the shielding plate can, the shielding protection is removed, so that the open container can be conveniently shielded and protected when lifted, and manual additional operation is not needed.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art 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 for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a front view of an embodiment of a hook mechanism with automatic shade protection of the present invention;
FIG. 2 is a right side view corresponding to FIG. 1;
FIG. 3 is a schematic view of the shielding state corresponding to FIG. 2;
in the figure: 1. the device comprises a side plate, 11, a lifting hook, 12, rollers, 2, a frame, 21, a plate body, 3, an electric winch, 31, a winch rope, 4, a guide pipe, 41, a pull rod, 42, a cross rod, 43, a tension spring, 44, a blocking platform, 45, a draw hook, 5, a take-up trigger switch, 51, a pay-off trigger switch, 6, a storage battery, 7 and a lifting rope.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
According to the embodiment of the lifting hook 11 mechanism with the automatic shielding function, as shown in fig. 1 to 3, the lifting hook 11 mechanism with the automatic shielding function comprises a front side plate 1 and a rear side plate 1, a roller 12 positioned above and a lifting hook 11 positioned below are arranged between the two side plates 1, and movable shielding assemblies and trigger assemblies are arranged on the side surfaces, far away from each other, of the two side plates 1.
The movable shielding component comprises a shielding plate with one end rotatably mounted on the corresponding side plate 1, a rotating shaft of the shielding plate extends along the left-right direction, an electric winch 3 is arranged at the upper end of the corresponding side plate 1, and a winch rope 31 of the electric winch 3 is connected with the shielding plate in a traction manner.
The trigger assembly comprises a guide pipe 4 extending along the vertical direction, a pull rod 41 is assembled in the guide pipe 4 in a vertically-guiding sliding mode, the upper end of the pull rod 41 upwards extends out of the guide pipe 4 and is provided with a trigger part extending along the left-right direction, the lower end of the pull rod is downwards suspended and extends and is provided with a drag hook 45, the drag hook 45 corresponds to the front and the back of the lifting hook 11 in the front-back direction, the hook bottom of the drag hook 45 is located above the hook bottom of the lifting hook 11, a blocking platform 44 is arranged at the position of the lower part of the guide pipe 4 of the pull rod 41, an elastic contraction part is arranged between the blocking platform 44 and the guide pipe 4, a take-up trigger switch 5 is arranged at the upper end of the upper-lower stroke of the trigger part, a pay-off trigger switch 51 is arranged at the lower end.
The side plate 1 is also provided with a storage battery 6 for supplying power to the paying-off trigger switch 51, the taking-up trigger switch 5 and the electric winch 3.
Above, electric hoist 3 is ordinary small-size hoist engine that has the locking function, receives line trigger switch 5 and unwrapping wire trigger switch 51 and controls the trigger switch of the motor corotation or the reversal of electric hoist engine 3 promptly, and the receipts line of electric hoist engine 3 and the operating time realization of unwrapping wire length accessible timing circuit control motor, above equipment are prior art or prior art and realize easily, and the event is no longer repeated.
Further, in order to make the operation of the pull rod 41 more stable and prevent the excessive sliding of the pull rod 41, the guide tubes 4 of each trigger assembly are arranged side by side in a left-right direction, thereby the two pull rods 41 are connected with each other by the baffle table 44 of the pull rod 41 in the two guide tubes 4 to form an integral structure, the draw hook 45 is arranged at the lower end of the baffle table 44, and the trigger is a cross rod 42 which is fixedly connected with the two pull rods 41 at the left end and the right end respectively.
Further, the elastic contracting member is an extension spring 43 whose upper and lower ends are fixedly connected with the corresponding guide tube 4 and the stop table 44, respectively. In other embodiments, resilient rubber ribs may be used.
Further, in order to smoothly pull the cover, the cover includes a frame 2 and a plate body 21 fixed to the frame 2, and ends of respective winding ropes 31 are connected to the frame 2 in a pulling manner.
Further, in order to conveniently check the working conditions of each component and reduce the weight of the plate body 21, the plate body 21 is made of a transparent plastic plate.
The movable shielding component and the trigger component can shield and protect an open container when the open container is lifted, after a lifting hook 11 hooks a lifting rope 7 on the open container, the lifting rope 7 on the front side and the rear side of the lifting hook 11 presses down a draw hook 45 of the trigger component to drive the trigger component to trigger a pay-off trigger switch 51, the pay-off trigger switch 51 starts an electric hoist 3 to pay off through a circuit, a shielding plate can be turned downwards to a set position at the moment, the shielding plate is shielded above the open container at the moment, the automatic shielding effect is realized, after the open container is conveyed to a target position, the lifting hook 11 releases the lifting of the lifting rope 7, the draw hook 45 returns upwards under the action of an elastic contraction member to drive the trigger component to trigger a take-up trigger switch 5, the take-up trigger switch 5 starts the electric hoist 3 to take up through the circuit, and the shielding plate can be turned upwards to the set initial position at the moment, the shielding protection is removed, so that the open container can be conveniently shielded and protected when lifted, and manual additional operation is not needed.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (10)
1. The utility model provides a jack-up hook mechanism with automatically, shelter from safeguard function which characterized in that: the shielding device comprises a front side plate and a rear side plate, wherein an upper roller and a lower lifting hook are arranged between the two side plates, and the sides of the two side plates, which are far away from each other, are provided with a movable shielding assembly and a triggering assembly;
the movable shielding assembly comprises a shielding plate, one end of the shielding plate is rotatably installed on the corresponding side plate, a rotating shaft of the shielding plate extends along the left-right direction, an electric winch is arranged at the upper end of the corresponding side plate, and a winch rope of the electric winch is in traction connection with the shielding plate;
the trigger assembly comprises a guide pipe extending along the vertical direction, a pull rod is assembled in the guide pipe in a vertically guiding sliding mode, the upper end of the pull rod extends upwards out of the guide pipe and is provided with a trigger part extending along the left-right direction, the lower end of the pull rod stretches downwards and is provided with a drag hook, the drag hook corresponds to the lifting hook in the front-rear direction, the hook bottom of the drag hook is positioned above the hook bottom of the lifting hook, a blocking platform is arranged at the lower part of the guide pipe of the pull rod, an elastic contraction part is arranged between the blocking platform and the guide pipe, a take-up trigger switch is arranged at the upper end of the vertical stroke of the trigger part, a pay-off trigger switch is arranged at the lower end of the trigger part, and the pay-off trigger switch and the take-up trigger switch are fixedly installed on corresponding side plates and;
and the side plate is also provided with a storage battery for supplying power to the paying-off trigger switch, the taking-up trigger switch and the electric winch.
2. The lifting hook mechanism with the automatic shielding function according to claim 1, characterized in that: the stand pipe of every trigger subassembly all controls side by side and respectively sets up one, thereby two pull rods of the fender platform interconnect of the pull rod in two stand pipes are a body structure, the drag hook is located the lower extreme that keeps off the platform, trigger about for both ends respectively with two pull rod fixed connection's horizontal pole.
3. The lifting hook mechanism with the automatic shielding function according to claim 2, characterized in that: the elastic contraction part is an extension spring, and the upper end and the lower end of the extension spring are fixedly connected with the corresponding guide pipe and the corresponding blocking platform respectively.
4. The lifting hook mechanism with the automatic shielding function according to claim 1, characterized in that: the shielding plate comprises a frame and a plate body fixed on the frame, and the end part of the corresponding hoisting rope is connected with the frame in a traction manner.
5. The lifting hook mechanism with the automatic shielding function according to claim 4, wherein: the plate body is a transparent plastic plate.
6. The utility model provides a crane, includes supporting part, removal portion, promotion portion, its characterized in that: the lifting hook mechanism comprises a front side plate and a rear side plate, a roller positioned above and a lifting hook positioned below are arranged between the two side plates, and the sides of the two side plates, which are far away from each other, are provided with a movable shielding assembly and a trigger assembly;
the movable shielding assembly comprises a shielding plate, one end of the shielding plate is rotatably installed on the corresponding side plate, a rotating shaft of the shielding plate extends along the left-right direction, an electric winch is arranged at the upper end of the corresponding side plate, and a winch rope of the electric winch is in traction connection with the shielding plate;
the trigger assembly comprises a guide pipe extending along the vertical direction, a pull rod is assembled in the guide pipe in a vertically guiding sliding mode, the upper end of the pull rod extends upwards out of the guide pipe and is provided with a trigger part extending along the left-right direction, the lower end of the pull rod stretches downwards and is provided with a drag hook, the drag hook corresponds to the lifting hook in the front-rear direction, the hook bottom of the drag hook is positioned above the hook bottom of the lifting hook, a blocking platform is arranged at the lower part of the guide pipe of the pull rod, an elastic contraction part is arranged between the blocking platform and the guide pipe, a take-up trigger switch is arranged at the upper end of the vertical stroke of the trigger part, a pay-off trigger switch is arranged at the lower end of the trigger part, and the pay-off trigger switch and the take-up trigger switch are fixedly installed on corresponding side plates and;
and the side plate is also provided with a storage battery for supplying power to the paying-off trigger switch, the taking-up trigger switch and the electric winch.
7. The crane according to claim 6, wherein the guide tubes of each trigger assembly are arranged side by side in a left-right direction, the retaining platforms of the pull rods in the two guide tubes are connected with each other so that the two pull rods are in an integral structure, the draw hook is positioned at the lower end of the retaining platform, and the trigger member is a cross rod with the left end and the right end fixedly connected with the two pull rods respectively.
8. The crane as claimed in claim 7, wherein the elastic contracting member is an extension spring having upper and lower ends fixedly connected to the corresponding guide tube and the corresponding stopper respectively.
9. The crane of claim 6 wherein said shroud includes a frame and panels secured to said frame, the ends of the respective hoist ropes being in traction connection with said frame.
10. The crane as claimed in claim 9, wherein the plate body is a transparent plastic plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110109760.6A CN112456312B (en) | 2021-01-27 | 2021-01-27 | Lifting hook mechanism with automatic shielding and protecting functions and crane |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110109760.6A CN112456312B (en) | 2021-01-27 | 2021-01-27 | Lifting hook mechanism with automatic shielding and protecting functions and crane |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112456312A true CN112456312A (en) | 2021-03-09 |
| CN112456312B CN112456312B (en) | 2021-04-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110109760.6A Active CN112456312B (en) | 2021-01-27 | 2021-01-27 | Lifting hook mechanism with automatic shielding and protecting functions and crane |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112456312B (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08303012A (en) * | 1995-05-01 | 1996-11-19 | Misawa Homes Co Ltd | Lifting member bending prevention device for building unit canopy |
| JPH09273312A (en) * | 1996-04-09 | 1997-10-21 | Misawa Homes Co Ltd | Umbrella device for building unit and containing cover for umbrela device |
| US6598831B1 (en) * | 1998-08-06 | 2003-07-29 | Jean-Francois Tardy | Device suspended to a carrier for rescuing people or equipment |
| CN207346998U (en) * | 2017-09-09 | 2018-05-11 | 衡水广厦铁塔制造有限公司 | A kind of additional row hanging hook of new row loop wheel machine |
-
2021
- 2021-01-27 CN CN202110109760.6A patent/CN112456312B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08303012A (en) * | 1995-05-01 | 1996-11-19 | Misawa Homes Co Ltd | Lifting member bending prevention device for building unit canopy |
| JPH09273312A (en) * | 1996-04-09 | 1997-10-21 | Misawa Homes Co Ltd | Umbrella device for building unit and containing cover for umbrela device |
| US6598831B1 (en) * | 1998-08-06 | 2003-07-29 | Jean-Francois Tardy | Device suspended to a carrier for rescuing people or equipment |
| CN207346998U (en) * | 2017-09-09 | 2018-05-11 | 衡水广厦铁塔制造有限公司 | A kind of additional row hanging hook of new row loop wheel machine |
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| Publication number | Publication date |
|---|---|
| CN112456312B (en) | 2021-04-16 |
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Effective date of registration: 20230418 Address after: 230000 b-1018, Woye Garden commercial office building, 81 Ganquan Road, Shushan District, Hefei City, Anhui Province Patentee after: HEFEI WISDOM DRAGON MACHINERY DESIGN Co.,Ltd. Address before: No.699 Pingyuan Road, Xinxiang City, Henan Province Patentee before: HENAN INSTITUTE OF TECHNOLOGY Effective date of registration: 20230418 Address after: Room 2303, Building 67, No. 513 Times Sunshine Avenue, Yuhua District, Changsha City, Hunan Province, 410000 Patentee after: Shi Tingyong Address before: 230000 b-1018, Woye Garden commercial office building, 81 Ganquan Road, Shushan District, Hefei City, Anhui Province Patentee before: HEFEI WISDOM DRAGON MACHINERY DESIGN Co.,Ltd. |
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Effective date of registration: 20230510 Address after: Room 502, 5th Floor, Building 1, Jinyue Industrial Park, No. 319 Linyu Road, Changsha High tech Development Zone, Changsha City, Hunan Province, 410000 Patentee after: Hunan Ruixin Construction Safety Technology Testing Co.,Ltd. Address before: Room 2303, Building 67, No. 513 Times Sunshine Avenue, Yuhua District, Changsha City, Hunan Province, 410000 Patentee before: Shi Tingyong |