CN216238193U - Passive protective net with buffer function - Google Patents

Passive protective net with buffer function Download PDF

Info

Publication number
CN216238193U
CN216238193U CN202120378973.4U CN202120378973U CN216238193U CN 216238193 U CN216238193 U CN 216238193U CN 202120378973 U CN202120378973 U CN 202120378973U CN 216238193 U CN216238193 U CN 216238193U
Authority
CN
China
Prior art keywords
net
protective net
supporting rope
buffer function
rope
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.)
Expired - Fee Related
Application number
CN202120378973.4U
Other languages
Chinese (zh)
Inventor
李长荣
王秀丽
谢永照
郑中诚
张志强
陈海瑞
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ZHONGJI DEVELOPMENT CONSTRUCTION ENGINEERING CO LTD
Original Assignee
ZHONGJI DEVELOPMENT CONSTRUCTION ENGINEERING CO LTD
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by ZHONGJI DEVELOPMENT CONSTRUCTION ENGINEERING CO LTD filed Critical ZHONGJI DEVELOPMENT CONSTRUCTION ENGINEERING CO LTD
Priority to CN202120378973.4U priority Critical patent/CN216238193U/en
Application granted granted Critical
Publication of CN216238193U publication Critical patent/CN216238193U/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Landscapes

  • Devices Affording Protection Of Roads Or Walls For Sound Insulation (AREA)

Abstract

The application relates to a passive protective net with a buffer function, which comprises a plurality of steel columns fixed on the ground, an upper supporting rope and a lower supporting rope are connected between two adjacent steel columns, a protective net is fixedly arranged between the upper supporting rope and the lower supporting rope, the protective net comprises a left side net and a right side net, a buffer component is fixedly connected between the left side net and the right side net and comprises two vertical rods, a plurality of hinge rods are arranged on the two vertical rods and comprise two inclined rods which are arranged in a crossed manner, two ends of the diagonal rod are respectively and rotatably provided with a rotating wheel, one surface of the two vertical rods opposite to each other is provided with a sliding groove, the rotating wheel is arranged in the sliding groove in a sliding way, and a plurality of clapboards are arranged at intervals in the sliding groove, and a hinge rod is arranged between every two adjacent clapboards. This application has and makes the protection network have buffer function, can make the protection network not receive the effect of destruction.

Description

Passive protective net with buffer function
Technical Field
The application relates to the field of passive protective nets, in particular to a passive protective net with a buffering function.
Background
In order to ensure the safety of the broken rock mountain slope, a passive protective net is usually arranged below the mountain slope to protect the rock slope from falling off due to weathering, rain or vibration.
At present, the existing passive protection mode mainly adopts a metal net and a steel rope anchor rod to protect the slope, when broken stones or shallow collapse speed caused by vibration is higher, larger impact force can be generated on a passive protective net, the protective net of a passive protection system is easily broken, and the safety of buildings below the side slope is endangered.
SUMMERY OF THE UTILITY MODEL
In order to improve the technical problem that the easy rubble that is destroyed of protection network landing, this application provides a passive protection network with buffer function.
The application provides a passive protection network with buffer function adopts following technical scheme:
a passive protective net with a buffering function comprises a plurality of steel columns fixed on the ground, an upper supporting rope and a lower supporting rope are connected between every two adjacent steel columns, the upper supporting rope is fixedly connected to the top ends of the steel columns, the lower supporting rope is fixedly connected to the bottom ends of the steel columns, a protective net is fixedly installed between the upper supporting rope and the lower supporting rope, the protective net comprises a left side net and a right side net, a buffering component is fixedly connected between the left side net and the right side net, the buffering component comprises two vertical rods, one vertical rod is fixedly arranged on one side, close to the right side net, of the left side net, the other vertical rod is fixedly arranged on one side, close to the left side net, of the right side net, a plurality of hinged rods are installed on the two vertical rods, each hinged rod comprises two inclined rods, the two inclined rods are arranged in a crossed mode, the two inclined rods are hinged, rotating wheels are respectively arranged at the two ends of the inclined rods, the runner is arranged in the sliding groove in a sliding mode, a plurality of partition plates are arranged in the sliding groove at intervals, and a hinge rod is arranged between every two adjacent partition plates.
Through adopting above-mentioned technical scheme, through set up the buffering subassembly on the protective screen, divide into left side net and right side net with the protection network, when rubble landing massif slope, when falling on the protective screen, the rubble produced the impact force to the protection network, makes the buffering subassembly pulled open, and left side net and right side net keep away from each other and remove, play the cushioning effect, make the protection network can support the impact force that blocks rubble landing massif slope, make the protection network not receive destruction.
Optionally, two many springs of fixedly connected with between the montant, many the spring interval evenly sets up.
Through adopting above-mentioned technical scheme, the spring can be taut with two montants, makes two montants press close to as far as, makes the distance that the buffering subassembly was pulled open bigger, plays better buffering effect to with the rubble clearance back on landing to the protection network, because the effect of spring elasticity can make two montants be close to each other and remove, resume the normality.
Optionally, a protection net is further fixedly connected between two adjacent steel columns, and the protection net is installed on one side, far away from the mountain, of the protection net.
Through adopting above-mentioned technical scheme, the protection network can bear the produced impact force of rubble landing with the protection network jointly, can play the guard action to the protection network to open distance to the buffering subassembly has limiting displacement, further protection the protection network not receive destruction.
Optionally, a concrete foundation is arranged on one side, away from each other, of each of the two steel columns located on the outermost side, an anchor rod is embedded in the concrete foundation, and a side pulling anchor rope is fixedly connected between the anchor rod and the top ends of the steel columns.
Through adopting above-mentioned technical scheme, the anchor rope is drawn to side will be located two steel column tops and ground fixed connection in the outside, can strengthen the stability of two steel columns in the outside to the stability of passive protection network has been improved.
Optionally, an upward anchor rod is anchored on the mountain slope, and the upward anchor rod and the top end of the steel column are connected with an upward anchor rope.
Through adopting above-mentioned technical scheme, go up the anchor rope with steel column top fixed connection on the massif slope, make the steel column more firm to make passive protection network more firm, make passive protection network can bear bigger impact force.
Optionally, the steel column is fixedly mounted on the base, the base comprises a concrete base buried in the ground, four foundation bolts are pre-buried in the concrete base, a steel support is mounted on the concrete base and comprises a bottom plate, two opposite ear plates are fixedly arranged on the bottom plate, a jacking block is further fixedly arranged between the ear plates and is a cylinder, and the periphery of the jacking block is fixed between the two ear plates.
Through adopting above-mentioned technical scheme, install the steel column on the base, the mounting means is simple to the bearing steel column can be stabilized to the base, in addition, the steel column butt is close to the one end on massif slope at the tight piece in top, makes the steel column and the ground that is located the protection network and keeps away from massif slope one side form the acute angle, the rubble of bearing landing that makes the protection network can be better.
Optionally, the upper supporting rope and the lower supporting rope are respectively provided with a pressure reducing ring.
By adopting the technical scheme, when the tensile force applied to the upper supporting rope and the lower supporting rope reaches the set value, the pressure reducing ring absorbs energy through deformation displacement, so that other components are prevented from being damaged, and the passive protective net has the function of overload protection.
Optionally, a pressure reducing ring is mounted on the pull-up mooring line.
By adopting the technical scheme, when the tensile force applied to the pull-up anchor rope reaches a set value, the pressure reducing ring absorbs energy through deformation displacement, so that other components are prevented from being damaged, and the passive protective net has the overload protection effect.
In summary, the present application includes at least one of the following beneficial technical effects:
1. the protection net is divided into the left side net and the right side net by arranging the buffer component on the protection net, when broken stones fall off the mountain slope and fall on the protection net, the broken stones generate impact force on the protection net, so that the buffer component is pulled open, the left side net and the right side net move away from each other, a buffer effect is achieved, the protection net can resist the impact force of the broken stones falling off the mountain slope, and the protection net is not damaged;
2. the spring can tighten the two vertical rods, so that the two vertical rods are close to each other as much as possible, the distance for pulling the buffering assembly is longer, a better buffering effect is achieved, and after the broken stones sliding onto the protective net are cleaned, the two vertical rods can move close to each other under the action of the spring force to recover to a normal state;
3. the protection net can bear the produced impact force of rubble landing with the protection network jointly, can play the guard network guard action to the open distance of buffering subassembly has limiting displacement, further protection the protection network not receive destruction.
Drawings
Fig. 1 is a schematic perspective view of the present application.
Fig. 2 is a schematic structural diagram of a protection net and a buffer assembly.
Fig. 3 is a schematic perspective view of a concrete foundation.
Fig. 4 is a perspective view of the hinge rod.
Description of reference numerals: 1. a steel column; 2. an upper support rope; 3. a lower support line; 4. a protective net; 41. a left side net; 42. a right side net; 5. a buffer assembly; 51. a vertical rod; 511. a chute; 512. a partition plate; 52. a hinged lever; 521. a diagonal bar; 5211. a rotating wheel; 53. a spring; 6. a concrete base; 61. anchor bolts; 62. a base plate; 63. an ear plate; 64. a jacking block; 65. a rectangular plate; 7. a pressure reducing ring; 8. a concrete foundation; 9. laterally pulling the anchor rope; 10. pulling up the anchor rod; 11. pulling up the anchor rope; 12. and (4) a protection net.
Detailed Description
The present application is described in further detail below with reference to figures 1-4.
The embodiment of the application discloses a passive protective net with a buffering function. Referring to fig. 1 and 2, a passive protection network with buffer function includes many steel columns 1, go up supporting rope 2, lower supporting rope 3, protection network 4 and buffer assembly 5, go up supporting rope 2 fixed connection on two adjacent steel columns 1 tops, lower supporting rope 3 fixed connection is in two adjacent steel columns 1 bottoms, protection network 4 hangs and establishes between last supporting rope 2 and lower supporting rope 3, protection network 4 includes left side net 41 and right side net 42, fixedly connected with buffer assembly 5 between left side net 41 and the right side net 42, when the rubble landing on the massif slope, protection network 4 can block the rubble, prevent that the rubble landing from to the road surface, buffer assembly 5 can play the cushioning effect to protection network 4, prevent that protection network 4 from damaging.
Referring to fig. 1 and 3, a plurality of steel columns 1 are installed at the bottom of a mountain slope, the plurality of steel columns 1 are uniformly arranged at intervals and are arranged in parallel, a concrete base 6 is poured in the ground at the bottom of the mountain slope, the concrete base 6 is of a cuboid structure, the top surface of the concrete base 6 is flush with the ground, and four foundation bolts 61 are embedded in the concrete base 6; installing a steel support on the top surface of the concrete base 6, wherein the steel support comprises a bottom plate 62, the bottom plate 62 is bolted to the top surface of the concrete base 6 through foundation bolts 61, two oppositely arranged ear plates 63 are fixedly arranged on the top surface of the bottom plate 62, through holes are respectively formed in the two ear plates 63, an installation plate is fixedly arranged at the bottom end of the steel column 1, bolt holes corresponding to the through holes are formed in the installation plate, the installation plate is located between the two ear plates 63 and penetrates through the bolts, and the steel column 1 is installed on the steel support; the end, far away from the massif slope, of each of the two lug plates 63 is fixedly provided with a jacking block 64, each jacking block 64 is a cylinder, the peripheral surface of each jacking block is fixed between the two lug plates 63, one surface, far away from the massif slope, of each jacking block 64 is fixedly provided with a rectangular plate 65, and the steel column 1 abuts against one end, close to the massif slope, of each jacking block 64, so that an acute angle is formed between the steel column 1 and the ground, located on one side, far away from the massif slope, of the protection net 4.
Go up supporting rope 2 and lower supporting rope 3 and be galvanized steel wire rope and make, go up supporting rope 2 fixed connection on the top of two adjacent steel columns 1, 3 fixed connection of lower supporting rope are in the bottom of two adjacent steel columns 1, go up supporting rope 2 and lower supporting rope 3 and are used for installing protection network 4.
Referring to fig. 2 and 4, a protective net 4 is hung between an upper supporting rope 2 and a lower supporting rope 3, the protective net 4 comprises a left side net 41 and a right side net 42, a buffer assembly 5 is fixedly arranged between the left side net 41 and the right side net 42, the buffer assembly 5 comprises two vertical rods 51, one vertical rod 51 is fixedly arranged on one side of the left side net 41 close to the right side net 42, the other vertical rod 51 is fixed on one side of the right side net 42 close to the left side net 41, sliding grooves 511 are respectively arranged on opposite sides of the two vertical rods 51, the sliding grooves 511 are arranged along the length direction of the vertical rods 51, a plurality of hinged rods 52 are connected between the two vertical rods 51, each hinged rod 52 comprises two inclined rods 521 which are arranged in a crossed manner, two ends of the two inclined rods 521 are respectively and rotatably connected with rotating wheels 5211, the rotating wheels 5211 are slidably arranged in the sliding grooves 511, partition plates 512 are fixedly arranged in the sliding grooves 511, the partition plates 512 are square plates, the partition plates 512 divide the sliding grooves 511 into a plurality of spaces, a hinge rod 52 is disposed between two adjacent partitions 512.
Still many springs 53 of fixedly connected with between two montants 51, many springs 53 interval are evenly set up, and spring 53 can be taut with two montants 51, makes two montants 51 be close to each other.
When broken stones on the mountain slope slide down, the protective net 4 can block the broken stones to prevent the broken stones from continuously sliding down, and when the broken stones slide down onto the protective net 4, impact force is generated on the protective net 4, the rotating wheel 5211 rotates in the sliding groove 511, the included angle between the two inclined rods 521 in the horizontal direction is reduced, and the left side net 41 and the right side net 42 move away from each other, so that the protective net 4 has a buffering function, the protective net 4 is prevented from being damaged by the impact force of the broken stones sliding down, and the plurality of hinged rods 52 can also form a grid shape to prevent the broken stones from sliding down between the two vertical rods 51; after the broken stones are cleaned, the two vertical rods 51 can move close to each other due to the tensile force of the springs 53, and the normal state is recovered.
Referring to fig. 1, a protection net 12 is fixedly hung between an upper support rope 2 and a lower support rope 3, the protection net 12 is arranged on one side, away from a mountain slope, of a protection net 4, the area of the protection net 12 is larger than that of the protection net 4, the grid size of the protection net 12 is larger than that of the protection net 4, when broken stones slide down onto the protection net 4, a left side net 41 and a right side net 42 are far away from each other, the protection net 12 can block the left side net 41 and the right side net 42, the protection net 4 can support the broken stones with large bearing weight, and the protection net 4 is prevented from being damaged due to the fact that the weight of the broken stones slides down is large.
Referring to fig. 1, one side of keeping away from each other at two steel columns 1 that lie in the outside is provided with concrete foundation 8 respectively, 8 top surfaces of concrete foundation and ground parallel and level, the stock has been buried underground in concrete foundation 8, the stock is made by the reinforcing bar, the stock is by one side slant tilt up setting to one side of keeping away from steel column 1 that is close to steel column 1, and the one end that the stock lies in 8 top surfaces of concrete foundation stretches out concrete foundation 8, the anchor rope 9 is drawn with 1 top fixedly connected with side of steel column to the one end that stretches out concrete foundation 8 at the stock, the anchor rope 9 is drawn by the side and is made by wire rope, the side is drawn the stability that anchor rope 9 can strengthen passive protection network 4, make passive protection network 4 more firm.
Referring to fig. 1, be provided with anchor rod 10 on the massif slope, anchor rod 10 anchors in the massif slope, and the slip casting will anchor rod 10 fixed, anchor rope 11 is drawn on fixedly connected with between anchor rod 10 and the 1 top of steel column, anchor rope 11 will be connected on the massif slope passively to protection network 4, when the rubble landing is on protection network 4, under the impact force effect of rubble, anchor rope 11 can provide the pulling force for passive protection network 4, prevent that passive protection network 4 from empting.
Referring to fig. 1 and 2, pressure reducing rings 7 are respectively hung on an upper supporting rope 2 and a lower supporting rope 3 in a penetrating manner, two ends of the upper supporting rope 2, which are close to a steel column 1, are respectively hung with one pressure reducing ring 7, two ends of the lower supporting rope 3, which are close to the steel column 1, are respectively hung with two pressure reducing rings 7, the pressure reducing rings 7 are annular members made of bent steel pipes, the pressure reducing rings 7 are also hung on an upper pulling anchor rope 11 in a penetrating manner, and when the tensile force received by the upper supporting rope 2, the lower supporting rope 3 and the upper pulling anchor rope 11 reaches a set value, the pressure reducing rings 7 absorb energy through deformation displacement, so that other members are prevented from being damaged, and the passive protective net 4 has an overload protection effect.
The implementation principle of a passive protective net with a buffering function in the embodiment of the application is as follows: when broken stones on the slope of the mountain slide off, the broken stones are blocked by the passive protective screen 4, so that the broken stones are prevented from sliding off to the ground, the ground is prevented from being damaged, and passersby are prevented from being injured by crashing; when the crushed stones fall onto the protective screening 4, the protective screening 4 receives impact force, the buffer assembly 5 is pulled away, the left side net 41 and the right side net 42 move away from each other, the impact force of the crushed stones can be buffered, the protective screening 4 is protected from being damaged, and after the buffer assembly 5 is pulled away, the plurality of hinged rods 52 form a grid shape, so that the crushed stones can be prevented from passing through, and the crushed stones are prevented from falling onto the mountain slope; in addition, the protection net 12 is arranged on the side, away from the mountain slope, of the protection net 4, so that the protection net 4 can be protected, the distance for opening the buffer assembly 5 is limited, and the protection net 4 is further protected from being damaged.
The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims (8)

1. The utility model provides a passive protection network with buffer function which characterized in that: the steel column comprises a plurality of steel columns (1) fixed on the ground, wherein an upper supporting rope (2) and a lower supporting rope (3) are connected between every two adjacent steel columns (1), the upper supporting rope (2) is fixedly connected to the top ends of the steel columns (1), the lower supporting rope (3) is fixedly connected to the bottom ends of the steel columns (1), a protective net (4) is fixedly mounted between the upper supporting rope (2) and the lower supporting rope (3), the protective net (4) comprises a left side net (41) and a right side net (42), a buffer component (5) is fixedly connected between the left side net (41) and the right side net (42), the buffer component (5) comprises two vertical rods (51), one vertical rod (51) is fixedly arranged on one side, close to the right side net (42), of the left side net (41) and the other vertical rod (51) is fixedly arranged on one side, close to the left side net (41), of the right side net (42), two a plurality of hinge bar (52) are installed to montant (51), and hinge bar (52) include two down tube (521), and two down tube (521) cross arrangement, and two down tube (521) are articulated, down tube (521) both ends are rotated respectively and are provided with runner (5211), have seted up spout (511) on two montant (51) relative faces, runner (5211) slide and set up in spout (511), just the interval is provided with a plurality of baffles (512) in spout (511), sets up a hinge bar (52) between two adjacent baffles (512).
2. A passive protective net with a buffer function according to claim 1, characterized in that: two many springs (53) of fixedly connected with between montant (51), many spring (53) interval evenly sets up.
3. A passive protective net with a buffer function according to claim 1, characterized in that: and a protection net (12) is fixedly connected between every two adjacent steel columns (1), and the protection net (12) is installed on one side, far away from the mountain, of the protection net (4).
4. A passive protective net with a buffer function according to claim 1, characterized in that: concrete foundations (8) are arranged on one sides, far away from each other, of the two steel columns (1) located on the outermost sides, anchor rods are embedded in the concrete foundations (8), and side pulling anchor ropes (9) are fixedly connected between the anchor rods and the top ends of the steel columns (1).
5. A passive protective net with a buffer function according to claim 1, characterized in that: an upward-pulling anchor rod (10) is anchored on the mountain slope, and an upward-pulling anchor rope (11) is connected between the upward-pulling anchor rod (10) and the top end of the steel column (1).
6. A passive protective net with a buffer function according to claim 1, characterized in that: steel column (1) fixed mounting is on the base, the base is including concrete foundation (6) of burying in the ground, pre-buried in concrete foundation (6) have four rag bolts (61), install the steel support on concrete foundation (6), the steel support includes bottom plate (62), two relative otic placodes (63) have set firmly on bottom plate (62), two still set firmly between otic placode (63) and tightly piece (64), tightly piece (64) are the cylinder, and its global is fixed between two otic placodes (63).
7. A passive protective net with a buffer function according to claim 1, characterized in that: pressure reducing rings (7) are respectively installed at four corners of the protective net (4).
8. A passive protective net with a buffer function according to claim 5, characterized in that: and a pressure reducing ring (7) is arranged on the pull-up anchor rope (11).
CN202120378973.4U 2021-02-19 2021-02-19 Passive protective net with buffer function Expired - Fee Related CN216238193U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202120378973.4U CN216238193U (en) 2021-02-19 2021-02-19 Passive protective net with buffer function

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202120378973.4U CN216238193U (en) 2021-02-19 2021-02-19 Passive protective net with buffer function

Publications (1)

Publication Number Publication Date
CN216238193U true CN216238193U (en) 2022-04-08

Family

ID=80939612

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202120378973.4U Expired - Fee Related CN216238193U (en) 2021-02-19 2021-02-19 Passive protective net with buffer function

Country Status (1)

Country Link
CN (1) CN216238193U (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115506277A (en) * 2022-10-20 2022-12-23 张亦凡 Geotechnical engineering construction is with supporting protector
CN118223509A (en) * 2024-04-30 2024-06-21 湖南省水利水电科学研究院 A soil and water conservation device based on wind farm

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115506277A (en) * 2022-10-20 2022-12-23 张亦凡 Geotechnical engineering construction is with supporting protector
CN118223509A (en) * 2024-04-30 2024-06-21 湖南省水利水电科学研究院 A soil and water conservation device based on wind farm

Similar Documents

Publication Publication Date Title
CN211079944U (en) Ecological protective structure of side slope of broken massif
CN216238193U (en) Passive protective net with buffer function
CN111236276A (en) Protective structure for dangerous rock falling of high and steep side slope of tunnel and construction method
CN207376492U (en) A kind of highway hangar tunnel safeguard structure suitable under precipitous cliff
CN113756217A (en) Collapse falling stone protection net structure with toughness energy dissipation function and installation method
CN210482099U (en) Light rockfall interception structure for high and steep slope
CN209605686U (en) Close on both wired deep desulphurization blast working safety protection components
CN210482097U (en) High cantilever rockfall protective structure
CN214939446U (en) Road side slope multi-stage protection system
CN112832260B (en) Cutting slope reinforced passive protection system and construction method thereof
CN111794138A (en) Two-wing sand blocking wall
CN221972361U (en) Slope protection device
CN212742585U (en) Roadbed slope protection structure
JP3593609B2 (en) Shock absorbing fence
CN221919058U (en) Steel reinforced gabion stone wall structure in the middle of the slope
CN221956753U (en) A passive flexible protection net for slope protection
KR102609247B1 (en) Flood Wall Apparatus Using Double Airbag and Construction Mehtod of The Same
JP3002130B2 (en) Suspended protection and sabo dam with suspended protection
CN215593754U (en) Dangerous rock active protection structure
JP3448788B2 (en) Shock absorbing rock fluence
CN211898456U (en) A kind of protection structure for dangerous rock and rockfall on high and steep slope of tunnel
CN219240336U (en) Passive flexible protection system for falling rocks
KR100629909B1 (en) Rockfall prevention device having two-stage auxiliary facility structure for road
CN223329861U (en) Tunnel exit dangerous rock and accumulation body protection system
US20050205853A1 (en) Revolutionary barrier for rockfall or the like: maintenance-free, highly efficient in dissipating kinetic energy, and fast in installation

Legal Events

Date Code Title Description
GR01 Patent grant
GR01 Patent grant
CF01 Termination of patent right due to non-payment of annual fee
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20220408