CN206510235U - A kind of excavation machine tension adjustment mechanism - Google Patents
A kind of excavation machine tension adjustment mechanism Download PDFInfo
- Publication number
- CN206510235U CN206510235U CN201720154874.1U CN201720154874U CN206510235U CN 206510235 U CN206510235 U CN 206510235U CN 201720154874 U CN201720154874 U CN 201720154874U CN 206510235 U CN206510235 U CN 206510235U
- Authority
- CN
- China
- Prior art keywords
- sliding shoe
- support
- adjustment mechanism
- diamond wire
- tension adjustment
- 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
Links
Landscapes
- Earth Drilling (AREA)
Abstract
The utility model discloses a kind of excavation machine tension adjustment mechanism, solve the problem of diamond wire in existing tension adjustment mechanism is easy to fracture, its drip irrigation device is a kind of excavation machine tension adjustment mechanism, including support, it is rotatably connected on the wire storage tube on support, diamond wire of the winding of single layer on wire storage tube, it is rotatably connected on the directive wheel being oriented on support to diamond wire, the tensioning wheel for being used to adjust Buddha's warrior attendant line tension slid up and down is provided with the support, the sliding shoe slid up and down is provided with the support, the drive mechanism slid above and below driving sliding shoe is provided with the support, the tensioning wheel is rotatably connected on sliding shoe, the gas spring for alleviating Buddha's warrior attendant line tension is also fixedly connected with the sliding shoe, the other end of the gas spring is fixedly connected on support.The tension force of diamond wire is reduced by the addition of gas spring, the possibility of diamond wire overtension is reduced so that diamond wire is not easy to break.
Description
Technical field
The utility model is related to a kind of excavation machine, more specifically, it relates to a kind of excavation machine tension adjustment mechanism.
Background technology
Line cutting technology is more advanced silicon chip process technology in the world at present, and its principle is transported at a high speed by one
Dynamic steel wire drives the cutting blade material being attached on steel wire to rub the hard brittle materials such as semiconductor, so as to reach cutting mesh
's.Line cutting technology has compared with traditional knife saw piece, grinding wheel and inner circle are cut with efficiency high, and production capacity is high, precision height etc.
Advantage.
In the cutting process to workpiece, steel wire forms a bracing cable by the guiding of more than ten of guide roller on main line roller
Net, and workpiece to be processed realizes the feeding of workpiece by the rise and fall of workbench, and in compression pump in the presence of, be assemblied in
Grinding agent is sprayed to the cutting position of steel wire and workpiece by the grinding agent automatic spraying device in equipment, and grinding agent is driven by steel wire
Move back and forth, cutting is produced to workpiece using abrasive sand, the hard brittle materials such as semiconductor are once cut into hundreds of simultaneously,
In above-mentioned operation, the effect of steel wire holds the balance, even if but best steel wire, its ductility and abrasion resistance are also limited
, that is to say, that steel wire can be tapered in driving grinding agent to move back and forth, until being finally pulled off.
At present, Publication No. CN201625917U Chinese patent discloses a kind of tension adjustment machine of diamond wire extracting machine
Structure, applied to being oriented to wire storage tube, winding of single layer diamond wire on the wire storage tube and to the diamond wire
On the diamond wire extracting machine of first directive wheel and the second directive wheel, it is characterised in that the tension adjustment mechanism at least includes：
Bearing up pulley, is arranged between first directive wheel and the second directive wheel, for drawing first directive wheel and the second directive wheel
Between diamond wire；Tension sensor, is arranged on the tensioning wheel, constantly senses the tension force of diamond wire on the tensioning wheel
Value, and send drive signal when the tension value is less than preset value；Servomotor, is electrically connected with the tension sensor, is used for
Receive and started working after the drive signal that the tension sensor is sent；And screw mandrel, one end connects the tensioning wheel, another
The end connection servomotor, and the tensioning wheel progress monodisplacement is drawn when servomotor works, to adjust the gold
The tension force of firm line.
When the tension value that tension sensor is sensed is less than preset value, tension sensor will send drive signal, servo
Motor is acted on, and is driven tensioning wheel to carry out monodisplacement, is realized the change of Buddha's warrior attendant line tension；Sensed when tension sensor
Force value is more than or equal to preset value, and tension sensor will not send drive signal, and tensioning wheel maintains current location status；But
When equipment cuts crystal silicon, diamond wire is constantly tensed, during the overtension of diamond wire, the possibility being easily broken so that set
It is standby to be difficult to continue to run with.
Utility model content
In view of the deficienciess of the prior art, the utility model is to provide a kind of excavation machine tension adjustment mechanism, pass through
The addition of gas spring reduces the tension force of diamond wire, reduces the possibility of diamond wire overtension so that diamond wire is not easy to break.
To achieve the above object, the utility model provides following technical scheme：A kind of excavation machine tension adjustment mechanism, bag
Include diamond wire on wire storage tube of support, the wire storage tube being rotatably connected on support, winding of single layer, be rotatably connected on it is right on support
The tensioning wheel for being used to adjust Buddha's warrior attendant line tension slid up and down is provided with the directive wheel that diamond wire is oriented to, the support, it is described
The drive mechanism for being provided with and being slid above and below driving sliding shoe on the sliding shoe slid up and down, the support, institute are provided with support
State tensioning wheel to be rotatably connected on sliding shoe, the gas bullet for alleviating Buddha's warrior attendant line tension is also fixedly connected with the sliding shoe
Spring, the other end of the gas spring is fixedly connected on support.
By using above-mentioned technical proposal, drive mechanism can be driven and be slid above and below sliding shoe, and tensioning wheel is rotatably connected on
On sliding shoe, tensioning wheel can follow sliding shoe to slide up and down, and drive mechanism drives sliding shoe to slide upwards, and tensioning wheel follows cunning
Motion block upward sliding, diamond wire is constantly tensed, and the tension force of diamond wire constantly increases, and the pressure suffered by gas spring constantly increases, when
Gas-spring pressure is more than after limit value, and gas spring-compressed, sliding shoe is moved down, and the degrees of tensions of diamond wire reduces, sliding shoe
Negative-feedback regu- lation is carried out to diamond wire, the possibility of diamond wire overtension is reduced so that diamond wire is not easy to break.
The utility model is further arranged to：The drive mechanism includes the leading screw being located in vertically on sliding shoe, described
Threads of lead screw is connected on sliding shoe, and servomotor is fixedly connected with the support, and described leading screw one end is connected to servo electricity
On machine.
By using above-mentioned technical proposal, driving servomotor starts the rotation that leading screw can be achieved, and leading screw is rotated can
Drive and slid above and below sliding shoe, coarse adjustment is carried out to tensioning wheel, the degrees of tensions of diamond wire is conveniently adjusted.
The utility model is further arranged to：For measuring Buddha's warrior attendant line tension is also fixedly connected with the tensioning wheel
Force snesor.
By using above-mentioned technical proposal, tension sensor can detect the degrees of tensions of diamond wire, servo electricity in real time
The value that machine can be exported according to tension sensor automatically adjusts the start and stop of servomotor, realizes the automatic start-stop of servomotor,
Enable a device to automatically adjust the start and stop of servomotor according to the tightening force of diamond wire.
The utility model is further arranged to：Length direction of the sliding shoe along leading screw unidirectionally slides.
By using above-mentioned technical proposal, when the tension value of tension sensor is less than preset value, servomotor starts band
Dynamic sliding shoe is slid upwards so that diamond wire can be tensed, and when the tension value of tension sensor is more than preset value, sliding shoe is difficult
With reverse shuffle, sliding shoe can be fixed on leading screw, reduce the possibility that sliding shoe vibrates on leading screw.
The utility model is further arranged to：The slide rail for being parallel to leading screw, the cunning are also fixedly connected with the support
Rail is located on sliding shoe.
By using above-mentioned technical proposal, sliding shoe possibility along leading screw axis rotation on leading screw is reduced so that sliding
Motion block can slide along the length direction stabilization of leading screw.
The utility model is further arranged to：Sliding groove is offered on the sliding shoe, the tensioning wheel two ends, which are fixed, to be connected
The fixing axle being embedded in sliding groove is connected to, one end of the remote support of the gas spring is connected in fixing axle.
By using above-mentioned technical proposal, the rotary shaft being fixedly connected on tensioning wheel can be embedded in sliding groove, sliding
Dynamic groove is spacing to fixing axle progress, reduces the possibility that tensioning wheel departs from sliding groove.
The utility model is further arranged to：The limited block slid up and down, the limited block are provided with the sliding groove
Bearing is inside fixedly connected with, the fixing axle is rotatably connected in bearing, and the gas spring is connected to the outside of limited block.
By using above-mentioned technical proposal, fixing axle is rotatably connected in bearing, bearing can be spacing to fixing axle, subtracts
The possibility of small tensioning wheel bounce so that the tension stability of diamond wire, diamond wire is because of tension variation when reducing cutting crystal silicon
So that the possibility of cutting track change.
The utility model is further arranged to：Offer what is extended along sliding groove length direction on the inwall of the sliding groove
Neck, the both sides of the sliding shoe are fixedly connected with the fixture block being connected in neck.
By using above-mentioned technical proposal, fixture block can be connected in neck, added between sliding shoe and sliding groove
Constraint, reduces the possibility that sliding shoe is offset along tensioning wheel axle center so that sliding shoe is merely able to slide up and down, adds sliding shoe
Stability during sliding.
The utility model is further arranged to：The distance of stretch out and draw back of the gas spring is more than the length of sliding groove.
By using above-mentioned technical proposal, the gas spring being fixed on sliding shoe can be connected on diamond wire, to Buddha's warrior attendant
The larger tension force of line, when the tension force of diamond wire is less than the thrust of gas spring, drive mechanism can drive and be glided on sliding shoe
Dynamic, when the tension force of diamond wire is more than the thrust of gas spring, gas spring contraction automatically adjusts the tension force of diamond wire.
The utility model is further arranged to：The gas spring thread is connected on sliding shoe.
By using above-mentioned technical proposal, gas spring is rotated, the shrinkage degree of gas spring constantly changes, the compression of gas spring
Power is also constantly changing, and the thrust of gas spring is can adjust by rotating gas spring, diamond wire when being easy to the adjustment equipment to cut
Maximum degrees of tensions.
In summary, the utility model has the advantages that：The addition of gas spring reduces diamond wire and is lifted up
When because overtension be broken possibility；The sliding shoe unidirectionally slid reduces the possibility of tensioning wheel vibration；Gas spring, which is fixed, to be connected
It is connected on limited block, reduces the possibility of tensioning wheel skew；Diamond wire when the gas spring of threaded connection is easy to the adjustment equipment to cut
Maximum degrees of tensions.
Brief description of the drawings
Fig. 1 is the stereogram of the present embodiment；
Fig. 2 is the internal explosion figure of sliding shoe in the present embodiment.
Reference：1st, support；2nd, wire storage tube；3rd, directive wheel；4th, L-shaped supporting plate；5th, vertical left regulation wheel；6th, Level tune
Wheel；7th, diamond wire；8th, tensioning wheel；9th, servomotor；10th, leading screw；11st, sliding shoe；12nd, the first scotch；13rd, slide rail；14th,
Two scotch；15th, sliding groove；16th, neck；17th, fixture block；18th, screwed hole；19th, gas spring；20th, fixing axle；21st, bearing；22、
Tension sensor；23rd, limited block.
Embodiment
The utility model is described further referring to figs. 1 to Fig. 2.
As shown in figure 1, a kind of excavation machine tension adjustment mechanism, including support 1, the left end of support 1 is rotatably connected to storage silk
Cylinder 2, the axis perpendicular of wire storage tube 2 is in the support 1 on right side, and the rotated down of wire storage tube 2 is connected with directive wheel 3, the axle center of directive wheel 3
Perpendicular to the support 1 of rear side, the lower left of directive wheel 3 is additionally provided with a directive wheel being rotatably connected on support 13, right side
The top of directive wheel 3 is provided with the L-shaped supporting plate 4 being fixedly connected with support 1, and the right side of L-shaped supporting plate 4 is rotatably connected to perpendicular
Straight left regulation wheel 5, the axis parallel of vertical left regulation wheel 5 is in the axle center of wire storage tube 2, and the top of L-shaped supporting plate 4 is also rotatably connected to water
Flat left regulation wheel 6, the axis parallel of Level tune wheel 6 is in the vertical Buddha's warrior attendant having for cutting silico briquette on the support 1 of rear side, support 1
Line 7, diamond wire 7 is wound since wire storage tube 2, and side advances and is looped around on the directive wheel 3 of lower right straight down, before continuing up
Enter to be looped around on the tensioning wheel 8 between two directive wheels 3, continue to extend downwardly afterwards and be looped around on the directive wheel 3 of lower left,
Diamond wire 7 extends straight up afterwards, is looped around in vertical left regulation wheel 5, when reaching the top of vertical left regulation wheel 5, the water of diamond wire 7
It is flat to extend around to the left on the Level tune wheel 6 in left side.
As depicted in figs. 1 and 2, the top of support 1 is fixedly connected with servomotor 9, and the rotary shaft of servomotor 9 is vertically arranged
Leading screw 10 is fixedly and coaxially connected on the lower section of servomotor 9, rotary shaft, the lower end of leading screw 10 is provided with sliding shoe 11, silk
The bottom of thick stick 10 is also fixedly connected with first scotch 12 spacing to sliding shoe 11, and leading screw 10 is threaded in sliding shoe 11
Left end, the rear side of sliding shoe 11 is connected on the rear wall of support 1, and the right-hand member of sliding shoe 11 is equipped with parallel to the axle center of leading screw 10
Slide rail 13, the upper end of slide rail 13 is fixedly connected on the upper end of support 1, and the lower end of slide rail 13, which is fixedly connected with, to be limited sliding shoe 11
Second scotch 14 of position.
The middle part of sliding shoe 11 offers the sliding groove 15 that the edge of rectangle extends perpendicular to the rear wall direction of support 1, sliding groove
The limited block 23 slid up and down is provided with 15, the left and right ends of sliding groove 15 offer neck 16, the left and right two of sliding shoe 11
End is fixedly connected with the fixture block 17 being connected in neck 16, and the inwall of the lower section of sliding groove 15 is offered through the downside of sliding shoe 11
Screwed hole 18, the internal thread of screwed hole 18 is connected with gas spring 19, and the piston rod of gas spring 19 is set straight up, gas spring 19
Distance of stretch out and draw back be more than the vertical direction of sliding groove 15 on length.The front side of limited block 23 is fixedly connected with fixing axle 20, fixed
The fixed tension sensor 22 for being rotatably connected to ring-type, tension sensor on bearing 21, the outer wall of bearing 21 are socketed with axle 20
22 outside, which is also fixedly connected with idler roller, the outer wall of idler roller, offers caulking groove, and diamond wire 7 can be connected in caulking groove.
Operation principle：Equipment starts, and diamond wire 7 is constantly transmitted to left side from right-hand member, when subordinate equipment cuts silico briquette, gold
Firm line 7 is tensed, and tension sensor 22 senses the pulling force of diamond wire 7, when the tension value that tension sensor 22 is sensed is less than in advance
If value is set, motor is rotated forward, sliding on sliding shoe 11 to tense diamond wire 7 until tension value is equal to preset value；When the institute of tension sensor 22
The tension value sensed is set more than preset value, and motor does not start, and the tension force of diamond wire 7 constantly increases, when 23 pairs of gas bullets of limited block
When the pressure of spring 19 is more than the startup pressure of gas spring 19, gas spring 19 is followed limited block 23 to decline by drops, diamond wire 7,
The tension force of diamond wire 7 reduces until the pressure of 23 pairs of gas springs 19 of limited block is equal to active force of the gas spring 19 to limited block 23.
Gas spring 19 is rotated, the power that gas spring 19 is connected on limited block 23 constantly changes so that gold when diamond wire 7 is tensed
The maximum pull of firm line 7 constantly changes.
Described above is only preferred embodiment of the present utility model, and protection domain of the present utility model is not limited merely to
Above-described embodiment, all technical schemes belonged under the utility model thinking belong to protection domain of the present utility model.It should refer to
Go out, for those skilled in the art, some improvement under the premise of the utility model principle is not departed from and
Retouching, these improvements and modifications also should be regarded as protection domain of the present utility model.
Claims (10)
1. a kind of excavation machine tension adjustment mechanism, including support (1), the wire storage tube (2), the individual layer that are rotatably connected on support (1)
The diamond wire (7) that is wrapped on wire storage tube (2), it is rotatably connected on the directive wheel (3) being oriented on support (1) to diamond wire (7), institute
State the tensioning wheel (8) for being used to adjust diamond wire (7) tension force for being provided with and sliding up and down on support (1), it is characterised in that：The branch
It is provided with frame (1) and is provided with what driving sliding shoe (11) slid up and down on the sliding shoe (11) slid up and down, the support (1)
Drive mechanism, the tensioning wheel (8) is rotatably connected on sliding shoe (11), and being also fixedly connected with the sliding shoe (11) is used for
Alleviate the gas spring (19) of diamond wire (7) tension force, the other end of the gas spring (19) is fixedly connected on support (1).
2. a kind of excavation machine tension adjustment mechanism according to claim 1, it is characterised in that：The drive mechanism includes perpendicular
Direct puncture is located at the leading screw (10) on sliding shoe (11), and the leading screw (10) is threaded on sliding shoe (11), the support (1)
On be fixedly connected with servomotor (9), described leading screw (10) one end is connected on servomotor (9).
3. a kind of excavation machine tension adjustment mechanism according to claim 2, it is characterised in that：On the tensioning wheel (8) also
It is fixedly connected with the tension sensor (22) for measuring diamond wire (7) tension force.
4. a kind of excavation machine tension adjustment mechanism according to claim 3, it is characterised in that：The sliding shoe (11) is along silk
The length direction of thick stick (10) unidirectionally slides.
5. a kind of excavation machine tension adjustment mechanism according to claim 4, it is characterised in that：It is also solid on the support (1)
Surely the slide rail (13) parallel to leading screw (10) is connected with, the slide rail (13) is located on sliding shoe (11).
6. a kind of excavation machine tension adjustment mechanism according to claim 1, it is characterised in that：Opened on the sliding shoe (11)
Provided with sliding groove (15), tensioning wheel (8) two ends are fixedly connected with the fixing axle (20) being embedded in sliding groove (15), described
One end of the remote support (1) of gas spring (19) is connected in fixing axle (20).
7. a kind of excavation machine tension adjustment mechanism according to claim 6, it is characterised in that：Set in the sliding groove (15)
It is equipped with the limited block (23) slid up and down, the limited block (23) and is fixedly connected with bearing (21), the fixing axle (20) turns
Dynamic to be connected in bearing (21), the gas spring (19) is connected to the outside of limited block (23).
8. a kind of excavation machine tension adjustment mechanism according to claim 7, it is characterised in that：The sliding groove (15) it is interior
The neck (16) extended along sliding groove (15) length direction is offered on wall, the both sides of the sliding shoe (11) are fixedly connected with card
It is connected on the fixture block (17) in neck (16).
9. a kind of excavation machine tension adjustment mechanism according to claim 8, it is characterised in that：Gas spring (19) stretch
Contracting distance is more than the length of sliding groove (15).
10. a kind of excavation machine tension adjustment mechanism according to claim 9, it is characterised in that：Gas spring (19) spiral shell
Line is connected on sliding shoe (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720154874.1U CN206510235U (en) | 2017-02-21 | 2017-02-21 | A kind of excavation machine tension adjustment mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720154874.1U CN206510235U (en) | 2017-02-21 | 2017-02-21 | A kind of excavation machine tension adjustment mechanism |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206510235U true CN206510235U (en) | 2017-09-22 |
Family
ID=59868543
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720154874.1U Expired - Fee Related CN206510235U (en) | 2017-02-21 | 2017-02-21 | A kind of excavation machine tension adjustment mechanism |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206510235U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108673313A (en) * | 2018-06-27 | 2018-10-19 | 江门市蓬江区珠西智谷智能装备协同创新研究院 | A kind of sanding and polishing machine people |
| CN109065259A (en) * | 2018-07-23 | 2018-12-21 | 铜陵精迅特种漆包线有限责任公司 | A kind of production of enamel wire technique |
| CN109243705A (en) * | 2018-07-23 | 2019-01-18 | 铜陵精迅特种漆包线有限责任公司 | A kind of enameled wire production line |
| CN111137745A (en) * | 2019-12-26 | 2020-05-12 | 江苏中畅精密科技有限公司 | Tension control device for diamond wire saw production |
| CN111775353A (en) * | 2020-06-10 | 2020-10-16 | 浙江浦江中星有限公司 | High-efficient solar cell silicon chip cutterbar |
-
2017
- 2017-02-21 CN CN201720154874.1U patent/CN206510235U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108673313A (en) * | 2018-06-27 | 2018-10-19 | 江门市蓬江区珠西智谷智能装备协同创新研究院 | A kind of sanding and polishing machine people |
| CN109065259A (en) * | 2018-07-23 | 2018-12-21 | 铜陵精迅特种漆包线有限责任公司 | A kind of production of enamel wire technique |
| CN109243705A (en) * | 2018-07-23 | 2019-01-18 | 铜陵精迅特种漆包线有限责任公司 | A kind of enameled wire production line |
| CN109243705B (en) * | 2018-07-23 | 2019-10-25 | 铜陵精迅特种漆包线有限责任公司 | A kind of enameled wire production line |
| CN111137745A (en) * | 2019-12-26 | 2020-05-12 | 江苏中畅精密科技有限公司 | Tension control device for diamond wire saw production |
| CN111775353A (en) * | 2020-06-10 | 2020-10-16 | 浙江浦江中星有限公司 | High-efficient solar cell silicon chip cutterbar |
| CN111775353B (en) * | 2020-06-10 | 2022-05-31 | 浙江浦江中星有限公司 | High-efficient solar cell silicon chip cutterbar |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN206510235U (en) | A kind of excavation machine tension adjustment mechanism | |
| CN207030544U (en) | A kind of ribbon up- coiler | |
| CN207738225U (en) | A kind of looping device of cable | |
| CN206969095U (en) | One kind automatically twines glue sealing machine | |
| CN206417665U (en) | A kind of rim charge winder | |
| CN205526990U (en) | Antivibration drum defeated absolutely | |
| CN206297258U (en) | A kind of adjustable printing cut paper paper pressing device | |
| CN208576804U (en) | A kind of packing case adhesive tape enwinding device | |
| CN103072217A (en) | Cooling device for rubber strip | |
| CN207210646U (en) | A kind of wrap-up in rapier loom | |
| CN213679230U (en) | Lead frame for tin wire winding machine | |
| CN206751065U (en) | A kind of rewinding machine | |
| CN203579918U (en) | Multi-wire cutting machine | |
| CN207190209U (en) | A kind of draw-gear used for iron wire rubber coating machine | |
| CN106494069B (en) | Adjustable printing cut paper paper pressing device | |
| CN207256378U (en) | Cutting machine side retracting device | |
| CN107416573A (en) | A kind of high evenness impregnation PVA ball leather uses base fabric equipment | |
| CN205045597U (en) | Cable is sulphur line accumulator even | |
| CN205387213U (en) | Eiderdown baling press | |
| CN208099662U (en) | Self demixing high speed drawing welding wire coiling machine | |
| CN206520044U (en) | A kind of stringing machine | |
| CN209035162U (en) | A kind of automatic wire wire drawing admission machine | |
| CN107685090A (en) | One kind is put the first edge on a knife or a pair of scissors rewinding machine | |
| CN208164039U (en) | A kind of multi-line cutting machine that cutting line tension effects are good | |
| CN206384643U (en) | Woven bag separate machine feed device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170922 Termination date: 20180221 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |