CN209811912U - Automatic change stone material wall burnishing and polishing's dustless equipment - Google Patents

Automatic change stone material wall burnishing and polishing's dustless equipment Download PDF

Info

Publication number
CN209811912U
CN209811912U CN201920601855.8U CN201920601855U CN209811912U CN 209811912 U CN209811912 U CN 209811912U CN 201920601855 U CN201920601855 U CN 201920601855U CN 209811912 U CN209811912 U CN 209811912U
Authority
CN
China
Prior art keywords
polishing
motor
shell
dust
controller
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
CN201920601855.8U
Other languages
Chinese (zh)
Inventor
何子龙
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.)
Deren World (beijing) Environmental Protection Technology Co Ltd
Original Assignee
Deren World (beijing) Environmental Protection Technology 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 Deren World (beijing) Environmental Protection Technology Co Ltd filed Critical Deren World (beijing) Environmental Protection Technology Co Ltd
Priority to CN201920601855.8U priority Critical patent/CN209811912U/en
Application granted granted Critical
Publication of CN209811912U publication Critical patent/CN209811912U/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Landscapes

  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)

Abstract

The utility model relates to a dust-free equipment for automatically polishing stone wall surfaces, which comprises a shell and a bracket, wherein the shell is divided into a closed dust collecting chamber and a polishing chamber with an opening at the lower end by a partition plate arranged in the middle, a first motor is arranged in the installation chamber, the top of the first motor is connected with the top of the shell through a first electric telescopic rod, the bottom of the first motor is connected with a turntable through the partition plate in a driving way, the top center of the polishing disk is provided with a polishing motor which runs through the turntable, the top of the polishing motor is connected with a mounting plate arranged above the turntable through a second electric telescopic rod, the top center of the polishing disk is provided with a polishing motor which runs through the turntable, the top of the polishing motor is connected with the mounting plate arranged above the turntable through a third electric telescopic rod, the top of the shell is connected with the bracket, the shell can move up and down, be equipped with the controller on the casing, the utility model discloses do not need manual operation, automatic to wall burnishing and polishing.

Description

Automatic change stone material wall burnishing and polishing's dustless equipment
Technical Field
The utility model relates to a wall equipment field of polishing, concretely relates to automatic change stone material wall burnishing and polishing's dustless equipment.
Background
Nowadays, as the number of young people entering the decoration industry is less and less, people like to enter factories and have partial work. And the wall that decorates, especially the wall is indispensable is made white or other, all can not leave the wall and polish, and the wall of especially stone material is uneven more, needs polish polishing, and many people do not want to do this work, has caused the unbalance of supply and demand and the rapid rising of workman's master worker's price, and do not necessarily find master yet, and the work efficiency of artifical polishing is slower, causes occupational disease (pneumoconiosis etc.) easily.
SUMMERY OF THE UTILITY MODEL
In order to solve the problems, the utility model aims at providing an automatic change stone material wall burnishing and polishing's dustless equipment does not need manual operation, automatic to wall burnishing and polishing.
The utility model aims at realizing through the following technical scheme: the polishing machine comprises a shell and a bracket, wherein the shell is divided into a closed dust collecting chamber and a polishing chamber with an opening at the lower end by a partition plate arranged in the middle, an independent installation chamber is arranged at the center of the dust collecting chamber, a first motor is arranged in the installation chamber, the top of the first motor is connected with the top of the shell through a first electric telescopic rod, the bottom of the first motor is connected with a rotary table through the partition plate in a driving way, an equal-size polishing disc and a polishing disc are arranged at the bottom of the rotary table in parallel, a polishing motor penetrating through the rotary table is arranged at the center of the top of the polishing disc, the top of the polishing motor is connected with a mounting plate arranged above the rotary table through a second electric telescopic rod, a polishing motor penetrating through the rotary table is arranged at the center of the top of the polishing disc, the top of the polishing motor is connected with the mounting plate, the top of casing links to each other with the support, support and wall parallel arrangement, the room opening of polishing of casing is towards the wall, the casing can remove about along the support, be equipped with the controller on the casing, first motor, first electric telescopic handle, grinding motor, polishing motor, second electric telescopic handle, fan and third electric telescopic handle all are connected with the controller.
In a preferred embodiment, the support comprises a vertical guide rail arranged on the ground and a transverse guide rail arranged on the vertical guide rail, wherein the transverse guide rail is arranged perpendicular to the vertical guide rail.
In a preferred embodiment, a vertical ball screw is arranged on one side of the vertical guide rail, the ball screw is in driving connection with a second motor arranged at the bottom of the ball screw, a sliding block corresponding to the vertical guide rail and a nut corresponding to the ball screw are arranged on the transverse guide rail, and the second motor is connected with a controller.
In a preferred embodiment, a guide wheel is arranged on the cross guide rail, the guide wheel is connected with the shell through a transmission shaft, the transmission shaft is in driving connection with a third motor through a chain, the third motor is arranged on the shell, and the third motor is connected with the controller.
In a preferred embodiment, the turntable is provided with a through hole for the grinding motor and the polishing motor to pass through, a vertical clamping groove is arranged in the through hole, clamping strips corresponding to the clamping grooves are arranged on the grinding motor and the polishing motor, and the grinding motor and the polishing motor are connected with the through hole in a sliding manner.
In a preferred embodiment, closely-arranged first distance sensors are arranged on the inner walls of the two directions of the transverse movement of the shell, the directions of the openings of the grinding chambers detected by the first distance sensors are consistent, and the first distance sensors are connected with a controller.
In a preferred embodiment, the outer walls of the two directions of the transverse movement of the shell are respectively provided with a second distance sensor, the direction detected by the second distance sensors is consistent with the direction of the transverse movement of the shell, and the second distance sensors are connected with the controller.
In a preferred embodiment, the outer walls of the two directions of the transverse movement of the shell are respectively provided with a glossiness instrument, the detection direction of the glossiness instruments is consistent with the direction of the opening of the polishing chamber, and the glossiness instruments are connected with the controller.
In a preferred embodiment, the center of the bottom of the polishing disk is provided with a third distance sensor, the third distance sensor detects that the direction of the opening of the polishing chamber is consistent, and the third distance sensor is connected with the controller.
The utility model has the advantages that:
1. the utility model is provided with the rotary disc, the polishing disc and the polishing disc, and can polish after polishing, thereby improving the finish degree of the wall surface and saving the time of secondary polishing;
2. the utility model is provided with a dust collecting chamber and a fan, which can absorb dust and realize dust-free polishing;
3. the utility model is provided with an electric telescopic rod, which can adjust the distance between the rotary disc, the polishing disc and the wall surface;
4. the utility model discloses be equipped with first distance sensor and gloss appearance, the difference in height and the glossiness of intellectual detection system wall.
5. The utility model discloses be equipped with the support, the casing can follow the support and slide from top to bottom and from side to side, detaches artifical handheld.
Drawings
The present invention will be described in further detail with reference to the accompanying drawings.
FIG. 1 is a schematic view of a dust-free apparatus according to an embodiment of the present invention;
FIG. 2 is a bottom view of a dust-free apparatus according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a bracket according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a turntable according to an embodiment of the present invention.
In the figure:
1. a housing; 2. a dust collection chamber; 3. a grinding chamber; 4. an installation chamber; 5. a partition plate; 6. a first electric telescopic rod; 7. a first motor; 8. a fan; 9. a second electric telescopic rod; 10. polishing the motor; 11. grinding disc; 12. a third electric telescopic rod; 13. polishing the motor; 14. a polishing disk; 15. mounting a plate; 16. a turntable; 17. a first distance sensor; 18. a second distance sensor; 19. a gloss meter; 20. a third distance sensor; 21. a vertical guide rail; 22. a transverse guide rail; 23. a slider; 24. a nut; 25. a guide wheel; 26. a third motor; 27. a drive shaft; 28. a chain; 29. a second motor; 30. a through hole; 31. a card slot; 32. clamping the strip; 33. a controller; 34. a ball screw.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention. Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention.
The invention will be further described with reference to the drawings and specific examples.
As shown in fig. 1-4, the dust-free equipment for automatic stone wall surface polishing of the embodiment of the present invention comprises a housing 1 and a bracket, the housing 1 is divided into a closed dust chamber 2 and a polishing chamber 3 with an opening at the lower end by a partition plate 5 arranged in the middle, the dust chamber 2 is provided with an opening, the center of the dust chamber 2 is provided with an independent installation chamber 4, the installation chamber 4 is internally provided with a first motor 7, the top of the first motor 7 is connected with the top of the housing 1 through a first electric telescopic rod 6, the bottom of the first motor 7 is connected with a turntable 16 through the partition plate 5 in a driving manner, the distance between the turntable 16 and the wall surface can be adjusted through the first electric telescopic rod 6, the bottom of the turntable 16 is provided with a polishing disc 11 and a polishing disc 14 which are as large as possible, the polishing disc 11 is used as a coarse polishing wheel, the polishing disc 14 is used as a fine polishing wheel, the turntable 16 rotates, the grinding disc 11 rotates along with the rotary disc 16, so that the grinding area is increased, the working efficiency is increased, the polishing is carried out while grinding, and the time is saved. A polishing motor 10 penetrating through a turntable 16 is arranged at the center of the top of a polishing disc 11, the top of the polishing motor 10 is connected with a mounting plate 15 arranged above the turntable 16 through a second electric telescopic rod 9, the mounting plate 15 is mounted on the part, penetrating through a partition plate 5, of a first motor 7, and the distance from the polishing motor 10 to the wall surface can be adjusted through the second electric telescopic rod 9 according to the roughness of the wall surface; polishing disc 14's top center is equipped with the polishing motor 13 that runs through carousel 16, polishing motor 13's top is passed through third electric telescopic handle 12 and is connected with the mounting panel 15 that sets up in carousel 16 top, polishing disc 14's bottom center is equipped with third distance sensor 20, the direction that third distance sensor 20 detected is the direction of 3 open-ended directions of room of polishing unanimous, third distance sensor 20 is connected with controller 33, it polishes earlier to guarantee, otherwise polishing disc 14 direct contact unevenness's wall can cause the damage, third distance sensor 20 is responsible for detecting the distance of polishing disc 14 to the wall, reach the distance of setting for and also be the distance of wall to polishing disc 14 after polishing disc 11 polishes, polishing disc 14 just can move down under the effect of third electric telescopic handle 12 and polish.
Be equipped with fan 8 on the baffle 5, the dust after 8 will polish is inhaled in dust collecting chamber 2 to the fan, carries out dustless operation, avoids the dust to fly upward. The top of casing 1 links to each other with the support, support and wall parallel arrangement, 3 openings in the room of polishing of casing 1 towards the wall, and casing 1 can remove manual operation from moving about from top to bottom along the support, and casing 1 sets up on the support, moves about from top to bottom along the support and carries out polishing of whole wall. The shell 1 is provided with a controller 33, and the first motor 7, the first electric telescopic rod 6, the grinding motor 10, the polishing motor 13, the second electric telescopic rod 9, the fan 8 and the third electric telescopic rod 12 are all connected with the controller 33. The controller 33 is a master device for controlling the starting, speed regulation, braking and reversing of the motor by changing the wiring of the master circuit or control circuit and changing the resistance value in the circuit according to a predetermined sequence. The system consists of a program counter, an instruction register, an instruction decoder, a time sequence generator and an operation controller, and is a decision mechanism for issuing commands, namely, the decision mechanism is used for coordinating and commanding the operation of the whole computer system.
The support comprises a vertical guide rail 21 arranged on the ground and a transverse guide rail 22 arranged on the vertical guide rail 21, wherein the vertical guide rail 21 can be one or more, the stability of the support is ensured, and the transverse guide rail 22 is perpendicular to the vertical guide rail 21.
Vertical ball screw 34 is arranged on one side of vertical guide rail 21, ball screw 34 is in driving connection with second motor 29 arranged at the bottom of ball screw 34, slide block 23 corresponding to vertical guide rail 21 and nut 24 corresponding to ball screw 34 are arranged on transverse guide rail 22, transverse guide rail 22 is in sliding connection with vertical guide rail 21 through slide block 23, and is in threaded connection with ball screw 34 through nut 24, second motor 29 drives ball screw 34 to rotate, thereby driving transverse guide rail 22 to move up and down along vertical guide rail 21, driving shell 1 to move up and down, and second motor 29 is connected with controller 33.
Be equipped with guide pulley 25 on cross guide 22, the last guide pulley groove that is equipped with of cross guide 22, guide pulley 25 card is established in the guide pulley groove, horizontal migration about along cross guide 22, guide pulley 25 passes through transmission shaft 27 and is connected with casing 1, transmission shaft 27 passes through chain 28 and is connected with the drive of third motor 26, third motor 26 sets up on casing 1, it is rotatory that third motor 26 is rotatory to drive transmission shaft 27 through chain 28, thereby drive guide pulley 25 and rotate, it controls about on cross guide 22 to drive casing 1, guide pulley 25 can be one also can be a plurality ofly, drive through a third motor 26, third motor 26 is connected with controller 33.
The turntable 16 is provided with a through hole 30 for the grinding motor 10 and the polishing motor 13 to pass through, a vertical clamping groove 31 is arranged in the through hole 30, clamping strips 32 corresponding to the clamping groove 31 are arranged on the grinding motor 10 and the polishing motor 13, and the grinding motor 10 and the polishing motor 13 are connected with the through hole 30 in a sliding mode. The grinding motor 10 and the polishing motor 13 are clamped in the through hole 30 and rotate along with the rotation of the rotary table 16, and when the second electric telescopic rod 9 and the third electric telescopic rod 12 stretch, the grinding motor 10 and the polishing motor 13 move up and down along the clamping groove 31.
All be equipped with the first distance sensor 17 of closely arranging on the inner wall of two directions of casing 1 lateral shifting, the length that first distance sensor 17 arranged is the same with the width of casing 1, guarantee that the width of casing 1 lateral shifting can all detect, the direction of 3 open-ended directions in the room of polishing of the direction that first distance sensor 17 detected is unanimous, also promptly towards the wall, before burnishing and polishing, casing 1 detects once on the wall earlier, detect the distance of wall to casing 1 through first distance sensor 17, also promptly find the unsmooth minimum of wall, first distance sensor 17 is connected with controller 33, controller 33 control second electric telescopic handle 9 is flexible, control burnishing disc 11 polishes the minimum of wall, just so can guarantee the planarization of wall.
The outer walls of the two directions of the transverse movement of the shell 1 are respectively provided with a second distance sensor 18, the direction detected by the second distance sensors 18 is consistent with the direction of the transverse movement of the shell 1, namely, the distance from the shell 1 to the boundary walls on the two sides is detected, after the boundary is reached, the shell 1 moves downwards along the vertical guide rail 21 and continues to polish towards the other transverse direction, and the second distance sensors 18 are connected with the controller 33.
All be equipped with glossiness appearance 19 on the outer wall of two directions of casing 1 lateral shifting, the detection direction of glossiness appearance 19 is unanimous with the 3 open-ended directions in room of polishing for detect the glossiness of wall, glossiness appearance 19 is connected with controller 33.
Finally, it should be noted that: the above-mentioned embodiments are only used for illustrating the technical solution of the present invention, and not for limiting the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.

Claims (9)

1. The utility model provides an automatic change stone material wall sanding polishing's dust-free equipment which characterized in that: the polishing machine comprises a shell and a bracket, wherein the shell is divided into a closed dust collecting chamber and a polishing chamber with an opening at the lower end by a partition plate arranged in the middle, an independent installation chamber is arranged at the center of the dust collecting chamber, a first motor is arranged in the installation chamber, the top of the first motor is connected with the top of the shell through a first electric telescopic rod, the bottom of the first motor is connected with a rotary table through the partition plate in a driving way, an equal-size polishing disc and a polishing disc are arranged at the bottom of the rotary table in parallel, a polishing motor penetrating through the rotary table is arranged at the center of the top of the polishing disc, the top of the polishing motor is connected with a mounting plate arranged above the rotary table through a second electric telescopic rod, a polishing motor penetrating through the rotary table is arranged at the center of the top of the polishing disc, the top of the polishing motor is connected with the mounting plate, the top of casing links to each other with the support, support and wall parallel arrangement, the room opening of polishing of casing is towards the wall, the casing can remove about along the support, be equipped with the controller on the casing, first motor, first electric telescopic handle, grinding motor, polishing motor, second electric telescopic handle, fan and third electric telescopic handle all are connected with the controller.
2. The automatic stone wall surface sanding and polishing dust-free equipment of claim 1, characterized in that: the support is including setting up the vertical guide rail on ground and setting up the cross rail on vertical guide rail, the cross rail sets up with vertical guide rail is perpendicular.
3. The automatic stone wall surface sanding and polishing dust-free equipment of claim 2, characterized in that: one side of the vertical guide rail is provided with a vertical ball screw, the ball screw is in driving connection with a second motor arranged at the bottom of the ball screw, the transverse guide rail is provided with a sliding block corresponding to the vertical guide rail and a nut corresponding to the ball screw, and the second motor is connected with the controller.
4. The automatic stone wall surface sanding and polishing dust-free equipment of claim 2, characterized in that: the guide wheel is arranged on the transverse guide rail and connected with the shell through a transmission shaft, the transmission shaft is in driving connection with a third motor through a chain, the third motor is arranged on the shell, and the third motor is connected with the controller.
5. The automatic stone wall surface sanding and polishing dust-free equipment of claim 1, characterized in that: the polishing machine is characterized in that a through hole for the grinding motor and the polishing motor to pass through is formed in the rotary table, a vertical clamping groove is formed in the through hole, clamping strips corresponding to the clamping groove are arranged on the grinding motor and the polishing motor, and the grinding motor and the polishing motor are connected with the through hole in a sliding mode.
6. The automatic stone wall surface sanding and polishing dust-free equipment of claim 1, characterized in that: the inner walls of the two directions of the transverse movement of the shell are respectively provided with a first distance sensor which is closely arranged, the opening direction of the grinding chamber in the direction detected by the first distance sensors is consistent, and the first distance sensors are connected with the controller.
7. The automatic stone wall surface sanding and polishing dust-free equipment of claim 1, characterized in that: the outer walls of the two directions of the transverse movement of the shell are respectively provided with a second distance sensor, the direction detected by the second distance sensors is consistent with the direction of the transverse movement of the shell, and the second distance sensors are connected with the controller.
8. The automatic stone wall surface sanding and polishing dust-free equipment of claim 1, characterized in that: the polishing machine is characterized in that the outer walls of the two directions of the transverse movement of the shell are respectively provided with a glossiness instrument, the detection direction of the glossiness instruments is consistent with the direction of the opening of the polishing chamber, and the glossiness instruments are connected with the controller.
9. The automatic stone wall surface sanding and polishing dust-free equipment of claim 1, characterized in that: the polishing device is characterized in that a third distance sensor is arranged at the center of the bottom of the polishing disk, the opening direction of the polishing chamber detected by the third distance sensor is consistent, and the third distance sensor is connected with the controller.
CN201920601855.8U 2019-04-29 2019-04-29 Automatic change stone material wall burnishing and polishing's dustless equipment Expired - Fee Related CN209811912U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201920601855.8U CN209811912U (en) 2019-04-29 2019-04-29 Automatic change stone material wall burnishing and polishing's dustless equipment

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201920601855.8U CN209811912U (en) 2019-04-29 2019-04-29 Automatic change stone material wall burnishing and polishing's dustless equipment

Publications (1)

Publication Number Publication Date
CN209811912U true CN209811912U (en) 2019-12-20

Family

ID=68882107

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201920601855.8U Expired - Fee Related CN209811912U (en) 2019-04-29 2019-04-29 Automatic change stone material wall burnishing and polishing's dustless equipment

Country Status (1)

Country Link
CN (1) CN209811912U (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109955126A (en) * 2019-04-29 2019-07-02 德仁天下(北京)环保科技有限公司 A kind of dustless equipment of automatization stone metope sanding and polishing
CN111136529A (en) * 2020-02-05 2020-05-12 台州椒江行陈环保科技有限公司 Building wall spot automatic cleaning equipment

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109955126A (en) * 2019-04-29 2019-07-02 德仁天下(北京)环保科技有限公司 A kind of dustless equipment of automatization stone metope sanding and polishing
CN111136529A (en) * 2020-02-05 2020-05-12 台州椒江行陈环保科技有限公司 Building wall spot automatic cleaning equipment
CN111136529B (en) * 2020-02-05 2020-12-08 博兴兴博城建投资集团有限公司 Building wall spot automatic cleaning equipment

Similar Documents

Publication Publication Date Title
CN209811912U (en) Automatic change stone material wall burnishing and polishing's dustless equipment
CN104723197B (en) A kind of flexible iron pan burnishing device
CN107322391B (en) A kind of building wall automatically grinding equipment
CN208304624U (en) Numerical control rolling linear guide grinding machine
CN108608265A (en) Numerical control rolling linear guide grinding machine
CN109955126A (en) A kind of dustless equipment of automatization stone metope sanding and polishing
CN104741993A (en) Device used for polishing outer surface of iron pan
CN214080703U (en) Full-automatic grinding frock of adapter
CN1850449A (en) Grinding automatic compensating device for vertical axis dual-end-face numerical coutrol planar grinding machine
CN211313254U (en) Integrative application equipment of application of polishing
CN204604019U (en) A kind of iron pan burnishing device of flexibility
CN107243794B (en) A kind of inner wall of building automatic leveling system
CN211388330U (en) Numerical control grinding wheel trimming machine
CN115555962A (en) Floor type dust absorption sander and veneer wood surface processing method
CN212192482U (en) Numerical control machine tool for dedusting and polishing of wood boards
CN2930962Y (en) Grinding automatic compensation apparatus for vertical axis double-surface digital control flat grinder
CN204604021U (en) A kind of burnishing device of iron pan outer surface
CN113458797A (en) Drilling and polishing integrated numerical control machine tool
CN212471044U (en) Polishing machine
CN208100072U (en) A kind of polissoir for Hardware fitting
CN108406975A (en) A kind of multifunctional building milling machine
CN210849585U (en) Fan shell processing grinding device
CN207171688U (en) A kind of horizontally moving device for wall surface grinding machine
CN108406598A (en) The grinding wheel autonomous and conditioning system of slideway grinder
CN220128460U (en) Shell surface polishing 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
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20191220

Termination date: 20210429