CN103962885A - Machine tool safety door structure - Google Patents
Machine tool safety door structure Download PDFInfo
- Publication number
- CN103962885A CN103962885A CN201410188669.8A CN201410188669A CN103962885A CN 103962885 A CN103962885 A CN 103962885A CN 201410188669 A CN201410188669 A CN 201410188669A CN 103962885 A CN103962885 A CN 103962885A
- Authority
- CN
- China
- Prior art keywords
- safety door
- valve
- cylinder
- magnetic
- control device
- 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.)
- Granted
Links
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 3
- 229910052782 aluminium Inorganic materials 0.000 claims description 3
- 239000004411 aluminium Substances 0.000 claims description 3
- 238000006073 displacement reaction Methods 0.000 claims description 3
- 230000007423 decrease Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000004807 localization Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000001737 promoting effect Effects 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000001595 contractor effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q11/00—Accessories fitted to machine tools for keeping tools or parts of the machine in good working condition or for cooling work; Safety devices specially combined with or arranged in, or specially adapted for use in connection with, machine tools
- B23Q11/08—Protective coverings for parts of machine tools; Splash guards
- B23Q11/0891—Protective coverings for parts of machine tools; Splash guards arranged between the working area and the operator
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q11/00—Accessories fitted to machine tools for keeping tools or parts of the machine in good working condition or for cooling work; Safety devices specially combined with or arranged in, or specially adapted for use in connection with, machine tools
- B23Q11/0078—Safety devices protecting the operator, e.g. against accident or noise
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Auxiliary Devices For Machine Tools (AREA)
Abstract
The invention discloses a machine tool safety door structure. The machine tool safety door structure comprises a machine tool body with a control device, a safety door supporting frame arranged on the machine tool body, a safety door and an air cylinder, wherein the air cylinder is connected with the control device, a piston of the air cylinder is connected with the safety door, the safety door and the safety door supporting frame are connected movably, the control device drives the safety door to move along the safety door supporting frame through the air cylinder, and therefore the safety door can be opened or closed. The machine tool safety door structure is simple in structure, small in use space and convenient to arrange, controls the opening and closing of the automatic door through the function of the control device system of a machine tool, additionally has a protection function, resolves the efficiency problem caused by manual operation of an operator, lightens the workload for the operator, is user-friendly and saves time.
Description
Technical field
The present invention relates to Digit Control Machine Tool exit structure technical field, relate in particular to machine safety door.
Background technology
The lathe automatic safety door existing is at present in various forms, there are the structures such as motor servo, oil hydraulic cylinder, cam, control system and structure relative complex, large, high in cost of production take up space on relatively small-sized lathe, in realizing the transition of producing as upgrading and automation, need higher cost to drop into, be unfavorable for promoting on a large scale.
Summary of the invention
The object of the invention is to disclose machine safety door, solved existing lathe automatic safety door complex structure, take up space large, cost is high, is unfavorable for the problem of promoting on a large scale.
For achieving the above object, the present invention adopts following technical scheme:
Machine safety door, comprise be provided with control device machine body, be located at safety door support, safety door and cylinder on this machine body; The piston that cylinder connects control device and cylinder connects safety door, and safety door and safety door support are flexibly connected; Control device orders about safety door along the displacement of safety door support by cylinder, thereby realize, safety door is opened or closure.
Further, also comprise the first magnetic valve, the second magnetic valve, first throttle valve and the second choke valve; The normal opening of the first magnetic valve connects the normally closed port of the second magnetic valve, and the second magnetic valve connects the first valve of cylinder by first throttle valve; The normally closed port of the first magnetic valve connects the second valve of cylinder by the second choke valve.
Further, also comprise the 3rd choke valve and the 4th choke valve; The normal opening of described the first magnetic valve connects the normally closed port of described the second magnetic valve by the 3rd choke valve; The second valve of the normally closed port of described the first magnetic valve, the 4th choke valve, described the second choke valve and described cylinder is connected successively.
Further, described first throttle valve, described the second choke valve, described the 3rd choke valve and described the 4th choke valve are one-way throttle valve.
Further, described cylinder is fixed on described safety door support, and the piston of cylinder is connected by aluminium block with safety door.
Further, also comprise that safety door is opened or closed magnetic sensible switch for responding to, magnetic sensible switch is connected with described control device.
Compared with prior art, beneficial effect of the present invention:
The technology of the present invention belongs to Digit Control Machine Tool exit structure technical field, relates to Digit Control Machine Tool, and the association areas such as machining center are new and innovative technology in safety door field.The object of this invention is to provide a kind of simple in structurely, low cost, and have the automatically-controlled door safety guard of automatic protection function, prevents in power-off, realizes self-protection function die in the situation that.Problems of the prior art have been solved.
The present invention adopts above structure, and the unlatching of automatically-controlled door and close and can effectively realize self-protection reduces operating personnel's workload, improves the efficiency of operating personnel's work, and equipment investment cost is low, is conducive to equipment automatic updating on a large scale.
From profile and structure, the present invention is simple in structure, utilize space little, layout is convenient, the function of utilizing machine control unit system to carry is controlled the unlatching of automatically-controlled door with closed, increases safeguard function, solves the efficiency that operating personnel's manual operation produces, reduce operating personnel's workload, not only hommization but also save time.
Accompanying drawing explanation
In order to be illustrated more clearly in the technical scheme in the embodiment of the present invention, below the accompanying drawing of required use during embodiment is described is briefly described, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skills, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is shown in the present, the front elevational schematic of machine safety door embodiment;
Fig. 2 is that schematic diagram is looked on a left side of Fig. 1;
Fig. 3 is aerodynamic arrangement's schematic diagram embodiment illustrated in fig. 1;
In figure, 1-machine body; 2-safety door support; 3-safety door; 4-cylinder; The piston of 41-cylinder; The first valve of 42-cylinder; The second valve of 43-cylinder; 5-the first magnetic valve; The normal opening of 51-the first magnetic valve; The normally closed port of 52-the first magnetic valve; 6-the second magnetic valve; The normally closed port of 61-the second magnetic valve; 7-first throttle valve; 8-the second choke valve; 9-the 3rd choke valve; 10-the 4th choke valve; 101-magnetic sensible switch.
The specific embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only the present invention's part embodiment, rather than whole embodiment.
Embodiment machine safety door as shown in Figure 1 to Figure 3, comprise be provided with control device machine body 1, be located at safety door support 2, safety door 3 and cylinder 4 on this machine body 1; The piston 41 that cylinder 4 connects control device and cylinder connects safety door 3, and safety door 3 and safety door support 2 are flexibly connected; Control device orders about safety door 3 along 2 displacements of safety door support by cylinder 4, thereby realize, safety door 3 is opened or closure.
The present embodiment also comprises the first magnetic valve 5, the second magnetic valve 6, first throttle valve 7 and the second choke valve 8; Normally closed port 61, the second magnetic valves 6 that the normal opening 51 of the first magnetic valve connects the second magnetic valve connect the first valve 42 of cylinder by first throttle valve 7; The normally closed port 52 of the first magnetic valve connects the second valve 43 of cylinder by the second choke valve 8.As to further improvement of this embodiment, also comprise the 3rd choke valve 9 the 4th choke valve 10.The normal opening 51 of the first magnetic valve connects the normally closed port 61 of the second magnetic valve by the 3rd choke valve 9; The second valve 43 of the normally closed port 52 of the first magnetic valve, the 4th choke valve 10, the second choke valve 8 and cylinder is connected successively.First throttle valve 7, the second choke valve 8, the 3rd choke valve 9 and the 4th choke valve 10 are one-way throttle valve.
Cylinder 4 is fixed on safety door support 2, and the piston 41 of cylinder is connected by aluminium block with safety door 3.
The present embodiment also comprises that safety door 3 is opened or closed magnetic sensible switch 101 for responding to, and magnetic sensible switch 101 is connected with control device.
Other structure of the present embodiment machine safety door is referring to prior art.
As to the further illustrating of the present embodiment, its operation principle is now described.In normal boot-strap or program normal process process, no energising is not in open mode for the first magnetic valve 5, and the second magnetic valve 6 energisings are in normally open, and cylinder piston rises and drives safety door rising (being that safety door is opened); When the first magnetic valve 5 energisings are in normally off (this is while pressing Xiamen decline button or when machine tooling formula finishes), the second magnetic valve 6 energising is in opening (the second magnetic valve 6 only in power-off time just closed), and cylinder piston declines and drives safety door decline (being that safety door is closed).
Now as suddenly power-off, the second magnetic valve 6 closures, the region of a sealing of the first valve 42 to second magnetic valve 6 moulding of cylinder, the gas in cylinder 4 cannot be discharged, and safety door 3 is still held open dress state; Now the second magnetic valve 6 is normally closed, and the first magnetic valve 5 is often opened no power.In case of "on" position is cut off suddenly source of the gas, the gas in cylinder 4 is under the effect of first throttle valve 7, the second choke valve 8, the 3rd choke valve 9, the 4th choke valve 10, and door is understood slow decreasing, and this decrease speed can be by throttle valve control.The in the situation that can preventing in power-off or cut off source of the gas, these two kinds of situations protect operating personnel's safety.Why the principle that door can slow decreasing: cylinder 4 will decline, and the gas in the first valve 42 of cylinder will be discharged outward, and the second valve 43 of cylinder will have source of the gas to enter, and enters without source of the gas and now die is now described when died in source in "on" position incision; Gas in the first valve 42 of cylinder will be discharged the gravity exhaust outward that can only use cylinder door itself, and first throttle valve 7 can be controlled the size of exhaust, the speed that namely door declines.
As further illustrating the present embodiment, workflow when workpiece is delivered to the present embodiment by automatic feed mechanism is now described: positioning cylinder 2 is implemented contractive action, acrylic 4 is located to toward localization tool central motion to spacing in both sides, now localization tool negative pressure of vacuum absorption workpiece, then location acrylic 4 is pushed in the overhanging action of positioning cylinder 2 enforcement open, and location action completes.
The present invention is not limited to above-mentioned embodiment, if various changes of the present invention or modification are not departed to the spirit and scope of the present invention, if within these changes and modification belong to claim of the present invention and equivalent technologies scope, the present invention is also intended to comprise these changes and modification.
Claims (6)
1. machine safety door, is characterized in that: comprise be provided with control device machine body, be located at safety door support, safety door and cylinder on this machine body; The piston that cylinder connects control device and cylinder connects safety door, and safety door and safety door support are flexibly connected; Control device orders about safety door along the displacement of safety door support by cylinder, thereby realize, safety door is opened or closure.
2. machine safety door according to claim 1, is characterized in that: also comprise the first magnetic valve, the second magnetic valve, first throttle valve and the second choke valve; The normal opening of the first magnetic valve connects the normally closed port of the second magnetic valve, and the second magnetic valve connects the first valve of cylinder by first throttle valve; The normally closed port of the first magnetic valve connects the second valve of cylinder by the second choke valve.
3. machine safety door according to claim 2, is characterized in that: also comprise the 3rd choke valve and the 4th choke valve; The normal opening of described the first magnetic valve connects the normally closed port of described the second magnetic valve by the 3rd choke valve; The second valve of the normally closed port of described the first magnetic valve, the 4th choke valve, described the second choke valve and described cylinder is connected successively.
4. machine safety door according to claim 3, is characterized in that: described first throttle valve, described the second choke valve, described the 3rd choke valve and described the 4th choke valve are one-way throttle valve.
5. machine safety door according to claim 1, is characterized in that: described cylinder is fixed on described safety door support, and the piston of cylinder is connected by aluminium block with safety door.
6. machine safety door according to claim 1, is characterized in that: also comprise that safety door is opened or closed magnetic sensible switch for responding to, magnetic sensible switch is connected with described control device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410188669.8A CN103962885B (en) | 2014-05-06 | 2014-05-06 | Machine tool safety door structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410188669.8A CN103962885B (en) | 2014-05-06 | 2014-05-06 | Machine tool safety door structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103962885A true CN103962885A (en) | 2014-08-06 |
| CN103962885B CN103962885B (en) | 2017-02-22 |
Family
ID=51233145
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410188669.8A Expired - Fee Related CN103962885B (en) | 2014-05-06 | 2014-05-06 | Machine tool safety door structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103962885B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105773294A (en) * | 2016-03-31 | 2016-07-20 | 苏州亚思科精密数控有限公司 | Noise-proof numerically-controlled machine tool shield |
| CN108907336A (en) * | 2018-06-20 | 2018-11-30 | 谭明 | Numerical-control double-station cutting machine and its control method |
| CN112224985A (en) * | 2020-10-30 | 2021-01-15 | 江苏绿港现代农业发展有限公司 | Improved generation coiling machine |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2531393B2 (en) * | 1991-11-01 | 1996-09-04 | 村田機械株式会社 | Machine tool door safety device |
| JP2002337033A (en) * | 2001-05-11 | 2002-11-26 | Brother Ind Ltd | Storage structure of input device in machine tool |
| CN101814716A (en) * | 2010-03-31 | 2010-08-25 | 银川英奥特自控有限公司 | Current signal detecting switch and valve control and fault protection device |
| CN201572972U (en) * | 2009-12-16 | 2010-09-08 | 浙江万丰科技开发有限公司 | Equipment for deburring automobile hub |
| CN102562721A (en) * | 2012-03-14 | 2012-07-11 | 北京岳能科技有限公司 | Pneumatic long-stroke actuating mechanism and control method thereof |
| CN202479883U (en) * | 2012-02-14 | 2012-10-10 | 上海三一精机有限公司 | Lifting machine tool protection door and hydraulic control device thereof |
| CN202592112U (en) * | 2012-06-04 | 2012-12-12 | 储士钊 | Automatic safety door device of numerically-controlled machine tool device |
| CN202895647U (en) * | 2012-10-17 | 2013-04-24 | 德马格塑料机械（宁波）有限公司 | Control device for safety door of injection molding machine |
| CN203380691U (en) * | 2013-06-27 | 2014-01-08 | 上海三一精机有限公司 | Column shield structure and vertical machine |
| CN204075867U (en) * | 2014-05-06 | 2015-01-07 | 深圳市远洋翔瑞机械股份有限公司 | Machine safety door |
-
2014
- 2014-05-06 CN CN201410188669.8A patent/CN103962885B/en not_active Expired - Fee Related
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2531393B2 (en) * | 1991-11-01 | 1996-09-04 | 村田機械株式会社 | Machine tool door safety device |
| JP2002337033A (en) * | 2001-05-11 | 2002-11-26 | Brother Ind Ltd | Storage structure of input device in machine tool |
| CN201572972U (en) * | 2009-12-16 | 2010-09-08 | 浙江万丰科技开发有限公司 | Equipment for deburring automobile hub |
| CN101814716A (en) * | 2010-03-31 | 2010-08-25 | 银川英奥特自控有限公司 | Current signal detecting switch and valve control and fault protection device |
| CN202479883U (en) * | 2012-02-14 | 2012-10-10 | 上海三一精机有限公司 | Lifting machine tool protection door and hydraulic control device thereof |
| CN102562721A (en) * | 2012-03-14 | 2012-07-11 | 北京岳能科技有限公司 | Pneumatic long-stroke actuating mechanism and control method thereof |
| CN202592112U (en) * | 2012-06-04 | 2012-12-12 | 储士钊 | Automatic safety door device of numerically-controlled machine tool device |
| CN202895647U (en) * | 2012-10-17 | 2013-04-24 | 德马格塑料机械（宁波）有限公司 | Control device for safety door of injection molding machine |
| CN203380691U (en) * | 2013-06-27 | 2014-01-08 | 上海三一精机有限公司 | Column shield structure and vertical machine |
| CN204075867U (en) * | 2014-05-06 | 2015-01-07 | 深圳市远洋翔瑞机械股份有限公司 | Machine safety door |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105773294A (en) * | 2016-03-31 | 2016-07-20 | 苏州亚思科精密数控有限公司 | Noise-proof numerically-controlled machine tool shield |
| CN108907336A (en) * | 2018-06-20 | 2018-11-30 | 谭明 | Numerical-control double-station cutting machine and its control method |
| CN108907336B (en) * | 2018-06-20 | 2024-01-12 | 谭明 | Control method of numerical control double-station cutting machine |
| CN112224985A (en) * | 2020-10-30 | 2021-01-15 | 江苏绿港现代农业发展有限公司 | Improved generation coiling machine |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103962885B (en) | 2017-02-22 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103962885A (en) | Machine tool safety door structure | |
| CN204308568U (en) | A kind of ventilation and dust removal workbench | |
| CN204052276U (en) | A kind of automatic cleaning equipment for cleaning machine processing parts | |
| CN204720084U (en) | A kind of teaching practice numerically controlled lathe | |
| CN105697475A (en) | Potential energy recycling system and method of higher-position extractor | |
| CN209503649U (en) | A kind of machine tool protective device of achievable large-scale workpiece top loading and unloading | |
| CN104723335A (en) | Lining lifting manipulator of sewing machine part assembling machine | |
| CN204075867U (en) | Machine safety door | |
| CN201226130Y (en) | Process control cabinet convenient to maintain | |
| CN107695220B (en) | A kind of priming system automatic necking machine | |
| CN206029446U (en) | Machining center with two gate -type emergency exits | |
| CN107470656A (en) | A kind of novel hydraulic tailstock core shaft structure | |
| CN104148674A (en) | Automatic numerical control lathe | |
| CN202910317U (en) | Turnover protective door structure for shield of micro computerized numerical control lathe | |
| CN203804674U (en) | Novel double door folding type safety door of numerical control machine tool | |
| CN204524799U (en) | A kind of machine tool electric cabinet | |
| CN202114178U (en) | Safe hand beating mechanism of punch press | |
| CN203649360U (en) | Automatic crucible cover | |
| CN204108075U (en) | A kind of punch press for worked door | |
| CN204004071U (en) | Clutch booster | |
| CN204687228U (en) | A kind of end joint arrangement of injection molding mechanical arm | |
| CN204423015U (en) | Route controller | |
| CN204076709U (en) | A kind of automatic mold splitting die clamp | |
| CN203897457U (en) | Beading machine high in safety | |
| CN210677928U (en) | Split multi-spindle tool magazine |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address |
Address after: 518000 Guangdong province Shenzhen City Pingshan Pingshan office Bi Ridge Community Stone Road No. 11, No. 2 building Patentee after: SHENZHEN OCEAN XIANGRUI MACHINERY CO.,LTD. Address before: 518000 Guangdong province Shenzhen City Pingshan Pingshan office Bi Ridge Community Stone Road No. 11, No. 2 building on the third floor Patentee before: SHENZHEN YUANYANG XIANGRUI MACHINERY Co.,Ltd. |
|
| TR01 | Transfer of patent right |
Effective date of registration: 20210107 Address after: 518000 101, 2300152, west of 9 Yongxin Road, biling community, biling street, Pingshan District, Shenzhen City, Guangdong Province Patentee after: Shenzhen giant Allen Holding Co.,Ltd. Address before: No.2 workshop, No.11 Shijia Road, biling community, Pingshan office, Pingshan New District, Shenzhen, Guangdong 518000 Patentee before: SHENZHEN OCEAN XIANGRUI MACHINERY Co.,Ltd. |
|
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20210517 Address after: 518000 4th floor, factory building, Delphi Industrial Park, north of Jinniu East Road and east of Jinlan Road, No. 50, Jinniu East Road, Longtian street, Pingshan District, Shenzhen City, Guangdong Province Patentee after: SHENZHEN OCEAN XIANGRUI MACHINERY Co.,Ltd. Address before: 518000 101, 2300152, west of 9 Yongxin Road, biling community, biling street, Pingshan District, Shenzhen City, Guangdong Province Patentee before: Shenzhen giant Allen Holding Co.,Ltd. |
|
| TR01 | Transfer of patent right | ||
| 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: 20170222 |