CN100414282C - Bridge surface water-proofing layer electric shearing equipment - Google Patents
Bridge surface water-proofing layer electric shearing equipment Download PDFInfo
- Publication number
- CN100414282C CN100414282C CNB031144152A CN03114415A CN100414282C CN 100414282 C CN100414282 C CN 100414282C CN B031144152 A CNB031144152 A CN B031144152A CN 03114415 A CN03114415 A CN 03114415A CN 100414282 C CN100414282 C CN 100414282C
- Authority
- CN
- China
- Prior art keywords
- boxshear apparatus
- bridge surface
- electronic
- waterproof layer
- data
- 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
Images
Landscapes
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The present invention relates to a bridge surface water-proofing layer electric shearing instrument which has the advantages of compact structure, complete functions, high testing precision and convenient use. The present invention comprises a base on which a worm screw, a worm wheel, a speed reducer and a guide seat are arranged, wherein the worm screw and the worm wheel are connected with the base by bearings, the worm screw is connected with the speed reducer, a screw rod is connected with the worm wheel by a screw thread, and the other end of the screw rod is connected with a force sensor in a sensor and is connected a shearing piece by a driving rod and the guide seat.
Description
One, technical field:
The present invention relates to the electronic boxshear apparatus of a kind of bridge surface waterproof layer, it is mainly used in the inter-layer shearing strength of measuring between water barrier and concrete bridge deck and the asphalt mat, be applicable to indoor or on-the-spot detection to all kinds of waterproof materials and water barrier, so that analyze the influence rule of factors such as different bridge floor situations, bridge floor treatment measures, asphalt concrete construction temperature and serviceability temperature, thickness of bituminous surface, asphalt type, water barrier type to inter-layer shearing strength
Two, background technology:
All there is not the similar on-the-spot instrument that detects of water barrier and bridge deck concrete and asphalt mat inter-layer shearing strength that is used for both at home and abroad.The similar non-special-purpose test facilities that are used for desk research are abroad arranged, as water barrier being placed on the 6 inches high cement cylindrical specimen, on water barrier, overlay 2 inches thick asphalts that are compacted, in order to determine the shearing strength of the bonding part between cement concrete bridge deck and water barrier, water barrier and the brea bed, test specimen will flatly be placed on the carriage.Then, the asphalt mat part of surface layer part loading in test specimen in sample sheared from cement specimen, measure its displacement and loading force simultaneously, wherein the strain rate of load is 0.25 inch per minute clock, obviously, this test method can not be used for on-the-spot test, and automaticity is not high.The domestic LLM test macro that Chang An University's development is arranged, the purpose of design of this instrument is to be used for shop experiment research, can not be used for on-the-spot test.
Three, summary of the invention:
The present invention provides a kind of bridge surface waterproof layer boxshear apparatus in order to solve the weak point in the above-mentioned background technology, and its compact conformation is multiple functional, and the measuring accuracy height is easy to use.
For achieving the above object, the technical solution used in the present invention is:
The electronic boxshear apparatus of a kind of bridge surface waterproof layer, its special character is: comprise base, base is provided with worm and wormwheel, speed reduction unit and guide bracket, worm and wormwheel is connected with base by bearing, casing, screw rod is threaded with worm gear, the screw rod other end is connected with force transducer in the sensor, and is connected with cutting member with guide bracket by catch bar.
Above-mentioned screw rod can be connected by acme thread with worm gear.
The sensor comprises force transducer and displacement transducer, and force transducer is connected with single-chip microcomputer with displacement transducer.
Can be provided with the zero-setting operation device on the above-mentioned screw rod.
Can be provided with guide pin bushing and set screw on the above-mentioned guide bracket.
Above-mentioned catch bar and cutting member can be the cylindrical guides of sliding friction.
Can be provided with push rod between above-mentioned screw rod and the catch bar
Can be provided with limit switch on the above-mentioned boxshear apparatus.
Above-mentioned displacement transducer can be an incremental encoder.
Can be provided with communication interface on the above-mentioned boxshear apparatus.
Compared with prior art, the advantage and the effect that have of the present invention is as follows:
1, modern design of the present invention, compact conformation, multiple functional, the measuring accuracy height, easy to use.
2, the present invention is by Single-chip Controlling, and step motor drives, and shear rate 0～50mm/min sets arbitrarily.Miniature dot matrix printer can print test number, time, shearing, displacement, various data such as speed; Two-way position LCD can show test parameters at any time, and memory can be stored 20 test for data, also can check each data on LCD.
3, the present invention also has and Computer Communications Interface, can be connected with computing machine to carry out data processing, prints shearing-displacement curve figure, printing reports etc.
4, the key technical indexes of the present invention is as follows:
(1) shear rate: 0～50mm/min
(2) maximum shear stress: 10000N
(3) maximum displacement: 20mm
(4) storage capability: 20 test for data
(5) data collection rate: 0.1mm gathers once
(6) displacement accuracy: 0.5mm
(7) the shearing precision 1%
5, major function of the present invention is as follows:
1. possesses the RS232C serial line interface.
2. power down data are preserved, maximum 20 groups of data.
3. microprinting, printable simple data form.
4. Automatic calendar and time.
5. can on microcomputer, extract data and calculate and show shearing curve.
6. printing reports and curve on microcomputer.
Four, description of drawings:
Fig. 1 is a structure principle chart of the present invention;
Fig. 2 is a drawing instrument master interface synoptic diagram;
Fig. 3 is provided with the window synoptic diagram for PORT COM;
Fig. 4 selects the window synoptic diagram for inquiry;
Fig. 5 selects the window synoptic diagram for the data extract numbering;
Fig. 6 is a progress displaying table in the data extraction procedure;
Fig. 7 is a memory clear-up password authentication interface synoptic diagram;
Fig. 8 is a data presentation window synoptic diagram;
Fig. 9 is the graphic presentation curve synoptic diagram;
Figure 10 is the report interface synoptic diagram.
Five, embodiment:
Referring to Fig. 1, the electronic boxshear apparatus of bridge surface waterproof layer is mainly used in the inter-layer shearing strength of measuring between water barrier and concrete bridge deck and the asphalt mat, be applicable to indoor or on-the-spot detection to all kinds of waterproof materials and water barrier, so that analyze different bridge floor situations, the bridge floor treatment measures, asphalt concrete construction temperature and serviceability temperature, thickness of bituminous surface, the asphalt type, factors such as water barrier type are to the rule that influences of inter-layer shearing strength, and test findings can be used for selecting waterproof material, for bridge deck water-proof design provides design parameter, on-the-spot judgement construction of waterproof layer quality.Test method is to apply shearing by cutting member gradually to the bituminous concrete test specimen, and test macro is constantly gathered power and displacement data and storage, breaks away from until bituminous concrete test specimen and water barrier, will keep maximum, force value and shift value on the test macro display.The present invention includes base 1, base 1 is the main body of instrument, and shearing force imposes on sample by base during shearing, be to guarantee the stability of instrument work, base is selected more abundant ironcasting for use, consider move, two ends are provided with hand-held hole, in order to strengthen rigidity, there is reinforcement at the edge, front and back.Base 1 is provided with worm and wormwheel 4, speed reduction unit 2 and guide bracket 15, worm and wormwheel 4 is connected with base 1 by bearing 5, casing 8, screw rod 7 and worm and wormwheel 4 are connected by acme thread, screw rod 7 right-hand members are relay sensor 9, push rod 10, catch bar 12 successively, and is connected with cutting member 16 with guide bracket 15 by catch bar 12.Cutting member 16 is by guide bracket 15 guiding, and guide bracket 15 is provided with guide pin bushing 13 and set screw 14.Screw rod 7 is provided with the feather key 6 and the key 11 of pulling back, and after a sample shearing was finished, key 11 can turn back to zero point by pulling back.Consider that from stressed and velocity of displacement selecting 1/40 worm and wormwheel, thrust bearing and pitch for use is the screw rod of 5mm.For structure is practical simple, catch bar and cutting member are all selected the cylindrical guide of sliding friction for use, because it is inconsistent to shear sample thin and thick size, so the cutting member design size is adjustable.Sensor comprises force transducer 9 and displacement transducer, and force transducer 9 is connected with single-chip microcomputer with displacement transducer.So consider the adjustable-speed when shearing, the mensuration of displacement and shearing force is selected Single-chip Controlling for use, step motor drives, incremental encoder range finding from, shear force sensor dynamometry, new technologies such as Hall switch location, realize electromechanical integration, reached the technical indicator of instrument fully.
During real work, motor 3 drives worm screw, worm and wormwheel 4, screw rod 7, force transducer 9, push rod 10, catch bar 12 successively by synchronous band, drives cutting member 16 and shears sample.Test macro is constantly gathered power and displacement data and storage by sensor.After a sample shearing is finished, can turn back to zero point by the zero-setting operation instrument.
Practical operation step of the present invention is as follows:
1. system powers on
At first carry out motor playback work after system powers on, show the shear parameters input after playback work is finished, this moment, the user can shear used numbering and speed by the code switch input.
2. shear parameters input
The user is provided with shear parameters by stirring code switch.
System's regulation: shear numbering and must be 19 to the maximum since 0, totally 20 groups.
When numbering is sheared in input, defer to the principle that increases successively from small to large.If done 3 groups of shearings, then the numbering input range that can next time shear of user is 0～3, and promptly user's former numbering (cover former data, be numbered at 00～02 o'clock) of can reforming on the one hand can be sheared (being numbered at 03 o'clock) on the one hand next time.
3. the parameter input is determined
After the parameter input is finished, press " determining " key, system at first descends, display shows " Downing ... "Automatically stop behind the decline 20mm, display shows " Press Start to Run ".
4. start and shear
Under system's ready state, by " startup " button, system begins to search for stress point, at this moment screen display " Search Strength ".
After system detects stress point, promptly begin automatically to shear, while Displacement Measurement amount and pulling force, and on screen, show in real time.
5. shear history
During shearing, maximum pulling force and corresponding displacement thereof are sheared in first behavior on the screen, and second row shows the pulling force and the displacement of current shearing, and the third line shows to be sheared the time of usefulness (second).
6. shear and finish
When the system discovery pulling force begins to descend (pulling force of current point be maximum pull 50%), stop to shear, get maximal value for shearing pulling force.In order to prevent that abnormal conditions from occurring, system has increased some preventive measure simultaneously:
After system does not find stress point all the time, and shearing runs to limit switch, stop to shear.
When system does not find the pulling force drop point all the time, and motor range stops to shear when reaching 20mm.
When system does not find the pulling force drop point all the time, and shear run to limit switch after, stop to shear, getting maximal value is shear force.
7. shearing data checks
System has power down and preserves storer, and the data of shearing all are saved.The user can be after the motor playback, and by " checking " button, the system requirements user imports the data number that will check, after input is finished, promptly show this group data, if data are more than a screen by " determining ", can carry out page turning by " affirmation " key and check that any time can be pressed " checking " once more and be returned
8. report printing
After shearing was finished, the user can be printed by mini-printer shearing the result.The user is after the motor playback, and by " checking " button, the data number that system requirements user input will be checked can print shearing data by " printing " at this moment.
9. data upload function
Boxshear apparatus is furnished with the RS232C interface, can carry out communication with the supporting upper computer software of boxshear apparatus.By upper computer software, can be with the data extract in the boxshear apparatus to computing machine and carry out various processing.
Boxshear apparatus upper computer software operation instruction
The boxshear apparatus upper computer software is the boxshear apparatus software kit, and function is to extract data from boxshear apparatus, and data are generated data, curve report printing output.Software can run under Win98, Win2000, the WinXP operating system.
Setup.exe file in the operation mounting disc, install software.From the operation " boxshear apparatus data handling system " down of windows desktop " ", " program ", " boxshear apparatus upper computer software " menu, software is carried out the back and is shown main interface after the installation.Boxshear apparatus master interface as shown in Figure 2.
Mouse moved to promptly push button function prompting on the button.
Following according to main interface menu item, each function of boxshear apparatus upper computer software is done an explanation.
1. communication port setting.
The user must guarantee that the serial ports of computers selection that is connected with boxshear apparatus is correct, otherwise communication will not contact before carrying out data communication.Under menu " setting of Xi Tongcanshuo communication port ", the user can select employed port numbers.Window as shown in Figure 3.
The parameter of boxshear apparatus and computing machine communication is as follows:
Baud rate: 2400; Check bit: do not have; Data bit: 8; Position of rest: 1
In the serial port setting window, only allow the user's modification port numbers.
2. data query.
The user can inquire about the data in the boxshear apparatus earlier before extracting data.The content of inquiry comprises:
1) effective Serial Number Range in the boxshear apparatus storer;
The information of the data of 2) appointment numbering (comprising information such as date, speed, maximum, force, the corresponding displacement of maximum, force).Window such as Fig. 4 are selected in inquiry.
The result of inquiry is presented on the status bar of main window, if specify when numbering inquiry, and when the numbering of user's input surpasses the maximal value of numbering in the boxshear apparatus storer, display alarm information.
3. data extract.
System allows the user one by one or simultaneously each numbering data extract to be come.Numbering is selected window such as Fig. 5.After the numbering that allows to select to want to extract, can be by " determining " with data extract.
In the data extraction procedure, progress displaying table such as Fig. 6.
When numbering was selected, system limited user's numbering range of choice automatically according to number value maximum in the storer
4. memory clear-up.
System's regulation: the boxshear apparatus storer can be stored 20 groups of data at most, and reference numeral is 0..19.If the user wants to delete the data in the storer, but choice menus " Tong Xuncaozuo empties storer " order.For the sake of security, system will carry out password authentication, interface such as Fig. 7 before entering " emptying storer " menu.
Initial challenge after the software installation is empty.
After carrying out " memory clear-up " order, data are with Delete All in the boxshear apparatus.
5. during the equipment school.
When the equipment time was carried out the school, the user can select " during the equipment school " order down at menu " communication operation ".
What send during the equipment school is the current time of computing machine, therefore must guarantee that computer time is correct.
6. data presentation and report printing.
The user can show the data of being extracted down at menu " data presentation ".Data presentation window such as Fig. 8.
The first half of data presentation window shows the result of these group data, and the latter half shows concrete data.
If think the video data curve, but " graphic presentation " shows curve, interface such as Fig. 9 under the choice menus " demonstration is provided with ".The first half of data presentation window shows the result of these group data, and the latter half shows concrete data and curves.
In this window, select " print data " button can generate data sheet, select " printing curve " but button formation curve form.Report interface such as Figure 10.
In form the preview window, click print button and report printing can be exported.
7. software application notice:
1) if communication contact is not gone up (the no response phenomenon occurring), should check:
(1) whether serial ports is selected correct;
(2) whether the serial ports line is correct;
(3) whether boxshear apparatus works;
(4) whether the boxshear apparatus motor is out of service;
(5) whether the boxshear apparatus printer stops to print.
Attention: communication during the boxshear apparatus motor rotation, system prompt no response.Communication must be carried out when motor is out of service.
Attention: communication when boxshear apparatus is printed, system prompt no response.Communication must be carried out when stopping to print operation.
2) data extracted of each communication all are kept in the computing machine, when extracting the data of specifying numbering, will cover the data of the same numbering of extracting last time.
The name format that extracts data preservation file is: drag+ numbers .db;
The filename form that result data is deposited is: dragpara+ numbers .db.
If the user does not want last secondary data is covered, this numbering corresponding file can be backed up.The catalogue that software is installed is the catalogue that data file is deposited.
Claims (10)
1. electronic boxshear apparatus of bridge surface waterproof layer, it is characterized in that: comprise base (1), base (1) is provided with worm and wormwheel (4), speed reduction unit (2) and guide bracket (15), worm and wormwheel (4) is connected with base (1) by bearing (5), casing (8), screw rod (7) is threaded with worm and wormwheel (4), screw rod (7) other end is connected with force transducer (9) in the sensor, and is connected with cutting member (16) with guide bracket (15) by catch bar (12).
2. the electronic boxshear apparatus of bridge surface waterproof layer according to claim 1 is characterized in that: described screw rod (7) is connected by acme thread with worm and wormwheel (4).
3. the electronic boxshear apparatus of bridge surface waterproof layer according to claim 1 and 2 is characterized in that: described sensor comprises force transducer (9) and displacement transducer, and force transducer (9) is connected with single-chip microcomputer with displacement transducer.
4. the electronic boxshear apparatus of bridge surface waterproof layer according to claim 3 is characterized in that: described screw rod (7) is provided with the zero-setting operation device.
5. the electronic boxshear apparatus of bridge surface waterproof layer according to claim 4 is characterized in that: described guide bracket (15) is provided with guide pin bushing (13) and set screw (14).
6. the electronic boxshear apparatus of bridge surface waterproof layer according to claim 5 is characterized in that: described catch bar (12) is the cylindrical guide of sliding friction with cutting member (16).
7. the electronic boxshear apparatus of bridge surface waterproof layer according to claim 6 is characterized in that: be provided with push rod (10) between described screw rod (7) and the catch bar (12).
8. the electronic boxshear apparatus of bridge surface waterproof layer according to claim 7, it is characterized in that: described boxshear apparatus is provided with limit switch.
9. the electronic boxshear apparatus of bridge surface waterproof layer according to claim 8 is characterized in that: described displacement transducer is an incremental encoder.
10. the electronic boxshear apparatus of bridge surface waterproof layer according to claim 9, it is characterized in that: described boxshear apparatus is provided with communication interface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB031144152A CN100414282C (en) | 2003-01-09 | 2003-01-09 | Bridge surface water-proofing layer electric shearing equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB031144152A CN100414282C (en) | 2003-01-09 | 2003-01-09 | Bridge surface water-proofing layer electric shearing equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1515748A CN1515748A (en) | 2004-07-28 |
| CN100414282C true CN100414282C (en) | 2008-08-27 |
Family
ID=34239346
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB031144152A Expired - Fee Related CN100414282C (en) | 2003-01-09 | 2003-01-09 | Bridge surface water-proofing layer electric shearing equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100414282C (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102901674A (en) * | 2012-09-21 | 2013-01-30 | 辽宁科技大学 | Briquette tamping test machine able to measure coking coal tamping performance |
| CN109580385B (en) * | 2018-11-16 | 2022-03-18 | 北京东方雨虹防水技术股份有限公司 | Test equipment and test method for resisting underground engineering settlement damage of waterproof layer |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4934185A (en) * | 1988-01-25 | 1990-06-19 | Mitsubishi Denki Kabushiki Kaisha | Device for measuring adhesive strength and shear strength of coated film |
| JPH03215726A (en) * | 1990-01-20 | 1991-09-20 | Nippon Denshi Kogyo Kk | Road surface frictional force detector by spindle, vertical load detector and road surface friction coefficient detector |
| CN1077027A (en) * | 1993-04-16 | 1993-10-06 | 冶金工业部钢铁研究总院 | The measuring method of material surface film and basal body binding force and device |
| JPH07120378A (en) * | 1993-10-21 | 1995-05-12 | Toyota Motor Corp | Testing method for adhesion property of film |
| CN2600485Y (en) * | 2003-01-09 | 2004-01-21 | 胡长顺 | Electric shearing instrument for water-proof layer of bridge floor |
-
2003
- 2003-01-09 CN CNB031144152A patent/CN100414282C/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4934185A (en) * | 1988-01-25 | 1990-06-19 | Mitsubishi Denki Kabushiki Kaisha | Device for measuring adhesive strength and shear strength of coated film |
| JPH03215726A (en) * | 1990-01-20 | 1991-09-20 | Nippon Denshi Kogyo Kk | Road surface frictional force detector by spindle, vertical load detector and road surface friction coefficient detector |
| CN1077027A (en) * | 1993-04-16 | 1993-10-06 | 冶金工业部钢铁研究总院 | The measuring method of material surface film and basal body binding force and device |
| JPH07120378A (en) * | 1993-10-21 | 1995-05-12 | Toyota Motor Corp | Testing method for adhesion property of film |
| CN2600485Y (en) * | 2003-01-09 | 2004-01-21 | 胡长顺 | Electric shearing instrument for water-proof layer of bridge floor |
Non-Patent Citations (4)
| Title |
|---|
| LLM 测试系统开发及在路面研究中的应用. 李杰武，胡长顺，郭黎明.西安公路交通大学学报，第18卷第3(B)期. 1998 |
| LLM 测试系统开发及在路面研究中的应用. 李杰武，胡长顺，郭黎明.西安公路交通大学学报，第18卷第3(B)期. 1998 * |
| 桥面防水材料路用性能. 裴建中，胡长顺，张占军.交通运输工程学报，第1卷第4期. 2001 |
| 桥面防水材料路用性能. 裴建中，胡长顺，张占军.交通运输工程学报，第1卷第4期. 2001 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1515748A (en) | 2004-07-28 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPS61183741A (en) | Assistance for input of command information | |
| JP6030320B2 (en) | Surface texture measuring machine | |
| US5521824A (en) | Method and apparatus for controlling an engine test apparatus using lead-lag control | |
| Liu et al. | MODULUS 6.0 for windows: User's manual | |
| CN100414282C (en) | Bridge surface water-proofing layer electric shearing equipment | |
| US5938931A (en) | Method for processing liquid chromatographic data | |
| CN104390892A (en) | Tester and method for testing soft particles in coarse aggregate | |
| CN101620053B (en) | Asphalt mixture shearing parameter determinator | |
| US5435192A (en) | Method and apparatus for controlling an engine | |
| JP2009019913A (en) | Analyzer | |
| CN100379926C (en) | Bridge surface water-proofing layer tearing equipment | |
| CN2600485Y (en) | Electric shearing instrument for water-proof layer of bridge floor | |
| JP2017157879A (en) | Construction data management system | |
| Boeniger | A comparison of surface wipe media for sampling lead on hands | |
| US20060170711A1 (en) | Input device | |
| CN102502413B (en) | Safety monitoring method for crane monitor | |
| CN2600482Y (en) | Manual instrument for detecting shear strength of water-proof layer of bridge floor | |
| EP0612987B1 (en) | Method for starting a balance and an electronic balance | |
| CN210919016U (en) | In-situ measurement system of engineering geological exploration drilling machine | |
| JP2017173083A (en) | Material testing machine | |
| JP3200786B2 (en) | Touch panel type portable terminal for work inspection and work management device | |
| JPH06176172A (en) | Structure inspecting device | |
| CN203191372U (en) | Automotive brake oil detection device with setting function | |
| CN201063013Y (en) | Device for detecting compressive performance of building thermal insulation material | |
| CN202886214U (en) | Particle bulk material shearing parameter tester |
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 | ||
| ASS | Succession or assignment of patent right |
Owner name: CCCC FIRST HIGHWAY ENGINEERING BUREAU LTD. Free format text: FORMER OWNER: HU ZHANGSHUN Effective date: 20090515 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20090515 Address after: Chaoyang District, Guanzhuang, Beijing Patentee after: CCCC First Highway Engineering Co., Ltd. Address before: Middle route of south 2nd Ring Road, Xi'an City, Shaanxi Province, Chang'an University Patentee before: Hu Changshun |
|
| 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: 20080827 Termination date: 20180109 |