CN105888776B - The engine and portable working rig of silencer, subsidiary silencer - Google Patents

The engine and portable working rig of silencer, subsidiary silencer Download PDF

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Publication number
CN105888776B
CN105888776B CN201610064561.7A CN201610064561A CN105888776B CN 105888776 B CN105888776 B CN 105888776B CN 201610064561 A CN201610064561 A CN 201610064561A CN 105888776 B CN105888776 B CN 105888776B
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China
Prior art keywords
engine
silencer
exhaust gas
subsidiary
bellying
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CN201610064561.7A
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CN105888776A (en
Inventor
野泽胜
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Yamahiko Corp
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Yamahiko Corp
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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01NGAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N1/00Silencing apparatus characterised by method of silencing
    • F01N1/08Silencing apparatus characterised by method of silencing by reducing exhaust energy by throttling or whirling
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01NGAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N13/00Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Exhaust Silencers (AREA)
  • Exhaust Gas After Treatment (AREA)
  • Processes For Solid Components From Exhaust (AREA)

Abstract

The present invention provides the engine and portable working rig of a kind of silencer, subsidiary silencer.It is an object of the invention to the side for reducing silencer to engine or working rig main body overhangs outstanding.Silencer (1) of the invention has: suppressor case (2), it is with interior sidewall surface (2A) and outer side surface (2B), the interior sidewall surface has the exhaust gas entrance (20) that can be connect with the exhaust outlet of engine, and the outer side surface has waste gas outlet (21);The inner space of suppressor case (2) is divided into the 1st room (2S1) of exhaust gas entrance (20) opening and the 2nd room (2S2) of waste gas outlet (21) opening by partition (3);Catalytic converter (4), it is installed on partition (3), and it will be connected between the 1st room (2S1) and the 2nd room (2S2), interior sidewall surface (2A) has the bellying (22) bloated relative to exhaust gas entrance (20) to engine side, and has the inner end of catalytic converter (4) in the inner containment of bellying (22).

Description

The engine and portable working rig of silencer, subsidiary silencer
Technical field
The present invention relates to the portable works of a kind of silencer, the engine of subsidiary silencer and the engine equipped with subsidiary silencer Industry machine.
Background technique
In the past, in the silencer of small engine, it is known to be formed being more compact in chest shape suppressor case The silencer of the expansive space of exhaust gas.As shown in Figure 1, the basic structure that this existing silencer J1 has is as follows: passing through Partition J3 is set in the inside of suppressor case J2, forms the 1st expansion chambers J5 with exhaust gas entrance J4 in the side of partition J3, And the 2nd expansion chambers J7 with waste gas outlet J6 is formed in the other side of partition J3, setting is coated with catalyst on partition J3 Catalytic converter J8, so as to will connection (refer to following patent documents 1) between the 1st expansion chambers J5 and the 2nd expansion chambers J7.
Existing technical literature
Patent document
Patent document 1: Japanese Unexamined Patent Publication 2000-18028 bulletin
In existing silencer J1, suppressor case J2 has on the basis of the thickness of catalytic converter J8 plus the 1st A part of obtained thickness of the thickness of a part of the thickness of expansion chambers J5 and the 2nd expansion chambers J7, by silencer J1 It is installed in the state of the exhaust outlet of engine, protrudes outward thickness T from the side Es of engine.Equipped with attached on various working rigs When engine with this silencer J1, there is that the working rig body thickness equipped with engine becomes larger or the weight of working rig main body is flat The problem of weighing apparatus property is deteriorated.
Also, in having the working rig of portable handle in working rig main body etc., silencer J1 is to working rig main body Side is prominent, thus the place around there are barrier carry out operation or working rig main body is kept in relatively narrow space and into When row operation, there are problems that good workability can not be obtained because of the prominent interference of silencer J1.
Also, in known existing silencer J1, by increasing the distance until the exhaust gas entrance J4 to catalytic converter J8, To make unburnt gas completely burned using the 1st expansion chambers J5 being heated by exhaust, and reduce one contained in exhaust gas Carbonoxide and nitrogen oxides etc., as shown in Figure 1, the position of exhaust gas entrance J4 and the position of catalytic converter J8 are staggered up and down.So And in this catalytic converter J8, it is easy to be influenced by heat caused by engine itself there are catalytic converter J8, and The catalyst being coated on catalytic converter J8 is easy the problem of deteriorating because heated.
Summary of the invention
The present invention is to cope with this problem as one of its project.That is, it is an object of the invention to by reducing silencer To the side of engine or working rig main body overhang outstanding, so that working rig main body is compact and improves weight balancing, thus The workability and improvement for improving portable working rig are provided to the durability etc. of the catalytic converter (catalyst) in silencer.
In order to realize this purpose, silencer of the invention has with flowering structure:
A kind of silencer, which is characterized in that have: suppressor case, the suppressor case have interior sidewall surface and outside Wall surface, the interior sidewall surface have the exhaust gas entrance that can be connect with the exhaust outlet of engine, and the outer side surface has waste gas outlet; The inner space of the suppressor case is divided into the Room the 1st and the exhaust gas that the exhaust gas entrance is open by partition, the partition Room 2nd of exit opening;And catalytic converter, the catalytic converter are installed on the partition, and by the Room the 1st and described the It is connected between Room 2, the interior sidewall surface has the bellying bloated relative to the exhaust gas entrance to engine side, and in the bulging At least part of catalytic converter described in the inner containment in portion.
The effect of invention
In the silencer of the invention with this feature, by configuring bellying on the upside of the cylinder cap of engine etc. Place, and at least part of the inner containment catalytic converter in bellying, so as to inhibit silencer to engine or work The side overhang outstanding of industry owner's body.As a result, working rig main body is compact and improves the weight balancing of working rig main body Property, so as to improve the workability of portable working rig.
Also, when configuring catalytic converter on the upside of cylinder cap, it can prevent catalytic converter (catalyst) due to heated Deterioration, and a part of the biggish catalytic converter of weight is contained in the inside of bellying so that catalytic converter closer to Engine side, therefore can further improve the weight balancing of the working rig main body equipped with engine.Also, by near cylinder cap It is exhausted from silencer, silencer bulk temperature can either be inhibited excessively to rise, and be able to suppress the cylinder body side of engine side Temperature rise.
Detailed description of the invention
Fig. 1 is the explanatory diagram (cross-sectional view) of the prior art.
Fig. 2 is the explanatory diagram (exploded perspective view) of silencer involved in embodiments of the present invention.
Fig. 3 is that ((a) of Fig. 3 is side view, (b) of Fig. 3 for the explanatory diagram of silencer involved in embodiments of the present invention For A-A cross-sectional view).
Fig. 4 is the solid for indicating to have the engine of the subsidiary silencer of silencer involved in embodiments of the present invention Figure.
Fig. 5 is the explanatory diagram for indicating to have the engine of the subsidiary silencer of silencer involved in embodiments of the present invention ((a) of Fig. 5 is side view, and Fig. 5 (b) is A-A cross-sectional view).
Fig. 6 is the work for indicating the engine equipped with the subsidiary silencer for having silencer involved in embodiments of the present invention The perspective view of the working rig main body of industry machine.
Fig. 7 is the hand for indicating the engine equipped with the subsidiary silencer for having silencer involved in embodiments of the present invention Mention the perspective view of an example of formula working rig.
Description of symbols
1- silencer, 2- suppressor case, 2A- interior sidewall surface, 2A1- inner projection, 2B- outer side surface, the inside point 2X- Cut body, dividing body on the outside of 2Y-, 2X1,2Y1- outer peripheral edge portion, the Room the 1st 2S1-, the Room the 2nd 2S2-, 20- exhaust gas entrance, 21- exhaust gas goes out Mouth, 22- bellying, 3- partition, 3A- outer peripheral edge portion, 3B- recess portion, 4- catalytic converter, 5- emission direction limiting unit, 10- draw It holds up, 11- cylinder body, 11A- cylinder cap, 12- spark plug, 13- piston, 14- connecting rod, 15- crankshaft, 16- crank chamber, 17- flywheel, 18- Clutch, the portable working rig of 100- (chain saw), 101- working rig main body, 101A- upper handle, 101B- side handle, 102- Guide rod, 103- saw chain, 104- brake bar (handrail), 105- cover.
Specific embodiment
Hereinafter, with reference to attached drawing, embodiments of the present invention will be described.Fig. 2 and Fig. 3 indicates embodiments of the present invention Related silencer.Silencer 1 has suppressor case 2, partition 3 and catalytic converter 4.Suppressor case 2 has inside Wall surface 2A and outer side surface 2B, the interior sidewall surface have the exhaust gas entrance 20 that can be connect with the exhaust outlet of engine (not shown), The outer side surface has waste gas outlet 21.Here, inside refers to and is equipped with the facing side of the engine of silencer 1, outside Side refers to and external facing side.
Partition 3 is provided in suppressor case 2, and the inner space of suppressor case 2 is divided into exhaust gas entrance 20 and is open The 1st Room 2S1 and waste gas outlet 21 be open the 2nd Room 2S2.In illustrated example, suppressor case 2 includes having interior sidewall surface 2A Inside dividing body 2X is clamped in inside segmentation with the outside dividing body 2Y of outer side surface 2B, the outer peripheral edge portion 3A of partition 3 Between the outer peripheral edge portion 2Y1 of the outer peripheral edge portion 2X1 and outside dividing body 2Y of body 2X.
Catalytic converter 4 is installed in a manner of through partition 3, to be connected between the 1st Room 2S1 and the 2nd Room 2S2.It should Catalytic converter 4 has known structure, such as in the inside of the stainless steel rounding cylinder setting stainless steel of honeycombed Wall, and the structure of upper coating catalyst for purifying exhaust herein.The catalytic converter 4 is the group of commonly known as catalyst Part.
In the interior sidewall surface 2A of suppressor case 2, it is provided with exhaust gas entrance 20 on the flat face facing with engine, The bellying 22 bloated relative to the plane for being formed with the exhaust gas entrance 20 to engine side is provided on interior sidewall surface 2A.Pass through The inner space of bellying 22, so that the 1st Room 2S1 that exhaust gas entrance 20 is open is locally prominent towards engine side, and inside it Accommodate at least part of catalytic converter 4.In illustrated example, the inner end of catalytic converter 4 is contained in the interior of bellying 22 Portion.
This silencer 1 is substantially such: will enter after the discharge of the exhaust outlet of engine by exhaust gas entrance 20 Exhaust gas in suppressor case 2 first in the 1st Room 2S1 intramedullary expansion, and is transferred to the 2nd Room 2S2 simultaneously by catalytic converter 4 It expands again, later from waste gas outlet 21 to outside drain.It is carried out and flowing through catalytic converter 4 to the net of exhaust gas as a result, Change, and expanded step by step by exhaust gas from the 1st Room 2S1 to the 2nd Room 2S2 is mobile, to reduce exhaust gas temperature and eliminate the noise.
Moreover, passing through what is bloated relative to exhaust gas entrance 20 to engine side in interior sidewall surface 2A setting in the silencer 1 Bellying 22, and the inner end of the inner containment catalytic converter 4 in bellying 22, thus in the bellying bloated to engine side Space inside silencer 1 needed for ensuring the caliper portion for accommodating catalytic converter 4 in 22.As a result, without making to eliminate the noise Device 1 protrudes outward, and silencer 1 can be installed on engine.At this point, the configuration as the bellying 22 bloated to engine side Space, can using the bumps of engine side, engine cylinder cap above the dead angles such as white space, thereby, it is possible to realize to drawing Hold up the lesser silencer 1 of side overhang outstanding.
Here, exhaust gas entrance 20 and bellying 22 about the interior sidewall surface 2A for being set to silencer 1, it is preferred that will The longitudinal direction one end of interior sidewall surface 2A is arranged in one of them, and another one is arranged in the longitudinal direction of interior sidewall surface 2A Another side etc. configures exhaust gas entrance 20 and bellying 22 across compartment of terrain.If across compartment of terrain configuration exhaust gas entrance 20 with Bellying 22, the then exhaust gas for being able to extend the 1st Room 2S1 being flowed into suppressor case 2 from exhaust gas entrance 20 reach bellying Distance until the inner end of catalytic converter 4 in 22.Unburnt gas is and the 1st Room 2S1 being heated by exhaust as a result, Completely burned, and the temperature of exhaust gas declines before reaching catalytic converter 4, therefore can suitably maintain catalytic converter 4 purifying property.
In the interior sidewall surface 2A of silencer 1, the inner projection in the 1st stage is provided with from exhaust gas entrance 20 to bellying 22 2A1, bellying 22 of continuously ining succession since then.As a result, from useless in the 1st Room 2S1 that exhaust gas entrance 20 is flowed into suppressor case 2 Gas is flowed into accommodates the interior of catalytic converter 4 later originally in the inner projection 2A1 expansion being located near exhaust gas entrance 20 In relatively narrow space in the bellying 22 of end.
The exhaust gas for reaching the space in the bellying 22 in the 1st Room 2S1 is flowed into exhaust gas from the inner end side of catalytic converter 4 Clarifier 4, and be flowed into the 2nd Room 2S2 being separated by partition 3.Here, since the outer end of catalytic converter 4 is installed on Partition 3, thus it is seldom to the 2nd Room side 2S2 part outstanding in catalytic converter 4.Thereby, it is possible to make partition 3 and lateral wall Face 2B is close to each other, and can reduce the overhang that silencer 1 protrudes outward.At this point, in order to substantially ensure the 2nd Room 2S2, In The position on the outer end periphery in catalytic converter 4 of partition 3 is arranged to the 1st Room side 2S1 recess portion 3B outstanding, to ensure The required volume of 2 Room 2S2.
If being flowed into the exhaust gas in suppressor case 2 from the 1st from exhaust gas entrance 20 using the silencer 1 of this structure Room 2S1 pass through catalytic converter 4, it is externally discharged from waste gas outlet 21 via the 2nd Room 2S2 later, during this period, repeatedly into Row expansion and contraction, therefore sufficient cooling and noise elimination effect can be obtained.
The direction of the restricted exhaust gas discharged from waste gas outlet 21 is installed around the waste gas outlet 21 of outer side wall surface 2B Emission direction limiting unit 5.As shown, emission direction limiting unit 5 covers the face side of waste gas outlet 21, and along outside The direction in the face of wall surface 2B is open.In this way, which can be appropriately set at the emission direction of exhaust gas does not influence working rig The direction of operation etc..
Fig. 4 and Fig. 5 indicates the engine 10 for being equipped with the subsidiary silencer of above-mentioned silencer 1.Illustration engine 10 is loaded on hand The small engine on formula working rig etc. is proposed, to have cylinder body 11, piston 13, connecting rod 14, crankshaft 15, crank chamber 16, installation In the simple engine of the spark plug 12 of cylinder cap 11A and the flywheel 17 that is installed on crankshaft 15 etc..
Here, the exhaust gas entrance 20 of silencer 1 is connected with the exhaust outlet of engine 10, silencer 1 along engine 10 cylinder Body 11 and be equipped with.Moreover, the bellying 22 of silencer 1 configures the position upper in the cylinder cap 11A than engine 10.Due in cylinder The upside of 11A is covered, the central part of cylinder cap 11A is equipped with spark plug 12, therefore becomes white space around spark plug 12.Pass through Using the white space, silencer 1 spatially can be effectively configured to engine side bellying 22 outstanding.
If so engine 10 install silencer 1, then cylinder cap 11A upside configuration be contained in bellying 22 exhaust gas it is net Change device 4, and a part of the biggish catalytic converter 4 of weight is received into the inside of bellying 22, so that catalytic converter is more Close to 10 side of engine, therefore it can further improve the weight balancing of engine 10.Also, from silencer 1 near cylinder cap 11A It is exhausted, inhibits 1 bulk temperature of silencer excessively to rise, and be able to suppress in the temperature of 11 side of cylinder body of 10 side of engine It rises.
In this way, by the way that silencer 1 to be mounted on engine 10, it can be by silencer 1 from the cylinder body 11 of engine 10 to side Side is not equipped in situation outstanding largely.If also, in the bellying of the upside of cylinder cap 11A configuration silencer 1 22, then the cooling air cooling that the catalytic converter 4 in silencer 1 is passed through around cylinder cap 11A, therefore waste gas purification can be prevented Device 4 is deteriorated because heated.
Fig. 6 indicates the working rig main body of the working rig of the engine 10 equipped with subsidiary above-mentioned silencer 1.Working rig main body 101 Have portable upper handle 101A and side handle 101B.The engine 10 filled laterally setting, is equipped on crankshaft 15 Clutch 18.According to this working rig main body 101, it is prominent to the side of working rig main body 101 to be able to suppress silencer 1, therefore The weight balancing of the working rig main body 101 of the state of upper handle 101A can be improved, and can be improved workability.Also, Enable to the width of working rig main body 101 compact, so even narrow place or around have an operating environment of barrier under Operation can be carried out cosily.
Chain saw is shown as the hand equipped with the engine 10 with silencer 1 involved in embodiments of the present invention in Fig. 7 Mention the example of formula working rig 100.In the portable working rig (chain saw) 100, it is equipped with and leads in above-mentioned working rig main body 101 Bar 102 and saw chain 103.Also, brake bar (handrail) 104 is installed in working rig main body 101,1 quilt of engine 10 and silencer Cover 105 covers.According to this portable working rig (chain saw) 100, by making the width of working rig main body 101 compact, because This cosily can carry out beta pruning operation in the intensive place of trees and carry out logging operation etc. in the lesser place of working space.
As described above, by using silencer 1 involved in embodiments of the present invention, silencer 1 can either be reduced To the side of engine 10 or working rig main body 101 overhang outstanding, and working rig main body 101 can be made compact and improved portable The workability of formula working rig 100.Also, by the upside of the cylinder cap 11A of engine 10 configure silencer 1 catalytic converter 4, from And it can prevent catalytic converter (catalyst) 4 from deteriorating because heated.
More than, embodiments of the present invention are had been described in detail with reference to attached drawing, but specific structure is not limited to these implementations Mode, the design alteration etc. carried out without departing from the scope of spirit of the present invention are also contained in the present invention.Also, above-mentioned each reality As long as it is upper without contradiction or problem in its purpose and structure etc. to apply mode, group can be carried out by converting mutual technology It closes.

Claims (8)

1. a kind of engine of subsidiary silencer, is equipped with silencer, which is characterized in that
The silencer has:
Suppressor case, the suppressor case have interior sidewall surface and outer side surface, and the interior sidewall surface has can be with engine The exhaust gas entrance of exhaust outlet connection, the outer side surface have waste gas outlet;
Partition, the partition by the inner space of the suppressor case be divided into Room the 1st that the exhaust gas entrance is open with it is described Room 2nd of waste gas outlet opening;And
Catalytic converter, which is installed on the partition, and will be connected between the Room the 1st and the Room the 2nd,
The interior sidewall surface has the bellying bloated relative to the exhaust gas entrance to engine side, and in the inside of the bellying At least part of the catalytic converter is accommodated,
The bellying is configured at the position more upper than the cylinder cap of engine.
2. the engine of subsidiary silencer according to claim 1, which is characterized in that
The inner end of the catalytic converter is contained in the inside of the bellying.
3. the engine of subsidiary silencer according to claim 1, which is characterized in that
The bellying is configured separated by a distance with the exhaust gas entrance.
4. the engine of subsidiary silencer according to claim 2, which is characterized in that
The bellying is configured separated by a distance with the exhaust gas entrance.
5. the engine of subsidiary silencer according to any one of claim 1 to 4, which is characterized in that
The outer end of the catalytic converter is mounted on the partition.
6. the engine of subsidiary silencer according to any one of claim 1 to 4, which is characterized in that
The suppressor case includes having the inside dividing body of the interior sidewall surface and the outside point with the outer side surface Body is cut, the outer peripheral edge portion of the partition is clamped in the outer peripheral edge portion of the inside dividing body and the periphery of the outside dividing body Between edge.
7. the engine of subsidiary silencer according to claim 5, which is characterized in that
The suppressor case includes having the inside dividing body of the interior sidewall surface and the outside point with the outer side surface Body is cut, the outer peripheral edge portion of the partition is clamped in the outer peripheral edge portion of the inside dividing body and the periphery of the outside dividing body Between edge.
8. a kind of portable working rig, which is characterized in that
The portable work tool is equipped with subsidiary noise elimination described in claim 1 for working rig main body, the working rig main body The engine of device,
The silencer is configured in the side of the working rig main body.
CN201610064561.7A 2015-02-13 2016-01-29 The engine and portable working rig of silencer, subsidiary silencer Active CN105888776B (en)

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JP2015026915A JP6478689B2 (en) 2015-02-13 2015-02-13 Engine with muffler, hand-held work machine
JP2015-026915 2015-02-13

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CN105888776A CN105888776A (en) 2016-08-24
CN105888776B true CN105888776B (en) 2019-11-05

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Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2018204496A (en) 2017-06-01 2018-12-27 株式会社やまびこ Engine work machine

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0489819U (en) * 1990-12-18 1992-08-05
WO2012176940A1 (en) * 2011-06-24 2012-12-27 Hitachi Koki Co., Ltd. Engine working machine
JP2013213414A (en) * 2012-03-31 2013-10-17 Hitachi Koki Co Ltd Engine work machine
CN104047685A (en) * 2013-03-11 2014-09-17 本田技研工业株式会社 Muffler equipped with catalytic converter

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6236944B2 (en) * 2012-11-10 2017-11-29 日立工機株式会社 Muffler and engine working machine
JP6162541B2 (en) * 2013-08-22 2017-07-12 株式会社Subaru Muffler

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0489819U (en) * 1990-12-18 1992-08-05
WO2012176940A1 (en) * 2011-06-24 2012-12-27 Hitachi Koki Co., Ltd. Engine working machine
JP2013213414A (en) * 2012-03-31 2013-10-17 Hitachi Koki Co Ltd Engine work machine
CN104047685A (en) * 2013-03-11 2014-09-17 本田技研工业株式会社 Muffler equipped with catalytic converter

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JP2016148318A (en) 2016-08-18
CN105888776A (en) 2016-08-24

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