CN106103363B - Glass article manufacturing device and glass manufacturing method - Google Patents
Glass article manufacturing device and glass manufacturing method Download PDFInfo
- Publication number
- CN106103363B CN106103363B CN201580013117.6A CN201580013117A CN106103363B CN 106103363 B CN106103363 B CN 106103363B CN 201580013117 A CN201580013117 A CN 201580013117A CN 106103363 B CN106103363 B CN 106103363B
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- CN
- China
- Prior art keywords
- molten glass
- conveying pipe
- reinforcing member
- glass conveying
- outer peripheral
- 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.)
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Classifications
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B5/00—Melting in furnaces; Furnaces so far as specially adapted for glass manufacture
- C03B5/16—Special features of the melting process; Auxiliary means specially adapted for glass-melting furnaces
- C03B5/42—Details of construction of furnace walls, e.g. to prevent corrosion; Use of materials for furnace walls
- C03B5/43—Use of materials for furnace walls, e.g. fire-bricks
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B7/00—Distributors for the molten glass; Means for taking-off charges of molten glass; Producing the gob, e.g. controlling the gob shape, weight or delivery tact
- C03B7/02—Forehearths, i.e. feeder channels
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D3/00—Charging; Discharging; Manipulation of charge
- F27D2003/0034—Means for moving, conveying, transporting the charge in the furnace or in the charging facilities
- F27D2003/0054—Means to move molten metal, e.g. electromagnetic pump
Abstract
A glass article manufacturing device (1) is provided with: a molten glass transport pipe (13) made of a noble metal, which circulates molten glass (G) inside in a horizontal posture; and a reinforcing member (15) which is made of a non-noble metal and is attached to only the upper region of the outer peripheral surface (13a) of the molten glass conveying pipe (13) along the circumferential direction Y of the molten glass conveying pipe (13), independently of the molten glass conveying pipe (13).
Description
Technical Field
The present invention relates to an improvement in a glass article manufacturing apparatus including a molten glass conveying pipe made of a noble metal for circulating molten glass in a lateral posture.
Background
In general, in the case of an apparatus for manufacturing a glass article, for example, a glass article such as a sheet glass is continuously molded, a glass raw material is heated in a glass melting chamber and melted into a molten glass, and then the molten glass is continuously supplied to a molding apparatus (a molded article) through various steps such as a fining step and a stirring step. At this time, the molten glass melted in the glass melting chamber is transferred to the molding device by flowing through the inside of the molten glass transfer pipe (see, for example, patent document 1).
Prior art documents
Patent document
Patent document 1: japanese patent laid-open publication No. 2007-145668
However, the molten glass conveying pipe is very expensive because it is made of a noble metal such as platinum or a platinum alloy. Therefore, in order to reduce the amount of noble metal used, the thickness of the molten glass carrying pipe is generally formed as thin as possible.
However, since the molten glass flowing through the molten glass conveying pipe is at a very high temperature, the precious metal forming the molten glass conveying pipe may be oxidized and its strength may be lowered with the continuous use. Therefore, in the portion of the molten glass conveying pipe disposed in the lateral posture, there is a problem that the upper portion of the molten glass conveying pipe is deformed so as to be bent downward by its own weight. In this case, the flow path of the molten glass formed inside the molten glass conveying pipe is undesirably narrowed, which causes disturbance in the flow of the molten glass. As a result, bubbling in the molten glass or the like adversely affects the quality of the final glass article.
Here, it is also conceivable to increase the strength of the molten glass conveying pipe by increasing the amount of noble metal used, but as described above, noble metals such as platinum are expensive, and the facility cost greatly increases, and therefore, this cannot be a practical measure.
Disclosure of Invention
Problems to be solved by the invention
In view of the above circumstances, an object of the present invention is to reliably reinforce a molten glass conveying pipe without causing an increase in facility cost.
Means for solving the problems
In the present invention, which has been made to solve the above-mentioned problems, the apparatus for producing a glass article includes a precious metal molten glass transport pipe for circulating molten glass in a lateral posture, and a non-precious metal reinforcing member is attached only to an upper region of an outer peripheral surface of the molten glass transport pipe along a circumferential direction of the molten glass transport pipe.
With this configuration, the upper region of the outer peripheral surface of the precious metal molten glass conveying pipe is reinforced by the non-precious metal reinforcing member independent of the molten glass conveying pipe. Since the reinforcing member is attached along the circumferential direction of the molten glass conveying pipe, the shape of the upper region of the molten glass conveying pipe can be maintained by the reinforcing member. Further, since the molten glass delivery pipe made of noble metal is reinforced by the reinforcing member made of non-noble metal, the amount of noble metal used can be suppressed to the minimum. Further, since the non-noble metal reinforcing member is provided only in the upper region of the molten glass conveying pipe, the amount of non-noble metal material used for forming the reinforcing member can be reduced as compared with the case where the reinforcing member is provided over the entire circumference of the molten glass conveying pipe. This can reinforce the molten glass conveying pipe and reliably reduce the facility cost.
In the above-described configuration, the reinforcing member is preferably attached to a region of the outer peripheral surface of the molten glass conveying pipe, the region being equal to or less than half of the circumference.
In this way, the reinforcing member can be attached to the outer peripheral surface of the molten glass conveying pipe from the side of the molten glass conveying pipe (for example, in the radial direction perpendicular to the pipe axial direction) without inserting the reinforcing member from the axial direction of the molten glass conveying pipe. Therefore, the mounting operation of the reinforcing member becomes easy.
In the above-described configuration, it is preferable that both end portions of the reinforcing member in the circumferential direction of the molten glass transport pipe are supported from below by a refractory disposed around the molten glass transport pipe.
Thus, the reinforcing member maintains an arch-like posture in a state of being bridged between the refractories. Therefore, the upper region of the molten glass conveying pipe is supported in a state of being suspended from the reinforcing member. This can more reliably prevent the upper region of the molten glass conveying pipe from deforming due to its own weight.
In the above-described configuration, it is preferable that a plurality of engaging portions including an upper engaging piece that engages with an outer peripheral surface of the reinforcing member are integrally provided along a circumferential direction on an outer peripheral surface of the molten glass conveying pipe.
In this way, the upper engaging piece of the engaging portion can prevent the reinforcing member from coming off radially outward from the outer peripheral surface of the molten glass conveying pipe.
In the above-described configuration, it is preferable that the engaging portion includes a pair of side engaging pieces that engage with both side surfaces of the reinforcing member in the pipe axis direction of the molten glass conveying pipe.
In this way, the pair of side engaging pieces of the engaging portion can prevent the reinforcing member from coming off in the pipe axial direction of the molten glass conveying pipe.
In the above-described configuration, it is preferable that one of the pair of side engaging pieces is continuous with an outer peripheral surface of the molten glass conveying pipe, and the other side engaging piece is provided so as to be foldable with respect to the upper engaging piece.
In this way, after the reinforcing member is positioned by the one side engaging piece and the upper engaging piece, the reinforcing member can be easily fixed to the outer peripheral surface of the molten glass conveying pipe by bending the other side engaging piece so as to engage with the side surface of the reinforcing member.
In the above-described structure, preferably, the reinforcing member is formed of fused cast bricks.
In this way, the heat resistance and strength of the reinforcing member can be easily improved while suppressing an increase in equipment cost.
Effects of the invention
As described above, according to the present invention, since the molten glass transport pipe made of noble metal is reinforced by the reinforcing member made of non-noble metal, the molten glass transport pipe can be reliably reinforced without causing an increase in facility cost.
Drawings
Fig. 1 is a diagram showing a configuration of an apparatus for manufacturing a glass article according to an embodiment of the present invention.
FIG. 2 is a perspective view showing the molten glass conveying pipe of FIG. 1.
FIG. 3 is a sectional view of the molten glass conveying pipe of FIG. 1, the sectional view being perpendicular to the pipe axial direction.
Fig. 4 is an enlarged view of the Z region shown in fig. 3.
Fig. 5 is a sectional view showing the pipe axial direction of the engagement portion of fig. 1.
FIG. 6A is a view for explaining a method of attaching a reinforcing member to the outer peripheral surface of a molten glass conveying pipe, and shows an initial state of the attaching operation.
FIG. 6B is a view for explaining a method of attaching the reinforcing member to the outer peripheral surface of the molten glass conveying pipe, and shows a state in the middle stage of the attaching operation.
FIG. 6C is a view for explaining a method of attaching a reinforcing member to the outer peripheral surface of the molten glass conveying pipe, and is a view showing a state at the end of the attaching operation.
Fig. 7 is a sectional view in the pipe axis direction showing a modification of the engaging portion.
FIG. 8 is a sectional view orthogonal to the tube axial direction showing a modification of the molten glass conveying tube.
Detailed Description
Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
As shown in fig. 1, the glass article manufacturing apparatus 1 of the present embodiment is an apparatus for manufacturing a plate glass as a glass article from a molten glass G. In the manufacturing apparatus 1, a stirring vessel 4 is communicated with a downstream side of a melting chamber 2 disposed at an upstream end via a fining chamber 3, and the stirring vessel 4 is communicated with a crucible portion 5 serving as a volume portion for mainly adjusting the viscosity of the molten glass G at the downstream side thereof. A flow passage area reducing portion 6 having a diameter gradually reduced as it moves downward is formed in a lower portion of the crucible portion 5, a small diameter pipe 7 is connected to a downstream end of the flow passage area reducing portion 6, and a large diameter pipe 9 having a curved portion 8 in the middle is connected to a downstream side of the small diameter pipe 7. Then, molten glass G is supplied from the downstream end 10 of the large diameter pipe 9 to the forming body 11, and the molten glass G is formed into a plate-like shape in the forming body 11.
In this embodiment, the cross section of the forming body 11 is substantially wedge-shaped, and is configured to form the molten glass G into a plate-like form as described below for performing the overflow down-draw method. First, molten glass G is continuously supplied to an overflow trough (not shown) formed in the upper portion of forming body 11, and the molten glass G overflows from the overflow trough and flows down along the side wall surfaces on both sides of forming body 11. Then, the molten glass G flowing down is fused at the lower top of the formed body 11 to form a plate-like shape. Then, at the stage of solidifying the sheet-shaped glass molded product of this form, the sheet-shaped glass molded product is nipped by a pulling roll and pulled downward, thereby obtaining a sheet glass as a final product. The plate glass thus produced is used for a substrate or a protective cover of a flat panel display such as a liquid crystal display or an organic EL display having a thickness of 0.1 to 1.0mm, an organic EL lighting, a solar cell, or the like.
The melting chamber 2 and the fining chamber 3, the fining chamber 3 and the stirring vessel 4, and the stirring vessel 4 and the crucible portion 5 are connected by molten glass transfer pipes 12, 13, and 14 arranged in a horizontal posture. The lateral posture includes, for example, a posture inclined within ± 50 ° with respect to the horizontal plane.
Since these molten glass conveying pipes 12, 13, and 14 have substantially the same configuration, a specific configuration will be described below by taking the molten glass conveying pipe 13 connecting the melting chamber 2 and the fining chamber 3 as an example.
As shown in FIG. 2, the molten glass conveying pipe 13 is a cylindrical pipe made of platinum or a platinum alloy. A plurality of semicircular reinforcing members 15 formed independently of the molten glass conveying pipe 13 are attached to the upper region of the outer peripheral surface 13a of the molten glass conveying pipe 13 at intervals along the pipe axial direction X. The reinforcing members 15 are continuous in the circumferential direction Y of the molten glass conveying pipe 13 in the upper region of the outer peripheral surface 13a of the molten glass conveying pipe 13.
Each reinforcing member 15 is formed of fused bricks. As the fused cast bricks, Zr having a high melting point and a high strength is preferably used2O-series fused bricks.
The reinforcing members 15 are attached to the outer peripheral surface 13a of the molten glass conveying pipe 13 via engaging portions 16 integrally provided on the outer peripheral surface 13a of the molten glass conveying pipe 13. The plurality of engaging portions 16 are provided at intervals in the circumferential direction of each reinforcing member 15.
As shown in fig. 3, refractories 17 and 18 made of baked bricks, fused cast bricks, or the like are disposed around the molten glass conveying pipe 13. More specifically, cylindrical recessed portions 17a and 18a are formed in the refractory 17 surrounding the upper region of the molten glass conveying pipe 13 and the refractory 18 surrounding the lower region of the molten glass conveying pipe 13, respectively, and the molten glass conveying pipe 13 is accommodated in a space between the recessed portions 17a and 18 a.
As shown in fig. 4, the circumferential both end surfaces 15a of each reinforcing member 15 are formed in a substantially horizontal plane (for example, an inclination angle with respect to the horizontal plane is in the range of ± 30 °) and have a receiving region L overlapping with the refractory 18 surrounding the lower half of the molten glass conveying pipe 13. Therefore, both circumferential end surfaces 15a of each reinforcing member 15 are supported from below by the portion of the refractory 18 corresponding to the bearing region L. That is, each reinforcing member 15 is bridged between the refractories 18 and held in an arch-like posture. Thereby, the upper region of the molten glass conveying pipe 13 is supported in a state of being suspended from the reinforcing member 15 maintaining the arch-like posture.
In this way, the upper region of the molten glass conveying pipe 13 can be prevented from being deformed so as to be bent downward by its own weight. Further, since the reinforcing member 15 is formed of fused cast bricks which are non-noble metals, it is very inexpensive as compared with the case where the molten glass conveying pipe 13 is reinforced with noble metals. Further, since the reinforcing member 15 is provided only in the upper region of the molten glass conveying pipe 13, the waste of the non-noble metal fused cast bricks can be reduced as compared with the case where the reinforcing member is provided over the entire circumference of the molten glass conveying pipe 13. This can reinforce the molten glass conveying pipe 13 while reducing the facility cost, and suppress deformation of the molten glass conveying pipe 13 due to aging.
In this embodiment, the upper region of the molten glass conveying pipe 13 reinforced by the reinforcing member 15 is a semicircular arc region having a central angle α of 180 °.
As shown in fig. 5, the engaging portion 16 includes: a pair of side engaging pieces 16a, 16b that engage with both side surfaces 15b, 15c of the reinforcing member 15 that face each other in the tube axis direction; and an upper engaging piece 16c that engages with the outer peripheral surface 15d of the reinforcing member 15. The engaging portion 16 is formed of the same noble metal as the molten glass conveying pipe 13.
Specifically, the first side engaging piece 16a is integrated with the outer peripheral surface 13a of the molten glass conveying pipe 13 by welding or the like. The second side engaging piece 16b is foldable with respect to the upper engaging piece 16c, and is continuous with the one side engaging piece 16a via the upper engaging piece 16 c.
When the reinforcing member 15 is attached to the outer peripheral surface 13a of the molten glass conveying pipe 13, first, as shown in fig. 6A, the reinforcing member 15 is fitted into the outer peripheral surface 13a of the molten glass conveying pipe 13 from the direction of arrow a in a state where the second side engaging piece 16b is not bent and extended. Next, as shown in fig. 6B, the reinforcing member is moved in the arrow B direction, and the side surface 15B of the reinforcing member 15 is brought into contact with the first side engaging piece 16 a. Then, as shown in fig. 6C, the second side engaging piece 16b is bent in the arrow C direction and brought into contact with the side surface 15C of the reinforcing member 15. Thereby, a partial region in the circumferential direction of the reinforcing member 15 corresponding to the engaging portion 16 is enclosed by the engaging portion 16. As a result, the movement of the molten glass conveying pipe 13 in the pipe axial direction is restricted by the first side engaging piece 16a and the second side engaging piece 16b, and the movement of the molten glass conveying pipe 13 in the radial direction is restricted by the upper engaging piece 16c, so that the molten glass conveying pipe 13 is reliably attached to the outer peripheral surface 13a of the molten glass conveying pipe 13 by the engaging portion 16. Although the reinforcing member 15 and the engaging portion 16 are shown as being in close contact with each other, a gap may be provided between the reinforcing member 15 and the engaging portion 16.
The present invention is not limited to the above-described embodiments, and can be implemented in various ways.
In the above-described embodiment, the case where the engaging portion 16 includes the first side engaging piece 16a, the second side engaging piece 16b, and the upper engaging piece 16c has been described, but as shown in fig. 7, the second side engaging piece 16b may be omitted and the engaging portion 16 may include only the first side engaging piece 16a and the upper engaging piece 16 c.
In the above-described embodiment, the case where the reinforcing member 15 is provided on the upper half portion of the outer peripheral surface of the molten glass conveying pipe 13 has been described, but as shown in fig. 8, the upper region of the molten glass conveying pipe 13 reinforced by the reinforcing member 15 may be an arc-shaped region having a central angle α of less than 180 °. In this case, too, both circumferential end surfaces 15a of the reinforcing member 15 are preferably substantially horizontal surfaces. The central angle α of the upper region of the molten glass conveying pipe 13 reinforced by the reinforcing member 15 may be in the range of 120 to 180 °, and preferably 160 to 180 °.
In the above-described embodiment, the case where the circumferential both end surfaces 15a of the reinforcing member 15 are supported by the refractory 18 from below has been described, but the circumferential both end surfaces 15a of the reinforcing member 15 may not be supported by the refractory 18 from below. In this case, since the rigidity of the molten glass conveying pipe 13 is enhanced by the reinforcing member 15, a reinforcing effect can be obtained.
1 apparatus for manufacturing glass article (plate glass)
2 melting chamber
3 clarification chamber
4 agitation tank
5 Container part
11 shaped body
12. 13, 14 molten glass conveying pipe
15 reinforcing member
16 engaging part
16a first side engaging piece
16b second side engaging piece
16c upper engaging piece
17. 18 refractory
G molten glass
Claims (8)
1. An apparatus for manufacturing a glass article, comprising: a molten glass transport pipe made of a noble metal for circulating molten glass in a horizontal posture; and a first refractory disposed so as to surround an upper region of the molten glass conveying pipe and a second refractory disposed so as to surround a lower region of the molten glass conveying pipe,
a plurality of engaging portions are integrally provided in an upper region of an outer peripheral surface of the molten glass conveying pipe along a circumferential direction of the molten glass conveying pipe,
a non-noble metal reinforcing member is attached only to an upper region of an outer peripheral surface of the molten glass conveying pipe in a circumferential direction of the molten glass conveying pipe by engaging with each of the engaging portions,
the reinforcing member is disposed between an upper region of an outer peripheral surface of the molten glass conveying pipe and the first refractory without being exposed to the outside of the first refractory and the second refractory.
2. The glass article manufacturing apparatus according to claim 1,
the reinforcing member is attached to a region of the outer peripheral surface of the molten glass conveying pipe that is not more than half the circumference.
3. The glass article manufacturing apparatus according to claim 1 or 2,
both end portions of the reinforcing member in the circumferential direction of the molten glass conveying pipe are supported from below by the second refractory disposed around the molten glass conveying pipe.
4. The glass article manufacturing apparatus according to claim 1 or 2,
the engaging portion includes an upper engaging piece that engages with an outer peripheral surface of the reinforcing member.
5. The glass article manufacturing apparatus according to claim 4,
the engaging portion includes a pair of side engaging pieces that engage with both side surfaces of the reinforcing member in the pipe axis direction of the molten glass conveying pipe.
6. The glass article manufacturing apparatus according to claim 5,
one of the pair of side engaging pieces is continuous with the outer peripheral surface of the molten glass conveying pipe, and the other side engaging piece is provided so as to be foldable with respect to the upper engaging piece.
7. The glass article manufacturing apparatus according to claim 1 or 2,
the reinforcing member is formed of fused bricks.
8. A glass production method for circulating molten glass in an interior of a molten glass transport pipe made of a noble metal while a first refractory is disposed so as to surround an upper region of the molten glass transport pipe in a horizontal posture and a second refractory is disposed so as to surround a lower region of the molten glass transport pipe,
a plurality of engaging portions are integrally provided in an upper region of an outer peripheral surface of the molten glass conveying pipe along a circumferential direction of the molten glass conveying pipe,
a non-noble metal reinforcing member is attached only to an upper region of an outer peripheral surface of the molten glass conveying pipe in a circumferential direction of the molten glass conveying pipe by engaging with each of the engaging portions,
the reinforcing member is disposed between an upper region of an outer peripheral surface of the molten glass conveying pipe and the first refractory without being exposed to the outside of the first refractory and the second refractory.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2014050287A JP6281747B2 (en) | 2014-03-13 | 2014-03-13 | Glass article manufacturing apparatus and manufacturing method thereof |
| JP2014-050287 | 2014-03-13 | ||
| PCT/JP2015/055866 WO2015137163A1 (en) | 2014-03-13 | 2015-02-27 | Glass article manufacturing device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106103363A CN106103363A (en) | 2016-11-09 |
| CN106103363B true CN106103363B (en) | 2020-01-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201580013117.6A Active CN106103363B (en) | 2014-03-13 | 2015-02-27 | Glass article manufacturing device and glass manufacturing method |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP6281747B2 (en) |
| CN (1) | CN106103363B (en) |
| WO (1) | WO2015137163A1 (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6739965B2 (en) * | 2016-03-31 | 2020-08-12 | ＡｖａｎＳｔｒａｔｅ株式会社 | Glass plate manufacturing method |
| KR102522821B1 (en) * | 2017-09-04 | 2023-04-18 | 니폰 덴키 가라스 가부시키가이샤 | Method and apparatus for manufacturing glass articles |
| WO2019146446A1 (en) * | 2018-01-29 | 2019-08-01 | 日本電気硝子株式会社 | Method and apparatus for manufacturing glass article |
| JP7223329B2 (en) * | 2019-06-17 | 2023-02-16 | 日本電気硝子株式会社 | GLASS TRANSFER DEVICE AND GLASS PRODUCT MANUFACTURING METHOD |
| JP7382021B2 (en) * | 2019-10-18 | 2023-11-16 | 日本電気硝子株式会社 | Glass article manufacturing equipment and its manufacturing method |
| CN113387539A (en) * | 2021-04-30 | 2021-09-14 | 彩虹显示器件股份有限公司 | Reinforcing rib structure for preventing channel cooling flat tube from deforming and flat tube reinforcing method |
| JP2023053650A (en) * | 2021-10-01 | 2023-04-13 | 日本電気硝子株式会社 | Apparatus and method for manufacturing glass article |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4081928B2 (en) * | 1999-07-27 | 2008-04-30 | 旭硝子株式会社 | Heater replacement device for melting tank |
| JP4789072B2 (en) * | 2006-10-20 | 2011-10-05 | 日本電気硝子株式会社 | Heat-resistant metal reinforcing tube, glass article manufacturing apparatus, and glass article manufacturing method |
| JP5731639B2 (en) * | 2012-04-05 | 2015-06-10 | ＡｖａｎＳｔｒａｔｅ株式会社 | Glass substrate manufacturing method and glass substrate manufacturing apparatus |
-
2014
- 2014-03-13 JP JP2014050287A patent/JP6281747B2/en active Active
-
2015
- 2015-02-27 CN CN201580013117.6A patent/CN106103363B/en active Active
- 2015-02-27 WO PCT/JP2015/055866 patent/WO2015137163A1/en active Application Filing
Also Published As
| Publication number | Publication date |
|---|---|
| JP2015174779A (en) | 2015-10-05 |
| CN106103363A (en) | 2016-11-09 |
| WO2015137163A1 (en) | 2015-09-17 |
| JP6281747B2 (en) | 2018-02-21 |
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