WO2013065481A1 - 計量器 - Google Patents
計量器 Download PDFInfo
- Publication number
- WO2013065481A1 WO2013065481A1 PCT/JP2012/076773 JP2012076773W WO2013065481A1 WO 2013065481 A1 WO2013065481 A1 WO 2013065481A1 JP 2012076773 W JP2012076773 W JP 2012076773W WO 2013065481 A1 WO2013065481 A1 WO 2013065481A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- plate
- dish
- gel
- annular
- spring
- Prior art date
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Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01G—WEIGHING
- G01G21/00—Details of weighing apparatus
- G01G21/23—Support or suspension of weighing platforms
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01G—WEIGHING
- G01G21/00—Details of weighing apparatus
- G01G21/22—Weigh pans or other weighing receptacles; Weighing platforms
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01G—WEIGHING
- G01G23/00—Auxiliary devices for weighing apparatus
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01G—WEIGHING
- G01G23/00—Auxiliary devices for weighing apparatus
- G01G23/005—Means for preventing overload
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01G—WEIGHING
- G01G23/00—Auxiliary devices for weighing apparatus
- G01G23/06—Means for damping oscillations, e.g. of weigh beams
Definitions
- the present invention relates to a measuring instrument applicable to any type of electromagnetic balance type, electrostatic capacity type or load cell type for measuring the mass of an object to be weighed placed on a dish based on a load acting on the dish holder from the dish.
- the present invention relates to a technique effective for a high-resolution measuring instrument.
- an overload particularly an impact load that imposes a large load in a shocking manner is known as a first factor that hinders accurate weighing.
- a shock absorber mechanism using an elastic member such as a coil spring or rubber has been proposed as a countermeasure to relieve and absorb the impact load (see Patent Documents 1 and 2). Since these shock absorber mechanisms absorb kinetic energy as the energy of coil springs and rubber, they are effective for stationary overloads.
- the weighing work by automatic machines has increased, and in the case of automatic machines, operations using motors and pneumatic equipment as drive sources are performed, so compared to manual weighing work, it is several times to several times.
- the impact load that the load of 10 times is applied is generated. Because this shock load has a high transmission speed, the shock absorber mechanism of the method of absorbing the kinetic energy as the energy of the coil spring or rubber is mechanically lowered using the conventional set load of coil spring or rubber, etc. The impact could not be absorbed sufficiently and proper weighing could not be performed, and the measuring instrument, particularly its sensor part, could not be protected, and sometimes the sensor part was destroyed.
- the present invention has been made in view of the above-described conventional problems, and the object of the present invention is to provide both the measurement error due to the first factor and the destruction of the sensor unit and the measurement error due to the second factor. It is in the place of providing a measuring instrument that has been eliminated.
- a dish on which an object to be weighed can be mounted, a dish holder arranged opposite to the dish, and fixed to the dish holder. And a conductive plate spring formed with a plurality of upward projecting pieces, and a dish that is mounted and integrated with each upper projecting piece so that the upper projecting piece of the plate spring is exposed from an opening provided at the tip of the top of the head
- a load receiving side of a weighing sensor for weighing an object to be weighed on the plate based on a load acting on the plate tray, and a contact surface of the weighing sensor on the upper surface.
- a gel-like buffer disposed on the top of the dish foot on the lower surface side via a mounting plate, and the dish and the dish supported by the gel-shaped buffer to conduct the dish and the dish receiver. It comprised from the electroconductive spring member arrange
- the conductive spring member is made of a coil spring or a leaf spring, and is supported by the gel-like buffer and contacts the upper protruding piece of the leaf spring. More specifically, for example, in the case of a coil spring, the upper end is supported by the gel buffer and the diameter is reduced toward the lower end, and the center holes of the gel buffer and the mounting plate are inserted through the lower ends. It is preferable that the upper end of the leaf spring is in contact with the upper plate and the upper end is in contact with the plate.
- the conductive spring member in addition to a metal or a conductive synthetic resin, a material obtained by conducting a conductive treatment on the surface of an insulating material can be considered.
- the shock absorber with a high transmission speed caused by weighing work by an automatic machine is absorbed by the deformation of the gel buffer, and at this time, the conductive spring member is also deformed to absorb the shock load by the gel buffer. More reliably, an error can be prevented from occurring in the measured value, and the sensor unit of the measuring instrument can be protected. Further, even if the tray is charged with static electricity, the static electricity can be surely released to the tray receiver via the upper protruding piece of the leaf spring by the conductive spring member.
- the mounting plate has an annular projecting edge that is annular and extends along the central hole, and the top of the dish support leg at the annular projecting edge portion.
- the gel-like buffer is annular and is fitted to the annular protrusion at the center hole and fixed to the mounting plate.
- the gel-type shock absorber can absorb the impact load with a high transmission speed caused by the weighing operation by an automatic machine. At this time, the annular gel-like shock absorber is formed on the annular rim of the mounting plate in the center hole. Since it is fitted and fixed in a stable state, it absorbs impact load more reliably and prevents breakage and breakage due to the creep phenomenon of the gel buffer, maintaining the buffer performance for a long time. .
- through holes are formed at the four corners of the plate support, and the leaf spring is fixed near the rear side edge of the plate support.
- the upper protruding pieces penetrating the through holes upward are formed on both ends of the lever, and the dish support is formed in a bowl shape and is provided on the top of the umbrella portion having an arcuate longitudinal section.
- the upper protruding pieces of the leaf springs are configured to be mounted and integrated with the upper protruding pieces so that the upper ends of the upper protruding pieces of the leaf springs are exposed from the openings.
- an error including a shock load having a high transmission speed and an error of a measured value due to charging due to static electricity are prevented, so that accurate weighing is always possible. Is assured and the sensor portion is prevented from being damaged by an impact load having a high transmission speed.
- the gel-like buffer is fixed to the mounting plate in a stable state, even if a strong impact including a shock load with a high transmission speed is applied, the weighing buffer is measured. An error in the value can be prevented more reliably, and the sensor part can be more reliably prevented from being damaged by an impact load having a high transmission speed.
- the measuring instrument according to claim 3 it is possible to reliably prevent an error in the measurement value due to an impact including an impact load having a high transmission speed or charging of static electricity, and an impact load having a high transmission speed.
- the sensor part is prevented from being broken by the above, and in addition, since the dish is supported without rattling, accurate weighing is ensured for a long time.
- FIG. 2 is a view showing a relationship between a load receiving portion and a measuring instrument main body when the leaf spring is fixed near both ends in the longitudinal direction, and is a cross-sectional view taken along line AA in FIG. It is an expanded sectional view which shows the state which supported the dish with the dish foot via the gel-like buffer.
- FIG. 5 is a sectional view taken along line BB in FIG. 4. It is sectional drawing which shows the state which fixed the coil spring and the mounting board to the dish via the gel buffer.
- FIG. 1 is a plan view of the weighing instrument according to an embodiment of the present invention when the tray is removed from the tray receiver of the load receiving portion.
- 2 is a right side view of the load receiving portion when the tray is mounted on the tray tray, and
- FIG. 3 shows the relationship between the load receiving portion and the main body of the measuring instrument when the leaf spring is fixed near both ends in the longitudinal direction.
- 1 is a cross-sectional view taken along the line AA in FIG. 1.
- FIG. 4 is an enlarged cross-sectional view showing a state in which the dish is supported by the dish support via the gel buffer.
- FIG. 5 is a cross-sectional view taken along the line BB in FIG.
- FIG. 6 and FIG. 6 are sectional views showing a state in which the coil spring and the mounting plate are fixed to the dish via the gel-like buffer.
- a measuring instrument constituting a capacitance type, electromagnetic balance type or load cell type measuring instrument includes a conductive plate 10 as one element of a load receiving unit. For example, it is formed in a substantially rectangular shape using stainless steel so that an object to be weighed can be mounted.
- the dish 10 has a flat portion 10a whose surface is formed flat, and a bent portion 10b bent downward from the flat portion 10a is integrally formed around the flat portion 10a. Yes.
- a dish tray 12 is disposed opposite to the dish 10.
- the dish receiver 12 is formed, for example, in a substantially rectangular shape in plan view by aluminum die casting.
- the dish receiver 12 includes a fixed portion 12a formed in a flat plate shape and both sides of the fixed portion 12a in the short direction (see FIG. 2 and the support part 12c formed in the shape of a substantially flat plate adjacent to the inclined part 12b.
- Six screw insertion holes 12d for inserting tapping screws are formed at both ends in the longitudinal direction of the fixing portion 12a of the tray receiver 12, and the portion slightly deviated from the center portion on the back surface side of the fixing portion 12a. Is formed with a protrusion 12e for connecting a weighing sensor (not shown). The projection 12e is connected to a load acting side of a capacitance type weighing sensor, an electromagnetic balance type weighing sensor, or a load cell type weighing sensor as a weighing sensor for weighing the mass of an object to be weighed on the plate 10. ing. In addition, circular through holes 12 f are formed at the four corners of the tray receiver 12.
- each leaf spring 14 constituting one element of a support portion 13 that supports the tray 10 from below is disposed on the back surfaces of both ends in the longitudinal direction of the tray receiver 12.
- each leaf spring 14 is formed in a substantially rectangular shape, and is disposed on both ends thereof corresponding to each through-hole 12 f and can be inserted into the through-hole 12 f.
- are formed at the center and six screw insertion holes 14b corresponding to the screw insertion holes 12d are provided near the center.
- the center portion of each leaf spring 14 is fixed to the bottom surface side of the tray receiver 12 by a tapping screw 16 inserted into the screw insertion hole 12d, and each upper protruding piece 14a is inserted into the through hole 12f and protrudes upward.
- the tip side of the piece 14 a protrudes above the tray receiver 12.
- a screw insertion hole 12d is formed in the protruding portion 12g formed on the bottom side of the fixed portion 12a of the tray receiver 12, and the central portion of the leaf spring 14 is fixed to the protruding portion (boss) 12g by a tapping screw 16.
- the leaf spring 14 is not clear in the figure, it is formed in a bottom shape that jumps upward toward the end where the upward protruding piece 14a is formed. Therefore, the elastic force of the leaf spring 14 causes the upward protruding piece 14a to It acts in the direction of projecting to the dish 10 side (upward projecting piece 14a is urged upward).
- each upward projecting piece 14a is formed on the tip side of each upward projecting piece 14a, and this bent portion 14c serves as a contact portion with a coil spring 22 described in detail later.
- the pan support 18 which will be described in detail later is positioned in the vertical direction and retained.
- Each of the upper protruding pieces 14a is plate-shaped and has the same thickness as a whole, but the width is narrowly formed by constricting the vicinity of the lower end.
- each of the upper protruding pieces 14 a arranged at the four corners of the tray receiver 12 is provided with a bowl-shaped tray receiver 18.
- Each plate foot 18 constitutes one element of the support portion 13 together with a pair of leaf springs 14 and is expanded as shown in FIGS. 4 and 5 as an elastic body made of rubber or resin (elastomer in the embodiment).
- a cylindrical body part 18a and an umbrella part 18b are provided.
- the cylindrical part 18a is formed so that attachment to the outer periphery of the upper protrusion piece 14a is possible so that the front-end
- the bulging portion 18d communicates with the inside of the cylindrical body portion 18 so that the tip of the upper protruding piece 14a can be exposed.
- a rectangular opening 18c is provided.
- the bulging portion 18 d of the umbrella portion 18 b is for positioning and supporting the mounting plate 20, and the bulging portion 18 d has an annular shape and extends upward along the central hole.
- a mounting plate 20 having an annular projecting edge 20a protruding to the end is fitted at the inner peripheral portion of the lower end of the annular projecting edge 20a. This fitting state is set so that the mounting plate 20 can be displaced with respect to the bulging portion 18d when a large horizontal load greater than or equal to a predetermined value is applied.
- An annular gel buffer body 21 is fixed to the mounting plate 20 on the lower surface in a state of being fitted to the annular projecting edge 20a of the mounting plate 20 at the center hole thereof.
- the upper surface is fixed to the bottom surface of the dish 10 (see FIG. 6).
- the gel-like buffer body 21 is preferably made of a material that can absorb impact energy by diffusing longitudinal impact in the lateral direction.
- a material that is excellent in buffer performance such as sorbosein (trade name) and that can be easily processed is suitable.
- the fixing can be easily performed by providing a double-sided tape on the upper and lower surfaces in advance.
- a coil spring 22 made of a metal such as stainless steel, which is a conductive spring member, is supported on the upper surface of the gel buffer body 21, and the coil spring 22 is reduced in diameter toward the lower end, and the gel buffer body 21 and the front of the gel buffer body 21.
- Each center hole of the mounting plate 20 is inserted, and in contact with the bent portion 14c of the upper projecting piece 14a at the lower end, it is in contact with the plate 10 at the upper end.
- the maximum diameter of the coil spring 22 is set to be larger than the diameter of the central hole of the gel buffer 21. For example, when the diameter of the central hole is 10 mm, the maximum diameter of the coil spring 22 is preferably about 11.5 mm. is there.
- the dish 10 is planarly supported by the four gel buffers 21, and the impact applied from above the dish 10 is also absorbed by the gel buffers 21, so that the vertical and horizontal displacements are reduced. Effectively absorbed, no play is generated between the tray support 18 and the tray 10, and by using the mounting plate 20, the gel buffer 21 is caused by a creep phenomenon at a pressure exceeding a certain value. The buffer performance is maintained over a long period of time without breaking or breaking.
- the measuring instrument main body 30 includes an upper case 32 and a lower case 34, and the upper case 32 and the lower case 34 are integrally formed.
- the upper case 32 is formed with a substantially rectangular recess 32a having a size matching the outer shape of the tray 10, and a projection 12e on the tray receiver 12 side is connected to a position slightly shifted from the center of the recess 32a.
- a dish receiving joint 32b is disposed.
- the tray support joint 32b is formed in an annular shape, and its outer peripheral side is connected to an annular diaphragm (not shown).
- the diaphragm has an outer peripheral side connected to an upper case 32 via an annular diaphragm presser (not shown).
- the tray receiving joint 32b is supported by the upper case 32 so as to be movable up and down via a diaphragm and a diaphragm presser.
- the dish receiving joint 32b is connected to a weighing sensor (not shown) disposed in the lower case 34, and a measurement value of the weighing sensor is displayed on a display unit (not shown). .
- stoppers 32e are provided at the four corners of the recess 32a of the upper case 32 corresponding to the positions of the upper protruding pieces 14a of the plate springs 14.
- Each stopper 32e is formed in a substantially columnar shape, and protrudes from the recess 32a toward the tray receiver 12 side.
- Each stopper 32e comes into contact with both ends in the longitudinal direction of the plate spring 14 elastically deformed downward when a normal excessive load with a low transmission speed is applied from the plate 10 to the plate spring 14, and the entire plate support 12 is excessively large. By preventing the sinking, an excessive load is prevented from acting on the weighing sensor.
- the plate receiving device 12 is connected to the measuring device main body. 30.
- the lower surface of the gel buffer 21 is bonded and fixed to the mounting plate 20, the coil spring 22 is supported on the gel buffer 21, and the upper surface of the gel buffer 21 is placed on the plate 10. Adhering and fixing to the lower surface of a predetermined position at the four corners. Then, the placing plate 20 is fitted to the bulging portion 18 d of the tray receiving foot 18, and the tray 10 is placed on the tray receiving foot 18 so as to be integrated as a measuring instrument. Installation of the installation plate 20 on the bulging portion 18d can be easily and reliably positioned by fitting the annular protruding edge 20a to the bulging portion 18d, and there is no play between the two. . However, when a large horizontal load greater than or equal to a predetermined value is applied to the plate 10, the mounting plate 20 is displaced with respect to the bulging portion 18d, and the normal fitting support state is released.
- the bottom 10 of the weighing instrument is supported by the tray support 18 via the gel-like cushioning body 21 and the lower end of the coil spring 22 and the bent portion 14c of the upper protruding piece 14a are provided.
- the upper end of the coil spring 22 and the bottom surface of the plate 10 are reliably in contact with each other, and a conduction state is ensured. That is, the leaf spring 14 forms a conduction path connecting the plate 10 and the plate tray 12 via the coil spring 22 as an element of the support portion 13, and the plate 10 and the plate plate 12 have the same potential.
- the four corners on the lower surface side of the dish 10 are annular gel-like buffers fixed to the annular mounting plate 20 fitted to the inflated portion 18d of the top of the dish support 18 made of elastomer. Since it is supported by the body 21 and the coil spring 22, no vertical or horizontal play occurs between the plate 10 and the support portion 13 during weighing. If a flexible hook-shaped projecting piece is provided on the top surface of the bulging portion 18d of the tray receiving foot 18, the contact state between the tray receiving foot 18 and the mounting plate 20 is further improved, and the backlash is reduced. Occurrence prevention action is further improved.
- the coil spring 22 is employed as the conductive spring member, but a leaf spring 23 shown in FIGS. 7 and 8 may be used instead of the coil spring 22.
- the leaf spring 23 is composed of a curved bent portion 23b extending downward from the inner edge of the annular support portion 23a supported by the gel buffer 21, and an upward protruding piece at the lowermost portion of the bent portion 23b. It contacts the bent portion 14c of 14a.
- the support by the gel-like buffer 21 becomes stable, but instead of this annular support part 23a, a straight support part is provided on the uppermost end extension of the flexible part 23b. It may be provided.
- the leaf spring 14 and the coil spring 22 of this embodiment are made of metal such as stainless steel having excellent elastic strength, it is made of conductive synthetic resin (plastic) for measuring relatively light objects. Also good.
- the gel buffer 21 can be fixed by using a double-sided tape or by applying an appropriate adhesive. Further, when the dish 10 and the gel buffer 21 are fixed, after the annular mounting plate 20 is fitted to the inflating portion 18 d at the top of the dish support 18, the dish 10 is placed on the upper surface of the gel buffer 21. It may be placed and fixed.
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- Physics & Mathematics (AREA)
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- Vibration Prevention Devices (AREA)
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Abstract
Description
12 皿受
12d ネジ挿入孔
12e 突起
12f 貫通孔
13 支持部
14 板バネ
14a 上方突出片
14b ネジ挿通孔
14c 折曲部
16 タッピングネジ
18 皿受足
18a 筒体部
18b 傘部
18c 開口
18d 膨出部
20 載置板
20a 環状突縁
21 ゲル状緩衝体
22 コイルバネ
23 板バネ
30 計量器本体
32 上ケース
34 下ケース
Claims (3)
- 被計量物が搭載可能に形成された皿と、前記皿と相対向して配置された皿受と、前記皿受に固定されて複数の上方突出片が形成された導電性の板バネと、頭頂部先端に設けた開口から前記板バネの上方突出片が露出するように各上方突出片に装着一体化された皿受足とを備え、前記皿受には、前記板バネを介して前記皿受に作用する荷重を基に前記皿上の被計量物を計量する計量センサの荷重作用側が連結されてなる計量器であって、
前記皿と前記皿受足との間には、上面で前記皿と接触し下面側で前記皿受足の頭頂部に載置板を介して設置されたゲル状緩衝体を配置する一方、前記ゲル状緩衝体に支持され、下端において前記板バネの上方突出片と接触し、上端において前記皿と接触する導電性バネ部材を設けたことを特徴とする計量器。 - 請求項1に記載の計量器において、前記載置板は、環状で中央孔に沿った環状突縁を有し、この環状突縁部分において前記皿受足の頭頂部に設置され、前記ゲル状緩衝体は、環状で、前記環状突縁にその中央孔において嵌合されて前記載置板に固定されてなることを特徴とする計量器。
- 請求項1または2に記載の計量器において、前記皿受の四隅には貫通孔が形成され、前記板バネは、前記皿受の裏面側縁部寄りに固定されてその両端側に前記各貫通孔を上方に貫通する上方突出片が形成されてなり、前記皿受足は、茸型に形成されて、その縦断面円弧状の傘部頭頂部に設けた開口から前記板バネの上方突出片の上端が露出するように各上方突出片に装着一体化されてなることを特徴とする計量器。
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
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DE112012004619.6T DE112012004619B4 (de) | 2011-11-04 | 2012-10-17 | Messvorrichtung |
US14/353,640 US9285263B2 (en) | 2011-11-04 | 2012-10-17 | Measurement device |
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JP2011-241810 | 2011-11-04 | ||
JP2011241810A JP5777250B2 (ja) | 2011-11-04 | 2011-11-04 | 計量器 |
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WO2013065481A1 true WO2013065481A1 (ja) | 2013-05-10 |
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PCT/JP2012/076773 WO2013065481A1 (ja) | 2011-11-04 | 2012-10-17 | 計量器 |
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US (1) | US9285263B2 (ja) |
JP (1) | JP5777250B2 (ja) |
DE (1) | DE112012004619B4 (ja) |
WO (1) | WO2013065481A1 (ja) |
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CN112539820A (zh) * | 2020-11-27 | 2021-03-23 | 福建永荣锦江股份有限公司 | 一种具有缓冲机构的称重装置及其使用方法 |
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NL2009949C2 (en) * | 2012-12-10 | 2014-06-11 | Stertil Bv | Lifting column for lifting a load, lifting system provided therewith and method for measuring a load. |
JP6756978B2 (ja) * | 2016-10-18 | 2020-09-16 | 日本電気硝子株式会社 | 質量測定装置及び質量測定方法 |
CN109077602A (zh) * | 2018-10-22 | 2018-12-25 | 广州阿尔卑斯供应链管理有限公司 | 一种电饭煲 |
CN109932030A (zh) * | 2019-02-15 | 2019-06-25 | 马骏 | 一种用于有机垃圾处理的便于清洁的安全型称重设备 |
CN111591364B (zh) * | 2020-05-12 | 2022-05-06 | 上海交通大学 | 被动电磁式可重复缓冲机器人腿系统及缓冲机器人 |
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- 2012-10-17 DE DE112012004619.6T patent/DE112012004619B4/de active Active
- 2012-10-17 US US14/353,640 patent/US9285263B2/en active Active
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JP2002214030A (ja) * | 2001-01-19 | 2002-07-31 | A & D Co Ltd | 秤の緩衝機構 |
JP2005283334A (ja) * | 2004-03-30 | 2005-10-13 | A & D Co Ltd | 計量器 |
JP2008116223A (ja) * | 2006-11-01 | 2008-05-22 | A & D Co Ltd | 電子秤 |
JP2012083329A (ja) * | 2010-09-14 | 2012-04-26 | Tanita Corp | 秤 |
Cited By (1)
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CN112539820A (zh) * | 2020-11-27 | 2021-03-23 | 福建永荣锦江股份有限公司 | 一种具有缓冲机构的称重装置及其使用方法 |
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US9285263B2 (en) | 2016-03-15 |
JP5777250B2 (ja) | 2015-09-09 |
US20140291043A1 (en) | 2014-10-02 |
DE112012004619B4 (de) | 2023-09-07 |
DE112012004619T5 (de) | 2014-08-21 |
JP2013096925A (ja) | 2013-05-20 |
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