EP3885482A1 - Aiguille de machine à coudre à point de chaînette de recouvrement et procédé de couture utilisant une machine à coudre à point de chaînette de recouvrement - Google Patents

Aiguille de machine à coudre à point de chaînette de recouvrement et procédé de couture utilisant une machine à coudre à point de chaînette de recouvrement Download PDF

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Publication number
EP3885482A1
EP3885482A1 EP21161200.7A EP21161200A EP3885482A1 EP 3885482 A1 EP3885482 A1 EP 3885482A1 EP 21161200 A EP21161200 A EP 21161200A EP 3885482 A1 EP3885482 A1 EP 3885482A1
Authority
EP
European Patent Office
Prior art keywords
needle
sewing machine
chain stitch
stitch sewing
covering chain
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP21161200.7A
Other languages
German (de)
English (en)
Other versions
EP3885482B1 (fr
Inventor
Kazutaka Hakoyama
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Organ Needle Co Ltd
Original Assignee
Organ Needle Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Organ Needle Co Ltd filed Critical Organ Needle Co Ltd
Publication of EP3885482A1 publication Critical patent/EP3885482A1/fr
Application granted granted Critical
Publication of EP3885482B1 publication Critical patent/EP3885482B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B85/00—Needles
    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B85/00—Needles
    • D05B85/02—Needles with slotted eyes, i.e. with a slit leading to the eye for thread insertion
    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B55/00—Needle holders; Needle bars
    • D05B55/10—Needle bars for multiple-needle sewing machines

Definitions

  • the present invention relates to a needle used for a covering chain stitch sewing machine, and a sewing method using the covering chain stitch sewing machine.
  • a covering chain stitch sewing machine has a configuration in which a plurality of (two to four) needles are attached in parallel and at different heights in a direction perpendicular to a fabric feeding direction.
  • the plurality of needles move up and down so as to form a plurality of loops under a fabric, and the plurality of loops are then scooped by a looper.
  • the covering chain stitch sewing machine performs sewing.
  • the loops under the fabric are formed by the following actions. That is, first, each of the needles is lowered to a position of a bottom dead center, and a needle thread that has been run through a needle eye is pulled down to be tensed under the fabric. When the needle moves upward at this state, the needle thread is pressed due to its friction against the fabric. Therefore, the needle thread loosens under the fabric so that the loop is formed. Since the plurality of needles move up and down simultaneously, the loops are formed as many as the number of the needles.
  • the looper scoops the plurality of loops formed thus under the fabric
  • the looper scoops them sequentially one by one. Therefore, the looper jumps into the loops respectively at different timings from one another.
  • the looper scoops the loops sequentially one by one when the needles are rising from the positions of the bottom dead centers. Therefore, when the jumping timings of the looper are different from one another, movement distances of the needles from the positions of the bottom dead centers are also different from one another. Even if the movement distances of the needles from the positions of the bottom dead centers are different from one another in this manner, the heights of the needles at the jumping timings of the looper need to be equalized (it is necessary to adjust each of heights of scarf portions to a height of the looper). To solve this problem, the needles are attached to a needle bar of the sewing machine at different heights respectively.
  • the first needle onto which the looper jumps is attached at a highest position.
  • the last needle onto which the looper jumps is attached at a lowest position.
  • the first needle onto which the looper jumps encounters the looper at a comparatively early timing after the needle starts rising. Therefore, the rising distance of the needle required for forming a loop (the rising distance of the needle from the position of the bottom dead center to the position where the needle encounters the looper) is small. Therefore, there is a possibility that the loop may be formed too insufficiently to be scooped by the looper, thereby causing occurrence of stitch skipping.
  • an object of the present invention is to provide a covering chain stitch sewing machine needle that can be used as each of needles in a covering chain stitch sewing machine so as to reduce differences in size among loops formed by the needles as much as possible, and a sewing method.
  • a first invention provides a covering chain stitch sewing machine needle used as each of needles in a covering chain stitch sewing machine that performs sewing in such a manner that the needles arranged in parallel and at different heights in a direction perpendicular to a fabric feeding direction move up and down so as to form loops under a fabric, and the loops are then scooped by a looper, the covering chain stitch sewing machine needle including: a shank portion that is held when the covering chain stitch sewing machine needle is attached to the sewing machine; and a needle shaft portion that has a thread hole formed at a front end portion of the needle shaft portion and that can be inserted into and extracted from the fabric; wherein: in the needle shaft portion, a front groove extending from an opening edge of the thread hole toward the shank portion is formed, and a scarf portion having a shape formed by recessing the contour of the needle shaft portion is formed on a back side of the front groove; and the front groove that has a step portion on the shank portion side with respect
  • a second invention provides a sewing method using a covering chain stitch sewing machine performing sewing in such a manner that covering chain stitch sewing machine needles arranged in parallel and at different heights in a direction perpendicular to a fabric feeding direction move up and down so as to form loops under a fabric, and the loops are then scooped by a looper, wherein: each of the covering chain stitch sewing machine needles includes a shank portion that is held when the covering chain stitch sewing machine needle is attached to the sewing machine, and a needle shaft portion that has a thread hole formed at a front end portion of the needle shaft portion and that can be inserted into and extracted from the fabric; in the needle shaft portion, a front groove extending from an opening edge of the thread hole toward the shank portion is formed, and a scarf portion having a shape formed by recessing the contour of the needle shaft portion is formed on a back side of the front groove; and the front groove that has a step portion on the shank portion side with respect to the scarf portion is formed so that a depth of the covering chain
  • the front groove of the covering chain stitch sewing machine needle that has the step portion on the shank portion side with respect to the scarf portion is formed so that the depth of the groove at the step portion increases from the needle tip side toward the shank portion. That is, a shallow groove portion is formed on the needle tip side with respect to the step portion, and a deep groove portion is formed on the shank portion side with respect to the step portion.
  • a shallow groove portion is formed on the needle tip side with respect to the step portion
  • a deep groove portion is formed on the shank portion side with respect to the step portion.
  • the first needle onto which the looper jumps is attached at a highest position. Therefore, the first needle onto which the looper jumps is inserted into the fabric comparatively shallowly even in the case where the needle has moved to a position of a bottom dead center. Since the needle rises at this state to form a loop, the loop is formed by use of the shallow groove portion on the needle tip side. Accordingly, even in a case where a rising distance of the needle required for forming the loop (the rising distance of the needle from the position of the bottom dead center to a position where the needle encounters the looper) is small, the loop is still allowed to grow sufficiently largely by use of the shallow groove portion.
  • the last needle onto which the looper jumps is attached at a lowest position. Therefore, the last needle onto which the looper jumps is inserted into the fabric comparatively deeply when the needle has moved to another position of another bottom dead center. Since the needle rises at this state to form a loop, the loop is formed by use of the deep groove portion on the shank portion side and the shallow groove portion on the needle tip side. Accordingly, even in a case where a rising distance of the needle required for forming the loop (the rising distance of the needle from the position of the bottom dead center to a position where the needle encounters the looper) is large, the loop does not grow so largely when the deep groove portion passes through the fabric, and the loop is allowed to grow when the shallow groove portion passes through the fabric. That is, since the growth of the loop can be suppressed by the deep groove portion, the loop can be prevented from becoming excessively large.
  • the covering chain stitch sewing machine needles according to the present invention, differences in size among the loops formed when the needles encounter the looper can be reduced even if the needles are attached at the different heights.
  • the sizes of the loops are made as uniform as possible, so that stitch skipping can be prevented.
  • Covering chain stitch sewing machine needles 10 are needles used in a covering chain stitch sewing machine. Since the covering chain stitch sewing machine has been well known in the background art, detailed description thereof will be omitted here.
  • the covering chain stitch sewing machine performs sewing as follows. That is, the covering chain stitch sewing machine needles 10 that are arranged in parallel and at different heights in a direction perpendicular to a fabric feeding direction move up and down so as to form loops under a fabric, and the loops are then scooped by a looper.
  • the covering chain stitch sewing machine needles 10 according to the present embodiment which have one and the same configuration, are in use attached to such a covering chain stitch sewing machine.
  • each of the covering chain stitch sewing machine needles 10 includes a shank portion 11 and a needle shaft portion 20.
  • the shank portion 11 is held when the covering chain stitch sewing machine needle 10 is attached to the sewing machine.
  • the needle shaft portion 20 is provided on a front end side with respect to the shank portion 11.
  • the shank portions 11 are held by a needle stopper portion 31 of the sewing machine so as to be attached thereto.
  • the needle stopper portion 31 of the sewing machine is provided on a front end of a needle bar 30 that moves up and down when sewing is performed by the sewing machine. Since the sewing machine according to the present embodiment uses three covering chain stitch sewing machine needles 10, the three covering chain stitch sewing machine needles 10 are attached to the needle stopper portion 31. As shown in FIGS. 3A to 3C , the three covering chain stitch sewing machine needles 10 are attached with needle tips 21 gradually higher from left to right of FIGS. 3A to 3C .
  • the three covering chain stitch sewing machine needles 10 are attached in parallel in the direction perpendicular to the fabric feeding direction.
  • the sewing machine using the three covering chain stitch sewing machine needles 10 will be described in the present embodiment.
  • the number of the needles is not limited to three but may be two or may be four or more.
  • the needles are attached to be gradually higher from the left to the right when viewed from a front side (a downstream side in the fabric feeding direction).
  • the present embodiment is not limited thereto.
  • the needles may be attached to be gradually higher from the right to the left.
  • the needle shaft portion 20 is a part that can be inserted into and extracted from a fabric 35 when sewing is performed.
  • a front end of the needle shaft portion 20 has a sharp shape to form the needle tip 21.
  • a thread hole 22 required for running a needle thread therethrough is bored in the vicinity of the front end of the needle shaft portion 20.
  • the needle tip 21 does not always have to have the sharp shape, but may, for example, have a ball shape or the like.
  • a front groove 23 extending from an opening edge of the thread hole 22 toward the shank portion 11 is formed on a front side of the needle shaft portion 20.
  • the front groove 23 that is a groove required for guiding the needle thread run through the thread hole 22 is provided to extend in a longitudinal direction of the needle shaft portion 20.
  • a scarf portion 24 is formed on a back side of the needle shaft portion 20 (in an opposite face to a face where the front groove 23 is formed) and on the shank portion 11 side with respect to the thread hole 22.
  • the scarf portion 24 is formed into a shape formed by recessing the contour of the needle shaft portion 20.
  • the scarf portion 24 is provided adjacently to the thread hole 22 (a distance between the scarf portion 24 and the thread hole 22 is formed to be shorter than a width of the thread hole 22 in the longitudinal direction in the present embodiment).
  • a back groove 25 is further formed on the shank portion 11 side with respect to the scarf portion 24.
  • the back groove 25 that is a groove required for guiding the needle thread run through the thread hole 22 is provided to extend in the longitudinal direction of the needle shaft portion 20.
  • the aforementioned front groove 23 is formed to have a depth changing as it goes in the longitudinal direction.
  • the aforementioned front groove 23 has a step portion 23a, and the front groove 23 is formed so that a depth of the groove at the step portion 23 a increases from the needle tip 21 side toward the shank portion 11.
  • the step portion 23a is provided on the shank portion 11 side (an upper side in FIGS. 2A and 2B ) with respect to the scarf portion 24. More specifically, the step portion 23a is provided on the shank portion 11 side with respect to a halved place (a longitudinally middle position M of the needle shaft portion 20) of a length H of the needle shaft portion 20.
  • the depth of the groove in the present embodiment is defined by a distance between a center line C of the needle (see FIGS. 2A and 2B ) and a bottom face of the groove. That is, the depth of the groove is defined with reference to the center line C of the needle regardless of the contour shape of the needle. Therefore, “the groove is deep” means that the distance between the center line C of the needle and the bottom face of the groove is short, and “the groove is shallow” means the distance between the center line C of the needle and the bottom face of the groove is long.
  • the step portion 23a is formed to be inclined in its bottom face so that the groove is gradually deeper as it goes from the needle tip 21 side toward the shank portion 11.
  • the bottom face of the step portion 23a is formed to be slightly curved. That is, the bottom face of the step portion 23a is a curved face that bulges in a direction in which the groove is deeper.
  • the shape of the step portion 23a is not limited to such a curved face.
  • the shape of the step portion 23a may be a curved face bulging in a direction in which the groove is shallower, or may be a flat face.
  • a portion of the front groove 23 on the needle tip 21 side with respect to the step portion 23a is a shallow groove portion 23b in which the groove is relatively shallow.
  • the step portion 23a is formed continuously to the shank portion 11 side of the shallow groove portion 23b.
  • a depth of the shallow groove portion 23b is constant. Specifically, as shown in FIG. 2B , a distance K between the center line C of the needle and a bottom face D1 of the shallow groove portion 23b is formed to be constant over an entire length of the shallow groove portion 23b.
  • a portion of the front groove 23 on the shank portion 11 side with respect to the step portion 23a is a deep groove portion 23c in which the groove is deeper than the shallow groove portion 23b.
  • the step portion 23a is formed continuously to the needle tip 21 side of the deep groove portion 23c.
  • a depth of the deep groove portion 23c is constant.
  • a distance between the center line C of the needle and a bottom face D2 of the deep groove portion 23c is formed to be constant over an entire length of the deep groove portion 23c.
  • the bottom face D2 of the deep groove portion 23c is formed so as to pass through the center line C of the needle.
  • a portion of the front groove 23 on the shank portion 11 side with respect to the deep groove 23c is an inclined portion 23e that is gently inclined so as to be gradually shallower as it goes toward the shank portion 11.
  • the inclined portion 23e is formed continuously to the shank portion 11 side of the deep groove portion 23c.
  • the front groove 23 according to the present embodiment is formed so that the depth of the front groove 23 changes at the step portion 23a. Even if the depth changes at the step portion 23a, a width of the front groove 23 is constant. That is, the width of the front groove 23 is constant over the shallow groove portion 23b, the step portion 23a, and the deep groove portion 23c.
  • the step portions 23a at each of which the depth of the front groove 23 is changed thus are formed at the following positions. That is, the step portion 23a in a covering chain stitch sewing machine needle 10 (right needle N1 in FIG. 3A ) attached at a highest position among the covering chain stitch sewing machine needles 10 does not penetrate the fabric 35 placed on a needle plate 32, and the step portion 23a in a covering chain stitch sewing machine needle 10 (left needle N3 in FIG. 3A ) attached at a lowest position among the covering chain stitch sewing machine needles 10 penetrates the fabric 35 placed on the needle plate 32.
  • the right needle N1 which is the covering chain stitch sewing machine needle 10 attached at the highest position among the covering chain stitch sewing machine needles 10
  • the left needle N3 which is the covering chain stitch sewing machine needle 10 attached at the lowest position among the plurality of covering chain stitch sewing machine needles 10
  • the step portion 23a of the left needle N3 is positioned under the fabric 35 in the state in which the left needle N3 has moved to the position of the bottom dead center.
  • the three covering chain stitch sewing machine needles 10 are attached to the needle bar 30 (the needle stopper portion 31) of the sewing machine.
  • the three covering chain stitch sewing machine needles 10 are arranged in parallel and at the different heights in the direction perpendicular to the fabric feeding direction.
  • the needle attached at the highest position is referred to as right needle N1
  • the needle attached at the lowest position is referred to as left needle N3
  • a needle attached at an intermediate height between the right needle N1 and the left needle N3 is referred to as middle needle N2.
  • These needles are attached in parallel at equal intervals in the order of the right needle N1, the middle needle N2, and the left needle N3 in a direction from right to left of FIGS. 3A to 3C . All the three covering chain stitch sewing machine needles 10 are the same needles.
  • the needle plate 32 required for placing the fabric 35 to be sewn thereon is provided under the needle bar 30 of the sewing machine. Holes are bored in the needle plate 32 so that the covering chain stitch sewing machine needles 10 can be made to penetrate through the holes.
  • the covering chain stitch sewing machine needles 10 in the needle bar 30 of the sewing machine move to the positions of the bottom dead centers, and needle threads (not shown) run through the thread holes 22 are pulled down to be tensed, as shown in FIG. 3A .
  • the step portion 23a of the right needle N1 is not positioned under the fabric 35.
  • the step portion 23a of the left needle N3 is positioned under the fabric 35.
  • P1a shown in FIG. 3A is the position of the upper face of the fabric 35 when the right needle N1 is at the position of the bottom dead center, i.e. a reference position where the formation of the loop is started in the right needle N1.
  • P3a shown in FIG. 3A is the position of the upper face of the fabric 35 when the left needle N3 is at the position of the bottom dead center, i.e. a reference position where the formation of the loop is started in the left needle N3.
  • the right needle N1 and the looper first intersect each other so that the loop formed by the right needle N1 is scooped by the looper.
  • the position of a lower face of the fabric 35 on this occasion is a reference line where the formation of the loop is terminated.
  • P1b shown in FIG. 3B is the position of the lower face of the fabric 35 at the timing at which the right needle N1 encounters the looper, i.e. a reference position where the formation of the loop is terminated in the right needle N1. Therefore, as shown in FIGS. 2A and 2B , a range from P1a to P1b is a loop forming section S1 in the right needle N1.
  • the middle needle N2 and the looper intersect each other so that the loop formed by the middle needle N2 is scooped by the looper.
  • P3b shown in FIG. 3C is the position of the lower face of the fabric 35 at a timing at which the left needle N3 encounters the looper, i.e. a reference position where the formation of the loop is terminated in the left needle N3. Therefore, as shown in FIGS. 2A and 2B , a range from P3a to P3b is a loop forming section S3 in the left needle N3
  • the loop forming section S1 in the right needle N1 is entirely the shallow groove portion 23b, as shown in FIGS. 2A and 2B . Therefore, the resistance between the needle thread and the fabric 35 during the formation of the loop is so large that a sufficiently large loop can be formed even by the right needle N1 which is small in rising distance to the position where the right needle N1 encounters the looper.
  • the loop forming section S3 in the left needle N3 includes the deep groove portion 23c and the shallow groove portion 23b. Therefore, when the deep groove portion 23c is passing through the fabric 35, the resistance between the needle thread and the fabric 35 is reduced so that growth of the loop is suppressed. Therefore, the loop can be prevented from growing too largely even by the left needle N3 which is large in rising distance to the position where the left needle N3 encounters the looper.
  • the front groove 23 of the covering chain stitch sewing machine needle 10 that has the step portion 23a on the shank portion 11 side with respect to the scarf portion 24 is formed so that the depth of the groove at the step portion 23a increases from the needle tip 21 side toward the shank portion 11. That is, the shallow groove portion 23b is formed on the needle tip 21 side with respect to the step portion 23a, and the deep groove portion 23c is formed on the shank portion 11 side with respect to the step portion 23a.
  • the needle shaft portion 20 in the range where the shallow groove portion 23b is formed is extracted from the fabric 35, the resistance of the needle thread interposed between the shallow groove portion 23b and the fabric 35 is large. Therefore, the needle thread is pressed so that the loop is easy to grow.
  • the resistance of the needle thread interposed between the deep groove portion 23c and the fabric 35 is small. Therefore, the loop is hard to grow.
  • the first needle (the right needle N1) onto which the looper jumps is attached at the highest position. Therefore, even when the needle has moved to the position of the bottom dead center, the needle is inserted into the fabric 35 relatively shallowly. Since the needle rises at this state to form a loop, the loop is formed by use of the shallow groove portion 23b on the needle tip 21 side. Accordingly, even in the case where the rising distance of the needle required for forming the loop (the rising distance of the needle from the position of the bottom dead center to the position where the needle encounters the looper) is small, the loop is still allowed to grow sufficiently largely by use of the shallow groove portion 23b.
  • the last needle (the left needle N3) onto which the looper jumps is attached at the lowest position. Therefore, when the needle has moved to the position of the bottom dead center, the needle is inserted into the fabric 35 relatively deeply. Since the needle rises at this state to form a loop, the loop is formed by use of the deep groove portion 23c on the shank portion 11 side and the shallow groove portion 23b on the needle tip 21 side. Accordingly, even in the case where the rising distance of the needle required for forming the loop (the rising distance of the needle from the position of the bottom dead center to the position where the needle encounters the looper) is large, the loop does not grow so largely when the deep groove portion 23c passes through the fabric 35, and the loop is allowed to grow when the shallow groove portion 23b passes through the fabric 35. That is, since the growth of the loop can be suppressed by the deep groove portion 23c, the loop can be prevented from becoming excessively large, and stitch skipping caused by fall down of the loop can be prevented.
  • the covering chain stitch sewing machine needles 10 according to the present embodiment, differences in size among the loops formed when the needles encounter the looper can be reduced even if the needles are attached at different heights.
  • the sizes of the loops are made as uniform as possible, so that stitch skipping can be prevented.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Sewing Machines And Sewing (AREA)
EP21161200.7A 2020-03-26 2021-03-08 Aiguille de machine à coudre à point de chaînette de recouvrement et procédé de couture utilisant une machine à coudre à point de chaînette de recouvrement Active EP3885482B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2020056133A JP7371915B2 (ja) 2020-03-26 2020-03-26 偏平縫いミシン用針および偏平縫いミシンを使用した縫製方法

Publications (2)

Publication Number Publication Date
EP3885482A1 true EP3885482A1 (fr) 2021-09-29
EP3885482B1 EP3885482B1 (fr) 2023-08-16

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EP21161200.7A Active EP3885482B1 (fr) 2020-03-26 2021-03-08 Aiguille de machine à coudre à point de chaînette de recouvrement et procédé de couture utilisant une machine à coudre à point de chaînette de recouvrement

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EP (1) EP3885482B1 (fr)
JP (1) JP7371915B2 (fr)
CN (1) CN113445223A (fr)
PT (1) PT3885482T (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4458614A (en) * 1982-01-08 1984-07-10 Organ Needle Co. Ltd. Sewing machine needle
EP1127973A1 (fr) * 2000-02-23 2001-08-29 Groz-Beckert KG Aiguille de couture pour couture multidirectionnelle
JP2008142498A (ja) * 2006-12-07 2008-06-26 Yamato Sewing Mach Co Ltd 上飾り機構付きミシン
US20100077949A1 (en) * 2008-09-26 2010-04-01 Takayuki Hayashida Sewing machine for covering chain stitch
JP2012045134A (ja) 2010-08-26 2012-03-08 Pegasus Sewing Mach Mfg Co Ltd 偏平縫い目構造と偏平縫いミシン

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4296560B2 (ja) 1999-12-30 2009-07-15 ヤマトミシン製造株式会社 二重環縫いミシンの針糸案内装置
JP2004141468A (ja) 2002-10-25 2004-05-20 Organ Needle Co Ltd ミシン針
JP6960631B2 (ja) 2017-10-18 2021-11-05 オルガン針株式会社 ミシン針

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4458614A (en) * 1982-01-08 1984-07-10 Organ Needle Co. Ltd. Sewing machine needle
EP1127973A1 (fr) * 2000-02-23 2001-08-29 Groz-Beckert KG Aiguille de couture pour couture multidirectionnelle
JP2008142498A (ja) * 2006-12-07 2008-06-26 Yamato Sewing Mach Co Ltd 上飾り機構付きミシン
US20100077949A1 (en) * 2008-09-26 2010-04-01 Takayuki Hayashida Sewing machine for covering chain stitch
JP2012045134A (ja) 2010-08-26 2012-03-08 Pegasus Sewing Mach Mfg Co Ltd 偏平縫い目構造と偏平縫いミシン

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JP2021153783A (ja) 2021-10-07
CN113445223A (zh) 2021-09-28
JP7371915B2 (ja) 2023-10-31
EP3885482B1 (fr) 2023-08-16
PT3885482T (pt) 2023-11-08

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