JP7484555B2 - Wire rod straightening device - Google Patents

Wire rod straightening device Download PDF

Info

Publication number
JP7484555B2
JP7484555B2 JP2020137378A JP2020137378A JP7484555B2 JP 7484555 B2 JP7484555 B2 JP 7484555B2 JP 2020137378 A JP2020137378 A JP 2020137378A JP 2020137378 A JP2020137378 A JP 2020137378A JP 7484555 B2 JP7484555 B2 JP 7484555B2
Authority
JP
Japan
Prior art keywords
wire
induction heating
coil
straightening
heating device
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.)
Active
Application number
JP2020137378A
Other languages
Japanese (ja)
Other versions
JP2022033473A (en
Inventor
祥一 橘
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.)
Daido Steel Co Ltd
Original Assignee
Daido Steel 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 Daido Steel Co Ltd filed Critical Daido Steel Co Ltd
Priority to JP2020137378A priority Critical patent/JP7484555B2/en
Publication of JP2022033473A publication Critical patent/JP2022033473A/en
Application granted granted Critical
Publication of JP7484555B2 publication Critical patent/JP7484555B2/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Landscapes

  • Wire Processing (AREA)

Description

本発明は、コイルから引き出した鋼の線材を矯正する線材の矯正装置に関するものである。 The present invention relates to a wire straightening device that straightens steel wire drawn from a coil.

鋼の線材をコイルから引き出し、引き出した線材の曲がりを矯正する矯正装置を備え、矯正後の線材を所定の長さで切断して直棒を製造する矯正切断装置では、線材がチタン合金、ＳＵＨ３５、ハイス鋼、Ｎｉ耐熱鋼のような難加工材料の場合は、冷間での矯正が難しい。そこで、難加工材料からなる線材から直棒を製造する場合に、矯正前の線材を温間加工域まで加熱し、該線材を温間で矯正するよう構成した矯正切断装置が提案されている(例えば、特許文献１参照)。 In a straightening and cutting device that pulls out steel wire from a coil and straightens the bends in the pulled wire, and cuts the straightened wire to a specified length to produce straight bars, it is difficult to straighten the wire in a cold state when the wire is made of a difficult-to-process material such as titanium alloy, SUH35, high-speed steel, or Ni heat-resistant steel. Therefore, when producing straight bars from wire made of a difficult-to-process material, a straightening and cutting device has been proposed that is configured to heat the wire before straightening to the warm processing range and straighten the wire in a warm state (see, for example, Patent Document 1).

特開平９－１０８７６２号公報Japanese Patent Application Laid-Open No. 9-108762

特許文献１の矯正切断装置は、矯正機の直前で、常温の線材を誘導加熱装置によって温間加工域まで加熱するよう構成されている。誘導加熱装置を通過する線材には、誘導電流が表面近傍に集中して流れるため、主に表面が加熱されて、線材内部は表面からの熱伝達で加熱される。このことから、線材の中心を温間加工域まで加熱するには、線材の搬送速度を下げてゆっくり加熱するか、あるいは誘導加熱装置として大きな加熱能力のものが必要となり、生産能力が低下したり、装置が大型化したりする難点が指摘される。 The straightening and cutting device in Patent Document 1 is configured to heat the wire at room temperature to the warm processing zone by an induction heating device just before the straightening machine. As the induced current flows concentrated near the surface of the wire passing through the induction heating device, the surface is mainly heated, and the inside of the wire is heated by heat transfer from the surface. For this reason, in order to heat the center of the wire to the warm processing zone, the wire transport speed must be reduced and it must be heated slowly, or an induction heating device with a large heating capacity is required, which has been pointed out as a drawback in that production capacity is reduced and the device becomes larger.

すなわち本発明は、前述した従来技術に内在する前記課題に鑑み、これを好適に解決するべく提案されたものであって、装置の大型化を抑制し得ると共に生産能力を向上することができる線材の矯正装置を提供することを目的とする。 In other words, the present invention has been proposed in consideration of the problems inherent in the above-mentioned conventional technology, and aims to provide a wire straightening device that can prevent the device from becoming too large and improve production capacity.

前記課題を克服し、所期の目的を達成するため、請求項１の発明に係る線材の矯正装置は、
コイル状に巻かれた線材(10)のコイル(11)を支持するコイルスタンド(12)と、該コイルスタンド(12)のコイル(11)から引き出した線材(10)を矯正する矯正機(16)とを備えた線材の矯正装置において、
前記コイルスタンド(12)に支持したコイル(11)を加熱する加熱装置(20)と、
前記コイルスタンド(12)と矯正機(16)との間に配置され、該矯正機(16)に向けて送られる線材(10)を誘導加熱する誘導加熱装置(21)とを備えることを要旨とする。
請求項１の発明では、加熱装置によりコイルを加熱すると共に、矯正機に通す前に再び線材を誘導加熱装置によって加熱するので、誘導加熱装置として加熱能力の小さなものを用いることができ、装置の大型化を抑制することができる。また、加熱装置で加熱された線材が誘導加熱装置に至るまでには中心部より表層域の温度が低下するので、該誘導加熱装置では線材の表層域を主に加熱すればよく、誘導加熱装置を通る際の線材の速度を高めても線材を温間加工域まで加熱することができ、生産能力を向上し得る。 In order to overcome the above problems and achieve the intended object, the wire straightening device according to the present invention comprises:
A wire straightening device including a coil stand (12) for supporting a coil (11) of a wire (10) wound in a coil shape, and a straightener (16) for straightening the wire (10) drawn out from the coil (11) of the coil stand (12),
a heating device (20) for heating the coil (11) supported by the coil stand (12);
The wire straightening machine includes an induction heating device (21) that is disposed between the coil stand (12) and the straightening machine (16) and that induction heats the wire (10) being fed toward the straightening machine (16).
In the invention of claim 1, the coil is heated by the heating device, and the wire is heated again by the induction heating device before passing through the straightener, so that an induction heating device with a small heating capacity can be used, and the size of the device can be suppressed. Also, since the temperature of the surface layer region of the wire heated by the heating device drops from that of the center before it reaches the induction heating device, it is sufficient to mainly heat the surface layer region of the wire with the induction heating device, and the wire can be heated to the warm working region even if the speed of the wire passing through the induction heating device is increased, and production capacity can be improved.

請求項２の発明は、前記誘導加熱装置(21)は、
線材(10)が内側を通過する誘導加熱コイル(25)と、
該誘導加熱コイル(25)と線材(10)との間に位置し、線材(10)が誘導加熱コイル(25)に接触するのを防止する保護部(24b)とを備えることを要旨とする。
請求項２の発明では、線材が誘導加熱コイルに接触して該誘導加熱コイルが損傷等するのを保護部で防止することができる。 The invention of claim 2 is characterized in that the induction heating device (21) is
an induction heating coil (25) through which the wire (10) passes;
The induction heating coil (25) is provided with a protective portion (24b) that is positioned between the induction heating coil (25) and the wire (10) and prevents the wire (10) from contacting the induction heating coil (25).
In the invention of claim 2, the protective portion can prevent the wire from coming into contact with the induction heating coil and causing damage to the induction heating coil.

請求項３の発明は、前記誘導加熱コイル(25)は耐火セメントに埋設されて、該誘導加熱コイル(25)の内側に耐火セメントからなる所定厚みの前記保護部(24b)が位置して、該保護部(24b)の内側を前記線材(10)が通過するよう構成されていることを要旨とする。
請求項３の発明では、誘導加熱コイルを耐火セメントに埋設することで両者が一体化して、耐火セメントからなる保護部による保護強度を高めることができ、太径の線材の接触による損傷等を抑制することができる。 The invention of claim 3 is characterized in that the induction heating coil (25) is embedded in fireproof cement, the protective portion (24b) of a predetermined thickness made of fireproof cement is located inside the induction heating coil (25), and the wire (10) passes inside the protective portion (24b).
In the invention of claim 3, the induction heating coil is embedded in the refractory cement, thereby integrating the two, thereby increasing the protective strength provided by the protective part made of the refractory cement and suppressing damage caused by contact with a thick-diameter wire.

請求項４の発明は、前記誘導加熱装置(21)と矯正機(16)との間に、線材(10)が通過する孔(29a)が形成されたガイド部材(29)を設けたことを要旨とする。
請求項４の発明では、誘導加熱装置を通過した線材をガイド部材で下流側に案内するので、誘導加熱装置を通っている線材が装置内で蛇行等して誘導加熱装置を損傷させるのを抑制することができる。 The invention of claim 4 is characterized in that a guide member (29) having a hole (29a) through which the wire (10) passes is provided between the induction heating device (21) and the straightener (16).
In the invention of claim 4, the wire that has passed through the induction heating device is guided downstream by a guide member, thereby preventing the wire passing through the induction heating device from meandering or otherwise damaging the induction heating device.

請求項５の発明は、前記ガイド部材(29)における孔(29a)の上流部は、該孔(29a)の入口に向かうにつれて径が広がる形状に形成されていることを要旨とする。
請求項５の発明では、誘導加熱装置を通過した線材の端部を、ガイド部材の内部に好適に導くことができる。 The invention according to claim 5 is characterized in that the upstream portion of the hole (29a) in the guide member (29) is formed in a shape whose diameter increases toward the inlet of the hole (29a).
According to the fifth aspect of the present invention, the end of the wire that has passed through the induction heating device can be suitably guided into the guide member.

請求項６の発明は、前記ガイド部材(29)と矯正機(16)との間に、線材(10)が露出する空所(30)を設けたことを要旨とする。
請求項６の発明では、ガイド部材と矯正機との間に空所を設けたので、矯正機でのトラブルによって線材の詰まり等が発生した場合に、誘導加熱装置が損傷するのを防止すると共に、後処理が容易となる。 The present invention has a gist in that a space (30) is provided between the guide member (29) and the straightener (16) so that the wire rod (10) is exposed.
In the invention of claim 6, a space is provided between the guide member and the straightener. This prevents damage to the induction heating device and makes post-processing easier when a problem occurs with the straightener causing the wire to become clogged.

請求項７の発明は、前記誘導加熱装置(21)の上流側に、線材(10)を誘導加熱装置(21)に案内するガイド部材(28)を設けたことを要旨とする。
請求項７の発明では、コイルから引き出される線材を誘導加熱装置に好適に案内することができ、誘導加熱装置を通っている線材が装置内で蛇行等して誘導加熱装置を損傷させるのを抑制することができる。 The invention according to claim 7 is characterized in that a guide member (28) for guiding the wire (10) to the induction heating device (21) is provided upstream of the induction heating device (21).
In the invention of claim 7, the wire pulled out from the coil can be suitably guided to the induction heating device, and the wire passing through the induction heating device can be prevented from meandering or otherwise damaging the induction heating device.

本発明に係る線材の矯正装置によれば、装置の大型化を抑制し得ると共に生産能力を向上することができる。 The wire straightening device of the present invention can prevent the device from becoming too large and improve production capacity.

実施例に係る線材の矯正切断装置を示す概略図である。1 is a schematic diagram showing a wire straightening and cutting device according to an embodiment of the present invention; 実施例に係る矯正切断装置の要部概略平面図である。1 is a schematic plan view of a main part of a straightening and cutting device according to an embodiment. 実施例に係る矯正切断装置を一部切欠いて示す要部概略側面図である。1 is a schematic side view of a main part of a straightening and cutting device according to an embodiment, with a part cut away; 実施例に係る誘導加熱装置の縦断面図である。FIG. 1 is a vertical cross-sectional view of an induction heating device according to an embodiment.

次に、本発明に係る線材の矯正装置につき、好適な実施例を挙げて、添付図面を参照しながら以下説明する。実施例では、矯正装置を備える矯正切断装置の場合で説明する。 Next, a preferred embodiment of the wire straightening device according to the present invention will be described below with reference to the attached drawings. In the embodiment, a straightening cutting device equipped with a straightening device will be described.

図１に示すように、実施例に係る線材の矯正切断装置は、コイル状に巻かれた線材１０のコイル１１を支持するコイルスタンド１２と、コイルスタンド１２に支持されているコイル１１から線材１０を引き出して下流側に送る複数の送り装置１３,１４,１５と、送り装置１３,１４,１５により送られる線材１０を矯正する矯正機１６と、矯正した線材１０を所定の長さに切断する切断機１７と、を備える。送り装置１３,１４,１５は、ピンチローラ１８,１８によって線材１０を挟み込んで下流側に送るよう構成される。矯正切断装置は、３つの送り装置１３,１４,１５を備え、最上流に位置する第１送り装置１３とコイルスタンド１２との間に、コイルスタンド１２から引き出される線材１０のコイルぐせを予備的に矯正する予備矯正機１９が配置される。また、矯正切断装置は、コイルスタンド１２に支持したコイル１１を加熱する加熱装置２０と、コイルスタンド１２と矯正機１６との間に配置され、該矯正機１６に向けて送られる線材１０を誘導加熱する誘導加熱装置２１とを備える。 1, the wire straightening and cutting device according to the embodiment includes a coil stand 12 that supports a coil 11 of a wire 10 wound in a coil shape, a plurality of feeders 13, 14, 15 that pull out the wire 10 from the coil 11 supported by the coil stand 12 and send it downstream, a straightener 16 that straightens the wire 10 sent by the feeders 13, 14, 15, and a cutter 17 that cuts the straightened wire 10 to a predetermined length. The feeders 13, 14, 15 are configured to pinch the wire 10 with pinch rollers 18, 18 and send it downstream. The straightening and cutting device includes three feeders 13, 14, 15, and a preliminary straightener 19 that preliminary straightens the coil curl of the wire 10 pulled out from the coil stand 12 is disposed between the first feeder 13 located at the most upstream position and the coil stand 12. The straightening and cutting device also includes a heating device 20 that heats the coil 11 supported by the coil stand 12, and an induction heating device 21 that is disposed between the coil stand 12 and the straightening machine 16 and that inductively heats the wire 10 being fed toward the straightening machine 16.

前記加熱装置２０は、前記コイルスタンド１２を収容する加熱炉であって、該加熱炉２０によって、前記コイル１１を温間加工域の温度まで加熱し得るよう構成される。なお、加熱炉２０は、必要に応じて移動されてコイルスタンド１２を露出するよう構成される。図１に示す如く、前記第１送り装置１３の下流側に離間して第２送り装置１４が配置され、両送り装置１３,１４の間に、前記誘導加熱装置２１が配置される。また、前記第２送り装置１４の下流側に、前記矯正機１６と、第３送り装置１５と、前記切断機１７とが、この順で配置される。実施例の矯正機１６は、線材１０の送り方向(線材送り方向)に沿う軸回りに回転する本体２２に、線材１０に曲げを与える曲げ部材２３を線材送り方向に離間して複数備え、各曲げ部材２３により線材１０に与える曲げ量を可変可能な回転式の矯正機が用いられる。この矯正機１６では、第２送り装置１４と第３送り装置１５との間を送られる線材１０を、曲げ部材２３によって曲げを与えつつ本体２２を回転することによって矯正する。 The heating device 20 is a heating furnace that houses the coil stand 12, and is configured to heat the coil 11 to a temperature in the warm processing range by the heating furnace 20. The heating furnace 20 is configured to be moved as necessary to expose the coil stand 12. As shown in FIG. 1, the second feed device 14 is arranged at a distance downstream of the first feed device 13, and the induction heating device 21 is arranged between the two feed devices 13 and 14. In addition, the straightener 16, the third feed device 15, and the cutting machine 17 are arranged in this order downstream of the second feed device 14. The straightener 16 of the embodiment is provided with a main body 22 that rotates around an axis along the feed direction (wire feed direction) of the wire 10, and a plurality of bending members 23 that bend the wire 10 are arranged at a distance in the wire feed direction, and a rotary straightener is used that can change the amount of bending given to the wire 10 by each bending member 23. In this straightening machine 16, the wire 10 fed between the second feed device 14 and the third feed device 15 is straightened by rotating the main body 22 while bending it with the bending member 23.

前記誘導加熱装置２１は、図４に示す如く、耐火セメントを材料として所定の肉厚に形成した保護部材２４と、該保護部材２４に埋設された誘導加熱コイル２５とを備え、保護部材２４には、誘導加熱コイル２５の内側に、線材１０が通過する通過孔２４ａが貫通形成されて、該通過孔２４ａを通っている線材１０と誘導加熱コイル２５との間には、耐火セメントからなる所定厚みの保護部２４ｂが存在するよう構成される。なお、誘導加熱コイル２５は、銅を材料とする中空鋼管から構成されて、内部に水を通して冷却可能に構成される。そして、誘導加熱装置２１は、誘導加熱コイル２５に図示しない加熱電源から電流を供給し、通過孔２４ａを通過する線材１０を誘導加熱する。誘導加熱装置２１での線材１０の加熱温度は、加熱対象となる線材１０の材質に応じた温間加工域となるよう電流の周波数が設定される。なお、温間加工域は、矯正機１６による矯正が可能な下限温度と、矯正によって塑性変形してしまわない上限温度との間に設定された温度域であって、該温間加工域は、線材１０の材質に応じて設定される。温間加工域は、例えば、線材１０の抗張力が、２５ｋｇｆ／ｍｍ2以上となる温度域に設定される。 As shown in Fig. 4, the induction heating device 21 includes a protective member 24 made of refractory cement and formed to a predetermined thickness, and an induction heating coil 25 embedded in the protective member 24. The protective member 24 is formed with a through hole 24a through which the wire 10 passes inside the induction heating coil 25, and a protective part 24b of a predetermined thickness made of refractory cement is present between the wire 10 passing through the through hole 24a and the induction heating coil 25. The induction heating coil 25 is made of a hollow steel pipe made of copper and is configured so that it can be cooled by passing water through the inside. The induction heating device 21 supplies a current from a heating power source (not shown) to the induction heating coil 25 to induction heat the wire 10 passing through the through hole 24a. The frequency of the current is set so that the heating temperature of the wire 10 in the induction heating device 21 is in a warm working range according to the material of the wire 10 to be heated. The warm working range is a temperature range set between the lower limit temperature at which straightening by the straightener 16 is possible and the upper limit temperature at which plastic deformation does not occur due to straightening, and is set according to the material of the wire rod 10. For example, the warm working range is set to a temperature range at which the tensile strength of the wire rod 10 is 25 kgf/ mm2 or more.

ここで、誘導加熱では、加熱対象となる素材内に発生する誘導電流からのジュール熱によって素材が加熱される。また、使用する電流の周波数帯によって、渦電流の浸透深さ(熱入り深さ)が異なり、実施例では、線材１０の表層域を加熱することができる周波数帯、例えば４０ｋＨｚの周波数の電流が使用される。４０ｋＨｚの周波数の電流を誘導加熱コイル２５に供給した場合、直径が１２～１９ｍｍの線材１０では、浸透深さは２～３ｍｍとなる。 In induction heating, the material is heated by Joule heat from induced current generated within the material to be heated. The penetration depth (heat depth) of the eddy current also varies depending on the frequency band of the current used, and in the embodiment, a current of a frequency band capable of heating the surface region of the wire 10, for example a frequency of 40 kHz, is used. When a current of a frequency of 40 kHz is supplied to the induction heating coil 25, the penetration depth is 2 to 3 mm for a wire 10 with a diameter of 12 to 19 mm.

実施例の矯正切断装置は、線材１０を冷間で矯正－切断処理する場合に、前記誘導加熱装置２１を、前記第１送り装置１３と第２送り装置１４との間の線材パスラインＰＬから退避し得るよう構成される。具体的に、図２、図３に示す如く、誘導加熱装置２１は、線材１０の線材送り方向と交差する横方向に移動可能な台車２６に配設されており、該台車２６を横移動することで誘導加熱装置２１を、前記線材パスラインＰＬに前記通過孔２４ａが整列する加熱位置と、該線材パスラインＰＬから離間する退避位置とに位置決め可能に構成される。台車２６に対して誘導加熱装置２１の前記保護部材２４は、位置決め手段２７によって位置決め固定されて、通過孔２４ａを通っている線材１０が蛇行して保護部材２４に接触しても位置ズレしないよう構成される。 The straightening and cutting device of the embodiment is configured so that the induction heating device 21 can be withdrawn from the wire rod pass line PL between the first feed device 13 and the second feed device 14 when the wire rod 10 is subjected to cold straightening and cutting. Specifically, as shown in Figs. 2 and 3, the induction heating device 21 is disposed on a carriage 26 that can move laterally in a direction intersecting with the wire rod feed direction of the wire rod 10, and the induction heating device 21 can be positioned at a heating position where the passing hole 24a is aligned with the wire rod pass line PL and at a withdrawal position away from the wire rod pass line PL by moving the carriage 26 laterally. The protective member 24 of the induction heating device 21 is positioned and fixed with respect to the carriage 26 by a positioning means 27, so that the position does not shift even if the wire rod 10 passing through the passing hole 24a meanders and comes into contact with the protective member 24.

図２、図３に示す如く、前記台車２６には、前記誘導加熱装置２１の上流側に、前記第１送り装置１３から送り出される線材１０を誘導加熱装置２１の前記通過孔２４ａに向けて案内する案内孔(孔)２８ａを有する第１のガイド部材２８に設けられる。第１のガイド部材２８は、直線パイプ状の直線部２８ｂと、該直線部２８ｂの上流部に設けられた導入部２８ｃとから構成され、該導入部２８ｃおよび直線部２８ｂに亘って案内孔２８ａが貫通形成されている。第１のガイド部材２８の案内孔２８ａにおける上流部である導入部２８ｃに臨む部分は、案内孔２８ａの入口に向かうにつれて径が広がる漏斗状に形成される。また、前記台車２６には、前記誘導加熱装置２１の下流側に、該誘導加熱装置２１を通過した線材１０を前記第２送り装置１４のピンチローラ１８,１８に間に向けて案内する案内孔(孔)２９ａを有する第２のガイド部材２９が設けられる。第２のガイド部材２９は、直線パイプ状の直線部２９ｂと、該直線部２９ｂの上流部に設けられた導入部２９ｃとから構成され、該導入部２９ｃおよび直線部２９ｂに亘って案内孔２９ａが貫通形成されている。第２のガイド部材２９の案内孔２９ａにおける上流部である導入部２９ｃに臨む部分は、案内孔２９ａの入口に向かうにつれて径が広がる漏斗状に形成される。第１および第２のガイド部材２８,２９は、その直線部２８ｂ,２９ｂに臨む案内孔２８ａ,２９ａが、前記保護部材２４の通過孔２４ａと、前記線材パスラインＰＬに沿って整列するように配置される。 2 and 3, the carriage 26 is provided with a first guide member 28 having a guide hole (hole) 28a on the upstream side of the induction heating device 21, which guides the wire 10 fed from the first feed device 13 toward the through hole 24a of the induction heating device 21. The first guide member 28 is composed of a straight pipe-shaped straight section 28b and an introduction section 28c provided in the upstream part of the straight section 28b, and the guide hole 28a is formed through the introduction section 28c and the straight section 28b. The part of the first guide member 28 facing the introduction section 28c, which is the upstream part of the guide hole 28a, is formed in a funnel shape whose diameter increases toward the entrance of the guide hole 28a. In addition, the carriage 26 is provided with a second guide member 29 on the downstream side of the induction heating device 21, the second guide member 29 having a guide hole (hole) 29a for guiding the wire 10 that has passed through the induction heating device 21 toward the pinch rollers 18, 18 of the second feed device 14. The second guide member 29 is composed of a straight pipe-shaped straight section 29b and an introduction section 29c provided in the upstream section of the straight section 29b, and the guide hole 29a is formed through the introduction section 29c and the straight section 29b. The portion of the guide hole 29a of the second guide member 29 facing the introduction section 29c, which is the upstream section, is formed in a funnel shape whose diameter increases toward the entrance of the guide hole 29a. The first and second guide members 28, 29 are arranged so that the guide holes 28a, 29a facing the straight sections 28b, 29b are aligned with the passage hole 24a of the protective member 24 along the wire pass line PL.

前記台車２６には、前記誘導加熱装置２１を退避位置に位置決めした状態で、前記線材パスラインＰＬに整列する位置に、線材１０を案内する冷間用ガイド部材３１が配設されている。図２に示す如く、冷間用ガイド部材３１は、直線パイプ状の直線部３１ｂと、該直線部３１ｂの上流部に設けられた導入部３１ｃとから構成され、該導入部３１ｃおよび直線部３１ｂに亘って線材１０を案内する案内孔３１ａが貫通形成されている。冷間用ガイド部材３１の案内孔３１ａにおける上流部である導入部３１ｃに臨む部分は、案内孔３１ａの入口に向かうにつれて径が広がる漏斗状に形成される。 A cold guide member 31 for guiding the wire rod 10 is disposed on the carriage 26 in a position aligned with the wire rod pass line PL with the induction heating device 21 positioned at the retracted position. As shown in FIG. 2, the cold guide member 31 is composed of a straight pipe-shaped straight section 31b and an introduction section 31c provided at the upstream section of the straight section 31b, and a guide hole 31a for guiding the wire rod 10 is formed through the introduction section 31c and the straight section 31b. The portion of the guide hole 31a of the cold guide member 31 facing the introduction section 31c, which is the upstream section, is formed in a funnel shape with a diameter that increases toward the entrance of the guide hole 31a.

図２に示す如く、前記冷間用ガイド部材３１の直線部３１ｂは、前記台車２６から線材送り方向の下流側に所定長さで延出し、該冷間用ガイド部材３１の下流端は、前記退避位置において前記第２送り装置１４の上流端に近接するよう構成される。これに対し、前記第２のガイド部材２９の下流端は、冷間用ガイド部材３１の下流端より線材送り方向の上流側、具体的には台車２６から延出しないように位置し、前記加熱位置において第２のガイド部材２９の下流端は、第２送り装置１４の上流端から所定長さだけ上流側に離間位置するよう構成される。すなわち、第２のガイド部材２９と第２送り装置１４との間に、冷間用ガイド部材３１と第２送り装置１４との間の隙間より長く線材１０が露出する空所３０が設けられている。この空所３０の線材送り方向の長さは、矯正機１６での矯正トラブル等によって線材１０が第２送り装置１４や矯正機１６に送れなくなってしまった場合に、第１送り装置１３から送られる線材１０の変形を可能とすると共に、トラブル後の作業者による後処理を容易に行い得る長さに設定される。 2, the straight portion 31b of the cold guide member 31 extends from the carriage 26 downstream in the wire feed direction by a predetermined length, and the downstream end of the cold guide member 31 is configured to be close to the upstream end of the second feed device 14 in the retracted position. In contrast, the downstream end of the second guide member 29 is located upstream of the downstream end of the cold guide member 31 in the wire feed direction, specifically, so as not to extend from the carriage 26, and the downstream end of the second guide member 29 is configured to be located upstream a predetermined length from the upstream end of the second feed device 14 in the heating position. That is, between the second guide member 29 and the second feed device 14, a void 30 is provided in which the wire 10 is exposed longer than the gap between the cold guide member 31 and the second feed device 14. The length of this space 30 in the wire feed direction is set to a length that allows deformation of the wire 10 fed from the first feed device 13 in the event that the wire 10 cannot be fed to the second feed device 14 or the straightener 16 due to a straightening problem in the straightener 16, and allows the worker to easily perform post-processing after the problem occurs.

〔実施例の作用〕
次に、前述のように構成された実施例の矯正切断装置の作用につき説明する。
前記コイルスタンド１２に支持されているコイル１１は、前記加熱炉２０によって温間加工域まで加熱される。そして、加熱されたコイル１１から前記送り装置１３,１４,１５により引き出される線材１０が、前記予備矯正機１９によって予備矯正される。このときの線材１０は、温間加工域まで加熱されているので、予備矯正を好適に行うことができる。予備矯正後の線材１０は、前記加熱位置に位置決めされている前記誘導加熱装置２１を通り、再加熱された後に前記矯正機１６に送られる。予備矯正機１９を経た線材１０を誘導加熱装置２１によって再加熱するので、温間加工域まで加熱された線材１０を矯正機１６によって好適に矯正できる。そして、矯正後の線材１０は、前記切断機１７によって所定長さで切断される。 [Function of the embodiment]
Next, the operation of the straightening and cutting device of the embodiment constructed as described above will be described.
The coil 11 supported by the coil stand 12 is heated to the warm working region by the heating furnace 20. Then, the wire rod 10 drawn from the heated coil 11 by the feeding devices 13, 14, 15 is pre-straightened by the preliminary straightening machine 19. At this time, the wire rod 10 is heated to the warm working region, so that the preliminary straightening can be performed suitably. The wire rod 10 after the preliminary straightening passes through the induction heating device 21 positioned at the heating position, is reheated, and is then sent to the straightening machine 16. Since the wire rod 10 that has passed through the preliminary straightening machine 19 is reheated by the induction heating device 21, the wire rod 10 heated to the warm working region can be suitably straightened by the straightening machine 16. Then, the straightened wire rod 10 is cut to a predetermined length by the cutting machine 17.

前記誘導加熱装置２１は、図４に示す如く、前記誘導加熱コイル２５が耐火セメントからなる保護部材２４に埋設されて、誘導加熱コイル２５と、前記通過孔２４ａを通る線材１０との間には所定厚みの保護部２４ｂが存在しているので、線材１０が蛇行したとしても、該保護部２４ｂによって線材１０が誘導加熱コイル２５に直接接触するのは防止され、誘導加熱コイル２５に線材１０が接触して損傷等するのを防ぐことができる。また、誘導加熱装置２１は、誘導加熱コイル２５を保護部材２４に埋設する構造としたので、誘導加熱コイル２５と保護部材２４とが一体化して該保護部材２４による保護強度は高くなり、太径の線材１０の接触による損傷等を効果的に抑えることができる。また、誘導加熱装置２１の上流側に第１のガイド部材２８を配置すると共に、下流側に第２のガイド部材２９を配置して線材１０を案内するよう構成したので、誘導加熱装置２１の通過孔２４ａを通っている線材１０が大きく蛇行するのを抑制することができ、該線材１０が保護部材２４に接触して該保護部材２４や誘導加熱コイル２５が損傷等するのを抑制することができる。 As shown in Figure 4, the induction heating device 21 has the induction heating coil 25 embedded in a protective member 24 made of fireproof cement, and a protective portion 24b of a predetermined thickness is present between the induction heating coil 25 and the wire 10 passing through the through hole 24a. Even if the wire 10 meanders, the protective portion 24b prevents the wire 10 from directly contacting the induction heating coil 25, and prevents the wire 10 from contacting the induction heating coil 25 and being damaged. In addition, since the induction heating device 21 has a structure in which the induction heating coil 25 is embedded in the protective member 24, the induction heating coil 25 and the protective member 24 are integrated, increasing the protective strength of the protective member 24, and effectively suppressing damage caused by contact with a large diameter wire 10. In addition, a first guide member 28 is arranged upstream of the induction heating device 21, and a second guide member 29 is arranged downstream to guide the wire 10. This prevents the wire 10 passing through the through hole 24a of the induction heating device 21 from meandering too much, and prevents the wire 10 from coming into contact with the protective member 24, which could cause damage to the protective member 24 or the induction heating coil 25.

前記第１のガイド部材２８の案内孔２８ａは、入口から下流側に向かうにつれて径が小さくなる漏斗状に形成されているので、前記第１送り装置１３から送り出される線材１０の端部を、案内孔内に好適に導くことができる。また、前記第２のガイド部材２９の案内孔２９ａは、入口から下流側に向かうにつれて径が小さくなる漏斗状に形成されているので、前記誘導加熱装置２１を通過した線材１０の端部を、案内孔内に好適に導くことができる。すなわち、各ガイド２８,２９に最初に線材１０を通す作業が容易となる。また、第２のガイド部材２９の長い直線部２９ｂを線材１０が通ることで、該線材１０を前記第２送り装置１４におけるピンチローラ１８,１８の間に好適に案内することができる。 The guide hole 28a of the first guide member 28 is formed in a funnel shape with a diameter that decreases from the entrance to the downstream side, so that the end of the wire 10 sent out from the first feed device 13 can be suitably guided into the guide hole. The guide hole 29a of the second guide member 29 is also formed in a funnel shape with a diameter that decreases from the entrance to the downstream side, so that the end of the wire 10 that has passed through the induction heating device 21 can be suitably guided into the guide hole. That is, the work of first passing the wire 10 through each guide 28, 29 becomes easy. In addition, the wire 10 passes through the long straight portion 29b of the second guide member 29, so that the wire 10 can be suitably guided between the pinch rollers 18, 18 in the second feed device 14.

実施例の矯正切断装置は、前記コイルスタンド１２で支持されている前記コイル１１を、予め温間加工域まで加熱しているので、前記予備矯正機１９および第１送り装置１３を経て前記誘導加熱装置２１に供給される際の線材１０の温度は、温間加工域より低いものの、常温よりは高く、該線材１０を速い速度で誘導加熱装置２１に通過させても充分に温間加工域まで再加熱することができる。すなわち、線材１０が誘導加熱装置２１を通過する速度を高く設定することができ、生産能力を向上し得る。また、誘導加熱装置２１として加熱能力の小さなものを用いることができ、装置の大型化を抑制することができる。 In the straightening and cutting device of the embodiment, the coil 11 supported by the coil stand 12 is heated to the warm processing range in advance, so that the temperature of the wire 10 when it is supplied to the induction heating device 21 via the preliminary straightener 19 and the first feed device 13 is lower than the warm processing range but higher than room temperature, and the wire 10 can be sufficiently reheated to the warm processing range even if it is passed through the induction heating device 21 at a high speed. In other words, the speed at which the wire 10 passes through the induction heating device 21 can be set high, and production capacity can be improved. In addition, an induction heating device 21 with a small heating capacity can be used, which prevents the device from becoming too large.

ここで、前記コイルスタンド１２のコイル１１から引き出されて前記誘導加熱装置２１に至るまでの線材１０の温度低下は、中心部より表層域が大きくなる。また、矯正機１６による線材１０の矯正時には、線材１０の表層域に大きな応力が加わることから、矯正時には線材１０の表層域の温度が高いことが望ましい。そこで、実施例の誘導加熱装置２１は、線材１０に対して渦電流の浸透深さが浅い周波数帯の電流を誘導加熱コイル２５に供給して、線材１０の表層域を効果的に加熱するよう構成してある。これにより、誘導加熱装置２１によって線材１０の表層域の温度を、温間加工域内で高い温度にして線材１０を矯正機１６の送り込むことができ、矯正機１６での矯正が容易となる。また、誘導加熱装置２１では線材１０の表層域を主に加熱するので、加熱時間の短縮にも寄与することができる。 Here, the temperature drop of the wire 10 from the coil 11 of the coil stand 12 to the induction heating device 21 is greater in the surface region than in the center. In addition, when the wire 10 is straightened by the straightener 16, a large stress is applied to the surface region of the wire 10, so it is desirable that the temperature of the surface region of the wire 10 is high during straightening. Therefore, the induction heating device 21 of the embodiment is configured to supply a current of a frequency band in which the penetration depth of eddy currents in the wire 10 is shallow to the induction heating coil 25, so that the surface region of the wire 10 is effectively heated. As a result, the induction heating device 21 can raise the temperature of the surface region of the wire 10 to a high temperature within the warm processing range, and the wire 10 can be fed into the straightener 16, making straightening by the straightener 16 easier. In addition, the induction heating device 21 mainly heats the surface region of the wire 10, which can also contribute to shortening the heating time.

矯正切断装置では、前記矯正機１６での矯正トラブルによって、矯正機内で線材１０が破断して詰まってしまうことがあり、該トラブルの発生時には送り装置１３,１４,１５の送りを停止するものの、トラブル発生から送り装置１３,１４,１５を停止するまでの間には、所定長さの線材１０の送りは行われる。このような場合は、第２送り装置１４や矯正機１６の内部で線材１０が詰まっている状態で、前記第１送り装置１３により強制的に線材１０が送られることで、該線材１０が誘導加熱装置２１の内部で変形して前記保護部材２４や誘導加熱コイル２５を損傷させてしまうおそれがある。実施例の矯正切断装置では、前記第２のガイド部材２９と第２送り装置１４との間に空所３０を設けているので、前記トラブルの発生時に第２送り装置１４や矯正機１６で線材１０が詰まってしまった場合に、上流側から送られる線材１０は抵抗のない空所３０において変形し、誘導加熱装置２１の内部での線材１０の変形を防ぐことができる。すなわち、トラブルに起因する線材１０の変形によって保護部材２４や誘導加熱コイル２５が損傷するのを防止することができる。また、空所３０があることによって、詰まってしまった線材１０を空所３０のところで切断して除去することができ、トラブル後の処理が容易となる。 In the straightening and cutting device, a straightening trouble in the straightener 16 may cause the wire 10 to break and become stuck in the straightener. When the trouble occurs, the feeding devices 13, 14, and 15 are stopped, but a predetermined length of wire 10 is fed between the trouble and the stop of the feeding devices 13, 14, and 15. In such a case, when the wire 10 is stuck inside the second feeding device 14 or the straightener 16, the wire 10 is forcibly fed by the first feeding device 13, which may cause the wire 10 to deform inside the induction heating device 21 and damage the protective member 24 and the induction heating coil 25. In the straightening and cutting device of the embodiment, a void 30 is provided between the second guide member 29 and the second feeding device 14, so that when the wire 10 becomes stuck in the second feeding device 14 or the straightener 16 when the trouble occurs, the wire 10 fed from the upstream side is deformed in the void 30 where there is no resistance, and deformation of the wire 10 inside the induction heating device 21 can be prevented. That is, it is possible to prevent damage to the protective member 24 and the induction heating coil 25 due to deformation of the wire 10 caused by a problem. In addition, the presence of the void 30 allows the clogged wire 10 to be cut and removed at the void 30, making it easier to deal with the problem after it occurs.

実施例の矯正切断装置は、線材１０を冷間で矯正－切断処理する場合、前記台車２６を移動して誘導加熱装置２１を退避位置に位置決めすることで、前記冷間用ガイド部材３１が、前記第１送り装置１３と第２送り装置１４との間において、前記線材パスラインＰＬに整列するように位置決めされる。従って、前記コイルスタンド１２で支持されたコイル１１から引き出された線材１０は、冷間用ガイド部材３１によって第２送り装置１４のピンチローラ１８,１８の間に好適に案内される。なお、冷間で線材１０を処理する場合は、前記加熱炉２０でのコイル１１の加熱は行わない。 When the straightening and cutting device of the embodiment performs cold straightening and cutting of the wire 10, the carriage 26 is moved to position the induction heating device 21 in a retracted position, so that the cold guide member 31 is positioned so as to be aligned with the wire pass line PL between the first feed device 13 and the second feed device 14. Therefore, the wire 10 drawn out from the coil 11 supported by the coil stand 12 is suitably guided between the pinch rollers 18, 18 of the second feed device 14 by the cold guide member 31. Note that when processing the wire 10 in a cold state, the coil 11 is not heated in the heating furnace 20.

〔変更例〕
本願は、前述した実施例の構成に限定されるものでなく、その他の構成を適宜に採用することができる。
１． 実施例では、矯正機の下流側に切断機を配設した矯正切断装置の場合で説明したが、矯正機によって矯正された線材を、別工程に供給する矯正装置であってもよい。
２． 実施例では、誘導加熱コイルの全体を耐火セメントに埋設したが、内側を通過する線材が誘導加熱コイルに接触することのない隙間だけ離間して、誘導加熱コイルを部分的に埋設した複数の耐火セメントからなる保護部材を線材送り方向に不連続で配置する構成を採用することができる。
３． 実施例では、誘導加熱コイルを耐火セメントからなる保護部材に埋設したが、誘導コイルの内側に保護部としてのシリコンパイプを配置すると共に、耐火レンガ等の耐火物で誘導加熱コイルを径方向から挟んで位置決め固定する構成を採用することができる。
４．誘導加熱コイルの内側に配置される耐火セメントやシリコンパイプなどの保護部は、周方向に連続する筒状である必要はなく、該保護部の内側を通過する線材が誘導加熱コイルに接触することのない隙間だけ離間するブロック状のものであってもよい。
５．コイルを加熱する加熱装置は、加熱炉に限らず、その他各種の加熱装置を採用することができる。
６．実施例では、誘導加熱装置と矯正機との間に第２送り装置を配置したが、該第２送り装置を省略し、誘導加熱装置と矯正機との間に第２のガイド部材を配置し、該第２のガイド部材と矯正機との間に線材が露出する空所を設ける構成を採用することができる。
７． 矯正機としては、回転式に限らず、公知の各種方式の矯正機を採用することができる。 [Example of change]
The present application is not limited to the configurations of the above-described embodiments, and other configurations can be appropriately adopted.
1. In the embodiment, the straightening and cutting device in which the cutter is disposed downstream of the straightener is described, but the straightening device may supply the wire straightened by the straightener to another process.
2. In the embodiment, the entire induction heating coil is embedded in the refractory cement, but it is also possible to adopt a configuration in which a plurality of protective members made of refractory cement in which induction heating coils are partially embedded are arranged discontinuously in the wire feed direction, separated by a gap so that the wire passing inside does not come into contact with the induction heating coil.
3. In the embodiment, the induction heating coil is embedded in a protective member made of fireproof cement, but it is also possible to employ a configuration in which a silicon pipe is placed inside the induction coil as a protective part, and the induction heating coil is positioned and fixed by being sandwiched radially between refractory materials such as fireproof bricks.
4. The protective part such as refractory cement or a silicon pipe arranged inside the induction heating coil does not need to be a cylindrical part that continues in the circumferential direction, but may be a block-like part that is separated by a gap so that the wire passing inside the protective part does not come into contact with the induction heating coil.
5. The heating device for heating the coil is not limited to a heating furnace, and various other heating devices can be used.
6. In the embodiment, the second feed device is disposed between the induction heating device and the straightening machine, but it is also possible to adopt a configuration in which the second feed device is omitted, a second guide member is disposed between the induction heating device and the straightening machine, and a void is provided between the second guide member and the straightening machine in which the wire is exposed.
7. The straightening machine is not limited to a rotary type, and various types of known straightening machines can be used.

１０ 線材，１１ コイル，１２ コイルスタンド，１６ 矯正機
２０ 加熱炉(加熱装置)，２１ 誘導加熱装置，２４ｂ 保護部，２５ 誘導加熱コイル
２８ 第１のガイド部材，２９ 第２のガイド部材，２９ａ 案内孔(孔)，３０ 空所 REFERENCE SIGNS LIST 10 wire rod, 11 coil, 12 coil stand, 16 straightener, 20 heating furnace (heating device), 21 induction heating device, 24b protective part, 25 induction heating coil, 28 first guide member, 29 second guide member, 29a guide hole (hole), 30 void

Claims (7)

コイル状に巻かれた線材のコイルを支持するコイルスタンドと、該コイルスタンドのコイルから引き出した線材を矯正する矯正機とを備えた線材の矯正装置において、
前記コイルスタンドに支持したコイルを加熱する加熱装置と、
前記コイルスタンドと矯正機との間に配置され、該矯正機に向けて送られる線材を誘導加熱する誘導加熱装置とを備える
ことを特徴とする線材の矯正装置。 A wire straightening device including a coil stand for supporting a coil of a wire wound in a coil shape and a straightener for straightening the wire drawn out from the coil of the coil stand,
a heating device for heating the coil supported by the coil stand;
a wire straightening device arranged between the coil stand and the straightening machine, for induction heating the wire being fed toward the straightening machine; 前記誘導加熱装置は、
線材が内側を通過する誘導加熱コイルと、
該誘導加熱コイルと線材との間に位置し、線材が誘導加熱コイルに接触するのを防止する保護部とを備える請求項１記載の線材の矯正装置。 The induction heating device is
an induction heating coil through which a wire passes;
2. The wire straightening device according to claim 1, further comprising a protective portion positioned between the induction heating coil and the wire to prevent the wire from contacting the induction heating coil. 前記誘導加熱コイルは耐火セメントに埋設されて、該誘導加熱コイルの内側に耐火セメントからなる所定厚みの前記保護部が位置して、該保護部の内側を前記線材が通過するよう構成されている請求項２記載の線材の矯正装置。 The wire straightening device according to claim 2, wherein the induction heating coil is embedded in refractory cement, the protective part of a predetermined thickness made of refractory cement is positioned inside the induction heating coil, and the wire passes inside the protective part. 前記誘導加熱装置と矯正機との間に、線材が通過する孔が形成されたガイド部材を設けた請求項１～３の何れか一項に記載の線材の矯正装置。 A wire straightening device according to any one of claims 1 to 3, in which a guide member having a hole through which the wire passes is provided between the induction heating device and the straightening machine. 前記ガイド部材における孔の上流部は、該孔の入口に向かうにつれて径が広がる形状に形成されている請求項４記載の線材の矯正装置。 The wire straightening device according to claim 4, wherein the upstream portion of the hole in the guide member is formed in a shape whose diameter increases toward the entrance of the hole. 前記ガイド部材と矯正機との間に、線材が露出する空所を設けた請求項４または５記載の線材の矯正装置。 A wire straightening device according to claim 4 or 5, in which a gap is provided between the guide member and the straightening machine, through which the wire is exposed. 前記誘導加熱装置の上流側に、線材を誘導加熱装置に案内するガイド部材を設けた請求項１～６の何れか一項に記載の線材の矯正装置。 A wire straightening device according to any one of claims 1 to 6, in which a guide member for guiding the wire to the induction heating device is provided upstream of the induction heating device.
JP2020137378A 2020-08-17 2020-08-17 Wire rod straightening device Active JP7484555B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2020137378A JP7484555B2 (en) 2020-08-17 2020-08-17 Wire rod straightening device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2020137378A JP7484555B2 (en) 2020-08-17 2020-08-17 Wire rod straightening device

Publications (2)

Publication Number Publication Date
JP2022033473A JP2022033473A (en) 2022-03-02
JP7484555B2 true JP7484555B2 (en) 2024-05-16

Family

ID=80375291

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2020137378A Active JP7484555B2 (en) 2020-08-17 2020-08-17 Wire rod straightening device

Country Status (1)

Country Link
JP (1) JP7484555B2 (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006320919A (en) 2005-05-17 2006-11-30 Osawa Eng Co Ltd Device for straightening lead wire

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006320919A (en) 2005-05-17 2006-11-30 Osawa Eng Co Ltd Device for straightening lead wire

Also Published As

Publication number Publication date
JP2022033473A (en) 2022-03-02

Similar Documents

Publication Publication Date Title
JP5612858B2 (en) Method and apparatus for introducing a cored wire into a molten metal bath
RU2518867C1 (en) Regenerative turn forming unit
JP4708508B1 (en) Fully automatic pipe bender
EP2857119B1 (en) Tube expanding method for manufacturing metal tube
JP6860344B2 (en) Annealing furnace and method for annealing steel strands
JP7484555B2 (en) Wire rod straightening device
JP2016155162A (en) Coiling machine and manufacturing method of coil spring
JP2009241088A (en) Punching method of high silicon steel strip and punching equipment
KR100716374B1 (en) Device and method for bending mg alloy pipe
CN110049833B (en) Method and apparatus for manufacturing metal component
WO2004092424A1 (en) Heat treating method for steel wire
JP7299488B2 (en) Metal heat treatment method and heat treatment apparatus
JP2015100829A (en) Method and equipment for steel tube expansion processing
JPS6127133A (en) Warm forming method of coil spring
JP6793948B2 (en) Pipe bending device
JPH0710816Y2 (en) Coil spring warm forming equipment
JP2018115374A (en) Manufacturing method for hardened steel wire having high straightness
JP4038541B2 (en) Heat treatment method for steel wire
JPH0892657A (en) Production of prehardened steel bar and apparatus for producing the same
JPS6015082A (en) Production of hot electric welded steel pipe
JP2023097560A (en) High frequency heating coil and coil spring molding device
KR20110034356A (en) Roller for hot rolling mill
KR20130048391A (en) Apparatus for injecting metal wire intomolten metal
JP2000140910A (en) Manufacture of seamless pipe and device therefor
KR100871757B1 (en) In line annealing apparatus for ultrafine microfiber

Legal Events

Date Code Title Description
A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20230616

A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20240314

TRDD Decision of grant or rejection written
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20240402

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20240415

R150 Certificate of patent or registration of utility model

Ref document number: 7484555

Country of ref document: JP

Free format text: JAPANESE INTERMEDIATE CODE: R150