JP3119280B2 - Heated honeycomb structure - Google Patents

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【０００１】[0001]

【産業上の利用分野】本発明は，排気ガス浄化用触媒担
体，ディーゼルパティキュレートのトラッパなどに用い
る，渦巻き状の加熱式ハニカム構造体に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a spiral-shaped heated honeycomb structure used for a catalyst carrier for purifying exhaust gas, a trapper for diesel particulates, and the like.

【０００２】[0002]

【従来技術】例えば，自動車の排気浄化に用いるヒータ
触媒，そのスタートアップヒータ，ディーゼルエンジン
の排気中のパティキュレートを捕集するためのトラッパ
においては，平板と波板とを渦巻き状に巻回したハニカ
ム構造体が用いられている（例えば，特開平２−２２３
６２２号，特開平３−３２９２３号）。これらハニカム
構造体は，薄肉の材料を用いて，容易に通気性のコルゲ
ート構造体（後述の図５，６参照）に製造できる点で優
れている。2. Description of the Related Art For example, in a heater catalyst used for purifying exhaust gas from an automobile, a startup heater thereof, and a trapper for collecting particulates in exhaust gas of a diesel engine, a honeycomb in which a flat plate and a corrugated plate are spirally wound. A structure is used (for example, see Japanese Unexamined Patent Publication No.
622, JP-A-3-32923). These honeycomb structures are excellent in that they can be easily manufactured into a gas-permeable corrugated structure (see FIGS. 5 and 6 described later) using a thin material.

【０００３】[0003]

【解決しようとする課題】ところで，上記ヒータ触媒，
スタートアップ用ヒータ，トラッパは，触媒層を高温に
したり，捕集したパティキュレートを燃焼除去させるた
め，約３５０〜１０００℃に通電加熱される。それ故，
ハニカム構造体は，その長期使用中において上記加熱の
繰り返しにより，ハニカム構造体の中心部分が前方ある
いは後方へ少しづつ突出していくという，スコーピング
を生ずることがある。つまり，平板と波板の相互間にズ
レを生じて，ハニカム構造体の軸方向へのズレを生ず
る。The above-mentioned heater catalyst,
The start-up heater and trapper are electrically heated to about 350 to 1000 ° C. in order to raise the temperature of the catalyst layer or burn and remove the collected particulates. Therefore,
During the long-term use of the honeycomb structure, scoping may occur due to the repetition of the heating, in which the central portion of the honeycomb structure gradually projects forward or backward. That is, a displacement occurs between the flat plate and the corrugated plate, thereby causing a displacement in the axial direction of the honeycomb structure.

【０００４】そこで，図１５に示すごとく，中心電極４
１に巻回した平板２１〜２４と，波板３１〜３４と，こ
れらの外周に配置した外筒電極４２とよりなり，外筒電
極方向と直角方向に多数のガス通路９０とを有する加熱
式ハニカム構造体９において，ガス通路９０の入口端９
１と出口端９２の両方において平板２１〜２４と波板３
１〜３４とを溶接部９５により接合することも考えられ
る。Therefore, as shown in FIG.
A heating type comprising flat plates 21 to 24 wound around 1, corrugated plates 31 to 34, and an outer cylinder electrode 42 arranged on the outer periphery thereof, and having a number of gas passages 90 in a direction perpendicular to the outer cylinder electrode direction. In the honeycomb structure 9, the inlet end 9 of the gas passage 90
1 and the exit end 92, the flat plates 21 to 24 and the corrugated plate 3
It is also conceivable to join 1 to 34 with a weld 95.

【０００５】この場合にはスコーピングを防止できる。
しかし，この場合は上記入口端９１と出口端９２の両端
面において，平板２１〜２４と波板３１〜３４とが溶接
により接合されている。そのため，ハニカム構造体９の
加熱に当たって，中心電極４１と外筒電極４２との間に
電圧を印加したとき，その電流は平板及び波板の両端の
接合部９５を直線状に流れてしまう。そのため，平板又
は波板の内部に電流が流れずハニカム構造体が加熱され
なくなってしまう。In this case, scoping can be prevented.
However, in this case, the flat plates 21 to 24 and the corrugated plates 31 to 34 are joined by welding at both end surfaces of the inlet end 91 and the outlet end 92. Therefore, when a voltage is applied between the center electrode 41 and the outer cylindrical electrode 42 in heating the honeycomb structure 9, the current flows straight through the joints 95 at both ends of the flat plate and the corrugated plate. Therefore, no current flows inside the flat plate or corrugated plate, and the honeycomb structure is not heated.

【０００６】そこで，これに対応するため，平板を波板
よりも予め突出させておき，両者の巻回時平板の突出部
を波板方向に折曲すると共に両者を抵抗溶接し，両者を
一体化することが提案されている（特開平１−２４２１
５３号公報）。また，巻回した平板と波板において，そ
のガス通路の入口端における波板の山部又は谷部のいず
れか一方を平板と周方向において連続的に接合し，ガス
通路の出口端における波板の上記接合と異なるサイドの
谷部又は山部を，他の平板と周方向に連続的に接合する
ことが提案されている（特開平３−８６２４４号公
報）。To cope with this, the flat plate is made to protrude from the corrugated plate in advance, and when the two are wound, the protruding portions of the flat plate are bent in the corrugated plate direction, and the two are resistance-welded to join the two. (Japanese Patent Laid-Open No. 1-2421)
No. 53). In the wound flat plate and corrugated plate, one of the peaks and valleys of the corrugated plate at the inlet end of the gas passage is continuously joined to the flat plate in the circumferential direction, and the corrugated plate at the outlet end of the gas passage is formed. (Japanese Patent Laid-Open Publication No. 3-86244) has been proposed in which a valley or a ridge on a side different from the above-mentioned joint is continuously joined to another flat plate in the circumferential direction.

【０００７】しかしながら，これらのハニカム構造体に
おいても，スコーピングの防止が充分でないと共に，ハ
ニカム構造体内部の各部分における加熱状態が充分でな
い。即ち，ハニカム構造体においては，例えば中心電極
４１と外筒電極４２の付近は比較的ガス流量が低い。そ
のため，熱が奪われ難いが，その間の中間部分ではガス
流量が多く熱を奪われ易い。そのため，例えばこの中間
部分を集中的に加熱できるよう構成することが望まれ
る。However, even in these honeycomb structures, scoping is not sufficiently prevented, and the heating state in each portion inside the honeycomb structure is not sufficient. That is, in the honeycomb structure, for example, the gas flow rate in the vicinity of the center electrode 41 and the outer cylinder electrode 42 is relatively low. For this reason, heat is not easily taken away, but the gas flow rate is large in the middle part between them, and heat is easily taken away. Therefore, for example, it is desired that the intermediate portion be configured to be intensively heated.

【０００８】また，中心電極４１は，ハニカム構造体の
外部へ連結されているため，熱が放出され易く，中心電
極付近のガス通路は特にスタートアップ時に昇温され難
い。本発明は，かかる従来の問題点に鑑み，スコーピン
グの発生がなく，加熱状態の調整が可能なハニカム構造
体を提供しようとするものである。Further, since the center electrode 41 is connected to the outside of the honeycomb structure, heat is easily released, and the temperature of the gas passage near the center electrode is hard to be increased particularly during startup. SUMMARY OF THE INVENTION The present invention has been made in view of the above-described conventional problems, and has as its object to provide a honeycomb structure which does not generate scoping and can adjust a heating state.

【０００９】[0009]

【課題の解決手段】本発明は，複数の平板と波板とを渦
巻き状に巻回してなると共に，平板及び波板は金属板で
あって少なくとも一方の表面には絶縁被膜を有し，ま
た，巻回中心部には中心電極を，一方外周部には外筒電
極を有し，上記巻回方向と直角方向には多数のガス通路
を形成してなり，両電極間に電圧を印加することにより
発熱させる形式のハニカム構造体であって，上記複数の
波板のうち第１波板とこれに隣接する両側の平板とはガ
ス通路の入口端において互いに導電可能に接合されてお
り，一方その出口端においては両者は接合されておら
ず，逆に，他の第２波板とこれに隣接する両側の平板と
はガス通路の入口端においては接合されておらず，一方
その出口端においては両者が互いに導電可能に接合され
ていることを特徴とする加熱式ハニカム構造体にある。According to the present invention, a plurality of flat plates and a corrugated plate are spirally wound, the flat plate and the corrugated plate are metal plates, and at least one surface has an insulating coating. A central electrode is provided at the center of the winding, and an outer cylindrical electrode is provided at the outer periphery. A number of gas passages are formed in a direction perpendicular to the winding direction, and a voltage is applied between the two electrodes. A honeycomb structure of a type in which heat is generated by heat generation, wherein the first corrugated sheet of the plurality of corrugated sheets and the flat plates on both sides adjacent thereto are conductively joined to each other at an inlet end of the gas passage; At the outlet end, the two are not joined. Conversely, the other second corrugated sheet and the two adjacent flat plates are not joined at the inlet end of the gas passage, while the other corrugated sheet is not joined at the outlet end. Are characterized in that they are electrically conductively joined to each other. In heated honeycomb structure.

【００１０】本発明において最も注目すべきことは，ガ
ス通路の入口端において第１波板とこれに隣接する平板
とを導電可能に接合し，その出口端は接合せず，一方逆
に出口端において第２波板とこれに隣接する平板とを導
電可能に接合し，その入口端は接合しないこと，つまり
入口端を接合した場合には出口端は接合せず，出口端側
を接合した場合には入口端は接合しないことである。What is most notable in the present invention is that the first corrugated sheet and the adjacent flat plate are conductively joined at the inlet end of the gas passage, and the outlet end is not joined, while the outlet end is reversed. The second corrugated sheet and the adjacent flat plate are conductively joined at the same time, and the inlet end is not joined. That is, when the inlet end is joined, the outlet end is not joined, and the outlet end is joined. Is that the inlet end is not joined.

【００１１】上記第１波板，第２波板は，複数の平板を
任意に選択することにより特定する。本発明では，入口
端を接合する平板を第１波板，出口端を接合する平板を
第２波板としている。第１波板と第２波板は，交互に選
択することが好ましい。これにより，加熱用電流が各平
板を順次通って，ハニカム構造体全体が加熱される。上
記平板及び波板は，帯状の金属板であり，少なくとも一
方はその表面に電気絶縁被膜を有している。The first corrugated sheet and the second corrugated sheet are specified by arbitrarily selecting a plurality of flat plates. In the present invention, the flat plate joining the inlet end is the first corrugated plate, and the flat plate joining the outlet end is the second corrugated plate. It is preferable that the first corrugated sheet and the second corrugated sheet are alternately selected. As a result, the heating current sequentially passes through the respective flat plates, and the entire honeycomb structure is heated. The flat plate and the corrugated plate are band-shaped metal plates, and at least one of them has an electrically insulating coating on the surface.

【００１２】このような絶縁被膜は，種々の方法により
金属板表面に形成できる。例えば，金属板としてＦｅ
（残）−（１８〜２５ｗｔ％）Ｃｒ−（３〜６ｗｔ％）
Ａｌ−（０．０１〜１ｗｔ％）ＲＥＭ（希土類元素，例
えば，ランタンＬａ，セリウムＣｅ，イットリウムＹ
等）〔以下，これをＦｅ−Ｃｒ−Ａｌ−ＲＥＭと記す〕
の薄い板（板厚０．０３〜０．１５ｍｍの箔）を用い
る。そして，この素材を９００℃以上の温度で１時間以
上，空気中で加熱することにより，その表面に強固な酸
化物層，即ち絶縁被膜が形成される。Such an insulating film can be formed on the surface of the metal plate by various methods. For example, as a metal plate, Fe
(Remaining)-(18 to 25 wt%) Cr-(3 to 6 wt%)
Al- (0.01-1 wt%) REM (rare earth elements such as lanthanum La, cerium Ce, yttrium Y
[Hereinafter, this is referred to as Fe-Cr-Al-REM]
(A foil having a thickness of 0.03 to 0.15 mm) is used. By heating this material in air at a temperature of 900 ° C. or more for 1 hour or more, a strong oxide layer, that is, an insulating film is formed on the surface.

【００１３】また，金属板は上記と同じものを使用し，
その表面にアルミナゾルを付着させ，それを９００℃以
上の温度で１時間以上加熱させる。これにより，アルミ
ナゾルがアルミナとなり，Ｆｅ−Ｃｒ−Ａｌ−ＲＥＭの
表面に，絶縁被膜としての酸化物層が形成される。この
場合は該絶縁被膜は，前記方法で作成されたものと，ア
ルミナゾルから作られたアルミナとの混合層となり，強
固な酸化物層となる。[0013] The same metal plate as above is used.
Alumina sol is attached to the surface and heated at a temperature of 900 ° C. or more for 1 hour or more. As a result, the alumina sol becomes alumina, and an oxide layer as an insulating film is formed on the surface of the Fe-Cr-Al-REM. In this case, the insulating coating becomes a mixed layer of the one prepared by the above method and alumina made of alumina sol, and becomes a strong oxide layer.

【００１４】次に，金属板は上記と同じものを使用し，
その表面に有機糊料とアルミナとを混合したスラリーを
付着させ，焼結させることによって，表面にアルミナの
層を形成する。この場合，一般のアルミナゾルを絶縁被
膜が必要な部分にだけ付着させることも可能であり，そ
の後の焼成によって，アルミナ層を形成させる。上記有
機糊料としては，メチルセルロース，エチルセルロー
ス，ブチラールエポキン樹脂等，接合力があり，かつ加
熱処理されたとき，飛散してなくなるものを用いる。Next, the same metal plate as above is used.
A slurry of a mixture of an organic paste and alumina is adhered to the surface and sintered to form an alumina layer on the surface. In this case, a general alumina sol can be applied only to a portion where an insulating film is required, and the alumina layer is formed by subsequent firing. As the organic glue, use is made of a material having a bonding force, such as methylcellulose, ethylcellulose and butyral epoxy resin, which does not scatter when heated.

【００１５】次に，上記入口端，出口端における接合
は，接合される第１波板又は第２波板とこれに隣接する
両側の平板との間において，加熱用の電流が流れるよ
う，導電可能に接合される必要がある。このような接合
方法としては，接合部分にロー材を介在させ，ロー材の
溶解温度で接合させる方法がある。また，レーザー溶接
法，アルゴン溶接法などがある。[0015] Next, the joining at the inlet end and the outlet end is performed so that a heating current flows between the first corrugated sheet or the second corrugated sheet to be joined and the flat plates on both sides adjacent thereto. It needs to be joined as much as possible. As such a joining method, there is a method in which a brazing material is interposed in a joining portion and the joining is performed at a melting temperature of the brazing material. In addition, there are a laser welding method and an argon welding method.

【００１６】また，例えばＦｅ−Ｃｒ−Ａｌ−ＲＥＭで
作られた平板と波板との間の上記接合部分に，Ｆｅ−Ｃ
ｒ−Ａｌ−ＲＥＭ材料からなる１〜２００μｍ程度の粒
径の粉末を介在させ，これらを焼結によって，金属拡散
接合させる方法を用いることもできる。これらの方法を
用いた接合部分は，機械的強度が高い。また，この場合
は，上記接合部分には，上記絶縁被膜を形成しておかな
い。或いは絶縁被膜を削除する。Further, for example, Fe--C--Al--REM is provided at the joint between the flat plate and the corrugated plate.
It is also possible to use a method in which a powder made of r-Al-REM material and having a particle size of about 1 to 200 μm is interposed, and the metal is diffusion bonded by sintering. Joints using these methods have high mechanical strength. In this case, the insulating film is not formed on the joint. Alternatively, the insulating coating is deleted.

【００１７】また，上記発明においては，平板と波板と
は，中心電極の近くにおいては，入口端及び出口端の両
者とも，隣接する平板と導電可能に接合されていること
を特徴とする加熱式ハニカム構造体とすることもでき
る。上記の「中心電極近」とは，ハニカム構造体の半径
の５０％以下をいう。In the above invention, the flat plate and the corrugated plate are electrically connected to the adjacent flat plate at both the entrance end and the exit end near the center electrode. A honeycomb structure can also be used. The term “near the center electrode” means 50% or less of the radius of the honeycomb structure.

【００１８】このような構成を採る場合には，中心電極
近くにおいては，平板と波板の入口端及び出口端におい
て，ハニカム構造体の半径方向に直線的に加熱用電流が
流れる。そのため，中心電極近くの平板及び波板の発熱
を抑制することができる。それ故，発熱のピーク部分
を，ガス流量の多い中心電極と外筒電極との中間付近に
設定することができる。In such a configuration, a heating current flows linearly in the radial direction of the honeycomb structure at the entrance and exit ends of the flat plate and the corrugated plate near the center electrode. Therefore, heat generation of the flat plate and the corrugated plate near the center electrode can be suppressed. Therefore, the peak portion of heat generation can be set near the middle between the center electrode and the outer cylinder electrode where the gas flow rate is large.

【００１９】また，上記発明においては，平板と波板と
は，中心電極の近くにおいては，ガス通路に沿った接触
面が導電可能に接合されていることを特徴とする加熱式
ハニカム構造体とすることもできる。このような構成を
採る場合には，中心電極近くの平板と波板は，その接合
部分において，ハニカム構造体の半径方向に加熱用電流
が流れる。そのため，上記と同様に中心電極近くの発熱
を抑制し，発熱のピーク部分を上記と同様に中間付近に
設定することができる。Further, in the above invention, the flat plate and the corrugated plate are provided with a heating type honeycomb structure characterized in that a contact surface along a gas passage is conductively joined near the center electrode. You can also. In such a configuration, a heating current flows in the radial direction of the honeycomb structure at the joint between the flat plate and the corrugated plate near the center electrode. Therefore, the heat generation near the center electrode can be suppressed in the same manner as described above, and the peak portion of the heat generation can be set near the middle similarly to the above.

【００２０】上記のごとく，平板と波板とをガス通路に
沿った接触面において接合する方法としては，絶縁被膜
を形成することなく両者の接触面を接触させ，高温に加
熱する方法がある。これにより，両面間に金属分子の移
動が生じ，金属接合が生ずる。また，ロー材により接合
することもできる。或いは，溶接，金属粉末の焼結によ
る接合方法もある。また，本発明においては，中心電極
は中空体とすることができる。これにより，中心電極付
近からハニカム構造体外部への放熱を防止することがで
きる。そのため，特に，ハニカム構造体の加熱初期にお
ける，中心電極付近の加熱遅れを防止することができ
る。As described above, as a method of joining the flat plate and the corrugated plate at the contact surface along the gas passage, there is a method in which the two contact surfaces are brought into contact without forming an insulating film and heated to a high temperature. As a result, metal molecules move between the two surfaces, and metal bonding occurs. Also, it can be joined by a brazing material. Alternatively, there is a joining method by welding or sintering of metal powder. In the present invention, the center electrode may be a hollow body. Thus, heat radiation from the vicinity of the center electrode to the outside of the honeycomb structure can be prevented. Therefore, it is possible to prevent a delay in heating in the vicinity of the center electrode, particularly in the initial stage of heating the honeycomb structure.

【００２１】[0021]

【作用及び効果】本発明においては，上記のごとく，第
１波板は入口端において隣接する波板と導電可能に接合
され，出口端においては接合されず，逆に第２波板は入
口端においては接合されずに出口端において隣接する波
板と導電可能に接合されている。In the present invention, as described above, the first corrugated sheet is conductively joined to the adjacent corrugated sheet at the entrance end, not joined at the exit end, and conversely, the second corrugated sheet is connected to the entrance end. Are joined at the outlet end to the adjacent corrugated plate in a conductive manner.

【００２２】そこで，まずスコーピングに関しては，本
発明においては，上記のごとくガス通路の入口端を接合
した場合には出口端側を接合せず，一方出口端側を接合
した場合には入口端側を接合していない。換言すれば，
波板はガス通路の一方で接合され，他方は自由状態にあ
る。そのため，ハニカム構造体に加熱冷却が繰り返し生
じても，波板は自由に伸縮することができる。Therefore, regarding the scoping, first, in the present invention, when the inlet end of the gas passage is joined as described above, the outlet end is not joined, and when the outlet end is joined, the inlet end is not joined. Not joined side. In other words,
The corrugated plate is joined to one of the gas passages and the other is free. Therefore, even if heating and cooling occur repeatedly in the honeycomb structure, the corrugated sheet can freely expand and contract.

【００２３】また，平板も，同一の波板には，入口端又
は出口端のいずれかが接合されているのみで，両端が同
一の波板に拘束されている訳ではない。そのため，平板
も，上記加熱，冷却の繰り返しに対して，自由に伸縮で
きる。したがって，波板，平板ともに，無理な熱応力が
発生せずスコーピング発生のおそれがない。Further, the flat plate is also such that either the entrance end or the exit end is joined to the same corrugated plate, and both ends are not restricted to the same corrugated plate. Therefore, the flat plate can also freely expand and contract with the repetition of the heating and cooling. Therefore, neither corrugated sheets nor flat sheets generate excessive thermal stress and there is no possibility of scoping.

【００２４】次に，加熱状態に関しては，中心電極と外
筒電極との間に加熱用電圧が印加されたときには，その
電流はまず第１波板の入口端側の接合部において一方の
平板から第１波板に入り他方の平板に入る。該電流は，
該他方の平板の中をガス通路に沿って出口端側へ流れ，
出口端側の接合部において隣接する第２波板に入り，更
に他方の平板に入る。そして，電流は，その平板をガス
通路に沿って上記とは，逆方向に入口端側に流れ，入口
端側の接合部において，上記と同様に他の第１波板に入
り更に他方の平板に入る。Next, with respect to the heating state, when a heating voltage is applied between the center electrode and the outer cylinder electrode, the current first flows from one of the flat plates at the joint on the entrance end side of the first corrugated sheet. It enters the first corrugated plate and enters the other flat plate. The current is
It flows through the other flat plate to the outlet end along the gas passage,
At the junction on the outlet end side, it enters the adjacent second corrugated sheet and further enters the other flat plate. Then, the electric current flows through the flat plate along the gas passage toward the inlet end in the opposite direction to the above, and enters the other first corrugated plate at the joint at the inlet end in the same manner as described above, and further to the other flat plate. to go into.

【００２５】このようにして，加熱電流は，概略平板の
中を順次ジグザグ状に流れるものは少量で，大部分はう
ず巻き状の平板や波板の中を流れる。この流れる量は，
ジグザグ状の電流経路の抵抗値の大きさと，うず巻き状
の平板や波板だけの中を流れる電流経路の抵抗値の大き
さとによって決まる。うず巻き状の平板，波板の中を大
部分の電流が流れると，発熱状態は均一になるが，ジグ
ザグ状にも電流が流れ，その割合が大きくなるにつれ中
心電極付近の温度が高くなる傾向にある。As described above, a small amount of the heating current sequentially flows in a zigzag manner in a substantially flat plate, and most of the heating current flows in a spirally wound flat plate or a corrugated plate. The amount of this flow is
It is determined by the magnitude of the resistance of the zigzag current path and the magnitude of the resistance of the current path flowing only in the spiral flat plate or corrugated plate. When most of the current flows through the spiral-shaped flat plate or corrugated plate, the heat generation state becomes uniform, but the current also flows in a zigzag shape, and the temperature near the center electrode tends to increase as the ratio increases. is there.

【００２６】また，前記のごとく，中心電極付近の入口
端及び出口端を，或いは中心電極付近の平板と波板の接
触部分を，導電可能に接合する場合には，前記のごとく
部分的に加熱状態を調整することもできる。以上のごと
く，本発明によれば，スコーピングの発生がなく，加熱
状態の調整が可能な加熱式ハニカム構造体を提供するこ
とができる。As described above, when the entrance end and the exit end near the center electrode or the contact portion between the flat plate and the corrugated plate near the center electrode are conductively joined, the heating is partially performed as described above. You can also adjust the state. As described above, according to the present invention, it is possible to provide a heated honeycomb structure that does not generate scoping and can adjust the heating state.

【００２７】[0027]

【実施例】【Example】

実施例１ 本発明の実施例にかかる加熱式ハニカム構造体につき，
図１〜図７を用いて説明する。本例のハニカム構造体１
は，まず図１，図５，図６に示すごとく，複数の平板２
１〜２４と波板３１〜３４とを渦巻き状に巻回してな
る。上記平板２１〜２４及び波板３１〜３４は，図２に
示すごとく，その表面に，後述する接合部分１５を除い
て，絶縁被膜２０，３０を有する金属板（実施例２に示
すＦｅ−Ｃｒ−Ａｌ−ＲＥＭ）である。Embodiment 1 A heated honeycomb structure according to an embodiment of the present invention will be described.
This will be described with reference to FIGS. Honeycomb structure 1 of this example
First, as shown in FIG. 1, FIG. 5, and FIG.
1 to 24 and corrugated plates 31 to 34 are spirally wound. As shown in FIG. 2, the flat plates 21 to 24 and the corrugated plates 31 to 34 are metal plates having insulating coatings 20 and 30 on their surfaces except for a joint portion 15 described later (Fe--Cr shown in Example 2). -Al-REM).

【００２８】また，ハニカム構造体１は，図１〜図４に
示すごとく，その中心部に中心電極４１を，一方外周部
には外筒電極４２を有し，巻回方向と直角方向には多数
のガス通路１０を形成してなる。そして，このハニカム
構造体は，中心電極４１と外筒電極４２との間に電圧を
印加することにより，全体を加熱する形式の加熱式ハニ
カム構造体である。As shown in FIGS. 1 to 4, the honeycomb structure 1 has a center electrode 41 at its center and an outer cylinder electrode 42 at its outer periphery, and is perpendicular to the winding direction. A large number of gas passages 10 are formed. The honeycomb structure is a heating type honeycomb structure in which the entire structure is heated by applying a voltage between the center electrode 41 and the outer cylinder electrode 42.

【００２９】ここに重要なことは，次のごとく波板と平
板との接合状態である。即ち，図１〜図４に示すごと
く，上記複数の波板３１〜３４のうち，第１波板３１と
これに隣接する両側の平板２１，２２とは，ガス通路１
０の入口端１１において互いに導電可能に接合され，接
合部１５を有する。また，該第１波板３１は，ガス通路
１０の出口端１２においては接合されておらず自由状態
にある（図１）。What is important here is the bonding state between the corrugated sheet and the flat plate as follows. That is, as shown in FIGS. 1 to 4, among the plurality of corrugated plates 31 to 34, the first corrugated plate 31 and the flat plates 21 and 22 on both sides adjacent thereto are connected to the gas passage 1.
At the inlet end 11, the two are conductively joined to each other and have a joint 15. Further, the first corrugated sheet 31 is not joined at the outlet end 12 of the gas passage 10 and is in a free state (FIG. 1).

【００３０】一方，逆に第２波板３２とこれに隣接する
両側の平板２２，２３とは，ガス通路１０の入口端１１
においては，接合されていない。また，該第２波板３２
は，出口端において，上記平板２２，２３に導電可能に
接合されて，接合部１５を有する（図１，図２）。On the other hand, on the other hand, the second corrugated plate 32 and the flat plates 22 and 23 on both sides adjacent thereto are connected to the inlet end 11 of the gas passage 10.
Are not joined. The second corrugated sheet 32
At the outlet end, is electrically conductively joined to the flat plates 22 and 23 and has a joint 15 (FIGS. 1 and 2).

【００３１】上記平板２１〜２４，波板３１〜３４は，
図２に示すごとく，その表面に絶縁被膜２０，３０を有
し，両者の接触部分は互いに電気的に絶縁されている。
しかし，上記接合部１５を形成する部分には，絶縁被膜
２０，３０が形成されていない。また，本例において
は，入口端１１を接合する第１波板は波板３１，３３
を，出口端１２を接合する第２波板は波板３２，３４と
している。即ち，第１波板と第２波板を交互に配置して
いる。The flat plates 21 to 24 and the corrugated plates 31 to 34 are
As shown in FIG. 2, insulating coatings 20 and 30 are provided on the surface, and the contact portions of both are electrically insulated from each other.
However, the insulating coatings 20 and 30 are not formed on the portion where the joint 15 is formed. Also, in this example, the first corrugated sheet for joining the inlet end 11 is corrugated sheets 31 and 33.
And the second corrugated sheet for joining the outlet end 12 is corrugated sheets 32 and 34. That is, the first corrugated sheet and the second corrugated sheet are alternately arranged.

【００３２】また，図７に示すごとく，上記中心電極４
１と外筒電極４２との間には，電源４３，スイッチ４４
を介在させて，ハニカム構造体１に加熱用の電圧を印加
するためのヒート回路が形成されている。図７におい
て，符号Ｇ及び矢印は，排気ガス等のガス及びその流れ
を示す。本例の加熱式ハニカム構造体１は，実施例２に
具体例を示すごとく，例えば自動車の排気ガス浄化用触
媒の担体に用いる。Further, as shown in FIG.
1 and an outer cylinder electrode 42, a power supply 43, a switch 44
A heating circuit for applying a heating voltage to the honeycomb structure 1 is formed with the interposition of the heating circuit. In FIG. 7, a symbol G and an arrow indicate a gas such as exhaust gas and its flow. As shown in a specific example in the second embodiment, the heated honeycomb structure 1 of this embodiment is used, for example, as a carrier of a catalyst for purifying exhaust gas of an automobile.

【００３３】次に作用効果につき説明する。本例のハニ
カム構造体１は，その使用に当たって，前記のごとく，
加熱，放冷が繰り返される。そのため，スコーピングが
発生しようとする。しかし本例の波板３１〜３４は，前
記のごとく，平板２１〜２４に対して，入口端１１と出
口端１２とにおいて交互に，導電可能に接合されてお
り，出口端又は入口端の一方が自由状態にある。Next, the function and effect will be described. When the honeycomb structure 1 of this example is used, as described above,
Heating and cooling are repeated. Therefore, scoping is about to occur. However, as described above, the corrugated plates 31 to 34 of this example are conductively joined to the flat plates 21 to 24 alternately at the entrance end 11 and the exit end 12, and one of the exit end or the entrance end is provided. Is in a free state.

【００３４】そのため，ハニカム構造体１に，加熱冷却
が繰り返し生じても，波板３１〜３４は自由に伸縮する
ことができる。また，平板２１〜２４も，同一の波板に
は，入口端１１又は出口端１２のいずれかが接合されて
いるのみである。そのため，上記加熱冷却の繰り返しに
対して自由に伸縮できる。したがって，波板３１〜３
４，平板２１〜２４ともに，無理な熱応力が発生せず，
スコーピング発生のおそれがない。Therefore, even if heating and cooling occur repeatedly in the honeycomb structure 1, the corrugated plates 31 to 34 can freely expand and contract. In addition, the flat plates 21 to 24 also have only one of the inlet end 11 and the outlet end 12 joined to the same corrugated plate. Therefore, it can freely expand and contract with the repetition of the heating and cooling. Therefore, corrugated sheets 31 to 3
4, No unreasonable thermal stress is generated in any of the flat plates 21 to 24,
There is no risk of scoping.

【００３５】また，加熱状態に関しては，中心電極４１
と外筒電極４２との間に加熱用電圧が印加されたときに
は，電流は中心電極４１から外筒電極４２に向かって流
れる。このとき，図２に示すごとく，電流Ｅは矢印で示
すごとく，平板２１の入口端２１１から接合部１５，第
１波板３１の入口端３１１を経て，更に第１波板３１と
平板２２との間の接合１５を経て平板２２に入る。As for the heating state, the center electrode 41
When a heating voltage is applied between the outer electrode 42 and the outer cylinder electrode 42, the current flows from the center electrode 41 to the outer cylinder electrode 42. At this time, as shown in FIG. 2, the current E flows from the entrance end 211 of the flat plate 21 through the joining portion 15 and the entrance end 311 of the first corrugated plate 31 as shown by the arrow, and further, the first corrugated plate 31 and the flat plate 22 And enters the flat plate 22 through the joint 15.

【００３６】そして，平板２２の中を，ガス通路１０に
沿って，入口端から出口端に向かって流れる。その後平
板２２の出口端側においては，上記と同様に，図１より
知られるごとく，接合部１５から第２波板３２に入る。
そして，第２波板３２の出口端を経て，更に第２波板３
２と平板２３との接合部１５を経て平板２３に入る。そ
して，平板２３内を入口端１１側に向かって流れる。Then, the gas flows through the flat plate 22 along the gas passage 10 from the inlet end to the outlet end. Thereafter, at the exit end side of the flat plate 22, the second corrugated plate 32 enters from the joint portion 15 as is known from FIG.
Then, through the exit end of the second corrugated sheet 32, the second corrugated sheet 3
It enters the flat plate 23 through the joint 15 between the 2 and the flat plate 23. Then, it flows toward the entrance end 11 side in the flat plate 23.

【００３７】このようにして，上記電流Ｅはうず巻き状
の平板２１〜２４，波板３１〜３４の部分に大部分の電
流が流れ，平板内にも上記のごとくジグザグ状に少量の
電流が流れる。その結果，中心電極部付近の温度が高く
なるが，概略ハニカム構造体全体を加熱することができ
る。As described above, most of the current E flows through the spirally wound flat plates 21 to 24 and the corrugated plates 31 to 34, and a small amount of current flows in the flat plate in a zigzag manner as described above. . As a result, although the temperature near the center electrode portion increases, the entire honeycomb structure can be heated substantially.

【００３８】実施例２ 本例は，実施例１に示したものと同様のハニカム構造体
を，自動車の排気ガス浄化用触媒の担体に用いた具体例
を示すものである。まず，上記ハニカム構造体を作製す
るに当たっては，平板２１（他の平板も同様）及び波状
に加工した波板３１（他の波板も同様）を準備する。平
板２１は，長さ９００〜１０００ｍｍ，幅（ガス通路方
向）３５ｍｍのものを４枚準備した。この平板２１に
は，その表裏面に，空気中高温処理によって形成したＡ
ｌ₂ Ｏ₃ を主成分とする絶縁被膜２０が形成されている
（図２）。Embodiment 2 This embodiment shows a specific example in which a honeycomb structure similar to that shown in Embodiment 1 is used as a carrier of an exhaust gas purifying catalyst for an automobile. First, when manufacturing the above-mentioned honeycomb structure, a flat plate 21 (the same applies to other flat plates) and a corrugated corrugated plate 31 (similar to the other corrugated plates) are prepared. Four flat plates 21 having a length of 900 to 1000 mm and a width (gas passage direction) of 35 mm were prepared. This flat plate 21 has A and A formed on its front and back surfaces by a high temperature treatment in air.
An insulating coating 20 mainly composed of l ₂ O ₃ is formed (FIG. 2).

【００３９】但し，前記接合部１５を形成する部分に
は，入口端又は出口端に，２〜３ｍｍの幅で絶縁被膜は
形成されていない。一方，波板３１は，長さ９００〜１
０００ｍｍ，幅３５ｍｍのものを４枚準備した。波板３
１の表面には，絶縁被膜は形成されていない。上記平板
及び波板は，共にＦｅ（残部）−２０ｗｔ％Ｃｒ−５ｗ
ｔ％Ａｌ−０．１ｗｔ％ＲＥＭ（前記参照）の，厚み
０．０５ｍｍの金属板を用いた。However, no insulating coating having a width of 2 to 3 mm is formed at the inlet end or the outlet end of the portion where the joint 15 is formed. On the other hand, the corrugated plate 31 has a length of 900-1.
Four pieces having a size of 000 mm and a width of 35 mm were prepared. Corrugated sheet 3
No insulating coating is formed on the surface of the first. Both the flat plate and the corrugated plate are made of Fe (remainder) -20wt% Cr-5w
A 0.05 mm thick metal plate of t% Al-0.1 wt% REM (see above) was used.

【００４０】その後，上記８枚の平板２１，波板３１を
交互に積層させた状態で，これらの基端部を中心電極４
１に電気溶接し，次いで図５，図６に示すごとく巻回し
た。巻回後，巻回物の外周と外筒電極４２の外周との間
に，ニッケルのロー材を配置し，両者を圧入した。その
後，８００〜１２００℃の不活性ガス中または真空中
（１×１０^-4Ｔｏｒｒ）で焼成し，接合させた。これに
より，平板２１と波板３１との接触部分において，平板
２１に絶縁被膜が形成されていない部分と波板３１（本
例では絶縁被膜は形成されていない）とが，金属拡散に
より接合され，接合部１５を形成する。Thereafter, with the eight flat plates 21 and the corrugated plates 31 being alternately laminated, the base ends thereof are connected to the center electrode 4.
1 and then wound as shown in FIGS. After the winding, a nickel brazing material was arranged between the outer periphery of the wound material and the outer periphery of the outer cylinder electrode 42, and both were press-fitted. Then, it was baked in an inert gas at 800 to 1200 ° C. or in a vacuum (1 × 10 ⁻⁴ Torr) and joined. Thereby, at the contact portion between the flat plate 21 and the corrugated plate 31, the portion where the insulating coating is not formed on the flat plate 21 and the corrugated plate 31 (in this example, the insulating coating is not formed) are joined by metal diffusion. , Forming a joint 15.

【００４１】なお，上記平板２１と波板３１の端部の接
合において，強い接合が得られないときには，平板２１
の絶縁被膜が形成されていない部分に，上記と同様組成
のＦｅ−Ｃｒ−Ａｌ−ＲＥＭの粉末８ペーストで付着さ
せておく。これにより，該粉末が上記加熱焼成時に溶融
し，両者が強固に接合される。以上により，ハニカム構
造体が作製される。When strong joining cannot be obtained in joining the ends of the flat plate 21 and the corrugated plate 31, the flat plate
Is applied to a portion where the insulating coating is not formed by using a paste 8 of Fe-Cr-Al-REM powder having the same composition as above. As a result, the powder is melted during the heating and firing, and the two are firmly joined. Thus, a honeycomb structure is manufactured.

【００４２】次に，上記ハニカム構造体に触媒担体とし
てのγ−Ａｌ₂ Ｏ₃ 粉末を付着させる。即ち，γ−Ａｌ
₂ Ｏ₃ 粉末と有機糊料とからなるスラリー中に，上記ハ
ニカム構造体を浸漬し，平板及び波板の表面にγ−Ａｌ
₂ Ｏ₃ 粉末のスラリーを付着させる。次いで，このスラ
リー付着ハニカム構造体を６００〜８００℃で乾燥焼成
し，γ−Ａｌ₂ Ｏ₃ 層を平板及び波板の表面に強固に固
着させる。これにより，担体用のハニカム構造体が得ら
れた。Next, γ-Al ₂ O ₃ powder as a catalyst carrier is adhered to the honeycomb structure. That is, γ-Al
_The above honeycomb structure is immersed in a slurry composed of ₂ O ₃ powder and an organic paste, and γ-Al
A slurry of ₂ O ₃ powder is deposited. Next, the slurry-attached honeycomb structure is dried and fired at 600 to 800 ° C., and the γ-Al ₂ O ₃ layer is firmly fixed to the surfaces of the flat plate and the corrugated plate. As a result, a honeycomb structure for a carrier was obtained.

【００４３】次に，このハニカム構造体のγ−Ａｌ₂ Ｏ
₃ 層の中に，排気浄化触媒としての，Ｐｔ，Ｐｈ，Ｐ
ｄ，Ｒｕなどを担持させる。これにより，触媒を担持し
た排気浄化用ハニカム構造体が得られた。その後，この
ハニカム構造体を，自動車エンジンの排気パイプ中のコ
ンバータ内に設置する。その他は，実施例１と同様であ
る。Next, the γ-Al ₂ O of the honeycomb structure was used.
_{In three} layers, Pt, Ph, P
d, Ru, etc. are carried. As a result, an exhaust purification honeycomb structure carrying the catalyst was obtained. Thereafter, the honeycomb structure is installed in a converter in an exhaust pipe of an automobile engine. Others are the same as the first embodiment.

【００４４】上記ハニカム構造体は，直径約９０ｍｍ，
幅３５ｍｍである。中心電極４１と外筒電極４２との間
には，１２ボルトの加熱用電圧が印加でき，１５０〜２
００Ａの電流が流れるよう構成されている（図７）。ま
た，通電時間１０〜１５秒で，ハニカム構造体は３５０
〜４００℃に加熱することができた。The honeycomb structure has a diameter of about 90 mm,
The width is 35 mm. A heating voltage of 12 volts can be applied between the center electrode 41 and the outer cylinder electrode 42,
It is configured so that a current of 00 A flows (FIG. 7). Further, when the energization time is 10 to 15 seconds, the honeycomb structure is 350
~ 400 ° C could be heated.

【００４５】上記ハニカム構造体は，排気量２０００ｃ
ｃのエンジンのマニホールド直下に装着してある。この
触媒ハニカム構造体においては，加熱スタート後１０〜
１５秒で，排気ガス中の炭化水素，一酸化炭素，窒素酸
化物を大幅に浄化することができた。また，このハニカ
ム構造体は，長時間の使用においても，スコーピングは
何ら発生しなかった。The above honeycomb structure has a displacement of 2000 c.
The engine is mounted just below the manifold of engine c. In this catalyst honeycomb structure, 10 to 10
In 15 seconds, hydrocarbons, carbon monoxide, and nitrogen oxides in the exhaust gas were significantly purified. In addition, the scoping did not occur at all in the honeycomb structure even when used for a long time.

【００４６】実施例３ 本例は，図８に示すごとく，平板２１〜２４の幅は外筒
電極４２と同じであるが，波板３１〜３４の幅は，外筒
電極４２よりも少し短く構成したものである。そして，
波板３１，３３は，ハニカム構造体１の入口端１１にお
いては，平板２１〜２４よりも若干後退し，出口端１２
においては平板２１〜２４と同じ位置にある。また，波
板３２，３４は，上記と逆に，出口端１２が平板２１〜
２４より後退している。Embodiment 3 In this embodiment, as shown in FIG. 8, the width of the flat plates 21 to 24 is the same as that of the outer cylinder electrode 42, but the width of the corrugated plates 31 to 34 is slightly shorter than that of the outer cylinder electrode 42. It is composed. And
At the entrance end 11 of the honeycomb structure 1, the corrugated plates 31 and 33 are slightly retracted from the flat plates 21 to 24, and the exit ends 12
Is located at the same position as the flat plates 21 to 24. Conversely, the corrugated plates 32 and 34 have the outlet ends 12 of the flat plates 21 to
It is receding from 24.

【００４７】具体的には，平板２１〜２４の幅が３５ｍ
ｍであるのに比して，波板３１〜３４の幅は３２〜３４
ｍｍである。その他は実施例１と同様である。上記のご
とく，波板３１，３３と波板３２，３４とを，出口端１
２又は入口端１１側へ寄ておくことにより，その端面が
揃った部分のみを放電接合等により接合できる。そのた
め，上記各波板を，出口端１２側又は入口端１１側にお
いて，隣接する平板に対して容易に接合することがで
き，生産性も向上する。また，本例においても，実施例
１と同様の効果を得ることができる。Specifically, the width of the flat plates 21 to 24 is 35 m
m, the width of the corrugated sheets 31-34 is 32-34.
mm. Others are the same as the first embodiment. As described above, the corrugated sheets 31 and 33 and the corrugated sheets 32 and 34 are connected to the outlet end 1.
By bringing it closer to the inlet end 2 or the inlet end 11, only the part having the same end surface can be joined by discharge joining or the like. Therefore, each corrugated sheet can be easily joined to the adjacent flat plate at the outlet end 12 side or the inlet end 11 side, and the productivity is also improved. Also, in this embodiment, the same effect as in the first embodiment can be obtained.

【００４８】実施例４ 本例は，図９に示すごとく，中心電極４１の付近におい
ては，平板２１（２２〜２４も同様）と波板３１（３２
〜３４も同様）の入口端及び出口端の両端を，導電可能
に接合部１５により接合した例である。また，平板２１
と波板３１とは，中心電極４１の付近では，同じ幅であ
るが，それよりも外方は実施例３と同様に波板３１の幅
が小さくなっている。その他は実施例３と同様である。Embodiment 4 In this embodiment, as shown in FIG. 9, a flat plate 21 (similarly for 22 to 24) and a corrugated plate 31 (32
This is an example in which both ends of an inlet end and an outlet end of the same are connected by the connecting portion 15 so as to be conductive. In addition, the flat plate 21
The corrugated plate 31 and the corrugated plate 31 have the same width in the vicinity of the center electrode 41, but the width of the corrugated plate 31 is smaller outside the corrugated plate 31 as in the third embodiment. Others are the same as the third embodiment.

【００４９】即ち，まず平板２１は，同図のＡに示すご
とく，同じ幅を有し，外周縁部２９を３〜４ｍｍ残し，
絶縁被膜２０が形成されている。一方，波板３１は，同
図のＢに示しすごとく，中心電極４１の付近に巻回され
る部分が平板２１と同じ等幅部３７を有し，それよりも
外方側は段差部３８を有している。段差部３８は，同図
の下方が少し欠落したようになっており，等幅部３７よ
りもその幅が小さい。That is, first, the flat plate 21 has the same width as shown in FIG.
An insulating coating 20 is formed. On the other hand, the corrugated plate 31 has the same width portion 37 as the flat plate 21 at the portion wound near the center electrode 41 as shown in FIG. have. The step portion 38 is such that the lower part of the figure is slightly missing, and has a smaller width than the equal width portion 37.

【００５０】そのため，波板３１を巻回したときには，
同図Ｃの右方部分に示すごとく，波板３１の入口端３１
１は平板の入口端１１と同じ位置にあるが，波板３１の
出口端３１２側は平板の出口端よりも後退している。そ
して，波板３１と３３は上記形状を有し，波板３２と３
４とは，これと逆に上記段差部３８が出口端側に形成さ
れている。そのため，波板３２，３４の入口端は，平板
２１〜２４の入口端側よりも後退している（図９Ｃの右
方部分）。Therefore, when the corrugated sheet 31 is wound,
As shown in the right part of FIG.
1 is located at the same position as the entrance end 11 of the flat plate, but the exit end 312 side of the corrugated plate 31 is retracted from the exit end of the flat plate. And the corrugated plates 31 and 33 have the above-mentioned shape, and the corrugated plates 32 and 3
Contrary to this, the step 38 is formed on the outlet end side. Therefore, the entrance ends of the corrugated plates 32 and 34 are retracted from the entrance ends of the flat plates 21 to 24 (rightward portion in FIG. 9C).

【００５１】上記平板２１〜２４と波板３１〜３４とを
巻回し，次いで，平板と波板との幅方向端面において両
者が同じ位置にある部分を，実施例３のごとく，放電接
合する。これにより，図９Ｃに示すごとく，中心電極４
１の近くには，平板と波板の両端に導電可能な接合１５
を有する短絡部３７０が形成される。一方，それより
も，外方（外筒電極４２側）には，実施例３と同様に，
片面に交互に接合部１５を有するジグザグ部３８０が形
成される。The flat plates 21 to 24 and the corrugated plates 31 to 34 are wound, and then the portions where the flat plates and the corrugated plates are located at the same position on the widthwise end faces are subjected to discharge joining as in the third embodiment. As a result, as shown in FIG.
In the vicinity of 1, a conductive joint 15 is provided at both ends of the flat plate and the corrugated plate.
Is formed. On the other hand, on the other side (on the outer cylinder electrode 42 side), as in the third embodiment,
Zigzag portions 380 having joining portions 15 alternately on one side are formed.

【００５２】上記ハニカム構造体においては，これに実
施例１と同様に加熱用電圧を印加すると，電流の大部分
はうず巻き状の平板，波板を流れ，少量の電流がジグザ
グ部を流れる。なお，短絡部３７０においては，平板及
び波板の両端が接合されているので，電流は入口端，出
口端を半径方向に流れ（短絡）る。そのため，ジグザグ
部３８０は中心電極に近い部分が高温に加熱され易い
が，全体も加熱される。一方短絡部３７０は，ジグザグ
部よりの熱の伝導で加熱される程度の加熱状態となる。In the above honeycomb structure, when a heating voltage is applied to the honeycomb structure in the same manner as in the first embodiment, most of the current flows through the spiral flat plate or corrugated plate, and a small amount of current flows through the zigzag portion. In the short-circuit portion 370, since both ends of the flat plate and the corrugated plate are joined, a current flows in a radial direction at the entrance end and the exit end (short-circuit). Therefore, the portion of the zigzag portion 380 close to the center electrode is easily heated to a high temperature, but the whole is also heated. On the other hand, the short-circuit portion 370 is in a heated state in which it is heated by conduction of heat from the zigzag portion.

【００５３】それ故，本例によれば，中心電極４１付近
（半径の５０％）は，熱伝導によって加熱されるのみで
ある。一方ガスの流量が多い中間部分〜外周部は，上記
のごとく積極的に加熱することができ，加熱状態の調整
を行うことができる。その他，実施例１と同様の効果を
得ることができる。Therefore, according to the present embodiment, the vicinity of the center electrode 41 (50% of the radius) is only heated by heat conduction. On the other hand, the intermediate portion to the outer peripheral portion where the gas flow rate is large can be actively heated as described above, and the heating state can be adjusted. In addition, the same effects as in the first embodiment can be obtained.

【００５４】実施例５ 本例のハニカム構造体は図１０に示すごとく，中心電極
４１の付近は，平板２１〜２４と波板３１〜３４の接触
部分も，互いに導電可能に接合して接合部１６を形成し
たものである。また，実施例３と同様に，波板３１〜３
４は，平板２１〜２４よりもその幅が小さい。また，同
図Ｃに示すごとく，波板３１，３３は，ガス通路の入口
端１１においては平板２１と同じ位置にあるが，出口端
１２に置いては平板２１よりも内側にある。一方，波板
３２，３３は上記と逆の配置である。Embodiment 5 As shown in FIG. 10, in the honeycomb structure of this embodiment, the contact portions of the flat plates 21 to 24 and the corrugated plates 31 to 34 near the center electrode 41 are conductively joined to each other. 16 is formed. Further, similarly to the third embodiment, the corrugated plates 31 to 3 are used.
4 has a smaller width than the flat plates 21 to 24. Further, as shown in FIG. C, the corrugated plates 31 and 33 are located at the same position as the flat plate 21 at the inlet end 11 of the gas passage, but are located inside the flat plate 21 at the outlet end 12. On the other hand, the corrugated plates 32 and 33 are arranged in the reverse of the above.

【００５５】上記接合状態とするために，同図Ａに示す
如く，平板２１〜２４は，実施例４（図９）に比して，
中心電極の近くには絶縁被膜２０を形成していない。こ
こに，平板の全長の約３０％が絶縁被膜２０を有する絶
縁被膜形成部２８を，残りが金属表面部２７を形成して
いる。これらは，平板の表面，裏面とも同様である。ま
た，平板の外周部分２９には同図Ａに示すごとく，接合
部１５を形成するため，絶縁被膜は形成されていない。As shown in FIG. 9A, the flat plates 21 to 24 are formed as shown in FIG.
No insulating coating 20 is formed near the center electrode. Here, about 30% of the entire length of the flat plate forms the insulating film forming portion 28 having the insulating film 20, and the rest forms the metal surface portion 27. These are the same for the front and back surfaces of the flat plate. In addition, as shown in FIG. 1A, no insulating coating is formed on the outer peripheral portion 29 of the flat plate, as shown in FIG.

【００５６】本例のハニカム構造体においては，中心電
極４１の付近は，ハニカム構造体の半径の約５０％の範
囲において，平板２１〜２４と波板３１〜３４とがその
接触部分において全て導電可能な接合１６を形成してい
る。上記接合１６は，平板の上記金属表面部２７と波板
との接触部を，溶接，ロー付け，焼結等により接合する
ことにより形成する。その他は，実施例３と同様であ
る。In the honeycomb structure of the present example, in the vicinity of the center electrode 41, the flat plates 21 to 24 and the corrugated plates 31 to 34 are all electrically conductive at the contact portion within a range of about 50% of the radius of the honeycomb structure. A possible joint 16 is formed. The joint 16 is formed by joining a contact portion between the flat metal surface portion 27 and the corrugated plate by welding, brazing, sintering, or the like. Others are the same as the third embodiment.

【００５７】本例のハニカム構造体によれば，中心電極
４１の付近において，平板と波板とがその接触部分にお
いて前面接合されている。そのため，この部分では，加
熱用電流が短絡して流れることになる。それ故，実施例
４と同様に，中心電極付近は発熱が抑制され，それより
も外周方向に，発熱のピークを設定することができる。
その他，実施例１と同様の効果を得ることができる。According to the honeycomb structure of the present embodiment, the flat plate and the corrugated plate are joined to each other at the front portion near the center electrode 41 at the contact portion. Therefore, in this portion, the heating current flows due to a short circuit. Therefore, similarly to the fourth embodiment, heat generation is suppressed in the vicinity of the center electrode, and a heat generation peak can be set in the outer peripheral direction.
In addition, the same effects as in the first embodiment can be obtained.

【００５８】実施例６ 本例は，図１１に示すごとく，実施例４のハニカム構造
体において，中心電極４１の付近の平板２１〜２４と波
板３１〜３４とをその接触部分において導電可能に接合
し，接合部１６を形成したものである。換言すれば，実
施例４に示した，段差部３８を有する波板３１〜３４
（図９Ｂ）と，実施例５に示した金属表面部２７を有す
る平板２１〜２４（図１０Ａ）とを用いたものである。
本例によれば，実施例５と同様の効果を得ることができ
る。Embodiment 6 In this embodiment, as shown in FIG. 11, in the honeycomb structure of the embodiment 4, the flat plates 21 to 24 and the corrugated plates 31 to 34 near the center electrode 41 are made conductive at the contact portions. It is joined to form a joint 16. In other words, the corrugated plates 31 to 34 having the steps 38 shown in the fourth embodiment.
(FIG. 9B) and the flat plates 21 to 24 (FIG. 10A) having the metal surface portion 27 shown in the fifth embodiment.
According to this embodiment, the same effects as in the fifth embodiment can be obtained.

【００５９】実施例７ 本例においては，中心電極付近を電気的に短絡した場合
（上記実施例５，図１０。これを試料Ｙとする）と，短
絡しなかった場合（実施例１，図１。これを試料Ｚとす
る）とにおける，発熱状態をテストした。テストに供し
たハニカム構造体は，図１３に示すごとく，直径Ｒが８
９ｍｍ，幅Ｗが３５ｍｍ，中心電極の直径Ｄが８ｍｍで
ある。Embodiment 7 In this embodiment, the case where the center electrode is short-circuited in the vicinity of the center electrode (Embodiment 5, FIG. 10; this is referred to as sample Y) and the case where no short-circuit occurs (Example 1, FIG. 1. This is referred to as Sample Z). The honeycomb structure subjected to the test had a diameter R of 8 as shown in FIG.
9 mm, the width W is 35 mm, and the diameter D of the center electrode is 8 mm.

【００６０】上記発熱テストにおいては，ハニカム構造
体の幅方向において，その端面より１７ｍｍの深さに熱
電対を配置し，中心電極４１と外筒電極４２との間に
３．１ＫＷの電圧を印加した。そして，通電２０秒後に
おける，半径方向の各部の温度を測定した。その結果
を，図１２に，横軸に中心電極から外筒電極までの距離
（ｍｍ），縦軸に温度（℃）を採って示した。In the heat generation test, a thermocouple is arranged at a depth of 17 mm from the end face in the width direction of the honeycomb structure, and a voltage of 3.1 KW is applied between the center electrode 41 and the outer cylinder electrode 42. did. Then, the temperature of each part in the radial direction was measured 20 seconds after energization. The results are shown in FIG. 12, with the horizontal axis representing the distance (mm) from the center electrode to the outer cylinder electrode and the vertical axis representing the temperature (° C.).

【００６１】同図より知られるごとく，中心電極付近に
電気的短絡部を設けた試料Ｙは，その短絡部では温度が
余り高くないことが分かる。一方，短絡部を設けていな
い試料Ｚは，中心電極付近においては温度が高いが，一
方ハニカム構造体の半径の半分よりも外方では，逆に試
料Ｙよりも低温となっている。上記より知られるごと
く，中心電極付近に電気的短絡部を設けたハニカム構造
体Ｙ（実施例４〜６）は，通気量の多い中心電極と外筒
との中間付近における発熱を大きくすることができる。As can be seen from the figure, it is understood that the temperature of the sample Y in which an electrical short was provided near the center electrode was not so high at the short. On the other hand, the sample Z in which the short-circuit portion is not provided has a high temperature near the center electrode, but has a lower temperature than the sample Y on the other hand outside the half of the radius of the honeycomb structure. As is known from the above description, the honeycomb structure Y provided with the electrical short-circuit portion near the center electrode (Examples 4 to 6) can increase the heat generation near the middle between the center electrode and the outer cylinder having a large air flow. it can.

【００６２】実施例８ 本例は，図１４に示すごとく，実施例１のハニカム構造
体において，中心電極４１の内部に中空部４１２を形成
したものである。本例においては，中心電極４１が中空
体であるため，質量が低減した分だけ，中心電極４１の
昇温により奪われる熱を抑制することができる。そのた
め，加熱スタート時におけるハニカム構造体の昇温時間
を短くすることができる。その他，実施例１と同様の効
果を得ることができる。Embodiment 8 In this embodiment, as shown in FIG. 14, a hollow portion 412 is formed inside the center electrode 41 in the honeycomb structure of Embodiment 1. In this example, since the center electrode 41 is a hollow body, the heat taken off by the temperature rise of the center electrode 41 can be suppressed by the reduced mass. Therefore, it is possible to shorten the time for heating the honeycomb structure at the start of heating. In addition, the same effects as in the first embodiment can be obtained.

【図面の簡単な説明】[Brief description of the drawings]

【図１】実施例１におけるハニカム構造体の，図５のＡ
−Ａ線矢視断面図。FIG. 1A shows a honeycomb structure according to a first embodiment of the present invention;
FIG.

【図２】実施例１のハニカム構造体における，要部拡大
断面図。FIG. 2 is an enlarged sectional view of a main part of the honeycomb structure of the first embodiment.

【図３】実施例１における平板と波板の巻回状態を示す
説明図。FIG. 3 is an explanatory diagram illustrating a winding state of a flat plate and a corrugated plate according to the first embodiment.

【図４】実施例１における平板と波板の接合状態を示す
説明図。FIG. 4 is an explanatory view showing a joined state of a flat plate and a corrugated plate in the first embodiment.

【図５】実施例１のハニカム構造体における，巻回状態
を示す正面図。FIG. 5 is a front view showing a wound state of the honeycomb structure of the first embodiment.

【図６】実施例１のハニカム構造体の一部省略正面図。FIG. 6 is a partially omitted front view of the honeycomb structure of the first embodiment.

【図７】実施例１のハニカム構造体の側面図及びヒータ
回路図。FIG. 7 is a side view and a heater circuit diagram of the honeycomb structure of the first embodiment.

【図８】実施例３のハニカム構造体における断面図。FIG. 8 is a cross-sectional view of a honeycomb structure according to a third embodiment.

【図９】実施例４のハニカム構造体における，平板
（Ａ），波板（Ｂ）及びハニカム断面（Ｃ）の説明図。FIG. 9 is an explanatory diagram of a flat plate (A), a corrugated plate (B), and a honeycomb cross section (C) in the honeycomb structure of the fourth embodiment.

【図１０】実施例５のハニカム構造体における，平板
（Ａ），波板（Ｂ）及びハニカム断面（Ｃ）の説明図。FIG. 10 is an explanatory view of a flat plate (A), a corrugated plate (B), and a honeycomb cross section (C) in the honeycomb structure of the fifth embodiment.

【図１１】実施例６のハニカム構造体における，平板
（Ａ），波板（Ｂ）及びハニカム断面（Ｃ）の説明図。FIG. 11 is an explanatory diagram of a flat plate (A), a corrugated plate (B), and a honeycomb cross section (C) in the honeycomb structure of the sixth embodiment.

【図１２】実施例７におけるハニカム構造体の，半径方
向の温度分布を示す線図。FIG. 12 is a diagram showing a radial temperature distribution of a honeycomb structure according to a seventh embodiment.

【図１３】実施例７のハニカム構造体における斜視図。FIG. 13 is a perspective view of a honeycomb structure according to a seventh embodiment.

【図１４】実施例８のハニカム構造体の断面図。FIG. 14 is a sectional view of a honeycomb structure according to an eighth embodiment.

【図１５】従来のハニカム構造体の断面図。FIG. 15 is a sectional view of a conventional honeycomb structure.

【符号の説明】[Explanation of symbols]

１．．．ハニカム構造体， １０．．．ガス通路， １１．．．入口端， １２．．．出口端， １５，１６．．．接合部， ２１〜２４．．．平板， ３１〜３４．．．波板， ４１．．．中心電極， ４２．．．外筒電極， 1. . . 9. honeycomb structure, . . 10. gas passages; . . Inlet end, 12. . . Exit end, 15,16. . . Joint, 21-24. . . Flat plate, 31-34. . . Corrugated sheet, 41. . . Center electrode, 42. . . Outer cylinder electrode,

フロントページの続き (56)参考文献 特開 昭48−54312（ＪＰ，Ａ) 特開 平１−242153（ＪＰ，Ａ) 特開 平２−223622（ＪＰ，Ａ) 特開 平４−50419（ＪＰ，Ａ) (58)調査した分野(Int.Cl.⁷，ＤＢ名) F01N 3/02 341 F01N 3/20 F01N 3/24 F01N 3/28 301 H05B 3/20 396 Continuation of the front page (56) References JP-A-48-54312 (JP, A) JP-A-1-242153 (JP, A) JP-A-2-223622 (JP, A) JP-A-4-50419 (JP) , A) (58) Field surveyed (Int. Cl. ⁷ , DB name) F01N 3/02 341 F01N 3/20 F01N 3/24 F01N 3/28 301 H05B 3/20 396

Claims (4)

(57)【特許請求の範囲】(57) [Claims] 【請求項１】 複数の平板と波板とを渦巻き状に巻回し
てなると共に，平板及び波板は金属板であって少なくと
も一方の表面には絶縁被膜を有し，また，巻回中心部に
は中心電極を，一方外周部には外筒電極を有し，上記巻
回方向と直角方向には多数のガス通路を形成してなり，
両電極間に電圧を印加することにより発熱させる形式の
ハニカム構造体であって，上記複数の波板のうち第１波
板とこれに隣接する両側の平板とはガス通路の入口端に
おいて互いに導電可能に接合されており，一方その出口
端においては両者は接合されておらず，逆に，他の第２
波板とこれに隣接する両側の平板とはガス通路の入口端
においては接合されておらず，一方その出口端において
は両者が互いに導電可能に接合されていることを特徴と
する加熱式ハニカム構造体。1. A plurality of flat plates and a corrugated plate are spirally wound, the flat plate and the corrugated plate are metal plates, at least one surface of which has an insulating coating, and a winding center portion. Has a central electrode and an outer cylinder has an outer cylindrical electrode, and has a number of gas passages formed in a direction perpendicular to the winding direction.
A honeycomb structure of a type in which heat is generated by applying a voltage between both electrodes, wherein a first corrugated sheet of the plurality of corrugated sheets and flat plates on both sides adjacent thereto are mutually conductive at an inlet end of a gas passage. At the outlet end, but not at the outlet end, and vice versa.
A heated honeycomb structure characterized in that the corrugated sheet and the adjacent flat plates are not joined at the inlet end of the gas passage, but are joined to each other at the outlet end so as to be conductive with each other. body. 【請求項２】 請求項１において，平板と波板とは，中
心電極の近くにおいては，入口端及び出口端の両者と
も，隣接する平板と導電可能に接合されていることを特
徴とする加熱式ハニカム構造体。2. The heating apparatus according to claim 1, wherein the flat plate and the corrugated plate are electrically connected to the adjacent flat plate at both the entrance end and the exit end near the center electrode. Type honeycomb structure. 【請求項３】 請求項１において，平板と波板とは，中
心電極の近くにおいては，ガス通路に沿った接触面が導
電可能に接合されていることを特徴とする加熱式ハニカ
ム構造体。3. The heating type honeycomb structure according to claim 1, wherein the flat plate and the corrugated plate have a contact surface along a gas passage conductively joined near the center electrode. 【請求項４】 請求項１において，中心電極は中空体で
あることを特徴とする加熱式ハニカム構造体。4. The heated honeycomb structure according to claim 1, wherein the center electrode is a hollow body.