JP2013144954A - Supporting structure of honeycomb carrier - Google Patents

Supporting structure of honeycomb carrier Download PDF

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JP2013144954A
JP2013144954A JP2012006019A JP2012006019A JP2013144954A JP 2013144954 A JP2013144954 A JP 2013144954A JP 2012006019 A JP2012006019 A JP 2012006019A JP 2012006019 A JP2012006019 A JP 2012006019A JP 2013144954 A JP2013144954 A JP 2013144954A
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honeycomb carrier
case
annular
annular convex
flat portion
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JP5917919B2 (en
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Yoshiaki Hatakeyama
由章 畠山
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Honda Motor Co Ltd
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Honda Motor Co Ltd
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Priority to JP2012006019A priority Critical patent/JP5917919B2/en
Priority to DE102013200342.0A priority patent/DE102013200342B4/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F01N3/24—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by constructional aspects of converting apparatus
    • F01N3/28—Construction of catalytic reactors
    • F01N3/2839—Arrangements for mounting catalyst support in housing, e.g. with means for compensating thermal expansion or vibration
    • F01N3/2842—Arrangements for mounting catalyst support in housing, e.g. with means for compensating thermal expansion or vibration specially adapted for monolithic supports, e.g. of honeycomb type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F01N3/24—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by constructional aspects of converting apparatus
    • F01N3/28—Construction of catalytic reactors
    • F01N3/2839—Arrangements for mounting catalyst support in housing, e.g. with means for compensating thermal expansion or vibration
    • F01N3/2853—Arrangements for mounting catalyst support in housing, e.g. with means for compensating thermal expansion or vibration using mats or gaskets between catalyst body and housing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F01N3/24—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by constructional aspects of converting apparatus
    • F01N3/28—Construction of catalytic reactors
    • F01N3/2839—Arrangements for mounting catalyst support in housing, e.g. with means for compensating thermal expansion or vibration
    • F01N3/2853—Arrangements for mounting catalyst support in housing, e.g. with means for compensating thermal expansion or vibration using mats or gaskets between catalyst body and housing
    • F01N3/286—Arrangements for mounting catalyst support in housing, e.g. with means for compensating thermal expansion or vibration using mats or gaskets between catalyst body and housing the mats or gaskets having corrugations or cavities

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Exhaust Gas After Treatment (AREA)
  • Filtering Of Dispersed Particles In Gases (AREA)
  • Exhaust Gas Treatment By Means Of Catalyst (AREA)

Abstract

PROBLEM TO BE SOLVED: To suppress annular protrusions protruding on an outer periphery of a honeycomb carrier from being damaged at a position of the tops on semicircles of case half bodies, and also suppress a holding member surrounding annular protrusions from biting in joint parts.SOLUTION: In a supporting structure of a honeycomb carrier 2 having the honeycomb carrier 2 having annular protrusions 21 making a round around an outer periphery and protruding an outer diameter direction, a seal mat 3 surrounding the annular protrusions 21, and a case 4 covering the honeycomb carrier 2, having an annular recesses 43 receiving the annular protrusions 21 and concaved in the outer diameter direction, and capable of being bisected on a periphery, and holding the annular protrusion 21 on the annular recesses 43 via the seal mat 3, a gap between and the annular protrusions 21 and the annular recesses 43 located at joint parts 46 jointing the case halves 41, 42 constituted by bisecting the case 4 at the tops 45 on the semicircles of the case halves 41, 42 is larger than in the other parts.

Description

本発明は、ハニカム担体の支持構造に関する。詳しくは、内燃機関の排気に含まれる排気微粒子を捕集したり、ＣＯ、ＨＣ、ＮＯｘ等の有害成分を浄化したりするときに使用するハニカム担体の支持構造に関する。   The present invention relates to a support structure for a honeycomb carrier. More specifically, the present invention relates to a support structure for a honeycomb carrier used for collecting exhaust particulates contained in the exhaust gas of an internal combustion engine or purifying harmful components such as CO, HC, NOx.

従来、ハニカム担体を支持する支持構造として、特許文献１に開示された技術がある。
特許文献１に開示された技術では、周上２分割される筒状容器内と触媒担体とを、触媒担体の外周に沿って配置される保持材を介在させて係合する。このために、筒状容器の内周面には周方向に沿って係合凹部を形成し、触媒担体の外周には周方向に沿って係合凸部を形成し、保持材を介在させて係合凸部を係合凹部に係合する。 Conventionally, there is a technique disclosed in Patent Document 1 as a support structure for supporting a honeycomb carrier.
In the technique disclosed in Patent Document 1, the inside of the cylindrical container divided into two on the circumference and the catalyst carrier are engaged with each other through a holding material arranged along the outer periphery of the catalyst carrier. For this purpose, an engagement recess is formed along the circumferential direction on the inner circumferential surface of the cylindrical container, and an engagement projection is formed along the circumferential direction on the outer periphery of the catalyst carrier, with a holding material interposed. The engaging convex part is engaged with the engaging concave part.

実開昭６３−１１３７１１号公報Japanese Utility Model Publication No. 63-113711

上記特許文献１に開示された技術では、触媒担体が係合凸部を有するため、筒状容器を２分割した容器半体の半周上頂部に位置する係合凸部が、組み立て時に損傷し易くなる。
この原因は、容器半体を合わせるときに、容器半体の半周上頂部に位置する係合凸部に次の３つの面圧が作用して局所的にこの部分の面圧が高くなるためである。これにより、当該係合凸部の損傷が引き起こされる。
ここで３つの面圧とは、
（ａ）保持材が触媒担体の中心方向に押されることに起因する面圧、
（ｂ）保持材が触媒担体の軸方向に引っ張られることに起因する面圧、
（ｃ）保持材が触媒担体の周方向に引っ張られることに起因する面圧、
であり、いずれの面圧も容器半体を触媒担体に被せる際に容器半体から保持材に力が加わるために生じる。 In the technique disclosed in Patent Document 1 above, since the catalyst carrier has an engaging convex portion, the engaging convex portion located on the upper half of the circumference of the half of the container obtained by dividing the cylindrical container is easily damaged during assembly. Become.
This is because when the container halves are put together, the following three surface pressures act on the engaging projections located on the upper half of the container half, and the surface pressure of this part increases locally. is there. This causes damage to the engaging projection.
Here, the three surface pressures are
(A) surface pressure resulting from the holding material being pushed toward the center of the catalyst carrier;
(B) the surface pressure resulting from the holding material being pulled in the axial direction of the catalyst carrier;
(C) the surface pressure resulting from the holding material being pulled in the circumferential direction of the catalyst carrier;
Any surface pressure is generated because force is applied from the container half to the holding member when the container half is covered with the catalyst carrier.

また、筒状容器を２分割した容器半体を合わせる筒状容器の合わせ部において保持材が噛み込み易くなる。
この原因は、容器半体を合わせるときに、保持材が触媒担体の周方向に引っ張られることに伴い、保持材が容器半体の半周上頂部から合わせ部にずれ込み、ずれ込んだ保持材が合わせ部で筒状容器側に盛り上がるためである。これにより、合わせ部において保持材の噛み込みが引き起こされる。 Moreover, it becomes easy to bite the holding material in the mating portion of the cylindrical container that joins the container halves obtained by dividing the cylindrical container into two parts.
The cause of this is that when holding the container halves, the holding material is pulled in the circumferential direction of the catalyst carrier, so that the holding material is displaced from the upper half of the container half to the mating part, and the displaced holding material is moved to the mating part. This is because it rises to the cylindrical container side. This causes the holding material to be bitten at the mating portion.

本発明は上記課題を解決するものであり、その目的は、ハニカム担体の外周上に突出する環状凸部がケース半体の半周上頂部の位置において損傷することを抑制すると共に、環状凸部を囲繞する保持部材が合わせ部において噛み込むことを抑制することにある。   The present invention solves the above-mentioned problems, and the object thereof is to prevent the annular protrusion protruding on the outer periphery of the honeycomb carrier from being damaged at the position of the upper half of the case half, and to prevent the annular protrusion. This is to prevent the surrounding holding member from biting in the mating portion.

（１）外周を１周して外径方向に突出する環状凸部（例えば、後述の環状凸部２１）を有するハニカム担体（例えば、後述のハニカム担体２）と、前記環状凸部を囲繞する保持部材（例えば、後述のシールマット３）と、前記ハニカム担体を覆うケース（例えば、後述のケース４）であって、前記環状凸部を受容する外径方向に凹んだ環状凹部（例えば、後述の環状凹部４３）を有し、周上２分割可能なケースと、を備え、前記環状凸部を、前記保持部材を介在させて前記環状凹部に保持するハニカム担体の支持構造であって、前記ケースを２分割したケース半体（例えば、後述のケース半体４１，４２）を合わせる合わせ部（例えば、後述の合わせ部４６）と、前記ケース半体の半周上頂部（例えば、後述の半周上頂部４５）と、に位置する前記環状凸部と前記環状凹部との間隙を他の部分よりも大きくしたことを特徴とするハニカム担体の支持構造。   (1) A honeycomb carrier (for example, a honeycomb carrier 2 to be described later) having an annular convex portion (for example, a circular convex portion 21 to be described later) projecting in the outer diameter direction around the outer periphery, and the annular convex portion are surrounded. A holding member (for example, a seal mat 3 to be described later) and a case (for example, a case 4 to be described later) covering the honeycomb carrier, and an annular recess (for example, to be described later) recessed in the outer diameter direction for receiving the annular protrusion. A support structure for supporting a honeycomb carrier, wherein the annular convex portion is held in the annular concave portion with the holding member interposed therebetween. An alignment portion (for example, an alignment portion 46 to be described later) for combining case halves (for example, case halves 41 and 42 described later) obtained by dividing the case into two parts, and an upper half portion of the case half (for example, an upper half periphery to be described later) Located on top 45) The support structure of the honeycomb carrier, characterized in that the gap between the annular recess and the annular protrusion is larger than the other portions.

（１）の発明によると、ケース半体の半周上頂部に位置する環状凸部と環状凹部との間隙を他の部分よりも大きくしたことにより、ケース半体をハニカム担体に被せる際にケース半体から保持部材に加わる力が低減する。よって、ケース半体を合わせるときに保持部材からケース半体の半周上頂部に位置する環状凸部に作用する種々の面圧を小さくできる。したがって、環状凸部がケース半体の半周上頂部の位置において損傷することを抑制できる。
また、合わせ部に位置する環状凸部と環状凹部との間隙を他の部分よりも大きくしたことにより、ケース半体を合わせるときの保持部材がハニカム担体の周方向に引っ張られることに伴いケース半体の半周上頂部から合わせ部にずれ込む保持部材を当該間隙に収容できる。よって、ずれ込んだ保持部材が合わせ部でケース側に盛り上がることを抑制できる。したがって、環状凸部を囲繞する保持部材が合わせ部において噛み込むことを抑制できる。 According to the invention of (1), the gap between the annular convex portion and the annular concave portion located at the top of the half circumference of the case half is made larger than the other portions, so that when the case half is covered with the honeycomb carrier, the case half The force applied to the holding member from the body is reduced. Therefore, it is possible to reduce various surface pressures acting on the annular convex portion located on the upper half of the case half from the holding member when matching the case halves. Therefore, it can suppress that an annular convex part is damaged in the position of the half-circumferential upper part of a case half body.
Further, since the gap between the annular convex portion and the annular concave portion located in the mating portion is made larger than the other portions, the holding member when the case halves are joined is pulled in the circumferential direction of the honeycomb carrier. A holding member that shifts from the upper half of the body to the mating portion can be accommodated in the gap. Therefore, it can suppress that the holding member which shifted | deviated rises to the case side in a mating part. Therefore, it can suppress that the holding member surrounding the annular convex part bites in the mating part.

（２）前記ケース半体の半周上頂部に位置する前記環状凸部に、他の部分よりも外径方向の突出量を少なくした第１の平坦部（例えば、後述の第１の平坦部２２）を設けると共に、当該第１の平坦部が設けられた前記環状凸部を受容する前記環状凹部に、他の部分よりも外径方向の凹み量を少なくした第２の平坦部（例えば、後述の第２の平坦部４４）を設けたことを特徴とする（１）に記載のハニカム担体の支持構造。   (2) A first flat portion (for example, a first flat portion 22 to be described later) in which the projecting amount in the outer diameter direction is smaller than other portions on the annular convex portion located on the upper half of the circumference of the case half. ) And a second flat portion (for example, to be described later) in which the concave portion in the outer diameter direction is smaller than the other portion in the annular concave portion that receives the annular convex portion provided with the first flat portion. The support structure for a honeycomb carrier according to (1), wherein the second flat portion 44) is provided.

（２）の発明によると、ケース半体を合わせるときに第１の平坦部と第２の平坦部とを合わせることで位置合わせの目印にでき、ケースとハニカム担体との位置合わせが容易にできる。
また例えケースとハニカム担体との位置合わせが多少ずれたとしても、ケース半体を合わせるときに第１の平坦部が第２の平坦部に合うようにハニカム担体が動かされ、ケースとハニカム担体との位置合わせを精度良く行える。 According to the invention of (2), when the case halves are combined, the first flat portion and the second flat portion can be combined to provide a mark for alignment, and the case and the honeycomb carrier can be easily aligned. .
Even if the case and the honeycomb carrier are slightly misaligned, the honeycomb carrier is moved so that the first flat portion matches the second flat portion when the case halves are aligned, Can be accurately aligned.

（３）前記合わせ部に位置する前記環状凸部に、他の部分よりも外径方向の突出量を少なくした第３の平坦部（例えば、後述の第３の平坦部２３）を設けたことを特徴とする（１）又は（２）に記載のハニカム担体の支持構造。   (3) A third flat portion (for example, a third flat portion 23 to be described later) having a smaller amount of protrusion in the outer diameter direction than the other portions is provided on the annular convex portion located at the mating portion. The support structure for a honeycomb carrier according to (1) or (2).

（３）の発明によると、ケース半体を合わせるときに保持部材は第３の平坦部に案内されてケース半体の合わせ方向と同方向に移動する。これにより、ケース半体が合わさる間際の組み付け荷重が急激に増大することを抑制できる。
また、ケース半体を合わせるときにケース半体の半周上頂部から合わせ部にずれ込む保持部材を第３の平坦部によって大きくした間隙に収容できる。よって、ずれ込んだ保持部材が合わせ部でケース側に盛り上がることを抑制できる。したがって、環状凸部を囲繞する保持部材が合わせ部において噛み込むことを抑制できる。 According to the invention of (3), when the case halves are aligned, the holding member is guided by the third flat portion and moves in the same direction as the alignment direction of the case halves. Thereby, it can suppress that the assembly | attachment load just before a case half body joins increases rapidly.
Further, when the case halves are combined, the holding member that shifts from the upper half of the case halves to the mating portion can be accommodated in the gap that is enlarged by the third flat portion. Therefore, it can suppress that the holding member which shifted | deviated rises to the case side in a mating part. Therefore, it can suppress that the holding member surrounding the annular convex part bites in the mating part.

（４）前記保持部材は、合口（例えば、後述の合口３１）を有し、前記合口は、前記第１の平坦部と前記第２の平坦部との間に配置されることを特徴とする（２）に記載のハニカム担体の支持構造。   (4) The holding member has a joint (for example, a joint 31 described later), and the joint is disposed between the first flat portion and the second flat portion. The support structure for a honeycomb carrier according to (2).

（４）の発明によると、合口は第１の平坦部と第２の平坦部との間の平坦部分に押さえ込まれ、曲面部分等の他の部分よりも合口が開くことを抑制できる。このため、保持部材はシール機能を高く発揮できる。
また、合口は第１の平坦部と第２の平坦部との間に配置されるので、合口を噛み込み等が生じ得る合わせ部に位置させる場合よりも損傷を抑制できる。 According to the invention of (4), the joint is pressed into the flat part between the first flat part and the second flat part, and the joint can be prevented from opening more than other parts such as a curved surface part. For this reason, the holding member can exhibit a high sealing function.
Further, since the abutment is disposed between the first flat portion and the second flat portion, damage can be suppressed as compared with the case where the abutment is positioned at a mating portion where biting or the like may occur.

（５）前記ハニカム担体は、複数のセグメント（例えば、後述のセグメント６）を接合して構成され、前記第１の平坦部又は前記第３の平坦部は、接合したセグメント（例えば、後述のブロック８）の外壁面を利用して構成されることを特徴とする（２）〜（４）のいずれかに記載のハニカム担体の支持構造。   (5) The honeycomb carrier is configured by joining a plurality of segments (for example, a segment 6 described later), and the first flat portion or the third flat portion is a joined segment (for example, a block described later). The support structure for a honeycomb carrier according to any one of (2) to (4), characterized in that the outer wall surface of 8) is used.

（５）の発明によると、ハニカム担体を無駄なく少ないセグメント数で構成できる。これにより、ハニカム担体の製造コストを低減できる。   According to the invention of (5), the honeycomb carrier can be configured with a small number of segments without waste. Thereby, the manufacturing cost of the honeycomb carrier can be reduced.

本発明によれば、ハニカム担体の外周上に突出する環状凸部がケース半体の半周上頂部の位置において損傷することを抑制できると共に、環状凸部を囲繞する保持部材が合わせ部において噛み込むことを抑制できる。   According to the present invention, it is possible to prevent the annular convex portion protruding on the outer periphery of the honeycomb carrier from being damaged at the position of the upper half portion of the case half, and the holding member surrounding the annular convex portion is engaged in the mating portion. This can be suppressed.

本発明の実施形態に係るＤＰＦを示す縦断面図である。It is a longitudinal cross-sectional view which shows DPF which concerns on embodiment of this invention. 上記実施形態に係るＤＰＦを示す横断面図である。It is a cross-sectional view showing the DPF according to the embodiment. 上記実施形態に係るＤＰＦの概略構成を示す斜視図である。It is a perspective view which shows schematic structure of DPF which concerns on the said embodiment. 上記実施形態に係るケースの概略構成を示す斜視図である。It is a perspective view which shows schematic structure of the case which concerns on the said embodiment. 上記実施形態に係るＤＰＦの製造方法を示す図である。It is a figure which shows the manufacturing method of DPF which concerns on the said embodiment. 本発明の他の実施形態に係るＤＰＦを示す横断面図である。It is a cross-sectional view showing a DPF according to another embodiment of the present invention. 本発明の他の実施形態に係るＤＰＦを示す横断面図である。It is a cross-sectional view showing a DPF according to another embodiment of the present invention.

以下に図面を参照して本発明の実施形態を説明する。   Embodiments of the present invention will be described below with reference to the drawings.

＜ＤＰＦ構成＞
図１は、本実施形態に係るハニカム担体の支持構造を適用したＤＰＦ１を示す縦断面図である。図２は、本記実施形態に係るＤＰＦ１を示す横断面図である。図３は、本実施形態に係るＤＰＦ１の概略構成を示す斜視図である。
ＤＰＦ１は、内燃機関の排気通路に配置され、内燃機関から排出される排気中の排気微粒子（ＰＭ）を捕集するものである。
ＤＰＦ１は、ハニカム担体２と、保持部材としてのシールマット３と、ケース４と、を備える。 <DPF configuration>
FIG. 1 is a longitudinal sectional view showing a DPF 1 to which a honeycomb carrier support structure according to this embodiment is applied. FIG. 2 is a cross-sectional view showing the DPF 1 according to the present embodiment. FIG. 3 is a perspective view showing a schematic configuration of the DPF 1 according to the present embodiment.
The DPF 1 is disposed in the exhaust passage of the internal combustion engine and collects exhaust particulates (PM) in the exhaust discharged from the internal combustion engine.
The DPF 1 includes a honeycomb carrier 2, a seal mat 3 as a holding member, and a case 4.

ハニカム担体２は、円柱形状をした排気微粒子捕集用のウォールスルー型であり、炭化ケイ素を材料とする。
ハニカム担体２は、排気流れ方向に隔壁で区画された多数のセルを有し、セルの両端面は隣接するセルと交互に一方の端面及び他方の端面が封止されている。ハニカム担体２には、円柱形状における排気流れ方向上流側に開口したセルから排気が流入し、隣接するセル間の隔壁を排気が通過する際に排気微粒子が捕集され、隔壁を通過し排気微粒子が除去された排気が円柱形状における排気流れ方向下流側に開口したセルから流出する。 The honeycomb carrier 2 is a wall-through type for collecting exhaust particulates having a cylindrical shape, and is made of silicon carbide.
The honeycomb carrier 2 has a large number of cells partitioned by partition walls in the exhaust flow direction, and both end surfaces of the cells are sealed with one end surface and the other end surface alternately with adjacent cells. In the honeycomb carrier 2, exhaust gas flows from cells opened upstream in the exhaust flow direction in the columnar shape, and exhaust particles are collected when the exhaust gas passes through the partition walls between adjacent cells. The exhaust gas from which the gas has been removed flows out from a cell that is open downstream in the exhaust gas flow direction in the cylindrical shape.

このハニカム担体２には、円柱形状における外周面の軸線方向の略中央に、外周を１周して外径方向に突出する環状凸部２１が設けられている。環状凸部２１は、ハニカム担体２がケース４にずれなく固定されるために設けられる。   The honeycomb carrier 2 is provided with an annular convex portion 21 that makes one round of the outer periphery and protrudes in the outer diameter direction at substantially the center in the axial direction of the outer peripheral surface of the columnar shape. The annular convex portion 21 is provided so that the honeycomb carrier 2 is fixed to the case 4 without deviation.

環状凸部２１には、第１の平坦部２２及び第３の平坦部２３が９０°間隔を空けてそれぞれ２つ形成される。
第１の平坦部２２及び第３の平坦部２３は、環状凸部２１の他の部分よりも外径方向の突出量を少なくして設けられる。 In the annular convex portion 21, two first flat portions 22 and three third flat portions 23 are formed with an interval of 90 °.
The first flat portion 22 and the third flat portion 23 are provided with a protruding amount in the outer diameter direction smaller than the other portions of the annular convex portion 21.

シールマット３は、ハニカム担体２の環状凸部２１を、環状凸部２１と同様に外周を１周して囲繞する。シールマット３は、環状凸部２１の幅よりも一回り大きく、環状凸部２１の全体を覆う。
シールマット３には、耐熱、耐振性、シール機能及び振動吸収能力を有するアルミナ繊維、シリカ繊維、アルミナシリカ繊維、ガラス繊維等のセラミック繊維を用いる。
シールマット３には合口３１があり、合口３１を構成する両端部３２，３３は相互に組み合わされるＬ型に形成されている（図５（ｉ）参照）。Ｌ型の端部とは、端部の中央を２分して一方の半分が突出し他方の半分が後退しているものである。 The seal mat 3 surrounds the annular convex portion 21 of the honeycomb carrier 2 around the outer periphery in the same manner as the annular convex portion 21. The seal mat 3 is slightly larger than the width of the annular protrusion 21 and covers the entire annular protrusion 21.
For the seal mat 3, ceramic fibers such as alumina fiber, silica fiber, alumina silica fiber, and glass fiber having heat resistance, vibration resistance, sealing function, and vibration absorption capability are used.
The seal mat 3 has an abutment 31, and both end portions 32 and 33 constituting the abutment 31 are formed in an L shape that is combined with each other (see FIG. 5 (i)). The L-shaped end portion is a portion in which the center of the end portion is divided into two and one half protrudes and the other half recedes.

ケース４は、シールマット３を介在させてハニカム担体２を覆う。ケース４は、周上２分割可能ないわゆるクラムシェル型であり、ケース４を２分割したケース半体４１，４２を合わせて溶接することで形成されている。
ケース半体４１，４２の合わせ部分には、溶接固定のためのフランジ部４１ａ，４１ｂ，４２ａ，４２ｂが形成されている。 The case 4 covers the honeycomb carrier 2 with the seal mat 3 interposed therebetween. The case 4 is a so-called clamshell type that can be divided into two parts on the circumference, and is formed by welding together the case halves 41 and 42 obtained by dividing the case 4 into two parts.
Flange portions 41a, 41b, 42a, and 42b for welding and fixing are formed at the mating portions of the case halves 41 and.

図４は、本実施形態に係るケース４の概略構成を示す斜視図である。
このケース４には、図４に示すように外周面の軸線方向の略中央に、ハニカム担体２の環状凸部２１を受容する外周を１周して外径方向に凹んだ環状凹部４３が設けられている。
環状凹部４３は、ハニカム担体２の環状凸部２１を受け入れ、ハニカム担体２のケース４に対する相対的な軸線方向のずれをなくし、ハニカム担体２がケース４に固定されるために設けられる。
また環状凹部４３がハニカム担体２の環状凸部２１を受け入れる際に、シールマット３を介在させることで、シールマット３はシール機能や振動吸収能力を発揮する。 FIG. 4 is a perspective view showing a schematic configuration of the case 4 according to the present embodiment.
As shown in FIG. 4, the case 4 is provided with an annular recess 43 that is recessed in the outer diameter direction around the outer periphery that receives the annular projection 21 of the honeycomb carrier 2 at the approximate center in the axial direction of the outer peripheral surface. It has been.
The annular recess 43 is provided to receive the annular protrusion 21 of the honeycomb carrier 2, eliminate a relative axial shift of the honeycomb carrier 2 with respect to the case 4, and fix the honeycomb carrier 2 to the case 4.
Further, when the annular concave portion 43 receives the annular convex portion 21 of the honeycomb carrier 2, the seal mat 3 exhibits a sealing function and a vibration absorbing capability by interposing the seal mat 3.

環状凹部４３には、第２の平坦部４４が１８０°間隔を空けて２つ形成される。すなわち、第２の平坦部４４は、ケース４を２分割したケース半体４１，４２の半周上頂部４５の位置に形成される。
第２の平坦部４４は、環状凹部４３の他の部分よりも外径方向の凹み量を少なくして設けられる。第２の平坦部４４は、ハニカム担体２の環状凸部２１に形成された第１の平坦部２２に対応しており、第２の平坦部４４の大きさは、第２の平坦部４４と対向する第１の平坦部２２とほぼ等しいものである。 In the annular recess 43, two second flat portions 44 are formed at an interval of 180 °. That is, the second flat portion 44 is formed at the position of the upper half portion 45 of the case halves 41 and 42 obtained by dividing the case 4 into two.
The second flat portion 44 is provided with a smaller amount of recess in the outer diameter direction than the other portions of the annular recess 43. The second flat portion 44 corresponds to the first flat portion 22 formed on the annular convex portion 21 of the honeycomb carrier 2, and the size of the second flat portion 44 is the same as that of the second flat portion 44. It is substantially equal to the opposing first flat portion 22.

ここでケース４は、ハニカム担体２に対し、第１の平坦部２２と第２の平坦部４４とが対向したケース半体４１，４２の半周上頂部４５に位置する環状凸部２１と環状凹部４３との間隙が他の部分よりも大きくなるような大きさである。
また同時にケース４は、ハニカム担体２に対し、両ケース半体４１，４２を合わせた合わせ部４６にハニカム担体の第３の平坦部が位置すると、合わせ部４６に位置する環状凸部２１と環状凹部４３との間隙が他の部分よりも大きくなるように、合わせ部４６の位置が外側へ膨らんでいる。
つまり、第１の平坦部２２と第２の平坦部４４とが対向したケース半体４１，４２の半周上頂部４５に位置する環状凸部２１と環状凹部４３との間隙、及び、第３の平坦部が配置される合わせ部４６に位置する環状凸部２１と環状凹部４３との間隙が、他の部分よりも大きい。 Here, the case 4 has an annular convex portion 21 and an annular concave portion which are located on the upper half portion 45 of the case halves 41 and 42 in which the first flat portion 22 and the second flat portion 44 face the honeycomb carrier 2. It is a magnitude | size which the gap | interval with 43 becomes larger than another part.
At the same time, when the third flat portion of the honeycomb carrier is positioned at the mating portion 46 where the two case halves 41 and 42 are combined with the honeycomb carrier 2, the case 4 and the annular convex portion 21 positioned at the mating portion 46 are annular. The position of the mating portion 46 bulges outward so that the gap with the recess 43 is larger than other portions.
That is, the gap between the annular convex portion 21 and the annular concave portion 43 located on the upper half portion 45 of the case halves 41, 42 where the first flat portion 22 and the second flat portion 44 face each other, and the third The gap between the annular convex portion 21 and the annular concave portion 43 located at the mating portion 46 where the flat portion is disposed is larger than the other portions.

そしてＤＰＦ１は、ハニカム担体２にシールマット３を巻いた後、このハニカム担体２の両側から２つのケース半体４１，４２を被せ合わせ、両ケース半体４１，４２を溶接により接合することで形成される。
このとき図２に示すように、ケース半体４１，４２の第２の平坦部４４とハニカム担体２の第１の平坦部２２の位置が合わせられ、第１の平坦部２２と第２の平坦部４４とが対向したケース半体４１，４２の半周上頂部４５に位置する環状凸部２１と環状凹部４３との間隙が他の部分よりも大きくなっている。
また図２に示すように、両ケース半体４１，４２を合わせた合わせ部４６にハニカム担体２の第３の平坦部２３が位置し両ケース半体４１，４２が外側へ膨らんでいるので、合わせ部４６に位置する環状凸部２１と環状凹部４３との間隙が他の部分よりも大きくなっている。
また図２に示すように、シールマット３の合口３１は、第１の平坦部２２と第２の平坦部４４との間に配置される。 The DPF 1 is formed by winding the seal mat 3 around the honeycomb carrier 2 and then covering the two case halves 41 and 42 from both sides of the honeycomb carrier 2 and joining the two case halves 41 and 42 by welding. Is done.
At this time, as shown in FIG. 2, the positions of the second flat portion 44 of the case halves 41 and 42 and the first flat portion 22 of the honeycomb carrier 2 are aligned, and the first flat portion 22 and the second flat portion 22 are aligned. The gap between the annular convex portion 21 and the annular concave portion 43 located on the upper half portion 45 of the case halves 41 and 42 facing the portion 44 is larger than the other portions.
Further, as shown in FIG. 2, the third flat portion 23 of the honeycomb carrier 2 is located in the mating portion 46 where the case halves 41 and 42 are combined, and the case halves 41 and 42 swell outward. The gap between the annular convex portion 21 and the annular concave portion 43 located in the mating portion 46 is larger than the other portions.
As shown in FIG. 2, the joint 31 of the seal mat 3 is disposed between the first flat portion 22 and the second flat portion 44.

＜ＤＰＦ製造方法＞
以上の構成を備えるＤＰＦ１は、次のように製造される。図５は、本実施形態に係るＤＰＦ１の製造方法を示す図である。 <DPF manufacturing method>
The DPF 1 having the above configuration is manufactured as follows. FIG. 5 is a diagram showing a method for manufacturing the DPF 1 according to the present embodiment.

まず、図５（ａ）に示すようにセグメント６を用意する。セグメント６は、ハニカム担体２の一部を構成する部材であり、隔壁で区画された多数のセルを有し、セルの両端面は隣接するセルと交互に一方の端面及び他方の端面が封止されている。セグメント６は、軸線方向はハニカム担体２と等しい長さの四角柱形状である。セグメント６は、ハニカム担体２が構成可能な数だけ用意される。   First, a segment 6 is prepared as shown in FIG. The segment 6 is a member constituting a part of the honeycomb carrier 2 and has a large number of cells partitioned by partition walls, and both end faces of the cells are alternately sealed with adjacent end faces and one end face and the other end face. Has been. The segment 6 has a quadrangular prism shape with the same length as the honeycomb carrier 2 in the axial direction. As many segments 6 as the number of the honeycomb carriers 2 that can be configured are prepared.

次に、図５（ｂ）に示すようにセグメント６に接合材７を塗布する。   Next, a bonding material 7 is applied to the segment 6 as shown in FIG.

次に、図５（ｃ）に示すように接合材７を塗布したセグメント６を組み立てる。   Next, as shown in FIG.5 (c), the segment 6 which apply | coated the joining material 7 is assembled.

図５（ｄ）に示すように接合材７を塗布したセグメント６が組み立てられ、ハニカム担体２が構成可能な大きさのブロック８、すなわち接合したセグメントが形成される。   As shown in FIG. 5D, the segments 6 to which the bonding material 7 is applied are assembled, and the blocks 8 having a size that allows the honeycomb carrier 2 to be formed, that is, the bonded segments are formed.

次に、図５（ｅ）に示すようにブロック８に対し、切削加工を行う。図５（ｅ）では、ブロック８におけるハニカム担体２の環状凸部２１が形成される部位を境界に、境界の一方側に円柱形状を切削加工により形成する。   Next, cutting is performed on the block 8 as shown in FIG. In FIG. 5 (e), a columnar shape is formed by cutting on one side of the boundary with the portion where the annular convex portion 21 of the honeycomb carrier 2 is formed in the block 8 as a boundary.

次に、図５（ｆ）に示すようにブロック８に対し、切削加工を行う。図５（ｆ）では、ブロック８におけるハニカム担体２の環状凸部２１が形成される部位を境界に、図５（ｅ）とは反対側に円柱形状を切削加工により形成する。   Next, cutting is performed on the block 8 as shown in FIG. In FIG. 5 (f), a columnar shape is formed by cutting on the opposite side to FIG. 5 (e) with the portion where the annular convex portion 21 of the honeycomb carrier 2 is formed in the block 8 as a boundary.

ここで、ハニカム担体２の環状凸部２１の第１の平坦部２２及び第３の平坦部２３は、ブロック８、すなわち接合したセグメントの外壁面を利用して構成される。
言い換えると、ハニカム担体２の環状凸部２１の第１の平坦部２２及び第３の平坦部２３は、切削加工がなるべく必要ないように、ブロック８の外壁面をなるべくそのまま用いて形成される。 Here, the 1st flat part 22 and the 3rd flat part 23 of the cyclic | annular convex part 21 of the honeycomb support | carrier 2 are comprised using the outer wall surface of the block 8, ie, the joined segment.
In other words, the first flat portion 22 and the third flat portion 23 of the annular convex portion 21 of the honeycomb carrier 2 are formed by using the outer wall surface of the block 8 as much as possible so that cutting is not necessary.

次に、図５（ｇ）に示すようにブロック８に対し、ハニカム担体２の環状凸部２１の高さ調整を行う。図５（ｇ）では、ブロック８におけるハニカム担体２の環状凸部２１の第１の平坦部２２及び第３の平坦部２３以外の曲面である他の部分を、第１の平坦部２２及び第３の平坦部２３よりも突出量（径）が大きくなるよう形成する。
言い換えると、ブロック８におけるハニカム担体２の環状凸部２１の第１の平坦部２２及び第３の平坦部２３以外の曲面である他の部分に対応する角部８１を、第１の平坦部２２及び第３の平坦部２３が残るように削る。
これにより、ハニカム担体２が完成する。 Next, as shown in FIG. 5G, the height of the annular convex portion 21 of the honeycomb carrier 2 is adjusted with respect to the block 8. In FIG. 5G, other portions that are curved surfaces other than the first flat portion 22 and the third flat portion 23 of the annular convex portion 21 of the honeycomb carrier 2 in the block 8 are replaced with the first flat portion 22 and the first flat portion 22. 3 is formed so that the protruding amount (diameter) is larger than that of the flat portion 23.
In other words, the corner portion 81 corresponding to the other flat portion other than the first flat portion 22 and the third flat portion 23 of the annular convex portion 21 of the honeycomb carrier 2 in the block 8 is replaced with the first flat portion 22. Then, the third flat portion 23 is cut so as to remain.
Thereby, the honeycomb carrier 2 is completed.

次に、図５（ｈ）に示すようにハニカム担体２に対し、シール材９の塗布を行う。図５（ｈ）では、シール材９は、ハニカム担体２の外周全面に塗布される。   Next, as shown in FIG. 5 (h), the sealing material 9 is applied to the honeycomb carrier 2. In FIG. 5 (h), the sealing material 9 is applied to the entire outer periphery of the honeycomb carrier 2.

次に、図５（ｉ）に示すようにハニカム担体２に対し、シールマット３を巻く。図５（ｉ）では、シールマット３は、ハニカム担体２の環状凸部２１を囲繞する。
この際、シールマット３の合口３１を構成するＬ型の両端部３２，３３が、ハニカム担体２の環状凸部２１の第１の平坦部２２の位置で、一端部３２の半分が突出した部分を他端部３３の半分が後退した部分に合わせ、同様に他端部３３の半分が突出した部分を一端部３２の半分が後退した部分に合わせ、相互に組み合わす。これにより、シールマット３の合口３１がハニカム担体２の環状凸部２１の第１の平坦部２２に配置される。 Next, the seal mat 3 is wound around the honeycomb carrier 2 as shown in FIG. In FIG. 5 (i), the seal mat 3 surrounds the annular convex portion 21 of the honeycomb carrier 2.
At this time, the L-shaped end portions 32 and 33 constituting the joint 31 of the seal mat 3 are portions where the half of the one end portion 32 protrudes at the position of the first flat portion 22 of the annular convex portion 21 of the honeycomb carrier 2. Is aligned with the portion where the half of the other end portion 33 is retracted, and similarly, the portion where the half of the other end portion 33 is protruded is aligned with the portion where the half of the one end portion 32 is retracted. Thereby, the abutment 31 of the seal mat 3 is arranged on the first flat portion 22 of the annular convex portion 21 of the honeycomb carrier 2.

次に、図５（ｊ）に示すようにシールマット３が巻かれたハニカム担体２に対し、ケース４を２分割したケース半体４１，４２を被せ、両ケース半体４１，４２を合わせる。図５（ｊ）では、ケース半体４１，４２は、自身の有する半周上頂部４５に位置する第２の平坦部４４をハニカム担体２の環状凸部２１の第１の平坦部２２に位置合わせして嵌め込む。すなわち、第１の平坦部２２と第２の平坦部４４とを合わせることで位置合わせの目印にする。
またこのとき、ケース４とハニカム担体２との位置合わせが多少ずれたとしても、ケース半体４１，４２を合わせるときに第１の平坦部２２が第２の平坦部４４に合うようにハニカム担体２が動かされ、ケース４とハニカム担体２とが精度良く位置合わせされる。 Next, as shown in FIG. 5 (j), the case carrier 41 and 42 obtained by dividing the case 4 into two parts are put on the honeycomb carrier 2 around which the seal mat 3 is wound, and the two case halves 41 and 42 are combined. In FIG. 5 (j), the case halves 41, 42 align the second flat part 44 located on the upper half part 45 of the case half with the first flat part 22 of the annular convex part 21 of the honeycomb carrier 2. And fit. That is, the first flat portion 22 and the second flat portion 44 are combined to form a mark for alignment.
Further, at this time, even if the alignment between the case 4 and the honeycomb carrier 2 is slightly shifted, the honeycomb carrier so that the first flat portion 22 is aligned with the second flat portion 44 when the case halves 41 and 42 are aligned. 2 is moved, and the case 4 and the honeycomb carrier 2 are aligned with high accuracy.

このとき、ケース半体４１，４２の半周上頂部４５に位置する環状凸部２１と環状凹部４３との間隙を他の部分よりも大きくしたことにより、ケース半体４１，４２をハニカム担体２に被せる際にケース半体４１，４２からシールマット３に加わる力が低減する。よって、ケース半体を合わせるときにシールマット３からケース半体４１，４２の半周上頂部４５に位置する環状凸部２１に作用する以下の（ａ）、（ｂ）、（ｃ）の３つの面圧を小さくできる。
ここで３つの面圧とは、
（ａ）シールマット３がハニカム担体２の中心方向に押されることに起因する面圧、
（ｂ）シールマット３がハニカム担体２の軸方向に引っ張られることに起因する面圧、
（ｃ）シールマット３がハニカム担体２の周方向に引っ張られることに起因する面圧、
であり、いずれの面圧もケース半体４１，４２をハニカム担体２に被せる際にケース半体４１，４２からシールマット３に力が加わるために生じる。
したがって、環状凸部がケース半体の半周上頂部の位置において損傷することを抑制できる。 At this time, the case halves 41 and 42 are formed in the honeycomb carrier 2 by making the gap between the annular convex portion 21 and the annular concave portion 43 located at the upper half portion 45 of the case halves 41 and 42 larger than the other portions. The force applied to the seal mat 3 from the case halves 41 and 42 when covered is reduced. Therefore, when the case halves are put together, the following three (a), (b), and (c) acting on the annular convex portion 21 located on the upper half portion 45 of the case halves 41 and 42 from the seal mat 3 are performed. The surface pressure can be reduced.
Here, the three surface pressures are
(A) Contact pressure caused by the seal mat 3 being pushed toward the center of the honeycomb carrier 2;
(B) the surface pressure caused by the seal mat 3 being pulled in the axial direction of the honeycomb carrier 2;
(C) the surface pressure resulting from the sealing mat 3 being pulled in the circumferential direction of the honeycomb carrier 2;
Both surface pressures are generated because a force is applied from the case halves 41 and 42 to the seal mat 3 when the case halves 41 and 42 are covered with the honeycomb carrier 2.
Therefore, it can suppress that an annular convex part is damaged in the position of the half-circumferential upper part of a case half body.

そして、ケース半体４１，４２を合わせるときにシールマット３は第３の平坦部２３に案内されてケース半体４１，４２の合わせ方向と同方向に移動する。これにより、ケース半体４１，４２を合わせるときにシールマット３の移動がスムーズに行え、ケース半体４１，４２が合わさる間際にシールマット３の移動が阻害されることに起因して組み付け荷重が急激に増大することが抑制される。   When the case halves 41 and 42 are aligned, the seal mat 3 is guided by the third flat portion 23 and moves in the same direction as the alignment direction of the case halves 41 and 42. Accordingly, the seal mat 3 can be smoothly moved when the case halves 41 and 42 are combined, and the assembly load is reduced due to the movement of the seal mat 3 being inhibited just before the case halves 41 and 42 are combined. Rapid increase is suppressed.

また、合わせ部４６に位置する環状凸部２１と環状凹部４３との間隙を他の部分よりも大きくしたことにより、ケース半体４１，４２を合わせるときのシールマット３がハニカム担体２の周方向に引っ張られることに伴いケース半体４１，４２を合わせるときにケース半体４１，４２の半周上頂部４５から合わせ部４６にずれ込むシールマット３が、第３の平坦部２３によってより大きくした合わせ部４６の間隙に収容される。よって、ずれ込んだシールマット３が合わせ部４６でケース４側に盛り上がることが抑制される。したがって、環状凸部２１を囲繞するシールマット３が合わせ部４６において噛み込むことが抑制される。   Further, since the gap between the annular convex portion 21 and the annular concave portion 43 positioned at the mating portion 46 is made larger than that of the other portions, the seal mat 3 when mating the case halves 41 and 42 is arranged in the circumferential direction of the honeycomb carrier 2. When the case halves 41 and 42 are joined together when the case halves 41 and 42 are joined together, the seal mat 3 that shifts from the half-periphery top 45 of the case halves 41 and 42 to the mating part 46 is made larger by the third flat part 23. 46 is accommodated in the gap. Therefore, it is possible to prevent the slipped seal mat 3 from rising to the case 4 side at the mating portion 46. Therefore, the seal mat 3 surrounding the annular convex portion 21 is suppressed from being bitten at the mating portion 46.

これにより、シールマット３の合口３１が、ハニカム担体２の環状凸部２１の第１の平坦部２２とケース半体４１，４２の半周上頂部４５に位置する第２の平坦部４４との間に配置される。このため、合口３１は第１の平坦部２２と第２の平坦部４４との間の平坦部分に押さえ込まれ、曲面部分等の他の部分よりも合口３１が開くことが抑制される。
また、合口３１は第１の平坦部２２と第２の平坦部４４との間に配置されるので、合口３１を噛み込み等が生じ得る合わせ部４６に位置させる場合よりも損傷が抑制される。 As a result, the joint 31 of the seal mat 3 is between the first flat portion 22 of the annular convex portion 21 of the honeycomb carrier 2 and the second flat portion 44 located at the upper half portion 45 of the case halves 41 and 42. Placed in. For this reason, the abutment 31 is pressed into a flat portion between the first flat portion 22 and the second flat portion 44, and the abutment 31 is prevented from opening more than other portions such as a curved surface portion.
Further, since the abutment 31 is disposed between the first flat portion 22 and the second flat portion 44, damage is suppressed as compared with the case where the abutment 31 is positioned at the mating portion 46 where biting or the like may occur. .

次に、図５（ｋ）に示すように、合わせたケース半体４１，４２同士を一体化する。図５（ｋ）では、ケース半体４１，４２同士は、合わせ部４６において溶接固定されて一体化されケース４を構成する。これにより、ＤＰＦ１が完成する。   Next, as shown in FIG. 5 (k), the combined case halves 41, 42 are integrated. In FIG. 5 (k), the case halves 41 and 42 are welded and fixed together at the mating portion 46 to form the case 4. Thereby, DPF1 is completed.

以上の本実施形態に係るＤＰＦ１によれば、以下の効果を奏する。
（１）ケース半体４１，４２の半周上頂部４５に位置する環状凸部２１と環状凹部４３との間隙を他の部分よりも大きくしたことにより、ケース半体４１，４２をハニカム担体２に被せる際にケース半体４１，４２からシールマット３に加わる力が低減する。よって、ケース半体４１，４２を合わせるときにシールマット３からケース半体４１，４２の半周上頂部４５に位置する環状凸部２１に作用する種々の面圧を小さくできる。したがって、環状凸部２１がケース半体４１，４２の半周上頂部４５の位置において損傷することを抑制できる。
また、合わせ部４６に位置する環状凸部２１と環状凹部４３との間隙を他の部分よりも大きくしたことにより、ケース半体４１，４２を合わせるときのシールマット３がハニカム担体２の周方向に引っ張られることに伴いケース半体４１，４２の半周上頂部４５から合わせ部４６にずれ込むシールマット３を当該間隙に収容できる。よって、ずれ込んだシールマット３が合わせ部４６でケース４側に盛り上がることを抑制できる。したがって、環状凸部２１を囲繞するシールマット３が合わせ部４６において噛み込むことを抑制できる。 The DPF 1 according to the present embodiment described above has the following effects.
(1) The case halves 41 and 42 are formed on the honeycomb carrier 2 by making the gap between the annular convex portion 21 and the annular concave portion 43 located on the upper half portion 45 of the case halves 41 and 42 larger than the other portions. The force applied to the seal mat 3 from the case halves 41 and 42 when covered is reduced. Therefore, when the case halves 41 and 42 are combined, various surface pressures acting on the annular convex portion 21 located on the upper half portion 45 of the case halves 41 and 42 from the seal mat 3 can be reduced. Therefore, it can suppress that the cyclic | annular convex part 21 is damaged in the position of the semicircular upper top part 45 of case half bodies 41 and 42. FIG.
Further, since the gap between the annular convex portion 21 and the annular concave portion 43 located in the mating portion 46 is made larger than the other portions, the seal mat 3 when the case halves 41 and 42 are mated is arranged in the circumferential direction of the honeycomb carrier 2. Accordingly, the seal mat 3 that is displaced from the upper half portion 45 of the case halves 41 and 42 to the mating portion 46 can be accommodated in the gap. Therefore, it is possible to suppress the slipped seal mat 3 from rising to the case 4 side at the mating portion 46. Therefore, the seal mat 3 surrounding the annular convex portion 21 can be prevented from being bitten at the mating portion 46.

（２）ケース半体４１，４２を合わせるときに第１の平坦部２２と第２の平坦部４４とを合わせることで位置合わせの目印にでき、ケース４とハニカム担体２との位置合わせが容易にできる。
また例えケース４とハニカム担体２との位置合わせが多少ずれたとしても、ケース半体４１，４２を合わせるときに第１の平坦部２２が第２の平坦部４４に合うようにハニカム担体２が動かされ、ケース４とハニカム担体２との位置合わせを精度良く行える。 (2) When the case halves 41 and 42 are aligned, the first flat portion 22 and the second flat portion 44 can be aligned to provide alignment marks, and the case 4 and the honeycomb carrier 2 can be easily aligned. Can be.
Further, even if the alignment between the case 4 and the honeycomb carrier 2 is slightly shifted, the honeycomb carrier 2 is arranged so that the first flat portion 22 and the second flat portion 44 are aligned when the case halves 41 and 42 are aligned. It is moved, and the alignment between the case 4 and the honeycomb carrier 2 can be performed with high accuracy.

（３）ケース半体４１，４２を合わせるときにシールマット３は第３の平坦部２３に案内されてケース半体４１，４２の合わせ方向と同方向に移動する。これにより、ケース半体４１，４２が合わさる間際の組み付け荷重が急激に増大することを抑制できる。
また、ケース半体４１，４２を合わせるときにケース半体４１，４２の半周上頂部４５から合わせ部４６にずれ込むシールマット３を第３の平坦部２３によって大きくした間隙に収容できる。よって、ずれ込んだシールマット３が合わせ部４６でケース４側に盛り上がることを抑制できる。したがって、環状凸部２１を囲繞するシールマット３が合わせ部４６において噛み込むことを抑制できる。 (3) When mating the case halves 41 and 42, the seal mat 3 is guided by the third flat portion 23 and moves in the same direction as the case halves 41 and 42 are mated. Thereby, it can suppress that the assembly | attachment load just before the case half bodies 41 and 42 joins increases rapidly.
Further, when mating the case halves 41, 42, the seal mat 3 that shifts from the half-periphery top 45 of the case halves 41, 42 to the mating portion 46 can be accommodated in the gap increased by the third flat portion 23. Therefore, it is possible to suppress the slipped seal mat 3 from rising to the case 4 side at the mating portion 46. Therefore, the seal mat 3 surrounding the annular convex portion 21 can be prevented from being bitten at the mating portion 46.

（４）合口３１は第１の平坦部２２と第２の平坦部４４との間の平坦部分に押さえ込まれ、曲面部分等の他の部分よりも合口３１が開くことを抑制できる。このため、シールマット３はシール機能を高く発揮できる。
また、合口３１は第１の平坦部２２と第２の平坦部４４との間に配置されるので、合口３１を噛み込み等が生じ得る合わせ部４６に位置させる場合よりも損傷を抑制できる。 (4) The abutment 31 is pressed into a flat portion between the first flat portion 22 and the second flat portion 44, and the abutment 31 can be prevented from opening more than other portions such as a curved surface portion. For this reason, the seal mat 3 can exhibit a high sealing function.
Moreover, since the abutment 31 is disposed between the first flat portion 22 and the second flat portion 44, damage can be suppressed as compared with the case where the abutment 31 is positioned at the abutting portion 46 where biting or the like may occur.

（５）ハニカム担体２を無駄なく少ないセグメント数で構成できる。これにより、ハニカム担体２の製造コストを低減できる。   (5) The honeycomb carrier 2 can be configured with a small number of segments without waste. Thereby, the manufacturing cost of the honeycomb carrier 2 can be reduced.

なお、本発明は上記実施形態に限定されず、本発明の目的を達成できる範囲で変形、改良等を行っても、本発明の範囲に包含される。   Note that the present invention is not limited to the above-described embodiment, and modifications, improvements, and the like within the scope that can achieve the object of the present invention are included in the scope of the present invention.

上記実施形態では、ケース半体の半周上頂部の位置に第２の平坦部を設けていたが、本発明としては設けなくてもよい。
図６及び図７は、本発明の他の実施形態に係るＤＰＦ１ａ，１ｂを示す横断面図である。
図６に示すＤＰＦ１ａは、ハニカム担体２及びケース４の横断面が楕円形状であり、ケース半体４１，４２の半周上頂部４５の位置に第２の平坦部４４を設けていない。
図７に示すＤＰＦ１ｂは、ハニカム担体２及びケース４の横断面が真円形状であり、ケース半体４１，４２の半周上頂部４５の位置に第２の平坦部４４を設けていない。
これらのように、ケース半体の半周上頂部４５に位置する環状凸部２１と環状凹部４３との間隙を他の部分よりも大きく設けてあればよい。
またこれらのように、ＤＰＦの横断面は真円形状や楕円形状であるとよい。 In the said embodiment, although the 2nd flat part was provided in the position of the semicircular upper top part of a case half body, it does not need to provide as this invention.
6 and 7 are cross-sectional views showing DPFs 1a and 1b according to other embodiments of the present invention.
In the DPF 1 a shown in FIG. 6, the honeycomb carrier 2 and the case 4 have an elliptical cross section, and the second flat portion 44 is not provided at the position of the upper half portion 45 of the case halves 41 and 42.
In the DPF 1b shown in FIG. 7, the cross section of the honeycomb carrier 2 and the case 4 is a perfect circle, and the second flat portion 44 is not provided at the position of the upper half portion 45 of the case halves 41 and 42.
As described above, the gap between the annular convex portion 21 and the annular concave portion 43 located on the upper half portion 45 of the case half may be larger than the other portions.
Moreover, like these, it is good for the cross section of DPF to be a perfect circle shape or an ellipse shape.

ハニカム担体は、上記実施形態では排気微粒子捕集用に適したウォールスルー型としたが、ＣＯ、ＨＣ、ＮＯｘ等の有害成分を浄化する排気浄化用に適したフロースルー型であってもよい。
ハニカム担体の材料は、上記実施形態では炭化ケイ素であったが、コーディエライト、ムライト、アルミノチタネートであってもよい。
保持部材は、上記実施形態ではアルミナ繊維、シリカ繊維、アルミナシリカ繊維、ガラス繊維等のセラミック繊維からなるとしたが、ワイヤメッシュからなるものであってもよい。ただし、保持部材にワイヤメッシュを用いた場合には、ハニカム担体とケースとの間に別途シール部材を設けてガスリークを防止することが望ましい。
保持部材としてのシールマットの端部は、上記実施形態ではＬ型の端部であったが、一端部が凸型であり他端部がこの凸型の一端部に組み合わされる凹型であってもよい。またシールマットの両端部は、相互に組み合わさり合口を構成できるものであればこれに限られない。
ハニカム担体の環状凸部の第１の平坦部及び第３の平坦部は、ブロック、すなわち接合したセグメントの外壁面を利用して構成されるとの意味には、外壁面をそのまま利用する場合だけでなく、少し外壁面を削ってもよい。つまり、接合したセグメントの外壁面を第１の平坦部及び第３の平坦部に対応させることができればよい。 The honeycomb carrier is a wall-through type suitable for collecting exhaust particulates in the above embodiment, but may be a flow-through type suitable for exhaust purification that purifies harmful components such as CO, HC, and NOx.
The material of the honeycomb carrier is silicon carbide in the above embodiment, but may be cordierite, mullite, or aluminotitanate.
The holding member is made of ceramic fibers such as alumina fibers, silica fibers, alumina silica fibers, and glass fibers in the above embodiment, but may be made of wire mesh. However, when a wire mesh is used for the holding member, it is desirable to provide a separate sealing member between the honeycomb carrier and the case to prevent gas leakage.
The end portion of the seal mat as the holding member is an L-shaped end portion in the above-described embodiment, but one end portion is a convex shape and the other end portion is a concave shape combined with the one end portion of the convex shape. Good. Moreover, the both ends of a seal mat will not be restricted to this if it can mutually combine and can comprise a joint.
The first flat portion and the third flat portion of the annular convex portion of the honeycomb carrier are configured using the outer wall surface of the block, that is, the joined segment, only when the outer wall surface is used as it is. In addition, the outer wall surface may be slightly shaved. That is, it is only necessary that the outer wall surfaces of the joined segments can correspond to the first flat portion and the third flat portion.

１…ＤＰＦ
２…ハニカム担体
２１…環状凸部
２２…第１の平坦部
２３…第３の平坦部
３…シールマット（保持部材）
３１…合口
４…ケース
４１，４２…ケース半体
４１ａ，４１ｂ，４２ａ，４２ｂ…フランジ部
４３…環状凹部
４４…第２の平坦部
４５…半周上頂部
４６…合わせ部
６…セグメント
７…接合材
８…ブロック（接合したセグメント）
８１…角部 1 ... DPF
DESCRIPTION OF SYMBOLS 2 ... Honeycomb carrier 21 ... Ring-shaped convex part 22 ... 1st flat part 23 ... 3rd flat part 3 ... Seal mat (holding member)
DESCRIPTION OF SYMBOLS 31 ... Joint 4 ... Case 41, 42 ... Case half body 41a, 41b, 42a, 42b ... Flange part 43 ... Annular recessed part 44 ... 2nd flat part 45 ... Half circumference top part 46 ... Matching part 6 ... Segment 7 ... Joining material 8 ... Block (joined segments)
81 ... Corner

Claims (5)

外周を１周して外径方向に突出する環状凸部を有するハニカム担体と、
前記環状凸部を囲繞する保持部材と、
前記ハニカム担体を覆うケースであって、前記環状凸部を受容する外径方向に凹んだ環状凹部を有し、周上２分割可能なケースと、を備え、
前記環状凸部を、前記保持部材を介在させて前記環状凹部に保持するハニカム担体の支持構造であって、
前記ケースを２分割したケース半体を合わせる合わせ部と、前記ケース半体の半周上頂部と、に位置する前記環状凸部と前記環状凹部との間隙を他の部分よりも大きくしたことを特徴とするハニカム担体の支持構造。 A honeycomb carrier having an annular convex portion that goes around the outer circumference and protrudes in the outer diameter direction;
A holding member surrounding the annular convex portion;
A case that covers the honeycomb carrier, and includes a case that has an annular concave portion that is recessed in an outer diameter direction to receive the annular convex portion, and can be divided into two on the circumference.
A support structure for a honeycomb carrier that holds the annular convex portion in the annular concave portion with the holding member interposed therebetween,
The gap between the annular convex part and the annular concave part located at the mating part for joining the case halves obtained by dividing the case into two parts and the upper half of the case half is larger than other parts. A honeycomb carrier supporting structure. 前記ケース半体の半周上頂部に位置する前記環状凸部に、他の部分よりも外径方向の突出量を少なくした第１の平坦部を設けると共に、
当該第１の平坦部が設けられた前記環状凸部を受容する前記環状凹部に、他の部分よりも外径方向の凹み量を少なくした第２の平坦部を設けたことを特徴とする請求項１に記載のハニカム担体の支持構造。 While providing a first flat portion with a smaller amount of protrusion in the outer diameter direction than the other portion on the annular convex portion located at the upper half of the circumference of the case half,
The second flat part having a smaller amount of dent in the outer diameter direction than the other part is provided in the annular concave part for receiving the annular convex part provided with the first flat part. Item 2. A support structure for a honeycomb carrier according to Item 1. 前記合わせ部に位置する前記環状凸部に、他の部分よりも外径方向の突出量を少なくした第３の平坦部を設けたことを特徴とする請求項１又は２に記載のハニカム担体の支持構造。   3. The honeycomb carrier according to claim 1, wherein a third flat part having a smaller amount of protrusion in the outer diameter direction than the other part is provided on the annular convex part positioned in the mating part. Support structure. 前記保持部材は、合口を有し、
前記合口は、前記第１の平坦部と前記第２の平坦部との間に配置されることを特徴とする請求項２に記載のハニカム担体の支持構造。 The holding member has a joint,
The support structure for a honeycomb carrier according to claim 2, wherein the joint is disposed between the first flat portion and the second flat portion. 前記ハニカム担体は、複数のセグメントを接合して構成され、
前記第１の平坦部又は前記第３の平坦部は、接合したセグメントの外壁面を利用して構成されることを特徴とする請求項２〜４のいずれかに記載のハニカム担体の支持構造。 The honeycomb carrier is configured by joining a plurality of segments,
The support structure for a honeycomb carrier according to any one of claims 2 to 4, wherein the first flat portion or the third flat portion is configured using an outer wall surface of a joined segment.
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