WO2013168549A1 - Exhaust gas purification device and method for manufacturing same - Google Patents

Exhaust gas purification device and method for manufacturing same Download PDF

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Publication number
WO2013168549A1
WO2013168549A1 PCT/JP2013/061759 JP2013061759W WO2013168549A1 WO 2013168549 A1 WO2013168549 A1 WO 2013168549A1 JP 2013061759 W JP2013061759 W JP 2013061759W WO 2013168549 A1 WO2013168549 A1 WO 2013168549A1
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WO
WIPO (PCT)
Prior art keywords
case
purification member
purification
mat
exhaust gas
Prior art date
Application number
PCT/JP2013/061759
Other languages
French (fr)
Japanese (ja)
Inventor
益子　一豊
手塚　和志
佐藤　大輔
由章 畠山
Original Assignee
株式会社ユタカ技研
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Application filed by 株式会社ユタカ技研 filed Critical 株式会社ユタカ技研
Priority to JP2014514433A priority Critical patent/JPWO2013168549A1/en
Publication of WO2013168549A1 publication Critical patent/WO2013168549A1/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
    • F01N3/2853—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
    • F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
    • F01N3/021—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters
    • F01N3/022—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters characterised by specially adapted filtering structure, e.g. honeycomb, mesh or fibrous
    • F01N3/0222—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters characterised by specially adapted filtering structure, e.g. honeycomb, mesh or fibrous the structure being monolithic, e.g. honeycombs
    • 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
    • F01N2330/00—Structure of catalyst support or particle filter
    • F01N2330/30—Honeycomb supports characterised by their structural details
    • F01N2330/32—Honeycomb supports characterised by their structural details characterised by the shape, form or number of corrugations of plates, sheets or foils
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/12—Improving ICE efficiencies

Definitions

  • the present invention relates to an improvement of an exhaust gas purification device for purifying exhaust gas generated in an internal combustion engine.
  • FIG. 13 shows the exhaust gas purifying apparatus disclosed in Patent Document 1.
  • the exhaust gas purifying apparatus 200 has a purifying member 201 that purifies the exhaust gas, and an outer skin member 202 that is provided along the outer periphery of the purifying member 201. And a mat 203 provided along the outer periphery of the outer skin member 202 for holding the purification member 201 via the outer skin member 202, and a case member 204 provided so as to cover the mat 203.
  • the outer skin member 202 is provided with a first taper portion 205 and a second taper portion 206.
  • the outer skin member 202 is wound around a mat 203.
  • the purification member 201 is prevented from moving upstream (upward in the figure) by the frictional force between the first taper portion 205 and the mat 203 with reference to the flow direction of the exhaust gas.
  • the purification member 201 is prevented from moving downstream due to the frictional force between the second taper portion 206 and the mat 203.
  • the case member 204 includes a first case 211 that houses the upstream side of the purification member 201, a second case 212 that is joined to the downstream side of the first case 211 and houses the downstream side, and a first case 211.
  • An upstream cone member 213 provided on the upstream side of the second case 212 and a downstream cone member 214 provided on the downstream side of the second case 212.
  • the first case 211 is attached by being pushed in from the upstream side of the purification member 201 around which the mat 203 is wound.
  • the second case is attached by being pushed in from the downstream side of the purification member 201 around which the mat 203 is wound. That is, the purification member 201 is housed in the case member 204 by being pushed into the first and second cases 211 and 212 from above and below.
  • the following problems may occur when the first and second cases 211 and 212 are pushed in. That is, the mat 203 may be sandwiched between the first case 211 and the second case 212, as shown in FIG. When the sandwiching portion 216 is generated, a gap is generated between the first and second cases 211 and 212, and an error may occur in the dimensions of the exhaust gas purification device.
  • An object of the present invention is to provide an exhaust gas purifying device capable of preventing matting.
  • an exhaust gas purification apparatus comprising a purification member that purifies exhaust gas, a mat wound around the purification member, and a cylindrical case that houses the mat and the purification member, an inner peripheral surface of the case
  • the exhaust gas purification apparatus from which the distance with the outer peripheral surface of a purification
  • a step of preparing a cylindrical case, a purification member having an outer peripheral surface whose distance from the inner peripheral surface of the case varies depending on a part, and a mat having elastic deformation performance, and a purification member There is provided a method for manufacturing an exhaust gas purifying apparatus, comprising: a step of winding a mat on a mat; and a step of storing a purification member wound with a mat in a case.
  • the distance from the purification member to the case varies depending on the part of the purification member. That is, there are a part where the distance from the purification member to the case is short and a part where the distance from the purification member to the case is long. A portion where the distance from the purification member to the case is short has a narrow space between the purification member and the case, and a portion where the distance from the purification member to the case is long has a large space between the purification member and the case.
  • the mat wound around the purification member is strongly compressed in a narrow space between the purification member and the case. By being strongly compressed, the mat holds the purification member with a high holding force and prevents the purification member from moving within the case.
  • the wide space between the purification member and the case becomes a relief portion of the mat that is compressed in a portion where the space is narrow. Since the mat relief portion is formed, the mat is within a predetermined range. By placing the mat within a predetermined range, the mat can be prevented from being caught by the case.
  • the purification member is housed in the case so that the distance from the purification member to the case varies depending on the site of the purification member in the circumferential direction of the purification member. .
  • the distance from the purification member to the case differs depending on the part of the purification member. That is, there are a part where the distance from the purification member to the case is short and a part where the distance from the purification member to the case is long.
  • a portion where the distance from the purification member to the case is short has a narrow space between the purification member and the case, and a portion where the distance from the purification member to the case is long has a large space between the purification member and the case.
  • the mat wound around the purification member is strongly compressed in a narrow space between the purification member and the case. By being strongly compressed, the mat holds the purification member with a high holding force and prevents the purification member from moving within the case.
  • the wide space between the purification member and the case becomes a relief portion of the mat that is compressed in a portion where the space is narrow. Since the mat relief portion is formed, the mat is within a predetermined range. By placing the mat within a predetermined range, the mat can be prevented from being caught by the case.
  • FIG. 1 It is sectional drawing of the exhaust gas purification apparatus manufactured by the manufacturing method of the exhaust gas purification apparatus by Example 1 of this invention. It is a front view of the purification
  • FIG. 2 is an exploded view of the exhaust gas purification device shown in FIG. 1.
  • FIG. 6 is a sectional view taken along line 6-6 of FIG. It is a figure explaining the effect
  • the exhaust gas purification apparatus 10 includes a purification member 20 for purifying exhaust gas by flowing exhaust gas therein, a mat 30 wound around the purification member 20, and an outer periphery of the mat 30. And a case 40 that houses the purification member 20.
  • the purification member 20 used in the exhaust gas purification apparatus 10 will be described in detail with reference to FIG.
  • FIG. 2 shows the state in which the purification member 20 is viewed from the axis O direction.
  • a ceramic diesel particulate filter Diesel Particulate Filter
  • the purification member 20 includes a general part 21 and a cylindrical part 22 formed into a cylindrical shape by cutting the general part 21.
  • the central axis of the cylindrical portion 22 coincides with the central axis of the general portion 21. These central axes are collectively referred to as an axis O of the purification member 20.
  • the outer periphery of the general portion 21 is composed of a flat surface 24 and an arc-shaped arc surface 25 that are continuous.
  • the four flat surfaces 24 have the same shape, and are formed while being shifted in phase by 90 ° about the axis O of the purification member 20.
  • the opposing flat surfaces 24 are formed in parallel with each other and extend perpendicular to the adjacent flat surfaces 24.
  • the circular arc surface 25 is also formed at four locations, and draws an arc centered on the axis O, and each has the same shape.
  • the arcuate surface 25 is formed at four locations while shifting the phase by 90 ° about the axis O so as to connect the adjacent flat surfaces 24.
  • the purification member 20 can be applied to a catalyzed soot filter, a diesel engine catalyst carrier, and a gasoline engine catalyst carrier in addition to a diesel particulate filter. That is, the purification member is not limited to these as long as it is used for the purpose of purifying exhaust gas generated in the internal combustion engine. A method of forming the purification member 20 will be described in detail with reference to FIG.
  • a rectangular parallelepiped block-shaped purification member 20a is prepared.
  • This block-shaped purification member 20a is formed by combining a plurality of rod-shaped purification members 27 into a block shape.
  • Each of the rod-shaped purification members 27 has a square shape when viewed from the front.
  • a block-shaped purification member 20a having a substantially square shape in front view is formed.
  • the outer periphery of the purification member 20a prepared around the axis O is cut into a circular shape with a diameter D.
  • the diameter D is longer than one side of the purification member 20a and shorter than the diagonal line.
  • the corners are cut while leaving the flat surface 24 on the purification member 20a, and the corners are formed in an arc shape.
  • a part of the outer periphery of the purification member 20a is cut into an arc shape to form an arc surface (FIG. 3B, reference numeral 25) while leaving the flat surface 24.
  • the purification member 20b having the arcuate surface 25 is formed.
  • the both ends of the purifying member 20b are removed while leaving the center in the axial direction.
  • the purification member 20 has a convex shape composed of four flat surfaces 24 and four arcuate surfaces 25.
  • symbol 30) wound around the outer periphery of such a purification member 20 is demonstrated in detail in FIG.
  • the mat 30 can be a mat containing alumina fibers.
  • the mat 30 can be wound around the purification member by a mat winding device in addition to manual winding by an operator.
  • a concave portion 31 having a length L1 is formed at one end of the mat 30 and the other end having a length L2 so that the mat 30 can be fitted when wound on the purification member (FIG. 1, reference numeral 20).
  • a convex portion 32 is formed.
  • the mat 30 is formed with a plurality of through holes 33. These through holes 33 have the effect of improving the adhesion between the purification member and the mat 30 and preventing the mat 30 from being caught by the case (FIG. 1, reference numeral 40).
  • the convex shape portion 32 is configured to be able to be fitted into the concave shape portion 31.
  • the tip 32 a of the convex portion 32 does not contact the bottom 31 a of the concave portion 31. That is, the length from the front end portion 32 a of the convex shape portion 32 to the bottom portion 31 a of the concave shape portion 31 is shorter than the length of the outer periphery of the purification member 20.
  • the length from the distal end portion 32 a of the convex shaped portion 32 to the distal end portion 31 b of the concave shaped portion 31 is longer than the outer peripheral length of the purification member 20.
  • the portion where the through hole 33 is formed is arranged so as to coincide with the arc surface of the purification member. Further, by rolling the mat 30 while pulling, the mat 30 is stretched, and the mat 30 can be brought into close contact with the purification member. Furthermore, by extending the mat 30, it is possible to absorb the difference in circumference between the maximum diameter portion and the minimum diameter portion.
  • the mat 30 may be any mat including metal fibers other than alumina fibers and ceramic fibers, paper mats, mats containing vermiculite, needles, and glass fibers.
  • the purification member around which the mat 30 is wound is housed in a case (FIG. 1, reference numeral 40). This will be described in detail with reference to FIG.
  • the case 40 has a substantially semicircular shape with respect to the cross section in the direction of the axis O and covers the lower portion of the purification member 20, and a substantially semicircular shape and purification.
  • the second case half 60 covers the upper part of the member 20.
  • the first and second case halves 50 and 60 are members that are joined to each other and each cover substantially half of the purification member 20 in the circumferential direction. That is, the case 40 has a cylindrical shape.
  • the first case half 50 is raised from a flat bottom 51, circular diameter parts 52, 52 extending from both ends of the bottom 51 in a circular arc shape and constituting main parts, and these circular diameter parts 52, 52, respectively.
  • Raised portions 53, 53, tapered portions 54, 54 extending obliquely from the raised portions 53, 53, and flange portions 55, 55 extending from the tips of the tapered portions 54, 54.
  • flange portions 55 and 55 are formed in the axial direction of the purification member 20.
  • the flat bottom portion 61, circular diameter portions 62 and 62 constituting main parts extending from both ends of the bottom portion 61, respectively, and rising portions raised from the circular diameter portions 62 and 62, respectively.
  • 63, 63, tapered portions 64, 64 extending obliquely from these rising portions 63, 63, and flange portions 65, 65 extending from the tips of these tapered portions 64, 64.
  • the flange portions 65, 65 are formed over the axial direction of the purification member 20.
  • the purification member 20 around which the mat 30 is wound is pushed toward the first case half 50. In the state before the mat 30 is pushed in, the mat 30 is kept constant throughout.
  • the second case half 60 is pushed toward the purification member 20.
  • the flange portions 55 and 65 are combined. That is, the purification member 20 is accommodated by pushing in the second case half 60.
  • the flange portions 55 and 65 are joined. This will be described in detail with reference to FIG.
  • the exhaust gas purification device 10 is completed by welding the flange portions 55 and 65. Since the distance from the circular arc surface 25 of the purification member 20 to the case 40 and the distance from the flat surface 24 to the case 40 are different, the amount of compression of the mat 30 wound around the outer circumference varies depending on the site of the purification member 20. This will be described in detail with reference to FIG.
  • the manufacturing method according to the present invention includes a step of forming the arc surface 25 while leaving the flat surface 24 of the purification member 20 (see FIG. 3B), and a step of storing the purification member 20 in a case 40 having a substantially circular cross section ( 5).
  • a step of forming the arc surface 25 while leaving the flat surface 24 of the purification member 20 see FIG. 3B
  • an arc surface 25 and a flat surface 24 are formed on the outer periphery of the purification member 20, and the arc surface 25 and the flat surface 24 have a substantially circular cross section.
  • Surrounded by the case 40 (cylindrical case 40).
  • the distance W1 from the circular arc surface 25 to the inner peripheral surface of the case 40 is shorter than the distance W2 from the flat surface 24 to the inner peripheral surface of the case 40. That is, the space between the arc surface 25 and the case 40 is small, and the space between the flat surface 24 and the case 40 is formed large.
  • the mat 30 wound around the purification member 20 is strongly compressed in a narrow space between the arcuate surface 25 and the case 40.
  • the mat 30 holds the purification member 20 with a high holding force and prevents the purification member 20 from moving in the case 40.
  • the wide space between the flat surface 24 and the case 40 becomes a relief portion of the mat 30 that is compressed in a portion where the space is narrow. Since the escape portion of the mat 30 is formed, the mat 30 falls within a predetermined range. By holding the mat 30 within a predetermined range, the mat 30 can be prevented from being caught by the case 40.
  • the arc surface 25 is formed at a position overlapping the case 40 in a state in which the exhaust gas purification device 10 is sectioned along the axis O of the purification member 20 (see particularly FIG. 1).
  • the case 40 prevents the movement of the purification member 20 because the case 40 is disposed in the traveling direction.
  • flange portions 55 and 65 are further formed at portions corresponding to the flat surface 24 of the purification member 20. That is, the flange portions 55 and 65 are formed in a wide portion where the distance from the purification member 20 is long and the mat 30 can escape.
  • the escape portion remains until the end of the pushing operation, so that the purification member 20 can be pushed into the first case half 50 easily.
  • the second case half 60 can be easily pushed into the purification member 20. That is, the assembly work of the exhaust gas purification device 10 is facilitated.
  • the tapered portions 54 and 64 are formed in the first and second case halves 50 and 60, a gap 41 is generated between the first and second case halves 50 and 60.
  • the presence of the gap 41 can further suppress the mat 30 from being sandwiched by the case 40.
  • the circular diameter portion 62 to the flange portion 65 can be formed into a so-called composite r shape in which the radius of curvature changes stepwise.
  • the exhaust gas purification device 10 has a further function. This will be described in detail with reference to FIG.
  • the width W10 of the convex portion 332 of the mat 330 may be equal to or smaller than the width W11 of the general portion 321 of the purification member 320.
  • FIG. 8B which is a cross-sectional view taken along the line bb in FIG. 8A
  • a step of the general portion 321 is provided between the convex portion 332 and the concave portion 331 of the mat 330. Gaps 335 and 335 are generated. Since the gaps 335 and 335 are generated, the exhaust gas that has not passed through the purification member 320 leaks.
  • the exhaust gas purifying apparatus 10 has the width W3 of the convex portion 32 of the mat 30 larger than the width W4 of the general portion 21 of the purification member 20. Largely formed.
  • FIG. 8D which is a sectional view taken along the line dd of FIG. 8C
  • the convex portion 32 and the concave shape of the mat 30 are made longer than the width of the general portion 21.
  • the part 31 is in close contact. By closely contacting, the exhaust gas that has not passed through the purification member 20 is prevented from leaking downstream.
  • FIG. 9 shows an example of changing the mat.
  • FIG. 9 is shown corresponding to FIG. A cut 73 can be made in the mat 70.
  • the purification is performed without weakening the tightening force of the mat 70 to the purification member (FIG. 1, reference numeral 20) compared to the case where the through hole (FIG. 4, reference numeral 33) is formed.
  • the mat 70 can be closely attached to the member.
  • the cut 73 can be formed together with the through hole, and the direction of the cut 73 and the size of the through hole can be selected as appropriate.
  • FIG. 10 shows a cross-sectional configuration in the axial direction of the exhaust gas purifying apparatus according to the second embodiment.
  • FIG. 10 is shown corresponding to FIG.
  • the purification member 90 used in the exhaust gas purification device 80 is a purification whose diameter continuously spreads from one end to the other end in the axial direction with reference to the axis O of the purification member 90. It has a member-side first taper portion 98 and a purification member-side second taper portion 99 whose diameter continuously increases from the other end to the center in the axial direction toward one end, and has a substantially barrel shape.
  • the case 100 in which the purification member 90 is accommodated includes a first case half 120 and a second case half 130.
  • the first case half body 120 includes a first case side first taper portion 128 that continuously moves away from the purification member side first taper portion 98 (the outer peripheral surface of the purification member) from one end to the other end in the axial direction.
  • the first case side second taper portion 129 continuously moves away from the purification member side second taper portion 99 (the outer peripheral surface of the purification member) from the other end toward the one end in the axial direction.
  • the second case half 130 continuously away from the purification member side first taper portion 98 from one end to the other end in the axial direction, and the other end from one end to the center in the axial direction.
  • the second case-side second taper portion 139 continuously moves away from the purification member-side second taper portion 99.
  • the distance between the outer peripheral surface of the purification member 90 and the inner peripheral surface of the case 100 can be increased at the center in the axial direction (see the region sandwiched between two-dot chain lines). That is, this region serves as a relief portion of the mat 30 and suppresses the mat 30 from being sandwiched between the cases 100.
  • the purification member 90 has a substantially barrel shape in which the diameter becomes the largest at the position in the approximate center in the axial direction.
  • FIG. 11 shows an axial sectional configuration of the exhaust gas purifying apparatus according to the third embodiment.
  • FIG. 11 is shown corresponding to FIG.
  • a track-shaped purification member 150 is accommodated in a substantially oval-shaped case 160.
  • the purification member 150 has a flat surface 154 and a circular arc surface 155. Opposing flat surfaces 154 and 154 are formed in parallel, and two semicircular arc surfaces 155 and 155 are formed so as to connect both ends of these flat surfaces 154 and 154, respectively.
  • the case 160 is configured to overlap the first case half 170 and the second case half 180.
  • the first case half 170 is different from the first curved surface 171 formed concentrically with the arc surface 155 of the purification member 150 and the first curved surface 171 formed integrally from the end of the first curved surface 171. It consists of second curved surfaces 172 and 172 having a radius of curvature.
  • the second case half 180 includes a first curved surface 181 and second curved surfaces 182 and 182.
  • the first curved face 171 of the first case half 170 and the first curved face 181 of the second case half 180 have the same shape
  • the second curved face 172 of the first case half 170 and the second case half 180 are
  • the second curved surface 182 has the same shape.
  • the case 160 is entirely constituted by a curved surface.
  • the flange portion 175 extends from the end of the second curved surface 172 of the first case half 170 via the composite r-shaped portion 174.
  • the compound r shape refers to a shape in which the radius of curvature gradually changes from the second curved surfaces 172, 182 toward the flange portions 175, 185.
  • a gap 161 is formed between the composite r-shaped portions 174 and 184.
  • the inner peripheral surface of the case 160 is formed so as to maintain a constant distance substantially parallel to the circular arc surface 155, and is formed so that the distance continuously changes with respect to the flat surface 154.
  • the distance from the case 160 to the flat surface 154 is longer than the distance from the case 160 to the circular arc surface 155.
  • the space between the flat surface 154 of the purification member 150 (a part of the outer peripheral surface of the purification member) and the inner peripheral surface of the case 160 is between the arc surface 155 (the other part of the outer peripheral surface of the purification member) and the case 160. Bigger than the space. Also in the exhaust gas purifying apparatus 140 configured as described above, the predetermined effect of the present invention can be obtained.
  • the substantially elliptical purification member may be housed in a land track-shaped case. . That is, as long as the distance between the outer peripheral surface of the purification member and the inner peripheral surface of the case in the circumferential direction varies depending on the region, purification members and cases having other shapes can be employed. Specifically, it may include an elliptical shape, a land track shape, a geometric ellipse, or an approximately elliptical shape of a composite r, in which the vertical and horizontal diameters are not constant. Thereby, the freedom degree of a vehicle-mounted layout increases.
  • FIG. 12 shows a sectional configuration in the axial direction of the exhaust gas purifying apparatus according to the fourth embodiment.
  • FIG. 12 is shown corresponding to FIG. The position of the flange portion was changed with respect to the exhaust gas purifying apparatus shown in FIG.
  • the land track-shaped purification member 150 is housed in a substantially elliptical case 160A.
  • the case 160A is configured to overlap the first case half 170A and the second case half 180A.
  • the first case half 170A has a first curved surface 171A having a predetermined radius of curvature, and a second curved surface formed integrally with the arcuate surface 155 from the end of the first curved surface 171A. 172A.
  • the second case half 180A includes a first curved surface 181A and a second curved surface 182A.
  • the first curved face 171A of the first case half 170A and the first curved face 181A of the second case half 180A have the same shape, and the second curved face 172A of the first case half 170A and the second case half 180A are the same.
  • the second curved surface 182A has the same shape.
  • the case 160A is entirely composed of a curved surface.
  • the flange portion 175A extends from the end of the second curved surface 172A of the first case half 170A via the composite r-shaped portion 174A.
  • a gap 161A is formed between the composite r-shaped portions 174A and 184A.
  • the inner peripheral surface of the case 160A is formed so as to maintain a constant distance substantially parallel to the circular arc surface 155, and is formed so that the distance continuously changes with respect to the flat surface 154.
  • the distance from the case 160A to the flat surface 154 is longer than the distance from the case 160A to the circular arc surface 155.
  • the space between the flat surface 154 of the purification member 150 (a part of the outer peripheral surface of the purification member) and the inner peripheral surface of the case 160A is an arc surface 155 (the other part of the outer peripheral surface of the purification member) and the inner periphery of the case 160A. Larger than the space between the faces. Also in the exhaust gas purifying apparatus 140A configured as described above, the predetermined effect of the present invention can be obtained.
  • the exhaust gas purification device manufactured by the manufacturing method according to the present invention can be mounted not only on passenger cars but also on vehicles such as buses and trucks, ships, etc., and can be mounted not only on vehicles but also on arbitrary devices. it can.
  • the case used for exhaust gas purification apparatus used the 1st and 2nd case half which covers the half of the circumferential direction of a purification member, respectively, the 1st and 2nd case which covers the half of the axial direction of a purification member, respectively Half can also be used.
  • the method for manufacturing an exhaust gas purifying apparatus according to the present invention is suitable for manufacturing an exhaust gas purifying apparatus used for a diesel vehicle.

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

Abstract

An exhaust gas purification device (10, 80, 140, 140A) comprising a purification member (20, 90, 150) that purifies exhaust gas, a mat (30, 70) wound on this purification member (20, 90, 150), and a cylindrical case (40, 100, 160, 160A) that houses this mat (30, 70) and the purification member (20, 90, 150). The distance between the inner circumferential surface of the case (40, 100, 160, 160A) and the outer circumferential surface of the purification member (20, 90, 150) differs according to the location on the purification member (20, 90, 150).

Description

排ガス浄化装置及び同製造方法Exhaust gas purification device and manufacturing method thereof
　本発明は、内燃機関において発生した排ガスを浄化する、排ガス浄化装置の改良に関する。 The present invention relates to an improvement of an exhaust gas purification device for purifying exhaust gas generated in an internal combustion engine.
　内燃機関において発生した排ガスを浄化するために、多くの車両に排ガス浄化装置が搭載されている。図１３は、特許文献１に開示された排ガス浄化装置を示している。 In order to purify exhaust gas generated in an internal combustion engine, many vehicles are equipped with an exhaust gas purification device. FIG. 13 shows the exhaust gas purifying apparatus disclosed in Patent Document 1.
　図１３（ａ）に示されるように、排ガス浄化装置２００は、内部に排気ガスが流され、この排気ガスを浄化する浄化部材２０１と、この浄化部材２０１の外周に沿って設けられる外皮部材２０２と、この外皮部材２０２の外周に沿って設けられ外皮部材２０２を介して浄化部材２０１を保持するマット２０３と、このマット２０３を覆うように設けられるケース部材２０４とからなる。 As shown in FIG. 13 (a), the exhaust gas purifying apparatus 200 has a purifying member 201 that purifies the exhaust gas, and an outer skin member 202 that is provided along the outer periphery of the purifying member 201. And a mat 203 provided along the outer periphery of the outer skin member 202 for holding the purification member 201 via the outer skin member 202, and a case member 204 provided so as to cover the mat 203.
　外皮部材２０２には、第１テーパ部２０５と、第２テーパ部２０６とが設けられている。この外皮部材２０２は、マット２０３によって巻かれている。排ガスの流れ方向を基準として、第１テーパ部２０５とマット２０３との摩擦力によって、浄化部材２０１が上流側（図上方）へ移動することを防止する。加えて、第２テーパ部２０６とマット２０３との摩擦力によって、浄化部材２０１が下流側へ移動することを防止する。 The outer skin member 202 is provided with a first taper portion 205 and a second taper portion 206. The outer skin member 202 is wound around a mat 203. The purification member 201 is prevented from moving upstream (upward in the figure) by the frictional force between the first taper portion 205 and the mat 203 with reference to the flow direction of the exhaust gas. In addition, the purification member 201 is prevented from moving downstream due to the frictional force between the second taper portion 206 and the mat 203.
　ケース部材２０４は、浄化部材２０１の上流側を収納する第１のケース２１１と、この第１のケース２１１の下流側に接合され下流側を収納する第２のケース２１２と、第１のケース２１１の上流側に設けられる上流側コーン部材２１３と、第２のケース２１２の下流側に設けられる下流側コーン部材２１４とからなる。 The case member 204 includes a first case 211 that houses the upstream side of the purification member 201, a second case 212 that is joined to the downstream side of the first case 211 and houses the downstream side, and a first case 211. An upstream cone member 213 provided on the upstream side of the second case 212 and a downstream cone member 214 provided on the downstream side of the second case 212.
　第１のケース２１１は、マット２０３が巻かれた浄化部材２０１の上流側から押込まれることにより、取付けられる。第２のケースも同様に、マット２０３が巻かれた浄化部材２０１の下流側から押込まれることにより、取付けられる。即ち、浄化部材２０１は、上下から第１、第２のケース２１１，２１２に押込まれることにより、ケース部材２０４に収納される。 The first case 211 is attached by being pushed in from the upstream side of the purification member 201 around which the mat 203 is wound. Similarly, the second case is attached by being pushed in from the downstream side of the purification member 201 around which the mat 203 is wound. That is, the purification member 201 is housed in the case member 204 by being pushed into the first and second cases 211 and 212 from above and below.
　第１、第２のケース２１１，２１２を押込む際に、以下の問題が生じ得る。即ち、図１３（ａ）のｂ部拡大図である図１３（ｂ）に示されるように、第１のケース２１１と第２のケース２１２とによって、マット２０３が挟込まれることがある。挟込み部２１６が生ずることにより、第１、第２のケース２１１，２１２間に隙間が生じ、排ガス浄化装置の寸法に誤差が生じうる。 The following problems may occur when the first and second cases 211 and 212 are pushed in. That is, the mat 203 may be sandwiched between the first case 211 and the second case 212, as shown in FIG. When the sandwiching portion 216 is generated, a gap is generated between the first and second cases 211 and 212, and an error may occur in the dimensions of the exhaust gas purification device.
特開２００１－１６３１８６号公報JP 2001-163186 A
　本発明は、マットの噛込みを防ぐことのできる排ガス浄化装置の提供を課題とする。 An object of the present invention is to provide an exhaust gas purifying device capable of preventing matting.
　本発明によれば、排ガスを浄化する浄化部材と、この浄化部材に巻かれているマットと、このマット及び浄化部材を収納する筒型のケースとからなる排ガス浄化装置において、ケースの内周面と、浄化部材の外周面との距離が、浄化部材の部位によって異なっている排ガス浄化装置が提供される。 According to the present invention, in an exhaust gas purification apparatus comprising a purification member that purifies exhaust gas, a mat wound around the purification member, and a cylindrical case that houses the mat and the purification member, an inner peripheral surface of the case And the exhaust gas purification apparatus from which the distance with the outer peripheral surface of a purification | cleaning member differs with the site | parts of a purification | cleaning member is provided.
　本発明によれば、筒型のケースと、このケースの内周面からの距離が部位によって異なるような外周面を有する浄化部材と、弾性変形性能を有するマットとを準備する工程と、浄化部材にマットを巻く工程と、マットの巻かれた浄化部材をケースに収納する工程と、からなる排ガス浄化装置の製造方法が提供される。 According to the present invention, a step of preparing a cylindrical case, a purification member having an outer peripheral surface whose distance from the inner peripheral surface of the case varies depending on a part, and a mat having elastic deformation performance, and a purification member There is provided a method for manufacturing an exhaust gas purifying apparatus, comprising: a step of winding a mat on a mat; and a step of storing a purification member wound with a mat in a case.
　本発明による排ガス浄化装置は、浄化部材の部位によって浄化部材からケースまでの距離が異なる。即ち、浄化部材からケースまでの距離が短い部位と、浄化部材からケースまでの距離が長い部位が存する。浄化部材からケースまでの距離が短い部位は、浄化部材とケースとの間のスペースが狭く、浄化部材からケースまでの距離が長い部位は、浄化部材とケースとの間のスペースが広い。浄化部材の周りに巻かれるマットは、浄化部材とケースとの間の狭いスペースにおいて強く圧縮される。強く圧縮されることにより、マットは浄化部材を高い保持力で保持し、浄化部材のケース内での移動を防止する。一方、浄化部材とケースとの間の広いスペースは、スペースが狭い部位において圧縮されるマットの逃げ部になる。マットの逃げ部が形成されていることにより、マットが所定の範囲に収まる。マットを所定の範囲に収めることにより、ケースによるマットの挟込みを抑制することができる。 In the exhaust gas purification apparatus according to the present invention, the distance from the purification member to the case varies depending on the part of the purification member. That is, there are a part where the distance from the purification member to the case is short and a part where the distance from the purification member to the case is long. A portion where the distance from the purification member to the case is short has a narrow space between the purification member and the case, and a portion where the distance from the purification member to the case is long has a large space between the purification member and the case. The mat wound around the purification member is strongly compressed in a narrow space between the purification member and the case. By being strongly compressed, the mat holds the purification member with a high holding force and prevents the purification member from moving within the case. On the other hand, the wide space between the purification member and the case becomes a relief portion of the mat that is compressed in a portion where the space is narrow. Since the mat relief portion is formed, the mat is within a predetermined range. By placing the mat within a predetermined range, the mat can be prevented from being caught by the case.
　本発明による排ガス浄化装置の製造方法によれば、浄化部材の周方向において、浄化部材の部位によって浄化部材からケースまでの距離が異なるように、浄化部材をケースに収納する工程を有している。この製造方法によって製造された排ガス浄化装置は、浄化部材の部位によって浄化部材からケースまでの距離が異なる。即ち、浄化部材からケースまでの距離が短い部位と、浄化部材からケースまでの距離が長い部位が存する。浄化部材からケースまでの距離が短い部位は、浄化部材とケースとの間のスペースが狭く、浄化部材からケースまでの距離が長い部位は、浄化部材とケースとの間のスペースが広い。浄化部材の周りに巻かれるマットは、浄化部材とケースとの間の狭いスペースにおいて強く圧縮される。強く圧縮されることにより、マットは浄化部材を高い保持力で保持し、浄化部材のケース内での移動を防止する。一方、浄化部材とケースとの間の広いスペースは、スペースが狭い部位において圧縮されるマットの逃げ部になる。マットの逃げ部が形成されていることにより、マットが所定の範囲に収まる。マットを所定の範囲に収めることにより、ケースによるマットの挟込みを抑制することができる。 According to the method for manufacturing an exhaust gas purification apparatus of the present invention, the purification member is housed in the case so that the distance from the purification member to the case varies depending on the site of the purification member in the circumferential direction of the purification member. . In the exhaust gas purification apparatus manufactured by this manufacturing method, the distance from the purification member to the case differs depending on the part of the purification member. That is, there are a part where the distance from the purification member to the case is short and a part where the distance from the purification member to the case is long. A portion where the distance from the purification member to the case is short has a narrow space between the purification member and the case, and a portion where the distance from the purification member to the case is long has a large space between the purification member and the case. The mat wound around the purification member is strongly compressed in a narrow space between the purification member and the case. By being strongly compressed, the mat holds the purification member with a high holding force and prevents the purification member from moving within the case. On the other hand, the wide space between the purification member and the case becomes a relief portion of the mat that is compressed in a portion where the space is narrow. Since the mat relief portion is formed, the mat is within a predetermined range. By placing the mat within a predetermined range, the mat can be prevented from being caught by the case.
本発明の実施例１による排ガス浄化装置の製造方法によって製造された排ガス浄化装置の断面図である。It is sectional drawing of the exhaust gas purification apparatus manufactured by the manufacturing method of the exhaust gas purification apparatus by Example 1 of this invention. 図１に示された排ガス浄化装置に用いられている浄化部材の正面図である。It is a front view of the purification | cleaning member used for the exhaust gas purification apparatus shown by FIG. 図２に示された浄化部材の成形方法を説明する図である。It is a figure explaining the shaping | molding method of the purification | cleaning member shown by FIG. 図１に示された排ガス浄化装置に用いられているマットの正面図である。It is a front view of the mat | matte used for the exhaust gas purification apparatus shown by FIG. 図１に示された排ガス浄化装置の分解図である。FIG. 2 is an exploded view of the exhaust gas purification device shown in FIG. 1. 図１の６－６線断面図である。FIG. 6 is a sectional view taken along line 6-6 of FIG. 図６に示された排ガス浄化装置の作用を説明する図である。It is a figure explaining the effect | action of the exhaust gas purification apparatus shown by FIG. 図４に示されたマットの作用を説明する図である。It is a figure explaining the effect | action of the mat | matte shown by FIG. 図４に示されたマットの変更例を説明する図である。It is a figure explaining the example of a change of the mat | matte shown by FIG. 本発明の実施例２による排ガス浄化装置の製造方法によって製造された排ガス浄化装置の断面図である。It is sectional drawing of the exhaust gas purification apparatus manufactured by the manufacturing method of the exhaust gas purification apparatus by Example 2 of this invention. 本発明の実施例３による排ガス浄化装置の製造方法によって製造された排ガス浄化装置の断面図である。It is sectional drawing of the exhaust gas purification apparatus manufactured by the manufacturing method of the exhaust gas purification apparatus by Example 3 of this invention. 本発明の実施例４による排ガス浄化装置の製造方法によって製造された排ガス浄化装置の断面図である。It is sectional drawing of the exhaust gas purification apparatus manufactured by the manufacturing method of the exhaust gas purification apparatus by Example 4 of this invention. 従来の技術の基本構成を説明する図である。It is a figure explaining the basic composition of the conventional technology.
　以下、本発明の好ましい実施例について、添付した図面に基づいて詳細に説明する。 Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.
　図１に示されるように、排ガス浄化装置１０は、内部に排気ガスが流され排ガスを浄化するための浄化部材２０と、この浄化部材２０に巻かれているマット３０と、このマット３０の外周に設けられ浄化部材２０を収納しているケース４０とからなる。このような排ガス浄化装置１０に用いられている浄化部材２０について、図２において詳細に説明する。 As shown in FIG. 1, the exhaust gas purification apparatus 10 includes a purification member 20 for purifying exhaust gas by flowing exhaust gas therein, a mat 30 wound around the purification member 20, and an outer periphery of the mat 30. And a case 40 that houses the purification member 20. The purification member 20 used in the exhaust gas purification apparatus 10 will be described in detail with reference to FIG.
　図２は、浄化部材２０が軸Ｏ方向から見た状態によって示されている。図２に示されるように、浄化部材２０には、セラミック製のディーゼルパーティキュレートフィルタ（Diesel　Particulate　Filter）を用いることができる。浄化部材２０は、一般部２１と、この一般部２１を削ることにより円柱状に形成される円柱部２２とからなる。円柱部２２の中心軸は、一般部２１の中心軸に一致している。これらの中心軸をまとめて浄化部材２０の軸線Ｏという。 FIG. 2 shows the state in which the purification member 20 is viewed from the axis O direction. As shown in FIG. 2, a ceramic diesel particulate filter (Diesel Particulate Filter) can be used for the purification member 20. The purification member 20 includes a general part 21 and a cylindrical part 22 formed into a cylindrical shape by cutting the general part 21. The central axis of the cylindrical portion 22 coincides with the central axis of the general portion 21. These central axes are collectively referred to as an axis O of the purification member 20.
　一般部２１の外周は、平坦面２４と、円弧形状の円弧面２５とが連続してなる。４つの平坦面２４は、それぞれ同形状を呈し、浄化部材２０の軸線Ｏを中心に９０°ずつ位相をずらしながら形成されている。向かい合う平坦面２４は、それぞれ平行に形成されていると共に、隣り合う平坦面２４に対して垂直に延びている。円弧面２５も４箇所に形成され、軸線Ｏを中心とした円弧を描いていると共に、それぞれが同形状を呈する。円弧面２５は、隣り合う平坦面２４を繋ぐようにして、軸線Ｏを中心に９０°ずつ位相をずらしながら４箇所に形成されている。 The outer periphery of the general portion 21 is composed of a flat surface 24 and an arc-shaped arc surface 25 that are continuous. The four flat surfaces 24 have the same shape, and are formed while being shifted in phase by 90 ° about the axis O of the purification member 20. The opposing flat surfaces 24 are formed in parallel with each other and extend perpendicular to the adjacent flat surfaces 24. The circular arc surface 25 is also formed at four locations, and draws an arc centered on the axis O, and each has the same shape. The arcuate surface 25 is formed at four locations while shifting the phase by 90 ° about the axis O so as to connect the adjacent flat surfaces 24.
　なお、浄化部材２０には、ディーゼルパーティキュレートフィルタの他、キャタライズドスートフィルター（Catalyzed　Soot　Filter）、ディーゼルエンジン用触媒担体、ガソリンエンジン用触媒担体にも適用可能である。即ち、内燃機関において発生する排ガスを浄化する目的で用いられるものであれば、浄化部材は、これらのものに限られない。浄化部材２０の成形方法を図３において詳細に説明する。 The purification member 20 can be applied to a catalyzed soot filter, a diesel engine catalyst carrier, and a gasoline engine catalyst carrier in addition to a diesel particulate filter. That is, the purification member is not limited to these as long as it is used for the purpose of purifying exhaust gas generated in the internal combustion engine. A method of forming the purification member 20 will be described in detail with reference to FIG.
　図３（ａ）に示されるように、まず、直方体ブロック状の浄化部材２０ａを準備する。このブロック状の浄化部材２０ａは、複数の棒状の浄化部材２７を合わせてブロック状に形成されたものである。棒状の浄化部材２７は、それぞれ正面視において正方形を呈する。このような棒状の浄化部材２７を縦及び横に同数合わせることにより、正面視略正方形のブロック状の浄化部材２０ａが形成される。 As shown in FIG. 3A, first, a rectangular parallelepiped block-shaped purification member 20a is prepared. This block-shaped purification member 20a is formed by combining a plurality of rod-shaped purification members 27 into a block shape. Each of the rod-shaped purification members 27 has a square shape when viewed from the front. By aligning the same number of such rod-shaped purification members 27 vertically and horizontally, a block-shaped purification member 20a having a substantially square shape in front view is formed.
　軸線Ｏを中心として準備した浄化部材２０ａの外周を直径Ｄの円形状に削る。直径Ｄは、浄化部材２０ａの１辺よりも長く、対角線よりも短い。これにより、浄化部材２０ａに平坦面２４を残しつつ角を削り、角を円弧状に形成する。即ち、浄化部材２０ａの外周の一部を円弧状に削ることにより、平坦面２４を残しつつ円弧面（図３（ｂ）、符号２５）を形成する。 The outer periphery of the purification member 20a prepared around the axis O is cut into a circular shape with a diameter D. The diameter D is longer than one side of the purification member 20a and shorter than the diagonal line. Thus, the corners are cut while leaving the flat surface 24 on the purification member 20a, and the corners are formed in an arc shape. In other words, a part of the outer periphery of the purification member 20a is cut into an arc shape to form an arc surface (FIG. 3B, reference numeral 25) while leaving the flat surface 24.
　削ることにより、図３（ｂ）及び図３（ｃ）に示されるように、円弧面２５を有する浄化部材２０ｂが形成される。このような浄化部材２０ｂの軸方向の中心を残し、両端を削る。 By sharpening, as shown in FIG. 3B and FIG. 3C, the purification member 20b having the arcuate surface 25 is formed. The both ends of the purifying member 20b are removed while leaving the center in the axial direction.
　図３（ｄ）に示されるように、両端に円柱部２２，２２が形成される。これにより、浄化部材２０が完成する。浄化部材２０は、４箇所の平坦面２４と、４箇所の円弧面２５とからなる凸部形状を有する。このような浄化部材２０の外周に巻かれるマット（図１、符号３０）を図４において詳細に説明する。 As shown in FIG. 3D, cylindrical portions 22 and 22 are formed at both ends. Thereby, the purification member 20 is completed. The purification member 20 has a convex shape composed of four flat surfaces 24 and four arcuate surfaces 25. The mat (FIG. 1, code | symbol 30) wound around the outer periphery of such a purification member 20 is demonstrated in detail in FIG.
　図４に示されるように、マット３０には、アルミナ繊維を含有したマットを用いることができる。マット３０は、作業員による手巻きの他、マット巻き装置によって浄化部材に巻くことができる。浄化部材（図１、符号２０）に巻いた際に嵌合させることができるよう、マット３０の一端には、長さＬ１の凹形状部３１が形成され、他端には、長さＬ２の凸形状部３２が形成されている。また、マット３０には、複数の貫通穴３３が形成されている。これらの貫通穴３３は、浄化部材とマット３０との密着性を向上させると共に、ケース（図１、符号４０）によるマット３０の挟込みを防止する効果をもつ。 As shown in FIG. 4, the mat 30 can be a mat containing alumina fibers. The mat 30 can be wound around the purification member by a mat winding device in addition to manual winding by an operator. A concave portion 31 having a length L1 is formed at one end of the mat 30 and the other end having a length L2 so that the mat 30 can be fitted when wound on the purification member (FIG. 1, reference numeral 20). A convex portion 32 is formed. Further, the mat 30 is formed with a plurality of through holes 33. These through holes 33 have the effect of improving the adhesion between the purification member and the mat 30 and preventing the mat 30 from being caught by the case (FIG. 1, reference numeral 40).
　なお、浄化部材の最大径部と最小径部の周長差を考慮してＬ１，Ｌ２を設定することが望ましい。 In addition, it is desirable to set L1 and L2 in consideration of the circumferential length difference between the maximum diameter portion and the minimum diameter portion of the purification member.
　凸形状部３２は、凹形状部３１に嵌合させることのできる構成とされている。嵌合させた際に、凸形状部３２の先端部３２ａは、凹形状部３１の底部３１ａに接触しない。即ち、凸形状部３２の先端部３２ａから凹形状部３１の底部３１ａまでの長さは、浄化部材２０の外周の長さよりも短い。一方、凸形状部３２の先端部３２ａから凹形状部３１の先端部３１ｂまでの長さは、浄化部材２０の外周の長さよりも長い。 The convex shape portion 32 is configured to be able to be fitted into the concave shape portion 31. When fitted, the tip 32 a of the convex portion 32 does not contact the bottom 31 a of the concave portion 31. That is, the length from the front end portion 32 a of the convex shape portion 32 to the bottom portion 31 a of the concave shape portion 31 is shorter than the length of the outer periphery of the purification member 20. On the other hand, the length from the distal end portion 32 a of the convex shaped portion 32 to the distal end portion 31 b of the concave shaped portion 31 is longer than the outer peripheral length of the purification member 20.
　マット３０や浄化部材を製造することにより、不可避的に製品誤差が生ずる。凸形状部３２の先端部３２ａを凹形状部３１の底部３１ａに接触しない構成とすることにより、不可避的に生ずる製品誤差を凹形状部３１によって吸収し、確実にマット３０を浄化部材に巻くことができる。 Product errors are inevitably caused by manufacturing the mat 30 and the purification member. By adopting a configuration in which the tip 32a of the convex portion 32 is not in contact with the bottom 31a of the concave portion 31, inevitable product errors are absorbed by the concave portion 31, and the mat 30 is reliably wound around the purification member. Can do.
　マット３０の巻き付けの際、貫通穴３３の形成されている部位が、浄化部材の円弧面に一致するように配置する。また、マット３０を引張りながら巻くことにより、マット３０が伸び、マット３０を浄化部材により密着させることができる。さらに、マット３０を伸ばすことにより、最大径部と最小径部の周長差を吸収することができる。 When the mat 30 is wound, the portion where the through hole 33 is formed is arranged so as to coincide with the arc surface of the purification member. Further, by rolling the mat 30 while pulling, the mat 30 is stretched, and the mat 30 can be brought into close contact with the purification member. Furthermore, by extending the mat 30, it is possible to absorb the difference in circumference between the maximum diameter portion and the minimum diameter portion.
　なお、マット３０は、アルミナ繊維以外の金属繊維やセラミックス繊維を含有するもの、抄造マット、バーミキュライトを含んだマット、ニードル、グラスファイバー等任意のマットを用いることができる。マット３０の巻かれた浄化部材は、ケース（図１、符号４０）に収納される。図５において詳細に説明する。 The mat 30 may be any mat including metal fibers other than alumina fibers and ceramic fibers, paper mats, mats containing vermiculite, needles, and glass fibers. The purification member around which the mat 30 is wound is housed in a case (FIG. 1, reference numeral 40). This will be described in detail with reference to FIG.
　図５に示されるように、ケース４０は、軸Ｏ方向の断面を基準として、略半円形状を呈し浄化部材２０の下部を覆う第１ケース半体５０と、略半円形状を呈すると共に浄化部材２０の上部を覆う第２ケース半体６０とからなる。第１及び第２ケース半体５０，６０は、互いに接合されると共に、それぞれが浄化部材２０の周方向の略半分を覆う部材である。即ち、ケース４０は、筒型を呈する。 As shown in FIG. 5, the case 40 has a substantially semicircular shape with respect to the cross section in the direction of the axis O and covers the lower portion of the purification member 20, and a substantially semicircular shape and purification. The second case half 60 covers the upper part of the member 20. The first and second case halves 50 and 60 are members that are joined to each other and each cover substantially half of the purification member 20 in the circumferential direction. That is, the case 40 has a cylindrical shape.
　第１ケース半体５０は、平坦な底部５１と、この底部５１の両端からそれぞれ円弧形状に延び主要部を構成する円径部５２，５２と、これらの円径部５２，５２からそれぞれ立ち上げられている立上げ部５３，５３と、これらの立上げ部５３，５３から斜めに延びるテーパ部５４，５４と、これらのテーパ部５４，５４の先端から延びているフランジ部５５，５５とからなる。フランジ部５５，５５は、浄化部材２０の軸方向に渡って形成されている。 The first case half 50 is raised from a flat bottom 51, circular diameter parts 52, 52 extending from both ends of the bottom 51 in a circular arc shape and constituting main parts, and these circular diameter parts 52, 52, respectively. Raised portions 53, 53, tapered portions 54, 54 extending obliquely from the raised portions 53, 53, and flange portions 55, 55 extending from the tips of the tapered portions 54, 54. Become. The flange portions 55 and 55 are formed in the axial direction of the purification member 20.
　第２ケース半体６０も同様である。即ち、平坦な底部６１と、この底部６１の両端からそれぞれ円弧形状に延び主要部を構成する円径部６２，６２と、これらの円径部６２，６２からそれぞれ立ち上げられている立上げ部６３，６３と、これらの立上げ部６３，６３から斜めに延びるテーパ部６４，６４と、これらのテーパ部６４，６４の先端から延びているフランジ部６５，６５とからなる。フランジ部６５，６５は、浄化部材２０の軸方向に渡って形成されている。 The same applies to the second case half 60. That is, the flat bottom portion 61, circular diameter portions 62 and 62 constituting main parts extending from both ends of the bottom portion 61, respectively, and rising portions raised from the circular diameter portions 62 and 62, respectively. 63, 63, tapered portions 64, 64 extending obliquely from these rising portions 63, 63, and flange portions 65, 65 extending from the tips of these tapered portions 64, 64. The flange portions 65, 65 are formed over the axial direction of the purification member 20.
　まず、マット３０を巻かれた浄化部材２０を第１ケース半体５０に向かって押込む。マット３０を押込む前の状態において、マット３０は全体を通して一定の厚さに保たれている。 First, the purification member 20 around which the mat 30 is wound is pushed toward the first case half 50. In the state before the mat 30 is pushed in, the mat 30 is kept constant throughout.
　次に、浄化部材２０に向かって第２ケース半体６０を押込む。第２ケース半体６０を押込むことによって、フランジ部５５，６５が合される。即ち、第２ケース半体６０を押込むことによって、浄化部材２０が収納される。フランジ部５５，６５が合された後、これらのフランジ部５５，６５を溶接する。図６において詳細に説明する。 Next, the second case half 60 is pushed toward the purification member 20. By pressing the second case half 60, the flange portions 55 and 65 are combined. That is, the purification member 20 is accommodated by pushing in the second case half 60. After the flange portions 55 and 65 are joined, the flange portions 55 and 65 are welded. This will be described in detail with reference to FIG.
　図６に示されるように、フランジ部５５，６５を溶接することにより排ガス浄化装置１０が完成する。浄化部材２０の円弧面２５からケース４０までの距離と、平坦面２４からケース４０までの距離とが異なることにより、外周に巻かれるマット３０の圧縮量が浄化部材２０の部位によって異なる。図７において詳細に説明する。 As shown in FIG. 6, the exhaust gas purification device 10 is completed by welding the flange portions 55 and 65. Since the distance from the circular arc surface 25 of the purification member 20 to the case 40 and the distance from the flat surface 24 to the case 40 are different, the amount of compression of the mat 30 wound around the outer circumference varies depending on the site of the purification member 20. This will be described in detail with reference to FIG.
　図７に示されるように、軸線Ｏから浄化部材２０の円弧面２５までの距離Ｒは、軸線Ｏから平坦面２４までの距離Ｌ３に比べ長い。本発明による製造方法は、浄化部材２０の平坦面２４を残しつつ円弧面２５を形成する工程（図３（ｂ）参照）と、浄化部材２０を断面略円形状のケース４０に収納する工程（図５）とを有している。これらの工程を経て製造された排ガス浄化装置１０は、浄化部材２０の外周に円弧面２５と平坦面２４とが形成されると共に、これらの円弧面２５と平坦面２４とが断面略円形状のケース４０（円筒形のケース４０）によって囲われる。ケース４０が断面略円形であるため、円弧面２５からケース４０の内周面までの距離Ｗ１は、平坦面２４からケース４０の内周面までの距離Ｗ２に比べ、短くなる。即ち、円弧面２５とケース４０との間のスペースは小さく、平坦面２４とケース４０との間のスペースは大きく形成される。 As shown in FIG. 7, the distance R from the axis O to the arc surface 25 of the purification member 20 is longer than the distance L3 from the axis O to the flat surface 24. The manufacturing method according to the present invention includes a step of forming the arc surface 25 while leaving the flat surface 24 of the purification member 20 (see FIG. 3B), and a step of storing the purification member 20 in a case 40 having a substantially circular cross section ( 5). In the exhaust gas purification apparatus 10 manufactured through these steps, an arc surface 25 and a flat surface 24 are formed on the outer periphery of the purification member 20, and the arc surface 25 and the flat surface 24 have a substantially circular cross section. Surrounded by the case 40 (cylindrical case 40). Since the case 40 has a substantially circular cross section, the distance W1 from the circular arc surface 25 to the inner peripheral surface of the case 40 is shorter than the distance W2 from the flat surface 24 to the inner peripheral surface of the case 40. That is, the space between the arc surface 25 and the case 40 is small, and the space between the flat surface 24 and the case 40 is formed large.
　図１も参照して、浄化部材２０の周りに巻かれるマット３０は、円弧面２５とケース４０との間の狭いスペースにおいて強く圧縮される。強く圧縮されることにより、マット３０は浄化部材２０を高い保持力で保持し、浄化部材２０のケース４０内での移動を防止する。一方、平坦面２４とケース４０との間の広いスペースは、スペースが狭い部位において圧縮されるマット３０の逃げ部になる。マット３０の逃げ部が形成されていることにより、マット３０が所定の範囲に収まる。マット３０を所定の範囲に収めることにより、ケース４０によるマット３０の挟込みを抑制することができる。 Referring also to FIG. 1, the mat 30 wound around the purification member 20 is strongly compressed in a narrow space between the arcuate surface 25 and the case 40. By being strongly compressed, the mat 30 holds the purification member 20 with a high holding force and prevents the purification member 20 from moving in the case 40. On the other hand, the wide space between the flat surface 24 and the case 40 becomes a relief portion of the mat 30 that is compressed in a portion where the space is narrow. Since the escape portion of the mat 30 is formed, the mat 30 falls within a predetermined range. By holding the mat 30 within a predetermined range, the mat 30 can be prevented from being caught by the case 40.
　加えて、浄化部材２０の軸Ｏに沿って排ガス浄化装置１０を断面した状態（特に図１参照）において、円弧面２５は、ケース４０に重なる位置に形成されている。浄化部材２０が軸方向に移動しようとした場合に、進行方向にケース４０が配置されているため、ケース４０が浄化部材２０の移動を防止する。 In addition, the arc surface 25 is formed at a position overlapping the case 40 in a state in which the exhaust gas purification device 10 is sectioned along the axis O of the purification member 20 (see particularly FIG. 1). When the purification member 20 is about to move in the axial direction, the case 40 prevents the movement of the purification member 20 because the case 40 is disposed in the traveling direction.
　図６に戻り、さらに、浄化部材２０の平坦面２４に対応する部位に、フランジ部５５，６５が形成されている。即ち、浄化部材２０との距離が長く、マット３０が逃げ得る広い部位にフランジ部５５，６５を形成する。浄化部材２０を第１ケース半体５０へ押込む際に、押込み作業の最後まで逃げ部が残っているので、浄化部材２０を第１ケース半体５０へ容易に押込むことができる。また同様の理由により、第２ケース半体６０を浄化部材２０へ容易に押込むことができる。即ち、排ガス浄化装置１０の組立作業が容易になる。 Returning to FIG. 6, flange portions 55 and 65 are further formed at portions corresponding to the flat surface 24 of the purification member 20. That is, the flange portions 55 and 65 are formed in a wide portion where the distance from the purification member 20 is long and the mat 30 can escape. When the purification member 20 is pushed into the first case half 50, the escape portion remains until the end of the pushing operation, so that the purification member 20 can be pushed into the first case half 50 easily. For the same reason, the second case half 60 can be easily pushed into the purification member 20. That is, the assembly work of the exhaust gas purification device 10 is facilitated.
　また、第１及び第２ケース半体５０，６０のそれぞれにテーパ部５４，６４が形成されていることにより、第１及び第２ケース半体５０，６０の間には隙間４１が生じる。この隙間４１があることにより、さらにケース４０によるマット３０の挟込みを抑制することができる。テーパ部５４，６４に代え、円径部６２からフランジ部６５までを、段階的に曲率半径が変化する、いわゆる複合ｒ形状とすることもできる。排ガス浄化装置１０は、さらなる作用を有する。図８において詳細に説明する。 Further, since the tapered portions 54 and 64 are formed in the first and second case halves 50 and 60, a gap 41 is generated between the first and second case halves 50 and 60. The presence of the gap 41 can further suppress the mat 30 from being sandwiched by the case 40. Instead of the taper portions 54 and 64, the circular diameter portion 62 to the flange portion 65 can be formed into a so-called composite r shape in which the radius of curvature changes stepwise. The exhaust gas purification device 10 has a further function. This will be described in detail with reference to FIG.
　図８（ａ）の比較例に示されるように、マット３３０の凸形状部３３２の幅Ｗ１０が、浄化部材３２０の一般部３２１の幅Ｗ１１と同等である場合、又は小さいことがある。 As shown in the comparative example of FIG. 8A, the width W10 of the convex portion 332 of the mat 330 may be equal to or smaller than the width W11 of the general portion 321 of the purification member 320.
　この場合、図８（ａ）のｂ－ｂ線断面図である図８（ｂ）に示されるように、マット３３０の凸形状部３３２と凹形状部３３１との間に一般部３２１の段差によって隙間３３５，３３５が生じる。隙間３３５，３３５が生じていることにより、浄化部材３２０を通過しなかった排気ガスが漏れる。 In this case, as shown in FIG. 8B, which is a cross-sectional view taken along the line bb in FIG. 8A, a step of the general portion 321 is provided between the convex portion 332 and the concave portion 331 of the mat 330. Gaps 335 and 335 are generated. Since the gaps 335 and 335 are generated, the exhaust gas that has not passed through the purification member 320 leaks.
　即ち、図８（ａ）の矢印（１１）～矢印（１３）において示されるように、排ガスの一部は、浄化部材３２０の外周に向かって流れる。浄化部材３２０の外周に向かって流れた排気ガスの一部が、凸形状部３３２と凹形状部３３１との間を通過し、浄化部材３２０を通過することなく、排ガス浄化装置３１０の外部へと流れる。即ち、浄化されていない排ガスが排ガス浄化装置３１０の外部へと流れる。 That is, as shown by arrows (11) to (13) in FIG. 8A, a part of the exhaust gas flows toward the outer periphery of the purification member 320. Part of the exhaust gas flowing toward the outer periphery of the purification member 320 passes between the convex shape portion 332 and the concave shape portion 331, and passes outside the exhaust gas purification device 310 without passing through the purification member 320. Flowing. In other words, the exhaust gas that has not been purified flows to the outside of the exhaust gas purification device 310.
　一方、図８（ｃ）の実施例に示されるように、実施例に係る排ガス浄化装置１０は、マット３０の凸形状部３２の幅Ｗ３が、浄化部材２０の一般部２１の幅Ｗ４よりも大きく形成されている。 On the other hand, as shown in the embodiment of FIG. 8C, the exhaust gas purifying apparatus 10 according to the embodiment has the width W3 of the convex portion 32 of the mat 30 larger than the width W4 of the general portion 21 of the purification member 20. Largely formed.
　この場合、図８（ｃ）のｄ－ｄ線断面図である図８（ｄ）に示されるように、一般部２１の幅よりも長くすることにより、マット３０の凸形状部３２と凹形状部３１とが密着する。密着することにより、浄化部材２０を通過しなかった排気ガスが下流側に漏れることを防止する。 In this case, as shown in FIG. 8D, which is a sectional view taken along the line dd of FIG. 8C, the convex portion 32 and the concave shape of the mat 30 are made longer than the width of the general portion 21. The part 31 is in close contact. By closely contacting, the exhaust gas that has not passed through the purification member 20 is prevented from leaking downstream.
　即ち、図８（ｃ）の矢印（１）において示されるように、排ガスの一部は、浄化部材２０の外周に向かって流れる。浄化部材２０の外周に向かって流れた排気ガスは、マット３０によって下流側へ流れることを防止されている。即ち、浄化されていない排ガスが排ガス浄化装置１０の外部へと流れることを防止することができる。
　マット３０の変更例を図９において説明する。 That is, a part of the exhaust gas flows toward the outer periphery of the purification member 20 as indicated by an arrow (1) in FIG. The exhaust gas flowing toward the outer periphery of the purification member 20 is prevented from flowing downstream by the mat 30. That is, unpurified exhaust gas can be prevented from flowing to the outside of the exhaust gas purification device 10.
A modification example of the mat 30 will be described with reference to FIG.
　図９には、マットの変更例が示されている。図９は、上記図４に対応させて表している。マット７０に切込み７３を入れることもできる。マット７０に切込み７３を形成した場合には、貫通穴（図４、符号３３）を形成した場合に比べ、マット７０の浄化部材（図１、符号２０）への締付け力を弱めることなく、浄化部材へよりマット７０を密着させることができる。 FIG. 9 shows an example of changing the mat. FIG. 9 is shown corresponding to FIG. A cut 73 can be made in the mat 70. When the notch 73 is formed in the mat 70, the purification is performed without weakening the tightening force of the mat 70 to the purification member (FIG. 1, reference numeral 20) compared to the case where the through hole (FIG. 4, reference numeral 33) is formed. The mat 70 can be closely attached to the member.
　なお、切込み７３は、貫通穴と共に形成することもでき、切込み７３の方向や貫通穴の大きさは、適宜選択することができる。 The cut 73 can be formed together with the through hole, and the direction of the cut 73 and the size of the through hole can be selected as appropriate.
　次に、本発明の実施例２を図面に基づいて説明する。図１０には、実施例２の排ガス浄化装置の軸方向の断面構成が示されている。図１０は、上記図１に対応させて表されている。 Next, Example 2 of the present invention will be described with reference to the drawings. FIG. 10 shows a cross-sectional configuration in the axial direction of the exhaust gas purifying apparatus according to the second embodiment. FIG. 10 is shown corresponding to FIG.
　図１０に示されるように、排ガス浄化装置８０に用いられる浄化部材９０は、この浄化部材９０の軸線Ｏを基準として、一端から他端に向かって軸方向の中央まで径が連続的に広がる浄化部材側第１テーパ部９８と、他端から一端に向かって軸方向の中央まで径が連続的に広がる浄化部材側第２テーパ部９９とを有し、略樽型を呈する。 As shown in FIG. 10, the purification member 90 used in the exhaust gas purification device 80 is a purification whose diameter continuously spreads from one end to the other end in the axial direction with reference to the axis O of the purification member 90. It has a member-side first taper portion 98 and a purification member-side second taper portion 99 whose diameter continuously increases from the other end to the center in the axial direction toward one end, and has a substantially barrel shape.
　また、浄化部材９０が収納されるケース１００は、第１ケース半体１２０と第２ケース半体１３０とからなる。 The case 100 in which the purification member 90 is accommodated includes a first case half 120 and a second case half 130.
　第１ケース半体１２０は、一端から他端に向かって軸方向の中央まで連続的に浄化部材側第１テーパ部９８（浄化部材の外周面）から遠ざかる第１ケース側第１テーパ部１２８と、他端から一端に向かって軸方向の中央まで連続的に浄化部材側第２テーパ部９９（浄化部材の外周面）から遠ざかる第１ケース側第２テーパ部１２９とからなる。 The first case half body 120 includes a first case side first taper portion 128 that continuously moves away from the purification member side first taper portion 98 (the outer peripheral surface of the purification member) from one end to the other end in the axial direction. The first case side second taper portion 129 continuously moves away from the purification member side second taper portion 99 (the outer peripheral surface of the purification member) from the other end toward the one end in the axial direction.
　第２ケース半体１３０も同様である。即ち、一端から他端に向かって軸方向の中央まで連続的に浄化部材側第１テーパ部９８から遠ざかる第２ケース側第１テーパ部１３８と、他端から一端に向かって軸方向の中央まで連続的に浄化部材側第２テーパ部９９から遠ざかる第２ケース側第２テーパ部１３９とからなる。 The same applies to the second case half 130. That is, the second case side first taper portion 138 continuously away from the purification member side first taper portion 98 from one end to the other end in the axial direction, and the other end from one end to the center in the axial direction. The second case-side second taper portion 139 continuously moves away from the purification member-side second taper portion 99.
　このように形成することにより、軸方向の中央（二点鎖線によって挟まれた領域参照）において浄化部材９０の外周面とケース１００の内周面との距離を長くすることができる。即ち、この領域がマット３０の逃げ部となり、マット３０がケース１００に挟込まれることを抑制する。 By forming in this way, the distance between the outer peripheral surface of the purification member 90 and the inner peripheral surface of the case 100 can be increased at the center in the axial direction (see the region sandwiched between two-dot chain lines). That is, this region serves as a relief portion of the mat 30 and suppresses the mat 30 from being sandwiched between the cases 100.
　また、浄化部材９０を軸方向略中央の位置において径が最も大きくなる、略樽型とした。浄化部材９０がケース１００内を移動しようとした場合に、浄化部材９０の中央部が引っ掛かり、浄化部材９０のケース１００内における移動を防止することができる。
　排ガス浄化装置の更なる別実施例を、図１１において詳細に説明する。 Further, the purification member 90 has a substantially barrel shape in which the diameter becomes the largest at the position in the approximate center in the axial direction. When the purification member 90 tries to move in the case 100, the central portion of the purification member 90 is caught, and the movement of the purification member 90 in the case 100 can be prevented.
A further embodiment of the exhaust gas purification apparatus will be described in detail with reference to FIG.
　次に、本発明の実施例３を図面に基づいて説明する。図１１には、実施例３の排ガス浄化装置の軸方向の断面構成が示されている。図１１は、上記図１に対応させて表している。 Next, Embodiment 3 of the present invention will be described with reference to the drawings. FIG. 11 shows an axial sectional configuration of the exhaust gas purifying apparatus according to the third embodiment. FIG. 11 is shown corresponding to FIG.
　図１１に示されるように、排ガス浄化装置１４０は、陸上トラック（track）形状の浄化部材１５０が、略楕円（oval）形状のケース１６０によって収納されている。 As shown in FIG. 11, in the exhaust gas purifying apparatus 140, a track-shaped purification member 150 is accommodated in a substantially oval-shaped case 160.
　浄化部材１５０は、平坦面１５４と円弧面１５５とを有している。向かい合う平坦面１５４，１５４が平行に形成されていると共に、これらの平坦面１５４，１５４の両端をそれぞれ繋ぐように、半円形状の円弧面１５５，１５５が２箇所形成されている。 The purification member 150 has a flat surface 154 and a circular arc surface 155. Opposing flat surfaces 154 and 154 are formed in parallel, and two semicircular arc surfaces 155 and 155 are formed so as to connect both ends of these flat surfaces 154 and 154, respectively.
　ケース１６０は、第１ケース半体１７０と第２ケース半体１８０とを重合わせる構成とされている。第１ケース半体１７０は、浄化部材１５０の円弧面１５５と同心円状に形成されている第１曲面１７１と、この第１曲面１７１の端部から一体的に形成され第１曲面１７１とは異なる曲率半径を有する第２曲面１７２，１７２とからなる。第２ケース半体１８０も同様に、第１曲面１８１と、第２曲面１８２，１８２とからなる。第１ケース半体１７０の第１曲面１７１と第２ケース半体１８０の第１曲面１８１とは同一の形状を呈し、第１ケース半体１７０の第２曲面１７２と第２ケース半体１８０の第２曲面１８２とも同一の形状を呈している。ケース１６０は、全体が曲面によって構成されている。 The case 160 is configured to overlap the first case half 170 and the second case half 180. The first case half 170 is different from the first curved surface 171 formed concentrically with the arc surface 155 of the purification member 150 and the first curved surface 171 formed integrally from the end of the first curved surface 171. It consists of second curved surfaces 172 and 172 having a radius of curvature. Similarly, the second case half 180 includes a first curved surface 181 and second curved surfaces 182 and 182. The first curved face 171 of the first case half 170 and the first curved face 181 of the second case half 180 have the same shape, and the second curved face 172 of the first case half 170 and the second case half 180 are The second curved surface 182 has the same shape. The case 160 is entirely constituted by a curved surface.
　第１ケース半体１７０の第２曲面１７２の端部から複合ｒ形状部１７４を介して、フランジ部１７５が延びている。第２ケース半体１８０も同様である。即ち、第２ケース半体１８０の第２曲面１８２の端部から複合ｒ形状部１８４を介して、フランジ部１８５が延びている。複合ｒ形状とは、第２曲面１７２，１８２からフランジ部１７５，１８５に向かって段階的に曲率半径が変化する形状をいう。複合ｒ形状部１７４，１８４の間には隙間１６１が形成されている。 The flange portion 175 extends from the end of the second curved surface 172 of the first case half 170 via the composite r-shaped portion 174. The same applies to the second case half 180. That is, the flange portion 185 extends from the end portion of the second curved surface 182 of the second case half 180 via the composite r-shaped portion 184. The compound r shape refers to a shape in which the radius of curvature gradually changes from the second curved surfaces 172, 182 toward the flange portions 175, 185. A gap 161 is formed between the composite r-shaped portions 174 and 184.
　ケース１６０の内周面は、円弧面１５５に対して略平行に一定の距離を保って形成されると共に、平坦面１５４に対しては連続的に距離が変化するように形成されている。ケース１６０から平坦面１５４までの距離は、ケース１６０から円弧面１５５までの距離よりも長く形成されている。浄化部材１５０の平坦面１５４（浄化部材の外周面の一部）とケース１６０の内周面との間のスペースが、円弧面１５５（浄化部材の外周面の他部）とケース１６０との間のスペースよりも大きい。このように構成した排ガス浄化装置１４０においても、本発明の所定の効果を得ることができる。 The inner peripheral surface of the case 160 is formed so as to maintain a constant distance substantially parallel to the circular arc surface 155, and is formed so that the distance continuously changes with respect to the flat surface 154. The distance from the case 160 to the flat surface 154 is longer than the distance from the case 160 to the circular arc surface 155. The space between the flat surface 154 of the purification member 150 (a part of the outer peripheral surface of the purification member) and the inner peripheral surface of the case 160 is between the arc surface 155 (the other part of the outer peripheral surface of the purification member) and the case 160. Bigger than the space. Also in the exhaust gas purifying apparatus 140 configured as described above, the predetermined effect of the present invention can be obtained.
　なお、陸上トラック（track）形状の浄化部材１５０が、略楕円（oval）形状のケース１６０に収納される構成の他、略楕円形状の浄化部材が陸上トラック形状のケースに収納されていても良い。即ち、周方向において浄化部材の外周面とケースの内周面との距離が部位によって変化する構成であれば、その他の形状の浄化部材及びケースであっても採用することができる。具体的には、縦横の径が一定でない、長円形状、陸上トラック形状、幾何学楕円、複合ｒの略楕円形状を含むことができる。これにより、車載レイアウトの自由度が増す。 In addition to the configuration in which the track-shaped purification member 150 is housed in a substantially oval case 160, the substantially elliptical purification member may be housed in a land track-shaped case. . That is, as long as the distance between the outer peripheral surface of the purification member and the inner peripheral surface of the case in the circumferential direction varies depending on the region, purification members and cases having other shapes can be employed. Specifically, it may include an elliptical shape, a land track shape, a geometric ellipse, or an approximately elliptical shape of a composite r, in which the vertical and horizontal diameters are not constant. Thereby, the freedom degree of a vehicle-mounted layout increases.
　次に、本発明の実施例４を図面に基づいて説明する。図１２には、実施例４の排ガス浄化装置の軸方向の断面構成が示されている。図１２は、上記図１１に対応させて表している。図１１に示された排ガス浄化装置に対して、フランジ部の位置を変更した。 Next, a fourth embodiment of the present invention will be described with reference to the drawings. FIG. 12 shows a sectional configuration in the axial direction of the exhaust gas purifying apparatus according to the fourth embodiment. FIG. 12 is shown corresponding to FIG. The position of the flange portion was changed with respect to the exhaust gas purifying apparatus shown in FIG.
　即ち、排ガス浄化装置１４０Ａは、陸上トラック形状の浄化部材１５０が、略楕円形状のケース１６０Ａによって収納されている。 That is, in the exhaust gas purifying apparatus 140A, the land track-shaped purification member 150 is housed in a substantially elliptical case 160A.
　ケース１６０Ａは、第１ケース半体１７０Ａと第２ケース半体１８０Ａとを重合わせる構成とされている。第１ケース半体１７０Ａは、所定の曲率半径を有する第１曲面１７１Ａと、この第１曲面１７１Ａの端部から一体的に形成され円弧面１５５に対して同心円状に形成されている第２曲面１７２Ａとからなる。第２ケース半体１８０Ａも同様に、第１曲面１８１Ａと、第２曲面１８２Ａとからなる。第１ケース半体１７０Ａの第１曲面１７１Ａと第２ケース半体１８０Ａの第１曲面１８１Ａとは同一の形状を呈し、第１ケース半体１７０Ａの第２曲面１７２Ａと第２ケース半体１８０Ａの第２曲面１８２Ａとも同一の形状を呈している。ケース１６０Ａは、全体が曲面によって構成されている。 The case 160A is configured to overlap the first case half 170A and the second case half 180A. The first case half 170A has a first curved surface 171A having a predetermined radius of curvature, and a second curved surface formed integrally with the arcuate surface 155 from the end of the first curved surface 171A. 172A. Similarly, the second case half 180A includes a first curved surface 181A and a second curved surface 182A. The first curved face 171A of the first case half 170A and the first curved face 181A of the second case half 180A have the same shape, and the second curved face 172A of the first case half 170A and the second case half 180A are the same. The second curved surface 182A has the same shape. The case 160A is entirely composed of a curved surface.
　第１ケース半体１７０Ａの第２曲面１７２Ａの端部から複合ｒ形状部１７４Ａを介して、フランジ部１７５Ａが延びている。第２ケース半体１８０Ａも同様である。即ち、第２ケース半体１８０Ａの第２曲面１８２Ａの端部から複合ｒ形状部１８４Ａを介して、フランジ部１８５Ａが延びている。複合ｒ形状部１７４Ａ，１８４Ａの間には隙間１６１Ａが形成されている。 The flange portion 175A extends from the end of the second curved surface 172A of the first case half 170A via the composite r-shaped portion 174A. The same applies to the second case half 180A. That is, the flange portion 185A extends from the end portion of the second curved surface 182A of the second case half body 180A via the composite r-shaped portion 184A. A gap 161A is formed between the composite r-shaped portions 174A and 184A.
　ケース１６０Ａの内周面は、円弧面１５５に対して略平行に一定の距離を保って形成されると共に、平坦面１５４に対しては連続的に距離が変化するように形成されている。ケース１６０Ａから平坦面１５４までの距離は、ケース１６０Ａから円弧面１５５までの距離よりも長く形成されている。浄化部材１５０の平坦面１５４（浄化部材の外周面の一部）とケース１６０Ａの内周面との間のスペースが、円弧面１５５（浄化部材の外周面の他部）とケース１６０Ａの内周面との間のスペースよりも大きい。このように構成した排ガス浄化装置１４０Ａにおいても、本発明の所定の効果を得ることができる。 The inner peripheral surface of the case 160A is formed so as to maintain a constant distance substantially parallel to the circular arc surface 155, and is formed so that the distance continuously changes with respect to the flat surface 154. The distance from the case 160A to the flat surface 154 is longer than the distance from the case 160A to the circular arc surface 155. The space between the flat surface 154 of the purification member 150 (a part of the outer peripheral surface of the purification member) and the inner peripheral surface of the case 160A is an arc surface 155 (the other part of the outer peripheral surface of the purification member) and the inner periphery of the case 160A. Larger than the space between the faces. Also in the exhaust gas purifying apparatus 140A configured as described above, the predetermined effect of the present invention can be obtained.
　尚、本発明による製造方法により製造された排ガス浄化装置は、乗用車の他、バスやトラック等の車両、船舶等にも搭載することができ、乗り物に限らず、任意の装置に搭載することができる。 In addition, the exhaust gas purification device manufactured by the manufacturing method according to the present invention can be mounted not only on passenger cars but also on vehicles such as buses and trucks, ships, etc., and can be mounted not only on vehicles but also on arbitrary devices. it can.
　また、排ガス浄化装置に用いられるケースは、浄化部材の周方向の半分をそれぞれ覆う第１及び第２ケース半体を用いたが、浄化部材の軸方向の半分をそれぞれ覆う第１及び第２ケース半体を用いることもできる。 Moreover, although the case used for exhaust gas purification apparatus used the 1st and 2nd case half which covers the half of the circumferential direction of a purification member, respectively, the 1st and 2nd case which covers the half of the axial direction of a purification member, respectively Half can also be used.
　本発明に係る排ガス浄化装置の製造方法は、ディーゼル車両に用いられる排ガス浄化装置の製造に好適である。 The method for manufacturing an exhaust gas purifying apparatus according to the present invention is suitable for manufacturing an exhaust gas purifying apparatus used for a diesel vehicle.
　１０，８０，１４０，１４０Ａ…排ガス浄化装置、２０，９０，１５０…浄化部材、２４，１５４…平坦面、２５，１５５…円弧面、３０，７０…マット、４０，１００，１６０，１６０Ａ…ケース。 10, 80, 140, 140A ... exhaust gas purification device, 20, 90, 150 ... purification member, 24, 154 ... flat surface, 25, 155 ... arc surface, 30, 70 ... mat, 40, 100, 160, 160A ... case .

Claims (2)

  1. 　排ガスを浄化する浄化部材と、
    　この浄化部材に巻かれているマットと、
    　このマット及び前記浄化部材を収納する筒型のケースとからなる排ガス浄化装置において、
    　前記ケースの内周面と、前記浄化部材の外周面との距離が、前記浄化部材の部位によって異なっていることを特徴とする排ガス浄化装置。     A purification member for purifying exhaust gas;
    A mat wound around the purification member;
    In the exhaust gas purifying apparatus comprising the mat and a cylindrical case for storing the purification member,
    An exhaust gas purifying apparatus, wherein a distance between an inner peripheral surface of the case and an outer peripheral surface of the purification member differs depending on a portion of the purification member.
  2. 　排ガス浄化装置の製造方法において、
    　筒型のケースと、このケースの内周面からの距離が部位によって異なるような外周面を有する浄化部材と、弾性変形性能を有するマットとを準備する工程と、
    　前記浄化部材に前記マットを巻く工程と、
    　前記マットの巻かれた前記浄化部材を前記ケースに収納する工程とからなることを特徴とする排ガス浄化装置の製造方法。     In the method of manufacturing an exhaust gas purification device,
    Preparing a cylindrical case, a purification member having an outer peripheral surface such that the distance from the inner peripheral surface of the case varies depending on a part, and a mat having elastic deformation performance;
    Winding the mat around the purification member;
    A method for manufacturing an exhaust gas purification apparatus comprising the step of housing the purification member wound with the mat in the case.
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