JPH07308585A - Metallic carrier - Google Patents

Abstract

PURPOSE:To obtain a carrier excellent in ability to prevent disconnection between a metallic honeycomb body and a metal-made casing and excellent in durability in axial direction and radial direction of the metallic honeycomb body by forming a notched part at the end part of a planar belt-like material and/or a corrugated beltlike material constituting a stack, which is in contact with the inside wall surface of the metal-made casing. CONSTITUTION:This metallic carrier is composed of the X-lap type metallic honeycomb body for carrying an exhaust gas purifying catalyst and the metal-made casing for housing the metallic honeycomb body. The metallic honeycomb body has a structure formed by using at least three stacks X1 formed by laminating alternately the thin metallic plate-made planar belt-like material 1 and the corrugated belt-like material 2 in a desired number of stages, allowing each stack X1 to be in contact with each other at the contact end part of one end and winding around the contact end part in the same direction so as to allow each belt-like material 1, 2 of each stack to be in contact with the inside wall surface of the wrapping metal made easing. And the belt-like material 1 and/or the belt-like material 2 constituting each stack X1 have the notched parts 1A and 2A at least at the end part in contact with the inside wall surface of the metallic casing.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention generally relates to a honeycomb structure made of metal (hereinafter referred to as metal) for carrying an exhaust gas purifying catalyst which is used as an exhaust gas purifying means for automobiles by being inserted in an exhaust system. And a metal casing that encloses the metal honeycomb carrier (hereinafter, also referred to as a metal casing) as main constituent elements.

More specifically, the present invention adopts a special structure as an X-wrap type metal honeycomb body for carrying an exhaust gas purifying catalyst.
An object of the present invention is to provide a metal carrier having improved durability (thermal shock resistance) of the metal honeycomb body against thermal stress and an ability to prevent the metal honeycomb body and the metal casing from being separated (disengaged).

[0003]

2. Description of the Related Art Conventionally, in a vehicle exhaust gas purifying apparatus of this type, a ceramic monolith type carrier has been used as a honeycomb structure carrier for carrying an exhaust gas purifying catalyst (Pt, Pd, Rh, etc.). Instead, the metal monolith type is attracting attention. In general,
Metal monolithic metal carrier (MS, metal substrate) for supporting a catalyst for exhaust gas purification
Is a stack of heat-resistant thin steel plate flat strips and corrugated strips that come into contact with each other, and are spirally formed in a batch to form an exhaust gas passage in the axial direction. Of a winding type metal honeycomb body having a large number of mesh-like ventilation holes (cells), and a tubular metal casing having both ends opened for fitting and fixing the honeycomb body inside. It is something. By the roll forming of the flat plate-shaped strip material and the corrugated plate-shaped strip material, a large number of mesh-like ventilation passages (cells) serving as exhaust gas flow passages are automatically formed.

In the above-mentioned conventional metal carrier composed of a wound type metal honeycomb body and a metal casing, the wound type metal honeycomb body and the metal casing are heated to a high temperature of the exhaust gas itself and the exhaust gas. Firmly fixed by brazing or welding so as to withstand the thermal expansion and thermal stress that occur in a high temperature atmosphere due to the exothermic reaction with the exhaust gas purification catalyst, and also to withstand the severe vibration when driving a car. To be done. Further, it goes without saying that the abutting portions of the flat plate-shaped band member and the corrugated plate-shaped band member forming the metal honeycomb body are also fixed by various methods such as brazing and welding.

The wound-type metal honeycomb body constituting the above-mentioned metal carrier is superior to the ceramic monolith-type one in various respects, but has a large thermal stress generated under the severe thermal conditions. On the other hand, there is still room for improvement. Particularly, since excessive thermal stress concentrates and accumulates on the outer peripheral portion of the metal honeycomb body that abuts on the inner wall surface of the metal casing and a portion in the vicinity thereof, a flat plate-shaped strip material or a corrugated plate-shaped strip material forming the metal honeycomb body is formed. Buckles, breaks or cracks, and reduces durability. This is because the outer peripheral portion of the metal honeycomb body that comes into contact with the inner wall surface of the metal casing is composed of a set of flat plate-shaped strips and corrugated plate-shaped strips, and the set of strips is inside the metal casing. This is because they are in contact with each other along the wall surface, that is, they are joined in a planar manner, and the thermal stress generated inside the metal honeycomb body cannot be sufficiently absorbed and relaxed.

Recently, in place of the above-mentioned spiral-wound type metal honeycomb body, a minimum constituent unit constituting the metal honeycomb body, that is, a pair of flat plate-shaped strip material and corrugated plate-shaped strip material in abutting relationship In such a minimum structural unit, a metal honeycomb body having a structure in which each end of the minimum structural unit is in contact with the inner wall surface of the metal casing has been proposed. For example, as a metal honeycomb body having the above structure, Japanese Patent Laid-Open No. 62-273
051, Special Publication 3-502544, Special Publication 3-50
No. 2660, Japanese Patent Application Laid-Open No. 4-227855, and the like, S-shaped type, B-shaped type, and X-wrap type (swastoid) type metal honeycomb bodies have been proposed.

The above-mentioned S-shaped type metal honeycomb body is superior to the conventional spiral wound type honeycomb body. This is because in the conventional wound type honeycomb body, one minimum constitutional unit composed of a set of flat plate-shaped strip and corrugated plate-shaped strip as described above is arranged along the inner wall surface of the metal casing. In contrast to abutting, each end of a predetermined plurality of minimum constituent units abuts the inner wall surface of the metal casing, so that thermal stress can be absorbed and relieved at each end, and the durability of the honeycomb body is improved. This is because the property can be improved.

Among various types of metal honeycomb bodies other than the wound type constituting the above-mentioned metal carrier, especially in the X-wrap type metal honeycomb body, the durability of the outer peripheral portion is the wound type metal honeycomb as described above. It is an improvement over the body. However, there is an increasing demand for improved performance of a metal carrier having the X-wrap type metal honeycomb body as a main constituent element. For example, prevention of detachment (desorption) of a metal honeycomb body from a metal casing, metal It is required to improve the durability of the central part of the honeycomb body.

Among the characteristics required for the metal carrier whose main constituent is the X-wrap type metal honeycomb body, the metal honeycomb body is detached from the metal casing (desorption) by the outer peripheral surface portion of the metal honeycomb body. And due to the difference in temperature gradient between the inner peripheral surface of the metal casing, and is further increased by the addition of external vibration. Also,
The decrease in durability of the central portion of the metal honeycomb body is caused by the difference in temperature gradient between the central portion and the outer peripheral portion of the metal honeycomb body, and the central portion of the metal honeycomb body pops out in the axial direction of the metal honeycomb body. The prevention or suppression of such phenomenon (which is said to be telescoping, film-out, etc.) is a major issue.

In particular, the X-wrap type metal honeycomb body has at least three stacks (X _{1 to} X) formed by alternately stacking flat plate-shaped band members and corrugated plate-shaped band members in a desired number of stages.
_(n , n is an integer of 3 or more) are abutted to each other at one contact end, and each stack is wound around the contact end in the same direction. Has a structure that is weak against a large thermal stress generated inside the metal honeycomb body. Therefore, in the metal carrier using the X-wrap type metal honeycomb body, in addition to improving the above-mentioned ability to prevent the metal honeycomb body and the metal casing from being separated (disengaged), the central portion of the metal honeycomb body has a structure. Special consideration must be given to the improvement of durability (thermal shock resistance). In addition, deformation, buckling, cracking, breakage, and the like of the strip material (flat plate strip material and corrugated strip material) that composes the metal honeycomb body are induced in conjunction with the telescoping phenomenon. How to reduce should also be considered.

[0011]

The present invention is based on the above-mentioned X
-To overcome the drawbacks of a metal carrier (MS) having a lap-type metal honeycomb body as a main component. The present inventors have diligently studied to solve the above-mentioned drawbacks. As a result, in the X-wrap type metal honeycomb body which is a component of the metal carrier, the stack (X _{1 to} X _n , which is used for manufacturing the metal honeycomb body,
n is an integer of 3 or more), and the flat band member and / or the corrugated plate member, which is a constituent member of each stack, has a cutout portion at least at an end portion in contact with the inner wall surface of the metal casing. It has been found that the above-mentioned drawbacks can be effectively eliminated in the case of being composed of one.

Further, the notch provided in each stack member (flat plate-shaped strip and / or corrugated strip-shaped strip) with respect to a large deformation force due to thermal stress generated inside the metal honeycomb body. It has also been found that the durability of the metal honeycomb body in the radial direction as well as in the axial direction is improved because it acts as an effective absorption relaxation zone. The present invention has been completed on the basis of the above-mentioned findings, and the present invention not only prevents the metal honeycomb body from being separated (disengaged) from the metal casing, but also improves the axial direction and the radial direction of the metal honeycomb body. Provided is a metal carrier mainly composed of an economical X-wrap type metal honeycomb body having excellent durability.

[0013]

SUMMARY OF THE INVENTION The present invention will be described in brief. In the present invention, flat plate strips (1) and corrugated strips (2) made of thin metal plates are alternately laminated in a desired number of stages. At least three stacks (X _{1 to} X _n , n is an integer of 3 or more) that are formed are used, and the stacks are brought into contact with each other at their contact ends, and the same contact center is used. Of the X-wrap type for carrying the exhaust gas purifying catalyst, which is formed by winding in the direction of the stack and is in contact with the inner wall surface of the metal casing that is encased by the flat plate-shaped strips and corrugated strip-shaped strips of each stack. Metal honeycomb body (XH) and the metal honeycomb body (XH)
In a metal carrier comprising a metal casing (C) for accommodating the above, a flat plate-shaped strip (1) and / or a corrugated plate-shaped strip (2) constituting each of the stacks (X _{1 to} X _n ), The present invention relates to a metal carrier, which is characterized by having a cutout portion at least at an end portion that abuts an inner wall surface of a metal casing (C).

The technical configuration and embodiments of the present invention will be described in detail below with reference to the drawings. Needless to say, the present invention is not limited to the illustrated one.

As described above, according to the present invention, the X-wrap type metal honeycomb body and the metal casing, which are the main components of the metal carrier, are constituted by the former having a special structure. It is characterized by improving the characteristics of. That is, the metal carrier of the present invention is characterized in that an X-wrap type metal honeycomb body having a special structure is used.

Here, for the understanding of the present invention, an X-wrap type metal honeycomb body (XH ') which is a main component of the conventional metal carrier (MS') will be described. Conventional X-wrap type metal honeycomb body (XH
') And its manufacturing process are outlined in Figures 14 to 1.
6 is shown. That is, FIG. 14 shows a front view of a conventional X-wrap type metal honeycomb body (XH ′), and FIG. 15 shows four conventional stacks (XH ′) used to manufacture the metal honeycomb body (XH ′). X ₁ ', X ₂ ',
X ₃ ′, X ₄ ′) and their arrangements are shown in FIG.
X-wrap type metal honeycomb body (X
It is an enlarged view of the central part of H '). 14 to 16
In FIG. 4, only a part of the flat plate-shaped strip (1) and the corrugated plate-shaped strip (2) are shown for the sake of clarity, and the others are omitted.

The conventional X- which the present invention aims to improve
The shape structure of the lap type metal honeycomb body (XH ') is not limited to that shown in FIG.
Those disclosed in, for example, No. 7855 are applicable. That is,
By changing the front (cross-section) shape of each stack (X ₁ 'to X _n ') constituting the X-wrap type metal honeycomb body (XH ') and the setting method of the contact end, the front shape is Not only the circular shape shown in FIG. 14, but also various shapes such as an elliptical shape and a race track shape are targeted. 14 to 16 in the art.
As shown in FIG. 3, in this type of metal honeycomb body, the contact state at the contact end portion (center portion of the metal honeycomb body) of each stack is X-shaped or swastika-shaped.
– Commonly known as wrap or swastika type. Therefore,
It should be noted that in the present invention, the X-wrap type metal honeycomb body is a general term for those manufactured by the above manufacturing process.

The above-mentioned conventional X-wrap type metal honeycomb body (XH ') has (a) a flat metal strip (1') and a corrugated strip (2 ') made of a thin metal plate alternately. Multiple stacks of at least three or more stacked in desired number
(B) The stacks are brought into contact with each other at their one ends by using a desired jig or the like, and (c) the stacks are made identical with each other with the contact body as the center. It is manufactured by a manufacturing process in which winding molding is performed so as to be wound in a direction. A jig having a desired structure suitable for holding or sandwiching one end of each stack used in the step (b) is an X-wrap type in which each stack is wound around the jig in the same direction. After manufacturing the metal honeycomb body (XH '), it may be removed or integrated with the metal honeycomb body (XH'). In addition,
As shown in the figure, a large number of cells (3) serving as exhaust gas passages are automatically formed by forming a stack from the flat band material (1 ') and the corrugated plate material (2') and then winding and forming the stack. Formed. In the structure shown in FIG. 14, one end of each stack is brought into contact with each other at an intersection angle of 90 ° in the step (a), and winding-molded in the step (c) to form an X-wrap type metal honeycomb body (XH ′). It was done.

The conventional X-wrap type metal honeycomb body (XH ') manufactured as described above is
As shown in FIG. 14, the metal case (C) is filled and fixed to form a metal carrier (MS ′).

As described above, the conventional X-wrap type metal honeycomb body (XH ') has improved durability, particularly durability of the outer peripheral portion, as compared with, for example, a wound type metal honeycomb body. It is a thing. However, as described above, in the relative relationship between the durability of the metal honeycomb body and the metal casing against separation (desorption) and the improved durability of the outer peripheral portion of these metal honeycomb bodies, conversely, the central portion ( There is a strong demand for improved durability in the axial and radial directions.

The present invention adopts the above-mentioned technical structure in order to meet the above-mentioned required problems in a metal carrier having an X-wrap type metal honeycomb body as a main constituent element. Hereinafter, specific embodiments of the present invention will be described with reference to the drawings, but the present invention is not limited to these embodiments. In addition, in order to clarify the figure,
Only some flat strips (1) and corrugated strips (2) are shown.

1 to 2 and 6 are views for explaining the metal carrier (MS) of the first embodiment of the present invention.
FIG. 1 is a perspective view of a flat strip (1) used for producing a metal carrier (MS) according to a first embodiment of the present invention, and FIG. 2 shows the flat strip (1). Corrugated strip (2)
FIG. 6 is a partial perspective view of a stack (X ₁ ) made of, and FIG. 6 includes an X-wrap type metal honeycomb body (XH) manufactured using the stack (X ₁ ) and a metal casing (C). It is a front view of the metal carrier (MS) of the first embodiment of the present invention.

As shown in FIG. 1, the flat strip (1) which is a constituent member of the stack (X ₁ ) of the present invention has a desired size (width W ₁ × length L ₁ ) at one end thereof. ) Notch (1
The point having A) has a large feature point. The above-mentioned points are completely different from the configuration of the conventional flat strip (1 ') shown in FIG. In addition, in FIG. 1, the width of the flat strip (1) (therefore, the length of the shaft in the case of a metal honeycomb body) is indicated by W, and the length is indicated by L. The size of the notch (W ₁ × L ₁ ) may be appropriately determined based on the desired size.

In the present invention, the cutout portion (1A) of the flat strip (1) is made into a stack (X ₁ ) by combining the flat strip (1) with the corrugated strip (2). FIG. 15 described above.
According to the manufacturing process shown in, the metal honeycomb body (X
H), the metal casing (C) is arranged at a portion in contact with the inner wall surface. The above-mentioned point is shown in FIG. 6 as a region between the metal casing (C) and the dashed line, that is, a so-called notch existing region (B).

In the present invention, the notch existing region (B)
Performs an extremely important function. In this respect, for example, during the use of the metal carrier (MS), a large deformation force due to thermal stress is generated inside the metal honeycomb body (XH),
When this acts as a force for separating the metal honeycomb body (XH) between the metal casings (C), the notch existing region (B) effectively absorbs such deformation force,
Acts as a relaxing zone.

Further, since the central portion of the metal honeycomb body (XH) is exposed to a higher temperature than other portions and a large thermal stress is generated, its constituent members tend to be largely deformed (film out) in the axial direction. However, the area where the cutout exists (B)
Provides a relief space for such deformation force, and reduces or alleviates large axial deformation (film-out).

In the present invention, the flat strip material (1) used for producing the X-wrap type metal honeycomb body (XH) is used when a usual metal monolith type honeycomb body is produced. Used strips,
For example, chrome steel (chrome 13% to 25%), Fe-Cr
Heat resistant stainless steel such as 20% -Al5%, or a rare earth metal (R for improving high temperature oxidation resistance
EM) added heat resistant stainless steel, etc.
A band material of about 04 mm to 0.1 mm is used. As the corrugated strip material (2), the corrugated plate material (1) corrugated so as to have a predetermined substantially sine wave, substantially triangular wave or substantially trapezoidal wave is used. It is to be noted that the flat strip (1) and the corrugated strip (2) containing Al,
Alternatively, a material having an Al layer formed on the surface thereof is heat-treated, and whisker-like or mushroom-like alumina (Al ₂ O ₃ ) is deposited on the surface thereof. The whisker-like alumina is preferable because it can firmly hold the washcoat layer for carrying the exhaust gas purifying catalyst such as Pt, Pd, and Rh.

In the present invention, as the material of the metal casing (C) into which the X-wrap type metal honeycomb body (XH) is filled and fixed, a strip material () that constitutes the metal honeycomb body (XH) is used. The same type of heat-resistant steel as in 1) and 2) may be used, or a steel having high heat and corrosion resistance may be used. In addition, a double structure with the outer part of the metal material more heat and corrosion resistant than the inner part, specifically, one using ferritic stainless steel for the inner part and austenitic stainless steel for the outer part is used May be.

The metal carrier (M
In S), the abutting portions of the strips (the flat strip and the corrugated strip) forming the X-wrap type metal honeycomb body (XH) are fixed, and the metal honeycomb body (XH) and the metal casing ( The abutment portion C) may be fixed according to a common method in the art such as brazing and welding. For example, in the case of adopting brazing, it is possible to dip an aqueous dispersion of a high temperature brazing material such as Ni-based, which is well known in the art, to apply a powdered brazing material after applying a binder, to apply a plating technique, to use an amorphous brazing material foil, etc. The brazing material may be applied to the metal honeycomb carrier or its constituent members by a conventionally known method such as application of high temperature brazing material foil. Then in a non-oxidizing atmosphere,
Appropriate conditions for melting the brazing material such as heat treatment under reduced pressure,
It suffices to select and perform brazing.

3 to 4 and 6 are views for explaining the metal carrier (MS) of the second embodiment of the present invention.
A major difference from the first embodiment is that a corrugated plate material (2) is provided with a notch (2A) as shown in FIG. 3, and other technical configurations are the same. is there. Even in the mode in which the cutout portion (2A) is provided in the corrugated strip material (2), the same effect as in the first embodiment can be obtained.

5 to 7 are views for explaining the metal carrier (MS) of the third embodiment of the present invention. A major difference from the first or second embodiment is that the cutout portions (1A, 1A, 2A) are formed in both the flat strip (1) and the corrugated strip (2).
2A) is provided. As described above, when the notches are provided in both the strips (1, 2), the notch existing area (B) shown in FIG. 6 forms a space. The above points are shown in FIG. FIG. 7 is an axial cross-sectional view of the metal honeycomb body (MS) of the third embodiment, in which the notch portion existing region (B) is constituted by a space portion (SP) having a desired size. It is shown. Due to the formation of the space portion (SP), effects such as stress relaxation effect, exhaust gas agitation and turbulence effect can be obtained in the space portion (SP) depending on its size.

8 to 9 are views for explaining the metal carrier (MS) of the fourth embodiment of the present invention. A big difference from the third embodiment is that, as shown in FIG. 8, notched portions (1A, 1A) having a desired size are formed at both ends of a flat strip (1). Further, although not shown, the corrugated plate material (2) is also formed with notches (2A, 2A) of the same size as the notches (1A, 1A) at both ends thereof in the same manner. Is used to form a stack (X ₁ ), and the stack is used to form a metal honeycomb body (XH).

In the case of the above-mentioned embodiment, as shown in FIG. 9, the notch forming region (B ₁ ) is formed also in the central portion of the metal honeycomb body (XH). Needless to say, it goes without saying that the two notch forming regions (B, B ₁ ) form a space (SP) having a desired size. The space portion (SP) of the cutout portion forming region (B ₁ ) serves as a zone for relaxing the axial deformation force of the metal honeycomb body (XH), and a zone for turbulent exhaust gas flow. This is preferable in order to make the temperature inside the metal honeycomb body more uniform in relation to the above function.

10 to 13 show various modified examples of the arrangement of the notch in the present invention.
Similar effects can be obtained by using the strips (1, 2) having such cutouts. FIG. 10 shows a mode in which three notches (1A, 1A, 1A) are arranged on the flat strip (1). FIG. 11 shows a mode in which two slits (long holes) (1A ₁ , 1A ₁ ) are provided in the flat plate-shaped strip (1) as cutouts.
FIG. 12 shows a mode in which two slits (oblong holes) (2A ₁ , 2A ₁ ) are arranged on the corrugated strip (2) as cutouts. In FIG. 13, two slits are arranged in the flat strip (1) as cutouts, and the strips between the slits are bent so that the cutouts (1
A ₂ ) has been formed. Note that FIG.
1 (a) is a partial perspective view and FIG. 1 (b) is a sectional view taken along line I-I. In the present invention, it goes without saying that in forming the various cutouts and slits (oblong holes), their size and shape may be appropriately determined.

[0035]

The metal carrier comprising the metal honeycomb body of the present invention and the metal casing enclosing the metal honeycomb body is (i) the metal honeycomb body is composed of an X-wrap type metal honeycomb body. (Ii) A stack used for manufacturing the X-wrap type metal honeycomb body (X _{1 to} X _n , n is an integer of 3 or more)
However, as a constituent member thereof, a flat plate-shaped strip member and / or a corrugated plate-shaped strip member is configured to have a cutout portion at least at the end portion that abuts the inner wall surface of the metal casing. It has a specific structure.

The metal carrier of the present invention, by adopting the above-mentioned technical structure, has a notch forming region in the metal honeycomb body, particularly in a portion abutting the inner wall surface of the metal casing and in the vicinity thereof. In the cutout forming region, (i) during use of the metal carrier, a large deformation force is generated inside the metal honeycomb body due to thermal stress, which causes a separation (desorption) between the metal honeycomb body and the metal casing. ), But functions as a zone that absorbs and relaxes the deformation force, and (ii) the central part of the metal honeycomb body is exposed to higher temperatures than other parts and is larger than other parts. Since thermal stress is generated, a force acts to largely deform (film-out, telescoping) the constituent members (flat plate material and corrugated material) in the axial direction, but the deformation force is absorbed. , And acts as a relaxing zone, and further, (iii) a large deformation force is generated in the metal honeycomb body in the radial direction based on the thermal stress, particularly in the contact surface portion between the metal honeycomb body and the metal casing. metal Deformation of the honeycomb body member (flat strip and the corrugated strip), buckling, but when you to provoke and damage,
It functions as a zone that absorbs and relaxes the deforming force, and when (iv) the notch formation region is also formed in the center of the metal honeycomb body, the function of (ii) is enhanced. At the same time, when the notch forming region forms a space, it promotes turbulence of the exhaust gas, thus achieving uniform and high purification performance.

From the above, according to the present invention, the X-wrap type is excellent not only in the ability to prevent the metal honeycomb body and the metal casing from being separated (detached) but also in the axial and radial durability of the metal honeycomb body. An unprecedented excellent metal carrier having the metal honeycomb body as a main constituent unit is provided.

[Brief description of drawings]

FIG. 1 is a metal carrier (MS) according to a first embodiment of the present invention.
It is a perspective view of the flat strip (1) used for manufacturing.

FIG. 2 is a metal carrier (M of the first embodiment constituted by the flat strip (1) and the corrugated strip (2) shown in FIG.
FIG. 7 is a partial perspective view of a stack used to manufacture S).

FIG. 3 is a metal carrier (MS) according to the second embodiment of the present invention.
FIG. 3 is a perspective view of a corrugated strip (2) used for manufacturing the.

4 is a metal carrier (M of the second embodiment constituted by the corrugated strip (2) and the flat strip (1) shown in FIG.
FIG. 7 is a partial perspective view of a stack used to manufacture S).

FIG. 5: Metal carrier (MS) of the third embodiment of the present invention
FIG. 6 is a partial perspective view of a stack used to manufacture the.

FIG. 6 is a partially transparent front view of the metal carrier (MS) according to the first to third embodiments of the present invention.

FIG. 7: Metal carrier (MS) according to the third embodiment of the present invention.
FIG. 3 is an axial sectional view of FIG.

FIG. 8 is a metal carrier (MS) according to a fourth embodiment of the present invention.
It is a perspective view of the flat strip (1) used for manufacturing.

FIG. 9 is a metal carrier (MS) according to the fourth embodiment of the present invention.
FIG.

FIG. 10 is a partial perspective view of a flat strip having three notches, showing a first modification of the arrangement of the notches of the present invention.

FIG. 11 is a partial perspective view of a flat strip having two slits, showing a second modification of the cutout arranging mode of the present invention.

FIG. 12 is a partial perspective view of a corrugated plate-shaped band member in which two slits are formed, showing a third modified example of the arrangement mode of the cutout portions of the present invention.

FIG. 13 is a view showing a fourth embodiment of the disposition mode of the notch portion of the present invention, in which two slits are formed in the flat plate-shaped strip and the strip between the slits is bent. FIG. 7 is a partial perspective view of the one in which the cutout portion is formed.

FIG. 14 is a metal carrier (MS having a conventional X-wrap type metal honeycomb body (XH ′) as a main constituent element;
') Is a front view with a part omitted.

FIG. 15: Four stacks (X ₁ ′, X ₂ ′, X ₃ ′, X ₄ ′) and their arrangement used to manufacture the conventional metal honeycomb body (XH ′) shown in FIG. It is a figure explaining a relationship.

FIG. 16 is an enlarged view of a central portion of the conventional metal honeycomb body (XH ′) shown in FIG.

[Explanation of symbols]

MS: Metal carrier XH: Metal honeycomb body C: Metal casing 1A, 2A, 1A ₁ , 2A ₁ , 1A ₂ ………… Cutout B ……………… Cutout Part existence area SP ………… Spatial part 1,1 ′ …………… Plate-shaped strip 2,2 ′ …………… Corrugated strip 3 …………… Cell (mesh-like ventilation holes) Road) X ₁ …………… Stack of the present invention X ′ ₁ , X ′ ₂ , X ′ ₃ , X ′ ₄ ……… Conventional stack MS ′ …………… Conventional metal carrier XH ₁ ´ …… ……… Conventional metal honeycomb body

Claims (8)

[Claims] 1. At least three stacks (X _{1 to} X _n , n are formed by alternately laminating flat-plate strips (1) and corrugated strips (2) made of thin metal plates in a desired number of stages. An integer of 3 or more), the stacks are brought into contact with each other at the contact ends at one end, and are wound in the same direction around the contact ends, and each flat strip of each stack is formed. And an X-wrap type metal honeycomb body (XH) for carrying an exhaust gas purifying catalyst having a structure in which the inner wall surface of a metal casing, which is surrounded by a corrugated plate material, is held, and the metal honeycomb body (XH) A metal casing (C) for accommodating the above, and a flat strip (1) and / or a corrugated strip (2) constituting each of the stacks (X _{1 to} X _n ), Cut at least at the end contacting the inner wall surface of the metal casing (C). Parts that have been configured by having a metal carrier according to claim. 2. A flat end strip (1) and / or a corrugated strip (2) forming each of the stacks (X _{1 to} X _n ) has a contact end with each stack and a metal casing. (C) The metal carrier according to claim 1, wherein the metal carrier has notches at both end portions that come into contact with the inner wall surface. 3. The metal carrier according to claim 1, wherein the notch is formed only in the flat strip (1). 4. The metal carrier according to claim 1, wherein the notch is formed only in the corrugated strip (2). 5. The metal carrier according to claim 1, wherein the notch is formed in both the flat strip (1) and the corrugated strip (2). 6. The metal carrier according to claim 1, wherein the notch is composed of a plurality of one or two or more. 7. The metal carrier according to claim 1, wherein the cutout portion is formed of one or more slits (oblong holes). 8. The metal carrier according to claim 1, wherein the cutout portion is formed by two or more slits, and the band member between the slits is bent.