JPH094445A - Metal carrier - Google Patents

Abstract

PURPOSE: To improve durability and vibration resistance by adding an area increasing type reinforcing plate to at least one stack in a metal carrier formed by winding the desired number of stacks formed by alternately laminating thin metal flat plate wavy plate belt materials in desired stages. CONSTITUTION: In the desired number of stacks formed by laminating a thin metal flat plate belt material 1 and a wavy plate belt material in the desired number of stages, an S type metal hanicum body H formed by winding this approximately around its center is housed in a metal casing C and a reinforcing plate 11 is added to the flat plate material 1. This reinforcing plate 11 is formed so as to increase from its center part (a) to the direction of both end parts in its area. Thus, in the mass of a protective mirror plate by a unit length from the center part to the direction of an outer edge, since the center part is smaller compared with the outer edge part, the vibration resistance of the metal hanicum H to a vibration load from the outside in its center part is improved.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is generally used as an exhaust gas purifying means for an automobile by being inserted in an exhaust system.
The present invention relates to a metal carrier having a metal honeycomb structure (hereinafter referred to as a metal honeycomb body) for supporting an exhaust gas purification catalyst as a main constituent element.

More specifically, the present invention adopts an S-shaped type or a tongue-shaped type metal honeycomb body in place of the conventional typical wound type metal honeycomb body, and the constituent members of the metal honeycomb body. The present invention relates to a metal carrier having a new structure in which a reinforcing plate having a special structure is applied to (a flat plate-shaped band member and a corrugated plate-shaped band member) to improve the durability and vibration resistance of the metal honeycomb body portion.

[0003]

2. Description of the Related Art A typical conventional exhaust gas purification metal carrier is, as shown in FIGS. 14 to 15, (i) a flat plate material and a corrugated material made of a heat-resistant thin metal plate. A honeycomb structure made of a material, the metal honeycomb body (H ′) for supporting an exhaust gas purification catalyst (for example, a catalyst system using Pt, Rh, Pd, etc.), and the metal honeycomb body ( H ') is housed inside and fixed to a metal casing (hereinafter referred to as a metal casing, abbreviated as C).
To use. ), And consist of. In addition,
In the industry, the metal carrier is a metal support or a metal substrate.
l Substrate), and the abbreviation MS is used. The abbreviation MS is also used in the description of the present invention. Further, hereinafter, with respect to the metal honeycomb body, the conventional one is represented by (H ′) and the present invention is represented by the abbreviated symbol (H) after the honeycomb structure.

The metal honeycomb body (H ') which is a main constituent element of the above-mentioned conventional metal carrier (MS) is as follows:
Various structures have been proposed. 14 to FIG.
The metal honeycomb body (H ') shown in FIG. 15 is called a winding type because a flat strip and a corrugated strip are laminated in a roll as shown in FIG. Is. FIG. 14 is a perspective view of a metal carrier (MS) in which a conventional winding type metal honeycomb body (H ′) is fixed in a metal casing (C), and FIG. 15 is a conventional winding type metal. The front view of the honeycomb body (H ') is shown.

The above-mentioned conventional wound type metal honeycomb body (H ') has, for example, 100 μm or less (preferably 5 μm or less).
The flat strip (1) made of a heat-resistant thin steel plate (0 μm or less) and the corrugated strip (2) prepared by corrugating the flat strip (1) are mutually applied. Stacked so as to have a contact portion, and spirally forming it in a batch so as to form a large number of mesh-like vent holes (cells) for the exhaust gas passage in the axial direction.
This is a honeycomb structure having (3).

The conventional metal carrier (MS) is manufactured by accommodating the wound type metal honeycomb body (H ') inside the metal casing (C) and fixing it. Needless to say, since the metal carrier (MS) is used under the severe thermal environment condition of the exhaust gas system, the metal honeycomb body (H ') and the metal casing (C) are firmly fixed to each other and manufactured. It is what is done.

That is, both the constituent elements of the metal honeycomb body (H ') and the metal casing (C) have a high temperature of the exhaust gas itself and a contact reaction (exothermic heat) between the exhaust gas and the carried exhaust gas purifying catalyst. The metal honeycomb body is exposed to the high temperature generated by the reaction), and a large deformation force due to the thermal stress is particularly induced inside the metal honeycomb body, so that the metal honeycomb body is firmly fixed so as to withstand the thermal stress. As the fixing means, fixing means such as welding and brazing are adopted in the art.

More specifically, the metal honeycomb body (H '
) And the metal casing (C) are firmly fixed to each other from the viewpoint of preventing separation of these components. As the fixing method described above, for example, a large thermal stress is generated inside the metal honeycomb body (H '),
Since this concentrates and accumulates on the contact surfaces of both components and induces the separation of both components, a method has been proposed in which a specific portion of the contact surfaces is fixed in order to absorb and alleviate the thermal stress. (See, for example, Japanese Utility Model Laid-Open No. 62-19443).

Also in the metal honeycomb body (H '), from the viewpoint of ensuring the durability under the above-mentioned severe use conditions, the flat plate-shaped strip (1) and the corrugated plate-shaped strip (1) which are the constituent members thereof are used. The contact portion of 2) is fixed by various methods and methods. For example, the contact portion between the flat plate-shaped strip (1) and the corrugated plate-shaped strip (2) at a predetermined portion inside the metal honeycomb body is fixed by brazing or welding (for example, JP-B-63-44466). , JP-A-2-218442).

A wound type metal honeycomb body (H ') which is a main constituent element of the conventional metal carrier (MS) described above.
) Is superior to the conventional ceramic monolith type in various points, but it still leaves room for improvement with respect to the large thermal stress generated under the severe thermal use conditions described above. . In particular, a large deformation force based on the thermal stress generated inside the metal honeycomb body is concentrated and accumulated on the outer peripheral portion of the metal honeycomb body that abuts on the inner wall surface (inner peripheral surface) of the metal casing (C) and a portion in the vicinity thereof. For,
Detachment between both components (metal honeycomb body and metal casing) and deformation, buckling and damage of the components of the metal honeycomb body (flat plate member and corrugated plate member) at the above-mentioned parts, and durability Greatly impairs sex.

In the conventional wound type metal honeycomb body (H '), this is because the outer peripheral portion of the metal honeycomb body (H') abutting on the inner wall surface of the metal casing (C) is the outer peripheral portion. Of the flat plate-shaped strip (1) and the corrugated plate-shaped strip (2) are in contact with each other along the inner wall surface of the metal casing (C). This is because the structures are in contact with each other, and a large deformation force due to thermal stress cannot be sufficiently absorbed and relaxed.

Recently, in place of the above-mentioned spiral-wound type metal honeycomb body (H '), a minimum constitutional unit consisting of a set of a flat plate-shaped strip (1) and a corrugated plate-shaped strip (2) is used. A metal honeycomb body having a structure in which a plurality of sets are used and each end portion (each end portion of the flat plate-shaped strip and the corrugated plate-shaped strip) contacts the inner wall surface of the metal casing (C) (H ') has been proposed. A metal honeycomb body (H ') having a new structure of this type is disclosed in, for example, JP-A-62-2.
No. 73051 (Japanese Patent Publication No. 4-64740) proposes an S-shaped type, and Japanese Patent Publication No. 3-502660 proposes a so-called type.

The above-mentioned S-shaped or Tomoe-shaped metal honeycomb body (H ') is an object of improvement of the present invention, as will be described later, and is shown for the understanding of the present invention. There is. That is, an outline of the structure and manufacturing process of the S-shaped metal honeycomb body (H ′) is shown in FIGS.
8 and is also a Tomoe type metal honeycomb body (H '
19) to FIG. 20 show an outline of the structure and the manufacturing process. The details of the structure and manufacturing process of these S-shaped or honeycomb-shaped metal honeycomb bodies (H ′) will be described later.

The above-mentioned S-shaped or Tomoe-shaped metal honeycomb body (H ') absorbs thermal stress as compared with the conventional spiral wound type metal honeycomb body (H').
It has excellent relaxation characteristics. As described above, in the conventional winding type metal honeycomb body (H '), the end of one minimum structural unit (a set of flat plate-shaped strip and corrugated strip-shaped strip) has a metal casing ( In contrast to the contact along the inner wall surface of C), in the above-mentioned S-shaped or toe-shaped metal honeycomb body (H ′), each end of a desired number of minimum units is This is because the metal casing (C) is in contact with the inner wall surface of the metal casing (C), so that thermal stress can be absorbed and relieved at each end.

As described above, in the conventional S-shaped or tongue-shaped metal honeycomb body (H '), the thermal stress concentrated and accumulated on the outer peripheral portion of the metal honeycomb body and the vicinity thereof is reduced by each minimum constitutional unit ( (A set of flat strip and corrugated strip)
Can be absorbed and alleviated by each of them, so that the durability of the metal honeycomb body is improved to some extent.

However, higher performance and characteristics are required for the S-shaped or toe-shaped metal honeycomb body (H '). For example, these S
In the metal honeycomb body (H ') with a special structure of a character type or a toroidal type, when the center part and the outer peripheral part are compared, the durability of the outer peripheral part is improved as described above. As a result, the durability of the central part is reduced in the physical relationship. In particular, since this kind of metal honeycomb body is used under the condition that a strong vibration is applied, improvement of vibration resistance of the central portion is strongly demanded. Further, even in the outer peripheral part of the metal honeycomb body, although the property of absorbing and relaxing the thermal stress is superior to that of the conventional wound type, a large deformation force due to the thermal stress is concentrated and accumulated in the outer peripheral part. Since it is a part to be opened, higher durability is required.

[0017]

DISCLOSURE OF THE INVENTION The present invention has been made in order to meet the sophistication of the required characteristics of the above-mentioned conventional S-shaped or bevel-shaped metal honeycomb body (H '). The present inventors diligently studied to improve the S-shaped or Tomoe-shaped metal honeycomb body (H '). As a result, the conventional S-shaped or Tomoe-shaped metal honeycomb body (H ') is formed by stacking flat strips and corrugated strips alternately and in a desired number of steps. In the stack, the flat plate-shaped strip material (or corrugated plate-shaped strip material) from the central portion to the outer edge portion (the portion contacting the inner wall surface of the metal casing) of the stack is manufactured. It was found that the above-mentioned required characteristics can be achieved when an area-increasing reinforcing plate having an increased area is applied as a constituent member of the stack in the direction of.

The present invention has been completed on the basis of the above-mentioned findings, and a metal whose main constituent element is an S-shaped or bead-shaped metal honeycomb body excellent in vibration resistance and durability according to the present invention. A carrier (MS) is provided.

[0019]

The present invention will be summarized as follows.
According to the present invention, a desired number of stacks (S = S) are formed by alternately laminating thin metal flat plate strips and corrugated strip strips in a desired number of stages.
1 to Sn, n is an integer greater than or equal to 1) and integrally wound around the substantially central portion of each stack, and the end portions of each flat plate-shaped strip and corrugated strip-shaped strip of each stack A metal honeycomb body of an S-shaped type or a tongue-shaped type for supporting an exhaust gas purifying catalyst, which has a structure of abutting against the inner wall surface of a metal casing which is encapsulated, and a metal casing which encapsulates the metal honeycomb body. In the metal carrier consisting of
At least one stack (S) of the desired number of stacks is (i) in addition to the flat strip and corrugated strip,
(ii) A reinforcing plate that is of an area-increasing type and is integrated with the surface of the flat strip from the center of the flat strip to the outer edge (the portion that contacts the inner wall surface of the metal casing). The present invention relates to a metal carrier, which is characterized by being configured by using.

Hereinafter, the technical constitution and embodiments of the present invention will be described in detail with reference to the drawings. It is needless to say that the present invention is not limited to the illustrated one.

As described above, the metal carrier (M
S) is a conventional S-shaped metal honeycomb body shown in FIGS. 16 to 18 and a toy-shaped metal honeycomb body shown in FIGS. 19 to 20 as a metal honeycomb body (H) which is a main component thereof. A feature is that an improved version of (H ') is adopted. The present invention particularly relates to a metal carrier (MS) using a metal honeycomb body of this type having a special structure, which has excellent strength characteristics, durability of the metal honeycomb body portion, and vibration resistance of the central portion (MS). ) Is intended to be provided.

Therefore, in order to facilitate understanding of the present invention, first, the above-mentioned conventional S-shaped type and toe-shaped type metal honeycomb bodies (H ') to be improved will be described. An outline of the conventional S-shaped type metal honeycomb body (H ′) and its manufacturing process is shown in FIG.
It is shown in FIG. That is, FIG. 16 is a front view of a conventional S-shaped type metal honeycomb body (H ′).
7 shows a perspective view of a conventional stack (S1 ') used for manufacturing the metal honeycomb body (H'), and FIG.
Reference numeral 8 indicates that two roll forming jigs (W1, W2) are arranged on the upper and lower outermost surfaces of the substantially central portion of the stack (S1 '), and the roll forming jigs are wound in the same direction to form S. It shows a method for manufacturing a V-shaped metal honeycomb body (H '). In addition,
16 to 17, in order to clarify the drawings, only a part of the flat plate-shaped strip (1) and the corrugated plate-shaped strip (2) are shown, and the others are omitted.

As shown in the figure, the conventional S-shaped metal honeycomb body (H ') comprises a pair of flat plate-shaped strips (1) and corrugated strips (2) made of thin steel plates. Manufactured as the smallest unit. That is, as shown in FIG. 17, the flat strip (1) and the corrugated strip (2) are alternately laminated in a desired number of steps to form a stack (S1 '), and then as shown in FIG. And two winding molding jigs (W1, W2) are arranged on the outer surface (upper surface and lower surface) of the stack (S1 '),
By winding the winding forming jig in the same direction (for example, clockwise direction), the S-shaped metal honeycomb body (H ') shown in FIG. 16 is manufactured. In the figure, (3)
Indicates a cell. As shown in FIG. 16, at the center of the metal honeycomb body (H '), the stack (S1
Since the flat band material (1) and the corrugated plate material (2) that form () have an S-shaped curved shape, in the industry, this type of metal honeycomb body (H ') Is commonly called an S-shaped metal honeycomb body.

Therefore, it should be noted that the S-shaped metal honeycomb body (H) in the present invention is a general term for those manufactured by the above manufacturing process.
That is, the S-shaped metal honeycomb body (H) of the present invention
Is a Tomoe type metal honeycomb body (H) described below.
Needless to say, the number of stacks to be used may be a desired one.

The conventional S-shaped type metal honeycomb body (H ') manufactured as described above is loaded into a metal casing (C) prepared as a separate body as shown in FIG. Then, the metal carrier (MS) is fixed and fixed.

Next, in order to facilitate understanding of the present invention, a toe-shaped metal honeycomb body (H ') which is a main constituent element of the conventional metal honeycomb body (MS) will be described. 19 to 20 show an outline including a conventional B-shaped metal honeycomb body (H ') and its manufacturing process. Note that FIG. 19 is a front view of the metal honeycomb body (H ') of the tomoid type, but for the sake of clarity, a part of the flat plate-shaped strip (1) and the corrugated plate-shaped strip (2) are shown. Only those are shown, others are omitted.

The toe-shaped metal honeycomb body (H '
) Is manufactured as follows, as shown in FIG. That is, three stacks (S1 ', S2', S3 ') formed by laminating flat plate strips (1) and corrugated strip strips (2) in a desired number of stages are used, and the central angle of each stack is Combine them by making them 120 ° and abutting each other.
Next, a total of three winding molding jigs (W1, W2, W3), one on the outer surface of the center of each stack, are shown in FIG.
19 and by winding the winding forming jig in the same direction (for example, clockwise direction) as shown in FIG.
The Tomoe type metal honeycomb body (H ′) shown in FIG. In addition, as shown in FIG. 19, three stacks (S) are formed at the center of the metal honeycomb body (H ′).
1 ', S2', S3 ') are in the shape of a three-sided body, so this type of metal honeycomb body (H' is used in the industry.
) Is commonly called a Tomoe type. Needless to say, the front (cross-section) shape of the S-shaped type and the B-shaped type metal honeycomb body (H ') is not limited to the circular shape shown in the drawing, but may be a racetrack shape or the like. It may have an arbitrary shape.

Then, as shown in FIG. 19, the conventional Tomoe-shaped metal honeycomb body (H ') is packed and fixed in a metal casing (C) to form a metal carrier (MS). .

Hereinafter, the technical constitution and embodiments of the present invention will be described in detail with reference to the drawings. In addition, in the metal carrier (MS) of the present invention described below, the metal honeycomb body (H), which is a main component thereof, is for convenience of description.
However, the present invention is not limited to this.

1 to 3 are views for explaining a metal carrier (MS) according to the first embodiment of the present invention. FIG. 1 is a view corresponding to FIG. 16 relating to a conventional technique, and includes an S-shaped metal honeycomb body (H) according to a first embodiment of the present invention, and a metal casing (which encloses the metal honeycomb body (H) ( It is a front view of the metal carrier (MS) which consists of (C). In FIG. 1, the thick line portion of the metal honeycomb body (H) portion shows an intervening portion of the reinforcing plate (11) described later.

FIG. 2 is a perspective view of the reinforcing plate (11) of the present invention. As shown in the figure, the reinforcing plate (11) is configured so that the area thereof increases from the central portion (a) toward both end portions (b). The reinforcing plate (11) of the present invention is
The stack (S1) used to prepare the S-shaped metal honeycomb body (H) (see FIG.
7)) is an important component applied to. FIG.
FIG. 18 is a perspective view of a partially omitted stack (S1) used for preparing an S-shaped type metal honeycomb body (H) (see FIG. 17 regarding the prior art). That is,
FIG. 3 shows, of the members constituting the stack (S1), one flat strip (1) and one reinforcing plate (11) arranged on the surface of the flat strip (1). Only the combination is shown and the other flat strips (1) and corrugated strips (2) are omitted.

As shown in FIGS. 2 to 3, the stack (S1) (1) includes, as its constituent members, a flat strip (1) and a corrugated strip (2), 2) Reinforcing plate (1
It is characterized in that it is configured using 1). And
The reinforcing plate (11) has an increased surface area when viewed from the central portion (a) of the flat strip (1) to the outer edge portion (the portion that abuts the inner wall surface of the metal casing) (b) (hereinafter, Area-increasing type.) It is composed of a flat reinforcing plate. In the present invention, the "area-increasing type" means
As is apparent from FIG. 3, it goes without saying that this means that the area increases within the width of the flat strip (1).

In the present invention, by adopting the reinforcing plate (11) as a constituent member of the stack (S1),
The following effects can be obtained. (i) In view of the structure of the reinforcing plate (11), the mass of the reinforcing plate per unit length in the direction from the central part to the outer edge part is smaller in the central part than in the outer edge part. It is possible to improve the vibration resistance of the central portion of FIG. (ii) The outer edge portion of the reinforcing plate (11) can be firmly fixed to the inner wall surface of the metal casing (C) to be enveloped. In other words, the outer edge portion of the metal honeycomb body (H) can be firmly fixed to the inner wall surface of the metal casing (C). As a result, it is possible to prevent the two constituent elements (the metal honeycomb body portion and the metal casing portion) from being separated.

(Iii) In relation to the strong fixation of the above-mentioned constituent elements and the structure of the reinforcing plate (11) (the structure in which the area of the outer edge portion is large), the constituent member (flat plate band) of the metal honeycomb body (H) The durability against deformation, buckling, damage, etc. of the material and the corrugated strip material can be improved. (iv) The firm fixing of the outer edge portion (outer edge portion of the metal honeycomb body) of the reinforcing plate (11) to the inner wall surface of the metal casing (C) also gives a preferable result for improving the strength inside the metal honeycomb body (H). .

In the present invention, the reinforcing plate (11) is
It goes without saying that not only one sheet but also a desired number may be applied to the stack (S1). In the present invention, the abutting surface portion of the reinforcing plate (11) and the flat strip (1) may be in a non-fixed state, or at least a part of the abutting surface portion may be mechanically engaged. Alternatively, they may be fixed by a fixing means such as welding or brazing.

In the present invention, the stack (S1
), In other words, the flat plate strip (1), the corrugated strip (2), and the reinforcing plate (11) forming the S-shaped metal honeycomb body (H) have been conventionally used. The metal monolith type honeycomb body (H ′) used in the above may be used. More specifically, chromium steel, or heat-resistant stainless steel obtained by adding rare earth metal (REM) to improve the high temperature oxidation resistance of the steel,
A band material having a thickness of about 0.03 to 0.1 mm may be used. The band material (1, 2) or the reinforcing plate (11) containing Al, or the surface of which is provided with an Al layer is heat-treated, and whisker-shaped or mushroom-shaped alumina (Al It is preferable to deposit ₂ O ₃ ). The whisker-like alumina is P
This is preferable because the washcoat layer for supporting the exhaust gas purifying catalyst such as t, Pd, and Rh can be firmly held.

The S-shaped metal honeycomb body (H) of the present invention is housed and fixed in the metal casing (C) as in the case shown in FIG. 16 and is a metal carrier (MS) for purifying exhaust gas. It is said that. Materials used for manufacturing the metal casing (C) that constitutes the metal carrier (MS) include a strip material (1 and 2) and a reinforcing plate (11) that constitute the metal honeycomb body (H). The same kind of heat resistant steel may be used. Alternatively, a double structure having excellent heat and corrosion resistance, specifically, a double structure metal casing (C) using ferritic stainless steel in the inner part and austenitic stainless steel in the outer part may be used. Good.

On the metal carrier (MS), the catalyst for purifying the exhaust gas may be loaded by a conventional method. That is, on the wall surface of the honeycomb structure of the metal honeycomb body (H),
Γ-Al ₂ having a large surface area capable of forming a wash coat layer as a support layer of an exhaust gas purifying catalyst, and more specifically, having a large catalytic activity.
Form a coating layer of O ₃ , then Pt, Pd, R
It suffices to carry an exhaust gas purifying catalyst such as an h-type redox catalyst.

In the present invention, the shape of the reinforcing plate (11),
Various modifications of the structure are possible. Hereinafter, the reinforcing plate (1
Modifications of 1) will be described with reference to the drawings, but the present invention is not limited to these.

FIG. 4 shows the reinforcing plate (1) shown in FIG.
FIG. 1 is a diagram showing a second embodiment of the reinforcing plate (11), where 1) is the first embodiment. That is, FIG. 4 is a diagram corresponding to FIG. 2 relating to the first embodiment. The reinforcement plate (11) (FIG. 4) of the second embodiment is largely different from that of the first embodiment (FIG. 2) in that both side portions of the reinforcement plate (11) extend from the central portion (a) to the outer edge portion ( This is a point where a desired curvature (R) is obtained over the step b).

FIG. 5 is a view showing a third embodiment of the reinforcing plate (11), and is a view corresponding to FIG. 2 relating to the first embodiment. The reinforcing plate (FIG. 5) of the third embodiment is largely different from that of the first embodiment in that the front face portion of the metal honeycomb body (H) to be manufactured, that is, the exhaust gas flow shown in (F) in the figure. As viewed in the direction, the reinforcing plate (11) is present at the front surface portion into which the exhaust gas flows. By using the auxiliary plate (11) having the structure shown in FIG. 5, constituent strips (flat strip and corrugated strip) observed on the front surface of the S-shaped metal honeycomb body (H).
It effectively prevents the crack growth and damage.

FIG. 6 is a view showing a fourth embodiment of the reinforcing plate (11), which is a modification of the third embodiment. The reinforcing plate (11) (FIG. 6) of the fourth embodiment is greatly different from that of the third embodiment (FIG. 5) in that the edge on the exhaust gas outflow side has a curvature (R). That is the point.

FIG. 7 is a view showing a fifth embodiment of the reinforcing plate (11). FIG. 8 is a diagram showing a sixth embodiment of the reinforcing plate (11). FIG. 7 and FIG.
(Third embodiment) and FIG. 6 (fourth embodiment). The auxiliary plate (11) of the fifth to sixth embodiments (FIGS. 7 to 8) is greatly different from the auxiliary plate (11) of the third to fourth embodiments (FIGS. 5 to 6) in that the manufactured metal honeycomb is manufactured. A reinforcing plate (11) is provided at the rear surface of the body (H), that is, at a portion where the exhaust gas flows out as viewed in the exhaust gas flow direction shown by (F) in the figure.
Is configured to exist. By adopting the reinforcing plate (11) having the above-mentioned structure, telescoping observed at the exhaust gas outflow end portion of this type of metal honeycomb body (H) (a phenomenon in which the central portion of the metal honeycomb body pops out in the exhaust gas flow direction) It is also called scoping, film out, etc.) can be reduced.

9 to 10 are views showing seventh to eighth embodiments of the degree of reinforcement (11) of the present invention, respectively. The auxiliary plate (11) (FIG. 9) of the seventh embodiment can be regarded as a modification of the first embodiment (FIG. 2), and the reinforcing plate (11) (FIG. 10) of the eighth embodiment is the same as the above. It can be regarded as a modification of the fifth embodiment (FIG. 7). A characteristic point of the auxiliary plate (11) of the seventh to eighth embodiments is that the area gradually increases from the central portion (a) to the outer edge portion (b). The reinforcing plate (11) is made of several kinds of rectangular strip materials (e1, e2, e3) having different sizes.
It is composed of. As described above, the reinforcing plate (11) of the present invention is made of the same kind of material as the heat-resistant steel strip material (a flat strip material and a corrugated strip material), but these strip materials are extremely expensive. It is something. Therefore, the reinforcing plate (11) of this embodiment is more economical than that of the other embodiments described above. This is clear from the high yield of rectangular strips from strips.

11 to 13 are views showing an embodiment of the reinforcing plate (11) of the present invention which belongs to still another category. That is, the characteristic point of the reinforcing plate (11) shown in FIG. 11 (the ninth embodiment), FIG. 12 (the tenth embodiment), and FIG. 13 (the eleventh embodiment) is that the reinforcing plate (11) But,
The point is that when viewed from the central portion (a) to the outer edge portion (b), there is a constant area region from the central portion to the region in the vicinity of the outer edge portion, and the area gradually increasing region is connected to it. FIG.
By adopting the reinforcing plate (11) having the structure shown in FIG. 13, a large thermal stress generated in the central part of the metal honeycomb body (H) can be propagated to the outer peripheral part through the reinforcing plate (11). Therefore, the thermal stress can be effectively absorbed and relaxed in the outer peripheral portion. The gradually increasing area shown in the figure has a mode in which the area is increased in one step, or in the present invention, the area is increased in multiple steps or continuously. It goes without saying that it is good.

In the present invention, the stack (S) used when manufacturing the S-shaped or Tomoe-shaped metal honeycomb body (H) has at least one of the stacks used the above-mentioned reinforcing plate. Should be. Needless to say, when the three honeycomb stacks are used to manufacture the honeycomb-shaped metal honeycomb body (H), the reinforcing plate may be applied to one or all of them.

[0047]

The metal carrier (MS) of the present invention mainly comprises an S-shaped type or a tongue-shaped type metal honeycomb body (H). It is characterized in that a stack having a special structure is adopted as a stack used for manufacturing, that is, a stack formed by alternately laminating flat plate-shaped strips and corrugated plate-shaped strips in a desired number of stages.

That is, in the present invention, the stack is
In addition to the flat strips and corrugated strips, the area of the flat strips (or corrugated strips) as seen from the center to the outer edge (the portion that contacts the inner wall surface of the metal casing) It is characterized in that it is an incremental type and is constructed by employing a reinforcing plate which is integrated with the surface of the flat strip.

By adopting the reinforcing plate, the following excellent effects can be obtained. (i) From the above structure of the reinforcing plate, in the mass of the reinforcing plate per unit length from the central part to the outer edge part, the central part is smaller than the outer peripheral part, so that the central part of the metal honeycomb body (H) It is possible to improve the vibration resistance of the portion against an external vibration load. (ii) The outer edge portion of the reinforcing plate can be firmly fixed to the inner wall surface of the metal casing (C) to be enveloped. In other words, the outer edge portion of the metal honeycomb body (H) can be firmly fixed to the inner wall surface of the metal casing (C).
As a result, it is possible to prevent the two constituent elements (the metal honeycomb body portion and the metal casing portion) from being separated.

(Iii) Durability at the outer peripheral portion of the metal honeycomb body (H) and in the vicinity thereof in relation to the strong fixation of the above-mentioned both constituent elements and the structure of the reinforcing plate (structure in which the area of the outer edge portion is large) Is improved. That is, it is possible to improve durability against deformation, buckling, breakage and the like of the constituent members (the flat plate-shaped band member and the corrugated plate-shaped band member) of the metal honeycomb body (H) in these portions. (iv) The firm adhesion of the outer edge portion (outer edge portion of the metal honeycomb body) of the reinforcing plate to the inner wall surface of the metal casing (C) is
It also gives favorable results for improving the strength inside the metal honeycomb body (H).

(V) By using the reinforcing plate, the strength inside the metal honeycomb body (H) can be improved. (vi) Since the flat strip and the corrugated strip are not in contact with each other at the portion where the reinforcing material is present, diffusion and turbulence of the exhaust gas flow at the outer position are promoted, and the purification rate is improved. To do.

[Brief description of drawings]

FIG. 1 is a front view of a metal carrier (MS) having an S-shaped metal honeycomb body (H) of the present invention as a main constituent element.

FIG. 2 is a perspective view of a reinforcing plate of a first embodiment applied to a stack for manufacturing a metal carrier (MS) of the present invention.

FIG. 3 is a perspective view in which a part of a stack used for manufacturing the metal carrier (MS) of the present invention is omitted.

FIG. 4 is a plan view of a reinforcing plate of a second embodiment applied to a stack for manufacturing a metal carrier (MS) of the present invention.

FIG. 5 is a plan view of a reinforcing plate of a third embodiment applied to a stack for producing a metal carrier (MS) of the present invention.

FIG. 6 is a plan view of a reinforcing plate according to a fourth embodiment applied to the stack for manufacturing the metal carrier (MS) of the present invention.

FIG. 7 is a plan view of a reinforcing plate of a fifth embodiment applied to a stack for manufacturing a metal carrier (MS) of the present invention.

FIG. 8 is a plan view of a reinforcing plate of a sixth embodiment applied to a stack for manufacturing a metal carrier (MS) of the present invention.

FIG. 9 is a plan view of a reinforcing plate of a seventh embodiment applied to a stack for manufacturing a metal carrier (MS) of the present invention.

FIG. 10 is a plan view of a reinforcing plate of an eighth embodiment applied to the stack for manufacturing the metal carrier (MS) of the present invention.

FIG. 11 is a plan view of a reinforcing plate of a ninth embodiment applied to a stack for manufacturing a metal carrier (MS) of the present invention.

FIG. 12 is a plan view of a reinforcing plate of a tenth embodiment applied to a stack for manufacturing a metal carrier (MS) of the present invention.

FIG. 13 is a plan view of a reinforcing plate of an eleventh embodiment applied to a stack for manufacturing a metal carrier (MS) of the present invention.

FIG. 14 A conventional winding type metal honeycomb body (H
2] is a perspective view of a metal carrier (MS) including () as a main component.

FIG. 15 is a front view of the metal carrier (MS) shown in FIG.

FIG. 16 is a front view in which a part of a metal carrier (MS) including a conventional S-shaped metal honeycomb body (H ′) as a main component is omitted.

FIG. 17 is a perspective view of a stack (S1 ′) used to manufacture the metal honeycomb body (H ′) of FIG. 16.

FIG. 18 is a diagram illustrating a winding method of the stack (S1 ′) shown in FIG.

[Fig. 19] Conventional Tomoe-shaped metal honeycomb body (H
It is a front view in which a part of a metal carrier (MS) whose main component is') is omitted.

FIG. 20 is a diagram illustrating a method of winding a stack (S1 ′, S2 ′, S3 ′) used to manufacture the metal honeycomb body (H ′) of FIG.

[Explanation of symbols]

 MS: Metal carrier H: Metal honeycomb body of the present invention H ': Conventional metal honeycomb body C: Metal casing S1: Stack of the present invention S1', S2 ', S3'. … Conventional stack W1, W2 ……… Roll forming jig F ……… Exhaust gas flow direction 1 ……… Flat plate strip 2 ……… Corrugated strip 3 ……… Cell (mesh-like mesh) Stairway) 11 ………… Reinforcement plate a ………… Center part b ………… Outer edge part

Claims (5)

[Claims] 1. A desired number of stacks (S = S1 to Sn, n is an integer of 1 or more) formed by alternately stacking thin metal flat plate strips and corrugated strip strips in a desired number of stages are used. A structure in which the stack is integrally wound around the substantially central portion of each stack, and the end portions of the flat plate-shaped strips and corrugated strip-shaped strips of each stack contact the inner wall surface of the outer metal casing. A metal carrier comprising an S-shaped type or a B-shaped type metal honeycomb body for supporting the exhaust gas purifying catalyst, and a metal casing enclosing the metal honeycomb body, wherein at least a desired number of the stacks One stack (S) includes (i) the flat strip and the corrugated strip, and (ii) the central portion of the flat strip to the outer edge (the portion that abuts the inner wall surface of the metal casing). ), The area increase type, and A metal carrier, characterized in that it is constructed by using a reinforcing plate integrated on the surface of a flat strip. 2. The metal carrier according to claim 1, wherein the reinforcing plate has a gradual increase in area when viewed from the central portion of the flat strip toward the outer edge. 3. The metal carrier according to claim 2, wherein the reinforcing plate is of a type whose area is continuously increased. 4. The metal carrier according to claim 2, wherein the reinforcing plate is of a type in which the area is gradually increased. 5. The metal carrier according to claim 1, wherein the reinforcing plate has a gradually increasing area after the area having a constant area as viewed from the center to the outer edge of the flat strip.