JP6316038B2

JP6316038B2 - Heat shield plate

Info

Publication number: JP6316038B2
Application number: JP2014053921A
Authority: JP
Inventors: 貴久水上; 直矢山岸
Original assignee: Nichias Corp
Current assignee: Nichias Corp
Priority date: 2014-03-17
Filing date: 2014-03-17
Publication date: 2018-04-25
Anticipated expiration: 2034-03-17
Also published as: JP2015175327A

Description

本発明は、例えば、エンジンから排出され、エキゾーストマニホールドを通過した排気ガス、或いはターボチャージャーを構成するタービンを通過した排気ガスを、触媒及びマフラーに導く為の排気管等の様に、運転時に高温となる部分を覆う状態で設置する遮熱板の改良に関する。 The present invention provides a high temperature during operation, such as an exhaust pipe for guiding exhaust gas discharged from an engine and passing through an exhaust manifold or passing through a turbine constituting a turbocharger to a catalyst and a muffler. The present invention relates to an improvement of a heat shield installed in a state of covering a portion to be.

自動車用エンジンのシリンダヘッドの側面にその上流端部を接続したエキゾーストマニホールドを通過した排気ガスを、下流側に配置された触媒及びマフラーに導く為の排気管等の部材の温度は、内部を流れる排気の熱により、相当に上昇する。この様に温度上昇した前記排気管から放射される輻射熱から、エンジンルーム内に設けた他の機器等を保護する為に、前記排気管をヒートインシュレータと呼ばれる遮熱板により覆い、この排気管からの輻射熱が前記他の機器等に伝わるのを防止している。エンジンに過給する為のターボチャージャーに関しても同様である。 The temperature of a member such as an exhaust pipe that guides exhaust gas that has passed through an exhaust manifold having an upstream end connected to a side surface of a cylinder head of an automobile engine to a catalyst and a muffler disposed on the downstream side flows inside. The temperature rises considerably due to the heat of the exhaust. In order to protect other equipment and the like provided in the engine room from radiant heat radiated from the exhaust pipe whose temperature has increased in this way, the exhaust pipe is covered with a heat shield plate called a heat insulator, Is prevented from being transmitted to the other devices. The same applies to the turbocharger for supercharging the engine.

図４〜６は、特許文献１に記載された遮熱板１の従来構造の１例を示している。この遮熱板１は、全体が筒状に形成されており、上流側に配置されたエンジン（図示省略）からの排気ガスを、下流側に配置された触媒及びマフラー（図示省略）に導く為の排気管２の外周面の一部を覆う状態で設けられるものである。この様な遮熱板１は、１対の半円筒状の遮熱板素子３ａ、３ｂから成る。これら両遮熱板素子３ａ、３ｂは、半円筒状の金属板４ａ、４ｂと、これら各金属板４ａ、４ｂの内面（組み付け状態で、排気管２に近い面）に、その外面（組み付け状態で、排気管２から遠い面）が当接した状態で設けられる半円筒状の断熱材５ａ、５ｂとから成る。 4 to 6 show an example of the conventional structure of the heat shield plate 1 described in Patent Document 1. FIG. The heat shield plate 1 is formed in a cylindrical shape as a whole, and guides exhaust gas from an engine (not shown) arranged on the upstream side to a catalyst and a muffler (not shown) arranged on the downstream side. The exhaust pipe 2 is provided so as to cover a part of the outer peripheral surface of the exhaust pipe 2. Such a heat shield plate 1 is composed of a pair of semi-cylindrical heat shield plate elements 3a and 3b. These heat shield plate elements 3a and 3b are semi-cylindrical metal plates 4a and 4b, and inner surfaces (surfaces close to the exhaust pipe 2 in the assembled state) of the metal plates 4a and 4b. And a semi-cylindrical heat insulating material 5a, 5b provided in a state in which the surface far from the exhaust pipe 2 is in contact.

このうちの各金属板４ａ、４ｂは、鋼板やアルミニウム板の単板、或いは積層板をプレス加工する事により、その内側に前記各断熱材５ａ、５ｂを配置できる程度の隙間を介在させた状態で前記排気管２を覆える様な形状及び大きさに形成されている。又、前記各金属板４ａ、４ｂの円周方向両端部には、軸方向の全長に亙り、径方向外方に延出した状態で、取付フランジ部６ａ、６ｂが形成されている。又、これら各取付フランジ部６ａ、６ｂには、軸方向に離隔した状態で、複数個の貫通孔７、７が形成されている。 Each of the metal plates 4a and 4b is formed by pressing a single plate or a laminated plate of a steel plate or an aluminum plate so that a gap enough to arrange the heat insulating materials 5a and 5b is interposed inside the metal plates 4a and 4b. The shape and size of the exhaust pipe 2 are covered. In addition, mounting flange portions 6a and 6b are formed at both ends in the circumferential direction of the metal plates 4a and 4b so as to extend radially outward over the entire length in the axial direction. Each of the mounting flange portions 6a and 6b is formed with a plurality of through holes 7 and 7 spaced apart in the axial direction.

又、前記各断熱材５ａ、５ｂは、フェノール樹脂、エポキシ樹脂、或はこれらを主成分とし、ガラス繊維、セラミック繊維類を混入したもの等により、その内側に、前記排気管２を隙間のない状態で覆える様な形状及び大きさに形成されている。
上述の様な両遮熱板素子３ａ、３ｂは、前記排気管２を覆う様に、前記各金属板４ａ、４ｂの各取付フランジ部６ａ、６ｂ同士を円周方向に対向させた状態で、これら各取付フランジ部６ａ、６ｂの各貫通孔７、７に挿通したボルト８、８と、これら各ボルト８、８の先端部に螺合したナット９、９により結合固定されている。 Further, each of the heat insulating materials 5a and 5b is made of phenol resin, epoxy resin, or a material containing these as main components and mixed with glass fiber or ceramic fiber. It is formed in a shape and size that can be covered in a state.
Both the heat shield plate elements 3a and 3b as described above have the mounting flange portions 6a and 6b of the metal plates 4a and 4b facing each other in the circumferential direction so as to cover the exhaust pipe 2. The bolts 8 and 8 inserted through the through holes 7 and 7 of the mounting flange portions 6a and 6b and the nuts 9 and 9 screwed to the tip portions of the bolts 8 and 8 are coupled and fixed.

ところで、上述の様な構成を有する遮熱板１を自動車メーカ等に納品する場合、前記各金属板４ａ、４ｂと各断熱材５ａ、５ｂとを、別体として納品するか、或いは、これら各金属板４ａ、４ｂの内側に前記各断熱材５ａ、５ｂを配置した状態（組み合わせた状態）で納品している。何れの納品方法の場合でも、前記各金属板４ａ、４ｂの内側に前記各断熱材５ａ、５ｂを配置した状態で、これら各金属板４ａ、４ｂと各断熱材５ａ、５ｂとが、結合されていない為、前記排気管２に組み付ける際、前記各断熱材５ａ、５ｂが、前記各金属板４ａ、４ｂに対してずれたり、或いはこれら各金属板４ａ、４ｂから落下する等して、組み付け作業の効率が低下してしまう可能性がある。これに対して、例えば前記断熱材５ａ、５ｂを、前記各金属板４ａ、４ｂに対し、接着材により結合する事も考えられるが、この場合には、結合するまで（接着剤が乾くまで）に要する時間が長くなると共に、接着剤自体のコストが嵩み、好ましくない。 By the way, when the heat shield plate 1 having the above-described configuration is delivered to an automobile manufacturer or the like, the metal plates 4a and 4b and the heat insulating materials 5a and 5b are delivered separately or these It is delivered in a state (combined state) in which the heat insulating materials 5a and 5b are arranged inside the metal plates 4a and 4b. In any delivery method, the metal plates 4a, 4b and the heat insulating materials 5a, 5b are combined with the heat insulating materials 5a, 5b arranged inside the metal plates 4a, 4b. Therefore, when assembling to the exhaust pipe 2, the heat insulating materials 5a and 5b are displaced from the metal plates 4a and 4b or dropped from the metal plates 4a and 4b. There is a possibility that work efficiency may be reduced. On the other hand, for example, the heat insulating materials 5a and 5b may be bonded to the metal plates 4a and 4b with an adhesive. In this case, until the bonding is performed (until the adhesive is dried). It takes a long time to complete the process and increases the cost of the adhesive itself, which is not preferable.

又、上述の様に、前記各金属板４ａ、４ｂと前記各断熱材５ａ、５ｂとを別体として納品する場合には、輸送コスト及び部品管理コストが嵩んでしまう。一方、前記各金属板４ａ、４ｂの内側に前記各断熱材５ａ、５ｂを組み合わせた状態で納品する場合でも、梱包の際、これら両部材４ａ（４ｂ）、５ａ（５ｂ）同士が分離しない様に注意を払いながら行う必要があり、作業効率が低下してしまう。何れにしても、納品の為のコスト（納品コスト）が嵩んでしまう可能性がある。 Further, as described above, when the metal plates 4a and 4b and the heat insulating materials 5a and 5b are delivered separately, the transportation cost and the parts management cost increase. On the other hand, even when the heat insulating materials 5a and 5b are combined and delivered inside the metal plates 4a and 4b, the two members 4a (4b) and 5a (5b) are not separated from each other during packaging. It is necessary to pay attention to this, and work efficiency will be reduced. In any case, the cost for delivery (delivery cost) may increase.

特開平９−３２５４６号公報JP-A-9-32546

本発明は、上述の様な事情に鑑みて、納品コストの低減及び組み付け性の向上を図れる、遮熱板の構造を実現すべく発明したものである。 The present invention has been invented to realize a structure of a heat shield plate capable of reducing the delivery cost and improving the assemblability in view of the above-described circumstances.

本発明の遮熱板は、プレス加工により使用時に高温となる部材の少なくとも一部を覆える形状に形成された部分筒状（例えば半筒状）の金属板と、この金属板の内側（組み付け状態で、高温となる部材に近い側）に、この金属板と当接した状態で配置されており、その内面が前記高温となる部材の外面に当接した状態（好ましくは押し付けられた状態）で使用されるものである部分筒状の断熱材と、１対の打ち抜き部を有するステープルとを備えている。
又、前記金属板と前記断熱材とが、これら金属板及び断熱材を外側（組み付け状態で、高温となる部材から遠い側）から打ち抜いた状態で固定された前記ステープルにより、互いに結合されている。
更に、前記金属板の外面のうち、前記ステープルを打ち抜く部分に、底部が平坦面状の凹部が設けられており、前記底部が前記１対の打ち抜き部同士の距離よりも大きくなっている。 The heat shield plate of the present invention includes a partially cylindrical (for example, semi-cylindrical) metal plate formed in a shape that covers at least a part of a member that becomes hot during use by press working, and an inner side (assembly ) of the metal plate. In a state close to the high temperature member) in contact with the metal plate, and the inner surface is in contact with the outer surface of the high temperature member (preferably pressed) those with part cylindrical insulation material is used in, and a staple having a punched portion of the pair.
Further, the metal plate and the heat insulating material are coupled to each other by the staple fixed in a state in which the metal plate and the heat insulating material are punched from the outside (the side far from the high temperature member in the assembled state) . .
Furthermore, a concave portion having a flat bottom surface is provided in a portion of the outer surface of the metal plate where the staple is punched, and the bottom portion is larger than the distance between the pair of punched portions.

上述の様な本発明の遮熱板を実施する場合には例えば、請求項２に記載した発明の様に、前記底部の厚さ寸法を、他の部分の厚さ寸法よりも小さくする事ができる。
本発明を実施する場合には例えば、請求項３に記載した発明の様に、前記凹部を円形とし、前記底部の直径を前記１対の打ち抜き部同士の距離よりも大きくする事ができる。
本発明を実施する場合には例えば、請求項４に記載した発明の様に、前記遮熱板を、半筒状（例えば、半円筒状）の一対の遮熱板素子により構成する。又、これら両遮熱板素子を、１対の半筒状の金属板と、１対の半筒状の断熱材とにより構成する。そして、これら両金属板を、これら両金属板の円周方向両端部を対向させた状態で結合する事により、全体を筒状に形成する。尚、前記遮熱板を、部分筒状の複数（３個以上）の遮熱板素子（金属板及び断熱材）により構成する事も可能である。
請求項４に記載された発明を実施する場合には例えば、請求項５に記載した発明の様に、前記各金属板の円周方向両端部に、径方向外方に延出した状態で取付フランジ部を形成する。そして、前記各金属板のこれら各取付フランジ部同士を円周方向に対向させた状態で、これら各取付フランジ部同士を溶接又はかしめにより結合固定する。 When implementing the heat shield plate of the present invention as described above, for example, as in the invention described in claim 2, the thickness dimension of the bottom portion may be made smaller than the thickness dimension of other portions. I can .
In the case of carrying out the present invention, for example, as in the invention described in claim 3, the concave portion can be circular, and the diameter of the bottom portion can be made larger than the distance between the pair of punched portions .
In the case of carrying out the present invention, for example, as in the invention described in claim 4, the heat shield plate is constituted by a pair of heat shield plate elements having a semi-cylindrical shape (for example, a semi-cylindrical shape). Further, both the heat shield plate elements are constituted by a pair of semi-cylindrical metal plates and a pair of semi-cylindrical heat insulating materials. Then, these two metal plates are joined together in a state where both ends in the circumferential direction of these two metal plates are opposed to each other, so that the whole is formed into a cylindrical shape. The heat shield plate may be constituted by a plurality of (three or more) heat shield plate elements (metal plate and heat insulating material) that are partially cylindrical.
When the invention described in claim 4 is carried out, for example, as in the invention described in claim 5, it is attached to both ends in the circumferential direction of each metal plate in a state of extending radially outward. Form a flange. Then, in a state where the mounting flange portions of the metal plates are opposed to each other in the circumferential direction, the mounting flange portions are coupled and fixed by welding or caulking.

本発明の遮熱板の場合、遮熱板を構成する金属板と断熱材とを、この金属板を外側から打ち抜く事により固定されたステープルにより互いに結合している。この為、これら金属板と断熱材とを分離不能に結合した状態で、自動車メーカ等に納品する為の梱包及び輸送を行う事ができる。この結果、遮熱板の納品コストの低減を図れる。又、接着剤を使用して結合する場合に比べて、結合作業に要する時間を短くできると共に、材料コストを抑える事もできる。
又、前記遮熱板を、排気管等の使用時に高温となる部材に対して組み付ける際、前記金属板と前記断熱材とが分離する事がない。この為、遮熱板の組み付け性を向上でき、組み立て作業効率の向上を図れる。 In the case of the heat shield plate of the present invention, the metal plate and the heat insulating material constituting the heat shield plate are joined to each other by staples fixed by punching the metal plate from the outside. For this reason, it is possible to carry out packaging and transportation for delivery to an automobile manufacturer or the like in a state where the metal plate and the heat insulating material are inseparably coupled. As a result, the delivery cost of the heat shield can be reduced. In addition, the time required for the joining work can be shortened and the material cost can be reduced as compared with the case of joining using an adhesive.
Further, when the heat shield plate is assembled to a member that becomes high temperature when an exhaust pipe or the like is used, the metal plate and the heat insulating material are not separated. For this reason, the assembly | attachment property of a heat shield board can be improved and the improvement of assembly work efficiency can be aimed at.

本発明の実施の形態の１例を示す、遮熱板を構成する１対の遮熱板素子を、分離した状態で示す斜視図。The perspective view which shows one example of embodiment of this invention, and shows a pair of heat shield board element which comprises the heat shield, in the isolate | separated state. 同じく、図１のＢ−Ｂ断面図。Similarly, BB sectional drawing of FIG. 同じく、金属板を打ち抜く前の状態のステープルを示す正面図（ａ）と、図１のＣ−Ｃ断面図（ｂ）。Similarly, the front view (a) which shows the staple of the state before punching a metal plate, and CC sectional drawing (b) of FIG. 従来から知られている遮熱板の１例を、排気管に組み付けた状態で示す図。The figure which shows one example of the heat shield conventionally known in the state assembled | attached to the exhaust pipe. 同じく、図４のＡ−Ａ断面図。Similarly, AA sectional view of FIG. 同じく、遮熱板を排気管に組み付ける前の状態を説明する為の図４の分解斜視図。Similarly, the exploded perspective view of FIG. 4 for demonstrating the state before attaching a heat shield to an exhaust pipe.

［実施の形態の１例］
本発明の実施の形態の第１例に就いて、図１〜３を参照しつつ説明する。
本例の遮熱板１ａは、前述した従来構造と同様に、上流側に配置されたエンジンから排出され、エキゾーストマニホールドを通過した排気ガス、或いはターボチャージャーを構成するタービンを通過した排気ガスを、下流側に配置された触媒及びマフラーに導く為の排気管２（図４〜６参照）等の様に、運転時に高温となる部分を覆う状態で設置されるものである。 [Example of Embodiment]
A first example of the embodiment of the present invention will be described with reference to FIGS.
As in the conventional structure described above, the heat shield plate 1a of the present example is exhausted from an engine disposed on the upstream side and passed through an exhaust manifold or exhaust gas passed through a turbine constituting a turbocharger. Like the exhaust pipe 2 (see FIGS. 4 to 6) and the like arranged for the catalyst and the muffler arranged on the downstream side, it is installed so as to cover a portion that becomes hot during operation.

この様な本例の遮熱板１ａは、１対の半円筒状の遮熱板素子３ｃ、３ｄから成る。又、これら両遮熱板素子３ｃ、３ｄは、半円筒状の金属板４ｃ、４ｄと、これら各金属板４ｃ、４ｄの内側（組み付け状態で排気管２に近い側）に、その外面（組み付け状態で排気管２から遠い面）が前記各金属板４ｃ、４ｄの内面と当接した状態で配置された半円筒状の断熱材５ｃ、５ｄと、複数個（本例の場合２個）のステープル１０、１０とから成る。 Such a heat shield plate 1a of this example includes a pair of semi-cylindrical heat shield plate elements 3c and 3d. The heat shield plate elements 3c, 3d are semi-cylindrical metal plates 4c, 4d and the outer surfaces (assembly) of the metal plates 4c, 4d (the side close to the exhaust pipe 2 in the assembled state). A plurality of (two in this case) semi-cylindrical heat insulating materials 5c and 5d arranged in a state where the surface far from the exhaust pipe 2 is in contact with the inner surface of each of the metal plates 4c and 4d. And staples 10 and 10.

このうちの各金属板４ｃ、４ｄは、厚さ寸法が０．１５〜０．３ｍｍの鋼板やアルミニウム板の単板をプレス加工する事により、その内側に前記各断熱材５ｃ、５ｄを配置できる程度の隙間を介在させた状態で、前記排気管２を覆える様な形状及び大きさに形成されている。尚、前記各金属板４ｃ、４ｄを、アルミニウム板により造る場合には、厚さ寸法を０．３ｍｍ程度にするのが好ましい。一方、前記各金属板４ｃ、４ｄを、ＳＵＳ４３０等のフェライト系ステンレス鋼板により造る場合には、厚さ寸法を０．２ｍｍ程度にするのが好ましい。 Each of the metal plates 4c and 4d can be arranged with the heat insulating materials 5c and 5d on the inner side by pressing a steel plate or aluminum plate having a thickness of 0.15 to 0.3 mm. It is formed in a shape and size so as to cover the exhaust pipe 2 with a gap of a certain degree interposed. In addition, when making each said metal plate 4c, 4d with an aluminum plate, it is preferable to make thickness dimension into about 0.3 mm. On the other hand, when the metal plates 4c and 4d are made of a ferritic stainless steel plate such as SUS430, the thickness is preferably about 0.2 mm.

この様な各金属板４ｃ、４ｄの材料及び厚さ寸法は、後述するステープル１０、１０を打ち抜く事が可能な範囲で、適宜設定する事ができる。或いは、これら各ステープル１０、１０を打ち抜く部分の厚さ寸法を、他の部分に比べて予め小さくしておくこともできる。具体的には、前記各ステープル１０、１０を打ち抜く部分の周囲に、例えば、プレス加工により円形の凹部（図示省略）を形成し、当該部分の厚さを、他の部分の厚さ寸法よりも小さくする。この様な凹部を形成すれば、前記各ステープル１０、１０の打ち抜きが容易に行えるだけでなく、これら各ステープル１０、１０を打ち抜く位置の確認を容易に行う事もできる。尚、前記各金属板４ｃ、４ｄに前記凹部を形成した場合に、この凹部の底部の厚さ寸法を他の部分の厚さ寸法と同じに形成したとしても、前記各ステープル１０、１０を打ち抜く位置の確認を容易に行えると言った効果を得る事ができる。 The material and thickness dimension of each of the metal plates 4c and 4d can be set as appropriate as long as staples 10 and 10 described later can be punched out. Or the thickness dimension of the part which pierces these staples 10 and 10 can also be made small previously compared with another part. Specifically, for example, a circular concave portion (not shown) is formed around the portion where the staples 10 and 10 are punched out by pressing, and the thickness of the portion is larger than the thickness dimension of the other portions. Make it smaller. If such a concave portion is formed, not only the staples 10 and 10 can be easily punched out, but also the positions where the staples 10 and 10 are punched out can be easily confirmed. When the recesses are formed in the metal plates 4c and 4d, the staples 10 and 10 are punched out even if the thickness of the bottom of the recesses is the same as the thickness of other portions. The effect that the position can be easily confirmed can be obtained.

又、前記各金属板４ｃ、４ｄの円周方向両端部には、軸方向の全長に亙り、径方向外方に延出した状態で、取付フランジ部６ｃ、６ｄが形成されている。尚、本例の場合、これら各取付フランジ部６ｃ、６ｄに、前述した従来構造の様な貫通孔７、７（図４〜６）は
形成していない。 Further, mounting flange portions 6c and 6d are formed at both ends in the circumferential direction of the respective metal plates 4c and 4d so as to extend radially outward over the entire length in the axial direction. In the case of this example, the through-holes 7 and 7 (FIGS. 4 to 6) as in the conventional structure described above are not formed in the mounting flange portions 6c and 6d.

又、前記各断熱材５ｃ、５ｄは、フェノール樹脂、エポキシ樹脂、或はこれらを主成分とし、ガラス繊維、セラミック繊維類を混入したもの等により、その内側に、前記排気管２を隙間のない状態で覆える様な形状及び大きさに形成されている。一般的に、前記各断熱材５ａ、５ｂの厚さ寸法は、前記各金属板４ｃ、４ｄの厚さ寸法よりも十分に大きい。
前記各断熱材５ａ、５ｂの厚さ寸法Ｗ（図示省略）は、前記各金属板４ｃ、４ｄ同士を結合した状態での内径寸法Ｄ_１（図示省略）と、前記排気管２の外径寸法Ｄ_２（図示省略）との差の１／２よりも、大きくするのが好ましい｛Ｗ＞（Ｄ_１−Ｄ_２）／２｝。この様な寸法関係に規制する事により、組み付け状態に於いて、前記各金属板４ｃ、４ｄの内面と、前記排気管２の外周面との間に、前記各断熱材５ａ、５ｂを、圧縮した状態（弾性力を有した状態）で配置できる。 Further, each of the heat insulating materials 5c and 5d is made of phenol resin, epoxy resin, or a material containing these as a main component and mixed with glass fiber or ceramic fiber. It is formed in a shape and size that can be covered in a state. Generally, the thickness dimension of each said heat insulating material 5a, 5b is sufficiently larger than the thickness dimension of each said metal plate 4c, 4d.
A thickness dimension W (not shown) of each of the heat insulating materials 5a and 5b is an inner diameter dimension D ₁ (not shown) in a state where the metal plates 4c and 4d are coupled to each other, and an outer diameter dimension of the exhaust pipe 2. It is preferable to make it larger than 1/2 of the difference from D ₂ (not shown) {W> (D ₁ -D ₂ ) / 2}. By restricting to such a dimensional relationship, the heat insulating materials 5a and 5b are compressed between the inner surfaces of the metal plates 4c and 4d and the outer peripheral surface of the exhaust pipe 2 in the assembled state. It can arrange | position in the state (state which had elastic force).

又、前記各ステープル１０、１０は、鉄系合金、アルミニウム合金、又はステンレス鋼等の金属材料から造られたもので、前記各金属板４ｃ、４ｄと前記各断熱材５ｃ、５ｄとを互いに結合する為のものである。具体的には、前記各ステープル１０、１０は、前記各金属板４ｃ、４ｄと各断熱材５ｃ、５ｄとを、これら各金属板４ｃ、４ｄの円周方向中間部で、軸方向に離隔した複数箇所（本例の場合２箇所）を、外面側から打ち抜いた状態で結合している。又、本例の場合には、前記各ステープル１０、１０（連続部１２）の長さ方向を、前記各遮熱板素子３ｃ、３ｄの軸方向に一致させた状態（外周面の母線形状に沿った状態）で、前記各ステープル１０、１０を打ち抜いている。この様にして、これら各ステープル１０、１０と前記各金属板４ｃ、４ｄの外面との間に隙間が形成される事を防止している。尚、前述した様に、前記各金属板４ｃ、４ｄの外面のうち、ステープル１０、１０を打ち付ける部分に、凹部を形成すると共に、この凹部の底部を平坦面状に形成すれば、前記各ステープル１０、１０（連続部１２）の長さ方向を、特に規制しなくても（遮熱板素子３ｃ、３ｄの軸方向に一致させなくても）、これら各ステープル１０、１０と前記各金属板４ｃ、４ｄの外面との間に隙間が形成される事を防止できる。 The staples 10 and 10 are made of a metal material such as an iron alloy, an aluminum alloy, or stainless steel, and the metal plates 4c and 4d and the heat insulating materials 5c and 5d are coupled to each other. It is for doing. Specifically, the staples 10 and 10 are configured such that the metal plates 4c and 4d and the heat insulating materials 5c and 5d are axially separated from each other in the circumferential middle portion of the metal plates 4c and 4d. A plurality of locations (two locations in this example) are joined in a state of being punched from the outer surface side. In the case of this example, the length direction of the staples 10 and 10 (continuous portion 12) is aligned with the axial direction of the heat shield plate elements 3c and 3d (in the shape of the generatrix of the outer peripheral surface). The staples 10 and 10 are punched out in a state of being aligned. In this way, a gap is prevented from being formed between the staples 10 and 10 and the outer surfaces of the metal plates 4c and 4d. In addition, as described above, if the concave portion is formed in the outer surface of each of the metal plates 4c and 4d in the portion where the staples 10 and 10 are hit, and the bottom of the concave portion is formed in a flat surface shape, the respective staples are formed. The staples 10 and 10 and the metal plates are not restricted even if the length directions of the ten and ten (continuous portions 12) are particularly restricted (even if they do not coincide with the axial direction of the heat shield plate elements 3c and 3d). It is possible to prevent a gap from being formed between the outer surfaces of 4c and 4d.

この様な各ステープル１０、１０は、打ち付け前の状態では、図３（ａ）に示す様に、全体をコ字状に形成されており、１対の打ち抜き部１１、１１と、これら両打ち抜き部１１、１１の基端部同士を連結する連続部１２とから成る。一方、前記各ステープル１０、１０は、打ち付け状態では、前記両打ち抜き部１１、１１の中間部から先端部に掛けての部分が、これら両打ち抜き部１１、１１同士が互いに近づく方向に、半円弧状に折れ曲がっている。但し、打ち付け状態での前記両打ち抜き部１１、１１の形状は、後述するダイスの形状に応じて変化する為、半円弧状に限らず、例えば直角に折れ曲がった形状も採用できる。前記打ち抜き部１１、１１及び前記連続部１２の形状は、本例の場合に限定されず、各種形状のものを採用できる。 Each of the staples 10 and 10 is formed in a U shape as a whole as shown in FIG. 3 (a) in a state before being driven, and a pair of punched portions 11 and 11 and both the punched portions are formed. It consists of the continuous part 12 which connects the base end parts of the parts 11 and 11. FIG. On the other hand, when the staples 10 and 10 are in the hammered state, the portion from the intermediate part of the punched parts 11 and 11 to the tip part is semicircular in the direction in which the punched parts 11 and 11 approach each other. It is bent in an arc. However, since the shape of the both punched portions 11 and 11 in the struck state changes according to the shape of a die to be described later, the shape is not limited to a semicircular arc shape, and for example, a shape bent at a right angle can also be adopted. The shapes of the punched portions 11 and 11 and the continuous portion 12 are not limited to the case of this example, and various shapes can be adopted.

尚、上述の様な各ステープル１０、１０の打ち付けは以下の様にして行う。
先ず、前記各金属板４ｃ、４ｄの内側に前記各断熱材５ｃ、５ｄを配置した状態で、これら各断熱材５ｃ、５ｄの内側に、図示しないダイスを配置する。そして、この状態で、図示しないエアカッター等の打ち付け工具により、前記各ステープル１０、１０を、前記各金属板４ｃ、４ｄの外面側から打ち付けて、これら各金属板４ｃ、４ｄ及び各断熱材５ｃ、５ｄを同時に打ち抜く。すると、前記各ステープル１０、１０の先端部から中間部に掛けての部分が、前記ダイスに形成された凹溝に沿う様にして、互いに近付く方向に湾曲しながら折れ曲がる。尚、前記各ステープル１０、１０により、前記各金属板４ｃ、４ｄと前記各断熱材５ｃ、５ｄとを互いに結合する作業は、前記両遮熱板素子３ｃ、３ｄを自動車メーカ等に納品する前の段階で行う。即ち、納品の為の梱包及び輸送は、前記各ステープル１０、１０により、前記各金属板４ｃ、４ｄと前記各断熱材５ｃ、５ｄとを互いに結合した状態で行う事ができる。 The staples 10 and 10 as described above are driven as follows.
First, in a state where the heat insulating materials 5c and 5d are arranged inside the metal plates 4c and 4d, dies (not shown) are arranged inside the heat insulating materials 5c and 5d. Then, in this state, the staples 10 and 10 are driven from the outer surface side of the metal plates 4c and 4d by a driving tool such as an air cutter (not shown), and the metal plates 4c and 4d and the heat insulating material 5c. 5d is punched at the same time. As a result, the portions of the staples 10 and 10 that are hung from the leading end portion to the intermediate portion bend while curving in a direction approaching each other along the concave groove formed in the die. The operation of joining the metal plates 4c, 4d and the heat insulating materials 5c, 5d with the staples 10, 10 is performed before the heat shield plate elements 3c, 3d are delivered to an automobile manufacturer or the like. At the stage. That is, packing and transportation for delivery can be performed in a state where the metal plates 4c and 4d and the heat insulating materials 5c and 5d are coupled to each other by the staples 10 and 10, respectively.

上述の様な構成を有する本例の遮熱板１ａ（両遮熱板素子３ｃ、３ｄ）を、前記排気管２に組み付ける作業に就いて説明する。
先ず、前記両遮熱板素子３ｃ、３ｄを、これら両遮熱板素子３ｃ、３ｄを構成する各金属板４ｃ、４ｄの取付フランジ部６ｃ、６ｃ（６ｄ、６ｄ）同士を円周方向に対向させ、前記各断熱材５ｃ、５ｄを前記排気管２の外周面に押し付けた状態で、この排気管２を覆う様に配置する。そして、円周方向に対向した前記各取付フランジ部６ｃ、６ｃ（６ｄ、６ｄ）同士を、スポット溶接により結合固定する。 The operation of assembling the heat shield plate 1a (both heat shield plate elements 3c and 3d) of this example having the above-described configuration to the exhaust pipe 2 will be described.
First, the heat shield plate elements 3c and 3d are opposed to each other in the circumferential direction between the mounting flange portions 6c and 6c (6d and 6d) of the metal plates 4c and 4d constituting the heat shield plate elements 3c and 3d. In the state where the heat insulating materials 5c and 5d are pressed against the outer peripheral surface of the exhaust pipe 2, they are arranged so as to cover the exhaust pipe 2. Then, the mounting flange portions 6c and 6c (6d and 6d) facing each other in the circumferential direction are coupled and fixed by spot welding.

尚、スポット溶接の代わりにこれら各取付フランジ部６ｃ、６ｃ（６ｄ、６ｄ）同士をかしめ固定により結合固定する事もできる。具体的には、前記各金属板４ｃ、４ｄの取付フランジ部６ｃ、６ｃ（６ｄ、６ｄ）同士を円周方向に対向させた状態で、これら両取付フランジ部６ｃ、６ｃ（６ｄ、６ｄ）の径方向外端寄り部分の一部又は全部を、同時に１８０°折り曲げる様にして行う。或いは、前記両遮熱板素子３ｃ、３ｄのうちの何れか一方の遮熱板素子３ｃを構成する金属板４ｃの各取付フランジ部６ｃ、６ｃの径方向に関する高さ寸法を、他方の遮熱板素子３ｄを構成する金属板４ｄの各取付フランジ部６ｄ、６ｄの径方向に関する高さ寸法よりも大きく形成すると共に、前記一方の遮熱板素子３ｃの各取付フランジ部６ｃ、６ｃを、他方の遮熱板素子３ｄの各取付フランジ部６ｄ、６ｄ側に、これら各取付フランジ部６ｄ、６ｄを覆う様な状態で１８０°折り曲げて（かしめて）固定する事もできる。 Instead of spot welding, these mounting flange portions 6c, 6c (6d, 6d) can be coupled and fixed by caulking. Specifically, the mounting flange portions 6c, 6c (6d, 6d) of the metal plates 4c, 4d are opposed to each other in the circumferential direction, and the mounting flange portions 6c, 6c (6d, 6d) of both the metal plates 4c, 4d are opposed to each other in the circumferential direction. A part or all of the portion near the outer end in the radial direction is bent 180 ° at the same time. Alternatively, the height dimension in the radial direction of each of the mounting flange portions 6c and 6c of the metal plate 4c constituting either one of the heat shield plate elements 3c and 3d is set to the other heat shield plate. Each of the mounting flange portions 6c, 6c of the one heat shield plate element 3c is formed larger than the height dimension in the radial direction of each mounting flange portion 6d, 6d of the metal plate 4d constituting the plate element 3d. The heat shield plate element 3d can be fixed to the side of the mounting flanges 6d and 6d by bending (caulking) 180 ° so as to cover the mounting flanges 6d and 6d.

本例の場合、前記遮熱板１ａ（両遮熱板素子３ｃ、３ｄ）を前記排気管２に組み付けた状態で、前記各金属板４ｃ、４ｄの内面と、前記各断熱材５ｃ、５ｄの外面とが当接し、且つ、これら各断熱材５ｃ、５ｄの内面と、前記排気管２の外面とが当接している。この様にして、前記遮熱板１ａが、前記排気管２に対してがたつく事を防止している。 In the case of this example, with the heat shield plate 1a (both heat shield plate elements 3c, 3d) assembled to the exhaust pipe 2, the inner surfaces of the metal plates 4c, 4d and the heat insulating materials 5c, 5d The outer surface is in contact with each other, and the inner surfaces of these heat insulating materials 5c and 5d and the outer surface of the exhaust pipe 2 are in contact with each other. In this way, the heat shield plate 1a prevents the exhaust pipe 2 from rattling.

上述の様な構成を有する本例の遮熱板１ａの場合、この遮熱板１ａを構成する遮熱板素子３ｃ、３ｄの各金属板４ｃ、４ｄと各断熱材５ｃ、５ｄとを、前記各ステープル１０、１０により互いに結合している。この為、これら各金属板４ｃ、４ｄと各断熱材５ｃ、５ｄとを分離不能に結合した状態で、自動車メーカ等に納品する為の梱包及び輸送を行う事ができる。この結果、前記遮熱板１ａの納品コストの低減を図れる。又、前記各金属板４ｃ、４ｄと前記各断熱材５ｃ、５ｄとを接着剤により結合する場合と比べて、結合作業に要する時間を短くできると共に、材料コストを抑える事もできる。
又、前記遮熱板１ａを、前記排気管２等の使用時に高温となる部材に対して組み付ける際、前記各金属板４ｃ、４ｄと各断熱材５ｃ、５ｄとが、互いにずれたり、分離する事がない。この為、前記遮熱板１ａの組み付け性を向上でき、組み立て作業効率の向上を図れる。 In the case of the heat shield plate 1a of this example having the above-described configuration, the metal plates 4c and 4d and the heat insulating materials 5c and 5d of the heat shield plate elements 3c and 3d constituting the heat shield plate 1a are The staples 10 and 10 are connected to each other. For this reason, the metal plates 4c and 4d and the heat insulating materials 5c and 5d can be packaged and transported for delivery to an automobile manufacturer or the like in a state where the metal plates 4c and 4d are inseparably coupled. As a result, the delivery cost of the heat shield plate 1a can be reduced. Further, as compared with the case where the metal plates 4c and 4d and the heat insulating materials 5c and 5d are bonded with an adhesive, the time required for the bonding operation can be shortened and the material cost can be reduced.
Further, when the heat shield plate 1a is assembled to a member that becomes hot when the exhaust pipe 2 or the like is used, the metal plates 4c, 4d and the heat insulating materials 5c, 5d are shifted from each other or separated. There is nothing. For this reason, the assembly property of the heat shield plate 1a can be improved, and the assembly work efficiency can be improved.

又、本例の場合、前記両遮熱板素子３ｃ、３ｄの各金属板４ｃ、４ｄ同士を、スポット溶接或いはかしめ固定により結合固定している。この為、前述した従来構造の様に、各金属板４ａ、４ｂ同士をボルト８、８（図５参照）及びナット９、９により結合固定する場合と比べて、部品点数を低減できると共に、全体の重量を軽減できる。
又、前述した従来構造の様に、各金属板４ａ、４ｂ同士をボルト８、８及びナット９、９により結合固定する場合、これら金属板４ａ、４ｂの厚さ寸法をある程度大きくする必要がある。ところが、本例の様に前記各金属板４ｃ、４ｄと前記各断熱材５ｃ、５ｄとを前記各ステープル１０、１０により結合する構造の場合、前記各金属板４ｃ、４ｄの厚さ寸法が大きいと、前記各ステープル１０、１０により、これら各金属板４ｃ、４ｄを打ち抜く事が難しくなる。この様な観点から、本発明を実施する場合には、前記両遮熱板素子３ｃ、３ｄの各金属板４ｃ、４ｄ同士の結合方法を、ボルト及びナットを用いた結合方法ではなく、スポット溶接或いはかしめ固定にする事が好ましい。尚、前記遮熱板１ａの使用状態によっては、前記各取付フランジ部６ｃ、６ｃ（６ｄ、６ｄ）同士を、別のステープルを用いて結合する事もできる。 In the case of this example, the metal plates 4c, 4d of the heat shield plate elements 3c, 3d are coupled and fixed by spot welding or caulking. Therefore, as in the conventional structure described above, the metal plates 4a, bolts 8,8 and 4b together (see FIG. 5) and compared with the case of binding fixed by nuts 9, 9, with Ru number of parts can be reduced, The overall weight can be reduced.
Further, when the metal plates 4a and 4b are coupled and fixed to each other by the bolts 8 and 8 and the nuts 9 and 9 as in the conventional structure described above, it is necessary to increase the thickness of the metal plates 4a and 4b to some extent. . However, when the metal plates 4c and 4d and the heat insulating materials 5c and 5d are joined by the staples 10 and 10 as in this example, the thickness of the metal plates 4c and 4d is large. The staples 10 and 10 make it difficult to punch out the metal plates 4c and 4d. From this point of view, when the present invention is carried out, the method of connecting the metal plates 4c, 4d of the heat shield plate elements 3c, 3d is not a method of using bolts and nuts but spot welding. Alternatively, it is preferable to fix by caulking. Depending on the usage state of the heat shield plate 1a, the mounting flange portions 6c, 6c (6d, 6d) may be joined together using different staples.

本発明を実施する場合に、遮熱板を構成する金属板は、単板だけでなく、ステープルで打ち抜く事が可能な範囲で、積層板とする事もできる。
又、金属板と断熱材とを結合するステープルの数及び大きさ（連続部及び打ち抜き部の長さ）は、この金属板及び断熱材の大きさ及びこれら両部材同士の結合力を考慮して、適宜決定する。
又、本発明を実施する場合には、遮熱板の全体を筒状に形成する必要はない。具体的には、部分筒状（例えば、半円筒状）の金属板及び断熱材により、全体が部分筒状（例えば、半円筒状）の遮熱板とする事もできる。
更に、前述した実施の形態では、ステープルを、金属板及び断熱材の外側（組み付け状態に於いて、高温となる部材から遠い側）から打ち抜いた状態で固定している。但し、本発明とは異なるが、ステープルを、前記金属板及び前記断熱材の内側（組み付け状態に於いて、高温となる部材に近い側）から打ち抜いた状態で固定する事もできる。 In carrying out the present invention, the metal plate constituting the heat shield plate can be a laminated plate as long as it can be punched with staples as well as a single plate.
In addition, the number and size of staples for joining the metal plate and the heat insulating material (the length of the continuous portion and the punched portion) take into consideration the size of the metal plate and the heat insulating material and the bonding force between these two members. Determine as appropriate.
Moreover, when implementing this invention, it is not necessary to form the whole heat shield in the cylinder shape. Specifically, the whole cylindrically-shaped (for example, semi-cylindrical) metal plate and heat insulating material can also be used as a heat-shielding plate that is partially cylindrical (for example, semi-cylindrical).
Furthermore, in the above-described embodiment, the staple is fixed in a state of being punched from the outside of the metal plate and the heat insulating material (the side far from the member that becomes high in the assembled state). However, although different from the present invention, the staple can be fixed in a state of being punched from the inside of the metal plate and the heat insulating material (the side close to the member that becomes high in the assembled state).

１、１ａ遮熱板
２排気管
３ａ、３ｂ、３ｃ、３ｄ遮熱板素子
４ａ、４ｂ、４ｃ、４ｄ金属板
５ａ、５ｂ、５ｃ、５ｄ断熱材
６ａ、６ｂ、６ｃ、６ｄ取付フランジ部
７貫通孔
８ボルト
９ナット
１０ステープル
１１打ち抜き部
１２連続部
DESCRIPTION OF SYMBOLS 1, 1a Heat shield plate 2 Exhaust pipe 3a, 3b, 3c, 3d Heat shield plate element 4a, 4b, 4c, 4d Metal plate 5a, 5b, 5c, 5d Heat insulating material 6a, 6b, 6c, 6d Mounting flange part 7 Through Hole 8 Bolt 9 Nut 10 Staple 11 Punched part 12 Continuous part

Claims

A partially cylindrical metal plate formed in a shape that covers at least a part of the member that becomes hot during use by press working;
On the inside of the metal plate, the metal plate and arranged in contact with each, and the partial tubular heat insulating material to be used in contact with the outer surface of the member to which the inner surface is the hot,
A staple having a punched portion of the pair, a heat shield plate provided with,
The metal plate and the heat insulating material are bonded to each other by the staple fixed in a state in which the metal plate and the heat insulating material are punched from outside ,
Of the outer surface of the metal plate, a portion where the staple is punched is provided with a concave portion having a flat bottom surface, and the bottom portion is larger than the distance between the pair of punched portions. Board.

The heat shield plate according to claim 1, wherein a thickness dimension of a bottom portion of the concave portion is smaller than a thickness dimension of other portions .

The heat shield plate according to any one of claims 1 to 2, wherein the concave portion is circular, and a diameter of the bottom portion is larger than a distance between the pair of punched portions .

It consists of a pair of semi-cylindrical heat shield elements,
Both of these heat shield plate elements are composed of a pair of semi-cylindrical metal plates and a pair of semi-cylindrical heat insulating materials,
The whole metal plate is formed in a cylindrical shape by joining both the metal plates in a state where both ends in the circumferential direction are opposed to each other. The described heat shield.

Mounting flange portions are formed at both ends in the circumferential direction of the respective metal plates in a state of extending radially outward, and the respective mounting flange portions of the respective metal plates are opposed to each other in the circumferential direction. The heat shield plate according to claim 4, wherein these mounting flange portions are bonded and fixed together by welding or caulking.