JP2868626B2 - Lower body structure of vehicle - Google Patents
Lower body structure of vehicleInfo
- Publication number
- JP2868626B2 JP2868626B2 JP40439590A JP40439590A JP2868626B2 JP 2868626 B2 JP2868626 B2 JP 2868626B2 JP 40439590 A JP40439590 A JP 40439590A JP 40439590 A JP40439590 A JP 40439590A JP 2868626 B2 JP2868626 B2 JP 2868626B2
- Authority
- JP
- Japan
- Prior art keywords
- width direction
- vehicle width
- vehicle
- floor panel
- outer member
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Landscapes
- Body Structure For Vehicles (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、車両の下部車体構造に
係り、特に、車体フロアパネル及び該フロアパネル上で
車幅方向に延びるクロスメンバの改良に関するものであ
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lower body structure of a vehicle, and more particularly to an improvement in a vehicle body floor panel and a cross member extending in the vehicle width direction on the floor panel.
【０００２】[0002]
【従来の技術】従来より、図５に示すように、車両の下
部には車室内の床面を構成するフロアパネルａが配設さ
れており、このフロアパネルａの車幅方向中央部には上
方へ凸状となるように折曲形成されて車体前後方向に延
びるトンネル部ｂが設けられている。また、このフロア
パネルａの車幅方向外側縁には前後方向に延びる閉断面
構造で成るサイドシルｃが接続されており、更に、この
サイドシルｃと前記トンネル部ｂとの間には車幅方向に
延びるクロスメンバｄが架設されている。また、このク
ロスメンバｄは、その下端縁が前記フロアパネルａの上
面に接続されており、このフロアパネルａとの間で閉断
面構造を形成して車体下部の剛性の向上を図っている。2. Description of the Related Art Conventionally, as shown in FIG. 5, a floor panel a constituting a floor surface of a vehicle interior is provided at a lower portion of a vehicle. There is provided a tunnel portion b which is bent so as to be convex upward and extends in the vehicle front-rear direction. A side sill c having a closed cross section extending in the front-rear direction is connected to the outer edge of the floor panel a in the vehicle width direction. Further, a side sill c and the tunnel portion b are provided between the side sill c and the tunnel portion b in the vehicle width direction. An extending cross member d is provided. The lower end of the cross member d is connected to the upper surface of the floor panel a, and a closed cross-sectional structure is formed between the cross member d and the floor panel a to improve the rigidity of the lower part of the vehicle body.
【０００３】[0003]
【発明が解決しようとする課題】そして、上述したよう
な車体構造における車両の側突時においてサイドドア及
びセンタピラ―の車室内側への移動量を少なくするた
め、ドア、センタピラ―、サイドシルの剛性を向上させ
ねばならず重量が増加する。このため、実開昭６１−７
４７３号公報に開示されているように、クロスメンバと
センタピラ―との接続位置に、この両者に亘ってガセッ
トを設け、車体下部の左右両縁の剛性を向上させるよう
にしたものもある。しかしながら、このような構成で
も、ドア、サイドシル、ガセット周辺部の剛性を高めね
ばならず、重量が増加する不具合があった。The rigidity of the door, the center pillar, and the side sill is reduced in order to reduce the amount of movement of the side door and the center pillar to the vehicle interior side in the case of a side collision of the vehicle in the above-described vehicle body structure. Must be improved and the weight increases. For this reason, the actual opening 61-7
As disclosed in Japanese Patent No. 473, a gusset is provided at the connecting position between the cross member and the center pillar so as to improve the rigidity of the left and right edges of the lower part of the vehicle body. However, even with such a configuration, the rigidity around the door, the side sill, and the gusset must be increased, and there is a problem that the weight increases.
【０００４】本発明はこれらの点に鑑みてなされたもの
であって、車両側突時の変形量を抑制することができる
構成を得ることを目的とする。[0004] The present invention has been made in view of these points, and has as its object to obtain a configuration capable of suppressing the amount of deformation at the time of a vehicle side collision.
【０００５】[0005]
【課題を解決するための手段】上記の目的を達成するた
めに、本発明は、車両側突時にクロスメンバの外端位置
を車幅方向内側へ移動させることによって、サイドシル
が車室内側に倒れ込まないようにした。具体的には、フ
ロアパネルのトンネル部とサイドシルとの間にクロスメ
ンバが架設された下部車体構造を前提としている。そし
て、前記クロスメンバを、車幅方向外側の外側部材と該
外側部材の車幅方向内側に位置して外側部材に連結され
た内側部材とに分割し、前記外側部材を前記フロアパネ
ルに固定し、該外側部材とトンネル部との間にエネルギ
吸収部材を配設する。更に、前記フロアパネルにおける
前記外側部材よりも車幅方向内側位置に、車幅方向外側
から入力される荷重により変形可能な変形部を設けるよ
うな構成とした。In order to achieve the above-mentioned object, the present invention is directed to a vehicle in which a side sill falls to a vehicle interior side by moving an outer end position of a cross member inward in a vehicle width direction at the time of a vehicle side collision. I did not get stuck. Specifically, it is premised on a lower vehicle body structure in which a cross member is erected between a tunnel portion of a floor panel and a side sill. Then, the cross member is divided into an outer member on the outer side in the vehicle width direction and an inner member located inside the outer member in the vehicle width direction and connected to the outer member, and the outer member is fixed to the floor panel. An energy absorbing member is disposed between the outer member and the tunnel portion. Further, the floor panel has a configuration in which a deformable portion that can be deformed by a load input from the outside in the vehicle width direction is provided at an inner position in the vehicle width direction with respect to the outer member.
【０００６】[0006]
【作用】上記の構成により、本発明では、車両の側突時
に、フロアパネル及びクロスメンバに側突荷重が作用す
ると、フロアパネルの変形部が車幅方向に変形され、そ
れに伴って、クロスメンバの内側部材と外側部材との連
結部分が切断して、この両者が車幅方向に相対移動す
る。この相対移動の際、内側部材とトンネル部との間の
エネルギ吸収部材によって荷重吸収が行われる。このよ
うに、フロアパネル及びクロスメンバの外側端が車幅方
向中央側へ移動すると共に、エネルギ吸収部材が荷重吸
収することによって、クロスメンバの折れ曲りが抑制さ
れ、サイドシルの車室内側への倒れ込みの防止に伴って
サイドドア等の変形量が低減される。With the above arrangement, according to the present invention, when a side collision load acts on the floor panel and the cross member during a side collision of the vehicle, the deformed portion of the floor panel is deformed in the vehicle width direction. The connecting portion between the inner member and the outer member is cut, and both move relatively in the vehicle width direction. During this relative movement, the load is absorbed by the energy absorbing member between the inner member and the tunnel portion. As described above, the outer ends of the floor panel and the cross member move toward the center in the vehicle width direction, and the energy absorbing member absorbs the load, so that the bending of the cross member is suppressed, and the side sill falls into the vehicle interior. As a result, the amount of deformation of the side door and the like is reduced.
【０００７】[0007]
【実施例】次に、本発明の実施例を図面に沿って説明す
る。図１に示すように、車体の下部には車室の床面を形
成するフロアパネル１が配設されている。このフロアパ
ネル１の車幅方向中央部には、上方へ凸状となるように
折曲形成されてその内部に排気系等が配置されるトンネ
ル部２が設けられている。そして、このフロアパネル１
の特徴とするところは、前記トンネル部２の左右両側に
変形部としてのビ―ド部１ａが形成されていることにあ
る。このビ―ド部１ａは、フロアパネル１の前端から後
端に亘って波板状に湾曲形成されており、車両の側突等
の荷重が作用すると、このビ―ド部１ａが車幅方向に押
し縮められることによってフロアパネル１全体が車幅方
向中央側へスライド移動するような構成となっている。Next, an embodiment of the present invention will be described with reference to the drawings. As shown in FIG. 1, a floor panel 1 that forms a floor of a passenger compartment is disposed below the vehicle body. At the center of the floor panel 1 in the vehicle width direction, there is provided a tunnel portion 2 which is bent upward so as to be convex and in which an exhaust system and the like are arranged. And this floor panel 1
The feature of the present invention resides in that a bead portion 1a as a deformable portion is formed on both left and right sides of the tunnel portion 2. The bead portion 1a is formed in a corrugated shape from the front end to the rear end of the floor panel 1, and when a load such as a side collision of the vehicle is applied, the bead portion 1a moves in the vehicle width direction. As a result, the entire floor panel 1 slides toward the center in the vehicle width direction.
【０００８】また、図３に示すように、前記フロアパネ
ル１の車幅方向外側縁にはサイドシル３が接続されてい
る。このサイドシル３は、サイドシルインナ３ａ及びサ
イドシルアウタ３ｂから成り、この両者３ａ，３ｂが接
続されて車体前後方向に延びる閉断面構造で成ってお
り、車体下部の左右両端部の剛性を確保するようになっ
ている。As shown in FIG. 3, a side sill 3 is connected to the outer edge of the floor panel 1 in the vehicle width direction. The side sill 3 includes a side sill inner 3a and a side sill outer 3b. The side sill 3 has a closed cross-sectional structure connected to the both sides 3a, 3b and extending in the front-rear direction of the vehicle body. Has become.
【０００９】そして、前記トンネル部２とサイドシル３
との間には、車幅方向に延びるクロスメンバ４が架設さ
れている。このクロスメンバ４は、外側部材５、内側部
材６及びガイド部材７とから成っている。外側部材５
は、図１及び図２に示すように、下側に向って開放され
た略コ字状断面の部材であって、その前後各下端縁には
フランジ５ａ，５ａが形成されていて、この各フランジ
５ａ，５ａがフロアパネル１の上面に接続されており、
これによって、車幅方向に延びる閉断面構造が形成され
ている。また、この外側部材５は、その車幅方向外側端
が前記サイドシルインナ３ａの内側面に接続されている
一方、車幅方向内側端が前記ビ―ド部１ａの外側端位置
に設定されている。そして、この外側部材５内部におけ
る車幅方向内側端近傍には、この外側部材５の車幅方向
内側の開口を閉塞する縦壁部材５ｂが取付けられてい
る。The tunnel section 2 and the side sill 3
Between them, a cross member 4 extending in the vehicle width direction is provided. The cross member 4 includes an outer member 5, an inner member 6, and a guide member 7. Outer member 5
As shown in FIG. 1 and FIG. 2, is a member having a substantially U-shaped cross section opened toward the lower side, and flanges 5a, 5a are formed at lower front and rear edges thereof. The flanges 5a, 5a are connected to the upper surface of the floor panel 1,
As a result, a closed cross-sectional structure extending in the vehicle width direction is formed. The outer member 5 has an outer end in the vehicle width direction connected to the inner side surface of the side sill inner 3a, while an inner end in the vehicle width direction is set at an outer end position of the bead portion 1a. . A vertical wall member 5b that closes an opening of the outer member 5 in the vehicle width direction is attached near the inner end in the vehicle width direction inside the outer member 5.
【００１０】内側部材６は、前記外側部材５と略同断面
形状の部材であって、その車幅方向内側端には複数のフ
ランジ６ａ，６ａが形成されており、このフランジ６ａ
が前記トンネル部２の側面に接続されている。一方、こ
の内側部材６の車幅方向外側縁は前記外側部材５の車幅
方向内側縁と小寸法をもってその上側に重合わされて、
その重合部分が溶着されている。また、この溶着部分の
溶着強度は比較的低く設定されており、この部分に側突
荷重が作用すると、この溶着部分が切断されるようにな
っている。また、この内側部材６の車幅方向外側部周辺
における前後各下端縁にはフランジ６ｂ，６ｂが形成さ
れている。このフランジ６ｂ，６ｂは、図２に示すよう
に、前記外側部材５のフランジ５ａ，５ａよりもやや短
く形成されていて、該外側部材５のフランジ５ａの上面
に重合わされている。The inner member 6 is a member having substantially the same cross-sectional shape as the outer member 5, and has a plurality of flanges 6a, 6a formed at the inner end in the vehicle width direction.
Are connected to the side surface of the tunnel section 2. On the other hand, the outer edge of the inner member 6 in the vehicle width direction is overlapped with the inner edge of the outer member 5 in the vehicle width direction with a small dimension, and
The polymerized part is welded. The welding strength of this welded portion is set relatively low, and when a side impact load acts on this portion, this welded portion is cut. Further, flanges 6b, 6b are formed at the front and rear lower end edges around the outer side in the vehicle width direction of the inner member 6. As shown in FIG. 2, the flanges 6b, 6b are formed slightly shorter than the flanges 5a, 5a of the outer member 5, and are overlapped on the upper surface of the flange 5a of the outer member 5.
【００１１】ガイド部材７は、前記外側部材５のフラン
ジ５ａに沿って、該フランジ５ａの上面に取付けられて
おり、外側部材５のフランジ５ａと、このガイド部材７
との間に内側部材６のフランジ６ｂが配置されるように
なっている。これによって、外側部材５と内側部材６と
の車幅方向の相対移動をガイドするようになっている。The guide member 7 is mounted on the upper surface of the outer member 5 along the flange 5a of the outer member 5. The flange 5a of the outer member 5 and the guide member 7
And the flange 6b of the inner member 6 is arranged between them. Thereby, the relative movement of the outer member 5 and the inner member 6 in the vehicle width direction is guided.
【００１２】そして、本例の特徴の一つとして、前記内
側部材６の内部にはエネルギ吸収部材としての発泡ウレ
タン８が充填されている。この発泡ウレタン８の外側に
は前記外側部材５の縦壁部材５ｂが、内側には前記トン
ネル部２が夫々当接するようになっており、車両の側突
時における外側部材５及び内側部材６の相対移動の抵抗
として、つまり側突荷重を吸収しながら変形するように
なっている。As one of the features of this embodiment, the inside of the inner member 6 is filled with urethane foam 8 as an energy absorbing member. The vertical wall member 5b of the outer member 5 abuts on the outer side of the urethane foam 8, and the tunnel portion 2 abuts on the inner side thereof. It deforms as a resistance to relative movement, that is, while absorbing a side collision load.
【００１３】次に、上述したような構成における車両側
突時の動作について説明する。Next, the operation at the time of a vehicle side collision in the above-described configuration will be described.
【００１４】図４に示すように側突荷重がサイドドア９
や図示しないセンタピラ―等に作用すると、その側突荷
重はサイドドア９等からサイドシル３を介してクロスメ
ンバ４に作用する。これによって、クロスメンバ４の外
側部材５及びフロアパネル１に車幅方向中央側へ向う荷
重が加わる。この荷重により、クロスメンバ４の外側部
材５と内側部材６との溶着部分が切断されて外側部材５
と内側部材６とは車幅方向に相対移動自在となる。その
後、側突荷重がフロアパネル１のビ―ド部１ａに加わる
と、このビ―ド部１ａが車幅方向内方に押し縮められな
がら側突荷重を吸収する。この際、このビ―ド部１ａの
変形は、外側部材５の縦壁部材５ｂとトンネル部２との
間で発泡ウレタン８が圧縮されながら行われることにな
るために、この発泡ウレタン８によっても側突荷重が吸
収される。このように、フロアパネル１及びクロスメン
バ４の外端部が車幅方向中央側へ移動すると共にビ―ド
部１ａ及び発泡ウレタン８によって荷重が吸収されるた
めに、クロスメンバ４は折れ曲ることが防止される。こ
れによって、サイドシル３が車室内側へ倒れ込むことが
抑制されるために、サイドドア９及びセンタピラ―の変
形量が低減され車室内スペ―スを十分に確保することが
できる。また、側突荷重が大きい場合でも、前記フロア
パネル１及びクロスメンバ４が車幅方向に移動している
間はサイドシル３を変形させる荷重の作用が遅れること
になり、この遅れの間にビ―ド部１ａ及び発泡ウレタン
８によって側突荷重がある程度吸収されるために、サイ
ドシル３の倒れ込みを抑制することができる。[0014] As shown in FIG.
When it acts on a center pillar or the like (not shown), the side impact load acts on the cross member 4 via the side sill 3 from the side door 9 or the like. As a result, a load is applied to the outer member 5 of the cross member 4 and the floor panel 1 toward the center in the vehicle width direction. Due to this load, the welded portion between the outer member 5 and the inner member 6 of the cross member 4 is cut, and the outer member 5
The inner member 6 is relatively movable in the vehicle width direction. Thereafter, when a side impact load is applied to the bead portion 1a of the floor panel 1, the bead portion 1a absorbs the side impact load while being compressed inward in the vehicle width direction. At this time, since the bead portion 1a is deformed while the urethane foam 8 is being compressed between the vertical wall member 5b of the outer member 5 and the tunnel portion 2, the bead portion 1a is also deformed by the urethane foam 8. Side impact loads are absorbed. As described above, since the outer ends of the floor panel 1 and the cross member 4 move to the center in the vehicle width direction and the load is absorbed by the bead portion 1a and the urethane foam 8, the cross member 4 is bent. Is prevented. As a result, the side sill 3 is suppressed from falling into the vehicle interior, so that the amount of deformation of the side door 9 and the center pillar is reduced, and a sufficient space in the vehicle interior can be secured. Even when the side impact load is large, the action of the load for deforming the side sill 3 is delayed while the floor panel 1 and the cross member 4 are moving in the vehicle width direction. Since the side impact load is absorbed to some extent by the door portion 1a and the urethane foam 8, it is possible to suppress the side sill 3 from falling down.
【００１５】尚、本例では、フロアパネル１のビ―ド部
１ａと発泡ウレタン８との配設位置を車幅方向の同一位
置としたが、本発明はこれに限らず、ビ―ド部１ａは外
側部材５よりも車幅方向中央側に位置するように設定す
ればよく、また、発泡ウレタン８は外側部材５とトンネ
ル部２との間に配設されていればよい。In this embodiment, the bead portion 1a of the floor panel 1 and the urethane foam 8 are disposed at the same position in the vehicle width direction. However, the present invention is not limited to this. 1a may be set so as to be located closer to the center in the vehicle width direction than the outer member 5, and the urethane foam 8 may be provided between the outer member 5 and the tunnel portion 2.
【００１６】[0016]
【発明の効果】上述したように、本発明によれば、車両
の側突時に、フロアパネル及びクロスメンバの外側部材
が車幅方向中央側へ移動すると共に、エネルギ吸収部材
が荷重吸収するようになっているために、側突荷重によ
るクロスメンバの折れ曲りが抑制され、サイドシルの車
室内側への倒れ込みの防止に伴ってサイドドア等の変形
量を低減でき、車体重量を大きくすることなしに車室内
スペ―スの確保を図ることができる。As described above, according to the present invention, at the time of a side collision of the vehicle, the floor panel and the outer member of the cross member move toward the center in the vehicle width direction, and the energy absorbing member absorbs the load. Because of this, the bending of the cross member due to side impact load is suppressed, and the amount of deformation of the side doors etc. can be reduced with the prevention of the side sill falling into the vehicle interior, without increasing the weight of the vehicle body The space inside the vehicle can be secured.
【図１】車体下部におけるクロスメンバの一部を破断し
た斜視図である。FIG. 1 is a perspective view in which a part of a cross member in a lower part of a vehicle body is cut away.
【図２】図１におけるII−II線に沿った断面図である。FIG. 2 is a sectional view taken along the line II-II in FIG.
【図３】クロスメンバ周辺の正面図である。FIG. 3 is a front view around the cross member.
【図４】車両側突時における図３相当図である。FIG. 4 is a diagram corresponding to FIG. 3 at the time of a vehicle side collision;
【図５】従来のクロスメンバ周辺の斜視図である。FIG. 5 is a perspective view around a conventional cross member.
１ フロアパネル １ａ ビ―ド部（変形部） ２ トンネル部 ３ サイドシル ４ クロスメンバ ５ 外側部材 ６ 内側部材 ８ 発泡ウレタン（エネルギ吸収部材） DESCRIPTION OF SYMBOLS 1 Floor panel 1a Bead part (deformation part) 2 Tunnel part 3 Side sill 4 Cross member 5 Outer member 6 Inner member 8 Foam urethane (energy absorbing member)
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 平２−270683（ＪＰ，Ａ) 特開 昭49−116721（ＪＰ，Ａ) 実開 昭64−1179（ＪＰ，Ｕ) 実開 平１−62173（ＪＰ，Ｕ) 実開 昭59−65875（ＪＰ，Ｕ) 実開 昭61−7473（ＪＰ，Ｕ) (58)調査した分野(Int.Cl.6，ＤＢ名) B62D 25/20 ──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-2-270683 (JP, A) JP-A-49-116721 (JP, A) JP-A 64-1179 (JP, U) JP-A-1- 62173 (JP, U) Fully open sho 59-65875 (JP, U) Fully open sho 61-7473 (JP, U) (58) Fields investigated (Int. Cl. 6 , DB name) B62D 25/20
Claims (1)
との間にクロスメンバが架設された下部車体構造におい
て、前記クロスメンバは、車幅方向外側の外側部材と該
外側部材の車幅方向内側に位置して外側部材に連結され
た内側部材とに分割され、前記外側部材は前記フロアパ
ネルに固定され、該外側部材とトンネル部との間にはエ
ネルギ吸収部材が配設されており、前記フロアパネルに
おける前記外側部材よりも車幅方向内側位置には車幅方
向外側から入力される荷重により変形可能な変形部が設
けられていることを特徴とする車両の下部車体構造。1. In a lower vehicle body structure in which a cross member is provided between a tunnel portion of a floor panel and a side sill, the cross member is located on an outer member in the vehicle width direction and an inner member in the vehicle width direction of the outer member. And an inner member connected to an outer member. The outer member is fixed to the floor panel, and an energy absorbing member is disposed between the outer member and the tunnel portion. A deformable portion that is deformable by a load input from the outside in the vehicle width direction at an inner position in the vehicle width direction with respect to the outer member in (i).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP40439590A JP2868626B2 (en) | 1990-12-20 | 1990-12-20 | Lower body structure of vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP40439590A JP2868626B2 (en) | 1990-12-20 | 1990-12-20 | Lower body structure of vehicle |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04221279A JPH04221279A (en) | 1992-08-11 |
| JP2868626B2 true JP2868626B2 (en) | 1999-03-10 |
Family
ID=18514073
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP40439590A Expired - Fee Related JP2868626B2 (en) | 1990-12-20 | 1990-12-20 | Lower body structure of vehicle |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2868626B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE112009004390T5 (en) | 2008-11-17 | 2012-05-24 | Toyota Jidosha Kabushiki Kaisha | Vehicle floor structure |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3132261B2 (en) * | 1993-09-20 | 2001-02-05 | 日産自動車株式会社 | Body floor structure |
| US5979973A (en) * | 1995-07-26 | 1999-11-09 | Clare; Scott | Vehicle bed having hidden storage and transverse collapsible support beams |
| AU4006199A (en) * | 1998-05-20 | 1999-12-06 | Scott Clare | Vehicle compartment seals, strut assemblies and collapsible support members |
| DE19954296C2 (en) * | 1999-11-11 | 2003-06-18 | Porsche Ag | vehicle |
| KR102440609B1 (en) * | 2017-12-27 | 2022-09-05 | 현대자동차 주식회사 | Side vehicle body reinforcing structure |
| WO2020128565A1 (en) * | 2018-12-17 | 2020-06-25 | Arcelormittal | Front floor reinforcement structure for a vehicle having a battery pack in the tunnel |
-
1990
- 1990-12-20 JP JP40439590A patent/JP2868626B2/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE112009004390T5 (en) | 2008-11-17 | 2012-05-24 | Toyota Jidosha Kabushiki Kaisha | Vehicle floor structure |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH04221279A (en) | 1992-08-11 |
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| LAPS | Cancellation because of no payment of annual fees |