JPS5916685A - Joint structure of metallic sheet - Google Patents

Abstract

PURPOSE:To obtain a titled joint structure which is capable of sealing a joint part at a low cost in a short working time, by providing a projecting line extending over the whole area in the width direction, on one of joint part overlapped faces of two metallic sheets, and constituting so that spot welding is executed along the vicinity of this projecting line. CONSTITUTION:A projecting line 9 is provided extending over the whole area in the width direction on a joint part overlapped face 8 of one plate 7 of two metallic thin plates 6, 7 to be joined, and a position being adjacent to the projecting line 9 of the outside of the projecting line is subjected to spot welding 10 along the projecting line 9. In this way, the projecting line 9 is welded with pressure to an overlapped face 11 of the plate 6 of the other side, and the overlapped faces 8, 11 of both the plates 6, 7 are sealed exactly.

Description

【発明の詳細な説明】 この発明は、スポット溶接のみによって金属薄板の接合
と該接合部のシールを可能とする金属薄板の接合構造に
関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a joining structure for thin metal plates that enables joining of thin metal plates and sealing of the joint by only spot welding.

一般に金属薄板の重ね合せ接合部でシールを必要とする
部分、例えば自動車のフロアメインのダツシュロアとフ
ロントフロア、またはフロントフロアとリアフロアフロ
ント、更にはりアフロアフロントとリアフロアリアの各
接合部、は従来第１図ａ　％　ｂ　ｓ　ｃに示すような
接合構造になっていた。すなわち、第１図ａに示すもの
は金属薄板（以下略して単に板と呼ぶ）■、２の接合部
３の端部を幅方向全域に亘ってアーク溶接したものであ
り、第１図すに示すものは両板ｌ、２の接合部３の重ね
合せ面（図中斜線部分）にスポットシーラーを塗布した
後、スポット溶接４を行なったものである。また、第１
図Ｃに示すものは両板１．２の接合部３にスポット溶接
４を行なった後、塗装に先立って熱硬化性材料からなる
塗装シーラー５を接合部３の端部に幅方向全域に亘って
塗布し、その上から塗装を施したものである。In general, parts that require sealing at overlapping joints of thin metal sheets, such as the joints between the main floor of an automobile, the lower and front floor, the front floor and rear floor, and the joints between the front and rear floor of a car, have conventionally been The bonding structure was as shown in Figure 1a%bsc. In other words, what is shown in Fig. 1a is a thin metal plate (hereinafter simply referred to as a plate) (hereinafter simply referred to as a plate) in which the end of the joint 3 of 2 is arc welded over the entire width direction. What is shown is a case in which a spot sealer is applied to the overlapping surfaces (shaded areas in the figure) of the joint 3 of both plates 1 and 2, and then spot welding 4 is performed. Also, the first
In the case shown in Figure C, after spot welding 4 is performed on the joint 3 of both plates 1.2, a paint sealer 5 made of a thermosetting material is applied to the end of the joint 3 over the entire width direction before painting. It is coated with a coat of paint and then painted over it.

しかしながら、このような従来の金属薄板の接合構造に
あっては、アーク溶接を行なうものは溶接棒が必要であ
る上に溶接時間が長くまた自動化が難しいという問題点
があり、スポットシーラーを塗布するものは該シーラー
を塗布した後にスポット溶接を行なわなければならない
ため、該シーラーが絶縁膜となって両板間の通電性が悪
くなり溶接不良が生じて強度が低下するという問題点が
ある。また、熱硬化性の塗装シーラーを塗布するものは
塗布の工程が特別に必要であるという問題点がある。However, in conventional joining structures of thin metal sheets, arc welding requires a welding rod, welding time is long, and automation is difficult. Since spot welding must be performed after applying the sealer, there is a problem in that the sealer acts as an insulating film, which impairs the electrical conductivity between the two plates, resulting in poor welding and reduced strength. Additionally, there is a problem in that a special coating process is required for those that apply a thermosetting paint sealer.

この発明は、このような従来の問題点に着目してなされ
たもので、金属薄板の接合構造を、接合する２枚の金属
薄板の接合部重ね合せ面の一方に幅方向全域に亘る突条
を設けるとともに、該突条に沿って該突条の近傍をスポ
ット溶接する構造とすることにより、上記問題点を解決
することを目的としている。This invention was made by focusing on such conventional problems, and the joining structure of metal thin plates is improved by adding a protrusion extending over the entire width direction on one of the overlapping surfaces of the joint part of two metal sheets to be joined. It is an object of the present invention to solve the above-mentioned problems by providing a structure in which spot welding is performed along the protruding ridges and near the ridges.

以下、この発明を図面に基づいて説明する。The present invention will be explained below based on the drawings.

第２〜６図は、この発明に係る実施例を示す図である。2 to 6 are diagrams showing embodiments of the present invention.

まず、第２図に示す第１実施例は、接合する板６．７の
うち一方の板７の接合部重ね合せ面８にその幅方向全域
に亘って突条９を設けるとともに、該突条９よりも外部
側の該突条９に近接した位置を該突条９に沿ってスポッ
ト溶接１０シたものである。両板６．７が溶接されると
第３図の断面図に示すように突条９が相手側の板６の重
ね合せ面１１に圧接されるため、両板６．７の重ね合せ
面８．１１の間は確実にシールされることとなる。First, in the first embodiment shown in FIG. 2, a protrusion 9 is provided on the overlapping surface 8 of the joint portion of one of the plates 6 and 7 to be joined over the entire width direction, and the protrusion 9 is Spot welding 10 is performed along the protrusion 9 at a position closer to the protrusion 9 on the outer side than the protrusion 9. When both plates 6.7 are welded, the protrusion 9 is pressed against the overlapping surface 11 of the mating plate 6 as shown in the sectional view of FIG. .11 will be reliably sealed.

第４図には第２実施例が示してあり、この実施例は前記
第１実施例における突条９と同様の突条を２条９ａ、９
ｂ互いに平行に接近させて設け、両突条９ａ、９ｂの間
を該両突条９ａ、９ｂに沿ってスポット溶接１０シたも
のである。A second embodiment is shown in FIG. 4, and this embodiment has two protrusions 9a and 9 similar to the protrusion 9 in the first embodiment.
(b) They are provided parallel to each other and close to each other, and spot welding 10 is performed between both protrusions 9a and 9b along both protrusions 9a and 9b.

この第２実施例にあっては、両突条９ａ、９ｂによって
２重にシールがなされるためシールがより確実となる。In this second embodiment, since the two protrusions 9a and 9b provide double sealing, the sealing becomes more reliable.

なお、２条の突条９ａ、９ｂは図に示すようにそれぞれ
の板６．７の重ね合せ部に１条づつ設けてもよく、また
２条ともいずれか一方の板に設けてもよい。Note that the two protrusions 9a and 9b may be provided one each at the overlapping portion of each plate 6.7 as shown in the figure, or both may be provided on either one of the plates.

第５図に示す第３実施例は、前記第１実施例で示した突
条９と同様の単一の突条９ｃの両側方を該突条９ｃに沿
ってスポット溶接？０したものであり、突条９ｃがより
強く相手側の板６の重ね合せ面１１に圧接されるためシ
ールが確実となる。なお、この場合、第６図に示すよう
に、突条９ｃに対して外部側の溶接点１０間のピッチＰ
、を内部側の溶接点１０間の通常のピンチＰ（２５〜１
００ｍ）よりも小さくすることによって、シール性をよ
り向上させることができる。The third embodiment shown in FIG. 5 uses spot welding along both sides of a single protrusion 9c similar to the protrusion 9 shown in the first embodiment. 0, and the protrusion 9c is more strongly pressed against the overlapping surface 11 of the mating plate 6, so that the sealing is ensured. In this case, as shown in FIG. 6, the pitch P between the welding points 10 on the outside of the protrusion 9c
, the normal pinch P (25~1
00 m), the sealing performance can be further improved.

第７図には前記各実施例を自動車のフロアメイン構成部
材の接合に適用する場合の適用部位の一例が示しである
。すなわち、同図においてＥ部はダツシュロアパネル１
２とフロントフロアパネル１３との接合部、Ｆ部はフロ
ントフロアパネル１３とリアフロアフロントパネル１４
との接合Ｂであり、Ｇ部はリアフロアフロントパネル１
４とリアフロアリアパネル１５との接合部である。FIG. 7 shows an example of an application site where each of the above-mentioned embodiments is applied to joining the main structural members of the floor of an automobile. That is, in the same figure, part E is the lower panel 1.
2 and the front floor panel 13, and the F section is the joint between the front floor panel 13 and the rear floor front panel 14.
This is the joint B, and the G part is the rear floor front panel 1.
4 and the rear floor rear panel 15.

これら各接合部Ｅ、Ｆ、Ｇにあっては、第６図について
前述したように、突条に対して外部側の溶接点間のピッ
チを内部側の溶接点間のピッチよりも小さくしてシール
性を向上させることが望ましい。In each of these joints E, F, and G, as described above with reference to FIG. It is desirable to improve sealing performance.

以上説明してきたようにこの発明によれば、金属薄板の
接合構造を、接合する２枚の金属薄板の接合部重ね合せ
面の一方に幅方向全域に亘る突条を設けるとともに、該
突条に沿って該突条の近傍をスポット溶接する構造とし
たため、スポットシーラーや塗装シーラーを必要とせず
短い加工時間で廉価に接合部のシールが可能となり、製
品のコストダウンおよび生産性の向上が図れる上に、シ
ーラーを使用することがないので作業場の汚れが少なく
、作業環境が良くなるという効果が得られる。As described above, according to the present invention, the joining structure of thin metal plates is provided with a protrusion extending over the entire width direction on one of the overlapping surfaces of the joint portion of two thin metal plates to be joined, and on the protrusion. The structure is such that spot welding is performed near the protrusions along the line, making it possible to seal the joint at a low cost and in a short processing time without requiring spot sealers or paint sealers, reducing product costs and improving productivity. Additionally, since no sealer is used, there is less dirt in the workplace, resulting in a better working environment.

【図面の簡単な説明】[Brief explanation of the drawing]

第１図ａ　％　ｂ　ｓ　ｃはそれぞれ従来の金属薄板の
接合構造を示す説明図であって、第１図ａはアーク溶接
によるもの、第１図すはスポット溶接とスポットシーラ
ーとの組合せによるもの、第１図Ｃはスポット溶接と塗
装シーラーとの組合せによるものであり、第２図はこの
発明に係る金属薄板の接合構造の第１実施例を示す斜視
図、第３図は第２図のｍ−ｍ矢視断面図、第４図はこの
発明に係る金属薄板の接合構造の第２実施例の断面図、
第５図はこの発明に係る金属薄板の接合構造の第３実施
例の断面図、第６図は第５図のＶＩ−Ｖｌ矢視図、第７
図はこの発明に係る金属薄板の接合構造を自動車のフロ
アメイン構成部材の接合に適用する場合の適用部位の一
例を示す説明図である。 ６．７−−−一−−金属薄板、 ８．１１−−−−−一接合部重ね合せ面、９．９ａ、９
ｂ、９ｃｍ−−−一突条、１０−−−−−スポット溶接
点。 特許出願人　　　　　日産自動車株式会社代理人弁理士
有我軍一部 第１図 （ＣＩ） （ｂ） （Ｃ）Figure 1 a % b sc c are explanatory diagrams showing conventional joining structures of metal thin plates, in which Figure 1 a is by arc welding, and Figure 1 is by a combination of spot welding and spot sealer. , FIG. 1C is a combination of spot welding and paint sealer, FIG. 2 is a perspective view showing the first embodiment of the joining structure of thin metal plates according to the present invention, and FIG. 3 is a combination of spot welding and paint sealer. 4 is a cross-sectional view of a second embodiment of the joining structure of thin metal plates according to the present invention,
5 is a cross-sectional view of a third embodiment of the joining structure of thin metal plates according to the present invention, FIG. 6 is a view taken along the line VI-Vl in FIG. 5, and FIG.
The figure is an explanatory view showing an example of an application site when the metal thin plate joining structure according to the present invention is applied to joining the main structural members of the floor of an automobile. 6.7---1---Metal thin plate, 8.11---1 Joint overlapping surface, 9.9a, 9
b, 9cm---single protrusion, 10---spot welding points. Patent Applicant Nissan Motor Co., Ltd. Patent Attorney Ugagun Part 1 (CI) (b) (C)

Claims (1)

【特許請求の範囲】[Claims] 接合する２枚の金属薄板の接合部重ね合せ面の一方に幅
方向全域に亘る突条を設けるとともに、該突条に沿って
該突条の近傍をスポット溶接することを特徴とする金属
薄板の接合構造。A thin metal plate characterized in that a protrusion extending over the entire width in the width direction is provided on one of the overlapping surfaces of the joint portion of two thin metal plates to be joined, and the vicinity of the protrusion is spot welded along the protrusion. Joint structure.