JP2519838Y2 - Structural member - Google Patents
Structural memberInfo
- Publication number
- JP2519838Y2 JP2519838Y2 JP6651490U JP6651490U JP2519838Y2 JP 2519838 Y2 JP2519838 Y2 JP 2519838Y2 JP 6651490 U JP6651490 U JP 6651490U JP 6651490 U JP6651490 U JP 6651490U JP 2519838 Y2 JP2519838 Y2 JP 2519838Y2
- Authority
- JP
- Japan
- Prior art keywords
- structural member
- curvature
- cross sill
- bent portion
- radius
- 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 - Lifetime
Links
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- Rod-Shaped Construction Members (AREA)
Description
【考案の詳細な説明】 〔産業上の利用分野〕 本考案は、支持部材に固着された基部と、該基部に対
して、湾曲した折り曲げ部を介して一体に連設された立
壁部とを有し、該立壁部の自由端側に他の板材が固着さ
れている構造部材に関する。DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention includes a base portion fixed to a support member and a standing wall portion integrally connected to the base portion through a curved bent portion. The present invention relates to a structural member having another plate member fixed to the free end side of the standing wall portion.
上記形式の構造部材は、自動車の車体、建造物又はそ
の他の各種機械、装置において広く採用されている。The above-mentioned type of structural member is widely used in automobile bodies, buildings, and various other machines and devices.
このような構造部材が、例えばこれを支持する支持部
材側から加振力、ないしは繰返し荷重を受けると、構造
部材の基部と立壁部の間の折り曲げ部が曲げ変形する。
このとき、構造部材の長手方向端部の折り曲げ部に応力
が集中する傾向となり、このため、ここに早期に亀裂が
発生する恐れがある。When such a structural member receives, for example, an oscillating force or a repeated load from the side of the supporting member that supports the structural member, the bent portion between the base portion and the standing wall portion of the structural member is bent and deformed.
At this time, stress tends to be concentrated on the bent portion at the longitudinal end of the structural member, which may cause early cracking.
そこで従来は、構造部材の長手方向中央領域から端部
に向けてその折り曲げ部の曲率半径を順次拡大させ、構
造部材端部の折り曲げ部への応力集中を緩和し、その亀
裂の発生を防止していた。Therefore, conventionally, the radius of curvature of the bent portion is sequentially increased from the central region in the longitudinal direction of the structural member toward the end portion, stress concentration on the bent portion of the structural member end is relaxed, and the occurrence of cracks is prevented. Was there.
〔考案が解決しようとする課題〕 上述のように折り曲げ部の曲率半径を徐変させること
により、構造部材端部への応力集中を抑制できるが、こ
の構成だけでは充分とは言えず、従来はその対策とし
て、構造部材の厚板を厚くし、端部の亀裂発生を防止し
ていた。[Problems to be Solved by the Invention] By gradually changing the radius of curvature of the bent portion as described above, it is possible to suppress stress concentration at the end of the structural member, but this configuration alone is not sufficient, and conventionally As a countermeasure, the thick plate of the structural member is made thick to prevent the occurrence of cracks at the ends.
ところが構造部材の板厚を厚くすれば、重量とコスト
が上昇する不具合を免れない。However, if the plate thickness of the structural member is increased, it is inevitable that the weight and cost increase.
本考案の目的は、上記従来の欠点を簡単な構成によっ
て除去した構造部材を提供することである。An object of the present invention is to provide a structural member in which the above-mentioned conventional drawbacks are eliminated by a simple structure.
本考案は上記目的を達成するため、冒頭に記載した形
式の構造部材において、構造部材の長手方向端部におけ
る折り曲げ部の曲率半径を、他の部分の折り曲げ部の曲
率半径よりも大きく設定し、これら折り曲げ部を段部を
介して接続し、各折り曲げ部の曲率半径を急変させた構
成を提案する。In order to achieve the above object, the present invention sets, in a structural member of the type described at the beginning, a radius of curvature of a bent portion at a longitudinal end of the structural member to be larger than a radius of curvature of a bent portion of another portion, We propose a configuration in which these folds are connected via a step and the radius of curvature of each fold is suddenly changed.
構造部材に繰返し荷重ないしは加振力が加えられたと
き、その端部折り曲げ部の曲率半径が他の部分の曲率半
径よりも大きいため、構造部材端部の折り曲げ部への応
力集中が緩和され、しかも互いに曲率半径の異なる折り
曲げ部間の段部が補強リブとして作用し、その剛性が高
められる結果、長期に亘って構造部材端部の折り曲げ部
に亀裂が発生することを阻止できる。When the structural member is repeatedly subjected to a load or an oscillating force, the radius of curvature of the end bent portion is larger than the radius of curvature of the other part, so stress concentration on the bent portion of the end of the structural member is relaxed, Moreover, the step between the bent portions having different radii of curvature acts as a reinforcing rib, and the rigidity thereof is increased, and as a result, it is possible to prevent cracks from being generated in the bent portion at the end of the structural member for a long period of time.
以下、構造部材がトラックにおける荷台のフロアパネ
ル補強用のクロスシルとして構成された実施例を図面に
従って説明する。Hereinafter, an embodiment in which the structural member is configured as a cross sill for reinforcing a floor panel of a luggage carrier in a truck will be described with reference to the drawings.
第１図はトラックの側面図であり、１はトラックのキ
ャブ、２はキャブ１の後方に位置する荷台を示してい
る。荷台２は第２図及び第３図にも示すように、フロア
パネル３と、その両側方に位置するサイドパネル４を有
し、サイドパネル４を構成するアウタパネル５とインナ
パネル６は、その上端部が一体に固着され、インナパネ
ル６の下端がフロアパネル３の側部フランジ７にスポッ
ト溶接されている。FIG. 1 is a side view of a truck, in which 1 is a cab of the truck and 2 is a cargo bed located behind the cab 1. As shown in FIGS. 2 and 3, the luggage carrier 2 has a floor panel 3 and side panels 4 located on both sides of the floor panel 3, and the outer panel 5 and the inner panel 6 forming the side panel 4 have upper ends thereof. The parts are integrally fixed, and the lower end of the inner panel 6 is spot-welded to the side flange 7 of the floor panel 3.
フロアパネル３の裏面には、本考案に係る構造部材の
一例であるクロスシル８が荷台２の横方向に複数個配設
され、第１図及び第４図に示すように、クロスシル８の
下方に、トラックの前後方向に延びるシャシフレーム９
が位置している。On the back surface of the floor panel 3, a plurality of cross sills 8 as an example of the structural member according to the present invention are arranged in the lateral direction of the loading platform 2, and as shown in FIGS. Chassis frame 9 extending in the front-back direction of the truck
Is located.
クロスシル８は、第４図及び第５図に明示する如く、
平板状の基部10と、この基部10に対して、湾曲した折り
曲げ部11を介して一体に連設された一対の立壁部12を有
し、各立壁部12の自由端に一体に形成されたフランジ部
13がフロアパネル３の裏面に密着し、第５図にＸ印で示
したようにスポット溶接によって両者が互いに固着され
ている。またクロスシル８の最端部に形成されたエンド
フランジ部14がフロアパネル３の側部フランジ７に密着
し、第５図にＸ印で示した如く、これらもスポット溶接
により固着されている。結局、第３図に示したようにク
ロスシル８のエンドフランジ部14とフロアパネル３の側
部フランジ７とサイドパネル４のインナパネル６下端が
互いに重ね合されてスポット溶接により一体化されてい
る。The cross sill 8 is, as clearly shown in FIGS. 4 and 5,
A flat plate-shaped base portion 10 and a pair of standing wall portions 12 that are integrally connected to the base portion 10 via curved bent portions 11 are provided, and are integrally formed at the free ends of the respective standing wall portions 12. Flange part
13 adheres to the back surface of the floor panel 3, and they are fixed to each other by spot welding as shown by the X mark in FIG. Further, the end flange portion 14 formed at the outermost end of the cross sill 8 is in close contact with the side flange 7 of the floor panel 3, and these are also fixed by spot welding as shown by the X mark in FIG. After all, as shown in FIG. 3, the end flange portion 14 of the cross sill 8, the side flange 7 of the floor panel 3 and the lower end of the inner panel 6 of the side panel 4 are superposed on each other and integrated by spot welding.
第４図に示すようにシャシフレーム９の側面には支持
ブラケット15が固着され、この支持ブラケット15とクロ
スシル８がボルト16とナット17によって一体に固着され
ている。18は第６図にも示すようにクロスシル８に溶着
された補強板を示し、19,20はシムをそれぞれ示してい
る。As shown in FIG. 4, a support bracket 15 is fixed to the side surface of the chassis frame 9, and the support bracket 15 and the cross sill 8 are integrally fixed by bolts 16 and nuts 17. Reference numeral 18 indicates a reinforcing plate welded to the cross sill 8 as shown in FIG. 6, and reference numerals 19 and 20 indicate shims.
上述のように構造部材を構成する各クロスシル８は、
その基部10が支持部材を構成するシャシフレーム９の支
持ブラケット15に固着され、またクロスシル８の立壁部
自由端側には他の板材の一例を構成するフロアパネル３
が固着されている。Each cross sill 8 constituting the structural member as described above,
The base portion 10 is fixed to a support bracket 15 of a chassis frame 9 which constitutes a support member, and the floor panel 3 which constitutes an example of another plate material on the free end side of the standing wall portion of the cross sill 8.
Is stuck.
第１図に示したトラックが走行すると、路面からタイ
ヤ21に加えられた外力により、シャシフレーム９が振動
し、これがクロスシル８に伝えられる。ここで、シャシ
フレーム９が第４図に矢印Ｐで示す如く前後方向に振動
し、これがクロスシル８に伝えられると、その立壁部12
は、折り曲げ部11を中心として第４図に矢印Ａ又はＢで
示す方向に交番的に変位し、その折り曲げ部11が曲げ変
形する。このとき、先にも説明したように、クロスシル
８の長手方向端部の折り曲げ部に応力が集中し、ここに
早期に亀裂が発生する恐れがある。このため従来は、ク
ロスシルの長手方向中央領域からその端部に向けて、折
り曲げ部の曲率半径を徐々に大きくし、端部の応力集中
を緩和していたが、これだけでは不充分であり、これを
補うべくクロスシルの板厚を厚くしなければならなかっ
た。When the truck shown in FIG. 1 travels, the chassis frame 9 vibrates due to an external force applied to the tire 21 from the road surface, and this is transmitted to the cross sill 8. Here, the chassis frame 9 vibrates in the front-back direction as shown by an arrow P in FIG. 4, and when this is transmitted to the cross sill 8, the standing wall portion 12 thereof is formed.
Is alternately displaced around the bent portion 11 in the direction shown by arrow A or B in FIG. 4, and the bent portion 11 is bent and deformed. At this time, as described above, stress concentrates on the bent portion at the end of the cross sill 8 in the longitudinal direction, and there is a risk that cracks may occur at an early stage here. For this reason, conventionally, the radius of curvature of the bent portion was gradually increased from the central region in the longitudinal direction of the cross sill toward the end thereof to relax the stress concentration at the end, but this is not sufficient. To make up for this, the thickness of the cross sill had to be increased.
そこで本考案では、第５図、第７図及び第８図に例示
する如く、クロスシル８の長手方向端部における折り曲
げ部11aの曲率半径R1を、他の中央領域における折り曲
げ部11bの曲率半径R2よりも大きく設定し、しかもこれ
らの折り曲げ部11a,11bを段部22を介して接続し、各折
り曲げ部11a,11bの曲率半径R1,R2を急変させている。Therefore, in the present invention, as illustrated in FIGS. 5, 7 and 8, the radius of curvature R1 of the bent portion 11a at the longitudinal end of the cross sill 8 is set to the radius of curvature R2 of the bent portion 11b in the other central region. The bending radius is set to be larger than that, and the bending portions 11a and 11b are connected via the step portion 22 to suddenly change the radii of curvature R1 and R2 of the bending portions 11a and 11b.
上記構成によれば、クロスシル８に繰返し荷重、ない
しは加振力が作用したとき、その端部折り曲げ部11aの
曲率半径R1が他の部分の曲率半径R2よりも大きいため、
端部折り曲げ部11aへの応力集中が緩和され、しかも両
折り曲げ部11a,11bの間の段部22が補強リブとして作用
し、その剛性が高められる。このため、従来のようにク
ロスシル８の板厚を厚くしなくとも、長期に亘って折り
曲げ部11aに亀裂が発生する不具合を阻止できる。According to the above configuration, when the cross sill 8 is subjected to a repeated load or an exciting force, the radius of curvature R1 of the end bent portion 11a is larger than the radius of curvature R2 of the other portion,
The stress concentration on the end bent portion 11a is relaxed, and the step portion 22 between the both bent portions 11a and 11b acts as a reinforcing rib to increase the rigidity. Therefore, even if the plate thickness of the cross sill 8 is not increased as in the conventional case, it is possible to prevent a problem that a crack is generated in the bent portion 11a for a long period of time.
実験では、クロスシルの端部折り曲げ部11aの長手方
向長さL1を10mm、その曲率半径R1を8mmとし、クロスシ
ル中央領域の折り曲げ部11bの曲率半径R2を5mmとすると
共に、段部22をクロスシル長手方向にL2＝3mmに亘って
傾斜した状態で形成した。その結果、クロスシル端部に
おける亀裂の発生を長期に亘り阻止できた。In the experiment, the length L1 in the longitudinal direction of the end bent portion 11a of the cross sill is 10 mm, the radius of curvature R1 is 8 mm, the radius of curvature R2 of the bent portion 11b in the central region of the cross sill is 5 mm, and the step 22 is the length of the cross sill. It was formed in a state of being inclined over L2 = 3 mm in the direction. As a result, the generation of cracks at the end of the cross sill could be prevented for a long period of time.
なお、従来の荷台構造においては、クロスシル８の立
壁部上端に連設したフランジ部13とフロアパネル３をス
ポット溶接して両者を固着するだけであったが、この構
成によるとシャシフレーム９が上下方向に振動し、この
振動がクロスシル８とフロアパネル３に伝えられ、両者
が互いに離れる向きに動こうとしたとき、両者間のスポ
ット溶接部が剥離する恐れがあった。ところが図示した
実施例では、クロスシル８のエンドフランジ部14とフロ
アパネル３の側部フランジ７も、スポット溶接によって
互いに固着されているため、クロスシル８とフロアパネ
ル３の剥がれを確実に防止できる。すなわち側部フラン
ジ７とエンドフランジ部14に上下方向の加振力が作用し
て両者が互いに離れる向きに動こうとしたとき、エンド
フランジ部14と側部フランジ７を固着するスポット溶接
部には剪断力が作用するため、この溶接部の剥離が阻止
され、結局、クロスシル８とフロアパネル３の剥がれを
確実に防止することができる。一般にスポット溶接部
は、これに加えられた剪断力に対して特に大きな耐剥離
性を示し、大きな剪断力が作用しても、その剥離を防止
できるのである。Incidentally, in the conventional loading platform structure, the flange portion 13 continuously provided on the upper end of the standing wall portion of the cross sill 8 and the floor panel 3 are only spot-welded to fix them, but according to this configuration, the chassis frame 9 is vertically moved. When the cross sill 8 and the floor panel 3 are oscillated in the direction, and the vibrations are transmitted to the cross sill 8 and the floor panel 3, the spot welded portions between the two may be separated. However, in the illustrated embodiment, since the end flange portion 14 of the cross sill 8 and the side flange 7 of the floor panel 3 are also fixed to each other by spot welding, the cross sill 8 and the floor panel 3 can be reliably prevented from peeling off. That is, when a vertical vibration force acts on the side flange 7 and the end flange portion 14 to move them so as to move away from each other, the spot weld portion that fixes the end flange portion 14 and the side flange 7 together Since the shearing force acts, peeling of the welded portion is prevented, and eventually peeling of the cross sill 8 and the floor panel 3 can be reliably prevented. Generally, the spot welded portion has a particularly large peeling resistance against a shearing force applied thereto, and even if a large shearing force acts, the peeling can be prevented.
以上、荷台横方向の一方の端部側の構成を説明した
が、他方の端部側も全く同様に構成できることは当然で
ある。Although the configuration on one end side in the lateral direction of the loading platform has been described above, it goes without saying that the other end side can be configured in exactly the same manner.
また本考案は、荷台のクロスシル以外の構造部材に対
しても広く適用でき、さらに第９図に示すように、１つ
の立壁部12を有するＺ型断面のクロスシル８などの構造
部材に対しても適用できるものである。Further, the present invention can be widely applied to structural members other than the cross sill of the cargo bed, and as shown in FIG. 9, it can also be applied to structural members such as the Z-shaped cross sill 8 having one standing wall portion 12. It is applicable.
本考案によれば、構造部材の端部折り曲げ部の曲率半
径を他の部分の曲率半径よりも大きく形成して、端部折
り曲げ部への応力集中を抑制し、しかも曲率半径の異な
る折り曲げ部の間の段部が構造部材の端部を補強するリ
ブとして機能するため、長期に亘って、端部折り曲げ部
に亀裂が発生する不具合を阻止できる。According to the present invention, the radius of curvature of the end bent portion of the structural member is formed to be larger than the radius of curvature of the other portion to suppress the stress concentration on the end bent portion, Since the step portion between them functions as a rib that reinforces the end portion of the structural member, it is possible to prevent the occurrence of cracks in the bent portion of the end portion for a long period of time.
第１図はトラックの側面図、第２図はトラックの荷台を
斜め下方から見た斜視図、第３図は第１図のIII−III線
拡大断面図、第４図はクロスシルとフロアパネルを荷台
の前後方向に切断した断面図、第５図はクロスシルと、
フロアパネル及びサイドパネルの関連を示す斜視図であ
って、フロアパネルとサイドパネルを二点鎖線で表わし
た図、第６図はクロスシルに固着された補強板を示す斜
視図、第７図は第５図の矢印VII方向に見た図、第８図
は第７図の矢印VIII方向に見た図、第９図はクロスシル
の他の具体例を示す、第４図と同様な断面図である。 10……基部 11,11a,11b……折り曲げ部 12……立壁部、22……段部 R1,R2……曲率半径FIG. 1 is a side view of the truck, FIG. 2 is a perspective view of the truck bed seen obliquely from below, FIG. 3 is an enlarged sectional view taken along the line III-III of FIG. 1, and FIG. 4 shows a cross sill and a floor panel. Sectional view taken in the front-rear direction of the loading platform, Fig. 5 shows a cross sill,
FIG. 6 is a perspective view showing the relationship between the floor panel and the side panel, showing the floor panel and the side panel by two-dot chain lines, FIG. 6 is a perspective view showing the reinforcing plate fixed to the cross sill, and FIG. 5 is a view seen in the direction of arrow VII in FIG. 5, FIG. 8 is a view seen in the direction of arrow VIII in FIG. 7, and FIG. 9 is a sectional view similar to FIG. 4, showing another specific example of the cross sill. . 10 …… Base 11, 11a, 11b …… Bent 12 …… Standing wall, 22 …… Step R1, R2 …… Radius of curvature
Claims (1)
して、湾曲した折り曲げ部を介して一体に連設された立
壁部とを有し、該立壁部の自由端側に他の板材が固着さ
れている構造部材において、 該構造部材の長手方向端部における折り曲げ部の曲率半
径を、他の部分の折り曲げ部の曲率半径よりも大きく設
定し、これら折り曲げ部を段部を介して接続し、各折り
曲げ部の曲率半径を急変させたことを特徴とする構造部
材。1. A base portion fixed to a support member, and a standing wall portion integrally connected to the base portion via a curved bent portion, and another portion is provided on the free end side of the standing wall portion. In the structural member to which the plate member is fixed, the radius of curvature of the bent portion at the longitudinal end of the structural member is set to be larger than the radius of curvature of the bent portion of the other portion, and these bent portions are connected via the step portion. A structural member characterized in that the radii of curvature of each bent portion are suddenly changed by connecting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6651490U JP2519838Y2 (en) | 1990-06-23 | 1990-06-23 | Structural member |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6651490U JP2519838Y2 (en) | 1990-06-23 | 1990-06-23 | Structural member |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0425098U JPH0425098U (en) | 1992-02-28 |
| JP2519838Y2 true JP2519838Y2 (en) | 1996-12-11 |
Family
ID=31599304
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6651490U Expired - Lifetime JP2519838Y2 (en) | 1990-06-23 | 1990-06-23 | Structural member |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2519838Y2 (en) |
-
1990
- 1990-06-23 JP JP6651490U patent/JP2519838Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0425098U (en) | 1992-02-28 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |