JP2009202768A - Side member and method of manufacturing the same - Google Patents

Side member and method of manufacturing the same Download PDF

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JP2009202768A
JP2009202768A JP2008048121A JP2008048121A JP2009202768A JP 2009202768 A JP2009202768 A JP 2009202768A JP 2008048121 A JP2008048121 A JP 2008048121A JP 2008048121 A JP2008048121 A JP 2008048121A JP 2009202768 A JP2009202768 A JP 2009202768A
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flat plate
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side member
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JP5016522B2 (en
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Yoshihiro Takeda
喜裕 武田
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Press Kogyo Co Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a side member capable of reducing material yield even when kick-up sections (or kick-down sections) are formed on both ends in the longitudinal direction. <P>SOLUTION: A flat plate-like member 80' is obtained as shown by a two-dot chain line in Fig.2(b) by rotating a flat plate-like member 80 by 180° around a central point 82a in a longitudinal direction of a long side 82. Since the long side 82 of the flat plate-like member and a long side 82' of the flat plate-like member 80' become point-symmetrical regarding the central point 82a (82'a) in the longitudinal direction, the long side 82 and the long side 82' are coincident with each other (overlapped) as shown in Fig.2(c). Accordingly, when a plurality of flat plate-like members 80 are cut out from one sheet of a steel plate 100, as shown in Fig.2(c), articles in which the mutual long sides 82, 82' of the two sheets of the flat plate-like members 80, 80' are brought into contact (coincident) are made one pair, and the one pair is simultaneously continuously cut from the steel plate. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

本発明は、トラックやバスなどの車両のフレームに使用されるサイドメンバ及びその製造方法に関する。   The present invention relates to a side member used for a frame of a vehicle such as a truck or a bus, and a manufacturing method thereof.

トラックやバスなどのフレーム（車枠）としては、一般に、はしご形フレームと呼ばれるものが使用されている。このはしご形フレームは通常、所定間隔離れて車輛の長さ方向に延びる２本のサイドメンバ（縦材）と、このサイドメンバに長手方向の両端部がリベットや溶接で固定された複数本のクロスメンバ（横材）とから構成されている。   As a frame (vehicle frame) for trucks and buses, a so-called ladder frame is generally used. This ladder-shaped frame usually has two side members (longitudinal members) extending in the length direction of the vehicle at a predetermined interval, and a plurality of cross members whose longitudinal ends are fixed to the side members by rivets or welding. It consists of members (cross members).

サイドメンバには、その長手方向一端部（又は両端部）が長手方向中央部よりも高くなったキックアップ部を備えたタイプや、その長手方向一端部（又は両端部）が長手方向中央部よりも低くなったキックダウン部を備えたタイプのものがある。キックアップ部を備えたサイドメンバ及びその製造方法について、図７と図８を参照して説明する。   The side member has a type having a kick-up portion in which one longitudinal end portion (or both end portions) is higher than the longitudinal central portion, or one longitudinal end portion (or both end portions) from the longitudinal central portion. There is a type with a kick-down part that is lower. A side member having a kick-up portion and a manufacturing method thereof will be described with reference to FIGS.

図７は、キックアップ部を備えたサイドメンバの一例を示す斜視図である。図８は、図７に示すサイドメンバを製造する際の一工程を示す斜視図であり、展開状態のサイドメンバを鋼板から切り出す工程を示す。   FIG. 7 is a perspective view showing an example of a side member provided with a kick-up portion. FIG. 8 is a perspective view showing one step in manufacturing the side member shown in FIG. 7, and shows a step of cutting out the unfolded side member from the steel plate.

サイドメンバ１０は横断面がコ字状のものであり、その長手方向（矢印Ａ方向であり、車両の前後方向に相当する）の両端部には、長手方向中央部１２よりも高くなったキックアップ部１４，１６が形成されている。キックアップ部１４は、長手方向中央部１２の長手方向一端１２ａから上方に傾斜しながら延びるキックアップ傾斜部１４ａと、キックアップ傾斜部１４ａの上端から直線状に延びるキックアップ直線部１４ｂとから構成されている。キックアップ部１６も同様に、長手方向中央部１２の長手方向一端１２ｂから上方に傾斜しながら延びるキックアップ傾斜部１６ａと、キックアップ傾斜部１６ａの上端から直線状に延びるキックアップ直線部１６ｂとから構成されている。   The side member 10 has a U-shaped cross section, and kicks that are higher than the central portion 12 in the longitudinal direction at both ends in the longitudinal direction (the direction of the arrow A and corresponding to the longitudinal direction of the vehicle). Up portions 14 and 16 are formed. The kick-up portion 14 includes a kick-up inclined portion 14a that extends while being inclined upward from the longitudinal end 12a of the longitudinal central portion 12, and a kick-up linear portion 14b that extends linearly from the upper end of the kick-up inclined portion 14a. Has been. Similarly, the kick-up portion 16 also has a kick-up inclined portion 16a extending while being inclined upward from the longitudinal end 12b of the longitudinal central portion 12, and a kick-up straight portion 16b extending linearly from the upper end of the kick-up inclined portion 16a. It is composed of

上記のような形状のサイドメンバ１０の材料取りに際しては、図８に示すように、サイドメンバ１０の複数の展開形状を１枚の大板２０から切断するのが一般的である。この場合、図８の斜線で示した部分はスクラップとして廃却される材料となる。１枚の大板２０から切断できる展開形状の枚数には限度があるので、特に大板２０の一方の長辺の長手方向（矢印Ａ方向）中央部のスクラップおよび他方の長辺の長手方向（矢印Ａ方向）両端部のスクラップが歩留りに及ぼす影響を無視できない。なお、キックアップ部１４，１６に代えてキックダウン部が形成されるサイドメンバであっても、上記の歩留まりに関しては同様である。   When the material of the side member 10 having the above shape is taken, it is general to cut a plurality of developed shapes of the side member 10 from one large plate 20 as shown in FIG. In this case, the hatched portion in FIG. 8 is a material discarded as scrap. Since there is a limit to the number of unfolded shapes that can be cut from one large plate 20, scrap in the longitudinal direction of one long side (in the direction of arrow A) of the large plate 20 and the longitudinal direction of the other long side (in particular) The influence of scrap on both ends on the yield cannot be ignored. Note that the above-described yield is the same even in a side member in which a kick-down portion is formed instead of the kick-up portions 14 and 16.

上記のような大板２０の長手方向中央部におけるスクラップをなくし、材料取りに際しての歩留りを向上する従来の技術を図９を参照して説明する。図９は、材料取りに際しての歩留りを向上する従来の技術を示す模式図である。   A conventional technique for eliminating the scrap in the central portion in the longitudinal direction of the large plate 20 as described above and improving the yield at the time of material removal will be described with reference to FIG. FIG. 9 is a schematic diagram showing a conventional technique for improving the yield in material collection.

図９に示すように、キックダウン部３をもつサイドメンバ１ａ’，１ｂ’の材料取りに際しては、キックダウン部３の下面形状を形取りした２つのブランク１ａ，１ｂを相互に１８０度向きを変えて切断し、その後、キックダウン部３の上面形状とテーパ部４の形状を形取りする技術が提案されている（例えば、特許文献１参照。）   As shown in FIG. 9, when taking the material of the side members 1a ′ and 1b ′ having the kick-down portion 3, the two blanks 1a and 1b shaped in the shape of the bottom surface of the kick-down portion 3 are oriented 180 degrees relative to each other. A technique has been proposed in which cutting is performed in a changed manner, and then the shape of the upper surface of the kick-down portion 3 and the shape of the tapered portion 4 are taken (see, for example, Patent Document 1).

この技術によれば、前端のキックダウン部３の下面形状と後端のテーパ部４の形状を相殺することにより材料歩留りを向上させている。従って、図７や図８に示すように、長手方向両端部ともにキックアップ形状を有するようなサイドメンバ１０には、図９に示す技術は適用できない。
特開昭６２−０５０２８２号公報 According to this technique, the material yield is improved by offsetting the shape of the lower surface of the kick-down portion 3 at the front end and the shape of the taper portion 4 at the rear end. Therefore, as shown in FIG. 7 and FIG. 8, the technique shown in FIG. 9 cannot be applied to the side member 10 in which both longitudinal ends have a kick-up shape.
Japanese Patent Laid-Open No. 62-050282

本発明は、上記事情に鑑み、その長手方向両端部にキックアップ部（又は、キックダウン部）が形成される場合であっても材料歩留まりを低減できるサイドメンバ及びその製造方法を提供することを目的とする。   In view of the above circumstances, the present invention provides a side member that can reduce the material yield even when kick-up portions (or kick-down portions) are formed at both longitudinal ends thereof, and a method for manufacturing the side member. Objective.

上記目的を達成するための本発明のサイドメンバは、直線状に延びる長手方向中央部と、該長手方向中央部の長手方向一端から上方に傾斜しながら延びるキックアップ傾斜部と、該キックアップ傾斜部の上端から直線状に延びるキックアップ直線部とが形成されて横断面がコ字状の横断面コ字状部材を備えたサイドメンバにおいて、
（１）前記横断面コ字状部材は、前記長手方向中央部と前記キックアップ直線部とが前記キックアップ傾斜部を挟んで同じ長さの位置で分割された分割部を備えたものであり、
（２）該分割部は、前記コ字状を展開して得られる一対の長辺及び短辺をもつ平板状部材の少なくとも１つの長辺が、その長手方向中央点に関して点対称となっているものであることを特徴とするものである。 In order to achieve the above object, the side member of the present invention includes a longitudinally central portion extending linearly, a kickup inclined portion extending upwardly from one longitudinal end of the longitudinal central portion, and the kickup inclined In the side member provided with a cross-sectional U-shaped member having a U-shaped cross section formed with a kick-up straight line portion extending linearly from the upper end of the portion,
(1) The U-shaped member having a transverse cross section includes a divided portion in which the central portion in the longitudinal direction and the kick-up straight portion are divided at the same length across the kick-up inclined portion. ,
(2) In the divided portion, at least one long side of the flat plate-like member having a pair of long sides and short sides obtained by developing the U-shape is point-symmetric with respect to the longitudinal center point. It is characterized by being.

また、上記目的を達成するための本願発明の他のサイドメンバは、直線状に延びる長手方向中央部と、該長手方向中央部の長手方向一端から下方に傾斜しながら延びるキックダウン傾斜部と、該キックダウン傾斜部の下端から直線状に延びるキックダウン直線部とが形成されて横断面がコ字状の横断面コ字状部材を備えたサイドメンバにおいて、
（３）前記横断面コ字状部材は、前記長手方向中央部と前記キックダウン直線部とが前記キックダウン傾斜部を挟んで同じ長さの位置で分割された分割部を備えたものであり、
（４）該分割部は、前記コ字状を展開して得られる一対の長辺及び短辺をもつ平板状部材の少なくとも１つの長辺が、その長手方向中央点に関して点対称となっているものであることを特徴とするものである。 Further, the other side member of the present invention for achieving the above object includes a longitudinally extending central portion extending linearly, a kickdown inclined portion extending while being inclined downward from one longitudinal end of the longitudinal central portion, In the side member provided with a kick-down straight part extending linearly from the lower end of the kick-down inclined part and having a U-shaped member having a U-shaped cross section,
(3) The U-shaped member having a transverse cross section includes a split portion in which the central portion in the longitudinal direction and the kick-down straight portion are split at the same length across the kick-down inclined portion. ,
(4) In the divided portion, at least one long side of the flat plate-like member having a pair of long sides and short sides obtained by developing the U-shape is point-symmetric with respect to the longitudinal center point. It is characterized by being.

ここで、
（５）前記分割部は、前記コ字状を展開して得られる一対の長辺及び短辺をもつ平板状部材の一対の長辺それぞれが、その長手方向中央点に関して点対称となっているものであってもよい。 here,
(5) Each of the pair of long sides of the flat plate member having a pair of long sides and short sides obtained by developing the U-shape is point-symmetric with respect to the longitudinal center point. It may be a thing.

また、上記目的を達成するための本発明のサイドメンバ製造方法は、直線状に延びる長手方向中央部と、該長手方向中央部の長手方向一端から上方に傾斜しながら延びるキックアップ傾斜部と、該キックアップ傾斜部の上端から直線状に延びるキックアップ直線部とが形成されて横断面がコ字状の横断面コ字状部材を備えたサイドメンバを製造するサイドメンバ製造方法において、
（６）前記キックアップ傾斜部を挟んで前記長手方向中央部と前記キックアップ直線部とが同じ長さになるように前記横断面コ字状部材を分割し、この分割したものを展開することにより形成される一対の長辺及び短辺をもつ平板形状であって、且つ、この一対の長辺のうち少なくとも１つの長辺がその長手方向中央点に関して点対称となる平板形状を得、
（７）１つの前記平板形状の１つの前記長辺と、前記長手方向中央点を中心にして他の１つの前記平板形状を１８０°回転させた他の１つの前記平板形状の１つの前記長辺とを接触させた形状をもつ２つの平面形状部材を被加工材から同時に切断し、
（８）この切断によって得られた平板形状部材をプレス加工することにより前記横断面コ字状部材の一部分を作製し、
（９）この一部分を備えたサイドメンバを製造することを特徴とするものである。 Moreover, the side member manufacturing method of the present invention for achieving the above object includes a longitudinally extending central portion extending linearly, a kick-up inclined portion extending while being inclined upward from one longitudinal end of the longitudinal central portion, In the side member manufacturing method for manufacturing a side member having a U-shaped cross-sectional member having a U-shaped cross section formed with a kick-up linear portion extending linearly from the upper end of the kick-up inclined portion,
(6) Divide the U-shaped member in cross section so that the central part in the longitudinal direction and the kick-up straight line part have the same length across the kick-up inclined part, and develop the divided part. A flat plate shape having a pair of long sides and short sides formed by, and at least one long side of the pair of long sides is point-symmetric with respect to the longitudinal center point,
(7) One long side of one flat plate shape and one long side of the other flat plate shape obtained by rotating the other flat plate shape by 180 degrees around the longitudinal center point Two planar members having a shape in contact with the side are simultaneously cut from the workpiece,
(8) A part of the U-shaped member in cross section is produced by pressing a flat plate-shaped member obtained by this cutting,
(9) A side member provided with this part is manufactured.

また、上記目的を達成するための本発明の他のサイドメンバ製造方法は、直線状に延びる長手方向中央部と、該長手方向中央部の長手方向一端から下方に傾斜しながら延びるキックダウン傾斜部と、該キックダウン傾斜部の下端から直線状に延びるキックダウン直線部とが形成されて横断面がコ字状の横断面コ字状部材を備えたサイドメンバを製造するサイドメンバ製造方法において、
（１０）前記キックダウン傾斜部を挟んで前記長手方向中央部と前記キックダウン直線部とが同じ長さになるように前記横断面コ字状部材を分割し、この分割したものを展開することにより形成される一対の長辺及び短辺をもつ平板形状であって、且つ、この一対の長辺のうち少なくとも１つの長辺がその長手方向中央点に関して点対称となる平板形状を得、
（１１）１つの前記平板形状の１つの前記長辺と、前記長手方向中央点を中心にして他の１つの前記平板形状を１８０°回転させた他の１つの前記平板形状の１つの前記長辺とを接触させた形状をもつ２つの平面形状部材を被加工材から同時に切断し、
（１２）この切断によって得られた平板形状部材をプレス加工することにより前記横断面コ字状部材の一部分を作製し、
（１３）この一部分を備えたサイドメンバを製造することを特徴とするものである。 Further, another side member manufacturing method of the present invention for achieving the above object includes a longitudinally extending central portion extending linearly and a kick-down inclined portion extending while being inclined downward from one longitudinal end of the longitudinal central portion. And a side member manufacturing method for manufacturing a side member having a U-shaped cross-sectional member having a U-shaped cross section formed with a kick-down linear portion extending linearly from the lower end of the kick-down inclined portion,
(10) Divide the U-shaped member in cross section so that the central part in the longitudinal direction and the kick-down straight line part have the same length across the kick-down inclined part, and develop the divided part. A flat plate shape having a pair of long sides and short sides formed by, and at least one long side of the pair of long sides is point-symmetric with respect to the longitudinal center point,
(11) One long side of one flat plate shape and one long side of the other flat plate shape obtained by rotating the other flat plate shape by 180 ° around the longitudinal center point Two planar members having a shape in contact with the side are simultaneously cut from the workpiece,
(12) A part of the U-shaped cross-section member is produced by pressing a flat plate-shaped member obtained by this cutting,
(13) A side member provided with this part is manufactured.

また、上記目的を達成するためのさらに他の本発明のサイドメンバ製造方法は、直線状に延びる長手方向中央部と、該長手方向中央部の長手方向一端から上方に傾斜しながら延びるキックアップ傾斜部と、該キックアップ傾斜部の上端から直線状に延びるキックアップ直線部とが形成されて横断面がコ字状の横断面コ字状部材を備えたサイドメンバを製造するサイドメンバ製造方法において、
（１４）前記キックアップ傾斜部を挟んで前記長手方向中央部と前記キックアップ直線部とが同じ長さになるように前記横断面コ字状部材を分割し、この分割したものを展開することにより形成される一対の長辺及び短辺をもつ平板形状であって、且つ、この一対の長辺のうち少なくとも１つの長辺がその長手方向中央点に関して点対称となる平板形状を得、
（１５）前記キックアップ傾斜部の傾斜が緩やかになるように前記平板形状を伸ばした伸ばし形状を得、
（１６）１つの前記伸ばし形状の１つの前記長辺と、前記長手方向中央点を中心にして他の１つの前記伸ばし形状を１８０°回転させた他の１つの前記伸ばし形状の１つの前記長辺とを接触させた形状をもつ２つの伸ばし形状部材を被加工材から同時に切断し、
（１７）この切断によって得られた伸ばし形状部材を面内方向に曲げることにより、前記平板形状の平板形状部材を作製し、
（１８）作製された平板形状部材をプレス加工することにより前記横断面コ字状部材の一部分を作製し、
（１９）この一部分を備えたサイドメンバを製造することを特徴とするものである。 In another aspect of the invention, the side member manufacturing method according to the present invention includes a longitudinally extending central portion extending linearly and a kick-up tilt extending while tilting upward from one longitudinal end of the longitudinal central portion. And a side member manufacturing method for manufacturing a side member having a U-shaped cross-sectional member having a U-shaped cross section and a kick-up straight line portion extending linearly from the upper end of the kick-up inclined portion. ,
(14) Divide the U-shaped member in cross section so that the central part in the longitudinal direction and the kick-up straight line part have the same length across the kick-up inclined part, and develop the divided part. A flat plate shape having a pair of long sides and short sides formed by, and at least one long side of the pair of long sides is point-symmetric with respect to the longitudinal center point,
(15) An elongated shape obtained by extending the flat plate shape so that the inclination of the kick-up inclined portion becomes gentle,
(16) One of the long sides of one of the elongated shapes and one other of the one of the elongated shapes obtained by rotating the other one of the elongated shapes around the center point in the longitudinal direction by 180 ° Cut two stretch-shaped members with the shape in contact with the side simultaneously from the workpiece,
(17) By bending the elongated member obtained by this cutting in the in-plane direction, the flat plate member of the flat plate shape is produced,
(18) A part of the U-shaped member in cross section is produced by pressing the produced flat plate member,
(19) A side member provided with this part is manufactured.

また、上記目的を達成するための本発明のさらに他のサイドメンバ製造方法は、直線状に延びる長手方向中央部と、該長手方向中央部の長手方向一端から下方に傾斜しながら延びるキックダウン傾斜部と、該キックダウン傾斜部の下端から直線状に延びるキックダウン直線部とが形成されて横断面がコ字状の横断面コ字状部材を備えたサイドメンバを製造するサイドメンバ製造方法において、
（２０）前記キックダウン傾斜部を挟んで前記長手方向中央部と前記キックダウン直線部とが同じ長さになるように前記横断面コ字状部材を分割し、この分割したものを展開することにより形成される一対の長辺及び短辺をもつ平板形状であって、且つ、この一対の長辺のうち少なくとも１つの長辺がその長手方向中央点に関して点対称となる平板形状を得、
（２１）前記キックダウン傾斜部の傾斜が緩やかになるように前記平板形状を伸ばした伸ばし形状を得、
（２２）１つの前記伸ばし形状の１つの前記長辺と、前記長手方向中央点を中心にして他の１つの前記伸ばし形状を１８０°回転させた他の１つの前記伸ばし形状の１つの前記長辺とを接触させた形状をもつ２つの伸ばし形状部材を被加工材から同時に切断し、
（２３）この切断によって得られた伸ばし形状部材を面内方向に曲げることにより、前記平板形状の平板形状部材を作製し、
（２４）作製された平板形状部材をプレス加工することにより前記横断面コ字状部材の一部分を作製し、
（２５）この一部分を備えたサイドメンバを製造することを特徴とするものである。 In addition, another side member manufacturing method of the present invention for achieving the above object includes a longitudinally central portion extending linearly, and a kick-down slope extending while being inclined downward from one longitudinal end of the longitudinal central portion. And a side member manufacturing method for manufacturing a side member having a U-shaped cross-sectional member having a U-shaped cross section formed with a kick-down linear portion extending linearly from the lower end of the kick-down inclined portion. ,
(20) Divide the U-shaped member in cross section so that the central portion in the longitudinal direction and the kick-down straight line portion have the same length across the kick-down inclined portion, and develop the divided portion. A flat plate shape having a pair of long sides and short sides formed by, and at least one long side of the pair of long sides is point-symmetric with respect to the longitudinal center point,
(21) Obtaining an elongated shape obtained by extending the flat plate shape so that the inclination of the kick-down inclined portion becomes gentle,
(22) One long side of one extended shape and one long side of another extended shape obtained by rotating the other extended shape by 180 ° around the central point in the longitudinal direction Cut two stretch-shaped members with the shape in contact with the side simultaneously from the workpiece,
(23) By bending the elongated member obtained by this cutting in the in-plane direction, the flat plate member of the flat plate shape is produced,
(24) Producing a part of the U-shaped member in cross section by pressing the produced flat plate-shaped member,
(25) A side member provided with this part is manufactured.

ここで、
（２６）前記被加工材として、ロール状に巻かれたロール状鋼板を用いてもよい。 here,
(26) A rolled steel plate wound in a roll shape may be used as the workpiece.

なお、ここでいう「長辺」及び「短辺」とは、直線状の辺には限定されず、曲線状の辺も含む概念である。   The “long side” and “short side” here are not limited to straight sides, but are also concepts including curved sides.

本発明によれば、コ字状を展開して得られる平板状部材の少なくとも１つの長辺がその長手方向中央点に関して点対称となっているので、２つの平板状部材の点対称となっている長辺同士を一致させて同時に切断することにより、サイドメンバの長手方向両端部にキックアップ部（又は、キックダウン部）が形成される場合であっても材料歩留まりを低減できる。   According to the present invention, since at least one long side of the flat plate member obtained by developing the U-shape is point-symmetric with respect to the longitudinal center point, the two flat plate members are point-symmetric. By cutting the long sides that coincide with each other at the same time, the material yield can be reduced even when kick-up portions (or kick-down portions) are formed at both longitudinal ends of the side members.

本発明は、トラックやバスなどの車両のフレームに使用されるサイドメンバに実現された。   The present invention has been realized in a side member used for a vehicle frame such as a truck or a bus.

図１と図２を参照して、本発明の実施例１を説明する。図１は、本発明の実施例１のサイドメンバを示す斜視図である。図２（ａ）は、図１に示すサイドメンバの第２分割部を示す斜視図であり、（ｂ）は、第２分割部を展開した展開形状を示す斜視図であり、（ｃ）は、第２分割部を展開した展開形状を材料取りする様子を示す斜視図である。   A first embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a perspective view showing a side member of Embodiment 1 of the present invention. 2A is a perspective view showing a second divided portion of the side member shown in FIG. 1, FIG. 2B is a perspective view showing a developed shape in which the second divided portion is developed, and FIG. It is a perspective view which shows a mode that material of the expansion | deployment shape which expand | deployed the 2nd division part is taken.

サイドメンバ３０の全体形状は、図７に示す従来のサイドメンバ１０と同様であるが、サイドメンバ３０の特徴は、後述するように分割されて溶接されている点に特徴がある。サイドメンバ３０は、長手方向（矢印Ａ方向）に直線状に延びる長手方向中央部４０と、この長手方向中央部４０の長手方向一端に連続して延びる第１キックアップ部５０と、長手方向中央部４０の長手方向他端に連続して延びる第２キックアップ部６０とから構成されている。長手方向中央部４０、第１キックアップ部５０、及び第２キックアップ部６０の長さや形状は、サイドメンバ３０が用いられる車種によって様々である。   The overall shape of the side member 30 is the same as that of the conventional side member 10 shown in FIG. 7, but the feature of the side member 30 is that it is divided and welded as will be described later. The side member 30 includes a longitudinal central portion 40 that linearly extends in the longitudinal direction (arrow A direction), a first kick-up portion 50 that extends continuously at one longitudinal end of the longitudinal central portion 40, and a longitudinal center. The second kick-up portion 60 extends continuously from the other longitudinal end of the portion 40. The length and shape of the longitudinal central portion 40, the first kick-up portion 50, and the second kick-up portion 60 vary depending on the vehicle type in which the side member 30 is used.

第１キックアップ部５０は、長手方向中央部４０の長手方向一端４２から上方に傾斜しながら延びる第１キックアップ傾斜部５２と、この第１キックアップ傾斜部５２の上端５２ａから直線状に延びる第１キックアップ直線部５４とから構成されている。第２キックアップ部６０も同様に長手方向中央部４０の長手方向一端４４から上方に傾斜しながら延びる第２キックアップ傾斜部６２と、この第２キックアップ傾斜部６２の上端６２ａから直線状に延びる第２キックアップ直線部６４とから構成されている。上記した長手方向中央部４０、第１キックアップ部５０、及び第２キックアップ部６０は全て、横断面がコ字状の横断面コ字状部材からなるが、後述するように、横断面がロ字状（矩形閉断面）をもつサイドメンバもある。   The first kick-up portion 50 extends linearly from a first kick-up inclined portion 52 that extends while inclining upward from one longitudinal end 42 of the longitudinal central portion 40, and an upper end 52a of the first kick-up inclined portion 52. The first kick-up straight line portion 54 is configured. Similarly, the second kick-up portion 60 extends linearly from the upper end 62a of the second kick-up inclined portion 62, and the second kick-up inclined portion 62 extends while being inclined upward from the longitudinal end 44 of the longitudinal central portion 40. The second kick-up straight portion 64 extends. The longitudinal central portion 40, the first kick-up portion 50, and the second kick-up portion 60 are all made of a U-shaped member having a U-shaped cross section. Some side members have a square shape (rectangular closed section).

上述したようにサイドメンバ３０は複数の分割部を溶接して構成されている。この複数の分割部は、直線状に延びる第１分割部（図１における長さＬ１に相当する部分）、第３分割部（図１における長さＬ３に相当する部分）、及び第５分割部（図１における長さＬ５に相当する部分）、並びに、第１キックアップ傾斜部５２とその前後の部分を含む第２分割部（図１における長さＬ２に相当する部分）及び第２キックアップ傾斜部６２とその前後の部分を含む第４分割部（図１における長さＬ４に相当する部分）からなる。第１分割部は、サイドメンバ３０の長手方向一端３２から第１キックアップ部５０の第１キックアップ直線部５４の途中部分５４ａまでの直線状部分に相当する部分である。第２分割部は、第１キックアップ直線部５４の途中部分５４ａから長手方向中央部４０の途中部分４０ａまでの部分である。第３分割部は、長手方向中央部４０の途中部分４０ａから途中部分４０ｂまでの部分である。第４分割部は、途中部分４０ｂから第２キックアップ直線部６４の途中部分６４ａまでの部分である。第５分割部は、途中部分６４ａからサイドメンバ３０の長手方向他端３４までの部分である。   As described above, the side member 30 is configured by welding a plurality of divided portions. The plurality of divided portions include a first divided portion (a portion corresponding to the length L1 in FIG. 1), a third divided portion (a portion corresponding to the length L3 in FIG. 1), and a fifth divided portion extending linearly. (A portion corresponding to the length L5 in FIG. 1), a second divided portion (a portion corresponding to the length L2 in FIG. 1) and a second kick-up including the first kick-up inclined portion 52 and its front and rear portions. It consists of the inclination part 62 and the 4th division part (part corresponding to length L4 in Drawing 1) including the part before and behind that. The first divided portion is a portion corresponding to a linear portion from one end 32 in the longitudinal direction of the side member 30 to an intermediate portion 54 a of the first kick-up straight portion 54 of the first kick-up portion 50. The second divided portion is a portion from a midway portion 54 a of the first kick-up straight line portion 54 to a midway portion 40 a of the longitudinal center portion 40. The third divided portion is a portion from the middle portion 40a to the middle portion 40b of the central portion 40 in the longitudinal direction. The fourth divided portion is a portion from the midway portion 40 b to the midway portion 64 a of the second kick-up straight line portion 64. The fifth divided portion is a portion from the midway portion 64 a to the other end 34 in the longitudinal direction of the side member 30.

本発明では、第２分割部と第４分割部（これらが本発明にいう分割部の一例である）の形状に特徴があり、両者の特徴は同じであるので、ここでは、第２分割部について説明する。   In the present invention, the second divided portion and the fourth divided portion (these are examples of the divided portion referred to in the present invention) are characterized by the same characteristics. Therefore, here, the second divided portion is the same. Will be described.

第２分割部は、長手方向中央部４０と第１キックアップ直線部５４とが第１キックアップ傾斜部５２を挟んで同じ長さの位置で分割されたものである。即ち、第１キックアップ直線部５４の途中部分５４ａから第１キックアップ傾斜部５２の上端５２ａまでの長さＬ６は、第１キックアップ傾斜部５２の下端５２ｂから長手方向中央部４０の途中部分４０ａまでの長さＬ６に等しい。ここでは、２つの長さＬ６を等しいとしたが、多少の誤差があってもよく、両者は略（ほぼ）等しければ良い。このように両者を等しく（又は、略等しく）した理由は、後述するように、サイドメンバ３０を鋼板から材料取りする際にスクラップを低減させて歩留りを向上させるためである。   In the second divided portion, the central portion 40 in the longitudinal direction and the first kick-up straight portion 54 are divided at the same length across the first kick-up inclined portion 52. That is, the length L6 from the middle portion 54a of the first kick-up straight portion 54 to the upper end 52a of the first kick-up slope portion 52 is the middle portion of the longitudinal center portion 40 from the lower end 52b of the first kick-up slope portion 52. Equal to length L6 up to 40a. Here, the two lengths L6 are assumed to be equal, but there may be some error, and it is sufficient that both are substantially (substantially) equal. The reason why the two are made equal (or substantially equal) in this way is to reduce the scrap and improve the yield when the material of the side member 30 is taken from the steel plate, as will be described later.

図２では第２分割部を符号「７０」で表しており、横断面がコ字状の第２分割部７０を展開することにより、一対の長辺８２，８４及び短辺８６，８８をもつ平板状部材（展開形状の部材）８０が得られる。この平板状部材８０を周知のプレス成型方法でプレスすることにより第２分割部７０が得られる。平板状部材８０の長辺８２は、その長手方向中央点８２ａに関して点対称となっている。本実施例１では、長辺８４は、長辺８２とは違って、その長手方向中央点に関して対称になっていない。なお、後述する実施例２では、２つの長辺８２，８４がその長手方向中央点に関して対称になっている。   In FIG. 2, the second divided portion is represented by reference numeral “70”, and has a pair of long sides 82 and 84 and short sides 86 and 88 by expanding the second divided portion 70 having a U-shaped cross section. A flat plate member (unfolded member) 80 is obtained. The 2nd division | segmentation part 70 is obtained by pressing this flat member 80 with a well-known press molding method. The long side 82 of the flat plate member 80 is point-symmetric with respect to the longitudinal center point 82a. In the first embodiment, unlike the long side 82, the long side 84 is not symmetrical with respect to the center point in the longitudinal direction. In the second embodiment to be described later, the two long sides 82 and 84 are symmetric with respect to the longitudinal center point.

長手方向中央点８２ａを中心にして平板状部材８０を１８０°回転させることにより、図２（ｂ）の二点鎖線で示すように平板状部材８０’が得られる。平板状部材８０の長辺８２と平板状部材８０’の長辺８２’は、長手方向中央点８２ａ（８２’ａ）に関して点対称となっているので、図２（ｃ）に示すように、長辺８２と長辺８２’は一致する（重なる）。従って、１枚の鋼板（又は、ロール状に巻かれたロール状鋼板）１００から複数の平板状部材８０を切り出す場合、図２（ｃ）に示すように、２枚の平板状部材８０，８０’の長辺同士８２，８２’を接触させた（一致させた）ものを一組として、この一組を連続して鋼板から同時に切断する。この場合、一組の平板状部材８０，８０’の間には、スクラップが発生せず、一組とこの一組に隣接する他の一組の間に、長辺８４’と長辺８４の形状の差に起因するスクラップ（図２（ｃ）の斜線部分）が発生する。また、一組の平板状部材８０，８０’の短辺８６，８８’はほぼ直線状となり、短辺８８，８６’もほぼ直線状となるので、適宜のサイズの鋼板１００を使用することにより、第２分割部７０の長手方向両端の外側におけるスクラップを低減でき、歩留まりが向上する。   By rotating the flat plate member 80 by 180 degrees about the longitudinal center point 82a, a flat plate member 80 'is obtained as shown by a two-dot chain line in FIG. Since the long side 82 of the flat plate member 80 and the long side 82 ′ of the flat plate member 80 ′ are symmetric with respect to the longitudinal center point 82a (82′a), as shown in FIG. The long side 82 and the long side 82 'coincide (overlap). Accordingly, when a plurality of flat plate members 80 are cut out from a single steel plate (or a rolled steel plate wound in a roll shape) 100, as shown in FIG. A pair of 'long sides 82 and 82' in contact (matched) is taken as a set, and the set is continuously cut from the steel sheet at the same time. In this case, no scrap is generated between the pair of flat members 80 and 80 ′, and the long side 84 ′ and the long side 84 are between the pair and another pair adjacent to the pair. Scrap (shaded area in FIG. 2C) due to the difference in shape is generated. Moreover, since the short sides 86 and 88 ′ of the pair of flat plate members 80 and 80 ′ are substantially linear, and the short sides 88 and 86 ′ are also substantially linear, by using the steel plate 100 of an appropriate size. The scraps on the outer sides of both ends in the longitudinal direction of the second divided portion 70 can be reduced, and the yield is improved.

上記した例では、全体に亘って横断面がコ字状のサイドメンバ３０を例に挙げて説明したが、図３（ａ）の断面図に示すように、それぞれがコ字状の横断面をもつ２つの部材１１０，１１２を溶接して一つにした矩形横断面のサイドメンバにも本発明を適用できる。また、図３（ｂ）の横断面に示すように、コ字状の横断面をもつ部材１１０の隅部にＬ字状の横断面をもつ補強部材１１４，１１６を溶接したサイドメンバにも本発明を適用できる。   In the above-described example, the side member 30 having a U-shaped cross section is described as an example. However, as shown in the cross-sectional view of FIG. The present invention can also be applied to a side member having a rectangular cross section formed by welding two members 110 and 112 having one. Further, as shown in the cross section of FIG. 3B, this is also applied to a side member in which reinforcing members 114 and 116 having L-shaped cross sections are welded to the corners of a member 110 having a U-shaped cross section. The invention can be applied.

また、上記のサイドメンバ３０は２つのキックアップ部５０，６０をもつものとしたが、いずれか一つのキックアップ部しかもたないサイドメンバにも本発明を適用できる。さらに、図４に示すようにキックダウン部１３０，１３２が形成されたサイドメンバ１２０にも本発明を適用できる。   The side member 30 has the two kick-up portions 50 and 60. However, the present invention can be applied to a side member having only one kick-up portion. Furthermore, the present invention can be applied to the side member 120 in which the kick-down portions 130 and 132 are formed as shown in FIG.

図５を参照して、本発明の実施例２を説明する。図５（ａ）は、２つの長辺がともにその長手方向中央点に関して点対称である第２分割部を示す斜視図であり、（ｂ）は、（ａ）の第２分割部を展開した展開形状を示す斜視図であり、（ｃ）は、（ａ）の第２分割部を展開した展開形状を材料取りする様子を示す斜視図である。   A second embodiment of the present invention will be described with reference to FIG. FIG. 5A is a perspective view showing a second divided portion in which two long sides are both point-symmetric with respect to the longitudinal center point, and FIG. 5B is a developed view of the second divided portion in FIG. It is a perspective view which shows the expansion | deployment shape, (c) is a perspective view which shows a mode that the material of the expansion | deployment shape which expand | deployed the 2nd division part of (a) is taken.

図５では、図２に示す第２分割部７０とほぼ同じ形状の第２分割部１７０を示すが、この第２分割部１７０の一対の長辺はいずれもその長手方向中央点に関して点対称である。横断面がコ字状の第２分割部１７０を展開することにより、一対の長辺１８２，１８４及び短辺１８６，１８８をもつ平板状部材（展開形状の部材）１８０が得られる。この平板状部材１８０を周知のプレス成型方法でプレスすることにより第２分割部１７０が得られる。なお、平板状部材１８０の長辺１８２は、その長手方向中央点１８２ａに関して点対称となっている。同様に、長辺１８４は、その長手方向中央点１８４ａに関して点対称となっている。   5 shows a second divided portion 170 having substantially the same shape as the second divided portion 70 shown in FIG. 2, but the pair of long sides of the second divided portion 170 are both point-symmetric with respect to the longitudinal center point. is there. By developing the second divided portion 170 having a U-shaped cross section, a flat plate member (a developed member) 180 having a pair of long sides 182 and 184 and short sides 186 and 188 is obtained. By pressing the flat plate member 180 by a known press molding method, the second divided portion 170 is obtained. The long side 182 of the flat plate member 180 is point-symmetric with respect to the longitudinal center point 182a. Similarly, the long side 184 is point-symmetric with respect to the longitudinal center point 184a.

長手方向中央点１８２ａを中心にして平板状部材１８０を１８０°回転させることにより、図５（ｂ）の二点鎖線で示すように平板状部材１８０’が得られる。平板状部材１８０の長辺１８２と平板状部材１８０’の長辺１８２’は、長手方向中央点１８２ａ（１８２’ａ）に関して点対称となっているので、図５（ｃ）に示すように、長辺１８２と長辺１８２’は一致する（重なる）。同様に、平板状部材１８０の長辺１８４と平板状部材１８０’の長辺１８４’は、長手方向中央点１８４ａ（１８４’ａ）に関して点対称となっているので、図５（ｃ）に示すように、長辺１８４と長辺１８４’は一致する（重なる）。従って、１枚の鋼板（又は、ロール状に巻かれたロール状鋼板）１００から複数の平板状部材１８０を切り出す場合、図５（ｃ）に示すように、２枚の平板状部材１８０，１８０’の長辺同士１８２，１８２’を一致させたものを一組として、この一組を連続して鋼板１００から同時に切断する。この場合、一組の平板状部材１８０，１８０’の間には、スクラップが発生せず、一組とこの一組に隣接する他の一組の間においても、長辺１８４’と長辺１８４が一致するので、これらの間にもスクラップは発生しない。また、一組の平板状部材１８０，１８０’の短辺１８６，１８８’はほぼ直線状となり、短辺１８８，１８６’もほぼ直線状となるので、適宜のサイズの鋼板１００を使用することにより、第２分割部１７０の長手方向両端の外側におけるスクラップをいっそう低減でき、いっそう歩留まりが向上する。なお、図３、図４の場合についても実施例１と同様である。   By rotating the flat plate member 180 about the longitudinal center point 182a by 180 °, a flat plate member 180 'is obtained as shown by a two-dot chain line in FIG. 5B. Since the long side 182 of the flat plate member 180 and the long side 182 ′ of the flat plate member 180 ′ are symmetric with respect to the longitudinal center point 182a (182′a), as shown in FIG. The long side 182 and the long side 182 ′ coincide (overlap). Similarly, the long side 184 of the flat plate member 180 and the long side 184 ′ of the flat plate member 180 ′ are point-symmetric with respect to the longitudinal center point 184a (184′a), and therefore are shown in FIG. As described above, the long side 184 and the long side 184 ′ coincide (overlap). Accordingly, when a plurality of flat plate members 180 are cut out from a single steel plate (or a rolled steel plate wound in a roll shape) 100, as shown in FIG. 5C, the two flat plate members 180 and 180 are cut. A set of 'long sides 182 and 182' matched with each other is taken as a set, and the set is continuously cut from the steel plate 100 at the same time. In this case, no scrap is generated between the pair of flat plate members 180 and 180 ′, and the long side 184 ′ and the long side 184 are between one set and another set adjacent to the set. Therefore, no scrap is generated between them. In addition, since the short sides 186 and 188 ′ of the pair of flat plate members 180 and 180 ′ are substantially linear, and the short sides 188 and 186 ′ are also substantially linear, by using the steel plate 100 of an appropriate size. In addition, scrap on the outer sides of both ends in the longitudinal direction of the second divided portion 170 can be further reduced, and the yield is further improved. Note that the cases of FIGS. 3 and 4 are the same as those of the first embodiment.

図６を参照して、本発明の実施例６を説明する。図６は、図５に示す第２分割部をスクラップ無しで製造できる手法を示す模式図であり、（ａ）は、鋼板からスクラップ無しに複数の平板状部材原材料を切断する様子を示し、（ｂ）は、１つの平板状部材原材料をエッジベンド法によって平板状部材に加工する様子を示し、（ｃ）は、完成した平板状部材を示し、（ｄ）は、平板状部材をプレスして作製された第２分割部を示す。   A sixth embodiment of the present invention will be described with reference to FIG. FIG. 6 is a schematic diagram showing a method for producing the second divided portion shown in FIG. 5 without scrap, and (a) shows a state in which a plurality of flat plate member raw materials are cut from a steel plate without scrap. b) shows how one flat member raw material is processed into a flat member by the edge bend method, (c) shows a completed flat member, and (d) is produced by pressing the flat member. The 2nd division part made is shown.

平板状部材１８０を作製するに際しては、先ず、キックアップ傾斜部１５２の傾斜が緩やかになるように平板状部材１８０を伸ばした伸ばし形状２８０を得る。この場合、伸ばし形状２８０の一対の長辺２８２，２８４はそれぞれ、その長手方向中央点２８２ａ，２８４ａに関して点対称になるようにすると共に、一対の長辺２８２，２８４と一対の短辺２８６，２８８の成す角度（四隅の角度）は９０°になるようにする。このようにして作製した伸ばし形状２８０の長辺２８２と、この伸ばし形状２８０を長手方向中央点２８２ａを中心にして１８０°回転させた形状に相当する他の一つの伸ばし形状２８０’の長辺２８２’とを接触させた（一致させた）形状をもつ２つの伸ばし形状部材を一組とし、この一組を、図６（ａ）に示すように、鋼板１００から同時に切断する。この切断では、一枚の鋼板１００に代えて、ロール状に巻かれたロール状鋼板を使用し、上記の一組をロール材から連続して作製することにより、スクラップがほとんど発生しないように伸ばし形状２８０を作製できる。   In producing the flat member 180, first, an elongated shape 280 obtained by extending the flat member 180 so that the inclination of the kick-up inclined portion 152 becomes gentle is obtained. In this case, the pair of long sides 282 and 284 of the elongated shape 280 are point-symmetric with respect to the longitudinal center points 282a and 284a, and the pair of long sides 282 and 284 and the pair of short sides 286 and 288 are provided. The angle formed by (the angles of the four corners) is set to 90 °. The long side 282 of the elongated shape 280 thus produced, and the long side 282 of another elongated shape 280 ′ corresponding to a shape obtained by rotating the elongated shape 280 by 180 ° about the longitudinal center point 282a. As shown in FIG. 6 (a), a pair of two elongated members having a shape in contact with (matched) is cut at the same time from the steel plate 100. In this cutting, instead of a single steel plate 100, a rolled steel plate wound in a roll shape is used, and the above set is continuously produced from the roll material, so that it is stretched so that almost no scrap is generated. Shape 280 can be made.

上述のようにして作製した伸ばし形状２８０を、図６（ｂ）に示すように、プレス金型３００を使用して面内方向に曲げる（平板状部材１８０に加工する）ことにより、図６（ｃ）に示すように平板形状の平板形状部材１８０を作製する。その後は、実施例２と同様に平板状部材１８０を周知のプレス成型方法でプレスすることにより、図６（ｄ）に示すように第２分割部１７０が得られる。   As shown in FIG. 6 (b), the elongated shape 280 produced as described above is bent in the in-plane direction using a press die 300 (processed into a flat plate member 180). As shown in c), a flat plate member 180 having a flat plate shape is produced. After that, the second divided portion 170 is obtained as shown in FIG. 6D by pressing the flat plate member 180 by a known press molding method as in the second embodiment.

上記したサイドメンバ３０は、その長手方向に分割された複数の分割部を接合しているので、各分割部ごとに最適な材質や板厚を使用でき、サイドメンバ３０の軽量化や更なる材料費の節減が可能となる。   Since the above-described side member 30 joins a plurality of divided parts divided in the longitudinal direction, the optimum material and plate thickness can be used for each divided part, and the side member 30 can be reduced in weight and further materials. Costs can be saved.

本発明の実施例１のサイドメンバを示す斜視図である。It is a perspective view which shows the side member of Example 1 of this invention. （ａ）は、図１に示すサイドメンバの第２分割部を示す斜視図であり、（ｂ）は、第２分割部を展開した展開形状を示す斜視図であり、（ｃ）は、第２分割部を展開した展開形状を材料取りする様子を示す斜視図である。(A) is a perspective view which shows the 2nd division part of the side member shown in FIG. 1, (b) is a perspective view which shows the expansion | deployment shape which expand | deployed the 2nd division part, (c) It is a perspective view which shows a mode that material of the expansion | deployment shape which expand | deployed the 2 division part is taken. （ａ）は、それぞれがコ字状の横断面をもつ２つの部材を溶接して一つにした矩形横断面のサイドメンバを示す断面図であり、（ｂ）は、コ字状の横断面をもつ部材の隅部にＬ字状の横断面をもつ補強部材を溶接したサイドメンバを示す断面図である。(A) is sectional drawing which shows the side member of the rectangular cross section which welded two members each having a U-shaped cross section, and (b) is a U-shaped cross section. It is sectional drawing which shows the side member which welded the reinforcement member which has an L-shaped cross section in the corner part of a member which has. ２つのキックダウン部が形成されたサイドメンバを示す斜視図である。It is a perspective view which shows the side member in which two kick-down parts were formed. （ａ）は、２つの長辺がともにその長手方向中央点に関して点対称である第２分割部を示す斜視図であり、（ｂ）は、（ａ）の第２分割部を展開した展開形状を示す斜視図であり、（ｃ）は、（ａ）の第２分割部を展開した展開形状を材料取りする様子を示す斜視図である。(A) is a perspective view showing a second divided portion in which two long sides are both point-symmetric with respect to the longitudinal center point, and (b) is a developed shape in which the second divided portion in (a) is developed. (C) is a perspective view which shows a mode that material of the expansion | deployment shape which expand | deployed the 2nd division part of (a) is taken. （ａ）は、鋼板からスクラップ無しに複数の平板状部材原材料を切断する様子を示し、（ｂ）は、１つの平板状部材原材料をエッジベンド法によって平板状部材に加工する様子を示し、（ｃ）は、完成した平板状部材を示し、（ｄ）は、平板状部材をプレスして作製された第２分割部を示す。(A) shows a state in which a plurality of flat plate member raw materials are cut from a steel plate without scrap, (b) shows a state in which one flat member raw material is processed into a flat member by an edge bend method, (c ) Shows the completed flat plate member, and (d) shows the second divided portion produced by pressing the flat plate member. キックアップ部を備えたサイドメンバの一例を示す斜視図である。It is a perspective view which shows an example of the side member provided with the kick-up part. 図７に示すサイドメンバを製造する際の一工程を示す斜視図であり、展開状態のサイドメンバを鋼板から切り出す工程を示す。It is a perspective view which shows 1 process at the time of manufacturing the side member shown in FIG. 7, and shows the process of cutting out the developed side member from a steel plate. 材料取りに際しての歩留りを向上する従来の技術を示す模式図である。It is a schematic diagram which shows the prior art which improves the yield at the time of material picking.

符号の説明Explanation of symbols

３０ サイドメンバ
４０ 長手方向中央部
５０ 第１キックアップ部
５２ 第１キックアップ傾斜部
５４ 第１キックアップ直線部
６０ 第２キックアップ部
６２ 第２キックアップ傾斜部
６４ 第２キックアップ直線部
７０ 第２分割部
８０ 平板状部材
８２，８４ 長辺
８２ａ，８２’ａ 長手方向中央点 30 Side member 40 Longitudinal central portion 50 First kick-up portion 52 First kick-up inclined portion 54 First kick-up straight portion 60 Second kick-up portion 62 Second kick-up inclined portion 64 Second kick-up straight portion 70 First Two divided portions 80 Flat members 82, 84 Long sides 82a, 82'a Longitudinal center point

Claims (8)

直線状に延びる長手方向中央部と、該長手方向中央部の長手方向一端から上方に傾斜しながら延びるキックアップ傾斜部と、該キックアップ傾斜部の上端から直線状に延びるキックアップ直線部とが形成されて横断面がコ字状の横断面コ字状部材を備えたサイドメンバにおいて、
前記横断面コ字状部材は、
前記長手方向中央部と前記キックアップ直線部とが前記キックアップ傾斜部を挟んで同じ長さの位置で分割された分割部を備えたものであり、
該分割部は、
前記コ字状を展開して得られる一対の長辺及び短辺をもつ平板状部材の少なくとも１つの長辺が、その長手方向中央点に関して点対称となっているものであることを特徴とするサイドメンバ。 A longitudinally central portion extending linearly, a kickup inclined portion extending while being inclined upward from one longitudinal end of the longitudinal central portion, and a kickup linear portion extending linearly from the upper end of the kickup inclined portion. In the side member that is formed and has a U-shaped member having a U-shaped cross section,
The cross-sectional U-shaped member is
The longitudinal center part and the kick-up straight part are provided with a split part that is split at the same length position across the kick-up inclined part,
The dividing unit is
At least one long side of the flat plate member having a pair of long sides and short sides obtained by developing the U-shape is point-symmetric with respect to the longitudinal center point. Side member. 直線状に延びる長手方向中央部と、該長手方向中央部の長手方向一端から下方に傾斜しながら延びるキックダウン傾斜部と、該キックダウン傾斜部の下端から直線状に延びるキックダウン直線部とが形成されて横断面がコ字状の横断面コ字状部材を備えたサイドメンバにおいて、
前記横断面コ字状部材は、
前記長手方向中央部と前記キックダウン直線部とが前記キックダウン傾斜部を挟んで同じ長さの位置で分割された分割部を備えたものであり、
該分割部は、
前記コ字状を展開して得られる一対の長辺及び短辺をもつ平板状部材の少なくとも１つの長辺が、その長手方向中央点に関して点対称となっているものであることを特徴とするサイドメンバ。 A longitudinally central portion extending linearly, a kickdown inclined portion extending while being inclined downward from one longitudinal end of the longitudinal central portion, and a kickdown linear portion extending linearly from the lower end of the kickdown inclined portion In the side member that is formed and has a U-shaped member having a U-shaped cross section,
The cross-sectional U-shaped member is
The longitudinal central portion and the kick-down straight portion are provided with a split portion that is split at the same length across the kick-down inclined portion,
The dividing unit is
At least one long side of the flat plate member having a pair of long sides and short sides obtained by developing the U-shape is point-symmetric with respect to the longitudinal center point. Side member. 前記分割部は、
前記コ字状を展開して得られる一対の長辺及び短辺をもつ平板状部材の一対の長辺それぞれが、その長手方向中央点に関して点対称となっているものであることを特徴とする請求項１又は２に記載のサイドメンバ。 The dividing unit is
Each of the pair of long sides of the plate-like member having a pair of long sides and short sides obtained by developing the U-shape is point-symmetric with respect to the longitudinal center point. The side member according to claim 1 or 2. 直線状に延びる長手方向中央部と、該長手方向中央部の長手方向一端から上方に傾斜しながら延びるキックアップ傾斜部と、該キックアップ傾斜部の上端から直線状に延びるキックアップ直線部とが形成されて横断面がコ字状の横断面コ字状部材を備えたサイドメンバを製造するサイドメンバ製造方法において、
前記キックアップ傾斜部を挟んで前記長手方向中央部と前記キックアップ直線部とが同じ長さになるように前記横断面コ字状部材を分割し、この分割したものを展開することにより形成される一対の長辺及び短辺をもつ平板形状であって、且つ、この一対の長辺のうち少なくとも１つの長辺がその長手方向中央点に関して点対称となる平板形状を得、
１つの前記平板形状の１つの前記長辺と、前記長手方向中央点を中心にして他の１つの前記平板形状を１８０°回転させた他の１つの前記平板形状の１つの前記長辺とを接触させた形状をもつ２つの平面形状部材を被加工材から同時に切断し、
この切断によって得られた平板形状部材をプレス加工することにより前記横断面コ字状部材の一部分を作製し、
この一部分を備えたサイドメンバを製造することを特徴とするサイドメンバ製造方法。 A longitudinally central portion extending linearly, a kickup inclined portion extending while being inclined upward from one longitudinal end of the longitudinal central portion, and a kickup linear portion extending linearly from the upper end of the kickup inclined portion. In a side member manufacturing method for manufacturing a side member that is formed and has a U-shaped member having a U-shaped cross section,
It is formed by dividing the U-shaped member in cross section so that the longitudinal center portion and the kick-up straight line portion have the same length across the kick-up inclined portion, and developing the divided portion. A flat plate shape having a pair of long sides and short sides, and at least one long side of the pair of long sides is point-symmetric with respect to the longitudinal center point;
One long side of one flat plate shape and one long side of the other flat plate shape obtained by rotating the other flat plate shape by 180 degrees around the longitudinal center point. Two plane-shaped members having a contacted shape are simultaneously cut from the workpiece,
A part of the U-shaped cross-section member is produced by pressing a flat plate-shaped member obtained by this cutting,
A side member manufacturing method comprising manufacturing a side member provided with the part. 直線状に延びる長手方向中央部と、該長手方向中央部の長手方向一端から下方に傾斜しながら延びるキックダウン傾斜部と、該キックダウン傾斜部の下端から直線状に延びるキックダウン直線部とが形成されて横断面がコ字状の横断面コ字状部材を備えたサイドメンバを製造するサイドメンバ製造方法において、
前記キックダウン傾斜部を挟んで前記長手方向中央部と前記キックダウン直線部とが同じ長さになるように前記横断面コ字状部材を分割し、この分割したものを展開することにより形成される一対の長辺及び短辺をもつ平板形状であって、且つ、この一対の長辺のうち少なくとも１つの長辺がその長手方向中央点に関して点対称となる平板形状を得、
１つの前記平板形状の１つの前記長辺と、前記長手方向中央点を中心にして他の１つの前記平板形状を１８０°回転させた他の１つの前記平板形状の１つの前記長辺とを接触させた形状をもつ２つの平面形状部材を被加工材から同時に切断し、
この切断によって得られた平板形状部材をプレス加工することにより前記横断面コ字状部材の一部分を作製し、
この一部分を備えたサイドメンバを製造することを特徴とするサイドメンバ製造方法。 A longitudinally central portion extending linearly, a kickdown inclined portion extending while being inclined downward from one longitudinal end of the longitudinal central portion, and a kickdown linear portion extending linearly from the lower end of the kickdown inclined portion In a side member manufacturing method for manufacturing a side member that is formed and has a U-shaped member having a U-shaped cross section,
The transverse section U-shaped member is divided so that the central portion in the longitudinal direction and the kick-down straight line portion have the same length across the kick-down inclined portion, and the divided portion is developed. A flat plate shape having a pair of long sides and short sides, and at least one long side of the pair of long sides is point-symmetric with respect to the longitudinal center point;
One long side of one flat plate shape and one long side of the other flat plate shape obtained by rotating the other flat plate shape by 180 degrees around the longitudinal center point. Two plane-shaped members having a contacted shape are simultaneously cut from the workpiece,
A part of the U-shaped cross-section member is produced by pressing a flat plate-shaped member obtained by this cutting,
A side member manufacturing method comprising manufacturing a side member provided with the part. 直線状に延びる長手方向中央部と、該長手方向中央部の長手方向一端から上方に傾斜しながら延びるキックアップ傾斜部と、該キックアップ傾斜部の上端から直線状に延びるキックアップ直線部とが形成されて横断面がコ字状の横断面コ字状部材を備えたサイドメンバを製造するサイドメンバ製造方法において、
前記キックアップ傾斜部を挟んで前記長手方向中央部と前記キックアップ直線部とが同じ長さになるように前記横断面コ字状部材を分割し、この分割したものを展開することにより形成される一対の長辺及び短辺をもつ平板形状であって、且つ、この一対の長辺のうち少なくとも１つの長辺がその長手方向中央点に関して点対称となる平板形状を得、
前記キックアップ傾斜部の傾斜が緩やかになるように前記平板形状を伸ばした伸ばし形状を得、
１つの前記伸ばし形状の１つの前記長辺と、前記長手方向中央点を中心にして他の１つの前記伸ばし形状を１８０°回転させた他の１つの前記伸ばし形状の１つの前記長辺とを接触させた形状をもつ２つの伸ばし形状部材を被加工材から同時に切断し、
この切断によって得られた伸ばし形状部材を面内方向に曲げることにより、前記平板形状の平板形状部材を作製し、
作製された平板形状部材をプレス加工することにより前記横断面コ字状部材の一部分を作製し、
この一部分を備えたサイドメンバを製造することを特徴とするサイドメンバ製造方法。 A longitudinally central portion extending linearly, a kickup inclined portion extending while being inclined upward from one longitudinal end of the longitudinal central portion, and a kickup linear portion extending linearly from the upper end of the kickup inclined portion. In a side member manufacturing method for manufacturing a side member that is formed and has a U-shaped member having a U-shaped cross section,
It is formed by dividing the U-shaped member in cross section so that the longitudinal center portion and the kick-up straight line portion have the same length across the kick-up inclined portion, and developing the divided portion. A flat plate shape having a pair of long sides and short sides, and at least one long side of the pair of long sides is point-symmetric with respect to the longitudinal center point;
Obtain an elongated shape by extending the flat plate shape so that the inclination of the kick-up inclined portion becomes gentle,
One long side of one extended shape and one long side of another extended shape obtained by rotating the other extended shape by 180 ° around the longitudinal center point Cut two stretch-shaped members with contacted shapes from the workpiece simultaneously,
By bending the elongated member obtained by this cutting in the in-plane direction, the flat plate member of the flat plate shape is produced,
A portion of the U-shaped cross-sectional member is produced by pressing the produced flat plate-shaped member,
A side member manufacturing method comprising manufacturing a side member provided with the part. 直線状に延びる長手方向中央部と、該長手方向中央部の長手方向一端から下方に傾斜しながら延びるキックダウン傾斜部と、該キックダウン傾斜部の下端から直線状に延びるキックダウン直線部とが形成されて横断面がコ字状の横断面コ字状部材を備えたサイドメンバを製造するサイドメンバ製造方法において、
前記キックダウン傾斜部を挟んで前記長手方向中央部と前記キックダウン直線部とが同じ長さになるように前記横断面コ字状部材を分割し、この分割したものを展開することにより形成される一対の長辺及び短辺をもつ平板形状であって、且つ、この一対の長辺のうち少なくとも１つの長辺がその長手方向中央点に関して点対称となる平板形状を得、
前記キックダウン傾斜部の傾斜が緩やかになるように前記平板形状を伸ばした伸ばし形状を得、
１つの前記伸ばし形状の１つの前記長辺と、前記長手方向中央点を中心にして他の１つの前記伸ばし形状を１８０°回転させた他の１つの前記伸ばし形状の１つの前記長辺とを接触させた形状をもつ２つの伸ばし形状部材を被加工材から同時に切断し、
この切断によって得られた伸ばし形状部材を面内方向に曲げることにより、前記平板形状の平板形状部材を作製し、
作製された平板形状部材をプレス加工することにより前記横断面コ字状部材の一部分を作製し、
この一部分を備えたサイドメンバを製造することを特徴とするサイドメンバ製造方法。 A longitudinally central portion extending linearly, a kickdown inclined portion extending while being inclined downward from one longitudinal end of the longitudinal central portion, and a kickdown linear portion extending linearly from the lower end of the kickdown inclined portion In a side member manufacturing method for manufacturing a side member that is formed and has a U-shaped member having a U-shaped cross section,
The transverse section U-shaped member is divided so that the central portion in the longitudinal direction and the kick-down straight line portion have the same length across the kick-down inclined portion, and the divided portion is developed. A flat plate shape having a pair of long sides and short sides, and at least one long side of the pair of long sides is point-symmetric with respect to the longitudinal center point;
Obtain an elongated shape by extending the flat plate shape so that the inclination of the kick-down inclined portion becomes gentle,
One long side of one extended shape and one long side of the other extended shape obtained by rotating the other extended shape by 180 ° around the longitudinal center point Cut two stretch-shaped members with contacted shapes from the workpiece simultaneously,
By bending the elongated member obtained by this cutting in the in-plane direction, the flat plate member of the flat plate shape is produced,
A portion of the U-shaped cross-sectional member is produced by pressing the produced flat plate-shaped member,
A side member manufacturing method comprising manufacturing a side member provided with the part. 前記被加工材として、ロール状に巻かれたロール状鋼板を用いることを特徴とする請求項４から７までのうちのいずれか一項に記載のサイドメンバ製造方法。 The side member manufacturing method according to any one of claims 4 to 7, wherein a rolled steel plate wound in a roll shape is used as the workpiece.
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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS579677U (en) * 1980-06-18 1982-01-19
JPS6250282A (en) * 1985-08-30 1987-03-04 Mitsubishi Motors Corp Shaping method for material for frame side member
JPH01140913A (en) * 1987-11-27 1989-06-02 Mazda Motor Corp Method for cutting out sheet metal equal in length
JP2000128019A (en) * 1998-10-20 2000-05-09 Toyota Motor Corp Manufacturing method of tapered body frame structural body for vehicle
JP2007168713A (en) * 2005-12-26 2007-07-05 Mitsubishi Fuso Truck & Bus Corp Cab structure of cab over type vehicle
JP2007253887A (en) * 2006-03-24 2007-10-04 Press Kogyo Co Ltd Frame joint

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS579677U (en) * 1980-06-18 1982-01-19
JPS6250282A (en) * 1985-08-30 1987-03-04 Mitsubishi Motors Corp Shaping method for material for frame side member
JPH01140913A (en) * 1987-11-27 1989-06-02 Mazda Motor Corp Method for cutting out sheet metal equal in length
JP2000128019A (en) * 1998-10-20 2000-05-09 Toyota Motor Corp Manufacturing method of tapered body frame structural body for vehicle
JP2007168713A (en) * 2005-12-26 2007-07-05 Mitsubishi Fuso Truck & Bus Corp Cab structure of cab over type vehicle
JP2007253887A (en) * 2006-03-24 2007-10-04 Press Kogyo Co Ltd Frame joint

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