JP7420370B2 - buckling member - Google Patents

buckling member Download PDF

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JP7420370B2
JP7420370B2 JP2019206759A JP2019206759A JP7420370B2 JP 7420370 B2 JP7420370 B2 JP 7420370B2 JP 2019206759 A JP2019206759 A JP 2019206759A JP 2019206759 A JP2019206759 A JP 2019206759A JP 7420370 B2 JP7420370 B2 JP 7420370B2
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buckling
general
cap
cylinder axis
cylindrical member
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JP2021080955A (en
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正夫 寺岡
有範 酒巻
一真 石原
佑汰 阿部
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Fuji Latex Co Ltd
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Fuji Latex Co Ltd
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E30/00—Energy generation of nuclear origin
    • Y02E30/30—Nuclear fission reactors

Description

本発明は、衝撃吸収に供する座屈部材に関する。 The present invention relates to a buckling member used for shock absorption.

従来、座屈部材として特許文献１に記載のものがある。この座屈部材は、核燃料棒に採用されたものであり、円筒体の中央に切欠き溝や透孔を設けたものである。 Conventionally, there is a buckling member described in Patent Document 1. This buckling member is used in nuclear fuel rods, and has a notched groove or a through hole in the center of a cylindrical body.

かかる座屈部材は、切欠き溝等が円筒体の外周に形成されているため、座屈荷重の僅かな偏りで切欠き溝の径方向片側の変形が進行し、座屈部材単体では容易に折れ曲がるような座屈変形になるという問題があった。 In such a buckling member, a notch groove etc. is formed on the outer periphery of the cylindrical body, so a slight deviation in the buckling load will cause deformation of one side of the notch groove in the radial direction, which is easily caused by the buckling member alone. There was a problem of buckling deformation such as bending.

実公昭５５－４４２９４号公報Publication No. 55-44294

解決しようとする問題点は、座屈部材単体では容易に折れ曲がるような座屈変形になる点である。 The problem to be solved is that a single buckling member is easily buckled and deformed by bending.

本願発明は、座屈部材単体で座屈変形を安定させ、安定したエネルギー吸収を可能とするために、筒部材の筒軸方向の中間部に一般部に対して相対的な薄肉の座屈部を周回状に又は周方向所定間隔で備えた座屈部材であって、前記座屈部は、前記筒部材の内周面が径方向へ凹形状の凹部を備え、前記内周面は、前記座屈部の前記筒軸方向の両側で前記凹部と前記一般部との間に前記座屈部に働く圧縮荷重により前記凹部に曲げ荷重を働かせて前記圧縮荷重及び前記曲げ荷重により前記座屈部の筒軸方向の中間部が外周方向へ膨らむように変形させるアールを備えたことを特徴とする。 In order to stabilize buckling deformation with a single buckling member and enable stable energy absorption, the present invention provides a buckling portion that is thin relative to the general portion in the middle portion of the cylindrical member in the axial direction. The buckling member is provided with a circular shape or a predetermined interval in the circumferential direction, and the buckling part is provided with a concave portion having a concave shape in the radial direction on the inner circumferential surface of the cylindrical member, and the inner circumferential surface is A bending load is applied to the concave part by a compressive load acting on the buckling part between the concave part and the general part on both sides of the buckling part in the cylinder axis direction, and the compressive load and the bending load cause the buckling part It is characterized by having a radius that deforms the middle part in the axial direction of the cylinder so that it bulges in the outer circumferential direction .

本願発明は、上記構成であるから、筒部材が筒軸方向から座屈荷重を受けると荷重が座屈部に集中させることができる。座屈部に働く荷重は内周面の凹部に圧縮荷重として働くと共に外周方向への曲げ荷重として働き、座屈部が筒部材の外方へ膨らむように変形することができる。 Since the present invention has the above configuration, when the cylindrical member receives a buckling load from the direction of the cylindrical axis, the load can be concentrated on the buckling portion. The load acting on the buckling portion acts as a compressive load on the recessed portion of the inner circumferential surface and as a bending load in the outer circumferential direction, allowing the buckling portion to deform so as to bulge outward of the cylindrical member.

従って、筒部材が座屈変形するとき、変形部分が座屈時の座となり、座屈変形を安定させ、吸収荷重の設定も容易となる。 Therefore, when the cylindrical member undergoes buckling deformation, the deformed portion serves as a seat at the time of buckling, thereby stabilizing the buckling deformation and making it easy to set the absorption load.

座屈部材を取り付けた状態の断面図である。（実施例１）It is a sectional view of the state where a buckling member is attached. (Example 1) 座屈部材の座屈状態を示す説明図である。（実施例１）It is an explanatory view showing a buckling state of a buckling member. (Example 1) 座屈部材の断面図である。（実施例２）It is a sectional view of a buckling member. (Example 2) 座屈部材の断面図である。（実施例３）It is a sectional view of a buckling member. (Example 3) 座屈部材の断面図である。（実施例４）It is a sectional view of a buckling member. (Example 4) 座屈部材の断面図である。（実施例５）It is a sectional view of a buckling member. (Example 5) 座屈部材の断面図である。（実施例６）It is a sectional view of a buckling member. (Example 6) 座屈部材の断面図である。（実施例７）It is a sectional view of a buckling member. (Example 7)

本発明は、座屈部材単体で座屈変形を安定させ、安定したエネルギー吸収を可能とするという目的を、以下のように実現した。 The present invention has achieved the object of stabilizing buckling deformation with a single buckling member and enabling stable energy absorption as follows.

図１のように、筒部材３の筒軸方向の中間部に相対的な薄肉の座屈部５、７、９を周回状に備えた座屈部材１であって、座屈部５、７、９は、筒部材３の内周面が凹形状である。 As shown in FIG. 1, a buckling member 1 is provided with relatively thin buckling portions 5, 7, and 9 in a circumferential manner at an intermediate portion of a cylindrical member 3 in the direction of the cylinder axis. , 9, the inner peripheral surface of the cylindrical member 3 is concave.

前記座屈部５、７、９は、筒軸方向に複数段備えた。 The buckling portions 5, 7, and 9 were provided in multiple stages in the cylinder axis direction.

図８のように、複数段の座屈部５、７は、相互に厚みが異なる。 As shown in FIG. 8, the multiple stages of buckling parts 5 and 7 have different thicknesses.

前記複数段の座屈部５、７は、筒軸方向の幅が相互に異なる。 The plurality of stages of buckling portions 5 and 7 have different widths in the cylinder axis direction.

図３～図８のように、前記筒部材３は、筒軸方向両側の開口部の一方に衝撃を受けるためのキャップ２５を接合し他方に取付側に取り付けるためのボトムキャップ２７を接合した。 As shown in FIGS. 3 to 8, the cylinder member 3 has a cap 25 for receiving an impact attached to one of the openings on both sides in the axial direction of the cylinder, and a bottom cap 27 for attaching to the mounting side to the other side.

図１は、座屈部材を取り付けた状態の断面図である。 FIG. 1 is a cross-sectional view of the buckling member attached.

前記座屈部材１は、筒部材３の筒軸方向の中間部に相対的な薄肉の座屈部５、７、９が周回状に連続するように形成されている。 The buckling member 1 is formed such that relatively thin buckling portions 5, 7, and 9 are continuous in a circumferential manner at the middle portion of the cylindrical member 3 in the axial direction.

前記筒部材３は、アルミパイプが用いられ、円筒状となっている。なお、筒部材３の材質および筒段面形状は特に限定されず、座屈によりエネルギー吸収ができればよい。従って、筒部材３をスチール、その他で形成することもできる。また、筒部材３を多角形断面等に形成することもできる。 The cylindrical member 3 is made of aluminum pipe and has a cylindrical shape. Note that the material of the cylindrical member 3 and the shape of the cylindrical stepped surface are not particularly limited, as long as energy can be absorbed by buckling. Therefore, the cylindrical member 3 can also be made of steel or other materials. Further, the cylindrical member 3 can also be formed to have a polygonal cross section or the like.

前記座屈部５、７、９は、筒部材３に筒軸方向で３段形成されている。座屈部５、７、９の段数は任意であり、エネルギー吸収状況に応じて増減することができる。座屈部５、７、９は、筒部材３の内周面が径方向へ凹形状の凹部１０、１２、１４を備えている。座屈部５、７、９は、一般部１１、１３、１５、１７間に形成されている。座屈部５、７、９の筒軸方向での数は、特に限定はされないが、座屈部５、７、９が外方へ膨らみ、例えばフランジ状等に変形できる程度に制限される。 The buckling portions 5, 7, and 9 are formed in three stages on the cylinder member 3 in the cylinder axis direction. The number of stages of the buckling parts 5, 7, and 9 is arbitrary and can be increased or decreased depending on the energy absorption situation. The buckling portions 5, 7, and 9 include recesses 10, 12, and 14 that are concave in the radial direction on the inner circumferential surface of the cylindrical member 3. The buckling parts 5, 7, and 9 are formed between the general parts 11, 13, 15, and 17. The number of buckling parts 5, 7, and 9 in the cylinder axis direction is not particularly limited, but is limited to an extent that allows buckling parts 5, 7, and 9 to bulge outward and deform, for example, into a flange shape.

前記座屈部５、７、９の肉厚は、筒軸方向にほぼ均一に形成されている。座屈部５、７、９の肉厚は、一般部１１、１３、１５、１７の肉厚に対し１／２程度に設定されている。座屈部５、７、９の肉厚は、筒部材３を折れ曲がるような座屈変形をさせるもので無ければよく、一般部１１、１３、１５、１７に対してより薄く形成することもできる。座屈部５、７、９の肉厚を筒軸方向で不均一とし、例えば一般部１１、１３、１５、１７に対してより薄く形成すると共に筒軸方向の中間部を相対的にさらに薄く形成する構成にすることもできる。 The wall thicknesses of the buckling portions 5, 7, and 9 are substantially uniform in the axial direction of the cylinder. The wall thickness of the buckling portions 5, 7, and 9 is set to about 1/2 of the wall thickness of the general portions 11, 13, 15, and 17. The wall thickness of the buckling portions 5, 7, and 9 does not need to cause buckling deformation such as bending the cylindrical member 3, and may be formed thinner than the general portions 11, 13, 15, and 17. . The wall thickness of the buckling parts 5, 7, 9 is made non-uniform in the direction of the cylinder axis, for example, they are made thinner than the general parts 11, 13, 15, 17, and the intermediate part in the direction of the cylinder axis is made relatively thinner. It is also possible to form a configuration.

前記座屈部５、７、９は、一般部１３、１５の筒軸方向の幅のほぼ倍の幅に形成されている。座屈部５、７、９は、外周側へ膨らむように変形させることを考慮すると筒軸方向の幅をあまり小さくし或いは大きくすることはできないが、膨らむように変形できる限りにおいて筒軸方向の幅を小さくし或いは大きくすることができる。両端の一般部１１、１７の筒軸方向の寸法の設定は、荷重伝達ができる限り自由である。 The buckling portions 5, 7, and 9 are formed to have a width approximately twice the width of the general portions 13, 15 in the cylinder axis direction. Considering that the buckling parts 5, 7, and 9 are deformed so as to bulge toward the outer periphery, the width in the axial direction of the cylinder cannot be made too small or large. The width can be made smaller or larger. The dimensions of the general portions 11 and 17 at both ends in the axial direction of the cylinder can be set freely as long as the load can be transmitted.

前記座屈部５、７、９と前記一般部１１、１３、１５、１７との間は、内周面においてアール１９が形成されている。このアールによりこの部分での応力集中を避け、座屈部５、７、９の筒軸方向の中間部を外周側へ変位させるようにしている。 A radius 19 is formed on the inner peripheral surface between the buckling portions 5, 7, 9 and the general portions 11, 13, 15, 17. This radius avoids stress concentration in this portion, and allows the intermediate portions of the buckling portions 5, 7, and 9 in the cylinder axis direction to be displaced toward the outer circumferential side.

前記座屈部材１は、衝撃吸収をすべき取付側２１に形成した穴２３に一般部１７が圧入等により固定される。 The general portion 17 of the buckling member 1 is fixed by press-fitting or the like into a hole 23 formed on the mounting side 21 that is to absorb shock.

前記取付側２１に取り付けられた座屈部材１対し衝突荷重が入力されると座屈部材１の一般部１１が荷重を受け、一般部１１から座屈部５、一般部１３、座屈部７、一般部１５、座屈部９、一般部１７へと伝達される。 When a collision load is input to the buckling member 1 attached to the mounting side 21, the general portion 11 of the buckling member 1 receives the load, and from the general portion 11 to the buckling portion 5, the general portion 13, and the buckling portion 7 , the general portion 15, the buckling portion 9, and the general portion 17.

前記一般部１７へ伝達された荷重が取付側２１で受けられると反力が一般部１７から座屈部９、一般部１５、座屈部７、一般部１３、座屈部５、一般部１１へと伝達される。 When the load transmitted to the general portion 17 is received by the mounting side 21, a reaction force is generated from the general portion 17 to the buckling portion 9, the general portion 15, the buckling portion 7, the general portion 13, the buckling portion 5, and the general portion 11. transmitted to.

このような荷重伝達により相対的に薄肉の座屈部５、７、９が圧縮力を受け、図２のように筒軸方向の中間部が外周方向へ膨らむように、例えばフランジ状等に変形する。 Due to this load transmission, the relatively thin buckled parts 5, 7, and 9 receive compressive force, and as shown in FIG. do.

このような外周側へのフランジ状等の変形は、周方向で同時進行するが、周方向の一部分が先行して変形してもその部分を支持点として順次周方向に進行し、図２のような周方向にほぼ均一な変形となる。 Such deformation such as a flange shape toward the outer circumferential side progresses simultaneously in the circumferential direction, but even if a portion in the circumferential direction deforms first, the deformation progresses sequentially in the circumferential direction using that portion as a support point. This results in almost uniform deformation in the circumferential direction.

［作用効果］
本発明実施例の座屈部材１は、前記筒部材３の筒軸方向の中間部に相対的な薄肉の座屈部５、７、９を周回状に備えた座屈部材１であって、座屈部５、７、９は、筒部材３の内周面が径方向に凹形状の凹部１０、１２、１４を備えた。 [Effect]
The buckling member 1 according to the embodiment of the present invention is a buckling member 1 that includes relatively thin buckling portions 5, 7, and 9 in a circumferential manner at the middle portion of the cylindrical member 3 in the axial direction, and includes: The buckling portions 5, 7, and 9 include recesses 10, 12, and 14 in which the inner circumferential surface of the cylindrical member 3 is concave in the radial direction.

従って、衝撃吸収時に座屈部５、７、９に圧縮荷重が働くと凹部１０、１２、１４にアール１９を介して曲げ荷重としても働く。これら圧縮荷重及び曲げ荷重により座屈部５、７、９の筒軸方向の中間部が外周方向へ膨らむように変形するから、座屈部材１の座屈変形は、図２のように整然と行われる。このため、座屈部材１の座屈変形形状や抗力が安定し、安定したエネルギー吸収を行わせることができる。 Therefore, when a compressive load is applied to the buckling parts 5, 7, and 9 during shock absorption, it also acts as a bending load to the concave parts 10, 12, and 14 via the radius 19. Because the intermediate portions of the buckling portions 5, 7, and 9 in the cylinder axis direction are deformed so as to bulge toward the outer circumference due to these compressive loads and bending loads, the buckling deformation of the buckling member 1 occurs in an orderly manner as shown in FIG. be exposed. Therefore, the buckling deformation shape and the resistance of the buckling member 1 are stabilized, and stable energy absorption can be performed.

しかも、構造が簡単で小型軽量、且つ安価に製造することができる。 Furthermore, the structure is simple, small and lightweight, and can be manufactured at low cost.

さらに、衝突速度によって座屈部材１の抗力は変化しないので、軽量で高速な物体の衝突に対しても安定したダンパー機能を発揮することができる。 Furthermore, since the drag force of the buckling member 1 does not change depending on the collision speed, a stable damper function can be exhibited even when a lightweight, high-speed object collides.

前記座屈部５、７、９は、筒軸方向に複数段備えた。 The buckling portions 5, 7, and 9 were provided in multiple stages in the cylinder axis direction.

このため、図２のように複数段でのフランジ状等の変形ができ、段数の増加によりエネルギー吸収量を増加させることが可能となる。 For this reason, as shown in FIG. 2, deformation such as a flange shape can be performed in multiple stages, and the amount of energy absorption can be increased by increasing the number of stages.

図３は、実施例２に係る座屈部材の断面図である。 FIG. 3 is a sectional view of the buckling member according to the second embodiment.

本実施例２の座屈部材１は、前記筒部材３の筒軸方向両側の開口部の一方に衝撃を受けるためのキャップ２５を接合し他方に取付側に取り付けるためのボトムキャップ２７を接合した。 In the buckling member 1 of the second embodiment, a cap 25 for receiving impact is joined to one of the openings on both sides in the axial direction of the cylinder member 3, and a bottom cap 27 for attaching to the mounting side is joined to the other side. .

前記キャップ２５は、筒部材３の上部開口に取り付けられて、上部開口を閉止している。キャップ２５の外径は、筒部材３の一般部１１の外径とほぼ同一に形成されている。キャップ２５には雄ねじ部２９が突設されている。雄ねじ部２９の突出長さは、筒部材３の一般部１１の筒軸方向の寸法とほぼ同一又は僅かに短く設定されている。一般部１１には、雌ねじ部３１が形成されている。キャップ２５の雄ねじ部２９は、一般部１１の雌ねじ部３１に螺合結合されている。 The cap 25 is attached to the upper opening of the cylindrical member 3 to close the upper opening. The outer diameter of the cap 25 is formed to be approximately the same as the outer diameter of the general portion 11 of the cylindrical member 3. A male threaded portion 29 is provided on the cap 25 in a protruding manner. The protruding length of the male threaded portion 29 is set to be approximately the same as or slightly shorter than the dimension of the general portion 11 of the cylindrical member 3 in the cylindrical axis direction. A female threaded portion 31 is formed in the general portion 11 . The male threaded portion 29 of the cap 25 is threadedly connected to the female threaded portion 31 of the general portion 11 .

前記ボトムキャップ２７は、筒部材３の下部開口に取り付けられて、下部開口を閉止している。ボトムキャップ２７は、段付き状に形成され、キャップ部３３に対して係合操作部３５、取付用の雄ねじ部３７が一体的に形成されている。ボトムキャップ２７の軸芯部には、貫通孔３８が形成されている。 The bottom cap 27 is attached to the lower opening of the cylindrical member 3 and closes the lower opening. The bottom cap 27 is formed in a stepped shape, and an engagement operation part 35 and a male threaded part 37 for attachment are integrally formed with the cap part 33. A through hole 38 is formed in the axial center of the bottom cap 27 .

前記キャップ部３３の外径は、筒部材３の一般部１７の外径とほぼ同一に形成されている。キャップ部３３には、雄ねじ部３９が突設されている。雄ねじ部３９の突出長さは、筒部材３の一般部１７の筒軸方向の寸法とほぼ同一又は僅かに短く設定されている。一般部１７には、雌ねじ部４１が形成されている。キャップ部３３の雄ねじ部３９は、一般部１７の雌ねじ部４１に螺合結合されている。 The outer diameter of the cap portion 33 is formed to be approximately the same as the outer diameter of the general portion 17 of the cylindrical member 3. A male threaded portion 39 is provided on the cap portion 33 in a protruding manner. The protruding length of the male threaded portion 39 is set to be approximately the same as or slightly shorter than the dimension of the general portion 17 of the cylindrical member 3 in the cylindrical axis direction. A female threaded portion 41 is formed in the general portion 17 . The male threaded portion 39 of the cap portion 33 is threadedly connected to the female threaded portion 41 of the general portion 17 .

前記係合操作部３５は、キャップ部３３よりも小径に形成されている。係合操作部３５は、キャップ部３３に、テーパー部４３を介して一体に形成されている。係合操作部３５には、径方向の貫通孔４５が形成されている。 The engagement operation portion 35 is formed to have a smaller diameter than the cap portion 33. The engagement operation portion 35 is integrally formed with the cap portion 33 via a tapered portion 43. A radial through hole 45 is formed in the engagement operation portion 35 .

前記雄ねじ部３７は、取付側の雌ねじ部に螺合結合する部分である。 The male threaded portion 37 is a portion that is threadedly coupled to the female threaded portion on the mounting side.

他の構成は実施例１と同様であり、同一又は対応する構成部分に同符号を付し、重複した説明は省略する。 The other configurations are the same as those in the first embodiment, and the same or corresponding components are given the same reference numerals and redundant explanations will be omitted.

本実施例においては、取付側の雌ねじ部に雄ねじ部３７を螺合させて締結結合させる。雄ねじ部３７の螺合に際しては、係合操作部３５の貫通孔４５に螺合操作用のロッドを挿入し、このロッドにより取付側に対する座屈部材１の螺合操作を行わせることができる。 In this embodiment, the male threaded portion 37 is screwed into the female threaded portion on the mounting side for fastening and connection. When screwing the male threaded portion 37, a rod for screwing is inserted into the through hole 45 of the engagement operation portion 35, and the buckling member 1 can be screwed onto the mounting side using this rod.

衝撃吸収時にキャップ２５とボトムキャップ２７との間で座屈部５、７、９に圧縮荷重が働き、座屈部５、７、９の筒軸方向の中間部が外周方向へ変位するように変形する。 During shock absorption, a compressive load is applied to the buckled parts 5, 7, and 9 between the cap 25 and the bottom cap 27, and the intermediate parts of the buckled parts 5, 7, and 9 in the cylinder axis direction are displaced toward the outer circumference. transform.

従って、本実施例２においても実施例1と同様な作用効果を奏することができる。 Therefore, the second embodiment can also provide the same effects as the first embodiment.

また、本実施例２では、筒部材３の上部開口にキャップ２５を接合し、同下部開口にボトムキャップ２７を接合したため、キャップ２５と一般部１１とを一体的に構成し、ボトムキャップ２７と一般部１７とを一体的に構成することができる。 Further, in the second embodiment, since the cap 25 is joined to the upper opening of the cylindrical member 3 and the bottom cap 27 is joined to the lower opening, the cap 25 and the general part 11 are integrally configured, and the bottom cap 27 and The general portion 17 can be integrally configured.

前記ボトムキャップ２７は、取付用のボルト３７を備えたため、取付側に対する結合を着脱させることができ、座屈部材１の変更等を簡単に行わせることができる。 Since the bottom cap 27 is provided with the bolts 37 for attachment, it can be attached and detached from the attachment side, and the buckling member 1 can be easily changed.

そして、衝撃吸収時の圧縮荷重をキャップ２５及びボトムキャップ２７から座屈部５、９へ直接的に入力させることができる。このため、キャップ２５及びボトムキャップ２７により筒部材３の上下部開口を拘束することと相俟って座屈変形形状や抗力をより安定させることができる。 Then, the compressive load at the time of shock absorption can be directly input from the cap 25 and the bottom cap 27 to the buckling parts 5 and 9. Therefore, in combination with restraining the upper and lower openings of the cylindrical member 3 by the cap 25 and the bottom cap 27, the buckling deformation shape and the resistance can be more stabilized.

図４は、実施例３に係る座屈部材の断面図である。 FIG. 4 is a sectional view of a buckling member according to Example 3.

本実施例３の座屈部材１は、基本的構成が実施例２の座屈部材１とほぼ同一であり、キャップ２５及びボトムキャップ２７を備えている。本実施例３のキャップ２５及びボトムキャップ２７は、筒部材３に摩擦圧接により接合されている。 The buckling member 1 of the third embodiment has almost the same basic configuration as the buckling member 1 of the second embodiment, and includes a cap 25 and a bottom cap 27. The cap 25 and bottom cap 27 of the third embodiment are joined to the cylindrical member 3 by friction welding.

前記キャップ２５は、外径が一般部１１とほぼ同一であり、接合部４７を周回状に備えている。ボトムキャップ２７は、キャップ部３３の外径が一般部１７とほぼ同一であり、接合部４９を周回状に備えている。接合部４７、４９の肉厚及び外径は、一般部１１、１７とほぼ同一に設定されている。 The cap 25 has approximately the same outer diameter as the general portion 11, and includes a joint portion 47 in a circumferential manner. In the bottom cap 27, the outer diameter of the cap portion 33 is approximately the same as that of the general portion 17, and the bottom cap 27 includes a joint portion 49 in a circumferential manner. The wall thickness and outer diameter of the joint parts 47 and 49 are set to be almost the same as those of the general parts 11 and 17.

前記キャップ２５は、接合部４７の端面が一般部１１の端面に突き合わされ、摩擦圧接により接合されている。前記ボトムキャップ２７は、接合部４９の端面が一般部１７の端面に突き合わされ、摩擦圧接により接合されている。キャップ２５の接合部４７及び一般部１１間は、図示上境界線を示しているが、両者は摩擦圧接により溶融結合し、一体となっている。ボトムキャップ２７の接合部４９及び一般部１７間も同様である。 In the cap 25, the end surface of the joint portion 47 is abutted against the end surface of the general portion 11 and joined by friction welding. In the bottom cap 27, the end surface of the joint portion 49 is butted against the end surface of the general portion 17, and joined by friction welding. Although a boundary line is shown between the joint portion 47 and the general portion 11 of the cap 25 in the drawing, the two are fused and bonded by friction welding and are integrated. The same applies to the joint portion 49 of the bottom cap 27 and the general portion 17.

他の構成は実施例２と同様であり、同一又は対応する構成部分に同符号を付し、重複した説明は省略する。 The other configurations are the same as in the second embodiment, and the same or corresponding components are given the same reference numerals and redundant explanations will be omitted.

従って、本実施例３の座屈部材１は、筒部材３の上部開口にキャップ２５を端面の摩擦圧接で取り付け、同下部開口にボトムキャップ２７を端面の摩擦圧接で取り付けたため、キャップ２５と一般部１１とを一体的に構成し、ボトムキャップ２７と一般部１７とを一体的に構成することができる。 Therefore, in the buckling member 1 of the third embodiment, the cap 25 is attached to the upper opening of the cylindrical member 3 by friction welding of the end face, and the bottom cap 27 is attached to the lower opening of the same by friction welding of the end face. The bottom cap 27 and the general section 17 can be integrally constructed.

本実施例３の座屈部材１では、衝撃吸収時の圧縮荷重をキャップ２５及びボトムキャップ２７から座屈部５、９へ筒部材３の上下部開口を拘束しながら入力させることができる。このため、筒部材３の上下部開口を拘束することによって座屈変形形状や抗力をより安定させることができる。本実施例３の座屈部材１は、実施例２の座屈部材１に対して相対的に小さな衝撃吸収に適している。 In the buckling member 1 of the third embodiment, the compressive load during shock absorption can be input from the cap 25 and the bottom cap 27 to the buckling parts 5 and 9 while restraining the upper and lower openings of the cylindrical member 3. Therefore, by restraining the upper and lower openings of the cylindrical member 3, the buckling deformation shape and the resistance can be more stabilized. The buckling member 1 of the third embodiment is suitable for relatively small impact absorption compared to the buckling member 1 of the second embodiment.

その他、実施例２と同様の作用効果を奏することができる。 In addition, the same effects as in the second embodiment can be achieved.

図５は、実施例４に係る座屈部材の断面図である。 FIG. 5 is a cross-sectional view of a buckling member according to Example 4.

本実施例４の座屈部材１は、基本的構成が実施例２の座屈部材１とほぼ同一であり、キャップ２５及びボトムキャップ２７を備えている。本実施例３のキャップ２５及びボトムキャップ２７は、筒部材３に溶接により接合されている。 The buckling member 1 of the fourth embodiment has almost the same basic configuration as the buckling member 1 of the second embodiment, and includes a cap 25 and a bottom cap 27. The cap 25 and bottom cap 27 of the third embodiment are joined to the cylindrical member 3 by welding.

前記キャップ２５は、外径が一般部１１とほぼ同一であり、嵌合部５１を備えている。ボトムキャップ２７は、外径が一般部１７とほぼ同一であり、嵌合部５３を備えている。嵌合部５１の外径は、一般部１１の内径とほぼ同一であり、嵌合部５３の外径は、一般部１７の内径とほぼ同一である。嵌合部５１の筒軸方向への突出量は、一般部１１の筒軸方向の寸法より短く、嵌合部５３の筒軸方向への突出量は、一般部１７の筒軸方向の寸法より短い。嵌合部５１の筒軸方向への突出量は、一般部１１の筒軸方向の寸法と同一に設定することもでき、嵌合部５３の筒軸方向への突出量は、一般部１７の筒軸方向の寸法と同一に設定することもできる。 The cap 25 has approximately the same outer diameter as the general portion 11 and includes a fitting portion 51 . The bottom cap 27 has approximately the same outer diameter as the general portion 17 and includes a fitting portion 53. The outer diameter of the fitting portion 51 is substantially the same as the inner diameter of the general portion 11, and the outer diameter of the fitting portion 53 is substantially the same as the inner diameter of the general portion 17. The amount of protrusion of the fitting part 51 in the cylinder axis direction is shorter than the size of the general part 11 in the cylinder axis direction, and the amount of protrusion of the fitting part 53 in the cylinder axis direction is smaller than the size of the general part 17 in the cylinder axis direction. short. The amount of protrusion of the fitting part 51 in the cylinder axis direction can be set to be the same as the size of the general part 11 in the cylinder axis direction, and the amount of protrusion of the fitting part 53 in the cylinder axis direction can be set to be the same as the size of the general part 11 in the cylinder axis direction. It can also be set to be the same as the dimension in the cylinder axis direction.

前記キャップ２５は、嵌合部５１が一般部１１に嵌合され、溶接により接合されている。前記ボトムキャップ２７は、嵌合部５３が一般部１７に嵌合され、溶接により接合されている。 The cap 25 has a fitting portion 51 fitted into the general portion 11 and joined by welding. In the bottom cap 27, the fitting portion 53 is fitted into the general portion 17 and joined by welding.

他の構成は実施例２と同様であり、同一又は対応する構成部分に同符号を付し、重複した説明は省略する。 The other configurations are the same as in the second embodiment, and the same or corresponding components are given the same reference numerals and redundant explanations will be omitted.

従って、本実施例４の座屈部材１は、筒部材３の上部開口にキャップ２５を溶接で取り付けると共に嵌合部５１を一般部１１に嵌合させ、同下部開口にボトムキャップ２７を溶接で取り付けると共に嵌合部５３を一般部１７に嵌合させることができる。 Therefore, in the buckling member 1 of the fourth embodiment, the cap 25 is attached to the upper opening of the cylindrical member 3 by welding, the fitting part 51 is fitted to the general part 11, and the bottom cap 27 is welded to the lower opening. At the same time as the attachment, the fitting portion 53 can be fitted into the general portion 17.

本実施例４の座屈部材１では、衝撃吸収時の圧縮荷重をキャップ２５及びボトムキャップ２７から座屈部５、９へ筒部材３の上下部開口を拘束しながら入力させ、且つ嵌合部５１、５３によりキャップ２５及び一般部１１間の荷重伝達のガイド及びボトムキャップ２７及び一般部１７間の荷重伝達のガイドを行わせることができる。このため、筒部材３の上下部開口を拘束すること及び荷重伝達のガイドによって座屈変形形状や抗力をより安定させることができる。 In the buckling member 1 of the fourth embodiment, the compressive load at the time of shock absorption is input from the cap 25 and the bottom cap 27 to the buckling parts 5 and 9 while restraining the upper and lower openings of the cylindrical member 3, and the fitting part 51 and 53 can guide load transmission between the cap 25 and the general portion 11 and between the bottom cap 27 and the general portion 17. Therefore, by restraining the upper and lower openings of the cylindrical member 3 and guiding load transmission, the buckling deformation shape and the resistance can be more stabilized.

本実施例４の座屈部材１は、例えば実施例２、３の座屈部材１に対して相対的に中程度の大きさの衝撃吸収に適している。 The buckling member 1 of the fourth embodiment is suitable for absorbing a moderate-sized shock relative to, for example, the buckling members 1 of the second and third embodiments.

その他、実施例２と同様の作用効果を奏することができる。 In addition, the same effects as in the second embodiment can be achieved.

図６は、実施例５に係る座屈部材の断面図である。 FIG. 6 is a sectional view of a buckling member according to Example 5.

本実施例５の座屈部材１は、キャップ２５及びボトムキャップ２７を備えている。本実施例５のキャップ２５及びボトムキャップ２７は、筒部材３の上下部開口の外側に被せるように結合されている。 The buckling member 1 of the fifth embodiment includes a cap 25 and a bottom cap 27. The cap 25 and bottom cap 27 of the fifth embodiment are coupled so as to cover the outsides of the upper and lower openings of the cylindrical member 3.

前記キャップ２５は、筒部材３の上部開口に取り付けられて、上部開口を閉止している。キャップ２５の外径は、筒部材３の外径よりも大きく形成され、螺合部５５を備えている。螺合部５５の外径は、キャップ２５の外径とほぼ同一であり、螺合部５５の内径は、一般部１１の外径とほぼ同一である。螺合部５５の筒軸方向への突出量は、一般部１１の筒軸方向の寸法より短い。螺合部５５の筒軸方向への突出量は、一般部１１の筒軸方向の寸法とほぼ同一に設定することもできる。螺合部５５には雌ねじ部５７が形成され、一般部１１に雄ねじ部５９が形成されている。螺合部５５の雌ねじ部５７が一般部１１に雄ねじ部５９に螺合結合されてキャップ２５が筒部材３の上部開口外に嵌合するように結合されている。 The cap 25 is attached to the upper opening of the cylindrical member 3 to close the upper opening. The outer diameter of the cap 25 is larger than the outer diameter of the cylindrical member 3, and includes a threaded portion 55. The outer diameter of the threaded portion 55 is substantially the same as the outer diameter of the cap 25, and the inner diameter of the threaded portion 55 is substantially the same as the outer diameter of the general portion 11. The amount of protrusion of the threaded part 55 in the direction of the cylinder axis is shorter than the dimension of the general part 11 in the direction of the cylinder axis. The amount of protrusion of the threaded portion 55 in the direction of the cylinder axis can also be set to be approximately the same as the dimension of the general portion 11 in the direction of the cylinder axis. A female screw portion 57 is formed in the threaded portion 55, and a male screw portion 59 is formed in the general portion 11. The female threaded portion 57 of the threaded portion 55 is threadedly coupled to the male threaded portion 59 of the general portion 11, and the cap 25 is coupled so as to fit outside the upper opening of the cylindrical member 3.

前記ボトムキャップ２７は、筒部材３の下部開口に取り付けられて、下部開口を閉止している。ボトムキャップ２７のキャップ部３３の外径は、筒部材３の外径よりも大きく形成され、螺合部６１を備えている。螺合部６１の外径は、ボトムキャップ２７のキャップ部３３の外径とほぼ同一であり、螺合部６１の内径は、一般部１７の外径とほぼ同一である。螺合部６１の筒軸方向への突出量は、一般部１７の筒軸方向の寸法より短い。螺合部６１の筒軸方向への突出量は、一般部１７の筒軸方向の寸法とほぼ同一に設定することもできる。螺合部６１には雌ねじ部６３が形成され、一般部１７に雄ねじ部６５が形成されている。螺合部６１の雌ねじ部６３が一般部１７に雄ねじ部６５に螺合結合されてボトムキャップ２７が筒部材３の下部開口外に嵌合するように結合されている。 The bottom cap 27 is attached to the lower opening of the cylindrical member 3 and closes the lower opening. The outer diameter of the cap portion 33 of the bottom cap 27 is formed larger than the outer diameter of the cylindrical member 3, and includes a threaded portion 61. The outer diameter of the threaded portion 61 is substantially the same as the outer diameter of the cap portion 33 of the bottom cap 27, and the inner diameter of the threaded portion 61 is substantially the same as the outer diameter of the general portion 17. The amount of protrusion of the threaded part 61 in the direction of the cylinder axis is shorter than the dimension of the general part 17 in the direction of the cylinder axis. The amount of protrusion of the threaded portion 61 in the direction of the cylinder axis can also be set to be approximately the same as the dimension of the general portion 17 in the direction of the cylinder axis. A female threaded portion 63 is formed in the threaded portion 61, and a male threaded portion 65 is formed in the general portion 17. The female threaded portion 63 of the threaded portion 61 is threadedly coupled to the male threaded portion 65 of the general portion 17, and the bottom cap 27 is coupled so as to fit outside the lower opening of the cylindrical member 3.

他の構成は実施例２と同様であり、同一又は対応する構成部分に同符号を付し、重複した説明は省略する。 The other configurations are the same as in the second embodiment, and the same or corresponding components are given the same reference numerals and redundant explanations will be omitted.

従って、本実施例５の座屈部材１は、筒部材３の上部開口の外側からキャップ２５を被せるように螺合結合させ、同下部開口の外側からボトムキャップ２７を被せるように螺合結合させることができる。 Therefore, in the buckling member 1 of the fifth embodiment, the cap 25 is screwed to cover the upper opening of the cylindrical member 3 from the outside, and the bottom cap 27 is screwed to cover the lower opening of the cylindrical member 3 from the outside. be able to.

本実施例５の座屈部材１では、衝撃吸収時の圧縮荷重により座屈部５、９がフランジ状に変形するとき一般部１１、１７を外周側から螺合により拘束して一般部１１、１７の径方向への変形を規制するから座屈部５、９への荷重伝達を確実に行わせ、座屈変形形状や抗力をより安定させることができる。 In the buckling member 1 of the fifth embodiment, when the buckling parts 5 and 9 are deformed into a flange shape due to the compressive load during shock absorption, the general parts 11 and 17 are restrained by screwing from the outer peripheral side. Since the deformation of the buckling portion 17 in the radial direction is restricted, the load can be reliably transmitted to the buckling portions 5 and 9, and the buckling deformation shape and the resistance can be further stabilized.

その他、実施例２と同様の作用効果を奏することができる。 In addition, the same effects as in the second embodiment can be achieved.

図７は、実施例６に係る座屈部材の断面図である。 FIG. 7 is a sectional view of a buckling member according to Example 6.

本実施例６の座屈部材１は、基本的構成が実施例５の座屈部材１とほぼ同一であり、キャップ２５及びボトムキャップ２７を備えている。本実施例６のキャップ２５及びボトムキャップ２７は、筒部材３に圧入により接合されている。 The buckling member 1 of the sixth embodiment has almost the same basic configuration as the buckling member 1 of the fifth embodiment, and includes a cap 25 and a bottom cap 27. The cap 25 and bottom cap 27 of the sixth embodiment are joined to the cylindrical member 3 by press fitting.

前記キャップ２５は、圧入部６７を備えている。圧入部６７は、圧入溝６９を備えている。圧入溝６９は、一般部１１を圧入させる寸法に設定されている。圧入部６７の外周側部７１の外径は、キャップ２５の外径とほぼ同一である。圧入部６７の外周側部７１の筒軸方向への突出量は、一般部１１の筒軸方向の寸法より短く設定されている。外周側部７１の筒軸方向への突出量は、一般部１１の筒軸方向の寸法とほぼ同一に設定することもできる。圧入部６７の内周側部７３の筒軸方向への突出量は、一般部１１の筒軸方向の寸法及び外周側部７１よりも短い。内周側部７３の筒軸方向への突出量は、一般部１１の筒軸方向の寸法及び外周側部７１とほぼ同一に設定することもできる。キャップ２５の圧入溝６９に一般部１１が圧入されてキャップ２５が筒部材３の上部開口内外に嵌合するように結合されている。 The cap 25 includes a press-fit portion 67. The press-fitting portion 67 includes a press-fitting groove 69 . The press-fitting groove 69 is dimensioned to allow the general portion 11 to be press-fitted therein. The outer diameter of the outer peripheral side portion 71 of the press-fitting portion 67 is approximately the same as the outer diameter of the cap 25. The amount of protrusion of the outer peripheral side portion 71 of the press-fitting portion 67 in the cylinder axis direction is set to be shorter than the dimension of the general portion 11 in the cylinder axis direction. The amount of protrusion of the outer peripheral side portion 71 in the direction of the cylinder axis can also be set to be approximately the same as the dimension of the general portion 11 in the direction of the cylinder axis. The amount of protrusion of the inner peripheral side part 73 of the press-fitting part 67 in the cylinder axis direction is shorter than the dimension of the general part 11 in the cylinder axis direction and the outer peripheral side part 71 . The amount of protrusion of the inner circumferential side portion 73 in the cylinder axis direction can also be set to be substantially the same as the dimension of the general portion 11 in the cylinder axis direction and the outer circumferential side portion 71 . The general portion 11 is press-fitted into the press-fitting groove 69 of the cap 25, and the cap 25 is coupled to fit inside and outside the upper opening of the cylindrical member 3.

前記ボトムキャップ２７は、圧入部７５を備えている。圧入部７５は、圧入溝７７を備えている。圧入溝７７は、一般部１７を圧入させる寸法に設定されている。圧入部７５の外周側部７９の外径は、ボトムキャップ２７の外径とほぼ同一である。圧入部７５の外周側部７９の筒軸方向への突出量は、一般部１７の筒軸方向の寸法より短く設定されている。外周側部７９の筒軸方向への突出量は、一般部１７の筒軸方向の寸法とほぼ同一に設定することもできる。圧入部７５の内周側部８１の筒軸方向への突出量は、一般部１７の筒軸方向の寸法及び外周側部７９よりも短い。内周側部８１の筒軸方向への突出量は、一般部１７の筒軸方向の寸法及び外周側部７９とほぼ同一に設定することもできる。ボトムキャップ２７の圧入溝７７に一般部１７が圧入されてボトムキャップ２７が筒部材３の下部開口内外に嵌合するように結合されている。 The bottom cap 27 includes a press-fit portion 75. The press-fitting portion 75 includes a press-fitting groove 77 . The press-fitting groove 77 is dimensioned to allow the general portion 17 to be press-fitted therein. The outer diameter of the outer peripheral side portion 79 of the press-fitting portion 75 is approximately the same as the outer diameter of the bottom cap 27. The amount of protrusion of the outer peripheral side portion 79 of the press-fitting portion 75 in the cylinder axis direction is set to be shorter than the dimension of the general portion 17 in the cylinder axis direction. The amount of protrusion of the outer peripheral side portion 79 in the direction of the cylinder axis can also be set to be approximately the same as the dimension of the general portion 17 in the direction of the cylinder axis. The amount of protrusion of the inner peripheral side part 81 of the press-fitting part 75 in the cylinder axis direction is shorter than the dimension of the general part 17 in the cylinder axis direction and the outer peripheral side part 79. The amount of protrusion of the inner peripheral side portion 81 in the cylinder axis direction can also be set to be substantially the same as the dimension of the general portion 17 in the cylinder axis direction and the outer peripheral side portion 79. The general portion 17 is press-fitted into the press-fit groove 77 of the bottom cap 27, and the bottom cap 27 is coupled to fit inside and outside the lower opening of the cylindrical member 3.

他の構成は実施例２と同様であり、同一又は対応する構成部分に同符号を付し、重複した説明は省略する。 The other configurations are the same as those in the second embodiment, and the same or corresponding components are denoted by the same reference numerals, and redundant explanations will be omitted.

従って、本実施例６の座屈部材１は、筒部材３の上部開口に内外側からキャップ２５を被せるように圧入結合させ、同下部開口の内外側からボトムキャップ２７を被せるように圧入結合させることができる。 Therefore, in the buckling member 1 of the sixth embodiment, the cap 25 is press-fitted to cover the upper opening of the cylindrical member 3 from the inside and outside, and the bottom cap 27 is press-fitted to cover the lower opening from the inside and outside. be able to.

本実施例６の座屈部材１では、衝撃吸収時の圧縮荷重により座屈部５、９がフランジ状等に変形するとき一般部１１、１７を内外周側から拘束して内外周側への拡径縮径変形を規制するから座屈部５、９への荷重伝達を確実に行わせ、座屈変形形状や抗力をより安定させることができる。 In the buckling member 1 of Example 6, when the buckling parts 5 and 9 are deformed into a flange shape or the like due to the compressive load during shock absorption, the general parts 11 and 17 are restrained from the inner and outer circumferential sides, and the general parts 11 and 17 are restrained from the inner and outer circumference sides. Since the diameter expansion/contraction deformation is restricted, the load can be reliably transmitted to the buckling portions 5 and 9, and the buckling deformation shape and resistance can be more stabilized.

その他、実施例２と同様の作用効果を奏することができる。 In addition, the same effects as in the second embodiment can be achieved.

図８は、実施例７に係る座屈部材の断面図である。 FIG. 8 is a sectional view of a buckling member according to Example 7.

本実施例７の座屈部材１は、図４の実施例３の変形例である。なお、本実施例７の構造は、他の実施例１、２、４－６の変形例としても構成することができる。 The buckling member 1 of the seventh embodiment is a modification of the third embodiment shown in FIG. Note that the structure of the seventh embodiment can also be configured as a modification of other embodiments 1, 2, and 4-6.

本実施例７の座屈部材１は、２段の座屈部５、７を備えている。座屈部の段数は、上記実施例同様に３段、さらには４段以上にすることもできる。 The buckling member 1 of Example 7 includes two stages of buckling parts 5 and 7. The number of stages of the buckling portion can be three, or even four or more, as in the above embodiment.

前記座屈部５、７は、相互に厚みが異なり、且つ筒軸方向の幅が相互に異なるように設定したものである。座屈部５の肉厚は相対的に厚く、座屈部７の肉厚は相対的に薄く形成されている。筒軸方向の相対的な寸法は、座屈部５が大きく座屈部７は小さく設定されている。 The buckling portions 5 and 7 are set to have different thicknesses and different widths in the cylinder axis direction. The buckling portion 5 has a relatively thick wall thickness, and the buckling portion 7 has a relatively thin wall thickness. The relative dimensions in the cylinder axis direction are set such that the buckled portion 5 is large and the buckled portion 7 is small.

一般部１１、１３、１５は、筒軸方向の寸法がこの順に相対的に大きくなるように設定されている。 The general parts 11, 13, and 15 are set so that the dimensions in the cylinder axis direction become relatively large in this order.

なお、座屈部５、７の厚み、筒軸方向の寸法、一般部１１、１３、１５の厚み、軸方向の寸法は、エネルギー吸収特性に応じて種々選択することができる。 The thickness and axial dimension of the buckling parts 5 and 7 and the thickness and axial dimension of the general parts 11, 13 and 15 can be selected depending on the energy absorption characteristics.

本実施例７は、座屈部が２段であり、一般部１５にボトムキャップ２７が接合されている。 In the seventh embodiment, the buckling portion has two stages, and the bottom cap 27 is joined to the general portion 15.

他の構成は実施例２と同様であり、同一又は対応する構成部分に同符号を付し、重複した説明は省略する。 The other configurations are the same as in the second embodiment, and the same or corresponding components are given the same reference numerals and redundant explanations will be omitted.

本実施例７の座屈部材１では、座屈部５、７を段階的に座屈変形させることができる。例えば、衝撃吸収時の圧縮荷重により先ず座屈部７が座屈変形して安定し、次いで座屈部５が座屈変形して全体としてエネルギー吸収を安定して行わせることなどが可能となる。 In the buckling member 1 of the seventh embodiment, the buckling portions 5 and 7 can be buckled and deformed in stages. For example, due to the compressive load during shock absorption, the buckling portion 7 first undergoes buckling deformation and becomes stable, and then the buckling portion 5 undergoes buckling deformation, making it possible to stably absorb energy as a whole. .

その他、実施例１－６と同様の作用効果を奏することができる。 Other than that, the same effects as in Example 1-6 can be achieved.

１ 座屈部材
３ 筒部材
５、７、９ 座屈部
１０、１２、１４ 凹部
１１、１３、１５、１７ 一般部
２５ キャップ
２７ ボトムキャップ 1 Buckling member 3 Cylindrical members 5, 7, 9 Buckling parts 10, 12, 14 Recessed parts 11, 13, 15, 17 General part 25 Cap 27 Bottom cap

Claims (5)

筒部材の筒軸方向の中間部に一般部に対して相対的な薄肉の座屈部を周回状に又は周方向所定間隔で備えた座屈部材であって、
前記座屈部は、前記筒部材の内周面が径方向へ凹形状の凹部を備え、
前記内周面は、前記座屈部の前記筒軸方向の両側で前記凹部と前記一般部との間に前記座屈部に働く圧縮荷重により前記凹部に曲げ荷重を働かせて前記圧縮荷重及び前記曲げ荷重により前記座屈部の筒軸方向の中間部が外周方向へ膨らむように変形させるアールを備えた、
ことを特徴とする座屈部材。 A buckling member having a thin buckling part in a circumferential manner or at predetermined intervals in the circumferential direction relative to the general part in the middle part of the cylindrical member in the axial direction,
The buckling portion includes a concave portion in which the inner circumferential surface of the cylindrical member has a concave shape in the radial direction,
The inner circumferential surface applies a bending load to the concave portion by a compressive load acting on the buckled portion between the concave portion and the general portion on both sides of the buckled portion in the cylindrical axis direction, thereby reducing the compressive load and the general portion. comprising a radius that deforms the intermediate portion of the buckling portion in the axial direction of the cylinder so as to bulge toward the outer circumference due to a bending load ;
A buckling member characterized by: 請求項１記載の座屈部材であって、
前記座屈部は、前記筒軸方向に複数段備えた、
ことを特徴とする座屈部材。 The buckling member according to claim 1,
The buckling portion includes a plurality of stages in the direction of the cylinder axis.
A buckling member characterized by: 請求項２記載の座屈部材であって、
前記複数段の座屈部は、相互に厚みが異なる、
ことを特徴とする座屈部材。 The buckling member according to claim 2,
The plurality of stages of buckling parts have mutually different thicknesses,
A buckling member characterized by: 請求項２又は３記載の座屈部材であって、
前記複数段の座屈部は、筒軸方向の寸法が相互に異なる、
ことを特徴とする座屈部材。 The buckling member according to claim 2 or 3,
The plurality of stages of buckling portions have mutually different dimensions in the cylinder axis direction.
A buckling member characterized by: 請求項１～４の何れか１項に記載の座屈部材であって、
前記筒部材は、筒軸方向両側の開口部の一方に衝撃を受けるためのキャップを接合し他方に取付側に取り付けるためのボトムキャップを接合した、
ことを特徴とする座屈部材。 The buckling member according to any one of claims 1 to 4,
The cylindrical member has a cap for receiving an impact joined to one of the openings on both sides in the axial direction of the cylindrical member, and a bottom cap for attaching to the mounting side to the other.
A buckling member characterized by:
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Citations (6)

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Publication number Priority date Publication date Assignee Title
JP2003192250A (en) 2001-12-26 2003-07-09 Hitachi Ltd Buffer for elevator
JP2008201578A (en) 2007-02-16 2008-09-04 Adachi Kikai Seisakusho:Kk Shock absorbing mechanism using inversion by collision of cylindrical body
JP2009227153A (en) 2008-03-24 2009-10-08 Kagawa Univ Hollow structure, and method for manufacturing the same
JP2012106685A (en) 2010-11-19 2012-06-07 Kawasaki Heavy Ind Ltd Collision energy absorber of rolling stock
WO2017128496A1 (en) 2016-01-26 2017-08-03 中国科学院力学研究所 Thin-walled energy-absorbing cylinder and buckling mode control method thereof
JP2018096147A (en) 2016-12-15 2018-06-21 Ｊｆｅスチール株式会社 Damping device for flange joined tower structure and tower structure

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Publication number Priority date Publication date Assignee Title
JPS551323Y2 (en) * 1977-02-25 1980-01-16
JPS6436839A (en) * 1987-07-31 1989-02-07 Kajima Corp Elastic and plastic damper
JPH01320333A (en) * 1988-06-20 1989-12-26 Mitsubishi Heavy Ind Ltd Vibrative energy absorbing device

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Publication number Priority date Publication date Assignee Title
JP2003192250A (en) 2001-12-26 2003-07-09 Hitachi Ltd Buffer for elevator
JP2008201578A (en) 2007-02-16 2008-09-04 Adachi Kikai Seisakusho:Kk Shock absorbing mechanism using inversion by collision of cylindrical body
JP2009227153A (en) 2008-03-24 2009-10-08 Kagawa Univ Hollow structure, and method for manufacturing the same
JP2012106685A (en) 2010-11-19 2012-06-07 Kawasaki Heavy Ind Ltd Collision energy absorber of rolling stock
WO2017128496A1 (en) 2016-01-26 2017-08-03 中国科学院力学研究所 Thin-walled energy-absorbing cylinder and buckling mode control method thereof
JP2018096147A (en) 2016-12-15 2018-06-21 Ｊｆｅスチール株式会社 Damping device for flange joined tower structure and tower structure

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