WO2014126183A1 - Energy absorption member - Google Patents

Energy absorption member Download PDF

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Publication number
WO2014126183A1
WO2014126183A1 PCT/JP2014/053414 JP2014053414W WO2014126183A1 WO 2014126183 A1 WO2014126183 A1 WO 2014126183A1 JP 2014053414 W JP2014053414 W JP 2014053414W WO 2014126183 A1 WO2014126183 A1 WO 2014126183A1
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WO
WIPO (PCT)
Prior art keywords
energy absorbing
absorbing member
bulging
shape
energy
Prior art date
Application number
PCT/JP2014/053414
Other languages
French (fr)
Japanese (ja)
Inventor
友彦 安田
明成 奈良原
知士 川島
義文 小坂
茂樹 相田
真悟 矢代
道弘 川村
Original Assignee
株式会社深井製作所
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Filing date
Publication date
Application filed by 株式会社深井製作所 filed Critical 株式会社深井製作所
Publication of WO2014126183A1 publication Critical patent/WO2014126183A1/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R19/00—Wheel guards; Radiator guards, e.g. grilles; Obstruction removers; Fittings damping bouncing force in collisions
    • B60R19/02—Bumpers, i.e. impact receiving or absorbing members for protecting vehicles or fending off blows from other vehicles or objects
    • B60R19/24—Arrangements for mounting bumpers on vehicles
    • B60R19/26—Arrangements for mounting bumpers on vehicles comprising yieldable mounting means
    • B60R19/34—Arrangements for mounting bumpers on vehicles comprising yieldable mounting means destroyed upon impact, e.g. one-shot type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F7/00—Vibration-dampers; Shock-absorbers
    • F16F7/12—Vibration-dampers; Shock-absorbers using plastic deformation of members

Definitions

  • the present invention relates to an energy absorbing member such as a component part of an automobile bumper.
  • the front side member front end and bumper stay of an automobile are formed into a cylindrical shape by providing a plurality of substantially circular projections on the plate surface of a plate-like member such as aluminum or steel, and the axial direction is the front-rear direction.
  • An energy absorbing member provided along the line is known.
  • This energy absorbing member absorbs the collision energy when the automobile collides with another automobile or the like by buckling against the force applied in the cylindrical axial direction.
  • the energy absorbing member is bent with respect to the cylindrical axial direction during buckling, the energy absorption efficiency is deteriorated.
  • it is desirable that the energy absorbing member has sufficient strength.
  • various measures have been devised to improve axial resistance, such as by making it polygonal by a method such as pressing or extrusion, but the strength and behavior at which the cylindrical member buckles and deforms, Since it is determined passively depending on the length, thickness, and material of the wall, the mainstream is one that considers these optimizations.
  • a configuration in which the degree of energy absorption at the time of collision is adjusted by providing a configuration that easily breaks and deforms at an arbitrary location of a cylindrical member.
  • the cylindrical energy absorbing member is formed with a crush bead as a “fragile part” formed in a long concave groove shape along the direction orthogonal to the axial direction and having a thinner plate thickness than other parts.
  • a configuration in which a plurality of buckling beads are configured to be easily deformed by impact from the outside so that the direction and degree of buckling of the energy absorbing member are adjusted for example, Patent Document 1). reference).
  • Patent Document 1 is the same as the structure of the simple cylindrical energy absorbing member except for the place where the crash bead is provided. Therefore, it is difficult to essentially improve the energy absorption efficiency of the energy absorbing member.
  • the invention described in Patent Document 1 in order to improve the energy absorption efficiency, the size and the structure of the energy absorbing member, the specs of the automobile to which the energy absorbing member is attached, etc. It must be manufactured by individually adjusting the arrangement position. Therefore, when manufacturing as a standard product, the degree of energy absorption cannot be adjusted, and when adjusting the size and location of the crash beads individually, there is a problem that the manufacturing cost increases and the manufacturing efficiency decreases. .
  • the present invention has been made in view of the above problems, and has a high energy absorption efficiency, can freely adjust the degree of energy absorption, can suppress an increase in production cost, and can obtain a good production efficiency. It is an issue to provide.
  • the energy absorbing member of the present invention is an energy absorbing member that absorbs collision energy applied in the cylindrical axial direction by buckling, and a plurality of bulging portions are adjacent or close to each other.
  • a cylindrical plate-like member formed in a state where the bulging portion protrudes inward of the cylindrical shape and the outward of the cylindrical shape.
  • the bulging portion is formed in a mixed manner.
  • the plate-like member is formed in a rectangular tube shape including a plurality of side surface portions, and at least one of the side surface portions includes the bulging portion projecting inward of the rectangular tube shape and the It is desirable that the bulging portion protruding outward in the shape of a rectangular tube is formed in a mixed manner.
  • the side surface portion is formed with a plurality of rows in which a plurality of the bulging portions are linearly arranged, and each of the rows protrudes toward the inner side of the tubular shape. It is desirable that only the bulging portion or only the bulging portion protruding toward the outside of the cylindrical shape is formed.
  • the rows are formed along a direction substantially orthogonal to the cylindrical axial direction.
  • the plate-like member is formed with only the bulging portion protruding outward in the cylindrical shape, and the column protruding inward of the cylindrical shape. It is desirable that the rows in which only the bulging portions are formed are alternately formed.
  • a plurality of the rows are formed on each of the side surface portions, and only the bulging portions protruding outward of the cylindrical shape are formed as these rows.
  • One or a plurality of the rows, and one or a plurality of the rows in which only the bulging portions protruding toward the inner side of the cylindrical shape are formed are alternately formed. Is desirable.
  • each of the bulging portions is formed in a polygonal shape in front view having the same outer shape.
  • each of the bulging portions is formed in a regular hexagon when viewed from the front.
  • the bulging portions are formed adjacent to each other without a gap over substantially the entire surface of the plate-like member constituting the energy absorbing member.
  • the energy absorbing member receives an impact by adjusting the shape and size of the bulging portion by forming the bulging portion adjacent to or close to the plate-like member.
  • the buckling state and buckling strength can be adjusted freely so that they are in an appropriate state.
  • the bulging portions are formed adjacent to each other or close to each other, the bulging portions provide high resistance to the impact against external impacts, and can easily be buckled at the boundary between the bulging portions. Become. For this reason, a plate-shaped member can be buckled at a desired location, and an impact can be absorbed with high energy absorption efficiency.
  • the plate-like member is formed with a mixture of a bulging portion that protrudes toward the inside of the cylinder and a bulging portion that protrudes toward the outside of the tube, so that the energy absorbing member It is possible to prevent the bulging parts from interfering with each other when the buckling is buckled, and the energy absorbing member member to be bent and buckled in the axial direction. Thereby, the energy absorption efficiency is high and the energy absorption member which can adjust the degree of energy absorption freely can be provided.
  • At least one side surface portion of the plate-like member formed in a rectangular tube shape has a bulging portion that protrudes inward of the rectangular tube shape and a bulge that protrudes outward in the rectangular tube shape.
  • at least one side surface portion of the energy absorbing member exhibits high resistance against impact energy and buckles the plate-like member at a desired location, thereby absorbing high energy. Impact can be absorbed with efficiency. Further, for each side surface portion, the state of buckling of the plate-like member and the absorption amount of impact energy can be changed.
  • the energy absorbing member can be buckled more evenly along the axial direction while reflecting the location and state of the energy absorbing member and the way in which impact energy is applied. Thereby, it is possible to provide an energy absorbing member that has higher energy absorption efficiency and can freely adjust the degree of energy absorption.
  • the buckling position and the buckling direction of the energy absorbing member can be adjusted with reference to the row in which the bulging portions are arranged.
  • the buckling position and the buckling direction of the energy absorbing member can be adjusted by setting the row where the bulging portions are arranged and the position of the boundary between the rows. For this reason, design and manufacture of an energy absorption member become easy, and it becomes possible to obtain high energy absorption efficiency easily. Thereby, it is possible to provide an energy absorbing member that can be easily designed and manufactured and can absorb an impact with higher energy absorption efficiency.
  • the row in which the bulging portions are arranged is formed along a direction substantially orthogonal to the cylindrical axial direction, so that the row in which the bulging portions are arranged by the impact energy applied in the axial direction.
  • the plate-like member can be buckled without causing the bulging portions to interfere with buckling with reference to the boundary between the rows. And if it buckles on the basis of the row
  • the number of rows in which only the bulging portion protruding outward in the cylindrical shape is continuously formed, and the bulging portion protruding inward of the cylindrical shape
  • each bulging portion in a front view polygon having the same outer shape. Further, when the energy absorbing member is buckled, bending with respect to the cylindrical axial direction is less likely to occur. Furthermore, since each bulge part is the same shape, manufacture is easy. Thereby, an energy absorption member with high energy absorption efficiency can be formed easily.
  • the bulging portion in a substantially hexagonal shape when viewed from the front, the bulging portion is densely packed in the plate-like member, and the honeycomb structure can be easily formed. Therefore, it becomes easy to give a very high resistance to the impact applied in the plate surface direction of the energy absorbing member. Thereby, an energy absorption member with high energy absorption efficiency can be provided more easily.
  • the energy absorbing member is formed over substantially the entire surface so that the bulging portions are adjacent to each other with no gap, so that the energy absorbing member has a high resistance to impact over the entire surface of the energy absorbing member, and the energy absorption efficiency can be easily adjusted. Can be formed. As a result, an energy absorbing member that has high energy absorption efficiency and can freely adjust the degree of energy absorption can be provided more easily.
  • the impact force acting on the bumper at the time of a vehicle collision can be effectively absorbed by the energy absorbing member, and the impact force transmitted to the vehicle body strength member can be reduced as much as possible.
  • FIG. 2 is a partial sectional view taken along line AA in FIG.
  • FIG. 3 is a cross-sectional view taken along the line BB in FIG. It is the elements on larger scale of the motor vehicle to which the energy absorption member of Embodiment 1 of this invention is applied.
  • FIG. 7 is a partial cross-sectional view taken along the line CC of FIG. 6.
  • FIG. 7 is a DD cross-sectional view of FIG. 6.
  • FIG. 10 is a partial cross-sectional view taken along line EE in FIG. 9.
  • FIG. 10 is a sectional view taken along line FF in FIG. 9. It is a graph which shows the experimental result of the energy absorption state of the energy absorption member which concerns on this invention, and the conventional energy absorption member. It is a graph which shows the experimental result of the energy absorption state of the energy absorption member which concerns on this invention, and the conventional energy absorption member.
  • Embodiment 1 of the Invention 1 to 5 show a first embodiment of the present invention.
  • the energy absorbing member 11A according to the first embodiment shown in FIG. 1 is used for shock absorption of a bumper of the automobile 100 shown in FIG.
  • the energy absorbing member 11 ⁇ / b> A includes a side member 102 as a “body strength member” that extends in the vehicle front-rear direction below the side of the engine room 101 of the automobile 100 and a bumper skin 103.
  • a bumper reinforcing member 104 extending along the vehicle width direction is disposed along the vehicle longitudinal direction.
  • the energy absorbing member 11A is provided between the front side member 102 and the bumper reinforcing member 104 of the automobile 100, the energy absorbing member 11A is a rear side member (see FIG. 5). (Not shown) and a bumper reinforcing member (not shown) may be provided.
  • the energy absorbing member 11A is formed of a metal plate material as a “plate member” that has high rigidity and can absorb kinetic energy applied from the outside by plastic deformation.
  • the energy absorbing member 11A is formed of a steel plate having a thickness of about 1.2 to 2.0 millimeters.
  • the “plate member” constituting the energy absorbing member 11A can be formed of any material as long as it is a plastic material having good rigidity and kinetic energy absorption characteristics.
  • it can also be formed of a metal other than aluminum, such as a steel plate, an aluminized steel plate, a laminate of an aluminum plate and a resin film material, a resin, and a plywood thereof.
  • the energy absorbing member 11A is formed in a rectangular tube shape as shown in FIG. Specifically, in the energy absorbing member 11A, the plate-shaped plate material is substantially perpendicular to three parallel fold lines, that is, fold lines 20 (1), 20 (2), and 20 (3) shown in FIGS. Are bent into a square cylinder, and both sides are joined by spot welding or the like to form a fold line 20 (4).
  • the energy absorbing member 11A may be manufactured by any manufacturing method other than this. Accordingly, the energy absorbing member 11A includes a plate material as a “plate-shaped member” having a rectangular tube shape having four side surface portions 12 (1), 12 (2), 12 (3), and 12 (4). The inside surrounded by the side surface portions 12 (1), 12 (2), 12 (3), and 12 (4) is hollow, and the openings 13 and 13 are formed at both ends.
  • the energy absorbing member 11A is fixed to the side member 102 and the bumper reinforcing member 104 shown in FIG.
  • the central shaft 14 is disposed so as to face the front-rear direction of the automobile 100.
  • the energy absorbing member 11A is not limited to a rectangular cylinder, but may be a polygonal cylinder such as a circular cylinder, a pentagonal cylinder, or a hexagonal cylinder in plan view (that is, viewed from the opening 13 side). It may be a shape. Further, the inside of the energy absorbing member 11A may be partitioned by a partition member extending in the axial direction. Further, the energy absorbing member 11A may be fixed to the side member 102 and the bumper reinforcing member 104 in any configuration.
  • the energy absorbing member 11A is not limited to a cylindrical shape such as a square cylindrical shape, and may have any shape and structure as long as it has good rigidity and kinetic energy absorption characteristics.
  • it may have a shape in which plate materials are provided at both ends and the internal space is sealed, or a structure such as a rectangular cylinder or a cylinder formed by filling a material such as urethane inside. .
  • the bulging portion 15 of the energy absorbing member 11A has a polygonal shape when viewed from the front.
  • all the bulging portions 15 are formed in the same shape. That is, each bulging portion 15 has the same external hexagonal shape when viewed from the front, and has the same bulging size.
  • a ridge line 16 that is inclined toward the protruding direction of the bulging portion 15 is formed on the line connecting the three opposing corners of the bulging portion 15, as shown in FIGS. 3 and 4, a ridge line 16 that is inclined toward the protruding direction of the bulging portion 15 is formed. Yes. As shown in FIGS. 3 and 4, these ridge lines 16 form a curve that curves in the protruding direction of the bulging portion 15, and the intersection 17 of the ridge lines 16 is the highest point in the bulging direction.
  • the surface surrounded by the two ridgelines 16 and 16 of the bulging portion 15 and one side 18 of the outer shape forms a plane.
  • the bulging portion 15 is formed in a shape and size that favorably absorb the collision energy received when the automobile 100 collides.
  • one side of the outer shape of the bulging portion 15 is 12 millimeters and the height is 3 millimeters.
  • the bulging portion 15 may be formed in any outer shape or height as long as the collision energy absorption state is good.
  • the bulging portion 15 is arranged in a manner in which it does not easily bend in the cylindrical axial direction, that is, the direction along the central axis 14 shown in FIG. Specifically, as shown in FIG. 1, the energy absorbing member 11A is disposed over the entire area.
  • All the adjacent bulging portions 15 are adjacent to each other without a gap, and form a so-called honeycomb structure.
  • a configuration in which all the adjacent bulging portions 15 are close to each other with a certain gap that is, the original flat portion of the plate material between the sides 18 of the outer shape of the adjacent bulging portions 15 is arbitrary. It may be a configuration in which only the width remains.
  • the bulging part 15 is substantially the center axis
  • a plurality of rows are arranged with the orthogonal direction as one row. Specifically, as shown in FIG. 1, a first row 19 (1) in which bulging portions 15 (1), 15 (2), 15 (3) are arranged in a direction substantially orthogonal to the central axis 14 is provided. The second row 19 (2) in which the bulging portions 15 (4), 15 (5), 15 (6), 15 (7) are arranged immediately below the first row 19 (1) is formed. In the same manner, the third column 19 (3), the fourth column 19 (4),... Are formed in n columns (n is a natural number).
  • each row for example, the first row 19 (1), the second row 19 ( 2)...
  • the nth row 19 (n) has a row in which only the bulging portion 15 projecting outward from the square tubular shape of the energy absorbing member 11A is formed, and a square tubular shape.
  • the rows in which only the bulging portions 15 projecting inward are formed are alternately formed.
  • the bulging portions 15 (1), 15 (2), and 15 (3) forming the first row 19 (1) are all located inside the rectangular tube shape of the energy absorbing member 11 A.
  • the bulging portions 15 (4), 15 (5), 15 (6), and 15 (7) that protrude toward the second row 19 (2) are all squares of the energy absorbing member 11A. It protrudes toward the outside of the tube. Similarly, all the bulging portions 15 forming the third row 19 (3) protrude toward the inner side of the rectangular tube shape of the energy absorbing member 11A, and the bulging portions 15 forming the fourth row 19 (4). Are protruded outward in the rectangular tube shape of the energy absorbing member 11A, and these configurations are repeated up to the nth row 19 (n).
  • the columns formed on the side surface portions 12 (1), 12 (2), 12 (3), and 12 (4) are formed so as to be continuous with each other. . And as these rows, the bulging portion 15 protrudes toward the outside of the rectangular tube shape of the energy absorbing member 11A, and the bulging portion 15 protrudes toward the inside of the rectangular tube shape of the energy absorbing member 11A.
  • the rows are alternately formed.
  • the same row of the bulging portions 15 of the opposing surfaces has the same protruding direction, and the same row of the bulging portions 15 of the adjacent surfaces has the protruding direction opposite.
  • line 19 (21) of the side part 12 (3) is 11A of energy absorption members. Projecting toward the inside of the rectangular tube, and forming the first row 19 (11) of the side surface portion 12 (2) and the bulging portion 15 forming the first row 19 (31) of the side surface portion 12 (4),
  • the energy absorbing member 11 ⁇ / b> A is configured to protrude toward the outside of the rectangular tube shape.
  • the bulging portions 15 arranged in the same row on all surfaces may be configured so that the protruding directions are all the same.
  • the impact load When an impact load is applied to the bumper skin 103 from the front of the automobile 100, the impact load is transmitted to the energy absorbing member 11A via the bumper reinforcing member 104. Then, since the energy absorbing member 11 ⁇ / b> A is set to have a buckling load smaller than that of the side member 102, the energy absorbing member 11 ⁇ / b> A can buckle in the direction of the central axis 14 and suppress transmission of the load to the side member 102.
  • each bulging portion 15 is substantially hexagonal when viewed from the front, each vertex portion and the intersection 17 of the ridge line 16 form a substantially triangular shape, and the plurality of bulging portions 15 form a honeycomb structure. Therefore, there is a high resistance against the force applied along the surface direction of the side surfaces 12 (1), 12 (2), 12 (3), 12 (4).
  • the outer peripheral part of the bulging part 15 becomes a reference position at the time of buckling (that is, the energy absorbing member 11A is a surface of the side parts 12 (1), 12 (2), 12 (3), 12 (4).
  • the buckling portion 15 of the bulging portion 15 is different. By adjusting the size, the arrangement position, and the like, the degree of energy absorption can be adjusted without depending only on the wall length, plate thickness, and material of the energy absorbing member 11A.
  • the bulging portion 15 is provided on substantially the entire surface of the energy absorbing member 11A, high energy absorption efficiency can be obtained on the entire surface of the energy absorbing member 11A, and the side surface portions 12 (1), 12 ( 2), 12 (3), and 12 (4) have almost equal strength.
  • the energy absorbing member 11 ⁇ / b> A is more likely to buckle at the boundary portion between the plurality of adjacent bulging portions 15 than the central portion of the bulging portion 15, the portion corresponding to one side 18 of the bulging portion 15 is bent. Bending will progress. As the number of buckling points (that is, the number of bucklings of the energy absorbing member 11A) increases, the amount of shock energy absorbed increases. Therefore, 11 A of energy absorption members of this Embodiment 1 absorb collision energy with high energy absorption efficiency compared with the energy absorption member (refer patent document 1) provided with the conventional crash bead.
  • the energy absorbing member 11A has a bulging portion 15 in a direction substantially orthogonal to the central axis 14, the first row 19 (1), the second row 19 (2),... The n th row 19. Since (n) is formed, the energy absorbing member 11A has the first row 19 (1), the second row 19 (2)... Nth by the impact energy applied along the central axis 14. Buckle with reference to column 19 (n). At this time, the first row 19 (1), the second row 19 (2),..., The nth row 19 (n) are often bent in a bellows shape.
  • Projection direction of the protruding portion 15 (for example, the protruding direction of the bulging portions 15 (1) to 15 (3) of the first row 19 (1) and the protruding portion 15 (4) to 15 (7) of the second row Since the directions are alternately formed on the outer side and the inner side, when the energy absorbing member 11A is buckled, the bulging portions 15 of adjacent rows do not interfere with each other to prevent buckling. . Therefore, the energy absorbing member 11A buckles in a bellows shape with reference to the second row 19 (2)... Nth row 19 (n).
  • the energy absorbing member 11A buckles evenly in the axial direction of the central axis 14 before buckling while the energy absorbing member 11A is prevented from being bent with respect to the central axis 14 when an impact is applied.
  • high energy absorption efficiency can be obtained.
  • size of the bulging part 15 are adjusted by the several bulging part 15 being formed in the state which adjoined or adjoined to the board
  • the energy absorbing member 11A is formed with a mixture of a bulging portion 15 projecting inward of the rectangular tube shape and a bulging portion 15 projecting outward of the square tube shape.
  • the bulging portions 15 interfere with each other, and the energy absorbing member 11A can be prevented from being bent and buckled with respect to the axial direction of the central axis 14.
  • energy absorption member 11A which has high energy absorption efficiency and can freely adjust the degree of energy absorption can be provided.
  • At least one side surface portion of the energy absorbing member 11A formed in a square tube shape has a bulge portion 15 (for example, a bulge portion 15 ( 1)) and the bulging portion 15 (for example, the bulging portion 15 (4)) that protrudes outward in the shape of a rectangular tube are formed in a mixed manner, so that at least one side surface of the energy absorbing member 11A is formed.
  • the portion for example, the side surface portion 12 (1), it is possible to exert a high resistance against the impact energy and to buckle the energy absorbing member 11A at a desired location to absorb the impact with high energy absorption efficiency.
  • the energy absorbing member 11A can be buckled more evenly along the axial direction of the central axis 14 while reflecting the arrangement location and arrangement state of the energy absorbing member 11A, how to apply impact energy, and the like. .
  • the energy absorbing member 11A having higher energy absorption efficiency and capable of freely adjusting the degree of energy absorption can be provided.
  • Each of the nth rows 19 (n) has only a bulging portion 15 projecting inwardly in the shape of a square tube or only a bulging portion 15 projecting outward in the shape of a square tube.
  • the buckling position and the buckling direction of the energy absorbing member 11A can be adjusted with reference to the row in which the bulging portions 15 are arranged. That is, the position of buckling and the direction of buckling in the energy absorbing member 11A are shown in the first row 19 (1), the second row 19 (2),.
  • the member 11A can be easily designed and manufactured, and high energy absorption efficiency can be easily obtained. Thereby, 11 A of energy absorption members which can perform design and manufacture easily and can absorb an impact with higher energy absorption efficiency can be provided.
  • a row in which only the bulging portion 15 protruding outward in the shape of a square tube is formed for example, the second row 19 (2), the fourth row 19 (4).
  • rows in which only the bulging portions 15 projecting inwardly in the shape of a square cylinder are formed for example, the first row 19 (1) and the third row 19 (3) are alternately formed.
  • the first row 19 (1), the second row 19 (2),..., The nth row 19 (n) in which the bulging portions 15 are arranged have a square cylindrical center.
  • the plate-like member can be buckled without the bulging portions 15 becoming a hindrance to buckling, with reference to the boundary of.
  • the energy absorbing member 11A naturally impacts while buckling evenly along the axial direction of the central axis 14. Absorb energy. As a result, the energy absorbing member 11A having higher energy absorption efficiency and capable of freely adjusting the degree of energy absorption can be provided.
  • each of the side surface portions 12 (1) to 12 (4) is formed with a row in which the bulging portions 15 are arranged in a direction substantially perpendicular to the axial direction of the central axis 14. For each row, only the bulging portions 15 projecting inward in the rectangular tube shape and only the bulging portions 15 projecting outward in the square tube shape are alternately arranged.
  • the configuration may be such that the structure is formed only on a part of the side surfaces 12 (1) to 12 (4).
  • the energy absorbing member 11B according to the second embodiment, the entire view of which is shown in FIG. 6, is a bulge that forms the first row 19 (1) and the second row 19 (2). All the portions 15 protrude toward the inside of the rectangular tube shape of the energy absorbing member 11, and all the bulging portions 15 forming the third row 19 (3) and the fourth row 19 (4) are all in the energy absorbing member 11.
  • the bulging portion 15 has a configuration in which the bulging portion 15 alternately protrudes outward and inward every two rows.
  • the strength and energy absorption amount can be adjusted according to the location, shape, and size of the automobile 100 in which the energy absorbing member 11B is disposed.
  • the bulging portion 15 is not provided in every three rows or every four or more rows instead of the energy absorbing member 11B. It can also be set as the structure which protrudes inward and inward alternately.
  • Embodiment 3 of the Invention 9 to 11 show a third embodiment of the present invention.
  • the protruding direction is different from the first and second embodiments.
  • the energy absorbing member 11C of the third embodiment which is shown in FIG. 9 as an overall view, has a first row 19 (31) to a third row 19 (in the side surface portion 12 (3) as shown in FIG. 33), the bulging portion 15 forming the sixth row 19 (36) and the seventh row 19 (37), and the bulging portion 15 forming the ninth row 19 (39). All protrude outwardly of the rectangular tube shape of the energy absorbing member 11, and the fourth and fifth rows 19 (34), 19 (35), and the eighth row 19 (38) are all in the energy absorbing member 11.
  • the structure which protrudes toward the inside of a rectangular tube shape is provided. That is, the rows of the energy absorbing member 11 in which the bulging portions 15 projecting outward in the rectangular tube shape are arranged to change every three rows, every two rows, and every row.
  • the energy absorption member 11C can be adjusted in strength and energy absorption amount according to the location, shape, and size of the automobile 100 to be disposed.
  • the arrangement of the energy absorbing members 11C may be further changed to have different rules or irregular arrangements.
  • the energy absorbing members 11A, 11B, and 11C are provided between the side member 102 and the bumper reinforcing member 104 of the automobile 100.
  • the energy absorbing members 11A, 11B, and 11C are mounted on the vehicle body. It can also be provided in other parts.
  • energy absorption member 11A, 11B, 11C can also be applied to things other than a motor vehicle.
  • FIG.12 and FIG.13 shows the experimental result of the energy absorption state of the energy absorption member which concerns on this invention.
  • the vertical axis is the reaction force (unit kN)
  • the horizontal axis is the stroke (unit mm)
  • the vertical axis in FIG. 13 is the absorbed EA amount (unit J)
  • the horizontal axis is the stroke (unit mm).
  • FIG. 12 shows the relationship between the reduction in length due to buckling of the energy absorbing member and the reaction force
  • FIG. 13 shows the relationship between the reduction in length accompanying buckling of the energy absorbing member and the absorption. It shows the relationship with the amount of energy.
  • reference numeral 110 denotes an energy absorbing member 11A of the present invention, with one end attached to a fixed member, a 700 kg rigid body freely dropped from a height of 1.3 m from the other end side, and an initial speed of 18.2 km / h. A change in reaction force and a change in absorbed energy when the shaft is crushed are shown.
  • the energy absorbing member 11A of the first embodiment used in the experiment is formed of steel materials of SPC440W / 1.8t and 1.6t (YP: 355 MPa, TS: 483 MPa, El: 33%).
  • the length of one side of the energy absorbing member 11A is 80 mm.
  • Numeral 120 is an experimental result of an energy absorbing member (not shown) as a first comparative example.
  • the material, shape, and diameter of the energy absorbing member are the same as those of the energy absorbing member 11A of the first embodiment, except that the energy absorbing member is formed of a flat plate without the bulging portion 15.
  • Numeral 130 is an experimental result of an energy absorbing member (not shown) as a second comparative example.
  • the material, shape, and diameter of the energy absorbing member are the same as those of the energy absorbing member 11A of the first embodiment, a crush bead is provided in the same manner as the energy absorbing member described in Patent Document 1 instead of the bulging portion 15. The difference is that
  • the experiment contents for the first and second comparative examples are the same as the experiment contents for the energy absorbing member 11A of the first embodiment.
  • the energy absorbing member 11 of the present invention can increase the total amount of absorbed energy while keeping the initial drag small.
  • the energy absorbing member of the first comparative example has a very large initial drag and a small amount of absorbed energy.
  • the energy absorption amount of the second comparative example is as small as that of the first comparative example.
  • the energy absorbing member of the second comparative example has a small amount of absorbed energy although the initial drag is relatively small.
  • the energy absorbing member 11 of the present invention has a low initial drag, a large amount of absorbed energy, and a high performance as an energy absorbing member.
  • 11A, 11B, 11C ... energy absorbing member 12 (1), 12 (2), 12 (3), 12 (4) ... side face 14 ... central axis (axis) 15, 15 (1), 15 (2), 15 (3), 15 (4), 15 (5), 15 (6), 15 (7), 15 (8), 15 (9) ... swelling Output part 19, 19 (1), 19 (2), 19 (3), 19 (4), 19 (n) ... row 100 ... automobile 102 ... side member (body strength member) 104 ... Bumper reinforcement member

Abstract

[Problem] To provide an energy absorption member that has a high energy absorption efficiency and can adjust the degree of energy absorption. [Solution] The energy absorption member has a plate-shaped member that has been formed into a tubular shape. Also, impact energy is absorbed by buckling the plate-shaped member. To said end, in the plate-shaped member, a plurality of expansion sections are formed in an adjacent or proximal state. Also, expansion sections protruding towards the inside of the tubular shape and expansion sections protruding towards the outside of the tubular shape are formed in co-existence as the expansion sections.

Description

エネルギー吸収部材Energy absorbing member
　本発明は、自動車のバンパの構成部品等のエネルギー吸収部材に関する。 The present invention relates to an energy absorbing member such as a component part of an automobile bumper.
　従来から、自動車には、衝突時に外部から加わる衝撃がボディに伝わるのを防ぐ機構が設けられる。このため、従来、自動車のフロントサイドメンバ前端やバンパステーに、アルミニウム、スチール等の板状部材の板面に複数の正面視略円形の凸部を設けて筒状に形成し、軸方向を前後方向に沿って設けたエネルギー吸収部材が知られている。 Conventionally, automobiles are provided with a mechanism that prevents external shocks from being transmitted to the body in the event of a collision. For this reason, conventionally, the front side member front end and bumper stay of an automobile are formed into a cylindrical shape by providing a plurality of substantially circular projections on the plate surface of a plate-like member such as aluminum or steel, and the axial direction is the front-rear direction. An energy absorbing member provided along the line is known.
　このエネルギー吸収部材は、筒状の軸方向に加わった力に対して座屈することで自動車が他の自動車等に衝突した際の衝突エネルギーを吸収する。ここで、座屈時にエネルギー吸収部材が筒状の軸方向に対して折れ曲がってしまうとエネルギー吸収効率が悪くなる。更に、エネルギー吸収部材は強度が確保されていることが望ましい。一般的なものは、プレスや、押出し等の工法で多角形化するなどして、軸抗力の向上に様々な工夫をしているが、筒状の部材が座屈変形する強度及び挙動は、壁の長さ、板厚、材質によって受動的に決まってしまうため、これらの最適化に配慮されたものが主流である。 This energy absorbing member absorbs the collision energy when the automobile collides with another automobile or the like by buckling against the force applied in the cylindrical axial direction. Here, if the energy absorbing member is bent with respect to the cylindrical axial direction during buckling, the energy absorption efficiency is deteriorated. Furthermore, it is desirable that the energy absorbing member has sufficient strength. In general, various measures have been devised to improve axial resistance, such as by making it polygonal by a method such as pressing or extrusion, but the strength and behavior at which the cylindrical member buckles and deforms, Since it is determined passively depending on the length, thickness, and material of the wall, the mainstream is one that considers these optimizations.
　また、エネルギー吸収総量を上げようとすると、衝突初期の軸抗力が上がってしまう傾向にあり、これが乗員への障害値を低減する上での足枷となってしまっていた。また、軽衝突においてメインフレームを損壊させ、補修費用増加を招いていた。従って、こうしたエネルギー吸収部材には、衝突初期は低く且つ、ストロークの全長に渡って十分な抗力を発揮し続けるような特性が求められる。 Also, when trying to increase the total amount of energy absorption, the axial drag tends to increase at the beginning of the collision, which has become a foothold in reducing the obstacle value to the occupant. In addition, the mainframe was damaged in a light collision, leading to an increase in repair costs. Therefore, such an energy absorbing member is required to have characteristics that are low in the initial stage of the collision and that continue to exhibit sufficient drag over the entire length of the stroke.
　そこで、従来、筒状の部材の任意の場所に、破壊変形されやすい構成を設けることで、衝突時のエネルギー吸収の度合いを調節する構成が知られている。具体的には、筒状のエネルギー吸収部材に、軸方向に対して直交方向に沿って長い凹溝状に形成された、他の箇所よりも板厚の薄い「脆弱部」としてのクラッシュビードを複数設け、外部からの衝撃に対しクラッシュビードの破壊変形が起こり易くなるように構成することで、エネルギー吸収部材の座屈の方向や度合いを調節する構成が知られている（例えば、特許文献１参照）。 Therefore, conventionally, a configuration is known in which the degree of energy absorption at the time of collision is adjusted by providing a configuration that easily breaks and deforms at an arbitrary location of a cylindrical member. Specifically, the cylindrical energy absorbing member is formed with a crush bead as a “fragile part” formed in a long concave groove shape along the direction orthogonal to the axial direction and having a thinner plate thickness than other parts. There is known a configuration in which a plurality of buckling beads are configured to be easily deformed by impact from the outside so that the direction and degree of buckling of the energy absorbing member are adjusted (for example, Patent Document 1). reference).
特開２００５－１４６２号公報Japanese Patent Laid-Open No. 2005-1462
　しかし、特許文献１に記載の発明は、クラッシュビードが設けられた箇所以外の箇所は、単なる筒状のエネルギー吸収部材の構成と変わりはない。そのため、エネルギー吸収部材のエネルギー吸収効率を本質的に向上させることは難しい。そして、特許文献１に記載の発明においては、エネルギー吸収効率を向上させるためには、エネルギー吸収部材の形状や構造、エネルギー吸収部材が取り付けられる自動車のスペック等を考慮して、クラッシュビードの大きさや配設位置等を個別に調節して製造しなければならない。そのため、規格品として製造する場合にはエネルギー吸収の度合いを調節できず、クラッシュビードの大きさや配設位置を個別に調節する場合には製造コストの高騰や製造効率の低下を招くという問題がある。 However, the invention described in Patent Document 1 is the same as the structure of the simple cylindrical energy absorbing member except for the place where the crash bead is provided. Therefore, it is difficult to essentially improve the energy absorption efficiency of the energy absorbing member. In the invention described in Patent Document 1, in order to improve the energy absorption efficiency, the size and the structure of the energy absorbing member, the specs of the automobile to which the energy absorbing member is attached, etc. It must be manufactured by individually adjusting the arrangement position. Therefore, when manufacturing as a standard product, the degree of energy absorption cannot be adjusted, and when adjusting the size and location of the crash beads individually, there is a problem that the manufacturing cost increases and the manufacturing efficiency decreases. .
　本発明は上記の問題に鑑みてなされたものであり、エネルギー吸収効率が高く、エネルギー吸収の度合いを自在に調節でき、製造コスト高騰を抑止でき、良好な製造効率を得ることができるエネルギー吸収部材を提供することを課題としている。 The present invention has been made in view of the above problems, and has a high energy absorption efficiency, can freely adjust the degree of energy absorption, can suppress an increase in production cost, and can obtain a good production efficiency. It is an issue to provide.
　かかる課題を達成するために、本発明のエネルギー吸収部材は、座屈することによって前記筒状の軸方向に加わった衝突エネルギーを吸収するエネルギー吸収部材であって、複数の膨出部が隣接又は近接した状態で形成された、筒状の板状部材を有し、前記板状部材には、前記筒状の内方に向かって突出する前記膨出部と前記筒状の外方に向かって突出する前記膨出部とが混在して形成されていることを特徴とする。 In order to achieve such an object, the energy absorbing member of the present invention is an energy absorbing member that absorbs collision energy applied in the cylindrical axial direction by buckling, and a plurality of bulging portions are adjacent or close to each other. A cylindrical plate-like member formed in a state where the bulging portion protrudes inward of the cylindrical shape and the outward of the cylindrical shape. The bulging portion is formed in a mixed manner.
　本発明においては、前記板状部材は複数の側面部からなる角筒状に形成され、少なくとも一つの前記側面部には、前記角筒状の内方に向かって突出する前記膨出部と前記角筒状の外方に向かって突出する前記膨出部とが混在して形成されていることが望ましい。 In the present invention, the plate-like member is formed in a rectangular tube shape including a plurality of side surface portions, and at least one of the side surface portions includes the bulging portion projecting inward of the rectangular tube shape and the It is desirable that the bulging portion protruding outward in the shape of a rectangular tube is formed in a mixed manner.
　本発明において、前記側面部には、複数の前記膨出部が直線状に配列されてなる列が複数形成され、それぞれの前記列には、前記筒状の内方に向かって突出された前記膨出部のみ、又は、前記筒状の外方に向かって突出された前記膨出部のみが形成されていることが望ましい。 In the present invention, the side surface portion is formed with a plurality of rows in which a plurality of the bulging portions are linearly arranged, and each of the rows protrudes toward the inner side of the tubular shape. It is desirable that only the bulging portion or only the bulging portion protruding toward the outside of the cylindrical shape is formed.
　本発明において、前記列は、前記筒状の前記軸方向に対して略直交する方向に沿って形成されることが望ましい。 In the present invention, it is preferable that the rows are formed along a direction substantially orthogonal to the cylindrical axial direction.
　本発明において、前記板状部材には、前記筒状の外方に向かって突出された前記膨出部のみが形成されている前記列と、前記筒状の内方に向かって突出された前記膨出部のみが形成されている前記列とが交互に形成されることが望ましい。 In the present invention, the plate-like member is formed with only the bulging portion protruding outward in the cylindrical shape, and the column protruding inward of the cylindrical shape. It is desirable that the rows in which only the bulging portions are formed are alternately formed.
　本発明においては、それぞれの前記側面部に、前記列が、複数本ずつ形成され、且つ、これらの列として、前記筒状の外方に向かって突出された前記膨出部のみが形成されている１本又は複数本の前記列と、前記筒状の内方に向かって突出された前記膨出部のみが形成されている１本又は複数本の前記列とが、交互に形成されることが望ましい。 In the present invention, a plurality of the rows are formed on each of the side surface portions, and only the bulging portions protruding outward of the cylindrical shape are formed as these rows. One or a plurality of the rows, and one or a plurality of the rows in which only the bulging portions protruding toward the inner side of the cylindrical shape are formed are alternately formed. Is desirable.
　本発明において、それぞれの前記膨出部は、外形が同一形状の正面視多角形に形成されることが望ましい。 In the present invention, it is preferable that each of the bulging portions is formed in a polygonal shape in front view having the same outer shape.
　本発明において、それぞれの前記膨出部の前記外形は、正面視正六角形に形成されることが望ましい。 In the present invention, it is desirable that the outer shape of each of the bulging portions is formed in a regular hexagon when viewed from the front.
　本発明において、前記エネルギー吸収部材を構成する前記板状部材の略全面にわたって、前記膨出部が隙間なく隣接して形成されることが望ましい。 In the present invention, it is desirable that the bulging portions are formed adjacent to each other without a gap over substantially the entire surface of the plate-like member constituting the energy absorbing member.
　本発明において、自動車の車体強度部材と車幅方向に沿うバンパ補強部材との間に配設されることが望ましい。 In the present invention, it is desirable to be disposed between the vehicle body strength member of the automobile and the bumper reinforcement member along the vehicle width direction.
　本発明によれば、板状部材に複数の膨出部が隣接又は近接した状態で形成されていることにより、膨出部の形状や大きさを調節することで、エネルギー吸収部材が衝撃を受けた際の座屈状態や座屈強度が適切な状態になるように自在に調節できる。また、膨出部が隣接又は近接した状態で形成されていることにより、外部からの衝撃に対し、膨出部によって衝撃に対する高い抗力を奏すると共に、膨出部同士の境界において座屈が容易になる。このため、板状部材を所望の箇所で座屈させ、かつ、高いエネルギー吸収効率で衝撃を吸収させることができる。更に、板状部材には、筒状の内方に向かって突出する膨出部と筒状の外方に向かって突出する膨出部とが混在して形成されていることにより、エネルギー吸収部材が座屈した際に膨出部同士が干渉し合ってしまい、エネルギー吸収部材部材が軸方向に対して折れ曲がって座屈することを抑止できる。これにより、エネルギー吸収効率が高く、エネルギー吸収の度合いを自在に調節できるエネルギー吸収部材を提供できる。 According to the present invention, the energy absorbing member receives an impact by adjusting the shape and size of the bulging portion by forming the bulging portion adjacent to or close to the plate-like member. The buckling state and buckling strength can be adjusted freely so that they are in an appropriate state. In addition, since the bulging portions are formed adjacent to each other or close to each other, the bulging portions provide high resistance to the impact against external impacts, and can easily be buckled at the boundary between the bulging portions. Become. For this reason, a plate-shaped member can be buckled at a desired location, and an impact can be absorbed with high energy absorption efficiency. Furthermore, the plate-like member is formed with a mixture of a bulging portion that protrudes toward the inside of the cylinder and a bulging portion that protrudes toward the outside of the tube, so that the energy absorbing member It is possible to prevent the bulging parts from interfering with each other when the buckling is buckled, and the energy absorbing member member to be bent and buckled in the axial direction. Thereby, the energy absorption efficiency is high and the energy absorption member which can adjust the degree of energy absorption freely can be provided.
　本発明において、角筒状に形成された板状部材の少なくとも一つの側面部には、角筒状の内方に向かって突出する膨出部と角筒状の外方に向かって突出する膨出部とが混在して形成されることにより、エネルギー吸収部材の少なくとも一つの側面部において、衝撃エネルギーに対して高い抗力を奏させると共に板状部材を所望の箇所で座屈させ、高いエネルギー吸収効率で衝撃を吸収させることができる。また、側面部ごとに、板状部材の座屈の状態や衝撃エネルギーの吸収量に変化を持たせることもできる。そのため、エネルギー吸収部材の配設場所や配設状態や衝撃エネルギーの加わり方などを反映させつつ、エネルギー吸収部材を、軸方向に沿って一層均等に座屈させることができる。これにより、一層エネルギー吸収効率が高く、エネルギー吸収の度合いを自在に調節できるエネルギー吸収部材を提供できる。 In the present invention, at least one side surface portion of the plate-like member formed in a rectangular tube shape has a bulging portion that protrudes inward of the rectangular tube shape and a bulge that protrudes outward in the rectangular tube shape. By being formed in a mixed manner with the protruding portion, at least one side surface portion of the energy absorbing member exhibits high resistance against impact energy and buckles the plate-like member at a desired location, thereby absorbing high energy. Impact can be absorbed with efficiency. Further, for each side surface portion, the state of buckling of the plate-like member and the absorption amount of impact energy can be changed. Therefore, the energy absorbing member can be buckled more evenly along the axial direction while reflecting the location and state of the energy absorbing member and the way in which impact energy is applied. Thereby, it is possible to provide an energy absorbing member that has higher energy absorption efficiency and can freely adjust the degree of energy absorption.
　本発明において、板状部材に形成された、複数の膨出部が直線状に配列されてなる列のそれぞれに、筒状の内方に向かって突出された膨出部のみ、又は、筒状の外方に向かって突出された膨出部のみを形成することにより、膨出部が配列された列を基準にエネルギー吸収部材の座屈の位置や座屈の方向を調節できる。即ち、エネルギー吸収部材における座屈の位置や座屈の方向を、膨出部が配列された列や列同士の境界の位置の設定によって調整することができる。このため、エネルギー吸収部材の設計や製造が容易になり、高いエネルギー吸収効率を容易に得ることが可能になる。これにより、設計や製造を簡易に行えて、一層高いエネルギー吸収効率で衝撃を吸収しうるエネルギー吸収部材を提供できる。 In the present invention, only the bulging portion protruding inward of the cylindrical shape in each of the rows formed by the plate-like members, in which a plurality of bulging portions are linearly arranged, or the cylindrical shape By forming only the bulging portion protruding outward, the buckling position and the buckling direction of the energy absorbing member can be adjusted with reference to the row in which the bulging portions are arranged. In other words, the buckling position and the buckling direction of the energy absorbing member can be adjusted by setting the row where the bulging portions are arranged and the position of the boundary between the rows. For this reason, design and manufacture of an energy absorption member become easy, and it becomes possible to obtain high energy absorption efficiency easily. Thereby, it is possible to provide an energy absorbing member that can be easily designed and manufactured and can absorb an impact with higher energy absorption efficiency.
　本発明において、膨出部を配列された列は筒状の軸方向に対して略直交する方向に沿って形成することにより、軸方向に加わった衝撃エネルギーによって、膨出部の配列された列又は列同士の境界を基準に、膨出部同士が座屈の支障となることなく、板状部材を座屈させることができる。そして、膨出部の配列された列又は列同士の境界を基準に座屈させれば、おのずと板状部材は軸方向に沿って均等に座屈しながら衝撃エネルギーを吸収する。これにより、一層エネルギー吸収効率が高く、エネルギー吸収の度合いを自在に調節できるエネルギー吸収部材を提供できる。 In the present invention, the row in which the bulging portions are arranged is formed along a direction substantially orthogonal to the cylindrical axial direction, so that the row in which the bulging portions are arranged by the impact energy applied in the axial direction. Alternatively, the plate-like member can be buckled without causing the bulging portions to interfere with buckling with reference to the boundary between the rows. And if it buckles on the basis of the row | line | column with which the bulging part was arranged, or the boundary of row | line | columns, naturally a plate-shaped member will absorb impact energy, buckling equally along an axial direction. Thereby, it is possible to provide an energy absorbing member that has higher energy absorption efficiency and can freely adjust the degree of energy absorption.
　本発明において、筒状の外方に向かって突出された膨出部のみが形成されている列と、筒状の内方に向かって突出された膨出部のみが形成されている列とを交互に形成することにより、エネルギー吸収部材が座屈した際に、膨出部同士が干渉し合って座屈に支障をきたす事態を確実に防止しつつ、膨出部が配列された列同士の境界を確実に座屈させることで、エネルギー吸収部材を、軸方向に対して均等に座屈させることができる。これにより、一層エネルギー吸収効率が高く、エネルギー吸収の度合いを自在に調節できるエネルギー吸収部材を提供できる。 In the present invention, a column in which only the bulging portion protruding outward in the cylindrical shape is formed, and a row in which only the bulging portion protruding inward of the cylindrical shape is formed. By alternately forming, when the energy absorbing member buckles, the bulging portions interfere with each other and reliably prevent buckling, and the bulging portions are arranged between the rows. By buckling the boundary with certainty, the energy absorbing member can be buckled evenly in the axial direction. Thereby, it is possible to provide an energy absorbing member that has higher energy absorption efficiency and can freely adjust the degree of energy absorption.
　本発明において、各側面部において、筒状の外方に向かって突出された膨出部のみの列が連続的に形成される本数と、筒状の内方に向かって突出された膨出部のみの列が連続的に形成される本数とを、適当に設定することで、強度やエネルギー吸収量を容易に調整することができる。 In the present invention, in each side surface portion, the number of rows in which only the bulging portion protruding outward in the cylindrical shape is continuously formed, and the bulging portion protruding inward of the cylindrical shape By appropriately setting the number of lines in which only a single row is continuously formed, the strength and the energy absorption amount can be easily adjusted.
　本発明において、それぞれの膨出部を、外形が同一形状の正面視多角形に形成することにより、エネルギー吸収部材の板面方向に向けて外部から加わった衝撃に対する高い抗力を維持できる。また、エネルギー吸収部材の座屈時に、筒状の軸方向に対する折れ曲がりが起きにくくなる。更に、それぞれの膨出部は同一形状なので、製造が容易である。これにより、エネルギー吸収効率が高いエネルギー吸収部材を容易に形成できる。 In the present invention, it is possible to maintain a high resistance against an impact applied from the outside toward the plate surface direction of the energy absorbing member by forming each bulging portion in a front view polygon having the same outer shape. Further, when the energy absorbing member is buckled, bending with respect to the cylindrical axial direction is less likely to occur. Furthermore, since each bulge part is the same shape, manufacture is easy. Thereby, an energy absorption member with high energy absorption efficiency can be formed easily.
　本発明において、膨出部を、外形が正面視略六角形に形成することにより、板状部材に膨出部を密集させて、ハニカム構造を容易に形成できる。そのため、エネルギー吸収部材の板面方向に加わった衝撃に対し、非常に高い抗力を持たせることが容易になる。これにより、エネルギー吸収効率が高いエネルギー吸収部材を一層容易に提供できる。 In the present invention, by forming the bulging portion in a substantially hexagonal shape when viewed from the front, the bulging portion is densely packed in the plate-like member, and the honeycomb structure can be easily formed. Therefore, it becomes easy to give a very high resistance to the impact applied in the plate surface direction of the energy absorbing member. Thereby, an energy absorption member with high energy absorption efficiency can be provided more easily.
　本発明において、エネルギー吸収部材を、略全面にわたって、膨出部が隙間なく隣接して形成することにより、エネルギー吸収部材の略全面に渡り、衝撃に対する抗力が高く、エネルギー吸収効率の調整が容易に形成できる。これにより、エネルギー吸収効率が高く、エネルギー吸収の度合いを自在に調節できるエネルギー吸収部材を一層容易に提供できる。 In the present invention, the energy absorbing member is formed over substantially the entire surface so that the bulging portions are adjacent to each other with no gap, so that the energy absorbing member has a high resistance to impact over the entire surface of the energy absorbing member, and the energy absorption efficiency can be easily adjusted. Can be formed. As a result, an energy absorbing member that has high energy absorption efficiency and can freely adjust the degree of energy absorption can be provided more easily.
　本発明によれば、車両衝突時にバンパに作用する衝撃力をエネルギー吸収部材により有効に吸収させることができ、車体強度部材に伝達される衝撃力を極力低減できる。 According to the present invention, the impact force acting on the bumper at the time of a vehicle collision can be effectively absorbed by the energy absorbing member, and the impact force transmitted to the vehicle body strength member can be reduced as much as possible.
この発明の実施の形態１のエネルギー吸収部材の全体形状を示す図である。It is a figure which shows the whole energy absorption member of Embodiment 1 of this invention. 同実施の形態に係るエネルギー吸収部材の部分拡大図である。It is the elements on larger scale of the energy absorption member which concerns on the same embodiment. 図１のＡ－Ａ線に沿った部分断面図である。FIG. 2 is a partial sectional view taken along line AA in FIG. 図１のＢ－Ｂ断面図である。FIG. 3 is a cross-sectional view taken along the line BB in FIG. この発明の実施の形態１のエネルギー吸収部材が適用される自動車の部分拡大図である。It is the elements on larger scale of the motor vehicle to which the energy absorption member of Embodiment 1 of this invention is applied. この発明の実施の形態２のエネルギー吸収部材の全体形状を示す図である。It is a figure which shows the whole energy absorption member of Embodiment 2 of this invention. 図６のＣ－Ｃに沿った部分断面図である。FIG. 7 is a partial cross-sectional view taken along the line CC of FIG. 6. 図６のＤ－Ｄ断面図である。FIG. 7 is a DD cross-sectional view of FIG. 6. この発明の実施の形態３のエネルギー吸収部材の全体形状を示す図である。It is a figure which shows the whole energy absorption member of Embodiment 3 of this invention. 図９のＥ－Ｅ線に沿った部分断面図である。FIG. 10 is a partial cross-sectional view taken along line EE in FIG. 9. 図９のＦ－Ｆ断面図である。FIG. 10 is a sectional view taken along line FF in FIG. 9. この発明に係るエネルギー吸収部材、及び従来のエネルギー吸収部材のエネルギー吸収状態の実験結果を示すグラフである。It is a graph which shows the experimental result of the energy absorption state of the energy absorption member which concerns on this invention, and the conventional energy absorption member. この発明に係るエネルギー吸収部材、及び従来のエネルギー吸収部材のエネルギー吸収状態の実験結果を示すグラフである。It is a graph which shows the experimental result of the energy absorption state of the energy absorption member which concerns on this invention, and the conventional energy absorption member.
　［発明の実施の形態１］
　図１乃至図５に、この発明の実施の形態１を示す。 Embodiment 1 of the Invention
1 to 5 show a first embodiment of the present invention.
　まず構成を説明すると、図１に示す、この実施の形態１のエネルギー吸収部材１１Ａは、図５に示す、自動車１００のバンパの衝撃吸収用に用いられている。具体的には、このエネルギー吸収部材１１Ａは、図５に示す通り、自動車１００のエンジンルーム１０１の側部の下方に車両前後方向に延びる「車体強度部材」としてのサイドメンバ１０２とバンパ表皮１０３の内部に車幅方向に沿って延びるバンパ補強部材１０４との間に、車両前後方向に沿って配設されている。 First, the configuration will be described. The energy absorbing member 11A according to the first embodiment shown in FIG. 1 is used for shock absorption of a bumper of the automobile 100 shown in FIG. Specifically, as shown in FIG. 5, the energy absorbing member 11 </ b> A includes a side member 102 as a “body strength member” that extends in the vehicle front-rear direction below the side of the engine room 101 of the automobile 100 and a bumper skin 103. A bumper reinforcing member 104 extending along the vehicle width direction is disposed along the vehicle longitudinal direction.
　なお、図５においては、エネルギー吸収部材１１Ａを自動車１００のフロント側のサイドメンバ１０２とバンパ補強部材１０４との間に設ける構成を示しているが、エネルギー吸収部材１１Ａはリア側のサイドメンバ（図示せず）とバンパ補強部材（図示せず）との間に設けてもよい。 5 shows a configuration in which the energy absorbing member 11A is provided between the front side member 102 and the bumper reinforcing member 104 of the automobile 100, the energy absorbing member 11A is a rear side member (see FIG. 5). (Not shown) and a bumper reinforcing member (not shown) may be provided.
　エネルギー吸収部材１１Ａは、剛性が高く、塑性変形することで外部から加わった運動エネルギーを吸収できる、「板状部材」としての金属の板材によって形成されている。この実施の形態１では、エネルギー吸収部材１１Ａは、厚さ約１．２～２．０ミリメートルの鋼板によって形成される。ただし、エネルギー吸収部材１１Ａを構成する「板状部材」は、剛性と運動エネルギーの吸収特性の良好な性質を有する塑性材であれば、どのような材料で形成することもできる。例えば、鋼板、アルミメッキ鋼板、アルミニウム板と樹脂フィルム材とをラミネート構造にしたもの等、アルミニウム以外の金属、樹脂、およびそれらの合板等にて形成することもできる。 The energy absorbing member 11A is formed of a metal plate material as a “plate member” that has high rigidity and can absorb kinetic energy applied from the outside by plastic deformation. In the first embodiment, the energy absorbing member 11A is formed of a steel plate having a thickness of about 1.2 to 2.0 millimeters. However, the “plate member” constituting the energy absorbing member 11A can be formed of any material as long as it is a plastic material having good rigidity and kinetic energy absorption characteristics. For example, it can also be formed of a metal other than aluminum, such as a steel plate, an aluminized steel plate, a laminate of an aluminum plate and a resin film material, a resin, and a plywood thereof.
　エネルギー吸収部材１１Ａは、図１に示す通り、角筒形に形成されている。具体的には、エネルギー吸収部材１１Ａは、平板形状の板材が３つの平行な折り線、即ち図１及び図４に示す折り線２０（１），２０（２），２０（３）で略直角に折り曲げられて四角筒形に形成され、両側部をスポット溶接等で接合して折り線２０（４）を形成している。但し、エネルギー吸収部材１１Ａは、これ以外のどのような製造方法で製造されていてもよい。これにより、エネルギー吸収部材１１Ａは、４つの側面部１２（１），１２（２），１２（３），１２（４）を有する四角筒状の「板状部材」としての板材を備え、これらの側面部１２（１），１２（２），１２（３），１２（４）に囲まれた内側が中空であり、両端に開口部１３，１３が形成されたものとなっている。 The energy absorbing member 11A is formed in a rectangular tube shape as shown in FIG. Specifically, in the energy absorbing member 11A, the plate-shaped plate material is substantially perpendicular to three parallel fold lines, that is, fold lines 20 (1), 20 (2), and 20 (3) shown in FIGS. Are bent into a square cylinder, and both sides are joined by spot welding or the like to form a fold line 20 (4). However, the energy absorbing member 11A may be manufactured by any manufacturing method other than this. Accordingly, the energy absorbing member 11A includes a plate material as a “plate-shaped member” having a rectangular tube shape having four side surface portions 12 (1), 12 (2), 12 (3), and 12 (4). The inside surrounded by the side surface portions 12 (1), 12 (2), 12 (3), and 12 (4) is hollow, and the openings 13 and 13 are formed at both ends.
　エネルギー吸収部材１１Ａは、図示せぬボルト等によって図５に示すサイドメンバ１０２とバンパ補強部材１０４に固着されている。これにより、中心軸１４が自動車１００の前後方向に向くように配設される。 The energy absorbing member 11A is fixed to the side member 102 and the bumper reinforcing member 104 shown in FIG. Thus, the central shaft 14 is disposed so as to face the front-rear direction of the automobile 100.
　なお、エネルギー吸収部材１１Ａは、四角筒形に限らず、平面視（即ち開口部１３側から見た状態）で円形の筒状、五角形の筒状、六角形の筒状など、多角形の筒状であってもよい。また、エネルギー吸収部材１１Ａの内部が、軸方向に延びる仕切り部材によって仕切られていてもよい。更に、エネルギー吸収部材１１Ａは、どのような構成でサイドメンバ１０２及びバンパ補強部材１０４に固着されていてもよい。 The energy absorbing member 11A is not limited to a rectangular cylinder, but may be a polygonal cylinder such as a circular cylinder, a pentagonal cylinder, or a hexagonal cylinder in plan view (that is, viewed from the opening 13 side). It may be a shape. Further, the inside of the energy absorbing member 11A may be partitioned by a partition member extending in the axial direction. Further, the energy absorbing member 11A may be fixed to the side member 102 and the bumper reinforcing member 104 in any configuration.
　ただし、エネルギー吸収部材１１Ａは、剛性と運動エネルギーの吸収特性の良好な性質を有するものであれば、四角筒状等の筒状に限らず、どのような形状、構造にすることもできる。例えば、両端に板材が設けられて内部空間が密閉された形状であってもよいし、内部にウレタン等の材料が充填されて四角筒形や円筒形等に形成された構成とすることもできる。 However, the energy absorbing member 11A is not limited to a cylindrical shape such as a square cylindrical shape, and may have any shape and structure as long as it has good rigidity and kinetic energy absorption characteristics. For example, it may have a shape in which plate materials are provided at both ends and the internal space is sealed, or a structure such as a rectangular cylinder or a cylinder formed by filling a material such as urethane inside. .
　図１に示す通り、エネルギー吸収部材１１Ａの側面部１２（１），１２（２），１２（３），１２（４）において、板面の略全面には、プレス加工により、複数の膨出部１５が形成されている。 As shown in FIG. 1, in the side surface portions 12 (1), 12 (2), 12 (3), and 12 (4) of the energy absorbing member 11A, a plurality of bulges are formed on the substantially entire plate surface by press working. A portion 15 is formed.
　エネルギー吸収部材１１Ａの膨出部１５は正面視多角形である。この実施の形態１においては、図２に示す通り、それぞれの膨出部１５は、全て同一形状に形成されている。即ち、それぞれの膨出部１５は外形が正面視正六角形の同一形状であって、膨出の大きさが同一である。 The bulging portion 15 of the energy absorbing member 11A has a polygonal shape when viewed from the front. In the first embodiment, as shown in FIG. 2, all the bulging portions 15 are formed in the same shape. That is, each bulging portion 15 has the same external hexagonal shape when viewed from the front, and has the same bulging size.
　図２に示す通り、膨出部１５の三組の対向する角を結ぶ線上には、図３及び図４に示す通り、膨出部１５の突出方向に向けて傾斜する稜線１６が形成されている。図３及び図４に示す通り、これら稜線１６は膨出部１５の突出方向に湾曲する曲線を形成し、稜線１６の交点１７は、膨出方向の最高点となっている。膨出部１５の二つの稜線１６，１６と外形の一辺１８で囲まれた面は平面を形成する。 As shown in FIG. 2, on the line connecting the three opposing corners of the bulging portion 15, as shown in FIGS. 3 and 4, a ridge line 16 that is inclined toward the protruding direction of the bulging portion 15 is formed. Yes. As shown in FIGS. 3 and 4, these ridge lines 16 form a curve that curves in the protruding direction of the bulging portion 15, and the intersection 17 of the ridge lines 16 is the highest point in the bulging direction. The surface surrounded by the two ridgelines 16 and 16 of the bulging portion 15 and one side 18 of the outer shape forms a plane.
　膨出部１５は、自動車１００の衝突時に受ける衝突エネルギーの吸収が良好な形状及び大きさに形成されている。この実施の形態１においては、膨出部１５の外形の一辺が１２ミリメートル、高さが３ミリメートルに形成されている。ただし、膨出部１５は、衝突エネルギーの吸収状態が良好であればどのような外形や高さに形成されていてもよい。 The bulging portion 15 is formed in a shape and size that favorably absorb the collision energy received when the automobile 100 collides. In the first embodiment, one side of the outer shape of the bulging portion 15 is 12 millimeters and the height is 3 millimeters. However, the bulging portion 15 may be formed in any outer shape or height as long as the collision energy absorption state is good.
　膨出部１５は、エネルギー吸収部材１１Ａが座屈する際に、筒状の軸方向、つまり図１に示す中心軸１４に沿う方向、に対して折れ曲がりにくい態様で配設されている。具体的には、図１に示す通り、エネルギー吸収部材１１Ａの全域にわたって配設されている。 When the energy absorbing member 11A is buckled, the bulging portion 15 is arranged in a manner in which it does not easily bend in the cylindrical axial direction, that is, the direction along the central axis 14 shown in FIG. Specifically, as shown in FIG. 1, the energy absorbing member 11A is disposed over the entire area.
　全ての隣り合う膨出部１５は、互いに隙間なく隣接しており、いわゆるハニカム構造を形成する。但し、全ての隣り合う膨出部１５が、一定の間隙部を有して近接する構成（つまり、隣り合う膨出部１５の外形の一辺１８同士の間に、板材本来の平面部分が任意の幅だけ残存している構成）であってもよい。 All the adjacent bulging portions 15 are adjacent to each other without a gap, and form a so-called honeycomb structure. However, a configuration in which all the adjacent bulging portions 15 are close to each other with a certain gap (that is, the original flat portion of the plate material between the sides 18 of the outer shape of the adjacent bulging portions 15 is arbitrary. It may be a configuration in which only the width remains.
　そして、この実施の形態１において、エネルギー吸収部材１１Ａのそれぞれの側面部１２（１），１２（２），１２（３），１２（４）において、膨出部１５は、中心軸１４に略直交する方向を一つの列として、複数列配列された構成となっている。具体的には、図１に示すように、中心軸１４に略直交する方向に膨出部１５（１），１５（２），１５（３）が配列された第一の列１９（１）が形成され、第一の列１９（１）の直下に膨出部１５（４），１５（５），１５（６），１５（７）が配列された第二の列１９（２）が形成され、以下同様に第三の列１９（３）、第四の列１９（４）・・・がｎ列（ｎは自然数）形成されている。 And in this Embodiment 1, the bulging part 15 is substantially the center axis | shaft 14 in each side part 12 (1), 12 (2), 12 (3), 12 (4) of energy absorption member 11A. A plurality of rows are arranged with the orthogonal direction as one row. Specifically, as shown in FIG. 1, a first row 19 (1) in which bulging portions 15 (1), 15 (2), 15 (3) are arranged in a direction substantially orthogonal to the central axis 14 is provided. The second row 19 (2) in which the bulging portions 15 (4), 15 (5), 15 (6), 15 (7) are arranged immediately below the first row 19 (1) is formed. In the same manner, the third column 19 (3), the fourth column 19 (4),... Are formed in n columns (n is a natural number).
　エネルギー吸収部材１１Ａのそれぞれの側面部１２（１），１２（２），１２（３），１２（４）において、それぞれの列、例えば第一の列１９（１）、第二の列１９（２）・・・第ｎの列１９（ｎ）は、それぞれ、エネルギー吸収部材１１Ａの四角筒状の外方に向かって突出された膨出部１５のみが形成された列と、四角筒状の内方に向かって突出された膨出部１５のみが形成された列とが、交互に形成されている。例えば、図１において、第一の列１９（１）を形成する膨出部１５（１），１５（２），１５（３）は、全て、エネルギー吸収部材１１Ａの四角筒状の内方に向かって突出されており、第二の列１９（２）を形成する膨出部１５（４），１５（５），１５（６），１５（７）は、全て、エネルギー吸収部材１１Ａの四角筒状の外方に向かって突出されている。同様に、第三の列１９（３）を形成する膨出部１５は全てエネルギー吸収部材１１Ａの四角筒状の内側に向かって突出し、第四の列１９（４）を形成する膨出部１５は全てエネルギー吸収部材１１Ａの四角筒状の外方に向かって突出し、これらの構成が第ｎの列１９（ｎ）まで繰り返される。 In each side surface portion 12 (1), 12 (2), 12 (3), 12 (4) of the energy absorbing member 11A, each row, for example, the first row 19 (1), the second row 19 ( 2)... The nth row 19 (n) has a row in which only the bulging portion 15 projecting outward from the square tubular shape of the energy absorbing member 11A is formed, and a square tubular shape. The rows in which only the bulging portions 15 projecting inward are formed are alternately formed. For example, in FIG. 1, the bulging portions 15 (1), 15 (2), and 15 (3) forming the first row 19 (1) are all located inside the rectangular tube shape of the energy absorbing member 11 A. The bulging portions 15 (4), 15 (5), 15 (6), and 15 (7) that protrude toward the second row 19 (2) are all squares of the energy absorbing member 11A. It protrudes toward the outside of the tube. Similarly, all the bulging portions 15 forming the third row 19 (3) protrude toward the inner side of the rectangular tube shape of the energy absorbing member 11A, and the bulging portions 15 forming the fourth row 19 (4). Are protruded outward in the rectangular tube shape of the energy absorbing member 11A, and these configurations are repeated up to the nth row 19 (n).
　なお、この実施の形態１においては、それぞれの側面部１２（１），１２（２），１２（３），１２（４）に形成された各列が、互いに連続するように形成されている。そして、これらの列として、膨出部１５がエネルギー吸収部材１１Ａの四角筒状の外側に向けて突出している列と、膨出部１５がエネルギー吸収部材１１Ａの四角筒状の内側に向けて突出している列とが、交互に形成されている。 In the first embodiment, the columns formed on the side surface portions 12 (1), 12 (2), 12 (3), and 12 (4) are formed so as to be continuous with each other. . And as these rows, the bulging portion 15 protrudes toward the outside of the rectangular tube shape of the energy absorbing member 11A, and the bulging portion 15 protrudes toward the inside of the rectangular tube shape of the energy absorbing member 11A. The rows are alternately formed.
　従って、側面部が４面の場合、対向面同士の膨出部１５の同一列は突出方向が同じであり、隣接面の膨出部１５の同一列は突出方向が反対であるように構成される。例えば図４においては、側面部１２（１）の第一の列１９（１）、側面部１２（３）の第一の列１９（２１）を形成する膨出部１５は、エネルギー吸収部材１１Ａの四角筒状の内側に向けて突出し、側面部１２（２）の第一の列１９（１１）、側面部１２（４）の第一の列１９（３１）を形成する膨出部１５は、エネルギー吸収部材１１Ａの四角筒状の外側に向けて突出するように構成されている。 Therefore, when there are four side surfaces, the same row of the bulging portions 15 of the opposing surfaces has the same protruding direction, and the same row of the bulging portions 15 of the adjacent surfaces has the protruding direction opposite. The For example, in FIG. 4, the bulging part 15 which forms the 1st row | line 19 (1) of the side part 12 (1) and the 1st row | line 19 (21) of the side part 12 (3) is 11A of energy absorption members. Projecting toward the inside of the rectangular tube, and forming the first row 19 (11) of the side surface portion 12 (2) and the bulging portion 15 forming the first row 19 (31) of the side surface portion 12 (4), The energy absorbing member 11 </ b> A is configured to protrude toward the outside of the rectangular tube shape.
　但し、全ての面の同一列に配列された膨出部１５を、全て突出方向が同一になるように構成してもよい。 However, the bulging portions 15 arranged in the same row on all surfaces may be configured so that the protruding directions are all the same.
　次に、このエネルギー吸収部材１１Ａの作用について説明する。 Next, the operation of the energy absorbing member 11A will be described.
　自動車１００の前方からバンパ表皮１０３に衝撃荷重が作用すると、この衝撃荷重がバンパ補強部材１０４を介してエネルギー吸収部材１１Ａに伝達される。すると、エネルギー吸収部材１１Ａはサイドメンバ１０２よりも座屈荷重が小さく設定されているため、中心軸１４の方向に座屈し、サイドメンバ１０２への荷重の伝達を抑制することができる。 When an impact load is applied to the bumper skin 103 from the front of the automobile 100, the impact load is transmitted to the energy absorbing member 11A via the bumper reinforcing member 104. Then, since the energy absorbing member 11 </ b> A is set to have a buckling load smaller than that of the side member 102, the energy absorbing member 11 </ b> A can buckle in the direction of the central axis 14 and suppress transmission of the load to the side member 102.
　ここで、エネルギー吸収部材１１Ａは、それぞれの側面部１２（１），１２（２），１２（３），１２（４）の略全面にわたって膨出部１５が複数設けられているため、衝突初期の軸抗力を低減させることができる。即ち、それぞれの膨出部１５が正面視略六角形で、それぞれの頂点部分と稜線１６の交点１７とが略三角形を形成し、かつ、複数の膨出部１５がハニカム構造を形成しているため、側面部１２（１），１２（２），１２（３），１２（４）の面方向に沿って加わった力に対して高い抗力を奏する。また、膨出部１５の外周部が座屈時の基準位置になる（つまり、エネルギー吸収部材１１Ａは、側面部１２（１），１２（２），１２（３），１２（４）の面方向に沿って加わった力に対し、一辺１８の部分から座屈が起こり易いように構成されている）ため、全体が平板状に形成されたエネルギー吸収部材の場合と違い、膨出部１５の大きさや配設位置等を調節することで、エネルギー吸収の度合いを、エネルギー吸収部材１１Ａの壁の長さ、板厚、材質のみに依存せずに調節することができる。 Here, since the energy absorbing member 11A is provided with a plurality of bulging portions 15 over substantially the entire surface of each of the side surface portions 12 (1), 12 (2), 12 (3), 12 (4), the initial stage of the collision It is possible to reduce the axial drag. That is, each bulging portion 15 is substantially hexagonal when viewed from the front, each vertex portion and the intersection 17 of the ridge line 16 form a substantially triangular shape, and the plurality of bulging portions 15 form a honeycomb structure. Therefore, there is a high resistance against the force applied along the surface direction of the side surfaces 12 (1), 12 (2), 12 (3), 12 (4). Moreover, the outer peripheral part of the bulging part 15 becomes a reference position at the time of buckling (that is, the energy absorbing member 11A is a surface of the side parts 12 (1), 12 (2), 12 (3), 12 (4). Unlike the case of the energy absorbing member formed entirely in a flat plate shape, the buckling portion 15 of the bulging portion 15 is different. By adjusting the size, the arrangement position, and the like, the degree of energy absorption can be adjusted without depending only on the wall length, plate thickness, and material of the energy absorbing member 11A.
　また、膨出部１５はエネルギー吸収部材１１Ａの略全面に設けられているので、エネルギー吸収部材１１Ａの全面において、高いエネルギー吸収効率を得ることができ、かつ、側面部１２（１），１２（２），１２（３），１２（４）の全てにわたりほぼ等しい強度を有する。 Further, since the bulging portion 15 is provided on substantially the entire surface of the energy absorbing member 11A, high energy absorption efficiency can be obtained on the entire surface of the energy absorbing member 11A, and the side surface portions 12 (1), 12 ( 2), 12 (3), and 12 (4) have almost equal strength.
　また、エネルギー吸収部材１１Ａは、膨出部１５の中央部分に比べて、隣接する複数の膨出部１５の境界部分が座屈しやすいので、膨出部１５の一辺１８にあたる部分が折れ曲がる形で座屈が進行することになる。そして、座屈する地点（すなわち、エネルギー吸収部材１１Ａの座屈の数）が多いほど、衝撃エネルギーの吸収量が多くなる。従って、この実施の形態１のエネルギー吸収部材１１Ａは、従来のクラッシュビードが設けられたエネルギー吸収部材（特許文献１参照）に比べ、高いエネルギー吸収効率で衝突エネルギーを吸収する。 In addition, since the energy absorbing member 11 </ b> A is more likely to buckle at the boundary portion between the plurality of adjacent bulging portions 15 than the central portion of the bulging portion 15, the portion corresponding to one side 18 of the bulging portion 15 is bent. Bending will progress. As the number of buckling points (that is, the number of bucklings of the energy absorbing member 11A) increases, the amount of shock energy absorbed increases. Therefore, 11 A of energy absorption members of this Embodiment 1 absorb collision energy with high energy absorption efficiency compared with the energy absorption member (refer patent document 1) provided with the conventional crash bead.
　さらに、エネルギー吸収部材１１Ａには、中心軸１４に略直交する方向に、膨出部１５が、第一の列１９（１）、第二の列１９（２）・・・第ｎの列１９（ｎ）を形成しているため、中心軸１４に沿って加わった衝撃エネルギーにより、エネルギー吸収部材１１Ａは、第一の列１９（１）、第二の列１９（２）・・・第ｎの列１９（ｎ）を基準に座屈する。このとき、第一の列１９（１）、第二の列１９（２）・・・第ｎの列１９（ｎ）が蛇腹状に折れ曲がる場合が多くなるが、その場合、隣り合う列の膨出部１５（例えば第一の列１９（１）の膨出部１５（１）～１５（３）の突出方向と第二の列の膨出部１５（４）～１５（７））の突出方向が、外方と内方とが交互に形成されているため、エネルギー吸収部材１１Ａが座屈した際に、隣り合う列の膨出部１５同士が干渉しあって座屈を妨げることがない。そのため、エネルギー吸収部材１１Ａは、第二の列１９（２）・・・第ｎの列１９（ｎ）を基準に蛇腹状に座屈する。 Further, the energy absorbing member 11A has a bulging portion 15 in a direction substantially orthogonal to the central axis 14, the first row 19 (1), the second row 19 (2),... The n th row 19. Since (n) is formed, the energy absorbing member 11A has the first row 19 (1), the second row 19 (2)... Nth by the impact energy applied along the central axis 14. Buckle with reference to column 19 (n). At this time, the first row 19 (1), the second row 19 (2),..., The nth row 19 (n) are often bent in a bellows shape. Projection direction of the protruding portion 15 (for example, the protruding direction of the bulging portions 15 (1) to 15 (3) of the first row 19 (1) and the protruding portion 15 (4) to 15 (7) of the second row Since the directions are alternately formed on the outer side and the inner side, when the energy absorbing member 11A is buckled, the bulging portions 15 of adjacent rows do not interfere with each other to prevent buckling. . Therefore, the energy absorbing member 11A buckles in a bellows shape with reference to the second row 19 (2)... Nth row 19 (n).
　このように、エネルギー吸収部材１１Ａは、衝撃が加わった際、エネルギー吸収部材１１Ａは、中心軸１４に対して折れ曲がることが抑制されつつ、座屈前の中心軸１４の軸方向に均等に座屈して、高いエネルギー吸収効率を得ることができる。 As described above, the energy absorbing member 11A buckles evenly in the axial direction of the central axis 14 before buckling while the energy absorbing member 11A is prevented from being bent with respect to the central axis 14 when an impact is applied. Thus, high energy absorption efficiency can be obtained.
　以上、この実施の形態１においては、エネルギー吸収部材１１Ａを構成する板材に複数の膨出部１５が隣接又は近接した状態で形成されていることにより、膨出部１５の形状や大きさを調節することで、エネルギー吸収部材１１Ａが衝撃を受けた際の座屈状態や座屈強度が適切な状態になるように自在に調節できる。また、膨出部１５が隣接又は近接した状態で形成されていることにより、外部からの衝撃に対し、膨出部１５によって衝撃に対する高い抗力を奏すると共に、膨出部１５，１５同士の境界において座屈が容易になる。このため、板状部材を所望の箇所で座屈させ、かつ、高いエネルギー吸収効率で衝撃を吸収させることができる。更に、エネルギー吸収部材１１Ａには、四角筒状の内方に向かって突出する膨出部１５と四角筒状の外方に向かって突出する膨出部１５とが混在して形成されていることにより、エネルギー吸収部材１１Ａが座屈した際に膨出部１５同士が干渉し合ってしまい、エネルギー吸収部材１１Ａが中心軸１４の軸方向に対して折れ曲がって座屈することを抑止できる。これにより、エネルギー吸収効率が高く、エネルギー吸収の度合いを自在に調節できるエネルギー吸収部材１１Ａを提供できる。 As mentioned above, in this Embodiment 1, the shape and magnitude | size of the bulging part 15 are adjusted by the several bulging part 15 being formed in the state which adjoined or adjoined to the board | plate material which comprises 11 A of energy absorption members. By doing so, the buckling state and the buckling strength when the energy absorbing member 11A receives an impact can be freely adjusted. Further, since the bulging portion 15 is formed in a state of being adjacent or close to the bulging portion 15, the bulging portion 15 provides a high resistance against the impact against the external impact, and at the boundary between the bulging portions 15 and 15. Buckling becomes easy. For this reason, a plate-shaped member can be buckled at a desired location, and an impact can be absorbed with high energy absorption efficiency. Further, the energy absorbing member 11A is formed with a mixture of a bulging portion 15 projecting inward of the rectangular tube shape and a bulging portion 15 projecting outward of the square tube shape. Thus, when the energy absorbing member 11A is buckled, the bulging portions 15 interfere with each other, and the energy absorbing member 11A can be prevented from being bent and buckled with respect to the axial direction of the central axis 14. Thereby, energy absorption member 11A which has high energy absorption efficiency and can freely adjust the degree of energy absorption can be provided.
　この実施の形態１においては、四角筒状に形成されたエネルギー吸収部材１１Ａの少なくとも一つの側面部には、四角筒状の内方に向かって突出する膨出部１５（例えば膨出部１５（１））と四角筒状の外方に向かって突出する膨出部１５（例えば膨出部１５（４））とが混在して形成されていることにより、エネルギー吸収部材１１Ａの少なくとも一つの側面部例えば側面部１２（１）において、衝撃エネルギーに対して高い抗力を奏させると共にエネルギー吸収部材１１Ａを所望の箇所で座屈させ、高いエネルギー吸収効率で衝撃を吸収させることができる。また、側面部１２（１）～１２（４）ごとに、エネルギー吸収部材１１Ａの座屈の状態や衝撃エネルギーの吸収量に変化を持たせることもできる。そのため、エネルギー吸収部材１１Ａの配設場所や配設状態や衝撃エネルギーの加わり方などを反映させつつ、エネルギー吸収部材１１Ａを、中心軸１４の軸方向に沿って一層均等に座屈させることができる。これにより、一層エネルギー吸収効率が高く、エネルギー吸収の度合いを自在に調節できるエネルギー吸収部材１１Ａを提供できる。 In the first embodiment, at least one side surface portion of the energy absorbing member 11A formed in a square tube shape has a bulge portion 15 (for example, a bulge portion 15 ( 1)) and the bulging portion 15 (for example, the bulging portion 15 (4)) that protrudes outward in the shape of a rectangular tube are formed in a mixed manner, so that at least one side surface of the energy absorbing member 11A is formed. In the portion, for example, the side surface portion 12 (1), it is possible to exert a high resistance against the impact energy and to buckle the energy absorbing member 11A at a desired location to absorb the impact with high energy absorption efficiency. Further, for each of the side surfaces 12 (1) to 12 (4), it is possible to change the buckling state of the energy absorbing member 11A and the amount of shock energy absorbed. Therefore, the energy absorbing member 11A can be buckled more evenly along the axial direction of the central axis 14 while reflecting the arrangement location and arrangement state of the energy absorbing member 11A, how to apply impact energy, and the like. . As a result, the energy absorbing member 11A having higher energy absorption efficiency and capable of freely adjusting the degree of energy absorption can be provided.
　この実施の形態１においては、エネルギー吸収部材１１Ａに形成された、複数の膨出部１５が一直線状に配列された第一の列１９（１）、第二の列１９（２）・・・第ｎの列１９（ｎ）のそれぞれには、四角筒状の内方に向かって突出された膨出部１５のみ、又は、四角筒状の外方に向かって突出された膨出部１５のみが形成されていることにより、膨出部１５が配列された列を基準にエネルギー吸収部材１１Ａの座屈の位置や座屈の方向を調節できる。即ち、エネルギー吸収部材１１Ａにおける座屈の位置や座屈の方向を、膨出部１５が配列された第一の列１９（１）、第二の列１９（２）・・・第ｎの列１９（ｎ）や第一の列１９（１）、第二の列１９（２）・・・第ｎの列１９（ｎ）同士の境界の位置の設定によって調整することができるため、エネルギー吸収部材１１Ａの設計や製造が容易になり、高いエネルギー吸収効率を容易に得ることが可能になる。これにより、設計や製造を簡易に行えて、一層高いエネルギー吸収効率で衝撃を吸収しうるエネルギー吸収部材１１Ａを提供できる。 In the first embodiment, the first row 19 (1), the second row 19 (2), etc., formed on the energy absorbing member 11A, in which a plurality of bulging portions 15 are arranged in a straight line. Each of the nth rows 19 (n) has only a bulging portion 15 projecting inwardly in the shape of a square tube or only a bulging portion 15 projecting outward in the shape of a square tube. The buckling position and the buckling direction of the energy absorbing member 11A can be adjusted with reference to the row in which the bulging portions 15 are arranged. That is, the position of buckling and the direction of buckling in the energy absorbing member 11A are shown in the first row 19 (1), the second row 19 (2),. 19 (n), the first column 19 (1), the second column 19 (2)... Can be adjusted by setting the position of the boundary between the nth columns 19 (n). The member 11A can be easily designed and manufactured, and high energy absorption efficiency can be easily obtained. Thereby, 11 A of energy absorption members which can perform design and manufacture easily and can absorb an impact with higher energy absorption efficiency can be provided.
　この実施の形態１においては、四角筒状の外方に向かって突出された膨出部１５のみが形成されている列、例えば第二の列１９（２）、第四の列１９（４）と、四角筒状の内方に向かって突出された膨出部１５のみが形成されている列、例えば第一の列１９（１）、第三の列１９（３）とが交互に形成されたことにより、エネルギー吸収部材１１Ａが座屈した際に、膨出部１５同士が干渉し合って座屈に支障をきたす事態を確実に防止しつつ、膨出部１５が配列された第一の列１９（１）、第二の列１９（２）・・・第ｎの列１９（ｎ）同士の境界を確実に座屈させることで、エネルギー吸収部材を１１、中心軸１４の軸方向に対して均等に座屈させることができる。これにより、一層エネルギー吸収効率が高く、エネルギー吸収の度合いを自在に調節できるエネルギー吸収部材１１Ａを提供できる。 In the first embodiment, a row in which only the bulging portion 15 protruding outward in the shape of a square tube is formed, for example, the second row 19 (2), the fourth row 19 (4). And rows in which only the bulging portions 15 projecting inwardly in the shape of a square cylinder are formed, for example, the first row 19 (1) and the third row 19 (3) are alternately formed. As a result, when the energy absorbing member 11A is buckled, the bulging portions 15 are arranged while the bulging portions 15 interfere with each other to prevent buckling. The column 19 (1), the second column 19 (2),..., By securely buckling the boundary between the nth columns 19 (n), the energy absorbing member 11 is arranged in the axial direction of the central axis 14. On the other hand, it can be buckled evenly. As a result, the energy absorbing member 11A having higher energy absorption efficiency and capable of freely adjusting the degree of energy absorption can be provided.
　この実施の形態１においては、膨出部１５が配列された第一の列１９（１）、第二の列１９（２）・・・第ｎの列１９（ｎ）は四角筒状の中心軸１４の軸方向に対して略直交する方向に沿って形成されたことにより、中心軸１４の軸方向に加わった衝撃エネルギーにより、膨出部１５の配列された第一の列１９（１）、第二の列１９（２）・・・第ｎの列１９（ｎ）又は第一の列１９（１）、第二の列１９（２）・・・第ｎの列１９（ｎ）同士の境界を基準に、膨出部１５同士が座屈の支障となることなく、板状部材を座屈させることができる。そして、膨出部１５の配列された第一の列１９（１）、第二の列１９（２）・・・第ｎの列１９（ｎ）又は第一の列１９（１）、第二の列１９（２）・・・第ｎの列１９（ｎ）同士の境界を基準に座屈させれば、おのずとエネルギー吸収部材１１Ａは中心軸１４の軸方向に沿って均等に座屈しながら衝撃エネルギーを吸収する。これにより、一層エネルギー吸収効率が高く、エネルギー吸収の度合いを自在に調節できるエネルギー吸収部材１１Ａを提供できる。 In the first embodiment, the first row 19 (1), the second row 19 (2),..., The nth row 19 (n) in which the bulging portions 15 are arranged have a square cylindrical center. The first row 19 (1) in which the bulging portions 15 are arranged by the impact energy applied in the axial direction of the central shaft 14 by being formed along a direction substantially orthogonal to the axial direction of the shaft 14. , Second column 19 (2)... Nth column 19 (n) or first column 19 (1), second column 19 (2)... Nth column 19 (n) The plate-like member can be buckled without the bulging portions 15 becoming a hindrance to buckling, with reference to the boundary of. And the 1st row | line | column 19 (1) in which the bulging part 15 was arranged, the 2nd row | line 19 (2) ... n-th row | line 19 (n) or the 1st row | line 19 (1), 2nd row | line | column If the buckling is performed with reference to the boundary between the nth rows 19 (n), the energy absorbing member 11A naturally impacts while buckling evenly along the axial direction of the central axis 14. Absorb energy. As a result, the energy absorbing member 11A having higher energy absorption efficiency and capable of freely adjusting the degree of energy absorption can be provided.
　なお、この実施の形態１においては、側面部１２（１）～１２（４）のそれぞれに、中心軸１４の軸方向に略直交する方向に膨出部１５を配列した列を形成し、この列ごとに、四角筒状の内方に向かって突出する膨出部１５のみ、四角筒状の外方に向かって突出する膨出部１５のみを交互に配列する構成としたが、このような構成が、側面部１２（１）～１２（４）のうちの一部の面にのみ形成されている態様としてもよい。 In the first embodiment, each of the side surface portions 12 (1) to 12 (4) is formed with a row in which the bulging portions 15 are arranged in a direction substantially perpendicular to the axial direction of the central axis 14. For each row, only the bulging portions 15 projecting inward in the rectangular tube shape and only the bulging portions 15 projecting outward in the square tube shape are alternately arranged. The configuration may be such that the structure is formed only on a part of the side surfaces 12 (1) to 12 (4).
　［発明の実施の形態２］
　図６乃至図８に、この発明の実施の形態２を示す。 [Embodiment 2 of the Invention]
6 to 8 show a second embodiment of the present invention.
　この実施の形態２のエネルギー吸収部材１１Ｂにおいては、第一の列１９（１）、第二の列（２）・・・第ｎの列１９（ｎ）に配列された膨出部１５の突出方向が実施の形態１と相違する。 In the energy absorbing member 11B of the second embodiment, the protrusions of the bulging portions 15 arranged in the first row 19 (1), the second row (2)... The nth row 19 (n). The direction is different from that of the first embodiment.
　即ち、図６に全体図を示す、実施の形態２のエネルギー吸収部材１１Ｂは、図７に示すように、第一の列１９（１）及び第二の列１９（２）を形成する膨出部１５は全てエネルギー吸収部材１１の四角筒状の内方に向かって突出し、第三の列１９（３）及び第四の列１９（４）を形成する膨出部１５は全てエネルギー吸収部材１１の四角筒状の外方に向かって突出し・・・というように、２列ごとに、膨出部１５が外方と内方に交互に突出する構成を備えている。 That is, as shown in FIG. 7, the energy absorbing member 11B according to the second embodiment, the entire view of which is shown in FIG. 6, is a bulge that forms the first row 19 (1) and the second row 19 (2). All the portions 15 protrude toward the inside of the rectangular tube shape of the energy absorbing member 11, and all the bulging portions 15 forming the third row 19 (3) and the fourth row 19 (4) are all in the energy absorbing member 11. The bulging portion 15 has a configuration in which the bulging portion 15 alternately protrudes outward and inward every two rows.
　その他の構成は、実施の形態１と同じである。 Other configurations are the same as those in the first embodiment.
　このように構成することで、エネルギー吸収部材１１Ｂを、配設する自動車１００の部位や形状、大きさに応じて、強度やエネルギー吸収量を調整することができる。 With this configuration, the strength and energy absorption amount can be adjusted according to the location, shape, and size of the automobile 100 in which the energy absorbing member 11B is disposed.
　なお、配設する自動車１００の部位や形状、大きさによっては、エネルギー吸収部材１１Ｂに替えて、エネルギー吸収部材を、３列ごとに、あるいは４列以上の列ごとに、膨出部１５が外方と内方に交互に突出する構成とすることもできる。 Depending on the location, shape, and size of the automobile 100 to be disposed, the bulging portion 15 is not provided in every three rows or every four or more rows instead of the energy absorbing member 11B. It can also be set as the structure which protrudes inward and inward alternately.
　［発明の実施の形態３］
　図９乃至図１１に、この発明の実施の形態３を示す。 Embodiment 3 of the Invention
9 to 11 show a third embodiment of the present invention.
　この実施の形態３のエネルギー吸収部材１１Ｃにおいても、第一の列１９（１）、第二の列１９（２）・・・第ｎの列１９（ｎ）に配列された膨出部１５の突出方向が実施の形態１及び２と相違する。 Also in the energy absorbing member 11C of the third embodiment, the bulging portions 15 arranged in the first row 19 (1), the second row 19 (2)... The nth row 19 (n). The protruding direction is different from the first and second embodiments.
　即ち、図９に全体図を示す、実施の形態３のエネルギー吸収部材１１Ｃは、図１０に示すように、側面部１２（３）において第一の列１９（３１）乃至第三の列１９（３３）を形成する膨出部１５、第六の列１９（３６）及び第七の列１９（３７）を形成する膨出部１５、第九の列１９（３９）を形成する膨出部１５は全てエネルギー吸収部材１１の四角筒状の外方に向かって突出し、第四及び第五の列１９（３４），１９（３５）、及び第八の列１９（３８）は全てエネルギー吸収部材１１の四角筒状の内方に向かって突出する構成を備えている。即ち、エネルギー吸収部材１１の四角筒状の外方に向かって突出する膨出部１５が配列された列は３列ごと、２列ごと、１列ごとと変化する構成となっている。 That is, the energy absorbing member 11C of the third embodiment, which is shown in FIG. 9 as an overall view, has a first row 19 (31) to a third row 19 (in the side surface portion 12 (3) as shown in FIG. 33), the bulging portion 15 forming the sixth row 19 (36) and the seventh row 19 (37), and the bulging portion 15 forming the ninth row 19 (39). All protrude outwardly of the rectangular tube shape of the energy absorbing member 11, and the fourth and fifth rows 19 (34), 19 (35), and the eighth row 19 (38) are all in the energy absorbing member 11. The structure which protrudes toward the inside of a rectangular tube shape is provided. That is, the rows of the energy absorbing member 11 in which the bulging portions 15 projecting outward in the rectangular tube shape are arranged to change every three rows, every two rows, and every row.
　その他の構成は実施の形態１及び２と同じである。 Other configurations are the same as those in the first and second embodiments.
　このように構成することで、エネルギー吸収部材１１Ｃを、配設する自動車１００の部位や形状、大きさに応じて、強度やエネルギー吸収量を調整することができる。 With this configuration, the energy absorption member 11C can be adjusted in strength and energy absorption amount according to the location, shape, and size of the automobile 100 to be disposed.
　なお、配設する自動車１００の部位や形状、大きさによっては、エネルギー吸収部材１１Ｃの列の配列態様をさらに変化させ、異なる規則や、不規則な列態様とすることもできる。 It should be noted that depending on the location, shape, and size of the automobile 100 to be arranged, the arrangement of the energy absorbing members 11C may be further changed to have different rules or irregular arrangements.
　なお、上記各実施の形態では、エネルギー吸収部材１１Ａ，１１Ｂ，１１Ｃは自動車１００のサイドメンバ１０２とバンパ補強部材１０４との間に設ける構成としたが、これらエネルギー吸収部材１１Ａ，１１Ｂ，１１Ｃを車体の他の部位に設けることもできる。また、エネルギー吸収部材１１Ａ，１１Ｂ，１１Ｃを、自動車以外のものに適用することもできる。 In each of the above-described embodiments, the energy absorbing members 11A, 11B, and 11C are provided between the side member 102 and the bumper reinforcing member 104 of the automobile 100. However, the energy absorbing members 11A, 11B, and 11C are mounted on the vehicle body. It can also be provided in other parts. Moreover, energy absorption member 11A, 11B, 11C can also be applied to things other than a motor vehicle.
　上記各実施の形態は本発明の例示であり、本発明が上記各実施の形態に限定されることを意味するものではないことは、いうまでもない。 The above embodiments are examples of the present invention, and it is needless to say that the present invention is not limited to the above embodiments.
　［実施例］
　ここで、図１２及び図１３に、この発明に係るエネルギー吸収部材のエネルギー吸収状態の実験結果を示す。この実施例においては、本発明の代表例として、実施の形態１におけるエネルギー吸収部材１１Ａによる実験の結果を示す。なお、図１２において縦軸は反力（単位ｋＮ）、横軸はストローク（単位ｍｍ）であり、図１３において縦軸は吸収ＥＡ量（単位Ｊ）、横軸はストローク（単位ｍｍ）である。即ち、図１２は、エネルギー吸収部材の座屈に伴う長さの縮小と反力との関係を示したものであり、図１３は、エネルギー吸収部材の座屈に伴う長さの縮小と吸収されたエネルギー量との関係を示したものである。 [Example]
Here, FIG.12 and FIG.13 shows the experimental result of the energy absorption state of the energy absorption member which concerns on this invention. In this example, as a representative example of the present invention, a result of an experiment using the energy absorbing member 11A in the first embodiment is shown. In FIG. 12, the vertical axis is the reaction force (unit kN), the horizontal axis is the stroke (unit mm), the vertical axis in FIG. 13 is the absorbed EA amount (unit J), and the horizontal axis is the stroke (unit mm). . That is, FIG. 12 shows the relationship between the reduction in length due to buckling of the energy absorbing member and the reaction force, and FIG. 13 shows the relationship between the reduction in length accompanying buckling of the energy absorbing member and the absorption. It shows the relationship with the amount of energy.
　同図において、符号１１０は、本発明のエネルギー吸収部材１１Ａについて、一端を固定部材に取り付け、他端側から７００ｋｇの剛体を１．３mの高さから自由落下させ、初速１８．２ｋｍ／ｈで軸圧潰させたときの反力の変化、及び吸収エネルギーの変化の状態を示している。なお、実験で用いたこの実施の形態１のエネルギー吸収部材１１Ａは、ＳＰＣ４４０Ｗ／１．８ｔ及び１．６ｔ（ＹＰ：３５５ＭＰａ，ＴＳ：４８３ＭＰａ，Ｅｌ：３３％）の鋼材によって形成されている。また、このエネルギー吸収部材１１Ａの一辺の長さは８０ｍｍである。 In the figure, reference numeral 110 denotes an energy absorbing member 11A of the present invention, with one end attached to a fixed member, a 700 kg rigid body freely dropped from a height of 1.3 m from the other end side, and an initial speed of 18.2 km / h. A change in reaction force and a change in absorbed energy when the shaft is crushed are shown. The energy absorbing member 11A of the first embodiment used in the experiment is formed of steel materials of SPC440W / 1.8t and 1.6t (YP: 355 MPa, TS: 483 MPa, El: 33%). The length of one side of the energy absorbing member 11A is 80 mm.
　図１２及び図１３には、更に、比較例としてのエネルギー吸収部材のエネルギー吸収状態の実験結果を示す。 12 and 13 further show experimental results of the energy absorption state of an energy absorbing member as a comparative example.
　符号１２０は、第１の比較例としてのエネルギー吸収部材（図示せず）の実験結果である。当該エネルギー吸収部材の材質、形状、直径はこの実施の形態１のエネルギー吸収部材１１Ａと同じだが、膨出部１５のない平板で形成された点が相違する。 Numeral 120 is an experimental result of an energy absorbing member (not shown) as a first comparative example. The material, shape, and diameter of the energy absorbing member are the same as those of the energy absorbing member 11A of the first embodiment, except that the energy absorbing member is formed of a flat plate without the bulging portion 15.
　符号１３０は、第２の比較例としてのエネルギー吸収部材（図示せず）の実験結果である。当該エネルギー吸収部材の材質、形状、直径はこの実施の形態１のエネルギー吸収部材１１Ａと同じだが、膨出部１５に替えて、特許文献１に記載されたエネルギー吸収部材と同様にクラッシュビードが設けられたものである点が相違する。 Numeral 130 is an experimental result of an energy absorbing member (not shown) as a second comparative example. Although the material, shape, and diameter of the energy absorbing member are the same as those of the energy absorbing member 11A of the first embodiment, a crush bead is provided in the same manner as the energy absorbing member described in Patent Document 1 instead of the bulging portion 15. The difference is that
　第１及び第２の比較例に対する実験内容は、この実施の形態１のエネルギー吸収部材１１Ａに対する実験内容と同じである。 The experiment contents for the first and second comparative examples are the same as the experiment contents for the energy absorbing member 11A of the first embodiment.
　図１２の符号１１０の線に示す通り、実施の形態１のエネルギー吸収部材１１Ａが座屈したときは、初期抗力のピーク値（符号１１１に示す縦軸方向の位置）は低くなっている。一方、ピーク値の後の反力の値は、初期抗力とほぼ同等の値を示している。そして、図１３において符号１１０が示す通り、本発明のエネルギー吸収部材１１Ａの吸収エネルギー総量（符号１１０の線と横軸との間の面積の値に等しい）は、大きな値を示している。 As shown by the line 110 in FIG. 12, when the energy absorbing member 11A of the first embodiment is buckled, the peak value of the initial drag (position in the vertical axis direction shown by the code 111) is low. On the other hand, the value of the reaction force after the peak value is almost equal to the initial drag. And as the code | symbol 110 shows in FIG. 13, the absorbed energy total amount (equal to the value of the area between the line | wire of a code | symbol 110, and a horizontal axis) of 11 A of energy absorption members of this invention has shown the big value.
　即ち、本願発明のエネルギー吸収部材１１は、初期抗力を小さく押さえつつ、吸収エネルギー総量を大きくすることができることが判る。 That is, it can be seen that the energy absorbing member 11 of the present invention can increase the total amount of absorbed energy while keeping the initial drag small.
　これに対し、図１２の符号１２０の線に示す通り、第一の比較例のエネルギー吸収部材が座屈したときは、初期抗力のピーク値１２１の値が大きく、その後の抗力の値が急激に小さくなっている。また、図１３の符号１２０の線に示す通り、第一の比較例の吸収エネルギー総量は、最も小さいものとなっている。 On the other hand, as shown by the line 120 in FIG. 12, when the energy absorbing member of the first comparative example is buckled, the initial drag peak value 121 is large and the subsequent drag value is abrupt. It is getting smaller. Further, as shown by the line 120 in FIG. 13, the total amount of absorbed energy of the first comparative example is the smallest.
　即ち、第一の比較例のエネルギー吸収部材は、初期抗力が非常に大きく、吸収エネルギー総量が小さいものであることが判る。 That is, it can be seen that the energy absorbing member of the first comparative example has a very large initial drag and a small amount of absorbed energy.
　また、図１２の符号１３０の線に示す通り、第二の比較例のエネルギー吸収部材が座屈したときは、初期抗力のピーク値１３１の値は本発明の初期抗力のピーク値と同等だが、その後の抗力の値は急激に小さくなっている。また、図１３の符号１３０の線に示す通り、第二の比較例のエネルギー吸収量は、第一の比較例とほぼ同等の小さいものとなっている。 In addition, as shown by the line 130 in FIG. 12, when the energy absorbing member of the second comparative example is buckled, the value of the initial drag peak value 131 is equivalent to the initial drag peak value of the present invention. Subsequent drag values have decreased rapidly. Further, as shown by the line 130 in FIG. 13, the energy absorption amount of the second comparative example is as small as that of the first comparative example.
　即ち、第二の比較例のエネルギー吸収部材は、初期抗力は比較的小さく押さえられるものの、吸収エネルギー総量が小さいものであることが判る。 That is, it can be seen that the energy absorbing member of the second comparative example has a small amount of absorbed energy although the initial drag is relatively small.
　以上により、本発明のエネルギー吸収部材１１は、初期抗力が小さく、吸収エネルギー総量の大きい、エネルギー吸収部材としての性能が高いものであることが確認された。 From the above, it was confirmed that the energy absorbing member 11 of the present invention has a low initial drag, a large amount of absorbed energy, and a high performance as an energy absorbing member.
　１１Ａ，１１Ｂ，１１Ｃ・・・エネルギー吸収部材
　１２（１），１２（２），１２（３），１２（４）・・・側面部
　１４・・・中心軸（軸）
　１５，１５（１），１５（２），１５（３），１５（４），１５（５），１５（６），１５（７），１５（８），１５（９）・・・膨出部
　１９，１９（１），１９（２），１９（３），１９（４），１９（ｎ）・・・列
　１００・・・自動車
　１０２・・・サイドメンバ（車体強度部材）
　１０４・・・バンパ補強部材 11A, 11B, 11C ... energy absorbing member 12 (1), 12 (2), 12 (3), 12 (4) ... side face 14 ... central axis (axis)
15, 15 (1), 15 (2), 15 (3), 15 (4), 15 (5), 15 (6), 15 (7), 15 (8), 15 (9) ... swelling Output part 19, 19 (1), 19 (2), 19 (3), 19 (4), 19 (n) ... row 100 ... automobile 102 ... side member (body strength member)
104 ... Bumper reinforcement member

Claims (10)

  1. 　座屈することによって前記筒状の軸方向に加わった衝突エネルギーを吸収するエネルギー吸収部材であって、
    　複数の膨出部が隣接又は近接した状態で形成された、筒状の板状部材を有し、
    　前記板状部材には、前記筒状の内方に向かって突出する前記膨出部と前記筒状の外方に向かって突出する前記膨出部とが混在して形成されていることを特徴とするエネルギー吸収部材。     An energy absorbing member that absorbs collision energy applied in the cylindrical axial direction by buckling,
    It has a cylindrical plate-like member formed in a state where a plurality of bulges are adjacent or close to each other,
    The plate-like member is formed by mixing the bulging portion protruding toward the inside of the cylindrical shape and the bulging portion protruding toward the outside of the cylindrical shape. An energy absorbing member.
  2. 　前記板状部材は複数の側面部からなる角筒状に形成され、
    　少なくとも一つの前記側面部には、前記角筒状の内方に向かって突出する前記膨出部と前記角筒状の外方に向かって突出する前記膨出部とが混在して形成されていることを特徴とする請求項１に記載のエネルギー吸収部材。     The plate-like member is formed in a rectangular tube shape having a plurality of side portions,
    At least one of the side surface portions is formed by mixing the bulging portion that protrudes inward of the rectangular tube shape and the bulging portion that protrudes outward of the rectangular tube shape. The energy absorbing member according to claim 1, wherein:
  3. 　前記側面部には、複数の前記膨出部が一直線状に配列されてなる列が複数形成され、
    　それぞれの前記列には、前記筒状の内方に向かって突出された前記膨出部のみ、又は、前記筒状の外方に向かって突出された前記膨出部のみが形成されていることを特徴とする請求項２に記載のエネルギー吸収部材。     In the side surface portion, a plurality of rows in which a plurality of the bulging portions are arranged in a straight line are formed,
    In each of the rows, only the bulging portion protruding toward the inner side of the cylindrical shape or only the bulging portion protruding toward the outer side of the cylindrical shape is formed. The energy absorbing member according to claim 2.
  4. 　前記列は、前記筒状の前記軸方向に対して略直交する方向に沿って形成されたことを特徴とする請求項３に記載のエネルギー吸収部材。 4. The energy absorbing member according to claim 3, wherein the row is formed along a direction substantially orthogonal to the cylindrical axial direction.
  5. 　それぞれの前記側面部に、前記列が、隣接する該側面部間で互いに連続するように形成され、且つ、
    　これらの列として、前記筒状の外方に向かって突出された前記膨出部のみが形成されている前記列と、前記筒状の内方に向かって突出された前記膨出部のみが形成されている前記列とが交互に形成されたことを特徴とする請求項３に記載のエネルギー吸収部材。     In each of the side portions, the row is formed to be continuous with each other between the adjacent side portions, and
    As these rows, only the bulging portion that protrudes outward in the cylindrical shape is formed, and only the bulging portion that protrudes inward of the cylindrical shape is formed. The energy absorbing member according to claim 3, wherein the arranged rows are alternately formed.
  6. 　それぞれの前記側面部に、前記列が、複数本ずつ形成され、且つ、
    　これらの列として、前記筒状の外方に向かって突出された前記膨出部のみが形成されている１本又は複数本の前記列と、前記筒状の内方に向かって突出された前記膨出部のみが形成されている１本又は複数本の前記列とが、交互に形成されたことを特徴とする請求項４又は５に記載のエネルギー吸収部材。     A plurality of the rows are formed on each of the side portions, and
    As these rows, one or a plurality of the rows in which only the bulging portions projecting outward in the tubular shape are formed, and the rows projecting inward in the tubular shape. The energy absorbing member according to claim 4 or 5, wherein one or a plurality of the rows in which only the bulging portions are formed are alternately formed.
  7. 　それぞれの前記膨出部は、外形が同一形状の正面視多角形に形成されたことを特徴とする請求項１に記載のエネルギー吸収部材。 2. The energy absorbing member according to claim 1, wherein each of the bulging portions is formed in a polygon in a front view having the same outer shape.
  8. 　それぞれの前記膨出部の前記外形は、正面視正六角形に形成されたことを特徴とする請求項６に記載のエネルギー吸収部材。 The energy absorbing member according to claim 6, wherein the outer shape of each of the bulging portions is formed in a regular hexagonal shape when viewed from the front.
  9. 　前記エネルギー吸収部材を構成する前記板状部材の略全面にわたって、前記膨出部が隙間なく隣接して形成されたことを特徴とする請求項１に記載のエネルギー吸収部材。 2. The energy absorbing member according to claim 1, wherein the bulging portion is formed adjacent to the plate-like member constituting the energy absorbing member without a gap over substantially the entire surface.
  10. 　自動車の車体強度部材と車幅方向に沿うバンパ補強部材との間に配設されることを特徴とする請求項１に記載のエネルギー吸収部材。 2. The energy absorbing member according to claim 1, wherein the energy absorbing member is disposed between a vehicle body strength member of a vehicle and a bumper reinforcing member along a vehicle width direction.
PCT/JP2014/053414 2013-02-18 2014-02-14 Energy absorption member WO2014126183A1 (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
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CN114880791A (en) * 2022-04-13 2022-08-09 汕头大学 Chiral multi-cell structural unit, assembly and intelligent construction method

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CN109591738A (en) * 2018-11-15 2019-04-09 华侨大学 A kind of automobile collision preventing structural assembly
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CN109910803A (en) * 2018-12-24 2019-06-21 北奔重型汽车集团有限公司 A kind of type bumper suitable for heavy truck vehicle
CN114880791A (en) * 2022-04-13 2022-08-09 汕头大学 Chiral multi-cell structural unit, assembly and intelligent construction method
CN114880791B (en) * 2022-04-13 2023-11-03 汕头大学 Chiral multicellular structure unit, assembly and intelligent construction method

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