JP6695825B2 - Vehicle shock absorber - Google Patents

Description

  BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle shock absorber provided in a portion of a vehicle that receives a collision load.

  2. Description of the Related Art As a vehicle impact absorbing device, a device has been developed in which a collision load receiving member such as a bumper installed at a front end portion of a vehicle protrudes forward just before a collision with a collision object (Patent Document 1). Specifically, an expandable and contractible expander is provided between the collision load receiving member and the vehicle structure, and an inflator is provided in the expander. Normally, the inflator is contracted and the collision load receiving member is located at the front end of the vehicle structure.However, the inflator operates immediately before the collision and the inflator expands due to the gas generated from the inflator. Then, the collision load receiving member separates from the vehicle structure and projects forward. At the time of a collision, gas gradually escapes from the expander that has been expanded by receiving the collision load, the expander contracts, and the collision energy is absorbed.

JP, 2010-241240, A

  In such a vehicle impact absorbing device, the expander is formed of a thin metal plate, and due to a sudden increase in internal pressure at the time of a collision, the expander deforms so as to expand in a direction other than the front-rear direction, which causes gas leakage. May occur. As a result, the energy absorption amount of the vehicle impact absorbing device may be insufficient.

  In view of such a problem, an object of the present invention is to expand the inflatable body immediately before the collision to cause the collision load receiving member to project in the collision direction, and in the vehicle impact absorbing device that absorbs the collision energy while contracting the inflatable body, The collision energy is absorbed by a member separate from the expander. This is to secure the amount of energy absorption at the time of collision.

  A first aspect of the present invention relates to a collision load receiving member, which is provided so as to receive a collision load by a vehicle body structural member of a collided portion of a vehicle body, and which receives a collision load from a collision object and transmits the collision load to the vehicle body structural member; An expander provided between the load receiving member and the vehicle body structural member to form one space, and a fluid is supplied to the space in the expander before collision to expand the volume of the space, Is a shock absorbing device for a vehicle, comprising: An energy absorber made of a resin, which is fixed in the inflatable body so as to be deformed with the expansion of the inflatable body, and which is cured by receiving energy supplied from the fluid supply means, is provided, and the energy absorber is the collision. When the load receiving member receives a collision load, the expandable body is deformed in a hardened state in response to contraction and absorbs collision energy.

  In the first aspect of the present invention, the collided portion may be any of the front, rear, side and roof of the vehicle body. The fluid supplied to the space inside the expander may be gas, oil, air, or the like.

  According to the first aspect of the invention, the resin-made energy absorber is cured in a deformed state according to the expansion of the expander. At the time of collision, the energy absorber in the hardened state is deformed according to the contraction of the expander and absorbs the collision energy. Therefore, the absorption of the collision energy is performed by the deformation of the energy absorber. Therefore, even if the expander leaks gas, the required collision energy can be absorbed.

  In a second aspect of the present invention based on the first aspect, the energy absorber includes a resin that is cured by receiving the pressure of the fluid supplied from the fluid supply means.

  According to the second aspect of the invention, the energy absorber made of resin can be cured by receiving the pressure of the fluid supplied from the fluid supply means and can be in a state capable of receiving the collision energy.

  In a third aspect of the present invention based on the first aspect, the energy absorber includes a resin that is cured by receiving heat generated when the fluid of the fluid supply means is generated.

  According to the third aspect of the present invention, the resin-made energy absorber can be cured by receiving the heat of the fluid supply means when the fluid is generated, and can be in a state capable of receiving the collision energy.

  4th invention of this invention is the said 1st-3rd invention, Comprising: The said energy absorber is inserted and fixed between the both ends of the expansion-contraction direction of the said expansion body, and was extended in the said expansion-contraction direction. It is a string-like body.

  According to the fourth invention, the energy absorber is a cord-shaped body. Therefore, when the expansion body expands, the energy for deforming the energy absorber can be reduced. Therefore, the influence of the energy absorber on the expansion operation of the expander can be reduced. Further, since the cord-like body is inside the expandable body, it can efficiently receive the fluid pressure of the fluid supply means.

  A fifth invention of the present invention is the fuel cell system according to any one of the first to third inventions, wherein the energy absorber is arranged inside the expander so as to enclose the fluid supply means, and the fluid pressure of the fluid supply means is increased. It is a bag that is inflated and deformed by receiving it.

  According to the fifth aspect of the invention, the energy absorber is a bag that expands and deforms inside the expander. Therefore, the contracting inflatable body can be stably received on the surface of the bag body, and the controllability of the energy absorption amount by the energy absorbing body can be improved. Further, since the energy absorber surrounds the fluid supply means, it can efficiently receive the heat generated by the fluid supply means.

  In a sixth aspect of the present invention based on the fifth aspect, an adhesive for adhering the bag body to the inner wall of the inflatable body is attached to the energy absorber on the outer side of the bag body.

  According to the sixth aspect of the invention, the energy absorber is bonded to the inner wall of the inflatable body and is integrated with the inflatable body when the bag is inflated and deformed. Therefore, the expander can be reinforced by the energy absorber.

1 is a plan view showing a bumper structure of a vehicle front part to which a first embodiment of a vehicle shock absorbing device of the present invention is applied. It is a partial perspective expansion perspective view of 1st Embodiment. It is an III-III line sectional arrow enlarged view of FIG. FIG. 4 is a sectional view similar to FIG. 3, showing a state where gas is supplied from the inflator and the bumper moves forward. FIG. 4 is a cross-sectional view similar to FIG. 3, showing a state where the bumper is being moved rearward under a collision load. It is an enlarged view of the VI section of FIG. FIG. 4 is a sectional view showing a second embodiment of the vehicle impact absorbing device of the present invention and corresponding to FIG. 3. FIG. 8 is a cross-sectional view similar to FIG. 7, showing a state where gas is supplied from the inflator and the bumper is moving forward. FIG. 8 is a cross-sectional view similar to FIG. 7, showing a state in which gas has been supplied from the inflator and the forward movement of the bumper has been completed. FIG. 8 is a cross-sectional view similar to FIG. 7, showing a state where the bumper is being moved rearward under a collision load. It is an enlarged view of the XI section of FIG. It is sectional drawing corresponding to FIG. 3 which shows 3rd Embodiment of the vehicle impact absorption apparatus of this invention. FIG. 13 is a cross-sectional view similar to FIG. 12, showing a state where gas is supplied from the inflator and the bumper moves forward. FIG. 13 is a cross-sectional view similar to FIG. 12, showing a state where the bumper is being moved rearward under a collision load.

<First embodiment>
1 to 3 show the configuration of the first embodiment of the present invention. The first embodiment is an example in which the shock absorbing device of the present invention is applied to a front bumper portion for an automobile. In each drawing, arrows indicate the respective directions of the device when mounted on a vehicle. In the following description, the description about the direction is based on this direction.

  As shown in FIG. 1, the bumper reinforcement 1 of the front bumper, which is a collision load receiving member, is fixed to the front ends of front members 2L and 2R arranged on the left and right sides of the vehicle body as a vehicle body structural member of a collision portion. Therefore, the collision load applied to the front bumper at the time of vehicle front collision is received by the front members 2L, 2R via the bumper reinforcement 1.

  As shown in FIGS. 2 and 3, the front end portion of the front member 2L is provided with the shock absorbing unit 10 which is a characteristic part of the present invention. Although only the front member 2L is shown here and the front member 2R is omitted, the front members 2L and 2R are provided with the shock absorbing unit 10 having the same structure.

  The shock absorbing unit 10 includes a cover body 13 that is a bottomed cylindrical body, a bellows-shaped expander 11 that is fixed inside the cover body 13, and an energy that is a cord-like body 15 a that is fixed inside the expander 11. The absorber 15 and the inflator 12 which is a fluid supply means fixed inside the expander 11 are provided.

  The cover body 13 integrally includes a container-shaped container portion 13a and a flange portion 13b formed over the entire circumference on the opening side of the container portion 13a. The cover body 13 is made of a steel plate. The container portion 13a is inserted inside the front end of the front member 2L having a closed cross-sectional structure, and the flange portion 13b is fixed to the front end of the front member 2L via a top member 21 which is a ring-shaped disc.

  The inflatable body 11 integrally includes a container-shaped bellows portion 11a and a flange portion 13b formed over the entire circumference of the bellows portion 11a on the opening side. The bellows portion 11 a is formed in a bellows shape so as to be expandable and contractable in the front-rear direction, and is made of a steel plate having a thinner plate thickness than the cover body 13. The bellows portion 11a is arranged so as to be a container overlapping with the container portion 13a, and the flange portion 11b is arranged so as to overlap with the front side of the flange portion 13b of the cover body 13.

  The energy absorber 15 is composed of a plurality of cord-shaped bodies 15a, each cord-shaped body 15a is formed extending in the front-rear direction, and is located near the bottom of the bellows portion 11a of the expander 11 and the flange portion 11b of the bellows portion 11a. It is fixed between and. As shown in FIG. 3, two cord-like bodies 15a are combined so as to form an X-shape. Two of these cord-like bodies 15a form a pair and the two or four cord-like bodies 15a form an inner circumference of the bellows portion 11a. Are evenly spaced along. Further, each cord-shaped body 15a is set to a length that limits the further expansion of the inflatable body 11 when the inflatable body 11 is inflated in the front-rear direction as shown in FIG.

  The string-like body 15a is made of a resin that cures when the gas pressure from the inflator 12 increases. FIG. 6 schematically shows the internal structure of the cord 15a. A plurality of capsules 15b are mixed in a resin base material 15c, and a hardening agent is sealed in the capsule 15b. The capsule 15b is configured to burst when a predetermined pressure is applied from the outside, and when the capsule 15b bursts, the curing agent inside mixes into the resin base material 15c, and the resin base material 15c is cured. It Known resins can be used as the resin having such pressure-sensitive curing performance. For example, it can be made of a two-liquid mixed type epoxy resin.

  The inflator 12 is a known inflator similar to the inflator used in the airbag device for occupant protection, and is configured to generate gas (corresponding to the fluid of the present invention) by being ignited by being energized. The inflator 12 is arranged at the bottom of the bellows portion 11a of the inflatable body 11, and is fixed to the bottom portion of the container portion 13a of the cover body 13 with the bottom portion of the bellows portion 11a of the inflatable body 11 interposed therebetween. The inflator 12 is electrically connected so as to be connected to a power source (not shown) to operate when a known collision predicting means (not shown) predicts a vehicle front collision. Therefore, the inflator 12 generates gas when activated, and supplies the gas into the inflatable body 11.

  The opening side of the expandable body 11 is covered with a lid body 14. The rear side of the lid body 14 is overlapped and fixed to the front side of the flange portion 11b of the inflatable body 11. Therefore, the opening of the inflatable body 11 is closed by the lid 14 to form one space. The bumper reinforcement 1 is fixed to the front side of the lid 14.

<State before collision prediction>
FIG. 3 shows a state where the inflator 12 does not generate gas. At this time, the expansion body 11 is in a contracted state. Therefore, the flange portion 11b of the inflatable body 11 and the lid body 14 are in contact with the flange portion 13b of the cover body 13, and the bumper including the bumper reinforcement 1 is located at the front end of the front member 2L. Further, since the cord 15a of the energy absorber 15 is not subjected to the gas pressure of the inflator 12, the capsule 15b in the resin tissue of the cord 15a is not ruptured and the cord 15a is hardened. It is not deformable. Therefore, the cord-shaped body 15a is bent by the amount that the distance between the fixed ends to the inflatable body 11 is shortened due to the contraction of the inflatable body 11.

<State after collision prediction>
FIG. 4 shows a state in which the inflator 12 generates gas and the inflator 11 is expanded by receiving the gas pressure. At this time, the inflator 12 is operated in response to the prediction of the vehicle front collision by the collision prediction means, and supplies gas into the inflatable body 11. Therefore, the expander 11 is expanded forward. As shown in FIG. 4, the inflatable body 11 is stopped from inflating when the cord-shaped body 15a is fully extended and cannot be extended any more.

  When the inflatable body 11 is inflated, the lid body 14 moves forward together with the flange portion 11b of the inflatable body 11 and moves the bumper reinforcement 1 forward. At this time, the cord-like body 15a receives the gas pressure in the expandable body 11, and the capsule 15b in the resin tissue is ruptured. Therefore, the curing agent enclosed in the capsule 15b is mixed in the resin base material 15c, and the string-shaped body 15a is cured in the stretched state as shown in FIG. In this way, the bumper reinforcement 1, that is, the bumper, moves forward to be ready for a collision.

<State at the time of collision>
FIG. 5 shows a state in which the vehicle collides frontally, a collision load from a collision object is applied to the bumper, and the bumper reinforcement 1 is pushed backward as indicated by an arrow. At this time, the hardened string-like body 15a receives a load from the bumper reinforcement 1 through the lid body 14, and is gradually deformed from the front end side. That is, the resin forming the string-like body 15a is hardened, but when the load received from the bumper reinforcement 1 is increased, it is gradually broken and deformed from the weak portion. In this case, since the string-like body 15a is formed thinner toward the front side in advance, the strength is weakened toward the front side. The resin used may be a fiber reinforced resin in order to adjust the breaking strength of the string 15a.

  As the string-like body 15a is gradually deformed in this manner, the bellows portion 11a of the expandable body 11 is contracted in the front-rear direction. At this time, the gas from the inflator 12 filled in the inflatable body 11 is discharged from the opening (not shown). In this way, the string-like body 15a is deformed and the inflatable body 11 is contracted, whereby the collision energy applied to the bumper reinforcement 1 can be attenuated. That is, the collision energy can be absorbed by the string-shaped body 15a and the expansion body 11.

<Effects of First Embodiment>
According to the first embodiment, the collision energy at the time of a vehicle front collision is absorbed and attenuated by the deformation of the string-shaped body 15a. Since the collision load is thus received by the string-shaped body 15a, the inflatable body 11 is suppressed from expanding in a direction other than the front-rear direction. Therefore, the expansion body 11 is also prevented from leaking gas, and the expansion body 11 can also exhibit the function of absorbing collision energy. Even if the expandable body 11 leaks gas, the required collision energy can be absorbed by the string-shaped body 15a.

  Further, when the inflatable body 11 is inflated as shown in FIG. 4, the string-shaped body 15a has a function of limiting the inflating of the inflatable body 11. Therefore, the amount of forward movement of the bumper reinforcement 1 at the time of predicting a collision can be kept constant.

  Further, when the inflator 11 is inflated by receiving the gas pressure of the inflator 12, the energy absorber 15 fixed to the inflator 11 is a string-like body 15a. Therefore, the energy for deforming the energy absorber 15 when the expander 11 expands can be reduced. Therefore, the influence of the energy absorber 15 on the expanding operation of the expander 11 can be reduced.

  Further, since the cord-like body 15a is inside the inflatable body 11, it can efficiently receive the gas pressure of the inflator 12.

<Second Embodiment>
FIG. 7 shows the configuration of the second embodiment of the present invention. The feature of the second embodiment with respect to the first embodiment is that, in the first embodiment, the energy absorber 15 is composed of the string-shaped body 15a, whereas in the second embodiment, the energy absorber 16 is used. Is the point that it is configured by a bag. The other points are the same as each other, and the repeated description of the same portions will be omitted.

  The energy absorber 16, which is a bag, is fixed to the bottom of the bellows portion 11a of the inflatable body 11 so as to accommodate the inflator 12 inside the bag. As shown in FIG. 11, the energy absorber 16 is made of a thermosetting resin 16c and is cured by receiving heat generated when the inflator 12 is energized to generate gas. For example, a thermosetting epoxy resin can be used as the thermosetting resin 16c. An adhesive 16d made of a thermosetting resin is attached to the outer surface of the energy absorber 16.

<State before collision prediction>
FIG. 7 shows a state in which the inflator 12 does not generate gas. At this time, the expansion body 11 is in a contracted state. Therefore, the flange portion 11b of the inflatable body 11 and the lid body 14 are in contact with the flange portion 13b of the cover body 13, and the bumper including the bumper reinforcement 1 is located at the front end of the front member 2L. Further, since the energy absorber 16 is not subjected to the gas pressure and heat of the inflator 12, the energy absorber 16 is not cured and is contracted in a deformable state.

<State after collision prediction>
FIG. 8 shows a state in which the inflator 12 generates gas, and the energy absorber 16 is expanding due to the gas pressure. The expanding energy absorber 16 pushes the lid 14 forward by the bottom 16a, and the side 16b is pressed against the inner wall of the bellows 11a of the expander 11. At that time, the resin forming the energy absorber 16 is not yet cured.

  FIG. 9 shows a state in which the energy absorber 16 and the bellows portion 11a of the expander 11 are fully extended forward. In this state, the forward movement of the bumper including the bumper reinforcement 1 is stopped to prepare for a collision. In this state, the energy absorber 16 is hardened by the heat of the inflator 12. At this time, the adhesive 16d is also cured while being adhered to the inner wall of the bellows portion 11a.

<State at the time of collision>
FIG. 10 shows a state in which the vehicle collides with the front, a collision load from a collision object is applied to the bumper, and the bumper reinforcement 1 is pushed backward as shown by an arrow. At this time, the hardened energy absorber 16 receives the load from the bumper reinforcement 1 via the lid 14, and is deformed along the bellows shape of the bellows portion 11 a of the expander 11. That is, although the resin forming the energy absorber 16 is hardened, when the load received from the bumper reinforcement 1 increases, the bellows shape of the bellows portion 11a that is bonded to and integrated with the energy absorber 16 has an influence. The energy absorber 16 is destroyed and deformed in the same manner as the shape is contracted.

<Effects of Second Embodiment>
According to the second embodiment, the collision energy at the time of vehicle front collision is absorbed and attenuated by the deformation of the energy absorber 16 integrated with the expander 11. At this time, since the energy absorber 16 is bonded to the inner wall of the inflatable body 11, even if the bellows portion 11a of the inflatable body 11 is damaged, the inflatable body 11 is prevented from causing gas leakage, and is expanded. The body 11 can also exhibit the function of absorbing collision energy.

  When the expander 11 expands as shown in FIG. 9, the energy absorber 16 has a function of limiting expansion of the expander 11. Therefore, the amount of forward movement of the bumper reinforcement 1 at the time of predicting a collision can be kept constant. In order to strengthen the expansion limiting function of the expander 11 by the energy absorber 16, UD (unidirectional carbon fiber reinforced thermoplastic resin) tape can be set in the front-rear direction and the circumferential direction of the energy absorber 16.

  Further, when the energy absorbing body 16 receives a collision load as shown in FIG. 10, the energy absorbing body 16 receives the lid body 14 by its bottom portion 16a. Moreover, the deformation at the time of energy absorption is performed by the side portion 16b of the energy absorber 16. Therefore, the controllability of the energy absorption amount by the energy absorber 16 can be improved.

  Further, since the energy absorber 16 wraps the inflator 12, it can efficiently receive the heat generated by the inflator 12.

<Third Embodiment>
FIG. 12 shows the configuration of the third embodiment of the present invention. The feature of the third embodiment with respect to the first embodiment is that, in the first embodiment, each string-like body 15a of the energy absorber 15 is combined in an X shape, whereas in the third embodiment, The point is that the cord-shaped bodies 17a of the energy absorber 17 are arranged in parallel with each other. The other points are the same as each other, and the repeated description of the same portions will be omitted.

  The energy absorber 17 is composed of a plurality of cord-shaped bodies 17a, each cord-shaped body 17a is formed to extend in the front-rear direction, and is located near the bottom of the bellows portion 11a of the inflatable body 11 and the flange portion 11b of the bellows portion 11a. It is fixed between and. As shown in FIG. 12, the cord-shaped bodies 15a are arranged in parallel with each other, and 3 to 4 cord-shaped bodies 17a are arranged as the energy absorbers 17 at equal intervals on the inner circumference of the bellows portion 11a. In addition, each cord-shaped body 17a is set to a length that limits the further expansion of the inflatable body 11 when the inflatable body 11 expands in the front-rear direction as shown in FIG.

  The cord-like body 17a is made of a resin that hardens when the gas pressure from the inflator 12 increases, similar to the cord-like body 15a in the first embodiment.

<State before collision prediction>
FIG. 12 shows a state in which the inflator 12 does not generate gas. At this time, the expansion body 11 is in a contracted state. Therefore, the flange portion 11b of the inflatable body 11 and the lid body 14 are in contact with the flange portion 13b of the cover body 13, and the bumper including the bumper reinforcement 1 is located at the front end of the front member 2L. Further, the string-like body 17a of the energy absorber 17 is not cured and is in a deformable state because it is not subjected to the gas pressure of the inflator 12. Therefore, the string-like body 17a is bent by the amount that the distance between the fixed ends of the inflatable body 11 is shortened due to the contraction of the inflatable body 11.

<State after collision prediction>
FIG. 13 shows a state in which the inflator 12 generates gas and receives the gas pressure to expand the inflatable body 11. At this time, the inflator 12 is operated in response to the prediction of the vehicle front collision by the collision prediction means, and supplies gas into the inflatable body 11. Therefore, the expander 11 is expanded forward. As shown in FIG. 13, the inflatable body 11 is stopped from inflating when the string-shaped body 17a is fully extended and cannot be extended any more.

  When the inflatable body 11 is inflated, the lid body 14 moves forward together with the flange portion 11b of the inflatable body 11 and moves the bumper reinforcement 1 forward. At this time, the cord-like body 17a receives the gas pressure in the expansion body 11 and is hardened in the extended state as shown in FIG. In this way, the bumper reinforcement 1, that is, the bumper, moves forward to be in a state of preparing for a collision.

<State at the time of collision>
FIG. 14 shows a state in which the vehicle collides frontally, a collision load from a collision object is applied to the bumper, and the bumper reinforcement 1 is pushed backward as indicated by an arrow. At this time, the hardened string-like body 17a receives the load from the bumper reinforcement 1 through the lid body 14, and is gradually deformed from the front end side. That is, the resin forming the string-like body 17a is hardened, but when the load received from the bumper reinforcement 1 is increased, it is gradually broken and deformed from the weak portion. In this case, since the string-like body 17a is formed thinner toward the front side in advance, the strength is weakened toward the front side.

  As the string-like body 17a is gradually deformed in this manner, the bellows portion 11a of the inflatable body 11 is contracted in the front-rear direction. In this way, the string-like body 17a is deformed and the inflatable body 11 is contracted, so that the collision energy applied to the bumper reinforcement 1 can be attenuated. That is, the collision energy can be absorbed by the string-shaped body 17a and the inflatable body 11.

<Effects of Third Embodiment>
According to the third embodiment, the collision energy at the time of the vehicle front collision is absorbed and attenuated by the deformation of the string-shaped body 17a. In this way, since the collision load is received by the string-like body 17a, the same effect as that of the first embodiment can be achieved.

  The specific embodiments have been described above, but the present invention is not limited to their appearance and configuration, and various changes, additions, and deletions are possible. For example, in the first and third embodiments, the cord-shaped bodies 15a and 17a of the energy absorbers 15 and 17 are made of pressure-sensitive curable resin, but they may be made of thermosetting resin. In addition, in the second embodiment, the energy absorber 16 is made of a thermosetting resin, but it may be made of a pressure sensitive resin.

  Further, although the present invention is applied to the automobile in the above-described embodiment, it can be applied to various vehicles other than the automobile.

1 Bumper reinforcement (collision load receiving member)
2L, 2R front member (body structure member of the collision part)
21 Top Member 10 Shock Absorbing Unit 11 Expander 11a Bellows 11b Flange 12 Inflator (Fluid Supply Means)
13 Cover 13a Container 13b Flange 14 Lid 15 Energy Absorber 15a String 15b Capsule 15c Resin Base Material 16 Energy Absorber 16a Bottom 16b Side 16c Thermosetting Resin 16d Adhesive 17 Energy Absorber 17a String body

Claims (6)

A collision load receiving member that is provided so as to receive a collision load by a vehicle body structural member of a collided portion of the vehicle body and that receives a collision load from a collision object and transmits the collision load to the vehicle body structural member,
An expander provided between the collision load receiving member and the vehicle body structural member to form one space;
A vehicle shock absorber comprising: a fluid supply unit that expands the volume of the space by supplying a fluid to the space inside the expander before a collision;
An energy absorber made of a resin, which is fixed in the inflatable body so as to be deformed with the expansion of the inflatable body, and which is cured by receiving energy supplied from the fluid supply means,
When the collision load receiving member receives a collision load, the energy absorber is deformed in a hardened state as the expansion body is contracted to absorb the collision energy. In claim 1,
The impact absorbing device for a vehicle, wherein the energy absorber includes a resin that is cured by receiving a pressure of a fluid supplied from the fluid supply means. In claim 1,
The vehicle impact absorbing device, wherein the energy absorber includes a resin that is cured by receiving heat generated when the fluid of the fluid supply unit is generated. In any one of Claims 1-3,
The vehicle energy absorbing device is a string-shaped body that is fixed by being inserted between both ends of the expander in the expansion / contraction direction and is fixed in the expansion / contraction direction. In any one of Claims 1-3,
The vehicle impact absorbing device is a bag body that is disposed inside the inflatable body so as to enclose the fluid supply means, and is a bag body that is inflated and deformed by receiving fluid pressure of the fluid supply means. In claim 5,
The energy absorber is a vehicle shock absorber in which an adhesive for adhering the bag body to the inner wall of the inflatable body is attached to the outside of the bag body.

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