JP6401065B2 - Shock absorbing structure - Google Patents

Description

  The present invention relates to an impact-absorbing structure that is installed on a passenger compartment side of a vehicle body on a vehicle compartment side of a vehicle body panel.

  In automobiles such as passenger cars, a floor carpet is laid as an interior material on a floor panel, thereby improving the design and improving the soundproof performance. It has been proposed to install protective materials made of various shock-absorbing materials that protect the feet of passengers such as front seat passengers between the floor carpet and the floor panel. The shock absorbing material for protecting the occupant's shin is also called a tibia pad.

  The shock absorbing structure disclosed in Patent Document 1 includes a shock absorber formed using a foam material, and a support member that supports the shock absorber in a slidable manner. The shock absorber forms a footrest portion together with the floor carpet. In a normal state, the shock absorber and the support member are fixed to each other by sticking an adhesive tape across the front surface of the extension portion of the shock absorber and the front surface of the support member. When an impact is input from the front, the extension of the shock absorber is separated from the adhesive tape or the adhesive tape is broken, and the shock absorber slides backward.

JP 2008-87511 A

  Although it is necessary for the footrest portion to slide backward when an impact is applied from the front to reduce the lower limb injury value, it is preferable to improve the rigidity when the foot is placed on the footrest portion during normal times.

  An object of the present invention is to provide an impact absorbing structure capable of improving a feeling of rigidity when a foot is placed on a footrest portion at a normal time.

The present invention is an impact-absorbing structure that is installed on the passenger compartment side of a vehicle body on the passenger compartment side of a vehicle body panel,
Floor pads,
A footrest pad disposed on the floor pad;
A first fitting member provided on the floor pad;
A second fitting member provided on the footrest pad, fitted to the first fitting member, and separable from the first fitting member when an impact force is applied to the footrest pad from the front; Prepared ,
Of the first fitting member and the second fitting member, one fitting member has a front-rear extending portion that extends in the front-rear direction of the automobile, and the other fitting member crosses the front-rear direction. Crossed extension part,
The cross extension portion is inserted and locked in the front-rear direction so that the front-rear extension portion can be pulled out in the front-rear direction when an impact force is applied to the footrest pad from the front. Having a stop,
The front end portion of the cross extension portion has a mode in which a gap is formed so that the front and rear extension portion can be detached from the locking portion toward the front end side when the impact force is applied. .
In addition, the present invention is an impact absorbing structure that is installed on the passenger compartment side of a vehicle body on the passenger compartment side of a vehicle body panel,
Floor pads,
A footrest pad disposed on the floor pad;
A first fitting member provided on the floor pad;
A second fitting member provided on the footrest pad, fitted to the first fitting member, and separable from the first fitting member when an impact force is applied to the footrest pad from the front; Prepared,
Of the first fitting member and the second fitting member, one fitting member has a front-rear extending portion that extends in the front-rear direction of the automobile, and the other fitting member crosses the front-rear direction. Crossed extension part,
The cross extension portion is inserted and locked in the front-rear direction so that the front-rear extension portion can be pulled out in the front-rear direction when an impact force is applied to the footrest pad from the front. Having a stop,
The front-rear extension portion has a bending portion that is locked to the locking portion after getting over the locking portion when inserted into the locking portion of the cross extension portion,
Inclined so that the surface of the bent portion that gets over the locking portion and locked to the locking portion becomes the front end side of the front-rear extension portion as it becomes the outer side in the vehicle width direction of the automobile. It has an aspect.

  ADVANTAGE OF THE INVENTION According to this invention, the impact-absorbing structure which can improve a feeling of rigidity when a leg | foot is mounted on a footrest part at normal time can be provided.

The principal part sectional drawing which shows the example of the motor vehicle which employ | adopted the shock absorption structure typically. The disassembled perspective view which shows the example of an impact-absorbing structure. The vertical sectional view showing the example of an impact-absorbing structure. The principal part sectional drawing which shows the example of an impact-absorbing structure. The perspective view which shows the example of a 1st fitting member. The figure which shows the example of a 1st fitting member. The perspective view which shows the example of a 2nd fitting member. The figure which shows the example of a 2nd fitting member. The vertical sectional view which shows typically the example which fits a 1st fitting member and a 2nd fitting member. The figure which shows the example of the 1st fitting member and the 2nd fitting member which were mutually fitted. The perspective view which shows the example of an attachment member and its periphery. The perspective view which shows the example of an attachment member. The figure which shows the example of an attachment member. The figure which shows the example of an attachment member.

  Embodiments of the present invention will be described below. Of course, the following embodiments are merely examples of the present invention, and all the features shown in the embodiments are not necessarily essential to the means for solving the invention.

(1) Overview of this technology:
First, an overview of the present technology will be described with reference to FIGS. 1 to 14 are diagrams schematically showing examples. The enlargement ratios in the respective directions shown in these drawings may be different, and the respective drawings may not be matched.

[Aspect 1]
The shock absorbing structure 1 installed on the passenger compartment M of the automobile 100 on the side of the passenger compartment C1 of the vehicle body panel 80 includes a floor pad 10, a footrest pad 20, a first fitting member 30, and a second fitting member 40. Is provided. The footrest pad 20 is disposed on the floor pad 10. The first fitting member 30 is provided on the floor pad 10. The second fitting member 40 is provided on the footrest pad 20, is fitted with the first fitting member 30, and can be separated from the first fitting member 30 when an impact force F <b> 1 is applied to the footrest pad 20 from the front. It is.

In the above aspect, the first fitting member 30 provided on the floor pad 10 and the second fitting member 40 provided on the footrest pad 20 are detachably fitted when an impact is input from the front. In addition, it is possible to provide an impact-absorbing structure that can improve the rigidity when the foot is placed on the footrest portion 92 at normal times.
Here, a place under a rug such as a floor carpet is included in the feet of a passenger of an automobile.

[Aspect 2]
By the way, as illustrated in FIGS. 5, 6, and 10, one of the first fitting member 30 and the second fitting member 40 is one fitting member (for example, the second fitting member 40). Even if it has the front-back extension part 44 extended to the front-back direction D1 of 100, and the other fitting member (for example, the 1st fitting member 30) has the cross extension part 33 crossing the said front-back direction D1. Good. The cross extension 33 is inserted in the front-rear direction D1 so that the front-rear extension 44 can be pulled out in the front-rear direction D1 when an impact force F1 is applied to the footrest pad 20 from the front. You may have the latching | locking part 34 latched. A gap 34a is formed at the distal end portion 33a of the cross extending portion 33 so that the front / rear extending portion 44 can be detached from the locking portion 34 to the distal end side S5 when the impact force F1 is applied. May be. In this aspect, the front / rear extension part 44 drops from the locking part 34 to the front end S5 even if the front rest of the footrest pad 20 rotates away from the floor pad 10 due to the impact force F1 from the front. Thereby, the 1st fitting member 30 and the 2nd fitting member 40 are separable. Therefore, this aspect can more appropriately reduce the lower limb injury value.
Here, the extending direction of the cross extension part may be orthogonal to the front-rear direction such as the up-down direction, or may be a direction shifted from the direction orthogonal to the front-rear direction.

[Aspect 3]
The cross extension portion 33 extends from the extension portion main body 35 to the distal end portion 33a at a position sandwiching the front and rear extension portion 44 and the extension portion main body 35 extending until it abuts against the front and rear extension portion 44. You may have the 1st branch extension part 36 and the 2nd branch extension part 37 which took out. In at least one branch extension portion of the first branch extension portion 36 and the second branch extension portion 37, surfaces (36b, 37b) facing the other branch extension portion, and the locking portion 34 An inclined surface 36d that is separated from the other branch extending portion as it becomes the distal end side S3 of the front-rear extension portion 44 at the corner of the inserted front-rear extension portion 44 and the surfaces 36c, 37c on the front end side S3. , 37d may be formed. In this embodiment, when the impact force F1 is applied to the footrest pad 20 from the front, the front / rear extension part 44 is easily removed from the locking part 34 of the cross extension part 33, so that the lower limb injury value is appropriately reduced. It becomes possible. This effect can be obtained even when there is no inclined surface 37d and there is an inclined surface 36d, and even when there is no inclined surface 36d and there is an inclined surface 37d.

[Aspect 4]
As illustrated in FIGS. 7, 8, 10, etc., the front / rear extension portion 44 is moved to the locking portion 34 after getting over the locking portion 34 when inserted into the locking portion 34 of the cross extension portion 33. You may have the bending part 46 latched by the part 34. FIG. A surface (for example, a locked surface 46 b) that gets over the locking portion 34 in the bent portion 46 and is locked to the locking portion 34 extends in the front-rear direction as the side S <b> 7 descends from the locking portion 34. You may incline so that it may become the front end side S3 of the part 44. FIG. In this embodiment, when the impact force F1 is applied to the footrest pad 20 from the front, the front / rear extension part 44 is easily removed from the locking part 34 of the cross extension part 33, so that the lower limb injury value is appropriately reduced. It becomes possible.

[Aspect 5]
The floor pad 10 and the footrest pad 20 may be formed using a foam material. The first fitting member 30 and the second fitting member 40 may be formed using resin and have a higher density than the floor pad 10 and the footrest pad 20. This aspect can provide an impact-absorbing structure that has a low leg injury value and a favorable rigidity when the foot is placed on the footrest portion 92 at normal times.
Here, forming with a foam material includes both cases of forming with only a foam material and using a material different from the foam material together with the foam material. . The same applies to the following.
Forming with resin includes both cases of forming with resin alone and using a material different from resin together with resin. The same applies to the following.

[Aspect 6]
By the way, since there are various pedals at the driver's feet, it is preferable to suppress the displacement of the floor pad during normal times. From this viewpoint, the shock absorbing structure 1 of the present technology has another aspect. As illustrated in FIGS. 11 to 14 and the like, the shock absorbing structure 1 of this aspect includes a shock absorber (for example, the floor pad 10) and a base member 60, and is installed on the vehicle body C1 side of the vehicle body panel 80. . The shock absorber (10) has a convex portion 15 and is formed using a foam material. The base member 60 has a concave portion 61 into which the convex portion 15 is inserted, and a clip attachment portion 68 for attaching a clip 70 attached to the attachment object 75, and is fixed to the shock absorber (10).

  That is, when the clip 70 attached to the clip attachment portion 68 inserted into the recess 61 and fixed to the shock absorber (10) is attached to the attachment object 75, the vehicle body panel 80 is moved toward the compartment C1. The shock absorbing structure 1 is installed. Therefore, this aspect can provide a novel impact-absorbing structure that suitably fixes an impact-absorbing body formed using a foam material. Further, when the clip 70 is damaged, the shock absorbing structure 1 can be installed on the vehicle body C1 side of the vehicle body panel 80 by attaching a new clip 70 to the clip attachment portion 68.

[Aspect 7]
By the way, the base member 60 may have a side surface portion 63 that surrounds the convex portion 15 and forms the inner side surface 61 b of the concave portion 61. The side surface part 63 may have an opening / closing part 65 in which a notch part 63a connected to the opening 61a of the concave part 61 is formed when opened to the outer side S11. The opening / closing portion 65 may have a hooking portion 65a that is hooked on the convex portion 15 in a closed state. When the convex portion 15 is inserted into the concave portion 61 from the notch portion 63a with the opening / closing portion 65 open, and the opening / closing portion 65 is closed, the hooking portion 65a is hooked on the convex portion 15 so that the base member 60 is moved. You may fix to the said shock absorber (10). This aspect can facilitate fixing the base member to the shock absorber.

[Aspect 8]
The side surface portion 63 of the base member 60 may have a protrusion 64b that protrudes toward the inner side S12 and sticks into the convex portion 15. This aspect can improve the fixing strength of the base member with respect to the shock absorber.

[Aspect 9]
The shock absorbing structure 1 according to another aspect includes the shock absorbing body (10) and the mounting member 50, and is installed on the vehicle body C1 side of the vehicle body panel 80. The shock absorber (10) has a convex portion 15 and is formed using a foam material. The attachment member 50 has a concave portion 61 into which the convex portion 15 is inserted, and a clip body 71 attached to the attachment object 75, and is fixed to the shock absorber (10).

  That is, when the mounting member 50 in which the convex portion 15 is inserted into the concave portion 61 and is fixed to the shock absorber (10) is mounted on the mounting target 75, the shock absorbing structure 1 is installed on the vehicle body C1 side of the vehicle body panel 80. Is done. Therefore, this aspect can provide a novel impact-absorbing structure that suitably fixes an impact-absorbing body formed using a foam material.

(2) Specific examples of shock absorbing structure:
FIG. 1 illustrates a main part of a passenger car 100 employing the shock absorbing structure 1 of the present technology in a vertical section. FIG. 1 shows a foot portion of a front seat occupant M on a floor of a passenger automobile 100 having front and rear seats. At the foot of the occupant M of the automobile 100 shown in FIG. 1, the metal floor panel 81 has an uneven surface as a whole, but is disposed substantially horizontally, and the metal toe board 82 rises diagonally from the front edge 81a of the floor panel, A metal dash panel 83 rises obliquely closer to the vertical from the front edge 82a of the toe board. The dash panel 83 functions as a partition wall between the vehicle compartment C1 and the engine room, and the toe board 82 functions as an inclined portion that connects the dash panel 83 and the floor panel 81. A floor carpet (rug) 90 is laid on the panels 81, 82, 83, that is, on the vehicle compartment C 1 side of the vehicle body panel 80.

  The floor carpet 90 is provided substantially horizontally from the feet of the occupant M toward the rear, and is provided so as to rise obliquely from the feet of the occupant M toward the front in accordance with the shapes of the vehicle body panel 80 and the shock absorbing structure 1. It has been. The shock absorbing structure 1 is installed between the vehicle body panel 80 and the floor carpet 90 (on the vehicle compartment side of the vehicle body panel) at the feet of the occupant M, and on the floor panel 81, the toe board 82, and the dash panel 83. It is arranged across. The shock absorbing structure 1 includes a floor pad 10 having a substantially horizontal upper surface although there are projections and depressions, and a footrest pad 20 disposed on the floor pad 10. These pads 10 and 20 are shock absorbers that absorb shocks.

  The floor carpet 90 is disposed so as to cover the entire floor of the passenger compartment mainly for the purpose of design, sound absorption, sound insulation and the like. Here, in the floor carpet 90, a portion laid substantially horizontally on the floor pad 10 is referred to as a general portion 91, and a portion laid diagonally on the footrest pad 20 is referred to as a footrest portion 92. . In addition, as the skin material of the floor carpet, a tuft carpet in which napped piles are organized on a base fabric, a needle punch carpet in which fibers are entangled by needling a nonwoven web, or the like is used. The back surface of the floor carpet is lined with a thermoplastic resin or the like, and a low melting point thermoplastic resin such as low density polyethylene or ethylene vinyl acetate is lined as a binder. The floor carpet is shaped into a shape along the vehicle body panel and the shock absorbing structure by press-molding into a required shape in a state where the binder is heated and plasticized. On the floor carpet 90, another rug such as a small floor mat may be placed.

At the time of a frontal collision of the automobile, a strong impact is applied to the vehicle body panel 80 backward. When an impact force F1 is applied to the footrest pad 20 from the front, the footrest pad 20 is crushed to some extent to absorb the impact, and as shown by a two-dot chain line in FIG. 1, the rearward side is parallel to the floor surface FL1 of the passenger compartment C1. By sliding, the change in the angle between the foot M1 and the shin M2 is suppressed. In the rear side parallel to the floor surface FL1, not only the rear side that is strictly parallel to the floor surface but also a direction in which the floor surface is slightly separated or approached (for example, a deviation from the floor surface is 30 ° or less, preferably 15 ° or less) In addition, a direction deviating from the strict rearward direction, such as a direction slightly deviating from the anteroposterior direction to the left or right (for example, a deviation from the anteroposterior direction of 30 ° or less, preferably 15 ° or less) is included. Further, the floor surface FL1 includes not only a strict horizontal plane but also a direction slightly deviated from the horizontal plane (for example, a deviation from the horizontal plane is 30 ° or less, preferably 15 ° or less).
As described above, in the event of a collision accident, the foot M1 of the occupant M can be kept within the movable range, and the impact on the lower limb can be mitigated to reduce the lower limb injury value (Tibia Index) of the occupant M.

  FIG. 2 shows the shock absorbing structure 1 in an exploded manner. In the upper right of FIG. 2, the back side 20b of the footrest pad 20 is shown. FIG. 3 shows an example of a vertical cross section along the front-rear direction D <b> 1 of the shock absorbing structure 1 at a position passing through the first fitting member 30 and the second fitting member 40. In FIG. 3, a state in which the footrest pad 20 slides rearward together with the floor carpet 90 when the impact force F <b> 1 is input is indicated by a two-dot chain line. FIG. 4 shows an example of a vertical cross section along the vehicle width direction D <b> 3 of the shock absorbing structure 1 at a position passing through the attachment member 50. 3 and 4, the positions of the vehicle body panel 80 and the floor carpet 90 are indicated by two-dot chain lines. 5 and 6 show the first fitting member 30. In the upper part of FIG. 5, a vertical section of the extension main body 35 is shown. The upper side of the first fitting member 30 is shown in the upper part of FIG. 7 and 8 show the second fitting member 40. The upper side of the second fitting member 40 is shown in the upper part of FIG. FIG. 9 schematically shows an example in which the first fitting member 30 provided on the floor pad 10 is fitted with the second fitting member 40 provided on the footrest pad 20. FIG. 10 shows the first fitting member 30 and the second fitting member 40 fitted to each other. In the lower part of FIG. 10, a horizontal section of the fitting members 30 and 40 at the position A1-A1 is shown. FIG. 11 shows an example of the attachment member 50 and its periphery. 12 to 14 show the attachment member 50. In FIG. 13, the position of the bracket 85 is indicated by a two-dot chain line. In FIG. 14, the clip 70 attached to the base member 60 is indicated by a two-dot chain line. The upper side of the base member 60 is shown on the upper side of FIG.

  In the above drawings, the symbol D1 indicates the front-rear direction of the automobile 100, the symbol D2 indicates the vertical direction, and the symbol D3 indicates the vehicle width direction that is the left-right direction of the automobile 100. Reference sign S1 indicates the front side, reference sign S2 indicates the rear side, reference sign S3 indicates the front end side of the front-rear extension part 44 of the second fitting member 40, and reference sign S4 indicates the root side of the front-rear extension part 44. Reference numeral S5 indicates a tip end side of the cross extension part 33 of the first fitting member 30, reference numeral S6 indicates a root side of the cross extension part 33, and reference numeral S7 indicates a locking part 34 of the cross extension part 33. The reference sign S11 indicates the outer side with respect to the recess 61 of the mounting member 50, and the reference sign S12 indicates the inner side with respect to the recess 61. In this example, the extending direction of the front / rear extending part 44 substantially coincides with the front / rear direction D1, but the extending direction of the front / rear extending part 44 and the strict front / rear direction D1 are within a range of, for example, 30 ° or less. Also included in the present technology is a case where they do not match, for example, they deviate within. In this specific example, the extending direction of the cross extending portion 33 is substantially coincident with the up-down direction D2 and is substantially orthogonal to the extending direction of the cross extending portion 33. The present technology includes a case where the angle formed with the extending direction of the protruding portion 44 is not 90 °, for example, 60 ° or more and less than 90 °.

  As shown in FIGS. 2 to 4 and the like, the shock absorbing structure 1 of this specific example includes a floor pad 10, a footrest pad 20, a first fitting member 30, a second fitting member 40, and an attachment member 50. Yes.

The floor pad 10 and the footrest pad 20 are formed of a material that absorbs impact, for example, is formed using a foam material, but may be formed by collecting and molding fibers such as thermoplastic resin fibers. . The material of these pads 10 and 20 is preferably a material obtained by foaming a resin molding material having a synthetic resin from the viewpoint of absorbing an impact. As the resin molding material to be foamed, a resin molding material having a thermoplastic resin is preferable because of easy molding. As the thermoplastic resin, polystyrene (PS), polypropylene (PP), polyethylene (PE), acrylic styrene, a combination thereof, or the like can be used. The resin molding material may contain an additive such as a filler. When the pads 10 and 20 are formed by foaming a thermoplastic resin, the pads are formed after forming a large number of foamable resin particles that are pre-foamed by impregnating a foamed bead or cylindrical plastic with a foaming agent. A bead foam molded body may be formed by filling a large number of expandable resin particles in a mold having a shape of 10, 20 and further heat-foaming and fusion-molding. When cylindrical expandable resin particles such as a cylindrical shape are used, the sound absorption of the pads 10 and 20 can be improved. Alternatively, the foamed resin molding material may be injected into a mold having the shape of the pads 10 and 20 to be molded. As the foaming agent, volatile foaming agents that generate hydrocarbons such as butane and pentane, inorganic foaming agents that generate carbon dioxide gas such as ammonium carbonate, and the like can be used. The foaming ratio of the pads 10 and 20 can be about 10 to 50 times, for example. The density of the pads 10 and 20 can be, for example, about 0.02 to 0.1 g / cm ³ .

  The floor pad 10 includes an uneven portion 11 on the front edge portion of the front side (upper side) 10a, an insertion portion 12 of the cross extension portion 33 of the first fitting member 30, a step portion 13 on the back side (lower side) 10b, and a convex portion on the back side. And so on. The concavo-convex portion 11 is a portion that fits with the concavo-convex portion 21 of the footrest pad 20, and has a concave portion 11 a into which the convex portion 21 a of the concavo-convex portion 21 of the footrest pad 20 is inserted. The insertion portion 12 is a through hole that passes through the cross extension portion 33 of the first fitting member 30 upward. The step portion 13 is located on the front side S1 from the insertion portion 12 via the standing wall portion 13a, and is one step lower than the rear side of the insertion portion 12 in a vertical section passing through the insertion portion 12 as shown in FIG. The convex portion 15 is a portion that is inserted into the concave portion 61 of the mounting member 50, is provided at a position P <b> 1 shown in FIG. 2, and protrudes downward on the back side 10 b of the floor pad 10. As shown in FIG. 12, the convex part 15 is formed in a substantially quadrangular prism shape although it has a tapered shape for die cutting. Here, the tip (lower surface) of the convex portion 15 is referred to as an outer bottom surface 15a, and the four surfaces surrounding the convex portion 15 around a virtual axis passing through the convex portion 15 along the vertical direction D2 are referred to as outer surfaces 15b. To do. A hole 16 into which the hook portion 65a of the opening / closing portion 65 of the mounting member 50 is inserted is formed at a position that becomes the root portion of the convex portion 15 on the outer surface of the entire floor pad 10.

  The footrest pad 20 has an uneven portion 21 on the front edge portion of the back side (lower side) 20b, an insertion portion 22 of the second fitting member 40, and the like. The concavo-convex portion 21 is a portion that fits with the concavo-convex portion 11 of the floor pad 10, and has a convex portion 21 a for insertion into the concave portion 11 a of the concavo-convex portion 11 of the floor pad 10. When an impact force F1 is applied to the footrest pad 20 from the front, the convex portion 21a comes out from the concave portion 11a to the rear side S2, and the fitting of the concave and convex portions 11, 21 is released. The insertion portion 22 is a through hole that allows the second fitting member 40 to pass downward. On the front side (upper side) of the insertion part 22, a locking part 22 a on which the pantograph structure part 42 of the second fitting member 40 is placed is arranged. The locking portion 22 a is formed in a planar shape along the surface of the back side 20 b of the footrest pad 20. On the back side (lower side) of the insertion portion 22, a recess 22 b into which the front-rear extension portion 44 of the second fitting member 40 enters is formed.

The fitting members 30 and 40 are formed of a material exhibiting elasticity, and are formed using, for example, resin, but are not limited to resin. As the synthetic resin, a resin molding material having a thermoplastic resin is preferable because of easy molding. As the thermoplastic resin, PP, PE, PS, a combination thereof, a modified resin obtained by adding an elastomer to these resins, and the like can be used. Although the manufacturing method of the fitting members 30 and 40 is not specifically limited, General shaping | molding which injection-molds a molding material is employable. The resin molding material may contain an additive such as a filler. From the viewpoint of making the fitting members 30 and 40 more rigid than the pads 10 and 20, it is preferable not to use a foaming material at the time of molding, but a small amount of foaming material with a foaming ratio of, for example, 5 times or less is used. May be. The density of the fitting members 30 and 40 can be, for example, about 0.2 to 1.2 g / cm ^{3 in a} range higher than the density of the pads 10 and 20. Since the fitting members 30 and 40 have a higher density and higher rigidity than the pads 10 and 20, a feeling of rigidity when the foot M <b> 1 is placed on the footrest portion 92 is improved.

  A first fitting member 30 shown in FIGS. 5, 6, etc. is attached to the floor pad 10, and roughly includes a base portion 31 disposed on the back side (lower side) of the insertion portion 12 of the floor pad 10, and the insertion portion 12. It has a cross-extending portion 33 that passes therethrough.

  The base 31 includes a separation extending portion 32a extending downward along the standing wall portion 13a of the floor pad 10 from the front edge portion of the substantially horizontal main body portion, and a floor pad extending from the distal end edge of the separation extending portion 32a. It has the bending extension part 32b extended to the front side S1 along the 10 step part 13. As shown in FIG. As a result, when the impact force F1 is input to the footrest pad 20, the first fitting member 30 is prevented from rotating in a direction in which the distal end portion 33a of the cross extending portion 33 falls to the rear side. Since the front and rear extension 44 of the second fitting member 40 is easily removed rearward, the fitting of the fitting members 30 and 40 is released, and the effect of reducing the lower limb injury value is improved.

The cross extension part 33 includes an extension part main body 35, a first branch extension part 36, and a second branch extension part 37, and a locking part 34 is formed. It is extended. Therefore, the cross extension part 33 crosses the front (front-rear direction D1) which is the extension direction of the front-rear extension part 44 of the second fitting member 40.
The extension part main body 35 extends until it abuts against the front-rear extension part 44. In the extension part main body 35, as shown in the upper part of FIG. 5, an inclined surface 35a chamfered at the corner between the surface of the rear side S2 and the front end surface is formed. By having the inclined surface 35a on the rear side S2, the front and rear extension portion 44 is guided to the locking portion 34 when the front and rear extension portion 44 of the second fitting member 40 is inserted into the locking portion 34 from the rear side S2. Inserted smoothly. Further, since the inclined surface 35a on the rear side S2 is provided, when the impact force F1 is input to the footrest pad 20, the front / rear extending portion 44 is easily pulled out rearward from the engaging portion 34, so that the fitting members 30, 40 The fitting is released, and the effect of reducing the lower limb injury value is improved.

  The first branch extending portion 36 and the second branch extending portion 37 extend from the extending portion main body 35 to the distal end portion 33 a at a position sandwiching the front and rear extending portion 44 of the second fitting member 40. The branch extension parts 36 and 37 have surfaces (opposing surfaces 36b and 37b) facing the other branch extension part. At the tip end portions of the branch extending portions 36 and 37, bulging portions 36e and 37e protruding from the opposing surfaces 36b and 37b toward each other are formed. Therefore, the extension part main body 35 and the branch extension parts 36 and 37 move forward (front-rear direction D1) so that the front-rear extension part 44 can be extracted rearward (front-rear direction D1) when the impact force F1 is input. A locking portion 34 that is inserted and locked is formed in the cross extension portion 33.

  Between the distal end portion of the first branch extending portion 36 and the distal end portion of the second branch extending portion 37, the front / rear extending portion 44 can be detached from the locking portion 34 to the distal end side S5 when the impact force F1 is input. A gap 34a is formed so that As shown in FIG. 3, a rotational force F <b> 2 in which the front side of the footrest pad 20 is separated from the floor pad 10 may be generated in the footrest pad 20 due to an impact force F <b> 1 from the front. In this case, since the front-rear extension part 44 is displaced from the horizontal direction, there is a possibility that the resistance when the front-rear extension part 44 comes out rearward (front-rear direction D1) from the locking part 34 may increase. If there is a gap 34a at the distal end portion 33a of the cross extending portion 33, the front and rear extending portion 44 is disengaged from the locking portion 34 to the distal end side S5, so that the fitting of the fitting members 30 and 40 is released, resulting in lower limb injury values. The reduction effect is improved. At normal times, the bulging portions 36e and 37e prevent the front and rear extending portion 44 from being detached from the locking portion 34. In addition, grooves 36a and 37a that are recessed inward in the vehicle width direction D3 on the outer surface of the cross extension portion 33 in the vehicle width direction D3 are formed along the front-rear direction D1 at the root portions of the branch extension portions 36 and 37. Is formed. As a result, the rigidity of the root portions of the branch extending portions 36 and 37 is moderately weakened, and the front / rear extending portion 44 easily disengages from the locking portion 34 to the distal end side S5 when the impact force F1 is input, thereby reducing the lower limb injury value. Reduction effect is improved.

  In the branch extending portions 36 and 37, corners of the opposing surfaces 36 b and 37 b and the surfaces 36 c and 37 c on the distal end side S 3 of the front and rear extending portion 44 inserted in the locking portion 34 are chamfered. Inclined surfaces 36d and 37d are formed. As shown in the upper part of FIG. 6, these inclined surfaces 36 d and 37 d have an inclination that moves away from the other branch extending portion as it becomes the distal end side S <b> 3 of the front and rear extending portion 44. Thereby, when the impact force F1 is input, the front / rear extension portion 44 is easily removed from the locking portion 34, and the effect of reducing the lower limb injury value is improved. Further, since the inclined surfaces 36d and 37d are formed continuously with the bulging portions 36e and 37e, the front and rear extension portion 44 moves from the locking portion 34 to the distal end S5 when the rotational force F2 is generated by the impact force F1. It is easy to come off and the effect of reducing the lower limb injury value is improved.

  The surfaces of the bulging portions 36e and 37e that face the distal end surface of the extending portion main body 35 become the distal end side S5 (away from the extending portion main body 35) as they approach the other branch extending portion, and the inclined surfaces 36f and 37f. Has been. Thereby, when the rotational force F2 is generated by the impact force F1, the front-rear extension part 44 is easily detached from the locking part 34 to the distal end side S5, and the effect of reducing the lower limb injury value is improved.

  The second fitting member 40 shown in FIGS. 7 and 8 is attached to the footrest pad 20 and is generally disposed on the front side (upper side) of the insertion portion 22 and the base portion 41 disposed on the insertion portion 22 of the footrest pad 20. It has a pantograph structure part 42, an extending base 43 disposed on the back side (lower side) of the insertion part 22, and a front / rear extending part 44 extending forward (front-rear direction D 1) from the extending base 43.

  The pantograph structure portion 42 connected to the base portion 41 has a claw portion 42a protruding downward at an upper portion and a locking portion 42b for locking the claw portion 42a at a lower portion. When the claw portion 42a is pushed downwardly through the second fitting member 40 from the lower side to the insertion portion 22 of the footrest pad 20 to be locked to the locking portion 42b, the pantograph structure portion 42 is formed as shown in FIGS. The second fitting member 40 is fixed to the footrest pad 20 by being locked to the locking portion 22 a of the footrest pad 20.

The front-rear extension part 44 connected to the front of the extension base part 43 connected to the bottom of the base part 41 includes a positioning part 45 extending from the extension base part 43 to the tip part 44a and the root of the front-rear extension part 44 from the tip part 44a. It has a pair of left and right flexures 46 folded back to the side S4.
The positioning portion 45 is disposed above the bending portion 46, that is, on the distal end side S5 of the cross extension portion 33, and positions the front and rear extension portion 44 between the branch extension portions 36 and 37 in the vehicle width direction D3. .

  The bending portion 46 is disposed below the positioning portion 45, that is, on the base side S6 of the cross extension portion 33, and can be bent inward in the vehicle width direction D3 without interfering with the positioning portion 45. ing. Each of the flexures 46 has a guide surface 46a that spreads outward in the vehicle width direction D3 in order from the tip end portion 44a toward the root side S4, and the engaged surface whose angle is changed from the guide surface 46a to the inside in the vehicle width direction D3. It has the stop surface 46b and the contact surface 46c which changed the angle from this to-be-latched surface 46b to the outer side of the vehicle width direction D3. The guide surface 46a smoothly bends the bending portion 46 inward in the vehicle width direction D3 when the front-rear extension portion 44 is inserted into the locking portion 34 of the cross extension portion 33. In FIG. 8, the positions of the guide surface 46 a and the locked surface 46 b of the bent portion 46 that is bent when the front and rear extending portion 44 is inserted are indicated by broken lines. The locked surface 46 b is an inclined surface that gets over the locking portion 34 and is locked to the locking portion 34 when the front-rear extension portion 44 is inserted into the locking portion 34. As shown in FIG. 10, the locked surface 46b becomes front and rear as it becomes the outer side in the vehicle width direction D3 (side S7 descending from the locking portion 34) in accordance with the inclined surfaces 36d and 37d of the branch extending portions 36 and 37. It inclines so that it may become the front end side S3 of the extension part 44. FIG. The contact surface 46c abuts against the opposing surfaces 36b and 37b of the branch extending portions 36 and 37 when the bent portion 46 gets over the locking portion 34.

  FIG. 9 shows an example in which the first fitting member 30 attached to the floor pad 10 and the second fitting member 40 attached to the footrest pad 20 are fitted. When attaching the first fitting member 30 to the floor pad 10, the cross extending portion 33 of the first fitting member 30 may be inserted upward from the distal end portion 33 a into the insertion portion 12 of the floor pad 10. When the base 31 hits the back side of the insertion part 12, the extension part main body 35 is arranged in the insertion part 12, and the branch extension parts 36 and 37 come out to the front side 10 a of the floor pad 10. When attaching the second fitting member 40 to the footrest pad 20, the second fitting member 40 may be inserted upward from the pantograph structure portion 42 into the insertion portion 22 of the footrest pad 20. When the extended base 43 hits the back side of the insertion part 22, the base part 41 is arranged in the insertion part 22 and the pantograph structure part 42 comes out to the front side of the insertion part 22. In this state, when the pantograph structure part 42 is pushed downward to engage the claw part 42 a with the engaging part 42 b, the second fitting member 40 is fixed to the footrest pad 20.

  As shown in FIG. 9, when the front / rear extension part 44 is inserted into the locking part 34 of the cross extension part 33 from the rear side S2, the guide surface 46a is branched and extended part 36, 37 as shown in FIG. When the bent portion 46 is bent inward in the vehicle width direction D3 and the locked surface 46b gets over the branch extending portions 36, 37, the contact surface 46c hits the opposing surfaces 36b, 37b. As a result, the locked surface 46b and the inclined surfaces 36d, 37d of the branch extending portions 36, 37 face each other, and the bending portion 46 is locked to the locking portion 34. That is, the first fitting member 30 and the first fitting member 30 The two fitting members 40 are fitted, and this fitting is not released at the normal time. Here, since the to-be-latched surface 46b is inclined so as to become the tip side S3 of the front-rear extension part 44 as it comes to the side S7 descending from the locking part 34, when the impact force F1 is input, from the locking part 34 The front-rear extension part 44 is easy to come off, and the effect of reducing the lower limb injury value is improved. Further, since the bending portion 46 that protrudes outward in the vehicle width direction D3 from the positioning portion 45 is disposed on the root side S6 of the cross extension portion 33 relative to the positioning portion 45, the rotational force F2 is generated by the impact force F1. The front-rear extension part 44 easily disengages from the locking part 34 to the distal end side S5, and the effect of reducing the leg injury value is improved.

  When an impact force F1 is applied to the footrest pad 20 from the front, the footrest pad 20 is crushed to some extent to absorb the impact. Further, the bent portion 46 is once bent inward in the vehicle width direction D3 along the inclined surfaces 36d and 37d of the branch extending portions 36 and 37, and the second fitting member 40 is separated from the first fitting member 30. As shown by a two-dot chain line in FIG. 3, the footrest pad 20 slides rearward (front-rear direction D <b> 1) together with the floor carpet 90. Thereby, as shown in FIG. 1, the change of the angle which leg M1 and shin M2 make is suppressed, and the reduction effect of a leg injury value is acquired. In addition, when a frontal impact test of an automobile was conducted by using a shock absorbing structure in which a footrest pad was bonded to the back of a floor carpet without using a fitting member as a comparative example, the lower limb of the example in which the shock absorbing structure of the present technology was mounted The injury value was smaller than the lower limb injury value of the comparative example.

As described above, the shock absorbing structure 1 of this specific example is provided on the resin-made first fitting member 30 provided on the foamed resin floor pad 10 and the footrest pad 20 made of foamed resin. The second fitting member 40 made of resin is fitted so as to be separable when an impact is input from the front. Therefore, this specific example can improve the rigidity when the foot M1 is placed on the footrest portion 92 at the normal time.
Moreover, since the impact-absorbing structure 1 is divided into four parts, the floor pad 10, the footrest pad 20, the first fitting member 30, and the second fitting member 40, the packaging state of the parts is improved. For example, in the case of a specification in which a footrest pad is bonded to the back of a floor carpet without using a fitting member, the footrest pad is bulky, so that the load form of stacking the floor carpet is biased. This specific example can eliminate the unevenness of the load and can eliminate the work of bonding the footrest pad to the floor carpet.

  The attachment member 50 illustrated in FIGS. 11 to 14 and the like roughly includes a base member 60 and a clip 70. The clip 70 is attached to a bracket 85 (attachment object 75) attached to the floor panel 81 (vehicle body panel 80). The clip 70 may be directly attached to the vehicle body panel 80. In this case, the vehicle body panel 80 becomes the attachment object 75 of the clip 70. The clip 70 integrated with the base member 60 constitutes a clip body 71 of the mounting member 50. As the clip 70, a general-purpose clip for attaching between members in an automobile can be used, and a so-called dharma clip or the like as shown in FIG. 13 or the like can be used.

  The base member 60 and the clip 70 are formed of a material exhibiting elasticity, and are formed using, for example, resin, but are not limited to resin. As the synthetic resin, a resin molding material having a thermoplastic resin is preferable because of easy molding. As the thermoplastic resin, PP, PE, PS, polyacetal (POM), polybutylene terephthalate (PBT), polyamide, a combination thereof, or the like can be used. Although the manufacturing method of the base member 60 and the clip 70 is not particularly limited, general molding such as injection molding of a molding material can be employed. The resin molding material may contain an additive such as a filler. From the viewpoint of making the fitting members 30 and 40 more rigid than the pads 10 and 20, it is preferable not to use a foam material at the time of molding, but it does not exclude the use of a very small amount of foam material. The density of the base member 60 and the clip 70 is higher than the density of the pads 10 and 20.

  The base member 60 generally includes a recess 61 and a clip attachment portion 68 for attaching the clip 70. The convex portion 15 of the floor pad 10 is inserted into the concave portion 61. The base member 60 includes a side surface portion 63 that surrounds the convex portion 15 and forms four inner side surfaces 61 b of the concave portion 61, and a bottom portion 62 of the concave portion 61 as forming elements of the concave portion 61. The side surface part 63 has a fixing part 64 that forms three inner side surfaces 61b, and an opening / closing part 65 that is formed with a notch part 63a connected to the opening 61a of the recess 61 when opened to the outer side S11.

Locking portions 64a projecting toward the opening / closing portion 65 are formed at the two fixing portions 64 adjacent to the notch 63a. Each locking part 64a is formed in a hook shape that locks the side edge of the opening / closing part 65 with the notch 63a closed. The fixing part 64 facing the notch part 63a has a protrusion 64b that protrudes into the inner side S12 and sticks into the convex part 15. 12 to 14 are formed in a triangular pyramid shape.
The opening / closing part 65 is connected to the edge part of the bottom part 62 on the side of the notch part 63a via the hinge part 65b, and in the opened state, the tip part is bent upward to form a hook part 65a. That is, the opening / closing part 65 has a hooking part 65a hooked on the convex part 15 in the closed state at the tip part. The base member 60 can be integrally injection-molded with the opening / closing portion 65 and the remaining portion using the hinge portion 65b as an integral hinge. In this case, the base member 60 in a state where the opening / closing portion 65 is opened has a shape of an injection molded product.

As shown in FIG. 14, when the base portion 70 a of the clip 70 is inserted into the clip attachment portion 68 from the opening 68 a of the clip attachment portion 68, the clip 70 can be detachably attached to the base member 60. Thereby, the attachment member 50 in which the base member 60 and the clip 70 are integrated is formed.
As shown in FIG. 12, when the convex portion 15 is inserted into the concave portion 61 from the notch portion 63 a with the opening / closing portion 65 opened, the protrusion 64 b pierces the convex portion 15. At this time, the outer bottom surface 15 a of the convex portion 15 faces the bottom portion 62 of the concave portion 61, and the three outer surfaces 15 b of the convex portion 15 face the inner side surface 61 b of the concave portion 61. When the opening / closing part 65 is closed so as to face the outer side surface 15b in which the hole 16 is formed in the convex part 15, the hook part 65a enters the hole 16 of the convex part 15 and is caught by the convex part 15, whereby the base member 60 is moved. Fixed to the floor pad 10.

  When the clip 70 (clip body 71) attached to the clip attachment portion 68 inserted into the recess 61 and fixed to the floor pad 10 is attached to the bracket 85, an impact is applied to the vehicle body C 1 side of the vehicle body panel 80. Absorption structure 1 is installed. This example is highly effective when the floor pad (impact absorber) is bulky. Further, when the clip 70 is damaged, the shock absorbing structure 1 can be installed on the vehicle body C1 side of the vehicle body panel 80 anew by attaching the new clip 70 to the clip attachment portion 68 and attaching it to the bracket 85.

  Further, since the clip is used for mounting the shock absorber, the shock absorber can be fixed to the mounting object by making a hole in the vehicle body panel or the bracket attached to the vehicle body panel. For example, when using a stud bolt welded to a vehicle body panel without using a clip for mounting an impact absorber, it is necessary to have a place where the stud bolt protrudes, and it is necessary to weld the stud bolt to the vehicle body panel. Stud bolts welded to non-horizontal parts such as panels will deviate from the vertical direction. Further, when the resin cover to be attached to the vehicle body panel is provided with a concave shape, and the convex shape that falls into the concave shape is provided on the shock absorber, it is necessary to design the resin cover according to the shape of the vehicle body panel. In this example, since the shock absorber can be fixed to the vehicle body panel with a general-purpose clip, the shock absorber can be easily attached.

(3) Modification:
Various modifications can be considered for the present invention.
The rug may be a floor mat other than the floor carpet. Further, the skin material may be integrated with the floor pad as a rug, or the skin material may be integrated with the footrest pad as a rug. These cases are also included in the present technology.
In the above-described embodiment, the cross fitting portion 33 is formed in the first fitting member 30 and the front and rear extending portion 44 is formed in the second fitting member 40. However, the first fitting member on the floor pad side is rearward. A front / rear extension portion may be formed, and a cross extension portion may be formed on the second fitting member on the footrest pad side.

The position of the protrusion 64b of the attachment member 50 is preferably the fixing portion 64 adjacent to the notch 63a or the opening / closing portion 65, although the fixing portion 64 facing the notch 63a is preferable. Further, the shape of the protrusion 64b may be a conical shape, a cylindrical shape, a polygonal column shape, or the like other than the triangular pyramid shape.
The attachment member 50 may be a member in which the base member 60 and the clip 70 are integrated so as not to be separated.

In addition, if there exists a floor pad, a footrest pad, a 1st fitting member, and a 2nd fitting member, even if it is an impact-absorbing structure without an attachment member etc., the fundamental effect of the aspect 1 of this technique will be acquired.
If there is a floor pad and a base member, the basic effect of aspect 6 of the present technology can be obtained even with an impact absorbing structure without a footrest pad or the like.
If there is a floor pad and a mounting member, the basic effect of aspect 9 of the present technology can be obtained even with an impact absorbing structure without a footrest pad or the like.

(4) Conclusion:
As described above, according to the present invention, according to various aspects, an impact absorbing structure that can improve the feeling of rigidity when a foot is placed on a footrest portion in a normal state, an impact formed using a foam material. A technique such as a novel shock absorbing structure that suitably fixes the absorber can be provided. Of course, the above-described basic functions and effects can be obtained even with a technique that does not have the constituent elements according to the dependent claims but includes only the constituent elements according to the independent claims (including the aspects described in the embodiments). .
In addition, the configurations disclosed in the embodiments and modifications described above are mutually replaced, the combinations are changed, the known technology, and the configurations disclosed in the embodiments and modifications described above are mutually connected. It is possible to implement a configuration in which replacement or combination is changed. The present invention includes these configurations and the like.

1 ... shock absorbing structure,
10 ... floor pad (impact absorber), 10a ... front side, 10b ... back side,
DESCRIPTION OF SYMBOLS 11 ... Uneven part, 11a ... Concave part, 12 ... Insertion part, 13 ... Step part, 13a ... Standing wall part,
15 ... convex portion, 15a ... outer bottom surface, 15b ... outer side surface, 16 ... hole,
20 ... Footrest pad, 20b ... Back side,
21 ... Uneven portion, 21a ... Convex portion, 22 ... Insertion portion, 22a ... Locking portion, 22b ... Depression,
30 ... 1st fitting member, 31 ... Base, 32a ... Separation extension part, 32b ... Bending extension part,
33 ... cross extension part, 33a ... tip part, 34 ... locking part, 34a ... gap,
35 ... Extension body, 35a ... Inclined surface,
36 ... 1st branch extension part, 37 ... 2nd branch extension part,
36a, 37a ... groove, 36b, 37b ... opposite surface,
36c, 37c ... front end side surface of the front and rear extension part, 36d, 37d ... inclined surface,
36e, 37e ... bulging part, 36f, 37f ... inclined surface,
40 ... second fitting member, 41 ... base, 42 ... pantograph structure,
43 ... Extension base part, 44 ... Front and rear extension part, 44a ... Tip part, 45 ... Positioning part,
46 ... Deflection part, 46a ... Guide surface, 46b ... Locked surface, 46c ... Contact surface,
50 ... Mounting member,
60 ... Base member, 61 ... Recess, 61a ... Opening, 61b ... Inner surface, 62 ... Bottom,
63 ... side part, 63a ... notch part, 64 ... fixing part, 64a ... locking part, 64b ... projection,
65 ... Opening / closing part, 65a ... Hook part, 65b ... Hinge part,
68: Clip mounting portion, 68a: Opening,
70 ... clip, 70a ... base, 71 ... clip body,
75 ... Installation target,
80 ... body panel, 81 ... floor panel, 82 ... to board, 83 ... dash panel,
85 ... Bracket,
90 ... floor carpet (rug), 91 ... general part, 92 ... footrest part,
100 ... car,
C1: Car compartment, D1: Front-rear direction, D2: Vertical direction, D3: Vehicle width direction,
F1 ... impact force, F2 ... rotational force,
FL1 ... floor surface, M ... occupant, M1 ... foot, M2 ... shin,
S1 ... front side, S2 ... rear side, S3 ... tip end side of front and rear extension part, S4 ... root side of front and rear extension part,
S5 ... the tip side of the cross extension part, S6 ... the root side of the cross extension part, S7 ... the side descending from the locking part,
S11 ... outside, S12 ... inside.

Claims (4)

An impact absorbing structure installed on the passenger compartment side of a vehicle body panel on the side of a vehicle body panel,
Floor pads,
A footrest pad disposed on the floor pad;
A first fitting member provided on the floor pad;
A second fitting member provided on the footrest pad, fitted to the first fitting member, and separable from the first fitting member when an impact force is applied to the footrest pad from the front; Prepared ,
Of the first fitting member and the second fitting member, one fitting member has a front-rear extending portion that extends in the front-rear direction of the automobile, and the other fitting member crosses the front-rear direction. Crossed extension part,
The cross extension portion is inserted and locked in the front-rear direction so that the front-rear extension portion can be pulled out in the front-rear direction when an impact force is applied to the footrest pad from the front. Having a stop,
A shock absorbing structure in which a gap is formed at a distal end portion of the cross extending portion so that the front and rear extending portion can be detached from the locking portion toward the distal end side when the impact force is applied. body. The cross extension part includes an extension part main body that extends until it abuts against the front and rear extension part, and a first branch extension that extends from the extension part main body to a tip part at a position sandwiching the front and rear extension part. And having an extension part and a second branch extension part,
In at least one branch extension part of the first branch extension part and the second branch extension part, a surface facing the other branch extension part, and the front-rear extension part inserted in the locking part 2. The shock absorbing structure according to claim 1 , wherein an inclined surface that is separated from the other branch extending portion toward the leading end side of the front-rear extension portion is formed at a corner portion of the front-end-side surface of the first and second ends. . An impact absorbing structure installed on the passenger compartment side of a vehicle body panel on the side of a vehicle body panel,
Floor pads,
A footrest pad disposed on the floor pad;
A first fitting member provided on the floor pad;
A second fitting member provided on the footrest pad, fitted to the first fitting member, and separable from the first fitting member when an impact force is applied to the footrest pad from the front; Prepared,
Of the first fitting member and the second fitting member, one fitting member has a front-rear extending portion that extends in the front-rear direction of the automobile, and the other fitting member crosses the front-rear direction. Crossed extension part,
The cross extension portion is inserted and locked in the front-rear direction so that the front-rear extension portion can be pulled out in the front-rear direction when an impact force is applied to the footrest pad from the front. Having a stop,
The front-rear extension portion has a bending portion that is locked to the locking portion after getting over the locking portion when inserted into the locking portion of the cross extension portion,
Inclined so that the surface of the bent portion that gets over the locking portion and locked to the locking portion becomes the front end side of the front-rear extension portion as it becomes the outer side in the vehicle width direction of the automobile . Shock absorbing structure. The floor pad and the footrest pad are formed using a foam material, and the first fitting member and the second fitting member are formed using a resin and have a higher density than the floor pad and the footrest pad. The shock absorbing structure according to any one of claims 1 to 3 .

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