JP2015151105A - Vehicle body panel structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vehicle body panel structure excellent in higher sound proof performance and active vibration control performance for achieving a quiet cabin space.SOLUTION: A vehicle body panel structure comprises: an outer panel 13; a fastening member 17 disposed on a rear surface of the outer panel 13; and an active vibration control reinforcement material 15 having a base material layer 15a having active vibration control and sound suction performances, a pair of skin layers 15b, 15c disposed on front and rear surfaces of the base material layer 15a respectively, and plural penetrating holes 18 disposed on the skin layers 15b, 15c with required diameter and pitch and being attached to the rear surface of the outer panel 13 via the fastening member 17.

Description

  The present invention relates to a vehicle body panel structure, and more particularly to a vehicle body panel structure used as a panel such as a roof panel, a door panel, and a trunk side panel of an automobile.

  Conventionally, a panel structure of a vehicle body member such as an automobile is foamed in the space between the back surface of the outer panel and the inner panel as a means for sound absorption, vibration suppression and reinforcement in order to keep the interior space quiet. A structure in which a vibration-damping reinforcing material (insulator) made of a molded body or the like is provided is known (see, for example, Patent Document 1).

  In particular, the roof panel part is reinforced by setting a roof bow for domestic-spec cars to prevent the panel from being dented against snow and loads from above. As shown, a vibration-damping reinforcing material made of a foamed molded body or the like is attached to the back surface of the outer panel.

JP 2013-78985 A

  However, in a panel structure using a vibration-damping reinforcing material made of a conventional foamed molded body or the like like the vibration-damping reinforcing material described in Patent Document 1, it is possible to suppress panel vibration. Absorbing the transmitted sound is negligible, and there is a problem that sufficient soundproofing performance cannot be obtained.

  Therefore, the present invention has been made in view of the above-described problems, and an object of the present invention is to provide a vehicle body panel structure with higher soundproofing performance and vibration control performance in order to realize a quiet interior space.

  The present invention has been proposed in order to achieve the above object. (1) The present invention includes an outer panel, a fixing member disposed on the back surface of the outer panel, and a base having vibration damping and sound absorbing functions. A material layer, a pair of skin layers laminated on both sides of the base material layer, and a plurality of through holes provided in the skin layer with a required hole diameter and pitch And a vibration-proof reinforcement member attached to the back surface of the outer panel via the fixing member.

  (2) The present invention provides the vehicle body panel structure according to (1), wherein at least one of the pair of skin layers in which the plurality of holes are respectively laminated on the front and back surfaces of the base material layer. Provided is a vehicle body panel structure provided in a layer.

  (3) The present invention provides a vehicle body panel structure according to (1) or (2), wherein the skin layer is formed of a single material or a composite material.

  (4) The present invention provides the vehicle body panel structure according to any one of (1) to (3), wherein the base material layer is formed of a corrugated partition body in which a cross-sectional shape repeats unevenness, A body panel structure is provided.

  (5) The present invention provides the vehicle body panel structure according to (4), wherein the base material layer includes an upper layer and a lower layer provided with the corrugated partition walls, and the upper layer and the lower layer. There is provided a vehicle body panel structure having a sheet-like intermediate layer disposed therebetween.

  (6) The present invention provides the vehicle body panel structure according to (5), wherein the uneven pitch of the upper layer is different from the uneven pitch of the lower layer.

  (7) According to the present invention, in the vehicle body panel structure according to any one of (4) to (6), the hole of the skin layer is formed corresponding to a concave portion of the partition wall. A body panel structure is provided.

  (8) The present invention provides the vehicle body panel structure according to any one of (1) to (3), wherein the base material layer has a vertical stripe shape in a plan view and extends in the front and back double-side directions. A vehicle body panel structure is provided.

  (9) The present invention provides the vehicle body panel structure according to (8), wherein the partition walls are arranged in a lattice shape in plan view.

  (10) The present invention provides the vehicle body panel structure according to (8), in which the partition walls are arranged in a lattice shape in plan view.

  (11) The present invention provides a vehicle body panel structure in which the partition wall is formed in a circular cylindrical shape.

  According to the present invention, the vibration transmitted through the panel can be absorbed by the holes provided in the skin layer while the vibration of the panel is suppressed by the vibration damping reinforcing material, so that the noise transmitted to the interior space side Is reduced. Further, by changing the hole diameter and the pitch of the holes, it is possible to tune so as to absorb the frequency range of the panel transmitted sound in question. In addition, noise transmitted to the indoor side can be reduced by the holes provided in the vibration damping reinforcement material, so the sound absorbing material set in the interior trim such as the head lining can be removed accordingly, and the cost is reduced. And weight reduction is possible.

It is a longitudinal cross-sectional view which shows typically the principal part of the motor vehicle to which the vehicle body panel structure which concerns on this invention was applied. It is sectional drawing which shows 1st Embodiment of the vehicle body panel structure which concerns on this invention (equivalent to the AA line cross section of FIG. 1). It is a figure which shows the damping reinforcement material in 1st Embodiment, (a) is a perspective view of the damping reinforcement material seen from the upper surface side, (b) is a top view of a damping reinforcement material. It is a figure explaining the sound absorption effect | action of the damping reinforcement in 1st Embodiment. It is a figure which shows an example of the verification result data of the vehicle body panel structure in 1st Embodiment. 2A and 2B are views showing a second embodiment of a vehicle body panel structure according to the present invention, in which FIG. 1A is a cross-sectional view of the vehicle body panel structure (corresponding to a cross section taken along line AA in FIG. 1), and FIG. It is a top view of a reinforcing material. FIG. 8 is a view showing a third embodiment of a vehicle body panel structure according to the present invention, in which (a) is a cross-sectional view of the vehicle body panel structure (corresponding to a cross section taken along line AA in FIG. 1), and (b) is a vibration damping. It is a top view of a reinforcing material. 4 shows a fourth embodiment of a vehicle body panel structure according to the present invention, wherein (a) is a cross-sectional view of the vehicle body panel structure (corresponding to a cross section taken along the line AA in FIG. 1), and (b) is a view from the upper surface side. FIG. 4C is a perspective view of the vibration damping reinforcing material, and FIG. It is a figure explaining the sound absorption effect | action of the damping reinforcement in 4th Embodiment. FIG. 10 is a diagram showing a fifth embodiment of a vehicle body panel structure according to the present invention, in which (a) is a cross-sectional view of the vehicle body panel structure (corresponding to a cross section taken along line AA in FIG. 1), and (b) is a vibration damping. It is a perspective view of a reinforcing material. It is sectional drawing which shows 6th Embodiment of a vehicle body panel structure (equivalent to the AA line cross section of FIG. 1). It is sectional drawing which shows 7th Embodiment of the vehicle body panel structure based on this invention (equivalent to the AA line cross section of FIG. 1). It is sectional drawing which shows 8th Embodiment of the vehicle body panel structure based on this invention (equivalent to the AA line cross section of FIG. 1). 9 shows a ninth embodiment of a vehicle body panel structure according to the present invention, wherein (a) is a cross-sectional view of the vehicle body panel structure (corresponding to a cross section taken along line AA in FIG. 1), and (b) is a vibration damping reinforcing material. FIG. 10 shows a tenth embodiment of a vehicle body panel structure according to the present invention, wherein (a) is a cross-sectional view of the vehicle body panel structure (corresponding to a cross section taken along the line AA in FIG. 1), and (b) is a vibration damping reinforcing material. FIG. 11 shows an eleventh embodiment of a vehicle body panel structure according to the present invention, in which (a) is a cross-sectional view of the vehicle body panel structure (corresponding to a cross section taken along line AA in FIG. 1), and (b) is a vibration damping reinforcing material. FIG. 12 shows a twelfth embodiment of a vehicle body panel structure according to the present invention, in which (a) is a cross-sectional view of the vehicle body panel structure (corresponding to a cross section taken along line AA in FIG. 1), and (b) is a vibration damping reinforcing material. FIG.

  DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments for implementing a vehicle body panel structure according to the present invention (hereinafter referred to as “embodiments”) will be described with reference to the accompanying drawings. In the following description, the same components in each embodiment will be described with the same reference numerals.

(First embodiment)
FIG. 1 is a longitudinal sectional view schematically showing a main part of an automobile to which a first embodiment of a vehicle body panel structure according to the present invention is applied.

  The automobile 10 shown in FIG. 1 to which the vehicle body panel structure of the first embodiment is applied has a vehicle compartment 12 that surrounds a seat seat 11 on which an occupant sits. The ceiling of the compartment 12 is provided with a space between the outer panel (body panel) 13 and the outer panel 13, and the headlining 14 disposed below the outer panel 13 (the compartment 12 side). And a vibration damping reinforcement 15 disposed between the outer panel 13 and the head lining 14.

  The vibration-damping reinforcing material 15 has a substantially mat shape, and as shown in FIG. 1, for example, a portion requiring reinforcement so that the outer panel 13 does not get dented against snow or a load from above, It is disposed on the lower surface (back surface) of the outer panel 13 at a location where vibration or noise is a problem. Therefore, the mat shape of the vibration-damping reinforcing material 15 is formed so as to roughly match the shape of the outer panel 13.

  Further, the vibration damping reinforcement 15 is attached to the outer panel 13 through the fixing member 17 so that an air layer 16 is provided between the outer panel 13 and the outer panel 13 as shown in FIG. It is attached with a gap between them. As the fixing member 17, for example, a double-sided tape, a reactive adhesive, and a bolt / nut are used. 2 is an enlarged schematic sectional view of a portion corresponding to the line AA in FIG. 1, and the headlining 14 is omitted in FIG.

  More specifically, as shown in FIG. 2 and FIG. 3, the vibration-damping reinforcing material 15 is laminated and disposed on the base layer 15a and both the front and back surfaces of the base layer 15a and integrated with the base layer 15a. The formed skin layers 15b and 15c. The base material layer 15a uses a foamed body such as urethane having a sound absorbing characteristic (sound absorbing function) and a damping characteristic (damping function) or a porous body of a fibrous body, and has a thickness of about 7 mm.

  On the other hand, for the skin layers 15b and 15c, for example, a single material or a composite material such as paper, resin, or metal is used. In addition, the skin layers 15b and 15c may be affixed or coated with a film for the purpose of water repellency, scratch prevention, heat insulation, and the like. Further, among the skin layers 15b and 15c, the surface-side skin layer 15b disposed to face the outer panel 13 is provided with a plurality of circular holes 18 penetrating therethrough. Thus, the base material layer 15a communicates with the outside (sound source side) to form a Helmholtz resonator structure in which the vibration damping reinforcement 15 absorbs sound. Here, the holes 18 are provided so that the hole diameter is about 1 mm, the intervals are equal pitches, and the number is about 0.09% with respect to the area of the skin layer 15b. If the hole diameter and pitch of the holes 18 are changed, it is possible to tune so as to absorb the frequency range of the panel transmitted sound which is a problem.

  In addition, the hole 18 is preferably circular as shown in FIG. 3 for ease of drilling, but there is no particular limitation as long as it is a through-hole, and it may be, for example, a square. Further, the fixing member 17 is provided at a position where it does not overlap the hole 18 so as not to block the hole 18.

  FIG. 4 schematically shows a Helmholtz resonator structure in the vehicle body panel structure of the first embodiment. The sound absorption principle of the vehicle body panel structure in this embodiment is the same as that of the Helmholtz resonator, and is due to the action of the air mass Am of the hole 18 formed in the skin layer 15b and the air spring As formed in the base material layer 15a. Sound energy is converted into heat energy to absorb sound.

  In the case where the base material layer 15a is a porous body as in the vehicle body panel structure of the first embodiment, the thickness of the skin layer 15b is t and the air layer behind the hole 18 is as shown in FIG. When the thickness is L, the diameter of the hole 18 is d, the aperture ratio of the hole 18 is P, and the speed of sound is c, the resonance frequency f of the vibration damping reinforcement 15 can be obtained from the following equation (A).

  Moreover, in the vehicle body panel structure in the first embodiment, by providing the air layer 16 between the outer panel 13 and the vibration damping reinforcing material 15, the air mass Am of the hole 18 is easily shaken, and the sound absorbing effect is increased. The sound absorption principle of the Helmholtz resonator structure is the same in the second and second embodiments described below, in which a porous body is used for the base material layer 15a.

  FIG. 5 is a characteristic diagram of the frequency of 1/3 octave band and the amount of noise showing an example of a verification result obtained by an actual vehicle experiment on the sound absorption effect. In FIG. 5, the sound absorption characteristic in the vehicle body panel structure (I) according to the present invention in which the vibration damping reinforcing material 15 in the first embodiment in which the hole 18 is provided in the skin layer 15b is provided, and the hole 18 is provided in the skin layer 15b. The sound absorption characteristics in the conventional vehicle body panel structure (II) provided with no vibration damping reinforcement and the sound absorption characteristics in the conventional vehicle body panel structure (III) in which only the roof bow is set on the ceiling are shown. 3 octave band center frequency [Hz], the vertical axis represents the noise level (SPL [dB (A)]). The lower the noise level (SPL) on the vertical axis, the better. Further, in this actual vehicle experiment, the target is to reduce noise when the center frequency of the 1/3 octave band is 1600 Hz to 2000 Hz. The thickness t of the skin layer 15b in the vibration damping reinforcement 15 is 0.28 mm, The diameter d is 1 mm, the thickness L of the base material layer 15a is 7 mm, and the aperture ratio of the holes 18 is 0.09%.

  In FIG. 5, when the 1/3 octave band center frequency is 2000 Hz, among the vehicle body panel structures (I), (II), and (III), the amount of noise reduction is the vehicle body panel structure (I), (II), It can be seen that it can be reduced in the order of (III). In the case of the vehicle body panel structure (I) using the vibration-damping reinforcing material 15 in the present embodiment in which the hole 18 is provided in the skin layer 15b, the vehicle body panel structure (II) in which the hole 18 is not provided in the skin layer 15b. It can be seen that 3 dB can be reduced compared to. This verification result is the same for the second to twelfth embodiments described below.

  Therefore, in the vehicle body panel structure according to the first embodiment configured as described above, the vibration of the outer panel 13 can be suppressed by using the vibration-damping reinforcing material 15 provided with the holes 18 in the skin layer 15b. Further, since the sound that has permeated from the outer panel 13 is absorbed by the Helmholtz resonator structure, the interior noise can be greatly reduced and a quiet interior space can be realized. Thereby, it is excellent in high soundproofing performance and vibration control performance, and it is possible to remove the sound absorbing material set in the head lining 14, thereby enabling cost and weight reduction.

(Second embodiment)
FIG. 6 shows a second embodiment of a vehicle body panel structure according to the present invention, in which (a) is a cross-sectional view of the vehicle body panel structure (corresponding to a cross section taken along line AA of FIG. 1), and (b). FIG. 3 is a plan view of the vibration damping reinforcement 15 (viewed from the vehicle interior side). Note that the head lining 14 is omitted in the sectional view of FIG.

  In the vehicle body panel structure of the second embodiment shown in FIG. 6, the vibration damping reinforcement 15 has a sound absorbing characteristic and a vibration damping characteristic, such as urethane foam or fiber, like the vehicle body panel structure of the first embodiment. The base material layer 15a is made of a porous body, and the skin layers 15b and 15c are laminated on the front and back surfaces of the base material layer 15a and integrated with the base material layer 15a. A plurality of through holes 18 are provided at a required hole diameter and pitch in the skin layer 15c laminated on the surface of the base material layer 15a facing the vehicle interior side, that is, the surface facing the headlining 14. Thus, a Helmholtz resonator structure is formed. The vibration damping and sound absorption principles are the same as those in the first embodiment, and the vibration of the outer panel 13 is suppressed and the sound that has penetrated from the outer panel 13 is absorbed to reduce the room noise.

(Third embodiment)
FIG. 7 shows a third embodiment of a vehicle body panel structure according to the present invention, in which (a) is a sectional view of the vehicle body panel structure (corresponding to a cross section taken along line AA in FIG. 1), and (b). FIG. 3 is a plan view of the vibration damping reinforcement 15 (viewed from the vehicle interior side). It should be noted that the head lining 14 is omitted in the sectional view of FIG.

  In the vehicle body panel structure shown in FIG. 7, the vibration-damping reinforcement 15 has a sound absorbing characteristic and a vibration-damping characteristic, as in the vehicle body panel structure of the first embodiment. And the skin layers 15b and 15c that are laminated on the front and back surfaces of the base material layer 15a and integrated with the base material layer 15a. Then, a plurality of through-holes 18 are provided in both the skin layers 15b and 15c, which are respectively laminated on the front and back surfaces of the base material layer 15a, with a required hole diameter and pitch to form a Helmholtz resonator structure. It is set as the structure which becomes. The vibration control and sound absorption principles are the same as those in the first and second embodiments, and the vibration of the outer panel 13 is suppressed and the sound that has penetrated from the outer panel 13 is absorbed to reduce the room noise. .

(Fourth embodiment)
FIG. 8 shows a fourth embodiment of a vehicle body panel structure according to the present invention, in which (a) is a sectional view of the vehicle body panel structure (corresponding to a cross section taken along line AA in FIG. 1), and (c). FIG. 3 is a plan view of the vibration damping reinforcement 15 (viewed from the vehicle interior side). Note that the head lining 14 is omitted in the sectional view of FIG.

  The vehicle body panel structure shown in FIG. 8 includes a base material layer 25 having a sound absorption characteristic and a vibration control characteristic, and a base material layer 25 that is laminated on both the front and back surfaces of the base material layer 25. It is composed of integrated skin layers 15b and 15c.

  The base material layer 25 is made of, for example, a sheet material made of a single material or a composite material such as paper, resin, metal, or the like, formed into a corrugated shape in which the cross-sectional shape is a undulating waveform, and is formed into a plate shape It is arranged. On the front and back both sides of the base material layer 25, that is, the mat-shaped partition body 26, the skin layers 15 b and 15 c are laminated and arranged in contact with the ridge line 27 portions of the partition body 26, respectively. The inside is divided into a plurality of rooms by the partition wall 26. In addition, the skin layer 15b disposed to face the outer panel 13 is provided with a plurality of holes 18 penetrating corresponding to the recessed portions between the ridge lines 27 and 27 of the partition wall body 26, that is, the recesses. In addition, each room of the base material layer 25 communicates with the outside through the hole 18, and the vibration-damping reinforcing material 15 forms a Helmholtz resonator structure.

  FIG. 9 shows a Helmholtz resonator structure of a vehicle body panel structure in the fourth embodiment. The sound absorption principle of the vehicle body panel structure in this embodiment is the same as that of the Helmholtz resonator, and sound is generated by the action of the air mass Am of the hole 18 formed in the skin layer 15b and the air spring As formed in the base material layer 25. It converts energy into heat energy and absorbs sound.

  When the base material layer 25 is partitioned into a plurality of rooms by the partition body 26 as in the vehicle body panel structure in the fourth embodiment, the thickness of the skin layer 15b is t, and the thickness of the air layer behind the hole 18 is When L, the diameter of the hole 18 is d, the aperture ratio of the hole 18 is P, the volume of each room (space) is V, and the sound velocity is c, the resonance frequency f of the vibration damping reinforcement 15 is the following (B) It is obtained from the formula.

  Moreover, also in the vehicle body panel structure in the fourth embodiment, the air mass Am of the hole 18 is easily shaken by providing the air layer 16 between the outer panel 13 and the vibration damping reinforcing material 15, and the sound absorbing effect is increased. The sound absorption principle of the Helmholtz resonator structure is the same in the fifth to twelfth embodiments described below, in which a partition wall (or partition wall) is used for the base material layer 25.

  Therefore, in the vehicle body panel structure configured as in the fourth embodiment, the vibration of the outer panel 13 is suppressed by using the vibration-damping reinforcing material 15 having the holes 18 in the skin layer 15b, and the outer panel 13 described above. The sound that has permeated from the room is absorbed by the Helmholtz resonator structure, so that room noise can be greatly reduced. Thereby, the sound absorbing material set in the headlining 14 can be removed, and cost and weight can be reduced.

(Fifth embodiment)
FIG. 10 shows a fifth embodiment of a vehicle body panel structure according to the present invention, wherein (a) is a sectional view of the vehicle body panel structure (corresponding to a cross section taken along line AA in FIG. 1), and (b). FIG. 3 is a perspective view of the vibration damping reinforcement member 15. Note that the head lining 14 is omitted in the sectional view of FIG.

  The vehicle body panel structure of the fifth embodiment shown in FIG. 10 uses a partition body 26 in which the vibration-damping reinforcing material 15 has a waveform in which the cross-sectional shape repeats unevenness, similar to the vehicle body panel structure of the fourth embodiment. It is. The partition body 26 has an upper partition body 26b as an upper layer disposed on the upper surface side of the intermediate layer 26a with an intermediate layer 26a interposed therebetween, and an upper partition body 26b as a lower layer is fixedly disposed on the lower surface side. Thus, the intermediate layer 26a, the upper partition body 26b, and the lower partition body 26c are integrated.

  The intermediate layer 26a is made into a sheet shape from a single material or a composite material such as paper, resin, metal or the like.

  On the other hand, the upper partition wall body 26b and the upper partition wall body 26b are each formed in a mat shape by forming a sheet material made of a single material or a composite material such as paper, resin, metal, or the like into a waveform in which the cross-sectional shape repeats unevenness. Thus, the ridge line 27 is abutted and fixed to the intermediate layer 26a and laminated in a flat plate shape. In addition, the unevenness pitch and height of the upper partition body 26b and the lower partition body 26c are different, and the unevenness pitch and height of the upper partition body 26b are approximately twice the unevenness pitch of the lower partition body 26c. Yes. The uneven pitch and height may be the same for the upper partition body 26b and the lower partition body 26c, and are arbitrary.

  Then, the skin layers 15b and 15c are respectively laminated on the front and back surfaces of the vibration damping reinforcement member 15, and the vibration damping reinforcement member 15 includes a plurality of upper partition walls 26b, lower partition walls 26c, and intermediate layers 26a. It is in a state of being divided into rooms. In addition, a plurality of holes 18 penetrating corresponding to the recessed portions (concave portions) between the ridge lines 27 and 27 of the upper partition wall body 26b are formed in the skin layer 15b disposed to face the outer panel 13. Each of the chambers of the upper partition wall body 26b communicates with the outside through the hole 18, and the vibration-damping reinforcing material 15 forms a Helmholtz resonator structure.

  Accordingly, even in the vehicle body panel structure configured as in the fifth embodiment, the vibration of the outer panel 13 is suppressed by using the vibration-damping reinforcing material 15 having the holes 18 in the skin layer 15b, and the fourth embodiment. The sound that has penetrated from the outer panel 13 is absorbed by the same sound absorption principle of the Helmholtz resonator structure as described in the above, so that the room noise can be greatly reduced.

(Sixth embodiment)
FIG. 11 shows a sixth embodiment of a vehicle body panel structure according to the present invention, and is a cross-sectional view of the vehicle body panel structure (corresponding to a cross section taken along line AA in FIG. 1). Note that the headlining 14 is omitted in the cross-sectional view of FIG.

  The vehicle body panel structure of the sixth embodiment shown in FIG. 11 has the same structure of the base material layer 25 in the vibration-damping reinforcing material 15 shown in FIG. In the case of the structure of the fifth embodiment, a plurality of through holes 18 are provided in the skin layer 15b, whereas in the vehicle body panel structure of the sixth embodiment, a plurality of through holes 18 are provided. Is provided on the side of the skin layer 15c facing the head lining 14 and between the ridges 27, 27 of the lower partition wall 26c. Therefore, the chambers of the lower partition wall body 26c communicate with the outside through the holes 18, and the vibration-damping reinforcing material 15 forms a Helmholtz resonator structure.

  Therefore, even in the vehicle body panel structure configured as in the sixth embodiment, the vibration of the outer panel 13 is suppressed by using the vibration-damping reinforcing material 15 having the holes 18 in the skin layer 15b, and the fourth embodiment. The sound that has penetrated from the outer panel 13 is absorbed by the same sound absorption principle of the Helmholtz resonator structure as described in the above, so that the room noise can be greatly reduced.

(Seventh embodiment)
FIG. 12 shows a seventh embodiment of a vehicle body panel structure according to the present invention, and is a cross-sectional view of the vehicle body panel structure (corresponding to a cross section taken along line AA in FIG. 1). In the cross-sectional view of FIG. 12, the headlining 14 is omitted.

  The vehicle body panel structure of the seventh embodiment shown in FIG. 12 has the same structure of the base material layer 25 in the vibration-damping reinforcing material 15 shown in FIG. In the fifth embodiment, the plurality of through holes 18 are provided only on the skin layer 15b side, whereas in the structure of the seventh embodiment, the skin layer facing the head lining 14 is provided. A plurality of holes 18 penetrating also on the 15c side are provided between the ridge lines 27, 27 of the lower partition wall 26c. Therefore, the chambers of the upper partition wall body 26b and the lower partition wall body 26c communicate with the outside through the holes 18, and the vibration-damping reinforcing material 15 forms a Helmholtz resonator structure.

  Therefore, in the vehicle body panel structure configured as in the seventh embodiment, the vibration of the outer panel 13 is suppressed by using the vibration-damping reinforcing material 15 having the holes 18 in the skin layer 15c, and the fourth embodiment. The sound that has penetrated from the outer panel 13 is absorbed by the same sound absorption principle of the Helmholtz resonator structure as described in the above, so that the room noise can be greatly reduced.

  FIG. 13 shows an eighth embodiment of a vehicle body panel structure according to the present invention, and is a cross-sectional view of the vehicle body panel structure (corresponding to a cross section taken along line AA in FIG. 1). Note that the headlining 14 is omitted in the cross-sectional view of FIG.

  The vehicle body panel structure of the eighth embodiment shown in FIG. 13 has the same structure of the base material layer 25 in the vibration-damping reinforcing material 15 shown in FIG. In the case of the eighth embodiment, a plurality of penetrating holes 18 are provided in the intermediate layer 26a, and each chamber on the side of the upper partition body 26b and the lower partition body 26c are connected through the holes 18 provided in the intermediate layer 26a. The vibration-reinforcing reinforcing material 15 forms a Helmholtz resonator structure in communication with each room.

  Accordingly, even in the vehicle body panel structure configured as in the eighth embodiment, the vibration of the outer panel 13 is suppressed by using the vibration-damping reinforcement 15 having the hole 18 in the intermediate layer 26a, and the fourth embodiment. The sound that has penetrated from the outer panel 13 is absorbed by the same sound absorption principle of the Helmholtz resonator structure as described in the above, so that the room noise can be greatly reduced.

  FIG. 14 shows a ninth embodiment of a vehicle body panel structure according to the present invention, in which (a) is a sectional view of the vehicle body panel structure (corresponding to a cross section taken along line AA in FIG. 1), and (b). FIG. 3 is a plan view of the vibration damping reinforcement 15. Note that the head lining 14 is omitted in the sectional view of FIG.

  The vehicle body panel structure of the ninth embodiment shown in FIG. 14 has a plurality of surfaces extending in both front and back directions, with the space between the skin layer 15b and the skin layer 15c being spanned between the skin layer 15b and the skin layer 15c. The base layer 25 has a structure in which a plurality of chambers having a vertical stripe shape in a plan view are provided in the space. In addition, a plurality of holes 18 penetrating the respective rooms are provided in the surface-side skin layer 15b disposed to face the outer panel 13, and the rooms are communicated with the outside through the holes 18. Thus, the vibration-damping reinforcement 15 forms a Helmholtz resonator structure.

  Accordingly, even in the vehicle body panel structure configured as in the ninth embodiment, the vibration of the outer panel 13 is suppressed by using the vibration-damping reinforcing material 15 having the holes 18 in the skin layer 15b, and the fourth embodiment. The sound that has penetrated from the outer panel 13 is absorbed by the same sound absorption principle of the Helmholtz resonator structure as described in the above, so that the room noise can be greatly reduced.

  FIG. 15 shows a vehicle body panel structure according to a tenth embodiment of the present invention. FIG. 15 (a) is a cross-sectional view of the vehicle body panel structure (corresponding to a cross section taken along line AA in FIG. 1). FIG. 3 is a plan view of the vibration damping reinforcement 15. Note that the head lining 14 is omitted in the sectional view of FIG.

  The vehicle body panel structure of the tenth embodiment shown in FIG. 15 has a plurality of surfaces extending in both front and back directions, with the space between the skin layer 15b and the skin layer 15c being spanned between the skin layer 15b and the skin layer 15c. The partition wall 28 is divided into a honeycomb shape in plan view, and a base material layer 25 is formed in which a plurality of chambers having a honeycomb shape are provided in the space. In addition, a plurality of holes 18 penetrating the respective rooms are provided in the surface-side skin layer 15b disposed to face the outer panel 13, and the rooms are communicated with the outside through the holes 18. Thus, the vibration-damping reinforcement 15 forms a Helmholtz resonator structure.

  Accordingly, even in the vehicle body panel structure configured as in the tenth embodiment, the vibration of the outer panel 13 is suppressed by using the vibration-damping reinforcement material 15 having the holes 18 in the skin layer 15b, and the fourth embodiment. The sound that has penetrated from the outer panel 13 is absorbed by the same sound absorption principle of the Helmholtz resonator structure as described in the above, so that the room noise can be greatly reduced.

  FIG. 16 shows an eleventh embodiment of a vehicle body panel structure according to the present invention. FIG. 16A is a cross-sectional view of the vehicle body panel structure (corresponding to a cross section taken along line AA in FIG. 1), and FIG. FIG. 3 is a plan view of the vibration damping reinforcement 15. Note that the head lining 14 is omitted in the sectional view of FIG.

  The vehicle body panel structure of the eleventh embodiment shown in FIG. 16 has a plurality of surfaces extending in both front and back directions, with the space between the skin layer 15b and the skin layer 15c being spanned between the skin layer 15b and the skin layer 15c. The partition walls 28 are arranged in a lattice shape in plan view, and a structure of the base material layer 25 is provided in which a plurality of rooms are provided in the space. In addition, a plurality of holes 18 penetrating the respective rooms are provided in the surface-side skin layer 15b disposed to face the outer panel 13, and the rooms are communicated with the outside through the holes 18. Thus, the vibration-damping reinforcement 15 forms a Helmholtz resonator structure.

  Therefore, even in the vehicle body panel structure configured as in the eleventh embodiment, the vibration of the outer panel 13 is suppressed by using the vibration-damping reinforcing material 15 having the holes 18 in the skin layer 15b, and the fourth embodiment. The sound that has penetrated from the outer panel 13 is absorbed by the same sound absorption principle of the Helmholtz resonator structure as described in the above, so that the room noise can be greatly reduced.

  FIG. 17 shows a twelfth embodiment of a vehicle body panel structure according to the present invention, wherein (a) is a sectional view of the vehicle body panel structure (corresponding to a cross section taken along line AA in FIG. 1), and (b). FIG. 3 is a perspective view of the vibration damping reinforcement member 15. Note that the head lining 14 is omitted in the sectional view of FIG.

  The vehicle body panel structure of the twelfth embodiment shown in FIG. 17 has a plurality of surfaces extending in both front and back directions, with the space between the skin layer 15b and the skin layer 15c being spanned between the skin layer 15b and the skin layer 15c. The partition wall 28 formed in the shape of a circular cylinder is arranged at substantially equal intervals, and a structure of the base material layer 25 is provided in which a plurality of cylindrical chambers are provided in the space. In addition, a plurality of holes 18 penetrating the respective rooms are provided in the surface-side skin layer 15b disposed to face the outer panel 13, and the rooms communicate with the outside through the holes 18. Thus, the vibration damping reinforcement 15 forms a Helmholtz resonator structure.

  Accordingly, even in the vehicle body panel structure configured as in the twelfth embodiment, the vibration of the outer panel 13 is suppressed by using the vibration-damping reinforcing material 15 having the holes 18 in the skin layer 15b, and the fourth embodiment. The sound that has penetrated from the outer panel 13 is absorbed by the same sound absorption principle of the Helmholtz resonator structure as described in the above, so that the room noise can be greatly reduced.

  The present invention is not limited to the above-described embodiment, and modifications, improvements, and the like within the scope that can achieve the object of the present invention are included in the present invention.

10 automobile 11 seat seat 12 compartment 13 outer panel (body panel)
14 Headlining 15 Damping reinforcement 15a Base material layer 15b Skin layer (surface side)
15c skin layer (back side)
16 air layer 17 fixing member 18 hole 25 base material layer 26 partition wall 26a intermediate layer 26b upper partition wall 26c lower partition wall 27 ridge line 28 partition wall Am air mass As air spring t skin layer thickness L air layer thickness d hole Diameter f resonance frequency

Claims (11)

An outer panel,
A fixing member disposed on the back surface of the outer panel;
A base material layer having a vibration damping and sound absorbing function, a pair of skin layers respectively laminated on the front and back surfaces of the base material layer, and a plurality of through holes provided in the skin layer with a required hole diameter and pitch A damping reinforcing material attached to the back surface of the outer panel via the fixing member,
The vehicle body panel structure characterized by having.   The said several hole is provided in at least one skin layer among the pair of skin layers each laminated and arrange | positioned at the front-and-back both surface side of the said base material layer, The Claim 1 characterized by the above-mentioned. Body panel structure.   The vehicle body panel structure according to claim 1 or 2, wherein the skin layer is formed of a single material or a composite material.   The vehicle body panel structure according to any one of claims 1 to 3, wherein the base material layer is formed of a corrugated partition body having a cross-sectional shape in which unevenness is repeated.   The base material layer includes an upper layer and a lower layer provided with the corrugated partition walls, and a sheet-like intermediate layer disposed between the upper layer and the lower layer. The vehicle body panel structure according to claim 4.   The vehicle body panel structure according to claim 5, wherein the pitch of the unevenness of the upper layer is different from the pitch of the unevenness of the lower layer.   The body panel structure according to any one of claims 4 to 6, wherein the hole of the skin layer is formed corresponding to a recess of the partition body.   The vehicle body panel structure according to any one of claims 1 to 3, wherein the base material layer has a plurality of partition walls extending in the front and back double-side directions in a vertical stripe shape in plan view.   The vehicle body panel structure according to claim 8, wherein the partition walls are arranged in a honeycomb shape in plan view.   The vehicle body panel structure according to claim 8, wherein the partition walls are arranged in a lattice shape in a plan view.   The vehicle body panel structure according to claim 8, wherein the partition wall is formed in a circular cylindrical shape.

Images