JP6597692B2 - Vehicle panel structure and manufacturing method thereof - Google Patents

Description

  The present invention relates to a vehicle panel structure and a manufacturing method thereof, and more particularly to a vehicle panel structure in which a viscoelastic body is sandwiched in a space formed between a first base panel and a second base panel and a manufacturing method thereof. .

Conventionally, a panel structure constituting a wide panel member of a vehicle body such as a roof panel or a floor panel spanned between vehicle body frames has been used.
Panel members such as roof panels and floor panels are subject to vibration in a low frequency band (for example, 20 to 50 Hz) in a direction parallel to the panel surface due to vehicle body deformation caused by vibration transmitted from the road surface when the vehicle is traveling. The vibration propagates and hinders the passenger comfort of the occupant, so-called riding comfort of the vehicle.
By increasing the rigidity of the panel member, the vibration generated in the panel member can be attenuated, and the riding comfort of the vehicle can be improved.
However, an increase in the rigidity of the surface member may cause an increase in vehicle body weight and an increase in production cost.

It is known that viscoelastic bodies such as rubber have vibration damping performance as their physical properties because they exhibit behavior such as creep deformation and stress relaxation phenomenon.
Creep deformation is viscoelastic deformation for a constant force, and stress relaxation phenomenon is a phenomenon that attempts to return to an equilibrium state when it deviates from a mechanical equilibrium state by a predetermined factor.
When the viscoelastic body is stretched with vibration, the entropy of the viscoelastic body decreases, so that the viscoelastic body changes in the contraction direction to increase the reduced entropy.
The amount of heat corresponding to the amount of entropy reduction due to this extension is released to the outside, and as a result, the viscoelastic body moves back to the initial state.
Based on the above, various proposals using the characteristics of this viscoelastic body have been made for the purpose of improving the vibration damping performance while avoiding an increase in the weight of the vehicle body.

The carbon fiber reinforced plastic molded body of Patent Document 1 is separated in the plane parallel direction between the first CFRP (Carbon Fiber Reinforced Plastics) layer, the second CFRP layer, and the first and second CFRP layers, and is also viscous. A pair of damping elastic layers made of an elastic body and a high-rigidity resin region sandwiched between the pair of damping elastic layers between the first and second CFRP layers.
Damping performance is secured by the damping elastic layer, and bending rigidity in the longitudinal direction of the first and second CFRP layers is secured by the high-rigidity resin region.

JP 2011-183562 A

The carbon fiber reinforced plastic molded body of Patent Document 1 converts part of vibration energy into thermal energy by deforming a viscoelastic body (damping elastic layer) following the vibration of the base panel (CFRP layer). The vibration control performance is improved by reducing the vibration energy of the base panel.
Here, in order to further improve the merchantability, it is conceivable to sandwich a foam such as urethane between the base panel and the viscoelastic body. By adopting such a configuration, it is possible to expect an improvement in sound insulation in addition to weight reduction and vibration damping.
However, as a result of the study by the present inventors, the panel structure in which the foam is sandwiched between the base panel and the viscoelastic body ensures the expected vibration damping performance despite the high expected effect. It turns out that there is a risk of not being able to.

That is, when the viscoelastic body is bonded to the base panel, a bonding force consisting of a combined force of the adhesive force and the frictional force acts on the friction interface that is a boundary surface between the base panel and the viscoelastic body.
Since the foam is coarser than the base panel, it is considered that a high frictional force naturally acts on the friction interface between the foam and the viscoelastic body. Is expected to be transmitted at a high transmission rate.
However, when the viscoelastic body is bonded to the foam by an adhesive action or the like, the foam has a higher viscoelasticity tendency than the base panel, so the friction interface between the foam and the viscoelastic body is the base panel and the viscoelastic body. It was found that the viscoelastic property is higher than that of the friction interface.
Therefore, due to creep deformation by the viscoelastic body, a decrease in frictional force between the two occurs, and the viscoelastic body faces the foam due to interfacial delamination accompanying a decrease in the bonding force between the foam and the viscoelastic body. As a result, it was found that the base panel vibration was not sufficiently transmitted to the viscoelastic body.

  An object of the present invention is to provide a vehicle panel structure capable of improving vibration damping performance while reducing weight and a manufacturing method thereof.

The vehicle panel structure according to claim 1 is a vehicle panel structure in which a viscoelastic body is sandwiched in a space formed between a first base panel and a second base panel. A first panel body made of a synthetic resin-made first filler bonded to the space-side inner surface of one base panel; the second base panel; and the space-side inner surface of the second base panel; and a second panel member made of a synthetic resin of the second filler, in sandwiched by being adhered to the inner surface of each Rutotomoni state are separated from each other between the first panel member and the second panel member When a plurality of viscoelastic bodies and relative movement in the plane parallel direction between the viscoelastic body and the first and second fillers occur due to vibrations of the first and second panel bodies, Relative transfer of the viscoelastic body and the first and second fillers in the plane parallel direction The a conversion mechanism for converting the plane orthogonal direction force acting on the visco-elastic body, opposite said conversion mechanism, the first, vertically symmetrically spaced state with are respectively formed on the inner surface of the second filler It has a pair of convex portions arranged, and the pair of convex portions is configured to be in contact with a side portion of the viscoelastic body .

In this vehicle panel structure, a first panel body comprising the first base panel and a first filler made of synthetic resin bonded to the inner surface of the first base panel on the space side, and the second base panel And a second panel body made of synthetic resin and a second filler bonded to the space-side inner surface of the second base panel, and sandwiched between the first panel body and the second panel body because having a plurality arranged viscoelastic body is glued to the inner surface of each Rutotomoni state are separated from each other by, weight of the vehicle weight, it is possible to improve the vibration damping performance and sound insulation performance in a low frequency band it can.
When relative movement in the plane parallel direction of the viscoelastic body and the first and second fillers occurs due to the vibration of the first and second panel bodies, the viscoelastic body and the first and first panels A conversion mechanism that converts relative movement in the plane parallel direction with the two fillers into a surface orthogonal direction drag acting on the viscoelastic body, and the conversion mechanisms are formed on the inner surfaces of the first and second fillers, respectively. And a pair of convex portions arranged symmetrically opposite to each other in a separated state, and the pair of convex portions is configured to be in contact with a side portion of the viscoelastic body. Therefore, it is possible to increase the friction force between the viscoelastic body and the first and second fillers by using the initial relative movement by the viscoelastic body to increase the orthogonal force in the plane orthogonal direction.
Since the relative movement of the viscoelastic body with respect to the first and second fillers in the plane parallel direction can be suppressed, the vibrations of the first and second base panels are transmitted to the viscoelastic body with a high transmission rate. The vibration damping performance can be improved.

A second aspect of the invention is characterized in that, in the first aspect of the invention, the conversion mechanism includes a protruding portion formed in the vicinity of the inner surface of each of the first and second fillers.
According to this structure, the relative movement of the viscoelastic body with respect to the first and second fillers in the plane parallel direction can be reliably suppressed.

The invention of claim 3 is characterized in that, in the invention of claim 1 or 2 , a plurality of the viscoelastic bodies are provided on both sides of the center line of the vehicle body in a separated state.
According to this configuration, it is possible to further reduce the weight and cost of the vehicle body.

According to a fourth aspect of the present invention, in the third aspect of the invention, the conversion mechanism is at least a portion near the inner surface of each of the first and second fillers so as to extend along the centerline side end of the viscoelastic body. It is characterized by being formed.
According to this configuration, the configuration of the conversion mechanism can be further simplified.

The invention of claim 5 is the invention of any one of claims 1 to 4 , wherein the first and second base panels are made of a fiber reinforced resin material, and the first and second fillers are made of foam. It is characterized by becoming.
According to this configuration, it is possible to further reduce the weight of the vehicle body and improve the sound insulation performance.

According to a sixth aspect of the present invention, there is provided a method for manufacturing a vehicle panel structure in which a viscoelastic body is sandwiched in a space formed between a first base panel and a second base panel. A first panel body made of a synthetic resin-made first filler bonded to the space-side inner surface of one base panel; the second base panel; and the space-side inner surface of the second base panel; A second panel body made of the second synthetic resin filler, a viscoelastic body, and a pair of convex portions formed in the vicinity of the inner surfaces of the first and second fillers are prepared. The preparation step, the corners of the viscoelastic body and the corners of the protrusions formed on the second filler are in close contact, and the side edges of the viscoelastic body and the protrusions formed on the second filler arranging step side surface portion of the part is positioning the viscoelastic body relative to the second filling material to abut , The side surface of the convex portion and the corner portion and the corner portion of the convex portion formed on the first filling material is formed on the first filler and the side portions of the coherent and the viscoelastic body of the viscoelastic body The viscoelastic body disposed on the second filler so that the portions abut and a pair of convex portions formed in the vicinity of the inner surfaces of the first and second fillers face each other in a separated state It is characterized by having a intermediate generation step is brought into contact with the first panel member to produce an intermediate body, and a pressing step you heat formed shape by the mold for molding the intermediate to a predetermined shape Yes.

In this vehicle panel structure manufacturing method, the corners of the viscoelastic body and the corners of the convex portions formed on the second filler are in close contact, and the side edges of the viscoelastic body and the second filling are formed. An arrangement step of arranging the viscoelastic body with respect to the second filler so that a side surface portion of a convex portion formed on the material abuts, and a corner portion of the viscoelastic body and the first filler are formed. And the side portions of the viscoelastic body are in contact with the side portions of the convex portions formed on the first filler and the inner surfaces of the first and second fillers, respectively. An intermediate body that generates an intermediate body by bringing the first panel body into contact with the viscoelastic body disposed in the second filler so that a pair of convex portions formed in the vicinity face each other in a separated state In the pressing process, heat forming and adhesion of the viscoelastic body and the first and second fillers are simultaneously performed in the pressing process. It can be.
The order having a pressing process you heat formed shape by the mold for molding the intermediate to a predetermined shape, to increase the surface direction perpendicular drag by using the relative movement early by viscoelastic, viscoelastic body and the The panel structure for vehicles which can increase the frictional force between the 1st and 2nd filler can be manufactured.

According to a seventh aspect of the invention, in the sixth aspect of the invention, the first and second base panels are made of a thermoplastic synthetic resin material.
According to this configuration, high-precision heat forming can be performed in the pressing step.

  According to the vehicle panel structure and the manufacturing method thereof of the present invention, the vibration damping performance can be improved while reducing the weight by increasing the surface orthogonal direction drag between the filler and the viscoelastic body.

It is the perspective view which looked at the vehicle in which the panel structure for vehicles concerning Example 1 was built from the upper left. It is a top view of a roof panel. It is the III-III sectional view taken on the line of FIG. It is the IV-IV sectional view taken on the line of FIG. It is a principal part enlarged view when the relative movement with respect to the filler by a viscoelastic body arises. It is a principal part enlarged view when the relative movement with respect to the filler by a viscoelastic body arises. It is explanatory drawing of the manufacturing process of the panel structure for vehicles. FIG. 6 is a diagram corresponding to FIG. 4 according to the second embodiment. FIG. 4 is a diagram corresponding to FIG. 4 according to the third embodiment. FIG. 6 is a view corresponding to FIG. 4 according to the fourth embodiment.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
The following description exemplifies a case where the present invention is applied to a vehicle roof panel, and does not limit the present invention, its application, or its use.
In the figure, the direction of arrow F is the front, the direction of arrow L is the left, and the direction of arrow U is the top.

Embodiment 1 of the present invention will be described below with reference to FIGS.
As shown in FIG. 1, the vehicle 1 is provided with a pair of left and right front pillars 2 extending from the front lower part on the left and right sides toward the rear upper part, and the lower part of the pair of front pillars 2 extends vertically. (Not shown) are connected to each other.
The roof side rails 3 extending rearward are connected to the upper ends of the pair of front pillars 2, respectively. A front header is installed between the front end portions of the pair of roof side rails 3, and a rear header (not shown) is installed between the rear end portions (both not shown).

  A region surrounded by the pair of roof side rails 3, the front header, and the rear header is covered with a roof panel 4 (vehicle panel structure) disposed so as to extend in the front-rear and left-right directions in the upper part of the vehicle body. The roof panel 4 is formed in a substantially rectangular shape in a plan view, and is formed in a gently curved shape in which a front portion and a rear portion are positioned below a middle portion in a side view (see FIG. 3).

Next, the roof panel 4 will be described.
As shown in FIGS. 1 to 4, the roof panel 4 includes a first panel body 10, a second panel body 20, and a viscoelasticity sandwiched between the first panel body 10 and the second panel body 20. It includes bodies 31 to 34, conversion mechanisms 41 to 44, and the like.

The first panel body 10 is formed by a first base panel 11 and a first filler 12 made of synthetic resin. The first base panel 11 is made of a carbon fiber reinforced resin (CFRP) in which carbon fibers arranged to extend in the front-rear direction and carbon fibers arranged to extend in the left-right direction are used as reinforcing materials. A thermoplastic synthetic resin material is used.
The first filler 12 is bonded to the lower surface (inner surface) of the first base panel 11 and is made of a material having a lower rigidity than the first base panel 11, for example, a foam such as polypropylene, polyurethane, polyethylene, or polyester. Yes.

As shown in FIGS. 3 and 4, the second panel body 20 is formed by a second base panel 21 and a second filler 22 made of synthetic resin, and forms a space between the first panel body 10. ing.
The second base panel 21 is disposed below the first base panel 11 so as to be separated by a predetermined distance in a substantially parallel shape, and is configured in the same manner as the first base panel 11.
The second filler 22 is bonded to the upper surface (inner surface) of the second base panel 21 and is configured in the same manner as the first filler 12. The upper surface of the second filler 22 is disposed so as to be separated from the lower surface of the first filler 12 by a predetermined distance.

As shown in FIGS. 1 and 2, the viscoelastic bodies 31 to 34 are formed in the same square shape in plan view, and are arranged so as to be separated from each other by a predetermined distance in the front-rear direction and the left-right direction.
These viscoelastic bodies 31 to 34 are made of, for example, a rubber material such as styrene-butadiene rubber, chloroprene rubber, butyl rubber, nitrile rubber, or ethylene propylene rubber.
Moreover, it may replace with the said rubber material and may use a polyester resin vinyl ester resin, a polyurethane resin, and another elastomer resin.
The viscoelastic bodies 31 to 34 are each formed in a panel shape so as to have substantially the same vertical width as the vertical width of the first and second fillers 12 and 22. The viscoelastic bodies 31 to 34 have an upper surface bonded to the lower surface (inner surface) of the first filler 12 and a lower surface bonded to the upper surface (inner surface) of the second filler 22.

The viscoelastic body 31 is installed in the left front region between the first panel body 10 and the second panel body 20. As shown in FIG. 2, the viscoelastic body 32 is installed so as to be symmetric with the viscoelastic body 31 with respect to the front-rear line X passing through the center of the vehicle width of the vehicle 1 and orthogonal to the vehicle width direction.
The viscoelastic bodies 33 and 34 are installed so as to be symmetrical with the viscoelastic bodies 32 and 31 with respect to the left and right lines Y orthogonal to the front and rear lines X at the center P of the roof panel 4.
In the viscoelastic bodies 31 to 34, regions where the strain energy share is high are formed along the front and rear lines X in the vicinity of the front and rear lines X in the viscoelastic body, and the distance from the front and rear lines X increases. The further away from the strain, the smaller the strain energy share.
The front / rear line X and the left / right line Y divide the roof panel 4 into four equal areas of front / rear and left / right in plan view.

Next, the conversion mechanisms 41 to 44 will be described.
When the viscoelastic bodies 31 to 34 move relative to the first and second fillers 12 and 22 when the roof panel 4 vibrates, the conversion mechanisms 41 to 44 are parallel to the roof panel 4 immediately before the movement. The parallel drag generating function that causes the surface parallel direction drag (hereinafter abbreviated as parallel drag) to act on the viscoelastic bodies 31 to 34 and the viscoelastic bodies 31 to 34 against the first and second fillers 12 and 22 are provided. When the relative movement is performed, a vertical force that causes a surface orthogonal direction drag (hereinafter abbreviated as a normal force) greater than the surface orthogonal direction drag orthogonal to the roof panel 4 before the movement to the viscoelastic bodies 31 to 34 in the initial stage of the movement. Each has a drag generation function.
The conversion mechanisms 41 and 42 are line symmetric with respect to the front and rear line X, the conversion mechanisms 41 and 44 are line symmetric with respect to the left and right line Y, and the conversion mechanisms 41 and 43 are formed to be point symmetric with respect to the center P of the roof panel 4. Therefore, hereinafter, the conversion mechanism 41 will be described as a representative.

As shown in FIG. 2, the conversion mechanism 41 has convex portions 12 a and 22 a formed on the ridge so as to be in contact with the entire right side of the viscoelastic body 31 and in contact with the entire rear side. It has.
The convex portions 12a and 22a are formed in a substantially L shape in a plan view and a rectangular shape in the vertical direction cross section.
As shown in FIGS. 3 and 4, the convex portion 12 a is formed so as to protrude downward from the lower surface, which is a reference surface corresponding to the most area of the first filler 12, and the amount of protrusion from the lower surface is viscoelastic. The vertical dimension (thickness) of the body 31 is set to 1/3 or less. In the present embodiment, the protruding amount of the convex portion 12 a is set to approximately ¼ of the vertical dimension of the viscoelastic body 31. Usually, the upper surface of the viscoelastic body 31 is in surface contact with the lower surface of the first filler 12, and the upper portion of the right surface is in surface contact with the left wall portion of the convex portion 12a.

As shown in FIG. 5, a normal force F1 that is a normal force in the direction perpendicular to the surface acts on the friction interface formed by the lower surface of the first filler 12 and the upper surface of the viscoelastic body 31. The frictional force calculated | required from the product with a friction coefficient has arisen.
When the viscoelastic body 31 moves relatively to the convex portion 12a with respect to the first filler 12 due to the vibration of the roof panel 4, immediately before the viscoelastic body 31 moves, the viscoelastic body 31 is moved from the left side of the convex portion 12a. A parallel drag F <b> 2 acting in the direction opposite to the moving direction of the viscoelastic body 31 acts on the right wall portion. Due to this parallel drag generation function, in addition to the preexisting frictional force, a parallel drag F2 is applied from the left side surface of the convex portion 12a to the right side wall portion of the viscoelastic body 31 in the direction opposite to the moving direction. The relative movement of the viscoelastic body 31 with respect to the 1 filler 12 is suppressed.

As shown in FIG. 6, when the viscoelastic body 31 moves over the convex portion 12a and moves relative to the first filler 12 due to creep deformation, the viscoelastic body 31 moves from the lower surface of the convex portion 12a to the initial stage of movement. A normal force F3 acts on the upper surface of the elastic body 31. Since this vertical drag F3 is larger than the normal drag F1 before movement, it is possible to generate a larger frictional force on the viscoelastic body 31 than before the movement, and the relative movement of the viscoelastic body 31 with respect to the first filler 12 is caused. Suppressed.
In addition, the convex part 22a is comprised vertically symmetrically in the state spaced apart from the convex part 12a.

Next, a method for manufacturing the roof panel 4 will be described with reference to FIG.
FIG. 7 is a longitudinal sectional view corresponding to FIG.
First, as shown in FIG. 7A, in the preparation step, the first panel body 10 including the first base panel 11 and the first filler 12 bonded to the lower surface of the first base panel 11, The 2nd panel body 20 which consists of the 2 base panel 21 and the 2nd filler 22 adhere | attached on the upper surface of this 2nd base panel 21 and the four viscoelastic bodies 31-34 are prepared.
As for the 1st filler 12 and the 2nd filler 22, convex part 12a, 22a is formed in each inner surface vicinity part after foaming or after foaming, respectively.
The bonding process between the first base panel 11 and the first filler 12 and the bonding process between the second base panel 21 and the second filler 22 utilize the foaming process of the first and second fillers 12 and 22. Alternatively, after the foaming process of the first and second fillers 12 and 22, it may be separately bonded using an adhesive.

As shown in FIG. 7B, in the arranging step, viscoelastic bodies 31 to 34 are arranged with respect to the second filler 22. At this time, it arrange | positions so that the corner | angular part of the viscoelastic bodies 31-34 may contact | adhere to the corner | angular part of the convex part 22a, and the side wall part of the viscoelastic bodies 31-34 may contact | abut to the side surface of the convex part 22a.
As shown in FIG. 7C, in the intermediate production step, the intermediate 4a of the roof panel 4 is produced. The 1st panel body 10 is made to contact | abut so that the 1st filler 12 may respond | correspond to the viscoelastic bodies 31-34 arrange | positioned at the 2nd filler 22. At this time, it arrange | positions so that the corner | angular part of the viscoelastic bodies 31-34 may contact | adhere to the corner | angular part of the convex part 12a, and the side wall part of the viscoelastic bodies 31-34 may contact | abut to the side surface of the convex part 12a.

As shown in FIG. 7D, in the pressing step, the intermediate body 4a of the roof panel 4 is pressed. In this pressing step, after closing the mold composed of the movable mold 51 and the fixed mold 52, the intermediate body 4a is hot-pressed so that the viscoelastic bodies 31 to 34 and the first and second fillers 12 and 22 The relative movement in the plane parallel direction is converted into a parallel drag acting on the viscoelastic bodies 31 to 34 immediately before the viscoelastic bodies 31 to 34 are moved, and the viscoelastic bodies 31 to 34 and the first and second fillers 12 are converted. , 22 in the plane parallel direction, conversion mechanisms 41 to 44 that can convert the vertical drag acting on the viscoelastic bodies 31 to 34 in the initial movement of the viscoelastic bodies 31 to 34 are configured.
The adhesion between the viscoelastic bodies 31 to 34 and the first and second fillers 12 and 22 is performed simultaneously with the pressing step by utilizing the adhesion characteristics of the viscoelastic bodies 31 to 34 by the heat of the press working.
Also. Since the first and second base panels 11 and 21 are thermoplastic synthetic resin materials, they can be molded into a desired curved shape.

As shown in FIG. 7E, in the mold opening process, the roof panel 4 molded by hot pressing is released from the molds 51 and 52.
In this mold opening process, after the movable mold 51 is separated from the fixed mold 52, the roof panel 4 is released from the fixed mold 52 by an eject pin (not shown) or the like.

Next, functions and effects of the vehicle panel structure of this embodiment will be described.
According to this vehicle panel structure, the first panel body 10 including the first base panel 11 and the first filler 12 made of synthetic resin bonded to the lower surface of the first base panel 11, and the second base panel. 21 and a second panel body 20 composed of a synthetic resin second filler 22 bonded to the upper surface of the second base panel 21, and sandwiched between the first panel body 10 and the second panel body 20. Since the viscoelastic bodies 31 to 34 are bonded to the respective inner surfaces, the weight of the vehicle body can be reduced, and the vibration damping performance and the sound insulation performance in the low frequency band can be improved.
When relative movement in the plane parallel direction between the viscoelastic bodies 31 to 34 and the first and second fillers 12 and 22 occurs due to the vibration of the first and second panel bodies 10 and 20, the viscoelastic body 31. To 34 and the first and second fillers 12 and 22 are provided with conversion mechanisms 41 to 44 that convert the relative movement in the plane parallel direction to the normal force acting on the viscoelastic bodies 31 to 34, so that the viscoelastic body 31 is provided. The vertical drag can be increased using the initial relative movement by ˜34, and the frictional force between the viscoelastic bodies 31 to 34 and the first and second fillers 12 and 22 can be increased. Since the relative movement of the viscoelastic bodies 31 to 34 in the plane parallel direction with respect to the first and second fillers 12 and 22 can be suppressed, the vibration of the first and second base panels 11 and 21 is the viscoelastic body. It is transmitted with a high transmission rate to 31 to 34, and the vibration damping performance can be improved.

  Since the conversion mechanisms 41 to 44 are configured by the convex portions 12a and 22a formed in the vicinity of the inner surfaces of the first and second fillers 12 and 22, the first of the viscoelastic bodies 31 to 34 is configured with a simple configuration. , Relative movement in the plane parallel direction with respect to the second fillers 12 and 22 can be suppressed.

  Since the conversion mechanisms 41 to 44 are constituted by the protruding portions 12a and 22a of the ridges formed in the vicinity of the inner surfaces of the first and second fillers 12 and 22, the first of the viscoelastic bodies 31 to 34 is formed. The relative movement in the plane parallel direction with respect to the second fillers 12 and 22 can be reliably suppressed.

  Since a plurality of the viscoelastic bodies 31 to 34 are provided on the left and right sides of the front-rear line X of the vehicle body 1 in a separated state, the weight of the vehicle body and the cost can be further reduced.

  Since the conversion mechanisms 41 to 44 are formed in the vicinity of the inner surfaces of the first and second fillers 12 and 22 along at least the front and rear line X side ends of the viscoelastic bodies 31 to 34, the conversion mechanism 41 is provided. The configuration of .about.44 can be further simplified.

  Since the first and second base panels 11 and 21 are made of a fiber reinforced resin material and the first and second fillers 12 and 22 are made of foam, the weight of the vehicle body can be reduced and the sound insulation performance can be further improved. Can do.

According to this vehicle panel structure manufacturing method, the placement step of placing the viscoelastic bodies 31 to 34 with respect to the second filler 22 and the viscoelastic bodies 31 to 34 placed on the second filler 22 Since the intermediate body generating step of generating the intermediate body 4a by bringing the first panel body 10 into contact with each other so as to correspond to the one filler 12, in the pressing step, the thermoforming, the viscoelastic bodies 31 to 34, and the second The first and second fillers 12 and 22 can be bonded simultaneously.
In order to form the intermediate body 4a into a predetermined shape, the viscoelastic body is subjected to the relative movement in the plane parallel direction between the viscoelastic bodies 31 to 34 and the first and second fillers 12 and 22 by heat molding with the molds 51 and 52. Since it has the press process which comprises the conversion mechanisms 41-44 which convert into the vertical drag which acts on 31-34, the vertical drag is increased using the initial relative movement by the viscoelastic bodies 31-34, and the viscoelastic body 31 The roof panel 4 which can increase the frictional force between? 34 and the first and second fillers 12 and 22 can be manufactured.

  Since the first and second base panels 11 and 21 are made of a thermoplastic synthetic resin material, high-precision thermoforming can be performed in the pressing process.

Next, the roof panel 4A according to the second embodiment will be described with reference to FIG.
In addition, the same code | symbol is attached | subjected to the member similar to Example 1. FIG.
In the first embodiment, the conversion mechanism 41 is constituted by the protrusions 12a and 22a of the protrusions protruding from the inner surfaces of the first and second fillers 12 and 22, whereas in the second embodiment, the conversion mechanism 41 is converted. The mechanism 41A includes a plurality of protrusions 12b and 22b in addition to the protrusions 12a and 22a.

  As shown in FIG. 8, the roof panel 4A includes a first panel body 10A composed of a first base panel 11 and a first filler 12A, and a second panel composed of a second base panel 12 and a second filler 22A. A body 20A, a viscoelastic body 31A sandwiched between the first panel body 10A and the second panel body 20A and bonded to the inner surfaces thereof, a conversion mechanism 41A, and the like are provided.

The conversion mechanism 41A has convex portions 12a and 22a and a plurality of protruding portions 12b and 22b.
The plurality of protrusions 12b are each formed in a substantially conical shape projecting downward from the lower surface, which is a reference surface corresponding to the majority of the first filler material 12A, and penetrate into the viscoelastic body 31A.
Thereby, when the viscoelastic body 31A relatively moves, a parallel drag acts on the viscoelastic body 31A from the side surface of the protrusion 12b immediately before the viscoelastic body 31A moves, and the viscoelastic body 31A relatively moves. In the initial movement of the viscoelastic body 31A, a vertical drag acts on the viscoelastic body 31A from the tip of the protrusion 12b. The plurality of protrusions 22b are vertically symmetrical with the plurality of protrusions 12b.
The protrusions 12b and 22b may be formed integrally with the first and second fillers 12A and 22A, and separate members having higher physical properties than the viscoelastic body 31A may be used as the first and second members. You may attach to filler 12A, 22A.

Next, the roof panel 4B according to the third embodiment will be described with reference to FIG.
In the first embodiment, the conversion mechanism 41 is constituted by the protrusions 12a and 22a of the protrusions protruding from the inner surfaces of the first and second fillers 12 and 22, whereas in the third embodiment, the conversion mechanism 41 is converted. The mechanism 41B includes recesses 12c and 22c.

As shown in FIG. 9, the roof panel 4B includes a first panel body 10B composed of a first base panel 11 and a first filler 12B, and a second panel composed of a second base panel 12 and a second filler 22B. A body 20B, a viscoelastic body 31B sandwiched between the first panel body 10B and the second panel body 20B and bonded to the inner surfaces thereof, a conversion mechanism 41B, and the like.
The vertical dimension of the viscoelastic body 31B is set to be larger than the separation distance between the first and second fillers 12B and 22B.

The conversion mechanism 41B has recesses 12c and 22c.
The recess 12c is formed so as to be recessed upward from the lower surface, which is a reference surface corresponding to the most area of the first filler 12B, and can be accommodated in a state in which the upper end side portion of the viscoelastic body 31B is fitted. Has been. The depth of the recess 12c is set to be 1/3 or less of the vertical dimension of the first filler 12B. The upper wall surface of the viscoelastic body 31B is in close contact with the upper surface of the recess 12c, and the upper end portion of the side wall of the viscoelastic body 31B is in close contact with the side surface of the recess 12c over the entire circumference. Touching. The recess 22c has a vertically symmetrical structure with the recess 12c.
Thus, the vibrations of the first and second base panels 11 and 21 are converted into deformation of the viscoelastic body 31B while reliably preventing the relative movement of the viscoelastic body 31B in the entire circumferential direction.

Next, the roof panel 4C according to the fourth embodiment will be described with reference to FIG.
In the first embodiment, the conversion mechanism 41 is configured by the convex portions 12a and 22a that are in surface contact with the side wall portion of the viscoelastic body 31, whereas in the fourth embodiment, the convex portions 12a and 22a are omitted and converted. The mechanism 41C includes a plurality of convex portions 12d and 22d that enter the middle portion of the viscoelastic body 31C.

  As shown in FIG. 10, the roof panel 4C includes a first panel body 10C composed of a first base panel 11 and a first filler 12C, and a second panel composed of a second base panel 12 and a second filler 22C. It includes a body 20C, a viscoelastic body 31C sandwiched between the first panel body 10C and the second panel body 20C and bonded to the inner surface thereof, a conversion mechanism 41C, and the like.

The conversion mechanism 41C has a plurality of convex portions 12d and 22d.
The plurality of convex portions 12d are respectively formed on protrusions protruding downward from the lower surface, which is a reference surface corresponding to the most region of the first filler 12C, and penetrate into the viscoelastic body 31A.
Thereby, when the viscoelastic body 31C relatively moves, a parallel drag acts on the viscoelastic body 31C from the side surface of the convex portion 12d immediately before the viscoelastic body 31C moves, and the viscoelastic body 31C relatively moves. In the initial movement of the viscoelastic body 31C, a vertical drag acts on the viscoelastic body 31C from the lower surface of the convex portion 12d. The plurality of convex portions 22d are vertically symmetrical with the plurality of convex portions 12d.
The convex portions 12d and 22d may be integrally formed with the first and second fillers 12C and 22C, and separate members having physical properties higher in rigidity than the viscoelastic body 31C may be used as the first and second members. You may attach to the fillers 12C and 22C.

Next, a modified example in which the embodiment is partially changed will be described.
1) In the above embodiment, an example of a roof panel has been described. However, any portion may be used as long as a vibration damping function is required such as between vehicle body skeletons or between wheel support portions. The present invention may be applied to a side panel structure, a dash panel structure, or the like.

2] In the above embodiment, an example in which four square viscoelastic bodies are installed around the center of the roof panel has been described. However, the number of viscoelastic bodies may be three or less, or five or more. .
Moreover, although the example of the square-shaped viscoelastic body was demonstrated by planar view, you may form in circular shape by planar view, and it is also possible to make it another shape.

3) In addition, those skilled in the art can implement the present invention with various modifications added without departing from the spirit of the present invention, and the present invention includes such modifications. is there.

DESCRIPTION OF SYMBOLS 1 Vehicle 4, 4A-4C Roof panel 10, 10A-10C 1st panel body 11 1st base panel 12, 12A-12C 1st filler 12a, 12d Convex part 12b Protrusion part 12c Concave part 20, 20A-20C 2nd panel Body 21 Second base panel 22, 22A-22C Second filler 31, 31A-31C Viscoelastic body 41, 41A-41C Conversion mechanism 42-44 Conversion mechanism

Claims (7)

In the vehicle panel structure in which the viscoelastic body is sandwiched in the space formed between the first base panel and the second base panel,
A first panel body comprising the first base panel and a first filler made of synthetic resin adhered to the inner surface of the first base panel on the space side;
A second panel body comprising the second base panel and a second filler made of synthetic resin bonded to the inner surface of the second base panel on the space side;
And arranging a plurality of viscoelastic body sandwiched by being adhered to the inner surface of each Rutotomoni state are separated from each other between the first panel member and the second panel member,
When relative movement in the plane parallel direction of the viscoelastic body and the first and second fillers occurs due to the vibration of the first and second panel bodies, the viscoelastic body and the first and first panels A conversion mechanism that converts relative movement in a plane parallel direction with the two fillers into a surface orthogonal direction drag acting on the viscoelastic body ;
The conversion mechanism has a pair of convex portions that are formed on the inner surfaces of the first and second fillers and are opposed to each other in a vertically symmetrical manner in a separated state,
The vehicle panel structure according to claim 1, wherein the pair of convex portions are configured to be in contact with a side portion of the viscoelastic body . 2. The vehicle panel structure according to claim 1 , wherein the conversion mechanism includes a protrusion formed in the vicinity of the inner surface of each of the first and second fillers . Vehicle panel structure according to claim 1 or 2, wherein the viscoelastic body, characterized in that provided in plurality in a separated state on both sides of the vehicle body centerline. The conversion mechanism, at least, according to claim 3, characterized in that the first along the center line side end portion of the viscoelastic body, formed on the inner surface near portions of each of the second filler Vehicle panel structure. The first and second base panels are made of a fiber reinforced resin material;
The vehicle panel structure according to any one of claims 1 to 4, wherein the first and second fillers are made of foam . In a method for manufacturing a vehicle panel structure in which a viscoelastic body is sandwiched in a space formed between a first base panel and a second base panel,
A first panel body composed of the first base panel and a first filler made of synthetic resin bonded to the inner surface of the first base panel on the space side; the second base panel; and the second base panel. A second panel body made of a synthetic resin second filler bonded to the inner surface of the space side, a viscoelastic body, and a protrusion formed in the vicinity of the inner surface of each of the first and second fillers. A preparation process for preparing a part;
The corner portion of the viscoelastic body and the corner portion of the convex portion formed on the second filler are in close contact, and the side portion of the convex portion formed on the side portion of the viscoelastic body and the second filler is formed. An arrangement step of arranging the viscoelastic body with respect to the second filler so that the
The corner portion of the viscoelastic body and the corner portion of the convex portion formed on the first filler are in close contact with each other, and the side portion of the convex portion formed on the side portion of the viscoelastic body and the first filler. And the viscoelastic body disposed on the second filler so that the pair of convex portions formed in the vicinity of the inner surface of each of the first and second fillers face each other in a separated state. An intermediate generation step of generating an intermediate by contacting the first panel body;
A press step of heat-molding with a mold to form the intermediate body into a predetermined shape;
The manufacturing method of the panel structure for vehicles characterized by having. The method for manufacturing a vehicle panel structure according to claim 6, wherein the first and second base panels are made of a thermoplastic synthetic resin material .