JP2002347055A - Cavity seal material of automobile - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cavity seal material of an automobile which is engaged easily with a support and also excellent in properties of sealing inside a cavity. SOLUTION: The cavity seal material 1 is constituted of a pliable foam 2 which foams by heating so that the volume thereof is expanded, and the support which has a surface supporting the foam 2 in the cavity. The foam 2 has engaging projections 3 and 4 projecting respectively from the surface and the rear of the foam and molded integrally therewith. The support 5 has recesses 7 formed at positions corresponding to the engaging projections 3 and 4. The engaging projections 3 and 4 have pawls at the fore ends. In a state wherein the foam 2 is supported by the support 5, the engaging projections 3 and 4 are inserted through the recesses 7, and the pawls are engaged with the support 5.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a sealing material for sealing a cavity formed in a body panel of an automobile.

[0002]

2. Description of the Related Art Generally, an automobile body is constructed by welding a plurality of steel plates. For example, as shown in FIG. 8, a pillar 100 serving as a three-dimensional post has a three-dimensional structure having a hollow cavity 103 by welding both end edges of two press-formed steel plates 101 and 102. Such a three-dimensional structure of the body is effective in increasing the apparent cross-sectional area and improving the strength of the body of the automobile.

[0003] On the other hand, in this type of three-dimensional structure, the presence of a long cylindrical cavity causes external noise such as wind noise and road noise generated when the vehicle is running to propagate using the air in the cavity as a medium, and the vehicle interior There is a problem that the quietness of the vehicle is impaired. In order to solve this, the cavity is sealed with a sealing material, and the propagation of noise (air) in the cavity is suppressed.

As a sealing material for the cavity, a synthetic resin foam is preferably used. The foam is filled into the cavity in an unfoamed state, and then foamed by heating or the like to increase the volume, thereby sealing the cross section of the cavity without gaps. A more rational method of sealing the inside of the cavity with a synthetic resin foam is to use a heat-foamable synthetic resin as a seal material, hold this in an unfoamed state in the cavity before the body painting process, Electrodeposition,
The use of the heat that the body inevitably receives during the baking process. That is, the heat-foamable synthetic resin is heated to a temperature of about 140 to 210 ° C. by heating during the body coating process, thereby foaming the heat-foamable synthetic resin to increase the volume and completing the sealing of the cavity. It is to make it.

In order to obtain desired sound insulation characteristics, etc.,
The sealing material of the cavity needs to be held at a predetermined position in the cavity. Conventionally, a support plate for supporting a foam has been used to hold a sealant in a cavity.

[0006] The support plate is made of a material such as a steel plate or a resin having a heat-resistant temperature higher than the temperature acting on the foam. The support plate is formed into a box shape or a plate shape, and the foam is formed inside or on the surface thereof. To support. In addition, a clip for attaching to the body is provided at an end of the support, and the foam is supported at a predetermined position in the cavity by attaching the support to the body with the clip. The foam is supported by the support in an unfoamed state, and the support is attached to the body in that state. The foam is foamed at the supported position by the subsequent heating to seal the cavity, and even if the foam is softened by the heating, no displacement or dripping occurs.

[0007] Regarding the support structure of the foam, see JP-A-2000-2000.
Japanese Patent Application Laid-Open No. -6180 discloses a method in which an engaging claw is integrally provided on a plate-like support, and an engaging opening for engaging the engaging claw is formed in the foam. There is disclosed a configuration in which an engaging claw is engaged with an engaging opening while being bent, and a foam is supported on a support. Also, Japanese Patent Application Laid-Open No. 9-480
In Japanese Patent Publication No. 38, a mounting hole is formed on a side surface of a foamable material, and a locking clip that elastically engages the hollow structure is fitted into the mounting hole, and the locking clip is integrally formed with the foamable material. A structure protruding in a shape is disclosed.

[0008]

However, the conventional foam support structure described above has the following problems.

In the structure disclosed in Japanese Patent Application Laid-Open No. 2000-6180, since the support is made of a material having high heat resistance, that is, a material that is hard at room temperature, a large force is required to bend the engaging claw. there were. In this manner, the operation of applying a large force to the engaging claw to bend it (forcibly) is inefficient and burdens the operator, and also tends to cause a defect such as a break of the engaging claw. On the other hand, in the structure disclosed in Japanese Patent Application Laid-Open No. 9-48038, the locking clip is directly fitted into the foaming material, so that a practical problem is that the locking clip is heated by foaming the foaming material. Deforms and loses the function of locking to the hollow structure, and the foamable material falls. Therefore, this structure has not been put to practical use.

[0010] By the way, considering the approximately symmetrical body structure of an automobile, it is necessary to use two symmetrical seal materials for the left and right cavities. conventionally,
Since the left and right foams and the support were molded respectively, two types of products had to be manufactured, and as a result, the number of molds and parts was increased accordingly. An increase in the number of dies and parts means an increase in dies manufacturing costs and dies and parts management costs.

SUMMARY OF THE INVENTION An object of the present invention is to provide an automobile cavity sealing material which can be easily engaged with a support and has excellent sealing properties in a cavity. It is another object of the present invention to provide an automobile cavity sealing material which can be used for the left and right cavities of an automobile body in addition to the above objects.

[0012]

According to the present invention, there is provided a cavity sealing material provided in a cavity for sealing a cavity formed in a body panel of an automobile. A flexible foam that expands and expands in volume when heated,
A support having a support surface for supporting the foam in the cavity, wherein the foam has an engaging claw protruding from a surface facing the support of the support and having a tip at an end thereof. And the support is formed integrally with the support, and a recess is formed in the support, through which the protrusion is inserted. The protrusion is inserted into the recess, and the claw engages with the support. Thus, the foam is supported by the support.

According to the cavity seal material of the present invention, since the projection for engaging the foam with the support is provided on the foam, which is a flexible member, the engagement between the foam and the support is provided. At the time of joining, only a small force is required, and the projection is not damaged. In addition, the cavity sealing material is installed in the cavity in a state where the foam is not foamed, and thereafter, the foam is foamed in the cavity by heating the body panel of the automobile, thereby sealing the cavity. The foam is supported by the support by the projections being inserted into the recesses of the support, and the claws of the projections are engaged with the support, so that the foam is removed from the support by heating the body panel. It does not shift or fall, and the cavity is reliably sealed by foaming.

[0014] Further, the support has a support surface on the front and back, and a first protrusion of the foam protrudes from the surface of the foam.
And a second projection protruding from the back surface. In this case, for example, the foam is supported on the front surface side of the support by inserting the second protrusion into the concave portion of the support with the front surface of the support facing the back surface of the foam, The foam can be supported on the back surface side of the support by inserting the first protrusion into the concave portion of the support with the back surface facing the surface of the foam. In this way, when the foam is supported on the back side of the support, the front and back sides of the support are inverted, so that the same seal and the same foam are used, but the cavity seal is formed in the symmetrical left and right cavities. It can be shared.

A first projection and a second projection provided on the foam;
May be provided at the same position in the thickness direction of the foam, or may be provided at different positions. In particular, by providing the first projection and the second projection at different positions, it is possible to mold a foam without using a slide mold. The molding of the foam to be shaped becomes easy.

The engagement structure between the foam and the support, which is constituted by the protrusion of the foam and the recess of the support, may be provided at the peripheral portion of the foam or at the center of the foam. Is also good. Further, by forming the central region of the foam to be thin with respect to the peripheral region, and by supporting the foam in the thin region, when the foam is foamed, the center foamed first due to the thinness. Since the region limits the foaming direction of the peripheral region, efficient sealing is possible.

[0017]

Next, embodiments of the present invention will be described with reference to the drawings.

(First Embodiment) FIG. 1 shows a first embodiment of the present invention.
It is a perspective view of a cavity seal material of the embodiment of the present invention,
The state before combining a foam and a support is shown.

As shown in FIG. 1, a cavity sealing material 1 of the present embodiment comprises a foam 2 having heat-foamability, and front and back support surfaces (front surface 5a and back surface 5b) for supporting foam 2
And a plate-shaped support 5 having

The support 5 is formed by molding a resin having high heat resistance such as nylon, and the end face 5c is provided at a position where the cavity sealing material 1 is attached, that is, a cavity formed in the body of an automobile. It has a shape substantially along the cross-sectional shape of the cavity so that it can be fitted inside (not shown). In addition, a plurality of recesses 7 are formed in the end face 5c of the support 5 as groove-shaped cutouts, whereby the outer shape of the support 5 is zigzag. Two of the recesses 7 are end faces 5c
Is preferably provided at a site opposed to the above.

A clip 6 for attaching the cavity sealing material 1 to the cavity is provided on one side surface of the support 5. Correspondingly, an opening into which the clip 6 is inserted is formed in the body of the automobile. The clip 6 has elastic legs elastically engaged with the opening, and the cavity sealing material 1 is attached to a predetermined position inside the cavity by engaging the elastic legs with the opening of the body. . The clip 6 is preferably formed integrally with the flat portion of the support 5, but may be separate.

The foam 2 is a flexible molded body obtained by molding a material having a property of expanding and expanding in volume by being heated to a required shape by injection molding or the like in an unfoamed state. is there. The foaming temperature of the foam 2 is preferably substantially equal to or lower than the temperature (140 to 210 ° C.) at which the body of the vehicle is heated in the electrodeposition and baking coating process of the vehicle. As long as it has such properties, as the material of the foam 2, any resin such as urethane-based, epoxy-based, rubber-based, or olefin-based resin can be used. In addition, foam 2
A mixture of fillers may be used.

The foam 2 is supported on the support 5 by being superposed on the front or back surface of the support 5. When the cavity sealing material 1 is attached to the cavity, the foam 2 is placed above the support 5. It is located in. As a structure for engaging the foam 2 with the support 5, a plurality of engagement protrusions 3 protruding from the surface of the periphery of the foam 2, and these engagements in the thickness direction of the foam 2 are provided. A plurality of engaging projections 4 projecting from the back surface of the foam 2 at the same position as the projections 3
Are integrally formed. That is, the foam 2 is the foam 2
Is symmetrical with respect to a plane bisecting the thickness in the thickness direction.
Each of the engagement projections 3 and 4 is arranged at a position corresponding to the concave portion 7 formed on the support 5 in a state where the foam 2 is superimposed on the support 5.

As shown in FIG. 2, each of the engaging projections 3 and 4 has a leg 3 projecting from the front surface or the back surface of the foam 2.
a, 4a and engaging claws 3b, 4b extending from the distal ends of the legs 3a, 4a toward the central region of the foam. The legs 3a, 4a can be fitted into the recesses 7 of the support 5, but the engaging claws 3b, 4b cannot pass through the recesses 7 unless the legs 3a, 4a are deformed. The heights of the legs 3 a and 4 a are substantially equal to the thickness of the support 5.

The support of the foam 2 on the support 5
By using the flexibility of the above, each engaging protrusion 3 on the front surface side or the engaging protrusion 4 on the rear surface side is engaged with the corresponding concave portion 7 of the support 5. The case where the foam 2 is supported on the surface 5a side of the support 5 will be described below with reference to FIG.

First, as shown in FIG.
The front surface 5a of the foam 2 and the back surface 2b of the foam 2 are opposed to each other, and an external force is applied to the engaging projection 4 on the back surface 2b side of the foam 2 to flex the leg 4a outward. Are relatively close to each other, whereby the engaging claw 4b and the leg 4a of the engaging protrusion 4 are inserted into the concave portion 7 of the support 5. Next, when the front surface 5c of the support 5 and the back surface 2b of the foam 2 come into contact with each other, the external force applied to the engagement protrusion 4 is released. Thereby, as shown in FIG. 3B, the engaging claws 4 b of the engaging projections 4 engage with the back surface 5 b of the support 5, and the engaging claws between the back surface 2 b of the foam 2 and the engaging protrusions 4. 4b and support 5
Is sandwiched in the thickness direction, and the foam 2 is supported on the surface 5 c of the support 5.

In this state, since the legs 4a of the engaging projections 4 are fitted into the concave portions 7 of the support 5, the foam 2 moves with respect to the support 5 in the width direction of the engaging projections 4. Is regulated. By making the width of the concave portion 7 smaller than the width of the leg portion 4a, the leg portion 4a is compressed in the concave portion 7 and the engaging projection 4 is
It is also possible to keep it immovable within. As described above, two of the recesses 7 are connected to the end face 5 of the support 5.
By providing the foam 2 at a position opposite to the position c, the movement of the foam 2 in the direction of arrow A in FIG.

On the other hand, the upper and lower positional relationship between the support 5 and the foam 2 is reversed, and the engaging claws 3b of the engaging projections 3 on the surface 2a side of the foam 2 are engaged with the support 5 in the same manner as described above. By doing so, the foam 2 can be supported on the back surface side of the support 5. In this case, by turning the front and back so that the foam 2 is positioned above the support 5, the cavity seal material 1 can be shared with the symmetrical cavity of the automobile.

As described above, the support 5 is provided with the plurality of recesses 7 and the engagement projections 3
With the configuration in which the foam 4 is provided on the foam 2, the engagement protrusions 3 and 4 are bent, and the foam 2 is supported by the support 5 by engaging with the concave portion of the support 5. Foam 2
Is a flexible member, and only a small force is required to deflect the engagement protrusions 3 and 4. Therefore, it is possible to easily support the foam 2 on the support 5 without using special tools and parts, with a small force, and without damaging the engagement structure between the support 5 and the foam 2. Can be. Further, since the support 5 has a simple structure having only the concave portion 7 with which the engaging projections 3 and 4 are engaged and the clip 6 for attaching to the cavity, the manufacturing cost and weight of the support 5 itself are reduced. Can also be reduced.

The cavity sealing material 1 is attached to a predetermined position inside the cavity formed in the body as described above before the step of painting the body of the automobile. Thereafter, when the body is heated in the body coating process, the foam 2 foams and expands in volume, thereby sealing the cavity. As described above, the foam 2 is in a state where the legs 3a and 4a of the engagement protrusions 3 and 4 are inserted into the concave portions 7 of the support 5 and the engagement claws 3b and 4b are engaged with the support 5. Since the foam 2 is supported by the support 5, the foam 2 does not shift or drop from the support 5 due to heating of the body. As a result, the cavity can be reliably sealed by foaming and expanding the foam 2. The foam 2 has only a lower surface supported by the support body 5, and there is no member for regulating the position on the upper surface. Therefore, depending on the required sound insulation performance, the foam 2 is The thickness can be set arbitrarily.

Further, as described above, the foam 2 can be supported on both the front surface and the back surface of the support 5 and the cavity sealing material 1 can be shared by the symmetric left and right cavities of the body of the automobile. By doing so, the types of the foam 2 and the support 5, the cost of manufacturing a mold for molding the foam 2 and the support 5, and the management cost of these molds are reduced by half compared to the case where the left and right seal materials are used separately. It can be. When the cavity sealing material 1 is used for both the left and right sides, an instruction mark indicating which one of the right and left cavities is to be used is displayed on the foam 2, the support 5 or both. Preferably, it is provided on the back surface.

FIG. 4 shows a modification of the cavity sealing material shown in FIG. The cavity sealing material 11 shown in FIG.
Similar to the one shown in FIG. 1, a plurality of engaging projections 13 and 14 protruding from the front surface and the rear surface, respectively, are formed integrally with the foam 12 at the peripheral portion, and are positioned at positions corresponding to the respective engaging projections 13 and 14. The support member 15 is provided with the engaging recesses 17a and 17b disposed therein.
The positions of 3 and 14 are different between the front side and the back side in the thickness direction of the foam 12, and accordingly, the concave portions 17
Regarding the position and number of the engagement projections 13 and 14
Is greatly different from the one shown in FIG.

In the example shown in FIG. 4, the shape of the end face of the cavity seal material 11 is different from that shown in FIG. 1. This is because the cavity to which the cavity seal material 11 is attached has a shape shown in FIG. This is because it is assumed that the shape differs from that shown in the drawing, and the end face of the cavity sealing material 11 has a shape substantially along the cross-sectional shape of the cavity as in the example shown in FIG.

As described above, by providing the engagement projections 13 projecting from the front surface of the foam 12 and the engagement projections 14 projecting from the back surface at different positions, the plate-like portion of the foam 12 is Through holes 12c and 12d that penetrate the plate-like portion of the foam 12 in the thickness direction thereof can be formed in regions of the mating projections 13 and 14 facing the protruding portions of the engaging claws. By forming the through holes 12c and 12d, the engaging claws of the engaging protrusions 13 and 14 can be formed without using a slide die. This makes it possible to integrally mold the foam 12 having more engaging projections 13 and 14 on the front side and the back side without complicating the mold structure.

In addition, since the engaging projections 13 and 14 of the foam 12 are arranged as described above, the support 15
Has a concave portion 17a corresponding to the position of the engaging protrusion 13 on the front surface side of the foam 12, and a concave portion 17b corresponding to the position of the engaging protrusion 14 on the rear surface side. Therefore, the engagement protrusions 14 on the back side of the foam 12
Is engaged with the concave portion 17b of the support 15, the foam 12 can be supported on the front side of the support 15, while the positions of the foam 12 and the support 15 are switched, and If the engaging projection 13 is engaged with the concave portion 17a of the support 15, the foam 12 can be supported on the back surface side of the support 15, and as shown in FIG. Cavity sealing material 1 that can be shared
It becomes 1.

Further, in the present embodiment, an instruction mark 18 indicating whether the object is for left or right is provided on the front and back surfaces of the foam 12.
It is integrally molded in relief. In this example, specifically, an “L” -shaped instruction mark on the front side and an “R” on the back side
A letter-shaped indication mark (not shown) is provided, and when used for the left side, when used for the right side so that the surface on which the “L” -shaped indication mark is provided faces the opposite side to the support 15. The support 1 has a surface provided with an “R” -shaped indicating mark.
5 is attached to the support 15 so as to face the opposite side. As described above, by forming the foam 12 into a structure that can be formed by a slide mold, the foam 1 having a complex-shaped projection structure can be formed.
The indication mark 18 can be integrally formed on the front surface and the back surface of the second member.

Further, as shown in FIG. 5, similar indication marks 19 may be provided on the front and back surfaces of the support 15.
In the example shown in FIG. 5, an “R” -shaped instruction mark is provided on the front surface side of the support 15 and an “L” -shaped instruction mark (not shown) is provided on the rear surface side. Supports the foam 12 on the surface on which the “R” -shaped indicating mark 19 is provided. Thus, in a state where the support 15 and the foam 12 are assembled, the “L” -shaped indication mark on the back side of the support 15 is exposed, and it can be easily distinguished that the support mark 15 is used for the left side. Moreover, foam 1
The indication mark 18 as shown in FIG.
Appears, it can be distinguished from which side of the foam 12 or the support 15 the cavity is used. Note that the instruction mark indicates that the foam 1
2 or only on the support 15.

(Second Embodiment) FIG. 6 shows a second embodiment of the present invention.
It is a perspective view of a cavity seal material of the embodiment of the present invention,
The state before combining a foam and a support is shown. FIG. 7 shows the cavity sealing material shown in FIG.
It is BB sectional drawing in a foam in the state which combined the foam and the support body.

The cavity sealing material 21 of this embodiment is also
The foamed body 22 includes a foamed body 22 having heat foamability, and a plate-shaped support body 25 having front and back support surfaces for supporting the foamed body 22.

The foam 22 is made of the same material as that used in the first embodiment, and has an engagement projection 23 projecting from the front side of the foam 22 and an engagement projection 2 projecting from the back side of the foam 22.
4 is integrally formed, and the outer peripheral shape is substantially the same as the cross-sectional shape of the cavity of the automobile body to which the cavity sealing material 21 is attached, as in the first embodiment. . In addition, the engagement protrusion 2
As in the example shown in FIG. 4, through holes are formed in regions facing the portions where the engaging claws 3 and 24 protrude.

In the present embodiment, however, the thickness of the foam 22 in the central region is smaller than that in the peripheral region. Support receiving portions 22e and 22f, which are concave portions for receiving, are formed. Engaging projection 2
Reference numerals 3 and 24 are formed on the support receiving portions 22e and 22f, respectively.

The support 25 is made of the same material as that used in the first embodiment, and is provided with a clip for attachment to the cavity as in the first embodiment. However, the outer peripheral shape is substantially equal to the outer peripheral shape of the support receiving portions 22e and 22f of the foam 22.
It is adapted to be received in the support receiving portions 22e and 22f. Further, with the engagement projections 23 and 24 being located in the support receiving portions 22e and 22f, the engagement holes 27a and 27b with which the engagement projections 23 and 24 are engaged are
It is provided at a position corresponding to the engagement protrusions 23 and 24.

Based on the above-described configuration, the support 25 is fitted into the support receiving portion 22f in a state where the front surface of the support 25 and the support receiving portion 22f on the back side of the foam 22 face each other. The mating projection 24 is inserted into the engaging hole 27b, and the engaging projection 24 engages with the support 25. As a result, the foam 22 is held on the surface of the support 25. Further, by inserting the support 25 into the support receiving portion 22e in a state where the back surface of the support 25 and the support receiving portion 22e on the front surface side of the foam body 22 face each other, the engaging projections 23 form the engaging holes. 27a is inserted into the support 27a and
5, the foam 22 is retained on the back side of the support 25. When this is actually used, the cavity sealing material 21 can be used for the symmetric left and right cavities of the vehicle body by reversing the front and back. In order to distinguish between the case where the cavity sealing material 21 is used for the right side and the case where the cavity sealing material 21 is used for the left side, indication marks 28 and 29 are provided on the front and back surfaces of the foam 22 and the front and back surfaces of the support 25, respectively. I have.

In the present embodiment, the foam 22 is thinned in the central region as described above, and is supported by the support 25 only in the thinned central region.
2 can improve the support stability and reduce the amount of the foam 22 used. By reducing the amount of the foam 22 used, an inexpensive cavity sealing material 21 is provided. Further, by reducing the thickness of the central region of the foam 22, when the foam 22 is foamed, the foaming in the thinned central region precedes, and the previously foamed portion changes the foaming direction in the peripheral region. Restrict. As a result, in the peripheral region of the foam 22, foaming proceeds toward the steel plate forming the cavity, and the cavity can be efficiently sealed.

Further, in this embodiment, the example is shown in which the engaging projections 23, 24 of the foam 22 are formed on the support receiving portions 22e, 22f.
Similarly to the embodiment described above, it may be provided on the peripheral edge of the foam 22. In this case, the length of the engagement claw is set such that the engagement claw of the engagement protrusion is securely engaged with the support.

In this embodiment and the above-described first embodiment, a configuration is adopted in which a wall surface facing the end face of the foam is added to a part of the support, and the foaming direction of the foam is regulated by the wall surface. It is also possible.

[0047]

As described above, according to the present invention, the foam is provided with the projection for engaging the support with the foam, so that the foam can be supported with a small force and without damaging the projection. It can be easily engaged and supported on the body. In addition, since the support may have a simple structure having at least the concave portion, the manufacturing cost and weight of the support itself can be reduced.

Further, when the foam is supported by the support, the engaging projection is inserted into the concave portion of the support, and the claw at the tip engages with the support. Even after heating the body panel to foam the foam after installing it in the cavity, the foam can be prevented from slipping or dropping from the support, and as a result, the cavity can be securely sealed by the foam. It can be carried out.

Further, the support has a support surface on the front and back surfaces thereof, and the protrusion of the foam has a first protrusion protruding from the surface of the foam.
With the structure having the projections and the second projections projecting from the back surface, while using the same support and foam,
The cavity seal can be shared by the left and right symmetric cavities.

[Brief description of the drawings]

FIG. 1 is a perspective view of a cavity sealing material according to a first embodiment of the present invention.

FIG. 2 is a cross-sectional view of a portion of the foam shown in FIG. 1 where an engagement protrusion is provided.

FIG. 3 is a view for explaining an operation of supporting a foam on the surface of a support in the cavity sealing material shown in FIG. 1;

FIG. 4 is a perspective view of a modified example of the cavity sealing material shown in FIG.

FIG. 5 is a perspective view of a support used for the cavity sealing material shown in FIG. 4, as viewed from the back surface side.

FIG. 6 is a perspective view of a cavity sealing material according to a second embodiment of the present invention.

FIG. 7 is a cross-sectional view of the cavity sealing material shown in FIG. 6 in a state where the foam and the support are combined.
It is a line sectional view.

FIG. 8 is a perspective view in which a pillar of an automobile is broken.

[Explanation of symbols]

 1,11,21 Cavity seal material 2,12,22 Foam 3,4,13,14,23,24 Engagement projection 3a, 4a Leg 3b, 4b Engagement claw 5,15,25 Support 6 Clip 7 , 17a, 17b Concave portions 18, 19, 28, 29 Indicating marks 22e, 22f Support receiving portions 27a, 27b Engaging holes

Claims (8)

[Claims] 1. A cavity sealing material provided in a cavity for sealing a cavity formed in a body panel of an automobile, wherein the flexible foam expands and expands in volume when heated. And a support having a support surface for supporting the foam in the cavity, wherein the foam has a claw portion for projecting from a surface facing the support surface of the support and engaging a tip portion thereof. Is formed integrally with the support, and a recess is formed in the support, through which the protrusion is inserted. The protrusion is inserted into the recess, and the claw engages with the support. The cavity sealing material, wherein the foam is supported by the support. 2. The support surface is provided on both sides of the support, and the protrusion has a first protrusion protruding from a surface of the foam and a second protrusion protruding from a back surface of the foam. The cavity sealing material according to claim 1. 3. The cavity sealing material according to claim 2, wherein the first projection and the second projection are provided at the same position in a thickness direction of the foam. 4. The cavity sealing material according to claim 2, wherein the first protrusion and the second protrusion are provided at different positions in a thickness direction of the foam. 5. A symmetrical left and right side of a body panel of the automobile is provided on at least one of the support and the foam, the surface of which the foam is exposed while being engaged with and supported by the support. The cavity sealing material according to any one of claims 2 to 4, further comprising an indication mark indicating which of the types of cavities is installed. 6. The support according to claim 1, wherein the protrusion is formed on a peripheral portion of the foam, and the recess is formed as a groove-shaped notch on an end face of the support. Cavity sealing material. 7. The foamed product according to claim 1, wherein the projection is formed in a central region of the foam, and the recess is formed as an engagement hole penetrating the foam in a thickness direction. The cavity sealing material according to 1. 8. The foam according to claim 1, wherein the central region is formed thinner than a peripheral region, and the support supports the central region of the foam. Item 2. The cavity sealing material according to item 1.