JP2006231956A - Structure and method for mounting foaming substrate - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a structure and a method for mounting a foaming substrate capable of reducing the number of part items and shortening the time required for mounting work. <P>SOLUTION: In this mounting structure of a foaming substrate, an insertion hole 120 for inserting a foaming substrate 100 is bored to a reinforced panel 118 (corresponding to an intermediate panel), and the foaming substrate 100 is equipped with a lock part 106 between a first substrate part 130 and a second substrate part 132. The lock part 106 locks the foaming substrate 100 while the substrate is inserted in the insertion hole 120. The first substrate part 130 and the second substrate part 132 exist in every blocked space blocked by the intermediate panel when they are locked by the lock part 106, respectively. At least one of the first substrate part 130 and the second substrate part 132 has branched pieces 104 and 114 (corresponding to deformed parts) deformable in an enlarging direction in the blocked space. This structure reduces the number of part items, and shortens the working hours. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a mounting structure and a mounting method for a foamable base material, which is attached to a hollow structure having an intermediate panel and foamed by heating to fill a space in the hollow structure.

For example, a hollow structure such as a center pillar or a front pillar of a vehicle body is provided with an intermediate panel because the rigidity is insufficient if it is a single body. Conventionally, in consideration of the fact that the volume of the space partitioned by the intermediate panel (hereinafter simply referred to as “compartment space”) is different, the foamable base material corresponding to the amount of foaming according to the individual partition space is disposed. (For example, refer to Patent Document 1).
JP 2003-182630 A (page 2-3, FIG. 1-2)

However, in the case where a foamable base material is provided for each compartment space, there are problems that the number of parts increases and the time required for the placement work becomes long.
This invention is made in view of such a point, and it aims at providing the attachment structure and attachment method of a foaming base material which shortens the time which an attachment operation | work reduces while reducing a number of parts.

(1) Means for solving the problem (hereinafter, simply referred to as “solution means”) 1 is attached to a hollow structure having an intermediate panel and foamed by heating to fill a space in the hollow structure. An attachment structure for a foamable base material, wherein the intermediate panel has an insertion hole for inserting the foamable base material, and the foamable base material comprises a first base material portion and a second base material portion. An engaging portion is provided in between, the engaging portion engages the foamable base material in a state of being inserted into the insertion hole, and each of the first base material portion and the second base material portion is the engaging member. It is a part which exists for every division space divided by the intermediate panel when locked by a portion, and at least one of the first base material portion and the second base material portion is applicable. The gist is to have a deformable portion that can be deformed in the expanding direction within the compartment space.

According to the solution 1, the foamable base material integrally forms the first base material portion existing in one partition space and the second base material portion existing in the other partition space. Therefore, the number of parts is reduced as compared with the prior art arranged for each partition space. The foamable substrate also has a locking portion that locks itself to the intermediate panel. Therefore, compared with the prior art which required the operation | work which arrange | positions a foamable base material for every division space, since it is only necessary to perform one attachment operation | work, work time can be shortened.
The term “deformation in the expanding direction” in the claims and the description not only means that the deformed portion (that is, the deformed portion or member) opens, but also roughly expands the base material. In a direction intersecting with the direction (hereinafter simply referred to as “insertion direction”) to be inserted into the insertion hole. For example, it corresponds to a case where deformation is performed in a direction substantially orthogonal to the insertion direction, or a case where deformation is performed in a direction oblique to the insertion direction.

(2) Solution 2 is a mounting structure for a foamable base material that is attached to a hollow structure having an intermediate panel and is foamed by heating to fill a space in the hollow structure. An insertion hole for inserting the expandable base material, and a locking portion for locking the foamable base material in a state of being inserted into the insertion hole, and the foamable base material is locked by the locking portion. A first base material portion and a second base material portion respectively present in each of the partition spaces partitioned by the intermediate panel, and at least one of the first base material portion and the second base material portion The gist of the substrate portion is that it has a deformable portion that can be deformed in the expanding direction within the corresponding partition space.

  According to Solution 2, similarly to Solution 1 described above, the foamable base material integrally forms the first base material portion existing in one partition space and the second base material portion present in the other partition space. ing. Therefore, the number of parts is reduced as compared with the prior art arranged for each partition space. Further, the intermediate panel has a locking portion for locking the foamable base material inserted into the insertion hole. Therefore, compared with the prior art which required the operation | work which arrange | positions a foamable base material for every division space, since it is only necessary to perform one attachment operation | work, work time can be shortened.

(3) Solution 3 is the mounting structure for a foamable base material described in Solution 1 or 2, wherein the deformed portion is cut and branched from a position at a predetermined distance from the end of the foamable base material. By rotating and pulling back the foamable base material after the foamable base material is inserted into the insertion hole and pulled back until the tip of the branch piece comes into contact with the intermediate panel. The gist is to deform the branch piece in the expanding direction.

  According to Solution 3, when the foamable substrate is rotated in a state where the tip of the branch piece is in contact with the intermediate panel, the branch piece receives a frictional resistance generated between the branch piece and the intermediate panel. It becomes easy to bend. When the foamable base material is pulled back in such a state that it is easily bent, the deformable portion (specifically, the branch piece) can be easily deformed in the expanding direction. In addition, the timing which rotates a foamable base material, and the timing which pulls back a foamable base material are arbitrary, and it may carry out simultaneously or back and forth so that a branch piece may bend easily.

(4) The solving means 4 is the mounting structure for the foamable base material described in the solving means 1 or 2, wherein the deformed portion is cut and branched from a position at a predetermined distance from the end of the foamable base material. It consists of a branch piece, and the summary is that the branch piece has a shape that decenters a contact point that comes into contact with the intermediate panel when the foamable base material inserted into the insertion hole is moved.

  According to the solution 4, the tip of the branch piece is formed so that the contact point that contacts the intermediate panel has an eccentric shape. For example, an inclined surface is formed, or a protrusion or a vertex of a curved surface is formed at a position shifted from the axis of the branch piece. After the foamable substrate is inserted into the insertion hole, the tip of the branch piece comes into contact with the intermediate panel when the foamable substrate is moved (the insertion is continued or pulled back). As the foamable substrate is moved, the branch pieces tend to buckle according to the moment of force at the eccentric contact point. If the foamable base material is continuously moved in such a state that it is easily buckled, the deformed portion (specifically, the branch piece) can be easily deformed in the expanding direction.

(5) The solving means 5 is the mounting structure of the foamable base material described in the solving means 4, wherein the locking portion includes a convex portion provided on the foamable base material to be hooked on the intermediate panel, and an expansion direction. The gist of the present invention is that the deformed portion deformed in the above manner is locked by a restoring force that presses the intermediate panel to return to the state before the deformation.

  According to the solution 5, the foamable base material may wobble only by hooking the convex portion on the intermediate panel, but the wobbling is suppressed by pressing the intermediate panel by the restoring force of the deformed deforming portion. Therefore, the foamable base material can be reliably locked to the intermediate panel.

(6) The solving means 6 is the mounting structure of the foamable base material described in the solving means 1 or 2, and the intermediate panel has a guide portion that guides the deforming portion in order to deform in the expanding direction. The gist.

  According to the solution means 6, by passing the deformation portion through the guide portion provided in the intermediate panel, the deformation portion is deformed in the expanding direction. Since the direction in which the guide portion is deformed can be restricted, for example, when the partition space is partitioned into a long and narrow shape, the deformable portion can be deformed toward the elongated direction. Therefore, by forming the guide portion in an appropriate shape and direction, it is possible to suppress the occurrence of unfoamed portions in the partition space.

(7) The solving means 7 is the mounting structure of the foamable base material described in the solving means 1 or 2, and the deformed portion has one or more slit-like cuts along the longitudinal direction of the foamable base material. The gist is that it consists of the formed part.

  According to the solution 7, the deformed portion formed of one or a plurality of slit-like cuts is easily bent and easily deformed as compared with a flat plate having no cut. For example, by assembling a hollow structure or the like, the deformable portion can be easily deformed in the expanding direction only by applying pressure to the foamable base material (specifically, the deformable portion).

(8) The solving means 8 is the mounting structure of the foamable base material described in the solving means 1 or 2, wherein the foamable base material is bent at a predetermined position of the deformed portion where the slit-shaped cut is formed, and the bending is performed. The gist is that it is formed into a cylindrical shape by rounding and fastening in the state.

  According to the solution 8, when the deformed portion is bent at a predetermined position (for example, a substantially central position), a part of the deformed portion is overlapped and a slit-like cut portion becomes an octopus foot shape. In the state where it is bent, it is further rounded and clamped so that the above-mentioned bent portion becomes an outer cylinder. The cylindrical foamable base material formed in this way has a two-layer structure of an outer cylinder and an inner cylinder, and when the outer cylinder is locked to the intermediate panel, the inner cylinder can slide. When the inner cylinder is slid in the axial direction (that is, reciprocating), the octopus-shaped cut portion is deformed by bending or stretching. Therefore, the amount of deformation applied to the octopus-shaped cut portion can be adjusted according to the amount of bending of the deformed portion and the amount of sliding of the inner cylinder.

(9) The solving means 9 is a method for attaching a foamable base material, which is attached to a hollow structure having an intermediate panel and foamed by heating to fill a space in the hollow structure. An insertion hole for inserting the foamable base material is opened, and the foamable base material is locked by the locking portion and the locking portion for locking the foamable base material in a state of being inserted into the insertion hole. The first base material portion and the second base material portion that exist for each partition space partitioned by the intermediate panel when the foamable base material inserted into the insertion hole is foamed. A step of locking to the intermediate panel by a locking portion provided in the conductive base material, and the first base material portion and the second base material before or after locking the foamable base material to the intermediate panel Deformation part provided in at least one base material part among parts And summarized in that a step of deforming the expansion direction.

  The point which opened the insertion hole in the intermediate | middle panel, and the point which comprised the foaming base material integrally with the latching | locking part, the 1st base material part, and the 2nd base material part are the same as that of the solution means 1. According to the latter configuration, the number of parts is reduced as compared with the prior art. In the solution means 9, the foamable substrate can be easily obtained simply by performing the step of locking the foamable substrate to the intermediate panel (locking step) and the step of deforming the deformed portion in the expanding direction (deformation step). Can be attached to the hollow structure. Thus, since one foaming base material should just be attached once, work time can be shortened.

  According to the present invention, since the foamable base material is configured by integrating the first base material portion and the second base material portion, the number of parts is reduced. Moreover, since only one foamable base material needs to be locked to the intermediate panel by the locking portion, the working time can be shortened.

  The best mode for carrying out the present invention will be described with reference to the drawings. In addition, when showing directions, such as up, down, left, and right, it means up, down, left, and right in the description of the drawings.

[Embodiment 1]
Embodiment 1 is an example in which a branch piece (that is, a deformed portion) is deformed using frictional resistance when a foamable substrate is attached to a hollow structure, and will be described with reference to FIGS. 1 to 7. To do. About the structural example of a foamable base material, a perspective view is represented in FIG. 1, and a side view is represented in FIG. 3 and 5 are sectional views showing the process of attaching the foamable base material. FIG. 4 is a plan view showing an example of the insertion hole. In FIG. 6, the foamable base material after attaching to a hollow structure is represented with sectional drawing. In FIG. 7, the hollow structure after foaming is represented with sectional drawing.

  The foamable base material 100 shown in FIGS. 1 and 2 includes a base body 102, branch pieces 104 and 114, and the like. The foamable substrate 100 can be obtained by cutting a member formed by, for example, extrusion molding or injection molding. The base body 102 is longer than the branch pieces 104 and 114 in the longitudinal direction. The base body 102 has upper and lower opening holes 110 and 116 penetrating between the side surfaces where the branch pieces 104 and 114 are present. Further, a locking portion 106 for locking to a reinforcement panel 118 (see FIG. 3) described later is formed on the lower surface of the base 102. The locking portion 106 of this example is realized by a pair of upper and lower protrusions (in other words, convex portions) that are formed horizontally so as to sandwich a later-described reinforcement panel 118.

  The branch pieces 104 and 114 corresponding to the deformed portions are each branched by being cut from a position at a predetermined distance (for example, 10 mm) from the lower end portion of the foamable substrate 100. The branch piece 104 has an opening hole 108 penetrating between the side surfaces, and similarly, the branch piece 114 has an opening hole 112. These opening holes 108 and 112 are located at the same position as the opening holes 110 formed in the base body 102 by being formed by extrusion molding or injection molding. Therefore, in a state where the branch pieces 104 and 114 are not deformed (hereinafter referred to as “reference state”), the opening holes 108, 110, and 112 become one through hole when viewed from the side (see FIG. 2). .

  The example which attaches the foamable base material 100 comprised as mentioned above to a hollow structure is demonstrated below. Here, the reinforcement panel 118 shown in FIG. 3 corresponds to an intermediate panel, is a component of a hollow structure, and functions as a reinforcing plate that reinforces the hollow structure. The reinforcement panel 118 is provided with an insertion hole 120 for inserting the foamable substrate 100. When this insertion hole 120 is seen in a plan view, it is represented as shown in FIG. 4, and a long hole 120a for inserting the foamable base material 100 (particularly, the lower part of FIG. 1) and a curved portion for allowing the base 102 to rotate. 120b.

  Returning to FIG. 3, the operator holds the base 102 and attaches the foamable substrate 100 to the reinforcement panel 118 according to the following procedure. That is, the foamable substrate 100 is inserted into the insertion hole 120 from the upper side of the reinforcement panel 118 downward (that is, in the direction of the arrow D10) until the branch pieces 104 and 114 come out from the lower surface of the reinforcement panel 118. Subsequently, the foamable substrate 100 is pulled back and rotated in order to bring the upper ends (that is, the tip portions) of the branch pieces 104 and 114 into contact with the lower surface of the reinforcement panel 118. A slight angle (for example, about 5 ° or 10 °) is sufficient as the rotation angle in this case.

  Next, the upper ends of the branch pieces 104 and 114 are brought into contact with the lower surface of the reinforcement panel 118, and the foamable substrate 100 is rotated while maintaining this contact state. In this rotating operation, a frictional resistance is generated between the branch pieces 104 and 114 and the reinforcement panel 118. Therefore, the branch pieces 104 and 114 that have received the frictional resistance are easily bent in opposite directions. When the foamable base material 100 is pulled back upward (in the direction of arrow D12 in FIG. 5) in such a state that it is easily bent, the branch pieces 104 and 114 are easily deformed in the expanding direction as shown in FIG. . In this example, it is bent in the left-right direction, and can be said to be deformed in a direction intersecting with the insertion direction of the foamable substrate 100 (the direction of the arrow D10 shown in FIG. 3). When the foamable substrate 100 is further pulled back, a part of the locking part 106 passes through the insertion hole 120 while being elastically deformed, and the locking part 106 is locked so as to be sandwiched from above and below the reinforcement panel 118. Thus, the foamable substrate 100 can be locked to the reinforcement panel 118 in a state where the branch pieces 104 and 114 are deformed in the expanding direction.

  Then, as shown in FIG. 5, when the foamable base material 100 locked to the reinforcement panel 118 is pressed from above and below between the inner panel 122 and the outer panel 126, the state shown in FIG. 6 is obtained. . In the example shown in FIG. 6, the base body 102 is deformed into a ring shape together with the opening hole 116 by pressing the inner panel 122, but may be deformed into other shapes. In this example, since it is deformed so as to swell in the left-right direction, it can be said that it is deformed in a direction crossing the insertion direction of the foamable substrate 100 described above. Moreover, the foamable base material 100 in the attached state integrally forms a first base material portion 130 existing in one partition space 128 and a second base material portion 132 existing in the other partition space 134. It can be said. The partition space 128 is a space surrounded by the inner panel 122 and the reinforcement panel 118, and the partition space 134 is a space surrounded by the reinforcement panel 118 and the outer panel 126.

  While maintaining the state of FIG. 6, the ends of the reinforcement panel 118, the inner panel 122, and the outer panel 126 (left and right ends in the example of FIG. 6) are aligned and fixed by welding or the like, thereby forming the hollow structure 124. To do. Thereafter, when the internal space of the hollow structure 124 is heated to a predetermined temperature, the foamable substrate 100 foams, and the internal space of the hollow structure 124 can be filled with the foam 136 as shown in FIG. . The predetermined temperature varies depending on the material of the foamable substrate 100, but corresponds to, for example, 160 ° C to 220 ° C.

According to the first embodiment described above, the following effects can be obtained.
(A1) The reinforcement panel 118 corresponding to the intermediate panel was provided with an insertion hole 120 for inserting the foamable substrate 100 (see FIGS. 3 and 4). The foamable base material 100 is configured to include a locking portion 106 between the first base material portion 130 and the second base material portion 132 (see FIG. 6). The foamable substrate 100 was locked to the reinforcement panel 118 in a state of being inserted into the insertion hole 120 by the locking portion 106 provided on the foamable substrate 100 (see FIG. 5). The branch pieces 104 and 114 provided in the foamable base material 100 are formed so that the first base material portion 130 and the second base material portion 132 can be deformed in the expanding direction within the corresponding partition spaces 128 and 134 (FIG. 1, see FIG. According to this configuration, the number of parts is reduced as compared with the prior art that is provided for each partitioned space (the partitioned spaces 128 and 134 in the example of FIG. 6). The foamable substrate 100 also has a locking portion 106 that locks itself to the reinforcement panel 118. Compared with the prior art that required the operation of disposing the foamable base material 100 for each of the partition spaces 128 and 134 by this locking portion 106, it is only necessary to perform a single mounting operation, thereby reducing the work time. it can.

(A2) Simply performing the step of locking the foamable substrate 100 to the reinforcement panel 118 (locking step) and the step of deforming the branch pieces 104 and 114 in the expanding direction (deforming step) In addition, the foamable substrate 100 can be attached to the hollow structure 124. Thus, since one foaming base material 100 only needs to be attached once, the working time can be shortened.

(A3) The branch pieces 104 and 114 corresponding to the deformed portion were cut into a shape that was branched from a position at a predetermined distance from the end of the foamable substrate 100 (see FIG. 1). After the foamable base material 100 is inserted into the insertion hole 120 and pulled back until the upper ends of the branch pieces 104 and 114 come into contact with the reinforcement panel 118, the foamable base material 100 is further rotated and pulled back. The pieces 104 and 114 were deformed in the expanding direction (see FIGS. 3, 5, and 6). According to this configuration, since the branch pieces 104 and 114 receive frictional resistance generated between the branch pieces 104 and 114, the branch pieces 104 and 114 are easily bent. When the foamable base material 100 is pulled back in such a state that it is easily bent, the branch pieces 104 and 114 can be easily deformed in the expanding direction.

[Another embodiment according to the first embodiment]
Embodiment 1 mentioned above demonstrated the example which deform | transforms the branch pieces 104 and 114 using frictional resistance, when attaching the foamable base material 100 to the hollow structure 124. FIG. Other forms can be realized to realize such a modification, and the other forms will be described below.

(Example 1)
First, the foamable substrate 100 shown in FIG. 1 and FIG. 2 and the like is obtained mainly by injection molding because the locking portion 106 is formed only on the base body 102. Instead of this injection molding, the foamable substrate 100 may be obtained mainly by extrusion molding. For example, the extruded member 140 shown in FIG. 8 is a plan view of a foamable base material obtained by extrusion molding. The extruded member 140 is cut at a thick line portion in order to cut out the individual foamable substrate 100. Before and after the cutting, cuts 140a, 140b, and 140c are made to form the branch piece 114. In this way, a plurality of foamable substrates similar to the foamable substrate 100 shown in FIGS. 1 and 2 are obtained. However, as shown in the side view of FIG. 9, not only the locking portion 142 is formed on the lower side of the base body 102 but also the locking portion 142 is formed on the upper side of the base body 102, and the branch piece 114 or the like is not shown. A locking portion 142 is also formed on the branch piece 104. When the foamable substrate 100 is locked to the reinforcement panel 118, the locking portion 142 formed on the lower side of the base 102 may be used, and the other locking portions 142 are not used. Therefore, even when the foamable substrate 100 is formed by extrusion, the same effects as those of the first embodiment described above can be obtained.

(Example 2)
Next, the foamable base material 100 shown in FIGS. 1 and 2 is formed so that the upper ends (tip portions) of the branch pieces 104 and 114 are substantially horizontal. According to the formed horizontal plane, the contact area with the reinforcement panel 118 is increased, and the frictional resistance generated when the foamable substrate 100 is rotated is also increased, so that the branch pieces 104 and 114 are easily bent. An effect is obtained. The upper ends of the branch pieces 104 and 114 may have a shape in which a contact point that contacts the reinforcement panel 118 when the foamable base material inserted into the insertion hole 120 is moved is eccentric. An example of this shape will be described with reference to FIGS. About the structural example of a foamable base material, a perspective view is represented in FIG. 10, and a side view is represented in FIG. 12 and 14 are sectional views showing the process of attaching the foamable base material. FIG. 13 is a plan view showing an example of the insertion hole. In FIG. 15, the foamable base material after attaching to a hollow structure is represented with sectional drawing. In FIG. 16, the example of the other shape which decenters a contact point is represented with sectional drawing.

  For example, the foamable base material 150 shown in FIGS. 10 and 11 includes a base body 152 and branch pieces 156 and 160. The base 152 corresponds to the base 102 shown in FIG. 1, and the branch pieces 156 and 160 correspond to the branch pieces 104 and 114 shown in FIG. Inclined surfaces 154 and 162 are formed at the upper ends of the branch pieces 156 and 160 so that their directions (inclination angles) are different from each other. Unlike the foamable substrate 100, the opening hole 164 is formed only on the upper side of the base body 152, and the convex portion 158 formed on the base body 152 has a shape corresponding to the upper portion (one side portion) of the locking portion 106 shown in FIG. Consists of.

  The foamable base material 150 formed as described above is attached according to the procedure shown in FIGS. First, as shown in FIG. 12, the base 152 of the foamable base material 150 is inserted into the insertion hole 166 from below the reinforcement panel 118, and the insertion is continued upward (in the direction of arrow D14). Then, the branch pieces 156 and 160 come into contact with the lower surface of the reinforcement panel 118. However, since the contact point of each branch piece is eccentric as described above, the direction of bending is restricted. That is, the branch piece 160 represented by a solid line is bent in the left direction (arrow D16a direction), and the branch piece 156 represented by a broken line is bent in the right direction (arrow D16b direction). Therefore, the branch pieces 156 and 160 can be deformed in the expanding direction. Note that the insertion hole 166 described above can have any shape as long as the base body 152 passes therethrough, and for example, a rectangular hole as shown in FIG.

  The foamable substrate 150 continues to be inserted against the restoring force that the bent branch pieces 156 and 160 try to return to the original state (that is, the state shown in FIGS. 10 and 11). Then, the convex portion 158 provided in the base body 152 passes through the insertion hole 166 while being elastically deformed, and comes out to the upper surface side of the reinforcement panel 118. When the insertion operation is stopped after the removal, the convex portion 158 is caught on the upper surface of the reinforcement panel 118 as shown in FIG. This is because the restoring force of the branch pieces 156 and 160 is nothing but the direction in which the foamable substrate 150 is pulled out from the insertion hole 166 (downward). Therefore, the foamable substrate 150 can be locked to the reinforcement panel 118 by the restoring force of the branch pieces 156 and 160 and the convex portion 158.

  When the base panel 152 is deformed by pressing the inner panel 122 downward, the state shown in FIG. 15 is obtained. In the example shown in FIG. 15, the base body 152 is deformed into a ring shape together with the opening hole 164 by pressing of the inner panel 122, but may be deformed into other shapes. Moreover, the foamable base material 150 in the attached state integrally forms the first base material portion 168 existing in one partition space 128 and the second base material portion 170 existing in the other partition space 134. It can be said. While maintaining this state, the ends of the reinforcement panel 118, the inner panel 122, and the outer panel 126 (right and left ends in the example of FIG. 15) are aligned and fixed to form a hollow structure 124. Thereafter, when the internal space of the hollow structure 124 is heated to a predetermined temperature, the foamable base material 100 is foamed, and the internal space of the hollow structure 124 can be filled with the foam 136 as shown in FIG. .

  In Embodiment 2 described above, the contact points that contact the reinforcement panel 118 when the foamable base material 150 inserted into the insertion hole 120 is moved with respect to the upper end portions (tip portions) of the branch pieces 156 and 160 are decentered. Shapes, that is, inclined surfaces 154 and 162 were formed (see FIGS. 10 and 11). According to this configuration, since the apexes of the inclined surfaces 154 and 162 are eccentric from the center of the branch pieces 156 and 160, the branch pieces 156 and 160 are likely to buckle according to the moment of force at the contact point. If the foamable base material 150 is continuously moved in such a state that it is easily buckled, the branch pieces 156 and 160 can be easily deformed in the expanding direction.

  Further, the locking portion is formed so that the convex portion 158 provided on the foamable base material 150 for hooking on the reinforcement panel 118 and the branch pieces 156 and 160 deformed in the expanding direction return to the state before the deformation. The force panel 118 is locked by a restoring force that presses the force panel 118 (see FIGS. 14 and 15). According to this configuration, the foamable base material 150 may wobble only by hooking the convex portion 158 on the reinforcement panel 118, but wobbling by pressing the reinforcement panel 118 by the restoring force of the branch pieces 156 and 160. Suppress. Therefore, the foamable substrate 150 can be reliably locked to the reinforcement panel 118.

  Note that the shape of the upper end portions (tip portions) of the branch pieces 156 and 160 that decenter the contact point that contacts the reinforcement panel 118 is not limited to the inclined surfaces 154 and 162. For example, the other shape shown in FIG. 16 may be used. Since the branch piece 156 and the branch piece 160 may be formed in the same shape corresponding to the direction to be bent, an example of the branch piece 160 is shown in FIG.

(A) The upper side of FIG. 16 shows an example in which the upper end portion of the branch piece 160 is formed by the inclined surface 162a. The inclined surfaces 154 and 162 are formed so that the apexes are at the ends, whereas the inclined surfaces 162a are different so that the apexes are formed at the intermediate portion. However, since the apex is formed at a position deviated from the central axis of the branch piece 160 represented by the alternate long and short dash line, it becomes a triangular shape when viewed in cross section.
(B) An example in which the upper end portion of the branch piece 160 is formed by a curved surface 162b is shown on the inner side of FIG. The inclined surfaces 154, 162, and 162a are formed as flat surfaces, whereas the curved surface 162b is formed as a curved surface. Similar to the inclined surface 162a described above, the curved surface 162b is formed so that the apex is located at a position deviated from the central axis of the branch piece 160 represented by a one-dot chain line.
(C) An example in which the upper end portion of the branch piece 160 is formed by a convex surface 162d is shown on the lower side of FIG. Although the convex surface 162d is basically a horizontal surface that can be in close contact with the reinforcement panel 118, a protrusion 162c is formed on a part of the horizontal surface. The protrusion 162c is formed at a position that is decentered from the central axis of the branch piece 160 represented by a one-dot chain line.

(Example 3)
As a method for attaching the foamable substrate 100 to the hollow structure 124, the first embodiment has described an example in which the branch pieces 104 and 114 are deformed using frictional resistance (see FIGS. 3 and 5). In the third embodiment, an example in which the branch pieces 104 and 114 are deformed using the insertion hole 120 will be described. First, the foamable base material 100 is inserted into the insertion hole 120 from the upper side of the reinforcement panel 118 as indicated by an arrow D10 shown in FIG. The process up to this point is the same as in the first embodiment, but the foamable substrate 100 is rotated when the upper end portions of the branch pieces 104 and 114 (for example, a portion about several millimeters from the upper end in the state of FIG. 1) are projected. The point is different. By this rotation, the upper ends of the branch pieces 104 and 114 are not able to resist the elongated hole 120a and bend in opposite directions.

  The foamable substrate 100 is rotated until at least the upper ends of the branch pieces 104 and 114 come out of the insertion hole 120. After the upper ends of the branch pieces 104 and 114 are thus removed from the insertion hole 120, the branch pieces 104 and 114 are slightly bent in directions opposite to each other. When the foamable base material 100 is pulled back upward (in the direction of arrow D12 in FIG. 5) in such a state that it is easily bent, the branch pieces 104 and 114 can be easily expanded in the expanding direction (this example) as shown in FIG. Is deformed in the horizontal direction). Thereafter, the work may be performed in the same procedure as in the first embodiment. Therefore, the foamable base material 100 can be locked to the reinforcement panel 118 in a state where the branch pieces 104 and 114 are deformed in the expanding direction also by the attachment method of this embodiment.

[Embodiment 2]
Embodiment 2 is an example in which substantially the entire first base material portion and second base material portion are deformed when attached to a hollow structure, and will be described with reference to FIGS. 17 to 21. In FIG. 17, the structural example of a foamable base material is represented with a perspective view. 18 and 20 are sectional views showing the process of attaching the foamable base material. FIG. 19 is a plan view showing an example of the insertion hole. In FIG. 21, the foamable base material after attaching to a hollow structure is represented with sectional drawing. In addition, about the element represented to these figures, the same code | symbol is attached | subjected to the element same as the element used in Embodiment 1, and description is abbreviate | omitted.

  In the foamable base material 200 shown in FIG. 17, the first base material portion 208, the locking portion 204, the second base material portion 210, and the like are integrally formed. The foamable substrate 200 is obtained by cutting a member formed by, for example, extrusion molding or injection molding. The first base material portion 208 has an opening hole 202 that penetrates between the side surfaces, and the second base material portion 210 also has an opening hole 206. The first base material portion 208 and the second base material portion 210 correspond to deformation portions. The locking portion 204 is formed between the first base material portion 208 and the second base material portion 210, and is realized by, for example, a pair of upper and lower protrusions (in other words, convex portions) formed in a horizontally long shape.

  An example in which the foamable base material 200 configured as described above is attached to a hollow structure will be described below. First, as shown in FIG. 18, the reinforcement panel 118 is provided with an insertion hole 212 for inserting the foamable substrate 200. Any shape can be applied to the insertion hole 212 as long as the foamable base material 200 passes therethrough. For example, a rectangular hole as shown in FIG. 19 is applicable.

  Returning to FIG. 18, the operator holds the foamable substrate 200 and attaches it to the reinforcement panel 118 according to the following procedure. That is, the foamable substrate 200 is inserted into the insertion hole 120 from one side of the reinforcement panel 118 toward the other side (in the direction of arrow D20 from the upper side to the lower side in this example). When this insertion is continued, a part of the locking part 204 passes through the insertion hole 212 while being elastically deformed, and the locking part 204 locks the foamable substrate 200 so as to be sandwiched from above and below the reinforcement panel 118. . In this state, when the reinforcement panel 118 is pressed toward the outer panel 126 (that is, in the direction of the arrow D20), the second base material portion 210 is expanded together with the opening hole 206 as shown in FIG. Deforms horizontally. In this manner, with the reinforcement panel 118 pressed against the outer panel 126, both ends and the like (the left and right ends in the example of FIG. 20) are aligned and welded.

  Thereafter, when the inner panel 122 is pressed toward the reinforcement panel 118 (that is, in the direction of the arrow D22), the state shown in FIG. 21 is obtained. In the example illustrated in FIG. 21, the first base member 208 is deformed into a ring shape together with the opening hole 202 by pressing the inner panel 122, but may be deformed into other shapes. Therefore, it can be said that the first base material portion 208 exists in one partition space 128 and the second base material portion 210 exists in the other partition space 134.

  According to the second embodiment described above, the reinforcement panel 118 is provided with the insertion holes 212 for inserting the foamable substrate 200 (see FIG. 19). The foamable base material 200 was configured to include a locking portion 204 between the first base material portion 208 and the second base material portion 210 (see FIGS. 17 and 18). The foamable substrate 200 is locked to the reinforcement panel 118 in a state of being inserted into the insertion hole 212 by the locking portion 204 provided in the foamable substrate 200 (see FIG. 18). The 1st base material part 208 and the 2nd base material part 210 with which the foamable base material 200 was equipped were formed so that a deformation | transformation was possible in the expansion direction within the corresponding division space 128,134, respectively (refer FIG. 20, FIG. 21). ). According to this configuration, the number of parts is reduced as compared with the prior art that is arranged for each partitioned space (the partitioned spaces 128 and 134 in the example of FIG. 21). The foamable substrate 200 also has a locking portion 204 that locks itself to the reinforcement panel 118. Compared with the prior art that required the operation of disposing the foamable base material 200 for each of the partition spaces 128 and 134 by the engaging portion 204, it is only necessary to perform one mounting operation, thereby reducing the work time. it can.

  Also, a step of locking the foamable substrate 200 to the reinforcement panel 118 (locking step), a step of deforming the first base material portion 208 and the second base material portion 210 in the expanding direction (deformation step), The foamable substrate 200 can be easily attached to the hollow structure 124 simply by performing the above. As described above, since one foaming substrate 200 needs only to be attached once, the working time can be shortened.

[Another embodiment according to the second embodiment]
Embodiment 2 mentioned above demonstrated the example which deform | transforms the 1st base material part 208 and the 2nd base material part 210 with which the foamable base material 200 was equipped. Other forms can be realized to realize such a modification, and an example thereof will be described with reference to FIGS.

  A flat molded member is molded in the same manner as the molding method (that is, injection molding, extrusion molding, etc.) of the foamable substrate 200 shown in FIGS. Then, when the said shaping | molding member is cut by a predetermined vertical and horizontal dimension, it will become the shaping | molding member 220 as shown in FIG. The molding member 220 has a slit-like cut 222 along the longitudinal direction. The notch 222 may be formed when the molded member is molded, or may be formed using a tool such as a cutter after molding.

  Except for the central portion (length L6) and both end portions (lengths L2, L10) in the longitudinal direction of the molded member 220, the notches 222 form a plurality of lengths L4 and L8, respectively. These lengths L2, L4, L6, L8, and L10 can be appropriately set according to the height, width, volume, and the like of the partition spaces 128 and 134. In the example of FIG. 22, L2 (≈L6≈L10) <L4 (≈L8) is set. Then, when the short piece of the molded member 220 is rounded as shown by an arrow D24 and formed into a cylindrical shape (for example, welding or adhesion), a foamable base material 224 as shown in FIG. 23 is obtained.

  The foamable base material 224 shown in FIG. 23 is a cylinder having a diameter R2, and has a notch 222 in the longitudinal direction (vertical direction in FIG. 23). By forming the slit-shaped cuts 222 along the longitudinal direction of the foamable substrate 200 in this way, it is easier to bend and deform than a flat foamed substrate without the cuts 222. Therefore, the foamable substrate 200 can be easily deformed in the expanding direction by simply applying pressure to the longitudinal direction of the foamable substrate 200.

  Since the foamable base material 224 does not have a portion corresponding to the locking portion 204 provided in the foamable base material 200, the same attachment as the foamable base material 200 described in the second embodiment cannot be performed. Therefore, an insertion hole 226 having the same diameter R2 as that of the foamable base material 224 or slightly smaller is opened in the reinforcement panel 118, and the foamable base material 224 is inserted into the insertion hole 226 while being elastically deformed. In other words, the foamable substrate 224 is locked to the reinforcement panel 118 by press-fitting. And it presses against the foamable base material 224 engaged with the reinforcement panel 118 so as to be sandwiched between the inner panel 122 and the outer panel 126 from above and below.

The foamed base material 224 that has been pressed is deformed in the expanding direction (in this example, the left-right direction), as in the example shown in FIG. 24. Moreover, the foamable base material 224 in an attached state integrally forms a first base material portion 228 existing in one partition space 128 and a second base material portion 230 existing in the other partition space 134. It can be said. Therefore, even in the attachment method of the present embodiment, the foamable base material 224 is attached to the reinforcement panel 118 in a state where a part of the foamable base material 224 (that is, the portion where the notch 222 is inserted) is deformed in the expanding direction. Be locked. Therefore, even in this embodiment, the same operational effects as those in Embodiment 2 can be obtained.
If the locking portion 106 shown in FIG. 1 and the locking portion 204 shown in FIGS. 17 and 18 are formed on the foamable base material 224 (the molding member 220 at the time of molding). Thus, the foamable substrate 224 can be more securely locked to the reinforcement panel 118.

[Embodiment 3]
The third embodiment is an example in which the first base material portion and the second base material portion are configured in different forms, and will be described with reference to FIGS. 25 and 27 are sectional views showing the process of attaching the foamable base material. FIG. 26 is a plan view showing an example of the insertion hole group. FIG. 28 shows a cross-sectional view of the foamable substrate after being attached to the hollow structure. In addition, about the element represented to these figures, the same code | symbol is attached | subjected to the element same as the element used in Embodiment 1, and description is abbreviate | omitted.

  In the foamable base material 300 shown in FIG. 25, the first base material portion 310, the locking piece 304, the second base material portion 312 and the like are integrally formed. The foamable substrate 300 is obtained by cutting a member formed by, for example, extrusion molding or injection molding, as in the first and second embodiments. In FIG. 25, the appearance seen from the side surface of the foamable substrate 300 is shown, but as a whole, it looks like the foamable substrate 200 shown in FIG. The 1st base material part 310 has the opening hole 302 penetrated between the side surfaces. The 2nd base material part 312 is cut and formed in the shape of an octopus leg (plural pieces), and the latching piece 304 is provided in the one part leg | foot. The locking piece 304 is realized by, for example, a protrusion such as a convex portion 158 shown in FIG. In addition, the 2nd base material part 312 is corresponded to a deformation | transformation part.

  An example in which the foamable base material 300 configured as described above is attached to a hollow structure will be described below. First, as shown in FIG. 26, the reinforcement panel 118 is provided with an insertion hole group 306 and an insertion hole 314 for inserting the second base material portion 312. The insertion hole group 306 includes a predetermined number (four in this example) of holes, and each hole has a structure in which a guide piece 308 is connected (see FIG. 25). The guide piece 308 corresponding to the guide portion plays a role of guiding the second base material portion 312 in the expanding direction. Any shape can be applied to the insertion hole 314 as long as the foot portion 312a provided with the locking piece 304 passes through, for example, a hole having a circular shape as shown in FIG.

  The operator holds the first base member 310 and attaches it to the reinforcement panel 118 as shown in FIG. That is, from one side of the reinforcement panel 118 toward the other side (in the direction of arrow D30 from the upper side to the lower side in this example), the second base material portion 312 is moved into the insertion hole group 306 and the insertion hole 314. Insert each one. When this insertion is continued, the locking piece 304 provided on the foot portion 312a is elastically deformed and caught through the insertion hole 314, and the second base material portion 312 excluding the foot portion 312a is expanded by the guide piece 308. Guided in the direction (in this example, left-right direction). At this time, since the second base material portion 312 excluding the foot portion 312a is bent in the expanding direction, a restoring force that tries to return to the state before deformation (that is, the state shown in FIG. 25) acts. Since this restoring force is a force that causes the foamable base material 300 to escape upward, the second base material portion 312 and the locking piece 304 constitute a locking portion. Therefore, the foamable substrate 300 can be reliably locked to the reinforcement panel 118.

  Thereafter, when the inner panel 122 is pressed toward the reinforcement panel 118 (that is, in the direction of the arrow D32), the state shown in FIG. 29 is obtained. In the example shown in FIG. 29, the first base material portion 310 is deformed into a ring shape together with the opening hole 302 by pressing the inner panel 122, but may be deformed into other shapes. In addition, the first base material portion 310 exists in one of the partition spaces 128, and the second base material portion 312 exists in the other partition space 134.

According to Embodiment 3 described above, the following effects can be obtained.
(B1) The reinforcement panel 118 includes a guide piece 308 that guides the second base material portion 312 in order to be deformed in the expanding direction (see FIGS. 25 and 27). When the second base material portion 312 is passed through the guide piece 308, the second base material portion 312 is guided to be deformed in the expanding direction. Thus, since the direction in which the guide piece 308 is deformed can be regulated, for example, when the partition space 134 is an elongated space, the second base material portion 312 can be deformed in the elongated direction. . Therefore, by forming the guide piece 308 in an appropriate shape and direction, it is possible to reduce the occurrence of unfoamed portions in the partition space 134.

(B2) Although the 2nd base material part 312 was cut and formed in the shape of an octopus foot (plural pieces), if it changes the way of viewing, it can be said that it is the site | part which formed the slit-shaped cut along the longitudinal direction of the foamable base material 300 ( (See FIGS. 25 and 27). As described above, the second base material portion 312 formed of a slit-like cut is easily bent and deformed as compared to a flat plate without a cut. Therefore, the second base material portion 312 can be easily deformed in the expanding direction only by applying pressure (pressing) to the foamable base material 300.
(B3) Other requirements, configurations, operations, and the like are the same as those of the first embodiment, and thus the same effects as those of the first embodiment can be obtained {see the above-described items (a1) to (a3)}.

[Another embodiment according to the third embodiment]
In the third embodiment described above, the example in which the second base material portion 312 is guided by the guide piece 308 provided in the reinforcement panel 118 has been described. Such a modification can be realized in other forms, and an example thereof will be described with reference to FIGS.

  In the third embodiment, the guide piece 308 is formed integrally with the reinforcement panel 118, but in this embodiment, a guide clip 328 manufactured separately is attached to the reinforcement panel 118 as shown in FIG. The guide clip 328 has a through hole 328a and a guide surface 328b. The through hole 328a is a hole penetrating in the longitudinal direction (vertical direction in FIG. 29), and has a step in the middle. The guide surface 328b corresponding to the guide portion plays a role of guiding the second base material portion 332 in the expanding direction.

  The foamable substrate 320 used in this embodiment has a structure similar to the foamable substrate 300 used in Embodiment 3. That is, the 1st base material part 330, the 2nd base material part 332, the locking piece 324, etc. are integrally formed. The manufacturing method and appearance of the foamable base material 320 are the same as those of the foamable base material 300 except that the locking piece 324 is formed instead of the locking piece 304. The 1st base material part 330 has the opening hole 322 penetrated between the side surfaces. The second base material portion 332 is formed by cutting into an octopus foot shape (plural pieces). The second base material portion 332 corresponds to a deformed portion. Since the locking piece 324 is hooked on the step portion of the above-described through hole 328a to be locked, any structure that can be hooked on the step portion may be used. For example, this is realized by an arrow-shaped protrusion as shown in FIG.

  The example which attaches the foamable base material 320 comprised as mentioned above to a hollow structure is demonstrated below. First, as shown in FIG. 29, not only the above-described guide clip 328 is attached to the reinforcement panel 118, but also an insertion hole group 326 for inserting the second base material portion 332 is formed. The insertion hole group 326 includes a predetermined number (two in this example) of holes. Any shape can be applied to the insertion hole group 326 as long as the second base material portion 332 passes through, for example, a hole having the same shape as the insertion hole group 306 shown in FIG.

  The operator holds the first base member 330 and attaches it to the reinforcement panel 118 as shown in FIG. That is, the second base material portion 332 is inserted into the insertion hole group 326 from one side of the reinforcement panel 118 toward the other side (in the direction of arrow D36 from the upper side to the lower side in this example). When this insertion is continued, the locking piece 324 passes through the through-hole 328a while being elastically deformed and is caught by the stepped portion, and the second base material portion 332 is expanded in the expanding direction (in this example, the left-right direction) by the guide surface 328b. Guided. At this time, the second base material portion 332 has a restoring force similar to that of the second base material portion 312 shown in FIG. 27, so that the second base material portion 332 constitutes a locking portion together with the locking piece 324. Therefore, the foamable substrate 320 can be reliably locked to the reinforcement panel 118.

  Thereafter, when the inner panel 122 is pressed toward the reinforcement panel 118 (that is, in the direction of the arrow D38), the state shown in FIG. 31 is obtained. In the example shown in FIG. 31, the first base material portion 330 is deformed into a ring shape together with the opening hole 322 by pressing of the inner panel 122, but may be deformed into other shapes. In addition, the first base material portion 330 exists in one partition space 128, and the second base material portion 332 exists in the other partition space 134. Therefore, even in this embodiment, the same effect as that in Embodiment 3 can be obtained.

[Embodiment 4]
The fourth embodiment is an example in which the deformation modes of the first base material portion and the second base material portion are different from each other as in the third embodiment described above. This is different in that it can be applied even when the guide clip 328) is not provided.
The fourth embodiment will be described with reference to FIGS. FIG. 32 shows an example of a molded member in a plan view. 33 and 34 are sectional views showing the process of attaching the foamable base material. In addition, about the element represented to these figures, the same code | symbol is attached | subjected to the element same as the element used in Embodiment 1, and description is abbreviate | omitted.

  A molded member 400 shown in FIG. 32 is a plan view of a foamable base material formed by injection molding, extrusion molding, or the like. The molded member 400 includes a cut portion 402 having a plurality of cuts 406, a non-cut portion 404 having no cuts 406, and the like. Regarding the length in the vertical direction, the cut portion 402 is longer than the non-cut portion 404 by the amount having the cut 406. However, the cut portion 402 has a portion where there is no cut 406 by a length L12 from the lower end of the non-cut portion 404 in the vertical direction. This portion corresponds to a locking portion 412 that locks the foamable base material 408 to the reinforcement panel 118 (see FIG. 33). If the molded member 400 having such a structure is wound as indicated by an arrow D40 so that the left side is the inside, and fixed by welding, adhesion, or the like, a foamable substrate 408 as shown in FIG. 33 can be formed.

  A foamable base material 408 shown in FIG. 33 includes a first base material portion 410, a locking portion 412, a second base material portion 414, and the like. The first base portion 410 corresponds to a common portion between the above-described cut portion 402 and the non-cut portion 404. The locking portion 412 corresponds to a portion having a length L12 in the vertical width in the cut portion 402. The locking portion 412 has a diameter R4 as shown in the figure, but its horizontal cross section may be circular or spiral or roll. The second base material portion 414 corresponding to the deformable portion corresponds to a large number of foot portions formed by slit-shaped cuts 406.

  An example in which the foamable base material 408 configured as described above is attached to a hollow structure will be described below. As shown in FIG. 33, the reinforcement panel 118 has an insertion hole 416. As long as the second base material portion 414 passes through the insertion hole 416 and the foamable base material 408 can be locked by the locking portion 412, any hole shape (for example, a circular shape or a polygonal shape) may be applied. In this example, since the locking portion 412 has a circular shape with a diameter R4, it is desirable to form it with a diameter that is the same as or slightly smaller than the diameter R4.

  The operator holds the first base material portion 410 and then moves from the one side of the reinforcement panel 118 toward the other side (in this example, in the direction of the arrow D42 from the upper side to the lower side), and then the second base material portion 414. Is inserted into the insertion hole 416 up to the locking portion 412 first. When the locking portion 412 is pushed into the insertion hole 416 after the second base material portion 414 has passed through the insertion hole 416, the locking portion 412 enters the insertion hole 416 while being elastically deformed. As shown in FIG. 33, since there is a step between the locking portion 412 and the first base material portion 410, the first base material portion 410 serves as a stopper. The elastically deformed locking portion 412 presses the insertion hole 416 to return to the original state, and this pressing force becomes a force for locking the foamable substrate 408 to the reinforcement panel 118. Therefore, the foamable substrate 408 can be reliably locked to the reinforcement panel 118.

  After the foamable substrate 408 is locked to the reinforcement panel 118, the ends of the reinforcement panel 118, the inner panel 122, and the outer panel 126 (the left and right ends in the example of FIG. 34) are fixed by welding or the like. And the hollow structure 124 is comprised. In this case, the order of fixing is arbitrary. In this fixing operation, in the space surrounded by the reinforcement panel 118 and the outer panel 126 (that is, the partition space 134), the second base material portion 414 hits the outer panel 126 and deforms in the expanding direction (in this example, the left-right direction). . When heated after forming the hollow structure 124, the foamable substrate 408 foams, and the internal space of the hollow structure 124 can be filled with the foam 136 as shown in FIG. 7.

According to the fourth embodiment described above, the following effects can be obtained.
(C1) The 2nd base material part 414 represented in FIG. 33 consists of the site | part (octopus-like leg part) which formed the some slit-shaped cut along the longitudinal direction of the foamable base material 408. As shown in FIG. The part is easily bent and easily deformed as compared to a flat plate without a cut. Therefore, the second base material portion 414 can be easily deformed in the expanding direction. It should be noted that a single slit-like cut is the same.
If the foamable substrate 408 can be reliably locked to the reinforcement panel 118 by the locking portion 412, the non-cut portion 404 shown in FIG. 32 may be eliminated. In this case, the foamable substrate 408 has a structure in which the cut portion 402 is rolled and fixed. Even with this structure, the second base material portion 414 is easily bent and easily deformed, so that the same effects as those of the fourth embodiment are obtained.
(C2) Other requirements, configurations, operations, and the like are the same as those of the first embodiment, and therefore, the same effects as those of the first embodiment can be obtained {see the above-described items (a1) to (a3)}.

[Another embodiment according to the fourth embodiment]
Embodiment 4 mentioned above demonstrated the example which deform | transforms the 2nd base material part 414 with which the foamable base material 408 was equipped. Such a modification can be realized in other forms, and an example thereof will be described with reference to FIGS. FIG. 35 is a plan view showing an example of the molded member. FIG. 36 shows a process of forming a foamable substrate. 37 and 38 show examples of the structure of the foamable substrate. 39 and 40 are sectional views showing the process of attaching the foamable base material. In FIG. 41, the foamable base material after attaching to a hollow structure is represented with sectional drawing. In addition, about the element represented to these figures, the same code | symbol is attached | subjected to the element same as the element used in Embodiment 1, and description is abbreviate | omitted.

  In the fourth embodiment, the second base material portion 414 has a simple foot portion formed by the cut 406, but in this embodiment, each foot portion is formed in a ring shape. First, as shown in FIG. 35, a molding member 420 is molded by injection molding, extrusion molding, or the like. The molded member 420 has a plurality of cuts 422 (in this example) in the longitudinal direction, except for a length L14 at one end (left side in this example) and a length L20 at the other side (right side in this example). Length L16 + L18). These lengths L14, L16, L18, and L20 can be appropriately set according to the height, width, volume, and the like of the partition spaces 128 and 134. In the example of FIG. 35, the length is set such that the relationship of L16 (≈L18)> L14> L20 is established. A concave portion 424 is formed in the substantially central portion of the notch 422 and on one side of the molding member 420 for easy folding. In the example shown in FIG. 36, a concave portion 424 having a triangular cross section is formed on the lower surface side.

  An example of forming a foamable substrate will be described. In FIG. 36, first, the molding member 420 is folded in two as indicated by an arrow D44 so that the concave portion 424 of the molding member 420 becomes a fold. Next, it is rounded as shown by an arrow D46 in the half-folded state, and is fastened so as to form a cylinder by welding or bonding, for example. That is, when the part (the part of length L18 + L20) overlapped on the upper side in FIG. 36 is fastened, the foamable base material 426 as shown in FIG. 37 is obtained.

  The cylindrical foamable base material 426 includes an inner cylinder part 428 and an outer cylinder part 430. The inner cylinder part 428 protrudes longer than the outer cylinder part 430 (by L14-L20). When the inner cylinder part 428 is pushed downward (in the direction of arrow D48) while holding the outer cylinder part 430, the foot part 430b forming the outer cylinder part 430 in the radial direction (that is, the expanding direction) as shown in FIG. spread. The outer cylinder portion 430 is formed of a large number of foot portions 430b that are ring-shaped and can be expanded in the radial direction, and locking portions 430a for locking the foamable base material 426 itself to the reinforcement panel 118. The foot part 430b corresponds to a deformed part.

  An example in which the foamable base material 426 configured as described above is attached to a hollow structure will be described below. First, as shown in FIG. 39, a plug-in hole 432 is formed in the reinforcement panel 118. Any hole shape (for example, circular shape or polygonal shape) may be applied to the insertion hole 432 as long as the foot portion 430b passes and the foamable base material 426 can be locked by the locking portion 430a. In this example, since the locking portion 430a has a circular shape with a diameter R6, it is desirable to form the locking portion 430a with the same or slightly smaller diameter as the diameter R6.

  The worker holds the inner cylinder part 428, the outer cylinder part 430, etc., and then engages the foot part 430b first from the one side of the reinforcement panel 118 to the other side (in this example, from the upper side to the lower side). Insert into the insertion hole 432 up to the stop 430a. When the locking portion 430a is pushed into the insertion hole 432 after the foot portion 430b has passed through the insertion hole 432, the locking portion 430a enters the insertion hole 432 while being elastically deformed. The elastically deformed locking portion 430a presses the insertion hole 432 to return to the original state, and this pressing force becomes a force for locking the foamable base material 426 to the reinforcement panel 118. Therefore, the foamable substrate 426 can be reliably locked to the reinforcement panel 118.

  After the foamable substrate 426 is locked to the reinforcement panel 118, the reinforcement panel 118 is fixed by welding or the like at the end of the outer panel 126. An example of this state is shown in FIG. The foamable base material 426 shown in FIG. 40 is in the same state (posture) as FIG. Subsequently, when the inner panel 122 is fixed to the reinforcement panel 118 by welding or the like, the inner panel 122 pushes the inner cylinder portion 428 downward (in the direction of arrow D50 in this example), so that the foot portion 430b is It strikes the outer panel 126 and deforms in the expanding direction (in this example, the left-right direction). By fixing the reinforcement panel 118, the inner panel 122, and the outer panel 126 in this way, a hollow structure 124 as shown in FIG. 41 is configured.

  In FIG. 41, the foamable base material 426 attached to the hollow structure 124 is formed by integrating the first base material portion 434 existing in one partition space 128 and the second base material portion 436 present in the other partition space 134. It can be said that it has formed. When the hollow structure 124 is heated after being formed, the foamable base material 426 foams, and the internal space of the hollow structure 124 can be filled with the foam 136 as shown in FIG. Therefore, even in the present embodiment, the same function and effect as in the fourth embodiment can be obtained.

[Embodiment 5]
The fifth embodiment is an example in which a locking portion is provided on the intermediate panel side (that is, the reinforcement panel 118), and will be described with reference to FIGS. FIG. 42 is a plan view showing an example of the insertion hole. 43 and 44 are sectional views showing the process of attaching the foamable base material. In addition, about the element represented to these figures, the same code | symbol is attached | subjected to the element same as the element used in Embodiment 1, and description is abbreviate | omitted.

  The latching part of this form is implement | achieved as a part of insertion hole 121 for inserting a foamable base material. That is, as shown in FIG. 42, the insertion hole 121 includes a long hole 120a for inserting the foamable substrate 100 and a locking portion 120c that locks by rotating the base body 102 (see FIG. 43). . The locking portion 120c is formed in a circular shape, but has a curved shape because there is a portion common to the elongated hole 120a. However, although it is circular, as shown in the figure, the diameter R8 (represented by a solid line and a two-dot chain line) and the diameter R10 on the other side (R8> R10 in this example) are changed to be small. I am letting. In other words, the diameter is tapered. Accordingly, the base body 102 can be inserted with almost no resistance at the portion of the diameter R8, but when it is rotated toward the portion of the diameter R10 (in the counterclockwise arrow D52 direction in FIG. 42), the locking portion 120c sandwiches the base body 102. To lock and fix.

  The operator holds the base 102 and attaches the foamable substrate 100 to the reinforcement panel 118 according to the following procedure. The foamable substrate 100 is formed with substantially the same structure as that of the first embodiment, except that the locking portion 106 is not provided. As shown in FIG. 43, the foamable base material 100 is inserted from the upper side of the reinforcement panel 118 downward (that is, in the direction of arrow D54) until the branch pieces 104 and 114 come out from the lower surface of the reinforcement panel 118. Insert into hole 121. Subsequently, the foamable substrate 100 is pulled back so that the upper ends (that is, the tip portions) of the branch pieces 104 and 114 are brought into contact with the lower surface of the reinforcement panel 118.

  Next, with the upper ends of the branch pieces 104 and 114 in contact with the lower surface of the reinforcement panel 118, the foamable substrate 100 is pulled back while rotating as shown in FIG. 44 (that is, in the direction of arrow D56). Since the frictional resistance is generated between the branch pieces 104 and 114 and the reinforcement panel 118 by the rotation operation, it is the same as in the first embodiment, and therefore the branch pieces 104 and 114 are easily bent in the opposite directions. Further, when the foamable base material 100 that is in a state of being easily bent is pulled back upward, the branch pieces 104 and 114 are easily deformed in the expanding direction (in this example, the left-right direction). Furthermore, when the foamable substrate 100 continues to rotate and retract, the diameter (width) of the locking portion 120c becomes smaller than the width of the base body 102, and can be sandwiched and fixed. Thus, the foamable substrate 100 can be locked to the reinforcement panel 118 in a state where the branch pieces 104 and 114 are deformed in the expanding direction. As shown in FIG. 44, when the foamable base material 100 locked to the reinforcement panel 118 is pressed between the inner panel 122 and the outer panel 126 from above and below, the state shown in FIG. 6 is obtained. .

According to the fifth embodiment described above, the following effects can be obtained.
(D1) The reinforcement panel 118 is provided with a locking portion 120c for locking the foamable substrate 100 to the reinforcement panel 118 (see FIG. 42). The foamable base material 100 was configured to include a first base material portion 130 and a second base material portion 132 (see FIGS. 43 and 6). The branch pieces 104 and 114 provided in the foamable base material 100 are formed so that the first base material portion 130 and the second base material portion 132 can be deformed in the expanding direction within the corresponding partition spaces 128 and 134 (FIG. 43, see FIG. According to this configuration, the number of parts is reduced as compared with the prior art that is provided for each partitioned space (the partitioned spaces 128 and 134 in the example of FIG. 6). Compared to the prior art that required the work of disposing the foamable base material 100 for each of the partition spaces 128 and 134, the work time can be shortened because only one mounting work can be performed by the locking portion 120c.

(D2) Since other requirements, configurations, operations, and the like are the same as those in the first embodiment, the same effects as those in the first embodiment can be obtained {see the above items (a1) to (a3)}.
In addition, although this form was applied to the foamable base material and insertion hole which were used in Embodiment 1, it is similarly applied to the foamable base material and insertion hole which were used in Embodiment 2, 3 and 4, respectively. Is possible. Further, not only the configuration in which the locking portion 120c is directly provided on the reinforcement panel 118, but also the locking portion as an attachment such as the guide clip 328 used in the third embodiment is indirectly provided on the reinforcement panel 118. It is good also as a form.

[Other Embodiments]
As mentioned above, although the best form for implementing this invention was demonstrated, this invention is not limited to each embodiment at all. In other words, the present invention can be implemented in various forms without departing from the gist of the present invention. For example, the following forms may be realized.

(E1) In the first embodiment, the foamable substrate 100 is formed by forming the base 102 and the branch pieces 104 and 114 in the same plate shape (see FIG. 1), and the foamable base 150 is the base 152 The branch pieces 156 and 160 were formed in the same plate shape (see FIG. 10). Instead of this form, a foamable base material composed of a base body and branch pieces in which the shape of the insertion hole 120 shown in FIG. 4 has a cross-sectional shape may be formed. For example, the foamable substrate 500 shown in FIG. 45 is an alternative to the foamable substrate 150, and is formed of plate-like branch pieces 156 and 160 and a columnar substrate 502. The base body 502 has an opening hole 164 as in the first embodiment. Even when formed in different shapes in this way, the number of parts is reduced and the work time can be shortened because only one mounting operation is required.

(E2) In the third embodiment, the insertion hole group 306 including four holes and the insertion hole 314 including one hole are formed in the reinforcement panel 118 (see FIG. 26). Instead of this form, the insertion hole group 306 including two or more holes (excluding four holes) may be provided in the reinforcement panel 118. For example, the insertion hole group 306 shown in FIGS. 46 and 47 includes two holes, and each hole has a structure in which a guide piece 308 is connected. However, the shape of the hole seen in a plane is a quadrangular shape, which is different from the example of FIG. Thus, since it can apply regardless of the number of holes, the same effect as Embodiment 3 can be obtained. The number and shape of the insertion holes 314 are the same, and may be formed with other numbers (two or more) or other shapes (such as a square shape or a circular shape).

(E3) In the first to fifth embodiments, a foamable base material (for example, foamable base materials 100, 150, 200, 224, 300, 320, 408, 426, etc.) is directly attached to the reinforcement panel 118 ( (See FIG. 6, FIG. 15, FIG. 21, FIG. 24, FIG. 28, FIG. 31, FIG. 34, FIG. 41). Instead of this form, a structure in which the protector is included in the foamable base material may be used. For example, the structure embedded in an opening hole (108,110,112,116,164,202,206,302,322) etc. corresponds. In addition, when enclosing in the site | part corresponded to a deformation | transformation part among foamable base materials, it is necessary to comprise a protector with the raw material which has elasticity more than equivalent to a foamable base material. Thus, even when it is set as the structure which encloses a protector, since a deformation | transformation part can be deform | transformed in an expansion direction, the effect equivalent to Embodiment 1-4 can be obtained.

(E4) In the first to fifth embodiments, one foamable base material (for example, the foamable base material 100, 150, 200, 224, 300, 320, 408, 426, etc.) is provided at the substantially central portion of the reinforcement panel 118. The mounting structure was adopted (see FIGS. 6, 15, 21, 24, 28, 31, 34, and 41). Instead of this form, it is possible to adopt a structure in which the foamable base material is attached to other parts except for the central part, depending on the internal structure of the hollow structure 124. It is good also as a structure which attaches a foaming base material. In this way, by appropriately disposing the foamable base material so as to match the internal structure of the hollow structure 124, the internal space of the hollow structure 124 can be filled with the foam 136 without any gap as shown in FIG. it can.

(E5) In the first embodiment, a part of the base 102 constituting the foamable substrate 100 is deformed (see FIG. 6), and a part of the base 152 constituting the foamable base 150 is deformed ( (See FIG. 15). In Embodiment 2, the 1st base material part 208 which comprises the foamable base material 200 was deform | transformed (refer FIG. 24). In the third embodiment, the first base material part 310 constituting the foamable base material 300 is deformed (see FIG. 28), and the first base material part 330 constituting the foamable base material 320 is deformed (see FIG. 28). 31). It may replace with this form and may form the deformation part mentioned above in the shape after modification from the beginning. For example, the base 102 shown in FIG. 6 is formed in a ring shape from the beginning together with the opening hole 116. In this way, when assembling the hollow structure 124, a force for deforming the base body 102 and the like becomes unnecessary, and the assembling time can be shortened.

(E6) In the fifth embodiment, the insertion hole 121 provided in the reinforcement panel 118 has a shape that changes the diameter of the locking portion 120c (see FIG. 42). Instead of this form, the reinforcement panel 118 may be provided with another shape capable of locking the foamable base material. Examples of realizing the other shapes will be described below with reference to FIGS. 48 to 53.

(Example 1)
The insertion hole 504 shown in a plan view in FIG. 48 is similar to the insertion hole 120 shown in FIG. 4 in that it has a long hole 120a and a bending portion 120b. The point prepared for is different. The protruding portion 120d corresponding to the locking portion has a structure that protrudes in the planar direction and has a pointed tip like a needle. According to this embodiment, when the foamable base material is inserted into the insertion hole 504 and then rotated, it is stuck in the protrusion 120d. Therefore, the foamable base material can be locked to the reinforcement panel 118. The insertion hole 504 can be applied in place of the insertion hole used in the first, second, third, and fifth embodiments.

(Example 2)
The insertion hole 506 shown in a plan view in FIG. 49 is formed as a hole opened in a chrysanthemum shape. In other words, it is a shape in which a plurality of planar projections (four pieces in this example) are provided from the periphery of the circular opening hole toward the center of the circle. Since the foamable substrate has a certain elasticity due to its properties, the protruding portion is locked by pressing the foamable substrate. With this function, the insertion hole 506 also serves as a locking portion. According to this embodiment, the foamable base material can be locked to the reinforcement panel 118 simply by inserting it into the insertion hole 506.
The insertion hole 506 can be applied in place of the insertion hole used in the first, second, third, and fifth embodiments. The number of protrusions forming the chrysanthemum is not limited to four pieces in this example, but may be one piece (single piece) or two pieces or more, and may be an appropriate number according to the material or shape of the foamable substrate. .

(Example 3)
The insertion hole 508 shown in FIGS. 50 to 53 includes an upright portion 510 at the peripheral edge of the insertion hole 508. The upright portion 510 corresponding to the locking portion has a structure in which an arrow-shaped protrusion is formed inside the insertion hole 508 by punching or the like (see FIG. 50), and is cut and raised from the reinforcement panel 118 in a substantially vertical direction. (See FIG. 51). For example, the foamable base material 408 shown in FIG. 32, FIG. 33, etc. has the 1st base material part 410 wound in roll shape. Since the first base material portion 410 has a portion where the base material portions overlap each other, the foaming base material 408 is reinforced by inserting the upright portion 510 between the base material portions in the overlapping portion (in other words, between layers). The panel 118 can be locked. 52 (plan view) and FIG. 53 (sectional view) show the foamable base material 408 in a state of being locked to the reinforcement panel 118, respectively.
In this example, the standing portion 510 is formed in an arrow shape, but other shapes that can be locked by being inserted (or stabbed) into the foamable base material (for example, a sharp shape such as the protruding portion 120d shown in FIG. 48). Etc.). The number of the upright portions 510 is not limited to one as in this example, and a plurality of upright portions 510 may be provided on the peripheral portion of the insertion hole 508 (that is, on the peripheral portion or in the vicinity thereof). The insertion hole 508 can be applied instead of the insertion hole used in the fourth embodiment.

(E7) The first to fifth embodiments and the other embodiments described above can be applied to a vehicle pillar such as a center pillar or a front pillar of a vehicle body. The present invention can also be applied to other hollow structures in which a foamable substrate is foamed and filled in the internal space. The other hollow structure corresponds to, for example, a hollow columnar body or plate-like body that constitutes transportation equipment such as an aircraft or a ship, or a hollow columnar body or plate-like body related to civil engineering and building materials.

It is a perspective view showing the structural example of a foamable base material. It is a side view showing the structural example of a foamable base material. It is sectional drawing showing the attachment process of a foamable base material. It is a top view showing an example of an insertion hole. It is sectional drawing showing the attachment process following FIG. It is sectional drawing showing the foamable base material after attaching to a hollow structure. It is sectional drawing showing the hollow structure after foaming. It is a top view showing the example of shaping | molding of an extrusion molding member. It is a side view showing the example of shaping | molding of an extrusion molding member. It is a perspective view showing the structural example of a foamable base material. It is a side view showing the structural example of a foamable base material. It is sectional drawing showing the attachment process of a foamable base material. It is a top view showing an example of an insertion hole. It is sectional drawing showing the attachment process following FIG. It is sectional drawing showing the foamable base material after attaching to a hollow structure. It is sectional drawing showing an example of the shape which decenters the contact point with a reinforcement panel. It is a perspective view showing the structural example of a foamable base material. It is sectional drawing showing the attachment process of a foamable base material. It is sectional drawing showing the attachment process following FIG. It is a top view showing an example of an insertion hole. It is sectional drawing showing the foamable base material after attaching to a hollow structure. It is a top view showing an example of a forming member. It is a perspective view showing the structural example of a foamable base material. It is sectional drawing showing the foamable base material after attaching to a hollow structure. It is sectional drawing showing the attachment process of a foamable base material. It is a top view showing an example of an insertion hole group. It is sectional drawing showing the attachment process following FIG. It is sectional drawing showing the foamable base material after attaching to a hollow structure. It is sectional drawing showing the attachment process of a foamable base material. It is sectional drawing showing the attachment process following FIG. It is sectional drawing showing the foamable base material after attaching to a hollow structure. It is a top view showing an example of a forming member. It is sectional drawing showing the attachment process of a foamable base material. It is sectional drawing showing the attachment process following FIG. It is a top view showing an example of a forming member. It is a side view showing the process in which a foamable base material is formed. It is a perspective view showing the structural example of a foamable base material. It is a perspective view showing the structural example of a foamable base material. It is sectional drawing showing the attachment process of a foamable base material. It is sectional drawing showing the attachment process following FIG. It is sectional drawing showing the foamable base material after attaching to a hollow structure. It is a top view showing an example of an insertion hole. It is sectional drawing showing the attachment process of a foamable base material. FIG. 44 is a cross-sectional view illustrating an attachment process subsequent to FIG. 43. It is a perspective view showing the structural example of a foamable base material. It is a top view showing an example of an insertion hole. It is sectional drawing showing an example of an insertion hole. It is a top view showing an example of an insertion hole. It is a top view showing an example of an insertion hole. It is a top view showing an example of an insertion hole. It is a top view showing an example of an insertion hole. It is a top view showing the example which locked the foamable base material to the standing part. It is sectional drawing showing the example which locked the foamable base material to the standing part.

Explanation of symbols

DESCRIPTION OF SYMBOLS 100 Foamable base material 102 Base body 104,114 Branch piece (deformation part)
106 Locking portion 108, 110, 112, 116 Opening hole 118 Reinforce panel (intermediate panel)
120, 121 Insertion hole 120a Long hole 120b Bending part 120c Locking part 122 Inner panel (hollow structure)
124 Hollow structure 126 Outer panel (hollow structure)
128,134 Partition space 130 1st base material part 132 2nd base material part 136 Foam 140 Extrusion member 140a, 140b, 140c Cut 142 Locking part 150 Foamable base material 152 Base body 154, 162, 162a Inclined surface (contact) (Shapes with eccentric points)
156, 160 Branch piece 158 Convex 162b Curved surface (shape where the contact point is eccentric)
162c Protrusion (shape where the contact point is eccentric)
162d Convex surface (shape where the contact point is eccentric)
164 Opening hole 166 Insertion hole 168 1st base material part 170 2nd base material part 200 Foamable base material 202 Opening hole 204 Locking part 206 Opening hole 208 1st base material part (deformation part)
210 Second base material part (deformation part)
212 Insertion hole 220 Molding member 222 Notch 224 Foamable base material 226 Insertion hole 228 First base material portion 230 Second base material portion 300 Foamable base material 302 Opening hole 304 Locking piece 306 Insertion hole group 308 Guide piece (Guide part)
310 1st base material part 312 2nd base material part (deformation part)
312a Leg part 314 Insertion hole 320 Foamable base material 322 Opening hole 324 Locking piece 326 Insertion hole group 328 Guide clip 328a Through hole 328b Guide surface (guide part)
330 1st base material part 332 2nd base material part (deformation part)
400 molded member 402 notch part 404 non-notch part 406 notch 408 foamable base material 410 first base material part 412 locking part 414 second base material part (deformation part)
416 Insertion hole 420 Molding member 422 Notch 424 Concave part 426 Foamable base material 428 Inner cylinder part 430 Outer cylinder part 430a Locking part 430b Foot part (deformation part)
432 Insertion hole 434 1st base material part 436 2nd base material part 500 Foamable base material 502 Base 504, 506, 508 Insertion hole 510 Standing part (locking part)

Claims (9)

It is attached to a hollow structure having an intermediate panel, and is an attachment structure of a foamable base material that is foamed by heating and fills the space in the hollow structure,
The intermediate panel has an insertion hole for inserting the foamable base material,
The foamable base material includes a locking portion between the first base material portion and the second base material portion,
The locking portion locks the foamable base material in a state of being inserted into the insertion hole,
The first base material portion and the second base material portion are sites that exist for each partitioned space partitioned by the intermediate panel when each is locked by the locking portion,
At least one of the first base material portion and the second base material portion has a foamable base material mounting structure having a deformable portion that can be deformed in the expanding direction within the corresponding partition space. It is attached to a hollow structure having an intermediate panel, and is an attachment structure of a foamable base material that is foamed by heating and fills the space in the hollow structure,
The intermediate panel includes an insertion hole for inserting the foamable base material, and a locking portion for locking the foamable base material in a state of being inserted into the insertion hole,
The foamable base material includes a first base material portion and a second base material portion that are respectively present in each partition space partitioned by the intermediate panel when locked by the locking portion;
At least one of the first base material portion and the second base material portion has a foamable base material mounting structure having a deformable portion that can be deformed in the expanding direction within the corresponding partition space. The mounting structure for a foamable substrate according to claim 1 or 2,
The deformed portion is composed of branch pieces that are branched from a position at a predetermined distance from the end of the foamable base material.
After the foamable base material is inserted into the insertion hole and pulled back until the tip of the branch piece comes into contact with the intermediate panel, the foamable base material is further rotated and pulled back to thereby remove the branch piece. Attachment structure of foamable base material that is deformed in the expanding direction. The mounting structure for a foamable substrate according to claim 1 or 2,
The deformed portion is composed of branch pieces that are branched from a position at a predetermined distance from the end of the foamable base material.
The mounting structure of the foaming base material which made the said branch piece the shape which decenters the contact point which contacts an intermediate | middle panel when moving the foaming base material inserted in the insertion hole. The mounting structure for a foamable substrate according to claim 4,
The locking portion is locked by a convex portion provided on the foamable base material to be hooked on the intermediate panel and a restoring force that presses the intermediate panel so that the deformed portion deformed in the expanding direction returns to the state before the deformation. The mounting structure of the foaming base material made into the structure which performs this. The mounting structure for a foamable substrate according to claim 1 or 2,
The intermediate panel has a foamable base material mounting structure having a guide portion that guides the deformable portion in order to deform the intermediate panel in the expanding direction. The mounting structure for a foamable substrate according to claim 1 or 2,
The deformable portion is an attachment structure for a foamable base material, which is formed of a part where one or a plurality of slit-shaped cuts are formed along the longitudinal direction of the foamable base material. The mounting structure for a foamable substrate according to claim 1 or 2,
The foamable base material is a mounting structure for a foamable base material that is formed into a cylindrical shape by bending at a predetermined position of a deformed portion in which a slit-shaped cut is formed, and rolling and fastening in the folded state. Attaching to a hollow structure having an intermediate panel is a method of attaching a foamable base material that is foamed by heating to fill a space in the hollow structure,
The intermediate panel has an insertion hole for inserting the foamable base material,
The foamable base material is a partition space that is partitioned by the intermediate panel when the foamable base material is locked by the locking portion and a locking portion that locks the foamable base material in a state of being inserted into the insertion hole. After having a configuration consisting of a first base material portion and a second base material portion that are present every time,
A step of locking the foamable base material inserted into the insertion hole to the intermediate panel by a locking portion provided in the foamable base material;
When the foamable base material is locked to the intermediate panel, or before and after that, a deforming portion provided in at least one base material portion of the first base material portion and the second base material portion is in the expanding direction. A method for attaching a foamable base material, the method comprising:

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