JP4799131B2 - Expandable molded body and filler - Google Patents

Description

  The present invention relates to an expandable molded body for forming an expandable member provided in a filler, and a filler.

In a hollow structure represented by a vehicle pillar or the like, if a problem such as insufficient strength or rigidity occurs or abnormal noise occurs due to the flow of air in the hollow part, a filler is placed in the hollow part. It has been proposed to fill. That is, the malfunction is suppressed by partially closing the hollow portion with the filler. In order to fill the hollow structure with the filler, a filling device including an expandable member that expands by heating and a support member that supports the expandable member is used. This filling tool is heated together with the hollow structure after being disposed inside the hollow structure using the support member. Then, the expandable member is cured while being heated and expanded, so that a filler is formed from the expandable member. Such a filling tool is designed to have a shape along the cross-sectional shape of the hollow structure in order to appropriately fill the inside of the hollow structure with the filler. By the way, since the hollow structure to which the filler is applied has various shapes, it is necessary to prepare fillers having different shapes according to the type of the hollow structure and the position where the filler is filled. That is, preparing the filler according to the shape of the hollow structure has a problem that it takes time to design and manufacture the filler. Therefore, Patent Document 1 proposes a technique for bending an expandable member from an expandable molded body that is linearly extruded. Since the inflatable member is formed by bending and deforming the inflatable molded body along the shape of the support member, even inflatable members having different shapes can be formed from a common inflatable molded body. it can. Therefore, the design and manufacture of the inflatable member can be simplified.
International Publication No. 2003/004314 Pamphlet

  By the way, the work of assembling to the support member while bending and deforming the expandable molded body of Patent Document 1 to a predetermined shape is performed against the elastic force of the expandable molded body. This is more complicated than the work of assembling the molded inflatable member. That is, if the expandable member is bent from the expandable molded body, the design and manufacture of the expandable member can be simplified, but there is a problem that the assembling work is troublesome.

  The present invention has been made in view of such conventional circumstances, and an object thereof is to achieve an expansible molded body that can reduce the work of assembling to a support member, and simplification of design and manufacture. An object of the present invention is to provide a filling device that can be used.

In order to achieve the above object, the inflatable molded body according to claim 1 includes an inflatable member that expands by heating and a support member that supports the inflatable member, and the inside of the hollow structure body includes the inflatable member. and have you the filling device disposed inside the hollow structure to be filled by the thermal expansion of an inflatable shaped body for the bent of the inflatable member, the inflatable shaped body, said inflation have opposite ends which are closer sexual member when the bent, with a plurality of body portions, and a connecting portion for connecting the main body portion of the plurality of the distance between both sides of the connecting portion, said body The gist is that it is shorter than the distance between both side surfaces of the part.

  According to this structure, the connection part in which the distance between both side surfaces is formed shorter than the main body part functions as a part that is bent and deformed more easily than the main body part. For this reason, the expansible member which makes the shape along a support member can be easily bent by utilizing the bending deformation of a connection part.

  The invention according to claim 2 is that in the expandable molded body according to claim 1, a plurality of the main body portions and the connection portions are provided, and the main body portions and the connection portions are alternately connected. The gist.

According to this configuration, it is easy to bend the inflatable member having a polygonal shape with one inflatable molded body.
According to a third aspect of the present invention, in the expandable molded article according to the first or second aspect, the main body part or the connecting part adjusts a dimension in a direction in which the main body part and the connecting part are connected. The gist is to have an adjustment section.

According to this structure, it can assemble | attach to a support member, adjusting the dimension of an expandable molded object by an adjustment part.
According to a fourth aspect of the present invention, in the expandable molded body according to the third aspect, the main body portion and the connecting portion are provided on the connecting portion so that at least a part of the connecting portion functions as the adjusting portion. The gist is that a bulging portion that bulges in a direction different from the direction in which the two are connected is formed.

The gist of the invention described in claim 5 is that, in the expandable molded article according to claim 3, the main body is formed in an annular shape so that the main body functions as the adjusting part.
The said adjustment part can employ | adopt the aspect of Claim 4 or Claim 5, for example.

The filler according to claim 6 is summarized in that the expandable member bent from the expandable molded body according to any one of claims 1 to 5 is supported by the support member. And
According to this structure, even if it is an expansible member from which a shape differs, it can form from a common expansible molded object.

According to the expandable molded article of the present invention, the assembling work to the support member can be easily performed.
According to the filling tool of the present invention, design and manufacturing can be simplified.

Hereinafter, an embodiment embodying the present invention will be described in detail with reference to FIGS.
As shown in FIG. 1, the expandable molded body 11 includes a rectangular main body 12 and a square plate-like connecting portion 13 connected to the main body 12. A plurality of main body portions 12 and a plurality of connecting portions 13 are provided, and the main body portions 12 and the connecting portions 13 are alternately connected to each other, so that the expandable molded body 11 has a linear shape as a whole. This inflatable molded body 11 is for bending a quadrangular annular inflatable member 22 provided in the filler 21 shown in FIG. The expandable member 22 is a member that is heated and expanded by heat transmitted from the outside, and the filler 21 further includes a support member 23 that supports the expandable member 22. And this filling tool 21 is fixed to the vehicle pillar 51 as a hollow structure by the support member 23 as shown in FIG. The inside of the vehicle pillar 51 is filled with a filling body formed by the above. In addition, the top and bottom referred to in this specification means the top and bottom with reference to FIG. 1 and FIG.

  As shown in FIG. 1, one side surface of the expandable molded body 11 has a planar shape, while the other side surface of the expandable molded body 11 has a concave-convex shape in which the side surface of the connecting portion 13 is a recess. That is, the connecting portion 13 is formed such that the distance D1 between both side surfaces thereof is shorter than the distance D2 between both side surfaces of the main body portion 12. In other words, the expandable molded body 11 is configured by connecting a plurality of main body portions 12 to a connecting portion 13 that is narrower than the main body portion 12. The connecting part 13 formed in this way functions as a part that is bent and deformed more easily than the main body part 12. And in this expandable molded object 11, it can be easily bend-deformed with respect to the direction which bulges out any one side surface among the both sides | surfaces of the connection part 13. FIG. Note that both side surfaces of the connecting portion 13 are a surface that bulges when the inflatable member 22 is bent, and a back surface of the bulged surface. On the other hand, the side surface of the main body portion 12 is a surface continuous with the side surface of the connecting portion 13. A distance D1 between both side surfaces of the connecting portion 13 and a distance D2 between both side surfaces of the main body portion 12 are distances in a direction substantially orthogonal to the direction in which the main body portion 12 and the connecting portion 13 are connected.

  The expandable molded body 11 is integrally formed from an expandable material that expands by heating. What is necessary is just to select an expansible material suitably according to the function requested | required of a filler. Examples of the component of the expandable material include a base material, a foaming agent, and a crosslinking agent, a filler, a plasticizer, and the like. Examples of the base material include synthetic resins, elastomers, and rubbers. Synthetic resins are classified into thermosetting resins and thermoplastic resins. Examples of thermosetting resins include epoxy resins, phenol resins, urethane resins, and acrylic resins. Thermoplastic resins include polyolefins, EVA (ethylene / ethylene / ethylene resins). Vinyl acetate copolymer). Examples of the elastomer include SBS (styrene / butadiene / styrene block copolymer), and examples of the rubber include NR (natural rubber), ENR (epoxidized natural rubber), and EPM (ethylene / propylene rubber). Examples of the foaming agent include azodicarbonamide and dinitropentamethylenetetramine, examples of the crosslinking agent include well-known dimethylurea and dicyandiamide, and examples of the filler include calcium carbonate, barium sulfate, ferrite, and silica. In addition to the sound insulation function and the vibration damping function, functions required for the filler include a function for increasing rigidity, a reinforcing function, a sound absorbing function, an impact absorbing function, and the like.

  The molding method of the expandable molded body 11 is not limited, and the expanded molded body is molded by combining molding methods such as injection molding and various molding methods such as extrusion molding and punching molding. Then, by utilizing the bending deformation of the connecting portion 13, the expandable member 22 shown in FIG. 2A is bent from the expandable molded body 11. In the present embodiment, the expandable member 22 having four corners is formed by bending and deforming the connecting portion 13 of the expandable molded body 11 so that the uneven side surface is on the inside.

  The support member 23 that supports the inflatable member 22 includes a support portion 24 having a rectangular frame shape and a plurality of protrusions 25 that protrude from the upper surface of the support portion 24. Further, the support member 23 is provided with an inner peripheral wall portion 26 erected on the inner peripheral edge of the support portion 24 and a closing portion 27 that closes the inner side of the inner peripheral wall portion 26. The support member 23 is fixed to the inside of the vehicle pillar 51 (see FIG. 3) by a mounting engagement portion 28 provided in the support portion 24.

  The upper surface of the support portion 24 is configured as a support surface 24a on which the expandable member 22 is supported, while the lower surface of the expandable member 22 is configured as a supported surface 22a, and the expandable member 22 is covered on the support surface 24a. The support surface 22 a is brought into contact with and is supported by the support portion 24. In addition, insertion holes 14 are respectively provided in the body portion 12 of the expandable member 22 (the expandable molded body 11 shown in FIG. 1) in a direction substantially perpendicular to the supported surface 22a. Then, by inserting the protruding portions 25 into the insertion holes 14, the expandable member 22 is positioned on the support surface 24 a, and the expandable member 22 is suitably held by the support portion 24. Become. Further, as shown in FIG. 2B, the insertion hole 14 is formed with an engaging protrusion 14a protruding from the inner peripheral surface thereof. On the other hand, an engaging claw 25 a that protrudes substantially orthogonal to the direction in which the protruding portion 25 protrudes is provided at the tip of the protruding portion 25. When the protruding portion 25 is inserted into the insertion hole 14, the engaging claw 25a is engaged with the engaging protrusion 14a as shown by a two-dot chain line in FIG. A sufficient holding force of the expandable member 22 can be obtained.

  The material forming the support member 23 is not particularly limited as long as it is a material that exhibits a support function without being substantially deformed when the expandable member 22 is expanded. That is, a material having a softening temperature higher than the temperature at which the expandable member 22 is expanded may be appropriately selected. Examples of the material of the support member 23 include synthetic resin and metal. Among these materials, synthetic resin is preferable from the viewpoint of excellent moldability. In the present embodiment, a polyamide-based resin is employed, and the resin is integrally molded from this polyamide resin.

  In order to assemble the expandable member 22 to the support member 23 of the filling device 21, the expandable molded body 11 shown in FIG. 1 is bent and deformed along the support portion 24 shown in FIG. The protrusion 25 is inserted into the insertion hole 14. In this assembling operation, the connecting portion 13 of the expandable molded body 11 functions as a portion that is more easily bent and deformed than the main body portion 12, so that the expandable member 22 having a shape along the support portion 24 can be easily bent. can do. Further, when the support portion 24 is changed to a triangular frame-shaped support portion, for example, the expandable molded body 11 is bent and deformed into a triangular frame shape, thereby forming an expandable member having a shape along the support portion. be able to. That is, even if it is a filling tool from which the whole shape of a support part differs, the expansible member suitable for the support part can be formed from the common expansible molded object 11. FIG.

  In order to use the filling tool 21, first, the support member 23 is fixed to the vehicle pillar 51. As shown in FIG. 3, the filling tool 21 of the present embodiment is fixed to the inner pillar 52 by engaging the mounting engagement portion 28 with a mounting hole 52 a penetrating the inner pillar 52. Next, the vehicle pillar 51 is formed by assembling the outer pillar 53 to the inner pillar 52, and the filler 21 is disposed inside the vehicle pillar 51 as shown in FIG. The vehicle pillar 51 in which the filler 21 is arranged in this way constitutes a part of the vehicle body, and the vehicle body is subjected to coating such as electrodeposition coating and baking coating. In such a vehicle manufacturing process, when the vehicle body is heated in the drying furnace, the filler 21 is heated at a predetermined temperature for a predetermined time. Then, as shown in FIG. 4B, the inflatable member 22 expands with foaming and hardens to form the filler 29. In the support member 23 of the present embodiment, an inner peripheral wall portion 26 is erected along the inner peripheral surface of the expandable member 22. The inner peripheral wall portion 26 restricts the expansion of the expandable member 22 toward the inside of the support portion 24. As a result, the expansion of the expandable member 22 toward the inner peripheral surface of the vehicle pillar 51 is promoted. Is preferably in close contact with the inner peripheral surface of the vehicle pillar 51.

  In this manner, a predetermined portion inside the vehicle pillar 51 is blocked by the filler 29 and the blocking portion 27. In addition, since this filling body 29 is formed by expanding the expandable member 22 using foaming by a foaming agent, it has an independent or continuous cell structure. As described above, in the vehicle pillar 51 in which a predetermined portion is blocked, the rigidity, the sound insulation performance when the vehicle travels, the vibration damping performance, and the like are improved.

The effects exhibited by this embodiment will be described below.
(1) In the expandable molded body 11, the connecting portion 13 that is formed so that the distance between both side surfaces is shorter than the main body portion 12 functions as a portion that is more easily bent and deformed than the main body portion 12. For this reason, the expansible member 22 which makes the shape along the support member 23 can be easily bent by utilizing the bending deformation of the connecting portion 13. As a result, it is possible to reduce the labor of assembling work for assembling the supporting member 23.

  Moreover, even if it is an expansible member from which whole shape differs, it can form from the common expansible molded object 11. FIG. That is, for example, it is possible to save labor for designing a mold according to the overall shape of the expandable member. For example, according to the necessity of the expansible member from which the whole shape differs, the effort which manufactures an expansible member can be saved now.

  As described above, the design and manufacture of the inflatable member can be simplified, and the labor for assembling can be reduced, so that sufficient productivity can be achieved for the filling device 21 with various shapes. Can be secured.

  Furthermore, since the inflatable member 22 can be bent by bending deformation of the connecting portion 13, the main body portion 12 can be designed without considering the bending deformation of the main body portion 12. That is, the volume of the main body 12 can be increased, for example, according to the filling performance required for the expandable member 22 and the function required for the obtained filling body 29. Therefore, with respect to the curved inflatable member 22, the filling performance can be sufficiently secured, and the function of the obtained filling body 29 can be sufficiently exhibited.

  (2) According to the inflatable molded body 11 in which a plurality of main body portions 12 and a plurality of connection portions 13 are provided, and the main body portions 12 and the connection portions 13 are alternately connected, a single inflatable member 22 having a polygonal shape is provided. It is easy to bend with the two expandable molded bodies 11. For this reason, since the number of parts constituting the expandable member 22 can be reduced, the assembling work can be simplified.

  (3) This filling tool 21 is obtained by supporting an expandable member 22 obtained by bending from the expandable molded body 11 by a support member 23. Since the filling tool 21 can be formed from the common inflatable molded body 11 even if the inflatable member 22 has a different shape, the design and manufacture can be simplified. Furthermore, in the inflatable member 22 using the bending deformation of the connecting portion 13, the elastic force accompanying the bending deformation is suppressed, so that the shape of the inflatable member 22 supported by the support member 23 is also stable. For this reason, especially in the expansible member 22 formed in frame shape, it becomes easy to maintain the state which the both ends which are the discontinuous parts approached. As a result, the frame shape of the inflatable member 22 is suitably maintained, so that a predetermined part in the vehicle pillar 51 can be suitably filled.

In addition, the said embodiment can also be changed and actualized as follows.
-The whole shape of the expansible molded object 11 is not limited to linear form. That is, it is only necessary that the main body portion 12 and the connecting portion 13 are continuous. For example, the same effect can be obtained even when the shape is changed to a linear shape such as a curved shape.

-If the number of the main-body parts 12 is plural, the number is not particularly limited. The number of connecting portions 13 may be singular or plural.
A single inflatable member 22 may be formed using a plurality of inflatable molded bodies 11. For example, the inflatable member 22 shown in FIG. 2A may be formed by combining the inflatable member 22 bent in an L shape. In this case, an inflatable member 22 in which two main body portions 12 are connected by one connecting portion 13 can be used.

  The main body part 12 and the connecting part 13 are integrally formed, but after the main body part 12 and the connecting part 13 are molded separately, the main body part 12 and the connecting part 13 are bonded using an adhesive or the like. The expandable molded body 11 may be formed by bonding. However, if the main body portion 12 and the connecting portion 13 are integrally molded, the productivity of the expandable molded body 11 can be improved.

  -The insertion hole 14 can also be omitted. In this case, without providing the protruding portion 25, for example, an outer peripheral wall portion is erected on the outer peripheral edge of the support surface 24a. Then, the expandable member 22 can be supported by the support portion 24 by sandwiching the expandable member 22 (the expandable molded body 11) between the outer peripheral wall portion and the inner peripheral wall portion 26. For example, even if the expandable member 22 is bonded to the support portion 24 with an adhesive, the expandable member 22 can be supported by the support portion 24.

The engagement protrusion 14a can be omitted. In this case, from the viewpoint of obtaining a sufficient holding force, it is preferable to form the insertion hole 14 in such a size that the protruding portion 25 is inserted.
-It is not necessary to provide the engagement protrusion 14a in all the some insertion holes 14. FIG. That is, even if the engagement protrusion 14 a is provided in at least one of the plurality of insertion holes 14, the effect of increasing the holding force of the expandable member 22 with respect to the support portion 24 can be obtained.

  -While providing the protrusion in the expansible member 22, the support part 24 can also be penetrated by the support hole by which the protrusion is inserted or fitted. And you may comprise so that the expansible member 22 may be supported by the support part 24 in the state by which protrusion was inserted or fitted to the support hole. Even in such a configuration, the expandable member 22 can be positioned on the support surface 24a, and the holding force of the expandable member 22 on the support portion 24 can be improved.

  The supported surface 22a is not limited to the lower surface of the expandable member 22 (expandable molded body 11), and the side surface of the expandable member 22 (expandable molded body 11) can be configured as the supported surface 22a. The inflatable molded body 11 shown in FIG. 5A is applied to the support member 23 shown in FIG. In the inflatable molded body 11, a fitting hole 15 is provided so as to be substantially orthogonal to the side surface. In the support member 23 shown in FIG. 5B, the outer peripheral surface of the support portion 24 is configured as a support surface 24a, while the inner surface of the expandable member 22 is configured as a supported surface 22a. ing. As shown in FIGS. 5B and 5C, the inflatable member 22 has a support surface formed by fitting a protrusion 25 protruding from the support surface 24 a into the fitting hole 15. 24a is supported.

  -The shape of the main-body part 12 and the connection part 13 is not specifically limited. For example, the main body 12 may be formed in a triangular shape or a column shape. For example, you may form the connection part 13 in a column shape. In addition, when the main-body part 12 or the connection part 13 makes the column shape extended in the direction where the main-body part 12 and the connection part 13 continue, the distance between the both side surfaces in the column-shaped main-body part 12 or the column-shaped connection part 13 is the following. , The diameter of the main body portion 12 or the connecting portion 13.

  -As an example of a change of the shape of the connection part 13, the bulging part 16 shown to Fig.6 (a) is mentioned, for example. The bulging portion 16 as the connecting portion is formed so as to bulge in a direction different from the direction in which the main body portion 12 and the bulging portion 16 are continuous, whereby the main body portion 12 and the bulging portion 16 are continuous. It functions as an adjustment unit that adjusts the dimension in the direction. The bulging portions 16 shown in FIG. 6A are each formed in a bent shape (V-shape). The inflatable molded body 11 having the bulging portion 16 is in a compressed state shown in FIG. 6 (c) by the elastic deformation of the bulging portion 16 from a state where it does not receive the load shown in FIG. 6 (b). It can deform | transform into the expansion | extension state shown by FIG.6 (d). Such an expandable molded body 11 can be assembled to the support member 23 as shown in FIG. 7 while adjusting the dimensions by utilizing the expansion and contraction of the bulging portion 16. For this reason, for example, even if a dimensional error occurs between the interval between the protruding portions 25 and the interval between the insertion holes 14, the dimensional error can be easily absorbed by the expansion and contraction of the bulging portion 16. Therefore, the assembling work for the support member 23 can be performed more smoothly. In addition, in the expansible molded object 11 shown to Fig.6 (a), although the whole connection part 13 is comprised as the bulging part 16, you may form the bulging part 16 in a part of connection part 13. FIG. . Moreover, the shape of the bulging part 16 is not specifically limited, For example, it can also change into curved shape.

  Furthermore, as an aspect in which a part of the expandable molded body 11 functions as an adjustment unit, a main body unit 12 illustrated in FIG. The main body 12 is formed in an annular shape and is elastically deformed so that its diameter changes. That is, the expandable molded body 11 can be deformed from a state shown in FIG. 8 (b) to a stretched state shown in FIG. 8 (c) or a compressed state shown in FIG. 8 (d). is there. For this reason, in addition to the bending deformation of the connecting portion 13, the expandable molded body 11 can be assembled to the support member 23 using the expansion and contraction of the main body portion 12. In addition, the shape of the main body 12 that functions as the adjustment unit is not limited to an annular shape, but may be changed to an annular shape such as a square shape or a triangular shape.

  As shown in FIG. 9, in order to reduce the width of the expandable molded body 11 at the side portion of the expandable molded body 11, a connecting portion 13 that connects a plurality of main body portions 12 is formed by forming a slit 17. May be. As shown in FIG. 10, the expandable molded body 11 bends the expandable member 22 by bending the connecting portion 13 so that the side surface on which the slits 17 are formed becomes the outer peripheral surface. By using the bending deformation of the connecting portion 13 accompanied with the expansion of the slit 17, the expandable member 22 can be easily bent. The slit 17 can be formed by forming a columnar molded body by, for example, extrusion molding, and then cutting the side of the molded body with a cutting blade.

  -As shown in FIG. 10, the protrusion part 25 and the insertion hole 14 do not necessarily need to respond | correspond one-to-one. That is, more insertion holes 14 may be formed than the number of protrusions 25. In this case, of the plurality of insertion holes 14, the protrusion 25 is inserted only into the insertion hole 14 at a position corresponding to the protrusion 25 and the expandable member 22 is supported by the support 24.

  -As a manufacturing method of the expandable molded body 11, in addition to molding the expandable molded bodies 11 one by one, after integrally forming a connection body in which a plurality of the expandable molded bodies 11 are continuous, the connection body is cut. The method of obtaining the expansible molded object 11 of predetermined length by this is mentioned. That is, the expandable molded body 11 is a manufacturing process including a molding step of integrally molding a connection body in which a plurality of the expandable molded bodies 11 are continuous, and a cutting step of forming the expandable molded body 11 by cutting the connection body. You may manufacture by the method. Thus, if the expansible molded object 11 is manufactured, improvement of production efficiency can be aimed at.

  -The shape of the support part 24 and the support surface 24a is not specifically limited, For example, according to the internal shape of the vehicle pillar 51, it changes into a triangular frame shape etc. Furthermore, the inner peripheral wall portion 26 of the support member 23 may be omitted, and the flat support member 23 may be used.

-The attachment engagement portion 28 may be omitted. That is, the support member 23 may be fixed to the inner pillar 52 by a fixing means such as an adhesive or a double-sided tape.
-The hollow structure in which the filling tool 21 is arranged is not particularly limited, and the filling tool 21 may be applied to a hollow structure such as a cover, a door panel, or a rocker panel, or a hollow structure such as a panel in a building.

The technical idea that can be grasped from the embodiment and the modified example will be described below.
(B) The expandable molded body according to any one of claims 1 to 5, wherein the main body portion and the connecting portion are integrally formed from an expandable material that expands by heating.

(B) The inflatable molded body according to any one of claims 1 to 5, wherein the main body portion is provided with an insertion hole into which a protruding portion protruding from the support member is inserted.
(C) The expandable molded body according to any one of claims 1 to 5, wherein a protrusion that can be inserted into a support hole provided in the support member is formed on the main body portion.

  (D) A method for producing an expandable molded body according to any one of claims 1 to 5 and (a) to (c) above, wherein a plurality of the expandable molded bodies are connected. A method for producing an inflatable molded body, comprising: a molding step for integrally molding the step, and a cutting step for forming the expandable molded body by cutting the connecting body.

  (E) A molding step of integrally molding a connection body in which a plurality of the expandable molded bodies according to any one of claims 1 to 5 and (a) to (c) are connected, and the connection body. A filling device manufacturing method comprising: a cutting step of forming the expandable molded body by cutting; and an assembly step of bending the expandable member from the expandable molded body and assembling the expandable member to the support member. .

The perspective view of the expansible molding in an embodiment. (A) is a disassembled perspective view of a filling tool, (b) is the 2b-2b sectional view taken on the line of (a). The perspective view which shows the vehicle pillar of a filling tool and a decomposition | disassembly state. (A) is sectional drawing which shows the vehicle pillar with which the filling tool was mounted | worn, (b) is sectional drawing which shows the vehicle pillar with which the filler was filled. (A) is a perspective view which shows the modification of an expandable molded object, (b) is a perspective view which shows the modification of a filling tool, (c) is the 5c-5c sectional view taken on the line of (b). (A) is a perspective view which shows the modification of an expandable molded object, (b) is the top view, (c) is a top view which shows a compression state, (d) is a top view which shows an expansion | extension state. The perspective view which shows the modification of a filling tool. (A) is a perspective view which shows the modification of an expandable molded object, (b) is the top view, (c) is a top view which shows an expansion | extension state, (d) is a top view which shows a compression state. The perspective view which shows the modification of an expansible molded object. The disassembled perspective view which shows the modification of a filling tool.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 11 ... Expandable molded object, 12 ... Main-body part, 13 ... Connection part, 14 ... Insertion hole, 14a ... Engagement protrusion, 15 ... Fitting hole, 16 ... Expansion part, 17 ... Slit, 21 ... Filler, 22 ... Expandable member, 22a ... Supported surface, 23 ... Support member, 24 ... Support portion, 24a ... Support surface, 25 ... Protruding portion, 25a ... engagement claw, 26 ... Inner peripheral wall portion, 27 ... Occluded portion, 28 ... Attachment engaging portion, 29 ... filler, 51 ... vehicle pillar, 52 ... inner pillar, 52a ... attachment hole, 53 ... outer pillar.

Claims (6)

A filling device provided with an expandable member that expands by heating and a support member that supports the expandable member, and is disposed inside the hollow structure so as to fill the interior of the hollow structure by heating and expansion of the expandable member. Contact stomach, the expandable member comprising an inflatable molded body to the bent,
The expandable molded body has both end portions that are approached when the expandable member is bent,
An expansibility comprising a plurality of main body portions and a connecting portion for connecting the plurality of main body portions, wherein a distance between both side surfaces of the connecting portion is shorter than a distance between both side surfaces of the main body portion. Molded body. 2. The expandable molded body according to claim 1, wherein a plurality of the main body portions and the connection portions are provided, and the main body portions and the connection portions are alternately connected. The expandable molded article according to claim 1 or 2, wherein the main body part or the connecting part has an adjusting part for adjusting a dimension in a direction in which the main body part and the connecting part are continuous. The bulging portion that bulges in a direction different from a direction in which the main body portion and the connecting portion are connected is formed in the connecting portion so that at least a part of the connecting portion functions as the adjusting portion. 3. The expandable molded article according to 3. The inflatable molded body according to claim 3, wherein the main body portion is formed in an annular shape so that the main body portion functions as the adjusting portion. The filling tool by which the said expandable member bent from the expandable molded object as described in any one of Claims 1-5 is supported by the said support member.

Images