JP2021066342A - Blocking structure for hollow member - Google Patents

Abstract

To provide a blocking structure for a hollow member, which is able to restrict flow of air around a blocking portion in a hollow part.SOLUTION: The blocking structure 11 of a hollow member comprises a blocking member 31 that is a component member of a vehicle and is disposed in a hollow part of a hollow member that has a shape having a longitudinal direction D1. The hollow member 21 has a joint part 24 that forms a hollow part by joining a plurality of component panels. The blocking structure 11 has a composite blocking structure 14 composed of a first blocking structure 12 and a second blocking structure 13 adjacent to the first blocking structure 12 in the longitudinal direction D1 of the hollow member 21. The first blocking structure 12 has a blocking member 31 and a joining part 24 in an orthogonal direction D2 orthogonal to the longitudinal direction D1 of the hollow member 21. In the orthogonal direction D2, the second blocking structure 13 has only the joining portion 24 of the blocking member 31 and the joining portion 24. The composite blocking structure 14 has a structure in which the joining part 24 of the first blocking structure 12 and the joining part 24 of the second blocking structure 13 are continuous.SELECTED DRAWING: Figure 3

Description

The present invention relates to a blocking structure of a hollow member.

Conventionally, for example, a structure in which a foam is arranged in a hollow portion of a hollow member such as a pillar of a vehicle is known (see Patent Document 1). The foam arranged in the hollow portion of the hollow member exerts an effect of suppressing the generation of abnormal noise such as wind noise generated in the hollow portion.

Japanese Unexamined Patent Publication No. 2013-087130

As in the conventional case, the foam arranged in the hollow portion of the hollow member serves as an air blocking portion in the hollow portion, but there may be a path that allows the flow of air around the blocking portion. It is preferable to suppress the flow of air also in such a path.

The present invention has been made in view of such circumstances, and an object of the present invention is to provide a blocking structure for a hollow member capable of suppressing the flow of air around a blocking portion in the hollow portion.

The blocking structure of the hollow member for solving the above problems is a blocking structure of a hollow member including a hollow member having a shape having a longitudinal direction as well as a constituent member of the vehicle and a blocking member arranged in the hollow portion of the hollow member. The hollow member has a plurality of constituent panels and a joint portion that forms the hollow portion by joining the plurality of constituent panels, and the blocking structure includes a first blocking structure and the first blocking structure. It has a composite blocking structure composed of a second blocking structure adjacent to the first blocking structure along the longitudinal direction of the hollow member, and the first blocking structure relates to the longitudinal direction of the hollow member. In the orthogonal orthogonal direction, the blocking member and the joint portion are provided, and the second blocking structure has only the joint portion of the blocking member and the joint portion in the orthogonal direction, and the composite blocking portion is provided. The structure has a structure in which the joint portion of the first blocking structure and the joint portion of the second blocking structure are continuous.

According to this configuration, the continuous structure of the joint portion of the first cutoff structure and the joint portion of the second cutoff structure can suppress the flow of air around the cutoff portion in the hollow portion.
In the blocking structure of the hollow member, the hollow portion of the hollow member is composed of a plurality of pieces arranged along the orthogonal direction, and the composite blocking structure having the blocking member arranged in at least one hollow portion is used. You may prepare.

In the blocking structure of the hollow member, the hollow portion of the hollow member has a first hollow portion and a second hollow portion adjacent to the first hollow portion along the orthogonal direction. The blocking member has a first blocking member arranged in the first hollow portion and a second blocking member arranged in the second hollow portion, and the composite blocking structure includes the first blocking member. It is preferable to include a first composite blocking structure having a member and a second composite blocking structure having the second blocking member.

According to this configuration, unnecessary air flow can be suppressed in the adjacent first hollow portion and the second hollow portion.
In the blocking structure of the hollow member, it is preferable that at least a part of the first composite blocking structure and at least a part of the second composite blocking structure are arranged so as to overlap each other in the orthogonal direction.

According to this configuration, for example, it is possible to suppress the inflow of air from one hollow portion to the other hollow portion, so that the flow of air is allowed in the adjacent first hollow portion and the second hollow portion. It can be more suppressed.

In the blocking structure of the hollow member, as the composite blocking structure, the first blocking arranged between the pair of the second blocking structures arranged along the longitudinal direction and the pair of the second blocking structures. It is preferable to include a composite blocking structure composed of a structure.

According to this configuration, it is possible to suppress the flow of air on both sides of the blocking portion in the hollow portion.
In the blocking structure of the hollow member, the blocking member may include a foam.

In the blocking structure of the hollow member, the joint portion may include a joint portion formed by an adhesive.

According to the present invention, it is possible to suppress the flow of air around the blocking portion in the hollow portion.

It is a perspective view which shows a part of the blocking structure of the hollow member in 1st Embodiment. It is an exploded perspective view which shows a part of the blocking structure of a hollow member. It is a top view which shows by cutting out a part of the blocking structure of a hollow member. It is a side view which shows by cutting out a part of the blocking structure of a hollow member. It is sectional drawing of the blocking structure of the hollow member in 2nd Embodiment. It is sectional drawing which shows the blocking structure of a hollow member. It is a side view which shows by cutting out a part of the blocking structure of a hollow member.

(First Embodiment)
Hereinafter, the first embodiment of the blocking structure of the hollow member will be described with reference to the drawings.
As shown in FIGS. 1 and 2, the blocking structure 11 of the hollow member includes a hollow member 21 which is a component of the vehicle and has a shape having a longitudinal direction D1, and a blocking member 31 arranged in the hollow portion of the hollow member 21. And have.

The hollow member 21 has a first constituent panel 22 and a second constituent panel 23, and a joint portion 24 that forms a hollow portion by joining the first constituent panel 22 and the second constituent panel 23. The first constituent panel 22 and the second constituent panel 23 have a longitudinal direction corresponding to the longitudinal direction D1 of the hollow member 21. The first constituent panel 22 is a flat plate-shaped panel, and the second constituent panel 23 is a hat-shaped panel having a hat-shaped cross section. The second configuration panel 23 has both flange-shaped portions. The joint portion 24 of the present embodiment is composed of a first joint portion 25 and a second joint portion 26. The first joint portion 25 joins one side portion of the first configuration panel 22 and one side portion of the second configuration panel 23, and the second joint portion 26 joins the other side portion of the first configuration panel 22 and the second. It is joined to the other side of the configuration panel 23.

The blocking member 31 partially blocks the hollow portion in the longitudinal direction D1 of the hollow member 21 to prevent air in the hollow portion from flowing along the longitudinal direction D1.
As shown in FIGS. 3 and 4, the blocking structure 11 of the hollow member is composed of the first blocking structure 12 and the second blocking structure 13 adjacent to the first blocking structure 12 along the longitudinal direction D1 of the hollow member 21. It has a composite blocking structure 14 that is configured. The first blocking structure 12 has a blocking member 31 and a joint portion 24 in the orthogonal direction D2 orthogonal to the longitudinal direction D1 of the hollow member 21. In other words, the first blocking structure 12 has a blocking member 31 and a joint portion 24 in a cross section orthogonal to the longitudinal direction D1 of the hollow member 21.

The second blocking structure 13 has only the joining portion 24 of the blocking member 31 and the joining portion 24 in the orthogonal direction D2 orthogonal to the longitudinal direction D1 of the hollow member 21. In other words, the second blocking structure 13 has only the joining portion 24 of the blocking member 31 and the joining portion 24 in the cross section orthogonal to the longitudinal direction D1 of the hollow member 21.

The composite blocking structure 14 has a structure in which the joining portion 24 of the first blocking structure 12 and the joining portion 24 of the second blocking structure 13 are continuous. In the composite cutoff structure 14 of the present embodiment, the first joint portion 25 of the first cutoff structure 12 and the first joint portion 25 of the second cutoff structure 13 are continuous, and the second joint portion 26 of the first cutoff structure 12 is continuous. And the second joint portion 26 of the second blocking structure 13 have a continuous structure. The joint portion 24 connected to the first blocking structure 12 and the second blocking structure 13 extends along the longitudinal direction D1 of the hollow member 21.

The composite blocking structure 14 of the present embodiment is a first blocking structure 12 arranged between a pair of second blocking structures 13 arranged along the longitudinal direction D1 of the hollow member 21 and a pair of second blocking structures 13. It is composed of and. That is, the second blocking structure 13 is arranged at both positions adjacent to the first blocking structure 12 along the longitudinal direction D1 of the hollow member 21.

Next, the material of each member will be described.
Examples of the material constituting the first constituent panel 22 and the second constituent panel 23 include a metallic material such as steel and aluminum, and a non-metallic material such as synthetic resin and ceramics. The material of the first constituent panel 22 may be the same type of material as the material of the second constituent panel 23, or may be a different material. For example, the material of the first constituent panel 22 may be a metal material of the same type or different type as the material of the second constituent panel 23, or a non-metal material of the same type or different type. Further, the material of the first constituent panel 22 may be a metallic material, and the material of the second constituent panel 23 may be a non-metallic material.

The joint portion 24 can be formed by, for example, an adhesive. Examples of the adhesive include structural adhesives, spot sealers and the like. The adhesive contains, for example, a main polymer, a curing agent, a plasticizer, and a filler. Examples of the main polymer include epoxy-based resin materials and rubber-based materials. Examples of the rubber-based material include BR (butadiene rubber), SBR (styrene / butadiene rubber), NBR (nitrile rubber) and the like. Examples of the curing agent include dicyandiamide and sulfur. Examples of the plasticizer include phthalates, aliphatic esters and the like. Examples of the filler include calcium carbonate, silica and the like. The adhesive of the first joint portion 25 may be the same type of adhesive as the adhesive of the second joint portion 26, or may be a different type of adhesive. The composition of the adhesive and the method of applying the adhesive are not particularly limited. As the adhesive, an adhesive having a composition suitable for the materials of the first constituent panel 22 and the second constituent panel 23 can be selected and used. Further, for applying the adhesive, for example, a coating machine equipped with a nozzle and a dispenser can be used.

The blocking member 31 includes, for example, a foam. The foam can be formed by externally heating the foamable member arranged in the hollow portion of the hollow member 21. The foamable member is obtained by molding a foamable material by a well-known molding method such as extrusion molding, press molding, or injection molding. The effervescent material contains a substrate, a foaming agent, and a cross-linking agent. The foamable material may contain a filler, a plasticizer, or the like, if necessary. Examples of the base material include synthetic resins, elastomers and rubbers. Examples of the synthetic resin include polyolefin, epoxy resin, phenol resin, urethane resin, acrylic resin, styrene resin, EVA (ethylene / vinyl acetate copolymer) and the like. Examples of the elastomer include RB (polybutadiene elastomer), SBS (styrene / butadiene / styrene block copolymer), SIS (styrene / isoprene / styrene block copolymer), SEBS (styrene / ethylene / butylene / styrene block copolymer) and the like. Can be mentioned. Rubbers include NR (natural rubber), SBR (styrene / butadiene rubber), BR (butadiene rubber), NBR (nitrile rubber), CR (chloroprene rubber), IR (isoprene rubber), IIR (butyl rubber), EPDM (ethylene). Examples thereof include propylene diene ternary copolymer), UR (urethane rubber), ENR (epoxidized natural rubber), and EPM (ethylene / propylene rubber). Examples of the foaming agent include azodicarbonamide and dinitropentamethylenetetramine, examples of the cross-linking agent include well-known dimethylurea and dicyandiamide, and examples of the filler include calcium carbonate, barium sulfate, ferrite and silica.

Next, the operation of the blocking structure 11 of the hollow member will be described.
In the blocking structure 11 of the hollow member, the joint portion 24 of the first blocking structure 12 and the joining portion 24 of the second blocking structure 13 are continuous structures, so that the flow of air around the blocking portion in the hollow portion can be suppressed. it can. For example, as shown by the white arrows in FIG. 3, the air flowing along the blocking member 31 of the first blocking structure 12 in the hollow portion of the hollow member 21 is a combination of the first configuration panel 22 and the second configuration panel 23. It may flow in between. In this way, the joint portion 24 of the first blocking structure 12 and the joint portion 24 of the second blocking structure 13 allow the flow of air toward between the first constituent panel 22 and the second constituent panel 23 along the blocking member 31. By suppressing the continuous structure, for example, it is possible to prevent air from leaking from the hollow portion around the blocking member 31 to the outside of the hollow portion.

Next, the operation and effect of the first embodiment will be described.
(1-1) The blocking structure 11 of the hollow member is a composite blocking composed of a first blocking structure 12 and a second blocking structure 13 adjacent to the first blocking structure 12 along the longitudinal direction D1 of the hollow member 21. It has a structure 14. The first blocking structure 12 has a blocking member 31 and a joint portion 24 in the orthogonal direction D2 orthogonal to the longitudinal direction D1 of the hollow member 21. The second blocking structure 13 has only the joining portion 24 of the blocking member 31 and the joining portion 24 in the orthogonal direction D2. The composite blocking structure 14 has a structure in which the joining portion 24 of the first blocking structure 12 and the joining portion 24 of the second blocking structure 13 are continuous. According to this configuration, since the above-mentioned action can be obtained, the flow of air around the blocking portion in the hollow portion can be suppressed. Thereby, for example, it is possible to suppress the generation of abnormal noise due to the flow of air around the blocking portion.

(1-2) The composite blocking structure 14 is composed of a pair of second blocking structures 13 arranged along the longitudinal direction D1 and a first blocking structure 12 arranged between the pair of second blocking structures 13. Has been done. In this case, the flow of air on both sides of the blocking portion in the hollow portion can be suppressed. Thereby, for example, the generation of abnormal noise due to the flow of air around the blocking portion can be further suppressed.

(Second Embodiment)
The second embodiment of the blocking structure 11 of the hollow member will be described focusing on the differences from the first embodiment.

As shown in FIGS. 5 to 7, the hollow member 21 of the second embodiment has a pair of hollow portions arranged along the orthogonal direction D2. The hollow member 21 further includes a third configuration panel 27 that is arranged so as to sandwich the first configuration panel 22 with the second configuration panel 23. The third configuration panel 27 is a hat-shaped panel having a hat-shaped cross section, and has both flange-shaped portions. The material of the third constituent panel 27 may be the same type of material as the material of the first constituent panel 22 or the second constituent panel 23, or may be a different material.

The joint portion 24 of the hollow member 21 includes a first joint portion 25a and a second joint portion 26a as a joint portion 24 for joining the first constituent panel 22 and the second constituent panel 23, and the first constituent panel 22 and the third. It is composed of a first joint portion 25b and a second joint portion 26b as a joint portion 24 for joining the configuration panel 27. The type of adhesive for each joint can be selected independently.

In the hollow member 21, in addition to the first hollow portion formed by joining the first constituent panel 22 and the second constituent panel 23, the first constituent panel 22 and the third constituent panel 27 are joined to each other. It has a second hollow portion formed by the above. The first hollow portion and the second hollow portion are adjacent to each other via the first configuration panel 22. That is, the hollow portion of the hollow member 21 is divided into a first hollow portion and a second hollow portion by the first constituent panel 22 extending along the longitudinal direction D1 of the hollow member 21.

The blocking member 31 of the present embodiment has a first blocking member 31a arranged in the first hollow portion and a second blocking member 31b arranged in the second hollow portion. The foam of the first blocking member 31a may be the same type of foam as the foam of the second blocking member 31b, or may be a different type of foam.

As shown in FIG. 7, the composite blocking structure 14 is composed of a first composite blocking structure 14a having a first blocking member 31a and a second composite blocking structure 14b having a second blocking member 31b. The first composite blocking structure 14a and the second composite blocking structure 14b are both arranged between the pair of second blocking structures 13 arranged along the longitudinal direction D1 of the hollow member 21 and the pair of second blocking structures 13. It is composed of the first blocking structure 12 to be formed. At least a part of the first composite cutoff structure 14a and at least a part of the second composite cutoff structure 14b are arranged so as to overlap each other in the orthogonal direction D2. In other words, in the blocking structure 11 of the hollow member, the cross section orthogonal to the longitudinal direction D1 of the hollow member 21 includes a cross section in which both the first composite blocking structure 14a and the second composite blocking structure 14b are arranged.

Next, the operation and effect of the second embodiment will be described.
(2-1) The composite blocking structure 14 includes a first composite blocking structure 14a having a first blocking member 31a and a second composite blocking structure 14b having a second blocking member 31b, so that the first composite blocking structure 14 is adjacent to each other. Unnecessary air flow can be suppressed in the hollow portion and the second hollow portion.

(2-2) By arranging at least a part of the first composite cutoff structure 14a and at least a part of the second composite cutoff structure 14b so as to overlap each other in the orthogonal direction D2, for example, from one hollow portion to the other hollow portion. Since it is possible to suppress the inflow of air into the first hollow portion and the second hollow portion adjacent to each other, the flow of air can be further suppressed.

(Change example)
The above embodiment may be modified as follows. The present embodiment and the following modified examples can be implemented in combination with each other within a technically consistent range.

-For example, in the case of the second configuration panel 23, the joint portion 24 may be arranged only on the side edge side of the flange-shaped side portion without arranging the joint portion 24 on the entire flange-shaped side portion in the orthogonal direction D2. Alternatively, the joint portion 24 may be arranged so as to extend the joint portion 24 into the hollow portion.

-For example, a configuration panel having a shape in which the flange-shaped side portion of the second configuration panel 23 is omitted may be used. In this case, for example, the joint portion 24 can be provided on the end face of the constituent panel. In this way, the arrangement of the joint portions 24 can be changed according to the assembling form of the plurality of constituent panels.

-The joint portion 24 is not limited to the joint portion formed by the adhesive. The joint portion 24 may be, for example, a joint portion formed by laser welding or seam welding. Further, by performing spot welding a plurality of times so that the spot spot welding points are continuous by using spot welding, the joint portion 24 of the first cutoff structure 12 and the joint portion 24 of the second cutoff structure 13 can be made continuous. It should be noted that one joint portion 24 can be formed by combining an adhesive and a joining method such as spot welding other than the adhesive.

The foam constituting the blocking member 31 can be formed by foaming a foamable member arranged in the hollow portion, but a foam prepared in advance may be arranged in the hollow portion.
-The blocking member 31 may be composed of only a non-foaming material. For example, a non-foam made of a polymer material such as a resin material or a rubber material, a metal material, or the like can be processed into a shape capable of closing a hollow portion and used as a blocking member 31.

The composite blocking structure 14 has a pair of second blocking structures 13, but one of the second blocking structures 13 may be omitted. The composite blocking structure having one second blocking structure 13 as described above is applied to at least one of the first composite blocking structure 14a and the second composite blocking structure 14b of the second embodiment. Can be done.

In the first blocking structure 12 of the composite blocking structure 14, the blocking member 31 is in contact with the joint portion 24, but there may be a gap between the blocking member 31 and the joint portion 24. However, it is preferable that at least a part of the blocking member 31 of the first blocking structure 12 is in contact with the joint portion 24.

-In the second embodiment, one of the blocking structures of the first composite blocking structure 14a and the second composite blocking structure 14b may be omitted. That is, when a hollow member 21 having a plurality of hollow portions arranged along the orthogonal direction D2 is used, the blocking structure 11 of the hollow member is a composite blocking structure 14 having a blocking member 31 arranged in at least one hollow portion. Should be provided.

-In the second embodiment, the first composite cutoff structure 14a and the second composite cutoff structure 14b may be arranged so as not to overlap in the orthogonal direction D2.
In the second embodiment, the first blocking structure 12 of the first composite blocking structure 14a and the first blocking structure 12 of the second composite blocking structure 14b are arranged so as to overlap each other in the orthogonal direction D2. The first blocking structure 12 of the one composite blocking structure 14a and the second blocking structure 13 of the second composite blocking structure 14b may be arranged so as to overlap each other in the orthogonal direction D2. Further, for example, the second blocking structure 13 of the first composite blocking structure 14a and the second blocking structure 13 of the second composite blocking structure 14b may be arranged so as to overlap each other in the orthogonal direction D2. Even in such a case, the flow of air can be further suppressed in the adjacent first hollow portion and the second hollow portion.

A plurality of composite blocking structures 14 may be provided for one hollow portion.
-In addition to the blocking member 31 that constitutes the composite blocking structure 14, a blocking member that does not form the composite blocking structure 14 can be further arranged in the hollow portion. In this case, the arrangement of the blocking member may be an arrangement that constitutes the first blocking structure 12 together with the joint portion 24, or an arrangement that does not form the first blocking structure 12. Further, the hollow member 21 may have a joint portion that does not form the composite blocking structure 14. The arrangement of the joints in this case may be an arrangement that constitutes the first blocking structure 12 or an arrangement that does not form the first blocking structure 12.

The joint portion 24 that is continuous in the first blocking structure 12 and the second blocking structure 13, that is, the joint portion 24 that constitutes one composite blocking structure 14, is a joint of both the first joint portion 25 and the second joint portion 26. The joint portion is not limited to the portion, and may be one of the first joint portion 25 and the second joint portion 26.

Here, as in the first and second embodiments, in the composite blocking structure 14, the second blocking structure 13 is a joint portion (first) arranged so as to surround the outer periphery of the blocking member 31 in the first blocking structure 12. It is preferable to have a joint portion continuous with all of the 1 joint portion and the 2nd joint portion).

For example, when one hollow portion is formed from three or more constituent panels, the three or more joints in the first blocking structure 12 and the three or more joints in the second blocking structure 13 are continuous composites. The blocking structure 14 can also be configured.

The vehicle constituent members to which the hollow member 21 is applied are not particularly limited, and the constituent panels of the hollow member 21 include, for example, pillars, door panels, roof panels, trunk lids, front hood panels, various reinforcements, and the like. Examples include panels used.

11 ... Hollow member blocking structure, 12 ... First blocking structure, 13 ... Second blocking structure, 14 ... Composite blocking structure, 14a ... First composite blocking structure, 14b ... Second composite blocking structure, 21 ... Hollow member, 22 ... 1st configuration panel, 23 ... 2nd configuration panel, 24 ... Joint, 25, 25a, 25b ... 1st junction, 26, 26a, 26b ... 2nd junction, 27 ... 3rd configuration panel, 31 ... Blocking Members, 31a ... 1st blocking member, 31b ... 2nd blocking member, D1 ... longitudinal direction, D2 ... orthogonal direction.

Claims (7)

It is a blocking structure of a hollow member including a hollow member having a shape having a longitudinal direction as well as a constituent member of the vehicle and a blocking member arranged in the hollow portion of the hollow member.
The hollow member has a plurality of constituent panels and a joint portion that forms the hollow portion by joining the plurality of constituent panels.
The blocking structure has a composite blocking structure composed of a first blocking structure and a second blocking structure adjacent to the first blocking structure along the longitudinal direction of the hollow member.
The first blocking structure has the blocking member and the joint in a direction orthogonal to the longitudinal direction of the hollow member.
The second blocking structure has only the joint portion of the blocking member and the joint portion in the orthogonal direction.
The composite blocking structure is a blocking structure of a hollow member having a structure in which the joint portion of the first blocking structure and the joint portion of the second blocking structure are continuous. The hollow portion of the hollow member is composed of a plurality of pieces arranged along the orthogonal direction.
The blocking structure for a hollow member according to claim 1, further comprising the composite blocking structure having the blocking member arranged in at least one hollow portion. The hollow portion of the hollow member has a first hollow portion and a second hollow portion adjacent to the first hollow portion along the orthogonal direction.
The blocking member has a first blocking member arranged in the first hollow portion and a second blocking member arranged in the second hollow portion.
The blocking structure for a hollow member according to claim 1, wherein the composite blocking structure includes a first composite blocking structure having the first blocking member and a second composite blocking structure having the second blocking member. The blocking structure for a hollow member according to claim 3, wherein at least a part of the first composite blocking structure and at least a part of the second composite blocking structure are arranged so as to overlap each other in the orthogonal direction. The composite blocking structure includes a pair of the second blocking structures arranged along the longitudinal direction and the first blocking structure arranged between the pair of the second blocking structures. The blocking structure for a hollow member according to any one of claims 1 to 4, which includes a structure. The blocking structure for a hollow member according to any one of claims 1 to 5, wherein the blocking member includes a foam. The blocking structure for a hollow member according to any one of claims 1 to 6, wherein the joint includes a joint formed of an adhesive.

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