JP2005047591A - Lid section mounting structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a lid section mounting structure capable of tightly securing a lid section to the end portion of the opening of a hollow member without causing separation of the lid section due to change with time, impact or the like. <P>SOLUTION: The lid section mounting structure is a structure for securing the lid section 2 for closing the opening section at the end of a hollow member 1 on the hollow member 1 formed by axially extending an inner wall 4 defining a hollow 5. At the end portion of the hollow member 1, recessed sections 6 are formed and the lid section 2 is engaged with the recessed sections 6 from the direction orthogonal to the axial direction of the hollow member 1 to be secured on the hollow member 1 immovably in the axial direction of the hollow member 1. Thus, the lid section 2 can be tightly mounted on the hollow member 1 while being prevented from separating from the hollow member 1. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a lid mounting structure for attaching a lid to an opening of a cylindrical hollow member having a plurality of cavities therein.

2. Description of the Related Art Conventionally, a technique has been provided in which cellulose fine particles and a resin are mixed and melted and extruded into a cylindrical shape (see, for example, Patent Document 1). In this technique, at the time of extrusion molding, an inner wall extending in the axial direction is formed in the molded product at the same time as molding, thereby forming a plurality of cavities in the molded product. A hollow member having such a hollow part is used as a material for furniture such as a deck material, a table or a chair, for example.
JP 2002-18925 A

  By the way, when the hollow member as described above is used as a material such as a deck material, the open end of the hollow member is closed with a lid in order to prevent foreign matter, rainwater, or the like from entering the hollow member. However, the structure for attaching the lid to the hollow member is not disclosed in the publication. Usually, it is conceivable to attach a plate-like lid to the opening end of such a hollow member by bonding. However, in the case of bonding, there is a problem that the lid is easily peeled off due to secular change or impact.

  The present invention has been made in view of the above circumstances, and it is intended to provide a lid mounting structure capable of firmly mounting a lid portion on an opening end portion of a hollow member without peeling off due to secular change or impact. It is an issue.

In order to solve the above-mentioned problem, the invention described in claim 1 includes, for example, as shown in FIGS. 1 and 2, a plurality of hollow portions 5 extending in a plurality of axial directions inside a cylindrical main body portion 3. A cover part mounting structure for attaching a cover part 2 for closing an opening of an end part of the hollow member 1 to a hollow member 1 formed by extending an inner wall part 4 forming an axial direction,
A concave portion 6 is formed at the end of the hollow member 1,
The lid portion 2 is attached to the hollow member 1 so as to be immovable in the axial direction of the hollow member 1 by engaging with the concave portion 6 from a direction orthogonal to the axial direction of the hollow member 1. Features.

  According to the invention described in claim 1, the lid portion 2 is engaged with the concave portion 6 from a direction orthogonal to the axial direction of the hollow member 1, whereby the shaft of the hollow member 1 is engaged with the hollow member 1. Since it is attached so as not to move in the direction, the lid 2 can be firmly attached to the hollow member 1 while preventing the lid 2 from being peeled off from the hollow member 1. The lid 2 can be further firmly attached to the hollow member 1 if the lid 2 and the recess 6 are engaged together with the bonding.

As shown in FIGS. 3 and 4, for example, the invention according to claim 2 is a lid portion that attaches a lid portion 12 that closes an opening portion of the hollow member 11 to a cylindrical hollow member 11. Mounting structure,
A recess 16 is formed at the end of the hollow member 11,
The lid portion 12 is attached to the hollow member 11 so as to be immovable in the axial direction of the hollow member 11 by engaging with the concave portion 16 from a direction orthogonal to the axial direction of the hollow member 11. Features.

  According to the invention described in claim 2, the lid portion 12 is engaged with the concave portion 16 from a direction orthogonal to the axial direction of the hollow member 11, whereby the shaft of the hollow member 11 is engaged with the hollow member 11. Since it is attached so as not to move in the direction, the lid 12 can be firmly attached to the hollow member 11 while being prevented from being peeled off from the hollow member 11. If the lid 12 and the recess 16 are engaged together with the engagement, the lid 12 can be further firmly attached to the hollow member 11.

The invention according to claim 3 is, for example, as shown in FIGS. 9 and 10, in the lid mounting structure according to claim 1 or 2,
A bottom recess 45 is formed at the bottom of the recess 6;
The lid portion 42 is attached to the hollow member 1 so as to be immovable in the axial direction of the hollow member 1 by engaging with the concave portion 6 and the bottom concave portion 45 from a direction orthogonal to the axial direction of the hollow member 1. It is characterized by.

  According to the third aspect of the present invention, since the lid portion 42 is engaged with both the concave portion 6 and the bottom concave portion 45, the lid portion 42 can be firmly attached to the hollow member 1.

The invention according to claim 4 is the lid mounting structure according to any one of claims 1 to 3, for example, as shown in FIGS.
The surface of the lid portion 2 and the end surface 1a of the hollow member 1 are substantially flush with each other.

  According to the invention described in claim 4, since the surface of the lid portion 2 and the end surface 1 a of the hollow member 1 are substantially flush with each other, a force acts directly on the lid portion 2 from the side surface side of the hollow member 1. Therefore, it is difficult to peel the lid portion 2 from the hollow member 1.

The invention according to claim 5 is, for example, as shown in FIGS. 5 and 6, in the lid mounting structure according to any one of claims 1 to 3,
The surface of the lid portion 22 is formed in a convex curved surface shape, and the edge 22c of the surface and the edge 1c of the outer surface of the hollow member 1 substantially coincide with each other.

  According to the invention described in claim 5, since the edge 22c of the surface of the lid portion 22 and the edge 1c of the outer surface of the hollow member 1 are substantially coincident, the surface of the lid portion 22 is the outer surface of the hollow member 1. Therefore, there is no step in the connecting portion between the lid portion 22 and the hollow member 1, and the finish is excellent.

The invention according to claim 6 is the lid mounting structure according to any one of claims 1 to 5,
Among the hollow member and the lid portion, at least the hollow member is a plate-like member obtained by mixing and extruding a cellulose fine powder and a resin.

  Here, the cellulosic fine particles are, for example, raw material raw material coarsely pulverized material of various plant cell bodies in, for example, a coarsely pulverized product of wood, a ground pulverized product of bacas, a coarsely pulverized product of rice straw, etc. It can be obtained by grinding.

  The grinding process refers to a process having both a grinding process and a polishing process. Even if the grinding process and the polishing process are performed at the same time, the grinding process is performed after the grinding process. The process which consists of may be sufficient. In other words, the grinding treatment referred to here is, as will be described later, a pulverization process from a coarsely pulverized product to a finely pulverized product, and finely pulverized powder particles entangled with each other in a fiber state, and the surface is covered with cilia. It refers to a process that combines a polishing process in which the surface is polished so that the surface has a small amount of cilia from the broken powder shape.

  The cellulose-based fine particles are formed into a particle size by grinding as described above, so that protruding portions on the cilia like normal wood flour are reduced, and water (including moisture), solvent, etc. It becomes difficult to adsorb.

  The resin is a hard resin or a soft resin, and vinyl chloride resin, foamed vinyl chloride resin, polyethylene resin, polypropylene resin, phenol resin, urethane resin, polyurethane resin, ABS resin, polystyrene resin, etc. are used. However, among them, vinyl chloride resin, polyethylene resin, and polypropylene resin are suitable for forming a molded member.

  According to the sixth aspect of the present invention, at least the hollow member is formed by mixing and extruding the cellulose fine particles and the resin, so that the hollow member can be provided with waterproofness, antiseptic properties and wood texture. it can. Moreover, since it is what was extrusion-molded, a cavity part can be easily formed in the inside of a hollow member in the case of extrusion molding.

  As described above, according to the first aspect of the present invention, the lid is engaged with the concave portion of the hollow member from the direction orthogonal to the axial direction of the hollow member, whereby the shaft of the hollow member is engaged with the hollow member. Since it is attached so as not to move in the direction, the lid can be firmly attached to the hollow member while preventing the lid from being peeled off from the hollow member.

  According to the second aspect of the present invention, the lid portion is attached to the hollow member so as to be immovable in the axial direction of the hollow member by engaging the concave portion of the hollow member from the direction orthogonal to the axial direction of the hollow member. Therefore, the lid portion can be firmly attached to the hollow member while preventing the lid portion from being peeled off from the hollow member.

  According to the invention described in claim 3, since the lid portion is engaged with both the concave portion and the bottom concave portion of the hollow member, the lid portion can be firmly attached to the hollow member.

  According to the invention described in claim 4, since the surface of the lid portion and the end surface of the hollow member are substantially flush with each other, it is difficult for a force to act directly on the lid portion from the side surface side of the hollow member. Peeling of the lid portion from the hollow member can be prevented.

  According to the invention of claim 5, since the edge of the surface of the lid portion and the edge of the outer surface of the hollow member are substantially coincident, the surface of the lid portion is continuously connected to the outer surface of the hollow member, Therefore, there is no step in the connecting portion between the lid and the hollow member, and the finish is excellent.

  According to the sixth aspect of the present invention, the hollow member can be provided with waterproofness, antiseptic properties and wood texture. Moreover, since it is what was extrusion-molded, a cavity part can be easily formed in the inside of a hollow member in the case of extrusion molding.

Embodiments of the present invention will be described below with reference to the drawings.
(First embodiment)
1 and 2 show a first embodiment. In these drawings, reference numeral 1 denotes a hollow member, and reference numeral 2 denotes a lid.
The hollow member 1 includes a main body portion 3 having a rectangular tube shape and two inner wall portions 4 formed inside the main body portion 3. The inner wall portion 4 extends in the axial direction of the main body portion 3, and three hollow portions 5 extending in the axial direction are formed in the main body portion 3 by the inner wall portion 4. Such a hollow member 1 is obtained by mixing and extruding cellulose fine particles (wood powder) and a resin, and the inner wall portion 4 is formed simultaneously with the extrusion.

  A recess 6 is formed at the end of the hollow member 1. The recess 6 has a groove shape formed by notching the end surface of the hollow member 1 in a trapezoidal cross section, and both end portions of the recess 6 are open to the side end surface of the hollow member 1. Further, the inner side surfaces 6 a, 6 a of the concave portion 6 facing each other are inclined surfaces that are gradually separated toward the bottom surface of the concave portion 6.

  The lid 2 has a rectangular plate shape, and its long side is equal to the length of the recess 6, and its short side is equal to the width of the recess 6. Both side surfaces 2 a and 2 a along the long side direction of the lid portion 2 are inclined surfaces that gradually separate toward the back surface of the lid portion 2, and the inclination angle thereof is the inner side surfaces 6 a and 6 a of the concave portion 6. It is equal to. Further, the thickness of the lid 2 is equal to the depth of the recess 6.

The lid portion 2 is attached to the hollow member 1 so as not to move in the axial direction of the hollow member 1 by engaging with the concave portion 6 from a direction orthogonal to the axial direction of the hollow member 1. That is, by sliding the lid 2 into the recess 6 while sliding in the direction of the arrow, the side surfaces 2a, 2a of the lid 2 are engaged with the inner surfaces 6a, 6a of the recess 6, thereby It is attached so as not to move in the axial direction (upward in FIGS. 1 and 2).
In this case, on the side surface 2a and the back surface of the lid 2, the inner surface 6a and the bottom surface of the recess 6 (in FIGS. 1 and 2, the upper end surface of the inner wall portion 4 of the hollow member 1 and the upper end surface of the side wall of the hollow member 1). After the adhesive is applied, the lid portion 2 is engaged with the concave portion 6 by engaging the lid portion 2 with the concave portion 6, thereby being bonded.
Further, in a state where the lid 2 is attached to the hollow member 1, the surface of the lid 2 and the end surface 1 a of the hollow member 1 are substantially flush with each other.

Thus, in 1st Embodiment, the cover part 2 is attached to the recessed part 6 of the hollow member 1 from the direction orthogonal to an axial direction, and is attached immovably to the axial direction of the hollow member 1. Therefore, it is possible to prevent the lid portion 2 from being peeled off from the hollow member 1 and to attach it firmly.
Further, since the surface of the lid portion 2 is substantially flush with the end surface 1a of the hollow member 1, it is difficult for a force to act directly on the lid portion 2 from the side surface side of the hollow member. The peeling from the member 1 can be prevented.
Furthermore, since the hollow member 1 and the lid part 2 are formed by mixing cellulose-based fine particles and resin and extrusion molding, the hollow member 1 and the lid part 2 can be provided with waterproofness, antiseptic properties and wood texture. it can. Moreover, since it is what was extrusion-molded, the cavity part 5 can be easily formed in the inside of the hollow member 1 in the case of extrusion molding.

(Second Embodiment)
3 and 4 show a second embodiment. In these drawings, reference numeral 11 denotes a hollow member, and reference numeral 12 denotes a lid.
The hollow member 11 has a cylindrical shape, and a hollow portion 15 extending in the axial direction is formed therein. Such a hollow member 11 is formed by mixing cellulose fine particles (wood powder) and a resin and extrusion-molding them.
A recess 16 is formed at the end of the hollow member 11. The recess 16 has a groove shape formed by cutting out the end surface of the hollow member 11 into a trapezoidal cross section, and both end portions of the recess 16 are open to the outer surfaces of the hollow member 11 facing each other. . Further, the inner side surfaces 16 a and 16 a of the concave portion 16 that face each other are inclined surfaces that are gradually separated toward the bottom surface of the concave portion 16.

  The lid portion 12 is a plate-like portion in which the portions facing each other in the outer peripheral portion of the disc are cut in a straight line in parallel, and the diameter of the disc before cutting is equal to the diameter of the end face of the hollow member 11. It has become. Further, the opposite side surfaces 12 a and 12 a of the lid portion 12 are inclined surfaces that are gradually separated from each other toward the back surface of the lid portion 12, and the inclination angles thereof are the inner side surfaces 6 a and 6 a of the concave portion 16. It is equal to. Further, the thickness of the lid 12 is equal to the depth of the recess 16.

The lid portion 12 is attached to the hollow member 11 so as not to move in the axial direction of the hollow member 11 by engaging with the concave portion 16 from a direction orthogonal to the axial direction of the hollow member 11. That is, by inserting the lid 12 into the recess 16 while sliding in the direction of the arrow, the side surfaces 12a, 12a of the lid 12 are engaged with the inner surfaces 16a, 16a of the recess 16, thereby It is attached so as not to move in the axial direction (upward in FIGS. 3 and 4).
In this case, an adhesive is applied to the side surface 12a and back surface of the lid portion 12 and the inner side surface 16a and bottom surface of the recess portion 16 (in FIG. 3 and FIG. 4, the upper end surface of the side wall of the hollow member 11). By engaging with the recess 16, the lid 12 is engaged with and bonded to the recess 16.
Further, in a state where the lid 12 is attached to the hollow member 11, the surface of the lid 12 and the end surface 11 a of the hollow member 11 are substantially flush with each other.

As described above, in the second embodiment, similarly to the first embodiment, the lid 12 engages the concave portion 16 of the hollow member 11 from the direction orthogonal to the axial direction, so that the hollow member 11 is engaged. Since the lid portion 12 is attached so as not to move in the axial direction, the lid portion 12 can be firmly attached to the hollow member 11 without being peeled off.
Further, since the surface of the lid portion 12 is substantially flush with the end surface 11a of the hollow member 11, it is difficult for a force to act directly on the lid portion 12 from the side surface side of the hollow member. The peeling from the member 11 can be prevented.
Furthermore, since the hollow member 11 and the lid portion 12 are formed by mixing and extruding the cellulose fine particles and the resin, the hollow member 11 and the lid portion 12 can be provided with waterproofness, antiseptic properties, and wood texture. it can. Moreover, since it is extrusion-molded, the cavity 15 can be easily formed inside the hollow member 11 during extrusion molding.

(Third embodiment)
5 and 6 show a third embodiment. In these drawings, the difference from the first embodiment shown in FIG. 1 and FIG. 2 is the configuration of the lid portion 22, so that this point will be described in detail below, and other common parts are denoted by the same reference numerals. Therefore, the description is omitted.

The lid portion 22 is formed in a substantially bowl shape, and an engagement portion 22a that engages with the recess portion 6 formed on the end surface of the hollow member 1 and a lid that is formed integrally with the engagement portion 22a. It is comprised with the part main body 22b. The surface of the lid main body 22b is formed in a convex curved surface shape, and the edge 22c of this surface coincides with the edge 1c of the side surface 1b of the outer surface of the hollow member 1. Further, the end surface 22 d of the lid portion 22 is substantially flush with the other side surface 1 d of the hollow member 1.
Further, the opposite side surfaces 22e, 22e of the engaging portion 22a are inclined surfaces that are gradually separated from each other toward the back surface of the lid portion 22, and the inclination angle is determined by the inner side surface 6a, It is equal to 6a. Further, the thickness of the engaging portion 22a is equal to the depth of the concave portion 6.

  Such a lid portion 22 is made immovable in the axial direction of the hollow member 1 by engaging the engaging portion 22a with the concave portion 6 from a direction orthogonal to the axial direction of the hollow member 1. It is attached. That is, by sliding the lid portion 22 in the direction of the arrow and inserting the engaging portion 22a into the concave portion 6, the side surfaces 22e and 2e of the engaging portion 22a engage with the inner side surfaces 6a and 6a of the concave portion 6. Thus, the hollow member 1 is attached so as not to move in the axial direction (the upward direction in FIGS. 5 and 6).

  Further, in the state where the lid portion 22 is attached to the hollow member 1, the edge 22 c on the surface of the lid portion main body 22 b coincides with the edge 1 c of the side surface 1 b of the hollow member 1.

  In the third embodiment, the same effects as those of the first embodiment can be obtained, and the edge 22c on the surface of the lid portion 22 and the edge 1c on the side surface 1b of the hollow member 1 are substantially the same. Since they coincide with each other, the surface of the lid portion 22 is continuously connected to the side surface 1b of the hollow member 1, so that there is no step in the connecting portion between the lid portion 22 and the hollow member 1, and the finish is excellent.

(Fourth embodiment)
7 and 8 show a fourth embodiment. In these drawings, the difference from the second embodiment shown in FIG. 3 and FIG. 4 is the configuration of the lid portion 32. Therefore, this point will be described in detail below, and the other components are denoted by the same reference numerals. Therefore, the description is omitted.

The lid portion 32 is formed in a substantially hemispherical shape, and an engagement portion 32a that engages with the recess portion 16 formed on the end surface of the hollow portion member 11 and a lid that is formed integrally with the engagement portion 32a. It is comprised with the part main body 32b. The surface of the lid main body 32b is formed in a hemispherical shape, and the edge 32c of this surface coincides with the edge 11c of the outer surface 11b of the hollow member 11.
Further, the opposite side surfaces 32e and 32e of the engaging portion 32a are inclined surfaces that gradually separate from each other toward the back surface of the lid portion 32, and the inclination angle is determined by the inner side surfaces 6a and It is equal to 6a. Further, the thickness of the engaging portion 32a is equal to the depth of the concave portion 6.

  Such a lid portion 32 is made immovable in the axial direction of the hollow member 11 by engaging the engaging portion 32a with the concave portion 16 from a direction orthogonal to the axial direction of the hollow member 11. It is attached. That is, by sliding the lid portion 32 in the direction of the arrow and inserting the engaging portion 32a into the concave portion 16, the side surfaces 32e and 32e of the engaging portion 32a engage with the inner side surfaces 16a and 16a of the concave portion 16. Thus, the hollow member 11 is attached so as not to move in the axial direction (the upward direction in FIGS. 7 and 8).

  Further, in the state where the lid portion 32 is attached to the hollow member 11, the edge 32 c of the surface of the lid body 32 b coincides with the edge 11 c of the outer surface 11 b of the hollow member 11.

  In the fourth embodiment, the same effects as those of the second embodiment can be obtained, and the edge 22c of the surface of the lid portion 32 and the edge 11c of the outer surface 11b of the hollow member 11 are provided. Since the surface of the lid part 32 is continuously connected to the outer surface 11b of the hollow member 11 because they substantially coincide, there is no step at the connection part between the lid part 32 and the hollow member 11, and the finish is excellent. Become.

(Fifth embodiment)
9 and 10 show a fifth embodiment. In these drawings, the differences from the first embodiment shown in FIGS. 1 and 2 are the configuration of the lid portion 42 and the point that the bottom recess 45 is formed in the hollow member 1. Explanation will be given, and the other common parts will be denoted by the same reference numerals and description thereof will be omitted.

  First, a bottom recess 45 is formed at the bottom of the recess 6 of the hollow member 1. In the present embodiment, the bottom of the recess 6 is the upper end surface of the inner wall 4 of the hollow member 1 and the upper end surface of the side wall that forms the side surface 1d of the hollow member 1. Is formed. The bottom concave portion 45 is formed by cutting out the upper end portion of the inner wall portion 4 and the upper end portion of the side wall of the hollow member 1 into a trapezoidal cross section, and the inner side surfaces 45a and 45a of the bottom concave portion 45 facing each other are The inclined surface is gradually separated toward the bottom surface of the bottom recess 46.

  The lid portion 42 is formed by forming an engaging portion 46 that engages with the bottom recess 45 on the lower surface of the lid portion 2, and the opposite side surfaces 46 a and 46 a of the engaging portion 46 are opposite to each other. The inclined surface gradually separates toward the back surface of the bottom surface, and the inclination angle thereof is equal to the inner side surfaces 45a and 45a of the bottom recess 45. Further, the thickness of the engaging portion 46 is equal to the depth of the bottom recess 45.

Such a lid portion 42 engages the lid portion 2 with the concave portion 6 from a direction perpendicular to the axial direction of the hollow member 1, and the engaging portion 46 engages with the bottom concave portion 45 in the axial direction of the hollow member 1. Is engaged with the hollow member 1 so as to be immovable in the axial direction of the hollow member 1. That is, by sliding the lid portion 42 in the direction of the arrow and inserting it into the concave portion 6 and the bottom concave portion 45, the side surfaces 2a, 2a of the lid portion 2 engage with the inner side surfaces 6a, 6a of the concave portion 6. The side surfaces 46a, 46a of the joint portion 46 engage with the inner side surfaces 45a, 45a of the bottom recess 45, and are thereby mounted so as not to move in the axial direction of the hollow member 1 (upward in FIGS. 9 and 10).
Further, in a state where the lid portion 42 is attached to the hollow member 1, the surface of the lid portion 42 and the end surface 1 a of the hollow member 1 are substantially flush with each other.

  In the fifth embodiment, the lid 42 is engaged with both the recess 6 and the bottom recess 45 as well as the same effect as that of the first embodiment. The lid 42 can be firmly attached to the hollow member 1.

  In the fifth embodiment, the surface of the lid 42 is formed flat, but the lid 42 may be formed in a bowl-shaped curved surface as shown in FIGS. 5 and 6, for example.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a main part showing a first embodiment of the present invention and showing a lid part and a hollow member. It is a front view of the principal part which shows the state which attached the cover part to the hollow member. The 2nd Embodiment of this invention is shown and it is a perspective view of the principal part which shows a cover part and a hollow member. It is a front view of the principal part which shows the state which attached the cover part to the hollow member. The 3rd Embodiment of this invention is shown and it is a perspective view of the principal part which shows a cover part and a hollow member. It is a front view of the principal part which shows the state which attached the cover part to the hollow member. The 4th Embodiment of this invention is shown and it is a perspective view of the principal part which shows a cover part and a hollow member. It is a front view of the principal part which shows the state which attached the cover part to the hollow member. The 5th Embodiment of this invention is shown and it is a perspective view of the principal part which shows a cover part and a hollow member. It is a front view of the principal part which shows the state which attached the cover part to the hollow member.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1,11 Hollow part 2,22,42 Lid part 3 Main body part 4 Inner wall part 5 Cavity part 6,16 Recessed part 2 Recessed part 45 Bottom recessed part 1 Hand scanner housing

Claims (6)

A hollow member formed by extending in the axial direction an inner wall portion forming a plurality of axially extending cavities inside the cylindrical main body, and an opening at the end of the hollow member A lid mounting structure for mounting a lid for closing
A recess is formed at the end of the hollow member,
The lid part is attached to the hollow member so as to be immovable in the axial direction of the hollow member by engaging the concave part from a direction orthogonal to the axial direction of the hollow member. Mounting structure. It is an attachment structure of a lid part for attaching a lid part that closes the opening part of the end part of the hollow member to a hollow member that has a cylindrical shape,
A recess is formed at the end of the hollow member,
The lid part is attached to the hollow member so as to be immovable in the axial direction of the hollow member by engaging the concave part from a direction orthogonal to the axial direction of the hollow member. Mounting structure. In the lid mounting structure according to claim 1 or 2,
A bottom recess is formed at the bottom of the recess,
The lid portion is attached to the hollow member so as to be immovable in the axial direction of the hollow member by engaging the concave portion and the bottom concave portion from a direction orthogonal to the axial direction of the hollow member. The lid mounting structure. In the attachment structure of the cover part as described in any one of Claims 1-3,
The lid mounting structure, wherein a surface of the lid and an end surface of the hollow member are substantially flush with each other. In the attachment structure of the cover part as described in any one of Claims 1-3,
The lid part mounting structure is characterized in that a surface of the lid part is formed in a convex curved surface, and an edge of the surface substantially coincides with an edge of the outer surface of the hollow member. In the attachment structure of the cover part as described in any one of Claims 1-5,
Of the hollow member and the lid portion, at least the hollow member is a plate-shaped one formed by mixing cellulose-based fine particles and a resin and extrusion-molding the lid mounting structure.

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