Lid mounting structure

Abstract

To provide a fitting structure of a lid which is easily attachable to a box such as a fuel filler, a charge port and so on and is excellent in durability.SOLUTION: In a fitting structure of a lid, a cap attachment part 38 protruding in a cylindrical shape with a circular shape in cross section of internal surface is formed at a position where engaged with a concave part 26 of an arm part 21 on a lateral surface of an arm part reception part 37, and the cap attachment part 38 is formed with a wall part 50 which protrudes from an apex 39 in an outside region from an inner surface in the apex 39 of the cap attachment part 38, a cap 40 comprises: a trunk 41, which penetrates through an inner surface of the cap attachment part 38 and is inserted into the concave part 26 of the arm part 21; and a flange part 42, which is formed on a tip end portion of the trunk 41 and includes wall part opposite surface 47 capable of opposing to the wall part 50 in substantially parallel and at the same time engages with the apex 39 of the cap attachment part 38, the cap is fitted into the cap attachment part 38, so as to prevent the cap 40 from being rotated within the cap attachment part 38 by a wall part 50 and at the same time so as to attach a lid fitting member 20 to a box 30.SELECTED DRAWING: Figure 5

Description

[Technical Field]

[0001] The present invention relates to a mounting structure for an openable and closable lid that covers a fuel filler port, a charging port, or the like of a vehicle body such as an automobile. [Background technology]

[0002] When refueling or filling an automobile fuel tank with fuel such as gasoline or hydrogen, the fuel filler cap or filler lid that covers the fuel filler or filler port on the vehicle body is opened, the fuel cap is removed, and fuel is filled through the filler port, or a filler plug is inserted into the filler port to fill hydrogen. Furthermore, when charging an electric vehicle or PHV (plug-in hybrid vehicle), the charging lid is opened, the cap of the quick charge port or normal charge port is removed, and the charging connector is inserted into the charge port to charge.

[0003] For example, when filling a fuel tank for an automobile, as shown in Figure 1, a lid (fuel filler lid) 110 that covers a fuel filler opening 101 provided on a vehicle body is opened, and fuel is filled through the fuel filler opening 101. A lid mounting member 200 is attached to the back surface of the lid 110, and the lid mounting member 200 is attached to a box (fuel filler box) 300. The lid 110 is then attached to the lid mounting member 200.

[0004] As shown in Figures 2 and 3, the lid mounting member 200 has a large curved arm portion 210 that enables the lid 110 to be opened and closed. In order to ensure sufficient space for the arm portion 210 to open and close within the box 300, the center of rotation of the arm portion 210 is located laterally further back than the fuel filler opening 101, and is engaged with the box 300 at the center of rotation.

[0005] As a lid attachment structure that utilizes engagement between arm portion 210 and box 300, the technology disclosed in Patent Document 1 will be described with reference to Figures 4 and 11. As shown in Figure 4, a cylindrical recess 260 is formed in side surface 210a at the tip of arm portion 210. This recess 260 serves as the center of rotation of arm portion 210.

[0006] 11, a cap mounting portion (recess receiving portion) 380 that protrudes in a cylindrical shape and has an opening at its top is formed on a side surface 370a of arm portion storage portion 370 of box 300 at a position that matches recess 260 of arm portion 210. A tip groove 380a is formed at the tip portion of cap mounting portion 380.

[0007] Then, by fitting a cap 400, which penetrates the cap mounting portion 380 and is inserted into the recess 260 of the arm portion 210, into the cap mounting portion 380 on the side surface 370a of the arm portion storage portion 370 of the box 300, the arm portion 210 of the lid mounting member 200 and the arm portion storage portion 370 of the box 300 are engaged with each other.

[0008] The cap 400 comprises a cylindrical body 410 and a cylindrical flange 420 formed at the tip of the body 410 and having a diameter larger than that of the body 410. An engaging protrusion 440 is formed at the bottom of the flange 420 at a position that matches the tip groove 380a of the cap attachment part 380.

[0009] The cap 400 is fixed to the cap mounting portion 380 by the engagement between the tip groove portion 380a of the cap mounting portion 380 and the engaging protrusion 440 of the cap 400, thereby preventing the cap 400 from rotating within the cap mounting portion 380 due to the rotation of the arm portion 210 accompanying the opening and closing of the lid 110. [Prior art documents] [Patent documents]

[0010] [Patent Document 1] Patent Publication No. 2021-24393 Summary of the Invention [Problem to be solved by the invention]

[0011] In the above-mentioned Patent Document 1, the position of the engaging protrusion 440 of the cap 400 must be confirmed from the side of the cap 400 before the tip groove 380a of the cap attachment portion 380 and the engaging protrusion 440 of the cap 400 can be engaged, which requires time for alignment. Furthermore, when the arm portion 210 rotates in conjunction with the opening and closing of the lid 110, a load is applied between the tip groove 380a of the cap attachment portion 380 and the engaging protrusion 440 of the cap 400, causing stress concentration. This raises concerns that the tip groove 380a and / or the engaging protrusion 440 may be damaged due to the stress concentration. Therefore, the present invention provides a lid attachment structure that is easy to attach to a box such as a fuel filler port or a charging port, and has excellent durability. [Means for solving the problem]

[0012] In order to solve the above problems, the present invention of claim 1 provides a lid mounting structure in which a lid mounting member is attached to a lid that covers a fuel filler port or a charging port or the like of a vehicle body, and a box having an opening is attached to the fuel filler port or the charging port or the like of the vehicle body, and by attaching the lid mounting member to the box, the lid can be opened and closed, the lid mounting member has a lid mounting part for mounting the lid and an arm part that is curved and extended from the lid mounting part, and a cylindrical recess is formed on at least one side of the tip portion of the arm part, the box has a box main body part including the opening and an arm part storage part that is extended from the box main body part, and a cap mounting part that protrudes in a cylindrical shape with a circular cross section on the inner surface of the side of the arm part storage part is formed at a position that engages with the recess of the arm part, and the cap mounting part has a cap that protrudes from the inner surface of the top of the cap mounting part to an outer region. Rectangular shaped A wall is formed, When the cap mounting part is viewed from above, a circular opening is formed in a D-shape, the wall part corresponds to the vertical straight part of the D-shape, the outer surface on the side where the wall part is not formed is also circular, and the length of the long side of the wall part is the same as the diameter of the outer surface of the cap mounting part, The body portion penetrates the inner surface of the cap mounting portion and is inserted into the recess of the arm portion. The body portion has a wall-facing surface formed at the tip portion of the body portion, which is substantially parallel to the wall portion and can face the wall portion, and which engages with the top of the cap mounting portion. D-shaped Cap with flange The wall facing surface of the vertical straight part of the D-shape the cap attachment part Wall Wall According to the inside surfaceThis is a lid mounting structure characterized in that by fitting the cap, the wall portion prevents the cap from rotating within the cap mounting portion and the lid mounting member is attached to the box.

[0013] In the present invention of claim 1, a cylindrical recess is formed on at least one side of the tip of the arm, and the box has a box main body including an opening and an arm storage section extending from the box main body, and a cap mounting section that protrudes in a cylindrical shape with a circular inner cross section is formed on the side of the arm storage section at a position where it engages with the recess of the arm, and the cap mounting section has a cap that protrudes from the top of the cap mounting section to an outer region from the inner surface at the top of the cap mounting section. Rectangular shaped A wall is formed, When the cap mounting part is viewed from above, a circular opening is formed in a D-shape, the wall part corresponds to the vertical straight part of the D-shape, the outer surface on the side where the wall part is not formed is also circular, and the length of the long side of the wall part is the same as the diameter of the outer surface of the cap mounting part, The body portion penetrates the inner surface of the cap mounting portion and is inserted into the recess of the arm portion. The body portion has a wall-facing surface formed at the tip portion of the body portion, which is substantially parallel to the wall portion and can face the wall portion, and which engages with the top of the cap mounting portion. D-shaped Has a flange Fit the wall-facing surface of the D-shaped vertical straight part of the cap into the inner wall surface of the cap mounting part. So, first, Easier positioning .

[0014] Secondly, the wall of the cap mounting portion and the opposing wall surface of the cap prevent the cap from rotating within the cap mounting portion, thereby preventing or minimizing stress concentration when the arm portion rotates, thereby improving the durability of the engagement between the cap and the cap mounting portion.

[0017] In addition, the flange of the cap D shape The arcuate shape opposite the vertical straight portion is not limited to an arcuate shape, and may be a shape in which straight portions are continuous. In other words, it is sufficient if the shape of the cap allows the portion of the wall-facing surface to be clearly distinguished from the outside.

[0018] Claim 2 The present invention is as defined in claim 1In the invention, the wall portion of the cap attachment portion is formed across the top, and in a plane perpendicular to the protruding direction of the cap attachment portion, the flange portion of the cap has a length of a line segment OA from the center O of the body portion to an intersection point A with a line perpendicular to the wall facing surface, and a length of a line segment OB from A to an intersection point B with the arc-shaped portion on the opposite side of the center O, where: a The lid mounting structure satisfies b≦b.

[0019] Claim 2 In the present invention, the wall of the cap mounting part is formed across the top, and in a plane perpendicular to the protruding direction of the cap mounting part, the length of the line segment OA between the center O of the body and the intersection point A with a line perpendicular to the wall facing surface of the cap is a, and the length of the line segment OB between the center O and the intersection point B with the arc-shaped part on the opposite side of A across the center O is b, so a≦b. Therefore, the wall of the cap mounting part is formed close to the inner surface of the cap mounting part, and it is possible to prevent the weight of the cap mounting part from increasing as the wall part moves away from the inner surface of the cap mounting part and the size of the flange of the cap from increasing. c This means that the relationship c≦a holds.

[0020] Claim 3 The invention of claim 1 or Claim 2 In the invention, the lid mounting member Arm The tip of The side opposite to the side where the cap is inserted has a cylindrical protrusion , the side where the cap is fitted The recess is formed coaxially with the recess formed on the side surface of the On the side opposite to the side where the cap attachment part of the arm storage part is formed, The arm guide portion that guides the convex portion is formed to protrude, and a convex portion receiving portion in which the convex portion is stored is formed at the tip of the arm guide portion, and the lid mounting structure is such that the convex portion of the arm portion engages with the convex portion receiving portion of the arm guide portion.

[0021] Claim 3 In the invention, the lid mounting member Arm The tip of The side opposite to the side where the cap is inserted has a cylindrical protrusion , the side where the cap is fitted The recess is formed coaxially with the recess formed on the side surface of the On the side opposite to the side where the cap attachment part of the arm storage part is formed,The arm guide portion that guides the convex portion is formed to protrude, and a convex portion receiving portion in which the convex portion is stored is formed at the tip portion of the arm guide portion, and the convex portion of the arm portion engages with the convex portion receiving portion of the arm guide portion.Therefore, when attaching the arm member to the box, the cylindrically protruding convex portion can be inserted along the arm member guide portion, and the arm member can be easily assembled in the arm member storage portion of the box that is formed toward the inside of the vehicle body at the back of the box and is not directly visible. [Effects of the Invention]

[0022] A cylindrical recess is formed on at least one side of the tip of the arm, and the box has a box main body including an opening and an arm storage section extending from the box main body, and a cap mounting section that protrudes in a cylindrical shape with a circular inner cross section is formed on the side of the arm storage section at a position that engages with the recess of the arm, and the cap mounting section has a cap that protrudes from the top of the cap mounting section to an outer region from the inner surface at the top of the cap mounting section. Rectangular shaped A wall is formed, When the cap mounting part is viewed from above, a circular opening is formed in a D-shape, the wall part corresponds to the vertical straight part of the D-shape, the outer surface on the side where the wall part is not formed is also circular, and the length of the long side of the wall part is the same as the diameter of the outer surface of the cap mounting part, The body portion penetrates the inner surface of the cap mounting portion and is inserted into the recess of the arm portion. The body portion has a wall-facing surface formed at the tip portion of the body portion, which is substantially parallel to the wall portion and can face the wall portion, and which engages with the top of the cap mounting portion. D-shaped Has a flange Fit the wall-facing surface of the D-shaped vertical straight part of the cap into the inner wall surface of the cap mounting part. So, first, Easier positioning .

[0023] Secondly, the wall of the cap mounting portion and the opposing wall surface of the cap prevent the cap from rotating within the cap mounting portion, thereby preventing or minimizing stress concentration when the arm portion rotates, thereby improving the durability of the engagement between the cap and the cap mounting portion. [Brief explanation of the drawings]

[0024] [Figure 1] FIG. 2 is a perspective view of the fuel filler opening with the lid open. [Figure 2] 2 is a cross-sectional view illustrating the positional relationship between the box, the lid, and the lid attachment member (cross-sectional view taken along line XX in FIG. 1). [Figure 3]2 is an enlarged cross-sectional view of the arm portion of the lid attachment member and the arm portion housing portion of the box (cross-sectional view taken along line XX in FIG. 1). [Figure 4] FIG. 1 is a perspective view of one side of the tip portion of an arm portion, showing an embodiment of the present invention. [Figure 5] FIG. 10 is a perspective view of one side of the arm storage section, illustrating the embodiment of the present invention, and is a perspective view illustrating the relationship between the cap and the cap mounting section. [Figure 6] FIG. 6 is a perspective view of the state in which the cap is fitted into the cap mounting portion in FIG. 5. [Figure 7] 7 is a cross-sectional view taken along the line YY in FIG. 6. [Figure 8] FIG. 10 is a perspective view of the other side of the arm storage section, showing the embodiment of the present invention. [Figure 9] FIG. 10 is a perspective view of the other side of the tip portion of the arm portion, showing the embodiment of the present invention. [Figure 10] 7. FIG. 10 is a cross-sectional view of the arm unit of FIG. 9 attached to the arm unit storage unit of FIG. [Figure 11] FIG. 10 is a perspective view illustrating the relationship between a cap and a cap mounting portion in a conventional lid mounting structure. DETAILED DESCRIPTION OF THE INVENTION

[0025] The following embodiment describes the mounting structure of a lid 10 (fuel filler cap) that closes the fuel filler opening 1 of the vehicle body 2 and can be opened and closed, but it can also be used when filling hydrogen by inserting a filling plug into the filling port or when charging an electric vehicle or a PHV (plug-in hybrid vehicle).

[0026] As shown in Figure 1, lid 10 is formed to fit the shape of fuel filler opening 1 in order to close the fuel filler opening 1 of vehicle body 2. When filling a fuel tank for an automobile, lid 10 that closes fuel filler opening 1 provided on vehicle body 2 is opened and fuel is filled through fuel filler opening 1. A lid mounting member 20 is attached to the back surface of lid 10, and lid mounting member 20 is attached to box 30.

[0027] 2 and 3, the lid mounting member 20 has a lid mounting portion 22 that is attached to the lid 10, and a large, curved, arc-shaped arm portion 21 that enables the lid 10 to be opened and closed. The lid mounting portion 22 also has a lid lock portion 23 that engages with a lock pin 32 of the box 30, which will be described later. The lid 10 and the lid mounting member 20 may also be formed integrally.

[0028] The box 30 attached to the vehicle body 2 has a box main body 31 with an opening 36 at the fuel filler opening 1, and an arm storage section 37 that stores the arm 21 of the lid mounting member 20. In order to ensure space for opening and closing the arm 21 within the box 30, the arm storage section 37 is formed to be recessed further inward (to the left in Figures 2 and 3) than the box holding section 3 that holds the box main body 31 to the vehicle body 2. Therefore, the center of rotation of the arm 21 engages with the arm storage section 37 at a portion of the arm storage section 37 that is laterally deeper than the lid 10.

[0029] A lock pin 32 is formed on the box body 31 on the side opposite the arm storage section 37 of the box 30, and when the lid 10 is closed, the lock pin 32 engages with the lid lock section 23 of the lid mounting member 20 to lock the lid 10. When the lid 10 is opened, the lock pin 32 of the box 30 retracts and disengages from the lid lock section 23 of the arm section 21.

[0030] A sealing member 33 is attached around the upper end of the box main body portion 31, and when the box main body portion 31 is attached to the box holding portion 3 of the vehicle body 2, it seals the gap between the vehicle body 2 and the upper end of the box main body portion 31.

[0031] As shown in Fig. 4, a cylindrical recess 26 is formed on one side surface 21a of the tip portion of arm portion 21 of lid mounting member 20. Furthermore, as shown in Figs. 5 to 7, a cap mounting portion 38 is formed on one side surface 37a of arm portion storage portion 37 at a position that matches recess 26 of arm portion 21. The cap mounting portion 38 has a cylindrical protrusion with a circular inner cross section and an opening at its top 39.

[0032] The cap mounting portion 38 has a rectangular parallelepiped-shaped wall portion 50 that protrudes from the top 39 of the cap mounting portion 38, extending from the inner surface 38f of the cap mounting portion 38 on the top 39 of the cap mounting portion 38 to the outer region in the direction in which the cap mounting portion 38 protrudes from the arm portion housing portion 37. The wall portion 50 is not limited to a rectangular parallelepiped shape. The outer surface on the side of the cap mounting portion 38 where the wall portion 50 is not formed also has a circular cross section, and when viewed from above, the cap mounting portion 38 has a D-shape with a circular opening formed within it. In other words, the wall portion 50 corresponds to the vertical straight portion of the D. The length of the long side of the wall portion 50 is the same as the diameter of the outer surface of the cap mounting portion 38. The length of the long side of the wall portion 50 may be longer or shorter than the diameter of the outer surface of the cap mounting portion 38.

[0033] 5, the wall portion inner surface 51 of the wall portion 50 on the inner surface 38f side of the cap mounting portion 38 is formed in a straight line in a plane perpendicular to the protruding direction of the cap mounting portion 38. Note that the wall portion inner surface 51 may not be straight, but may be an arc shape with a larger diameter than the inner surface 38f of the cap mounting portion 38, or may be an arc shape that curves in the opposite direction. Furthermore, the wall portion inner surface 51 may be an angular shape with a series of straight lines, or a shape where arc shapes and straight lines are mixed.

[0034] 5, in this embodiment, the wall inner surface 51 is the top 39 of the cap mounting portion 38 and protrudes from a position where it contacts the inner surface 38f of the cap mounting portion 38. Therefore, the wall inner surface 51 is tangent to the inner surface 38f when the cap mounting portion 38 is viewed from above. Note that the wall inner surface 51 may be formed in an area outside the inner surface 38f of the cap mounting portion 38 at the top 39 of the cap mounting portion 38. However, as the wall inner surface 51 moves away from the inner surface 38f of the cap mounting portion 38 at the top 39 of the cap mounting portion 38, the linear portion in the vertical direction of the D-shape becomes longer, which increases the weight of the cap mounting portion 38. Furthermore, the flange 42 of the cap 40, which will be described in detail later, must also be formed large. Therefore, it is desirable to form the wall inner surface 51 of the wall 50 close to the inner surface 38f of the cap mounting portion 38.

[0035] As shown in Figures 5 and 7, an inner surface 38f of the cap attachment portion 38 is formed with a small diameter portion 38b formed on the arm portion 21 side, a large diameter portion 38d having a diameter larger than that of the small diameter portion 38b, and an inclined portion 38c connecting the small diameter portion 38b and the large diameter portion 38d, all of which are coaxially formed, and an inner groove portion 38e is formed circumferentially in the large diameter portion 38d and coaxially with the large diameter portion 38d.

[0036] 5 to 7, cap 40 penetrates cap mounting portion 38 of arm housing portion 37 and is inserted into, engaged with, and fitted into recess 26 of arm portion 21. Cap 40 has a body portion 41 that penetrates cap mounting portion 38 and a flange portion 42 that engages with top portion 39 of cap mounting portion 38. The diameter of flange portion 42 of cap 40 is larger than the diameter of body portion 41.

[0037] The body 41 is coaxially formed with a first body 41a that penetrates the small diameter portion 38b of the cap mounting portion 38 and is inserted into the recess 26 of the arm portion 21 to engage with the arm portion 21, a second body 41b that penetrates the large diameter portion 38d of the cap mounting portion 38, and a third body 41c that penetrates the inclined portion 38c of the cap mounting portion 38.

[0038] Additionally, the second body portion 41b is formed with an engaging protrusion 43 that engages with the inner groove 38e of the cap mounting portion 38. The engaging protrusion 43 is formed at a position that matches the inner groove 38e of the cap mounting portion 38 when the cap 40 is fitted into the cap mounting portion 38. The engaging protrusion 43 engages with the inner groove 38e of the cap mounting portion 38, thereby preventing the cap 40 from coming off the cap mounting portion 38 even when the arm portion 21 rotates.

[0039] Furthermore, as shown in FIG. 7, a seal portion 46 is formed circumferentially on the third body portion 41c, with its tip portion protruding in a tapered shape. The shape of the seal portion 46 has an outer surface with a convex arc shape and is shaped to approach the first body portion 41a downward. On the other hand, the inner surface is formed substantially parallel to the first body portion 41a. As a result, when the tip of the seal portion 46 contacts the inclined portion 38c of the cap mounting portion 38 of the arm portion storage portion 37 and the cap 40 is further pushed in, it deforms so as to bend toward the first body portion 41a along the inclination of the inclined portion 38c and elastically contacts the inclined portion 38c, reliably sealing the space between the seal portion 46 and the inclined portion 38c.

[0040] Also, a cavity portion 45 having an opening on the flange portion 42 side is formed in the first body portion 41a, the second body portion 41b, and the third body portion 41c. This cavity portion 45 allows the cap 40 itself to undergo a slight deformation in the inner direction, facilitating the fitting of the cap 40 into the cap mounting portion 38. At the same time, the weight of the cap 40 can be reduced. Note that the cavity portion 45 of the cap 40 may not be formed and the cap may be solid.

[0041] Also, when the cap 40 is viewed from above, the flange portion 42 is formed in a D shape, and the wall portion facing surface 47 corresponds to the vertical straight portion of the D shape. As described above, since the inner wall surface 51 of the wall portion 50 of the cap mounting portion 38 protrudes from the position where it contacts the inner surface 38f of the cap mounting portion 38, in the flange portion 42 of the cap 40, when the length of the line segment AO from the center O of the body portion 41 to the intersection point A with the line perpendicular to the wall portion facing surface 47 is a, and the length of the line segment OB from the center O to the intersection point B with the arc-shaped portion on the opposite side of A is b, in this embodiment, a < b. Here, a = b when the wall portion facing surface 47 of the flange portion 42 is formed to be the tangent of the outer surface of the cap mounting portion 38.

[0042] It is desirable that the wall-facing surface 47 of the cap 40 and the inner wall surface 51 of the wall 50 of the cap mounting portion 38 abut on each other when the cap 40 is mounted on the cap mounting portion 38, but it is within the scope of the present invention to form a gap that takes into account the molding tolerances in order to prevent problems that prevent mounting due to molding tolerances between the cap mounting portion 38 and the cap 40, and this gap does not affect the effects of the present invention. However, if the gap between the inner wall surface 51 of the wall 50 of the cap mounting portion 38 and the wall-facing surface 47 of the cap 40 becomes larger than the above tolerance, the rotation range of the cap 40 becomes larger, increasing the possibility of stress concentration, which is undesirable.

[0043] On the other hand, as shown in Figures 8 to 10, an arm guide portion 34 is formed protruding from the other side surface 37b of the arm storage portion 37, which guides the cylindrical protrusion 25 formed on the other side surface 21b of the arm portion 21 from the box main body portion 31, and a protrusion receiving portion 35 is formed at the tip portion of the arm guide portion 34, which engages with the protrusion 25 of the arm portion 21.

[0044] The width of the arm guide portion 34 through which the protrusion 25 of the arm portion 21 passes is formed slightly larger than the diameter of the protrusion 25, making it easier for the protrusion 25 to pass through. In addition, the connecting portion between the arm guide portion 34 and the protrusion receiving portion 35 is formed with a narrow portion 34a recessed on both sides so that the width is slightly smaller than the diameter of the protrusion 25. By pressing the protrusion 25 into the narrow portion 34a, the narrow portion 34a bends slightly to allow the protrusion 25 to pass through, thereby fitting the protrusion 25 into the protrusion receiving portion 35 and preventing the protrusion 25 from coming off the protrusion receiving portion 35. The width of the protrusion receiving portion 35 of the arm guide portion 34 is formed to be approximately the same as the diameter of the protrusion 25, making it possible to prevent the protrusion 25 from shifting within the protrusion receiving portion 35.

[0045] In addition, a protrusion 34b having an inclined surface on the box main body 31 side is formed from the outer surface of the location where the narrow width portion 34a of the connecting portion between the arm portion guide portion 34 of the arm portion storage portion 37 and the protrusion receiving portion 35 is formed in the inward direction (direction perpendicular to the narrow width portion 34a).

[0046] As shown in Figure 9, a cylindrical protrusion 25 is formed on one side surface 24a of the box mounting portion 24 of the arm portion 21, coaxially with a recess 26 formed on the opposite side surface. In addition, a sloped protrusion surface 25a is formed at the tip of the protrusion. The sloped protrusion surface 25a makes it easier for the protrusion 25 to climb over the protrusion 34b of the arm portion guide portion 34, making it easier to mount the arm portion 21 on the protrusion receiving portion 35 of the box 30. Note that the sloped protrusion surface 25a does not necessarily have to be formed.

[0047] In this embodiment, the lid mounting member 20 is made of nylon, and the cap 40 is made of PP (polypropylene). The body 41 (polypropylene) of the cap 40 is inserted into the recess 26 (nylon) of the box mounting part 24, and the box mounting part 24 rotates, but because the two parts are made of different materials, the engaged body 41 of the cap 40 and the recess 26 of the box mounting part 24 can be prevented from wearing out and becoming loose over time. Note that the materials of the lid mounting member 20 and the cap 40 need only be different, and are not limited to the above-mentioned nylon and PP.

[0048] Next, the attachment of the arm portion 21 of the lid mounting member 20 to the arm portion storage portion 37 of the box 30 will be described below. First, the tip portion of the arm portion 21 is inserted into the arm portion storage portion 37 from the box main body portion 31 side of the box 30. At the same time, the protrusion 25 of the box mounting portion 24 is inserted into the arm portion guide portion 34 of the arm portion storage portion 37.

[0049] When the protrusion 25 of the box mounting portion 24 is slid along the arm portion guide portion 34, the protrusion 25 comes into contact with a narrow portion 34a recessed on both sides so that the width is slightly smaller than the diameter of the protrusion 25, and a protrusion 34b protruding inward (in a direction perpendicular to the narrow portion 34a). When the protrusion 25 is further pressed, the narrow portion 34a bends slightly, and the protrusion 25 passes over the protrusion 34b and enters the protrusion receiving portion 35 located further back. At this time, a recess 26 is formed coaxially on the side surface 21b opposite the box mounting portion 24 on which the protrusion 25 is formed, and a cap mounting portion 38 is formed on the side surface 37a of the opposing arm portion storage portion 37.

[0050] Next, after aligning the wall-facing surface 47 of the cap 40 with the direction of the wall 50 formed on the cap mounting portion 38, the body 41 of the cap 40 is inserted from the first body 41a side. The first body 41a passes through the large diameter portion 38d, the inclined portion 38c, and the small diameter portion 38b of the cap mounting portion 38, and is inserted into the recess 26 of the arm portion 21. Before or after (or after) the arm portion 21 is inserted into the recess 26, the engaging protrusion 43 formed on the second body 41b of the cap 40 abuts against the tip of the cap mounting portion 38.

[0051] When the cap 40 is further pressed in, the engaging protrusion 43 bends and slides within the large diameter portion 38d, and the flange 42 of the cap 40 comes into contact with the top 39 of the cap mounting portion 38, stopping the sliding movement.

[0052] Furthermore, when the engaging protrusion 43 slides further within the second body 41b, the seal portion 46 formed on the third body 41c of the cap 40 comes into contact with the inclined portion 38c of the cap mounting portion 38, curves and bends, and elastically contacts the inclined portion 38c.

[0053] As a result, by aligning the wall-facing surface 47 of the cap 40 with the direction of the wall portion 50 formed on the cap mounting portion 38 and pushing the cap 40 into the cap mounting portion 38, the wall inner surface 52 of the wall portion 50 formed on the cap mounting portion 38 and the wall-facing surface 47 of the flange portion 42 of the cap 40 come into contact or are close to each other, thereby fixing the cap 40 to the cap mounting portion 38, making it easy to attach the cap 40. Furthermore, since the cap 40 can be prevented from rotating within the cap mounting portion 38 due to the rotation of the arm portion 21 accompanying the opening and closing of the lid 10, stress concentration when the arm portion 21 rotates can be prevented or minimized. This improves the durability of the engagement between the cap 40 and the cap mounting portion 38.

[0054] Furthermore, the engaging protrusion 43 formed on the side of the second body portion 41b of the body portion 41 engages with the inner groove portion 38e of the cap mounting portion 38, thereby preventing the cap 40 from coming off the cap mounting portion 38 of the arm portion storage portion 37 due to opening and closing of the lid 10 or vibrations during travel, etc.

[0055] Furthermore, since the sealing portion 46 formed on the third body portion 41c of the cap 40 elastically contacts the inclined portion 38c of the cap mounting portion 38, even if water enters the box mounting portion 24 side from between the flange portion 42 of the cap 40 and the cap mounting portion 38, water can be prevented from entering between the recess 26 of the box mounting portion 24 and the first body portion 41a of the cap 40.

[0056] The present invention is not limited to the above-described embodiment, and various modifications are possible without departing from the object of the present invention.

[0057] For example, in the above embodiment, a cap mounting section 38 is formed on one side of the arm section storage section 37, and no cap mounting section 38 is formed on the other side, but cap mounting sections 38 may be attached to both sides, and the arm section 21 may be engaged with the arm section storage section 37 on both sides using caps 40.

[0058] For example, in the above embodiment, the wall portion 50 is formed in a linear manner at one location on the top 39 of the cap mounting portion 38, but it may be formed in two locations perpendicular or parallel, and the wall-facing surface 47 of the cap 40 may be formed to match the arrangement of the wall portion 50.

[0059] For example, in the above embodiment, the body 41 of the cap 40 and the inner surface 38f of the cap attachment portion 38 are shaped as shown in FIGS. 5 and 7, but they may also be shaped as shown in the background art (FIG. 11).

[0060] For example, in the above embodiment, the cap mounting portion 38 and the flange 42 of the cap 40 have the same shape in a plane perpendicular to the protruding direction of the cap mounting portion 38, but the cap mounting portion 38 may have a different shape from the flange 42 of the cap 40, such as a rectangular pillar or pyramid. In this case, it is desirable from the perspective of mounting the cap 40 that the shape of the wall portion 50 be such that the position of the wall portion 50 can be clearly identified externally. [Explanation of symbols]

[0061] 10 Lid 20 Lid mounting member 21 Arm section 26 Recess 30 boxes 31 Box body 37 Arm storage compartment 38 Cap attachment part 38f Inside 39 Top 40 Cap 41 Torso 42 Tsuba 47 Wall facing surface 50 Wall 51 Inner surface of wall

Claims

1. A lid mounting structure in which a lid mounting member is attached to a lid that covers a fuel filler port, a charging port, or the like of a vehicle body, and a box having an opening is attached to the fuel filler port, the charging port, or the like of the vehicle body, and the lid can be opened and closed by attaching the lid mounting member to the box, the lid mounting member has a lid mounting portion to which the lid is attached and an arm portion that extends in a curved manner from the lid mounting portion, and a cylindrical recess is formed on at least one side surface of a tip portion of the arm portion; the box has a box body including the opening and an arm housing extending from the box body, a cap mounting portion that protrudes in a cylindrical shape with a circular inner cross section is formed on a side surface of the arm portion storage portion at a position that engages with the recess of the arm portion; The cap mounting portion has a rectangular parallelepiped wall portion formed in an outer region from the inner surface at the top of the cap mounting portion, the wall portion protruding from the top, When the cap mounting portion is viewed from above, a circular opening is formed in a D-shape, the wall portion corresponds to the vertical linear portion of the D-shape, the outer surface on the side where the wall portion is not formed is also circular, and the length of the long side of the wall portion is the same as the diameter of the outer surface of the cap mounting portion, A lid mounting structure characterized in that the cap has a body portion that penetrates the inner surface of the cap mounting portion and is inserted into the recess of the arm portion, and a wall-facing surface formed at the tip portion of the body portion that can face the wall portion approximately parallel to the wall portion and a flange portion formed in a D-shape that engages with the top of the cap mounting portion, and the wall-facing surface of the vertical straight portion of the D-shape of the cap is fitted into the inner wall surface of the wall portion of the cap mounting portion, thereby preventing the cap from rotating within the cap mounting portion and attaching the lid mounting member to the box.

2. The wall portion of the cap mounting portion is formed across the top, and in a plane perpendicular to the protruding direction of the cap mounting portion, the flange portion of the cap has a length of a line segment OA from the center O of the body portion to the intersection A with a line perpendicular to the wall opposing surface, and a length of a line segment OB from the center O of the body portion to the intersection B with the arc-shaped portion on the opposite side of A across the center O, where a≦b.

3. a cylindrical protrusion is formed on a side surface of the tip portion of the arm portion of the lid mounting member opposite to the side where the cap is fitted, the protrusion being coaxial with the recess formed on the side where the cap is fitted; an arm guide portion for guiding the convex portion is formed to protrude from a side surface of the arm portion storage portion opposite to the side surface on which the cap mounting portion is formed, and a convex portion receiving portion for receiving the convex portion is formed at a tip end portion of the arm guide portion; 3. The lid mounting structure according to claim 1, wherein the protrusion of the arm engages with the protrusion receiving portion of the arm guide.

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