Lid mounting structure

Abstract

To provide a lid mounting structure that facilitates mounting of a lid and can eliminate rattling during mounting.SOLUTION: A box mounting part recessed portion 26 in a cylindrical shape is formed on at least one side surface of a box mounting part 24, and a recessed portion receiving part 38, protruded in a cylindrical shape with a circular cross section to a position matching the box mounting part recessed portion 26, in which a zigzag-shaped uneven portion 39 is formed over that whole circumference of a tip part thereof, is formed on a side surface of an arm member storage part 37. A lid 10 is openably and closably mounted on the arm member storage part 37, by embedding a cap 40 which has a trunk part 41 that penetrates through the recessed portion receiving part 38 and can be inserted into the box mounting part recessed portion 26 and engaged therewith and a flange part 42, formed at a tip portion of the trunk part 41, in which a protrusion portion 43 that can engage with the uneven portion 39 of the recessed portion receiving part 38 is formed.SELECTED DRAWING: Figure 9

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 vehicle. [Background technology]

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

[0003] This type of lid Mounting Structure The technology disclosed in Patent Document 1 will be described with reference to Figures 1 to 5. An arm member 20 is attached to the back surface 12 of a lid 10, which is a fuel filler cap. The arm member 20 is a plate curved in an arc, and has a box attachment part 24 at its tip, which is the part that is attached to a box 30 (fuel filler box).

[0004] As shown in Fig. 4, the box mounting portion 24 of the arm member 20 is formed with a box engagement pin 250 of the arm member 20 that engages with the arm member engagement portion 350 of the box 30 (Fig. 3). The box engagement pin 250 is formed on both side surfaces of the tip of the box mounting portion 24.

[0005] 1 and 2, box 30 has a box main body 31 having a fuel filler hole 36 (opening) at the center of the bottom for inserting a fuel gun that communicates with fuel filler port 1 of vehicle body 2, and an arm member storage section 37 for storing arm member 20, and box 30 is attached to box holding section 3 of vehicle body 2 via seal member 33. Arm member storage section 37 is formed to extend further inside vehicle body 2 (left side in FIG. 1) than the portion of vehicle body 2 where box holding section 3 is formed.

[0006] As shown in FIG. 3, arm member storage section 37 is formed with arm member guide section 34 that guides box engagement pin 250 of arm member 20 to arm member engagement section 350, and arm member engagement section 350 that engages with box engagement pin 250 of arm member 20 is formed at the tip portion of arm member guide section 34.

[0007] Since the arm member guide portion 34 is formed, when the arm member 20 is attached to the box 30, the box engaging pin 250 of the arm member 20 is inserted into the arm member guide portion 34 and slid, so that the arm member 20 can be easily assembled to the box 30 even if it is difficult to see the back of the arm member storage portion 37 of the box 30. [Prior art documents] [Patent documents]

[0008] [Patent Document 1] JP 2019-85060 A Summary of the Invention [Problem to be solved by the invention]

[0009] In the above-mentioned Patent Document 1, an arm member guide portion 34 is formed in the arm member storage portion 37 of the box 30, and a box engagement pin 250 of the arm member 20 passes through the arm member guide portion 34, thereby making it easy to attach the lid 10 to the box 30. However, because a clearance is required between the arm member guide portion 34 and the box engagement pin 250, the arm member 20 may rattle inside the arm member engagement portion 350 of the arm member storage portion 37 after attachment, making it difficult to close the lid 10. [Means for solving the problem]

[0010] In order to solve the above problem, the present invention of claim 1 provides: Fuel filler, charging or filling port on the vehicle The lid that covers the box has an arm member on which a box mounting portion is formed, Fuel filler, charging or filling port on the vehicle a box having a box main body portion with an opening and an arm member storage portion for storing an arm member, and a lid mounting structure for mounting the lid to the arm member storage portion so that the lid can be opened and closed around the box mounting portion, wherein a cylindrical box mounting portion recess is formed on at least one side of the box mounting portion, and a recess receiving portion is formed on the side of the arm member storage portion, the recess receiving portion protruding into a cylindrical shape with a circular cross section at a position matching the box mounting portion recess and having a zigzag-shaped uneven portion formed all around its tip, and the lid is attached to the arm member storage portion so that it can be opened and closed by fitting a cap having a body portion that penetrates the recess receiving portion and can be inserted into the box mounting portion recess to engage with it, and a flange portion formed on the tip of the body portion and having a protrusion formed with a protrusion that can engage with the uneven portion of the recess receiving portion.

[0011] In the present invention of claim 1, a cylindrical box mounting recess is formed on at least one side of the box mounting part, and a cylindrically protruding recess receiving portion with a circular cross section is formed on the side of the arm member storage part at a position that matches the box mounting part recess of the box mounting part, and a lid having an arm member can be attached to the arm member storage part of the box by fitting a cap that penetrates the recess receiving portion of the arm member storage part on the box mounting part and is inserted into and engages with the box mounting part recess of the box mounting part, thereby preventing the arm member from rattling inside the arm member storage part.

[0012] In addition, the tip of the recessed receiving part is formed with a zigzag-shaped uneven portion formed all around, and the flange of the cap is formed with a protrusion that can engage with the zigzag-shaped uneven portion, so that even if the body of the cap is inserted into the recessed receiving part without checking the position of the protrusion formed on the flange, the protrusion can be engaged with the zigzag-shaped uneven portion of the recessed receiving part. As a result, the cap can be easily attached.

[0013] Here, a "zigzag shape" refers to a line shape that angles to the left, then to the right, then to the left again, then to the right, etc. at regular intervals, turning back each time to bend in the opposite direction. The "zigzag shape" of the present invention also includes a line shape in which the corners of the convex parts of an uneven portion are gently curved, a line shape in which the corners of the concave parts of an uneven portion are gently curved, or a wavy line in which the corners of both the convex parts and concave parts of an uneven portion are gently curved.

[0014] The present invention of claim 2 is a lid mounting structure in which, in the invention of claim 1, each concave and each convex portion of the concave-convex portion of the concave receiving portion has the same shape when viewed from the side of the concave receiving portion and is formed alternately and continuously.

[0015] In the present invention of claim 2, the recesses and protrusions of the concave-convex portion of the concave-convex portion have the same shape when viewed from the side, and are alternately and continuously formed, so that the protrusions formed on the flange can be securely engaged at any position of the concave-convex portion. As a result, the cap can be attached very easily.

[0016] The present invention of claim 3 is the lid mounting structure of claim 2, wherein the protrusion of the cap has a shape similar to the recess of the concave-convex portion of the concave-convex portion when the cap is viewed from the side.

[0017] In the present invention of claim 3, the protrusion of the cap has a shape similar to the recess of the uneven portion of the recess receiving portion when the cap is viewed from the side, so that at least one of the inclined surfaces of the protrusion can be abutted against the inclined surface of the recess of the uneven portion. As a result, rattling of the cap in the circumferential direction can be suppressed. From the viewpoint of suppressing rattling, it is desirable that the protrusion of the cap has a similar shape to the extent that it can fit into the recess of the uneven portion of the recess receiving portion with as few gaps as possible.

[0018] The present invention of claim 4 is a lid mounting structure according to claim 1 or 3, wherein the protrusions of the cap are formed in a plurality of positions slightly shifted from the point-symmetric positions in the circumferential direction.

[0019] When multiple protrusions are formed on a cap, if they are formed at point-symmetrical positions in the circumferential direction, the tip of the protrusion may come into contact with the tip of the convex part of the uneven part when the cap is lightly pressed to insert it into the concave receiving part. In this case, since the protrusion cannot move along either of the slopes of the convex part of the uneven part, the protrusion and the uneven part cannot be reliably engaged unless the cap is intentionally rotated.

[0020] In the present invention of claim 4, the protrusions of the cap are formed in a plurality of positions slightly shifted from the point-symmetrical positions in the circumferential direction, so that even if one tip portion of the protrusions and the uneven portion abuts against each other, the other tip portions do not abut against each other. As a result, when the cap is lightly pressed against the recessed receiving portion, a force is applied to the side of the flange where the tip portions are not abutting, and a circumferential rotational force naturally acts on the cap, so that the abutting tip portions move and the abutting state of the tip portions is released, so that the protrusions and the uneven portion can be engaged, and the cap can be attached reliably.

[0021] The present invention of claim 5 is an attachment structure for a lid in accordance with the inventions of claims 1 to 4, in which a circumferential groove is formed on the inner surface of the recess receiving portion of the arm member storage portion, and an engaging protrusion is formed on the outer surface of the body of the cap at a position which matches the groove of the recess receiving portion when the uneven portion and the protrusion engage, and in which the groove and the engaging protrusion engage.

[0022] In the present invention of claim 5, a circumferential groove is formed on the inner surface of the recessed receiving portion of the arm member storage portion, and an engaging protrusion is formed on the outer surface of the body of the cap at a position that matches the groove of the recessed receiving portion when the uneven portion and the protrusion engage, and since the groove and the engaging protrusion engage with each other, it is possible to prevent the cap from coming off the recessed receiving portion of the arm member storage portion due to opening and closing of the lid, vibration during travel, etc. The engaging protrusion of the cap may be formed circumferentially like the circumferential inner groove formed in the recessed receiving portion of the arm member storage portion, or may be formed partially at a position that matches the circumferential inner groove of the arm member storage portion, for example, in a line or dot shape.

[0023] The present invention of claim 6 is a lid according to the invention of claims 1 to 5, wherein the body of the cap is a lid in which a through-hole penetrating the recessed receiving portion of the arm member storage portion and an insertion portion having a diameter smaller than that of the through-hole and inserted into the recessed portion of the box mounting portion of the box mounting portion are formed coaxially. Mounting Structure It is.

[0024] When inserting the cap into the box mounting recess of the box mounting part, it is necessary to check the position of the box mounting recess of the box mounting part from the recess receiving part side of the arm member storage part. If the diameter of the box mounting recess of the box mounting part is the same as the inner diameter of the recess receiving part of the arm member storage part, it is difficult to check the position of the box mounting recess of the box mounting part.

[0025] In the present invention of claim 6, the body of the cap is formed coaxially with a through portion that penetrates the recess receiving portion of the arm member storage portion and an insertion portion having a diameter smaller than the width of the through portion that is inserted into the box mounting portion recess of the box mounting portion, so that the position of the box mounting portion recess of the box mounting portion can be easily confirmed from the recess receiving portion of the arm member storage portion, improving the workability of inserting the cap into the box mounting portion recess of the box mounting portion.

[0026] The present invention of claim 7 is a lid mounting structure according to claims 1 to 6, in which the cap and box mounting portion are made of different materials.

[0027] If the cap and the box mounting portion are made of the same material, both the engaged cap and the box mounting portion recess of the box mounting portion are prone to wear. In the present invention of claim 6, the cap and the box mounting portion are made of different materials, so that it is possible to prevent both the engaged cap and the box mounting portion recess of the box mounting portion from wearing away and causing rattling over time. Effect of the Invention

[0028] A cylindrical box mounting portion recess is formed on at least one side of the box mounting portion, and a cylindrically protruding recess receiving portion with a circular cross section is formed on the side of the arm member storage portion at a position that matches the box mounting portion recess of the box mounting portion, and a lid having an arm member can be attached to the arm member storage portion of the box by fitting a cap that penetrates the recess receiving portion of the arm member storage portion on the box mounting portion and is inserted into and engages with the box mounting portion recess of the box mounting portion, thereby preventing the arm member from rattling inside the arm member storage portion.

[0029] In addition, the tip of the recessed receiving part is formed with a zigzag-shaped uneven portion formed all around, and the cap is formed with a protrusion that can engage with the zigzag-shaped uneven portion, so that even if the body of the cap is inserted into the recessed receiving part without checking the position of the protrusion formed on the flange, the protrusion can be engaged with the zigzag-shaped uneven portion of the recessed receiving part. As a result, the cap can be easily attached. [Brief description of the drawings]

[0030] [Figure 1] 4 is a cross-sectional view of the box, the lid, and the arm member with the lid open. FIG. [Diagram 2] 2 is an enlarged cross-sectional view of the vicinity of an arm housing portion in FIG. 1. [Diagram 3] 13 is a perspective view of one side of the arm member storage portion. FIG. [Figure 4] FIG. 2 is a perspective view of one side of the box mounting portion. [Diagram 5] 4 is a cross-sectional view of the vicinity of a box mounting protrusion (box engagement pin) of the box mounting portion. FIG. [Figure 6] FIG. 11 is a perspective view of the other side of the box mounting portion of the arm member, showing the embodiment of the present invention. [Figure 7] 13A is a perspective view illustrating the relationship between the cap and a recessed receiving portion on the other side surface of the arm member storage portion according to an embodiment of the present invention, and FIG. 13B is an enlarged perspective view of the recessed receiving portion. [Figure 8]FIG. 1 is a cross-sectional view of the vicinity of a recessed receiving portion of an arm member storage portion according to a first embodiment of the present invention. [Figure 9] FIG. 1 shows a first embodiment of the present invention, in which (a) is a state in which the protrusion of the cap abuts the convex portion of the concave-convex portion of the concave-convex portion, and (b) is a side view of the vicinity of the concave receiving portion with the cap fitted in place. [Figure 10] FIG. 11 is a cross-sectional view of the vicinity of a recess receiving portion of an arm member storage portion according to a second embodiment of the present invention. [Figure 11] 11 is a cross-sectional view seen from the direction A in FIG. 10. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0031] The following embodiment will be described with respect to a mounting structure for a lid 10 (fuel filler cap) that closes and opens / closes a fuel filler port 1 of a vehicle body 2, but it can also be used as a filler port for filling a fuel cell vehicle with hydrogen, or as a charging port for charging an electric vehicle or a PHV (plug-in hybrid vehicle). Note that the same reference numbers will be used for the same parts as in the background art.

[0032] 1, the lid 10 is formed to match the shape of the fuel filler opening 1 in order to close the fuel filler opening 1 of the vehicle body 2. When filling a fuel tank for an automobile with fuel, the lid 10 that closes the fuel filler opening 1 provided on the vehicle body 2 is opened and fuel is filled through the fuel filler opening 1.

[0033] An arm member attachment portion 13 of the lid 10 is provided on the back surface 12 of the lid 10 to which an arm member 20, which is an attachment member of the lid 10, is attached. In this embodiment, the arm member attachment portion 13 of the lid 10 is formed as two parallel plates. The arm member attachment portion 13 is provided with an arm member attachment hole 14 of the lid 10 to which the arm member 20 is attached.

[0034] 1 and 2, the arm member 20 has an arc-shaped curved shape and has a lid mounting part 21 at one end that is attached to the lid 10, and a box mounting part 24 at the other end that is attached to the box 30. The lid 10 is attached to the arm member 20 by fitting the lid mounting part 21 into the arm member mounting hole 14 of the lid 10.

[0035] In addition, the lid 10 and the arm member 20 may be formed integrally, and the lid mounting portion 21 of the arm member 20 and the arm member mounting hole 14 of the lid 10 may be omitted, with the lid mounting portion 21 of the arm member 20 being formed integrally on the back surface 12 of the lid 10.

[0036] A lid locking portion 22 is formed at the tip of the lid mounting portion 21 of the arm member 20, extending toward the box 30. When the lid 10 is closed, the lid locking portion 22 engages with a lock pin 32 of the box 30, which will be described later.

[0037] Box 30 has a box main body 31 having a fuel filler hole 36 (opening) at the center of the bottom for inserting a fuel gun that communicates with fuel filler port 1 of vehicle body 2, and an arm member storage section 37 for storing arm member 20, and box 30 is attached to box holding section 3 of vehicle body 2 via seal member 33. Arm member storage section 37 is formed to be recessed further inside vehicle body 2 (left side in FIG. 1 ) than the portion of vehicle body 2 where box holding section 3 is formed. Details of arm member storage section 37 will be described later.

[0038] A lock pin 32 is formed on the side of the box 30 opposite the arm member storage section 37, and when the lid 10 is closed, the lock pin 32 engages with the lid lock section 22 of the arm 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 22 of the arm member 20.

[0039] A sealing member 33 is attached around the upper end of the box main body 31, which seals the gap between the box holding portion 3 and the upper end of the box main body 31 when the box main body 31 is attached to the box holding portion 3 of the vehicle body 2.

[0040] As shown in Figures 3 and 5, one side 37a of the arm member storage section 37 has an arm member guide section 34 protruding therefrom that guides the cylindrical box mounting section convex section 25 formed on the box mounting section 24 of the arm member 20 from the box main body section 31, and a protrusion receiving section 35 is formed at the tip portion of the arm member guide section 34 that engages with the cylindrical box mounting section convex section 25 formed on the box mounting section 24 of the arm member 20.

[0041] The width of the arm member guide 34 through which the box mounting protrusion 25 of the box mounting portion 24 passes is formed slightly larger than the diameter of the box mounting protrusion 25, so that the box mounting protrusion 25 can easily pass through. In addition, a narrow width portion 34a is formed at the connection portion between the arm member guide 34 and the protrusion receiving portion 35, with both sides recessed so that the width is slightly smaller than the diameter of the box mounting protrusion 25. The box mounting protrusion 25 is pressed into the narrow width portion 34a, and the narrow width portion 34a is slightly bent to allow the box mounting protrusion 25 to pass through, so that the box mounting protrusion 25 is fitted into the protrusion receiving portion 35 and the box mounting protrusion 25 is prevented from coming off the protrusion receiving portion 35. The width of the protrusion receiving portion 35 of the arm member guide 34 is formed to be approximately the same as the diameter of the box mounting protrusion 25, so that the displacement of the box mounting protrusion 25 within the protrusion receiving portion 35 is suppressed.

[0042] In addition, from the outer surface of the location where the narrow width portion 34a of the connection portion between the arm member guide portion 34 of the box 30 and the protrusion receiving portion 35 is formed, in the inward direction (in a direction perpendicular to the narrow width portion 34a), an arm member guide portion protrusion portion 34b having an inclined surface on the box main body portion 31 side is formed.

[0043] As shown in Fig. 4, a box mounting protrusion 25 is formed on one side surface 24a of the box mounting portion 24 of the arm member 20, protruding in a cylindrical shape. In addition, a protrusion slope 25a is formed at the tip portion of the box mounting protrusion 25, which is cut into a slanted shape. The protrusion slope 25a makes it easier for the box mounting protrusion 25 to climb over the arm member guide portion protrusion 34b of the arm member guide portion 34, making it easier to mount the arm member 20 to the protrusion receiving portion 35 of the box 30. Note that the protrusion slope 25a does not have to be formed.

[0044] On the other hand, as shown in Figure 6, on the other side 24b of the box mounting portion 24, a cylindrical box mounting portion concave portion 26 is formed coaxially with the box mounting portion convex portion 25 formed on the opposite side.

[0045] As shown in Figures 7(a) and 8, a cylindrically protruding recessed portion 38 with a circular cross section is formed on the other side surface 37b of the arm member storage portion 37 at a position that matches the box mounting portion recess 26 of the box mounting portion 24. Also, as shown in Figure 7(b), a zigzag-shaped uneven portion 39 is formed all around the tip portion of the recessed portion 38. Also, as shown in Figures 7(a), (b) and 8, an inner groove portion 38b is formed circumferentially on the inside of the recessed portion 38.

[0046] 7(b) and 9(a) and (b), in the present embodiment, the uneven portion 39 is formed in a shape of 12 equilateral triangles of the same size arranged in a row when the recess receiving portion 38 is viewed from the side, and therefore the shapes of the protrusions 39a and the recesses 39b are also equilateral triangles. Also, the tip portions of the protrusions 39a and the recesses 39b of the uneven portion 39 are formed in an arc shape.

[0047] The number of convex portions 39a (concave portions 39b) of the zigzag-shaped uneven portion 39 is not limited to 12, and the shape of the uneven portion 39 may be an isosceles triangle instead of an equilateral triangle, and the shape may not be symmetrical in side view. Furthermore, the tip portions of the convex portions 39a and the concave portions 39b of the uneven portion 39 do not have to be arc-shaped.

[0048] Moreover, the inside of the uneven portion 39 is chamfered so as not to interfere with the insertion of a body portion 41 of a cap 40, which will be described later.

[0049] 7(a) and 8, the cap 40 has a cylindrical body 41 that penetrates the recess receiving portion 38 of the arm member storage portion 37 and is inserted into and engaged with the box mounting portion recess 26 of the box mounting portion 24, and a flange portion 42 formed at the tip portion of the body 41. The diameter of the flange portion 42 of the cap 40 is larger than the diameter of the body 41.

[0050] Also, the length of the body 41 is set so as to abut against the bottom of the box mounting recess 26 of the box mounting part 24. As a result, when the cap 40 is inserted into the box mounting recess 26 of the box mounting part 24, the box mounting part protrusion 25 protruding in a cylindrical shape formed on one side surface 24a of the box mounting part 24 is pressed against the back side of the protrusion receiving part 35 of the arm member storing part 37 (the other side surface 37b side of the arm member storing part 37), and the box mounting part protrusion 25 and the protrusion receiving part 35 approach or abut against each other. Then, the clearance between the box mounting part protrusion 25 and the protrusion receiving part 35 becomes small or disappears, so that the box mounting part 24 can rotate in the protrusion receiving part 35 of the arm member storing part 37 without rattling.

[0051] 7(a) and 9(a) and (b), a protrusion 43 is formed on the body 41 side of the flange 42 to engage with a zigzag-shaped uneven portion 39 formed at the tip of the recessed portion receiving portion 38 of the arm member storage portion 37. As shown in FIGS. 9(a) and (b), the shape of the protrusion 43 is an equilateral triangle like the recessed portion 39b of the uneven portion 39, but is slightly smaller than the recessed portion 39b. The tip and base portions are formed in an arc shape. However, it does not have to be an arc shape.

[0052] As shown in Fig. 9(a), when the cap 40 is inserted into the recessed receiving portion 38, and for example the tip portion of the protrusion 43 abuts slightly to the right of the tip portion of the protrusion 39a of the uneven portion 39, the protrusion 43 moves while rotating circumferentially in the direction of the arrow by pushing the cap 40. Then, as shown in Fig. 9(b), the protrusion 39a of the uneven portion 39 abuts against the flange portion 42, and the insertion of the cap 40 is completed.

[0053] 9(b), the slope of convex portion 39a of concave-convex portion 39 (which is also the slope of concave portion 39b) and one of the slopes of protrusion portion 43 are both equilateral triangles of similar shape, so that they come into contact with each other and can prevent protrusion portion 43 from rattling within concave-convex portion 39 due to the rotation of arm member 20 accompanying the opening and closing of lid 10. Note that by making protrusion portion 43 as close in shape to concave-convex portion 39b as possible in consideration of assembly tolerances, rattling of protrusion portion 43 in the circumferential direction within concave-convex portion 39 can be minimized.

[0054] Also, an engaging protrusion 44 is formed on the side surface of the body 41 at a position that engages with the inner groove 38b of the recessed receiving portion 38. As a result, as shown in Fig. 8, the engaging protrusion 44 of the body 41 and the inner groove 38b of the recessed receiving portion 38 engage with each other, so that the cap 40 can be prevented from coming off the recessed receiving portion 38 of the arm member storage portion 37 due to vibrations during opening and closing of the lid 10 or during travel. Note that, although the engaging protrusion 44 of the cap 40 is formed circumferentially like the inner groove 38b of the recessed receiving portion 38 of the arm member storage portion 37 in Figs. 7(a) and 8, it may be formed partially, for example, in a line or dot shape, as long as it is in a position that matches the circumferential inner groove 38b of the recessed receiving portion 38 of the arm member storage portion 37.

[0055] The arm member 20 uses nylon, and the cap 40 uses PP (polypropylene). The body 41 (polypropylene) of the cap 40 is inserted into the box mounting recess 26 (nylon) of the box mounting part 24, and the box mounting part 24 rotates, but since both parts are made of different materials, it is possible to prevent both the body 41 of the cap 40 and the box mounting recess 26 of the box mounting part 24, which engage with each other, from wearing out and causing rattling over time. Note that the materials of the arm member 20 and the cap 40 may be different, and are not limited to the above-mentioned nylon and PP.

[0056] 10 and 11 show a second embodiment of the present invention. The second embodiment differs from the first embodiment in the following respects, and the other portions are the same as the first embodiment.

[0057] First, the inner diameter of the recess receiving portion 38 of the arm member storage portion 37 is larger than the diameter of the box mounting portion recess 26 of the box mounting portion 24. Second, the body portion 41 of the cap 40 is formed in two stages coaxially with a through portion 45 that passes through the protrusion receiving portion 35 of the arm member storage portion 37 and an insertion portion 46 that is smaller in diameter than the through portion 45 and is inserted into the box mounting portion recess 26 of the box mounting portion 24, and a step portion 48 is formed between the through portion 45 and the insertion portion 46. Third, the flange portion 42 of the cap 40 is formed with two protrusions 43, and the formation positions of the protrusions 43 are shifted from the point-symmetrical positions.

[0058] Due to the first and second differences, the position of the box mounting portion recess 26 of the box mounting portion 24 can be easily confirmed from the recess receiving portion 38 side of the arm member storage portion 37, improving the workability of inserting the cap 40 into the box mounting portion recess 26 of the box mounting portion 24.

[0059] The length of the through portion 45 is set so as to protrude from the recess receiving portion 38 of the arm member storage portion 37 into the arm member storage portion 37. In Fig. 10, the insertion portion 46 is depicted as abutting against the bottom of the box mounting portion recess 26 of the box mounting portion 24, but it does not have to abut.

[0060] As a result, when the cap 40 is inserted into the box mounting recess 26 of the box mounting part 24, the insertion part 46 is inserted into the box mounting recess 26 of the box mounting part 24, and the step part 48 between the through part 45 of the cap 40 and the insertion part 46 presses the box mounting part protrusion 25, which protrudes in a cylindrical shape formed on one side surface 24a of the box mounting part 24, against the back side of the protrusion receiving part 35 of the arm member storing part 37 (the other side surface 37b side of the arm member storing part 37), so that the box mounting part protrusion 25 and the protrusion receiving part 35 approach or come into contact with each other. Then, the clearance between the box mounting part protrusion 25 and the protrusion receiving part 35 becomes small or disappears, so that the box mounting part 24 can rotate without rattling within the protrusion receiving part 35 of the arm member storing part 37.

[0061] Due to the third difference, the flange 42 of the cap 40 has two protrusions 43 formed thereon, and the formation locations are shifted from the point-symmetrical positions, so that even if one tip portion X of the protrusion 43 abuts against the tip portion of the convex portion 39a of the uneven portion 39 in FIG. 11, the other tip portion Y of the protrusion 43 does not abut. In other words, the protrusion 43 having the tip portion Y is in a floating state above the concave portion 39b of the uneven portion 39. Therefore, when the cap 40 is lightly pressed against the concave receiving portion 38, a force is applied to the Y side where the tip portions are not abutting each other in the flange, and a circumferential rotational force naturally acts on the cap 40, so that the abutting tip portion X moves and the abutting state of the tip portions is released. As a result, the protrusion 43 and the uneven portion 39 can be engaged by simply pressing the cap 40 lightly against the concave receiving portion 38, and the cap 40 can be attached reliably.

[0062] 11, the protrusion 43 having the tip portion Y is formed to be shifted by 3 degrees (angle α) from the point symmetry position. Note that the shift from point symmetry is not limited to 3 degrees, and it is sufficient that the protrusion 43 having the tip portion Y can be inserted into the recess 39b of the uneven portion 39.

[0063] Furthermore, by making the protrusion 43 on the side having tip portion Y smaller by an amount equivalent to the angle α, when the protrusion 43 on the side having tip portion X engages with the uneven portion 39, the slope of the protrusion 43 on the side having tip portion Y abuts against the slope of the recess 39b of the uneven portion 39, thereby suppressing rattling of the protrusion 43 within the recess 39b.

[0064] 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.

[0065] For example, in the above embodiment, a recess receiving portion 38 that matches the box mounting portion recess 26 of the box mounting portion 24 is formed on one side surface (37b) of the arm member storage portion 37, and a box mounting portion recess 26 is formed on one side surface (24b) of the box mounting portion 24, but it is also possible to form recess receiving portions 38 on both side surfaces of the arm member storage portion 37, form box mounting portion recesses 26 on both sides of the box mounting portion 24, and fix the box mounting portion 24 to the arm member storage portion 37 with caps 40 from both sides.

[0066] For example, in the second embodiment described above, the two protrusions 43 are formed at positions that are substantially opposed to each other, but they may be formed at other positions as long as they can be engaged with the recesses 39b.

[0067] For example, in the second embodiment, the protrusions 43 are formed at two locations, but they may be formed at three or more locations. [Explanation of symbols]

[0068] 10 Lid 20 Arm components 24 Box mounting part 25 Box mounting protrusion 26 Box mounting recess 30 Box 31 Box body 34 Arm member guide part 35 Convex receiving part 37 Arm component storage section 38 Recessed receiving part 39 Uneven part 39a Convex 39b Recess 40 Cap 41 Torso 42 Flange 43 Protrusion 44 Engagement protrusion 45 Penetration 46 Insertion section 47 Engagement recess 48 Step

Claims

1. A lid for covering a fuel filler port, charging port or filling port of a vehicle body has an arm member formed with a box mounting portion, and a box having a box main body portion with an opening and an arm member storage portion for storing the arm member is attached to the fuel filler port, charging port or filling port of the vehicle body, and the lid is attached to the arm member storage portion so that the lid can be opened and closed with the box mounting portion as a rotation center, A cylindrical box mounting recess is formed on at least one side surface of the box mounting portion, A recess receiving portion is formed on a side surface of the arm member storage portion at a position that matches the recess of the box mounting portion, the recess receiving portion being protruded in a cylindrical shape having a circular cross section and having a zigzag-shaped uneven portion formed on the entire circumference of the tip portion, A lid mounting structure characterized in that the lid is attached to the arm member storage section in an openable and closable manner by fitting a cap having a body portion that penetrates the recess receiving portion and can be inserted into the recess of the box mounting section to engage with it, and a flange portion formed at the tip portion of the body portion and having a protrusion that can engage with the uneven portion of the recess receiving portion.

2. 2. The lid mounting structure according to claim 1, wherein the recesses and protrusions of the uneven portion of the recess receiving portion have the same shape when the recess receiving portion is viewed from the side, and are formed alternately and continuously.

3. The lid mounting structure according to claim 2 , wherein the projection of the cap has a shape similar to that of the recess of the uneven portion of the recess receiving portion when the cap is viewed from the side.

4. 4. The lid mounting structure according to claim 1, wherein the protrusions of the cap are formed in a plurality of positions slightly shifted from point symmetric positions in the circumferential direction.

5. A lid mounting structure as described in any one of claims 1 to 4, wherein a circumferential groove is formed on the inner surface of the recess receiving portion of the arm member storage portion, and an engaging protrusion is formed on the outer surface of the body portion of the cap at a position that matches the groove of the recess receiving portion when the uneven portion and the protrusion engage, and the groove and the engaging protrusion engage with each other.

6. A lid mounting structure as described in any one of claims 1 to 5, wherein the body of the cap is coaxially formed with a through portion that penetrates the recess receiving portion of the arm member storage portion and an insertion portion having a diameter smaller than that of the through portion that is inserted into the recess of the box mounting portion.

7. The lid mounting structure according to any one of claims 1 to 6, wherein the cap and the box mounting portion are formed of different materials.

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