JP5115399B2 - Inspection hole cover structure for vehicles - Google Patents

Description

  The present invention belongs to the technical field of a vehicle inspection hole lid structure for closing an inspection hole formed in a floor panel.

In Patent Document 1, an annular portion having a U-shaped cross section that opens downward is formed in a lid member that closes the inspection hole, and the lid member is bolted to the floor panel with the seal member fitted into the annular portion. Thus, a technique for facilitating positioning of the seal member when the lid member is attached is disclosed.
Japanese Patent Laid-Open No. 9-254829

  However, in the above prior art, the annular portion has two side surfaces that rise in the substantially vertical direction along the inner and outer circumferences of the seal member, so that when a downward external force acts on the center of the lid member, When the corner part which is a part expands and deform | transforms, the cover member deform | transformed greatly below the inspection hole, and there existed a problem that it was inferior to rigidity.

  The present invention has been made paying attention to the above problems, and an object of the present invention is to provide a vehicle inspection hole lid structure capable of increasing the rigidity of the lid member.

  In order to achieve the above object, in the present invention, the radially outer side surface of the annular portion located radially inside the fastening position between the lid member and the floor panel is radially outward from the top of the annular portion to the outer periphery of the lid member. A fastening portion that is in contact with the back surface of the linear shape portion was formed on the floor panel, and the contact position between the linear shape portion and the fastening portion was fastened.

  In the present invention, since the radially outer side surface of the annular portion is a linear portion and the rising portion of the radially outer side surface is eliminated, the amount of deformation of the lid member in the radial direction can be kept small and the rigidity can be increased.

  Hereinafter, the best mode for carrying out the inspection hole cover structure for a vehicle of the present invention will be described based on the embodiments shown in the drawings.

First, the configuration of the first embodiment will be described.
FIG. 1 is a perspective view showing a vehicle inspection hole lid structure of Example 1, FIG. 2 is a perspective view showing the shape of a floor panel around the inspection hole (inspection hole) of Example 1, and FIG. FIG. 2 is a cross-sectional view taken along line S1-S1 in FIG. 1, and the vehicle inspection hole lid structure according to the first embodiment is applied to an inspection hole of a cab-over type vehicle such as a one box car, for example.

  As shown in FIGS. 1 to 3, the vehicle inspection hole lid structure of the first embodiment includes a floor panel 1, an inspection hole 2, a hole cover (lid member) 3, a seal (seal member) 4, and a bolt. 5 is the main component.

  The inspection hole 2 is a work opening opened in the floor panel 1 for maintenance and inspection of a fuel tank and the like (not shown) arranged below the floor panel 1 from the floor side, and is also referred to as a service hole. The inspection hole 2 has an opening edge 2 a having a circular shape in a plan view on the back surface 1 a side of the floor panel 1 and subjected to burring. A flat seat surface portion 1 c is formed on the surface 1 b side of the floor panel 1 and on the periphery of the inspection hole 2.

  The hole cover 3 is a metal lid that closes the inspection hole 2. The hole cover 3 includes a central lid portion 6 that covers the inspection hole 2, an annular portion 7 that is located on the radially outer side of the central lid portion 6, and a peripheral edge portion 8 that is located on the radially outer side of the annular portion 7. Have.

  The center lid portion 6 is formed in a circular shape slightly larger than the opening edge 2 a of the inspection hole 2, and the back surface 6 a of the center lid portion 6 is in surface contact with the seat surface portion 1 c of the floor panel 1. The central lid portion 6 is formed with a substantially trilobal embossed portion 6c extending from the center in the direction of three bolt fastening positions A and projecting toward the surface 6b side of the central lid portion 6. The embossed portion 6 c is for increasing the rigidity of the hole cover 3.

  When attaching the hole cover 3 to the floor panel 1, the annular portion 7 facilitates the positioning of the seal 4 by previously fitting the seal 4 on the back surface 7 a side of the annular portion 7, and after the attachment, This is to suppress the positional deviation of 4. The seal 4 is for sealing between the seat surface portion 1c of the floor panel 1 and the back surface 6a of the hole cover 3, and is formed in a circular shape in a plan view using an elastic material such as rubber.

  The annular portion 7 has a top portion 9, a radially inner side surface 10, and a radially outer side surface 11, and protrudes upward, that is, a cross section opened to the seat surface portion 1c side of the floor panel 1 where the surface 7b side of the annular portion 7 is convex. It is formed in a U shape. The top portion 9 is located above the seal 4 and is in contact with the surface 4 a of the seal 4. The radially inner side surface 10 rises from the central lid portion 6 in a substantially vertical direction, and is connected integrally with the top portion 9. The radially inner side surface 10 is in contact with the inner peripheral surface 4 b of the seal 4. The radially outer side surface 11 rises from the peripheral edge 8 of the hole cover 3 in a substantially vertical direction and is connected integrally with the top 9. The radially outer side surface 11 is in contact with the outer peripheral surface 4 c of the seal 4.

  In the hole cover 3, a portion located on the radially inner side a of the bolt fastening position A that is a place for fixing the hole cover 3 to the floor panel 1 extends integrally from the top portion 9 to the outer peripheral edge 8 c of the hole cover 3. The linear shape part 13 which inclines below toward the direction outer side b is formed. A bolt hole 13 c into which the bolt 5 is inserted is formed at the bolt fastening position A of the linear portion 13. The linear shape portion 13 forms a left side surface 13d and a right side surface 13e having a substantially right side triangular shape, the height of which decreases toward the outer peripheral edge 8c on both sides in the circumferential direction. 3 (S2-S2 cross section), the lower part is formed in a U-shaped cross section (see FIG. 4).

Corresponding to the linear shape portion 13 extending to the outer peripheral edge 8 c of the hole cover 3, the seat surface portion 1 c of the floor panel 1 below the back surface 13 a of the linear shape portion 13 abuts on the back surface 13 a of the linear shape portion 13. Thus, a bolt fastening portion 14 protruding from the seat surface portion 1c is formed. The bolt fastening portion 14 is formed so as to rise from the seating surface portion 1c of the floor panel 1 and connect to the bolt fastening surface 14a integrally with the bolt fastening surface 14a having a predetermined width with respect to the circumferential direction c of the inspection hole 2. A radially inner side surface 14b formed on the radially inner side a; a left side surface 14c formed on both sides of a circumferential direction c having a substantially right-angled triangular shape along the left side surface 13d and the right side surface 13e of the linear portion 13; 14d (refer FIG. 4).
The bolt fastening surface 14 a is in contact with the back surface 13 a of the linear shape portion 13 and welds a welding nut that forms a female screw portion 14 e to be screwed with the bolt 5 at a position corresponding to the bolt hole 13 c of the hole cover 3 ( (See FIGS. 3 and 4).

  As shown in FIG. 4, when the hole cover 3 is attached to the floor panel 1, the linear shape portion 13 is set to fit into the bolt fastening portion 14. At the bolt fastening position A, the straight shape portion 13 forms a surface that is linearly inclined from the top portion 9 of the annular portion 7 of the hole cover 3 toward the outer peripheral edge 8c of the lower hole cover 3, and the bolt is formed on the inclined surface. The bottom surface of the bolt head 5a is closely attached (see FIG. 4). Similar to the linear portion 13, a surface that is linearly inclined from the upper end of the radially inner side surface 14 b is formed.

The upper surface of the bolt fastening surface 14 a of the inspection hole 2 is in close contact with the back surface 13 a of the linear portion 13 of the hole cover 3. Then, the bolt 5 fastens the linear shape portion 13 and the bolt fastening surface 14 a perpendicular to the inclined surface of the linear shape portion 13 and the bolt fastening surface 14 a, and attaches the hole cover 3 to the floor panel 1.
The peripheral portion 8 constitutes the outer periphery of the hole cover 3 at a portion excluding the linear shape portion 13, and the back surface 8 a is in surface contact with the seat surface portion 1 c of the floor panel 1.

Next, the operation will be described.
In the conventional inspection hole lid structure, as shown in FIG. 5, two sides (broken lines) of a top part covering the upper surface of the seal and an inner side surface and an outer side surface rising in a substantially perpendicular direction along the inner and outer circumferences of the seal, Consists of. When a downward external force acts on the center of the hole cover, such as when the occupant steps on the center portion of the hole cover, the hole cover 3 is placed radially inward between the input point of the external force and the bolt fastening position. A pulling force is generated. At this time, there is a problem that the rigidity of the hole cover is inferior because the hole cover is greatly deformed below the inspection hole by the corner portions constituting the rising portions on both side surfaces of the annular portion extending and deforming in the radial direction.

  On the other hand, in the inspection hole lid structure of the first embodiment, the floor panel 1 of the hole cover 3 and the radially outer side surface 11 of the annular portion 7 located on the radially inner side a of the bolt fastening position A are 9 is formed in a linear shape portion 13 extending radially outward from the outer peripheral edge 8c of the hole cover 3, and a bolt fastening portion 14 is formed on the floor panel 1 to contact the back surface 13a of the linear shape portion 13. The abutting position with the bolt fastening portion 14 was bolted.

  That is, since the corner portion that becomes the allowance in the radial direction is only the corner portion between the radially inner side surface 10 and the central lid portion 6, as shown in FIG. 6, when a downward external force acts on the hole cover 3. The elongation allowance is small, and deformation can be suppressed. For this reason, in Example 1, the displacement amount of the radial direction with respect to the load applied to the hole cover 3 can be reduced and the rigidity can be increased as compared with the conventional inspection hole lid structure (FIG. 7).

In addition, since the shape of the part except the linear shape part 13 of the radial direction inner side surface 10 and the radial direction outer side surface 11 of the cyclic | annular part 7 is a shape closely_contact | adhered with the seal | sticker 4 like the past, the floor panel 1 and the hole cover 3 The sealing performance between the two is ensured.
That is, in Example 1, it is possible to achieve both improvement in rigidity of the hole cover 3 and securing of sealing performance.

  Further, in Example 1, the hole cover is formed by fitting the convex shape on the floor panel 1 side (bolt fastening portion 14) and the convex shape on the hole cover 3 side (linear shape portion 13, both side surface portions 13d and 13e). 3 can be positioned. That is, since the hole cover 3 and the floor panel 1 are fitted together, the hole cover 3 can be positioned accurately and easily when the hole cover 3 is attached to the floor panel 1.

Next, the effect will be described.
The vehicle inspection hole lid structure according to the first embodiment has the following effects.

  (1) A linear shape in which the radially outer side surface 11 of the annular portion 7 located on the radially inner side a of the bolt fastening position A extends radially outward from the top 9 of the annular portion 7 to the outer peripheral edge 8c of the hole cover 3. The bolt fastening part 14 which contact | abuts with the back surface 13a of the linear shape part 13 was formed in the floor panel 1 as the part 13, and the contact position of the linear shape part 13 and the bolt fastening part 14 was bolted. As a result, the rigidity of the hole cover 3 can be increased, and the hole cover 3 can be formed thinner, so that weight reduction and cost reduction are possible.

  (2) The side surfaces 13d and 13e are formed on both sides of the inspection hole 2 in the circumferential direction c of the linear shape portion 13, and a convex shape that fits the bolt fastening portion 14 is configured from the both side surfaces 13d and 13e and the linear shape portion 13. Thereby, workability | operativity at the time of attaching the hole cover 3 to the floor panel 1 can be improved.

  The second embodiment is an example in which the shape of the straight shape portion of the hole cover and the bolt fastening portion of the floor panel are different from those of the first embodiment.

  FIG. 8 is a perspective view showing a main part of the inspection hole lid structure for a vehicle according to the second embodiment, FIG. 9 is a perspective view showing the shape of the floor panel around the inspection hole (inspection hole) according to the second embodiment, and FIG. It is a longitudinal cross-sectional view which shows the inspection hole cover structure for vehicles.

  The linearly shaped portion 20 of the second embodiment extends horizontally from the top portion 9 of the hole cover 3 toward the outside in the radial direction of the hole cover 3. A bolt hole 20 c into which the bolt 5 is inserted is formed at the bolt fastening position A of the linear portion 20. The straight shape portion 20 is formed on the both sides of the circumferential direction c with a left side surface portion 20d and a right side surface portion 20e having a substantially rectangular shape in side view, and is formed in a U-shaped cross section having an opening at the bottom when viewed in a cross section in the circumferential direction c. ing.

Corresponding to the linear shape portion 20, a bolt fastening portion protruding from the seat surface portion 1 c so as to abut on the back surface 20 a of the linear shape portion 20 is provided on the seat surface portion 1 c of the floor panel 1 below the back surface 20 a of the linear shape portion 20. 21 is formed. The bolt fastening portion 21 is formed so as to stand up from the bolt fastening surface 21a having a predetermined width with respect to the circumferential direction c of the inspection hole 2 and the seat surface portion 1c of the floor panel 1 and to be integrally connected to the bolt fastening surface 21a. A radially inner side surface 21b formed on the radially inner side a, a left side surface 21c formed on both sides of the circumferential direction c having a substantially rectangular shape in side view along the left side surface 21d and the right side surface 21e of the linearly shaped portion 20, And a right side surface 21d (see FIG. 9).
The bolt fastening portion 21 is in contact with the road surface 20a of the linear shape portion 20 and welds a welding nut that forms a male screw portion 21e to be screwed with the bolt 5 at a position corresponding to the bolt hole 20c of the hole cover 3 ( (See FIGS. 9 and 10).

  Here, the linear shape portion 13 and the bolt fastening surface 14a of the first embodiment are inclined downward toward the radially outer side b, whereas the linear shape portion 20 and the bolt fastening surface 21a of the second embodiment are The bolt fastening surface 21a is set to be the same as the floor panel 1 in the horizontal direction with respect to the ground, that is, parallel to the floor panel 1.

In the vehicle inspection hole lid structure of the second embodiment configured as described above, the same effects as the effects (1) and (2) of the first embodiment can be obtained.
Moreover, in Example 2, since the linear shape part 20 and the bolt fastening part 21 were formed in the rectangular shape in the side view, the bolt fastening part 21 is easier than the Example 1 in which the bolt fastening part 14 is formed in the substantially triangular shape in the side view. Can be formed.

(Other examples)
As mentioned above, although the inspection hole cover structure for vehicles of this invention has been demonstrated based on the Example, about a concrete structure, it is not restricted to an Example, The summary of the invention which concerns on each claim of a claim As long as they do not deviate, design changes and additions are permitted.

It is a perspective view which shows the inspection hole cover structure for vehicles of Example 1. FIG. It is a perspective view which shows the shape of the floor panel around the inspection hole of Example 1. FIG. It is S1-S1 sectional drawing of FIG. 1 which abbreviate | omitted the center part. It is S2-S2 sectional drawing of FIG. In the conventional inspection hole cover structure, it is a longitudinal cross-sectional view which shows a state when external force acts on the center of a hole cover. In the vehicle inspection hole lid structure of Example 1, it is a longitudinal cross-sectional view which shows a state when external force acts on the center of a hole cover. It is a characteristic view of the displacement amount with respect to the applied load which shows the rigidity improvement effect | action of Example 1. FIG. It is a principal part perspective view which shows the vehicle inspection hole cover structure of Example 2. FIG. It is a perspective view which shows the shape of the floor panel around the inspection hole (inspection hole) of Example 2. FIG. FIG. 6 is a longitudinal sectional view showing a vehicle inspection hole lid structure according to a second embodiment.

Explanation of symbols

1 Floor panel 1a Back 1b Front 1c Seat 2 Inspection hole (inspection hole)
2a Open edge 3 Hole cover (lid member)
4 Seal (seal member)
4a Surface 4b Inner peripheral surface 4c Outer peripheral surface 5 Bolt 6 Central lid portion 6a Back surface 6b Surface 6c Embossed portion 7 Annular portion 7a Back surface 7b Front surface 8 Peripheral portion 8a Back surface 8c Outer peripheral edge 9 Top portion 10 Radial inner side surface 11 Radial outer side surface 13a Back surface 13c Bolt hole 13d Left side surface 13e Right side surface 13 Linear shape portion 14 Bolt fastening portion 14a Bolt fastening surface 14b Radial inner side surface 14c Left side surface 14d Right side surface 14e Female thread portion

Claims (2)

A lid member that closes the inspection hole formed in the floor panel is formed with an annular portion having a U-shaped cross-section that opens downward and protrudes upward, and the periphery of the inspection hole and the lid member are formed on the back side of the annular portion. A vehicular inspection hole lid structure in which a sealing member that seals between is fitted, and the lid member and the floor panel are fastened radially outward from the annular portion,
The radially outer side surface of the annular portion located radially inward of the fastening position is a linear shape portion extending radially outward from the top of the annular portion to the outer periphery of the lid member,
Forming a fastening portion in contact with the back surface of the linear shape portion on the floor panel;
An inspection hole lid structure for a vehicle, wherein a contact position between the linear shape portion and the fastening portion is fastened. The inspection hole cover structure for a vehicle according to claim 1,
An inspection hole lid structure for a vehicle, wherein side surfaces are formed on both sides in the circumferential direction of the inspection hole of the linear shape portion, and a convex shape that fits the fastening portion is formed from both side surfaces and the linear shape portion.

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