JP6201691B2 - Seal structure for floor panel - Google Patents

Description

  The present invention relates to a floor panel sealing structure for sealing a gap between a cover and a floor panel covering an upper portion of an opening formed in a floor panel constituting a floor surface.

  A high voltage battery (hereinafter may be abbreviated as “battery”) mounted on a vehicle such as an electric vehicle or a hybrid car is laid out on the vehicle floor. Batteries tend to increase in size to ensure the cruising distance of the vehicle. Therefore, especially when a battery is laid out on the rear floor panel constituting the floor surface at the rear of the vehicle, the large battery occupies the luggage space at the rear of the vehicle, and the usability of the luggage space is deteriorated. In order to secure the cargo space, it is necessary to mount a battery under the luggage board, but a large battery cannot fit in the space under the luggage board.

  In order to solve such a problem that the cargo space is insufficient, there is a conventional technique in which a battery is fixed to the lower surface of the rear floor panel and the battery is completely laid out of the passenger compartment (for example, Patent Document 1). However, since the battery is usually provided with a breaker box with a built-in breaker, it is preferable to expose at least the upper half of the battery in the vehicle compartment so that the breaker box can be turned on / off.

  Therefore, there is a conventional technique in which an opening is formed in the rear floor panel, and a battery is assembled in the opening so as to extend over the rear floor panel (for example, Patent Document 2).

JP 7-242125 A JP-A-6-344950

  However, in the case of the conventional technique such as Patent Document 2, it is necessary to seal the gap between the opening of the rear floor panel and the battery to prevent water from entering the vehicle interior. The upper part of the battery exposed in the vehicle compartment is usually covered with a resin cover, and this cover is fixed to the rear floor panel. Therefore, in practice, it is necessary to seal the gap between the cover and the rear floor panel.

  Conventional seal structures for vehicle floor panels include O-rings and weather strips. However, since such a seal structure has a single structure, there are cases where it is impossible to cope with the case where the waterproofing is broken, and the size tends to be increased.

  Patent Document 2 uses a Z-type double seal structure to improve waterproofness. However, in the Z-type double seal structure of Patent Document 2, it is necessary to provide two horizontal seal surfaces and further to make a difference in height between these seal surfaces. Therefore, the problem of increasing the size of the seal structure has not been solved.

  In addition, when an expensive seal material is used, a cost increase is accompanied by an increase in the size of the seal structure.

  In view of the above problems, the present invention provides a floor panel sealing structure that seals the gap between the cover and the floor panel covering the upper part of the opening of the floor panel, and that is compact, yet waterproof and avoids cost increases. It is intended to provide.

  In order to solve the above-mentioned problems, a typical configuration of the present invention is a resin cover that covers a top portion of an opening of a floor panel in a floor panel sealing structure including a floor panel that forms a floor surface and has an opening. A cover having a first flange fixed to the upper surface of the floor panel by bending outward from the side wall along the edge of the opening of the floor panel and a second flange extending downward from the edge of the opening of the floor panel A first sealing material that is attached to the lower surface of the first flange and pressed against the edge of the opening, and is attached to the lower surface of the first flange adjacent to the outside of the first sealing material, and the first flange and the floor panel A second sealing material that seals the gap, and the first sealing material is thicker in the vertical direction and less elastic than the second sealing material, and is compressed to be compressed with the first flange and the first sealing material. Characterized by sealing the gap between the flanges.

  According to said structure, since the 1st sealing material has the thickness of an up-down direction, it protrudes below rather than the 2nd sealing material. Thus, the first and second sealing materials have a compact L shape corresponding to the second flange having an L-shaped cross section.

  The first sealing material having low elasticity is easily compressed with low stress when pressed against the edge of the opening. In addition, the first sealing material spreads to the opening side of the second flange parallel to the cover assembly direction, helping to protrude downward from the second sealing material. As a result, the first sealing material is generated between the first flange orthogonal to the assembly direction and the second flange located below the first flange and not parallel to the first flange (parallel to the assembly direction). A wide range of gaps can be suitably sealed.

  On the other hand, the second sealing material reaches the floor panel by the compression of the first sealing material. Then, a narrow gap between the first flange and the floor panel parallel to each other (horizontal) is sealed. Since the second sealing material is not compressed unless the stress is high, the positional relationship between the cover and the floor panel is stably maintained.

  As described above, according to the present invention, the gap between the cover and the floor panel covering the upper part of the opening formed in the floor panel constituting the floor surface is doubled by the two types of sealing materials, the first and second sealing materials. Is sealed. This prevents water from entering the upper side of the floor panel, that is, the vehicle interior, with higher waterproofness.

  The seal structure according to the present invention is a compact structure in which two types of seal materials having a difference in thickness are simply attached adjacent to the lower surface of the cover. Therefore, the seal structure according to the present invention is much smaller than the seal structure using a weather strip or the like. In addition, since the first seal material is compressed simultaneously with the assembly of the cover, the seal structure is easily completed, and no troublesome assembly work is required.

  In addition, the first sealing material, which is responsible for most of the waterproofing, has a larger volume than the second sealing material, but is inexpensive and therefore does not cause an increase in cost. The second sealing material is expensive, but the volume is small because the narrow gap is sealed, and the cost is not increased. Basically, it can be sufficiently waterproofed with only the first sealing material, but in the unlikely event that an expensive second sealing material is used in the vicinity of the contact portion between the first flange and the second flange. , Cost up.

  The floor panel sealing structure further includes a rib protruding downward from the first flange of the cover to the inside of the opening, and the first sealing material is wound around the rib over the opening inner side, the lower side, and the floor panel side of the rib. It is good to have.

  Since the 1st sealing material is affixed on the lower surface of the 1st flange, it is stably fixed to the fixed position from the first. However, as described above, the first sealing material is further wound around the ribs, so that the peeling of the first sealing material that is pressed against the edge of the opening when the cover is assembled is more prevented.

  The first flange of the cover includes an outer flange positioned on the outer side and an inner flange positioned on the inner side having a height higher than the outer flange, and the second sealing material includes an outer flange and an inner flange. It is good to arrange | position on the lower surface of an inner flange along the level | step difference of a boundary. This is because such a configuration can prevent displacement of the second sealing material disposed at the corner of the step.

  ADVANTAGE OF THE INVENTION According to this invention, the sealing structure for floor panels which seals the clearance gap between the cover and floor panel which cover the upper part of the opening of a floor panel can be provided although it is compact and can prevent a cost rise.

It is a perspective view which shows the vehicle rear part with which embodiment of the sealing structure for floor panels by this invention is applied. It is a perspective view which shows the vehicle rear part which removed the luggage board of FIG. FIG. 3 is a perspective view of the hybrid battery unit of FIG. It is the perspective view which looked at the rear floor panel of FIG. 3 from the downward direction. It is a figure which shows the state which assembled | attached the hybrid battery of FIG. 4 to the rear floor panel. It is a figure which shows a mode that a hybrid battery is covered on the upper part of opening of the rear floor panel of FIG. 5, and a resin-made upper cover is covered. FIG. 7 is a perspective view of the upper cover of FIG. 6. It is the perspective view which looked at the upper cover of Drawing 7 from the lower part. It is the perspective view which looked at the upper cover of Drawing 7 from the lower part. It is AA sectional drawing of FIG. FIG. 11 is a partially enlarged view of FIG. 10. It is BB sectional drawing of FIG. FIG. 13 is a partially enlarged view of FIG. 12. It is a figure which illustrates the seal structure in a comparative example.

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. The dimensions, materials, and other specific numerical values shown in the embodiments are merely examples for facilitating understanding of the invention, and do not limit the present invention unless otherwise specified. In the present specification and drawings, elements having substantially the same function and configuration are denoted by the same reference numerals, and redundant description is omitted, and elements not directly related to the present invention are not illustrated. To do.

  FIG. 1 is a perspective view showing a vehicle rear portion to which an embodiment of a floor panel seal structure according to the present invention is applied. In the figure, the front side of the vehicle is indicated by arrow Fwd, the right side of the vehicle is indicated by arrow Rh, and the upper side of the vehicle is indicated by arrow Up. As shown in FIG. 1, a luggage board 104 having a flat upper surface is provided on the rear side of the rear seat 102 at the rear of the vehicle 100.

  FIG. 2 is a perspective view showing a state where the luggage board 104 of FIG. 1 is removed. As shown in FIG. 2, a hybrid battery unit 106 and an auxiliary battery unit 108 are provided below the luggage board 104. The automobile 100 according to the present embodiment is a hybrid car, but may be an electric car or a gasoline engine car.

  FIG. 3 is a perspective view of the battery unit 106 of FIG. 2 as viewed obliquely from the left front of the vehicle. In FIG. 3, the rear seat 102 is omitted for convenience of illustration. As shown in FIG. 3, the battery unit 106 is attached to a rear floor panel 110 in which an opening 116 (see FIG. 4) that constitutes a vehicle floor surface is formed.

  The battery unit 106 includes a high-voltage hybrid battery 112 (see FIG. 4) constituted by a lithium ion secondary battery or the like, and a resin upper cover 114 covering the upper part thereof. Upper cover 114 prevents the occupant from contacting battery 112 when the breaker box (not shown) is operated. From the viewpoint of avoiding an increase in vehicle weight, the upper cover 114 is preferably made of hard resin.

  4 is a perspective view of the rear floor panel 110 of FIG. 3 as viewed from below. As shown in FIG. 4, the rear floor panel 110 has an opening 116 behind the position where the rear seat 102 (see FIG. 2) is installed. When the battery unit 106 is assembled to the rear floor panel 110, first, as shown in FIG. 4, the battery 112 is fixed to the rear floor panel 110 through the opening 116 so as to straddle the top and bottom of the rear floor panel 110. FIG. 5 is a diagram showing a state where the battery 112 of FIG. 4 is assembled to the rear floor panel 110.

  FIG. 6 is a diagram illustrating a state in which the battery 112 is covered on the upper part of the opening 116 of the rear floor panel 110 of FIG. 5 and the resin upper cover 114 is covered. As described above, the upper cover 114 is placed on the upper portion of the opening 116 so as to cover the battery 112, whereby the assembly of the battery unit 106 to the rear floor panel 110 is completed, and the state shown in FIG. 3 is obtained.

  That is, by installing the battery unit 106 over both the interior and exterior areas of the vehicle interior, it is possible to secure the luggage storage space and the rear view on the luggage board 104 of FIG. Further, even if battery cells (not shown) included in the battery 112 are arranged one above the other, the minimum ground clearance can be secured. Unlike the case where the battery is completely laid out outside the vehicle compartment, there is no need to arrange the battery cells in a flat area over the wide area in the horizontal direction at the bottom of the rear floor panel 110, so there is no problem of interference with the suspension and fuel tank. .

  In the present embodiment, the rear floor panel 110 is described as an example of the floor panel constituting the vehicle floor surface. However, the present invention is not limited thereto, and the battery unit 106 is similarly installed by forming an opening in the front floor panel. May be.

  FIG. 7 is a perspective view of the upper cover 114 of FIG. The upper cover 114 has a side wall 118 along the edge of the opening 116 of the rear floor panel 110 and a first flange 120 that is bent outward from the side wall 118 and fixed to the upper surface of the rear floor panel 110.

  FIGS. 8 and 9 are perspective views of the upper cover 114 of FIG. 7 as viewed from different directions below. 8 and 9, the top surface of the upper cover 114 is removed. A first foamable sealing material 122 is continuously attached to the lower surface of the first flange 120 of the upper cover 114 over the entire circumference. On the lower surface of the first flange 120, a second foamable sealing material 124 is further attached around the circumference adjacent to the outside of the first foamable sealing material 122. Note that the meaning that the second foamable sealing material 124 is “adjacent” to the first foamable sealing material 122 does not require that the first foamable sealing material 122 is in contact with the first foamable sealing material 122 without a gap. As shown in FIG. 8 and FIG. 9, it is also included that the sealing materials 122 and 124 are arranged with a slight gap therebetween.

  FIG. 10 is a cross-sectional view taken along the line AA of FIG. 3, and is an overall view of the vehicle floor panel seal structure according to the present embodiment. FIG. 11 is a partially enlarged view of FIG. 10, and FIGS. 11A and 11B are enlarged views of the region Z and the region Y of FIG. FIG. 12 is a cross-sectional view taken along the line BB of FIG. 3 and is an overall view of the vehicle floor panel seal structure according to the present embodiment. 13 is a partially enlarged view of FIG. 12, and FIGS. 13A and 13B are enlarged views of the region X and the region W of FIG. 12, respectively. 10 and 12, the internal structure of the battery 112 is not shown for convenience.

  As shown in FIGS. 11A and 11B and FIGS. 13A and 13B, the second flange 126 extends downward from the edge of the opening 116 of the rear floor panel 110. The first foamable sealing material 122 has a larger thickness in the vertical direction and lower elasticity than the second foamable sealing material 124. The first foamable sealing material 122 is continuous foaming.

  As shown in FIG. 6, when the battery 112 is covered on the upper part of the opening 116 of the rear floor panel 110 and the upper cover 114 made of resin is put on, the state shown in FIGS. As shown, the first foamable sealing material 122 is pressed against the edge of the opening 116 (the base of the second flange 126). As a result, the first foamable sealing material 122 is compressed to seal the gap between the first flange 120 and the second flange 126. On the other hand, the second foaming sealing material 124 is an independent foaming sealing material that seals the gap between the first flange 120 and the rear floor panel 110.

  The first and second foamable sealing materials 122 and 124 may both be made of synthetic rubber, and typically EPDM (Ethylene Propylene Diene Monomer) rubber may be used. In this embodiment, such a foaming sealing material is used as a suitable sealing material, but it is not essential that the sealing material is foamable.

  11A, 11B, and 13A, 13B, for convenience of illustration, the rectangular first foamable sealing material 122 and second foamable sealing material 124 before being compressed are shown as they are. Yes. Accordingly, the first foamable sealing material 122 and the second foamable sealing material 124 that deviate below the rear floor panel 110 in these drawings are actually compressed by the rear floor panel 110 and below the rear floor panel 110. There is no departure.

  According to said structure, since the 1st foamable sealing material 122 is thick in the up-down direction, it protrudes below rather than the 2nd foamable sealing material 124. FIG. Thus, the first and second foamable sealing materials 122 and 124 have a compact L-shape corresponding to the second flange 126 having an L-shaped cross section.

  When the first foamable sealing material 122 having low elasticity is pressed against the edge of the opening 116 (the base of the second flange 126), it is easily compressed with low stress. Further, the first foamable sealing material 122 also projects downward from the second foamable sealing material 124, and therefore, the first foamable sealing material 122 is parallel to the assembly direction of the upper cover 114 (the vertical direction in FIGS. 11 and 13). The two flanges 126 spread toward the opening 116 side. As a result, the first foamable sealing material 122 is positioned below the first flange 120 perpendicular to the assembly direction of the upper cover 114 and not parallel to the first flange 120 (the assembly of the upper cover 114). A wide gap formed between the second flange 126 (parallel to the attaching direction) can be preferably sealed.

  On the other hand, the second foamable sealing material 124 reaches the rear floor panel 110 by the compression of the first foamable sealing material 122, as shown in FIGS. 11 (a) (b) and 13 (a) (b). Then, a narrow gap between the first flange 120 and the rear floor panel 110 that are parallel (horizontal) to each other is sealed. Since the second foamable sealing material 124 is not compressed unless the stress is high, the positional relationship between the upper cover 114 and the rear floor panel 110 is stably maintained.

  As described above, according to the present embodiment, the gap between the upper cover 114 and the rear floor panel 110 that covers the upper part of the opening 116 so as to cover the battery 112 installed across the upper and lower sides of the rear floor panel 110 that constitutes the vehicle floor surface is provided. In addition, the first and second foaming sealing materials 122 and 124 are double-sealed. This prevents water from entering the upper side of the rear floor panel 110, that is, the vehicle interior, with higher waterproofness.

  In the present embodiment, as the first foamable sealing material 122, a material having a lower waterproof property than the second foamable sealing material 124 is used. However, although the first foamable sealing material 122 is said to have low waterproofness, it is a performance compared to the second foamable sealing material 124 to the last, and is not poor in waterproofness, and the performance as a foamable sealing material is Have enough. On the contrary, most of the waterproofing at the opening 116 of the rear floor panel 110 is performed by the first foamable sealing material 122.

  FIG. 14 is a diagram illustrating a seal structure in a comparative example compared with the present embodiment. In FIG. 14, the same reference numerals are given to the same elements as those in the present embodiment. FIGS. 14A and 14B are cross-sectional views corresponding to FIG. FIG. 14A shows a seal structure that seals the gap between the upper cover 114 and the rear floor panel 110 using a weather strip 130. FIG. 14B shows a seal structure using a Z-type seal 131 similar to that of Patent Document 2.

  14A and 14B, in each of the comparative examples, a raised portion 132 in which the upper cover 114 is greatly raised near the rear floor panel 110 is formed, and a weather strip 130 or a Z-shaped seal 131 is interposed thereunder. It is forced to have a large configuration.

  On the other hand, as shown in FIG. 11A, the seal structure according to the present embodiment is affixed by adhering two types of foaming sealing materials 122 and 124 with different thicknesses adjacent to the lower surface of the upper cover 114 of the battery 112. It is a compact structure just attached. Therefore, the seal structure according to the present embodiment is significantly reduced in size as compared with the seal structure using the weather strip of the comparative example of FIG. Moreover, since the first foamable sealing material 122 is compressed simultaneously with the assembly of the upper cover 114, the sealing structure is easily completed, and no troublesome assembly work is required.

  In addition, the first foamable sealing material 122, which is responsible for most of the waterproofing, has a larger volume than the second foamable sealing material 124, but is inexpensive and therefore does not cause an increase in cost. The second foamable sealing material 124 is expensive, but the volume is small because the narrow gap is sealed, and the cost is not increased. Basically, the first foamable sealing material 122, which has a large volume but is inexpensive, can be sufficiently waterproofed. However, in the unlikely event, an expensive but compact second sealing material is used only in the vicinity of the contact portion between the first flange 120 and the second flange 126. As a result, an increase in cost is suppressed in this embodiment.

  For example, as shown in FIG. 11A, the seal structure in the present embodiment further includes a rib 140 that protrudes downward from the first flange 120 of the upper cover 114 into the opening 116. The first foamable sealing material 122 is wound around the rib 140 over the inner side of the opening 106 of the rib 140, the lower side, and the rear floor panel 110 side.

  Since the first foamable sealing material 122 is affixed to the lower surface of the first flange 120, the first foamable sealing material 122 is stably fixed in place. However, as described above, the first foamable seal material 122 is further wound around the ribs 140 to be pressed against the edge of the opening 116 (the base of the second flange 126) when the upper cover 114 is assembled. Peeling of the material 122 is more fully prevented.

  In the present embodiment, the side wall 118 of the upper cover 114 is positioned inside the opening 116 of the rear floor panel 110, and the rib 140 protrudes vertically downward from the boundary of the first flange 120 with the side wall 118. That is, the rib 140 is almost located on the extension of the side wall 118. However, although not shown, the side wall 118 of the upper cover 114 may be positioned outside the opening 116 of the rear floor panel 110, and in that case, the rib 140 is inclined closer to the opening 116 than vertically below and into the opening 116. It is good also as protruding.

  For example, as shown in FIG. 11A, the first flange 120 of the upper cover 114 includes an outer flange 120A positioned on the outer side, and an inner flange 120B positioned on the inner side having a height higher than the outer flange 120A. including. The outer flange 120A is fixed to the rear floor panel 110 by stud bolts 142 or 144. Element 145 is a harness.

  The second foamable sealing material 124 is disposed on the lower surface of the inner flange 120B along the step 146 at the boundary between the outer flange 120A and the inner flange 120B. This is because the second foamable sealing material 124 disposed at the corner of the step 146 can be prevented from being displaced according to such a configuration.

  As mentioned above, although preferred embodiment of this invention was described referring an accompanying drawing, it cannot be overemphasized that this invention is not limited to the example which concerns. It will be apparent to those skilled in the art that various changes and modifications can be made within the scope of the claims, and these are naturally within the technical scope of the present invention. Understood.

  In the present description, the present invention has been described using a vehicle floor panel seal structure as an embodiment. However, the present invention is not limited to a vehicle, and is used for a floor panel sealing structure for sealing a gap between a cover and a floor panel covering an upper portion of an opening formed in a floor panel constituting any floor surface. Good.

  INDUSTRIAL APPLICABILITY The present invention can be used for a floor panel sealing structure that seals a gap between a cover that covers an upper portion of an opening formed in a floor panel constituting a floor surface and the floor panel.

DESCRIPTION OF SYMBOLS 100 ... Vehicle, 102 ... Rear seat, 104 ... Luggage board, 106 ... Hybrid battery unit, 108 ... Auxiliary battery unit, 110 ... Rear floor panel, 112 ... Hybrid battery, 114 ... Upper cover, 116 ... Opening, 118 ... Side wall, 120 ... 1st flange, 120A ... Outer flange, 120B ... Inner flange, 122 ... 1st foamable sealing material, 124 ... 2nd foamable sealing material, 126 ... 2nd flange, 130 ... Weather strip, 131 ... Z-type seal, 140 ... ribs, 142, 144 ... stud bolts, 145 ... harnesses, 146 ... steps

Claims (3)

In a floor panel sealing structure comprising a floor panel comprising a floor and having openings formed therein,
A resin cover covering an upper portion of the opening of the floor panel, comprising a side wall along an edge of the opening of the floor panel and a first flange bent outward from the side wall and fixed to the upper surface of the floor panel. A cover,
A second flange extending downward from an edge of the opening of the floor panel;
A first sealing material that is attached to the lower surface of the first flange and pressed against the edge of the opening;
A second sealing material that is attached to the lower surface of the first flange adjacent to the outside of the first sealing material and seals the gap between the first flange and the floor panel;
The first sealing material has a larger vertical thickness and lower elasticity than the second sealing material, and is compressed to seal the gap between the first flange and the second flange. . The floor panel seal structure further includes a rib projecting downward from the first flange of the cover to the inside of the opening,
2. The floor panel sealing structure according to claim 1, wherein the first sealing material is wound around the rib over the opening inner side, the lower side, and the floor panel side of the rib. The first flange of the cover is
An outer flange located on the outside;
An inner flange having a height higher than the outer flange and positioned inside,
3. The floor panel seal structure according to claim 1, wherein the second seal member is disposed on a lower surface of the inner flange along a step at a boundary between the outer flange and the inner flange.

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