JP2000211382A - Fuel tank baffle structure - Google Patents

Abstract

(57) [Problem] To provide a baffle structure of a fuel tank in which a baffle member separate from a tank body can be easily attached to the tank body. SOLUTION: An inner pillar 10 is provided inside a resin tank body 10.
b having a baffle portion 12b
The baffle member 12 is attached to the resin tank main body 10 by separating the inner column 10b from the resin tank main body 10 with the mounting portion 12a of the baffle member 12 interposed therebetween.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a baffle structure of a fuel tank in which a baffle portion is provided inside a resin tank main body in order to suppress the noise of fuel liquid in the fuel tank.

[0002]

2. Description of the Related Art Conventionally, as a baffle structure of this kind of fuel tank, there is one disclosed in Japanese Patent Application Laid-Open No. 10-6788.

[0003]

In the publication described in this publication, a plurality of pin-shaped inward portions are formed on an upper wall and a bottom wall of a resin tank body integrally formed by a blow molding method. A stay is protruded, and the stay is inserted into a mounting hole of a baffle part formed separately from the tank body, and a clip is attached to a tip of the stay. Alignment between the pin and the mounting hole of the baffle portion, and alignment between the pin and the clip must be performed in the tank body and require precision, which makes the work difficult and poor in workability. There are issues.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and the invention according to claims 1 to 9 has a baffle structure for a fuel tank in which a baffle member separate from the tank body can be easily attached to the tank body. Its purpose is to provide.

[0005]

According to one aspect of the present invention, there is provided a fuel tank baffle structure having a baffle portion provided inside a resin tank body, the resin tank body comprising: The baffle member having the baffle portion is formed separately from the resin tank body, and the baffle member is attached to the resin tank body by sandwiching the inner pillar at the attachment portion of the baffle member. It is characterized by.

The baffle part can be set at any part of the baffle member and can be of any shape. According to a second aspect of the present invention, the baffle part according to the first aspect is configured such that the inner pillar is It is characterized in that it is constituted by two plate portions integrally connected to both ends of a mounting portion for sandwiching the same.

According to a third aspect of the present invention, the distal ends of the two plate portions according to the second aspect are expanded in directions away from each other.

The invention according to claim 4 is the invention according to claim 2 or 3.
A protrusion protruding from a resin tank body is inserted into a space between the two plate portions described in the above.

The invention according to claim 5 is the invention according to claims 2 to 4.
Wherein the two plate portions are displaced when viewed from a direction substantially perpendicular to the plate surface.

The invention according to claim 6 is characterized in that the two plate portions according to claim 5 are arranged so that a part thereof overlaps when viewed from a direction substantially perpendicular to the plate surface.

[0011] The invention according to claim 7 is the invention according to claims 2 to 6.
Wherein a large number of flexible pieces are formed on at least a part of the outer edge of each of the plate portions.

[0012] The invention according to claim 8 is the invention according to claims 1 to 7.
The outer shape of the inner pillar according to any of the non-circular shape,
The attachment portion of the baffle member has a non-circular shape that matches this non-circular shape.

The ninth aspect of the present invention is the first to eighth aspects.
Wherein the baffle member is made of a soft resin, and a metal leaf spring surrounding the mounting portion is mounted around the mounting portion.

[0014]

According to the first aspect of the present invention, since the baffle member can be attached to the inner pillar formed inside the resin tank body only by sandwiching the attachment portion, precise alignment is required. Instead, they can be easily attached and workability can be improved. Further, since the inner pillar is formed inside the resin tank body, the rigidity of the resin tank body can be ensured.

According to the second aspect of the present invention, in addition to the effect of the first aspect, since two plate portions, which are baffle portions, are integrally provided at both ends of the mounting portion. By securing a certain length of the two plate parts, the length from both ends of the mounting part to the tip of the plate part can be lengthened, and the inner pillar passes through the two plate parts carelessly. Thus, the baffle member can be prevented from being removed from the inner pillar.

According to the third aspect of the present invention, in addition to the effect of the second aspect, when performing the assembling work, the inner pillar can be introduced from the expanded end of the baffle portion,
Work can be performed smoothly.

According to the fourth aspect of the present invention, in addition to the effect of the second or third aspect, the protrusion protruding from the resin tank body is inserted into the space between the two plate portions. Accordingly, the baffle member is prevented from rotating with respect to the inner pillar, so that it is possible to prevent the baffle member from floating in the tank body.

According to the fifth aspect of the present invention, in addition to the effect of any of the second to fourth aspects, the two plate portions are displaced from each other, so that the two plate portions are viewed from a direction substantially perpendicular to the plate surface. The occupied area of the plate portion can be increased, the effect of the resistance plate increases, and the movement of the fuel liquid can be effectively suppressed, and the swaying noise can be suppressed.

According to the sixth aspect of the present invention, in addition to the effect of the fifth aspect, since the part of the plate portion is overlapped, the portion where the plate portion is opposed to the portion where the plate portion is not overlapped at all is provided. For this reason, the rigidity of the plate portion can be improved.

According to the seventh aspect of the present invention, in addition to the effects of any of the second to sixth aspects, a large number of flexible pieces are provided on at least a part of each outer edge of each plate. By forming, the baffle member can be easily inserted from the opening of the tank body by deforming the flexible piece portion during the assembling work, and furthermore, the flexible piece portion is effectively bent by freely bending. The rocking noise of the fuel liquid can be suppressed.

Optionally, the frontage dimension of the plate portion including the flexible piece portion can be made larger than the size of the opening portion, so that the area of the plate portion can be increased.

According to the eighth aspect of the invention, in addition to the effect of any one of the first to seventh aspects, the outer shape of the inner pillar is made non-circular, and the mounting portion of the baffle member conforms to this non-circular shape. Since the baffle member is prevented from rotating with respect to the inner pillar by the non-circular shape described above, it is possible to prevent the baffle member from floating in the tank body.

According to the ninth aspect of the present invention, in addition to the effects of the first to eighth aspects, the baffle member is made of a soft resin, so that the baffle member can be freely deformed at the time of assembling work, so that the tank body is formed. Can be easily inserted through the opening. On the other hand, since the metal leaf spring surrounding the mounting portion is mounted around the mounting portion, the mounting strength after assembly can be ensured.

[0024]

Embodiments of the present invention will be described below with reference to the drawings.

FIGS. 1 to 8 are views showing a baffle structure of a fuel tank according to a first embodiment of the present invention.

In the drawing, reference numeral 10 denotes a resin fuel tank main body, which is integrally formed by blow molding.
An opening 10a is formed on the upper surface, and an inner pillar 10b for ensuring fuel tank rigidity is formed inside the opening 10a.

A baffle member 12 is attached to the inner pillar 10b of the fuel tank body 10. That is, the baffle member 12 is mainly made of, for example, a soft resin such as nylon, and has a mounting portion 12a that sandwiches the inner pillar 10b and a baffle portion 12b. It is composed of two plate portions 12c, 12c integrally connected to both ends of the portion 12a.

The two plate portions 12c have a larger area than the mounting portion 12a so as to receive the fuel splash, and extend substantially parallel to each other. However, the front ends of the expanded portions 12d, 1d are expanded in directions away from each other.
2d.

The mounting portion 12a has a square shape that matches the same non-circular square shape as the inner column 10b of the fuel tank body 10, and the mounting portion 12a is prevented from rotating with respect to the inner column 10b. Further, a metal leaf spring 14 made of stainless steel or the like is mounted around the mounting portion 12a to secure the mounting strength of the mounting portion 12a to the inner pillar 10b. Thus, the mounting portion 12a is
And the baffle member 12 is securely mounted in the fuel tank body 10. The tip of the metal leaf spring 14 extends to near the center of the plate portion 12c. In addition, a rubber 16 that is elastically in contact with the inner pillar 10b is attached to the inner peripheral side at the base of the attachment portion 12a.

Further, in the fuel tank main body 10, a projection 10c projecting inward is formed by blow molding. The protrusion 10c is provided between the two plate portions 12c and 12c.
c, and is inserted between the inner pillars 10 of the baffle member 12.
The detents for b are more reliably leveled.

The baffle unit 12 configured as described above
Is assembled into the fuel tank main body 10 by inserting the plate 12c from the opening 10a of the fuel tank main body 10 as shown in FIG. At this time, if the total length of the plate portion 12c is long, the plate portion 12c hits the bottom 10d of the fuel tank body 10, but
Since the plate portion 12c is made of a soft resin, its tip can be slightly bent and can be forcibly inserted (FIG. 7). Next, the plate portion 12 with respect to the inner pillar 10b.
After the posture is adjusted so that c is substantially orthogonal (FIG. 8), the inner column 10b is introduced from the expanded portion 12d of the plate portion 12c, the baffle member 12 is pushed in, and the inner column 10b is inserted into the mounting portion 12a. Is inserted (FIG. 5). At the same time, the protrusion 10c is inserted into the space between the two plate portions 12c. When the inner pillar 10b enters the attachment part 12a to some extent, the inner pillar 10b is automatically inserted into the attachment part 12a by the spring force of the metal leaf spring 14.
It fits.

In this manner, the baffle member 12 can be attached by a very simple operation without requiring precise positioning or the like, and the workability can be improved. The inner pillar 10b is a metal leaf spring 1 located at the mounting portion 12a.
4 and rubber 16 sandwich it from three sides.
The metal plate spring 14 urges the mounting portion 12a in the closing direction, and the two plate portions 12c have a longer overall length. Cannot easily pass through, and the baffle member 12 does not accidentally come off the inner pillar 10b.

As described above, the mounting portion 12a has a non-circular shape that matches the inner pillar 10b, and the projection 10c is inserted between the two plate portions 12c. Since the baffle member 12 is prevented from rotating with respect to the fuel tank main body 10, the inner column 10b
Can be prevented from floating.

The plate portion 12c can have a large area, so that the movement of the fuel liquid can be remarkably suppressed, and the generation of rocking noise can be reduced. However, since the thickness of the plate portion 12c may be small, the capacity of the fuel tank main body 10 does not significantly decrease due to the presence of the baffle member 12.

FIG. 9 is a diagram showing a second embodiment of the present invention. Members similar to those in the first embodiment are denoted by the same reference numerals, and detailed description thereof will be omitted.

The baffle portion 12-1b of the baffle member 12-1 of this embodiment has two plate portions 12-1.
The third embodiment differs from the first embodiment in that c and 12-1c are displaced when viewed from a direction substantially perpendicular to the plate surface.

As described above, the plate portions 12-1c and 12-c
By displacing 1c, the area occupied by the plate as viewed from a direction substantially perpendicular to the plate surface can be substantially increased, the effect of the resistance plate increases, and the movement of the fuel liquid can be effectively suppressed. In addition, the swing noise can be suppressed.

Further, the plate portions 12-1c, 12-1c
Are superimposed portions 12-1e superimposed when viewed from a direction substantially perpendicular to the plate surface, and the presence of the superimposed portions 12-1e makes it possible to superimpose the superposed portions as compared with the case where the superimposed portions are not superposed at all. Since the portions 12-1e face each other, the rigidity of the plate portion 12-1c can be improved with respect to the load on the plate portions 12-1c and 12-1c received from the fuel liquid.

When assembling the baffle member 12-1 into the fuel tank main body 10, when passing the opening 10a of the fuel tank main body 10, the baffle member 12-1 is deformed as shown in FIG. Then, the two plate portions 12-1c, 12-1c are overlaid and inserted, and thus can be easily assembled as in the first embodiment.

FIG. 11 is a diagram showing a third embodiment of the present invention. Members similar to those in the first embodiment are denoted by the same reference numerals, and detailed description thereof will be omitted.

In this embodiment, the baffle member 12-
The second embodiment differs from the previous embodiment in that a number of flexible pieces 12-2e are formed on the outer edge of the plate portion 12-2c of the second baffle portion 12-2b. By forming such a flexible piece portion 12-2e, the outer edge of the plate portion 12-2c is more easily bent. Therefore, the baffle member 12-2 can be easily inserted from the opening 10a of the fuel tank main body 10 by deforming the flexible piece 12-2e during the assembling operation. For this reason, optionally, the width dimension of the plate portion 12-2c including the flexible piece portion 12-2e can be larger than the opening portion 10a, and the area of the plate portion 12-2c can be increased. .

Further, since the flexible piece portion 12-2 flexes freely, the rocking noise of the fuel liquid can be effectively suppressed.

In this embodiment, the baffle unit 1
Apart from 2-2b, a plate 20 serving as a second resin baffle connected to the center of the mounting portion 12a via a metal arm 18 is connected. Thus, a baffle part may be provided at an appropriate position on the baffle member.

[Brief description of the drawings]

FIG. 1 is a side view of a baffle member of a baffle structure of a fuel tank according to a first embodiment of the present invention.

FIG. 2 is a plan view of a fuel tank.

FIG. 3 is a plan view of the baffle member according to the first embodiment.

FIG. 4 is a perspective view of a baffle member according to the first embodiment.

FIG. 5 is a sectional view of the inside of the fuel tank, taken along line 5-5 in FIG. 1;

FIG. 6 is an explanatory diagram illustrating a procedure of an assembling operation according to the first embodiment.

FIG. 7 is an explanatory diagram illustrating a procedure of an assembling operation according to the first embodiment.

FIG. 8 is an explanatory diagram illustrating a procedure of an assembling operation according to the first embodiment.

FIG. 9 is a side view of a baffle member according to a second embodiment.

FIG. 10 is an explanatory perspective view illustrating a procedure of an assembling operation according to the second embodiment.

FIG. 11 is a perspective view of a baffle member according to a third embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Fuel tank main body 10b Inner pillar 10c Projection 12, 12-1, 12-2 Baffle member 12a Attachment part 12b, 12-1b, 12-2b Baffle part 12c, 12-1c, 12-2c Plate part 12d Expansion part 12 -1e Overlapping part 12-2e Flexible piece part 14 Metal leaf spring

Claims (9)

[Claims] 1. A baffle structure of a fuel tank having a baffle portion provided inside a resin tank body, wherein an inner pillar is formed inside the resin tank body, and a baffle member having a baffle portion is connected to the resin tank body. A fuel tank baffle structure, wherein the baffle member is attached to the resin tank body by sandwiching the inner pillar between the attachment portions of the baffle member. 2. The fuel tank baffle according to claim 1, wherein said baffle portion is constituted by two plate portions integrally connected to both ends of a mounting portion sandwiching said inner pillar. Construction. 3. The fuel tank baffle structure according to claim 2, wherein the front ends of the two plate portions are expanded in directions away from each other. 4. A baffle structure for a fuel tank according to claim 2, wherein a protrusion protruding from a resin tank main body is inserted into a space between said two plate portions. 5. The baffle structure for a fuel tank according to claim 2, wherein the two plate portions are displaced when viewed from a direction substantially perpendicular to the plate surface. . 6. A baffle structure for a fuel tank according to claim 5, wherein said two plate portions are arranged so as to partially overlap each other when viewed from a direction substantially perpendicular to the plate surface. 7. The fuel tank according to claim 2, wherein a plurality of flexible pieces are formed on at least a part of an outer edge of each of the plate portions. Baffle structure. 8. The method according to claim 1, wherein the outer shape of the inner pillar has a non-circular shape, and the mounting portion of the baffle member has a non-circular shape matching the non-circular shape. Fuel tank baffle structure. 9. The baffle member is made of a soft resin,
9. The baffle structure for a fuel tank according to claim 1, wherein a metal leaf spring surrounding the mounting portion is mounted around the mounting portion.