JP2016000579A - Mounting structure of cushion member of automobile fuel tank - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a mounting structure of a cushion member of an automobile fuel tank easy to be mounted without deviating the cushion member mounted between the fuel tank and a floor panel.SOLUTION: In a mounting structure of a cushion member 20 of an automobile fuel tank 10 mounted under a floor panel 1 of an automobile, the cushion member 20 is mounted between the fuel tank 10 and the floor panel 1. The cushion member 20 includes a cushion layer 22 and an adhesive sheet layer 21. A cushion seat surface 12 on which the adhesive sheet layer 21 of the cushion member 20 is mounted is formed in a portion facing the floor panel 1 on a top face of the fuel tank 10, and a plurality of cushion seat surface grooves 13 are formed in the cushion seat surface 12. The plurality of cushion seat surface grooves 13 are formed in each of different directions of at least two or more directions, and are formed to spread over substantially the whole area of the cushion seat surface 12 at prescribed intervals.

Description

The present invention relates to a mounting structure for a cushion member of a fuel tank for an automobile that is attached under the floor panel of the automobile.

Conventionally, a fuel tank for an automobile is often attached under a floor panel because of space. In this case, when the floor panel and the fuel tank are in direct contact with each other, there is a problem that the floor panel and the fuel tank are worn or abnormal noise is generated due to vibration or deflection during driving of the automobile. In addition, it was necessary to prevent peeling of the floor panel paint and damage to the fuel tank at the time of collision.

  Therefore, as shown in FIG. 6, there is a type in which the fuel tank 110 is attached to the vehicle body 2 with the attachment band 3 and a cushion member 130 is attached between the upper surface of the fuel tank 110 and the floor panel 1 (see, for example, Patent Document 1). .) Since the cushion member 130 is directly bonded to the surface of the fuel tank 110 with butyl tape or the like, the surface contacting the floor panel 1 is not uniform due to the shape of the upper surface of the fuel tank 110, and a large cushion is provided to ensure a contact area. Member 130 was required.

  Further, as shown in FIG. 7, a cushion seat surface 212 is formed on the upper surface of the fuel tank 210, and the double-sided adhesive tape 220 is attached to the cushion seat surface 212. In some cases, the release paper on the surface is peeled off and the cushion member 230 is attached.

In this case, the cushion seat surface 212 is flat and does not have a shape to which the double-sided adhesive tape 220 is caught. When the fuel tank 210 is mounted on the vehicle body, the internal pressure of the fuel tank 210 rises and falls, and the fuel tank 210 may expand or contract, and the cushion member 230 may shift or come off due to friction with the floor panel 1.
In addition, there is a protrusion formed around the cushion seat surface 212 to prevent the cushion member 230 from being displaced, but this is insufficient to prevent the displacement.

  Further, as shown in FIG. 8, there is a type in which a seat surface recess 313 is formed in a cushion seat surface 312 to which the cushion member 330 is attached, an adhesive 320 is injected into the seat surface recess 313, and the cushion member 330 is attached (for example, (See Patent Document 2). Even in this case, it takes time and effort to inject the adhesive 320 into the seating surface recess 313, resulting in an increase in cost.

Japanese Utility Model Publication No. 5-22137 JP2013-71538A

SUMMARY OF THE INVENTION An object of the present invention is to provide a cushion member mounting structure for a fuel tank for an automobile that is easy to mount without shifting the cushion member mounted between the fuel tank and the floor panel.

The present invention of claim 1 for solving the above-mentioned problem is a mounting structure for a cushion member of a fuel tank for an automobile mounted under a floor panel of an automobile.
Install a cushion member between the fuel tank and the floor panel,
The cushion member has a cushion layer and an adhesive sheet layer,
A cushion seat surface for attaching the adhesive sheet layer of the cushion member is formed on a portion facing the floor panel on the upper surface of the fuel tank, and a plurality of cushion seat surface grooves are formed on the cushion seat surface. A fuel tank for automobiles, wherein a plurality of the cushion seating surface grooves are formed in at least two different directions, and the cushion seating surface grooves are formed to extend over substantially the entire surface of the cushioning seating at a predetermined interval. This is a mounting structure of the cushion member.

According to the first aspect of the present invention, in the structure for mounting a cushion member for a fuel tank for an automobile mounted under the floor panel of the automobile, the cushion member is attached between the fuel tank and the floor panel. For this reason, even when the fuel tank and the floor panel come into contact or contact with each other during traveling of the vehicle, the impact can be absorbed and the noise and vibration of the fuel tank can be absorbed by the cushion member.

Since the cushion member has a cushion layer and an adhesive sheet layer, the cushion layer can absorb impact, vibration and noise, and the adhesive sheet layer can adhere the cushion member to the cushion seat surface of the fuel tank. It can be attached only by pressing the pressure-sensitive adhesive sheet layer against the cushion seat surface, and attachment is easy.

A cushion seat surface for attaching a cushion member was formed on a portion of the upper surface of the fuel tank facing the floor panel, and a plurality of cushion seat surface grooves were formed on the cushion seat surface. For this reason, while being able to attach a cushion member to a cushion seat surface stably, an adhesive sheet layer can enter into a cushion seat surface groove | channel, and a cushion seat surface and an adhesive sheet layer can adhere | attach firmly.

A plurality of cushion seating surface grooves are respectively formed in at least two different directions. For this reason, when the cushion member tends to shift from the cushion seat surface due to expansion or contraction of the fuel tank or vibration, a plurality of cushion seat surface grooves are formed in at least two different directions. Therefore, since there is a cushion seat surface groove different from the direction of the shift, the cushion seat surface groove can effectively stop the displacement of the cushion member, regardless of the direction.

Since the cushion seat groove was formed to spread over almost the entire surface of the cushion seat with a predetermined interval, it entered the cushion seat groove on the cushion seat with the entire surface of the adhesive sheet layer, The cushion member can be prevented from shifting in a well-balanced manner.

The present invention of claim 2 is a structure for mounting a cushion member of a fuel tank for an automobile, wherein the depth of the cushion seating surface groove is 1 to 2 mm, and the width of the cushion seating surface groove is 1.5 to 3 mm. is there.

In the present invention of claim 2, since the depth of the cushion seating surface groove is 1 to 2 mm and the width of the cushion seating surface groove is 1.5 to 3 mm, the cushion member is attached to the cushion seating surface. Moreover, the adhesive sheet layer can enter the cushion seating surface groove to prevent the cushion member from being displaced. When the depth of the cushion seating surface groove is less than 1 mm and the width is less than 1.5 mm, the adhesive sheet layer is less likely to enter, and the action of preventing the cushion member from shifting is small. When the width exceeds 2 mm and the width exceeds 3 mm, the strength of the cushion seat surface may be reduced.

The present invention of claim 3 is a mounting structure for a cushion member of a fuel tank for an automobile in which the cushion seating surface grooves are formed in two different directions in a C-shape.

In the third aspect of the present invention, since the cushion seat groove is formed in two different directions, the C-shaped cushion seat groove is displaced when the cushion member is displaced laterally or vertically. Even when the displacement direction of the cushion member is the same as one direction of the C-shaped, the other cushion seating surface groove can prevent the displacement.

The present invention of claim 4 is a mounting structure for a cushion member of a fuel tank for an automobile, wherein the cushion seating surface grooves are formed in two different directions so as to intersect with each other.

In the present invention of claim 4, since the cushion seating surface grooves are formed in two different directions so as to intersect with each other, when the cushion member is displaced in the horizontal direction or the vertical direction, the direction of deviation is the horizontal direction or the vertical direction. Even if the direction is the same, the other cushion seating surface groove can prevent displacement.

The present invention of claim 5 is a mounting structure for a cushion member of a fuel tank for automobiles, in which the distance between the cushion seating surface groove and the cushion seating surface groove is 7 to 15 mm.

In the present invention of claim 5, since the interval between the cushion seating surface groove and the cushion seating surface groove is 7 to 15 mm, the cushion seating surface groove can reliably prevent the cushion member from shifting. When the interval between the cushion seat surface grooves is less than 7 mm, the number of grooves is useless, and when the interval between the cushion seat surface grooves exceeds 15 mm, the effect of preventing the cushion seat surface grooves from shifting is reduced.

According to a sixth aspect of the present invention, there is provided a cushion member mounting structure for an automobile fuel tank in which the cushion layer of the cushion member is formed of a solid rubber sheet member and the adhesive sheet layer is formed of a butyl rubber tape layer.

In the present invention of claim 6, since the cushion layer of the cushion member is formed of a solid rubber sheet member, since it has flexibility and elasticity, vibration from the fuel tank can be absorbed reliably, and the floor panel The upper surface of the fuel tank is not damaged and has excellent durability. Since the pressure-sensitive adhesive sheet layer is formed of a butyl rubber tape layer, the pressure-sensitive adhesive force is strong and the durability is excellent.

The present invention of claim 7 is an attachment structure for a cushion member of a fuel tank for automobiles in which reinforcing fibers are embedded in an adhesive sheet layer.

In this invention of Claim 7, since the reinforcement fiber is embed | buried inside the adhesive sheet layer, the deformation | transformation with respect to the tensile force of an adhesive sheet layer is small, and the resistance force with respect to the shift | offset | difference of a cushion member is large.

The present invention according to claim 8 is an attachment structure for a cushion member of a fuel tank for an automobile in which a plurality of cushion seating surfaces are formed on the upper surface of the fuel tank.

In the present invention of claim 8, since a plurality of cushion seat surfaces are formed on the upper surface of the fuel tank, the cushion seat surfaces are provided at a plurality of portions on the upper surface of the fuel tank according to the shapes of the fuel tank and the floor panel. In addition, the load from the fuel tank to the floor panel can be dispersed by contacting the floor panel.

The present invention of claim 9 is the mounting structure of the cushion member of the fuel tank for automobiles, wherein the cushion member is substantially the same size as the cushion seating surface.

In the present invention of claim 9, since the cushion member is substantially the same size as the cushion seat surface, the cushion member is securely held by the cushion seat surface and can come into contact with the floor panel. It does not protrude from the cushion seat surface, and the cushion member does not get in the way when the fuel tank is attached to the vehicle body.

According to a tenth aspect of the present invention, the fuel tank is an attachment structure for a cushion member of an automobile fuel tank, wherein the fuel tank is made of synthetic resin or iron.

In the present invention of claim 10, since the fuel tank is made of synthetic resin or iron, when it is made of synthetic resin, the fuel tank can be lightened, and the fuel tank can be made by blow molding or injection molding. When molding, it is easy to form a cushion seat with a molding die. When it is made of iron, a fuel tank with high strength can be formed and the fuel tank can be formed by press molding. At the same time, formation of the cushion seat surface is easy.

Since a plurality of cushion seating surface grooves are formed in each of at least two different directions, there is a cushion seating surface groove that is different from the direction of displacement regardless of which direction the cushion seating surface groove is formed. The displacement of the cushion member can be effectively stopped.
Because the cushion seat groove is formed to spread over almost the entire surface of the cushion seat with a predetermined interval, the adhesive sheet layer enters the cushion seat groove on the cushion seat at the entire surface, and the cushion seat surface The displacement of the cushion member can be stopped.

It is the perspective view seen from diagonally the fuel tank of the state which provided the cushion seat surface and the cushion seat surface groove | channel in the fuel tank which is the 1st Embodiment of this invention, and attached a cushion member. It is the top view which provided the cushion seat surface groove | channel on the cushion seat surface in the fuel tank which is the 1st Embodiment of this invention. It is the top view which provided the cushion seat surface groove | channel on the cushion seat surface in the fuel tank which is the 2nd Embodiment of this invention. It is sectional drawing of the part which adhere | attached the cushion member on the cushion seating surface of the upper surface of the fuel tank which is the 1st Embodiment of this invention, and contact | abutted to the floor panel. It is the perspective view seen from diagonally upward of the fuel tank which is embodiment of this invention. It is sectional drawing of the state which attached the conventional fuel tank to the floor panel. It is sectional drawing of the part which provided the cushion seat surface in the conventional fuel tank, adhere | attached the cushion member on the cushion seat surface, and contact | abutted to the floor panel. It is sectional drawing of the part which provided the cushion seat surface in the other conventional fuel tank, provided the adhesive agent in the cushion seat surface, adhere | attached the cushion member, and contact | abutted to the floor panel.

A mounting structure for a cushion member 20 of a fuel tank 10 for an automobile according to an embodiment of the present invention will be described with reference to FIGS.
As shown in FIG. 5, the fuel tank 10 used in the embodiment of the present invention has a pump for inserting / removing a fuel pump (not shown) or the like into / from the upper tank 11 of the fuel tank 10. A unit 50 is attached to the upper surface, and a hose for delivering fuel from the fuel tank 10 is attached.

Further, a filler hose 40 connected to an inlet pipe (not shown) for injecting fuel into the fuel tank 10 from a fuel filler opening (not shown) provided in the vehicle body 2 is attached to the fuel tank 10. Also, an electric cord for driving the fuel pump and various pipes for adjusting the evaporated fuel in the fuel tank 10 are attached.

Although the fuel tank 10 is made of metal or synthetic resin, any fuel tank 10 can be used in the present invention. In the present embodiment, a synthetic resin fuel tank 10 will be described as an example.
In the case of the metal fuel tank 10, iron, stainless steel, or the like can be used.

In the case of the fuel tank 10 made of synthetic resin, it is formed in a shape that matches the space of the mounting portion of the vehicle body 2 and is formed of one layer of high-density polyethylene (HDPE), or a skin layer, a barrier layer, and a main body layer. What was formed by the multilayer structure can be used. In the case of a multilayer structure, the skin layer and the main body layer are formed from a thermoplastic synthetic resin that has high impact resistance and maintains rigidity against fuel oil, and may be formed from high-density polyethylene (HDPE). preferable. As the thermoplastic synthetic resin constituting the barrier layer, for example, ethylene vinyl alcohol copolymer (EVOH), polybutylene terephthalate, polyphenylene sulfide (PPS) or the like is preferably used.

Next, the floor panel 1 formed in the lower part of the vehicle body 2 of the automobile will be described. The floor panel 1 is a panel that forms a lower surface of a vehicle interior of an automobile, and is formed of an iron plate. As shown in FIG. 6, a fuel tank 10 is attached to the vehicle body 2 with a mounting band 3, bolts, nuts and the like below the floor panel 1.

Next, the cushion member 20 attached between the floor panel 1 and the fuel tank 10 will be described. As shown in FIGS. 1 and 4, the cushion member 20 includes an adhesive sheet layer 21 and a cushion layer 22. The cushion layer 22 contacts the floor panel 1 and absorbs the cushion layer 22 so that impact, vibration, and noise are not transmitted from the fuel tank 10 during traveling to the vehicle body.

The pressure-sensitive adhesive sheet layer 21 is adhered to a cushion seat surface 12 formed on the upper wall 11 of the fuel tank 10 to be described later, so that the cushion member 20 can be adhered to the fuel tank 10. The cushion member 20 can be attached only by pressing the pressure-sensitive adhesive sheet layer 21 against the cushion seat surface 12, and the attachment is easy.

The cushion layer 22 of the cushion member 20 is preferably formed of a solid rubber sheet member. In this case, since it has flexibility and elasticity, vibrations from the fuel tank 10 can be reliably absorbed, and the upper surface of the floor panel 1 and the fuel tank 10 is not damaged. As the solid rubber, durable rubber such as EPDM can be used.

As the adhesive sheet layer 21, an adhesive rubber sheet or the like can be used. For example, it is preferable to form with a butyl rubber tape layer. In this case, the adhesive strength is strong and the durability is excellent.
It is preferable that reinforcing fibers are embedded in the pressure-sensitive adhesive sheet layer 21. In this case, the deformation of the adhesive sheet layer 21 with respect to the pulling force is small, and the resistance force against the displacement of the cushion member 20 is large.

As shown in FIG. 4, when the fuel tank 10 is attached to the lower part of the floor panel 1, the cushion seat surface 12 and the cushion member 20 are formed in a flat shape. The contacting cushion member 20 is positioned in parallel with the back surface of the floor panel 1 to stabilize the contact with the floor panel 1, and the load per unit area from the fuel tank 10 to the floor panel 1 due to vibration of the automobile or the like. Can be dispersed.

The cushion member 20 is preferably substantially the same size as the cushion seat surface 12. In this case, the cushion member 20 can be reliably held on the cushion seat surface 12. Further, the cushion member 20 does not protrude from the cushion seat surface 12, and when the fuel tank 10 is attached to the vehicle body, the cushion member 20 does not come into contact with a part of the vehicle body or the like so that it does not get in the way.

Next, the upper surface of the fuel tank 10 used in the present invention will be described with reference to FIG. A plurality of cushion seat surfaces 12 formed in a planar shape are formed on the upper wall 11 of the fuel tank 10. In the present embodiment, five cushion seat surfaces 12 are formed. The cushion seat surface 12 is formed in a planar shape so as to face the floor panel 1 and abut against the floor panel 1 via a cushion member 20 described later.

A plurality of cushion seat surfaces 12 are preferably formed on the upper surface of the fuel tank 10. In this case, the cushion seat surface 12 can be provided in a plurality of portions on the upper surface of the fuel tank 10 in accordance with the shapes of the fuel tank 10 and the floor panel 1, and the fuel tank 10 can be stably applied to the floor panel 1. In addition, the load from the fuel tank 10 to the floor panel 1 can be dispersed by contacting the floor panel 1.

The size of the cushion seat surface 12 can be formed, for example, about 60 mm long and 60 mm wide, but the size can be appropriately changed depending on the portion where the cushion seat surface 12 is provided. The cushion seat surface 12 is preferably provided so as to protrude outward from the surface of the upper wall 11 of the fuel tank 10 by about 10 to 20 mm. Thereby, the contact with the upper wall 11 of the fuel tank 10 in which the cushion seat surface 12 is not provided, and the floor panel 1 can be prevented. If it is less than 10 mm, sufficient contact prevention effect is not obtained, and if it exceeds 20 mm, the gap between the floor panel 1 and the fuel tank 10 becomes large, and the installation space for the fuel tank 10 becomes large. It becomes.

In the first embodiment, as shown in FIGS. 1 and 2, a cushion seat surface 12 for attaching the cushion member 20 is formed on a portion of the upper wall 11 of the fuel tank 10 facing the floor panel 1. A plurality of cushion seating surface grooves 13 are formed in each of 12. For this reason, the adhesive sheet layer 21 of the cushion member 20 described later enters the cushion seating surface groove 13, and the cushion seating surface 12 and the adhesive sheet layer 21 can adhere firmly.

A plurality of cushion seating surface grooves 13 formed on each of the cushion seating surfaces 12 are formed in plural in at least two different directions. Therefore, when the cushion member 20 contacting the floor panel 1 tends to be displaced from the cushion seat surface 12 of the fuel tank 10 due to expansion, contraction, vibration, or the like of the fuel tank 10, the cushion seat surface groove 13 is at least Since a plurality of different directions are formed in two or more directions, there is a cushion seat surface groove 13 that is different from the direction of the displacement, so that the cushion seat surface groove 13 causes the cushion member 20 to be displaced. It can be effectively stopped.

In the first embodiment of the present invention, as shown in FIG. 2, the cushion seat surface groove 13 formed in the cushion seat surface 12 is formed in two directions different from each other in a letter C shape. When the cushion member 20 is displaced in the horizontal direction or the vertical direction, the C-shaped cushion seat groove 13 is formed in an opposite direction, and therefore the cushion seat groove 13 formed on the upper side in FIG. The cushion seating surface groove 13 formed on the lower side can work so as to cancel out the direction of displacement. Further, even if the cushion member 20 is displaced obliquely and the displacement direction of the cushion member 20 is the same as the one direction of the C-shape, the other cushion seating surface groove 13 can prevent the displacement.

In the second embodiment of the present invention, as shown in FIG. 3, the cushion seat surface groove 13 is formed in two different directions so as to intersect the vertical direction and the horizontal direction at right angles. When the cushion member 20 is displaced in the lateral direction or the longitudinal direction, even if the direction of displacement is the same as the lateral direction or the longitudinal direction in which the cushion seat surface groove 13 is formed, the other cushion seat surface groove 13 is displaced. Can be prevented.
Further, even when the cushion member 20 is obliquely displaced, the cushion seat surface groove 13 formed in the lateral direction and the longitudinal direction can work so as to cancel the direction of displacement.

The cushion seat surface groove 13 is formed to spread over the entire surface so as to widely cover the cushion seat surface 12 with a predetermined interval. In that case, the adhesive sheet layer 21 enters the cushion seat groove 13 over the entire cushion seat surface 12, and the displacement of the cushion member 20 can be stopped over the entire cushion seat surface 12.

It is preferable that the space | interval of the cushion seat surface groove | channel 13 and the cushion seat surface groove | channel 13 is 7-15 mm. In this case, the cushion member 20 is firmly adhered to the cushion seat surface 12, and the cushion seat surface groove 13 can reliably prevent the cushion member 20 from being displaced. When the interval between the cushion seating surface grooves 13 is less than 7 mm, the effect of preventing the shift does not increase, the number of grooves is useless, and when the interval between the cushion seating surface grooves 13 exceeds 15 mm, the cushion The effect of preventing the seat groove 13 from shifting is reduced.

The depth of the cushion seating surface groove 13 is preferably 1 to 2 mm, and the width of the cushion seating surface groove 13 is preferably 1.5 to 3 mm. In this case, when the cushion member 20 is attached to the cushion seat surface 12, the adhesive sheet layer 21 can enter the cushion seat surface groove 13 to prevent the cushion member 20 from shifting.

When the depth of the cushion seating surface groove 13 is less than 1 mm and the width is less than 1.5 mm, the adhesive sheet layer 21 is less likely to enter the cushion seating surface groove 13 and prevents the cushion member 20 from shifting. small. When the depth of the cushion seat surface groove 13 exceeds 2 mm and the width exceeds 3 mm, the strength of the upper wall 11 of the fuel tank 10 on which the cushion seat surface 12 is formed may be reduced.

DESCRIPTION OF SYMBOLS 1 Floor panel 10 Fuel tank 12 Cushion seat surface 13 Cushion seat surface groove | channel 20 Cushion member 21 Adhesive sheet layer 22 Cushion layer

Claims (10)

In the mounting structure of the cushion member of the fuel tank for automobiles attached under the floor panel of the automobile,
A cushion member is attached between the fuel tank and the floor panel,
The cushion member has a cushion layer and an adhesive sheet layer,
A cushion seat surface for attaching the adhesive sheet layer of the cushion member is formed on a portion of the upper surface of the fuel tank facing the floor panel, and a plurality of cushion seat surface grooves are formed on the cushion seat surface. A plurality of surface grooves are formed in each of at least two different directions, and the cushion seat groove is formed to extend over substantially the entire cushion seat surface at a predetermined interval. A structure for mounting a cushion member of an automobile fuel tank. 2. The structure for mounting a cushion member for a fuel tank for an automobile according to claim 1, wherein a depth of the cushion seating surface groove is 1 to 2 mm, and a width of the cushion seating surface groove is 1.5 to 3 mm. The said cushion seating surface groove | channel is a mounting structure of the cushion member of the fuel tank for motor vehicles of Claim 1 or Claim 2 formed in two directions which differed in C shape. The structure for mounting a cushion member of a fuel tank for an automobile according to claim 1, wherein the cushion seating surface grooves are formed in two different directions so as to intersect with each other. The mounting structure for a cushion member of a fuel tank for an automobile according to any one of claims 1 to 4, wherein an interval between the cushion seating surface groove and the cushion seating surface groove is 7 to 15 mm. 6. The automobile fuel tank according to claim 1, wherein the cushion layer of the cushion member is formed of a solid rubber sheet member, and the adhesive sheet layer is formed of a butyl rubber tape layer. Cushion member mounting structure. The attachment structure of the cushion member of the fuel tank for automobiles according to any one of claims 1 to 6, wherein reinforcing fibers are embedded in the adhesive sheet layer. 8. The structure for mounting a cushion member for an automobile fuel tank according to claim 1, wherein a plurality of the cushion seating surfaces are formed on the upper surface of the fuel tank. The structure for mounting a cushion member for a fuel tank for an automobile according to any one of claims 1 to 8, wherein the cushion member has substantially the same size as the cushion seating surface. The structure for mounting a cushion member of a fuel tank for an automobile according to any one of claims 1 to 9, wherein the fuel tank is made of synthetic resin or iron.