JP6635907B2 - Pipe mounting structure - Google Patents

Description

The present invention relates to a pipe mounting structure for mounting on a hollow member such as an automobile fuel tank.

A pipe for injecting fuel into the fuel tank, sending fuel to the engine, and sending fuel gas to the canister is attached to a hollow member, for example, a fuel tank for an automobile.
Conventionally, such fuel tanks are made of metal.However, in recent years, a fuel tank made of a thermoplastic resin has been used due to a reduction in the weight of a vehicle, rust does not occur, and it is easy to mold into a desired shape. It is being used.

  As shown in FIG. 5, a filler pipe for injecting fuel into the fuel tank 1 together with an attachment member for mounting various kinds of pipes and fuel parts is used in any of the fuel tanks 1 made of metal or thermoplastic resin. A filler pipe mounting member 120 for mounting 140 is mounted on the outer wall of the fuel tank 1.

For example, as shown in FIG. 6, a filler pipe mounting member 120 for mounting a filler pipe 140 is welded to a tank outer wall 102 of a fuel tank 101 made of a thermoplastic synthetic resin (for example, see Patent Document 1). The filler pipe mounting member 120 has a cylindrical portion 121 penetrating inside and outside the fuel tank 101, and a flange portion 122 for mounting the cylindrical portion 121 to the tank outer wall 102.

A welding portion 123 is formed on the flange portion 122, and the welding portion 123 is welded to the tank outer wall 102, and the flange portion 122 is attached to fix the cylindrical portion 121 to the tank outer wall 102.
The filler pipe 140 is inserted into the cylindrical portion 121, and the filler pipe 140 is attached to the fuel tank 101.
However, in this case, once the filler pipe 140 is attached to the fuel tank 101, it is difficult to remove the filler pipe 140 for repair or the like.

As shown in FIG. 7, a filler pipe attachment member 220 for attaching a filler pipe 240 is welded to a tank outer wall 202 of a fuel tank 201 made of a thermoplastic synthetic resin, and the filler pipe attachment member 220 and the filler pipe 240 are connected to a rubber hose 250. Some are connected by.
In this case, the flange portion 222 of the filler pipe attachment member 220 is welded to the tank outer wall 202, and the cylindrical portion 221 of the filler pipe attachment member 220 communicates with the inside and outside of the tank outer wall 202 and is positioned.

One end of a rubber hose 250 is attached to a portion of the cylindrical portion 221 of the filler pipe attachment member 220 outside the tank outer wall 202, and the other end of the rubber hose 250 is attached to an end of the filler pipe 240. Both ends of the rubber hose 250 are fastened with a pipe band 251.
In this case, the filler pipe 240 can be removed, but the number of parts is increased, the assembling is troublesome, and the cost is also increased.

JP 2005-41298 A

  In view of the above, an object of the present invention is to provide a pipe mounting structure in which a hollow member and a pipe can be removed, and the pipe can be easily assembled.

In order to solve the above problems, the present invention of claim 1 provides a pipe mounting structure for mounting on a hollow member,
A pipe mounting member for attaching a pipe to the outer wall of the hollow member, inserting the pipe into the pipe attaching member, and attaching the pipe.
The pipe mounting member includes a mounting flange portion mounted on an outer wall of the hollow member, a pipe mounting tubular portion extending from an upper surface of the mounting flange portion and positioned outside the outer wall of the hollow member, and extending from a lower surface of the mounting flange portion. Having a tank inner cylinder located inside the hollow member,
A seal member is provided between the pipe attachment member and a pipe tip provided at the tip of the pipe and attached to the pipe attachment member, wherein the seal member is a seal tubular portion located between the pipe attachment member and the filler pipe. Having a seal engagement portion that engages with the pipe tip,
The seal engagement portion has a seal engagement portion groove formed in a groove shape on the outer periphery of the lower end of the seal cylindrical portion, and a pipe tip is inserted into the seal engagement portion groove,
Forming a pipe tip projection on the outer peripheral side of the pipe tip that contacts the inner surface of the seal engagement groove,
A ring-shaped pipe tip recess is formed on the outer peripheral surface of the pipe tip, and a ring-shaped seal engagement projection that engages with the ring-shaped pipe tip recess at the pipe tip in the seal engagement groove of the seal engagement. Forming a strip,
A pipe mounting structure characterized in that a seal tubular portion is sandwiched between a pipe distal end portion and a pipe mounting tubular portion, and the pipe distal end portion is held by a seal engaging portion to attach the pipe to a hollow member.

According to the first aspect of the present invention, in the pipe mounting structure for mounting on a hollow member, the pipe mounting member for mounting the pipe is mounted on the outer wall of the hollow member, the pipe is inserted into the pipe mounting member, and the pipe is mounted on the pipe. The pipe mounting member has a mounting flange portion mounted on the outer wall of the hollow member, a pipe mounting tubular portion extending from the upper surface of the mounting flange portion and located outside the outer wall of the hollow member, and a lower surface of the mounting flange portion. It has a tank inner cylinder part which is extended and located inside the hollow member.

For this reason, by attaching the mounting flange portion of the pipe mounting member to the outer wall of the hollow member, the pipe mounting tube portion can be located on the outer wall of the hollow member, and the pipe can be mounted. The fuel and the like can be injected into the hollow member from the pipe by being located inside.

A seal member is provided between the pipe attachment member and a pipe tip provided at the tip of the pipe and attached to the pipe attachment member, wherein the seal member is a seal tubular portion located between the pipe attachment member and the filler pipe. And a seal engaging portion that engages with the pipe tip. For this reason, the space between the pipe and the pipe mounting member can be sealed by the seal tubular portion of the seal member, and the tip end of the pipe can be held by the seal engagement portion. Further, the pipe can be easily removed from the pipe mounting member by elastically deforming the seal member and pulling out the pipe tip.
The seal engagement portion of the seal member has a seal engagement portion groove formed in a groove shape on the outer periphery of the lower end of the seal tubular portion, and a pipe tip is inserted into the seal engagement portion groove. For this reason, if the pipe tip is inserted into the groove of the seal engagement portion and pressed, the pipe tip can be easily attached to the pipe attaching member together with the seal member. Also, the seal engagement portion groove holds the tip of the pipe tip, and the space between the pipe tip and the seal engagement portion groove can be sealed.
Since a pipe tip projection is formed on the outer peripheral side of the pipe tip to abut against the inner surface of the seal engagement groove, the seal engagement groove can securely hold the pipe tip, and the pipe tip projection can be used as the seal engagement. By pressing the inner surface of the joint groove, the sealing performance is improved and the assembly is easy.
A ring-shaped pipe tip concave portion is formed on the outer peripheral surface of the pipe tip portion, and a ring-shaped seal engaging portion protrusion that engages the ring-shaped pipe tip concave portion of the pipe tip portion in the seal engaging portion groove of the seal engaging portion. The ridge was formed. For this reason, the sealing property between the outer peripheral surface of the pipe tip and the groove of the seal engaging portion can be improved.

Since the seal tubular portion is sandwiched between the pipe distal end portion and the pipe mounting tubular portion, the space between the pipe and the pipe mounting member can be sealed by the seal tubular portion of the seal member.
Since the pipe end is held by the seal engagement portion and the pipe is attached to the hollow member, the pipe end can be inserted into the seal engagement portion, and the seal member and the pipe end can be attached to the pipe attachment member. it can.

According to a second aspect of the present invention, there is provided a pipe mounting structure in which the pipe mounted on the hollow member is a filler pipe for injecting fuel into a fuel tank.

According to the second aspect of the present invention, since the pipe attached to the hollow member is a filler pipe for injecting fuel into the fuel tank, the tip of the filler pipe is attached to the pipe attaching member with a simple structure, and the filler pipe is firmly held. can do. Further, it is easy to remove the filler pipe from the fuel tank.

According to a third aspect of the present invention, a ring-shaped pipe-mounting tube-shaped ridge is formed on the outer peripheral surface of the pipe-mounting tube-shaped portion, the ring-shaped pipe-mounting tube-shaped ridge being in contact with the inner surface of the seal tube-shaped portion of the seal member. Is a pipe mounting structure in which is pressed against a seal tubular portion.

According to the third aspect of the present invention, a ring-shaped pipe-mounting tube ridge that is in contact with the inner surface of the seal tube-shaped portion of the seal member is formed on the outer peripheral surface of the pipe-mounting tube. Was pressed against the seal tubular portion. For this reason, it is possible to improve the sealing performance between the pipe mounting tubular portion of the pipe mounting member and the sealing tubular portion of the sealing member, and it is possible to prevent the seal member from coming off the pipe mounting tubular portion.

According to a fourth aspect of the present invention, the thickness of the distal end side of the seal tubular portion of the seal member is formed to be larger than the thickness of the side on which the seal engagement portion is provided, and the portion where the thickness changes is inclined. It is a mounting structure of a pipe formed in a shape.

According to the fourth aspect of the present invention, the thickness of the distal end side of the seal tubular portion of the seal member is formed to be larger than the thickness of the side on which the seal engagement portion is provided, and the portion where the thickness changes is inclined. It was formed in a shape. For this reason, the part which comes into contact with the tip of the pipe mounting cylinder is made thicker, and the adhesion between the tip of the sealing cylinder and the tip of the pipe mounting cylinder is improved, thereby improving the sealing performance and the holding power. be able to. Since the portion where the wall thickness changes is formed in the shape of an inclined surface, the friction between the pipe mounting tubular portion and the seal tubular portion is reduced when the pipe mounting tubular portion is inserted, and insertion becomes easy.

According to a fifth aspect of the present invention, the seal member is a pipe mounting structure formed of synthetic rubber.

According to the fifth aspect of the present invention, since the seal member is formed of synthetic rubber, the seal member has elasticity, is easily deformed, and can be easily assembled and removed. And the sealing property can be improved.

According to a sixth aspect of the present invention, the pipe mounting member is a pipe mounting structure formed of synthetic resin or metal.

According to the sixth aspect of the present invention, the pipe mounting member is formed of synthetic resin or metal. When made of synthetic resin, it can be firmly welded to a hollow member made of synthetic resin, which contributes to weight reduction of parts, does not generate rust, and has excellent durability. When formed of metal, rigidity can be increased.

The present invention according to claim 7 is a pipe mounting structure in which the outer peripheral surface of the pipe tip is fastened by a pipe band.

According to the seventh aspect of the present invention, since the outer peripheral surface of the pipe tip is fastened by the pipe band, the pipe tip can be firmly attached to the pipe attaching member, and the seal member can be strongly sandwiched to improve the sealing performance. Also, if the pipe band is removed, the tip of the pipe can be easily removed.

A seal member is provided between the pipe attachment member and a pipe tip provided at the tip of the pipe and attached to the pipe attachment member, and the seal member sandwiches the seal tubular portion between the pipe tip and the pipe attachment cylinder. Therefore, the space between the pipe and the pipe mounting member can be sealed by the seal tubular portion of the seal member. Since the pipe end is held by the seal engagement portion and the pipe is attached to the hollow member, the pipe end is inserted into the seal engagement portion, and the seal member and the pipe end are easily attached to the pipe attachment member. be able to

FIG. 1 shows an embodiment of the present invention, and is a cross-sectional view of a state where a seal member and a pipe tip are attached to a filler pipe attachment member. FIG. 4 is a cross-sectional view showing a step of attaching a seal member and a pipe tip to a filler pipe attachment member in the embodiment of the present invention, in which the seal member is attached to the pipe tip. In the embodiment of the present invention, it shows a step of attaching a seal member and a pipe tip to a filler pipe attachment member, and attaches a seal member to a pipe tip portion, and is a cross-sectional view of a state in the middle of being inserted into the filler pipe attachment member. is there. FIG. 4 is a cross-sectional view illustrating a step of attaching a seal member and a pipe tip to a filler pipe attachment member according to the embodiment of the present invention, in which the seal member is attached to the pipe tip and inserted into the filler pipe attachment member. It is sectional drawing of a fuel tank. It is sectional drawing of the attachment part of the filler pipe attachment member of the conventional fuel tank. It is sectional drawing of the attachment part of the filler pipe attachment member of another conventional fuel tank.

The present invention can be widely used for a pipe mounting structure to be mounted on a hollow member. The embodiment of the present invention will be described with reference to FIGS. 1 to 5 by taking a fuel tank 1 and a filler pipe 40 as examples. Further, it can be used for mounting various pipes and hoses used for the fuel tank 1.
FIG. 5 is a cross-sectional view of the fuel tank 1 in which the mounting structure of the filler pipe 40 according to the embodiment of the present invention is used.

As shown in FIG. 5, the fuel tank 1 is formed by blow molding, and the tank outer wall 2 is formed integrally. The tank outer wall 2 can be formed of a single layer of a thermoplastic synthetic resin, or can be formed to have a plurality of layers of a thermoplastic synthetic resin.
When it is formed of a plurality of layers, it can be formed by combining a layer having rigidity and a layer having low fuel permeability.

When formed of a plurality of layers, for example, a central layer is formed of ethylene-vinyl alcohol copolymer (EVOH) or a barrier layer for preventing fuel permeation formed of nylon, and a modified polyethylene is formed above and below the barrier layer. And an outer layer formed of high-density polyethylene (HDPE) on each outer surface of the adhesive layer.

  A filler pipe mounting member 20 shown in FIG. 1 and a pipe mounting portion 10 which is a flat portion on which the filler pipe mounting member 20 is mounted are formed on an upper portion of the tank outer wall 2. The filler pipe mounting member 20 is for mounting a filler pipe 40 for injecting fuel into the fuel tank 1.

As shown in FIG. 5, a breather port mounting portion 7 is also formed on the upper portion of the tank outer wall 2. The breather port mounting portion 7 is for mounting a breather hose (not shown) for allowing gas in the fuel tank 1 to escape to the outside of the tank when fuel is supplied. Reference numeral 8 denotes a cutoff valve for preventing fuel leakage from the fuel tank 1 when the vehicle falls.
A hose clamp for holding various hoses such as a fuel transfer hose may be provided on the upper surface of the tank outer wall 2. The present invention can also be used for an attachment member to which these hoses are attached.

  A fuel pump mounting hole 4 is further formed on the upper surface of the tank outer wall 2, and a sub tank 5 is mounted on the lower inner surface of the tank outer wall 2 from the fuel pump mounting hole 4. The fuel pump mounting hole 4 is closed by a lid 50, and the lid 50 is screwed around the fuel pump mounting hole 4 by a lock plate 51. A seal ring 52 is mounted between the fuel pump mounting hole 4 and the lid 50 to seal between the fuel pump mounting hole 4 and the lid 50.

The fuel pump unit 6 is mounted in the sub tank 5. The sub tank 5 is provided so that the fuel pump unit 6 can reliably send out the fuel in the fuel tank 1 to the engine when the vehicle is tilted or vibrated. The fuel pump unit 6 is attached to the lid 50, and repair and maintenance are performed. A pipe extends from the fuel pump unit 6, and a fuel main port mounting portion 9 is connected to a lid 50 on the upper portion of the tank outer wall 2. A fuel pipe (not shown) for sending fuel to the engine is attached to the fuel main port attachment portion 9.

As shown in FIG. 5, a pipe mounting portion 10 is formed on the upper portion of the tank outer wall 2 of the fuel tank 1. As shown in FIGS. 3 and 4, the pipe mounting portion 10 includes a tank opening 11 that is a hole formed in the fuel tank 1 for mounting a filler pipe mounting member 20 described later, and a pipe opening formed around the tank opening 11. A mounting member holding flange 12 for mounting the pipe mounting member 20 is formed. The mounting member holding flange 12 has a flat upper surface for mounting the filler pipe mounting member 20.

The filler pipe 40 is a pipe that connects a fuel inlet (not shown) of the vehicle body to the fuel tank 1 and is formed of a fuel oil-resistant synthetic resin or the like. The distal end of the filler pipe 40 is formed with a filler pipe distal end portion 41 formed in a cylindrical shape. As shown in FIG. 1, the filler pipe tip 41 may be formed to have a diameter larger than the body of the filler pipe 40.

As shown in FIG. 1, the filler pipe distal end portion 41 can form a filler pipe distal end projection 43 bent in the outer peripheral direction. In addition, as shown in FIG. 2, a ring-shaped filler pipe tip concave portion 42 can be formed on the outer peripheral surface of the filler pipe tip portion 41 slightly away from the tip end. The filler pipe tip protrusion 43 and the filler pipe tip recess 42 can improve the sealing property between the seal engagement portion groove 33a of the seal member 30 described later.

Next, based on FIGS. 1 and 2, the filler pipe mounting member 20 which is a pipe mounting member, and the seal member 30 used between the filler pipe mounting member 20 and the filler pipe tip 41 will be described.
The filler pipe mounting member 20 includes a filler pipe mounting cylindrical portion 21 for inserting a filler pipe tip 41 at a distal end of the filler pipe 40, a tank inner cylindrical portion 22 located inside the fuel tank 1, and mounting of the pipe mounting portion 10. It has a mounting flange portion 23 that is mounted on the member holding flange 12.

The mounting flange portion 23 is formed in a disk shape having a center hole 25 through which the filler pipe mounting cylindrical portion 21 and the tank inner cylindrical portion 22 pass, and a lower surface (a surface facing the mounting flange portion 23) is provided with a lower portion. A mounting flange portion tip portion 24 projecting in a ring shape is formed. The mounting flange portion tip 24 is welded or bonded to the mounting member holding flange 12 of the tank outer wall 2.

For this reason, it is preferable that the mounting flange portion 23 be formed of the same material as the outer surface of the tank outer wall 2 of the fuel tank 1. Since the mounting flange portion distal end portion 24 is welded or bonded to the mounting member holding flange 12, the mounting flange portion 23 is firmly fixed to the pipe mounting portion 10, and between the mounting flange portion distal end portion 24 and the mounting member holding flange 12. Sealability can be secured.

A cylindrical filler pipe mounting cylindrical portion 21 is formed from the periphery of the center hole 25 on the upper surface of the mounting flange portion 23 to the outside of the tank outer wall 2. The filler pipe tip 41 of the filler pipe 40 is attached to the filler pipe attachment cylinder 21 via the seal member 30. On the outer periphery near the tip of the filler pipe attachment tube portion 21, a filler pipe attachment tube portion protrusion 21a protruding outward in a ring shape can be formed.

A cylindrical tank inner tube portion 22 is formed from the periphery of the center hole 25 on the lower surface of the mounting flange portion 23 toward the inside of the fuel tank 1. Therefore, when the mounting flange portion 23 is mounted on the pipe mounting portion 10, the tank inner tube portion 22 can be mounted so as to be located on the inner side of the fuel tank 1 with respect to the surface of the tank outer wall 2 of the fuel tank 1.

The filler pipe mounting member 20 is formed by injection molding separately from the fuel tank 1. It is preferable that the filler pipe mounting cylinder 21 and the tank inner cylinder 22 and the mounting flange 23 are made of the same material. When formed of different materials, it is necessary that the material of the filler pipe mounting tube portion 21 and the tank inner tube portion 22 and the material of the mounting flange portion 23 be fused to each other during injection molding.

The same material as the material of the tank outer wall 2 is used for the mounting flange portion 23. For example, high-density polyethylene, polypropylene, or the like, which is easy to bond and has high rigidity, is used. Thereby, the mounting flange portion distal end portion 24 is fused to the tank outer wall 2.
For the filler pipe mounting tubular portion 21 and the tank inner tubular portion 22, a synthetic resin such as polyacetal or polyamide, which is a fuel oil resistant material, can be used.
Note that the filler pipe mounting member 20 can also be formed of metal. In this case, the rigidity of the filler pipe attachment member 20 can be increased.

Next, the seal member 30 will be described.
As shown in FIG. 1, the seal member 30 includes a seal tubular portion 31 located between the filler pipe attachment tube portion 21 of the filler pipe attachment member 20 and the filler pipe tip portion 41 of the filler pipe 40, and a filler pipe tip portion. It has a seal engaging portion 33 that engages with the portion 41.

At the tip of the seal tubular portion 31, a seal member tip 32 projecting in the inner diameter direction is formed in a ring shape. As shown in FIG. 4, the seal member distal end portion 32 can contact the distal end of the filler pipe mounting tubular portion 21 to seal between the filler pipe mounting member 20 and the seal member 30.

It is possible to form the seal tubular portion thick portion 31a in which the thickness of the distal end side of the seal tubular portion 31 of the seal member 30 is greater than the thickness of the seal tubular portion 31 on the side where the seal engaging portion 33 is provided. In this case, the sealing force between the thick portion 31a of the seal tubular portion and the distal end side of the seal tubular portion 31 can be improved, and the sealing performance and the holding force can be improved.

As shown in FIG. 2, a portion of the seal tubular portion 31 below the seal tubular portion thick portion 31a is thinner than the seal tubular portion thick portion 31a, and the thickness changes. The boundary portion, which is a portion, forms a sealing member inclined surface 34. For this reason, when the seal tubular portion 31 of the seal member 30 and the filler pipe tip 41 of the filler pipe 40 are inserted into the filler pipe mounting tubular portion 21, friction is reduced to the seal member inclined surface 34 by reducing the friction. In the member inclined surface 34, the friction between the filler pipe mounting tubular portion 21 and the seal tubular portion 31 is reduced, and insertion becomes easy.

When the filler pipe mounting member 20 is provided with the filler pipe mounting tube portion ridge 21a, the filler pipe mounting tube portion ridge 21a is pressed into the filler pipe mounting tube 21 to improve the sealing property and the holding force. Can be improved.
When the seal tubular portion thick portion 31a is formed, the filler pipe mounting tubular portion ridge 21a is pressed into the seal tubular portion thick portion 31a to further improve the sealing performance and the holding force. Can be done.

A seal engagement portion 33 that engages with the tip end portion 41 of the filler pipe is formed at the lower end of the seal tubular portion 31. As shown in FIG. 1, the seal engagement portion 33 has a seal engagement portion groove 33 a formed in a ring-shaped groove on the outer periphery of the lower end of the seal tubular portion 31. The seal engaging portion groove 33a has a seal engaging portion outer peripheral wall 33b forming the outer periphery thereof. When the filler pipe tip 41 is attached to the seal member 30, the filler pipe tip 41 is inserted into the seal engagement groove 33a, and the seal engagement outer peripheral wall 33b holds the filler pipe tip 41. .

For this reason, if the filler pipe tip 41 is inserted into the seal engagement groove 33 a and pressed along the filler pipe attachment cylinder 21, the filler pipe tip 41 can be easily attached to the filler pipe attachment member 20 together with the seal member 30. Can be mounted on Further, the seal engaging portion groove 33a holds the distal end of the filler pipe distal end portion 41, so that the space between the filler pipe distal end portion 41 and the seal engaging portion groove 33a can be sealed.

As shown in FIG. 2, a ring-shaped filler pipe tip concave portion 42 is formed on the outer peripheral surface of the filler pipe tip portion 41, and the seal engaging portion outer peripheral wall 33 b of the seal engaging portion groove portion 33 a is related to the filler pipe tip concave portion 42. A ring-shaped seal engaging portion projection ridge 33c can be formed. In this case, the sealing performance between the outer peripheral surface of the filler pipe distal end portion 41 and the seal engaging portion groove 33a can be improved.

The seal member 30 can be formed of synthetic rubber. As the synthetic rubber, a material having excellent oil resistance can be selected. For example, NBR (acrylonitrile butadiene rubber) can be used. Further, different materials can be used for the inner layer and the outer layer.
When synthetic rubber is used, the elasticity is excellent and the assembling and detaching of the filler pipe tip portion 41 is facilitated. After the assembly, the filler pipe attaching member 20 and the filler pipe tip portion 41 come into close contact with each other to provide a sealing property. Can be improved.

Next, a method for attaching the filler pipe tip 41 to the filler pipe attachment member 20 will be described with reference to FIGS.
First, the filler pipe mounting member 20 is mounted on the pipe mounting portion 10 of the tank outer wall 2 of the fuel tank 1. The mounting flange portion 23 of the filler pipe mounting member 20 is welded to the mounting member holding flange 12 of the pipe mounting portion 10.

As shown in FIG. 1, when the mounting flange portion tip portion 24 extending downward is formed on the mounting flange portion 23, the mounting flange portion tip portion 24 is melted and welded to the mounting member holding flange 12. Can be. In this case, the mounting flange portion distal end portion 24 is reliably welded to the mounting member holding flange 12 of the tank outer wall 2, and the adhesion can be improved.

Next, as shown in FIG. 2, the filler pipe tip 41 of the filler pipe 40 is inserted into the seal engagement groove 33a of the seal engagement part 33 of the seal member 30.
Thereafter, as shown in FIG. 3, the filler pipe distal end portion 41 and the seal member 30 are inserted together into the filler pipe mounting tubular portion 21 of the filler pipe mounting member 20.

At this time, as shown in the arrow of FIG. 3, the seal tubular portion 31 of the seal member 30 can be bent so as to be in close contact with the inner surface of the filler pipe distal end portion 41 as shown in FIG. . Further, since the seal member inclined surface 34 is provided, friction and interference with the seal tubular portion 31 at the time of insertion to the seal member inclined surface 34 are small, and insertion is easy. Even at the seal member inclined surface 34, the insertion friction when the tip of the filler pipe mounting tubular portion 21 is inserted can be reduced.
Further, as shown in FIG. 4, when the filler pipe tip 41 is inserted, the seal engaging portion 33 comes into close contact with the mounting flange upper surface 23 a of the filler pipe mounting member 20.

  At this time, when the filler pipe attachment tubular portion ridge 21a is provided on the filler pipe attachment member 20, the filler pipe attachment tubular portion ridge 21a is pressed by the seal tubular portion 31 to improve the sealing property. it can. In the case where the seal tubular portion 31 is provided with the seal tubular portion thick portion 31a, the filler pipe mounting tubular portion protruding ridge portion 21a further cuts into the seal tubular portion thick portion 31a to further improve the sealing performance. Can be done.

In addition, as shown in FIG. 1, when the filler pipe tip protrusion 43 is provided, the filler pipe tip protrusion 43 comes into contact with the inner surface of the seal engaging portion outer peripheral wall 33b to improve the sealing performance. it can. Further, as shown in FIG. 2, even when the seal engagement portion projection 33c is fitted into the filler pipe tip concave portion 42, the sealing performance can be further improved.

Furthermore, after inserting the filler pipe tip 41, the pipe band 60 can be fastened to the outer peripheral surface of the filler pipe tip 41 as shown in FIG. In this case, the filler pipe tip portion 41 can be firmly attached to the filler pipe attachment member 20, and the seal member 30 can be strongly sandwiched to improve the sealing performance. Also, if the pipe band 60 is removed, the filler pipe tip 41 can be easily removed.

DESCRIPTION OF SYMBOLS 1 Fuel tank 2 Tank outer wall 20 Filler pipe mounting member 21 Filler pipe mounting cylindrical part 22 Tank inner cylindrical part 23 Mounting flange part 30 Seal member 31 Seal member cylindrical part 33 Seal engaging part 33a Seal engaging part groove part 40 Filler pipe 41 Filler pipe tip 60 pipe band

Claims (7)

In a pipe mounting structure to be mounted on a hollow member,
A pipe mounting member for mounting the pipe on the outer wall of the hollow member, inserting the pipe into the pipe mounting member, a pipe mounting structure for mounting the pipe,
The pipe mounting member includes a mounting flange portion mounted on an outer wall of the hollow member, a pipe mounting tube portion extending from an upper surface of the mounting flange portion and positioned outside the outer wall of the hollow member, and a mounting flange portion. A tank inner cylinder extending from the lower surface and located inside the hollow member,
A seal member is provided between the pipe attachment member and a pipe tip provided at the tip of the pipe and attached to the pipe attachment member, and the seal member is provided between the pipe attachment member and the filler pipe. A seal tubular portion located, having a seal engagement portion to engage with the pipe tip,
The seal engagement portion has a seal engagement portion groove formed in a groove shape on the outer periphery of the lower end of the seal tubular portion, and the pipe tip is inserted into the seal engagement portion groove,
Forming a pipe tip projection on the outer peripheral side of the pipe tip to abut the inner surface of the seal engagement groove,
A ring-shaped pipe tip recess is formed on the outer peripheral surface of the pipe tip, and a ring-shaped pipe tip recess of the pipe tip is engaged with the seal engagement groove of the seal engagement portion. Forming a seal engaging portion ridge,
A pipe wherein the seal tubular portion is sandwiched between the pipe tip and the pipe mounting tubular portion, and the pipe tip is held by the seal engagement portion, and the pipe is attached to the hollow member. Mounting structure. 2. The pipe mounting structure according to claim 1, wherein the pipe is a filler pipe for injecting fuel into the fuel tank. On the outer peripheral surface of the pipe mounting tube portion, a ring-shaped pipe mounting tube portion ridge that comes into contact with the inner surface of the seal tube portion of the seal member is formed, and the pipe mounting tube portion ridge is formed of the seal tube. The pipe mounting structure according to claim 1 , wherein the pipe is pressed against the shape. Claim that the wall thickness of the distal end side of the sealing tubular portion of the sealing member is formed thicker than the thickness of the side where the sealing engagement portion is provided, forms part of varying thickness on the inclined surface shape The pipe mounting structure according to any one of claims 1 to 3 . The pipe mounting structure according to any one of claims 1 to 4 , wherein the seal member is formed of synthetic rubber. The pipe mounting structure according to any one of claims 1 to 5 , wherein the pipe mounting member is formed of a synthetic resin or metal. The pipe mounting structure according to any one of claims 1 to 6 , wherein an outer peripheral surface of the pipe tip is fastened by a pipe band.

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