JP2016028911A - Breather tube mount structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a breather tube mount structure that is facilitated in connecting an in-tank breather tube and enables visual confirmation of a connection work.SOLUTION: In the breather tube mount structure that is mounted to a fuel tank 1, the breather tube includes: an in-tank breather tube 10; an out-tank breather tube 40; and a breather tube connection member 51. The in-tank breather tube 10 is mounted inside the fuel tank 1 by a clamp 30. A rib is formed at two parts separated apart from each other at a predetermined length at an exterior surface of the in-tank breather tube 10, thus the in-tank breather tube is mounted by the clamp 30 so as to be slidable between the two ribs.SELECTED DRAWING: Figure 3

Description

The present invention relates to a structure for attaching a breather tube attached to a fuel tank. In particular, it relates to a breather tube mounted in a fuel tank.

  As shown in FIG. 9, a filler pipe 160 is connected to a fuel tank 1 of an automobile by a filler pipe attachment portion 153 formed in the fuel tank 1 and a filler pipe connecting member 152. Fuel is injected into the fuel tank 1 through the filler pipe 160 from the fuel filler port of the vehicle body.

A breather tube is attached to the fuel tank 1 and the filler pipe 160 to discharge the gas in the fuel tank 1 to the outside of the fuel tank 1. The breather tube is attached to the outside of the fuel tank 1 and connected to the filler pipe 160 in the vicinity of the inlet, the in-tank breather tube 110 attached to the fuel tank 1, and the out-of-tank breather tube 140. And a breather tube connecting member 151 for connecting the in-tank breather tube 110 (see, for example, Patent Document 1).

  In this case, as shown in FIG. 10, the fuel tank 1 is formed by welding a tank upper portion 2 and a tank lower portion 3 with a flange portion 7. At this time, the in-tank breather tube 110 is attached to the tank upper portion 2 by the clamp 130 before the flange portion 7 is welded. The breather tube connecting member 151 is attached to the inlet lower plate 150. When the breather tube connecting member 151 and the breather tube 110 in the tank are connected in advance and the inlet lower plate 150 is attached to the tank upper portion 2, When welding the flange part 7 of the tank upper part 2 and the tank lower part 3, the welding machine 9 and the breather tube connection member 151 will interfere.

For this reason, the in-tank breather tube 110 and the breather tube connecting member 151 connected to each other are inserted from the pipe mounting hole 6 and inserted through the pump mounting hole 5, and the tip of the in-tank breather tube 110 is tanked by the clamp 130. It was fixed to the inner surface of the upper part 2. Alternatively, when the tip of the in-tank breather tube 110 attached to the tank upper part 2 and the breather tube connecting member 151 are connected, the tank upper part 2 and the tank lower part 3 of the fuel tank 1 are welded and then connected to the pipe attachment hole 6. I went by groping.
For this reason, the fixing work and the connection work cannot be visually confirmed.

JP 2012-224133 A

Accordingly, the present invention is intended to provide a breather tube mounting structure that allows easy connection of a breather tube in a tank and allows visual confirmation of the connection operation.

In order to solve the above problems, the present invention of claim 1 is directed to a breather tube mounting structure that is mounted on a fuel tank.
The breather tube has an in-tank breather tube attached inside the fuel tank, an out-tank breather tube attached outside the fuel tank, and a breather tube connecting member for connecting the in-tank breather tube and the out-tank breather tube.
The in-tank breather tube is attached to the fuel tank by a clamp and attached to the inside of the fuel tank. On the outer surface of the in-tank breather tube, ribs are formed at two locations separated by a predetermined length. The breather tube mounting structure is characterized in that it is slidably mounted between ribs by a clamp.

According to the first aspect of the present invention, in the mounting structure of the breather tube attached to the fuel tank, the breather tube includes an in-tank breather tube attached to the inside of the fuel tank, an out-tank breather tube attached to the outside of the fuel tank, and an inside of the tank. It has a breather tube connecting member for connecting the breather tube and the breather tube outside the tank.

For this reason, a breather tube can be divided | segmented and attached, and the breather tube in a tank can be extended to the position which can discharge | emit the gas in a fuel tank reliably. The breather tube outside the tank is connected to the inlet of the filler pipe, extends to the fuel tank, and can be connected to the breather tube in the tank by the breather tube connecting member. Can be discharged.

The in-tank breather tube is attached to the fuel tank by a clamp and attached to the fuel tank. For this reason, the breather tube in the tank can be securely attached in advance to a predetermined position inside the fuel tank.

On the outer surface of the in-tank breather tube, ribs were formed at two locations separated by a predetermined length, and slidably attached by clamps between the two ribs. For this reason, even after the in-tank breather tube is mounted in the fuel tank, it can slide, and the tip of the in-tank breather tube can be easily connected to the breather tube connecting member.

Furthermore, the sliding range of the breather tube in the tank can be regulated by the ribs formed at two locations separated by a predetermined length, which is necessary when the tip of the breather tube in the tank is connected to the breather tube connecting member. The tip of the in-tank breather tube can be slid to the position, and the in-tank breather tube does not come off the clamp.

According to the second aspect of the present invention, when the breather tube in the tank attached to the clamp slides in the outer direction of the fuel tank, the tip of the breather tube can jump out of the fuel tank from the opening of the fuel tank. It is a mounting structure.

In the present invention of claim 2, when the in-tank breather tube attached to the clamp is slid in the outer direction of the fuel tank, the tip can be protruded from the opening of the fuel tank to the outside of the fuel tank. For this reason, when connecting the breather tube connecting member and the tip of the breather tube in the tank, it can be connected outside the fuel tank, the connection work can be visually confirmed, and the connection work can be performed reliably, Easy connection work,

According to a third aspect of the present invention, the breather tube in the tank is a structure for attaching the breather tube attached to a built-in component attached in the fuel tank by a clamp.

In the third aspect of the present invention, since the breather tube in the tank is attached to the built-in component attached to the fuel tank by the clamp, the breather tube in the tank can be attached together by attaching the built-in component to the fuel tank. The operation is easy and there is no need to separately provide a mounting portion for attaching the clamp in the fuel tank.

According to a fourth aspect of the present invention, there is provided a breather tube mounting structure in which the built-in component is a separator.

In the present invention of claim 4, since the built-in component is a separator, the separator, which is a large component, is stably mounted in the fuel tank, and the breather tube in the tank is stably held at a predetermined position in the fuel tank. be able to.

According to a fifth aspect of the present invention, there is provided a breather tube attachment structure in which the breather tube connecting member is attached to an inlet lower plate that closes the opening of the fuel tank.

In the present invention of claim 5, since the breather tube connecting member is attached to the inlet lower plate that closes the opening of the fuel tank, the inlet lower plate is attached to the fuel tank and the breather tube connecting member is securely held in the fuel tank. can do.

The present invention according to claim 6 is the breather tube mounting structure in which the breather tube in the tank is made of metal and the breather tube connecting member is made of rubber.

In the present invention of claim 6, since the in-tank breather tube is made of metal, it has high rigidity and excellent durability.
Since the breather tube connecting member is made of rubber, it is easy to connect the breather tube in the tank and the breather tube outside the tank, and vibrations of the vehicle body can be absorbed by the breather tube connecting member.

On the outer surface of the breather tube in the tank, ribs are formed at two locations separated by a predetermined length, and are slidably attached by clamps between the two ribs, so that the tip of the breather tube in the tank is connected to the breather tube When connecting to the member, the breather tube in the tank can slide, and the connection is easy. Furthermore, the sliding range of the breather tube in the tank can be regulated by the ribs formed at two locations separated by a predetermined length, which is necessary when the tip of the breather tube in the tank is connected to the breather tube connecting member. The tip of the in-tank breather tube can be slid to the position, and the in-tank breather tube does not come off the clamp.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 illustrates an embodiment of the present invention, and is a perspective view of a fuel tank to which a breather tube of the present invention is attached as viewed obliquely from above. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 shows an embodiment of the present invention, and is an enlarged perspective view of a pipe attachment hole portion of a fuel tank to which a breather tube of the present invention is attached. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 shows an embodiment of the present invention and is a cross-sectional view of a fuel tank to which a breather tube of the present invention is attached. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 shows an embodiment of the present invention, and is a perspective view of an inlet lower plate and a breather tube connecting member used in the present invention as viewed from obliquely above. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 shows an embodiment of the present invention, and is a perspective view seen obliquely from above in a state where a breather tube in a tank is attached to a separator used in the present invention. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 illustrates an embodiment of the present invention, and is a perspective view of a separator used in the present invention as viewed obliquely from above. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 shows an embodiment of the present invention, and is a perspective view of a breather tube in a tank used in the present invention as viewed obliquely from above. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 shows an embodiment of the present invention and is a front view of a clamp used in the present invention. It is sectional drawing of the conventional breather tube, a filler pipe, and a fuel tank. It is sectional drawing of the fuel tank to which the conventional breather tube in a tank was attached.

The present invention relates to a structure for attaching a breather tube attached to a fuel tank 1, and an embodiment thereof will be described with reference to FIGS.
The fuel tank 1 used in the embodiment of the present invention is made of metal. As shown in FIGS. 1 to 3, the fuel tank 1 is composed of a tank upper part 2 and a tank lower part 3. The tank lower part 3 is integrally joined by welding at a flange part 7 which is an outer peripheral part thereof.

The tank upper portion 2 and the tank lower portion 3 may be formed of synthetic resin by injection molding or the like, and then the flange portion 7 may be fused.
As shown in FIG. 3, a sub tank 4 is attached to a lower portion of the tank 3 at a lower portion of the pump attachment hole 5, and a fuel pump (not shown) and the like are attached.

  As shown in FIG. 1, a pump mounting hole 5 for mounting a fuel pump and the like and a pipe mounting hole 6 for mounting an inlet lower plate 50 described later are formed in the tank upper portion 2 of the fuel tank 1. As shown in FIG. 2, the pipe mounting hole 6 is formed in a portion close to the flange portion 7 at the end of the tank upper portion 2, and the tip of the in-tank breather tube 10 described later is connected to the outside of the fuel tank 1 from the pipe mounting hole 6. It is formed so that it can be taken out. The pipe mounting hole 6 can be closed by an inlet lower plate 50 described later.

  As shown in FIG. 3, a breather tube is attached to the fuel tank 1. The breather tube includes an in-tank breather tube 10 attached to the inside of the fuel tank 1, an outside tank breather tube 40 attached to the outside of the fuel tank 1, and a breather tube connecting member for connecting the in-tank breather tube 10 and the outside tank breather tube 40. 51. In addition, a filler pipe (not shown) for injecting fuel from a fuel filler port of the vehicle body is attached to the fuel tank 1.

One end of the tank outer breather tube 40 is attached to the inlet portion of the filler pipe, and the other end is connected to the breather tube connecting member 51. The breather tube connecting member 51 is connected to the in-tank breather tube 10 in the fuel tank 1. Therefore, the breather tube can discharge the gas in the fuel tank 1 to the vicinity of the filler pipe inlet and the vehicle body fuel filler opening.

The in-tank breather tube 10 is attached in the fuel tank 1 by a clamp 30 to a separator 20 attached in the fuel tank 1. For this reason, the in-tank breather tube 10 can be securely attached to a predetermined position inside the fuel tank 1 in advance. The separator 20 and the clamp 30 will be described later.

The in-tank breather tube 10 of the present embodiment can be made of metal, for example, stainless steel or iron and having a surface plated. In the case of a metal, it has high rigidity and excellent durability. The in-tank breather tube 10 can also be formed of a hard synthetic resin.

As shown in FIG. 7, the in-tank breather tube 10 is connected to the connecting portion 11 on the side to be connected to the breather tube connecting member 51 and the outer surface in the vicinity of the tip portion 12 of the fuel tank 1. Ribs 14 are formed. The connection side rib 13 and the tip side rib 14 can be formed by attaching a ring-shaped member to the in-tank breather tube 10. The connection-side rib 13 and the tip-side rib 14 are formed apart from each other by a predetermined length. The in-tank breather tube 10 is slidably attached by a clamp 30 between the connection side rib 13 and the tip side rib 14.

Next, the inlet lower plate 50 will be described with reference to FIG. The inlet lower plate 50 is attached so as to close the pipe attachment hole 6. In the embodiment of the present invention, the inlet lower plate 50 has a breather tube connecting member 51 and a filler pipe connecting member 52 attached thereto. The filler pipe connecting member 52 is connected to the tip of the filler pipe and injects fuel into the fuel tank 1. The filler pipe connecting member 52 may be attached to another plate instead of being attached to the same inlet lower plate 50 as the breather tube connecting member 51 and attached to another opening of the fuel tank 1.

The breather tube connecting member 51 is preferably made of rubber. In this case, when the in-tank breather tube 10 and the out-of-tank breather tube 40 are connected, it is easily bent so that the connecting work is easy. It can be absorbed by the member 51.

Next, the separator 20 will be described with reference to FIG.
The separator 20 is attached to the inside of the tank upper portion 2, and a plurality of separator wall 25 extends downward from the separator main body 21 to reduce the generation of fuel flow noise in the fuel tank 1. A tube mounting groove 22 for attaching the in-tank breather tube 10 is formed in the separator body 21. The tube mounting groove 22 is formed with a clamp mounting hole 23 for mounting a clamp 30 described later. The in-tank breather tube 10 can be stably held at a predetermined position by the tube mounting groove 22.

A plurality of separator mounting claws 24 are formed in the separator body 21. When the separator 20 is attached to the inner surface of the tank upper part 2, the separator attachment claw 24 can be engaged with the tank upper part 2 to stably attach the separator 20.
In this embodiment, the in-tank breather tube 10 is attached to the separator 20 as a built-in component, but it can also be attached to another built-in component to be installed in the fuel tank 1.

As shown in FIG. 8, the clamp 30 includes a clamp leg portion 31 that is inserted into the clamp attachment hole 23 and attaches the clamp 30 to the separator 20, and a clamp head portion 32 that holds the in-tank breather tube 10. The clamp leg 31 has a shape that extends obliquely upward from the lower end. When the clamp leg 31 is inserted into the clamp attachment hole 23, the clamp leg 31 can be bent and easily inserted.

The clamp head 32 has a tube holding recess 33 for holding the in-tank breather tube 10 and a tube cover part 34 for closing the tube holding recess 33 after holding the in-tank breather tube 10. A tube cover locking portion 35 that locks the tube cover portion 34 when the tube holding recess 33 is closed is formed. When the in-tank breather tube 10 is held by the clamp head 32, the in-tank breather tube 10 holds the tube holding recess 33 slidably.

Next, a connection operation between the in-tank breather tube 10 and the breather tube connecting member 51 will be described.
First, the clamp leg 31 of the clamp 30 is inserted into the clamp attachment hole 23 of the separator 20, and the clamp 30 is attached to the tube attachment groove 22 of the separator 20.

Thereafter, the in-tank breather tube 10 is attached to the separator 20. That is, the portion between the connecting rib 13 and the tip rib 14 of the breather tube 10 in the tank is attached to the tube holding recess 33 of the clamp 30, the tube cover 34 is closed, and the tube cover locking portion 35 is fitted. Attach the breather tube 10 in the tank. At this time, the in-tank breather tube 10 can slide in the tube holding recess 33 between the connection side rib 13 and the tip side rib 14.

Next, a separator 20 is attached to the tank upper part 2 together with the in-tank breather tube 10, and the tank upper part 2 of the fuel tank 1 and the flange part 7 of the tank lower part 3 to which the in-tank breather tube 10 is attached are welded. Create Thereafter, as shown in FIG. 2, a tool is inserted from the pipe mounting hole 6 of the fuel tank 1, and the tip of the in-tank breather tube 10 is pulled out of the fuel tank 1.

At this time, since the in-tank breather tube 10 is slidably attached to the clamp 30, it can be easily pulled out by inserting a tool from the pipe attachment hole 6. And since the front side rib 14 is formed in the in-tank breather tube 10, only a predetermined | prescribed extraction | drawer dimension can be pulled out and the in-tank breather tube 10 does not remove | deviate from the clamp 30. FIG. Further, since the connection-side rib 13 is formed, the in-tank breather tube 10 is not detached from the clamp 30 before the in-tank breather tube 10 and the breather tube coupling member 51 are coupled.

The leading end of the drawn breather tube 10 in the tank and the breather tube connecting member 51 attached to the inlet lower plate 50 are connected outside the fuel tank 1. At this time, the rotational direction of the in-tank breather tube 10 can be regulated by matching the mark on the in-tank breather tube 10 with the mark on the breather tube connecting member 51 attached to the inlet lower plate 50. The connection work can be performed outside the fuel tank 1, and it can be attached securely by visual confirmation.

After the connection, the inside of the clamp 30 is slid to push the in-tank breather tube 10 into the fuel tank 1. Thereafter, the inlet lower plate 50 is attached to the pipe attachment hole 6 of the fuel tank 1, and the pipe attachment hole 6 is closed with screws or the like. If it does so, the front-end | tip of the breather tube 10 in a tank can stop in the predetermined position in the fuel tank 1, and the gas in the fuel tank 1 can be discharged | emitted reliably.
Furthermore, the breather tube connecting member 51 can be attached by connecting the outer end of the fuel tank 1 and the breather tube 40 outside the tank.

DESCRIPTION OF SYMBOLS 1 Fuel tank 10 Breather tube in a tank 13 Connection side rib 14 Front end side rib 20 Separator 30 Clamp 40 Breather tube outside a tank 50 Inlet lower plate 51 Breather tube connection member

Claims (6)

In the mounting structure of the breather tube attached to the fuel tank,
The breather tube has an in-tank breather tube attached to the fuel tank, an out-tank breather tube attached to the outside of the fuel tank, and a breather tube connecting member for connecting the in-tank breather tube and the out-of-tank breather tube. And
The in-tank breather tube is attached to the fuel tank by a clamp and attached to the fuel tank, and ribs are formed on the outer surface of the in-tank breather tube at two predetermined distances. A breather tube mounting structure characterized by being slidably mounted between the two ribs by the clamp. 2. The breather tube in the tank attached to the clamp is capable of projecting a tip from the opening of the fuel tank to the outside of the fuel tank when slid in an outward direction of the fuel tank. Breather tube mounting structure. The breather tube mounting structure according to claim 1 or 2, wherein the in-tank breather tube is mounted to a built-in component mounted in the fuel tank by the clamp. The breather tube mounting structure according to claim 3, wherein the built-in component is a separator. The breather tube attachment structure according to any one of claims 1 to 4, wherein the breather tube connecting member is attached to an inlet lower plate that closes an opening of the fuel tank. The breather tube mounting structure according to any one of claims 1 to 5, wherein the in-tank breather tube is made of metal, and the breather tube connecting member is made of rubber.