JP2020111098A - Filler pipe - Google Patents

Abstract

To secure continuity between a cylindrical body and a pipe body easily in a filler pipe formed by welding the cylindrical body to the pipe body.SOLUTION: A filler pipe 1 includes a pipe body 10 and a cylindrical body 30 welded to the pipe body 10. In the pipe body 10, only an outermost layer is formed by a conductive layer. The cylindrical body 30 is molded by a synthetic resin having conductivity. The tip side of the pipe body 10 is formed with a welded surface 16 extending in a direction intersecting with an axial direction of the pipe body 10. On the outermost layer of the pipe body 10, a continuity surface 18 is formed at a position different from the welded surface 16.SELECTED DRAWING: Figure 1

Description

The present invention relates to a filler pipe.

Conventionally, a filler pipe for injecting fuel from a fuel filler port of a vehicle body into a fuel tank is known. For example, the filler pipe (fuel supply device FS) of Patent Document 1 includes a pipe body (fuel pipes 40 and 50) and a tubular body (filler neck 20). The base end of the pipe body is connected to the fuel tank. The tubular body constitutes a fuel supply path together with the pipe body by fixing the base end portion to the tip end portion of the pipe body, and when the fuel cap attached to the tip end portion is removed, refueling with a fueling gun becomes possible.

This type of filler pipe requires a mechanism for grounding static electricity on the vehicle body side so that static electricity is not transmitted to a person who holds the fuel cap when opening and closing the fuel cap. Therefore, in the filler pipe of Patent Document 1, the tubular body is made of a conductive resin, and the outer layer of the pipe body is a conductive layer. Then, when the tubular body is fixed to the pipe body, an earth path from the tubular body to the pipe body is configured.

Japanese Patent No. 5321444

In the filler pipe of Patent Document 1, the pipe body and the cylindrical body are assembled by press fitting. However, when assembling by press fitting, it is necessary to seal so that liquid does not leak from the gap formed between the pipe body and the cylindrical body, so a sealing member is required, and replacement due to deterioration of the sealing member is also necessary. Becomes

Therefore, welding can be considered as a fixing method that does not require a seal member. However, in the case of welding, the conductive layer that constitutes the outer layer of the pipe body is melted, so the conductive layer becomes thin, and the electrical continuity between the tubular body and the conductive layer in the pipe body is not sufficiently ensured. The ground path from the body to the pipe body may not be constructed.

The present invention has been completed based on the above circumstances, and makes it easy to ensure electrical continuity between a tubular body and a pipe body in a filler pipe configured by welding a tubular body and a pipe body. Is a problem to be solved.

The filler pipe according to the present invention,
A proximal end side is connected to the fuel tank, is composed of a plurality of layers including a non-conductive layer, at least the outermost layer is a synthetic resin pipe body composed of a conductive layer,
A cylindrical body made of synthetic resin, which has conductivity, a base end side of which is welded to a tip end side of the pipe body, and an opening portion into which a nozzle of an oil supply gun is inserted is formed on the tip end side,
A welding surface formed on the tip side of the pipe body and extending in a direction intersecting the axial direction of the pipe body;
In the outermost layer of the pipe body, a conduction surface formed at a position different from the welding surface,
It is characterized by having.

In the filler pipe of the present invention, the conducting surface is formed in the pipe body at a position different from the welding surface. Therefore, by welding the tubular body and the pipe body in a state where a part of the tubular body is in contact with the conducting surface of the pipe body, the tubular body and the pipe body can be electrically conducted via the conducting surface. For this reason, it becomes easy to ensure electrical continuity between the tubular body and the pipe body.

FIG. 3 is a cross-sectional view showing a state in which the pipe body and the tubular body of the filler pipe of Example 1 are welded together. FIG. 7 is a cross-sectional view showing a state in which the pipe body and the tubular body of the filler pipe of Example 2 are welded together. (A) is an explanatory view showing a state where the tubular body of Example 3 is heated, and (B) shows a state in which the pipe body and the tubular body in the filler pipe of Example 3 are welded. FIG. (A) is an explanatory view showing a state where the tubular body of Example 4 is heated, and (B) shows a state in which the pipe body and the tubular body in the filler pipe of Example 4 are welded. FIG.

The conducting surface of the present invention may be formed on an outer peripheral surface of the pipe body. According to this configuration, the diameter of the pipe body can be reduced as compared with the case where the conducting surface is formed on the tip surface of the pipe body.

The present invention may include a welded portion and a conductive contact portion. The welding portion may be formed on the tubular body and welded to the welding surface of the pipe body. The conductive contact portion is formed on the tubular body, and when the welded portion is welded to the welded surface of the pipe body, the conductive contact portion is arranged to be in contact with the conductive surface of the pipe body. Good. According to this configuration, when the tubular body is welded to the pipe body, the welding portion can be welded to the welding surface, and at the same time, the conductive contact portion can be brought into contact with the conduction surface, so that the work can be performed efficiently. it can.

The conductive contact portion of the tubular body of the present invention may be in elastically deformed contact with the conductive surface when the welded portion is welded to the welded surface of the pipe body. According to this configuration, in the state where the tubular body is welded to the pipe body, the elastic restoring force of the conductive contact portion of the tubular body acts so as to press the conductive contact portion against the conducting surface side of the pipe body, so that the tubular body The conductivity with the pipe body can be ensured more reliably.

In the present invention, the outer peripheral surface of the pipe body may be formed with a taper surface whose diameter decreases toward the tip end side, and the conduction surface may be formed on the taper surface. According to this configuration, when the tubular body is moved along the axial direction of the pipe main body and is welded to the pipe main body, the conductive contact portion makes sliding contact with the tapered conductive surface, so that the tubular body moves toward the pipe main body side. The amount of elastic deformation of the conductive contact portion increases as it moves. Therefore, the tubular body and the pipe main body contact each other more reliably, and the electrical continuity between the tubular body and the pipe main body can be more surely ensured.

In the present invention, the welding part may be welded to the pipe body in a state where at least a part of the conductive contact part is heated and melted. According to this configuration, when the tubular body is welded to the pipe body, the molten conductive contact portion is brought into contact with the weld surface of the pipe body, so that the conductive contact portion is deformed into a shape along the weld surface. Therefore, it is easy to absorb the dimensional error of the conductive contact portion and bring the conductive contact portion into contact with the conductive surface of the pipe body.

The melted conductive contact portion may be bent at the melted portion and brought into contact with the conductive surface. According to this configuration, since the molten portion of the conductive contact portion is bent and abuts on the conductive surface, it is possible to cope with a larger dimensional error.

The heated surface of the welded portion may be flush with the heated surface of the conductive contact portion. According to this configuration, since the welded portion and the conductive contact portion can be simultaneously heated by the flat plate-shaped heat source, the welded portion and the conductive contact portion can be simultaneously melted without complicating the configuration of the heat source.

<Example 1>
A first embodiment embodying the present invention will be described below with reference to FIG. The filler pipe 1 of this embodiment is used as an injection path when injecting fuel into a fuel tank (not shown) of an automobile. In the filler pipe 1, the fuel tank side (lower side in FIG. 1) is the base end side, and the opposite side (upper side in FIG. 1) is the front end side. Further, the direction of the filler pipe 1 on the fuel tank side is the depth direction, and the opposite direction is the front direction.

The filler pipe 1 includes a pipe body 10, a tubular body 30, and a nozzle guide 60. The pipe body 10 has a pipe shape with both ends open, and the base end side is connected to a fuel tank (not shown). The pipe body 10 is made of synthetic resin. The pipe body 10 is composed of a plurality of layers including a non-conductive layer, and at least the outermost layer 12 (only the outermost layer 12 in this embodiment) is a conductive layer (a layer made of conductive polyethylene in this embodiment). The pipe body 10 is formed by blow molding, for example.

A protruding portion 14 is formed at a position near the tip of the pipe body 10 so as to extend radially outward of the pipe body 10 in an annular shape. The tip end surface of the overhanging portion 14 functions as a welding surface 16 extending in a direction intersecting (orthogonal in the present embodiment) the axial direction of the pipe body 10. The outer peripheral surface of the overhanging portion 14 is continuous with the tip end surface of the overhanging portion 14, and functions as a conducting surface 18 extending along the axial direction of the pipe body 10. That is, the conducting surface 18 is formed on the outer peripheral surface of the pipe body 10.

Since the welding surface 16 is formed on a surface extending in a direction intersecting the axial direction of the pipe body 10, the welding surface 16 is likely to expand during blow molding of the pipe body 10 to thin the conductive layer. On the other hand, since the conductive surface 18 is formed on the surface extending along the axial direction of the pipe body 10, it is difficult for the conductive body 18 to expand during blow molding of the pipe body 10 and the conductive layer is not easily thinned.

The tubular body 30 is made of conductive synthetic resin and has a tubular shape with both ends open. The base end side of the tubular body 30 is welded to the tip end side of the pipe body 10, and a nozzle of an oil supply gun (not shown) is inserted through the opening 31 on the tip end side. A female screw-shaped cap mounting portion 32 to which a fuel cap (not shown) is mounted is formed on the inner peripheral surface on the front end side of the tubular body 30.

The tubular body 30 includes a tubular main body portion 34, a welding portion 36, and a conductive contact portion 38. The tube main body 34 has a tubular shape and constitutes substantially the entire tubular body 30. The welded portion 36 is a portion welded to the welded surface 16 of the pipe body 10. The welded portion 36 has a shape projecting inward from the base end portion of the cylinder main body 34, and has an annular shape coaxial with the cylinder main body 34. The inner diameter of the welded portion 36 is formed to be larger than the outer diameter of the tip portion of the pipe body 10, and the outer diameter of the welded portion 36 is the same as the outer diameter of the overhanging portion 14 or larger than the outer diameter of the overhanging portion 14. Is also small.

The conductive contact portion 38 is a portion that is arranged in contact with the conducting surface 18 of the pipe body 10 when the welding portion 36 is welded to the welding surface 16 of the pipe body 10. At least one conductive contact portion 38 is provided, and more specifically, a plurality of conductive contact portions 38 are provided along the circumferential direction of the cylinder main body portion 34.

Each conductive contact portion 38 has a first shaft portion 38A, a second shaft portion 38B, and a contact portion 38C. The first shaft portion 38</b>A projects from the outer peripheral surface of the cylinder body portion 34 radially outward of the cylinder body portion 34. The second shaft portion 38B extends in the depth direction from the tip end portion of the first shaft portion 38A, and projects in the depth direction from the protruding end surface of the welding portion 36. The contact portion 38C projects inward in the radial direction of the tubular body 30 from the tip end portion of the second shaft portion 38B. The contact portion 38C is formed with a pressing surface 38D whose distance from the axis of the tubular body 30 increases as it goes from the distal end side to the proximal end side of the tubular body 30.

The tubular body 30 has a mounting member 40 to which a fuel cap is mounted, and a welding member 42 that is welded to the pipe body 10. The tubular body 30 is configured by integrally forming a mounting member 40 and a welding member 42 by two-color molding and in a conductive manner. The attachment member 40 is made of a material different from that of the outermost layer 12 (conductive layer) of the pipe body 10, and is made of, for example, a conductive resin containing glass fiber reinforced polyamide. The welding member 42 is made of the same material as the outermost layer 12 (conductive layer) of the pipe body 10, and is made of, for example, conductive polyethylene. The above-mentioned cap attachment portion 32 is formed on the attachment member 40, and the above-mentioned welding portion 36 and conductive contact portion 38 are formed on the welding member 42.

The nozzle guide 60 described above is housed inside the tip side of the pipe body 10 and fixed to the pipe body 10. The nozzle guide 60 is made of a metal material, a synthetic resin (polyacetylene in this embodiment), or the like, and has a tubular shape. The nozzle guide 60 is attached to the inner tip of the pipe body 10 and regulates the direction of the nozzle of the fuel gun inserted from the opening 31 of the tubular body 30.

Next, a process of welding the tubular body 30 to the pipe body 10 will be described. When welding, a heat source (not shown) is used to melt the welding surface 16 of the pipe body 10 and the welding portion 36 of the tubular body 30. Then, from the state where the welding portion 36 and the welding surface 16 face each other in the axial direction, the tubular body 30 is moved to the pipe body 10 side along the axis of the pipe body 10, and the welding portion 36 is welded to the welding surface 16. ..

When the tubular body 30 moves to the pipe body 10 side, the conductive contact portion 38 is elastically deformed by the pressing surface 38D being pushed by the projecting portion 14 of the pipe body 10. When the conductive contact portion 38 is welded to the weld surface 16 of the pipe body 10, the conductive contact portion 38 contacts the conductive surface 18 in an elastically deformed state.

Next, the effect of the filler pipe 1 of Example 1 will be described.
In the filler pipe 1 of Example 1, the conducting surface 18 is formed in the pipe body 10 at a position different from the welding surface 16. Therefore, by welding the tubular body 30 and the pipe body 10 with a part of the tubular body 30 in contact with the conducting surface 18 of the pipe body 10, the tubular body 30 and the pipe body 10 are connected via the conducting surface 18. Can be conducted. Therefore, it becomes easy to ensure the electrical continuity between the tubular body 30 and the pipe body 10.

Further, in the filler pipe 1, the conducting surface 18 is formed on the outer peripheral surface of the pipe body 10. Therefore, the diameter dimension of the pipe body 10 can be suppressed smaller than that in the case where the conducting surface 18 is formed on the tip surface of the pipe body 10.

Further, in the filler pipe 1, a conductive contact portion 38 is provided in the tubular body 30 in addition to the welding portion 36. Therefore, when the tubular body 30 is welded to the pipe body 10, the welded portion 36 can be welded to the welded surface 16 and, at the same time, the conductive contact portion 38 can be brought into contact with the conductive surface 18, so that the work is efficiently performed. be able to.

Further, in this filler pipe 1, in the state where the tubular body 30 is welded to the pipe body 10, the elastic restoring force of the conductive contact portion 38 of the tubular body 30 presses the conductive contact portion 38 toward the conducting surface 18 side of the pipe body 10. As described above, the electrical continuity between the tubular body 30 and the pipe body 10 can be ensured more reliably.

<Example 2>
The filler pipe 201 of the second embodiment is different from the filler pipe 1 of the first embodiment in that the outer peripheral surface (conduction surface 218) of the overhanging portion 214 is formed in a tapered shape, and other configurations are the same. In the description of the second embodiment, the same components as those of the filler pipe 1 of the first embodiment are designated by the same reference numerals and the description thereof will be omitted.

As shown in FIG. 2, the filler pipe 201 of the second embodiment includes a pipe body 210, a tubular body 30, and a nozzle guide 60. In the pipe body 210, an overhanging portion 214 is formed instead of the overhanging portion 14 in the filler pipe 1 of the first embodiment. A welding surface 16 and a conducting surface 218 are formed on the overhanging portion 214. A taper surface is formed on the outer peripheral surface of the overhanging portion 214, the diameter of which decreases toward the tip side, and the conduction surface 218 is formed on the taper surface.

In this filler pipe 201, when the tubular body 30 is welded to the pipe body 210 while moving along the axial direction of the pipe body 210, the contact portion 38C of the conductive contact portion 38 slides on the tapered conductive surface 218. Therefore, the elastic deformation amount of the conductive contact portion 38 increases as the tubular body 30 moves toward the pipe body 210. For this reason, the tubular body 30 and the pipe main body 210 contact each other more reliably, and the electrical continuity between the tubular body 30 and the pipe main body 210 can be more reliably ensured.

<Example 3>
The filler pipe 301 of the third embodiment is different in the form of the conductive contact portion 338 from the form of the conductive contact portion 38 of the filler pipe 1 of the first embodiment, and is otherwise the same in configuration. In the description of the third embodiment, the same components as those of the filler pipe 1 of the first embodiment are designated by the same reference numerals and the description thereof will be omitted.

As shown in FIG. 3, the filler pipe 301 according to the third exemplary embodiment includes the pipe body 10, the cylindrical body 330, and the nozzle guide 60. The tubular body 330 has a tubular body portion 34, a welding portion 36, and a conductive contact portion 338. The conductive contact portion 338 is in the form of a cantilever protruding from the outer peripheral surface of the cylinder body portion 34 to the outside in the radial direction of the cylinder body portion 34 and extending in a rod shape.

When the tubular body 330 is welded to the pipe body 10, as shown in FIG. 3A, the heat source 370 heats the welded portion 36 and the conductive contact portion 338 at the same time. The cylindrical body 330 heated by the heat source 370 and melted moves along the axial direction of the pipe body 10 and is welded to the welding surface 16 of the pipe body 10. Then, as shown in FIG. 3B, the molten conductive contact portion 338 is bent and abuts on the conductive surface 18.

As described above, in the filler pipe 301, the welding portion 36 is welded to the welding surface 16 of the pipe body 10 in a state where at least a part of the conductive contact portion 338 is heated and melted. According to this configuration, when the tubular body 330 is welded to the pipe body 10, the molten conductive contact portion 338 is brought into contact with the weld surface 16 of the pipe body 10, so that the conductive contact portion 338 is guided along the weld surface 16. It transforms into a curved shape. Therefore, it is easy to absorb the dimensional error of the conductive contact portion 338 and bring the conductive contact portion 338 into contact with the conductive surface 18 of the pipe body 10.

Further, in this filler pipe 301, the molten portion of the conductive contact portion 338 is bent and abuts against the conductive surface 18, so that a larger dimensional error can be dealt with.

<Example 4>
The filler pipe 401 of the fourth embodiment is different from the filler pipe 1 of the first embodiment in that the heated surfaces of the welding portion 36 and the conductive contact portion 438 are flush with each other, and the other configurations are the same. In the description of the fourth embodiment, the same components as those of the filler pipe 1 of the first embodiment are designated by the same reference numerals and the description thereof will be omitted.

As illustrated in FIG. 4, the filler pipe 401 according to the fourth embodiment includes the pipe body 10, a tubular body 430, and the nozzle guide 60. The tubular body 430 includes a tubular body portion 34, a welding portion 36, and a conductive contact portion 438. The conductive contact portion 438 has a form protruding radially outward from the outer peripheral surface of the welding portion 36 over the entire circumference, and the surface to be heated (the surface on the pipe body 10 side) is heated to the welding portion 36. It is flush with the surface.

When the tubular body 430 is welded to the pipe body 10, the welded portion 36 and the conductive contact portion 438 of the tubular body 430 are heated by a flat plate-shaped heat source 470 as shown in FIG. , The entire area of the proximal surface is heated at the same time. Then, as shown in FIG. 4B, a part of the conductive contact portion 438 is projected outward in the radial direction with respect to the outer peripheral surface of the overhanging portion 14, so that the tubular body 430 is moved in the axial direction of the pipe body 10. Move along. Then, after the welded portion 36 contacts the welded surface 16, the tubular body 430 is further pushed in the axial direction of the pipe body 10 so that the protruding portion of the conductive contact portion 438 conducts (the outer peripheral surface of the protruding portion 14). Move along surface 18. When the protruding portion of the conductive contact portion 438 has advanced to a certain extent and the movement of the tubular body 430 is stopped, the welded portion 36 is welded to the welded surface 16, and the protruding outer peripheral portion of the conductive contact portion 438 is the conductive surface. 18 is in contact with.

As described above, in this filler pipe 401, the heated surface of the welded portion 36 and the heated surface of the conductive contact portion 438 are flush with each other. According to this configuration, since the welded portion 36 and the conductive contact portion 438 can be simultaneously heated by the flat heat source 470, the welded portion 36 and the conductive contact portion 438 are simultaneously melted without complicating the configuration of the heat source 470. Can be made.

<Other Examples>
The present invention is not limited to the embodiments described by the above description and the drawings, and the following embodiments are also included in the technical scope of the present invention.
(1) In the first to fourth embodiments described above, the tubular body 30 is formed by two-color molding, but it may not be formed by two-color molding. For example, you may shape with one type of resin.
(2) In the first to fourth embodiments described above, the conducting surfaces 18 and 218 are formed on the outer peripheral surface of the overhanging portions 14 and 214 (pipe body 10 and 210), but they may be formed on other surfaces. .. For example, it may be formed on the same surface as the welding surface 16.

1, 201, 301, 401... Filler pipe 10, 210... Pipe body 12... Outermost layer 16... Welding surface 18, 218... Conductive surface 30... Cylindrical body 31... Opening portion 36... Welding portion 38... Conductive contact portion

Claims (8)

A proximal end side is connected to the fuel tank, is composed of a plurality of layers including a non-conductive layer, at least the outermost layer is a synthetic resin pipe body composed of a conductive layer,
A cylindrical body made of synthetic resin, which has conductivity, a base end side of which is welded to a tip end side of the pipe body, and an opening portion into which a nozzle of an oil supply gun is inserted is formed on the tip end side,
A welding surface formed on the tip side of the pipe body and extending in a direction intersecting the axial direction of the pipe body;
In the outermost layer of the pipe body, a conduction surface formed at a position different from the welding surface,
Filler pipe characterized by having. The filler pipe according to claim 1, wherein the conductive surface is formed on an outer peripheral surface of the pipe body. A welding portion formed on the tubular body and welded to the welding surface of the pipe body;
A conductive contact portion which is formed on the cylindrical body and is arranged in contact with the conductive surface of the pipe body when the welded portion is welded to the weld surface of the pipe body. The filler pipe according to claim 1 or 2. The conductive contact portion of the tubular body is in elastically deformed contact with the conductive surface when the welded portion is welded to the welded surface of the pipe body. Filler pipe as described. The filler pipe according to claim 4, wherein the outer peripheral surface of the pipe body is formed with a taper surface whose diameter decreases toward the tip side, and the conduction surface is formed on the taper surface. .. The filler according to any one of claims 3 to 5, wherein the welded portion is welded to the pipe body in a state where at least a part of the conductive contact portion is heated and melted. pipe. The filler pipe according to claim 6, wherein the melted conductive contact portion is bent at the melted portion and abuts on the conductive surface. The filler pipe according to claim 3, wherein the heated surface of the welded portion and the heated surface of the conductive contact portion are flush with each other.

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