JP2006183731A - Hose fastening structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a hose fastening structure capable of preventing damaging of appearance of a fuel tank caused by dropping of fuel penetrated through an inlet port, onto the fuel tank. <P>SOLUTION: This hose fastening structure comprises the inlet port 1, a reinforcement collar 3, a hose 4, a clamp 5 and a seal member 6, and an end portion 40 of the hose 4 is positioned at a tip end side of the inlet port 1 with respect to the seal member 6 mounted at a basic end side of the inlet port 1. In this hose fastening structure, as the fluid flowing in the hose is not stored between the inlet port and the hose, a problem caused by additive of the hose dissolved in the fluid and then flowing out, can be prevented. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a hose fastening structure for fastening a hose, and more particularly to a fastening structure for a fuel tank and a hose.

  2. Description of the Related Art Conventionally, hoses made of various materials such as metal, synthetic resin, and rubber have been used in order to configure a flow path through which fluids such as various liquids and gases flow. One example of a fluid flow path constituted by such a hose is a vehicle fuel hose. The fuel hose of the vehicle connects, for example, a fueling device of the vehicle and a fuel tank, and guides fuel supplied to the fueling device to the fuel tank.

  The fuel hose is fastened to the fuel tank, for example, by the configuration shown in FIG. In the fuel hose fastening structure shown in FIG. 3, the cylindrical inlet port 1 protruding from the fuel tank 2 is inserted into the end 40 of the fuel hose 4, and the fuel hose 4 is fastened by the clamp 5. In general, the inlet port 1 is made of high-density polyethylene (HDPE), and the fuel hose 4 is made of a low-permeability elastomer blended with nitrile rubber (NBR) and polyvinyl chloride (PVC).

  Moreover, in the said fastening structure, you may arrange | position a metal reinforcement collar inside the inlet port. An example in which a reinforcing collar is used in a fastening structure for fastening a hose is shown in FIG. By arranging the reinforcing collar, it is possible to suppress deformation due to the fastening force when fastening by the clamp is performed.

  However, the fuel hose fastening structure shown in FIG. 3 has a problem that fuel permeates through the inlet port 1. The fuel that has permeated through the inlet port 1 is accumulated between the outer peripheral surface of the inlet port 1 and the inner peripheral surface of the fuel hose 4, and the additive is eluted from the fuel hose 4 into the accumulated fuel. Additives eluted from the fuel hose 4 include plasticizers and anti-aging agents that impart heat resistance and oxidation resistance. Of the fuel accumulated between the inlet port 1 and the fuel hose 4, the fuel accumulated on the base end side of the inlet port 1 (the fuel hose end 40 side) from the seal portion pressed by the clamp 5 is , Flows out from the interface and leans on the outer peripheral surface of the fuel tank 2. The fuel that is applied to the outer peripheral surface of the fuel tank 2 contains an additive, and the components having the volatility of the fuel are volatilized after the fuel tank 2 is applied to the outer peripheral surface of the fuel tank 2. However, the appearance of the fuel tank 2 was greatly reduced.

  Further, the elution of the additive from the fuel hose 4 deteriorates the performance of the fuel hose 4 and also deteriorates the sealing performance and the pullability.

  Further, although the amount of fuel that permeates through the inlet port 1 can be reduced by forming the reinforcing collar 3 from a metal that does not permeate fuel, the fuel that has penetrated between the reinforcing collar 3 and the inlet port 1 can be reduced. The above-mentioned problem was generated through transmission.

As one method for suppressing the occurrence of problems due to deterioration of the fuel hose, there is a method of expanding the diameter of the end of the fuel hose. The fastening structure of this fuel hose is shown in FIG. This fastening structure is formed by expanding the diameter of the end portion 40 of the fuel hose 4 on the tip side from the seal portion sealed by the clamp 5. That is, a gap is formed between the end portion 40 of the fuel hose 4 and the inlet port 1, and the fuel that has permeated through the inlet port 1 volatilizes immediately in this gap. That is, in this structure, fuel is not accumulated between the inlet port 1 and the fuel hose 4 so that fuel does not drip on the outer peripheral surface of the fuel tank 2.
JP-A-8-216257

  The present invention has been made in view of the above circumstances, and it is an object of the present invention to provide a hose fastening structure capable of suppressing the fuel that has permeated through the inlet port from dripping into the fuel tank and reducing the appearance of the fuel tank. To do.

  In order to solve the above-mentioned problems, the present inventor has studied the fastening structure in which the liquid that has permeated through the inlet port does not collect between the hose and the hose fastening structure.

  That is, the hose fastening structure of the present invention includes a resin-made cylindrical inlet port, a metal cylindrical reinforcing collar inserted into the inlet port, and an end of the inlet port in a state where the reinforcing collar is arranged. A hose inserted into the inlet port, a clamp that fastens the hose with the inlet port inserted, and a distal end side and a proximal end side of the inlet port between the inlet port and the reinforcing collar where the clamp is fastened. A hose fastening structure including two arranged sealing members, wherein an end portion of the hose is positioned closer to a distal end side of the inlet port than an end portion of a reinforcing collar on a proximal end side of the inlet port. Hose fastening structure.

  Further, another hose fastening structure of the present invention includes a resin-made cylindrical inlet port, a cylindrical main body portion built in the inlet port, and an outer peripheral surface of the inlet port provided at the tip of the main body portion. A metal cylindrical reinforcing collar having a sealing rib projecting from the hose, a hose in which the tip of the inlet port is inserted into the end with the reinforcing collar disposed, a clamp for fastening the hose, and the inlet port And a sealing member disposed on the base end side of the inlet port at a position where the clamp is fastened between the reinforcing collar and the reinforcing collar, wherein the end of the hose is the base end side of the inlet port It is characterized in that it is located on the tip side of the inlet port from the end of the reinforcing collar.

  In the hose fastening structure of the present invention, the fluid flowing in the hose does not accumulate between the inlet port and the hose, and it is possible to prevent the fluid from flowing out after the hose additive elutes into the fluid. Yes.

(First invention)
The hose fastening structure of the present invention is composed of an inlet port, a reinforcing collar, a hose, a clamp, and two seal members.

  The inlet port has a cylindrical shape made of resin. The inlet port is a member to which the hose is fastened, and the tip is inserted into the hose and fastened. In the present invention, the end portion on the proximal end side of the inlet port is not particularly limited. That is, even if it fastens with another hose by the fastening structure of this invention, it may be joined with the tank which stores a fluid. The resin that forms the inlet port is not particularly limited as long as it is a resin that can form a port shape.

  The reinforcing collar is a metallic cylindrical member inserted in the inlet port. The reinforcement collar is made of metal and has high rigidity. The reinforcing collar suppresses deformation of the inlet port when inserted into the inlet port. Specifically, since the fastening structure of the present invention is fastened by pressing the hose against the inlet port with the clamp, the inlet port is deformed when the fastening force of the clamp is increased. At this time, if a reinforcing collar is disposed inside the inlet port, the fastening force can be received by the rigidity of the reinforcing collar, and deformation of the inlet port can be suppressed. Further, since the reinforcing collar is made of metal, the fluid flowing in the hose does not pass through the reinforcing collar. The reinforcing collar has a cylindrical shape whose outer peripheral surface substantially coincides with the inner peripheral surface of the inlet port. The type of metal forming the reinforcing collar is not particularly limited as long as it is a material that can receive the fastening force of the clamp without causing a change (reaction) to the fluid flowing inside the hose.

  The hose is a member connected to the inlet port, and forms a flow path through which fluid flows. An inlet port is inserted into the end portion of the hose in a state where the reinforcing collar is disposed. The hose can be formed from a conventionally known material.

  The clamp fastens the hose with the inlet port inserted. By this fastening, the hose is fixed to the inlet port. Here, the fastening and fixing of the hose by the clamp is performed on the outer periphery of the inlet port in a state where the inlet port is inserted into the hose. The clamp is not particularly limited as long as it is a member that can fasten and fix the hose to the inlet port.

  The seal member is disposed between the inlet port and the reinforcing collar. By disposing the seal member between the inlet port and the reinforcing collar, fluid does not enter between the inlet port and the reinforcing collar. And a sealing member is arrange | positioned at the front end side and proximal end side of the inlet port of the position which a clamp fastens. By disposing the seal member at two positions on the distal end side and the proximal end side, even if the fluid enters between the inlet port and the reinforcing collar, the fluid does not enter the portion sandwiched between the two seal members.

  The seal member only needs to be a member that can exhibit a sealing property between the inlet port and the reinforcing collar. For example, a fluororubber O-ring can be used.

  Moreover, in the fastening structure of this invention, the means for arrange | positioning a sealing member between an inlet port and a reinforcement collar can be selected suitably. For example, a groove may be formed on at least one of the inner peripheral surface of the inlet port and the outer peripheral surface of the reinforcing collar, and a seal member may be disposed in the groove.

  In the fastening structure of the present invention, the end of the hose is positioned closer to the distal end side of the inlet port than the seal member on the proximal end side of the inlet port. Even if fluid enters between the inlet port and the reinforcing collar, the presence of the seal member prevents the fluid from entering the portion between the two seal members. In the fastening structure of the present invention, the seal member that is one of the two seal members and is disposed on the proximal end side of the inlet port is located on the proximal end side from the end portion of the hose. Here, the base end side from the end portion of the hose where the seal member is disposed includes the same position as the end portion of the hose. The seal member arranged on the base end side of the inlet port is located on the base end side from the end of the hose, so that even if fluid enters between the inlet port and the reinforcing collar and passes through the inlet port, the hose The fluid permeates to a place where there is no water That is, fluid does not accumulate between the inlet port and the hose. As a result, the problem that has occurred due to the accumulation of fluid between the inlet port and the hose does not occur.

  It is preferable that the inlet port has a rib projecting radially outward at a tip portion thereof. Since the inlet port has a rib, the sealing property between the tip of the inlet port and the hose is improved, and fluid does not enter between the inlet port on the tip side of the inlet port and the hose from the position where the clamp seals.

  And it is preferable that the seal member which is one of the two seal members and is arranged on the tip side is located on the tip side from the seal portion of the rib. Since the seal member is positioned on the tip side from the seal portion of the rib, even if fluid enters between the inlet port and the reinforcing collar and permeates the inlet port, it permeates to the tip side of the rib. That is, fluid does not accumulate between the inlet port and the hose. As a result, the problem that has occurred due to the accumulation of fluid between the inlet port and the hose does not occur.

  The inlet port preferably has a protrusion with which the end of the reinforcing collar abuts against the side wall surface. The protrusion is formed so as to protrude radially inward in the cylindrical interior of the inlet port. When the end portion of the reinforcing collar comes into contact with the side wall surface of the protrusion formed in the inlet port, the axial displacement of the reinforcing collar can be restricted and the reinforcing collar can be positioned. That is, it becomes easy to install the reinforcing collar.

  In the hose fastening structure of the present invention, fluid does not accumulate between the inlet port and the hose, and problems caused by fluid accumulation during this time are not generated. That is, it can be used for a fastening portion where a problem has occurred in a conventional hose fastening structure. In particular, in the fastening of the vehicle fuel tank and the fuel hose, a problem due to fuel dripping has occurred, but the occurrence of such a problem can be suppressed by using the fastening structure of the present invention. That is, it is preferable that the fastening structure of the hose of the present invention is a fastening structure of the inlet port of the vehicle fuel tank and the fuel hose.

(Second invention)
The hose fastening structure of the present invention is composed of an inlet port, a reinforcing collar having a main body portion and a seal rib, a hose, a clamp, and a seal member.

  The inlet port has a cylindrical shape made of resin. The inlet port is a member to which the hose is fastened, and the tip is inserted into the hose and fastened. In the present invention, the end portion on the proximal end side of the inlet port is not particularly limited. That is, even if it fastens with another hose by the fastening structure of this invention, it may be joined with the tank which stores a fluid. The resin that forms the inlet port is not particularly limited as long as it is a resin that can form a port shape.

  The reinforcing collar is a metallic cylindrical member having a cylindrical main body portion built in the inlet port, and a seal rib protruding from the outer peripheral surface of the inlet port provided at the distal end portion of the main body portion. The reinforcement collar is made of metal and has high rigidity.

  The main body portion of the reinforcing collar suppresses deformation of the inlet port when inserted into the inlet port. Specifically, since the fastening structure of the present invention is fastened by pressing the hose against the inlet port with the clamp, the inlet port is deformed when the fastening force of the clamp is increased. At this time, if the reinforcing collar is arranged inside the inlet port, the fastening force can be received by the rigidity of the main body portion of the reinforcing collar, and the deformation of the inlet port is suppressed. Further, since the reinforcing collar is made of metal, the fluid flowing in the hose does not pass through the reinforcing collar. The main body portion of the reinforcing collar has a cylindrical shape whose outer peripheral surface substantially coincides with the inner peripheral surface of the inlet port.

  The seal rib of the reinforcing collar is provided so as to protrude from the outer peripheral surface of the inlet port at the tip of the main body. Here, the front end portion of the main body portion is an end portion located on the front end portion side of the inlet port when the reinforcing collar is assembled to the inlet port. By providing the seal rib at the tip of the main body, the sealing performance between the reinforcing collar and the hose is improved, and fluid does not enter between the inlet port and the hose on the tip side of the inlet port from the position where the clamp seals. Here, since the seal rib protruding from the outer peripheral surface of the inlet port is provided at the distal end portion of the reinforcing collar, the end portion on the distal end side of the main body portion protrudes from the distal end of the inlet port.

  The type of metal forming the reinforcing collar is not particularly limited as long as it is a material that can receive the fastening force of the clamp without causing a change (reaction) to the fluid flowing inside the hose.

  The hose is a member connected to the inlet port, and forms a flow path through which fluid flows. An inlet port is inserted into the end portion of the hose in a state where the reinforcing collar is disposed. The hose can be formed from a conventionally known material.

  The clamp fastens the hose with the inlet port inserted. By this fastening, the hose is fixed to the inlet port. Here, the fastening and fixing of the hose by the clamp is performed on the outer periphery of the inlet port in a state where the inlet port is inserted into the hose. The clamp is not particularly limited as long as it is a member that can fasten and fix the hose to the inlet port.

  The seal member is disposed between the inlet port and the reinforcing collar. By disposing the seal member between the inlet port and the reinforcing collar, fluid does not enter between the inlet port and the reinforcing collar. And a sealing member is arrange | positioned at the base end side of the inlet port of the position which a clamp fastens. By disposing the seal member on the proximal end side, even if fluid enters between the inlet port and the reinforcing collar, the fluid does not enter from the seal member to the distal end side.

  The seal member only needs to be a member that can exhibit a sealing property between the inlet port and the reinforcing collar. For example, a fluororubber O-ring can be used.

  Moreover, in the fastening structure of this invention, the means for arrange | positioning a sealing member between an inlet port and a reinforcement collar can be selected suitably. For example, a groove may be formed on at least one of the inner peripheral surface of the inlet port and the outer peripheral surface of the reinforcing collar, and a seal member may be disposed in the groove.

  In the fastening structure of the present invention, the end of the hose is positioned closer to the distal end side of the inlet port than the seal member on the proximal end side of the inlet port. Even if fluid enters between the inlet port and the reinforcing collar, the presence of the seal member prevents the fluid from entering the portion between the two seal members. In the fastening structure of the present invention, the seal member that is one of the two seal members and is disposed on the proximal end side of the inlet port is located on the proximal end side from the end portion of the hose. Here, the base end side from the end portion of the hose where the seal member is disposed includes the same position as the end portion of the hose. The seal member arranged on the base end side of the inlet port is located on the base end side from the end of the hose, so that even if fluid enters between the inlet port and the reinforcing collar and passes through the inlet port, the hose The fluid permeates to a place where there is no water That is, fluid does not accumulate between the inlet port and the hose. As a result, the problem that has occurred due to the accumulation of fluid between the inlet port and the hose does not occur.

  A locking claw that protrudes radially outward is formed at the proximal end of the reinforcing collar, and a locking portion that locks the locking claw is formed at the proximal end of the inlet pipe. It is preferred that By forming the locking claw and the locking portion, the axial displacement of the reinforcing collar can be restricted, and the reinforcing collar can be positioned. That is, it becomes easy to install the reinforcing collar. Here, the latching part of the inlet port is not particularly limited as long as it has a structure capable of latching the latching claw, and can be, for example, a recess in which the latching claw is latched.

  It is preferable that the end surface of the tip of the inlet port is in contact with the sealing rib of the reinforcing collar. When the tip of the inlet port contacts the seal rib, the end of the inlet port contacts the side wall surface of the seal rib because the seal rib protrudes from the tip of the inlet port. The contact between the inlet port and the seal rib eliminates the gap between the inlet port and the seal rib, and the fluid that has entered beyond the seal rib does not enter between the inlet port and the reinforcing collar.

  In the hose fastening structure of the present invention, fluid does not accumulate between the inlet port and the hose, and problems caused by fluid accumulation during this time are not generated. That is, it can be used for a fastening portion where a problem has occurred in a conventional hose fastening structure. In particular, in the fastening of the vehicle fuel tank and the fuel hose, a problem due to fuel dripping has occurred, but the occurrence of such a problem can be suppressed by using the fastening structure of the present invention. That is, it is preferable that the fastening structure of the hose of the present invention is a fastening structure of the inlet port of the vehicle fuel tank and the fuel hose.

  Hereinafter, the present invention will be described using examples.

  As an embodiment of the present invention, an inlet port of a fuel tank of a vehicle and a fuel hose were fastened.

Example 1
Fastening of the fuel tank inlet port and the fuel hose is constituted by the inlet port 1, the reinforcing collar 3, the fuel hose 4, the clamp 5 and the O-ring 6.

  The fuel tank inlet port 1 is made of HDPE and has a cylindrical shape integrally formed with the fuel tank 2. The inlet port 1 is formed so as to protrude from the surface 2 a of the fuel tank 2.

  A flange portion 10 that protrudes inward in the radial direction of the cylindrical inlet port 1 is formed at an end portion of the inlet port 1 on the fuel tank 2 side. Further, a seal rib 11 protruding outward in the radial direction is formed at an end of the inlet port 1 on the front end side protruding from the fuel tank 2. Here, both the flange portion 10 and the seal rib 11 are formed over the entire circumference of the inlet port 1 in the circumferential direction.

  The reinforcing collar 3 has a metal cylindrical shape, and has an outer peripheral shape that substantially matches the inner peripheral shape of the inlet port 1. In addition, seal grooves 30 and 31 are formed on the outer periphery of the reinforcing collar 3 over the entire circumference in the vicinity of the end portion 3A on the distal end side and the end portion 3B on the proximal end side. The reinforcing collar 3 is formed such that its axial length is slightly shorter than the length of the inlet port 1.

  The fuel hose 4 is made of a low-permeability elastomer blended with NBR and PVC. The end portion 40 of the fuel hose 4 is formed to have an inner peripheral shape that substantially matches the outer peripheral shape of the inlet port 1.

  The clamp 5 is a member that is disposed on the outer peripheral surface portion of the fuel hose 4 and applies stress inward in the radial direction. Specifically, it is composed of a belt-like band 50 disposed in the circumferential direction on the outer peripheral surface portion of the fuel hose 4 and an adjusting means 51 that adjusts the circumferential length of a circle formed by the band 50.

  The O-ring 6 is made of fluoro rubber and has an annular shape disposed in the seal grooves 30 and 31 of the reinforcing collar 3. In the present embodiment, an O-ring 60 disposed in the seal groove 30 and an O-ring 61 disposed in the seal groove 31 are used.

  The inlet port 1 of the fuel tank 2 and the fuel hose 4 are fastened.

  First, the O-ring 6 is disposed in each of the seal grooves 30 and 31 of the reinforcing collar 3. Then, the reinforcing collar 3 in which the O-rings 60 and 61 are disposed in the seal grooves 30 and 31 is inserted into the inlet port 1 from the tip thereof. The reinforcing collar 3 inserted into the inlet port 1 changes in the inlet port 1 in the axial direction, and the proximal end portion 3 </ b> B abuts on the flange portion 10. Thereby, the reinforcing collar 3 could be inserted into the inlet port 1 in a coaxial state.

  Subsequently, the fuel hose 4 was extrapolated to the inlet port 1. The end portion 40 of the fuel hose 4 extrapolated to the inlet port 1 was installed such that the end surface thereof was spaced from the surface of the fuel tank 2.

  And the band 50 of the clamp 5 was installed in the position where the inlet port 1 and the edge part 40 of the fuel hose 4 overlapped, and the band 50 was diameter-reduced by the adjustment means 51, and was fastened. When the diameter of the band 50 is reduced, a stress directed radially inward is applied to the inlet port 1 and the fuel hose 2.

  When stress directed radially inward is applied to the inlet port 1, the inlet port 1 is pressed toward the reinforcing collar 3. O-rings 60 and 61 are disposed between the reinforcing collar 3 and the inlet port 1, and when the inlet port 1 is pressed, the O-rings 60 and 61 are compressed and the sealing performance of both is enhanced. In particular, fuel does not enter between the O-rings 60 and 61.

  Further, when the fuel hose 4 is pressed against the inlet port 1, the inlet port 1 and the fuel hose 4 are pressure-bonded so that fuel does not enter between them. In particular, since the seal rib 11 is provided at the distal end portion of the inlet port 1, the seal rib 11 and the fuel hose 4 are sealed, and the adhesion from the seal rib 11 to the base end side is improved.

  As a result, the inlet port 1 and the fuel hose 4 of the fuel tank 2 of the vehicle of this embodiment are fastened. A cross section of the inlet port 1 to which the fuel hose 4 is fastened is shown in FIG.

  In the fastening structure of the present embodiment, the end surface of the end portion 40 of the fuel hose 4 is located on the distal end side from the sealing position by the O-ring 60 disposed between the inlet port 1 and the reinforcing collar 3. As a result, even if fuel enters between the inlet port 1 and the reinforcing collar 3 from the proximal end side of the inlet port 1, it does not enter the distal end side from the O-ring 60. Even if the fuel that has entered the base end side from the O-ring 60 passes through the inlet port 1 and goes outside from the outer peripheral surface, there is no fuel hose 4 and the fuel does not collect on the outer peripheral surface of the inlet port 1. To do. That is, fuel accumulates between the inlet port 1 and the fuel hose 4 so that the additive contained in the fuel hose 4 does not elute. As a result, inconvenience caused by the accumulation of fuel between the inlet port and the fuel hose, which has occurred in the conventional fastening structure, does not occur in the structure of this embodiment.

  Further, in the fastening structure of the present embodiment, the sealing position of the seal rib 11 at the distal end portion of the inlet port 1 is located on the proximal end side from the sealing position by the O-ring 61 disposed between the inlet port 1 and the reinforcing collar 3. is doing. Thus, even if fuel enters between the inlet port 1 and the reinforcing collar 3 from the distal end side of the inlet port 1, it does not enter the proximal end side from the O-ring 61. Even if the fuel that has entered the tip side from the O-ring 61 permeates through the inlet port 1, the fuel penetrates from the seal position by the seal rib 11 to the tip side. In other words, it penetrates into the fuel passage partitioned by the fuel hose 4. That is, fuel accumulates between the inlet port 1 and the fuel hose 4 so that the additive contained in the fuel hose 4 does not elute. As a result, inconvenience caused by the accumulation of fuel between the inlet port and the fuel hose, which has occurred in the conventional fastening structure, does not occur in the structure of this embodiment.

  As described above, in the fastening structure of the fuel tank 2 and the fuel hose 4 according to the present embodiment, the fuel does not collect between the inlet port 1 and the fuel hose 4, and the additive of the fuel hose 4 is contained in the fuel. The fuel hose 4 does not deteriorate because it is no longer eluted. In addition, since the fuel does not collect between the fuel hose 4 and the inlet port 1, it is possible to prevent the fuel from deteriorating the appearance of the fuel tank 2.

(Example 2)
Fastening of the fuel tank inlet port and the fuel hose is constituted by the inlet port 1, the reinforcing collar 3, the fuel hose 4, the clamp 5 and the O-ring 6.

  The inlet port 1 of the fuel tank 2 is made of HDPE and has a cylindrical shape formed integrally with the fuel tank 2. The inlet port 1 is formed so as to protrude from the surface 2 a of the fuel tank 2. The inlet port 1 is provided such that its axial direction is perpendicular to the inner wall surface 2 b of the fuel tank 2. That is, the inner wall surface 2 b of the portion where the inlet port 1 is formed extends in a direction perpendicular to the axial direction of the inlet port 1.

  The reinforcing collar 3 includes a main body 32 having a cylindrical shape made of metal, a seal rib 33 which is integrally formed at an end portion on the distal end side of the main body portion 32 and protrudes radially outward, and a proximal end side of the main body portion 32. A locking claw 34 is provided integrally with the end and protrudes radially outward. The main body portion 32 has a shape in which the outer peripheral shape substantially coincides with the inner peripheral shape of the inlet port 1. Further, a seal groove 30 is formed over the entire circumference in the circumferential direction on the outer periphery in the vicinity of the proximal end of the main body 32 of the reinforcing collar 3. The main body 32 of the reinforcing collar 3 is formed such that the axial length is longer than the length of the inlet port 1.

  The seal rib 33 is formed to protrude radially outward at the tip of the main body 32 of the reinforcing collar 3 over the entire circumference. The protruding height of the seal rib 33 is a height protruding from the outer peripheral surface of the inlet port 1 when the reinforcing collar 3 is layered on the inlet port 1.

  The locking claw 34 includes a claw main body 340 protruding from the outer peripheral surface of the main body portion 32, and a displacement portion 341 having a part of the main body portion 32 and having the claw main body portion 340 displaceable in the radial direction. The The claw main body 340 protrudes radially outward from the main body 32, the proximal surface 340 a is inclined, and the distal surface 340 b is formed in a substantially triangular cross section perpendicular to the axial direction of the main body. . The displacement part 341 has the claw body part 340 integrally and holds the position of the claw body part 340. The displacement part 341 causes the claw body part 340 to elastically displace radially inward.

  The reinforcing collar 3 is formed so that the length between the side wall surface on the proximal end side of the seal rib 33 and the surface 340b on the distal end side of the locking claw 34 is the same as the axial length of the inlet port 1. Yes.

  The fuel hose 4 is made of a low fuel permeability resin in which NBR and PVC are polymerized. The end portion 40 of the fuel hose 4 is formed to have an inner peripheral shape that substantially matches the outer peripheral shape of the inlet port 1.

  The clamp 5 is a member that is disposed on the outer peripheral surface portion of the fuel hose 4 and applies stress inward in the radial direction. Specifically, it is composed of a belt-like band 50 disposed in the circumferential direction on the outer peripheral surface portion of the fuel hose 4 and an adjusting means 51 that adjusts the circumferential length of a circle formed by the band 50.

  The O-ring 6 has an annular shape disposed in the seal groove 30 of the reinforcing collar 3.

  The inlet port 1 of the fuel tank 2 and the fuel hose 4 are fastened.

  First, the O-ring 6 is disposed in the seal groove 30 of the reinforcing collar 3. Then, the reinforcing collar 3 in which the O-ring 6 is disposed in the seal groove 30 is inserted into the inside of the inlet port 1 from the end on the base end side where the locking claw 34 is formed. At this time, the locking claw 34 is displaced radially inward by the action of the inclined base end surface 340 a of the claw main body 34 and the inner peripheral surface of the inlet port 1. Then, the reinforcing collar 3 shifts in the inlet port 1 in the axial direction, and the locking claw 34 passes through the inlet port 1. When the locking claw 34 passes through the inlet port 1, the end face of the end portion on the distal end side of the inlet port 1 hits the side wall surface on the proximal end side of the seal rib 33, and the reinforcing collar 3 is not displaced further inside. At the same time, the claw main body 340 of the locking claw 34 is displaced radially outward by the elastic deformation of the displacement portion 341 and protrudes from the outer surface of the main body 32. The front surface 340 b of the claw body 340 contacts the inner wall surface 2 b of the fuel tank 2. As a result, the reinforcing collar 3 could be inserted into the inlet port 1.

  Subsequently, the fuel hose 4 was extrapolated to the inlet port 1. The end portion 40 of the fuel hose 4 extrapolated to the inlet port 1 was installed such that the end surface thereof was spaced from the surface of the fuel tank 2.

  And the band 50 of the clamp 5 was installed in the position where the inlet port 1 and the edge part 40 of the fuel hose 4 overlapped, and the band 50 was diameter-reduced by the adjustment means 51, and was fastened. When the diameter of the band 50 is reduced, a stress directed radially inward is applied to the inlet port 1 and the fuel hose 2.

  When stress directed radially inward is applied to the inlet port 1, the inlet port 1 is pressed toward the reinforcing collar 3. An O-ring 6 is disposed between the reinforcing collar 3 and the inlet port 1, and when the inlet port 1 is pressed, the O-ring 6 is compressed and the sealing performance of both is enhanced.

  Further, when the fuel hose 4 is pressed against the inlet port 1, the inlet port 1 and the fuel hose 4 are pressure-bonded so that the fuel does not enter between them.

  Further, in this embodiment, the seal rib 33 of the reinforcing collar 3 is provided at a position protruding from the tip of the inlet port 1, so that the seal rib 33 and the fuel hose 4 are sealed, and fuel is supplied from the seal rib 33 to the base end side. No longer invades.

  As a result, the inlet port 1 and the fuel hose 4 of the fuel tank 2 of the vehicle of this embodiment are fastened. A cross section of the inlet port 1 to which the fuel hose 4 is fastened is shown in FIG.

  In the fastening structure of the present embodiment, the end surface of the end portion 40 of the fuel hose 4 is located on the distal end side from the sealing position by the O-ring 6 disposed between the inlet port 1 and the reinforcing collar 3. As a result, even if fuel enters between the inlet port 1 and the reinforcing collar 3 from the proximal end side of the inlet port 1, it does not enter the distal end side from the O-ring 6. Even if the fuel that has entered the base end side from the O-ring 6 passes through the inlet port 1 and goes outside from the outer peripheral surface, there is no fuel hose 4 and fuel does not collect on the outer peripheral surface of the inlet port 1. To do. That is, fuel accumulates between the inlet port 1 and the fuel hose 4 so that the additive contained in the fuel hose 4 does not elute. As a result, inconvenience caused by the accumulation of fuel between the inlet port and the fuel hose, which has occurred in the conventional fastening structure, does not occur in the structure of this embodiment.

  Further, in the fastening structure of the present embodiment, the sealing position of the seal rib 33 is located at the distal end portion of the reinforcing collar 3. As a result, the fuel does not enter between the seal rib 33 and the fuel hose 4 so that the fuel does not enter between the inlet port 1 and the reinforcing collar 3 from the front end side of the inlet port 1.

  As described above, in the fastening structure of the fuel tank 2 and the fuel hose 4 according to the present embodiment, the fuel does not collect between the inlet port 1 and the fuel hose 4, and the additive of the fuel hose 4 is contained in the fuel. The fuel hose 4 does not deteriorate because it is no longer eluted. In addition, since the fuel does not collect between the fuel hose 4 and the inlet port 1, it is possible to prevent the fuel from deteriorating the appearance of the fuel tank 2.

It is the figure which showed the cross section of the inlet port to which the fuel hose of Example 1 was fastened. It is the figure which showed the cross section of the inlet port to which the fuel hose of Example 2 was fastened. It is the figure which showed the cross section of the inlet port to which the conventional fuel hose was fastened. It is the figure which showed the cross section of the inlet port to which the fuel hose which the end part expanded diameter was fastened.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1: Inlet port 10: Flange part 11: Seal rib 2: Fuel tank 3: Reinforcement collar 30, 31: Seal groove 32: Main part 33: Seal rib 34: Locking claw 340: Claw main part 341: Transition part 4: Fuel hose 40: End portion 5: Clamp 50: Band 51: Adjustment means 6, 60, 61: O-ring

Claims (9)

A plastic cylindrical inlet port;
A metal cylindrical reinforcing collar inserted into the inlet port;
A hose in which the inlet port is inserted into the end with the reinforcing collar disposed;
A clamp for fastening the hose with the inlet port inserted;
Two sealing members disposed between the inlet port and the reinforcing collar, respectively, on the distal end side and the proximal end side of the inlet port at a position where the clamp is fastened;
A hose fastening structure comprising:
The hose fastening structure characterized in that the end portion of the hose is positioned closer to the distal end side of the inlet port than the seal member disposed on the proximal end side of the inlet port.   The hose fastening structure according to claim 1, wherein the inlet port has a rib projecting radially outward at a tip portion thereof.   The hose fastening structure according to claim 1, wherein the seal member, which is one of the two seal members and is disposed on the tip side, is located on the tip side from the seal portion of the rib.   The hose fastening structure according to claim 1, wherein the inlet port has a protrusion with an end of the reinforcing collar abutting against a side wall surface.   2. The hose fastening structure according to claim 1, wherein the hose fastening structure is a fastening structure between an inlet port of a fuel tank for a vehicle and a fuel hose. A plastic cylindrical inlet port;
A metal cylindrical reinforcing collar having a cylindrical main body portion installed in the inlet port, and a seal rib projecting from the outer peripheral surface of the inlet port provided at the tip of the main body portion;
A hose in which the distal end portion of the inlet port is inserted into the end portion in a state where the reinforcing collar is disposed;
A clamp for fastening the hose;
A seal member disposed on the proximal side of the inlet port between the inlet port and the reinforcing collar at a position where the clamp is fastened;
A hose fastening structure comprising:
The hose fastening structure characterized in that the end portion of the hose is positioned closer to the distal end side of the inlet port than the seal member disposed on the proximal end side of the inlet port.   A locking claw that protrudes radially outward is formed at the proximal end of the reinforcing collar, and the locking claw that the locking claw locks at the proximal end of the inlet pipe. The hose fastening structure according to claim 6, wherein a portion is formed.   The hose fastening structure according to claim 6, wherein an end face of a tip of the inlet port is in contact with the seal rib of the reinforcing collar. The hose fastening structure according to claim 6, which is a fastening structure of an inlet port of a fuel tank for a vehicle and a fuel hose.

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