JPH06323483A - Fuel tube connecting device - Google Patents

Abstract

PURPOSE:To keep a distance constant between fuel tubes connected to each other in a simple structure, and connect the fuel tubes reliably to each other. CONSTITUTION:The first engaging protrusive part 16 and the second engaging protrusive part 18 are formed in a floor fuel tube 14, and a fuel tube connecting connector 20 is installed in a fuel tube 12. An engaging claw part 22 is formed in the fuel tube connecting connector 20, and the first engaging protrusive part 16 of the floor fuel tube 14 is engaged with this engaging claw part 22. Notches 28 and 30 are formed in the opposed side wall parts 27A and 27B of a clamp 27, and the second engaging protrusive part 18 of the floor fuel tube 14 and an engaging recessed part 25 of the fuel tube connecting connector 20 are engaged respectively with these notches 28 and 30. The vicinity of the opening side end part of the side wall part 27A of the clamp 27 becomes gradually narrow in the inserting direction in a distance between both side wall parts 27A and 27B.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fuel tube connecting device for connecting a fuel tube connected to a fuel tank and a fuel tube connected to a fuel pump.

[0002]

2. Description of the Related Art In recent years, when connecting a fuel tube connected to a main fuel tank and a fuel tube connected to a fuel pump, compared to a flare joint connection and a rubber hose connection that have been conventionally used. A one-touch connector that improves workability is used.

An example of a fuel tube connecting device using this one-touch connector is disclosed in Japanese Patent Application Laid-Open No. 3-3331.
No. 94 publication.

As shown in FIG. 5, in this fuel tube coupling device, a fuel tube connecting connector 72 to which a fuel tube 70 is connected is fixed to a fuel tank by a bracket and a body assembly (not shown). The engaging claw portion 72A of the fuel tube connecting connector 72 is engaged with the first engaging convex portion 74A of the floor fuel tube 74 connected to the fuel pump. Along with this, the side wall portion 76A of the clamp 76 coupled to the body assembly engages with the second engaging convex portion 74B of the floor fuel tube 74, and the floor fuel tube 74 is supported by the clamp 76. Therefore, in this fuel tube coupling device, the distance between the fuel tube 70 and the floor fuel tube 74 can be maintained at a constant distance. Therefore, the deformation stress acting on the elastic ring 78 provided between the fuel tube 70 and the fuel tube connecting connector 72 is reduced, and the elastic ring 7
It is possible to extend the life of No. 8.

[0005]

However, in this fuel tube coupling device, a component for maintaining a constant distance between the fuel tube 70 and the floor fuel tube 74, for example, a fuel tube connecting connector 72 is supported. Parts such as a bracket, a body assembly, and a clamp 76 that supports the floor fuel tube 74 make up a large number of parts in the entire apparatus and complicate the structure.

In consideration of the above facts, the present invention is capable of maintaining a constant distance between the fuel tubes which are connected to each other with a simple structure and is also capable of reliably connecting the fuel tubes to each other. The purpose is to obtain.

[0007]

According to a first aspect of the present invention, there is provided a connecting device for a fuel tube, wherein a first engaging convex portion is formed in the vicinity of a connecting end and the first engaging convex portion is connected. An insertion side fuel tube having a second engaging convex portion formed at a position separated from the end side, an insertion side fuel tube being coupled to one end portion, and the insertion side fuel tube being connected to the other end portion. A fuel tube connecting connector which has an engaging claw part that is inserted and engages with the first engaging convex part, and has an engaging concave part at a position separated from the engaging claw part on the side opposite to the connecting end. A holding member for accommodating a connecting portion between the insertion side fuel tube and the fuel tube connecting connector and having a box shape having a U-shaped cross section, wherein the one side wall portion of the holding member is provided with the holding member. Insert side fuel The second engaging projection of the tube forms a first notch that engages with the peripheral edge of the tube, and the engaging recess of the fuel tube connecting connector engages with the peripheral edge of the other side wall of the tube. The second notch is formed, and at least one of the opposing side wall portions is inclined along the insertion direction so that the distance between both side wall portions is narrowed.

[0008]

In the fuel tube connecting device according to the first aspect of the present invention, when the insertion side fuel tube is connected to the fuel tube connecting connector having the insertion side fuel tube attached to one end thereof, the insertion side fuel tube is connected. The first engaging protrusion engages with the engaging claw of the fuel tube connecting connector, and the fuel tube connecting connector brings the insertion side fuel tube and the insertion side fuel tube into a connected state. In this coupled state, the fuel tube connecting connector and the insertion side fuel tube are inserted into the holding member from the radial direction of the fuel tube along the first notch and the second notch of the holding member. In this case, the second engagement protrusion of the insertion side fuel tube is engaged with the peripheral edge of the first notch of the one side wall of the holding member facing the other side wall of the other side wall of the holding member facing the other side. By engaging the engaging recess of the fuel tube connecting connector with the peripheral edge of the second notch, the distance between the insertion side fuel tube and the insertion side fuel tube that are coupled to each other with a simple structure is kept constant. be able to.

Further, since at least one of the opposing side wall portions of the holding member is inclined so that the distance between the both side wall portions becomes narrow along the insertion direction, the connection between the fuel tube connecting connector and the insertion side fuel tube is unsuccessful. Even if perfect, by inserting the fuel tube connection connector and the insertion side fuel tube into the holding member, the connection between the fuel tube connection connector and the insertion side fuel tube is ensured.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a fuel tube connecting device of the present invention will be described with reference to FIGS.

As shown in FIG. 3, the fuel tank 1
A fuel tube 12 as an inserted side fuel tube is connected to 0, and a floor fuel tube 14 as an insertion side fuel tube connected to a fuel pump (not shown) is connected to the fuel tube 12. ing.

As shown in FIG. 2, in the vicinity of the connecting end 14A of the floor fuel tube 14, there is formed a first engaging projection 16 which projects in a ring shape outward in the radial direction. The connecting end 14A side of the first engaging projection 16 is an inclined surface 16A, and the connecting end 1 of the first engaging projection 16 is formed.
An engagement surface 16B is provided on the side opposite to 4A. Also, the first
A ring-shaped second engagement protrusion 18 is formed outward in the radial direction at a position away from the engagement protrusion 16 on the side opposite to the connecting end 14A.

A fuel tube connecting connector 20 is attached to the fuel tube 12. The fuel tube connecting connector 20 includes a large diameter portion 20A, a small diameter portion 20B, and these large diameter portion 20A and small diameter portion 20B.
And a medium-diameter portion 20C provided therebetween.

As shown in FIG. 1, a mounting portion 20D for the fuel tube 12 is provided at the tip of the small diameter portion 20B of the fuel tube connecting connector 20.
In addition, the large diameter portion 2 of the fuel tube connecting connector 20
An engaging claw portion 22 is formed in the vicinity of the tip of 0A toward the inside of the fuel tube connecting connector 20, and the engaging claw portion 22 is provided with the first engaging convex portion 16 of the floor fuel tube 14. The engagement surface 16B is engaged. An elastic ring 24 is provided between the floor fuel tube 14 and the middle diameter portion 20C of the fuel tube connecting connector 20.
Is provided to seal between the floor fuel tube 14 and the medium diameter portion 20C of the fuel tube connecting connector 20.

A claw portion 26 is formed on the outer periphery of the middle diameter portion 20C of the fuel tube connecting connector 20 at a position spaced from the engaging claw portion 22 to the side opposite to the connecting end, and the claw portion 26 has a large diameter. An engaging recess 25 is formed with the end of the portion 20A. In addition, a clamp 27 as a holding member is provided at the connecting portion between the floor fuel tube 14 and the fuel tube connecting connector 20.

As shown in FIG. 2, the clamp 27 is of a box shape having a U-shaped cross section with one surface opened. Further, a U-shaped notch 28 is formed from the opening side in one side wall portion 27A of the side wall portions 27A and 27B facing each other of the clamp 27, and the other side wall portion 27B of the clamp 27 is formed in the side wall portion 27B.
A U-shaped notch 30 is formed from the opening side.

As shown in FIG. 1, the second engaging projection 18 of the floor fuel tube 14 is engaged with the inside of the peripheral edge of the notch 28 of the clamp 27. The engaging recess 25 of the fuel tube connecting connector 20 is engaged with the peripheral edge of the notch 30 of the clamp 27. Therefore, the clamp 27 can maintain a constant distance between the floor fuel tube 14 and the fuel tube connecting connector 20.

Further, the vicinity of the opening side end of the side wall portion 27A of the clamp 27 is inclined toward the opening side so as to gradually separate from the side wall portion 27B, and the insertion direction of the floor fuel tube 14 into the clamp 27. (Direction of arrow A in FIG. 2)
The distance between the side wall portions 27A and 27B gradually becomes narrower along.

Next, the operation of this embodiment will be described. Connect the fuel tube connecting connector 20 to the fuel tube 12
And the floor fuel tube 14 is inserted into the fuel tube connecting connector 20, the first engaging portion of the floor fuel tube 14 is engaged with the engaging claw portion 22 of the fuel tube connecting connector 20, as shown in FIG. The engagement surface 16B of the convex portion 16 is engaged, and the fuel tube connecting connector 20 and the floor fuel tube 14 are engaged.
Becomes a combined state. Further, the elastic ring 24 seals between the floor fuel tube 14 and the medium-diameter portion 20C of the fuel tube connecting connector 20.

Next, the connected fuel tube connecting connector 20 and the floor fuel tube 14 are inserted into the clamp 27 in the direction of arrow A in FIG. In this case, the second engagement protrusion 18 of the floor fuel tube 14 is engaged with the inside of the peripheral edge of the notch 28 of the clamp 27. Further, the engaging recess 2 of the fuel tube connecting connector 20 is provided at the peripheral edge of the notch 30 of the clamp 27.
5 is engaged. As a result, the floor fuel tube 14 and the fuel tube connecting connector 20 can be kept at a constant distance with a simple structure, so that the assembly work time can be shortened and the productivity is greatly improved. Further, the deformation stress acting on the elastic ring 24 can be reduced and the life of the elastic ring 24 can be extended.

In the vicinity of the opening side end of the side wall 27A of the clamp 27, both side wall parts 27 are formed along the direction of arrow A in FIG.
Since the distance between A and 27B is gradually narrowed, even if the floor fuel tube 14 and the fuel tube connecting connector 20 are not completely connected to each other, the floor fuel tube 14 and the fuel tube connecting connector 20 are not connected to each other. By inserting into the clamp 27, the floor fuel tube 14 and the fuel tube connecting connector 20 can be securely connected, and the floor fuel tube 14 and the fuel tube connecting connector 20 can be prevented from coming off.

Further, in this embodiment, since the connecting portion between the floor fuel tube 14 and the fuel tube connecting connector 20 is housed in the box-shaped clamp 27, the connecting portion between the floor fuel tube 14 and the fuel tube connecting connector 20 is connected. It is possible to reduce the adhesion of mud and dust.
Further, as shown in FIG. 4, a cap 40 is provided at the opening of the clamp 27 so as to be openable and closable by a hinge 40A, and is inserted into the floor fuel tube 14, the fuel tube connecting connector 20 and the clamp 27, and then opened with the cap 40. The floor fuel tube 14 and the fuel tube connecting connector 20 are coupled by closing the portion and engaging the engaging claw portion 40B provided on the cap 40 with the engaging hole 42 formed near the opening of the clamp 27. It is possible to significantly reduce the adhesion of mud and dust to the parts.

In this embodiment, the fuel tube connecting connector 20 is attached to the fuel tube 12 side, but instead of this, the fuel tube connecting connector 20 is attached to the floor fuel tube 14 side and The fuel tube 12 and the fuel tube 12 may be supported by the clamp 27. Further, in this embodiment, one side wall portion 27A of the clamp 27 is used.
Although the slope is provided only on the side wall, instead of this, the slope may be provided only on the other side wall portion 27B of the clamp 27 or on both side wall portions 27A and 27B.

[0024]

According to the fuel tube coupling device of the present invention, the first engaging projection is formed in the vicinity of the connecting end, and the first engaging projection is located at a position away from the connecting end. The insertion side fuel tube formed with the second engagement protrusion and the insertion side fuel tube is coupled to one end of the insertion side fuel tube, and the insertion side fuel tube is inserted into the other end of the insertion side fuel tube. And a fuel tube connecting connector having an engaging concave portion at a position separated from the engaging nail portion on the side opposite to the connecting end, and a box-shaped internal section having a U-shaped cross section. A holding member for accommodating the connecting portion between the insertion side fuel tube and the fuel tube connecting connector, and the second engaging protrusion of the inserting side fuel tube is provided on one of the opposing side wall portions of the holding member at the periphery thereof. First engaging part A second notch is formed on the other side of the side wall portion facing the side wall portion to form a notch, the engaging recess portion of the fuel tube connecting connector engaging the peripheral edge portion thereof, and at least one of the side wall portions facing each other is provided along the insertion direction. Since the structure is inclined so that the distance between both side wall parts becomes narrower, the distance between the fuel tubes to be connected to each other can be kept constant with a simple structure, and the fuel tubes to each other are surely connected. It has an excellent effect of being able to.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a fuel tube coupling device according to an embodiment of the present invention.

FIG. 2 is an exploded perspective view showing a fuel tube coupling device according to an embodiment of the present invention.

FIG. 3 is a perspective view showing a fuel tank to which a fuel tube coupling device according to an embodiment of the present invention is applied.

FIG. 4 is an exploded perspective view showing a fuel tube coupling device according to another embodiment of the present invention.

FIG. 5 is a sectional view showing a conventional fuel tube coupling device.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 10 Fuel tank 12 Fuel tube (inserted side fuel tube) 14 Floor fuel tube (insertion side fuel tube) 16 1st engaging convex part 18 2nd engaging convex part 20 Fuel tube connection connector 22 Engaging nail part 27 Clamp (holding member) 27A Side wall 27B Side wall 28 Notch 30 Notch

Claims (1)

[Claims] 1. A first engaging convex portion is formed near the connecting end, and a second engaging convex portion is formed at a position separated from the first engaging convex portion on the side opposite to the connecting end. And the insertion side fuel tube, the insertion side fuel tube is coupled to one end of the insertion side fuel tube, and the insertion side fuel tube is inserted to the other end of the insertion side fuel tube and the engagement claw is engaged with the first engagement protrusion. And a fuel tube connecting connector having an engaging recess at a position separated from the engaging claw portion to the side opposite to the connecting end, and a box-shaped box-shaped cross section having the insertion side fuel tube and the inside. A holding member for accommodating a connecting portion with the fuel tube connecting connector; and a second engaging convex portion of the insertion side fuel tube engages with a peripheral edge portion of one of the opposing side wall portions of the holding member. Form the first notch to A second notch with which the engaging recess of the fuel tube connecting connector engages with the peripheral edge of the other side wall portion, and at least one of the opposing side wall portions is formed on both side walls along the insertion direction. A device for connecting a fuel tube, which is inclined so that the distance between the parts is narrowed.