JPH1122885A - Connector - Google Patents

Abstract

PROBLEM TO BE SOLVED: To surely prevent the main body of a connector connecting a hose with a pipe having a radially outwardly projecting part on its outer peripheral surface from being deteriorated by a transferred fluid by enhancing the rigidity and strength of the connector main body at low cost while making it easier to connect and remove the pipe to and from the connector. SOLUTION: A connector C includes a connector main body 10 made of a resin, which has a connection 2 and a storage part 3 both constructed of a metallic rigid inner cylinder 1, and which has an extension 11 extending from the end of the storage part 2 of the rigid inner cylinder 1 while surrounding the outer periphery of the storage part 2, and a clip 15 made of an elastic body having locking claws 17, 17 which project radially inward from the inner peripheral surface of the extension 11 via through holes 12, 12 passing through the inner and outer peripheral faces of the extension 11. In this case, the claws 17 of the clip 15 are moved back and forth with respect to the inside of the extension to enable insertion, locking, and removal of a pipe 26.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a technical field of a connector for connecting a hose for transferring a fluid and a tube having a bulging portion projecting radially outward from an outer peripheral surface thereof in a communicating manner. Belong.

[0002]

2. Description of the Related Art Conventionally, as this kind of connector,
For example, as shown in Japanese Patent Application Laid-Open No. 8-233181, a proximal end has a connecting portion inserted and coupled into a distal end of a hose, while a distal end has a receiving portion for receiving a distal end of a tube. There has been proposed a connector body provided with a resin, having a clip provided on the distal end side of the housing portion of the connector body so as to prevent the distal end of the hose housed in the housing portion from being pulled out. This clip is fitted around the outer periphery on the distal end side of the housing portion, and a fitting portion that is partially cut off in the circumferential direction is provided integrally with the fitting portion and penetrates through the inner and outer peripheral surfaces of the housing portion. An elastic body having a locking claw projecting radially inward from the inner peripheral surface of the housing portion through the hole. When the distal end of the tube is inserted into the housing from the distal end side of the connector body, the clip is pushed outward by the bulging portion of the tube in the housing radial direction. After the tube is inserted, the tube is prevented from being pulled out by the engagement between the bulging portion and the locking claw, while when the tube is removed from the housing portion, the locking claw is formed by expanding the diameter of the fitting portion. Is retracted outward in the radial direction of the housing portion so that the tube can be detached from the connector, so that the tube can be easily inserted and removed.

On the other hand, as shown in, for example, Japanese Patent Application Laid-Open No. Hei 5-231578, two extending portions which are opposed to each other and extend to the front end side of a housing portion of a resin-made connector body are integrally formed. A locking claw that engages with the bulging portion of the tubular body is provided at the distal end of the extending portion, and a spring ring is fitted around the outer periphery of the two extending portions, and the two extending portions are connected to each other by the spring ring. It has been proposed to do so. Further, in this connector, the connection portion and the housing portion are formed of a rigid inner cylinder made of metal or the like, and are integrally formed so that the outer periphery of the rigid inner cylinder is covered by the connector main body. This prevents the transfer fluid flowing in the connector from directly contacting the connector main body, thereby preventing the connector main body from being deteriorated by the fluid, and maintaining the strength of the connector main body while making the extension portion easily bendable. The work of inserting the tube into the housing is facilitated.

[0004]

However, in the latter proposed example (Japanese Patent Application Laid-Open No. Hei 5-231578), since the extending portion is separated in the circumferential direction so as to be deformed in the radial direction, the extension is formed by the spring ring. Even if they are connected to each other, the strength of that part is considerably lower. On the other hand, if the strength is increased, the extension portion becomes difficult to bend, and it becomes difficult to insert the tube into the accommodation portion. In addition, due to the deformation of the extending portion in the radial direction, the adhesiveness between the connector main body and the accommodating portion of the rigid inner cylinder is deteriorated, and the effect of improving the strength of the connector main body by the rigid inner cylinder is hardly obtained. Further, it is difficult to remove the tube from the housing, and in the worst case, the spring ring must be cut with a wire cutter or the like, so that the spring ring cannot be reused. There is room for improvement.

On the other hand, the former proposed example (Japanese Patent Laid-Open No.
In Japanese Patent No. 3181), since the connector main body is formed of an integral resin together with the connecting portion and the housing portion, the connector main body is deteriorated depending on the type of fluid, and the connector main body is repeatedly bent by vibration or the like particularly at a high temperature. When stress is applied, the strength of the connector body may be reduced. Therefore, it is conceivable that the entire connector body is made of metal, but this causes a great increase in cost.

The present invention has been made in view of the above points, and an object of the present invention is to improve the structure of the above-described conventional connector so that connection and disconnection of the tube from the connector can be easily performed. An object of the present invention is to improve the rigidity and strength of a connector main body at a low cost and to reliably prevent the connector main body from being deteriorated by a transfer fluid.

[0007]

In order to achieve the above-mentioned object, according to the present invention, the connecting portion and the accommodating portion are constituted by a rigid inner cylinder, and the outer periphery of the accommodating portion of the rigid inner cylinder is covered. A resin connector main body having an extension extending beyond the tip of the housing portion and into which the bulge of the tube can be inserted, and fitted around the outer periphery of the extension of the connector main body; A clip made of an elastic body having a locking claw that protrudes radially inward from the inner peripheral surface of the extending portion through a through hole that penetrates the inner and outer peripheral surfaces of the protruding portion. By moving the tube forward and backward with respect to the inside of the section, insertion, removal and removal of the tube can be performed.

More specifically, the invention of claim 1 is directed to a connector for connecting a hose and a tube having a bulging portion protruding radially outward on an outer peripheral surface thereof in a communicating manner.

A rigid inner cylindrical body having a connecting portion inserted at the base end thereof into the distal end portion of the hose, and having a receiving portion for receiving the distal end portion of the tube at the distal end portion;
An extension is provided so as to cover the outer periphery of the accommodation portion of the rigid inner cylindrical body, extends from the tip of the accommodation portion, and has an extension portion into which the bulge portion of the tube body can be inserted inside. A resin connector body provided with a through hole penetrating the inner and outer peripheral surfaces of the portion,
Fitted around the outer periphery of the extension of the connector body,
A fitting portion having a part cut off in the circumferential direction, and a locking claw provided integrally with the fitting portion and protruding radially inward from the inner peripheral surface of the extension portion through the through hole. A clip made of an elastic body, wherein the clip is configured such that when the distal end of the tubular body is inserted into the housing portion from the distal end side of the rigid inner cylindrical body, the locking claw is extended by the bulging portion of the tubular body. The insertion of the tube is made possible by being pushed outward in the radial direction to expand the fitting portion, and after the tube is inserted, the tube is prevented from being removed by the engagement between the bulging portion and the locking claw. When the tube is pulled out of the housing portion, the engaging claw is retracted to the outside in the radial direction of the extending portion by expanding the diameter of the fitting portion to release the engagement with the bulging portion of the tube, thereby housing the tube. It is assumed that it is configured to be able to be extracted from the section.

[0010] With the above structure, the tube is easily prevented from being pulled out only by inserting the tube into the accommodating portion, and the locking claw and the bulging portion of the tube are formed by expanding the diameter of the fitting portion of the clip. And the tube body can be easily pulled out from the housing portion. In addition, the extension is connected in the circumferential direction, and when inserting and extracting the tube, only the clip is not deformed and the extension is not deformed. Therefore, even if the extended portion extends toward the distal end side of the rigid inner cylinder body, the strength of the entire connector body including the extended portion can be maintained. Then, even if bending stress is repeatedly applied to the connector main body due to vibration or the like at a high temperature, the rigid inner cylinder can prevent the strength of the connector main body from being reduced. Furthermore, since the fluid flowing in the connector does not come into direct contact with the connector main body, the rigid inner cylinder is formed of metal or a material having resistance to solvents and chemicals against the fluid, so that the connector by the fluid can be used. The deterioration of the main body can be prevented. Therefore, the connector body does not need to be made of a material having high strength and excellent in solvent resistance and the like, similarly to the rigid inner cylinder body. Therefore,
The durability of the entire connector can be improved while reducing costs and facilitating connection and disconnection of the tube from the connector.

According to a second aspect of the present invention, in the first aspect of the present invention, the fitting portion of the clip is movable in the axial direction with respect to the extending portion of the connector body, and the fitting portion of the clip is rigid. It is assumed that a lock means is provided for preventing the fitting portion from expanding in diameter when moved to the side opposite to the base end of the inner cylinder.

According to the present invention, when the tube moves in the direction opposite to the base end of the rigid inner cylinder, that is, in the direction in which the tube comes off, by receiving the pressure of the internal transfer fluid or receiving some external force. The clip is also pushed by the bulging portion of the tubular body and moves in the same direction as the tubular body. At this time, since the expansion of the fitting portion is prevented by the locking means, the clip is restricted by the force acting on the tubular body. However, the engagement between the locking claw of the clip and the bulging portion of the tube is maintained, and the tube can be reliably prevented from falling out of the housing portion. Therefore, it is possible to more reliably prevent the tubular body from coming off.

According to a third aspect of the present invention, in the second aspect of the invention, the locking means is provided on a side of the locking claw opposite to the base end of the rigid inner cylinder, and the clip is opposite to the base end of the rigid inner cylinder. It is assumed that the lock claw is engaged with the periphery of the through hole on the inner peripheral surface of the extension portion when moved to the side.

Accordingly, the locking claw engages around the through hole on the inner peripheral surface of the extension portion, so that the locking claw cannot be retracted, thereby preventing the fitting portion from expanding in diameter. Therefore, a specific configuration of a simple locking means can be easily obtained.

According to a fourth aspect of the present invention, in the second or third aspect, an urging means for urging the clip toward a side opposite to the base end of the rigid inner cylinder is provided.

Thus, the clip can be prevented from wobbling in the axial direction with respect to the extending portion, and
Since the clip is urged to the side where the diameter of the fitting portion is prevented from being expanded, even if a force is applied to the clip to expand the size of the fitting portion for some reason, the pipe body is securely housed. Can be prevented from falling out. Therefore, the engagement between the bulging portion of the tube and the locking claw can be ensured while preventing the play of the clip.

According to a fifth aspect of the present invention, in any one of the first to fourth aspects of the present invention, the connector body is provided with the connecting portion and the hose in a state where the connecting portion of the rigid inner cylinder is inserted and coupled into the distal end portion of the hose. And a hose compression coupling portion that compresses and deforms the hose distal end portion in the radial direction between the hose distal end portion and the connection portion so as to integrally connect the hose.

By doing so, the hose and the connection portion are firmly connected by the hose compression connection portion, so that the hose and the connector can be integrated with each other in a securely sealed state without using another clamping means or the like. Can be
In addition, the integration facilitates handling of the connector and the hose. Therefore, the connection between the connector and the hose can be ensured while simplifying the handling.

According to a sixth aspect of the present invention, in any one of the first to fifth aspects of the present invention, the rigid inner cylinder is formed of a metal, and the rigid inner cylinder is provided in the housing portion with the distal end of the tube. It is assumed that a seal portion for sealing the gap is formed, and at least one seal ring made of a solvent-resistant material is provided in the seal portion.

By doing so, the strength and rigidity of the connector can be reliably improved by reducing the thickness in the radial direction of the connector, and the coefficient of friction when inserting the connecting portion into the hose is reduced. Can be facilitated. Further, even if the connector is connected to a fuel hose and the internal transfer fluid is alcohol gasoline mixed with methanol or ethanol, the rigid inner cylinder does not deteriorate due to the gasoline. And, by making the seal ring a material having excellent solvent resistance and chemical resistance such as, for example, fluorine rubber or fluorosilicone rubber,
The deterioration of the seal ring can also be prevented. Therefore, it is possible to make the connector optimal as a connector to be connected to a fuel hose for alcohol gasoline while miniaturizing the connector.

According to a seventh aspect of the present invention, in any one of the first to sixth aspects of the present invention, the rigid inner cylinder is formed of a metal, and a plurality of radially outwardly projecting portions are formed at the connecting portions of the rigid inner cylinder. Are provided in a state where they are arranged in the axial direction of the connecting portion.

This makes it easy to insert and connect the connecting portion to the hose, while preventing the hose from coming off the connecting portion by the protruding portion. In particular, in the case of a resin hose, even if the connector body does not have the hose compression connection portion as in the invention of claim 5, the connection between the hose and the connection portion becomes reliable,
Separate components such as hose clips are not required. Further, the protruding portion can be easily formed by pressing or the like. Therefore, the connection between the connector and the hose can be easily and reliably performed with a simple configuration.

[0023]

BEST MODE FOR CARRYING OUT THE INVENTION

(Embodiment 1) FIGS. 1 to 4 show a connector C according to Embodiment 1 of the present invention. The connector C has a rubber fuel hose 25 and a bulging portion projecting radially outward on an outer peripheral surface. The pipe 26 is connected in a communicating manner with the tube 26 having the pipe 26a. The connector C is connected to a base end (the left end in FIG. 1) of the connecting portion 2 which is inserted and coupled into the distal end of the fuel hose 25.
On the other hand, a housing portion 3 for housing the front end portion of the tubular body 26 concentrically with the connection portion 2 at a front end portion (right end portion in the figure).
And a substantially cylindrical rigid inner cylinder 1 made of metal having
The outer diameter of the connection portion 2 of the rigid inner cylinder 1 is set to be larger than the inner diameter of the fuel hose 25 except for the vicinity of the base end thereof,
The fuel hose 25 is press-fitted into the fuel hose 25 to be inserted and connected. In the vicinity of the base end of the connecting portion 2, a tapered surface 2a whose diameter decreases toward the base end is provided.
Two projecting portions 2b, 2b projecting outward in the radial direction are arranged in the axial direction substantially at the central portion in the axial direction on the outer peripheral surface and near the opposite side of the base end of the tapered surface 2a. It is provided in.

The inner diameter of the proximal end of the housing portion 3 of the rigid inner cylindrical body 1 is set slightly larger than the outer diameter of the distal end of the tubular body 26, and is located closer to the distal end than the proximal end. The seal portion 4 has an inner diameter larger than that of the base end. The seal portion 4 seals between the housing portion 3 and the distal end portion of the tube 26. In the seal portion 4, two O-rings (seal rings) 7 made of fluorine rubber having solvent resistance, 7 and two spacer rings 8, 8 also made of fluorine resin and having solvent resistance are alternately provided in the axial direction. Each of the O-rings 7 and each of the spacer rings 8 are formed between the distal end 1a of the rigid inner cylinder 1 that is bent inward in the radial direction and the inner surface of the step 4a on the base end of the seal portion 4. It is fixed so that it cannot move in the axial direction. Here, the fluoro rubber used for each of the O-rings 7 is mainly composed of VDF (vinylidene fluoride).
Binary or ternary containing HFP (hexafluoropropylene), TFE (tetrafluoroethylene), PFP (pentafluoropropylene), PFMVE (perfluoromethylvinyl ether), CTFE (chlorotrifluoroethylene) or the like as its copolymerization component VDF-HFP
System, VDF-HFP-TFE system, VDF-PFP system, V
DF-PFP-TFE system, VDF-PFMVE-TFE
System, VDF-CTFE fluoro rubber, P / TFE
(Propylene / tetrafluoroethylene) fluorine rubber or the like may be used. Examples of the fluororesin used for each of the spacer rings 8 include PTFE (polytetrafluoroethylene), FEP (tetrafluoroethylene / hexafluoropropylene copolymer), and PFA (tetrafluoroethylene / perfluoroalkylvinyl ether copolymer). ), PCTFE (polychlorotrifluoroethylene), PVDF (polyvinylidene fluoride), ETFE
(Ethylene / tetrafluoroethylene copolymer), EC
TFE (ethylene / chlorotrifluoroethylene copolymer) or the like may be used.

A resin (for example, a polyamide resin such as 6 nylon, 66 nylon, 11 nylon or 12 nylon or a polyamide resin mixed with glass fiber) is formed around the outer periphery of the housing portion 3 of the rigid inner cylinder 1. The connector body 10 is formed integrally with the housing 3 so as to cover the housing 3. The connector body 10 has an extension 11 extending beyond the tip of the housing 3, and the outer diameter of the extension 11 is smaller than the portion covering the housing 3, and a step surface is formed at the boundary. 11a is formed. On the other hand, the inside of the extending portion 11 has an inner diameter slightly larger than the outer diameter of the sealing portion 4 of the rigid inner cylinder 1 so that the bulging portion 26a of the tube 26 can be inserted. The swelling portion 26a of the tube 26 abuts on the distal end 1a of the rigid inner cylinder 1 bent inward in the radial direction, so that the tube 26 cannot be inserted any further. In other words, the end of the tube 26 is completely housed in the housing part 3 by the contact (the state shown by the two-dot chain line in the figure).

The extension portion 11 of the connector body 10 includes
Two substantially rectangular through holes 12 penetrating the inner and outer peripheral surfaces thereof,
12 are provided facing each other. Also, this extension portion 11
A clip 15 made of the same polyamide resin as that of the connector body 10 is fitted around the outer periphery of the connector body 10. That is, the clip 15 has a fitting portion 16 fitted around the outer periphery of the extension portion 11 and partially cut off in the circumferential direction. The clip 15 has a larger diameter when a force is applied to both separated ends of the fitting portion 16 in a direction in which the ends are separated from each other, and when the force is released, the original diameter is reduced. The elastic body is returned to. This fitting part 1
The inner diameter of the extension 6 is set slightly smaller than the outer diameter of the extension 11, and the inner diameter of the extension 6 is increased in the fitted state, and the inner peripheral surface of the extension 11 is reduced by the restoring force in the diameter reducing direction. It is fitted so as to be substantially in close contact with the outer peripheral surface.

On the inner surface of the fitting portion 16 of the clip 15, two locking claws 17, 17 projecting radially inward from the inner peripheral surface of the extending portion 11 through the respective through holes 12 respectively.
Are formed integrally with the fitting portion 16 to face each other. Each of the locking claws 17 is provided at a position rotated about 90 degrees in the circumferential direction from the circumferentially separated end of the fitting portion 16. The distal end surface of each locking claw 17 is a tapered surface 17a in which the amount of protrusion of each locking claw 17 is greater on the distal end side than on the base end side of the rigid inner cylinder 1. Each tapered surface 1
7a is a bulging portion 26a of the tubular body 26 when the distal end of the tubular body 26 is inserted into the housing portion 3 from the distal end side of the rigid inner cylindrical body 1.
The tapered surface 17a of each locking claw 17 is pushed outward in the radial direction of the extending portion 11 by the bulging portion 26a, and the fitting portion 16 is expanded in diameter.
6 can be inserted. In addition, tube 2
6 is completely inserted into the housing portion 3, the fitting portion 16 is reduced in diameter, and the respective locking claws 17 protrude inward in the radial direction. End face and bulge 26a
The tube body 26 is prevented from being pulled out by engagement with.

An operating portion 16a is formed at one of the separated ends of the fitting portion 16 so as to protrude outward in the radial direction, and the operating portion 16a separates the separated ends from each other (in FIG. The diameter of the fitting portion 16 can be increased by applying a force in the (circumferential direction). By the operation of increasing the diameter of the operating portion 16a, the locking claws 17 are retracted to the outside in the radial direction of the extending portion 11 and the engagement with the bulging portion 26a of the tubular body 26 is released, so that the tubular body 26 is accommodated. 3 can be extracted. The locking claw 17 on the side close to the separation end provided with the operating portion 16a is also moved in the operating direction after its tip comes out of the extending portion 11 by the diameter expanding operation of the operating portion 16a. In order to make the movement smooth, the outer peripheral surface of the extension portion 11 of the connector body 10 faces the through hole 12 on the side of the through hole 12 corresponding to the locking claw 17 in the operation direction. An inclined surface 11b having a smaller diameter is provided (see FIGS. 3 and 4).

The axial length of the extension 11 in each through hole 12 of the extension 11 of the connector body 10 is
5 is larger than the axial length of the extending portion 11 in each of the locking claws 17, whereby the fitting portion 16 of the clip 15 is
Is movable in the axial direction with respect to the extending portion 11 of the connector body 10. Then, the fitting portion 16 of the clip 15 is opposite to the base end of the rigid inner cylinder 1, that is, the tube 2.
Locking pawls 18, 18 serving as locking means for preventing the fitting section 16 from expanding in diameter when the 6 moves out of the housing section 3 are rigid inner cylinders at the distal ends of the locking pawls 17, 17. It is provided on the end face on the opposite side from the base end of the body 1. That is, each of the lock claws 18 is extended when the clip 15 moves to the side opposite to the base end of the rigid inner cylinder 1.
The inner peripheral surface of the inner peripheral surface of each of the through holes 12 is engaged with the edge of the rigid inner cylindrical body 1 on the side opposite to the base end.
Cannot be retracted to the outside in the radial direction of the extension portion 11 and the fitting portion 1
6 is prevented from expanding. On the other hand, when the clip 15 moves to the proximal end side of the rigid inner cylindrical body 1, the engagement between each lock claw 18 and the inner peripheral surface of the extension portion 11 is released, and each locking claw 17 becomes the radius of the extension portion 11. It can be retracted outward in the direction.

On the base end side of the rigid inner cylinder 1 at the fitting portion 16 of the clip 15, the clip 15 is opposite to the proximal end of the rigid inner cylinder 1 at a position corresponding to each locking claw 17. Urging portions 19, 19 as urging means for urging the side.
Are respectively provided in a substantially semicircular shape. That is, each of the urging portions 19 has a distal end surface which is connected to the connector main body 10.
Abuts against the step surface 11a in the outer peripheral portion of the rigid inner cylinder 1
Is formed thin so as to be deformed to the side opposite to the base end of the rigid inner cylindrical body 1 due to this deformation.

A method of manufacturing the connector C having the above configuration will be described. First, after two O-rings 7 and two spacer rings 8 are alternately provided in the seal portion 4 in the housing portion 3 of the rigid inner cylinder 1, the distal end 1a of the rigid inner cylinder 1 is bent. By tightening, the O-rings 7 and the spacer rings 8 are fixed.

Next, the rigid inner cylinder 1 is placed in an injection mold, and the connector body 10 is injection-molded integrally with the rigid inner cylinder 1. Then, the clip 1 previously molded with resin
The diameter of the fitting portion 16 is increased so that the tip diameters of the both locking claws 17 are larger than the outer diameter of the extending portion 11 of the connector body 10 and fitted to the extending portion 11. At this time, each of the locking claws 17 is made to protrude radially inward from the inner peripheral surface of the extending portion 11 through each through hole 12. From the above,
The manufacture of the connector C ends.

Next, a method for connecting the fuel hose 25 and the pipe 26 using the connector C will be described. First, the connection portion 2 of the rigid inner cylinder 1 is inserted and connected by press-fitting into the distal end portion of the fuel hose 25. At this time, since the tapered surface 2a is formed at the base end of the connection portion 2 and the connection portion 2 is formed of metal, the fuel hose 25
Has a relatively low coefficient of friction and can be easily inserted. On the other hand, after the connecting portion 2 is inserted and coupled into the fuel hose 25, the projecting portions 2b,
The fuel hose 25 is not easily detached from the connection part 2 by 2b.

Subsequently, the distal end of the tube 26 is connected to the rigid inner cylinder 1.
From the front end side of the housing 3. At the time of this insertion, the tapered surface 17a which is the tip surface of each locking claw 17 of the clip 15
The bulging portion 26a of the tube body 26 abuts against the bulging portion 26a.
As a result, the tapered surface 17a of each locking claw 17 is pushed outward in the radial direction of the extending portion 11, and the fitting portion 16 expands in diameter. As a result, the tube 26 can be inserted, and the bulging portion 26a comes into contact with the radially inwardly bent distal end of the rigid inner cylindrical body 1 so that the distal end of the tube 26 is completely contained in the housing portion. 3. At this time, the fitting portion 16 of the clip 15 whose diameter has been increased is reduced in diameter and returns to the original state, and the engagement between the base end side end surface of the rigid inner cylinder 1 and the bulging portion 26a in each locking claw 17 is performed. As a result, the tube 26 is prevented from falling off. As a result, the tube 26 is easily prevented from being pulled out simply by inserting the tube 26 into the housing portion 3, and the insertion operation can be simplified.

Even if a force is applied to the tube 26 to pull the tube 26 out of the housing 3, not only the engaging claws 17 and the bulging portion 26a are engaged but also the clip 15 is rigid. Since the locking claw 18 provided on each locking claw 17 always moves to the opposite side to the base end of the inner cylinder 1, the base end of the rigid inner cylinder 1 around each through hole 12 on the inner peripheral surface of the extension 11. And the locking claws 17 cannot be retracted to the outside in the radial direction of the extending portion 11. For this reason, it is possible to reliably prevent the tube 26 from falling out of the housing portion 3 irrespective of the force acting on the tube 26. Further, even when the tube 26 moves in the direction in which the tube 26 comes off due to the internal pressure of the fuel during the transfer of the fuel, the same holds true, and the tube 26 can be reliably prevented from being pulled out. Furthermore, since the urging portion 19 for urging the clip 15 to the side opposite to the base end of the rigid inner cylinder 1 is formed in the fitting portion 16 of the clip 15, the clip 15 is It can prevent wobbling in the axial direction,
The clip 15 is always located on the side where the expansion of the fitting portion 16 is prevented, and even if a force for expanding the fitting portion 16 acts on the clip 15 for some reason, the tube 26
Can be reliably prevented from falling out of the storage section 3. Therefore, while preventing the backlash of the clip 15,
6, the engagement between the bulging portion 26a and the locking claw 17 can be reliably performed.

Next, when pulling out the tube 26 from the connector C, while pushing the clip 15 toward the base end of the rigid inner cylinder 1, the operating portion 1 at one of the separated ends of the fitting portion 16 is pressed.
6a, a force is applied in a direction in which the two separated ends are separated from each other so that the fitting portion 1
6 is expanded in diameter. With this, each locking claw 1 of the clip 15
7 is retracted radially outward of the extending portion 11, and the engagement between each locking claw 17 and the bulging portion 26 a of the tube 26 is released. As a result, the distal end portion of the tube 26 can be easily pulled out of the housing 3.

Therefore, in the above embodiment, the connecting portion 2
And the housing portion 3 is formed of a rigid inner cylindrical body 1 made of metal, and covers the outer periphery of the housing portion 3 of the rigid inner cylindrical body 1 so as to cover the housing portion 3.
Main body 1 made of resin and having an extended portion 11 which extends beyond the tip of the tube and into which the bulged portion 26a of the tube 26 can be inserted.
0, a fitting portion 16 fitted around the outer periphery of the extension portion 11 of the connector body 10, and a through hole provided integrally with the fitting portion 16 and penetrating the inner and outer peripheral surfaces of the extension portion 11. A clip 15 made of an elastic body having a locking claw 17 protruding radially inward from the inner peripheral surface of the extension portion 11 through the hole 12
And the tube 26 can be easily inserted and removed. Further, the extending portion 11 is connected in the circumferential direction, and the clip 1 is inserted when the tube 26 is inserted and withdrawn.
5 is not deformed and the extending portion 11 itself is not deformed. Therefore, even if the extending portion 11 protrudes from the rigid inner cylinder 1, the adhesion of the rigid inner cylinder 1 in the housing portion 3 is excellent. Thus, the strength of the entire connector main body 10 including the extension portion 11 can be maintained. Then, even if bending stress is repeatedly applied to the connector main body 10 due to vibration or the like at a high temperature, the rigid inner cylinder 1 can prevent the strength of the connector main body 10 from being reduced. Further, since the transferred fuel does not directly contact the connector main body 10, deterioration of the connector main body 10 due to the fuel can be prevented.
For this reason, the connector body 10 does not need to be made of metal or the like having high strength and excellent in solvent resistance and the like, similarly to the rigid inner cylinder 1. Therefore, the durability of the connector C as a whole can be improved at low cost while facilitating connection and detachment of the tube body 26 from and to the connector C.

Further, since the rigid inner cylinder 1 is made of metal, the strength and rigidity of the connector C can be reliably improved by reducing the radial thickness of the connector C, and methanol or ethanol can be used as the fuel. Even with mixed alcohol gasoline, the rigid inner cylinder 1 does not deteriorate with the gasoline. Further, since each O-ring 7 and each spacer ring 8 provided in the seal portion 4 are respectively formed of fluoro rubber and fluoro resin having excellent solvent resistance and chemical resistance, even if the fuel is alcohol gasoline, Also, deterioration of the seal ring can be prevented. Therefore, the connector C can be made optimal as the connector C for connecting the fuel hose 25 and the pipe 26 for transferring alcohol gasoline while reducing the size of the connector C.

(Embodiment 2) FIGS. 5 and 6 show Embodiment 2 of the present invention. In the following embodiments, the same parts as those in FIGS. Are omitted), a clip 15 fitted to the connector body 10
Is formed of a metal plate having a spring property unlike the first embodiment.

That is, in this embodiment, the clip 1
The fitting portion 16 is formed by forming a substantially rectangular plate into a circular shape, and two locking claws 17 are provided at the proximal end of the rigid inner cylinder 1 at the fitting portion 16. Through holes 12, 12
And are integrally formed so as to protrude inward in the radial direction from the inner peripheral surface of the extension portion 11 through the respective portions. Each locking claw 17
Is bent toward the base end side of the rigid inner cylinder 1, and a tapered surface 17 a is formed on a side of the distal end of each locking claw 17 opposite to the base end of the rigid inner cylinder 1. Thus, similarly to the first embodiment, when the distal end portion of the tubular body 26 is inserted into the housing portion 3 from the distal end side of the rigid inner cylindrical body 1, the swelling portion 26 a of the tubular body 26 causes each of the locking claws 17. Tapered surface 17
a is pushed outward in the radial direction of the extending portion 11, and the fitting portion 16 expands in diameter, thereby enabling the insertion of the tubular body 26 and the tubular body 26.
Is completely inserted into the housing portion 3, the fitting portion 16 is reduced in diameter, and each locking claw 17 projects radially inward.
The tube 26 is prevented from being pulled out by the engagement between the distal end portion 7 and the bulging portion 26a. An operating portion 16a that is bent outward in the radial direction and protrudes is formed at one of the separated ends of the fitting portion 16 so that the fitting portion 16 can be expanded in diameter. .

In this embodiment, when the fitting portion 16 of the clip 15 moves to the side opposite to the base end of the rigid inner cylinder 1, the fitting portion 16 is prevented from expanding in diameter. No lock means such as the lock claw 18 is provided. Further, there is no urging means for urging the clip 15 to the side opposite to the base end of the rigid inner cylinder 1.

Therefore, also in the second embodiment,
As in the first embodiment, the insertion and removal of the tube 26 can be easily performed. Further, even if there is no lock means for preventing the fitting portion 16 from expanding in diameter when the fitting portion 16 of the clip 15 moves to the side opposite to the base end of the rigid inner cylinder 1, each member is not required. It is possible to prevent the tapered surface 17a of each locking claw 17 from being pushed outward in the radial direction of the extending portion 11 only by the engagement between the distal end portion of the locking claw 17 and the bulging portion 26a. The body 26 can be retained. Further, since the clip 15 is made of metal, the size in the radial direction can be made smaller than that of the clip 15 made of resin while maintaining strength.

(Embodiment 3) FIG. 7 shows Embodiment 3 of the present invention.
The shape of each protruding portion 2b formed on the outer peripheral surface of the connecting portion 2 of the rigid inner cylinder 1 is different from that of the first embodiment.

That is, in this embodiment, three protruding portions 2b, 2b,... Protruding outward in the radial direction are provided on the connecting portion 2 of the rigid inner cylindrical body 1 so as to be arranged in the axial direction of the connecting portion 2. And two projecting portions 2 opposite to the base end of the connecting portion 2.
b, 2b are the protruding portions 2b located closest to the base end.
As in the case of the tapered surface 2a which is continuous with the base, the diameter is gradually reduced toward the base end side. On the other hand, the side opposite to the base end of each projection 2b is formed such that the diameter decreases sharply toward the side opposite to the base end. That is,
The connecting portion 2 is formed in a bamboo shoot shape by each protruding portion 2b whose base end side has a gentler inclined surface than the opposite side.

The most proximal protruding portion 2b of the connecting portion 2
Is provided with a seal recess 2c that is recessed inward in the radial direction. When the connecting portion 2 is inserted and coupled to the fuel hose 25, an O-ring 28 is fitted into the seal recess 2c, and the fuel hose 25 and the connecting portion 2 are connected to each other. The transfer fuel is prevented from leaking from the gap.

The extension 11 of the connector body 10 has
The same resin clip 15 as in the first embodiment is fitted.

Therefore, in the third embodiment, since the connecting portion 2 is formed in a bamboo shoot shape, the connecting portion 2 can be easily inserted into the fuel hose 25. It is harder to come off than one. In particular, if the fuel hose 25 is made of resin, the connection between the two can be ensured without using a separate component such as a hose clip. In addition, each protrusion 2b
Can be easily formed by pressing or the like. Therefore, the connection between the connecting portion 2 and the fuel hose 25 can be easily performed with a simple configuration, and the connection can be further ensured.

In the third embodiment, the fuel hose 25
A seal concave portion 2c for fitting the O-ring 28 between the connecting portion 2 and the connecting portion 2 is formed. However, the O-ring 28 is not always necessary, and the seal concave portion 2c and the O-ring 28 are not provided. The connection portion 2 and the fuel hose 25 may be connected.

(Embodiment 4) FIG. 8 shows Embodiment 4 of the present invention.
And the connector C and the fuel hose 25 are integrally connected.

That is, in this embodiment, the connector main body 10 is the rigid inner cylindrical body 1 of the connector main body 10.
The connecting portion 2 of the rigid inner cylinder 1 is inserted into the distal end portion of the fuel hose 25 at the proximal end thereof so that the connecting portion 2 and the fuel hose 25 are integrally connected. A hose compression coupling portion 13 is provided for radially compressing and deforming the portion between the connecting portion 2 and the connecting portion 2. That is, when the connector body 10 is injection-molded, the hose compression coupling portion 13 causes the distal end of the fuel hose 25 to move in the radial direction with respect to the outer peripheral surface of the connection portion 2 of the rigid inner cylinder 1 due to the resin pressure. It is in a state of being caulked by being compressed and deformed inward.

The main part 25a of the fuel hose 25 is made of synthetic rubber, and a reinforcing layer 25b is embedded in the main part 25a. A thin film layer 25c made of fluororesin is formed in the innermost layer constituting the inner peripheral surface of the fuel hose 25. Here, as the synthetic rubber used for the main portion 25a, ECD (ethylene oxide / epichlorohydrin copolymer), CHR (epichlorohydrin rubber), NBR (acrylonitrile butadiene rubber), AR (acryl rubber), AR / FKM (acryl rubber) / Fluorine rubber blend) or CSM (chlorosulfonated polyethylene rubber). The fluororesin used for the thin film layer 25c may be selected from the same fluororesins used for the spacer rings 8 described in the first embodiment.

The extension 11 of the connector body 10 has
The same resin clip 15 as in the first embodiment is fitted. The connecting portion 2 of the rigid inner cylinder 1 is formed with three projecting portions 2b, 2b,... Having the same shape as in the first embodiment.

In order to form the connector body 10 of the connector C having the above-described configuration, first, the connection portion 2 of the rigid inner cylinder 1 is inserted and connected by press-fitting into the tip of the fuel hose 25. Then, in this state, the rigid inner cylinder 1 and the fuel hose 25 are put into an injection molding die and injection molded at a predetermined resin pressure. As a result, the fuel hose 25 is compressed radially inward by the resin pressure and caulked. The fuel hose 25 is compressed with the inner peripheral surface of the fuel hose 25 pressed against the outer peripheral surface of the connection portion 2 of the rigid inner cylinder 1. The connector main body 10 combined with the above is formed. The connector C is completed by fitting the fitting portion 16 of the clip 15 to the extension portion 11 of the connector body 10.

Therefore, in the fourth embodiment, the connector body 10 compresses and deforms the distal end of the fuel hose 25 in the radial direction between the connecting portion 2 and the connecting portion 2 so that the connecting portion 2 and the fuel hose 25 are integrally connected. The fuel hose 25 and the connecting portion 2 are firmly connected to each other by the hose compression connecting portion 13 so that the fuel can be securely sealed without using other clamping means or the like. The hose 25 and the connector C can be integrated. In addition, this integration simplifies handling of the connector C and the fuel hose 25. Therefore, the connector C and the fuel hose 25 can be easily handled and the connection thereof can be secured.

Further, since the thin film layer 25c on the inner peripheral surface of the fuel hose 25 is made of the same fluororesin as the spacer rings 8, even if the transfer fuel is alcohol gasoline, not only the connector C but also the fuel hose 25 can be surely prevented.

In the fourth embodiment, each of the protrusions 2b provided on the outer peripheral surface of the connection portion 2 of the rigid inner cylinder 1 is used.
Although the shape is the same as that of the third embodiment, the present invention can be applied to the same shape as the third embodiment.

In the third and fourth embodiments, the clip 15 is made of the same resin as in the first embodiment, but may be made of a metal as in the second embodiment.

Further, in each of the first to fourth embodiments, the rigid inner cylinder 1 is formed of a metal. However, the present invention is not limited to this. The rigid inner cylinder 1 has a predetermined rigidity and has a solvent resistance and a chemical resistance. If so, for example, it may be formed of a synthetic resin.

The O-rings 7 and the spacer rings 8 are made of fluororubber and fluororesin, respectively. However, if the O-rings 7 and fluororesin are made of a solvent-resistant material such as fluorosilicone and are not deteriorated by alcohol gasoline, etc. Any material may be used.

In each of the first to fourth embodiments, the connector C connects the fuel hose 25 and the pipe 26. However, the present invention is not limited to this, and each O-ring 7, each spacer ring 8, and the rigid inner cylinder may be connected. The present invention can be applied to uses other than the fuel hose 25 by appropriately changing the material of the body 1 by considering the properties of the fluid.

[0061]

As described above, according to the first aspect of the present invention, there is provided a connector for connecting a hose and a tube having a bulging portion protruding radially outward on an outer peripheral surface thereof in a communicating manner. A resin connector main body comprising a rigid inner cylinder body and a rigid inner cylinder body, the resin main body having an extending portion covering the outer periphery of the accommodation section of the rigid inner cylinder body and extending from the tip of the accommodation section; A clip which is fitted around the outer periphery of the extending portion and has an engaging claw which protrudes radially inward from the inner peripheral surface of the extending portion through a through hole passing through the inner and outer peripheral surfaces of the extending portion. By moving the locking claw of the clip forward and backward with respect to the inside of the extending portion, it is possible to insert, prevent, and remove the tube, thereby reducing the cost and reducing the length of the tube. The connector can be easily connected to and disconnected from the connector. It can be improved as a whole durability data.

According to the second aspect of the present invention, the fitting portion of the clip is movable in the axial direction with respect to the extending portion of the connector main body, and the fitting portion of the clip is connected to the base end of the rigid inner cylinder. By providing the locking means for preventing the fitting portion from expanding in diameter when it moves to the opposite side, it is possible to further ensure the prevention of the removal of the tube.

According to the third aspect of the present invention, the locking means
A locking claw provided on the locking claw on a side opposite to the base end of the rigid inner cylinder, and engaged around the through hole in the inner peripheral surface of the extension when the clip moves to a side opposite to the base end of the rigid inner cylinder. As a result, a specific configuration of a simple locking means can be easily obtained.

According to the fourth aspect of the present invention, the urging means for urging the clip toward the side opposite to the base end of the rigid inner cylinder is provided, so that the clip is prevented from rattling and the bulging portion of the tube body is prevented. And the engaging claw can be reliably engaged.

According to the fifth aspect of the present invention, the hose end portion is connected to the connector body such that the connection portion and the hose are integrally connected to each other with the connection portion of the rigid inner cylindrical body being inserted and connected into the front end portion of the hose. Is provided with a hose compression coupling portion for compressively deforming the connector and the hose in the radial direction, so that the handling of the connector and the hose can be simplified and the coupling can be reliably performed.

According to the sixth aspect of the present invention, the rigid inner cylindrical body is formed of metal, and a sealing portion for sealing between the rigid inner cylindrical body and the distal end of the tubular body is formed. By arranging at least one seal ring made of a solvent-resistant material in the section, the connector can be downsized and optimized as a connector to be connected to a fuel hose for alcohol gasoline.

According to the seventh aspect of the invention, the rigid inner cylinder is formed of metal, and a plurality of projections projecting outward in the radial direction are arranged in the connecting portion of the rigid inner cylinder in the axial direction of the connecting portion. By providing the connector in a state where the connector and the hose are provided, it is possible to easily and reliably connect the connector and the hose with a simple configuration.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a connector according to Embodiment 1 of the present invention.

FIG. 2 is a diagram showing an arrow II in FIG. 1;

FIG. 3 is a sectional view taken along line III-III of FIG.

FIG. 4 is a perspective view of the connector body and the clip showing a state before the clip is fitted.

FIG. 5 is a cross-sectional view illustrating a main part of a connector according to a second embodiment.

FIG. 6 is a perspective view showing a clip according to a second embodiment.

FIG. 7 is a view corresponding to FIG. 1 showing a third embodiment.

FIG. 8 is a view corresponding to FIG. 1 showing a fourth embodiment.

[Explanation of symbols]

 C Connector 1 Rigid inner cylinder 2 Connection 2b Projection 3 Housing 4 Seal 7 O-ring (seal ring) 10 Connector body 11 Extension 12 Through hole 13 Hose compression coupling 15 Clip 16 Fitting 17 Lock Claw 18 Lock claw (locking means) 19 Biasing part (biasing means) 25 Fuel hose 26 Tubular body 26a Swelling part

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Kenji Tozaki 1 Hiriki, Haruki, Togo-cho, Aichi-gun, Aichi Prefecture Inside Togo Works Co., Ltd. (72) Inventor Minoru Kaneko 1-Hiruki, Haruki, Togo-cho, Aichi-gun, Aichi Inside Togo Mfg. Co., Ltd. (72) Inventor Masatoshi Harada 1 Tomicho, Haruki, Ogo-cho, Togo-cho, Aichi-gun, Aichi Prefecture Inside Togo Mfg. Co., Ltd.

Claims (7)

[Claims] 1. A connector for connecting a hose and a tube having a bulging portion protruding radially outward on an outer peripheral surface thereof in a communicating manner, wherein the connector is inserted into a base end portion of the hose and inserted into a distal end portion of the hose. A rigid inner cylinder body having a housing portion for accommodating the distal end portion of the tubular body at the distal end portion, and a housing provided to cover the outer periphery of the housing portion of the rigid inner cylinder body; A resin connector body having an extension that extends beyond the tip of the portion and into which the bulge portion of the tube body can be inserted, and a through hole that penetrates the inner and outer peripheral surfaces in the extension portion; Is fitted around the outer periphery of the extension of the connector body,
A fitting portion having a part cut off in the circumferential direction, and a locking claw provided integrally with the fitting portion and protruding radially inward from the inner peripheral surface of the extension portion through the through hole. A clip made of an elastic body, wherein the clip is configured such that when the distal end of the tubular body is inserted into the housing portion from the distal end side of the rigid inner cylindrical body, the locking claw is extended by the bulging portion of the tubular body. The insertion of the tube is made possible by being pushed outward in the radial direction to expand the fitting portion, and after the tube is inserted, the tube is prevented from being removed by the engagement between the bulging portion and the locking claw. When the tube is pulled out of the housing portion, the engaging claw is retracted to the outside in the radial direction of the extending portion by expanding the diameter of the fitting portion to release the engagement with the bulging portion of the tube, thereby housing the tube. A connector configured to be able to be pulled out of a part. 2. The connector according to claim 1, wherein the fitting portion of the clip is movable in the axial direction with respect to the extending portion of the connector main body, and the fitting portion of the clip is formed of a rigid inner cylinder. A connector provided with locking means for preventing the fitting portion from expanding in diameter when moved to a side opposite to a base end. 3. The connector according to claim 2, wherein the locking means is provided on a side of the locking claw opposite to the base end of the rigid inner cylinder, and the clip moves to a side opposite to the base end of the rigid inner cylinder. A connector characterized by being a lock claw sometimes engaging around the through hole on the inner peripheral surface of the extension portion. 4. The connector according to claim 2, further comprising an urging means for urging the clip toward a side opposite to a base end of the rigid inner cylinder. 5. The connector according to claim 1, wherein the connector body is formed by integrally connecting the connection portion and the hose in a state where the connection portion of the rigid inner cylinder is inserted and coupled into the distal end portion of the hose. A connector having a hose compression coupling portion for compressing and deforming a hose distal end portion in a radial direction between the connection portion and a hose distal end portion so as to be coupled to the connector. 6. The connector according to claim 1, wherein the rigid inner cylinder is formed of a metal, and a space between the rigid inner cylinder and a distal end of the tubular body is sealed in the accommodating portion of the rigid inner cylinder. A connector, wherein a seal portion is formed, and at least one seal ring made of a solvent-resistant material is provided inside the seal portion. 7. The connector according to claim 1, wherein the rigid inner cylinder is formed of metal, and a plurality of protrusions projecting radially outward from a connection portion of the rigid inner cylinder. Are provided in a state where they are arranged in the axial direction of the connection part.