JP5988675B2 - valve - Google Patents

Description

  The present invention relates to an improvement of a valve that constitutes a fuel supply portion of a fuel tank.

  In the valve constituting the fuel supply part of the fuel tank, an annular sealing lip that is in contact with the inner surface of the backflow prevention flap held at the valve closing position by the bias of the spring at the valve closing position is fitted outside the discharge port of the connecting pipe. In some cases, the discharge port is provided so as to be sandwiched between the holding ring to be provided and the outer surface portion of the connecting pipe. However, the sealing lip made of an elastomer has a high swelling rate due to fuel. For this reason, if the sealing lip is simply sandwiched between the connecting pipe and the retaining ring as in Patent Document 1, the dimensional change of the sealing lip due to the swelling of the fuel causes the backflow prevention flap of the sealing lip to It appears as a distortion at the contact point with the inner surface, and the sealing performance at the valve closing position is lowered.

JP 2006-206042 A

  The main problem to be solved by the present invention is to prevent, as much as possible, the situation in which the sealing performance of the sealing member with respect to the valve body constituting the fuel tank is impaired by the swelling caused by the fuel in the valve constituting the fuel supply portion of the fuel tank. There is in point to do.

In order to achieve the above object, according to the present invention, a valve is a valve constituting a fuel supply part in a fuel tank,
A valve body that closes the open end in the tank of the valve body and moves when refueling to open the open end,
An annular seal member comprising a valve seat portion and a base portion that are in contact with the valve body when closed;
The sealing member is provided with a fixing member that holds the base portion between the open end of the valve body so as to create a clearance in the diameter direction of the valve body.

  According to this configuration, the dimensional change in the radial direction of the seal member due to the swelling of the seal member by the fuel is absorbed by the clearance so that the influence of the swelling does not appear as much as possible in the valve seat portion of the seal member. Can be.

  A hooked convex portion protruding in the direction along the axial direction of the valve body is formed on the base portion of the seal member, and the fixing member protrudes in the direction along the axial direction of the valve body and is more than the hooked convex portion. One preferred embodiment of the present invention is to form a hooking convex portion for the hooking convex portion located on the center side of the valve body. In addition, a hooked convex portion protruding in the direction along the axial direction of the valve body is formed on the base portion of the seal member, and the opening end of the valve body protrudes in the direction along the axial direction of the valve body and the covered portion. One preferred embodiment of the present invention is to form a hooking convex portion for the hooked convex portion that is located closer to the center of the valve body than the hooking convex portion. When it does in this way, the shift | offset | difference of the sealing member toward the inward of the valve | bulb main body can be prevented by this hooking convex part and the hooking convex part with respect to this. Further, in this case, the base portion of the seal member is sandwiched between the opening end of the valve body and the fixing member at both or any one of the place where the hooked convex portion is formed and the remaining portion. Is one of the preferred embodiments of the present invention.

  According to this invention, it is possible to prevent as much as possible the situation in which the sealing performance of the sealing member with respect to the valve body constituting the valve constituting the fuel supply portion of the fuel tank is impaired by the swelling due to the fuel.

FIG. 1 is a side view of a valve (first example) according to an embodiment of the present invention. FIG. 2 is a left side view of the first example. 3 is a cross-sectional view taken along line AA in FIG. FIG. 4 is a perspective view of a fixing member constituting the first example. FIG. 5 is a perspective view of a sealing member constituting the first example. FIG. 6 is an enlarged cross-sectional view of the main part of the first example. FIG. 7 is an enlarged cross-sectional view of a main part showing an example in which a part of the configuration of the first example is changed. FIG. 8 is an enlarged cross-sectional view of a main part showing an example in which part of the configuration of the first example is changed. FIG. 9 is an enlarged sectional view of an essential part of a valve (second example) according to one embodiment of the present invention. FIG. 10 is a perspective view of a fixing member constituting the second example. FIG. 11 is a perspective view of a sealing member constituting the second example. FIG. 12 is a bottom view of the sealing member constituting the second example. FIG. 13 is an enlarged cross-sectional view of a main part of a valve (third example) according to one embodiment of the present invention.

Hereinafter, with reference to FIGS. 1 to 13, for a typical embodiment of the present invention will be described. The valve V according to this embodiment is provided between the filler pipe P and the fuel tank T and constitutes an oil supply part of the fuel tank T. The valve V is typically attached to the fuel tank T so that a part of the valve V is located in the tank Tc by using a through hole Tb provided in the side wall Ta of the fuel tank T. A portion of the valve V located outside the tank is connected to the filler pipe P. The valve V is a check valve that opens only when fuel is supplied through the filler pipe P.

  The valve V includes a valve body 1, a valve body 2, a seal member 3, and a fixing member 4. In the illustrated example, the valve body 1, the valve body 2, and the fixing member 4 have a structure suitable for providing as a synthetic resin molded product.

  The valve body 1 has a cylindrical shape in which both ends of the cylinder are opened. In the illustrated example, the valve body 1 has a cylindrical shape. An outer casing 10 is formed on the side of the valve body 1. The outer diameter of the outer casing 10 is larger than the diameter of the through hole Tb formed in the fuel tank T, and the outer casing 10 is on the outer surface of the fuel tank T on one side of the valve body 1 sandwiching the outer casing 10. The valve body 1, that is, the valve V, is attached to the fuel tank T by being inserted into the tank Tc through the through hole Tb to a position where the valve body 1 comes into contact, and by fixing the outer casing 10 to the outer surface portion of the fuel tank T. It is like that. In the illustrated example, such attachment can be performed by welding the circumferential convex portion 11 formed on the outer peripheral portion of the outer casing 10 to the outer surface portion of the fuel tank T. In the illustrated example, the other side of the valve body 1 across the outer casing 10 is inserted into the terminal side of the filler pipe P and connected to the filler pipe P.

  The valve body 2 closes the open end 12 of the tank body Tc of the valve body 1, in the illustrated example, one side of the valve body 1 sandwiching the outer casing 10, and moves during refueling to move to the open end. 12 is opened. In the illustrated example, the valve body 2 has a disk shape. On the outer surface of the valve body 2 opposite to the inner surface 22 facing the open end 12, one end of the arm is integrally connected to the center side of the outer surface, and the other end of the arm is projected outward from the outer edge of the valve body 2. A pair of arm portions 20 is provided. The pair of arm portions 20 and 20 are parallel to each other with a space therebetween, and a shaft hole 21 is formed at the other end of the arm. In the illustrated example, the valve body 2 is rotatably assembled to the valve main body 1 through the fixing member 4 and thus through the fixing member 4 with the shaft hole 21.

  The seal member 3 includes a valve seat portion 30 and a base portion 31 that are in contact with the valve body 2 when closed, and has an annular shape. The sealing member 3 is made of an elastomer such as rubber or synthetic resin having rubber-like elasticity. In the illustrated example, the seal member 3 further includes a sleeve portion 32 having a short cylindrical shape. The inner diameter of the sleeve portion 32 is substantially equal to the inner diameter of the valve body 1. A valve seat portion 30 is integrally connected to one end of the cylinder of the sleeve portion 32. In the illustrated example, the valve seat portion 30 is configured to have a skirt shape that gradually increases the inner and outer diameters as the distance from the connection side with the sleeve portion 32 increases. Further, a base portion 31 having an outer collar 10 shape is formed at the other end of the sleeve portion 32.

  Further, the fixing member 4 sandwiches the base portion 31 of the seal member 3 with the open end 12 of the valve body 1 so as to create a clearance C in the diameter direction of the valve body 1. ing. In the illustrated example, the fixing member 4 is configured to have a short cylindrical shape. An inner collar 40 is formed at one end of the cylinder of the fixing member 4. The inner diameter of the fixing member 4 is substantially equal to the outer diameter of the valve body 1, while the inner diameter of the location where the inner flange 40 is formed is substantially equal to the inner diameter of the valve body 1. A bearing portion 41 is formed outside the side portion of the fixing member 4. The bearing portion 41 has a thick shaft portion 41a that is thicker between the left and right thin shaft portions 41b and 41b, and the thick shaft portion 41a is integrated with a side portion of the fixing member 4, and the center of the bearing portion 41 is formed. The line y is orthogonal to the cylinder axis of the fixing member 4. In the illustrated example, the left thin shaft portion 41b of the bearing portion 41 is received in the shaft hole 21 of the left arm portion 20 of the pair of arm portions 20 and 20, and the right thin shaft of the bearing portion 41 is included. The portion 41b is accommodated in the shaft hole 21 of the right arm portion 20 of the pair of arm portions 20 and 20, so that the fixing member can be rotated about the center line y of the bearing portion 41 as the rotation center. 4 is combined with the valve body 2.

  On the side of the fixing member 4, the cylinder other end 43 side of the fixing member 4 extends to the clamping position where the base portion 31 of the sealing member 3 is clamped between the inner flange 40 and the open end 12 of the valve body 1. In the state in which the open end 12 side of the valve body 1 is inserted inside the fixing member 4, an engaged portion 42 that is engaged with the engaging portion 13 formed on the side portion of the valve body 1 is formed. Yes. In the illustrated example, the engaged portion 42 is a window hole formed in the side portion of the fixing member 4, and the engaging portion 13 is a protrusion protruding from the side portion of the valve body 1. In the example shown in the drawing, the fixing member 4 side is temporarily elastically deformed mainly by the protrusion as the engaging portion 13 at the time of insertion, and the engaged portion 42 is formed by elastic return of the fixing member 4 in the clamping position. A protrusion on the window hole enters, and the fixing member 4 and the valve body 2 are assembled to the valve body 1.

  In the illustrated example, the torsion coil spring 5 causes the valve body 2 to be positioned in a closed position where the inner surface 22 thereof is in close contact with the valve seat portion 30 of the seal member 3 and the open end 12 of the valve body 1 is closed. It has become. In the illustrated example, the spring 5 passes the coil portion 50 through the thick shaft portion 41a of the bearing portion 41, presses one arm portion 51 against the outer surface of the valve body 2, and fixes the other arm portion (not shown). The member 4 is fixed. The valve body 2 is rotated upward about the bearing portion 41 to open the open end 12 of the valve body 1 against the urging of the spring 5 caused by the fuel fed during the refueling. .

  Moreover, in the first example shown in FIGS. 1 to 6, a hooked protrusion 33 protruding in a direction along the axial direction x of the valve body 1 is formed on the base portion 31 of the seal member 3, and the fixing member 4. A hooking convex portion 44 that protrudes in a direction along the axial direction x of the valve main body 1 and that is positioned closer to the center of the valve main body 1 than the hooked convex portion 33 is formed. In this first example, the hooked convex portion 33 is configured as a circumferential convex strip 34 that borders the outer edge of the base portion 31. The hooked convex portion 33 protrudes from the base portion 31 toward the seal member 3 side. On the other hand, in this first example, the hooking convex portion 44 is configured as a circumferential protrusion 45 that borders the inner edge of the inner collar 40 of the fixing member 4. The hooking protrusion 44 protrudes toward the other end 43 side of the fixing member 4. And in this 1st example, in the state which made the latching convex part 44 of the fixing member 4 enter between the sleeve part 32 and the latching convex part 33 of the sealing member 3, this latching convex part 44 and the valve main body 1 The base portion 31 of the seal member 3 is clamped by the open end 12. The sealing member 3 attached to the open end 12 of the valve body 1 by such clamping causes the valve seat portion 30 to protrude from the outer surface of the inner flange 40 of the fixing member 4 into the tank Tc. Further, in this first example, in the attached state of the seal member 3, between the inner surface of the side portion of the fixing member 4 and the hooked convex portion 33 of the seal member 3, the hooked convex portion 33 and the fixing member 4 Clearances C are formed between the engaging projection 44 and between the engaging projection 44 and the sleeve portion 32 of the seal member 3. Further, the inside of the sleeve portion 32 of the seal member 3 is a fuel flow path that continues inside the valve body 1. Thus, in this first example, the engagement convex portion 44 and the engagement convex portion 33 can prevent the seal member 3 from being displaced inward of the valve body 1, and the swelling of the seal member 3 by the fuel can be prevented. The dimensional change in the radial direction of the seal member 3 caused by the above can be absorbed by the clearance C, and the influence of the swelling can be prevented from appearing as much as possible in the valve seat portion 30 of the seal member 3.

  Note that the base portion 31 of the seal member 3 is sandwiched between the open end 12 of the valve body 1 and the fixing member 4 at either or both of the place where the hooked projection 33 is formed and the other portion. All you need is enough. For example, in the first example, the hooked convex portion 33 of the seal member 3 is sandwiched between the inner flange 40 of the fixing member 4 and the open end 12 of the valve body 1, and the hooked convex portion 33 and the hooked convex portion 44 are May be simply caught in the radial direction of the valve body 1.

  In such a first example, as shown in FIG. 7, a circumferential protrusion 46 protruding in a direction along the axial direction x of the valve body 1 is provided at a corner where the side portion of the fixing member 4 and the inner flange 40 come into contact. By doing so, the amount of deformation of the valve seat portion 30 of the seal member 3 at the valve closing position can be made constant by the circumferential ridge 46. Further, in this first example, as shown in FIG. 8, if the circumferential protrusions 23 are provided on the inner surface of the valve body 2 and on the outer edge thereof, the valve seat portion 30 of the seal member 3 in the valve closing position. The amount of deformation of the fuel can be made constant by the circumferential ridge 23, and the fuel level can be increased by running the vehicle when the fuel level in the tank Tc is located below the installation position of the valve V. It is possible to prevent the fuel from adhering to the seal member 3 as much as possible even if the valve swings.

  In the second example shown in FIG. 9, the hooking convex portion 44 of the fixing member 4 is constituted by four convex strips 47... 47 formed at intervals of approximately 90 degrees in the direction of circling the cylindrical shaft of the fixing member 4. ing. At the same time, the sealing member 3 is provided with a through-hole 35 in which the front end side of the protrusion 47 as the engaging protrusion 44 can enter the base portion 31 between the engaging protrusion 33 and the sleeve portion 32 of the sealing member 3. Are formed at four locations at intervals of approximately 90 degrees in the direction of turning around. The remaining components of the second example are substantially the same as those of the first example, and a description thereof will be omitted.

  In the third example shown in FIG. 13, a hooked convex portion 33 protruding in the direction along the axial direction x of the valve body 1 is formed on the base portion 31 of the seal member 3, and at the open end 12 of the valve body 1. A hooking convex portion 14 that protrudes in a direction along the axial direction x of the valve main body 1 and is located closer to the center of the valve main body 1 than the hooked convex portion 33 is formed. In this third example, the hooked convex portion 33 is configured as a circumferential convex strip 36 that borders the outer edge of the base portion 31. The hooked convex portion 33 protrudes from the base portion 31 toward the side opposite to the formation side of the valve seat portion 30. On the other hand, in this third example, a circular ridge 17 serving as the engaging projection 14 is formed at the corner of the open end 12 of the valve body 1 where the end surface 15 and the inner surface 16 of the valve body 1 are in contact. Yes. In this third example, the hooking convex portion 33 of the seal member 3 is positioned outside the hooking convex portion 14 of the valve body 1, and the hooking convex portion 14 and the inner flange 40 of the fixing member 4 are used. The base portion 31 of the seal member 3 is sandwiched. In this third example, when the sealing member 3 is attached, the hooking convex portion 33 and the hooking convexity of the valve body 1 are formed between the inner surface of the side portion of the fixing member 4 and the hooking convex portion 33 of the sealing member 3. Clearances C are respectively formed between the portions 14. Accordingly, even in this third example, the engagement convex portion 14 and the engagement convex portion 33 can prevent the seal member 3 from being displaced inward of the valve body 1 and the swelling of the seal member 3 by the fuel. The dimensional change in the radial direction of the seal member 3 caused by the above can be absorbed by the clearance C, and the influence of the swelling can be prevented from appearing as much as possible in the valve seat portion 30 of the seal member 3. The remaining components of the third example are substantially the same as those of the first example, and a description thereof will be omitted.

In the Tc tank 1 Valve body 12 Open end 2 Valve body 3 Seal member 31 Base part 4 Fixing member C Clearance

Claims (2)

A valve constituting a fueling part in a fuel tank,
A valve body that closes the open end in the tank of the valve body and moves when refueling to open the open end,
An annular seal member comprising a valve seat portion and a base portion that are in contact with the valve body when closed;
A fixing member for holding the base portion of the seal member between the open end of the valve body so as to create a clearance in the diameter direction of the valve body ;
A hooked protrusion that protrudes in a direction along the axial direction of the valve body is formed on the base portion of the seal member,
A hooking protrusion is formed on the fixed member that protrudes in a direction along the axial direction of the valve body and is located on the center side of the valve body with respect to the hooked protrusion.
In addition, the valve is characterized in that the base portion of the seal member is sandwiched between the opening end of the valve body and the fixing member at both or any one of the place where the hooked projection is formed and the other part. A valve constituting a fueling part in a fuel tank,
A valve body that closes the open end in the tank of the valve body and moves when refueling to open the open end,
An annular seal member comprising a valve seat portion and a base portion that are in contact with the valve body when closed;
The base portion of the sealing member, between the open end of the valve body, Ri Na and a fixing member for clamping so as to make a clearance in the radial direction of the valve body,
A hooked protrusion that protrudes in a direction along the axial direction of the valve body is formed on the base portion of the seal member,
A hooking protrusion is formed on the open end of the valve main body, protruding in a direction along the axial direction of the valve main body, and the hooking convex part positioned on the center side of the valve main body with respect to the hooking convex part.
In addition, the valve is characterized in that the base portion of the seal member is sandwiched between the opening end of the valve body and the fixing member at both or any one of the place where the hooked projection is formed and the other part.

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