JP6204225B2 - Check valve - Google Patents

Description

  The present invention relates to a check valve, and is used, for example, at a connection portion between a fuel tank and a fuel supply pipe.

  In a fuel tank for automobiles, the end of the fuel pipe that connects the fuel inlet and the fuel tank is inserted into the fuel tank, and a check valve (ICV: Inlet Check Valve) is provided at the end of the fuel tank. And the technique which suppresses the back flow of the fuel vapor | steam to the fuel filler opening side is well-known (for example, patent document 1, 2).

  The check valve according to Patent Literature 1 includes a piston that can reciprocate along the axial direction of the oil supply pipe, and an urging member that urges the piston toward the oil supply port of the oil supply pipe. The discharge port of the fuel supply pipe is formed at the end or side of the fuel supply pipe, and is opened when the piston moves backward against the biasing member by the pressure of the supplied fuel liquid. The purpose of this check valve is to disperse the fuel discharged from the fuel supply pipe into the fuel tank over a wide range, lower the temperature in the fuel tank with a relatively low temperature fuel, and suppress the generation of fuel vapor. Yes. Therefore, when the discharge port is formed at the end of the oil supply pipe, the piston moves backward so that an annular discharge port continuous in the circumferential direction is formed, and the discharge port is formed on the side of the oil supply pipe. In this case, a plurality of discharge ports are formed in the circumferential direction, and the fuel is dispersed and discharged in the radial direction of the oil supply pipe. However, when the fuel is dispersed and discharged from the fuel supply pipe into the fuel tank, a part of the fuel liquid is in the form of droplets, and the time that the fuel liquid stays in the air becomes long, so that fuel vapor is likely to be generated. There is a problem of becoming.

  The check valve according to Patent Document 2 includes a discharge port formed at the entry end of the fuel supply pipe into the fuel tank, a flap rotatably supported at the entry end of the fuel supply pipe, and a flap that opens and closes the discharge opening. And a torsion spring biased toward the discharge port side. The discharge port is opened when the flap is rotated against the biasing member by the pressure of the supplied fuel. In this check valve, in order to suppress the generation of fuel vapor and fuel bubbles, the entry end of the fuel supply pipe is curved so that the discharge port faces vertically downward, and in the air of the fuel discharged from the discharge port The stay time is short.

Japanese Patent No. 3244008 Japanese Patent No. 3603688

  However, the check valve according to Patent Document 2 has a problem that the outer dimension of the oil supply pipe is increased because the rotation shaft of the flap is provided outside the oil supply pipe. Moreover, since it is necessary to ensure a space in which the flap can be rotated outside the oil supply pipe, a relatively large mounting space is required. Further, since the flap valve urged by the torsion spring is difficult to abut against the valve seat with a uniform pressure, the sealing performance when closed is poor. In addition, the work of assembling the flaps to the oil supply pipes while interposing the torsion springs is relatively complicated, and automatic assembly by a machine is difficult, resulting in poor productivity.

  In view of the above background, it is an object of the present invention to suppress the vaporization of flowing liquid and to make the structure small and simple in a check valve.

  In order to solve the above-mentioned problems, the present invention provides a check valve (1) including a passage (5) formed inside and a discharge port (23) formed on a side facing downward. A body (2), a valve seat (20) provided on the upstream side of the discharge port of the inner wall of the pipe body, facing the downstream side of the passage, and displaceable downstream of the valve seat of the passage A valve body (35) including a main body portion (36) that can be seated on the valve seat, and a biasing member (40) that biases the valve body toward the valve seat side. The body is separated from the valve seat against the biasing member and inclined with respect to the seating posture seated on the valve seat when the pressure of the liquid flowing in the passage toward the discharge port is applied It moves to an open position, The said main-body part comprises the wall which guides the flow of the liquid which flows through the said channel | path to the said discharge outlet side, It is characterized by the above-mentioned.

  According to this configuration, since the liquid is discharged from the discharge port formed on the side portion facing the lower side of the tube, the liquid flows in one downward direction, the liquid is prevented from being atomized, and is retained in the air. Since time is shortened, vaporization of the liquid is suppressed. In addition, since the main body of the valve body constitutes a wall that guides the flow of liquid flowing in the passage to the discharge port side in the open position, the flow of liquid from the passage to the discharge port becomes smooth, and pressure loss is reduced. The

  In the above invention, the main body portion may have a plate shape, and a main surface thereof may be perpendicular to the axis of the tubular body at a closed position where the main surface is seated on the valve seat.

  According to this configuration, since the valve body is seated on the valve seat from the axial direction of the tube body, the valve body and the valve seat can be brought into stable contact with each other, and the sealing performance of the valve body and the valve seat is improved.

  In the above invention, the biasing member is a compression coil spring, and is interposed between the tubular body and the valve body so as to be coaxial with the axis of the tubular body, and the valve body is disposed on the tubular body. The valve seat may be urged along the axial direction.

  According to this structure, the support structure of the valve body which can be opened and closed and can be inclined with respect to the pipe body can be simplified, and the assembly becomes easy. In addition, since the valve body is urged toward the valve seat along the axial direction of the pipe body by the compression coil spring, the contact pressure distribution between the valve body and the valve seat is homogenized, and the sealing performance of the valve body and the valve seat Will improve.

  In the above invention, the main body may have a plate shape, and a main surface thereof extends in the up-down direction at the open position.

  According to this configuration, the main body portion serves as a guide that guides the liquid vertically downward at the open position, and the liquid is guided vertically downward to shorten the residence time in the air.

  In the above invention, the valve body is preferably displaceable in a direction along the axis of the tube and can be inclined with respect to the axis of the tube.

  According to this configuration, since the valve body can be displaced in the direction along the axis of the tube body, the passage of the passage connected to the discharge port by the displacement of the valve body beyond the discharge port in the direction away from the valve seat. The cross-sectional area can be increased. That is, pressure loss due to the valve body can be suppressed.

  In the above invention, the tube body may have a regulating portion (24) that determines an open position of the valve body by contacting the valve body.

  According to this structure, the inclination posture of the valve body in the open position is determined.

  Said invention WHEREIN: When the said valve body exists in an open position, the edge part of the said main-body part is good to be arrange | positioned at the edge part of the said discharge outlet.

  According to this configuration, the valve body constitutes a part of the passage wall continuing to the discharge port, and the liquid is guided to the valve body and smoothly flows from the passage to the discharge port.

  In the above invention, the tube body may have a flange portion (26) protruding from an edge portion of the discharge port in a direction parallel to a main surface of the main body portion of the valve body in an open position.

  According to this configuration, since the flange extends the wall of the passage formed by the main body of the valve body, the fluid discharged from the discharge port flows in a direction along the main surface of the main body.

  In the above invention, the tubular body has a first engaging portion (45) extending in the axial direction of the tubular body, and the valve body is slidable in the axial direction of the tubular body. It is good to have the 2nd engaging part (46) engaged with a joint part.

  According to this structure, the attitude | position with respect to the pipe body of a valve body is controlled by engagement with a 1st engaging part and a 2nd engaging part, and the displacement mode from the closed position of a valve body to an open position is stabilized. Moreover, detachment | leave with respect to the pipe body of a valve body is suppressed.

  In the above invention, the valve body has a shaft portion (37) protruding from a side opposite to the valve seat side of the main body portion, and the tubular body has the shaft portion in an inclined direction of the valve body. It is good to have the receiving hole (31) which receives so that inclination is possible.

  According to this configuration, the direction in which the valve body can be tilted is regulated by the engagement between the shaft portion and the receiving hole, and the posture of the valve body is stabilized.

  According to the above configuration, in the check valve, vaporization of the flowing liquid can be suppressed, and a small and simple structure can be achieved.

Sectional perspective view which shows the closed state of the non-return valve which concerns on embodiment Exploded perspective view of a check valve according to an embodiment Sectional perspective view which shows the half-open state of check valve which concerns on embodiment Sectional perspective view which shows the full open state of the non-return valve which concerns on embodiment Sectional drawing which shows the fuel tank provided with the non-return valve which concerns on embodiment, and a fuel supply pipe | tube Cross-sectional view of a check valve according to a modified embodiment

  Embodiments of a check valve according to the present invention will be described below with reference to the drawings. The check valve according to the present embodiment is provided at a connection portion between an automobile fuel tank and a fuel supply pipe.

  As shown in FIGS. 1 and 2, the check valve 1 has a tubular body 2 constituting an outer shell thereof. The tubular body 2 is formed by combining a cylindrical first member 3 and a second member 4 and has a passage 5 therein. The first member 3 is a cylinder having a first end that is one end in the longitudinal direction and a second end that is the other end, and the second member 4 is open at a first end that is one end in the longitudinal direction. It is a bottomed cylinder which has the bottom part 4A in the 2nd end which is the other end. By connecting the second end of the first member 3 and the first end of the second member 4 together, the tubular body 2 having a continuous passage 5 is formed. The first member 3 and the second member 4 extend substantially linearly, and the tube body 2 and the passage 5 extend substantially linearly. Let A be the axis of the tube 2. Since the check valve 1 allows the flow of liquid from the first end of the first member 3 to the second end of the second member 4, the first end of the first member 3 is the upstream end, and the second member 4 It can be said that the second end is the downstream end.

  The 1st member 3 has the 1st latching | locking part 11 which protruded to radial direction at the outer peripheral part of the 1st end, and was extended in the circumferential direction, and is 2nd engagement which is a recessed part in the outer peripheral part of the 2nd end. It has a stop 12. A plurality of second locking portions 12 are formed at intervals in the circumferential direction of the first member 3. A disc-shaped flange 13 that protrudes radially outward and extends in the circumferential direction is provided on the outer peripheral portion of the intermediate portion in the longitudinal direction of the first member 3.

  The 2nd member 4 has the diameter-expanded part 16 expanded in a step difference with respect to the other part at the 1st end. The enlarged diameter portion 16 is formed in a size that can receive the second end of the first member 3. An annular shoulder surface 17 that is orthogonal to the axis A and faces the first end side of the second member 4 is formed on the inner surface side of the second member 4 and at the boundary between the enlarged diameter portion 16 and the other portion. ing. The shoulder surface 17 faces the outer peripheral portion of the end surface of the second end of the first member 3 in a state where the second end of the first member 3 is inserted into the enlarged diameter portion 16 of the second member 4. The outer diameter of the shoulder surface 17 is set to be approximately the same as the outer diameter of the second end of the first member 3, and the inner diameter thereof is set larger than the inner diameter of the second end of the first member 3. . On the inner peripheral surface of the enlarged diameter portion 16, an elastic claw 18 projects from the radially inner side. The elastic claw 18 locks the second locking portion 12 of the first member 3 when the inner end of the first member 3 is inserted into the outer end of the second member 4. When the elastic claw 18 is locked to the second locking portion 12, the first member 3 and the second member 4 are connected coaxially.

  A valve seat member 20 is interposed between the end surface of the second end of the first member 3 and the shoulder surface 17 of the second member 4. The valve seat member 20 is formed of a flexible member such as resin or rubber, and has a ring-shaped base portion 20A having a quadrangular cross section, and the base portion 20A in the radial inner side and the axis A direction from the inner edge of the base portion 20A. It has an annular and flaky lip portion 20B that extends outward and extends in the circumferential direction. The valve seat member 20 is sandwiched between the end surface of the second end of the first member 3 and the shoulder surface 17 of the second member 4 at the outer peripheral portion of the base portion 20A, and the tip of the lip portion 20B is on the bottom 4A side of the second member 4 It arrange | positions so that it may protrude toward.

  The outer diameter of the base portion 20A of the valve seat member 20 is set to be approximately the same as the outer diameter of the end surface of the second end of the first member 3 and the outer diameter of the shoulder surface 17, and the inner diameter of the base portion 20A is The one member 3 is formed larger than the inner diameter of the end surface of the second end and smaller than the inner diameter of the shoulder surface 17. Thereby, the inner peripheral portion of the base portion 20 </ b> A of the valve seat member 20 protrudes radially inward from the inner edge of the shoulder surface 17 of the second member 4, and forms an annular valve seat facing the second member 4 side.

  A discharge port 23 that is an opening penetrating in the radial direction from the inside to the outside is formed in the side portion of the intermediate portion in the axis A direction of the second member 4. The number of the discharge ports 23 is preferably one, and the circumferential width of the discharge ports 23 is preferably 180 ° or less when defined by an angle range centering on the axis A. The opening area of the discharge port 23 is preferably larger than the cross-sectional area of the portion having the smallest cross-sectional area in the passage 5.

  On the inner surface of the second member 4, a restricting portion 24 that protrudes inward in the radial direction is formed. In the present embodiment, the restricting portion 24 extends in the circumferential direction of the inner periphery of the second member 4 and is formed in a continuous annular shape. The restricting portion 24 forms a restricting surface 24A that is a flat surface that faces the first member 3 side and is inclined with respect to a surface that is orthogonal to the axis A. When the axis A is used as a reference, the regulation surface 24A is inclined so that the one side portion where the discharge port 23 is formed is disposed on the bottom 4A side with respect to the opposite side portion. Further, the regulation surface 24A is formed so as to pass through the edge of the discharge port 23 on the bottom 4A side.

  A flange portion 26 projects outward from the outer peripheral portion of the second member 4 and on the edge of the discharge port 23 on the bottom 4A side. A surface of the flange portion 26 facing the first member 3 is disposed on the same plane as the restricting surface 24 </ b> A, and extends the restricting surface 24 </ b> A outward of the second member 4.

  In the second member 4, the side portion opposite to the side portion where the discharge port 23 is formed has an equal diameter portion 28 having a constant inner diameter on the enlarged diameter portion 16 side, and the enlarged diameter portion 16 on the regulating portion 24 side. It has a reduced diameter portion 29 whose inner diameter gradually decreases from the side toward the regulating portion 24 side. The reduced diameter portion 29 is formed so as to smoothly connect the inner surface of the second member 4 from the inner surface of the equal diameter portion 28 to the regulating surface 24A.

  A receiving hole 31 penetrating in the direction of the axis A from the inside to the outside of the bottom 4A is formed at the center of the bottom 4A of the second member 4. The receiving hole 31 has a transverse cross section formed in a long hole shape, and extends from one side where the discharge port 23 is formed to the opposite side. In addition, a portion that opens to the outside of the bottom 4A of the receiving hole 31 and that opposes the discharge port 23 is formed with a notch 31A that extends the receiving hole 31 to the side opposite to the discharge port 23. ing.

  A spring seat 32 that supports one end of a spring as an urging member, which will be described later, is formed on the inner side of the bottom portion 4A of the second member 4. The spring seat 32 is an annular bottomed hole that is recessed around the receiving hole 31 on the inner surface of the bottom portion 4A, and opens toward the first member 3 side.

  The valve body 35 is received in the second member 4 so as to be displaceable. The valve body 35 includes a disc-shaped main body portion 36 having a main surface 36 </ b> A that is a flat surface, and a shaft portion 37 having a circular cross section projecting from the back surface of the main body portion 36. The shaft portion 37 may be a hollow cylinder or a solid column. The shaft portion 37 protrudes perpendicularly to the main body portion 36 from a position biased with respect to the center of the main body portion 36. A spring locking portion 38 is formed on the back surface of the main body portion 36. The spring locking portion 38 is a groove formed in an annular shape around the center of the main body portion 36 and is disposed so as to surround the shaft portion 37.

  The valve body 35 is arranged such that the main surface 36A of the main body 36 faces the valve seat member 20 side (first member 3 side) and the shaft portion 37 enters the receiving hole 31. A compression coil spring 40 as an urging member is interposed between the valve body 35 and the bottom 4A of the second member 4. One end of the compression coil spring 40 is supported by the spring seat 32, and the other end is supported by the spring locking portion 38 of the valve body 35. The valve body 35 is biased toward the valve seat member 20 by the compression coil spring 40 and is seated on the valve seat member 20. The valve body 35 contacts the base portion 20 </ b> A of the valve seat member 20 at the outer peripheral portion of the main surface 36 </ b> A of the main body portion 36. When the valve body 35 is seated on the valve seat member 20, the lip portion 20 </ b> B of the valve seat member 20 is deformed to be in close contact with the main body portion 36, and the sealing performance between the valve body 35 and the valve seat is enhanced. The passage 5 is closed when the valve body 35 is seated on the valve seat member 20, and the passage 5 is opened when the valve body 35 is separated from the valve seat member 20 against the biasing force of the compression coil spring 40.

  The receiving hole 31 receives the shaft portion 37 of the valve seat member 20 so as to be slidable (advanced / retracted) in the direction of the axis A and tilted (tilted) along a predetermined tilting plane including the axis A. Thereby, the valve body 35 is slidable along the axis A with respect to the tube body 2 and can be tilted (inclined) along the inclined plane. Even in the closed position where the valve body 35 is seated on the valve seat member 20, the shaft portion 37 maintains the state of entering the receiving hole 31.

  The second member 4 has a first engagement portion 45 extending on the inner surface thereof in the direction of the axis A, and the valve body 35 is engaged with the first engagement portion 45 so as to be slidable in the direction of the axis A. Part 46. In the present embodiment, the first engaging portion 45 is a groove extending in the direction of the axis A of the second member 4 on the inner surface of the second member 4, and the second engaging portion 46 is an edge portion of the main body portion 36. It is the convex part protrudingly provided. The second engaging portion 46 engages with the first engaging portion 45 with play, and the valve body 35 can tilt with respect to the second member 4 with the second engaging portion 46 as the center. In the present embodiment, two each of the first engagement portion 45 and the second engagement portion 46 are provided, are symmetric with respect to the axis A at 180 °, and have a predetermined plane as a symmetry plane. They are provided at positions that are symmetrical to each other. Thereby, the valve body 35 can be tilted along the tilt plane about the straight line connecting the two second engaging portions 46. That is, the two second engaging portions 46 engage with the first engagement, thereby determining the tilting (rotating) center of the valve body 35 and the slidable direction of the valve body 35.

  As shown in FIG. 3, when the valve body 35 opens in the opening direction from the closed position, the engagement of the first engagement portion 45 and the second engagement portion 46 is maintained until the valve body 35 contacts the restriction portion 24. However, it is possible to slide in the direction of the axis A with an arbitrary inclination posture with respect to the plane orthogonal to the axis A. When the movement of the valve body 35 in the opening direction proceeds and the edge portion of the main body portion 36 on the side opposite to the discharge port 23 comes into contact with the restriction portion 24, this portion is moved in the direction of the axis A by the restriction portion 24. Be regulated. As a result, when the valve body 35 further moves in the opening direction, the valve body 35 tilts along the tilting plane, and finally the inclined posture in which the edge of the main body portion 36 abuts the regulating portion 24 over the entire circumference. Take. As shown in FIG. 4, the position at which the edge of the main body 36 abuts the restricting portion 24 over the entire circumference is defined as the most open position of the valve body 35. When the valve body 35 is in the most open position, the main body 36 closes the receiving hole 31 and the spring seat 32, the edge on the discharge port 23 side is disposed at the edge of the discharge port 23, and the main surface 36 </ b> A is A wall surface of the passage 5 is formed. That is, the main surface 36 </ b> A of the main body 36 forms a wall surface that is inclined with respect to a plane orthogonal to the axis A so as to guide the fluid flowing through the passage 5 to the discharge port 23 side.

  The 1st member 3, the 2nd member 4, and the valve body 35 are good to be formed from resin. The first member 3 may be molded from a single resin, or may be molded by combining two or more different resins. For example, the inner part of the first member 3 may be made of polyamide having high impermeability to fuel vapor such as gasoline, and the outer part may be made of polyethylene.

  As shown in FIG. 2, the check valve 1 configured as described above sequentially forms the first member 3, the valve seat member 20, the valve body 35, the compression coil spring 40, and the second member 4 along the axis A. The first member 3 and the first member 3 are arranged with the valve seat member 20, the valve body 35, and the compression coil spring 40 interposed between the first member 3 and the second member 4. Each member can be assembled by joining the two members 4 together. Therefore, assembly is easy and automatic assembly using a machine can be applied.

  Next, a structure for mounting the check valve 1 to the fuel tank 50 will be described. As shown in FIG. 5, the fuel tank 50 has an inclined wall portion 53 whose outer surface is inclined with respect to the horizontal plane H at the boundary between the side wall portion 51 and the upper wall portion 52. An attachment hole 54 that penetrates the inclined wall portion 53 is formed in the inclined wall portion 53. A cylindrical boss 55 protruding outward is formed around the mounting hole 54. The check valve 1 is inserted into the boss 55 and the mounting hole 54 from the second member 4 side of the tubular body 2, and is arranged so that the flange 13 abuts against the end surface of the boss 55. The flange 13 and the end surface of the boss 55 are coupled to each other by vibration welding. At this time, the posture of the check valve 1 is determined so that the axis A is inclined with respect to the horizontal plane H and the discharge port 23 opens downward. Further, the posture of the check valve 1 is determined so that the main surface 36A of the main body 36 of the valve body 35 at the most open position is orthogonal to the horizontal plane H. The posture of the check valve 1 can be changed by changing the angle of the inclined wall portion 53, the boss 55, and the flange 13 of the check valve 1.

  In a state where the check valve 1 is attached to the fuel tank 50, the first end of the first member 3 protrudes outside the fuel tank 50. One end of an oil supply pipe 60 connected to the oil supply port is connected to the first end of the first member 3. The first end of the first member 3 is inserted into the end of the oil supply pipe 60, and the first locking part 11 engages with the inner surface of the oil supply pipe 60. In this state, by attaching the annular fastening member 61 to the outer surface of the oil supply pipe 60, the connection between the first member 3 and the oil supply pipe 60 is further strengthened.

  The operation and effect of the check valve 1 configured as described above will be described. The check valve 1 is configured such that the valve seat member 20 faces the fuel tank 50 side and the valve body 35 is seated on the valve seat member 20 from the fuel tank 50 side toward the fuel supply pipe 60 side, and fueling is performed. In the normal state, the valve body 35 is urged by the compression coil spring 40 and is seated on the valve seat member 20, so that the flow including the fuel vapor and the fuel liquid from the fuel tank 50 side to the fuel supply pipe 60 side is prevented. Is done.

  When fuel is supplied through the fuel supply pipe 60, the fuel liquid pushes the valve body 35 toward the bottom 4 </ b> A side of the second member 4 against the urging force of the compression coil spring 40, and the valve body 35 moves away from the valve seat member 20. The passage 5 is opened. The valve body 35 slides along the axis A toward the bottom 4A side of the second member 4 at the initial stage of movement to the most open position (see FIG. 3), and inclines against the regulating portion 24 at the final stage (inclination). Finally, the main surface 36A of the main body 36 reaches the most open position extending so as to be orthogonal to the horizontal plane H (see FIGS. 4 and 5). When the valve body 35 is in the fully open position, the discharge port 23 is fully opened, and the fuel liquid flowing along the axis 5 along the axis A is guided by the main body 36 and flows downward. It is discharged vertically downward.

  In the present embodiment, the check valve 1 discharges the fuel liquid in one direction from the discharge port 23 formed on the side facing the lower side of the tube body 2, so that the discharged fuel liquid is less likely to be granulated. Further, since the fuel liquid is discharged vertically downward from the discharge port 23, the distance to the fuel liquid level L in the fuel tank 50 is the shortest and the residence time in the air is shortened, so that the vaporization of the fuel liquid is suppressed. Is done. In addition, since the main body portion 36 of the valve body 35 functions as a guide wall that guides the flow of liquid flowing in the passage 5 to the discharge port 23 side in the open position, the flow of liquid from the passage 5 to the discharge port 23 is smooth. Thus, the pressure loss is reduced. Further, in the present embodiment, since the discharge port 23 is provided on the side portion of the tube body 2, the opening area of the discharge port 23 can be increased within the passage 5 without increasing the size of the check valve 1. Can be set larger than the cross-sectional area of the smallest portion, and the pressure loss in the discharge port 23 portion can be reduced.

  In the present embodiment, the valve seat member 20 is provided on a plane orthogonal to the axis A, and the valve body 35 is moved along the axis A by the compression coil spring 40 arranged along the axis A. Accordingly, the contact pressure distribution between the valve body 35 and the valve seat member 20 is homogenized, and the sealing performance of the valve body 35 and the valve seat member 20 is improved.

  Further, the valve body 35 functions as a guide wall that bends the flow of the fuel fluid flowing along the axis A in the passage 5 toward the discharge port 23 by being inclined with respect to the plane orthogonal to the axis A at the most open position. can do. Thereby, the pressure loss when the fuel fluid passes through the check valve 1 is reduced. Further, the inner surface of the reduced diameter portion 29 of the second member 4 functions as a guide wall continuous with the main body portion 36 at the most open position, and the flow of the fuel fluid in the passage 5 is smoothly performed in the direction along the main body portion 36. There is an effect of curving. The flange portion 26 has an effect of extending the guide wall formed by the main body portion 36 and can more reliably guide the flow of the fuel liquid passing through the discharge port 23 downward in the vertical direction.

  Since the valve body 35 is not only inclined but also displaced along the axis A toward the bottom 4A of the second member 4, the valve body 35 can pass through the discharge port 23 toward the bottom 4A in the direction of the axis A. It is avoided that the body 35 becomes the resistance of the fuel liquid flowing to the discharge port 23, and the pressure loss is reduced.

  The posture of the valve body 35 when moving from the closed position to the most opened position is stable by the engagement of the shaft portion 37 and the receiving hole 31 and the engagement of the first engagement portion 45 and the second engagement portion 46. In addition, desorption from the tube body 2 is suppressed.

  Although the description of the specific embodiment is finished as described above, the present invention is not limited to the above embodiment and can be widely modified. For example, in the above embodiment, the first engaging portion 45 is a groove and the second engaging portion 46 is a convex portion that engages with the groove. However, in other embodiments, the first engaging portion 45 is along the axis A. The second engaging portion 46 may be a groove (concave portion) that engages with the first engaging portion 45 so as to be slidable in the direction of the axis A. In the above-described embodiment, the restricting portion 24 is formed in an annularly continuous shape. However, in other embodiments, the restricting portion 24 may be configured by at least three convex portions projecting radially inward from the inner surface of the second member 4.

  Moreover, in the said embodiment, although the main body part 36 of the valve body 35 contact | abutted to the control part 24, it was set as the structure which the attitude | position of the most open position was decided, but as shown in FIG. 6, the inner surface 31B of the receiving hole 31 is inclined. It is good also as a structure which makes it a surface (cam surface) and inclines the axial part 37, so that the axial part 37 advances to the bottom part 4A side.

Moreover, in the said embodiment, although the main-body part 36 was made into disk shape, in other embodiment, the main-body part 36 is shown.
A concave portion or a convex portion may be provided in the central portion of the nozzle, and the fluid may be guided to the discharge port 23 side by the concave portion or the convex portion. In this case, it is preferable that the peripheral portion of the main body portion 36 has a shape that can be in close contact with the valve seat member 20.

  In the above embodiment, the valve body 35 is slidable in the direction along the axis A and can be tilted (turned) with respect to the axis A. In other embodiments, the valve body 35 The sliding movement may be restricted so that only tilting (turning) is possible.

  Further, the displacement direction of the valve body 35 may include not only the direction along the axis A but also the radial direction of the axis A. For example, the valve body 35 may be displaced in the radial direction so that a part of the edge portion of the main body portion 36 enters the discharge port 23.

  DESCRIPTION OF SYMBOLS 1 ... Check valve, 2 ... Pipe body, 3 ... 1st member, 4 ... 2nd member, 4A ... Bottom part, 5 ... Passage | path, 20 ... Valve seat member, 20A ... Base part, 20B ... Lip part, 23 ... Discharge port 24 ... restricting portion, 24A ... restricting surface, 26 ... collar portion, 28 ... equidiameter portion, 29 ... reduced diameter portion, 31 ... receiving hole, 35 ... valve body, 36 ... main body portion, 36A ... main surface, 37 ... Shaft portion, 40 ... compression coil spring, 45 ... first engagement portion, 46 ... second engagement portion, 50 ... fuel tank, 53 ... inclined wall portion, 54 ... mounting hole, 60 ... fuel supply pipe, A ... tube body Axis

Claims (9)

A check valve,
A tube including a passage formed inside and a discharge port formed on a side facing downward;
A valve seat provided on the upstream side of the discharge port of the inner wall of the tubular body and facing the downstream side of the passage;
A valve body including a main body portion that is displaceably provided downstream of the valve seat in the passage and can be seated on the valve seat;
A biasing member that biases the valve body toward the valve seat,
The valve body is separated from the valve seat against the biasing member when the pressure of the liquid flowing in the passage toward the discharge port is applied, and with respect to the seating posture seated on the valve seat Moving to the inclined open position, the main body portion constitutes a wall for guiding the flow of liquid flowing in the passage to the discharge port side ;
The non-return valve according to claim 1, wherein the tubular body has a regulating portion that determines an open position of the valve body by contacting the valve body .   2. The check valve according to claim 1, wherein the main body portion has a plate shape, and a main surface of the main body portion is orthogonal to an axis of the tubular body in a closed position where the main body portion is seated on the valve seat.   The biasing member is a compression coil spring, and is interposed between the tube body and the valve body so as to be coaxial with the axis line of the tube body, and the valve body is disposed along the axial direction of the tube body. The check valve according to claim 2, wherein the check valve is biased toward the valve seat.   The check valve according to any one of claims 1 to 3, wherein the main body has a plate shape, and a main surface thereof extends vertically in an open position.   The said valve body is displaceable in the direction along the axis line of the said tubular body, and can incline with respect to the axis line of the said tubular body, The claim 1 characterized by the above-mentioned. Check valve described in 1. 6. The reverse according to claim 1 , wherein when the valve body is in an open position, an edge of the main body is disposed at an edge of the discharge port. Stop valve. 7. The reverse according to claim 6 , wherein the tubular body has a flange portion protruding from an edge portion of the discharge port in a direction parallel to a main surface of the main body portion of the valve body in an open position. Stop valve. The tubular body has a first engaging portion extending in the axial direction of the tubular body,
The said valve body has a 2nd engaging part engaged with the said 1st engaging part so that sliding in the axial direction of the said pipe body is possible, The any one of Claims 1-7 characterized by the above-mentioned. The check valve according to the item. The valve body has a shaft portion protruding from a side opposite to the valve seat side of the main body portion,
The check valve according to any one of claims 1 to 8 , wherein the tubular body has a receiving hole that receives the shaft portion so as to be tiltable in a tilting direction of the valve body.

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