JP2018171977A - Flapper valve for oil supply port closing device and oil supply port closing device using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a flapper valve which can be locked so as not to loosen a cover body to a valve body, and an oil supply port closing device using the flapper valve, in an oil supply port closing device making a pressure regulating valve built in the flapper valve assembled with the cover body and the valve body.SOLUTION: A flapper valve is supported so as to rotate with respect to a device body of an oil supply closing device which is fixed in the inside of an oil supply pipe and is equipped with an oil supply port. The flapper valve has a cover body, a valve body, a pressure regulating valve, a lock body, and a pressure regulating valve spring which energizes the pressure regulating valve. The pressure regulating valve, the lock body, and the pressure regulating valve spring are built between the cover and the valve body while the cover body and the valve body are assembled. The lock body is hooked to the cover body while being energized to the cover body by the pressure regulating valve spring, and is hooked to the valve body so as to prevent the rotating of the lock body to the valve body. The cover body is locked to the valve body so as not to rotate.SELECTED DRAWING: Figure 3

Description

The present invention relates to a flapper valve for an oil filler closing device and an oil filler closing device using the flapper valve.

Patent Document 1 is composed of an apparatus main body that is fixed to the inside of an oil supply pipe, and a flapper valve that is rotatably attached to the apparatus main body in a state of being biased in a direction in which an oil supply port of the apparatus main body is closed. A fuel filler closing device (hereinafter referred to as an opening / closing device) is described. Such a closing device does not require a filler cap. The flapper valve is in contact with the valve seat disposed on the lower surface side of the fuel filler port from below and is urged upward. By pushing in the fuel gun, the flapper valve can be rotated downward to insert the fuel gun into the fuel filler port. When the fueling gun is pulled out, the flapper valve rotates upward and comes into contact with the valve seat from below to close the fueling port.

The oil supply port is provided with a pressure regulating valve that opens when the internal pressure of the oil supply pipe exceeds a certain level. The pressure regulating valve prevents an abnormal pressure increase due to fuel vapor in the fuel supply pipe. In the closing device of Patent Document 1, a flapper valve is configured by assembling a lid body and a valve body on which a pressing member is mounted. A pressure regulating valve is built in the flapper valve. This pressure regulating valve includes a positive pressure valve that is biased toward the valve body by a positive pressure valve spring, and a negative pressure valve that is biased toward the lid body by a negative pressure valve spring. In a normal state where no negative pressure or positive pressure is generated, the ventilation path is closed by the positive pressure valve and the negative pressure valve.

In the pressure regulating valve described above, the pressure difference between the inside and outside of the oil supply pipe is reduced as follows. For example, when the internal pressure of the oil supply pipe becomes smaller than the atmospheric pressure, the negative pressure valve descends against the bias of the spring and moves away from the positive pressure valve, opens the air passage and takes outside air into the oil supply pipe, and eliminates the negative pressure state. . Conversely, when the internal pressure of the fuel supply pipe increases with respect to atmospheric pressure, the positive pressure valve rises against the bias of the spring and moves away from the negative pressure valve, opens the air passage, releases fuel vapor from the fuel supply pipe, Eliminate the pressure state.

JP 2011-213126 A

Some pressure regulating valves include a negative pressure valve that opens when the internal pressure of the oil supply pipe becomes lower than a predetermined value, as in Patent Document 1. In many cases, the oil supply pipe is constituted only by a positive pressure valve that opens when the internal pressure of the oil supply pipe becomes higher than a predetermined pressure. The positive pressure valve spring that biases the positive pressure valve is interposed between the lid body and the positive pressure valve, and biases the positive pressure valve toward the valve body with reference to the lid body. For this reason, in order for the positive pressure valve spring to apply the urging force as designed to the positive pressure valve, it is necessary that the lid body and the valve body are firmly assembled and the lid body does not wobble.

Although the assembly structure of the lid body and the valve body is not described in detail in Patent Document 1, the claw provided on the valve body is deformed by the elasticity of plastic, and is engaged with the recess provided on the lid side. It seems that the lid is locked against the valve body so that it does not loosen.

By the way, since a fueling gun collides with the lid and the valve body or gasoline adheres, the constituent material of the lid and the valve body has high mechanical strength including rigidity and wear resistance. Oil resistance is required. For this reason, it is desirable to use a high-strength material such as PPS resin or PBT resin for the lid or valve body. However, high-strength materials such as PPS resin and PBT resin are inferior in toughness, and elastically deformed parts are easily broken. In addition, when the flapper valve is made conductive, a conductive material such as carbon powder or carbon fiber is contained in the PPS resin or PBT resin. When a conductive material is blended, the toughness is further lowered.

As described above, when a high-strength material is used as the material for the valve body or the lid, the elastic material such as the hooking claws is likely to be damaged, so that the hooking claws are elastically deformed and hooked into the recesses, etc. Therefore, it is difficult to lock the valve body so as not to loosen. Since the oil supply nozzle collides with the valve body and the cover body, if the lock is insufficient, the cover body is loosened with respect to the valve body.

The present invention relates to an oil filler closing device in which a pressure regulating valve is built in a flapper valve in which a lid and a valve body are assembled, and a flapper valve that can be locked to a valve body so that the lid body does not loosen unintentionally. An object of the present invention is to provide a fuel filler closing device using the same.

A flapper valve fixed to the inside of an oil supply pipe and rotatably supported with respect to an apparatus body of an oil supply port closing device having an oil supply port. The flapper valve includes a lid, a valve body, a pressure regulating valve, and a lock. Body, and a pressure regulating valve spring for biasing the pressure regulating valve. The pressure regulating valve, the lock body, and the pressure regulating valve spring are formed by assembling the lid body and the valve body. The lock body is engaged with the lid body while being urged against the lid body by the pressure regulating valve spring, and the lock body also cannot rotate with respect to the valve body. The above problem is solved by a flapper valve for a filler opening closing device that is engaged with the valve body and is locked in a state in which the lid body cannot rotate with respect to the valve body via the lock body. Furthermore, the above-mentioned problem is solved by an oil filler closing device provided with this flapper valve. That is, since the lid is locked against the valve body via the lock body, the lid and valve are made of a desired material such as a synthetic resin material having high mechanical strength or a synthetic resin having conductivity. It becomes possible to compose the body.

In the flapper valve and the filler closing device described above, the lid body is a lid body plane, an annular lid peripheral wall extending downward from the lid body plane, and the lid body is unlocked with respect to the valve body. A plurality of first separations that restrict rotation in the direction and restrict the separation of the first rotation restricting portion disposed on the inner surface of the lid body and the separation of the lid body and the valve body disposed on the inner surface of the lid peripheral wall. The valve body has a shape in which an end portion of the cover body peripheral wall is an opening, the valve body is a valve body plane, a circular valve body peripheral wall extending upward from the valve body plane, and the cover body is a valve. A second rotation restricting portion that is arranged on the valve body peripheral wall and engages with the third rotation restricting portion of the lock body, and a lid that is arranged on the outer surface of the valve body peripheral wall. A plurality of second separation restricting portions for restricting separation of the body and the valve body, and an end portion of the valve body peripheral wall is an opening. The lock body includes a third rotation restricting portion that engages with the second rotation restricting portion provided on the valve body peripheral wall, and a fourth rotation restricting portion that engages with the first rotation restricting portion provided on the inner surface of the lid. And by separating the plurality of first separation restricting portions arranged on the lid body from the plurality of second separation restricting portions arranged on the valve body, the separation of the lid body and the valve body is prevented. By engaging the third rotation restricting portion of the lock body with the second rotation restricting portion provided on the valve body peripheral wall, the lock body is prevented from rotating with respect to the valve body and the lock body and the valve body are separated. By engaging the fourth rotation restricting portion of the lock body with the first rotation restricting portion provided on the inner surface of the lid body in a state where the lock body is pressed against the lid body by the pressure regulating valve spring, Prevents the lid from rotating in the unlocking direction with respect to the valve body via the lock body. It is preferable to configure.

In the flapper valve and the fuel filler closing device, the first rotation restricting portion disposed on the inner surface of the lid is a convex portion, and the fourth rotation restricting portion of the lock body is a concave portion that engages with the convex portion. It is preferable. In the flapper valve and the fuel filler closing device, the plurality of first separation restricting portions provided on the lid body are protrusions extending in the circumferential direction of the inner surface of the lid body peripheral wall, and the plurality of second separation parts provided on the valve body. It is preferable that the restricting portion is a protrusion extending in the circumferential direction of the outer surface of the valve body peripheral wall. In the flapper valve and the fuel filler closing device, the second rotation restricting portion provided in the valve body is an opening penetrating the valve body peripheral wall, and the lock body has a shape having a flat portion, and the third rotation restricting portion. Are preferably formed as an arm extending downward from the flat portion and made of an elastic body, and a warp claw disposed on the tip side of the arm.

According to the present invention, in a fuel filler closing device in which a pressure regulating valve is built in a flapper valve in which a lid and a valve body are assembled, a flapper capable of locking the valve body so that the lid body does not loosen unintentionally. It becomes possible to provide a valve and a filler closing device using the valve.

It is the perspective view shown in the state which fractured | ruptured one part of one Embodiment of the filler closing device of this invention. It is a perspective view which shows the flapper valve to which the fuel filler closing device of FIG. 1 was attached. It is a perspective view which shows the state which decomposed | disassembled the flapper valve of FIG. It is a perspective view which shows the state which looked at the cover body shown by FIG. 3 from the downward direction. In the assembly procedure 1, it is a perspective view showing the state which attaches a lock body to the valve body which accommodated the pressure regulation valve. In the assembly procedure 1, it is a perspective view showing the state which assembled | attached the lock body to the valve body. In the assembly procedure 2, it is a perspective view showing the state which attaches a cover body to the valve body which attached the lock body. In the assembly procedure 2, it is a perspective view showing the state which fitted the cover body peripheral wall on the valve body peripheral wall, and covered the cover body on the valve body. In the assembly procedure 2, it is a top view showing the state which fitted the cover body peripheral wall to the valve body peripheral wall, and covered the cover body on the valve body. In the assembly procedure 3, it is a perspective view showing the state which rotated the cover body which covered the valve body. In the disassembling procedure 1, it is a perspective view showing the state which pushed the latching nail | claw of the lock body into the radial direction inward from the valve body isolation | separation regulation part. In the disassembly procedure 2, it is a top view showing the state which rotated the cover body with the lock body. In the disassembling procedure 3, it is a perspective view showing the state which isolate | separated the cover body and the lock body from the valve body simultaneously.

Hereinafter, an embodiment of a fuel filler closing device of the present invention will be described with reference to the drawings.

The fuel filler closing device 1 according to the present embodiment includes a cylindrical device main body 2 that is fixed to the inside of the distal end portion of the fuel filler pipe 4 and a flapper valve 3 that closes the fuel filler 21 of the device main body 2 from below. . The flapper valve 3 is supported with respect to the apparatus main body 2 by pivotally attaching a rotating arm 325 provided on the valve body 32 to the apparatus main body 2.
A torsion coil spring (not shown) is attached between the flapper valve 3 and the apparatus main body 2. The flapper valve is urged toward the oil supply port 21 provided in the apparatus main body 2 from below by the torsion coil spring. In the apparatus main body 2 of the present embodiment, three gun guides 22 are provided around the fuel filler 21 to guide the fuel gun to the flapper valve 3.

As shown in FIGS. 2 and 3, the flapper valve 3 includes a lid body 31, a valve body 32, a pressure regulating valve 33, a lock body 34, and a pressure regulating valve spring 331 that biases the pressure regulating valve 33. . The pressure regulating valve 33, the lock body 34, and the pressure regulating valve spring 331 are incorporated between the lid 31 and the valve body 32 in a state where the lid 31 and the valve body 32 are assembled. The lid body 31 and the valve body 32 are a screw type using a first separation restriction portion 313 and a second separation restriction portion 323, as will be described later. The lid 31 has a lid plane 311 and an annular lid peripheral wall 312 extending downward from the lid plane 311. The end of the lid peripheral wall 312 has an opening and is flat. It has a simple bowl shape and is molded from high-strength synthetic resin such as PPS resin.

As shown in FIG. 4, two first rotation restricting portions 314 are provided on the lid plane 311 at point symmetry positions on the lower surface. The first rotation restricting portion 314 is a convex portion having a quadrangular cross section having a bottom surface parallel to the bottom surface of the lid body plane 311. The first rotation restricting portion 314 engages with a fourth rotation restricting portion 344 provided on the lock body 34 described later. The fourth rotation restricting portion 344 is composed of a recess (notch). The side surface of the first rotation restricting portion 314 contacts the side edge of the notch.

The lid peripheral wall 312 is provided with a plurality (six) of rectangular communication holes 315 extending in the circumferential direction at equal intervals in the circumferential direction. The communication hole 315 constitutes a ventilation path that communicates the inside and outside of the lid 31. When the pressure in the oil supply pipe increases and the pressure regulating valve 33 (FIG. 3) is pushed up against the spring force of the pressure regulating valve spring 331, and the inside of the flapper valve 3 communicates with the inside of the oil supply pipe 4, the flapper valve 3 The fuel vapor that has flowed into the fuel is discharged out of the fuel supply pipe 4 through the communication hole 315. When the pressure in the oil supply pipe is small, the pressure regulating valve 33 is pressed against the valve seat provided on the valve body 32 by the pressure regulating spring 331. The valve seat is disposed along the edge of the opening that communicates with the space in the oil supply pipe. The communication hole 315 functions as a viewing window for confirming the positions of a first separation restricting portion 313 to be described later and a second separation restricting portion 323 engaged therewith. Further, the communication hole 315 communicates with an opening constituting the second rotation restricting portion 324 described later, and pushes the hooking claw 343 of the lock body 34 engaged with the second rotation restricting portion 324 inward as will be described later. It functions as a through hole for operation.

The first separation restricting portion 313 is provided on the inner surface of the lid peripheral wall 312 and is configured as a ridge located below a concave groove 318 extending in the circumferential direction of the lid peripheral wall 312 as shown in FIG. The upper surface of the first separation restricting portion 313 is planar. The recessed groove 318 has a shape corresponding to the second separation restricting portion 323 in order to hook the second separation restricting portion 323, and communicates with a recess 316 described later.

When the lid 31 rotates in the closing direction relative to the valve body 32, the second separation restricting portion 323 passes through the recessed portion 316 extending from the lower edge of the lid peripheral wall 312 and reaches the groove 318, and the first separation restricting portion. It moves above 313 and engages with the first separation restricting portion 313. If the lid body and the valve body are to be separated vertically, the first separation restriction portion 313 and the second separation restriction portion 323 come into contact with each other, so that separation is prevented. Since the concave groove 318 extends to the communication hole 315, when the first separation restriction part 313 engages with the second separation restriction part 323, the second separation restriction part 323 can be seen from the communication hole 315. Thereby, the latching state of the 1st separation control part 313 and the 2nd separation control part 323 can be checked from the outside.

The lid 31 rotates with respect to the valve body 32 when the valve body 32 is assembled or disassembled. In consideration of operability at the time of rotation, the lid 31 is provided with a knob-like operation portion 317 that protrudes radially outward from a part of the lid plane 311. The user can rotate the lid with the operation unit 317 when rotating the lid 31. The operation unit 317 also functions as a confirmation portion for visually recognizing the angle of the lid 31 in the rotation direction with respect to the valve body 32. The upper surface of the operation knob 317 and the lid surface 311 are formed flush with each other. Thus, the flapper valve 3 can be surely pushed open by configuring a wide plane on which the fuel gun comes into contact with the cover plane 311 and the operation knob 317.

The pressure regulating valve 33 functions as a positive pressure valve that opens and releases fuel vapor when the internal pressure of the fuel supply pipe 4 becomes higher than the atmospheric pressure. A pressure regulating valve spring 331 is disposed between the pressure regulating valve 33 and the flat portion 341 of the lock body 341. The pressure regulating valve 33 is a disk-shaped synthetic resin molded body (for example, made of POM resin) having a size that fits inside the valve body peripheral wall 322. On the outer peripheral surface of the pressure regulating valve 33, a plurality of convex portions are arranged at predetermined intervals. This convex portion is in sliding contact with the inner surface of the valve body peripheral wall 322 and guides the operation of the pressure regulating valve to move up and down. The pressure regulating valve 33 is pushed by the pressure regulating valve spring 331 against the through hole provided at the bottom portion of the valve body peripheral wall 322 and the valve seat provided at the edge of the plan passage hole from above. When the pressure in the fuel supply pipe rises due to the fuel vapor, the pressure of the fuel vapor flowing from the communication hole raises the pressure regulating valve against the spring force of the pressure regulating valve spring, and the fuel vapor flows into the valve body from the through hole. To do.

The valve element 32 includes a valve element plane 321 and a tubular valve element peripheral wall 322 extending upward from the valve element plane 321 and has an opening at the end of the valve element peripheral wall 322, such as PPS resin. Molded with high strength synthetic resin. The valve body plane 321 has a disk shape larger than the oil filler port 21 and has a fitting portion 328 of a seal ring 326 on the upper surface radially outward from the valve body peripheral wall 322. A seal ring 326 is externally fitted to the fitting portion 328. The lower edge of the lid peripheral wall 312 abuts on the fitting portion 328 to limit the lowering of the lid 31. The seal ring 326 contacts the valve seat on the lower surface side of the fuel filler port 21 when the flapper valve 3 closes the fuel filler port 21. The seal ring 326 exhibits the air tightness and liquid tightness of the fuel filler opening. A rotating arm 325 protrudes from the periphery of the valve body plane 321. The rotation arm 325 is a flange provided with a hole through which a rotation shaft (not shown) passes at an end. The rotating arms 325 have a pair of relations, and each is parallel.

A second separation restriction portion 323 is disposed on the outer surface of the valve body peripheral wall 322 with an interval through which the first separation restriction portion 313 on the lid side can pass. The second separation restriction unit 323 has a positional relationship that can be hooked with the first separation restriction unit 313. The number corresponds to the number of first separation restricting units 313. Each of the second separation restricting portions 323 is a ridge having a square cross section extending in the circumferential direction, and the lower surface is a flat surface. The valve body peripheral wall 322 is provided with a plurality of (two) openings as the second rotation restricting portion 324. The second rotation restricting portion 324 has a positional relationship with a third rotation restricting portion 342 described later, and the number thereof corresponds to the number of third rotation restricting portions 342. The opening that constitutes the second rotation restricting portion 324 is square. On the inner surface of the valve body peripheral wall 312, a ridge is provided in a direction along the vertical side of the opening. This protrusion prevents the third rotation restricting portion 342 from being displaced in the lateral direction when the latching claw 343 is engaged with the second rotation restricting portion 324. The valve body peripheral wall 322 is provided with a through hole 327 extending from the upper edge of the peripheral wall at a position not overlapping with the second rotation restricting portion 324. The through-hole 327 forms a ventilation path that allows the fuel vapor to escape to the outside of the lid 31 by communicating the inside and outside of the valve body peripheral wall 322.

As described above, if both the lid body separation restricting portion and the valve body separation restricting portion are convex stripes, the convex stripes engage with each other in the separation direction at a constant length in the circumferential direction. The body can be made stable and inseparable. As will be described later, since the lock body is pushed by the positive pressure valve spring and urged away from the valve body, the lid body in close contact with the lock surface of the lock body is also urged in the same direction. The protrusions can be tightly engaged with each other, and the lid can be reliably separated from the valve body.

The lock body 34 is composed of a disk-shaped flat portion 341, an arm extending downward from the peripheral portion of the flat portion 341, and a latching claw 343 arranged on the tip side of the arm. A third rotation restricting portion 342 and a fourth rotation restricting portion 344 formed of a recess (notch), and is made of an elastically deformable synthetic resin such as POM resin. The flat portion 341 has a size capable of pressing the pressure regulating valve spring 331. The positions in the circumferential direction of the third rotation restricting portion 342 provided in the lock body 34 and the second rotation restricting portion 324 provided in the valve body 32 correspond to each other, and both can be locked together. The positions in the circumferential direction of the fourth rotation restricting portion 344 provided in the lock body 34 and the first rotation restricting portion provided in the lid body correspond to each other, and both can be engaged with each other.

As described above, since the lock body 34 is biased toward the lid body 31 by the pressure regulating valve spring 331, the first rotation restricting portion 314 of the lid body is moved to the fourth rotation restricting portion 344 of the lock body from above. When inserted and engaged, the lid 31 cannot rotate with respect to the lock body 34. In other words, the lid 31 and the lock body 34 are integrated. And the 3rd rotation control part 342 (warp claw 343) of the lock body 34 engages with the 2nd rotation control part of a valve body. As a result, the lock body 34 and the lid body 31 cannot rotate with respect to the valve body. In this way, the lid 31 is locked to the valve body 32 through the lock body 34 so as not to rotate.

As described above, the third rotation restricting portion 342 is provided with the hooking claw 343 outside the lower end portion. The latching claw 343 is a convex strip having a substantially same width as the opening constituting the second rotation restricting portion 324 and having a flat upper surface extending in the circumferential direction, and extends from the radially inner side of the valve body peripheral wall 322 to the opening. It fits and engages with the upper edge of the opening from below. The lock body 34 is assembled to the valve body 32 so as not to rotate due to the engagement between the latching claw 343 and the second rotation restricting portion 324. As will be described later, since the third rotation restricting portion 342 can be elastically deformed, by pushing the latching claw 343 inward in the radial direction from the opening that is the second rotation restricting portion 324, You can cancel the engagement.

The procedure for assembling the flapper valve 3 of this embodiment will be described below. In the assembly procedure 1, as shown in FIGS. 5 and 6, the pressure regulating valve 33 is housed inside the valve body peripheral wall 322. The pressure regulating valve spring 331 and the lock body 34 are placed on the pressure regulating valve 33 in the order described. A third rotation restricting portion 342 that is elastically deformable of the lock body 34 is inserted between the valve body peripheral wall 322 and the pressure regulating valve spring 331 while curving inward in the radial direction. The shape of the third rotation restricting portion 342 is restored, and the latching claw 343 is fitted into the opening constituting the second rotation restricting portion 324 from the inside in the radial direction, and the latching claw 343 is engaged with the upper edge of the opening. The assembling work of the lock body 34 and the valve body 32 is a simple work of pushing the lock body 34 toward the valve body 32. The lock body 34 cannot rotate with respect to the valve body 32 as long as the latching claw 343 engages with the second rotation restricting portion 324.

In the assembling procedure 2, as shown in FIG. 7 to FIG. 9, the lid body 31 is arranged such that the lid body side first separation regulating portion 313 passes between the plurality of second separation regulating portions on the valve body side. Is put on the valve body 32. At this time, the lid peripheral wall 312 is fitted to the valve peripheral wall 322. At this time, as shown in FIG. 9, the second separation restricting portion 323 is accommodated in the recess 316 provided on the inner surface of the lid peripheral wall 312. At this time, as shown in FIG. 9, the lower surface of the convex portion of the first rotation restricting portion 314 pushes the flat portion 341, compresses the pressure regulating valve spring 331, and pushes down the lock body 34. The latching claw 343 of the third rotation restricting portion 342 fitted in the opening constituting the second rotation restricting portion 324 descends within the range of the opening. The lock body 34 cannot rotate with respect to the valve body 32 while being engaged with the opening in the circumferential direction. On the other hand, the lid 31 can rotate with respect to the lock body 34 and the valve body 32.

In the assembling procedure 3, as indicated by arrows in FIG. 10, the lid 31 is rotated in the closing direction (clockwise in the example of FIG. 10) with respect to the lock body 34 and the valve body 32. As a result, the second separation restricting portion 323 accommodated in the concave portion 316 moves into the concave groove 318. At this time, the first separation restriction part 313 enters under the second separation restriction part 323, and the first separation restriction part 313 and the second separation restriction part 323 are hooked. As described above, the lid body 31 and the valve body 32 are assembled such that the first separation restriction portion 313 and the second separation restriction portion 323 are engaged in the up-down direction and cannot be separated. At this time, the convex portion constituting the first rotation restricting portion 314 is fitted into the concave portion constituting the fourth rotation restricting portion 344. As a result, the lid 31 is in a state in which it cannot rotate with respect to the lock body 34. As described above, the lock body 34 cannot rotate with respect to the lock body. For this reason, the lid body 31 is locked to the valve body 32 via the lock body 34 so as not to rotate and is assembled so as not to be separated in the vertical direction. Even if the nozzle collides with the lid in this state, the lid is locked with respect to the valve body, so that loosening of the lid with respect to the valve body is prevented.

As described above, when the first rotation restricting portion 314 is fitted into the fourth rotation restricting portion 344, the locking body 34 causes the latching claw 313 to again be in the second rotation restricting state by the biasing of the pressure regulating valve spring 331. The part 324 is lifted upward until it engages with the upper edge of the opening. At this time, the flat surface portion 34 of the lock body is pressed against the lid surface 311. Thereby, the engagement of the third rotation restricting portion 342 and the second rotation restricting portion 324 becomes close. In other words, the lock body biased away from the valve body by the positive pressure valve spring closely engages the latching claw fitted in the opening in the rotation direction and the vertical direction, and the lock body is engaged with the valve body. It can be made stable and unable to rotate. Further, the lid 31 is also pushed up by the lock body 34 that is lifted by the bias of the pressure regulating valve spring 331. Thereby, the engagement of the first separation restriction part 313 and the second separation restriction part 323 becomes close. The lid 31 and the valve body 32 are assembled tightly in a state where there is no backlash.

Next, the disassembling procedure of the flapper valve 3 of this embodiment will be described. As described above, the second separation restricting portion 323 and the first rotation restricting portion 314 can be seen from the communication hole 315 in a state where the lid 31 and the valve body 32 are assembled. For this reason, as described above, the engagement state of the first separation restriction portion 313 and the second separation restriction portion 323 can be confirmed from the outside through the communication hole 315. Further, the latching claw 343 of the third rotation restricting portion 342 is pushed inward in the radial direction from another communication hole 315 to release the latching between the second rotation restricting portion 324 and the third rotation restricting portion 342. be able to. Thereby, the lid 31 and the valve body 32 can be disassembled.

In the disassembling procedure 1, the lid body 31 and the lock body 34 are pushed down against the pressure regulating valve spring 331 as indicated by the black arrows in FIG. Thereby, the engagement between the latching claw 343 and the second rotation restricting portion 324 is loosened. Through the communication hole 315, the latching claw 343 of the third rotation restricting portion 342 is pushed inward in the radial direction, as indicated by the white arrow in FIG.
Since the third rotation restricting portion 342 is made of a synthetic resin material having elasticity, the warp claw 343 can be easily pushed in. The latching claws 343 are respectively engaged with the second rotation restricting portion 324 at two point symmetrical positions. A jig for pushing the latching claws 343 may be prepared so that the two latching claws 3423 can be pushed simultaneously or sequentially.

In the disassembling procedure 2, as shown in FIG. 12, the lid body 31 and the lock body 34 are rotated together with the valve body 32 in the opening direction (counterclockwise in FIG. 12). Thereby, the 1st separation control part 313 and the 2nd separation control part 323 shift in the circumferential direction position. When the second separation restricting portion 323 reaches the recess 316 provided on the inner surface of the lid peripheral wall 312, the valve body 32 and the lid body 31 can be separated. At this time, when the lid body 31 and the lock body 34 are integrally rotated in the closing direction in a plan view with respect to the valve body 32, the latching claw 343 is again engaged with the second rotation regulating portion 324 and the first separation regulation is performed. The part 313 and the second separation restricting part 323 are engaged with each other and the assembly is completed.

In the disassembling procedure 3, the lid body 31 is separated from the valve body 32 as shown in FIG. At the same time, the lock body 34 can be separated from the valve body 32. As described above, in the flapper valve 3 of the present embodiment, the lid body 31 and the valve body 32 can be assembled and disassembled without being elastically deformed. In the flapper valve 3 of the present embodiment, for example, in a defective product inspection for a finished product, the lid body 31, the valve body 32, or the lock body 34 regarded as a defective product can be replaced individually or simultaneously. Thereby, the defect rate of the flapper valve 3 can be reduced.

In the flapper valve of the fuel filler closing device of the present embodiment, the lid body and the valve body can be firmly assembled without requiring an elastic deformation portion, and the lid body can be prevented from loosening. Examples of the synthetic resin material having high mechanical strength that constitutes the lid and the valve body include PPS resin and PBT resin. Since the lid body or the valve body does not need to be elastically deformed, the lid body or the valve body may be constituted by, for example, a conductive sheet metal member. Moreover, you may make a synthetic resin material contain a conductive material. Examples of the elastically deformable synthetic resin material constituting the lock body include POM resin and PA66 resin.

1 Refueling port closing device 2 Device body
21 Refueling port
22 Gun guide 3 Flapper valve
31 lid
311 Lid plane
312 Lid wall
313 First Separation Control Department
314 1st rotation regulation part
315 communication hole
316 recess
317 Operation unit
318 groove
32 Disc
321 Plane plane
322 Valve wall
323 Second Separation Control Department
324 Second rotation restricting section
325 Rotating arm
326 Seal Ring
327 Through hole
328 Mating part
33 Pressure regulating valve
331 Positive pressure valve spring
34 Lock body
341 Flat part
342 Third rotation restricting section
343 Claw
344 Fourth Rotation Restrictor 4 Oil Supply Pipe

Claims (6)

A flapper valve that is rotatably supported with respect to a device main body of a fuel filler closing device that is fixed inside a fuel filler pipe and has a fuel filler opening,
The flapper valve has a lid, a valve body, a pressure regulating valve, a lock body, and a pressure regulating valve spring that biases the pressure regulating valve.
The pressure regulating valve, the lock body, and the pressure regulating valve spring are assembled between the lid body and the valve body in a state where the lid body and the valve body are assembled.
The lock body is engaged with the lid body while being urged against the lid body by the pressure regulating valve spring, and is also engaged with the valve body so that the lock body cannot rotate with respect to the valve body,
A flapper valve for an oil filler closing device in which a lid body is locked in a state in which it cannot rotate with respect to a valve body via a lock body. The lid body regulates rotation of the lid body in a direction in which the lid body is unlocked with respect to the valve body, a ring-shaped lid body peripheral wall extending downward from the lid body plane, and on the inner surface of the lid body. A first rotation restricting portion that is arranged, and a plurality of first separation restricting portions that are arranged on an inner surface of the cover peripheral wall and restrict the separation of the cover and the valve body, and an end of the cover peripheral wall Is an opening shape,
The valve body regulates the rotation of the valve body plane, the annular valve body peripheral wall extending upward from the valve body plane, and the direction in which the lid body is unlocked with respect to the valve body, and is arranged on the valve body peripheral wall. A second rotation restricting portion that engages with the third rotation restricting portion of the lock body, and a plurality of second separation restricting portions that are arranged on the outer surface of the valve body peripheral wall and restrict the separation of the lid and the valve body. And the end of the peripheral wall of the valve body has a shape that becomes an opening,
The lock body includes a third rotation restricting portion that engages with the second rotation restricting portion provided on the peripheral wall of the valve body, and a fourth rotation restricting portion that engages with the first rotation restricting portion provided on the inner surface of the lid. ,
By separating the plurality of first separation restriction portions arranged on the lid body from the plurality of second separation restriction portions arranged on the valve body, the separation of the lid body and the valve body is prevented,
By engaging the third rotation restricting portion of the lock body with the second rotation restricting portion provided on the valve body peripheral wall, the lock body is prevented from rotating relative to the valve body and the lock body and the valve body are separated. Prevent
By engaging the fourth rotation restricting portion of the lock body with the first rotation restricting portion provided on the inner surface of the lid body with the lock body pressed against the lid body by the pressure regulating valve spring, The flapper valve according to claim 1, which prevents the lid body from rotating in the unlocking direction with respect to the valve body. The first rotation restricting portion disposed on the inner surface of the lid is a convex portion,
The flapper valve according to claim 2, wherein the fourth rotation restricting portion of the lock body is a concave portion that engages with the convex portion. The plurality of first separation restricting portions provided on the lid are protrusions extending in the circumferential direction of the inner surface of the lid peripheral wall,
The flapper valve according to claim 2 or 3, wherein the plurality of second separation restricting portions provided on the valve body are protrusions extending in a circumferential direction of the outer surface of the valve body peripheral wall. The second rotation restricting portion provided in the valve body is an opening penetrating the valve body peripheral wall,
The lock body is a shape having a flat surface,
The flapper valve according to any one of claims 1 to 4, wherein the third rotation restricting portion includes an arm that extends downward from the flat portion and is formed of an elastic body, and a warp claw that is disposed on a distal end side of the arm. . A fuel filler closing device comprising the flapper valve according to any one of claims 1 to 5.

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