JP2017202803A - Flap valve device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a flap valve device capable of surely preventing a pin member from falling off from a bearing hole even before its main body is inserted into a pipe.SOLUTION: A flap valve device 10 includes a main body 20 inserted and disposed in a pipe, a flap-like valve body 50 pivotally supported on the main body 20, a spring member 80 for energizing the valve body 50 in a closing direction toward one end opening of the main body 20, a first bearing hole 35 formed in the main body 20, a second bearing hole 53 formed in the valve body 50, and a pin member 70 inserted into the first bearing hole 35 and the second bearing hole 53. The pin member 70 is formed with an annular recess 73 at a fixed outer peripheral part. The main body 20 is provided with an elastic fitting piece 40 extending toward the pin member 70 and, in a state where the pin member 70 is inserted into the first bearing hole 35 and the second bearing hole 53, elastically fitted to the annular recess 73.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a flap valve device that is arranged in a pipe and opens and closes an internal flow path of the pipe.

  For example, a fuel injection pipe connected to a fuel filler port is connected to a fuel tank of an automobile. In many cases, a cap is detachably attached to the oil filler port, but there is also a capless structure in which a flap valve is arranged in a pipe. This type of flap valve normally closes the internal flow path of the piping by the urging means, but when the flap valve is pushed by inserting the fuel gun into the fuel filler port, it opens, and when the fuel gun is pulled out from the fuel filler port, The flap valve is closed by the biasing means.

  As this type of conventional technology, the following Patent Document 1 discloses a closing support portion having a cylindrical shape and provided with a boss portion on the outer periphery, and a flap attached to the closing support portion through a cylindrical shaft so as to be opened and closed. And a closure assembly comprising a spring for biasing the flap toward one end of the opening of the closure support portion is inserted into a cylindrical cap-shaped body attached to the opening end of the pipe, and the boss of the closure support portion is inserted. A fuel injection pipe head with a closure assembly is described that is configured to engage and attach a portion to a notch in the body.

Special table 2010-522118 gazette

  In the fuel injection pipe head of Patent Document 1, the shaft for attaching the flap to the closing support portion so as to be openable / closable is prevented from coming off by inserting the closing assembly into the main body. Before insertion into the shaft, the shaft did not have any retaining structure, and the shaft could fall out from the flap or the bearing hole of the opening / closing support portion.

  Accordingly, an object of the present invention is to provide a flap valve device that can reliably prevent the pin member from dropping out of the bearing hole even before the main body is inserted into the pipe.

  In order to achieve the above object, the present invention is a flap valve device that is installed in a pipe and opens and closes an internal flow path of the pipe, and is a cylindrical main body that is inserted and arranged in the pipe, and the main body A flap-shaped valve body that is pivotally supported by the main body and opens and closes one end opening of the main body, a spring member that normally biases the valve body toward the one end opening of the main body in a closing direction, and the main body. A first bearing hole formed, a second bearing hole formed in the valve body and arranged coaxially with respect to the first bearing hole, and inserted into the first bearing hole and the second bearing hole. A pin member pivotally supporting the valve body on the main body, the pin member being in a state where the main body is not disposed in the pipe and the first bearing hole and the first 2 can be inserted into the bearing hole, and an annular recess is formed at a predetermined axial position on the outer periphery thereof. In a state where the body is arranged in the pipe, it is configured to be restrained and prevented from coming off by the inner peripheral surface of the pipe, and the main body is directed from the predetermined position of the main body toward the pin member. An elastic fitting piece that extends and elastically fits into the annular recess in a state where the pin member is inserted into the first bearing hole and the second bearing hole is provided.

  According to the flap valve device of the present invention, the pin member is inserted into the first bearing hole of the main body and the second bearing hole of the valve body before the main body is inserted and arranged in the pipe. Since the elastic fitting piece is fitted, the pin member can be retained while being pivotally supported on the main body via the pin member, and before the flap valve device is installed in the pipe The pin member can be reliably prevented from falling off from the first bearing hole or the second bearing hole. In the state where the main body is disposed in the pipe, the pin member is regulated by the inner peripheral surface of the pipe and is prevented from coming off, so that the pin member does not fall off from the first bearing hole or the second bearing hole. .

It is a disassembled perspective view which shows one Embodiment of the flap valve apparatus of this invention. It is an expansion perspective view of the flap valve device. It is a cross-sectional enlarged perspective view of FIG. In the flap valve device, the pin member insertion work process is shown, (a) is a perspective view of the state before inserting the pin member into each bearing hole, and (b) is the pin member inserted into each bearing hole. It is a perspective view of a state. It is a perspective view of the state which installed the flap valve apparatus in piping. In the flap valve apparatus, it is a principal part expanded sectional view when it sees from the axial direction of a pin member. The modification of the elastic fitting piece which comprises the flap valve apparatus is shown, (a) is an expanded sectional view of the elastic engagement piece of a 1st modification, (b) is the elastic engagement piece of a 2nd modification. (C) is an expanded sectional view of the elastic engagement piece of a 3rd modification. The modification of the elastic fitting piece is shown, (a) is an expanded sectional view of the elastic engagement piece of the 4th modification, (b) is an expanded sectional view of the elastic engagement piece of the 5th modification, c) is an enlarged cross-sectional view of the elastic engaging piece of the sixth modified example, (d) is an enlarged cross-sectional view of the elastic engaging piece of the seventh modified example, and (e) is an enlarged view of the elastic engaging piece of the eighth modified example. It is sectional drawing. It is a section explanatory view showing the state where the oil supply gun was inserted in piping in the flap valve device.

  Hereinafter, an embodiment of a flap valve device according to the present invention will be described with reference to the drawings.

  As shown in FIG. 8, a flap valve device 10 (hereinafter referred to as “valve device 10”) in this embodiment is installed in a pipe 1 and opens and closes its internal flow path. The pipe 1 in this embodiment is a fuel injection pipe that is connected to the fuel tank and injects fuel into the fuel tank. And this valve apparatus 10 is installed in the edge part by the side of the oil supply port of the piping 1, and always closes a fuel supply port, and when the fuel supply gun 3 is inserted in this fuel supply port, it is comprised so that a fuel supply port may open. Therefore, a capless structure that does not require an oiling cap is realized. In addition, as a flap valve device in the present invention, any valve device that is installed in a pipe and opens and closes the internal flow path of the pipe may be used. It is not limited.

  As shown in FIG. 1, the valve device 10 in this embodiment is inserted and arranged in a pipe 1, and a cylindrical main body 20 in which the inside forms a fluid flow path, and is pivotally supported by the main body 20. A flap-shaped valve body 50 that opens and closes one end opening 21 of the 20, a spring member 80 that normally biases the valve body 50 toward the one end opening 21 of the main body 20, and a valve on the main body 20. It has the pin member 70 which pivotally supports the body 50 so that rotation is possible.

  First, the main body 20 will be described.

  As shown in FIGS. 1 to 3, the main body 20 of this embodiment has a substantially cylindrical shape having one end opening 21 on one end side and the other end opening 23 on the other end side. On the other end side of the main body 20, an annular portion 25 having an annular diameter is provided, and the annular portion 25 is engaged with the edge of the opening of the end of the pipe 1 (see FIG. 8). Further, an extending insertion portion 27 is formed from one end of the annular portion 25 so as to be eccentric with respect to the axial center of the main body 20 and gradually reduce in diameter toward the one end opening 21 side (see FIGS. 2 and 3). . Further, as shown in FIGS. 3 and 8, a tubular portion 29 having a constant diameter extends from the one end opening 21 side of the insertion portion 27, and a flange-shaped valve seat 31 spreads from the outer peripheral edge of the end portion. The valve body 50 contacts and separates from the valve seat 31 to open and close the one end opening 21.

  As shown in FIGS. 2 and 3, from the outer peripheral surface of the insertion portion 27 of the main body 20, a pair of first bearing portions 33, 33 having an arm shape are parallel to each other at a predetermined interval, and the main body The tip portions 34, 34 are provided so as to protrude outward from the one end opening 21 in the axial direction of the main body 20. Each tip 34 is formed with a circular first bearing hole 35 into which the pin member 70 is inserted. Further, as shown in FIGS. 2 and 4, spring locking portions 36 and 36 are provided inside the pair of first bearing portions 33 and 33, and the other ends of the coil portions 81 and 81 of the spring member 80. The portions 81a and 81a are locked.

  2 and 3, the outer peripheral surface of the insertion portion 27 and the tubular portion 29 of the main body 20 near the one end opening 21, and between the pair of first bearing portions 33 and 33. The protrusion 37 is provided in a protruding manner.

As shown in FIGS. 1 to 3, the first bearing holes 35, 35 and the second bearing hole 53, which will be described later, of the valve body 50 extend from the front end surface of the projecting portion 37 toward the pin member 70. An elastic fitting piece 40 that is elastically fitted into an annular recess 73 described later of the pin member 70 in a state where the pin member 70 is inserted into the pin member 70 is provided.
As shown in FIGS. 1 and 3, a plate-like protruding piece 38 protrudes outward in the axial direction of the main body 20 from the one end opening 21 side from the tip end surface of the protruding portion 37 on the one end opening 21 side. ing.

  As shown in FIGS. 1 and 3, the elastic fitting piece 40 of this embodiment is located outwardly in the axial direction of the main body 20 from the tip end surface on the one end opening 21 side of the protrusion 37 than the one end opening 21. And a distal end portion 43 extending from the distal end of the base portion 41 so as to form a strip having a narrower width and a constant width than the base portion 41. As shown in FIG. 6, the elastic fitting piece 40 has a bent portion 43 a (hereinafter referred to as a “bent portion”), as viewed from the axial direction of the pin member 70. 43a "), and the bent portion 43a is configured to fit into the annular recess 73.

  In this embodiment, the elastic fitting piece 40 extends toward the pin member 70 along the axial direction of the main body 20 (here, the axial direction of the pipe 1) except for the bent portion 43a of the base portion 41 and the distal end portion 43. The bent portion 43a is in a direction intersecting the axial direction of the pipe 1 (here, a direction substantially perpendicular to the plane of the distal end portion 43) and the outer diameter direction of the main body 20 (here, the pipe). 1 in a direction away from the central axis C), and has a substantially L-shaped frame shape (see FIG. 6).

  And when the elastic fitting piece 40 is seen from the axial direction of the pin member 70, the front-end | tip part 43 of the extending direction is the peripheral surface of the annular recessed part 73 of the pin member 70 at the opening direction side of the valve body 50, The pipe 1 is fitted to the peripheral surface on the central axis C side. In this embodiment, as shown in FIG. 6, the bent portion 43 a of the distal end portion 43 of the elastic fitting piece 40 is fitted to the circumferential surface of the annular recess 73 of the pin member 70 on the opening direction side of the valve body 50. A portion of the distal end portion 43 adjacent to the bent portion 43 a is fitted to the circumferential surface of the annular recess 73 on the central axis C side of the pipe 1. In addition, as shown in FIG. 2, the elastic fitting piece 40 has a pair of bearing portions described later of the valve body 50 in a state where the valve body 50 is pivotally supported on the main body 20 via a pin member 70. 51 and 51 are arranged.

  In addition, as an elastic fitting piece, it is not limited to the said shape, For example, the shape shown to FIG.7 (a)-(c) and FIG.8 (a)-(e) may be sufficient, The number may be two or more.

  In the elastic fitting piece 40a of FIG. 7A, the distal end portion 43 is not bent, and the unbent distal end portion 43 of the annular recess 73 of the pin member 70 of the annular recess 73 of the pipe 1 is obtained. It fits on the peripheral surface on the center axis C side.

  Further, the elastic fitting piece 40b of FIG. 7B has a base portion 41 extending obliquely inward from a predetermined location of the main body 20 toward the central axis C of the pipe 1, and a distal end portion 43 in the extending direction. However, it intersects the axial direction of the main body 20 and is bent toward the outer diameter direction of the main body 20. And the front-end | tip part 43 fits to the surrounding surface at the side of the opening direction of the valve body 50 of the annular recessed part 73 of the pin member 70. As shown in FIG.

  Further, the elastic fitting piece 40c in FIG. 7C includes a base 41 extending from a predetermined portion of the main body 20 toward the pin member 70, and a pair of bent from the distal end of the base 41 so as to be bifurcated. It has the front-end | tip parts 43 and 43, and has comprised the substantially Y shape as a whole. And a pair of front-end | tip parts 43 and 43 are fitted so that the surrounding surface by the side of the central axis C of the piping 1 of the annular recessed part 73 of the pin member 70, and the surrounding surface which opposes it may be pinched | interposed. .

  Further, the elastic fitting piece 40d of FIG. 8A has a base portion 41 extending obliquely inward from a predetermined location of the main body 20 toward the central axis C side of the pipe 1, and a distal end portion 43 in the extending direction. The pipe 1 is bent so as to extend along the central axis C. And the front-end | tip part 43 fits to the surrounding surface at the side of the central axis C of the piping 1 of the annular recessed part 73. As shown in FIG.

  Further, in the elastic fitting piece 40e of FIG. 8B, the base portion 41 extends from a predetermined portion of the main body 20 along the axial direction of the pipe 1, and the distal end portion 43 in the extending direction is the central axis C of the pipe 1. It is bent at an angle toward the direction away from it. And the front-end | tip part 43 fits diagonally outward with respect to the surrounding surface on the opposite side to the surrounding surface of the opening direction side of the valve body 50 of the annular recessed part 73. As shown in FIG.

  The elastic fitting piece 40f in FIG. 8C has a base 41 extending from a predetermined position of the main body 20 along the axial direction of the pipe 1, and a distal end 43 in the extending direction is on the central axis C side of the pipe 1. It is bent at an angle toward. And the front-end | tip part 43 fits diagonally inward with respect to the surrounding surface on the opposite side to the surrounding surface of the opening direction side of the valve body 50 of the annular recessed part 73. As shown in FIG.

  The elastic fitting piece 40g in FIG. 8D has a predetermined gap with respect to the peripheral surface of the shaft portion 71 of the pin member 70 in the direction away from the central axis C of the pipe 1 from a predetermined portion of the main body 20. The base portion 41 extends, and the distal end portion 43 in the extending direction is bent obliquely toward the central axis C side of the pipe 1. And the front-end | tip part 43 fits diagonally inward with respect to the surrounding surface of the annular recessed part 73 at the opening direction side of the valve body 50. As shown in FIG.

  The elastic fitting piece 40h in FIG. 8 (e) has a base portion 41 with a predetermined gap from a predetermined position of the main body 20 to the peripheral surface of the shaft portion 71 of the pin member 70 on the central axis C side of the pipe 1. The tip 43 in the extending direction is bent obliquely in a direction away from the central axis C of the pipe 1. And the front-end | tip part 43 fits diagonally outward with respect to the surrounding surface of the opening direction side of the valve body 50 of the annular recessed part 73. As shown in FIG.

  As shown in FIGS. 2 to 4, the elastic fitting piece 40 is formed with a tapered surface 45 that is located on the flange portion 77 (described later) side of the pin member 70 and that extends outward on the inner edge portion. Yes. In this embodiment, the distal end portion 43 of the elastic fitting piece 40 is located on the flange portion 77 side of the pin member 70, and gradually spreads outward toward the inner edge (pin member holding side) The taper surface 45 is formed up to the bent portion 43a.

  Next, the valve body 50 attached to the main body 20 so as to be openable and closable will be described.

  As shown in FIG. 1, the valve body 50 of this embodiment has a disk shape that fits the one end opening 21 of the main body 20, and is arranged in parallel to each other at a predetermined interval from a predetermined position in the circumferential direction. A pair of 2nd bearing parts 51 and 51 are extended toward the outer-diameter direction. A circular second bearing hole 53 into which the pin member 70 is inserted is formed in each second bearing portion 51 so as to be coaxially disposed with respect to the first bearing hole 35 of the main body 20. By inserting the pin member 70 into the second bearing hole 53 and the first bearing hole 35 of the main body 20, the valve body 50 is pivotally supported on the main body 20 via the pin member 70.

  As shown in FIG. 2, in this embodiment, the pair of second bearing portions 51, 51 are configured so that the valve body 50 is pivotally supported on the main body 20 via the pin member 70. It is arranged inside the pair of first bearing portions 33, 33 of the main body 20 and outside the elastic fitting piece 40.

  In addition, the number of the first bearing portion 33 on the main body 20 side, the number of the second bearing portions 51 on the valve body 50 side, the arrangement relationship, and the like are not particularly limited. For example, the second bearing portion 51 of the valve body 50, 51 may be arranged outside the first bearing portions 33, 33 of the main body 20, and the first bearing hole 35 and the second bearing hole 53 are aligned so as to be coaxial, and the pin member 70 is interposed therebetween. As long as the valve body 50 can be pivotally supported on the main body 20, any structure may be used.

  Further, as shown in FIGS. 1 and 2, a pair of second bearing portions 51, 51 is provided with a spring bearing having a substantially oval shape whose diameter is larger than that of the second bearing portion 51 on the outer surface side away from each other. Plates 54, 54 are provided. The spring receiving plate 54 is in wide contact with a later-described coil portion 81 of the spring member 80 so that the coil portion 81 can be stably held (see FIG. 2).

  In addition, as shown in FIG. 2, on the surface side of the valve body 50 (on the side opposite to the contact / separation surface with the valve seat 31 of the main body 20), Spring support protrusions 52 and 52 are provided so as to protrude. Further, as shown in FIGS. 3 and 8, a cylindrical portion 55 having a cylindrical shape protrudes from the center of the back surface side of the valve body 50 (the contact surface side with the valve seat 31 of the main body 20). A plurality of engaging holes 57 are formed in the cylindrical portion 55.

  Further, on the back surface side of the valve body 50, a thin annular seal member 60 is disposed, which is made of rubber, elastomer, or the like, and a peripheral edge 61 on the outer diameter side has a Y-shaped cross section (see FIG. 3). The seal member 60 is fixed to the valve body 50 via a fixing member 65. The peripheral edge 61 of the seal member 60 abuts against the valve seat 31 of the main body 20, whereby the one end opening 21 of the main body 20 is sealed in a closed state (see FIG. 3).

  Furthermore, the fixing member 65 that fixes the seal member 60 to the valve body 50 has a plurality of engaging claws 66 protruding from the surface side (the arrangement surface side of the seal member 60) (see FIG. 1). A pressing protrusion 67 protrudes from a predetermined circumferential direction of the fixing member 65 toward the outer diameter direction. When the oiling gun 3 is inserted into the main body 20, the pressing protrusion 67 is provided with the oiling gun 3. The valve body 50 is opened by being pressed by the tip portion 3.

  And while inserting the cylindrical part 55 of the valve body 50 in the center part inner periphery of the sealing member 60, the some engaging claw 66 of the fixing member 65 is inserted in the cylindrical part 55, and each engaging claw 66 is inserted. The seal member 60 is sandwiched and fixed between the valve body 50 and the fixing member 65 by engaging each engagement hole 57 of the cylindrical portion 55 from the inside (see FIGS. 3 and 8). In addition, without providing the seal member 60, the seal surface side of the valve body 50 may be brought into direct contact with the valve seat 31 of the main body 20, and there is no particular limitation.

  Next, the pin member 70 that is inserted into the first bearing hole 35 of the main body 20 and the second bearing hole 53 of the valve body 50 and pivotally supports the valve body 50 on the main body 20 will be described.

  The pin member 70 in this embodiment is formed of metal and has a cylindrical shaft portion 71. An annular recess 73 having a predetermined depth is formed on the outer periphery of a predetermined axial direction portion (here, substantially the center in the axial direction) of the shaft portion 71, and the elastic fitting piece 40 is elastically inserted into the annular recess 73. It is designed to fit.

  As shown in FIG. 4, the pin member 70 can be inserted into the first bearing hole 35 and the second bearing hole 53 in a state where the main body 20 is not disposed in the pipe 1. As shown in FIG. 2, the main body 20 is arranged on the pipe 1 so as to be restrained by the inner peripheral surface of the pipe 1 and to be prevented from coming off.

  Further, the shaft portion 71 is a tip portion on the insertion direction side into the first bearing hole 35 and the second bearing hole 53, and a tapered surface 75 having a tapered shape is formed on the outer periphery of the tip portion. When the pin member 70 is inserted into the first bearing hole 35 or the second bearing hole 53 from the distal end side, it is easy to insert (see FIG. 4A).

  Further, a flange portion 77 extending on the outer periphery is formed at the base end portion of the shaft portion 71 of the pin member 70 on the side opposite to the insertion direction into the first bearing hole 35 and the second bearing hole 53, The flange portion 77 is engaged with the peripheral edge of the first bearing hole 35 or the second bearing hole 53 (here, engaged with the first bearing hole 35) (see FIG. 4).

  The shape of the pin member is not particularly limited as long as it has at least an annular recess that is elastically fitted to the elastic fitting piece, and a plurality of elastic fitting pieces are provided in the main body. In some cases, a plurality of annular recesses may be formed correspondingly, and there is no particular limitation.

  As shown in FIG. 1, the spring member 80 in this embodiment has a so-called double torsion structure composed of two coil portions 81, 81 and a connecting portion 83 that connects one end portions of the coil portion 81. It is a torsion spring. As shown in FIG. 2, the elastic fitting piece 40 provided on the main body 20 side and the annular recess 73 of the pin member 70 are arranged between the two coil portions 81, 81 of the spring member 80. It is configured.

  The spring member 80 urges the valve body 50 in the closing direction toward the one end opening 21 of the main body 20, the peripheral edge 61 of the seal member 60 contacts the valve seat 31 of the main body 20, and the one end opening 21. Is closed in a closed state (see FIG. 3). In addition, as this spring member, a coil part may be one torsion, for example, and the valve body should just be urged | biased in the direction normally closed toward the one end opening part 21 of a main-body part.

  Next, the assembly procedure and operational effects of the valve device 10 of the present invention having the above-described configuration will be described.

  First, a pair of second bearing portions 51, 51 of the valve body 50 are disposed between the tip portions 34, 34 of the pair of first bearing portions 33, 33 of the main body 20, and the pair of second bearing portions 51, 51 are disposed. 51, the elastic fitting piece 40 of the main body 20 is disposed, and the first bearing hole 35 of each first bearing portion 33 and the second bearing hole 53 of each second bearing portion 51 are coaxially arranged. (See FIG. 4A). Further, the two coil portions 81, 81 of the spring member 80 are disposed between the distal end portion 34 of the first bearing portion 33 and the second bearing portion 51, and the connecting portion 83 is a spring support protrusion of the valve body 50. The other end portion 81a of each coil portion 81 is locked to the spring locking portion 36 inside the first bearing portion 33 (see FIG. 4A).

  In the above state, as shown in FIG. 4A, the pin member 70 is inserted into the first bearing hole 35 from the tip end side. Then, the tip end portion of the pin member 70 is inserted into the first bearing hole 35 via the tapered surface 75, and the shaft portion 71 is inserted into the first bearing hole 35, the coil portion 81, and the second bearing hole 53. It will be done. And the front-end | tip part of the pin member 70 is inserted from the 2nd bearing hole 53, and the axial part 71 of the same pin member 70 is the inner side of the elastic fitting piece 40 via the taper surface 45 (the support side of the pin member 70). In the following description, the elastic fitting piece 40 is elastically deformed outward. When the pin member 70 is further pushed in until the flange portion 77 engages with the outer peripheral edge of the first bearing hole 35, the shaft portion 71 is located on the opposite side of the insertion direction of the pin member 70 from the second bearing hole. 53, the coil portion 81, and the first bearing hole 35, and when the elastically deforming elastic fitting piece 40 reaches the annular recess 73 of the pin member 70, the elastic fitting piece 40 is elastically restored. It fits into the annular recess 73 (see FIG. 4B).

  At this time, as shown in FIG. 6, the elastic fitting piece 40 of this embodiment has a distal end portion 43 bent when viewed from the axial direction of the pin member 70, and the bent portion 43 a forms an annular recess 73. It is comprised so that it may fit. More specifically, the bent portion 43a of the tip portion 43 is fitted to the circumferential surface of the annular recess 73 of the pin member 70 on the opening direction side of the valve body 50, and is adjacent to the bent portion 43a of the tip portion 43. The portion thus fitted fits into the peripheral surface of the annular recess 73 on the central axis C side of the pipe 1.

  As a result, the shaft portion 71 of the pin member 70 is inserted into the pair of first bearing holes 35, 35, the pair of second bearing holes 53, 53, and the two coil portions 81, 81, via the pin member 70. Thus, the valve body 50 can be pivotally supported on the main body 20. In this embodiment, the tip of the pin member 70 is prevented from jumping out from the first bearing hole 35 on the opposite side in the insertion direction (see FIG. 2). Further, in this state, as shown in FIG. 6, since the distal end portion 43 of the elastic fitting piece 40 is fitted at two locations on the peripheral surface of the annular recess 73 of the pin member 70, the pin member 70 is removed. Can be stopped and held.

  As described above, in the valve device 10, the pin member 70 is inserted into the first bearing hole 35 of the main body 20 and the second bearing hole 53 of the valve body 50 before the main body 20 is inserted and arranged in the pipe 1. Thus, since the elastic fitting piece 40 is fitted into the annular recess 73 of the pin member 70, the pin member 70 is retained and retained while the valve body 50 is pivotally supported on the main body 20 via the pin member 70. It is possible to reliably prevent the pin member 70 from dropping from the first bearing hole 35 and the second bearing hole 53 before the valve device 10 is installed in the pipe 1.

  Then, with the valve body 50 assembled to the main body 20, the main body 20 is inserted and arranged in the pipe 1, and the annular portion 25 of the main body 20 is engaged with the peripheral edge of the end opening of the pipe 1. The valve device 10 is installed in the pipe 1 through a retaining means that does not stop (see FIGS. 5 and 8). In a state in which the main body 20 is inserted and arranged in the pipe 1, the pin member 70 is regulated by the inner peripheral surface of the pipe 1 and is prevented from coming off, so that the pin member is removed from the first bearing hole 35 and the second bearing hole 53. 70 does not fall off (see FIG. 5).

  Further, as shown in FIG. 6, the elastic fitting piece 40 in this embodiment has a bent end portion 43 when viewed from the axial direction of the pin member 70 as shown in FIG. For example, even if the elastic fitting piece 40 is bent in the direction of the arrow F1, the bent portion 43a has a depth of the annular recess 73 of the pin member 70. It will move in the direction (see arrow F3) intersecting the direction (see arrow F2), and the fitting of the elastic fitting piece 40 to the annular recess 73 will be difficult to be released. The same applies to the elastic fitting pieces 40b, 40c, 40d, 40e, 40f, 40g, and 40h shown in FIGS. 7 (b), 7 (c), and 8 (a) to 8 (e). Since each tip part 43 fitted in the annular recess 73 of the pin member 70 is bent, the bent tip part 43 is in the depth direction of the annular recess 73 of the pin member 70 even if each elastic fitting piece is bent. Moves in the crossing direction, and the fitting of the elastic fitting piece 40 to the annular recess 73 is difficult to be released.

  Further, as shown in FIG. 6, in this embodiment, the bent portion 43 a of the distal end portion 43 of the elastic fitting piece 40 is fitted to the circumferential surface of the annular recess 73 of the pin member 70 on the opening direction side of the valve body 50. A portion of the distal end portion 43 adjacent to the bent portion 43 a is adapted to be fitted to the peripheral surface of the annular recess 73 on the central axis C side of the pipe 1, and the distal end portion of the elastic fitting piece 40. 43 is fitted in two places on the circumferential surface of the annular recess 73 of the pin member 70, so that even if the elastic fitting piece 40 is bent during insertion of the pin member 70, the annular recess 73 of the pin member 70. Therefore, the tip end portion 43 of the elastic fitting piece 40 can be more difficult to come off, and the pin member 70 can be more reliably prevented from falling off from the first bearing hole 35 and the second bearing hole 53.

  Further, in this embodiment, as shown in FIGS. 2 to 4, the elastic fitting piece 40 has a tapered surface 45 that is located on the flange portion 77 side of the pin member 70 and extends outward on the inner edge portion. Since the pin member 70 is inserted into the first bearing hole 35, the coil portion 81, and the second bearing hole 53 as described above, the pin member 70 is inserted into the elastic fitting piece 40 as described above. Thus, when the pin member 70 is pushed in, the pin member 70 can smoothly enter the inside of the elastic fitting piece 40 and the elastic fitting piece 40 can be easily elastically deformed. Insertion workability can be improved. Further, as shown in FIG. 4, in this embodiment, since the flange portion 77 engages with the outer peripheral edge of the first bearing hole 35 disposed on the insertion direction side of the pin member 70, the pin member 70 is pushed too much. Can be prevented.

  Further, in this embodiment, as shown in FIG. 1, the spring member 80 is a torsion spring having two coil portions 81, and as shown in FIG. 2, the elastic fitting piece 40 and the pin member 70 are annular. Since the recess 73 is configured to be disposed between the two coil portions 81, 81 of the spring member 80, the pin member 70 is used even when the spring member 80 having a so-called double torsion structure is used. The annular recess 73 and the elastic fitting piece 40 fitted thereto can be arranged in a compact and well-balanced position at a lean position.

  As shown in FIG. 8, the valve device 10 installed in the pipe 1 is inserted into the other end opening 23 of the main body 20 as shown in FIG. By pressing the pressing protrusion 67, the valve body 50 opens against the urging force of the spring member 80, and the distal end portion of the oil supply gun 3 can be inserted into the back of the pipe 1. When the fuel gun 3 is pulled out from the pipe 1 and the main body 20 in this state, the urging force of the spring member 80 urges the valve body 50 in the closing direction toward the one end opening 21 of the main body 20. The peripheral edge portion 61 comes into contact with the valve seat 31 of the main body 20, the one end opening 21 of the main body 20 is held in a closed state, and the oil supply port of the pipe 1 can be closed (see FIGS. 3 and 5).

  It should be noted that the present invention is not limited to the above-described embodiment, and various modified embodiments are possible within the scope of the present invention, and such an embodiment is also included in the scope of the present invention. .

1 Piping 10 Flap valve device (valve device)
20 Main body 21 One end opening 35 First bearing hole 40, 40a, 40b, 40c, 40d, 40e, 40f, 40g, 40h Elastic fitting piece 43 Tip 43a Bent part (bent part)
45 Tapered surface 50 Valve body 53 Second bearing hole 60 Seal member 65 Fixing member 70 Pin member 73 Annular recess 77 Flange portion 80 Spring member 81 Coil portion

Claims (5)

A flap valve device that is installed in a pipe and opens and closes an internal flow path of the pipe,
A cylindrical main body inserted and arranged in the pipe;
A flap-shaped valve body that is pivotally supported by the main body and opens and closes one end opening of the main body;
A spring member that normally biases the valve body in a direction to close toward the one end opening of the main body,
A first bearing hole formed in the body;
A second bearing hole formed in the valve body and disposed coaxially with respect to the first bearing hole;
A pin member that is inserted into the first bearing hole and the second bearing hole and pivotally supports the valve body on the main body;
The pin member can be inserted into the first bearing hole and the second bearing hole in a state where the main body is not disposed in the pipe, and an annular recess is formed at a predetermined axial position on the outer periphery thereof. And in a state where the main body is arranged in the pipe, the main body is configured to be regulated by the inner peripheral surface of the pipe and to be prevented from coming off,
The main body is elastically fitted into the annular recess with the pin member inserted into the first bearing hole and the second bearing hole, extending from a predetermined position of the main body toward the pin member. A flap valve device characterized in that an elastic fitting piece is provided.   The elastic fitting piece is configured such that when viewed from the axial direction of the pin member, a distal end portion in an extending direction is bent, and the bent portion is fitted into the annular recess. The flap valve device according to 1.   When the elastic fitting piece is viewed from the axial direction of the pin member, the distal end portion in the extending direction is the peripheral surface of the annular recess of the pin member on the opening direction side of the valve body, and the center of the pipe The flap valve device according to claim 1 or 2, wherein the flap valve device is fitted to a peripheral surface on the shaft side. The pin member has a flange that engages with a peripheral edge of the first bearing hole or the second bearing hole at a base end portion opposite to the insertion direction into the first bearing hole and the second bearing hole. Part is formed,
The flap according to any one of claims 1 to 3, wherein the elastic fitting piece is formed with a tapered surface that is located on the flange portion side of the pin member and extends outward at an inner edge portion. Valve device. The spring member is a torsion spring having two coil portions,
The flap valve according to any one of claims 1 to 4, wherein the elastic fitting piece and the annular recess of the pin member are configured to be disposed between two coil portions of the spring member. apparatus.