JP2014205446A - Sub closing device of fuel filler port closing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make a sub closing device compact so as to make a fuel filler port closing device, comprising a main closing device and the sub closing device, compact on the whole.SOLUTION: There is provided a sub closing device 2 that comprises an upper-stage base 22 and a lower-stage base 23 which are flat plates crossing an insertion direction of a fuel feed nozzle and provided with a through hole 221 for the fuel feed nozzle 5; a link arm 25 which swings around a link swing shaft 222 positioned at and fixed to the upper-stage base 22 while avoiding the upper-stage through hole 221, and is energized to approach the upper-stage through hole 221; and a left shutter 26 and a right shutter 27 which swing around a left swing shaft positioned at and fixed to the lower-stage base 23 from positions where the lower-stage through hole is closed to positions where the lower-stage through hole is opened. The link arm 25 protrudes a trigger projection 252 within a range of the upper-stage through hole 221, and the link arm 25 and left shutter 26 are connected by engagement between a link interlocking cam groove 251 provided in the link arm 25 and a link interlocking pin 266 provided on the left shutter 26.

Description

  The present invention constitutes a fuel filler closing device together with the main closure device, and is located above the main shutter of the main closure device pushed open by the fuel nozzle inserted from the fuel filler so that dust or the like does not collect in the main shutter. In particular, the present invention relates to a sub-closing device of a fuel filler closing device that opens and closes in conjunction with a fuel nozzle inserted from a fuel filler.

  2. Description of the Related Art In recent years, a fuel filler closing device including a sub-shutter that is pushed and opened by a fuel nozzle inserted from an opened fuel filler is seen. In view of the refueling operation, the refueling port closing device is configured so that only the refueling nozzle of the refueling gun is inserted up to the sub shutter, and the sub shutter is refueled so that the handle portion of the refueling gun is hooked and held on the refueling port. It is often configured at a position deep from the mouth. For this reason, there is a concern that dust or the like may enter and accumulate from the fuel filler opening to the sub shutter. Therefore, the sub shutter of the sub closing device is provided above the main shutter of the main closing device that seals the fuel filler opening. May be.

  Patent Document 1 is provided with a main closing device (first valve device) in which a valve element is pushed open to an oil supply nozzle inserted from an oil supply port (outer end side of a passage), and above (outside) the main closing device. A fuel filler closing device (fuel filler opening and closing device) comprising a sub-closing device (second valve device) that allows a valve body to be pushed open to a fuel filler nozzle inserted from a fuel filler port and to allow passage of the fuel nozzle. Disclose. The fuel filler closing device disclosed in Patent Document 1 is configured such that each of the auxiliary closing device and the main closing device is a valve body that is pushed by the fuel nozzle and rotates downward (Patent Document 1 [Claim 1]. ]).

  Specifically, the valve body of the main closing device constituting the fuel filler closing device is pushed open with a lower load than the valve body of the auxiliary closing device (Patent Document 1 [Claim 1]). The valve body of the device and the valve body of the auxiliary closing device are arranged close to the insertion direction of the fueling nozzle (the axial direction of the passage) within a range that does not impede the operation of each other (Patent Document 1 and Claim 2). Thus, the oil supply nozzle inserted from the oil supply port surely opens the valve body of the main closing device following the valve body of the sub-closing device (Patent Document 1, [0011]).

JP 2012-162165 A

  It is desirable that the sub-closing device be opened by detecting that the fuel nozzle is inserted from the fuel filler port and not open unless the fuel nozzle is inserted. In this regard, the sub-closing device disclosed in Patent Document 1 is configured by a valve body that is pushed by the fueling nozzle and opens downward, and therefore, the valve body is configured to open only when pushed by the fueling nozzle. However, since the valve body is configured to push downward, the main closing device and the auxiliary closing device must be arranged at least apart from the operating range of the valve body of the auxiliary closing device. It is difficult to reduce the size of the fuel filler closing device including the device.

  The main closing device is responsible for preventing fuel backflow and preventing fuel vapor transpiration, and therefore the configuration or structure of the main closing device is likely to be complicated, and as a result, it is difficult to reduce the size. On the other hand, the configuration or structure of the auxiliary closing device is not particularly limited as long as it can close the through-hole through which the oil supply nozzle passes only to prevent the intrusion of dust. Therefore, in order to reduce the size of the entire fuel filler closing device composed of the main closing device and the auxiliary closing device, to reduce the size of the auxiliary closing device (shortening the insertion direction of the oiling nozzle and reducing the cross-sectional area) The configuration or structure of the secondary closing device was examined.

  What has been developed as a result of the study is above the main closing device of the filling port closing device pushed open by the filling nozzle inserted from the filling port, so that dust etc. does not reach the main closing device. A sub-closing device for a fuel filler closing device that is opened and closed by being pressed by a flat plate that intersects the insertion direction of the fuel nozzle, a base provided with a through-hole for the fuel nozzle, and a link swing fixed to the base A link arm that oscillates around the shaft avoiding the through hole and is biased in a direction approaching the through hole, and a position that closes the through hole around the auxiliary shutter rocking shaft that is fixed to the base. The link arm consists of a sub-shutter that swings to the position where the through-hole is opened, and the link arm projects a trigger projection pushed away from the through-hole by the oiling nozzle to be inserted into the range of the through-opening. The arm and the sub shutter, a secondary closure device of the fuel supply port closing device, characterized in that linked by the engagement of the link interlocking pin provided in the link interlocking cam groove and the other provided on one.

  The sub-closing device of the present invention includes a swinging surface of a link arm that swings when pushed by a fueling nozzle, a swinging surface of a sub-shutter that swings in conjunction with the link arm, and a through opening that is opened and closed by the sub-shutter. The base provided with the mouth is in a layered relationship, and the total thickness of the link arm, the base, and the sub shutter can be shortened in the direction of inserting the fuel nozzle. If the base is divided into an upper base provided with a link swing shaft and a lower base provided with a sub shutter swing shaft, the degree of freedom of arrangement of the link arm and the sub shutter is improved. The through hole is provided at a position where the upper base and the lower base communicate with each other. Even in the sub-closure device in which the base is divided into the upper and lower stages, the total thickness of the link arm, the upper stage base, the sub-shutter and the lower stage base is sufficient, and it can be shortened in the insertion direction of the fuel nozzle.

  The link arm swings in a direction away from the through-hole when the trigger projection is pushed away from the through-hole by the oil-filling nozzle inserted from the oil-filling port, and approaches the through-hole according to the bias when the oil-off nozzle is pulled out. Swing in the direction. The sub-shutter has a through-opening through the other of the link interlocking cam groove or the link interlocking pin engaged with one of the link interlocking cam groove or the link interlocking pin provided on the link arm that swings away from the through opening. When the link interlocking cam groove or link interlocking pin engaged with one of the link interlocking cam groove or link interlocking pin provided on the link arm that swings in the direction approaching the through hole is swung to the opening position. It swings to the position that closes the through hole.

  The link arm may be provided with an inclined edge or inclined surface having a downward slope in the protruding direction on the upper surface of the trigger protrusion. As a result, the oil supply nozzle inserted from the oil supply port is first inclined by pushing the trigger projection away from the through-hole while pushing the inclined edge or inclined surface in the insertion direction, and swinging the link arm away from the through-hole. When it comes to the stage where the side comes into contact with the tip of the trigger projection (the end protruding into the range of the through-hole) by deviating from the edge or the inclined surface, the link arm that tries to swing in the direction approaching the through-hole by biasing Can be pressed down. The link arm may be urged in a direction approaching the through hole by a spring supported by the base. The spring includes a coil spring that exhibits a restoring force that expands and contracts by a swinging link arm, and a leaf spring that exhibits a restoring force by being elastically deformed by a swinging link arm.

  The sub-shutter is composed of a left shutter and a right shutter that are double-split. The left shutter is a link interlocking cam groove and link interlocking that connects the link arm and the left shutter at a position away from the left swing shaft fixed to the base. One of the pins and one of a shutter interlocking cam groove and a shutter interlocking pin for connecting the left shutter and the right shutter are provided, and the right shutter is located at a position away from the right swing shaft fixed to the base. A configuration in which the other of the shutter interlocking cam groove and the shutter interlocking pin for connecting the right shutter is provided. Thereby, each swing angle required for the left shutter and the right shutter to open the through-hole can be reduced, that is, the movable range of the left shutter and the right shutter can be reduced, and the cross-sectional area occupied by the auxiliary closing device can be reduced.

  Here, the “left shutter” and the “right shutter” are for convenience of explanation, and when the both oscillating shafts (the left oscillating shaft and the right oscillating shaft) are disposed above in the plan view, An element located on the left side of the plane is referred to as a “left shutter”, and an element located on the right side of the plane is referred to as a “right shutter”, and each part is referred to as “left to” or “right to”. The left shutter and the right shutter may be asymmetrical as long as both are combined to close the through hole, but the entire shape of each of the left shutter and the right shutter is circular except for the arm connected to each swing shaft. It is desirable to have a bilateral symmetry similar to a half circle. Thereby, the swing angles of the left shutter and the right shutter can be made equal, and the respective movable ranges can be kept to a minimum.

  The auxiliary closing device of the fuel filler closing device according to the present invention includes a link arm and a secondary shutter that swing in parallel with a base provided with a through-hole through which the fuel nozzle is penetrated, and can be shortened in the insertion direction of the fuel nozzle. In addition, the sub-closing device of the present invention divides the sub-shutter into the left shutter and the right shutter, thereby reducing the movable range of the left shutter and the right shutter and reducing the cross-sectional area. In this way, the whole fuel filler closing device provided with the auxiliary closing device of the present invention can be reduced in size. In addition, the sub-closing device of the present invention can be configured as a module in which the link arm, the base and the sub-shutter are integrated, which is easy to handle and facilitates assembly of the fuel filler closing device.

  The trigger protrusion provided with the inclined edge or the inclined surface swings the link arm in the direction away from the through-hole only by pressing the oil supply nozzle inserted from the oil supply port. The trigger protrusion makes the tip abut against the side surface of the fuel nozzle that has penetrated the through hole, and stably holds the link arm that is biased in the direction approaching the through hole until the fuel nozzle is pulled out. In addition, the spring that urges the link arm in the direction approaching the through hole surely swings the link arm back to the original position in the direction approaching the through hole when the oil supply nozzle is pulled out, and returns the link arm to the link arm. The interlocking sub-shutter can also swing back to the original position, which is the position for closing the through hole, and immediately close the through hole.

It is a disassembled perspective view showing an example of the fuel filler closing device to which the present invention is applied. It is a perspective view showing the sub closure device of this example. It is a disassembled perspective view showing the auxiliary closing device of this example. It is a top view showing the upper stage base of the sub closure device of this example. It is a top view showing the lower stage base of the sub closure device of this example. It is a top view of the lower stage base showing the assembly | attachment relationship of a left shutter and a right shutter. It is a top view showing the upper stage base in the stage before the oil supply nozzle inserted from the oil supply port reaches an upper stage through-hole. It is a top view showing the lower stage base in the stage before the oil supply nozzle inserted from the oil supply port reaches an upper stage through-hole. It is a top view showing the upper stage base in the step in which the inserted oil supply nozzle passes an upper stage through-hole and a lower stage through-hole. It is a top view showing the lower stage base in the step in which the inserted oil supply nozzle passes an upper stage through-hole and a lower stage through-hole. It is a top view showing the upper stage base when the fueling nozzle is inserted in a biased manner to the left in plan view. It is a top view showing the lower stage base when the oil supply nozzle is inserted in a biased manner to the left in plan view. It is a top view showing the upper stage base when the oiling nozzle is inserted in the right direction in plan view. It is a top view showing the lower stage base when the oil supply nozzle is inserted in the right direction in plan view.

  Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings. For convenience of explanation, in the plan view of the upper stage base 22 and the lower stage base 23 (FIG. 4 and others), the front side of the page is referred to as the upper side, the back side of the page is referred to as the lower side, the right side of the drawing is referred to as the right side, and the left side of the drawing is referred to as the left side. As shown in FIG. 1, for example, the secondary closing device 2 of the present invention is attached to the main closing device 3 fitted into the end portion of the fuel supply pipe 4 whose diameter has been expanded and the end portion of the fuel supply pipe 4. It is configured as an integrated module that is sandwiched and incorporated between the fuel filler cover 1 to be installed. As described above, the auxiliary closing device 2 configured as a module is easy to assemble as a fuel filler closing device, and has an advantage that it can be easily designed and deformed by easily selecting the presence or absence of the assembling.

  The oil filler port cover 1 is a resin member in which a bowl-shaped inner surface is formed in a two-stage cylinder, and a circular oil filler port 11 is opened at the bottom of the inner surface. The fuel filler port 11 communicates concentrically with the upper through hole 221 of the sub-closing device 2 so that the left shutter 26 and the right shutter 27 located below the upper through hole 221 can be seen. The sub-closing device 2 is fitted inside the lower cylinder of the fuel filler cover 1 and is fixed in position so as to be sandwiched between the main closing device 3 and the step portion of the fuel filler cover 1. Although illustration is omitted, a nozzle guide following the cylindrical side surface is lowered from the fuel filler cover 1 toward the outer periphery of the upper through-hole 221 of the sub-closing device 2.

  The main closing device 3 is provided with a main through-hole 32 concentrically communicating with the lower through-hole 231 of the sub-closing device 2 in a resin cylinder fitted into the enlarged end of the fuel supply pipe 4. The main through-hole 32 is closed by a resin-made main shutter 31 that is pressed with force. The main shutter 31 is pushed downward by an oil supply nozzle 5 (see FIG. 9 and later) passing through the lower through-hole 231 of the sub-closing device 2, and passes the oil-supply nozzle 5 through the main through-hole 32. When the oil supply nozzle 5 is pulled out, it returns upward by urging and closes the main through-hole 32 again. The main closing device 3 of this example is provided with a nozzle guide 321 following the cylindrical side surface around the main through-hole 32. Further, a pressure regulating valve 33 for adjusting the pressure inside and outside the fuel supply pipe 4 is provided on the plane where the main through-hole 32 is provided.

  As shown in FIGS. 2 to 6, the secondary closing device 2 has a link arm 25 assembled to the upper base 22, a left shutter 26 and a right shutter 27 assembled to the lower base 23, and the upper base 22 and the lower base 23 are connected to each other. The module is assembled in a parallel positional relationship, and the thickness in the insertion direction of the oil supply nozzle 5 is suppressed to the total thickness of the link arm 25, the upper base 22, the left shutter 26 or the right shutter 27, and the lower base 23. In this manner, the link arm 25, the left shutter 26, and the right shutter 27 are separately assembled to the upper base 22 and the lower base 23, thereby facilitating the assembly of the secondary closing device 2, and the upper base 22 and the lower base 23. Thus, stable opening and closing of the left shutter 26 and the right shutter 27 sandwiched between and a complete closing of the lower through-hole 231 by the closed left shutter 26 and right shutter 27 (closing without a gap) are realized.

  The upper base 22 is a resin plate having a circular outer shape in plan view and having a size that can be accommodated at the end of the fuel supply pipe 4 that has been expanded in diameter, and has a circular upper through hole 221 that communicates with the fuel supply port 11 of the fuel supply cover 1. It opens at a position eccentric from the center. As will be described later, the link arm 25 is curved in a semicircular arc shape in plan view following the inner periphery of the upper through hole 221, and is in a range sandwiched between the upper through hole 221 and the outer periphery of the upper base 22. Swing. As described above, the sub-closing device 2 of the present example accommodates the link arm 25 that is pushed and swung by the fuel supply nozzle 5 in the upper base 22 having a size that can be accommodated at the end of the fuel supply pipe 4 that has been expanded in diameter. As a result, downsizing is realized.

  In this example, the upper base 22 is assembled with a link arm 25 that swings in a swing surface parallel to the upper base 22, so that a link swing shaft 222, a link interlocking pin guide groove 223, a coil spring support protrusion 225, a link cover 226 In addition, a link pressing protrusion 227 is provided. Further, in order to assemble to the lower stage base 23, base connecting claws 224 are projected toward the lower stage base 23 at three locations near the outer peripheral edge and at substantially equal intervals in the circumferential direction.

  The link swing shaft 222 is a pin that fits a link swing shaft hole 253 provided at one end of the link arm 25 and constitutes the swing center of the link arm 25, and is sandwiched between the outer peripheral edge and the upper through hole 221. It is provided on the narrow side (lower side in FIG. 4). The upper base 22 of this example has a reverse L-shaped link pressing projection in the side view in the vicinity of the link swing shaft 222 so that the link arm 25 having the link swing shaft hole 253 fitted in the link swing shaft 222 is not removed. 227 is provided, and the link pressing protrusion 227 is engaged with one end of the link arm 25 from above.

  The link interlocking pin guide groove 223 passes through the link interlocking pin 266 of the left shutter 26 to be engaged with the link interlocking cam groove 251 provided at the other end of the link arm 25, and moves according to the displacement of the link interlocking cam groove 251. This is a guide for smoothly moving the link interlocking pin 266. The link interlocking pin guide groove 223 of this example is a meandering groove extending obliquely with respect to the radial direction of the upper base 22, and communicates with a die cut hole of the link cover 226 into which the other end of the link arm 25 is inserted. Yes. The shape of the link interlocking pin guide groove 223 is determined by the swinging posture of the link arm 25 and the shape of the link interlocking cam groove 251.

  The link cover 226 is inserted into the other end of the link arm 25 so that the other end of the oscillating link arm 25 is not separated from the upper base 22, and is always a plane that is always engaged from above, like the link pressing protrusion 227 described above. The side surface on the side where the other end of the link arm 25 is inserted is opened. Thus, the link arm 25 has one end provided with the link swing shaft hole 253 pressed by the link pressing projection 227, and the other end provided with the link interlocking cam groove 251 pressed by the link cover 226. And can be swung in parallel with the upper base 22 along the plane.

  The coil spring support protrusion 225 biases the link arm 25 that swings on the right side (for example, the right side in FIG. 4) of the upper stage through hole 221 in a direction approaching the upper stage through hole 221 (for example, the left side in FIG. 4). , A left side of the upper through hole 221 (for example, the left side in FIG. 4), a position along the outer peripheral edge. Provided. The secondary closing device 2 of the present example uses a coil spring 255 that exerts a restoring force in the direction of contraction due to extension, but if the urging force in the direction approaching the upper through hole 221 can be applied to the link arm 25, A leaf spring may be used.

  The base coupling claw 224 is a claw claw in which a flange (triangular cross section) protrudes inward in the radial direction of the upper base 22 on the cylindrical side surface following the outer peripheral edge of the upper base 22, and is a cross-section provided on the lower base 23. The upper base 22 and the lower base 23 are connected by fitting the cylindrical side surface into a C-type base connection claw receiver 235 and hooking a hook on an engagement step provided on the base connection claw receiver 235. The base connection claw 224 of the present example is provided with mold punching holes for forming the flange, and the mold release holes are used for alignment with the base connection claw receiver 235 of the lower base 23.

  The link arm 25 is a semi-arc-shaped resin plate extending along the upper through-hole 221 and has a link swing shaft hole 253 at one end (lower end in FIG. 4) and the other end (upper in FIG. 4). The link interlocking cam groove 251 which is a long groove bent at an obtuse angle is provided. The other end of the link arm 25 is provided with a coil spring connection hole 254 at the corner of the enlarged rectangular plate, and the other end of the coil spring 255 having one end engaged with the coil spring support protrusion 225 of the upper base 22 is connected to the coil spring connection hole 254. Is engaged. The link arm 25 of this example is located on the right side (the right side in FIG. 4) of the upper stage through hole 221, and the link interlocking cam groove with the link rocking shaft 222 located below the upper stage through hole 221 as the rocking center. The other end provided with 251 is swung to the right (right in FIG. 4).

  The link arm 25 of this example is integrally provided with a trigger protrusion 252 that protrudes inward in the radial direction of the upper through-hole 221 near the middle of the curved portion, and the swing displacement amount of the trigger protrusion 252 (the swinging trigger protrusion) The length of the trajectory at the tip of 252 is amplified approximately twice, and the other end of the link arm 25 provided with the link interlocking cam groove 251 is swung. Thereby, even if the swing displacement amount of the trigger projection 252 pushed by the fuel supply nozzle 5 is small, it is assumed that the swing displacement amount at the other end of the link arm 25 is large enough to be recognized, and the other end of the link arm 25 is followed. The swing displacement amount of the link interlocking cam groove 251 can be increased.

  The trigger protrusion 252 in this example is a plate piece having a trapezoidal shape in side view, and the front side of the upper edge protruding toward the upper through hole 221 is an inclined edge having a downward slope in the protruding direction. The secondary closing device 2 of this example enlarges the trigger protrusion 252 so that the left shutter 26 and the right shutter 27 are always opened when the fueling nozzle 5 is inserted (see FIGS. 11 to 14 to be described later). The length is secured. The trigger protrusion 252 of the present example is configured such that the trigger protrusion 252 forms a concave surface on the upper surface of the upper base 22 within the movement range due to the restriction of the filler cover 1, and the trigger protrusion 252 protrudes below the link arm 25. The necessary size is secured.

  The lower base 23 is a resin plate having the same outer shape as that of the upper base 22, that is, a resin plate having a circular outer shape in plan view and having a size that can be accommodated in the end portion of the enlarged fuel supply pipe 4. A circular lower through hole 231 communicating with the port 32 is opened at a position eccentric from the center. The lower through-hole 231 in this example is provided with an annular wall 232 that surrounds the entire circumference along the inner periphery, and the annular wall 232 is formed by the left outer peripheral wall 262 and the right outer peripheral wall 272 of the left shutter 26 and the right shutter 27 that are closed. To prevent trash from entering. The lower base 23 in this example is provided with a left swing shaft 233 and a right swing shaft 234 for the left shutter 26 and the right shutter 27 that are pivotably mounted in a swing plane parallel to the lower base 23. Yes. Further, in order to be assembled to the upper base 22, base connection claw receivers 235 are provided at three locations near the outer peripheral edge and at substantially equal intervals in the circumferential direction.

  The left swing shaft 233 is on the right side (right side in FIGS. 5 and 6) of the lower base 23, and the right swing shaft 234 is on the left side of the lower base 23 (see FIGS. 5 and 6). 6 on the left side). The left shutter 26 is fitted to the left swing shaft 233 by fitting a left swing shaft hole 264 provided at the end of the left swing arm 263 extending to the right. Further, the right shutter 27 is fitted to the right swing shaft 234 by fitting a right swing shaft hole 274 provided at the right swing arm 273 end that bypasses the left swing arm 263 and extends leftward. To do. In the lower base 23 of this example, since the left shutter 26 and the right shutter 27 are pressed by the upper base 22, members such as the link cover 226 and the link pressing protrusion 227 for pressing the link arm 25 are not provided.

  Three base connection claw receivers 235 are provided in the same positional relationship as the base connection claw 224 corresponding to the base connection claw 224 of the upper base 22 described above. The base coupling claw receiver 235 of this example has a configuration in which an engagement step for hooking the hook of the base coupling claw 224 from below is provided in a C-shaped concave section that opens outward in the radial direction. The base coupling claw 224 is inserted from above and hooks the hook over the engagement step from below, so that the upper base 22 and the lower base 23 are integrated. Since the base connecting claw 224 is made of resin, the upper base 22 can be detached from the lower base 23 by being elastically deformed to release the hook from the engaging step.

  The secondary closing device 2 of this example opens and closes the lower through-hole 231 by two secondary shutters that are symmetric semi-circular in plan view, that is, the left shutter 26 and the right shutter 27 (see FIG. 6). The left shutter 26 and the right shutter 27 can open and close the lower through-hole 231 while reducing the respective movable ranges. Thus, the sub-closing device 2 of the present example realizes miniaturization by housing the left shutter 26 and the right shutter 27 in the lower base 23 having a size that can be accommodated at the end of the fuel supply pipe 4 whose diameter has been expanded.

  As described above, in order to prevent intrusion of dust from the lower through-hole 231, the lower through-hole 231 of this example is provided with the annular wall 232 extending along the inner peripheral edge, and the left shutter 26 and the right of this example are provided. The shutter 27 is provided with a semicircular arc-shaped left outer peripheral wall 262 and a right outer peripheral wall 272 that extend along the respective outer peripheral edges following the annular wall 232. The left outer peripheral wall 262 and the right outer peripheral wall 272 have a function of increasing the section modulus of the left shutter 26 and the right shutter 27 and suppressing or preventing deformation due to an external force.

  The left shutter 26 is orthogonal to the outer peripheral edge of the left plane 261 in the diametrical direction from the corner of the left plane 261 having a semicircular shape in plan view that protrudes to the left (upper corner in FIG. 5 or 6). The extending left swing arm 263 protrudes to the right, and a left swing shaft hole 264 is provided at the tip corner of the left swing arm 263, and the left swing shaft 233 on the left swing shaft 233 of the lower base 23 The hole 264 is fitted and attached to the shaft. The left outer peripheral wall 262 is lowered from the arc-shaped outer peripheral edge of the left plane 261. The left swing arm 263 has a stacked relationship with a right swing arm 273 described later, and is positioned in the upper layer. The left shutter 26 of this example includes a link interlocking pin 266 that engages with a link interlocking cam groove 251 provided on the link arm 25, and a shutter interlocking cam groove 265 that engages a shutter interlocking pin 275 provided on the right shutter 27. Provided.

  The link interlocking pin 266 protrudes from the rectangular flat surface that protrudes from the corner of the left flat surface 261 that is symmetrical with the left swinging shaft hole 264 so as to penetrate the link interlocking pin guide groove 223. The link interlocking pin 266 of this example is concentric and has the same diameter as a right swing shaft hole 274, which will be described later, and is in a positional relationship where it overlaps vertically when the left shutter 26 and the right shutter 27 are closed. The rectangular flat surface projecting from the corner of the left flat surface 261 also has a function of protecting the right swing shaft 234 by covering the right swing shaft hole 274 of the right swing arm 273 located below the left swing arm 263. . The shutter interlocking cam groove 265 is a straight long hole, and is slightly away from the intermediate position of the straight line connecting the left swinging shaft hole 264 of the left swinging arm 263 and the link interlocking pin 266 in the direction orthogonal to the straight line. The left flat surface 261 is provided so as to be inclined slightly upward toward the outer periphery in the diameter direction.

  The right shutter 27 is provided with a left swing shaft hole 264 of the left swing arm 263 from a corner (upper corner in FIG. 5 or 6) of the right plane 271 having a semicircular shape in plan view convex rightward. A right swinging arm 273 that extends perpendicularly to the outer peripheral edge in the diameter direction of the right plane 271 is protruded to the left so as to bypass the end of the right plane 271 and a right swinging shaft is formed at the tip of the right swinging arm 273. A hole 274 is provided, and the right rocking shaft hole 274 is fitted into the right rocking shaft 234 of the lower base 23 and is pivotally attached. The right outer peripheral wall 272 is lowered from the arc-shaped outer peripheral edge of the right plane 271. The right swing arm 273 is in a stacked relationship with the left swing arm 263 described above, and is positioned in the lower layer. The right shutter 27 of this example is provided with a shutter interlocking pin 275 that is inserted from below into a shutter interlocking cam groove 265 provided in the left shutter 26 and engaged therewith.

  The corner of the right plane 271 forms a similar square plane in line symmetry with the square plane provided at the corner of the left plane 261, and the left of the left swing arm 263 located in the upper layer of the right swing arm 273. The rocking shaft hole 264 is covered to protect the left rocking shaft 233. The shutter interlocking pin 275 bulges a portion extending perpendicularly to the outer peripheral edge in the diameter direction of the right plane 271 and starts from the intermediate position of the straight line connecting the right swinging shaft hole 274 of the right swinging arm 273 and the link interlocking pin 266. It is provided at a position slightly apart in the direction orthogonal to the straight line. Since the right swing arm 273 is positioned below the left swing arm 263, the shutter interlocking pin 275 is inserted from below into the shutter interlocking cam groove 265 provided in the left swinging arm 263 and is engaged therewith. .

  In the sub-closing device 2 of this example, the length from the left swing shaft 233 to the engagement position of the shutter interlocking pin 275 and the shutter interlocking cam groove 265 is equal to the length from the right swing shaft 234 to the engagement position. Thus, the swing displacement amount of the engagement position with respect to the left swing shaft 233 and the swing displacement amount of the engagement position with respect to the right swing shaft 234 are made the same. As a result, the swing of the link arm 25 is transmitted to the left shutter 26 via the link interlocking pin 266 engaged with the link interlocking cam groove 251. When the left shutter 26 swings, the shutter interlocking is displaced according to the left shutter 26. Since the shutter interlocking pin 275 swings as much as the cam groove 265, as a result, the right shutter 27 swings as much as the left shutter 26, and the left shutter 26 and the right shutter 27 can interlock to open and close the lower through hole 231. become.

  The secondary closing device 2 of the present example is formed on the outer side in the radial direction invisible from the upper stage through-hole 221 by increasing the inner diameter of the lower stage through-hole 231 with respect to the upper stage through-hole 221 having a small margin with respect to the oil supply nozzle 5. The formed annular wall 232 is surrounded by the left outer peripheral wall 262 and the right outer peripheral wall 272 of the left shutter 26 and the right shutter 27 that block the lower through-hole 231. Accordingly, dust that tries to enter from the upper through hole 221 opened to the outside is prevented by the left plane 261 and the right plane 271 of the left shutter 26 and the right shutter 27.

  Further, dust that has entered from the gap between the upper base 22 and the left plane 261 and the right plane 271 of the left shutter 26 and the right shutter 27 is left outer wall 262 and right outer wall 272 orthogonal to the left plane 261 and right plane 271. This prevents the left outer peripheral wall 262 and the right outer peripheral wall 272 from entering the inside of the radius. The dust that has entered the radius inside the left outer peripheral wall 262 and the right outer peripheral wall 272 is prevented from entering the lower through hole 231 by the annular wall 232. As described above, the sub-closing device 2 of the present example never allows dust to enter the main closing device 3 as long as the left shutter 26 and the right shutter 27 are closed.

  The operation of the auxiliary closing device 2 of this example will be described. When the oil supply nozzle 5 is inserted from the oil supply port 11, the tip of the oil supply nozzle 5 first comes into contact with the inclined edge of the trigger protrusion 252 as shown in FIGS. By pushing outward in the direction, the link arm 25 starts to swing in a direction away from the upper through hole 221 via the trigger protrusion 252. As a result, the link interlocking cam groove 251 provided at the other end of the link arm 25 is displaced, the link interlocking pin 266 is pushed away from the upper through hole 221, and the left shutter 26 is directed toward the position where the lower through hole 231 is opened. Start rocking.

  At the same time, as described above, in conjunction with the left shutter 26, the right shutter 27 also starts to swing toward the position where the lower through hole 231 is opened. The link arm 25 is urged in the direction approaching the upper stage through hole 221 by the restoring force of the coil spring 255 that starts to extend, and tries to swing the link arm 25 in the direction closer to the upper stage through hole 221, but the trigger protrusion 252 The oil supply nozzle 5 whose tip is brought into contact with the inclined front edge is opposed to the upper end through-hole 221 so as to be prevented from swinging in the direction approaching the upper stage through-hole 221.

  When the refueling nozzle 5 is inserted deeper, the tip of the refueling nozzle 5 passes through the inclined edge of the trigger protrusion 252 as shown in FIGS. Abuts the tip. In the process of reaching this stage, the link arm 25 further swings away from the upper through hole 221 via the trigger protrusion 252 and the link interlocking cam groove 251 provided at the other end of the link arm 25 is displaced. Then, push the link interlocking pin 266 away from the upper through hole 221, swing the left shutter 26 to the position where the lower through hole 231 is opened, and move the right to the position where the lower through hole 231 is opened in conjunction with the left shutter 26. The shutter 27 is also swung.

  The link arm 25 is urged in the direction approaching the upper stage through hole 221 by the restoring force of the extended coil spring 255, and tries to swing the link arm 25 in the direction closer to the upper stage through hole 221. The oil supply nozzle 5 with which the side surfaces abut is opposed to be prevented from swinging in the direction approaching the upper through hole 221. This means that the fueling nozzle 5 serves as a stopper for closing the left shutter 26 and the right shutter 25.

  Thus, the lower through-hole 231 is completely opened (see FIG. 10), and the oil supply port 11, the upper through-hole 221 and the oil supply nozzle 5 passing through the lower through-hole 231 communicate with each other in the vertical direction. Push 31 and you can refuel. When the oil supply nozzle 5 is pulled out, the link arm 25 swings in a direction approaching the upper through-hole 221 according to the restoring force because the oiling nozzle 5 that has been opposed to the restoring force of the coil spring 255 disappears. Thus, the link interlocking cam groove 251 pushes the link interlocking pin 266 closer to the upper stage through hole 221 by swinging the link arm 25, and the left shutter 26 is swung to a position where the lower stage through hole 231 is blocked, and the left shutter The right shutter 27 is swung to a position where the lower through-hole 231 is closed in conjunction with 26, and the lower through-hole 231 is closed.

  In the sub-closing device 2 of the present example, the upper through-hole 221 is made larger than the outer diameter of the fueling nozzle 5 in order to provide a margin for insertion of the fueling nozzle 5. For this reason, it is conceivable that the oil supply nozzle 5 is displaced from the axis of the upper through hole 221. However, as shown in FIGS. 11 to 14, by making the trigger protrusion 252 sufficiently large, the link is made so that both the left shutter 26 and the right shutter 27 swing to the position where the lower through hole 231 is opened. The swing displacement amount of the arm 25 can be earned. Thus, the auxiliary closing device 2 of the present invention opens a path that communicates with the main closing device 3 only when the fueling nozzle 5 is inserted from the fueling port 11, and immediately closes the path when the fueling nozzle 5 is pulled out. it can.

1 Refueling port cover
11 Refueling port 2 Secondary closing device
22 Upper base
221 Upper through hole
23 Lower base
231 Lower through hole
25 Link arm
252 Trigger protrusion
255 coil spring
26 Left shutter
265 Shutter-linked cam groove
266 Link interlocking pin
27 Right shutter
275 Shutter interlocking pin 3 Main closing device 4 Fuel supply pipe 5 Fuel supply nozzle

Claims (4)

An oil supply port that is above the main closing device of the oil supply port closing device that is pushed open by the oil supply nozzle that is inserted from the oil supply port and that is opened and closed by being pushed by the oil supply nozzle so that dust does not reach the main closing device. A secondary closing device of the closing device,
A flat plate that intersects the insertion direction of the oil nozzle, and a base provided with a through hole for the oil nozzle;
A link arm that oscillates around a link oscillating shaft fixed to the base and avoids a through hole, and is biased in a direction approaching the through hole,
A sub shutter that swings from a position that closes the through hole to a position that opens the through hole around the sub shutter rocking shaft fixed to the base.
The link arm protrudes the trigger projection pushed in the direction away from the through hole by the oiling nozzle to be inserted into the range of the through hole,
The link arm and the sub shutter are connected by engaging a link interlocking cam groove provided on one side and a link interlocking pin provided on the other side. The auxiliary closing device for a fuel filler closing device according to claim 1, wherein the link arm is provided with an inclined edge or inclined surface that is inclined downward in the protruding direction on the upper surface of the trigger protrusion. The auxiliary closing device of the fuel filler closing device according to claim 1 or 2, wherein the link arm is urged in a direction approaching the through hole by a spring supported by the base. The sub-shutter is composed of a left shutter and a right shutter that are double-spread,
The left shutter is linked to a shutter that connects the left shutter and the right shutter to one of the link interlocking cam groove and linkter interlocking pin that connects the link arm and the left shutter at a position away from the left swing shaft fixed to the base. Provide one of the cam groove and shutter interlocking pin,
The right shutter is provided with the other of the shutter interlocking cam groove and the shutter interlocking pin for connecting the left shutter and the right shutter at a position away from the right swing shaft fixed to the base. A secondary closing device for the filler closing device.

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