JP2009286251A - Holding structure of inlet filler pipe - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide holding structure of an inlet filler pipe having excellent sealing properties of an elastic seal member with respect to a vehicle body side panel. <P>SOLUTION: The elastic seal member 1 holding the inlet filler pipe 5 to a side member outer 4 and a wheelhouse outer 3 of the vehicle body has a tubular part 15; a wall thick part 14b extending radially outward at one end in the axial direction of the tubular part; an engagement groove 14a formed of an outer peripheral surface 15d of the tubular part 15 and a peripheral surface 14d extending radially outward of the wall thick part 14b and held in a through-hole 40 of the side member outer; and a lip 18 extending radially inward from an inner peripheral surface 14c of the wall thick part 14b and resiliently contacting with an outer peripheral surface 51 of the inlet filler pipe. The lip 18 has a connecting part 18a adjacent to the inner peripheral surface 14c of the wall thick part 14b; and a recessed part 18b formed of an inner peripheral surface 18p opposed to the other end in the axial direction in the connecting part 18a and the inner peripheral surface 14c of the wall thick part 14b. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a structure for holding an inlet filler pipe on a vehicle body outer plate via an elastic seal member.

  As shown in FIG. 7, a front end portion of an inlet filler pipe 95 extending from the fuel tank is disposed in the fuel filler port 90 for supplying fuel to the vehicle. The distal end portion of the inlet filler pipe 95 is held in a through hole 96 formed in the vehicle body side panel 94 via an elastic seal member 91. As shown in FIGS. 7 and 8, the elastic seal member 91 includes a cylindrical portion 92, a thick portion 93 extending radially outward at one axial end portion of the cylindrical portion 92, and an outer periphery of the cylindrical portion 92. An engaging portion 97 formed by the surface 92d and a peripheral surface 93d extending radially outward of the thick portion 93 and held on the periphery of the through hole 96, and radially inward from the inner peripheral surface 93c of the thick portion 93. It has a lip portion 98 that extends and elastically contacts the outer peripheral surface of the inlet filler pipe 95 (see Patent Documents 1 to 3).

  Here, as shown in FIG. 8, the conventional elastic seal member 91 has a lip portion 98 extending radially inward from the inner peripheral surface 93 c of the thick portion 93. The connecting portion 98a of the lip portion 98 approximates the engaging portion 97 in the axial direction. For this reason, by inserting or returning the inlet filler pipe 95, the lip portion 98 uses the portion where the central portion of the axial thickness of the connecting portion 98a intersects the inner peripheral surface 93c of the thick portion 93 as the swing fulcrum P1. Oscillates inside or outside the vehicle body. When the thick portion 93 swings, the portion where the peripheral surface 93 d extending radially outward of the thick portion 93 and the outer peripheral surface 92 d of the cylindrical portion 92 intersect, that is, the radially inner side of the engaging portion 97. The inner part is defined as a swing fulcrum P2. For this reason, the swing fulcrum P1 of the lip portion 98 is formed at a position approximate to the swing fulcrum P2 of the thick portion 93.

  In assembling the inlet filler pipe 95 to the vehicle body, the elastic seal member 91 is inserted into the through hole 96 formed in the vehicle body side panel 94 and the periphery of the through hole 96 is held by the engaging portion 97. Next, as shown in FIG. 7, the inlet filler pipe 95 is inserted into the cylindrical portion 92 of the elastic seal member 91 from the inside of the vehicle body to the outside. At this time, the lip portion 98 swings outward from the vehicle body about the swing support point P1. Along with this, the thick portion 93 provided adjacent to the outside in the radial direction of the lip portion 98 tends to swing in the direction of pressing the vehicle body side panel 94 from the outside of the vehicle body around the swing support point P2. For this reason, when the inlet filler pipe 95 is inserted, the elastic seal member 91 is reliably engaged with the vehicle body side panel 94.

However, as shown in FIG. 9, the axial position of the inlet filler pipe 95 may be corrected after the inlet filler pipe 95 is assembled to the vehicle body. When the inlet filler pipe 95 is returned to the direction opposite to the assembling direction, that is, the inner side of the vehicle body, the lip portion 98 swings inward of the vehicle body with the swinging fulcrum P1 as the center. In conjunction with the swinging of the lip portion 98, the thick portion 93 is lifted from the vehicle body side panel 94 around the swinging fulcrum P2. In this state, if the inlet filler pipe 95 is fixed to the vehicle body side panel 94 by fixing means (not shown), there is a possibility that seal leakage may occur between the vehicle body side panel 94 and the elastic seal member 91.
JP-A-8-40092 Japanese Utility Model Publication No. 58-56616 JP 2005-335565 A

  This invention is made | formed in view of this situation, and makes it a subject to provide the holding structure of the inlet filler pipe excellent in the sealing performance of the elastic seal member with respect to a vehicle body side panel.

  In order to solve the above-described problem, the invention according to claim 1 is directed to an inlet filler pipe, a vehicle body side panel having a through-hole, a cylindrical portion, and a radially outer end at one end portion in the axial direction of the cylindrical portion. An engagement portion formed by a thick portion, an outer peripheral surface of the cylindrical portion and a peripheral surface extending radially outward of the thick portion, and held on a peripheral edge of the through hole; and an inner portion of the thick portion An elastic seal member having a lip portion extending radially inward from the peripheral surface and elastically contacting the outer peripheral surface of the inlet filler pipe, the lip portion being formed radially inwardly to the inlet filler pipe A tip portion that is elastically contacted, a connecting portion adjacent to the inner peripheral surface of the thick portion, an inner peripheral surface that faces the other end portion in the axial direction of the connecting portion, and an inner peripheral surface of the thick portion. Formed in the axial direction from the other end in the axial direction. A recess recessed toward the part, characterized in that with.

  The invention according to claim 2 is characterized in that a central portion of the connecting portion of the lip portion in the thickness direction has a different axial position with respect to the peripheral surface of the thick portion.

  According to a third aspect of the present invention, in the radial direction of the lip portion, the lip portion is radially inward of the lip portion on the outer peripheral surface facing away from the inner peripheral surface on which the dent portion is formed. It has the 1st displacement part from which the angle with respect to changes.

  According to a fourth aspect of the present invention, there is provided an outer peripheral surface that faces away from the inner peripheral surface of the lip portion where the recess portion is formed, and the lip portion is provided at a portion having the same radial position as the recess portion. It has the 2nd displacement part from which the angle with respect to the radial direction of a part changes, It is characterized by the above-mentioned.

  According to the first aspect of the present invention, the lip portion has a recess formed by the inner peripheral surface of the connecting portion and the inner peripheral surface of the thick portion. For this reason, the oscillating fulcrum of the lip part moves away from the oscillating fulcrum of the thick part as compared with the case where there is no hollow part. Therefore, when the lip portion of the elastic seal member swings by correcting the position of the inlet filler pipe in the cylindrical portion of the elastic seal member, the swinging force of the lip portion is directly applied to the swinging fulcrum of the thick portion. Without being transmitted, it is attenuated until it reaches the pivot point of the thick part.

  Moreover, the length of the surface film of a lip | rip part becomes long by forming a hollow part in a lip | rip part. Therefore, when the position of the inlet filler pipe is corrected to the cylindrical portion of the elastic seal member, the positional displacement of the surface film due to the swinging of the lip portion is absorbed by the surface film of the recessed portion. For this reason, the positional displacement of the surface film due to the swing of the lip portion is not easily transmitted to the thick portion. For this reason, the surface film of the thick part is not easily displaced and the swinging of the thick part is suppressed.

  Therefore, when correcting the position of the inlet filler pipe in the cylindrical portion of the elastic seal member, the thick portion of the elastic seal member can be prevented from floating from the vehicle body side panel, and the seal between the elastic seal member and the vehicle body side panel can be suppressed. Can be secured.

  According to the second aspect of the present invention, the axial position of the central portion of the connecting portion of the lip portion in the thickness direction differs from the peripheral surface of the thick portion. A portion where the central portion of the connecting portion of the lip portion in the thickness direction intersects with the inner peripheral surface of the thick portion is a swing fulcrum P1 of the lip portion. The intersection of the peripheral surface of the thick portion and the outer peripheral surface of the cylindrical portion is a swing fulcrum P2 of the thick portion. For this reason, the rocking fulcrum P1 of the lip portion is arranged at a position different from the rocking fulcrum P2 of the thick portion. Therefore, by correcting the position of the inlet filler pipe to the cylindrical portion, it is possible to effectively suppress the swing of the thick portion when the lip portion swings.

  According to the third aspect of the present invention, the lip portion bends around the first displacement portion when the lip portion swings. Therefore, the swing of the lip portion is absorbed by the first displacement portion, and the swing of the thick portion can be effectively suppressed.

  According to the fourth aspect of the present invention, the swing of the lip portion is absorbed by the second displacement portion of the connecting portion. Therefore, the swinging of the thick part can be effectively suppressed.

  One end portion of the inlet filler pipe is disposed at a fuel filler opening that opens in the vehicle body side panel, and the other end portion is connected to the fuel tank. The outer peripheral surface of one end portion of the inlet filler pipe is held by the vehicle body side panel via an elastic seal member. The inlet filler pipe is fixed to the vehicle body side panel by, for example, a bolt fixing means.

  The vehicle body side panel is, for example, a wheel house outer and a side member outer of the vehicle body. The wheel house outer is spaced apart from the side member outer and disposed inside the side member outer. An outer through hole is formed in the side member outer, an inner through hole is formed in the wheel house outer, and an elastic seal member is held on the periphery of the outer through hole and the periphery of the inner through hole. Each of the wheel house outer and the side member outer constitutes a part of a vehicle body outer plate, and can have a structure similar to a conventional structure made of sheet metal. The wheel house outer has an inner through-hole through which the tip of the inlet filler pipe can be inserted, and the side member outer has a recess having an outer through-hole opened at the outer surface. This recessed part forms the space which comprises a fuel filler opening between the lid assembled | attached to the side member outer so that rotation was possible.

  The elastic seal member is made of a soft resin such as rubber or thermoplastic elastomer. The elastic seal member includes a cylindrical part, a thick part formed at one end of the cylindrical part in the axial direction, an engaging part that is engaged and held on the vehicle body side panel, and an inner peripheral surface of the thick part. And a lip portion extending inward in the radial direction.

  A communication hole for communicating between one end portion in the axial direction of the elastic seal member and the other end portion is opened inside the cylindrical portion. An inlet filler pipe is inserted into the communication hole.

  The thick part is expanded in a flange shape radially outward from the cylindrical part and is thicker than the cylindrical part and the lip part.

  The engaging portion is formed by an outer peripheral surface of the cylindrical portion and a peripheral surface connected to the outer peripheral surface and extending radially outward of the thick portion. For example, the cylindrical portion has a portion protruding outward in the radial direction so as to face the peripheral surface of the thick portion. A groove-like engaging portion is formed by the projecting portion and the peripheral surface of the thick portion. The elastic seal member is engaged and held on the vehicle body side panel by sandwiching the periphery of the through hole of the vehicle body side panel by the overhanging portion and the peripheral surface of the thick portion. When the vehicle body side panel is a side member outer and a wheel house outer, the engaging portion engages with a peripheral edge of the outer through hole formed in the side member outer and a peripheral edge of the inner through hole formed in the wheel house outer. Has been. In this case, the lip portion extends from the thick portion held in one of the outer through hole and the inner through hole.

  The lip portion extends radially inward from the inner peripheral surface of the thick portion, and holds the inlet filler pipe at the distal end portion on the radially inner side. The lip portion is connected to the inner peripheral surface of the thick portion at the connecting portion. It is preferable that the axial positions of the central portions in the thickness direction of the connecting portions of the lip portions are shifted from each other with respect to the peripheral surface of the thick portion. A portion where the central portion of the connecting portion in the thickness direction intersects with the inner peripheral surface of the thick portion is a swing fulcrum P1 of the lip portion. A portion where the peripheral surface of the thick portion intersects the outer peripheral surface of the cylindrical portion is a swing fulcrum P2 of the thick portion. For this reason, the swinging fulcrum P1 of the lip portion is formed at a position away from the swinging fulcrum P2 of the thick portion by shifting to the one end side in the axial direction as compared with the case where there is no recess. . Therefore, when the lip portion swings, the thick portion can be effectively prevented from swinging.

  A first displacement portion whose angle with respect to the radial direction of the lip portion changes is formed on the inner peripheral surface that is radially inward from the hollow portion of the lip portion and on the outer peripheral surface that faces away from the inner peripheral surface that forms the hollow portion. It is good to be. The first displacement portion, for example, changes its direction after inclining toward the other end side in the axial direction with respect to the inner side in the radial direction, and inclines toward the one end side in the axial direction, or radially inward. Or extending toward The one end portion side in the axial direction is a side of one end portion in the axial direction of the elastic seal member and is a side on which the thick portion is disposed. The other end portion side in the axial direction is the other end portion side in the axial direction of the elastic seal member and is the opposite side to the side on which the thick portion is disposed.

  It is preferable that a second displacement portion in which an angle with respect to the radial direction of the lip portion is changed is formed in a portion having the same position in the radial direction as the hollow portion on the outer peripheral surface of the connecting portion. For example, the second displacement portion is inclined toward the other end portion in the axial direction with respect to the radially inner side, and then changed in direction and extends toward the radially inner side. Alternatively, the second displacement portion, for example, changes direction after extending toward the other end side in the axial direction, and extends toward the radially inner side.

Embodiments of the present invention will be described below with reference to the drawings.
(Example 1)
FIG. 1 is a cross-sectional view of the holding structure for the inlet filler pipe of this example. In FIG. 1, the upward direction is referred to as the outside of the vehicle body, and the downward direction is referred to as the inside of the vehicle body. The same applies to FIGS. As shown in FIG. 1, the inlet filler pipe holding structure of this example includes an inlet filler pipe 5, an elastic seal member 1, a side member outer 4 as a vehicle body side panel, and a wheel house outer 3.

  The inlet filler pipe 5 has a fuel cap 50 screwed to the tip, and is fixed to the vehicle body metal plate at an intermediate portion (not shown). A front end portion 52 of the inlet filler pipe 5 is held by the side member outer 4 and the wheel house outer 3 of the vehicle body via the elastic seal member 1.

  The side member outer 4 and the wheel house outer 3 are metal members that constitute the outer plate of the vehicle body, and the side member outer 4 is disposed outside the wheel house outer 3 at a predetermined interval. A recess 42 is formed in the side member outer 4, and an outer through hole 40 made of a circular hole is formed through the bottom of the recess 42. The wheel house outer 3 is formed with an inner through hole 30 formed of a circular hole, and the inner through hole 30 communicates with the outer through hole 40 substantially coaxially. The side member outer 4 and the wheel house outer 3 are welded to each other at a portion not shown. The recess 42 forms a space that constitutes the fuel filler opening 8 with the lid 49 that is rotatably assembled to the side member outer 4.

  The elastic seal member 1 is a substantially cylindrical member that is assembled in the vicinity of the fuel filler port 8 of the vehicle body and has a communication hole 10. The elastic seal member 1 holds the outer holding portion 14 that holds the peripheral edge 41 of the outer through hole 40 formed in the side member outer 4 and the peripheral edge 31 of the inner through hole 30 formed in the wheel house outer 3. An inner holding portion 13 and a cylindrical portion 15 that connects the outer holding portion 14 and the inner holding portion 13 and is bent in a bellows shape toward the outer side and the inner side in the radial direction are provided.

  The elastic seal member 1 is an elastic member made of rubber, and is elastically contacted with the peripheral edge 41 of the outer through hole 40 of the side member outer 4 and the peripheral edge 31 of the inner through hole 30 of the wheel house outer 3. The space 34 between the Haus outer 3 is sealed. An inlet filler pipe 5 is inserted into the communication hole 10 of the elastic seal member 1.

  As shown in FIGS. 1 and 2, the outer holding portion 14 is formed on one end of the elastic seal member 1 in the axial direction, that is, on the outer peripheral surface on the outer side of the vehicle body. The outer holding portion 14 has an engaging groove 14 a that engages with the peripheral edge 41 of the outer through hole 40, and a thick portion 14 b that is adjacent to the engaging groove 14 a and elastically contacts the side member outer 4. The thick part 14b is a thick part that spreads out from the tubular part 15 in a flange shape radially outward. The inner peripheral surface 14c of the thick portion 14b is formed with a lip portion 18 that extends radially inward and holds the outer peripheral surface 51 of the inlet filler pipe 5. As shown in FIGS. 2 and 3, the lip portion 18 is formed on the connecting portion 18 a adjacent to the thick portion 14 b and the inner peripheral surface 18 p on the side where the cylindrical portion 15 is disposed in the connecting portion 18 a. It has the hollow part 18b made and the front-end | tip part 18c holding the outer peripheral surface 51 of the inlet filler pipe 5. As shown in FIG.

  The lip portion 18 is connected to the thick portion 14b at the connecting portion 18a. As shown in FIG. 3, the center portion C1 in the thickness direction of the connecting portion 18a of the lip portion 18 is offset from the circumferential surface 14d of the thick portion 14b in the axial direction. The lip portion 18 has a swing fulcrum P1 at a point where the central portion C1 in the thickness direction of the connecting portion 18a and the inner peripheral surface 14c of the thick portion 14b intersect, Swings outward. When the thick portion 14b swings in the inner direction and the outer direction of the vehicle body, the portion on the radially inner side of the peripheral surface 14d forming the engagement groove 14a, that is, the inner portion of the engagement groove 14a is set as the swing fulcrum P2. And A recess 18b is formed on the side of the lip 18 facing the vehicle body. For this reason, the rocking fulcrum P1 of the lip portion 18 is shifted to the outside of the vehicle body by the depth of the hollow portion 18b. Therefore, by forming the recessed portion 18b, the position where the swing fulcrum P1 of the lip portion 18 is further away from the swinging fulcrum P2 of the thick portion 14b than in the case where the recessed portion 18b is not formed. Will be formed.

  The hollow portion 18b is formed by an inner peripheral surface 18p facing the other end portion in the axial direction and an inner peripheral surface 14c of the thick portion 14b in the connecting portion 18a, and extends in the axial direction from the other end portion in the axial direction. It is depressed toward one end. Here, the one end portion in the axial direction is the end portion on the side where the thick portion 14b in the axial direction of the elastic seal member 1 is disposed. In this example, the one end portion of the outer holding portion 14 disposed on the outer side of the vehicle body. It is an end. The other end portion in the axial direction is an end portion on the opposite side to the side where the axially thick portion 14b of the elastic seal member 1 is disposed. In this example, the inner holding portion 13 disposed on the inner side of the vehicle body. It is. Therefore, in this example, the recess 18b is formed by the inner peripheral surface 18p facing the inner side of the vehicle body and the inner peripheral surface 14c of the thick portion 14b in the connecting portion 18a. It is depressed toward the bottom 18i. The position in the axial direction of the opening end 18h of the recess 18b is closer to the thick portion 14b than the peripheral surface 14d of the thick portion 14b constituting the engagement groove 14a.

  The inner peripheral surface 18p formed with the recess 18b and the outer peripheral surface 18e facing away from the recess 18b of the lip 18 has a concave second shape whose angle with respect to the radial direction of the lip 18 changes. One displacement portion 18f is formed. The first displacement portion 18f is inclined toward the inside of the vehicle body with respect to the inner side in the radial direction, then changed in a V shape, and is inclined toward the outside of the vehicle body. The first displacement portion 18f is formed between a surface 18j inclined on the inner side in the radial direction on the outer peripheral surface 18e of the lip portion 18 and a surface 18k inclined on the outer side of the vehicle body. .

  In addition, a concave second displacement portion 18g in which an angle with respect to the radial direction of the lip portion 18 is changed is formed in a portion of the outer peripheral surface 18e of the connecting portion 18a that has the same radial position as the hollow portion 18b. The second displacement portion 18g includes an end-side surface 14e inclined toward the inner side of the vehicle body with respect to the radially inner side on the outer peripheral surface 14g of the thick portion 14b, and radially inward from the end-side surface 14e. It is formed between the extending surface 18n of the connecting portion 18a.

  The shape of the lip portion 18 is determined by the hollow portion 18b, the concave first displacement portion 18f, and the concave second displacement portion 18g. That is, the lip portion 18 has a connecting portion 18a formed between the recess portion 18b and the second displacement portion 18g. In the connecting portion 18a, the lip portion 18a extends radially inward from the thick portion 14b in an annular shape. The lip portion 18 is inclined toward the inner side of the vehicle body at a position radially inward of the recess portion 18b, and changes its direction at the first displacement portion 18f. The lip portion 18 extends to the distal end portion 18c while being inclined toward the outer side of the vehicle body with respect to the radially inner side.

  The thick portion 14b of the outer holding portion 14 is provided adjacent to the outer side of the vehicle body of the engagement groove 14a. The outer peripheral surface 14g facing the vehicle body outside of the thick portion 14b extends along the radial direction in parallel with the peripheral surface 14d facing the vehicle body inner side. The thickness D in the axial direction of the thick portion 14 b is uniform in the radial direction, and the thickness D is larger than the thickness of the lip portion 18 and larger than the thickness of the cylindrical portion 15. A seal lip portion 14f that elastically contacts the side member outer 4 projects from the outer peripheral end portion of the thick portion 14b. On the opposite side of the thick portion 14b across the engagement groove 14a, the tubular portion 15 projects radially outward to form a first projecting portion 15a. An engagement groove 14a is formed by the outer peripheral surface 15d of the first overhanging portion 15a and the peripheral surface 14d spreading outward in the radial direction of the thick portion 14b. The outer peripheral surface 15d of the first projecting portion 15a and the peripheral surface 14d of the thick portion 14b are elastically held at the bottom of the concave portion 42 of the side member outer 4. A bent portion 15b that is bent from the radially outer side to the radially inner side with respect to the inner side of the vehicle body is provided on the inner side of the first overhanging portion 15a of the cylindrical portion 15.

  As shown in FIG. 4, the inner holding portion 13 is formed on the outer peripheral surface of the other end portion in the axial direction of the elastic seal member 1, that is, the inner end portion of the vehicle body. The inner holding part 13 has an engaging groove 13a that engages with the peripheral edge 31 of the inner through hole 30, and a thick part 13b that is provided adjacent to the engaging groove 13a and elastically contacts the wheel house outer 3. The thick part 13b is thicker than the cylindrical part 15, and is a part that spreads out in a flange shape from the cylindrical part 15 toward the radially outer side. The engaging groove 13a is formed by a circumferential surface 13d that extends radially outward of the thick portion 13b and an outer circumferential surface 15d of the second projecting portion 15c of the tubular portion 15 that projects outward in the vehicle body direction. The peripheral surface 13d of the thick portion 13b and the outer peripheral surface 15d of the second projecting portion 15c are elastically held by the wheel house outer 3. A seal lip portion 13f that is elastically in contact with the wheel house outer 3 protrudes from an outer peripheral end portion of the peripheral surface 13d of the thick portion 13b.

  In assembling the inlet filler pipe 5 to the vehicle body, first, as shown in FIG. 4, the inner through hole 30 of the wheel house outer 3 of the vehicle body and the outer through hole 40 of the side member outer 4 are directed from the outside of the vehicle body to the inside of the vehicle body. Then, the elastic seal member 1 is inserted. The inner holding portion 13 is reduced in diameter radially inward and is inserted into the inner through hole 30 of the wheel house outer 3 from the outside of the vehicle body toward the inside of the vehicle body. Thereafter, the outer holding portion 14 is reduced in diameter radially inward and pulled out from the outer through hole 40 of the side member outer 4 to the outside of the vehicle body. At this time, the inner holding portion 13 and the outer holding portion 14 are positioned with their peripheral surfaces 13d and 14d in contact with the peripheral edge 31 of the inner through hole 30 and the peripheral edge 41 of the outer through hole 40, respectively, and with elastic restoring force. The diameter is increased, and the engagement grooves 13a and 14a are engaged and held at the peripheral edges 31 and 41, respectively. Thereby, the elastic seal member 1 is fixed to the vehicle body.

  Next, the inlet filler pipe 5 is inserted into the communication hole 10 of the elastic seal member 1 from the inside of the vehicle body toward the outside of the vehicle body. With the tip of the inlet filler pipe 5 disposed slightly outside the vehicle body with respect to the outer holding portion 14 of the elastic seal member 1, the intermediate portion of the inlet filler pipe 5 is formed on the vehicle body sheet metal by a fixing means such as a bolt (not shown). Lock and fix. At this time, the outer peripheral surface 51 of the inlet filler pipe 5 is held by the lip portion 18 of the elastic seal member 1. When the inlet filler pipe 5 is inserted into the communication hole 10 toward the outside of the vehicle body, the lip portion 18 follows the outer peripheral surface 51 of the inlet filler pipe 5 and swings outside the vehicle body. As shown by the arrows in FIG. 4, when the inlet filler pipe 5 is returned from the outside of the vehicle body to the inside of the vehicle body by correcting the position of the inlet filler pipe 5, the lip portion 18 follows the outer peripheral surface 51 of the inlet filler pipe 5. Swing inward.

  Here, in the elastic seal member 1 of the present example, the recess 18b is formed in the connecting portion 18a connected to the thick portion 14b in the lip portion 18. For this reason, compared with the case where a hollow part is not formed (FIG. 7), the rocking | fluctuation fulcrum P1 of the lip | rip part 18 moves away from the rocking | fluctuation fulcrum P2 of the thick part 14b. Therefore, when the inlet filler pipe 5 is returned to the communication hole 10 of the elastic seal member 1 from the outside of the vehicle body toward the inside of the vehicle body, the lip portion is swung to the rocking fulcrum P2 of the thick portion 14b. The swinging force 18 is not transmitted directly, but is attenuated before reaching the swinging fulcrum P2 of the thick portion 14b.

  Further, by forming the recessed portion 18b in the lip portion 18, the surface film length of the lip portion 18 becomes longer. For this reason, the positional displacement of the surface film due to the swing of the lip portion 18 is absorbed by the surface film of the recessed portion 18b and is not easily transmitted to the thick portion 14b. Therefore, the surface film of the thick portion 14b is not easily displaced and the swing of the thick portion 14b is suppressed.

  Therefore, when the inlet filler pipe 5 is returned to the cylindrical portion 15 of the elastic seal member 1 from the outside of the vehicle body to the inside of the vehicle body, the thick portion 14b of the elastic seal member 1 can be prevented from being lifted from the side member outer 4, and the elastic seal The sealing performance between the member 1 and the side member outer 4 can be ensured.

  Further, when the lip portion 18 swings, the lip portion 18 bends around the first displacement portion 18f and the second displacement portion 18g. Therefore, the oscillation of the lip portion 18 is absorbed by the first displacement portion 18f and the second displacement portion 18g, and the oscillation of the thick portion 14b can be effectively suppressed.

(Example 2)
In this example, as shown in FIG. 5, the second displacement part is not formed in the lip part 18 of the elastic seal member 1, which is different from the first example. On the outer peripheral surface 18e of the lip portion 18, a first displacement portion 18f is formed on the radially inner side of the recess portion 18b. The first displacement portion 18f changes in angle with respect to the lip portion 18 in the radial direction. The outer peripheral surface 18e of the lip portion 18 is gradually inclined from the thick portion 14b toward the inside of the vehicle body, changes direction at the first displacement portion 18f, and extends to the front end portion 18c toward the outside of the vehicle body.

  The position in the axial direction of the opening end 18h of the recess 18b in this example is slightly outside the vehicle body than the engagement groove 14a. The outer peripheral surface 14g of the thick portion 14b facing the outer side of the vehicle body is gradually inclined toward the inner side of the vehicle body with respect to the radially inner side, and continues to the surface 18j forming the first displacement portion 18f. Yes. For this reason, the maximum thickness part of the axial direction of the thick part 14b is located in the radial direction outer side.

  The swing fulcrum P1 of the lip portion 18 is a portion where the central portion of the axial thickness of the connecting portion 18a intersects the inner peripheral surface 14c of the thick portion 14b, and the swing fulcrum P2 of the thick portion 14b is This is a portion where the peripheral surface 14d of the thick portion 14b and the outer peripheral surface 15d of the cylindrical portion 15 intersect.

  Also in this example, since the recessed part 18b is formed in the connection part 18a of the lip | rip part 18 similarly to Example 1, the effect similar to Example 1 can be exhibited.

(Example 3)
In this example, as shown in FIG. 6, the first displacement portion 18f and the second displacement portion 18g of the lip portion 18 are different from the first embodiment in that a stepped step portion is formed. The lip portion 18 extends radially inward from the inner peripheral surface 14c of the thick portion 14b. The lip portion 18 changes its direction from the inner peripheral surface 14c of the thick portion 14b to the radially inner side at an angle of 90 ° in the concave second displacement portion 18g, and extends toward the radially inner side. The lip portion 18 changes its direction radially inward at a 90 ° angle in the concave first displacement portion 18f radially inward of the recess portion 18b. The lip portion 18 extends to the tip end portion 18c along the radially inner side.

  The position in the axial direction of the opening end 18h of the recess 18b is the same as the peripheral surface 14d of the thick portion 14b forming the engagement groove 14a. Also in this example, the swing fulcrum P1 of the lip portion 18 and the swing fulcrum P2 of the thick portion are at the same positions as in the first embodiment.

  Also in this example, since the recessed part 18b is formed in the connection part 18a of the lip | rip part 18 similarly to Example 1, the effect similar to Example 1 can be exhibited.

It is sectional drawing of the holding structure of the inlet filler pipe which concerns on Example 1 of this invention. 2 is a cutaway perspective view of an elastic seal member in Embodiment 1. FIG. FIG. 3 is an enlarged cross-sectional view of a main part showing a dimensional relationship of an elastic seal member in Example 1. It is a principal part expanded sectional view of the holding structure of an inlet filler pipe in Example 1. FIG. 5 is an enlarged cross-sectional view of a main part of an elastic seal member of Example 2. FIG. 6 is an enlarged cross-sectional view of a main part of an elastic seal member of Example 3. FIG. It is a principal part expanded sectional view of the holding structure of the inlet filler pipe of a prior art example. It is a principal part expanded sectional view which shows the rocking | fluctuation fulcrum of an elastic seal member in a prior art example. It is a principal part expanded sectional view of the holding structure of an inlet filler pipe for showing the problem in a prior art example.

Explanation of symbols

1: elastic seal member, 3: wheel house outer, 4: side member outer, 5: inlet filler pipe, 10: communication hole, 13: inner holding portion, 13a, 14a: engagement groove (engagement portion), 13b, 14b: thick part, 13c, 14c: inner peripheral surface, 13d, 14d: peripheral surface, 13f, 14f: seal lip part, 14: outer holding part, 15: cylindrical part, 15a: first projecting part, 15b: Bending portion, 15c: second overhanging portion, 18: lip portion, 18a: connecting portion, 18b: recessed portion, 18c: tip portion, 18e: outer peripheral surface, 18f: first displacement portion, 18g: second displacement portion, 18h : Open end, 18i: Bottom, 18p: Inner peripheral surface, 30: Inner through hole, 31, 41: Periphery, 40: Outer through hole, 51: Outer peripheral surface.

Claims (4)

An inlet filler pipe,
A vehicle body side panel having a through hole;
A cylindrical portion, a thick portion extending radially outward at one axial end portion of the cylindrical portion, and an outer peripheral surface of the cylindrical portion and a peripheral surface extending radially outward of the thick portion. An elastic seal member having an engagement portion held at the periphery of the through hole and a lip portion extending radially inward from the inner peripheral surface of the thick portion and elastically contacting the outer peripheral surface of the inlet filler pipe; With
The lip portion is formed on the radially inner side to be elastically contacted with the inlet filler pipe, a connecting portion adjacent to the inner peripheral surface of the thick portion, and the other end portion in the axial direction of the connecting portion. An inlet formed by an opposing inner peripheral surface and an inner peripheral surface of the thick portion and recessed from the other end in the axial direction toward one end in the axial direction. Filler pipe holding structure.   The holding of the inlet filler pipe according to claim 1, wherein a central portion of the lip portion in the thickness direction of the connecting portion has a different axial position with respect to the peripheral surface of the thick portion. Construction.   An angle of the lip portion with respect to the radial direction is changed to an inner surface in a radial direction from the hollow portion of the lip portion, and an outer circumferential surface facing away from the inner circumferential surface on which the hollow portion is formed. It has a displacement part, The holding structure of the inlet filler pipe of Claim 1 or Claim 2 characterized by the above-mentioned.   An angle of the lip portion with respect to the radial direction changes to a portion of the outer peripheral surface facing the inner peripheral surface where the hollow portion of the lip portion is formed and having the same radial position as the hollow portion. The holding structure for an inlet filler pipe according to any one of claims 1 to 3, further comprising a second displacement portion.

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