JP7121665B2 - Mounting structure of exhaust pipe finisher - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mounting structure for an exhaust pipe finisher of a vehicle that guides exhaust gas discharged from an exhaust pipe to the rear of a rear bumper face.

BACKGROUND ART As a rear structure of a vehicle, there is known a structure in which exhaust gas discharged from an exhaust pipe is guided to the rear of the vehicle by an exhaust pipe finisher (see Patent Document 1, for example).

In the exhaust pipe finisher mounting structure of Patent Document 1, an exhaust port that penetrates in the longitudinal direction of the vehicle body is provided in the rear bumper face at the rear of the vehicle body, and a substantially cylindrical exhaust pipe finisher (extension ) is installed. An end portion of the exhaust pipe is inserted through the front portion of the exhaust pipe finisher, and a rear end portion of the exhaust pipe finisher is inserted through an exhaust port of the rear bumper face. A cover member (baffle) is attached to the inner peripheral edge of the exhaust port of the rear bumper face. An opening is formed in the cover member so as to face the rear end of the exhaust pipe finisher. Exhaust gas discharged from the exhaust pipe passes through the interior of the exhaust pipe finisher and is exhausted to the rear of the rear bumper face through the opening of the cover member.

Japanese Patent No. 5347796

However, in the mounting structure of the exhaust pipe finisher disclosed in Patent Document 1, the exhaust pipe finisher is mounted to the rear bumper face via a separate bracket.

In addition, in the mounting structure of the exhaust pipe finisher of Patent Document 1, the exhaust pipe finisher and the covering member are individually mounted to the rear bumper face. Gap management) is difficult. Therefore, it is difficult to accurately maintain the relative position between the opening of the cover member and the rear end of the exhaust pipe finisher (relative position in the longitudinal direction of the vehicle body and in the vertical and horizontal directions of the vehicle body). is concerned.

Furthermore, in the mounting structure of the exhaust pipe finisher of Patent Document 1, it is difficult to precisely maintain the gap between the opening of the cover member and the rear end of the exhaust pipe finisher. , the heat of the exhaust gas is transferred to the outer side surface of the rear bumper face through the cover member.

Therefore, the present invention enables the exhaust pipe finisher and the cover member to be assembled to the rear bumper face with high precision without increasing the number of parts, and suppresses heat conduction from the rear end of the exhaust pipe finisher to the rear bumper face. An object of the present invention is to provide a mounting structure for an exhaust pipe finisher.

In order to solve the above problems, the attachment structure of the exhaust pipe finisher according to the present invention employs the following configuration.
That is, the mounting structure of the exhaust pipe finisher according to one aspect of the invention of the present application is a rear bumper face (for example, The rear bumper face 10 of the embodiment), an exhaust pipe that discharges exhaust gas (for example, the exhaust pipe 12 of the embodiment), and an exhaust pipe finisher that guides the exhaust gas discharged from the exhaust pipe to the rear of the rear bumper face ( For example, the exhaust pipe finisher 15 of the embodiment has an insertion hole (for example, the insertion hole 17 of the embodiment) through which the rear end of the exhaust pipe finisher is inserted, and the inner peripheral edge of the exhaust port is a covering member (for example, the covering member 14 of the embodiment) for covering the exhaust pipe finisher with a predetermined gap between the outer peripheral surface of the rear end portion and the insertion hole, and the covering member Positioning and fixing are performed, and the covering member is attached to the rear bumper face, and the positioning and fixing portion of the exhaust pipe finisher and the covering member is a first position-fixing portion capable of adjusting the relative positions of the exhaust pipe finisher and the covering member. The positioning fixing portion has a position adjusting portion, and the positioning fixing portion protrudes from the cover member and has a mounting hole (for example, the mounting hole 29 in the embodiment) penetrating in the vertical direction. a first projecting piece 28A, a second projecting piece 28B), and a fastening member (for example, the stepped bolt 30 of the embodiment) that is inserted into the mounting hole and fastens and fixes the cover member to the exhaust pipe finisher. The first position adjusting portion is a first rib that protrudes from the inner surface of the mounting hole and regulates the displacement of the fastening member in one direction perpendicular to the axial direction of the fastening member (for example, in the embodiment). It is characterized by having a first rib 32) of

With the above configuration, the exhaust pipe finisher is integrally fixed to the cover member in a positioned state. In this state, the exhaust pipe finisher is attached to the rear bumper face via the covering member. Therefore, when this attachment portion structure is adopted, the exhaust pipe finisher can be accurately attached to the rear bumper face without using a separate bracket or the like. Therefore, when this configuration is adopted, it is possible to reduce the number of parts and reduce the product cost.
Further, in this configuration, the exhaust pipe finisher and the covering member are directly positioned and fixed, so the assembly accuracy of the exhaust pipe finisher and the covering member increases. Therefore, the relative position between the insertion hole of the cover member and the rear end portion of the exhaust pipe finisher can be kept constant with high accuracy. Therefore, when this configuration is adopted, it is possible to improve the appearance from outside the vehicle.
Furthermore, in this configuration, the gap between the insertion hole of the cover member and the rear end portion of the exhaust pipe finisher can be kept constant with high accuracy. Therefore, the heat of the exhaust pipe finisher heated by the exhaust gas is less likely to be transmitted to the outer surface of the rear bumper face through the covering member.

Further, in this case, by appropriately adjusting the relative positions of the exhaust pipe finisher and the cover member by the first position adjustment unit, and fixing the exhaust pipe finisher and the cover member in that state, the gap between the exhaust pipe finisher and the cover member can be adjusted. assembly accuracy can be improved.

In this case, the position of the fastening member in one direction within the mounting hole is finely adjusted by changing the projection height of the first rib by, for example, adjusting the mold surface for shaping the exhaust pipe finisher. be able to. When the position of the fastening member in the mounting hole in one direction is adjusted, the relative positions of the exhaust pipe finisher and the cover member in one direction are also changed accordingly.

The first position adjusting portion is a second rib that protrudes from the inner surface of the mounting hole and regulates displacement of the fastening member in another direction orthogonal to the axial direction of the fastening member (for example, the second rib in the embodiment). A configuration having two ribs 33) may also be used.
In this case, for example, the position of the fastening member in the mounting hole in the other direction can be finely adjusted by changing the protrusion height of the second rib by adjusting the mold surface for shaping the exhaust pipe finisher. can. When the position of the fastening member in the mounting hole in the other direction is adjusted, the relative positions of the exhaust pipe finisher and the cover member in the other direction are also changed accordingly.

The one direction is a direction perpendicular to a tangent line (for example, the tangent line T in the embodiment) of an arc shape at an arbitrary position on the rear outer surface of the horizontal cross section of the rear bumper face, and the other direction is a direction along the tangent line. It is desirable to have
In this case, by adjusting the projecting heights of the first rib and the second rib, it is possible to adjust the relative positions of the exhaust pipe finisher and the cover member in the horizontal direction. It is possible to easily adjust the position even with respect to the arcuate outer surface of the rear part.

The first position adjusting portion has a third rib (for example, the third rib 34 of the embodiment) projecting from a surface of the projecting piece facing the exhaust pipe finisher in the vertical direction. Also good.
In this case, for example, the height of the facing surface of the projecting piece can be finely adjusted by changing the protrusion height of the third rib by adjusting the mold surface for shaping the exhaust pipe finisher. When the height of the facing surface of the projecting piece is adjusted, the relative positions of the exhaust pipe finisher and the cover member in the vertical direction are also changed accordingly.

The rear end portion of the exhaust pipe finisher may be configured by an annular wall having a hollow portion (for example, hollow portion 50 in the embodiment).
In this case, since the wall of the rear end portion of the exhaust pipe finisher has a hollow portion, the hollow portion functions as a heat insulating layer. Therefore, the heat of the exhaust gas passing through the exhaust pipe finisher is less likely to be transferred to the cover member. Further, in this configuration, since the wall of the rear end portion of the exhaust pipe finisher has a hollow portion, the wall of the rear end portion becomes thick. Therefore, the gap between the insertion hole of the cover member and the rear end portion of the exhaust pipe finisher is not noticeable when viewed from the rear of the vehicle. Therefore, when this configuration is adopted, the appearance from the rear of the vehicle is improved.

An exhaust pipe finisher mounting portion structure according to another invention of the present application is a rear bumper face (for example, an exhaust port 11 in the embodiment) that is disposed at the rear portion of the vehicle body and has an exhaust port (for example, the exhaust port 11 in the embodiment) that penetrates in the longitudinal direction of the vehicle body. rear bumper face 10), an exhaust pipe for discharging exhaust gas (for example, the exhaust pipe 12 of the embodiment), and an exhaust pipe finisher for guiding the exhaust gas discharged from the exhaust pipe to the rear of the rear bumper face (for example, Exhaust pipe finisher 15 of the embodiment) and a cover having an insertion hole (for example, the insertion hole 17 of the embodiment) through which the rear end of the exhaust pipe finisher is inserted, and covering the inner peripheral edge of the exhaust port and a member (for example, the cover member 14 of the embodiment), wherein the exhaust pipe finisher is positioned and fixed to the cover member with a predetermined gap between the outer peripheral surface of the rear end portion and the insertion hole. The cover member is attached to the rear bumper face, and the rear end portion of the exhaust pipe finisher is configured by a pair of bifurcated bifurcated cylinders (for example, the bifurcated cylinder 15B of the embodiment). , the cover member has a partition wall (e.g., the partition wall 18 of the embodiment) that partitions the insertion hole into left and right branched hole portions (e.g., the branched hole portion 17a of the embodiment), and each of the branched holes and the cover member is engaged with the edge of the exhaust port of the rear bumper face at positions above and below the partition wall . and
In this case, since the cover member is engaged with the rear bumper face at the upper and lower positions of the partition wall, the upper and lower edges of the exhaust port of the rear bumper face are supported by the partition wall. Therefore, the exhaust port of the rear bumper face is less likely to deform vertically.

The partition wall may be formed such that the width in the horizontal direction gradually increases from the central region in the vertical direction toward each of the upper and lower end portions.
In this case, the vertical load acting on the center region of the insertion hole in the horizontal direction can be effectively received by the partition wall.

A flange portion (for example, the inner flange portion 14b in the embodiment) extending toward the vehicle front side with respect to the vehicle outer side surface of the cover member may be provided at the opening edge portion of the insertion hole of the cover member.
In this case, the rigidity of the peripheral portion of the insertion hole is increased by the flange portion, making it difficult for the peripheral portion of the insertion hole to deform.

A mounting portion structure for an exhaust pipe finisher according to still another aspect of the present application is a rear bumper face (for example, an embodiment) having an exhaust port (for example, an exhaust port 11 in the embodiment) that is disposed at the rear portion of the vehicle body and penetrates in the longitudinal direction of the vehicle body. a rear bumper face 10 in the embodiment), an exhaust pipe for discharging exhaust gas (for example, the exhaust pipe 12 in the embodiment), and an exhaust pipe finisher for guiding the exhaust gas discharged from the exhaust pipe to the rear of the rear bumper face (for example, , the exhaust pipe finisher 15 of the embodiment) and an insertion hole (for example, the insertion hole 17 of the embodiment) through which the rear end portion of the exhaust pipe finisher is inserted, and covers the inner peripheral edge portion of the exhaust port. A cover member (for example, the cover member 14 of the embodiment) is provided, and the exhaust pipe finisher is positioned on the cover member with a predetermined gap between the outer peripheral surface of the rear end portion and the insertion hole. The cover member is fixed to the rear bumper face, and a fitting wall (for example, the fitting wall 11a in the embodiment) extending forward of the vehicle body is formed on the inner peripheral edge of the exhaust port of the rear bumper face. is formed, and a fitting groove (for example, the fitting groove 19 of the embodiment) into which the fitting wall is fitted from the rear side of the vehicle body is formed on the outer edge of the insertion hole of the cover member, and the fitting Between the wall and the fitting groove, a second position adjustment part (for example, the position adjustment ribs 20 and 21 of the embodiment) is provided that can adjust the relative position of the fitting wall and the fitting groove. It is characterized by
In this case, the relative positions of the fitting wall and the fitting groove are appropriately adjusted by the second position adjusting portion, and the rear bumper face and the cover member are fixed in this state, so that the cover member is positioned relative to the exhaust port of the rear bumper face. can be assembled with high precision.

In the present invention, the exhaust pipe finisher is positioned and fixed to the cover member, and the cover member is attached to the rear bumper face. Therefore, it is possible to suppress an increase in the number of parts and improve the assembly accuracy of the exhaust pipe finisher and the cover member. Therefore, according to the present invention, the exhaust pipe finisher and the cover member can be accurately assembled to the rear bumper face without increasing the number of parts.
Further, in the present invention, since the gap between the insertion hole of the cover member and the rear end portion of the exhaust pipe finisher can be kept constant with high precision, heat conduction from the rear end portion of the exhaust pipe finisher to the rear bumper face is suppressed. can do.

It is a rear view of the vehicle of the embodiment. It is a bottom view of the rear portion of the vehicle of the embodiment. FIG. 4 is a perspective view of an attachment portion of the exhaust pipe finisher of the embodiment; It is a perspective view of the rear bumper face to which the covering member of the embodiment is attached. FIG. 4 is a cross-sectional view taken along line VV of FIG. 3; 2 is an enlarged cross-sectional view taken along line VI-VI of FIG. 1; FIG. It is a partial cross-sectional perspective view of the cover member of embodiment, and a rear bumper face. FIG. 4 is a cross-sectional view along line VIII-VIII of FIG. 3; FIG. 9 is an enlarged view (A) of the IXa section in FIG. 8 and an enlarged view (B) of the IXb section in FIG. 8 together. FIG. 5 is a view in the direction of arrow X in FIG. 4; FIG. 4 is a cross-sectional view along line XI-XI of FIG. 3 with some parts removed; FIG. 5 is a cross-sectional view for explaining adjustment of relative positions of the cover member and the exhaust pipe finisher;

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described below with reference to the drawings. In the drawings, the arrow FR points forward of the vehicle 1, the arrow UP points upward of the vehicle 1, and the arrow LH points leftward of the vehicle.

FIG. 1 is a rear view of the vehicle 1 of the embodiment, and FIG. 2 is a bottom view of the rear portion of the vehicle 1 of the embodiment. 1 and 2, some parts are omitted.
A rear bumper face 10 made of resin is attached to the rear portion of the vehicle so as to cover the lower rear surface of the vehicle body. The rear bumper face 10 extends along the width direction of the vehicle, with left and right edges gently curving toward the front of the vehicle body. Horizontally elongated substantially rectangular exhaust ports 11 are formed in the left and right edges of the rear bumper face 10 so as to penetrate in the longitudinal direction of the vehicle body.

An exhaust pipe 12 connected to an internal combustion engine (not shown) is installed under the vehicle body. As shown in FIG. 2, the exhaust pipe 12 extends from the internal combustion engine in the front portion of the vehicle body toward the rear side of the vehicle body, and branches left and right in the vehicle width direction at the rear portion of the vehicle body. A muffler 13 is interposed between the left and right branch pipes 12A of the exhaust pipe 12, and terminal portions 12Aa of the respective branch pipes 12A extending from the muffler 13 are directed toward the left and right exhaust ports 11 of the rear bumper face 10. . A metal exhaust pipe finisher 15 is attached to the vicinity of each of the left and right exhaust ports 11 of the rear bumper face 10 via a resin cover member 14 that covers the inner peripheral edge of each exhaust port 11 . The exhaust pipe finisher 15 is formed in a substantially cylindrical shape and guides the exhaust gas discharged from the exhaust pipe 12 (branch pipe 12A) to the rear of the rear bumper face 10 .

FIG. 3 is a view showing the attachment portion of the exhaust pipe finisher 15 on the left side of the vehicle, and is a view of the attachment portion of the exhaust pipe finisher 15 viewed from the upper right front portion of the vehicle. FIG. 4 is a diagram showing a state in which the cover member 14 is attached to the left portion of the rear bumper face 10, and is a view of the mounting portion of the cover member 14 as seen from above the front portion of the vehicle. FIG. 5 is a cross-sectional view along line VV of FIG.
The mounting portions of the exhaust pipe finisher 15 on the left and right sides of the vehicle body have the same basic structure, although each portion is formed in a substantially symmetrical shape on the left and right sides. The mounting portion will be described below with reference to the drawings showing the mounting portion of the left exhaust pipe finisher 15, but the right mounting portion has the same configuration.

The exhaust pipe finisher 15 has a pair of branch pipes 15B connected to the rear portion of the main pipe 15A into which the end portion 12Aa of the exhaust pipe 12 (branch pipe 12A) is inserted. The main cylinder 15A is formed in a substantially fan-like top view shape whose width in top view expands rearward from the front end portion. A pair of branch pipes 15B are bifurcated from the front end portion of the main pipe 15A to the left and right. Exhaust gas discharged from the terminal portion 12Aa of the exhaust pipe 12 is introduced into the main cylinder 15A and then passed through the left and right branch cylinders 15B to be exhausted toward the rear side of the vehicle body. A connecting piece 16 that is fastened and fixed to the cover member 14 is welded to the upper surface of each of the left and right branch cylinders 15B.

The cover member 14 includes a horizontally long rectangular frame-shaped base wall 14a, an inner flange portion 14b (flange portion) that bends and extends from the inner peripheral edge of the base wall 14a toward the front of the vehicle body, and an outer peripheral edge of the base wall 14a. An outer flange portion 14c that bends and extends toward the front of the vehicle body, a first bumper fixing piece 14d that bends and extends toward the upper side of the vehicle body from the extension end of the outer flange portion 14c on the upper side, and an outer flange portion 14c on the lower side. and a second bumper fixing piece 14e that is bent stepwise from the extended end and extends toward the front side of the vehicle body.

6 is an enlarged cross-sectional view taken along line VI-VI of FIG. 1, and FIG. 7 is a partially cross-sectional perspective view of the cover member 14 and the rear bumper face 10 in which the vicinity of the cross-section of FIG. 6 has the same cross-section. .
The base wall 14a of the cover member 14 is a wall whose substantially entire area faces the rear side of the vehicle body when the cover member 14 is attached to the rear bumper face 10 . The inner peripheral surfaces of the base wall 14a and the inner flange portion 14b form an insertion hole 17 through which the rear end portion (branch cylinder 15B) of the exhaust pipe finisher 15 is inserted.

As shown in FIGS. 3 to 5, a partition wall 18 connects the upper side and the lower side of the base wall 14a and connects these widthwise central regions. The partition wall 18 divides the inside of the insertion hole 17 into left and right, and separates the inside of the insertion hole 17 into left and right branched hole portions 17a. Corresponding left and right branch pipes 15B of the exhaust pipe finisher 15 are inserted into the left and right branch holes 17a with a predetermined gap h1 (see FIG. 6). As shown in FIG. 4, the partition wall 18 is formed so that the width in the horizontal direction gradually increases from the central region in the vertical direction toward each of the upper and lower ends. The partition wall 18 is formed in a flange-like protuberance toward the front side of the vehicle body so as to connect the upper side and the lower side of the base wall 14a with high rigidity. The partition wall 18 is formed thick in the longitudinal direction of the vehicle body so as to be continuous with the inner flange portions 14b on the upper side and the lower side.

As shown in FIGS. 6 and 7, a fitting wall 11a is formed on the inner peripheral edge of the exhaust port 11 of the rear bumper face 10 so as to bend and extend toward the front side of the vehicle body. The fitting wall 11 a is formed over substantially the entire circumference of the exhaust port 11 . On the other hand, the base wall 14a of the cover member 14 has a fitting groove 19 recessed toward the front side of the vehicle body in the edge portion closer to the inner periphery (the outer edge portion of the insertion hole 17). A fitting wall 11 a of the rear bumper face 10 is fitted into the fitting groove 19 . A region of the base wall 14a inside the fitting groove 19 is formed as a cover surface 14a-1 exposed rearward of the vehicle body through the exhaust port 11 of the rear bumper face 10. As shown in FIG.

A position adjusting rib 20 (longitudinal rib) having a predetermined width extending along the groove width direction of the fitting groove 19 is formed on the bottom wall of the fitting groove 19 of the cover member 14 . Position adjustment ribs 21 (horizontal ribs) having a predetermined width extending along the extending direction of the fitting groove 19 are formed on the side walls of the fitting groove 19 (in FIGS. 6 and 7 , the walls located on the upper side). formed. As shown in FIG. 6, the position adjusting rib 20 formed on the bottom wall of the fitting groove 19 is abutted against the end surface of the fitting wall 11a on the side of the rear bumper face 10 so that the rear end of the exhaust port 11 of the rear bumper face 10 is pushed. and the cover surface 14a-1 of the cover member 14 relative to each other in the longitudinal direction of the vehicle body (the distance d2 in the longitudinal direction of the vehicle body). On the other hand, the position adjustment rib 21 formed on the side wall of the fitting groove 19 abuts against the side surface of the fitting wall 11a on the side of the rear bumper face 10 (the upper wall surface in FIGS. 6 and 7). and the side wall of the fitting groove 19 of the cover member 14 are restricted. The protrusion heights of the position adjustment ribs 20 and 21 can be finely adjusted by changing the depth of the rib forming portion of the mold surface when the rear bumper face 10 is molded.
In this embodiment, the position adjustment ribs 20 and 21 projecting into the fitting groove 19 of the cover member 14 constitute a second position adjustment portion.

As shown in FIG. 6, the branch pipe 15B of the exhaust pipe finisher 15 is formed so that the outer peripheral surface is tapered toward the tip side. Therefore, when looking into the gap h1 between the insertion hole 17 of the cover member 14 and the branch tube 15B from the rear side, the gap h1 appears to be blocked by the inclined outer peripheral surface of the branch tube 15B. Therefore, since the inside of the rear bumper face 10 cannot be seen through the gap h1, the appearance is improved.

The branch pipe 15B (rear end portion) of the exhaust pipe finisher 15 is configured by an annular wall having a hollow portion 50, as shown in FIG. The hollow portion 50 functions as a heat insulating layer that blocks the heat of the exhaust gas transmitted to the inner peripheral side of the branch cylinder 15B (rear end portion) from being transmitted toward the inner flange portion 14b of the cover member 14 .

As shown in FIGS. 3, 4, etc., a plurality of elongated locking holes 22 are formed in the peripheral area of the base wall 14a of the cover member 14 so as to be spaced apart in the circumferential direction. Two of the plurality of locking holes 22 are formed at upper and lower positions of the partition wall 18 . Note that the locking hole 22 arranged above and the locking hole 22 arranged below the partition wall 18 are given reference numerals 22u and 22l in parentheses to distinguish them from others.

On the other hand, the fitting wall 11a of the rear bumper face 10 has a plurality of engaging projections 23 protruding toward the front side of the vehicle body from the end face in the extending direction. Each locking protrusion 23 is formed in a plate shape at a position corresponding to each locking hole 22 of the cover member 14 . The cover member 14 is locked in position with respect to the rear bumper face 10 by fitting the locking projections 23 corresponding to the respective locking holes 22 . When the locking projections 23 are fitted into the locking holes 22u and 22l located at the upper and lower positions of the partition wall 18, the partition wall 18 separates the upper and lower sides of the exhaust port 11 on the rear bumper face 10 side. will be supported.

A long hole-shaped guide hole 24 is formed substantially horizontally in the first bumper fixing piece 14 d of the cover member 14 . A large guide projection 25 projecting from the front surface of the rear bumper face 10 is inserted into the guide hole 24 . By inserting the guide projections 25 into the guide holes 24 , the cover member 14 can be assembled with respect to the rear bumper face 10 .

Locking holes 26 and 27 are formed in the first bumper fixing piece 14d and the second bumper fixing piece 14e of the cover member 14, respectively, as shown in FIGS. A locking member (not shown) such as a clip or bolt is inserted into each of the locking holes 26 and 27 to finally lock and fix the cover member 14 to the rear bumper face 10 .

FIG. 8 is a cross-sectional view along line VIII-VIII of FIG. 9A is an enlarged view of the IXa portion of FIG. 8, and FIG. 9B is an enlarged view of the IXb portion of FIG. 10 is a view in the direction of arrow X in FIG. 4, and FIG. 11 is a cross-sectional view taken along line XI-XI in FIG. 3 with some parts removed.
As shown in FIGS. 3, 4, etc., on the base side of the first bumper fixing piece 14d of the cover member 14, a first projecting piece 28A and a second projecting piece 28B are provided so as to be spaced apart in the vehicle width direction. ing. The first projecting piece 28A projects toward the front of the vehicle body from the vehicle width direction right side portion of the base of the first bumper fixing piece 14d, and the second projecting piece 28B projects from the base of the first bumper fixing piece 14d. It protrudes toward the front side of the vehicle body from the left side portion in the vehicle width direction. The first projecting piece 28A overlaps the upper surface of the connecting piece 16 on the right side of the exhaust pipe finisher 15, and is positioned and fixed to the connecting piece 16 in this state. The second projecting piece 28B overlaps the upper surface of the left connecting piece 16 of the exhaust pipe finisher 15 and is positioned and fixed to the connecting piece 16 in this state.
In the present embodiment, the fixing portion between the first projecting piece 28A and the right connecting piece 16 and the fixing portion between the second projecting piece 28B and the left connecting piece 16 serve as positioning and fixing portions for the cover member 14 and the exhaust pipe finisher 15. Configure.

FIG. 12 is a cross-sectional view of the positioning fixing portion showing how the positions of the cover member 14 and the exhaust pipe finisher 15 are adjusted.
As shown in FIG. 12, the first projecting piece 28A and the second projecting piece 28B are formed with mounting holes 29 penetrating vertically. A stepped bolt 30 (see FIGS. 3 and 12), which is a fastening member, is inserted into the mounting hole 29 from above. it's locked up. Therefore, the cover member 14 and the exhaust pipe finisher 15 are fixed to each other by tightening the stepped bolt 30 and the weld nut 31 .
8 to 11, the stepped bolt 30 is omitted.

A pair of first ribs 32 for restricting displacement in a first direction (one direction) orthogonal to the axial direction of the stepped bolt 30 are formed on the inner surfaces of the mounting holes 29 of the first projecting piece 28A and the second projecting piece 28B. protruded. The pair of first ribs 32 protrude along the first direction from opposing positions on the inner surface of the mounting hole 29 . Therefore, the end faces in the projecting direction of the pair of first ribs 32 face each other in the first direction. The first direction will be explained later. The end faces of the pair of first ribs 32 in the protruding direction contact the outer surface of the large-diameter shaft portion of the stepped bolt 30 in the first direction, thereby providing the stepped bolt with respect to the first projecting piece 28A and the second projecting piece 28B. Regulates the relative position of 30 in the first direction. At this time, the relative positions of the cover member 14 and the exhaust pipe finisher 15 in the first direction are restricted.

A pair of second ribs 33 for restricting displacement in a second direction (the other direction) perpendicular to the axial direction of the stepped bolt 30 are further projected from the inner surface of the mounting hole 29 of the first projecting piece 28A. The pair of second ribs 33 protrude in the second direction from opposing positions on the inner surface of the mounting hole 29 . The second direction will be explained later. The protruding end surfaces of the pair of second ribs 33 abut on the outer surface of the large-diameter shaft portion of the stepped bolt 30 in the second direction. As a result, the relative position of the stepped bolt 30 in the second direction with respect to the first projecting piece 28A is restricted, and as a result, the relative position of the cover member 14 and the exhaust pipe finisher 15 in the second direction is also restricted. The second rib 33 is not provided on the inner surface of the mounting hole 29 of the second projecting piece 28B. The reason for this will be detailed later.

The first direction (one direction) is a direction perpendicular to the arc-shaped tangent line T at an arbitrary position P on the rear outer surface of the horizontal cross section of the rear bumper face 10 as shown in FIG. , along the tangent T. In this embodiment, the tangent line T is an orthogonal line Q passing through the midpoint of a straight line connecting the center of the fastening portion of the first projecting piece 28A and the center of the fastening portion of the second projecting piece 28B, and the rear outer surface of the rear bumper face 10. is the tangent line at the position P where the curved surface of .

As shown in FIG. 10, third ribs 34 project from the lower surface of the first projecting piece 28A so as to surround the lower edge of the mounting hole 29 from three sides. The first projecting piece 28A abuts on the upper surface of the connecting piece 16 via the third rib 34 . Although not shown, a third rib 34 protrudes from the lower surface of the second protruding piece 28B in the same manner as the lower surface of the first protruding piece 28A.

In this embodiment, the first, second and third ribs 32, 33 and 34 of the first projecting piece 28A and the first and third ribs 32 and 34 of the second projecting piece 28B are connected to the cover member 14 and the exhaust air. It constitutes a first position adjusting section between the tube finishers 15 . The cover member 14 and the exhaust pipe finisher 15 can finely adjust the relative positions of the cover member 14 and the exhaust pipe finisher 15 by appropriately changing the projection heights of the first, second and third ribs 32, 33 and 34. can be done. The protrusion heights of the first, second, and third ribs 32, 33, and 34 can be changed, for example, by increasing or decreasing the depth of the recessed portion of the mold surface of the mold for shaping the cover member 14. be able to.

FIG. 12A shows the relative positions of the cover member 14 and the exhaust pipe finisher 15 in the standard state. In FIG. 12B, the protrusion height of the first rib 32 (second rib 33) on the right side of the figure is increased, and the protrusion height of the first rib 32 (second rib 33) on the left side of the figure is increased. It is the figure which showed the mode when lowered. In this state, the position of the covering member 14 is adjusted so that it moves rightward in the figure with respect to the exhaust pipe finisher 15 .
12C, on the contrary, the projection height of the first rib 32 (second rib 33) on the left side of the drawing is increased, and the first rib 32 (second rib 33) on the right side of the drawing is increased. is a diagram showing a state when the protrusion height of is lowered. In this state, the cover member 14 is positioned so as to move leftward in the figure with respect to the exhaust pipe finisher 15 .

The reason why the second rib 33 is not provided on the inner surface of the mounting hole 29 of the second projecting piece 28B is as follows.
In this embodiment, the first projecting piece 28A and the second projecting piece 28B are spaced apart in the second direction (substantially in the vehicle width direction) as shown in FIG. Therefore, if the second ribs 33 (position restricting portions) are provided on both the first projecting piece 28A and the second projecting piece 28B spaced apart in the second direction, the exhaust finisher, which is a resin component, may When 15 thermally expands, a large stress is generated at the contact portion of each projecting piece with the stepped bolt 30 . In this embodiment, the second rib 33, which is the position restricting portion, is provided only in the mounting hole 29 of the first projecting piece 28A, thereby preventing excessive stress caused by the thermal expansion of the exhaust finisher 115. FIG.

As described above, in the mounting structure of the exhaust pipe finisher 15 of the present embodiment, the exhaust pipe finisher 15 is positioned and fixed to the cover member 14 , and the cover member 14 is mounted to the rear bumper face 10 in this state. Therefore, compared to the case where the exhaust pipe finisher 15 is attached to the rear bumper face 10 via a separate bracket or the like, an increase in the number of parts can be suppressed, and the combination of the exhaust pipe finisher 15 and the cover member 14 can be suppressed. Accuracy can be improved.
Therefore, when the attachment structure of the exhaust pipe finisher 15 of the present embodiment is adopted, the exhaust pipe finisher 15 and the covering member 14 can be accurately assembled to the rear bumper face 10 without increasing the number of parts.

Furthermore, the structure of the mounting portion of the exhaust pipe finisher 15 of the present embodiment can keep the gap h1 between the insertion hole 17 of the cover member 14 and the rear end portion (branch cylinder 15B) of the exhaust pipe finisher 15 constant with high precision. Therefore, the heat transfer from the rear end portion (branch tube 15B) of the exhaust pipe finisher 15 to the rear bumper face 10 can be suppressed.
Therefore, when the mounting portion structure of the exhaust pipe finisher 15 of the present embodiment is adopted, the heat of the exhaust pipe finisher 15 heated by the exhaust gas is prevented from being transmitted to the outer side surface of the rear bumper face 10 through the cover member 14. can be suppressed.

In addition, the mounting structure of the exhaust pipe finisher 15 of the present embodiment is such that the positioning and fixing portion of the exhaust pipe finisher 15 and the cover member 14 can easily adjust the relative positions of the exhaust pipe finisher 15 and the cover member 14. there is Therefore, the relative positions of the exhaust pipe finisher 15 and the covering member 14 can be appropriately adjusted, and the exhaust pipe finisher 15 and the covering member 14 can be fixed in that state. Therefore, assembly accuracy between the exhaust pipe finisher 15 and the cover member 14 can be further improved.

Specifically, in the mounting structure of the exhaust pipe finisher 15 of the present embodiment, the first and second projecting pieces 28A and 28B of the cover member 14 are adjusted as a relative position adjustment portion between the exhaust pipe finisher 15 and the cover member 14. A first rib 32 projecting in the first direction is provided on the inner surface of the mounting hole 29 . Therefore, the position of the stepped bolt 30 in the mounting hole 29 in the first direction can be finely adjusted by changing the protrusion height of the first rib 32 at the step of molding the cover member 14 . Accordingly, the relative positions of the exhaust pipe finisher 15 and the cover member 14 in the first direction can be adjusted accordingly.

In addition, the mounting portion structure of the exhaust pipe finisher 15 of the present embodiment protrudes in the second direction from the inner surface of the mounting hole 29 of the first projecting piece 28A as a portion for adjusting the relative position of the exhaust pipe finisher 15 and the cover member 14. A second rib 33 is provided. Therefore, the position of the stepped bolt 30 in the mounting hole 29 in the second direction can be finely adjusted by changing the protrusion height of the second rib 33 at the step of molding the cover member 14 . Accordingly, the relative positions of the exhaust pipe finisher 15 and the cover member 14 in the second direction can be adjusted.

In particular, in the mounting portion structure of the exhaust pipe finisher 15 of the present embodiment, the first direction is a direction orthogonal to the arc-shaped tangent line T at an arbitrary position P on the rear outer surface of the horizontal cross section of the rear bumper face 10, The direction is the direction along the tangent line T. Therefore, by adjusting the projecting heights of the first rib 32 and the second rib 33, the position of the exhaust pipe finisher 15 can be easily adjusted with respect to the arc-shaped rear outer surface of the horizontal section of the rear bumper face 10. can.

Further, in the structure of the mounting portion of the exhaust pipe finisher 15 of the present embodiment, the wall of the rear end portion (the branch cylinder 15B) of the exhaust pipe finisher 15 has the hollow portion 50 . Therefore, when this configuration is adopted, the hollow portion 50 functions as a heat insulating layer, so that the heat of the exhaust gas passing through the exhaust pipe finisher 15 is further suppressed from being transmitted to the cover member 14 side. can do.

Furthermore, in the present embodiment, the hollow portion 50 is provided in the wall of the rear end portion (branched cylinder 15B) of the exhaust pipe finisher 15, so that the wall of the rear end portion (branched cylinder 15B) becomes thick. Therefore, the gap h1 between the insertion hole 17 of the cover member 14 and the rear end portion (branch tube 15B) of the exhaust pipe finisher 15 is not noticeable when viewed from the rear of the vehicle. Therefore, when this configuration is adopted, the appearance from the rear of the vehicle is improved.

In addition, in the mounting structure of the exhaust pipe finisher 15 of the present embodiment, the cover member 14 has a partition wall 18, and the cover member 14 is positioned above and below the partition wall 18 to close the exhaust port 11 of the rear bumper face 10. Locked to the edge. Therefore, when this configuration is adopted, vertical deformation of the exhaust port 11 of the rear bumper face 10 can be advantageously prevented by the partition wall 18 of the cover member 14 .

Further, in the mounting structure of the exhaust pipe finisher 15 of the present embodiment, the width of the partition wall 18 in the left-right direction gradually increases from the central region in the vertical direction toward each of the upper and lower ends. Therefore, when this configuration is employed, the partition wall 18 stably receives the vertical load acting on the central region of the insertion hole 17, and deformation of the insertion hole 17 can be suppressed.

In addition, in the mounting portion structure of the exhaust pipe finisher 15 of the present embodiment, an inner flange portion 14b is provided at the opening edge portion of the insertion hole 17 of the cover member 14 so as to bend and extend from the base wall 14a toward the front side of the vehicle. . Therefore, when this configuration is adopted, the rigidity of the peripheral portion of the insertion hole 17 can be increased by the inner flange portion 14b, and deformation of the peripheral portion of the insertion hole 17 can be suppressed.

Further, in the mounting structure of the exhaust pipe finisher 15 of the present embodiment, a fitting wall 11a is provided on the inner peripheral edge of the exhaust port 11 of the rear bumper face 10, and a fitting groove 19 into which the fitting wall 11a is fitted is formed. Position adjustment ribs 20 and 21 are provided on the cover member 14 and between the fitting wall 11 a and the fitting groove 19 . Therefore, the relative positions of the fitting walls 11a and the fitting grooves 19 can be appropriately adjusted by appropriately changing the protrusion heights of the position adjusting ribs 20 and 21 when the rear bumper face 10 is molded. Therefore, when this configuration is adopted, the cover member 14 can be assembled to the rear bumper face 10 with high accuracy.

The present invention is not limited to the above-described embodiments, and various design changes are possible without departing from the gist of the present invention.

DESCRIPTION OF SYMBOLS 10... Rear bumper face 11... Exhaust port 11a... Fitting wall 12... Exhaust pipe 14... Cover member 14b... Inner flange part (flange part)
DESCRIPTION OF SYMBOLS 15... Exhaust pipe finisher 15B... Branch cylinder 17... Insertion hole 17a... Branch hole part 18... Partition wall 19... Fitting groove 20, 21... Position adjustment rib (second position adjustment part)
28A... First projecting piece (projecting piece)
28B... Second projecting piece (projecting piece)
29... Mounting hole 30... Stepped bolt 32... First rib 33... Second rib 34... Third rib 50... Hollow part T... Tangent line

Claims (9)

a rear bumper face having an exhaust port disposed at the rear part of the vehicle body and penetrating in the longitudinal direction of the vehicle body;
an exhaust pipe for discharging exhaust gas;
an exhaust pipe finisher that guides exhaust gas discharged from the exhaust pipe to the rear of the rear bumper face;
a cover member having an insertion hole through which the rear end of the exhaust pipe finisher is inserted and covering an inner peripheral edge of the exhaust port;
The exhaust pipe finisher is positioned and fixed to the cover member with a predetermined gap between the outer peripheral surface of the rear end portion and the insertion hole, and the cover member is attached to the rear bumper face,
The positioning fixing portion for the exhaust pipe finisher and the cover member has a first position adjustment portion capable of adjusting the relative position of the exhaust pipe finisher and the cover member,
The positioning and fixing portion includes a protruding piece protruding from the cover member and having a mounting hole penetrating in the vertical direction, and a fastening member inserted into the mounting hole to fasten and fix the cover member to the exhaust pipe finisher. and
The first position adjusting portion has a first rib projecting from the inner surface of the mounting hole and restricting displacement of the fastening member in one direction perpendicular to the axial direction of the fastening member. Mounting structure of the exhaust pipe finisher. The first position adjusting portion has a second rib protruding from the inner surface of the mounting hole for restricting displacement of the fastening member in another direction orthogonal to the axial direction of the fastening member. The mounting structure of the exhaust pipe finisher according to claim 1 . 2. The one direction is a direction perpendicular to a tangent line of an arc shape at an arbitrary position on the rear outer surface of the horizontal cross section of the rear bumper face, and the other direction is a direction along the tangent line. The mounting structure of the exhaust pipe finisher described in . 4. The first position adjusting portion according to any one of claims 1 to 3 , wherein the first position adjusting portion has a third rib projecting from a surface of the projecting piece facing the exhaust pipe finisher in the vertical direction. The mounting structure of the exhaust pipe finisher described in . The exhaust pipe finisher attachment structure according to any one of claims 1 to 4 , wherein the rear end portion of the exhaust pipe finisher is constituted by an annular wall having a hollow portion. a rear bumper face having an exhaust port disposed at the rear part of the vehicle body and penetrating in the longitudinal direction of the vehicle body;
an exhaust pipe for discharging exhaust gas;
an exhaust pipe finisher that guides exhaust gas discharged from the exhaust pipe to the rear of the rear bumper face;
a cover member having an insertion hole through which the rear end of the exhaust pipe finisher is inserted and covering an inner peripheral edge of the exhaust port;
The exhaust pipe finisher is positioned and fixed to the cover member with a predetermined gap between the outer peripheral surface of the rear end portion and the insertion hole, and the cover member is attached to the rear bumper face,
The rear end portion of the exhaust pipe finisher is configured by a pair of bifurcated cylinders bifurcated to the left and right,
The cover member has a partition wall that partitions the insertion hole into left and right branched hole portions, and the branched cylinder corresponding to the rear end portion is inserted through each of the branched hole portions,
The exhaust pipe finisher attachment structure , wherein the cover member is engaged with the edge of the exhaust port of the rear bumper face at positions above and below the partition wall. 7. The mounting portion of the exhaust pipe finisher according to claim 6 , wherein the width of the partition wall in the horizontal direction is formed so as to gradually increase from the central region in the vertical direction toward each of the upper and lower end portions. structure. 8. The opening edge of the insertion hole of the cover member is provided with a flange portion extending toward the vehicle front side with respect to the vehicle outer side surface of the cover member. The mounting structure of the exhaust pipe finisher described in . a rear bumper face having an exhaust port disposed at the rear part of the vehicle body and penetrating in the longitudinal direction of the vehicle body;
an exhaust pipe for discharging exhaust gas;
an exhaust pipe finisher that guides exhaust gas discharged from the exhaust pipe to the rear of the rear bumper face;
a cover member having an insertion hole through which the rear end of the exhaust pipe finisher is inserted and covering an inner peripheral edge of the exhaust port;
The exhaust pipe finisher is positioned and fixed to the cover member with a predetermined gap between the outer peripheral surface of the rear end portion and the insertion hole, and the cover member is attached to the rear bumper face,
A fitting wall extending forward of the vehicle body is formed on the inner peripheral edge of the exhaust port of the rear bumper face,
A fitting groove into which the fitting wall is fitted from the rear side of the vehicle body is formed in the outer edge of the insertion hole of the cover member,
An exhaust pipe finisher characterized in that a second position adjusting portion is provided between the fitting wall and the fitting groove for adjusting a relative position of the fitting wall and the fitting groove. Mounting structure .

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