JP2011148452A - Rear structure of saddle riding type vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a rear structure of a saddle riding type vehicle capable of facilitating mounting and dismounting work while reliably supporting a pillion step and holding external appearance. <P>SOLUTION: A frame side boss portion 71 is provided so as to project outwardly from a rear frame lateral surface 22A1 located outside in the vehicle width direction of a rear frame 22. A through-hole 72 of the frame side boss portion 71 is formed in the direction including at least the front-rear direction or vertical direction of the vehicle. A holder side boss portion 63 has a recess which is formed in a contact surface between the frame side boss portion 71 and thereof, and the recess has a female screw in which a bolt 81 is fastened. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a rear structure of a saddle-ride type vehicle.

  Some motorcycles include a pillion step where passengers place their feet. The pillion step mounting structure is provided with bosses on the left and right inner sides of a pair of left and right aluminum cast rear frames, the upper surface of the boss part of the stay of the pillion step is applied to the lower surface of the boss part, The structure which fastened the boss | hub part of this with the volt | bolt is disclosed. According to such a structure, it is possible to prevent the attachment portion of the pillion step from being seen (for example, see Patent Document 1).

JP 2009-214717 A

  However, in the conventional configuration, when removing the pillion step, it is necessary to remove the bolt from the boss portion on the left and right inner sides of the rear frame, and the removal work is complicated. Moreover, although not disclosed in the above-mentioned document, there are many cases in which housing parts such as fenders and supplementary notes are arranged between the left and right rear frames of the motorcycle, and if these parts are not removed, the pillion step mounting is required. There was a problem that could not access the above bolts.

  The present invention has been made in view of the above-described circumstances, and an object of the present invention is to provide a rear structure of a saddle-ride type vehicle that can easily support a pillion step and can be easily attached and detached while maintaining appearance. Yes.

  In order to solve the above-described problem, the present invention includes a rear frame provided on the left and right of a rear portion of a vehicle body, and a pillion step holder fastened to the rear frame and extending rearward. The rear frame includes a through hole. A rear structure of a saddle-ride type vehicle in which a frame-side boss portion is integrally provided, and a holder-side boss portion fastened by a bolt to the frame-side boss portion is integrally provided at a front portion of the pillion step holder. The frame-side boss portion is provided so as to protrude outwardly from the rear frame outer surface of the rear frame in the vehicle width direction, and the through hole includes at least a front-rear direction or a vertical direction of the vehicle. The holder-side boss is provided with a recess on the contact surface with the frame-side boss, and the bolt is fastened to the recess. That the internal thread is provided, wherein the bolt, characterized in that it is fastened from the vehicle longitudinal direction rear side or the vertical direction lower side.

  According to this configuration, the frame-side boss portion is provided so as to protrude outward from the rear frame outer surface of the rear frame in the vehicle width direction, and the through hole is at least in the vehicle front-rear direction or the upper and lower direction. The holder-side boss portion is provided with a recess on the contact surface with the frame-side boss portion, and the recess is provided with a female screw to which the bolt is fastened. Is fastened from the rear side in the vehicle front-rear direction or the lower side in the vertical direction, so that the attachment / detachment operation can be facilitated while maintaining the appearance while reliably supporting the pillion step.

In the above configuration, a surface on the rear frame side of the holder-side boss may be formed so as to be in contact with the outer surface of the rear frame. According to this configuration, the support of the load acting in the vehicle width direction from the pillion step holder can be shared by the contact surface between the holder-side boss and the rear frame outer surface, and the strength and rigidity can be easily secured.
Further, in the above configuration, a locking protrusion that protrudes inward in the vehicle width direction is integrally provided on a surface on the rear frame side of the holder-side boss portion, and the locking protrusion is formed on the outer surface of the rear frame. A locking recess for locking with the portion may be provided. According to this configuration, parts other than the fastening bolt can share the load in the vertical direction, the fastening bolt can be reduced in diameter, and the frame-side boss and the holder-side boss can be downsized.

  In the above configuration, the holder-side boss portion is provided with a cover portion that covers the frame-side boss portion in a side view, and the upper and lower portions of the cover portion are extended until they contact the outer surface of the rear frame. You may do it. According to this configuration, it is possible to prevent the frame-side boss portion from being externally viewed by the cover portion, to further improve the appearance, and to provide a pillion by the contact surface between the cover portion and the rear frame outer surface. The weight per unit area acting from the step holder to the rear frame can be reduced.

  The present invention also includes a rear frame provided on the left and right of the rear portion of the vehicle body, and a pillion step holder fastened to the rear frame and extending rearward. The rear frame is integrally provided with a frame-side boss portion. In the rear structure of the saddle-ride type vehicle, the front portion of the pillion step holder has a through hole and is integrally provided with a holder side boss portion fastened by a bolt to the frame side boss portion. The side boss portion protrudes outwardly from the rear frame outer surface of the rear frame in the vehicle width direction, and a concave portion is provided on a contact surface with the holder side boss portion, and the bolt is fastened to the concave portion. A female screw is provided, and the through hole of the holder-side boss is provided so as to extend along at least a front-rear direction or a vertical direction of the vehicle. There characterized in that it is fastened from the vehicle longitudinal direction rear side or the vertical direction lower side. According to this configuration, the attachment / detachment operation can be easily performed while maintaining the appearance while reliably supporting the pillion step.

In the present invention, the frame-side boss portion provided in the rear frame is provided so as to protrude outward from the rear frame outer surface of the rear frame in the vehicle width direction, and the through-hole of the frame-side boss portion is at least a vehicle The holder-side boss provided on the pillion step holder is provided along the front-rear direction or the direction including the up-down direction, and a recess is provided on the contact surface with the frame-side boss, and a bolt is fastened to the recess. Since the female screw is provided and the bolt is fastened from the rear side in the vehicle front-rear direction or the lower side in the vertical direction, the attachment / detachment operation can be facilitated while maintaining the appearance while reliably supporting the pillion step.
Further, if the surface on the rear frame side of the holder-side boss is formed so as to abut on the outer surface of the rear frame, the holder-side boss can support the load acting in the vehicle width direction from the pillion step holder. And the rear surface of the rear frame can be shared and the strength and rigidity can be easily secured.
Further, a locking projection that protrudes inward in the vehicle width direction is integrally provided on a surface on the rear frame side of the holder-side boss portion, and a locking projection that locks the locking projection on the outer surface of the rear frame. If a recess is provided, parts other than the fastening bolt can share the load in the vertical direction, the fastening bolt can be reduced in diameter, and the frame-side boss and the holder-side boss can be reduced in size. It becomes.

Further, the holder-side boss portion is provided with a cover portion that covers the frame-side boss portion in a side view, and the upper and lower portions of the cover portion are extended until they contact the outer surface of the rear frame. The appearance can be further improved without making the boss look external, and the weight per unit area acting from the pillion step holder to the rear frame can be reduced by the contact surface between the cover and the rear frame outer surface. Can do.
The frame-side boss portion protrudes outward from the rear frame outer surface of the rear frame in the vehicle width direction, and a concave portion is provided on the contact surface with the holder-side boss portion, and a bolt is fastened to the concave portion. Since the through-hole of the holder-side boss is provided along at least the direction including the front-rear direction or the vertical direction of the vehicle, and the bolt is fastened from the rear side of the vehicle front-rear direction or the lower side of the vertical direction. The attachment / detachment operation can be facilitated while maintaining the appearance while reliably supporting the pillion step.

1 is a side view showing a motorcycle according to an embodiment of a saddle-ride type vehicle of the present invention. It is a side view which shows a pillion step attachment structure with a periphery structure. It is the figure which looked at the pillion step attachment structure from the vehicle body rear. It is IV-IV sectional drawing of FIG. It is VV sectional drawing of FIG. It is a side view which shows the pillion step attachment structure which concerns on 2nd Embodiment with a periphery structure. It is VII-VII sectional drawing of FIG. It is VIII-VIII sectional drawing of FIG. It is a side view which shows the pillion step attachment structure which concerns on 3rd Embodiment with a periphery structure. It is a side view which shows the pillion step attachment structure concerning 4th Embodiment with a periphery structure. It is XI-XI sectional drawing of FIG.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings. In the description, descriptions of directions such as front and rear, right and left and up and down are the same as directions with respect to the vehicle body unless otherwise specified.
<First Embodiment>
FIG. 1 is a side view showing a motorcycle according to an embodiment of a saddle-ride type vehicle of the present invention. The motorcycle 1 includes a body frame 2, a pair of left and right front forks 3 supported by a head pipe 20 of the body frame 2 so as to be steerable, and attached to the upper ends of the front forks 3 at the upper part of the front of the vehicle body. The steering handle 4 arranged, the front wheel 5 rotatably supported by the front fork 3, the engine (internal combustion engine) 6 supported by the vehicle body frame 2 at the approximate center of the vehicle body, and the vehicle body frame 2 up and down A swing arm (also referred to as a rear fork) 7 that is swingably supported, a rear wheel 8 that is rotatably supported at the rear end portion of the swing arm 7, and a fuel tank 9 that is disposed at the top of the vehicle body frame 2. And an occupant seat 10 disposed behind the fuel tank 9 and a vehicle body cowl (also referred to as cowling) 11 covering the vehicle body.
The motorcycle 1 is a two-seater vehicle in which passengers can appear in addition to the driver, and the passenger seat 10 is moved back and forth between a front seat 10A on which the driver is seated and a rear seat 10B on which the passenger is seated. Is formed as an integral sheet.

The vehicle body frame 2 includes a main frame 21 that supports the engine 6 and a rear frame (also referred to as a seat rail) 22 that supports a passenger seat.
The main frame 21 is formed by casting a metal material such as an aluminum alloy, and a pair of left and right main frame portions 23 branching from the head pipe 20 to the left and right and extending rearward and downward, and the main frame portions 23. And a pair of left and right pivot plate portions 24 that are connected to the rear of the first and extend downward. The left and right pivot plate portions 24 are rotatably supported at the front end portion of the swing arm 7, and a pair of left and right main steps 52 on which the driver's feet are placed are attached via a main step holder 51.

  The rear frame 22 is an integral cast-molded part made of a metal material such as an aluminum alloy, and is provided so as to extend rearwardly and rearwardly from the left and right sides of the rear upper portion of the main frame 21. The front upper portion of the rear frame 22 is fastened to the rear end portion of the main frame 21 with a bolt 53 extending in the left-right direction, and the front lower portion of the rear frame 22 is bolted along the front-rear direction to the rear end portion of the main frame 21 (not shown). ). A pair of left and right pillion steps 62 on which the passenger's feet are placed are attached to the rear frame 22 via pillion step holders 61.

The vehicle body cowl 11 is configured as a full cowling type that covers substantially the entire vehicle body, a front cowl 12 that covers the front of the vehicle body, and a pair of left and right side cowls 13 that are connected to the front cowl 12 and cover the left and right sides of the vehicle body. And a pair of left and right rear cowls 14 covering the rear of the vehicle body.
The front cowl 12 is provided in front of the head pipe 20 and the main frame 21, and a headlight 15, a wind screen 16, a pair of left and right rearview mirrors 17 and the like are attached to the front cowl 12.
The main frame 21 supports a V-type four-cylinder engine 6 so as to be positioned below the main frame portion 23 and in front of the pivot plate portion 24, and side cowls 13 are provided so as to cover both the left and right sides of the engine 6. It is done. The left and right side cowls 13 expose the rear lower part of the main frame 21 to the outside, and the main step holder 51 and a pair of left and right main steps 52 on which the driver's feet are placed are exposed to the outside.

  In the space surrounded by the engine 6, the fuel tank 9, and the left and right main frame portions 23, components (throttle body 25 and air cleaner 26) constituting the engine intake system are disposed. In addition, parts (intake pipe 27 and muffler not shown) constituting the engine exhaust system are arranged using the space around the engine except the upper part of the engine. In this way, the intake system and exhaust system of the engine 6 are laid out efficiently.

The rear cowls 14 are provided on both the left and right sides of the rear frame 22 and extend rearward from the front and rear intermediate portions of the rear frame 22 so as to cover the rear portion, and the rear ends thereof are connected to each other. At the rear of the rear cowl 14, a tail lamp 18 and a pair of left and right grab rails 19 held by the passenger are attached.
That is, the rear cowl 14 does not cover the rear frame front portion 22A and has a smaller area covering the side surface of the vehicle body as compared with the conventional case, so that the overall shape is reduced in size and weight. For this reason, in the motorcycle 1, the outer surface (rear frame outer surface) 22A1 of the rear frame front portion 22A in the vehicle width direction is exposed to the outside.
In the present embodiment, a pillion step holder 61 is attached as shown in FIG. 1 using the rear frame outer surface 22A1 exposed to this appearance.

FIG. 2 is a side view showing the pillion step mounting structure together with the peripheral configuration, and FIG. 3 is a view of the pillion step mounting structure as seen from the rear of the vehicle body (the direction III in FIG. 2). 4 is a cross-sectional view taken along the line IV-IV in FIG. 2, and FIG. 5 is a cross-sectional view taken along the line V-V in FIG. In FIG. 3, the left side is the outside in the vehicle width direction, and the right side is the inside in the vehicle width direction. Here, the left and right pillion step mounting structures in the vehicle 1 are bilaterally symmetric structures, and one (left side) pillion step mounting structure will be described below.
The rear frame front portion 22A is provided with a pair of frame-side boss portions 71 and 71 protruding outward in the vehicle width direction from the rear frame outer surface 22A1. These frame-side boss portions 71 and 71 have the same shape, and are integrally formed when the rear frame 22 is formed by casting or forging, and the number of parts is reduced while increasing the connection strength with the rear frame 22.

The frame-side boss portion 71 is formed in a bowl shape having a predetermined thickness in the longitudinal direction of the vehicle body, and the front surface (front surface) 71A and the rear surface (rear surface) 71B of the vehicle body are formed in a planar shape parallel to each other. In addition, a bolt insertion through hole (bolt insertion portion) 72 extending in the front-rear direction so as to penetrate the front surface 71A and the rear surface 71B is provided (see FIGS. 3 and 4).
As shown in FIG. 4, the through-hole 72 is formed with a shaft insertion hole 72A through which the shaft portion of the fastening bolt 81 passes when the fastening bolt 81 is inserted from the back surface 71B, and has a larger diameter than the shaft insertion hole 72A. A stepped hole including a bolt head insertion hole 72B in which the head of the fastening bolt 81 is received is formed.
Here, a hexagon socket head cap screw is used as the fastening bolt 81, and the hexagon socket head cap bolt does not need to secure a gap for inserting a tool around the head. It is formed to have the same diameter as the head diameter of 81. Although the pair of frame-side boss portions 71 are formed in the same shape, as shown in FIGS. 1 and 2, the pair of frame-side boss portions 71 are provided at intervals along the inclination of the rear frame 22. It is provided at intervals in the direction and the vertical direction, and avoids stress concentration due to the load from the pillion step holder 61.

The pillion step holder 61 is an integral cast-molded part made of a metal material such as an aluminum alloy, and is formed in a V shape in a side view.
That is, the pillion step holder 61 includes a pair of holder-side boss portions 63, 63 that are bolted to the pair of frame-side boss portions 71, 71, and a pair of stay portions 64A having the holder-side boss portions 63, 63, 64B and a stay support portion 65 that is connected to the stay portions 64A and 64B and supports the pillion step 62 in a collapsible manner.
The pair of stay portions 64A and 64B are connected to the front end of the stay support portion 65, branch into a fork toward the vehicle body front side, and extend in a straight line. The stay portions 64A and 64B extend in the direction in which the stay portions 64A and 64B extend. The holder-side boss portions 63 and 63 are integrally provided so as to extend, and have a V-shape in a side view in which a difference interval becomes narrower toward the rear of the vehicle body.

The holder-side boss portions 63, 63 have the same shape, and are formed in a column shape extending in the longitudinal direction of the vehicle body along the rear frame outer surface 22A1 of the rear frame front portion 22A. The diameter of the streamline is a tapered streamline shape, and the rear side of the tip is formed in the same cross-sectional shape as the frame-side boss 71 (so-called bullet shape) extending in the longitudinal direction of the vehicle body.
As shown in FIG. 4, the vehicle width direction inner surface (inner surface) 63A of the holder-side boss portion 63 is formed along a surface along the rear frame outer surface 22A1, and the rear surface (rear surface) 63B of the vehicle body is It is formed in a surface shape (planar shape) that comes into contact with the front surface 71 </ b> A of the frame-side boss portion 71.

Further, the holder-side boss portion 63 is provided with a hole portion 63C that functions as a recess that communicates with the shaft insertion hole 72A of the frame-side boss portion 71 when the back surface 63B is in contact with the front surface 71A of the frame-side boss portion 71. The hole 63C is formed in a female screw hole to which the fastening bolt 81 can be fastened.
For this reason, as shown in FIG. 4, the holder-side boss portion 63 is brought into contact with the front surface 71A of the frame-side boss portion 71 by bringing the back surface 63B of the holder-side boss portion 63 into contact with the hole portion 63C. And the frame-side boss portion 71 are fastened, and the pillion step holder 61 can be fixed to the rear frame 22.

  Here, the hole 63C does not penetrate the holder-side boss 63, that is, does not penetrate the front surface of the holder-side boss 63. In other words, the holder-side boss portion 63 is formed in a cap nut shape that does not allow the front end of the fastening bolt 81 to be seen in appearance. For this reason, the fastening bolt 81 is not viewed from the front or the side of the vehicle body, and the rigidity of the holder-side boss portion 63 can be increased as compared with the case where the through-hole is formed. Is possible.

  As shown in FIGS. 4 and 5, an inner surface 63A of the holder-side boss 63 is integrally provided with a locking projection 63D that protrudes inward in the vehicle width direction. It fits into a locking recess 22H provided on the rear frame outer surface 22A1 of the frame front portion 22A. The locking projection 63D has a rectangular rectangular cross section extending along the vehicle body front-rear direction (the axial direction of the fastening bolt 81), and the locking projection 63D fits into the locking recess 22H. The support strength of 61 can be improved, and the holder-side boss portion 63 can be accurately positioned on the rear frame front portion 22A.

  As described above, in this configuration, the holder-side boss 63 of the pillion step holder 61 is provided with the hole 63C that is opened only in the rear, and the hole 63C is formed on the outer side in the vehicle width direction from the rear frame outer surface 22A1 of the rear frame front portion 22A. Since the fastening bolt 81 inserted from the rear side of the vehicle body (rear side in the vehicle front-rear direction) is fastened to the frame-side boss portion 71 projecting to the rear side, the bolt tip is externally seen while the pillion step holder 61 is securely supported by the rear frame 22. It is possible to make the fastening bolt 81 difficult to see by making it invisible. Further, since the fastening bolt 81 is provided outside the rear frame 22 in the vehicle width direction, the bolt 81 can be easily attached and detached as compared with the case where the fastening bolt 81 is provided inside the rear frame 22 in the vehicle width direction. The attachment / detachment work of the holder 61 can be facilitated.

  In addition, in this configuration, since the bolt head insertion hole 72B in which the head of the fastening bolt 81 is received is provided in the bolt fastening through hole 72 formed in the frame side boss portion 71, the head of the fastening bolt 81 is It completely enters the frame side boss portion 71, and the fastening bolt 81 can be made invisible from the side of the vehicle body. For this reason, the fastening bolt 81 is externally seen only from the rear side necessary for attaching and detaching the fastening bolt 81, and is externally seen from other directions (vehicle body side, vehicle body front, vehicle body vertical direction). Therefore, the appearance around the pillion step 62 can be improved.

Further, in this configuration, the rear frame 22 side surface (inner surface) 63A of the holder side boss portion 63 abuts along the rear frame outer surface 22A1 of the rear frame front portion 22A. Can be shared by the contact surface between the holder-side boss portion 63 and the rear frame outer surface 22A1, and the holder-side boss portion 63 can be shared. As compared with the case where the load in the vehicle width direction is supported only by the fastening bolts 81 that fasten the frame-side boss portion 71, the strength and rigidity can be easily ensured.
Here, the load acting in the vehicle width direction from the pillion step holder 61 is such that when the passenger applies a downward force by, for example, stepping on a foot on the pillion step 62, the pillion step holder 61 is attached to the shaft of the fastening bolt 81 It is a large load that acts as a rotational moment force that rotates around. Since this large load can be supported over a wide area, the load per unit area can be reduced, the frame-side boss portion 71 and the holder-side boss portion 63 can be downsized and the fastening bolt 81 can have a small diameter while ensuring strength and rigidity. Can be realized.

  In addition, in this configuration, a locking projection 63D that protrudes inward in the vehicle width direction is integrally provided on the surface (inner surface) 63A on the rear frame 22 side of the holder-side boss portion 63, and the rear frame outer surface 22A1 Is provided with a locking recess 22H that locks with the locking protrusion 63D, and this locking structure allows parts other than the fastening bolt 81 to share the support of the load in the vertical direction, and the rotational moment. It can also share the support of power. In this case, since the locking projection 63D has a square cross section, it is possible to efficiently widen the surface that receives the load and the rotational moment force in the vertical direction as compared with a case where the cross section has another cross section such as a semicircular cross section. The fastening bolt 81 can be reduced in diameter, and the frame-side boss portion 71 and the holder-side boss portion 63 can be reduced in size.

  Further, in this configuration, as shown in FIG. 4, the locking projection 63 </ b> D is on the front end 63 </ b> F side that is the opposite end of the frame-side boss 71 in the holder-side boss 63, and its front end 63 </ b> F. It is provided at a position closer to the frame-side boss 71 than the distance LD (position closer to the back surface 63B). For this reason, the position which receives the load and the rotational moment force in the vertical direction together with the fastening bolt 81 can be secured at a position away from the fastening bolt 81 in the front-rear direction, the support strength can be easily secured, and the locking projection 63D can be secured at the front end Even if there is a gap between the locking projection 63D and the locking recess 22H due to a manufacturing error or the like, the gap is not visually seen and the appearance is better than when it is provided at the limit of the portion 63F. Can be.

Second Embodiment
6 is a side view showing the pillion step mounting structure according to the second embodiment together with the peripheral configuration, FIG. 7 is a sectional view taken along line VII-VII in FIG. 6, and FIG. 8 is a sectional view taken along line VIII-VIII in FIG. FIG.
In the second embodiment, the holder-side boss portion 63 provided in the pillion step 61 includes a cover portion 63G that covers the frame-side boss portion 71 provided in the rear frame 22 from the outside in the vehicle width direction.
When the holder-side boss portion 63 and the frame-side boss portion 71 are bolted, the cover portion 63G is vertically moved in an arc along the outer surface between the front surface 71A and the back surface 71B of the frame-side boss portion 71. The upper extending end surface 71G1 is in contact with the upper position of the frame side boss portion 71 in the rear frame 22, and the lower extending end surface 71G2 is in contact with the lower position of the frame side boss portion 71 in the rear frame 22. Formed.
Further, the front portion of the holder-side boss portion 63 to which the cover portion 63G is connected extends in the front direction of the vehicle body so as to be connected to the front and rear of the outer peripheral surface of the cover portion 63G, and then gradually decreases toward the vehicle body front side. It is formed in a line shape and has a shape in which no step is formed between the cover portion 63G.

  Thus, the holder-side boss portion 63 is provided with a cover portion 63G that covers the frame-side boss portion 71 in a side view, and the upper and lower portions of the cover portion 63G are extended until they contact the rear frame outer surface 22A1. In addition to the various effects of the first embodiment, the frame-side boss portion 71 can be prevented from being viewed from the front or the side of the vehicle body, and the appearance can be further improved. Further, the support of the load acting from the pillion step holder 61 can also be shared by the contact surface between the cover portion 63G and the rear frame outer surface 22A1, and the unit area acting from the pillion step holder 61 to the rear frame 22 can be reduced. Can be further reduced.

<Third Embodiment>
FIG. 9 is a side view showing the pillion step mounting structure according to the third embodiment together with the peripheral configuration. In this embodiment, the fastening bolt 81 is detachably formed from below the frame side boss portion 71.
More specifically, the frame-side boss portion 71 provided on the rear frame 22 has a shape that protrudes outward from the rear frame 22 in the vehicle width direction, and is formed in a bowl shape having a predetermined thickness in the vehicle body vertical direction. The upper surface (upper surface) 71E and the rear surface (lower surface) 71F of the vehicle body are formed in a plane shape parallel to each other, and the bolt insertion penetration extends in the vertical direction so as to penetrate the upper surface 71E and the lower surface 71F. A hole (bolt insertion portion) 72 is provided.
The holder-side boss portion 63 provided in the pillion step 61 is formed in a shape extending upward from the front end portions of the stay portions 64A and 64B of the pillion step holder 61 in a side view, and the upper surface 71E of the frame-side boss portion 71. Are provided with a female threaded hole 63C functioning as a recess recessed upward, and a cover 63G that covers the frame-side boss 71 from the vehicle width direction outside.
Therefore, the holder-side boss 63 and the frame-side boss 63 are brought into contact with the frame-side boss 71 as shown in FIG. 9 and the fastening bolt 81 is fastened to the hole 63C from below. The part 71 can be fastened and the pillion step holder 61 can be fixed to the rear frame 22.

  According to this configuration, the hole 63C that opens only downward is provided in the holder-side boss 63 of the pillion step holder 61, and the hole 63C extends outward from the rear frame outer surface 22A1 of the rear frame front portion 22A in the vehicle width direction. Since the fastening bolt 81 inserted from below the vehicle body (the vehicle vertical direction lower side) is fastened to the protruding frame-side boss portion 71, the fastening bolt 81 is attached to the vehicle body while the pillion step holder 61 is securely bolted to the rear frame 22. It can be made visible only from below. Therefore, also in the present embodiment, various effects of the first embodiment such as being able to easily attach and detach while maintaining the appearance while reliably supporting the pillion step 62, and the provision of the covering portion 63G. Various effects similar to those of the second embodiment can be provided.

<Fourth embodiment>
10 is a side view showing the pillion step mounting structure according to the fourth embodiment together with the peripheral configuration, and FIG. 11 is a cross-sectional view taken along the line XI-XI in FIG. In this embodiment, the frame-side boss portion 71 is provided with a hole portion 71C that opens only to the rear, and the hole-side 71C has a holder-side boss portion 63 provided at the front portion of the pillion step holder 61 at the vehicle body rear side (vehicle longitudinal direction). The fastening bolt 81 inserted from the rear side is fastened.
Specifically, the holder-side boss portion 63 is formed in a bowl shape having a predetermined thickness in the longitudinal direction of the vehicle body, and the front surface (front surface) 63J and the rear surface (rear surface) 63K of the vehicle body are parallel to each other. A bolt insertion through hole (bolt insertion portion) 66 is provided which is formed in a planar shape and extends in the front-rear direction so as to penetrate the front surface 63J and the rear surface 63K.
The through hole 66 is formed with a shaft insertion hole 66A through which a shaft portion of the fastening bolt 81 passes when the fastening bolt 81 is inserted from the back surface 63K, and a head of the fastening bolt 81 having a larger diameter than the shaft insertion hole 66A. It is formed in a stepped hole including a bolt head insertion hole 66B that fits.

On the other hand, the frame-side boss portion 71 is formed in a columnar shape extending in the longitudinal direction of the vehicle body along the rear frame outer surface 22A1 of the rear frame front portion 22A, and has a tapered shape that gradually increases in diameter as the tip portion goes rearward. The streamline shape is formed in a shape (so-called bullet shape) that extends in the longitudinal direction of the vehicle body in the same cross-sectional shape as the frame-side boss portion 71 from the front end portion.
The frame-side boss portion 71 is provided with a hole portion 71C that functions as a recess communicating with the shaft insertion hole 66A of the holder-side boss portion 63 when the back surface 71B is brought into contact with the front surface 63J of the holder-side boss portion 63. The hole portion 71 </ b> C is formed in a cap nut-shaped female screw hole to which the fastening bolt 81 can be fastened.

In this configuration, the holder-side boss portion 63 and the frame-side boss portion are brought into contact with the rear surface 71B of the frame-side boss portion 71 by bringing the front surface 63J of the holder-side boss portion 63 into contact with the fastening bolt 81 in the hole portion 71C. 71 is fastened, and the pillion step holder 61 can be fixed to the rear frame 22. Therefore, it is possible to make the fastening bolt 81 difficult to externally view while securely supporting the pillion step holder 61 to the rear frame 22 with the bolt.
As described above, when the holder side boss part 63 at the front part of the step holder 61 is brought into contact with the back surface 71B of the frame side boss part 71, the holder side boss part 63 is arranged on the front side of the frame side boss part 71. In comparison, since the holder-side boss portion 63 can be disposed closer to the rear of the vehicle body (closer to the pillion step 62), the stay portions 64A and 64B of the step holder 61 can be shortened.
In the present embodiment, the case where the fastening bolt 81 is fastened from the rear side in the vehicle front-rear direction has been described. However, as in the third embodiment, the fastening bolt 81 is fastened from the lower side in the vehicle vertical direction. It is also possible to do.

The above-described embodiment is merely an aspect of the present invention, and can be arbitrarily modified and applied without departing from the gist of the present invention. For example, in the above embodiment, the through-hole 72 provided in the frame-side boss 71 and the hole 63C provided in the holder-side boss 63 are provided along the front-rear direction or the vertical direction, and the fastening bolt 81 is provided in the front-rear direction or the vertical direction. Although the case where it fastens to the direction was demonstrated, it is not restricted to this, For example, you may make it fasten from the diagonally downward direction of the fastening bolt 81 vehicle body diagonally upward. That is, by forming the through hole 72 and the hole 63C so as to fasten the fastening bolt 81 so as to include at least the front-rear direction or the vertical direction, it is difficult to make the fastening bolt 81 difficult to see in the side view of the vehicle body. Is possible.
In the above embodiment, the case where the present invention is applied to the rear structure of the motorcycle shown in FIG. 1 has been described. However, the present invention is not limited to this, and the present invention can be widely applied to saddle riding type vehicles. The saddle-ride type vehicle includes all vehicles that ride on the vehicle body, and includes not only motorcycles (including bicycles with motors) but also three-wheeled vehicles and four-wheeled vehicles classified as ATVs (rough terrain vehicles). It is a vehicle including.

DESCRIPTION OF SYMBOLS 1 Motorcycle 2 Body frame 11 Body cowl 21 Main frame 22 Rear frame 22A Rear frame front part 22A1 Rear frame outer surface 22H Locking recessed part 61 Pillion step holder 62 Pillion step 63 Holder side boss part 63C, 71C Hole (recessed part)
63D Locking protrusion 63G Cover part 66, 72 Through hole (bolt insertion part)
71 Frame side boss 81 Fastening bolt

Claims (5)

A rear frame provided on the left and right of the rear part of the vehicle body, and a pillion step holder fastened to the rear frame and extending rearward, and the rear frame is integrally provided with a frame side boss portion having a through hole; In the rear structure of the saddle-ride type vehicle in which a holder side boss part fastened by a bolt to the frame side boss part is integrally provided at the front part of the pillion step holder,
The frame-side boss portion is provided so as to protrude outward from a rear frame outer surface on the vehicle width direction outer side of the rear frame, and the through hole extends at least in a direction including a front-rear direction or a vertical direction of the vehicle. The holder-side boss portion is provided with a recess in a contact surface with the frame-side boss portion, and a female screw to which the bolt is fastened is provided in the recess. Alternatively, the rear structure of the saddle-ride type vehicle, which is fastened from the lower side in the vertical direction.   2. The rear structure of the saddle-ride type vehicle according to claim 1, wherein a surface on the rear frame side of the holder-side boss is formed so as to abut along an outer surface of the rear frame. On the surface on the rear frame side of the holder-side boss portion, a locking projection that protrudes inward in the vehicle width direction is integrally provided,
The rear structure of the saddle-ride type vehicle according to claim 2, wherein a locking recess for locking with the locking protrusion is provided on the outer surface of the rear frame.   The holder-side boss portion is provided with a cover portion that covers the frame-side boss portion in a side view, and the upper and lower portions of the cover portion extend until they contact the outer surface of the rear frame. Item 4. A rear structure of a saddle-ride type vehicle according to any one of Items 1 to 3. A rear frame provided on the left and right of the rear portion of the vehicle body; and a pillion step holder fastened to the rear frame and extending rearward. The pear step holder includes a frame-side boss portion provided integrally with the rear frame. In the rear structure of the saddle-ride type vehicle having a through hole and a holder side boss part fastened by a bolt to the frame side boss part,
The frame-side boss portion protrudes outward from a rear frame outer surface on the vehicle width direction outer side of the rear frame, and a recess is provided on a contact surface with the holder-side boss portion, and the bolt is provided in the recess. A female screw to be fastened is provided,
The through-hole of the holder-side boss part is provided so as to extend along at least a direction including the front-rear direction or the vertical direction of the vehicle, and the bolt is fastened from the rear side of the vehicle front-rear direction or the lower side of the vertical direction. The rear structure of a saddle-ride type vehicle.

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