JPH11198877A - Back rest for motorcycle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To allow simply mounting a cover for a back rest while bolt(s) for fixing the cover is made in conspicuous. SOLUTION: A back rest for a motorcycle is composed of a stay 25 fixed to the tail of a body frame, a back rest body 26 fixed to the body front side of the stay 25, and a cover 27 covering the back rest body 26 from behind. The cover 27 is equipment in the upper part with an abutting plate 38 locked by the top of the stay 25 from behind, and a projection 39 confronting the rear surface of the back rest body 26. The bottom of the cover 27 is secured to a supporting plate 32 for the stay 25.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a backrest for a motorcycle, and more particularly to a mounting structure of a cover for covering a back surface of a backrest body having a shock absorber.

[0002]

2. Description of the Related Art Conventionally, a motorcycle equipped with a backrest has a structure in which a backrest body provided with a shock absorber is attached to a rear end portion of a vehicle body frame via a stay. The stay is formed in a gate shape when viewed from the front side of the vehicle body, and the backrest body is attached to an upper portion of the stay on the front side of the vehicle body.
The backrest has a cover attached to the body of the backrest body or the stay, and a bolt for attaching the backrest body to the stay is covered by the cover.

[0003]

However, the motorcycle backrest constructed as described above has a problem with the mounting structure of the cover. This is because the bolts for attaching the cover to the stay or the backrest body must be made invisible. In other words, if the cover fixing bolts are placed in places that are difficult to see, the workability when assembling the cover will deteriorate, but if the number of bolts is reduced so that the appearance is not impaired, the force to support the cover will increase. Because it becomes weak.

The present invention has been made to solve such a problem, and an object of the present invention is to make it possible to easily attach a cover while making it difficult to see a cover fixing bolt.

[0005]

A backrest for a motorcycle according to the present invention is fixed to a front side of the stay by a stay having a gate-like shape projecting from a rear end of a body frame and a fixing bolt inside the stay. A backrest body, a cover that covers the backrest body from the rear of the vehicle body inside the stay, and a first positioning piece that is locked from the rear side to an upper end portion of the stay on an upper portion of the cover; A second positioning piece is provided in contact with the back surface, and the lower portion of the cover is fixed to a stay.

According to the present invention, the upper portion of the cover is prevented from moving rearward by the first positioning piece being locked to the stay, and the second positioning piece is brought into contact with the backrest body. This prevents the vehicle body from moving forward. Therefore, the cover can be firmly attached to the stay even with a structure in which only the lower portion of the cover is fixed to the stay.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of a motorcycle backrest according to the present invention will be described below in detail with reference to FIGS. FIG. 1 is a side view of a motorcycle equipped with a backrest according to the present invention, FIG. 2 is a side view of a body frame, FIG. 3 is a rear view of the backrest according to the present invention, and FIG. It is drawn in. FIG. 4 corresponds to FIG.
FIG. 5 is a side view of the lower stay on the left side of the vehicle body, and FIG. 6 is a rear view of the lower stay on the left side of the vehicle body.

FIG. 7 is a rear view of the upper stay, FIG. 8 is a sectional view taken along the line VIII-VIII in FIG. 7, and FIG.
It is a line sectional view. FIG. 10 is a rear view of the backrest body, FIG.
1 is a sectional view taken along line XI-XI in FIG. 10, and FIG. 12 is a sectional view taken along line XII-XII in FIG. 13 is a rear view of the cover, FIG. 14 is a side view of the cover, and FIG.
It is XV-XV line sectional drawing.

In these figures, the reference numeral 1 denotes a motorcycle according to this embodiment. This motorcycle 1 is equipped with a backrest 3 according to the present invention behind a seat 2. In FIG. 1, reference numeral 4 denotes a front wheel, 5 denotes a front fork, 6 denotes a steering handle, 7 denotes a fuel tank,
Reference numeral 8 denotes an engine, and 9 denotes a rear wheel.

The seat 2 is formed so that a passenger's seat is higher than a driver's seat, and is supported by a body frame indicated by reference numeral 10 in FIG. The body frame 10 includes a head pipe 11, a main pipe 12 extending downward from the head pipe 11, a down tube 13 extending downward from the head pipe 11 forward of the vehicle body from the engine 8,
2, a rear arm bracket 14 welded to the lower end of the vehicle 2, a seat rail 15 extending rearward from the vehicle body from a point in the main pipe 12, and a back stay 16 connecting the point in the seat rail 15 to the rear arm bracket 14.
And so on. The seat 2 and the backrest 3 are supported by the seat rail 15. Reference numeral 17 connecting the middle of the back stay 16 and the rear arm bracket 14 is a footrest stay for mounting a footrest 18 (see FIG. 1) for a passenger.

The head pipe 11 and the main pipe 12
The down tube 13 and the down tube 13 are each formed by a single tubular body, and the rear arm bracket 14, the seat rail 15 and the back stay 16 are formed so as to form a pair in the vehicle width direction. The front fork 5 is rotatably supported by the head pipe 11, and the engine 8 is mounted on the down tube 13 and the rear arm bracket 14.

A rear arm indicated by reference numeral 19 in FIG. 1 is swingably supported on the rear arm bracket 14 via a pivot shaft (not shown). The rear wheel 9 is rotatably supported by the rear end of the rear arm 19. A rear cushion unit 21 is interposed between the rear arm 19 and a rear reinforcing member 20 (see FIG. 2) of the body frame 10.

The seat rail 15 of the vehicle body frame 10 has three cross members 22 to 24 each having a gate-shaped cross section for supporting the seat 2. Of these cross members, the third cross member 2 located at the rearmost side of the vehicle body
4 supports the backrest 3.

The backrest 3 includes a stay 25 fixed to both sides of the third cross member 24 (see FIG. 1), a backrest body 26 fixed to the stay 25 and a cover 2.
7 (see FIGS. 3 and 4).

The stay 25 is a lower stay 28 formed to form a pair in the vehicle width direction (see FIGS. 5 and 6).
And an upper stay 29 formed in a downward U-shape as shown in FIG. 7, and a lower end of the lower stay 28 is fixed to the third cross member 24 by a bolt (not shown). By connecting the lower end of the upper stay 29 to the upper end of the stay 28 with a connecting bolt 30 (see FIG. 1), the upper stay 29 is formed in a front view gate shape projecting upward from the vehicle body frame 10.

The lower stay 28 is formed in a plate shape, and the upper stay 29 is formed by bending a bar having a rectangular cross section to form a pair of vertically extending portions 29a extending vertically. The vehicle width direction extending portion 29b connecting the upper ends of the vertical direction extending portions 29a to each other is integrally formed. The attachment of the upper stay 29 to the lower stay 28
The lower stay 28 is sandwiched between a pair of lower stays 28, and the connecting bolt 30 is passed through both the upper and lower stays 28, 29. A bolt hole for inserting the connecting bolt 30 in the lower stay 28 is indicated by reference numeral 28a in FIGS. 5 and 6, and a bolt hole of the upper stay 29 is indicated by reference numeral 29c in FIGS. 7 and 9. A circle 28b drawn below the lower stay 28 in FIGS. 5 and 6 is a bolt hole for inserting a bolt for fixing the lower stay 28 to the third cross member 24.

As shown in FIG. 7, the upper stay 29 has a backrest mounting bracket 31 welded to the inside of a pair of vertically extending portions 29a.
A support plate 3 for attaching a cover is provided in the middle of the vertically extending portion 29a.
2 are welded. The support plate 32 is bridged between a pair of vertically extending portions 29a. As shown in FIGS. 8 and 9, a screw hole 32a is formed at the center in the vehicle width direction, and a nut 32b is formed. Is welding.

The backrest body 26 is shown in FIGS.
As shown in FIGS. 0 to 12, a structure is adopted in which a buffer 34 is provided on the front side of the vehicle body of a back plate 33 made of synthetic resin. The rear plate 33 has two fixing bolts 35 erected by insert molding so as to protrude rearward of the vehicle body, and a projection projecting rearward of the vehicle body between these bolts 35. 36 are provided. These projections 36, 36 are formed integrally with other portions of the back plate 33 during molding so that a flat surface 36a is formed at the protruding end.
A through hole 36b is formed in the center.

The back plate 33 has an outer edge 33.
a is formed so as to protrude rearward of the vehicle body, and the buffer 34 is provided so as to cover the edge 33a from outside. As shown in FIG. 3, the rear plate 33 is formed such that the edges 33a located on the upper side and both sides in the vehicle width direction overlap the upper stay 29 when viewed from the rear of the vehicle body.

As shown in FIG. 4, the mounting of the backrest main body 26 to the upper stay 29 is performed by passing the fixing bolt 35 through the bracket 31 of the upper stay 29, and
Is carried out by tightening. In this embodiment, the back body 26 is connected to the upper stay 29 as described above.
The portion of the backrest body 26 corresponding to the edge 33a of the back plate 33 is pressed against the upper stay 29 from the front side of the vehicle body.

The cover 27 is formed of a synthetic resin, and as shown in FIGS.
, Two protrusions 39 below the contact plate 38, an upper concave portion 40 and a lower concave portion 41, and a lower end mounting plate 42.
Are molded at the time of molding. The contact plate 38 forms a first positioning piece according to the present invention, and the two protrusions 39 form a second positioning piece according to the present invention.

The contact plate 38 is formed so as to protrude upward at the front side of the body of the cover 27 and extend in the vehicle width direction. The protrusion 39 is projected forward of the vehicle body, and the tip portion is formed so as to be thinner with a step relative to other portions, thereby engaging with the through hole 36 b of the protrusion 36 of the backrest body 26. A mating element 43 and a flat surface 44 that faces the front of the vehicle body around the engaging element 43 are formed.

The upper concave portion 40 has an emblem indicated by reference numeral 45 in FIG. 4, and the lower concave portion 41 has a reflector indicated by reference numeral 46 in FIG.

The mounting plate 42 is for fixing the cover 27 to the support plate 32 of the upper stay 29. The mounting plate 42 protrudes forward of the vehicle body and has one end in the vehicle width direction of the cover 27 and the other end. Up to the vehicle width direction. Further, a through hole 42a for inserting a fixing bolt 47 (see FIGS. 3 and 4) for fixing the cover 27 to the support plate 32 is formed in the center of the mounting plate 42 in the vehicle width direction. I have.

The contact plate 38, the projection 39 and the mounting plate 4
4, the mounting plate 42 is placed on the support plate 32 of the upper stay 29 from below, as shown in FIG.
The rear surface of the contact plate 38 is the horizontal extension 29b of the upper stay 29.
Abuts on the lower side of the front surface of the backrest body 26 at a position where the backrest body 26 abuts, and the engaging element 43 of the projection 39 fits into the through hole 36b of the backrest body 26, and the flat surface 44 abuts on the projection 36 of the backrest body 26. Is set as follows.

In order to assemble the backrest 3 configured as described above to the vehicle body frame 10, first, the lower stay 2
8 is attached to the third cross member 24 of the body frame 10. On the other hand, the backrest body 26 and the cover 27 are assembled in this order to the upper stay 29 to form an assembly having the backrest body. Then, the upper stay 29 of this assembly is attached to the lower stay 28. In this way, the backrest 3
Can be assembled to the body frame 10.

When attaching the backrest body 26 to the upper stay 29, a fixing bolt 35 is inserted into the bracket 31 from the front side of the vehicle body, and a nut 37 is fastened to the bolt 35 from the rear side of the vehicle body. Attach cover 27 to upper stay 29
First, the upper end of the cover 27 is inserted into the inside of the gate-shaped upper stay 29, and the contact plate 38 at the upper end is inserted.
The cover 27 is erected clockwise in FIG. 4 so that the cover 27 wraps forward from the front lower side of the horizontally extending portion 29b of the upper stay 29. By this erecting operation, the engaging element 43 of the projection 39 of the cover 27 is fitted into the through hole 36b of the protrusion 36 of the backrest body 26 from below. The through hole 36b of the projection 36 is formed so that the entrance side (rear side of the vehicle body) of the engagement element 43 is widened downward so that the engagement element 43 can be easily fitted by the upright operation. doing.

After the erecting operation is performed until the mounting plate 42 at the lower end of the cover 27 overlaps the support plate 32 of the upper stay 29 from below, the fixing bolt 47 is inserted through the through hole 42a of the mounting plate 42 from below. The nut 32 of the support plate 32
b.

By tightening the fixing bolts 47 in this manner, the contact plate 38 at the upper end of the cover is locked to the upper stay 29 from the rear side, and the projection 39 of the cover 27 becomes the projection 36 of the back body 26. To face.

In the above-described assembled state, the upper portion of the cover 27 is prevented from moving rearward by the abutment plate 38 being locked to the upper stay 29 from the rear side.
Abuts on the protrusion 36 of the backrest main body 26 to prevent the vehicle body from moving forward.

Therefore, even in a structure in which only the lower end of the cover 27 is fixed to the upper stay 29, the cover 27 can be firmly attached to the upper stay 29. As a result, the single cover fixing bolt 47 can be made as inconspicuous as possible, and the work of attaching the cover 27 can be easily performed. In this embodiment, the upper stay 29 is inclined upward and rearward as shown in FIGS. 1 and 4 so that the lower surface of the support plate 32 is directed obliquely forward and downward. The cover fixing bolt 47 is hidden by the mounting plate 42 when the cover is in contact. Therefore, by adopting this embodiment,
The cover fixing bolt 47 can be made less noticeable.

[0032]

As described above, according to the present invention, the upper portion of the cover is prevented from moving rearward by the first positioning piece being locked to the stay, and the second positioning piece is locked. By contacting the backrest body, the forward movement of the vehicle body is prevented, so that the cover can be firmly attached to the stay even when only the lower portion of the cover is fixed to the stay.

Therefore, the motorcycle backrest according to the present invention can reduce the number of cover fixing bolts so as to be as inconspicuous as possible,
Since the work of attaching the cover can be easily performed,
It is possible to achieve both improvement of the appearance and improvement of the workability of the mounting work.

[Brief description of the drawings]

FIG. 1 is a side view of a motorcycle equipped with a backrest according to the present invention.

FIG. 2 is a side view of a vehicle body frame.

FIG. 3 is a rear view of the backrest according to the present invention.

FIG. 4 is a sectional view taken along line IV-IV in FIG.

FIG. 5 is a side view of a lower stay on the left side of the vehicle body.

FIG. 6 is a rear view of the lower stay on the left side of the vehicle body.

FIG. 7 is a rear view of the upper stay.

8 is a sectional view taken along line VIII-VIII in FIG. 7;

9 is a sectional view taken along line IX-IX in FIG.

FIG. 10 is a rear view of the backrest body.

11 is a sectional view taken along line XI-XI in FIG.

12 is a sectional view taken along line XII-XII in FIG.

FIG. 13 is a rear view of the cover.

FIG. 14 is a side view of the cover.

15 is a sectional view taken along line XV-XV in FIG.

[Explanation of symbols]

3 Backrest, 25 Stay, 26 Backrest body, 2
7 ... cover, 28 ... lower stay, 29 ... upper stay, 3
2 ... Support plate, 36 ... Protrusion, 38 ... Contact plate, 39 ... Protrusion.

Claims (1)

[Claims] 1. A front-view gate-shaped stay protruding upward from a rear end portion of a body frame, a backrest body fixed to a vehicle body front side of the stay by a fixing bolt located inside the stay, A cover that covers the backrest body from the rear of the vehicle body inside the stay, and a first positioning piece that is locked from the rear side to an upper end of the stay and is provided on an upper portion of the cover; A backrest for a motorcycle, wherein a second positioning piece is provided in contact with the back surface of the vehicle, and a lower portion of the cover is fixed to the stay.