JPH04339087A - Scooter type motorcycle - Google Patents

Abstract

PURPOSE:To support a step board perfectly/firmly even if this step board is formed of synthetic resin by supporting the right/left both side parts of the step board with brackets projecting sideways more than a frame member. CONSTITUTION:A gazette 26 to receive the front part of a step board 23 is installed in the front edge part of a main frame member 8. Furthermore, a support stay 27 projecting respectively sideways is installed in the lower edge part of a rear rise part 12 of the main frame member 8. The support stay 27 is bent upward, and a pair of long/narrow right/left brackets 28 are installed between this support stay 27 and the right/left both edge parts of the gazette 26. The right/left both edge parts of the step board 23 having width wider than an installation space of the main frame member 8 are supported with these brackets 28. Thereby, even if the step board 23 is formed of synthetic resin, the right/left both side parts, on which a driver is apt to lay his or her feet very frequently, can be supported perfectly/firmly.

Description

[Detailed description of the invention]

0001

[Industrial Application Field] The present invention relates to a scooter-type motorcycle in which the frame is recessed downward between the front fork and the seat, and a step board for resting the driver's feet is installed at the bottom of this recess. In particular, the present invention relates to the mounting structure of the step board.

0002

[Prior Art] Scooter-type motorcycles have a frame that has a large concave downward between the front fork and the seat so that the rider can easily get on and off the vehicle. A step board has been installed. For this reason, frames for this type of motorcycle include a single down tube that extends downward from the head pipe that supports the front fork, and a down tube that extends rearward from the lower end of the down tube and is spaced apart in the left and right direction. It is equipped with a pair of main frame members,
A step board is installed on the upper surface of these main frame members. Since this step board is for the driver to rest his or her feet on, it requires a certain degree of rigidity, and in conventional motorcycles, the entire step board is made of sheet metal material.

[0003] Furthermore, the main frame member that supports the step board is raised at the rear of the step board, and an engine unit that integrates the engine and the rear wheels is connected to this raised portion. The seat is arranged above the engine unit, and the periphery of the engine unit and the rising portion of the main frame member is covered with a cover that extends to the rear end of the step board.

0004

[Problems to be Solved by the Invention] Incidentally, in order to secure a space for footrest, the step board is set to have a horizontal width wider than the interval between the main frame members, and its planar shape is relatively large. ing. For this reason, if the entire step board is made of sheet metal, the step board becomes heavy, resulting in an increase in the weight of the motorcycle.

As a countermeasure to this problem, it has been considered to construct the step board from a lightweight synthetic resin material. However, if the step board is made of synthetic resin, it will lack surface rigidity compared to one made of sheet metal.
In particular, it is necessary to firmly support the left and right sides of the step board, on which the driver frequently places his or her feet, over the entire length.

[0006] Then, since the step board is wider than the left and right main frame members as described above, it becomes necessary to widen the interval between the main frame members on the left and right sides. As the spacing between the main frame members increases, the spacing between the rising portions of the main frame members also widens from side to side, so that the width of the front portion of the cover that covers the lower part of the seat increases. For this reason, there is a problem that the front part of the cover may protrude above the step board, and the space for placing the feet on the step board is reduced accordingly.

The present invention has been made based on the above circumstances, and can reliably support both left and right sides of the step board, which is convenient when the step board is made of synthetic resin, and To provide a scooter type two-wheeled motor vehicle which can secure a wide footrest space on the step board and in which the shape and size of the step board are not restricted by frame members.

[0008]

[Means for Solving the Problems] Therefore, in the present invention, the frame member is recessed downward between the front fork and the seat, and a step board for resting the driver's feet is provided at the bottom of this recess. Equipped with an installed frame,
The frame member of this frame has a front rising portion and a rear rising portion extending upward on both front and rear sides sandwiching the step board, and at least the portion extending rearward from the bottom of the step board is spaced apart in the left-right direction. The unit swing-type engine unit, in which the engine and rear wheels are integrated, is mounted on the rear rising part located at the rear of the step board, vertically extending In a scooter-type motorcycle that is swingably connected and has a cover surrounding the engine unit and the rear rising portion,

0
A pair of left and right pipe materials constituting the frame member are connected to each other via a cross member in the vicinity of the lower end of the rear rising portion, and the above-mentioned A pair of left and right brackets are provided that connect the vicinity of the lower end of the rear rising portion and the vicinity of the lower end of the front rising portion and extend in the front-rear direction, and the left and right sides of the step board are placed on these brackets. It is characterized by what it did.

0010

[Function] According to this configuration, the left and right sides of the step board can be supported by the brackets extending laterally from the frame members, and even if the step board is made of synthetic resin, it can be reliably and firmly supported. can be supported.

Furthermore, in supporting the left and right sides of the step board, there is no need to widen the spacing between the pipe materials that make up the frame member, so the spacing between the rear rising portions of these pipe materials does not widen. It's over. Therefore, the size of the cover surrounding the rear rising portion does not increase, and the cover can be prevented from protruding over the step board.

At the same time, since the vicinity of the lower end of the front rising portion of the frame member and the vicinity of the lower end of the rear rising portion are connected via the bracket, this bracket functions to reinforce the frame member. , the rigidity of this frame member is improved. Therefore, compared to the case without brackets, the frame member can be made thinner, and the installation space for the step board can be expanded accordingly.In addition to preventing the cover from protruding, it is possible to You can secure a wide space for your feet.

In addition, since the bracket is a separate component independent of the frame member, its length in the longitudinal direction can be freely set regardless of the frame member. Therefore, the shape and length of both sides of the step board supported by this bracket are not restricted by the shape of the frame members, etc., and there is freedom in determining the width of the footrest space and the shape of the step board. degree increases.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be explained below based on an embodiment shown in the drawings.

The frame designated by reference numeral 1 in the figure is provided with a head pipe 2 at its front end. A front fork 4 is pivotally supported on the head pipe 2 via a steering shaft 3. A front wheel 5 is supported at the lower end of the front fork 4, and the front fork 4 is steered by a bar handle 6 attached to the upper end of the steering shaft 3.

A down tube 7 extending downward is connected to the rear surface of the head pipe 2. The lower end of the down tube 7 extends rearward substantially horizontally, and a pair of main frame members 8 extending rearward are connected to the rear end of this extension 7a. The main frame member 8 is made of a pipe material with a circular cross section,
They are arranged substantially parallel to each other with an interval in the left-right direction. As shown in FIG. 1, these main frame members 8 have their front ends bent in a direction approaching each other, and a flattened tongue portion 9 is formed at the tip of the bend. is connected to the down tube 7 by welding to the outer peripheral surface of the extension part 7a.

The left and right main frame members 8 have extension portions 7
a horizontal part 11 that extends rearward substantially horizontally continuously from a, a rear rising part 12 that rises rearward and diagonally upward from the rear end of this horizontal part 11, and a rear rising part 12 that extends rearward from the upper end of this rear rising part 12. Seat rail portion 1 extending substantially horizontally
It has 3. The three locations of the lower end, upper end, and intermediate portion of the rear rising portion 12 are connected to the cross member 1, respectively.
4a, 14b, and 14c, and the seat rail portions 13 are also coupled to each other via another cross member 14d. Therefore, in the case of this embodiment, the down tube 7 and the main frame member 8 constitute an underbone-shaped frame member, and the down tube 7 connected to the front end of the main frame member 8 constitutes a front rising portion. There is.

A unit swing type engine unit 16 is connected to the rear rising portion 12 of the main frame member 8 via an engine bracket 15 so as to be swingable in the vertical direction. The engine unit 16 includes a two-stroke engine 17 and a transmission case 18 extending rearward from one side of the engine 17. A rear wheel 19 is supported at the rear end of the transmission case 18, and the rear wheel 19 is driven by a continuously variable transmission (not shown) housed within the transmission case 18.

A seat 20 is arranged above the engine 17 of the engine unit 16. The sheet 20 is
It is supported on the front half of the seat rail section 13,
A fuel tank (not shown) is arranged between the seat 20 and the engine 17.

Incidentally, a step board 23 is installed on the horizontal portion 11 of the main frame member 8, and serves as a footrest for the driver. This step board 23 is integrally molded from a synthetic resin material, and its horizontal width is wider than the arrangement interval of the main frame members 8. At the rear ends of both left and right sides of the step board 23, left and right footrests 24 are continuously provided that extend rearwardly through the outer side of the rear rising portion 12. This footrest part 2
An upright wall 25 that surrounds the rear rising portion 12 from the front to the sides is integrally formed in a range from the inner edge of the step board 23 to the rear end edge of the step board 23. Such a step board 23 is installed on the horizontal portion 11 of the main frame member 8 as described below.

That is, at the front end of the main frame member 8, there is a gusset 26 for receiving the front part of the step board 23.
is installed. The gusset 26 extends in the left-right direction across the front end of the main frame member 8 and the extension portion 7a of the down tube 7, with both left and right ends projecting laterally beyond the horizontal portion 11 of the main frame member 8. There is. Support stays 27 projecting laterally are attached to the lower ends of the rear rising portions 12 of the main frame member 8, respectively. The support stay 27 is bent upward, and a pair of left and right elongated brackets 28 are attached between the support stay 27 and both left and right ends of the gusset 26. The bracket 28 projects laterally from the main frame member 8 and extends in the front-rear direction substantially parallel to the horizontal portion 11 of the main frame member 8. Therefore, the bracket 28 has a gusset 26
The front end of the horizontal portion 11 of the main frame member 8 and the lower end of the rear rising portion 12 are connected together with the support stay 27 and the main frame member 8 is reinforced. Then, the left and right sides of the step board 23 are superimposed on the upper surface of this bracket 28, and the bolts 29
It is fixed by tightening it through. Further, in the case of this embodiment, the rear end portion of the bracket 28 is connected to the rear rising portion 12.
extends rearward through the sides of the The rear end extension 30 extends along the footrest 24 of the step board 23 and supports the footrest 24.

The front end of the step board 23 is connected to a leg shield 32 that integrates a front fender 31, and this leg shield 32 covers the head pipe 2 and down tube 7.

The rear end of the step board 23 is connected to a cover 35 made of synthetic resin that covers the area from the seat 20 to the upper circumference of the engine unit 16. cover 3
5 includes a front cover 36 that extends from the upright wall 25 of the step board 23 and covers the area from the front of the rear rising portion 12 to the area around the engine 17; Seat rail part 1 from the top
A pair of left and right side covers 37 that cover the area from the side to 3, and an upper cover 3 that spans between the rear upper ends of these side covers 37 and covers the rear of the seat rail portion 13 from above.
It is divided into 8 parts. The front cover 36 is attached to the bolt 39
The top cover 38 is supported by a cross member 14b connecting the upper ends of the rear rising portion 12 via the
is supported by a cover bracket 41 welded to the rear end of the seat rail portion 13 via another bolt 40. The side cover 37 also has hooks 3 formed on its inner surface.
7a into the locking hole 4 of the front cover 36 and top cover 38.
2, it is connected to the front cover 36 and the top cover 38, respectively. At the same time, the lower front end of the side cover 37 is superimposed on the footrest 24 of the step board 23 from the side, and the bolt 43
are connected via. Note that a rubber sealing material 44 is interposed in a continuous portion between the side cover 37, the top cover 38, and the front cover 36.

As shown in FIG. 4, a plurality of locking tongues 45 are integrally provided at intervals on the inner surface of the lower end of the front cover 36 which is connected to the upright wall 25 of the step board 23. These locking tongue pieces 45 are attached to the lower edge 36 of the front cover 36.
An engagement groove 46 is formed between the engagement groove 46 and the
The upright wall 25 is inserted from below. In the case of this embodiment, a metal reinforcing plate 47 is attached to the inner surface of the upright wall 25 over substantially the entire surface thereof. The reinforcing plate 47 is fixed to the upright wall 25 at a plurality of locations via rivets 48 made of synthetic resin. Rivet 48 is
As shown in FIG. 6, it includes a male engager 49 and a female engager 50. A plurality of slits 51 are formed in the peripheral wall of the female engager 50, and the female engager 50 has a locking hole 47a drilled in the reinforcing plate 47,
The fixing hole 25a is fitted into a fixing hole 25a formed in the upright wall 25 facing the erected wall 25. When the male engager 49 is fitted into the female engager 50, the outer diameter of the tip end of the female engager 50 is expanded. is fixed to the upright wall 25.

Note that the rivet 48 located at the upper end of the upright wall 25 is covered and hidden by the lower edge 36a of the front cover 36, as shown in FIG. 5, so that it cannot be seen from the outside. .

According to this configuration, since the brackets 28 are provided on the left and right outer sides of the horizontal portion 11 of the main frame member 8 and extend in the front-rear direction along the horizontal portion 11, the distance between the main frame members 8 is The left and right sides of the step board 23, which is also wide, can be supported by the brackets 28. For this reason, even if the step board 23 that supports the driver is made of synthetic resin, the left and right sides of the step board 23, where the driver often places his feet, are
It can be supported reliably and firmly.

Further, in supporting the left and right sides of the step board 23, the horizontal portion 11 of the main frame member 8 is
Since there is no need to widen the spacing between the rear raised portions 12 and the seat rail portions 13 that are connected to the horizontal portion 11, there is no need to widen the spacing between the rear rising portions 12 and the seat rail portions 13. For this reason, a cover 35 that covers the periphery of the seat rail portion 13 from the rear rising portion 12 is provided.
The front cover 36 of the cover 35 can be prevented from protruding over the step board 23 without increasing the size.

At the same time, the bracket 28 cooperates with the gusset 26 and the support stay 27 to connect the front end of the horizontal section 11 and the lower end of the rear rising section 12, thereby reinforcing the main frame member 8. Therefore, the rigidity especially around the horizontal portion 11 of the main frame member 8 is improved. Therefore, compared to the case where there is no bracket 28, the main frame member 8 can be made of a pipe material with a smaller diameter, and the installation space for the step board 23 can be expanded accordingly. Therefore, in addition to being able to prevent the front cover 36 from protruding onto the step board 23, a wide foot space can be secured on the step board 23, making it easy to get on and off the vehicle.
This has the advantage of increasing the degree of freedom in riding posture.

Furthermore, since the bracket 28 is a separate component independent of the main frame member 8, the length in the front and back direction can be reduced by extending the rear end to the side of the rear rising portion 12. It can be set freely regardless of the shape of the member 8. Therefore, even when the footrest portions 24 extending to the sides of the rear rising portion 12 are formed on both left and right sides of the step board 23, the footrest portions 24 can be supported by the rear end extension portions 30 of the brackets 28. . At the same time, the shape of the step board 23 is no longer restricted by the shape of the main frame member 8, and the degree of freedom in determining the size of the footrest space on the step board 23 and the shape of this step board 23 is increased. I will do it.

Furthermore, since the bracket 28 is attached to the pair of main frame members 8 that are spaced apart from each other on the left and right sides, the length of the bracket 28 overhanging the main frame members 8 in the lateral direction can be suppressed to a minimum, making it easier to operate. When a person places his or her feet on the step board 23, the bending force applied to the mounting portion of the bracket 28 is reduced. Therefore, it is convenient to ensure the rigidity of the attachment part of the bracket 28, and accordingly, the step board 23 can be firmly held, and this bracket 28 can be prevented from increasing in size, and the weight of the frame 1 can be reduced. There are advantages such as

[0031]

Effects of the Invention According to the present invention described in detail above, even if the step board is made of synthetic resin, the rigidity of the mounting portion can be ensured sufficiently, and the left and right sides of the step board where the driver frequently places his or her feet can be secured. can be supported reliably and firmly.

Furthermore, when supporting the left and right sides of the step board, there is no need to widen the spacing between the frame members, so the cover that covers the rear rising part of the frame member and around the engine unit becomes larger. This can prevent the cover from protruding onto the step board without causing any damage. At the same time, since the frame member is reinforced by the bracket, the rigidity of the frame member is improved, and the frame member itself can be made thinner than when there is no bracket. Therefore, the installation space for the step board can be expanded, the cover can be prevented from protruding onto the step board, and a wide foot space can be secured on the step board, making it easier to get on and off. Of course, the degree of freedom in riding posture increases.

Furthermore, since the length and shape of the bracket can be freely set regardless of the shape of the frame member, the shape of the step board is not restricted by the shape of the frame member, and the width and shape of the footrest space can be adjusted. This has the advantage of increasing the degree of freedom in determining the shape of the step board.

[Brief explanation of drawings]

FIG. 1 is an exploded perspective view showing a frame, a step board, and a cover in one embodiment of the present invention.

FIG. 2 is an enlarged side view showing a continuous portion of the step board and the cover.

FIG. 3 is a side view of the scooter type motorcycle.

FIG. 4 is a sectional view taken along line A-A in FIG. 2;

FIG. 5 is a sectional view taken along line BB in FIG. 2;

FIG. 6 is an exploded cross-sectional view showing the area around the rivet.

[Explanation of symbols]

1... Frame, 4... Front fork, 7, 8... Frame member (down tube, main frame member), 1
2... Rear rising portion, 14a... Cross member, 16... Engine unit, 17... Engine, 19... Rear wheel, 20...
Seat, 28...Bracket, 35...Cover.

Claims (1)

[Claims] Claim 1: A frame member is provided with a frame member recessed downward between the front fork and the seat, and a step board for resting the driver's feet on the bottom of the recess, the frame member of the frame being recessed downward between the front fork and the seat. has a front rising portion and a rear rising portion extending upward on both front and rear sides sandwiching the step board, and
At least the part extending rearward from the bottom of the step board is made up of a pair of pipes spaced apart from each other in the left-right direction, and the engine and rear wheels are connected to the rear rising part located at the rear of the step board. In a scooter-type motorcycle, the frame member is configured by connecting a swing-type engine unit with an integrated unit so as to be able to swing vertically, and covering the engine unit and the rear rising portion with a cover. A pair of left and right pipe materials are connected to each other via a cross member in the vicinity of the lower end of the rear rising portion, and the lower ends of the rear rising portion are connected to each other at positions projecting outward from these pipe materials to the left and right, respectively. A scooter characterized in that a pair of left and right brackets are provided that connect the vicinity and the vicinity of the lower end of the front rising part and extend in the front-rear direction, and the left and right sides of the step board are placed on these brackets. shaped motorcycle.