JP2008230525A - Foot rest structure for motorcycle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a foot rest structure for a motorcycle capable of always stably performing jumping up action of the foot rest. <P>SOLUTION: In the foot rest structure for the motorcycle, a base end 1A of the foot rest 1 is upwardly turnably and pivotally supported on a bracket 2 mounted to a side part of a vehicle body by a pin (pivot shaft) 4. On the base end 1A of the foot rest 1 and the bracket 2, stopper parts 1a, 2c for restricting downward turning of the foot rest 1 by engaging them with each other and retaining the foot rest 1 to an approximately horizontal normal position are formed. The cylindrical lower cylinder part 1c concentrical to the pin 4 is formed on an outer periphery of the base end below the stopper part 1a of the foot rest 1. A lower side cover part 2e having a distal end opposed to the lower cylinder part 1c of the foot rest 1 with a fine clearance δ and covering the both stopper parts 1a, 2c from below is provided on the bracket 2. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a footrest structure for a motorcycle in which a base end portion of a footrest is pivotally supported by a bracket attached to a vehicle body side portion so as to be pivotable upward by a pivot shaft.

  In a motorcycle, a pair of left and right footrests on which a rider puts his / her foot is provided on both sides of a vehicle body. Examples of conventional footrest structures are shown in FIGS.

  7 is a side view showing a normal state of the conventional footrest structure, FIG. 8 is a side view showing the state of the footrest structure when it is flipped up, and FIG. 9 is a perspective view showing the state of the footrest structure when it is flipped up. It is. 7 to 9 show one footrest structure, but the other footrest structure is the same, and thus illustration and description thereof will be omitted.

  7 to 9, reference numeral 102 denotes a bracket attached to a side portion of a motorcycle body by a bolt 103 (see FIG. 9). The bracket 102 is formed in a U shape in a plan view, A pair of support walls 102a parallel to each other is provided, and a base end portion 101A of the footrest 101 is pivotally supported by these support walls 102a so as to be pivotable upward by pins 104.

  Further, a stopper portion 101a is formed at the base end portion 101A of the footrest 101, and this stopper portion 101a normally engages with the bracket 102 as shown in FIG. 7 to rotate the footrest 101 downward. The footrest 101 is held at a substantially horizontal normal position. In this state, the rider can drive with his feet on the footrest 101. The footrest 101 is urged by a return spring (not shown) in a direction to hold a substantially horizontal normal position.

  By the way, when the footrest 101 is brought into contact with the ground in corners, banking, etc., as shown in FIGS. 8 and 9, the footrest 101 turns up around the pin 104 against the urging force of the return spring and jumps up. It is configured so that it can be prevented from getting caught on the road surface.

  However, when the footrest 101 jumps up as shown in FIGS. 8 and 9, a large space B (space hatched in FIG. 8) is formed between the base end portion 101 </ b> A of the footrest 101 and the bracket 102. When 101 is grounded, mud, sand or the like enters the space B. Even if mud, sand or the like enters the space B in this way, they do not cause a problem because they fall from the opening of the space B. If the bite is bitten, the footrest 101 may not be returned to the normal substantially horizontal normal position by the urging force of the return spring, and may be in a state of being raised.

  Therefore, Patent Document 1 has a configuration in which recesses (turned portions) are formed on the engagement surfaces of the stopper portions of the footrest and the bracket, and mud that has entered the stopper portions is pushed out into the space formed by the recesses and eliminated. Has been proposed.

In Patent Document 2, a mud cover is integrally formed with the foot rest below a gap formed between the foot rest and the bracket, and the tip of the bracket is opposed to the inner surface of the mud cover with a small gap. Thus, a configuration has been proposed in which mud or the like is prevented from entering the stopper portion.
Utility Model Registration No. 2554977 Japanese Patent No. 3166391

  However, since the configuration proposed in Patent Document 1 does not actively prevent the mud or the like from entering the stopper portion, there is a problem in that the mud cannot be reliably prevented from adhering to the stopper portion. .

  Moreover, although the structure proposed in Patent Document 2 can positively prevent the entry of mud or the like into the stopper portion, the mudproof cover protrudes downward during normal traveling. There is a problem that the footrest may not be properly raised due to collision with an obstacle or the like.

  The present invention has been made in view of the above problems, and the intended process is to prevent the entry of mud and the like into the stopper portion and to prevent the footrest from colliding with obstacles on the road surface and to lift the footrest. It is to provide a footrest structure for a motorcycle that can always be stably performed.

In order to achieve the above object, the invention according to claim 1 is a footrest structure for a motorcycle in which a base end portion of a footrest is pivotally supported by a bracket attached to a side portion of a vehicle body so as to be pivotable upward by a pivot shaft. In
The base end portion of the footrest and the bracket are engaged with each other to form a stopper portion that restricts the downward rotation of the footrest and holds the footrest in a substantially horizontal normal position.
Forming a lower cylindrical part concentric with the pivot shaft on the outer periphery of the base end part below the stopper part of the footrest,
The bracket is provided with a lower cover portion whose front end faces the lower cylindrical portion of the footrest with a small gap and covers the stopper portions from below.

  According to a second aspect of the present invention, in the first aspect of the present invention, an upper cylindrical portion concentric with the pivot shaft is formed on the outer periphery of the base end portion above the stopper portion of the footrest. The upper end portion of the footrest faces the upper cylindrical portion of the footrest with a predetermined gap, and an upper cover portion that covers the stopper portions from above is provided.

  A third aspect of the present invention is the footrest structure for a motorcycle according to the second aspect, wherein the upper cover portion is formed by a stopper portion of the bracket.

  The invention according to claim 4 is the invention according to claim 2 or 3, wherein the bracket is U-shaped, and a pair of left and right support walls sandwiching the base end portion of the footrest from both sides is provided, and the upper cylindrical portion and the The upper cover portion, the lower cylindrical portion, and the lower cover portion are always opposed to each other at least within the rotation range of the footrest, and the support wall of the bracket, the upper and lower cylindrical portions, and the upper and lower covers A stopper chamber is formed by the portion, and both the stopper portions are accommodated in the stopper chamber.

  According to the first aspect of the present invention, since the tip of the lower cover portion of the bracket is opposed to the lower cylindrical portion of the footrest with a minute gap, entry of mud or the like into the stopper portion is prevented, and mud Etc. and pebbles do not bite. Further, since there is no footrest that protrudes downward during normal traveling, the footrest does not collide with an obstacle or the like on the road surface during deformation. For this reason, when the footrest comes in contact with the ground during cornering or bank running, the footrest is always surely jumped up, and the footrest is reliably prevented from being caught on the road surface.

  According to invention of Claim 2, since the front-end | tip of the upper cover part of the bracket was made to oppose with a fine clearance gap with the upper cylindrical part of the footrest, the penetration | invasion of the mud etc. from the upper direction to a stopper part can also be prevented, The flip-up operation is performed more stably.

  According to the third aspect of the present invention, since the upper cover portion is formed by the stopper portion of the bracket, it is not necessary to separately form the upper cover portion separately, and the manufacture of the bracket is facilitated.

  According to the invention described in claim 4, since the upper cylindrical portion and the upper cover portion and the lower cylindrical portion and the lower cover portion are always opposed to each other at least within the rotation range of the footrest, the stopper portion is provided regardless of the position of the footrest. Intrusion of mud, etc. into the can surely be prevented. Since the footrest and the stopper portion of the bracket are accommodated in a substantially sealed stopper chamber formed by the support wall of the bracket, the upper and lower cylindrical portions, and the upper and lower cover portions, mud to the stopper portion is accommodated. And the like can be prevented more reliably.

  Embodiments of the present invention will be described below with reference to the accompanying drawings.

  FIG. 1 is a right side view of a motorcycle having a footrest structure according to the present invention. A motorcycle 10 shown in the figure is for off-road use, and a head pipe 11 is disposed at the front upper part of the vehicle body. A steering shaft (not shown) is rotatably inserted into the head pipe 11. A steering wheel 12 is attached to the upper end of the steering shaft, a front fork 13 is attached to the lower end of the steering shaft, and a front wheel 14 as an operating wheel is rotatable at the lower end of the front fork 13. It is pivotally supported.

  A pair of left and right main frames 15 extend obliquely downward from the head pipe 11 toward the rear of the vehicle body, and a pair of left and right down tubes 16 extend substantially vertically downward. The left and right down tubes 16 extend downward and then are bent at a substantially right angle toward the rear of the vehicle body, and the rear ends thereof are connected to the rear end portions of the main frame 15 via a pair of left and right rear arm brackets 17. ing.

  Thus, a water-cooled engine 18 as a drive source is mounted in a space surrounded by the pair of left and right main frames 15, the down tube 16 and the rear arm bracket 17. A fuel tank 19 is disposed above the water-cooled engine 18. The seat 20 is disposed behind the seat 20. A radiator 21 is disposed in front of the water cooling engine 18.

  By the way, the pair of left and right rear arm brackets 17 provided at the lower part of the center of the vehicle body in the front-rear direction has a front end portion of the rear arm 22 supported by a pivot shaft 23 so as to swing up and down. A rear wheel 24 as a driving wheel is rotatably supported at the end. The rear arm 22 is suspended from the vehicle body via a link mechanism 25 and a rear cushion 25 connected thereto.

  The pair of left and right rear arm brackets 17 are attached with a footrest 1 for a rider to put his / her foot on so as to protrude substantially horizontally toward the outside.

  Here, the structure of the footrest 1, which is the gist of the present invention, will be described with reference to FIGS.

  2 is a side view showing a normal state of the footrest structure according to the present invention, FIG. 3 is a partial side sectional view showing a normal state of the footrest structure, and FIG. 4 is a state when the footrest structure is flipped up. FIG. 5 is a perspective view showing a state when the footrest structure is flipped up, and FIG. 6 is a partial side sectional view showing a state when the footrest structure is flipped up. 2 to 6 show only one side footrest structure, the other side footrest structure is the same, and illustration and description thereof will be omitted.

  2 to 6, reference numeral 2 denotes a bracket attached to the rear arm bracket 17 of the motorcycle 10 shown in FIG. 1 by two upper and lower bolts 3 (see FIGS. 3 and 6). A pair of support walls 2a which are formed in a letter shape and are parallel to each other are provided on the left and right sides thereof. These support walls 2a sandwich a block-like base end portion 1A of the footrest 1 from both left and right sides, and the base end portion 1A of the footrest 1 is supported on the support wall 2a by a pin 4 serving as a pivot shaft. It is pivotally supported. The footrest 1 is biased by a return spring (not shown) in a direction (downward) for holding a substantially horizontal normal position (see FIGS. 2 and 3).

  A saw blade-like non-slip portion 1B-1 is formed on the upper surface of the main body 1B of the footrest 1, and is close to the pin 4 of the base end 1A, as shown in detail in FIGS. An arc concave curved stopper portion 1a is formed at the site. Further, an upper cylindrical portion 1b and a lower cylindrical portion 1c that are concentric with respect to the axial center of the pin 4 are integrally formed above and below the stopper portion 1a of the base end portion 1A of the footrest 1, respectively. Is formed.

  On the other hand, as shown in detail in FIG. 3 and FIG. 6, a protrusion 2 b is integrally formed on a surface of the bracket 2 facing the footrest 1 and sandwiched between a pair of left and right support walls 2 a. The lower inclined surface of the projection 2b forming the arc convex curved surface constitutes the stopper portion 2c, and the upper inclined surface constitutes the upper cover portion 2d. Here, the upper cover portion 2d is opposed to the upper cylindrical portion 1b formed on the footrest 1 with a small gap between the top cover portion 2d and the stopper portion 1a on the footrest 1 side and the stopper portion 2c on the bracket 2 side from above. Covering. In addition, each dimension is set so that the upper cylindrical part 1b of the footrest 1 and the upper cover part 2d of the bracket 2 always face each other at least within the rotation range of the footrest 1.

  Further, a lower cover portion 2e that branches in a branch shape toward the footrest 1 side (outside of the vehicle body) is integrally projected at the lower portion of the bracket 2, and the tip of the lower cover portion 2e is The lower cylindrical portion 1c formed on the footrest 1 is opposed to the lower cylindrical portion 1c with a small gap δ, and covers the stopper portion 1a on the footrest 1 side and the stopper portion 2c on the bracket 2 side from below. Note that the lower cylindrical portion 1c of the footrest 1 and the lower cover portion 2e of the bracket 2 are set so as to face each other at least within the rotation range of the footrest 1, and a constant distance between them is always provided. A minute gap δ is formed.

  In the configuration described above, particularly when the footrest 1 is flipped up as shown in FIG. 6, the support wall 2a of the bracket 2 and the upper and lower cylindrical portions 1b, 1c are interposed between the footrest 1 and the bracket 2. A stopper chamber S which is substantially sealed is formed by the upper and lower cover portions 2d and 2e, and the stopper portion 1a on the footrest 1 side and the stopper portion 2c on the bracket 2 side are accommodated in the stopper chamber S.

  Thus, during normal running, the stopper portion 1a of the footrest 1 is engaged with the stopper portion 2c of the bracket 2 as shown in FIGS. 2 and 3, and therefore the downward rotation of the footrest 1 is restricted. 1 is held at a substantially horizontal normal position, and in this state, the rider can drive with his feet on the footrest 1.

  By the way, when the footrest 1 is brought into contact with the ground in corners or bank running, as shown in FIGS. 4 to 6, the footrest 1 rotates upward about the pin 4 against the urging force of a return spring (not shown). Jumps up and gets caught on the road surface. Since the stopper portion 1a of the footrest 1 is provided close to the pin 4 as described above, when the footrest 1 is flipped up, as shown in FIG. 4, the base end portion 1A of the footrest 1 and the bracket 2 The space A formed between the two spaces is suppressed to be smaller than the conventional space B shown in FIG. 8 and the space A spreads downward in a C shape. Yes. For this reason, in a state where the footrest 1 is flipped up, mud or the like hardly enters the space, and even if it enters, it is easily discharged from the space A.

  As described above, in the present embodiment, since the tip of the lower cover portion 2e of the bracket 2 is opposed to the lower cylindrical portion 1c of the footrest 1 with a minute gap δ, mud or the like from the lower side of the stopper portions 1a and 2c Intrusion is prevented, and mud or the like does not adhere to the stopper portions 1a and 2c, and pebbles do not bite. Further, since there is no footrest 1 that protrudes downward during normal traveling, the footrest 1 does not collide with an obstacle or the like on the road surface during deformation. For this reason, when the footrest 1 is in contact with the ground during cornering or bank running, the footrest 1 is always surely jumped up, and the footrest 1 is reliably prevented from being caught on the road surface.

  In addition, according to the present embodiment, since the tip of the upper cover portion 2d of the bracket 2 is opposed to the upper cylindrical portion 1b of the footrest 1 with a minute gap, entry of mud or the like from above into the stopper portions 1a and 2c is also possible. This can prevent the footrest 1 from being flipped up more stably. In particular, in the present embodiment, since the upper cover portion 2d is formed by the stopper portion 2c (projection 2b) of the bracket 2, it is not necessary to separately mold the upper cover portion 2d, and the manufacture of the bracket 2 is facilitated. .

  Further, since the upper cylindrical portion 1b and the upper cover portion 2d and the lower cylindrical portion 1c and the lower cover portion 2e are always opposed to each other at least within the rotation range of the footrest 1, the stopper portions 1a, Intrusion of mud or the like into 2c can be reliably prevented. The footrest 1 and the stopper portions 1a and 2c of the bracket 2 are substantially sealed stoppers formed by the support wall 2a of the bracket 2, the upper and lower cylindrical portions 1b and 1c, and the upper and lower cover portions 2d and 2e. Since it is accommodated in the chamber S, intrusion of mud or the like into the stopper portions 1a and 2c is more reliably prevented.

  Although the present invention has been described with respect to an embodiment in which the present invention is applied to an off-road motorcycle, the present invention is of course applicable to any other motorcycle including on-road. It is.

1 is a right side view of a motorcycle including a footrest structure according to the present invention. It is a side view which shows the state at the normal time of the footrest structure which concerns on this invention. It is a fragmentary sectional side view which shows the normal state of the footrest structure which concerns on this invention. It is a side view which shows the state at the time of flipping up of the footrest structure which concerns on this invention. It is a perspective view which shows the state at the time of flipping up of the footrest structure which concerns on this invention. It is a fragmentary sectional side view which shows the state at the time of flipping up of the footrest structure which concerns on this invention. It is a side view which shows the state of the normal time of the conventional footrest structure. It is a side view which shows the state at the time of flipping up of the conventional footrest structure. It is a perspective view which shows the state at the time of flipping up of the conventional footrest structure.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Footrest 1A Base end part of a footrest 1B Main part of a footrest 1B-1 Non-slip part of a footrest 1a Stopper part of a footrest 1b Upper cylindrical part of a footrest 1c Lower cylindrical part of a footrest 2 Bracket 2a Stopper part of a bracket 2b Bracket protrusion 2c Bracket stopper 2d Bracket upper cover 2e Bracket lower cover 3 Bolt 4 Pin (Pivot)
DESCRIPTION OF SYMBOLS 10 Motorcycle 11 Head pipe 12 Handle 13 Front fork 14 Front wheel 15 Main frame 16 Down tube 17 Rear arm bracket 18 Water cooling engine 19 Fuel tank 20 Seat 21 Radiator 22 Rear arm 23 Pivot shaft 24 Rear wheel 25 Link mechanism 26 Rear cushion A Space S Stopper Chamber δ Minute gap

Claims (4)

In a footrest structure for a motorcycle, in which a base end portion of a footrest is pivotally supported by a pivot shaft so as to be pivoted upward on a bracket attached to a side of a vehicle body.
The base end portion of the footrest and the bracket are engaged with each other to form a stopper portion that restricts the downward rotation of the footrest and holds the footrest in a substantially horizontal normal position.
Forming a lower cylindrical part concentric with the pivot shaft on the outer periphery of the base end part below the stopper part of the footrest,
A footrest structure for a motorcycle, wherein the bracket is provided with a lower cover portion whose front end faces the lower cylindrical portion of the footrest with a small gap and covers both stopper portions from below.   An upper cylindrical portion concentric with the pivot shaft is formed on the outer periphery of the base end portion above the stopper portion of the footrest, and a tip of the bracket faces the upper cylindrical portion of the footrest with a predetermined gap. The footrest structure for a motorcycle according to claim 1, further comprising an upper cover portion that covers the stopper portions from above.   The footrest structure for a motorcycle according to claim 2, wherein the upper cover portion is formed by a stopper portion of the bracket. A pair of left and right support walls sandwiching the base end portion of the footrest from both sides is provided with the bracket as a U shape, and at least the upper cylindrical portion, the upper cover portion, the lower cylindrical portion, and the lower cover portion A stopper chamber is formed by the support wall of the bracket, the upper and lower cylindrical portions, and the upper and lower cover portions so as to face each other within the rotation range of the footrest, and the stopper portions are accommodated in the stopper chamber. The footrest structure for a motorcycle according to claim 2 or 3, wherein the footrest structure is a motorcycle.

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