JP5005591B2 - Grab rail structure in motorcycles - Google Patents

Description

  The present invention relates to an improvement in the structure of a grab rail, particularly in a motorcycle in which a synthetic resin grab rail is fixedly arranged behind a passenger seat.

A motorcycle in which a synthetic resin grab rail disposed behind a vehicle seat is fastened to the rear part of a pair of left and right seat rails included in a vehicle body frame is known from Patent Document 1.
JP 2002-68044 A

  By the way, in what was disclosed by the said patent document 1, in order to ensure the intensity | strength of the front part of a grab rail, between the front-end parts of the right and left both sides of a grab rail is connected with the cross-maser. In the configuration in which the cross member is arranged in this way, it is necessary to secure a space for the cross member to pass through the rear part of the motorcycle. In a motorcycle in which the storage box is arranged below the riding seat, the cross member is stored. The storage capacity of the box may be sacrificed.

  The present invention has been made in view of such circumstances, and avoids an increase in the number of parts and ensures a sufficient capacity of the storage box while providing a grab rail with sufficient strength. An object is to provide a rail structure.

  In order to achieve the above object, a first aspect of the present invention is a motorcycle in which a synthetic resin grab rail is fixedly arranged behind a riding seat, and the synthetic resin is arranged below the riding seat. The grab rail of the front opening type is integrally formed in a storage box made of metal.

  According to a second aspect of the invention, in addition to the configuration of the first aspect of the invention, frame members constituting a part of the vehicle body frame are arranged on both sides of the storage box, and the grab rails are integrally connected. The flat connecting portions are integrally formed on both sides of the storage box, and the connecting portions are fastened to the frame member by fastening members.

  According to a third aspect of the present invention, in addition to the configuration of the second aspect of the invention, the connecting portion is fastened to the frame member by a plurality of the fastening members arranged at positions spaced in the front-rear direction. It is characterized by that.

  According to a fourth aspect of the present invention, in addition to the configuration of the first aspect of the present invention, a flat cargo bed is integrally formed at the rear part of the grab rail.

  Further, the invention according to claim 5 is characterized in that, in addition to the configuration of the invention according to any one of claims 1 to 4, a reinforcing member is embedded in at least a part of the grab rail.

  The rear frame pipe 8 of the embodiment corresponds to the frame member of the present invention, and the bolt 25 of the embodiment corresponds to the fastening member of the present invention.

  According to the invention of claim 1, by forming the grab rail of the front opening type integrally with the storage box, it is possible to reduce the number of parts by eliminating the need for a dedicated part for attaching the grab rail to the vehicle body frame, In addition, since a part of the storage box functions as a cross member, the strength of the grab rail can be ensured, and the capacity of the storage box can be sufficiently ensured because the cross member is unnecessary. In addition, the vertical length of both side walls of the storage box is larger than the vertical width of the grab rail, so that the load acting on the grab rail can be received by both side walls of the storage box, ensuring sufficient strength. can do.

  According to the second aspect of the present invention, since the connecting portion, which is a continuous portion of the grab rail and the storage box, is fastened to the frame member, the integration of the grab rail and the storage box can be strengthened, The number of parts can be reduced as compared with the case where the box and the grab rail are individually fastened to the frame member.

  According to invention of Claim 3, since it fastens to a frame member with the some fastening member arrange | positioned in the position spaced apart in the front-back direction, it can make integration of a grab rail and a storage box stronger. it can.

  According to the fourth aspect of the invention, since the flat cargo bed is integrally formed at the rear part of the grab rail, the cargo bed can be formed while avoiding an increase in the number of parts.

  Furthermore, according to the invention described in claim 5, the strength of the grab rail can be remarkably increased by the reinforcing member embedded in at least a part thereof.

  DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below based on examples of the present invention shown in the accompanying drawings.

  1 to 3 show a first embodiment of the present invention. FIG. 1 is a left side view of a motorcycle, and FIG. 2 is an enlarged view taken along line 2-2 of FIG. 1 with a body cover removed. FIG. 3 is a cross-sectional view, and FIG. 3 is a view taken in the direction of arrow 3 of FIG. 1 with the riding seat removed.

  First, in FIG. 1, a body frame F of a scooter type motorcycle includes a main frame pipe 6 having a head pipe 5 fixed to the front end, a cross pipe 7 fixed to the rear end of the main frame pipe 6 at a right angle, A pair of left and right rear frame pipes 8 are provided with front ends connected to both ends of the pipe 7 respectively. A front fork 9 that pivotally supports the front wheel WF and a steering handle 10 connected to the front fork 9 are supported on the head pipe 5 so as to be steerable.

  The main frame pipe 6 is formed by integrally connecting a down frame portion 6a inclined downward from the head pipe 5 and a lower frame portion 6b extending substantially rearward from the lower end of the down frame portion 6a. A substantially central portion of the cross pipe 7 extending in the left-right direction of the frame F is connected to the rear end of the lower frame portion 6b at a right angle. The rear frame pipes 8 are first inclined so as to extend rearwardly from the end of the cross pipe 7 so as to extend rearwardly with a gentler slope than the first inclined frame portions 8a. It has 2nd inclination frame part 8b ... connected to the upper end part of inclination frame part 8a ... integrally.

  An engine disposed in front of the rear wheel WR and a left side of the rear wheel WR so as to transmit the output of the engine to the rear wheel WR are disposed in front of both rear frame pipes 8 in the body frame F. A unit swing type power unit P comprising a transmission device is supported so as to be able to swing up and down, and the rear wheel WR is pivotally supported at the rear portion of the power unit P. Above the power unit P, a storage box 11 formed in a box shape with an upper end opened by a synthetic resin is disposed, and the storage box 11 is supported by the rear frame pipes 8.

  The vehicle body frame F is covered with a vehicle body cover 12 made of synthetic resin. The vehicle body cover 12 is provided under the leg shield 13 that covers the front of the driver's feet and the leg shield 13 for placing the rider's feet. A tandem-type riding seat 16 that includes a step floor 14 that is continuous, and a side cover 15 that is continuous with the step floor 14 and covers the rear part of the vehicle body from both sides. Is provided.

  In FIG. 2, the passenger seat 16 is formed by filling a cushion material 19 between a seat bottom plate 17 and a seat skin 18 whose outer periphery is fixed to the outer periphery of the seat bottom plate 17. A seal member 21 is provided on the lower surface of the sheet bottom plate 17 so as to come into contact with the sheet support portion 20 formed in a substantially U shape and opened downward.

  Referring also to FIG. 3, a grab rail 22 </ b> A that is formed in a front open shape with synthetic resin so as to be substantially U-shaped in plan view is fixedly arranged behind the riding seat 16. The grab rail 22A is formed integrally with the storage box 11.

  The rear frame pipes 8 as frame members constituting a part of the vehicle body frame F are arranged on both sides of the storage box 11, and on the rear portions of the second inclined frame portions 8b in the rear frame pipes 8 ... A mounting base 23... Having a substantially U-shaped cross-sectional shape opened downward is fixed.

  On the other hand, connecting portions 24, 24 projecting outward from the seat support portion 20 are integrally formed on both sides of the rear portion of the storage box 11, and the left and right front ends of the grab rail 22A are connected to the connecting portions 24. The parts are integrally connected.

  The connecting portions 24 are formed flat so as to face the mounting bases 23 fixed to the rear frame pipes 8 from above, and the connecting portions 24 are fastening members. The bolts 25 are fastened to the mounting bases 23 fixed to the rear frame pipes 8. In addition, the connecting portions 24 are formed to have a length in the front-rear direction larger than the width in the left-right direction, and a plurality of, for example, a pair of bolts 25 disposed at positions spaced in the front-rear direction. The connecting portions 23 are fastened to the mounting bases 23 of the rear frame pipes 8.

  The connecting portions 24 are fitted with metal cylindrical collars 26 through which the bolts 25 are inserted, and the mounting bases 23 are in contact with the lower ends of the collars 26. A pair of nuts 27, 27... Having a flange portion 27 a. Thus, the connecting portions 24 are fastened to the mounting bases 23 of the rear frame pipes 8 by screwing the bolts 25 inserted through the collars 26 into the nuts 27.

  Moreover, as shown in FIG. 2, a reinforcing member 28 is embedded in at least a part of the grab rail 22A, in this embodiment, most of the grab rail 22A. The reinforcing member 28 may be made of metal, or may be made of a reinforced synthetic resin having higher strength than the synthetic resin forming the grab rail 22A.

  Next, the operation of the first embodiment will be described. The synthetic resin storage box 11 disposed below the riding seat 16 is integrally formed with a grab rail 22A formed of a synthetic resin in a front open shape. Therefore, the number of parts can be reduced by eliminating the need for dedicated parts for attaching the grab rail 22A to the body frame F, and the strength of the grab rail 22A can be increased because a part of the storage box 11 serves as a cross member. The capacity of the storage box 11 can be sufficiently secured because the cross member is unnecessary. Further, since the vertical length of both side walls of the storage box 11 is larger than the vertical width of the grab rail 22A, the effect of receiving the load acting on the grab rail 22A on the both side walls of the storage box 11 can be obtained. High strength can be ensured.

  Further, rear frame pipes 8 constituting a part of the vehicle body frame F are arranged on both sides of the storage box 11, and flat connection portions 24 to which the grab rails 22 </ b> A are integrally connected are integrally formed on both sides of the storage box 11. Are formed and fastened to the mounting base 23 of the rear frame pipe 8 with bolts 25, 25, so that the integration of the grab rail 22A and the storage box 11 can be strengthened. Compared with the case where the storage box 11 and the grab rail 22A are individually fastened to the frame member, the number of parts can be reduced.

  The connecting portions 24 are formed to have a length in the front-rear direction larger than the width in the left-right direction, and are connected by a plurality of bolts 25, 25 arranged at positions spaced in the front-rear direction. Are fastened to the mounting bases 23 of the rear frame pipes 8, so that the integration of the grab rail 22A and the storage box 11 can be further strengthened.

  Further, since the reinforcing member 28 made of a reinforced synthetic resin having a higher strength and a different material from that of the metal or the grab rail 22A is embedded in at least a part of the grab rail 22A, the strength of the grab rail 22A is increased at least. It can be remarkably increased by the reinforcing member 28 embedded in a part.

  FIG. 4 shows a second embodiment of the present invention, in which a flat loading platform 29 is integrally formed at the rear portion of the grab rail 22B which is formed integrally with the storage box 11 and arranged behind the riding seat 16. The

  According to the second embodiment, in addition to the effects of the first embodiment, the loading platform 29 can be formed while avoiding an increase in the number of parts.

  Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and various design changes can be made without departing from the present invention described in the claims. It is.

1 is a left side view of a motorcycle according to a first embodiment. It is an expanded sectional view which follows the 2-2 line of Drawing 1 in the state where a body cover was removed. FIG. 3 is a view taken in the direction of arrow 3 in FIG. FIG. 6 is a left side view of a motorcycle according to a second embodiment.

Explanation of symbols

8 ... Rear frame pipe 11 as frame member ... Storage box 16 ... Riding seats 22A, 22B ... Grab rail 24 ... Connecting portion 25 ... Bolt 28 as fastening member ... -Reinforcing member 29 ... cargo bed F ... body frame

Claims (5)

  In a motorcycle in which a synthetic resin grab rail (22A, 22B) is fixedly disposed behind the riding seat (16), a synthetic resin storage box (below the riding seat (16)) ( 11) A grab rail structure in a motorcycle, wherein the grab rails (22A, 22B) of a front opening type are integrally formed.   A frame member (8) constituting a part of the vehicle body frame (F) is disposed on both sides of the storage box (11), and the flat connecting portion (24) in which the grab rails (22A, 22B) are integrally connected. 2) are integrally formed on both sides of the storage box (11), and their connecting portions (24) are fastened to the frame member (8) by fastening members (25). Grab rail structure for motorcycles.   The said connection part (24) is fastened to the said frame member (8) by the said several fastening member (25) arrange | positioned in the position spaced apart in the front-back direction, The automatic of Claim 2 characterized by the above-mentioned. Grab rail structure for motorcycles.   The grab rail structure in a motorcycle according to any one of claims 1 to 3, wherein a flat cargo bed (29) is integrally formed at a rear portion of the grab rail (22B).   The grab rail structure in a motorcycle according to any one of claims 1 to 4, wherein a reinforcing member (28) is embedded in at least a part of the grab rail (22A, 22B).

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