JP2013006504A - Seat support structure of saddle-riding type vehicle and height adjusting method of seat - Google Patents

Abstract

PROBLEM TO BE SOLVED: To further reduce weight and cost, while relieving a request for dimensional accuracy, by further simplifying a support structure of a seat in a saddle-riding type vehicle such as a motorcycle 1 more than a conventional structure.SOLUTION: A downward projecting engaging projection part (for example, a tongue piece 134) is arranged nearer to the front than the center in the longitudinal direction in a bottom plate 130 of a front seat 13 straddled by an occupant. A support object part (for example, a rubber leg 136) supported by abutting on the vehicle body frame side, is arranged nearer to the rear than the center. A seat bracket 40 is detachably fixed to the vehicle body frame side. The seat bracket 40 is provided with a front side support part (for example, a pipe member 41) laterally extending so as to be gripped by the engaging projection part and to support the bottom plate 130 of the front seat 13 from below.

Description

  The present invention relates to a seat support structure in a straddle-type vehicle such as a motorcycle, and more particularly to a structure for adjusting a seat height.

  Conventionally, in a saddle type vehicle such as a motorcycle, in order to be able to adjust the height of the seat over which the occupant strides in multiple stages according to its physique, for example, the bottom plate of the seat is attached to the body frame by a movable link mechanism. Various support structures have been proposed, such as supporting (Patent Document 1) or providing a stepped support portion on a bottom plate or a body frame (Patent Document 2).

  Patent Document 3 discloses a structure in which two types of high and low support seats are provided on a support member interposed between a seat and a vehicle body frame so that the height of the seat can be adjusted with a simpler structure. Is disclosed. In this structure, two types of support seats are provided at the four corners of the support member having a rectangular frame shape, and the support member is mounted on a pair of left and right seat rails and slid forward and backward to thereby provide rubber feet for the seat. The height of the support seat that abuts is switched.

JP-A-2005-349907 JP 2007-118890 A JP 2007-50822 A

  However, even the structure of Patent Document 3 is a structure in which a pair of left and right seat rails are attached to the vehicle body frame, and a support member is mounted thereon to support the seat, and at the four corners of the support member. Since two types of support seats must be provided for each, it cannot be said that the structure is very simple, and there is still room for reducing weight and cost.

  In addition, the height of the support seats provided at the four corners of the support member must be the same for each of the four heights. Therefore, if the accuracy of the dimensions of the seat rail and the support member is not increased, There is a difficulty that rattling occurs.

  In view of the above, an object of the present invention is to further reduce the weight and cost while relaxing the demand for dimensional accuracy by making the seat support structure in a saddle-ride type vehicle simpler than before. is there.

  In order to achieve the above object, the present invention is directed to a seat support structure on which a rider straddles a straddle-type vehicle, and an engagement protrusion that protrudes downward toward the front of the front-rear direction center of the bottom plate of the seat. On the other hand, a supported portion that is supported in contact with the vehicle body frame side is provided behind the center. Further, the bracket fixed to the vehicle body frame so as to be detachable is provided with a bar-shaped front support portion that is gripped by the engaging protrusion and extends to the left and right so as to support the bottom plate of the seat from below.

  With the above-described configuration, the rear portion of the seat that catches the weight of the occupant is stably supported by contacting the vehicle body frame side, while the front portion of the seat is placed on the rod-like front support portion that extends in the left and right directions. With this simple structure, the front side support portion is gripped by the engagement protrusion of the bottom plate of the seat, so that it can be positioned and supported not only in the vertical direction but also in the front-rear direction.

  And since the bracket provided with the front support part is detachably fixed to the vehicle body frame side, if a plurality of brackets having different front support part heights are prepared in advance, it is easy to replace them. The seat height can be adjusted. Thus, since the number of parts is very small with a very simple structure, the weight and cost can be further reduced as compared with the prior art. Further, since there is no need to align the heights of a large number of support points as in the conventional example, the requirement for dimensional accuracy is relaxed, which is also advantageous for cost reduction.

  Preferably, the engaging protrusion is provided at a middle portion in the left-right direction at a front portion of the bottom plate, protrudes downward and then bends forward, and the left-right middle portion of the front support portion is rearward. You may comprise so that it may hold | grip from. Note that the intermediate portion in the left-right direction may be, for example, an intermediate portion when equally divided into leftward, rightward, and intermediate portions thereof.

  In this case, the front support portion is formed of a round pipe, and a recess portion with which the upper surface abuts is formed so as to extend in the left-right direction on the lower surface of the bottom plate, and the engagement is performed in close proximity to the recess portion. Protrusions may be provided and formed in a J-shape that curves along the outer periphery of the round pipe.

  By so doing, the front support part is fitted between the recess of the bottom plate of the sheet and the engagement protrusion, so that the positioning and support state of the sheet by the front support part can be further stabilized. Therefore, for example, even when the vehicle is suddenly braked, the displacement of the seat position can be prevented.

  On the other hand, the supported portions provided on the rear side of the bottom plate of the seat may be configured by separate elastic members that are detachably fitted to the fitted portions of the bottom plate, with a space between each other in the left-right direction. Good. By providing the supported portions with a space left and right, it is possible to stably support the portions of the occupant's buttocks that receive the left and right loads at the rear of the seat. In addition, you may provide an additional supported part between the left and right supported parts so that it may contact | abut to the vehicle body frame side, when a baseplate bends below.

  In addition, by configuring the supported portion with an elastic member such as rubber as an example, it is possible to absorb relatively high frequency vibrations and improve riding comfort. If the elastic members having different heights are prepared in advance, the height of the rear portion of the seat can be adjusted by exchanging them.

  Thus, when the supported parts at the rear part of the seat are provided at the left and right parts, the front support part of the bracket that supports the front part is held by the engaging protrusion at the intermediate part in the left and right direction. Therefore, the sheet (bottom plate) can be regarded as a substantially three-point support by combining the grip portion and the supported portion. Therefore, the requirement of dimensional accuracy for the body frame, the bracket, the bottom plate of the seat, etc. is eased.

  Furthermore, as the bracket, for example, a metal plate material is bent, and a base plate portion that is overlapped and fastened to a pedestal portion on the body frame side from above, and a side plate portion that is bent upward from at least one side edge thereof and extends upward. And the front support portion may be welded to the upper portion of the side plate portion. If it carries out like this, the material and processing cost of a bracket can be suppressed.

  In this case, a pressing portion for fixing the vehicle equipment may be integrally formed on the other side in the left-right direction of the base plate portion of the bracket. The vehicle equipment may be anything as long as it is arranged near the seat, such as a battery, a canister, an ABS unit, etc., and these holding portions are formed together when the plate material is bent as described above. Then, further cost reduction can be achieved.

  In addition, a bracket for fixing the fuel tank may be fastened to the base part on the vehicle body frame side to which the base plate part of the bracket is fastened. In this case, the pedestal for supporting the seat can be used for fixing the fuel tank adjacent to the front of the seat, which also contributes to cost reduction.

  In other words, the present invention is a method of adjusting the height of the seat in the saddle riding type vehicle including the seat support structure according to any one of claims 1 to 8. That is, as the bracket, a plurality of brackets with different front support heights are prepared in advance, and by selecting one of them, the height of the seat supported by the selected bracket is adjusted. can do.

  As described above, the seat support structure for a saddle-ride type vehicle according to the present invention supports the front portion of the seat with the front support portion of the detachable bracket, and the rear portion contacts the body frame side. If a plurality of brackets having different front support portions are prepared in advance, the seat height can be easily adjusted by replacing them. Since there is no need to align the heights of a large number of support points as in the conventional example, the weight and cost can be reduced as much as possible, coupled with the relaxation of the requirement for dimensional accuracy.

1 is a left side view showing a schematic configuration of a motorcycle according to an embodiment of the present invention. It is the same top view. It is the perspective view which looked at the frame structure of the vehicle body center vicinity by which a front seat is arrange | positioned from the diagonally upper left back. It is the perspective view which looked at the front seat individually from (a) diagonally from above and (b) diagonally from below. It is sectional drawing showing the support structure of the front seat from the left side. FIG. 5 is a perspective view showing the front seat support structure with the seat skin and cushion material omitted. FIG. 7 is a view corresponding to FIG. 6 mainly showing a seat bracket with the bottom plate omitted. FIG. 8 is an exploded view corresponding to FIG. 7 showing a seat bracket mounting structure. FIG. 6 is a view corresponding to FIG. 5 when the support height of the front seat is changed.

  Hereinafter, a motorcycle 1 (saddle-ride type vehicle) according to an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a left side view showing a schematic configuration of the motorcycle 1 with lights and cowls removed, and FIG. 2 is a similar plan view. The direction concept used in the following description is based on the direction seen by the rider (occupant) riding the motorcycle.

  The motorcycle 1 includes a front wheel 2 that is a driven wheel and a rear wheel 3 that is a driving wheel. The front wheel 2 is rotatably supported by lower ends of a pair of left and right front forks 4 extending substantially in the vertical direction, and an upper portion of the front fork 4 is connected to a steering shaft (not shown) via a pair of upper and lower fork brackets 5. It is supported. The steering shaft is inserted into a head pipe 6 that forms a part of the body frame of the motorcycle 1 and is rotatably supported.

  Handles 7 are attached to the upper ends of the left and right front forks 4, respectively, and the rider can steer the front forks 4 and the front wheels 2 around the steering shaft by grasping these handles 7. Although not shown, the right handle 7 is integrally provided with a throttle grip that is gripped by the user's right hand, and a front lever 2 brake lever is disposed in front of the right handle 7, while the left handle A clutch lever is disposed in front of 7.

  As shown in FIGS. 1 and 2, the body frame of the motorcycle 1 includes a main frame 8 that is inclined slightly downward from the head pipe 6 and extends rearward, and a rear frame that is connected to the rear end thereof via a cross member 9. 10. As shown in FIG. 2, the rear frame 10 includes a backbone frame 11 positioned substantially at the center of the vehicle body width, and a rear pipe frame 12 connected to the rear thereof. As represented by the phantom line, a front seat 13 on which a rider rides is disposed at the upper portion of the backbone frame 11, and a rear seat 14 for a tandem rider is disposed behind the front seat.

  The backbone frame 11 is formed by integrating a pivot frame portion that extends downward from the cross member 9 and a rear stay portion that extends rearward. Plate-like subframes 15 are disposed on both the left and right sides of the pivot frame portion, respectively. Are connected by a stay (not shown) extending in the vehicle width direction. A pivot shaft 16a is spanned between the pivot frame portion and the sub frame 15 to support the front end portion of the swing arm 16 so as to be swingable. The rear wheel 3 is rotatably supported at the rear end portion of the swing arm 16.

  On the other hand, the main frame 8 is composed of left and right frame members 80 which are bifurcated from the head pipe 6 toward the rear, and an engine 20 having a plurality of cylinders is mounted below the main frame member 80. The cylinder block 21 and the cylinder head 22 of the engine 20 are slightly inclined forward, and the front portion of the cylinder block 21 is supported by a down frame 81 that hangs downward from the main frame 8. A crankcase 23 is attached to the lower part of the cylinder block 21, and a transmission case integrally provided at the rear part is supported by the backbone frame 11.

  Further, an exhaust port is opened for each cylinder at the front portion of the cylinder head 21, and the exhaust manifold 25 connected thereto is gathered below the engine 20 and connected to the silencer 26. A radiator 27 for exchanging heat between the coolant of the engine 20 and the traveling wind is disposed above the exhaust manifold 25 and supported by the down frame 81. On the other hand, an intake port is opened at the rear of the cylinder head 20, and a throttle body 28 is connected to the intake port. The upper portion of the throttle body 28 is connected to the lower portion of an air cleaner 29 that houses an element for filtering intake air.

  The air cleaner 29 is surrounded by the left and right frame members 80 of the main frame 8, and the upper surface of the air cleaner 29 bulges upward from the left and right frame members 80, and intake ducts 29 a respectively provided at the left and right corners of the front portion. Extends forward through the upper and lower round pipes of the frame member 80. The traveling wind taken in by the intake duct 29a can be smoothly supplied into the air cleaner 29, and the air suction efficiency can be increased by using the traveling wind pressure.

  A fuel tank 30 is disposed from the upper side to the rear side of the air cleaner 29 (represented by a broken line) and is covered with a tank cover 31. In the present embodiment, in order to provide an electrical component installation space in front of the fuel tank 30, the fuel tank 30 is disposed rearward in the tank cover 31, and the rear end portion is behind the rear end of the main frame 8. And overlaps with the front portion of the backbone frame 11.

  Then, the frame structure near the center of the vehicle body where the rear end of the fuel tank 30 is located is enlarged and shown in FIG. 3, only the left and right frame members 80 of the main frame 8 are constituted by two round pipes 80a and 80b arranged vertically, and a joint member 82 that connects the rear ends thereof. It is connected to the upper part of the cross member 9. As an example, the cross member 9 is formed by stacking two press-formed steel plates 9a and 9b in the front-rear direction to form a substantially rectangular thick plate shape, and welding a thick square pipe 9c along its lower edge to close it. It has a cross-sectional structure.

  With this structure, the cross member 9 has high rigidity while saving space, and a space for arranging the rear end portion of the fuel tank 30 is secured from the upper side to the rear side. That is, as shown in FIG. 3, the cross member 9 extends downward from the lower part of the joint member 82, which is the rear end of the main frame 8, with a slight rearward tilt. The front part of the backbone frame 11 is welded from the bottom to the bottom. The rear end portion of the fuel tank 30 is positioned from the upper side to the rear side of the cross member 9.

  As described above, the backbone frame 11 is formed by integrating the pivot frame portion extending downward from the cross member 9 and the rear stay portion extending rearward. Similar to the cross member 9 described above, a closed cross-sectional structure is formed. With this structure, the backbone frame 11 also has high rigidity while being space-saving, and space for arranging vehicle equipment is secured on the left and right sides thereof.

  A pedestal portion 17 is disposed on the front end of the backbone frame 11, that is, on the upper portion of the rear stay portion extending from the portion welded to the cross member 9 to the rear rear pipe frame 12, so as to extend from side to side. The rear end portion of the fuel tank 30 is supported at the front portion via the tank bracket 18 (see FIGS. 5, 7, and 8). From the front edge of the upper surface of the pedestal portion 17 to about か ら is an inclined portion that becomes higher toward the front, and the rear portion of the tank bracket 18 is overlapped and fastened to the inclined portion from above.

  On the other hand, the rear 2/3 range on the upper surface of the pedestal portion 17 is generally horizontal, and the seat bracket 40 is fastened as described in detail below (see FIGS. 5, 7, and 8). Reference), the front portion of the front seat 13 is supported. That is, the pedestal portion 17 is a member on the vehicle body frame side to which the seat bracket 40 that supports the front seat 13 is fastened. In the present embodiment, the pedestal portion 17 is shared with the pedestal that fixes the tank bracket 18 as described above, thereby reducing the Costs are being reduced.

-Sheet support structure-
In FIG. 3, the front seat 13 is disposed in the vicinity of the rear of the fuel tank 30 as indicated by an imaginary line. Hereinafter, with reference to FIGS. 4-7, the support structure of the front seat 13 in this embodiment is demonstrated in detail. FIGS. 4A and 4B show the front seat 13 as a single body. FIG. 4A is a perspective view as viewed from diagonally above, and FIG. FIG. 5 is a cross-sectional view showing the support structure of the front seat 13 as seen through from the left side, FIG. 6 omits the skin and cushioning material, and FIG. It is a perspective view showing the support structure of the front seat 13 by.

  As an example, as shown in FIG. 4A, the front seat 13 has a middle convex shape that is narrower toward the front and raised toward the center. And as it goes to the rear, the seat width gradually increases and the bulge becomes smaller, and the rear end becomes almost flat. Because the front width of the seat is narrow and the swell is large, the rider can easily move his / her weight to the left and right during cornering. In addition, since the width behind the seat is wide, the hips of the rider are stable, and the ride comfort during cruising is good.

  As shown in FIGS. 5 and 6 in addition to FIG. 4B, the front seat 13 includes a bottom plate 130 that is a resin molded product, and a cushion material such as urethane foam that is affixed to the upper surface of the bottom plate 130. 131 (represented only with reference to FIG. 5) and a seat skin 132 that covers the cushion material 131 from the upper surface to the left and right side surfaces and the front and rear surfaces. In the present embodiment, resin side cowls 133 (represented by imaginary lines) are also disposed so as to hang downward from the left and right side edges of the bottom plate 130.

  The bottom plate 130 as a whole has a narrow trapezoidal shape in the front like the seat 13, and is formed as a front wall portion 130a that is inclined so that the height from the front edge to about ¼ increases toward the front. A side plate portion 130b extending rearward from the left and right side edges at the bottom of 130a, and a rear wall portion 130c connecting the rear edges of the left and right side plate portions 130b, are all formed integrally with the bottom portion 130d. I am doing.

  Further, as shown in FIG. 6, a bulging portion 130e extending in the left-right direction is formed between the lower edge of the front wall portion 130a of the bottom plate 130 and the front edge of the bottom portion 130d. 130b is connected. When the raised portion 130e is viewed from below the bottom plate 130, it is a recessed portion 130f that is long in the left-right direction as shown in FIG. 4 (b). Here, as shown in FIG. 5, the pipe member of the seat bracket 40 is shown. 41 (front support portion) is accommodated to support the front portion of the front seat 13.

  As shown in FIG. 5, the cross-sectional shape at the back of the recessed portion 130f with which the upper portion of the pipe member 41 abuts is a substantially arc shape, and preferably abuts on the pipe member 41 having a circular cross section. In addition, a tongue piece 134 that protrudes obliquely downward forward from the rear edge near the center in the left-right direction of the recess 130f so as to grip the substantially horizontal center of the pipe member 41 accommodated in the recess 130f. Engagement protrusions) are formed. The tongue piece 134 is bent while being directed downward along the rear surface of the recessed portion 130f, is bent forward, and holds the pipe member 41 having a circular cross section as shown in FIG. Thus, it is a J-shape that curves along the outer periphery thereof.

  As shown in FIG. 4B and FIGS. 5 and 6, the bottom plate 130 is formed with an opening 130 g penetrating from the bottom surface of the recessed portion 130 f to the upper surface of the raised portion 130 e above the tongue piece 134. ing. This is for die cutting when the bottom plate 130 is formed by injection molding or the like, and is a shape in which the tongue piece 134 is projected in the die cutting direction (upward). 4B, the bottom plate 130 is provided with a stay 135 that extends rearward from the substantially central portion of the rear edge, and is fixed to the rear pipe frame 12 below the rear seat 14. It is like that.

  On the other hand, in order to support the rear portion of the front seat 13, two supported portions are provided in the rear portion of the bottom plate 130 so as to be spaced apart from each other in the left-right direction. In the present embodiment, as shown in FIG. 4B, in the vicinity of the rear edge of the bottom portion 130d of the bottom plate 130 and in the vicinity of the left and right side plate portions 130b, in other words, the left and right side plate portions 130b and the rear wall. Separate rubber feet 136 (elastic members) are disposed as supported portions at the corners surrounded by the portion 130c.

  That is, the left and right corners of the bottom plate 130 are each formed with a circular seat portion 130h bulging upward as shown in FIG. 6, and a circular shape formed on the back side of the circular seat portion 130h. As an example, the upper part of a columnar rubber foot 136 is detachably fitted in the recess 130i (fitted part) of the cross section. A small-diameter protrusion 136a that penetrates the opening of the circular seat portion 130h is formed on the upper portion of the rubber foot 136, while the lower portion of the rubber foot 136 protrudes below the lower surface of the bottom plate 130, and its lower end surface However, the support member 120 is abutted and supported by a receiving member 120 (a support member on the vehicle body frame side, see FIG. 7) welded to the rear pipe frame 12.

  As shown in FIGS. 4B and 6, the bottom plate 130 is located between the left and right rubber feet 136, more precisely between the central portion thereof and the tongue piece 134 in front thereof. Is formed with a rectangular shallow protrusion 130j bulging downward. The shallow projection 130j is a backbone frame 11 when a particularly large rider rides, the cushion material 131 of the seat 13 sinks greatly due to its weight, and the bottom plate 130 is bent downward by a predetermined size or more. It is an additional supported part which contacts the upper surface of the rear frame part.

  Thus, the rear portion of the front seat 13 is stably supported by bringing the two rubber feet 136 separated from the left and right into contact with the body frame side, while the front portion of the front seat 13 is As described above, the bottom plate 130 is placed on the pipe member 41 of the seat bracket 40 in the recessed portion 130f. As shown in FIGS. 7 and 8, the seat bracket 40 is fastened to the pedestal 17 on the backbone frame 11 and supports the pipe member 41 so as to extend in the left-right direction. It has.

  As an example, the pipe member 41 is obtained by cutting a steel pipe or the like, and the length thereof is narrower than the interval between the left and right rubber feet 136 at the rear of the seat. The support member 42 is formed by bending an iron thin plate material as an example, and is represented by a reference numeral only in FIG. 8, but the substrate portion 43 superimposed on the upper surface of the pedestal portion 17 and its left and right side edges. A pair of side plate portions 44 and 45 that are bent from each other and extend upward are integrally formed.

  The substrate portion 43 has a substantially rectangular shape, and round holes 43a are diagonally opened at two locations on the right front side and the left rear side, and two holes inserted into the respective round holes 43a from above. The bolt 19 is fastened to the upper surface of the pedestal portion 17. If the two bolts 19 are loosened, the seat bracket 40 can be easily removed. Further, two rubber rings 19a are extrapolated to the shaft portion of the bolt 19, and between the upper surface of the pedestal portion 17 and the lower surface of the substrate portion 43, and between the upper surface of the substrate portion 43 and the lower surface of the washer 19b. Are interspersed with each other.

  Further, a substantially rectangular right side plate portion 44 extending upward substantially perpendicularly over substantially the entire right edge of the substrate portion 43 is provided. An arcuate cutout portion corresponding to the outer periphery of the pipe member 41 is formed in the rear portion of the upper edge of the right side plate portion 44 and is welded to the outer periphery of the pipe member 41 from below. Further, a front portion of the upper edge of the right side plate portion 44 is bent inward (leftward) to form a triangular bent piece 44 a, and its rear edge is welded to the outer periphery of the pipe member 41 from the front.

  On the other hand, the left side plate portion 45 of the support member 42 extends upward and obliquely to the left (outside) from the left side edge of the substrate portion 43. In the left side plate portion 45, an arc-shaped cutout portion is formed in the rear portion of the upper edge similarly to the right side plate portion 44, and is welded to the outer periphery of the pipe member 41. A triangular bent piece 45 a bent inward (rightward) is formed near the upper edge, and is welded to the outer periphery of the pipe member 41.

  Further, a drooping piece 45b that is bent from the rear edge of the left side plate portion 45 and extends downward is formed. The drooping piece 45b is bent forward from the lower end edge of the drooping piece 45b, as shown in FIG. A contact piece 45c that contacts the upper surface of the vehicle equipment) is formed. These hanging pieces 45b and abutting pieces 45c constitute a holding portion of the battery 34.

  Since the seat bracket 40 is configured by an inexpensive steel pipe or thin plate material, the material and processing cost are suppressed. In addition, in the present embodiment, since the holding portion of the battery 34 is also formed integrally with the support member 42 of the seat bracket 40, the cost can be reduced compared to the case where it is provided individually. 7 and 8, a round hole is opened in the contact piece 45c, and a resin plug 34a provided on the upper surface of the battery 34 is fitted therein.

  As described above, in the present embodiment, the rear portion of the front seat 13 that receives the rider's weight is directly attached to the receiving member 120 on the body frame side with the two rubber feet 136 that are spaced apart from each other on the left and right. It is made to contact | abut, and the site | part which receives the load of each right and left of a rider's buttocks can be supported stably. If the spring constant and loss factor of the rubber feet 136 are appropriately set, it is possible to absorb relatively high frequency vibrations and improve riding comfort.

  On the other hand, the front portion of the front seat 13 has a very simple structure in which the recess 130f of the bottom plate 130 is placed on the pipe member 41 of the seat bracket 40 and the pipe member 41 is gripped by the tongue piece 134 of the bottom plate 130. Can be positioned and supported vertically and front and back. Since the pipe member 41 is fitted between the recessed portion 130f of the bottom plate 130 and the tongue piece 134, the support state is stabilized, and for example, the displacement of the front seat 13 can be prevented even during sudden braking.

  Thus, the portion where the tongue piece 134 of the bottom plate 130 grips the pipe member 41 near the front of the seat and the portion where the two left and right rubber feet 136 abut against the receiving member 120 on the vehicle body frame side are combined. The front seat 13 can be substantially regarded as a three-point support, and there is no need to align the height of each support point unlike a structure that supports four or more points. Further, the position at which the tongue piece 134 grips the pipe member 41 is determined as a result of the front edge portion of the front seat 13 coming into contact with the rear portion of the tank cover 31 without any problem even if it is shifted to the left or right. Therefore, the dimensional accuracy of the bottom plate 130 of the front seat 13, the seat bracket 40, and the body frame does not need to be so high.

  Further, since the seat bracket 40 can be easily removed if the bolts 19 are loosened, a plurality of seat brackets 40 having different support heights of the pipe member 41 are prepared in advance, and the front seats are replaced by replacing them. The height of 13 can be adjusted. It should be noted that the height of the rear portion of the front seat 13 can be adjusted by preparing a plurality of rubber feet 136 having different heights and replacing them.

-Adjustment of seat height-
Next, the procedure for adjusting the seat height will be described in detail. First, the rear seat 14 is removed, and after fixing the stay 135 of the front seat 13 hidden below the rear pipe frame 12, the front seat 13 is removed. The rear portion of the seat 13 is lifted upward while pulling backward, and the gripping state of the pipe member 41 of the seat bracket 40 by the tongue piece 134 of the bottom plate 130 is released. The rubber feet 136 are removed from the rear portion of the front seat 13 thus removed and replaced with another rubber foot 137 having a higher height (see FIG. 9).

  Then, the two bolts 19 that fasten the base plate portion 43 of the support member 42 of the seat bracket 40 are loosened, the seat bracket 40 is removed from the pedestal portion 17 on the vehicle body frame side, and another seat bracket 46 ( (See FIG. 9). In the seat bracket 46, the left and right side plate portions 44, 45 of the support member 42 are long in the vertical direction, and support the pipe member 41 at a higher position, and a predetermined amount of the pipe member 41 is set according to the height difference. It is configured to be positioned at the front.

  After the base plate portion 43 of the support member 42 of the seat bracket 46 is overlapped on the upper surface of the pedestal portion 17 on the body frame side and fastened by the two bolts 19, the tongue piece 134 of the bottom plate 130 is aligned with the pipe member 41. The seat 13 is attached. As a result, as shown in FIG. 9, the height of the front seat 13 increases as the position of the pipe member 41 is increased, and the height of the front seat 13 increases toward the front as the position of the pipe member 41 advances. .

  As a result, the front edge portion of the front seat 13 moves up and down just along the inclination of the rear end portion of the tank cover 31, and even at a low position as shown in FIG. 5 and a high position as shown in FIG. However, there is no gap between the tank cover 31 and the tank cover 31. Further, the rear end portion of the front seat 13 sunk below the front end portion of the rear seat 14 at a low position as shown in FIG. 5, while it overlaps the front end portion of the rear seat 14 from above at a high position as shown in FIG. . Therefore, a sense of unity is maintained from the fuel tank 30 to the front seat 13 and the rear seat 14, and the appearance is not impaired.

  Therefore, according to the seat support structure of the motorcycle 1 according to the present embodiment, the front portion of the front seat 13 that the rider straddles is supported by the detachable seat bracket 40, while the rear portion has two rubber feet 136. It is an extremely simple structure that is supported on the vehicle body frame side via a seat. If a plurality of seat brackets 40 having different heights are prepared in advance, the seat height can be easily adjusted simply by replacing them. it can.

  Moreover, the front support portion of the front seat 13 is substantially a tongue piece 134 that grips the pipe member 41 of the seat bracket 40, and is considered as a three-point support in combination with the two rubber feet 136 that support the rear portion. Therefore, the requirement for dimensional accuracy is relaxed compared to the conventional general four-point or more support structure. Therefore, the weight and cost can be further reduced as compared with the conventional structure because of the extremely simple structure as described above and the small number of parts.

-Other embodiments-
The above description of the embodiment is merely an example, and does not limit the present invention, its application, or its use. The support structure of the seat according to the present invention can change, add, or delete the configuration of the embodiment without departing from the spirit of the present invention.

  For example, in the above-described embodiment, the seat bracket 40 that supports the front portion of the front seat 13 is configured by the pipe member 41 having a circular cross section and the support member 42 made of a thin plate material. However, the structure is not limited at all. . For example, the pipe member 41 may be constituted by a square pipe, or may be constituted by a rod-like member other than the pipe.

  Similarly, the support member 42 may not be a bent product of a thin plate material, and the shape thereof is not limited to the above embodiment. For example, the support member 42 has side plate portions 43 and 44 on both the left and right sides, but this may be, for example, only the right side wall 43 or only the left side wall 44. In the above-described embodiment, the hanging piece 45b and the abutting piece 45c are formed on the support member 42 as the pressing portion of the battery 34, but these may be omitted. It is not necessary to share the pedestal portion 17 for attaching the seat bracket 40 with the mounting seat for the tank bracket 18 of the fuel tank 30.

  In the above embodiment, the pipe member 41 has a structure in which the substantially center of the pipe member 41 is gripped by the tongue piece 134 provided on the bottom plate 130 of the front seat 13. May be. For example, the tongue piece 134 may be provided in an intermediate portion when the lower surface of the bottom plate 130 is equally divided into the left side, the right side, and the middle of them in the left-right direction. The tongue 134 is not limited to a shape that bends forward, but may be bent backward.

  Further, in the above-described embodiment, the left and right rubber feet 136 are disposed at the rear portion of the front seat 13 with a space therebetween, but the number may be three instead of two or more than a predetermined amount in the left-right direction. If there is a length, one may be sufficient. Moreover, it is good also as a structure which sticks not the detachable rubber | gum foot 136 but an elastic member. When adjusting the seat height, the height of the rubber feet 136 may not be changed. Furthermore, in the above-described embodiment, the shallow protrusion 130j is provided as an additional supported portion in the middle of the two left and right rubber feet 136, but this may be omitted.

  Furthermore, in the motorcycle 1 of the above-described embodiment, the left and right frame members 80 of the main frame 8 are connected by the cross member 9 having a closed cross-sectional structure, and the backbone frame 11 having a closed cross-sectional structure is connected to the rear thereof. This is only an example of a preferable frame structure, and other frame structures may be used. The pedestal 17 of the seat bracket 40 need not be disposed on the rear frame of the backbone frame 11.

  The straddle-type vehicle according to the present invention is not limited to the motorcycle 1, but may be, for example, an ATV (All Terrain Vehicle), a small transport vehicle, or the like. For example, an electric motor may be used.

  According to the present invention, the seat support structure in the saddle riding type vehicle can be made extremely simple, and the weight and cost can be reduced while relaxing the demand for dimensional accuracy. It is extremely useful.

1 Motorcycle (saddle-ride type vehicle)
13 Front seat (seat on which passengers ride)
130 bottom plate 130f recess 130i bottom plate fitting portion 130j additional supported portion 134 tongue piece (engaging protrusion)
136 Rubber feet (supported parts made of elastic members)
17 Base part on the body frame 18 Tank bracket (Fuel tank fixing bracket)
40 Seat bracket (detachable bracket)
41 Pipe member (front support made of round pipe)
42 support member 43 substrate part 44 right side plate part (side plate part)
45 Left side plate part 45b Hanging piece (pressing part)
45c Contact piece (pressing part)

Claims (9)

In a straddle-type vehicle, a seat support structure over which an occupant straddles,
An engaging protrusion projecting downward is provided in front of the center in the front-rear direction of the bottom plate of the seat, and supported to be supported by being in contact with the vehicle body frame side in the rear of the center. Part is provided,
A bracket detachably fixed to the vehicle body frame side is provided with a rod-like front side support portion that is gripped by the engagement protrusion and extends to the left and right so as to support the bottom plate of the seat from below. A seat support structure for a saddle-ride type vehicle.   The engaging protrusion is provided at a middle portion in the left-right direction at a front portion of the bottom plate, protrudes downward, and is bent forward, and is a middle portion in the left-right direction of the front support portion. The seat support structure according to claim 1, wherein the seat support structure is configured to grip the frame from behind.   The front support portion is formed of a round pipe, and a recess portion that abuts on the upper surface thereof is formed to extend in the left-right direction on the lower surface of the bottom plate, and close to the recess portion so as to be connected to the engagement protrusion. 3. The seat support structure according to claim 1, wherein a portion is provided and the engagement protrusion is curved in a J shape along the outer periphery of the round pipe.   The supported portion is formed of a separate elastic member that is provided at a distance from each other in the left-right direction behind the center of the bottom plate and is detachably fitted into the fitted portion of the bottom plate. The sheet support structure of any one of 1-3.   An additional supported portion is provided between the left and right supported portions made of the elastic member so that the bottom plate is supported in contact with the vehicle body frame when the bottom plate is bent downward. 4 sheet support structure.   The bracket includes a base plate portion that is overlapped and fastened to a pedestal portion on the body frame side from above, and a side plate portion that is bent from at least one side edge of the bracket and extends upward to be integrated by bending a metal plate material. The seat support structure according to claim 1, wherein the front support portion is welded to an upper portion of the side plate portion.   The seat support structure according to claim 6, wherein a pressing portion for fixing the vehicle equipment is integrally formed on the other side in the left-right direction of the base plate portion of the bracket.   The seat support structure according to claim 6 or 7, wherein a fixing bracket of a fuel tank is also fastened to the pedestal on the vehicle body frame side. A method for adjusting the height of the seat in a straddle-type vehicle including the seat support structure according to any one of claims 1 to 8,
Preparing in advance a plurality of brackets having different heights of the front support portion, and selecting one of them to adjust the height of the seat supported by the selected bracket; Characteristic sheet height adjustment method.

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