JP5329261B2 - Headlight optical axis adjustment structure - Google Patents

Description

  The present invention relates to an optical axis adjustment structure of a headlight for aiming a headlight of a vehicle.

  Conventionally, a straddle-type vehicle such as a motorcycle has a structure for adjusting the optical axis of a headlight (see, for example, Patent Document 1).

  In the prior art, as shown in FIGS. 1 and 2, a headlight (lamp body) 20 is attached to a handle cover 5, and the handle cover 5 is constituted by an upper half 5a and a lower half 5b. Has been. Aiming of the headlight 20 is performed by a long hole portion (adjustment hole) 19 provided in the lower half 5b, an adjustment piece 23 attached to the headlight 20, and an aiming bolt 28.

Japanese Patent No. 2619751

  By the way, in the configuration of the above prior art, since the aiming bolt 28 comes into contact with the lower half 5b, there is a possibility of damaging the lower half 5b which is also an appearance part of the vehicle at the time of aiming. . Moreover, in order to determine the mounting position of the aiming shaft and the bolt, it is necessary to increase the rigidity of the lower half 5b, and the thickness must be increased.

  The present invention has been made in connection with such a prior art, and can provide an optical axis adjustment structure for a headlight that can keep the appearance of the vehicle good and that can make the vehicle body cover lightweight and compact. The purpose is to provide.

An optical axis adjustment structure (10) for a headlight according to the first aspect of the present invention includes a headlight case (82) to which a headlight bulb (78) is mounted, and the headlight case (82) . and a body cover (116) covering the periphery, an optical axis adjustment structure of the headlight to the headlight possible aiming (10), shaft support (108 mounting the headlight casing (82) rotatably and), said a long hole portion for performing aiming of headlights case (82) (100) bracket provided and (92), said bracket (92) is provided on the vehicle body cover (116) in is, wherein the body cover (116), a portion corresponding to the vehicle the elongated hole portion formed along the longitudinal direction (12) (100), the headlight case 82) is provided with holes (120, 122) for aiming operation, and the slot (100) is provided in the lower part of the bracket (92) and corresponds to the slot (100). The hole portions (120, 122) are provided below the headlight case (82) in the vehicle body cover (116), and a positioning portion (96a) for defining a mounting position of the headlight case (82) is provided on the vehicle body. The positioning portion (96a) is provided with a flange (96) formed at the lower part on the inner surface side of the left and right stays (90) provided for attaching the bracket (92) to the handle pipe (28). It is characterized by being the front end part of .

  According to the first aspect of the present invention, at the time of aiming, the bracket provided separately from the vehicle body cover is provided with the shaft support portion that is the aiming shaft and the elongated hole portion for adjusting the aiming bolt. The vehicle body cover is not damaged, and the appearance can be kept good. In addition, the vehicle body cover is not subjected to a fastening torque associated with the adjustment of the aiming bolt or a burden associated with the movement of the headlight case, so that its rigidity can be made small, and it can be made compact and lightweight. .

Further , by providing a hole for aiming operation in a portion corresponding to the elongated hole portion in the vehicle body cover, an aiming adjustment tool can be easily inserted through the hole portion without removing the vehicle body cover. be able to.

In addition , the elongated hole portion is provided in the lower portion of the bracket, and the hole portion corresponding to the elongated hole portion is provided below the headlight case in the vehicle body cover, so that the hole portion is conspicuous in appearance. The appearance of the vehicle can be further improved.

Further , since the elongated hole portion is formed along the longitudinal direction of the vehicle, aiming can be easily performed along the elongated hole portion.

Further , the positioning portion allows the headlight case to be easily attached at a predetermined position and in a predetermined posture.

1 is a side view of a motorcycle that is a saddle-ride type vehicle incorporating an optical axis adjustment structure for a headlight according to an embodiment of the present invention. It is a partially omitted side view showing the optical axis adjustment structure of the headlight according to the present embodiment. FIG. 3 is a partially omitted perspective view of the optical axis adjustment structure of the headlight shown in FIG. 2. FIG. 3 is a partially omitted cross-sectional explanatory view along the vehicle body front-rear direction showing the optical axis adjustment structure of the headlight shown in FIG. 2. It is a partially-omission perspective view which shows the bracket and stay which support a headlight unit. FIG. 3 is a partially omitted perspective view showing a motorcycle headlight to which the optical axis adjustment structure of the headlight shown in FIG. 2 is applied and its periphery. FIG. 7 is a partially omitted perspective view showing the headlight and its peripheral part in a state where the headlight cover of the motorcycle to which the optical axis adjustment structure of the headlight shown in FIG. 6 is applied is removed.

  Hereinafter, an optical axis adjustment structure of a headlight according to the present invention will be described in detail with reference to the accompanying drawings, taking an embodiment in relation to a motorcycle that is a saddle-ride type vehicle to which this structure is applied.

  FIG. 1 is a side view of a motorcycle 12 that is a saddle-ride type vehicle incorporating a headlight optical axis adjustment structure 10 (hereinafter also referred to as “optical axis adjustment structure 10”) according to an embodiment of the present invention. is there. In the present embodiment, the present invention will be described with reference to an application example to the motorcycle 12, but the present invention is not limited to this, and various saddle riding type vehicles and the like (on-road type, off-road type, and four-wheeled vehicles). It can be applied to vehicles including scooter type. For easy understanding, in each drawing, “L” is attached to the arrow indicating the left side of the vehicle body, “R” is attached to the arrow indicating the right side of the vehicle body, and An explanation will be given by adding “Fr” to the arrow indicating the front and “Rr” to the arrow indicating the rear of the vehicle body.

  As shown in FIG. 1, the motorcycle 12 includes a body frame 14, a front wheel 16 that is a steering wheel, a rear wheel 18 that is a driving wheel, a handle 20 that steers the front wheel 16, and a seat 22 on which an occupant is seated. The headlight unit 30 is provided on a handle pipe 28 that includes an engine 24 and is pivotally supported by the head pipe 26.

  A pair of left and right front forks 32 that pivotally support the front wheels 16 are pivotally supported via a steering stem 34 on the head pipe 26 fixed to the front end portion of the vehicle body frame 14. The handle 20 is attached to the handle pipe 28 that is integrally provided on the upper portion of the steering stem 34, whereby the front wheel 16 can be steered. A swing arm 37 that pivotally supports the rear wheel 18 is pivotally supported on the left and right pivot frames 36 located on the lower rear side of the body frame 14 so as to be swingable in the vertical direction. Between the steering wheel 20 and the seat 22, the vehicle height is low in a valley shape in a side view, and is configured so that the driver can easily straddle.

  The body frame 14 is configured by integrally joining a plurality of types of steel materials by welding or the like, for example. The vehicle body frame 14 includes the head pipe 26 positioned at the front end, a main frame 38 extending obliquely downward from the head pipe 26 toward the rear of the vehicle body, and the pivot frame extending downward from the rear portion of the main frame 38. 36, left and right rear frames 40 extending obliquely upward and bent from the rear end of the main frame 38, and left and right rear gusset pipes 42 bridged between the left and right rear frames 40 and the main frame 38.

  Left and right engine hangers 44 that are triangular in a side view are suspended from the front and rear intermediate portions of the main frame 38. The engine 24 is supported by the left and right pivot frames 36 at the upper and lower sides of the rear end portion of the crankcase 46, and the upper end portion of the crankcase 46 is supported by the left and right engine hangers 44, thereby being fixed to the vehicle body frame 14. For example, an air-cooled single cylinder type is mounted as the engine 24. On the left and right sides of the crankcase 46, left and right steps 41 on which the driver seated on the seat 22 puts his / her feet project.

  The rotational driving force of the engine 24 is output to the drive sprocket 43 on the left side of the rear side of the crankcase 46 via, for example, a belt-type continuously variable transmission (not shown) provided on the right side of the crankcase 46 and the drive. It is transmitted to the rear wheel 18 via the chain 45 and the driven sprocket 47.

  On the rear side of the vehicle body, the front end portion of the swing arm 37 is pivotally supported by the upper and lower intermediate portions of the left and right pivot frames 36 so as to be swingable in the vertical direction via the pivot shaft 36a. Rear cushion units 48 are provided between the rear end portions of the left and right arms constituting the swing arm 37 and the front and rear intermediate portions of the left and right rear frames 40, respectively.

  A cylinder head 52 is attached to the front end of the cylinder body 50 on the front side of the engine 24. The upper end (intake side) of the cylinder head 52 is connected to the lower end (downstream side) of the throttle body 54 that forms an intake passage extending vertically, and the upper end (upstream side) of the throttle body 54 is connected to the upper air cleaner. Connected to the bottom of box 56. A base end of an exhaust pipe 58 is connected to the lower part (exhaust side) of the cylinder head 52, and the exhaust pipe 58 extends while being curved rearward as appropriate and is connected to the silencer 60 on the right side of the rear wheel 18.

  Further, the motorcycle 12 includes a handle cover (vehicle body cover) 62 that covers from the rear side of the headlight unit 30 fixed to the body frame 14 side to the periphery of the handle 20, and a front cover 64 that covers the periphery of the head pipe 26 from the front. Left and right leg shields 66 projecting from the left and right sides of the front cover 64 so as to cover the driver's legs from the front, and a center extending upward and obliquely downward, forming a cross-section of an upwardly convex mountain shape connected to the rear of the front cover 64. A tunnel cover 68 and left and right rear side covers 70 connected to the rear of the left and right sides of the center tunnel cover 68 are attached. These covers are mainly composed of synthetic resin, for example.

  The seat 22 supported above the left and right rear side covers 70 is configured integrally with a driver seat in the front half and a passenger seat in the rear half. A storage box 72 that can store articles such as a helmet is disposed below the front half of the seat 22 and surrounded by the left and right rear side covers 70. The storage box 72 is opened and closed as the seat 22 rotates about the front hinge axis. On the other hand, a fuel tank 74 that stores fuel for the engine 24 is disposed below the rear half of the seat 22 and between the left and right rear side covers 70. The fuel tank 74 exposes its fuel filler opening when the seat 22 is opened. In addition, a battery 76 that is an in-vehicle power source is disposed in a forward inclined posture on the rear side of the bottom of the storage box 72.

  Next, the optical axis adjustment structure 10 of the headlight according to the present embodiment incorporated in the motorcycle 12 basically configured as described above will be described with reference to FIGS.

  As shown in FIG. 4, the headlight unit 30 applied to the optical axis adjusting structure 10 according to the present embodiment includes a headlight bulb 78 that is attached to the inside of a headlight case 82 from the rear side, A reflector 80 that reflects 78 light and a position light bulb 81 provided below the headlight bulb 78 are fixed and housed in the headlight case 82. Reference numeral 83 in FIG. 4 is a wire harness used for energizing the headlight bulb 78 and the position light bulb 81 and transmitting a control signal.

  As shown in FIGS. 2 to 4, the headlight case 82 includes a flat semicircular headlight base 86 having a mounting hole 84 in which a headlight bulb 78 is mounted formed on the back surface, and a headlight base 86. It is composed of a substantially semicircular transparent or semitransparent headlight lens 88 mounted on the front side.

  Such a headlight unit 30 (headlight case 82) is attached to a bracket 92 that is fixed between the front end portions of a pair of left and right stays 90 that project from the front side of the handle pipe 28. Supported on the side.

  The stay 90 is attached to the vehicle body side (vehicle body frame 14) by being fixed to the handle pipe 28 by welding or bolt fastening. The bracket 92 is configured in a substantially U shape when viewed from the front (see FIG. 5), and the upper and lower middle portions of the left and right arm portions 92a extending in the vertical direction of the vehicle body are respectively bolts 94 with respect to the front end portions of the left and right stays 90. Fastened (see FIGS. 2 and 3). The bolt 94 is fastened to a welding nut 91 joined to the bracket 92 side through a hole (not shown) formed in the stay 90. At this time, the bracket 92 is abutted against the front end portion (positioning portion) 96a of the flange 96 formed at the lower part on the inner surface side of the left and right stays 90, so that the attachment position and the attachment angle with respect to the stay 90 are uniquely defined. (See FIGS. 2 and 3). Of course, the positioning portion of the bracket 92 may be other than the configuration using the flange 96, and may be formed using, for example, a convex portion or a concave portion.

  As shown in FIG. 5, a lower portion of the bracket 92, which is a U-shaped bottom portion located between the left and right arm portions 92a, has a jaw-shaped protruding portion 92b extending in an arc shape obliquely upward on the front side of the vehicle body. Is provided. A long hole (long hole portion) 100 extending along the longitudinal direction of the vehicle body is formed at the center of the protruding portion 92b in the vehicle width direction. The aiming bolt 102 of the headlight unit 30 is inserted into the long hole 100 from the lower side to the upper side, and the aiming bolt 102 protrudes to the lower surface side of the headlight case 82 (headlight base 86). (Slider portion) Fastened to a screw hole 106 formed on the lower surface side of 104 (see FIG. 4).

  Holes 93 (see FIG. 5) are formed in the vicinity of the upper ends of the left and right arm portions 92 a of the bracket 92, and the bracket 92 is supported by a rotating shaft (shaft support portion) 108 through which the headlight unit 30 is inserted. It is pivotally supported with respect to. The rotation shaft 108 is, for example, a bolt or a pin, and is fastened or fitted to a screw hole (not shown) provided on the headlight base 86 side so that the headlight unit 30 can rotate with respect to the bracket 92. The

  As a shaft support portion (aiming shaft) for rotatably mounting the headlight unit 30 with respect to the bracket 92, a configuration other than the configuration using the rotating shaft 108 formed of a bolt or the like as described above may be used. The pin protruding from the headlight base 86 may be inserted into the hole on the bracket 92 side, and the main point is that the headlight unit 30 (headlight case 82 with respect to the bracket 92 on the vehicle body side) ) May be used as long as it can be pivotally supported.

  That is, as shown in FIGS. 2 to 4, the headlight case 82 is pivotally supported on the left and right arm portions 92 a by the pivot shaft 108 with respect to the bracket 92 on the vehicle body side. The fastening portion 104 at the lower center is fixed to a predetermined position in the longitudinal direction of the long hole 100 with respect to the protruding portion 92b by the ming bolt 102.

  As shown in FIGS. 2, 3 and 5, the left and right stays 90 are provided with a first fastening portion 112 provided at a substantially central portion in the longitudinal direction of the vehicle body and projecting outward, and a bracket 92 at the tip portion. The 2nd fastening part 114 provided in the outer side of this fastening part is formed.

  As shown in FIGS. 6 and 7, the lower surface of the upper cover 62 a of the handle cover 62 that is divided into upper and lower parts is fastened to the first fastening portion 112 (see FIG. 3) by a bolt or the like (not shown). The side surface of the lower cover 62 b of the handle cover 62 is fastened to the second fastening portion 114 together with a rim-shaped (annular) headlight cover (vehicle body cover) 116 by bolts (screws) 117.

  The headlight cover 116 covers the joint between the handle cover 62 and the headlight case 82, the joint between the headlight base 86 and the headlight lens 88 constituting the headlight case 82, and the like. Along with the fastening to the fastening portion 114, it is hooked and fixed to a rib 118 (see FIG. 7) provided at the upper front end portion of the upper cover 62a. The rib 118 enters the inside of the headlight cover 116 and is hooked.

  Therefore, the bracket 92 and the stay 90 are easily accommodated inside the handle cover 62 and the headlight cover 116, and are not substantially exposed on the appearance of the motorcycle 12, thereby ensuring the appearance.

  As shown in FIGS. 4, 6, and 7, in the handle cover 62 (lower cover 62 b) and the headlight cover 116 that are vehicle body covers that cover the periphery of the headlight unit 30, below the headlight case 82, Notches (holes) 120 and 122 for exposing the aiming bolt 102 and the long hole 100 to the outside are formed. The notches 120 and 122 may have any shape that allows the aiming bolt 102 to be operated within the range of the long hole 100 while the vehicle body cover is attached and the headlight case 82 can be operated. The elongated hole 100, which is the moving range of the bolt 102, may have a slightly enlarged shape and may be set to a size that allows the top of the aiming bolt 102 to be exposed.

  The optical axis adjustment structure 10 according to the present embodiment is basically configured as described above. Next, operations related to optical axis adjustment and the effects thereof will be described.

  First, at the time of manufacturing the motorcycle 12 (at the time of factory shipment), the headlight unit 30 (headlight case 82) is attached to the stay 90 by the rotating shaft 108, and the aiming bolt 102 is attached to a predetermined hole in the long hole 100. The fastening portion 104 is fastened at an initial position (for example, a central portion in the axial direction). Thereby, the headlight unit 30 and the bracket 92 are integrally coupled at a predetermined initial angle. This initial angle is, for example, a straight line θ0 extending from the pivot shaft 108 that is the pivot point of the headlight unit 30 in FIG. 4 to the aiming bolt 102. A mark such as a scale (not shown) may be provided around the periphery of the long hole 100 (as an indication of the initial position or optical axis angle).

  Subsequently, the bracket 92 to which the headlight unit 30 is integrally fixed is fixed to the stay 90 with a bolt 94 (see FIGS. 2 and 3). At this time, the bracket 92 is abutted against the front end portion 96a of the flange 96 provided on the stay 90, and is reliably positioned and fixed at a predetermined position. For this reason, the headlight unit 30 has its optical axis set at a constant initial position (initial angle), for example, in the direction of the arrow L0 in FIG.

  Next, the handle cover 62, the headlight cover 116, and the like are fastened, so that the joint of the handle cover 62 and the headlight case 82 and the stay 90 and the bracket 92 are appropriately covered (see FIG. 6). The aiming bolt 102 and the long hole 100 which are optical axis adjusting means are exposed below the headlight case 82 by the notches 120 and 122 (see FIGS. 4 and 6).

  Therefore, when the optical axis adjustment is performed on the headlight unit 30 mounted on the vehicle body side by incorporating such an optical axis adjustment structure 10, first, below the headlight unit 30, that is, the handle cover 62 and the headlight cover. A predetermined tool (for example, a driver) is inserted from the notches 120 and 122 below 116, and the aiming bolt 102 is loosened. Next, the aiming bolt 102, the headlight case 82, and the like are gripped, and the headlight unit 30 (headlight case 82) is fastened by the fastening portion 104 with the pivot shaft 108 serving as a rotation fulcrum (aming point). It moves so that it may slide on the part 92b. Then, after turning the headlight unit 30 by a desired angle (see arrow θ in FIG. 4), the aiming bolt 102 is fastened again. Thereby, the optical axis adjustment of the headlight can be quickly set to a desired angle with a simple structure and a small number of parts.

  Specifically, when adjusting the optical axis of the headlight unit 30 at the angle indicated by the straight line θ0 in FIG. 4 and the optical axis being set in the direction of the arrow L0, for example, the headlight unit 30 is rotated to the angle indicated by the straight line θ1. Thus, the optical axis is adjusted in the direction of the arrow L1, and similarly, the optical axis is adjusted in the direction of the arrow L2 by rotating to the angle indicated by the straight line θ2.

  In this case, as shown in FIG. 4, the optical axis adjustment structure 10 is configured such that the position of the rotation shaft 108, that is, the aiming point, coincides with the substantially central portion of the headlight bulb 78 in a side view. . Therefore, since the rotation angle of the headlight unit 30 and the rotation angle of the headlight bulb 78 substantially coincide with each other, the operability of the optical axis adjustment can be further improved, and more intuitive adjustment is possible.

  Further, in the optical axis adjustment structure 10, the rotation shaft 108 that is an aiming shaft that rotatably supports the headlight case 82 and the long hole 100 that is an aiming adjustment bolt hole cover the periphery of the headlight unit 30. It is provided separately from the handle cover 62 and the headlight cover 116 which are vehicle body covers. That is, since the aiming bolt 102 is fastened to the fastening portion 104 together with the bracket 92 separate from the vehicle body cover, the vehicle body cover is not damaged during aiming, and the appearance can be kept good.

  In addition, the handle cover 62 and the headlight cover 116, which are vehicle body covers, are not subjected to the tightening torque associated with the adjustment of the aiming bolt 102 or the burden associated with the movement (rotation) of the headlight case 82. It can be formed as a compact and lightweight vehicle body cover with a small rigidity. That is, since the vehicle body cover is not subjected to the fastening torque or the rotation load as described above, it is not necessary to form a thick wall to increase the rigidity of the vehicle body cover. Thus, since the headlight unit 30 is reliably supported on the vehicle body side (vehicle body frame 14) via the stay 90 and the bracket 92, for example, a structure in which the headlight unit and its optical axis adjusting means are attached to the vehicle body cover side. Compared to the above, even a large-sized headlight unit or the like having a larger weight can be easily and reliably attached in a state where the optical axis can be adjusted. Therefore, even when the vehicle body cover has only a strength that is difficult to support the headlight unit, the headlight unit can be mounted without applying a load to the vehicle body cover or without thickening the vehicle body cover. The optical axis can be adjusted.

  Further, a long hole 100, an aiming bolt 102, and a fastening portion 104, which are optical axis adjusting means, are disposed below the headlight unit 30 (headlight case 82), and the handle cover 62 and the headlight cover 116 are cut there. Notches 120 and 122 are formed. Accordingly, the aiming bolt 102 can be operated by inserting a predetermined tool from the notches 120 and 122 without removing the handle cover 62 and the like, and the aiming can be facilitated. Further, when the motorcycle 12 is viewed from the front or side, the notches 120 and 122 are not conspicuous in appearance and the appearance can be improved. When the handle cover 62 and the headlight cover 116 are attached (see FIG. 6), the joint between the handle cover 62 and the headlight case 82, the stay 90 and the bracket 92 are appropriately hidden, so that the automatic The appearance of the motorcycle 12 can be further improved.

  As described above, the handle cover 62 and the headlight cover 116 are fastened together with the stay 90 by the bolt 117 and engaged with each other by the rib 118. For this reason, when the headlight case 82 is rotated by aiming, it is possible to effectively prevent the misalignment between the handle cover 62 and the headlight cover 116, and as a result, work related to optical axis adjustment can be further improved. It can be simplified.

  Further, according to such an optical axis adjustment structure 10, when the headlight bulb 78 and the position light bulb 81 are replaced, first, the bolt 117 is removed from the second fastening portion 114 (see FIGS. 6 and 7), and the rim is removed. The headlight cover 116, which is a vehicle body cover, is removed (see FIG. 7). Subsequently, the bolt 94 fixing the bracket 92 to the stay 90 is removed. Thereby, the headlight unit 30 can be easily removed integrally with the bracket 92 from the vehicle body side, the headlight bulb 78 can be easily replaced, and the maintainability is also improved.

  At this time, the aiming bolt 102 may remain in a state of being fastened to the fastening portion 104 on the headlight case 82 side through the long hole 100, that is, it is not necessary to loosen the aiming bolt 102. Moreover, the bracket 92 to which the headlight unit 30 is integrally fixed is again returned to the original position under the positioning action by the flange 96 provided on the stay 90, as in the case of manufacturing (at the time of factory shipment). It is fixed to the vehicle body at the position. Therefore, according to the optical axis adjustment structure 10 according to the present embodiment, the headlight bulb 78 and the like can be exchanged without shifting the angle while maintaining the optical axis angle that has been adjusted once.

  The present invention is not limited to the above-described embodiment, and it is needless to say that various configurations and processes can be adopted without departing from the gist of the present invention.

  For example, the bracket 92 to which the headlight case 82 is attached may be configured integrally with the stay 90. In this case, the replacement of the headlight bulb 78 is somewhat complicated, but the mounting structure of the headlight case 82 can be further simplified.

  Further, the aiming bolt 102 functioning as the optical axis adjusting means may be configured as a nut, and the fastening portion 104 on the headlight case 82 side may be configured as a bolt (planted bolt). As long as the structure can be securely fixed to the bracket 92 (vehicle body side) at a predetermined position.

DESCRIPTION OF SYMBOLS 10 ... Optical axis adjustment structure of headlight 12 ... Motorcycle 14 ... Body frame 26 ... Head pipe 28 ... Handle pipe 30 ... Headlight unit 62 ... Handle cover 78 ... Headlight bulb 82 ... Headlight case 90 ... Stay 92 ... Bracket 92b ... Projection part 96 ... Flange 100 ... Long hole 102 ... Aiming bolt 104 ... Fastening part 106 ... Screw hole 108 ... Rotating shaft 116 ... Headlight cover 120, 122 ... Notch

Claims (1)

A headlight case (82) to which the headlight bulb (78) is attached;
A vehicle body cover (116) covering the periphery of the headlight case (82) ;
An optical axis adjustment structure (10) for a headlight that enables aiming of the headlight,
A bracket (92) provided with a shaft support (108 ) for rotatably mounting the headlight case (82) and a slot (100) for aiming the headlight case (82) ; ,
The bracket (92) is provided in the vehicle body cover (116) ,
The body cover (116) has a hole for aiming the headlight case (82) in a portion corresponding to the elongated hole (100) formed along the longitudinal direction of the vehicle (12). Parts (120, 122) are provided,
The elongated hole (100) is provided in a lower portion of the bracket (92), and the holes (120, 122) corresponding to the elongated hole (100) are provided in the head of the vehicle body cover (116). Provided below the light case (82),
A positioning part (96a) for defining the mounting position of the headlight case (82) is provided on the vehicle body side,
The positioning portion (96a) is a front end portion of a flange (96) formed at the lower part on the inner surface side of the left and right stays (90) provided for attaching the bracket (92) to the handle pipe (28). An optical axis adjustment structure for a headlight characterized by the above-mentioned (10) .

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