articulated vehicle

Abstract

To enable others outside a riding vehicle to easily recognize the riding vehicle when it is tilted to the left or right. In a riding vehicle comprising a lighting device (45), the lighting device (45) emits predetermined light (LA) capable of providing a higher brightness than headlight and taillight light at a predetermined position spaced away from the vehicle, wherein one direction of emission with the predetermined light (LA) is at least one direction towards the side at the front of the vehicle, one direction towards the side at the rear of the vehicle, and one direction towards the side of the vehicle, and at least one direction upwards and one downwards when the vehicle is upright.

Description

Technical field

[0001] The present invention relates to a semi-trailer-mounted vehicle. Technical background

[0002] Some vehicles are equipped with an additional lamp in a headlight unit that illuminates an area other than the illumination area of ​​a headlight. For example, in a vehicle described in patent literature 1, a large deflector lamp, a medium deflector lamp, and a large diffuser lamp are arranged in that order from the center of the vehicle outwards, and the large diffuser lamp is configured to illuminate an area near the vehicle laterally from front to sides and further to the rear, so that a driver can easily check for pedestrians, bicycles, and the like that are near the vehicle. Citation list [patent literature]

[0003] Patent Literature 1: Japanese Patent Disclosure No. 2010-111132 Summary of the invention: Technical problem

[0004] However, a primary function of such a conventional configuration is to enable a driver to check for pedestrians, bicycles, and the like, and the primary function is not to enable a driver of another vehicle or the pedestrian to easily perceive the vehicle.

[0005] One object of the present invention, which was undertaken in view of the circumstances described above, is to enable others outside a semi-trailer truck to easily recognize the semi-trailer truck when the vehicle is tilted to the left or right. Solution to the problem

[0006] This description includes all the contents of Japanese patent application no. 2023-059391, which was filed on March 31, 2023.

[0007] In a semi-trailer vehicle comprising a lighting device, the lighting device emits predetermined light which is capable of providing a higher brightness than headlight light and taillight light at a predetermined position spaced away from the vehicle, and one direction of emission with the predetermined light is at least one from a direction towards the side at the front of the vehicle, a direction towards the side at the rear of the vehicle and a direction towards the side of the vehicle, and at least one from an upward direction and a downward direction when the vehicle is upright. Advantageous effect of the invention

[0008] If a semi-trailer truck is tilted to the left or right, the semi-trailer truck can be easily recognized by others outside the vehicle. Brief description of characters [Fig. 1] Fig. Figure 1 shows a side view of a semi-trailer truck according to an embodiment of the present invention. [ Fig. 2] Fig. Figure 2 schematically shows a lighting unit positioned above a vehicle body. [ Fig. 3] Fig. Figure 3 schematically shows the first light emitted downwards from the front of the vehicle when it is upright. [ Fig. 4] Fig. Figure 4 shows, from above, a driving situation in which a number of vehicles are driving. [ Fig. 5] Fig. Figure 5 shows, from above, the semi-trailer truck together with the other vehicle. [ Fig. 6] Fig. Figure 6 schematically shows the first light emitted upwards from the front of the vehicle when it is upright. [ Fig. 7] Fig. Figure 7 shows the semi-trailer truck together with the other vehicle from above. [ Fig. 8] Fig. Figure 8 schematically shows, from above the vehicle body, a rear light unit of a different embodiment. [ Fig. 9] Fig. Figure 9 shows a semi-trailer truck according to another embodiment together with the other vehicle from above. [ Fig. 10] Fig. Figure 10 shows a semi-trailer truck according to a further embodiment together with the other vehicle from above. Description of embodiments

[0009] An embodiment of the present invention is described below with reference to the drawings. Unless otherwise specified, directions mentioned in the description, which include front-back, left-right, and top-bottom, are the same as directions with respect to a vehicle body. Reference numerals FR, UP, and LH, shown in the drawings, denote a front side of the vehicle body, a top side of the vehicle body, and a left side of the vehicle body, respectively. [Version]

[0010] Fig. Figure 1 is a side view of a semi-trailer truck 10 according to an embodiment of the present invention.

[0011] The semi-trailer vehicle 10 is a vehicle comprising a vehicle body frame 11, a power unit 12 which is mounted on the vehicle body frame 11, a front fork 14 which holds a front wheel 13 in a steerable manner, a swing arm 16 which holds a rear wheel 15, and a seat 17 for a driver.

[0012] The semi-trailer vehicle 10 is a vehicle on which the driver sits astride the seat 17. The seat 17 is positioned over a rear part of the vehicle body frame 11.

[0013] The vehicle body frame 11 comprises a head tube 18, which is provided at a front end section of the vehicle body frame 11, a front frame 19, which is arranged at a rear side of the head tube 18, and a rear frame 20, which is arranged at a rear side of the front frame 19. A front end section of the front frame 19 is connected to the head tube 18.

[0014] The seat 17 is attached to the rear frame 20.

[0015] The front fork 14 is mounted on the head tube 18 in such a way that it can be steered to the left and right. The front wheel 13 is mounted on an axle 13a, which is located at a lower end section of the front fork 14. A handlebar 21 for steering, which the rider grips, is attached to an upper end section of the front fork 14.

[0016] The swing arm 16 is mounted on a pivot shaft 22, which is mounted on the vehicle body frame 11. The pivot shaft 22 is a shaft that extends horizontally in one direction across the width of the vehicle. The pivot shaft 22 passes through a front end section of the swing arm 16. The swing arm 16 pivots up and down around the pivot shaft 22.

[0017] The rear wheel 15 is mounted on an axle 15a, which is located at a rear end section of the swing arm 16.

[0018] The power unit 12 is arranged between the front wheel 13 and the rear wheel 15 and is mounted on the vehicle body frame 11.

[0019] The power unit 12 is an internal combustion engine. The power unit 12 comprises a crankcase 23 and a cylinder 24, which houses a reciprocating piston. An exhaust device 25 is connected to an exhaust port of the cylinder 24.

[0020] An output from the power unit 12 is transferred to the rear wheel 15 by a drive power transmission element, which connects the power unit 12 and the rear wheel 15.

[0021] The saddle-mounted vehicle 10 further comprises a front fender 26, which covers the front wheel 13 from above, a rear fender 27, which covers the rear wheel 15 from above, footrests 28, on which the rider places his foot, and a fuel tank 29, which stores fuel to be used by the power unit 12.

[0022] The front fender 26 is attached to the front fork 14. The rear fender 27 and the footrests 28 are arranged on one side relative to the seat 17. The fuel tank 29 is mounted to the vehicle body frame 11.

[0023] The semi-trailer 10 comprises a body cover 30, which covers the vehicle body. The body cover 30 includes a front cover 31, which covers a front part of the vehicle body from the front and from the left and right sides, and an inner cover 32, which covers the vehicle body frame 19 from above. The front cover 31 has a cover shape that extends rearward in a width direction and top-bottom direction and is symmetrical with respect to the center of the vehicle width. A lighting unit 41, which emits headlight light, is attached to the front cover 31. The headlight light comprises a low beam (so-called dipped beam) and a high beam (so-called driving headlight). A rear light unit 45, which emits taillight light, is also attached to a rear part of the semi-trailer 10.The rear light is light that corresponds to the light of a taillight or a brake light. Additionally, the semi-trailer truck 10 is not subject to the [regulation / standard / etc.]. Fig. The configuration shown is limited, and the configuration and shape of each part and the like can be changed.

[0024] The lighting unit 41 is a unit that forms part of the lighting device of the e-riding vehicle 10 and is also referred to as a headlight unit or a front lighting unit. The lighting unit 41 is located in the e-riding vehicle 10 in a front-to-rear direction with respect to the center of the vehicle body, and in particular, it is located in front of a handlebar 21a and the vehicle body frame 11. The lighting unit 41 can be either a so-called handlebar mounting unit, which is attached to the handlebar 21, or a so-called frame mounting unit, which is attached to the vehicle body frame 11. The lighting unit 41 has the function of emitting light LA ​​to improve the visibility of the e-riding vehicle 10 to others outside the vehicle.

[0025] The light LA ​​uses light that has a small divergence angle, such as parallel or quasi-parallel light, and is therefore capable of providing higher brightness at a predetermined position, which is spaced away from the semi-trailer truck 10, than generally scattered light such as headlight light, taillight light, or turn signal light. The predetermined position is a position in a direction in which the light LA ​​is emitted and can be a position that is further away than the headlight light, the taillight, and the turn signal light, or a position outside an irradiation area with the headlight light, the taillight, and the turn signal light. The predetermined position includes a position of a driver of another vehicle 111 ( Fig. 5 and the like) with respect to the left- or right-leaning semi-trailer truck 10, as described later. This light LA ​​is light which corresponds to a “predetermined light” of the present invention.

[0026] Viewed from the front to the rear of the vehicle body, the direction of light emission LA is downwards when the vehicle is upright, and upwards when the vehicle is upright. Each direction will be described below.

[0027] It should be noted that the “downward direction when the vehicle is upright” can be understood as a direction outwards from the left and right sides of the vehicle and downwards on the vehicle when the vehicle is upright, and in the present embodiment the direction can be understood as a downward direction with respect to a height of a subsequently described reflector 61b (see Fig. 2) can be assumed. Furthermore, it can be assumed that the “upward direction when the vehicle is upright” is a direction outwards from the left and right sides of the vehicle and above the vehicle when the vehicle is upright, and in the present embodiment, the direction is an upward direction with respect to the height of reflector 61b. For the sake of simplicity, in the following description, the light LA ​​is appropriately referred to as “irradiation light LA”. <Fall, in welchem die Abstrahlrichtung mit dem Licht LA nach unten ist, wenn das Fahrzeug aufrecht steht>

[0028] Fig. Figure 2 is a diagram that schematically shows the lighting unit 41 from above the vehicle. The reference symbol LC in Fig. 2 indicates the center of the vehicle's width. Fig. Figure 2 also shows a configuration which involves irradiation / irradiation stop with the irradiation light LA, and this configuration will be described later.

[0029] The lighting unit 41 comprises a housing 42 (also referred to as a fairing) which extends outwards to the left and right with respect to the vehicle width center LC and, in the housing 42, includes a pair of left and right light sources 61a and a pair of left and right reflectors 61b which reflect light from each light source 61a as the irradiation light LA.

[0030] Each light source 61a is a known light source, such as an LED, and emits visible light. The light source 61a is not limited to a point light source and can be a planar light source in which a plurality of light-emitting elements are densely arranged to emit a planar light. The planar light source is, for example, a chips-on-board (COB) or surface-mount device (SMD) LED.

[0031] Each reflector 61b is formed in a reflecting mirror which emits light from the light source 61a in the direction of emission, including the irradiation light LA. Each reflector 61b incorporates a reflecting mirror in which a region capable of emitting the light LA, which has a predetermined width, in a desired direction is formed on a reflective surface in a circular paraboloid focused on the position of the light source 61a. Consequently, the reflector 61b emits the irradiation light LA, which comprises parallel light.If the illuminating light LA ​​is designed as a parallel light, it is easier to maintain a brightness at or above a certain level that is higher than the brightness of ambient light (corresponding, for example, to headlight light, taillight light, turn signal light, or ambient light), and it is easy for others to recognize the illuminating light LA. Additionally, the width of the parallel light can be appropriately defined.

[0032] Furthermore, the irradiated light LA ​​is not limited to parallel light and can, for example, be quasi-parallel light. Quasi-parallel light is divergent light in a state that closely approximates parallel light. Quasi-parallel light has a small divergence angle and can be emitted as light that exhibits brightness at or above a certain level up to a comparatively long distance in the same manner as parallel light. For example, the reflecting surface of any reflector 61b can be a reflecting surface resembling a circular paraboloid.

[0033] In the present embodiment, each reflector 61b and each light source 61a are attached to the lighting unit 41. Therefore, the direction of emission is fixed for each irradiation light beam LA from the semi-trailer truck 10.

[0034] In the present configuration, as in Fig. As shown in Figure 2, the reflectors 61b direct the irradiation light rays LA towards the left or right side, respectively, in a top view of the vehicle.

[0035] Fig. Figure 3 is a view that schematically shows the irradiation light LA ​​from the front of the vehicle.

[0036] Fig. Figure 3 shows a case in which the semi-trailer truck 10 is in an upright state, and a case in which the vehicle is in a tilted state to one of the left and right sides (also referred to as a cross-tilt state). The upright state is a state in which the vehicle body is upright perpendicular to a roadway GR (which corresponds to the road or the ground) and has a tilt angle θK = 90° (which corresponds to a cross-tilt angle = 0°) of the vehicle body with respect to the roadway GR. As in Fig. As shown in Figure 3, the light rays LA are directed towards the lower left side of the vehicle and towards the lower right side of the vehicle in the front view.

[0037] The direction of emission with each light beam LA is defined in this way, and accordingly, as in Fig. Figure 3 shows that the tilt angle θK to the left and right sides of the semi-trailer truck 10 is a predetermined angle θK1. Then, the direction of illumination with the illuminating light LA ​​on an outer side, which is opposite to the direction of tilt, can be closer to the horizontal direction than the direction of illumination in the upright state. The illuminating light LA ​​is simply directed towards others on the outer side who need to be aware of the semi-trailer truck 10 during a lateral tilt. Additionally, a distant location is illuminated with the illuminating light LA ​​in a simple manner.

[0038] Next, the irradiation light LA ​​and the predetermined angle θK1 of the semi-trailer truck 10 will be described in relation to a driving situation.

[0039] Fig. Figure 4 is a view which, from above, shows the driving situation in which a plurality of vehicles are driving.

[0040] Fig. Figure 4 shows an intersection (also called a road junction) 100 in which two roads intersect, together with surroundings, and a road which includes a lane 101A in which another vehicle 111 (hereinafter referred to as "the other vehicle 111") is traveling is referred to as "first road 101", while a road which intersects the first road 101 is referred to as "second road 102".

[0041] The semi-trailer truck 10 of the present embodiment is represented by a vehicle 10A located at the intersection 100. Vehicle 10A is located on the second road 102 and is about to turn left into lane 101A of the first road 101 (the lane along which the other vehicle 111 is traveling).

[0042] Fig. Figure 5 is a view which, from above, shows vehicle 10A together with the other vehicle 111. Fig. 5. Immediately before the left turn, the driver 21 of vehicle 10A is steered to the left-hand side while the vehicle is stopped, and vehicle 10A is tilted laterally on its left side (which corresponds to an inner side) by the predetermined angle θK1. To make the description clearer, Figure 5 shows... Fig. 5 only the light LA ​​on the outer side, which is opposite to the direction of inclination.

[0043] The predetermined angle θK1 is appropriately determined based on the inclination angle θK of vehicle 10A, which turns onto an orthogonal road. As in Fig. As shown in Figure 5, vehicle 10A emits the irradiation light LA ​​in a direction of an angle θ1, which corresponds to a direction towards the side at the front of the vehicle, a direction towards the side of the vehicle, and a direction towards the side at the rear of the vehicle in a top view of the vehicle body. This angle θ1 indicates the direction in which the irradiation light LA ​​is directed towards the driver of the other vehicle 111 when the lighting unit 41 is a handlebar mounting unit, the other vehicle 111 is at position P1, and a steering angle to the left turn is generated at the handlebar 21 of vehicle 10A, which is tilted laterally. Fig. Figure 2 shows that the angle indicates the direction towards the side at the rear of the vehicle in relation to vehicle 10A.

[0044] The direction of emission with the irradiation light LA ​​is downwards on the vehicle when the vehicle is upright, and towards the side at the rear of the vehicle, and accordingly, when the steering angle is generated during a left turn at the handlebar 21 of the vehicle, comprising the lighting unit 41, the irradiation light LA ​​is directed simply towards the driver of the other vehicle 111, in relation to vehicle 10A.

[0045] Depending on the defined angle θ1, it can be assumed that the direction of radiation with the irradiated light LA ​​is directed downwards towards the vehicle when the vehicle is upright, and either towards the side of the vehicle or towards the front of the vehicle. Position P1 has a separation distance d1 from vehicle 10A and is determined, based on simulations and experiments, to a position suitable for the other vehicle 111 in order to avoid contact with vehicle 10A.

[0046] If the lighting unit 41 is a frame mounting unit, the angle θ1 indicates the direction in which the irradiating light LA ​​is directed towards the driver of the other vehicle 111 when the other vehicle 111 is at position P1, and defines the direction of emission with the irradiating light LA ​​as the downward direction at the vehicle when the vehicle is upright, and as the direction towards the side at the front of the vehicle, the direction towards the side of the vehicle or the direction towards the side at the rear of the vehicle.

[0047] Here is the in Fig. 5. Other vehicle 111 shown is a vehicle traveling on the first road 101, and is a vehicle which may be a vehicle following vehicle 10A after vehicle 10A turns left.

[0048] Position P1, for example, is set to a position in which the other vehicle 111 can avoid vehicle 10A without contacting vehicle 10A, or to a position in which the other vehicle 111 can stop.

[0049] Consequently, in the vehicle's top view, the irradiated light LA ​​can be directed towards the driver of the other vehicle 111 at position P1. In this case, vehicle 10A is tilted to the left by the predetermined angle θK1, and accordingly, the irradiated light LA ​​can be emitted closer to a horizontal direction compared to the upright state, so that the irradiated light LA ​​can be emitted at a height at which the light can be easily perceived by the driver of the other vehicle 111.

[0050] Therefore, it is possible to enable the driver of the other vehicle 111, which may be the following vehicle, to detect the illumination light LA, and in other words, it is possible to enable the driver of the other vehicle 111 to notice the presence of vehicle 10A. Consequently, the driver of the other vehicle 111 can detect vehicle 10A, and the visibility of vehicle 10A is improved.

[0051] As in Fig. As shown in Figure 2, the semi-trailer truck 10 comprises an information acquisition device 81 and a vehicle control unit 82 as a configuration relating to the irradiation / irradiation stop with the irradiation light LA. The information acquisition device 81 is a device that detects information about each part of the semi-trailer truck 10. The information acquisition device 81 comprises at least one vehicle speed detection unit 81a, which detects the vehicle speed of the semi-trailer truck 10, and at least one tilt angle detection unit 81b, which detects the tilt angle θK of the semi-trailer truck 10 to the left and right sides.

[0052] The vehicle control unit 82 is a device that controls every part of the semi-trailer truck 10 and includes an irradiation control unit 82a, which controls the irradiation / irradiation stop with the irradiation light LA. In addition to a function for controlling the irradiation / irradiation stop with the irradiation light LA ​​based on the information obtained by the information acquisition device 81, the irradiation control unit 82a may have functions for controlling the switching on / off of the headlight, the switching on / off of a turn signal, the taillight, the brake light, and the like.

[0053] The irradiation control unit 82a performs a control operation to activate and illuminate the light source 61a only when the vehicle 10A is stopped, based on the vehicle speed of the vehicle 10A, and to emit the irradiation light LA. Consequently, the irradiation light LA ​​is emitted when the vehicle 10A is stopped. Therefore, as in Fig. As shown in Figure 5, it is possible to enable vehicle 10A, after turning right or left, to be easily recognized by the driver of the other vehicle 111, which may be the following vehicle, and it is easy to suppress a situation in which the irradiation light LA ​​is emitted when vehicle 10A is not stopped.

[0054] Additionally, the light LA ​​is emitted on the outer side towards the driver of the other vehicle 111, which may be the following vehicle after vehicle 10A turns right or left, so that the irradiation control unit 82a can only emit the light LA ​​on the outer side, which is the opposite side to the tilt direction. For example, the irradiation control unit 82a can specify the tilt direction using the tilt angle θK detected by the tilt angle detection unit 81b and can perform a control to emit the light LA ​​on the outer side and not emit the light LA ​​on the inner side.

[0055] Furthermore, the irradiation control unit 82a can perform a control to emit the irradiation light LA ​​only when the vehicle 10A is stopped and the tilt angle θK of the vehicle 10A is within a predetermined range. In this case, if the vehicle 10A is stopped and not in a laterally tilted state (correspondingly, if the tilt angle θK is outside the predetermined range), the irradiation light LA ​​can be prevented from being emitted.

[0056] Additionally, although the case has been described in which the irradiation light LA ​​is emitted only when the vehicle speed of vehicle 10A has come to a stop, control can be implemented to emit the irradiation light LA ​​even when vehicle 10A is in a low-speed state, preparing to turn right or left, in addition to when vehicle 10A is stopped. For example, the irradiation control unit 82a performs control to emit the irradiation light LA ​​only when the vehicle speed of vehicle 10A is less than or equal to a predetermined speed.The predetermined speed can be set to essentially include a speed less than or equal to the predetermined speed only when the vehicle is stopped, or the predetermined speed can be set to include the speed when the vehicle is in the low-speed state, in addition to when the vehicle is stopped. Since the low-speed state for the vehicle to turn right or left includes the illumination light LA, the illumination light LA ​​can be emitted when the vehicle 10A turns right or left during a lateral tilt, so an effect of improving the visibility of the vehicle 10A can be expected.

[0057] Furthermore, by setting the above predetermined speed to a suitable speed, it is possible to prevent the irradiation light LA ​​from being emitted while the vehicle is traveling in a high-speed zone where it will not turn right or left. Therefore, even if an occupant of another vehicle is in a position illuminated by the irradiation light LA ​​of vehicle 10A traveling straight ahead in the high-speed zone, it is possible to avoid a situation in which the occupant is illuminated by the irradiation light LA. <Wenn die Abstrahlrichtung mit dem Licht LA nach oben ist, wenn das Fahrzeug aufrecht steht>

[0058] Fig. Figure 6 is a view that schematically shows the irradiation light LA ​​from the front of the vehicle.

[0059] Fig. Figure 6 shows a case in which the semi-trailer truck 10 is in the upright state, and a case in which the semi-trailer truck 10 is tilted from side to side (also referred to as a transverse tilted state). As in Fig. As shown in Figure 6, the light rays LA are directed towards a right upper side of the vehicle or towards a left upper side of the vehicle in a vehicle front view.

[0060] By defining the direction of emission with each light beam LA in this manner, as in Fig. As shown in Figure 6, if the tilt angle θK of the semi-trailer truck 10 is the predetermined angle θK1, the direction of illumination with the light LA ​​on an inner side can be fixed in a tilting direction to be more horizontal than the direction of illumination in the upright state. Consequently, the illuminating light LA ​​is easily directed towards another person on the inner side who needs to be alerted to the semi-trailer truck 10 during a lateral tilt. As a result, a distant location is easily illuminated with the illuminating light LA.

[0061] Fig. Figure 7 shows a vehicle 10B immediately before a right turn at intersection 100, as the articulated vehicle 10 seen from above. The vehicle 10B is positioned on the first road 101 (an oncoming lane 101B to lane 101A) and is about to turn right onto the second road 102, which intersects the first road 101. Since the vehicle 10B is immediately about to turn right, the driver 21 is steered into the right-turn lane in a stopped position, and the vehicle 10B is tilted laterally on its right side (which corresponds to the inner side) at the predetermined angle θK1.

[0062] As in Fig. As shown in Figure 7, vehicle 10B emits the irradiation light LA ​​at an angle that corresponds either to a side direction at the front of the vehicle or to a side direction when viewed from above. This angle θA indicates the direction in which the driver of the other vehicle 111 perceives the irradiation light LA ​​when the lighting unit 41 is a handlebar mounting unit, the other vehicle 111 is in position PA, and a steering angle is generated at the handlebar 21 of vehicle 10B during a right turn. Fig. Figure 7 indicates that the direction is towards the side at the front of the vehicle in relation to vehicle 10B.

[0063] The direction of emission with the irradiation light LA ​​is set to the upward direction on the vehicle when the vehicle is upright, and the direction towards the side at the front of the vehicle, and accordingly the irradiation light LA ​​is directed in a simple way towards the driver of the other vehicle 111 in relation to the vehicle 10A when the lighting unit 41 is the handlebar mounting unit and even when the steering angle is generated on the handlebar 21 of the vehicle 10A during right or left turning.

[0064] Depending on the specified angle θA, it can be assumed that the direction of emission with the irradiation light LA ​​is upwards towards the vehicle when the vehicle is upright, and towards the side of the vehicle. Position PA has a separation distance dA from vehicle 10B and is determined, based on simulations and experiments, to a position suitable for the other vehicle 111 to avoid contact with vehicle 10A. If the lighting unit 41 is a frame-mounted unit, the angle θA indicates the direction in which the irradiation light LA ​​is directed towards the driver of the other vehicle 111 when the other vehicle 111 is at position PA.For example, the direction of emission with the irradiation light LA ​​is set to the upward direction on the vehicle when the vehicle is upright, and either the direction towards the side at the front of the vehicle or the direction towards the side of the vehicle.

[0065] Here is the in Fig. 7 other vehicle 111 shown is a vehicle traveling on the second road 102 into which vehicle 10B turns right, and this other vehicle may possibly become an oncoming vehicle of vehicle 10B after vehicle 10B turns right.

[0066] Position PA is, for example, set to a position in which the other vehicle 111 can avoid vehicle 10B without contacting it, or to a position in which the other vehicle 111 can be stopped. Consequently, the illuminating light LA, viewed from above, can be directed towards the driver of the other vehicle 111 at position PA. Furthermore, since vehicle 10B is tilted to the right by the predetermined angle θK1, the illuminating light LA ​​can be emitted near the horizontal direction, and the driver of the other vehicle 111 can be illuminated by the illuminating light LA ​​at a height where the light can be easily perceived by the driver.

[0067] Therefore, the driver of the other vehicle 111, which could potentially be the oncoming vehicle, can detect the illumination light LA ​​and notice vehicle 10B, thus improving the visibility of vehicle 10B. To make the description easier to understand, it shows Fig. 7 only the light LA ​​on the inner side in the direction of inclination.

[0068] As described above, the irradiation control unit 82a performs a control to emit the irradiation light LA ​​only when the vehicle 10B is stopped, so that the irradiation light LA ​​is emitted when the vehicle 10B is stopped. Therefore, as in Fig. Figure 7 shows that it is possible in a simple way to enable vehicle 10B to be recognized by the driver of the other vehicle 111, which may be the oncoming vehicle, after vehicle 10B turns right or left, and it is easy to suppress the situation in which the irradiation light LA ​​is emitted when vehicle 10B is not stopped.

[0069] Additionally, since the driver of the other vehicle 111, which may become the oncoming vehicle after vehicle 10B turns right or left, is illuminated with light LA ​​on the inner side, the driver can only be illuminated with light LA ​​on the inner side in the direction of inclination by the irradiation control unit 82a. For example, the irradiation control unit 82a specifies the direction of inclination using the inclination angle θK, which is detected by the inclination angle detection unit 81b, and can perform a control to emit light LA ​​on the inner side and not to emit light LA ​​on the outer side.

[0070] Furthermore, vehicle 10B may be a vehicle that is about to make a U-turn or is in the process of making one. In this case, if vehicle 10B is in a tilted position just before the U-turn, the driver of the other vehicle 111, which is traveling on the orthogonal second road 102, can see vehicle 10B.

[0071] Furthermore, the irradiation control unit 82a performs a control to emit the irradiation light LA ​​only when the vehicle speed of vehicle 10B is less than or equal to a predetermined speed and the tilt angle θK of vehicle 10B is within a predetermined range, so that the irradiation light LA ​​can be prevented from being emitted when vehicle 10B is stopped and not tilted laterally.

[0072] Additionally, the vehicle speed of vehicle 10B, which is less than or equal to the predetermined speed, is not limited to a case in which vehicle 10B is stopped and can be set to include a low-speed condition when vehicle 10B is turning right or left (including a U-turn). Consequently, it is possible to emit the illuminating light LA ​​while vehicle 10B is turning right or left at low speed or making a U-turn while tilted, and an effect of improving the visibility of vehicle 10B can be expected.

[0073] Furthermore, the irradiation control unit 82a can perform the control to emit the irradiation light LA ​​only when the vehicle 10B is stopped and the tilt angle θK of the vehicle 10B is within a predetermined range. In this case, the irradiation light LA ​​cannot be emitted if the vehicle 10B is stopped and not in a tilted state (correspondingly, if the tilt angle θK is outside the predetermined range).

[0074] Furthermore, when vehicle 10B is in the low-speed state in preparation to turn right or left, a control can be performed to emit the irradiation light LA. For example, the irradiation control unit 82a performs the control to emit the irradiation with the irradiation light LA ​​only when the vehicle speed of vehicle 10B is less than or equal to a predetermined speed, and the predetermined speed can be set to include speeds less than or equal to the predetermined speed essentially only when vehicle 10B is stopped. Additionally, the predetermined speed can be set to include the predetermined speed when vehicle 10B is in the low-speed state and not when vehicle 10B is stopped.The predetermined speed includes the low-speed condition when vehicle 10B turns right or left, and it is accordingly possible to emit the irradiation light LA ​​when vehicle 10B turns right or left while tilted laterally, so that the effect of improving the visibility of vehicle 10B can be expected.

[0075] Furthermore, by setting the predetermined speed above to a suitable speed, it is possible to prevent the emission of the irradiation light LA ​​while driving in a high-speed section where the vehicle is not making a right or left turn (including a U-turn). Therefore, even if an occupant of another vehicle is in a position illuminated by the irradiation light LA ​​of vehicle 10B traveling straight ahead in a high-speed section, it is possible to prevent the occupant from being irradiated by the irradiation light LA.

[0076] As described above, the lighting unit 41, which forms the lighting device, emits the irradiation light LA, which is capable of providing a higher brightness than the headlight and taillight at the predetermined position, which is spaced apart from the semi-trailer truck 10. The direction of emission of the irradiation light LA ​​is towards the side at the front of the vehicle, towards the side at the rear of the vehicle, and towards the side of the vehicle, and upwards or downwards when the vehicle is upright.Consequently, if the vehicle, which is the semi-trailer truck 10, is tilted to the left or right, the direction of emission of the illuminating light LA ​​is closer to the horizontal direction than when the vehicle is upright. Therefore, the illuminating light LA ​​is easily directed towards the other vehicle 111 or a pedestrian located within the area illuminated by the illuminating light LA. This allows others outside the vehicle to easily recognize the vehicle when it is tilted to the left or right.

[0077] Furthermore, by setting the direction of emission with the irradiation light LA ​​downwards on the vehicle when the vehicle is upright, and towards the side at the rear of the vehicle, it is possible to easily direct the irradiation light LA ​​towards the driver of the other vehicle 111, which may be the following vehicle after a right or left turn in relation to the own vehicle, if the steering angle during a right or left turn is generated at the handlebar 21 of the own vehicle, which is the semi-trailer 10, which includes the lighting unit 41, which is the handlebar mounting unit.In other words, if the steering angle is generated at the handlebar 21 of the articulated vehicle 10 during a right or left turn, and the articulated vehicle 10 is tilted to the left or right, the irradiated light LA ​​is directed in a simple manner towards the driver of the other vehicle 111, the pedestrian, or the like, who are on or around the opposite side to the direction of tilt.

[0078] Furthermore, by setting the direction of emission with the irradiation light LA ​​to an upward direction on the vehicle when the vehicle is upright, and towards the side at the front of the vehicle, the irradiation light LA ​​is simply directed towards the driver of the other vehicle 111, which may become the oncoming vehicle after a right or left turn in relation to the own vehicle, if the steering angle during the right or left turn is generated at the handlebar 21 of the own vehicle, which is the articulated vehicle 10, which includes the lighting unit 41, which is a handlebar mounting unit.In other words, if the steering angle is generated at the handlebar 21 of the articulated vehicle 10 during a right or left turn, and the articulated vehicle 10 is tilted to the left or right, the irradiating light LA ​​is directed in a simple manner towards the driver of the other vehicle 111 or the pedestrian who is in or around the direction of tilt.

[0079] Furthermore, the semi-trailer-mounted vehicle 10 includes the speed detection unit 81a, which detects the vehicle speed, and the irradiation light LA ​​is emitted only when the vehicle speed is less than or equal to the predetermined speed. According to this configuration, the irradiation light LA ​​can be emitted while the vehicle is stopped or turning right or left, and it can be prevented from being emitted while driving at a speed higher than the predetermined speed.

[0080] Additionally, the direction of illumination of the illuminating light LA ​​is fixed towards the side at the front of the vehicle, and the brightness of the illuminating light LA ​​is higher than that of the headlight and turn signal light at a predetermined position located away from the semi-trailer 10 in the direction of illumination of the illuminating light LA. According to this configuration, when the vehicle (the semi-trailer 10) is tilted to the left or right, the direction of illumination of the illuminating light LA ​​on the side at the front of the vehicle is closer to the horizontal direction than when the vehicle is upright, so that the predetermined light is easily directed towards the other vehicle or pedestrian around the vehicle.This allows others outside the vehicle to easily recognize the vehicle if it is tilted to the left or right. [Other embodiments]

[0081] The semi-trailer-mounted vehicle 10 according to another embodiment comprises the same configuration as in the embodiment above, except that the rear light unit 45 has the function of emitting irradiation light LA. Parts that differ from the embodiment above are described below, and the same configuration as in the embodiment above is indicated by the same reference numerals. Redundant descriptions of the embodiment above will be omitted where appropriate.

[0082] Fig. Figure 8 is a schematic view showing the rear light unit 45 from above the vehicle.

[0083] The rear light unit 45 comprises a housing 46 (also referred to as a fairing) which extends outwards to the left and right with respect to a vehicle width center LC, and, within the housing 46, includes a pair of left and right light sources 71a and a pair of left and right reflectors 71b which reflect light from each light source 71a as irradiation light LA.

[0084] Each light source 71a is a known light source such as an LED and emits visible light.

[0085] Each reflector 71b is formed in a reflective mirror which emits light from the light source 71a in a direction of radiation with the irradiation light LA. Each reflector 71b forms the irradiation light LA ​​into parallel or quasi-parallel light which has a small divergence angle, and the light can provide a higher brightness than headlight light, taillight light or turn signal light, which is scattered light at a predetermined position spaced away from the semi-trailer vehicle 10.

[0086] Each reflector 71b and each light source 71a is attached to the rear light unit 45. Therefore, the direction of emission is fixed with each illuminating light LA ​​from the semi-trailer truck 10. In the present configuration, as shown in Fig. As shown in Figure 8, each reflector 71b emits the irradiation light LA ​​to the side of the vehicle (comprising the front and rear sides) in the top view of the vehicle. In the other embodiment, viewed from a front-to-rear direction of the vehicle body, the direction of emission of the irradiation light LA ​​can be downward when the vehicle is upright, or upward when the vehicle is upright, and each case will be described. <Fall, in welchem die Abstrahlrichtung mit dem Licht LA nach unten ist, wenn das Fahrzeug aufrecht steht>

[0087] Fig. Figure 9 shows vehicle 10A, located at intersection 100, as the semi-trailer truck 10 together with the other vehicle 111 from above. Fig. 9, immediately before the left turn, the driver 21 of vehicle 10A is steered to the left-hand side in a stopped state, and vehicle 10A is tilted laterally on the left side (which corresponds to the inner side) by a predetermined angle θK1.

[0088] As in Fig. As shown in Figure 9, in the top view of the vehicle, vehicle 10A emits the irradiation light LA ​​in a direction of an angle θ1, which corresponds to one of the directions towards the side at the front of the vehicle, the direction towards the side of the vehicle, and the direction towards the side at the rear of the vehicle. This angle θ1 indicates a direction in which the driver of the other vehicle 111 perceives the irradiation light LA ​​when the other vehicle 111 is at position P1 in lane 101A, and Fig. Figure 8 represents the direction towards the side at the rear of vehicle 10A in relation to vehicle 10A. Depending on the specified angle θ1, the direction of emission of the irradiated light LA ​​is assumed to be either towards the side at the front of the vehicle or towards the side of the vehicle. Position P1 has a separation distance d1 from vehicle 10A and is determined, based on simulations and experiments, to a position suitable for the other vehicle 111 to avoid contact with vehicle 10A.

[0089] Consequently, in a configuration where the rear light unit 45 emits the illuminating light LA ​​downwards when the vehicle is upright, viewed from above the vehicle, the illuminating light LA ​​can be directed towards the driver of the other vehicle 111, which is located at position P1, which may be the following vehicle. In this case, since the vehicle 10A is tilted to the left by the predetermined angle θK1, the illuminating light LA ​​can be emitted closer to the horizontal direction on the right side, which is on an outer side, compared to the upright state, so that the illuminating light LA ​​can be emitted at a height that is easily perceived by the driver of the other vehicle 111.

[0090] Therefore, the illuminating light LA ​​can be directed towards the driver of the other vehicle 111, which may be the following vehicle, in such a way that the driver recognizes the illuminating light LA ​​and the vehicle 10A is easily perceived. This improves the visibility of vehicle 10A.

[0091] Since the irradiation light LA ​​is light which is directed to the rear in the left and right directions L and R of the vehicle body (see Fig. 8) The light LA ​​is not blocked by the occupant of vehicle 10A. This also improves the visibility of vehicle 10A. To make the description easier to understand, it shows Fig. 9 only the light LA ​​on the outer side, which is opposite to the direction of inclination.

[0092] The irradiation control unit 82a performs a control operation to drive and illuminate the light source 71a and to emit the irradiation light LA ​​only when the vehicle 10A is stopped, based on its speed, in the same manner as in the embodiment described above. This allows the driver of the following vehicle 111 to easily detect the vehicle 10A after it has turned right or left. It is simpler to suppress the emission of the irradiation light LA ​​when the vehicle 10A is not stopped. <Fall, in welchem die Abstrahlrichtung mit dem Licht LA nach oben ist, wenn das Fahrzeug aufrecht steht>

[0093] Fig. Figure 10 shows, from above, the vehicle 10B immediately before a right turn or a U-turn at the intersection 100 as the semi-trailer truck 10. Since the vehicle 10B is immediately before the right turn or the U-turn, the driver 21 is steered into the right-hand turning lane in a stopped state, and the vehicle 10B is tilted laterally on the right side (which corresponds to the inside side) at the predetermined angle θK1.

[0094] As in Fig. As shown in Figure 10, vehicle 10B, in a top view of the vehicle body, emits the irradiation light LA ​​in a direction with an angle θA, which corresponds to a direction towards the side at the front of the vehicle and a direction towards the side of the vehicle. This angle θA indicates a direction that allows the driver to perceive the irradiation light LA ​​when the other vehicle 111 is at position PA on the second road 102, which may become an oncoming vehicle after vehicle 10B turns right. Fig. Figure 10 represents a case in which the direction relative to vehicle 10B is towards the side at the front of the vehicle. Depending on the specified angle θA, the direction of emission with the irradiated light LA ​​is assumed to be towards the side of the vehicle. The position PA is at a separation distance dA, which corresponds to the distance from vehicle 10B, and is determined based on simulations and experiments to a position suitable for the other vehicle 111 in order to avoid contact with vehicle 10B.

[0095] As a result, in a configuration where the illuminating light LA ​​is emitted upwards from the rear light unit 45 when the vehicle is upright, viewed from above the vehicle, the illuminating light LA ​​can be directed towards the driver of the other vehicle 111, which is located at position PA and may potentially be the oncoming vehicle. In this case, the vehicle 10B is tilted to the left by the predetermined angle θK1, and accordingly, the illuminating light LA ​​can be emitted closer to the horizontal direction on the left side, which is the inner side, compared to the upright state, so that the illuminating light LA ​​can be emitted at a height that can be easily perceived by the driver of the other vehicle 111.

[0096] Therefore, the illuminating light LA ​​can be directed towards the driver of the other vehicle 111, which may be the oncoming vehicle, and the driver can see the illuminating light LA, so that vehicle 10B is easily perceived. This improves the visibility of vehicle 10B.

[0097] In this case as well, the irradiation control unit 82a performs a control operation to activate and illuminate the light source 71a only when vehicle 10B is stopped based on its vehicle speed, and to emit the irradiation light LA ​​in the same manner as in the embodiment described above. This allows vehicle 10B to be easily detected by the driver of the other vehicle 111, which may be the oncoming vehicle, after a left or right turn, and it is easier to suppress the situation in which the irradiation light LA ​​is emitted when vehicle 10B is not stopped.

[0098] Therefore, the rear light unit 45, which forms the lighting device, emits the illuminating light LA, which is capable of providing a higher brightness than the headlight light or the taillight light at a predetermined position spaced away from the semi-trailer truck 10. The direction of emission of the illuminating light LA ​​is towards the side at the front of the vehicle, towards the side at the rear of the vehicle, and towards the side of the vehicle, and either upwards or downwards when the vehicle is upright. Consequently, when the vehicle, which is the semi-trailer truck 10, is tilted to the left or right, the direction of emission of the illuminating light LA ​​is closer to the horizontal direction than the direction of emission when the vehicle is upright.The illuminating light LA ​​is simply directed towards the other vehicle 111 or the pedestrian who is located at a point illuminated by the illuminating light LA. As a result, various effects such as those of the embodiment above can be achieved, for example, enabling others outside the vehicle to easily recognize the vehicle when it is tilted to the left or right.

[0099] Furthermore, the direction of illumination of the illuminating light LA ​​is set to the side at the rear of the vehicle, and the brightness of the illuminating light LA ​​is higher than that of the taillight and the turn signal at a predetermined position, which is spaced from the semi-trailer 10 in the direction of illumination of the illuminating light LA. According to this configuration, when the vehicle, which is the semi-trailer 10, is tilted to the left or right, the direction of illumination of the illuminating light LA ​​is closer to the horizontal direction than when the vehicle is upright. The predetermined light is illuminated in a simple manner in the direction of the other vehicle or pedestrian around the vehicle.This allows others outside the vehicle to easily recognize the vehicle if it is tilted to the left or right.

[0100] Each of the embodiments described above merely illustrates one aspect of the present invention and can be modified as desired and applied to an extent that does not deviate from the core of the present invention.

[0101] For example, in each of the embodiments described above, it has been described that the direction of emission with the irradiation light LA ​​is one of the direction towards the side at the front of the vehicle, the direction towards the side of the vehicle and the direction towards the side at the rear of the vehicle, and either the upward direction or the downward direction when the vehicle is upright, and the embodiments are not limited thereto.In the present invention, the direction of emission with the irradiation light LA ​​is one from the direction towards the side at the front of the vehicle, the direction towards the side at the rear of the vehicle and the direction towards the side of the vehicle, and either the upward direction or the downward direction when the vehicle is upright, so that the semi-trailer truck 10 can be easily detected by the other vehicle or a pedestrian which is located in at least one direction from the semi-trailer truck 10.

[0102] Furthermore, in each of the embodiments described above, the vehicle control unit 82 can perform a control operation to change the direction of the irradiated light LA ​​depending on the tilt angle θK, which is detected by the tilt angle detection unit 81b. In this case, for example, the vehicle includes a movable mechanism by which each reflector 61b, 71b is movable, and the control unit 82 controls the movable mechanism and varies the direction of the irradiated light LA ​​so that the irradiated light LA ​​is horizontal depending on the tilt angle θK. According to this configuration, the direction of emission of the irradiated light LA ​​is easily changed in a direction in which the vehicle, which is a semi-trailer truck 10, is more easily perceived by others outside the vehicle, depending on its tilt angle to the left or right.The direction of emission of the illuminating light LA ​​is not limited to the horizontal direction and can also be a direction in which the vehicle, which is the semi-trailer truck 10, can be easily recognized by others outside the vehicle. Furthermore, the vehicle control unit 82 can variably control the direction of the illuminating light LA ​​in a front-to-back direction depending on the tilt angle θK in order to change the direction of emission of the illuminating light LA ​​in the direction in which the vehicle can be easily recognized by others outside the vehicle.

[0103] Furthermore, the configuration for irradiation with a pair of left and right irradiation light beams LA is not limited to the configuration of each of the embodiments described above, and the number and direction of irradiation light beams LA can be changed.

[0104] In addition, the semi-trailer-mounted vehicle to which the present invention is applicable is not applicable to the one in Fig. The invention is limited to the motorcycle shown in Figure 1, and is applicable to any e-riding vehicle comprising a vehicle body inclined to the left or right. Furthermore, a direction of light emission is an optical axis direction. [Configurations supported by the above embodiments]

[0105] The above embodiments support the following configurations.

[0106] (Configuration 1) Semi-trailer vehicle comprising: a lighting device wherein the lighting device emits predetermined light which is capable of providing a higher brightness than headlight light and taillight light at a predetermined position spaced away from the vehicle, and wherein a direction of emission with the predetermined light is at least one from a side direction at the front of the vehicle, a side direction at the rear of the vehicle and a side direction at the rear of the vehicle, and at least one from an upward direction and a downward direction when the vehicle is upright.

[0107] According to this configuration, if the vehicle, which is a semi-trailer truck, is tilted to the left or right, the direction of the predetermined light beam is closer to the horizontal than when the vehicle is upright. The predetermined light is then easily directed towards other vehicles or pedestrians around the vehicle. This allows others outside the vehicle to easily see the vehicle when it is tilted to the left or right.

[0108] (Configuration 2) Semi-trailer vehicle according to Configuration 1, wherein the direction of emission with the predetermined light is a downward direction on the vehicle when the vehicle is upright, and is in the direction of the side at the rear of the vehicle.

[0109] According to this configuration, if a steering angle is generated at the handlebars of the vehicle being driven during a right or left turn, which is the e-bike that includes the handlebar-mounted lighting device, the illuminating light is directed in a simple manner towards the driver of the other vehicle, which may be the following vehicle after a right or left turn in relation to the vehicle being driven.

[0110] (Configuration 3) Semi-trailer vehicle according to configuration 1 or 2, wherein the direction of emission with the predetermined light is a direction upwards on the vehicle when the vehicle is upright, and in a direction of at least one from the side at the front of the vehicle and the side of the vehicle.

[0111] According to this configuration, when the steering angle is generated at the handlebars of the vehicle being driven during a right or left turn, which is a saddle-mounted vehicle that includes the handlebar-mounted lighting device, the illuminating light is directed in a simple manner towards the driver of the other vehicle or the like, which may be the oncoming vehicle after a right or left turn in relation to the vehicle being driven.

[0112] (Configuration 4) Semi-trailer vehicle according to one of configurations 1 to 3, further comprising: a vehicle speed detection unit which detects a vehicle speed, wherein the predetermined light is emitted only when the vehicle speed is less than or equal to a predetermined speed.

[0113] This configuration makes it possible to emit the predetermined light when the vehicle is stopped or turning right or left, and to prevent the predetermined light from being emitted when the vehicle is traveling at a speed higher than the predetermined speed.

[0114] (Configuration 5) Semi-trailer truck according to one of configurations 1 to 4, further comprising: a tilt angle detection unit which detects a tilt angle of the semi-trailer truck to the left or right, and a control unit which varies the direction of the predetermined light depending on the tilt angle.

[0115] According to this configuration, the direction of emission of the predetermined light is easily changed to a direction in which others outside the vehicle can more easily perceive the predetermined light, depending on the tilt angle of the vehicle, which is a semi-trailer truck, to the left or right.

[0116] (Configuration 6) Semi-trailer vehicle according to configuration 1, wherein the direction of emission with the predetermined light is in the direction of the side at the front of the vehicle, and the predetermined light provides a higher brightness than headlight light and indicator light at a predetermined position which is spaced away from the vehicle in the direction of emission with the predetermined light.

[0117] According to this configuration, when the vehicle (a semi-trailer truck) is tilted to the left or right, the direction of the predetermined light beam is closer to a horizontal direction than when the vehicle is upright. This directs the light towards other vehicles or pedestrians around the vehicle, allowing others outside to easily see it when it is tilted.

[0118] (Configuration 7) Semi-trailer vehicle according to configuration 1, wherein the direction of emission with the predetermined light is in the direction of the side at the rear of the vehicle, and the predetermined light provides a higher brightness than taillight light and indicator light at a predetermined position which is spaced away from the vehicle, in the direction of emission with the predetermined light.

[0119] According to this configuration, when the vehicle (a semi-trailer truck) is tilted to the left or right, the direction of the predetermined light beam is closer to the horizontal than when the vehicle is upright. This directs the light towards other vehicles or pedestrians around the vehicle, making it easy for others outside to see it when it is tilted. Reference symbol list 10 semi-trailer truck 10A, 10B vehicle (satellite vehicle) 11 Vehicle body frame 21 handlebars 21a Handlebar 41 Lighting unit (lighting device) 45 Rear light unit (lighting device) 61a Light source 61b, 71b Reflector 81 Information Acquisition Device 81a Vehicle speed detection unit 81b Tilt Angle Detection Unit 82 Vehicle control unit (control unit) 82a Irradiation control unit 111 other vehicle LA irradiation light (predetermined light) LC Vehicle Width Center QUOTES INCLUDED IN THE DESCRIPTION

[0000] This list of documents cited by the applicant was automatically generated and is included solely for the reader's convenience. The list is not part of the German patent or utility model application. The DPMA accepts no liability for any errors or omissions. Cited patent literature

[0000] JP 2010-111132

[0003] JP 2023-059391

[0006]

Claims

[1] A semi-trailer vehicle comprising: a lighting device (45) wherein the lighting device (45) emits predetermined light (LA) which is capable of providing a higher brightness than headlight light and rear light light at a predetermined position spaced away from the vehicle, and wherein a direction of emission with the predetermined light (LA) is at least one from a side direction at the front of the vehicle, a side direction at the rear of the vehicle and a side direction at the side of the vehicle, and at least one from an upward direction and a downward direction when the vehicle is upright. [2] A semi-trailer vehicle according to claim 1, wherein the direction of emission with the predetermined light (LA) is a downward direction on the vehicle when the vehicle is upright, and is in the side direction at the rear of the vehicle. [3] Saddle-mounted vehicle according to claim 1, wherein the direction of emission with the predetermined light (LA) is an upward direction on the vehicle when the vehicle is upright, and is in the side direction at the front of the vehicle. [4] Semi-trailer-mounted vehicle according to any one of claims 1 to 3, comprising: a vehicle speed detection unit (81a) which detects a vehicle speed, wherein the predetermined light (LA) is emitted only when the vehicle speed is less than or equal to a predetermined speed. [5] Semi-trailer-mounted vehicle according to any one of claims 1 to 3, further comprising: a tilt angle detection unit (81b) which detects a tilt angle of the articulated vehicle to the left or right, and a control unit (82) which varies the direction of the predetermined light (LA) depending on the tilt angle. [6] A semi-trailer vehicle according to claim 1, wherein the direction of emission with the predetermined light (LA) is in the direction of the side at the front of the vehicle, and the predetermined light (LA) provides a higher brightness than headlight light and indicator light at a predetermined position which is spaced away from the vehicle in the direction of emission with the predetermined light (LA). [7] A semi-trailer vehicle according to claim 1, wherein the direction of emission with the predetermined light (LA) is in the direction of the side at the rear of the vehicle, and the predetermined light (LA) provides a higher brightness than the rear light and indicator light at a predetermined position which is spaced away from the vehicle in the direction of emission with the predetermined light (LA).

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