ISO 12509:2023 土工機械および不整地トラック — 照明、信号灯、標識灯、および反射板 | ページ 6

3.1.1

zero Y plane

vertical plane which passes through the longitudinal centreline of the machine

[SOURCE:ISO 6746-1:2003, 3.1.1]

3.1.2

ground reference plane

GRP

plane on which the machine is placed for measurements: in the case of the base machine, a hard, level surface; in the case of equipment and attachments, either a hard, level surface or compacted earth

[SOURCE:ISO 6746-1:2003, 3.2, modified — Note 1 to entry not included.]

3.1.3

extreme outer edge

plane parallel to the zero Y plane (3.1.1) of the machine and touching its lateral outer edge on either side of the machine, disregarding the projection of tyres near the point of contact with the ground reference plane (3.1.2) and connections for tyre-pressure gauges, the projection of any anti-skid device mounted on the wheels, of rear-view mirrors, and of side direction-indicator lamps (3.1.5) , front and rear position lamps and stopping lamps

3.1.4

overall width

distance on Y coordinate between two Y planes passing through the extreme outer edge (3.1.3) of the machine on both sides of the zero Y plane (3.1.1)

3.1.5

lamp

device designated to illuminate the road (3.1.16) or ground (lighting) or to emit a light signal (light signalling)

Note 1 to entry: Marking light is similarly regarded as a lamp.

3.1.5.1

grouped

lamps (3.1.5) which have separate illuminating surfaces (3.1.7, 3.1.8) and separate light sources, but a common lamp body

Note 1 to entry: See Table 4-1.

3.1.5.2

combined

lamps (3.1.5) which have separate illuminating surfaces (3.1.7, 3.1.8) , but a common light source and a common lamp body

Note 1 to entry: See Table 4-1.

3.1.5.3

reciprocally incorporated

lamps (3.1.5) which have separate light sources (or a single light source operating under different conditions), totally or partially common illuminating surfaces (3.1.7, 3.1.8) and a common lamp body

Note 1 to entry: See Table 4-1.

3.1.6

reflex reflector

device which, by the reflection of light emanating from a light source not connected to the machine, is used to indicate the presence of a machine or to identify a specific part of a machine to an observer near the source

3.1.7

illuminating surface

<lighting device> orthogonal projection of the full aperture of a reflector in a transverse plane

Note 1 to entry: If the lighting device has no reflector, the definition of the illuminating surface of a signalling device applies. If the lamp lens(es) extend(s) over part only of the full aperture of the reflector, then the projection of that part only is taken into account.

Note 2 to entry: In the case of a dipped-beam headlamp, having a screened light source giving a defined cut-off, the illuminating surface is limited by the apparent trace of the cut-off on to the lens. If the reflector and glass are adjustable relative to one another, the mean adjustment is preferred.

3.1.8

illuminating surface

<signalling device> orthogonal projection of the lamp (3.1.5) in a plane perpendicular to its reference axis (3.1.10) and in contact with the exterior light-emitting surface (3.1.12) of a lamp

Note 1 to entry: This projection is bounded by the edges of screens situated in this plane which allows only 98 % of the total luminous intensity of the light to persist in the reference axis direction.

3.1.9

reflective surface

reflex reflector surface in a plane perpendicular to the reference axis (3.1.10) and bounded by planes on the outer edges of the light projection and parallel to this axis

3.1.10

reference axis

characteristic axis of the light signal for use as the reference direction (α = 0°, β = 0°) for photometric measurements and when fitting the lamp (3.1.5) on the machine

3.1.11

reference centre

intersection of the reference axis (3.1.10) with the light-emitting surface (3.1.12)

3.1.12

light-emitting surface

all or part of the exterior surface of the transparent lens that encloses the lighting and light signalling devices and conforms to certain defined photometric and colourimetric conditions

3.1.13

tell-tale

optical signal that when illuminated indicates actuation or deactivation of a machine function, a correct or defective functioning or condition, or a failure to function

3.1.13.1

operational tell-tale

tell-tale (3.1.13) which informs the operator whether a lighting or light signalling device or system that has been actuated is operating correctly or not

3.1.13.2

circuit-closed tell-tale

tell-tale (3.1.13) which informs the operator whether a lighting or light signalling device or system has been switched on but not whether a lighting is operating correctly or not

3.1.14

geometric visibility

specified angles which define the solid angle in which the apparent surface (3.1.15) of a lamp (3.1.5) or reflex reflector (3.1.6) is visible

Note 1 to entry: See Figure 3-1.

Note 2 to entry: The solid angle is determined by the segments of a sphere in which the centre coincides with the reference centre (3.1.11) of the lamp (3.1.5) and the equator is parallel to the ground reference plane (3.1.2) . These segments are determined in relation to the reference axis (3.1.10) . The horizontal angles correspond to the longitude and the vertical angle to the latitude. The horizontal angles are β₁ corresponding to longitude outboard, and β₂ corresponding to the longitude inboard, and the vertical angles are α₁ corresponding to the up latitude and α₂ corresponding to the down latitude (see data sheet diagram in Annex C).

Figure 3-1 — Example of geometric visibility showing directions of observation and apparent surfaces

Key

1	direction of observation longitude inboard
2	direction of observation longitude outboard
3	apparent surface longitude inboard
4	apparent surface longitude outboard

3.1.15

apparent surface

orthogonal projection of the light-emitting surface (3.1.12) in a plane perpendicular to a specified direction of observation

Note 1 to entry: See Figure 3-1.

3.1.16

road

public traffic area for use by automotive vehicles for travel or transportation

Note 1 to entry:Public traffic area does not include the sites of temporary road works (for example, for repairs, maintenance, alterations, improvements, installations, or any other works to, above or under a road, including works to road equipment lighting, barriers, walls, etc.) or roads not open to the public (for example, on new housing and industrial developments), or on which public traffic is not permitted.

[SOURCE:ISO 17253:2014, 3.2]

3.1.17

travel on the road

travelling on the road

use of machines on the road (3.1.16) (for example, travelling between work sites, to and from the site of normal storage, travelling for refuelling of the machine) for purposes other than intended operation

Note 1 to entry: The crossing of a road (3.1.16) in order to carry out job site work can be considered travelling on the road.

[SOURCE:ISO 17253:2014, 3.3, modified — The term was originally"driving on the road" and Note 1 to entry has been added.]

3.1.18

wheel tread/track gauge

distance on Y coordinate between two Y planes passing through the mid-width of the sprocket teeth or tyre centreline as appropriate

3.1.19

emergency braking signal

signal to indicate to other road users and exposed persons to the rear of the machine that a high retardation force has been applied to the machine relative to the prevailing road conditions