JP3742126B2 - Headlight adjuster - Google Patents

Description

[0001]
[Industrial application fields]
The present invention relates to a vertical screen for irradiation light distribution projection of a vehicle headlight, and more particularly to a headlight adjuster capable of adjusting the position of a cut line by visually observing the projection of the irradiation light distribution.
[0002]
[Prior art]
The headlight of a vehicle is required to accurately set various irradiation light distributions in order to minimize dazzling given to the driver of the oncoming vehicle. Irradiation light distribution includes “traveling beam” when there is no oncoming vehicle and “passing beam” when there is an oncoming vehicle. As shown in FIG. 4, the criticality of the irradiation region particularly in the latter “passing beam” Bd is shown. The position of the cut line 50 indicating a line is strictly required to face the irradiation area downward so as to be positioned below the horizontal optical axis Ah of the “traveling beam”, and becomes large for the driver of the oncoming vehicle. It has an anti-glare effect.
Therefore, the position of the cut line is strictly regulated, and the cut line 50 is formed in the headlight by interposing shielding members 51 and 52 as shown in FIG. The position of the light bulb 53 is appropriately moved back and forth so that the position of the cut line 50 can be appropriately adjusted to an appropriate position below the horizontal optical axis Ah of the “traveling beam”.
[0003]
By the way, the measurement of the irradiation light distribution of the “passing beam” is generally performed conventionally, as disclosed in “Irradiation light distribution measuring apparatus” described in Japanese Patent Publication No. 5-57533. This is done by a headlight tester that measures the horizontal and vertical deflections of the optical axis.
As shown in FIG. 6, the headlight tester includes a light receiving unit 60 including a condensing lens 55, a half mirror 56, a light distribution projection screen 57, and the like, and a light flux of irradiation light so that the light receiving unit faces the headlight. In order to detect and match the horizontal and vertical fluctuations of the optical axis of the irradiated light by the front-facing detection unit 58 that detects the center position and moves up and down or horizontally, and the photoelectric sensor group provided on the light distribution projection screen 57, respectively. It comprises a left-right rotation mechanism and a vertical rotation mechanism (not shown) provided in the light receiving section.
In the measurement of the irradiation light distribution of the “passing beam”, the horizontal optical axis and the vertical optical axis which are the reference from the irradiation light distribution of the “traveling beam” are set on the screen 57 by the following procedure, and then the “passing beam” The position of the cut line is measured. That is,
(1) The center height of the condenser lens 55 of the light receiving unit 60 is adjusted in advance to the reference height of the headlight, and the right and left lateral movement and right and left rotation are performed by the facing detection unit 58 to face the headlight. Corresponding to a vehicle that does not necessarily enter at a right angle with respect to the traverse rail of the light receiving unit 60, the vehicle is also directly opposed.
(2) Next, the “traveling beam” is turned on, the light receiving unit 60 is rotated in the vertical direction by the vertical rotation mechanism, the “traveling beam” is scanned in the vertical direction, and the reference horizontal line of the projection screen 57 is “running”. Align with the horizontal optical axis of the beam.
(3) Next, the light receiving unit 60 is rotated in the left-right direction by the left-right rotation mechanism, the “traveling beam” is scanned in the horizontal direction, and the reference vertical line of the projection screen 57 is set to be perpendicular to the “traveling beam”. Align with the optical axis.
(4) Next, in order to obtain the position of the cut line of “passing beam”, “traveling beam” is switched to “passing beam”.
(5) Next, the light receiving unit 60 is rotated up and down by the vertical rotation mechanism, and the “passing beam” is scanned along the reference vertical axis on the screen 57 to obtain the position of the cut line.
[0004]
Recently, the invention described in Japanese Patent Application No. 5-81454, “Headlight Tester with Natural Tracking Device” disclosed by the inventors of the present application has been disclosed below in order to improve the measurement of the complicated illumination distribution. . That is, as shown in FIG.
A large number of sensor groups 62 arranged vertically in a row in the vertical direction on the light receiving surface side of the support 61 for raising and lowering the light receiving unit, and a peak of sensor output generated by causing the sensor group to scan the light distribution pattern of irradiation light at right angles. A detection signal processing circuit for detecting a value and detecting a directly-facing position for the light-receiving unit to directly face the irradiation light; a tracking control unit including a dog and limit switches 63, 63, 63 (not shown); It is composed of. This is because, in the irradiation light distribution measuring device, the condenser lens 55 of the light receiving unit 60 is visually observed with respect to the irradiation light of the headlight in advance corresponding to the height and mounting width of the headlight every time the vehicle type is changed. Prior alignment work through the front-view finder 64 is required, and the alignment operations [(1) to (5)] must be repeated due to the complexity and inaccuracy of the previous alignment work. There is a problem and it has been proposed to solve this problem.
[0005]
[Problems to be solved by the invention]
According to any of the above-described inventions, in order to measure the position of the cut line of the “passing beam”, it is necessary to use a headlight tester that requires expensive and complicated handling shown in FIGS. Currently, 20,000 out of 83,000 certified factories are designated as designated factories and the tester facilities are required. Measurement at a small-scale workshop other than the designated factory and the position adjustment of the cut line are impossible.
The present invention has been made in view of the above-mentioned matters, and has conventionally been used for tests of headlight irradiation light intensity, irradiation optical axis, various irradiation light distributions, and the like and requires expensive and complicated handling. The purpose is to provide an inexpensive and easy-to-use headlight adjuster to replace the tester.
[0006]
[Means for Solving the Problems]
In order to achieve the above object, in the headlight tester, the irradiation light of the headlight is made incident on the condensing lens, projected onto the light distribution projection screen through the half mirror, and the optical axis of the irradiation light distribution is shaken. In the present invention, the vertical screen is directly opposed to the headlight, and markings indicating the upper and lower allowable ranges of the cut line are provided on the screen, and irradiation light distribution of “passing beam” is provided on the screen. Is directly projected and can be adjusted so that the cut line is located within the marking.
That is, a plate-like vertical screen that receives irradiation light from a headlight of a test vehicle placed on a horizontal test floor at a predetermined interval and is provided so as to be able to move left and right, move forward and backward, move up and down, and turn left and right; A laser oscillator for setting an irradiation center of a traveling beam suspended from the central portion of the screen to irradiate the beam center protrusion, and a vehicle-facing laser oscillator suspended from the central vertical upper portion of the screen, The present invention proposes a headlight adjuster provided with markings indicating an upper and lower permissible range of a cut line of a passing beam set downward with respect to a traveling beam having an irradiation center at a central portion of the screen.
The laser oscillator for setting the irradiation center is configured to have a point-shaped irradiation pattern, and the laser oscillator for direct facing is configured to have a point-shaped irradiation pattern.
The irradiation center setting laser oscillator is configured to have a linear irradiation pattern, and the linear pattern is configured to be variable horizontally or vertically. Instead of the direct-facing laser oscillator, the irradiation center setting It may be configured to be used for both facing and facing.
Further, the plate-like vertical screen may be configured as a wall-hanging type, or may be configured as a caster movable type.
[0007]
[Action]
With the above technical configuration, the vertical screen is provided so as to be able to traverse left and right, move forward and backward, and turn left and right with respect to a horizontal test floor, so that the axle of the test vehicle introduced to the horizontal test floor is the course for its introduction. Even if it deviates from the axis of the line, it can face the headlight of the vehicle with a predetermined distance.
Next, a laser oscillator for setting an irradiation center having a point-shaped irradiation pattern at the central portion of the vertical screen can be applied to the beam center protrusion of the headlight and is suspended from the screen. The horizontal and vertical optical axes of the illumination distribution are projected so as to pass through the central portion of the screen. Next, when the traveling beam is switched to a downward passing beam, the screen is provided with a marking of the upper and lower allowable range of the passing beam cut line, so that the position of the projected passing beam irradiation light distribution cut line position It is sufficient to check whether the cut line is located in the marking by visual inspection. If the cut line is out of the allowable range, the screwing position of the headlight bulb can be moved forward and backward. Can be set to the position of the cut line.
[0008]
【Example】
Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the drawings. However, unless otherwise specified, the dimensions, shapes, relative positions, and the like of the components described in this embodiment are merely illustrative examples, and are not intended to limit the scope of the present invention. Absent.
FIG. 1 is a perspective view showing a schematic configuration of a headlight adjuster according to the present invention, and FIG. 2 shows a situation in which the wall-mounted headlight adjuster shown in FIG. 1 faces a test vehicle introduced on a test floor. It is a perspective view shown. FIG. 3 is a perspective view showing a schematic configuration of a carrier movable headlight adjuster showing another embodiment.
[0009]
As shown in FIG. 1, the headlight adjuster of the present invention includes a vertical screen 10, vertical elevating mechanisms 12, 12, left / right traversing mechanism 14 a, left / right rotating mechanism 16, forward / backward moving mechanisms 17, 17, horizontal The test wall is composed of a vertical wall surface 19 perpendicular to a course line (not shown) and a mounting portion to the wall surface 19.
The vertical screen 10 is a plate-like vertical screen 11 that is opposed to the front surface of the headlight 29 of the test vehicle correctly placed on the course line with a predetermined interval L (1 m), A laser oscillator 20 for setting an irradiation center having a point-like irradiation pattern suspended from the central portion X of the vertical screen 11 so that the beam center projection 30 of the headlight can be irradiated, and an upper vertical portion of the central portion X A laser oscillator 24 for direct-facing having a point-like irradiation pattern suspended from Y, and a marking 28 indicating an upper and lower allowable range of a cut line of a passing beam having an irradiation center at the central portion X are configured.
The up and down lifting mechanisms 12 and 12 lift the vertical screen 10 in the directions of arrows G → H and G ← H while holding the vertical screen 10 vertically, and the left and right turning mechanism 16 moves the vertical screen 10 up and down lifting and lowering mechanisms 12 and 12. The gate-shaped arch 13 that is vertically supported via the wing is configured to be able to rotate in the directions of arrows A → B and A ← B.
[0010]
Further, as in another embodiment shown in FIG. 3, the headlight adjuster of the present invention may be configured to be a caster movable type.
In this case, the vertical screen 10 has a vertical arch 32 horizontally installed on a caster carriage 31 that can move up and down and move up and down and up and down mechanisms 12 and 12 for raising and lowering the screen vertically. The bar 15 can be traversed appropriately by left and right traversing mechanisms 14b, 14b that can traverse left and right.
[0011]
In use, it is checked whether the axis of the test vehicle M introduced and placed on the course line matches the right-angle vertical section of the vertical screen.
That is, as shown in FIG. 2, the laser oscillators 20 and 24 are turned on, and a right-angle vertical cut section 27 of the vertical screen is formed by the respective light beams 21 and 25. Subsequently, the beam light 21 is adjusted so as to irradiate the symbol mark 22 at the center of the vehicle by the left and right traversing mechanism 14a and the up and down lifting mechanisms 12 and 12. In this case, it is checked whether the vertical cut surface 27 passes through the point 26 deviated from the vehicle axis or passes through the point 23 of the axis part. When the vehicle passes through the point 23, the vehicle M faces the vertical screen. However, when the vehicle passes through the point 26, for example, the vehicle M does not face the vertical screen.
That is, the left and right turning mechanism 16 rotates in the arrow B direction, and the left and right transverse mechanism 14a corrects the position in the arrow E direction. Next, as shown in FIG. 1, the vertical screen 10 is moved to the front surface of the headlight 29 by the left / right traversing mechanism 14 a and the vertical lifting mechanisms 12, 12, and the beam light 21 is irradiated to the beam center protrusion 30 of the headlight 29. In addition, the distance to the front surface of the headlight is adjusted to a predetermined distance L by the forward / reverse mechanisms 12 and 12.
As described above, the vertical screen 10 can be directly opposed to the front surface of the headlight of the test vehicle M with a predetermined distance L.
[0012]
As described above, the beam center projection of the headlight 29 is irradiated with the beam light 21 having the dotted irradiation pattern from the irradiation center setting laser oscillator 20 suspended from the central portion X of the vertically opposed vertical screen 10. 30 (see FIG. 5), the horizontal optical axis of the traveling beam emitted from the headlight 29 onto the vertical screen coincides with Ah and the vertical optical axis coincides with Av. Therefore, when the traveling beam is switched to the passing beam, the irradiation light distribution of the passing beam is projected onto the vertical screen 10 as shown in 35, for example.
Thus, it is visually checked whether the cut line 36 of the projection irradiation light distribution 35 of the low beam is within the marking 28 indicating the upper and lower allowable range, and the cut line 36 is positioned within the marking. As shown in FIG. 5, the light bulb screwing portion 54 is adjusted back and forth.
[0013]
Instead of the direct-facing laser oscillator 24, the irradiation pattern of the laser oscillator 20 for setting the irradiation center is a linear irradiation pattern, and the irradiation pattern can be rotated 90 degrees horizontally or vertically. For example, when the vertical screen faces the vehicle, the irradiation pattern is made vertical to form the vertical cut surface 27, the vehicle symbol mark 22 is cut, and whether the vertical cut surface 27 passes through the point 23 or not. You may check it.
Alternatively, after allowing the vertical irradiation pattern to pass through the symbol mark, the irradiation pattern is switched to the horizontal irradiation pattern, so that the bisection point of the pattern projected on the front of the vehicle coincides with the symbol mark. I just have to work.
Next, in order to set the position of the vertical screen so that the irradiation light of the laser oscillator 20 can be irradiated to the beam center projection 30 of the headlight 29 of the vehicle facing directly, the vertical position is set by the horizontal linear irradiation pattern, and the vertical position is set. What is necessary is just to set a left-right position with a linear pattern.
[0014]
【The invention's effect】
According to the present invention, the following effects can be obtained.
The screen for projecting the light distribution of the headlights is vertically formed with respect to the course line of the horizontal test floor, and can be moved up and down, left and right, and left and right. The work of facing the screen to the headlight can be performed with a reliable and simple operation.
In addition, since the beam center projection of the headlight that directly faces the beam light for setting the irradiation center having the point irradiation pattern from the laser oscillator is irradiated, the intersection of the “traveling beam” with the horizontal and vertical optical axes is set to the vertical. It can be set at the central part of the screen, and the irradiation light distribution of the low beam is also projected corresponding to the traveling beam, and the quality of the low beam cut line can be checked by marking that indicates the upper and lower allowable range of the cut line. .
Since the marking indicating the upper and lower permissible range of the cut line of the distribution light distribution of the “passing beam” is provided in advance, the conventional headlight tester is expensive and complicated for the cut line of the headlight of the test vehicle by visual inspection. Direct visual check and adjustment without using
[Brief description of the drawings]
FIG. 1 is a perspective view showing a schematic configuration of a wall-mounted headlight adjuster according to the present invention.
FIG. 2 is a perspective view showing a situation in which the vertical screen of FIG. 1 is directly opposed to a test vehicle.
FIG. 3 is a perspective view showing a schematic configuration of a caster type headlight adjuster according to another embodiment of FIG. 1;
FIG. 4 is a diagram illustrating a cut line of irradiation light distribution of a passing beam of a headlight.
FIG. 5 is a cross-sectional view showing a configuration of a headlight.
FIG. 6 is a cross-sectional view of a main part showing a configuration of a headlight tester conventionally used.
FIG. 7 is a diagram showing a configuration of a proposal made to prevent complication of the facing operation of the headlight tester of FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 ... Vertical screen 11 ... Plate-shaped vertical screen 12 ... Vertical raising / lowering mechanism 14a, 14b ... Left-right traversing mechanism 15 ... Horizontal bar 16 ... Left-right rotation mechanism 17 ... Forward / backward moving mechanism 19 ... Vertical wall surface 20 ... Laser oscillator for setting irradiation center 21, 25 ... Beam light 27 ... Vertical cut surface 28 ... Marking 29 indicating the upper and lower permissible range ... Headlight 30 ... Beam center projection 24 ... Front facing laser oscillator

Claims (6)

A plate-like vertical screen that receives irradiation light from a headlight of a test vehicle placed on a horizontal test floor at predetermined intervals, and is provided so as to be able to move left and right, move forward and backward, move up and down, and turn left and right, and a headlight beam A laser oscillator for setting an irradiation center of a traveling beam suspended from a central portion of the screen to irradiate a center protrusion, a laser oscillator for vehicle facing that is suspended from a central vertical upper portion of the screen, and A headlight adjuster characterized by comprising markings indicating a vertical allowable range of a cut line of a passing beam set downward with respect to a traveling beam having an irradiation center at a central portion of the screen. 2. The headlight adjuster according to claim 1, wherein the irradiation patterns of the irradiation center setting laser oscillator and the direct-facing laser oscillator have a point irradiation pattern. 3. The headlight adjuster according to claim 1, wherein the facing laser oscillator has a point-like irradiation pattern. A plate-like vertical screen that receives irradiation light from a headlight of a test vehicle placed on a horizontal test floor at predetermined intervals, and is provided so as to be able to move left and right, move forward and backward, move up and down, and turn left and right, and a headlight beam A laser oscillator that serves both for setting and irradiating the center of the traveling beam that is suspended at the center of the screen to irradiate the center projection, and downward with respect to the traveling beam having the center of irradiation at the center of the screen A headlight adjuster characterized in that a marking indicating the upper and lower permissible range of the set cross beam cut line is provided, and the laser oscillator is configured so that the linear irradiation pattern can be varied horizontally or vertically. 5. The headlight adjuster according to claim 1, wherein the plate-like vertical screen is configured to be wall-mounted. 5. The headlight adjuster according to claim 1, wherein the plate-like vertical screen is configured to be caster movable.

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