JPH0216258Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device for detecting a unit mileage of a vehicle, which is necessary for road surface management work, for example.

There are various types of road surface management work. For example, a conical road sign tube is placed on a road under construction.
To ensure safety, especially on expressways, the road sign tubes are dropped manually or mechanically at predetermined intervals while the vehicle is running. Alternatively, white lines representing road traffic zones are drawn at predetermined intervals, and this drawing work is usually done while driving on a highway.

Therefore, in these work vehicles, it is necessary to detect and extract the signal for each unit travel distance for the worker or the work mechanism.

Conventionally, for example, a mechanism has been used in which a work vehicle is equipped with a driven wheel separate from the wheels and a unit mileage is calculated from the number of revolutions of the driven wheel, but this is complicated and expensive.

The present invention was developed in view of the above circumstances, and its purpose is to provide an inexpensive unit mileage detection device for automobiles that has a simple structure, can accurately detect any unit mileage. This is what I am trying to do.

Hereinafter, one embodiment of the present invention will be described based on the drawings. In the figure, reference numeral 1 denotes a transmission connected to the engine, and a speed/distance totalizer drive system 2 is branched and provided on the output side of the transmission. This extracts the rotation of the output shaft of the transmission 1 and converts it into rotation at a certain ratio to rotate the drive shaft of the speedometer 3 provided on the instrument panel.
The speedometer 3 is, for example, a magnetic speedometer that rotates a pointer 4 in proportion to the number of rotations of a drive shaft. Also,
The speedometer 3 is equipped with a distance integration scale 5,
A rotary shaft is rotated from the drive shaft via a worm gear, and the total travel distance is displayed by integrating the number of rotations. The combination of the speed instruction section and the distance integration mechanism section is well known. Particularly in Japan, the relationship between the rotation of the drive shaft of the speedometer 3 and the indication is set at 60Km/H = 637 rpm for large and ordinary vehicles, so the distance integration scale 5 indicates that the rotation axis is 637 rpm.
The reduction ratio is created so that 637 rotations will indicate 1 km. A constant velocity drive mechanism 6 is branched and provided in the middle of the speed/distance totalizer drive system 2 configured in this manner. That is, using the rotation of the rotation axis of the distance integration scale 5 as a driving source,
Gear box 7 that accommodates gears that rotate in the same driven manner
and a reduction gear box 8 that accommodates a reduction gear that extracts the rotation of the gear and reduces it to a predetermined rotation speed. The output shaft of this constant velocity drive mechanism 6 has a second
A rotating disk 9 as shown in the figure is fitted. On the rotating disk 9, first to fifth pitch circles _n1 to _n5 are drawn concentrically at equal intervals from the center point, and the first pitch circle, which is the innermost pitch circle, is drawn concentrically at equal intervals from the center point. One through hole 10a on circle n ₁ , second pitch circle n ₂
There are two through holes 10 on the top with a distance of 180° from each other.
b, 10b, three through holes 10c, 10c, 10 are spaced apart from each other by 120° on the third pitch circle _n3 .
c. On the fourth pitch circle _n4 , there are four through holes 10d spaced apart from each other by 90 degrees... On the outermost fifth pitch circle _n5 , there are four holes spaced apart from each other by 60 degrees. Six through holes 10e... are respectively formed. This means that the distance traveled by a car is 10m, 15m, 20m,
It is set to obtain detection signals in units of 30m and 60m. That is, since the rotation axis of the distance integration scale 5 indicates 1 km with 637 revolutions, the speed reduction ratio i of the constant velocity drive mechanism 6 is set so that the rotating disc 9 rotates once when the car travels 60 m. is obtained from the following equation.

637/1000×1/i=1/60 i=38.22 In other words, by setting the reduction ratio 38.22 of the constant velocity drive mechanism 6 in one or several stages, the rotating disk 9
When it rotates once, the car has traveled 60 meters. This is the hole 1 on the first pitch circle n ₁ above.
This is equivalent to returning 0a to the same position. Since two through holes 10b, 10b are bored on the second pitch circle _n2 , the distance between each through hole 10b, 10b is 30 m.
This corresponds to the number of miles traveled. Similarly, three through holes 10c, 10c, 10c are bored on the third pitch circle _n3 , so the distance between each through hole 10c, 10c corresponds to a distance of 20 m, Each through hole 10 on n ₄
The distance between d and 10d corresponds to a distance of 15 m, and the distance between the through holes 10e and 10e on the fifth pitch circle _n5 corresponds to a distance of 10 m. On the other hand, reference numeral 11 in the figure is an optical detection mechanism, which includes a mounting tool 12 bent into a substantially U-shape extending from both sides of the rotating disk 10, and a mounting tool 12 on both sides of the mounting tool 12 facing each other. a pair of light-emitting elements 13 and light-receiving elements 14 that are attached to each other; a moving body 15 that moves the fixture 12 in the radial direction of the rotating disk 10; and the light-emitting and light-receiving elements 1.
A photoelectric switch 16 electrically connected to 3 and 14
It consists of. The moving body 15 may be moved manually or automatically.
Further, the photoelectric switch 16 is electrically connected to a signal processing device (not shown).

As the automobile travels, the constant velocity drive mechanism 6 branches the driving force of the speed/distance totalizer drive system 2 to drive the rotary disk 9 to rotate at a constant velocity relative to the distance traveled. If the light emitting element 13 and the light receiving element 14 of the optical detection mechanism 11 are positioned to face the second pitch circle _n2 , for example, each through hole 10 on the second pitch circle _n2
b, 10b can be detected. That is, these through-holes 10b, 10b are connected to the light emitting element 13 and the light receiving element 14 of the optical detection mechanism 11 every time the rotating disk 9 rotates 180 degrees.
, and light passes through it. The photoelectric switch 16
obtains a detection signal and sends the signal to a signal processing device. Since there are two detection signals during one revolution of the rotary disk 9, the signal processing device performs a predetermined process every time the car travels 30 meters.

If you want to get a detection signal every time the car travels 60 meters, use the first pitch circle n ₁ , and if you want to get a detection signal every time the car travels 20 meters, use the third pitch circle.
The light-emitting element 13 and the light-receiving element 14 may be opposed to each other at the pitch circle n ₃ for every 15 m, the fourth pitch circle n ₄ for every 10 m, and the fifth pitch circle n ₅ for every 10 m.

Furthermore, by changing the reduction ratio of the constant velocity drive mechanism 6,
Alternatively, by changing the interval between the holes in each of the pitch circles _n1 to _n5 , it is possible to receive detection signals for each different unit traveling distance.

As explained above, according to the present invention, the constant velocity drive mechanism extracts driving force from the drive system of the speed/distance totalizer, rotates the rotating disk at a constant speed with respect to the distance traveled, and draws the image on the rotating disk. A plurality of through holes are provided at positions corresponding to different unit travel distances along a plurality of concentric circles, and these through holes are detected by a pair of light emitting elements, light receiving elements, and photoelectric switches, and a signal corresponding to the unit travel distance is detected. Since the structure is replaced by , the unit traveling distance can be detected reliably with a relatively simple structure, and the workability is improved.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, and FIG. 1 is a schematic configuration diagram of a unit mileage detecting device for an automobile.
The figure is a front view of the rotating disk. 2...Speed/distance totalizer drive system, 6...Constant velocity drive mechanism, 9...Rotating disk, _n1 , _n2 , _n3 , _n4 , _n5 ...
...(first to fifth) concentric circles, 10a, 10
b, 10c, 10d, 10e...through hole, 11...
Optical detection mechanism, 12... Fixture, 13... Light emitting element, 14... Light receiving element, 15... Moving body, 16...
...Photoelectric switch.

Claims (1)

[Scope of utility model registration request] A constant-velocity drive mechanism that branches off the driving force from the drive system of a speed/distance totalizer installed in a car and attenuates it to a predetermined constant rotation speed based on the vehicle's travel distance; a rotating disk forming a shape, a plurality of through holes drilled on a plurality of concentric circles drawn on the rotating disk at positions corresponding to different unit travel distances of the automobile, and a plurality of through holes formed on both sides of the rotating disk. A mounting fixture bent into an extending substantially U-shape, a pair of light emitting element and light receiving element mounted opposite to each other on both sides of the mounting fixture, and this mounting fixture connected to the above mounting fixture. a moving body that moves the rotary disk in the radial direction of the rotating disk, and a photoelectric switch that is electrically connected to the light emitting element and the light receiving element and that optically detects the through hole interval and converts it into a signal corresponding to a unit traveling distance. A unit mileage detection device for an automobile, characterized in that: