JPH06202731A - Position detector for truck - Google Patents

Abstract

PURPOSE:To detect the position of a truck without providing any members on the running route. CONSTITUTION:The front part of a truck 3 is provided with a detector 5 having a transmitter which transmits a signal of light, a radio wave, an acoustic wave, or the like and a receiver which receives the signal so that its signal line is inclined to the going direction of the truck 3, and a reflection plate 10 which reflects the signal is provided in the front end of the running route for the truck 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle position detecting device.

[0002]

2. Description of the Related Art Conventionally, the following types of position detecting devices are known. That is, it is known that a limit switch is provided on a truck, and a dog (cam) that comes into contact with a contact of the limit switch is provided on the floor surface of the traveling path of the truck. With such a configuration, when the truck passes the position where the dog is provided, the contact of the limit switch hits the dog and is swung (moved), so that the truck is positioned at the dog position. It is possible to detect that.

[0003]

Disadvantages of the Prior Art The conventional position detecting device has the following disadvantages. That is, since the dog was provided on the floor in the middle of the traveling path, care must be taken so that the dog does not collide with other members provided on the carriage,
Further, there is a drawback that the dog protruding from the floor surface of the traveling path becomes an obstacle during cleaning or the like.

[0004]

[Means for Resolving the Disadvantages] The invention according to claim 1 employs the following means in order to solve the disadvantages. According to the invention of claim 1, a detector having a transmitter for transmitting signals such as light, radio waves and sound waves and a receiver for receiving the signals is provided in a front portion of the truck, and the signal path is directed to the traveling direction of the truck. Is provided so as to be inclined, and a reflecting plate that reflects the signal is provided in front of the traveling path of the carriage.

[0005]

The invention of claim 1 has the following effects. When the detector receives the reflection signal from the reflector, it is possible to detect that the carriage is at the position where the reflection signal from the reflector is received. And
Of particular note is that the detector is installed so that its signal path is inclined with respect to the direction of travel of the dolly. It is possible to detect a position, and by providing a plurality of reflectors, one detector can detect a plurality of positions corresponding to the number of reflectors. Is Rukoto. Then, based on the position detection signal of the detector, the carriage can be braked to decelerate or stop.

[0006]

According to a second aspect of the present invention, in the front part of the trolley,
A detector having a transmitter for transmitting signals such as light, radio waves, sound waves and a receiver for receiving the signals is provided so that its signal path is inclined with respect to the traveling direction of the carriage,
A reflecting plate for reflecting the signal from the detector is provided at the rear of the dolly. The operation is the same as that of the invention of claim 1.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below based on two embodiments shown in the drawings. In these examples, the same members are designated by the same reference numerals.

Embodiment 1 (see FIGS. 1 and 2) In this Embodiment 1, the front means the right side of FIG. 1, the rear means the left side of FIG. 1, the left means the upper side of FIG. 1, and the right means the same figure. The lower side. A pair of guide rails 2 are laid on the floor so that their longitudinal directions are oriented in the front-rear direction.
The carriage 3 is allowed to run in either the front or rear direction.

The bracket 6 at the front of the carriage 3 is provided with a light
A detector 5 (for example, a reflection type photoelectric switch) having a transmitter for transmitting signals such as radio waves and sound waves and a receiver for receiving the signals tilts the signal path to the left and right with respect to the traveling direction of the carriage 3. It is provided so that The detector 5 is horizontally swingable when the lock mechanism (not shown) is released with respect to the bracket 6, and the direction can be changed. The signal path of the detector 5 may be tilted in the vertical direction with respect to the traveling direction of the carriage 3.

Two brackets 9 are provided on the front floor surface of the front end of the guide rail 2 so as to be aligned in the left-right direction, and these brackets 9 have a first reflecting plate 10 and a first reflecting plate 10 for reflecting the signal of the detector 5. Two reflectors 11 are provided.
The reflection plates 10 and 11 are horizontally swingable when the lock mechanism (not shown) is released from the bracket 9, and the direction can be changed. As shown in FIG. 1, when the carriage 3 is in the position shown by the solid line, the first reflector 10 reflects the signal of the detector 5, and when the carriage 3 is in the position shown by the alternate long and short dash line, the second reflection The plate 11 is adapted to reflect the signal of the detector 5. When the detector 5 receives the reflected signal from the first reflector 10, the trolley 3 is braked based on the received signal to decelerate, and the detector 5 detects the reflected signal from the second reflector 11. When the vehicle 5 receives it, the carriage 3 is stopped based on the received signal. As is clear from this description, since the detector 5 is provided so that its signal path is inclined with respect to the traveling direction of the carriage 3, by providing two or more reflectors 10 and 11, A single detector 5 provided on the carriage 3 can detect a plurality of positions of the carriage 3 corresponding to the number of the reflection plates 10 and 11.

The detector 5, the first reflecting plate 10, and the second
By changing the direction of the reflector 11, the distance between the carriage 3 and the reflectors 10, 11 when the detector 5 receives the reflected signals from the first reflector 10 and the second reflector 11 can be simplified. Can be changed.

A detector 5 is also provided in the rear part of the carriage 3 in a state similar to that of the front part, and a first reflector 10 and a second reflector 11 are provided on the rear floor surface at the rear end of the guide rail 2, It is provided similarly to the first reflector 10 and the second reflector 11 in the front part. Rear detector 5 and rear first reflector 10
The action of the second reflector 11 is also the same as described above.

Embodiment 2 (see FIG. 3) In this Embodiment 2, the front means the right side of FIG. 3, the rear means the left side of FIG. 3, the left means the upper side of FIG. 3, and the right means the lower side of FIG. Say. In the second embodiment, although not shown, the guide rail 2 is endless like a track for track and field when viewed from above. At least two carriages 3 are allowed to travel in the same direction on the guide rail 2.

The bracket 6 at the front of the carriage 3 is provided with a light
A detector 5 having a transmitter for transmitting signals such as radio waves and sound waves and a receiver for receiving the signals, has a trolley 3 on its signal path.
Inclining to the left and right with respect to the traveling direction of
It is provided. The detector 5 is horizontally swingable when the lock mechanism (not shown) is released with respect to the bracket 6, and the direction can be changed.

A first reflector 10 and a second reflector 11 for reflecting the signal of the detector 5 are provided on a bracket 9 arranged in the left-right direction on the rear portion of the carriage 3. The reflector 1
0 and 11 are lock mechanisms for the bracket 9 (not shown)
When is released, it can be horizontally swung and its direction can be changed. As shown in FIG. 3, when the rear carriage 3 is in the position indicated by the solid line, the first reflector 10 reflects the signal of the detector 5, and the rear carriage 3 is
Is located at the position indicated by the alternate long and short dash line, the second reflector 11 reflects the signal from the detector 5. And
When the detector 5 receives the reflected signal from the first reflector 10, the rear carriage 3 is braked based on the received signal to decelerate, and the reflected signal from the second reflector 11 is detected. When the container 5 receives the signal, the rear carriage 3 is brought to an emergency stop based on the received signal, and a collision with the front carriage 3 is prevented.

The trolley 3 is not limited to one that travels along the guide rail 2, but may be one that guides and travels by an electromagnetic induction system, an optical induction system, or the like.

[0017]

The present invention has the following effects due to the above-mentioned configuration. According to the invention of claim 1, since the detector is provided so as to incline the signal path thereof with respect to the traveling direction of the trolley, the trolley can be provided without providing any member in the middle of the traveling lane. Can be detected, and by providing a plurality of reflectors, one detector can detect a plurality of positions corresponding to the number of reflectors. According to the second aspect of the present invention, it is possible to detect how far the rear carriage is apart from the front carriage. According to the first and second aspects of the invention, the position at which the truck is detected by the simple work of changing the directions of the detector and the reflector (in other words, the distance between the front end of the traveling path and the truck or the distance between the trucks). Can be changed easily.

[Brief description of drawings]

FIG. 1 is a simplified plan view showing a first embodiment of the present invention.

FIG. 2 is an enlarged sectional view taken along line II-II of FIG.

FIG. 3 is a simplified plan view showing a second embodiment of the present invention.

[Explanation of symbols]

 3 dolly 5 detector 10 first reflector 11 second reflector

Claims (2)

[Claims] 1. A detector having a transmitter for transmitting signals such as light, radio waves, and sound waves and a receiver for receiving the signals at the front of the truck, and the signal path is inclined with respect to the traveling direction of the truck. A position detecting device for a truck, which is provided in such a manner that a reflector for reflecting the signal is provided in front of the traveling path of the truck. 2. A detector having a transmitter for transmitting signals such as light, radio waves, and sound waves and a receiver for receiving the signals at the front of the truck, and the signal path is inclined with respect to the traveling direction of the truck. A vehicle position detecting device, which is provided in such a manner that a reflector for reflecting a signal from a detector is provided at the rear of the vehicle.