JPH0568769U - Overhead vehicle interlock device - Google Patents

Abstract

(57) [Summary] [Purpose] To allow the standby position of overhead traveling vehicles to be set freely before the curve section. [Constitution] The rail 2 includes curves R and L, and an optical transmission device 8 and a photoelectric tube 7 are installed on a straight line between them.
The optical transmission device 8 transmits a stop signal to the overhead traveling vehicle 1 after the photoelectric tube 7 detects the overhead traveling vehicle 1 until the photoelectric tube 5 detects the overhead traveling vehicle 1. The optical transmission device 8 is the overhead traveling vehicle 1.
Has a communication range equal to or more than the braking distance from the start of deceleration to the stop of the normal traveling speed, and therefore a start signal can be transmitted to the overhead traveling vehicle 1b stopped by the stop signal.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an overhead traveling vehicle that travels along a rail suspended from a ceiling, and particularly to an interlock device for an overhead traveling vehicle for preventing a collision with a preceding overhead traveling vehicle.

[0002]

[Prior Art]

 In a factory or warehouse, overhead traveling vehicles that run along rails suspended from the ceiling are used to transport goods between stations. When a plurality of overhead traveling vehicles travel along one rail, a collision prevention sensor is provided in front of the overhead traveling vehicle, and when the sensor detects the preceding overhead traveling vehicle, the succeeding overhead traveling vehicle is detected. Is slowing down and stopping to prevent a rear-end collision.

However, since the preceding overhead traveling vehicle cannot be detected in the curved portion of the rail, a special interlock device is provided only in the curved portion. That is, sensors are installed at the entrance and exit of the curve to detect the passage of overhead vehicles, and the rails in front of the sensors at the entrance have magnetic tapes extending in the direction of travel of the overhead vehicles. Affix. A sensor at the entrance / exit of the curve detects whether or not an overhead traveling vehicle exists in the curve section, and when it exists, an electric voltage is applied to the trolley provided on the rail, and the overhead traveling vehicle is collected via the current collector of the overhead traveling vehicle. Can be informed to the control device of. The overhead traveling vehicle approaching the curved section detects the magnetic tape by the magnetic sensor provided in the overhead traveling vehicle, and immediately decelerates and stops if voltage is applied to the trolley at that time. Since the magnetic tape is attached so as to face the direction of travel of the overhead traveling vehicle, the magnetic sensor continues to detect the magnetic tape even at the stop position. At this stop position, the sensor at the exit of the curve detects the preceding overhead traveling vehicle and waits until no voltage is applied to the trolley.

[0004]

FIG. 3 is a plan view showing an example of a traveling layout of an overhead traveling vehicle. The overhead traveling vehicle 1 travels along the rail 2 in the direction of the arrow. The rail 2 has two curves R and L, and a station 3 is arranged in the lower part of the curve. In such a layout, the straight line between the curves R and L is short, and a dock etc. for stopping immediately above the station 3 is attached to the rail 2. Therefore, interlock control in the curve section is two continuous. The curved curves R and L are treated as one curve section. That is, a photoelectric tube 4 is arranged at the entrance of the curve R, and a photoelectric tube 5 is arranged at the exit of the curve L. When the preceding overhead traveling vehicle is between 1b and 1c, a voltage is applied to the trolley, and the succeeding overhead traveling vehicle 1a. Detects the magnetic tape 6 and stops. This is because the straight line between the curves R and L is short and it is not possible to arrange the two photoelectric tubes and the magnetic tape between them. Therefore, in the section as shown in Fig. 3, only two Amai traveling vehicles could exist at the same time, which affected the passing cycle time.

Therefore, an object of the present invention is to provide an overhead traveling vehicle interlock device for a curve that allows the overhead traveling vehicle to stand by even in a short straight section where a magnetic tape cannot be installed.

[0006]

[Means for Solving the Problems]

 In order to achieve the above object, the present invention can send a start / stop signal by linking with overhead traveling vehicle detection means arranged at the entrance and the exit of a curve, respectively, and decelerating at least from the normal traveling speed of the Tianai vehicle The communication range of the overhead traveling vehicle is greater than the braking distance until the vehicle stops, and the communication range includes the signal transmission means arranged in front of the overhead traveling vehicle detecting means at the entrance of the curve. Configured the locking device.

[0007]

[Action]

 Since the present invention has the above-mentioned configuration, it has the following effects.

In the overhead traveling vehicle interlock device according to the present invention, the overhead traveling vehicle detection means detects whether or not there is a preceding overhead traveling vehicle in the curve section. Specifically, from the time when the overhead traveling vehicle detection unit located at the curve entrance detects the overhead traveling vehicle to the time when the overhead traveling vehicle detection unit located at the curve exit detects the overhead traveling vehicle. Since there are overhead vehicles in the section, the following overhead vehicles must stop and wait before the entrance of the curve. Each overhead traveling vehicle detection means and the signal transmission means are linked, and when the overhead traveling vehicle detection means at the entrance of the curve detects an overhead traveling vehicle, it sends a stop signal, and the overhead traveling vehicle detection means at the exit of the curve travels to the overhead traveling vehicle. When is detected, a start signal is transmitted. The signal transmission means has a communication range of at least the braking distance from the normal traveling speed of the overhead traveling vehicle until it stops after decelerating, and the communication range is located further in front of the overhead traveling vehicle detecting means at the entrance of the curve. Therefore, when the overhead traveling vehicle receives the stop signal, it slows down and stops before the overhead traveling vehicle detection means at the entrance of the curve, and even if it is at the stopped position, it stops from the signal transmission means. A signal and a launch signal can be received.

[0009]

【Example】

 The illustrated embodiment will be described below.

FIG. 1 is a plan view schematically showing a traveling route of an overhead traveling vehicle to which an interlock device for an overhead traveling vehicle according to the present invention is applied. The same members as those shown in FIG. 3 are designated by the same reference numerals.

In FIG. 1, the traveling layout includes curves R and L, and an interlock device using the magnetic tape 6 is used. However, the magnetic tape 6 stops the succeeding overhead traveling vehicle 1a when the preceding overhead traveling vehicle 1 exists in the section between the photoelectric tubes 4 and 7.

An optical transmission device 8 is provided in the straight line portion between the curves R and L. FIG. 2 shows the optical transmission device 8. The optical transmission device 8 is provided on the side surface of the rail 2 so as to project a signal of near infrared light. An optical receiver 9 is provided on the upper surface of the overhead traveling vehicle 1.

The optical receiver 9 receives the start / stop signal from the optical transmitter 8 and transmits it to the control device of the overhead traveling vehicle 1, and the control device starts / stops the overhead traveling vehicle 1.

The communication range of the optical transmission device 8 is a range that exceeds the braking distance at which deceleration is started and stopped at least when the overhead traveling vehicle 1 is traveling at a normal traveling speed. When receiving the stop signal from the optical transmission device 8, the overhead traveling vehicle 1 immediately starts decelerating and stops at the position 1b, but it is possible to communicate with the optical transmission device 8 also at this position. The communication range is set to.

The optical transmission device 8 and the photoelectric tubes 7 and 5 are linked, and when the overhead traveling vehicle 1 preceding the section of the curve L is present, the optical transmission device 8 is caused to transmit a stop signal. That is, since the photoelectric tube 7 detects the overhead traveling vehicle 1 and the photoelectric tube 5 detects the overhead traveling vehicle 1, the overhead traveling vehicle 1 exists within the section of the curve L. The optical transmission device 8 transmits a stop signal to the succeeding overhead traveling vehicle 1 and the overhead traveling vehicle 1 stops at the position 1b.

When the preceding overhead traveling vehicle 1 reaches the position 1c and is detected by the photocell 5, the optical transmission device 8 transmits a start signal to the overhead traveling vehicle 1 at the position 1b, and the overhead traveling vehicle 1 starts moving. To do.

Further, if the succeeding overhead traveling vehicle 1a is on standby due to the magnetic tape 6, the overhead traveling vehicle 1 at the position 1b is started and is detected by the photocell 7, so that the position 1b is reached. You can move forward.

As described above, according to the interlock device for an overhead traveling vehicle according to the present embodiment, three overhead traveling vehicles 1 can exist in the section as shown in FIG. 1, and the inter-vehicle distance can be shortened. It is possible to reduce the passing cycle time of the section and thus improve the transportation efficiency.

Although the embodiment of the present invention has been described above, it is needless to say that the present invention is not limited to the above embodiment and can be appropriately modified within the scope of the gist of the present invention.

[0020]

[Effect of the device]

 According to the interlock device for an overhead traveling vehicle according to the present invention, even if the overhead traveling vehicle cannot be stopped in a short straight part, the following overhead traveling is performed to prevent a rear-end collision at a curved portion. Since the vehicle can be kept on standby, the cycle time for passing a curve is reduced, and thus the work efficiency of the overhead traveling vehicle can be improved.

[Brief description of drawings]

FIG. 1 is a plan view schematically showing a traveling layout of an overhead traveling vehicle to which an interlock device for an overhead traveling vehicle according to an embodiment of the present invention is applied.

FIG. 2 is a perspective view showing the optical transmission device and the overhead traveling vehicle of the embodiment of FIG.

FIG. 3 is a plan view schematically showing a traveling layout of an overhead traveling vehicle to which an example of a conventional overhead traveling vehicle interlock device is applied.

[Explanation of symbols]

 1 overhead traveling vehicle 2 rails 4, 5, 7 photocell 8 optical transmission device

Claims (1)

[Scope of utility model registration request] 1. A braking distance at which a start / stop signal can be transmitted by linking with overhead traveling vehicle detection means arranged at the entrance and the exit of a curve, respectively, and at least a deceleration from the normal traveling speed of the overhead traveling vehicle until the vehicle stops. With the above communication range,
An interlock device for an overhead traveling vehicle, characterized in that the communication range includes signal transmission means arranged so as to be located further in front of the overhead traveling vehicle detecting means at the entrance of the curve.