JPS6015302A - Detector for loading of goods and for abnormal condition such as slide-down of goods - Google Patents

Abstract

PURPOSE:To make possible to perform surely the detection of loading of goods and the detection of abnormal condition such as slide-down of said goods by installing a pair of inside and outside detection means on the device entitled above, which is suitable for a receiving/delivery device or the like of a crane for housing and delivery of goods in an automatic warehouse. CONSTITUTION:On a carriage 3 provided thereon with a receiving/delivery device 4, which can be moved horizontally, a pair of detection units 9, 10 are set in front and in the rear. Each of detection units 9, 10 consists of a pair of inside detection means 11a, 11b, which detect respective right and left sides of a container 6 with shorter width, and a pair of outside detection means 12a, 12b, which detect respective positions fairly shifting to the outer direction from right and left sides of a container 7 with longer width, and each of detection means consists of a light projector 13 and a light detector 14. Therefore, when one of inside detection means 11a, 11b comes to ON, or both inside detection means 11a, 11b and one of outside detection means 12a, 12b come to ON, said device sends out the detection signal for slide-down of said goods, and when both outside detection means 12a, 12b come to ON, said device sends out the detection signal for excess loading.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device for detecting abnormalities such as inventory and cargo collapse, which can be used in conjunction with a cargo delivery device of a loading/unloading crane used in an automated warehouse. If the load is within a predetermined range, regardless of +l> of the load, it is possible to reliably detect whether the load is supported in a predetermined position and whether there is an abnormal condition such as collapse of the load. The object of the present invention is to provide such a detection device.

Hereinafter, one embodiment of the present invention will be described based on the attached illustrative drawings. In FIGS. 1 and 2, 1 is a loading/unloading crane which can travel the entire path between racks 2a and 2b. A cargo delivery device 4 is provided on a carrier range 6 that can be raised and lowered. This cargo delivery device 4 is a conventionally known device comprising a drive roller conveyor 5 that can move close to the left and right racks 2a, 2b. The racks 2a and 2b are provided with container holders 8 for receiving small and medium containers 6 and wide containers 7. ? , 1o is a front and rear pair of detection devices provided on the carrier slide 6, and the detection device 9 acts on a container 6.7 that is delivered to and from one rack 2a. Although this acts on the container 6.7 that is delivered to and from the other rack 2b, a common detection device for both may be provided at one central location.

Each of the above detection devices? , 1o are a pair of inner detection means 11a and llb disposed at positions capable of detecting both left and right sides of the container 6 when the small and medium container 6 is supported at a predetermined position on the drive roller conveyor 5. , when the wide container 7 is supported at a predetermined position on the drive roller conveyor 5, a pair of outside detection means 12a, 12 whose detection positions are slightly outside the left and right ends of the container 7 are installed.
It is composed of b. These valley detection means 11a-1
2b is equipped with a light emitter 16 and a light receiver 14, which are disposed opposite to each other above and below the movement path of the container 6.7, and the light beam from the light emitter 1i5 is blocked by the container 6.7 and reaches the light receiver 14. The container detection signal is configured to be able to output a container detection signal to the next stage in a state where no light is received.

FIG. 3 shows a circuit configuration for outputting an inventory detection signal 15, a collapsed cargo detection signal 16, and an overload detection signal 17 based on the container detection signals from each of the detection means 11a to 12b. 22 to 25 are NOT gates, 22 to 25 are NOT gates, and 26 are OR gates, respectively.

Next, to explain the operation, the action of transferring the container 6.7 between the loading/unloading crane 1 and the racks 2a, 2b and the loading/unloading handling platform arranged beside the home position of the loading/unloading crane 1 is as follows. Containers 6.7 are moved by the drive roller conveyor 5 between the top of the lift 6 and the racks 2a, 2b or the handling platform. When the container 6.7 is delivered or when the container 6.7 is supported at a predetermined position on the lifting gear ledge 3 (cargo delivery device 4), the detection device ? , 10, or both perform the operations for detecting the presence of cargo and detecting abnormalities such as cargo collapse as follows.

That is, as shown by solid lines and imaginary lines in FIG. detects both sides of the container 6.7, so the pair of inner detection means 11a, 11b is in the ON state, and the pair of outer detection means 12a, 12b is in the OFF state.
Since all four of the AND gates 18 in FIG.

Further, according to the circuit configuration of FIG. 3, the detection means 11a to 12
When at least one of the detection means b is in the ON state, the pair of inner detection means 11 is turned on as described above.
Only a and llb are not in the ON state (AND
The condition is that the presence detection signal 15 is not output from the gate 18) and that all the detection means 11a to 12b are in the ON state and the overload detection signal 17 is not output from the AND game 119. , the load collapse detection signal 16 is output from the AND game 121. Therefore, if the position of the small or medium container 6 shifts to the left or right, the four detection means 112
~ 12b, when only one of the pair of inside detection means 11a, 11b is in the ○N state, or when the large width container 7
The position of the pair of inner detection means 11a is shifted to the left or right.
, 11b and one of the pair of glue 1 side detection means 12a, 12b is turned on, the load collapse detection signal 16 is output as described above. Further, when an oversized container is handled in which all four detection means 11a to 12b are turned on as described above, an overload detection signal 17 is outputted from the AND gate 19.

When the load collapse detection signal 16 and the overload detection signal 17 are output, the container transfer operation by the load transfer device 4, the lifting/lowering operation of the elevating garreson 6, or the loading/unloading crane 1 is performed based on these signals 16.17. It is possible to automatically stop the vehicle from running and activate an alarm.

The device for detecting abnormalities such as inventory and cargo collapse according to the present invention can be implemented and used as described above, and has an extremely simple structure that uses only a pair of inside detection means and a pair of outside detection means. The apparatus ranges from a minimum medium load whose left and right ends are located slightly outside the detection positions of the pair of inner detection means to a maximum rl+ whose left and right ends are located slightly inside the detection positions of the pair of outer detection means. The present invention detects the presence of a load when the front of the load is supported at a predetermined position regardless of the number of loads, and detects the collapse of the load when the front of the load is unreasonably shifted to the left or right. This can be done reliably. Further, if necessary, it is also possible to detect an oversized load as shown in the embodiment.

[Brief explanation of the drawing]

FIG. 1 is a front view, FIG. 2 is a side view, and FIG. 3 is a diagram showing the circuit configuration. 1... Loading/unloading crane, 2a, 2b... Rack, 6
・・・Lifting carrier, 4... Cargo delivery device, 5...
・Drive roller conveyor, 6...small R11 container,
7...Large 11 container, 9.10...Detection device, I
la, llb...a pair of inner detection means, 12a, 12
b... A pair of outer detection means, 13... Floodlight, 14
...Receiver, 18-21...AND gate, 22-
25...NOT game Figure 1 δ Figure 2 Figure 3 Figure 2

Claims (1)

[Claims] A predetermined number of
] a pair of inside detection means for detecting the left and right sides of the load;
A pair of outer detection means whose detection position is a certain distance apart from the detection position of the rain detection means is arranged, and when only the pair of inner detection means is in the load detection state, A device for detecting abnormalities such as inventory and cargo collapse, with the load detection state being in the load detection state and the other detection state being in the abnormality detection state such as cargo collapse.