JPH0519058A - Article carry-out monitor - Google Patents

Abstract

PURPOSE:To improve a situation that carry-out stuffs must stand by for measurement because of full stockers in a time zone when stuffs rush by effectively using inner spaces of a stocker without useless open spaces and by increasing the number of stored articles by about three times, three of which have been the conventional limitation. CONSTITUTION:An article carry-out monitor is provided with beams 17 to support both ends of a tray 9 carrying articles on both side walls at a small pitch in the height direction in a plurality of stages inside a stocker 16 which momentarily stores articles after measurement by a radiation detector 1. This monitor comprises a controller 15 which controls a stocker drive 7 so as to insert the tray 9 carrying articles into lower end beams 17 of an open space article height on the basis of a signal indicating the article height from an article height detector 3 and a tray presence signal from a tray sensor 18 arranged in every beam and then makes height directional alignment of the stocker 16.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an article unloading monitor used in a nuclear facility.

[0002]

2. Description of the Related Art An article carry-out monitor has a function of bringing an article close to a radiation detector to detect the presence or absence of radioactive contamination, and also temporarily stores articles for which measurement has been completed so that continuous measurement processing can be performed. A stocker is installed.

FIG. 2A shows a conventional article monitor. In the figure, reference numeral 1 denotes a radiation detector. Five monitors for side surfaces and four surfaces for four circumferences are arranged in an upper portion of a monitor casing 11, and a radiation detector 1 for a lower surface is opposed to the upper surface for driving a lower surface detector. Device 2
It is arranged so that it can be moved up and down. The article transporting device 4 is arranged from the article loading port on the left side of the drawing toward the back, and the tray 9
The article is loaded into the container. Of the upper radiation detectors 1, article height detection devices 3 are arranged on the lower surfaces of two detectors facing each other in the direction in which the articles are sent. A stocker 6 is provided inside the monitor housing 11, and can be moved vertically by a stocker drive device 7. A tray shelf 8 is fixedly attached inside the stocker 6. A tray detection sensor 10 is arranged on each tray shelf 8.

Further, a control device 5 is provided to receive signals from the article height detection device 3 and the tray detection sensor 10, and each of the lower surface detector drive device 2, the article transport device 4 and the stocker drive device 7. Control movements.

In this conventional article unloading monitor, the maximum height of the article to be processed is determined in advance, the inside of the stocker 6 is equally divided into the maximum height dimension, and the article is stored at each position. Was becoming. According to this method, the maximum processing height is set to 30 cm assuming the height of the articles actually carried out from the nuclear facility, and if the internal space of the stocker 6 is divided into equal parts, about 3 pieces will be the storage limit.
As shown in (b), the tray shelves 28 were fixedly provided in three stages in the stocker 6. Therefore, in the evening when the worker finishes the work and leaves the nuclear facility,
Since the article carry-out monitor is continuously used, there is a problem that the stocker 6 is often full and it is necessary to wait for the measurement operation.

[0006]

SUMMARY OF THE INVENTION As described above, the drawback of the conventional technique is that the largest articles can be delivered in spite of the overwhelmingly large number of writing utensils and documents with low height. In the assumed space, the inside of the stocker 6 is equally divided and the tray shelf 28 is fixedly provided.

In view of the above, the present invention eliminates waste of space inside the stocker, allows a large number of articles to be stored therein, and does not delay measurement processing because the stocker is full, so that articles can be smoothly flowed out. The challenge is to realize a monitor.

[0008]

SUMMARY OF THE INVENTION An article carrying-out monitor of the present invention is a monitor having a radiation detector for measuring radioactive contamination of an article and a stocker for temporarily storing the article after the measurement, wherein a tray is provided inside the stocker. Bars for supporting both ends of each of the bars are provided on the both side walls in a plurality of steps at a small pitch in the height direction, and a signal indicating the height of the article to be stored from the article height detection device and the above-mentioned each row are arranged. Based on the tray presence / absence signal from the tray detection sensor, the stocker drive device is controlled so that the tray on which the article is placed is inserted into the bar at the lower end of the open space that matches the article height, and the stocker is aligned in the height direction. A control device is provided.

[0009]

In the article carry-out monitor of the present invention, the control unit can know the height of the article to be stored and the clear space corresponding to the height of the article from the tray presence / absence signal of each bar, and the The stocker driving device is controlled so that the tray on which the article is placed is inserted into the crosspiece, and the stocker is aligned in the height direction so that the article can be stored. Therefore, the internal space of the stocker can be effectively used without wasted light space, and as a result of increasing the storage capacity, the stocker is less likely to be full and waiting for measurement.

[0010]

The present invention will be described in detail below with reference to the embodiments shown in the drawings.

1A and 1B show an article unloading monitor according to an embodiment of the present invention. As shown in FIG. 1A, in the radiation detector 1, five units for side surfaces and upper surfaces of four circumferences are arranged in an upper portion of the monitor housing 11, and the radiation detectors for the lower surface are opposed to each other for the upper surface. 1 is arranged so that it can be moved up and down by a lower surface detector driving device 2. The article conveying device 4 is arranged from the article loading port on the left side of the drawing toward the back, and the articles are loaded into the tray 9 and loaded. Of the upper radiation detectors 1, article height detection devices 3 are arranged on the lower surfaces of two detectors facing each other in the direction in which the articles are sent.

A stocker 16 is provided inside the monitor housing 11.
Is provided and can be moved in the vertical direction by the stocker drive device 7. Inside the stocker 16, crosspieces 17 for supporting both ends of the tray 9 are provided in a plurality of stages on both side walls at a predetermined pitch in the height direction. The pitch of the crosspiece is a condition that both ends of the tray 9 can be inserted.
It is selected as the dimension of both ends in the height direction plus a margin dimension. Further, a tray detection sensor 18 for detecting whether or not the tray 9 is inserted is arranged for each of the left and right rails of each rail 17.

Further, a control device 15 is provided to receive signals from the article height detection device 3 and each tray detection sensor 18, and the lower surface detector drive device 2, the article transport device 4 and the stocker drive device 7 are also provided. Control each operation. For the stocker drive device 7, the control device 15
From the signal of the height of the article to be stored and the presence / absence of the tray 9 for each crosspiece 17, find a clear space commensurate with the height of the article, and insert the tray 9 on which the article is placed into the crosspiece 17 at the lower end of the open space. To control the stocker drive device 7 to align the stocker 16 in the height direction.

In the article unloading monitor of the embodiment of the present invention configured as described above, when the article placed on the tray 9 is placed on the article carrying device 4, it is carried to the top of the lower surface detection radiation detector 1, It is lifted by the lower surface detector driving device 2 and carried to the measurement position close to the upper five radiation detectors 1,
The radioactive contamination of each side of the article is measured. Then, it passes through the article height detection device 3 while the article is rising. The article height detection device 3 is composed of, for example, a light beam switch, and can detect the article height by the length of time elapsed from when the article starts to rise until the light beam switch is operated.

The control unit 15 controls the signal from the article height detection apparatus 3 indicating the article height and the tray detection sensor 18 for each bar.
From the signals, a clear space corresponding to the height of the article to be stored is found, and the tray 9 on which the article is placed is attached to the bar 17 at the lower end of the clear space. So that it can be inserted by
The stocker driving device 7 is controlled to align the stocker 16 in the height direction so that the crosspiece 17 into which the stocker 16 is inserted and the feeding surface of the article transporting device 4 are at the same level. After that, the article conveying device 4 is operated to feed the tray 9 on which the articles are placed to the crosspiece 17 to be inserted, and the articles are stored.

The above operation is sequentially repeated, and the operation shown in FIG.
As shown in, the articles having different heights are stored in the stocker 16 so that there is no light space.

As described above, in the article carry-out monitor according to the embodiment of the present invention, the internal space of the stocker 16 can be effectively used without wasteful lighting space, and the number of stored articles which has been limited to three in the past. Can be expected to increase about 3 times. Therefore, in the time zone in which the unloaders are inundated, the stocker is often full and waiting for the measurement has been conventionally occurred. However, according to the article unloading monitor of the present invention, the above-mentioned waiting can be reduced. ..

[0018]

As described above in detail, according to the present invention, the crosspieces for supporting both ends of the tray placed on the article are provided in the stocker for temporarily storing the article after the measurement with a small pitch in the height direction. In accordance with the signal indicating the height of the article to be stored from the article height detection device and the tray presence signal from the tray detection sensor arranged for each of the bars, By realizing the article unloading monitor equipped with a control device that controls the stocker drive device to insert the tray on which the article is placed into the crosspiece at the lower end of the matching space, and aligns the stocker in the height direction, It is possible to effectively use the internal space of the device without wasteful lighting space, and it can be expected that the number of stored items, which has been limited to three in the past, is tripled. Therefore, it is possible to improve the situation that the stocker is kept waiting for the measurement during the time when the unloaders are inundated.

[Brief description of drawings]

FIG. 1 shows an article unloading monitor according to an embodiment of the present invention, and FIG.
FIG. 1A is a schematic elevational view showing the entire structure, and FIG.
[Fig. 2] is a front view showing an article storage state of the stocker of Fig. 1 (a).

FIG. 2 shows a conventional article unloading monitor, FIG. 2 (a) is a schematic elevational view showing the entire configuration, and FIG. 2 (b) is FIG.
It is a front view which shows the goods storage state of the stocker of (a).

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Radiation detector 2 ... Lower surface detector drive device 3 ... Article height detection device 4 ... Article transport device 7 ... Stocker drive device 9 ... Tray 11 ... Monitor housing 15 ... Control device 16 ... Stocker 17 ... Bar 18 ... Tray Detection sensor

Claims (1)

Claim: What is claimed is: 1. An article unloading monitor having an article transporting device, a radiation detector, an article height detecting device, a stocker and a stocker driving device, wherein both ends of a tray on which an article is placed are placed inside the stocker. A crosspiece for supporting is provided on both side walls in a plurality of steps with a small pitch in the height direction, and a signal indicating the height of the articles to be stored from the article height detecting device and a tray detection sensor arranged for each of the crosspieces. Based on the tray presence / absence signal from the above, a control device for controlling the stocker driving device so as to insert the tray on which the article is placed into the crosspiece at the lower end of the clear space commensurate with the height of the article so that the stocker is aligned in the height direction. An article discharge monitor characterized by being provided.