JP2870419B2 - Transfer device and heavy load transfer method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for transporting heavy objects, and more particularly, to a heavy object such as a nuclear power plant in a building having a double door that blocks an entrance to and from the outdoors. The present invention relates to a transport device and a method for transporting heavy objects suitable for loading and unloading articles.

[0002]

2. Description of the Related Art In a nuclear power plant, in order to prevent radioactive materials from scattering from a reactor building or the like and contaminating the surrounding environment, the inside of the building is sucked and maintained at a negative pressure.
A double entrance is used for the entrance of the article that communicates with the outside of the building, and the double door is alternately opened and closed to carry in and out the article. Conventionally, when a large article such as a heavy article is carried into the reactor building, a method as shown in FIG. 5 has been used.

[0003] First, as shown in FIG. 5 (1), the outer door 1 that shuts off the outdoor 10 and the intermediate room 12
4 is opened by pulling it up as indicated by an arrow 16 or the like. At this time, the inner door 22 that separates the building 20 of the reactor building 18 from the intermediate room 12 is closed. Next, the vehicle 26 loaded with the baggage 24 enters the intermediate room 12 as indicated by an arrow 28.

Then, as shown by an arrow 30 in FIG.
After lowering the outer door 14 to shut off the outside 10 and the intermediate chamber 12, the inner door 22 is pulled up as shown by the arrow 32,
The vehicle 26 is loaded with luggage 24 as shown in FIG.
And stop at a predetermined position. Then, as shown in FIG. 5C, the load 24 is lifted by a crane 36 or the like provided in the building as indicated by an arrow 38 and transported to a predetermined position. In addition, when carrying out the luggage from the reactor building 18, the above steps are performed substantially in the reverse order.

[0005]

However, there are the following drawbacks in the conventional loading and unloading of luggage as described above. (1) Since the intermediate room 12 and the building 20 are radiation controlled areas, they are cured such as laying a vinyl sheet on the carrying path of the vehicle 26, and radioactive substances adhere to the vehicle 26 and are not taken out of the controlled area. You need to do that. (2) The driver of the vehicle is not allowed to leave the vehicle 26 in the building 20 which is the management area, and remains in the vehicle until the baggage 24 is unloaded from the vehicle 26.
Then, depending on the location, when the vehicle 26 is put into the intermediate room 12, the driver who drives the outdoor 10 and the driver who drives the intermediate room 12 and the building 20 which are the radiation control areas must be changed. (3) When the vehicle 26 exits the radiation control area, it needs to be inspected for contamination by radiation measurement when exiting the control area. If the vehicle 26 is contaminated, it must be removed. (4) As a result of the curing as described in (1), the used curing material must be disposed of as a contaminant, and the transportation cost of the load 24 increases. (5) Each of the above steps cannot be performed independently by the working side, and must be performed in the presence of a radiation control section member or a security officer of a customer power company, which is extremely troublesome.

[0006] For this reason, loading and unloading heavy objects into and from the reactor building is not only troublesome, but also takes a long time to load and unload, and is expensive. This is the same in other facilities such as a turbine building and a waste building in a nuclear power plant.

The present invention has been made to solve the above-mentioned drawbacks of the prior art, and has as its object to prevent a vehicle from entering an area where there is a risk of contamination, such as a radiation control area.

[0008]

In order to achieve the above-mentioned object, a transport device according to the present invention is provided between an outdoor and a building.
To prevent environmental pollution, it disposed in the intermediate chamber formed between the double door which separates the outdoor and the building, of the double door one
Outdoor or in front of the open side when one of the doors is opened
It is characterized by having a beam that can protrude in any of the building interiors and a lifting means movably provided along the beam.

Further, in the heavy object transporting method according to the present invention, an intermediate area is provided between the first area and the second area, and the first and second doors disposed on both sides of the intermediate area are provided. In the heavy object transporting method for moving a heavy object from the first area to the second area by alternately opening and closing, the heavy article is provided in the intermediate area with opening of a first door that partitions the first area and the intermediate area. Extending the expandable beam into the first area, lifting the heavy object in the first area by lifting means provided on the beam, and then reducing the beam while the heavy object is suspended, The first door is closed upon completion of the retraction of the beam, and the second door separating the intermediate area and the second area is opened with the closing of the first door. The beam is extended into the second area with the opening of the second door. And, it is the structure down the heavy said Agekasane means is hung on the second region.

[0010]

According to the present invention having the above-described structure, for example, when a heavy object (baggage) is carried into a reactor building, a vehicle loaded with the baggage is divided into an outdoor area as a first area and an intermediate chamber as an intermediate area. Stop in front of the first door and open the first door. And
The beam provided in the intermediate chamber is extended to project one end side to the outside, and a heavy object loaded on the vehicle is lifted by a lifting means such as an electric hoist provided on the beam. Thereafter, the beam is reduced and pulled into the intermediate room with the heavy object suspended by the lifting means, and the first door is closed to shut off the intermediate room from the outside. Next, while opening the second door that shuts off the reactor building interior and the intermediate chamber, which is the second area, extends the beam, inserts the other end into the building, and drives the lifting means. Hang a suspended heavy object in the building. Then, when the suspension of the heavy object is completed, the beam is drawn into the intermediate room and the second door is closed.

Therefore, heavy objects can be carried into a reactor building or the like while the vehicle is parked outdoors, eliminating the need for curing the carry-in path, disposing of the curing material, and decontaminating the vehicle, which were required in the past. This makes it extremely easy to carry in a heavy object, and the work efficiency is improved, so that the time for the carry-in operation can be greatly reduced.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of a transport apparatus and a method for transporting heavy articles according to embodiments of the present invention will be described in detail with reference to the accompanying drawings. In addition, the same reference numerals are given to portions corresponding to the portions described in the above-described related art, and description thereof will be omitted. FIG. 1 is a front view of a transfer device according to an embodiment of the present invention, showing an example provided in a nuclear power generation facility.

In FIG. 1, an intermediate chamber 12 serving as an intermediate area is provided.
, A fixed beam 42 is fixed to a plurality of mounting brackets 46 installed on a ceiling 44. The fixed beam 42 has a substantially I-shaped cross section, and the traveling beam 48 is supported by the fixed beam 42. The traveling beam 48 forms a telescopic beam together with the fixed beam 42, and is movable in the longitudinal direction of the fixed beam 42. That is, the traveling beam 48 is substantially U-shaped on the upper surface facing the fixed beam 42 at an appropriate distance in the center in the longitudinal direction.
Roller frames 50 and 52 having a character shape are provided, and are supported by the fixed beam 42 via rollers attached to the roller frames 50 and 52.

One driving roller 56 for moving the traveling beam 48 along the fixed beam 42 is provided on the roller frame 50.
And three support rollers 58 (see FIG. 2). These rollers 56 and 58 are connected to the I-shaped fixed beam 42.
And the lower flange 60 of the fixed beam 42
Of the traveling beam 4 through the roller frame 50.
8 with respect to the fixed beam 42 and the flange 6
Roll on the inner surface of zero. The driving roller 56 is connected to a gear motor 62 and is rotated by the motor 62 to move the traveling beam 48 in the longitudinal direction of the fixed beam 42 so that the end of the traveling rail 48 is moved to the end of the fixed beam 42. To extend from On the other hand, 2
A pair of dead weight supporting rollers 54 are attached to both sides of the fixed beam 42, and these rollers 54 come into contact with the inner surface of the lower flange 60 of the fixed beam 42 so that the traveling beam 48 is fixed via the roller frame 52. 42.

The traveling beam 48 includes reaction force receiving rollers 64 for preventing the traveling beam 48 from inclining by contacting the lower surface of the fixed beam 42 at both ends of the upper surface on the fixed beam 42 side.
66 is attached. The traveling beam 48 having the H-shaped cross section has substantially the same length as the fixed beam 42,
When the self-weight supporting roller 54 and the driving roller 56 are disposed at the central portion in the longitudinal direction, when the self-weight supporting roller 54 and the driving roller 56 move leftward in FIG. 1 as shown by an arrow 68 in FIG.
As shown in FIG. 3 (2), the left end protrudes from the left end of the fixed beam 42 and can be extended to the outdoors 10. When the traveling beam 48 is moved rightward in FIG. 1 as indicated by an arrow 70 in FIG. 1, the right end protrudes from the right end of the fixed beam 42 as shown in FIG. It can be inserted into the room 20.

The rollers 5 are provided at both ends of the fixed beam 42.
Stoppers 72, 74 are formed to prevent the overrunning of the traveling beams 4, 56, 58.
The limit switches 76 and 78 for detecting that the eight roller frames 50 and 52 have reached the movement limit are attached. An electric hoist 80 is attached to the traveling beam 48 as a lifting means for self-propelling the rail 48 as shown by an arrow 82. Further, beam sensors 90 and 92 for detecting that the traveling beam 48 has been pulled in below the fixed beam 42 are attached to both ends of the fixed beam 42. The detection of the beam sensors 90 and 92 is performed by a gear motor. 6
2 is input to a controller 94 for controlling the control signal No. 2. In addition, a door sensor 96 for detecting opening and closing of the outer door 14 as the first door is attached to an entrance / exit portion of the intermediate room 12 to the outdoor 10 serving as the first area. A door sensor 98 for detecting the opening and closing of the inner door 22, which is the second door, is attached to the doorway of the controller.
To be entered.

The loading of the cargo into the reactor building by the transport device configured as described above is performed as shown in FIG.
Usually, the outer door 14 which is the first door and the inner door 22 which is the second door are closed, and the intermediate room 12 is the first outdoor area 1
0 and the building 20 which is the second area,
In the transport device 40, the traveling beam 48 is drawn under the fixed beam 42 as shown in FIG. And luggage 24
When the vehicle loaded with the vehicle stops in front of the outer door 14, the controller 94 is activated, and the controller 94 drives a door opening / closing device (not shown) to open the outer door 14 as shown by an arrow 16 in FIG. The door sensor 96 detects this and inputs it to the controller 94. The controller 94 includes the outer door 14
Is released, the gear motor 62 of the transfer device 40 is driven to move the traveling beam 48 to the left in the drawing,
The telescopic beam composed of the traveling beam 48 extends and the left end of the traveling beam 48 projects outside 10. Thereafter, the controller 94 moves the electric hoist 80 to the left and stops it above the vehicle 26. When the load 24 loaded on the vehicle 26 is lifted by the hoist 80, the controller 94 again operates the gear motor 62.
Is driven to reduce the telescopic beam as shown by the arrow 84 and draw the traveling beam 48 into the intermediate chamber 12.

When the traveling beam 48 is retracted below the fixed beam 42, a retraction end signal is input from the beam sensor 90 to the controller 94, and the controller 94 returns to FIG.
The outer door 14 is closed as indicated by the arrow 30 in FIG.
And the outside 10 are shut off, and the hoist 80 is moved rightward in the figure as indicated by an arrow 86. Further, when the outer door 14 is closed, the controller 94 drives a door opening / closing device (not shown) to drive the inner door 22 as shown in FIG.
Is opened as indicated by an arrow 32, and the right end of the traveling beam 48 is set in the building 20 based on the opening detection signal of the door sensor 98.
To protrude. Thereafter, the electric hoist 80 on which the load 24 is hung is moved rightward in the figure as indicated by an arrow 88 to hang the load into the building 20 and drop the load 24 onto the floor of the building 20. When the suspension of the load 24 is completed, the controller 94 pulls the right end of the traveling beam 48 into the intermediate chamber 12, receives the pull-in completion signal from the beam sensor 98, lowers the inner door 22, and lowers the inner door 12. And the building 20 are shut off. In addition, when carrying out the luggage from the reactor building 18, the carrying out is performed in a procedure substantially reverse to the above-described carrying-in step.

As described above, in the embodiment, the vehicle 26
The luggage 24 can be carried into the building 20 while the vehicle is parked outdoors 10, and there is no need for the vehicle 26 to get into the intermediate room 12 or the building 20 which is a radiation control area.
When the electric hoist 80 is taken out of the radiation control area, only the radiation of the hoist 80 needs to be measured. Therefore, curing work such as laying a vinyl sheet on the carry-in path due to the vehicle 26 having entered the control area, disposal of the curing material, radiation contamination measurement of the vehicle 26, and decontamination work can be eliminated. Can be easily carried in and out, the work efficiency can be improved, the working time can be shortened, and the cost for carrying in and out the luggage 24 can be reduced.

In the above embodiment, the case where the electric hoist 80 is used as the lifting means has been described.
Another lifting device such as a chain block may be used. In the above embodiment, the luggage 24 is stored in the reactor building 18.
Although the description has been given of the case of carrying in a nuclear power plant, the present invention can be similarly applied to a turbine building and a waste building of a nuclear power generation facility, and can also be applied to a facility having another double door such as a clean room. Further, in the above embodiment, the case where the opening and closing of the door and the expansion and contraction of the beam are linked by the controller has been described, but it is needless to say that these need not be linked.

[0021]

As described above, according to the present invention, the first door is opened, and the telescopic beam provided in the intermediate area is extended to project into the first area, and the beam is provided on the beam. After lifting the heavy object in the first area by the lifting means,
The beam is reduced and pulled into the intermediate area while the heavy object is suspended, and the first door is closed. Then, the second door is opened to extend the other side of the beam and protrude to the second area. By lowering the suspended heavy objects into the second area, for example, when carrying heavy objects from outside to the reactor building, the weight can be reduced without having to drive the vehicle into the reactor building where there is a risk of contamination. Objects can be transported.

[Brief description of the drawings]

FIG. 1 is a front view of a transport device according to an embodiment of the present invention.

FIG. 2 is an explanatory diagram of a rail drive device provided on a traveling beam according to the embodiment.

FIG. 3 is an explanatory diagram of an operation of the transport device according to the embodiment.

FIG. 4 is an explanatory diagram of a heavy object transport method according to the embodiment.

FIG. 5 is an explanatory diagram of a conventional method of transporting heavy objects.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 1st area (outdoor) 12 2nd area (intermediate room) 14 1st door (outer door) 20 2nd area (building interior) 22 2nd door (inner door) 40 Transport device 42, 48 Telescopic beam (fixed beam) , Running beam) 54 Self-weight support roller 56 Drive roller 80 Lifting means (electric hoist)

Claims (2)

(57) [Claims] (1) Preventing environmental pollution between the outside and a building.
Therefore, it is disposed in an intermediate room formed between a double door that separates the outside and the building, and one of the double doors is opened.
A transport device comprising: a beam that can protrude to either the outside or the building on the side that is sometimes open, and lifting means that is movably provided along the beam. 2. An intermediate area is provided between the first area and the second area, and first and second doors disposed on both sides of the intermediate area are alternately opened and closed to remove a heavy object from the first area. In the heavy object transfer method for moving from the area to the second area, the expandable beam provided in the intermediate area is moved into the first area with the opening of the first door that separates the first area and the intermediate area. Stretch,
After lifting the heavy object in the first area by the lifting means provided on the beam, the beam is reduced and pulled into the intermediate area in a state where the heavy object is suspended, and with the completion of the retraction of the beam, Closing the first door, opening the second door that separates the intermediate area and the second area with the closing of the first door, and opening the second beam with the opening of the second door. A method of transporting a heavy object, wherein the heavy object extends into an area, and the heavy object suspended by the lifting means is lowered into the second area.