JPS6313974Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a moving device for a cart that moves across a plurality of rooms within a cell that requires sealing.

In places where radioactivity is a problem, such as nuclear power plants, there are cells that are sealed and isolated from the outside and do not leak radiation, and these cells are adjacent to cells that are undergoing repair work in addition to cells that are constantly in use. is normal. Normally, workers do not enter cells that are in constant use, and remote-controlled transportation means such as trolleys are used. In this case, due to the location of the trolley itself, it is necessary to make maintenance easy and provide convenient power supply, but since the drive motor is attached to the trolley, maintenance such as brush replacement is difficult due to deterioration due to radioactivity. This is often necessary, and it also has the disadvantage of requiring power supply equipment to be provided within the cell.

Therefore, in view of the above-mentioned drawbacks, the present invention aims to provide a trolley moving device that is easy to maintain and supply power to.

In order to achieve such an object, the present invention has a passage port between a plurality of adjacent cells that can be sealed with the outside, and a screw shaft is arranged for each cell, and a screw shaft is attached to the screw shaft to connect to the outside of each cell. The present invention is characterized in that it is provided with a cart which connects the arranged drive motors and has a half-split screw at the bottom that engages with the screw shaft.

An embodiment of the present invention will now be described with reference to FIGS. 1 to 8. In FIGS. 1 and 2, there are cells 1a and 1b that can be sealed with the outside,
This cell 1a is always used, and cell 1b
is used as a cell for repair work. These cells 1a, 1b
A passage hole 2 is provided in the cell wall between the cells, and a rail 3 is laid through the passage hole 2 from end to end inside the cells 1a and 1b. Further, a screw shaft 4 is installed in parallel with the rail 3 for each cell 1a, 1b. Since the screw shaft 4 is used to move a cart which will be described later, it is generally a square screw or a trapezoidal screw. The screw shaft 4 is supported by a support stand 5 at a plurality of locations. Strictly speaking, screw shaft 4
It is necessary to place the support stand 5 at an appropriate position so that the engagement with the female screw placed on the truck does not become shallow due to deflection due to its own weight.
When a trapezoidal screw is used, it is necessary to arrange the support stand 5 at an appropriate position in order to prevent deflection due to relative reaction force acting from the thread angle.

A gear 6 that meshes with an integral gear 4a is arranged at the end of the screw shaft 4 for each cell 1a, 1b, and a bevel gear 7a is provided on the same shaft as this gear 6. . The shaft of the bevel gear 7b that meshes with the bevel gear 7a passes through the walls of the cells 1a and 1b, is led out, and is connected to the shaft of a motor 8a. In this case, the gear 6 and the bevel gear 7a will be located below the screw shaft 4. This is because the carriage will be positioned above the screw shaft 4 and will not become an obstacle to it. When the screw shaft 4 is arranged from end to end in each cell 1a, 1b, a gear 4a that meshes with the gear 6 mentioned above is provided on the screw shaft 4, and a gear 4a is provided in the upper part of the bevel gear 7a. Due to its location, it is designed as a shaft.

A truck 8 is placed on the screw shaft 4 and the rail 3, and the lower part of the truck 8 is constructed as shown in FIGS. 3 to 6. At the center of the bottom along the longitudinal direction of the truck 8, two half-split female threaded portions 9 are provided at the front and rear. This female threaded portion 9 engages with the thread of the screw shaft 4, and has a structure shown in FIG. 6 as an example. In this example, the valley portion at the end of the female threaded portion 9 is widened to ensure that the female threaded portion 9 begins to engage with the threaded portion from the shaft of the screw shaft 4 when the carriage 8 moves. In this case, two female threaded portions 9 may be attached to one truck 8 at the front and rear, but one female thread portion 9 may be attached to the front and rear of the truck 8.

Wheels 10 that roll on the rails 3 are attached to both sides of the bottom of the truck 8. A guide 11 is provided inside the wheel 10, and at the lower end of the guide 11 there is a roller 1 that rolls against the inner surface of the rail 3.
2 is provided to prevent the cart 8 from wobbling from side to side.

In addition, as shown in FIGS. 4 and 5, the trolley 8
The female screw portion 9 is configured to be slightly movable in the front and back direction, and springs 13 are provided between the front and rear of the female screw portion 9 and the carriage 8, respectively.
This spring 13 is provided to prevent the screw from galling that occurs due to the engagement between the female threaded portion 9 and the screw shaft 4. That is, cell 1
It is possible to allow play in the female threaded portion 9 that is sufficient to absorb the relative error in the rotational speed of the screw shafts 4 of each of the screw shafts 4a and 1b.

In such a structure, when the cart 8 is moved within the cell 1a, when the motor 8a is driven, the gears 6 and 4a rotate via the bevel gears 7b and 7a, and the screw shaft 4 rotates, so that the screw shaft 4 is rotated. The trolley 8 moves. In this case, since the female threaded portion 9 and the support stand 5 are vertically divided into halves, the support stand 5 does not become an obstacle when the cart 8 moves. In addition, the rollers 12 of the guide 11 cause the cart to move smoothly on the rails 3 with no left and right wobbling due to the presence of the wheels 10.

When moving the cart 8 from the cell 1a to the cell 1b, if the cart 8 is moved in the direction of the arrow shown in FIG. The carriage 8 is further moved in the direction of the arrow (to the left) only by the female threaded portion 9 at the rear. As a result, while the front portion of the truck 8 passes through the cell wall and the shaft of the screw shaft 4 present in the cell 1b, the female threaded portion 9 at the front portion of the truck 8 connects to the thread of the screw shaft 4 in the cell 1b. They begin to interlock. At this time, it goes without saying that both the motors 8a of the cells 1a and 1b are operated synchronously. In this way, with the female threaded portion 9 at the front of the truck 8 meshing with the screw shaft 4 of the cell 1b, the female threaded portion 9 at the rear of the truck 8 is now separated from the screw shaft 4 of the cell 1a. By continuous rotation of the threaded shaft 4 in the cell 1b, the female threaded portion 9 at the rear of the truck 8 also meshes with the threaded shaft 4. FIGS. 7 and 8 show a part of this series of states. Cart 8 to cell 1
The same operation as described above occurs when returning from cell 1a to cell 1a.

In the above-mentioned embodiment, the screw shaft 4 was provided in each cell 1a, 1b, that is, the screw shaft 4 was interrupted at the cell wall, but the rail 3 was installed passing through the cell wall. In this case, the rail 3 is connected to the cells 1a and 1 as well as the screw shaft 4.
If the cell wall of the passage port 2 is made to protrude from the floor by the height of the rail 3, the cell wall will separate the cells 1a and 1b.
This is extremely suitable when the passage port 2 can be completely separated and the passage port 2 is sealed with a hard trap made of lead or the like. However, since the rails 3 are located on both sides of the passage opening 2, the passage opening 2 can be sealed very well even if only the screw shaft 4 is interrupted.

Further, in the above embodiment, the gears 6 and 7a are arranged below the screw shaft 4 so as not to obstruct the movement of the cart 8, and the Y-shaped support 5 is also half-shaped like the female thread part 9 so as not to come into contact with the female thread part 9. In addition, the bearings at both ends of the screw shaft 4 similar to the support base 5 are also recessed from the top of the screw shaft 4 so as not to collide with the female threaded portion 9.

As explained in the embodiments above, according to the present invention, maintenance is easy because the motor is installed outside the cell, and power supply equipment does not need to be placed inside the cell, preventing deterioration and making it convenient for safety. Moreover, even if the truck breaks down due to the structure of the half-split female threaded portion, the truck can be easily lifted up by a crane and carried out of the cell, and the passage port can be suitably sealed.

[Brief explanation of drawings]

1 to 8 show embodiments of the cart moving device of the present invention.
The figure is a partial side view, and Figure 3 is the first one mainly showing the trolley.
4 is a simplified configuration diagram of the truck, FIG. 5 is a sectional view of the truck seen from the front, FIG. 6 is a configuration diagram of an example of the female threaded part, and FIGS. 7 and 8 The figure is a configuration diagram for explaining the movement of the trolley. In the drawing, 1a and 1b are cells, 2 is a passage hole, 4 is a screw shaft, 5 is a support stand, 4a and 6 are gears, and 7a and 7
b is a bevel gear, 8 is a truck, 8a is a motor, 9 is a female threaded portion, 10 is a wheel, 12 is a roller, and 13 is a spring.

Claims (1)

[Scope of utility model registration request] In a device having a passage hole between a plurality of adjacent cells that can be sealed with the outside, a screw shaft is arranged for each cell, and a drive motor arranged outside each cell is connected to the screw shaft, and the screw shaft is connected to the drive motor arranged outside each cell. A cart moving device comprising a cart having a half-split screw at the bottom that engages with a shaft.