JPH0312801Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a rail folding device installed in an openable and closable passageway.

(Prior art) In nuclear plants, during periodic inspections, large heavy objects such as main coolant pump motors, which are several meters high and weigh several pieces, are carried in and out of the equipment entrance of the reactor containment vessel. Therefore, the concrete shielding wall and the reactor containment vessel side cover were removed to create a passageway for carrying in and out of large and heavy objects. In addition, large and heavy items to be carried in and out after that were placed on a trolley, and the trolley was run on the rails using an air winch for running the trolley (or a manual winch for running the trolley). In addition, once loading and unloading of large heavy objects is completed, place the rail storage jig on the trolley, drive the trolley to the loading/unloading passage, and use the rail storage jig to flip up the rails in the loading/unloading passage. Then, the concrete shielding wall and the reactor containment vessel side lid were closed.

(Problem to be solved by the invention) The rails laid in the conventional loading/unloading passage require space to store the trolleys, and if there is no space to store the trolleys, it is necessary to store the rails. A problem was occurring.

The present invention addresses the above-mentioned problems, and includes a fixed rail fixed to the center of the openable and closable passage;
A pair of movable rails pivotably supported at both ends of the fixed rail, a pulley support column detachably erected on the fixed rail, a winch, and a pulley of the pulley support column from the winch. A rail comprising: a wire that extends through the movable rail and whose tip end is detachably attached to the movable rail; and a rail holding member on the pulley support column side that holds the movable rail in an upright position. The purpose of the folding device is to provide a rail folding device that is capable of folding rails laid in an openable and closable passageway without the need for a trolley, thereby eliminating the need for space for the trolley. The point is that it provides

(Means for Solving the Problems) The rail folding device of the present invention has a fixed rail fixed to the center of the passageway that can be opened and closed as described above, and a pivotable structure that can be raised and lowered at both ends of the fixed rail. a pair of movable rails, a pulley support column detachably erected on the fixed rail, a winch, and a winch extending from the winch to the movable rail via the pulley of the pulley support column, the distal end of which is movable. It is equipped with a wire that can be detachably attached to the rail and a rail holding member on the pulley support column side that holds the movable rail in an upright position.When the passage is opened, the pulley support column is attached to the central fixed rail. The wire is extended from the winch through the pulley of the pulley support column to one of the movable rails, the tip of the wire is detachably attached to the movable rail, the winch is driven in the unwinding direction, and the wire is extended from the winch to the movable rail. The fixed rail in the center of the aisle is connected to the fixed rail on one side outside the aisle by the same movable rail, and then the wire is extended from the winch through the pulley of the pulley support column to the other movable rail, and the tip of the wire is removably attach the part to the movable rail, drive the winch in the rewinding direction, lower the movable rail, connect the fixed rail in the center of the aisle and the other fixed rail outside the aisle by the same movable rail, and wire And the pulley support column can be removed to allow large and heavy objects to be carried in and out. When loading and unloading is completed, drive the winch in the same manner as in the hoisting direction, raise and fold one and the other movable rails, and hold each movable rail in the same raised position by the rail holding member of the pulley support column. and remove the wire to allow closure of the passageway. Therefore, the rails laid in the openable and closable passage can be folded up without the need for carts, and the space for storing the carts becomes unnecessary.

(Embodiment) Next, the rail folding device of the present invention will be explained using an embodiment shown in FIGS. 1 to 3. A is the reactor containment vessel side, B is the main coolant pump inspection area side, 13 is the lid of the reactor containment vessel, and 14 in FIGS. 2 and 3 is a removable concrete shielding wall for the main cooling pump inspection area B, and there is a passageway between these lids 13 and the concrete shielding wall 14 that can be opened and closed. is formed. In addition, 11 is a fixed rail fixed to the center of the passageway that can be opened and closed, 9 and 10 are a pair of movable rails that are pivotably supported at both ends of the fixed rail 11, and 12a is the reactor containment vessel side A.
12b is a fixed rail on the main coolant pump inspection area side B, 2 is a pulley support column that is removably installed on the fixed rail 11, 1 is a manual winch, and 7 is a fixed rail from the winch 1. 12b
The movable rail 9 is connected via the pulley 4 on the side, the pulley 5 on the fixed rail 11 side, and the pulley 6 of the pulley support column 2
(or 10) and the tip end is the same movable rail 9
(or 10) a wire removably attached to the
3 is a rail holding member on the pulley support column 2 side that holds the movable rails 9 and 10 in the upright position, and 8 is a wire attachment fitting provided on the movable rails 9 and 10.

(Function) Next, the function of the rail folding device will be explained. When the lid 13 on the reactor containment vessel side A and the concrete shielding wall 14 on the main cooling pump inspection area side B are removed and a loading/unloading passage is formed between them,
The pulley support column 2 is erected on the central fixed rail 11, and the wire 7 is extended from the winch 1 through the pulley 6 of the pulley support column 2 to one movable rail 10.
The tip of the wire 7 is detachably attached to the movable rail 10, and the winch 1 is driven in the rewinding direction.
The movable rail 10 is laid down, the fixed rail 11 in the center of the passage and the fixed rail 12b on one side outside the passage are connected by the movable rail 10, and then the wire 7
is extended from the winch 1 to the other movable rail 9 via the pulley 6 of the pulley support column, the tip of the wire 7 is detachably attached to the movable rail 9, the winch 1 is driven in the rewinding direction, and the same The movable rail 9 is laid down and the fixed rail 11 in the center of the passage is connected to the other fixed rail 12a outside the passage by the same movable rail 9, and then the wire 7 and the pulley support column 2 are removed to carry in and out large heavy objects. (See Figure 1). When loading and unloading is completed, the pulley support column 2 is erected on the central fixed rail, and the wire 7
is extended from the winch 1 to the other movable rail 9 via the pulley 6 of the pulley support column 2, and the tip of the wire 7 is detachably attached to the movable rail 9, and the winch 1 is driven in the hoisting direction. The movable rail 9 is erected (see Fig. 1), the movable rail 9 is held in the upright position by the rail holding member 3 on the pulley support column 2 side (see Fig. 1), and then the wire 7 is passed from the winch 1 to the pulley. The wire 7 is extended to one movable rail 10 through the pulley 6 of the support column 2, and the tip of the wire 7 is detachably attached to the movable rail 10 (see Fig. 2), and the winch 1 is driven in the hoisting direction.
The movable rail 10 is erected, and the movable rail 1 is
0 is held in the upright position by the rail holding member 3 on the pulley support column 2 side (see FIG. 2), and the wire 7 is removed (see FIG. 2) to allow the passage to be closed.

(Effect of the invention) As mentioned above, the rail folding device of the invention includes a fixed rail fixed to the center of the passageway that can be opened and closed, and a pair of movable rails that are pivotally supported at both ends of the fixed rail so that they can be raised and lowered. a rail; a pulley support column detachably erected on the fixed rail; a winch; a winch extending from the winch to the movable rail via the pulley of the pulley support column and having a distal end detachably attached to the movable rail; It is equipped with a wire to be attached and a rail holding member on the pulley support column side that holds the movable rail in an upright position.When the passage is opened, the pulley support column is erected on the central fixed rail, and the wire is extended from the winch to one movable rail through the pulley of the pulley support column, the tip of the wire is detachably attached to the movable rail, the winch is driven in the unwinding direction, the movable rail is laid down, Connect the fixed rail in the center of the aisle and the fixed rail on one side outside the aisle using the same movable rail, then extend the wire from the winch through the pulley of the pulley support column to the other movable rail, and connect the tip of the wire to the other movable rail. The winch is driven in the unwinding direction, the movable rail is laid down, the fixed rail in the center of the aisle is connected to the other fixed rail outside the aisle by the movable rail, and the wire and pulley support column are connected. It can be removed to allow loading and unloading of large and heavy objects. When loading and unloading is completed, drive the winch in the same manner in the hoisting direction, raise and fold one movable rail, and hold each movable rail in the same raised position using the rail holding member of the pulley support column. , remove the wire to allow closure of the passageway. Therefore, the rails laid in the openable and closable passage can be folded up without the need for a trolley, thereby making it possible to eliminate the need for space for the trolley.

[Brief explanation of the drawing]

FIG. 1 is a side view showing a movable rail in a collapsed state of an embodiment of the rail folding device according to the present invention; FIG. 1 is a side view showing how to raise one movable rail; FIG. FIG. 3 is a side view showing how to raise the movable rail, and FIG. 3 is a plan view showing the movable rail in a collapsed state. DESCRIPTION OF SYMBOLS 1... Winch, 2... Pulley support pillar, 3... Rail holding member, 4, 5, 6... Pulley, 7... Wire, 9 10... Movable rail, 11... Fixed rail.

Claims (1)

[Scope of utility model registration request] A fixed rail fixed to the center of the passageway that can be opened and closed, a pair of movable rails pivotably supported at both ends of the fixed rail, and a pulley support column detachably erected on the fixed rail. And a winch,
a wire extending from the winch to the movable rail via the pulley of the pulley support column and having a tip end removably attached to the movable rail; and a rail holding member on the pulley support column side that holds the movable rail in an upright position. A rail folding device characterized by comprising: