JP4419355B2 - Receiving crane trolley remote relief device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a trolley remote relief device for a receiving crane.
[0002]
[Prior art]
In recent years, high-level radioactive liquid waste has been mixed into molten glass, this molten glass is poured into a solidified container to solidify the glass, and radioactive waste liquid is contained in the glass to enable stable storage. It has been studied to form a vitrified body and store the vitrified body in a waste storage facility until the decay heat is removed.
[0003]
Since the vitrified substance emits a high amount of radiation, a receiving crane that is operated by remote control must be installed to transport the vitrified substance from the waste liquid treatment process that fills the molten glass into the solidified container into the waste storage facility. Will be used.
[0004]
[Problems to be solved by the invention]
When transporting the vitrified body to the waste storage facility, if the trolley traveling drive mechanism of the receiving crane fails and the trolley cannot travel, the vitrified body remains suspended from the trolley. In order to eliminate the state, it is necessary to push the trolley back to the receiving position on the side of the waste liquid treatment process by a method other than the installed traveling drive mechanism and collect the vitrified body.
[0005]
As a relief device for recovering the vitrified body when a failure occurs in such a travel drive mechanism, there is a method using a power manipulator.
[0006]
However, in order to use the power manipulator to move the trolley in which the vitrified body is suspended, it is necessary to make the scale of the apparatus very large, and the initial equipment cost and the operation and maintenance cost become high.
[0007]
Further, since the operation of the power manipulator requires skill, there is a concern that the trolley cannot be quickly pushed back to the loading position when a failure occurs in the travel drive mechanism.
[0008]
The present invention has been made in view of the above-described circumstances, and an object thereof is to provide a trolley remote relief device for a receiving crane that can easily move a trolley manually when a trolley traveling drive device fails. Yes.
[0009]
[Means for Solving the Problems]
In order to achieve the above object, in the trolley remote relief device for a receiving crane of the present invention, a trolley that suspends the vitrified body and moves along a traveling rail, a traveling drive shaft that extends in parallel along the movement path of the trolley, and The trolley is provided with a travel relief shaft, a travel nut screwed to the travel drive shaft, and a trolley that can be opened and closed by pushing and pulling the push-pull rod. By clamping the travel nut in the closed state, the power of the travel drive shaft is An opening / closing clamp for transmitting to the travel relief shaft, a rescue nut that is screwed to the travel rescue shaft and is movable in the axial direction along the guide rail by rotation of the travel rescue shaft, and has a lock hole on the upper surface, and the trolley. When the relief nut abuts against the stopper, the relief nut moves together with the relief nut, and pushes the push-pull rod to open the open / close clamp to open the travel nut clamp. A slide plate having an operation inclined surface that releases the lock, a lock hole formed in the slide plate at a position directly above the lock hole in the relief nut that is in contact with the stopper, and a trolley that is supported to be movable up and down. When the opening / closing clamp releases the traveling nut clamp by the movement of the slide plate, it falls into the lock hole of the slide plate and the lock hole of the relief nut and the trolley is rescued. And a lock pin that is connected to the main body.
[0010]
According to the trolley remote relief device for a receiving crane of the present invention, when the travel drive device fails and the travel drive shaft cannot be rotated and the trolley cannot be moved, the travel rescue shaft is rotated by operating the handle. When the relief nut is moved from the retracted position to the position of the trolley that is stopped, the slide nut is moved by the relief nut coming into contact with the stopper, and the opening / closing clamp is moved by the movement of the slide plate. The action of releasing the restraint in the state where the traveling nut is clamped, and the action of releasing the clamp of the traveling nut by opening the open / close clamp and releasing the connection between the trolley and the traveling drive shaft (cutting the edge) The action of connecting the trolley and the relief nut by the lock pin when the lock pin falls into the lock hole is automatically performed sequentially. Therefore, the operator without requiring the skill of what such is able to freely move the trolley by turning the handle, allows the relief operation of the trolley easily and quickly.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0012]
FIG. 1 is an overall schematic explanatory view showing an example of a receiving crane equipped with a trolley remote relief device of the present invention, in which 1 is a radioactive waste storage facility and 2 is installed in a radioactive waste storage facility 1. The receiving crane 3 is a vitrified material that has been processed in the waste liquid treatment process and conveyed to the vitrified material carrying-in hole 5 of the radioactive waste storage facility 1 by the carriage 4.
[0013]
The vitrified body 3 is lifted from the carriage 4 by a trolley 6 provided in the receiving crane 2 and is carried into the radioactive waste storage facility 1 from the vitrified body carry-in hole 5.
[0014]
The trolley 6 of the receiving crane 2 can travel along a traveling rail 7 fixed on the ceiling in the radioactive waste storage facility 1.
[0015]
Further, the radioactive waste storage facility 1 is provided with a travel drive shaft 8 and a travel rescue shaft 9 extending in parallel with the travel rail 7. Reference numeral 10 denotes a travel drive device that automatically rotates the travel drive shaft 8, 11 a handle that manually rotates the travel rescue shaft 9, and 12 a ceiling column that supports the travel drive shaft 8 and the travel rescue shaft 9.
[0016]
A travel nut 13 is screwed onto the travel drive shaft 8, and a clamp notch 14 as shown in FIGS. 2 and 5 is formed on the outer periphery of the travel nut 13.
[0017]
As shown in FIGS. 2 and 5, the trolley 6 is provided with an open / close clamp 15 that clamps the traveling nut 13 to restrain rotation. The open / close clamp 15 is pushed and pulled in the direction of A and A ′ perpendicular to the travel drive shaft 8 by pushing and pulling the push / pull rod 16 provided on the trolley 6, so that the travel nut 13 is sandwiched via the link 17. The clamp piece 18 is separated, and the clamp piece 18 is engaged with the clamp notch 14 of the travel nut 13 in the closed state to restrain the rotation of the travel nut 13, thereby driving the travel drive shaft. The power of 8 is transmitted to the trolley 6.
[0018]
On the other hand, as shown in FIGS. 2 to 4, a rescue nut 19 is screwed onto the travel rescue shaft 9, and the rescue nut 19 is moved along the guide rail 20 by the rotation of the travel rescue shaft 9. It can move in the B and B ′ directions. Further, a lock hole 21 is formed on the upper surface of the relief nut 19.
[0019]
As shown in FIGS. 2 and 3, on the support plate 22 of the trolley 6, there is provided a slide plate 24 that can slide in the B and B ′ directions parallel to the travel rescue shaft 9 along the guide member 23. Yes. The slide plate 24 is moved in the B direction together with the relief nut 19 when the relief nut 19 abuts against a stopper 25 (FIG. 2) provided at the lower end of the tip.
[0020]
The slide plate 24 is fixed to the end of the push-pull rod 16 and is formed with an L-shaped hook portion 26a formed on a sliding member 26 that can move in the A and A ′ directions on the support plate 22 of the trolley 6. A locking portion 27 that can be engaged is provided. That is, during the normal operation, the locking portion 27 of the slide plate 24 is engaged with the hook portion 26a, so that the opening / closing clamp 15 is held in the closed state (clamped state) and the traveling nut 13 is rotated. And the power of the travel drive shaft 8 is transmitted to the trolley 6. When the slide plate 24 is slightly moved in the B direction from the above-described locked state, the hook / pull rod 16 is unlocked when the hook portion 26a is pulled out from the locking portion 27.
[0021]
Further, when the slide plate 24 further moves in the B direction after the locked state is released, the slide member 26 is pushed in the A direction to release the travel nut 13 from being clamped by the open / close clamp 15. An actuated inclined surface 28 is formed. At this time, the push-pull rod 16 and the sliding member 26 can be moved in the A and A ′ directions, but are restrained by members (not shown) provided in the trolley 6 so that they cannot move in the other directions.
[0022]
Furthermore, a lock hole 29 is formed in the slide plate 24. The lock hole 29 is formed at a position directly above the lock hole 21 so as to coincide with the lock hole 21 provided in the relief nut 19 when the relief nut 19 abuts against the stopper 25.
[0023]
Furthermore, the lower end of the lock pin 30 supported by the trolley 6 so as to be movable up and down is placed on the slide plate 24, and the slide plate 24 is moved by the relief nut 19, via the operation inclined surface 28. When the opening / closing clamp 15 releases the clamp of the traveling nut 13, the lock hole 29 of the slide plate 24 and the lock hole 21 of the relief nut 19 are positioned directly below the lock pin 30, and the lock pin 30 is the lock hole 29, The trolley 6 and the relief nut 19 are connected to each other by the lock pin 30 by dropping to 21.
[0024]
The operation of the above embodiment will be described below.
[0025]
At the time of a normal operation of carrying the vitrified body 3 into the radioactive waste storage facility 1 or moving the vitrified body 3 by the receiving crane 2 shown in FIG. 1, a relief nut 19 provided on the traveling rescue shaft 9. Is retracted to a position close to the ceiling column 12 of FIG. 1 that does not interfere with the movement of the trolley 6. At this time, as shown in FIG. 6A, the slide plate 24 provided in the trolley 6 is in a state in which the push-pull rod 16 is moved in the A ′ direction and the hook portion 26a is locked to the locking portion 27. Therefore, the open / close clamp 15 shown in FIGS. 2 and 5 is held in the closed state to restrain the rotation of the traveling nut 13, so that the power of the traveling drive shaft 8 is transmitted to the trolley 6.
[0026]
From the above state, for example, in FIG. 1, when the travel drive device 10 breaks down during the conveyance of the vitrified body 3 and the travel drive shaft 8 cannot rotate and the trolley 6 cannot move, the following operation is performed. Relieve trolley 6.
[0027]
First, the rescue nut 19 is moved in the B direction by rotating the travel rescue shaft 9 by manually rotating the handle 11 of FIG.
[0028]
When the relief nut 19 is moved in the B direction, the relief nut 19 comes into contact with the stopper 25 of the slide plate 24 provided on the trolley 6. At this time, the lower end of the lock pin 30 supported by the trolley 6 so as to be movable up and down is placed at the front position in the B direction of the lock hole 29 above the stopper 25 of the slide plate 24.
[0029]
When the relief nut 19 is further moved in the direction B from the state in which the relief nut 19 is in contact with the stopper 25, the slide plate 24 is moved together with the relief nut 19. Then, as shown in FIG. 6A, the hook portion 26a of the sliding member 26 integrated with the push-pull rod 16 is locked to the locking portion 27, and the open / close clamp 15 is restrained to the closed state. As shown in FIG. 6B, the hook portion 26a is separated from the locking portion 27 and the restraint is released.
[0030]
Further, when the relief nut 19 is moved in the B direction, the sliding member 26 is pushed in the A direction by the operation inclined surface 28 formed on the slide plate 24 as shown in FIG. As shown in FIG. 2, the open / close clamp 15 is opened, and the clamp of the traveling nut 13 is released. Thereby, the connection between the trolley 6 and the travel drive shaft 8 is released.
[0031]
Further, by the movement of the slide plate 24 in the B direction, as shown in FIG. 6D, the lock hole 29 of the slide plate 24 and the lock hole 21 of the relief nut 19 are positioned directly below the lock pin 30. Thus, the lock pin 30 falls into the lock holes 29 and 21, and the trolley 6 and the relief nut 19 are connected by the fall of the lock pin 30.
[0032]
Therefore, after that, the trolley 6 connected to the rescue nut 19 via the lock pin 30 is freely moved in the B and B ′ directions by rotating the travel rescue shaft 9 by operating the handle 11 of FIG. You can move.
[0033]
As described above, when the travel drive device 10 breaks down and the travel drive shaft 8 cannot rotate and the trolley 6 cannot be moved, the travel rescue shaft 9 is rotated by operating the handle 11. When the relief nut 19 is moved from the retracted position and moved to the position of the trolley 6 that is stopped, the slide nut 24 comes into contact with the stopper 25 and the slide plate 24 is moved. Thus, the action of releasing the restraint of the state in which the opening / closing clamp 15 clamps the traveling nut 13 and the opening / closing clamp 15 are opened to release the clamping of the traveling nut 13, and the trolley 6 and the traveling drive shaft 8 are With the action of releasing the connection, the lock pin 30 falls into the lock holes 29 and 21, and the trolley 6 and the relief nut 19 are moved by the lock pin 30. Action for connecting becomes to be sequentially automatically performed. Therefore, the operator can move the trolley 6 freely by turning the handle 11 without requiring any skill, and the relief operation of the trolley 6 can be performed easily and quickly.
[0034]
In addition, the trolley remote relief device for the receiving crane of the present invention is not limited to the above-described embodiment, and it is needless to say that various modifications can be made without departing from the gist of the present invention.
[0035]
【The invention's effect】
As described above, according to the trolley remote relief device of the receiving crane of the present invention, when the travel drive device fails and the travel drive shaft cannot be rotated and the trolley cannot be moved, the handle is operated. When the travel nut is moved from the retracted position by rotating the travel rescue shaft and moved to the position of the trolley that is stopped, the slide nut is moved by contacting the stopper with the stopper nut. The action of releasing the restraint of the state where the open / close clamp clamps the traveling nut by moving, the action of releasing the clamp of the traveling nut by opening the open / close clamp, and cutting the edge of the trolley and the traveling drive shaft The action of connecting the trolley and the relief nut by the lock pin when the lock pin falls into the lock hole is automatically performed sequentially. Therefore, without the operator can take anything like skilled, the trolley by turning the handle can be moved freely, it is easily and quickly perform effective relief operation of the trolley.
[Brief description of the drawings]
FIG. 1 is an overall schematic explanatory view showing an example of a receiving crane provided with a trolley remote relief device of the present invention.
FIG. 2 is a perspective view showing the operation of main components in the trolley remote relief device of the present invention.
FIG. 3 is a cut front view of FIG. 2;
4 is a view taken in the direction of arrows IV-IV in FIG. 3;
FIG. 5 is a front view showing the operation of the open / close clamp.
6A, 6B, 6C, and 6D are action explanatory views showing the movement of the slide plate and the relation between the push-pull rod and the relation between the lock hole and the lock pin.
[Explanation of symbols]
3 Vitrified body 7 Traveling rail 8 Traveling drive shaft 9 Traveling rescue shaft 13 Traveling nut 15 Opening / closing clamp 16 Push-pull rod 19 Relief nut 21 Lock hole 24 Slide plate 25 Stopper 28 Operating inclined surface 29 Lock hole 30 Lock pin

Claims (1)

A trolley that suspends the vitrified body and moves along the travel rail, a travel drive shaft and a travel rescue shaft that extend in parallel along the travel path of the trolley, a travel nut that is screwed to the travel drive shaft, and a push-pull The trolley is provided with a trolley that can be opened and closed by pushing and pulling the rod, and an open / close clamp for transmitting the power of the traveling drive shaft to the trolley by clamping the traveling nut in the closed state, A relief nut that is movable in the axial direction along the guide rail by rotation and has a lock hole on the upper surface, and is provided in the trolley, and the relief nut moves together with the relief nut by contacting the stopper. A slide plate having an operation inclined surface which pushes the push-pull rod to open the open / close clamp to release the travel nut clamp, and a stopper A lock hole formed in the slide plate at a position directly above the lock hole in the abutting relief nut, and supported on the trolley so as to be vertically movable and placed on the slide plate, and the opening / closing clamp is moved by the movement of the slide plate And a lock pin that drops into the lock hole of the slide plate and the lock hole of the relief nut when the travel nut is clamped to connect the trolley to the relief nut. Crane trolley remote relief device.

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