JP2793355B2 - Hanging equipment - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lifting device for lifting a cylindrical or columnar load such as a drum filled with low-level radioactive waste or the like.

"Prior art" As is well known, low-level radioactive waste from nuclear power plants, etc. is enclosed in drums, transported to a burying facility by a dedicated ship, etc., and placed in a concrete container provided in this facility. Is carried in using a crane. At the tip of the crane, a lifting tool for lifting the drum can is attached.

Conventionally, as an example of this hanging tool, the one shown in FIG. 6 has been provided.

That is, in the drawing, reference numeral 1 indicates a beam. The beam 1 is attached to a crane or the like and provided so as to be able to move up and down. A vertical shaft 2 is fixed to the beam 1. The proximal ends of the pair of links 3, 3 are rotatably connected to the distal end of the vertical shaft. These links 3, 3 are long electric cylinders, and forks 4, 4 are rotatably attached to the distal ends of the piston rods 3a, 3a of these cylinders. These forks 4, 4 have an arc shape, and the radius of curvature is set to be substantially the same as that of the drum to be lifted.

A base end of a link 5 is rotatably connected to a lower end of the vertical shaft 2. A distal end of the link 5 is adapted to move the forks 4, 4 along a drum body of a drum. A guide sheath 6 for guiding is rotatably connected. The guide sheath 6 has a radius of curvature substantially equal to that of the forks 4, 4 so that the forks 4, 4 can be inserted and removed.

Then, in order to lift the drum K by the hanging tool having the above configuration, the beam 1 is lowered and the guide sheath 6 is moved to the drum K.
Then, the piston rods 3a, 3a are extended. Then, the forks 4, 4 move along the body of the drum K, and after the respective tips of the forks 4, 4 move to a predetermined position in the lower half of the body of the drum K, the beam 1 is raised. Thus, the drum K is lifted.

[Problem to be Solved by the Invention] However, in the hanging tool having the above configuration, the drum K to be lifted is slightly inclined with respect to a predetermined position in a horizontal plane, that is, the drum can K includes the axis of the vertical shaft 2 and a pair of links. If the axis of the drum K is not parallel and intersects at a slight angle with the plane equidistant from 3,3, or if the axis of the drum K is slightly inclined with respect to the horizontal plane, the beam 1 is lowered. When the tip of the hanging tool, that is, the forks 4, 4 abut on the body of the drum K, the forks 4, 4 are positioned so as to be twisted with respect to the drum K, and the forks 4, 4 are linked with the links 3, 4. Since the vertical shaft 2 connected via 3 is fixed to the beam 1, an excessive force acts on the forks 4, 4 to damage the forks 4, 4 and the drum K, or There may be cases where it cannot be held securely There was a problem.

An object of the present invention is to solve the above problems.

"Means for Solving the Problems" In order to achieve the above object, the hanging device of the present invention attaches a vertical axis to a beam provided to be able to move up and down, and attaches the base ends of a pair of links to this vertical axis. A fork that is connected rotatably and has a circular or arc shape with the same radius of curvature as a cylindrical or columnar load (drum can) to be lifted at the tip of the pair of links can be moved along the body of the load. And the vertical axis is connected to the beam so as to be able to move up and down freely and to be rotatable and tiltable around the axis when the vertical axis is elevated by a predetermined amount with respect to the beam.

[Operation] In the lifting device of the present invention, when the tip of the lifting device contacts the body of the load (drum can) to be lifted and the vertical axis rises, the vertical axis can rotate around the axis. If the axis of the drum to be lifted crosses at a slight angle instead of parallel to a plane that includes the vertical axis and is equidistant from the pair of forks, or the axis of the drum can The vertical axis rotates along the drum when the tip of the hanging tool abuts against the drum, so that the fork moves in a plane perpendicular to the axis of the drum. As it is located and the vertical axis is inclined along the drum, when the drum is gripped, no excessive force acts on these forks, and therefore the drum can is reliably prevented from being damaged or the like. Can be gripped.

Further, when the drum can held by the fork is lifted by lifting the beam, the vertical axis to which the fork is connected is fixed with respect to the beam. The attitude of the drum can can be maintained without being affected by imbalance.

Further, even when the suspended drum can is landed, the vertical axis rises with respect to the beam, so that the drum can be rotated and tilted around the axis.For example, when stacking drums, the drums stacked on the floor or the like can be used. Even if the drums are slightly inclined as described above, the drums to be stacked along the inclined drum can rotate and tilt with the vertical axis, so that the drums can be reliably stacked without being deformed.

"Embodiment" One embodiment of the hanger of the present invention will be described below with reference to Figs.

In these figures, reference numeral 10 indicates a frame pair (beam).
The frame 10 is provided so as to be able to travel, traverse, and ascend and descend from a wire rope drawn out from a club trolley (not shown) or the like. Guide rollers 11, 11 for rotating and slidingly contacting the wall when the frame 10 is moved up and down along the wall are guided on both right and left sides of the frame 10 in FIG. Attached to.

Eight vertical shafts 15 are attached to the frame 10 at equal intervals in the horizontal direction. The vertical shaft 15 is connected to the frame 10 so as to be able to move up and down and the vertical shaft 15 is rotatable around the axis and tiltable when the vertical shaft 15 rises by a predetermined amount with respect to the frame 10. Before each vertical axis
A mechanism for gripping the drum attached to 15 will be described.

That is, as shown in FIGS. 2 and 3, a supporting member 18 is loosely inserted into the upper end of the vertical shaft 15 and supported by a boss 18a fixed immediately below so as not to descend and swing freely. Have been. A connection fitting 19 is rotatably attached to the support member 18.

The base ends of the pair of first links 20 and 20 are rotatably connected to the connection fitting 19. The base ends of the pair of second links 22 and 22 are connected to the distal ends of the first links 20 and 20. The parts are rotatably connected. Each first link 20 includes a rod 20a connected to the connection fitting 19 and a rod 20b connected to the second link 22.
And an adjusting nut 20c which is screwed to and connected to the threaded portions of the rods 20a and 20b. The length of the first link 20 can be adjusted by the adjusting nut 20c.

Two legs 22a, 22b are formed at the tip of each of the second links 22, 22, and each leg 22a, 22b is formed.
Are connected to the center and rear ends of the sheath-shaped fork holders 24, 24, each of which has an arc shape having substantially the same radius of curvature as the drum can K to be lifted. Each fork holder 24
A fork 25 is provided movably along the body of the drum K.

That is, the fork 25 has an arcuate slide member 26 movably inserted into the fork holder 24 from the distal end opening thereof along the body of the drum can K, and an arcuate slide member 26 provided at the distal end of the slide member 26. Of the fork claw 27 by the movement of the slide member 26.
Moves along the body of the drum K.

Between the forks 25, 25 and the second links 22, 22, a pair of hydraulic cylinders (expandable portions) 30, 30 are disposed so as to cross each other. The cylinder body of this cylinder 30
30a is rotatably connected to the proximal end of the second link 22, and the cylinder shaft 30b is rotatably connected to the distal end of the slide member 26 of the fork 25. And the cylinder shaft
By expanding and contracting 30b, the fork 25 moves along the body of the drum K. Eight sets of hydraulic units U for operating the cylinders 30 are provided on the frame 10. (See FIG. 1.) Further, the central portions of the pair of fork holders 24, 24 are rotatably supported by a horizontal shaft 31 orthogonal to the vertical shaft 15, respectively. As shown in FIG. 4, a ring 32 having a flat portion on the outer peripheral portion is fixed to the horizontal shaft 31. The flat portion of the ring 32 has an engaging portion formed at the lower end of the vertical shaft 15. 33 are slidably engaged up and down.

In addition, the vertical shaft 15 located below the boss 18a has
As shown in FIG. 5, a moving body 35 is vertically movably provided with a slight gap between the moving body 35 and the boss 18a. Connecting brackets 36, 36 are provided at both ends of the moving body 35 in the horizontal direction.
Are attached rotatably, and these connecting brackets 36, 36
The base ends of the third links 37, 37 are rotatably connected to, respectively. The lower ends of the third links 37, 37 are rotatably connected to the horizontal shaft 31 (see FIG. 5). Further, as shown in FIG. 5, a recess 38 is formed in the lower end surface of each third link 37, and a contact plate 39 for contacting the drum K is formed with a hole 39a formed in the recess. It is provided for 38. In the recess 38, a proximity switch 40 for stopping the lowering is provided so as to face the body of the drum K.

As shown in FIG. 4, a fixed plate 45 is fixed to the vertical shaft 15 located below the moving body 35 at a predetermined interval from the moving body 35. A pair of hydraulic cylinders 46, 46 are attached to the fixed plate 45 in the vertical direction, and the piston rods 46a, 46a of these hydraulic cylinders 46, 46 are mounted.
Is expanded and contracted and comes into contact with and separates from the moving body 35,
The movement of the moving body 35 toward the lower end of the vertical shaft 15 is restricted or enabled.

In addition, the hanging device having the above configuration is provided with the following proximity switch in addition to the proximity switch 40 for stopping the lowering.

That is, as shown in FIG. 3, L-shaped fittings 55, 55 for preventing the drum can K from moving in the axial direction are attached to both ends of the horizontal shaft 31, and one of the fittings 55 A proximity switch 56 for lowering and lowering the vehicle is attached. As shown in FIG. 4, a proximity switch 57 for detecting landing on the drum can is provided on the boss 18a provided on the vertical shaft 15.

Next, a mechanism for connecting the vertical shaft 15 to the frame 10 will be described.

That is, as shown in FIG. 2 and FIG.
, Eight rectangular parallelepiped fixing blocks 60 are fixed at positions corresponding to the vertical axes 15. On the upper surface of the fixed block 60, an engagement hole 61 penetrating to the lower surface is formed.

The engaging hole 61 is formed by cutting out the upper surface of the fixed block 60 in a quadrangular pyramid shape, and the inner surfaces facing each other are formed so as to gradually approach downward.

On the other hand, an engagement block 62 is engaged with each of the engagement holes 61. The engagement block 62 has a truncated quadrangular pyramid shape, and is formed such that each side surface is in close contact with the inner side surface of the engagement hole 61.

The engaging block 62 is formed with a through-hole penetrating in the vertical direction. The upper end of the vertical shaft 15 is inserted into the through-hole and fixed by a nut 64, so that the engaging block 62 has a vertical shaft. 15 are installed.

The vertical shaft 15 has an engagement block 62 formed with an engagement hole 61.
In a state in which it is in close contact with the frame body 10, it is engaged so as not to be able to move below the frame body 10 and to be unable to rotate and tilt about the axis, and
When the engagement block 62 is a predetermined amount, that is, when the contact plate 39 comes into contact with the body of the drum and the vertical shaft 15 rises by a predetermined amount and its side surface is separated from the inner surface of the engagement hole 61 by a predetermined amount, The above-mentioned engagement is released, so that it is rotatable about the axis and tiltable.

Next, a method of hoisting a drum can with the hoist of the above configuration will be described.

First, the frame 10 is wound down at a high speed from the top dead center.
When the frame body 10 descends and the metal fitting 55 descends to a position very close to the drum K, the proximity switch 56 provided on the metal fitting 55 for deceleration and deceleration detects this, and the lowering speed is reduced.

Further, when the frame 10 descends at this low speed, a part of the contact plate 39 provided on the lower end surface of the third link 37, or the fork claw 27 or the metal fitting 55 at the tip of the fork 25 in a contracted state. When the shaft comes into contact with the drum K, the vertical shaft 15 is raised by a predetermined amount via the third link 37 or the like, whereby the side surface of the engagement block 62 is separated from the inner surface of the engagement hole 61 by a predetermined amount. The engagement between the engagement block 62 and the engagement hole 61 is released. As a result, the entire hanging tool is aligned with the drum K which is rotated and inclined and is combined with the drum K, so that the contact plate 39 is securely brought into contact with the body of the drum K. Then, the proximity switch 40 for stopping the lowering senses this, and the lowering of the frame 10 is stopped.

In this way, the vertical shaft 15 can be rotated and tilted around the axis, so that the axis of the drum K to be lifted includes the axis of the vertical shaft 15 and is equidistant from the pair of forks 25, 25. When the axis of the drum K is slightly inclined with respect to the horizontal plane when it is not parallel and intersects at a slight angle, the vertical shaft 15 is , Whereby the forks 25, 25 are located in a plane perpendicular to the axis between the drums and tilt along the drums K.

During the above operation, the cylinders 30, 30 for moving the forks 25, 25 are in a contracted state, and the hydraulic cylinder 4
6, 46 piston rods 46a, 46a are in contact with the moving body 35.

Next, the cylinder shaft 30b of the cylinder 30, 30 is extended. Then, the slide members 26 in the fork holders 24, 24,
26 rotates around the axis of the drum K in opposite directions, and the fork claws 27 provided at the distal ends of the slide members 26 rotate along the body of the drum K. Thereby, the body of the drum K is wrapped by the fork claws 27,27. At this time, there is a slight gap between the fork claws 27, 27 and the body of the drum K.

Next, the piston rods 46a, 46a of the hydraulic cylinders 46, 46
Is moved downward to allow the moving body 35 to move to the lower end side of the vertical shaft 15, and then the frame 10 is wound up at a low speed.

Then, the engaging block 62 is engaged with the engaging hole 61, whereby the vertical shaft 15 rotates around the axis to the original position and restores the inclination, and accordingly, the drum rotates in the horizontal plane and restores the inclination. I do.

Further, the vertical axis 15 is raised by winding up the frame 10. Then, since the moving body 35 can be moved to the lower end side of the vertical shaft 15, the moving body 35 stops at a certain distance from the drum K even if the vertical shaft 15 is raised to some extent. The horizontal shaft 31 connected to the body 35 via the third link 37 is also stopped. Therefore, the fork holder 24 supported by the horizontal shaft 31 is also stopped.

On the other hand, due to the rise of the vertical shaft 15, the respective base ends of the first links 20, 20 connected thereto rise, and accordingly, the respective front ends rotate and approach to each other, and The base ends of the connected second links 22 and 22 rotate close to each other. Along with this, the leg 22 at the tip of the second link 22
b, 22b rotate upward with the horizontal shaft 31 as a fulcrum, whereby the fork holders 24, 24 rotate with the horizontal shaft 31 as a fulcrum in a direction in which the tips approach each other, and the fork pawl 2
7 and 27 are rotated so as to approach each other with the horizontal shaft 31 as a fulcrum, pressed against the body of the drum K, and wrapped around it.

Further, when the vertical shaft 15 is raised to release the drum K from the floor, the weight of the drum K is transferred to the forks 25, 25 via the links and the fork holders 24, 24, like the tongs used for transporting ice or the like. Acting in the direction of approaching each other, the drum can K is further nipped and held by the fork claws 27, 27 at the tips.

Then, after winding up the frame body 10 at a low speed to a predetermined position, the frame body 10 is wound up at a high speed to a top dead center. The switching of the winding speed is performed by a winding encoder.

Further, when the drum can K held by the forks 25, 25 is lifted by raising the frame 10, the vertical shaft 15 to which the forks 25, 25 are connected is fixed to the frame 10, Inside, the attitude of the drum can is maintained without being affected by the unbalanced load due to the unbalanced load of the drum K and the inertia force during the loading operation.

Furthermore, to lower the suspended drum K, the frame
10. Lower the drum K in order of high speed and low speed, and land it on the drum K. When the drum K arrives on the floor, the moving body 35 approaches the boss 18a by the lowering of the vertical shaft 15 via the third link 37 provided with the contact plate 39, and the proximity switch 57 detects this and lowers the lower body. Stop.

At this time, since the engagement block 62 is disengaged from the engagement hole 61, the vertical shaft 15 can rotate around the axis. Therefore,
For example, when the drums K are stacked, if the drums K stacked on the floor or the like are slightly inclined in the horizontal plane, or if the axis of the drum can K is slightly inclined with respect to the horizontal plane, the drums K may be moved along the inclined drum can. Since the drums K to be stacked are rotated together with the vertical shaft 15 and tilted, the drums K can be reliably stacked. When the drums K stacked on the floor or the like are not inclined, the drums K can be accurately stacked at a predetermined position as a matter of course.

Then, after the piston rods 46a, 46 are brought into contact with the moving body 35, the cylinder shafts 30b, 30b of the cylinders 30, 30 are contracted to separate the fork claws 27, 27 from each other along the body of the drum K. To release the grip on the drum,
The frame 10 is raised at a high speed.

According to the above-mentioned hanging tool, the engaging block 62 attached to the vertical shaft 15 has a truncated quadrangular pyramid shape, and this engaging block 62 is engaged with the engaging hole 61 of the fixed block 60 provided in the frame 10. By connecting the vertical axis 15 and the frame body 10, the vertical axis 15 can be freely moved up and down on the frame body 10, and can be rotated around the axis when the vertical axis 15 rises a predetermined amount with respect to the frame body 10. And because it was made to be able to tilt, when the contact plate 39 etc. abuts on the body of the drum to be lifted and the vertical shaft 15 rises,
The vertical shaft 15 is rotatable and tiltable around the axis.

Therefore, the axis of the drum to be lifted is
If the axis of the drum can K is not parallel and intersects at a slight angle with respect to a plane containing 15 axes and equidistant from the pair of forks 25, 25, or if the axis of the drum can K is inclined with respect to the horizontal plane, Vertical axis due to contact of drum 39 with contact plate 39 etc.
15 rotates and tilts along the drum, so that the forks 25, 25 are located in a plane perpendicular to the axis of the drum and tilt along the drum K,
When the drum can K is gripped, no excessive force acts on these forks 25, 25, so that the drum can K can be reliably gripped without causing damage to the drum can K.

Also, when the lifted drum can K is landed, the engagement block 62 is disengaged from the engagement hole 61, and the vertical shaft 15 can rotate and tilt around the axis.For example, when stacking drums, Even if the drums stacked on the floor or the like are slightly inclined in the horizontal plane, the drums to be stacked rotate along the inclined drums together with the vertical shaft 15, so that the drums can be reliably stacked. When the drums K stacked on the floor or the like are not inclined, the drums K can be accurately stacked at a predetermined position as a matter of course.

Further, fork claws 27 of the arc-shaped forks 25, 25,
Since the body of the drum can K is grasped so as to be wrapped by 27, the drum can K can be grasped and lifted more safely than, for example, one that clamps a top plate and a bottom plate.

In addition, the first link is connected to the vertical shaft 15
20 and 20 and connect the first link 20 and 20 to the second link 22 and 2
2 and connect the fork holders 24,2 to the second links 22,22.
The fork holders 24, 24 are provided with forks 25, 25 having an arc shape having substantially the same radius of curvature as the drum can K so as to be movable along the body of the drum can K.
And the second links 22 and 22 are connected by cylinders 30 and 30,
Due to the extension of the cylinders 30, 30, the forks 25, 25 are moved along the body of the drum K to wrap the body,
By raising 15, the own weight of the drum can K acts on the forks 25, 25 in the direction of bringing them closer to each other, like a tong used for transporting ice or the like, via the link mechanism as described above. Since the gripping force is obtained, a driving source for gripping the drum can K is not required, and the drum can K can be reliably gripped only by raising the vertical shaft 15.

Further, a moving body 35 is provided on the vertical axis 15 so as to be vertically movable,
By engaging with the moving body 35, the movement of the moving body 35 to the lower end side of the vertical shaft 15 is restricted, and the moving body 35 is detached from the moving body 35.
Hydraulic cylinder that allows the vertical shaft 15 to move toward the lower end
The third link 37 is connected to the moving body 35, the horizontal shaft 31 connecting the fork holders 24, 24 is connected to the third link 37, and the drums K
After wrapping the torso of the fork 25, 25, the piston rods 46a, 46a of the hydraulic cylinders 46, 46 were removed from the moving body 35 so that the moving body 35 did not rise with the rise of the vertical shaft 15. Before fork 2 is pressed against the body of drum K
5,25 does not rise and does not damage the drum K,
In addition, since the forks 25, 25 rise after being pressed against the drum K, the drums having slightly different diameters can be reliably gripped and lifted.

In the above embodiment, as a mechanism for connecting the frame 10 and the vertical shaft 15, an engagement hole 61 formed by cutting the fixed block into a truncated quadrangular pyramid in a fixed block 60 provided on the frame 10.
In this engagement hole 61, a quadrangular pyramid-shaped engagement block 62 attached to the vertical shaft 15 is engaged, but without being limited to this, for example, the engagement block is formed in a conical shape. The engaging block is formed with a ridge extending in the generatrix direction on the side surface, or formed into a cone having an elliptical cross section, a cone having a polygonal cross section, or a cone having a star cross section. The mating holes may be formed in shapes corresponding to these. In short, when the mating block engages with the mating hole, the mating block cannot rotate or tilt, and the mating block has a vertical axis. What is necessary is just to make it rotatable and tiltable by a predetermined amount around the axis when the engagement is released by being raised by the lift.

[Effects of the Invention] As described above, according to the hanging device of the present invention, the vertical axis can be freely moved up and down to the beam, and can be rotated around the axis when the vertical axis is moved up by a predetermined amount with respect to the frame beam. Drums (load) to be lifted because it can be tilted
When the tip of the hanging tool comes into contact with the trunk of the vehicle and the vertical axis rises, the vertical axis can be rotated around the axis and tilted.

Accordingly, when the axis of the drum to be lifted includes the axis of the vertical axis and intersects at a slight angle rather than parallel to a plane equidistant from the pair of forks,
If the axis of the drum can is slightly inclined with respect to the horizontal plane, the vertical axis rotates along the drum when the tip of the hanging tool abuts the body of the drum, so that the fork is orthogonal to the axis of the drum. Because it is located in a plane to be inclined and inclined along the drum, when gripping the drum,
No excessive force acts on these forks, so that the drum can is reliably gripped without causing damage to the drum.

Further, when the drum can held by the fork is lifted by lifting the beam, the vertical axis to which the fork is connected is fixed with respect to the beam. The attitude of the drum can can be maintained without being affected by imbalance.

Further, even when the lifted drum can is landed, the vertical axis can rotate and tilt around the axis.For example, when stacking drums, the drums stacked on the floor or the like are slightly inclined in the horizontal plane. However, since the drums to be stacked along the inclined drum can rotate together with the vertical axis and tilt, the drum can can be reliably stacked.

When the drums K stacked on the floor or the like are not inclined, the drums can be accurately stacked at a predetermined position as a matter of course.

Furthermore, by moving a pair of forks along the body of the drum and enclosing the body, and raising the vertical axis, the body of the drum can is pinched and grasped, and tongs used for transporting ice and the like are provided. As described above, the weight of the drum can is made to act on the fork in the direction of approaching them to each other to obtain a gripping force, so that the drum can K can be gripped more safely than the conventional one in which the top plate and the bottom plate are sandwiched. The drum can can be reliably held and lifted only by raising the vertical axis.

[Brief description of the drawings]

1 to 5 show an embodiment of the hanging device of the present invention. FIG. 1 is a front view of a hanging device for a drum, FIG. 2 is a front view showing a main part of the hanging device, FIG. 3 is a side view of the same, FIG. 4 is a front view of a main part showing a moving body, FIG. 5 is a front view of a main part showing a third link, and FIG. 6 shows an example of a conventional hanging device for a drum can. It is a front view. K ... drum, 10 ... frame (beam), 15 ... vertical axis, 20 ... first link, 22 ... second link, 24 ... fork holder, 25 ... fork, 30 ... cylinder 31 ……
Horizontal axis, 35: Moving body, 37: Third link, 46: Hydraulic cylinder, 60: Fixed block, 61: Engagement hole, 62:
Engagement block.

──────────────────────────────────────────────────続 き Continuing from the front page (72) Kenichi Takahashi 1-19-10 Mohri, Koto-ku, Tokyo Ishikawa-jima Harima Heavy Industries, Ltd. Koto Office (72) Inventor Hiroo Kondo 4--11 Uenoge, Setagaya-ku, Tokyo No. 7 (56) References JP-A-2-127391 (JP, A) JP-A-61-12526 (JP, A) (58) Fields investigated (Int. Cl. ⁶ , DB name) B66C 1/00- 1/68

Claims (1)

(57) [Claims] 1. A vertical shaft is attached to a vertically movable beam, a base end of a pair of links is rotatably connected to the vertical shaft, and a cylindrical shape to be lifted at the distal end of the pair of links. Or, a circular arc-shaped fork having substantially the same radius of curvature as the columnar load is provided so as to be movable along the body of the load, and the vertical axis can be raised and lowered to the beam, and the vertical axis is relative to the beam. A sling that is rotatably and tiltably connected about an axis when it is raised by a predetermined amount.