JP2595641B2 - Bridge crane - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bridge-type crane capable of changing a traveling path and finely adjusting a position of a hanging tool on which a work is hung. .

[Prior Art] Generally, a bridge-type crane is provided with a crane girder at the upper end of a pair of tall legs that can run in the same direction across a work place. A trolley having a wire to which the wire is attached is provided so as to be able to travel in the longitudinal direction of the crane girder, and the legs are adapted to travel along a rail laid on the floor of the work place.

By the way, the bridge-type crane as described above is also used in a low-level radioactive waste burial site. A number of parallel rails are laid on the floor of the low-level radioactive waste repository, and a number of concrete sections are arranged vertically and horizontally between each rail. In such a burial site, a bridge-type crane is used to store drums filled with low-level radioactive waste in each section.

[Problems to be Solved by the Invention] However, in a low-level radioactive waste burial site as described above, if the drums are stored in all the sections between certain rails, the bridge crane must be moved to the next traveling path. No.

Conventionally, since it is only necessary to move the bridge crane once every few months, it has been necessary to disassemble the bridge crane and assemble it on the next traveling path each time. However, once every few months,
Dismantling and assembling a bridge crane requires a lot of manpower and equipment, and this has led to a problem that the cost of burying low-level radioactive waste is relatively high.

In the bridge-type crane described above, the hanging tool attached to the drum can is hung due to the swing of the hanging tool attached to the lower end of the wire or the shift of the trolley stop position from the position of the drum can. There was also a problem that a worker had to intervene in the work.

[Object of the Invention] The present invention has been made in view of the above circumstances, and it is possible to easily change a traveling path, and also to perform a fine adjustment of a position of a hanging tool. It is intended to provide.

[Means for Solving the Problems] A bridge-type crane according to the present invention has a leg that can travel along a track, a pillar extending vertically, and a lower end of the pillar in a direction along the track. A pair of bogies provided separately from each other and rotatable about a rotation center line pointing in the up-down direction, and a pair of bogies provided on the column, the lower end of which presses the track or floor to form the column and the column. A trolley, a slide movable in a direction substantially perpendicular to the traveling direction of the trolley, a table provided on the slide and rotatable around a vertical line, and supported by the table. And a rod-shaped body having a lower end movable in the vertical direction and a hanger attached to the lower end.

[Operation] In the bridge-type crane having the above configuration, each of the bogie portions can be rotated by 90 ° by lifting the pillar portion and the bogie portion, thereby lifting the bogie portion from the track. Therefore, if a rail for moving to the next traveling path is laid on the floor of the burial site, the bridge crane can be moved to the next traveling path and used by placing the bogie on the rail. In addition, since the hanging tool is attached to the lower end of the rod that can be moved in the vertical direction, the hanging tool does not swing, and the slide is moved or the table is rotated. It becomes possible to finely adjust the position and orientation of the tool.

An embodiment of the present invention will be described below with reference to FIGS. 1 to 7. 1 to 6 are views showing a bridge-type crane A of an embodiment, and FIG. 7 is a plan view showing a low-level radioactive waste burial site where the bridge-type crane A is used. Here, prior to the description of the embodiment, a schematic configuration of a burial site will be described.

In FIG. 7, reference numeral 1 denotes a floor, on which a plurality of rails (hereinafter referred to as horizontal rails) 2... Between 2 and 2, buried equipment groups 3a to 3h are provided, respectively. Here, the burial site shown in FIG. 7 is provided on a slope, and the height of the floor of the burial facilities 3a to 3h is made to gradually decrease from the upper one to the lower one in the figure. ing. Each of the buried equipment groups 3a is divided into five sections, and each of the five divided sections is provided with a concrete section 4 divided into 16 rooms. In addition, between the burial facilities 3b, 3c, 3d, 3e, 3f, 3g, passages 5 through which a truck for carrying drums to the burial site pass are provided. At the right end of the burial site, two rails (hereinafter referred to as vertical rails) 6.6 orthogonal to the horizontal rails 2 are laid. The vertical rail 6 is provided to be inclined in accordance with the inclination of the ground of the burial site.

Next, the bridge type crane A of the embodiment has two horizontal rails 2.
・ It is mounted on 2 and can run in the left-right direction.
As shown in FIG. 3, the bridge crane A has a pair of legs 7.
A crane girder 8 whose longitudinal direction is directed to a direction substantially orthogonal to the horizontal rail 2 is attached to an upper end of the crane 7. The crane girder 8 has a rectangular frame shape in plan view, and a trolley 9 that can travel in the longitudinal direction of the crane girder 8 is supported on two rails 10 on the upper surface thereof.

The trolley 9 will be described in detail.
Is a base. The base 11 has four wheels on the rail 10.
12 are movable in a direction perpendicular to the plane of the drawing. Also, two rails 13, 13 whose longitudinal direction is directed to the left and right in the figure are attached to the upper surface of the base 11, and a slide 14 is supported on the rails 13, 13. The slide 14 is made movable by four wheels 15. A table 18 is mounted on the upper surface of the slide 14 so as to be rotatable around a vertical line. This table 16
Is equipped with two winding rollers 17,17. Wires 18 are wound around the hoisting roller 17, and hanging members 19 are attached to the lower ends of the wires 18.

Eight pairs of claws 20 that can be opened and closed generally are attached to the hanger 19 so as to lift eight drums 21 at a time. An extendable mast (rod-like body) 22 is connected to the upper end of the hanging tool 19. Mast 22
Is supported by the table 16. The mast 22 is formed by sequentially fitting cylindrical bodies having different sizes. Each of the cylindrical bodies is capable of relative movement in the vertical direction, but is prevented from moving in the horizontal direction. For this reason, when the wire 18 is wound up and down, the hanger 19 moves only in the vertical direction and does not swing in the horizontal direction. Reference numeral 23 in FIG. 2 denotes an operation room.

Next, the configuration of the leg 7 will be described in detail.
In the figure, reference numeral 30 denotes a pillar. The pillar 30 has a substantially U-shape whose upper part is open, and a bogie 31 that is separated from each other in the left-right direction is attached to a lower end surface thereof.

FIG. 4 shows the details of the bogie unit 31, and reference numeral 32 in the figure denotes a gantry. The gantry 32 is rotatably mounted with two wheels 33, 33 spaced apart from each other in the left-right direction. These wheels 33 are mounted on a motor 3 mounted on the upper surface of the carriage 32.
4, rotatable by a speed reducer 35 and a gear 36. Reference numeral 37 denotes a brake. Further, a stopper 38 is attached to the gantry 32. Stopper 38
The arm 38a has an intermediate portion rotatably supported, and a locking member 38b rotatably connected to the tip of the arm 38a.
It consists of:

Further, a tongue piece 39 projecting upward is formed at the upper end of the gantry 32. The tongue 39 has a cradle 40 with a pin 41
-It is rotatably connected via 41. On the other hand, the pillar
A bracket 42 is attached to 30. And
The pillar 30 is supported with its bracket 42 placed on the upper surface of the receiving table 40, and the carriage 31 is connected to the bracket 42 so as to be rotatable around a vertical line.

That is, in FIGS. 5 and 6, reference numeral 50 denotes a hydraulic jack (push-up mechanism). The hydraulic jack 50 has a vertically movable piston 51 at its lower end, and the piston 51 is expanded and contracted by hydraulic oil fed into the inside thereof. A pusher 53 is attached to the lower end of the piston 51. On the lower surface of the pusher 53, a concave portion 53a that engages with the rail is formed. At the lower end of the hydraulic jack 51, a ring-shaped thrust bearing 54 is attached.

On the other hand, a cylindrical body 55 penetrated by the hydraulic jack 50 is fixed to the cradle 40 of the bogie unit 31. A slight gap T is provided between the lower end surface of the cylindrical body 55 and the thrust bearing 54. With this configuration, the bogie unit 31 is vertically movable relative to the pillar 30 by the above-described gap T, and is relatively rotatable. Reference numeral 56 in the figure is a metal for preventing friction between the cylindrical body 55 and the hydraulic jack 50.

Next, the drum can 21 is moved by the bridge-type crane A having the above configuration.
Are stored in the sections 4.

First, the drums 21 are carried into the passage 5 of the burial site by the transport vehicle 60 (see FIG. 3). Also, bridge crane A
Of the trolley 9 has been moved above the transport vehicle 60. next,
The hoisting rollers 19 are rotated to lower the hanging member 19 to a predetermined position. In this case, since the hanger 19 is supported by the mast 22, it falls straight without swinging. Next, the table 16 is rotated and the slide 14 is moved to finely adjust the position of the hanger 19 in accordance with the inclination or displacement of the posture of the drums 18.
... is gripped. Then, the gripped drum cans 21 are lifted and moved in the horizontal direction to be housed in the predetermined section 4, and the cover 61 is closed when the section 4 is full. This lid 61 is also transported by the bridge type crane A.

Next, for example, when the drums 21 are stored in all the sections 4 of the buried facility group 3a, the bridge crane A is moved to the buried facility group 3b.
The procedure for moving to is described.

First, the bridge crane A is moved to the right end in FIG. At this time, the bridge-type crane A has wheels 33 of the bogie unit 31.
Are located at the intersections of the horizontal rail 2 and the vertical rail 6, respectively. Next, hydraulic oil is supplied to the hydraulic jack 50 to bring the piston 51 into an extended state. Then, the pusher 53 presses the horizontal rail 2, and first, only the pillar 30 is lifted while the carriage 31 is left on the horizontal rail 2. Thus, the bracket 42 of the pillar 30 and the cradle 40 of the carriage 31
Then, the upper surface of the thrust bearing 54 and the lower surface of the cylindrical body 55 come into contact with each other, and the bogie unit 31 is also lifted. As a result, the bogie unit 31 is supported by the thrust bearing 54, and is rotatable about its axis. When the wheel 33 and the horizontal rail 2 are separated from each other and their engagement is released, the bogie unit 31 is manually turned by 90 °.
The piston 51 is rotated, and the piston 51 is reduced in this state. Then, the bogie unit 31 descends and the wheels 33 are put on the vertical rails 6. Next, the bridge type crane A is moved to the buried facility group 3b, and the bogie unit 31 is rotated 90 ° by the same procedure as described above.
When rotated, the movement of the bridge crane A is completed.

In the bridge-type crane A having the above-described structure, the hanging member 19 is attached to the lower end of the mast 22 which can be moved in the vertical direction.
, Or by rotating the table 16, fine adjustment of the position and orientation of the hanging member 19 can be performed. In addition, since the hanging members 19 do not swing, the operation of storing the drums 21 in the section 4 becomes easy, and therefore, the efficiency of the load storing operation can be greatly improved.

In the bridge-type crane A, the bogie section is lifted from the horizontal rail 2 by lifting the pillar section 30 and the bogie section 31, whereby the bogie section 31 is rotatable. By simply laying the vertical rails 6 on one, it is possible to easily move to the next buried facility group 3b. Therefore, the dismantling and assembling work of the bridge crane A, which has been conventionally performed, is not required at all, and the burial cost of low-level radioactive waste can be significantly reduced. further,
By lifting both the pillar section 30 and the bogie section 31 with the hydraulic jack 50, the bogie section 31 is supported by the light bearing 54, so that the bogie section 31 can be easily rotated manually, and therefore, The structure can be simplified.

In the upper embodiment, the horizontal rail 2 is pushed by the hydraulic jack 50. However, the floor 1 may be pushed. Further, the so-called lifting mechanism is not limited to the hydraulic jack 50 as described above, and various types such as a screw type may be applied. Further, in the above embodiment, the bogie unit
Although the two wheels 33 are provided on 31, the same effect can of course be obtained with one wheel.

In addition, for a so-called rod-shaped body that supports the hanging member 19,
The configuration is not limited to the mast 22 as described above, and any configuration can be used as long as it can prevent the swinging and rotation of the hanging member 19.

[Effect of the Invention] As described above, in the bridge-type crane of the present invention, a leg that can run along the track has a vertically extending pillar, and a lower end of the pillar has a direction along the track. And a pair of bogies, which are provided separately from each other and are rotatable about a rotation center line pointing in the vertical direction, respectively, and provided on the pillar, and the lower end pushes the track or the floor, and the pillar and the bogie. A trolley provided with a push-up mechanism for lifting the part, the slide being movable in a direction substantially perpendicular to the traveling direction of the trolley, a table provided on the slide, and rotatable around a vertical line, and supported by the table. The lower end is made to be movable in the vertical direction, and the lower end is provided with a rod-shaped body to which a hanger is attached. Just set up a track The bridge-type crane can be easily moved, so that there is no need to disassemble and assemble the bridge-type crane, which is conventionally performed, and the cost of burying low-level radioactive waste can be greatly reduced. In addition, since the hanging tool is attached to the lower end of the rod that can be moved in the vertical direction, the hanging tool does not swing and the slide is moved or the table is rotated to suspend the hanging tool. It becomes possible to finely adjust the position and orientation of the tool. In addition, the operation of storing the load in a predetermined place while the hanging tool swings becomes easy, and excellent effects such as the efficiency of the load storing operation can be greatly improved can be obtained.

[Brief description of the drawings]

1 to 7 show an embodiment of the present invention. FIG. 1 is a side view showing a bridge crane, FIG. 2 is a plan view showing a bridge crane, and FIG. FIG. 2 is a view in the direction of arrow III, FIG. 4 is a side view showing details of the legs of the bridge crane,
FIG. 5 is a side sectional view showing the inside of the bogie unit, FIG. 6 is a sectional view taken along the line VI-VI of FIG. 5, and FIG. 7 is a plan view showing a low-level radioactive waste burial site. 1 ... floor, 2 ... horizontal rail (track), 7 ... leg, 8 ...
... Crane girder, 9 ... Trolley, 14 ... Slide, 16 ...
Table, 19 ... hanging equipment, 22 ... mast (rod), 30 ...
... Pillar part, 31 ... Bogie part, 50 ... Hydraulic jack (push-up mechanism).

Claims (1)

(57) [Claims] 1. A crane girder having a longitudinal direction substantially perpendicular to the track is erected on the upper end of a pair of legs capable of traveling along a track, and a trolley capable of traveling in the longitudinal direction on the crane girder. In the bridge-type crane provided with the above, the leg portion is provided with a pillar portion extending in the vertical direction and a lower end portion of the pillar portion so as to be separated from each other in a direction along the track, and the rotation center pointing in the vertical direction is provided. A pair of bogie portions each made rotatable about a line, and a push-up mechanism provided on the pillar portion, wherein a lower end portion pushes the track or floor to lift the pillar portion and the bogie portion, The trolley is a slide that can be moved in a direction substantially perpendicular to the traveling direction of the trolley, a table that is provided on this slide, and that can be rotated around a vertical line, and supported by this table, the lower end can move vertically Nanasa Bridge crane, characterized by comprising a rod-shaped hanger is attached bodies Rutotomoni the lower end.