JP2010149961A - Crane replacing apparatus and method for replacing crane using the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a crane replacing apparatus and a method for replacing a crane using the crane replacing apparatus, which enable replacement of an aging overhead crane with a new overhead crane in a short period of time. <P>SOLUTION: The crane replacing apparatus includes a movement frame 3 for moving a new or an installed crane between a first frame 1 and a second frame 2, the first frame 1 being disposed on the extension of a runway girder 20 on which the overhead crane runs and the second frame 2 being disposed in parallel to the first frame 1. The method for replacing the crane includes a step of assembling the new overhead crane 12 on the first frame 1 or the second frame 2, a step of moving the installed overhead crane 11 on the runway girder to either the first frame 1 or the second frame 2 which is vacant by the movement frame 3, and a step of moving the newly assembled crane 12 to the runway girder 20 by the movement frame 3. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a crane renewal device capable of renewing an aged overhead crane to a new overhead crane in a short period of time, and a crane renewal method using the same.

  Conventionally, steel mills have many overhead cranes such as ladle cranes with hooks for carrying casting pans, transport cranes for transporting raw materials, and charging cranes for inserting raw materials. in use. These overhead cranes are often used in harsh environments such as towing heavy ones in high-temperature work sites, and the need to upgrade to new overhead cranes has frequently arisen due to aging. Yes.

  As a method for updating such a crane, the existing overhead crane is disassembled into a plurality of blocks, this block is suspended on the ground with a lifting machine and disassembled finely, and a new overhead crane is assembled into a plurality of blocks on the ground. The method of assembling the final crane after setting this on the traveling rail with a lifting machine was common. In the case of this method, a construction period of about 2 to 3 months was required from the stop of the existing crane to the start of operation of the new crane.

On the other hand, recently, further improvement in production efficiency has been demanded, and shortening of the renewal period of the overhead crane has been required. Therefore, as shown in Patent Document 1, a technique has been proposed in which a ladle crane is formed as an integral structure, and a structure assembled on the ground is installed on a traveling rail by a lifting machine to shorten the work period.
However, in the invention described in Patent Document 1, the weight of the integrally assembled ladle crane is large, and the existing lifting machine can cope with it due to the capacity of the lifting machine that lifts it and the installation location of the lifting machine. There was a problem that could not. In addition, the installation of a new lifting machine has a problem in that it is difficult to apply in a current steel factory where there is not enough room on the site from the viewpoint of space.
JP 2008-1000083 A

  The present invention solves the above-described problems, and a crane updating apparatus that can efficiently and quickly update an aging overhead crane to a new overhead crane and a crane using the same. It was completed for the purpose of providing an update method.

The present invention, which has been made to solve the above problems, assembles a new overhead crane or installs a first frame for retracting an existing overhead crane on an extension line of a runway girder on which the overhead crane runs. A similar second frame is installed in parallel with the first frame, and a moving frame for moving the newly installed or existing overhead crane between the first frame and the second frame is provided. It is a crane update device.
In addition, the crane updating device is used to assemble a new overhead crane on the first or second frame, and the first or second of the existing overhead crane on the runway girder is in an empty state by the moving frame. A method of updating a crane, comprising a step of moving to a frame of 2 and a step of moving an assembled new overhead crane to a runway girder by a moving frame.

  A space is provided between the runway girder and the assembly work frame, and the movement frame can be configured to move in the space, and this is the invention according to claim 2.

  Moreover, the said moving frame can be installed so that height adjustment is possible by the raising / lowering apparatus, and this is set as the invention which concerns on Claim 3.

  Further, taper surfaces tapered downward are formed at both front and rear end portions of the moving frame, and the taper is formed at the runway girder to which the moving frame is connected, and at the connecting end portions of the first and second frames. A reverse tapered surface that engages the surface may be formed, and this is the invention according to claim 4.

  Furthermore, in the updating method of the crane updating device, the assembly of the new overhead crane and the trial operation of the assembled overhead crane can be performed on the first or second frame, and this is the invention according to claim 6. To do.

  Further, when moving, the moving frame is moved up and down so that the upper surface is higher than other adjacent frames, and when connected, the moving frame is moved down so that the upper surface is flush with the other adjacent frames. This is the invention according to claim 7.

  In the invention according to claim 1, a first frame and a second frame parallel to the first frame are provided, and a moving frame for moving a new or existing overhead crane between the first frame and the second frame is provided. Therefore, using this moving frame, the existing overhead crane can be moved to the first or second frame, and the new overhead crane can be moved onto the runway girder. It can be carried out.

  Further, in the invention according to claim 2, since a space is provided between the runway girder and the first frame, and the moving frame is configured to move in the space, it can be moved in the minimum necessary space. It is possible to install a construction frame.

  In the invention according to claim 3, since the moving frame can be adjusted in height by the lifting device, the moving frame is prevented from contacting the runway girder, the first frame, and the second frame when moving. It can be raised or lowered so as not to cause a step at the seam when connected.

  In the invention according to claim 4, since the taper surface of the moving frame and the runway girder to which the moving frame is connected and the continuous reverse taper surfaces of the first and second frames are in close contact with each other, there is no gap in the connecting portion. Can be prevented, and the movement of the crane can be performed smoothly by using a flat surface.

  Further, in the invention according to claim 5, by using the crane renewal device as described above, the dismantling of the existing overhead crane on the runway girder and the assembly of the new overhead crane on the first or second frame proceed simultaneously. In addition, the crane can be updated efficiently and in a short period of time by using the first or second frame as a shelter.

  In the invention according to claim 6, the trial operation of the overhead crane assembled on the first or second frame can be completed, and the inspection work at the time of starting up can be performed more quickly.

  Further, in the invention according to claim 7, since the height of the moving frame is controlled to move up and down in a predetermined pattern, the moving frame can be moved smoothly, and a gap is prevented from being generated at the time of connection. It is possible to renew the crane efficiently.

Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.
The drawings show an updating apparatus for an overhead crane in an iron factory, FIG. 1 is a plan view, and FIG. 2 is a front view. In the figure, 20 is a runway girder on which an overhead crane runs. No. 1 existing overhead crane 11 The case of updating to one new overhead crane 12 is shown.

On the extended line of the runway girder 20, a first frame 1 for assembling a new overhead crane or retracting an existing overhead crane is installed, and in parallel with the first frame 1, a new overhead crane is installed. A second frame 2 similar to the first frame 1 is installed for assembling or retracting an existing overhead crane.
Further, for moving the new or existing overhead crane between the first frame 1 and the second frame 2, or for moving the new or existing overhead crane between the runway girder 20 A frame 3 is provided.

  In addition, 30 (one-dot chain line) has shown the building of a factory, In this case, it cuts the wall of the building and connected the 2nd frame 2 provided in the adjacent land, and the moving frame 3 connected. Of course, these may be provided in the same building.

  A space is provided between the runway girder 20 and the first frame 1, and the moving frame 3 is configured to move in the space. This moving frame 3 is for moving a newly installed or existing overhead crane, and only needs to have a minimum width on which one overhead crane can be mounted. Should be provided.

In addition, as shown in FIG. 2, the moving frame 3 is set on a moving carrier 4 such as a dolly that can move freely in the front-rear and left-right directions via a lifting device 5 such as a hydraulic lift. The height can be adjusted freely. Accordingly, the height of the moving frame 3 is basically the same as the height of the runway girder 20, the first frame 1, and the second frame 2, but the first frame 1 can be used even if a deviation occurs. The second frame 2 and the runway girder 20 can be finely adjusted so that the height of the moving frame 3 is almost flush with the other, so that the crane can move smoothly without any step. Can be secured.
The almost flush height here includes the completely same height, as well as a crane between the moving frame 3, the first frame 1, the second frame 2, and the runway girder 20. It is a concept that includes the height when there is a difference that can be performed without any trouble.

Further, as shown in FIG. 7, tapered front surfaces 3a are formed at both front and rear ends of the moving frame 3 in the previous period, and the runway girder 20, the first and It has a structure in which reverse tapered surfaces 3b, 3b... That engage with the tapered surface 3a are also formed at the connecting end portions of the second frames 1 and 2.
In the case of a vertical cross-sectional structure, it is necessary to provide clearance between the moving frame 3 and the runway girder to ensure smooth movement. On the other hand, if the clearance is made as small as possible, it will come into contact and prevent smooth movement of the moving frame 3.
Therefore, in the present invention, the tapered taper surface 3a is formed on the moving frame side, and the runway girder 20 to which the moving frame 3 is connected, and the connection end portions of the first and second frames 1 and 2 are also described above. The structure in which reverse tapered surfaces 3b, 3b,... That engage with the tapered surface 3a are formed, so that the moving frame 3 is raised when moving between the first frame 1 and the second frame 2. It is easy to move with a sufficient clearance, and at the time of connection, the moving frame 3 is lowered to engage the taper surface 3a and the reverse taper surface 3b, and a substantially flat continuous surface is formed. The crane can be easily moved and moved.
That is, when the moving frame 3 is lowered by the elevating device 5, the tapered taper surface 3a of the moving frame 3 is guided by the reverse tapered surface 3b of the connecting end and can be smoothly installed at a predetermined position, thereby greatly reducing the work time. be able to. Further, even if the moving frame 3 is slightly displaced in the left-right (horizontal) direction, the displacement is automatically corrected so as to be eliminated by the tapered surface guide function.

Next, a procedure for replacing a newly installed / existing crane with the update device of the present invention will be described.
FIG. 1 shows, as an example, No. 1 on the runway girder 20. No. 1 existing overhead crane 11 assembled on the first frame. The case where it replaces and updates with 1 new overhead crane 12 is shown.

  In the crane renewal method of the present invention, the step of assembling the new overhead crane on the first or second frame, and the first or second of the existing overhead crane on the runway girder being vacant by the moving frame 3 And a process of moving the assembled new overhead crane to the runway girder by the moving frame.

Hereinafter, description will be made with reference to the perspective views of FIGS.
FIG. 3 shows that the first frame 1 is installed on the extension line of the runway girder 20 on which the existing overhead crane 11 travels, and the second frame 2 is installed in parallel with the first frame 1. A state is shown in which a moving frame 3 that can move between the first frame 1 and the second frame 2 is provided.
In the following description, the first frame 1 is for assembling the new overhead crane 12, while the second frame 2 is for retracting the existing overhead crane 11. However, on the contrary, the first frame may be used for retracting the existing overhead crane and the second frame may be used for assembling the new crane.
Of course, one crane or two or more cranes may be used, and the case of two cranes will be described later.

First, as shown in FIG. No. 1 new overhead crane 12 was assembled, and in parallel, No. 1 1 existing overhead crane 11 is removed from the runway girder 20.
The removal work of the existing overhead crane is performed by moving the existing overhead crane 11 from the runway girder 20 to the moving frame 3, moving the moving frame 3 from the first frame 1 to the second frame 2, and then moving This is performed by moving from the work frame 3 to the second frame 2 (see the broken line). In this way, no. One existing overhead crane 11 is retracted on the second frame 2.

  In the above removal operation, when the overhead crane is moved to the moving frame 3 or when it is moved from the moving frame 3 to the runway girder 20 or another frame, the moving frame 3 is lowered and is opposite to the tapered surface 3a. Since the taper surface 3b is brought into close contact with each other, it is possible to prevent a gap from being generated in the connecting portion, to form a flat continuous surface, and to easily move the crane. Further, when moving between the first frame 1 and the second frame 2, the moving frame 3 is lifted to ensure a sufficient clearance, so that it is safe without contact with other members. (See FIG. 7).

  Next, as shown in FIG. 5, No. 1 assembled on the first frame 1. One new overhead crane 12 is moved onto the runway girder 20 using the moving frame 3. This work is No. One new overhead crane 12 is simply moved sequentially from the first frame 1 to the runway girder 20 using the moving frame 3 as a connecting passage, and can be easily and smoothly performed.

Next, as shown in FIG. 1 The existing overhead crane 11 is dismantled, and the club 6 or the like, which is a part of the dismantled parts, is moved to a storage location or the like of the factory by another lifting machine. In the illustrated example, since the moving range of the other lifting machines is on the first frame 1, the existing overhead crane is moved from the second frame 2 evacuated by the moving frame 3 to the first frame 1. Are sequentially moved (see broken lines), and dismantling is performed on the first frame.
In this way, when the dismantling of the existing overhead crane 11 is finished, the crane update operation is finished.

  In addition to assembling the new overhead crane 12 on the first frame 1, a trial operation of the assembled overhead crane 12 can also be performed. Thereby, after the renewal work, the test and start-up work of various items of the newly installed overhead crane can be smoothly advanced, and the work period can be shortened.

  In the above description, the case where the new overhead crane 12 is assembled on the first frame 1 and the existing overhead crane 11 is retracted on the second frame 2 has been described. Of course, it is possible to assemble the new overhead crane 12 and retract the existing overhead crane 11 from the first frame 1. Of course, the number of cranes to be updated may be any number.

  In the case of the conventional method, it took about 4 months (1 month for dismantling + 3 months for installation) from the stoppage of the existing crane to the start of operation of the new crane. In the case of the renewal method of the present invention, it was confirmed that the renewal could be completed after a 4-day line suspension, and the construction period could be greatly shortened.

Next, No. 2 on the runway girder 20 is displayed. 1 and No. 2 existing overhead cranes 11a and 11b were assembled on the first frame. 1 and No. The case where the two new overhead cranes 12a and 12b are replaced and updated will be briefly described.
In FIG. 8, the case where the existing crane is removed when the alphabetic character written at the end of the arrow is uppercase, and the case where the new crane is carried when the alphabetic character is lowercase, is moved in alphabetical order. .

First, as shown in FIG. 1 and No. No. 2 two new overhead cranes 12a and 12b are assembled. 1 and No. The two existing overhead cranes 11 a and 11 b are removed from the runway girder 20.
The removal work of the existing overhead crane is performed by moving the existing overhead crane 11a from the runway girder 20 to the moving frame 3, moving the moving frame 3 from the first frame 1 to the second frame 2, and then moving This is done by moving from the work frame 3 to the second frame 2. Furthermore, the moving frame 3 returns to the first frame 1 again. Similarly, after moving the existing overhead crane 11b from the runway girder 20 to the moving frame 3, the moving frame 3 is moved from the first frame 1 to the first frame 1. This is performed by moving to the second frame 2 and then moving from the moving frame 3 to the second frame 2. In this way, no. 1 and No. Two existing overhead cranes 11 a and 11 b are retracted on the second frame 2.

  Next, as shown in FIG. 10, No. 1 assembled on the first frame 1. 1 and No. Two new overhead cranes 12 a and 12 b are moved onto the runway girder 20 using the moving frame 3. This work is No. 1 and No. The two new overhead cranes 12a and 12b are simply moved sequentially from the first frame 1 to the runway girder 20 using the moving frame 3 as a connecting passage, and can be performed easily and smoothly.

Next, as shown in FIG. 1 and No. The two existing overhead cranes 11a and 11b are disassembled, and the club 6 or the like, which is a part of the dismantled parts, is moved to a storage location or the like of the factory by another lifting machine. In the illustrated example, since the moving range of the other lifting machines is on the first frame 1, the existing overhead crane is moved from the second frame 2 evacuated by the moving frame 3 to the first frame 1. Are sequentially moved and dismantled on the first frame.
In this way, when the dismantling of the two existing overhead cranes 11a and 11b is finished, the crane updating operation is finished.

In the above description, the case where the new overhead cranes 12a and 12b are assembled on the first frame 1 and the existing overhead cranes 11a and 11b are retracted on the second frame 2 is described. Of course, the new overhead cranes 12a and 12b may be assembled on the second frame 2, and the existing overhead cranes 11a and 11b may be retracted on the first frame 1.
Of course, even if the number of cranes to be updated is three or more, the updating operation can be performed by the same procedure as described above.

It is a top view which shows embodiment of this invention. It is a front view which shows embodiment of this invention. It is a perspective view which shows an update process. It is a perspective view which shows an update process. It is a perspective view which shows an update process. It is a perspective view which shows an update process. It is a front view which shows the frame for a movement. It is a top view which shows another update process. It is explanatory drawing which shows another update process. It is explanatory drawing which shows another update process. It is explanatory drawing which shows another update process.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 1st frame 2 2nd frame 3 moving frame 3a taper surface 3b reverse taper surface 4 carrier for movement 5 lifting device 6 club 11 existing overhead crane 12 newly installed overhead crane
11a No. 1 Existing overhead crane
11b No. 2 existing overhead cranes
12a No. 1 new overhead crane
12b No. 2 new overhead cranes

Claims (7)

  On the extension line of the runway girder on which the overhead crane runs, a new overhead crane is assembled or a first frame for retracting the existing overhead crane is installed, and a second frame similar to the first frame is installed in parallel. And a moving frame for moving the newly installed or existing overhead crane between the first frame and the second frame.   The crane updating apparatus according to claim 1, wherein a space portion is provided between the runway girder and the first frame, and the moving frame is configured to move within the space portion.   The crane renewal device according to claim 1 or 2, wherein the moving frame is adjustable in height by an elevating device.   Tapered surfaces tapering downward are formed at both front and rear ends of the moving frame. The runway girder to which the moving frame is connected, and the connecting ends of the first and second frames are connected to the tapered surface. The crane renewal device according to claim 3 in which a reverse taper surface which meets is formed.   A crane updating method using the crane updating device according to any one of claims 1 to 4, wherein a step of assembling a new overhead crane on the first or second frame, and an existing overhead crane on a runway girder A method of updating a crane, comprising: a step of moving the first overhead crane to a first or second frame that is in an empty state by a moving frame; and a step of moving the assembled new overhead crane to a runway girder by the moving frame.   The crane renewal method according to claim 5, wherein the assembly of the new overhead crane and the trial operation of the assembled overhead crane are performed on the first or second frame. When moving, the moving frame is raised so that the upper surface is higher than the other adjacent frames, and when connected, the moving frame is lowered so that the upper surface is almost flush with the other adjacent frames. The crane updating method according to claim 5 or 6 to be performed.

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