JP6137103B2 - Overhead crane traveling girder reinforcement method and suspension jig used in this method - Google Patents

Description

  The present invention relates to a method for reinforcing a traveling girder of an overhead crane and a hanging jig used in this method.

  The overhead crane includes a pair of traveling girders that extend in parallel with each other near the ceiling of the factory building, a crane main girder that runs on the pair of traveling girders, and a club that traverses the crane main girder. A hoisting device mounted on the club, and a hook provided at the tip of the hoisting device wire is engaged with the suspended load, and the crane main beam is run, the club is traversed, and the hoisting device is driven. It is a device that lifts and holds a load and moves it up, down, front, back, left, and right in a factory building.

When increasing the lifting capacity of an overhead crane or reducing the effect of fatigue of a traveling girder due to the action of repeated loads, a long steel reinforcement member is fixed in the longitudinal direction of the lower part of the traveling girder. Reinforcement of the running girder
When reinforcing this traveling girder, use a heavy equipment such as a tow truck or crane truck placed in the factory building to place a reinforcing member under the traveling girder, or lifting supported by the wire of the tower crane There is a method (for example, refer to Patent Document 1) in which a reinforcing member is arranged at the lower part of a traveling girder using a device.

In the method of reinforcing a traveling girder using heavy machinery in a factory building, a reinforcing member is held on the boom of the heavy machinery, and the reinforcing member is lifted vertically toward the lower portion of the traveling girder by turning the boom. However, when there is factory equipment or the like below the traveling girder, the equipment becomes an interference and it becomes impossible to use heavy machinery.
Further, in the method of reinforcing the traveling girder using the lifting device supported by the tower crane, since the lifting device holding the reinforcing member moves in the vertical direction, the reinforcing member cannot be positioned below the traveling girder. . Therefore, a horizontal movement device is required for moving the reinforcing member, which is positioned near the lower part of the traveling beam by the vertical movement of the lifting device, in the horizontal direction.
Furthermore, the method of reinforcing a running girder using heavy machinery or a tower crane is problematic in terms of economy and shortening the construction period.

JP 2007-113219 A

  The present invention has been made paying attention to the unsolved problems of the above-described conventional example, and even if factory equipment exists below the traveling beam to be reinforced, a reinforcing member is disposed below the traveling beam. An object of the present invention is to provide a construction method for reinforcing a traveling girder of an overhead crane capable of reinforcing the traveling girder economically and shortening the construction period, and a hanging jig used in this construction method.

  In order to achieve the above object, a traveling girder reinforcing method for an overhead crane according to an aspect of the present invention includes a pair of traveling girders extending in parallel with each other near the ceiling of a building, and a pair of traveling girders. A construction method for reinforcing the traveling girder of an overhead crane comprising a crane main girder that is installed and travels, a club that traverses the crane main girder, and a hoisting device mounted on the club. A hook provided on the tip of the wire of the hoisting device is engaged with a hanging jig placed on the ground directly below the crane, and the one end of the hanging jig is different from the position where the hook is engaged. A long reinforcing member that reinforces the traveling girder is detachably fixed, and the hoisting operation of the hoisting device is performed, so that the suspension jig holding the reinforcing member horizontally is reinforced to the height of the traveling girder to be reinforced. Lift up and above A position along the lower part of the traveling girder where the reinforcing member should be reinforced by moving the suspension jig in the horizontal direction starting from one end to which the reinforcing member is fixed as the lane main girder travels and the club traverses The reinforcing member moved to the position along the lower part of the traveling girder is temporarily fixed by a temporary fixing member, and then the reinforcing member is fixed to the suspension jig, and the reinforcing member is moved by welding. Fix to the bottom of the girder.

  Here, the hoisting device is a first hoisting device and a second hoisting device mounted on the club, and the suspension jig is located on the other side opposite to the one end portion to which the reinforcing member is fixed. The weight of the end portion is increased, the first hook of the first hoisting device is engaged between the one end portion and the other end portion, and the suspension treatment is centered on the portion engaged with the first hook. When the tool is inclined toward the other end, the hoisting / unwinding operation of the second hoisting device with the second hook engaged with the other end is performed. The lifting posture may be adjusted.

  Moreover, the hanging jig used in the traveling girder reinforcing method for an overhead crane according to one aspect of the present invention is provided on a rectangular frame in plan view and on one side in the longitudinal direction of the frame, and the reinforcing member A detachable fixing portion, a second hook engaging portion provided on the other side in the longitudinal direction of the frame body and engaged with the second hook, and the other side in the longitudinal direction of the frame body A balance weight fixed to the side and making the other side heavier than the one side, and the first hook is provided on the frame body between the balance weight and the fixing portion. A first hook engaging portion.

  According to the method for reinforcing a traveling girder of an overhead crane according to the present invention, even if a tall interfering object exists below the traveling girder to be reinforced, the hanging jig to which the reinforcing member is fixed is moved vertically By moving the reinforcing member in the direction, the reinforcing member can be easily transported to the lower part of the traveling beam while avoiding the interference below the traveling beam. The lifting and lowering operation of the lifting jig is performed by an overhead crane hoisting device having a traveling girder to be reinforced, which eliminates the need for heavy machinery and tower cranes as in the conventional reinforcing method, and is economical and feasible. The running girder can be reinforced by shortening.

  Moreover, according to the hanging jig used for the traveling girder reinforcement method of the overhead crane according to the present invention, the reinforcing member fixed by the hoisting / rewinding operation of the first hoisting device and the second hoisting device of the overhead crane. Since the horizontal posture can be finely adjusted, the reinforcing member can be arranged accurately and easily at the lower part of the traveling beam.

It is a figure which shows the structure of the overhead crane which concerns on this invention, (a) is a front view, (b) is a top view. It is a figure which shows the hanging jig | tool which fixed the reinforcement member which concerns on 1st Embodiment of this invention, and is mounted on the ground. It is a fixing | fixed part which fixes the reinforcement member provided in the hanging jig which concerns on 1st Embodiment of this invention. It is a figure which shows the state which fixed the reinforcement member to the lower part of the traveling beam which should be reinforced according to 1st Embodiment of this invention. It is a figure which shows fixing a reinforcement member to the hanging jig | tool mounted on the ground in the traveling girder reinforcement construction method of the overhead crane which concerns on 1st Embodiment of this invention. It is a figure which shows the state which has lifted the hanging jig which fixed the reinforcement member which concerns on 1st Embodiment of this invention, and was made into the horizontal attitude | position. It is a figure which shows the state which has moved the hanging jig | tool which fixed the reinforcement member which concerns on 1st Embodiment of this invention, and was made into the horizontal posture in the horizontal direction. It is a figure which shows the state which has finely adjusted the horizontal attitude | position of the reinforcement member by adjusting the raising attitude | position of the hanging jig which concerns on 1st Embodiment of this invention. It is a figure which shows the shape of the hanging jig which concerns on 2nd Embodiment of this invention.

DESCRIPTION OF EMBODIMENTS Hereinafter, modes for carrying out the present invention (hereinafter referred to as embodiments) will be described in detail with reference to the drawings.
A traveling girder reinforcing method (hereinafter referred to as a traveling girder reinforcing method) of the overhead crane according to the first embodiment of the present invention will be described with reference to FIGS. 1 to 8.
1 (a) and 1 (b) show the structure of an overhead crane, which is a steelmaking overhead crane used to transport a ladle (ladder: not shown) in a steelmaking factory (hereinafter simply referred to as a ceiling). Called a crane).

  The overhead cranes were installed on a pair of traveling girders 1, 1 and a pair of traveling girders 1, 1 extending in parallel with each other along the walls on both sides in the vicinity of the ceiling of the steel mill factory building. On the traveling rails 2, 2, on the traveling main rails 2, 2, the crane main girder 4, which is installed between the traveling girders 1, 1 and moves in the traveling direction with the wheels 3 on the traveling rails 2, 2, Is mounted on the club 5 and mounted on the club 5 together with the main hoisting device 7 and the two main hoisting devices 7 for raising and lowering the ladle engaged with the main hook 6. And an auxiliary hoisting device 9 for tilting the ladle by engaging the auxiliary hook 8 with the bottom of the ladle.

The traveling girder 1 includes an upper flange 1a, a web 1b, and a lower flange 1c.
The crane main girder 4 includes two box girders 10 and 10 having a box-shaped cross section extending in parallel in the transverse direction, and saddles 11 and 11 connecting the ends of the two box girders 10 and 10. It has a well-shaped structure, and traverse rails 12 and 12 are installed on the respective box girders 10 and 10. The club 5 is moved in the transverse direction by the wheels 13 and 13 on the transverse rails 12 and 12.

2 and 3 show the hanging jig 15 used in the traveling beam reinforcing method of the first embodiment and the reinforcing member 17 fixed to the hanging jig 15.
The hanging jig 15 is placed on a table 18 installed on the ground in a steel mill factory, and a frame body 19 formed by framing H-shaped steel in a rectangular shape in plan view, and the length of the frame body 19 3 that fixes the reinforcing member 17 to one side in the direction, the auxiliary hook engaging wire 21 provided on the other side in the longitudinal direction of the frame body 19, and the longitudinal direction of the frame body 19 A balance weight 22 fixed to the other side of the main body, and a main hook engaging portion 23 provided between the balance weight 22 and the fixing portion 20.

A bracing portion 24 formed by intersecting a plurality of metal rods is provided inside the frame body 19, and the rigidity of the frame body 19 is enhanced by providing the bracing portion 24. Further, the main hook engaging portion 23 is an H-shaped steel extending in the short direction inside the frame body 19.
As shown in FIG. 2, the reinforcing member 17 includes a long T-shaped steel provided with a reinforcing web 17a and a reinforcing flange 17b, and a predetermined interval in the longitudinal direction between the side surface of the reinforcing web 17a and the upper surface of the reinforcing flange 17b. It consists of a plurality of reinforcing ribs 17c which are opened and fixed.

  As shown in FIG. 3, the fixing portion 20 is configured such that both edges of the reinforcing flange 17 b in the width direction of the reinforcing member 17 in contact with the upper surface of one side in the longitudinal direction of the frame body 19 are screwed in by fixing bolts 25. And a connecting plate 29 connecting a fixing plate 27 rising from the reinforcing rib 17c of the reinforcing member 17 and the frame body 19 via a connecting bolt 28. As shown in FIG. 2, the fixing portion 20 is fixed in a state where the reinforcing member 17 is projected along the one side in the longitudinal direction of the frame body 19 and outward of the frame body 19.

In the suspension jig 15 having the above configuration, the auxiliary hook 8 of the auxiliary hoisting device 9 is engaged with the auxiliary hook engaging wire 21, and the main hooks 6 of the two main hoisting devices 7 are engaged with the main hook engaging portion 23. To do.
And when the lifting jig 15 is lifted by the winding operation of the two main winding devices 7, the weight on the side where the balance weight 22 is fixed is increased with respect to the fixing portion 20 side where the reinforcing member 17 is fixed. The lifting jig 15 is inclined to the side where the balance weight 22 is fixed, but the balance weight 22 is fixed via the auxiliary hook 8 and the auxiliary hook engaging wire 21 by performing the winding operation of the auxiliary winding device 9. The side is raised so that the hanging jig 15 is in a horizontal posture, and the reinforcing member 17 fixed to the hanging jig 15 is held horizontally.

FIG. 4 shows a reinforcing structure of the traveling beam 1, and a reinforcing web 17 a and a plurality of reinforcing ribs 17 c of the reinforcing member 17 are fixed to the lower part of the lower flange 1 c of the traveling beam 1 by welding. Note that reference numeral 30 in FIG. 4 denotes a support column that supports the traveling beam 1.
Next, a method of reinforcing the traveling girder 1 of the overhead crane using the lifting jig 15 (traveling girder reinforcing method of the first embodiment) will be described with reference to FIGS. It is assumed that a tall facility H in the interior of the building is present below the traveling beam 1 that performs the reinforcement work (see FIGS. 6 to 8).

  First, as shown in FIG. 5, a plurality of stands 18 are arranged on the ground directly below the overhead crane, and the hanging jig 15 is placed on these stands 18. And the reinforcement member 17 is fixed to the hanging jig | tool 15 using the fixing | fixed part 20 shown in FIG. As shown in FIG. 2, the reinforcing member 17 fixed to the hanging jig 15 using the fixing portion 20 extends along the side in the longitudinal direction of the frame body 19 constituting the hanging jig 15. It is fixed in a protruding state.

Next, as shown in FIG. 2, the auxiliary hook 8 of the auxiliary hoisting device 9 is engaged with the auxiliary hook engaging wire 21 of the hanging jig 15, and the two main hoisting devices 7 are connected to the main hook engaging portion 23. The main hook 6 is engaged.
Next, the hoisting jig 15 is lifted by the hoisting operation of the two main hoisting devices 7, and the hoisting jig 15 tries to tilt toward the side on which the balance weight 22 is fixed. As a result, the side to which the balance weight 22 is fixed is raised via the auxiliary hook 8 and the auxiliary hook engaging wire 21 to bring the hanging jig 15 into a horizontal posture, and the reinforcing member 17 fixed to the hanging jig 15 is attached. Keep it horizontally.

Then, as shown in FIG. 6, a traveling beam that reinforces the lifting jig 15 holding the reinforcing member 17 horizontally at a position higher than the equipment H by the winding operation of the two main winding devices 7 and the auxiliary winding device 9. It is raised to a position that is approximately the same height as 1.
Next, as shown in FIG. 7, the crane main girder 4 travels a predetermined distance and the club 5 traverses a predetermined distance to the lower position of the traveling girder 1 that reinforces the hanging jig 15 with the reinforcing member 17 at the head. To do.

  Next, as shown in FIG. 8, the reinforcing member 17 fixed to the hanging jig 15 is brought into contact with the lower flange 1 c of the traveling girder 1 by the winding operation of the two main winding devices 7. At that time, the lifting / rewinding operation of the auxiliary winding device 9 is performed to adjust the lifting posture of the lifting jig 15, and the reinforcing web 17 a of the reinforcing member 17 and all the reinforcing flanges 17 b are connected to the lower flange 1 c of the traveling beam 1. The horizontal posture of the reinforcing member 17 can be finely adjusted so as to contact the entire area in the longitudinal direction.

Next, the reinforcing member 17 disposed at the lower portion of the traveling beam 1 is temporarily fixed to the traveling beam 1 by a temporary fixing member (not shown). Thereafter, the fixing bolt 17 and the connecting bolt 28 of the fixing portion 20 are loosened and removed to release the fixing member 17 from the hanging jig 15.
Next, the reinforcing web 17a and the reinforcing rib 17c of the reinforcing member 17 and the lower flange 1c of the traveling beam 1 are fixed by welding.

Thereby, as shown in FIG. 4, the reinforcing member 17 is fixed to the lower part of the lower flange 1 c of the traveling girder 1, and the reinforcing method for the traveling girder 1 is completed.
The first hoisting device according to the present invention corresponds to the main hoisting device 7, the second hoisting device according to the present invention corresponds to the auxiliary hoisting device 9, and the second hook engaging portion according to the present invention is supplemented. It corresponds to the hook engaging wire 21.

Next, the effect of the traveling girder reinforcement method of the first embodiment described above will be described.
The traveling girder reinforcement construction method of the first embodiment uses the suspension jig 15 to which the reinforcing member 17 is fixed even if there are interference objects such as tall facilities H in the building under the traveling girder 1 to be reinforced. By moving in the vertical direction and moving in the horizontal direction, the reinforcing member 17 can be easily transported to the lower part of the traveling beam 1 while avoiding the interference below the traveling beam 1.

Moreover, since the lifting / lowering operation of the lifting jig 15 is performed by the main hoisting device 7 and the auxiliary hoisting device 9 of the overhead crane provided with the traveling girder 1 to be reinforced, heavy machinery and tower cranes such as a conventional reinforcing method can be used. It becomes unnecessary. Therefore, the traveling girder 1 can be reinforced economically and with a shortened construction period.
Further, by performing the hoisting / rewinding operation of the auxiliary hoisting device 9 of the overhead crane, the horizontal posture of the reinforcing member 17 disposed at the lower part of the traveling beam 1 can be finely adjusted. The operation | work which arrange | positions the member 17 can be performed easily.

  Furthermore, the overhead crane of the first embodiment is an overhead crane for steel making that includes two main hoisting devices 7 that raise and lower a ladle (ladder) and one auxiliary hoisting device 9 that tilts the ladle. Since the lifting jig 15 is lifted by using the existing main hoisting device 7 and the auxiliary hoisting device 9 and the reinforcing member 17 is disposed at the lower part of the traveling girder 1, the economic efficiency and shortening of the construction period of the traveling girder reinforcing method are further achieved. Can be achieved.

  The suspension jig 15 used in the traveling girder reinforcement method of the first embodiment is provided with a fixing portion 20 that fixes the reinforcing member 17 on one side in the longitudinal direction of the frame body 19. The auxiliary hook engaging wire 21 is provided on the other side in the direction, the balance weight 22 is provided on the other side in the longitudinal direction of the frame body 19, and the main hook engaging portion 23 is provided between the balance weight 22 and the fixing portion 20. The auxiliary hook 8 of the auxiliary hoisting device 9 is engaged with the auxiliary hook engaging wire 21, and the main hooks 6 of the two main hoisting devices 7 are engaged with the main hook engaging portion 23. The reinforcing member 17 can be easily transported to the lower portion of the traveling beam 1 while avoiding the interference below the traveling beam 1 and the horizontal posture of the reinforcing member 17 disposed below the traveling beam 1 is finely adjusted. be able to.

Next, what is shown in FIG. 9 shows the hanging jig 31 of 2nd Embodiment which concerns on this invention. In addition, the same code | symbol is attached | subjected to the same component as the structure shown in FIGS. 1-8, and description is abbreviate | omitted.
The hanging jig 31 according to the second embodiment includes a frame body 32 that rises on one side in the longitudinal direction. The frame 32 is a member formed by framing H-shaped steel. The lower frame 32a, the upper frame 32b, and the ends of the lower frame 32a and the upper frame 32b are connected to each other. A connecting frame body 32c to be connected and a rod-shaped reinforcing portion 32d directly connecting the lower side frame body 32a and the upper side frame body 32b are provided.

Although not shown in FIG. 9, a fixing portion 20 for detachably fixing the reinforcing member 17 is provided at the end of the upper side frame 32b, and the auxiliary hook engaging wire is provided on the lower side frame 32a. 21, a balance weight 22 and a main hook engaging portion 23 are provided.
In the hanging jig 31 of the second embodiment, a difference in height L is provided between the lower frame 32a and the upper frame 32b of the frame 32.

Here, there is an overhead crane in which the height of the lower portion of the traveling beam 1 to be reinforced is higher than the winding heights of the main hoisting device 7 and the auxiliary hoisting device 9. When reinforcing the traveling girder 1 of such an overhead crane, if the hanging jig 15 shown in FIG. 2 is used, the reinforcing member 17 cannot be disposed below the traveling girder 1.
However, the suspension jig 31 according to the second embodiment includes a lower side frame 32a with which the main hook 6 of the main hoisting device 7 and the auxiliary hook 8 of the auxiliary hoisting device 9 are engaged, and an upper side frame to which the reinforcing member 17 is fixed. Since the difference of the height L is provided between the body 32b and the height L, the winding height of the main winding device 7 and the auxiliary winding device 9 is determined.

  Therefore, even if the overhead crane is higher than the hoisting height of the main hoisting device 7 and the auxiliary hoisting device 9, the reinforcing member 17 is fixed to the hanging jig 31 of the second embodiment. When the reinforcing work is performed, the reinforcing member 17 can be surely disposed at the lower portion of the traveling beam 1 at a high position, so that the traveling work of the traveling beam 1 can be performed normally.

DESCRIPTION OF SYMBOLS 1 ... Traveling girder 1a ... Upper flange 1b ... Web 1c ... Lower flange 2 ... Traveling rail 3 ... Wheel 4 ... Crane main girder 5 ... Club 6 ... Main hook 7 ... Main hoisting device 8 ... Supplementary hook 9 ... Supplementary hoisting device 10 ... Box girder 11 ... Saddle 12 ... Traverse rail 13 ... Wheel 15 ... Suspension jig 17 ... Reinforcement member 17a ... Reinforcement web 17b ... Reinforcement flange 17c ... Reinforcement rib 18 ... Base 19 ... Frame body 20 ... Fixing part 21 ... Supplementary hook Engagement wire 22 ... balance weight 23 ... main hook engagement part 24 ... bracing part 25 ... fixing bolt 26 ... flange fixing part 27 ... fixing plate 28 ... connecting bolt 29 ... connecting plate 30 ... column 31 ... hanging jig 32 ... frame Body 32a ... Lower side frame 32b ... Upper side frame 32c ... Connection frame 32d ... Reinforcement part H ... Tall equipment in the building interior

Claims (5)

A pair of traveling girders extending parallel to each other near the ceiling of the building, a crane main girder that runs between the pair of traveling girders, a club that traverses the crane main girder, and this club A method of reinforcing the traveling girder of an overhead crane equipped with a hoisting device mounted on
Engage the hook provided at the tip of the wire of the hoisting device to the hanging jig placed on the ground directly below the overhead crane,
A long reinforcing member that reinforces the traveling girder is detachably fixed to one end of the hanging jig different from the position where the hook is engaged,
By lifting the hoisting device, the hoisting jig holding the reinforcing member horizontally is lifted up to the height of the traveling beam to be reinforced,
By moving the crane main girder and traversing the club, the suspension jig is moved in the horizontal direction with the one end fixed to the reinforcing member as the head, and along the lower part of the traveling girder to be reinforced. Move to the position,
After temporarily fixing the reinforcing member moved to a position along the lower part of the traveling beam with a temporary fixing member, the fixing of the reinforcing member to the hanging jig is released,
A traveling girder reinforcing method for an overhead crane, wherein the reinforcing member is fixed to a lower portion of the traveling girder by welding. The winding device is a first winding device and a second winding device mounted on the club,
The lifting jig increases the weight of the other end opposite to the one end to which the reinforcing member is fixed, and the first hoisting device has a first weight between the one end and the other end. One hook engages and the suspension jig tries to tilt toward the other end with the portion engaged with the first hook as the center. The second hook engages with the other end. The overhead crane traveling girder reinforcement method according to claim 1, wherein the lifting posture of the lifting jig is adjusted by performing a winding / rewinding operation of the second winding device.   The overhead crane is an overhead crane for steel making in which the first hoisting device is a main hoisting device that lifts a ladle, and the second hoisting device is an auxiliary hoisting device that tilts the ladle. The traveling girder reinforcement method for an overhead crane according to claim 2. A hanging jig used in the traveling girder reinforcement construction method of the overhead crane according to claim 2 or 3,
A rectangular frame in plan view;
A fixing portion which is provided on one side in the longitudinal direction of the frame body and detachably fixes the reinforcing member;
A second hook engaging portion provided on the other side in the longitudinal direction of the frame body and engaged with the second hook;
A balance weight fixed to the other side in the longitudinal direction of the frame and making the other side heavier than the one side;
A traveling hook reinforcement method for an overhead crane, comprising: a first hook engaging portion provided on the frame body between the balance weight and the fixed portion and engaged with the first hook. The hanging jig to be used.   One side in the longitudinal direction of the frame body is formed so as to rise so that the fixed portion is positioned above the portion where the first hook engaging portion and the second hook engaging portion are provided. The hanging jig used in the traveling girder reinforcement construction method for an overhead crane according to claim 4.

Images