JP2687000B2 - Jib crane assembly equipment - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a jib crane assembling apparatus, and more particularly to an assembling apparatus suitable for assembling a main pillar of a guide.

[Conventional technology]

Generally, when constructing a transmission line tower, etc., a guideline having a main pillar whose top is supported vertically by a plurality of support wires and vertically erected, and a boom extending obliquely from the lower end of the main pillar is used. First, a method of assembling and constructing a steel tower and the like using the assembled guide is adopted.

By the way, conventionally, in order to assemble a guide rig, first, a plurality of divided pillars are laid on the ground and sequentially connected in the longitudinal direction to assemble the entire length of the main pillar, and then the whole main pillar is pulled by the supporting wires. The vertical method is adopted.

[Problems to be solved by the invention]

In the conventional method for assembling the jib crane, since the main pillar is assembled in a lying state and then it is erected vertically, a wide flat work space is required around the standing position of the main pillar. .

However, when constructing transmission line towers on slopes in the mountains, it is difficult to secure a flat ground where assembly work can be done, and it takes a lot of time to assemble the jib crane. Since it is built up, it is extremely dangerous and causes many occupational accidents.

The present invention has been made in view of the present situation, and even when the jib crane has to be installed on the slope of a mountain, the main pillar can be assembled in a short time and safely, and an assembling apparatus. The purpose is to provide.

[Means for solving the problem]

A method for assembling a jib crane according to the present invention provides an assembling apparatus that includes an elevating mechanism that lifts and holds each of the divided pillars at a length equal to or more than the length of the main pillar, which is formed by connecting a plurality of divided pillars. The uppermost split pillar is set in the assembling device, the split pillar is lifted and held by the elevating mechanism, and then the next split pillar is set in the assembling device so that its upper end is It is characterized in that it is connected to the lower end of the uppermost divided pillar, and both connected divided pillars are lifted and held by the elevating mechanism, and thereafter this operation is repeated to successively connect the divided pillars. And

Further, the assembly device of the jib crane according to the present invention is a jib crane configured by a plurality of split pillars in which a main pillar is vertically connected, and is installed at required intervals at the standing position of the main pillar, and the length of the split pillar is long. At least two elevating cylinders having an elevating stroke of not less than this; a connecting plate for connecting the upper ends of the rods of each of these elevating cylinders to each other; and an upper end connected to the connecting plate and installed between the elevating cylinders. An elevating frame in which the split pillar is loaded from the side and set in the central part; and is attached to this elevating frame so that it can swing only upward from a horizontal position, and when the elevating frame rises,
The split pillars are lifted by being locked from the bottom by the locking portions of each split pillar, and at the time of lowering of the elevating frame, they come into contact with the locking portions of each split pillar from above and swing upward to lower the lift frame. And a permitting one-way locking member.

[Action]

In the method for assembling a jib crane according to the present invention, an assembling apparatus having an elevating mechanism is installed at the standing position of the main pillar, and the assembling apparatus connects the plurality of divided pillars in the vertical direction to form the main pillar. To be done.

That is, in the assembling apparatus, first, the uppermost divided pillar having a support rope attached to the tip thereof is set, and the divided pillar is lifted and held by the elevating mechanism to a length equal to or larger than the length of the next divided pillar. Next, the divided pillar of the next stage is set in the assembling apparatus, and the upper end of the divided pillar is connected to the lower end of the uppermost divided pillar to be integrated. Then, after that, the two divided pillars that are integrally connected are lifted and held below the length of the divided pillars to be connected by the elevating mechanism. After that, the main pillars are constructed by repeating the same operation as described above to connect the divided pillars. During this time, the main column is held upright by the tension of the rope attached to the tip split column.

In this way, by connecting the divided pillars sequentially from the top one in a vertical state, the main pillar can be easily and safely erected even if there is no wide flat portion around the erected position of the main pillar. It will be possible.

Further, in the assembly device of the jib crane according to the present invention, each divided pillar constituting the main pillar, from the uppermost divided pillar,
It is set from the side of the lifting frame to its center. The elevating frame is lifted through the connecting plate by the extension operation of each elevating frame cylinder, and this elevating frame is one-way locked to the engaging part of each split pillar from below when it is raised. Since the member is provided, the uppermost divided pillar is lifted by the elevation of the elevating frame, and is held at a position where a height is secured below which the next divided pillar can be arranged.

Next, in the center of the elevating frame, the next split pillar is set from the side, and the lower end of the uppermost split pillar is placed on the upper end of the next split pillar as the elevator frame descends. . Therefore, these two divided pillars are connected and integrated.

Then, the elevating frame is further lowered. Then, the one-way locking member comes into contact with the locking portion of the divided column of the next stage from the upper side, but since the one-way locking member can swing from the horizontal position to the upper side, The contact with the stopper swings upwards, which allows the elevating frame to descend.

When the elevating frame is raised after the one-way locking member is lowered until it passes through the locking portion of the split column of the next stage, the one-way locking member engages with the locking portion of the split column of the next stage from below. It is stopped, which raises the two interconnected pillars.

By performing the above operation for each divided pillar, the lower divided pillar is sequentially connected to the lower portion of the upper divided pillar. The main pillar is constructed upright.

〔Example〕

Hereinafter, a first embodiment of the present invention will be described with reference to the drawings.

FIG. 1 shows an example of an assembly apparatus for a jib crane according to the present invention. In the figure, reference numeral 1 is an assembly apparatus, reference numeral 2 is a main pillar of a jib crane assembled by the assembly apparatus 1, and the main pillar 2 Constitutes a jib crane together with a boom 3 and a lifting hook 4 extending obliquely from its lower end.

As shown in FIG. 2, the assembling apparatus 1 is provided with two lifting cylinders 5 which are installed on both sides of the main pillar 2 at required intervals, and the lifting stroke constitutes the main pillar 2. It is set to be longer than the length of each of the plurality of divided pillars 2a. As shown in FIGS. 2 and 3, the upper ends of the rods 5a of the two lifting cylinders 5 are connected to each other by a connecting plate 6 having a substantially U-shape. The upper end of the elevating frame 7 arranged between the elevating cylinders 5 is connected.

As shown in FIG. 2, the elevating frame 7 is provided with two rods 8 whose upper ends are connected to the connecting plate 6 and an elevating plate 9 which connects the lower ends of these rods 8 to each other. As shown in FIG. 4, the plate 9 is formed in a substantially U-shape, and one-way locking members 10 for lifting and holding the divided columns 2a are attached to both sides of the upper surface thereof.

As shown in FIGS. 2 and 4, each of these one-way locking members 10 is provided with a metal fitting 12 that swings upward from a horizontal position about a fulcrum pin 11 as an axis. ,
Guide rollers 13 are attached respectively.

On the other hand, each divided pillar 2a constituting the main pillar 2 is composed of four pipe members 14 as shown in FIGS. 2 to 4, a connecting plate 15 for connecting each of the pipes 14 into a square pillar shape, and each pipe. It is provided with a rectangular end plate 16 welded to the upper and lower ends of the material 14,
The divided columns 2a are sequentially connected in the vertical direction by connecting the end plates 16 with butt bolts. When the elevating frame 7 is raised, the one-way locking member 10 holds the fitting 12 from below to the connecting plate 15 and lifts the split column 2a, as shown in FIGS. 2 and 4. At the time of lowering the elevating frame 7, the metal fitting 12 abuts the connecting plate 15 and the end plate 16 from the upper side and swings upward, thereby allowing the elevating frame 7 to descend.

As shown in FIGS. 2 and 3, a pair of guide members 17 for supporting the divided columns 2a from both sides are provided on the upper surface of the connecting plate 6. Each of these guide members 17,
The swing block 19 is swingable upward from the horizontal position about the fulcrum pin 18 as an axis. At the tip of the swing block 19, a guide metal fitting 20 for holding the pipe material 14 of the split column 2a is provided. Has been. Each of the guide members 17 supports the split column 20 from both sides when the elevating frame 7 is raised, and contacts the end plate 16 of the split column 2a from above and swings upward when the elevating frame 7 is lowered. It moves so that the elevating frame 7 is allowed to descend.

A base plate 21 is arranged at the lower ends of both the lifting cylinders 5 as shown in FIGS. 2 and 5.
In the central portion of the base plate 21, the divided pillars are sequentially loaded into the central portion of the elevating frame 7 from the side surface thereof and set.
A recess 22 is provided for determining the set position of the 2a, and the split pillar 2a that has been carried in is provided at the inner edge of the recess 22 in the carrying direction of the split pillar 2a.
The rough guide 23 that abuts 2a and positions it,
It is provided with the required rising dimension.

Next, a method of assembling the jib crane using the assembling apparatus 1 according to this embodiment will be described.

When assembling the jib crane, first, the divided pillars 2a are sequentially connected in the vertical direction to assemble the main pillar 2 in an upright state.
After that, the boom 3 is assembled using the main pillar 2.

When assembling the main pillar 2, first, the base plate 21 is installed at the installation position of the main pillar 2, and the two lifting cylinders 5 are installed on the base plate 21. Then, the upper ends of the rods 5a are connected by the connecting plate 6, and the elevating frame 7 is attached to assemble the assembling apparatus 1.

Then, the elevating frame 7 is lowered to the lowermost end. The elevating plate 9'in FIG. 2 is the position of the elevating plate 9 when the elevating frame 7 is lowered to the lowermost end. In this state, the uppermost division value 2a is carried into the center portion of the elevating frame 7 from its side surface side, specifically, from the notch side of the connecting plate 6 and the elevating plate 9 and set. It should be noted that one end of a required number of upright support probes 24 is fixed to the upper part of the uppermost divided pillar 2a.

At this time, the uppermost divided pillar 2a is an exception, when the lower end thereof is set in the recess 22 of the base plate 21,
The length of the upper end portion is set to project above the position of the connecting plate 6 so that the upper end portion can be supported by the guide member 17 when the uppermost divided column 2a is lifted by the elevating frame 7. Further, when the uppermost divided pillar 2a is set in the central portion of the elevating frame 7, since there is a notch in the connecting plate 6 and the elevating plate 9, there is no problem, but the one-way locking member 10 and If the guide member 17 is swung to a horizontal position, the split pillars 2a of the uppermost stage 2a cannot contact and set against them, so that the guide pillars 17 are swung upward so as not to interfere with the set of the split pillars 2a. To And after the set,
Return to horizontal position.

In this way, when the uppermost divided pillar 2a is set in the central portion of the elevating frame 7, both elevating cylinders 5 are extended to raise the elevating frame 7. At the beginning of the ascent, only the elevating frame 7 ascends and the uppermost split column 2a is not lifted, but when the ascending / descending plate 9 ascends to the position shown by the solid line in FIG. Nokanaku 12 is a connecting plate 15
Is locked from below. Therefore, when the elevating frame 7 further rises, the uppermost divided pillar 2a is lifted by the elevating frame 7.

When both the elevating cylinders 5 extend to the extension limit, they are temporarily stopped in that state. The position of the elevating plate 9 of the elevating frame 7 in this state is slightly above the position of the elevating plate 9 "shown in FIG. 2, and at this time, from the lower end of the uppermost dividing pillar 2a to the base plate 21. A space above and below is formed with a length equal to or longer than the length of the divided pillars 2a other than the uppermost one (these all have the same length dimension).

Therefore, in this state, the divided column 2a of the next stage (second from the top) is carried in between the two lifting cylinders 5 and set in the recess 22 of the base plate 21. After that, both lifting cylinders 5 are slightly contracted to lower the lifting plate 9 of the lifting frame 7 to the position indicated by reference numeral 9 ″ in FIG. 2. As a result, the fraction 16 at the lower end of the uppermost dividing pillar 2a is 16 But,
It is placed on the end plate 16 at the upper end of the divided pillar of the next stage set in the recess 22. Therefore, the upper and lower split columns 2a are integrated by bolting the end plates 16 together.

Next, both the elevating cylinders 5 are contracted to the contraction limit, and the elevating frame 7 is lowered. At this time, the one-way locking member 10 and the guide member 17 come into contact with the connecting plate 15 and the end plate 16 from above as the elevating frame 7 descends.
Since the members 10 and 17 have a structure that can be freely swung upward from the horizontal position, they are swung upward by abutting the connecting plate 15 and the end plate 16 and, after overcoming these, descending. Therefore, the elevating frame 7 can be lowered to the bottom dead center without any trouble.

When the elevating frame 7 descends to the bottom dead center, both elevating cylinders 5 are extended to operate the uppermost divided column 2a and the next divided column 2a.
2a and 2a are simultaneously lifted by the lifting frame 7.

After that, the same operation as described above is repeated to sequentially connect the upper divided pillar 2a to the lower divided pillar 2a. And
If you connect up to the bottom split pillar 2a, the end plate of the lower end
The main pillar 2 is completed by fixing 16 on the base plate 21 with bolts or the like.

As shown in FIG. 1, a fixed wire 24 for fixing the main pillar 2, an operation wire 25 for operating the boom 3, and a hook wire 26 for the lifting hook 4 are attached to the main pillar 2. However, these are mounted so that they can be reached from the ground when connecting the divided pillars 2a one after another.

After the main pillar 2 is assembled in this way, the boom 3 is assembled next. As with the main pillar 2, this boom 3 is also the first
As shown in the figure, it is configured by connecting a plurality of divided bodies 3a. However, the boom 3 may be pulled up by using the operating wire 25 after the divided bodies 3a are connected in advance on the ground. Alternatively, the uppermost divided body 3a may be connected to and pulled up by the actuation wire 25, and the divided bodies 3a may be sequentially connected to the lower side thereof while pulling up the actuation wire 25. In any case, since the main pillar 2 can be used, the boom 3 can be assembled very easily and safely.

Since the main pillar 2 can be assembled by sequentially connecting the divided pillars 2a in an upright state, the main pillar 2 can be easily and safely assembled even when there is no wide flat portion around the upright position of the main pillar 2. Two
Can be erected. Once the main pillar 2 is erected, other work such as assembling of the boom 3 can be performed using the erected main pillar 2, so the work is extremely easy.

6 and 7 show a second embodiment of the present invention in which the structure of the main pillar 2 is changed and the assembling apparatus 1 is partially changed according to the structure of the main pillar 2. is there.

That is, as shown in FIG. 6, the main pillar 2 in the present embodiment is connected to a plurality of divided pillars 2a of the same length which are sequentially connected in the vertical direction and an upper portion of the upper divided pillar 2a. As shown in FIG. 6, the tip post 2b is configured to have an extremely short dimension as compared with the length of the other split runs 2a.

As shown in FIG. 6, each of the divided columns 2a has a circular flange-shaped end plate 31 welded to the upper and lower ends of the cylindrical member 30, respectively.
And a locking flange 32 for the one-way locking member 10 that is welded from the lower end of the cylindrical member 30 to a slightly upper position,
At the center of the end plate 31 at the lower end of the cylindrical member 30, a hole 33 into which a positioning pin 34 described later is inserted is provided.

Further, as shown in FIG. 6, the tip post 2b has a short cylindrical member 35, a circular flange-shaped end plate 36 welded to the lower end of the cylindrical member 35, and an upper end of the cylindrical member 35. And a large-diameter ring member 37 to which various wires (not shown) are locked, and the end plate 36 is bolted to the end plate 31 at the upper end of the split column 2a immediately below the end plate 36. .

On the other hand, the assembling apparatus 1 has almost the same structure as the assembling apparatus 1 of the first embodiment, but the following points are different.

That is, the connecting plate 6 of the assembling apparatus 1 in the present embodiment has an octagonal shape as shown in FIG. 7, and has a larger diameter than the end plates 31 and 36 and a ring member at the center thereof. A guide hole 38 having a diameter smaller than 37 is provided, and the guide member 17 in the first embodiment is provided on both sides of the guide hole 38.
Instead, receiving blocks 39 are provided respectively. The tip post 2b is inserted into the guide hole 38 from above, and the ring member 37 at the upper end thereof is supported by the receiving block 39 from the lower surface side.

Further, in the central portion of the base plate 21 of the assembling apparatus 1,
As shown in FIG. 6, a pedestal 40 for welding the divided pillars 2a sequentially loaded from the side surface is welded to the central portion of the elevating frame 7, and the divided pillars 2a are attached to the central portion of the pedestal 40. Positioning pin inserted into the hole 33 of the end plate 31 at the lower end for positioning
34 are installed.

Next, a method of assembling the jib crane using the assembling apparatus 1 according to this embodiment will be described.

When assembling the jib crane, first, the assembling apparatus 1 is assembled at the installation position of the main pillar 2 by the same method as in the first embodiment.

Next, with the elevating frame 7 being lowered to the bottom dead center position, the tip column 2b is inserted into the guide hole 38 of the connecting plate 6 from above.
Insert Then, the ring material 37 is placed on the receiving block 39.

Next, both lifting cylinders 5 are slightly extended to raise and lower the lifting frame 7 slightly. This allows the tip post
Between the lower end of 2b and the pedestal 40, a vertical distance equal to or longer than the length of each divided pillar 2a is secured. Therefore, the uppermost divided pillar 2a is loaded into the elevating frame 7 from the side surface side, and the hole 33 of the end plate 31 at the lower end thereof is carried in.
The division value 2a is set on the pedestal 40 with the positioning pin 34 inserted in. As a result, the center of the tip column 2b and the center of the split column 2a are completely aligned.

Next, both lifting cylinders 5 are contracted to lift the lifting frame 7
Is slightly lowered to mount the tip post 2b on the split post 2a, and the end plates 31 and 36 of both are bolted to each other to integrate the tip post 2b and the top split post 2a.

Next, the both elevating cylinders 5 are further contracted to lower the elevating frame 7 to the bottom dead center position. As a result, the elevating plate 9 at the lower end of the elevating frame 7 descends to the position indicated by the reference numeral 9'in FIG. 6, and the one-way locking member 10 becomes the uppermost split pillar.
It comes under the locking flange 32 of 2a. Therefore, both lift cylinders 5 are extended. Then, the one-way locking member 10 is locked to the locking flange 32 from the lower side, and the tip column 2b and the uppermost split column 2a are lifted as the elevating frame 7 rises.

When both the elevating cylinders 5 extend to the extension limit and the elevating frame 7 rises to the top dead center, the elevating plate 9 at the lower end of the elevating plate 7 becomes the position indicated by reference numeral 9 ″ in FIG. Between the lower end of the divided pillar 2a and the pedestal 40, a vertical distance equal to or longer than the length of the divided pillar 2a in the next stage is secured.
The divided pillar 2a of the next stage is carried in from the side between the two lifting cylinders 5 and set on the pedestal 40.

Next, both lifting cylinders 5 are slightly contracted, and the uppermost divided pillar 2a is placed on the next divided pillar 2a, so that the mutual end plates
31 is bolted and integrated. Then, after that, both the elevating cylinders 5 are reduced to the reduction limit, and the elevating frame 7 is lowered to the bottom dead center position.

After that, the same operation as described above is repeated to sequentially connect the lower divided pillar 2a to the lower side of the upper divided pillar 2a. For this operation, the end plate 31 at the lower end of the lowermost divided pillar 2a is fixed to the pedestal 40 with bolts or the like.

Therefore, according to this embodiment as well, the main pillar 2 is assembled in an upright state, and the same effect as that of the first embodiment can be expected.

In addition, in both of the above-described embodiments, when the main pillar 2 is assembled, the case where the divided pillar 2a or the tip pillar 2b is supported at two positions of the connecting plate 6 position and the elevating plate 9 position has been described. A mechanism similar to that of 17 may be provided in the middle portion of the rod 8 and supported at three or more places. Further, the one-way locking member 10 does not necessarily have to be provided on the elevating plate 9, but may be provided at an intermediate portion of the rod 8. Also. The number of lifting cylinders 5 is not limited to two, and if the split pillars 2a can be carried in from the side between them, it will be 3
More than one book may be used.

〔The invention's effect〕

As described above, the method for assembling the jib crane according to the present invention is a lifting mechanism that lifts and holds each of the divided pillars in the standing position of the main pillar that is formed by connecting a plurality of divided pillars. Install the assembling device equipped with, and at the same time, set the uppermost dividing pillar to this assembling device, lift and hold this dividing pillar by the lifting mechanism, and then set the next dividing pillar to the assembling device. The upper end of the split pillar is connected to the lower end of the uppermost split pillar, and both of the connected split pillars are lifted and held by the elevating mechanism. Thereafter, this operation is repeated to sequentially connect the split pillars. Therefore, the main pillar can be assembled in an upright state.
Therefore, the main pillar can be easily and safely assembled even when there is no wide flat work space around the slope or the like in the mountains.

Further, the assembly device for a jib crane according to the present invention is provided with at least two lifting cylinders which are installed at required intervals at the standing position of the main pillar and have a lifting stroke equal to or longer than the length of each of the divided pillars; A connecting plate for connecting the upper ends of the rods to each other; an upper end connected to the connecting plate and arranged between the elevating cylinders, and an elevating frame in which each divided pillar is carried in from a side surface side and set in a central part. ; bk It is attached to the elevating frame so that it can be swung only upward from the horizontal position, and when the elevating frame rises, it is locked from below by the locking part of each split column to lift the split column and lower the elevating frame. Sometimes, a one-way locking member that abuts on the locking portion of each split pillar from above and swings upward to allow the elevating frame to descend.
Since it is equipped with, it is possible to sequentially connect the divided pillars by a simple operation of raising and lowering the elevating frame. Further, since each divided pillar can be carried in and set from the side surface side into the central portion of the elevating frame, the connecting work between the divided pillars is extremely easy.

[Brief description of the drawings]

FIG. 1 is an overall configuration diagram showing an assembly device for a jib crane and a jib crane assembled by this device according to the first embodiment of the present invention, FIG. 2 is a detailed view of the assembly device, and FIG. 3 is a connecting plate portion. FIG. 4 is an enlarged view seen from above in FIG.
The figure is an enlarged view of the lifting plate seen from above in Figure 2,
FIG. 5 is an enlarged view of the base plate portion viewed from above in FIG. 2, FIG. 6 is a view corresponding to FIG. 2 showing a second embodiment of the present invention, and FIG. 7 is a connecting plate portion above in FIG. FIG. 1 ... Assembly device, 2 ... Main column, 2a ... Split column, 2b ... Tip column, 3 ... Boom, 4 ... Lifting hook, 5 ... Lifting cylinder, 5a, 8 ... Rod, 6 ...... Connecting plate, 7
...... Lifting frame, 9, 9 ', 9 "...... Lifting plate, 10 ...... One-way locking member, 11 ...... Support pin, 12 ...... Metal fittings, 15 ...... Connecting plate, 17 ...... Guide member, 21 ...... Base plate, 22 ……
Recess, 23 …… Rough guide, 32 …… Locking flange, 34 ……
Locating pin, 39 ... Receiving block, 40 ... Pedestal.

Claims (1)

(57) [Claims] 1. A jib crane assembling apparatus in which a main pillar is composed of a plurality of split pillars connected in the vertical direction, the jigs being installed at required intervals at the standing position of the main pillar and having a length of at least the length of each of the split pillars. At least two elevating cylinders having elevating strokes; a connecting plate connecting the upper parts of these elevating cylinders; an upper end connected to the connecting plate and arranged between the elevating cylinders; An elevating frame which is received from the side and supported in the central part; mounted on the elevating frame so as to be swingable only from the horizontal position upward, and when the elevating frame rises, is locked from below by the locking part of each split pillar While lifting the split pillar, when lowering the lifting frame,
A one-way locking member that abuts on the locking portion of each divided pillar from above and swings upward to allow the elevating frame to descend.