JP6189132B2 - Elevator support stand that can be adjusted in position according to changes in the outer diameter of the cylindrical structure - Google Patents

Description

  The present invention relates to an elevator support frame that supports various elevators used in the construction, dismantling, and repair work of a cylindrical structure such as a chimney.

In the construction, dismantling, and repair work of a cylindrical structure such as a chimney (hereinafter referred to as a cylindrical structure), various elevators are used depending on the dimensions and location conditions of the cylindrical structure.
A jack type elevator that has been put to practical use as an elevator used for such a purpose, as disclosed in Patent Document 1, for example, drives a jack to raise and lower a step rod. When the jack type elevator is used for the construction, dismantling, and repair work of a cylindrical structure, a base for supporting the jack type elevator (hereinafter referred to as an elevator support base) is installed around the cylindrical structure. Then, the step rod is moved up and down by the jack type elevator fixed to the elevator support frame, and the scaffold attached to the lower end of the step rod is moved in the vertical direction to perform construction, dismantling and repair work. It is also possible to raise and lower a platform for carrying various devices and materials used in construction, dismantling and repair work as well as work scaffolds.

In particular, in the construction work of a cylindrical structure, the jack type elevator can also be used for the work of lifting a new block body in which a part of the cylindrical structure is partially constructed. In the disassembling work, it is also possible to suspend a lump produced by partially disassembling the cylindrical structure with a jack type elevator.
In the technique disclosed in Patent Document 1, a plurality of columns are installed around a cylindrical structure, a scaffold is provided at the upper end of the column, a jack type elevator is fixed, and the step rod is moved up and down by the jack type elevator. It is. In other words, a ring-shaped beam (hereinafter referred to as a ring beam) is attached to the lower end of the step rod, and the ring beam is moved up and down while the center of the cylindrical structure and the center of the ring beam coincide with each other. Perform construction, dismantling and repair work.

However, in recent years, large-sized cylindrical structures (for example, chimneys with increased height) have been built, and the cylindrical structure is gradually reduced in diameter toward the top by gradually reducing the outer diameter of the cylindrical structure. The weight of the entire load is reduced and the earthquake resistance is improved.
And, when using the technology disclosed in Patent Document 1 in the construction, dismantling, and repair work of a cylindrical structure whose outer diameter is gradually reduced toward the top (hereinafter referred to as the top reduced cylindrical structure) First, a pillar is installed on the outer side of the lower layer of the reduced top tubular structure (that is, the part with the larger outer diameter), and the ring beam is moved up and down by moving the step rod up and down with a jack type elevator installed on the scaffold at the upper end. To work. Therefore, it is necessary to set the inner diameter of the ring beam to be larger than the outer diameter of the lower layer portion of the top reduced tubular structure.

When such a ring beam is used to work on the upper layer portion (that is, the portion having a small outer diameter) of the top reduced cylindrical structure, the distance between the ring beam and the top reduced cylindrical structure is increased. This will not only hinder the progress of the project, but also has an adverse effect on safety.
In the construction, dismantling, and repair work of the upper part of the top reduced cylindrical structure, it is possible to replace the ring beam with a smaller inner diameter, but it takes a lot of time to replace the ring beam. It causes a decrease in efficiency. In addition, the ring beam is not very versatile, and it is difficult to divert it to work on parts with different dimensions (for example, outer diameter, thickness, etc.) and weight of the top reduced cylindrical structure. I have to do it. As a result, not only the production cost of the ring beam increases, but also a problem that the load of inventory management increases.

  Without replacing the ring beam, attach a lifting tool that extends from the ring beam toward the top reduced tubular structure, and use the lifting tool to lift a new block for construction. Although it is possible to lower or lift the scaffolding and loading platform, it is difficult to improve the stability of the suspended load because it cannot solve the problem that the interval between the ring beam and the top reduced tubular structure is widened, This causes a problem in safety and causes a reduction in work efficiency.

  Patent Document 2 discloses a technique for repairing a top reduced tubular structure using a ring beam whose inner diameter can be changed. Although it is not disclosed that the ring beam is used for the construction and dismantling work of the top reduced tubular structure, the technique disclosed in Patent Document 2 is used in the construction and dismantling work of the top reduced tubular structure. However, it is necessary to install a column on the outer side of the lower layer portion (that is, the portion having a large outer diameter) of the top reduced cylindrical structure. And it is necessary to work while raising and lowering the ring beam by raising and lowering the step rod with a jack type elevator provided on the column.

Then, when working on the upper layer portion of the top reduced tubular structure (that is, the portion having a small outer diameter), if the inner diameter of the ring beam is reduced, the center of the top reduced tubular structure and the center of the ring beam are made to coincide. Therefore, the position of the support column must be adjusted, but a technique using a support column that can change the installation location has not yet been established.
In addition to the top reduced cylindrical structure described above, a large number of cylindrical structures (hereinafter referred to as “top enlarged cylindrical structures”) whose outer diameter is gradually enlarged toward the top are also built. Similarly, in the construction, dismantling, and repair work of the enlarged top tubular structure, the position of the column must be adjusted in order to match the center of the enlarged top tubular structure with the center of the ring beam. Occurs.

  Hereinafter, the top reduced cylindrical structure and the top enlarged cylindrical structure are collectively referred to as an enlarged / reduced diameter cylindrical structure.

JP 2004-316333 A JP 2005-213870

  The present invention eliminates the problems of the prior art and supports the elevator in the construction, dismantling, and repair work of the expanded / reduced diameter cylindrical structure, and the outer diameter of the expanded / reduced diameter tubular structure part that performs the work. An object of the present invention is to provide an elevator support frame whose position can be adjusted accordingly.

This inventor examined the elevator support stand suitable for carrying out construction, dismantling, and repair work of an enlarged / reduced diameter cylindrical structure. And
(A) In order to keep the interval between the expansion / contraction diameter cylindrical structure and the elevator properly, it is necessary to adjust the position of the elevator support frame according to the outer diameter of the part to be operated.
(B) It is possible to adjust the position of the elevator support frame by moving the elevator support frame in a direction approaching the center of the expansion / contraction diameter cylindrical structure or a direction away from the center (hereinafter referred to as a radial direction). I understood. And we studied in detail the case where a large load acts on the elevator as in the construction and dismantling work of expansion / contraction diameter cylindrical structure. as a result,
(C) Since two or more elevators must be used in order to stably support a large load, it is necessary to install elevator support frames at equal intervals in two or more places around the expansion / contraction diameter cylindrical structure. ,
(D) In order to prevent the elevator support platform from being deformed or overturned during work, it is necessary to connect the elevator support platforms and mutually reinforce the elevator support platforms adjacent to each other.
(E) When moving the elevator support frame in the radial direction of the expansion / contraction diameter cylindrical structure, it is necessary to release the connection and to connect again after the movement is completed.
(F) If a moving member (for example, a wheel) is provided at the lower part of the elevator support frame, it will be difficult to support a large load. It has been found that it is necessary to make them slide, or to slide against a beam-like structure provided on the foundation.

Note that the above (D) and (E) are not necessarily required when the load acting on the elevator is relatively small as in repair work. Moreover, safety | security can be ensured by moving the elevator support stand in the state which mounted the expansion / contraction diameter cylindrical structure on the foundation.
The present invention has been made based on such knowledge.
That is, the present invention is an elevator support frame for supporting an elevator used in the construction, dismantling, and repair work of an enlarged / reduced diameter cylindrical structure, on the basis of the enlarged / reduced diameter cylindrical structure in the radial direction. possess a movable carriage which can slide beam-like structure Butsujo provided slidably or on a foundation, a holder for holding the elevator is standing on a moving platform, a a, a holder fixed side Bolts provided at the adjustment end of the connecting frame, having a connecting frame that is arranged horizontally with the fixed end fixed to the beam and that has bolt mounting holes for removably mounting the bolt at the adjusting end. a lift support cradle for the bolt fixing holes Ru provided for adjusting the side beams of the holding table for passing a bolt which is mounted in the mounting hole.

In elevator support cradle of the invention, it is preferable to have a moving jack for moving the transfer Dodai toward the center of the expansion diameter cylindrical structure.

  According to the present invention, in the construction, dismantling, and repairing work of the expansion / contraction cylindrical structure, the position of the elevator support frame is supported according to the outer diameter of the part of the expansion / contraction diameter cylindrical structure that supports the elevator and performs the work. Since it can be adjusted, it has a remarkable industrial effect.

It is a horizontal sectional view which shows typically the example which installed the elevator support stand of the present invention in the circumference of a top reduction cylindrical structure. It is a horizontal sectional view which expands and shows 1 set of the 3 sets of elevator support stand in FIG. FIG. 3 is a vertical sectional view taken along arrow AA in FIG. 2. It is a horizontal sectional view showing typically the example which moved the elevator support stand of the present invention. It is a perspective view which shows the example which hangs down a top reduced cylindrical structure with the hook attached to the step rod.

Hereinafter, construction, disassembly, and repair work of the top reduced cylindrical structure will be described as an example of the expanded / reduced diameter cylindrical structure.
FIG. 1 is a horizontal cross-sectional view schematically showing an example in which the elevator support frame of the present invention is installed around the lower layer portion (that is, the portion having a large outer diameter) of the top reduced tubular structure. FIG. 1 shows an example in which three elevator support frames are installed at equal intervals around the top reduced cylindrical structure. By using two or more elevator support frames according to the present invention, the top reduced cylinder shape is used. It is possible to construct, dismantle and repair structures.

Below, with reference to FIG. 1, the example which performs the dismantling operation | work of a top reduced cylindrical structure using three elevator support stand is demonstrated. A description will be given of an example in which the elevator disposed on each elevator support frame is a jack type elevator, and a step rod that is a suitable combination for the jack type elevator is used.
When disassembling the top reduced cylindrical structure using the elevator support frame of the present invention, as shown in FIG. 1, the outer side of the lower layer portion (that is, the portion having a large outer diameter) of the top reduced cylindrical structure 2 Elevator support bases 1 are installed at regular intervals. One of the three elevator support bases 1 in FIG. 1 is enlarged and shown in FIG. 2, and a vertical sectional view taken along arrow AA in FIG. 2 is shown in FIG.

  As shown in FIG. 3, the elevator support frame 1 is installed on the foundation 3 of the top reduced tubular structure 2. The moving table 4 of the elevator support frame 1 can slide on the foundation 3 in the radial direction of the top reduced tubular structure 2. The means for sliding the moving table 4 is not particularly limited, but it is preferable to use a moving jack 5. When the moving jack 5 is fixed on the foundation 3, the moving base 4 can be easily moved in the radial direction of the top reduced tubular structure 2 by matching the drive shaft with the radial direction of the top reduced cylindrical structure 2. Can be slid. A lower end of the holding table 6 is erected on the moving table 4. The holding table 6 holds a jack type elevator (not shown).

  As shown in FIG. 2, one end 8a (hereinafter referred to as a fixed end) of the connecting frame 8 is fixed to a beam 7a (hereinafter referred to as a fixed side beam) on one side of the holding table 6. Here, an example in which the fixed end 8a of the connecting frame 8 is fixed to the fixed side beam 7a of the holding base 6 by welding has been illustrated, but the means for fixing the fixed end 8a is not particularly limited. Conventionally known materials such as bolts and pins can be used. On the other hand, the other end 8b (hereinafter referred to as an adjustment end) of the connecting frame 8 is provided with a plurality of bolt mounting holes 9 for detachably mounting bolts.

  A bolt fixing hole 10 is provided in the beam 7b on the other side of the holding base 6 (hereinafter referred to as an adjustment side beam). The bolt fixing hole 10 of the adjustment side beam 7b corresponds to the bolt mounting hole 9 provided in the adjustment end 8b of the connecting frame 8, and the bolt 11 penetrating the bolt fixing hole 10 and the bolt mounting hole 9 is mounted. By fastening with a nut, the connecting frame 8 is fixed to the holding table 6 of the adjacent elevator support frame 1. Since the holding bases 6 of the elevator support bases 1 adjacent to each other are arranged at the same height from the foundation 3, the connecting frame 8 is fixed horizontally.

The bolt fixing hole may be provided not only on the adjustment side beam 7b of the holding base 6 but also on the fixed side beam 7a. In that case, the fixed side beam 7a of the holding base 6 and the fixed end 8a of the connecting frame 8 are fixed with bolts.
In this way, three sets of elevator support bases 1 are installed at equal intervals around the top reduced tubular structure 2, and the top part is moved by a step rod that can be raised and lowered by a jack type elevator on the holding base 6 of the elevator support base 1. The lower layer portion of the top reduced tubular structure 2 is disassembled and removed while the upper layer portion of the reduced tubular structure 2 is suspended and supported. Next, the jack type elevator is operated to lower the top reduced tubular structure 2 suspended by the step rod onto the foundation 3.

  At this time, the means for hanging down the upper layer portion of the top reduced tubular structure 2 is not particularly limited. As shown in FIG. 5, a hook 14 is attached to the lower end of the step rod 12 and the outer wall of the top reduced tubular structure 2 is attached. The hook 14 is inserted into the opening 16 provided in the upper part, and the upper layer part of the top reduced tubular structure 2 can be suspended and supported. In that case, it is preferable to prevent the hook 14 from spreading by moving the roller 17 up and down along a column (not shown).

  Alternatively, as disclosed in Patent Document 2, a ring beam (not shown) whose inner diameter can be changed is attached to the step rod 12, and a hanging tool is further provided on the ring beam, so that the top reduced cylindrical shape is provided. The upper layer portion of the structure 2 can also be suspended and supported. In FIG. 5, in order to clearly show the arrangement of the jack type elevator 15, the step rod 12, and the hook 14, the elevator support frame 1 is not shown.

The load of the suspended top reduced cylindrical structure 2 acts on the jack type elevator 15, and consequently a great load is applied to the elevator support base 1. Therefore, as described above, the elevator support bases 1 that are adjacent to each other are connected using the connecting frames 8 that are horizontally disposed, thereby preventing the elevator support bases 1 from being deformed or overturned during work.
Or if the anchor bolt 13 fixed to the foundation 3 is used together as shown in FIG. 3, the effect which prevents the deformation | transformation and fall of the elevator support stand 1 will improve. When the load acting on the elevator is relatively small, it is not always necessary to use the connecting frame 8, and it is also possible to prevent the elevator support frame 1 from being deformed or toppled by the anchor bolts 13 and to be independent.

In this way, the lower part of the top reduced tubular structure 2 is dismantled and further removed while hanging down and supporting the upper layer part of the top reduced tubular structure 2, and then the top reduced tubular structure is dropped. The top reduced tubular structure 2 can be disassembled from the lower layer by lowering 2 onto the foundation 3 and repeating the procedure of inserting the hook 14 into the upper opening 16.
And when disassembling the upper layer part of the top reduced tubular structure 2, since the outer diameter of the top reduced tubular structure 2 is small, the elevator support base 1 is reduced in the top part as shown in FIG. The cylindrical structure 2 is moved in the radial direction. The movement of the elevator support base 1 is preferably performed in a state where the top reduced cylindrical structure 2 is placed on the foundation 3 from the viewpoint of ensuring safety.

In order to move the elevator support frame 1, first, the bolt 11 fixed through the bolt fixing hole 10 and the bolt mounting hole 9 is removed. Further, when the anchor bolt 13 is used together, the anchor bolt 13 is also removed or loosened.
Next, by operating the moving jack 5 and sliding the moving table 4 in the radial direction of the top reduced cylindrical structure 2 on the foundation 3, the elevator support frame 1 is brought close to the top reduced cylindrical structure 2. To stop at a predetermined position. An iron plate is preferably laid on the upper surface of the foundation 3 in order to easily slide the movable table 4. Alternatively, measures such as connecting a beam-like structure to the side surface of the foundation 3 and laying an iron plate with the upper surface of the foundation 3 and the upper surface of the beam-like structure aligned at the same height may be taken. By using the beam-like structure in this manner, the movable table 4 can be slid in a wider range than the foundation 3, and the movable table 4 can be easily slid by placing an iron plate. Become.

After moving all three sets of elevator support bases 1 installed around the top reduced tubular structure 2, install bolt fixing holes 10 and bolts 11 penetrating the bolt mounting holes 9, and tighten with nuts again. Thus, the connecting frame 8 is fixed horizontally to the holding table 6 of the adjacent elevator support frame 1.
At this time, as shown in FIG. 4, the position at which the connecting frame 8 of the elevator support frame 1 and the holding table 6 of the adjacent elevator support frame 1 abut changes. Since the bolt mounting holes 9 are provided, the bolts 11 penetrating the bolt fixing holes 10 and the bolt mounting holes 9 of the adjustment side beam 7b of the holding base 6 can be mounted.

When the anchor bolt 13 is used together, the anchor bolt 13 is fixed to the foundation 3.
In this way, the jack type elevator 15 can be disposed on the concentric circle of the top reduced tubular structure 2 even when the upper layer part of the top reduced tubular structure 2 is disassembled. Therefore, the center of the circle drawn by the hooks 14 (three in total) attached to the lower end of the step rod 12 can be made to coincide with the center of the top reduced tubular structure 2. Or when attaching the ring beam which can change an internal diameter to the lower end of a step rod, the center of a ring beam can also be made to correspond with the center of the top reduced cylindrical structure 2. FIG.

  The above is the procedure for dismantling the top reduced tubular structure 2. When the elevator support frame 1 of the present invention is used for the construction of the top reduced tubular structure 2, the construction starts from the upper layer part of the top reduced tubular structure 2 (see FIG. 4), and the top reduced tubular structure While lowering and supporting 2, the lower layer is constructed (see FIG. 2). At that time, the elevator support base 1 is moved away from the top reduced cylindrical structure 2, but the operation of sliding the elevator support base 1 at a predetermined position and further fixing is performed in the above dismantling operation. Since it is the same as the case, the description is omitted.

When repairing the reduced top tubular structure, attach a jack type elevator to raise and lower the step rod to the elevator support base, and attach a work scaffold or loading platform to the step rod and move up and down Let
Here, an example in which three elevator support bases are installed around the top reduced cylindrical structure has been described, but if two or more elevator support bases are installed, construction, dismantling and repair of the top reduced cylindrical structure will be described. Work can be done.

  If only one elevator support base is installed, it is difficult to suspend and support the top reduced tubular structure during construction or dismantling work, so two or more elevator support bases are required. In order to hang down the top reduced cylindrical structure stably, it is preferable to install a large number of elevator support frames. However, if there are too many elevator support frames, the workable space on the foundation of the top reduced tubular structure is reduced, which hinders construction and dismantling work. Therefore, it is preferable that the number of elevator support frames to be installed is eight or less.

As described above, by using the elevator support frame of the present invention, construction, dismantling, and repair work are performed while adjusting the position of the elevator support frame according to the change in the outer diameter of the top reduced tubular structure. be able to.
Also in the construction, disassembly, and repair work of the enlarged top tubular structure, the position of the elevator support base can be adjusted according to the change in the outer diameter in the same manner as described above.

Here, an example of combining a jack-type elevator and a step rod in the construction, dismantling, and repair work of an expanding / contracting diameter cylindrical structure has been described. It is also possible to use a combination of elevators suitable for them.
For example, when using a screw rod, the nut can be moved up and down by rotating a nut screwed into the screw rod or rotating the screw rod. Therefore, if the hook, ring beam, and the like are moved up and down in conjunction with the nut, it is possible to perform construction, disassembly, and repair work of the expanded / reduced diameter cylindrical structure using the elevator support frame of the present invention. .

  When disassembling the top reduced cylindrical structure having an outer diameter of 6000 mm for the lower layer, an outer diameter of 4400 mm for the upper layer, and a height of 100 m, as shown in FIGS. Three sets of elevator support bases 1 were installed on the top at equal intervals. And the jack type elevator 15 was attached to the elevator support stand 1, respectively, and the top reduced tubular structure 2 was suspended and supported by the hook 14 attached to the lower end of the step rod 12, as shown in FIG. The height from the foundation 3 to the upper surface of the holding base 6 is 11.5 m, the outer diameter of the step rod 12 is 140 mm, and the jack type elevator 15 uses a 200 ton jack.

In this manner, the upper layer portion of the reduced top tubular structure 2 is suspended and supported, the lower layer portion of the reduced top tubular structure 2 is disassembled and removed, and then the jack type elevator 15 is operated to perform steps. The top reduced cylindrical structure 2 suspended by the rod 12 was lowered onto the foundation 3.
When this procedure is repeated, the top reduced tubular structure 2 is disassembled from the lower layer portion, and when the upper layer portion of the top reduced tubular structure 2 is disassembled, as shown in FIG. Was adjusted in the radial direction of the top reduced tubular structure 2 so that the distance between the top reduced tubular structure 2 and the hook 14 did not become too large.

  In this way, by using the elevator support base 1 of the present invention, the top reduced cylindrical structure 2 could be disassembled sequentially from the lower layer portion to the upper layer portion without collapsing or collapsing.

DESCRIPTION OF SYMBOLS 1 Elevator support stand 2 Top part reduction | decrease cylindrical structure 3 Foundation 4 Movement stand 5 Jack for movement 6 Holding stand
7a Fixed side beam
7b Adjusting side beam 8 Connecting frame
8a Fixed end
8b Adjustable end 9 Bolt mounting hole
10 Bolt fixing hole
11 volts
12 step rod
13 Anchor bolt
14 Hook
15 Jack type elevator
16 opening
17 Roller

Claims (2)

An elevator support frame for supporting an elevator used in the construction, dismantling and repairing of an enlarged / reduced diameter cylindrical structure, which slides on the base of the enlarged / reduced diameter cylindrical structure in the radial direction of the enlarged / reduced diameter cylindrical structure can or a slidable moving base and provided with beam-like structure Butsujo on the foundation, is standing on the moving table have a, a holding table for holding the elevator, fixing of the holder It has a connecting frame that is horizontally arranged with a fixed end fixed to the side beam and that has bolt mounting holes for removably mounting bolts on the adjusting end, and the adjusting end of the connecting frame has elevator support cradle for the bolt fixing holes, characterized in Rukoto provided on the adjustment side beam of the holder for passing the bolt to be mounted on the bolt mounting hole provided. The elevator support frame according to claim 1, further comprising a moving jack for moving the moving table in a radial direction of the expansion / contraction diameter cylindrical structure.

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