JP7628007B2 - Tool for dismantling assembled columns and method for dismantling using the same - Google Patents

Description

This invention relates to a dismantling tool used to dismantle and transport assembled columns, such as split composite columns, prefabricated steel pipe columns, and panzer masts, after removing the fittings when removing them from the site, and to a dismantling method using the dismantling tool.

Conventionally, a dismantling tool has been developed in which multiple movable pieces are fixed to the lower end of the upper unit column by tightening a tightening band around the outer periphery of the lower unit column at the fitting portion between the upper unit column and the lower unit column, multiple jack supports are fixed to the lower unit column below the movable pieces by tightening bands, a jack is fixed between each of these movable pieces and the jack supports, and the movable pieces are pushed up by the jack to pull off the upper short column of the fitting portion from the lower unit column.

The device in Patent Document 1 follows the conventional device described above, but it also fixes an auxiliary support under the jack support base, makes the mating surface between the two inclined, and receives the reaction force caused by the jack's operation together with the jack support base, and further restricts the axial movement of the jack support base by a wedge action to prevent it from moving.

In addition, in the device of Patent Document 2, instead of the conventional movable block described above, a fixed block that engages the lower edge of the upper unit column is fixed to the lower end of the upper unit column with a band, and a hydraulic jack is fixed between the fixed block and a jack support base fixed to the lower unit column. The fixed block is pushed up by extending the jack, and the upper unit column is pulled upward and dismantled.

Patent No. 6440532 Patent No. 5519420

In the device of Patent Document 1, the movable piece is fixed to the outer periphery of the lower unit column with a tightening band while being pushed up by a jack, so the degree to which the tightening band tightens the movable piece to the lower unit column is delicate; if the tightening band is too tight, the movable piece does not move easily, and if it is not tight enough, the movable piece moves, but there is a risk that it will move over the bottom end of the upper unit column.

In addition, if the unit column below the fitting section has a taper, and the tightening band that attaches the movable block is located on the outer periphery of the tapered section or small diameter section, the jack can be tilted and fixed, but this is done by turning the angle adjustment bolts on the movable block and jack support base to push up the ram abutment plate or jack fixing device. Therefore, tilting the jack is time-consuming.

In addition, in the case of Patent Document 2, a fixed piece with its lower edge engaged is fixed to the lower end of the upper unit column body by a band, so there is no need to adjust the fixation and movement of the movable piece as in Patent Document 1. However, because the pushing force of the jack acts in the axial direction of the assembly column, there is a risk that the latching claw that engages the lower edge of the upper unit column body at the end of the fixed piece may come off the lower end.

Furthermore, as shown in Figure 13, the fixed point of the jack (the so-called force point) on the fixed block is separated from the latch claw (the so-called point of action) on the fixed block. Therefore, when the jack is operated to lift the fixed block, the principle of leverage (the so-called moment) comes into play, causing the latch claw to come off the lower edge of the upper unit column. For this reason, the band that secures the fixed block is made strong and heavy to prevent the latch claw from coming off.

This invention focuses on the above points and aims to provide a dismantling tool that can be easily attached to the fitting portion of an assembly column and can reliably separate an upper unit column body from a lower unit column body, as well as a dismantling method using said dismantling tool.

The invention of claim 1 is a dismantling tool for assembled columns, comprising a removal member which is engaged and fixed to the lower end of an upper unit column, an anti-slip member which is fixed to a lower unit column, and a jack provided between the removal member and the anti-slip member, and which pushes up the removal member by extending the operating rod of the jack to pull the upper unit column upward and dismantle it, the removal member being divided into an upper magnet fixing device and a lower removal body which are connected by a pin so as to be freely rotatable, a magnet is provided on the surface of the magnet fixing device which abuts against the unit column, a locking claw is provided on the inner lower end of the removal body, the removal body and the anti-slip member of the removal member are fixed to the upper or lower unit column by a chain having a tightening adjuster, and the upper and lower ends of the jack are connected by pins to the removal body of the removal member and the anti-slip member, respectively.

The invention of claim 2 is a tool for dismantling an assembled column as described in claim 1, in which the upper end of the jack is rotatably connected to the lower end of the removal body of the removal member at a location close to the outer periphery of the upper unit column body, and the lower end of the jack is connected to the outside of the anti-slip member away from the outer periphery of the lower unit column body, and the jack is connected at an angle.

The invention of claim 3 is a tool for dismantling an assembled column as described in claim 1 or 2, in which one of the holes through which the pin of the pin connection of the pin fixing device of the removal member and the pin of the pin connection of the removal body pass is an elongated hole.

The invention of claim 4 is a tool for dismantling an assembled column according to any one of claims 1 to 3, in which the removal body of the removal member and the anti-slip member are made of a vertical plate with a column body abutment surface on the inside, a vertical rib protrudes from the outside of the vertical plate at a right angle to the vertical plate, and a chain insertion hole is provided that penetrates both sides of the vertical rib.

The invention of claim 5 is a method for dismantling an assembled column, using a dismantling tool according to any one of claims 1 to 4, to hook the locking claws of the removal body of the removal member onto the lower edge of the upper unit column body, attach the magnetic fixture of the removal member to the outer periphery of the upper unit column body by magnetic attraction, fix the removal member to the outer periphery of the upper unit column body in this state with a chain having a tightening adjuster, connect the upper end of a jack to the removal body of the removal member with a pin, connect the anti-slip member to the lower end of the jack with a pin, fix the anti-slip member to the outer periphery of the lower unit column body with a chain having a tightening adjuster, and pull up the removal member with the jack.

According to the inventions of claims 1 and 5, the detachable body of the detachable member can be magnetically attached to the upper unit column by hooking the lower end locking claw onto the lower edge of the upper unit column, and then the detachable member can be fixed to the upper unit column by a chain having a tightening adjuster. At this time, since the magnet locking device of the detachable member is separate from the detachable body, it is easy to move the detachable member with the magnet locking device attached to the unit column and attach the locking claw to the lower edge of the upper unit column, and therefore the detachable member can be accurately attached to the upper unit column.

In addition, because the removal member is divided into the magnet fixing device and the removal body and connected by pins, even if the plate thickness of the unit column body of the assembled column is thinner than the plate thickness of the locking claw, the magnet of the magnet fixing device can be attached by being in close contact with the outer surface of the unit column body. Also, the above chain is tightened from above the removal body, and the tightening force of the chain is not applied to the magnet fixing device, so it does not affect the magnet.

In addition, if the removal member is fixed to the upper unit column body by a chain with a tightening adjuster, the jack can be hung from the removal member and the anti-slip member can be hung from the jack, and then the worker can attach the anti-slip member to the outer periphery of the lower unit column body using both hands and wrap the chain with the tightening adjuster around the outer periphery of the lower unit column body to secure it.

Therefore, unlike conventional methods, there is no need to measure in advance the position of the lower unit column to which the anti-slip member is attached. Also, because the upper and lower ends of the jack are connected to the removal member and the anti-slip member by pin connections, respectively, these members can be easily and reliably connected to the respective unit columns even if the outer diameters of the upper and lower unit columns are different.

Furthermore, according to the invention of claim 2, the upper end of the jack is connected near the locking claw of the removal member, and the jack is attached in an inclined state, so that when the force of the jack is applied, a moment that tends to bend the removal member is unlikely to act, and the force caused by the action of the jack is directed toward the lower end of the upper unit column body, allowing the force of the jack to be applied efficiently.

Furthermore, according to the invention of claim 3, the pin hole for the pin connection between the magnet fixing device of the removal member and the removal body is an elongated hole, so when the magnet fixing device is temporarily fixed to the upper unit column body, the degree of freedom of movement of the removal body increases, and it is easy to hook the locking claw onto the lower edge of the upper unit column body.

Furthermore, according to the invention of claim 4, the removal body and anti-slip member of the removal member are composed of a vertical plate having a column abutment surface on the inside, and a vertical rib is protruded from the outside of the vertical plate at a right angle to the vertical plate, and a chain insertion hole is provided that penetrates both sides of the vertical rib, so that the removal member and anti-slip member can be stably, easily and reliably fixed to the upper or lower unit column by a chain having the tightening adjuster.

FIG. 2 is a front view showing the state in which a dismantling tool for an assembly column of the first embodiment of the present invention is attached to the fitting portion of the assembly column. FIG. 1 is a front view of the state in which the removal member of the dismantling tool for an assembly column in embodiment 1 of the present invention is attached to the fitting portion of the assembly column, (a) showing the removal member attached to the fitting portion, and (b) showing the removal member fixed with a chain with a tightening adjuster. This is a front view of the state in which the removal members of the dismantling tool for the assembly column in embodiment 1 of the present invention are attached to the fitting portion of the assembly column, and a jack and an anti-slip member are connected to these removal members. This is a front view of the state in which the removal members of the dismantling tool for the assembly column of embodiment 1 of the present invention are attached to the fitting portion of the assembly column, and a jack and an anti-slip member are connected to these removal members. FIG. 10 is an explanatory diagram showing the operation of a jack of a dismantling tool for an assembly column in the first embodiment of the present invention. This is a front view of the assembly column dismantling tool of the embodiment 1 of the present invention, with two anti-slip members. 1A to 1D are diagrams of the removal members of the dismantling tool for the assembly column of the first embodiment of the present invention, in which (a) is a front view, (b) is a side view, (c) is a plan end view, and (d) is a bottom end view. 1A to 1D are diagrams of the anti-slip member of a dismantling tool for an assembly column in accordance with a first embodiment of the present invention, in which (a) is a plan view, (b) is a front view, (c) is a side view, and (d) is a cross-sectional view taken along the line A-A in (c). 1A and 1B are diagrams showing a chain with a tightening adjuster of a dismantling tool for an assembly column according to a first embodiment of the present invention, in which FIG. 1A and 1B are diagrams of a hydraulic jack for dismantling a column assembly according to a first embodiment of the present invention, in which FIG. 1A is a side view and FIG. FIG. 1 is an explanatory diagram showing the difference between a dismantling tool for an assembly column according to a first embodiment of the present invention and a conventional tool, in which (a) is a front view showing the attached state of the conventional removal member of Patent Document 2, (b) is a front view showing the attached state of the removal member of the present invention as an integrated unit, and (c) is a front view showing the attached state of the removal member of the present invention. 1 is a front view showing a state in which a dismantling tool for an assembly column of embodiment 2 of the present invention is attached to a fitting portion of the assembly column. FIG. 1 is an explanatory diagram showing how a latching claw of a conventional dismantling tool tries to come off by the principle of leverage.

(Embodiment Example 1)
A dismantling tool A for a column assembly according to the first embodiment of the present invention and a dismantling method using the dismantling tool A will be described with reference to Figs. 1 to 10.

First, the dismantling tool A for the assembled column will be explained with reference to Figures 7 to 10. This dismantling tool A is composed of a removal member 1, an anti-slip member 2, a chain with a tightening adjuster 3, and a hydraulic jack 4.

As shown in Fig. 7, the removal member 1 is divided into a magnet fixture 5 and a removal body 6, which are pin-connected to each other by a bolt 7 so as to be freely rotatable in the vertical direction. The magnet fixture 5 is made up of a vertical piece 5b with a generally L-shaped horizontal cross section, which has a magnet 5a on the surface that abuts against the outer periphery of the column, and a cover body 5c with a U-shaped horizontal cross section, with the edges of both pieces fixed to the outer surface of the vertical piece 5b. The bolt 7 is provided generally horizontally through the lower hollow part of the cover body 5c, and a nut 8 is screwed to the end of the bolt 7 protruding from the cover body 5c. Holes 5d are provided on both sides of the upper part of the cover body 5c. The holes 5d are provided as spare holes, and are intended to pass a wire through which the magnet fixture 5 can be hung when there is a risk of it falling off due to the magnetic attraction force of the magnet alone.

The removal body 6, like the magnet fixing device 5, is made up of a vertical piece 6b with a horizontal cross-sectional dogleg-shaped abutment surface 6a on its inner side that abuts against the outer periphery of the column. A vertical rib piece 6c protrudes from the outer surface of the vertical piece 6b. A tongue piece 6d protrudes from the upper end of the rib piece 6c, and a horizontal long hole 6e is provided in the tongue piece 6d. The tongue piece 6d enters the hollow part of the cover body 5d of the magnet fixing device 5, and the bolt 7 is passed through the long hole 6e inside the hollow part. The long hole 6e has a width greater than the diameter of the bolt 7. The magnet fixing device 5 and the removal body 6 are connected by a pin to freely rotate with the bolt 7 and the long hole 6e.

The rib piece 6c is provided with a chain insertion hole 6f through which the chain 4 with the tightening adjuster passes, and one end of the chain insertion hole 6f is in contact with the vertical piece 6b. Pedestal-shaped spacers 6g are provided on both sides of the rib piece 6c below the chain insertion hole 6f, and through holes 6h are provided that pass through the spacers 6g and the rib piece 6c on both sides.

Furthermore, a locking claw 9 is provided in the horizontal direction at the lower end of the abutment surface 6a of the vertical piece 6b. This locking claw 9 also has a dogleg-shaped horizontal cross section. This locking claw 9 is made of a material that is harder than the material of the assembly column that dismantles the fitting portion.

As shown in Figure 8, the anti-slip member 2 has a main frame 2b that is narrower than the vertical base 2a and elongated in the horizontal direction, and is provided on the back of the vertical base 2a, which is flat and U-shaped in horizontal cross section. Chain insertion holes 2c through which the tightening adjuster-equipped chain 3 passes are provided on both sides of the main frame 2b, and one end of the chain insertion hole 2c forms the back of the vertical base 2a.

Hole 2d and hole 2e are provided on both the top and bottom of the outside of the main body frame 2b. A stopper plate 2f is provided on the upper back surface of the vertical base 2a, which is spaced apart from the upper edge of the main body frame 2b. An intrusion prevention plate 2g is provided on the back surface of the vertical base 2a at the top of the main body frame 2b, and a reinforcing member 2h is provided on the lower back surface of the vertical base 2a, penetrating the lower part of the main body frame 2b.

As shown in FIG. 9, the chain 3 with tightening adjuster has a pipe-shaped connecting fitting 3b at one end of the chain 3a, and a chain fixing fitting 3d that engages one end of the chain 3a is provided at the end of a bolt 3c that covers the outer periphery of the pipe-shaped connecting fitting 3b, and is composed of a nut 3e screwed onto the bolt 3c of the chain fixing fitting 3d.

One end of the chain 3a is attached to the chain fixing bracket 3d, and by turning the nut 3e, the pipe-shaped connecting bracket 3b is pushed by the nut 3e and moves on the bolt 3c, adjusting the length of the chain 3a.

As shown in FIG. 10, the hydraulic jack 4 is capped with a jack cap 10 at its upper end. Two plates 10a are erected at the upper end of the jack cap 10 with a gap between them, and holes 10b are provided at opposing locations of the plates 10a. The gap between the two plates 10a is wide enough to accommodate the spacers 6g on both sides of the lower part of the rib piece 6c of the removal body 6 of the removal member 1, and the holes 10b face the through holes 6h at the lower part of the rib piece 6c of the removal body 6.

The hydraulic jack 4 also has a U-shaped connecting piece 11 protruding from its lower end, and the connecting piece 11 has a through hole 11a that penetrates both sides. The connecting piece 11 is thick enough to fit into the hollow part of the main frame 2b of the anti-slip member 2, and the through hole 11a faces the hole 2d of the main frame 2a.

We will now explain how to dismantle the fitting between the upper unit column body B and the lower unit column body C of an assembly column using dismantling tool A configured as described above.

First, as shown in Figure 2, the removal member 1 is fixed to the upper unit column B. To do this, the magnet 5a of the magnet fixing device 5 is attracted to the outer periphery of the unit column B while the removal body 6 is moved to hook the locking claw 9 onto the lower edge of the unit column B. Since the magnet fixing device 5 is attracted to the unit column B, the removal body 6 will not fall even if it is shifted on the unit column B, making it easy to hook the locking claw 9. In this way, the two removal members 1 are each temporarily fixed to the upper unit column B as shown in Figure 2(a).

In addition, in this case, the removal member 1 is divided into the magnet fixing device 5 and the removal body 6, which are connected to each other by a pin, and further, the pin (bolt 7) is loosely inserted into the long hole 6e, so the locking claw 9 of the removal body 6 can be locked to the lower edge of the upper unit column B, and then the magnet 5a of the magnet fixing bracket 5 can be attracted to the unit column B to attach the removal member 1. Either method of attaching the removal member 1 to the unit column B is acceptable.

Then, using both hands, the worker passes the chain 3a of the tightening adjuster-equipped chain 3 through the chain insertion hole 6f of each removal member 1, hooks one end of the chain 3a onto the chain fixing bracket 3d, and tightens the nut 3e, tightening the chain 3a. As shown in Figure 2(b), each removal member 1 is fixed to the lower end of the outer periphery of the unit column B.

Next, as shown in Figure 3, the hydraulic jack 4 and the anti-slip member 2 are connected. The connecting piece 11 at the bottom end of the hydraulic jack 4 is inserted into the main frame 2b of the anti-slip member 2, and the hole 2d and the through hole 11a are aligned and the pin 12 is passed through these holes to connect. Then, as shown in Figure 4, the spacers 6g on both sides of the rib piece 6c of the removable body 6 are sandwiched between the two plates 10a of the jack cap 10 at the top end of the hydraulic jack 4, and the through hole 6h and each hole 10b of each plate 10a are aligned, and the pin 13 is passed through these holes to connect.

Then, the vertical base 2a of each anti-slip member 2 is abutted against the outer periphery of the lower unit column C, the chain 3a of the chain with tightening adjuster 3 is passed through the chain insertion hole 2c of each anti-slip member 2, one end of the chain 3a is hooked onto the chain fixing bracket 3d, and the nut 3e is tightened to tighten the chain 3a, and as shown in Figure 1, each anti-slip member 2 is fixed to the outer periphery of the lower unit column C. Also, if necessary, the chain 3a of the chain with tightening adjuster 3 is passed around the back of the vertical base 2a between the bottom of the stopper plate 2f of each anti-slip member and the main frame 2b, and the chain with tightening adjuster 3 is wrapped around the outer periphery of the lower unit column C.

In this way, dismantling tool A is fixed across upper unit column B and lower unit column C. In this state, the jack cap 10 at the upper end of the hydraulic jack 4 is located immediately beside the locking claw 9 at the lower end of the removal body 6 of the removal member 1, and the connecting piece 11 at the lower end of the hydraulic jack 4 is located at the outer end of the main body frame 2b of the anti-slip member 2, away from the outer periphery of the lower unit column C, so that the hydraulic jack 4 is in an inclined state.

Then, operating rods (not shown) are respectively engaged with the two hydraulic jacks 4, and by moving each operating rod, the operating rod (not shown) of each hydraulic jack 4 extends and pushes each of the removal members 1 upward, which pushes up the upper unit column B, and unit column B and unit column C are dismantled.

At this time, as shown in FIG. 5, the force of the hydraulic jack 4 pushing the removal member 1 upward and the force pressing the removal member 1 against the upper unit column B act as a component force, so that the locking claws 9 of the removal member 1 do not come off the lower edge of the unit column B, and the unit column B is reliably pulled up by the force of the hydraulic jack 4.

Also, if the upper unit column B is firmly fitted to the lower unit column C and one anti-slip member 2 is not strong enough to receive the reaction force of the hydraulic jack 4, two anti-slip members 2 are provided and connected with a connecting metal fitting 14 as shown in Figure 6. This increases the reaction force, and the force of the hydraulic jack 4 moves the upper unit column B away from the lower unit column C.

In addition, the locking claw 9 provided at the lower end of the removal body 6 of the removal member 1 requires a certain thickness for strength, but in some cases the plate thickness of the assembly column, such as a panzer mast, is thinner than the plate thickness of the locking claw 9. Furthermore, even if it is thin, the plate thickness size is not uniform. As shown in FIG. 11(a), in the conventional (Patent Document 2) removal member 15 (corresponding to the upper L-shaped member 4) in which the magnet fixing device 5 and the removal body 6 are integrally constructed, when it is attached to the lower end of the upper unit column B with a thin plate thickness, the lower end of the removal member 15 having the locking claw 9 floats up from the outer surface of the unit column B, and the magnetic surface of the magnet 15a at the top of the removal member 15 contacts the outer surface of the unit column B at an angle, creating a gap and weakening the adhesion.

Also, as shown in Figure 11(b), in the case of an integrated type in which the magnet 16a protrudes from the upper part of the surface of the removal member 16 that abuts against the upper unit column B, if the lower locking claw 9 of the removal member 16 is attached by locking it to the lower edge of the upper unit column B, it is difficult to bring the magnet surface into close contact with the outer surface of the upper unit column B, regardless of the thickness of the upper unit column B, and gaps are likely to occur.

Therefore, by dividing the magnet fixing device 5 and the detachable body 6 and joining them with a pin, even if the detachable body 6 is slightly tilted, as shown in Figure 11 (c), the magnet fixing device 5 does not become tilted and adheres closely to the unit column B, so no gaps are created.

In addition, the magnet 5a of the magnet fixing device 5 may be a neodymium magnet, which is known to have a strong magnetic force but a weak strength. If the magnet fixing device 5 and the removal body 6 were an integrated structure in the removal member 1' as in the past, the magnet would be subjected to a load when tightly fastened with the chain 3a, which could cause it to crack. For this reason, the magnet fixing device 5 and the removal body 6 are separated to prevent the magnet from cracking due to the fastening force of the chain 3a.

In addition, in the above embodiment 1, two each of the removal member 1, anti-slip member 2, and hydraulic jack 4 are prepared and attached to two locations on the left and right sides of the assembly column for dismantling, but as shown in embodiment 2 of Figure 12, it is also possible to prepare one each of the removal member 1, anti-slip member 2, and hydraulic jack 4, attach them to one location on the assembly column, and dismantle by operating the hydraulic jack 4. In this case, the same dismantling tool A used in the above embodiment 1 is used.

In addition, three pairs of the components constituting the assembly column dismantling tool A of this invention, such as the removal member 1, anti-slip member 2, and hydraulic jack 4, can be prepared, and the removal member 1 and anti-slip member 2 can be attached to three locations on the outer periphery of the upper unit column body B and the lower unit column body C, respectively, and a chain 3 with a tightening adjuster can be wound around and fixed, and the upper unit column body B can be pulled up at three locations by the hydraulic jack 4. Therefore, the removal member 1, anti-slip member 2, and hydraulic jack 4, which are the components constituting the assembly column dismantling tool A of this invention, can be used in one or multiple pairs.

In the above embodiment 1, the magnet fixing device 5 of the removal member 1 and the removal body 6 are pin-connected with a bolt 7, and the bolt 7 is loosely inserted into the long hole 6e of the tongue piece 6d of the removal body 6, but the long hole 6e is not an essential requirement. Any hole through which the bolt 7 can be passed will do. Also, in the above embodiment 1, the hydraulic jack 4 is used, but it is not limited to a hydraulic jack, and any device that has a jacking function can be electric or manual.

A Dismantling tool B Upper unit column C Lower unit column 1 Removal member 2 Anti-slip member 2a Vertical base 2b Main frame 2c Chain insertion hole 2d Hole 2e Hole 2f Stopper plate 2g Intrusion prevention plate 2h Reinforcement member 3 Chain with tightening adjuster 3a Chain 3b Pipe-shaped connecting metal fitting 3c Bolt 3d Chain fixing metal fitting 3e Nut 4 Hydraulic jack 5 Magnet fixing device 5a Magnet 5b Vertical piece 5c Cover body 5d Hole 6 Removal body 6a Contact surface 6b Vertical piece 6c Rib piece 6d Tongue piece 6e Long hole 6f Chain insertion hole 6g Spacer 7 Bolt 8 Nut 9 Locking claw 10 Jack cap 10a Plate body 10b Hole 11 Connecting piece 11a Through hole 12 Pin 13 Pin 14 Connecting metal fitting 15: Conventional (Patent Document 2) detachment member 15a: Magnet 16: Integrated detachment member 16a: Magnet

Claims (5)

A dismantling tool comprising a removal member that is engaged and fixed to the lower end of an upper unit column, a non-slip member that is fixed to a lower unit column, and a jack provided between the removal member and the non-slip member, and which extends the operating rod of the jack to push up the removal member and pull up the upper unit column upward for dismantling,
The removal member is divided into an upper magnet fixture and a lower removal body, which are connected by a pin so as to be freely rotatable. A magnet is provided on the surface of the magnet fixture that contacts the unit column body, and a locking claw is provided on the inner lower end of the removal body.
The removal body and the anti-slip member of the removal member are fixed to the upper or lower unit column by a chain having a tightening adjuster,
The jack has upper and lower ends connected to the removal body of the removal member and the anti-slip member by pins, respectively. The upper end of the jack is rotatably connected to the lower end of the removal body of the removal member at a location close to the outer periphery of the upper unit column body by a pin;
The tool for dismantling a column assembly according to claim 1, characterized in that the lower end of the jack is pin-connected to the outside of the anti-slip member away from the outer periphery of the lower unit column body, and the jack is connected at an incline. The dismantling tool for an assembled column according to claim 1 or 2, in which one of the holes through which the pin of the pin connection of the magnet fixing device of the removal member and the pin of the removal body penetrates is an elongated hole. The tool for dismantling an assembled column according to any one of claims 1 to 3, characterized in that the removal body of the removal member and the anti-slip member are made of a vertical plate having a column body abutment surface on the inside, a vertical rib protruding from the outside of the vertical plate at a right angle to the vertical plate, and a chain insertion hole penetrating both sides of the vertical rib. Using the dismantling tool according to any one of claims 1 to 4, the engaging claw of the detachment body of the detachment member is hooked onto the lower end edge of the upper unit column body, and the magnetic fixture of the detachment member is attached to the outer periphery of the upper unit column body by magnetic attraction, and in this state, the detachment member is fixed to the outer periphery of the upper unit column body by a chain having a tightening adjuster;
The upper end of the jack is connected to the removal body of the removal member by a pin, and the anti-slip member is connected to the lower end of the jack by a pin, and the anti-slip member is fixed to the outer periphery of the lower unit column body by a chain having a tightening adjuster;
A method for dismantling an assembled column, comprising: lifting up the removal member with the jack.

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