Tool for dismantling assembled columns and method for dismantling using the same

Abstract

To provide a disassembling tool and a disassembling method capable of easily attaching an assembled column to a fitting part and reliably separating an upper unit column body from a lower unit column body.SOLUTION: In a disassembling tool for an assembled column, a removal member 1 is divided into an upper magnetic fixture 5 and a lower removal body 6, which are rotatably pin-connected, a magnet 5a is provided on a surface abutting on a unit column of the magnetic fixture 5, and a locking claw 9 is provided on an inner lower end of the removal body 6; the removal body 6 of the removal member 1 and a non-slip member 2 are fixed to an upper or lower unit column B or C by a chain 3 having a tightening adjuster, and the upper and lower ends of a hydraulic jack 4 are pin-connected to the removal body 6 of the removal member 1 and the non-slip member 2.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] 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 the assembled columns from the site, and to a dismantling method using the dismantling tool. [Background technology]

[0002] Conventionally, a dismantling tool has been developed in which a number of movable pieces are fixed to the lower end of an upper unit column by tightening a tightening band around the outer periphery of a lower unit column at the fitting portion between an upper unit column and a lower unit column, a number of 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.

[0003] The device in Patent Document 1 follows the conventional device described above, but in that an auxiliary support is fixed under the jack support base, and the mating surface between the two is made inclined, the reaction force caused by the jack operation is received together with the jack support base, and the axial movement of the jack support base is restricted by a wedge action to prevent it from moving.

[0004] 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 an 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. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Patent No. 6440532 [Patent Document 2] Patent No. 5519420 DISCLOSURE OF THEINVENTION [Problem to be solved by the invention]

[0006] 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 with 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 will not move easily, and if it is not tight enough, the movable piece will move, but there is a risk that it will move over the bottom end of the upper unit column.

[0007] In addition, when the lower unit column of the fitting portion has a taper and the fastening band for attaching the movable block is located on the outer periphery of the taper or small diameter portion, the jack can be tilted and fixed, but this is done by turning the angle adjustment bolts on the movable block and the jack support base to push up the ram contact plate or the jack fixing device. Therefore, tilting the jack is time-consuming.

[0008] In addition, in the case of Patent Document 2, the fixed piece with its lower edge engaged is fixed to the lower end of the upper unit column 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 at the end of the fixed piece may come off the lower end.

[0009] Furthermore, as shown in Figure 13, the fixed point of the jack (so-called force point) on the fixed block is separated from the latch claw (so-called point of application) on the fixed block, so when the jack is operated to lift the fixed block, the principle of leverage (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.

[0010] The present invention focuses on the above-mentioned 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, and a dismantling method using said dismantling tool. [Means for solving the problem]

[0011] The invention of claim 1 has a lower end of the upper unit column, At the bottom In this dismantling tool for assembled columns, the tool comprises a removal member which engages and fixes the removal member, an anti-slip member which is fixed to a lower unit column body, and a jack which is provided between the removal member and the anti-slip member, and which extends the operating rod of the jack to push up the removal member and pull up the upper unit column body upward to dismantle it. The removal member is separated into an upper magnetic fixture and a lower removal body which are connected by pins so as to be freely rotatable. A magnet is provided on the surface of the magnetic fixture which abuts against the unit column body, and a locking claw is provided on the inside lower end of the removal body. The removal body and anti-slip member of the removal member are fixed to the upper or lower unit column body, respectively, by chains having tightening adjusters, and the upper and lower ends of the jack are connected by pins to the removal body and anti-slip member of the removal member, respectively.

[0012] 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 pin-connected to the lower end of the removal body of the removal member at a point close to the outer periphery of the upper unit column body, and 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 angle.

[0013] 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 magnet fixing device of the removal member and the pin of the pin connection of the removal main body pass is made into a long hole.

[0014] The invention of claim 4 is a tool for dismantling an assembled column described in any of claims 1 to 3, in which the removal body and anti-slip member of the removal member consist of a vertical plate having 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 side surfaces of the vertical rib.

[0015] The invention of claim 5 is a method for dismantling an assembled column, which uses a dismantling tool described in any of claims 1 to 4 to hook the engaging claws of the removal body of the removal part onto the lower edge of the upper unit column body, and attach the magnetic fixing device of the removal part to the outer periphery of the upper unit column body by magnetic attraction, and in this state, fixes the removal part to the outer periphery of the upper unit column body by a chain having a tightening adjuster, and connects the upper end of a jack to a pin to the removal body of the removal part, and also connects the anti-slip member to the lower end of the jack by a pin, fixes the anti-slip member to the outer periphery of the lower unit column body by a chain having a tightening adjuster, and pulls up the removal part with the jack. Effect of the Invention

[0016] According to the invention 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 hook of the detachable body to 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 that time, since the magnet fastener of the detachable member is separate from the detachable body, it is easy to move the detachable member with the magnet fastener attached to the unit column and attach the hook to the lower edge of the upper unit column, and therefore the detachable member can be accurately attached to the upper unit column.

[0017] In addition, because the removal member is divided into the magnet fixing tool and the removal main body and connected by pins in this way, 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 tool can be attached by being in close contact with the outer surface of the unit column body. Also, the above chain is fastened from above the removal main body, and the fastening force of the chain is not applied to the magnet fixing tool, so it does not affect the magnet.

[0018] In addition, if the removal member is fixed to the upper unit column body with a chain having a tightening adjuster, the jack can be hung from the removal member and the anti-slip member can be hung from the jack.The worker can then attach the anti-slip member to the outer periphery of the lower unit column body using both hands, and wrap the chain having the tightening adjuster around the outer periphery of the lower unit column body to secure it.

[0019] Therefore, unlike the conventional method, there is no need to measure in advance the position of the lower unit column to which the anti-slip member is attached. Also, since 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 upper and lower unit columns even if the outer diameters of the upper and lower unit columns are different.

[0020] In addition, 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 at an angle, so that when the force of the jack is applied, a moment that tries to bend the removal member is less likely to act, and the force caused by the action of the jack is directed toward the lower end of the upper unit column, allowing the force of the jack to be applied efficiently.

[0021] 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 main body is a long hole. Therefore, when the magnet fixing device is temporarily fixed to the upper unit column body, the removal main body has a greater degree of freedom of movement and the locking claw can be easily hooked onto the lower edge of the upper unit column body.

[0022] Furthermore, according to the invention of claim 4, the removal body and anti-slip member of the removal member consist of a vertical plate having a column 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 side surfaces 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. [Brief description of the drawings]

[0023] [Figure 1] FIG. 2 is a front view showing a state in which a dismantling tool for an assembled column according to the first embodiment of the present invention is attached to a fitting portion of the assembled column. [Diagram 2] FIG. 11 is a front view of the state in which the removal member of the dismantling tool for an assembly column in embodiment 1 of this 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. [Diagram 3] 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 portions of the assembly column, and the jack and anti-slip members are connected to these removal members. [Figure 4] 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 this 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. [Diagram 5] FIG. 2 is an explanatory diagram showing the action of a jack of a dismantling tool for an assembled column in the first embodiment of the present invention. [Figure 6] FIG. 2 is a front view of the assembly column dismantling tool of the first embodiment of the present invention with two anti-slip members. [Figure 7] 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, where (a) is a front view, (b) is a side view, (c) is a plan end view, and (d) is a bottom end view. [Figure 8] 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, where (a) is a plan view, (b) is a front view, (c) is a side view, and (d) is a cross-sectional view taken along line AA of (c). [Figure 9] 1A and 1B are diagrams of a chain with a tightening adjuster of a dismantling tool for an assembly column in accordance with a first embodiment of the present invention, in which FIG. [Figure 10] 1A and 1B are diagrams of a hydraulic jack for dismantling a column assembly in accordance with a first embodiment of the present invention, in which FIG. 1A is a side view and FIG. [Figure 11]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. [Figure 12] FIG. 11 is a front view showing a state in which a dismantling tool for an assembled column according to embodiment 2 of the present invention is attached to a fitting portion of the assembled column. [Figure 13] 1 is an explanatory diagram showing how a latching claw of a conventional dismantling tool tries to come off by the principle of leverage. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0024] (Embodiment Example 1) A dismantling tool A for a construction column 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.

[0025] First, a dismantling tool A for an assembled column will be described with reference to Fig. 7 to Fig. 10. This dismantling tool A is composed of a removal member 1, an anti-slip member 2, a chain 3 with a tightening adjuster, and a hydraulic jack 4.

[0026] 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 rotatable in the vertical direction. The magnet fixture 5 has a magnet 5a on the surface that abuts against the outer periphery of the column, and has a horizontal cross section of approximately It is made up of a dogleg-shaped vertical piece 5b, and has 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 substantially horizontally, penetrating 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, for example, to pass a wire through and suspend the magnet fixture 5 with the wire when there is a risk of it falling due to the magnetic attraction force of the magnet alone.

[0027] Similarly to the magnet fixing device 5, the removal body 6 is composed of a vertical piece 6b having a contact surface 6a with a dogleg-shaped horizontal cross section on the inner side thereof, which contacts 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 in 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 be freely rotatable by the bolt 7 and the long hole 6e.

[0028] The rib piece 6c is provided with a chain insertion hole 6f through which the tightening adjuster-equipped chain 4 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.

[0029] A locking claw 9 is provided horizontally at the lower end of the contact surface 6a of the vertical piece 6b. The locking claw 9 also has a dogleg-shaped horizontal cross section. The locking claw 9 is made of a material harder than the material of the combined post that dismantles the fitting portion.

[0030] 8, the anti-slip member 2 has a substantially U-shaped main body frame 2b, which is narrower than the vertical base 2a and longer in the horizontal direction, provided on the back surface of the flat vertical base 2a that has a U-shaped horizontal cross section. Chain insertion holes 2c, through which the tightening adjuster-equipped chain 3 passes, are provided on both sides of the main body frame 2b, and one end of the chain insertion hole 2c forms the back surface of the vertical base 2a.

[0031] Holes 2d and 2e are provided on both the upper and lower sides of the outer side of the main body frame 2b. A stopper plate 2f is provided on the upper back surface of the vertical pedestal 2a, 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 pedestal 2a at the upper part of the main body frame 2b, and a reinforcing member 2h is provided on the lower back surface of the vertical pedestal 2a, penetrating the lower part of the main body frame 2b.

[0032] 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.

[0033] One end of the chain 3a is engaged with the chain fixing bracket 3d, and by turning the nut 3e, the pipe-type connecting bracket 3b is pushed by the nut 3e and moves on the bolt 3c, thereby adjusting the length of the chain 3a.

[0034] 10, the hydraulic jack 4 is capped with a jack cap 10 on 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 positions of the plates 10a. The gap between the two plates 10a has a width that allows 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 to fit therebetween, and the holes 10b face the through holes 6h at the lower part of the rib piece 6c of the removal body 6.

[0035] A connecting piece 11 having a U-shaped cross section is protruded from the lower end of the hydraulic jack 4, and a through hole 11a is provided through both sides of the connecting piece 11. The thickness of the connecting piece 11 is large enough to enter the hollow portion of the main body frame 2b of the anti-slip member 2, and the through hole 11a faces the hole 2d of the main body frame 2a.

[0036] A method for dismantling the fitting portion between the upper unit column body B and the lower unit column body C of the assembled column using the dismantling tool A configured as described above will be described.

[0037] 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 fixture 5 is attracted to the outer periphery of the unit column B, and the removal body 6 is moved to hook the locking claws 9 onto the lower edge of the unit column B. Since the magnet fixture 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 claws 9. In this way, the two removal members 1 are temporarily fixed to the upper unit column B, as shown in Figure 2(a).

[0038] In this case, the removal member 1 is separated into the magnet fixing tool 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 that 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.

[0039] Then, using both hands, the worker passes the chain 3a of the chain 3 with the tightening adjuster 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, thereby 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.

[0040] Next, as shown in Fig. 3, the hydraulic jack 4 and the anti-slip member 2 are connected. The connecting piece 11 at the lower end of the hydraulic jack 4 is inserted into the main body 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 them. Then, as shown in Fig. 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 upper 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 them.

[0041] Thereafter, 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 3 with a tightening adjuster 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 metal fitting 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 3 with a tightening adjuster 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 3 with a tightening adjuster is wrapped around the outer periphery of the lower unit column C.

[0042] In this way, the dismantling tool A is fixed across the upper unit column B and the 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 circumferential surface of the lower unit column C, so that the hydraulic jack 4 is in an inclined state.

[0043] Then, operating rods (not shown) are respectively engaged with the two hydraulic jacks 4, and by moving the operating rods, the operating rods (not shown) of each hydraulic jack 4 extend and push each of the removal members 1 upward, thereby pushing up the upper unit column B, and unit column B and unit column C are dismantled.

[0044] At this time, as shown in FIG. 5, the upward pushing force of the hydraulic jack 4 acts as a component force consisting of a force pushing the removal member 1 upward and a force pressing the removal member 1 against the upper unit column B, 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.

[0045] In addition, 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 upper unit column B separates from the lower unit column C due to the force of the hydraulic jack 4.

[0046] In addition, the locking claw 9 provided at the lower end of the detachment body 6 of the detachment member 1 requires a certain plate thickness from the viewpoint of strength, and there are cases where 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) detachment member 15 (corresponding to the upper L-shaped member 4) in which the magnet fixing device 5 and the detachment body 6 are integrally constructed, when it is attached to the lower end of the upper unit column B having a thin plate thickness, the lower end of the detachment 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 upper part of the detachment member 15 contacts the outer surface of the unit column B at an angle, creating a gap and weakening the adhesion.

[0047] Furthermore, 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 locking claw 9 at the bottom of the removal member 16 is engaged with 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 plate thickness of the upper unit column B, and gaps are likely to occur.

[0048] 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 is adhered tightly to the unit column B and adsorbed thereto, so no gaps are generated.

[0049] Also, the magnet 5a of the magnet fixing device 5 may be a neodymium magnet, but in that case, it is known that while the magnetic force is strong, the strength is weak. If the magnet fixing device 5 and the removal body 6 are an integral structure of the removal member 1' as in the past, the magnet may be subjected to a load when it is tightly fastened with the chain 3a, and may 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.

[0050] In the above-mentioned first embodiment, two each of the removal members 1, anti-slip members 2, and hydraulic jacks 4 are prepared and attached to two locations on the left and right sides of the assembly pillar for dismantling, but as shown in the second embodiment in Fig. 12, one each of the removal members 1, anti-slip members 2, and hydraulic jacks 4 can be prepared and attached to one location on the assembly pillar and dismantled by operating the hydraulic jack 4. In this case, the same dismantling tool A as used in the above-mentioned first embodiment is used.

[0051] Alternatively, 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, may be prepared, the removal member 1 and the anti-slip member 2 may be attached to three locations on the outer periphery of the upper unit column body B and the lower unit column body C, and a chain 3 with a tightening adjuster may be wound around and fixed, and the upper unit column body B may be pulled up at three locations by the hydraulic jack 4. Thus, the removal member 1, anti-slip member 2, and hydraulic jack 4, which are components constituting the assembly column dismantling tool A of this invention, may be used in one or more pairs.

[0052] In the above-mentioned first embodiment, the magnet fixing device 5 of the removal member 1 and the removal body 6 are pin-connected with the 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-mentioned first embodiment, the hydraulic jack 4 is used, but it is not limited to a hydraulic jack, and any device having a jacking function may be used, whether electric or manual. [Explanation of symbols]

[0053] A Demolition tools B Upper unit column C Lower unit column 1 Removable part 2 Anti-slip part 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-type connecting fitting 3c Bolt 3d Chain fixing bracket 3e Nut 4 Hydraulic jack 5 Magnet fixture 5a Magnet 5b Vertical piece 5c Cover 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 Bolts 8 Nuts 9 Locking claw 10 Jack cap 10a Plate 10b Hole 11 Connecting piece 11a Through hole 12 pin 13 pin 14 Connecting hardware 15 Removable member of the conventional method (Patent Document 2) 15a Magnet 16 Integrated removal member 16a Magnet

Claims

1. 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.

2. 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 angle.

3. 3. The tool for dismantling an assembled column according to claim 1 or 2, wherein one of the holes through which the pin of the pin connection of the magnet fixing device of the detachment member and the detachment body penetrate is an elongated hole.

4. The tool for dismantling an assembly column according to any one of claims 1 to 3, characterized in that 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, 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 side surfaces of the vertical rib.

5. 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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