How to build and dismantle structures

Abstract

To provide a crane lifting system capable of smoothly lifting and lowering a crane installation floor on which a crane is installed along a permanent column.SOLUTION: A building construction system 2 raises and lowers a crane 21 along a permanent column 11. The building construction system 2 includes a support column 11A which is a permanent column, a crane installation floor 20 that supports the crane 21, a horizontal-displacement suppressing device 25 that suppresses horizontal displacement of the crane installation floor 20 with respect to the side surface 16 of the support column 11A, a reaction member 41 installed on the top of the support column 11A, and a strand jack 43 that is attached to the reaction member 41 and raises and lowers the crane installation floor 20. The horizontal-displacement suppressing device 25 is provided with a support part 90 provided on the crane installation floor 20, a caster 91 provided on the support part 90 so as to be able to project and retract, and a coil spring 92 provided on the support part 90 to bias the caster 91 against the side surface 16 of the support column 11A.SELECTED DRAWING: Figure 12

Description

[Technical field]

[0001] The present invention relates to a crane hoisting system that raises and lowers a crane along a permanent column, a method for constructing a structure using this crane hoisting system, and a method for dismantling a structure using this crane hoisting system. [Background technology]

[0002] Conventionally, existing buildings have been demolished due to deterioration of their facilities and structures. There are the following methods for demolishing these existing buildings: For example, Patent Documents 1 to 3 disclose a demolition system for dismantling an existing structure. The demolition system includes a crane installation floor on which a crane is installed, a support column that supports the crane installation floor, and a lifting device that lowers the crane installation floor along the support column. In this demolition system, the lifting device is driven to lower the crane installation floor. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent No. 6508958 [Patent Document 2] Patent No. 6124444 [Patent Document 3] Patent No. 6474151 Summary of the Invention [Problem to be solved by the invention]

[0004] The present invention enables the crane installation floor on which the crane is installed to be smoothly raised and lowered along the permanent column. Well, The objective of the present invention is to provide a method for constructing a structure and a method for dismantling a structure. [Means for solving the problem]

[0005] A crane hoisting system (e.g., building construction system 2 and building demolition system 4 described later) of a first invention is a crane hoisting system that raises and lowers a crane (e.g., crane 21 described later) along a permanent column (e.g., column 11 described later), and includes a support column (e.g., support column 11A described later) that is a permanent column, a crane installation floor (e.g., crane installation floor 20 described later) that supports the crane, and a horizontal displacement suppression device (e.g., horizontal displacement suppression device 2 described later) that is provided on the crane installation floor and suppresses horizontal displacement of the crane installation floor relative to a side surface (e.g., side surface 16 described later) of the support column. 5), a reaction member (e.g., reaction member 41 described later) provided on the upper end side of the support pillar, and a lifting jack (e.g., strand jack 43 described later) attached to the reaction member for raising and lowering the crane installation floor, and the horizontal displacement suppression device comprises a support part (e.g., support part 90 described later) provided on the crane installation floor, a caster (e.g., caster 91 described later) provided to be capable of projecting and retracting into the support part, and a spring (e.g., coil spring 92 described later) provided on the support part for urging the caster against the side of the support pillar.

[0006] According to this invention, when the crane installation floor is raised and lowered along the support column, the horizontal displacement suppression device moves the casters while abutting against the side of the support column with the biasing force of the spring, so that the crane installation floor can be suppressed from being significantly displaced in the horizontal direction relative to the support column. Also, because the casters run along the side of the support column, the crane installation floor can be raised and lowered smoothly along the support column. This improves the workability of construction and demolition work using a crane.

[0007] The method for constructing a structure of the second invention is a method for constructing a structure (e.g., building 1 described later) using the above-mentioned crane hoisting system, in which the reaction member comprises a pair of locking portions (e.g., locking portion 60 described later) that lock onto the sides of the support column, a connecting beam (e.g., connecting beam 61 described later) that is arranged across the support column and connects the pair of locking portions, and a beam moving jack (e.g., beam moving jack 62 described later) that is provided on the locking portion and horizontally moves the connecting beam, and the method includes a first step (e.g., step S1 described later) of attaching a reaction member to an upper end of the support column and temporarily supporting the crane installation floor on the support column, a second step (e.g., step S2 described later) of constructing the structure for a predetermined floor using the crane, and a second step (e.g., step S3 described later) of driving the beam moving jack to move the connecting beam horizontally. The method includes a third step (e.g., steps S3 and S4 described below) of moving the beam away from directly above the support column, and in this state, attaching a column member to the top of the support column and extending it upward, then lifting the reaction member and moving it upward, and driving the beam moving jack to reconnect the pair of engaging portions with the connecting beam, a fourth step (e.g., steps S5 to S7 described below) of releasing the temporary support of the crane installation floor by the support column, and while suppressing the horizontal displacement of the crane installation floor relative to the side of the support column by the horizontal displacement suppression device, raising the crane installation floor along the support column by the lifting jack, so that the crane installation floor is temporarily supported on the support column again, and a fifth step (e.g., step S8 described below) of repeating steps 2 to 4.

[0008] According to this invention, a pair of locking parts of the reaction member are locked to the side surfaces of the support column, and the pair of locking parts are connected to each other by a connecting beam, so that the locking parts and the connecting beam form a gate-shaped frame and the rigidity of the reaction member can be ensured. In this state, the connecting beam is positioned across the support column. After that, when the beam moving jack is driven to move the connecting beam horizontally, the connection between the pair of locking parts is released, and the connecting beam is retracted from directly above the support column. Therefore, there is no need to remove the reaction member from the support column when constructing or dismantling a building, and the reaction member can be moved upward even if reinforcing bars protrude from the top surface of the support column, allowing construction to be completed in a short period of time. According to the present invention, a crane installation floor is constructed with a crane installed on it by temporarily supporting a permanent column of a structure on the support column, and the crane installation floor is raised along the support column while the structure is being constructed by the crane. At this time, the horizontal displacement suppression device suppresses the horizontal displacement of the crane installation floor, so that the crane installation floor can be raised smoothly along the support column. Specifically, the following steps are repeated in sequence: temporary support of the crane installation floor by the support pillar, extension of the support pillar, repositioning of the reaction member upward, and raising of the crane installation floor by the lifting jack. At this time, the beam moving jack is driven to move the connecting beam away from directly above the support pillar, and a member is attached to the top of the support pillar and extended upward, after which the reaction member is lifted and repositioned upward, and the beam moving jack is driven to connect the pair of locking parts together again by the connecting beam. By repeating this process, the support pillar can be constructed and extended upward while the reaction member is successively repositioned upward.

[0009] A method for dismantling a structure according to a third aspect of the present invention is a method for dismantling a structure using the crane lifting system described above, wherein the reaction member comprises a pair of locking portions (e.g., locking portion 60 described below) that lock onto the sides of the support column, a connecting beam (e.g., connecting beam 61 described below) that is arranged across the support column and connects the pair of locking portions, and a beam moving jack (e.g., beam moving jack 62 described below) that is provided on the locking portion and horizontally moves the connecting beam, and the method includes a first step (e.g., step S11 described below) of attaching a reaction member to an upper end of the support column and temporarily supporting the crane installation floor on the support column, a second step (e.g., step S12 described below) of using the crane to dismantle the structure into predetermined floors, and a third step (e.g., step S13 described below) of releasing the temporary support of the crane installation floor by the support column. a third step (e.g., steps S13 to S15 described later) of removing the connecting beam from the support column, lowering the crane installation floor along the support column by the lifting jack while suppressing horizontal displacement of the crane installation floor relative to the side surface of the support column by the horizontal displacement suppression device, and then temporarily supporting the crane installation floor on the support column again; a fourth step (e.g., steps S16 and S17 described later) of driving the beam moving jack to move the connecting beam away from directly above the support column, lifting and relocating the reaction member in this state to dismantle the upper part of the support column, and then driving the beam moving jack to connect the pair of engaging portions together again with the connecting beam; and a fifth step (e.g., step S18 described later) of repeating the second to fourth steps.

[0010] According to this invention, a pair of locking parts of the reaction member are locked to the side surfaces of the support column, and the pair of locking parts are connected to each other by a connecting beam, so that the locking parts and the connecting beam form a gate-shaped frame and the rigidity of the reaction member can be ensured. In this state, the connecting beam is positioned across the support column. After that, when the beam moving jack is driven to move the connecting beam horizontally, the connection between the pair of locking parts is released, and the connecting beam is retracted from directly above the support column. Therefore, there is no need to remove the reaction member from the support column when constructing or dismantling a building, and the reaction member can be moved upward even if reinforcing bars protrude from the top surface of the support column, allowing construction to be completed in a short period of time. According to the present invention, a crane installation floor is constructed with a crane installed on it, temporarily supported by a permanent column of a structure, and the crane installation floor is lowered along the column while the structure is dismantled by the crane. At this time, the horizontal displacement suppression device suppresses the horizontal displacement of the crane installation floor, so that the crane installation floor can be smoothly lowered along the column. Specifically, the following steps are repeated in sequence: temporary support of the crane installation floor by the support pillar, lowering of the crane installation floor by the lifting jack, repositioning of the reaction member downward, and dismantling of the upper part of the support pillar. At this time, the beam moving jack is driven to move the connecting beam away from directly above the support pillar, and in this state, the reaction member is lifted and repositioned downward, after which the upper part of the support pillar is dismantled, and next, the beam moving jack is driven to reconnect the pair of locking parts with the connecting beam again. By repeating this procedure, the support pillar can be dismantled from the top in order, while the reaction member is successively repositioned downward. Effect of the Invention

[0011] According to the present invention, it is possible to smoothly raise and lower the crane installation floor on which the crane is installed along the permanent column. Well, Methods for constructing structures and methods for dismantling structures may be provided. [Brief description of the drawings]

[0012] [Figure 1] 1 is a side view of a building construction system to which a crane hoisting system according to a first embodiment of the present invention is applied. [Diagram 2] FIG. 1 is a plan view of a building construction system. [Diagram 3] FIG. 2 is an enlarged view of the portion surrounded by dashed line A in the building construction system of FIG. 1. [Figure 4] FIG. 4 is a view of the building construction system of FIG. 3 taken along arrow II. [Diagram 5]FIG. 2 is a cross-sectional view of the building construction system of FIG. 3 along line II-II. [Figure 6] FIG. 3 is a cross-sectional view of the building construction system shown in FIG. [Figure 7] FIG. 4 is a cross-sectional view of the building construction system of FIG. 3 along line IV-IV. [Figure 8] FIG. 13 is a diagram showing the operation of a reaction member constituting the building construction system. [Figure 9] FIG. 1 is a schematic diagram (part 1) showing the operation of a locking device that constitutes a building construction system. [Figure 10] FIG. 2 is a schematic diagram (part 2) showing the operation of the locking device that constitutes the building construction system. [Figure 11] FIG. 2 is an enlarged plan view of a vibration prevention device that constitutes the building construction system. [Figure 12] FIG. 2 is a side view of a horizontal displacement suppression device that constitutes the building construction system. [Figure 13] 1 is a flowchart of a procedure for constructing a building using the building construction system. [Figure 14] 14 is an explanatory diagram (part 1) of the procedure for constructing a building using the building construction system. Fig. 14(a) shows the initial state of the building construction system. Fig. 14(b) shows the state after the building construction system has been moved up one floor. [Figure 15] This is an explanatory diagram (part 2) of the procedure for constructing a building using the building construction system, showing the state in which the crane installation floor has been temporarily supported again on the support columns. [Figure 16] 13 is a flowchart showing a procedure for demolishing an existing building using a building demolition system to which a crane hoisting system according to a second embodiment of the present invention is applied. [Figure 17] This is an explanatory diagram (part 1) of the procedure for demolishing a building using the building demolition system. [Figure 18] This is an explanatory diagram (part 2) of the procedure for demolishing a building using the building demolition system. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0013] The present invention relates to a crane lifting system, a method for constructing a structure using the crane lifting system, and a method for dismantling a structure using the crane lifting system. The crane lifting system of the present invention uses a permanent column to raise and lower a crane installation floor to which a crane is attached. In the crane lifting system, a horizontal displacement suppression device including a support, casters, and a spring is attached to the crane installation floor, and the crane installation floor is raised and lowered along the support column by a lifting jack while suppressing horizontal displacement of the crane installation floor relative to the support column. Hereinafter, an embodiment of the present invention will be described with reference to the drawings. In the following description of the embodiments, the same components are denoted by the same reference numerals, and the description thereof will be omitted or simplified. [First embodiment] Fig. 1 is a side view of a building construction system 2 to which a crane hoisting system according to a first embodiment of the present invention is applied. Fig. 2 is a plan view of the building construction system 2. The building construction system 2 is for constructing a building 1 as a structure. The building 1 under construction is a high-rise building made of reinforced concrete, and includes a plurality of precast reinforced concrete columns 11, a plurality of precast reinforced concrete beams 12, and a precast reinforced concrete floor 13. Here, some of the columns 11 are defined as support columns 11A that support the building construction system 2. The columns 11 are made by connecting precast concrete members 14 vertically as column members, and joints 15 are provided protruding from the opposing side surfaces of the columns 11. The beams 12 are constructed by connecting the joints 15 of the columns 11 together with precast concrete members. It has a rectangular shape in a plan view. Hereinafter, the longitudinal direction of this building 1 (building construction system 2) is defined as the X direction, and the lateral direction substantially perpendicular to the X direction is defined as the Y direction.

[0014] The building construction system 2 includes a crane installation floor 20, a crane 21 installed on the crane installation floor 20, a lifting device 22 attached to the support column 11A to lower the crane installation floor 20 along the support column 11A, a locking device 23 provided on the crane installation floor 20 and capable of locking to the upper surface of the joint part 15 of the support column 11A, a vibration prevention device 24 (see Figs. 4 and 5) that prevents the crane installation floor 20 from shaking in the horizontal direction, and a horizontal displacement suppression device 25 (see Figs. 11 and 12) provided on the crane installation floor 20 to suppress horizontal displacement of the crane installation floor 20 relative to the side surface of the support column 11A. In this embodiment, there are six support columns 11A, and the lifting device 22, the locking device 23, the vibration prevention device 24, and the horizontal displacement suppression device 25 are provided for each of the six support columns 11A.

[0015] The crane installation floor 20 comprises beam members 30 which are multiple H-shaped steel members that connect the lifting devices 22 together, and plate-shaped floor members 31 (shown by diagonal lines in Figure 2) which are covering plates placed on these beam members 30. The crane 21 comprises a base 32 formed by erecting steel materials in a crane mounting floor 20 in a crane mounting configuration, a mast 33 erected on the base 32, a crane body 34 rotatably supported on the mast 33, a jib 35 supported on the crane body 34 so that it can be raised and lowered, a hook (not shown) supported by hanging from the tip of the jib 35, and a hoisting device 36 attached to the crane body 34 for raising and lowering the hook.

[0016] Fig. 3 is an enlarged view of a portion of the building construction system 2 in Fig. 1 surrounded by a dashed line A. Fig. 4 is a view seen from an arrow II in Fig. 3. Fig. 5 is a cross-sectional view taken along line II-II in Fig. 3. Fig. 6 is a cross-sectional view taken along line III-III in Fig. 3. Fig. 7 is a cross-sectional view taken along line IV-IV in Fig. 3. The lifting device 22 comprises a rectangular frame 40 that surrounds the support pillar 11A and becomes part of the crane installation floor 20, a reaction member 41 attached to the upper end of the support pillar 11A, and strand jacks 43 as a pair of lifting jacks that are provided on the frame 40 and pull the reaction member 41.

[0017] The frame 40 includes a rectangular frame base 50 and a pair of gate-shaped jack supports 51 rotatably provided on the frame base 50 with the support column 11A in between. The beam members 30 of the crane installation floor 20 connect the frame bases 50 of the lifting devices 22 to each other.

[0018] The frame base 50 includes a pair of beam members 53A made of H-shaped steel extending generally parallel to each other in the X direction, and a pair of beam members 53B made of H-shaped steel connecting the beam members 53A to each other and extending generally parallel to each other in the Y direction. The jack support portion 51 is rotatably supported on the upper surface of the beam member 53B. The strand jack 43 is fixed to the jack support portion 51 facing upward.

[0019] The reaction member 41 includes a pair of locking parts 60 that lock onto the joint parts 15 on the side surfaces of the support column 11A, a connecting beam 61 that is disposed across the support column 11A and connects the pair of locking parts 60, and a beam moving jack 62 that is provided on each of the pair of locking parts 60 and horizontally moves the connecting beam 61. The pair of locking parts 60 are each connected to a hanging member 42 of a strand jack 43. In this way, the pair of locking parts 60 and the pair of connecting beams 61 form a gate-shaped frame with high rigidity in a side view.

[0020] In the above-described lifting device 22, when the strand jack 43 pulls the hanging material 42, the crane installation floor 20 rises relative to the support column 11A. On the other hand, when the strand jack 43 delivers the hanging material 42, the crane installation floor 20 descends relative to the support column 11A. Furthermore, when the beam moving jack 62 of the reaction member 41 is driven, as shown in FIG. 8, the connecting beam 61 moves horizontally and retreats from above the support column 11A, and the connection between the pair of locking portions 60 is released.

[0021] 9 and 10 are schematic diagrams showing the operation of the locking device 23. In FIG. 5 and 7, the locking device 23 includes a pair of bar beams 70 and a pair of opening / closing mechanisms 71A, 71B that move substantially horizontally in a direction to move the pair of bar beams 70 closer to or farther apart. The locking device 23 locks the pair of bar beams 70 by placing them on the upper surfaces of the pair of joint parts 15 of the support column 11A.

[0022] As shown in Figures 5 and 7, the opening and closing mechanism 71A is provided on one of the beam members 53A of the frame base 50, and includes a pair of support parts 72 that support one end side of a pair of latch beams 70 from below, and a moving mechanism 73 that moves the pair of support parts 72 approximately horizontally.

[0023] The support portion 72 comprises a horizontal piece 721 that supports the bottom surface of the bar beam 70 from below, and a pair of vertical pieces 722 that extend vertically from both ends of the horizontal piece 721 and abut against both side surfaces of the bar beam 70. The distance h1 from the upper surface of the horizontal piece 721 of the support portion 72 to the lower surface of the beam member 53A is slightly higher than the height dimension h2 of the bar beam 70. This allows the bar beam 70 to move horizontally without interfering with the beam member 53A.

[0024] The movement mechanism 73 includes a motor 74, a pulley 75 rotatably provided at a position horizontally spaced from the motor 74, and a chain 76 wound around the motor 74 and the pulley 75. One support part 72 is fixed to an upper part of the chain 76, and the other support part 72 is fixed to a lower part of the chain 76. By rotating a screw 77, the pulley 75 approaches or moves away from the motor 74, thereby making it possible to adjust the tension of the chain 76.

[0025] 5 and 7, the opening / closing mechanism 71B is provided on the other beam member 53A of the frame base 50, and includes a pair of support parts 72 that support the other ends of the pair of bar beams 70 from below, and a movement mechanism 73 that moves the pair of support parts 72 approximately horizontally. The support parts 72 and the movement mechanism 73 of the opening / closing mechanism 71B have the same configuration as the support parts 72 and the movement mechanism 73 of the opening / closing mechanism 71A.

[0026] The locking device 23 locks the crane installation floor 20 to the upper surface of the joint portion 15 protruding laterally from the support column 11A in the following manner (see FIG. 3). That is, by driving the motors 74 of the opening and closing mechanisms 71A, 71B and rotating the chain 76 in the direction of the arrow in Figure 9, the pair of bar beams 70 supported by the support parts 72 are brought closer to each other, and the pair of bar beams 70 are positioned above the joint parts 15 of the support pillar 11A. In this state, when the crane installation floor 20 is lowered by the lifting device 22, the bar beam 70 engages with the upper surface of the joint part 15 of the support column 11A, and the beam member 53A of the crane installation floor 20 engages with the bar beam 70 (see FIG. 9). As a result, the crane installation floor 20 is supported by the support column 11A. At this time, the bar beam 70 moves upward relative to the support portion 72, but since a pair of vertical pieces of the support portion 72 abut against both side surfaces of the bar beam 70, even if the bar beam 70 moves upward, the bar beam 70 can be prevented from falling off.

[0027] On the other hand, the locking device 23 releases the locked state of the joint portion 15 of the crane installation floor 20 in the following manner. That is, the crane installation floor 20 is slightly raised by the lifting device 22, and the bar beam 70 is moved downward relative to the support part 72 and placed on the horizontal piece 721 of the support part 72. As a result, a gap is formed between the upper surface of the bar beam 70 and the lower surface of the beam member 53A. In this state, the motors 74 of the opening / closing mechanisms 71A, 71B are driven to rotate the chain 76 in the direction of the arrow in Fig. 10, thereby separating the pair of bar beams 70 supported by the support parts 72. The pair of bar beams 70 are retracted from above the joint parts 15 of the support pillars 11A. This allows the bar beams 70 to move horizontally smoothly without contacting the bar beams 70 with the beam member 53A (see Fig. 5).

[0028] FIG. 11 is an enlarged plan view of the anti-vibration device 24. As shown in FIG. The anti-sway device 24 is provided on the crane installation floor 20 and abuts against the side of the support column 11A to suppress horizontal shaking of the crane installation floor 20. As also shown in Figure 5, the anti-sway device 24 comprises a pair of first support members 80 extending in the X direction and erected between beam members 53B of the crane installation floor 20 so as to be horizontally movable in the Y direction, a pair of second support members 81 provided on each first support member 80 so as to be horizontally movable in the X direction, bolts 82 screwed into each second support member 81 to adjust the protruding dimension from the second support member in the Y direction, and sliding members 83 provided on each second support member 81 and having a smooth surface.

[0029] The first support member 80 is installed between a pair of beam members 53B and disposed to sandwich the support column 11A from the Y direction. Both ends of the first support member 80 are selectively fixed with bolts to a plurality of bolt insertion holes (not shown) formed in the beam member 53B. This allows the first support member 80 to be temporarily fixed to any position of the beam member 53B in the Y direction. The second support members 81 are provided on each of the first support members 80 and are disposed to sandwich the support column 11A in the X direction. The second support members 81 are selectively fixed with bolts to a plurality of bolt insertion holes 84 formed in the first support members 80. This makes it possible to provisionally fix the second support members 81 to any position of the first support members 80 in the X direction. The sliding member 83 is located near the edge of the support column 11A. When the crane installation floor 20 is raised or lowered, the sliding member 83 slides on the support column 11A, thereby ensuring smooth raising and lowering of the crane installation floor 20.

[0030] 11, in the anti-sway device 24, the bolt 82 is rotated and advanced so that the head of the bolt 82 abuts against the side surface of the support column 11A, thereby preventing the crane installation floor 20 from swaying in the X direction. On the other hand, the anti-sway device 24 can be released from the anti-sway function in the X direction of the crane installation floor 20 by rotating and retracting the bolt 82. In addition, by driving a wedge 85 between the sliding member 83 and the end edge of the support column 11A, the vibration prevention in the Y direction of the crane installation floor 20 is performed. On the other hand, by removing the wedge 85, the vibration prevention in the Y direction of the crane installation floor 20 can be released.

[0031] The horizontal displacement suppression devices 25 are provided on the side surfaces 16 of the support pillars 11A on which the joint parts 15 are not provided. Specifically, for example, as shown in Fig. 6, two horizontal displacement suppression devices 25 are provided on each of the side surfaces 16 of the support pillars 11A on which the joint parts 15 are not provided. 12(a) and 12(b) are side views of the horizontal displacement suppression device 25. FIG. The horizontal displacement suppression device 25 comprises a support part 90 provided on the crane installation floor 20, a caster 91 provided so as to be capable of being protruded and retracted into the support part 90, and a coil spring 92 provided on the support part 90 and biasing the caster 91 against the side of the support column 11A. The support portion 90 comprises a single pipe 901 protruding from the crane installation floor 20 toward the side surface 16 of the support column 11A.

[0032] The caster 91 is a general-purpose product with a height adjustment function. That is, the caster 91 includes a base 911, a wheel 912 rotatably supported by the base 911, a stopper 913 provided on the base 911 for stopping the rotation of the wheel 912, a rod-shaped male threaded portion 914 provided on the base 911 and inserted into the single pipe 901 of the support portion 90, and a handle 915 screwed into the male threaded portion 914. The wheels 912 are rotatable about a horizontal axis, and therefore can move smoothly up and down on the side surface 16 of the support column 11A. The stopper 913 includes an extension piece 916 extending from the base 911, and a lever 917 rotatably provided on the base 911 and causing the tip of the extension piece 916 to abut against the wheel 912. By rotating the lever 917, the extension piece 916 abuts against the wheel 912, and the rotation of the wheel 912 is stopped. The single pipe 901 of the support part 90 is inserted into one end of the coil spring 92. Meanwhile, the male threaded portion 914 of the caster 91 is inserted into the other end of the coil spring 92, and this male threaded portion 914 is further inserted so as to be able to protrude and retract into the single pipe 901 of the support part 90. Then, one end of the coil spring 92 is engaged with the end face of the single pipe 901 of the support part 90, and the other end of the coil spring 92 is engaged with a handle 915 of the caster 91.

[0033] According to the horizontal displacement suppression device 25, as the handle 915 is rotated to approach the support part 90, the length of the coil spring 92 is shortened, the biasing force of the coil spring 92 against the caster 91 is increased, and the pressing force of the wheel 912 against the side surface 16 of the support column 11A is increased. For example, as shown in FIG. 12(a), when the length of the coil spring 92 is L1, the pressing force of the wheel 912 against the support column 11A is set to P1. From this state, as shown in FIG. 12(b), when the handle 915 is rotated to set the length of the coil spring 92 to L2, which is shorter than L1, the pressing force of the wheel 912 against the support column 11A becomes P2, which is larger than P1. In this embodiment, when the crane installation floor 20 is supported by the support column 11A, the pressing force of the wheel 912 against the support column 11A is set to P2. On the other hand, when the lifting device 22 raises and lowers the crane installation floor 20, the pressing force of the wheels 912 against the support column 11A is reduced to P1, and in this state, the wheels 912 run up and down along the side surface 16 of the support column 11A.

[0034] The procedure for constructing the building 1 will be described below with reference to the flow chart in Fig. 13. Note that Figs. 14 and 15 show only a part of the building construction system 2. In step S1, as shown in Fig. 14(a), a building construction system 2 is constructed on a predetermined floor (e.g., the nth floor) of a building 1. That is, a crane installation floor 20, a crane 21, a lifting device 22, a locking device 23, and a vibration prevention device 24 are erected on the predetermined floor of the building 1. Specifically, for the portion where the crane installation floor 20 is to be constructed, the reaction member 41 of the lifting device 22 is attached to the top of the support column 11A. Also, the latch beam 70 of the locking device 23 is placed on the joint portion 15 of the support column 11A, so that the crane installation floor 20 is temporarily supported by the support column 11A. In addition, the bolt 82 of the anti-sway device 24 prevents the crane installation floor 20 from vibrating in the X direction, and the wedge 85 of the anti-sway device 24 is attached to prevent the crane installation floor 20 from vibrating in the Y direction. In addition, the pressing force of the wheel 912 against the support column 11A is set to P2 by the horizontal displacement suppression device 25.

[0035] In step S2, one story of the building 1 is constructed using the crane 21. In step S3, as shown in Figure 14(a), the beam moving jack 62 of the reaction member 41 is driven to move the connecting beam 61 away from directly above the support column 11A, and in this state, a precast concrete member 14 is attached on top of the support column 11A to extend the support column 11A upward by one story. In step S4, as shown in FIG. 14(b), the reaction member 41 is lifted by the crane 21 and moved one layer upward, and then the beam moving jack 62 is driven to connect the pair of locking portions 60 together again with the connecting beam 61.

[0036] In step S5, the temporary support of the crane installation floor 20 by the support columns 11A is released. That is, the vibration prevention of the crane installation floor 20 by the support column 11A is released. Specifically, the bolt 82 of the vibration prevention device 24 is retracted, and the wedge 85 of the vibration prevention device 24 is removed. Next, tension is introduced into the hanging material 42 by the strand jack 43, and the crane installation floor 20 is lifted slightly upward and cleared from the ground. In this state, the opening and closing mechanisms 71A, 71B of the locking device 23 are driven to retract the pair of bar beams 70 from above the joint portion 15 of the support column 11A. In addition, the horizontal displacement suppression device 25 reduces the pressing force of the wheels 912 against the support column 11A to P1. In step S6, as shown in Fig. 15, the strand jack 43 is driven to raise the crane installation floor 20 by one layer along the support columns 11A. At this time, the lifting of the crane installation floor 20 is guided by the sliding member 83 of the anti-sway device 24.

[0037] In step S7, the crane installation floor 20 is temporarily supported again by the support columns 11A. That is, the opening and closing mechanisms 71A, 71B of the locking device 23 are driven to position the pair of bar beams 70 above the joint part 15 of the support column 11A. Next, the crane installation floor 20 is lowered by the strand jack 43 to lock the bar beam 70 onto the upper surface of the joint part 15 of the support column 11A. Next, the bolt 82 of the anti-sway device 24 is used to prevent the crane installation floor 20 from vibrating in the X direction, and the wedge 85 of the anti-sway device 24 is attached to prevent the crane installation floor 20 from vibrating in the Y direction. In step S8, steps S2 to S7 are repeated.

[0038] According to this embodiment, the following effects are obtained. (1) When the crane installation floor 20 is raised and lowered along the support column 11A, the horizontal displacement suppression device 25 causes the caster 91 to move while abutting against the side surface 16 of the support column 11A by the biasing force of the coil spring 92, so that it is possible to suppress a large horizontal displacement of the crane installation floor 20 relative to the support column 11A. In addition, because the caster 91 runs on the side surface 16 of the support column 11A, it is possible to smoothly raise and lower the crane installation floor 20 along the support column 11A. This improves the workability of construction work and demolition work using the crane 21. (2) The pair of locking portions 60 of the reaction member 41 are locked to the joint portions 15 on the side surfaces of the support column 11A, and the pair of locking portions 60 are connected to each other by a connecting beam 61, thereby forming a gate-shaped frame with the locking portions 60 and ensuring the rigidity of the reaction member 41. In this state, the connecting beam 61 is disposed straddling the support column 11A. After that, when the beam moving jack 62 is driven to move the connecting beam 61 horizontally, the connection between the pair of locking portions 60 is released, and the connecting beam 61 retreats from directly above the support column 11A. Therefore, when constructing or dismantling the building 1, there is no need to once remove the reaction member 41 from the support column 11A, so construction can be completed in a short period of time.

[0039] (3) Some of the permanent columns 11 of the building 1 are used as support columns 11A, and a crane installation floor 20 with a crane 21 installed is constructed by temporarily supporting the support columns 11A, and the crane installation floor 20 is raised along the support columns 11A while the building 1 is being constructed by the crane 21. At this time, the horizontal displacement suppression device 25 suppresses the horizontal displacement of the crane installation floor 20, so that the crane installation floor 20 can be smoothly raised along the support columns 11A. Specifically, the following steps are repeated in sequence: temporary support of the crane installation floor 20 by the support column 11A, extension of the support column 11A, repositioning of the reaction member 41 upward, and raising of the crane installation floor 20 by the strand jack 43. At this time, the beam moving jack 62 is driven to move the connecting beam 61 away from directly above the support column 11A, and the precast concrete member 14 is attached to the top of the support column 11A and extended upward, after which the reaction member 41 is lifted and repositioned upward, and the beam moving jack 62 is driven to connect the pair of locking parts 60 together again with the connecting beam 61. By repeating this procedure, the support column 11A can be constructed and extended upward while the reaction member 41 is successively repositioned upward.

[0040] Second Embodiment This embodiment differs from the first embodiment in that an existing building 3 made of reinforced concrete as a structure is demolished by a building demolition system 4 to which the crane hoisting system according to the second embodiment is applied. The building demolition system 4 has the same configuration as the building construction system 2. Hereinafter, a procedure for demolishing an existing building 3 by the building demolition system 4 will be described with reference to the flowchart of Fig. 16. Note that Figs. 15 and 16 show only a part of the building construction system 2. In step S11, as shown in FIG. 17(a), a building demolition system 4 is constructed on a predetermined floor (eg, the nth floor) of an existing building 3, similarly to step S1. In step S12, the existing building 3 is disassembled into one floor using the crane 21. In step S13, similarly to step S5, the temporary support of the crane installation floor 20 by the support columns 11A is released. In step S14, as shown in Fig. 17(b), the strand jack 43 is driven to lower the crane installation floor 20 by one layer along the support columns 11A. At this time, the sliding member 83 of the anti-sway device 24 guides the lowering of the crane installation floor 20. In step S15, similarly to step S7, the crane installation floor 20 is temporarily supported again by the support columns 11A.

[0041] In step S16, as shown in FIG. 18(a), the beam moving jack 62 of the reaction member 41 is driven to move the connecting beam 61 away from directly above the support column 11A, and the reaction member 41 is lifted by the crane 21 and repositioned downward. In step S17, as shown in FIG. 18(b), the support columns 11A are removed by one floor, and then the beam moving jacks 62 are driven to connect the pair of locking portions 60 together by the connecting beams 61 again. In step S18, steps S12 to S17 are repeated. According to this embodiment, in addition to the above-mentioned advantages (1) and (2), the following advantages are obtained.

[0042] (4) Some of the permanent columns 11 of the existing building 3 are used as support columns 11A, and a crane installation floor 20 on which a crane 21 is installed is constructed by temporarily supporting the support columns 11A, and the crane installation floor 20 is lowered along the support columns 11A while the existing building 3 is demolished by the crane 21. At this time, the horizontal displacement suppression device 25 suppresses the horizontal displacement of the crane installation floor 20, so that the crane installation floor 20 can be smoothly lowered along the support columns 11A. Specifically, the following steps are repeated in sequence: temporary support of the crane installation floor 20 by the support column 11A, lowering of the crane installation floor 20 by the strand jack 43, repositioning of the reaction member 41 downward, and dismantling of the upper part of the support column 11A. At this time, the beam moving jack 62 is driven to move the connecting beam 61 away from directly above the support column 11A, and in this state, the reaction member 41 is lifted and repositioned downward, after which the upper part of the support column 11A is dismantled, and next, the beam moving jack 62 is driven to connect the pair of locking parts 60 together again with the connecting beam 61. By repeating this procedure, the support column 11A can be dismantled from the top in order, while the reaction member 41 is successively repositioned downward.

[0043] The present invention is not limited to the above-described embodiment, and modifications and improvements within the scope of the present invention that can achieve the object of the present invention are included in the present invention. For example, as in the first embodiment described above, the crane hoisting system of the present invention may be applied to a building construction system 2 to construct a building 1 made of reinforced concrete, or as in the second embodiment described above, the crane hoisting system of the present invention may be applied to a building demolition system 4 to demolish an existing building 3 made of reinforced concrete. In addition, in each of the above-described embodiments, the building construction system 2 and the building demolition system 4 have been applied to the construction and demolition of buildings made of reinforced concrete, but they may also be applied to the construction and demolition of buildings made of steel frame or steel-framed reinforced concrete. [Explanation of symbols]

[0044] 1...Building (structure) 2...Building construction system (crane lifting system) 3... Existing building (structure) 4... Building demolition system (crane lifting system) 11...Column 11A...Support column 12...Beam 13...Floor 14...Precast concrete member 15...Joint 16...Side where no support joint is provided 20... Crane installation floor 21... Crane 22... Lifting device 23: Locking device 24: Vibration prevention device 25: Horizontal displacement suppression device 30: Beam member 31: Floor member 32: Base 33: Mast 34: Crane body 35...Jib 36...Hoisting device 40: frame; 41: reaction member; 42: hanging member 43...Strand jack (lifting jack) 50...frame base portion 51...jack support portion 53A, 53B...beam member 60: locking portion 61: connecting beam 62: beam moving jack 70: bar beam 71A, 71B: opening and closing mechanism 72: support portion 73: moving mechanism 74...Motor 75...Pulley 76...Chain 77...Screw 80: First support member; 81: Second support member; 82: Bolt; 83: Slide member 84...Bolt insertion hole 85...Wedge 90: Support portion 91: Caster 92: Coil spring 721...Horizontal piece 722...Vertical piece 901... Single pipe 911... Base 912... Wheel 913: Stopper 914: Male thread 915: Handle 916...Extension piece 917...Lever

Claims

1. A method for constructing a structure using a crane lifting system, comprising: The crane hoisting system includes a support column which is a permanent column, a crane installation floor which supports a crane, a horizontal displacement suppression device which is provided on the crane installation floor and suppresses horizontal displacement of the crane installation floor relative to a side surface of the support column, a reaction member which is provided on an upper end side of the support column, and a lifting jack which is attached to the reaction member and raises and lowers the crane installation floor, the horizontal displacement suppression device comprises a support part provided on the crane installation floor, a caster provided on the support part so as to be capable of projecting and retracting, and a spring provided on the support part for urging the caster against a side surface of the support column, The reaction member includes a pair of locking portions that lock onto the side surfaces of the support column, a connecting beam that is arranged across the support column and connects the pair of locking portions, and a beam moving jack that is provided on the locking portion and moves the connecting beam horizontally. a first step of attaching a reaction member to an upper end of the support column and temporarily supporting the crane installation floor on the support column; a second step of constructing the structure for a predetermined number of floors using the crane; a third step of driving the beam moving jack to move the connecting beam away from directly above the support column, attaching a column member to the top of the support column and extending it upward in this state, lifting the reaction member and repositioning it upward, and driving the beam moving jack to connect the pair of engaging portions together again with the connecting beam; a fourth step of releasing the temporary support of the crane installation floor by the support column, and raising the crane installation floor along the support column by the lifting jack while suppressing horizontal displacement of the crane installation floor relative to the side surface of the support column by the horizontal displacement suppression device, thereby temporarily supporting the crane installation floor on the support column again; A method for constructing a structure, comprising a fifth step of repeating the second step to the fourth step.

2. A method for dismantling a structure using a crane lifting system, comprising: The crane hoisting system includes a support column which is a permanent column, a crane installation floor which supports a crane, a horizontal displacement suppression device which is provided on the crane installation floor and suppresses horizontal displacement of the crane installation floor relative to a side surface of the support column, a reaction member which is provided on an upper end side of the support column, and a lifting jack which is attached to the reaction member and raises and lowers the crane installation floor, the horizontal displacement suppression device comprises a support part provided on the crane installation floor, a caster provided on the support part so as to be capable of projecting and retracting, and a spring provided on the support part for urging the caster against a side surface of the support column, The reaction member includes a pair of locking portions that lock onto the side surfaces of the support column, a connecting beam that is arranged across the support column and connects the pair of locking portions, and a beam moving jack that is provided on the locking portion and moves the connecting beam horizontally. a first step of attaching a reaction member to an upper end of the support column and temporarily supporting the crane installation floor on the support column; A second step of disassembling the structure into predetermined floors using the crane; a third step of releasing the temporary support of the crane installation floor by the support column, lowering the crane installation floor along the support column by the lifting jack while suppressing horizontal displacement of the crane installation floor relative to the side surface of the support column by the horizontal displacement suppression device, and then temporarily supporting the crane installation floor on the support column again; A fourth step of driving the beam moving jack to move the connecting beam away from directly above the support column, lifting and lowering the reaction member in this state to dismantle the upper part of the support column, and then driving the beam moving jack to connect the pair of engaging portions together again with the connecting beam; a fifth step of repeating the second step to the fourth step.

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