Column lifting jig and method for lifting columns

Abstract

To provide a column suspending jig which can be easily attached to a column while suppressing interference with a constituent member of the column.SOLUTION: A column suspending jig 1 is connected to a suspending device C1 and used when suspending a column P1. The column suspending jig 1 includes a jig body 10 connected to the suspending device C1 and attached to the outer surface of a column P1, and a holding member 20 that holds the jig body 10 attached to the outer surface of the column P1. The jig body 10 has a connecting part 11 arranged on one end side in the vertical direction of the jig body 10 and connected to the suspending device C1, and a locking part 13 arranged on the other end side in the vertical direction of the jig body 10 and locked in the vertical direction for the locked part P2 provided on the column P1. The holding member 20 is attached to the jig body 10 toward the outer surface of the column P1 to cover the locking part 13 from the side, and holds the locking part 13 in a state of being locked to the locked part P2.SELECTED DRAWING: Figure 1

Description

【Technical Field】 【0001】 The present invention relates to a column lifting jig and a method for lifting a column, and particularly to a column lifting jig and a method for lifting a column that are connected to a lifting device and used when lifting a column. 【Background Art】 【0002】 Conventionally, in the operation of lifting a column, a method of using a column lifting jig to lift the column by a lifting device such as a crane is generally used. For example, in the lifting method described in Patent Document 1, the column lifting jig is fixed to the lower part of the column, and the operation of lifting the column by the lifting device is performed. As a configuration for fixing the column lifting jig to the lower part of the column, it has been proposed that the locking piece (locking part) of the column lifting jig is inserted into the engaging part (locked part) attached to the column, and the column lifting jig is locked to the column. 【Prior Art Documents】 【Patent Documents】 【0003】 【Patent Document 1】 Japanese Unexamined Patent Application Publication No. 2021-008722 【Summary of the Invention】 【Problems to be Solved by the Invention】 【0004】 By the way, in such a method, the locking part is inserted into the locked part so as to sandwich the locked part from both sides in the vertical direction. Therefore, when the locking part is inserted into the locked part, the locking part may interfere with the component members such as the welding beads and base metal objects provided in the vicinity of the locked part, and there is a possibility that the column lifting jig cannot be attached to the column. 【0005】 The present invention has been made in view of the above problems, and an object of the present invention is to provide a column lifting jig that can be easily attached to a column while suppressing interference with the component members of the column, and a method for lifting a column using the column lifting jig. 【Means for Solving the Problems】 【0006】 The aforementioned problem is solved by the column lifting jig according to the present invention, which is used when lifting a column and is connected to a lifting device, comprising: a jig body connected to the lifting device and attached to the outer surface of the column; and a holding member that holds the jig body attached to the outer surface of the column, wherein the jig body has a connecting portion arranged on one end in the vertical direction of the jig body and connected to the lifting device, and a locking portion arranged on the other end in the vertical direction of the jig body and locking in the vertical direction to a locking portion provided on the column, and the holding member is attached to the jig body toward the outer surface of the column so as to cover the locking portion from the side, and holds the locking portion in a state where it is locked to the locking portion. 【0007】 According to the above-described column suspension jig, the holding member is attached to the jig body toward the outer surface of the column so as to cover the holding portion, and maintains the locked state of the locking portion. Therefore, the holding member can fix the jig body to the column while avoiding other members provided around the locked portion. In other words, the above-described column holder can be easily attached to a column while suppressing interference with the column's constituent members. 【0008】 Furthermore, in the column suspension jig described above, the locking portion has a through portion that penetrates the locked portion in the vertical direction, and a locking claw provided at the tip of the through portion that hooks onto the locked portion, and the holding member preferably holds the locking portion with the locking claw hooked onto the locked portion. In this way, since the locking portion is inserted through the engaged portion in the vertical direction, interference between the column suspension jig and other members provided above and below the locked portion can be suppressed. Furthermore, since the locking part penetrates the locked part, it becomes easier to confirm the locking state. 【0009】 Furthermore, in the column holder described above, the holding member has a base portion attached to the jig body that covers the locking portion, which is locked to the locking portion, from the side toward the outer surface of the column, and a projection portion that protrudes from the base portion toward the outer surface of the column, wherein the projection portion abuts against the locking portion to hold the locking portion locked to the locking portion. In this way, the protrusion restricts the horizontal movement of the locking part, thus preventing the locking part from coming loose from the locked part due to lateral swaying when the column is lifted. 【0010】 Furthermore, in the column holder described above, the projection is preferably used to restrict the movement of the locking portion in the left-right direction by contacting the locking portion from the left-right direction, which is perpendicular to both the vertical direction and the opposing direction in which the column and the jig body face each other. In this way, the protrusion restricts the lateral movement of the locking part, thus preventing the locking part from coming loose from the locked part due to lateral swaying when the column is lifted. 【0011】 Furthermore, in the column holder described above, a pair of locking portions are provided at the lower end of the jig body, the pair of locking portions are arranged side by side in the left-right direction, and the projection is inserted between the pair of locking portions to restrict the movement of the pair of locking portions in the left-right direction. In this way, the column lifting jig can be more firmly fixed to the column because it is locked to the locked portion by a pair of locking parts. In addition, the projection restricts the lateral movement of the pair of locking parts, thus preventing the pair of locking parts from coming loose from the locked portion due to lateral swaying when the column is lifted. 【0012】 Furthermore, in the column holder described above, the pair of locking portions has a pair of through portions that penetrate the locked portion in the vertical direction, a pair of mounting portions provided at the base ends of the pair of through portions for attaching the holding member, and a pair of locking claws provided at the tips of the pair of through portions for hooking onto the locked portion, and the projection portion preferably has an upper projection portion positioned between the pair of mounting portions and a lower projection portion positioned between the pair of locking claws. In this way, by arranging multiple protrusions between a pair of locking parts, the locked state can be held more firmly. 【0013】 Furthermore, in the column holder described above, the jig body further has a link portion that connects the connecting portion and the locking portion, the link portion rotates about an axis extending along the opposing directions in which the column and the jig body face each other, and the locking portion moves in directions perpendicular to the vertical direction and the opposing direction with respect to the connecting portion as the link portion rotates. Thus, since the locking part can move left and right by the rotation of the link part, the locking part can be locked to the part to be locked with a simple configuration. 【0014】 Furthermore, the column lifting method using the column lifting jig described above includes an attachment step of attaching the jig body to the outer surface of the column, a holding step of attaching the holding member to the jig body, and a lifting step of lifting the column using the lifting device, wherein in the attachment step, the locking portion of the jig body is locked to the locking portion of the column, and in the holding step, after the attachment step, the holding member is attached to the jig body such that the holding member covers the locking portion from the side toward the outer surface of the column. According to the above method, after visually confirming the locked state of the locking part, a holding member is attached to the jig body to hold the locking part in the locked state, thereby allowing the column to be safely lifted. [Effects of the Invention] 【0015】 According to the column suspension jig and the column lifting method of the present invention, it can be easily attached to the column while suppressing interference with the constituent members of the column. 【Brief Explanation of the Drawings】 【0016】 [Figure 1] It is a perspective view of the column suspension jig of the present embodiment, showing a state where the column suspension jig is attached to the column. [Figure 2] It is a perspective view of the column suspension jig. [Figure 3] It is a front view of the column and the jig main body, showing a state where the locking portion is inserted into the locked portion. [Figure 4] It is a front view of the column, the jig main body, and the holding member, showing a state where the holding member holds the locking portion in a state of being locked to the locked portion. [Figure 5] It is a side view of the jig main body and the holding member, showing a state where the holding member is attached to the jig main body. [Figure 6] It is a cross-sectional view of the link portion along the line VI-VI of FIG. 4. [Figure 7] It is a view showing a state where the jig main body is locked to the column. [Figure 8] It is a view showing a state where the holding member is attached in a state where the jig main body is locked to the column. 【Embodiments for Carrying Out the Invention】 【0017】 Hereinafter, based on FIGS. 1 to 8, the column suspension jig 1 of an embodiment of the present invention (hereinafter, this embodiment) will be described. In the following description, as shown by the arrow shown in FIG. 1, the "vertical direction" means the vertical direction of the steel column P1 in the erected state. The "horizontal direction" means the width direction of the steel column P1 in the erected state. Further, the facing direction in which the erected steel column P1 and the column suspension jig 1 face each other is defined as the "facing direction". In the "facing direction", the outside and the inside are defined based on the outer surface of the steel column P1. That is, the direction in which the column suspension jig 1 approaches the outer surface is the "inner direction", and the direction in which the column suspension jig 1 moves away from the outer surface is the "outer direction". Furthermore, the width direction of the outer surface of the erected steel column P1, when viewed from the front, is defined as the "left-right direction." Note that the "left-right direction" is perpendicular to both the "up-down direction" and the "opposite direction." 【0018】 <Column Lifting Fixture> As shown in Figures 1 to 8, the column lifting jig 1 is connected to the crane C1 (lifting device) and is used when lifting the steel column P1. More specifically, the column lifting jig 1 is used in conjunction with the crane C1 to lift the steel columns P1 used in the building's structure and move them to a designated location. 【0019】 The column lifting jig 1 mainly consists of a jig body 10 connected to the crane C1, a holding member 20 that holds the jig body 10, and a fixing device 30 for fixing the holding member 20 attached to the jig body 10. 【0020】 As shown in Figure 1, the steel column P1 is a steel column with a rectangular cross-section. A locking part P2 is attached to the outer surface of the lower part of the steel column P1, for example, to install a work platform that will serve as temporary scaffolding. 【0021】 The locking portion P2 is formed by bending a plate-shaped member, as shown in Figures 1, 3 to 5, and is attached to the outer surface of the steel column P1 by welding or the like. One locking portion P2 is attached to each outer surface of the lower part of the steel column P1. The column lifting jig 1 can lift the steel column P1 by locking it to the locking portions P2 located in opposite directions on the outer surface of the steel column P1. 【0022】 Two vertically extending through-holes P3 are formed between the steel column P1 and the locking portion P2. Specifically, two openings are formed at the upper end opening P2a of the locking portion P2, and two openings are formed at the lower end opening P2b of the locking portion P2. By inserting the claw portion of the work platform into the locking portion P2 (through hole P3), the work platform can be suitably installed. Furthermore, the steel column P1 can be suitably lifted using this locking portion P2. 【0023】 As shown in Figure 1, a column plate P4 for fixing to the foundation is provided at the lower end of the steel column P1. Bolt holes P5 for passing anchor bolts for fixing to the foundation are formed at the four corners of the column plate P4. 【0024】 <Jig body> As shown in Figures 2 to 7, the jig body 10 is attached to the outer surface of the steel column P1 and detachably locks the column suspension jig 1. As shown in Figure 2, the jig body 10 includes a connecting portion 11 located on the upper end of the jig body 10, a pair of link portions 12 located in the central part of the jig body 10, and a pair of locking portions 13 located at the lower end of the jig body 10. 【0025】 As shown in Figures 2 to 7, the connecting portion 11 is connected to the crane C1 and includes a base portion 11a, left and right side portions 11b connected to the base portion 11a, a bottom portion 11c connected to the left and right side portions 11b and to which the link portion 12 is rotatably attached, and a wire fixing portion 11d connected to the base portion 11a and connected to the crane connecting member C2. 【0026】 The base portion 11a is a metal member formed in the shape of a rectangular plate, and it fixes the wire fixing portion 11d. The side portion 11b is a trapezoidal metal member that extends downward from both ends of the base portion 11a. The bottom portion 11c is provided at a predetermined distance from the base portion 11a by the side portion 11b. A first screw hole 11ca for attaching the link portion 12 is formed in the bottom portion 11c (see Figure 6). Two first screw holes 11ca are formed in the bottom portion 11c at predetermined distances apart in the left-right direction. 【0027】 The wire fixing part 11d is mounted to the base part 11a so as to be rotatable about its central axis in the vertical direction. This allows the wire of the crane C1 to twist even if it is twisted after the crane connecting member C2 is attached, by allowing the wire fixing part 11d to rotate appropriately to eliminate the twist. 【0028】 Furthermore, as shown in Figure 1, the wire fixing part 11d is connected to the crane C1 via a crane connecting member C2 which is connected to the crane C1. Crane C1 is a lifting device having a wire, sling, chain, etc., extending downward. Crane connecting member C2 is connected to the wire, etc., extending from crane C1 and is hooked onto the wire fixing part 11d. Crane connecting member C2 is, for example, a hook with a hook mechanism, but it may also be a shackle or the like. 【0029】 As shown in Figures 3 to 6, the link section 12 is a link mechanism that connects the connecting section 11 and the locking section 13, and connects the connecting section 11 and the locking section 13 so that they can move relative to each other. The link section 12 has a long plate-shaped link plate 12a, a first screw 12b for attaching the upper end of the link plate 12a to the connecting section 11, and a second screw 12c for attaching the lower end of the link plate 12a to the locking section 13. A pair of link sections 12 are provided at the lower end of the connecting section 11 and are arranged side by side in the left-right direction. 【0030】 As shown in Figure 6, the link plate 12a has a first hole 12d and a second hole 12e that penetrate in the direction in which the steel column P1 and the column suspension jig 1 face each other (opposing direction). The first screw 12b is inserted into the first hole 12d formed on the upper end side of the link plate 12a. The second screw 12c is inserted into the second hole 12e formed on the lower end side of the link plate 12a. The first screw 12b and the second screw 12c are threaded only at their tips. The tip of the first screw 12b is inserted into the first hole 12d and screwed into the first threaded hole 11ca formed in the bottom 11c. The link plate 12a is attached to the bottom 11c with some play in the opposing direction. The tip of the second screw 12c is inserted into the second hole 12e and screwed into the second screw hole 14a formed in the connecting part 14, which will be described later. The link plate 12a is attached to the connecting part 14 with some play in the opposing direction. 【0031】 As shown in Figure 3, the upper end of the link plate 12a is rotatably attached to the connecting portion 11 by the first screw 12b, and rotates in the direction of arrow A about an axis extending in the opposite direction. The lower end of the link plate 12a is rotatably attached to the upper end of the locking portion 13 by the second screw 12c, and rotates in the direction of arrow B about an axis extending in the opposite direction. Thus, the link portion 12 rotates in the direction of arrow A about an axis extending in the opposite direction. The locking portion 13 is then movable in the left-right direction relative to the connecting portion 11 along the outer surface of the steel column P1 as the link portion 12 rotates. 【0032】 As shown in Figures 2 to 7, the locking portion 13 is detachably locked vertically to the locked portion P2 of the steel column P1. The pair of locking portions 13 are connected to the lower ends of the pair of link portions 12 and are arranged side by side in the left-right direction. The locking portion 13 includes a connecting portion 14 connected to the lower end of the link portion 12, a mounting portion 15 provided below the connecting portion 14, a through portion 16 extending downward from the mounting portion 15, and a locking claw 17 formed at the tip of the through portion 16. 【0033】 As shown in Figures 2, 5, and 6, the connecting portion 14 is a long, rod-shaped member extending in opposing directions, connecting the connecting portion 11 and the mounting portion 15. A pair of connecting portions 14 are provided side by side in the left-right direction, and each is connected to the lower end of a pair of link portions 12. 【0034】 As shown in Figure 5, the pair of connecting parts 14 are each attached to the lower end of the link plate 12a on a surface facing the outer surface of the steel column P1. Since the bottom 11c of the connecting part 11 has length in the opposing direction, the link part 12 connected to the surface of the bottom 11c in the outward direction is spaced a predetermined distance (a distance corresponding to the length of the bottom 11c) from the outer surface of the steel column P1. Since the connecting part 14 is arranged to extend in the opposing direction, even if the bottom 11c has length, the locking part 13 can be inserted into the locking part P2 from above and below. 【0035】 As shown in Figure 6, a second screw hole 14a is formed on the outer surface of the connecting portion 14. The connecting portion 14 is rotatably attached to the link plate 12a by the second screw 12c, which is screwed into the second screw hole 14a. As shown in Figure 3, the connecting portion 14 is rotatable in the direction of arrow B around an axis extending in the opposite direction. In other words, the pair of locking portions 13 can move left and right while remaining parallel to each other due to the rotational movement of the link portion 12. 【0036】 As shown in Figures 2 to 5, the mounting portion 15 is a roughly L-shaped plate and is the part for attaching the retaining member 20. A pair of mounting portions 15 are provided side by side in the left-right direction and are connected to the inner ends of the pair of connecting portions 14. Specifically, the right-side mounting portion 15 has a downward extension portion that extends downward from the connecting portion 14, and a projection portion that protrudes to the right from the downward extension portion. A mounting hole 15a for attaching the retaining member 20 is formed in the projection portion. Note that the left-side mounting portion 15 is configured symmetrically with the right-side mounting portion 15, so its description is omitted. 【0037】 As shown in Figures 2 to 5, the through-sections 16 are elongated plate-like structures that extend downward from each of the pair of mounting sections 15 and penetrate the locking section P2 in the vertical direction. A pair of through-sections 16 are provided side by side in the left-right direction and are connected to the lower ends of the pair of mounting sections 15. 【0038】 As shown in Figures 2 to 5, the locking claw 17 is a roughly trapezoidal plate-like portion that is hooked onto the locked portion P2. A pair of locking claws 17 are provided side by side in the left-right direction and are connected to the ends of a pair of through portions 16. The pair of locking claws 17 are each inserted into the through holes P3 and moved in a direction away from each other (left and right direction) to engage with the locking portion P2. 【0039】 As shown in Figure 3, the mounting portion 15 is longer in the left-right direction than the upper opening of the through hole P3 of the locked portion P2. Therefore, the mounting portion 15 acts as a stopper to insert the through portion 16 into the through hole P3 and stop the locking claw 17 in a visible position (the "through position" shown in Figure 3). Therefore, the stopper allows the locking portion 13 to be positioned in the appropriate locking position, making it easy to lock the jig body 10 to the locking portion P2 of the steel column P1. 【0040】 As shown in Figure 3, the through portion 16 is inserted into the through hole P3 from above. Here, the through portion 16 is longer in the vertical direction than the through hole P3 of the locked portion P2. Therefore, the through portion 16 can be inserted into the through hole P3 up to the "through position". Therefore, since the locking claw 17 provided at the tip of the through-hole 16 is visible at the "through-hole position," the locked state can be easily confirmed. 【0041】 As shown in Figure 4, the pair of locking claws 17 are moved in a direction that separates them from each other (left-right direction) from the "penetration position" and positioned to lock onto the locked portion P2 (the "contactable position" shown in Figure 4). When the pair of locking claws 17 move toward the locked portion P2 (in the direction of arrow C), the upper end surface 17a of the locking claws 17 comes into contact with the lower end opening P2b of the locked portion P2, thereby allowing the steel column P1 to be lifted. In this way, the jig body 10 is locked to the steel column P1 by the locking claws 17 being hooked onto the locking portion P2. 【0042】 As shown in Figure 3, the width L1 of the locking claw 17 in the left-right direction is shorter than the width L2 of the through hole P3 in the left-right direction. Therefore, the locking claw 17 can be inserted into the locked portion P2 from above and below. In the "penetration position" shown in Figure 3, the pair of locking claws 17 are separated by a predetermined distance (L3). In the "contactable position" shown in Figure 4, the pair of locking claws 17 are separated by a predetermined distance (L4). Because the locking claws 17 protrude from the penetration portion 16 in the left-right direction, they move in a direction that separates them from the "penetration position" by the amount of this protrusion. 【0043】 <Retaining member> As shown in Figures 1, 2, 4, and 5, the holding member 20 is a T-shaped plate-like member that holds the jig body 10 attached to the outer surface of the steel column P1. The holding member 20 is attached to the locking portion 13 of the jig body 10 toward the outer surface of the steel column P1 so as to cover the locking portion 13 from the side. The holding member 20 holds the locking portion 13 in a state where it is locked to the locked portion P2. 【0044】 As shown in Figure 2, the holding member 20 includes a base portion 21 that covers the locking portion 13 from the side, fixing portions 22 provided at both left and right ends of the base portion 21, an upper projection 23 provided on the upper side of the base portion 21 facing the jig body 10, and a lower projection 24 provided on the lower side of the base portion 21 facing the jig body 10. 【0045】 As shown in Figure 2, the base portion 21 is a rectangular plate-like section that is elongated in the vertical direction and is attached to the jig body 10 so as to cover almost the entire surface of the locking portion 13. The base portion 21 covers the locking portion 13, which is locked to the locked portion P2, from the side toward the outer surface of the steel column P1. The fixing portion 22 is a roughly square plate-like portion that is used to attach the holding member 20 to the jig body 10. The fixing portion 22 is provided at both the left and right ends of the upper end of the base portion 21 and extends in a direction away from each other from the base portion 21. Fixing holes 22a are formed in the fixing portion 22, penetrating in opposing directions. 【0046】 The holding member 20 is attached to the jig body 10 by fixing a pair of fixing parts 22 to a pair of mounting parts 15 of the locking part 13. Specifically, with the locking claw 17 positioned in the "contactable position" shown in Figure 4, the mounting portion 15 (mounting hole 15a) and the fixing portion 22 (fixing hole 22a) are superimposed in opposing directions. Then, the fixing device 30 is inserted into the mounting hole 15a and the fixing hole 22a, and the fixing device 30 is rotated with a tool such as a wrench, thereby holding the locking claw 17 in the "contactable position". As a result, the movement of the locking claw 17 in the left-right direction relative to the locked portion P2 is restricted. 【0047】 In this way, the pair of locking portions 13 are held in a state where the predetermined distance (L4) at the "contactable position" shown in Figure 4 is longer than the predetermined distance (L3) at the "penetration position" shown in Figure 3. In other words, the base portion 21 and the fixing portion 22 of the holding member 20 hold the locking portion 13 with the locking claw 17 hooked onto the locking portion P2. 【0048】 As shown in Figures 2 and 4, the upper projection 23 is a rectangular parallelepiped that is elongated in the left-right direction and is a member for holding the locking claw 17 in a "contactable position". The upper projection 23 is provided on the base portion 21 so as to protrude inward (towards the outer surface of the steel column P1) from the surface of the base portion 21 that faces the jig body 10. Specifically, the upper projection 23 is positioned to be inserted between the pair of mounting parts 15 when the holding member 20 is attached to the jig body 10. The upper projection 23 is positioned to abut against the pair of mounting parts 15 from the side in the left-right direction. In this way, the upper projection 23 abuts against the pair of locking parts 13, thereby restricting the movement of the locking parts 13 in the left-right direction. 【0049】 As shown in Figures 2 and 4, the lower projection 24 is a rectangular parallelepiped that is elongated in the left-right direction and is a member for holding the locking claw 17 in a "contactable position". The lower projection 24 is provided on the base portion 21 so as to protrude inward (towards the outer surface of the steel column P1) from the surface of the base portion 21 that faces the jig body 10. Specifically, the lower projection 24 is positioned to be inserted between the pair of locking claws 17 when the holding member 20 is attached to the jig body 10. The lower projection 24 is positioned to abut against the pair of locking claws 17 from the side in the left-right direction. In this way, the lower projection 24 abuts against the pair of locking parts 13, thereby restricting the movement of the locking parts 13 in the left-right direction. 【0050】 The length (L5) of the upper projection 23 shown in Figure 4 is longer than the predetermined distance (L3) of the pair of locking parts 13 at the "through position" shown in Figure 3. In other words, the upper projection 23 can hold the pair of mounting parts 15 at the predetermined distance (L4) at the "contactable position" shown in Figure 4. Furthermore, the length (L5) of the lower projection 24 shown in Figure 4 is longer than the predetermined distance (L3) of the pair of locking parts 13 at the "through position" shown in Figure 3. In other words, the lower projection 24 can hold the pair of locking claws 17 at the predetermined distance (L4) at the "contactable position" shown in Figure 4. 【0051】 With the above configuration, the upper projection 23 and the lower projection 24 contact the locking portion 13 from the left and right directions, thereby holding the locking portion 13 in a locked state with the locked portion P2. In addition, the base portion 21 contacts the locking portion 13 from the opposite direction, thereby holding the locking portion 13 in a locked state with the locked portion P2. Therefore, the retaining member 20 can restrict the horizontal movement (left-right and opposing directions) of the locking portion 13. 【0052】 In the above configuration, a pair of through-holes 16 penetrate the locked portion P2 in the vertical direction, a pair of mounting portions 15 are provided at the base ends of the pair of through-holes 16, and a pair of locking claws 17 are provided at the tips of the pair of through-holes 16. The holding member 20 then locks the locking portions 13 to the locked portion P2 at two locations, above and below the locked portion P2. Therefore, the retaining member 20 maintains a predetermined distance (L4) between the mounting portion 15 to which the retaining member 20 is attached and the locking claw 17 to which the locked portion P2 is locked, thereby enabling a more secure hold on the locking portion 13. 【0053】 <Fixing fixture> As shown in Figures 1 and 2, the fixing device 30 detachably secures the retaining member 20 to the jig body 10. The fixing device 30 is, for example, a bolt and nut structure. The holding member 20 is fastened to the jig body 10 with a fixing device 30, thereby holding the locking portion 13 in a state where it is locked to the locked portion P2. 【0054】 <Method for lifting columns> Next, the method for lifting a column using the column lifting jig 1 will be explained based on Figures 3 to 5, 7, and 8. The method includes at least an "attachment step" of attaching the jig body 10 to the outer surface of the steel column P1 (Figure 7), a "holding step" of attaching the holding member 20 to the jig body 10 (Figure 8), and a "lifting step" of lifting the steel column P1 using a crane C1. A detailed explanation follows below. Regarding the lifting and installation of steel column P1, other steps will not be explained. 【0055】 In the "installation process," as shown in Figure 7, the worker locks the locking portion 13 of the jig body 10 onto the locking portion P2 of the erected steel column P1. Specifically, the worker inserts the pair of locking parts 13 into the pair of through holes P3 from above, positioning the pair of locking parts 13 in the "through position" shown in Figure 3. Then, the worker moves the pair of locking parts 13 in the left-right direction so that they are separated from each other, positioning them in the "contactable position" shown in Figure 4. Furthermore, the "possible contact position" is simply a position where, when the jig body 10 is lifted upward, the upper end surface 17a of the locking claw 17 can come into contact with the lower end opening P2b of the locked portion P2. It is not necessary for the upper end surface 17a and the lower end opening P2b to be in contact with each other at the "possible contact position". 【0056】 In the "holding process," as shown in Figure 8, after the "installation process," the worker attaches the holding member 20 to the jig body 10 so that the locking portion 13 is covered from the side toward the outer surface of the steel column P1 by the holding member 20. Specifically, the worker positions the holding member 20 so that the upper projection 23 and the lower projection 24 are inserted between the pair of locking parts 13 located in the "contactable position" shown in Figure 4. As shown in Figure 5, the worker attaches the holding member 20 to the locking parts 13 from the direction of arrow D so as to cover the jig body 10. The worker positions the holding member 20 so that the mounting hole 15a of the mounting part 15 and the fixing hole 22a of the fixing part 22 overlap in opposing directions, and fixes the jig body 10 and the holding member 20 by fastening the fixing device 30 with an impact wrench or the like. 【0057】 In this way, the worker temporarily fixes the position of the locking portion 13 by inserting the upper projection 23 and the lower projection 24 between the pair of locking portions 13. Then, the worker permanently fixes the position of the locking portion 13 by bolting the mounting portion 15 and the fixing portion 22 together with the fastener 30. Since the upper projection 23 is positioned near the mounting position of the mounting portion 15, it becomes easier to align the holding member 20 with respect to the mounting portion 15. Therefore, the holding member 20 can be easily attached to the jig body 10. Furthermore, since the lower projection 24 is positioned near the locking position of the locking claw 17, it becomes easier to maintain the engaged state of the locking claw 17 with respect to the locked portion P2. As a result, the holding member 20 can firmly maintain the locked state of the jig body 10. 【0058】 In the "lifting process," the worker operates the crane C1 and lifts the steel column P1 using the column lifting jig 1. At this time, the locking claw 17 is pulled upward while maintaining its locking position with the locking portion P2 at the "contactable position" shown in Figure 4. In other words, the holding member 20 holds the locking portion 13 in a locked position with the locking portion P2, allowing the crane C1 to lift the column lifting jig 1. 【0059】 With the above method of lifting the column, the column lifting jig 1 can be easily attached to and detached from the steel column P1 while suppressing interference between the column lifting jig 1 and the interference member provided on the steel column P1. Furthermore, since the holding member 20 can be attached after visually confirming the locking state of the locking part 13, the steel column P1 can be safely lifted. In this embodiment, the column suspension jig 1 is attached to the steel column P1 in an upright position, but it is not limited to this, and the column suspension jig 1 may also be attached to the steel column P1 in a horizontal position. 【0060】 <Other Embodiments> The column suspension jig of the present invention is not limited to the embodiments described above. For example, in this embodiment, as shown in Figure 1, the steel column P1 is fixed and lifted using only the column lifting jig 1. However, it is not limited to this, and a head member may also be used to hold the upper part of the steel column P1 from the side. In other words, the lower part of the steel column P1 may be fixed with the column lifting jig 1, and the upper part of the steel column P1 may be supported with the head member to perform the lifting work of the steel column P1. This suppresses the swaying of the column head and allows for the safe lifting of the steel column P1. 【0061】 Furthermore, in this embodiment, the locking portion 13 is movable in the left-right direction relative to the connecting portion 11 in accordance with the rotational movement of the link portion 12, but it is not limited to this. For example, the link portion 12 may be configured to have a rail recess provided on the connecting portion 11 and formed to extend in the left-right direction, and a rail protrusion provided on the locking portion 13 that engages with the rail recess in a slidable manner. In other words, the link portion 12 may be configured such that the rail protrusion slides horizontally relative to the rail recess, thereby connecting the locking portion 13 to the connecting portion 11 in a way that allows relative movement. 【0062】 Furthermore, in this embodiment, the upper projection 23 and the lower projection 24 are inserted between the pair of locking portions 13, but the invention is not limited to this configuration. For example, the holding member 20 may have a projection that protrudes inward from the base portion 21 at a position that overlaps with the locking portion 13 in the direction opposite to it. In this case, it is preferable that the locking portion 13 has an engagement recess for the projection to engage with, and that the projection abuts against the engagement recess. By doing so, the holding member 20 can hold the locking portion 13 in a state where it is locked to the locked portion P2. With the above configuration, the retaining member 20 can restrict the horizontal movement (left-right and opposing directions) of the locking portion 13. 【0063】 Furthermore, in this embodiment, the retaining member 20 has an upper projection 23 and a lower projection 24, but it may have only one of the projections. Alternatively, the locking portion 13 may be held in a locked state with the locked portion P2 by only fixing the fixing portion 22 to the mounting portion 15, without providing any protrusions. 【0064】 Furthermore, in this embodiment, the retaining member 20 is configured to be attached to the mounting portion 15 of the locking portion 13, but is not limited to this. For example, the retaining member 20 may be attached to the connecting portion 14, the through portion 16, or the locking claw 17 to hold the locking portion 13 in a locked state with the locked portion P2. Alternatively, the retaining member 20 may be attached to the connecting portion 11 or the link portion 12. 【0065】 Furthermore, in this embodiment, the jig body 10 is configured to engage a pair of locking parts 13 with the locked part P2, but it is not limited to this configuration, and it may also be configured to engage a single locking part 13 with the locked part P2. Alternatively, the locking portion 13 may be configured to eliminate the need for the link portion 12 and be directly connected to the connecting portion 11. 【0066】 Furthermore, in this embodiment, the jig body 10 is inserted from above the locked portion P2, but the invention is not limited to this configuration, and the jig body 10 may also be inserted from below the locked portion P2. By doing so, even if an interfering member is positioned above the locked portion P2, interference between the jig body 10 and the interfering member can be suppressed. 【0067】 Furthermore, although this embodiment uses a steel column P1 as an example for explanation, it is also suitable for suspending column-shaped objects with many protrusions (interfering members), such as utility poles and scaffolding supports. Moreover, it is not limited to column shapes, but is also suitable for suspending long objects that require vertical suspension, such as vertical furring strips, downpipes, vertical pipes, signs, vertical rails, and reinforcing bars. Additionally, by using it upside down, it can be used as an anchor for attaching fall prevention devices such as safety blocks and safety belts. 【0068】 The above embodiments mainly described the column lifting jig and column lifting method according to the present invention. However, the embodiments described above are merely examples to facilitate understanding of the present invention and do not limit it. The present invention can be modified and improved without departing from its spirit, and of course, equivalents thereof are included. [Explanation of Symbols] 【0069】 1. Column lifting jig 10. Jig body 11 Connecting part 11a base 11b Side 11c bottom 11ca First screw hole 11d Wire fixing part 12 Link section 12a First hole 12b First Screw 12c second hole 12d Second screw 13 Locking part 14 Connection part 14a Second screw hole 15 Mounting part 15a Mounting hole 16 Penetration 17 Locking claws 17a Top surface 20 Retaining member 21 Base section 22 Fixed part 22a Fixing hole 23 Upper protrusion (protrusion) 24 Lower protrusion (protrusion) 30 Fixtures P1 Steel column (column) P2 Locked part P2a Top opening P2b Bottom opening P3 through hole P4 Column Plate P5 bolt hole C1 Crane (Lifting device) C2 Crane connecting component

Claims

[Claim 1] A column lifting jig that is connected to a lifting device and used when lifting a column, A jig body connected to the lifting device and attached to the outer surface of the column, The column comprises a holding member that holds the jig body attached to the outer surface of the column, The jig body is, A connecting portion is positioned on one end of the jig body in the vertical direction and connected to the lifting device, The jig body has a locking portion that is positioned on the other end in the vertical direction and locks in the vertical direction with respect to a locking portion provided on the column, The aforementioned retaining member is The locking portion is attached to the jig body toward the outer surface of the column so as to cover it from the side, A column lifting jig characterized by holding the locking portion in a state where it is locked to the locked portion. [Claim 2] The aforementioned locking portion is The aforementioned locking portion has a through portion that penetrates it in the vertical direction, It has a locking claw provided at the tip of the through portion and which is hooked onto the locking portion, The column lifting jig according to claim 1, characterized in that the holding member holds the locking portion while the locking claw is hooked onto the locking portion. [Claim 3] The aforementioned retaining member is A base portion attached to the jig body, which covers the locking portion that is locked to the locking portion from the side toward the outer surface of the column, It has a projection that extends from the base portion toward the outer surface of the column, The column lifting jig according to claim 1 or 2, characterized in that the projection abuts against the locking portion to hold the locking portion in a locked state. [Claim 4] The column lifting jig according to claim 3, characterized in that the projection contacts the locking portion from the left and right directions which are perpendicular to the vertical direction and the opposing direction in which the column and the jig body face each other, thereby restricting the movement of the locking portion in the left and right directions. [Claim 5] The locking portion is provided in a pair at the lower end of the jig body. The pair of locking parts are arranged side by side in the left-right direction, The column lifting jig according to claim 4, characterized in that the projection is inserted between the pair of locking parts to restrict the movement of the pair of locking parts in the left-right direction. [Claim 6] The pair of locking parts are, A pair of through-parts that penetrate the locked portion in the vertical direction, A pair of mounting portions are provided at the base ends of the pair of through-holes for attaching the retaining member, It has a pair of locking claws provided at the tips of the pair of through-holes, which are hooked onto the locking portion, The aforementioned protrusion is An upper projection positioned between the pair of mounting portions, The column lifting jig according to claim 5, further comprising a lower projection positioned between the pair of locking claws. [Claim 7] The jig body further has a link portion that connects the connecting portion and the locking portion, The link portion rotates about an axis that extends along the opposing directions in which the column and the jig body face each other. The column lifting jig according to claim 1, characterized in that the locking portion moves in a direction perpendicular to the vertical direction and the opposing direction with respect to the connecting portion in accordance with the rotational movement of the link portion. [Claim 8] A method for lifting a column using the column lifting jig described in claim 1, The installation process involves attaching the jig body to the outer surface of the column, A holding step of attaching the holding member to the jig body, The process includes a lifting step of lifting the column using the aforementioned lifting device, In the mounting step, the locking portion of the jig body is locked to the locking portion of the column, A method for lifting a column, characterized in that, after the mounting step, the holding member is attached to the jig body such that the holding member covers the locking portion from the side toward the outer surface of the column.

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