JP2016023021A - Column lifting tool and method of using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a column lifting tool making it possible to safely and efficiently perform an operation of disposing a column by lifting the column by a crane at an erection position in a construction site of a building, or the like.SOLUTION: A column lifting tool 1 is a tool used when lifting a column 30 in a standing posture by a crane. The column lifting tool 1 includes a ring-shaped member 2, a plurality of upper ropes 3, and a plurality of lower ropes 4. The ring-shaped member 2 is disposed so as to surround a periphery of a vertical intermediate part of the column 30. One ends of the upper ropes 3 are connected to different circumferential locations of the ring-shaped member 2, and their respective other ends are hung on a hook 40 of the crane. The lower ropes 4 are connected to different circumferential locations of the ring-shaped member 2, and their respective other ends are connected to a lower end of the column 30.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a column-hanging jig used when a column is lifted and built by a crane in a construction site such as a two- or three-story prefabricated building such as a school, office, warehouse, or commercial facility, and a method of using the same. About.

  In the construction site of the prefabricated building, a pillar placed on the ground is raised by a crane, lifted, and installed in a building position. At that time, in the past, the suspension rope was hung directly on the pillar. That is, as shown in FIG. 17, one end of the suspension cable 50 is connected to the gusset plate provided below the center of the column 30 (in the case of the column 30 for a three-story building, the height of the second-floor floor beam). The gusset plate) 35 is coupled using a shackle 25, and the intermediate portion of the suspension cable 50 is wound more than two times slightly above the central portion of the column 30. Then, as shown in FIG. 18, the other end of the suspension cable 50 is hung on the hook 40 of the crane, and the pillar 30 is lifted by the crane.

JP 2012-193576 A

  17 and 18, the conventional lifting method of the column by the sling has to perform the work of winding the suspension cable 50 before lifting the column 30 and the work of removing the suspension cable 50 after the column installation, Work efficiency was bad. In particular, the work of removing the suspension cable 50 must be performed after removing one end of the suspension cable 50 from the gusset plate 35 at a height of several meters (about 3 meters) from the ground. It becomes work and is dangerous. Further, when the column 30 is lifted, as shown in FIG. 18, the column 30 is slightly inclined with the suspending rope winding position P as the center, so that the upper portion of the column 30 is the hook of the crane. There is a possibility that the suspended column 30 may come into contact with 40 and swing. Furthermore, it is necessary to correct the posture of the pillar 30 when installing the pillar 30 at the built-in position, and the work of installing the pillar 30 is difficult.

An object of the present invention is to provide a column suspension jig that can safely and efficiently perform an operation of lifting a column with a crane and installing it at a built-in position in a building construction site or the like.
Another object of the present invention is to provide a method of using a column suspension jig that can safely and quickly remove the column suspension jig from an installed column.
Another object of the present invention is to provide a method of using a column suspension jig that can remove the column suspension jig from the column even when it is difficult to pull the ring-shaped member upward with respect to the column.

  The column suspension jig according to the present invention is a jig used when lifting a column in a posture in which the column is raised, and a ring-shaped member surrounding the periphery of the middle portion in the vertical direction of the column and the ring-shaped member A plurality of upper suspension ropes, one end of which is coupled to a different circumferential direction and the other end of which is hooked to the hook of the crane, and one end of each of the ring-shaped members is coupled to each other in the circumferential direction. And a plurality of lower suspension ropes coupled to the lower end of the column.

  When lifting the column with a crane using the column suspension jig of this configuration, arrange the ring-shaped member so as to surround the periphery of the middle part in the vertical direction of the column, hang the other end of the upper suspension rope on the hook of the crane, And the said other end of several lower side suspension rope is couple | bonded with the lower end part of a pillar. In this state, the column is lifted by lifting the upper suspension rope with a crane. A ring-shaped member in which different portions in the circumferential direction are suspended by a plurality of upper suspension ropes has a horizontal posture. This horizontal ring-shaped member surrounds the periphery of the intermediate portion in the vertical direction of the column, and the horizontal movement of the intermediate portion in the vertical direction of the column is limited. Moreover, since the lower end part of the column is supported by a plurality of lower suspension ropes coupled to the ring-shaped members in different circumferential directions, the position of the lower end part of the column is stabilized without shaking on the horizontal plane. For these reasons, the suspended column is stably held in a substantially vertical posture. Even when the suspended pillar is lowered and installed at a predetermined built-in position, the pillar is held in the above-described stable posture, so that the pillar can be installed safely and easily.

  The following operations are performed when lifting a column using a column hanging jig. That is, before lifting, put the vertical middle part of the pillar in the ring-shaped member, hang the other end of the plurality of upper suspension ropes on the hook of the crane, and the other end of the plurality of lower suspension ropes To the bottom end of the column. The other end of the upper suspension line may remain on the crane hook. Moreover, after installing a pillar, the said other end of several lower suspension rope is removed from the lower end part of a pillar. Thereby, it is possible to remove the column suspension jig from the column by pulling the ring-shaped member upward with respect to the column by pulling up the upper suspension rope with the crane. The work efficiency is good because there is no need to wrap or remove the suspension rope around the pillar as in the conventional method of lifting the pillar by sling. Moreover, it is safe because it is not necessary to work at a high place to remove the suspension cable from the pillar.

In this invention, it is good to provide the opening-and-closing part which can go in and out of the said pillar in an open state in at least one place of the circumferential direction of the said ring-shaped member.
If the ring-shaped member is provided with the opening / closing portion, the vertical intermediate portion of the column can be easily put into the ring-shaped member through the opened / closed portion before the column is lifted. In addition, after the column is installed, the ring-shaped member is lowered to the ground or a height near the ground, so that the column can be taken out from the ring-shaped member through the open / close portion opened in the ring-shaped member. In other words, when the ring-shaped member is provided with an opening / closing part, the above-mentioned ring-shaped member is pulled upward to remove the column suspension jig from the pillar, and the column is removed from the pillar by pulling out the pillar from the opening / closing part of the ring-shaped member. The method of removing the column suspension jig can be used properly according to the situation. For example, the latter method may be selected when a member that protrudes in the lateral direction is attached to the column and it is difficult to pull the ring-shaped member upward with respect to the column.

For example, the ring-shaped member having the opening / closing portion may have the following configuration. That is, the ring-shaped member has two halved members divided in the circumferential direction, and one of the two divided parts dividing the ring-shaped member into the two halved members is the It is a pin coupling structure in which two halved members are rotatably connected to each other, and the other divided portion has a structure in which the two halved members are detachably connected to each other by a connecting means. In this case, the other divided portion becomes the opening / closing portion.
With this configuration, by removing the connecting means and separating the two halved members at the other divided part, the other divided part, which is an opening / closing part, is opened, and two halves are opened by the connecting means. By connecting the split members to each other, the other split portion that is the opening and closing portion is closed. Although this configuration is a simple mechanism, reliable operation can be expected.

The method of using the first column suspension jig of the present invention uses the column suspension jig according to any one of claims 1 to 3. The method of using the column suspension jig includes a step of attaching the column suspension jig to the column before construction, a step of lifting the column by the crane, and installing the column at a built-in position, and the built-in position. Removing the column suspension jig from the column installed in the column. In the process of removing the column suspension jig, after the coupling between the plurality of lower suspension ropes and the lower end portion of the column is removed, the ring suspension member is attached to the column suspension jig by the crane. The column suspension jig is removed from the column by lifting the ring-shaped member upward with respect to the column.
According to this method of using the column suspension jig, in the process of removing the column suspension jig, the ring-shaped member is moved upward with respect to the column only by removing the connection between the plurality of lower suspension ropes and the lower end of the column. It is possible to remove the column suspension jig from the column. The operation of removing the connection between the plurality of lower suspension ropes and the lower ends of the pillars is safe because it can be performed on the ground. In addition, the work of removing the connection between the plurality of lower suspension ropes and the lower end of the column can be performed at the time when the installation of the column is completed. It is not necessary and can quickly remove the column suspension jig.

The method for using the second column suspension jig of the present invention uses the column suspension jig according to claim 2 or claim 3. The method of using the column suspension jig includes a step of attaching the column suspension jig to the column before construction, a step of lifting the column by the crane, and installing the column at a built-in position, and the built-in position. Removing the column suspension jig from the column installed in the column. In the process of removing the column suspension jig, after the coupling between the plurality of lower suspension ropes and the lower end portion of the column is removed, the ring suspension member is connected to the ground or near the ground by the crane. The opening and closing portion of the ring-shaped member located at the ground or near the ground is opened, and the column is moved out of the ring-shaped member through the opening and closing portion. By removing the column suspension jig, the column suspension jig is removed from the column.
According to the method of using this column suspension jig, even if it is difficult to pull the ring-shaped member upward from the column due to the fact that a member that protrudes in the lateral direction is attached to the column, the column to column The hanging jig can be removed.

  The column suspension jig according to the present invention is a jig used when lifting a column in a posture in which the column is raised, and a ring-shaped member surrounding the periphery of the middle portion in the vertical direction of the column and the ring-shaped member A plurality of upper suspension ropes, one end of which is coupled to a different circumferential direction and the other end of which is hooked to the hook of the crane, and one end of each of the ring-shaped members is coupled to each other in the circumferential direction. Since it has multiple lower suspension ropes coupled to the lower end of the pillar, it is safe and efficient to lift the pillar placed on its side and install it in the building position at the building construction site, etc. Can be done.

  The method of using the first column suspension jig of the present invention uses the column suspension jig according to any one of claims 1 to 3, and the column suspension jig is applied to the column before construction. A step of attaching a tool, a step of lifting the column by the crane and installing the column at a built-in position, and a step of removing the column-hanging jig from the column installed at the built-in position. In the process of removing the jig, after the coupling between the plurality of lower suspension ropes and the lower end portion of the column is removed, the ring hanging member is made higher than the upper end of the column by the crane. The column suspension jig is removed from the installed column safely and quickly in order to remove the column suspension jig from the column by lifting the ring-shaped member upward with respect to the column. Can do.

  The method of using the second column suspension jig of the present invention uses the column suspension jig according to claim 2 or claim 3, and attaches the column suspension jig to the column before construction. A step of removing the column suspension jig, including a step of lifting the column by the crane and installing the column at a built-in position; and a step of removing the column suspension jig from the column installed at the built-in position. After removing the connection between the plurality of lower suspension ropes and the lower end of the pillar, the crane is lowered by the crane until the ring-shaped member is at a level near the ground or the ground, By opening the opening / closing portion of the ring-shaped member located at the height of the ground or near the ground, the column is removed from the ring-shaped member through the opening / closing portion in the open state, and the column is removed from the column. Remove the column suspension jig Even if it is difficult to pull out the ring-shaped member upward with respect to the pillar, it is possible to remove the hanging posts from pillar jig.

(A) is a front view which shows the state which attached the pillar hanging jig concerning one Embodiment of this invention to the pillar, (B) is the side view. It is the figure which added the top view of the pillar to the top view of the ring-shaped member of the pillar hanging jig. FIG. 3 is a view taken in the direction of arrow III in FIG. 2. FIG. 4 is a view taken along arrow IV in FIG. 2. It is VV sectional drawing of FIG. (A), (B) is an enlarged view which shows the mutually different state of the VI section of FIG. (A) is a top view of the other division | segmentation part of the two half member in the ring-shaped member, (B) is the front view. It is a top view when the opening-and-closing part of the ring-shaped member is an open state. It is a figure which shows the upper side suspension line or the lower side suspension line of the pillar suspension jig. It is a front view which shows the coupling | bond part of the ring-shaped member of the pillar hanging jig, an upper suspension rope, and a lower suspension rope. It is a front view which shows the coupling | bond part of the lower suspension rope and the lower end part of a pillar, and the coupling | bond part of a pillar and a foundation. It is a top view which shows the coupling | bond part of the lower suspension rope and the lower end part of a pillar, and the coupling | bond part of a pillar and a foundation. It is a top view of the example from which a ring-shaped member differs. It is explanatory drawing of the operation | work which raises a column using the same column hanging jig | tool, lifts, and installs. It is explanatory drawing of an example of the operation | work which removes the pillar suspension jig from a pillar. It is explanatory drawing of the example from which the operation | work which removes the same column hanging jig | tool from a pillar differs. It is explanatory drawing of the conventional lifting method of a pillar. It is a figure which shows the state at the time of column lifting by the conventional column lifting method.

An embodiment of the present invention will be described with reference to the drawings.
FIG. 1 shows a state in which a column suspension jig according to an embodiment of the present invention is attached to a column. The column suspension jig 1 includes a ring-shaped member 2 and two upper suspension lines 3 and a lower suspension line 4 each having one end coupled to the ring-shaped member 2. In the following description, the upper suspension cable 3 and the lower suspension cable 4 may be collectively referred to as “upper and lower suspension cables 3, 4”.

  The column 30 to which the column hanging jig 1 is applied is, for example, a steel column of a three-story prefabricated building. In this example, as shown in FIG. 2, one square steel pipe 31 and two lip grooves are provided. It is formed by combining the shape steel 32. In FIG. 1, a base plate 33 and a pair of left and right brace sheets 34 are joined to the lower end of a column 30 by welding. In addition, the height of the second floor beam of the pillar 30, the height of the third floor beam, and the height of the shed beam include a pair of left and right brace sheets 34 and a gusset plate 35 for connecting to each beam. Are joined by welding. Further, a stanchion 36 for roof work is attached to the upper end of the column 30. The total length of the pillar 30 for the three-story prefabricated building is about 12 to 13 m including the stanchion 36. The column 30 shown in FIGS. 1 and 2 is an example, and the column to which the column hanging jig 1 is applied is not limited to this.

  The ring-shaped member 2 of the column suspension jig 1 is shown in FIGS. The ring-shaped member 2 is made of a steel material such as a strip steel as a main material, and has a circular shape in a plane shape and a constant vertical width. As shown in FIG. 2, the inner diameter D of the ring-shaped member 2 is such that the pillar 30 in a standing posture is inserted with sufficient margin into the hollow portion 5 of the ring-shaped member 2 held horizontally, for example, about 400. ~ 500 mm. As shown in FIG. 5, a curing material 7 made of a resin material such as vinyl chloride or nitrile rubber is provided on the upper and lower ends of a steel material 6 such as a steel strip constituting the skeleton of the ring-shaped member 2 in order to prevent scratches on the pillar 30. It is covered.

  In FIG. 2 to FIG. 4, suspension plates 10, which are suspension rope coupling members for coupling the upper and lower suspension ropes 3, 4, are provided at two positions facing each other in the circumferential direction of the ring-shaped member 2. . The suspension plate 10 is bonded to the outer peripheral surface of the ring-shaped member 2 by welding, and the upper suspension rope coupling plate portion 11 is joined perpendicularly to the upper suspension rope coupling plate portion 11 and extends to the outer diameter side. An upper suspension rope coupling hole 13 is formed in a portion of the upper suspension rope coupling plate portion 11 that extends upward from the ring-shaped member 2 of the upper suspension rope coupling plate portion 11. A lower suspension cable coupling hole 14 is formed in the cable coupling plate portion 12.

  The ring-shaped member 2 of this embodiment is composed of two halved members 2A and 2B divided in the circumferential direction. One of the two divided portions 15 and 16 that divides the ring-shaped member 2 into two halved members 2A and 2B is configured such that the two divided members 2A and 2B rotate with respect to each other via a hinge 17. The other divided portion 16 has a structure in which the halved members 2A and 2B are connected to each other by a connecting means 18 so as to be detachable.

  Specifically, one of the divided portions 15 connected via the hinge 17 connects the opposing ends of the hinge plates 2Aa and 2Ba fixed to the outer peripheral surfaces of the halved members 2A and 2B with the hinge 17. doing. The hinge 17 has a pin coupling structure in which a pin is inserted into each pin hole formed at the opposite end of the hinge plates 2Aa and 2Ba and connected to each other so as to be rotatable. As a result, as shown in FIG. 8, the two half members 2 </ b> A and 2 </ b> B rotate about the hinge 17 as a fulcrum, and the other divided portion 16 connected by the insertion pin 19 opens and closes. That is, the other divided portion 16 is an opening / closing portion of the ring-shaped member 2.

  As shown in FIG. 6, the connecting means 18 includes an insertion pin 19 and cylindrical bodies 20A, 20B, and 20A that are pin insertion hole forming bodies. As shown in FIG. 7, the two cylindrical bodies 20A, 20A are arranged apart from each other in the vertical direction, and each is fixed to the outer-diameter bent end 2Ab of one half member 2A by welding. The cylindrical body 20B is disposed at a vertical height between the two cylindrical bodies 20A and 20A, and is fixed to the outer-diameter bent end 2Bb of the other half member 2B by welding. As shown in FIG. 6B, the half members 2A and 2B are connected to each other by inserting the insertion pin 19 through the cylindrical bodies 20A, 20B and 20A whose centers are aligned with each other. At the upper end of the insertion pin 19, an annular knob 19a having a width dimension larger than the inner diameter of the cylindrical bodies 20A, 20B, 20A is provided.

  Drop prevention device mounting rings 21 and 22 are provided on the outer peripheral surface of the upper cylindrical body 20A and the lower end portion of the insertion pin 19, respectively. These fall prevention device attaching rings 21 and 22 are for attaching both ends of the fall prevention device 23 in order to prevent the insertion pin 19 inserted through the cylindrical bodies 20A, 20A, and 20A from coming off. The fall prevention tool 23 is provided with stoppers 23b that can be attached to the fall prevention tool attachment rings 21 and 22 at both ends of a flexible string-like body 23a such as a wire. Can be used.

  The fall prevention device 23 may attach the stoppers 23b at both ends to the fall prevention device attaching rings 21 and 22 only when the insertion pin 19 is inserted into the cylindrical bodies 20A, 20B and 20A, respectively. Also good. That is, as shown in FIG. 6A, when the insertion pin 19 is not inserted through the cylindrical bodies 20A, 20B, 20A, the stoppers 23b on both sides of the fall prevention tool 23 are respectively attached to the fall prevention tools of the cylindrical body 20A. After attaching the ring 21 and the annular knob 19a of the insertion pin 19 and inserting the insertion pin 19 into the cylindrical bodies 20A, 20B, 20A, as shown in FIG. 6B, the annular knob 19a of the insertion pin 19 is inserted. Reattach the stopper 23b attached to the fall prevention tool attachment ring 22. Thereby, loss of the insertion pin 19 can be prevented.

  The upper suspension cable 3 and the lower suspension cable 4 are wire ropes as shown in FIG. 9, for example, and have eyes 3a, 3b, 4a, 4b at both ends, respectively. When the length of the pillar 30 to be applied is about 12 to 13 m, the length of the upper suspension line 3 is about 4 m, and the length of the lower suspension line 4 is about 9 m. The upper suspension rope 3 and the lower suspension rope 4 may be string-like bodies other than the wire rope.

  As shown in FIG. 10, the lower end of the upper suspension cable 3 is coupled to the upper suspension cable coupling plate portion 11 of the suspension plate 10 of the ring-shaped member 2 through a shackle 25. The connecting method is such that the U-shaped main body 25a of the shackle 25 is passed through the eye 3a of the upper suspension rope 3, and the pin 25b of the shackle 25 is inserted into the upper suspension rope connection hole 13 formed in the upper suspension rope connection plate portion 11. And do it. Similarly, the upper end of the lower suspension cable 4 is connected to the lower suspension cable connection plate 12 of the suspension plate 10 via a shackle 25. The connecting method is such that the lower suspension rope connection hole 14 formed in the lower suspension rope connection plate portion 12 of the suspension plate 10 is passed through the U-shaped main body 25a of the shackle 25 through the eye 4a of the lower suspension rope 4. This is done by inserting the pin 25b of the shackle 25.

A method will be described in which the pillar 30 placed on the ground is raised by a crane using the pillar suspension jig 1, lifted, and installed at the built-in position.
<The process of attaching the column hanging jig to the column>
First, as shown in FIG. 8, the divided portion 16 that is the opening and closing portion of the ring-shaped member 2 is opened, and the vertically intermediate portion of the column 30 placed on its side is passed through the divided portion 16 in the opened state. Into the hollow part 5 of Next, the divided portion 16 of the ring-shaped member 2 is closed, and the insertion pins 19 are inserted into the cylindrical bodies 20A, 20B, 20A to connect the two half members 2A, 2B. Thereafter, the stoppers 23b at both ends of the fall prevention tool 23 are attached to the fall prevention tool mounting rings 21 and 22, so that the insertion pin 19 does not come off from the cylindrical bodies 20A, 20B, 20A.

  Next, as shown in FIGS. 11 and 12, the lower end of the lower suspension rope 4 is coupled to the brace sheet 34 provided at the lower end portion of the column 30 via the shackle 25. The connecting method is performed by passing the U-shaped main body 25a of the shackle 25 through the eye 4b of the lower suspension rope 4 and inserting the pin 25b of the shackle 25 into the hole 34a formed in the brace sheet 34. 11 and 12 show a state in which the pillar 30 is built at the built-in position on the foundation 41, but the lower suspension rope 4 can also be used when the pillar 30 is laid down before being built. The brace sheet 34 has the same coupling structure.

  Then, the eye 3b at the upper end of the upper suspension rope 3 is hung on the hook 40 (FIG. 14) of the crane. Prior to the operation of inserting the middle portion of the column 30 in the hollow portion 5 of the ring-shaped member 2 and the operation of joining the lower end of the lower suspension rope 4 to the brace sheet 34, the upper eye of the upper suspension rope 3 3b may be hung on the hook 40 of the crane. FIG. 14A shows a state where each of the above operations is completed.

<The process of lifting and installing the pillar>
When the crane hook 40 is raised in the state shown in FIG. 14A, the column 30 stands up while the middle part of the column 30 is supported by the ring-shaped member 2 as shown in FIG. 14B. When the hook 40 is further raised, the lower end of the pillar 30 is pulled up by the lower suspension rope 4 and the pillar 30 is lifted as shown in FIG. The ring-shaped member 2 in which two places opposite to each other are suspended by the two upper suspension ropes 3 is in a horizontal posture. The ring-shaped member 2 in the horizontal posture surrounds the periphery of the intermediate portion in the vertical direction of the column 30 and the horizontal movement of the intermediate portion in the vertical direction is limited. Moreover, since the brace sheet | seat 34 provided in the both sides of the lower end part of the pillar 30 is supported by the two lower suspension ropes 4, the position of the lower end part of the pillar 30 is stabilized without shaking on a horizontal plane. For these reasons, the suspended column 30 is stably held in a substantially vertical posture.

  After the suspended pillar 30 is moved to above the building position on the foundation 41, the hook 30 is lowered and the pillar 30 is installed at the building position as shown in FIG. At this time, since the column 30 is lowered while being held in a substantially vertical posture, the column 30 can be installed safely and easily.

  After the pillar 30 is installed, the lower end of the pillar 30 is fixed to the foundation 41 as shown in FIGS. That is, an anchor bolt 42 protruding upward from the base top end is inserted into a through hole (not shown) provided in the base plate 33 of the pillar 30, and a nut 43 is inserted into a portion of the anchor bolt 42 protruding from the base plate 33. It is fixed by screwing.

<The process of removing the column hanging jig from the column (first removal method)>
Thereafter, as shown in FIG. 15A, each lower suspension rope 4 is removed from the brace sheet 34 of the pillar 30 and the crane hook 40 is raised as shown in FIG. Then, the ring-shaped member 2 is pulled upward to remove the column suspension jig 1 from the column 30. With this method of removing the column suspension jig 1, it is safe because the operator only needs to remove the lower suspension rope 4 from the brace sheet 34 on the ground and does not have to work at a high place.

<The process of removing the column suspension jig from the column (second removal method)>
FIG. 16 shows a method of removing the column suspension jig 1 different from the above. As shown in FIG. 6A, the column suspension jig 1 is lowered until the ring-shaped member 2 reaches the ground level or near the ground, and the divided portion 16 that is an opening / closing portion of the ring-shaped member 2 is opened (see FIG. 8), the column suspension jig 1 is removed from the column 30 by removing the column 30 from the hollow portion 5 (FIG. 8) of the ring-shaped member 2 through the open divided portion 16. This method of removing the pole-hanging jig 1 is also safe because the operator only has to work on the ground and does not have to work at a high place.

The above two methods for removing the column-hanging jig may be appropriately used depending on the form of the column 30 or the situation at the work site. For example, with respect to a column (not shown) provided with a member that protrudes more in the lateral direction than the gusset plate 35 or stanchion 36 provided on the column 30 shown in FIG. Since it is difficult to pull the ring-shaped member 2 upward, the removal method shown in FIG. 16 is adopted.

  Regardless of which of the above two methods for removing the column suspension jig is employed, when the column 30 is raised, lifted and installed using the column suspension jig 1 of the present invention, the conventional method for lifting the column by slinging is used. Thus, work efficiency is good because the work of wrapping or removing the suspension cable around the pillar is unnecessary. In addition, it is safe because it is not necessary to work at high places.

  In the above-described embodiment, the number of the upper and lower suspension ropes 3 and 4 is two, but may be three or more. In that case, one end of each of the upper and lower suspension ropes 3 and 4 is coupled to the ring-shaped member 2 at different locations in the circumferential direction.

  Moreover, in the said embodiment, although the planar shape of the ring-shaped member 2 was circular, for example, as shown in FIG. 13, the planar shape of the ring-shaped member 2 may be a square or other shapes. Also good. The ring-shaped member 2 having a quadrangular planar shape shown in FIG. 13 is also composed of two halved members 2A and 2B, and one divided portion 15 rotates both halved members 2A and 2B with respect to each other via a hinge 17. The other divided portion 16 is a structure in which the two split members 2A and 2B are detachably connected by the connecting means 18, and the other divided portion 16 serves as an opening / closing portion. .

  The ring-shaped member 2 does not need to be provided with an opening / closing part that allows the column 30 to enter and exit. In that case, the method of removing the column suspension jig from the column shown in FIG. 15 can be implemented, but the method of removing the column suspension jig from the column shown in FIG. 16 cannot be implemented. When the ring-shaped member 2 is provided with the dividing portion 16 serving as an opening / closing portion that allows the column 30 to enter and exit, the process of removing the column suspension jig from the column shown in FIG. In this case, it is not necessary to lower the column hanging jig 1 until the ring-shaped member 2 reaches the ground level or near the ground level, and the working efficiency can be further improved.

DESCRIPTION OF SYMBOLS 1 ... Column suspension jig 2 ... Ring-shaped member 2A, 2B ... Half member 3 ... Upper suspension rope 4 ... Lower suspension rope 15 ... One division part 16 ... The other division part (opening-closing part)
17 ... Hinges (pin coupling structure)
18 ... connecting means 30 ... pillar 40 ... hook 41 ... basic

Claims (5)

  It is a jig used when lifting in a posture in which a pillar is raised with a crane, and one end of each ring-shaped member surrounding the periphery of the middle part in the vertical direction of the pillar and a different circumferential direction of the ring-shaped member A plurality of upper suspension ropes that are coupled to each other and hooked to the hook of the crane, and a plurality of one ends that are coupled to different locations in the circumferential direction of the ring-shaped member and the other end is coupled to the lower end of the column. A pillar suspension jig comprising a lower suspension rope of a book.   The column suspension jig according to claim 1, wherein an opening / closing portion capable of entering and exiting the column in an open state is provided at least in one circumferential direction of the ring-shaped member.   3. The pillar-hanging jig according to claim 2, wherein the ring-shaped member has two halved members divided in the circumferential direction, and the two divided portions divide the ring-shaped member into the two halved members. One of the divided portions has a pin coupling structure in which the two halved members are rotatably connected to each other, and the other divided portion is engaged with and disengaged from each other by the connecting means. A pillar-hanging jig that has a structure that is connected so that the other divided portion serves as the opening / closing portion. A method of using the column suspension jig according to any one of claims 1 to 3,
The process of attaching the pillar suspension jig to the pillar before construction, the process of lifting the pillar by the crane and installing it at the built-in position, and the pillar suspension from the pillar installed at the built-in position Removing the jig,
In the process of removing the column suspension jig, after the coupling between the plurality of lower suspension ropes and the lower end portion of the column is removed, the ring suspension member is attached to the column suspension jig by the crane. A method of using a column suspension jig that removes the column suspension jig from the column by raising the height to a height that is higher than that and pulling the ring-shaped member upward with respect to the column. A method of using the column suspension jig according to claim 2 or 3,
The process of attaching the pillar suspension jig to the pillar before construction, the process of lifting the pillar by the crane and installing it at the built-in position, and the pillar suspension from the pillar installed at the built-in position Removing the jig,
In the process of removing the column suspension jig, after the coupling between the plurality of lower suspension ropes and the lower end portion of the column is removed, the ring suspension member is connected to the ground or near the ground by the crane. The opening and closing portion of the ring-shaped member located at the ground or near the ground is opened, and the column is moved out of the ring-shaped member through the opening and closing portion. A method of using a column suspension jig that removes the column suspension jig from the column by removing the column suspension jig.

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