JP6370167B2 - Raising tool and raising method - Google Patents

Description

  The present invention relates to a raising tool and a raising method for raising a concrete structure at a construction site or the like.

  As a concrete structure, for example, a precast concrete column (hereinafter referred to as a PC column) manufactured by precasting in a factory or the like in advance is known. After the PC pillar is manufactured in the factory, it is carried to the site by a truck or the like. Further, since the PC pillars are loaded on the truck bed in a state where they are laid down in the horizontal direction, when the PC pillar is lowered from the truck bed, it is necessary to raise the PC pillar with a crane or the like. In such a case, various techniques for raising a concrete structure such as a PC pillar are known.

  Japanese Patent Application Laid-Open No. 2006-342554 discloses a column pedestal having a wheel base at a lower portion and a support member having a support girder for supporting one end of the column and extending obliquely at the upper portion of the column base. The ingredients are listed. In this raising tool, the column is raised by moving the column base horizontally with the wheels while raising the column with a crane or the like while supporting one end of the column on the support beam.

  Japanese Patent Application Laid-Open No. 2005-139702 describes a column pedestal having a mounting surface on which one end of a column is mounted and a wheel. The mounting surface is inclined with respect to the grounding surface of the column pedestal. doing. In this column cradle, it is possible to raise the column by lifting the column with a crane or the like while moving the column cradle horizontally with wheels while one end of the column is mounted on the mounting surface. Yes.

JP 2006-342554 A JP 2005-139702 A

  However, the raising tool as described above raises the column by moving the wheel in the horizontal direction with one end of the column mounted on the mounting surface, so that the space for moving the wheel in the horizontal direction. Is required. For this reason, it is difficult to raise a concrete structure such as a pillar in a state where it is loaded on a truck or the like, and an operation of once dropping the concrete structure from the truck or the like occurs. Therefore, a space for placing the lowered concrete structure is also required. Thus, in the raising tool mentioned above, there exists a problem that it is difficult to raise a concrete structure in a limited space.

  An object of the present invention is to provide a raising tool and a raising method that can easily raise a concrete structure in a limited space.

The raising device according to the present invention is a raising device used when raising a lying concrete structure on a predetermined surface, and is formed on a base portion and one end surface of the concrete structure fixed to the base portion. and a rod portion to be inserted into to holes, concrete structure, in a state where the rod-shaped portion into the hole is inserted, Ri Okiaga about an axis extending base portion as the horizontal direction, the base portion A portion that contacts one end surface of the concrete structure when the rod-shaped portion is inserted into the hole, and a portion that forms a gap between the one end surface when the rod-shaped portion is inserted into the hole. Features.

  The raising tool according to the present invention includes a rod-like portion that is fixed to the base portion and is inserted into a hole formed in one end surface of the concrete structure, and is raised when the rod-like portion is inserted into the hole. A tool is attached to one end face of the concrete structure. Therefore, it is possible to easily attach the raising tool to the concrete structure simply by inserting the rod-like portion into the hole. In addition, in a state where the raising tool is attached to one end surface of the concrete structure, the concrete structure rises around an axis extending in the horizontal direction through the base portion. Therefore, the concrete structure can be erected while suppressing the movement of the erection tool in the horizontal direction as much as possible, and therefore the space for moving the erection tool in the horizontal direction can be minimized. Also, since the concrete structure is erected around the horizontal axis, it is not necessary to unload the concrete structure from the truck bed, and the concrete structure can be erected with the concrete structure on the bed. It becomes. Therefore, a space for placing the lowered concrete structure becomes unnecessary. Therefore, the concrete structure can be easily raised in a limited space. Furthermore, since the raising tool which concerns on this invention is a structure provided with a base part and a rod-shaped part, it is possible to simplify a structure.

Further, by providing a portion where a gap is formed between one end face, a vertical raised member so that the gap between the concrete structure and the base portion when mounted to a concrete structure is formed. The gap provides a portion where the concrete structure and the base portion do not come into contact with each other, so that the concrete structure can be hardly damaged when the concrete structure is raised. For example, in the case of a concrete structure in which a tile is attached to the surface, it is possible to prevent the tile from coming into contact with the erection tool by providing the gap at the location of the base portion facing the tile. Therefore, it is possible to avoid a situation where the tile is peeled off or broken. Further, when the concrete structure is a column, a load is not applied to the corner of the column even at the end of the concrete surface, so that it is possible to avoid a situation where the corner is damaged.

  Further, the base portion may have a curved surface that curves upward from the lower end when the rod-like portion is inserted into the hole of the laid concrete structure. In this case, it is possible to raise the concrete structure smoothly by raising the concrete structure along the curved surface that curves upward from the lower end. When the base portion has such a curved surface, the concrete structure can be raised more easily around the axis extending in the horizontal direction.

  The raising method according to the present invention includes a step of inserting a rod-like portion into a hole of a concrete structure in the raising method performed using the raising device, and a base portion in a state where the rod-like portion is inserted into the hole. And a step of raising the concrete structure around an axis extending in the horizontal direction.

  In the raising method according to the present invention, in the step of inserting the rod-shaped portion, the rod-shaped portion fixed to the base portion is inserted into a hole formed in the concrete structure, so that the raising tool is one of the concrete structures. Attached to the end face. Therefore, the raising tool can be easily attached to the concrete structure simply by inserting the rod-like portion into the hole. Further, the concrete structure rises around an axis passing through the base portion with the rod-shaped portion inserted in the hole of the concrete structure. Therefore, the concrete structure can be erected while suppressing the movement of the erection tool in the horizontal direction as much as possible, and therefore the space for moving the erection tool in the horizontal direction can be minimized. Also, since the concrete structure is erected around the horizontal axis, it is not necessary to unload the concrete structure from the truck bed, and the concrete structure can be erected with the concrete structure on the bed. It becomes. Therefore, a space for placing the lowered concrete structure becomes unnecessary. Therefore, the concrete structure can be easily raised in a limited space.

  ADVANTAGE OF THE INVENTION According to this invention, the raising tool and the raising method which can raise a concrete structure easily in a limited space can be provided.

(A) is a figure which shows the state by which the PC pillar was laid on the loading platform of a truck, (b) is a figure which shows the state by which the PC pillar was raised up. (A) is a top view which shows the raising tool concerning this embodiment, (b) is the BB sectional drawing of Fig.2 (a). It is a perspective view which shows the state in which the raising tool of FIG. 2 was attached to the end of PC pillar. It is the side view to which the end and base part of PC pillar were expanded. (A) is a perspective view which shows the state which raises PC pillar, (b) is a side view which shows the state which raises PC pillar. (A) is a perspective view which shows the state which raised the PC pillar, (b) is a side view which shows the state which raised the PC pillar. (A) is a perspective view which shows the state which has lifted PC pillar, (b) is a side view which shows the state which has lifted PC pillar.

  Hereinafter, an embodiment of a raising tool and a raising method according to the present invention will be described in detail with reference to the drawings. In the following description, the same or corresponding elements are denoted by the same reference numerals, and redundant description is omitted.

  As shown in FIGS. 1 to 3, the raising tool 1 according to the present embodiment is used when raising a concrete structure lying on a loading platform N of a truck T. Below, the example in case this concrete structure is the PC pillar 10 is demonstrated. The PC pillar 10 is a concrete pillar manufactured in advance at a factory, and is placed on the loading platform N of the truck T and transported to the construction site. A plurality of holes 11 into which main bars of other columns are inserted are formed in one end (one end surface) 10 </ b> A in the longitudinal direction of the PC column 10, and from the other end (other end surface) 10 </ b> B in the longitudinal direction of the PC column 10. The plurality of reinforcing bars 12 embedded in the PC pillar 10 protrude.

  The cross section when the PC pillar 10 is cut along a plane orthogonal to the longitudinal direction of the PC pillar 10 is rectangular. At one end 10A of the PC pillar 10, circular holes 11 for inserting reinforcing bars are provided at equal intervals in 24 places, and the 24 holes 11 have a square shape of 7 in the vertical direction and 7 in the horizontal direction. It is arranged to become. The shape and size of the hole 11 can be changed as appropriate. Moreover, since the shape and size of the hole 11 differ depending on the site, the hole 11 having a different shape and size is created depending on the site. A tile 13 that covers the entire side surface is driven into one side surface of the PC pillar 10 extending in the longitudinal direction. Such a PC pillar 10 has the upright tool 1 attached to a hole 11 formed at one end 10A of the PC pillar 10, and a sling around which a wire rope is wound is performed around the PC pillar 10 and is lifted by a crane or other hoisting machine. Wakes up.

  The raising tool 1 includes a base portion 2 and an attachment portion 3 fixed to the base portion 2 and attached to one end 10 </ b> A of the PC pillar 10. The base part 2 is wooden. In addition, since the Apiton material is used as the material of the base portion 2, the strength of the base portion 2 is increased. The base part 2 has a substantially rectangular parallelepiped shape. Two curved surfaces 2b are provided at both ends of the first flat surface 2a extending in the longitudinal direction of the base portion 2.

  Each curved surface 2b is provided at both ends of the first plane 2a in the longitudinal direction. Each curved surface 2b has an arc shape that is continuous with the first plane 2a. A rectangular second plane 2 c extending in the longitudinal direction of the base portion 2 is provided on the opposite side of the base portion 2 from the first plane 2 a. At both ends in the longitudinal direction of the second plane 2c, recesses 2j that are stepped down from the second plane 2c are provided.

  The base portion 2 is provided with two holes 2d for fixing the attachment portion 3 at two locations. The hole 2d penetrates from the first plane 2a to the second plane 2c. Each hole 2d passes through the center G of the second plane 2c and is symmetric with respect to a center line L extending in parallel with the end 2f located at both ends in the longitudinal direction of the second plane 2c. Is arranged. Moreover, the seat carving 2g is provided in the 1st plane 2a side and the 2nd plane 2c side of each hole 2d.

  The mounting portion 3 includes a steel pipe 3a fixed in the hole 2d, a rod-like portion 3b inserted into the steel tube 3a, and a tightening portion 3c that fastens the rod-like portion 3b with a seat carving 2g. The steel pipe 3a is provided to insert the rod-like portion 3b and reinforce the hole portion 2d. Moreover, the rod-shaped part 3b is a cross-sectionally circular bolt inserted through the steel pipe 3a, and the tightening part 3c is a nut screwed into the bolt.

  Since the hole 2d is provided with the seat carving 2g, the fastening portion 3c does not protrude from the first plane 2a or the second plane 2c of the base portion 2. The rod-shaped portion 3b does not protrude from the first plane 2a, but protrudes from the second plane 2c by a predetermined length. Moreover, the diameter of the rod-shaped part 3b is shorter than the diameter of the hole 11 formed in the one end 10A of the PC pillar 10. Therefore, it is possible to easily insert the rod-shaped portion 3 b into the hole 11 and pull out the rod-shaped portion 3 b from the hole 11. Further, since the interval between the rod-shaped portions 3b (the interval between the hole portions 2d) is an integral multiple of the interval between the holes 11, the two rod-shaped portions 3b can be simultaneously inserted into the two holes 11. ing.

  The raising tool 1 configured as described above is attached to the PC pillar 10 by inserting the two rod-like portions 3 b into the two holes 11. Specifically, a single piece is formed so that two rod-like portions 3b are inserted into the hole 11 located at the upper left of the one end 10A and the hole 11 located at the lower left of the one end 10A and the base portion 2 extends vertically. The raising tool 1 is attached to the left side of the one end 10A. Also, one upright so that the two rod-like portions 3b are inserted into the hole 11 located at the upper right of the one end 10A and the hole 11 located at the lower right of the one end 10A, and the base portion 2 extends vertically. The tool 1 is attached to the right side of the one end 10A.

  As shown in FIG. 4, the base portion 2 is formed with a recess 2j that is one step down from the second plane 2c. Therefore, in a state where the raising tool 1 is attached to the PC pillar 10, a gap S is formed between the base portion 2 and the tile 13 so that the base portion 2 and the tile 13 do not come into contact with each other. Accordingly, the second plane 2c corresponds to a portion that contacts the one end 10A of the PC pillar 10 when the rod-shaped portion 3b is inserted into the hole 11, and the recess 2j is formed when the rod-shaped portion 3b is inserted into the hole 11. Corresponds to a portion where a gap S is formed between the one end 10A. Further, in a state where the raising tool 1 is attached to the PC pillar 10, the curved surface 2 b of the base portion 2 is curved upward from the lower end 2 h as the distance from the PC pillar 10 increases.

  Next, a method for raising the PC pillar 10 lying on the loading platform N of the truck T using the raising tool 1 will be described. As shown in FIG. 5, a plurality of sleepers M extending in the width direction of the track T are provided on the loading platform N, and the PC pillars 10 are placed on these sleepers M. Since these sleepers M function as spacers that form a gap between the upper surface of the loading platform N and the lying PC pillar 10, one end 10 </ b> A of the PC pillar 10 is in a state of floating from the loading platform N. The PC pillar 10 is laid on the sleeper M so that one side surface on which the tiles 13 are formed faces downward.

  First, as shown in FIG. 3, by inserting two rod-like portions 3b into the upper left hole 11 and the lower left hole 11 at one end 10A of the PC pillar 10, one upright tool is provided on the left side of the one end 10A. 1 is attached. Then, by inserting the two rod-like portions 3b into the upper right hole 11 and the lower right hole 11 at the one end 10A of the PC pillar 10, another upright tool 1 is attached to the right side of the one end 10A (the rod-like portion 3b is attached). Step of inserting).

  After attaching the two erection tools 1 to one end 10A of the PC pillar 10 so as to form a pair of left and right, a sling around which a wire rope is wound around the PC pillar 10 is performed. This staking is performed on the other end 10B side of the PC pillar 10. Then, as shown in FIGS. 5A and 5B, the protective mat 4 is laid on the loading platform N and below the one end 10 </ b> A of the PC pillar 10. The upper surface of the protective mat 4 corresponds to a predetermined surface used when the PC pillar 10 laid down is raised.

  When the other end 10B side of the PC pillar 10 is pulled up with a lifting machine after staking the PC pillar 10, the PC pillar 10 is gradually raised. At this time, while the curved surface 2b of the base portion 2 is in smooth contact with the protective mat 4, the PC pillar 10 is raised up smoothly around an axis extending in the horizontal direction through the base portion 2 (PC pillar). 10). 6 (a) and 6 (b), the PC column 10 is erected in the vertical direction with the first plane 2a of the base portion 2 in contact with the upper surface of the protective mat 4. It becomes. As shown in FIG. 7A and FIG. 7B, when the upright PC pillar 10 is further lifted by a lifting machine, the PC pillar 10 is grounded, and the PC pillar 10 is lifted from the track T. It becomes possible.

  As described above, in the raising tool 1 and the raising method according to the present embodiment, the rod-like portion 3b that is fixed to the base portion 2 and is inserted into the hole 11 formed in the one end 10A of the PC pillar 10 is provided. When the portion 3 b is inserted into the hole 11, the raising tool 1 is attached to one end 10 </ b> A of the PC pillar 10. Therefore, the raising tool 1 can be easily attached to the PC pillar 10 simply by inserting the rod-shaped portion 3 b into the hole 11.

  Further, in a state where the raising tool 1 is attached to the one end 10 </ b> A of the PC pillar 10, the PC pillar 10 rises around an axis extending in the horizontal direction through the base portion 2. Therefore, since it becomes possible to raise the PC pillar 10 while suppressing the movement of the raising tool 1 in the horizontal direction as much as possible, the space for moving the raising tool 1 in the horizontal direction can be made as small as possible. Further, since the PC pillar 10 is raised about the axis extending in the horizontal direction, it is not necessary to lower the PC pillar 10 from the loading platform N of the truck T, and the PC pillar 10 is raised with the PC pillar 10 placed on the loading platform N. It becomes possible. Therefore, a space for placing the lowered PC pillar 10 becomes unnecessary. Therefore, the PC pillar 10 can be easily raised up in a limited space. Furthermore, since the raising tool 1 is the structure provided with the base part 2 and the rod-shaped part 3b, it is possible to simplify a structure.

  The base portion 2 includes a second plane 2c that contacts one end 10A of the PC pillar 10 when the rod-shaped portion 3b is inserted into the hole 11, and one end 10A when the rod-shaped portion 3b is inserted into the hole 11. And a recess 2j that forms a gap S therebetween. By providing the recess 2j in this way, a gap S is formed between the PC pillar 10 and the base portion 2 when the rod-like portion 3b is inserted into the hole 11. Therefore, since the portion where the PC pillar 10 and the base portion 2 do not contact with each other is provided, the PC pillar 10 can be made less likely to be damaged when the PC pillar 10 is raised about the axis passing through the base portion 2.

  Further, a tile 13 is attached to the surface of the PC pillar 10. And the recessed part 2j is provided in the location of the base part 2 facing the tile 13, and the clearance gap S is formed between the tile 13 and the base part 2. FIG. Therefore, since the tile 13 can be prevented from coming into contact with the raising tool 1 by the gap S, it is possible to avoid a situation in which the tile 13 is peeled off or damaged when the PC pillar 10 is raised.

  Moreover, the base part 2 is provided with the curved surface 2b which curves upward from the lower end 2h when the rod-shaped part 3b is inserted in the hole 11 of the PC pillar 10 laid down. Therefore, by raising the PC pillar 10 along the curved surface 2b that curves upward from the lower end 2h, the PC pillar 10 can be raised smoothly. Therefore, the PC pillar 10 can be raised more easily with the base portion 2 as an axis.

  Further, in the raising tool 1, the hole 11 into which the main bar of the column is inserted is used as an insertion hole for the rod-like portion 3 b, so that the main bar insertion hole 11 is effective as a hole for raising the PC column 10. Can be used.

  The present invention is not limited to the above-described embodiment, and various modifications as described below are possible without departing from the gist of the present invention.

  For example, in the above embodiment, the base portion 2 to which the two rod-like portions 3b are fixed has been described. However, the number of rod-like portions to be fixed to the base portion is not limited to two and can be changed as appropriate. Moreover, the space | interval in which a rod-shaped part is provided can be suitably changed according to the space | interval of the hole of a pillar. Furthermore, the diameter of the rod-shaped part can be appropriately changed according to the diameter of the hole of the column.

  Moreover, in the said embodiment, although the rod-shaped part 3b was a volt | bolt and the clamp | tightening part 3c was a nut, things other than a volt | bolt can also be used as a rod-shaped part. For example, instead of the rod-shaped portion 3b that is a bolt, a wooden rod-shaped portion fixed to the base portion with an adhesive or the like may be used. Furthermore, the material of the rod-shaped portion is not limited to metal or wood, and for example, a rod-shaped portion made of resin may be adopted.

  In the said embodiment, although the wooden base part 2 was used, the material of a base part is not limited to wood, It can change suitably. Further, although the two curved surfaces 2b are provided at both ends of the first flat surface 2a in the base portion 2, the two curved surfaces 2b are not necessarily provided. Thus, the shape and size of the base portion can be changed as appropriate.

  In the above embodiment, the two raising members 1 are attached to the one end 10 </ b> A of the PC pillar 10. However, the number of the raising members 1 attached to the pillar or how to attach the raising members 1 to the PC pillar 10 is appropriately determined. It can be changed.

  Moreover, in the said embodiment, after attaching the raising tool 1 to the PC pillar 10, the protection mat 4 was laid in the downward position of the one end 10A, but even if the protection mat 4 is laid before attaching the raising tool 1. Good. Furthermore, the sling around which the wire rope is wound around the PC pillar 10 may be performed at any time after the PC pillar 10 is placed on the sleeper M and before the PC pillar 10 is pulled up.

  Moreover, in the said embodiment, although the rod-shaped part 3b was inserted in the hole 11 in which the main reinforcement of another pillar is inserted, the hole which inserts a rod-shaped part is not limited to the hole 11. FIG. For example, a hole for inserting a rod-shaped portion may be made in advance at one end of a pillar at a factory or the like. In short, any hole formed at one end of a column can be used as a hole for inserting a rod-shaped portion.

  Moreover, in the said embodiment, although the tile 13 was provided in one side of the PC pillar 10, the tile may be provided in all the surfaces of the PC pillar, and the PC pillar in which the tile is not provided. It may be. Furthermore, the raising tool according to the present invention can be applied not only to the PC pillar 10 but also to a pillar having a shape and a size different from those of the PC pillar 10.

  Moreover, although the said embodiment demonstrated the example in case a concrete structure is the PC pillar 10, this invention is applicable also to concrete structures other than a pillar. For example, if a hole is provided in one end surface of a concrete structure and a rod-shaped part is inserted into this hole, a large concrete wall or a large mullion (a vertical frame material that separates windows and windows, etc.), etc. Can be easily raised.

DESCRIPTION OF SYMBOLS 1 ... Raising tool, 2 ... Base part, 2a ... 1st plane, 2b ... Curved surface, 2c ... 2nd plane, 2d ... Hole part, 2f ... End side, 2g ... Seat carving, 2h ... Lower end, 2j ... concave portion, 3 ... mounting portion, 3a ... steel pipe, 3b ... rod-like portion, 3c ... tightening portion, 10 ... PC pillar (concrete structure), 10A ... one end, 11 ... hole, S ... gap.

Claims (3)

In the raising tool used when raising a laid concrete structure on a predetermined surface,
A base part;
A rod-like portion that is fixed to the base portion and inserted into a hole formed in one end surface of the concrete structure,
The concrete structure, in a state where the rod-shaped portion is inserted into the hole, Ri Okiaga about an axis extending the base part as the horizontal direction,
The base portion is located between a portion that contacts the one end surface of the concrete structure when the rod-shaped portion is inserted into the hole and the one end surface when the rod-shaped portion is inserted into the hole. And a part that forms a gap . 2. The raising tool according to claim 1 , wherein the base portion has a curved surface that curves upward from a lower end when the rod-shaped portion is inserted into the hole of the laid concrete structure. In the raising method performed using the raising tool of Claim 1 or 2 ,
Inserting the rod-like portion into the hole of the concrete structure;
And raising the concrete structure around an axis extending in the horizontal direction through the base portion in a state where the rod-like portion is inserted into the hole.

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