JP6983189B2 - Jig for forming upper pillars and manufacturing method of upper pillars - Google Patents

Description

The present invention provides a jig for forming an upper column for manufacturing an upper column including a concrete portion in which a tension material is arranged and a steel pipe for a joint integrated into the concrete portion and connected to the lower column. The present invention relates to a method of manufacturing an upper pillar using the jig.

As a method for manufacturing a prestressed concrete column in which a tension material is arranged, for example, as shown in Patent Document 1, a large-diameter and small-diameter circular end plates having reinforcing bar insertion holes formed therein are provided, and the tension material is used as a reinforcing bar. A method is known in which concrete is injected into a mold after being inserted into an insertion hole and tension-fixed with these tensioning materials, and the entire mold is rotated to centrifuge.

Further, in Patent Document 2, convex portions and concave portions are formed in opposite directions of two holes adjacent to each other on the end plate for fixing the end portion of the tension material, and the end portion of the tension material is provided in the hole of the convex portion. A method of fixing the end plate and the anchor plate by fixing the anchor plate with bolts in the recesses facing each other and tensioning and fixing the tension material is described.

Further, Patent Document 3 shows an assembly-type concrete column made of prestressed concrete, wherein the upper column has an integrally molded portion integrated with the concrete portion and a fitting portion into which the lower column is fitted. A seat plate for fixing the end portion of the tension material is provided between the two.

Japanese Unexamined Patent Publication No. 51-49213 Japanese Unexamined Patent Publication No. 51-16330 Japanese Unexamined Patent Publication No. 2016-1553598

In the upper column of the assembled concrete column as shown in Patent Document 3, a seat plate portion for fixing the end portion of the tension material is provided in the steel pipe for the joint, that is, between the integrally molded portion and the fitting portion. Therefore, when the tension material is tense, the seat plate is fixed to the anchor plate as in Patent Document 1 and Patent Document 2, and it is difficult to fix the anchor plate to the formwork, and as a result, the tension material is fixed. It is considered difficult to fix the seat plate.

Therefore, there has been a demand for a technique that can easily fix the seat plate when the tensioning material is tensioned even in the upper column provided with the seat plate in the steel pipe for the joint.

The present invention has been made in view of such a point, and an object of the present invention is to provide a jig for forming an upper pillar and a method for manufacturing the upper pillar, which can easily fix a seat plate.

The jig for forming an upper column according to claim 1 is integrated with a columnar concrete portion in which a tension material is arranged along the axial direction and one end of the concrete portion in the axial direction. A joint steel pipe connected to a pillar is provided, and the joint steel pipe is provided on one side in the axial direction of the tubular integrally molded portion integrated with the concrete portion and the lower pillar. An upper column for manufacturing an upper column having a tubular fitting portion that can be fitted into the fitting portion and a seat plate provided between the integrally molded portion and the fitting portion and to which one end of the tension member is fixed. It is a jig for forming columns, and the jig main body that can be inserted into the fitting portion, the first fixing means for fixing the jig main body to the seat plate, and the tension material are tensioned. A second fixing means for fixing the jig body to the anchor plate for the purpose is provided, and the jig body is fixed to the seat plate by the first fixing means. It has a portion and an anchor plate fixing portion fixed to the anchor plate by the second fixing means.

The upper pillar forming jig according to claim 2 is the upper pillar forming jig according to claim 1. The first fixing means is a bolt for fixing the seat plate and the seat plate fixing portion, and a bolt thereof. The bolt has an operating member for operating the bolt, and the bolt has a screwed portion for screwing the seat plate and the seat plate fixing portion, and the seat plate and the seat plate fixed at the screwed portion. It has an operated portion that is operated by the operating member when screwing the portion, and the operating member has a rod-shaped engaging portion at its tip that can be engaged with the operated portion.

The upper pillar forming jig according to claim 3 is the upper pillar forming jig according to claim 2, and the jig main body is provided between the seat plate fixing portion and the anchor plate fixing portion in the axial direction. It has a guide unit that guides the operating member.

The method for manufacturing an upper pillar according to claim 4 includes a tubular integrally molded portion and a seat plate provided at one end of the integrally molded portion in the axial direction and to which one end of a tension material is fixed. An upper pillar in which a steel pipe for a joint having a tubular fitting portion provided on the opposite side of the integrally molded portion of the seat plate is integrated with one end portion in the axial direction of the columnar concrete portion is claimed. A method for manufacturing an upper column, which is manufactured by using the upper column forming jig according to any one of Items 1 to 3, wherein the steel pipe for a joint is set in a mold for forming an upper column in the previous period, and the joint is formed. The jig main body is inserted into the fitting portion of the steel pipe, the seat plate and the seat plate fixing portion of the jig main body are fixed by the first fixing means, and the anchor plate and the anchor plate of the jig main body are fixed. The portion is fixed by a second fixing means, the anchor plate is fixed to the mold, the tension material is tensioned from the other end side, concrete is injected into the mold, and the mold is rotated. It is formed by the centrifugal force.

According to the present invention, the jig main body has a seat plate fixing portion fixed to the seat plate by the first fixing means and an anchor plate fixing portion fixed to the anchor plate by the second fixing means. Therefore, the seat plate can be fixed to the anchor plate via the jig body, and the seat plate can be easily fixed.

It is sectional drawing which shows the structure of the jig for forming the upper column which concerns on one Embodiment of this invention. Same as above is a cross-sectional view showing a state before the jig for forming a pillar is installed. Same as above It is a cross-sectional view showing a state in which the jig main body of the pillar shaping jig is inserted into the fitting portion. It is sectional drawing which shows the state which the seat plate fixing part is fixed with respect to the seat plate by the 1st fixing means in the above-mentioned upper pillar forming jig. It is sectional drawing which shows the state which fixed the anchor plate fixing part with respect to the anchor plate by the 2nd fixing means in the same above-mentioned pillar forming jig. It is a top view which shows the structure of the anchor plate fixing part in the above-mentioned upper column forming jig. It is sectional drawing which shows the upper pillar manufactured by using the jig for forming the upper pillar of the same above.

Hereinafter, the configuration of one embodiment of the present invention will be described in detail with reference to the drawings.

In FIG. 1, reference numeral 1 denotes an upper pillar forming jig, and as shown in FIGS. 2 to 5, the upper pillar forming jig 1 includes an upper pillar 2 shown in FIG. 7 constituting an assembly type concrete pillar. It is used when molding by the mold 3.

Here, the upper pillar 2 is connected to a lower pillar (not shown), and is arranged and integrated with the columnar concrete portion 4 at one end (lower end) of the concrete portion 4 in the axial direction. It is provided with a steel pipe 5 for joints.

The joint steel pipe 5 has a cylindrical integrally formed portion 6 integrated with the concrete portion 4 and a cylindrical shape that is arranged on the lower side of the integrally formed portion 6 on one side in the axial direction and can be fitted to the lower column. It has a fitting portion 7 of the above, and a disk-shaped seat plate 8 provided between the integrally molded portion 6 and the fitting portion 7.

The outer diameter of the integrally molded portion 6 is substantially the same as the inner diameter of the mold 3, and forms a continuous surface with the outer peripheral surface of the integrated concrete portion 4.

One end of the tension member 9 is fixed to the seat plate 8, and the seat plate 8 is integrated with the inner peripheral surface between the integrally molded portion 6 and the fitting portion 7 by, for example, welding. , It has a circular opening 12 provided in the center of the seat plate portion main body 11.

In the seat plate portion main body 11, a tension material fixing hole 13 which is a through hole for fixing one end of a tension material 9 for introducing prestress to the concrete portion 4 and a jig 1 for forming an upper column are provided. A jig fixing hole 14 which is a through hole for fixing is provided.

The formwork 3 is for forming a concrete portion 4 integrally with the integrally formed portion 6 by installing a steel pipe 5 for a joint inside when the upper pillar 2 is manufactured.

The formwork 3 is configured by assembling a plurality of formwork components 15 which are detachable from each other, for example, two formwork components 15. That is, as shown in FIG. 2, the formwork 3 has a joint steel pipe 5 installed in one formwork structure 15, and another formwork structure 15 is assembled on the upper side thereof.

Further, the formwork 3 to which the formwork structure 15 is assembled is provided at a tubular formwork body 16 into which a steel pipe 5 for a joint can be inserted and at one end of the formwork body 16 in the axial direction. The formwork body 16 has a flange portion 17 that projects outward.

Then, in the formwork 3, the anchor plate 18 can be locked to the other side in the axial direction by the flange portion 17 with the joint steel pipe 5 inserted in the formwork main body 16.

The anchor plate 18 is locked to and fixed to the formwork 3 when the tensioning material 9 is tensioned, and its outer diameter is larger than the inner diameter of the formwork body 16 and is not inserted into the formwork 3. It is in the shape of an annulus plate.

Further, the anchor plate 18 has a jig fixing hole 19 which is a through hole for fixing to the jig main body 21.

As shown in FIG. 3, the upper column forming jig 1 includes a jig main body 21 that can be inserted into the fitting portion 7 and a seat plate 8 in a state where the joint steel pipe 5 is installed in the formwork 3. A first fixing means 22 for fixing the jig main body 21 to the anchor plate 18 and a second fixing means 23 for fixing the jig main body 21 to the anchor plate 18 are provided.

The jig main body 21 is in contact with the seat plate fixing portion 24 fixed by the first fixing means 22 in contact with the seat plate, and in contact with the anchor plate 18 by the second fixing means 23. Anchor plate fixing portion 25 fixed by, a cylindrical tubular portion 26 provided between these seat plate fixing portions 24 and the anchor plate fixing portion 25, and the seat plate fixing portion 24 and the anchor plate fixing portion. It has two annular plate-shaped guide portions 27 provided on the outer peripheral surface of the tubular portion 26 so as to be located between the 25 and the 25.

That is, in the jig body 21, the anchor plate fixing portion 25 is integrated with one end of the tubular portion 26 in the axial direction, and the seat plate fixing portion 24 is integrated with the other end of the tubular portion 26 in the axial direction. , The guide portion 27 is integrated with the outer peripheral surface of the tubular portion 26.

The outer diameter of the seat plate fixing portion 24 is slightly smaller than the inner diameter of the fitting portion 7, and the seat plate fixing portion 24 can be inserted into the fitting portion 7.

Further, the seat plate fixing portion 24 is provided with a seat plate fixing hole 31 which is a through hole for fixing to the seat plate 8 by the first fixing means 22.

The outer diameter of the anchor plate fixing portion 25 is slightly smaller than the inner diameter of the fitting portion 7, and the anchor plate fixing portion 25 can be inserted into the fitting portion 7.

Further, the anchor plate fixing portion 25 has an anchor plate fixing hole 32 which is a through hole for fixing to the anchor plate 18 by the second fixing means 23, and a seat plate fixing portion 24 and a seat by the first fixing means 22. It has an insertion hole 33, which is a through hole used when fixing the plate 8. As shown in FIG. 6, the anchor plate fixing hole 32 and the insertion hole 33 in the anchor plate fixing portion 25 are not arranged on the same circumference.

The outer diameter of the tubular portion 26 is smaller than the outer diameter of the seat plate fixing portion 24 and the anchor plate fixing portion 25.

The guide portion 27 has a guide hole 34 which is a through hole used when the seat plate fixing portion 24 and the seat plate 8 are fixed by the first fixing means 22.

When the jig body 21 is inserted into the fitting portion 7 and the upper pillar forming jig 1 is set, the seat plate fixing hole 31, the guide hole 34, and the insertion hole 33 are arranged on the same straight line. ..

The first fixing means 22 includes a bolt 35 that can be inserted into the seat plate fixing hole 31 and screwed into the jig fixing hole 14 in order to fix the seat plate 8 and the seat plate fixing portion 24, and the bolt 35. It has an operating member 36 such as a long wrench for screwing operation.

The bolt 35 has a screw portion 37 that can be inserted into the seat plate fixing hole 31 to screw and fix the seat plate 8 and the seat plate fixing portion 24 and can be screwed into the jig fixing hole 14, and this screw. The joint portion 37 has an operated portion 38 for being operated by the operating member 36 when the seat plate 8 and the seat plate fixing portion 24 are screwed together.

The operated portion 38 is arranged on the side opposite to the seat plate 8 in the seat plate fixing portion 24 in a state where the screwed portion 37 is inserted into the seat plate fixing hole 31, and the head 39 is not inserted into the seat plate fixing hole 31. And a hole-shaped engaged portion 40 provided on the head 39 and to which the operating member 36 can be engaged.

The operation member 36 is provided at a rod-shaped operation unit main body 41 that can be inserted into the insertion hole 33 and the guide hole 34, and one end portion (base end portion) in the axial direction of the operation unit main body 41 and is not inserted into the insertion hole 33, for example. A hexagonal head 42 in a plan view and an engaging portion 43 provided at the other end (tip portion) in the axial direction of the operating portion main body 41 and capable of engaging with the engaged portion 40 of the operated portion 38. Have.

That is, in the first fixing means 22, the screw portion 37 of the bolt 35 is inserted into the seat plate fixing hole 31, and the operation portion main body 41 of the operation member 36 inserted into the insertion hole 33 is inserted into the guide hole 34. , The engaged portion 40 of the bolt 35 and the engaging portion 43 of the operating member 36 are held in the same linear arrangement, and by moving the operating member 36 to the bolt 35 side as it is, the engaged portion is engaged. 40 and the engaging portion 43 are engaged.

Further, by rotating the operation unit main body 41 in a state where the engaged portion 40 and the engaging portion 43 are engaged, the bolt 35 is rotated together with the operation unit main body 41 to cause the screwed portion 37 to rotate. It is screwed into the jig fixing hole 14.

After the seat plate 8 and the seat plate fixing portion 24 are screwed and fixed by screwing the bolt 35 to the jig fixing hole 14, the operating member 36 is pulled in a direction away from the bolt 35. The engagement between the engaged portion 40 and the engaging portion 43 is released, the operating portion main body 41 is pulled out from the guide hole 34, and the operating member 36 is removed from the upper column forming jig 1.

The second fixing means 23 is, for example, a hexagon bolt, and has a screw portion 44 that can be inserted into the jig fixing hole 19 of the anchor plate 18 and can be screwed into the anchor plate fixing hole 32 of the anchor plate fixing portion 25. It has a hexagonal head 45 in a plan view located at one end in the axial direction of the screwed portion 44.

Then, in a state where the seat plate 8 and the upper pillar forming jig 1 are fixed by the bolt 35 of the first fixing means 22, and the operating member 36 is removed from the upper pillar forming jig 1, the second By inserting the screwed portion 44 in the fixing means 23 into the jig fixing hole 14 and screwing it into the anchor plate fixing hole 32, the anchor plate 18 is locked to the flange portion 17 and the jig 1 for forming the upper column is formed. The anchor plate 18 is fixed, and the seat plate 8 is fixed to the anchor plate 18 via the upper column forming jig 1.

Next, the operation and effect of the above embodiment will be described.

When forming the upper column 2 using the upper column forming jig 1, first, as shown in FIG. 2, a joint steel pipe 5 is attached to one formwork component 15 constituting the formwork body 21. Install.

Further, as shown in FIG. 3, the formwork components 15 are fixed to each other by assembling another formwork component 15 to one formwork component 15 and tightening, for example, a formwork joint bolt (not shown). The frame body 16 is configured.

Further, with the formwork components 15 fixed to each other, the upper column forming jig 1 is inserted into the fitting portion 7 of the joint steel pipe 5, and the seat plate fixing portion 24 is brought into contact with the seat plate 8.

Further, as shown in FIG. 4, the operating member 36 is inserted into the insertion hole 33 and each guide hole 34, and the engaged portion 40 of the bolt 35 is engaged with the engaging portion 43 of the operating member 36. The operating member 36 is rotated, and the seat plate 8 and the seat plate fixing portion 24 are screwed together by the bolts 35.

After the seat plate 8 and the seat plate fixing portion 24 are screwed together, the operating member 36 is removed so as to be pulled out from the upper pillar forming jig 1.

Next, as shown in FIG. 5, the anchor plate 18 is brought into contact with the anchor plate fixing portion 25 and the flange portion 17 of the formwork 3, and the anchor plate 18 and the anchor plate fixing portion 25 are provided by the second fixing means 23. And screw it together. In the state where the anchor plate 18 and the anchor plate fixing portion 25 are screwed together, the anchor plate 18 is locked to the flange portion 17.

With the anchor plate 18 locked to the flange portion 17, the tension member 9 is tensioned from the other end side. Subsequently, concrete is poured into the formwork 3, the formwork 3 is installed in a centrifugal molding machine, the formwork 3 is rotated, and the upper pillar 2 is formed by centrifugal compaction using the centrifugal force.

After the molding is completed, for example, unsolidified concrete, so-called slag, etc. generated in the form 3 is discharged.

Further, after putting the mold 3 in the curing tank and performing atmospheric pressure steam curing, the anchor plate 18 and the upper pillar forming jig 1 are removed.

Further, the other formwork components 15 are removed from the one formwork structure 15, and the upper pillar 2 is taken out from the one formwork structure 15.

Then, according to the above-described embodiment, the jig main body 21 is fixed to the seat plate 8 by the first fixing means 22, and the anchor plate 18 is fixed by the second fixing means 23. Since the anchor plate fixing portion 25 is fixed to the anchor plate 18, the seat plate 8 can be fixed to the anchor plate 18 via the jig main body 21. Therefore, when the tension material 9 is tensioned to introduce prestress, the seat plate 8 to which the end portion of the tension material 9 is fixed can be easily fixed to the formwork 3. As a result, even the upper column 2 having the structure in which the seat plate 8 is provided in the joint steel pipe 5 can be appropriately formed.

The first fixing means 22 has a bolt 35 and an operating member 36 for operating the bolt 35, and the engaging portion 43 of the operating member 36 is engaged with the engaged portion 40 of the bolt 35. The bolt 35 can be operated via the operating member 36. Therefore, even in the upper pillar 2 having the seat plate 8 provided in the joint steel pipe 5, the seat plate 8 and the seat plate fixing portion 24 can be easily screwed and fixed by the bolt 35.

Further, since the jig main body 21 has a guide portion 27 provided between the seat plate fixing portion 24 and the anchor plate fixing portion 25 in the axial direction to guide the operating member 36, the bolt is used in the first fixing means 22. The operability of the operating member 36 when screwing the 35 can be improved.

In the above embodiment, the first fixing means 22 has a bolt 35 and an operating member 36, but the configuration is not limited to this, and the seat plate fixing portion 24 is attached to the seat plate. Any configuration may be used as long as it can be fixed.

Further, in the case where the first fixing means 22 has the bolt 35 and the operating member 36, the jig main body 21 is not limited to the configuration having the guide portion 27, and the configuration is such that the guide portion 27 is not provided. You may.

1 Jig for forming upper pillars 2 Upper pillars 4 Concrete parts 5 Steel pipes for fittings 6 Integrally formed parts 7 Fitting parts 8 Seat plates 9 Tension materials
18 Anchor plate
21 Jig body
22 First fixing means
23 Second fixing means
24 Seat plate fixing part
25 Anchor plate fixing part
27 Guide section
35 volt
36 Operation member
43 Engagement part

Claims (4)

A columnar concrete portion in which tension members are arranged along the axial direction and a steel pipe for a joint integrated with one end of the concrete portion in the axial direction and connected to a lower column are provided for the joint. A tubular integrally molded portion in which a steel pipe is integrated with the concrete portion, and a tubular fitting portion provided on one side of the integrally molded portion in the axial direction and capable of fitting to the lower column, and these are integrated. An upper column forming jig for manufacturing an upper column having a seat plate provided between a forming portion and a fitting portion and to which one end of the tension material is fixed.
The jig body that can be inserted into the fitting portion, the first fixing means for fixing the jig body to the seat plate, and the anchor plate for tensioning the tensioning material are cured. Equipped with a second fixing means for fixing the tool body,
The jig main body has a seat plate fixing portion fixed to the seat plate by the first fixing means and an anchor plate fixing portion fixed to the anchor plate by the second fixing means. A jig for forming an upper pillar, which is characterized by having. The first fixing means has a bolt for fixing the seat plate and the seat plate fixing portion, and an operating member for operating the bolt.
The bolt is operated by the operating member when the seat plate and the seat plate fixing portion are screwed together and the seat plate and the seat plate fixing portion are screwed by the screwed portion. Has an operated part to be operated
The jig for forming an upper column according to claim 1, wherein the operating member is rod-shaped and has an engaging portion at the tip thereof that can be engaged with the operated portion. The jig for forming an upper column according to claim 2, wherein the jig main body has a guide portion provided between the seat plate fixing portion and the anchor plate fixing portion in the axial direction to guide the operating member. A cylindrical integrally molded portion, a seat plate provided at one end of the integrally molded portion in the axial direction and fixed to one end of the tension material, and a seat plate on the opposite side of the integrally molded portion. The upper pillar forming cure according to any one of claims 1 to 3, wherein the upper pillar in which the steel pipe for the joint having the provided tubular fitting portion is integrated with one end portion in the axial direction of the columnar concrete portion is formed. It is a manufacturing method of the upper pillar that is manufactured using tools.
The steel pipe for joints is set in the formwork for forming the upper column in the previous term, and
The jig body is inserted into the fitting portion of the joint steel pipe, and the jig body is inserted.
The seat plate and the seat plate fixing portion of the jig body are fixed by the first fixing means.
The anchor plate and the anchor plate fixing portion of the jig body are fixed by the second fixing means, and the anchor plate is fixed.
The anchor plate is fixed to the formwork and
Tension the tension material from the other end side,
Inject concrete into the formwork and
A method for manufacturing an upper pillar, which comprises rotating the formwork and forming it by its centrifugal force.

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