JP6774913B2 - Joints for concrete columns and prefabricated concrete columns - Google Patents

Joints for concrete columns and prefabricated concrete columns Download PDF

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JP6774913B2
JP6774913B2 JP2017138104A JP2017138104A JP6774913B2 JP 6774913 B2 JP6774913 B2 JP 6774913B2 JP 2017138104 A JP2017138104 A JP 2017138104A JP 2017138104 A JP2017138104 A JP 2017138104A JP 6774913 B2 JP6774913 B2 JP 6774913B2
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column
concrete
joint
tapered
pillar
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JP2019019525A (en
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広樹 菊
広樹 菊
護 古市
護 古市
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Nippon Concrete Industries Co Ltd
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Description

本発明は、コンクリート製の上側柱と、下方に向かって漸次径大のテーパ部を少なくとも上端部の所定範囲に有するコンクリート製の下側柱とを軸方向に接続するコンクリート柱用継手、および、それを用いて上側柱と下側柱とが接続される組立式コンクリート柱に関する。 The present invention includes a concrete column joint for axially connecting an upper column made of concrete and a lower column made of concrete having a tapered portion having a gradually increasing diameter downward in at least a predetermined range of the upper end portion. It relates to an assembling concrete column in which an upper column and a lower column are connected by using it.

コンクリート柱は、下方に向かって漸次径大のテーパ形状が一般的であり、同等規格の組立式コンクリート柱も同様にテーパ形状が多い。すなわち、テーパ形状の組立式コンクリート柱は、テーパ形状の上側柱と下側柱を、コンクリート柱用継手にて軸方向に接続して構成されることが多い。 Concrete columns generally have a tapered shape with a gradual increase in diameter toward the bottom, and assembling concrete columns of the same standard also have many tapered shapes. That is, the tapered assembly type concrete column is often configured by connecting the tapered upper column and the lower column in the axial direction with a concrete column joint.

この種の組立式コンクリート柱に用いられる継手としては、例えば差込式、フランジ式およびリング式等が知られている。 As the joint used for this type of assembled concrete column, for example, a plug-in type, a flange type, a ring type and the like are known.

差込式継手は、特許文献1および特許文献2等のように、2つの柱のそれぞれの端部が互いに差込可能に構成された継手である。 The plug-in type joint is a joint in which the ends of the two columns can be inserted into each other, as in Patent Document 1 and Patent Document 2.

フランジ式継手は、特許文献3等のように、2つの柱の端部に円板状部材(フランジ部)が設けられており、これらを突き合わせてボルトおよびナットで接続する継手である。 A flange type joint is a joint in which disc-shaped members (flange portions) are provided at the ends of two pillars as in Patent Document 3 and the like, and these are butted against each other and connected by bolts and nuts.

リング式継手は、特許文献4等のように、2つの柱の端部に設けられたフランジと、フランジに外嵌可能でそのフランジを軸方向に締め付ける2つ割りの内リング(第1のリング)と、内周に内リングの外周のテーパ形状に対応した円錐テーパを有し内リングに外嵌可能な外リング(第2のリング)とを備え、これらフランジと内リングと外リングとで上下の柱を接続する構成である。 As in Patent Document 4, the ring type joint includes a flange provided at the end of two pillars and a halved inner ring (first ring) that can be fitted to the flange and tightens the flange in the axial direction. ) And an outer ring (second ring) that has a conical taper on the inner circumference corresponding to the tapered shape of the outer circumference of the inner ring and can be fitted to the inner ring, and these flanges, the inner ring, and the outer ring It is a configuration that connects the upper and lower pillars.

また、柱用の継手ではないが、鋼管の差込式の継手としては、特許文献5に示すように、一方の鋼管の端部にかしめが設けられた構成が知られている。 Further, although it is not a joint for columns, as a plug-in type joint for steel pipes, as shown in Patent Document 5, a configuration in which a caulking is provided at an end portion of one of the steel pipes is known.

特開平6−257324号公報Japanese Unexamined Patent Publication No. 6-257324 特開2014−84614号公報Japanese Unexamined Patent Publication No. 2014-84414 特開2008−95456号公報Japanese Unexamined Patent Publication No. 2008-95456 特開2009−197554号公報Japanese Unexamined Patent Publication No. 2009-197554 特開2000−227184号公報Japanese Unexamined Patent Publication No. 2000-227184

しかしながら、上述の特許文献1および特許文献2や特許文献5等の差込式の構成では、部品が少なく簡易な構成で、コストを抑えることができ、施工性にも優れているが、製造上等の観点から適切な継手とは言えない。 However, in the above-mentioned plug-in type configurations such as Patent Document 1, Patent Document 2, and Patent Document 5, the number of parts is small, the configuration is simple, the cost can be suppressed, and the workability is excellent. It cannot be said that the joint is suitable from the viewpoint of the above.

すなわち、継手として利用可能なテーパ形状の鋼管に関する規格品(既製品)がないため、個別に設計および製造する必要がある。 That is, since there is no standard product (off-the-shelf product) for tapered steel pipes that can be used as a joint, it is necessary to design and manufacture them individually.

また、継手を構成する鋼板や鋼管をテーパ形状で寸法精度を高く成形する必要があり、容易に製造できない。 Further, it is necessary to form the steel plate or steel pipe constituting the joint in a tapered shape with high dimensional accuracy, and it cannot be easily manufactured.

さらに、テーパ状の鋼管である継手を下側柱に嵌合させて接続するため、鋼管を作成する際に発生する内周面の溶接ビードが、下側柱に干渉してしまい適切に接続(嵌合)できなくなってしまう。そのため、内周面の溶接ビードを切除する必要があるが、継手を構成する鋼管は比較的大きなものではなく、内周面の切除作業を行いにくい。 Furthermore, since the joint, which is a tapered steel pipe, is fitted and connected to the lower column, the weld bead on the inner peripheral surface generated when creating the steel pipe interferes with the lower column and connects properly ( It will not be possible to fit). Therefore, it is necessary to cut off the weld bead on the inner peripheral surface, but the steel pipe constituting the joint is not relatively large, and it is difficult to cut off the inner peripheral surface.

また、下側柱との接続部分では、その形状精度に起因して、部分的な隙間ができてしまい、接触位置(力の伝達位置)が安定しない。 Further, at the connecting portion with the lower pillar, a partial gap is formed due to the shape accuracy, and the contact position (force transmission position) is not stable.

特許文献5のようなかしめが設けられた構成は、鋼管内における下側柱との接触箇所がそのかしめの一箇所のみであるため、柱全体としての曲げ剛性が低く(変形が大きく)、柱の継手としては適していない。 In the configuration in which the caulking is provided as in Patent Document 5, since the contact point with the lower column in the steel pipe is only one point of the caulking, the bending rigidity of the column as a whole is low (large deformation), and the column It is not suitable as a joint.

上述の特許文献3のフランジ式の構成や特許文献4のリング式の構成では、継手強度および機械的な信頼性は優れているものの、部品が多くなるため、コストが上昇するとともに、構造計算が複雑になり、また、施工時や保守点検時の工数や管理項目が多くなってしまう。 In the flange type configuration of Patent Document 3 and the ring type configuration of Patent Document 4 described above, although the joint strength and mechanical reliability are excellent, the number of parts increases, which increases the cost and structural calculation. It becomes complicated, and the number of man-hours and management items at the time of construction and maintenance / inspection increase.

したがって、効率的に製造および施工でき、上側柱と下側柱とを適切に接続できるコンクリート柱用継手が求められていた。 Therefore, there has been a demand for a concrete column joint that can be efficiently manufactured and constructed and that can appropriately connect the upper column and the lower column.

本発明はこのような点に鑑みなされたもので、効率的に製造および施工でき、上側柱と下側柱とを適切に接続できるコンクリート柱用継手、および、それを用いた組立式コンクリート柱を提供することを目的とする。 The present invention has been made in view of such a point, and a joint for a concrete column which can be efficiently manufactured and constructed and can appropriately connect an upper column and a lower column, and an assembly type concrete column using the joint are provided. The purpose is to provide.

請求項1に記載されたコンクリート柱用継手は、コンクリート製の上側柱と、下方に向かって漸次径大のテーパ部を少なくとも上端部の所定範囲に有するコンクリート製の下側柱とを軸方向に接続するコンクリート柱用継手であって、前記上側柱に一体的に接続される上側接続部と、前記下側柱に接続される下側接続部とを備え、前記下側接続部は、前記テーパ部に嵌合可能な円筒状の嵌合部と、この嵌合部より上方に位置し内側へ突出した接触部とを有し、前記下側接続部が前記下側柱に接続された状態では、前記嵌合部が前記テーパ部に嵌合し、かつ、前記接触部が前記テーパ部の外周面の一部に接触するものである。 The joint for a concrete column according to claim 1 has an upper column made of concrete and a lower column made of concrete having a tapered portion having a gradually increasing diameter downward in at least a predetermined range of an upper end portion in the axial direction. It is a joint for a concrete column to be connected, and includes an upper connecting portion integrally connected to the upper column and a lower connecting portion connected to the lower column, and the lower connecting portion is tapered. In a state where it has a cylindrical fitting portion that can be fitted to the portion and a contact portion that is located above the fitting portion and protrudes inward, and the lower connecting portion is connected to the lower pillar. The fitting portion is fitted to the tapered portion, and the contact portion is in contact with a part of the outer peripheral surface of the tapered portion.

請求項2に記載されたコンクリート柱用継手は、請求項1記載のコンクリート柱用継手において、嵌合部は、下端部から軸方向の所定範囲に設けられたスリットを有するものである。 The concrete column joint according to claim 2 is the concrete column joint according to claim 1, wherein the fitting portion has a slit provided in a predetermined range in the axial direction from the lower end portion.

請求項3に記載された組立式コンクリート柱は、コンクリート製の上側柱と、下方に向かって漸次径大のテーパ部を少なくとも上端部の所定範囲に有するコンクリート製の下側柱と、請求項1または2記載のコンクリート柱用継手とを具備し、前記コンクリート柱用継手の上側接続部が前記上側柱に一体的に接続された状態にて、下側接続部における嵌合部が前記テーパ部に嵌合し、かつ、前記下側接続部における接触部が前記テーパ部の外周面の一部に接触することにより、前記上側柱と前記下側柱とが接続されるものである。 The assembly-type concrete column according to claim 3 includes an upper column made of concrete, a lower column made of concrete having a tapered portion having a gradually increasing diameter downward in a predetermined range of at least an upper end portion, and claim 1. Alternatively, the fitting portion in the lower connecting portion is connected to the tapered portion in a state where the joint for the concrete column according to 2 is provided and the upper connecting portion of the joint for the concrete column is integrally connected to the upper column. The upper pillar and the lower pillar are connected by being fitted and the contact portion in the lower connecting portion contacts a part of the outer peripheral surface of the tapered portion.

本発明は、下側接続部が、嵌合部と接触部とを有するため、効率的に製造および施工でき、上側柱と下側柱とを適切に接続できる。 In the present invention, since the lower connecting portion has a fitting portion and a contact portion, it can be efficiently manufactured and constructed, and the upper column and the lower column can be appropriately connected.

本発明の一実施の形態に係る組立式コンクリート柱の構成を示す断面図である。It is sectional drawing which shows the structure of the assembly type concrete column which concerns on one Embodiment of this invention. 同上組立式コンクリート柱におけるコンクリート柱用継手の下側接続部を示す正面図である。It is a front view which shows the lower connection part of the concrete column joint in the same-mentioned assembly type concrete column. 同上組立式コンクリート柱におけるコンクリート柱用継手の変形例を示す断面図である。It is sectional drawing which shows the deformation example of the joint for a concrete column in the said assembly type concrete column.

以下、本発明の一実施の形態の構成について図面を参照しながら詳細に説明する。 Hereinafter, the configuration of one embodiment of the present invention will be described in detail with reference to the drawings.

図1は、組立式コンクリート柱1を示し、この組立式コンクリート柱1は、コンクリート製の上側柱2と、コンクリート製の下側柱3とが、コンクリート柱用継手4を介して軸方向に接続されている。すなわち、組立式コンクリート柱1は、下側柱3の上側に、上側柱2がコンクリート柱用継手4を介して接続されている。 FIG. 1 shows an assembling type concrete column 1. In this assembling type concrete column 1, a concrete upper column 2 and a concrete lower column 3 are axially connected via a concrete column joint 4. Has been done. That is, in the assembly type concrete column 1, the upper column 2 is connected to the upper side of the lower column 3 via the concrete column joint 4.

上側柱2は、コンクリート製の柱状の本体部11の軸方向の下端部に端板12が設けられている。 The upper pillar 2 is provided with an end plate 12 at the lower end in the axial direction of a columnar main body 11 made of concrete.

本体部11は、図示しない上端部から下方へ漸次径大となる円錐筒状のテーパ部13を有し、このテーパ部13の下側には、外径が一定であるストレート形状の円筒部14が設けられている。 The main body portion 11 has a conical tubular tapered portion 13 whose diameter gradually increases downward from the upper end portion (not shown), and a straight cylindrical portion 14 having a constant outer diameter is below the tapered portion 13. Is provided.

また、円筒部14には、コンクリート柱用継手4の上端部が一体に接続されており、コンクリート柱用継手4の内側で円筒部14の下端部に端板12が設けられている。 Further, the upper end portion of the concrete column joint 4 is integrally connected to the cylindrical portion 14, and the end plate 12 is provided at the lower end portion of the cylindrical portion 14 inside the concrete column joint 4.

下側柱3は、コンクリート製の柱状の本体部15の軸方向の上端部に端板16が設けられている。 The lower pillar 3 is provided with an end plate 16 at the upper end in the axial direction of a columnar main body 15 made of concrete.

本体部15は、上端部から下方へ漸次径大となる円錐筒状のテーパ部17を有し、軸方向の全体にわたってテーパ形状に成形されている。 The main body portion 15 has a conical tubular tapered portion 17 whose diameter gradually increases downward from the upper end portion, and is formed in a tapered shape over the entire axial direction.

コンクリート柱用継手4は、外径が一定である直胴状(いわゆるストレート形状)の鋼管である。このコンクリート柱用継手4は、上側柱2に一体に接続された上側接続部21と、この上側接続部21の下側に位置し下側柱3に嵌合して接続される下側接続部22とを有している。 The concrete column joint 4 is a straight body-shaped (so-called straight shape) steel pipe having a constant outer diameter. The concrete column joint 4 has an upper connecting portion 21 integrally connected to the upper column 2 and a lower connecting portion located below the upper connecting portion 21 and fitted to and connected to the lower column 3. Has 22 and.

上側接続部21は、上側柱2を成形する際に、型枠内の対応する箇所に予め配置されて上側柱2に一体成形されている。すなわち、コンクリート柱用継手4は、上側接続部21が上側柱2のテーパ部13の下側の部分と型枠内で一体成形されることにより、一体化されている。 When the upper pillar 2 is molded, the upper connecting portion 21 is arranged in advance at a corresponding portion in the mold and is integrally molded with the upper pillar 2. That is, the concrete column joint 4 is integrated by integrally molding the upper connecting portion 21 with the lower portion of the tapered portion 13 of the upper column 2 in the formwork.

下側接続部22は、ストレート形状の嵌合部23と、この嵌合部23より内側へ突出した接触部24とを有している。 The lower connecting portion 22 has a straight-shaped fitting portion 23 and a contact portion 24 protruding inward from the fitting portion 23.

嵌合部23は、下側柱3のテーパ部17を挿入するように嵌合可能である。すなわち、上側接続部21を上側柱2に一体成形した状態にて、上側柱2とともにコンクリート柱用継手4を下側柱3の上方から下降させることで、嵌合部23内に下側柱3が挿入されてそのテーパ部17が嵌合部23内に嵌合される。 The fitting portion 23 can be fitted so as to insert the tapered portion 17 of the lower pillar 3. That is, in a state where the upper connecting portion 21 is integrally formed with the upper column 2, the concrete column joint 4 is lowered together with the upper column 2 from above the lower column 3, so that the lower column 3 is inside the fitting portion 23. Is inserted and the tapered portion 17 is fitted into the fitting portion 23.

接触部24は、嵌合部23におけるテーパ部17との嵌合箇所より上方に位置し、嵌合部23の内周面の周方向に連続した円環状であり、例えば溶接等によって一体的に設けられている。 The contact portion 24 is located above the fitting portion of the fitting portion 23 with the tapered portion 17, and is an annular shape continuous in the circumferential direction of the inner peripheral surface of the fitting portion 23, and is integrally formed by, for example, welding. It is provided.

また、図2に示すように、下側接続部22には、嵌合部23の下端部から軸方向の所定範囲へ延びる複数のスリット25が設けられている。 Further, as shown in FIG. 2, the lower connecting portion 22 is provided with a plurality of slits 25 extending from the lower end portion of the fitting portion 23 to a predetermined range in the axial direction.

各スリット25は、嵌合部23の下端縁部から直線状に切込形成されており、嵌合部23の周方向に一定間隔で互いに離間している。 Each slit 25 is formed by cutting linearly from the lower end edge portion of the fitting portion 23, and is separated from each other at regular intervals in the circumferential direction of the fitting portion 23.

そして、下側接続部22内に下側柱3のテーパ部17を挿入すると、その下側接続部22の嵌合部23におけるスリット25が設けられた範囲が、テーパ部17の形状に対応するように変形して嵌合される。 Then, when the tapered portion 17 of the lower pillar 3 is inserted into the lower connecting portion 22, the range in which the slit 25 is provided in the fitting portion 23 of the lower connecting portion 22 corresponds to the shape of the tapered portion 17. It is deformed and fitted in this way.

下側接続部22が下側柱3のテーパ部17に嵌着されて接続された状態では、嵌合部23がテーパ部17に嵌合し、かつ、接触部24がテーパ部17の外周面の一部に接触する。すなわち、下側柱3に接続されたコンクリート柱用継手4は、嵌合部23におけるテーパ部17との嵌合箇所であるスリット25に対応する範囲と接触部24とがテーパ部17の外周面に接触する。 In a state where the lower connecting portion 22 is fitted and connected to the tapered portion 17 of the lower pillar 3, the fitting portion 23 is fitted to the tapered portion 17 and the contact portion 24 is the outer peripheral surface of the tapered portion 17. Contact a part of. That is, in the concrete column joint 4 connected to the lower column 3, the range corresponding to the slit 25, which is the fitting point with the tapered portion 17 in the fitting portion 23, and the contact portion 24 are the outer peripheral surfaces of the tapered portion 17. Contact.

また、このように上側接続部21が上側柱2に一体化され、かつ、下側接続部22が下側柱3に嵌着された状態のコンクリート柱用継手4内では、上側柱2の下端面に位置する端板12と下側柱3の上端面に位置する端板16とが、軸方向に離間した状態で対向している。 Further, in the concrete column joint 4 in which the upper connecting portion 21 is integrated with the upper column 2 and the lower connecting portion 22 is fitted to the lower column 3, the lower connecting portion 21 is under the upper column 2. The end plate 12 located on the end surface and the end plate 16 located on the upper end surface of the lower pillar 3 face each other in a state of being separated in the axial direction.

次に、上記一実施の形態の作用および効果を説明する。 Next, the actions and effects of the above embodiment will be described.

コンクリート柱用継手4は、下側接続部22が、嵌合部23と接触部24とを有し、下側接続部22が下側柱3のテーパ部17に接続された状態では、嵌合部23がテーパ部17に嵌合し、かつ、接触部24がテーパ部17の外周面の一部に接触するため、下側接続部22が、テーパ部17に対して、嵌合部23における嵌合箇所と接触部24とで軸方向に複数箇所接触する。そのため、コンクリート柱用継手4が下側柱3に対して安定して支持され、上側柱2と下側柱3とを適切に接続できる。 The concrete column joint 4 is fitted in a state where the lower connecting portion 22 has the fitting portion 23 and the contact portion 24 and the lower connecting portion 22 is connected to the tapered portion 17 of the lower column 3. Since the portion 23 is fitted to the tapered portion 17 and the contact portion 24 is in contact with a part of the outer peripheral surface of the tapered portion 17, the lower connecting portion 22 is attached to the tapered portion 17 in the fitting portion 23. The mating portion and the contact portion 24 make contact at a plurality of locations in the axial direction. Therefore, the concrete column joint 4 is stably supported with respect to the lower column 3, and the upper column 2 and the lower column 3 can be appropriately connected.

また、上側接続部21および下側接続部22のいずれも外径が一定のストレート形状に構成できるため、下側接続部22を下側柱3のテーパ部17に対応したテーパ形状に成形または加工する必要がなく、例えばJIS G 3444に規定された一般構造用炭素鋼鋼管等のような規格品を利用して、効率的に製造できる。 Further, since both the upper connecting portion 21 and the lower connecting portion 22 can be configured into a straight shape having a constant outer diameter, the lower connecting portion 22 is formed or processed into a tapered shape corresponding to the tapered portion 17 of the lower pillar 3. It is not necessary to do so, and it can be efficiently manufactured by using a standard product such as a carbon steel pipe for general structure specified in JIS G 3444.

さらに、下側接続部22は、テーパ部17に対して嵌合箇所および接触部24のみが接触し、嵌合部23における嵌合箇所および接触部24以外の部分とテーパ部17との間には隙間が生じるため、溶接によるビードを切除する箇所を大幅に低減できるとともに、上側柱2と下側柱3との力の伝達メカニズムが明確になり、設計照査しやすくなる。 Further, in the lower connecting portion 22, only the fitting portion and the contact portion 24 are in contact with the tapered portion 17, and the portion other than the fitting portion and the contact portion 24 in the fitting portion 23 is between the tapered portion 17. Since a gap is generated, the number of places where the bead is cut by welding can be significantly reduced, and the mechanism of force transmission between the upper column 2 and the lower column 3 becomes clear, which facilitates design verification.

また、コンクリート柱用継手4にて上側柱2と下側柱3とを接続する際には、上側接続部21を上側柱2に一体成形し、その上側柱2とともに上方から下側柱3に向かって下降させて、下側接続部22内に下側柱3のテーパ部17を挿入するように嵌合させるだけであるため、作業が容易であり効率的に施工できる。 Further, when connecting the upper column 2 and the lower column 3 with the concrete column joint 4, the upper connecting portion 21 is integrally molded with the upper column 2, and together with the upper column 2, from the upper side to the lower column 3. Since it is only lowered toward the lower side and fitted so as to insert the tapered portion 17 of the lower pillar 3 into the lower connecting portion 22, the work is easy and efficient.

さらに、下側接続部22の嵌合部23にスリット25が設けられているため、下側接続部22内に下側柱3を挿入するように嵌着すると、その下側接続部22の嵌合部23におけるスリット25が設けられた範囲がテーパ部17の形状に対応するように変形する。そのため、例えばスリット25が設けられておらず嵌合部23の下側縁部のみがテーパ部17に接触した状態で嵌合された場合に比べて、テーパ部17との接触面積が大きくなり、より強固に嵌着できる。 Further, since the slit 25 is provided in the fitting portion 23 of the lower connecting portion 22, when the lower pillar 3 is fitted so as to be inserted into the lower connecting portion 22, the lower connecting portion 22 is fitted. The range where the slit 25 is provided in the joint portion 23 is deformed so as to correspond to the shape of the tapered portion 17. Therefore, for example, the contact area with the tapered portion 17 is larger than that in the case where the slit 25 is not provided and only the lower edge portion of the fitting portion 23 is in contact with the tapered portion 17. Can be fitted more firmly.

なお、上記一実施の形態では、上側柱2はテーパ部13を有し、そのテーパ部13の下側が円筒状である構成としたが、このような構成には限定されず、コンクリート柱用継手4が一体的に接続された構成であればよく、例えば、軸方向全体が円筒状(ストレート形状)である構成等にしてもよい。 In the above embodiment, the upper column 2 has a tapered portion 13 and the lower side of the tapered portion 13 has a cylindrical shape, but the configuration is not limited to such a configuration, and a joint for a concrete column. The configuration may be such that 4 is integrally connected, and for example, the entire axial direction may be cylindrical (straight shape).

下側柱3は、テーパ部17が少なくとも上端部から所定範囲に設けられた構成であればよく、例えば、軸方向全体がテーパ形状の構成や、上端部から一部の領域のみがテーパ形状である構成等であればよい。 The lower pillar 3 may have a structure in which the tapered portion 17 is provided at least in a predetermined range from the upper end portion. It may have a certain configuration or the like.

コンクリート柱用継手4は、規格品の鋼管を利用したストレート形状のものが好ましいが、このような構成には限定されず、上側接続部21と下側接続部22とを備え、その下側接続部22がテーパ部17に嵌合可能な嵌合部23と、テーパ部17の外周面に接触する接触部24とを有する構成であればよい。 The concrete column joint 4 preferably has a straight shape using a standard steel pipe, but is not limited to such a configuration, and includes an upper connecting portion 21 and a lower connecting portion 22 and connects the lower side thereof. The configuration may be such that the portion 22 has a fitting portion 23 that can be fitted to the tapered portion 17 and a contact portion 24 that contacts the outer peripheral surface of the tapered portion 17.

下側接続部22は、スリット25が設けられた構成としたが、このような構成には限定されず、スリット25が設けられていない構成にしてもよい。 The lower connecting portion 22 has a configuration in which the slit 25 is provided, but the configuration is not limited to such a configuration, and a configuration in which the slit 25 is not provided may be used.

接触部24は、嵌合部23の内周面に周方向に連続して設けられた構成には限定されず、嵌合部23をテーパ部17に嵌合した状態で、そのテーパ部17の外周面の一部に接触可能であればよい。すなわち、例えば、嵌合部23において傾斜状に接触部24が設けられた構成や、嵌合部23の軸方向における異なる位置に複数の接触部24が設けられた構成や、嵌合部23の内周面に接触部24が点在するように設けられた構成等にしてもよい。 The contact portion 24 is not limited to a configuration in which the contact portion 24 is continuously provided on the inner peripheral surface of the fitting portion 23 in the circumferential direction, and the fitting portion 23 is fitted to the tapered portion 17 and the tapered portion 17 is fitted. It suffices if it can contact a part of the outer peripheral surface. That is, for example, a configuration in which the contact portion 24 is provided in an inclined shape in the fitting portion 23, a configuration in which a plurality of contact portions 24 are provided at different positions in the axial direction of the fitting portion 23, or a configuration in which the fitting portion 23 is provided. The configuration may be such that the contact portions 24 are scattered on the inner peripheral surface.

また、図3の変形例に示すように、鋼管であるコンクリート柱用継手4の所定箇所を絞り加工によって内側へ屈曲させることで、接触部31が形成された構成にしてもよい。 Further, as shown in the modified example of FIG. 3, the contact portion 31 may be formed by bending the predetermined portion of the concrete column joint 4 which is a steel pipe inward by drawing.

1 組立式コンクリート柱
2 上側柱
3 下側柱
4 コンクリート柱用継手
17 テーパ部
21 上側接続部
22 下側接続部
23 嵌合部
24 接触部
25 スリット
31 接触部
1 Assembled concrete column 2 Upper column 3 Lower column 4 Joint for concrete column
17 Tapered part
21 Upper connection
22 Lower connection
23 Fitting part
24 Contact
25 slits
31 Contact

Claims (3)

コンクリート製の上側柱と、下方に向かって漸次径大のテーパ部を少なくとも上端部の所定範囲に有するコンクリート製の下側柱とを軸方向に接続するコンクリート柱用継手であって、
前記上側柱に一体的に接続される上側接続部と、
前記下側柱に接続される下側接続部とを備え、
前記下側接続部は、前記テーパ部に嵌合可能な円筒状の嵌合部と、この嵌合部より上方に位置し内側へ突出した接触部とを有し、
前記下側接続部が前記下側柱に接続された状態では、前記嵌合部が前記テーパ部に嵌合し、かつ、前記接触部が前記テーパ部の外周面の一部に接触する
ことを特徴とするコンクリート柱用継手。
A joint for a concrete column that axially connects an upper column made of concrete and a lower column made of concrete having a tapered portion having a gradually increasing diameter downward at least in a predetermined range at the upper end portion.
An upper connection portion integrally connected to the upper pillar and
It is provided with a lower connecting portion connected to the lower pillar.
The lower connecting portion has a cylindrical fitting portion that can be fitted to the tapered portion, and a contact portion that is located above the fitting portion and projects inward.
In a state where the lower connecting portion is connected to the lower pillar, the fitting portion is fitted to the tapered portion and the contact portion is in contact with a part of the outer peripheral surface of the tapered portion. A characteristic joint for concrete columns.
嵌合部は、下端部から軸方向の所定範囲に設けられたスリットを有する
ことを特徴とする請求項1記載のコンクリート柱用継手。
The concrete column joint according to claim 1, wherein the fitting portion has a slit provided in a predetermined range in the axial direction from the lower end portion.
コンクリート製の上側柱と、
下方に向かって漸次径大のテーパ部を少なくとも上端部の所定範囲に有するコンクリート製の下側柱と、
請求項1または2記載のコンクリート柱用継手とを具備し、
前記コンクリート柱用継手の上側接続部が前記上側柱に一体的に接続された状態にて、下側接続部における嵌合部が前記テーパ部に嵌合し、かつ、前記下側接続部における接触部が前記テーパ部の外周面の一部に接触することにより、前記上側柱と前記下側柱とが接続される
ことを特徴とする組立式コンクリート柱。
The concrete upper pillar and
A concrete lower column having a taper portion with a gradually increasing diameter downward in a predetermined range at least at the upper end portion,
The concrete column joint according to claim 1 or 2 is provided.
In a state where the upper connecting portion of the concrete column joint is integrally connected to the upper column, the fitting portion in the lower connecting portion is fitted to the tapered portion, and the contact in the lower connecting portion. An assembly-type concrete pillar characterized in that the upper pillar and the lower pillar are connected by contacting a part of the outer peripheral surface of the tapered portion.
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JP7128797B2 (en) * 2019-11-29 2022-08-31 日本コンクリート工業株式会社 Column forming form and method for manufacturing column for prefabricated concrete column
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JPS5851319Y2 (en) * 1979-02-13 1983-11-22 日本電信電話株式会社 assembled telephone pole
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JPH06257324A (en) * 1993-03-08 1994-09-13 Nippon Steel Corp Joint type metallic pipe column and short pipe used for this column
JPH11190020A (en) * 1997-12-26 1999-07-13 Shintoku Kogyo Kk Joint structure of pile
JP2000227184A (en) * 1999-02-04 2000-08-15 Nkk Corp Execution method of inserted pipe joint for burying steel pipe, and inserted pipe joint
JP2008095456A (en) * 2006-10-13 2008-04-24 Chugoku Electric Power Co Inc:The Pole
JP2009197554A (en) * 2008-02-25 2009-09-03 Nippon Koatsu Concrete Kk Concrete pole
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