JP2009138363A - Joint for joining columnar members - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a joint for joining columnar members together, which enables a second columnar member to be joined to a first columnar member, axially displaced from a design position, by simply compensating displacement with a high degree of accuracy in a shorter period of time than ever. <P>SOLUTION: This joint for joining ends of the first and second columnar members together comprises: a first joint plate which is fixed to the end of the first columnar member via a fitting portion, and which has a plurality of through-holes around the fitting portion; a second joint plate which is precedently welded and fixed to the end of the second columnar member; a bolt which is inserted via a washer member turnably inserted and fitted into the through-hole so as to fasten the plates together; and a nut which is screwed to the bolt. The washer member is equipped with a slit-like bolt hole which is drilled in such a manner as to be elongated to an outer peripheral side along a radial direction from a central axis position. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a joint device for joining columnar members such as a steel pipe pile embedded in the ground and a steel column on the ground at the ends.

  Conventionally, it is indispensable to join columnar members made of various steel materials to construct a framework of a building, but as a joining method, most of them are welding or bolt-nut fastening using some kind of joint. is there. Therefore, a joint component that can be fixed to the columnar member in advance is welded at a factory, and the work for welding and fixing in the field is omitted as much as possible.

  For example, a steel column that is the main structure of a building's ground frame is supported by a reinforced concrete foundation that is constructed by digging up the ground to support it. As shown in FIG. 1, the ground is constructed such that the steel pillars 201 are erected on the heads of the piles 101 on the ground using a plurality of foundation piles 101 screwed and buried vertically in the ground as a foundation. Therefore, very simple construction methods that do not require the construction of reinforced concrete foundations are becoming popular.

  In such a construction method, for example, as shown in FIG. 7, the joint between the head of the underground pile 101 and the lower end of the steel pillar 201 on the ground side is performed by connecting the foundation pile 101 and the steel pillar 201 to each other. The joint plates (102, 202) welded and fixed to the respective end portions of the joint plates are vertically aligned, and the bolt holes (103, 203) formed in advance on the joint plates (102, 202) are vertically stacked to anchor bolts. The foundation pile 101 and the steel column 201 are integrally joined by inserting and fastening 104, and the pile-side joint plate 102 is a part of the foundation pile 101 that has been buried in the field. Is cut and adjusted for a predetermined length, and then fixed to the remaining head by welding. However, the steel column side joint plate 202 can be welded in advance at a factory or the like.

  In addition, when a beam or a brace is joined to a steel column, joining is performed via a joint as a joint. This joint is provided with a short columnar joint member projecting in a branched shape at a predetermined angle at a column beam or a reinforcement joint position. It is joined on the extension of the joint member by bolting the connecting plate over the member.

  Therefore, the short columnar joint member and the columnar member joined thereto are integrated to form a beam or a brace. Furthermore, a plurality of beams and braces are often joined to a single pillar, and in that case, a joint member is provided at each corresponding position of the pillar. In the field, after a column with a joint provided in a predetermined position is erected at a predetermined position, a columnar member that becomes a beam or a streak is attached to each joint member. Each is only bonded and fixed.

Japanese Patent No. 3095376

  However, in the conventional joining of the columnar members as described above, one columnar member positioned in advance is not necessarily in the correct position as designed, and in this case, the other columnar member must be shifted and joined. I will have to.

  For example, as shown in FIG. 8, the foundation pile 101 buried in the ground may be displaced from a predetermined design position B to a position B ′. In this case, since the ground column 201 must be erected with its axis aligned with the designed position B, after measuring the axial displacement (BB ') of the foundation pile 101, the column side joint plate 202 Adjust the position of the pile side joint plate 102 with respect to the head of the foundation pile 101 so that the center axis matches the design axis B of the foundation pile that should be, and then fix the welding by fixing the offset. Therefore, it is necessary to perform troublesome work that takes time to join the support column.

  In addition, it is difficult to adjust with high accuracy in the position adjustment at the time of on-site welding, and a deviation may still remain after welding. If even such a deviation remains, the deviation is compensated by bending the anchor bolt 104 inserted into the bolt hole (103, 203) that should be overlapped vertically. Bolts cannot be used, and the strength will be lower than the original value.

  Therefore, the connection between the foundation pile and the steel column depends on the welding at the site of the pile-side joint plate to the pile head. In this case, not only will the efficiency of all the work steps that make up the framework of the building be greatly reduced, but the strength will also be lower than that which would be obtained by normal joining.

  Further, even in the joining between the column and the beam or the brace as described above, the joint member that is welded and fixed to the column in advance may be displaced from the design position. In this case, it is possible to bend the connecting plate by the amount of misalignment when joining the columnar member that becomes a beam or a streak to the joint member, but this not only requires time for the work but also reduces the strength. There is also a fear.

  As described above, the joining between the columnar members that may cause axial misalignment is not limited to the one along the vertical direction such as the joining between the foundation pile and the pillar, but the one along the horizontal direction or the oblique direction, It is assumed in various scenes in the building framework process, such as extension joints and joint joints between columns, beams, braces, etc. In that case, the work efficiency is reduced and the strength is increased due to complicated labor. There was a risk of decline.

  In view of the above problems, an object of the present invention is to provide a second design for the first columnar member that has a predetermined design position and axial misalignment in the joining of the ends of the first and second columnar members. An object of the present invention is to provide a joint for joining columnar members that can be easily joined in a short time while maintaining good strength by adjusting the position of the columnar members with higher precision than before.

In order to achieve the above object, the columnar member joining joint according to the first aspect of the present invention is a joint for joining ends of the first columnar member and the second columnar member,
A fitting portion that is fitted to an end portion of the first columnar member that performs the joining; and a fixing unit that fixes the fitting portion to an end portion of the first columnar member;
The fitting portion is integrally formed with the fitting portion so that the surface thereof is located in a plane orthogonal to the axial direction of the first columnar member in the fitted and fixed state, and a through-hole having a predetermined diameter is formed by the fitting. A plurality of plate-like first joint plates formed around the joint;
A plate-like second joint plate that is welded and fixed in advance so that the surface thereof is positioned in a plane orthogonal to the axial direction of the columnar member at the end of the second columnar member to be joined;
In order to fasten the first joint plate or the third joint plate fixed to the first joint plate and the second joint plate in a face-to-face state, a washer member is inserted into each through hole from the first joint plate side. A bolt inserted through and a nut screwed into the bolt,
The washer member includes a columnar portion that is rotatably inserted into the through hole, a disk-shaped portion that has a larger diameter than the columnar portion and is integrally formed concentrically with the columnar portion, and these circles. Drilled to extend radially outward from the central axis position of the columnar part and the disk-shaped part, and has a width in which the bolt can be inserted and slides along the radial direction in the inserted state. Possible slit-shaped bolt holes.

The columnar member joining joint according to a second aspect of the present invention is the columnar member joining joint according to the second aspect, wherein the fitting portion has an axis extending downward from the back surface of the first joint plate. A cylindrical part provided integrally so that the direction follows,
The cylindrical portion has an inner diameter that substantially matches the outer diameter of the end portion of the first columnar member, and a slit-shaped notch formed in parallel with the axis from the lower end to the upper side is predetermined over the entire circumference. There are several at intervals,
The fixing means includes a split nut member fastened with a plurality of bolts around the cylindrical portion.

Moreover, the columnar member joining joint according to the invention described in claim 3 is the columnar member joining joint according to claim 1, wherein the first joint plate has a circular opening hole in the center,
The fitting portion includes a cylindrical portion integrally provided coaxially with the opening hole on the back surface of the first joint plate,
When the end portion of the first columnar member has a cylindrical shape, the cylindrical portion expands in a tapered shape toward an upper area having a uniform inner diameter and a lower end opening that substantially matches the inner diameter of the end portion. And a plurality of slit-shaped notches formed in parallel with the shaft center from the lower end to the upper side at predetermined intervals over the entire circumference, and the first joint on the upper side. A bottom plate is provided that forms a recess communicating with the opening hole of the plate,
The fixing means includes a substantially conical wedge member fitted from below the cylindrical portion, and a bolt and a nut for fixing the wedge member to the bottom plate exposed to the opening hole,
The wedge member is fixed so as to be adjustable in position along the axial direction by tightening a nut from an upper side of the bottom plate with an end of a bolt that penetrates the wedge member and the bottom plate from below.

  In the joint for joining the end portions of the columnar members of the present invention, the first joint plate fixed to the end portion of the first columnar member via the fitting portion and the fixing means is around the fitting portion. And fixed by welding to the end of the second columnar member in advance by fastening with bolts and nuts inserted through a washer member rotatably inserted into a predetermined through-hole formed in It is fixed to the second joint plate in a face-to-face state directly or via the third joint plate, and the first and second columnar members are joined together. The bolt holes drilled in the washer member are As a slit-like bolt hole extending radially outward from the center axis position, the bolt inserted into the bolt hole can be slid along the radial direction in the first joint. The Since the bolts can be eccentrically stopped with respect to the through-holes that can be set in any direction of the shaft, the first joint plate and the second joint plate can be directly or The second columnar member can be decentered in any direction and amount with respect to the first columnar member in a fixed state that is relatively eccentric via the third joint plate. Thereby, even if the first columnar member is positioned in a state of axial deviation from a predetermined design position, the longitudinal direction of the slit-shaped bolt hole of the washer member from the first joint plate side and the radius in the bolt hole By simply adjusting the bolting position in the direction, it is possible to easily and more accurately compensate for the shaft misalignment without requiring complicated operations such as adjustment at the time of welding in the field. Since the first and second columnar members can be joined to each other at the position where the columnar members are aligned with the design axis, the efficiency of the joining process between the columnar members is made possible, resulting in a building There is an effect that it is possible to realize the efficiency improvement of the whole work such as the construction of the framework.

  The joint according to the present invention has a plate-like second joint plate that is welded and fixed to one end of the second columnar member in a plane perpendicular to the axial direction of the columnar member in advance. A plate-like member integrally formed so that the surface thereof is positioned in a plane orthogonal to the axial direction of the columnar member at a fitting portion fixed by a fixing means in a state of being fitted to one end of one columnar member. A plurality of through-holes with a predetermined diameter formed around the fitting portion of the first joint plate from the first joint plate side in a face-to-face state directly or through a third joint plate fixed to the first joint plate The ends of the first and second columnar members are joined to each other by fastening with bolts and nuts inserted through the washer members, and the washer members rotate into the through holes of the first joint plate. A cylindrical portion that is inserted into the cylindrical portion and a disk-shaped portion that has a larger diameter than the cylindrical portion and is formed concentrically with the cylindrical portion, and a bolt hole into which the bolt is inserted The inserted bolt slides in the bolt hole along the radial direction in a slit shape that extends from the center axis position of the cylindrical portion and the disc-shaped portion to the outer peripheral side along the radial direction. It is possible.

  Therefore, in the present invention, the bolt is eccentrically stopped at an arbitrary position along the radial direction with respect to the through hole by using the washer member provided with the slit-shaped bolt hole in which the bolt can slide in the radial direction. Therefore, the first joint plate and the second joint plate can be relatively eccentrically joined directly or via the third joint plate by the amount of radial movement in the slit-shaped bolt hole. And since the said washer member is rotatable with respect to the through-hole of a 1st joint plate, the eccentric direction can also be set to arbitrary directions.

  That is, according to the joint of the present invention, the first joint plate 10 is fitted and fixed via the fitting portion 12 as shown in the schematic plan view seen from the second joint plate or the third joint plate in FIG. The second joint plate 20 or the third joint plate 40 fixed to the second columnar member 200 by welding with respect to the first columnar member 100 is eccentrically clamped in an arbitrary direction and amount and bolted. Therefore, even when the first columnar member 100 is in a position shifted from a predetermined design position (axial center position A) (axial center position A ′ after embedding), Without requiring complicated operations such as misalignment adjustment during welding, the longitudinal direction of the slit-like bolt hole 17 of the washer member 12 from the first joint plate side and the radial direction in the bolt hole By simply adjusting the upper bolting position, the second joint plate 20 can be directly or thirdly adjusted with the second columnar member 200 aligned with the designed position A simply and with higher accuracy than conventional welding. The first joint plate 10 can be fastened with a bolt via the joint plate 40, and the first and second columnar members (100, 200) are joined to each other substantially compensating for the axial deviation AA ′. Can do.

  Note that when the first joint plate and the second joint plate are directly bolted, the number of members constituting the joint of the present invention is small, but when the third joint plate is interposed, the number of members is Although the number of bolts is adjusted so as to compensate for the axial displacement between the first joint plate and the third joint plate, the second joint plate is aligned with the third joint plate whose position has been adjusted. Since the first columnar member and the second columnar member are joined by further fixing by bolt fastening, the bolt position adjustment operation for compensating for the axial deviation is accompanied by the first joint plate and the second columnar member. The operation is easier and simpler than when it is performed with the second joint plate.

  Moreover, the fitting part provided integrally with the 1st joint plate in this invention has a thing of the structure which can be favorably fitted in the one end part of a 1st columnar member, and can be simply fixed with a fixing means. For example, if at least the end portion of the first columnar member to be joined is a columnar shape, the fitting portion may be provided with a cylindrical portion whose size matches this.

  In this case, the structure which covers this cylindrical part on the outer side of a 1st columnar member first can be considered. Specifically, the cylindrical portion that is integrally provided so that the axial direction extends from the back surface of the first joint plate in the hanging direction has an inner diameter that substantially matches the outer diameter of the one end portion of the first columnar member. If a plurality of slit-shaped notches formed in parallel to the shaft center from the lower end are provided at predetermined intervals over the entire circumference, the cylindrical portion that covers the one end portion of the first columnar member is provided. If a split nut member as a fixing means is mounted around and tightened with a plurality of bolts, the cylindrical portion that is slightly reduced in diameter by the notch firmly tightens one end portion of the first columnar member, and as a result, the cylinder The first joint plate is satisfactorily fixed to the one end of the first columnar member via the portion.

  In addition, when one end portion to be joined of the first columnar member is also cylindrical, a chuck mechanism that inserts the cylindrical portion as a fitting portion into the end portion and pushes the cylindrical portion from the inside using a wedge member A good fitting and fixing state can be obtained by using. For example, the cylindrical portion integrally provided on the back surface of the first joint plate has an outer diameter that substantially matches the inner diameter of one end of the first columnar member, and an inner diameter that expands in a tapered manner with an upper region having a uniform inner diameter. If a plurality of slit-shaped notches formed in parallel with the shaft center from the lower end to the upper side are provided at predetermined intervals over the entire circumference, the cylindrical portion is formed into the first circle. Insert and fit into the cylindrical shape of one end of the columnar member, and if a substantially conical wedge member is fitted and pushed in from below the cylindrical portion as a fixing means, the cylindrical portion is slightly enlarged by the notch, and this expanded cylinder The portion is firmly fixed in the cylindrical shape at one end of the first columnar member like a chuck grip, and as a result, the first joint plate is well fixed to the first columnar member via the cylindrical portion.

  In this case, the wedge member can be pushed into the cylindrical portion with a simple configuration in which a bolt that screws the wedge member to the cylindrical portion is used as a feed screw with respect to the cylindrical portion. For example, a circular opening hole is provided in the center of the first joint plate, and a concave portion communicating with the opening hole is provided at an upper portion of the cylindrical portion formed coaxially with the opening hole. If the nut is screwed onto the tip of the bolt that passes through the wedge member fitted from the bottom and the bottom plate of the recess, the nut rotates on the bottom plate of the recess exposed in the opening hole of the first joint plate. The bolt moves upward with the wedge member with respect to the bottom plate simply by moving forward, and the wedge member is further pushed into the cylindrical portion.

  Note that the fixing means is not limited to the one using the dedicated member as described above, and the fitting portion and the end of the first columnar member such as the foundation pile head are welded and fixed, or a screw with a flange bolt. Straight fixing means such as stopping may be used. In this case, although the fixing work requires a little labor, it is a simple work that does not require fine position adjustment or the like, and the manufacturing process can be simplified as the number of special components is omitted.

  The columnar member referred to in the present invention is a general building steel frame such as an underground foundation part, a ground support part, a beam, a brace, a lock, a steel frame equipment frame such as a rooftop frame or a support frame, and various buildings such as a truss structure. It is a long member used in various parts of the framework of buildings, such as H-shaped steel, I-shaped steel, Z-shaped steel, T-shaped steel, flat steel, grooved steel, angle steel, etc., shaped steel, square steel pipe, cylindrical steel pipe, etc. A general structural steel material is mentioned and it does not limit to the specific steel column member used for a specific site | part at all.

  In addition, the joint according to the present invention can be used not only for joining columnar members having the same shape but also for joining columnar members having different shapes. For example, when using it for the joining of the foundation pile buried in the ground and the steel column standing up on this pile, the foundation pile becomes the 1st columnar member, and the steel column becomes the 2nd columnar member. Therefore, the first joint plate is fixed to the head of the foundation pile exposed on the ground, and is bolted via the washer member in a face-to-face state with the second joint plate fixed to the one end of the steel column in advance by welding. Both members are joined by fastening with a nut.

  In this case, according to the joint of the present invention, even if the foundation pile previously buried in the ground is misaligned from the design position, the second joint plate with respect to the first joint plate on the foundation pile side Adjusting the direction of the bolt hole of the washer member and the insertion position of the bolt, the second joint plate in the state where the steel column is aligned with the original design position in a state where the axial displacement is substantially compensated. Because it can be fixed to the plate, it is possible to eliminate the axial misalignment on the steel column side by adjusting the position of the welding fixing of the joint plate in the field as in the past, and the remaining misalignment is still corrected by bending the anchor bolt. Therefore, the labor and accuracy are improved, the strength is not lowered, and the efficiency of the entire work process can be improved.

  In addition, it can also be used for joining a column to a beam or a brace. In this case, the ends of the short columnar member projecting from the joint fixedly welded to the column and the columnar member on the main body side of the beam or brace are joined together. Even if the columnar short member on the joint side is displaced from the design position, according to the joint of the present invention, complicated and low precision work such as positional misalignment adjustment while welding in the field In addition, there is no need to bend the connecting plate to correct the remaining misalignment, and the misalignment has been eliminated so that the columnar member on the main unit can be placed at the designed position in a simple and short work. It can join to the columnar short member by the side of a joint.

  The joint of the present invention is similarly effective for joining the same kind of members as the extension of the columnar members in addition to the joining of the different columnar members as described above. In order to fix the relative position of the second joint plate with respect to the first joint plate, it is preferable to further provide position fixing means for clamping the joint plate from the front, rear, left and right side directions.

  Further, in the joint of the present invention, the upper limit length that can be decentered at the bolting position for compensating for the axial displacement of the first columnar member is the radial length of the slit bolt hole of the washer member on which the bolt can slide. (Excluding bolt diameter). The upper limit of the length of the bolt hole is determined by the diameter of the cylindrical portion of the washer member and the through hole. Therefore, it is desirable to appropriately set these dimensions on the basis of the maximum amount of axial deviation assumed in a part where the joint is actually used.

  For example, in joining between a foundation pile and a steel column, the maximum amount of axial misalignment currently occurring when the foundation pile is buried is 50 to 60 mm. What is necessary is just to make the design dimension of a member and a through-hole respond | correspond to the slit-shaped bolt hole from which the slidable maximum length of a bolt will be 60 mm.

  In addition, normally, the number of bolting portions is at least as many as necessary joining strength is obtained. In the present invention, the through hole of the first joint plate serving as the bolting portion is the first columnar shape assumed as described above. Since it is determined by the maximum amount of axial displacement of the member, it has a diameter that is significantly larger than the conventional case where a bolt hole having a diameter that allows only a bolt to pass therethrough is formed. It cannot be increased. Accordingly, the bolting points can be appropriately set in accordance with the dimensions of the columnar member and the joint plate so that the through holes can be arranged with appropriate intervals and the necessary and sufficient bonding strength can be obtained.

  In the first joint plate of the present invention, a plurality of large through holes are formed as described above, and the washer member fitted into the through holes is made of high tensile steel like the anchor bolt. Therefore, there is no problem in the strength of the first joint plate itself.

  In addition, the planar shape of the first, second, and third joint plates in the present invention is not particularly limited, and various shapes such as various polygonal shapes, circular shapes, and elliptical shapes can be adopted. Appropriately selected in consideration of strength, simplicity of process, efficiency, etc., such as the arrangement and manufacture of bolt holes, the positioning of upper and lower plates on site, etc., depending on the cross-sectional shape of the columnar members to be joined do it. For example, when used to join a steel pillar with a square cross-sectional outer shape to the foundation pile, it is an efficient and uniform arrangement and manufacturing process of the bolt holes to have a substantially square shape similar to the conventional joint plate, It is preferable because of easy handling in position adjustment during bonding.

  The case where the joint as a 1st Example of this invention is used for joining the foundation pile buried in the ground and the steel frame standing up on it is shown below. Therefore, in this embodiment, the foundation pile is the first columnar member, and the steel column is the second columnar member. Moreover, in a present Example, the case where the fitting fixation of a 1st joint plate is performed with the cylinder part fitted to the head outer periphery of a foundation pile, and the split nut member which fastens the circumference of this cylinder part with a volt | bolt is illustrated.

  2A and 2B are schematic perspective views showing components of the joint in the present embodiment, in which FIG. 2A is an overall configuration diagram, FIG. 2B is a side view of the washer member, and FIG. 2C is a bottom view of the washer member. 3A and 3B are explanatory views showing a joined state by the present joint, wherein FIG. 3A is a schematic perspective view seen from the steel column side, and FIG. 3B is a schematic perspective view seen from the foundation pile side.

  As shown in FIG. 2, the joint according to the present embodiment is mainly welded and fixed to a lower end portion of the steel column 201 in advance in a factory or the like so that the surface thereof is located in a plane perpendicular to the axial direction of the column 201. The substantially square plate-like second joint plate 20 is fitted and fixed to the head of the foundation pile 101 by a fitting portion and fixing means so that the surface thereof is located in a plane perpendicular to the axial direction of the foundation pile 101. A substantially rectangular plate-shaped first joint plate 10, a cylindrical portion 11 integrally provided as a fitting portion from the back surface of the first joint plate 10 in the hanging direction, and a plurality of bolts around the cylindrical portion 11 The first joint plate 10 is used to fasten the split nut member 30 as a fixing means, the first joint plate 10 and the second joint plate 20 facing each other. And formed through-holes 13 formed in the second anchor bolts 18 and nuts 19 that is inserted through the washer member 14 to the bolt holes 21 formed in the joint plate 20.

  The cylindrical portion 11 serving as a fitting portion has an inner diameter that substantially matches the outer peripheral diameter of the foundation pile head portion 101, and a slit-shaped notch 12 formed in parallel with the axis from the lower end upward is circular in cross section over the entire circumference. Are provided at equal angular intervals. In the present embodiment, several reinforcing ribs R are provided on the back surface of the first joint plate 10 at a right angle portion formed between the outer surface of the cylindrical portion 11. Of course, the rib R is not necessarily provided if it is sufficiently strong or strong enough not to be reinforced.

  The first joint plate 10 is formed with a total of eight through-holes 13 having a large diameter at predetermined intervals around the cylindrical portion 11 so that there are three along one side. The washer member 14 includes a columnar portion 15 that is rotatably inserted into the through hole 13 and a concentric disc-shaped portion 16 having a larger diameter than the cylindrical portion 15. When the columnar portion 15 is inserted into the through hole 13 from the pile side, the disk-shaped portion 16 protruding to the outer peripheral area of the columnar portion 15 comes into contact with the periphery of the through hole 13 on the back surface of the first joint plate 10 and stops.

  The washer member 14 is provided with slit-like bolt holes 17 extending from the centers of the columnar portion 15 and the disc-like portion 16 to the outer peripheral side along the radial direction. The position of the central axis (concentric with the cylindrical portion 15 and the disc-shaped portion 16) that is the inner end of the washer member of the bolt hole 17 coincides with the central position of the through hole 13 into which the cylindrical member 15 is fitted. When the bolts 18 are inserted into the corresponding bolt holes 21 formed on the second joint plate 20 side at the center axis positions of the washer members 14 in the holes 13 and fastened with the nuts 19, the first and second joint plates The center positions of the steel columns 201 are fixed by welding so that the center positions of (10, 20) overlap and the center position of the foundation pile 101 that overlaps the center position of the first joint plate 10 and the center position of the second joint plate 20 overlap. The axis is set to be coaxial.

  In the present embodiment, the bolt 18 can be slid along the radial direction from the center axis position of the inner end portion thereof to the outer peripheral end portion in the slit-like bolt hole 17, so that any arbitrary radial direction can be obtained. The first joint plate 10 and the second joint plate 20 can be eccentrically stopped by the bolt 18 at the position.

  Therefore, according to the joint of the present embodiment, the foundation pile 101 and the steel column 201 can be joined by shifting the center axes of the foundation pile 101 by the amount of eccentricity, as shown in FIG. When the foundation pile 101 (first columnar member 100) buried in the previous ground has shifted to a position A ′ different from the design position A whose center axis is determined in advance. The axial displacement of the bolt 18 is compensated for, and the steel column 201 (second columnar member 200) is erected on the foundation pile at a position where the central axis overlaps the design position A. Can be joined.

  The work process in the case of joining the foundation pile 101 and the steel column 201 embedded by shifting the axis by the joint of the present embodiment having the above configuration will be described below. First, the foundation pile 101 made of a cylindrical steel pipe after being buried in the ground has a predetermined design height in a state where the periphery of the head exposed on the ground is dug to a predetermined depth over a predetermined area. The position of this foundation pile 101 is measured and the amount of axial deviation from the design position and the direction of deviation are obtained.

  The cylindrical portion 11 of the first joint plate 10 is fitted into the head of the foundation pile 101 whose height has been adjusted, and the split nut member 30 is overlapped around the cylindrical portion 11 covering the head of the foundation pile 101 and tightened with a bolt. . At this time, the cylindrical portion 11 is reduced in diameter by the plurality of slit-shaped notches 12 formed in the cylindrical portion 11, and the fitting portion of the cylindrical portion 11 with respect to the head of the foundation pile 101 is in a firmly fixed state, Fixation of the first joint plate 10 to the head of the foundation pile 101 is completed.

  Next, the second joint plate 20 welded and fixed to the lower end of the steel column 201 is made to face the surface of the first joint plate 10, and the steel column 201 is aligned so that the central axis thereof matches the designed central axis position. In this state, the first and second joint plates (10, 20) are brought into contact with each other. At this time, each bolt hole 21 formed in the second joint plate 20 comes to an eccentric position separated from the center of each corresponding through-hole 13 of the first joint plate 10 by the axial displacement.

  Therefore, in the contact state between the joint plates (10, 20), the cylindrical portion 15 of the washer member 14 is inserted into each through hole 13 of the first joint plate 10 from the back surface side (ground side), and the slit is inserted. The position is adjusted by rotating so that the longitudinal direction (radial direction) of the cylindrical bolt hole 17 is along the direction of the axial displacement.

  By this position adjustment, each bolt hole 21 of the second joint plate 20 corresponds to each other but overlaps the radial direction of the slit-like bolt hole 17 of the washer member 14, so that the anchor bolt 18 made of high strength steel is attached at this eccentric position. By passing through the slit-shaped bolt hole 17 of the washer member 14 to the bolt hole 21 of the second joint plate 20 and fastening with the nut 19, the first joint plate 10 and the second joint plate 20 are bolted, and the foundation pile The joining of 101 and the steel column 201 is completed.

  As described above, if the joint in the present embodiment is used, the foundation pile that has been buried with the axis shifted from the design position is inserted into the through hole of the first joint plate that is fixed to the foundation pile side. By rotating the washer member to be inserted and adjusting the direction of the slit-shaped bolt hole and the bolt insertion position, the steel strut is joined while compensating for the axial displacement, and the design position is accurate. Can stand up well.

  The length in the longitudinal direction of the slit-like bolt hole 17 is assumed to be the axial deviation that occurs when the first columnar member is positioned and fixed, with the dimension excluding the diameter of the bolt 18 within which the bolt 18 is slidable. If it is set to the maximum value that can be set, the axial displacement can be compensated for by joining by this joint in most sites. For example, in the present embodiment, the dimensions within which the bolt 18 can slide are set to correspond to the maximum value 50 to 60 mm obtained empirically in the amount of shaft misalignment that occurs when the foundation pile 101 is buried in the present situation. 60 mm is desirable.

  Further, a means for fixing the relative eccentric position of the first joint plate 10 relative to the second joint plate 20 may be further provided. For example, as shown in FIG. 1, both joint plates are fixed by fixing means for holding the second joint plate 20 eccentrically positioned with respect to the first joint plate 10 from the front-rear direction or the left-right direction with a fixing bolt 32 via a fixing plate 31. The relative positional relationship of can be maintained more stably.

  In the present embodiment, the first joint plate and the second joint plate are directly fastened and fixed by bolts. However, as shown in FIG. 4, both joint plates are fastened via the third joint plate 40. It is good also as a structure to perform.

  In this case, the third joint plate 40 is first fixed to the first joint plate 10 at an eccentric position so as to compensate for the axial displacement of the foundation pile 101, and then the second joint plate 20 is attached to the third joint plate 40. It is assumed that the foundation pile 101 and the steel column 201 are joined by fixing the center axes together.

  As described above, according to the configuration via the third joint plate 40, the work of adjusting the direction of the slit-like bolt 17 of the washer member 14 with respect to the first joint plate 10 and the eccentric position of the bolting is free. Therefore, the operation is simpler than the case where the second joint plate 20 with the steel column 201 is directly applied.

  Since the space around the head of the foundation pile 101 is dug by a predetermined depth over a predetermined range at the start of work, the first joint plate 10 is fixed to the head after the first joint plate 10 is fixed. The soil excavated in the space when the fixing with the two joint plates 20 is completed is backfilled. At this time, there is a case where the periphery of the first joint plate 10 is placed over the design area.

  In the first embodiment, the fitting portion for fixing the first joint plate to the foundation pile head portion is a cylindrical portion that is fitted so as to be covered around the head portion. If it is cylindrical, the structure which inserts and fits this fitting part in the cylindrical head part is also considered.

  As a second embodiment of the present invention, as a configuration for fitting and fixing to the first joint plate foundation pile head, as a fitting portion inserted and fitted into the cylindrical head of the foundation pile as described above FIG. 5 shows a joint provided with a cylindrical member and a wedge member that constitutes a chuck mechanism that is inserted into the cylindrical portion from below and pushes the cylindrical portion from the inside as means for fixing the cylindrical portion. Fig.5 (a) is a schematic plan view which shows the fitting fixed state to the foundation pile head part of the 1st joint plate of a present Example, (b) is the schematic sectional side view.

  In the second embodiment, the basic configuration is the same as that of the first embodiment except for the fitting portion between the cylindrical portion and the wedge member and the fixing means. That is, a second joint plate (not shown) having a substantially quadrangular plate shape, which is welded and fixed to a lower end portion of a steel column in advance in a factory or the like so that its surface is located in a plane perpendicular to the axial direction of the column, A substantially rectangular plate-like first joint plate 50 fitted and fixed to the head of the foundation pile 101 by a joint and fixing means so that the surface thereof is positioned in a plane orthogonal to the axial direction of the foundation pile 101; 1-3, through holes 56 formed in the first joint plate 50 and bolt holes formed on the second joint plate side in order to fasten the first joint plate 50 and the second joint plate in a face-to-face relationship. It is mainly composed of an anchor bolt 18 and a nut 19 inserted through the washer member 14 shown.

  In the present embodiment, an opening hole 55 is formed in the center portion of the first joint plate 50, and the cylindrical portion 51 serving as a fitting portion is integrally formed coaxially with the opening hole 55 on the back surface of the first joint plate 50. Is provided. The cylindrical part 51 has a concave part communicating with the opening hole 55 in the upper part, and a slit-shaped notch parallel to the cylindrical part axis from the lower end upward at equal angular intervals of a circular cross section. A plurality of 52 are formed over the entire circumference, and the inner diameter increases in a tapered shape toward the lower end opening in the lower region.

  A wedge member 60 having a tapered outer peripheral shape having the same inclination as that of the enlarged diameter portion 53 is fitted into the enlarged diameter portion 53, and the wedge member 60 is screwed to the bottom plate 54 of the recess by a bolt 61 and a nut 62. Has been. Since the nut 62 screwed onto the end of the bolt 61 penetrating the wedge member 60 and the bottom plate 54 from below is exposed in the opening hole 55 of the first joint plate 50, The nut 62 can be screwed and rotated from the outside.

  Accordingly, when the nut 62 is screwed and rotated, the bolt 61 becomes a feed screw and moves in the direction approaching the bottom plate 54 with the wedge member 60, and the wedge member 60 is further pushed into the cylindrical portion 51. Will be. When the wedge member 60 is pushed into the cylindrical portion 51, the lower region of the cylindrical portion 51 is expanded by the slit-shaped notch 53. Therefore, if the cylindrical portion 51 into which the wedge member 60 is fitted from the lower opening is inserted into the head of the foundation pile 101, and the nut 62 exposed in the opening hole 55 is screwed and rotated, the wedge member is obtained. The lower region of the cylindrical portion 51 increases in diameter as the 60 is pushed, and the cylindrical portion 51 is pressed against the head of the foundation pile 101 from the inside like a chuck grip to obtain a strong fitting and fixing state. .

  As described above, with respect to the first joint plate 50 fixed to the head of the foundation pile 101 by the cylindrical portion 51 and the wedge member 60, the second joint plate 20 is subsequently used in the same process as in the first embodiment. By fastening the bolts through the washer member 14, even if the foundation pile 101 is displaced from the designed embedding position, the steel strut 201 can be joined at the designed position by compensating for the misalignment.

  Further, the fixing means by the chuck mechanism using the wedge shape may be configured to tighten the head of the foundation pile from the outside. As a third embodiment of the present invention, FIG. 6 shows a case where the cylindrical portion constituting the fitting portion of the first joint plate is a wedge portion. FIG. 6A is a side sectional view showing a state in which the first joint plate is fitted and fixed to the foundation pile head, and FIG. 6B is a diagram showing a ring screw for moving the fastening ring relative to the cylindrical portion. It is the top view seen from the back side of 1 joint plate.

  As in the first embodiment, the first joint plate 10 according to the present embodiment is integrally provided with a cylindrical portion 70 as a fitting portion in the hanging direction from the back surface, and around the end of the steel column 201. A predetermined number of through-holes 13 into which washer members 14 having bolt holes 17 for fastening with anchor bolts in a face-to-face manner with the second joint plate 20 fixed in advance to the part are fitted. The cylindrical portion 70 has an inner diameter that substantially matches the outer peripheral diameter of the head of the foundation pile 101, can be fitted so as to cover the head of the foundation pile 101, and is formed parallel to the axis from the lower end upward. A plurality of slit-shaped notches 72 are provided at equal angular intervals with a circular cross section over the entire circumference.

  In the present embodiment, the cylindrical portion 70 includes an outer diameter-reduced portion 71 whose outer diameter is reduced in a taper shape over a predetermined region from the substantially central position in the axial direction downward toward the foundation pile 101 side. Further, a male thread processing portion 43 is formed on the outer surface below the end portion below the end portion. Further, a tightening ring 80 having a tapered inner shape with the same inclination as that of the reduced diameter portion 71 is fitted to the outer side of the reduced diameter portion 71, and a male thread processing portion 73 below the screw is engaged with this. A ring screw 81 in which an internal thread surface 82 is applied to the inner peripheral surface is disposed.

  Therefore, when the ring screw 81 is moved by being screwed and rotated upward along the axial direction with respect to the cylindrical portion 70, the ring screw 81 moves the fastening ring 80 upward with respect to the cylindrical portion 70. Along with this, the lower region of the cylindrical portion 70 is tightened, and the diameter is reduced by the slit-shaped notch 72, and the cylindrical portion 70 is strongly tightened and pressed from the outside against the head of the foundation pile 101, A strong and fixed state can be obtained. Thus, with respect to the cylindrical portion 70 as the fitting portion, the outer diameter-reduced portion 71, the tightening ring fitted in this region, the lower male screw processing portion 73, and the ring screw 81 screwed to this are shown in this embodiment. The fixing means is configured.

  In the state in which the cylindrical portion 70 is firmly fitted and fixed to the head of the foundation pile 101 by the fitting portion and the fixing means described above, the surface of the first joint plate 10 is orthogonal to the axial direction of the foundation pile 101. In the following, as in the above embodiment, even if the foundation pile 101 has been buried with the axis shifted from the design position, the second joint plate is made to face the first joint plate 10. By fixing the first and second joint plates while compensating for the axial displacement in a simple process of adjusting the direction of the slit-shaped bolt hole 17 of the washer member 14 and the insertion position of the anchor bolt 18. The steel strut 201 can be joined to the foundation pile 101 so as to be erected with high accuracy at the design position.

  In the above embodiment, in the case of joining a foundation pile made of a cylindrical steel pipe and a steel column, as a fitting portion of the first joint plate, a cylindrical portion fitted to the head shape of the foundation pile; Although a joint configuration provided with means for fastening it with a split nut or fixing with a chuck mechanism with a wedge member is shown, it is not limited to this in the present invention, depending on the head shape of the columnar members to be joined. Any mechanism that can be easily fitted and fixed can be used.

It is explanatory drawing which shows the positional relationship at the time of fixation of the 1st and 2nd joint plates by the joint of this invention, (a) is a top view schematic diagram which shows the overlap of a 1st and 2nd joint plate, (b) ) Is a schematic side view. It is a perspective view which shows the structure of the joint by 1st Example of this invention, (a) is a schematic perspective view of the whole structural member, (b) is a side view of a washer member, (c) is a bottom view of a washer member. is there. It is a perspective view which shows the joining state of the foundation pile and steel pillar by the joint of 1st Example, (a) is the perspective view seen from the steel pillar side, (b) is the perspective view seen from the foundation pile side. . It is a perspective view which shows the other example of joining by the joint of 1st Example. It is explanatory drawing which shows the structure of the fitting part and fixing means of the joint by 2nd Example of this invention, (a) is the top view which looked at the 1st joint plate fixed to the foundation pile head from the upper surface side, (B) is a side view. It is explanatory drawing which shows the structure of the fitting part of a joint by 3rd Example of this invention, and the structure of a fixing means, (a) is a sectional side view of the 1st joint plate fixed to the foundation pile head, (b) It is a top view of the ring screw which comprises a fixing means. It is a schematic perspective view explaining joining of the foundation pile and the steel frame pillar by the conventional joint. It is a schematic perspective view explaining the case of the joining of the foundation pile with an axial gap by a conventional joint, and a steel frame support.

Explanation of symbols

10, 50: 1st joint plate 11, 51, 70: Cylindrical part (fitting part)
12, 52, 72: slit-shaped notches 13, 56: through-hole R: rib 14: washer member 15: columnar portion 16: disk-shaped portion 17: slit-shaped bolt hole 18: anchor bolt 19: nut 20: second Joint plate 21: Bolt hole 30: Split nut 31: Fixing plate 32: Fixing bolt 40: Third joint plate 53: Expanded diameter part (lower part of cylindrical part)
54: Recessed bottom plate 55: Opening hole 60: Wedge member 61: Bolt 62: Nut 71: Outer diameter reduced portion 73: Male screw machining portion 80: Tightening ring 81: Ring screw 82: Female screw machining 100: First columnar member 101 : Foundation pile 102: Pile side joint plate 103, 203: Bolt hole 104: Anchor bolt 200: Second columnar member 201: Steel column 202: Column side joint plate

Claims (3)

A joint for joining ends of the first columnar member and the second columnar member,
A fitting portion that is fitted to an end portion of the first columnar member that performs the joining; and a fixing unit that fixes the fitting portion to an end portion of the first columnar member;
The fitting portion is integrally formed with the fitting portion so that the surface thereof is located in a plane orthogonal to the axial direction of the first columnar member in the fitted and fixed state, and a through-hole having a predetermined diameter is formed by the fitting. A plurality of plate-like first joint plates formed around the joint;
A plate-like second joint plate that is welded and fixed in advance so that the surface thereof is positioned in a plane orthogonal to the axial direction of the columnar member at the end of the second columnar member to be joined;
In order to fasten the first joint plate or the third joint plate fixed to the first joint plate and the second joint plate in a face-to-face state, a washer member is inserted into each through hole from the first joint plate side. A bolt inserted through and a nut screwed into the bolt,
The washer member includes a columnar portion that is rotatably inserted into the through hole, a disk-shaped portion that has a larger diameter than the columnar portion and is integrally formed concentrically with the columnar portion, and these circles. The columnar part and the disk-shaped part are drilled so as to extend radially outward from the center axis position of the columnar part, and have a width in which the bolt can be inserted and slide in the radial direction when the bolt is inserted. A columnar member joining joint, comprising: a movable slit-like bolt hole. The fitting portion includes a cylindrical portion that is integrally provided so that the axial direction extends along the hanging direction from the back surface of the first joint plate,
The cylindrical portion has an inner diameter that substantially matches the outer peripheral diameter of the end portion of the first columnar member, and slit-shaped notches formed in parallel with the shaft center from the lower end to a predetermined interval over the entire circumference. There are multiple
The columnar member joining joint according to claim 1, wherein the fixing means includes a split nut member that is fastened with a plurality of bolts around the cylindrical portion. The first joint plate has a circular opening hole in the center;
The fitting portion includes a cylindrical portion integrally provided coaxially with the opening hole on the back surface of the first joint plate,
When the end portion of the first columnar member has a cylindrical shape, the cylindrical portion expands in a tapered shape toward an upper area having a uniform inner diameter and a lower end opening that substantially matches the inner diameter of the end portion. And a plurality of slit-shaped notches formed in parallel with the shaft center from the lower end to the upper side at predetermined intervals over the entire circumference, and the first joint on the upper side. A bottom plate is provided that forms a recess communicating with the opening hole of the plate,
The fixing means includes a substantially conical wedge member fitted from below the cylindrical portion, and a bolt and a nut for fixing the wedge member to the bottom plate exposed to the opening hole,
The wedge member is fixed so as to be adjustable in position along the axial direction by tightening a nut from an upper side of the bottom plate with an end of a bolt penetrating the wedge member and the bottom plate from below. The columnar member joining joint according to claim 1.

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