Connector, connection structure, and manufacturing method for connection structure

Abstract

To provide a connector that can be easily installed for an existing PC steel material.SOLUTION: There is provided a connector used to connect a first PC steel material and a second PC steel material, and the connector comprises a female member which has a first fixture insertion hole as a through hole into which a first fixture gripping the first PC steel material can be inserted, a male member configured to be inserted between the first fixture and an inner peripheral surface of the first fixture insertion hole, and a plate-like wide anchor plate which is arranged between the female member and an anchor plate supporting the first fixture, and has a first through hole into which the first fixture can be inserted, wherein the area of a region encircled with an outer edge of a surface of the wide anchor plate which faces the female member is larger than the area of a region encircled with a surface of the female member which faces the wide anchor plate.SELECTED DRAWING: Figure 1A

Description

[Technical field]

[0001] The present disclosure relates to a connector, a connection structure, and a method for manufacturing a connection structure. [Background technology]

[0002] Patent Document 1 proposes a connection structure for PC steel strands in which two PC steel strands are connected together. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2008-45280 A Summary of the Invention [Problem to be solved by the invention]

[0004] For the purpose of expanding the width of bridge girders or buildings, etc., a connection structure is being considered in which new prestressing steel members to be used in the expanded sections are connected by connectors to existing prestressing steel members buried in bridge girders, etc.

[0005] The connection between the existing and new prestressing tendons is carried out by removing the concrete structures, etc., that cover the ends of the existing prestressing tendons, and then installing connectors on the existing prestressing tendons. However, the surfaces of the anchor plates installed on the existing prestressing tendons and the concrete structures around the anchor plates that are exposed by removing the concrete structures, etc., may not be flat.

[0006] On the other hand, the connector used to connect the PC steel members comes into contact with the anchor plate and the surface of the concrete structure around the anchor plate. Therefore, if the surface of the anchor plate is not flat, the position of the connector may shift during or after installation, making it difficult to install the connector.

[0007] Therefore, an object of the present disclosure is to provide a connector that can be easily installed on existing PC steel members. [Means for solving the problem]

[0008] The connector of the present disclosure is a connector used when connecting a first PC steel member and a second PC steel member, a female member having a first fastening tool insertion hole, which is a through hole into which a first fastening tool that grips the first PC steel member can be inserted; a male member configured to be insertable between the first fastener and an inner circumferential surface of the first fastener insertion hole; a plate-shaped widening anchor plate disposed between the female member and an anchor plate supporting the first fixing tool and having a first through hole into which the first fixing tool can be inserted; The area of ​​the region surrounded by the outer edge of the surface of the widening anchor plate facing the female member is larger than the area of ​​the region surrounded by the outer edge of the surface of the female member facing the widening anchor plate. Effect of the Invention

[0009] According to the present disclosure, it is possible to provide a connector that can be easily installed on existing PC steel members. [Brief description of the drawings]

[0010] [Figure 1A] FIG. 1A is an illustration of a connector according to one embodiment of the present disclosure. [Figure 1B] FIG. 1B is an illustration of a connector according to one embodiment of the present disclosure. [Diagram 2] FIG. 2 is a view taken along block arrow A in FIG. 1A. [Diagram 3] FIG. 3 is an explanatory diagram of a connection structure including the connector shown in FIG. 1A. [Figure 4] FIG. 4 is an explanatory diagram of a connector according to one embodiment of the present disclosure. [Diagram 5] FIG. 5 is an explanatory diagram of a connection structure including the connector shown in FIG. [Figure 6]FIG. 6 is an explanatory diagram of a connection structure including the connector shown in FIG. [Figure 7] FIG. 7 is a flow diagram of a method for manufacturing a connection structure according to one embodiment of the present disclosure. [Figure 8] FIG. 8 is a flow diagram of a method for manufacturing a connection structure according to one embodiment of the present disclosure. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0011] The embodiments for carrying out the invention are described below.

[0012] [Description of the embodiments of the present disclosure] First, the embodiments of the present disclosure will be described. In the following description, the same or corresponding elements are denoted by the same reference numerals, and the same description thereof will not be repeated.

[0013] (1) A connector according to one embodiment of the present disclosure is a connector used to connect a first PC steel member and a second PC steel member, a female member having a first fastening tool insertion hole, which is a through hole into which a first fastening tool that grips the first PC steel member can be inserted; a male member configured to be insertable between the first fastener and an inner circumferential surface of the first fastener insertion hole; a plate-shaped widening anchor plate disposed between the female member and an anchor plate supporting the first fixing tool and having a first through hole into which the first fixing tool can be inserted; The area of ​​the region surrounded by the outer edge of the surface of the widening anchor plate facing the female member is larger than the area of ​​the region surrounded by the outer edge of the surface of the female member facing the widening anchor plate.

[0014] According to a connector according to one embodiment of the present disclosure, the arrangement of the female and male components is stabilized, changes in their positions are suppressed, and the connector can be easily installed on the first PC steel member.

[0015] (2) In (1), the widening anchor plate may include a fixing member for installing a covering member that covers at least the female member, the male member, and the first fastener.

[0016] The widening anchor plate has a fixing member, which makes it possible to easily install the covering member.

[0017] (3) In the item (2), a coupler sheath is further provided as the covering member, The coupler sheath may be fixed to the widening anchor plate by the fixing member.

[0018] A connector according to one aspect of the present disclosure has a coupler sheath, and by fixing it to a fixing member of a widening anchor plate, the coupler sheath can be easily installed in accordance with the design.

[0019] (4) In any one of (1) to (3), a filling member may be disposed between the anchor plate and the width-expanding anchor plate.

[0020] The connector has a filling member which stabilizes the arrangement of the widening anchor plate, female member and male member, particularly preventing their positions from changing, making it easy to install the connector on the first PC steel member.

[0021] (5) In any one of (1) to (4), the widening anchor plate may have a protrusion at a portion that comes into contact with the anchor plate.

[0022] By having a convex portion in the widening anchor plate, direct contact of the widening anchor plate with the surface of the concrete structure is prevented, and changes in the positions of the widening anchor plate, female component, and male component can be particularly prevented.

[0023] (6) In any one of (1) to (5), the female member may include a first connecting member including one or more selected from a groove portion and a ridge portion.

[0024] By having the first connecting member, the female member can be easily connected to another member such as a joint.

[0025] (7) In (6), the present invention may further include a joint having a second connecting member that fits into the first connecting member and is connected to the female member and a second fixing device that grips the second PC steel member.

[0026] The connector according to one embodiment of the present disclosure includes a joint, which makes it easy to connect the first PC steel member and the second PC steel member.

[0027] (8) In (7), the joint is A first joint including a first end and a second end that are ends along a longitudinal direction, the first end having the second connection member on a side surface thereof and the second end having a first male screw portion on a side surface thereof; a second joint; the first joint is inserted into a second opening of the first fastening tool insertion hole of the female member, the second opening being located opposite to a first opening into which the first fastening tool is inserted; the first connection member is disposed on an inner circumferential surface of the second opening of the first fastening tool insertion hole, The second joint may have a third end and a fourth end, which are both ends along the length, and may have a first female threaded portion on the inner surface of a recess provided in the third end that engages with the first male threaded portion, and a second female threaded portion on the inner surface of a recess provided in the fourth end that engages with a second male threaded portion provided on the outer periphery of a second fixing device that grips the second PC steel material.

[0028] By the joint having the first joint and the second joint, a connection structure that connects the first PC steel member and the second PC steel member can be easily installed.

[0029] (9) In (7), the joint is a first joint end and a second joint end that are ends along a longitudinal direction, the first joint end being disposed at the first joint end, and the first recess into which the female member is inserted; a second PC steel material gripping portion provided at the second joint end portion and configured to grip an end portion of the second PC steel material, the female member has the first connecting member on an outer surface along the first fastener insertion hole, The first recess may include the second connecting member on an inner circumferential surface.

[0030] By providing the joint with the second connecting member that fits into the first connecting member of the female member, and the second PC steel member holding portion, the connection structure connecting the first PC steel member and the second PC steel member can be easily installed.

[0031] (10) A connection structure according to one embodiment of the present disclosure is a connection structure in which a first PC steel member and a second PC steel member are connected, The first PC steel member; The second PC steel material; a connector that connects the first PC tendon and the second PC tendon, The connector comprises: a female member having a first fastening tool insertion hole, which is a through hole into which a first fastening tool that grips the first PC steel member can be inserted; a male member configured to be insertable between the first fastener and an inner circumferential surface of the first fastener insertion hole; a plate-shaped widening anchor plate disposed between the female member and an anchor plate supporting the first fixing tool and having a first through hole into which the first fixing tool can be inserted; a joint connected to the female member and a second fixing tool that grips the second PC steel member, The area of ​​the region surrounded by the outer edge of the surface of the widening anchor plate facing the female member is larger than the area of ​​the region surrounded by the outer edge of the surface of the female member facing the widening anchor plate, the female member includes a first connecting member including at least one selected from a groove portion and a ridge portion; The joint includes a second connecting member that mates with the first connecting member.

[0032] According to a connection structure according to one aspect of the present disclosure, the arrangement of the female and male components is stabilized, changes in their positions are suppressed, and installation can be easily performed.

[0033] (11) A manufacturing method of a connection structure according to one aspect of the present disclosure is a manufacturing method of a connection structure in which a first PC steel member and a second PC steel member are connected by a connector, the manufacturing method comprising: The connector comprises: a female member having a first fastening tool insertion hole, which is a through hole into which a first fastening tool that grips the first PC steel member can be inserted; a male member configured to be insertable between the first fastener and an inner circumferential surface of the first fastener insertion hole; a plate-shaped widening anchor plate disposed between the female member and an anchor plate supporting the first fixing tool and having a first through hole into which the first fixing tool can be inserted; The method for manufacturing the connection structure includes: an installation step of installing the widening anchor plate through the first fixing tool of the first PC tendon into the first through hole; a female member installation step of installing the female member such that the first fixing tool is positioned in the first fixing tool insertion hole of the female member; a male member installation step of inserting the male member between the first fixing tool and the female tool in the first fixing tool insertion hole, The area of ​​the region surrounded by the outer edge of the surface of the widening anchor plate facing the female member is larger than the area of ​​the region surrounded by the outer edge of the surface of the female member facing the widening anchor plate.

[0034] According to the manufacturing method of the connection structure according to one aspect of the present disclosure, the arrangement of the female and male components can be stabilized and changes in their positions can be suppressed, making it possible to easily manufacture the connection structure.

[0035] (12) In (11), the method may further include a filler member installation step of disposing a filler member between the anchor plate and the width-expanding anchor plate.

[0036] By carrying out the filling member installation process, changes in the positions of the widening anchor plate, female member, and male member are particularly suppressed, making it possible to easily install the connector on the first PC steel member.

[0037] (13) In the method according to (11) or (12), a joint installation step is performed to install a joint that connects the female member and a second fixing tool that grips the second PC steel member. and a coupler sheath installation step of installing a coupler sheath covering the female member, the male member, the first fixing device, the second fixing device, and the joint on the widening anchor plate, In the coupler sheath installation step, the coupler sheath may be fixed to the width-expanding anchor plate by a fixing member provided on the width-expanding anchor plate.

[0038] By carrying out the joint installation process, the connection structure that connects the first and second PC steel members can be easily manufactured. In the coupler sheath installation process, the coupler sheath is installed to protect the connection structure.

[0039] (14) In (13), the joint installation step may include a fixing step of pushing the male member between the female member and the first fixing tool.

[0040] By carrying out the fixing step in the joint installation step, the connector can be firmly fixed to the first fixing tool.

[0041] [Details of the embodiment of the present disclosure] A specific example of a connector, a connection structure, and a method for manufacturing a connection structure according to an embodiment of the present disclosure (hereinafter referred to as the present embodiment) will be described below with reference to the drawings. The present invention is not limited to these examples, but is defined by the claims, and is intended to include all modifications within the meaning and scope equivalent to the claims.

[0042] In this specification, there are cases where components are described with '1st', '2nd', etc. added to their names, such as '1st PC tendon material', '2nd PC tendon material', etc. The '1st', '2nd', etc. are written merely to identify each component, and do not refer to the arrangement, priority order, etc.

[0043] 〔connector〕 The connector according to this embodiment will be described with reference to FIGS. 1A to 6. FIG.

[0044] The drawings are schematic diagrams for explaining the connector, the connection structure, and the manufacturing method of the connection structure, and do not accurately depict the sizes, etc.

[0045] Fig. 1A is a cross-sectional view taken along a plane passing through a central axis CA of a first PC steel member 12 of a connector 10. Fig. 1A corresponds to a cross-sectional view taken along line BB in Fig. 2. Fig. 1B corresponds to a modified example of the widening anchor plate in Fig. 1A. Fig. 2 is a view taken along block arrow A in Fig. 1A. Fig. 3 is an explanatory diagram of a connection structure including a connector of this embodiment.

[0046] Fig. 4 is a modified example of the connector of this embodiment and is a cross-sectional view taken along a plane passing through the central axis CA of the first PC steel member 12. Figs. 5 and 6 are explanatory views of a connection structure including the connector shown in Fig. 4.

[0047] 1A to 6, the axis along the longitudinal direction of first PC steel member 12 is defined as the X-axis, and the plane perpendicular to the longitudinal direction of first PC steel member 12 is defined as the YZ plane.

[0048] In the following description, the connector of this embodiment will be described mainly with reference to Figures 1A, 2, and 3, and modified examples of the connector of this embodiment will be described with reference to Figures 1B, 4, 5, and 6 as necessary.

[0049] First, the first fixing device and the first PC steel member to which the connector of this embodiment is applied will be described. (1) First anchor, first PC steel, anchor plate 1A, a first prestressing steel member 12, which is an existing prestressing steel member, is buried inside a concrete structure 11. The first prestressing steel member 12 can be placed in the concrete structure 11 via a sheath 13, for example, and grout can be filled between the first prestressing steel member 12 and the sheath 13. Examples of grout include cement milk and resin-based grout.

[0050] The first prestressing steel member 12 is a prestressing steel member that introduces prestress, specifically compressive force, to the concrete structure 11, and may be a prestressing steel strand made of multiple strands twisted together, a prestressing steel bar, etc. The PC in the prestressing steel member, etc., stands for prestressed concrete.

[0051] The surface of the first prestressing steel member 12 may be coated with a resin such as an epoxy resin. The first prestressing steel member 12 may be a pregrouted prestressing steel member in which a sheath is attached to the prestressing steel member in advance and resin is filled between the sheath and the prestressing steel member.

[0052] Although the first prestressing steel member 12 has been described above, the same prestressing steel members as those described for the first prestressing steel member 12 can also be suitably used for the second prestressing steel member, which is a newly installed prestressing steel member. The first prestressing steel member 12 and the second prestressing steel member may be of the same type or configuration or may be different. The second prestressing steel member can be selected to match the configuration of the first prestressing steel member so that the first prestressing steel member and the second prestressing steel member are connected and the prestressing force is maintained after the prestressing force has been introduced into the second prestressing steel member.

[0053] The first prestressing steel member 12 is arranged so as to pass through a through hole of an anchor plate 141, which is a plate-like body having a through hole in the center for passing the first prestressing steel member 12 through. An end portion 12A of the first prestressing steel member 12 is gripped by a first fixing device 15 installed on the anchor plate 141.

[0054] The anchor plate 141 is a thick steel piece and can support the tension introduced into the first PC steel member 12. The anchor plate 141 may be embedded in the concrete structure 11 as shown in FIG 1A, or may be disposed on the surface of the concrete structure 11.

[0055] The first fixing tool 15 may have, for example, a first female cone 151 and a first male cone 152 .

[0056] The outer shape of the first female cone 151 is not particularly limited, and may be, for example, a cylindrical shape. The first female cone 151 may have a chamfered portion or the like at the end, and does not have to be cylindrical in the strict geometric sense.

[0057] The first female cone 151 can have a through hole along its central axis through which the first PC steel member 12 and the first male cone 152 are disposed.

[0058] The through hole of the first female cone 151 can have a tapered surface whose diameter increases from a position close to the concrete structure 11 toward the end 12A of the first PC steel member 12, i.e., along the X-axis.

[0059] The first male cone 152 may also have multiple male cone segments divided along the circumference when viewed along the block arrow A from the end 12A of the first PC steel member 12 along the central axis CA of the first PC steel member 12.

[0060] The first male cone 152 has an outer shape corresponding to the through hole having a tapered surface of the first female cone 151, and can have, for example, a truncated cone shape. The first male cone 152 can also have a through hole through which the first PC steel material 12 passes along the central axis.

[0061] The inner surface of the through hole that the first male cone 152 has along the central axis may have irregularities in order to firmly grip the first PC steel member 12, and may also have, for example, a female thread surface.

[0062] By inserting the first male cone 152 between the first female cone 151 and the first PC steel member 12 , the first male cone 152 functions as a wedge, and the first fixing device 15 can be fixed to the first PC steel member 12 .

[0063] For example, when expanding the width of an existing bridge girder, it is preferable to connect the end of the prestressing steel buried in the existing bridge girder part to the end of the prestressing steel used in the expanded part with a connector to form a connection structure. In this specification, the connection structure means a structure in which, for example, the existing prestressing steel and the newly installed prestressing steel are connected by a connector with their longitudinal ends butted together. By using a connection structure, it becomes unnecessary to provide a separate member for fixing the new prestressing steel to be used in the expanded part, for example by demolishing a part of the already constructed bridge girder.

[0064] However, in bridge girders and other structures that were constructed without the assumption of expansion, there were cases where threaded sections or the like were not formed on the outer periphery of the fixing devices that hold the prestressing steel members, making it impossible to install new prestressing steel members.

[0065] The connector of this embodiment relates to a connector used when connecting a first PC steel member and a second PC steel member. The connector 10 of this embodiment can be installed on the outer periphery of a fastener that grips an existing PC steel member without using screws or the like, and can be used when connecting to a new PC steel member. The connector 10 of this embodiment has a female member 16, a male member 17, and an expanded anchor plate 142.

[0066] Each member of the connector will now be described. (2) Components of the connector (2-1) Female member The female member 16 has a first fastening tool insertion hole 161 which is a through hole capable of accommodating a first fastening tool 15 which grips the first PC steel member 12 (see FIG. 1A). (First fastener insertion hole) The inner diameter and shape of the first fixing tool insertion hole 161 can be selected so that the first fixing tool 15 can be housed therein.

[0067] The first fastener 15 can be inserted into the first fastener insertion hole 161 from a first opening 161A located at the first female member end 16A, which is the end of the female member 16 closer to the concrete structure 11. For this reason, the inner diameter D161A of the first opening 161A can be made larger than the outer diameter D15 of the first fastener 15 so that the first fastener 15 can be inserted and accommodated.

[0068] The size etc. of the second opening 161B located at the second female member end 16B opposite the first opening 161A of the first fastening tool insertion hole 161 is not particularly limited and can be selected according to the size of the member to be inserted into the second opening 161B.

[0069] In the first fixing tool insertion hole 161, a region in which the first fixing tool 15 is arranged is defined as a first region 1611. In the first region 1611, the first fixing tool insertion hole 161 preferably has an inner circumferential surface 16C that is a tapered surface. This is so that when the male member 17 is inserted between the first fixing tool 15 and the female member 16, the first fixing tool 15 can be tightened and the connector 10 can be fixed to the first fixing tool 15.

[0070] The male member 17 is inserted from the second opening 161B. Therefore, the inner circumferential surface 16C can be formed as a tapered surface whose diameter increases from the first opening 161A toward the second opening 161B.

[0071] First fastener insertion hole 161 may have two or more regions with different inner diameters or shapes, for example, it may have second region 1612 in addition to first region 1611. The shape and size of second region 1612 may be selected as necessary so that a connecting joint can be inserted therein.

[0072] As shown in FIG. 4, the first fixing tool insertion hole 161 may be composed of only a first region 1611 in which the first fixing tool 15 is disposed. (First connecting member) The female member 16 may also have a first connecting member 162 including one or more selected from a groove and a ridge.

[0073] The position where the first connecting member 162 is installed is not particularly limited, and can be selected according to the installation position of the joint to be connected to the female member 16 .

[0074] 1A, the first connecting member 162 can be provided on the inner circumferential surface 16D of the first fastener insertion hole 161 at the second female member end 16B of the female member 16. Also, the first connecting member 162 can be provided on the outer surface 16E of the female member 16 as shown in FIG.

[0075] The first connecting member 162 can have a shape that fits with a member that connects to the female member 16, such as a second connecting member of a joint. The first connecting member 162 may be a screw.

[0076] Since the female member 16 has the first connecting member 162, other members such as a joint can be easily connected to the female member 16. (jig hole) The female member 16 may have a jig hole 163 for installing a jig or the like used when installing the female member 16 . (2-2) Male member The male member 17 can be configured so as to be insertable between the first fixing tool 15 and an inner circumferential surface 16C of the first fixing tool insertion hole 161 that the female member 16 has.

[0077] The male member 17 functions as a wedge when inserted between the first fixing tool 15 and the female member 16 , and can fix the female member 16 to the first fixing tool 15 .

[0078] The male member 17 may have multiple male member segments 171, 172 divided along the circumferential direction. Although Fig. 1A shows an example in which the male member 17 is divided into two male member segments, the male member 17 may also be divided into three or more male member segments. The male member may not be divided, but may be composed of a single member.

[0079] The male member 17 has a through hole along the central axis, i.e., the X-axis in the figure, that accommodates at least a part of the first fixing device 15. The surface of the male member 17 that faces the first fixing device 15, i.e., the surface that contacts the first fixing device 15, may have irregularities in order to firmly grip the first fixing device 15, and may also have, for example, a female thread surface.

[0080] The through hole of the male member 17 can be selected to have a size capable of receiving the first fastener 15 therein.

[0081] The male member 17 can have an outer shape corresponding to the inner circumferential surface 16C of the first fastener insertion hole 161 of the female member 16. Therefore, the outer surface of the male member 17 can be tapered, and the male member 17 can have an outer shape, for example, a truncated cone shape.

[0082] 1A 。 By having a slit, the male member 17 can be easily deformed when inserted between the first fixing device 15 and the female member 16, and the female member 16 can be firmly fixed to the first fixing device 15. (2-3) Widening anchor plate The widening anchor plate 142 is disposed between the female member 16 and the anchor plate 141 supporting the first fixing tool 15, and has a first through hole 1421 into which the first fixing tool can be inserted.

[0083] When connecting new PC steel members to the existing first PC steel members 12, the fixing devices that hold the first PC steel members 12 and the concrete structures that are provided to protect the anchor plate are removed. However, the surface 141A of the anchor plate 141 and the surface 11A of the concrete structure 11 exposed after the removal may not be flat and may include irregularities. This is because the irregularities occur due to deterioration of the anchor plate 141 over time and when the concrete structure 11 is removed. Furthermore, since the connector used for the connection comes into contact with the anchor plate 141 and the surface of the concrete structure 11 around the anchor plate 141, the arrangement of the female member 16 and the male member 17 is unstable, and it may be difficult to install the connector 10.

[0084] Therefore, the connector 10 has an expanded anchor plate 142. The area of ​​a region 1422A surrounded by an outer edge 1422 of the surface of the expanded anchor plate 142 facing the female member 16 can be larger than the area of ​​a region 164A surrounded by an outer edge 164 of the surface of the female member 16 facing the expanded anchor plate 142. (See FIG. 2.)

[0085] By having the widening anchor plate 142, the female member 16 comes into contact with the anchor plate 141 etc. over a wider area via the widening anchor plate 142 than when the connector 10 does not have the widening anchor plate 142. As a result, the connector 10 stabilizes the arrangement of the female member 16 and the male member 17, suppresses changes in position, and can be easily installed on the existing first PC steel member 12.

[0086] The area of ​​the region 1422A in the widening anchor plate 142 is the area of ​​the region 1422A surrounded by the outer edge 1422, and includes the first through hole 1421. Similarly, the area of ​​the region 164A in the female member 16 is the area of ​​the region 164A surrounded by the outer edge 164, and includes the first fastener insertion hole 161.

[0087] The widening anchor plate 142 can have a plate-like shape. However, as shown in Fig. 1B, the widening anchor plate 142 can have a protrusion 1424 that protrudes more than other parts on a portion that contacts the anchor plate 141, i.e., on a second surface 142B that faces the anchor plate 141. It is preferable that the surface of the protrusion 1424 that contacts the anchor plate 141 is a flat surface.

[0088] The height of the protrusion 1424 is not particularly limited and can be selected depending on the condition of the surface 11A of the concrete structure 11, etc. As shown in Fig. 1B, the protrusion 1424 is preferably provided only on the portion facing the anchor plate 141, and is preferably not provided on the portion facing the concrete structure 11.

[0089] The surface 11A of the concrete structure 11 may include irregularities of about several millimeters. However, by providing the convex portion 1424 to the widening anchor plate 142, it is possible to prevent the widening anchor plate 142 from coming into direct contact with the surface 11A of the concrete structure 11, and it is possible to particularly prevent wobbling of the widening anchor plate 142. Furthermore, it is possible to particularly prevent changes in the positions of the widening anchor plate 142, the female member 16, and the male member 17, and it is possible to easily install the connector 10 on the first PC steel member 12.

[0090] The widening anchor plate 142 may have a recess or a protrusion on the first surface 142A facing the female member 16, which fits with the female member 16. For example, as shown in FIG. 4, the widening anchor plate 142 may have a protrusion 1424 on the first surface 142A facing the female member 16. In this case, the female member 16 may have a recess 165 to fit with the protrusion 1424.

[0091] By providing a protrusion or the like that fits with the female member 16 on the first surface 142A of the widening anchor plate 142 facing the female member 16, the female member 16 etc. can be easily aligned, and the female member 16 and male member 17 can be stably installed.

[0092] In FIG. 1A, the outer edge 1422 of the widening anchor plate 142 is rectangular, but may be circular or have any other shape. (First through hole) The first through hole 1421 is provided so as not to interfere with the existing first fixing tool 15 when the widening anchor plate 142 is installed, and can be configured so that the first fixing tool 15 can be inserted therein. For example, it is preferable that the inner diameter D1421 of the first through hole 1421 is larger than the outer diameter D15 of the first fixing tool 15. However, the widening anchor plate 142 supports the female member 16. For this reason, it is preferable that the inner diameter D1421 of the first through hole 1421 is smaller than the outer diameter D16 of the female member 16.

[0093] The cross-sectional shape of the first through hole 1421 on a plane perpendicular to the central axis CA is not particularly limited, and can be, for example, a circle or a polygon such as a rectangle. A circle does not only mean a perfect circle, but also includes an ellipse. A polygon such as a rectangle also includes a case where some sides, such as a pair of opposing sides, are not straight lines but are curved, such as an arc shape.

[0094] The connector 10 may have a packing such as an O-ring between the inner circumferential surface 1421A of the first through hole 1421 and the first fixing device 15. In the case of an O-ring, a plurality of O-rings may be provided along the X-axis, and may be disposed in a groove provided in the inner circumferential surface 1421A.

[0095] By providing the connector 10 with a packing, the arrangement of the widening anchor plate 142, the female member 16, and the male member 17 can be particularly stabilized, and changes in position can be prevented.

[0096] Furthermore, since the connector 10 has a packing, the filler placed around the connector 10, such as inside the coupler sheath, can be prevented from leaking out from between the anchor plate 141 and the widening anchor plate 142.

[0097] Providing a packing in the connector 10 makes it possible to prevent components originating from the connection structure or from the concrete poured around the second PC steel member 31 from entering the connector 10, for example, between the female member 16 and the male member 17. This makes it possible to prevent the female member 16 and the male member 17 from sticking together before tension is applied to the second PC steel member 31. (Fixing parts) The widening anchor plate 142 may also include a fixing member 1423 for mounting a covering member covering at least the female member 16, the male member 17, and the first fastener 15 (see Figures 1A and 2).

[0098] After the first and second prestressing steel members 12 and 13 are connected by the connector 10, a filler may be placed around the connector 10 to prevent rust and protect the connector 10, etc. For this reason, a coupler sheath that functions as a formwork for the filler may be placed around the female member 16, etc., of the connection structure.

[0099] In addition, in the process of installing the connector 10, a temporary cover or the like may be installed to protect the exposed first fixing tool 15 and the like.

[0100] Therefore, by having the fixing member 1423 in the widening anchor plate 142, covering members such as a coupler sheath and a cover can be easily installed and protected.

[0101] In many cases, the anchor plate 141 is not provided with the fixing members 1423. For this reason, when the widening anchor plate 142 is not provided, it is necessary to form fixing members such as bolt holes in the anchor plate 141.

[0102] However, by having the fixing member 1423 in the widening anchor plate 142, processing of the anchor plate 141 is not required, and the fixing member 1423 can be installed by installing the widening anchor plate 142. Therefore, by having the fixing member 1423 in the widening anchor plate 142, it is possible to easily install the covering member.

[0103] The fixing members 1423 can be installed in the widening anchor plate 142 at a factory or the like when the widening anchor plate 142 is manufactured. Therefore, compared to a case in which fixing members are formed in the anchor plate 141 at the construction site, the fixing members 1423 can be formed in the widening anchor plate 142 with high precision in terms of shape and arrangement.

[0104] Furthermore, there are cases where the size of the anchor plate 141 is small relative to the opening of the covering member. When the anchor plate 141 is small and cannot fully cover the opening of the covering member, part of the opening of the covering member is covered by the concrete structure 11. However, it is difficult to flatten the surface of the concrete structure 11, and when filling the inside of the covering member with a filler, there is also a problem that the filler leaks from the gap between the concrete structure 11 and the covering member.

[0105] In response to this, by using an expanded anchor plate 142 of a size that matches the covering member to be installed, the opening of the covering member can be blocked by the expanded anchor plate 142, and leakage of the filling material, etc. can also be suppressed.

[0106] The fixing member 1423 can be selected depending on the fixing method of the covering member, and can be, for example, a bolt hole, a bolt, a cylindrical guide for inserting the covering member, a screw provided on the side surface of the widening anchor plate 142, etc. When the fixing member 1423 is a screw provided on the side surface of the widening anchor plate 142, it is preferable that the widening anchor plate 142 has a disk shape so that the covering member can be rotated and screwed into the widening anchor plate 142. (2-4) Filling material The connector 10 may further include a filler member 143 disposed between the anchor plate 141 and the widened anchor plate 142 .

[0107] The connector 10 has the filling member 143, which can fill the gap between the anchor plate 141 and the widening anchor plate 142. This particularly stabilizes the arrangement of the widening anchor plate 142, the female member 16, and the male member 17, and particularly prevents their positions from changing, making it easy to install the connector 10 on the first PC steel member 12.

[0108] By providing the connector 10 with the filling member 143, the filling material arranged around the connector 10, such as within the coupler sheath, can be prevented from leaking out from between the anchor plate 141 and the widening anchor plate 142.

[0109] The connector 10 has the filling member 143, which makes it possible to prevent components originating from the connection structure or from the concrete poured around the second PC steel member 31 from entering the connector 10, for example, between the female member 16 and the male member 17. This makes it possible to prevent the female member 16 and the male member 17 from sticking together before tension is applied to the second PC steel member 31.

[0110] The filling member 143 is not limited to being disposed between the anchor plate 141 and the widening anchor plate 142, and may be disposed in any other location. For example, it may be disposed between the widening anchor plate 142 and the coupler sheath, between the widening anchor plate 142 and the female member 16, between the widening anchor plate 142 and the first fixing tool 15, etc. By disposing the filling member between the above-mentioned members, when a filling material is disposed around the connector 10, it is possible to prevent the filling material from leaking to the outside through the gaps between the above-mentioned members.

[0111] The type of the filling member 143 is not particularly limited, but may be one or more types selected from the group consisting of caulking material, rubber sheet, mortar, resin mortar, resin, adhesive, and double-sided tape.

[0112] The caulking material may be one or more selected from silicone, butyl rubber, and the like.

[0113] The rubber of the rubber sheet may be one or more types selected from chloroprene rubber, nitrile rubber, ethylene propylene diene rubber, and the like.

[0114] By using an adhesive or double-sided tape as the filling member 143, the widening anchor plate 142 can be firmly fixed to the anchor plate 141. (2-5) Joint As shown in Figure 3, the connector of this embodiment has a second connecting member 183 that fits into the first connecting member 162 of the female member 16, and may further have a joint connected to the female member 16 and the second fixing device 32 that grips the second PC steel material 31.

[0115] The connector of this embodiment is provided with a joint, so that the first PC steel member 12 and the second PC steel member 31 can be easily connected.

[0116] (2-5-1) First configuration example A first configuration example of the joint will be described with reference to Fig. 3. The joint of the first configuration example can be installed in the female member 16 shown in Fig. 1A.

[0117] The joint in this configuration example has a first joint 18 and a second joint 19. (2-5-1-1) First joint The first joint 18 can be provided with a second connecting member 183 on a side surface 18C of the first end 18A and a first male thread portion 184 on a side surface 18D of the second end 18B, which are ends along the longitudinal direction.

[0118] The first joint 18 is inserted into a second opening 161B located opposite to the first opening 161A, into which the first fastening tool is inserted, of the first fastening tool insertion hole 161 of the female member 16. The first connecting member 162 is disposed on an inner circumferential surface 16D of the second opening 161B of the first fastening tool insertion hole 161.

[0119] The first joint 18 is a member that connects the female member 16 and the second joint 19. Therefore, the first joint 18 can have a second connecting member 183 that fits into the first connecting member 162 of the female member 16, and a first male screw portion 184 that connects to the second joint 19.

[0120] The first joint 18 may have a different size for the portion inserted into the first fastening tool insertion hole 161 of the female member 16 and the portion inserted into the second joint 19. The first joint 18 may have, for example, a cylindrical outer shape, and may have a shape in which two cylindrical members with different outer diameters are connected, for the portion inserted into the first fastening tool insertion hole 161 of the female member 16 and the portion inserted into the second joint 19. The cylindrical shape does not have a strict geometrical meaning.

[0121] The second connecting member 183 of the first joint 18 can be configured to be able to mate with the first connecting member 162 of the female member 16. For example, the first connecting member 162 may be a female thread, and the second connecting member 183 may be a male thread.

[0122] In FIG. 3, when the first joint 18 is inserted into the first fastener insertion hole 161 of the female member 16, the first joint 18 and the male member 17 are not in contact with each other, but this is not limited to the embodiment.

[0123] The first joint 18 may be configured such that when the first joint 18 is inserted into the first fastener insertion hole 161 of the female member 16, the first end 18A of the first joint 18 comes into direct or indirect contact with the male member 17.

[0124] For example, first joint 18 may have a convex portion at first end 18A that protrudes further than other portions, and may be configured so that the convex portion presses male member 17 when first joint 18 is inserted into first fixing tool insertion hole 161. Also, a pressing member may be disposed between first end 18A of first joint 18 and male member 17, and first joint 18 may press male member 17 via the pressing member when first joint 18 is inserted into first fixing tool insertion hole 161. Both a convex portion and a pressing member may be provided.

[0125] By configuring first joint 18 to directly or indirectly press male member 17 when inserted into first fixing tool insertion hole 161, male member 17 can be pressed deeper and more evenly between first fixing tool 15 and female member 16. This allows female member 16 to be firmly fixed to first fixing tool 15 and female member 16, making the connection structure stronger.

[0126] The convex portion can be provided on a portion facing the male member 17, and the shape is not particularly limited. The convex portion may be provided on the first end portion 18A in a ring shape to match the male member 17, or in a dotted line shape.

[0127] The material of the pressing member is not particularly limited, and may include one or more selected from metals and elastic materials. When the material of the pressing member includes a metal, it is preferable that the metal is the same as that of the first joint 18 and the like that it contacts, in order to prevent corrosion between the pressing member and the contacting members.

[0128] When the pressing member includes an elastic material, rubber or the like can be preferably used as the elastic material. (Through hole) The first joint 18 can also have a through hole 182 along the central axis so that when it is installed in the female member 16, it does not interfere with the first PC steel member 12 housed in the female member 16. The inner diameter of the through hole 182 can be made equal to or larger than the outer diameter of the first PC steel member 12. (jig hole) The first joint 18 may also have a jig hole 185 for fixing a jig or the like for installing the first joint 18 . (2-5-1-2) Second joint The second joint 19 can have a first female thread portion 192 that fits with the first male thread portion 184 on an inner circumferential surface 191A of a recess 191 provided in the third end portion 19A and a fourth end portion 19B that are both ends along the length. The second joint 19 also has a second female thread portion 193 on an inner circumferential surface 191B of a recess 191 provided in the fourth end portion 19B that fits with a second male thread portion 323 provided on the outer periphery of a second fixing tool 32 that grips the second PC steel material 31.

[0129] The second joint 19 may have a through hole formed by connecting the recesses 191 provided at the third end 19A and the fourth end 19B. In this case, the second joint 19 has a cylindrical shape.

[0130] When recess 191 is a through hole, the inner surface of recess 191 may be provided with a female thread portion that continues from third opening 311A ​​to fourth opening 311B, and the female thread portion may be configured to include the above-mentioned first female thread portion 192 and second female thread portion 193.

[0131] Since the joint has the first joint 18 and the second joint 19, a connection structure that connects the first PC steel member and the second PC steel member can be easily installed.

[0132] The configuration of the second fixing tool 32 is not particularly limited, but may have the same configuration as that of the first fixing tool 15 , and may include a second female cone 321 and a second male cone 322 .

[0133] Since the second fixing device 32 is a fixing device that grips the second PC steel member 31, which is the newly installed PC steel member, it may also have a second male thread portion 323 on its outer periphery 32A.

[0134] The second fixing device 32 can also be shipped from the factory in a state where it is installed on the second PC steel member 31. For this reason, the second fixing device 32 can also have a pressing plate 33 to prevent the second male cone 322 from coming off. The pressing plate 33 has a plate portion 331 that contacts the second male cone 322, and a through-hole portion 332 through which the second PC steel member 31 passes. The pressing plate 33 can be fixed to the second fixing device 32 with bolts 34. (2-5-2) Second configuration example A second configuration example of the joint will be described with reference to Figures 5 and 6. The joint shown in the second configuration example can be installed in the female member 16 of the connector 40 shown in Figure 4.

[0135] The joint 51 may include a first recess 511 into which the female member 16 arranged at the first joint end 51A is inserted, out of a first joint end 51A and a second joint end 51B which are ends along the longitudinal direction. The joint 51 may include a second PC steel member gripping portion 52 provided at the second joint end 51B for gripping the end 31A of the second PC steel member 31.

[0136] The female member 16 may include a first connecting member 162 on an outer surface 16E along the longitudinal direction of the first fastener insertion hole 161. The first recess 511 may include a second connecting member 512 on an inner circumferential surface 511A.

[0137] The joint 51 can hold the second PC steel member 31 via the second fixing device 32 by the second PC steel member holding portion 52 arranged at the second joint end portion 51B.

[0138] Since the joint 51 is equipped with the second connecting member 512 that fits into the first connecting member 162 of the female member 16, and the second PC steel material holding portion 52, the connection structure connecting the first PC steel material 12 and the second PC steel material 31 can be easily installed. (First recess) The first recess 511 can accommodate the female component 16, the first PC steel member 12, the first fixing device 15, and a part of the male component 17, and the size and shape can be selected according to the components to be accommodated. (Second connecting member) The second connecting member 512 can be configured to be mateable with the first connecting member 162 of the female member 16. For example, the first connecting member 162 may be a male thread, and the second connecting member 512 may be a female thread. (2nd PC steel gripping part) The second PC steel member gripping portion 52 can be configured to grip the end portion 31A of the second PC steel member 31 via the second fixing device 32.

[0139] For example, the second PC steel member gripping portion 52 may have a second recess 521 disposed at the second joint end portion 51B and a third connecting member 522 provided on an inner surface 521A of the second recess 521.

[0140] The second recess 521 can accommodate, for example, at least a part of the second fastener 32, and is preferably provided on the surface of the second joint end 51B that is opposite to the surface on which the first recess 511 is provided. The second recess 521 can also be a through hole that is continuous with the first recess 511.

[0141] The third connecting member 522 and the fourth connecting member 53 can be configured to fit together and can include one or more selected from a groove and a ridge. The third connecting member 522 may be a male thread, and the fourth connecting member 53 may be a female thread.

[0142] The second PC steel member gripping portion 52 can grip the end portion 31A of the second PC steel member 31 via the second fixing device 32 by fitting the third connection member 522 into the fourth connection member 53 provided on the second fixing device 32. As a result, a connection structure 50 is formed in which the first PC steel member 12 and the second PC steel member 31 are connected within the joint 51.

[0143] Another configuration example of the second PC steel material gripping portion will be described with reference to FIG.

[0144] In the joint 61 , the second PC steel member gripping portion 62 may include a wall portion 622 having a through hole 621 .

[0145] The size and shape of the through hole 621 can be selected so that only the second PC steel member 31 passes through, and not the second fixing device 32. The diameter of the through hole 621 can be equal to or larger than the cord diameter of the second PC steel member 31. In addition, the diameter of the through hole 621 can be shorter than the length of the long side of the surface of the second fixing device 32 that faces the wall portion 622 when the second fixing device 32 is accommodated in the first recess 611. The wall portion 622 can form the surface located at the second joint end portion 61B of the first recess 611.

[0146] The joint 61 has a first recess 611, which is arranged at a first joint end 61A and into which the female member 16 is inserted. The joint 61 also has a second PC steel member gripping portion 62, which is arranged at a second joint end 61B opposite to the first joint end 61A and grips an end of the second PC steel member 31.

[0147] A second connecting member 612 is disposed on an inner surface 611A of the first recess 611, and the second connecting member 612 can have a shape that fits with the first connecting member 162.

[0148] The second fastener 32 can also be accommodated in the first recess 611. For this reason, it is preferable to select a size and shape of the first recess 611 so that the second fastener 32 can also be accommodated therein.

[0149] As the second PC steel member gripping portion 62 includes the wall portion 622, the second fixing tool 32 can be gripped by the wall portion 622, and the end portion 31A of the second PC steel member 31 can be gripped via the second fixing tool 32.

[0150] As a result, a connection structure 60 can be formed in which the first PC steel member 12 and the second PC steel member 31 are connected within the joint 61. (2-6) Coupler sheath The connector may further include a coupler sheath 35 which is a covering member. The coupler sheath 35 can be fixed by a fixing member 1423 of the widening anchor plate 142. (See FIG. 3.)

[0151] FIG. 3 shows an example in which the coupler sheath 35 is fixed to the fixing member 1423 by the bolt 36 , but the coupler sheath 35 can be fixed by a member corresponding to the fixing member 1423 .

[0152] To prevent the connection structure 30 from rusting and from being damaged by external forces, a filler is filled around the connection structure 30. The coupler sheath 35 functions as a mold for the filler, and the filler can be introduced, for example, from an injection port 351 provided at the bottom of the coupler sheath 35. Then, when the filler overflows from an outlet 352A or an outlet 352B, it can be confirmed that the filler has been filled inside the coupler sheath 35.

[0153] The number of inlets and outlets provided in the coupler sheath 35 is not particularly limited, and can be selected according to the size of the coupler sheath 35, etc.

[0154] It is preferable that the filler is filled so as to fill the inside of the coupler sheath 35. For this reason, it is preferable that the outlet 352A and the outlet 352B are disposed at a higher position in the coupler sheath 35 than the injection port 351, and it is more preferable that they are disposed on the upper surface of the coupler sheath 35.

[0155] The inlet 351, the outlet 352A, and the outlet 352B may be configured so as to be able to be closed after filling with the filler, and may have a bolt as a stopper or a screw for fixing a cap. The inlet 351, the outlet 352A, and the outlet 352B may be provided with a cock or a valve so as to be able to be closed after filling with the filler.

[0156] The inlet 351 may have a fitting such as a barb nipple or a connection screw so that a hose for supplying the filling material can be connected.

[0157] The coupler sheath 35 can be easily installed according to the design by fixing it to the fixing member 1423 of the widening anchor plate 142. In addition, when the coupler sheath is filled with a filler, the filler can be prevented from leaking to the outside. [Connection structure] Next, the connection structure of this embodiment will be described.

[0158] The connection structure of the present embodiment may include the connector according to one aspect of the present disclosure. Therefore, some of the matters that have already been described will not be described again.

[0159] The connection structure of this embodiment can be, for example, the connection structure 30 shown in FIG. 3, but may also be the connection structure 50 or the connection structure 60 shown in FIG. 5 or FIG.

[0160] The connection structure 30 of this embodiment is a structure in which a first PC steel member 12 and a second PC steel member 31 are connected.

[0161] The connection structure 30 has a first PC steel member 12, a second PC steel member 31, and a connector 10.

[0162] According to the connection structure of this embodiment, by arranging widening anchor plate 142, female member 16 can contact anchor plate 141 etc. over a wider area via widening anchor plate 142 compared to the case where widening anchor plate 142 is not arranged. As a result, the connection structure of this embodiment stabilizes the arrangement of female member 16 and male member 17, suppresses changes in the positions of female member 16 and male member 17, and can be easily installed. [Method of manufacturing the connection structure] A method for manufacturing the connection structure of this embodiment will be described.

[0163] The method for manufacturing a connection structure according to the present embodiment can manufacture a connection structure according to one aspect of the present disclosure, and therefore, the description of the matters that have already been described will be omitted.

[0164] The manufacturing method of the connection structure of this embodiment relates to a manufacturing method of a connection structure in which a first PC tendon and a second PC tendon are connected by a connector. The manufacturing method of the connection structure of this embodiment can be carried out according to the flow 70 shown in Fig. 7, and includes an anchor plate widening installation step (S1), a female member installation step (S2), and a male member installation step (S3).

[0165] (1) Widening anchor plate installation process (S1) In the widening anchor plate installation process, the widening anchor plate 142 can be installed by passing the first fixing device 15 of the first PC steel member 12 through the first through hole 1421.

[0166] In the widening anchor plate installation process, the widening anchor plate 142 can be installed so that the existing anchor plate 141 and the widening anchor plate 142 are in contact with each other. When a filling member 143 is arranged, the anchor plate 141 and the widening anchor plate 142 can be installed via the filling member 143. (2) Female component installation process (S2) In the female member installation step, the female member 16 can be installed so that the first fixing tool 15 is positioned within the first fixing tool insertion hole 161 that the female member 16 has.

[0167] 1A , the female member 16 can be installed by covering the first fastener 15 so that the first fastener 15 is positioned within the first fastener insertion hole 161 of the female member 16. From the viewpoint of stabilizing the connection structure 30, it is preferable to install the female member 16 so that the first female member end 16A of the female member 16 contacts the widening anchor plate 142.

[0168] (3) Male member installation process (S3) In the male member installation step, the male member 17 can be inserted and installed between the first fixing tool 15 and the female member 16 in the first fixing tool insertion hole 161.

[0169] When the male member installation process is completed, it is preferable that the widening anchor plate is sandwiched between the female member 16 and the existing anchor plate 141.

[0170] According to the manufacturing method of the connection structure of this embodiment, female member 16 can contact anchor plate 141 etc. over a wider area via widening anchor plate 142 compared to the case where widening anchor plate 142 is not arranged. As a result, the manufacturing method of the connection structure of this embodiment stabilizes the arrangement of female member 16 and male member 17, suppresses changes in their positions, and makes it easy to manufacture the connection structure.

[0171] The method for manufacturing the connection structure of this embodiment may further include an optional step, as shown in flow 80 of FIG. (4) Joint installation process (S4) In the joint installation process, a joint that connects the female member 16 and the second fixing tool 32 that grips the second PC steel material 31 can be installed.

[0172] The joint installation step can be carried out according to the shape of the joint.

[0173] In the case of the joint shown in FIG. 3, the joint installation process can be carried out, for example, in the following procedure.

[0174] First, the first joint 18 is installed in the first fastening tool insertion hole 161 of the female member 16. Next, the second fastening tool 32, to which the second joint 19 has been set beforehand, is brought close to the first joint 18, and the second joint 19 is rotated to displace the position of the second joint 19. At this time, the first male threaded portion 184 of the first joint 18 is fitted into the first female threaded portion 192 of the second joint 19, thereby connecting the second fastening tool 32 and the first joint 18.

[0175] Without being limited to the above form, the second joint 19 and the first joint 18 may be connected and integrated in advance, the joint integrated with the female member 16 may be installed, and then the second fixing device 32 may be installed on the second joint 19.

[0176] 5, the female member 16 is positioned in the first recess 511 of the joint 51, and the second connecting member 512 of the joint 51 is fitted into the first connecting member 162 of the female member 16, so that the joint 51 can be installed on the female member 16. Then, the fourth connecting member 53 of the second fixing device 32 is fitted into the third connecting member 522 of the joint 51, so that the second fixing device 32 and the joint 51 can be connected. Either the operation of fixing the second fixing device 32 to the second PC steel holding portion 52 or the operation of fixing the joint 51 to the female member 16 can be performed first.

[0177] In the case of the joint 61 shown in Fig. 6, first, the second PC steel member 31 is pulled out of the first recess 511 from the through hole 621 of the joint 51, while the second fixing device 32 is installed in the first recess 511. Next, the second connecting member 612 of the joint 61 and the first connecting member 162 of the female member 16 are fitted together so that the female member 16 is positioned in the first recess 511 of the joint 61, and the joint 51 can be installed on the female member 16.

[0178] By carrying out the joint installation process, a connection structure in which the first PC steel member 12 and the second PC steel member 31 are connected can be easily manufactured.

[0179] The joint installation step may also include a fastening step of forcing the male member 17 between the female member 16 and the first fastener 15 .

[0180] The fixing process can be carried out, for example, by installing a towing PC steel member and fixing device at the location where the second PC steel member 31 and second fixing device 32 of the joint are to be installed, and towing the towing PC steel member with a jack or the like. The conditions for towing the towing PC steel member are not limited, and can be selected according to the required amount of pushing in of the male member 17, etc. After the fixing process, the towing PC steel member, etc. can be removed, and the second PC steel member and second fixing device can be installed.

[0181] By carrying out the fixing step in the joint installation step, the connector can be firmly fixed to the first fixing tool 15. Therefore, it is possible to prevent the positions of the components of the connector 10 from shifting during the period from the joint installation step to the tensioning step. (5) Coupler sheath installation process (S5) In the coupler sheath installation step, the female member 16, the male member 17, the first fastener 15, the second fastener 32, and the coupler sheath 35 covering the joint can be installed on the widening anchor plate 142.

[0182] In the coupler sheath installation process, the coupler sheath 35 is fixed to the widening anchor plate 142 by the fixing members 1423 provided on the widening anchor plate 142 .

[0183] In the coupler sheath installation step, the connection structure can be protected by installing the coupler sheath 35.

[0184] Since the coupler sheath 35 is fixed to the widening anchor plate 142 by the fixing member 1423 provided on the widening anchor plate 142, the coupler sheath 35 can be attached with high precision to a position according to the design on the widening anchor plate 142. In addition, since the adhesion between the widening anchor plate 142 and the coupler sheath 35 is also improved, even if the coupler sheath 35 is filled with a filler, leakage of the filler from the gap between the widening anchor plate 142 and the coupler sheath 35 can be suppressed. (6) Filling process (S6) In the filling step, the inside of the coupler sheath 35 can be filled with a filling material.

[0185] In the filling step, the filler can be introduced, for example, from an injection port 351 provided in the coupler sheath 35 .

[0186] The filler material is not particularly limited, and various fillers can be used, for example, one or more types selected from epoxy resin, pregrout resin, wax, cement grout, asphalt, and the like.

[0187] During or after the filling process, it is preferable to check whether there is any leakage of the filler material from between the coupler sheath 35 and the widening anchor plate 142, and if any leakage is confirmed, to check the fixing state of the coupler sheath 35 by the fixing member 1423. It is also possible to refill the filler material.

[0188] After the filling process is completed, it is confirmed that there is no leakage of filling material from the coupler sheath 35, and concrete is poured around the connection structure and the second PC steel member 31, so that some or all of it can be placed within the concrete structure. (7) Tension process (S7) In the tensioning process, tension can be introduced to the second PC steel member 31. In the tensioning process, a jack or the like is connected to the second PC steel member 31, so that tension can be introduced.

[0189] (8) Filler material installation process In the filling member installation step, the filling member can be installed between the anchor plate 141 and the widening anchor plate 142, for example.

[0190] By providing the filling member 143, the arrangement of the widening anchor plate 142, the female member 16, and the male member 17 can be particularly stabilized, and changes in position can be particularly suppressed.

[0191] Providing the filling member 143 makes it possible to prevent the filler arranged around the connector 10, such as inside the coupler sheath 35, from leaking out from between the anchor plate 141 and the widening anchor plate 142. Providing the filling member 143 also makes it possible to prevent components originating from the connection structure or from concrete poured around the second PC steel member 31 from entering the connector 10, for example, between the female member 16 and the male member 17. This makes it possible to prevent the female member 16 and the male member 17 from sticking together before tension is applied to the second PC steel member 31 in the tensioning process.

[0192] In the filling member installation step, the filling member may be placed not only between the anchor plate 141 and the widening anchor plate 142, but also in any other location such as between the widening anchor plate 142 and the coupler sheath 35.

[0193] The filling member installation step can be performed, for example, before the widening anchor plate installation step, but can be performed at any timing depending on the placement location of the filling member. When using a filling member containing moisture, it is preferable to dry the moisture, etc., and confirm that the moisture has not leaked outside the placement location before performing the subsequent steps. [Explanation of symbols]

[0194] 10 Connectors 11 Concrete Structures 11A surface 12 1st PC steel material 12A end 13 Sheath 141 Anchor Plate 141A Surface 142 Widening anchor plate 142A 1st page 142B 2nd side 1421 First Through Hole 1421A Inner surface D1421 Inner diameter of first through hole 1422 Outer edge 1422A area 1423 Fixing parts 1424 Convex 143 Filling material 15 First fixing device D15 Outer diameter of first fixing tool 151 First Female Cone 151A outer circumference 152 First Male Corn 16 Female member D16 Outside diameter of female part 16A First female member end 16B Second female member end 16C Inner surface 16D Inner surface 16E External surface 161 First fastener insertion hole 161A 1st opening 1611 First area 1612 Second area D161A First opening inner diameter 161B 2nd opening 162 First connecting member 163 Jig hole 164 Outer edge 164A area 165 Recess 17 Male member 171 Male member split piece 172 Male member split piece A Block Arrow 18 1st joint (joint) 18A 1st end 18B 2nd end 18C side 18D Side 182 Through hole 183 Second connecting member 184 First male thread 185 Jig hole 19 Second Joint (Joint) 19A 3rd end 19B 4th end 191 Recess (through hole) 191A Inner surface 191B Inner surface 192 First female thread 193 Second female thread 30 Connection structure 31 2nd PC steel material 31A End 32 Second Fixture 321 2nd Female Cone 322 2nd Male Corn 32A outer circumference 323 Second male thread 33 Presser plate 331 Board part 332 Through hole 34 Volts 34A End face 35 Coupler sheath 351 Inlet 352A Outlet 352B Outlet 352 Second Pipe 36 Volts 40 Connectors 50 Connection structure 51 Joint 51A First joint end 51B Second joint end 511 First recess 511A Inner surface 512 Second connecting member 52 2nd PC steel gripping part 521 Second recess 521A Inner side 522 Third connecting member 53 Fourth connecting member CA center axis 60 Connection structure 61 Joint 61A First joint end 61B Second joint end 611 First recess 611A Inner surface 612 Second connecting member 62 2nd PC steel gripping part 621 Through hole 622 Wall 70 Flow 80 Flow S1 Widening anchor plate installation process S2 Female component installation process S3 Male member installation process S4 Joint installation process S5 Coupler sheath installation process S6 Filling process S7 Tension process

Claims

1. A connector used when connecting a first PC steel member and a second PC steel member, a female member having a first fastener insertion hole, which is a through hole into which a first fastener that grips the first PC steel member can be inserted; a male member configured to be insertable between the first fastener and an inner circumferential surface of the first fastener insertion hole; a plate-shaped widening anchor plate disposed between the female member and an anchor plate supporting the first fixing tool and having a first through hole into which the first fixing tool can be inserted; A connector, wherein the area of ​​a region surrounded by the outer edges of the surface of the widening anchor plate facing the female member is larger than the area of ​​a region surrounded by the outer edges of the surface of the female member facing the widening anchor plate.

2. 2. The connector of claim 1, wherein the widening anchor plate includes a fixing member for installing a covering member covering at least the female member, the male member, and the first fastener.

3. The coupling member further includes a coupler sheath, The connector according to claim 2 , wherein the coupler sheath is fixed to the widening anchor plate by the fixing member.

4. The connector according to claim 1 or 2, further comprising a filler member disposed between the anchor plate and the widening anchor plate.

5. The connector according to claim 1 or 2, wherein the widening anchor plate has a protrusion at a portion that contacts the anchor plate.

6. 3. The connector according to claim 1, wherein the female member comprises a first connecting member including at least one selected from a groove portion and a ridge portion.

7. The connector as described in claim 6, further comprising a joint having a second connecting member that mates with the first connecting member and is connected to the female member and a second fixing device that grips the second PC steel member.

8. The joint is a first joint including a first end and a second end along a longitudinal direction, the first end having the second connection member on a side surface thereof and the second end having a first male screw portion on a side surface thereof; a second joint, The first joint is inserted into a second opening of the first fastening tool insertion hole of the female member, the second opening being located opposite to a first opening into which the first fastening tool is inserted; the first connection member is disposed on an inner circumferential surface of the second opening of the first fastening tool insertion hole, The connector according to claim 7, wherein the second joint has a third end and a fourth end, which are both ends along the length, and the second joint has, on the inner surface of a recess provided in the third end, a first female threaded portion that engages with the first male threaded portion, and on the inner surface of a recess provided in the fourth end, a second female threaded portion that engages with a second male threaded portion provided on an outer periphery of a second fixing device that grips the second PC steel material.

9. The joint is a first joint end and a second joint end that are ends along a longitudinal direction, the first joint end being disposed at the first joint end, into which the female member is inserted; a second PC steel material gripping portion provided at the second joint end portion and configured to grip an end portion of the second PC steel material; the female member has the first connecting member on an outer surface along the first fastener insertion hole, The connector according to claim 7 , wherein the first recess is provided with the second connection member on an inner circumferential surface thereof.

10. A connection structure in which a first PC steel member and a second PC steel member are connected, The first PC steel material; The second PC steel material; a connector that connects the first PC steel member and the second PC steel member, The connector comprises: a female member having a first fastener insertion hole, which is a through hole into which a first fastener that grips the first PC steel member can be inserted; a male member configured to be insertable between the first fastener and an inner circumferential surface of the first fastener insertion hole; a plate-shaped widening anchor plate disposed between the female member and an anchor plate supporting the first fixing tool and having a first through hole through which the first fixing tool can be inserted; a joint connected to the female member and a second fixing tool that grips the second PC steel member, The area of ​​the region surrounded by the outer edge of the surface of the widening anchor plate facing the female member is larger than the area of ​​the region surrounded by the outer edge of the surface of the female member facing the widening anchor plate, The female member includes a first connecting member including at least one selected from a groove portion and a ridge portion, A connection structure, wherein the joint comprises a second connection member that mates with the first connection member.

11. A manufacturing method for a connection structure in which a first PC steel member and a second PC steel member are connected by a connector, The connector comprises: a female member having a first fastener insertion hole, which is a through hole into which a first fastener that grips the first PC steel member can be inserted; a male member configured to be insertable between the first fastener and an inner circumferential surface of the first fastener insertion hole; a plate-shaped widening anchor plate disposed between the female member and an anchor plate supporting the first fixing tool and having a first through hole into which the first fixing tool can be inserted; The method for manufacturing the connection structure includes: an installation step of installing the widening anchor plate through the first fixing device of the first PC steel member into the first through hole; a female member installation step of installing the female member such that the first fixing tool is positioned in the first fixing tool insertion hole of the female member; a male member installation step of inserting the male member between the first fixing tool and the female member in the first fixing tool insertion hole, A manufacturing method for a connection structure, wherein the area of ​​a region surrounded by the outer edge of the surface of the expansion anchor plate facing the female member is larger than the area of ​​a region surrounded by the outer edge of the surface of the female member facing the expansion anchor plate.

12. The method for manufacturing a connection structure according to claim 11 , further comprising a filler member installation step of arranging a filler member between the anchor plate and the width-expanding anchor plate.

13. a joint installation process of installing a joint that connects the female member and a second fixing tool that grips the second PC steel member; and a coupler sheath installation step of installing a coupler sheath covering the female member, the male member, the first fixing device, the second fixing device, and the joint on the widening anchor plate, The method for manufacturing a connection structure according to claim 11 or 12, wherein in the coupler sheath installation step, the coupler sheath is fixed to the width-expanding anchor plate by a fixing member provided on the width-expanding anchor plate.

14. The method for manufacturing a connection structure according to claim 13 , wherein the joint installation step includes a fixing step of pushing the male member between the female member and the first fastener.

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