JP4666687B2 - Concrete structure and coupler for construction of concrete structure - Google Patents

Description

  The present invention relates to a concrete structure constructed by connecting two or more precast concrete blocks, and a coupler used when constructing the concrete structure.

  Concrete structures such as beams, retaining walls, underdrains, and waterways are constructed by connecting two or more precast concrete blocks (hereinafter simply referred to as blocks) on site. When constructing this concrete structure, a coupler is generally used, and the coupler is roughly classified into a screw coupling type and a wedge coupling type.

  The screw coupling type coupler includes, for example, a male coupler attached to a reinforcing bar of one block and a female coupler attached to a reinforcing bar of the other block, and includes a male coupler, a male screw portion, and a female screw of a female coupler. The desired blocks are connected by press-contacting the end surfaces of the blocks together by screwing the portions together.

In addition, the wedge coupling type coupler includes, for example, a pair of couplers and a wedge member attached to each of the reinforcing bars of one block and the other reinforcing bar, and by inserting the wedge members into the mortises of both couplers. The desired block connection is performed by pressing the end surfaces of the blocks together.
Japanese Patent No. 3450270 Japanese Patent Laid-Open No. 7-76997

  The screw coupling type coupler can sufficiently secure the block coupling force by the screw tightening force at the time of screwing, but it takes a relatively long time for the screwing operation and also needs to manage the tightening torque at the time of screwing. . On the other hand, the wedge coupling type coupler can perform the desired block coupling by a simple operation, but it is difficult to ensure a sufficient block coupling force because the wedge member is only inserted into the mortise.

  The present invention was created in view of the above circumstances, and the object of the present invention is to construct a concrete structure capable of performing block connection with a simple operation and sufficiently securing the block connection force, and the concrete structure. It is an object of the present invention to provide a useful connector.

  In order to achieve the above object, a concrete structure of the present invention includes a first block in which a first reinforcing bar is embedded, a second block in which a second reinforcing bar is embedded, and a locking portion provided with a locking recess. And the reinforcing bar mounting part, the first coupler having the reinforcing bar mounting part attached to the first reinforcing bar, the shaft supporting part provided with the concave part for supporting the shaft, and the reinforcing bar mounting part. The second coupler attached to the second reinforcing bar, the shaft portion that can be rotatably supported in the shaft support recess of the second coupler, and the locking recess of the first coupler can be locked with a wedge action. A joint lever integrally formed with the engaging portion, and after the shaft portion of the joint lever is inserted into the shaft support recess of the second coupler, the joint lever is rotated around the shaft portion in a predetermined direction to engage. Push the part into the locking recess of the first coupler By locked, the first block and the second block by the wedge action caused by the pushing is connected in a state in which the end face of each other and pressed, and its characterized by.

  Further, the coupler of the present invention is a coupler for connecting the first block in which the first reinforcing bar is embedded and the second block in which the second reinforcing bar is embedded in a state where the end faces thereof are in pressure contact with each other, The coupler is provided with a first coupler that integrally has a locking part provided with a locking concave part and a reinforcing bar attaching part, and the reinforcing bar attaching part can be attached to the first reinforcing bar, and a concave part for shaft support. A second coupler that integrally has a shaft support portion and a reinforcing bar attachment portion and can be attached to the second rebar, and a shaft portion that can be rotatably supported in a shaft support recess of the second coupler and the first coupler A joint lever integrally including an engaging portion that can be locked with a wedge action in the locking recess, and after the shaft portion of the joint lever is inserted into the shaft support recess of the second coupler, Rotate the joint lever in a predetermined direction around the shaft to engage The first block and the second block can be connected in a state in which their end faces are in pressure contact with each other by the wedge action generated by the pushing by being pushed into the locking recess of the first coupler. And

  According to the concrete structure and the coupler of the present invention, after the shaft portion of the joint lever is inserted into the shaft support recess of the second coupler, the joint lever is rotated in a predetermined direction around the shaft portion to thereby engage the engagement portion. The first block and the second block can be connected in a state in which the end surfaces thereof are in pressure contact by the wedge action generated by the pushing, by pushing into the locking recess of the first coupler.

  In other words, since the desired block connection can be performed by simply rotating the joint lever in a predetermined direction, the work associated with the block connection can be easily performed, and the work cost can be reduced. In addition, since the wedge action is exerted by rotating the joint lever around the shaft in a specified direction, the wedge action is more effectively exhibited and the block connection force is sufficient than when the wedge member is inserted into the mortise. It is possible to secure a solid concrete structure.

  ADVANTAGE OF THE INVENTION According to this invention, block connection can be performed by a simple operation | work, and a concrete structure which can fully ensure block connection force, and a connector useful when constructing this concrete structure can be provided.

  The above object and other objects, structural features, and operational effects of the present invention will become apparent from the following description and the accompanying drawings.

[First Embodiment]
1 to 14 show a first embodiment of the present invention. 1 is a partial view of a concrete structure, FIG. 2 is a sectional view taken along line aa in FIG. 1, FIG. 3 is a top view of the first coupler shown in FIG. 1, and FIG. 4 is a sectional view taken along line bb in FIG. 5 is a top view of the second coupler shown in FIG. 1, FIG. 6 is a sectional view taken along the line cc of FIG. 5, FIG. 7 is a top view of the joint lever shown in FIG. 9 and 14 are explanatory diagrams of a method for constructing a concrete structure.

  In the figure, CB1 is the first precast concrete block (hereinafter simply referred to as the first block), CB2 is the second precast concrete block (hereinafter simply referred to as the second block), TRB1 is the first rebar, and TRB2 is the second rebar. Reference numeral 10 denotes a first coupler, 20 denotes a second coupler, 30 denotes a joint lever, and 40 denotes a screw.

  First, with reference to FIGS. 1-8, the shape of each component shown, a structure, etc. are demonstrated.

  The first block CB1 and the second block CB2 are for constructing concrete structures such as beams, retaining walls, culverts, waterways, etc., and both blocks CB1 and CB2 are connected with their end faces CB1a and CB2a butted together. Can be done. The first block CB1 is provided with a recess CB1b for exposing at least the upper surface of the engaging portion 11 of the first coupler 10, and the second block CB2 is provided for exposing at least the upper surface of the shaft support portion 21 of the second coupler 20. The concave portion CB2b is provided. Each recessed part CB1b, CB2b is opened on the end face side and one surface side of each block CB1, CB2. In the drawings, the concave portions CB1b and CB2b are shown having inclined walls. However, the concave portions CB1b, CB1b, and the like can be used as long as the joint lever 30 can be inserted and pushed in and the screws 40 can be inserted and screwed in. There is no particular limitation on the shape of CB2b.

  The first reinforcing bar TRB1 is embedded in the first block CB1, and the second reinforcing bar TRB2 is embedded in the second block CB2. Each of the reinforcing bars TRB1 and TRB2 is a so-called “screw reinforcing bar” having a male threaded portion at least at an end, and the threaded reinforcing bar has a male threaded portion at the end of a normal reinforcing bar, or a deformed shape having surface irregularities. A reinforcing bar having a male threaded portion at the end of the reinforcing bar, a deformed reinforcing bar having a spiral ridge corresponding to the male thread on the surface, or the like can be used as appropriate.

  The first coupler 10 integrally includes a locking part 11 having a rectangular parallelepiped shape and a reinforcing bar attaching part 12 having a truncated cone shape. The locking part 11 is provided with a recess 11a having an open upper surface, and the depth of the locking part 11 is equal to the depth of the recess 11a at the center of the end surface side (the right end surface side in FIGS. 3 and 4). A notch 11b having a predetermined width is provided. Further, on both sides of the notch 11b of the locking portion 11, a curved guide surface 11c and an inclined locking surface 11d are provided continuously up and down so as to project into the recess 11a. . The ratio of the height dimension of the guide surface 11c and the height dimension of the locking surface 11d is about 1: 1. In the first coupler 10 shown in FIGS. 3 and 4, the two surfaces including the guide surface 11c and the locking surface 11d constitute the notch-side wall of the recess 11a. Further, a frustoconical protruding portion 11e is provided on the bottom surface of the locking portion 11, and a screw hole 11f extending to the protruding portion 11e is provided on the bottom surface of the recess 11a. On the other hand, the reinforcing bar mounting portion 12 is provided with a female screw hole 12a into which the male screw portion of the first reinforcing bar TRB1 can be screwed.

  The first coupler 10 is embedded in the first block CB1 in a state where the female screw hole 12a of the reinforcing bar attaching portion 12 is screwed into the male screw portion of the first reinforcing bar TRB1 and attached to the first reinforcing bar TRB1. The upper surface of the locking part 11 is exposed through the recess CB1b. Further, the first coupler 10 embedded in the first block CB1 has the end surface of the locking portion 11 coincident with the end surface CB1a of the first block CB1. Needless to say, the end surface of the locking portion 11 may be slightly recessed inward from the end surface CB1a of the first block CB1.

  The second coupler 20 is integrally provided with a shaft support portion 21 having a rectangular parallelepiped shape and a rebar mounting portion 22 having a truncated cone shape, the width dimension of which coincides with the locking portion 11 of the first coupler 10. The shaft support portion 21 is provided with a recess 21a having an open top surface, and a first portion whose depth matches the depth of the recess 21a at the center of the end surface side (the left end surface side in FIGS. 5 and 6) of the shaft support portion 21. A notch 21b having the same width as the notch 11b of the coupler 10 is provided. Further, on both sides of the notch 21b of the shaft support portion 21, a curved shaft support surface 21c and a retaining surface 21d formed of an inclined surface are provided continuously in the vertical direction. The ratio of the height dimension of the shaft support surface 21c and the height dimension of the retaining surface 21d is about 2: 1. In the second coupler 20 shown in FIGS. 5 and 6, two surfaces including the shaft support surface 21c and the retaining surface 21d constitute a notch-side wall of the recess 21a. Furthermore, the wall (no reference numeral) of the concave portion 21a on the reinforcing bar mounting portion side is also inclined at the same inclination as the retaining surface 21d, and the concave portion 21a is inclined downwardly as a whole in the longitudinal section shown in FIG. Further, a shaft support groove 21e having a trapezoidal cross section is provided on each of the two walls in the width direction of the recess 21a with the same inclination as the retaining surface 21d. Each shaft support groove 21e is for receiving the projection 31b of the shaft portion 31 of the joint lever 30, and its width gradually decreases from the upper end to the lower side. Each shaft support groove 21e is closed at the lower end, and the lower end portion 21e1 is located at the center of curvature of the shaft support surface 21c. On the other hand, the reinforcing bar attaching portion 22 is provided with a female screw hole 22a into which the male screw portion of the second reinforcing bar TRB2 can be screwed.

  The second coupler 20 is embedded in the second block CB2 in a state in which the female screw hole 22a of the reinforcing bar attaching portion 22 is screwed into the male screw portion of the second reinforcing bar TRB2 and attached to the second reinforcing bar TRB2. The upper surface of the shaft support portion 21 and a part of the reinforcing bar attachment portion 22 are exposed through the recess CB2b. Further, in the second coupler 20 embedded in the second block CB2, the end surface of the shaft support portion 21 coincides with the end surface CB2a of the second block CB2. Of course, the end surface of the shaft support portion 21 may be slightly recessed inward from the end surface CB2a of the second block CB2.

  The joint lever 30 integrally includes a shaft portion 31 having a substantially cylindrical shape, an arm portion 32 having a substantially rectangular parallelepiped shape, and an engaging portion 33 having a substantially rectangular parallelepiped shape. The width dimension of the shaft portion 31 and the dimension in the direction orthogonal thereto are slightly smaller than the width dimension of the upper surface opening of the shaft support portion 21a of the second coupler 20 and the dimension orthogonal thereto. Further, a shaft surface 31a formed of a curved surface is provided on the left side of the shaft portion 31 in FIG. 8, and a truncated cone-shaped protrusion 31b is provided on each of both surfaces in the width direction. The curvature of the shaft surface 31a coincides with the shaft support surface 21c of the second coupler 20, and each protrusion 31b is located at the center of curvature of the shaft surface 31a. Each protrusion 31b has a protrusion dimension in which a part of each protrusion 31b can be simultaneously inserted into each shaft support groove 21e of the second coupler 20. On the other hand, the width dimension of the arm portion 32 is slightly smaller than the width dimension of the notch 11b of the first coupler 10 and the notch 21b of the second coupler 20. On the other hand, the right wall in FIG. 8 of the engaging portion 33 is an engaging surface 33a made of an inclined surface, and the inclination angle of the engaging surface 33a coincides with the locking surface 11d of the first coupler 10. . The engaging portion 33 is provided with a screw insertion hole 33b from the top surface to the bottom surface.

  Next, a method for constructing a concrete structure will be described with reference to FIGS. 1, 2, and 9 to 14.

  First, as shown in FIG. 9, the end face CB1a of the first block CB1 and the end face CB2a of the second block CB2 face each other, and as shown in FIG. 10, the end face of the locking portion 11 of the first coupler 10 Both blocks CB1 and CB2 are abutted so that the end face of the shaft support portion 21 of the second coupler 20 is aligned.

  Then, as shown in FIG. 11, the shaft portion 31 is inserted into the recess 21a of the second coupler 20 in a state where the joint lever 30 is tilted, and both the protrusions 31b are inserted into the shaft support grooves 21e of the second coupler 20, respectively. Insert into. The insertion of the joint lever 30 is restricted when each projection 31b reaches the lower end 21e1 of each shaft support groove 21e.

  Then, as shown in FIG. 12, the joint lever 30 after insertion is rotated in the counterclockwise direction in the drawing around the shaft portion 31. In this initial stage of rotation, since resistance that hinders the rotation operation does not occur, the joint lever 30 can be rotated by fingers, and the joint lever 30 supports each protrusion 31b positioned at the lower end portion 21e1 of each shaft support groove 21e. Will rotate as.

  By this rotation, the arm portion 32 of the joint lever 30 is inserted into the notches 11b and 21b of the couplers 10 and 20, and the engaging portion 33 of the joint lever 30 is inserted into the recess 11a of the first coupler 10. At this time, each guide surface 11c of the first coupler 10 serves to guide the engaging portion 33 of the joint lever 30 into the recess 11a by its curvature. Further, each retaining surface 21d of the second coupler 20 serves to prevent the shaft portion 31 of the joint lever 30 from coming off due to its inclination.

  Since the rotation resistance increases and the rotation of the joint lever 30 with fingers is difficult when the engagement surface 33a of the engagement portion 33 comes into contact with each locking surface 11d of the first coupler 10, it is shown in FIGS. As described above, the joint lever 30 is further rotated by applying pressure to the upper surface of the engaging portion 33 using a tool such as a hammer.

  By this further rotation, the engaging portion 33 of the joint lever 30 is pushed into the recess 11a of the first coupler 10, and the engaging surface 33a of the engaging portion 33 strongly bites into each locking surface 11d of the first coupler 10 and engages. The portion 33 is locked to the first coupler 10. Also, the first block CB1 and the second block CB2 are attracted by the wedge action caused by the pushing, the end faces CB1a, CB2a are pressed against each other, and both the blocks CB1, CB2 are connected. In this later stage of rotation, the joint lever 30 rotates with the center of curvature of both of them as a fulcrum in a state where the shaft surface 31a is pressed against each shaft support surface 21c, not each projection 31b.

  Thereafter, the screw 40 is inserted into the screw insertion hole 33b of the joint lever 30, and the engagement portion 33 is fixed by screwing the screw 40 into the screw hole 11f of the first coupler 10, as shown in FIGS. To do. Then, the recesses CB1b and CB1b of both blocks CB1 and CB2 are filled with a reinforcing material (not shown) such as mortar and cured.

  As described above, according to the above-described first embodiment, after the shaft portion 31 of the joint lever 30 is inserted into the shaft support portion 21 of the second coupler 20, the joint lever 30 is rotated in a predetermined direction around the shaft portion 31. Then, the engaging portion 33 is pushed into the locking portion 11 of the first coupler 10 to be locked, whereby the first block CB1 and the second block CB2 are brought into mutual end faces CB1a and CB2a by the wedge action generated by the pressing. Can be connected in a state where they are in pressure contact.

  That is, since the desired block connection can be performed by simply rotating the joint lever 30 in a predetermined direction, the work associated with the block connection can be easily performed, and the work cost can be reduced.

  Further, since the wedge action is exerted by the rotation of the joint lever 30 around the shaft portion 31 in the predetermined direction, the wedge action is effectively exhibited compared with the case where the wedge member is inserted into the mortise, and the block coupling force. Can be secured sufficiently, and a robust concrete structure can be constructed.

  Furthermore, since the screw 40 inserted into the screw insertion hole 33b of the joint lever 30 is screwed into the screw hole 11f of the first coupler 10 and the engaging portion 33 is fixed, each engaging surface 11d of the first coupler 10 is fixed to each locking surface 11d. Even in the case where the engaged portion 33 that is locked is loosened, this can be prevented in advance.

[Second Embodiment]
15 to 22 show a second embodiment of the present invention. 15 is a partial view of a concrete structure, FIG. 16 is a sectional view taken along the line dd in FIG. 15, FIG. 17 is a top view of the second coupler shown in FIG. 15, and FIG. 18 is a sectional view taken along the line ee in FIG. 19 is a top view of the joint lever shown in FIG. 15, FIG. 20 is a side view of FIG. 19, and FIGS. 21 and 22 are explanatory views of a method for constructing a concrete structure.

  In the figure, CB1 is the first precast concrete block (hereinafter simply referred to as the first block), CB2 is the second precast concrete block (hereinafter simply referred to as the second block), TRB1 is the first rebar, and TRB2 is the second rebar. Reference numeral 10 denotes a first coupler, 50 denotes a second coupler, 60 denotes a joint lever, and 40 denotes a screw.

  The second embodiment is different from the first embodiment in that a second coupler 50 having a different shape from that of the second coupler 20 is used and a joint lever having a different shape from that of the joint lever 30. 60 is used.

  First, with reference to FIGS. 15-20, the shape, structure, etc. of each illustrated component will be described.

  The first block CB1 and the second block CB2 are for constructing concrete structures such as beams, retaining walls, culverts, waterways, etc., and both blocks CB1 and CB2 are connected with their end faces CB1a and CB2a butted together. Can be done. The first block CB1 is provided with a recess CB1b for exposing at least the upper surface of the engaging portion 11 of the first coupler 10, and the second block CB2 is provided for exposing at least the upper surface of the shaft support portion 51 of the second coupler 50. The concave portion CB2b is provided. Each recessed part CB1b, CB2b is opened on the end face side and one surface side of each block CB1, CB2. In the drawings, the concave portions CB1b and CB2b are shown having inclined walls. However, the concave portions CB1b, CB1b, and the like can be used as long as the joint lever 60 can be inserted and pushed in and the screw 40 can be inserted and screwed in. There is no particular limitation on the shape of CB2b.

  The first reinforcing bar TRB1 is embedded in the first block CB1, and the second reinforcing bar TRB2 is embedded in the second block CB2. Each of the reinforcing bars TRB1 and TRB2 is a so-called “screw reinforcing bar” having a male threaded portion at least at an end, and the threaded reinforcing bar has a male threaded portion at the end of a normal reinforcing bar, or a deformed shape having surface irregularities. A reinforcing bar having a male threaded portion at the end of the reinforcing bar, a deformed reinforcing bar having a spiral ridge corresponding to the male thread on the surface, or the like can be used as appropriate.

  Since the 1st coupler 10 is the same as the 1st coupler 10 of 1st Embodiment, description here is abbreviate | omitted.

  The second coupler 50 integrally includes a shaft support 51 having a rectangular parallelepiped shape and a rebar mounting portion 52 having a truncated cone shape and a width dimension that is the same as that of the locking portion 11 of the first coupler 10. The shaft support 51 is provided with a recess 51a having an open upper surface, and a first portion whose depth coincides with the depth of the recess 51a at the center of the end surface side (left end surface side in FIGS. 17 and 18) of the shaft support 51. A notch 51b having the same width as the notch 11b of the coupler 10 is provided. Further, on both sides of the notch 51b of the shaft support portion 51, a shaft support surface 51c made of a curved surface and a retaining surface 51d made of an inclined surface are provided continuously in the vertical direction. The ratio of the height dimension of the shaft support surface 51c and the height dimension of the retaining surface 51d is about 3: 2. In the second coupler 50 shown in FIGS. 17 and 18, two surfaces including the shaft support surface 51c and the retaining surface 51d constitute a notch-side wall of the recess 51a. Furthermore, the wall (no reference numeral) of the concave portion 51a on the reinforcing bar mounting portion side is also inclined with the same inclination as the retaining surface 51d, and the concave portion 51a is inclined downward to the left as a whole in the longitudinal section shown in FIG. On the other hand, the reinforcing bar attaching portion 52 is provided with a female screw hole 52a into which the male screw portion of the second reinforcing bar TRB2 can be screwed.

  The second coupler 50 is embedded in the second block CB2 in a state in which the female screw hole 52a of the reinforcing bar attaching portion 52 is screwed into the male screw portion of the second reinforcing bar TRB2 and attached to the second reinforcing bar TRB2. The upper surface of the shaft support portion 51 and a part of the reinforcing bar attachment portion 52 are exposed through the recess CB2b. Further, in the second coupler 50 embedded in the second block CB2, the end surface of the shaft support 51 coincides with the end surface CB2a of the second block CB2. Of course, the end surface of the shaft support portion 51 may be slightly recessed inward from the end surface CB2a of the second block CB2.

  The joint lever 60 integrally includes a shaft portion 61 whose outer shape is cylindrical, an arm portion 62 whose outer shape is substantially rectangular parallelepiped, and an engagement portion 63 whose outer shape is substantially rectangular parallelepiped. The width dimension of the shaft portion 61 and the dimension in the direction orthogonal thereto are slightly smaller than the width dimension of the upper surface opening of the shaft support portion 51a of the second coupler 50 and the dimension orthogonal thereto. A shaft surface 61 a made of a circular curved surface is provided on the outer peripheral surface of the shaft portion 61, and the curvature of the shaft surface 61 a coincides with the shaft support surface 51 c of the second coupler 50. On the other hand, the width dimension of the arm part 62 is slightly smaller than the width dimension of the notch 11b of the first coupler 10 and the notch 51b of the second coupler 50. On the other hand, the right wall in FIG. 20 of the engaging portion 63 is an engaging surface 63a made of an inclined surface, and the inclination angle of the engaging surface 63a coincides with the locking surface 11d of the first coupler 10. . The engaging portion 63 is provided with a screw insertion hole 63b from the upper surface to the bottom surface.

  Next, a method for constructing a concrete structure will be described with reference to FIGS.

  First, as in the first embodiment, the end surface CB1a of the first block CB1 and the end surface CB2a of the second block CB2 face each other, and the end surface of the locking portion 11 of the first coupler 10 and the shaft of the second coupler 50 Both blocks CB1 and CB2 are abutted so that the end face of the support 51 is aligned.

  Then, as shown in FIG. 21, the shaft portion 61 is inserted into the concave portion 51 a of the second coupler 50 with the joint lever 60 tilted. The insertion of the joint lever 60 is restricted when the lower end of the shaft portion 61 reaches the lower end of the recess 51a (the shaft support surface 51c).

  Then, as shown in FIG. 22, the joint lever 60 after insertion is rotated about the shaft portion 61 in the counterclockwise direction in the figure. In this initial stage of rotation, since resistance that hinders the rotation operation does not occur, the joint lever 30 can be rotated by fingers, and the joint lever 60 has a curvature of both in a state where the shaft surface 61a is in contact with each shaft support surface 51c. It will rotate around the center.

  By this rotation, the arm portion 62 of the joint lever 60 is inserted into the notches 11b and 51b of the couplers 10 and 50, and the engaging portion 63 of the joint lever 60 is inserted into the recess 11a of the first coupler 10. At this time, each guide surface 11c of the first coupler 10 serves to guide the engaging portion 63 of the joint lever 60 into the recess 11a by its curvature. Further, each retaining surface 51d of the second coupler 60 serves to prevent the shaft portion 61 of the joint lever 60 from coming off due to its inclination.

  Since the rotation resistance increases and the rotation of the joint lever 60 by the fingers becomes difficult when the engaging surface 63a of the engaging portion 63 contacts each locking surface 11d of the first coupler 10, the same as in FIGS. 13 and 14 Thereafter, the joint lever 60 is further rotated by applying pressure to the upper surface of the engaging portion 63 using a tool such as a hammer.

  By this further rotation, the engaging portion 63 of the joint lever 60 is pushed into the concave portion 11a of the first coupler 10, and the engaging surface 63a of the engaging portion 63 bites into each locking surface 11d of the first coupler 10 and engages. The part 63 is locked to the first coupler 10. Also, the first block CB1 and the second block CB2 are attracted by the wedge action caused by the pushing, the end faces CB1a, CB2a are pressed against each other, and both the blocks CB1, CB2 are connected. In this later stage of rotation, the joint lever 60 rotates with the center of curvature of both of them as a fulcrum while the shaft surface 61a is pressed against each shaft support surface 51c.

  Thereafter, the screw 40 is inserted into the screw insertion hole 63b of the joint lever 60, and the engagement portion 63 is fixed by screwing the screw 40 into the screw hole 11f of the first coupler 10, as shown in FIGS. To do. Then, the recesses CB1b and CB1b of both blocks CB1 and CB2 are filled with a reinforcing material (not shown) such as mortar and cured.

  As described above, according to the second embodiment described above, after the shaft portion 61 of the joint lever 60 is inserted into the shaft support portion 51 of the second coupler 50, the joint lever 60 is rotated in a predetermined direction around the shaft portion 61. Then, the engaging portion 63 is pushed into the locking portion 11 of the first coupler 10 and locked, whereby the first block CB1 and the second block CB2 are brought into mutual end faces CB1a and CB2a by the wedge action generated by the pressing. Can be connected in a state where they are in pressure contact.

  That is, since the desired block connection can be performed by simply rotating the joint lever 60 in a predetermined direction, the work associated with the block connection can be easily performed, and the work cost can be reduced.

  Further, since the wedge action is exerted by the rotation of the joint lever 60 around the shaft portion 61 in a predetermined direction, the wedge coupling action is effectively exhibited compared with the case where the wedge member is inserted into the mortise, and the block coupling force. Can be secured sufficiently, and a robust concrete structure can be constructed.

  Further, since the screw 40 inserted into the screw insertion hole 63b of the joint lever 60 is screwed into the screw hole 11f of the first coupler 10 and the engaging portion 63 is fixed, the engaging portion 63 is fixed to each locking surface 11d of the first coupler 10. Even in the case where the engaged portion 63 that is locked is loosened, this can be prevented in advance.

  Furthermore, since the shaft support groove 21e and the protrusion 31b as in the first embodiment are unnecessary, the shapes of the second coupler 50 and the joint lever 60 can be simplified and the manufacturing costs can be reduced.

It is a fragmentary view of the concrete structure which shows 1st Embodiment of this invention. It is the sectional view on the aa line of FIG. It is a top view of the 1st coupler shown in FIG. It is the bb sectional view taken on the line of FIG. It is a top view of the 2nd coupler shown in FIG. FIG. 6 is a sectional view taken along the line cc of FIG. 5. It is a top view of the joint lever shown in FIG. FIG. 8 is a side view of FIG. 7. It is explanatory drawing of the construction method of a concrete structure. It is explanatory drawing of the construction method of a concrete structure. It is explanatory drawing of the construction method of a concrete structure. It is explanatory drawing of the construction method of a concrete structure. It is explanatory drawing of the construction method of a concrete structure. It is explanatory drawing of the construction method of a concrete structure. It is a fragmentary view of the concrete structure which shows 1st Embodiment of this invention. It is the dd sectional view taken on the line of FIG. FIG. 16 is a top view of the second coupler illustrated in FIG. 15. It is the ee sectional view taken on the line of FIG. FIG. 16 is a top view of the joint lever shown in FIG. 15. FIG. 20 is a side view of FIG. 19. It is explanatory drawing of the construction method of a concrete structure. It is explanatory drawing of the construction method of a concrete structure.

Explanation of symbols

  CB1 ... 1st block, CB2 ... 2nd block, TRB1 ... 1st reinforcing bar, TRB2 ... 2nd reinforcing bar, 10 ... 1st coupler, 11 ... Locking part, 11a ... Recessed part, 11b ... Notch, 11c ... Guide surface, 11d ... Locking surface, 11e ... Overhang, 11f ... Screw hole, 12 ... Reinforcing bar mounting portion, 12a ... Female screw hole, 20 ... Second coupler, 21 ... Shaft support, 21a ... Recess, 21b ... Notch, 21c ... shaft support surface, 21d ... retaining surface, 21e ... shaft support groove, 22 ... rebar mounting portion, 22a ... female screw hole, 30 ... joint lever, 31 ... shaft portion, 31a ... shaft surface, 32 ... arm portion, 33 ... Engaging portion, 33a ... engaging surface, 33b ... screw insertion hole, 40 ... screw, 50 ... second coupler, 51 ... shaft support, 51a ... recess, 51b ... notch, 51c ... shaft support surface, 51d ... retaining surface 52 ... Reinforcing bar attachment part, 52a ... Female screw hole, 60 ... Join Lever, 61 ... shank, 61a ... shaft surface, 62 ... arm portion, 63 ... engaging portion, 63a ... engagement surfaces, 63 b ... screw insertion hole.

Claims (2)

A first block in which a first reinforcing bar is embedded;
A second block in which the second rebar is embedded;
A first coupler that integrally has a locking portion provided with a locking recess and a reinforcing bar mounting portion, and that has the reinforcing bar mounting portion attached to the first reinforcing bar;
A second coupler in which a shaft support portion provided with a shaft support recess and a reinforcing bar attachment portion are integrally formed, and the reinforcing bar attachment portion is attached to the second rebar;
A joint lever integrally including a shaft portion that can be rotatably supported in the shaft support recess of the second coupler and an engagement portion that can be locked in the locking recess of the first coupler with a wedge action. Prepared,
After the shaft portion of the joint lever is inserted into the shaft support recess of the second coupler, the joint lever is rotated in a predetermined direction around the shaft portion to push the engagement portion into the lock recess of the first coupler. By locking, the first block and the second block are connected in a state in which their end faces are in pressure contact by the wedge action generated by the pushing,
A concrete structure characterized by that. A coupler for connecting the first block in which the first reinforcing bar is embedded and the second block in which the second reinforcing bar is embedded in a state in which the end faces are in pressure contact with each other,
The coupler is
A first coupler that integrally has a locking portion provided with a locking recess and a reinforcing bar mounting portion, and that can be attached to the first reinforcing bar;
A second coupler that integrally has a shaft support portion provided with a shaft support recess and a rebar attachment portion, and that can be attached to the second rebar;
A joint lever integrally including a shaft portion that can be rotatably supported in the shaft support recess of the second coupler and an engagement portion that can be locked in the locking recess of the first coupler with a wedge action. Prepared,
After the shaft portion of the joint lever is inserted into the shaft support recess of the second coupler, the joint lever is rotated in a predetermined direction around the shaft portion to push the engagement portion into the lock recess of the first coupler. By locking, the first block and the second block can be connected in a state in which the end faces thereof are in pressure contact by the wedge action generated by the pushing,
A connector for constructing a concrete structure characterized by the above.

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