JP2015078591A - Anchor device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an anchor device, capable of arranging both a core material and an anchor bolt in high position accuracy, capable of highly securing the position accuracy with excellent workability even at an installation stage, and capable of largely improving the workability.SOLUTION: The anchor device comprises: an anchor bolt arrangement plate 8 that is formed in a rectangular frame shape to which an upper end part 4a of an anchor bolt 4 is joined and secured, an outside stand 9 that is fixed to the ground side, has four support columns 17 arranged at four corners of the anchor bolt arrangement plate 8, and supports the anchor bolt 4 on the ground; an inside stand 10 that is arranged inside the outside stand 9 and fixed to the ground side, to which a lower end 5a of a core reinforcement 5 is placed to support the core reinforcement 5 on the ground; a connection part 11 that positions the inside stand 10 with respect to the outside stand 9 and connects them; and a holding member 12 that is detachably provided on the anchor bolt arrangement plate 8, and is removably engaged with the core reinforcement 5 for holding the core reinforcement 5 to the anchor bolt arrangement plate 8.

Description

  The present invention relates to an anchor device in which a plurality of anchor bolts for joining and fixing column bases of steel column members to foundation concrete and core rebars for fixing to steel column members are configured in an assembly.

  For example, Patent Document 1 and Patent Document include an anchor device that configures a plurality of anchor bolts for joining and fixing column bases of steel column members to foundation concrete and core rebars for fixing to steel column members in an assembly. 2 is disclosed.

  Patent document 1 “Steel tube structure anchor installation device for column base” is suitable for reinforcing the column base of a steel pipe structure by installing internal anchors such as reinforcing bars by utilizing the internal space of the steel pipe column. It is an object of the present invention to provide an anchor installation device, thereby simplifying the installation work of anchor bolts and internal anchors, and facilitating accurate installation of the anchors, and supporting a lower template by a base frame. An anchor bolt and an internal anchor inserted and installed in the steel pipe column are inserted through the insertion hole formed in the template and set up. The upper portions of the anchor bolts are inserted into insertion holes formed in the upper template, the upper portions of the anchor bolts are fastened and fixed by nuts, and the upper portions of the inner anchors are projected upward from the upper template. A structure in which the lower template is omitted, the anchor bolt is supported by the base frame, and the inner anchor is suspended from the upper template is shown.

  Patent document 2 “Construction method of non-embedded type column base and its non-embedded type column base structure” is fixed by fastening at least four corners of a square base plate for standing steel columns via anchor bolts fixed to the foundation concrete, respectively. These base plates and anchor bolts are constructed so as to be able to resist bending moments acting on the column bases via the steel columns, and the lines connecting the center of the diagonal anchor bolts of the base plate Shows a structure that reinforces the tensile strength against the axial force acting on the column base by providing an opening in the vicinity of the intersection where the two intersect, and arranging an appropriate number of reinforcing bars so as to penetrate the opening vertically ing.

JP 2003-105774 A JP 2004-176482 A

  Needless to say, multiple anchor bolts for firmly joining and fixing the base plate of steel column members such as steel pipe columns to foundation concrete need to be arranged with high positional accuracy. The core material such as the internal anchor and reinforcing bar to be fixed also needs to be arranged with high positional accuracy. Needless to say, high accuracy is also required for the mutual positional relationship between the anchor bolt and the core material.

  In the background art, in order to ensure high positional accuracy for these anchor bolts and inner anchors, a plurality of insertion holes are formed in the upper template and the lower template spaced apart from each other with high positional accuracy, and from the upper template to the lower template, An anchor bolt and an internal anchor are individually inserted into each insertion hole and held together, and the lower template is supported by the base frame, so that the anchor bolts, the internal anchors, and also the anchors are supported. The positional accuracy between the bolt and the inner anchor was ensured.

  The length of the anchor bolt is such that it reaches the base plate at the lower end of the column base, whereas the inner anchor is formed with a long protruding length so as to reach deep inside the steel column member. For this reason, the structure in which the anchor bolt and the inner anchor are assembled and integrated with the common upper and lower templates has a higher center of gravity than the structure in which only the anchor bolt is assembled.

  When the center of gravity is high, even if a slight force is applied, the whole is easy to tilt and unstable, so it is difficult to secure position accuracy with good workability at the installation stage. There has been a problem that it is difficult to arrange etc.

  In order to eliminate instability, the upper and lower templates and the base frame may be increased in size and weight. However, if this is done, there is a disadvantage that a large installation space is required, the weight is increased, the workability is deteriorated, and the cost is increased.

  When the number of internal anchors and reinforcing bars is large, it is conceivable to improve the construction efficiency by pre-fabricating with a jig or the like. However, in the background art, since the insertion holes through which the internal anchors and the like are individually inserted are formed in the template, the internal anchors and the like cannot be set in a grounded state.

  Lower parts such as anchor bolts and inner anchors are buried in the foundation concrete. After curing the concrete foundation, it is necessary to remove the upper template. Since an internal anchor with a long projecting length is inserted through the insertion hole of the upper template, in order to remove the upper template, it must be pulled out from the internal anchor through the insertion hole, and the upper template is removed. The work was very complicated.

  In this way, since the upper template is extracted upwardly, when the fixing member is to be provided on the upper end side of the inner anchor or the like for the purpose of securing the fixing property to the steel column member such as the inner anchor, the upper template is used. There is also a problem that the fixing member cannot be provided unless it is removed and the workability is not good.

  The present invention was devised in view of the above-described conventional problems, and it is possible to dispose both the core material and the anchor bolt with high positional accuracy, and it can be positioned with good workability even in the installation stage. It is possible to ensure high accuracy, it is possible to set the ground core material properly, the removal work of the parts that need to be removed is also simple, and any core material is optional It is an object of the present invention to provide an anchor device that can attach a member at the timing and can greatly improve workability.

  An anchor device according to the present invention is formed in a rectangular frame shape, and anchor bolt arrangement plates to which upper ends of a plurality of anchor bolts arranged at intervals are joined and fixed, and fixed to the ground side. An outer frame in the form of a frame for supporting a plurality of the anchor bolts on the ground, and four grounds arranged on the four corners of the array plate; The lower ends of a plurality of core members that are fixed to the anchor bolt arrangement plate and are inserted through the anchor bolt array plate from the upper side to the lower side are placed, and an inner frame that supports these core materials on the ground, and the inner frame with respect to the outer frame In order to hold the core material on the anchor bolt arrangement plate, which is provided detachably on the anchor bolt arrangement plate and the connecting parts for positioning the pedestal and connecting both Characterized in that a holding member which is disengaged in the core material.

  The holding member is divided into a plurality of holding pieces that can be engaged and disengaged from the side of the core member inserted through the anchor bolt array plate from the upper side to the lower side.

  An upper spacer and a lower spacer are provided at the upper and lower ends of the plurality of core members, respectively, and the lower spacer is joined to the inner frame.

  The inner frame is formed in a frame form in which four pillar members are arranged at four corners, and a receiving seat for placing the lower spacer is provided between the pillar members at an intermediate position in the height direction. It is characterized by.

  In the anchor device according to the present invention, both the core material and the anchor bolt can be arranged with high positional accuracy, and high positional accuracy can be secured with good workability even in the installation stage. In addition, the ground core material can be appropriately set, the removal work of the member that needs to be removed can be easily performed, and the member can be attached to the core material at an arbitrary timing. Workability can be greatly improved.

It is a perspective view which shows 1st Embodiment of the anchor apparatus which concerns on this invention. It is a side view of the anchor apparatus shown in FIG. It is explanatory drawing of the inner frame applied to the anchor apparatus shown in FIG. It is a component diagram in the case of assembling the core material integrated in an anchor apparatus. It is explanatory drawing of the ground work of the core material integrated in an anchor apparatus. It is a perspective view of the holding member applied to the anchor apparatus shown in FIG. It is a plane sectional view showing an example of the column base part of the steel column member constructed using the anchor device concerning the present invention. In FIG. 7, it is an AA arrow directional cross-sectional view. It is plane sectional drawing which shows the other example of the column base part of the steel column member constructed | assembled using the anchor apparatus which concerns on this invention. It is a perspective view of the inner frame and core rebar which show the modification of 1st Embodiment. It is a perspective view which shows 2nd Embodiment of the anchor apparatus which concerns on this invention. It is a side view of the anchor apparatus shown in FIG. It is explanatory drawing of the inner frame applied to the anchor apparatus shown in FIG. It is a perspective view of an inner frame and a core rebar showing a modification of the second embodiment. It is a perspective view of an inner frame and a core rebar showing another modification of the second embodiment. It is explanatory drawing explaining the modification of the holding member applied to the anchor apparatus which concerns on this invention. It is explanatory drawing explaining the holding piece which comprises the holding member shown in FIG. It is explanatory drawing explaining the other modification of the holding member applied to the anchor apparatus which concerns on this invention. It is explanatory drawing explaining the holding piece which comprises the holding member shown in FIG. It is a perspective view which shows the modification of the support | pillar of the inner frame applied to the anchor apparatus which concerns on this invention. It is a perspective view which shows the modification of the installation form of the anchor apparatus which concerns on this invention.

  DESCRIPTION OF EMBODIMENTS Hereinafter, preferred embodiments of an anchor device according to the present invention will be described in detail with reference to the accompanying drawings. 1 is a perspective view showing an anchor device according to a first embodiment of the present invention, FIG. 2 is a side view of the anchor device shown in FIG. 1, and FIG. 3 is applied to the anchor device shown in FIG. FIG. 4 is an explanatory diagram of the inner frame, FIG. 4 is a component diagram when the core material is assembled, FIG. 5 is an explanatory diagram of the core material assembly work, and FIG. 6 is applied to the anchor device shown in FIG. The perspective view of a holding member, Drawing 7 is a plane sectional view showing an example of the column base part of the steel pillar member constructed using the anchor device concerning the present invention, and Drawing 8 is an AA line in Drawing 7. FIG. 9 is a cross-sectional view taken along the arrow, and FIG. 9 is a plan sectional view showing another example of the column base portion of the steel column member constructed using the anchor device according to the present invention.

  As shown in FIGS. 1 and 2, the anchor device 1 according to the first embodiment is embedded in a reinforced concrete foundation 2 constructed of concrete placed on the ground G, and the steel column member 3 is attached to the foundation. 2 is used for fixing on the surface. The steel column member 3 is constructed by, for example, a conventionally known CFT structure or SRC structure.

  In the anchor device 1, a plurality of anchor bolts 4 and a plurality of core rebars 5 are assembled as members for joining the steel column member 3 to the foundation 2. In this embodiment, the anchor bolt 4 is a round steel having a threaded portion at the end, and the core rebar 5 is a screw rebar (deformed rebar), but may be other than that.

  As shown in FIGS. 7 and 8, the anchor bolt 4 is joined to a base plate 6 provided at the lower end of the column base portion of the steel column member 3. The core rebar 5 is fixed deep inside the concrete C constituting the steel column member 3.

  As shown in FIGS. 1, 2, 7, and 8, the plurality of anchor bolts 4 are arranged in a rectangular ring shape surrounding the outer periphery of the steel column member 3 and spaced from each other. The plurality of anchor bolts 4 are fastened to the base plate 6 by screwing nuts 7 into their upper ends protruding upward from the anchor bolt insertion holes of the base plate 6, whereby the base plate 6, and eventually the steel columns, are fastened. The member 3 is bonded and fixed on the foundation 2.

  The plurality of core rebars 5 are collectively arranged inward from the anchor bolts 4 arranged in a rectangular ring shape. These core rebars 5 are inserted into insertion holes 6a (see FIG. 8) at the center of the base plate 6 and are arranged from the foundation 2 side toward the steel column member 3 inside. The core rebar 5 is disposed at a substantially central position of the flat cross section of the steel column member 3. The core reinforcing bar 5 is fixed to the concrete on the foundation 2 side, and the upper end side is fixed to the concrete C forming the steel column member 3.

  Hereinafter, the anchor device 1 in the previous stage of constructing the foundation 2 on which the steel column member 3 is erected will be described. The anchor device 1 mainly includes an anchor bolt arrangement plate 8 to which a plurality of anchor bolts 4 are joined and fixed together, and an outer frame 9 that supports the weight of all the anchor bolts 4 via the anchor bolt arrangement plate 8. In addition to the outer frame 9, the inner frame 10 that collectively supports the weights of the plurality of core rebars 5, the inner frame 10 is positioned with respect to the outer frame 9, and the connecting part 11 that connects the two and the anchor A holding member 12 for holding the core rebar 5 on the anchor bolt arrangement plate 8 at the height position of the bolt arrangement plate 8 is provided.

  The anchor bolt array plate 8 is disposed on the upper end portion 4 a of the anchor bolt 4. The anchor bolt arrangement plate 8 is formed in a rectangular frame shape along the arrangement of the anchor bolts 4 and has a rectangular opening 13 at the center surrounded by four frame side portions 8a forming a rectangular shape. A through hole is formed in the anchor bolt arrangement plate 8 in accordance with the anchor bolt insertion hole position of the base plate 6.

  Prior to being fastened to the base plate 6, the upper end portions 4 a of the plurality of anchor bolts 4 are joined and fixed to the anchor bolt arrangement plate 8 by nuts 14 screwed from the front and back. In order to stiffen the anchor bolt array plate 8, four ribs 15 are formed on the rim of each side of the rectangular opening 13 by bending downward.

  The outer gantry 9 is installed on the ground G and fixed on the ground G side. The outer frame 9 includes four frame members 16 a constituting the base frame 16 and four support pillars 17 arranged at the four corners of the rectangular frame-shaped anchor bolt array plate 8. The frame member 16a and the support column 17 are all made of an L-shaped angle material. The outer frame 9 is formed in a skeleton form by assembling L-shaped angle members.

  Hereinafter, for the L-shaped angle material, the side narrowed by the corner portion p by bending is referred to as an entrance corner side q, and the side opposite to the entrance corner side q is referred to as an exit corner side r (see FIGS. 3 and 13). The four support pillars 17 are erected so that the entrance corner side q faces the inside of the rectangular frame shape of the anchor bolt arrangement plate 8, that is, the opening 13 side.

  In this embodiment, the lower end of the support column 17 is joined to a substantially rectangular base frame 16, and all the support columns 17 are erected on the ground G by the base frame 16. The base frame 16 is configured by combining four frame members 16a. The frame member 16a is disposed on its side so that the corner angle q faces the outside of the base frame 16.

  The base frame 16 abuts and joins one end of the first frame member 16a to a midway portion in the length direction of the adjacent second frame member 16a, and also connects one end of the second frame member 16a to the adjacent second frame member 16a. The three frame members 16a are similarly butted and joined, and such joining is repeated so as to go around the third and fourth frame members 16a and the fourth and first frame members 16a. Formed. The base frame 16 has a protruding leg portion 18 so that a part of each frame member 16a changes its angle by 90 degrees from the four corners of the base frame 16 and projects around the base frame 16 in different directions in the front, rear, left and right directions. Is formed.

  Moreover, the joining location by butting | matching of the frame materials 16a is formed at a substantially right angle. The support column 17 made of an L-shaped angle member is aligned with the right-angled joint portion r and joined to the base frame 16, thereby forming the outer frame 9.

  In the present embodiment, with respect to the outer frame 9, the lower ends of the support pillars 17 are joined to the four corners of the rectangular base frame 16. However, the frame members 16 a adjacent to each other at the four corners are arranged at substantially right angles. Then, among the four frame members 16a, a set of facing frame members 16a is placed on the ground G so as to be joined to the lower end of the support pillar 17, and another set of facing members is set. The frame member 16a is floated upward from the ground G so as to be joined to the intermediate portion in the height direction of the support column 17, and is arranged horizontally. The frame member 16a on the ground G and the frame member 16a floated from the ground G are arranged. It goes without saying that the outer frame 9 in the form of a frame may be configured by connecting with the support columns 17.

  In the present embodiment, the four support pillars 17 are positioned below the anchor bolt arrangement plate 8 in order to secure the engagement between the lower end portion 4b of the anchor bolt 4 and the outer frame 9, and these A lower anchor bolt arrangement plate 19 is provided so as to surround the support pillar 17.

  The lower anchor bolt array plate 19 has a rectangular frame shape, like the upper anchor bolt array plate 8, and has a square-shaped opening 20 at the center, and is aligned with the anchor bolt insertion hole position of the base plate 6. The lower end portion 4b of the anchor bolt 4 inserted through the formed through hole is joined and fixed by a nut 21 screwed from the front and back. Plate-shaped upward ribs 22 are joined to a pair of mouth edge positions facing the opening 20 in parallel with each other.

  The installation height position of the lower anchor bolt arrangement plate 19 is a height position at which the upper end of the anchor bolt 4 can be joined and fixed to the base plate 6 when the lower end portion 4b of the anchor bolt 4 is joined and fixed thereto. Is set. Accordingly, the installation height position of the anchor bolt arrangement plate 8 is set to a position that is substantially the same as or slightly lower than the installation height position of the base plate 6.

  Moreover, the height of the support column 17 is set to a height sufficiently lower than the installation height position of the anchor bolt arrangement plate 8 so as not to interfere with the reinforcing bars arranged on the foundation 2 and the base plate 6. Each of the four support pillars 17 is inserted into the opening 20 from below to above, and the protruding corner side r thereof is joined to each of the four corners of the opening 20 of the lower anchor bolt arrangement plate 19. The As a result, the lower anchor bolt arrangement plate 19 is fixedly attached to the support column 17 of the outer frame 9.

  The total weight of the plurality of anchor bolts 4 joined and fixed to both the anchor bolt array plate 8 and the lower anchor bolt array plate 19 is supported on the ground G by the outer frame 9 having four support columns 17.

  The lower anchor bolt arrangement plate 19 having the above-described configuration is not necessarily provided. Instead of the lower anchor bolt arrangement plate 19, each support column 17 is joined with an angle material for attaching an anchor bolt, and the lower end portion 4 b of the anchor bolt 4 is joined and fixed to this angle material. 17 may be supported.

  An inner frame 10 is disposed inside the outer frame 9. As shown in FIG. 3, the inner frame 10 is composed of a single column 23 and a plate-shaped receiving seat 24 whose center is joined to the upper end of the column 23. The support 23 is also made of an L-shaped angle material. When the support column 23 is erected on the ground G, the inner frame 10 is fixed on the ground G side.

  On the receiving seat 24, lower ends 5 a of a plurality of core rebars 5 that are inserted from the upper side to the lower side into the openings 13 and 20 of the anchor bolt arrangement plate 8 and the lower anchor bolt arrangement plate 19 abut together. And placed. Thereby, the core rebar 5 is supported on the ground G. The height of the column 23 is set according to the fixing length of the core rebar 5 with respect to the steel column member 3.

  The connecting part 11 connects the outer gantry 9 and the inner gantry 10 arranged on the inside thereof. Further, when the connecting parts 11 are connected, the inner base 10 is positioned with respect to the outer base 9. By positioning these mounts 9 and 10, the anchor bolt 4 and the core rebar 5 are positioned relative to each other.

  The connecting part 11 is composed of two positioning members 11a and 11b. The positioning materials 11a and 11b are also made of an L-shaped angle material. The connecting part 11 has one end in the length direction of the shorter positioning material 11b joined to the protruding corner side r at the center in the length direction of the longer positioning material 11a in a state where the positioning materials 11a and 11b are laid sideways. By doing so, it is formed in the shape of a T shape in which a corner portion substantially perpendicular to the joint location is obtained.

  The longer positioning member 11 a is formed with a length dimension that is passed between a pair of facing frame members 16 a that constitute the base frame 16 of the outer frame 9. Both ends in the length direction of the longer positioning member 11a are joined to the center between joining portions of the frame members 16a by the butting.

  The shorter positioning member 11b is formed with a length dimension that is passed between the longer positioning member 11a arranged in parallel and one of the frame members 16a facing the positioning member 11a. The other end in the length direction of the shorter positioning member 11b is joined to the center between joining portions of the frame members 16a by the butting. Briefly, the connecting part 11 is configured so that the right corners of the positioning members 11a and 11b assembled in a T-shape are positioned at the center of the space inside the rectangular base frame 16. To be joined.

  And the support | pillar 23 comprised by the L type | mold angle material of the inner frame 10 is aligned with the right-angled corner part of the positioning material 11a, 11b, and the joining corner 11 is joined to the protruding corner side r of the lower end, The outer frame 9 and the inner frame 10 are positioned with respect to each other via the connection part 11 and are connected to each other.

  The outer frame 9 and the connecting part 11 and the connecting part 11 and the inner frame 10 may be joined in advance and carried to the site or may be joined at the site. The joining may be welding joining or joining by bolts and nuts.

  The core rebar 5 will be described. The core rebar 5 is individually handled as shown in FIG. 8 and is inserted one by one from the openings 13 and 20 of the anchor bolt arrangement plate 8 and the lower anchor bolt arrangement plate 19. Then, it may be placed on the receiving seat 24 of the inner frame 10. In FIG. 8, fixing pieces 25 for securing fixing to the concrete on the foundation 2 side and the concrete C on the steel column member 3 side are provided on the upper end 5 b and the lower end 5 a of the core rebar 5. When the fixing piece 25 is provided, the lower end 5 a of the core rebar 5 is placed on the inner frame 10 via the fixing piece 25.

  On the other hand, as shown in FIG. 4A, the core rebar 5 may be handled by assembling a plurality of core rebars. On the lower end 5 a side and the upper end 5 b side of the core rebar 5, there are provided a lower spacer 26 and an upper spacer 27 that maintain the distance between the lower ends 5 a and the upper ends 5 b of the core rebar 5 and position them.

  The lower spacer 26 includes a lower plate 26a that can be installed on the receiving seat 24, and a sleeve 26b in which the lower end 5a of the core rebar 5 is inserted and the lower end 5a of the core rebar 5 is held by tightening screws or the like. . On the other hand, the upper spacer 27 includes an upper plate 27b having a through hole 27a through which the upper end 5b of the core rebar 5 is inserted, and a nut 27c screwed into the upper end 5b of the core rebar 5 from the front and back of the upper spacer 27b. The

  When joining the core rebar 5 to the upper spacer 27 and the lower spacer 26, the lower end 5a of any one of the core rebars 5 is inserted into the sleeve 26b of the lower spacer 26 and held as shown in FIG. In addition, the upper end 5b of the core rebar 5 is joined to the upper spacer 27 with the nut 27c, and the lower spacer 26 and the upper spacer 27 are assembled to the core rebar 5; First, it is inserted into the through hole 27a of the upper spacer 27, then the core rebar 5 is pulled back to the lower spacer 26 side, the lower end 5a is inserted into the sleeve 26b, and finally the upper end 5b is inserted into the upper plate 27b of the upper spacer 27 with a nut 27c. What is necessary is just to join and fix to.

  Thereby, the multiple core rebar 5 can be assembled | attached integrally to the up-and-down spacers 26 and 27 in the positioned state. The upper and lower spacers 26, 27, particularly the upper spacer 27, can function as a fixing member for fixing the core rebar 5 to the concrete C on the steel column member 3 side.

  Even when a plurality of core reinforcing bars 5 are integrated as described above, the core reinforcing bars 5 are inserted into the openings 13 and 20 of the anchor bolt arrangement plate 8 and the lower anchor bolt arrangement plate 19 and placed on the inner frame 10. It can be supported on the ground G side. When the lower spacer 26 is used, the lower spacer 26 is joined and fixed using the receiving seat 24 of the inner frame 10 and bolts and nuts or by welding.

  As shown in FIG. 1, the holding member 12 is detachably provided on the anchor bolt array plate 8 with a bolt or the like. The holding member 12 is engaged with the core rebar 5 by being attached to the anchor bolt arrangement plate 8 in order to hold the upper end 5 b side of the core rebar 5 with the anchor bolt arrangement plate 8. When the anchor bolt array plate 8 is removed from the portion 4a, the anchor bolt array plate 8 is previously removed from the anchor bolt array plate 8 and thereby detached from the core rebar 5.

  In this embodiment, the holding member 12 is divided into two strip-shaped holding pieces 28 as shown in FIG. Each holding piece 28 is formed with a length that spans the opening 13 and spans the opposite frame side 8 a of the anchor bolt array plate 8. The holding piece 28 is formed with a recess 28a for engaging with the core rebar 5 from the lateral direction. The holding pieces 28 are arranged in parallel with the opening 13 and are used in pairs so that the concave portions 28a facing each other surround the plurality of core rebars 5 from their lateral directions.

  Accordingly, these holding pieces 28 are engaged with the core reinforcing bars 5 inserted through the openings 13 of the anchor bolt arrangement plate 8 from the upper side to the lower side so as to be disengageable from the side thereof. The two holding pieces 28 that surround the core rebar 5 with the recesses 28a are bonded and fixed to the upper surface of the frame side portion 8a of the anchor bolt arrangement plate 8 at both ends 28b in the length direction. It is positioned and held on the anchor bolt array plate 8 via the holding member 12.

  The holding member 12 (holding piece 28) is not limited to the illustrated example as long as it can be engaged and disengaged with respect to the core rebar 5 and may have any shape. Further, the holding member 12 is preferably divided into two, but it is needless to say that the holding member 12 may be divided into a larger number.

  The operation of the anchor device 1 according to the first embodiment will be described. The anchor device 1 is used for assembling the anchor bolt 4 and the core rebar 5 embedded in the concrete of the foundation 2 with high accuracy in advance. First, the outer frame 9 having the support pillars 17 and the inner frame 10 having the support columns 23 are connected by the connecting part 11, and the outer frame 9 and the inner frame 10 are positioned by the connecting part 11. At this time, it is preferable to join the support column 17 to the base frame 16 after joining the inner frame 10 to the base frame 16 by the connecting part 1. Further, it is preferable that the lower anchor bolt array plate 19 is finally attached and fixed to the outer frame 9.

  The outer gantry 9 and the inner gantry 10 which are integrated via the connecting parts 11 are fixed and installed at predetermined positions on the ground G. A plurality of anchor bolts 4 are disposed between the lower anchor bolt array plate 19 and the anchor bolt array plate 8 of the outer gantry 9, and are joined and fixed to these array plates 8 and 19.

  For example, the lower end portions 4b of all the anchor bolts 4 are first joined and fixed to the lower anchor bolt arrangement plate 19, and then the upper end portions 4a of the arranged anchor bolts 4 are attached from above the anchor bolt arrangement plate. Join and fix to 8.

  Alternatively, the upper ends 4 a of the plurality of anchor bolts 4 are joined and fixed to the anchor bolt arrangement plate 8, and the lower ends 4 b of the anchor bolts 4 in the suspended state are joined and fixed to the lower anchor bolt arrangement plate 19. In any of the assembling methods, the weights of all of the plurality of anchor bolts 4 are supported on the ground G side via the support pillars 17 and the base frame 16 of the outer frame 9.

  The core reinforcing bars 5 are prepared one by one or assembled together by the upper and lower spacers 26 and 27. In a state where the core reinforcing bars 5 are assembled one by one or assembled, the core reinforcing bars 5 are inserted through the openings 13 and 20 of the anchor bolt arrangement plate 8 and the lower anchor bolt arrangement plate 19 from the upper side to the lower side. 24.

  Thereby, the weight of all the core rebars 5 is supported by the ground G side via the receiving seat 24 and the support | pillar 23 of the inner frame 10. FIG. At this time, the opening 13 of the anchor bolt arrangement plate 8 or the like does not restrict or prevent the insertion of the core rebar 5, so even the core rebar 5 fitted with the lower spacer 26 having a fixing function has no problem. Can be inserted.

  In this work stage, the anchor bolt 4 and the core rebar 5 are separately supported by the outer frame 9 and the inner frame 10 so that the installation of the core bar 5 does not affect the installation position accuracy of the anchor bolt 4. Finally, the pair of holding pieces 28 are engaged with the core rebar 5 from the side above the anchor bolt array plate 8 and the core rebar 5 is surrounded by the recesses 28a. Join and fix to the array plate 8.

  By attaching the holding piece 28 to the anchor bolt arrangement plate 8, the core rebar 5 supported on the inner frame 10 is further supported by the anchor bolt arrangement plate 8 and held in position. At this time, the weight of the core rebar 5 is supported by the inner frame 10, and the holding piece 28 attached to the anchor bolt array plate 8 bears a load that suppresses the inclination of the core rebar 5. Thus, the arrangement of the anchor bolt 4 and the core rebar 5 embedded in the foundation 2 is completed.

  When the arrangement of the anchor bolt 4 and the core rebar 5 is completed, the concrete of the foundation 2 is placed so as to embed the anchor device 1 installed on the ground G. The concrete is placed so that at least the anchor bolt array plate 8 and the periphery thereof are exposed, whereby the lower portions of the anchor bolt 4 and the core rebar 5 are embedded in the concrete.

  After the concrete is cured, the holding piece 28 is removed from the anchor bolt array plate 8. At this time, since the holding piece 28 has a configuration in which the holding member 12 is divided into the core rebar 5 so as to be disengageable from the side thereof, it is not necessary to pull out toward the upper end 5b of the core rebar 5 and the upper end 5b. Even if the upper spacer 27 is attached, it can be detached from the core rebar 5 without any trouble.

  Next, the nuts 14 at the upper ends 4a of all the anchor bolts 4 are removed, and the anchor bolt arrangement plate 8 is removed. Thereby, the base plate 6 of the column base part of the steel column member 3 can be joined and fixed to the upper end of the anchor bolt 4.

  That is, referring to FIG. 7 and FIG. 8 showing the steel column member 3 having the CFT structure, the anchor bolt 4 is attached to the base plate 6 by suspending the column steel pipe 3 a with the base plate 6 on the foundation 2. Simultaneously with the insertion through the anchor bolt insertion hole, the core rebar 5 is disposed so as to reach the inside of the steel column member 3 through the insertion hole 6 a of the base plate 6. Then, after the anchor bolt 4 is joined and fixed to the base plate 6, the concrete base C of the steel column member 3 in which the core rebar 5 protruding from the foundation 2 is fixed by placing concrete C inside the column steel pipe 3 a. A substructure is constructed.

  FIG. 9 shows an example of a steel column member 3 when the anchor device 1 according to the first embodiment is adopted in another SRC structure. FIG. 9A shows a case where the cross steel frame 3 b is used, and the core reinforcing bars 5 are inserted around the corners of the intersecting web and fixed by the column concrete C. FIG. FIG. 9B shows a case where an H-section steel 3c is used, and the core rebar 5 is inserted into the center of the column across the web and fixed by the column concrete C. The anchor device 1 according to the first embodiment can be preferably applied also to such a steel column member 3.

  In the anchor device 1 according to the first embodiment described above, at the stage where the anchor bolt 4 and the core rebar 5 are being disposed, the outer frame 9 that individually supports the anchor bolt 4 and the core rebar 5 individually. Since the inner frame 10 is provided, the anchor device 1 has a higher center of gravity due to the influence of the core rebar 5 than the structure in which both the anchor bolt 4 and the core rebar 5 are integrally assembled and supported from the beginning. Therefore, the anchor bolt 4 and the core rebar 5 can be assembled with high positional accuracy regardless of the height of the core rebar 5.

  Regarding the mutual positional relationship between the outer frame 9 and the inner frame 10, the connecting parts 11 can be positioned and connected with high accuracy, and the anchor bolt 4 and the core individually supported by the outer frame 9 and the inner frame 10 are connected. High positional accuracy can also be secured for the mutual positional relationship of the reinforcing bars 5.

  Further, since it is possible to avoid an increase in the center of gravity, it is possible to prevent a situation in which the anchor device 1 as a whole is tilted, and the anchor device 1 can be stably installed on the ground G side. Therefore, it is possible to ensure high accuracy of the arrangement position of the anchor bolt 4 and the like.

  In this way, the stability of the anchor device 1 can be ensured by separately supporting the anchor bolt 4 and the core rebar 5 during the installation work, so there is no need to increase the size of the anchor device 1 or increase the weight. In addition to improving the performance, it is possible to prevent an increase in cost.

  Since the holding member 12 that is detachably provided on the anchor bolt arrangement plate 8 and is engaged with and disengaged from the core rebar 5 in order to hold the core rebar 5 on the anchor bolt arrangement plate 8, a plurality of cores are provided by the spacers 26 and 27. Even when the reinforcing bar 5 is assembled and handled, when the core reinforcing bar 5 is built, the holding member 12 is removed, and after the core reinforcing bar 5 is built, the holding member 12 is joined to the anchor bolt array plate 8 to form the core. Since the rebar 5 can be held in position, even the core rebar 5 having the spacers 26, 27 and the like at the upper end 5b and the lower end 5a can be assembled to the anchor device 1 without any trouble, and the construction efficiency can be improved.

  Further, since the anchor bolt arrangement plate 8 is formed with an opening 13 through which the core rebars 5 can be inserted all together, the core rebar 5 can be incorporated into the anchor device 1 or the anchor bolt arrangement plate from the anchor device 1. 8 can be removed very easily and smoothly, and workability can be improved. Therefore, at any stage, the spacers 26 and 27 can be freely attached to the core rebar 5 for construction.

  Since the holding member 12 is divided into a plurality of holding pieces 28 that can be engaged and disengaged from the side with respect to the core rebar 5 inserted through the anchor bolt array plate 8 from the upper side to the lower side, the core rebar is configured. 5 can be further improved, and the degree of freedom in attaching the spacers 26 and 27 to the core rebar 5 can be further improved, and the workability can be improved.

  Specifically, the holding piece 28 can be easily removed from the core rebar 5 even after the concrete of the foundation 2 is cured. Therefore, the anchor bolt arrangement plate 8 can be easily removed after the holding piece 28 is removed. On the other hand, since the holding piece 28 can be attached / detached to / from the anchor bolt array plate 8 at any time, the degree of freedom in attaching the spacers 26, 27 to the core rebar 5 can be increased. Thereby, the workability of the core rebar 5 when using the spacers 26 and 27 can be significantly improved.

  Since the upper spacer 27 and the lower spacer 26 for maintaining the interval between the core reinforcing bars 5 are provided on the upper end 5b and the lower end 5a of the plurality of core reinforcing bars 5, respectively, and the lower spacer 26 is joined to the inner frame 10. When the number of core rebars 5 is large, it can be set and handled in advance by grounding or the like, and workability can be improved.

  In addition, since the inner frame 10, the outer frame 9, and the connecting part 11 are configured by a combination of L-shaped angle members, the inner frame 10 and the like can be mounted using the substantially right-angled corners of the L-shaped angle material. Assembly accuracy is high and can be assembled easily.

  FIG. 10 shows a modification of the first embodiment. FIG. 10 is a perspective view showing the inner frame 10 and the core rebar 5. Instead of the lower spacer 26, the core rebar 5 is provided with a guide plate 29 having a through hole through which the core rebar 5 is individually inserted at a midway position in the length direction of the core rebar 5. The core rebar 5 is assembled together by the upper spacer 27.

  The inner frame 10 is provided with a guide unit 30 including a leg member 30a standing on the receiving seat 24 in alignment with the support post 23 and a top plate 30b joined to the upper end of the leg member 30a. The top plate 30b has the same configuration as the guide plate 29 and has a through hole 30c.

  The insertion of the core rebar 5 onto the receiving seat 24 is guided using the through hole 30c of the top plate 30b as a guide. By the guide unit 30, the lower end 5a of the core rebar 5 can be smoothly guided and installed on the seat 24, and workability can be improved. Even in this modification, it is needless to say that the same effects as those of the above-described embodiment can be obtained.

  Next, an anchor device according to a second embodiment will be described in detail with reference to the drawings. 11 is a perspective view showing a second embodiment of the anchor device according to the present invention, FIG. 12 is a side view of the anchor device shown in FIG. 11, and FIG. 13 is applied to the anchor device shown in FIG. It is explanatory drawing of an inner frame. The description of the same configuration as the anchor device of the first embodiment is omitted.

  The anchor device 1 according to the second embodiment is preferably used in the case where the number of core rebars 5 is large and handled by grounding with the spacers 26 and 27 described above. In the example of illustration, the case where the core rebar 5 is nine is shown.

  As shown in FIG. 4B, these nine core rebars 5 are assembled by the upper spacer 27 and the lower spacer 26 while maintaining a mutual interval, as described in the first embodiment. Regarding the lower spacer 26, the sleeves 26b are arranged in a rhombus arrangement, and pipes 26c into which the lower ends 5a of the core rebars 5 are simply inserted are arranged at the four corners and the center of the lower spacer 26. Of the books, five core reinforcing bars 5 are held between the lower spacer 26 and the upper spacer 27.

  FIG. 4C shows a case where eight core reinforcing bars 5 are arranged in a ring shape in the circumferential direction of the spacers 26 and 27, and the central pipe 26c is omitted. Thus, even if the core rebar 5 is eight or nine, it can be assembled by the spacers 26 and 27.

  Corresponding to the large number of core rebars 5 and handling the core rebars 5 by assembling them in advance with the lower spacer 26, the inner frame 10 and the connecting parts 11 are configured in a different form from the first embodiment.

  As shown in FIG.11 and FIG.13, the connection part 11 is a base frame of the outer frame 9 comprised by the four frame materials 16a by combining the four connection materials 11c comprised by the L-shaped angle material. 16 and is provided in the base frame 16. In the connecting part 11, the tips of the four protruding legs 31 are joined to the projecting corner side r of each frame member 16 a of the base frame 16 so as to be substantially perpendicular to each other. Accordingly, the four connecting members 11c of the connecting parts 11 facing each other and the frame member 16a of the base frame 16 are arranged in parallel with each other.

  The inner frame 10 is connected to the four corners of the connecting part 11 at the bottom corner of the support column 17 of the outer frame 9, and the inner corner side q is inside the rectangular frame-shaped connecting part 11. It is composed of four columnar members 32 made of L-shaped angle members that are erected so as to face the space, and two belt-like plates 33 that are provided between a pair of pillar members 32 that face each other diagonally. Is done.

  The belt-like plate 33 is overlapped vertically and assembled in an X shape, and each end portion of the X shape is bonded and fixed to the entrance corner side q of the column member 32. A belt-like plate 33 assembled in an X shape serves as the receiving seat 24. The belt-like plate 33 is provided at an intermediate position in the height direction of the column member 32. The inner frame 10 is formed in the form of a frame by the pillar material 32 and the belt-like plate 33 and is fixed to the ground G side.

  On the belt-like plate 33, a lower spacer 26 for assembling the core rebar 5 is placed. The corners q of the four column members 32 protruding upward from the belt-like plate 33 guide the lowering of the lower spacer 26 when the core rebar 5 is placed on the inner frame 10.

  In 2nd Embodiment, although the lower end of each pillar material 32 is joined with respect to the four corners of the rectangular connection part 11 regarding the inner frame 10, the connection materials 11c adjacent at the four corners form a substantially right angle. If it is an arrangement, among the four connecting members 11c, one set of connecting members 11c facing each other is placed on the ground G so as to be joined to the lower end of the pillar 32, and another set facing each other. The connecting member 11c is floated upward from the ground G so as to be joined to the intermediate portion in the height direction of the pillar member 32, and is disposed sideways. The connecting member 11c on the ground G and the connecting member 11c floated from the ground G It goes without saying that the inner frame 10 in the form of a frame may be configured by connecting the columns with the column members 32.

  Even in the second embodiment, it is a matter of course that the same effects as the first embodiment can be obtained.

  The inner frame 10 is formed in the form of a frame in which four column members 32 are arranged at four corners, and is positioned between the column members 32 at an intermediate position in the height direction, and a belt-like plate 33 on which the lower spacer 26 is placed. Therefore, the core rebar 5 assembled integrally with the lower spacer 26 and the like can be easily and smoothly placed on the inner frame 10 with the entrance corner side q of the column member 32 as a guide.

  FIG. 14 shows a modification of the second embodiment. FIG. 14 is a perspective view showing the inner frame 10 and the core rebar 5. Instead of the lower spacer 26, the core rebar 5 is provided with a guide plate 29 having a through hole through which the core rebar 5 is individually inserted at a midway position in the length direction of the core rebar 5. The core rebar 5 is assembled together by the upper spacer 27.

  Instead of the belt-like plate 33 assembled in an X shape, a rectangular receiving plate 34 formed of a plate material is joined to the inner frame 10 at the upper end of the four column members 32. The lower end 5 a of the core rebar 5 is placed on the receiving plate 34. The receiving plate 34 may be provided with a sleeve 26b and a pipe 26c. Alternatively, the lower spacer 26 may be attached to the core rebar 5 and the lower spacer 26 may be joined to the receiving plate 34. Thereby, the lower end 5a of the core rebar 5 can be appropriately installed on the receiving plate 34, and workability can be improved.

  FIG. 15 shows another modification of the second embodiment. FIG. 15 is also a perspective view showing the inner frame 10 and the core rebar 5. The assembled state of the plurality of core rebars 5 is the same as in the case of FIG. 14, and the core rebars 5 are assembled together at a midway position in the length direction by the guide plate 29.

  In the inner frame 10, instead of this, a rectangular receiving plate 34 formed of a plate material is joined and fixed at the attachment position of the belt-like plate 33. A rectangular guide plate 35 is joined to the column member 32 so as to be positioned at the upper ends of the four column members 32 with an interval upward from the receiving plate 34.

  The guide plate 35 is formed with a diamond-shaped through hole 35a having a large diameter at the center and small holes 35b at four corners. The core reinforcing bars 5 positioned at the four corners of the core reinforcing bars 5 assembled by the guide plate 29 are inserted into the small holes 35b at the four corners. The remaining core rebar 5 is inserted through the through hole 35a.

  That is, the insertion of the core rebar 5 onto the receiving plate 34 is guided using the small hole 35b and the through hole 35a of the guide plate 35 as a guide. The receiving plate 34 may be provided with a sleeve 26b and a pipe 26c. Thereby, the lower end 5a of the core rebar 5 can be smoothly guided and installed on the receiving plate 34, and workability can be improved.

  Even in these modified examples, it is a matter of course that the same operational effects as the above-described embodiment can be obtained.

  16 and 17 show a modified example of the holding member 12 described above. 16A and 16B are explanatory views for explaining how the holding member 12 is attached and detached. FIG. 16A is a perspective view showing a state where the holding member 12 is completely attached, and FIG. It is a perspective view in the middle of attachment and removal. FIG. 17 is an explanatory diagram for explaining the holding pieces 40a and 40b constituting the holding member 12 shown in FIG. 16, and FIG. 17 (a) is a plan view showing a planar outline of the first holding piece 40a. 17 (b) is a plan view showing a planar outer contour of the second holding piece 40b, and FIG. 17 (c) is a plan view showing a state in which the first and second holding pieces 40a and 40b are vertically stacked.

  The holding member 12 according to this modification is suitable for use when two or more core rebars 5 are arranged in two rows. The holding member 12 is composed of two plate-like holding pieces 40a and 40b. In the example of illustration, holding piece 40a, 40b is formed from the rectangular board | plate material. Hereinafter, although the case where the number of the core rebars 5 is four will be described, the arrangement can be applied to two or more core rebars 5 in a two-row arrangement.

  The first holding piece 40a is formed with a first recess 36 that forms three sides a1, a2, and a3 that surround the core rebar 5 from three directions, and there are four first recesses 36 as four core rebars (5). Formed. In the figure, the first recesses 36 are each formed in a form having a notch opening 36a on each of the upper and lower edges.

  The second holding piece 40b is formed with the remaining one side a4 facing the core rebar 5 in order to surround the core rebar 5 surrounded by the three sides a1, a2 and a3 of the first recess 36 from four directions. An edge is formed, and two edges are formed corresponding to the two rows of core reinforcing bars 5. Specifically, the two edges forming the side a4 are formed by forming the second recess 37 in the second holding piece 40b. In the figure, the second recess 37 is formed in a form having a notch opening 37a on the right edge.

  And when the 2nd holding piece 40b is piled up and down on the length direction of the core rebar 5, ie, the height direction of the anchor apparatus 1, on the 1st holding piece 40a, the 1st recessed part 36 of the 1st holding piece 40a will be 1st. 2 A holding hole 38 that is partitioned by the edge (side a4) of the holding piece 40b and surrounds all the core rebars 5 individually from four sides and is detachably held is formed. In the illustrated example, four holding holes 38 are formed.

  Of course, each holding hole 38 is formed in accordance with the arrangement interval of the core reinforcing bars 5, and accordingly, the mutual interval between the first recesses 36 and the two edges (side a <b> 4) formed by the second recesses 37. The interval is set according to the outer diameter size and the arrangement pitch of the core rebar 5.

  In addition, as shown in FIG. 16, the first and second holding pieces 40a and 40b are formed with outer dimensions that hold the core rebar 5 and at least the edge thereof can be locked to the anchor bolt array plate 8, Thus, the anchor bolt arrangement plate 8 is detachably provided so as to be attachable / detachable.

  In the example shown in FIG. 16A, the end edges of the first and second holding pieces 40a and 40b can be removably engaged with the engagement holes 8b and the ribs 15 formed in the anchor bolt arrangement plate 8. A bent piece 39 is formed, and the holding pieces 40a and 40b are attached to the anchor bolt array plate 8 by locking the bent piece 39 to the locking holes 8b and the ribs 15.

  In the attaching and detaching operations, the second holding piece 40b is inserted / removed from the horizontal lateral direction to the outer periphery of the plurality of core rebars 5 with the notch openings 37a of the second recesses 37 facing the arranged core rebars 5. do it.

  On the other hand, with respect to the first holding piece 40a, at the position of the upper end 5b of the core rebar 5, each first recess 36 may be aligned with each core rebar 5 and then inserted / removed downward from above. Alternatively, the first holding piece 40a is inserted between the two rows of core rebars 5 so that the cutout openings 36a on the upper and lower edges of the first holding piece 40a are directed upward and downward, and then the first holding piece 40a. (Represented by R in the figure), so that each core rebar 5 is fitted into each first recess 36 via each notch opening 36a, and the removal operation is performed in the reverse procedure. good.

  18 and 19 show other modified examples of the holding member 12. 18A and 18B are explanatory views for explaining how the holding member 12 is attached and detached. FIG. 18A is a perspective view showing a state where the holding member 12 is completely attached, and FIG. It is a perspective view in the middle of attachment and removal. FIG. 19 is an explanatory diagram for explaining the holding pieces 40c and 40d constituting the holding member 12 shown in FIG. 18. FIG. 19A is a plan view showing a planar outline of the first holding piece 40c. 19 (b) is a plan view showing a planar outer contour of the second holding piece 40d, and FIG. 19 (c) is a plan view showing a state in which the first and second holding pieces 40c, 40d are superposed vertically.

  The holding member 12 according to this modification is suitable for use when three or more core rebars 5 are arranged in three rows. The holding member 12 is composed of two plate-like holding pieces. In the illustrated example, the holding pieces 40c and 40d are formed of a rectangular plate material. Hereinafter, the case where the number of core rebars 5 is nine will be described. However, if the arrangement is three rows, it can be applied to three or more core rebars 5.

  The first holding piece 40c is formed with three third concave portions 41 having a long length and three fourth concave portions 42 having a short length. The fourth concave portion 42 having a short length forms three sides a5, a6, and a7 that surround the core reinforcing bar 5 from three directions, and the three fourth concave portions 42 hold the three core reinforcing bars (5). It has become.

  On the other hand, the long third recess 41 includes three sides a8, a9, a10 that surround the core rebar 5 from three directions, and two opposite sides a9 of these three sides a8, a9, a10. , A10, the core rebar 5 is sandwiched from two opposite sides. That is, the number of the third concave portions 41 is three, and the six core reinforcing bars 5 are held. In the drawing, the third recess 41 and the fourth recess 42 are each formed in a form having cutout openings 41a and 42a on the upper and lower edges, respectively.

  In the second holding piece 40d, in order to surround the six core reinforcing bars (5) surrounded by the three sides a5 to a10 of the third concave portion 41 and the fourth concave portion 42 from four sides, the remaining face facing the core reinforcing bar 5 is left. An edge forming one side a11 is formed, and two edges are formed corresponding to the arrangement of two rows (first row and second row) of the core reinforcing bars 5. Specifically, the two edges forming the side a11 are formed by forming the fifth recesses 43 in the second holding piece 40d.

  Further, the second holding piece 40d has three remaining core reinforcing bars (5) sandwiched from two sides by the two sides a9 and a10 of the third concave portion 41 so as to surround the four core reinforcing bars (5) from four directions. Edges forming the two sides a12 and a13 are formed, and the edges are formed to face each other in correspondence with the arrangement of one row (third row) of the core reinforcing bars 5. Specifically, the two edges forming the sides a12 and a13 are formed by forming the sixth recess 44 in the second holding piece 40d. In the drawing, the fifth concave portion 43 and the sixth concave portion 44 are formed in a form having cutout openings 43a and 44a on the right edge.

  And when the 2nd holding piece 40d is piled up and down on the length direction of the core rebar 5, ie, the height direction of the anchor device 1, on the 1st holding piece 40c, the 3rd crevice 42 of the 1st holding piece 40c and the 2nd The four concave portions 43 are partitioned by four edges (sides a11, a11, a12, a13) of the second holding piece 40d, and holding holes 38 that surround all the core rebars 5 individually from four sides and are detachably held. It is formed. In the illustrated example, nine holding holes 38 are formed.

  Of course, each holding hole 38 is formed in accordance with the bar arrangement interval of the core rebar 5. Therefore, the third recesses 41, the fourth recesses 42, and the third and fourth recesses 41, 42 are mutually connected. The interval and the interval between the four edges (sides a11, a11, a12, a13) formed by the fifth recess 43 and the sixth recess 44 are set according to the outer diameter size and the arrangement pitch of the core rebar 5. .

  Further, as shown in FIG. 18, the first and second holding pieces 40c and 40d can be locked to the anchor bolt array plate 8 at least at the edges thereof while holding the core rebar 5 as shown in FIG. Thus, the anchor bolt arrangement plate 8 is detachably provided so as to be attachable / detachable.

  In the example shown in FIG. 18 (a), the first and second holding pieces 40c, 40d are folded at the end edges thereof so that they can be removably engaged with the engaging holes 8b and the ribs 15 of the anchor bolt arrangement plate 8. A bent piece 39 is formed, and the holding pieces 40c and 40d are attached to the anchor bolt array plate 8 by locking the bent piece 39 to the locking holes 8b and the ribs 15.

  In the attaching and detaching operations, with respect to the second holding piece 40d, a plurality of notch openings 43a and 44a of the fifth recessed portion 43 and the sixth recessed portion 44 are directed toward the arranged core rebars 5 along the rows from the horizontal lateral direction. What is necessary is just to make it insert / insert between the core rebar 5 of this.

  On the other hand, with respect to the first holding piece 40c, the third recess 41 and the fourth recess 42 are aligned with the position of the core rebar 5 at the position of the upper end 5a of the core rebar 5 and then inserted / removed downward from above. do it. Alternatively, the first holding piece 40c is inserted between the first and second rows of core rebars 5 so that the cutout openings 41a and 42a on the upper and lower edges of the first holding piece 40c are directed upward and downward, Thereafter, the first holding piece 40c is rotated (indicated by R in the figure), so that each core rebar 5 is fitted into each of the third recess 41 and the fourth recess 42 via the notch openings 41a and 42a. In the removal operation, the reverse procedure may be used.

  The holding member 12 according to the modification shown in FIGS. 16 to 19 has the same effect as the holding member 12 described in the above embodiment, and also holds holes 38 for holding the core rebars 5 individually. Is formed, and the installation position accuracy for each core rebar (5) can be further improved.

  FIG. 20 is a perspective view showing a modified example related to the column 23 of the inner gantry 10 described above. In this modification, the support column 23 is configured such that its length dimension can be expanded and contracted so that the height can be adjusted in the vertical direction. Specifically, the support column 23 includes a lower support column 46 connected to the connection part 11 and an upper support column 47 having a receiving seat 24.

  The lower support column 46 is formed with a guide portion 48 that slidably receives the upper support column 47 in a telescopic or nested manner. The guide portion 48 is provided with a push bolt 49, and by tightening the push bolt 49, the upper strut 47 slidably received by the guide portion 48 is fixed with respect to the lower strut 46, thereby the upper strut The height position of 47, and consequently the height dimension of the column 12 is set. A guide portion 48 may be provided on the upper support 47 and the lower support 45 may be slidably received in the guide 48.

  According to the column 12 according to the modification, the height can be adjusted, so that the fixing length of the core rebar 5 can be set as appropriate when assembling at the site. In the above-described embodiment, the support column 12 is an L-shaped angle member. However, the upper support column 47 and the lower support column 46 constituting the support column 12 according to this modification may be an angle member and a rod even if they are a combination of angle members. Even if it is a combination with steel materials etc., what kind of combination composition may be sufficient. The height-adjustable support column 12 can be preferably applied to any of the above-described embodiments.

  FIG. 21 is a perspective view showing a modified example of the installation mode for all the anchor devices 1 according to the embodiment. When the pile head exposed part X exists in the ground G side, embodiment in the case of installing the anchor apparatus 1 mentioned above in the position of the pile head exposed part X is shown, for example.

  In such a case, the frame structure can be installed on the ground G between the anchor device 1 and the ground G side for installing the anchor device 1 so that the anchor device 1 can be installed while avoiding the pile head exposed portion X. The anchor device 1 is provided on the base 50. The base 50 is preferably configured with a strength corresponding to the ground strength on which the anchor device 1 is installed. In the anchor device 1 of any of the above embodiments, the term “on the ground G” is not limited to the case where it is directly installed on the ground G itself, but also includes the case where it is installed on the ground G via the base 50. Is.

DESCRIPTION OF SYMBOLS 1 Anchor apparatus 4 Anchor bolt 4a Upper end part of anchor bolt 5 Core rebar 5a Lower end of core rebar 5b Upper end of core rebar 8 Anchor bolt arrangement plate 9 Outer frame 10 Inner frame 11 Connection part 12 Holding member 17 Support pillar 26 Lower spacer 27 Above Spacer 28 Holding piece 32 Column material 33 Strip plate G Ground

Claims (4)

An anchor bolt array plate that is formed in a rectangular frame shape and to which the upper ends of a plurality of anchor bolts arranged at intervals are fixedly joined;
An outer pedestal in the form of a skeleton for supporting a plurality of the anchor bolts on the ground, having four support pillars fixed on the ground side and disposed on the four corners of the anchor bolt arrangement plate;
Arranged on the inside of the outer frame and fixed on the ground side, the lower ends of a plurality of core members inserted from above to below are placed on the anchor bolt array plate, and these core members are supported on the ground. An inner frame to
Positioning the inner frame with respect to the outer frame, and connecting parts for connecting the two,
An anchor device comprising: a holding member that is detachably provided on the anchor bolt arrangement plate and is engaged with and disengaged from the core material in order to hold the core material on the anchor bolt arrangement plate.   The said holding member is divided | segmented into the several holding piece which can be engaged / disengaged from the side to the said core material penetrated to the said anchor bolt arrangement | sequence plate from the upper direction to the downward direction. The anchor device described.   2. An upper spacer and a lower spacer are provided at upper ends and lower ends of the plurality of core members, respectively, and the lower spacers are joined to the inner frame. Or the anchor apparatus of 2.   The inner frame is formed in a frame form in which four pillar members are arranged at four corners, and a receiving seat for placing the lower spacer is provided between the pillar members at an intermediate position in the height direction. The anchor device according to claim 3.

Images