JP2013064264A - Support frame for anchor bolt and method of constructing support frame - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an anchor bolt fixing device that achieves installation suitable for a state of foundation construction while a support frame supporting an anchor bolt is not an obstacle to beam/bar construction.SOLUTION: An anchor structure 10 is provided which has a plurality of anchor bolts arranged at predetermined intervals. A leg part structure 30 is provided which has a fixing frame 32 fixed with post-installed anchors S onto leveling concrete R. An intermediate part structure 20 is provided which is interposed between the anchor structure 10 and the leg part structure 30. The intermediate part structure 20 is provided with an upper frame 21 coupling lower end parts of anchor bolt 1 at predetermined arrangement intervals. The intermediate part structure 20 is provided with a lower frame 22 detachably coupled to upper end parts of support legs 31. The upper frame 21 and lower frame 22 are coupled together by a coupling member 23. The intermediate part structure 20 is configured to be post-installed on the leg part structure 30 fixed on the leveling concrete R.

Description

  The present invention relates to a support frame for anchor bolts and a method for constructing a support frame that can be installed according to the situation without disturbing the installation work of the reinforcement for the foundation.

  In order to fix the anchor bolt of the building structure to the foundation, a support frame is constructed in advance at a position where the anchor bolt is fixed, and the anchor bolt is fixed to the support frame. Next, after assembling main bars and hoops that form the foundation around the support frame, concrete is cast to fix the anchor bolts together with the support frame.

  In the column bolt anchor bolt installation device described in Patent Document 1, the vertical member constituting the support frame is divided into an upper vertical member and a lower vertical member, and the lower member of the upper vertical member holding the anchor bolt is divided into two parts. The upper base is arranged, and the lower base anchored to the discarded concrete is arranged at the lower end of the lower vertical member. And an upper vertical member is joined to a lower vertical member, and an installation apparatus is comprised.

  On the other hand, the anchor bolt fixing device described in Patent Document 2 is a support frame previously proposed by the inventors. That is, a connecting frame body in which long nuts are mounted in accordance with the distance between anchor bolts arranged at the four corners of the accessory plate, and a rod-like shape that is connected to the upper end portion of the long nut of the connecting frame body and connected to the anchor bolt An anchor holding part and an adjusting bolt connected to the lower end of the long nut of the connecting frame are provided. Then, the adjustment bolt is rotatably mounted on the upper surface of the support plate installed on the discarded concrete so that the height of the anchor bolt can be adjusted, and the adjusted adjustment bolt is welded on the support plate. Is provided.

JP 2000-314139 A Japanese Patent No. 4389097

  In the installation apparatus of Patent Document 1, an upper vertical member is joined to a lower vertical member anchored to discarded concrete, and an anchor bolt of a building structure is connected to a side surface of the upper vertical member. Therefore, on the discarded concrete, the lower vertical member is installed at a position deviated from the position where the anchor bolt is installed. However, in order to construct the foundation, there is an operation of assembling a beam reinforcement for the underground beam in addition to the main reinforcement for the foundation. For this reason, there is a possibility that the lower vertical members that are out of the position where the anchor bolts are installed may cross the beam bars, etc. To arrange the lower vertical members so as not to cross the beam bars, etc. And negotiating with a design management company to secure the space for assembling the lower vertical members.

  On the other hand, the fixing device described in Patent Document 2 previously proposed by the present inventor is a connection frame body in which a long nut is mounted in accordance with the interval between the anchor bolts, and an adjustment that is connected to the lower end of the long nut of the connection frame body. The adjustment bolt is rotatably mounted so that the height of the anchor bolt can be adjusted, and the adjustment bolt after adjustment is provided so as to be welded onto the support plate. The body and the adjustment bolt are installed along the position where the anchor bolt is installed. For this reason, installation and adjustment of anchor bolts can be performed very easily without crossing the beam bars.

  However, in recent foundation work, there is a tendency to dig to the width of the foundation beam instead of digging the width of the base part widely. In such foundation work, as in the fixing device of Patent Document 2, it is necessary to install the adjustment bolt after adjustment onto the support plate. Therefore, installation work of the support plate and welding work of the adjustment bolt are very difficult. Would be cramped.

  Moreover, since the fixing device of Patent Document 2 installs the connecting frame body and the adjusting bolt along the position where the anchor bolt is installed, the upper anchor bolt and the lower anchor holding portion are always connected via the long nut. It was necessary to connect and use. For this reason, the total weight of the fixing device is 100 kg or more, and heavy machinery is indispensable for installing the fixing device. However, there are places where it is difficult to install heavy machinery depending on the site, and locations that cannot be reached by heavy machinery.

  Further, the beam bars used for the corner portions of the foundation are arranged in a state where the ends of the horizontal reinforcing bars are bent vertically upward. However, when the fixing device of Patent Document 2 is installed first, there is a disadvantage that it is not possible to install the bent beam.

  Therefore, the present invention was created to solve the above-described problems, and the support frame that supports the anchor bolt does not interfere with the beam reinforcement work, and can be installed suitable for the foundation work situation. It is an object of the present invention to provide a support frame for use and a method for constructing the support frame.

  In order to achieve the above-mentioned object, a first means in the present invention is an anchor structure in which a plurality of anchor bolts are arranged at a predetermined arrangement interval in a template connected to an upper end portion of an anchor bolt 1 of a building structure. 10 and four support legs 31 at positions extending downward from the lower ends of the anchor bolts 1 at the four corners of the anchor bolt 1 disposed on the anchor structure 10, and the lower ends of the respective support legs 31 And a leg part 30 having a fixing frame 32 fixed on the discarded concrete R with a post-cast anchor S, and an intermediate part interposed between the anchor part 10 and the leg part 30 An anchor bolt fixing device comprising a component 20, wherein the intermediate component 20 is attached to an upper frame 21 that connects a lower end portion of the anchor bolt 1 at a predetermined arrangement interval and an upper end portion of a support leg 31. The lower frame 22 that is freely connected is formed in a frame shape that is connected in parallel by a connecting member 23 so that the intermediate structure 20 can be retrofitted to the leg structure 30 fixed on the discarded concrete R. It is in the configuration.

  The second means is that, in the intermediate part structure 20, the upper frame 21 and the lower frame 22 are formed in a rectangular shape with strip steel plates, and the anchor bolts 1 are arranged on the plate surface of the upper frame 21 in a predetermined manner. Anchor connecting holes 21A to be connected at intervals are opened, bolt connecting holes 22A to connect the support legs 31 to the plate surface of the lower frame 22, and the anchor connecting holes 21A and the bolt connecting holes 22A are opened. The connecting member 23 is fixed at the four corners deviated from the position.

  The third means is that, in the leg structure 30, the fixed frame 32 is formed of a strip steel plate in a rectangular shape, and an anchor insertion hole 32A for inserting the post-placed anchor S into the plate surface of the fixed frame 32 is opened. The support leg 31 is erected vertically below the anchor bolt 1 installation position at the four corners of the fixed frame 32, and the connecting bolt 33 fixed to the upper end of the support leg 31 is provided with the intermediate portion configuration. The lower frame 22 of the body 20 is connected so as to be adjustable in height.

  In the fourth means, the connecting bolt 33 of the leg structure 30 is a bolt having the same diameter as the anchor bolt 1 and a thread having a pitch larger than the pitch of the anchor bolt 1 is formed. A height adjusting nut that supports the lower frame 22 of the intermediate structure 20 is attached to the connecting bolt 33.

  A fifth means includes an anchor structure 10 in which a plurality of anchor bolts are arranged at a predetermined arrangement interval in a template connected to an upper end portion of the anchor bolt 1 of a building structure, and a lower end portion of the anchor bolt 1. An intermediate part structure 20 having a frame shape in which an upper frame 21 connected to a predetermined arrangement interval and a lower frame 22 detachably connected to the upper end of the support leg 31 are connected in parallel by a connecting member 23; Four support legs 31 are provided at positions extending downward from the lower ends of the anchor bolts 1 at the four corners of the anchor bolt 1 disposed in the anchor structure 10, and are fixed to the lower ends of the respective support legs 31. And a construction method of a support frame for an anchor bolt comprising a leg component 30 having a fixing frame 32 fixed on a discarded concrete R with a post-cast anchor S. The intermediate structure 20 is connected, the anchor structure 10 is lifted together with the intermediate structure 20 by a heavy machine, and the intermediate structure is formed together with the anchor structure 10 on the leg structure 30 fixed on the discarded concrete R. There is a method for constructing a support frame for retrofitting the body 20.

  The sixth means includes an anchor structure 10 in which a plurality of anchor bolts are arranged at predetermined intervals in a template 11 connected to an upper end portion of the anchor bolt 1 of a building structure, and a lower end portion of the anchor bolt 1 An intermediate part structure 20 having a frame shape in which an upper frame 21 that connects the upper frame 21 and a lower frame 22 that is detachably connected to the upper end of the support leg 31 are connected in parallel by a connecting member 23; Four support legs 31 are provided at positions extending downward from the lower ends of the anchor bolts 1 at the four corners of the anchor bolt 1 disposed on the anchor structure 10, and fixed to the lower ends of the support legs 31. And a method for constructing an anchor bolt support frame comprising a leg component 30 having a fixed frame 32 fixed on a discarded concrete R by a post-cast anchor S. In the construction method of the support frame, the intermediate part structure 20 is connected to the leg part structure 30 fixed on the upper part, and then the anchor bolt 1 and the template 11 of the anchor structure 10 are individually assembled to the intermediate part structure 20. is there.

  According to the first aspect of the present invention, the leg portion structure 30 is provided with four supports at positions extending downward from the lower ends of the anchor bolts 1 at the four corner positions of the anchor bolt 1 disposed on the anchor structure 10. Since the structure including the legs 31 is provided, the support frame for supporting the anchor bolts does not hinder the beam reinforcement work, and the leg structure 30 fixed on the discarded concrete R has an intermediate portion. By configuring the structure 20 so that it can be retrofitted, installation suitable for the situation of the foundation work is possible.

  Further, the intermediate part structure 20 includes an upper frame 21 that connects the lower end portion of the anchor bolt 1 at a predetermined arrangement interval, and a lower frame 22 that is detachably connected to the upper end portion of the support leg 31 by a connecting member 23. Since the frame is connected to the upper part of the leg part 30, the position of the anchor bolt 1 connected to the upper part 21 is also adjusted at the adjustment position where the lower part 22 of the intermediate part 20 is connected to the upper part of the leg part 30. can do.

  According to the intermediate part structure 20 as in claim 2, the anchor connection hole 21 </ b> A for connecting the anchor bolt 1 at a predetermined arrangement interval is opened on the plate surface of the upper frame 21, and the plate surface of the lower frame 22 is Since the bolt connecting holes 22A for connecting the support legs 31 are opened, and the connecting members 23 are fixed to the four corners deviated from the opening positions of the anchor connecting holes 21A and the bolt connecting holes 22A. Since the support leg 31 of the leg component 30 can be connected along the position where the anchor bolt 1 is installed, the support leg 31 does not hinder the placement of the beam line such as the underground beam. That's it.

  In addition, since the intermediate structure 20 is positioned above the anchor structure 10, the intermediate structure 20 itself is not obstructed when the beam bars P such as underground beams are provided. As a result, it has become unnecessary to examine the arrangement of bars that was necessary in the past. Furthermore, since the upper frame 21 and the lower frame 22 formed of a steel strip form a double structure, not only the intermediate structure 20 but also the anchor structure 10 connected to the intermediate structure 20. Moreover, the intensity | strength of the leg structure 30 whole can be raised.

  According to the leg part structure 30 as in claim 3, the fixed frame 32 is formed in a rectangular shape with a strip steel plate, and the support legs 31 are positioned vertically below the anchor bolt 1 installation positions at the four corners of the fixed frame 32. Since the support legs 31 are erected, the support legs 31 do not interfere with the arrangement of the beam bars P and the like. Moreover, since the anchor insertion hole 32A for inserting the post-fixed anchor S is opened on the plate surface of the fixed frame 32, the leg component 30 can be fixed according to the ground mark of the discarded concrete R. Therefore, the conventional installation work of the support plate and the welding operation of the adjusting bolt are not required at all, and it can be easily installed even with the narrowed leeks. Furthermore, since it is directly matched with the ground ink of the discarded concrete R, position adjustment by swinging down becomes unnecessary, and installation time can be shortened. Moreover, it is also possible to visually check the ground ink after installation.

  In addition, support legs 31 are erected vertically at the four corners of the fixed frame 32 at positions where the anchor bolts 1 are installed, and the lower part of the intermediate structure 20 is connected to the connecting bolts 33 fixed to the upper ends of the support legs 31. Since the frame 22 is configured to be connected so that the height can be adjusted, the support bolt having the same diameter as that of the anchor bolt 1 is discarded and it is easier to handle than the case where it is extended to the concrete R, and the construction cost is reduced. It becomes possible.

  As in claim 4, a thread having a pitch larger than the pitch of the anchor bolt 1 is formed as the connection bolt 33 of the leg structure 30, and the lower frame 22 of the intermediate structure 20 is formed on the connection bolt 33. By attaching the height adjusting nut that supports the connecting bolt 33, the height and the horizontal position of the intermediate structure 20 connected to the connecting bolt 33 can be adjusted very efficiently.

  According to the construction method of the support frame as in claim 5, the intermediate structure 20 is connected to the anchor structure 10, the anchor structure 10 is lifted together with the intermediate structure 20 by the heavy machine Q, and the discarded concrete R Since the intermediate structure 20 is retrofitted together with the anchor structure 10 to the leg structure 30 fixed to the support structure, the support frame that supports the anchor bolts does not hinder beam reinforcement work. And since the leg part structure 30 can be installed previously, the installation suitable for the condition of foundation construction is attained. In particular, even in a state where the ends of the beam bars used for the corners of the foundation are bent, the bars can be easily arranged if only the leg component 30 is installed.

  According to the construction method of the support frame as in claim 6, the intermediate structure 20 is connected to the leg structure 30 fixed on the discarded concrete R, and then the anchor structure 10 is connected to the intermediate structure 20. Since the anchor bolt 1 and the template 11 are individually assembled, it is possible to assemble the anchor bolt 1 at the site even in places where it is difficult to install heavy machinery or where the heavy machinery cannot be transported.

It is a front view of the use condition which shows one Example of this invention. It is a disassembled perspective view which shows one Example of this invention. It is a perspective view which shows the position Example of the leg structure of this invention. It is a perspective view which shows the relationship between the intermediate part structure and leg part structure of this invention. It is a perspective view which shows one Example of this invention. (A) thru | or (d) are process drawings which show the construction method of this invention. It is a disassembled perspective view which shows the other construction method of this invention.

  According to the present invention, the initial object such that the support frame for supporting the anchor bolts does not hinder the reinforcement work and can be installed in accordance with the situation of the foundation work is achieved.

  Examples of the present invention will be described below. The basic structure of the support frame of the present invention includes an anchor structure 10, an intermediate structure 20, and a leg structure 30 (see FIG. 1).

  An anchor structure 10 is a template 11 connected to the upper end of an anchor bolt 1 of a building structure, and a plurality of anchor bolts are arranged at a predetermined arrangement interval. The lower end portion of the bolt 1 is usually connected in advance to an intermediate portion structure 20 described below (see FIG. 2).

  The intermediate structure 20 is a structure interposed between the anchor structure 10 and a leg structure 30 described later, and includes an upper frame 21, a lower frame 22, and a connecting member 23 ( (See FIG. 3).

  The upper frame 21 is a member that connects the lower end of the anchor bolt 1 to a predetermined arrangement interval (see FIG. 2). The upper frame 21 in the illustrated example is formed of a strip steel plate in a rectangular shape, and an anchor connection hole 21A for connecting the lower end portion of the anchor bolt 1 at a predetermined arrangement interval is opened on the plate surface of the upper frame 21 ( (See FIG. 3).

  The lower frame 22 is a member that is detachably connected to an upper end portion of a support leg 31 of a leg structure 30 described later (see FIG. 2). The lower frame 22 in the illustrated example is formed of a strip steel plate in a rectangular shape, and has a bolt connection hole 22 </ b> A for connecting the support leg 31 to the plate surface of the lower frame 22.

  The connecting member 23 is a member that connects the upper frame 21 and the lower frame 22 (see FIG. 3). The connecting member 23 is located at the four corner positions away from the drilling positions of the anchor connecting hole 21A opened in the upper frame 21 and the bolt connecting hole 22A opened in the lower frame 22. Are connected. The illustrated connecting member 23 uses a steel material having a substantially L-shaped cross section, and is welded along the inner corners of the four corners of the upper frame 21 and the lower frame 22.

  The leg component 30 is a component that is fixed on the discarded concrete R with a post-cast anchor S, and this leg component 30 is composed of a support leg 31 and a fixed frame 32 (see FIG. 4). ).

  The support legs 31 are provided at positions extending downward from the lower ends of the anchor bolts 1 at the four corner positions of the anchor bolts 1 disposed on the anchor structure 10, and in the illustrated example, a steel material having an L-shaped cross section. The four support legs 31 are formed. And it welds to the four-corner upper surface of the fixed frame 32 (refer FIG. 4).

  Further, a connecting bolt 33 is fixed to the upper end of the support leg 31. Then, a height adjusting nut 34 is attached to the connecting bolt 33, and the lower frame 22 of the intermediate structure 20 is connected to and supported by the connecting bolt 33 (see FIG. 5). . The illustrated connecting bolt 33 is a bolt having the same diameter as the anchor bolt 1 and has a thread having a pitch larger than the pitch of the anchor bolt 1 and is fixed by a fixing nut 35 (see FIGS. 4 and 5).

  The fixed frame 32 is a member that is fixed to the lower end portions of the support legs 31 and fixed to the discarded concrete R with the post-cast anchor S. The illustrated fixed frame 32 is formed of a strip steel plate in a rectangular shape, and has an anchor insertion hole 32A through which the post-fixed anchor S is inserted in the plate surface of the fixed frame 32 (see FIG. 4).

  In the support frame of the present invention, the intermediate part structure 20 can be retrofitted to the leg part structure 30 fixed on the discarded concrete R. At this time, a method of constructing the intermediate structure 20 in a state where the anchor structure 10 is connected (see FIG. 6) and a method of constructing the intermediate structure 20 in a state where the anchor structure 10 is not connected (FIG. 7). Reference) can be selected.

  That is, one of the construction methods of the support frame of the present invention using the anchor structure 10, the intermediate structure 20, and the leg structure 30 having the above-described structure is to connect the intermediate structure 20 to the anchor structure 10. This is a method of building in a state (see FIG. 6). That is, the leg part structure 30 is installed on the discarded concrete R (see FIG. 5A). Next, after arranging the beam bars P and the like (see (B) in the same figure), the anchor structural body 10 is lifted together with the intermediate structural body 20 by a heavy machine and moved onto the leg structural body 30 (FIG. See c). And the intermediate part structure 20 is connected with the leg part structure 30 with the anchor structure 10 (refer the same figure (d)).

  In addition, another method for constructing the support frame of the present invention using the anchor structure 10, the intermediate structure 20, and the leg structure 30 having the above-described structure includes the anchor structure 10, the intermediate structure 20, and the like. Are constructed in a state where they are not connected in advance (see FIG. 7). That is, only the intermediate structure 20 is connected to the leg structure 30 fixed on the discarded concrete R. Thereafter, the anchor bolts 1 are individually connected to the intermediate structure 20 and the template 11 is assembled to the anchor bolts 1.

  In the embodiment of the present invention, it is described that the anchor bolt fixed to the foundation of the building structure is supported, but the anchor bolt is not limited to the illustrated example. Further, the configurations and shapes of the anchor structure 10, the intermediate structure 20, and the leg structure 30 according to the present invention are not limited to the illustrated examples, and design changes within a range not changing the gist of the present invention are possible. It can be done arbitrarily.

P Beam reinforcement Q Heavy machinery R Discarded concrete S Post-cast anchor 1 Anchor bolt 10 Anchor structure 11 Template 11A Anchor connection hole 20 Middle structure 21 Upper frame 21A Anchor connection hole 22 Lower frame 22A Bolt connection hole 23 Connection member 30 Leg Constituent body 31 Support leg 32 Fixing frame 32A Anchor insertion hole 33 Connecting bolt 34 Height adjusting nut 35 Fixing nut

Claims (6)

An anchor structure in which a plurality of anchor bolts are arranged at predetermined intervals in a template connected to an upper end portion of an anchor bolt of a building structure, and positions of four corners of the anchor bolt arranged in the anchor structure Leg having four support legs at a position extending downward from the lower end of the anchor bolt, fixed to the lower end of each support leg, and fixed to the discarded concrete with a post-cast anchor An anchor bolt fixing device comprising a part structure, and an intermediate part structure interposed between the anchor structure and the leg structure,
The intermediate structure has a frame shape in which an upper frame that connects the lower end of the anchor bolt at a predetermined arrangement interval and a lower frame that is detachably connected to the upper end of the support leg are connected in parallel by a connecting member. A support frame for anchor bolts, wherein the intermediate part structure can be retrofitted to the leg part structure fixed on the discarded concrete.   In the intermediate part structure, the upper frame and the lower frame are formed in a rectangular shape with strip steel plates, and an anchor connection hole for connecting the anchor bolts at a predetermined arrangement interval is opened on a plate surface of the upper frame. The bolt connecting hole for connecting the support leg to the plate surface of the lower frame is opened, and the connecting member is fixed to the four corners deviated from the opening positions of the anchor connecting hole and the bolt connecting hole. Support frame for anchor bolts.   In the leg structure, the fixed frame is formed in a rectangular shape with a strip steel plate, and an anchor insertion hole for inserting the post-placed anchor is formed in a plate surface of the fixed frame, and the anchors at four corners of the fixed frame are formed. The support leg is erected vertically below the bolt installation position, and the lower frame of the intermediate structure is connected to a connection bolt fixed to the upper end of the support leg so that the height can be adjusted. The anchor bolt support frame according to claim 1.   The connecting bolt of the leg structure is a bolt having the same diameter as the anchor bolt, and a thread having a pitch larger than the pitch of the anchor bolt is formed, and the intermediate structure is formed on the connecting bolt. 4. The anchor bolt support frame according to claim 3, further comprising a height adjusting nut for supporting the lower frame. An anchor structure in which a plurality of anchor bolts are arranged at a predetermined arrangement interval in a template that is connected to an upper end portion of an anchor bolt of a building structure, and an upper frame that connects the lower end portions of the anchor bolt to a predetermined arrangement interval. And a lower frame that is detachably connected to the upper end of the support leg, and an intermediate part structure that is connected in parallel by a connecting member, and positions of the four corners of the anchor bolts disposed on the anchor structure Leg having four support legs at a position extending downward from the lower end of the anchor bolt, fixed to the lower end of each support leg, and fixed to the discarded concrete with a post-cast anchor A construction method of a support frame for an anchor bolt composed of a part structure,
The intermediate structure is connected to the anchor structure, the anchor structure is lifted together with the intermediate structure by a heavy machine, and the intermediate structure together with the anchor structure is attached to the leg structure fixed on the discarded concrete. A method for constructing a support frame for an anchor bolt, which is retrofitted. An anchor structure in which a plurality of anchor bolts are arranged at a predetermined arrangement interval in a template that is connected to an upper end portion of an anchor bolt of a building structure, and an upper frame that connects the lower end portions of the anchor bolt to a predetermined arrangement interval. And a lower frame that is detachably connected to the upper end of the support leg, and an intermediate part structure that is connected in parallel by a connecting member, and positions of the four corners of the anchor bolts disposed on the anchor structure Leg having four support legs at a position extending downward from the lower end of the anchor bolt, fixed to the lower end of each support leg, and fixed to the discarded concrete with a post-cast anchor A construction method of a support frame for an anchor bolt composed of a part structure,
A support frame for anchor bolts, wherein the intermediate structure is connected to the leg structure fixed on the discarded concrete, and then the anchor bolt and the template of the anchor structure are individually assembled to the intermediate structure. How to build.

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