JP2006342533A - Anchor bolt positioning device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an anchor bolt positioning device which can be easily and accurately adjusted at a leveling string provided away in an upward direction. <P>SOLUTION: This anchor bolt positioning device is equipped with a main body plate 10 which is held in a position above a top surface of a foundation, and a sub-plate 20 which is provided on the downside of the main body plate 10 in parallel. An aiming hole 11 is formed in the main body plate 10 in a penetrating manner, and aiming center marks 12a-12d and 13a-13d, which indicate the center of the aiming hole 11, are provided from a top surface 10d to a peripheral surface 11a of the aiming hole 11. A small-diameter bolt inserting hole 21, which is concentric with the aiming hole 11 and wherein an anchor bolt B is to be held in an inserted state, is formed in the sub-plate 20 in a penetrating manner, and bolt center marks 22a-22d, which indicate the center of the bolt inserting hole 21, are each provided in vertical lower positions with respect to the aiming center marks 12a-12d and 13a-13d. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an anchor bolt positioning device for accurately aiming an installation position of an anchor bolt in order to install an anchor bolt embedded in a foundation at a predetermined position.

  Conventionally, when an anchor bolt is embedded in a foundation, the height and verticality of the anchor bolt are adjusted and placed at an accurate position on the foundation before placing concrete foundation.

  Here, in order to obtain an accurate installation position of the anchor bolt, a water thread is used (for example, refer to Patent Document 1).

  First, a water string is stretched in a grid pattern above an anchor bolt to be installed. Next, a vertical direction setting device with a weight attached to the tip from the intersection of the water strings is lifted. Or look down from the intersection.

Then, the anchor bolt positioning device is horizontally moved so that the top of the anchor bolt is positioned directly below the intersection. As a result, the anchor bolt is installed at an accurate position.
JP 2000-319916 A

  By the way, in order to ensure the exact position of the water thread, a predetermined distance must be provided between the water thread and the anchor bolt, and the water thread has to be looked down from above.

  For this reason, in order to install the anchor bolt at an accurate position, it is necessary to view the intersecting portion of the water yarns from an accurate vertical direction, and there is a problem that it is difficult to obtain an accurate position.

  Further, even when the vertical direction setting device is used, it is difficult to accurately aim in the vertical direction from the upper side to the lower side.

  SUMMARY OF THE INVENTION An object of the present invention is to provide an anchor bolt positioning device that can easily and accurately aim at a water thread that is provided apart upward.

  In order to solve the above-described problem, an anchor bolt positioning device according to the first aspect of the present invention is to install an anchor bolt embedded in a foundation at a predetermined position and to be held above a base top surface. A plate and a sub-plate provided in parallel to the lower side of the main body plate. The main body plate has an aiming hole penetratingly formed, and an aiming core mark indicating the center of the aiming hole is formed from the upper surface. A bolt insertion hole, which is concentric with the aiming hole and has a small diameter and through which the anchor bolt is inserted, is formed in the sub-plate, and the center of the bolt insertion hole is formed in the sub plate. The bolt core mark shown is provided vertically below the aiming core mark.

  According to a second aspect of the present invention, in the anchor bolt positioning device according to the first aspect, the main body plate or the sub plate is provided with a level.

  According to the invention of claim 1 of the present application, the water thread provided above the anchor bolt positioning device is aligned with the aiming core mark provided on the upper surface of the main body plate and the bolt core mark provided on the sub plate. The center of the bolt insertion hole and the water thread can be accurately aimed by aligning the position of the water thread with the aiming core mark provided on the peripheral surface of the aiming hole and the bolt core mark provided on the sub-plate. Can do.

  In other words, the sighting core mark on the upper surface of the main body plate at a position horizontal to the water thread and the sighting core mark on the peripheral surface of the aiming hole at a position perpendicular to the water thread are respectively connected to the water thread and the bolt core. Align the mark. Thereby, the anchor bolt positioning device can be accurately aimed at the water thread.

  Furthermore, by aligning the aiming core mark extending along the horizontal direction and the vertical direction with respect to the water thread and aligning it with the water thread, the position can be easily and accurately without looking down from the exact vertical direction. Can be combined.

  According to the second aspect of the present invention, in addition to the effect of the first aspect, the main body plate and the sub-plate that must be level with respect to the water thread in order to prevent the positional deviation from the water thread can be easily and reliably provided. Can be held horizontally.

  That is, if the main body plate and the sub-plate are not parallel to the water thread provided in the horizontal direction above the anchor bolt positioning device, a displacement occurs between the position of the water thread and accurate aiming cannot be performed. .

  For this reason, by providing a level, the positional deviation between the water thread and the main body plate and the sub plate is prevented, and the position of the aiming core mark on the main body plate and the bolt core mark on the sub plate exactly matches the water thread. Can be made.

  And it becomes possible to improve the positioning accuracy and to prevent the anchor bolt held by the sub-plate from being inclined.

  Further, when this level is made detachable, it can be attached at an arbitrary position only when the level is used, and the usability is further improved.

  Next, an anchor bolt positioning device according to the best mode for carrying out the present invention will be described with reference to the drawings.

  In FIG. 1, reference numeral 1 denotes an anchor bolt positioning device (hereinafter referred to as a positioning device) according to the present invention, which includes a main body plate 10 and a sub plate 20 provided on the lower side of the main body plate 10.

  As shown in FIG. 1, the positioning device 1 is supported by a rising member 4 erected upward from a base member 3 fixed to a reinforcing bar 2 arranged on a building foundation.

  Here, the reinforcing bars 2 are laid out in a grid pattern on the ground surface leveled in a substantially horizontal state and spaced apart at substantially equal intervals. And it binds using an annealed iron wire etc. (not shown) so that many rebars 2 may not move.

  The base member 3 is fixed to the reinforcing bar 2 near the place where the anchor bolt B is installed, and has a pair of round bars 3a and a nut 3b welded to the round bars 3a.

  The pair of round bars 3a are processed into a U-shape by bending each intermediate portion, and the bent intermediate portions are opposed to each other, and a nut 3b is sandwiched therebetween and welded. Further, both end portions are fixed to the reinforcing bar 2 by an unillustrated annealed wire or the like.

  The rising member 4 is formed of a stainless steel rod which is not easily corroded, and has screw grooves 4a and 4b (see FIG. 3) at the lower and upper portions as shown in FIG.

  The screw groove 4 a located at the lower part of the rising member 4 is supported by being screwed into the nut 3 b of the base member 3. By adjusting the screwing amount, the rising member 4 can be moved in the vertical direction.

  Moreover, the screw groove 4b located in the upper part of the rising member 4 is screwed into the screw hole of the magnet body 5 mentioned later, and the magnet body 5 is attached to this upper part.

  The rising member 4 has a length (height) at which the tip (top) is positioned above the basic top surface planned line 6 (see FIG. 3) in a state of being erected on the base member 3. .

  The magnet body 5 has a magnet (not shown) incorporated therein, and as shown in FIG. 3, the magnet 5 is turned upward by turning the switch 5a so that the upper surface 5b of the magnet body 5 is magnetized. It has become. Further, a screw hole (not shown) into which the screw groove 4b of the rising member 4 is screwed is formed on the lower surface 5c.

  Here, the main body plate 10 is formed of a magnetic steel strip having a thickness of 4.5 mm, and both end portions 10a and 10b extend in directions different from each other by 90 ° (directions orthogonal to each other). Thereby, it is L shape in planar view (refer FIG. 1).

  The main body plate 10 has circular aiming holes 11 penetratingly formed in the vicinity of both end portions 10a and 10b and the corner portion 10c. In addition, the internal diameter of each aiming hole 11 is 40 mm here.

  Further, on the upper surface 10d of the main body plate 10, as shown in FIG. 2, first to fourth main body plate side aiming core marks (hereinafter referred to as plate core marks) 12a, 12b, 12c, which indicate the center of the aiming hole 11, 12d is formed.

  The first to fourth plate core marks 12a to 12d are marks provided along the directions orthogonal to each other through the center of the aiming hole 11. In other words, the line P connecting the first plate core mark 12a and the third plate core mark 12c located at positions facing each other and the first plate core mark 12a and the fourth plate core mark 12d positioned facing each other are connected. The point R where the line Q intersects becomes the center of the aiming hole 11 (see FIG. 2).

  Each of the plate core marks 12a to 12d is formed by forming a linear groove extending a predetermined length from the periphery of the aiming hole 11 on the upper surface 10d of the main body plate 10 and coloring the inside of the groove. .

  Further, on the peripheral surface 11a of the aiming hole 11, as shown in FIG. 2, first to fourth aiming hole side aiming core marks (hereinafter referred to as aiming holes) that are continuous from the first to fourth plate core marks 12a to 12d, respectively. 13a, 13b, 13c, and 13d are formed along the vertical direction.

  The aiming hole core marks 13a to 13d are also formed by forming a linear groove on the peripheral surface 11a of the aiming hole 11 and coloring the groove.

  Thus, since each plate core mark 12a-12d and each aiming hole core mark 13a-13d are continuous, the aiming core mark is formed from the upper surface 10d of the main body plate 10 to the peripheral surface 11a of the aiming hole 11. It will be.

  On the other hand, the sub-plate 20 is provided so as to be positioned below each aiming hole 11, and includes a bottom wall 20a and side walls 20b and 20c that stand from both sides of the bottom wall 20a. As a result, the sub-plate 20 has a U-shaped cross section (see FIG. 3).

  Here, the sub-plate 20 is formed of a steel plate having a thickness of 3.2 mm. The height of the side walls 20b and 20c is 20 mm.

  The upper ends of the side walls 20b and 20c are fixed to the main body plate 10 by welding. Here, the bottom wall 20 a is parallel to the main body plate 10.

  Further, a bolt insertion hole 21 concentric with the aiming hole 11 is formed through the bottom wall 20a.

  The bolt insertion hole 21 is for inserting the anchor bolt B. The inner diameter of the bolt insertion hole 21 is larger than the outer diameter of the anchor bolt B, and the inner diameter of the aiming hole 11 is smaller (smaller diameter). The inner diameter of the bolt insertion hole 21 is 16.5 mm here.

  An anchor bolt B is inserted into the bolt insertion hole 21, and is fastened and fixed from above and below the bolt insertion hole 21 by a pair of nuts N (see FIG. 4).

  The anchor bolt B has an outer diameter of 16 mm here, and is almost the same size as the inner diameter of the bolt insertion hole 21, so that it hardly moves in the bolt insertion hole 21. For this reason, the center of the anchor bolt B is in a state of being substantially coincident with the center of the bolt insertion hole 21 when being inserted and held in the bolt insertion hole 21.

  And the 1st-4th bolt core mark 22a, 22b, 22c, 22d which shows the center of the bolt insertion hole 21 is formed in the bottom wall 20a of the subplate 20 as shown in FIG.

  The first to fourth bolt core marks 22 a to 22 d are marks provided along the directions orthogonal to each other through the center of the bolt insertion hole 21. That is, the line P ′ connecting the first bolt core mark 22a and the third bolt core mark 22c located at the mutually opposed positions, and the first bolt core mark 22a and the fourth bolt core mark 22d located at the mutually opposed positions. A point R ′ at which the connecting line Q ′ intersects becomes the center of the bolt insertion hole 21 (see FIG. 2).

  Each of the bolt core marks 22a to 22d is also formed by forming a linear groove extending a predetermined length from the periphery of the bolt insertion hole 21 in the bottom wall 20a and coloring the inside of the groove.

  The bolt core marks 22a to 22d are provided vertically below the first to fourth plate core marks 12a to 12d, that is, below (directly below) along the vertical direction.

  As a result, the first bolt core mark 22a is formed vertically below the first plate core mark 12a, the first bolt core mark 22a is formed vertically below the first plate core mark 12a, and the third plate core mark 12c A third bolt core mark 22c is formed vertically below, and a fourth bolt core mark 22d is formed vertically below the fourth plate core mark 12d.

  Next, the operation of the positioning device 1 of the present invention will be described.

  In order to install the anchor bolt B at an accurate position using the positioning device 1, first, the ground surface is dug up to a depth that becomes the base bottom surface, and the grounded bottom surface portion is leveled in a substantially horizontal state. Then, a number of reinforcing bars 2 for foundation reinforcement are laid out in a grid pattern on the ground surface that has been leveled, and bound by an annealed iron wire or the like.

  Next, a large number of water yarns i and i ′ are stretched in a grid pattern above the rebar 2 along the horizontal direction. At this time, it sets so that the intersection part of the water thread i and i 'may be located above the installation position of the anchor bolt B.

  Then, a plurality of base members 3 are arranged at appropriate positions according to the installation positions of the anchor bolts B, and are fixed to the reinforcing bars 2 with an annealed iron wire or the like.

  Subsequently, after oil is applied to the surfaces of the plurality of rising members 4, the lower screw grooves 4a are screwed into the nuts 3b of the base members 3, and the rising members 4 are erected. Then, the upper thread groove 4 b of the standing member 4 is screwed into the screw hole of the magnet body 5, and the magnet body 5 is attached.

  Then, the main body plate 10 of the positioning device 1 is placed on the upper surface 5 b of the magnet body 5 attached to the rising member 4.

  At this time, each rising member 4 is rotated and moved in the vertical direction, and the positioning device 1 is adjusted to a horizontal state using a level not shown. That is, the water yarns i and i ′ stretched horizontally in advance and the positioning device 1 are positioned so as to be parallel to each other.

  Further, these rising members 4 are adjusted in height so that the positioning device 1 is positioned above the basic top surface planned line 6.

  Further, in the positioning device 1, an anchor bolt B is inserted into a bolt insertion hole 21 formed in advance in the sub-plate 20 and is fixed by a pair of nuts N. At this time, the anchor bolt B hardly moves in the bolt insertion hole 21, so that the center of the bolt insertion hole 21 and the center of the anchor bolt B are held substantially coincident with each other.

  Hereinafter, a description will be given with reference to FIG.

  In order to accurately aim the positioning device 1 placed on the magnet body 5 with respect to the water threads i and i ′, first, one water thread i stretched upward, the first plate core mark 12a, The position of the positioning device 1 is adjusted by moving horizontally so that the first bolt core mark 22a is positioned on the same line when viewed from above.

  At this time, position adjustment is performed while visually confirming the position of the water thread i or the like from the first zone 101 which is the area outside the aiming hole 11 in the visible area 100.

  Next, the position of the positioning device 1 is horizontally moved so that the water thread i, the first aiming hole core mark 13a, and the first bolt core mark 22a are located on the same straight line when viewed from above. Adjust.

  At this time, position adjustment is performed while visually confirming the position of the water thread i or the like from the second zone 102 which is the area inside the aiming hole 11 in the visible area 100.

  The “visible region” is a region where the first bolt core mark 22a can be seen from above, and can be accurately aimed by looking at the position of the water thread i or the like from within the visible region 100.

  When the positions of the first plate core mark 12a, the first aiming hole core mark 13a, the first bolt core mark 22a, and the water thread i are aligned, the water thread i and the third plate core mark 12c are subsequently aligned. Then, the position of the positioning device 1 is adjusted by moving horizontally so that the third bolt core mark 22c is positioned on the same line when viewed from above.

  At this time, position adjustment is performed while visually confirming the position of the water thread i or the like from the first zone 201 which is the area outside the aiming hole 11 in the visible area 200.

  Next, the position of the positioning device 1 is horizontally moved so that the water thread i, the third aiming hole core mark 13c, and the third bolt core mark 22c are located on the same straight line when viewed from above. Adjust.

  At this time, position adjustment is performed while visually confirming the position of the water thread i or the like from the second zone 202 which is the area inside the aiming hole 11 in the visible area 200.

  And the water thread i 'orthogonal to the water thread i aligned with the first plate core mark 12a, the third plate core mark 12c, etc., the second and fourth plate core marks 12b, 12d, the second, the second The four aiming hole core marks 13b and 13d, the second and fourth bolt core marks 22b and 22d are aligned in the same procedure as described above, and the positioning device 1 and the water threads i and i 'are accurately aimed.

  Thereby, the center of the bolt insertion hole 21 of the positioning device 1 can be aimed at the intersecting portion of the water threads i and i ′ orthogonal to each other, and the positioning device 1 can be placed at an accurate position.

  In this state, the switch 5a of the magnet body 5 is turned, the upper surface 5b of the magnet body 5 is magnetized, and the main body plate 10 is magnetized and fixed.

  And concrete is laid up to the foundation top surface planned line 6, and it hardens sufficiently and forms a concrete foundation. Finally, the rising member 4, the magnet body 5, and the positioning device 1 that protrude from the top surface of the formed concrete foundation (substantially the same as the basic top surface planned line 6) are removed.

  At this time, the positioning device 1 is released from the magnetic attachment by removing the nut N from the anchor bolt B and then turning the switch 5a of the magnet body 5, and can be easily removed.

  Further, since the surface of the rising member 4 is pre-oiled, it can be easily rotated, and the lower thread groove 4a is removed from the nut 3b of the base member 3 and is removed from the placed concrete foundation. Can be removed.

  Thus, the anchor bolt B can be installed at an accurate position using the positioning device 1.

  As described above, the positioning device 1 of the present invention includes the main body plate 10 held above the basic top surface and the sub plate 20 provided in parallel below the main body plate 10. An aiming hole 11 is formed through the plate 10, and aiming core marks 12 a to 12 d and 13 a to 13 d indicating the center of the aiming hole 11 are provided from the upper surface 10 d to the peripheral surface 11 a of the aiming hole 11. 20, a bolt insertion hole 21 that is concentric with the aiming hole 11 and has a small diameter and through which the anchor bolt B is inserted is formed so that bolt core marks 22 a to 22 d that indicate the center of the bolt insertion hole 21 are aimed. It is provided vertically below the core marks 12a to 12d and 13a to 13d.

  As a result, the aiming core marks 12a to 12d, 13a to 13d and the bolt core marks 22a to 22d are aimed at the water threads i and i ', so that the position of the positioning device 1 is accurate with respect to the water threads i and i'. Can be aimed at the position.

  In other words, the plate core marks 12a to 12d, which are the aiming core marks on the upper surface 10a of the main body plate 10 that are horizontal with respect to the water threads i and i ', and the positions that are perpendicular to the water threads i and i'. The aiming hole core marks 13a to 13d, which are aiming core marks on the peripheral surface 11a of the aiming hole 11, are aligned with the water threads i and i 'and the bolt core marks 22a to 22d, respectively. It becomes possible to aim accurately with i ′.

  Further, by aligning the sighting core marks 12a to 12d and 13a to 13d along the two directions of the horizontal direction and the vertical direction with the water yarns i and i ', respectively, Easy and accurate alignment can be performed without looking down from vertically above.

  The plate core marks 12a to 12d, the aiming hole core marks 13a to 13d, and the bolt core marks 22a to 22d are formed by forming grooves of a predetermined length and coloring the grooves. Yes.

  Thereby, it becomes easy to visually confirm each mark, and alignment can be performed more easily.

  As mentioned above, although embodiment concerning this invention has been explained in full detail with drawing, a concrete structure is not restricted to the above-mentioned embodiment. Design changes and the like within the scope not departing from the gist of the present invention are included in the present invention.

  For example, in the above-described embodiment, when the positioning device 1 is placed on the magnet body 5, the level device is held horizontally using a level (not shown). Alternatively, it may be provided on the sub-plate 20.

  Thereby, in order to prevent displacement of the water yarns i and i ′, the main body plate 10 and the sub-plate 20 that must be horizontal to the water yarns i and i ′ can be easily and reliably leveled. Can be retained.

  As a result, the positions of the plate core marks 12a to 12d and the aiming hole core marks 13a to 13d of the main body plate 10 and the bolt core marks 22a to 22d of the sub-plate 20 are accurately matched, thereby improving the positioning accuracy. It becomes possible.

  Furthermore, when this level is made detachable by a magnet or the like, it can be attached at an arbitrary position only when this level is used, and the usability can be further improved.

  In the positioning device 1 described above, the anchor bolt B is raised directly on the foundation base portion having no foundation rising portion. However, the mold K used when the foundation rising portion T is driven (FIG. 5 ( By fixing the main body plate 10 to b), it can be used even on a rising foundation.

  That is, in this case, as shown in FIG. 5A, the main body plate 30 is continuously provided downward from the aiming wall portion 32 in which the aiming hole 31 is formed and from both side portions of the aiming wall portion 32. A pair of interval holding portions 33.

  Further, at the lower end of the gap holding portion 33, a mold engaging portion 34 extending in the opposite direction along the substantially horizontal direction is formed, and a magnet body 35 is attached to the lower side of the mold engaging portion 34. It has been.

  Then, as shown in FIG. 5 (b), after the anchor bolt B is held on the sub-plate 36 provided below the aiming hole 31, the mold engagement portion 34 is connected to the upper ends of the pair of molds K. It is placed on the outer peripheral frame K1.

  Here, the outer peripheral frame K1 extends in the horizontal direction, and is formed of a material to which the magnet body 35 can be magnetically attached.

  Then, the positioning device and the water thread (not shown here) are accurately aimed in the above-described procedure, and the mold body engaging portion 34 is magnetically attached to the outer peripheral frame K1 by the magnet body 35. Accordingly, the anchor bolt B is held at an accurate position, and the foundation rising portion T can be driven by installing the anchor bolt B at an accurate position.

  Furthermore, although the main body plate 10 of the positioning device 1 described above extends in the direction in which both end portions 10a and 10b differ by 90 °, it may extend in a straight line. Further, the number of aiming holes 11 may be set arbitrarily.

It is a perspective view showing an anchor bolt positioning device concerning this invention. It is an enlarged view of the A section in FIG. It is sectional drawing which follows the BB line in FIG. It is an enlarged view of the C section in FIG. (A) is a perspective view which shows the other example of the anchor bolt positioning device in this invention, (b) is sectional drawing which shows the use condition of the anchor bolt positioning device shown to Fig.5 (a).

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Anchor bolt positioning device 10 Main body plate 11 Aiming hole 12a First plate core mark (Main body plate side aiming core mark)
12b Second plate core mark (main body plate side aiming core mark)
12c Third plate core mark (main body plate side aiming core mark)
12d Fourth plate core mark (main body plate side aiming core mark)
13a First aiming hole core mark (sighting hole side aiming core mark)
13b Second aiming hole core mark (sighting hole side aiming core mark)
13c Third aiming hole core mark (sighting hole side aiming core mark)
13d Fourth aiming hole core mark (sighting hole side aiming core mark)
20 Sub-plate 21 Bolt insertion hole 22a First bolt core mark 22b Second bolt core mark 22c Third bolt core mark 22d Fourth bolt core mark

Claims (2)

An anchor bolt positioning device for installing an anchor bolt embedded in a foundation at a predetermined position,
A main body plate held above the basic top surface, and a sub-plate provided in parallel to the lower side of the main body plate,
The body plate has an aiming hole formed therethrough, and an aiming core mark indicating the center of the aiming hole is provided from the upper surface to the peripheral surface of the aiming hole,
The sub plate is formed with a bolt insertion hole that is concentric and small in diameter with the aiming hole and through which the anchor bolt is inserted, and a bolt core mark that indicates the center of the bolt insertion hole is the aiming core mark. An anchor bolt positioning device provided vertically below the anchor bolt.   The anchor bolt positioning device according to claim 1, wherein the main plate or the sub plate is provided with a level.

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