JP5977578B2 - Anchor bolt pull-out test apparatus and test method - Google Patents

Description

  The present invention relates to a pull-out test apparatus and a test method for confirming the attachment strength of an anchor bolt (embedded bolt) attached to an attachment object such as a structure.

  Conventionally, as an anchor bolt pull-out test method, for example, there is a method as described in Patent Document 1, and three or four anchor bolts supporting a pull-out reaction force are provided around an anchor bolt embedded in a floor or the like. There is a known method (pickup method) in which a pedestal is placed, the protruding portion of the anchor bolt from the floor surface is pulled straight up, and the anchor bolt can test whether it can withstand a specified pulling force. See Fig. 11. See Fig. 11 for the reference numerals in Fig. 11).

  As such a pull-up type testing machine, various types have been proposed in which a specified pulling force is applied to an anchor bolt using a hydraulic pump, a testing machine integrated handle, or a spanner, for example. .

  Further, as described in Patent Document 2, there is also known one using a small center hole type load cell (annular load cell having an opening in the center) (see FIG. 12, reference numerals in FIG. 12). (See Patent Document 2).

  After inserting the center opening of the center hole type load cell into the protruding part of the anchor bolt, this adapter screwed the adapter nut from the tip of the protruding part of the anchor bolt, and the center hole type load cell was fixed to the floor surface and the adapter nut. The anchor bolt can withstand the specified pull-out force while confirming the stress (pull-out force for the anchor bolt) detected by the load cell. .

Japanese Patent Laid-Open No. 10-185769 Utility Model Registration No. 3146805

  However, in the case of a pull-up type apparatus (see FIG. 11) as described in Patent Document 1, a steel material for equipment foundation (so-called H) on which equipment (for example, a water storage tank installed on a rooftop) is placed. If you want to perform a pull-out test of an existing anchor bolt that is secured to a floor surface such as concrete (such as a shape steel or C-section steel) (for example, if you want to perform an inspection for seismic strength, etc.) There is a situation that a steel material for equipment foundation (so-called H-shaped steel, C-shaped steel, etc.) becomes an obstacle and a pull-out test apparatus cannot be installed.

  For this reason, in the case of a pull-up type apparatus as described in Patent Document 1, in order to be able to install a pull-out test apparatus, equipment equipment and equipment foundation steel (so-called H-section steel) , C-shaped steel, etc.) once removed, after performing a pull-out test, it is necessary to perform a troublesome and time-consuming work such as installing it again, and the cost required for the pull-out test increases and the working time becomes very long. There is.

  Further, in the case of a pull-out test apparatus using a center hole type load cell as described in Patent Document 2 (see FIG. 12), when the floor surface is inclined, the center hole type load cell is per side. However, since it is difficult to correct this, there is a possibility that an accurate extraction force cannot be detected and an accurate extraction test cannot be performed.

  Further, in the case of a pull-out test apparatus using a center hole type load cell as described in Patent Document 2, there is a risk that it is difficult to measure the amount of displacement.

  When installing a pull-out test device using a center hole type load cell as described in Patent Document 2, completely remove the fastening nut and washer from the anchor bolt and insert the center hole type load cell into the anchor bolt. After that, the center hole type load cell is tightened with an adapter nut and a pull-out test is performed. After the test is completed, the adapter nut is removed, the center hole type load cell is removed from the anchor bolt, and the fastening nut and washer are attached and tightened. The actual situation is that a lot of work is required and the work time required for the pull-out test becomes long.

  The present invention has been made in view of such circumstances, and has a simple and low-cost configuration.For example, from the viewpoint of ensuring seismic strength, the pull-out strength of an anchor bolt installed in a structure can be easily and accurately. It is an object of the present invention to provide a pull-out test apparatus and method that can be examined.

For this reason, the anchor bolt pull-out test device according to the present invention is
An anchor bolt pull-out test apparatus having a base end attached to an attachment object,
There is an anchor bolt insertion notch that is larger than the diameter of the anchor bolt and screwed into the anchor bolt or smaller than the lower surface width of the washer, and while the anchor bolt is inserted into the anchor bolt insertion notch from the side, the nut or An anchor bolt engagement board inserted from a lateral direction into a gap existing below the washer;
A wall having an opening accessible to the nut and connected to the anchor bolt engagement substrate and extending toward the tip end side of the anchor bolt along the axial direction of the anchor bolt ;
A top plate portion connected to the distal end of the anchor bolt of the wall and extending on both sides across the anchor bolt;
A bolt set jig comprising:
An output piston is provided corresponding to each of the top plate portions extending on both sides of the anchor bolt and disposed between the hydraulic cylinder support substrate and the top plate portion and lifted by the action of hydraulic pressure. a hydraulic unit configured to include a pair of hydraulic Cylinders were,
It is characterized by providing.

  In the present invention, the hydraulic cylinder support substrate is a through-bolt screwed to the hydraulic cylinder support substrate, and the amount of protrusion from the lower surface of the hydraulic cylinder support substrate is adjusted to thereby adjust the hydraulic cylinder support substrate. An inclination correction bolt capable of correcting the inclination is provided.

In the present invention,
The anchor bolt is inserted into the through hole of the lower member of the H-shaped steel or C-shaped steel,
The tilting bolt may be provided at a position protruding from the lower member .

In the present invention,
It is characterized in that it includes a bracing-preventing tensioning element that is attached to the hydraulic cylinder support substrate and prevents the blurring by pressing against the lower surface of the upper member of the H-shaped steel or C-shaped steel .

  According to the present invention, a pull-out test apparatus that can easily and accurately check the pull-out strength of an anchor bolt installed in a structure from the viewpoint of ensuring seismic strength, for example, while having a simple and low-cost configuration. And methods can be provided.

1 is a front view showing an example of an overall configuration of a bolt pull-out test apparatus according to an embodiment of the present invention. It is an upper surface of FIG. It is a left view of FIG. It is a figure for explaining an example of the installation method (test method) of the bolt pull-out test apparatus according to the same embodiment as above (step 1: a diagram showing a state before the bolt setting jig is set), (A) is Front view, (B) is a top view, and (C) is a left side view. It is a figure for explaining an example of the installation method (test method) of the bolt pull-out test apparatus according to the same embodiment as above (step 2: a diagram showing a state of setting a bolt setting jig), (A) is a front view (B) is a top view and (C) is a left side view. It is a figure (steps 3-6: the figure which shows the mode of the setting of a hydraulic unit) for demonstrating an example of the installation method (test method) of the bolt pull-out test apparatus which concerns on embodiment same as the above, (A) is a front view (B) is a top view and (C) is a left side view. It is a figure (step 8: the figure which shows the mode of supply of the hydraulic pressure to a hydraulic unit) for demonstrating an example of the installation method (test method) of the bolt pull-out test apparatus which concerns on embodiment same as the above, (A) is Front view, (B) is a top view, and (C) is a left side view. In the bolt pull-out test apparatus according to the embodiment described above, an example of an installation method (test method) in the case where the hydraulic cylinder support substrate (reaction table) protrudes from the end of the lower member of the H-section steel 3 will be described. (A) is a front view, (B) is a top view, and (C) is a left side view. In the bolt pull-out test apparatus according to the same embodiment, it is a diagram showing an example when applied to a hanging anchor bolt 1A that is attached to a ceiling or the like and supports a load, (A) is a front view, (B) is a bottom view and (C) is a right side view. It is a figure which shows an example at the time of the bolt pull-out test apparatus which concerns on embodiment same as the above, when three hydraulic type single acting cylinders are arrange | positioned around an anchor bolt, (A) is a front view, (B) is an upper surface. (C) is a rear view, (D) is a right side view of (C). It is a figure for demonstrating the pull-out test apparatus (method) of the anchor bolt described in the conventional patent document 1. FIG. It is a figure for demonstrating the pull-out test apparatus (method) of the anchor bolt described in the conventional patent document 2. FIG.

  DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, an embodiment of the invention will be described with reference to the accompanying drawings. The present invention is not limited to the embodiments described below.

  A pull-out test apparatus 100 for bolts such as anchor bolts according to an embodiment of the present invention includes a bolt set jig 110.

  As shown in FIGS. 1 to 3, the bolt set jig 110 according to the present embodiment is arranged in a lateral direction (in an anchor bolt 1 penetrating an H-section steel 3 installed on a floor surface such as a rooftop or other structure 4 ( 2 and the anchor bolt engaging substrate 101 installed by inserting the U-shaped notch 101A from the Y direction in FIG. 3 and the longitudinal direction of the anchor bolt 1 on both sides of the anchor bolt 1. A side wall 102 extending from the anchor bolt engaging substrate 101, and a window (opening) 103A for connecting to the side wall 102 and the anchor bolt engaging substrate 101 and accessing the anchor bolt 1 are provided. And a top plate connected to the front wall 103 and the side wall portion 102 and extending on both sides (lateral direction (longitudinal direction of the H-section steel 3)) with the anchor bolt 1 interposed therebetween Part 104 , It is configured to include a.

  The U-shaped notch 101A according to the present embodiment corresponds to an example of an anchor bolt insertion notch according to the present invention, the front wall 103 corresponds to an example of a wall according to the present invention, and a window (opening). 103A corresponds to an example of the opening according to the present invention.

  The anchor bolt 1 has a base end side embedded in a floor surface, ceiling, or other structure 4 and attached thereto, and a lower member 3A of an H-section steel 3 which is a steel material for equipment foundation on which equipment and the like are placed. And is used to fasten and fix the H-shaped steel 3 to the floor surface, ceiling, or other structure 4 with a nut 2 or a washer or the like. Here, the floor surface, ceiling, and other structures 4 correspond to an example of an anchor bolt attachment target according to the present invention.

  The bolt setting jig 110 loosens the nut 2 to create a gap below the lower surface of the nut 2, and slides the anchor bolt 1 through the U-shaped notch 101A while inserting the anchor bolt 1 into the gap. The combined board 101 is inserted, and the anchor bolt engaging board 101 and then the bolt setting jig 110 are set at predetermined positions (positions in FIGS. 1, 2 and 3).

  Then, after setting the anchor bolt engaging board 101 and the bolt setting jig 110 at a predetermined position, the nut 2 is tightened to fix the anchor bolt engaging board 101 and the bolt setting jig 110 to the anchor bolt 1 to the upper side of FIG. The anchor bolt 1 is engaged by restricting the relative movement.

  That is, the notch width of the U-shaped notch 101A is larger than the diameter of the anchor bolt 1 and smaller than the nut lower surface or the washer width (width in a direction substantially perpendicular to the axial direction of the anchor bolt 1). ing.

  Thus, since the anchor bolt 1 is inserted into the U-shaped notch 101A, as shown in FIG. 2, the U-shaped notch 101A is arranged so that the opening faces the anchor bolt 1, The two side wall portions 102 are disposed along the longitudinal direction of the H-section steel 3, and the top plate portion 104 is configured to extend along the longitudinal direction of the H-section steel 3.

The bolt pull-out test apparatus 100 according to the present embodiment is provided with a pair of left and right hydraulic single-acting cylinders 200 (200A, 200B) that generate a hydraulic pressure for applying a pulling force to the anchor bolt 1. Yes.
The pair of hydraulic single acting cylinders 200 (200A, 200B) corresponds to the pair of hydraulic cylinders according to the present invention.

  As shown in FIGS. 1 and 2, the pair of left and right hydraulic single-acting cylinders 200 </ b> A and 200 </ b> B are arranged at predetermined intervals along the longitudinal direction of the H-section steel 3 so as to be disposed on both sides with the anchor bolt 1 interposed therebetween. It is arranged.

  The hydraulic single-acting cylinder 200 (200A, 200B), as shown in FIGS. 1 and 3, respectively, is substantially U-shaped in the plane of FIG. The hydraulic cylinder support substrate (reaction table) 202 is placed between the upper surface of the lower member 3A of the H-shaped steel 3 and the lower surface of the top plate portion 104. ing.

  As shown in FIGS. 2 and 3, the hydraulic single-acting cylinders 200A and 200B are connected to the hydraulic distributor 220 via the hydraulic supply passages 210A and 210B. The hydraulic distributor 220 is connected to the hydraulic distributor 220 via a connector 230. Thus, oil adjusted to a predetermined hydraulic pressure is supplied from a hydraulic pump (not shown).

  Further, in the bolt pull-out test apparatus 100 according to the present embodiment, the output pistons 201A and 201B of the hydraulic single-acting cylinders 200A and 200B are raised in response to the hydraulic pressure supply. The plate portion 104 is pushed up. At this time, the right and left output pistons 201A and 201B can push up the top plate portion 104 smoothly so that the anti-shake tension element 400 (400A, 400A, 400B) is provided outside the corresponding hydraulic single-acting cylinder 200 (200A, 200B).

  The lower member 401 (401A, 401B) of the anti-shake tension element 400 (400A, 400B) is a hydraulic cylinder support substrate (reaction table) on which the hydraulic single-acting cylinder 200 (200A, 200B) is placed and supported. ) 202, while the upper member 402 (402A, 402B) is screwed to the lower member 401 (401A, 401B), the upper member 402 (402A, 402B) is connected to the lower member 401 (401A). , 401B), the upper member 402 (402A, 402B) is configured to be vertically extendable (can be raised and lowered) in FIGS.

  Note that the upper end portion of the upper member 402 (402A, 402B) can be configured to be supported by a spherical bearing or the like so as to absorb some inclination.

  Then, by extending the upper member 402 (402A, 402B), the upper surface of the upper member 402 (402A, 402B) is pressed against the lower surface of the upper member 3B of the H-section steel 3 in a predetermined manner, so that The floating of the hydraulic cylinder support substrate (reaction table) 202 is suppressed, thereby suppressing vibration vibration during pressurization and the like, and the output pistons 201A and 201B smoothly push up the top plate portion 104 to the anchor bolt 1. A predetermined pulling force (tensile force) can be applied to the anchor bolt 1 through the U-shaped notch 101 </ b> A engaged through the nut 2.

  The hydraulic cylinder support substrate (reaction force table) 202 is for supporting the reaction force of the load acting on the bolt setting jig 110 and the anchor bolt 1 during pressurization, and is installed on the H-section steel 3. As shown in FIG. 3, the hydraulic cylinder is connected to the R portion (curved edge) of the connecting portion between the lower member (flange) 3A of the H-shaped steel 3 and the central member (web) 3C, as shown in FIG. The cutout portion 202A can be provided so that the front end portion (left end portion in FIG. 3) of the support substrate (reaction table) 202 in the insertion direction does not interfere.

  Further, when the hydraulic cylinder support substrate (reaction table) 202 cannot be installed horizontally, the top plate portion 104 is placed with the output pistons 201A and 201B of the hydraulic single-acting cylinders 200A and 200B tilted. In the present embodiment, the hydraulic cylinder support substrate (reaction force table) is likely to be pushed up obliquely, so that an accurate pulling force cannot be applied to the anchor bolt 1 and there is a risk that safety aspects such as dropout may be impaired. ) A tilt correcting bolt 500 for horizontally installing 202 is provided.

  As shown in FIG. 2, the inclination correction bolts 500 (500A to 500D) according to the present embodiment have inclination correction bolt mounting through holes 202a to 202d provided in the hydraulic cylinder support substrate (reaction table) 202. To be combined.

  Then, by rotating the inclination correction bolts 500 (500A to 500D) assembled in the inclination correction bolt mounting through holes 202a to 202d relative to the hydraulic cylinder support substrate (reaction table) 202, The amount of protrusion from the lower surface of the hydraulic cylinder support substrate (reaction table) 202 at the lower end of the inclination correction bolt 500 (500A to 500D) (the amount of protrusion in the vertical direction in FIGS. 1 and 3) can be adjusted. . In FIG. 3, the tilt correction bolt 500A is not shown.

  Therefore, even if the upper surface of the lower member (flange) 3A of the H-section steel 3 is inclined in the planes of FIGS. 1 and 3, the hydraulic pressure of the inclination correcting bolt 500 (500A to 500D). The hydraulic cylinder support substrate (reaction table) 202 can be installed substantially horizontally by correcting the inclination by appropriately adjusting the amount of protrusion from the lower surface of the cylinder support substrate (reaction table) 202.

  Even when the upper surface of the structure 4 is inclined or uneven, the amount of protrusion of the inclination correction bolt 500 (500A to 500D) from the lower surface of the hydraulic cylinder support substrate (reaction table) 202 is increased. By adjusting the above, the hydraulic cylinder support substrate (reaction force table) 202 can be installed substantially horizontally by absorbing such a step due to the inclination or unevenness.

  The bolt pull-out test apparatus 100 according to the present embodiment having such a configuration is used for a pull-out test of an anchor bolt or the like by the following procedure.

  In step 1, first, the nut 2 (see FIG. 4) that is screwed to the anchor bolt 1 to fasten and fix the H-shaped steel 3 is loosened.

  In step 2, the anchor bolt engaging substrate 101 is inserted into the gap between the loosened lower surface of the nut 2 and the upper surface of the lower member 3A of the H-shaped steel 3 while inserting the anchor bolt 1 into the U-shaped notch 101A. Slide and insert, and set the bolt setting jig 110 at a predetermined position (the position shown in FIGS. 2 and 3) (see FIG. 5).

  In step 3, the nut 2 is manually tightened using a spanner or the like through a window 103A (see FIG. 5A) opened in the front wall 103 of the bolt setting jig 110, and the bolt setting jig 110 is anchored. Engage with the bolt 1.

  In step 4, the hydraulic single-acting cylinder 200 (200A, 200B), the hydraulic pressure supply passage 210 (210A, 210B), the hydraulic distributor 220, the connector 230, and the hydraulic cylinder support board (reaction table) 202 (202A). , 202B), the hydraulic unit 300 in which the anti-shake tension element 400 (400A, 400B) and the inclination correcting bolt 500 (500A to 500D) are integrated into the bolt set jig 110 set in step 3 In addition, it is installed at a predetermined position (the position shown in FIGS. 1 to 3) (see FIG. 6).

  That is, the anti-shake tension element 400 (400A) so that the output pistons 201A, 201B of the hydraulic single-acting cylinder 200 (200A, 200B) can push up the top plate 104 reliably and substantially vertically. 400B) and the tilt correction bolt 500 (500A to 500D), while adjusting the expansion / contraction amount, is set at a predetermined position (position shown in FIGS. 1 to 3) as shown in FIG.

In addition, by setting to such a predetermined position (position of FIGS. 1-3), as shown in FIG. 3, the center of the nominal diameter of the anchor bolt 1 and the length of the H-section steel 3 are automatically set. The hydraulic single-acting cylinders 200A and 200B can be arranged on the same straight line in the direction and symmetrical (laterally symmetric) on both sides with the anchor bolt 1 interposed therebetween, and the anti-shake tension elements 400A and 400B are arranged. can do.
Thereby, since it is possible to apply a tensile force to the anchor bolt 1 stably and accurately, it is possible to realize a pull-out test with high safety and reliability.

  In step 5, the upper member 402 (402A, 402B) of the anti-shake tension element 400 (400A, 400B) is extended upward in FIG. 3 (see FIGS. 6A and 6C), and the upper member The upper surface of 402 (402A, 402B) is pressed against the lower surface of the upper member 3B of the H-section steel 3. This prevents the hydraulic unit 300 from shaking during pressurization.

  It should be noted that the pressing by the anti-shake tension element 400 (400A, 400B) in step 5 is performed when the upper member 402 (402A, 402B) is flat and cannot receive a load in the upper part of FIG. If is not necessary, it can be omitted.

  In step 6, the amount of expansion / contraction of the tilt correction bolt 500 (500A to 500D) (the amount of protrusion from the lower surface of the hydraulic cylinder support substrate (reaction table) 202 (202A, 202B)) is adjusted, and the hydraulic cylinder support substrate ( (Reaction force table) 202 (202A, 202B) and the bolt set jig 110 are secured substantially horizontally (see FIGS. 1 and 3).

  When the hydraulic cylinder support substrate (reaction table) 202 (202A, 202B) and the bolt set jig 110 can be secured substantially horizontally, step 6 can be omitted.

  In step 7, an oil supply hose from a hydraulic pump (not shown) is connected to the connector 230 of the hydraulic distributor 220.

  In step 8, the hydraulic pump is driven manually or electrically, and the hydraulic pressure (or the tensile force generated in the anchor bolt 1 by a strain gauge or the like attached to the anchor bolt 1) is confirmed with a hydraulic meter. As shown in FIG. 7, the output pistons 201A and 201B of the hydraulic single-acting cylinder 200 (200A and 200B) are raised via the hydraulic distributor 220 and the hydraulic pressure supply passage 210 (210A and 210B) to 104 and then the bolt set jig 110 is pushed up, and the anchor bolt 1 is fixed to the anchor bolt 1 through the U-shaped notch 101A of the anchor bolt engaging substrate 101 engaged with the nut 2 engaged with the anchor bolt 1. A pulling force is applied to test whether the anchor bolt 1 can withstand an allowable pulling load.

  As described above, according to the bolt pull-out test apparatus 100 according to the present embodiment, it is installed without interfering with the steel for equipment foundation (so-called H-shaped steel, C-shaped steel, etc.) fixed by the anchor bolt 1. Therefore, even if the equipment (for example, a water storage tank installed on the rooftop) is placed, the pull-out test of the anchor bolt 1 can be performed.

  Therefore, according to the bolt pull-out test apparatus 100 according to the present embodiment, in order to perform a pull-out test of the anchor bolt 1, as in the case of a pull-up apparatus as described in Patent Document 1, It is possible to omit troublesome and time-consuming work of once removing equipment equipment and equipment foundation steel materials (so-called H-shaped steel, C-shaped steel, etc.), performing a pull-out test, and then installing them again. The cost required for the pull-out test can be reduced and the working time can be shortened.

  In addition, according to the bolt pull-out test apparatus 100 according to the present embodiment, since the tilt correction bolt 500 (500A to 500D) is provided, a center hole type load cell as described in Patent Document 2 is provided. If the floor surface is inclined as in the case of the pull-out test device used, the center hole type load cell will hit one side, but it is difficult to correct this. It is possible to avoid the possibility that the detection cannot be performed and an accurate pull-out test cannot be performed.

  Moreover, according to the bolt pull-out test apparatus 100 according to the present embodiment, when installing a pull-out test apparatus using a center hole type load cell as described in Patent Document 2, a fastening nut and Once the washer is completely removed and the center hole type load cell is inserted into the anchor bolt, the center hole type load cell is tightened with an adapter nut to perform a pull-out test.After the test is completed, the adapter nut is removed and the center hole type load cell is removed. The troublesome work of removing from the anchor bolt and attaching and tightening the fastening nut and washer can be omitted, and the working time required for the pull-out test can be shortened.

  Further, in the case of a pull-out test apparatus using a center hole type load cell as described in Patent Document 2, it is difficult to measure the amount of displacement, but in this embodiment, by installing a position sensor or the like, The displacement (extraction amount) of the anchor bolt 1 can be easily measured.

  As described above, according to the bolt pull-out test apparatus 100 according to the present embodiment, the anchor bolt installed in the structure from the viewpoint of ensuring seismic strength, for example, while having a simple and low-cost configuration. It is possible to provide a pull-out test apparatus and method that can easily and accurately check the pull-out strength of the pull-out.

  By the way, as shown in FIG. 8, when the hydraulic cylinder support board (reaction table) 202 of the bolt pull-out test apparatus 100 according to the present embodiment protrudes from the end of the lower member 3A of the H-section steel 3. Even with (see FIG. 8A), since the tilt correction bolt 500 is provided, the protruding portion of the hydraulic cylinder support substrate (reaction table) 202 is supported by the tilt correction bolt 500. Since the bolt set jig 110 can be secured in a substantially horizontal and stable manner, a safe and highly accurate pull-out test can be performed.

  In the present embodiment, the pull-out test of the anchor bolt 1 (embedded) mounted (embedded) on a floor surface (structure 4) such as the roof of a building by a method other than the above has been representatively described. The invention is not limited to this. For example, as shown in FIG. 9, even if it is a hanging anchor bolt 1A embedded in a ceiling or the like to support a load, the pull-out test according to the present invention is performed. The pull-out test can be performed using the apparatus and the test method.

In this way, when applied to a hanging anchor bolt 1A that is attached to a ceiling or the like and supports a load, as shown in FIG. 9, the lower end side of the hanging anchor bolt 1A has a top plate portion 104 attached thereto. When the bolt set jig 110 is set at a predetermined position, the hanging anchor bolt 1A is inserted into the U-shaped notch 101A of the anchor bolt engagement board 101 and simultaneously the top plate 104 It can be set as the structure inserted in 104 A of provided U-shaped notch parts.
As a result, even when the hanging anchor bolt 1 </ b> A extends long downward, it does not interfere with the top plate portion 104, so that a pull-out test can be performed.

  In addition, regarding the anchor bolt 1 protruding from the floor surface as shown in FIGS. 1 to 3, for example, even when the anchor bolt 1 extends long upward, the top plate portion 104 is similarly formed. By providing the U-shaped cutout portion 104A in the upper portion, the extension portion of the anchor bolt 1 to the upper side does not interfere with the top plate portion 104, so that a pull-out test can be performed.

  In the present embodiment, as shown in FIGS. 1 and 2, etc., a case has been described in which a pair of hydraulic single-acting cylinders 200A and 200B are arranged on both sides with the anchor bolt 1 interposed therebetween. The present invention is not limited to this, and three hydraulic single-acting cylinders 200A, 200B, and 200C may be arranged around the anchor bolt 1 as shown in FIG.

In this case, the top plate portion 104 ′ of the bolt set jig 110 ′ has a semicircular shape (otherwise, the bolt set jig 110 ′ may have the same configuration as the bolt set jig 110 of FIG. The hydraulic unit 300 ′ distributes hydraulic pressure to the three hydraulic single-acting cylinders 200A, 200B, 200C and the three hydraulic single-acting cylinders 200A, 200B, 200C that push up the semicircular top plate 104 ′. It can be configured with a dispensing device 220 ′ that can.
By adopting such a configuration, for example, it is possible to apply a larger pulling force to the anchor bolt 1.

  In addition, the anchor bolt engagement board | substrate 101, the side wall part 102, the front wall 103, and the top-plate part 104 which comprise the volt | bolt set jig 110 which concerns on this Embodiment are in order to obtain predetermined intensity | strength, for example, heat-treated steel etc. Can be used. For example, it is assumed as an example that pre-hardened steel or the like is used.

  The embodiment according to the present invention described above is merely an example for explaining the present invention, and various modifications can be made without departing from the gist of the present invention.

DESCRIPTION OF SYMBOLS 1 Anchor bolt 1A Hanging anchor bolt 2 Nut 3 H-section steel 4 Structure (an example of the attachment target object based on this invention)
101 anchor bolt engagement substrate 101A U-shaped notch (corresponding to an example of an anchor bolt insertion notch according to the present invention)
102 Side wall portion 103 Front wall (corresponding to an example of a wall according to the present invention)
103A window (corresponding to an example of an opening according to the present invention)
104 Top plate portion 104A U-shaped notch portion 110 Bolt setting jig 200 Hydraulic single acting cylinder 202 Hydraulic cylinder support substrate (reaction table)
202 A Notch 220 Hydraulic Distributor 230 Connector 400 Anti-shake Tensile Element 500 Bolt for Inclination Correction

Claims (4)

An anchor bolt pull-out test apparatus having a base end attached to an attachment object,
There is an anchor bolt insertion notch that is larger than the diameter of the anchor bolt and screwed into the anchor bolt or smaller than the lower surface width of the washer, and while the anchor bolt is inserted into the anchor bolt insertion notch from the side, the nut or An anchor bolt engagement board inserted from a lateral direction into a gap existing below the washer;
A wall having an opening accessible to the nut and connected to the anchor bolt engagement substrate and extending toward the tip end side of the anchor bolt along the axial direction of the anchor bolt ;
A top plate portion connected to the distal end of the anchor bolt of the wall and extending on both sides across the anchor bolt;
A bolt set jig comprising:
An output piston is provided corresponding to each of the top plate portions extending on both sides of the anchor bolt and disposed between the hydraulic cylinder support substrate and the top plate portion and lifted by the action of hydraulic pressure. a hydraulic unit configured to include a pair of hydraulic Cylinders were,
An anchor bolt pull-out test apparatus comprising:   The hydraulic cylinder support board is a through-bolt screwed to the hydraulic cylinder support board, and the inclination of the hydraulic cylinder support board is corrected by adjusting the amount of protrusion from the lower surface of the hydraulic cylinder support board. The anchor bolt pull-out test device according to claim 1, further comprising an inclination correction bolt that can be used. The anchor bolt is inserted into the through hole of the lower member of the H-shaped steel or C-shaped steel,
The anchor bolt pull-out test apparatus according to claim 1 or 2, wherein the tilting bolt is provided at a position protruding from the lower member . 4. The anti-vibration tension element that is attached to the hydraulic cylinder support substrate and prevents the anti-vibration by being pressed against the lower surface of the upper member of the H-shaped steel or C-shaped steel. Anchor bolt pull-out test device as described .

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