Anchor bolt measuring jig

Abstract

To provide a measuring jig used to inspect the position and inclination of anchor bolts. [Solution] The measurement jig is formed in a cap shape (cylindrical shape). The measurement jig has a measurement target and a screw hole 2. The measurement target is, for example, a circular sticker, and the back side of the sticker is affixed to a target affixing part 3. The target affixing part 3 is a recess of the same dimensions as the measurement target 1, formed so that its center point 4 coincides with the center line A of the measurement jig tube. By affixing the center point 5 of the measurement target to the target affixing part 3, it is also positioned so that it coincides with the center line A of the measurement jig tube.

Description

[Technical Field]

[0001] The present invention relates to a measuring jig used to inspect the position and inclination of anchor bolts fixed to concrete structures such as bridge abutments and piers. In particular, the present invention relates to an anchor bolt measuring jig that can easily measure the center position of an anchor bolt and has an unlimited number of measurement points. [Background technology]

[0002] When anchor bolts are fixed into a concrete structure, they are usually designed to be spaced at regular intervals both vertically and horizontally, but when the anchor holes are actually drilled, the placement can be off depending on the position of the rebar in the concrete. In order to manufacture parts such as brackets that match the position of these anchor holes, it is necessary to accurately measure the position of the anchor bolts after drilling and installation. Furthermore, if the anchor is installed at a greater angle than expected, it is necessary to adjust the size of the hole on the bracket side, so it is also necessary to measure the angle of the anchor bolt.

[0003] Traditionally, measurements have been taken using measuring instruments such as steel tape or transits, or when manufacturing parts to fit existing anchor hole arrangements, measurements have been taken by tracing the actual dimensions of a large piece of paper or film placed over the actual object.In recent years, photogrammetry has come into use, which allows for more precise measurements and aims to reduce the amount of on-site surveying work. In a concrete structure, measurement targets are attached to the tip surfaces of multiple anchor bolts, and the measurement targets of each anchor bolt are photographed using a digital camera or the like, and the position of each anchor bolt is analyzed from image data of the photographed measurement targets.

[0004] However, it is difficult to position the measurement target on the axial center line of the anchor bolt, and there is a risk that the position and inclination of the anchor bolt cannot be measured with high accuracy.

[0005] For this reason, a jig has been devised that has a screw hole on one side that can be screwed onto an anchor bolt and on the other side that can abut a measurement target plate onto the central axis of the anchor bolt with a permanent magnet (see Patent Document 1).

[0006] Also, a method has been devised for calculating the inclination of an anchor bolt from the angle of a flat plate obtained from a measurement target on the flat plate (see Patent Document 2). [Prior art documents] [Patent documents]

[0007] [Patent Document 1] Publication No. 3219614 [Patent Document 2] Patent No. 5492343 Summary of the Invention [Problem to be solved by the invention]

[0008] However, when using a permanent magnet to attach and detach the measurement target, in outdoor environments such as on bridges where measurements are actually performed, iron filings and powder adhere to the permanent magnet, making it difficult to accurately abut the target plate on the central axis of the anchor bolt. In addition, the tilt of the measurement target plate is greatly influenced by the shape of the threads of the anchor bolt and the jig, so the accuracy of determining whether the anchor is tilted significantly could only be expected. Furthermore, the method of assigning tilt and drawing information to a measurement target plate has a limited number of targets, making it impossible to measure at once when there are a large number of anchor bolts, when measuring the anchor bolts of two or more adjacent brackets simultaneously, or when there are many measurement points such as reference point targets for checking the bracket position or interference with girders or superstructures.

[0009] The present invention aims to provide a measurement jig that can calculate the center of an anchor bolt and the inclination of an anchor by arranging measurement targets on the axial center line of the anchor bolt, with no limit to the number of measurement points, and by utilizing a jig that can calculate the center of the anchor. [Means for solving the problem]

[0010] In order to solve the above problems, the present invention comprises the following means. That is, 1) A measuring jig used to inspect the position and inclination of an anchor bolt that is fixed to a concrete structure and is arranged with its screw tip protruding from the concrete structure, characterized in that the measuring jig is formed in a cap shape (cylindrical shape) and has a screw hole that opens on one end face of the cylinder and is formed concentrically with the center line of the cylinder, and a measurement target is provided on the other end face of the cylinder, and the jig is attached to the anchor bolt by screwing into the screw hole from the end face side of the cylinder that opens to the screw tip, the jig is arranged concentrically with the anchor bolt, and the center point of the measurement target is arranged to coincide with the center line of the jig. 2) A measuring jig used to inspect the position and inclination of an anchor bolt that is fixed to a concrete structure and is positioned with its screw tip protruding from the concrete structure, characterized in that it is formed, for example, in a disk shape and has a screw hole that passes through the center of the disk and is formed concentrically with the center line of the disk, and a measurement target is provided on one surface on a circle that is concentric with the center line of the disk, and the screw tip is attached to the anchor bolt by screwing into the screw hole so that the measurement target faces the screw tip, the jig is positioned concentrically with the anchor bolt, and the center point of the measurement target is positioned on a circle that is concentric with the center line of the jig. 3) A measurement method for inspecting the position and inclination of an anchor bolt that is fixed to a concrete structure and disposed with its screw tip protruding from the concrete structure, comprising an installation operation of installing a measurement target on the screw tip, a photography operation of acquiring a photographic image including the measurement target, and a coordinate acquisition operation of acquiring coordinates of the measurement point based on the photographic image, wherein the measurement target is arranged by a measurement jig with its center point concentric with the anchor bolt, on the center line of the anchor bolt tip, and on a circle concentric with the anchor bolt, and the position and inclination of the anchor bolt are inspected from the coordinate of the measurement point on the center line of the anchor bolt tip and the coordinate of the center of a circle obtained from a point on the circle concentric with the anchor bolt. [Effects of the Invention]

[0011] According to the present invention, by screwing the guide part of a cap-type jig (tip jig) onto the tip of the anchor bolt, it is arranged concentrically with the anchor bolt, and at the same time, the measurement target on the back surface can be arranged on the axial center of the anchor bolt. Also, by screwing a jig (base jig) with a circular or semicircular screw hole into the anchor bolt near the concrete structure, the target can be arranged on a circle centered on the anchor bolt. [Brief explanation of the drawings]

[0012] [Figure 1] FIG. 2 is a perspective view of a tip jig applied to the embodiment. [Figure 2] FIG. 2 is a side view of a tip jig applied to the embodiment. [Figure 3] FIG. 2 is a top view of a tip jig applied to the embodiment. [Figure 4] FIG. 10 is a bottom view of the tip jig applied to the embodiment. [Figure 5] 4 is a cross-sectional view taken along the line AA in FIG. 3. [Figure 6] FIG. 2 is a perspective view of a base jig applied to the embodiment. [Figure 7] FIG. 10 is a side view of a base jig applied to the embodiment. [Figure 8] FIG. 10 is a top view of a base jig applied to the embodiment. [Figure 9] FIG. 10 is a bottom view of a base jig applied to the embodiment. [Figure 10] 9 is a cross-sectional view of FIG. 8 taken along line B-B. [Figure 11] FIG. 1 is a front view showing a concrete structure, drilled holes, and anchor bolts. [Figure 12] 12 is a cross-sectional view taken along CC in FIG. 11. [Figure 13] This is a diagram showing the tip jig and base jig attached to the anchor bolt. [Figure 14] FIG. 14 is a cross-sectional view taken along the line DD in FIG. 13. DETAILED DESCRIPTION OF THE INVENTION

[0013] A preferred embodiment for obtaining the anchor measurement jig according to the present invention will be described below. This is a jig used to measure the position and inclination of an anchor bolt that is fixed to a concrete structure and is positioned with its screw tip protruding from the concrete structure, and is characterized by comprising: a cap-shaped cylindrical jig having a screw hole that opens into one end face of the cylinder and is formed concentrically with the center line of the cylinder; the anchor tip is attached to the anchor bolt by screwing it into the screw hole from one end face of the cylinder; and a guide part that is positioned concentrically with the anchor bolt; and a measurement target affixed to the back surface of the guide part on the center line of the cylinder. The measurement jig also has a circular or semicircular screw hole in the center, and a measurement target is attached concentrically to the hole.

[0014] 1 to 5 show a measuring jig X1 for a tip jig according to this embodiment, and FIGS. 6 to 10 show a measuring jig X2 for a base jig.

[0015] 11 to 14, measuring jigs X1 and X2 are used to inspect (inspect) the position and inclination of anchor bolts Z fixed to concrete structures Y such as bridge abutments and piers.

[0016] 1 to 5, the measurement jig X1 is formed in a cap shape (cylindrical shape). The measurement jig X1 has a measurement target 1 and a screw hole 2.

[0017] 1 to 5, the measurement target 1 is, for example, a circular sticker, and the back side of the sticker is affixed to the target affixing portion 3. The target affixing portion 3 is a recess of the same dimensions as the measurement target 1, formed so that its center point 4 coincides with the center line A of the measurement jig X1 cylinder. By affixing the center point 5 of the measurement target 1 to the target affixing portion 3, it is also positioned so that it coincides with the center line A of the measurement jig X1 cylinder.

[0018] The screw hole 2 is opened and formed in one of the cylindrical end faces 6 in the direction B of the cylindrical center line A of the measuring jig X1. The screw hole 2 is formed concentrically with the measuring jig X1, with the screw hole center line C coinciding (positioned) with the cylindrical center line A of the measuring jig X1.

[0019] 6 to 10, the measurement jig X2 is formed in, for example, a disk shape. The measurement jig X2 has a measurement target 7 and a screw hole 8.

[0020] 6 to 10, measurement target 7 is a circular sticker similar to measurement target 1, and the back side of the sticker is affixed to target affixing portion 9. Target affixing portion 9 is a circular depression of the same dimensions as measurement target 7, formed so that its center point 10 is located on circle D concentric with measurement jig X2, and by affixing center point 11 of measurement target 7 to target affixing portion 9, it is also located on circle D concentric with measurement jig X2.

[0021] The screw hole 8 is formed through the measurement jig X2 in the direction F of the disk center line E of the measurement jig X2, and is formed concentrically with the measurement jig X2 with the screw hole center line G coinciding (positioned) with the disk center line E of the measurement jig X2.

[0022] In Figures 11 to 14, measuring jigs X1 and X2 are attached to anchor bolts Z fixed to concrete structures Y such as bridge abutments and piers, and are used to inspect (investigate) the position and inclination of the anchor bolts Z.

[0023] The anchor bolt Z is inserted into one or more drilled holes H in the concrete structure Y and fixed to the concrete structure Y, as shown in FIGS. As shown in Figures 11 and 12, when fixing the anchor bolt Z, the drilled hole H is drilled in the concrete structure Y and the anchor bolt Z is inserted into it. The drilled hole H is drilled in the concrete structure Y by, for example, a boring machine (core drill). The drilled hole H extends from the bottom of the drilled hole in the concrete structure Y and opens to the outside of the concrete structure Y (the outer surface YA of the concrete structure Y). A plurality of drilled holes H are drilled in the concrete structure Y as needed. The drilled hole H is a circular hole having a drilled hole diameter: d1 and is drilled in the concrete structure Y.

[0024] As shown in FIG. 12, an adhesive J (for example, a gel epoxy resin) is injected into one or more drilled holes H by an adhesive injector (not shown). As shown in Figures 11 and 12, one or more anchor bolts Z are inserted into drilled holes H into which adhesive J has been injected, and are fixed to the concrete structure Y by the adhesive J. The anchor bolt Z is arranged with its screw tip ZA (screw tip shank) protruding from the concrete structure Y (outer surface YA).

[0025] As shown in FIGS. 13 and 14, the measurement jig X1 is attached to the anchor bolt Z by screwing the screw tip portion ZA of the anchor bolt Z into the screw hole 2 from the cylindrical end surface 6.

[0026] In the measurement jig X1, the tube center line A coincides (is positioned) with the axial center line Za of the anchor bolt Z and is arranged concentrically with the anchor bolt Z, so that the center point 5 of the measurement target 1 is also arranged to coincide with the axial center line Za of the anchor bolt Z.

[0027] As shown in FIGS. 13 and 14, the multiple measurement jigs X1 are attached to the multiple anchor bolts Z, and are arranged so that the center point 5 of the measurement target 1 coincides with the axial center line Za of each anchor bolt Z.

[0028] When the measurement jig X1 is attached to each anchor bolt Z, the measurement target 1 of each measurement jig X1 can be photographed using a photographing means such as a digital camera, and the tip position of each anchor bolt Z can be analyzed (inspected / investigated) from the image data of each photographed measurement target 1.

[0029] As shown in FIGS. 13 and 14, the measurement jig X2 is attached to the anchor bolt Z by screwing it into the screw hole 8 from the disk end face 12 onto the screw tip portion ZA of the anchor bolt Z. The measuring jig X2 is screwed into the concrete structure Y at the screw tip ZA as shown in FIG.

[0030] In the measurement jig X2, the disk center line E coincides with (is located on) the axial center line Za of the anchor bolt Z and is arranged concentrically with the anchor bolt Z, and the center point 11 of the measurement target 7 is arranged on the concentric circle D of the anchor bolt Z.

[0031] As shown in FIGS. 13 and 14, the plurality of measurement jigs X2 are attached to the plurality of anchor bolts, and the center points 11 of the measurement targets 7 are arranged on the concentric circles D of the anchor bolts Z.

[0032] When the measuring jig X2 is attached to each anchor bolt Z, the measuring target 7 of each measuring jig X2 is photographed using a photographing means such as a digital camera, and from the image data of the photographed measurement target 7, the installation position of the measuring jig X2 of each anchor bolt Z and the concentric circle D on the base side can be analyzed, and its center K can be calculated.

[0033] The inclination of each anchor bolt Z can be analyzed (inspected / investigated) from the analysis results of the tip position of each anchor bolt Z, which was analyzed using measuring jig X1, and the calculation results of the center K on the base side of each anchor bolt, which was analyzed using measuring jig X2. [Explanation of symbols]

[0034] X1 Measuring jig (cap type) 1. Measurement target 2 screw holes 3 Target attachment section 4 Center point of target attachment 5. Measurement target center point 6 Cylinder end face X2 Measuring jig (disc-shaped) 7 Measurement Target 8 screw holes 9 Target attachment section 10 Center point of target attachment 11 Measurement target center point 12 Disc Surface

Claims

1. A measuring jig used to inspect the position and inclination of an anchor bolt that is fixed to a concrete structure and disposed with a screw tip protruding from the concrete structure, The cap-shaped (cylindrical) tube has a screw hole that opens onto one end surface of the tube and is formed concentrically with the center line of the tube, and the other end surface of the tube has a recess with the same dimensions as the measurement target, and the measurement target is attached to the recess. The screw is attached to the anchor bolt by screwing into a screw hole from the cylindrical end surface side that opens at the tip of the screw, a jig is disposed concentrically with the anchor bolt, and the center point of the measurement target is disposed so as to coincide with the center line of the jig. A measuring jig used to inspect the position and inclination of anchor bolts.

2. A measuring jig used to inspect the position and inclination of an anchor bolt that is fixed to a concrete structure and disposed with a screw tip protruding from the concrete structure, The disk is formed in a circular or semicircular shape, has a screw hole formed concentrically with the center line of the disk and penetrating the center, and has a measurement target provided on one surface on a circle concentric with the center line of the disk, The measurement target is attached to the anchor bolt by screwing into the screw hole so that the measurement target faces the tip of the screw, The jig is arranged concentrically with the anchor bolt, and the center point of the measurement target is arranged on a circle concentric with the center line of the jig. A measuring jig used to inspect the position and inclination of anchor bolts.

3. A measurement method for inspecting the position and inclination of an anchor bolt that is fixed to a concrete structure and disposed with a screw tip protruding from the concrete structure, comprising: an installation operation of installing the measuring jig according to claim 1 and / or claim 2 on the tip of the screw; a photographing operation for acquiring a photographic image including the measurement target attached to the measurement jig; a coordinate acquisition task of acquiring coordinates of the measurement target based on the photographic image; The position and inclination of the anchor bolt are inspected from the coordinates of a measurement target on the center line of the tip of the anchor bolt obtained from the jig described in claim 1 and / or the coordinates of a center determined from a circle concentric with the anchor bolt obtained from the jig described in claim 2. Measurement method for inspecting the position and inclination of anchor bolts.

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