Measuring jig

Abstract

To enable precise identification of the center position of the anchor hole. [Solution] The measuring jig of the present invention comprises a mounting member for attaching a target, one or more insertion members inserted into an anchor hole, and one or more connecting rods connecting the mounting member and the insertion members. The measuring jig of the present invention can be configured so that the overall length of the measuring jig can be changed by increasing or decreasing the number of connecting rods and / or changing the length of the connecting rods. Furthermore, the insertion members of the measuring jig of the present invention can be replaced with those having different outer diameters depending on the diameter of the anchor hole. In the measuring jig of the present invention, the mounting member and the insertion members can be connected such that their centers in a plan view are located on the same axis. In the measuring jig of the present invention, the insertion members can be provided with air vents that penetrate in the thickness direction.

Description

Technical Field

[0001] The present invention relates to a measuring jig, and more particularly to a measuring jig used for measuring the position of an anchor hole.

Background Art

[0002] In existing structures such as bridges, steel reinforcement members or the like may be retrofitted for the purpose of improving seismic resistance or countermeasures against aging. In such construction work, anchor bolts are provided in the existing structure, and the reinforcement members are fixed using the anchor bolts. Since the reinforcement members are arranged so as to straddle a plurality of anchor bolts, it is necessary to form a plurality of insertion holes corresponding to the arrangement of the anchor bolts in the reinforcement members.

[0003] When the position of the insertion hole formed in the reinforcement member is displaced from the position of the anchor bolt, it is difficult to attach the reinforcement member, and additional processing or adjustment work at the factory may be required. Therefore, when drilling holes in the reinforcement member, it is required to accurately identify the position of the anchor hole provided in the existing structure.

[0004] Conventionally, as a jig used for identifying the position of an anchor hole, a jig including an attachment portion for attaching a target and an insertion portion to be inserted into the anchor hole is known (see, for example, FIG. 26 of Patent Document 1). When using this jig, imaging is performed so that the targets of a plurality of jigs inserted into the anchor hole are included, and the center position of the anchor hole is identified based on the image obtained by the imaging.

Prior Art Documents

Patent Documents

[0005]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0006] Incidentally, when drilling anchor holes H in an existing structure S, the drilling tool T may interfere with the reinforcing bars B inside the existing structure S, as shown in Figure 7(a). In this case, it is necessary to shift the position and re-drill, as shown in Figure 7(b).

[0007] However, if drilling is performed multiple times, the unused anchor holes H (unreachable holes H1) enlarge the usable anchor holes H (regular holes H2), and the jig G inserted into regular hole H2 becomes loose (tilted) near the entrance, as shown in Figure 8, making it difficult to pinpoint the center position of regular hole H2. As a result, it may not be possible to drill holes in the precise location of the reinforcing members, and additional processing or adjustment work may be required at the factory.

[0008] This invention has been made in view of the above circumstances, and its objective is to provide a measuring jig that can accurately identify the center position of an anchor hole. [Means for solving the problem]

[0009] The measuring jig of this invention comprises a mounting member for attaching a target, one or more insertion members inserted into an anchor hole, and one or more connecting rods for connecting the mounting member and the insertion members.

[0010] The measuring jig of this invention can be configured so that its overall length can be changed by increasing or decreasing the number of connecting rods and / or changing the length of the connecting rods. Furthermore, the insertion member of the measuring jig of this invention can be replaced with one having a different outer diameter depending on the diameter of the anchor hole.

[0011] In this application, the concept of connecting the mounting member and the insertion member includes not only directly connecting the members to each other, but also combining the members so that the whole becomes a single measuring jig. [Effects of the Invention]

[0012] According to the measuring jig of this invention, the position of the insertion member can be adjusted to a position where there are no unreachable holes, so there is no rattle in the unreachable portion and the precise center position of the anchor hole can be determined. [Brief explanation of the drawing]

[0013] [Figure 1] (a) is a perspective view showing an example of a measuring jig, and (b) is an exploded view of the measuring jig in (a). [Figure 2] (a) to (c) are explanatory diagrams showing examples of connection patterns for the measuring fixture. [Figure 3] (a) and (b) are explanatory diagrams illustrating examples of how to use the measuring jig. [Figure 4] (a) is an explanatory diagram showing an example of an insertion member having air vents around the connecting rod insertion hole, and (b) is an explanatory diagram showing an example of an insertion member having air vents on the outer circumference. [Figure 5] (a) is an explanatory diagram showing an example of an insertion member made of a perforated member, and (b) is an explanatory diagram showing an example of an insertion member having multiple ribs and grooves (air vents) on its outer surface. [Figure 6] An explanatory diagram showing an example of an insert member having a tapered surface. [Figure 7] (a) is an explanatory diagram of what happens when the drilling tool interferes with the reinforcing bar, and (b) is an explanatory diagram of an unreachable hole and a properly drilled hole. [Figure 8] An explanatory diagram showing the looseness of the jig within the standard hole, which has widened due to the hole not being reached. [Modes for carrying out the invention]

[0014] (Embodiment) An example of the measuring jig of this application will be described with reference to the drawings. As an example, the measuring jig 10 shown in Figures 1(a) and 1(b) comprises a mounting member 11, an insertion member 12, and a connecting rod 13. These parts are configured as separable parts as shown in Figure 1(b) and are used by connecting them as shown in Figure 1(a).

[0015] The mounting member 11 is a member for mounting the target 14. The mounting member 11 of the present embodiment is a plate-like member having a size and shape that do not fit into the anchor hole H. A housing recess 11a for housing the target 14 is provided on the upper surface side of the mounting member 11. The mounting member 11 can have an arbitrary shape as long as it does not fit into the anchor hole H and has a shape to which the target 14 can be mounted.

[0016] The insertion member 12 is a member inserted into the anchor hole H. The insertion member 12 of the present embodiment is disk-shaped with a connecting rod insertion hole 12a provided at the center. The outer diameter of the insertion member 12 is made the same as or slightly smaller than the anchor hole H so that it can be inserted into the anchor hole H. In the present embodiment, the insertion member 12 is made into a disk shape with a thickness smaller than the diameter.

[0017] Insertion members 12 with various outer diameters can be prepared so that the insertion member 12 can be selected (exchanged) according to the size (anchor hole diameter) of the anchor hole H. In any case, all or part of the outer peripheral surface of the insertion member 12 can be configured to function as a contact surface that contacts the inner peripheral wall of the anchor hole H.

[0018] The connecting rod 13 is a member that connects the mounting member 11 and the insertion member 12. The connecting rod 13 of the present embodiment is a bar having a hexagonal cross-section, with a male screw portion 13a provided at the upper end and a female screw portion 13b (Figs. 2(a) to (c)) provided at the lower end. The male screw portion 13a can be screwed into the female screw portion 13b of another connecting rod 13, and the female screw portion 13b can be screwed into the male screw portion 13a of another connecting rod 13. The connecting rod 13 can be made of various materials having sufficient rigidity so as not to affect the measurement.

[0019] The parts configured as described above can be adjusted in the number of combinations so as to have an arbitrary length and connected integrally for use. There is no restriction on the number of insertion members 12 and connecting rods 13 to be connected, and the number can be appropriately set according to the depth of the anchor hole H.

[0020] Figures 2(a) to 2(c) show examples of connection patterns (combinations). Figure 2(a) shows four insertion members 12 and four connecting rods 13 connected alternately, with an attachment member 11 connected to the tip (upper end); Figure 2(b) shows three insertion members 12 and three connecting rods 13 connected alternately, with an attachment member 11 connected to the tip (upper end); and Figure 2(c) shows two insertion members 12 and two connecting rods 13 connected alternately, with an attachment member 11 connected to the tip (upper end).

[0021] In each case, a first end fastener 13c with a female thread is screwed onto the male threaded portion 13a of the uppermost connecting rod 13 in each figure, and a second end fastener 13d with a male thread is screwed onto the female threaded portion 13b of the lowermost connecting rod 13 in each figure.

[0022] By providing the first end fastener 13c and the second end fastener 13d, the mounting member 11 and the bottom end insertion member 12 are prevented from coming loose and are integrated into a usable state. Washers (first washer 13e and second washer 13f) can be interposed when fastening with the first end fastener 13c and the second end fastener 13d.

[0023] In the examples in Figures 2(a) to 2(c), the insertion members 12 and connecting rods 13 are arranged alternately as an example, but the intermediate insertion members 12 can be omitted. For example, in the examples in Figures 1(a) and 1(b), no insertion members 12 are provided between the two lower connecting rods 13.

[0024] Furthermore, the position in which the insertion member 12 is provided can be adjusted as appropriate. For example, if the entrance side of the regular hole H2 (see Figure 7(a)) is connected to the unreachable hole H1, by providing the insertion member 12 so that it is located further back than the unreachable hole H1, the measuring jig 10 will be less prone to rattling (tilting).

[0025] Furthermore, the number of insertion members 12 can be determined according to the depth of the anchor hole H, but if two or more insertion members 12 are provided, the outer surface of the insertion member 12 will come into contact with two or more places on the inner wall of the anchor hole H, making it less likely for rattling to occur.

[0026] The measuring jig 10, configured as described above, is connected such that when the mounting member 11, insertion member 12, and connecting rod 13 are joined together, the centers of each part (all parts in this embodiment) in the in-plane direction (the center of each part in a plan view; the same applies hereinafter) are aligned in a line; in other words, the centers of each part in the in-plane direction are aligned (located) on the same axis.

[0027] As shown in Figures 3(a) and 3(b), the measuring jig 10 of this embodiment can be used by inserting it into the anchor hole H with the mounting member 11 facing outwards from the existing structure S. A target 14 is attached to the mounting member 11 that is exposed to the outside of the existing structure S.

[0028] Typically, multiple anchor holes H are formed in an existing structure S, so this process is performed on all anchor holes H. Afterward, photography is performed with all targets 14 included, and by processing the images obtained from this photography, the center position of the anchor holes H can be identified.

[0029] (modified version) Next, a modified example of the measuring jig 10 will be described. In the above embodiment, the insertion member 12 is shown as a disc shape with no holes other than the connecting rod insertion hole 12a, but the insertion member 12 can also be made to have a structure that includes one or more air vents 12b through which air can pass.

[0030] The air vents 12b can be provided around the connecting rod insertion hole 12a of the insertion member 12, for example, as shown in Figure 4(a). Alternatively, the air vents 12b can be provided by cutting out a notch on the outer circumference of the insertion member 12, as shown in Figure 4(b). The air vents 12b can be circular, elliptical, or any other shape.

[0031] In addition, as shown in Figure 5(a), the insertion member 12 can be constructed from a perforated material such as expanded metal or perforated metal, and these holes can be used as air vents 12b. In this case, the outer circumference of the expanded metal or perforated metal can be covered with a coating material 12c such as silicone or resin to improve its slipperiness and make it easier to insert into the anchor hole H.

[0032] Furthermore, as shown in Figure 5(b), multiple ribs 12d can be formed on the outer circumferential surface of the insertion member 12 along the thickness direction, and the grooves 12e formed by these ribs 12d can be used as air vents 12b. In some cases, the insertion member 12 itself can have a polygonal cross-section (for example, a regular hexagon or a regular octagon), and the gap between it and the inner circumferential wall of the anchor hole H can be used as an air vent 12b.

[0033] As shown in these modifications, providing air vents 12b through which air passes reduces resistance when inserting the measuring jig 10 into or removing it from the anchor hole H, offering the advantage of smoother insertion. In actual construction sites, a considerable number of measuring jigs 10 need to be inserted, and this significantly contributes to shortening the construction period overall.

[0034] In the above embodiment, one example is the use of a disc-shaped insert member 12 having a uniform or substantially uniform outer diameter throughout the thickness direction. However, as shown in Figure 6, the insert member 12 can also have a structure with a tapered surface 12f on its outer circumferential surface.

[0035] (Effects common to this embodiment and each of its modifications) Finally, the effects common to this embodiment and each of its modifications will be described. Each measuring jig 10 disclosed in this application is composed of multiple separable parts, which has the advantage of not being bulky overall and being easy to transport to the site.

[0036] Furthermore, since the overall length of the measuring jig 10 can be changed by increasing or decreasing the number of connecting rods 13 and / or changing the length of the connecting rods 13, it can be used for anchor holes H of various depths, and has the advantage of not requiring the preparation of individual measuring jigs 10 for each size of anchor hole H.

[0037] Furthermore, since the installation position of the insertion member 12 can be adjusted as needed, by considering its positional relationship with the unreachable hole H1 (see Figure 7(b)) and positioning the insertion member 12 further back than the depth of the unreachable hole H1, the measuring jig 10 is less likely to wobble.

[0038] It should be noted that the configurations of this embodiment and its modified examples are merely illustrative, and the measuring jig of this application is not limited to the configurations of the above-described embodiment and its modified examples. Each configuration of the above-described embodiment and its modified examples can be appropriately modified, such as by replacing, omitting, or adding components, to the extent that the intended purpose can be achieved.

[0039] Furthermore, the embodiments and modifications described above are examples only and do not constitute a basis for restricting the technical scope of the present invention. The technical scope of the present invention is defined based on the claims. The technical scope of the present invention also includes equivalents to the claims. [Industrial applicability]

[0040] The measuring jig of this invention can be suitably used, for example, to measure the center position of an anchor hole using a laser tracker, total station, photogrammetry, etc. [Explanation of symbols]

[0041] 10 Measuring jigs 11 Mounting components 11a Recessed housing 12 Insertion member 12a Connecting rod insertion hole 12b Air vent 12c Covering material 12d rib 12e groove 12f Tapered Face 13 Connecting rod 13a Male threaded section 13b Female thread section 13c First end fastener 13d Second end fastener 13e First Washer 13f Second Washer 14 Targets B Reinforcement G Jig H Anchor Hole H1 unreachable hole H2 regular hole S Existing structure T-Drilling Tool

Claims

1. A mounting member for attaching the target, Two or more insertion members to be inserted into the anchor hole, The mounting member and the insertion member are connected by one or more connecting rods, The two or more insertion members are connected by a connecting rod and are configured to be arranged at intervals in the direction of the connection. Each of the aforementioned insertion members is provided with a contact portion that contacts the inner circumferential wall of the anchor hole when inserted into the anchor hole. A measuring jig characterized by the following features.

2. The measuring jig is configured such that the overall length can be changed by increasing or decreasing the number of connecting rods and / or by changing the length of the connecting rods. The measuring jig according to claim 1.

3. The insertion member can be replaced with one of different outer diameters depending on the anchor hole diameter. A measuring jig according to claim 1 or claim 2.

4. The mounting member and the insertion member are connected such that their respective centers in a plan view lie on the same axis. A measuring jig according to claim 1 or claim 2.

5. The insert member has air vents that penetrate in the thickness direction, A measuring jig according to claim 1 or claim 2.

6. The insertion member is provided with a connecting rod insertion hole through which a connecting rod can be inserted, The connecting rod insertion hole is configured to allow the connecting rod to be inserted from both sides in the thickness direction of the insertion member. A measuring jig according to claim 1 or claim 2.

7. The insertion member is configured such that a connecting rod inserted from one side in the thickness direction of the insertion member and another connecting rod inserted from the other side are screwed into the connecting rod insertion hole of the insertion member, thereby connecting the two connecting rods. The measuring jig according to claim 6.

8. The mounting member is a plate-shaped object of a size and shape that does not fit into the anchor hole. A recess for accommodating a target is provided on one side of the mounting member. A measuring jig according to claim 1 or claim 2.

9. The insertion member is disc-shaped, with a wall thickness smaller than its diameter. A measuring jig according to claim 1 or claim 2.

Images