Target support

Abstract

This invention provides a target support that can be used as a measuring target to reflect distance-measuring light emitted from a measuring device during surveying work, and that can be stably fixed to a structure. [Solution] The target support comprises a plate-shaped body 10 that constitutes the main body and a retroreflective portion 20 fixed to the upper surface of the plate-shaped body. The plate-shaped body comprises a flat portion to which the retroreflective portion is fixed, a back surface facing the flat portion and on which a magnetic adsorption portion is provided, and four side portions connecting the flat portion and the back surface. The side portions are provided with through holes 50a, 50b, 50c, and 50d through which a string-like member can be inserted.

Description

Technical Field

[0001] This invention relates to a target support tool used in surveying work.

Background Art

[0002] At the construction site of a structure, it may be necessary to check the position, inclination, displacement, etc. of structures such as steel columns. Therefore, a target such as a prism is attached to the structure, and the target is surveyed by a surveying device.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, the attachment position of the target is often at a high place, and there are also many cases where the shape of the structure is complex. Therefore, it may be difficult to stably fix the target at the desired position. As a result, the target may shift or fall off during surveying, leading to a decrease in surveying accuracy and a deterioration in work efficiency. In view of the above problems, the present disclosure aims to provide a target support tool that can be stably fixed to a structure.

Means for Solving the Problems

[0005] The present disclosure is a target support tool including a plate-like body, a retroreflective portion fixed to the flat surface portion of the plate-like body, and at least two through-hole portions provided at the outer edge portion of the plate-like body through which a string-like member can be inserted.

Effects of the Invention

[0006] According to this disclosure, the target support can be stably fixed to the structure. [Brief explanation of the drawing]

[0007] [Figure 1] This is a perspective view of the target support according to this embodiment. [Figure 2] This is a plan view of the target support according to this embodiment. [Figure 3] This is a side view of the target support according to this embodiment. [Figure 4] This is a bottom view of the target support according to this embodiment. [Figure 5] This is an exploded perspective view of the target support according to this embodiment. [Figure 6] This figure shows a first modified example of the target support according to this embodiment. [Figure 7] This figure shows a second modified example of the target support according to this embodiment. [Modes for carrying out the invention]

[0008] The embodiments for carrying out this invention will be described in detail below with reference to the drawings. In each drawing, the same or corresponding components are denoted by the same reference numeral, and redundant explanations will be omitted as appropriate.

[0009] Figure 1 is a perspective view of the target support 1 according to this embodiment. Figure 2 is a plan view of the target support 1 according to this embodiment. Figure 3 is a side view of the target support 1 as seen from the direction of the arrow shown in Figure 1. Figure 4 is a bottom view of the target support 1 according to this embodiment. The target support 1 according to this embodiment is used as a measuring target for reflecting distance measuring light emitted from a measuring device such as a total station in surveying work. The target support 1 mainly comprises a plate-shaped body 10 that constitutes the main body and a retroreflective part 20 fixed to the upper surface of the plate-shaped body 10.

[0010] The target support 1 has at least two through-holes on the outer edge of the plate-shaped body 10 through which a string-like member (e.g., cable tie, wire, rope, etc.) can be inserted. Figure 1 shows an example in which side through-holes 50a, 50b, 50c, and 50d through which a string-like member can be inserted are formed at each of the four corners of the plate-shaped body 10. In addition, a magnetic adsorption part is provided on the side of the plate-shaped body 10 opposite to the side to which the retroreflective part 20 is fixed (the back side), which can be attracted to an external structure having a magnetic material such as a steel frame. With these configurations, the target support 1 can be stably installed on an external structure by multiple methods, such as binding and fixing with a string-like member or magnetic attraction and fixing.

[0011] The plate-like body 10 is a block-shaped member that serves as the base of the target support 1, and in this embodiment, it is configured as a block-shaped member having a substantially square shape in plan view. The material of the plate-like body 10 is not particularly limited, but it can be formed using, for example, a metal material such as aluminum alloy or stainless steel, or a synthetic resin material such as ABS resin or polycarbonate.

[0012] The plate-like body 10 has a substantially flat planar portion to which the retroreflective portion 20 is fixed, a back surface facing the planar portion and on which the magnetic adsorption portion is provided, and four side surfaces connecting the planar portion and the back surface.

[0013] Figure 5 is an exploded perspective view of the target support 1 according to this embodiment. As shown in Figure 5, the plate-shaped body 10 can also be configured to be separable into an upper plate to which the retroreflective part 20 is attached and a lower holder to which the magnetic adsorption part is housed. In this case, the upper plate and the lower holder are detachably integrated by fastening members such as screws inserted through through holes (for example, through holes 12a to 12d in the center of the sides). Figures 1 and 2 show an example in which the upper plate and the lower holder are fastened together by socket head cap screws inserted through through holes 12a and 12c in the center of the sides. Such a separable structure is advantageous in that it facilitates changes in the specifications of the retroreflective part 20 and the magnetic adsorption part, or replacement of parts in case of damage, thereby improving the versatility and maintainability of the product.

[0014] The retroreflective section 20 is an optical element that has the function of accurately reflecting light incident from the measuring device back in the direction of the light source. This enables the measuring device to measure the distance to the target support 1 and its three-dimensional coordinates with high precision.

[0015] In this embodiment, the retroreflective section 20 is configured as a prism unit in which multiple corner cube prisms are integrally connected. Specifically, as shown in Figure 1, four triangular pyramidal corner cube prisms are combined so that their respective vertices converge at a single central point, forming a square pyramidal shape with a square base. This configuration allows for excellent retroreflective performance against incident light from a wide range of angles in both the horizontal and vertical directions. The retroreflective section 20, consisting of this prism unit, is firmly fixed to approximately the center of the flat surface of the plate-like body 10 using adhesive, screws, etc., with its square base.

[0016] Figure 7 shows a modified example of the retroreflective section 20 fixed to the target support 1 according to this embodiment. As shown in Figure 7, the retroreflective section 20 can also employ an octahedral prism unit formed by bonding two square pyramidal prism units together at their bases. This octahedral prism unit can accommodate incident light from a wider range of solid angles. The retroreflective section 20 is not limited to a configuration combining multiple corner cube prisms, and various known means can be appropriately employed, such as a single large corner cube prism or a retroreflective sheet coated or attached with fine glass beads or microprisms.

[0017] As shown in Figure 2, multiple through-holes are drilled in the flat surface of the plate-like body 10. These through-holes function as holes through which a string-like member for fixing the target support 1 to an external structure is inserted, as screw holes for fastening the upper plate and the lower holder, or as mounting holes for attaching the magnetic adsorption part to the back surface of the plate-like body 10.

[0018] Specifically, at the four corners of the flat surface portion of the plate-like body 10, corner through-hole portions 11a, 11b, 11c, and 11d are provided respectively. These corner through-hole portions 11a, 11b, 11c, and 11d are circular holes that penetrate the plate-like body 10 vertically from the flat surface portion toward the back surface. These holes can be used as holes for passing a string-like member, and also function as an entrance communicating with the through-hole portions on the side surface described later.

[0019] Also, on the flat surface portion of the plate-like body 10, side-center through-hole portions 12a, 12b, 12c, and 12d are provided respectively so as to be located approximately at the center of each side. These side-center through-hole portions 12a, 12b, 12c, and 12d are also circular holes that penetrate the plate-like body 10 vertically, and are mainly used as screw holes through which fastening screws for fixing the aforementioned upper plate and lower holder are inserted. Of course, these holes can also be used for inserting a string-like member as needed.

[0020] Furthermore, around the central region where the retroreflective portion 20 is arranged on the flat surface portion, magnet mounting holes 13a, 13b, 13c, and 13d are provided. These magnet mounting holes 13a, 13b, 13c, and 13d are holes into which screws for fixing the magnetic adsorption portions provided on the lower holder are screwed, but depending on the fixing method of the plate-like body 10, they can also be used as screw holes for attaching other jigs or the like. Thus, by preliminarily providing a plurality of through-hole portions, it becomes possible to flexibly respond to various fixing methods and assembly methods.

[0021] On the side surface portion of the plate-like body 10, side surface through-hole portions 50a, 50b, 50c, and 50d for inserting a string-like member (for example, a binding band, a wire, a rope, etc.) are provided. This side surface through-hole portion is formed so as to penetrate two adjacent side surfaces at the corner of the plate-like body 10.

[0022] This structure is realized, for example, by a combination of an upper plate and a lower holder as shown in Figure 5. Specifically, grooves 70b, 70c, and 70d are formed at the four corners of the lower holder, respectively, with a shape that continuously carves out two adjacent sides. On the other hand, the aforementioned corner through holes 11a to 11d are drilled vertically into the upper plate.

[0023] When the upper plate and lower holder are stacked and integrated, each corner through-hole of the upper plate communicates with the internal space of the grooves provided at the corresponding corners of the lower holder. As a result, a three-way branched flow path is formed, in which one through-hole has an opening in the flat section as an inlet and two outlets opening on two adjacent sides. For example, when the corner through-hole 11b communicates with the internal space of the groove 70b provided at the corresponding corner of the lower holder, a side through-hole 50b is formed. The side through-hole 50b also communicates with the corner through-hole 11b.

[0024] The through-hole in this configuration allows the string-like member to be inserted through an opening on one side of the plate-like body 10, along the corner, and pulled out through an opening on the adjacent other side or flat surface. Furthermore, the through-hole is not limited to a configuration with openings on two adjacent sides; it may also be configured with openings on two opposing sides of the plate-like body 10, allowing the string-like member to pass between these openings.

[0025] Furthermore, each side surface is provided with a plurality of recesses 60a, 60b, 60c, 60d, 60e, and 60f, which are formed as arc-shaped cutouts. These recesses function as engagement points to facilitate removal by an operator when the target support 1 is strongly attracted to a flat external structure such as a steel frame by the magnetic attraction part, and also function as finger grips for operation by an operator. The depth and curvature of the recesses 60a, 60b, 60c, 60d, 60e, and 60f are set so that the operator (for example, a finger, a gloved finger, a rod-shaped member, a screwdriver or other tool) can be easily engaged.

[0026] Furthermore, a magnetic adsorption section is provided on the back surface of the plate-like body 10. The magnetic adsorption section is composed of one or more powerful permanent magnets and has the function of easily and firmly holding the target support 1 by magnetic force to an external structure made of steel frame, steel plate, or other magnetic material. Note that the planar shape of the plate-like body 10 is not limited to the substantially square shape shown in the figure, but may be circular, polygonal, or the like.

[0027] Figure 4 is a bottom view of the target support 1, showing the configuration of the magnetic adsorption part. The magnetic adsorption part is provided on the back surface of the plate-shaped body 10, that is, on the surface opposite to the flat surface to which the retroreflective part 20 is fixed. This magnetic adsorption part has the function of attracting and holding the target support 1 to an external structure made of steel frame, steel plate, or other magnetic material by magnetic force.

[0028] Specifically, the magnetic adsorption section is composed of one or more powerful permanent magnets. In this embodiment, a plurality of cylindrical recesses 43a, 43b, 43c, and 43d for housing magnets are formed on the back surface of the plate-like body 10. These cylindrical recesses are provided in areas corresponding to the four corners of the back surface of the plate-like body 10, and magnet mounting holes 13a, 13b, 13c, and 13d are provided at positions corresponding to each recess. Permanent magnets such as disc-shaped neodymium magnets or rare-earth magnets are fixed in these cylindrical recesses via the magnet mounting holes 13a, 13b, 13c, and 13d. The magnets are positioned so that their surfaces are flush with the back surface of the plate-like body 10, or so that they protrude slightly.

[0029] By arranging multiple magnets in a distributed manner, the target support 1 can be stably attracted to the surface of an external structure. The number, arrangement, and magnetic force of the magnets are appropriately set according to the weight of the target support 1 and the expected usage environment. For example, depending on the required attractive force, configurations such as placing magnets in all four recesses, placing them in only two diagonally opposite locations, or placing a single, more powerful magnet in the center are also possible. Figure 4 shows an example in which magnets 33b and 33d are placed in the two recesses 43b and 43d, respectively.

[0030] Figure 6 is a plan view showing the target support 1 with the fastening device attached. The target support 1 of this embodiment may further be equipped with a fastening device that can be attached to a carried item (for example, a worker's belt, safety harness, tool bag).

[0031] Examples of fastening devices include carabiners as shown in Figure 6, as well as hooks, straps, and cords. These fastening devices are attached to any of the through-holes provided in the plate-shaped body 10, for example, the corner through-hole 11a. This allows workers to safely and easily transport the target support device 1 by suspending it from their body or equipment. Furthermore, when using the target support device 1 attached to a structure such as a steel frame using a magnet, it can be connected to the steel frame with a wire or the like via the fastening device. This prevents the target support device 1 from falling even if the magnetic hold is lost. In this way, it also functions as an auxiliary safety measure to prevent accidental falls during work at heights.

[0032] Although the scope of this disclosure has been described above along with embodiments, these embodiments are merely examples of concrete implementations of the present invention, and the technical scope of the present invention should not be interpreted as being limited by them. In other words, the present invention can be implemented in various forms without departing from its technical concept or its main features. [Explanation of Symbols]

[0033] 1; Target support 1 0; plate-like body 11a, 11b, 11c, 11d: Corner holes 12a, 12b, 12c, 12d: Central through-holes on the sides 13a, 13b, 13c, 13d: Magnet mounting holes 20: Retroreflective part 33b, 33d: Magnets 50a, 50b, 50c, 50d: Side hole 60a, 60b, 60c, 60d, 60e, 60f: depression

Claims

1. Plate-like body and, A retroreflective portion fixed to the flat surface of the plate-like body, The outer edge of the plate-like body is provided with a through-hole through which a string-like member can be inserted, A target support device equipped with the following features.

2. The target support device according to claim 1, wherein the through-hole is provided on the side surface of the plate-like body.

3. The aforementioned side portion is formed by a plurality of planes, The target support according to claim 2, wherein the through-hole is provided penetrating the two planes of the side surface.

4. The target support according to claim 2, wherein the side portion is provided with a recess for engaging an operating member.

5. The target support device according to claim 1, wherein the through-hole portion is provided on the flat portion.

6. The target support according to claim 1, wherein a magnetic adsorption portion capable of adsorbing to an external structure having a magnetic material is provided on the surface of the plate-like body opposite to the surface on which the retroreflective portion is fixed.

7. The target support according to claim 1, wherein the retroreflective portion is a prism unit in which a plurality of corner cube prisms are connected.

8. The target support according to claim 1, wherein at least one of the through-holes is fitted with a locking device capable of locking onto a portable article.

9. The target support according to claim 1, wherein the retroreflective portion is composed of a retroreflective reflective sheet.

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