Reflective material

Abstract

To improve durability while ensuring the reflective performance of a reflective member. [Solution] The reflecting member 10 has a prism unit formed by connecting multiple corner cube prisms 11a, 11b, and is a polyhedral reflecting member that retroreflects at least a portion of the incident light rays, and has prism protection members 13a, 13b, 13c that protrude outward from at least one of multiple ridges connecting the vertex 12 of the prism unit to other vertices of the polyhedron.

Description

[Technical Field]

[0001] The present invention relates to a reflecting member that is constructed by combining prisms having a plurality of reflecting surfaces. [Background technology]

[0002] In recent years, at construction sites, after pillar members such as steel columns have been largely assembled (after erection), re-plunging work is carried out to adjust the pillar members so that they are perpendicular to a horizontal plane. The amount of tilt of the pillar members is determined by measuring a target attached to the pillar with a surveying device. Patent Document 1 discloses a target support for attaching a target to an adherend such as a pillar. Prisms are widely used as surveying targets at construction and civil engineering sites. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Publication No. 2023-48302 Summary of the Invention [Problem to be solved by the invention]

[0004] While prisms possess precise optical performance, they are often made of brittle materials such as glass, and parts of them can chip or break when touched or dropped during handling or on-site work. Such damage can reduce reflective performance and degrade surveying accuracy, so improved impact resistance is required. Furthermore, even when protective materials are installed, they must be designed to not impair reflective performance. [Means for solving the problem]

[0005] The reflecting member of the present disclosure is a polyhedral reflecting member that has a prism unit formed by connecting multiple corner cube prisms and that retroreflects at least a portion of incident light rays, and is characterized in that at least one of multiple ridges connecting the vertex of the prism unit to other vertices of the polyhedron has a prism protection member that protrudes outward from the ridge. [Effects of the Invention]

[0006] According to the present disclosure, it is possible to improve the durability of the reflective member while ensuring the reflective performance of the reflective member. [Brief explanation of the drawings]

[0007] [Figure 1] 1 is a perspective view showing a state in which the reflecting member according to the embodiment is attached to a reflecting member support. FIG. [Figure 2] FIG. 2 is a perspective view showing a reflecting member according to the embodiment. [Figure 3] FIG. 2 is a top view showing a reflecting member according to the embodiment. [Figure 4] FIG. 2 is a front view showing the reflecting member according to the embodiment. [Figure 5] FIG. 10 is a diagram showing an example of a frame body. [Figure 6] FIG. 10 is a front view showing a modified example of the reflecting member according to the embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0008] Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

[0009] 1 is a perspective view showing a state in which a reflecting member 10 according to this embodiment is attached to a reflecting member support 20. The reflecting member support 20 is a support for supporting the reflecting member 10, which is a measurement target that can be used to measure spatial shapes. The reflecting member support 20 has a mechanism for attaching it to an object to be adhered, such as a structure or a moving object, and serves to stably hold the reflecting member 10.

[0010] In this embodiment, the reflecting member support 20 is formed in a generally L-shape as a whole in a plan view, and can be used by a worker by abutting it against a right-angled portion such as a pillar-shaped building structure or the corner of an interior wall in an indoor space. In addition, a magnet (not shown) is provided on the inner surface of the reflecting member support 20. This allows a worker to fix the reflecting member 10 to an object made of a metal material such as a steel frame.

[0011] Fig. 2 is a perspective view showing the reflecting member 10 according to this embodiment. Fig. 3 is a top view showing the reflecting member 10 according to this embodiment. Fig. 4 is a front view showing the reflecting member 10 according to this embodiment. The reflecting member 10 according to this embodiment has a prism unit formed by connecting a plurality of corner cube prisms 11.

[0012] 2 and 3, the reflecting member 10 has a pyramidal shape (quadratic pyramid shape) as a whole, with a square base, formed by connecting the side faces of four corner cube prisms 11 (11a, 11b, 11c, 11d) between adjacent corner cube prisms. However, the shape of the reflecting member 10 is not limited to this, and it may be a shape combining two or three corner cube prisms 11, and is not particularly limited as long as it has a shape that retroreflects at least a portion of incident light rays.

[0013] 2 and 3, a prism unit formed by connecting four corner cube prisms 11 (11a, 11b, 11c, 11d) is adhered to a base 16. In the reflecting member 10 according to this embodiment, the side surfaces of the quadrangular pyramid are formed as the entrance surfaces of the corner cube prisms 11. By combining multiple corner cube prisms 11, high retroreflective performance can be achieved.

[0014] As shown in Figures 3 and 4, each ridge of the quadrangular pyramid (the ridge connecting the apex of the quadrangular pyramid to each apex of the base) is provided with a prism protection member 13 (13a, 13b, 13c, 13d) that protrudes outward from the entrance surface of the corner cube prism 11. The prism protection member 13 serves to protect the prism by preventing external impacts and loads from being directly applied to the prism. The prism protection member 13 is made of a different material from the corner cube prism 11, a material that is impact-resistant. The shape and arrangement of the prism protection member 13 are designed to maintain visibility and retroreflection performance suitable for surveying targets.

[0015] Prism protection member 13 is formed as a rib-like member that continues along each ridge line of the quadrangular pyramid. In this embodiment, prism protection member 13 as a rib-like member is provided for each of the four ridge lines. However, it is sufficient that a rib member is provided on at least one of the four ridge lines.

[0016] The height of the rib-shaped members is designed to protrude approximately 0.1 to 1.5 millimeters from the entrance surface of the corner cube prism 11. Increasing the height of the rib-shaped members effectively prevents the entrance surface of the prism from coming into direct contact with the outside, further improving durability. On the other hand, from the perspective of minimizing errors that occur when combining multiple corner cube prisms 11, it is also important not to make the rib-shaped members excessively thick. By setting the appropriate height and thickness, it is possible to achieve both protective performance and retroreflective performance.

[0017] 2 and 3, the base 16 has an attachment portion 15 for attaching it to the reflecting member support 20. In this embodiment, two fixing holes 15a and 15b such as screw holes are formed in the base 16. The two fixing holes 15a and 15b are examples of attachment portions 15 for attaching the reflecting member 10 to the reflecting member support 20. Note that as long as the structure allows the base 16 to be attached to the reflecting member support 20, it is not limited to a configuration using screws, and other configurations such as adhesive bonding may also be used.

[0018] FIG. 5 is a diagram showing an example of a frame that holds the reflecting member 10 from the inside. In this embodiment, the frame 18 is composed of two isosceles triangular plate members. These two plate members intersect each other at a right angle along the midline of the isosceles triangle and are placed on the base 16 so as to separate the connecting surfaces of adjacent corner cube prisms 11. The contact surfaces between the side surfaces of the corner cube prisms 11 and the frame 18 are bonded together. In this way, the frame 18 supports the entire reflecting member 10.

[0019] The dashed line in Figure 5 indicates the position of the hypotenuse (the ridge line of the quadrangular pyramid) of the corner cube prism 11. In this embodiment, the prism protection member 13 is formed by a portion that protrudes outward from this dashed line. In other words, the prism protection member 13 is formed integrally with the frame 18. The frame 18 is made of a highly durable material and serves to improve the rigidity of the reflecting member 10.

[0020] 4, the upper end 12 of the frame 18 (where the four corner cube prisms 11 (11a, 11b, 11c, 11d) are gathered) is cut or chamfered, thereby eliminating sharp protrusions on the reflecting member 10 and improving safety during use.

[0021] Figure 6 shows a modified example of the reflecting member according to this embodiment. The reflecting member 30 shown in Figure 6 has an octahedral shape, with two prism units, as described with reference to Figures 2 to 4, bonded at their bottom surfaces to both sides of a base 26. The base 26 is provided to separate the bonding surfaces, and the two prism units are supported by the base 26. One end of the base 26 extends horizontally. A mounting portion 25 is provided on the extension for mounting the reflecting member 30 to a reflecting member support.

[0022] Although the scope of the present disclosure has been explained above in conjunction with the embodiments, the above embodiments are merely illustrative examples of the implementation of the present invention, and the technical scope of the present invention should not be interpreted as being limited by these embodiments. In other words, the present invention can be implemented in various forms without departing from its technical idea or main features. [Explanation of symbols]

[0023] 10, 30: Reflecting member, 11: Corner cube prism, 13: Prism protection member, 15, 25: Mounting portion, 16, 26: Base, 18: Frame, 20: Reflecting member support

Claims

1. A polyhedral reflecting member having a prism unit formed by connecting a plurality of corner cube prisms and retroreflecting at least a portion of incident light, A reflecting member characterized in that at least one of a plurality of ridges connecting the vertex of the prism unit and another vertex of the polyhedron has a prism protection member that protrudes outward from the ridge.

2. 2. The reflecting member according to claim 1, further comprising a mounting portion for mounting the reflecting member on a support.

3. 2. The reflecting member according to claim 1, wherein the prism protection member is formed as a rib-like member that is continuous along the ridge line.

4. 2. The reflecting member according to claim 1, wherein the reflecting member is configured by connecting at least three or more of the corner cube prisms.

5. 2. The reflecting member according to claim 1, wherein the prism unit has a quadrangular pyramid shape formed by connecting four of the corner cube prisms.

6. The prism unit is bonded to a base, the base is provided with a frame body in which a plurality of plate members intersect each other at right angles and are arranged to separate the connecting surfaces of the adjacent corner cube prisms; 2. The reflecting member according to claim 1, wherein the prism protection member is formed by an upper end of the frame that protrudes outward beyond the ridge line.

7. 6. An octahedral reflecting member, comprising the quadrangular pyramidal prism unit according to claim 5 bonded to both sides of a base.

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