JP6727590B1 - Retroreflector - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a retroreflector capable of fixing a part of a corner cube prism constituting a prism assembly so as to be freely replaceable. A retroreflective device (100) includes a prism assembly having a plurality of corner cube prisms (131), a set of a first member (110) and a second member (120) holding the prism assembly so as to sandwich the prism assembly, a first member (110) and a second member (110). The second member 120 is provided on the second member 120 to prevent the prism assembly from being displaced, the first hole formed in the first member 110, the second hole formed in the second member 120, and the second hole formed in the second member 120. A shaft portion 140 inserted through the first hole portion and the second hole portion, a holding mechanism 150 that holds the state in which the prism assembly is held between the first member 110 and the second member 120, the first member 110 and the second member 120. Has a rotation restraint mechanism 160 for restraining relative rotation around the shaft 140. [Selection diagram] Fig. 5

Description

The present invention relates to a retroreflective device.

The theodolite or total station measures the incident direction of the retroreflected light, which is the light that is oscillated from the position where the theodolite or total station is set and is retroreflected by the target, and thus obtains data that contributes to the survey. A corner cube prism capable of retroreflection may be used as such a target.

Here, in the corner cube prism, a reflecting surface capable of retroreflecting light is determined. That is, the corner cube prism cannot retroreflect light incident on a surface other than the reflecting surface. Therefore, when the corner cube prism is used as a target for surveying work, it is necessary to orient the corner cube prism toward the theodolite or the total station. Therefore, when a single corner cube prism is used as a target in the surveying work, it is necessary to adjust the direction of the corner cube prism each time the position where the theodolite or the total station is set is changed.

On the other hand, Patent Document 1 discloses a technique of a retroreflective device that is designed to be able to retroreflect light in a large angle range up to 360° in all directions by combining a plurality of corner cube prisms. Has been done. In this technique, eight right-angled triangular pyramid-shaped corner cube prisms are combined by bringing their reflecting surfaces into close contact with each other to form a substantially octahedral prism assembly, and a retroreflective device having such a prism assembly is configured. There is. According to this retroreflective device, it is possible to reduce the number of times of adjusting the direction of the corner cube prism in the surveying work, thereby reducing the complexity of the surveying work.

JP, 11-512176, A

In the above technique, when a plurality of right-angled triangular pyramid-shaped corner cube prisms are combined into a prism assembly, it is necessary to bring the reflecting surfaces of the corner cube prisms into close contact with each other. Therefore, when fixing the corner cube prisms, the corner cube prisms are often adhered to each other using an adhesive or the like. However, the retroreflective device may be placed in a high place where there is a risk of damage due to falling or a place where vibration is large, and some corner cube prisms may be missing or damaged due to falling or contact with other objects. Often damaged. If chips or scratches occur, the corner cube prism cannot perform satisfactory retroreflection.

If the corner cube prisms are chipped or damaged, if the corner cube prisms are adhered to each other, it is not easy to disassemble each corner cube prism independently, and as a result, the entire prism assembly must be replaced. There was a problem that it had to be.

Then, this invention solves the said subject, and an object of this invention is to provide the retroreflector which can fix a part of the corner cube prism which comprises a prism assembly so that it can be replaced freely.

According to one feature of the present disclosure, three reflective surfaces, each of which is a plane orthogonal to each other, and light incident on these reflective surfaces and retroreflective light reflected by the three reflective surfaces are transmitted. Corner cube prism having a light-transmitting surface, a prism assembly having a plurality of corner cube prisms, a set of a first member and a second member for realizing a sandwiched state in which the prism assembly is sandwiched, a first member and a second member And a first hole formed in the first member, a second hole formed in the second member, a first hole formed in the first member, and a second hole formed in the second member. A shaft part that is inserted into the hole part, a holding mechanism that holds the sandwiched state, and a rotation suppressing mechanism that suppresses relative rotation of the first member and the second member around the axis of the shaft part with respect to the shaft part. A retroreflective device having is provided.

According to this, the prism assembly is sandwiched by the set of the first member and the second member, and the sandwiched state is held by the holding mechanism. That is, the prism assembly can be fixed without fixing the corner cubes by bonding or the like. Therefore, by eliminating the holding of the holding mechanism, each of the corner cube prisms constituting the prism assembly can be independently replaced. Furthermore, since the first member and the second member have a rotation restraining mechanism that restrains the first member and the second member from rotating relative to the shaft portion around the shaft portion as a center, the prism. Torque (twisting moment) in the direction around the axis of the shaft can be suppressed in the assembly. Therefore, it is possible to prevent the prism assembly from being disassembled and fix the prism assembly without bonding.

According to another feature of the present disclosure, at least one of the corner cube prisms forming the prism assembly is provided with a proximity portion in which two of the three reflecting surfaces and a light transmitting surface are in close proximity to each other, The hooking portion is provided with one or more engaging pieces capable of being engaged with the proximity portion from the outside of the prism assembly toward the inside of the prism assembly. There is. According to this, when the holding by the holding mechanism is loose during the replacement work of the corner cube prism, the corner piece of the corner cube prism is prevented from unintentionally spilling by the engaging piece of the hooking portion, and thus the replacement work is performed. It is possible to improve the sex.

According to another feature of the disclosure, at least one of the engagement pieces does not contact the engaged state and a corner cube prism provided with a proximity portion engaged in the engaged state. It is configured to be able to switch between the saved state and the saved state. According to this, when the corner cube prism with which the engaging piece is engaged is to be replaced, by switching the engaging piece of the hooking portion to the retracted state, the engaging piece is made into the corner cube. You can avoid getting in the way of prism replacement work.

According to another feature of the present disclosure, all the engagement pieces are configured to be switchable between the engagement state and the retracted state. According to this, no matter which corner cube prism in the prism assembly is to be replaced, by switching the engaging piece at the position corresponding to the corner cube prism to be replaced to the retracted state, this engaging piece is turned into a corner cube. You can avoid getting in the way of prism replacement work.

According to another feature of the present disclosure, the rotation inhibiting mechanism has a detent structure that allows the first hole portion and the second hole portion and the surface of the shaft portion to be locked non-rotatably. Is established by. According to this, it is possible to prevent the first member and the second member from relatively rotating around the axis of the shaft portion. That is, with a relatively simple structure, the function as the rotation restraining mechanism can be achieved.

According to another feature of the present disclosure, the hooking portion has a frame which is positioned along the row of the corner cube prisms of the prism assembly and which can hook the ends of the corner cube prisms. According to this, since the hooking portions are arranged in alignment with the corner cube prisms forming the prism assembly, the function of suppressing the displacement of the prism assembly becomes more reliable.

According to another feature of the present disclosure, at least one of the first member and the second member is in contact with the reflecting surface of the corner cube prism, and thus the corner cube prism can be placed in a leaning state. A possible seat is provided. According to this, since it is possible to hang the reflecting surface of the corner cube prism on the seat portion, it becomes easy to fix the arrangement of the corner cube prism.

According to another feature of the present disclosure, the seat portion is provided with a groove portion into which an end side of the corner cube prism can be fitted. According to this, the edge side of the corner cube prism is fitted into the groove portion, so that the position of the corner cube prism is fixed in a more stable state.

According to another feature of the present disclosure, the shaft portion is formed in a long shape and has a tubular shape having a through hole penetrating from one end side to the other end side in the longitudinal direction thereof. According to this, the rod-shaped member can be inserted into the through hole of the shaft portion, and the retroreflective device can be slid along the rod-shaped member. That is, the position of the retroreflective device viewed in the longitudinal direction of the shaft portion can be changed via the rod-shaped member.

According to the retroreflective device of the present disclosure, each of the corner cube prisms included in the prism assembly can be independently replaced. Further, since the torque in the direction around the axis of the shaft portion with respect to the prism assembly can be suppressed, even if the corner cube prisms of the prism assembly are not adhered to each other, it is possible to fix them while suppressing disassembly. it can.

It is explanatory drawing which shows the use condition of the retroreflective device concerning 1st Embodiment. It is a front view of the retroreflective device concerning 1st Embodiment. It is a top view of the retroreflective device concerning 1st Embodiment. It is a bottom view of the retroreflective device concerning 1st Embodiment. FIG. 3 is a sectional view taken along the line XXIII-XXIII of FIG. 2. FIG. 3 is an exploded perspective view of the retroreflective device according to the first embodiment. It is a perspective view which shows the progress of the assembly of the retroreflective device concerning 1st Embodiment. It is a side view which shows the use condition of the retroreflective device concerning 2nd Embodiment. It is a perspective view of the retroreflective device concerning a 2nd embodiment. It is a disassembled perspective view of the retroreflective device concerning 2nd Embodiment. It is a perspective view of the 1st member (2nd member) concerning 2nd Embodiment. It is a top view of the 1st member (2nd member) concerning a 2nd embodiment. It is a perspective view of the axis part in the retroreflective device concerning a 2nd embodiment. It is a bottom view of the shaft part in the retroreflective device concerning a 2nd embodiment. FIG. 7 is a perspective view of a corner cube prism in the retroreflective device according to the second embodiment. FIG. 9 is a perspective view showing a state where six corner cube prisms are installed on a second member of the retroreflective device according to the second embodiment. FIG. 8 is a perspective view showing a state in which three corner cube prisms are installed on a second member of the retroreflective device according to the second embodiment. FIG. 9 is a side view showing a state where one corner cube prism is installed on a second member of the retroreflective device according to the second embodiment. FIG. 8 is a perspective view showing a state in which three corner cube prisms are installed on a second member of the retroreflective device according to the second embodiment. FIG. 9 is a side view showing a state where one corner cube prism is installed on a second member of the retroreflective device according to the second embodiment. FIG. 8 is an exploded side view showing a positional relationship between a corner cube prism and a shaft portion on a second member in the retroreflective device according to the second embodiment. It is a perspective view which shows the progress of the assembly of the retroreflective device concerning 2nd Embodiment. It is a perspective view which shows the progress of the assembly of the retroreflective device concerning 2nd Embodiment. It is a perspective view which shows the progress of the assembly of the retroreflective device concerning 2nd Embodiment. It is a perspective view which shows the modification of the retroreflective device which made the rod-shaped member penetrate.

(First embodiment)
First, the retroreflective device 100 according to the first embodiment will be described with reference to FIGS. 1 to 7. In the following, a part of the retroreflective device 100 is provided with a hole for loosening or tightening the screwing of another part to be combined with the part (for example, the holes 101, 104 shown in FIG. 5 are formed. The detailed description of ancillary structures such as the holes 102, 103, 105, and 106) is omitted.

As shown in FIG. 1, the retroreflective device 100 is a retroreflective device used for retroreflecting light oscillated by the total station 900 in a surveying operation using the total station 900. In this retroreflective device 100, a prism assembly 130 that realizes retroreflection of light is vertically arranged by a first member 110 located above the prism assembly 130 and a second member 120 located below the prism assembly 130. It has a configuration sandwiched between. In other words, in the retroreflective device 100, the set of the first member 110 and the second member 120 realizes the sandwiched state in which the prism assembly 130 is sandwiched from the vertical direction.

The first member 110 and the second member 120 are fitted in the casing 101 and the casing 104, respectively, as shown in FIGS. 1, 2, and 5. In addition, as shown in FIGS. 5 and 6, the first member 110 and the second member 120 respectively include a plastic frame 114 and a main body 111 and 121 formed by cutting a thick steel plate cut out. , 124 are integrated.

In the present embodiment, as shown in FIG. 5, the main bodies 111 and 121 have a configuration in which cylindrical bosses 112 and 122 are respectively projected from the plate surface on one side. In addition, the frames 114 and 124 are integrated with the main bodies 111 and 121 by fitting the inner peripheral surfaces of the frames 114 and 124 to the outer peripheral surfaces of the bosses 112 and 122, respectively. However, the first member and the second member may be formed by integrally molding the main body and the frame, and the main body and the frame may be made of the same material.

In addition, as shown in FIG. 5, the main bodies 111 and 121 are respectively formed with a first hole portion 113 and a second hole portion 113 which are formed so as to penetrate the bosses 112 and 122 in the protruding direction (vertical direction in FIG. 5), respectively. It has a configuration including a hole 123. The first hole portion 113 and the second hole portion 123 are configured to penetrate the main bodies 111 and 121, respectively. Further, the ends of the shaft portion 140 are inserted into the first hole portion 113 and the second hole portion 123, respectively, so that the main bodies 111 and 121 are connected to each other by the shaft portion 140.

As shown in FIGS. 5 to 7, the shaft portion 140 has a dent 141 formed as a suspension surface near the midpoint between both ends thereof, and both sides of the dent 141 viewed in the direction in which the shaft portion 140 extends. And a barb 142 that is sandwiched from both sides (upper and lower sides as viewed in FIG. 5). These barbs 142 engage with the boss 112 or the boss 122 having the shaft portion 140 when the end of the shaft portion 140 is inserted into the first hole portion 113 or the second hole portion 123, and thus the main body 111 of the shaft portion 140. Alternatively, the insertion depth with respect to the main body 121 is specified. In the present embodiment, the barb 142 is configured such that the plate surface on the other side of the main body 111, 121 opposite to the side on which the bosses 112, 122 are projected and the end of the shaft portion 140 are flush with each other. The insertion depth is specified.

Here, the connection between the main bodies 111 and 121 by the shaft portion 140 described above is held by the holding mechanism 150, as shown in FIG. The holding mechanism 150 includes a screw 152 for screwing the main body 111, 121 of the first member 110 or the second member 120 to the casing 101 or the casing 104. In addition, the holding mechanism 150 is screwed into the screw holes 143 formed at both ends of the shaft portion 140, and the head projecting from the screw holes 143 has a head portion at the end of the shaft portion 140 and the other side plate of the main bodies 111 and 121. A flange bolt 151 for locking the surface is provided. As a result, the holding mechanism 150 realizes holding of the sandwiched state in which the pair of the first member 110 and the second member 120 sandwiches the prism assembly 130.

Further, in the state where the holding state is held by the holding mechanism 150, relative rotation of the first member 110 and the second member 120 with respect to the shaft portion 140 about the axis line of the shaft portion 140 is as shown in FIGS. It is restrained by the rotation restraining mechanism 160 shown in FIG. This rotation restraint mechanism 160 has a part of the surface facing the first hole 113 or the second hole 123 at each end of the shaft 140 inserted into the first hole 113 or the second hole 123. Is provided as a flat surface. In addition, the rotation restraint mechanism 160 penetrates the main body 111 or the main body 121 from the face of the thick plate of steel constituting the main body 111 to the inner surface of the first hole 113 or the second hole 123. The screw hole 161 is formed. Further, the rotation restraining mechanism 160 is provided with a female screw 162 that can be inserted into the screw hole 161 and screwed into the screw hole 161, and the tip of the screw can be locked to the flattening 163 provided on the shaft portion 140. As a result, the rotation restraining mechanism 160 realizes a rotation preventing structure that allows the first hole 113 or the second hole 123 and the surface of the shaft 140 to be locked non-rotatably. The relative rotation of the 1st member 110 and the 2nd member 120 is suppressed.

In the present embodiment, the female screw 162 is screwed into the screw hole 161 in a state where the whole is inserted into the screw hole 161, and the tip of the female screw 162 is brought into surface contact with the flattening 163 to make the flat screw 163. A flat tip enameled set screw that can be locked to the handle 163.

As shown in FIG. 7, the prism assembly 130 has a configuration in which six corner cube prisms 131 each formed in a substantially right-angled triangular pyramid shape are arranged and combined so as to form a ring surrounding the shaft portion 140. Here, the prism assembly 130 has a shape that looks like a regular octahedron in a side view (see FIG. 2) by arranging the corner cube prisms 131 in a staggered manner. Further, the barb 142 of the shaft portion 140 has a truncated cone shape with a small diameter on the side of the recess 141, so that interference with the corner cube prism 131 forming the prism assembly 130 is avoided.

As shown in FIGS. 6 and 7, the corner cube prism 131 has three planes orthogonal to each other in its substantially right-angled triangular pyramid as reflecting surfaces 132, and the remaining planes as light transmitting surfaces 133. Therefore, in the corner cube prism 131, the light transmitting surface 133 has a substantially equilateral triangular shape, and the three corners thereof are adjacent portions where the light transmitting surface 133 and two of the three reflecting surfaces 132 are close to each other. 134 (see FIG. 7).

Here, the three reflecting surfaces 132 realize retroreflection of the incident light. Further, the light transmitting surface 133 transmits the light incident on the three reflecting surfaces 132 and the retroreflected light obtained by reflecting the light on the three reflecting surfaces 132. However, in the proximity portion 134, retroreflection of light and transmission of retroreflected light are hardly performed.

As shown in FIGS. 3, 4, and 7, the frames 114 and 124 each have a substantially equilateral triangle shape, and each side of the substantially equilateral triangle forms a prism assembly 130. It is located along. As a result, the frames 114 and 124 can be set in a state where the corner cube prisms 131 forming the prism assembly 130 are assembled. Further, each vertex of the substantially equilateral triangles of the frames 114 and 124 is, when viewed from either one end side or the other end side of the shaft portion 140, a frame 124 facing the frame 114 or 124 to which the vertex belongs, It is exposed without being obscured by 114.

Further, as shown in FIG. 5, the frames 114 and 124 are respectively in contact with the reflecting surface 132 of the corner cube prism 131, so that the corner cube prism 131 can be put on the seat portion 115. , 125. These seats 115 and 125 have a substantially pyramidal shape protruding at corners of the substantially equilateral triangles of the frames 114 and 124, and two side surfaces of the substantially pyramid shape have substantially equilateral triangles of the frames 114 and 124. Are arranged along two sides. Further, the seat portions 115 and 125 can be configured such that the reflection surfaces 132 of the corner cube prisms 131 set on the frames 114 and 124 (see FIG. 7) can be placed on the respective side surfaces.

Further, as shown in FIG. 7, in the portions of the seat portions 115 and 125 sandwiched by the side surfaces on which the corner cube prism 131 is placed, as shown in FIG. 7, the end sides that are the sides where the two reflecting surfaces 132 intersect with each other. A groove portion (see groove portions 116 and 126 in FIG. 5) into which the 135 can be fitted is provided.

By the way, the displacement of the prism assembly 130 including the corner cube prisms 131 set in the frames 114 and 124 is suppressed by the hooking portion 200 shown in FIGS. 3 to 5. The hooking portion 200 is configured such that engaging pieces 210 that can be engaged with the proximity portion 134 of the corner cube prism 131 are attached to each of three apexes of the substantially equilateral triangles of the frames 114 and 124.

Here, the frames 114 and 124 exhibit a function as a part of the hooking portion 200 by hooking the end 136 that forms the side of the light transmitting surface 133 of the corner cube prism 131 (see FIG. 7 ). Further, the engagement piece 210 includes a strip-shaped contact surface 211 that is in contact with the light transmitting surface 133 in the proximity portion 134 of the corner cube prism 131 set on the frames 114 and 124. All of these are configured to realize an engaged state in which the prism assembly 130 is engaged from the outside of the prism assembly 130 toward the inside of the prism assembly 130, and the displacement of the prism assembly 130 is suppressed. Contribute.

In this embodiment, as shown in FIGS. 3 and 4, the engagement piece 210 has a chamfered portion 212 in which the end of the contact surface 211 is chamfered (see FIG. 6) for wide chamfering. There is. The chamfered portion 212 transmits the light to the proximity portion 134 of the corner cube prism 131 adjacent to the corner cube prism 131 when the contact surface 211 contacts the light transmission surface 133 at the proximity portion 134 of the corner cube prism 131. Engage from the direction along surface 133.

Further, in this embodiment, as shown in FIGS. 3 to 5, all the engaging pieces 210 are attached to the frames 114 and 124 via the screws 201. Therefore, the engaging piece 210 is retracted by removing and attaching the screw 201 so as not to come into contact with the above-mentioned engaged state and the corner cube prism 131 provided with the proximity portion 134 engaged in this engaged state. It is possible to switch between the evacuation state and the evacuation state. In this retracted state, the engagement piece 210 and the screw 201 are separated from the frames 114 and 124, as shown by the phantom line in FIG.

According to the retroreflective device 100 described above, the prism assembly 130 is sandwiched between the set of the first member 110 and the second member 120, and this sandwiched state is retained by the retaining mechanism 150. That is, the prism assembly 130 can be fixed even if the individual corner cube prisms 131 forming the prism assembly 130 are not fixed to each other by adhesion or the like. Therefore, by eliminating the holding of the holding mechanism 150, each of the corner cube prisms 131 forming the prism assembly 130 can be independently replaced.

Further, the retroreflective device 100 described above includes the rotation restraining mechanism 160 that restrains the first member 110 and the second member 120 from rotating relative to the shaft portion 140. More specifically, in the retroreflective device 100, the rotation restraint that restrains the first member 110 and the second member 120 from relatively rotating about the shaft 140 about the axis of the shaft 140. It has a mechanism 160. Therefore, the retroreflective device 100 suppresses the torque (torsion moment) in the direction around the axis of the shaft portion 140 from acting on the prism assembly 130, and thus prevents the prism assembly 130 from being disassembled regardless of adhesion. The lever prism assembly 130 can be fixed.

Further, according to the above-described retroreflective device 100, the rotation suppressing mechanism 160 has the rotation preventing structure so that the first member 110 and the second member 120 are relatively rotated about the axis of the shaft portion 140. Can be deterred. That is, the rotation restraint mechanism 160 can fulfill its function by a relatively simple detent structure.

Further, according to the retroreflective device 100 described above, when the holding by the holding mechanism 150 is loose during the replacement work of the corner cube prism 131, it is possible to prevent the corner cube prism 131 from unintentionally spilling. This can be suppressed by the joint piece 210, and thus the workability of this replacement work can be improved.

Further, according to the retroreflective device 100 described above, when the corner cube prism 131 with which the engaging piece 210 is engaged is the target of replacement, the engaging piece 210 of the hooking portion 200 is switched to the retracted state. As a result, the engagement piece 210 can be prevented from interfering with the replacement work of the corner cube prism 131.

Further, according to the retroreflective device 100 described above, no matter which corner cube prism 131 in the prism assembly 130 is replaced, the engagement piece 210 at the position corresponding to the corner cube prism 131 to be replaced is retracted. By switching, the engagement piece 210 can be prevented from interfering with the replacement work of the corner cube prism 131.

Further, according to the retroreflective device 100 described above, since the hook portions 200 are arranged in alignment with the corner cube prisms 131 forming the prism assembly 130, the function of suppressing the positional deviation of the prism assembly 130 is more reliable. Become.

Further, according to the retroreflective device 100 described above, it is possible to hang the reflecting surfaces 132 of the corner cube prisms 131 on the seat portions 115 and 125, so that the arrangement of the corner cube prisms 131 can be easily fixed.

Further, according to the above-described retroreflective device 100, the edge side 135 of the corner cube prism 131 is fitted into the groove portions 116 and 126, so that the position of the corner cube prism 131 is fixed in a more stable state.

Further, according to the retroreflective device 100 described above, the apexes of the substantially equilateral triangles of the frames 114 and 124, to which the engagement piece 210 of the hooking portion 200 is attached via the screw 201, are not visible when viewed from at least one direction. The frames 124, 114 opposed to the frames 114, 124 to which this vertex belongs are exposed without being covered by the frames 124, 114. As a result, a driver (not shown) for attaching/detaching the screw 201 and the frame 114 or the frame 124 in the work of switching the engagement state and the retracted state of the engagement piece 210 by attaching/detaching the screw 201. It is possible to reduce the interference between the two and improve the workability of the work for switching.

(Second embodiment)
Subsequently, the retroreflective device 1 according to the second embodiment will be described with reference to FIGS. 8 to 21. This retroreflective device 1 is used as a target of the total station 40, as shown in FIG. The retroreflective device 1 installed at the target coordinates retroreflects the light beam (see the broken line in the figure) oscillated from the total station 40. That is, by measuring the time/direction at which the light rays are oscillated from the total station 40 and the time/direction at which the total station 40 receives the light rays retroreflected from the retroreflective device 1, up to the target point where the retroreflective device 1 is installed. It is possible to measure the distance or direction of and to perform geodetic and surveying. In addition, below, the upper and lower sides of each component in the retroreflective device 1 are described by the upper and lower sides when the retroreflective device 1 is in the state shown in FIG. 8.

As shown in FIGS. 9 and 10, the retroreflective device 1 includes a first member 2, a second member 3, a prism assembly 4 including six corner cube prisms 6, a shaft portion 5, and a fastener. It consists of 7. As shown in FIGS. 11 and 12, the first member 2 and the second member 3 have the same shape and realize the holding state in which the prism assembly 4 is sandwiched. Hereinafter, the details of the second member 3 will be described, and the description of the first member 2 will also be provided.

As shown in FIGS. 11 and 12, the second member 3 (first member 2) includes a seat plate 10 and a seat portion 20 for sandwiching. The seat plate 10 has one surface 11 facing the prism assembly 4 (see FIGS. 9 and 10), the same shape as the upper surface, the other surface 12 provided on the opposite side of the one surface, the one surface 11 and the other surface. It has a side wall 13 connecting the directions 12. That is, the seat plate 10 is formed in a substantially triangular prism shape. The one surface 11 is provided with hook portions 3b (2b) at three locations along each side of the substantially triangular shape. The hook portion 3b (2b) is formed in a groove shape that is recessed toward the other surface 12 side in comparison with the one surface 11.

As shown in FIGS. 11 and 12, the seat portion 20 is formed so as to project upward from the vicinity of the center of the seat plate 10. The seat portion 20 is formed in a substantially triangular shape which is similar to the shape of the seat plate 10 in a plan view in a plan view. A second hole portion 3a (first hole portion 2a) is formed in the center of the seat portion 20 so as to penetrate both the seat plate 10 and the seat portion 20. The inner shape of the second hole portion 3a (first hole portion 2a) is such that both ends of a circle are flattened. Further, grooves 21 are provided in three radial directions from the second hole 3a (first hole 2a). The upper end of the seat 20 is provided with three inclined surfaces 22 that incline downward from above.

As shown in FIGS. 9 and 10, the shaft portion 5 includes a first hole portion 2a (see FIGS. 11 and 12) in the first member 2 and a second hole portion 3a (see FIGS. 11 and 12) in the second member 3. (See) is a shaft-like member used by being inserted into both. As shown in FIGS. 13 and 14, the shaft portion 5 has a first locking portion 5a, a second locking portion 5b, a shaft tail portion 5c, a shaft head portion 5d, and a central portion 5e. The first locking portion 5a and the second locking portion 5b are shaped so as to have a flattened side surface of a column. That is, the cross-sectional shapes of the first locking portion 5a and the second locking portion 5b are the same as the above-described first hole portion 2a of the first member 2 (see FIGS. 11 and 12) and the second hole of the second member 3. It is designed to have substantially the same internal shape as the portion 3a (see FIGS. 11 and 12). The central portion 5e is formed in a cylindrical shape having a diameter smaller than the diameters of the first locking portion 5a and the second locking portion 5b. The shaft head portion 5d is formed in a disk shape having a larger diameter than the first locking portion 5a and the second locking portion 5b. The stem portion 5c is formed in a cylindrical shape having a diameter smaller than the diameters of the first locking portion 5a and the second locking portion 5b, and its outer shape is almost the same as the inner shape of the fastener 7 (see FIG. 10). is there.

As shown in FIGS. 9 and 10, the prism assembly 4 sandwiched between the first member 2 and the second member 3 is composed of six corner cube prisms 6. As shown in FIG. 15, the corner cube prism 6 is formed in a substantially right triangular pyramid shape. Specifically, it has three substantially triangular triangular end surfaces 6a and a substantially equilateral triangular retroreflective surface 6c. A first end side 6b is set on the side located at the boundary between the end surfaces 6a. A second end side 6d is set for the side located at the boundary between the end surface 6a and the retroreflective surface 6c. The second edge 6d has a chamfered shape. Further, each corner of the substantially right-angled triangular pyramid-shaped corner cube prism 6 is provided with a chamfered end portion 6e. The first edge 6b corresponds to the "edge" in the present invention. The three end surfaces 6a are three reflecting surfaces that are planes orthogonal to each other. The retroreflective surface 6c is a surface that transmits the light incident on the three end surfaces 6a and the retroreflected light reflected by the three end surfaces 6a, and corresponds to the "light transmitting surface" in the present invention. ..

Next, the arrangement of the corner cube prisms 6 and the positional relationship with other members will be described with reference to FIGS. 16 to 21. As shown in FIG. 16, the six corner cube prisms 6 are arranged alternately with the end faces 6a in contact with each other with the retroreflective surface 6c facing outward. That is, as shown in FIG. 17, the three corner cube prisms 6 are installed with one end 6e facing upward. The set of these three corner cube prisms 6 is tentatively referred to as a first corner cube prism set 8. As shown in FIG. 19, the remaining three corner cube prisms 6 are installed with one end 6e facing downward. The set of the remaining three corner cube prisms 6 is referred to as a second corner cube prism set 9.

As shown in FIG. 18, the positions of the three corner cube prisms 6 forming the first corner cube prism set 8 are fixed by the seat plate 10 and the seat portion 20 of the second member 3. Specifically, the second end 6d of the corner cube prism 6 is hooked on the hooking portion 3b. Further, the end surface 6a of the corner cube prism 6 is also leaned against the inclined surface 22 of the seat 20. That is, the corner cube prisms 6 forming the first corner cube prism set 8 are fixed by one of the hook portions 3b of the second member 3 and one of the inclined surfaces 22.

As shown in FIG. 19, the positions of the three corner cube prisms 6 forming the second corner cube prism set 9 are fixed by the seat portion 20 of the second member 3. Specifically, as shown in FIG. 20, the first end side 6 b of the corner cube prism 6 is leaned against even if it is fitted into the groove portion 21 of the seat portion 20. Further, the end surface 6a of the corner cube prism 6 forming the second corner cube prism set 9 contacts the end surface 6a (see FIG. 17) of the corner cube prism 6 forming the first corner cube prism set 8. As a result, the relative position of the corner cube prism 6 with respect to the second member 3 is fixed.

The positional relationship between the second member 3 and the corner cube prism 6 (see FIGS. 18 and 20) described above also applies to the positional relationship between the first member 2 and the corner cube prism 6. For example, the first end side 6b of the corner cube prism 6 of the first corner cube prism set 8 is leaned against even if it is fitted into the groove portion 21 (see FIGS. 11 and 12) in the seat portion 20 of the first member 2. The second end side 6d of the corner cube prism 6 of the second corner cube prism set 9 is hooked on the hook portion 2b (see FIGS. 11 and 12). Further, the end surface 6a of the corner cube prism 6 is also placed on the inclined surface 22 (see FIGS. 11 and 12) of the seat portion 20 of the first member 2.

Next, the positional relationship between the corner cube prism 6 and the shaft portion 5 will be described with reference to FIG. As shown in FIG. 21, the shaft portion 5, the second member 3, and the corner cube prism 6 are designed so that the central portion 5e of the shaft portion 5 is located at a position facing the end portion 6e of the corner cube prism 6. .. Here, the central portion 5e of the shaft portion 5 is set to have a smaller diameter than the first locking portion 5a and the second locking portion 5b. Further, the end 6e of the corner cube prism 6 is chamfered. As a result, the end portion 6e of the corner cube prism 6 and the central portion 5e of the shaft portion 5 are prevented from overlapping each other. Therefore, the shaft portion 5 and the corner cube prism 6 can be easily installed at desired positions.

Next, the assembly process of this embodiment will be described with reference to FIGS. 22 to 24. As shown in FIG. 22, the first member 2 has a first hole portion 2a (see FIGS. 11 and 12) and a second member 3 has a second hole portion 3a (see FIGS. 11 and 12) that is axially aligned with the shaft. The part 5 is inserted. At this time, the distance L between the first member 2 and the second member 3 is set to be longer than that when the prism assembly 4 is actually fixed so that the distance L does not come off from the second hole portion 3a of the second member 3. ..

Subsequently, the prism assembly 4 (see FIG. 16) is installed. As shown in FIG. 23, the first corner cube prism set 8 is installed on the second member 3. Specifically, the retroreflective surface 6c of the corner cube prism 6 is directed outward, the second end side 6d (see FIG. 15) is engaged with the engaging portion 3b, and the first end side 6b (see FIG. 15) is applied. It also leans against the inclined surface 22 (see FIG. 22). As a result, the corner cube prisms 6 forming the first corner cube prism set 8 are installed at the target positions on the second member 3.

Then, as shown in FIG. 24, the 2nd corner cube prism group 9 is installed. Specifically, with the retroreflective surface 6c of the corner cube prism 6 forming the second corner cube prism set 9 facing outward, the end face 6a of the corner cube prism 6 forming the first corner cube prism set 8 (see FIG. 15). ) And the end surface 6a (see FIG. 15) of the corner cube prism 6 that constitutes the second corner cube prism set 9 are brought into contact with each other. Further, the first end side 6b (see FIG. 15) of the corner cube prism 6 forming the second corner cube prism set 9 is fitted into the groove portion 21 (see FIG. 23) of the seat portion 20. As a result, the prism assembly 4 including the first corner cube prism set 8 and the second corner cube prism set 9 is installed at the target position on the second member 3.

As shown in FIG. 24, by sliding the first member 2 along the shaft portion 5 in the direction in which the first member 2 approaches the second member 3 (the direction of arrow A), the prism assembly 4 is moved to the first member. It is sandwiched by a set of 2 and the second member 3. Then, as shown by the arrow B, the fastener 7 is fitted into the tail portion 5c (see FIG. 13) of the shaft portion 5 and fixed. As a result, the positions of the first member 2 and the second member 3 sandwiched by the shaft head 5d of the shaft portion 5 and the fastener 7 are held, and the prism assembly 4 is sandwiched by the first member 2 and the second member 3. Be held.

According to the above embodiment, as shown in FIG. 9, the prism assembly 4 is sandwiched by the set of the first member 2 and the second member 3. The first member 2 and the second member 3 are held by the shaft head portion 5d (see FIG. 13) of the shaft portion 5 and the fastener 7 (see FIG. 10). That is, the prism assembly 4 having the plurality of corner cube prisms 6 can be fixed without fixing the corner cubes 6 by bonding or the like. Therefore, each of the corner cube prisms 6 forming the prism assembly 4 can be independently replaced.

The surface shapes of the first locking portion 5a and the second locking portion 5b of the shaft portion 5 shown in FIGS. 13 and 14 are the same as those of the first member 2 (second member) shown in FIGS. 11 and 12, respectively. The internal shape of the first hole 2a (second hole 3a) of 3) is designed to be substantially the same as that of the first hole 2a so that they can be locked non-rotatably with each other. Therefore, as shown in FIGS. 9 and 10, the first member 2 and the second member 3 are capable of rotating relative to the shaft portion 5 about the shaft portion 5 relative to the shaft portion 5. It is established as a rotation restraint mechanism that restrains. Therefore, torque (torsion moment) in the direction around the axis of the shaft 5 does not act on the prism assembly 4. That is, when held by the first member 2 and the second member 3, the prism assembly 4 can be prevented from being disassembled without bonding.

Further, in the present embodiment, as shown in FIGS. 11 and 12, the hook portions 3b are positioned along the corner cube prisms 6 forming the prism assembly 4. Further, the hooking portion 3b is formed in a shape having a frame capable of hooking the end portion 6e (see FIG. 16) of the corner cube prism 6. According to this, since the hook portions 3b are arranged in alignment with the corner cube prisms 6 forming the prism assembly 4 (see FIG. 16), the function of suppressing the displacement of the prism assembly 4 becomes more reliable.

Further, in the present embodiment, the seat portion 20 is provided on which the first end 2b or the end face 6a of the corner cube prism can be hung on the first member 2 and the second member 3. This makes it easier to fix the arrangement of the corner cube prism 6.

Further, in the present embodiment, as shown in FIGS. 11 and 12, the seat portion 20 of the first member 2 and the second member 3 is provided with the groove portion 21 into which the first end side 6b of the corner cube prism 6 can be fitted. There is. According to this, the position of the corner cube prism 6 is more stably fixed by fitting the first end side 6b of the corner cube prism 6 into the groove portion 21.

(Other embodiments)
The present disclosure is not limited to the embodiments described above with reference to FIGS. 1 to 24, and various changes, additions, and deletions can be made without changing the gist of the present disclosure. For example, the following various modes can be implemented.

(1) In the retroreflective device 100 according to the first embodiment, the holding mechanism 150 is a mechanism that fixes the main bodies 111 and 121 of the first member 110 or the second member 120 using the flange bolt 151 and the screw 152. is there. Further, in the retroreflective device 1 according to the second embodiment, the holding mechanism that holds the first member 2 and the second member 3 is a mechanism that is sandwiched by the shaft head 5d of the shaft portion 5 and the fastener 7. .. However, in the present disclosure including the first embodiment and the second embodiment described above (hereinafter, also simply referred to as “the present disclosure”), the holding mechanism of the retroreflective device includes the first member 2 and the second member. Any mechanism may be used as long as it is a holding mechanism that holds the state in which the prism assembly is held. For example, as the holding mechanism of the present disclosure, a mechanism that fixes the first hole portion (second hole portion) and the shaft portion of the first member (second member) by a rod-shaped retainer that penetrates in the radial direction is conceivable. ..

(2) In the retroreflective device 100 according to the first embodiment, the rotation restraining mechanism 160 causes the female screw 162 to engage with the flattening 163 provided on the shaft portion 140, so that the first hole portion 113 or the first hole portion 113 is formed. Each of the two hole portions 123 and the surface of the shaft portion 140 is a rotation stopper that allows the rotation of the shaft portion 140 to be locked in a non-rotatable manner. The female screw 162 is screwed into the screw hole 161 in a state where the whole is inserted in the screw hole 161, and the tip of the female screw 162 is brought into surface contact with the flat face 163 to be locked in the flat face 163. It is a flat end enameled set screw that can be used. Further, in the retroreflective device 1 according to the second embodiment, the cross-sectional shapes of the first locking portion 5a and the second locking portion 5b of the shaft portion 5 are the same as the first member 2 (second member 3). The inner shape of the first hole portion 2a (second hole portion 3a) is designed to be substantially the same. As a result, in the retroreflective device 1, it is possible to prevent the shaft portion 5 from rotating relatively to the first member 2 and the second member 3, and to use the shaft portion 5 as a rotation axis with respect to the shaft portion 5. A rotation suppressing mechanism that suppresses relative rotation around the shaft portion 5 is established.

However, the rotation restraint mechanism in the present disclosure restrains relative rotation of the first member and the second member around the shaft portion with respect to the shaft portion with the shaft portion as a rotation axis, that is, the rotation inhibition mechanism. Any technical idea may be used as long as it can be stopped. For example, in the rotation restraint mechanism of the present disclosure, it is possible to apply the technical idea of the second embodiment to the first embodiment or vice versa.

When the technical idea of the second embodiment is applied to the rotation restraint mechanism, for example, the cross-sectional shape of the shaft portion is an a-fold symmetrical figure with respect to a finite natural number a, and the inner shape and the first shape of the first hole portion of the first member are By making the inner shapes of the second holes of the two members be the same, the first member and the second member can rotate relatively to the shaft portion around the shaft portion with the shaft portion as a rotation axis. Can be suppressed. Examples of the a-fold symmetrical figure with respect to the finite natural number a include polygons, ellipses, and figures having line symmetry.

Here, when the cross-sectional shape of the shaft portion is an a-fold symmetrical figure with respect to a finite natural number a, the inner shape of the first hole portion of the first member and the inner shape of the second hole portion of the second member are not necessarily the same shape. You don't have to. That is, it suffices if the first member and the second member can be prevented from rotating relative to the shaft portion around the shaft portion with the shaft portion as the rotation axis. For example, the shape of the first hole and the second hole is hexagonal, the cross-sectional shape of the shaft is square, and the shaft is fitted in the first hole and the second hole and does not rotate. Can also be

Further, regardless of the cross-sectional shape of the shaft portion, for example, a ring-shaped elastic member is provided in the first hole portion of the first member and in the second hole portion of the second member, with respect to the first hole portion and the second hole portion. , A structure that press-fits the shaft portion to prevent the first member and the second member from relatively rotating around the shaft portion with the shaft portion as a rotation axis is adopted as a rotation restraining mechanism in the retroreflective device. You can also

When the technical idea of the first embodiment is applied to the rotation restraint mechanism, for example, the tip of the female screw can be locked so as to bite into the curved surface of the shaft portion, and the shaft portion serves as a recess. The flattening can be omitted. Or, for example, change the female thread to any type of screw that can be screwed into the threaded hole with the entire thread inside the threaded hole, such as a full thread such as a long thread or a stud bolt. can do. Alternatively, for example, the female screw may be a screw having a head portion having a diameter larger than that of the screw hole, and the head portion may be protruded from the body face of the main body.

(3) In each embodiment of the retroreflective device of the present disclosure, the technical idea regarding the engaging piece of the above-described first embodiment can be applied. When this technical idea is applied to the present disclosure, for example, the screw that attaches the engagement piece to the frame can be changed to any attachment structure such as a snap button or a snap lock or a toggle latch. Alternatively, the engagement piece can be switched between the engaged state and the retracted state by attaching the engagement piece to the frame via the slide rail and sliding the engagement piece on the slide rail. In this case, the slide rail can be a straight line or an arbitrary curved line, and its installation direction can be set appropriately. Further, the engaging piece may or may not be separated from the slide rail and the frame in the retracted state.

Alternatively, by providing one of the engaging piece and the frame with a portion that also functions as a clip for grasping the other, the engaging piece can be attached to and detached from the frame so as to switch between the engaged state and the retracted state. Can be possible. Alternatively, one of the engaging piece and the frame is provided with a portion that functions as a magnet, and the other is provided with a portion that also functions as a magnet or a ferromagnetic material, so that the engaging piece can be magnetically attached to and detached from the frame. Therefore, it is possible to switch between the engaged state and the retracted state.

Alternatively, for example, a member that is removed from the frame when the engaging piece is in the retracted state is connected to the frame with a leash cord, and thus a member that is separated from the frame when the engaging piece is in the retracted state can be eliminated. .. Here, specifically, the "member removed from the frame" includes, for example, the engaging piece itself or a fastener for attaching the engaging piece to the frame. Alternatively, for example, a part of the engaging piece may be integrated with the frame so that the engaging piece cannot be switched between the engaged state and the retracted state. In this case, even if the engaging piece and the frame formed separately from each other are fixed to each other, the engaging piece and the frame are integrally formed with each other. It may be.

(4) In each of the embodiments of the retroreflective device of the present disclosure, a technical idea is adopted in which the shaft portion has a long tubular shape having a through hole penetrating from one end side to the other end side in the longitudinal direction. can do. According to this technical idea, by inserting the rod-shaped member into the through hole of the shaft portion, the retroreflective device is slid along the rod-shaped member, thereby changing the position of the retroreflective device viewed in the longitudinal direction of the shaft portion. can do.

For example, when the above technical idea is applied to the above-described second embodiment, as in the retroreflective device 50 according to the modified example shown in FIG. 25, its shaft portion 51 is formed long and its longitudinal direction. It is possible to obtain an embodiment having a cylindrical shape having a through hole 51f penetrating from one end side to the other end side. According to this, the rod-shaped member 60 can be inserted into the through hole 51f of the shaft portion, and the retroreflective device 50 can be slid along the rod-shaped member 60. That is, the position of the retroreflective device 50 viewed in the longitudinal direction of the shaft portion 51 can be changed via the rod-shaped member 60. In the retroreflective device 50 shown in FIG. 25, the first member 2, the second member 3 and the corner cube prism 6 are the first members in the retroreflective device 1 according to the second embodiment shown in FIG. 9, respectively. Since they are the same parts as 2, 2, the third member 3 and the corner cube prism 6, the same reference numerals are given to them and their detailed description is omitted.

(5) In each embodiment of the retroreflective device of the present disclosure, the reflecting surfaces of the corner cube prisms that form the prism assembly may be in direct contact with each other. However, in the present disclosure, the prism assembly may be provided with a member or material that is sandwiched between the corner cube prisms if the retroreflecting surface of the corner cube prism is directed outward and retroreflection is possible. For example, a coating may be formed on the reflecting surface of the corner cube prism to facilitate retroreflection.

(6) In the present disclosure, the prism assembly may be one in which some of the corner cube prisms forming the prism assembly are replaced with members other than the corner cube prism that do not retroreflect. The "non-retroreflecting member" may include, for example, an opaque plastic member having a shape corresponding to a corner cube prism.

(7) In the present disclosure, the shape of the frame of the hooking portion may be any shape as long as it can prevent the displacement of the prism assembly.

(8) In the above-described first and second embodiments, the retroreflective device is provided for retroreflecting the light oscillated by the total station. However, the use of the retroreflective device according to the present disclosure Is not limited to this. For example, the retroreflective device can be used to retroreflect light oscillated from a position where the theodolite is set to cause the theodolite to measure and thereby obtain data that contributes to surveying.

1 Retroreflector 2 1st member 2a 1st hole 2b latching part 3 2nd member 3a 2nd hole 3b latching part 4 prism assembly 5 shaft part 5a 1st locking part 5b 2nd locking part 5c axis Tail portion 5d Shaft head portion 5e Central portion 6 Corner cube prism 6a End face 6b First end side (end side)
6c Retroreflective surface 6d Second edge 6e End 7 Fastener 8 First corner cube prism set 9 Second corner cube prism set 10 Seat plate 11 One side 12 Other side 13 Side wall 20 Seat 21 Groove 22 Slope 40 Total station 50 Retroreflective Device 51 Shaft 51f Through Hole 60 Rod Member 100 Retroreflective Device 101 Case 102 Hole 103 Hole 104 Case 105 Hole 106 Hole 110 First Member 111 Main Body 112 Boss 113 First Hole 114 Frame 115 Seat 116 Groove portion 120 Second member 121 Main body 122 Boss 123 Second hole portion 124 Frame 125 Seat portion 126 Groove portion 130 Prism assembly 131 Corner cube prism 132 Reflecting surface 133 Light transmitting surface 134 Proximity portion 135 End side 136 End portion 140 Shaft portion 141 Indentation 142 Barp 143 Screw hole 150 Holding mechanism 151 Flange bolt 152 Screw 160 Rotation suppression mechanism 161 Screw hole 162 and female screw 163 Flattening 200 Hooking portion 201 Screw 210 Engaging piece 211 Contact surface 212 Chamfering portion 900 Total station A Arrow B Arrow L Distance

Claims (8)

A corner cube prism having three reflecting surfaces each of which is a plane orthogonal to each other, and a light transmitting surface for transmitting light incident on these reflecting surfaces and retroreflected light reflected by the three reflecting surfaces. When,
A prism assembly having a plurality of the corner cube prisms,
A set of a first member and a second member that realizes a sandwiched state of sandwiching the prism assembly;
A hooking portion which is provided on each of the first member and the second member and holds down the positional displacement of the prism assembly;
A first hole formed in the first member;
A second hole formed in the second member;
A shaft part that is inserted into the first hole part and the second hole part;
A holding mechanism for holding the sandwiched state,
With respect to the shaft portion, it possesses a rotation inhibiting mechanism for inhibiting said first member and said second member, relative rotation about the axis of the shaft portion,
At least one of the corner cube prisms forming the prism assembly is provided with a proximity portion in which two of the three reflecting surfaces and a light transmitting surface are in close proximity to each other,
One or more engaging pieces that can be brought into an engaging state in which the engaging portion is engaged with the proximity portion from the outside of the prism assembly toward the inside of the prism assembly. A retroreflective device provided. The retroreflective device according to claim 1 , wherein
At least one of the engaging pieces has an engaged state and a retracted state that is retracted so as not to contact the corner cube prism provided with the proximity portion engaged in the engaged state. A retroreflective device that is configured to be switchable. The retroreflective device according to claim 2 , wherein
A retroreflective device in which all the engaging pieces are configured to be capable of switching between the engaged state and the retracted state. A retroreflective device according to any one of claims 1 to 3 , wherein:
The said rotation restraint mechanism is a retroreflective device which is materialized by having the structure of the rotation stop which enables each of the said 1st hole part and the said 2nd hole part, and the surface of the said shaft part to be locked non-rotatably. A retroreflective device according to any one of claims 1 to 4 , wherein:
A retroreflective device, wherein the hooking portion has a frame which is located along the corner cube prisms forming the prism assembly and which can hook an end of the corner cube prism. The retroreflective device according to claim 5 , wherein
At least one of the first member and the second member is provided with a seat portion that is in contact with the reflecting surface of the corner cube prism and that can hold the corner cube prism. There is a retroreflective device. The retroreflective device according to claim 6 , wherein
A retroreflective device in which a groove portion into which an edge of the corner cube prism can be fitted is provided in the seat portion. A retroreflective device according to any one of claims 1 to 7 , wherein:
A cylindrical retroreflective device in which the shaft portion is formed in a long shape and has a through hole penetrating from one end side to the other end side in the longitudinal direction thereof.

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