WO2020255615A1

WO2020255615A1 - Retroreflection device

Info

Publication number: WO2020255615A1
Application number: PCT/JP2020/020081
Authority: WO
Inventors: 潤治市川; 博己溝口
Original assignee: 株式会社マイゾックス
Priority date: 2019-06-18
Filing date: 2020-05-21
Publication date: 2020-12-24
Also published as: JP2020204576A; JP6727590B1

Abstract

This retroreflection device (100) comprises: a prism assembly, a set of a first member (110) and second member (120), a fixing part (200), a first hole part, a second hole part, a shaft part (140), a holding mechanism (150), and a rotation impeding mechanism (160). The prism assembly comprises a plurality of corner cube prisms (131). The set of the first member (110) and second member (120) hold the prism assembly by sandwiching the same. The fixing part (200) is provided to the first member (110) and second member (120) and prevents the positional deviation of the prism assembly. The first hole part is formed in the first member (110). The second hole part is formed in the second member (120). The shaft part (140) is inserted into the first hole part and second hole part. The holding mechanism (150) maintains a state in which the first member (110) and second member (120) hold the prism assembly by sandwiching the same. The rotation impeding mechanism (160) impedes the relative rotation of the first member (110) and second member (120) around the shaft part (140).

Description

Retroreflective device

This disclosure relates to a retroreflective device.

The theodolite and total station measure the incident direction of the retroreflected light that the target retroreflects the light oscillated from the position where the theodolite and total station are set, and obtain data that contributes to the survey. As such a target, a corner cube prism capable of retroreflection may be used.

Here, in the corner cube prism, the 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 in surveying work, it is necessary to point the corner cube prism toward the theodolite or the total station. Therefore, when a single corner cube prism is used as the target in the surveying work, it is necessary to adjust the orientation of the corner cube prism every time the position where the theodolite or the total station is set is changed.

On the other hand, in Japanese Patent Application Laid-Open No. 11-512176, a retroreflective device designed to retroreflect light in a large angle range up to 360 ° in all directions by combining a plurality of corner cube prisms. Technology is disclosed. In this technology, eight right-angled triangular pyramid-shaped corner cube prisms are combined with their reflecting surfaces in close contact with each other to form a prism assembly having a substantially octahedral shape, and a retroreflective device having such a prism assembly is constructed. There is. According to this retroreflective device, the number of times the orientation of the corner cube prism is adjusted in the surveying work can be reduced, and thus the complexity of the surveying work can be reduced.

In the above technology, when a plurality of right-angled triangular pyramid-shaped corner cube prisms are combined to form 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 each corner cube prism, the corner cube prisms are often adhered to each other by using an adhesive or the like. However, the retroreflective device may be placed in a place where it is high enough to be damaged by dropping or where vibration is large, and some corner cube prisms may be chipped or damaged due to dropping or contact with other objects. It is often damaged. And if chipped or scratched, the corner cube prism will not be able to perform satisfactory retroreflection.

If the corner cube prisms are chipped or scratched, and if the corner cube prisms are glued together, it is not easy to disassemble each corner cube prism independently, and as a result, the entire prism assembly is replaced. There was the problem of having to.

Therefore, an improved retroreflective device is needed.

According to one feature of the present disclosure, the retroreflective device has three reflecting surfaces, each of which forms a plane orthogonal to each other, and light incident on these reflecting surfaces and the light reflected by the three reflecting surfaces. It has a corner cube prism having a light transmitting surface that transmits retroreflected light. The retroreflective device includes a prism assembly having a plurality of corner cube prisms, and a set of a first member and a second member that realize a sandwiched state in which the prism assembly is sandwiched. The retroreflective device is provided on each of the first member and the second member, and has a hooking portion for suppressing the displacement of the prism assembly and a first hole portion formed in the first member. The retroreflective device has a second hole portion formed in the second member, a shaft portion inserted into the first hole portion and the second hole portion, and a holding mechanism for holding the holding state. The retroreflective device has a rotation suppressing mechanism for suppressing the relative rotation of the first member and the second member with respect to the shaft portion around the axis of the shaft portion.

According to this, the prism assembly is sandwiched between the pair of the first member and the second member, and this sandwiched state is held by the holding mechanism. That is, the prism assembly can be fixed without fixing the corner cubes by adhering them to each other. Therefore, by eliminating the holding of the holding mechanism, it is possible to replace each of the corner cube prisms constituting the prism assembly independently. Further, since the first member and the second member have a rotation suppressing mechanism for suppressing the relative rotation of the shaft portion around the shaft portion with respect to the shaft portion, the prism. The torque (torsion 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 without bonding, and to fix the prism assembly.

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 the light transmitting surface are close 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 side of the prism assembly toward the inside side 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 cube prism is prevented from spilling unintentionally by the engaging piece of the hooking portion, and the work of this replacement work is carried out. The sex can be improved.

According to another feature of the present disclosure, at least one of the engaging pieces is retracted so as not to contact the engaged state and the corner cube prism provided with the proximity to be engaged in this engaged state. It is configured so that it can be switched between the saved state and the saved state. According to this, when the corner cube prism with which the engaging piece is engaged is the target of replacement, the engaging piece of the hooking portion is switched to the retracted state, so that the engaging piece becomes the corner cube prism. It is possible to avoid getting in the way of the replacement work.

According to another feature of the present disclosure, all the engaging pieces are configured to be able to switch between the engaged state and the retracted state. According to this, regardless of which corner cube prism in the prism assembly is 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 becomes a corner cube. It is possible to avoid getting in the way of the prism replacement work.

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

According to another feature of the present disclosure, the hooking portion is positioned along the array of corner cube prisms forming the prism assembly, and has a frame capable of hooking the end portion of the corner cube prism. According to this, since the hooking portions are arranged together with the corner cube prisms forming the prism assembly, the misalignment suppressing function 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 may be in contact with the reflecting surface of the corner cube prism so that the corner cube prism is leaned against it. A possible seat is provided. According to this, since it is possible to lean the reflecting surface of the corner cube prism against 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 the end edge of the corner cube prism can be fitted. According to this, the position of the corner cube prism is fixed in a more stable state by fitting the end edge of the corner cube prism into the groove.

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 retroreflection device can be slid along the rod-shaped member. That is, the position of the retroreflective device as seen in the longitudinal direction of the shaft portion can be changed via the rod-shaped member.

It is explanatory drawing which shows the use state of the retroreflection device which concerns on 1st Embodiment. It is a front view of the retroreflection device which concerns on 1st Embodiment. It is a top view of the retroreflection device which concerns on 1st Embodiment. It is a bottom view of the retroreflection device which concerns on 1st Embodiment. It is a cross-sectional view taken along the line VV of FIG. It is an exploded perspective view of the retroreflection device which concerns on 1st Embodiment. It is a perspective view which shows the process of assembling the retroreflection device which concerns on 1st Embodiment. It is a side view which shows the use state of the retroreflection device which concerns on 2nd Embodiment. It is a perspective view of the retroreflection device which concerns on 2nd Embodiment. It is an exploded perspective view of the retroreflection device which concerns on 2nd Embodiment. It is a perspective view of the 1st member (2nd member) which concerns on 2nd Embodiment. It is a top view of the 1st member (2nd member) which concerns on 2nd Embodiment. It is a perspective view of the shaft part in the retroreflection device which concerns on 2nd Embodiment. It is the bottom view of the shaft part in the retroreflection device which concerns on 2nd Embodiment. It is a perspective view of the corner cube prism in the retroreflection device which concerns on 2nd Embodiment. FIG. 5 is a perspective view showing a state in which six corner cube prisms are installed on the second member of the retroreflective device according to the second embodiment. FIG. 5 is a perspective view showing a state in which three corner cube prisms are installed on the second member of the retroreflective device according to the second embodiment. FIG. 5 is a side view showing a state in which one corner cube prism is installed on the second member of the retroreflective device according to the second embodiment. FIG. 5 is a perspective view showing a state in which three corner cube prisms are installed on the second member of the retroreflective device according to the second embodiment. FIG. 5 is a side view showing a state in which one corner cube prism is installed on the second member of the retroreflective device according to the second embodiment. It is an exploded side view which shows the positional relationship of the corner cube prism and the shaft part on the 2nd member in the retroreflection device which concerns on 2nd Embodiment. It is a perspective view which shows the process of assembling the retroreflection device which concerns on 2nd Embodiment. It is a perspective view which shows the process of assembling the retroreflection device which concerns on 2nd Embodiment. It is a perspective view which shows the process of assembling the retroreflection device which concerns on 2nd Embodiment. It is a perspective view which shows the modification of the retroreflection device which inserted the rod-shaped member.

(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, holes are made in the parts of the retroreflective device 100 to loosen or tighten the screws of another part to be combined with this part (for example, holes 101 and 104 shown in FIG. 5). (See

holes

102, 103, 105, 106) and the like), the detailed description thereof will be omitted.

As shown in FIG. 1, the retroreflective device 100 is a retroreflective device used to retroreflect the light oscillated by the total station 900 in the surveying work performed by using the total station 900. In the retroreflection device 100, the prism assembly 130 that realizes retroreflection of light is vertically reflected by a first member 110 located on the upper side of the prism assembly 130 and a second member 120 also located on the lower side. It has a structure sandwiched from. In other words, in the retroreflective device 100, the pair of the first member 110 and the second member 120 realizes a holding state in which the prism assembly 130 is sandwiched from above and below.

The first member 110 and the second member 120 are fitted into the housing 101 and the housing 104, respectively, as shown in FIGS. 1, 2, and 5. Further, as shown in FIGS. 5 and 6, the first member 110 and the second member 120 have a plastic frame 114 on the

main bodies

111 and 121 formed by cutting a cut-out steel plate, respectively. , 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 projected from the plate surface on one side, respectively. Further, the

frames

114 and 124 are integrated with the

main bodies

111 and 121 by fitting the inner peripheral surfaces thereof with the outer peripheral surfaces of the

bosses

112 and 122, respectively. However, the first member and the second member may be one in which the main body and the frame are integrally molded, and the main body and the frame may be made of the same material.

Further, as shown in FIG. 5, the

main bodies

111 and 121 are perforated so as to penetrate the

bosses

112 and 122 in the projecting direction (vertical direction in FIG. 5), respectively, and the first hole portions 113 and the second are formed. It is configured to include 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, by inserting the end of the shaft portion 140 into each of the first hole portion 113 and the second hole portion 123, the

main bodies

111 and 121 can be connected to each other by the shaft portion 140.

As shown in FIGS. 5 to 7, the shaft portion 140 includes a dent 141 provided with a suspended surface in the vicinity of the midpoint between both ends thereof. The shaft portion 140 includes a hook 142 that sandwiches the dent 141 from both sides (upper and lower sides as seen in FIG. 5) when the shaft portion 140 extends. These hooks 142 are locked to the boss 112 or the boss 122 provided with the end of the shaft portion 140 when it 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 hook 142 is provided so that the plate surface on the other side of the

main bodies

111 and 121, which is opposite to the side on which the

bosses

112 and 122 are projected, and the end of the shaft portion 140 are flush with each other. Specify the insertion depth.

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 screws 152 for screwing the

main bodies

111 and 121 of the first member 110 or the second member 120 to the housing 101 or the housing 104. Further, the holding mechanism 150 is screwed into the screw holes 143 drilled at both ends of the shaft portion 140, and the head protruding from the screw holes 143 is the end of the shaft portion 140 and the other side plate of the

main bodies

111 and 121. A flange bolt 151 that locks to the surface is provided. As a result, the holding mechanism 150 realizes holding of the holding 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, the first member 110 and the second member 120 can rotate relatively around the axis of the shaft portion 140. However, this rotation is suppressed by the rotation suppression mechanism 160 shown in FIGS. 3 to 5. The rotation restraint mechanism 160 includes a flattening 163 at each end of the shaft portion 140, wherein a part of the surface facing the first hole portion 113 or the second hole portion 123 is a flat surface. Further, the rotation suppression mechanism 160 penetrates from the edge surface formed of the cut surface of the steel plate constituting the main body 111 or the main body 121 to the inner surface of the first hole portion 113 or the second hole portion 123. It is provided with a screw hole 161. Further, the rotation restraint mechanism 160 includes a female screw 162. The female screw 162 can be screwed into the screw hole 161 and its tip can be locked to the flat head 163 provided on the shaft portion 140. As a result, the rotation suppression mechanism 160 can lock each of the first hole portion 113 or the second hole portion 123 and the surface of the shaft portion 140 so as not to rotate. The rotation suppressing mechanism 160 suppresses the relative rotation of the first member 110 and the second member 120.

In the present embodiment, the set screw 162 is a flat-tip enamel set screw. Therefore, the female screw 162 can be screwed into the screw hole 161 in a state where the entire screw hole 161 is inserted into the screw hole 161. The female screw 162 can be locked to the flat head 163 by bringing its tip into surface contact with the flat head 163.

As shown in FIG. 7, the prism assembly 130 has six corner cube prisms 131 each formed in a substantially right-angled triangular pyramid shape. The prism assembly 130 is configured by arranging and combining the corner cube prisms 131 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 when viewed from the side (see FIG. 2) by arranging the corner cube prisms 131 so as to be staggered. Further, the hook 142 of the shaft portion 140 has a truncated cone shape with a small diameter on the dent 141 side, so that interference with the corner cube prism 131 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 reflection planes 132, and the remaining planes as light transmission planes 133. Therefore, the light transmitting surface 133 of the corner cube prism 131 has a substantially equilateral triangular shape, and the three corners thereof are the proximity portion 134 (the light transmitting surface 133 and two of the three reflecting surfaces 132 are close to each other). (See FIG. 7).

Here, the three reflecting surfaces 132 realize retroreflection of the incident light. Further, the light transmitting surface 133 transmits light incident on the three reflecting surfaces 132. Further, the light transmitting surface 133 transmits the retroreflected light in which the light incident on the three reflecting surfaces 132 is reflected by the three reflecting surfaces 132. 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 exhibit a substantially equilateral triangle shape, and the corner cube prism 131 in which each side of the substantially equilateral triangle forms a prism assembly 130 is arranged. Positioned along. As a result, the

frames

114 and 124 can be set in a state in which 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 faces the

frame

114 and 124 to which the vertex belongs when viewed from either one end side or the other end side of the shaft portion 140. It is exposed without being obscured by 114.

Further, as shown in FIG. 5, the

frames

114 and 124 are in contact with the reflecting surface 132 of the corner cube prism 131, respectively, and the seat portion 115 is capable of being leaned against the corner cube prism 131. , 125. These

seats

115 and 125 have a substantially pyramidal shape protruding from the corners of the substantially equilateral triangles of the

frames

114 and 124, respectively, and the two sides of the substantially pyramid shape are the substantially equilateral triangles of the

frames

114 and 124. It is arranged along the two sides of. Further, the

seat portions

115 and 125 can be hung with the reflective surface 132 on each side surface (see FIG. 7).

Further, in the

seat portions

115 and 125, a groove portion (see the

groove portions

116 and 126 in FIG. 5) is provided at a portion sandwiched between the side surfaces on which the corner cube prism 131 is leaned. As shown in FIG. 7, the groove portion can be fitted with the end side 135, which is the side where the two reflecting surfaces 132 intersect in the corner cube prism 131.

The misalignment of the prism assembly 130 is suppressed by the hooking portion 200 shown in FIGS. 3 to 5. The hooking portion 200 is configured by attaching an engaging piece 210 to each of the three vertices of the substantially equilateral triangles of the

frames

114 and 124. The engaging piece 210 can be engaged with the proximity portion 134 of the corner cube prism 131.

The

frames

114 and 124 exert a function as a part of the hooking portion 200 by hooking the end portions 136 forming the sides of the light transmitting surface 133 (see FIG. 7). Further, the engaging piece 210 includes a band-shaped contact surface 211 which is in contact with the light transmitting surface 133 in the proximity portion 134 so as to face the light transmitting surface 133. The

frames

114 and 124 and the engaging piece 210 are both configured to realize an engaged state in which the prism assembly 130 is engaged from the outside side to the inside side, and the misalignment of the prism assembly 130 is suppressed. Contribute to.

In the present embodiment, as shown in FIGS. 3 and 4, the end of the contact surface 211 of the engaging piece 210 is a chamfered portion 212 chamfered with a wide chamfer (see FIG. 6). When the contact surface 211 comes into contact with the light transmitting surface 133, the chamfered portion 212 engages with the proximity portion 134 of the corner cube prism 131 adjacent to the corner cube prism 131 from the direction along the light transmitting surface 133. ..

Further, in the present embodiment, as shown in FIGS. 3 to 5, all the engaging pieces 210 are attached to the

frames

114 and 124 via screws 201. Therefore, the engaging piece 210 can be switched between the engaged state and the retracted state by attaching and detaching the screw 201. The retracted state is a state in which the engaging piece 210 is retracted so as not to come into contact with the corner cube prism 131 provided with the proximity portion 134 to be engaged in the engaged state. In this retracted state, as shown by a virtual line in FIG. 5, the engaging piece 210 and the screw 201 are separated from the

frames

114 and 124.

According to the retroreflective device 100, the prism assembly 130 is sandwiched between the first member 110 and the second member 120, and the sandwiched state is held by the holding mechanism 150. That is, the prism assembly 130 can be fixed even if the individual corner cube prisms 131 are not fixed to each other by adhesion or the like. Therefore, by eliminating the holding of the holding mechanism 150, it is possible to replace each of the corner cube prisms 131 independently.

The retroreflective device 100 has a rotation suppressing mechanism 160 that prevents the first member 110 and the second member 120 from rotating relative to the shaft portion 140. More specifically, the rotation suppression mechanism 160 can prevent the first member 110 and the second member 120 from rotating relative to the axis 140 around the shaft 140. Therefore, the retroreflective device 100 can suppress the torque (torsional moment) acting on the prism assembly 130 in the direction around the axis of the shaft portion 140. Therefore, it is possible to prevent the prism assembly 130 from being disassembled regardless of adhesion and fix the prism assembly 130.

According to the retroreflective device 100, the rotation suppressing mechanism 160 can prevent the first member 110 and the second member 120 from rotating relatively around the axis of the shaft portion 140. That is, the rotation suppression mechanism 160 can fulfill its function by a relatively simple configuration of the rotation stopper.

When the holding mechanism 150 is loose during the replacement work of the corner cube prism 131, the corner cube prism 131 can be prevented from unintentionally spilling by the engaging piece 210 of the hooking portion 200. Thereby, the workability of the replacement work can be improved.

When the corner cube prism 131 to which the engaging piece 210 is engaged is the target of replacement, by switching the engaging piece 210 to the retracted state, the engaging piece 210 can be used for the replacement work of the corner cube prism 131. You can avoid getting in the way.

Regardless of which corner cube prism 131 in the prism assembly 130 is to be replaced, the engaging piece 210 at the position corresponding to the corner cube prism 131 to be replaced is switched to the retracted state, so that the engaging piece 210 becomes the corner cube. It is possible to avoid getting in the way of the replacement work of the prism 131.

Since the hooking portions 200 are arranged in line with the corner cube prism 131, the misalignment suppressing function of the prism assembly 130 becomes more reliable.

Since it is possible to lean the reflective surface 132 of the corner cube prism 131 against the

seats

115 and 125, it becomes easy to fix the arrangement of the corner cube prism 131.

By fitting the end side 135 of the corner cube prism 131 into the

grooves

116 and 126, the position of the corner cube prism 131 is fixed in a more stable state.

The vertices of the substantially equilateral triangles of the

frames

114 and 124 are exposed without being obscured by the

frames

124 and 114 facing the

frames

114 and 124 to which the vertices belong when viewed from at least one direction. As a result, in the work of switching between the engaged state and the retracted state of the engaging piece 210, the interference between the screwdriver (not shown) for attaching / detaching the screw 201 and the frame 114 or the frame 124 is reduced. Therefore, the workability of the work of switching can be improved.

(Second Embodiment)
Subsequently, the retroreflective device 1 according to the second embodiment will be described with reference to FIGS. 8 to 21. As shown in FIG. 8, this retroreflective device 1 is used as a target of the total station 40. The retroreflective device 1 installed at the target coordinates retroreflects the light beam oscillated from the total station 40 (see the broken line in the figure). That is, by measuring the time and direction in which the light beam is oscillated from the total station 40 and the time and direction in which the light ray retroreflected from the retroreflective device 1 is received by the total station 40, the target point where the retroreflective device 1 is installed is reached. It is possible to measure the distance or direction of, and to perform geodesy and surveying. In the following, the top and bottom of each configuration in the retroreflection device 1 will be described by the top and bottom when the retroreflection device 1 is in the state shown in FIG.

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

As shown in FIGS. 11 and 12, the second member 3 (first member 2) is composed of 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), has the same shape as the upper surface, and has the other surface 12 provided on the opposite side of the one surface, the one surface 11 and the other. It has a side wall 13 connecting the directions 12. That is, the seat plate 10 is formed in a substantially triangular columnar shape. On the other hand, the surface 11 is provided with hooking portions 3b (2b) at three locations along each side having a substantially triangular shape. The hooking portion 3b (2b) is formed in a groove shape recessed on the other surface 12 side as compared 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 in shape to the shape of the seat plate 10 in a plan view. At the center of the seat portion 20, a second hole portion 3a (first hole portion 2a) is provided 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) has a circular shape in which both ends are flattened. Further, groove portions 21 are provided in three directions radially from the second hole portion 3a (first hole portion 2a). The upper end of the seat 20 is provided with three inclined surfaces 22 that incline from above to below.

As shown in FIGS. 9 and 10, the shaft portion 5 includes a first hole portion 2a in the first member 2 (see FIGS. 11 and 12) and a second hole portion 3a in the second member 3 (FIGS. 11 and 12). It is a shaft-shaped member that is used by being inserted through both of them. 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 flat surface on the side portion of the cylinder. That is, the cross-sectional shapes of the first locking portion 5a and the second locking portion 5b are the first hole portion 2a (see FIGS. 11 and 12) of the first member 2 and the second hole of the second member 3 described above. It is designed to be substantially identical to the internal shape of part 3a (see FIGS. 11 and 12). The central portion 5e is formed in a columnar shape having a diameter smaller than the diameter of the first locking portion 5a and the second locking portion 5b. The shaft head 5d is formed in a disk shape having a diameter larger than that of the first locking portion 5a and the second locking portion 5b. The shaft tail portion 5c is formed in a columnar shape having a diameter smaller than the diameter 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-angled triangular pyramid shape. Specifically, it has three end faces 6a having a substantially right-angled triangle shape and a retroreflective surface 6c having a substantially regular triangular shape. The first end side 6b is set on the side located at the boundary between the end faces 6a. The second end side 6d is set as the side located at the boundary between the end surface 6a and the retroreflective surface 6c. The second end side 6d has a chamfered shape. Further, each vertex of the corner cube prism 6 having a substantially right-angled triangular pyramid shape is provided with a chamfered end portion 6e. The first end edge 6b corresponds to the "end edge" in the present disclosure. Further, the three end faces 6a are three reflecting planes each forming a plane orthogonal to each other. The retroreflective surface 6c is a surface that transmits light incident on the three end faces 6a and retroreflected light reflected by the three end faces 6a, and corresponds to the "light transmitting surface" in the present disclosure. ..

Subsequently, the arrangement of each corner cube prism 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 retroreflective surfaces 6c facing outward and the end surfaces 6a in contact with each other. 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 the 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 remaining set of 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 constituting 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 side 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 leaned against the inclined surface 22 of the seat portion 20. That is, the corner cube prism 6 constituting the first corner cube prism assembly 8 is fixed by one of the hooking 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 constituting the second corner cube prism set 9 are fixed by the seat portion 20 in the second member 3. Specifically, as shown in FIG. 20, the first end side 6b of the corner cube prism 6 is fitted into the groove 21 of the seat portion 20 and is hung. Further, the end surface 6a of the corner cube prism 6 constituting the second corner cube prism assembly 9 comes into contact with the end surface 6a (see FIG. 17) of the corner cube prism 6 constituting the first corner cube prism assembly 8. As a result, the relative position of the corner cube prism 6 with respect to the second member 3 is fixed.

The above-mentioned positional relationship between the second member 3 and the corner cube prism 6 (see FIGS. 18 and 20) 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 assembly 8 is fitted into a groove 21 (see FIGS. 11 and 12) in the seat portion 20 of the first member 2 and is hung. The second end side 6d of the corner cube prism 6 of the second corner cube prism set 9 is hooked on the hooking portion 2b (see FIGS. 11 and 12). Further, the end surface 6a of the corner cube prism 6 is leaned against the inclined surface 22 (see FIGS. 11 and 12) of the seat portion 20 of the first member 2.

Subsequently, with reference to FIG. 21, the positional relationship between the corner cube prism 6 and the shaft portion 5 will be described. 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 diameter of the central portion 5e of the shaft portion 5 is set to be smaller than that of the first locking portion 5a and the second locking portion 5b. Further, the end portion 6e of the corner cube prism 6 is chamfered. As a result, the positions of the end portion 6e of the corner cube prism 6 and the central portion 5e of the shaft portion 5 do not overlap with each other. Therefore, the shaft portion 5 and the corner cube prism 6 can be installed at a desired position without difficulty.

Subsequently, the process of assembling the present embodiment will be described with reference to FIGS. 22 to 24. As shown in FIG. 22, the axis with respect to the first hole 2a (see FIGS. 11 and 12) of the first member 2 and the second hole 3a (see FIGS. 11 and 12) of the second member 3. The part 5 is inserted. At this time, the distance L between the first member 2 and the second member 3 is set longer than when the prism assembly 4 is actually fixed so as not to 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 assembly 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 hooked on the hooking portion 3b, and the first end side 6b (see FIG. 15) is hooked. It leans against the inclined surface 22 (see FIG. 22). As a result, the corner cube prism 6 constituting the first corner cube prism set 8 is installed at a target position on the second member 3.

Subsequently, as shown in FIG. 24, the second corner cube prism set 9 is installed. Specifically, the retroreflecting surface 6c of the corner cube prism 6 of the second corner cube prism assembly 9 is directed outward, and the end surface 6a (see FIG. 15) and the second corner cube prism 6 of the first corner cube prism assembly 8 are directed. The end faces 6a (see FIG. 15) of the corner cube prism 6 of the corner cube prism assembly 9 are brought into contact with each other. Further, the first end side 6b (see FIG. 15) of the corner cube prism 6 of the second corner cube prism assembly 9 is fitted into the groove portion 21 (see FIG. 23) of the seat portion 20. As a result, the prism assembly 4 composed of the first corner cube prism assembly 8 and the second corner cube prism assembly 9 is installed at a target position on the second member 3.

As shown in FIG. 24, the prism assembly 4 is attached to the first member by sliding the first member 2 in the direction in which the first member 2 approaches the second member 3 (direction of arrow A) along the shaft portion 5. It is sandwiched by a set of 2 and the 2nd member 3. Then, as shown by the arrow B, the fastener 7 is fitted into the shaft 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 between the shaft head 5d of the shaft portion 5 and the fastener 7 are held, and the prism assembly 4 is held by the first member 2 and the second member 3. Is retained.

According to the above embodiment, as shown in FIG. 9, the prism assembly 4 is sandwiched between the first member 2 and the second member 3. Further, the first member 2 and the second member 3 are held by a shaft head portion 5d (see FIG. 13) and a fastener 7 (see FIG. 10) of the shaft portion 5. That is, it is possible to fix the prism assembly 4 having a plurality of corner cube prisms 6 without fixing the corner cubes 6 to each other by adhesion or the like. Therefore, it is possible to replace each of the corner cube prisms 6 constituting the prism assembly 4 independently.

Further, the first locking portion 5a and the second locking portion 5b of the shaft portion 5 shown in FIGS. 13 and 14 have the surface shapes of the first member 2 (second member) shown in FIGS. 11 and 12, respectively. It is designed to be substantially the same as each inner shape of the first hole portion 2a (second hole portion 3a) of 3), and has a detent structure that allows them to be locked to each other so as not to rotate. Therefore, as shown in FIGS. 9 and 10, the first member 2 and the second member 3 rotate relative to the shaft portion 5 around the shaft portion 5 with the shaft portion 5 as the center. It has been established as a rotation suppression mechanism that suppresses. Therefore, the torque (torsional moment) in the direction around the axis of the shaft portion 5 does not act on the prism assembly 4. That is, when the prism assembly 4 is held by the first member 2 and the second member 3, it is possible to prevent the prism assembly 4 from being disassembled without bonding.

As shown in FIGS. 11 and 12, the hooking portion 3b is positioned along the arrangement of the corner cube prisms 6 forming the prism assembly 4. Further, the hooking portion 3b is formed in a shape having a frame on which the end portion 6e (see FIG. 16) of the corner cube prism 6 can be hooked. According to this, since the hooking portions 3b are arranged in line with the corner cube prisms 6, the misalignment suppressing function of the prism assembly 4 becomes more reliable.

A seat portion 20 on which the first end side 6b or the end surface 6a of the corner cube prism 6 can be hung on the first member 2 and the second member 3 is provided. This makes it easier to fix the arrangement of the corner cube prisms 6.

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

(Other embodiments)
The present disclosure is not limited to the above-described embodiments 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, various forms such as the following can be implemented.

(1) In the retroreflective device 100 according to the first embodiment, the holding mechanism 150 is a mechanism for fixing the

main bodies

111 and 121 of the first member 110 or the second member 120 by using flange bolts 151 and screws 152. is there. Further, in the retroreflective device 1 according to the second embodiment, the holding mechanism for holding the first member 2 and the second member 3 is a mechanism of sandwiching the shaft portion 5 by the shaft head 5d and the fastener 7. .. However, the holding mechanism of the retroreflective device in the present disclosure including the first embodiment and the second embodiment described above is a holding mechanism that holds a state in which the first member 2 and the second member sandwich the prism assembly. Anything will do, if any. For example, as the holding mechanism of the present disclosure, a mechanism for fixing the first hole portion (second hole portion) and the shaft portion of the first member (second member) with a rod-shaped retaining mechanism penetrating in the radial direction thereof can be considered. ..

(2) In the retroreflective device 100 according to the first embodiment, the rotation suppression mechanism 160 locks the female screw 162 to the flattening 163 provided on the shaft portion 140, and thus the first hole portion 113 or the first hole portion 113 or the first. It is a detent configuration that allows each of the two hole portions 123 and the surface of the shaft portion 140 to be non-rotatably locked. The set screw 162 is a flat-tip enamel set screw. The female screw 162 can be screwed into the screw hole 161 with the entire screw hole 161 inserted inside the screw hole 161. The female screw 162 can be locked to the flat head 163 by bringing its tip into surface contact with the flat head 163. Further, in the retroreflective device 1 according to the second embodiment, the cross-sectional shape of the first locking portion 5a and the second locking portion 5b of the shaft portion 5 is the same as that of the first member 2 (second member 3). It is designed to be substantially the same as the inner shape of the first hole portion 2a (second hole portion 3a). As a result, it is possible to prevent the shaft portion 5 from rotating relative to the first member 2 and the second member 3. In this way, a rotation suppressing mechanism for suppressing the rotation of the first member 2 and the second member 3 relative to the shaft portion 5 is established with the shaft portion 5 as the rotation axis.

However, the rotation suppression mechanism in the present disclosure may be based on any technical idea as long as the first member and the second member are locked so as to be relatively non-rotatable with respect to the shaft portion with the shaft portion as the rotation shaft. Absent. For example, it is possible to apply the technical idea of the second embodiment to the first embodiment, or vice versa.

Consider the case where the technical idea of the second embodiment is applied to the rotation suppression mechanism. For example, the cross-sectional shape of the shaft portion is an a-fold symmetric figure with respect to the finite natural number a, and 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 the same shape. It is possible to prevent the first member and the second member from rotating relative to the shaft portion with the shaft portion as the rotation axis. Examples of the a-fold symmetric figure with respect to the finite natural number a include a polygon, an ellipse, and a figure having line symmetry.

Here, when the cross-sectional shape of the shaft portion is an a-time symmetric figure with respect to the 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. There is no need to. That is, it suffices that the first member and the second member can be prevented from rotating relative to 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, and at the same time, the cross-sectional shape of the shaft is quadrangular, and the shaft is fitted into the first and second holes and does not rotate. It 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. By press-fitting the shaft portion into the first hole portion and the second hole portion, the first member and the second member are prevented from rotating relative to the shaft portion with the shaft portion as the rotation axis. Can also be adopted as a rotation suppression mechanism.

When the technical idea of the first embodiment is applied to the rotation suppression 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 is used as a recessed tip. It is possible to omit flattening from. Alternatively, for example, change the female screw to any type of screw that can be screwed into this screw hole, such as a full screw such as a long screw or a stud bolt, with the entire screw hole inside. can do. Alternatively, for example, the female screw may be a screw having a head having a diameter larger than that of the screw hole, and the head may be projected from the edge surface of the main body.

(3) In each embodiment of the present disclosure, the technical idea relating to the engaging piece of the first embodiment described above can be applied. When this technique applies 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 snap lock or toggle latch. Alternatively, the engaging piece can be attached to the frame via the slide rail, and the engaging piece can be slid on the slide rail to switch between the engaged state and the retracted state. In this case, the slide rail may be a straight line or an arbitrary curved line, and the orientation of its installation can be appropriately set. Further, the engaging piece may or may not be separated from the slide rail and the frame in the retracted state.

By equipping one of the engaging piece and the frame with a part that also functions as a clip for grasping the other, the engaging piece can be attached to and detached from the frame, and it is possible to switch between the engaged state and the retracted state. Can be. Alternatively, one of the engaging piece and the frame is provided with a part that functions as a magnet, and the other is provided with a part that functions as a magnet or a ferromagnet, so that the engaging piece can be attached to and detached from the frame by magnetic force. Therefore, it is possible to switch between the engaged state and the retracted state.

For example, a member removed from the frame when the engaging piece is brought into the retracted state and the frame are connected by a leash cord, so that the member separated from the frame when the engaging piece is brought into the retracted state can be eliminated. Here, the "member to be removed from the frame" specifically includes, for example, the engaging piece itself or a fixing tool 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 state and the retracted state of the engaging piece cannot be switched. In this case, the configuration in which the engaging pieces are integrated with the frame is such that the engaging pieces and the frame are integrally molded even if the engaging pieces and the frames formed separately from each other are fixed to each other. There may be.

(4) In each embodiment of the present disclosure, a technical idea can be applied in which the shaft portion is long 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 technical idea, by inserting a rod-shaped member into the through hole of the shaft portion, the retroreflective device is slid along the rod-shaped member, and thus the position of the retroreflective device as viewed in the longitudinal direction of the shaft portion is changed. can do.

For example, when the above technical idea is applied to the second embodiment, the shaft portion 51 is formed to be long and one end in the longitudinal direction thereof, as in the retroreflective device 50 according to the modified example shown in FIG. An embodiment having a tubular shape having a through hole 51f penetrating from the side to the other end side can be obtained. According to this, the rod-shaped member 60 can be inserted into the through hole 51f of the shaft portion, and the retroreflection device 50 can be slid along the rod-shaped member 60. That is, the position of the retroreflective device 50 as seen 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 member 2 in the retroreflective device 1 according to the second embodiment shown in FIG. 9, respectively. Since it is the same part as the second member 3 and the corner cube prism 6, the same reference numerals are given to them and detailed description thereof will be omitted.

(5) In each embodiment of the retroreflection device of the present disclosure, the reflecting surfaces of the corner cube prisms constituting the prism assembly can be in direct contact with each other. However, in the present disclosure, the prism assembly may be provided with a member or material sandwiched between the corner cube prisms as long as the retroreflective surface of the corner cube prism is directed outward and retroreflection is possible. For example, a film 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 a prism assembly in which some of the corner cube prisms constituting the prism assembly are replaced with members other than the corner cube prisms that do not reflect retroreflection. The "non-retroreflective 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 the displacement of the prism assembly can be prevented.

(8) In the first embodiment and the second embodiment described above, the retroreflective device is provided for retroreflective light oscillated by the total station, but the use of the retroreflective device according to the present disclosure. Is not limited to this. For example, the retroreflection device can be used to retroreflect the light oscillated from the position where the theodolite is set and cause the theodolite to measure the light, thereby obtaining data useful for the survey.

The various examples described in detail with reference to the accompanying drawings are representative examples of the present disclosure and do not limit the present disclosure. The detailed description is intended to teach one of ordinary skill in the art in order to create, use and / or implement various aspects of this teaching and is not intended to limit the scope of the present disclosure. In addition, each additional feature and teaching described above is applied and / or used separately or in combination with other features and teachings to provide an improved retroreflective device and / or method of manufacture and use thereof. obtain.

Claims

A corner cube prism having three reflecting surfaces, each of which forms a plane orthogonal to each other, and a light transmitting surface that transmits 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 holding state in which the prism assembly is sandwiched, and
A hooking portion provided on each of the first member and the second member to suppress a misalignment of the prism assembly, and
The first hole formed in the first member and
The second hole formed in the second member and
The shaft portion inserted into the first hole portion and the second hole portion, and
A holding mechanism that holds the pinched state and
A retroreflection device having a rotation suppressing mechanism for suppressing the relative rotation of the first member and the second member with respect to the shaft portion around the axis of the shaft portion.
The retroreflective device according to claim 1.
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 the light transmitting surface are close to each other.
The hooking portion includes one engaging piece configured to be engaged with the proximity portion so as to be engaged with the proximity portion from the outside side of the prism assembly toward the inside side of the prism assembly. The retroreflection device provided above.
The retroreflective device according to claim 2.
At least one of the engaging pieces is in an engaged state and a retracted state in which the corner cube prism provided with the proximity portion to be engaged in the engaged state is retracted so as not to come into contact with the corner cube prism. A retroreflective device that is configured to be switchable.
The retroreflective device according to claim 3.
A retroreflective device in which all the engaging pieces are configured to be able to switch between the engaged state and the retracted state.
The retroreflective device according to any one of claims 1 to 4.
The rotation suppression mechanism is a retroreflecting device having a detent structure capable of locking each of the first hole portion and the second hole portion and the surface of the shaft portion relatively non-rotatably.
The retroreflective device according to any one of claims 1 to 5.
A retroreflective device having a frame in which the hooking portion is positioned along an array of the corner cube prisms forming the prism assembly and is configured to hook the end portion of the corner cube prism.
The retroreflective device according to claim 6.
At least one of the first member and the second member is provided with a seat portion configured to be in contact with the reflecting surface of the corner cube prism so that the corner cube prism is leaned against the corner cube prism. A retroreflective device.
The retroreflective device according to claim 7.
A retroreflective device in which a groove portion into which an end edge of the corner cube prism can be fitted is provided in the seat portion.
The retroreflective device according to any one of claims 1 to 8.
A retro-reflecting device having a tubular shape in which the shaft portion is formed to be long and has a through hole penetrating from one end side to the other end side in the longitudinal direction thereof.