Structure inspection device

Abstract

To provide a structure inspection device that can easily and safely inspect a state of a road structure or the like including an expressway with a simple configuration.SOLUTION: A structure inspection device 1 includes: a rod-shaped main body 5 whose length can be changed; a spool 9 which is provided on the rod-shaped main body 5; a rigging guide section 11 which is provided at one end in the longitudinal direction of the rod-shaped main body 5; and rigging 7 which has a portion on one side in the longitudinal direction wound around the spool 9, and a portion on the other side in the longitudinal direction extending along the longitudinal direction of the rod-shaped main body 5 from the spool 9, and is guided by the rigging guide section 11 to extend away from the rod-shaped main body 5, and in which an imaging device 13 is installed on the tip of the portion extending away from the rod-shaped main body 5.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a structure inspection device, and more particularly to one that inspects a structure using an imaging device. [Background technology]

[0002] Traditionally, road structures, including expressways, have supported the nation's social and economic activities, but as an increasing number of them are now more than 50 years old, deterioration due to fatigue and corrosion has been confirmed. In light of this, the revised Road Act Enforcement Regulations (promulgated March 31, 2014, and effective July 1) made it mandatory for periodic inspections of road bridges to be conducted by close-up visual inspections once every five years by persons with the necessary knowledge and skills. For this reason, even in cases where inspection is difficult, close-up visual inspections must be conducted once every five years.

[0003] Corrosion damage, which is one type of deterioration that occurs over time in steel bridges, can cause cross-sectional defects in components as it progresses, and in some cases is serious damage that can lead to the collapse of the bridge. Therefore, early detection through inspection is important, but corrosion damage tends to become more serious in narrow areas and places where inspection is difficult. Here, the device described in Patent Document 1 can be cited as an inspection device for bridges, etc. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Publication No. 9-312837 Summary of the Invention [Problem to be solved by the invention]

[0005] In light of the recent labor shortage, etc., there is a demand for a structure inspection device that can easily and safely inspect the condition of road structures, including expressways, with a simple configuration, without special high-altitude workers having to risk approaching the inspection points of the structures.

[0006] The present invention aims to provide a structure inspection device that has a simple configuration and enables special high-altitude workers to easily and safely inspect the condition of road structures, including expressways, without risking their safety by approaching inspection points on the structures. [Means for solving the problem]

[0007] A structure inspection device according to one aspect of the present invention is a structure inspection device having a rod-shaped body whose length can be changed, a spool provided on the rod-shaped body, a rigging guide section provided at one longitudinal end of the rod-shaped body, and a rigging having a portion on one longitudinal side wound around the spool and a portion on the other longitudinal side extending from the spool along the longitudinal direction of the rod-shaped body and guided by the rigging guide section to extend away from the rod-shaped body, and having a camera device installed at the tip of the portion extending away from the rod-shaped body.

[0008] In a structure inspection device according to this aspect of the present invention, the rod-shaped main body is configured to include a cylindrical body in which the spool is provided, and a rack whose longitudinal portion is contained within the cylindrical body and whose remaining longitudinal portion protrudes from the end of the cylindrical body outside the cylindrical body, and the cylindrical body is provided with a pinion that meshes with the rack, and the rotation of the pinion changes the protruding length of the rack from the cylindrical body, thereby allowing the length of the rod-shaped main body to be changed.

[0009] A structure inspection device according to this aspect of the present invention is a structure inspection device that is provided on the rod-shaped main body and has an intermediate pulley around which the rigging is wound, the intermediate pulley having the function of a line counter.

[0010] In a structure inspection device according to an aspect of the present invention, the rigging is provided with a mark to indicate the extension length of the portion extending away from the rod-shaped main body.

[0011] A structure inspection device according to one embodiment of the present invention is a structure inspection device having a rod-shaped first body and a rod-shaped second body, one longitudinal end of which is engaged with one end of the rod-shaped first body so as to be rotatable relative to the rod-shaped first body, the length of which can be changed, and an imaging device is installed at the other longitudinal end of the second body.

[0012] In a structure inspection device according to this embodiment of the present invention, the rod-shaped second body is configured to include a cylindrical body and a rack having a portion on one longitudinal side housed within the cylindrical body and the remaining portion on the outside of the cylindrical body protruding from the end of the cylindrical body opposite the first body, and the cylindrical body is provided with a pinion that meshes with the rack, and when the pinion rotates, the protruding length of the rack from the cylindrical body changes, thereby changing the length of the rod-shaped second body. Effect of the Invention

[0013] According to the present invention, it is possible to provide a structure inspection device that has a simple configuration and can easily and safely inspect the condition of road structures, including expressways, without a special high-altitude worker having to risk approaching the inspection points of the structure. [Brief description of the drawings]

[0014] [Figure 1] 1 is a diagram showing a structure inspection device according to a first embodiment of the present invention. [Diagram 2] FIG. 2 is an enlarged view of part II in FIG. [Diagram 3] FIG. 3 is a view taken along the arrow III in FIG. [Figure 4] FIG. 2 is an enlarged view of part IV in FIG. [Diagram 5] 5 is a view taken along the arrow V in FIG. 4. [Figure 6] FIG. 2 is an enlarged view of a portion VI in FIG. [Figure 7] FIG. 7 is a view taken along the arrow VII in FIG. [Figure 8] FIG. 2 is an enlarged view of a portion VIII in FIG. [Figure 9] 9 is a view taken along the arrow IX in FIG. 8. [Figure 10] FIG. 1 is a diagram showing a state in which a structure inspection device according to a first embodiment of the present invention is in use. [Figure 11] 1 is a block diagram showing a schematic configuration of an imaging device installed in a structure inspection apparatus according to a first embodiment of the present invention, and an image processing unit that processes images captured by the imaging device. [Figure 12] FIG. 11 is a diagram showing a structure inspection device (in use) according to a second embodiment of the present invention. [Figure 13] FIG. 11 is a diagram showing a structure inspection device (in storage) according to a second embodiment of the present invention. [Figure 14] FIG. 13 is an enlarged view of a portion XIV in FIG. [Figure 15] FIG. 15 corresponds to FIG. 14 and shows a modified example of the installation form of the imaging device. [Figure 16] FIG. 15 corresponds to FIG. 14 and shows a modified example of the installation form of the imaging device. [Figure 17] FIG. 13 is an enlarged view of a portion XVII in FIG. [Figure 18] 18 is a view seen from the arrow XVIII in FIG. 17. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0015] [First embodiment] A structure inspection device (structure inspection device; structure photographing device) 1 according to a first embodiment of the present invention is for inspecting a structure 3 (see FIG. 10).

[0016] Here, for ease of explanation, one specific horizontal direction is defined as the longitudinal direction, another specific horizontal direction perpendicular to the longitudinal direction is defined as the width direction, and the direction perpendicular to the longitudinal direction and the width direction is defined as the up-down direction.

[0017] As shown in Figures 1 to 9, a structure inspection device 1 according to a first embodiment of the present invention is configured to include a long, thin, rod-shaped main body 5, a rigging (rope) 7, a spool (reel) 9, and a rigging guide section 11.

[0018] The length of the rod-shaped main body 5 can be changed. In other words, the rod-shaped main body 5 is extendable and retractable in the longitudinal direction, and the length can be adjusted by changing and setting the value of the longitudinal dimension. The spool 9 is provided on the rod-shaped main body 5. The spool 9 is provided, for example, at a location on the other longitudinal end side (base end side) of the rod-shaped main body 5. The rigging guide 11 is provided at one longitudinal end (tip end) of the rod-shaped main body 5.

[0019] One longitudinal side of the rigging 7 is wound around a spool 9, and the other longitudinal side is unwound from the spool 9 and extends along the longitudinal direction of the rod-shaped main body 5. Furthermore, the rigging 7 is guided by a rigging guide section 11, and as a result of being guided, the rigging 7 changes its extension direction and extends away from the rod-shaped main body 5. Moreover, when the structure inspection device 1 is in use, the rigging 7 extends downward, and an imaging device (for example, an omnidirectional camera) 13 is installed at the tip (lower end) of the part that extends away from the rod-shaped main body 5.

[0020] The following description will be given taking a bridge 15 (see FIG. 10) as an example of the structure 3 to be inspected. The structure inspection device 1 is used by, for example, an inspection worker 18 standing on a bridge girder 17, holding it in his hand. An example of the inspection target of the structure inspection device 1 can be a bridge pier 19.

[0021] The length of the rod-shaped main body 5 is adapted to be appropriately adjusted when using the structure inspection device 1. When the structure inspection device 1 is stored in a storage location (not shown) or when it is carried around, the length dimension value of the rod-shaped main body 5 is small (for example, set to a minimum value).

[0022] The rod-shaped main body 5 is configured to include a cylindrical body 21 in which the spool 9 is provided, and a rack 23. The cylindrical body 21 is made of a light metal such as aluminum or an aluminum alloy.

[0023] One longitudinal side portion (base end portion) of the rack 23 is housed within the cylindrical body 21. The remaining longitudinal portion (other longitudinal side portion) of the rack 23 protrudes from the end of the cylindrical body 21 (the end opposite the spool 9; the tip) outside the cylindrical body 21. The rack 23 is engaged with the cylindrical body 21 in a sliding manner, and is capable of moving in the longitudinal direction relative to the cylindrical body 21.

[0024] The cylindrical body 21 is provided with a pinion 25 that meshes with the rack 23. The pinion 25 is rotatable relative to the cylindrical body 21. When the pinion 25 rotates, the length of the rack 23 protruding from the cylindrical body 21 changes, and the length of the rod-shaped main body 5 can be changed.

[0025] The structure inspection device 1 is provided with an intermediate pulley 27. The intermediate pulley 27 is provided on the rod-shaped main body 5 (for example, the cylindrical body 21) outside the rod-shaped main body 5. The intermediate pulley 27 is also provided at the tip of the cylindrical body 21 in the longitudinal direction of the cylindrical body 21. The rigging (rigging that is unreeled from the spool 9 and extends along the longitudinal direction of the rod-shaped main body 5) 7 is wound around the intermediate pulley 27. Furthermore, the intermediate pulley 27 has a function as a line counter. That is, the number of rotations of the intermediate pulley 27 when the intermediate pulley 27 rotates in a rolling pair with respect to the rigging 7 is counted by an encoder 28 (see FIG. 7). Then, the extension length of the rigging 7 from the rod-shaped main body 5 can be detected.

[0026] In the structure inspection device 1, the cylindrical body 21 is located at the base end side of the rod-shaped main body 5 in the longitudinal direction of the rod-shaped main body 5, and the rack 23 is located at the tip end side of the rod-shaped main body 5. In the longitudinal direction of the rod-shaped main body 5, the spool 9, intermediate pulley 27, and rigging guide part 11 are arranged in this order from the base end side to the tip end side.

[0027] The rigging 7 is provided with marks (indications) 29 to indicate the extension length of the portion of the rigging 7 that extends away from the rod-shaped main body 5 (the portion that extends downward from the rigging guide section 11). The marks 29 are provided, for example, to prevent the rigging 7 from being over-wound around the spool 9. If the rigging 7 is over-wound around the spool 9, the camera 13 installed on the rigging 7 may hit the rod-shaped main body 5 (rigging guide section 11).

[0028] Furthermore, a plurality of marks 29 may be provided at regular intervals in the longitudinal direction of the rigging 7. In this case, for example, the plurality of marks 29 may be different in color from one another so that the plurality of marks 29 can be distinguished from one another.

[0029] Here, the structure inspection device 1 will be explained in more detail.

[0030] As shown in Fig. 3 etc., the cylindrical body 21 is formed in a rectangular cylindrical shape. As shown in Fig. 2 etc., a pinion abutment portion 31 is provided at the base end in the longitudinal direction of the cylindrical body 21, against which the pinion 25 that engages with the cylindrical body 21 and moves toward the base end side in the longitudinal direction abuts. The pinion abutment portion 31 is configured to include a pinion abutment body 33, an elastic body (e.g., a compression coil spring) 35, and a cover material 37.

[0031] The lid member 37 is provided integrally with the cylindrical body 21 at the base end in the longitudinal direction of the cylindrical body 21, and closes the opening at the base end in the longitudinal direction of the cylindrical body 21. The pinion abutment body 33 is provided within the cylindrical body 21 away from the lid member 37 near the base end in the longitudinal direction of the cylindrical body 21, and is capable of moving relative to the cylindrical body 21 in the longitudinal direction of the cylindrical body 21. One end of the compression coil spring 35 is joined to the lid member 37, and the other end of the compression coil spring 35 is joined to the pinion abutment body 33.

[0032] The vertical dimension of rack 23 is slightly smaller than the vertical dimension of the space inside cylindrical body 21, and the widthwise dimension of rack 23 is slightly smaller than the widthwise dimension of the space inside cylindrical body 21.

[0033] In addition, an elastic body (for example, a plate-shaped spring material formed by bending a thin, elongated metal plate into a wave-like shape; not shown) that urges the rack 23 upward is provided between the lower surface of the rack 23 and the inner wall surface of the cylindrical body 21 that faces the lower surface. This makes it possible to eliminate rattling of the rack 23 relative to the cylindrical body 21 and to reliably engage the teeth of the rack 23 with the pinion 25. Note that a similar elastic body may be provided between the side surface of the rack 23 and the inner wall surface of the cylindrical body 21 that faces the side surface.

[0034] As shown in Figures 8 and 9, a rigging guide component 39 that constitutes the rigging guide section 11 is integrally provided at the longitudinal tip of the rack 23. The rigging guide component 39 is provided with a through hole 41 through which the rigging 7 passes. The rigging 7 is guided to pass through the through hole 41.

[0035] 2 and 3, the spool 9 is rotatably mounted on a spool support 43. The spool support 43 is integrally provided on the cylindrical body 21 and is located on the upper side of the cylindrical body 21 in the up-down direction and is located closer to the base end of the cylindrical body 21 and on the tip side of the pinion abutment portion 31 in the longitudinal direction of the cylindrical body 21.

[0036] One of the pair of flanges 45 of the spool 9, flange 45A, is a gear. Gear 45A is meshed with another gear 47. Gear 47 is rotated by an actuator such as a motor (not shown). When gear 47 rotates, spool 9 rotates, and the spool 9 winds up the cordage 7, and the cordage 7 is paid out from the spool 9.

[0037] 6 and 7, the pinion 25 is rotatably mounted on a pinion support 49. The pinion support 49 is integrally provided on the cylindrical body 21 and is located on the upper side of the cylindrical body 21 in the up-down direction and at the tip of the cylindrical body 21 in the longitudinal direction of the cylindrical body 21.

[0038] As described above, the pinion 25 meshes with the rack 23. The pinion 25 is rotated by an actuator such as a motor (not shown). When the pinion 25 rotates, the rack 23 moves relative to the cylindrical body 21, changing the length of the rack 23 protruding from the cylindrical body 21, and changing the length of the rod-shaped main body 5. By using a motor with a brake as the motor that rotates the pinion 25, it is possible to maintain the length of the rod-shaped main body 5 after changing it.

[0039] 6 and 7, the middle pulley 27 is rotatably mounted on a middle pulley support 51. The middle pulley support 51 is integrally mounted on the pinion support 49 and is located above the pinion support 49 in the up-down direction. The middle pulley support 51 is provided with a protrusion 53 for preventing the rigging 7 wound around the middle pulley 27 from coming off the middle pulley 27.

[0040] The mark 29 is provided on the rigging 7 in a manner that does not cause any protrusion from the rigging 7. For example, the mark 29 is formed by coloring a part of the rigging 7. When the entire rigging 7 (excluding the mark 29) is, for example, generally white, the mark 29 is, for example, red, which is easily noticeable.

[0041] The position of the mark 29 when the downward extension length of the rigging 7 from the tip of the rod-shaped main body 5 is at its shortest will be described. The position of the mark 29 is located near the rigging guide component 39 in the longitudinal direction of the rigging 7 and slightly on the intermediate pulley 27 side of the rigging guide component 39.

[0042] 1, the portion of the rigging 7 extending along the rod-shaped main body 5 is located on the upper side of the rod-shaped main body 5. In addition, a battery 55, an operation switch 58, an operation switch 59, a shoulder strap 64, and a handle grip cover 62 are provided on the rod-shaped main body 5 (cylindrical body 21).

[0043] Battery 55 is detachably attached to cylindrical body 21, and serves as the power source for the motor that rotates spool 9 and the motor that rotates pinion 25. By appropriately operating operation switch 58, spool 9 rotates appropriately, and by appropriately operating operation switch 59, pinion 25 rotates appropriately.

[0044] The handle grip cover 62 is formed into a rectangular cylinder out of a soft material such as rubber, and covers the portion of the cylindrical body 21 where the spool support 43 and the like are not provided. The shoulder belt 64 is worn by the inspection worker 18 on his / her shoulder when the inspection worker 18 uses the structure inspection device 1 (see FIG. 10). One end of the shoulder belt 64 is attached to the cylindrical body 21 near the spool support 43, and the other end of the shoulder belt 64 is attached to the cylindrical body 21 near the pinion support 49.

[0045] As described above, the camera 13 is arranged to be installed at the lower end of the rigging 7 (the lower end of the part extending downward from the rod-shaped main body 5). A weight 57 is provided on the lower side of the camera 13.

[0046] Moreover, a structure inspection system 61 (see FIG. 11) is constructed by the structure inspection device 1 and an image processing device 60, etc. The image processing device 60 is configured to include an input unit 63 that receives image data transmitted, for example, wirelessly from the camera (imaging device) 13.

[0047] Moreover, the image processing device 60 is configured to include an image processing unit 65, a storage unit 67, and an output unit 69. The image processing unit 65 has a function as an image correction unit that corrects an image (distorted image) captured by the imaging device 13 and received by the input unit 63 into an image with less distortion.

[0048] The storage unit 67 is configured to store the image corrected by the image processing unit 65. The output unit 69 is configured to output the image corrected by the image processing unit 65. For example, the output unit 69 is configured to display the image corrected by the image processing unit 65 on a display unit constituted by an LCD or the like.

[0049] In addition, the structure inspection system 61 receives the video captured by the imaging device 13. The received video, information for identifying the subject of the received video (e.g., the location where the video was captured), and information regarding the time of capturing the received video may be stored in the storage unit 67 in association with each other.

[0050] Incidentally, the image data may be at least one of a still image and a video. In the case of a video, a change in the posture (e.g., rotation) of the image capturing device 13 may make the video difficult to view. Therefore, the image processing unit 65 may perform correction so as to obtain a video without any change in the posture of the image capturing device 13.

[0051] Next, we will explain how to use the structure inspection device 1. When carrying the structure inspection device 1, the length of the rod-shaped main body 5 is at its shortest, the extension length of the rigging 7 from the rod-shaped main body 5 is also at its minimum, and the imaging device 13 is not installed.

[0052] In the above initial state, an inspection worker 18 arrives at the inspection site (bridge 15). The length of the rod-shaped main body 5 is adjusted appropriately, and the camera 13 is installed. Next, the extension length of the rigging 7 from the rod-shaped main body 5 is appropriately changed, and the inspection target (bridge 15) is photographed with the camera 13.

[0053] The structure inspection device 1 is composed of a rod-shaped main body 5, a spool 9 and a rigging guide section 11 provided on the rod-shaped main body 5, and a rigging 7 that is wound around the spool 9, extends from the rod-shaped main body 5, and has a camera device 13 installed at its lower end.

[0054] This simplifies the structure of the structure inspection device 1, and enables the structure inspection device 1 to be made lighter and smaller. Furthermore, when the structure inspection device 1 is not in use, the length of the rod-shaped main body 5 can be shortened (for example, made to a minimum) and the length of the rigging 7 extending from the rod-shaped main body 5 can be shortened (for example, made to a minimum), making the structure inspection device 1 easier to carry and store.

[0055] In addition, the structure inspection device 1 can adjust the length of the rod-shaped main body 5, and further, the extension length of the rigging 7, which has the camera 13 attached to its lower end, from the rod-shaped main body 5 can be adjusted. This allows special high-altitude workers to easily and safely inspect the condition of the road structure 3, etc. (for example, the condition of the bridge pier 19) without risking any danger.

[0056] Furthermore, in the structure inspection device 1, the rod-shaped main body 5 is configured to include a cylindrical body 21 and a rack 23 protruding from the end of the cylindrical body 21, and the cylindrical body 21 is provided with a pinion 25 that meshes with the rack 23. When the pinion 25 rotates, the protruding length of the rack 23 from the cylindrical body 21 changes, and the length of the rod-shaped main body 5 can be changed. This makes it possible to adjust the length of the rod-shaped main body 5 in the structure inspection device 1 with a simpler configuration.

[0057] Furthermore, in the structure inspection device 1, the intermediate pulley 27 is provided on the rod-shaped main body 5, and the intermediate pulley 27 has a function as a line counter. This makes it possible to accurately guide the rigging 7 so that it extends along the rod-shaped main body 5, and also makes it possible to measure the extension length of the rigging 7 from the rod-shaped main body 5.

[0058] In addition, in the structure inspection device 1, a mark 29 is provided on the rigging 7 to indicate the extension length of the portion (the portion of the rigging 7) extending away from the rod-shaped main body 5, so that over-winding of the rigging 7 around the spool 9 can be prevented by visual inspection.

[0059] Second Embodiment A structure inspection device 1a according to the second embodiment of the present invention is used in the same manner as the structure inspection device 1 according to the first embodiment of the present invention, and is used to inspect a structure 3 such as a bridge 15.

[0060] 12, 13, etc., the structure inspection device 1a is configured to include an elongated rod-shaped first main body 71 and an elongated rod-shaped second main body 73. The rod-shaped second main body 73 is extendable and contractible in the longitudinal direction, similar to the rod-shaped main body 5. In other words, the length can be adjusted by changing and setting the value of the longitudinal dimension.

[0061] The length of the first body 71 can also be adjusted by changing and setting the value of the longitudinal dimension. That is, the first body 71 is configured to include a plurality of shafts 89 and a locking portion 91. The plurality of shafts 89 are connected in a telescopic fashion. The first body 71 can be changed by releasing the locking portion 91, and the changed length of the first body 71 can be maintained by locking the locking portion 91.

[0062] The rod-shaped second body 73 has one end (base end) in the longitudinal direction engaged with one end (tip end) of the rod-shaped first body 71 so as to rotate relative to the rod-shaped first body 71. The rod-shaped second body 73 is adapted to have the imaging device 13 installed at the other end (tip end) in the longitudinal direction.

[0063] The following description will be given taking a bridge 15 as an example of the structure 3 to be inspected. The structure inspection device 1a is used by, for example, an inspection worker 18 at the end of a bridge girder 17, holding it in his hand. The bridge girder 17 can be held up as an inspection target for the structure inspection device 1a.

[0064] When the structure inspection device 1a is in use, the longitudinal direction of the rod-shaped first main body 71 and the longitudinal direction of the rod-shaped second main body 73 are, for example, perpendicular to each other, as shown in FIG. 12. This makes the structure inspection device 1a "L" shaped. Also, when the structure inspection device 1a is stored in a storage location and carried, the longitudinal direction of the rod-shaped first main body 71 and the longitudinal direction of the rod-shaped second main body 73 are, for example, aligned with each other. This makes the structure inspection device 1a "I" shaped, as shown in FIG. 13.

[0065] Similar to the rod-shaped main body 5, the rod-shaped second main body 73 is configured to include a cylindrical body 75 and a rack 23. A portion on one side in the longitudinal direction of the rack 23 (a portion on the base end side) is housed in the cylindrical body 75. The remaining portion in the longitudinal direction of the rack 23 (a portion on the other side in the longitudinal direction) protrudes from the end of the cylindrical body 75 opposite to the first main body 71 on the outside of the cylindrical body 75.

[0066] The cylindrical body 75 is provided with a pinion 25 that meshes with the rack 23. When the pinion 25 rotates, the length of the rack 23 protruding from the cylindrical body 75 changes, and the length of the rod-shaped second main body 73 is changed.

[0067] The structure inspection device 1a will now be described in more detail.

[0068] 12, the pinion 25 is rotatably mounted on a pinion support 49. The pinion support 49 is integrally mounted on a cylindrical body 75, and is located on the upper side of the cylindrical body 75 in the up-down direction and at the tip of the cylindrical body 75 in the longitudinal direction.

[0069] As described above, the pinion 25 meshes with the rack 23. The pinion 25 is rotated by an actuator such as a motor (not shown). When the pinion 25 rotates, the rack 23 moves relative to the cylindrical body 21, and the protruding length of the rack 23 from the cylindrical body 21 changes, so that the length of the rod-shaped main body 5 changes.

[0070] The camera 13 is set on the end (tip) of the rack 23 via a camera support 77. The attitude of the camera 13 can be changed as shown in Figs. 14 to 16. Note that reference numeral 79 in Figs. 14 to 16 denotes a lens of the camera 13.

[0071] An end (base end; end opposite to the rod-shaped second body 73) of the rod-shaped first body 71 is curved in an arc shape (for example, a quarter arc shape). A flat second body support 81 is integrally provided to an end (tip end; end on the rod-shaped second body 73 side) of the rod-shaped first body 71, as shown in Figs. 12, 17, and 18.

[0072] The rod-shaped second main body 73 is adapted to rotate relative to the second main body support 81. The second main body support 81 is provided in a pair, with the thickness direction being the width direction, and furthermore, the rectangular cylindrical rod-shaped first main body 71 and the rectangular cylindrical rod-shaped second main body 73 are sandwiched in the width direction.

[0073] 17 denoted by reference numerals 83 and 85 are cylindrical pins, and the rod-shaped first main body 71 and the second main body support 81 are integrated by the pin 83. The rod-shaped second main body 73 is engaged with the rod-shaped first main body 71 (second main body support 81) by the pin 85, and the rod-shaped second main body 73 rotates relative to the rod-shaped first main body 71 around the central axis of the pin 85.

[0074] As shown in Fig. 12, in order to reinforce the "L"-shaped state of the structure inspection device 1a, a string-shaped material 87 is attached to the rod-shaped first main body 71 and the rod-shaped second main body 73. The string-shaped material 87 is designed to exhibit resistance only against tensile forces. The provision of the string-shaped material 87 also helps to maintain the "L"-shaped state of the structure inspection device 1a.

[0075] The rod-shaped first main body 71 is provided with a battery 55, an operation switch 59, and a handle grip cover 62. The battery 55 serves as the power source for the motor that rotates the pinion 25. The pinion 25 is adapted to rotate appropriately by appropriately operating the operation switch 59. Similarly to the structure inspection device 1, the structure inspection device 1a is also adapted to construct a structure inspection system 61.

[0076] Next, a method of using the structure inspection device 1a will be described. When carrying the structure inspection device 1a, as shown in Fig. 13, the structure inspection device 1a is in an "I" shape, and the photographing device 13 is not installed. Also, the length of the rod-shaped first main body 71 is short (for example, at its shortest).

[0077] In the above initial state, the inspection worker 18 arrives at the inspection site. The structure inspection device 1a is made into an "L" shape, and the camera device 13 is installed. Next, the length of the rod-shaped first main body 71 and the extension length of the rigging 7 from the rod-shaped main body 5 are appropriately changed, and the structure 3 is photographed by the camera device 13.

[0078] The structure inspection device 1a is configured to include a rod-shaped first main body 71 and a rod-shaped second main body 73. The length of the rod-shaped second main body 73 can be changed, and the imaging device 13 is installed at the tip of the rod-shaped second main body 73. In addition, the base end of the rod-shaped second main body 73 engages with the tip of the rod-shaped first main body 71, and is configured to rotate relative to the rod-shaped first main body 71.

[0079] This allows for simplification of the structure, and also allows the structure inspection device 1a to be folded into an "I" shape when transporting or storing the structure inspection device 1a, making it easier to transport and store the structure inspection device 1a.

[0080] Furthermore, when using the structure inspection device 1a, if the structure inspection device 1a is unfolded into an "L" shape, for example, an inspection worker 18 standing on a bridge girder 17 can easily inspect the underside of the bridge girder 17.

[0081] Although the present embodiment has been described above, the present embodiment is not limited to this, and various modifications are possible within the scope of the gist of the present embodiment. [Explanation of symbols]

[0082] 1, 1a Structural inspection equipment 5 Rod-shaped body 7 Rigging 9 Spools 11 Rigging guide section 13 Imaging Equipment 21 Cylindrical body 23 Rack 25 Pinion 27 Intermediate Pulley 29 Marks 71 Rod-shaped first body 73 Rod-shaped second body 75 Cylindrical body

Claims

1. A rod-shaped body whose length can be changed, A spool provided on the rod-shaped main body; A rigging guide portion provided at one end of the rod-shaped main body in the longitudinal direction; a rigging having a portion on one side in a longitudinal direction wound around the spool, a portion on the other side in a longitudinal direction extending from the spool along the longitudinal direction of the rod-shaped main body and being guided by the rigging guide portion so as to extend away from the rod-shaped main body, and a camera device being installed at a tip of the portion extending away from the rod-shaped main body; A structure inspection device having the above structure.

2. the rod-shaped main body is configured to include a cylindrical body in which the spool is provided, and a rack having a portion on one side in a longitudinal direction housed within the cylindrical body and a remaining portion in a longitudinal direction outside the cylindrical body and protruding from an end of the cylindrical body, A structure inspection device as described in claim 1, wherein the cylindrical body is provided with a pinion that meshes with the rack, and the rotation of the pinion changes the protruding length of the rack from the cylindrical body, thereby allowing the length of the rod-shaped main body to be changed.

3. 3. A structure inspection device as described in claim 1 or claim 2, further comprising an intermediate pulley provided on the rod-shaped main body and around which the rigging is wound, the intermediate pulley having a function as a line counter.

4. 2. A structure inspection device according to claim 1, wherein the rigging is provided with a mark for indicating an extension length of a portion extending away from the rod-shaped main body.

5. A rod-shaped first body; a rod-shaped second body, one end of which in a longitudinal direction is engaged with one end of the rod-shaped first body so as to be rotatable relative to the rod-shaped first body, the length of which can be changed, and an imaging device is installed at the other end of which in the longitudinal direction; A structure inspection device having the above structure.

6. The rod-shaped second main body is configured to include a cylindrical body and a rack having a portion on one side in the longitudinal direction housed within the cylindrical body and the remaining portion in the longitudinal direction outside the cylindrical body and protruding from the end of the cylindrical body opposite the first main body, and the cylindrical body is provided with a pinion that meshes with the rack, and when the pinion rotates, the protruding length of the rack from the cylindrical body changes, thereby changing the length of the rod-shaped second main body.The structure inspection device described in claim 5.

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