JP6897216B2 - Under-bridge inspection device and under-bridge inspection method - Google Patents

Description

The present invention relates to an under-bridge inspection device for inspecting equipment installed on the lower surface of a bridge and an under-bridge inspection method.

Equipment such as a pipeline for accommodating electric wires is installed on the lower surface of a bridge over a river or the like. This equipment requires regular inspections (under-bridge inspections) to check for damage. In the under-bridge inspection, scaffolding was installed so that the underside of the bridge could be accessed, and workers visually inspected the scaffolding, and the scaffolding was removed after the inspection was completed.

However, such under-bridge inspection requires scaffolding installation work and removal work, which is a large-scale and time-consuming work. Therefore, the cost of materials and labor costs is high. In addition, traffic restrictions on bridges are often required, which requires labor and days for application procedures to the government, and labor costs for security guards and guides.

Patent Document 1 describes an inspection device that inspects under the bridge by checking an image of the lower surface of the bridge from above the bridge. This inspection device is equipped with a traveling trolley that runs on the bridge and a photographing camera attached to the traveling trolley via a horizontal arm or a vertical rod, and the inspection object is photographed from below by the photographing camera. ..

Patent No. 4782163

Since the inspection device described in Patent Document 1 requires a self-propelled traveling carriage (that is, a special vehicle), there is a problem that the cost of inspection under the bridge is high. In addition, a work space is required to drive a special vehicle slowly on a bridge, which may require road closure.

In view of such a problem, an object of the present invention is to provide an under-bridge inspection device and an under-bridge inspection method which can easily perform an under-bridge inspection, do not require a work space, and have a simple mechanism.

In order to solve the above problems, a typical configuration of the under-bridge inspection device according to the present invention includes a trolley running on the handrail of the bridge, a beam attached to the trolley, and a rod suspended from the beam. It is characterized by being equipped with a camera attached to the lower end of the rod and taking a picture of the equipment installed on the lower surface of the bridge.

According to the above configuration, while the bogie is running on the railing of the bridge, the equipment installed on the lower surface of the bridge can be photographed by the camera attached to the bogie via the beam and the rod. Therefore, the inspection under the bridge can be easily performed, and the inspection can be completed in a short time. In addition, since it is only necessary to run the dolly on the railing of the bridge, no work space is required, so there is no need for road closures and no administrative procedures. Due to its simpler mechanism, it is light in weight, portable and inexpensive.

The carriage comprises an upper roller traveling on the upper surface of the handrail, an outer roller traveling on the outer side surface of the handrail, and an inner roller traveling on the inner side surface of the handrail, and at least one of the outer roller or the inner roller. It is preferable that one can adjust the position toward the other in the disengagement direction. As a result, the dolly can be brought into contact with the upper surface of the handrail by the upper roller, and the side surface of the handrail can be sandwiched between the outer roller and the inner roller. Therefore, the dolly can be attached to a handrail of any width.

Of the above outer rollers or inner rollers, one may be composed of two rollers and the other may be composed of one roller. As a result, even when the bridge (handrail) is bent, it is possible to follow the side surface of the handrail with three rollers including an outer roller and an inner roller. As an example, if two rollers are in contact with the outside of the curve of the handrail and one roller is in contact with the inside of the curve, the bogie can travel well along the curve.

The outer roller and the inner roller may be long rollers that are long in the vertical direction. Here, the vertical direction is the axial direction of the roller. The long length is preferably long as long as it does not interfere with the rotation of the roller, but at least the width of the roller is longer than the diameter of the roller. If the outer roller and the inner roller running on the side surface of the handrail are long in the vertical direction, they are difficult to come off from the handrail, so that the dolly can be prevented from falling.

The upper roller, the outer roller, and the inner roller may be resin rollers. As described above, since the rollers running on the upper surface, the outer side surface, and the inner side surface of the handrail are all resin rollers, the handrail is not damaged.

The above beam is installed so as to protrude from the bogie, and it is preferable that the beam has a rod attachment portion for detachably fixing the rod at the tip of the beam. As a result, the rod can be removed from the beam, which makes it compact and easy to carry and store.

It is preferable that the above beams are installed so as to protrude on both sides of the carriage, and rod mounting portions are provided at both ends of the beams. This allows the rod to be attached to either side of the dolly. As an example, when the outer roller and the inner roller include three rollers, any of the three rollers on the side where the two rollers are arranged and the side where the one roller is arranged. Rods can be placed. Therefore, regardless of whether the bridge is bent to the left or right, the rod can be hung on the outside of the handrail, for example, with the two inner rollers arranged on the inside or outside of the curve of the handrail.

The rod mounting portion may be rotatable in the vertical direction with respect to the carriage. By rotating the rod mounting portion together with the rod, the camera at the lower end of the rod can be separated from the pier. As a result, if there is a pier protruding outside the bridge girder during the under-bridge inspection, the camera can be avoided without removing the bogie from the handrail, and the under-bridge inspection can be continued.

It is preferable that an encoder for measuring the amount of rotation is attached to at least one of the upper roller, the outer roller, and the inner roller, and the mileage of the carriage can be acquired based on the measurement result of the encoder. As a result, the damaged part of the equipment can be identified by recording the image taken by the camera and the mileage of the dolly obtained based on the measurement result of the encoder, so that the damaged part can be confirmed and repaired. It is convenient in case of.

It is preferable that the upper roller is composed of three or more rollers and can be separated from the traveling surface one by one. As a result, even if the pillars are protruding above the handrail during the inspection under the bridge, the operator can separate the upper rollers one by one from the running surface without removing the dolly from the handrail. Since the pillars can be avoided, the inspection under the bridge can be continued.

In order to solve the above problems, a typical configuration of the under-bridge inspection method according to the present invention is an under-bridge inspection method for inspecting equipment installed on the lower surface of a bridge, and a rod is attached to a beam attached to a carriage. The feature is that the camera is attached to the lower end of the rod, and the equipment is photographed by the camera while the dolly is running on the railing of the bridge.

The components corresponding to the technical idea in the under-bridge inspection device described above and their explanations can also be applied to the method.

According to the present invention, it is possible to provide an under-bridge inspection device and an under-bridge inspection method which can easily perform an under-bridge inspection, do not require a work space, and have a simple mechanism.

It is a figure which shows the under-bridge inspection apparatus in 1st Embodiment of this invention. It is a figure explaining a dolly. It is a figure which shows the state which removed the rod from the beam of the bogie of FIG. It is a figure which shows the state which sandwiched the handrail by three rollers of the bogie of FIG. It is a figure which shows the under-bridge inspection apparatus in the 2nd Embodiment of this invention. It is a figure which shows the under-bridge inspection apparatus in 3rd Embodiment of this invention. It is a figure which shows the under-bridge inspection apparatus in 4th Embodiment of this invention.

Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The dimensions, materials, and other specific numerical values shown in such an embodiment are merely examples for facilitating the understanding of the invention, and do not limit the present invention unless otherwise specified. In the present specification and drawings, elements having substantially the same function and configuration are designated by the same reference numerals to omit duplicate description, and elements not directly related to the present invention are not shown. To do.

(First Embodiment)
FIG. 1 is a diagram illustrating an under-bridge inspection device 100 according to the first embodiment of the present invention. FIG. 2 is a diagram illustrating the carriage 110. FIG. 2A is a top perspective view of the trolley 110, and FIG. 2B is a bottom perspective view of the trolley 110.

As shown in FIG. 1, equipment 106 such as a pipe for accommodating electric wires and communication cables is installed on the lower surface 104 of the bridge 102. In particular, the portion that supports the pipe is easily damaged, the mounting bracket is liable to break due to rust, and the mounting bolt is liable to fall off due to aging of the bridge 102. This equipment 106 requires regular inspection (under-bridge inspection) to confirm the presence or absence of damage.

The under-bridge inspection device 100 is a device used for under-bridge inspection of equipment 106, and includes a trolley 110 capable of traveling on the handrail 108 of the bridge 102. The carriage 110 includes two upper rollers 112 and 114 shown in FIG. 2, two inner rollers 116 and 118, and one outer roller 120.

The upper rollers 112 and 114 are resin rollers attached to the upper frame body 122 of the carriage 110, and travel on the upper surface 124 of the handrail 108 shown in FIG. The inner rollers 116 and 118 are long resin rollers that are long in the vertical direction and are attached to the inner frame body 126 shown in FIG. Here, the vertical direction is the axial direction of the roller. Further, the long length has a shape in which the width of the roller is at least longer than the diameter of the roller, and the longer the length is, the more preferable it is, as long as the rotation of the roller is not hindered.

The rail member 128 shown in FIG. 2 is arranged in the upper frame 122 of the carriage 110. A support member 130 is slidably attached to the rail member 128. The support member 130 supports an outer roller 120, which is a long resin roller that is long in the vertical direction. Further, the support member 130 is provided with a position fixing portion 132 such as a screw for fixing to the rail member 128.

The outer roller 120 may approach the inner rollers 116, 118 from the position shown by the dotted line in FIG. 2B, for example, or the inner rollers 116, 118 by sliding the support member 130 along the rail member 128. To separate from. That is, the position of the outer roller 120 can be adjusted in the disengagement direction toward the inner rollers 116 and 118.

Therefore, in the state where the trolley 110 is installed on the handrail 108 as shown in FIG. 1, the outer roller 120 is brought close to the inner rollers 116 and 118, and the outer side surface 134 and the inner side surface 136 of the handrail 108 are brought close to each other. Can be sandwiched between the outer rollers 120 and the inner rollers 116 and 118. Further, by fixing the position of the support member 130 with respect to the rail member 128 with the position fixing portion 132 while sandwiching the handrail 108, the position of the outer roller 120 in the separation direction is fixed. In this way, the dolly 110 can be attached to the handrail 108 of any width.

When the carriage 110 attached to the handrail 108 is moved by the worker 138 in the direction shown by the arrow A in FIG. 1, for example, the upper rollers 112 and 114 run on the upper surface 124 of the handrail 108, and the outer side surface 134 of the handrail 108 is moved. The outer roller 120 runs, and the inner rollers 116 and 118 run on the inner side surface 136 of the handrail 108. Therefore, the carriage 110 can reliably travel on the handrail 108 of the bridge 102.

Further, when the carriage 110 travels, the rollers in contact with the upper surface 124, the outer side surface 134, and the inner side surface 136 of the handrail 108 are all resin rollers, so that the handrail 108 is not damaged. Rubber or silicon rubber can be preferably used as the resin. Further, when the carriage 110 travels on the handrail 108, the outer side surface 134 and the inner side surface 136 of the handrail 108 are sandwiched between the outer roller 120 and the inner rollers 116 and 118 which are elongated in the vertical direction. Therefore, since the outer rollers 120 and the inner rollers 116, 118 are hard to come off from the handrail 108, it is possible to prevent the carriage 110 from falling during traveling. In order to prevent the trolley 110 from falling during the work of attaching the trolley 110 to the handrail 108, a fall prevention rope or the like may be attached to the trolley 110 and tied to the worker 138.

The under-bridge inspection device 100 further includes a beam 140, a rod 142, and a camera 144, as shown in FIG. The beam 140 is attached to the upper frame 122 (see FIG. 2) of the carriage 110, and is installed so that its tip protrudes from the carriage 110 toward the outside of the handrail 108 as shown in FIG. A rod mounting portion 146 for detachably fixing the rod 142 is provided at the tip of the beam 140.

The rod 142 is suspended from the beam 140 by being fixed to the rod mounting portion 146 of the beam 140. The rod 142 is expandable and contractible, and has a length that can reach a height near the lower surface 104 of the bridge 102 in a state of being suspended from the beam 140. Further, for the rod 142, for example, a material having an insulating property can be used. In this case, it is possible to avoid an electric shock by the operator when inspecting the equipment 106 containing the electric wires and the like under the bridge.

An arm 148 is connected to the lower end of the rod 142. The arm 148 extends in the horizontal direction so as to approach the equipment 106, and a remote-controlled electric pan head 150 is installed at the tip of the arm 148. The shooting range of the camera 144 is changed according to the movement of the remote-controlled pan head 150, and the equipment 106 installed on the lower surface 104 of the bridge 102 can be reliably shot.

FIG. 3 is a diagram showing a state in which the rod 142 is removed from the beam 140 of the carriage 110 of FIG. A fixing member 152 is attached near the upper end of the rod 142. The rod mounting portion 146 provided at the tip of the beam 140 has a holding portion 154 that holds the fixing member 152 together with the rod 142, and a position fixing portion 156 that fixes the position of the fixing member 152 held by the holding portion 154. ..

The position fixing portion 156 may be, for example, a screw or the like, and when it is screwed into the wall surface of the holding portion 154, it comes into contact with the fixing member 152 and presses the fixing member 152 to fix the position. Therefore, the rod 142 can be easily removed from the beam 140 by loosening the screw which is the position fixing portion 156 of the rod mounting portion 146. Therefore, the under-bridge inspection device 100 becomes compact by removing the rod 142 from the beam 140 of the carriage 110, and can be easily transported and stored.

FIG. 4 is a diagram showing a state in which the handrails 108 and 158 are sandwiched between the three rollers of the carriage 110 of FIG. In the figure, the dolly 110 attached to the handrails 108 and 158 is schematically shown in a state of looking up from below. Here, only a part of the carriage 110 is shown, and the upper rollers 112, 114, etc. are omitted.

With respect to the linear handrail 108 (see FIG. 1) shown in FIG. 4 (a), the trolley 110 has one outer roller 120 in contact with the outer side surface 134 of the handrail 108 and two on the inner side surface 136 of the handrail 108. The inner rollers 116 and 118 of the are in contact with each other. That is, since the carriage 110 can sandwich the outer side surface 134 and the inner side surface 136 of the handrail 108 with three rollers, it can reliably travel on the linear handrail 108.

With respect to the curved handrail 158 shown in FIG. 4B, one outer roller 120 is in contact with the outer side surface 160 which is the curved inner side of the handrail 158, and the trolley 110 is on the inner side surface 162 which is the curved outer side of the handrail 158. The two inner rollers 116 and 118 are in contact with each other. That is, since the carriage 110 can sandwich the outer side surface 160 and the inner side surface 162 of the curved handrail 158 with three rollers, the carriage 110 can reliably travel along the bend of the curved handrail 158.

The width of the handrails 108 and 158 schematically shown in the figure is constant, but the width is not limited to this, and the width may not be constant, such as the presence of gentle irregularities on the side surface of the handrail. Assuming such a case, a position adjusting mechanism such as a spring may be attached to the support member 130 of the carriage 110 so that the position of the outer roller 120 with respect to the support member 130 in the separation direction can be adjusted. In this way, for example, by urging the outer roller 120 toward the inner rollers 116 and 118 by the position adjusting mechanism, the position of the outer roller 120 in the separation direction is automatically changed according to the change in the width of the handrail. It can be displaced and kept in close contact with the sides of the handrail whose width is not constant, along with the inner rollers 116, 118.

Hereinafter, an example of the procedure of the under-bridge inspection method using the under-bridge inspection device 100 shown in FIG. 1 will be described. The worker 138 fixes the rod 142 to the rod attachment portion 146 of the beam 140 attached to the carriage 110, and suspends the rod 142 from the beam 140. Next, the operator 138 attaches the camera 144 to the pan head 150 of the arm 148 connected to the lower end of the rod 142.

Further, the operator 138 lifts the trolley 110 and arranges it on the handrail 108 so that the upper rollers 112 and 114 are in contact with the upper surface 124 of the handrail 108, and further brings the outer roller 120 closer toward the inner rollers 116 and 118. .. Then, the operator 138 is in a state where the outer side surface 134 and the inner side surface 136 of the handrail 108 are sandwiched between the outer roller 120 and the inner rollers 116 and 118 which are long in the vertical direction, and the worker 138 is outside by the position fixing portion 132 of the support member 130. The position of the roller 120 is fixed. In this way, the dolly 110 is securely mounted on the handrail 108.

Subsequently, the worker 138 extends the rod 142 to the height of the lower surface 104 of the bridge 102, and further confirms the shooting range of the camera 144 with the tablet 164 or the like while remotely controlling the pan head 150. Then, when the equipment 106 installed on the lower surface 104 of the bridge 102 can be photographed by the camera 144, the worker 138 pushes the trolley 110 as shown by the arrow A in FIG. While recording the video, inspect the equipment 106 for damage and the like.

As described above, the under-bridge inspection device 100 according to the first embodiment is the camera 144 attached to the trolley 110 via the beam 140 and the rod 142 while the trolley 110 is running on the handrail 108 of the bridge 102. The equipment 106 installed on the lower surface 104 of the bridge 102 can be photographed. Therefore, the inspection under the bridge can be easily performed, and the inspection can be completed in a short time. Further, since it is only necessary to run the carriage 110 on the handrail 108 of the bridge 102, no work space is required. For this reason, it is not necessary to close the road on the bridge 108, and there is no need for administrative procedures. Further, since the under-bridge inspection device 100 has a simple mechanism, it is light in weight, portable, and inexpensive.

In the under-bridge inspection device 100, of the outer rollers 120 and the inner rollers 116 and 118, only the outer roller 120 can be adjusted in position in the detaching direction, but the present invention is not limited to this. As an example, any of the inner rollers 116, 118 and the outer rollers 120 may be adjustable in position, or only the inner rollers may be adjustable in position. Even in such a case, the handrail 108 can be sandwiched between the inner rollers 116 and 118 and the outer rollers 120.

Further, in the under-bridge inspection device 100, the handrail 108 is sandwiched between one outer roller 120 and two inner rollers 116 and 118, but the present invention is not limited to this. For example, the outer roller may consist of two rollers and the inner roller may consist of one roller. Even in such a case, since the three rollers including the outer roller and the inner roller can follow the handrail 108, the trolley 110 travels well along the bend even if the handrail 108 is bent. it can.

Further, in the under-bridge inspection device 100, an encoder for measuring the amount of rotation may be attached to at least one of the upper rollers 112 and 114, the inner rollers 116 and 118 and the outer rollers 120. In this way, the mileage of the carriage 110 can be acquired based on the measurement result of the encoder. Then, by recording the image taken by the camera 144 together with the mileage of the trolley 110 obtained based on the measurement result of the encoder, the damaged part of the equipment 106 can be identified, so that the damaged part can be confirmed. It is convenient for repairing and repairing.

(Second Embodiment)
FIG. 5 is a diagram showing the under-bridge inspection device 100A according to the second embodiment of the present invention. The under-bridge inspection device 100A is different from the above-mentioned under-bridge inspection device 100 in that beams 166 are installed so as to protrude on both sides of the carriage 110A, and rod mounting portions 146 and 168 are provided at both ends of the beam 166. different.

In the under-bridge inspection device 110A, the rod 142 can be attached to either side of the carriage 110A. That is, when the rod 142 is fixed to the rod mounting portion 146, the rod 142 is arranged on the side of the carriage 110A on which the outer roller 120 is arranged. On the other hand, when the rod 142 is fixed to the rod mounting portion 168, the rod 142 is arranged on the side of the carriage 110 on which the inner rollers 116 and 118 are arranged.

Therefore, in the under-bridge inspection device 100A, the two inner rollers 116 and 118 can be arranged both outside and inside the handrail 108. Therefore, regardless of whether the bridge 102 is bent to the left or right, the rod 142 can be hung on the outside of the bent handrail with the two inner rollers 116 and 118 arranged on the outside of the curved handrail. it can. That is, in the under-bridge inspection device 100A, the positions of the inner rollers 116 and 118 of the bogie 110A with respect to the handrail and the rod with respect to the bogie 110A so that the bogie 110A can run more stably on the handrail when the handrail is bent. The position of 142 can be changed as appropriate.

(Third Embodiment)
FIG. 6 is a diagram showing the under-bridge inspection device 100B according to the third embodiment of the present invention. The under-bridge inspection device 100B is different from the above-mentioned under-bridge inspection device 100 in that the rod mounting portion 146 of the beam 170 can rotate in the vertical direction with respect to the carriage 110B.

The rod mounting portion 146 is connected to the beam 170 via a hinge 172 as shown in FIG. 6A. Therefore, the rod mounting portion 146 can rotate in the vertical direction with respect to the carriage 110B.

Here, it is assumed that the bridge 102 is provided with a pier 176 projecting outward from the bridge girder 174 as shown in FIG. 6 (b) at the time of inspection under the bridge. In such a case, when the operator 138 grips the upper part of the rod 142 and rotates the rod 142 in the direction indicated by the arrow B, the rod mounting portion 146 rotates together with the rod 142. Then, the camera 144 located at the lower end of the rod 142 can rotate in the direction indicated by the arrow C and separate from the pier 176.

In order for the operator 138 to reliably grip the rod 142 and sufficiently move the rod 142, it is preferable that the rod 142 is fixed to the rod mounting portion 146 with a sufficient length secured upward. .. Therefore, as shown in FIG. 6A, the fixing member 152 of the rod 142 is attached below the upper end of the rod 142, not near the upper end.

As described above, according to the under-bridge inspection device 100B, even if there is a pier 176 protruding outside the bridge girder 174 during the under-bridge inspection, the camera 144 can be used without removing the bogie 110B from the handrail 108. It can be avoided and the inspection under the bridge can be continued.

(Fourth Embodiment)
FIG. 7 is a diagram showing the under-bridge inspection device 100C according to the fourth embodiment of the present invention. The under-bridge inspection device 100C is different from the under-bridge inspection device 100 in that the carriage 110C has three upper rollers 178a, 178b, and 178c, and each of these rollers can be separated from the traveling surface one by one. ..

The upper rollers 178a, 178b, and 178c are supported by the support members 180a, 180b, and 180c, respectively. One ends of the support members 180a, 180b, 180c are connected to the outer member 182 via a hinge 181. Therefore, the support members 180a, 180b, and 180c can rotate in the vertical direction with respect to the outer member 182 via the hinge 181. The outer member 182 is a member arranged so as to be orthogonal to the support members 180a, 180b, 180c, and as shown in the figure, the beam 184 is attached so as to protrude to the outside of the carriage 110C.

Quick release bars 190 that can be connected to the grooves 188 formed in the inner member 186 are attached to the other ends of the support members 180a, 180b, and 180c, respectively. Therefore, the support members 180a, 180b, 180c can be easily connected to the inner member 186 and further can be easily disconnected from the inner member 186 simply by operating the quick release bar 190.

The inner member 186 is a member arranged so as to be orthogonal to the support members 180a, 180b, and 180c. When the support members 180a, 180b, 180c are connected to the inner member 186 via the quick release bar 190, a frame body composed of the support members 180a, 180b, 180c, the outer member 182, and the inner member 186 is on the upper side of the carriage 110C. Is formed. By forming this frame, the upper rollers 178a, 178b, and 178c can travel with the upper surface 124 of the handrail 108 as the traveling surface.

Here, it is assumed that the pillar 192 protrudes above the handrail 108 as shown in the figure during the inspection under the bridge. In such a case, the operator first operates the quick release bar 190 of the support member 180a to release the connection between the support member 180a and the inner member 186. Next, the operator grips the support member 180a and rotates it upward with respect to the outer member 182.

As a result, the upper roller 178a can be separated from the upper surface 124 of the handrail 108, which is a running surface, as shown in the drawing, and the pillar 192 can be avoided. At this time, the remaining support members 180b and 180c are connected to the inner member 186 and form a frame together with the outer member 182. Therefore, in the carriage 110C, since the remaining two upper rollers 178b and 178c are traveling on the upper surface 124 of the handrail 108, the carriage 110C can stably travel on the handrail 108.

Subsequently, the operator moves the carriage 110C to a position where the upper roller 178a and the pillar 192 do not interfere with each other. Then, the quick release bar 190 of the support member 180a is operated to reconnect the support member 180a and the inner member 186 so that the upper roller 178a can travel on the upper surface 124 of the handrail 108. After that, the operator sequentially performs such a series of operations on the remaining support members 180b and 180c.

In this way, in the under-bridge inspection device 100C, even if the pillar 192 protrudes above the handrail 108, the upper rollers 178a, 178b, and 178c are separated from the upper surface 124 of the handrail 108, which is the traveling surface, one by one. Can be made to. Therefore, according to the under-bridge inspection device 100C, the pillar 192 can be avoided without removing the trolley 110C from the handrail 108, and the under-bridge inspection can be continued.

In the under-bridge inspection device 100C, the number of upper rollers is three, but the number is not limited to this, and four or more may be used as long as the carriage 110C can stably travel on the handrail 108. Further, although the configuration in which the three upper rollers 178a, 178b, and 178c rotate and can be separated from the traveling surface is illustrated, the configuration may be such that the three upper rollers 178a, 178b, and 178c can be separated from the traveling surface by moving in parallel using a pantograph mechanism or the like. ..

Although preferred embodiments of the present invention have been described above with reference to the accompanying drawings, it goes without saying that the present invention is not limited to such examples. It is clear that a person skilled in the art can come up with various modifications or modifications within the scope of the claims, which naturally belong to the technical scope of the present invention. Understood.

The present invention can be used as an under-bridge inspection device and an under-bridge inspection method for inspecting equipment installed on the lower surface of a bridge.

100, 100A, 100B, 100C ... Under-bridge inspection device, 102 ... Bridge, 104 ... Underside of bridge, 106 ... Equipment, 108, 158 ... Handrail, 110, 110A, 110B, 110C ... Cart, 112, 114, 178a, 178b 178c ... Upper roller, 116, 118 ... Inner roller, 120 ... Outer roller, 122 ... Upper frame, 124 ... Upper surface of handrail, 126 ... Inner frame, 128 ... Rail member, 130, 180a, 180b, 180c ... Support Members, 132, 156 ... Position fixing parts, 134, 160 ... Outer side surface of handrail 136, 162 ... Inner side surface of handrail 138 ... Worker, 140, 166, 170, 184 ... Beam, 142 ... Rod, 144 ... Camera , 146 ... Rod mounting part, 148 ... Arm, 150 ... Cloud stand, 152 ... Fixing member, 154 ... Holding part, 164 ... Tablet, 172, 181 ... Hinge, 174 ... Bridge girder, 176 ... Bridge pier, 182 ... Outer member , 186 ... Inner member, 188 ... Inner member groove, 190 ... Quick release bar, 192 ... Pillar

Claims (6)

A dolly that runs on the railing of the bridge,
The beam attached to the dolly and
A rod suspended from the beam and
It is equipped with a camera attached to the lower end of the rod and taking pictures of the equipment installed on the underside of the bridge .
The dolly
With the upper roller running on the upper surface of the handrail,
With an outer roller running on the outer side of the railing,
Equipped with an inner roller that runs on the inner side of the railing,
At least one of the outer rollers or the inner rollers can be adjusted in the disengagement direction toward the other.
An under-bridge inspection device, characterized in that one of the outer rollers or the inner rollers is composed of two rollers and the other is composed of one roller. The under-bridge inspection device according to claim 1 , wherein the outer roller and the inner roller are long rollers that are long in the vertical direction. The under-bridge inspection device according to claim 1 or 2 , wherein the upper roller, the outer roller, and the inner roller are resin rollers. The beam is installed so as to protrude from the bogie.
The under-bridge inspection device according to any one of claims 1 to 3 , further comprising a rod mounting portion for detachably fixing the rod to the tip of the beam. The beams are installed so as to protrude on both sides of the trolley.
The under-bridge inspection device according to claim 4 , wherein the rod mounting portions are provided at both ends of the beam. The under-bridge inspection device according to claim 4 or 5 , wherein the rod mounting portion can rotate in the vertical direction with respect to the carriage.

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