JP2011185629A - Inspection tool and inspection method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an inspection tool obtaining information such as exact cracking width on an inner surface in any direction (up and down, right and left) of a hole, and accurately inspecting the injection condition of an injection material. <P>SOLUTION: This inspection tool includes: a tube 15 for housing a rod lens 10, a transmission line 11 and a mirror 13, which has a window 14 for output of light from the mirror 13 and for input of reflected light to the mirror 13, supports the mirror 13 to arrange the mirror 13 on a center line which is at the same distance from both one wall surface in a hole 20 and another wall surface facing the one wall surface, and is inserted into the hole 20; and a support ring 16 attached in the tube 15 for supporting the rod lens 10 and the transmission line 11 so as to arrange the rod lens 10 on the center line. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention is carried out by using an inspection tool used for inspecting an internal deterioration state of a structure and confirming an injection state when an injection material is injected to repair the structure, and the inspection tool. It relates to the inspection method.

  Concrete is used when constructing houses, buildings, tunnels, dams, sluices, bridges, etc. Concrete is manufactured by blending cement, aggregate, water and admixture, and its strength is determined by the water-cement ratio. By changing this water cement ratio, concrete of various strengths can be produced.

  The concrete produced in this manner is driven using a mold before it hardens, and is cured for a predetermined time inside the mold. At the time of driving, a vibrator and a wood plank are used to sufficiently remove the air contained in the concrete, eliminating unfilled portions and preventing defects such as cold joints and cracks.

  However, concrete is affected by the building environment, and may expand and contract due to changes in temperature and humidity, resulting in cracks. In addition, acid rain may cause softening or destruction due to chemical changes in cement hydrate.

  For such a cracked structure, an operation of filling the defective portion with the injection material is performed, and in this operation, it is confirmed whether or not the injection material is filled to a predetermined position. ing. Conventionally, as one of the confirmation methods, the amount of injected material was calculated from the difference between the amount of injected material before injection and the remaining amount of injected material after the injection work, and was filled to the target position. There is a method of roughly judging whether or not.

  In general, it is difficult to grasp the state of internal defects in members and structures, and in the case of crack injection, only the surface crack width and the approximate depth of the crack are known before the injection work. If you try to manage the injection status based on the injection volume with only this information, if the internal crack width is wider on the surface or if it is branched inside the crack, stop the injection before injecting to the target position. In some cases, it is inappropriate for quality control of an injection method in which an injection material is injected and repaired.

  As another method, there is a method of checking a filling state by sampling (coring, etc.) a defective portion containing an injection material after the injection operation and observing the sampled sample. For example, there is a method of injecting an injection material containing a fluorescent agent into a crack, removing the core, and irradiating the extracted core with black light to check the injection state. Core removal is performed using a core removal machine that removes a cylindrical concrete core by rotating in the thickness direction of the concrete while rotating a hollow cylindrical member provided with a blade at the tip.

  This core removal is sampled from a member or a structure, and the injection state is confirmed by visual observation from the sample, so that the injection state can be accurately grasped. However, in this core removal, since the diameter of the hollow cylindrical member of the core removal machine is as large as about 50 mm to 250 mm, there is a problem that the rebar is cut in the case of reinforced concrete. Further, since the core removal machine is a large-scale device, there is a problem that it takes time to move and use the core removal machine. Furthermore, since the extracted core is large, there is a problem that a large-scale repair is required after confirmation in order to fill the hole. Further, since the core removal is an operation while using water, the fluorescent agent is washed away together with the injection material, and there is a problem that the crack situation cannot be determined.

  Therefore, a method has been proposed in which an inspection hole for internal inspection is drilled in a concrete structure, an optical fiber scope or a micro CCD camera is inserted into the inspection hole, and the interior is inspected by remote image observation ( For example, see Patent Document 1). In this method, since it is only necessary to drill a small inspection hole, there is no need to perform core removal, a core removal machine is unnecessary, there is no problem of cutting the rebar, and large-scale repair is also unnecessary.

  Also, a method has been proposed in which a perforated part is formed in a concrete structure, an endoscope is inserted into the perforated part, and deterioration of the concrete in the depth direction is observed through the endoscope (for example, Patent Document 2, 3). Also in this method, it is only necessary to form a small perforated portion. Therefore, it is not necessary to perform core removal, the core removal machine is unnecessary, the problem of cutting the reinforcing bar is eliminated, and large-scale repair is also unnecessary.

JP-A-8-29413 JP 2001-227925 A JP 2008-203275 A

  By using an optical fiber scope, CCD camera, and endoscope, you can see the front in the direction of insertion in the drilled hole, and you can also see the top, bottom, left, and right inside the hole by using a prism or mirror. be able to. Generally, the diameter of the hole to be drilled is set to a size that allows an optical fiber scope, a CCD camera, and an endoscope to be inserted with a sufficient margin, and is inserted along the lower side of the hole. Therefore, in conventional fiber optic scopes, CCD cameras, and endoscopes, the focal length differs between the case of looking at the upper side and the case of looking at the lower side, and the exact size of the crack cannot be measured. I could not get any information. For this reason, the injection | pouring condition at the time of inject | pouring an injection material was not able to test | inspect correctly.

  As a result of intensive studies, the inventors of the present invention have arranged a mirror that projects the upper wall surface and the lower wall surface on the center line where the distance from the upper wall surface in the hole is equal to the distance from the lower wall surface, and the center By providing a support ring that supports a rod-shaped lens or a plurality of lenses arranged in a line on the line, accurate information can be obtained, and accurate inspection can be performed even in the injection state of the injection material. I found.

  This invention is made | formed by discovering the above, The said subject can be solved by providing the test | inspection tool and test | inspection method of this invention.

  That is, the inspection tool of the present invention includes a rod-shaped lens or a plurality of lenses arranged in a line, a transmission path that is provided so as to cover the outer periphery of the lens, and a light source device that inputs light to the transmission path. , A mirror that irradiates light emitted from the transmission path toward the wall surface in the hole and makes reflected light from the wall surface enter a rod-shaped lens or a plurality of lenses arranged in a row, and a rod-shaped lens or a plurality of devices arranged in a row The lens, the transmission path, and the mirror are housed, the light is emitted from the mirror and the reflected light is incident on the mirror, and the distance from one wall surface in the hole is opposed to the one wall surface. Supporting the mirror so that the mirror is arranged on the center line having the same distance from the other wall surface, a tube inserted into the hole, and a rod-shaped lens arranged in a line on the center line. Multiple records As's are arranged and a support member for supporting the lens and the transmission path.

  The light source device can comprise either a light bulb, a fluorescent lamp or a light emitting diode (LED). The light source device can be replaced according to the inspection contents. When inspecting the deterioration status such as crack width, use a light bulb, fluorescent lamp, or LED. When checking the injection status of the injection material, the injection material An ultraviolet LED that reacts with the fluorescent agent contained in the LED can be used.

  The inspection tool further receives a light incident on the lens and converts the light into an electric signal, an image processing unit that performs image processing on the converted electric signal and outputs image data, and an image An imaging device including display means for displaying an image based on the data can be included.

  In the present invention, a method for inspecting a structure using the inspection tool can be provided. The method includes a step of forming a hole in the structure by a hole drilling means, and a tube of the inspection tool in the formed hole. A step of irradiating light from the light source device provided in the inspection tool toward the wall surface of the hole through the transmission path and the mirror in the tube, and the reflected light reflected on the wall surface through the mirror and the lens The method includes a step of receiving light and displaying as an image, and a step of rotating the tube. After the rotating step, an irradiating step and a displaying step can be executed.

  The method also includes a step of injecting an injection material containing a fluorescent agent from a crack formed in the structure or a hole formed in the structure.

  When the injection state of the injection material is inspected, the method further includes a step of replacing the light source device. After the replacement step, an irradiation step, a display step, and a rotation step are executed. At this time, the step of forming the hole inclined with respect to the direction in which the crack formed in the structure extends by the drilling means can be executed, and the tube of the inspection tool is inserted into the inclined hole, and the above-mentioned replacement is performed. A step, an irradiating step, a displaying step, and a rotating step can be executed. And when it is confirmed that injection is inadequate, the injection material containing said fluorescent agent can be inject | poured using the inclined hole as an injection hole.

The figure which showed one structural example of the test | inspection tool of this invention. Sectional drawing which expanded and showed the front-end | tip part of the test | inspection tool shown in FIG. The figure which showed another structural example of the test | inspection tool of this invention. The figure which illustrated the place which is inspecting a structure using an inspection tool.

  Since the inspection tool of the present invention can match the focal length with respect to the top, bottom, left, and right in the hole, it is possible to accurately measure the size of the crack width, etc. in any of the top, bottom, left, and right. An accurate injection status can be confirmed.

  FIG. 1 is a view showing one configuration example of the inspection tool. The inspection tool includes a rod-shaped lens 10, a transmission path 11 that is provided so as to cover the outer periphery of the rod-shaped lens 10, and a light source device 12 that inputs light to the transmission path 11.

As the rod-shaped lens 10, a selfoc rod lens whose refractive index continuously changes can be adopted. This Selfoc rod lens has a function of bending and collecting light by a refractive index distribution, and is manufactured by subjecting a rod-shaped glass material to an ion exchange treatment. For example, it can be produced by immersing a rod containing Li ₂ O and Na ₂ O in NaNO ₃ molten salt to cause ion exchange between Li ⁺ and Na ^+, and gradually cooling it.

  In this lens, light is imaged every ½ wavelength and travels in a sine wave shape with a period of one wavelength.

  The transmission path 11 may employ a light guide fiber that can transmit light such as ultraviolet rays, visible light, infrared rays, and laser beams. When a fiber is used, a bundle fiber obtained by bundling a large number of thin fibers or a single large-diameter fiber can be used.

  The light source device 12 inputs light to the transmission path 11, but inputs it to a light guide cable connected to the light guide fiber that is the transmission path 11, and inputs light to the transmission path 11 via the light guide cable. it can. The light source device 12 can include a lamp serving as a light source and a mirror for collecting light emitted from the lamp in one direction. Examples of the lamp include a light bulb, a fluorescent lamp, and an LED.

  When inspecting a deterioration state such as a crack width formed in the structure 1, since the injection material is not injected and the inside is dark, a light bulb, a fluorescent lamp, and a white LED can be used. For example, a penlight having these light sources can be employed.

  When an injection material is injected to repair the crack 2 and the injection state is confirmed, when the injection material contains a fluorescent agent, an ultraviolet LED that reacts with the fluorescent agent can be used. When a fluorescent agent is not included, the above-mentioned light bulb, fluorescent lamp, and white LED can be used as they are.

  The injection material is sodium silicate, silica resin-based injection material based on isocyanate, polyol, urethane foam-based injection material based on isocyanate, cement (mortar) -based injection material, and epoxy resin as the main component. An epoxy resin-based injection material can be used. Further, as the injection material, an injection material colored in a color tone greatly different from the color tone of the structure 1 can be used. As a result, it is possible to accurately specify the position of the injection material that has been easily misidentified. A colorant can be used for coloring, and examples of the colorant include pigments mainly composed of iron hydroxide, lead chromate, zinc chromate, titanium dioxide, and the like.

  As the fluorescent agent, a fluorescent pigment can be used. As the fluorescent pigment, for example, calcium, magnesium, barium, zinc, cadmium oxide, sulfide, silicate, phosphate, tungstate are the main components. In addition, 0.01% to 1% manganese, silver, copper, antimony, and lead added as an activator and then fired can be used. In addition to the inorganic fluorescent pigments described above, organic fluorescent pigments can also be used as the fluorescent pigment. Examples of organic fluorescent pigments include diaminostilbene dyes, fluorescein, thioflavine, eosin, rhodamine B, and the like. be able to.

  Said inspection tool irradiates the light radiate | emitted from the transmission path 11 toward the wall surface of the upper, lower, left, and right in the hole 20 formed in the structure 1 using light cutting means, such as a drill, The wall surface The mirror 13 for reflecting the reflected light reflected on the rod-shaped lens 10, the rod-shaped lens 10, the transmission path 11 and the mirror 13 are housed, the light from the mirror 13 is emitted, and the reflected light is incident on the mirror 13. It has a window 14 and is indicated by a one-dot chain line in which the distance from one wall surface in the hole 20, for example, the upper wall surface 21 is equal to the distance from another wall surface facing the one wall surface, for example, the lower wall surface 22. The mirror 13 is supported so that the mirror 13 is arranged on the center line, the tube 15 to be inserted into the hole 20, and attached to the tube 15, and the rod-shaped lens 10 is arranged on the center line. Rod lens 0 and further comprising a support ring 16 as a supporting member for supporting the transmission line 11.

  The mirror 13 is inclined and fixed at about 45 ° with respect to the longitudinal direction of the tube 15, and the upper, lower, left and right wall surfaces in the hole can be inspected by rotating the tube 15 by a predetermined angle in the circumferential direction. . For example, when the upper wall surface 21 is inspected and the left wall surface is inspected, the lower wall surface 22 is inspected by rotating 90 ° to the left and rotating the right wall surface 90 ° to the right when inspecting the right wall surface. When doing so, each wall surface can be inspected by rotating 180 °.

  Further, the mirror 13 may be arranged so as to be inclined with respect to the longitudinal direction of the tube 15, and the inclination angle thereof may be changed. As a method of changing the tilt angle, a support shaft is provided at the center of the back surface of the mirror 13, and the mirror surface is rotated from a position facing the upper wall surface 21 to a position facing the lower wall surface 22 around the support shaft. Can be changed.

  The tube 15 is provided with a window 14 near the distal end in the insertion direction, and can irradiate light through the window 14 and receive reflected light. The window 14 can have an appropriate size and shape in consideration of the viewing angle, and two or more windows can be provided as necessary.

  The tube 15 can be, for example, a stainless steel pipe. When forming a hole using a drill as a drilling means, if the drill diameter is 14 mm, the outer diameter is slightly smaller than 13.8 mm. A / 4 inch tube can be employed.

  The rod-shaped lens 10 and the transmission path 11 may be covered with a stainless steel tube and integrally formed. The stainless steel tube can be supported on the center line by the support ring 16. The support ring 16 is provided with a hole in the center so that the central axis of the rod-shaped lens 10 is located on the center line, and a stainless steel tube is inserted into the hole to dispose the support lens 16. The rod-shaped lens 10 can be fixed so that the central axis of the rod-shaped lens 10 is on the center line.

  FIG. 2 is an enlarged cross-sectional view of the distal end portion of the inspection tool shown in FIG. The distal end portion of the inspection tool has a shape in which the tube 15 is not hollow cylindrical but has a flat portion 15a in a part thereof, and a window 14 having a predetermined size and shape is formed in the flat portion 15a. Moreover, the tip of the tube 15 is closed so that dust, latency, shavings, etc. do not enter the tube 15.

  The mirror 13 is disposed below the window 14 formed in the flat portion 15 a so that the mirror surface is inclined by about 45 ° with respect to the longitudinal direction of the tube 15. The mirror 13 is located on the center line of the substantially cylindrical hole 20 formed, that is, at a position where the distance from the upper wall surface 21 of the hole 20 is equal to the distance from the lower wall surface 22 facing the upper wall surface 21. It is arrange | positioned so that the center of may be located. Further, the rod-shaped lens 10 is also arranged so that the central axis of the rod-shaped lens 10 is positioned on this center line.

  The rod-shaped lens 10 is provided with a transmission path 11 so as to cover the outer periphery thereof, and the outer periphery of the transmission path 11 is covered with a stainless steel tube 17. The stainless steel tube 17 is disposed in the tube 15 by the support ring 16 so that the central axis of the rod-shaped lens 10 is located on the central line.

  The rod lens 10 and the distal end of the transmission path 11 are separated from the mirror surface of the mirror 13 by a predetermined distance, and the light transmitted through the transmission path 11 is emitted from the distal end of the transmission path 11, so that the rod lens 10 Reflected light is incident on the tip from the mirror 13.

  Here, the method of using the inspection tool will be briefly described. The tube 15 is inserted into the hole formed in the structure 1, the light source device 12 is turned on, and the light emitted from the light source device 12 is transmitted to the transmission line 11. The mirror 13 emits the light to the upper wall surface 21 in the hole 20 through the window 14 while changing the direction by about 90 °.

  The image is projected onto the mirror 13 on the upper wall surface 21 irradiated with light. At this time, the reflected light reflected on the upper wall surface 21 is incident on the mirror 13, and the mirror 13 reduces the reflected light to about The light is incident on the tip of the rod-shaped lens 10 by changing the direction of 90 °.

  In the rod-shaped lens 10, the incident reflected light forms an image every ½ wavelength and proceeds in a sine wave shape with a period of one wavelength. An eyepiece lens can be provided at the end of the rod-shaped lens 10 and can be enlarged to a predetermined size by the eyepiece lens. By looking at this eyepiece, an image of the upper wall surface 21 can be seen, and an inspection can be performed.

  The inspection tool is not limited to the configuration shown in FIG. 1, and can further include a digital camera or the like as an imaging device, as shown in FIG. It is also possible to use an RGB sensor that captures only a specific color tone as a digital signal.

  The imaging device receives light incident on the rod lens 10 and receives a CCD image sensor 30 as a light receiving means for converting the light into an electric signal, and performs image processing on the converted electric signal and outputs image data. Means and display means for displaying an image based on the image data. The image processing means is composed of a memory 31 and a CPU 32, and the CPU 32 reads out and executes a program stored in the memory 31, and can function as an image processing means. The display means is a liquid crystal display 33 or the like, and displays an image based on the image data processed and output by the CPU 32.

  Since the electrical signal converted by the CCD image sensor 30 is an analog signal, an A / D converter can be provided, converted into a digital signal, and sent to the CPU 32. Although the CCD image sensor 30 is illustrated here, a CMOS (complementary metal oxide semiconductor) image sensor may be used.

  The CPU 32 performs processing such as interpolation, color space conversion, and gamma characteristic conversion on the data converted into the digital signal by the A / D converter, and converts the data into digital data such as JPEG or RAW. This digital data can be recorded on a recording medium such as an SD card. The recording data can be directly taken into a PC or the like from the imaging device via a cable and displayed on a display screen of the PC or analyzed. It is also possible to store it as data for use in a PC or the like.

  Although the inspection tool has been described in detail so far, a method for inspecting the structure 1 using this inspection tool will be described below. Structures 1, such as buildings, dams, tunnels, bridges, sluices, etc., are concrete structures. Concrete is affected by the building environment and may expand and contract due to changes in temperature and humidity, resulting in cracks 2. In some cases, acid rain may cause softening or destruction due to chemical changes in cement hydrate. If left as it is, there is a risk that the crack width increases, the structure 1 is damaged, and eventually collapses.

  For this reason, an injecting material is injected to inspect the deterioration state such as the crack width or to repair the crack 2, and this inspection tool is used to check the injection state.

  An inspection method using this inspection tool will be described with reference to FIG. In order to inspect the crack width formed in the structure 1, a hole 20 having a predetermined diameter is formed on the surface of the structure 1 using a drilling means 40 such as a drill as shown in FIG. For example, a hammer drill having a drill diameter of about 14 mm can be used to form the hole 20 having a diameter of about 14 mm. The depth of the hole 20 can be set to a length allowing the tube 15 of the inspection tool to be inserted, and can be set to 50 cm, for example.

  Next, as shown in FIG. 4B, the tube 15 of the inspection tool is inserted, the light source device 12 is turned on, and the upper side of the hole 20 through the transmission path 11, the mirror 13 and the window 14 in the tube 15. The wall surface 21 is irradiated with light. The light varies depending on the shape of the window 14, and if the window 14 is large, the light is greatly diffused and can irradiate a wide range of the upper wall surface 21. However, the amount of light becomes small. On the other hand, when the window 14 is small, light is concentrated and irradiated, and a narrow range of the upper wall surface 21 is irradiated with a large amount of light.

  The shape of the upper wall surface 21 irradiated with light is reflected on the mirror 13 and the image is transmitted through the rod lens 10. More specifically, the reflected light reflected on the upper wall surface 21 passes through the mirror 13. Is incident on the rod-shaped lens 10.

  When an eyepiece lens and an imaging device are provided at the end of the rod-shaped lens 10, the reflected light is converted into an electrical signal by a light receiving means provided in the imaging device, then subjected to image processing and displayed as an image on the display means. The

  The inspection in the hole 20 is not limited to the upper wall surface 21 but must be performed on the lower wall surface 22 and the left and right wall surfaces. Therefore, by rotating the tube 15 while the tube 15 is inserted into the hole 20 Similar images can be displayed on these wall surfaces.

  In the inspection of deterioration conditions such as crack width, it is preferable that the inside of the hole 20 is brighter. Therefore, the light source device 12 can be a penlight using a light bulb, a fluorescent lamp, a white LED, or the like as a light source. On the other hand, in the confirmation of the injection state of the injection material, if there is a part where the injection of the injection material is incomplete, damage will occur from that part, so that the injection can be performed while checking that there is no incomplete part In addition, an injection material containing a fluorescent agent is used. In this case, the light source device 12 may be a light source device that uses an ultraviolet LED that reacts with a fluorescent agent as a light source.

  After confirming the depth, width, etc. of the crack 2 as described above, the approximate injection amount of the injection material can be grasped from these pieces of information. The grasp of the injection amount is important in the determination of the construction period and the integration.

  Next, an injection material is injected and the injection state is confirmed. As the injection method for the injection material, the Bix method can be adopted. Specifically, first, the surface treatment is performed by removing dust and latency along the crack 2 with a disk sander, a wire brush or the like. Next, a fixture for fixing an injector for injecting the injection material is attached to the surface of the surface-treated structure 1 or the like, and the crack 2 is sealed with a sealing material.

  Thereafter, an injector containing an injection material containing a fluorescent agent is attached to the fixture, and the injection material containing the fluorescent agent is injected into the cracked portion 2 by press-fitting the injection material containing the fluorescent agent. The injector is provided with a rubber tube. When the rubber tube swells to the full inner surface of the injection amount limiting cylinder of the injector, the injection is stopped, and the injection can be performed to the next injection port to perform the same injection. After curing, the curing curing can be confirmed by simply touching the rubber tube. If cured, remove the fixture and flatten the sealed part with a disk sander etc. to crack. Complete the repair of 2.

  As described above, the injection material can be directly injected into the crack 2, but it is also possible to inject the injection material using the previously formed holes 20. In this case, since it injects from the deep part of the crack 2, an injection material can be spread more deeply and an unfilled location can be reduced.

  In order to confirm the injection state of this injection material, first, a hole that is inclined with respect to the direction in which the crack 2 formed in the structure 1 extends is separately formed by the hole drilling means 40. Next, the tube 15 is inserted into the formed hole, the light source device 12 is switched on, and the image is displayed on the display means of the imaging device.

  This hole is inclined with respect to the direction in which the crack 2 extends, and the depth direction of the structure 1 so that the injection state can be confirmed from the portion without the crack 2 around the crack portion generated on the surface. It is formed so as to intersect with the crack 2 extending in the direction.

  When the injection of the injection material is started, the injection material slowly permeates into the inside of the portion where the crack 2 has occurred, and the crack 2 is present on at least a part of the upper, lower, left and right wall surfaces of the hole. By confirming 2, it is possible to confirm the injection status. Specifically, it is replaced with a light source device using ultraviolet LEDs as a light source, ultraviolet rays are irradiated from the inspection tool, and the fluorescent agent contained in the injection material injected into the crack 2 absorbs the ultraviolet rays and emits visible light. By confirming that the crack 2 shines in a fluorescent color, it can be confirmed that the injection material is appropriately injected.

  At this time, when the crack 2 does not shine in the fluorescent color and it is confirmed that the injection material is not properly injected, the hole can be used as the injection hole and the injection material can be injected from the hole. Thereby, it can inject | pour into the unfilled crack 2 reliably, and can also inject | pour an injection material into a deeper part. Thereafter, in the same manner as described above, another hole is formed again, and it can be confirmed whether or not the injection material is appropriately injected with the inspection tool.

  In the present invention, a hole having a smaller diameter than that of the core is formed, and the hole is used for inspection and confirmation, and further, the injection material is injected. Therefore, the degree of damage is small and the hole can be easily drilled. . This leads to the formation of a large number of holes, and it is possible to improve the inspection accuracy and the accuracy of injection management accompanying the increase in the position for checking the injection material. In addition, since the hole diameter is small, there is an advantage that the repair for filling the hole after the inspection and confirmation is completed is easy and the amount of the repair material can be reduced.

  Further, by using an injection material having a color tone greatly different from the color tone of the structure 1, the position of the injection material that has been easily misidentified can be accurately specified. And when it is confirmed that it is unfilled, the hole can be used as an injection hole, and the injection material can be injected into a deeper portion.

  The inspection tool of the present invention and the inspection method using the inspection tool have been described in detail with reference to the embodiments shown in the drawings, but the present invention is not limited to the above-described embodiments. Other embodiments, additions, changes, deletions, and the like can be changed within the scope that can be conceived by those skilled in the art, and as long as the effects and effects of the present invention are exhibited in any aspect, the scope of the present invention is included. It is included.

DESCRIPTION OF SYMBOLS 1 ... Structure, 2 ... Crack, 10 ... Rod-shaped lens, 11 ... Transmission path, 12 ... Light source device, 13 ... Mirror, 14 ... Window, 15 ... Tube, 15a ... Planar part, 16 ... Support ring, 17 ... Stainless steel tube 20 ... hole, 21 ... upper wall surface, 22 ... lower wall surface, 30 ... CCD image sensor, 31 ... memory, 32 ... CPU, 33 ... liquid crystal display, 40 ... hole forming means

Claims (7)

An inspection tool for inspecting the inside of a structure,
A rod-shaped lens or a plurality of lenses arranged in a line;
A transmission path that is provided so as to cover an outer periphery of the rod-shaped lens or the plurality of lenses arranged in a row, and transmits light;
A light source device for inputting light to the transmission path;
A mirror that irradiates the light emitted from the transmission path toward the wall surface in the hole, and reflects the light from the wall surface to the rod-shaped lens or the plurality of lenses arranged in a row; and
The rod-shaped lens or a plurality of lenses arranged in a row, the transmission path, and the mirror are accommodated, and a window for emitting light from the mirror and allowing reflected light to enter the mirror is provided. A tube inserted into the hole, supporting the mirror so that the mirror is disposed on a center line where the distance from one wall surface of the mirror and the distance from the other wall surface facing the one wall surface are equal.
A support member attached to the tube and supporting the rod lens or the plurality of lenses arranged in a row and the transmission path so that the rod lens or the plurality of lenses arranged in a row is arranged on the center line. And an inspection tool.   The said light source device is provided with either a light bulb, a fluorescent lamp, or a light emitting diode (LED), and can be replaced | exchanged according to the content of a test | inspection.   The inspection tool receives light incident on the rod-shaped lens or a plurality of lenses arranged in a row and converts it into an electrical signal, performs image processing on the converted electrical signal, and outputs image data The inspection tool according to claim 1, further comprising an imaging device comprising image processing means for performing display and display means for displaying an image based on the image data. An inspection method for inspecting the inside of a structure,
Forming holes in the structure by means of drilling means;
A rod-shaped lens or a plurality of lenses arranged in a line, a transmission path, and a mirror provided in the inspection tool are accommodated in the formed hole, and light from the mirror is emitted, and reflected light is incident on the mirror. And a tube for supporting the mirror so that the mirror is disposed on a center line where the distance from one wall surface in the hole is equal to the distance from the other wall surface facing the one wall surface. A step of inserting
Irradiating light from the light source device included in the inspection tool toward the wall surface of the hole via the transmission path and the mirror in the tube;
Receiving the reflected light reflected on the wall surface through the rod-shaped lens or a plurality of lenses arranged in a line by the mirror and the support member, and displaying it as an image;
Rotating the tube to display an image of another wall surface of the hole.   The test | inspection method of Claim 4 including the process of inject | pouring the injection material containing a fluorescent agent from the crack formed in the said structure, or the said hole formed in the said structure.   6. The inspection method according to claim 5, further comprising a step of forming, by the drilling means, a hole inclined with respect to a direction in which the crack formed in the structure extends in order to confirm the injection state of the injection material. .   Further, the method includes a step of replacing a light source device, and after the replacing step, the tube is inserted into the inclined hole in the inserting step, and after the tube is inserted, the step of irradiating, the step of displaying, The inspection method according to claim 6, wherein the rotating step is executed.