JP3044921U - Sewer pipe inspection tool - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To provide a sewer pipe inspection tool capable of stably inspecting the inside of the bottom of a sewer pipe and checking the inner part of a sewer pipe in which water has accumulated without any trouble. . SOLUTION: A reflecting mirror 3 is attached to a tip 2a of an operating rod 2 so as to be variable in angle, and a tip side 3b of the reflecting mirror 3 is connected to a pipe 1 to be inspected.
An arc member having a radius R slightly smaller than the inner diameter D of 0, and an edge member for protecting an outer peripheral edge of the reflector;
This edge member is formed so that the front end portion of the reflecting mirror is wider than the other.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to a sewer pipe inspection tool for inspecting the inside of a sewer pipe buried underground.

[0002]

[Prior art]

 When inspecting the inside of a sewer pipe, a worker with a large pipe diameter can directly enter the manhole and visually recognize it.However, a standard drain pipe with a small pipe diameter is difficult to enter the manhole. Is used. This sewer pipe inspection tool generally has a rectangular reflecting mirror attached to the lower end of the operating rod so as to be variable in angle. When inspecting the inside of a sewer pipe using such a sewer pipe inspection tool, adjust the angle of the reflector in advance according to the depth to the sewer pipe, and the worker grasps the operation rod to reflect light. Insert the mirror into the manhole. By turning the mirror surface into the pipe, the sewer pipe can be visually inspected from outside the manhole.

[0003]

[Problems to be solved by the invention]

 By the way, in the above-mentioned conventional sewer pipe inspection tool, the reflecting mirror is rectangular and the sewer pipe is circular, so that when the front end is held at the center of the sewer pipe, it is unstable and it is difficult to perform proper inspection. There was a problem. Therefore, when the tip was made semicircular in accordance with the inner diameter of the sewer pipe, water usually accumulates slightly in the sewer pipe. There was a problem that it became difficult. The present invention has been made in view of the above problems, and is capable of being stably held in a sewer pipe and inspecting a sewer pipe so that a reflection surface is not easily seen even when used in a sewer pipe in which water is accumulated. It aims to provide tools.

[0004]

[Means for Solving the Problems]

 To achieve the above object, the base end of the reflector is attached to the tip of the operating rod with a variable angle, and the tip of the reflector is formed in an arc shape with a radius slightly smaller than the inner diameter of the pipe to be inspected. In addition, an edge member for protecting an outer peripheral edge of the reflector is provided, and the edge member is formed so that a front end portion of the reflector is formed wider than others.

[0005]

[Embodiment of the invention]

 Hereinafter, embodiments of the present invention will be described with reference to the illustrated examples. FIG. 1 is a perspective view showing the entire configuration of the sewer pipe inspection tool, and FIG. 2 is a front view showing a reflecting mirror of the sewer pipe inspection tool.

The sewage pipe inspection tool 1 is for inspecting a sewage pipe having a small pipe diameter, and has a configuration in which a reflecting mirror 3 is attached to an operation rod 2. The operation rod 2 is made of glass fiber pipes 2A to 2E having excellent strength, and has a total length of about 1 m to 5 m, and is freely expandable and contractable. The operation rod 2 accommodates a plurality of different-diameter pipes 2A to 2D in the large-diameter portion side, and when the pipes 2B to 2D are pulled out from 2E, they are connected to each other by a connecting portion 8. The connecting portion 8 is formed by integrating a pair of extending portions 8b with a cylindrical portion 8a, and is formed such that the inner diameter of the cylindrical portion 8a matches the outer diameter of each of the pipes 2A to 2E. The extending portion 8b extends outward from a narrow groove provided in the length direction of the cylindrical portion 8a, and has a screw hole formed in each of the extending portions. When the screw portion of the tightening screw 8c is screwed into this screw hole, the connecting portion 8 of each of the pipes 2B to 2E is firmly tightened. Reference numeral 2c denotes a cap fixed to the base end 2b on the grip side, and the reflecting mirror 3 is attached to the tip 2a.

The reflecting mirror 3 is a substantially rectangular mirror, and the tip of an arm 5 is fixed to the back surface of a case 4 serving as an edge member for holding the outer peripheral edge of the reflecting mirror 3. A shaft hole is formed in the base end 5 a of the arm 5, and the arm 5 is supported at an angle with respect to the mounting member 6. This attachment member 6 is formed by integrating a forked portion 6b with a fitting portion 6a, making the inner diameter of the fitting portion 6a equal to the outer diameter of the tip 2a side, and forming a screw hole in each extension piece of the forked portion 6b. Is formed. After the base end 5a of the arm 5 is inserted between the two extension pieces of the forked part 6b, the screw part of the wing nut is screwed into the screw hole on the base end 5a side from the screw hole of one extension piece and the other is inserted. The reflection mirror 3 is rotatably supported by being screwed into the screw hole of the extension piece. When the fitting portion 6a of the mounting member 6 is fitted to the distal end 2a of the operating rod 2, the mirror surface 3a of the reflecting mirror 3 is mounted toward the base end 2b of the operating rod 2. This makes it possible to adjust the angle so that the reflecting mirror 3 can be easily viewed while the base end 2b side of the operating rod 2 is gripped during the inspection work.

As shown in FIG. 2, the reflecting mirror 3 is held by the case 4, and has a distal end 3b formed in an arc shape and a base end 3c formed in a substantially rectangular shape. If the inner diameter D of the sewage pipe 10 to be inspected is a standard diameter of 80 mm, the reflector 3 is set to a slightly smaller radius R of 75 mm. In the case where the width of the reflecting mirror 3 is 150 mm and the total length thereof is 185 mm, a position C which is about 1/3 of the arc on the tip side 3b from the tip side 3b on the longitudinal center line is the center of the radius of curvature. The case 4 protects the reflecting mirror 3 and is formed so as to cover this back surface and hold the outer peripheral edge. The edge 4a of the case 4 has a width of about 5 mm, but only the distal end 4b for gripping the distal end 3b of the reflecting mirror 3 is formed to be about 7 mm wider than the others. This wide portion is limited within a wide angle range of about 60 ° toward the distal end 3b of the reflecting mirror 3 when the center C of the radius of curvature of the arc portion of the reflecting mirror 3 is set as the center point of the inner angle. .

As a result, the distal end 3b of the reflecting mirror 3 has an arc shape, and the distal end portion 4b of the case 4 for protecting the arc portion extends downward and is slightly longer. The sewage pipe inspection tool 1 configured as described above is used when checking the sewage pipe 10 having a small standard pipe diameter as shown in FIG. When the sewer pipe 10 buried in the ground extends horizontally from the bottom 10b side of the manhole 9, the worker M adjusts the distance between the upper opening 9a and the bottom face 10b of the sewer pipe 10 according to the distance. Adjust the length of. Further, the angle of the reflecting mirror 3 is also adjusted so that the mirror surface 3a of the reflecting mirror 3 is directed to the opening 10a side of the sewer pipe 10. Then, the worker M grips the base end 2b side of the operation rod 2 and inserts the reflecting mirror 3 through the upper opening 9a of the manhole 9, and attaches the mirror surface 3a of the reflecting mirror 3 to the opening 10a side of the sewage pipe 10 to be inspected. The tip 4b of the case 4 contacts the bottom surface 10b of the sewer pipe 10 toward the bottom.

The distal end portion 4b of the case 4 has an arc shape with a radius of curvature slightly smaller than the inner diameter of the sewer pipe 10, so that it can be contacted along the bottom surface 10b without any gap. Further, when the sewage W as shown in FIG. 2 remains on the bottom surface 10b and the bottom surface of the sewage pipe 10, the distal end portion 4b is widened in consideration of the depth of the sewage W. Even when the distal end portion 4b is immersed in the sewage W, almost all of the mirror surface 3a is above the surface of the water when the distal end 3b of the reflecting mirror 3 is slightly flooded. Therefore, the inside is reflected on the mirror surface 3a, and the worker M can inspect the inside of the pipe. At this time, since the distal end 4b of the case 4 contacts the bottom surface 10b and the distal end 3b of the reflecting mirror 3 does not immerse in the water surface, the sewage W is hardly obstructed by visual observation, and can be sufficiently viewed deep inside. The water pipe 10 can be reliably inspected.

[0011]

[Effect of the invention]

 As described above, in the present invention, the base end side of the reflector is attached to the lower end of the operating rod so as to be variable in angle, and the distal end side of this reflector is formed in an arc shape with a radius slightly smaller than the inner diameter of the inspection pipe. If the pipe to be inspected is a sewer pipe, the tip side of the reflector can be in contact with the bottom surface, and the reflector can be stably held. In addition, there is an edge member that protects the outer peripheral edge of the reflector, and this edge member is formed wider at the tip side of the reflector than the others, so that the reflecting surface is contaminated by water that has collected slightly in the sewer pipe. There is no inspection and it can be surely inspected.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a sewer pipe inspection tool according to an embodiment of the present invention.

FIG. 2 is a front view showing a reflector of a sewer inspection tool disposed on the sewer.

FIG. 3 is an explanatory view showing a sewer pipe inspection operation using a sewer pipe inspection tool.

[Explanation of symbols]

 2 Operation rod 2a Lower end 3 Reflector 3b Tip side 10 Tube to be inspected

Claims (1)

[Utility model registration claims] 1. A base end of a reflecting mirror is variably attached to a distal end of an operation rod, and a distal end of the reflecting mirror is formed in an arc shape having a radius slightly smaller than an inner diameter of a tube to be inspected.
A sewer pipe inspection tool, comprising: an edge member that protects an outer peripheral edge of the reflector, wherein the edge member is formed so that a front end portion of the reflector is wider than others.