JPH028246Y2 - - Google Patents

Description

[Detailed description of the invention] a. Industrial application field The present invention relates to an internal inspection device, and more specifically, to a device for visually inspecting the inner surface of a cylindrical body with a shoulder such as a cylinder, that is, for visually inspecting the occurrence of scratches and rust. .

b Conventional technology When inspecting the inside of a cylinder for scratches or rust, conventionally a lighting lamp was hung from the valve screw hole at the top of the cylinder and the inside was visually checked through the hole. As shown, depending on the shape of the cylinder, the area above the line connecting the lower surface A and the upper surface B of the screw hole of the cylinder, that is, inside the shoulder part, cannot be visually seen.

c. Structure, operation and effect of the invention The present invention has been devised in view of the above points, and provides a device that can efficiently inspect the inner surface of the cylinder shoulder.

That is, the present invention includes a first lamp that faces forward at its tip, a second lamp that is spaced apart from the first lamp and faces rearward, a convex mirror that is disposed rearwardly behind the second lamp, and It is characterized by an elongated structure in which an eyepiece portion having a removable magnifying lens facing a convex mirror is successively joined, and the tip portion of the convex mirror is inserted into the inside of the cylinder to inspect the inner surface of the cylinder. This is an internal inspection device.

This will be explained below based on the drawings.

FIG. 2 is a perspective view of one embodiment of the present invention, showing the mode in use. 3 is a side sectional view of the eyepiece portion of the embodiment of FIG. 2; FIG.

In the figure, 1 is a first lamp attached to a socket 2 at the tip of the device, and 3 is a second lamp, which is fitted into a socket 4. The lamp 3 is mounted in the opposite direction to the lamp 1, that is, facing backward, and illuminates upward. 5 is a convex mirror attached to the rear of the lamp 3, that is, above the lamp 3, and is housed in a holder 6. Reference numeral 7 designates an eyepiece section of the apparatus, which is comprised of a magnifying lens 8 disposed to face the convex mirror 5, an eyepiece tube 9 housing the lens 8, and a rubber tube 10 for the eyepiece. The lens 8 is attached to a lens frame 11, and the lens frame 11 is rotatably held by a pin 12 at a fulcrum portion formed on the side surface of the cylindrical body 9. A knob 13 is formed on the lens frame 11, and the knob 13 rotates the lens frame 11 and operates the lens 8 to be detachably attached to the center of the eyepiece tube 9.

The socket 2 and the socket 4 are connected by a short tube 15, and the socket 4, the convex mirror 5, and the cylindrical body 9 are connected by a thin metal tube 16. The convex mirror 5 and the cylindrical body 9 are connected by four metal tubes 16, and the convex mirror 5 and the socket 4
Two metal pipes 16 are connected via a connector 17 between
is combined with The device having the lamp 1 at its tip is integrally connected to the eyepiece cylinder 9 at the rear end, and has an elongated structure as a whole.

Further, a handle 18 is attached to the cylindrical body 9, and a blinking switch 19 for the lamps 1 and 3 and a power cord 20 are attached to the handle 18. Electric wires for supplying power to the lamps 1 and 3 are connected to the respective sockets 2 and 4 through metal tubes 16 and short tubes 15.

When inspecting the inside of a cylinder using such a device, for example, as shown in FIG. is turned on, an image of the inner surface of the cylinder shoulder is reflected on the convex mirror 5, and this is checked through the magnifying lens 8. In this device, the light is illuminated from below the convex mirror 5, so that the inner surface of the cylinder can be seen through the convex mirror 5, which has a wide field of view, so that the inner surface of the cylinder shoulder is completely within the field of view of the convex mirror, as shown in FIG. By viewing this through the magnifying lens 8, the inner surface of the cylinder shoulder can be reliably checked.

Next, when inspecting the inner surface of the cylinder body, turn off the lamp 3, turn on the lamp 1, and use the magnifying lens 8.
Remove it from the center of the cylindrical body 9 and visually inspect it as in the conventional case.

In this manner, once the inspection device is inserted into the cylinder, the entire inner surface of the cylinder can be easily and reliably inspected by simply performing the operation of blinking the lamp and attaching/detaching the magnifying lens.

In addition, although the rubber tube for the eyepiece was used in the above-mentioned embodiment, this can be omitted depending on the case. Further, although the magnifying lens can be attached to and detached from the eyepiece tube by rotating it, the method of attaching and detaching the lens is not necessarily limited to this, and the lens may simply be placed in a detachable manner. It is also preferable that the lamp blinking switch be at hand as in the example, but it is not necessarily required to be provided on the handle; it may also be attached to the power cord.Also, it is preferable that there is a handle for carrying it, but this handle is not necessarily provided on the handle. It does not have to be the same shape or arrangement as the example.

The connection order of each lamp or socket, convex mirror, and eyepiece must be in the order shown.
However, regarding the connection method, the method of the embodiment is preferable because it causes less obstruction to the visibility during inspection, but it is not necessarily limited to this, and any method can be adopted as long as it causes less obstruction to the visibility.

Further, the device according to the present invention can be used not only for the above-mentioned cylinder but also for internal inspection of other cylindrical bodies.

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram of the conventional inspection method, Fig. 2 is a perspective view of an embodiment of the present invention in use, Fig. 3 is a side sectional view of the eyepiece of the embodiment, and Fig. 4 is the invention of the present invention. It is an explanatory diagram of the operation of the device. 1 is a first lamp, 3 is a second lamp, 5 is a convex mirror, 7 is an eyepiece, and 8 is a magnifying lens.

Claims (1)

[Scope of utility model registration request] A first lamp facing forward at its tip, a second lamp spaced from the first lamp and facing rearward, a convex mirror disposed rearwardly behind the second lamp, and a removable mirror facing the convex mirror. What is claimed is: 1. An internal inspection device characterized by having an elongated structure in which eyepieces each having a magnifying lens are connected in sequence, and the distal end portion of the convex mirror is inserted into the interior of the cylinder to inspect the inner surface of the cylinder.