JPS61112117A - Image fiber provided with direct and side observation devices - Google Patents

Abstract

PURPOSE:To switch a visual field optionally without bending an image fiber body by rotating a direct observation device fixed on the leading end of a hollow cylinder and a side observation device on the optical axis of the cylinder respectively by driving mechanisms. CONSTITUTION:The hollow cylinder 10 loading the direct and side observation prisms 11, 12 on its leading end part is held by a holding case 13. When an indirect observation rotary shaft 16 is rotated in accordance with the rotation of a rotor 18 on the hollow cylinder side, the prism 12 fixed on the leading end of an output shaft 23 optionally rotates on the optical axis of an image fiber 14 at a low speed through a reduction gear 21. When a direct observation rotary shaft 30 is rotated in accordance with the rotation of a rotor 32 on the holding case 13 side, the prism 11 fixed on the leading end of the hollow cylinder 10 fixed to the output shaft 37 of a reduction gear 35 rotates around the optical axis. Consequently, the visual field can be switched without bending the image fiber body 14 and the durability of the fiber can be improved.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to an image fiber, and in particular to an image fiber equipped with a direct viewing and side viewing device.

[Technical background of the invention and its problems] Image fibers are used for inspecting the inside of various piping and monitoring equipment of atomic couplants. Conventional image fibers are composed of multiple optical fibers bundled together.
To inspect the inside of a pipe, etc., it is necessary to move a lens attached to the tip of an image fiber, and a method used to move this lens is to bend the image fiber body to change the field of view. This will be explained with reference to the drawings.

FIG. 4 is a schematic cross-sectional view of a conventional image fiber. 4, telescopic motors 5a, 5b and lens 4 installed inside the cover 2.
Wires 5a transmitting the driving force of motors 5a and 5b to
5b are the main components.

Pulley fixing bases 7ml and 7bl are fixed to one side end face of the cover 2 with the image fiber body 3 sandwiched therebetween, and pulley fixing bases 7"fi+7"8 and 7 are fixed to the upper and lower end faces of the cover 2, respectively. b B+ 7 bB is fixed. And these pulley fixing bases 7a1.7
A2+7mB and 7b1.7b2.7bB each have a pulley gap.

gag, 8a9 and 8b1.8b! , SBS is installed.

Motors 5a and 5b are fixed to the other side end surface of the cover 2 with the image fiber main body 3 sandwiched therebetween.

Both ends of the drive wire 6a provided on the upper side of the image fiber main body 3 are attached between the lens 4 fixed to the tip of the image fiber main body 3 and the motor 5a via pulleys 8al, 5aIIl 8a8, and Drive wire 6b provided below the image fiber main body 3
Both ends of the lens 4 are fixed to the tip of the image fiber main body 3 via pulleys 8bl, 8bz, and BbB.
When the wire 6m is wound around the wire take-up pulley 9a by driving the motor 5a, for example, the image fiber main body 3 is rotated as shown in FIG. 5 by the tensile force of the wire 6a. Since it is curved upward as shown, the direction of the lens 4 fixed to the tip of the image fiber main body 3 can be changed.

As mentioned above, the image fiber body is often used in a curved manner for inspecting the inside of various piping and monitoring equipment in an atomic coupler, so there is a risk that the image fiber body may be damaged and images may not be transmitted. However, conventional image fibers have had problems in terms of durability, etc.

[Object of the Invention] The present invention has been made in view of the above circumstances, and its purpose is to provide a direct viewing device in which the field of view can be changed by rotating the direct viewing device and the side viewing device without bending the image fiber body. - To provide an image fiber equipped with a side viewing device.

[Summary of the Invention] In order to achieve the above object, the present invention includes a hollow cylinder, a companion hollow cylinder holding casing connected to the rear end of the hollow cylinder,
an image fiber body disposed in the center of the hollow cylinder and the hollow cylinder holding housing; a telescope lens disposed at the tip of the image fiber body; and a direct viewing device disposed at the tip of the hollow cylinder. a side-viewing device disposed in front of the lens; and a rotational drive device capable of rotating the direct-viewing device and the side-viewing device concentrically about the optical axis of the lens. The present invention relates to an image fiber equipped with a direct viewing device and a side viewing device. Prisms or reflectors are used as direct viewing devices and side viewing devices.

[Embodiments of the invention] An embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is a schematic side view showing the arrangement of components of an image fiber according to an embodiment of the present invention. As shown in the figure, a direct viewing prism 11 is fixed to the tip of the hollow cylinder 10, and a side viewing prism 1 is fixed to the tip.
2 is provided rotatably in the circumferential direction. Furthermore, a hollow cylinder holding housing 13 is connected to the rear end of the hollow cylinder 10 so as to be rotatable in the circumferential direction.

FIG. 2 shows a side sectional view of the rotating device for the side-viewing prism 12. An image fiber main body 14 is inserted into the center of the hollow cylinder lO, and the tip of the image fiber main body 14 is Lens 15 is fixed. Further, a direct viewing prism 11 is fixed to the tip of the hollow cylinder lO. The side-view rotation shaft 16 is provided with a bearing 17I on the outer periphery of the image fiber body 14 so as to have a certain gap so as not to come into contact with the image fiber body 14:
Therefore, rotatable C: held. This side view rotation axis 1
A rotor 18 of a rotary drive motor is fixed to 6.
A stator 19 of a rotary drive motor is attached to the outer periphery of this rotor 18.
is fixed to the inner circumference of the hollow cylinder 10 by a stopper 20.

Further, a reducer 21 is fixed to the tip of the side-view rotating shaft 16, and an input shaft 22 of the side-view rotating shaft 16 and the reducer 21 is fixed.
There is a connection. A side-viewing prism fixing plate 24 is fixed to the output shaft of the reducer 21, and the side-viewing prism 12 is fixed to this side-viewing prism fixing plate 24.

Further, power is supplied to the rotor 18 by a brush 5 provided on the stator 19, and this brush 25 is supplied with electric power #i! One end of the image fiber 26 is connected, and the other end is connected to the electric wire 4 built into the image fiber main body 14 via a slip ring 27. The rotating side of the slip ring 27 is located at the rear end of the hollow cylinder 10.

Further, the fixed side is fixed to the outer periphery of the image fiber main body 14. The outer periphery of the image fiber body 14 is covered with a stainless steel pipe (not shown), and the tip of the lens 15 is held by a bearing 29 so that the optical axes of the side view prism 12 and the lens 15 do not change. has been done.

FIG. 3 shows a side sectional view of the hollow cylinder holding housing 13 rotatably connected to the rear end of the hollow cylinder 10. An image fiber main body 14 is inserted. The direct view rotating shaft 30 is rotatably held by a bearing 31 provided at the rear end of the hollow cylindrical holding housing 13 so as not to contact the outer periphery of the image fiber main body 14 . Further, a rotor 32 of a rotary drive motor is fixed at an intermediate position of this direct view rotating shaft 30, and the outer circumference of this rotor 32 (
Second, the stator 33 of the rotary drive unit is attached to the hollow cylindrical holding housing 1.
It is provided on the inner peripheral part of 3 and is fixed by a second stopper fitting. Furthermore, a speed reducer 35 is fixed to the tip of the direct view rotating shaft 30, and the input shaft 36 of this speed reducer @35 and the direct view rotating shaft 30 are connected. On the other hand, the reducer 35
1: The hollow cylinder 10 is fixed to the output shaft 37, and is held by a bearing 38 provided at the tip of the hollow cylinder holding housing 13 of the hollow cylinder 10Fi. and,
Power is supplied to the rotor 32 by a brush 39 provided on the stator, and this brush 39 is connected to a power source through a tS built in the image fiber 14.

Next, the operation of this embodiment will be described. First, in order to vary the side view prism 12, that is, to rotate the side view rotation shaft 16, the electric wire 28 is connected to the power source in FIG. Then, the electric current flows through the slip ring 27.
Since the brush 25 connected to the end of the rotor 18 is energized, the rotor 18 rotates.

The side view rotation shaft 16 is rotated. This rotation of the side-view rotating shaft 16 transmits the rotational force to the input shaft 22 of the reducer 21, so that it is decelerated and output to the output shaft of the reducer 21. This output allows the side-viewing prism 12 attached to the tip of the output shaft n of the reducer 21 to freely rotate on the optical axis of the image fiber L4 at low speed and at a rotation angle of 360° or more.

Next, in order to vary the direct viewing prism 11, that is, to rotate the direct viewing rotation shaft 30, in FIG.
Connect the electric wire 40 to a power source (not shown). Then, there is a phone number from the power source! 40, the brush 39 is energized, and the rotor 3
2 is rotated, the direct view rotating shaft 30 is rotated. The rotation of the direct rotation shaft 30 transmits the rotational force to the input shaft 36 of the reducer 35, which decelerates it and outputs it to the output shaft q of the reducer 35. This output rotates the hollow cylinder 10, and at the same time the direct viewing prism 1 fixed to the tip of the hollow cylinder 10
1 rotates around the optical axis of the lens 15. The direct viewing prism 11 can be freely rotated at a low speed through a rotation angle of 3600 or more.

As described above, according to this embodiment, the side viewing prism 12
and by arbitrarily rotating the prism for direct viewing (2.
The image can be easily formed on the incident end face of the

In the above embodiments, prisms are used as the side-viewing device and the direct-viewing device, but it goes without saying that even if a reflecting mirror is used in place of the prism, the same effect can be obtained as in the case of the prism.

[Effects of the Invention] As explained above, according to the present invention, it is possible to easily change the field of view without bending the image fiber body, thereby preventing damage to the image fiber and improving the durability of the image fiber. can be improved. Furthermore, it has the excellent effect of being able to perform variable control of the side-viewing and direct-viewing devices smoothly and accurately.

[Brief explanation of the drawing]

FIG. 1 is a schematic side view of one embodiment of the present invention, and FIG. 2 is a schematic side view of one embodiment of the present invention.
Fig. 3 is a side sectional view of the hollow cylinder holding housing shown in Fig. 1, Fig. 4 is a schematic sectional view of a next inspection device using a conventional image fiber, and Fig. 5 is a side sectional view of the hollow cylinder holding housing shown in Fig. 1. 5 is a diagram for explaining an example of use of the inspection device of FIG. 4. FIG. IO... Hollow cylinder 11... Prism for direct viewing 12... Prism for side viewing 13... Hollow cylinder holding housing [4... Image fiber body 15... Lens 16... Side viewing rotation Shaft 18.32...Rotor 1
9.33...Stator 21.35...Reducer 2
2.36...Input shaft 37...Output shaft 30
... Direct View Rotating Axis Agent Patent Attorney Yoshiaki Inomata (and 1 other person) 1st
Figure 2 Figure 3

Claims (4)

[Claims] (1) a hollow cylinder, a hollow cylinder holding housing connected to the rear end of the hollow cylinder, and an image fiber main body disposed in the center of the hollow cylinder and the hollow cylinder holding housing;
a lens disposed at the tip of the image fiber body;
A direct viewing device disposed at the tip of the hollow cylinder, a side viewing device disposed in front of the lens, and the direct viewing device and the side viewing device centered around the optical axis of the lens. What is claimed is: 1. An image fiber equipped with a direct viewing device and a side viewing device, the image fiber comprising a rotary drive device that can rotate on concentric circles. (2) The rotation of the side viewing device is controlled by the first
An image fiber equipped with a direct viewing/side viewing device according to claim 1, wherein the image fiber is configured to be operated by a first rotary drive motor via a speed reducer. (3) Direct viewing according to claim 1, wherein the direct viewing device is rotated by a second rotary drive motor via a second speed reducer disposed within the hollow cylindrical holding housing. Image fiber equipped with a side viewing device. (4) An image fiber equipped with a direct viewing device and a side viewing device according to claim 1, wherein the direct viewing device and the side viewing device are each a prism or a reflecting mirror.