JPS61112118A - Image fiber provided with side observation device - Google Patents

Abstract

PURPOSE:To change a visual field without bending an image fiber and to improve the durability of the fiber by rotating a side observation device fixed to the leading end of a hollow cylinder around the optical axis of the image fiber and varying an angle from the optical axis. CONSTITUTION:The hollow cylinder 10 fixing the side observation prism 11 to its leading end part is pivotally held by a holding case 12. Since a rotary shaft 15 is rotated in accordance with the rotation of a rotor 17 arranged on the hollow cylinder side and a screw 27 is rotated through a reduction gear 20 in accordance with its output shaft 22 and gears 23, 32, the prism 11 changes the angle by using a supporting point 24 as its supporting point. A rotary shaft 37 is rotated in accordance with the rotation of a rotor 39 arranged on the holding case 12 side and the prism 11 is rotated around the optical axis of the image fiber 13 in accordance with the rotation of the hollow cylinder 10 fixed on an output shaft 44. Consequently, the visual field can be changed without bending the image fiber 13 and the durability of the fiber 13 can be improved.

Description

TECHNICAL FIELD OF THE INVENTION The present invention relates to an image fiber, and in particular to an image fiber with a side viewing device.

[Technical background of the invention and its problems] Image fibers are used to inspect the inside of various pipes and monitor equipment in atomic couplants. Conventional image fibers are constructed by bundling multiple optical fibers. The lens attached to the tip of the image fiber body is moved by bending 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. A lens 4 fixed to the tip of the fiber body 3, a motor 5□5b installed inside the cover 2, and a motor 5 to the lens 4! + Wire 6a that transmits the driving force of 5b
, 6b are the main components. A pulley fixing stand 7a8+'7bs is fixed to one side end surface of the cover 2, sandwiching the image fiber body 3 therebetween.
In addition, pulley fixing bases 7a are provided on the upper and lower end surfaces of the cover 2, respectively.
l+ 7a2 and 7b1°7bz are fixed.

Pulley 8al+ 882+ sa8 and 8bt+ 8
b2+ 8ba ('i) This pulley fixing base 7a
1°7al+ 7a8 and 7bl, 7b2+ '7
It is attached to b8.

Further, motors 5a and 5b are respectively fixed to the other side end surface of the cover 2 with the image fiber main body 3 interposed therebetween. Both ends of the drive wire 6a provided on the upper side of the figure are connected to a lens 4 and a motor 5a fixed to the tip of the image fiber main body 3 via pulleys 8al+8a8+8ag.
It is attached between the wire take-up pulley 9a attached to the tip of the wire. Both ends of the drive wire 6b provided on the lower side of the box as shown in the figure are connected to the Boo! 78b1°8b2+ SBS is attached between the lens 4 fixed to the tip of the image fiber main body 3 and the wire take-up pulley 9b attached to the tip of the motor 5b. For example, when the wire 6a is wound around the wire take-up pulley 9a by driving the motor 5a, the image fiber main body 3
is bent upward by the tensile force of the wire 6a as shown in FIG. As mentioned above, if the image fiber body 3 is repeatedly used with the image fiber body 3 bent, there is a risk that the image fiber body 3 will be damaged and images will not be transmitted. There was a problem with this.

[Object of the Invention] The present invention has been made in view of the above-mentioned circumstances, and its purpose is to provide a side viewing device drive capable of changing the field of view by rotating the side viewing device without bending the image fiber main body. An object of the present invention is to provide an image fiber equipped with a device.

[Summary of the Invention] In order to achieve the above object, the present invention comprises a hollow cylinder, an image fiber body written in the center of the hollow cylinder, and a lens fixed to the tip of the image fiber body. , a side viewing device disposed at the tip of the hollow cylinder, and a side viewing device driving device that changes the side viewing device surface and varies the angle of the side viewing device surface with respect to the lens optical axis. This invention relates to a side-viewing device comprising: A side viewing prism or a side viewing reflector is used as the side viewing position.

[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 side-viewing prism (■) is installed at the tip of the hollow cylinder IO, and the rear end of the hollow cylinder IO is connected to the hollow cylinder holding housing 12 so as to be rotatable in the circumferential direction. has been done.

FIG. 2 shows a side sectional view of the hollow cylinder 10. As shown in the figure, an image fiber body 13 is inserted into the center of the hollow cylinder 10, and the tip of the image fiber body 13 is inserted into the center of the hollow cylinder 10. A lens 14 is fixed to.

The rotation shaft 15 for driving the variable angle of the side-viewing prism surface is inserted while being rotatably held by a bearing 16 with a one-foot gap so as not to contact the outer periphery of the image fiber main body 13 .

A rotor 17 is fixed to this rotary shaft 15 for driving the variable angle of the prism surface for side viewing, and a stator 18 is fixed to the outer periphery of the rotor 17, and a stopper 19 is fixed to the inner periphery of the hollow cylinder IO. Fixed by In addition, a reduction gear 20 is installed at the tip of the rotating shaft 15 for driving the side-viewing prism with a variable surface angle.
is fixed, and the rotating shaft 15 for driving the variable angle of the side viewing prism surface is connected to the input shaft 21 of the speed reducer 20. A year gear 23 is attached to the output shaft 22 of the reduction gear 20.

On the other hand, a base bearing plate 26 is fixed to the tip of the inner peripheral portion of the hollow cylinder IO, and a prism internal defining plate 25 is further fixed to this bearing plate 26. And the side viewing prism 11
is attached to the prism fixing plate 25 by a connecting fitting 24 so as to be able to change its angle. Further, the ball screw 27 is rotatably attached to the bearing plate 26 by a bearing.

A nut 29 is inserted into this ball screw 27,
A 14-connection rod 30 is attached to the nut 29. The connecting link 30 and the side-viewing prism 11 are connected to each other by a link 31 so that the angle can be changed.

A bevel gear 32 is identified at the tip of the ball screw 27, and this bevel gear 32 and the output l1Ilt12 of the reducer 20
The bevel gear 23 attached to the tip of the bevel gear 23 meshes with the bevel gear 23.

By the way, power is supplied to the first rotor 17 by a brush 33, which is not provided in the stator 18. One end of an electric wire 34 is connected to this brush 33, and the other end is connected to the image fiber body 13 via a slip ring 35.
It is connected to an electric wire 36 built into the.

The rotation side of the slip ring 35 is fixed to the rear end of the hollow cylinder 10, and the fixed side is fixed to the outer periphery of the image fiber main body 13. In addition, the image fiber main body 1
The outer periphery of 3 is covered with a stainless steel pipe (not shown). On the other hand, the distal end of the lens 14 is held by a bearing 16 so that the original axes of the viewing prism 11 and the lens 14 do not change.

On the other hand, the internal structure of the hollow cylinder holding housing 12 connected to the rear end of the hollow cylinder 10 is as shown in the side cross-sectional view of FIG. The image fiber main body 13 is inserted as in the figure. The side viewing prism rotates @37H, and is rotatably held by a bearing so as not to contact the outer periphery of the image fiber main body 13. Further, a rotor 39 is fixed to the side-viewing prism rotation shaft 37 , and a stator 40 is fixed to the outer periphery of the rotor 39 with a stopper 41 . The stopper 41 is fixed to the inner circumference of the hollow cylindrical holding housing 12. Further, a reduction gear 42 is attached to the tip of the side viewing prism rotation shaft 37, and the input shaft 43 of the reduction gear 42 is connected to the IMII viewing prism rotation shaft 37. On the output shaft 44 of this reducer 42.

A hollow cylinder 10 is fixed, and this hollow cylinder IO is held by a bearing 15 and has a C10 configuration.

Next, the effects of the five examples of Honjitsu 7Ji will be explained.

First, the electric wire: 36
ni゛(1), follow the source. Then, slip ring 3
5 through 'i)-m 34 ? The brush 33 connected to the IT end is energized, and the rotor 17 rotates. When the rotor 17 rotates, the side viewing prism surface angle variable drive rotating shaft 15, which is fixed integrally with the rotor 17, rotates, and rotational force is transmitted to the input shaft 21 of the reducer 20. The signal is decelerated and output to the output shaft 22 with deceleration h>20. With this output, 423. The ball screw 27 is rotated via the bevel gear 32, and the nut 29 moves in the left-right direction on the drawing, so the side-viewing prism 11 changes its angle using the connecting tool 24 as a fulcrum. It turns out. In other words, the surface of s (11 viewing prism 1) can be widened.

next @! In order to rotate the viewing prism itself, the angle of the viewing prism surface relative to the optical axis of the lens is
A power source is connected to a power source 47 built into the image fiber main body 13. Then, the brush 46 provided on the identifier 40 is energized, and the rotor 39 rotates. When the rotor 39 rotates, the side viewing prism rotation shaft 37 fixed integrally with the rotor 39 rotates, and the input shaft 4 of the reducer 42 rotates.
Since the rotational force is transmitted to 3, it is decelerated and output to the output shaft 44 of the reducer 42. This output rotates the hollow cylinder 10, so that the side-viewing prism 11 provided at the tip of the hollow cylinder lυ rotates about the optical axis of the lens 14.

The side-viewing prism 11 can be freely rotated through an angle of 360° or more at a low speed.

As mentioned above, the side-viewing prism A can freely rotate its prism surface and the prism surface itself, so that it can transmit the image of the object to be observed from the front of the image fiber to the surface III to the incident end surface of the lens 14. It can be imaged.

Note that although a side-viewing prism is used in this example,
A reflector can be used instead of this prism.

"Effects of the Invention" As explained above, according to the present invention, it is possible to electrify the field of view without bending the image fiber body, thereby making it possible to prevent damage to the image fiber and to increase the durability of the image fiber. can improve sex. In addition, the control of the visual equipment (event 1) is smoother and more centrally concealed compared to conventional devices, which is an excellent result.

[Brief explanation of drawings]

FIG. 1 is a schematic side view of one embodiment of the present invention, and FIG. 2 is a schematic side view of an 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 an 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. ]3... Image fiber body 14... Lens 15... Rotation shaft 17 for driving the variable angle of the prism surface for side viewing
．． 39...Rotor 18.40...Stator ゛2
U, 112...Reducer 21.43...Input shaft 22.44...Output shaft II 33.46...
Brush, 35... Slip ring 37... Side view prism rotation axis No. 1 Figure I? Figure 2 Figure 3 Figure 4

Claims (4)

[Claims] (1) A hollow cylinder, an image fiber body disposed in the center of the hollow cylinder, a lens fixed to the tip of the image fiber body, and a side-viewing lens disposed at the tip of the hollow cylinder. A side viewing device comprising: a side viewing device; and a side viewing device driving device that changes the side viewing device surface and changes the angle of the side viewing device surface with respect to the lens optical axis. Image fiber with (2) The side viewing device according to claim 1, wherein the side viewing device surface is varied by a motor for rotating the side viewing device via a speed reducer for rotating the side viewing device. image fiber with equipment for (3) A patent claim in which the angle of the side viewing device surface with respect to the lens optical axis is varied by a side viewing device angle variable drive motor via a side viewing device angle variable reducer. An image fiber comprising the side viewing device according to item 2. (4) An image fiber equipped with a side viewing device according to claim 1, wherein the side viewing device is a side viewing prism or a side viewing reflector.