JP2000121956A - Borescope - Google Patents

Abstract

PROBLEM TO BE SOLVED: To eliminate misoperation and to improve operability by providing a joy stick for adjusting the angle of bend of the tip part of a tube. SOLUTION: The joy stick 5 provided near a sight hole 2 is constituted of an operation lever 5a fit and inserted in a hole 1b provided in the casing 1a of the borescope 1 and cross-shaped wire rope supporting material fixed at the lower end of the lever 5a, and the lever 5a is supported by a supporting point provided at the hole 1b part of the easing 1a. For example, the cover of a jet engine is detached, the tip part 3a of the tube of the borescope 1 is inserted from an inspection port to the vicinity of a turbine blade, and light is supplied from a light source device, then the joy stick 5 is properly tilted at 360 deg. in an optional direction while pressing an eye on the peephole 2. Thus, the turbine blade is inspected by moving the tip part 3a of the tube while bending it in the optional direction.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bore scope for inspecting the inside of an engine.

[0002]

2. Description of the Related Art A bore scope uses an optical fiber to inspect the inside of an engine for damage or the like.
It has a structure as shown in FIG.

FIG. 6 is a side view of a conventional bore scope.
It is a figure showing the state where damage in a turbine part and a combustion chamber is inspected. In the figure, a is a bore scope. b is a viewing window provided at one end of the bore scope a. c is a bendable tube provided with a lens (not shown) at the tip provided on the opposite side of the viewing window b. d is a light guide cable having one end connected to the bore scope a and the other end connected to the light source device. e is a focus adjustment ring. f is a vertical angle adjustment knob at the tip of the tube c. g is a knob for adjusting the right and left angles at the tip of the tube c. h is the vertical angle free knob, i
Is a left / right angle free knob. j is a diffuser case of the engine, and k is an opening provided in the diffuser case j. m is the engine combustion
Chamber, where n is a turbine vane.

When inspecting the damage of the turbine vane n, as shown in FIG. 6, the tip of a bore scope a is inserted through an opening k provided in a diffuser case j, and light is transmitted from a light source device. By turning the knob f for adjusting the vertical angle and the knob g for adjusting the left and right angles as needed, and turning the tip of the tube c up, down, left, and right, the turbine vane n is moved. inspect.

[0005]

However, in the bore scope, the knob for adjusting the tip angle of the tube has two stages, a knob for adjusting the vertical angle and a knob for adjusting the left and right angles. Bend the tube tip up and down and left and right while turning the knob for up and down angle adjustment and the knob for left and right angle adjustment appropriately. On the contrary, an operation error such as turning the knob for adjusting the vertical angle is made. In addition, the knob for adjusting the vertical and horizontal angles has a problem in that it is difficult to operate the two knobs in order to move the tip obliquely.

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above-described problems, and the tip of the tube is bent only by tilting one operating rod of the joystick, so that an operation error can be eliminated. It is an object of the present invention to provide a bore scope that can be bent in any direction of 360 ° to improve operability.

[0007]

According to the present invention, there is provided a borescope for inspecting the inside of an engine by inserting a bendable tube having an optical fiber, wherein a joystick for adjusting a bending angle of the tube tip is provided. A borescope with tech is provided.

According to a preferred embodiment of the present invention, the joystick includes a casing provided on the rear end side of the tube, an operating rod rotatably supported by the casing, and a distal end of the operating rod. It is provided with a plate-shaped or cross-shaped wire rope supporting member provided in a radial direction and a wire rope connecting the wire rope supporting member and a tube tip.

Next, the operation of the present invention will be described. For example, to inspect a jet engine turbine blade for damage, remove the jet engine cover,
Insert the tip of the borescope tube from the inspection port close to the turbine blade, send light from the light source device, place the eye on the viewing window, and tilt the joystick 360 degrees in any direction as appropriate. Inspect the turbine blades by bending the tip in any direction. Since the tube tip is bent in an arbitrary direction while tilting one operating rod of the joystick, an operation error when bending the tube tip can be eliminated and operability can be improved.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view of a bore scope according to the present invention. FIG. 2 is a schematic explanatory diagram of the joystick. 1 and 2, reference numeral 1 denotes a bore scope. 1a is a casing of the bore scope 1, and 1b is a hole provided in the casing 1a. Reference numeral 2 denotes a viewing window provided at one end of the casing 1a. Reference numeral 3 denotes a bendable tube arranged on the opposite side of the viewing window 2 of the casing 1a, and reference numeral 3a denotes a distal end of the tube 3. A large number of optical fibers (not shown) are housed in the tube 3, and a lens 3b is provided at the tip. A light guide cable 4 has one end connected to the casing 1a and the other end connected to a light source device (not shown). Reference numeral 5 denotes a joystick provided near the viewing window 2.

The joystick 5 is, as shown in FIG.
An operating rod 5a fitted into a hole 1b provided in a casing 1a of the bore scope 1 and a cross-shaped wire rope support member 7 fixed to a lower end of the operating rod 5a are provided. It is supported by a fulcrum 6 provided in the hole 1b of 1a. The wire rope support 7
May be plate-shaped instead of cross-shaped.

Reference numeral 8 denotes four wire ropes housed in the casing 1a of the bore scope 1, the upper end of which is fixed to the wire rope supporting member 7, and the lower end of which is fixed to the tube tip 3a. Of the four wire ropes 8, the upper ends of the two wire ropes 8a and 8b are fixed to the projections 7a and 7b of the cross-shaped wire rope supporting member 7, and the upper ends of the other two wire ropes 8c and 8d are The wire ropes 8a, 8d are fixed to the projections 7c, 7d so as to oppose each other.
b adjusts the vertical angle, and the wire ropes 8c and 8d adjust the horizontal angle.

Reference numeral 9 denotes a wire rope securing device for keeping the direction of the tube tip 3a constant during the inspection, and two holding plates 9a for holding the wire rope 8, and the two holding plates 9a. A hinge portion 9b that supports one end of the holding plate 9a and that can be opened and closed, and a spring 9c that inserts one end into a hole of one holding plate 9a and operates in a direction to open the holding plate 9a, is fitted over the other holding plate. It comprises a rod 9d fixed to 9a and a tightening mechanism 9e for tightening the holding plate 9a against a spring 9c provided at the other end of the rod 9d.

FIG. 3 is a perspective view of the jet engine, and FIG.
FIG. 4 is a view on arrow AA in FIG. 3. 3 and 4, reference numeral 11 denotes a jet engine. Reference numeral 11a is a cover for inserting a device. 11b is an inspection port. 11c
Is an opening plug.

FIG. 5 is a diagram showing the field of view of the turbine blade by the bore scope. In FIG. 5, reference numeral 10 denotes a turbine blade. 10a is a platform of the turbine blade 10, and 10b is a cooling hole provided in the turbine blade 10. 10c is a blade tip.

Next, the operation based on the embodiment will be described. For example, when inspecting the turbine blade 10 of the jet engine 11 for damage, the cover 11a of the jet engine 11 is removed, and the tube tip 3a of the bore scope 1 is inserted from the inspection port 11b to the vicinity of the turbine blade 10. Then, light is supplied from the light source device, the sight of the viewing window 2 is focused, and the joystick 1 is tilted 360 degrees in an arbitrary direction as needed. 1
Check for 0. Since the tube tip 3a is bent in an arbitrary direction while the one operating rod 5a of the joystick 1 is tilted, an operation error when bending the tube tip 3a can be eliminated and operability is improved. be able to.

It should be noted that the present invention is not limited to the above-described embodiment, but can be variously modified without departing from the gist of the present invention.

[0018]

According to the bore scope of the present invention described above, since the distal end of the tube is bent while tilting one operating rod of the joystick, it is possible to eliminate an operation error and to make any desired 360 °. Since it can be bent in the direction, the operability can be improved.

[Brief description of the drawings]

FIG. 1 is a perspective view of a bore scope of the present invention.

FIG. 2 is a schematic explanatory diagram of a joystick.

FIG. 3 is a perspective view of a jet engine.

FIG. 4 is a view as viewed in the direction of arrows AA in FIG. 3;

FIG. 5 shows a view of a turbine blade with a borescope.

FIG. 6 is a side view of a conventional borescope, showing a state in which damage in a turbine and a combustion chamber is inspected.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 borescope 1 a casing 1 b hole 2 viewing window 3 tube 3 a tube tip 3 b lens 4 light guide cable 5 joystick 5 a operating rod 6 fulcrum 7 wire rope support 8 wire rope 9 wire rope securing device 10 turbine blade 10a Platform 10b Cooling Hole 10c Blade Tip 11 Jet Engine 11a Equipment Insert Cover 11b Inspection Port 11c Opening Plug

Claims (2)

[Claims] 1. A bore scope for inspecting the inside of an engine by inserting a bendable tube having an optical fiber, comprising a joystick for adjusting a bending angle of a tip portion of the tube. Bore scope. 2. The joystick according to claim 1, wherein the joystick is provided at a rear end of the tube, an operating rod rotatably supported by the casing, and a distal end of the operating rod.
2. The bore according to claim 1, further comprising: a plate-shaped or cross-shaped wire rope supporting member having a diameter increased in a radial direction, and a wire rope connecting the wire rope supporting member and a tube tip.
scope.