JPH0532819Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to an image guide scope for an engine for observing the combustion situation in the combustion chamber of an engine, and particularly relates to an objective section for observing the combustion chamber.

(Prior Art and its Problems) Various image guide scopes have been proposed in the past.

However, in order to observe the combustion situation in the combustion chamber of an engine, it is necessary to form a hole in the cylinder and insert and fix the objective part of the image guide scope into this hole. However, until now, there has been no image guide scope equipped with an objective section that can be easily and quickly inserted and fixed into holes of various depths.

(Means for solving the problem) In order to solve the above problem, the objective part for observing the combustion chamber of the engine image guide scope of the present invention has an objective lens fixed to one end and the other end fixed to the combustion chamber. A protective tube that is fixed to the main body of the observation objective and covers the tip of the image guide, a stopper that fits movably in the axial direction on the outer periphery of the protective tube and can be fixed at any position in the axial direction, and the protective tube a hollow bolt fitted on the outer periphery of the engine so as to be movable in the axial direction and positioned between the objective body for observing the combustion chamber and the stopper; One end of the protection tube comes into contact with the protruding protrusion through a gasket, and the thread of the hollow bolt is screwed into the screw formed inside the protection tube insertion hole, and the hollow bolt is inserted into the protection tube. By screwing into the insertion hole, the hollow bolt pushes the stopper and one end of the protective cylinder is pressed against the protrusion via the packing.

(Example) Hereinafter, an example of the present invention will be described based on FIGS. 1 to 8.

FIG. 6 is an overall configuration diagram of an image guide scope for an engine equipped with an objective section for observing a combustion chamber according to an embodiment of the present invention. The eyepiece part 1 and the objective part 2 for observing measuring instruments are connected by a flexible tube 4, and the eyepiece part 1 and the objective part 3 for observing a combustion chamber are connected by a flexible tube 5. has been done. An image guide, which will be described later, is inserted into the flexible tubes 4 and 5.

The eyepiece section 1 includes an eyepiece grip 7, an eyepiece diopter adjustment dial 8, an image rotation adjustment dial 9, and a threaded section 10. 1 can be fixed.

A clamping surface 13 is formed on the measuring instrument observing objective section body 12 of the measuring instrument observing objective section 2, and the measuring instrument observing objective section 2 is fixed by clamping this clamping surface 13 with, for example, a tripod. It is made possible.

The combustion chamber observation objective section 3 includes a combustion chamber observation objective section main body 15 made of, for example, stainless steel, and a protective tube 16 made of, for example, Kovar or the like.
, lock nuts 17 and 18 made of stainless steel or the like as stoppers, and a hollow bolt 19 made of stainless steel or the like, as shown in detail in FIGS. A transparent part 21 made of, for example, sapphire is fitted and fixed to one end of the transparent part 16 by silver soldering or the like.
On the other end side, objective lenses 25 and 26 supported by a lens holder 22 made of Kovar or the like and lens holders 23 and 24 made of stainless steel or the like are arranged. The end surface of an image guide 28, which is a collection of many optical fibers, is opposed to the other end surface of the protective tube 16 of the objective lens 26 with a slight gap, and the outer peripheral surface of the image guide 28 is One end of the protection tube 16 is covered with an image guide holder 29 made of, for example, Kovar.

The other end of the protection tube 16 is inserted into one end of the objective main body 15 for observing the combustion chamber, and the outer peripheral surface of the image guide 28 is inserted into the one end of the protection tube 16 inside the protection tube 16. , and is covered with a metal spacer 31 made of, for example, metal, and this metal spacer 31 is covered with a tube 32 made of, for example, stainless steel. A bolt 34 and a bolt 3 are installed at one end of the objective body 15 for observing the combustion chamber in a direction perpendicular to the axis.
5 are screwed together, the protection tube 16 is fixed by a bolt 34, and the image guide 28 is fixed by a bolt 35.

A threaded portion 37 is formed on the outer peripheral surface of the protective cylinder 16 except for both ends, and the lock nut 17 and the lock nut 18 are screwed into the threaded portion 37, and the lock nut 17 has a through hole along the diameter direction. 39 and the lock nut 18 are each formed with a through hole 40 along the diameter direction. The hollow bolt 19 is fitted into the threaded portion 37 of the protective tube 16 between the combustion chamber observation objective main body 15 and the lock nut 18 so as to be movable in the axial direction.
This hollow bolt 19 has a hexagonal head and has a thread 42 formed on its outer peripheral surface.

The protection tube 16 is inserted into the protection tube insertion hole 45 of the cylinder 44, as shown in FIG. It protrudes over the entire length in the direction, and one end of the protection tube 16 comes into contact with the protrusion 46 via a gasket 47. Further, a screw 48 is formed at the end of the inlet side of the protection tube insertion hole 45, and this screw 48 and the screw 42 of the hollow bolt 19 are screwed together.

FIG. 8 is an explanatory diagram of the state of use, in which the threaded part 10 of the eyepiece part 1 is screwed onto, for example, a high-speed camera 50, and the protective tube 1 of the objective part 3 for observing the combustion chamber is screwed together.
6 into the protective tube insertion hole 45 as shown in FIG. By fixing the tip of the measuring instrument observation objective section 2 to face the crank gauge 52, an image 54 of the combustion state in the combustion chamber 51 and an image 55 of the crank gauge 52 can be captured on the film 53.

Next, the action will be explained. In FIG. 7, when inserting the protective tube 16 of the combustion chamber observation objective section 3 into the protective tube insertion hole 45 of the cylinder 44, first the lock nuts 17 and 18 are brought into contact with each other, and then the protective tube insertion hole 45 is inserted. The protection tube 16 is inserted into the protection tube insertion hole 45 and one end is brought into contact with the protrusion 46 via the packing 47. Then, the screw 42 is screwed into the screw 48, and the hollow bolt 19 is screwed into the protective tube insertion hole 45. Then hollow bolt 1
9 comes into contact with the lock nut 18, the protection tube 16 is pushed to the back side of the protection tube insertion hole 45 through the lock nut 18 and the lock nut 17, and one end of the protection tube 16 is firmly attached to the protrusion 46 through the packing 47. is pressed against the combustion chamber 5 by the packing 47.
1 seal is made. That is, the lock nuts 17 and 18 are connected to the hollow bolt 19.
serves as a stopper for pushing in the protection tube 16, and the tip of the hollow bolt 19 can come into contact with the lock nut 18 with one end of the protection tube 16 in contact with the protrusion 46 via the gasket 47. If the protection tube insertion hole 45 is shallow, it is positioned close to one end of the protection tube 16, and if the protection tube insertion hole 45 is deep, it is positioned close to the other end of the protection tube 16.

In this way, by simply adjusting the positions of the lock nuts 17 and 18, the protective tube 16 can be inserted and fixed into the protective tube insertion hole 45 of any depth, and the objective section 3 for observing the combustion chamber can be inserted into the cylinder 44 of various engines. can be fixed extremely easily and quickly. Further, the lock nuts 17, 18 and the hollow bolt 19 are coated with a graphite differential coating to prevent problems such as galling of the threaded portions.

Furthermore, since it is equipped with an objective section 2 for observing measuring instruments and an objective section 3 for observing the combustion chamber, an image 54 of the combustion state in the combustion chamber 51 and an image 55 of the crank gauge 52 can be projected onto the film 53. As a result, data in each combustion situation can be collected extremely easily and accurately. That is, conventionally, the combustion chamber 51 and the crank gauge 52 are each provided with separate high-speed cameras 5.
0, it would be very difficult to synchronize them and the simultaneity of the video 54 and the video 55 would be inaccurate, but in this embodiment, the video 54 and the video 55 are recorded in one camera. Since the high-speed camera 50 can take pictures at the same time, there is no room for such a problem to occur. Note that instead of the crank gauge 52, a pressure gauge, a thermometer, etc. is used in the measuring instrument observation objective section 2.
The image may be photographed by

(Another Example) In the above example, lock nuts 17 and 18 were used as stoppers, but instead of these,
For example, a ring that loosely fits into the protection tube 16 may be fixed with screws or the like.

Further, in the above embodiment, an example was explained in which images from the measuring instrument observation objective section 2 and the combustion chamber observation objective section 3 are photographed by the high-speed camera 50, but instead of the high-speed camera 50, for example, a video camera etc. Other cameras may be used, and furthermore, visual observation may be performed.

(Effects of the invention) As explained above, according to the invention, the protective tube covers the tip of the image guide, with the objective lens fixed to one end and the other end fixed to the main body of the objective for observing the combustion chamber. a stopper that fits movably in the axial direction on the outer periphery of the protective tube and can be fixed at any position in the axial direction; and an objective for observing the combustion chamber that fits the outer periphery of the protective tube so that it can move in the axial direction. A hollow bolt is provided between the part body and the stopper, and one end of the protective tube comes into contact with a projection protruding inside a protective tube insertion hole formed in the cylinder of the engine via a gasket. , the thread of the hollow bolt is screwed into the screw formed inside the protection tube insertion hole, and by screwing this hollow bolt into the protection tube insertion hole, the hollow bolt pushes the stopper and removes the protection tube. Since one end of the tube is pressed against the protrusion through the gasket, the protective tube can be inserted and fixed into the protective tube insertion hole of any depth by simply adjusting the position of the stopper, and can therefore be used with various engines. It can be attached to the cylinder very easily and quickly.

[Brief explanation of drawings]

Fig. 1 is a sectional view of the objective part for observing a combustion chamber of an image guide scope for an engine according to an embodiment of the present invention, Fig. 2 is a sectional view taken along the - line in Fig. 1, and Fig. 3 is a sectional view in Fig. 1. 4 is an enlarged sectional view of the area surrounded by the dashed-dotted line in fig. 1, Figure 5 is an enlarged sectional view of the area surrounded by the dashed-dotted line in fig. An overall configuration diagram of an image guide scope for an engine equipped with an objective section for observing a combustion chamber in an embodiment of the invention,
FIG. 7 is a sectional view of the protection tube inserted and fixed into the protection tube insertion hole, and FIG. 8 is an explanatory diagram of the engine image guide scope in use. 3...Objective part for observing the combustion chamber, 15...Objective part body for observing the combustion chamber, 16...Protection tube, 17,1
8... Lock nut, 19... Hollow bolt, 2
5, 26...Objective lens, 28...Image guide, 42...Screw, 44...Cylinder, 45...
Protective tube insertion hole, 46... protrusion, 47... gasket, 48... screw.

Claims (1)

[Scope of utility model registration request] The objective lens is fixed to one end, and the other end is fixed to the main body of the objective for observing the combustion chamber, and the protective tube covers the tip of the image guide. comprising a stopper that can be fixed at any position in the axial direction, and a hollow bolt that fits on the outer periphery of the protective cylinder so as to be movable in the axial direction and is located between the main body of the objective section for observing the combustion chamber and the stopper, One end of the protection tube comes into contact with a protrusion protruding inside the protection tube insertion hole formed in the cylinder of the engine via a gasket, and the screw formed inside the protection tube insertion hole contacts the hollow The screws of the bolts are screwed together, and by screwing this hollow bolt into the protective tube insertion hole, the hollow bolt pushes the stopper and one end of the protective tube is pressed against the protrusion via the packing. An objective section for observing the inside of a combustion chamber of an image guide scope for an engine, which is characterized by: