JP5127564B2 - Method for measuring internal dimensions of subject - Google Patents

Description

  The present invention relates to a method for measuring an internal dimension of a subject for measuring a portion to be measured inside the subject.

Conventionally, in order to observe the inside of a subject, an endoscope having an elongated insertion portion provided with an observation means such as a CCD at the tip is used. For example, in a structure having a heat source, a cooling passage for circulating a cooling fluid is provided. If the cooling passage is deformed by the influence of heat from the heat source or is narrowed by the influence of impurities mixed in the cooling fluid and the cooling fluid cannot be properly distributed, the entire structure is heated by heat. There is a risk of damage. For this reason, in such a structure, it is necessary to periodically inspect the state of the internal cooling passage, and in such a case, an endoscope is used. That is, the lid member that normally covers the opening that communicates the cooling passage with the outside is removed, and the insertion portion of the endoscope is inserted through the opening. By disposing the distal end of the insertion portion in the vicinity of a desired measurement target, it is possible to suitably observe the state of the cooling passage inside the structure that is the subject by observation means provided at the distal end of the insertion portion. . In such an inspection, quantitative measurement may be performed as necessary, such as whether the cooling passage has a predetermined width. In such a case, a stereo measurement optical adapter is attached to the distal end of the insertion portion, and the measurement means is configured by the stereo measurement optical adapter and the observation means provided in the insertion portion, so that a desired measurement can be performed. It is possible to measure the size of an object by image processing (see, for example, Patent Document 1). For example, in order to measure the width of the cooling passage as described above, reference points are set on both wall surfaces constituting the cooling passage on the image, and the coordinates of each reference point are obtained by stereo measurement. The width of the cooling passage determined can be measured.
JP 2006-20276 A

  However, in the method of Patent Document 1, since the measurement is performed by stereo measurement, there is a limit to the size that can be accurately measured. For this reason, when measuring a part that cannot be directly measured by a measurer, such as a measurement target inside a subject, if the measurement target has a certain dimension or more, measure accurately. There was a problem that made it impossible.

  The present invention has been made in view of the above-described circumstances, and provides a method for measuring the internal dimensions of a subject that can accurately measure the dimensions of the measurement target even if the measurement target inside the subject is large. Is.

In order to solve the above problems, the present invention proposes the following means.
The present invention relates to a method for measuring an internal dimension of a subject for measuring a dimension of a portion to be measured inside the subject, wherein a gauge whose length from one end portion to the other end portion is previously measured is provided inside the subject. An insertion step of inserting the measurement object, and contacting the one end portion of the gauge to one end portion of the measurement object, and adjusting the direction of the gauge so as to follow the measurement direction of the measurement object A gauge position adjusting step, and a distance measuring step of measuring a distance from the other end portion of the gauge to the other end portion of the measurement object by performing stereo measurement with an endoscope inserted into the subject. It is characterized by providing.

  According to the method for measuring the internal dimensions of the subject according to the present invention, as an insertion step, a gauge whose length from one end to the other end is measured in advance is inserted to the measurement target inside the subject. And as a gauge position adjustment process, while adjusting the one end part of a gauge to the one end part of a measuring object, it adjusts so that the direction of a gauge may follow the measuring direction of a measuring object. Then, as a distance measurement step, if the distance from the other end of the gauge to the other end of the object to be measured is measured by stereo measurement using an endoscope inserted into the subject, the gauge measured by the endoscope can be used. The distance from one end of the measuring object to the other end of the measuring object and the length from one end of the gauge, which is one end of the measuring object that has been measured in advance, to the other end Dimensions up to can be measured. Here, according to the length from one end of the gauge to the other end, the distance that needs to be measured by stereo measurement with an endoscope can be minimized, and measurement accuracy can be ensured. .

  Further, in the above-described method for measuring the internal dimensions of the subject, in the insertion step, the distance from the reference point to the opposite side of the one end side along the gauge, with the other end portion of the gauge as a reference point. It is more preferable to insert the gauge together with the gauge in a state where the endoscope is attached to the gauge.

  According to the internal dimension measuring method of the subject according to the present invention, in the insertion step, the endoscope can be attached to the gauge and inserted together with the gauge. Here, the endoscope is attached to the gauge so that the distance can be measured from the reference point toward the opposite side to the one end side along the gauge with the other end of the gauge as the reference point. For this reason, in the distance measurement step, by measuring the distance from the reference point to the other end of the measurement object by stereo measurement with an endoscope, the distance from the other end of the gauge to the other end of the measurement object is determined. It is possible to measure and thereby measure the dimensions of the object to be measured. And the point referred when measuring a distance with an endoscope in a distance measurement process is only one place of the other end part of a measuring object. For this reason, the error which arises with the setting of a reference point in a measuring object can be minimized.

  Further, in the above-described method for measuring the internal dimensions of the subject, it is more preferable that the one end portion of the gauge is brought into contact with the one end portion of the measurement target at least at three or more points in the gauge position adjusting step. Has been.

  According to the method for measuring the internal dimensions of the subject according to the present invention, in the gauge position adjusting step, the one end of the gauge is brought into contact with the one end of the measurement object at at least three points. It is possible to prevent the measurement from being performed in an inappropriate orientation.

  Further, in the above-described method for measuring the internal dimensions of the subject, if the length measured by stereo measurement with the endoscope in the distance measurement step is larger than a preset allowable value, the one end of the gauge is measured. It is said that it is more preferable to perform the distance measurement step again by increasing the dimension from the portion to the other end portion.

  According to the internal dimension measuring method of the subject according to the present invention, in the distance measuring step, when the length measured by the stereo measurement with the endoscope is larger than a preset allowable value, from one end of the gauge By making the dimension to the other end longer and performing the distance measurement process again, the distance measured by the stereo measurement of the endoscope can be set to a range that can be measured with high accuracy.

  Further, in the above internal dimension measurement method of the subject, the gauge is in a closed state in which the first gauge portion having the one end and the second gauge portion having the other end overlap each other. The one end portion and the other end portion can be opened and closed until they are separated from each other, and in the inserting step, the first gauge portion and the second gauge portion are placed in the closed state and the subject In the gauge position adjusting step, the first gauge part and the second gauge part are opened and the one end part of the gauge is brought into contact with the one end part of the measurement object. Is more preferable.

  According to the internal dimension measuring method of the subject according to the present invention, the gauge can be easily inserted even in a narrow insertion path by closing the first gauge part and the second gauge in the insertion process. Can be made. On the other hand, in the gauge position adjustment process, the length from one end to the other end is ensured by opening the first gauge portion and the second gauge portion so that the one end portion and the other end portion are separated from each other. In the distance measuring step, the distance that needs to be measured by stereo measurement with an endoscope can be minimized. In addition, by performing the insertion process to the distance measurement process as described above, the dimension of the measurement object can be suitably measured even when the dimension of the measurement object is larger than the width of the insertion path on the way. it can.

  According to the internal dimension measuring method of the subject of the present invention, the dimension of the measuring object can be measured with high accuracy even if the measuring object inside the subject is large by performing the insertion process to the distance measuring process.

(First embodiment)
A first embodiment according to the present invention will be described with reference to FIGS. FIG. 1 shows an overall configuration of an endoscope system used for measuring the dimension of a measurement object inside a subject by the internal measurement method of the present embodiment. FIG. 2 shows details of the tip side. As shown in FIGS. 1 and 2, the endoscope system 1 includes a first endoscope 2A and a second endoscope each having endoscope insertion portions 3A and 3B inserted into the subject S. Two endoscopes 2B, a guide tube 10 having a guide tube insertion portion 11 that is similarly inserted into the subject S, and one end 30a to the other end 30b inside the subject S An internal measurement gauge 30 is provided as a gauge for measuring the dimension of the measurement target with reference to the length C1.

  As shown in FIGS. 1 and 2, the first endoscope 2A includes the endoscope insertion portion 3A, an endoscope operation portion 4A provided at the proximal end of the endoscope insertion portion 3A, The endoscope operation unit 4A and an endoscope main body unit 5A connected to the endoscope operation unit 4A. The endoscope insertion portion 3A is provided at the distal end of the flexible tube portion 3a and the flexible tube portion 3a having flexibility that can be bent according to the internal shape of the subject S, and is provided by the endoscope operation portion 4A. It has a bending portion 3b that can be bent by operation, and a hard tip portion 3c provided at the tip of the bending portion 3b. The endoscope operation section 4A is provided with a joystick 4a, and the bending section 3b of the endoscope insertion section 3A can be freely bent in four directions by operating the joystick 4a. The distal end portion 3c includes a distal end portion main body 3d fixed to the bending portion 3b, and a stereo measurement side-view adapter 3e provided detachably on the distal end portion main body 3d. The tip body 3d incorporates a CCD (not shown) which is an observation means for observing the subject S. Further, although not shown, the stereo measurement side-view adapter 3e includes a reflection mirror and a pair of objective lenses. Then, the direction of observation by the CCD built in the tip body 3d is changed from the so-called direct viewing direction M, which is the direction of the central axis L2, to the so-called side viewing direction N, which is substantially orthogonal to the central axis L2. In addition to switching, it is possible to form an image on the CCD by observing the outside from the observation surface 3h with each of the pair of objective lenses in the switched side viewing direction N. Then, it is possible to measure the position and length of the observed object by the misalignment of the images of the pair of objective lenses, that is, the measurement is performed by the tip body 3d and the stereo measurement side-view adapter 3e. Means 6 are configured. Here, the position measurement by the measuring means 6 is performed by X and Y coordinates represented by two axes on a plane orthogonal to the optical axis along the side viewing direction N, and Z coordinates represented by the optical axis along the side viewing direction. In the first endoscope 2A of the present embodiment, the intersection of the optical axis and the observation surface 3h of the tip 3c is set as a reference point O6 that is the origin of each coordinate. The endoscope body 5A has a display 5a, and can display an image acquired by the CCD and a measurement result by the measuring means 6.

  The second endoscope 2B basically has the same configuration as the first endoscope 2A, the endoscope insertion section 3B, the endoscope operation section 4B having a joystick 4a, and a display. It is comprised with the endoscope main-body part 5B which has 5a. The endoscope insertion portion 3B has a flexible tube portion 3a, a bending portion 3b, and a hard tip portion 3f provided at the tip of the bending portion 3b. The tip portion 3f is a first endoscope. A tip portion main body 3d similar to the mirror 2A and an optical adapter 3g that is detachably provided on the tip portion main body 3d and enables observation in the direct viewing direction by a CCD built in the tip portion main body 3d while performing illumination. Has been.

  As shown in FIGS. 1 and 2, the guide tube 10 includes the guide tube insertion portion 11, the guide tube operation portion 12 provided at the proximal end of the guide tube insertion portion 11, and the first endoscope 2A. And a guide tube 13 through which the endoscope insertion portion 3A is inserted. The guide tube insertion portion 11 is connected to the guide tube operation portion 12 and is provided at the distal end of the flexible tube portion 11a and a flexible tube portion 11a having flexibility that can be bent according to the internal shape of the subject S. And a bending portion 11b that can be bent by an operation by the guide tube operation portion 12. The guide tube operation section 12 is provided with a bending knob 12a, and the bending section 11b of the guide tube insertion section 11 can be freely bent in four directions depending on the rotation direction of the bending knob 12a. The guide tubes 13 are respectively fixed to a plurality of support rings 14 fixed to the guide tube insertion portion 11, and the endoscope insertion portion 3A of the first endoscope 2A inserted from the proximal end side is inserted into the guide tube. This is for disposing up to the tip side along the portion 11. The guide tube operation section 12 and the guide tube insertion section 11 are formed with a channel 10a that communicates from the proximal end side to the distal end side. The proximal end side of the channel 10 a is open to the guide tube operating portion 12, and the distal end side is open to the distal end of the guide tube insertion portion 11. An insertion portion 33 (described later) of the internal measurement gauge 30 is inserted into the channel 10a from the proximal end side, and protrudes from the distal end side.

  Further, the guide tube 10 includes a fixing means 15 for fixing the guide tube insertion portion 11 to the subject S. As shown in FIG. 3, the fixing means 15 extends in the axial direction on the outer peripheral surface of the guide tube insertion portion 11, and a plurality of leaf springs 16 disposed in the circumferential direction and the base of the guide tube insertion portion 11. A switching operation portion 17 that is provided on the end side and performs a bending operation of the leaf spring 16 and a pulling wire 18 that transmits the operation by the switching operation portion 17 to the leaf spring 16 are provided. In the present embodiment, four leaf springs 16 are provided in the circumferential direction on the distal end portion of the flexible tube portion 11a, that is, on the proximal end side of the bending portion 11b. The plurality of leaf springs 16 are fixed to the outer peripheral surface of the guide tube insertion portion 11 while their tips are connected to each other by a fixing ring 19 that is externally fitted to the guide tube insertion portion 11, and their base ends are fixed to the guide tube insertion portion 11. Are connected to each other by a sliding ring 20 which is mounted so as to be movable back and forth in the axial direction.

  The switching operation portion 17 is a substantially annular member that is externally attached to the guide tube insertion portion 11 so as to be able to advance and retreat in the axial direction, and has two through holes 17a and 17b through which the pulling wire 18 is inserted. . Further, the switching operation portion 17 is formed with a screw hole communicating from the outer peripheral surface to the inner peripheral surface, and a fixing screw 17c is screwed. Then, the fixing screw 17c is tightened in a state where the tip of the fixing screw 17c is in contact with the outer peripheral surface of the guide tube insertion portion 11 on the inner peripheral surface of the switching operation portion 17, so that the guide tube insertion portion 11 is fixed. Thus, the switching operation unit 17 can be fixed in the axial direction.

  Further, the pulling wire 18 is configured in an annular shape having no end portion, and is used for bending the leaf spring 16 on the tip side with respect to the movable range of the sliding ring 20 that slides while bending the leaf spring 16. It is folded back on the base end side with respect to the movable range of the switching operation unit 17. Here, the support ring 14 that fixes the guide tube 13 is configured such that the first support ring 14A, the second support ring 14B, and the slide ring 20 provided in both ranges where the pulling wire 18 is folded back are slid. The third support ring 14C and the fourth support ring 14D provided on both ends of the above movable range, and the fifth support ring provided on the base end side from the above range in which the switching operation portion 17 can slide. The support ring 14E and at least five of the support ring 14E are provided, and also serves as a guide for the pulling wire 18. In FIG. 3, only the first support ring 14 </ b> A only guides the pulling wire 18.

  Each support ring 14 is formed with two through-holes 14a and 14b, and each of the folded pulling wires 18 is inserted therethrough. Here, in the pulling wire 18, a small-diameter coil sheath 21 is disposed on one side from the folding position on the distal end side to the folding position on the proximal end side, and the pulling wire 18 is disposed inside each coil sheath 21. It is arranged. Further, on the other side of the pulling wire 18 from the distal end side folding position to the proximal end side folding position, the distal end side folding position to the first support ring 14A, and the first support ring 14A to the third support ring 14A. Similar coil sheaths 21 are arranged up to the support ring 14C, from the fourth support ring 14D to the fifth support ring 14E, and from the second support ring 14B to the folded-back position on the base end side. The wire 18 is disposed inside each coil sheath 21. That is, the pulling wire 18 is between the third support ring 14C and the fourth support ring 14D where the sliding ring 20 advances and retreats only on the other side from the folded position on the distal end side to the folded position on the proximal end side. The switching operation portion 17 is disposed inside each coil sheath 21 except that the switching operation portion 17 is exposed between the fifth support ring 14E and the second support ring 14B. The exposed portion of the pulling wire 18 is welded and fixed to the outer peripheral surface of the sliding ring 20 at a position corresponding to the sliding ring 20. Further, in the exposed portion of the pulling wire 18, a portion inserted through the switching operation portion 17 is welded and fixed on each of the distal end surface 17 d and the proximal end surface 17 e of the switching operation portion 17. The coil sheath 21 in which the pulling wire 18 is disposed communicates with the through holes 14 a and 14 b of the corresponding support rings 14, and the end portions are fixed to the support rings 14. Further, the coil sheath 21 at a position corresponding to the switching operation unit 17 is inserted into the through hole 17b of the switching operation unit 17, and the switching operation unit 17 can advance and retreat independently of the coil sheath 21. Yes.

  With the configuration as described above, when the switching operation unit 17 is advanced to the distal end side in the axial direction in the fixing means 15, the side fixed to the base end surface 17 e of the annular pulling wire 18 is pulled by the switching operation unit 17. It will be. The pulling wire 18 is folded back on the base end side from the position fixed to the base end surface 17e, arranged toward the front end side, and further folded back on the front end side and fixed to the sliding ring 20, so that sliding As a result, the ring 20 is pulled toward the distal end side, whereby the space between the sliding ring 20 and the fixed ring 19 is narrowed, and the leaf spring 16 is elastically curved and protrudes to the side. For this reason, the protruding tube spring 16 presses the wall surface in the vicinity of the subject S, whereby the guide tube insertion portion 11 can be fixed to the subject S. At this time, the operating force transmitted from the operator to the switching operation unit 17 is transmitted to the sliding ring 20 via the pulling wire 18 and acts as a pressing force to the side of the leaf spring 16. This operating force can be reliably reflected as a force to be fixed to the subject S by the leaf spring 16.

  Further, when the switching operation portion 17 is retracted to the axial base end side in a state where the leaf spring 16 projects to the side, the side fixed to the distal end surface 17 d of the annular pulling wire 18 is moved by the switching operation portion 17. It will be towed. Since the pulling wire 18 is disposed on the distal end side from the position fixed to the distal end surface 17d and is fixed to the sliding ring 20, the sliding ring 20 is pulled to the proximal end side, thereby sliding. The space between the ring 20 and the fixing ring 19 expands, so that the leaf spring 16 is restored and the amount projecting sideways is reduced. For this reason, it becomes possible to release the fixation with the subject S by the leaf spring 16 and freely move the guide tube insertion portion 11 again. At this time, similarly to the above, the operating force transmitted from the operator to the switching operation portion 17 is transmitted to the sliding ring 20 via the pulling wire 18 and acts as a force for extending the leaf spring 16. The user's operating force can be reliably reflected as a force for releasing the fixation of the subject S by the leaf spring 16.

  Next, the internal measurement gauge 30 which is a gauge will be described. As shown in FIGS. 1, 2, and 4, the internal measurement gauge 30 includes a main body block 31 attached to the distal end portion 3 c in the first endoscope 2 </ b> A and a contact block provided on the main body block 31. 32, an elongated insertion portion 33 whose distal end portion 33a is fixed to the main body block 31 and inserted into the subject S, and a grip portion 34 provided on the proximal end side of the insertion portion 33. The abutment block 32 has a first projecting member 51 projecting from the main body 50 as will be described later, and determines the reference length by the tip of the first projecting member 51. This constitutes one end 30a. Further, the main body block 31 has a second projecting member 43 projecting from a support surface 40a, which will be described later, to the opposite side to the direction in which the first projecting member 51 of the contact block 32 projects. The other end 30b which is the other of which the reference length is determined is configured by the tip of the protruding member 43. Hereinafter, details of each component of the internal measurement gauge 30 will be described in order.

  The insertion portion 33 has a flexible distal end portion 33a that is fixed to the main body block 31 and a flexibility that extends from the distal end portion 33a to the proximal end side and can be bent in accordance with the internal shape of the subject S. And a flexible portion 33b. A gripping portion 34 is connected to the proximal end of the flexible portion 33b, and can be moved forward and backward in the axial direction by the operation of the gripping portion 34, or rotated around the axis.

  As shown in FIGS. 4 to 8, the main body block 31 is provided with a support surface 40a in which the distal end portion 3c of the endoscope insertion portion 3A is disposed and supported in the first endoscope 2A. One block 40 and a second block 41 that protrudes from the surface opposite to the support surface 40a and to which the contact block 32 and the insertion portion 33 are fixed. Then, on the support surface 40a of the first block 40, a fixing portion 42 for fixing the proximal end side of the distal end portion 3c of the endoscope insertion portion 3A to be fixed, and a substantially plate-like second protruding member 43, Is provided. As described above, the distal end of the second projecting member 43 constitutes the other end 30b, which is the other that determines the length, and the distal end 3c of the endoscope insertion portion 3A disposed on the support surface 40a. The tip 3i of the contact is brought into contact with the center axis L2 for positioning. Furthermore, a locking piece 45 protrudes from the second protruding member 43 so as to face the support surface 40a. The locking piece 45 is in contact with the observation surface 3h of the distal end portion 3c of the endoscope insertion portion 3A disposed on the support surface 40a, so that the distal end portion 3c is separated from the support surface 40a. And the rotation around the central axis L2 is restricted.

  Further, as shown in FIGS. 5 and 6, the fixing portion 42 is provided so as to protrude from the support surface 40a, and a substantially semicircular second shape into which the proximal end side of the distal end portion 3c disposed on the support surface 40a is fitted. A fastening member having a support member 46 having one recess 46a and a substantially semicircular second recess 47a provided opposite to the support member 46 and into which the proximal end side of the distal end portion 3c of the endoscope insertion portion 3A is fitted. The distal end portion 3c of the endoscope insertion portion 3A is inserted through a substantially circular through-hole 42a formed of a first recess 46a and a second recess 47a. Further, in the main body block 31, a screw hole 40b penetrating from the main body block 31 to the support member 46 is formed from the surface opposite to the support surface 40a. A screw 40c for tightening is screwed into the screw hole 40b from the side opposite to the support surface 40a, and the tip thereof is screwed into a screw hole 47b formed in the tightening member 47. Therefore, by tightening the tightening screw 40c, the distal end portion 3c of the endoscope insertion portion 3A is sandwiched between the first recess 46a of the support member 46 and the second recess 47a of the tightening member 47. Fixed. As described above, in the first endoscope 2A, the distal end portion 3c of the endoscope insertion portion 3A is measured by the measuring means 6 by the fixing portion 42, the second projecting member 43, and the locking piece 45. The side view direction N in which the measurement is performed is positioned on the support surface 40a so as to be a measurement direction P that is substantially perpendicular to the support surface 40a and from which the first projecting member 51 and the second projecting member 43 project. It is fixed, and stereo measurement can be performed toward the measurement direction P one side P1. In the above description, the locking piece 45 restricts the rotation of the distal end portion 3c around the central axis L2 and the fixing portion 42 fixes the distal end portion 3c. However, the operator fixes the central axis L2 of the distal end portion 3c. It is good also as what fixes direction with the fixing | fixed part 42 by adjusting direction around.

  Here, in the state where the distal end portion 3c of the endoscope insertion portion 3A is positioned and fixed on the support surface 40a as described above, the reference point O6 of the measuring means 6 is the other end that is the distal end of the second projecting member 43. The part 30b is set so that the position in the measurement direction P substantially coincides. 6 and 8, the second block 41 is formed with a fixing hole 41a formed in the direction of the central axis L2 of the endoscope insertion portion 3A fixed to the first block 40. Has been. The distal end portion 33a of the insertion portion 33 is inserted into the fixing hole 41a and is fastened and fixed by a fixing screw 41c screwed into a screw hole 41b communicating from the side, whereby the insertion portion 33 is fixed. Are arranged along the endoscope insertion portion 3 </ b> A fixed to the first block 40.

  Further, as shown in FIGS. 4 to 8, the contact block 32 includes a main body 50 and a substantially rod-shaped first protrusion that protrudes from the main body 50 to the measurement direction P other side P2 substantially orthogonal to the support surface 40a. It has the member 51 and the substantially rod-shaped guide member 52 which protrudes from the main-body part 50 to the measurement direction P one side P1. Four first projecting members 51 are provided in the main body portion 50 and arranged in a rectangular shape with substantially the same length. As described above, the first projecting member 51 has one end portion 30a as a reference and one of the reference lengths. To do. In addition, the first projecting member 51 can be elastically bent and deformed when an external force is applied from a direction orthogonal to the axial direction while maintaining a constant shape even when a constant external force is applied in the axial direction. The material is preferably flexible, and is formed of, for example, fiber reinforced plastic. In addition, although it varies depending on the subject to be inserted, it is preferable to display white for easy visual recognition as will be described later in consideration of measuring an internal structure with little illumination.

  Further, the guide members 52 are provided in a pair in the main body portion 50, and a pair of guide holes that penetrates the second block 41 of the main body block 31 along the measurement direction P from the support surface 40 a to the opposite side. 41d is inserted. A screw hole 41e communicates with one of the guide holes 41d from the outer surface of the second block 41, and a fixing screw 41f is screwed into the screw hole 41e. The contact block 32 is fixed to the main body block 31 by the guide member 52 being tightened by the fixing screw 41f, and is measured along the guide hole 41d by loosening the fixing screw 41f. Advancing and retreating in the direction P, it is possible to adjust the length C1 from the one end 30a serving as the tip of the first projecting member 51 to the other end 30b serving as the tip of the second projecting member 43, that is, The adjusting means 53 is constituted by the guide hole 41d, the guide member 52, and the fixing screw 41f. In order to increase the adjustment range, the length of the guide member 52 is such that the tip of the guide member 52 protrudes on the support surface 40a when the length from the one end 30a to the other end 30b is minimized. Is set. However, the positions and intervals of the guide hole 41d of the first block 40 and the guide member 52 of the contact block 32 do not interfere with the distal end portion 3c of the endoscope insertion portion 3A fixed on the support surface 40a. Thus, it is possible to move forward and backward with the tip 3c fixed. Further, by loosening the fixing screw 41f and extracting the guide member 52 from the guide hole 41d, it is possible to remove the abutment block 32 from the main body block 31, whereby the length of the first projecting member 51 is increased. It is possible to exchange with another contact block 32 having a different length.

The details of each configuration of the endoscope system 1 have been described above. Next, details of the measurement method of the measurement target inside the subject S by the endoscope system 1 will be described.
Here, as shown in FIGS. 1 and 9, for example, a structure S1 having a heat source (not shown) inside and a cooling passage S2 for cooling the heat from the heat source is set as a subject S, and both wall surfaces S2a and S2b. As an example, the case where the width B of the cooling passage S <b> 2 defined in the above is measured as a measurement target will be described. For example, the cooling passage S2 has a width B of about 10 cm in order to circulate a cooling fluid, and is provided with an inspection port S3 that communicates the outside with the cooling passage S2 at a predetermined position.

  As shown in FIG. 9, in order to measure the width B of the cooling passage S2, first, as a preparation step, the endoscope insertion portion 3B of the second endoscope 2B is inserted from the inspection port S3, and the structure The state of the cooling passage S2 inside S1 is set to an observable state. In order to observe the cooling passage S2, the distal end side of the endoscope insertion portion 3B is illuminated by illumination means (not shown) of the second endoscope 2B, but the brightness is still insufficient for observation. In this case, a light guide for auxiliary illumination may be inserted into the cooling passage S2 from the inspection port S3, and illumination light from the outside may be guided by the light guide to illuminate the cooling passage S2. When the endoscope insertion portion 3B is pushed in and reaches a desired position, the proximal end of the endoscope insertion portion 3B is pushed and pulled, the rotation around the central axis, and the bending portion by the endoscope operation portion 4B. By the bending operation 3b, the distal end of the endoscope insertion portion 3B is adjusted at the approximate center of the cooling passage S2 so that a desired direction can be observed.

  Next, the endoscope insertion portion 3A of the first endoscope 2A, the internal measurement gauge 30, and the guide tube 10 are assembled. That is, the endoscope insertion portion 3A of the first endoscope 2A is inserted through the guide tube 13 of the guide tube 10, and the distal end portion 3c is projected to the distal end side. Also, with respect to the endoscope attachment 30, the insertion portion 33 is removed from the main body block 31, only the insertion portion 33 is inserted into the channel 10a of the guide tube 10, and the distal end portion 33a is projected to the distal end side. And the main body block 31 and the contact block 32 are fixed to the front-end | tip part 33a of the insertion part 33 which protruded. In this state, the main body block 31 is fixed to the distal end portion 3c of the endoscope insertion portion 3A of the first endoscope 2A protruding from the guide tube 13.

  As for the adjusting means 53, as shown in FIGS. 5 and 6, the fixing screw 41f is loosened, and the distance C1 from the one end 30a to the other end 30b is estimated as the cooling path S2 to be measured. It is adjusted so as to be smaller than the width B of And the length C1 from the one end part 30a to the other end part 30b is previously measured with a caliper or a ruler. Thereby, the distance along the measurement direction P from the one end 30a to the reference point O6 of the measuring means 6 is measured.

  Next, as shown in FIG. 9, as an insertion process, the endoscope insertion portion 3A of the integrated first endoscope 2A, the internal measurement gauge 30, and the guide tube 10 are inserted. . At this time, in the first endoscope 2A as necessary, the endoscope operation section 4A is operated to bend and deform the bending section 3b of the endoscope insertion section 3A, and in the guide tube 10, the guide tube By operating the operation portion 12 and bending the bending portion 11b of the guide tube insertion portion 11, the insertion can be suitably performed according to the internal shape of the structure S1. Then, while being inserted, the second endoscope 2B confirms the position at the distal end portion 3c of the endoscope insertion portion 3A of the first endoscope 2A, and when it reaches the vicinity of the measurement target, it enters the cooling passage S2. Stop inserting.

  Next, as a fixing step, the endoscope insertion portion 3A, the internal measurement gauge 30, and the guide tube 10 of the integrated first endoscope 2A are fixed to the cooling passage S2. First, in the fixing means 15 of the guide tube 10, the fixing screw 17 c of the switching operation unit 17 is loosened. And as shown in FIG. 10, the leaf | plate spring 16 is protruded to the side by operating the switching operation part 17. As shown in FIG. As a result, the plate spring 16 presses the wall surfaces S2a and S2b of the cooling passage S2, and the fixing screw 17c is tightened again, whereby the guide tube insertion portion 11 and the endoscope insertion portion 3A of the first endoscope 2A are fixed. The tip side can be made stable.

  Next, as shown in FIG. 11, in the gauge position adjustment step, in the internal measurement gauge 30, the one end 30a of the abutment block 32 is a wall surface S2b that is one end of the width B of the cooling passage S2 to be measured. Adjust the position so that it touches. Furthermore, the measurement direction P by the measuring means 6 of the endoscope insertion portion 3A, which is the direction in which the first projecting member 51 and the second projecting member 43 project, with the one end 30a in contact with the wall surface S2b, The width B to be measured is adjusted to be measurable, that is, substantially perpendicular to the wall surface S2a.

  Here, the adjustment of the position of the one end portion 30a of these contact blocks 32 and the direction of the measurement direction P is performed by the endoscope operation unit 4A of the first endoscope 2A, the gripping unit 34 of the internal measurement gauge 30, And it is performed by the guide tube operation part 12 of the guide tube 10. That is, in the first endoscope 2A, by operating the joystick 4a of the endoscope operation section 4A, the bending state of the bending section 3b of the endoscope insertion section 3A is changed, and the endoscope operation section The position of the one end portion 30a of the contact block 32 and the direction of the measurement direction P are changed via the endoscope insertion portion 3A by moving the 4A forward and backward in the direction of the central axis L2 or rotating around the central axis L2. . Further, the position of the one end portion 30a of the abutment block 32 is interposed via the insertion portion 33 by operating the grip portion 34 of the internal measurement gauge 30 to advance or retract the insertion portion 33 in the axial direction or rotate around the axis. And the direction of the measurement direction P is changed. Further, in the guide tube 10, the bending state of the bending portion 11 b of the guide tube insertion portion 11 is changed by operating the bending knob 12 a of the guide tube operation portion 12, and the guide tube operation portion 12 is changed to the guide tube insertion portion 11. The position of the one end portion 30a of the abutment block 32 and the direction of the measurement direction P are changed via the guide tube insertion portion 11 by advancing and retreating in the direction of the central axis.

  Note that only one of the operation of the endoscope operation unit 4A of the first endoscope 2A or the operation of the guide tube operation unit 12 of the guide tube 10 causes the contact block 32 of the internal measurement gauge 30 to move. It is possible to adjust the position of the one end 30a and the direction of the measurement direction P. Further, if the insertion portion 33 of the internal measurement gauge 30 is provided with a bending mechanism, it is possible to perform the same adjustment only with the internal measurement gauge 30 itself. However, by adding the operation of the grip portion 34 of the internal measurement gauge 30, or the operation of the endoscope operation portion 4A of the first endoscope 2A, or the operation of the guide tube operation portion 12 of the guide tube 10. By adding the other of the above, the position of the one end portion 30a of the contact block 32 and the direction of the measurement direction P can be changed in a more complicated manner, so that it can be controlled more accurately. Further, in the internal measurement gauge 30, the insertion portion 33 is inserted into the channel 10a of the guide tube 10, and the holding portion 34 is advanced and retracted and rotated to adjust without being affected by external friction. Thus, the position of the one end 30a serving as the tip of the first projecting member 51 and the direction of the measurement direction P can be adjusted more accurately.

  The adjustment is preferably performed while confirming the relative position between the wall surface S2b of the cooling passage S2 and the one end portion 30a of the internal measurement gauge 30 by the second endoscope 2B. And the one end part 30a of each 1st protrusion member 51 is made to contact | abut to wall surface S2b. Here, the first projecting member 51 is provided with three or more, for example, four in the present embodiment, and the length of the first projecting member 51 is set to be approximately equal, so that the measurement direction P is measured. The target width B can be set in a direction substantially perpendicular to the measurable wall surfaces S2a and S2b, and is securely supported by the wall surface S2b with three or more point supports so as to have a stable posture. Can do. In addition, the first projecting member 51 is substantially rod-shaped and formed to extend in the measurement direction P other side P2, so that the one end 30a serving as the tip of each first projecting member 51 is the width B to be measured. It can be easily visually recognized from any direction whether or not it is in contact with the wall surface S2b forming the end of the. For this reason, it is possible to prevent the contact block 32 from coming into contact with the wall surface S2b in an inappropriate direction such that the one end portions 30a of all the first projecting members 51 cannot be contacted. it can. In the present embodiment, the first projecting member 51 is white. Therefore, even in an environment where there is no illumination other than the first endoscope 2A and the second endoscope 2B, such as the inside of the cooling passage S2 of the structure S1, the first difference is caused by the difference in color from the background. The protruding member 51 can be easily visually recognized, and in particular, it can be easily visually recognized by the shadow generated by illuminating the position of the one end portion 30a.

  When each end 30a of the internal measurement gauge 30 is brought into contact with the wall surface S2b, the distance C2 to the other wall surface S2a facing the distance C2 is then determined as the distance measurement step in the first endoscope 2A. Measurement is performed by the measuring means 6 provided in the endoscope insertion portion 3A. That is, as shown in FIG. 12, in the first endoscope 2A, the operator sets a predetermined position on the wall surface S2a as a reference point while checking the display 5a of the endoscope main body 5. Then, by performing stereo measurement by the measuring means 6, the distance C2 from the reference point O6 to the reference point, that is, the wall surface S2a can be measured. Here, since the distance from the reference point O6 to the one end 30a is measured in advance as the distance C1 from the other end 30b to the one end 30a, the width B of the cooling passage S2 to be measured by the sum of both. Can be measured.

  As described above, according to the internal dimension measuring method of the present embodiment, the distance actually measured by the measuring means 6 of the first endoscope 2A in the distance measuring step is one of the dimensions to be measured. It can be made smaller than the width B of the cooling passage S2 to be measured. For this reason, according to the length from the one end part 30a to the other end part 30b of the internal measurement gauge 30, the distance C2 that needs to be measured by stereo measurement with the first endoscope 2A is minimized. The measurement accuracy can be ensured regardless of the size of the measurement of the width B of the cooling passage S2 to be measured. In the present embodiment, the first endoscope 2A is attached to the internal measurement gauge 30, and the reference point O6 by the measuring means 6 is made to coincide with the other end 3b in the measurement direction P so that the width B of the cooling passage S2 is reached. Is measuring. For this reason, the point referred when performing the stereo measurement by the measuring means 6 is only one place on the wall surface S2a of the cooling passage S2. For this reason, the error which arises with the setting of a reference point in a measuring object can be minimized.

  When the distance measured by the measuring means 6 is a preset allowable value, that is, a value that cannot ensure the required measurement accuracy, remeasurement is performed as follows. First, as an extraction step, the endoscope insertion portion 3A of the first endoscope 2A, the internal measurement gauge 30, and the guide tube insertion portion 11 of the guide tube 10 are extracted once. Then, as shown in FIGS. 5 and 6, as the gauge length adjusting step, in the internal measuring gauge 30, the fixing screw 41f of the adjusting means 53 is loosened to place the contact block 32 in the measuring direction P on the other side P2. Make a certain amount of advance. Then, the fixing screw 41f is tightened again to fix the contact block 32 to the main body block 31. And again, as an insertion process, the endoscope insertion portion 3A of the first endoscope 2A, the internal measurement gauge 30, and the guide tube insertion portion 11 of the guide tube 10 are inserted into the cooling passage S2, and the gauge position The distance C1 measured by the measuring means 6 can be reduced by performing the adjustment step and the distance measurement step to measure the measurement target, and thus the width B of the cooling passage S2 to be measured is large. However, measurement accuracy can be ensured.

  Further, even in the adjustment limit by the adjustment means 53, when the distance C1 measured by the measurement means 6 is a value that cannot ensure the required measurement accuracy, the contact block fixed to the main body block 31. 32 is replaced with one having a thicker main body 50 or a longer first protrusion 51 and a larger protrusion relative to the main body block 31. Thereby, even if the width B of the cooling passage S2 to be measured is large, the measurement accuracy can be ensured.

  It should be noted that even the adjustment by the adjusting means 53 can be dealt with even if the size of the object to be measured is larger by setting the adjustable range larger. In addition, it is possible to cope by preparing various contact blocks 32 having different lengths of the first projecting member 51 only by exchanging the contact block 32 without being adjusted by the adjusting means 53. However, by using both the adjustment by the adjustment means 53 and the replacement of the contact block 32, it is possible to perform measurement with high accuracy and efficiency with respect to measurement objects having various sizes.

(Second Embodiment)
Next, a second embodiment of the present invention will be described. 13 to 23 show a second embodiment of the present invention. In this embodiment, members that are the same as those used in the above-described embodiment are assigned the same reference numerals, and descriptions thereof are omitted.

  In the endoscope system 70 used in the internal dimension measurement method of the present embodiment, the internal measurement gauge 71 that is a gauge used in stereo measurement with the first endoscope 2A in the distance measurement step is the first. This is greatly different from the endoscope 2A in that it is used without being attached. Hereinafter, the details of the internal measurement gauge 71 will be described first.

  As shown in FIGS. 13 to 15, the internal measurement gauge 71 includes an elongated and substantially tubular insertion portion 72 inserted into the subject S, and an operation portion 73 provided on the proximal end side of the insertion portion 72. And a first pair of gauge parts that can be switched by the operation of the operation part 73 from a state housed in the insertion part 72 in a closed state to an open state projecting laterally at the distal end of the insertion part 72. A gauge portion 74 and a second gauge portion 75 are provided. The operating portion 73 is provided with a gripping member 73a that can be moved back and forth in the axial direction. By operating the gripping member 73a back and forth in the axial direction, an operation of a first gauge portion 74 and a second gauge portion 75 described later is performed. I do.

  The insertion portion 72 of the internal measurement gauge 71 includes a flexible tube portion 72a having flexibility that can be bent according to the internal shape of the subject S, and a hard tip provided on the distal end side of the flexible tube portion 72a. Part 76. The flexible tube portion 72a has a substantially tubular shape, and an operation wire 77 is inserted through the proximal end of the flexible tube portion 72a. Moreover, in the insertion part 72, the front-end | tip part 76 is comprised by the substantially tubular shape connected with the flexible pipe part 72a. As shown in FIGS. 15 and 16, a pair of openings 78, 78 are formed on the outer peripheral surface of the distal end portion 76. The pair of openings 78 and 78 are formed so as to be substantially opposed to each other with the central axis L72 of the insertion portion 72 interposed therebetween corresponding to the first gauge portion 74 and the second gauge portion 75, respectively. It opens from 76a to the end surface 76b.

  As shown in FIGS. 15 and 16, a substantially cylindrical fixing portion 80 is fixed to the tip of the operation wire 77. A shaft body 80a that protrudes in a direction substantially orthogonal to the central axis L72 of the insertion portion 72 is fixed to the fixing portion 80, and the first gauge portion 74 and the second gauge portion 75 that make a pair rotate. It is pivotally supported. Each of the first gauge portion 74 and the second gauge portion 75 is configured such that the base end side of the elongated gauge body 81 is fixed to a body fixing member 82 that is pivotally supported by the fixing portion 80. 15 and 16, the first gauge portion 74 and the second gauge portion 75 are extended along the center axis L72 direction inside the insertion portion 72 and overlapped with each other. It has become.

  In addition, as shown in FIG. 17, when the gripping member 73 a of the operation unit 73 is gripped and slid to the distal end side, the operation wire 77 connected to the operation unit 73 also advances to the distal end side inside the insertion portion 72. It becomes. For this reason, the first gauge portion 74 and the second gauge portion 75 are also advanced to the distal end side via the fixing portion 80, and each gauge body 81 is inserted into the distal end side from each opening 78 of the distal end portion 76 in the insertion portion 72. Will protrude.

  Then, when the first gauge portion 74 and the second gauge portion 75 are further advanced, as shown in FIG. 18, the first gauge portion 74 and the second gauge portion 75 are formed on the main body fixing member 82, respectively. The stepped portion 82 a comes into contact with the corner portion 76 c formed in the tip portion 76 at the openings 78 and 78. For this reason, as the first gauge portion 74 and the second gauge portion 75 try to further advance toward the distal end side, each main body fixing member 82 slides laterally with respect to the corner portion 76c. The one gauge portion 74 and the second gauge portion 75 rotate sideways as a whole, and are in an open state in which the first gauge portion 74 and the second gauge portion 75 are separated as shown in FIG. In this state, the one end 71a that is the tip of the gauge body 81 of the first gauge portion 74 and the other end 71b that is the tip of the gauge portion 81 of the second gauge portion 75 are separated by a certain distance. Thus, the dimension of the measurement object can be measured with the distance as a reference. In the following, as in the first embodiment, the details of the internal dimension measuring method of the present embodiment will be described by taking as an example the case where the width B of the cooling passage S2 of the structure S1 that is the subject S is measured. The description of the same parts as those in the first embodiment is omitted.

  As shown in FIG. 20, in order to measure the width B of the cooling passage S2, the endoscope insertion portion 3A of the first endoscope 2A is inserted from the inspection port S3 as an insertion step. Next, the internal measurement gauge 71 is inserted from the inspection port S3 to a position to be measured. At this time, as a preparatory step, the internal measurement gauge 71 inserts the insertion portion 72 into the channel 10a of the guide tube 10 and pushes the guide tube 10 together. Here, in the internal measurement gauge 71, when the insertion portion 72 is inserted into the guide tube 10 in advance, or when the insertion portion 72 is inserted into the cooling passage S2 together with the guide tube 10 from the inspection port S3, a pair is formed. The one gauge part 74 and the second gauge part 75 are accommodated in the insertion part 72 in a closed state where they overlap each other. For this reason, when it is inserted in the guide tube 10 in advance, it can be suitably inserted as long as it has an outer diameter of its own insertion portion 72 or more, and it can be inserted together with the guide tube 10 from the inspection port S3. When doing so, it is possible to insert the inspection port S3 suitably as long as the diameter of the inspection port S3 is equal to or larger than the outer diameter of the guide tube 10. Then, when the tip of the guide tube insertion portion 11 reaches a desired position, as shown in FIG. 21, the plate spring 16 of the fixing means 15 presses the wall surface S2a of the cooling passage S2 as shown in FIG. 11 is fixed.

  Next, as a gauge position adjusting step, in the internal measurement gauge 71, the one end 71a that is the tip of the first gauge portion 74 contacts the wall surface S2b that is the end of the width B2 of the cooling passage S2 that is the measurement target. Adjust the position so that it touches. First, as shown in FIG. 21, by operating the bending knob 12 a of the guide tube operation section 12, the bending section 11 b of the guide tube insertion section 11 is bent and protrudes from the distal end of the guide tube insertion section 11. The direction of the insertion portion 72 of the gauge 71 is adjusted so as to substantially coincide with the direction in which the cooling passage S2 extends.

  Next, the gripping member 73a of the operation portion 73 is advanced with the distal end of the insertion portion 72 of the internal measurement gauge 71 projecting from the distal end of the guide tube insertion portion 11, thereby making the first gauge as shown in FIG. The part 74 and the second gauge part 75 are in an open state projecting to the side of the insertion part 72. Next, the endoscope insertion portion 3A of the first endoscope 2A is inserted through the guide tube 13 of the guide tube 10. Thereby, it becomes possible to preferably observe the vicinity of the distal end of the insertion portion 72 of the internal measurement gauge 71 from a position slightly shifted laterally by the first endoscope 2A. A stereo measurement adapter 3h that enables stereo measurement in the direct viewing direction is attached to the distal end of the endoscope insertion portion 3A, and the measuring means 6 is configured by the distal end body 3d and the stereo measurement adapter 3h for direct viewing. Keep it. As shown in FIG. 23, in the internal measurement gauge 71, either one of the one end 71a or the other end 71b, which is the tip of the gauge body 81 of the first gauge portion 74 and the second gauge portion 75. For example, the one end 71a is brought into contact with one wall surface S2b of the cooling passage S2 so as to be substantially vertical. At this time, the first endoscope 2A is used while confirming the orientation of the first gauge portion 74 and the second gauge portion 75 with respect to the cooling passage S2. The position and orientation of the first gauge portion 74 and the second gauge portion 75 are adjusted by pushing and pulling the proximal end of the insertion portion 72 of the internal measurement gauge 71, rotating around the central axis, and the guide tube insertion portion. 11 is performed by bending the bending portion 11b.

  If it is confirmed by the first endoscope 2A that the one end portion 71a of the internal measurement gauge 71 is in contact with one wall surface S2b of the cooling passage S2, the distance measurement is performed. As a process, the distance C2 to the other opposing wall surface S2a is measured by the measuring means 6 of the endoscope insertion portion 3A of the first endoscope 2A. That is, first, in the first endoscope 2A, the bending state of the bending portion 3b of the endoscope insertion portion 3A is changed by the operation of the endoscope operation portion 4A, and the gauge body 81 of the other second gauge portion 75 is changed. The other end portion 71b which is the tip of is made visible. Then, a predetermined position of the other end 71b of the internal measurement gauge 71 and the wall surface S2b on the other side of the cooling passage S2 is used as a reference point, and the distance C2 between them is measured in stereo. The distance C2 measured and displayed on the display 5a of the endoscope main body 5 and the other end from the one end 71a when the first gauge portion 74 and the second gauge portion 75 are in the open state. By summing the distance C1 to the portion 71b, the width B of the cooling passage S2 that is the measurement target can be accurately measured.

  Thus, by using the internal measurement gauge 71 capable of opening and closing the paired first gauge portion 74 and second gauge portion 75 in a closed state and an open state as a gauge, the inspection port S3 serving as an inlet is provided. Even if the diameter is small, at least the insertion portion 72 of the internal measurement gauge 71 can be inserted to the position to be measured as long as it has a diameter that allows insertion. And by making the 1st gauge part 74 and the 2nd gauge part 75 into an open state in the said measurement object position, even if it is a dimension larger than the diameter of the inspection port S3, it can measure accurately.

  24 to 27 show a modification of the gauge used in the internal dimension measuring method of the present embodiment. As shown in FIGS. 24 and 25, an internal measurement gauge 100 which is a gauge of this modified example includes an elongated and substantially tubular insertion portion 101 inserted into the subject, and a proximal end side of the insertion portion 101. The provided operating portion 102 and a pair of gauge portions that protrude from the distal end of the insertion portion 101 and are elastically curved to open and close from a closed state that overlaps each other by operation of the operating portion 102 to an open state that protrudes to the side. A first gauge portion 103 and a second gauge portion 104 are provided.

  As shown in FIG. 26, the insertion portion 101 includes an outer sheath 101a and an inner sheath 101b inserted into the outer sheath 101a. A hard cylindrical member 106 is provided at the distal end of the inner sheath 101 b, and both are fixed by a substantially tubular inner base 107 fitted on the inner sheath 101 b and the cylindrical member 106. A substantially tubular outer base 108 is fitted and fixed to the inner peripheral surface of the distal end of the outer sheath 101a. The outer base 108 and the inner base 106 are in contact with each other, thereby preventing the inner sheath 101b from coming off to the distal end side with respect to the outer sheath 101a.

  Further, as shown in FIG. 24, the operation unit 102 is provided with a gripping member 102 a that can advance and retract in the axial direction. The gripping member 102 a is connected to the proximal end of the operation wire 105 inserted through the inner sheath 101 b of the insertion portion 101. A proximal end of a substantially tubular connecting member 109 is externally fitted and fixed to the distal end of the operation wire 105.

  Further, as shown in FIGS. 24 to 26, the first gauge portion 103 includes a main body portion 103a having a proximal end fixed to the connecting member 109 and a distal end curved sideways, and an extension of the main body portion 103a. It is disposed on the outer peripheral side, and has a base end fixed to the outer peripheral surface of the cylindrical member 106, a distal end curved sideways, and a support portion 103b connected to the distal end of the main body portion 103a. Similarly, the second gauge portion 104 includes a main body portion 104 a and a support portion 104 b that project to the opposite side of the first gauge portion 103. The main body portion 104a is fixed at the base end to the connecting member 109, and the support portion 104b is fixed at the base end to the outer peripheral surface of the cylindrical member 106, and the distal ends thereof are connected.

  Here, the main body portion 103 a and the support portion 103 b of the first gauge portion 103 and the main body portion 104 a and the support portion 104 b of the second gauge portion 104 are configured by one leaf spring 110. That is, the leaf spring 110 has one end 110a fixed to the outer peripheral surface of the cylindrical member 106 as a base end of the support portion 103b of the first gauge portion 103, and is disposed on the distal end side, and is bent at the distal end of the support portion 103b. The main body 103a is provided. Further, it is bent as a bent portion 110 b at the base end of the main body portion 103 a, fitted and fixed to the connecting member 109, and disposed as the main body portion 104 a of the second gauge portion 104. Then, it is bent at the distal end of the main body portion 104a and disposed as a support portion 104b, and the other end 110c is fixed to the outer peripheral surface of the cylindrical member 106 as a base end of the support portion 104b at a position facing the one end 110a. In the first gauge portion 103 and the second gauge portion 104, the support portions 103b and 104b are curved with a large radius of curvature as compared with the main body portions 103a and 104a, respectively, and the overall member size is short. ing.

  For this reason, in the internal measurement gauge 100 of this modification example, in the state where no operating force is applied to the gripping member 102a of the operation unit 102, as shown in FIGS. 24 to 26, the main body 103a of the first gauge unit 103 is provided. And the main-body part 104a of the 2nd gauge part 104 is made into the state which protruded to the side as the one end part 100a and the other end part 100b as an open state, respectively. On the other hand, in a state where the gripping member 102a of the operation unit 102 is pulled by operating force, the main body 103a of the first gauge unit 103 and the main body 104a of the second gauge unit 104 are as shown in FIG. The corresponding support portions 103b and 104b are pulled toward the base end side while being elastically deformed, and are in a closed state that is substantially parallel to the central axis direction and overlaps each other. Then, by releasing the operation force applied to the gripping member 102a of the operation unit 102, the restoring force of the leaf spring 110 constituting the first gauge unit 103 and the second gauge unit 104 causes the first gauge unit 103 and the second gauge portion 104 can be opened again.

  Even in the internal measurement gauge 100 as described above, as shown in the above embodiment, after being inserted into the subject in a closed state in the insertion step, the gauge is adjusted and applied to the gripping member 102a of the operation unit 102. Release operating force. Thereby, the 1st gauge part 103 and the 2nd gauge part 104 can be made into an open state. Then, after one end 100a, which is the tip of the main body 103a of the first gauge 103, is brought into contact with one end of the measurement target and the orientation is adjusted, the main body 104a of the second gauge 104 is used as a distance measuring step. If the distance from the other end portion 100b that is the tip of the measurement object to the other end portion of the measurement target is measured, the dimension from the one end portion of the measurement target to the other end portion can be accurately measured. In the present modification, the first gauge portion 103 and the second gauge portion 104 are formed of a leaf spring 110 that can be elastically deformed, and the first gauge portion 103 and the second gauge that are in the closed state are formed. The part 104 can be opened by its own restoring force. For this reason, in the distance measurement process, the first gauge portion 103 and the second gauge portion 104 are reliably projected sideways so that the length from the one end portion 100a to the other end portion 100b is constant. Can do.

  As mentioned above, although embodiment of this invention was explained in full detail with reference to drawings, the concrete structure is not restricted to this embodiment, The design change etc. of the range which does not deviate from the summary of this invention are included.

1 is an overall configuration diagram showing an endoscope system according to a first embodiment of the present invention. In the endoscope system of a 1st embodiment of the present invention, it is a detailed figure of a tip part of each insertion part. In the endoscope system of a 1st embodiment of the present invention, it is a detailed figure of a guide tube insertion part. 1 is an overall view of an internal measurement gauge according to a first embodiment of the present invention. It is a side view which shows the detail of a main body block and a contact block in the internal measurement gauge of the 1st Embodiment of this invention. It is sectional drawing which shows the detail of a main body block and a contact block in the internal measurement gauge of the 1st Embodiment of this invention. In the internal measurement gauge of the 1st Embodiment of this invention, it is a top view which shows the detail of a main body block and a contact block. It is a bottom view which shows the detail of a main body block and a contact block in the internal measurement gauge of the 1st Embodiment of this invention. It is explanatory drawing explaining an insertion process in the internal dimension measuring method of the 1st Embodiment of this invention. It is explanatory drawing explaining a fixing process in the internal dimension measuring method of the 1st Embodiment of this invention. It is explanatory drawing explaining a gauge position adjustment process and a distance measurement process in the internal dimension measuring method of the 1st Embodiment of this invention. It is explanatory drawing explaining the detail of a gauge position adjustment process and a distance measurement process in the internal dimension measuring method of the 1st Embodiment of this invention. It is a whole block diagram which shows the endoscope system of the 2nd Embodiment of this invention. In the endoscope system of a 2nd embodiment of the present invention, it is a detailed figure of the tip part of each insertion part. It is a general view of the internal measurement gauge of the 2nd Embodiment of this invention. In the internal measurement gauge of the 2nd Embodiment of this invention, it is sectional drawing which shows the detail of the front-end | tip part of an insertion part when a pair of gauge part is the state accommodated in the closed state. In the internal measurement gauge of the 2nd Embodiment of this invention, it is explanatory drawing at the time of making it into the state which protruded to the side from an open state from the state accommodated in the insertion part by making a pair of gauge part into a closed state. In the internal measurement gauge of the 2nd Embodiment of this invention, it is explanatory drawing at the time of making it into the state which protruded to the side from an open state from the state accommodated in the insertion part by making a pair of gauge part into a closed state. In the internal measurement gauge of the 2nd Embodiment of this invention, it is explanatory drawing at the time of making it into the state which protruded to the side from an open state from the state accommodated in the insertion part by making a pair of gauge part into a closed state. It is explanatory drawing explaining an insertion process in the internal dimension measuring method of the 2nd Embodiment of this invention. It is explanatory drawing explaining a fixing process in the internal dimension measuring method of the 2nd Embodiment of this invention. It is explanatory drawing explaining a gauge position adjustment process in the internal dimension measuring method of the 1st Embodiment of this invention. It is explanatory drawing explaining the detail of a gauge position adjustment process and a distance measurement process in the internal dimension measurement method of the 2nd Embodiment of this invention. It is a general view of the gauge for internal measurement of the modification of the 2nd Embodiment of this invention. In the internal measurement gauge of the modification of the 2nd Embodiment of this invention, it is a perspective view which shows the detail of the front-end | tip part of an insertion part when a pair of gauge part is an open state. In the internal measurement gauge of the modification of the 2nd Embodiment of this invention, it is sectional drawing which shows the detail of the front-end | tip part of an insertion part when a pair of gauge part is an open state. In the internal measurement gauge of the modification of the 2nd Embodiment of this invention, it is sectional drawing which shows the detail of the front-end | tip part of an insertion part when a pair of gauge part is a closed state.

Explanation of symbols

30, 71, 100 Internal measurement gauge (gauge)
30a, 71a, 100a One end 30b, 71b, 100b The other end 43 Second projecting member (gauge)
51 First protruding member (gauge part)
74, 103 First gauge part (gauge part)
75, 104 Second gauge part (gauge part)
2A First endoscope (endoscope)
S subject S1 structure (subject)
S2 Cooling passage (measurement target)

Claims (5)

A method for measuring an internal dimension of a subject for measuring a dimension of a portion to be measured inside the subject,
An insertion step of inserting a gauge that has previously measured the length from one end to the other end up to the measurement object inside the subject;
A gauge position adjusting step of bringing the one end of the gauge into contact with the one end of the measuring object and adjusting the orientation of the gauge so as to follow the measuring direction of the measuring object;
A distance measurement step of measuring a distance from the other end of the gauge to the other end of the measurement object by performing stereo measurement with an endoscope inserted into the subject. A method for measuring the internal dimensions of a subject. The method for measuring an internal dimension of an object according to claim 1,
In the insertion step, with the other end portion of the gauge as a reference point, the endoscope is attached to the gauge so that a distance can be measured from the reference point toward the opposite side of the one end portion along the gauge. A method for measuring an internal dimension of a subject, wherein the method is inserted together with the gauge in an attached state. The method for measuring an internal dimension of a subject according to claim 1 or 2,
In the gauge position adjusting step, the one end portion of the gauge is brought into contact with the one end portion of the measurement object at at least three points or more, and the internal dimension measuring method of the subject is characterized. The method for measuring an internal dimension of a subject according to any one of claims 1 to 3,
In the distance measurement step, if the length measured by stereo measurement with the endoscope is larger than a preset allowable value, the dimension from the one end to the other end of the gauge is increased. A method for measuring an internal dimension of a subject, wherein the distance measuring step is performed again. The method for measuring an internal dimension of a subject according to any one of claims 1 to 4,
The gauge is opened in a state where the one end and the other end are separated from a closed state where the first gauge having the one end and the second gauge having the other end overlap each other. It can be opened and closed until it reaches a state,
In the inserting step, the first gauge part and the second gauge part are inserted into the subject as the closed state,
In the gauge position adjusting step, the first gauge portion and the second gauge portion are in the open state, and the one end portion of the gauge is brought into contact with the one end portion of the measurement object. A method for measuring the internal dimensions of a specimen.

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