JP6596982B2 - Inside micrometer fixing device - Google Patents

Description

  The present invention relates to an inside micrometer fixing device.

  For example, when performing axial alignment of a vertical shaft type turbine (for example, Francis turbine) installed in a hydroelectric power plant and a bearing member (for example, an upper blanket, a lower blanket, a turbine bearing stand) for the vertical axis generator, In the state where the vertical shaft generator was removed, the weight was suspended from a plurality of measurement points on one circumference on the inner peripheral surface of the bearing member and from the vicinity of the center of the bearing member using an inside micrometer. Measure the distance between the piano wire hanging in the state and the piano wire so that the distances between the measurement points on the inner circumference of the bearing member and the piano wire are equal. A technique is known in which axis alignment is performed by adjusting the drooping position of a line (for example, Patent Document 1).

JP 2008-209155 A

  For example, when the power generation output obtained from the vertical shaft generator is to be increased, the vertical shaft generator is increased in size, and accordingly, the bearing member is also increased in size. When the size of the bearing member is increased, the distance between the inner peripheral surface of the bearing member and the piano wire is increased, so that the entire length of the inside micrometer needs to be set long.

  However, if the inside micrometer is set to a long overall length, the worker cannot measure the distance between the inner peripheral surface of the bearing member and the piano wire alone, or the worker is alone the inner peripheral surface of the bearing member. Even if the distance between the piano wire and the piano wire can be measured, the operator must keep his hands wide to support the inside micrometer and keep it horizontal while maintaining the distance between the inner peripheral surface of the bearing member and the piano wire. Therefore, there is a possibility that it cannot be measured accurately with a stable posture.

  Therefore, according to the present invention, the distance between the first object to be measured and the second object to be measured is such that the worker cannot perform the measurement work alone or the worker cannot perform the stable measurement work alone. Even if it is such a distance, it aims at providing the fixing device of the inside micrometer which an operator can perform a measurement operation | work with a stable attitude | position accurately.

A main aspect of the present invention that solves the above-described problems is a rod portion that contacts a first object to be measured made of a metal material that can be coupled to a magnet, and a head portion that contacts the second object to be measured. And a fixing device for fixing an inside micrometer for measuring a distance between the tip of the rod part and the tip of the head part to the first object to be measured, wherein the tip of the rod part so they contact with the first object to be measured, comprising a housing made of a magnetic material that binds to the first object to be measured holds the rod portion, wherein the housing, than the diameter of the rod portion A first through hole into which the rod portion is inserted, a second through hole penetrating through the first through hole in a direction orthogonal to the first through hole, and the rod portion In the state inserted in the first through hole, the second It includes a through hole, and a bolt inserted through a third through hole penetrating in a direction perpendicular to the longitudinal direction of the rod portion, a state where the rod portion is inserted into the first through hole a holding device for holding the, viewed including setting a device, the set to one of the states of the state where the casing was being released state or magnetizable magnetization, the rod portion, the rotary shaft of the bolt As mentioned above, it can be rotated within the range of the diameter of the first through hole .

  Other features of the present invention will become apparent from the accompanying drawings and the description of this specification.

  According to the present invention, the distance between the first object to be measured and the second object to be measured is such that the worker cannot perform the measurement work alone or the worker cannot perform the stable measurement work alone. Even if it is such a distance, it becomes possible for an operator to perform measurement work with high accuracy in a stable posture.

(A) is a diagram showing a state of the fixing device according to the present embodiment as viewed from the front, (B) is a diagram illustrating a state of the fixing device according to the present embodiment as viewed from the back, and (C) is a diagram illustrating the present embodiment. The figure which shows a mode that the fixing device which concerns is seen from one side, (D) is a figure which shows a mode that the fixing device which concerns on this embodiment is seen from the other side. It is a block diagram which shows the function of the fixing device which concerns on this embodiment. It is a perspective view which shows the state before mounting | wearing with an inside micrometer with respect to the fixing device which concerns on this embodiment. It is a perspective view which shows the state which mounted | wore the inside micrometer with respect to the fixing device which concerns on this embodiment. It is a figure which shows a mode that the axial alignment of the vertical axis | shaft water turbine installed in the hydroelectric power plant and the vertical axis | shaft generator is performed using the fixing device and inside micrometer which concern on this embodiment. It is a partially expanded view which shows a mode that the vertical axis | shaft water turbine installed in the hydroelectric power station and the vertical axis | shaft generator are aligned using the fixing device and inside micrometer which concern on this embodiment.

  At least the following matters will become apparent from the description of this specification and the accompanying drawings.

=== Configuration of Fixed Device ===
FIG. 1A is a diagram illustrating a state in which the fixing device according to the present embodiment is viewed from the front, FIG. 1B is a diagram illustrating the state in which the fixing device according to the present embodiment is viewed from the back, and FIG. ) Is a diagram showing a state where the fixing device according to the present embodiment is viewed from one side surface, and FIG. 1D is a diagram illustrating a state where the fixing device according to the present embodiment is viewed from the other side surface. FIG. 2 is a block diagram illustrating functions of the fixing device according to the present embodiment. FIG. 3 is a perspective view showing a state before the inside micrometer is attached to the fixing device according to the present embodiment. FIG. 4 is a perspective view showing a state in which the inside micrometer is attached to the fixing device according to the present embodiment. The X axis is an axis along a direction orthogonal to both side surfaces of the fixing device, the Y axis is an axis along a direction orthogonal to the front surface and the back surface of the fixing device, and the Z axis is a top surface and a bottom surface of the fixing device. It is an axis along the direction orthogonal to.

  Hereinafter, the fixing device according to the present embodiment will be described with reference to FIGS. As the inside micrometer to be mounted on the fixing device according to the present embodiment, for example, an addition type inside micrometer that can change the total length of the rod portion in several stages according to the measurement distance is adopted. .

  The extension type inside micrometer 1 includes a head portion 1A and a rod portion 1B. The head unit 1A includes, for example, a dial-type operation unit 1C that is operated when measuring the distance between the objects to be measured, a scale 1D that represents a measurement result of the distance between the objects to be measured, and a contact that makes contact with the object to be measured. It includes a piece 1E and a male screw 1F that is detachably coupled to the rod portion 1B. Moreover, the rod part 1B is comprised including the rod part 1G and the some additional rod part 1H, for example. The rod portion 1G has a female screw 1J and a male screw 1K. The extension rod portion 1H has a female screw 1L and a male screw 1M. Then, when the male screw 1F of the head portion 1A and the female screw 1J of the rod portion 1G are screwed together, the head portion 1A and the rod portion 1G are coupled, and the male screw 1K of the rod portion 1G and the female screw of the additional rod portion 1H. When 1L is screwed, the rod portion 1G and the additional rod portion 1H are coupled, and the female screw 1L of the additional rod portion 1H and the male screw 1M of the adjacent additional rod portion 1H are screwed together, thereby adjacent adjacent rods. The parts 1H are joined together. Among the plurality of extension rod portions 1H, the extension rod portion 1H (hereinafter referred to as the tip extension rod portion 1P for convenience of explanation) coupled to the tip opposite to the head portion 1A is orthogonal to the longitudinal direction. A through hole 1N is drilled in the direction of the direction. In the present embodiment, the head portion 1A and the rod portion 1B are made of a metal material having conductivity.

  The housing 2 (fixing device) is a relay device that couples the inside micrometer 1 to the first object to be measured. In addition, the 1st to-be-measured object which is the object to which the inside micrometer 1 is couple | bonded shall be formed using the metal material (for example, Fe, Co, Ni) coupleable with a magnet. The housing 2 is formed using a magnetic material, and is coupled to the constituent surface of the first device under test in a magnetized state. When the housing 2 is coupled to the first object to be measured, the tip adding rod part is arranged so that the male screw 1M of the tip adding rod part 1P in the inside micrometer 1 is in contact with the constituent surface of the first object to be measured. Hold 1P. The housing 2 has a substantially rectangular parallelepiped shape. A through hole 2C that penetrates the center of the front surface 2A and the back surface 2B along the Y axis is formed in the front surface 2A and the back surface 2B of the housing 2. The through hole 2C is a hole through which the tip extension rod portion 1P is inserted, and has a diameter larger than the diameter of the tip extension rod portion 1P. Both side surfaces 2D and 2E of the housing 2 are provided with through holes 2F penetrating through the centers of the side surfaces 2D and 2E along the X axis so as to pass through the through holes 2C. When the tip extension rod portion 1P is inserted into the through hole 2C so that the male screw 1M of the tip extension rod portion 1P contacts the component surface of the first object to be measured, the through hole 2F passes through the through hole 1N. Thus, the two side surfaces 2D and 2E of the housing 2 are penetrated. In this state, when the bolt 2G is inserted into the through hole 2F on the side surface 2D, the male screw 2H of the bolt 2G projects from the through hole 2F on the side surface 2E through the through hole 1N. The wing nut 2L is screwed with the male screw 2H of the bolt 2G via the washer 2M from the side surface 2E side. By tightening the wing nut 2L, the inside micrometer 1 is held in the housing 2. The housing 2 includes a setting circuit 2J that sets the housing 2 to either the magnetized state or the demagnetized state. The housing 2 has a switch 2K that generates an instruction for selectively setting the housing 2 to a magnetized state or a demagnetized state. The switch 2K is attached to the front surface 2A of the housing 2 so as to be easily operated by an operator, and is connected to the setting circuit 2J through a signal line. When the setting circuit 2J generates a magnetic field to the housing 2 and the housing 2 is magnetically polarized to become a magnet (when the housing 2 is set in a magnetized state), the inside micrometer 1 The back surface 2B of the housing 2 to which is attached is coupled to the constituent surface of the first device under test, whereby the housing 2 is coupled with the first device under test. On the other hand, when the setting circuit 2J stops generating the magnetic field to the housing 2 (when the housing 2 is set in a state in which the magnetization is released), the housing 2 is removed from the first object to be measured.

=== Application Example of Fixed Device ===
FIG. 5 is a diagram showing a state in which the vertical shaft turbine installed in the hydroelectric power plant and the bearing members of the vertical shaft generator are aligned using the fixing device and the inside micrometer according to the present embodiment. . For convenience of explanation, the upper foundation, the lower foundation, the casing, and the draft are shown in cross section. FIG. 6 is a partially enlarged view showing a state in which the vertical shaft water turbine installed in the hydroelectric power plant and the bearing member of the vertical shaft generator are aligned using the fixing device and the inside micrometer according to the present embodiment. FIG.

  Hereinafter, with reference to FIG. 1 to FIG. 6, using the inside micrometer attached to the fixing device according to the present embodiment, the vertical shaft water turbine installed in the hydroelectric power plant and the bearing member of the vertical shaft generator A case where the axes are aligned will be described. For convenience of explanation, it is assumed that the vertical shaft type turbine and the vertical shaft type generator are removed from the foundation.

  If the hydroelectric power plant is continuously operated, the operating time will elapse and the equipment will be worn or corroded, or the equipment will be worn or corroded and the power cannot be supplied stably. There is a fear. Therefore, in order to supply power stably, a new overhaul inspection work is newly performed on a hydroelectric power generation facility that has been in a certain number of years (for example, 12 to 15 years) since the last overhaul inspection work. Is planned. Specifically, the hydroelectric power generation equipment (vertical shaft turbine, vertical shaft generator, upper blanket, lower blanket, metal support, etc.) is removed from the foundation and disassembled and inspected. After the replacement, the work to reassemble the hydroelectric power generation equipment on the foundation will be performed. Here, when the hydroelectric power generation equipment is assembled and operated on the foundation, the upper blanket, lower blanket, It is important to align the metal support. Then, the operation | work process at the time of aligning an upper blanket, a lower blanket, and a metal support using the inside micrometer with which the fixing device concerning this embodiment was equipped is explained below.

<< Installation structure of vertical shaft type water turbine and vertical shaft type generator >>
As a structure in which the vertical turbine and vertical generator are mounted with the rotary shaft supported by the runner of the vertical turbine connected to the rotary shaft of the vertical generator, the vertical turbine and vertical shaft are installed in the center. A two-stage foundation (a lower foundation 11 and an upper foundation 12) having a space 10 in which a rotating mechanism of the type generator is disposed is formed.

  The lower foundation 11 is a foundation to which a vertical shaft type water turbine is attached. A casing 13 and a draft 14 which are part of a vertical shaft type water turbine are formed below the lower foundation 11. The casing 13 is an outer shell having, for example, a spiral shape that forms a water flow for flowing water from the upstream side into the runner of the vertical shaft type water turbine. The draft 14 is a pipe line through which the rotational force of the vertical shaft type water turbine is transmitted to the vertical shaft type generator as the runner rotates, and water that has become unnecessary after rotating the runner flows downstream. In addition, when disassembling and inspecting the hydroelectric power generation facility, the supply of water from the upstream side to the casing 13 is stopped, and the draft 14 closes the drainage port with the flat lid 15 being in a horizontal state. In addition, the flow path between the upstream pipeline and the downstream pipeline is blocked. A metal support 16 (first object to be measured) is attached to the space 10 side of the lower foundation 11. The metal support 16 is a bearing member that rotatably supports a rotating shaft extending upward from a runner of the vertical shaft type water turbine.

  The upper foundation 12 is a foundation to which a vertical shaft type generator is attached. A lower blanket 17 (first object to be measured) is attached to the space 10 side of the upper foundation 12. A vertical shaft generator stator 18 is attached to the upper portion of the upper base 12. An upper blanket 19 (first object to be measured) is attached to the upper portion of the stator 18. The lower blanket 17 and the upper blanket 19 are bearing members that rotatably support the rotating shaft of the vertical shaft generator connected to the rotating shaft of the vertical shaft type water turbine.

  When the overhaul of the hydroelectric power plant is completed, the metal support 16 is attached to the lower foundation 11, the lower blanket 17 is attached to the upper foundation 12, and the upper blanket 19 is attached to the stator 18 in order to perform axial alignment. It is assumed that a scaffold for performing an axis alignment operation is installed in the space 10 in advance.

<< Centering measuring device >>
In the present embodiment, as means for performing axial alignment among the metal support 16, the lower blanket 17, and the upper blanket 19, for example, a gantry 20, a piano wire 21 (dashed line), a weight 22, and oil-filled A centering measuring device including a container 23, a piano wire fine movement device 24, a battery 25, and a receiver 26 is used. The gantry 20 is installed on the upper surface of the upper blanket 19 so as to straddle the space 10. A weight 22 is attached to the tip of the piano wire 21. The oil-filled container 23 is installed at the center of the lid 15 that closes the pipe line of the draft 14. It is assumed that the installation position of the oil-filled container 23 coincides with the center position of the water wheel. The piano wire fine movement device 24 is a device that adjusts the displacement of the piano wire 21 with respect to the upper blanket 19. The piano wire fine movement device 24 is a device that is installed on the upper surface of the gantry 20 and supports the piano wire 21 to which a certain tension is applied in a state where the weight 22 is dropped into the oil-filled container 23. In this way, the piano wire 21 is suspended in the vertical direction without being bent along the central axis of the water wheel. The battery 25 is a battery serving as a power source for operating the centering measurement apparatus. The receiver 26 emits a sound such as “grinding” generated when both ends of the inside micrometer 1 are in contact between the first object to be measured (metal support 16, lower blanket 17, upper blanket 19) and the piano wire 21. It is a device to check.

<< Centering measurement method >>
First, the operator adjusts the length of the rod portion 1 </ b> B in the inside micrometer 1 so that the distance between the piano wire 21 and the upper blanket 19 can be measured. For example, the rod portion 1B is in a state in which the number of additional rod portions 1H (including the distal end additional rod portion 1P) corresponding to the distance between the piano wire 21 and the upper blanket 19 is added to the rod portion 1G. It has become. (Process 1)

  Next, the operator, with respect to the through-hole 2C of the housing 2, has a tip end of the rod portion 1B opposite to the head portion 1A in the inside micrometer 1, that is, a tip extension rod opposite to the rod portion 1G. Part 1P is inserted. Then, when the operator inserts the bolt 2G into the through hole 2F from the side surface 2D side in a state where the tip of the male screw 1M of the rod portion 1P is flush with the back surface 2B, the bolt 2G takes the through hole 1N. Projecting from the through hole 2F on the side surface 2E. Then, the wing nut 2L is screwed into the bolt 2G and tightened so that the bolt 2G cannot be removed from the insertion hole 2F. As a result, the inside micrometer 1 is held in the housing 2. (Process 2)

  Next, the operator advances the scaffold while carrying the inside micrometer 1 and moves to a position where the distance between the piano wire 21 and the upper blanket 19 can be measured. Further, the operator operates the switch 2K to set the housing 2 in a magnetized state. Then, the operator brings the back surface 2B of the housing 2 into contact with the inner peripheral surface of the upper blanket 19 (the tip end is added and the male screw 1M of the rod portion 1P is brought into contact with the inner peripheral surface of the upper blanket 19). As a result, the inside micrometer 1 is coupled to the upper blanket 19 via the housing 2. (Process 3)

  Next, the operator operates the operation unit 1 </ b> C to adjust the base point of the scale 1 </ b> D, and then operates the operation unit 1 </ b> C so that the contact piece 1 </ b> E contacts the piano wire 21. At this time, even if the contact piece 1E is slightly deviated from the piano wire 21, the inside micrometer 1 is rotated within the range of the diameter of the through hole 2C (+ Z to −Z) with the bolt 2G as the rotation axis. Since it can be moved, the position of the contact piece 1E can be finely adjusted. When the contact piece 1E comes into contact with the piano wire 21, the inside micrometer 1, the battery 25, and the receiver 26 form a closed circuit, and the receiver 26 generates a sound such as “jirigiri”. The operator confirms the value of the scale 1D (measurement distance between the piano wire 21 and the upper blanket 19) when a sound such as “buzz” is generated from the receiver 26, and stores it in the memory of the terminal device, for example. deep. (Process 4)

  Next, the operator operates the switch 2K to set the housing 2 from a magnetized state to a demagnetized state. Thereby, the inside micrometer 1 is removed from the upper blanket 19. (Process 5)

  In the present embodiment, one contact point (measurement point) between the male screw 1M of the inside micrometer 1 and the inner peripheral surface of the upper blanket 19 so that the axis of the upper blanket 19 is accurately aligned with the axis of the casing 13. The distance between the piano wire 21 and the upper blanket 19 is measured with respect to a plurality of measurement points (for example, 8 measurement points) on one circumference overlapping with each other. As described in steps 3 to 5 above, the distance between the piano wire 21 and the upper blanket 19 has already been measured for one measurement point. The above steps 3 to 5 are repeated. (Step 6)

  Next, the operator adjusts the position of the upper blanket 19 while adjusting the position of the piano wire 21 relative to the upper blanket 19 so that the values of the scale 1D at the plurality of measurement points are equal. (Step 7)

  Next, the operator adjusts the length of the rod portion 1 </ b> B in the inside micrometer 1 to a length capable of measuring the distance between the piano wire 21 and the lower blanket 17. For example, the rod portion 1B is connected to the piano wire 21 and the lower blanket 19 with respect to the rod portion 1G, with one end extension rod portion 1P opposite to the rod portion 1G being attached to the housing 2. The number of extension rods 1H corresponding to the distance between the two is added. In addition, when it is not necessary to adjust the length of the rod part 1B with the process 1, it progresses to the next process. (Process 8)

  Next, the operator advances the scaffold while carrying the inside micrometer 1 and moves to a position where the distance between the piano wire 21 and the lower blanket 17 can be measured. Further, the operator operates the switch 2K to set the housing 2 in a magnetized state. Then, the operator brings the back surface 2B of the housing 2 into contact with the inner peripheral surface of the lower blanket 17 (the front end is added and the male screw 1M of the rod portion 1P is brought into contact with the inner peripheral surface of the lower blanket 17). As a result, the inside micrometer 1 is coupled to the lower blanket 17 via the housing 2. (Step 9)

  Next, the operator operates the operation unit 1 </ b> C to adjust the base point of the scale 1 </ b> D, and then operates the operation unit 1 </ b> C so that the contact piece 1 </ b> E contacts the piano wire 21. When the contact piece 1E comes into contact with the piano wire 21, the inside micrometer 1, the battery 25, and the receiver 26 form a closed circuit, and the receiver 26 generates a sound such as “jirigiri”. The operator confirms the value of the scale 1D (measurement distance between the piano wire 21 and the lower blanket 17) when the receiver 26 generates a sound such as “grinding”, and stores it in the memory of the terminal device, for example. deep. (Process 10)

  Next, the operator operates the switch 2K to set the housing 2 from a magnetized state to a demagnetized state. Thereby, the inside micrometer 1 is removed from the lower blanket 17. (Step 11)

  In this embodiment, one contact point (measurement point) between the male screw 1M of the inside micrometer 1 and the inner peripheral surface of the lower blanket 17 so that the axis of the lower blanket 17 and the axis of the upper blanket 19 are accurately aligned. The distance between the piano wire 21 and the lower blanket 17 is measured with respect to a plurality of measurement points (for example, 8 measurement points) on the circumference of one circle overlapping with (). As described in Step 9 to Step 11 above, the distance between the piano wire 21 and the lower blanket 17 has already been measured for one measurement point. The above steps 9 to 11 are repeated. (Step 12)

  Next, the operator adjusts the position of the lower blanket 17 so that the values of the scale 1D at the plurality of measurement points are equal. (Step 13)

  Next, the operator adjusts the length of the rod portion 1 </ b> B in the inside micrometer 1 to such a length that the distance between the piano wire 21 and the metal support 16 can be measured. For example, the rod portion 1B has a piano wire 21 and a metal support 16 with respect to the rod portion 1G, with one end connecting rod portion 1P on the opposite side of the rod portion 1G attached to the housing 2. The number of extension rods 1H corresponding to the distance between the two is added. In addition, when it is not necessary to adjust the length of the rod part 1B with the process 8, it progresses to the next process. (Step 14)

  Next, the operator advances the scaffold while carrying the inside micrometer 1 and moves to a position where the distance between the piano wire 21 and the metal support 16 can be measured. Further, the operator operates the switch 2K to set the housing 2 in a magnetized state. Then, the operator brings the back surface 2B of the housing 2 into contact with the inner peripheral surface of the metal support 16 (the tip end is added and the male screw 1M of the rod portion 1P is brought into contact with the inner peripheral surface of the metal support 16). As a result, the inside micrometer 1 is coupled to the metal support 16 via the housing 2. (Step 15)

  Next, the operator operates the operation unit 1 </ b> C to adjust the base point of the scale 1 </ b> D, and then operates the operation unit 1 </ b> C so that the contact piece 1 </ b> E contacts the piano wire 21. When the contact piece 1E comes into contact with the piano wire 21, the inside micrometer 1, the battery 25, and the receiver 26 form a closed circuit, and the receiver 26 generates a sound such as “jirigiri”. The operator confirms the value of the scale 1D (measurement distance between the piano wire 21 and the metal support 16) when the receiver 26 generates a sound such as “grinding”, and stores it in the memory of the terminal device, for example. deep. (Step 16)

  Next, the operator operates the switch 2K to set the housing 2 from a magnetized state to a demagnetized state. Thereby, the inside micrometer 1 is removed from the metal support 16. (Step 17)

  In the present embodiment, one contact point (measurement point) between the male screw 1M of the inside micrometer 1 and the inner peripheral surface of the metal support 16 so that the axis of the metal support 16 accurately matches the axis of the upper blanket 19. The distance between the piano wire 21 and the metal support 16 is measured with respect to a plurality of measurement points (for example, 8 measurement points) on the circumference of the circle overlapping each other. As described in steps 15 to 17 above, since the distance between the piano wire 21 and the metal support 16 has already been measured for one measurement point, the operator can The above steps 15 to 17 are repeated. (Step 18)

  Next, the operator adjusts the position of the metal support 16 so that the values of the scale 1D at the plurality of measurement points are equal. (Step 19)

  By performing the above steps, the alignment of the upper blanket 19, the lower blanket 17, and the metal support 16 is completed.

  As described above, in this embodiment, the rod portion 1B whose tip contacts the bearing member (upper blanket 19, lower blanket 17, metal support 16) made of a metal material that can be coupled to the magnet, and the piano wire 21. As a member for fixing the inside micrometer 1 that measures the distance between the tip of the rod portion 1B and the tip of the head portion 1A to the bearing member. The rod portion 1B has a casing 2 made of a magnetic material that holds the rod portion 1B and is coupled to the bearing member so that the tip of the rod portion 1B (tip extension rod portion 1P) contacts the bearing member. . The housing 2 has a through hole 2C into which the rod portion 1B is inserted, a screw hole 2F and a bolt 2G that hold the rod portion 1B inserted into the through hole, and a state in which the housing 2 is magnetized or magnetized. The setting circuit 2J and the switch 2K are set to be set to any one of the released states. According to this embodiment, the distance between the bearing member and the piano wire 21 cannot be measured by an operator alone, or the operator can not perform a stable measurement operation alone. Even if it is such a distance, it becomes possible for an operator to perform measurement work with high accuracy in a stable posture.

  The housing 2 according to the present embodiment has a substantially rectangular parallelepiped shape. And according to this embodiment, it becomes possible to couple | bond the inside micrometer 1 with respect to said bearing member reliably.

  Moreover, in this embodiment, the rod part 1B of the inside micrometer 1 is comprised including the rod part 1G and the some extension rod part 1H which can be added with respect to the rod part 1G. And according to this embodiment, it becomes possible to measure a some measurement distance with the one inside micrometer 1 by the increase / decrease in the extension rod part 1H. Further, as a plurality of extension rod portions 1H, extension rod portions 1H having different lengths may be prepared.

  In addition, said embodiment is for making an understanding of this invention easy, and is not for limiting this invention to the axial alignment of a hydroelectric power generation installation. The present invention can be changed and improved without departing from the gist thereof, and the present invention includes equivalents thereof.

DESCRIPTION OF SYMBOLS 1 Inside micrometer 1A Head part 1B Rod part 1C Operation part 1D Scale 1E Contact piece 1F Male screw 1G Rod part 1H Extension rod part 1P Tip extension rod part 1N Insertion hole 2 Housing | casing 2A Front surface 2B Rear surface 2C Through-hole 2D, 2E Side 2F Insertion hole 2G Bolt 2H Male screw 2J Setting circuit 2K Switch 2L Wing nut 2M Washer 10 Space 11 Lower foundation 12 Upper foundation 13 Casing 14 Draft 15 Lid 16 Metal support 17 Lower blanket 18 Stator 19 Upper blanket 20 Mounting base 21 Piano wire 22 Weight 23 Oil-filled container 24 Piano wire fine movement device 25 Battery 26 Receiver

Claims (6)

A rod portion whose tip is in contact with a first object to be measured, which is made of a metal material that can be coupled to a magnet, and a head portion whose tip is in contact with a second object to be measured; An inside micrometer that measures the distance between the head and the tip of the head part, and a fixing device that fixes the inside micrometer to the first measured object,
A housing made of a magnetic material that holds the rod part and is coupled to the first object to be measured so that the tip of the rod part contacts the first object to be measured;
The housing is
A first through-hole having a diameter larger than the diameter of the rod part, into which the rod part is inserted;
A second through hole penetrating through the first through hole in a direction perpendicular to the first through hole; and the second through hole in a state where the rod portion is inserted into the first through hole; A third through hole penetrating in a direction orthogonal to the longitudinal direction of the rod portion, and a bolt inserted through the third through hole, and holding the rod portion inserted into the first through hole When,
See containing and a setting device for setting either one of the states of the state where the casing was being released state or magnetizable magnetization,
The inside micrometer fixing device , wherein the rod portion is rotatable within the range of the diameter of the first through hole with the bolt as a rotation axis . The setting device includes:
A setting circuit that is provided inside the housing and sets the housing in a magnetized state or a demagnetized state;
A switch that is provided outside the casing and gives an instruction to the setting circuit to set the casing in a magnetized state or a demagnetized state;
The inside micrometer fixing device according to claim 1, further comprising: Wherein the housing, the fixing device of the inside micrometer according to claim 1 or 2, characterized in that exhibits a substantially rectangular parallelepiped shape. The rod portion includes a plurality of extension rod portions that can be added,
The inside micrometer fixing device according to any one of claims 1 to 3 , further comprising: 5. The inside micrometer fixing device according to claim 4 , wherein each of the plurality of extension rod portions has a different length. The first object to be measured is a bearing member for a vertical shaft type water turbine and a vertical shaft type generator,
The second object to be measured is a piano wire that hangs down with a weight attached from the center of the first object to be measured,
The inside micrometer fixing device according to any one of claims 1 to 5 , wherein the inside micrometer measures a distance between an inner peripheral surface of the bearing member and the piano wire.

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