JP2008209155A - Auxiliary device and method for alignment - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To easily and rapidly allow alignment by designing a method of setting an axial position, and to omit the windbreak process performed before the alignment. <P>SOLUTION: An auxiliary device for alignment detects deviation amount and deviation direction of the axial position of first and second objects that have a circular opening and are temporarily installed so that the axes of respective openings exist on substantially the same straight line. The auxiliary device includes a laser irradiation apparatus 10 for irradiating the opening of the second object with a light beam LB1 along the axis of the opening of the first object from one end of the opening of the first object, an optical receiver 20 that is arranged so that two joints of its one end are in contact with the inner surface of the opening of the second object, receives a light beam at the other end around the axis of the opening of the second object, and outputs the position information of the received light beam, and a computer 40 for entering the position information output from the optical receiver 20 and detecting the deviation amount and deviation direction of the axial position of the openings of the first and second objects. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an axis alignment auxiliary device and an axis alignment method that can be applied to axis alignment of vertical shaft type water turbines and bearing members for vertical axis generators. Specifically, it is information output from the light receiving means arranged at the opening of the second object, and inputs the positional information of the light beam irradiated along the axis of the opening of the first object, Provided with information processing means for detecting the shift amount and the shift direction of the axial center positions of the openings of the first and second objects so that the axes can be easily and quickly aligned, and the windbreak performed before the alignment The process can be omitted.

  At hydropower plants, water turbines and generators are regularly inspected and maintained in order to maintain functions and preventive maintenance. These inspections and care are performed by stopping the water turbine and the generator and then disassembling and examining the deterioration status of each member. For example, when inspecting vertical shaft Francis turbines and vertical generators, almost all members except casings, drafts, etc., fixed to the foundation, main shaft, runner, upper blanket, generator rotor The lower blanket is disassembled and removed temporarily.

  Each member disassembled in this way is inspected and maintained, and assembled again in the state before disassembly. In this assembly, first, the bearing members such as the upper blanket and the lower blanket are temporarily assembled and aligned, and the installation position of the bearing member is determined, and then marked with a positioning bracket (knock) or the like. The bearing member is disassembled once, and the bearing member is reassembled in a state where rotating members such as a main shaft and a runner are inserted.

  Therefore, in the axial alignment of the bearing member, if the shaft centers of the bearing members are shifted from each other or not perpendicular to the ground, the rotational axis of the rotating member inserted into the bearing and assembled is displaced, This may increase vibration during operation and increase the bearing temperature. Therefore, the shaft alignment of the bearing members in this assembly process is a very important process and needs to be performed carefully.

  Conventionally, in the process of aligning the bearing member, first, the bearing member is temporarily installed on a base, and a base is attached to an upper part, for example, an opening of the upper blanket. The piano wire to which is attached is hung downwards, is aligned with the axial center position of a predetermined fixing member, is determined as the position of the rotating shaft, and the mounting position of other bearing members such as a lower blanket is determined. It is often performed in the procedure of adjusting. At this time, in order to prevent the suspended piano wire from shaking, there are many cases where a suspended weight is put into a container filled with oil.

  In many of the shaft alignment operations for bearing members, the distance between the piano wire and the inner surface of each member is measured with a measuring instrument such as an inside micrometer. Is done as you move. In the distance measurement with the inside micrometer, while keeping the inside micrometer in a horizontal state, it is necessary to measure with one end part touching the piano wire and the other end touching the inner surface of the bearing member. Skill and skill are required.

  In relation to this, a centering measurement method and a measurement apparatus for a water turbine generator as disclosed in Patent Document 1 are disclosed. According to this centering measurement method, the installation of the turbine generator by the piano wire centering method includes a step of measuring the distance between the fixed object and the attachment and the piano wire by a sensor, and the installation of the piano wire and the equipment based on the actual measurement data. By calculating and displaying the movement amount relating to the center position, even an inexperienced worker can perform centering measurement without skill.

  Further, a centering measuring device and a measuring method as disclosed in Patent Document 2 are also disclosed. According to this centering measurement device, the suspension frame is supported horizontally by a thin line (for example, a piano wire) suspended vertically from the upper part, and includes a measuring device in which a non-contact XY sensor for detecting the position of the thin line is attached. By allowing the measuring device to detect the distance between the reference position and the inner surface of the cylinder, the man-hours required for centering measurement can be reduced, and the centering can be performed safely without the need for a scaffold in a high place.

  Furthermore, a centering measuring device and a measuring method as disclosed in Patent Document 3 are also disclosed. According to this centering measuring device, the measuring device of Patent Document 2 further includes an independent XY table for piano wire, and hangs the piano wire from the XY table for piano wire, and a plurality of wires from the conventional rotating table for gantry. The suspension time of the piano wire and the measuring device can be shortened by suspending the measuring device.

  Furthermore, a shaft runout measuring method and measuring apparatus for a water turbine generator as shown in Patent Document 4 are also disclosed. According to this shaft run-out measurement method, the horizontal adjustment measurement and each shaft run-out adjustment measurement performed together with the assembly process, and the total run-out measurement for adjusting and confirming the overall posture of the shaft after connecting the devices are continuously executed. The amount of shaft runout is calculated and displayed as the movement adjustment amount of the reference member, and the measurement process related to shaft runout adjustment is automated. As a result, conventional measurement results such as improvement in measurement accuracy, reduction in measurement time, and immediate examination of the installation state can be greatly improved.

Japanese Unexamined Patent Publication No. 7-23548 (pages 3 and 6, FIG. 1) Japanese Patent Laid-Open No. 8-340662 (pages 3, 4 and 6; FIG. 1) Japanese Patent Laid-Open No. 10-47945 (pages 4 and 8, FIG. 1) JP-A-7-83784 (2nd and 6th pages, FIG. 1)

  However, according to the various measurement (measurement) apparatuses and measurement (measurement) methods related to centering according to the conventional example, the axis alignment is performed based on the piano wire suspended from the upper part. Therefore, in order to suppress the swing of the piano wire, it is necessary to take a windproof process such as preventing wind blown from the suction pipe, inlet valve, pressure suppressor, water discharge pipe, etc. of the turbine as well as the windproof of the building. Further, in the alignment of the piano wire, a static time is required every time the position of the piano wire is shifted, and it takes time to set the position of the axis.

  Accordingly, the present invention has been created in view of the above-mentioned problems, and it is possible to easily and quickly align the shaft, and to align the alignment assisting device and the alignment method so that the windproof process performed before the alignment can be omitted. The purpose is to provide.

  The axial alignment assisting device according to the present invention includes first and second objects temporarily installed such that each has a circular opening and the axial centers of the openings are on substantially the same straight line. In the axis alignment assisting device that detects the shift amount and the shift direction of the axial center position, a light beam along the axial center of the opening of the first object is emitted from one end of the opening of the first object. A light emitting means for irradiating the opening of the second object, and an inner surface of the opening of the second object, arranged in contact with two joints at one end, and an axis of the opening of the second object In the periphery of the heart, the other end receives a light beam, and outputs a position information of the received light beam, and a position information output by the light receiving means, and the openings of the first and second objects. And an information processing means for detecting a shift amount and a shift direction of the axial position of the shaft. It is.

  According to the axis alignment assist device of the present invention, the light emitting means irradiates the light beam along the axis of the opening of the first object toward the opening of the second object, and the light receiving means includes the second light receiving means. Arranged on the inner surface of the opening of the object and receiving the light beam, and outputting position information of the received light beam, the information processing means inputs the output position information, and the first and second A displacement amount and a displacement direction of the axial position of the opening of the object are detected.

  Therefore, referring to the displacement amount and the displacement direction, adjusting the position of the second object relative to the first object or the position of the first object relative to the second object so that the displacement amount becomes zero. Therefore, the axis can be easily and quickly aligned. Further, since the position of the axis can be determined without using the piano wire, it is possible to omit the windproof process performed before the axis alignment.

  In the axial alignment method according to the present invention, the shafts of the first and second objects temporarily installed so that each has a circular opening and the axial centers of the openings are on substantially the same straight line. A method of detecting a shift amount and a shift direction of a center position and axially aligning an opening portion of the first object and an opening portion of the second object, wherein one end of the opening portion of the first object Irradiating a light beam along the axial center of the opening of the first object from the section toward the opening of the second object, and two inner ends of the opening of the second object. A step of adjusting a light receiving position of a light receiving unit having a predetermined shape arranged so as to contact a contact; a step of receiving a light beam at the other end of the light receiving unit around the axis of the opening of the second object; A step of outputting positional information of the received light beam, and inputting the output positional information to open the openings of the first and second objects The position of the second object relative to the first object is determined with reference to the step of detecting the shift amount and the shift direction of the axial center position, and the detected shift amount and shift direction, so that the shift amount becomes zero. Or a step of adjusting the position of the first object with respect to the second object.

  According to the axis alignment method according to the present invention, the amount of misalignment between the axial positions of the openings of the first and second objects based on the light beam irradiated along the axial center of the opening of the first object. The position of the second object relative to the first object or the position of the first object relative to the second object is adjusted so that the detected displacement amount becomes zero. .

  Therefore, the axis can be easily and quickly aligned, and the position of the axis can be determined without using the piano wire. Thereby, the wind-proof process performed before axis alignment can be omitted.

  According to the axis alignment auxiliary device according to the present invention, the information is output from the light receiving means arranged at the opening of the second object, and is irradiated along the axis of the opening of the first object. Information processing means for inputting the position information of the light beam is provided, and the shift amount and the shift direction of the axial center positions of the openings of the first and second objects are detected.

  With this configuration, the position of the second object with respect to the first object or the position of the first object with respect to the second object is adjusted so that the amount of deviation is zero with reference to the amount of deviation and the direction of deviation. Therefore, the axis can be easily and quickly aligned. Further, since the position of the axis can be determined without using the piano wire, it is possible to omit the windproof process performed before the axis alignment. Furthermore, since it is possible to measure automatically and accurately without using a precision measuring instrument such as a micrometer, anyone can easily detect the amount and direction of displacement, and variations in detection results by the operator. Can be minimized.

  According to the axis alignment method according to the present invention, the amount of misalignment between the axial positions of the openings of the first and second objects based on the light beam irradiated along the axial center of the opening of the first object. And the displacement direction, and the position of the second object relative to the first object or the first object relative to the second object so that the displacement amount is zero with reference to the detected displacement amount and displacement direction. The position of the object is adjusted.

  With this configuration, the axis can be easily and quickly aligned, and the position of the axis can be determined without using a piano wire. Thereby, the wind-proof process performed before axis alignment can be omitted. Furthermore, since it is possible to measure automatically and accurately without using a precision measuring instrument such as a micrometer, anyone can easily detect the amount and direction of displacement, and variations in detection results by the operator. Can be minimized.

  Subsequently, an axis alignment auxiliary device and an axis alignment method as embodiments according to the present invention will be described with reference to the drawings. FIG. 1 is a schematic diagram showing a configuration example of an axis alignment auxiliary device 100 as an embodiment according to the present invention.

  A shaft alignment assisting device 100 shown in FIG. 1 is, for example, a device that assists the shaft alignment operation of the water turbine 200 and the generator 201 in a hydroelectric power plant. Used for. The hydroelectric power plant is provided with a lower foundation 1 for attaching a water turbine that constitutes an example of a first object. A water turbine 200 having a rotation shaft is attached to the lower foundation 1. The lower foundation 1 is provided with a circular opening 1 a for incorporating the rotating shaft of the water turbine 200. The upper part of the rotating shaft of the water turbine 200 is movably supported by a metal support 4 constituting an example of a second object.

  A generator 201 connected to a water turbine 200 incorporated in the lower foundation 1 has an armature rotating shaft. In this example, the generator 201 is attached to the upper foundation 5 provided integrally with the lower foundation 1. The armature rotation shaft is supported by bearing members such as a lower blanket 6 and an upper bracket 8 that constitute an example of the second object. The metal support 4, the lower blanket 6, the upper bracket 8, and the like described above are each provided with a circular opening for incorporating a rotation shaft.

  The shaft alignment assisting device 100 is configured such that after the overhaul of the water turbine 200 and the generator 201, the shaft centers of the mutual opening portions of the lower foundation 1, the metal support 4, the lower blanket 6, the upper bracket 8, and the like are substantially the same. For example, the displacement amount and the displacement direction of the axial center position between the opening portion 1a of the lower foundation 1 and the opening portion 4a of the metal support 4 that are temporarily installed so as to ride on the line are detected and the movement adjustment amount and the movement direction thereof are detected. Is presented.

  An example of the turbine 200 is a vertical shaft Francis turbine. The water turbine 200 includes a draft 2, a casing 3, a runner 211, a main shaft 210, and a metal support 4, and is installed on the lower foundation 1. The water turbine 200 rotates the runner 211 by the hydraulic force of water flowing from the casing 3 to the draft 2. A main shaft 210 that is a rotating shaft of the water turbine 200 is connected to the upper portion of the runner 211. The main shaft 210 is engaged with the opening 4a of the metal support 4 for bearings and rotates while being supported. Rotational power is transmitted to the generator 201.

  An example of the generator 201 is a vertical-axis ordinary generator. The generator 201 has a stator portion 7 for power generation, a lower blanket 6, an upper blanket 8, and a main shaft 212, and is installed on the upper foundation 5. A main shaft 212 that is an armature rotation shaft of the generator 201 has a lower end connected to an upper end of the main shaft 210 and obtains rotational power from the water turbine 200. The main shaft 212 is engaged with the opening 6a of the lower blanket 6 for bearings and the opening 8a of the upper blanket 8, and rotates while being supported in a vertical state. The generator 201 causes the stator portion 7 to generate electric power when a magnetic pole (not shown) connected to the main shaft 212 rotates.

  Note that the water turbine 200 and the generator 201 shown in FIG. 1 are shown by extracting only basic parts, and are originally configured to have many parts other than the above parts.

  The axis alignment auxiliary device 100 includes a laser irradiation device 10, a light receiver 20, an electric wire 30, and a computer 40. The laser irradiation device 10 constitutes an example of a light emitting unit, and a light beam LB1 along the axis of the opening 1a of the lower base 1 is applied to, for example, the opening 4a of the metal support 4 from one end of the lower base 1. Irradiate toward.

  In this example, the laser irradiation device 10 is installed in the draft 2 located at the lowermost part of the water turbine 200 by being attached to the gantry 101, and irradiates the light beam LB1 in a direction substantially perpendicular to the ground upward from the gantry 101. To do. The irradiated light beam LB1 is received by the light receiver 20.

  The light receiver 20 constitutes an example of a light receiving means. Here, the light receiving unit 20 is arranged in contact with the inner side surface of the opening 4a of the metal support 4 with two joints at one end thereof, and the periphery of the axis of the opening 4a of the metal support 4 The other end receives the light beam LB1 and outputs position information of the received light beam LB1. A computer 40 is connected to the light receiver 20 via an electric wire 30.

  The computer 40 constitutes an example of information processing means, inputs the positional information output from the light receiver 20, and the shift amount of the axial center position between the opening 1 a of the lower foundation 1 and the opening 4 a of the metal support 4. And the direction of misalignment is detected. The computer 40 includes a monitor 41, a keyboard 42, an I / O interface 43, a control device 44, a memory 45, and a RAM 46, and includes basic information stored in the memory 45 and position information input from the light receiver 20. Based on the above, the processing necessary for axis alignment is performed.

  A keyboard 42 is connected to the I / O interface 43 and is operated to input various commands and data. Operation data such as numbers and characters input by operating the keyboard 42 is input to the control device 44 via the I / O interface 43. A monitor 41 is connected to the I / O interface 43. The monitor 41 uses a liquid crystal display panel, a PDP display panel, a CRT, or the like, and displays image data output from the control device 44 via the I / O interface 43.

  The control device 44 appropriately reads out a program and basic information necessary for treatment from the memory 45, expands them in the RAM 46, and executes various processes necessary for axis alignment based on operation data input from the keyboard 42. For example, the computer 40 is temporarily installed and operated on the lower foundation 1 or the upper foundation 5.

  FIG. 2 is a perspective view illustrating a configuration example of the gantry 101. A gantry 101 shown in FIG. 2 constitutes an example of a mounting gantry, supports the laser irradiation device 10 so as to be rotatable, and is used for position adjustment of the laser irradiation device 10. The gantry 101 includes movable stages 110 and 120 and a base stage 130, and the movable stage 110 on the upper surface is disposed at a predetermined place, here, the draft 2 so as to be substantially horizontal to the ground.

  The base stage 130 includes a rail 132, a screw receiver 133, and an adjustment foot 134, and is disposed at the lowermost part of the gantry 101. The basic stage 130 has a square upper surface made of, for example, a metal plate having a predetermined thickness. Four screw holes are opened on the bottom surface of the base stage 130, and the screw part 134b of the adjustment foot part 134 is engaged with the screw hole.

  The adjustment foot portion 134 has a threaded portion 134b at one end portion and a rubber circular body 134a at the other end portion, and is used for horizontal adjustment of the gantry 101. The adjustment foot part 134 adjusts the length of the screw part 134b by rotating the circular body 134a. Two rails 132 are arranged in parallel on the upper surface of the basic stage 130.

  The rail 132 is formed into a quadrangular prism by using a metal such as steel, for example, and a guide convex portion 132a is protruded and formed on one side surface in the longitudinal direction. For example, a screw receiver 133 is welded to one end portion in the longitudinal direction of the two rails 132 so as to straddle both.

  The screw receiver 133 is configured to have, for example, steel, a cylindrical portion having a female screw portion 133a opened at the center portion of the main body of the quadrangular prism, and the adjustment screw 121 of the movable stage 120 is attached to the female screw portion 133a. It is made to fit. The hole 124 of the movable stage 120 is engaged from the other end of the rail 132 to which the screw receiver 133 is not connected.

  The movable stage 120 constitutes an example of a movable table, and is movable on the basic stage 130 in the direction of the arrow line Y1. The movable stage 120 includes, for example, an adjustment screw 121, a rail 122, a protruding portion 122a, a screw receiver 123, and a hole portion 124, and is installed on the basic stage 130. The movable stage 120 is formed to have a square shape smaller than that of the basic stage 130, for example, by a metal plate having a predetermined thickness. Two holes 124 are opened in parallel on the bottom surface of the movable stage 120. On one inner surface of the hole portion 124, a guide concave portion 124a is cut and formed into a shape that can be engaged with the convex portion 132a of the rail 132. A screw hole 120a is opened on one side surface of the movable stage 120, and an adjustment screw 121 fitted to the female screw portion 133a is connected to the screw hole 120a. The adjusting screw 121 has a predetermined diameter and length, and is used for adjusting the position of the movable stage 120 in the arrow line Y1 direction.

  On the other hand, a protruding portion 122a for the rail 122 is formed on two opposite side surfaces of the movable stage 120 that are perpendicular to the surface on which the screw hole 120a is opened, and an L-type is formed on the upper surface of the protruding portion 122a. Two rails 122 are arranged in parallel. The rail 122 is made of steel, for example, and is arranged in a direction perpendicular to the adjustment screw 121 and the hole 124. For example, a screw receiver 123 is welded to end portions of the two rails 122 in the longitudinal direction so as to extend over both ends. The hole 114 of the movable stage 110 is engaged from the other end of the rail 122 to which the screw receiver 123 is not connected.

  The movable stage 110 constitutes an example of a movable table, and is movable in the arrow line X1 direction. The movable stage 110 has an adjustment screw 111, a hole 114, and a precision level 140, and is installed on the movable stage 120. The movable stage 110 is formed by, for example, a metal plate having a predetermined thickness so that the upper surface has a square shape smaller than that of the movable stage 120. Two holes 114 are opened in parallel on the bottom surface of the movable stage 110. On one inner surface of the hole portion 114, a convex portion 114a for guide is formed so as to be able to be fitted to the rail 122. A screw hole 110a is opened on one side surface of the movable stage 110, and an adjustment screw 111 is fitted into the female screw portion 123a in the screw hole 110a to be connected to an end portion. The adjustment screw 111 is a screw having a predetermined diameter and length, and is used for position adjustment of the movable stage 110 in the direction of the arrow line X1. The gantry 101 is configured as described above.

  In this example, the movable stages 110 and 120 of the gantry 101 are provided with a lock mechanism for fixing the engaged state. This locking mechanism is configured to include screw receivers 150 and 160 and locking screws 151 and 161.

  The locking screw 161 is disposed so that the end thereof is in contact with the side surface facing the side surface to which the adjustment screw 121 of the movable stage 120 is coupled, and locks the movement of the movable stage 120 in the Y1 direction. The lock screw 161 is fitted into the screw receiver 160 and is kept in a state so that the adjustment screw 121 and the shaft portion face each other. The screw receiver 160 is connected to the end of the rail 132.

  Similarly, the locking screw 151 is disposed so that the end thereof is in contact with the side surface facing the side surface to which the adjustment screw 111 of the movable stage 110 is connected, and locks the movement of the movable stage 110 in the X1 direction. The lock screw 151 is fitted into the screw receiver 150 and is held in a state so that the adjustment screw 111 and the shaft portion face each other. The screw receiver 150 is connected to the end of the rail 122.

  A precision level 140 that constitutes an example of a level is installed on the upper surface of the movable stage 110 of the gantry 101. In this example, two precision levels 140 are arranged so as to be perpendicular to each other, and detect the inclination of the movable stage 110 with respect to the horizontal.

  Furthermore, in this example, holes 110b, 120b, and 130b that communicate with each other are opened at the center of the movable stages 110 and 120 and the base stage 130, and the laser irradiation device 10 is provided in the holes 110b, 120b, and 130b. To be engaged.

  In this example, the base stage 130 has a quadrangular shape and the four adjustment feet 134 are connected to the lower surface of the base stage 130. However, the present invention is not limited to this, and the base stage 130 has a circular shape, for example. Three adjustment legs 134 may be coupled to the lower surface. By doing in this way, the adjustment foot | leg part 134 can share a load load equally, while being able to install the base 101 stably, the horizontal adjustment of the base 101 becomes easy.

  FIG. 3 is a schematic cross-sectional view showing a configuration example of the laser irradiation apparatus 10. A laser irradiation apparatus 10 shown in FIG. 3 includes a sphere 10a, a laser irradiator 10c, and a cylindrical weight 10d. The spherical body portion 10a is formed in a substantially spherical shape using steel, brass, or the like. One end of the cylindrical portion 10a1 is connected to one surface of the spherical portion 10a, here the upper surface, for example, by welding. Cylindrical part 10a1 is comprised by steel, brass, etc. by the cylindrical shape which has a circular shaped opening part, and the internal thread of the opening part is cut off by the internal thread.

  A cylindrical hole 10a2 is formed in a circular shape on the other surface of the spherical portion 10a, here the lower surface. The cylindrical hole 10a2 is also internally threaded on the inner surface. Here, the circular openings of the cylindrical portion 10a1 and the cylindrical hole portion 10a2 have a linear axis passing through the center of the spherical body portion 10a, are opened to the same diameter, and are cut with a female screw having the same pitch. Yes. A cylindrical weight portion 10d constituting an example of a weight portion is engaged with the cylindrical hole portion 10a2, and gravity is applied to the spherical body portion 10a.

  The cylindrical weight portion 10d has a cylindrical portion 10d3 made of steel, brass or the like. The cylindrical portion 10d3 has a circular opening, and a screw portion 10d2 that can be fitted into the cylindrical portion 10a1 or the cylindrical hole portion 10a2 on the outer surface of one end portion. Further, a donut-shaped weight portion 10d1 made of, for example, lead alloy is connected to the other end portion of the cylindrical portion 10d3 with a predetermined weight.

  Further, a hole 10a3 is opened concentrically with the cylindrical portion 10a1 inside the cylindrical portion 10a1 on the upper surface of the spherical portion 10a. Here, a female screw having a precise pitch is cut on the inner surface of the hole 10a3, and a laser irradiator 10c constituting an example of a light emitting unit is engaged therewith. The laser irradiator 10c is configured such that the light source of the light beam LB1 is housed in, for example, a cylindrical container having a screw groove with a precision pitch that can be fitted to the hole 10a3 on the outer surface. In this way, the laser irradiation apparatus 10 is configured.

  On the other hand, a bearing 170 constituting an example of a support part is installed in the hole part 110b of the gantry 101, and supports the laser irradiation apparatus 10 so as to be rotatable. The bearing 170 includes a rolling bearing 170b and balls 170a.

  The rolling bearing 170b constitutes an example of a ball bearing, and a groove 170b1 whose upper surface is opened at a circumferential portion is opened, and a hole portion 170c is penetrated at a central portion. In this example, eight balls 170a constituting an example of a sphere are rotatably engaged with the groove 170b1.

  Here, the laser irradiation device 10 is supported by the bearing 170 with the cylindrical weight portion 10d facing downward, the spherical side surface of the spherical portion 10a in contact with the spherical side surface of the ball 170a. Thereby, since the posture of the laser irradiation apparatus 10 is maintained in a state where the cylindrical weight portion 10d is vertical, the laser irradiator 10c can easily irradiate the light beam LB1 in the direction opposite to gravity vertically.

  Further, as in this example, when it is desired to irradiate the light beam LB1 upward, the screw portion 10d2 of the cylindrical weight portion 10d is fitted into the cylindrical hole portion 10a2, but when the light beam LB1 is desired to be irradiated downward. The screw part 10d2 is fitted into the cylindrical part 10a1. Thereby, the laser irradiator 10c is held in a state of being directed downward, and the light beam LB1 can be irradiated in the direction of gravity (see FIG. 12).

  Furthermore, the hole 120b of the gantry 101 on which the laser irradiation apparatus 10 is installed takes into consideration the movable region of the movable stage 110, and has the same diameter as the minimum opening of the hole 110b, in this example, the hole 170c. The opening is larger than the opening. The hole 130b is opened larger than the hole 120b in consideration of the movable region of the movable stage 120. By doing in this way, when adjusting the position of the laser irradiation apparatus 10, the communicating path for penetrating the cylindrical part 10d3 of the cylindrical weight part 10d is ensured.

  FIG. 4 is a perspective view showing an assembly example of the laser irradiation apparatus 10. When the laser irradiation apparatus 10 shown in FIG. 4 is assembled, first, the laser irradiator 10c is manufactured. In order to manufacture the laser irradiator 10c, first, for example, a battery-driven laser diode is prepared. Next, the prepared laser diode is placed in a cylindrical container having a thread groove with a precision pitch on the side surface. At this time, attention should be paid so that the axis of the cylindrical container and the light beam LB1 irradiated by the laser diode are in a straight line.

  Next, the sphere part 10a is manufactured. In order to manufacture the spherical body portion 10a, first, a spherical body of an appropriate size such as brass is prepared. When the sphere is prepared, the cylindrical hole 10a2 is opened on one surface, here, the lower surface, and a screw groove is cut on the inner surface. Further, a hole 10a3 is opened on the other surface, here the upper surface, and a thread groove with a precise pitch for fitting the laser irradiator 10c is cut. At this time, the hole 10a3 is opened concentrically with the cylindrical hole 10a2. Alternatively, the hole 10a3 may be opened larger and an existing precision pitch female screw may be welded.

  Next, the cylindrical portion 10a1 is manufactured. In order to manufacture the cylindrical portion 10a1, first, for example, a cylindrical member of brass having an opening having the same diameter as the above-described cylindrical hole portion 10a2 is prepared. When the cylindrical member is prepared, it is cut out to an appropriate length and a screw groove is cut on the inner surface of the opening. Here, the pitch of the above-described cylindrical hole 10a2 and the thread groove is matched. If cylindrical part 10a1 can be manufactured, it will connect with spherical body part 10a by welding, for example so that it may become concentric form with hole part 10a3.

  Next, the bearing 170 is prepared. Here, eight balls 170a having a predetermined diameter and a rolling bearing 170b having an endless groove 170b1 that can be engaged with the balls 170a are prepared. These may be prepared by opening the upper surface of a rolling bearing of a ready-made bearing and further cutting the hole 170c.

  Next, the cylindrical weight portion 10d is manufactured. In order to manufacture the cylindrical weight portion 10d, for example, a brass cylindrical member having a diameter that can be fitted into the cylindrical hole portion 10a2 is prepared. When the cylindrical member is ready, cut it out to an appropriate length, and cut a screw groove on the outer surface of one end. Further, for example, a donut-shaped weight portion 10d1 made of a lead alloy is prepared, and connected to the other end portion by welding, for example.

  When the above members are prepared, first, the laser irradiator 10c is fitted into the hole 10a3. At this time, for example, a groove 10c1 may be formed on the upper surface of the laser irradiator 10c, and the laser irradiator 10c may be rotated using a fitting or the like that can be fitted into the groove 10c1. Next, the spherical body portion 10a is placed on the bearing 170, the cylindrical weight portion 10d is passed through the holes 130b, 120b, and 110b from below, and the screw portion 10d2 is fitted into the cylindrical hole portion 10a2 to be connected. Thus, the laser irradiation apparatus 10 can be assembled.

  FIG. 5 is a perspective view illustrating a configuration example of the light receiver 20. The light receiver 20 shown in FIG. 5 includes a main body 21, a cylindrical part 22 and a CCD 23, an output part 24, and a reverse installation pointer 25. The main body 21 constitutes an example of a plate-shaped main body portion and has a predetermined length. The main body 21 is configured in a rectangular parallelepiped shape in this example by a plastic plate having a thickness that does not allow the surface to bend.

  A CCD 23 is installed at one end of the main body 21. The CCD 23 constitutes an example of a light receiving plate, receives the light beam LB1, and outputs position information of the received light. An output unit 24 is connected to the CCD 23. The output unit 24 has a function of converting / modulating data output from the CCD 23 into a signal that can be transmitted to the computer 40. An electric wire 30 is connected to the subsequent stage of the output unit 24.

  On the other hand, two cylindrical portions 22 are connected to the other end portion of the main body 21 in this example. The cylindrical portion 22 constitutes an example of the first and second circular members, and in this example, one curved side surface is provided on each inner side surface of the opening of the second object, such as the metal support 4. They are arranged so as to be in contact with each other and are in contact with each other at two joints.

  A reversal installation pointer 25 is installed between the CCD 23 and the cylindrical portion 22 in the middle of the main body 21. The reverse installation pointer 25 has a laser irradiator 25a on one side surface and a laser irradiator 25b on the other side surface, and extends from the laser irradiators 25a and 25b to the longitudinal center line (axial center) of the main body 21. Irradiate the light beams LB2 and LB3. The light beams LB2 and LB3 are irradiated in a straight line in opposite directions, and are used for marking the installation position before inversion, which is performed to invert and install the main body 21. For example, a battery-driven laser diode is used for the laser irradiator 25a and the laser irradiator 25b. The light receiver 20 is configured as described above.

  In this example, the cylindrical portion 22 has a general cylindrical shape, and the cylindrical portion 22 is in contact with the inner surface of the opening of the second object in a straight line. However, the present invention is not limited to this, and the cylindrical portion 22 is not limited thereto. The intermediate portion of the side surface portion that comes into contact with the inner surface of the opening of the second object may protrude in a curved shape, and the cylindrical portion 22 may have a deformed cylindrical shape. By doing so, the cylindrical portion 22 comes into contact with the inner surface of the opening of the second object at a point, so that the installation of the light receiver 20 is facilitated.

  Furthermore, in this example, the reversal installation pointer 25 is installed in the middle part of the main body 21, but the present invention is not limited to this, and the laser irradiators 25a and 25b are separated so that the longitudinal direction of the main body 21 is increased. You may make it each install in the side surface of both ends, for example. Below, the assembly (manufacture) method of the optical receiver 20 is demonstrated.

  FIG. 6 is a perspective view showing an assembly example of the light receiver 20. When the light receiver 20 shown in FIG. 6 is assembled, first, the main body 21 is manufactured. To manufacture the main body 21, a plate member having a sufficient thickness such as plastic or ceramic is prepared, and a rectangular member having a predetermined size is cut out. The length l1 in the longitudinal direction at this time is longer than the radius R of all the bearing members installed and smaller than the diameter 2R (see FIG. 7). The width w <b> 1 in the short direction is set to a width that can maintain the strength of the main body 21.

  Next, two cylindrical portions 22 are manufactured. In order to manufacture the cylindrical portion 22, first, a cylindrical member having a predetermined shape formed of plastic, ceramic, or the like is prepared. The radius of the cylindrical member is set to be equal to or less than half of the width w1 of the main body 21. Further, the height of the cylindrical member is set to a sufficient height so that the cylindrical portion 22 can stably contact the side surface of the bearing member. When a cylindrical member having a predetermined shape is prepared, a fan-shaped hole 22a having a central angle of 90 ° is opened on the side surface. At this time, it is preferable that the apex of the fan-shaped hole 22 a coincides with the center of the cylindrical portion 22. If two cylindrical parts 22 can be manufactured, the hole 22a is fitted and bonded to two corners of one end part in the longitudinal direction of the main body 21, respectively.

  Next, the CCD 23 is prepared. As the CCD 23, a sheet-shaped CCD having an appropriate size is used in consideration of the radius R of the openings of all the bearing members on which the light receiver 20 is installed. Further, an output unit 24 is connected to the output stage of the CCD 23, and an electric wire 30 is further connected to the output unit 24. When the CCD 23 is ready, it is attached to the other end of the main body 21. At this time, the CCD 23 is arranged at an appropriate position so that the CCD 23 can receive the light beam LB1 in any of the bearing members on which the light receiver 20 is arranged.

  Next, the reverse installation pointer 25 is manufactured. In order to manufacture the inverted installation pointer 25, first, a rectangular parallelepiped container member formed of plastic, ceramic, or the like, for example, one of which is opened is prepared. When a predetermined container member is prepared, holes are opened on two opposite side surfaces, and laser irradiators 25a and 25b are installed in the container so that the light beams LB2 and LB3 can be irradiated from the holes. It is also preferable to store a battery that serves as a power source for the laser irradiators 25a and 25b in the container. When the reverse installation pointer 25 is prepared, the container member is bonded to the main body 21 with the opened surface of the container member facing the main body 21. At this time, care is taken that the light beams LB2 and LB3 coincide with the axis of the main body 21. In this manner, the light receiver 20 can be assembled.

  In this example, the CCD 23 and the computer 40 are connected to be communicable via the electric wire 30. However, the present invention is not limited to this, and a communication device such as a mobile phone is connected to the output unit 24. The wireless communication with the computer 40 may be possible. By doing in this way, the light receiver 20 can be arrange | positioned without minding the length etc. of the electric wire 30 now. Hereinafter, an axis alignment method performed by the axis alignment auxiliary device 100 will be described. First, the function of the light receiver 20 will be described.

  FIG. 7 is a diagram illustrating a function example (No. 1) of the light receiver 20. The light receiver 20 shown in FIG. 7 is disposed on the inner surface of the opening 4a of the metal support 4 so that the side surface of the cylindrical portion 22 is in contact with the point P4 and the point P5, and the light beam LB1 emitted from the laser irradiation device 10 is turned on. Light is received at PB1. FIG. 7 shows the lower surface on the light receiving surface side.

  The position information of the point PB 1 received and output by the CCD 23 is input to the computer 40 via the output unit 24 and the electric wire 30. The control device 44 of the computer 40 executes the following processing based on the input position information of the point PB1 and the basic information input in advance and stored in the memory 45. Here, it is assumed that the position information of the point P1 (x1, y1), the allowable value dm of the deviation amount, and the like are stored in the memory 45 in advance as basic information.

  Further, the metal support 4 whose position is adjusted is engaged with the lower foundation 1 in this state in a state where the bolt for joining is loosened. Therefore, it is possible to adjust a delicate position in the X direction and the Y direction in the axis alignment process. The position after the axis alignment process can be marked by a positioning fitting called a knock. Therefore, when the metal support 4 is disassembled after the shaft alignment process and reassembled with the rotating shaft engaged, the metal support 4 can be installed at the aligned position.

  It is assumed that the light receiver 20 is held by the placement operator in a state where the light beams LB2 and LB3 are emitted from the reversal installation pointer 25. On the other hand, the computer 40 is operated while displaying information to the adjustment operator of the joining bolt, and the adjustment operator sends a predetermined instruction verbally or wirelessly to the arrangement operator as necessary.

  The following axis alignment process includes an inclination detection process for detecting whether or not the light receiver 20 is arranged at right angles to the opening 4a, and a shift amount detection for detecting a shift amount of the axial center position of the opening 4a. Process. Therefore, the following description will be divided into two steps.

[Inclination detection process]
In the tilt detection step, the control device 44 first reads basic information from the memory 45 and sets a point P1 as a reference point. Here, it is assumed that the point P1 is set at an arbitrary position on the axis of the main body 21 in advance. Next, the control device 44 reads the position information of the light receiving point of the light beam LB1, the point PB1 (xB1, yB1) from the light receiver 20, sets the vector V1 from the point P1 to the point PB1, and sets the length of the vector V1. It is displayed on the monitor 41 together with the values of the length | V1 |, the length | V1x | of the X component vector V1x of the vector V1, and the length | V1y | of the Y component vector V1y. However, since the computer 40 is usually disposed near the adjustment worker, the placement worker cannot see the monitor 41. Therefore, as necessary, the adjustment worker sends a predetermined instruction to the placement worker verbally or wirelessly. The placement operator refers to the predetermined instruction and adjusts the inclination of the light receiver 20 in the X direction so that the length | V1x | becomes the minimum value, so that the length | V1y | becomes the minimum value. Then, the inclination of the light receiver 20 in the Y direction is adjusted. The installation state in which the length | V1 | is the minimum value is the state in which the light receiver 20 is installed perpendicular to the light beam LB1.

  Here, it is preferable that the computer 40 emits a notification sound so that the arrangement worker can be notified of the tilted state of the light receiver 20. For example, the computer 40 emits a beep sound having a long silence interval when the length | V1 | is long, and emits a beep sound having a short silence interval when the length | V1 | is short. To emit. By doing so, the information of the length | V1 | can be fed back to the placement worker, so that the placement worker can execute the inclination detection step alone.

  Furthermore, a monitor device connected to the electric wire 30 may be arranged near the placement worker so that the placement worker can work with reference to the display of the monitor device. In this way, more detailed information of the length | V1 | can be fed back to the placement operator. By executing the tilt detection process in this way, the light receiver 20 is disposed perpendicular to the opening 4a.

[Deviation detection process]
When the above-described tilt detection process is completed, the control device 44 reads the position information of the point PB1 from the light receiver 20 again according to, for example, a command input by the adjustment operator. The control device 44 newly sets the vector V1, the X component vector V1x, and the Y component vector V1y again based on the read information and the position information of the point PB1, and stores them in the memory 45 or the like.

  Further, when the control device 44 reads the vector V1, the placement worker or the auxiliary worker, the irradiation position of the light beam LB2 and the light beam LB3 irradiated to the opening 4a, the point P2 (x2, y2), and the point P3 Mark (x3, y3). This mark may be marked with a pen or the like, or may be marked with a seal having an acute angle portion, for example. If the opening 4a is made of a material having magnetism, a mark may be provided by temporarily attaching a magnet.

  FIG. 8 is a diagram illustrating a function example (No. 2) of the light receiver 20. The photoreceiver 20 shown in FIG. 8 is rotated by 180 ° from the state shown in FIG. 7 based on the previous mark, and the cylindrical portion 22 is in contact with the opening 4a. That is, the irradiation position point P2 ′ (x2 ′, y2 ′) of the light beam LB2 matches the previous point P3, and the irradiation position point P3 ′ (x3 ′, y3 ′) of the light beam LB3 matches the previous point P2. Are arranged to be. Therefore, the photoreceiver 20 in FIG. 8 is disposed horizontally on the same axis as in the state of FIG.

  In this state, the control device 44 reads the position information of the point PB1 again from the light receiver 20 in accordance with, for example, a command input by the adjustment operator. The control device 44 sets the vector V2, the X component vector V2x, and the Y component vector V2y from the point P1 to the point PB1 in the inverted state, and stores them in the memory 45 or the like.

The control device 44 compares the vectors V1 and V2, and calculates the distance d1 (dx1, dy1) between the center point P0 and the point PB1 using the following equations 1 to 3.
dx1 = | V1x | = | V2x |
dy1 = || V1y | − | V2y || / 2 Equation 2
d1 = √ (dx12 + dy12) Equation 3
The control device 44 displays the calculation result on the display monitor 41 by an appropriate method.
The adjustment operator finely adjusts the joining position of the metal support 4 with reference to the distance d1 (dx1, dy1). By executing the deviation amount detection step in this manner, the axial center positions of the opening 4a of the metal support 4 and the opening 1a of the lower foundation 1 are matched.

  9A and 9B are diagrams showing a function example (No. 3) of the light receiver 20. In this example, the photoreceiver 20 shown in FIG. 9A is initially arranged with the longitudinal direction parallel to the NS direction. 9A, after performing the above-described axis alignment process in the arrangement state shown in FIG. 9A, it is rotated 90 °, and the longitudinal direction is arranged parallel to the WE direction as shown in FIG. The process is executed. By doing so, even when the opening 4a is not a perfect circle, the deviation of the axial center position can be minimized.

  FIG. 10 is a flowchart showing an example of axis alignment of the axis alignment auxiliary device 100. According to this axial alignment example, the displacement amount and displacement direction of the axial center positions of the lower foundation 1 and the metal support 4 that are temporarily installed so that the axial centers of the openings are on substantially the same straight line are detected. Thus, the opening 1a of the lower base 1 and the opening 4a of the metal support 4 are aligned with each other. When the metal support 4 is aligned in the following procedure, the lower blanket 6 and the upper blanket 8 are aligned in the same procedure.

  Under these processing conditions, in step A1 shown in FIG. 10, the light beam LB1 along the axis of the lower foundation 1 is directed from the draft 2 which is one end of the lower foundation 1 toward the opening 4a of the metal support 4. Irradiate. In this example, the light beam LB1 directed upward is irradiated from the laser irradiation device 10 of the gantry 101 disposed in the draft 2. Accordingly, the position of the light beam LB1 is adjusted using the adjustment mechanism of the gantry 101. First, the upper surface of the movable stage 110 is adjusted to be horizontal by rotating the circular body 134a of the adjustment foot 134 with reference to the precision level 140. Next, the adjustment screws 111 and 121 are adjusted to adjust the XY direction of the light beam LB1 so that the light beam LB1 is applied to the center of the opening 1a of the lower base 1. Further, at this time, for example, a light receiving plate or a light receiver 20 showing the center is arranged on the upper blanket 8 temporarily installed on the upper base 5 fixed to the lower base 1, and the light beam is used as a mark. It is preferable to adjust the position of LB1 in the XY directions.

In step A <b> 2, the control device 44 reads basic information from the memory 45. The control device 44 reads position information of the preset point P1 (x1, y1), the allowable value dm of the deviation amount, and the like from the basic information stored in advance in the memory 45.
In step A3, the control device 44 sets a point P1 (x1, y1) as a reference point based on the read information. The control device 44 performs subsequent processing using the point P1 on the axis of the main body 21 as a reference point.

In step A4, the light receiver 20 is installed in the opening 4a. Here, for example, the placement operator places the light receiver 20 so that the two contacts at one end are in contact with the inner surface of the opening 4 a of the metal support 4.
In step A5, inclination detection is executed. In this inclination detection, the control device 44 executes predetermined detection processing according to the above-described procedure of the inclination detection process to display or notify information, and the placement worker receives light from the opening 4a based on the information. The angle of the container 20 is adjusted (see FIG. 11).

  In step A6, the control device 44 reads the position information of the point PB1 according to a predetermined command. The CCD 23 of the light receiver 20 outputs position information of the light receiving point PB 1 to the computer 40 via the output unit 24 and the electric wire 30. The control device 44 of the computer 40 sets the coordinates of the point read from the CCD 23 as a point PB1 (xB1, yB1).

In step A7, the control device 44 sets a vector V1 from the point P1 to the point PB1. Here, the control device 44 stores the vector V1 in, for example, the memory 45 (see FIG. 7).
In step A8, the irradiation positions, points P2 and P3, of the light beams LB2 and LB3 irradiated by the reversal installation pointer 25 to the opening 4a are marked (see FIG. 7). Here, for example, an auxiliary worker who assists the placement worker marks the inner surface of the opening 4a with a pen or the like.

In step A9, the light receiver 20 is rotated 180 ° and installed in the opening 4a. At this time, for example, the placement operator reverses the light receiver 20, the point P2 marked on the inner surface of the opening 4a in the previous step A8 matches the irradiation position of the light beam LB3, and further, the point P3, The position of the light receiver 20 is adjusted so that the irradiation position of the light beam LB2 matches.
In step A10, the control device 44 reads the position information of the point PB1 again according to a predetermined command. Here, the control device 44 sets the coordinates of the point read in accordance with step A6 as a point PB1 (xB1, yB1).

In step A11, the control device 44 sets a vector V2 from the point P1 to the point PB1. Here, the control device 44 of the computer 40 stores the vector V2 in, for example, the memory 45 (see FIG. 8).
In step A12, the control device 44 calculates a deviation amount based on the vectors V1 and V2. The control device 44 calculates and displays the distance d1 (dx1, dy1) between the point P0 and the point PB1 by the above-described Expressions 1 to 3.

In step A13, the control device 44 determines whether or not the coordinates of the point P0 and the point PB1 are the same. Here, the control device 44 compares the distance d1 between the point P0 and the point PB1 calculated in step A12 with the allowable value dm of the deviation amount. As a result of the comparison, if the distance d1 is smaller than the allowable value dm, the process ends. If the distance d1 is larger than the allowable value dm, the process proceeds to Step A14.
When the process proceeds to step A14, the position of the metal support 4 is adjusted based on the calculation result of step A12. Here, the adjustment operator finely adjusts the position of the metal support 4 with reference to the distance d1 and the like. When the adjustment is made, the process returns to step A4 again and the same processing is executed. Thereafter, the processes in steps A4 to A13 are repeated until it is determined in step A13 that the distance d1 is equal to or less than the allowable value dm. In this way, the axis alignment process is executed.

  Further, when the axis alignment by the light receiver 20 installed as shown in FIG. 9A in the predetermined direction is executed as in steps A1 to A14 described above, it is rotated by approximately 90 ° as shown in FIG. ~ A14 may be executed. By doing in this way, since the distance from the inner surface of the opening 4a to the light beam LB1 can be made equal in all directions, the axis can be accurately aligned.

  FIG. 11 is a flowchart showing an example of inclination detection of the axis alignment auxiliary device 100. In step A5 of the above-described example of alignment, the control device 44 executes the tilt detection process as follows. For example, the control device 44 reads basic information from the memory 45 in step B1 of the flowchart shown in FIG. The control device 44 reads position information and the like of the point P1 (x1, y1) from the basic information stored in advance in the memory 45.

In step B2, the control device 44 sets a reference point P1 (x1, y1) based on the read information.
In step B3, the control device 44 reads the coordinates of the point PB1 at which the light beam LB1 is received from the light receiver 20. The control device 44 sets the coordinates of the read point as a point PB1 (xB1, yB1).
In step B4, the control device 44 sets the vector V1 from the point P1 to the point PB1, sets the length | V1 | of the vector V1, the length | V1x | of the X component vector V1x of the vector V1, and the length of the Y component vector V1y. | V1y | is displayed on the monitor 41.

  In step B5, according to the display on the monitor 41, the inclination of the light receiver 20 is corrected by, for example, an arrangement worker. At this time, if the placement worker cannot see the monitor 41, the adjustment worker gives an instruction based on the display on the monitor 41. The placement operator refers to the instruction, adjusts the inclination of the light receiver 20 in the X direction so that the length | V1x | becomes the minimum value, and receives the light so that the length | V1y | becomes the minimum value. The inclination of the container 20 in the Y direction is adjusted. Here, it is more preferable that the computer 40 can feed back information to the placement worker by the notification sound, the monitor device or the like as described above.

  Until an end command is input in step B6, the control device 44 automatically repeats the processes in steps B3 to B5. The repetition execution pitch may be set to about 0.5 seconds to 1 second. Further, while the processes from step B4 to B6 are repeatedly executed, the transition of the length | V1 | set at step B4 may be displayed as a graph with the time axis as the horizontal axis. Furthermore, the minimum value of the length | V1 | may be automatically recorded and displayed.

  As described above, the tilt detection process is executed. As described above, the axis alignment process between the lower foundation 1 and the metal support 4 is executed. Thereafter, the lower blanket 6 and the upper blanket 8 are aligned in the same procedure, and the shafts of all the bearing members are aligned with the axial center position of the lower foundation 1.

  Thus, according to the axis alignment auxiliary device 100 and the axis alignment method according to the present invention, the laser irradiation apparatus 10 transmits the light beam LB1 along the axis of the opening 1a of the lower base 1 to the opening of the bearing member. The light receiver 20 is disposed on the inner side surface of the opening of the bearing member and receives the light beam LB1 and outputs position information of the received light beam LB1, and the computer 40 outputs The detected positional information is input, and the amount of displacement and the direction of displacement of the axial center positions of the lower foundation 1 and the opening of the bearing member are detected. Accordingly, the position of the bearing member with respect to the lower foundation 1 can be moved so that the amount of deviation becomes zero with reference to the amount of deviation and the direction of deviation, so that the axis can be easily and quickly aligned. it can.

  Moreover, since the position of an axial center can be determined without using a piano wire, the wind-proof process performed before an axis alignment can be simplified or abbreviate | omitted. Furthermore, since it is possible to measure automatically and accurately without using a precision measuring instrument such as a micrometer, anyone can easily detect the amount and direction of displacement, and variations in detection results by the operator. Can be minimized.

  Here, the frame 101 is installed on the lowermost draft 2 of the lower foundation 1 which is a stable foundation, and the light beam LB1 is irradiated from the lower side to the upper side. However, the present invention is not limited to this. The frame 101 may be attached to a conventional piano wire installation frame installed in the opening 8a of the upper blanket 8, and the light beam LB1 may be irradiated from above to below. By doing in this way, even if it is necessary to install a scaffold or the like as a scaffold for the placement worker, for example, the light receiver 20 can be comfortably disposed to receive the light beam LB1.

  FIG. 12 is a schematic cross-sectional view showing another configuration example of the laser irradiation apparatus 10. The laser irradiation apparatus 10 shown in FIG. 12 is configured on a bearing 170 with a cylindrical portion 10a1 facing downward, and a cylindrical weight portion 10d is connected to the cylindrical portion 10a1. By doing so, the laser irradiation apparatus 10 is held in a state where the laser irradiator 10c is in the downward direction, so that the light beam LB1 that is substantially perpendicular to the ground from the opening 8a of the upper blanket 8 is gravity-induced. It becomes possible to irradiate in the same direction.

  That is, since the laser irradiation apparatus 10 can irradiate the vertical light beam LB1 in either the upper or lower direction, the laser irradiation apparatus can be applied to either the lowermost member or the uppermost member depending on the installation conditions. 10 can be installed.

  When the irradiation direction of the laser irradiation apparatus 10 is changed from the upper side to the lower side, the cylindrical weight part 10d is removed from the cylindrical hole part 10a2, the spherical part 10a is inverted on the bearing 170, and the cylindrical weight part 10d is changed to the cylindrical part 10a1. May be engaged. Therefore, anyone can easily execute the irradiation direction changing step.

  Furthermore, since the laser irradiation apparatus 10 is merely placed on the bearing 170 and is maintained in its posture by gravity and can irradiate the vertical light beam LB1, anyone can easily attach the gantry 101 and the laser irradiation apparatus 10 to each other. It can be installed and the efficiency of the alignment process can be improved.

  Furthermore, in this example, the computer 40 is used in the inclination detection process of the light receiver 20 disposed in the opening. However, the present invention is not limited to this, and a high accuracy level is provided on the side surface of the light receiver 20 or the like. An arrangement may be provided so that the placement operator can detect the inclination alone. By doing in this way, the light reception position of the light receiver 20 can be adjusted easily.

  In this example, the case where the shaft alignment assist device and the shaft alignment method of the present invention are applied to the shaft alignment of the lower foundation 1 and the bearing member installed in the water turbine 200 and the generator 201 of the hydroelectric power plant will be described. However, the present invention is not limited to this, and each of them has a circular opening and is temporarily installed so that the axial centers of the openings are on substantially the same straight line. It can also be applied to the axial alignment of the opening of the second lens. In this case, the position of the second lens relative to the first lens or the second lens so that the amount of deviation of the axial center positions of the openings of the first and second lenses detected by the computer 40 becomes zero. The position of the first lens relative to the other lens can be adjusted.

  The present invention is extremely suitable when applied to axial alignment of bearing members such as a vertical shaft type water turbine and a vertical shaft type generator.

It is the schematic which shows the structural example of the axis alignment auxiliary | assistance apparatus 100 as embodiment. 3 is a perspective view illustrating a configuration example of a gantry 101. FIG. 1 is a schematic cross-sectional view illustrating a configuration example of a laser irradiation device 10. 1 is a perspective view showing an assembly example of a laser irradiation device 10. FIG. 3 is a perspective view illustrating a configuration example of a light receiver 20. FIG. 3 is a perspective view showing an assembly example of the light receiver 20. FIG. FIG. 3 is a diagram illustrating a function example (part 1) of the light receiver 20; It is a figure which shows the function example (the 2) of the light receiver. It is a figure which shows the function example (the 3) of the light receiver. 5 is a flowchart illustrating an example of axis alignment of the axis alignment auxiliary device 100. 5 is a flowchart showing an example of tilt detection of the axis alignment auxiliary device 100. FIG. 6 is a schematic cross-sectional view showing another configuration example of the laser irradiation apparatus 10.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Lower foundation, 2 ... Draft, 3 ... Casing, 4 ... Metal support, 5 ... Upper foundation, 6 ... Lower blanket, 7 ... Stator part, 8 ··· Upper blanket, 10 ··· Laser irradiation device, 20 ··· Receiver, 21 ··· Main body, 22 ··· Cylindrical portion, 40 · · · Computer, 100 · · · Auxiliary alignment device ..Stage, 140 ... Precision level

Claims (8)

The displacement amount and displacement direction of the axial position of the first and second objects temporarily installed so that each has a circular opening and the axial centers of the openings are on substantially the same straight line. In the axis alignment auxiliary device to detect,
A light emitting means for irradiating a light beam along an axis of the opening of the first object from one end of the opening of the first object toward the opening of the second object;
The inner surface of the opening of the second object is disposed in contact with two joints at one end, the other end receives the light beam around the axis of the opening of the second object, and A light receiving means for outputting positional information of the received light beam;
And an information processing unit that receives the position information output from the light receiving unit and detects a shift amount and a shift direction of the axial positions of the openings of the first and second objects. Axis alignment assist device. The light receiving means is
A plate-shaped main body having a predetermined length;
The axis alignment assisting device according to claim 1, further comprising a light receiving plate that is installed at one end of the main body and receives the light beam. The light receiving means is
The axis alignment assisting device according to claim 2, further comprising first and second circular members connected to the other end of the main body and in contact with an inner surface of the opening of the second object. . The first and second objects are:
Consists of bearings for water turbines and generators,
The axis alignment assisting device according to claim 1, wherein the opening constitutes a bearing of the water turbine and the generator. The light emitting means includes
A movable base movable in the X direction and the Y direction;
The axis alignment assisting device according to claim 1, wherein the axis alignment assisting device is supported by a mounting base having a level for detecting an inclination of the movable base with respect to the horizontal. The mounting base is
A ball bearing having a groove in the circumferential portion and a hole in the central portion;
A support portion provided with a plurality of spheres rotatably engaged with the grooves of the ball bearing;
The light emitting means includes
A substantially spherical sphere,
A weight part attached to one surface of the sphere part and applying gravity to the sphere part;
A light emitting unit that is installed on the other surface of the sphere and irradiates light in a direction opposite to the gravity;
The light emitting means includes
The axis alignment assisting device according to claim 5, wherein the spherical surface of the sphere is in contact with the spherical surface of the sphere of the support and is rotatably supported by the support. The weight portion is
Provided with a circular opening,
The light emitting unit
The axis alignment assisting device according to claim 6, wherein the axis alignment assisting device is disposed on one surface of the spherical body portion located inside the opening and irradiates light in the same direction as the gravity. The displacement amount and displacement direction of the axial position of the first and second objects temporarily installed so that each has a circular opening and the axial centers of the openings are on substantially the same straight line. A method of detecting and axially aligning the opening of the first object and the opening of the second object,
Irradiating a light beam along the axis of the opening of the first object from one end of the opening of the first object toward the opening of the second object;
Adjusting a light receiving position of a light receiving means having a predetermined shape arranged so that two contact points at one end are in contact with the inner surface of the opening of the second object;
Receiving the light beam at the other end of the light receiving means around the axis of the opening of the second object;
Outputting position information of the received light beam;
Inputting the output position information and detecting a shift amount and a shift direction of an axial position of the opening of the first and second objects;
With reference to the detected displacement amount and displacement direction, the position of the second object with respect to the first object or the first object with respect to the second object so that the displacement amount becomes zero. And a step of adjusting the position of the axis.

Images