JP2022070665A - Shaft inclination measurement apparatus - Google Patents

Abstract

To provide a shaft inclination measurement apparatus capable of quickly being moved to any measurement position regardless a length of a shaft and a state of an inner peripheral surface of the shaft.SOLUTION: A shaft inclination measurement apparatus 1 includes: a main frame 3; a support portion 4 that supports the main frame 3; a main frame fixation hydraulic cylinder 5 that presses an inner peripheral surface Wp of a casing W such that the support portion 4 is pressed against the inner peripheral surface Wp of the casing W; and an inclination sensor 6 that measures an inclination angle of the main frame 3. The main frame 3 is moved to a measurement position of the casing W in a state where the main frame fixation hydraulic cylinder 5 does not press the inner peripheral surface Wp of the casing W, and the main frame fixation hydraulic cylinder 5 presses the inner peripheral surface Wp of the casing W at the measurement position so as to fix a position against the inner peripheral surface Wp of the casing W and be along the inner peripheral surface Wp of the casing W.SELECTED DRAWING: Figure 1

Description

The present invention relates to a shaft inclination measuring device.

In the casing method and the like, various shafts are constructed by driving a circular casing with a driving machine and removing the earth and sand in the casing with a club bucket. The casing is driven while connecting a plurality of casings having a predetermined length according to the driving depth. At this time, the casing is placed while checking the tilt angle of the casing so that the tilt angle of the casing is within the allowable range. As for the inclination angle of the casing, a method of measuring the inclination angle of the inner peripheral surface of the casing by using a measuring jig is known. For example, as in Patent Document 1.

The measuring jig (shaft inclination measuring device) described in Patent Document 1 is configured with a rod sufficiently smaller than the total length of the casing as a main frame. A plurality of contact plates projecting in a direction orthogonal to the length direction of the rod are attached to the upper end and the lower end of the rod. Further, a leaf spring is attached to the side surface of the rod on the side opposite to the side to which the contact plate is attached. The upper and lower ends of the leaf spring are fixed to the upper and lower ends of the rod. The leaf spring has a portion that is curved outward so as to come into contact with the inner peripheral surface of the casing. The measuring jig is configured so that the leaf spring presses the inner peripheral surface of the casing so that the contact plate on the opposite side is surely pressed against the inner peripheral surface of the casing. Further, the rod is equipped with two inclinometers for measuring the inclination angle of the rod with respect to the vertical line.

The measuring jig inserted in the hollow portion of the casing presses the inner peripheral surface of the casing radially outward by a leaf spring. In the measuring jig, a plurality of contact plates come into contact with the inner peripheral surface of the casing due to the pressing force of the leaf spring. The measuring jig is moved along the inner peripheral surface of the casing with the contact plate and the leaf spring in contact with the inner peripheral surface of the casing. That is, the measuring jig holds two inclinometers provided on the rod along the inner peripheral surface of the casing. As a result, the measuring jig can measure the tilt angle at any place on the casing. However, in the measuring jig of Patent Document 1, since the leaf spring and the plurality of contact plates move in a state of being in constant contact with the inner peripheral surface of the casing, the unevenness of the inner peripheral surface of the casing and the inner peripheral surface are adhered to the measuring jig. Mud, earth and sand increase the frictional resistance generated between the leaf spring and the plurality of contact plates and the inner peripheral surface of the casing. Therefore, when the contact distance between the contact plate and the leaf spring and the inner peripheral surface of the casing is long, the measuring jig may increase the moving time of the measuring jig or become unable to move due to the frictional resistance. ..

Japanese Unexamined Patent Publication No. 9-145303

The present invention has been made in view of the above circumstances, and is a shaft inclination measuring device capable of quickly moving to an arbitrary measurement position regardless of the length of the shaft and the state of the inner peripheral surface of the shaft. The purpose is to provide.

The present inventors have studied a shaft inclination measuring device that can be quickly moved to an arbitrary measurement position regardless of the length of the shaft and the state of the inner peripheral surface of the shaft. As a result of diligent studies, the present inventors have come up with the following configuration.

The shaft inclination measuring device according to the embodiment of the present invention measures the inclination angle of the shaft on the inner peripheral surface of the shaft.

A main frame extending in the extending direction of the shaft, a support portion provided on the main frame and supporting the main frame so that the main frame is along the inner peripheral surface of the shaft, and a support portion provided on the main frame and described above. A mainframe fixing actuator that presses the inner peripheral surface of the shaft so that the support portion is pressed against the inner peripheral surface of the shaft, and an inclination sensor provided on the mainframe that measures the inclination angle of the mainframe. Is equipped with. The mainframe is moved to the measurement position of the shaft in a state where the actuator for fixing the mainframe does not press the inner peripheral surface of the shaft, and the actuator for fixing the mainframe moves to the inner circumference of the shaft at the measurement position. By pressing the surface, the support portion is pressed against the inner peripheral surface of the shaft, the position of the shaft with respect to the inner peripheral surface is fixed, and the support portion is along the inner peripheral surface of the shaft.

As described above, in the shaft inclination measuring device, the hollow portion of the shaft is moved in the extending direction of the shaft in a state where the actuator for fixing the mainframe does not press the inner peripheral surface of the shaft. Therefore, the support portion of the shaft inclination measuring device, the actuator for fixing the mainframe, and the inner peripheral surface of the shaft are not in close contact with each other so as to cause frictional resistance that hinders movement. As a result, the shaft inclination measuring device can be quickly moved to an arbitrary measurement position regardless of the length of the shaft and the state of the inner peripheral surface of the shaft.

From another point of view, the shaft inclination measuring device of the present invention preferably includes the following configurations. At least three places of the support portion are in contact with the inner peripheral surface of the shaft, and at least two places are separated from each other in the extending direction of the shaft and are in contact with the inner peripheral surface of the shaft.

As described above, in the shaft inclination measuring device, at least three of the support portions are pressed against the inner peripheral surface of the shaft by the actuator for fixing the main frame, so that the main frame is in the extending direction of the shaft. It is arranged along the inner peripheral surface. Further, in the shaft inclination measuring device, since the support members in contact with the inner peripheral surface of the shaft are dispersedly arranged, even if the inner peripheral surface of the shaft and the support member come into contact with each other, the movement can be performed. Friction resistance that hinders it is unlikely to occur. As a result, the shaft inclination measuring device can be quickly moved to an arbitrary measurement position regardless of the length of the shaft and the state of the inner peripheral surface of the shaft.

From another point of view, the shaft inclination measuring device of the present invention preferably includes the following configurations. The support portion is composed of rollers that are rotatable in the extending direction of the shaft, and the rollers come into contact with the inner peripheral surface of the shaft.

As described above, in the shaft inclination measuring device, the support member is configured by a roller rotatable in the extension direction of the shaft, which is the movement direction of the main frame, so that the support member can be moved during the movement of the main frame. Even if it comes into contact with the inner peripheral surface of the shaft, the generation of frictional resistance is further suppressed. As a result, the shaft inclination measuring device can be quickly moved to an arbitrary measurement position regardless of the length of the shaft and the state of the inner peripheral surface of the shaft.

From another point of view, the shaft inclination measuring device of the present invention preferably includes the following configurations. The shaft is provided with a balance for suspending the main frame and at least one pulley provided on the main frame for hanging a wire, and is suspended from the balance via a wire hung on the pulley. It is moved to the measurement position of.

As described above, since the shaft inclination measuring device is suspended by the wire hung on the pulley via the balance, it is difficult to rotate around the axis of the shaft. Further, since the shaft inclination measuring device is suspended by the wire, the suspension position with respect to the shaft is adjusted by the deflection of the wire. As a result, the shaft inclination measuring device can be quickly moved to an arbitrary measurement position regardless of the length of the shaft and the state of the inner peripheral surface of the shaft.

From another point of view, the shaft inclination measuring device of the present invention preferably includes the following configurations. A rod provided with the balance is provided at an end thereof, and the rod is moved to the measurement position of the shaft by the rod in a state of being suspended from the balance via the wire.

As described above, since the shaft inclination measuring device is suspended from the rod, which is a rod-shaped member having high rigidity, by the two wires via the balance, it is difficult to rotate around the axis of the shaft. Further, since the shaft inclination measuring device is suspended from the rod via the wire, the suspension position is adjusted according to the shaft by the deflection of the wire. As a result, the shaft inclination measuring device can be quickly moved to an arbitrary measurement position regardless of the length of the shaft and the state of the inner peripheral surface of the shaft.

From another point of view, the shaft inclination measuring device of the present invention preferably includes the following configurations. A subframe that prevents the mainframe from falling, a subframe fixing actuator that is provided on the subframe and that fixes the position of the subframe with respect to the shaft by pressing the inner peripheral surface of the shaft, and the main. A moving actuator connected to the frame and the subframe and capable of changing the distance between the main frame and the subframe in the extension direction of the shaft is provided.

The shaft inclination measuring device fixes the position of the subframe with respect to the shaft by the actuator for fixing the subframe, moves the main frame to the measurement position by the moving actuator with the subframe as a base point, and moves the main frame to the measurement position. When the position of the main frame with respect to the shaft is fixed by the frame fixing actuator, the pressing of the inner peripheral surface of the shaft by the subframe fixing actuator is released, and the subframe is brought close to the main frame by the moving actuator. Move in the direction you want.

As described above, in the shaft inclination measuring device, the moving actuator is extended in the extension direction of the shaft while the subframe is fixed to the inner peripheral surface of the shaft by the subframe fixing actuator. The main frame can be moved in the extending direction of the shaft with the subframe as a base point while preventing the main frame from falling. At this time, since the inner peripheral surface of the shaft is not pressed by the mainframe fixing actuator, the support portion, the mainframe fixing actuator, and the inner peripheral surface of the shaft have frictional resistance that hinders movement. Is not so close that it occurs.

Next, the shaft inclination measuring device draws the subframe to the main frame in a state where the main frame is fixed to the inner peripheral surface of the shaft by the actuator for fixing the main frame. At this time, since the inner peripheral surface of the shaft is not pressed by the subframe fixing actuator, the subframe, the subframe fixing actuator, and the inner peripheral surface of the shaft have frictional resistance that hinders movement. Is not so close that it occurs.

As described above, the shaft inclination measuring device switches the pressing state of the shaft by the actuator for fixing the main frame and the actuator for fixing the subframe according to the movement between the main frame and the sub frame. As a result, the shaft inclination measuring device can be quickly moved to an arbitrary measurement position by the moving actuator regardless of the length of the shaft and the state of the inner peripheral surface of the shaft.

From another point of view, the shaft inclination measuring device of the present invention preferably includes the following configurations. The shaft inclination measuring device is connected to the main frame and the subframe, and includes a guide member that suppresses the rotation of the main frame with respect to the subframe around the axis of the shaft.

As described above, in the shaft inclination measuring device provided with the subframe, the guide member suppresses the rotation of the shaft between the subframe and the main frame around the axis of the shaft. Therefore, the shaft inclination measuring device improves the stability of the posture of the main frame when the main frame is moved with the sub frame as a base point. As a result, the shaft inclination measuring device can be quickly moved to an arbitrary measurement position by the moving actuator regardless of the length of the shaft and the state of the inner peripheral surface of the shaft.

From another point of view, the shaft inclination measuring device of the present invention preferably includes the following configurations. The mainframe fixing actuator is a hydraulic cylinder, a pneumatic cylinder, or an electric cylinder. The moving actuator and the subframe fixing actuator are a hydraulic cylinder, a pneumatic cylinder, or an electric cylinder, respectively.

As described above, since the shaft inclination measuring device is composed of a hydraulic cylinder, a pneumatic cylinder or an electric cylinder in which each actuator can be controlled, it is possible to change the pressing state of the inner peripheral surface of the shaft during movement. can. As a result, the shaft inclination measuring device can be quickly moved to an arbitrary measurement position by the moving actuator regardless of the length of the shaft and the state of the inner peripheral surface of the shaft.

As the effect of the present invention, the following effects are exhibited.

According to one embodiment of the present invention, the shaft inclination measuring device is quickly moved to an arbitrary measurement position by the moving actuator regardless of the length of the shaft and the state of the inner peripheral surface of the shaft. Can be done.

FIG. 1 is a schematic view showing an overall configuration of a shaft inclination measuring device according to a first embodiment. FIG. 2 shows the main body of the shaft inclination measuring device. (A) shows the front view of the shaft inclination measuring apparatus main body, and (B) shows the side view of the shaft inclination measuring apparatus main body. FIG. 3 is a side view showing a state in which the main body of the shaft inclination measuring device is inserted into the casing. FIG. 4 is a side view showing a state in which the main body of the shaft inclination measuring device is placed along the casing. FIG. 5 is a side view of the main body of the shaft inclination measuring device according to the second embodiment of the shaft inclination measuring device. FIG. 6 is a side view of the main body of the shaft inclination measuring device according to the third embodiment of the shaft inclination measuring device. FIG. 7 is a side view of the main body of the shaft inclination measuring device according to the fourth embodiment of the shaft inclination measuring device. FIG. 8 shows a mainframe advancing step in the fourth embodiment of the shaft inclination measuring device. (A) shows a side view of a shaft inclination measuring device main body in which a subframe is fixed, (B) shows a side view of a shaft inclination measuring device main body in which the main frame is advanced, and (C) shows a side view of a shaft inclination measuring device main body. The side view of the shaft inclination measuring apparatus main body which fixed the above is shown. FIG. 9 shows a subframe forward step in the fourth embodiment of the shaft inclination measuring device. (A) shows a side view of a shaft inclination measuring device main body in which a subframe is opened, (B) shows a side view of a shaft inclination measuring device main body in which a subframe is advanced, and (C) shows a side view of a shaft inclination measuring device main body in which the subframe is advanced. The side view of the shaft inclination measuring apparatus main body which fixed the above is shown.

Hereinafter, each embodiment will be described with reference to the drawings. In each figure, the same parts are designated by the same reference numerals, and the description of the same parts will not be repeated. The dimensions of the constituent members in each drawing do not faithfully represent the actual dimensions of the constituent members and the dimensional ratio of each constituent member.

The shaft inclination measuring device 1 which is the first embodiment of the shaft inclination measuring device according to the present invention will be described with reference to FIGS. 1 and 2. FIG. 1 is a side view showing the overall configuration of the shaft inclination measuring device 1 according to the first embodiment of the present invention. FIG. 2A shows a front view of the shaft inclination measuring device main body 2. FIG. 2B shows a side view of the shaft inclination measuring device main body 2. In the present embodiment, the shaft inclination measuring device 1 measures the inclination of the casing W constituting the shaft driven into the inside of the stand pipe S.

As shown in FIG. 1, the shaft inclination measuring device 1 is a measuring device for measuring the inclination of the inner peripheral surface Wp of the casing W. The shaft inclination measuring device 1 includes a shaft inclination measuring device main body 2, a delta balance 9, a hose reel portion 10, and a cable reel portion 11.

As shown in FIGS. 2A and 2B, the shaft inclination measuring device main body 2 included in the shaft inclination measuring device 1 is a portion inserted into the casing W which is a hollow portion of the casing W. The shaft inclination measuring device main body 2 includes a main frame 3, a support portion 4, a main frame fixing hydraulic cylinder 5 which is an actuator for fixing the main frame, an inclination sensor 6, and a pulley 7.

The main frame 3 is a main structure constituting the shaft inclination measuring device main body 2. The main frame 3 is composed of a pair of plate-shaped members arranged in parallel with the plate surfaces facing each other. The pair of plate-shaped members are connected to each other. The main frame 3 is formed in a substantially rectangular shape in a plan view. That is, the main frame 3 is configured to extend in the extending direction of the casing W. Hydraulic cylinder mounting portions 3a for fixing the mainframe fixing actuator are provided at both ends of the mainframe 3 in the longitudinal direction. The hydraulic cylinder mounting portion 3a projects perpendicular to the longitudinal direction of the main frame 3 and along the plate surface of the pair of plate-shaped members. That is, the hydraulic cylinder mounting portion 3a protrudes in the radial direction centered on substantially the center of the main frame when viewed in the longitudinal direction of the main frame 3.

The support portion 4 supports the main frame 3. Support portions 4 are provided at both ends of the main frame 3 in the longitudinal direction. The support portion 4 at each end of the main frame 3 is arranged so as to be able to support the pressing force of the hydraulic cylinder 5 for fixing the main frame. For example, each support portion 4 at each end portion of the main frame 3 is arranged so as to have line symmetry with the axis of the main frame fixing hydraulic cylinder 5 as a symmetric line when viewed in the longitudinal direction of the main frame 3. In the present embodiment, the support portion 4 is composed of an arc-shaped member having an arc portion centered on substantially the center of the main frame 3 when viewed in the longitudinal direction of the main frame 3. The support portion 4 is arranged so that the curved surface protrudes in the direction opposite to the protruding direction of the hydraulic cylinder mounting portion 3a. Further, the support portion 4 is composed of an arcuate member having an outer diameter larger than the inner diameter of the casing W. When the support portion 4 of each end portion configured in this manner comes into contact with the inner peripheral surface Wp (see FIG. 3) of the casing W, the support portion 4 becomes axisymmetric with the axis of the mainframe fixing hydraulic cylinder 5 as a symmetric line. In this way, they come into contact with the inner peripheral surface Wp of the casing W at two places. That is, the support portions 4 provided at both ends of the main frame 3 are in contact with the inner peripheral surface Wp of the casing W at four locations and at two locations separated from each other in the extending direction of the casing W. It is configured to do.

The hydraulic cylinder 5 for fixing the main frame fixes the main frame 3 at the measurement position Pm of the casing W. The hydraulic cylinder 5 for fixing the main frame is fixed to the hydraulic cylinder mounting portion 3a of the main frame 3, respectively. The hydraulic cylinder 5 for fixing the main frame has a fixed position P5f in which the piston rod 5a moves outward in the radial direction centered on substantially the center of the main frame 3 when viewed in the longitudinal direction of the main frame 3, and inward in the radial direction. The piston rod 5a is arranged so as to switch to the moved open position P5r. As a result, when the mainframe fixing hydraulic cylinder 5 is switched to the fixed position P5f, the support portion 4 arranged so as to face the hydraulic cylinder mounting portion 3a when viewed in the longitudinal direction of the mainframe 3 is radially oriented. The reaction force that pushes outward is transmitted.

The tilt sensor 6 measures the tilt of the main frame 3. The tilt sensor 6 is a capacitance type tilt sensor 6. Further, the tilt sensor 6 is a biaxial tilt sensor that detects the tilt angle of the X axis orthogonal to the vertical direction and the tilt angle of the Y axis orthogonal to the vertical direction and the X axis with respect to the vertical direction. The tilt sensor 6 is arranged so that the X-axis and the Y-axis are perpendicular to the longitudinal direction of the main frame 3. That is, the tilt sensor 6 is configured to be able to detect the tilt angle of the main frame 3 in the longitudinal direction with respect to the vertical direction by the X axis and the Y axis.

The two pulleys 7 are hung with wires 8 for suspending the shaft inclination measuring device main body 2. The two pulleys 7 are provided at one end of the main frame 3. The two pulleys 7 are arranged side by side at predetermined intervals in a direction orthogonal to the longitudinal direction of the main frame 3. In the present embodiment, the two pulleys 7 are arranged so that the axis of the rotating shaft faces in the pressing direction of the hydraulic cylinder 5 for fixing the main frame. One wire 8 is hung on the two pulleys 7.

The delta balance 9, which is a balance, is connected to a wire 8 for suspending the shaft inclination measuring device main body 2. The delta balance 9 is formed in a substantially triangular shape. In the delta balance 9, the central top is used as a fulcrum 9a supported by a hook such as a crane C, and the tops of both ends are used as action points 9b for suspending a suspended load. In the present embodiment, both ends of one wire 8 hung on two pulleys 7 of the shaft inclination measuring device main body 2 are connected to each action point 9b of the delta balance 9. That is, the delta balance 9 suspends the shaft inclination measuring device main body 2 in a state equal to the state of being suspended by two wires 8 having the same length with a predetermined interval.

As shown in FIG. 1, the hose reel portion 10 feeds in and out a hydraulic hose 10e that supplies hydraulic oil to the shaft inclination measuring device main body 2. The hose reel portion 10 is attached to a stand pipe S or the like installed in advance. The hose reel portion 10 is composed of a hose reel 10a, a hose reel driving motor 10b, a weight roller 10c, a guide sheep 10d, a hydraulic hose 10e, and the like. The hydraulic hose 10e and the like are connected to the hydraulic cylinder 5 for fixing the main frame of the shaft inclination measuring device main body 2.

The hose reel portion 10 drives the hose reel 10a rotatably supported by the common frame 12 by the hose reel driving motor 10b, thereby feeding out the hydraulic hose 10e stored in the hose reel 10a, and the hydraulic hose 10e. Can be carried in. Further, the hose reel portion 10 has a weight roller 10c so that a constant tension is generated in the drawn hydraulic hose 10e. Further, the hose reel portion 10 has a guide sheep 10d that maintains the position of the extended hydraulic hose 10e. The hose reel portion 10 is controlled to feed or feed the hydraulic hose 10e according to the movement of the shaft inclination measuring device main body 2.

The cable reel portion 11 is for feeding and feeding power cables, signal lines, and the like for transmitting power and control signals to the shaft inclination measuring device main body 2. The cable reel portion 11 is attached to a stand pipe S or the like installed in advance. The cable reel portion 11 is composed of a cable reel 11a, a cable reel driving motor 11b, a weight roller 11c, a guide sheep 11d, a power cable, a signal line, and the like. The power cable, signal line, and the like are connected to the main frame fixing actuator of the shaft inclination measuring device main body 2, the inclination sensor 6, and the like.

The cable reel portion 11 drives the cable reel 11a rotatably supported by the common frame 12 by the cable reel driving motor 11b, so that the power cable, signal line, etc. (hereinafter, signal lines) housed in the cable reel 11a are driven. It is possible to feed the electric wire 11e by simply feeding out the wire (referred to as "electric wire 11e"). Further, the cable reel portion 11 has a weight roller 11c so that a constant tension is generated in the unwound electric wire 11e. Further, the cable reel portion 11 has a guide sheep 11d that maintains the position of the unwound electric wire 11e. The cable reel portion 11 is controlled so as to feed or feed the electric wire 11e according to the movement of the shaft inclination measuring device main body 2.

In the shaft inclination measuring device 1 configured as described above, the shaft inclination measuring device main body 2 suspended from the crane C via the delta balance 9 directs the longitudinal direction of the main frame 3 toward the extension direction of the casing W, and the casing It is inserted inside W. As a result, the hydraulic cylinder 5 for fixing the main frame in the shaft inclination measuring device main body 2 is arranged so as to expand and contract in the radial direction of the casing W. That is, the mainframe fixing hydraulic cylinder 5 is arranged so as to press the inner peripheral surface Wp of the casing W. Further, the support portion 4 in the shaft inclination measuring device main body 2 is arranged so that the arc-shaped portion projects in the radial direction of the casing W. That is, the arc-shaped portion of the support portion 4 is arranged so as to come into contact with the inner peripheral surface Wp of the casing W.

Next, the measurement of the inclination angle of the casing W by the shaft inclination measuring device 1 will be described with reference to FIGS. 3 and 4. FIG. 3 is a side view showing a state in which the shaft inclination measuring device main body 2 of the shaft inclination measuring device 1 according to the first embodiment of the present invention is inserted into the casing W. FIG. 4 is a side view showing a state in which the shaft inclination measuring device main body 2 of the shaft inclination measuring device 1 according to the first embodiment of the present invention is placed along the casing W. In the present embodiment, it is assumed that the shaft inclination measuring device main body 2 is inserted into the casing W in a state of being suspended by the crane C via the delta balance 9 (see FIG. 1).

The shaft inclination measuring device 1 pays out the hydraulic hose 10e and the like and the electric wire 11e from the hose reel portion 10 and the cable reel portion 11 in accordance with the feeding of the hook of the crane C (see FIG. 1).

As shown in FIG. 3, the shaft inclination measuring device main body 2 descends inside the casing W with the longitudinal direction of the main frame 3 as the moving direction. At this time, in the shaft inclination measuring device main body 2, both ends of the wires 8 hung on the two pulleys 7 are connected to the working point 9b of the delta balance 9, so that the rotation of the casing W around the axis is suppressed. Ru. The hydraulic cylinder 5 for fixing the main frame of the shaft inclination measuring device main body 2 is held at the open position P5r. That is, since the piston rod 5a of the mainframe fixing hydraulic cylinder 5 moves inward in the radial direction of the casing W, it does not press the inner peripheral surface Wp of the casing W. Therefore, there is not enough frictional resistance between the mainframe fixing hydraulic cylinder 5 and the support portion 4 and the inner peripheral surface Wp of the casing W to hinder the movement of the shaft inclination measuring device main body 2.

As shown in FIG. 4, the shaft inclination measuring device 1 switches the mainframe fixing hydraulic cylinder 5 to the fixed position P5f when the shaft inclination measuring device main body 2 reaches the measurement position Pm of the casing W. That is, the piston rod 5a of the mainframe fixing hydraulic cylinder 5 presses the inner peripheral surface Wp of the casing W by being moved outward in the radial direction of the casing W. Further, the hydraulic cylinder 5 for fixing the main frame presses the support portion 4 arranged at a position facing the hydraulic cylinder mounting portion 3a in the longitudinal direction of the main frame 3 outward in the radial direction. Therefore, a frictional resistance is generated between the mainframe fixing hydraulic cylinder 5 and the support portion 4 and the inner peripheral surface Wp of the casing W to the extent that the movement of the shaft inclination measuring device main body 2 is hindered.

The support portion 4 of the shaft inclination measuring device main body 2 is pressed against the inner peripheral surface Wp of the casing W at a position aligned in the extending direction of the casing W. As a result, the main frame 3 of the shaft inclination measuring device main body 2 is fixed to the casing W in a state in which the longitudinal direction is along the extending direction of the inner peripheral surface Wp of the casing W. Similarly, the tilt sensor 6 attached to the main frame 3 is arranged so that the X-axis and the Y-axis, which are measurement references, are orthogonal to the longitudinal direction of the main frame 3. That is, the tilt sensor 6 detects the tilt angle of the main frame 3 in the longitudinal direction with respect to the vertical direction by the tilt angle of the X axis and the tilt angle of the Y axis. As a result, the shaft inclination measuring device 1 can acquire the inclination angle in the main frame 3 as the inclination angle at the measurement position Pm of the casing W.

When the measurement of the inclination angle of the casing W at the measurement position Pm is completed, the shaft inclination measuring device 1 switches the hydraulic cylinder 5 for fixing the main frame to the open position P5r. That is, the piston rod 5a of the mainframe fixing hydraulic cylinder 5 is separated from the inner peripheral surface Wp of the casing W by being moved inward in the radial direction of the casing W. Further, the hydraulic cylinder 5 for fixing the main frame does not press the support portion 4 outward in the radial direction. Therefore, there is no frictional resistance between the mainframe fixing hydraulic cylinder 5 and the support portion 4 and the inner peripheral surface Wp of the casing W to the extent that the movement of the shaft inclination measuring device main body 2 is hindered. The shaft inclination measuring device main body 2 is moved by the crane C to the next measuring position Pm.

The shaft inclination measuring device main body 2 configured as described above is moved inside the casing W in the axial direction of the casing W in a state where the hydraulic cylinder 5 for fixing the main frame does not press the inner peripheral surface Wp of the casing W. .. Therefore, the support portion 4 of the shaft inclination measuring device main body 2, the hydraulic cylinder 5 for fixing the main frame, and the inner peripheral surface Wp of the casing W are in close contact with each other so as to cause frictional resistance that hinders the movement of the shaft inclination measuring device main body 2. not.

Further, at the measurement position Pm, the shaft inclination measuring device main body 2 has two support portions 4 provided at both ends of the main frame 3 on the inner peripheral surface Wp of the casing W by the hydraulic cylinder 5 for fixing the main frame. Pressed. Therefore, the main frame 3 is arranged along the inner peripheral surface Wp of the casing W. Further, since the support portion 4 in contact with the inner peripheral surface Wp of the casing W is dispersedly arranged in the shaft inclination measuring device main body 2, the inner peripheral surface Wp of the casing W is arranged when the shaft inclination measuring device main body 2 is moved. Even if it comes into contact with at least one of the support portions 4, frictional resistance that hinders movement is unlikely to occur.

Further, since the shaft inclination measuring device main body 2 is suspended by the wires 8 hung on the two pulleys 7 via the delta balance 9, it is difficult to rotate around the axis of the casing W. Further, since the shaft inclination measuring device main body 2 is suspended by the wire 8, the suspension position with respect to the casing W is adjusted by the deflection of the wire 8. As a result, the shaft inclination measuring device 1 can quickly move the shaft inclination measuring device main body 2 to an arbitrary measurement position Pm regardless of the length of the casing W and the state of the inner peripheral surface Wp of the casing W. Further, since the shaft inclination measuring device 1 fixes the main frame 3 along the casing W by the hydraulic cylinder 5 for fixing the main frame at the measurement position Pm, the inclination angle of the casing W at the measurement position Pm is surely measured. can do.

Next, the shaft inclination measuring device 1A, which is the second embodiment of the present invention, will be described with reference to FIG. FIG. 5 is a side view showing a state in which the shaft inclination measuring device main body 2 of the shaft inclination measuring device 1A according to the second embodiment of the present invention is inserted into the casing W. The shaft inclination measuring device 1A according to each of the following embodiments is the name used in the description as being applied in place of the shaft inclination measuring device 1 in the shaft inclination measuring device 1 shown in FIGS. 1 to 4. , Figure number, and code are used to refer to the same thing. In the following embodiments, the same points as those of the embodiments already described will be omitted, and the differences will be mainly described.

As shown in FIG. 5, the shaft inclination measuring device main body 2A included in the shaft inclination measuring device 1A is a portion inserted into the casing W which is a hollow portion of the casing W. The shaft inclination measuring device main body 2A includes a main frame 3, a support roller 13 which is a support portion, a hydraulic cylinder for fixing the main frame 5, an inclination sensor 6, and a pulley 7.

The support roller 13 supports the main frame 3. A plurality of support rollers 13 are provided at both ends of the main frame 3 in the longitudinal direction. Each support roller 13 at each end of the main frame 3 is arranged so as to be able to support the pressing force of the hydraulic cylinder 5 for fixing the main frame. For example, each support roller 13 at each end of the main frame 3 is arranged so as to have line symmetry with the axis of the main frame fixing hydraulic cylinder 5 as a symmetric line when viewed in the longitudinal direction of the main frame 3. Further, the support roller 13 is provided so as to be rotatable in the longitudinal direction of the main frame 3. The plurality of support rollers 13 arranged in this way restrict the movement of the main frame 3 in the radial direction of the casing W and allow the movement of the main frame 3 in the axial direction of the casing W.

In the present embodiment, two support rollers 13 at each end of the main frame 3 are axisymmetric so that the axis of the hydraulic cylinder 5 for fixing the main frame is the axis of symmetry when viewed in the longitudinal direction of the main frame 3. It is provided. That is, the four support rollers 13 provided at each end of the main frame 3 are in contact with the inner peripheral surface Wp of the casing W, and two of them are separated from each other in the axial direction of the casing W. It is configured to come into contact with the inner peripheral surface Wp of the. The support roller 13 is provided with one roller having a sufficient width so as to have line symmetry with the axis of the hydraulic cylinder 5 for fixing the main frame as a line of symmetry when viewed in the longitudinal direction of the main frame 3. May be good.

The shaft inclination measuring device 1A feeds out the hydraulic hose 10e and the like and the electric wire 11e from the hose reel portion 10 and the cable reel portion 11 in accordance with the feeding of the hook of the crane C (see FIG. 1). The shaft inclination measuring device main body 2A descends inside the casing W with the longitudinal direction of the main frame 3 as the moving direction. The hydraulic cylinder 5 for fixing the main frame of the shaft inclination measuring device main body 2A is held at the open position P5r. That is, since the piston rod 5a of the mainframe fixing hydraulic cylinder 5 moves inward in the radial direction of the casing W, it does not press the inner peripheral surface Wp of the casing W. Further, the support roller 13 of the shaft inclination measuring device 1A is configured to be rotatable in the moving direction of the shaft inclination measuring device main body 2A. Therefore, a frictional resistance is generated between the mainframe fixing hydraulic cylinder 5 and the support roller 13 and the inner peripheral surface Wp of the casing W to the extent that the rotation of the support roller 13 hinders the movement of the shaft inclination measuring device main body 2A. Not.

As described above, in the shaft inclination measuring device 1A, since the main frame 3 is supported by the support roller 13 that is rotatable in the moving direction of the main frame 3, the support roller 13 casing W is being moved while the shaft inclination measuring device main body 2A is moving. Even if it comes into contact with the inner peripheral surface Wp of the above, the generation of frictional resistance is further suppressed by the rotation of the support roller 13. As a result, the shaft inclination measuring device 1A can quickly move the shaft inclination measuring device main body 2A to an arbitrary measurement position Pm regardless of the length of the casing W and the state of the inner peripheral surface Wp of the casing W.

Next, the shaft inclination measuring device 1B, which is the third embodiment of the present invention, will be described with reference to FIG. FIG. 6 is a side view showing a state in which the shaft inclination measuring device main body 2 of the shaft inclination measuring device 1B according to the third embodiment of the present invention is inserted into the casing W.

As shown in FIG. 6, the shaft inclination measuring device 1B is a measuring device for measuring the inclination angle of the inner peripheral surface Wp of the casing W which is a shaft. The shaft inclination measuring device 1B includes a shaft inclination measuring device main body 2, at least one rod 14, a delta balance 9, a hose reel portion 10 (see FIG. 1), and a cable reel portion 11 (see FIG. 1).

The rod 14 is moved to the measurement position Pm while suspending the shaft inclination measuring device main body 2. The rod 14 is composed of a rod-shaped member having a high rigidity and a predetermined length. The rod 14 is configured to be connectable to another rod 14 or the hook of the crane C at both ends. That is, the rod 14 is suspended from the crane C or is connected to another rod 14.

A rod holding device 12a is provided on the common frame 12 provided with the hose reel 10a and the cable reel 11a. The rod holding device 12a holds one rod 14 connected to the hook of the crane C. One rod 14 held by the rod holding device 12a prevents the rod 14 from falling when the hook of the crane C is removed. In this way, the rod holding device 12a holds the one rod 14 removed from the crane C in order to connect the other rod 14 to the one rod 14 suspended from the crane C.

A delta balance 9 is connected to one side end of the rod 14 which is closest to the shaft inclination measuring device main body 2. Both ends of a single wire 8 hung on two pulleys 7 of the shaft inclination measuring device main body 2 are connected to each action point 9b of the delta balance 9. That is, at one end of the rod 14, the shaft inclination measuring device main body 2 is suspended in a state of being suspended by two wires of the same length at predetermined intervals via a delta balance 9. Suspended. The single wire 8 hung on the two pulleys 7 of the shaft inclination measuring device main body 2 is configured to have a length such that the position and posture of the vertical shaft inclination measuring device main body 2 follow the casing W. The other end of the rod 14 is connected to the hook of the crane C. As described above, the shaft inclination measuring device main body 2 suspended from the delta balance 9 is connected to the hook of the crane C via at least one rod 14. As a result, the shaft inclination measuring device main body 2 is suspended from the crane C in a combination in which the proportion of the rod 14 having higher rigidity than the wire 8 is larger.

The shaft inclination measuring device 1B pays out the hydraulic hose 10e and the electric wire 11e from the hose reel portion 10 and the cable reel portion 11 in accordance with the feeding of the hook of the crane C (see FIG. 1). The shaft inclination measuring device main body 2 descends inside the casing W with the longitudinal direction of the main frame 3 as the moving direction. At this time, since the shaft inclination measuring device main body 2 is suspended from the crane C in a configuration in which the proportion of the rod 14 having higher rigidity than the wire 8 is larger, the rotation of the casing W around the axis due to the twist of the wire 8 is suppressed. Will be done.

As described above, since the shaft inclination measuring device main body 2 is suspended from the rod 14 having a higher rigidity than the wire 8 via the wire 8 and the delta balance 9, it is difficult to rotate around the axis of the casing W. Further, since the shaft inclination measuring device main body 2 is suspended from the delta balance 9 via the wire 8, the suspension position is adjusted according to the casing W by the deflection of the wire 8. As a result, the shaft inclination measuring device main body 2 quickly moves the shaft inclination measuring device main body 2 to an arbitrary measurement position Pm in a predetermined posture regardless of the length of the casing W and the state of the inner peripheral surface Wp of the casing W. Can be made to.

Next, the shaft inclination measuring device 1C according to the fourth embodiment of the present invention will be described with reference to FIGS. 7 to 9. FIG. 7 is a side view of the shaft inclination measuring device main body 2 of the shaft inclination measuring device 1C according to the fourth embodiment of the present invention. FIG. 8 is a diagram showing a mainframe advancing step of the shaft inclination measuring device 1C according to the fourth embodiment of the present invention. FIG. 9 is a diagram showing a subframe forward step of the shaft inclination measuring device 1C according to the fourth embodiment of the present invention.

As shown in FIG. 7, the shaft inclination measuring device main body 2C included in the shaft inclination measuring device 1C is a portion inserted into the casing W which is a hollow portion of the casing W. The shaft inclination measuring device main body 2C includes a main frame 3, a support portion 4, a hydraulic cylinder for fixing the main frame 5, an inclination sensor 6, a subframe 15, a hydraulic cylinder for fixing the subframe 16 which is an actuator for fixing the subframe, and an actuator for moving. The moving hydraulic cylinder 17 and the guide member 18 are provided.

The subframe 15 prevents the main frame 3 from falling. The subframe 15 is composed of a rectangular parallelepiped in which plate-shaped members are combined. A hydraulic cylinder mounting surface 15a for fixing the hydraulic cylinder 16 for fixing the subframe is provided on one side surface of the subframe 15. Further, a support surface 15b is provided on another side surface facing the hydraulic cylinder mounting surface 15a. A wire for preventing falling off is connected to the subframe 15.

The subframe fixing hydraulic cylinder 16 fixes the subframe 15 at an arbitrary position on the casing W. The hydraulic cylinder 16 for fixing the subframe is fixed to the hydraulic cylinder mounting surface 15a of the subframe 15. The hydraulic cylinder 16 for fixing the subframe has a fixed position P16f in which the piston rod 16a moves from the hydraulic cylinder mounting surface 15a to the outside of the subframe 15, and an open position P16r in which the piston rod 16a moves inward of the subframe 15. It is arranged so as to switch to. As a result, when the hydraulic cylinder 16 for fixing the subframe is switched to the fixed position P16f, the reaction force that presses the support surface 15b arranged in the opposite direction of the hydraulic cylinder mounting surface 15a to the outside of the subframe 15. Is transmitted.

The moving hydraulic cylinder 17 moves the shaft inclination measuring device main body 2C. The piston rod 17a of the moving hydraulic cylinder 17 is connected to the subframe 15. The piston rod 17a of the moving hydraulic cylinder 17 is arranged so as to be orthogonal to the moving direction of the piston rod 16a of the subframe fixing hydraulic cylinder 16. The piston rod 17a of the moving hydraulic cylinder 17 is covered with a bellows cover 17c that can be expanded and contracted in the axial direction. The cylinder tube 17b of the moving hydraulic cylinder 17 is connected to the shaft inclination measuring device main body 2C. The cylinder tube 17b is arranged along the longitudinal direction of the main frame 3. That is, the moving hydraulic cylinder 17 is configured so that the distance between the main frame 3 and the subframe 15 in the longitudinal direction of the shaft inclination measuring device main body 2C can be changed. The moving hydraulic cylinder 17 is arranged so as to switch between a separated position P17s separated from the subframe 15 and the main frame 3 and a close position P17c in which the subframe 15 and the main frame 3 are close to each other.

The guide member 18 holds the posture of the main frame 3 with respect to the sub frame 15. The guide member 18 is composed of a rod-shaped member. The guide member 18 is connected to the subframe 15 so as to be parallel to the piston rod 17a of the moving hydraulic cylinder 17. Further, the guide member 18 is held in the main frame 3 so as to be slidable in the axial direction. The guide member 18 moves integrally with the subframe 15 when the distance between the main frame 3 and the subframe 15 is changed by the moving hydraulic cylinder 17. On the other hand, the guide member 18 slides in the axial direction with respect to the main frame 3. At this time, since the guide member 18 is arranged in parallel with the piston rod 17a of the moving hydraulic cylinder 17, the posture of the main frame 3 with respect to the subframe 15 is maintained.

The shaft inclination measuring device main body 2C configured as described above is inserted into the inside of the casing W from the main frame 3 with the longitudinal direction of the main frame 3 facing the extending direction of the casing W (see FIG. 8). As a result, the shaft inclination measuring device main body 2C is arranged by the moving hydraulic cylinder 17 so as to change the distance between the main frame 3 and the subframe 15 in the axial direction of the casing W. Further, the hydraulic cylinder 16 for fixing the subframe in the subframe 15 is arranged so that the piston rod 16a expands and contracts in the radial direction of the casing W. That is, the subframe fixing hydraulic cylinder 16 is arranged so as to press the inner peripheral surface Wp of the casing W. Further, the support surface 15b in the subframe 15 is arranged so as to be in contact with the inner peripheral surface Wp of the casing W. That is, the support surface 15b in the subframe 15 is arranged so as to press the inner peripheral surface Wp of the casing W by the hydraulic cylinder 16 for fixing the subframe. As a result, the subframe 15 can prevent the shaft inclination measuring device main body 2C from falling when the main frame fixing hydraulic cylinder 5 is switched to the open position P5r.

Next, the mainframe forward step, the subframe forward step, the tilt measurement step, the mainframe reverse step, and the subframe reverse step in the measurement of the inclination angle of the casing W by the shaft inclination measuring device 1C will be described with reference to FIG. In the embodiment, in each step, the movement from the entrance of the casing W to the underground is defined as forward movement, and the movement from the underground to the entrance of the casing W is defined as reverse movement.

As shown in FIG. 8A, the shaft inclination measuring device 1C switches the hydraulic cylinder 16 for fixing the subframe to the fixed position P16f when the shaft inclination measuring device main body 2C is inserted into the casing W (white coating). See arrow). As a result, the subframe 15 is fixed inside the casing W.

As shown in FIG. 8B, as a mainframe forward step, the shaft inclination measuring device 1C switches the moving hydraulic cylinder 17 to the separation position P17s when the subframe 15 is fixed inside the casing W (white). See painted arrow). As a result, the main frame 3 is advanced inside the casing W by the stroke of the moving hydraulic cylinder 17 with the subframe 15 as a base point. At this time, the main frame 3 is restrained from rotating around the axis of the casing W by the guide member 18.

As shown in FIG. 8C, in the shaft inclination measuring device 1C, when the main frame 3 is advanced inside the casing W by the stroke of the moving hydraulic cylinder 17, the main frame fixing hydraulic cylinder 5 is fixed in a fixed position. Switch to P5f (see white-painted arrow). As a result, the main frame 3 is fixed to the inside of the casing W in a state in which the longitudinal direction is along the extending direction of the inner peripheral surface of the casing W.

As shown in FIG. 9A, as a subframe forward step, the shaft inclination measuring device 1C switches the subframe fixing hydraulic cylinder 16 to the open position P16r when the main frame 3 is fixed inside the casing W. (See whitewashed arrow). As a result, the subframe 15 is released from being fixed inside the casing W.

As shown in FIG. 9B, the shaft inclination measuring device 1C switches the moving hydraulic cylinder 17 to the proximity position P17c when the fixing is released inside the casing W of the subframe 15 (see the white-painted arrow). .. The subframe 15 is advanced to the vicinity of the main frame 3 with the main frame 3 as a base point. At this time, the subframe 15 is restrained from rotating around the axis of the casing W by the guide member 18.

As shown in FIG. 9C, the shaft inclination measuring device 1C switches the subframe fixing hydraulic cylinder 16 to the fixed position P16f when the subframe 15 is advanced to the vicinity of the main frame 3 (see the white-painted arrow). ). As a result, the subframe 15 is fixed inside the casing W.

When the main frame 3 has not reached the measurement position Pm of the casing W, the shaft inclination measuring device 1C again carries out the main frame advancing step and the subframe advancing step. On the other hand, the shaft inclination measuring device 1C carries out an inclination measuring step of measuring the inclination angle of the casing W when the main frame 3 reaches the measurement position Pm of the casing W.

As an inclination measuring step, the shaft inclination measuring device 1C detects the inclination angle of the X-axis and the inclination angle of the Y-axis in the longitudinal direction of the main frame 3 with respect to the vertical direction by the inclination sensor 6. The shaft inclination measuring device 1C calculates the inclination angle at the measurement position Pm of the casing W based on the detected inclination angle of the X axis and the inclination angle of the Y axis. The shaft inclination measuring device 1C carries out a mainframe forward step, a subframe forward step, and a tilt measurement step when measurements at other measurement positions Pm remain.

When the measurement of the inclination angle of the casing W is completed, the shaft inclination measuring device 1C carries out the subframe reverse step and the mainframe reverse step.

As a subframe reverse step, the shaft inclination measuring device 1C switches the hydraulic cylinder 16 for fixing the subframe to the open position P16r when the main frame 3 is fixed inside the casing W (see FIG. 9C). 9 (B)). As a result, the subframe 15 is released from being fixed inside the casing W.

The shaft inclination measuring device 1C switches the moving hydraulic cylinder 17 to the separation position P17s when the fixing is released inside the casing W of the subframe 15 (see FIG. 9A). As a result, the subframe 15 is moved backward inside the casing W by the stroke of the moving hydraulic cylinder 17 with the main frame 3 as the base point.

When the subframe 15 is moved backward inside the casing W by the stroke of the moving hydraulic cylinder 17, the shaft inclination measuring device 1C switches the subframe fixing hydraulic cylinder 16 to the fixed position P16f (see FIG. 8C). ). As a result, the subframe 15 is fixed inside the casing W.

As a reverse step of the main frame, the shaft inclination measuring device 1C switches the hydraulic cylinder 5 for fixing the main frame to the open position P5r when the subframe 15 is fixed inside the casing W. (See FIG. 8B) As a result, the main frame 3 is released from being fixed inside the casing W.

The shaft inclination measuring device 1C switches the moving hydraulic cylinder 17 to the proximity position P17c when the fixing is released inside the casing W of the main frame 3 (see FIG. 8A). As a result, the main frame 3 is moved backward inside the casing W by the stroke of the moving hydraulic cylinder 17 with the sub frame 15 as the base point.

When the main frame 3 is moved backward inside the casing W by the stroke of the moving hydraulic cylinder 17, the shaft inclination measuring device 1C switches the main frame fixing hydraulic cylinder 5 to the fixed position P5f (see FIG. 9C). ). As a result, the main frame 3 is fixed inside the casing W.

If the subframe 15 has not reached the entrance of the casing W, the shaft inclination measuring device 1C again performs the subframe reverse step and the mainframe reverse step. On the other hand, when the subframe 15 reaches the entrance of the casing W, the shaft inclination measuring device 1C ends the subframe reverse step and the mainframe reverse step.

As described above, the shaft inclination measuring device 1C fixes the subframe 15 to the inner peripheral surface Wp of the casing W by the hydraulic cylinder 16 for fixing the subframe, and the inner peripheral surface Wp of the casing W by the hydraulic cylinder 5 for fixing the main frame. Release the pressure of. As a result, the main frame 3 is supported by the subframe 15 via the moving hydraulic cylinder 17. At this time, the support portion 4, the hydraulic cylinder for fixing the main frame 5, and the inner peripheral surface Wp of the casing W are not in close contact with each other so as to cause frictional resistance that hinders the movement of the main frame 3. Therefore, the shaft inclination measuring device 1C can move the main frame 3 in the stretching direction of the casing W with the subframe 15 as a base point by extending the moving hydraulic cylinder 17 in the stretching direction of the casing W.

The shaft inclination measuring device 1C fixes the moved main frame 3 to the inner peripheral surface Wp of the casing W by the hydraulic cylinder 5 for fixing the main frame, and also fixes the moved main frame 3 to the inner peripheral surface Wp of the casing W by the hydraulic cylinder 16 for fixing the subframe. Release the pressure. As a result, the subframe 15 is supported by the main frame 3 via the moving hydraulic cylinder 17. At this time, the subframe 15, the hydraulic cylinder for fixing the subframe 16, and the inner peripheral surface Wp of the casing W are not in close contact with each other so as to cause frictional resistance that hinders the movement of the subframe 15. Therefore, the shaft inclination measuring device 1C can move the subframe 15 in the stretching direction of the casing W with the main frame 3 as a base point by contracting the moving hydraulic cylinder 17 in the stretching direction of the casing W.

Further, in the shaft inclination measuring device 1C, the guide member 18 suppresses the rotation of the casing W of the main frame 3 with respect to the subframe 15 around the axis. Therefore, the shaft inclination measuring device 1C improves the stability of the posture of the main frame 3 when the main frame 3 is moved with the subframe 15 as a base point. Further, since the shaft inclination measuring device 1C is composed of a controllable hydraulic cylinder, a pneumatic cylinder, or an electric cylinder, it is possible to change the contact state of the casing W with the inner peripheral surface Wp during movement. As a result, the shaft inclination measuring device 1C can quickly reach an arbitrary measurement position Pm by the moving hydraulic cylinder 17 regardless of the length of the tubular casing W and the state of the inner peripheral surface Wp of the casing W. 2C can be moved.

The above-described embodiment only shows a typical embodiment, and can be variously modified and implemented within a range that does not deviate from the gist of one embodiment. Further, of course, it can be carried out in various forms, and the scope of the present invention is indicated by the description of the scope of claims, and further, the equal meaning described in the scope of claims, and all within the scope. Including changes.

In the above embodiment, the shaft inclination measuring device main body 2 is composed of a main frame 3 in which a pair of plate-shaped members are combined. However, the main frame 3 may be formed in a substantially rectangular shape in a plan view so as to stably follow the inner peripheral surface Wp of the casing W. For example, the main frame 3 may be composed of a square pipe or the like.

Further, in the above-described embodiment, the shaft inclination measuring device 1 is provided with a support portion 4 composed of two arc-shaped members on the main frame 3. However, in the support portion 4, at least three places are in contact with the inner peripheral surface Wp of the casing W with respect to the inner peripheral surface Wp of the casing W, and at least two places are separated from each other in the extending direction of the casing W. Any shape may be used as long as it is in contact with the inner peripheral surface Wp of. By configuring the support portion 4 in this way, the shaft inclination measuring device 1C can come into contact with the inner peripheral surface Wp of the casing W in a stable posture.

1 Vertical shaft tilt measuring device 2 Vertical shaft tilt measuring device main body 3 Main frame 4 Support 5 Main frame fixing hydraulic cylinder 6 Tilt sensor 7 Pulley 8 Wire 9 Delta balance W casing

Claims (9)

A shaft inclination measuring device that measures the inclination angle of a shaft on the inner peripheral surface of the shaft.
The main frame extending in the extension direction of the shaft and
A support portion provided on the main frame and supporting the main frame so that the main frame is along the inner peripheral surface of the shaft.
An actuator for fixing the mainframe, which is provided on the mainframe and presses the inner peripheral surface of the shaft so that the support portion is pressed against the inner peripheral surface of the shaft.
A tilt sensor provided on the main frame and measuring the tilt angle of the main frame is provided.
The main frame is moved to the measurement position of the shaft in a state where the actuator for fixing the main frame does not press the inner peripheral surface of the shaft, and the actuator for fixing the main frame moves to the inner circumference of the shaft at the measurement position. By pressing the surface, the support portion is pressed against the inner peripheral surface of the shaft, the position of the shaft with respect to the inner peripheral surface is fixed, and the shaft inclination measuring device along the inner peripheral surface of the shaft. According to claim 1, at least three places of the support portion are in contact with the inner peripheral surface of the shaft, and at least two places are separated from each other in the extending direction of the shaft and are in contact with the inner peripheral surface of the shaft. The described shaft tilt measuring device. The shaft inclination measuring device according to claim 1 or 2, wherein the support portion is composed of a roller rotatable in the extending direction of the shaft, and the roller contacts the inner peripheral surface of the shaft. A balance that suspends the mainframe,
Provided on the mainframe with at least one pulley on which a wire is hung.
The shaft inclination measuring device according to any one of claims 1 to 3, wherein the shaft is moved to the measurement position of the shaft while being suspended from the balance via a wire hung on the pulley. A rod provided with the balance at the end is provided.
The shaft inclination measuring device according to claim 4, wherein the rod is moved to the measurement position of the shaft while being suspended from the balance via the wire. A subframe that prevents the mainframe from falling, and
A subframe fixing actuator provided on the subframe and fixing the position of the subframe with respect to the shaft by pressing the inner peripheral surface of the shaft.
A moving actuator, which is connected to the main frame and the subframe and can change the distance between the main frame and the subframe in the extension direction of the shaft, is provided.
The position of the subframe with respect to the shaft is fixed by the actuator for fixing the subframe, the main frame is moved to the measurement position by the moving actuator with the subframe as a base point, and the shaft is moved by the actuator for fixing the main frame. The claim that when the position of the main frame is fixed with respect to the main frame, the pressing of the inner peripheral surface of the shaft by the actuator for fixing the subframe is released, and the subframe is moved in a direction close to the main frame by the moving actuator. 1 or the shaft inclination measuring device according to claim 2. The shaft inclination measuring device according to claim 6, further comprising a guide member connected to the main frame and the subframe to suppress rotation of the main frame around the axis of the shaft with respect to the subframe. The shaft inclination measuring device according to claim 6 or 7, wherein the moving actuator and the subframe fixing actuator are hydraulic cylinders, pneumatic cylinders, or electric cylinders, respectively. The shaft inclination measuring device according to any one of claims 1 to 8, wherein the actuator for fixing the main frame is a hydraulic cylinder, a pneumatic cylinder, or an electric cylinder.

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