JPS6054606B2 - Inspection device for long objects - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an inspection device for measuring the dimensional accuracy of long objects such as track girders for monorails.

Measuring the cross-sectional dimensions and straightness of a long object that has no change in cross-sectional shape or a slight change in cross-sectional shape and is straight is relatively easy and accurate because the displacement of the measurement point is small. Can be done. However, for long objects that have curved sections, even if the change in cross-sectional shape is slight, such as track girders for monorails, the displacement of the measurement point becomes large, so there is no measuring device that can accommodate this. Cross-sectional dimensions, etc., were measured manually. This method not only takes a lot of time to measure, but also has the disadvantage that sufficient accuracy cannot be obtained, and it is difficult to measure objects with complex curvatures, such as transition curves and cut portions. In view of the above points, the present invention facilitates and automates the measurement of the dimensional accuracy of long objects having relatively small changes in cross-sectional shape and having curved parts or combinations of straight and curved parts, such as track girders for monorails. The aim is to shorten measurement time and improve measurement accuracy.

The present invention provides a gate-shaped frame that moves on reference rails laid parallel to both sides of a pedestal that supports an object to be measured, and a measurement frame that is supported so as to be able to move vertically and horizontally with respect to the frame. The measurement frame is positioned by specific parts to be measured on the top and side surfaces of the object to be measured, and the relative displacement between the gate-shaped frame and the measurement frame and the displacement of each point between the measurement frame and the object to be measured are measured. This method measures displacement in the longitudinal direction and displacement in cross-sectional dimension of an object to be inspected, making it easy to measure long objects and also enables automatic measurement if necessary.

Next, a measuring device for a monorail track girder according to an embodiment of the present invention will be explained based on the drawings.

Figure 1 is a cross-sectional view of the monorail track girder, which is the object to be tested.
FIG. 2 is a perspective view showing an example of the shape of the track girder. In the figure, the cross section of the track girder 1 has the shape shown in FIG. It becomes a surface.
Therefore, in order to check the accuracy of the track girder 1, it is necessary to measure these points. Further, the cross-sectional dimensions and shape of the track girder 1 must be kept approximately constant. FIG. 2 shows an example of the shape of the track girder 1, where the track girder 1a is a straight girder and 1b is a curved girder. There are many other shapes of the track girder 1, including a combination of straight lines and curved lines, and shapes with varying curvature. FIG. 3 is a front view showing one embodiment of the measuring device according to the present invention, and FIG. 4 is a side view of FIG. 3.

In Figures 3 and 4, 2 is laid horizontally and in a straight line.
The reference rail 3 is a support rail laid parallel to the reference rail 2, and 4 is a pedestal provided between the reference rail 2 and the support rail 3 to support the track girder 1c to be measured. Reference numeral 5 designates a moving frame which has a gate shape and is placed on the reference rail 2 and support rail 3 via guide wheels 6 and support wheels 7, and moves along the reference rail 2.

8 has an appropriate spacing from the top and side surfaces of the track girder 1c, and has a shape that straddles the track girder 1c.
This is a measurement frame that serves as a reference for measuring the cross-sectional dimension of c.

This measuring frame 8 has two sets of parallel links 9 attached to the moving frame 5.
and 10, and the parallel links 9 and 10 have a structure in which their inclinations are changed by operating cylinders 11 and 12 that follow the displacement of the measuring frame 8, respectively. Therefore, the measuring frame 8 can be moved vertically by operating the operating cylinders 11 and 12. Furthermore, stators 13 and 14 are provided on the upper and lateral inner surfaces of the measuring frame 8 in order to keep the relative position between the measuring frame 8 and the track girder 1c constant, and furthermore, stators 13 and 14 are provided on the inner surface of the upper and lateral sides of the measuring frame 8 and the track girder 1c. The displacement detectors 15, 16, 17, 18 are connected to the orbit girder 1c of the measurement frame 8 to detect the displacement of each point.
, and the respective displacements are detected using the measurement frame 8 as a reference. Further, the movable frame 5 is provided with displacement detectors 19 and 20 for detecting relative displacement of the measurement frame 8 with respect to the movable frame 5, and detects displacement in the vertical and horizontal directions. 21 is a drive device for moving the movable frame 5 along the reference rail 2, and 22 is a position detector that detects the position of the movable frame 5 driven by the drive device 21.

Note that the operating cylinders 11 and 12 are connected to parallel links 9 and 1.
In addition to adjusting the position of the measurement frame 8 by operating the 0, the distance between the track girder 1c and a specific part to be measured is kept constant by adjusting the internal pressure, etc., using the stators 13 and 14, and by applying an appropriate pressing force. The measuring frame 8 is configured to be pressed against the track girder 1c. In addition, the contact portions of the stators 13, 14 and the displacement detectors 15, 16, 17, 18 with the track girder 1c, and the contact portions of the displacement detectors 19, 20 with the measurement frame 8 are of a roller type so that they can roll, respectively. It is possible to drive the moving frame 5 while in contact. In such a configuration, when detecting the displacement of the track girder 1c, first, the moving frame 5 is moved along the reference rail 2 by the drive device 21, the moving distance at that time is detected by the position detector 22, and the moving frame 5 is fixed. Track girder 1c by children 13 and 14
Displacement detection is the displacement of the distance between a specific part to be measured (the upper right side surface and top surface of the track girder in the figure) and the measurement frame 8, which is maintained at a constant interval, and each part to be measured on the top surface and both side surfaces of the track girder 1c. Vessel 1
5, 16, 17, and 18.

Furthermore, the displacement of the distance between the moving frame 5 and a specific part to be measured of the track girder 1c, which is maintained at a constant distance from the measuring frame 8, is determined by a displacement that is provided on the moving frame 5 and detects the displacement between the measuring frame 8 and the moving frame 5. It is detected by detectors 19 and 20. and,
The displacement detectors 15, 16, 17, 18 and the displacement detector 1
By combining the detection results of 9 and 20, it is possible to detect the longitudinal displacement of the track girder 1c and the displacement of each part in each cross section. Next, the relationship between the displacement detection results and the dimensions of the track girder will be explained with reference to a cross-sectional view showing the state of displacement detection by the measuring device of the present invention shown in FIG.

In the figure, the relative position of the measurement frame 8 with respect to the track girder 1c is determined by stators 13 and 14, and the measurement frame 1c is always held vertically. Therefore, by setting the position of the reference point of the displacement detector 16 at the same length as the stator 13, the detected displacement Δh of the displacement detector 16 can be used to determine the position of the track girder 1.
The inclination angle of the upper surface c is determined by Tan-1 (Δh/B). Furthermore, if the reference point of the displacement detector 15 is set to have the same length as the stator 14, the error angle between the right side of the track girder 1c and the vertical plane is Tan due to the detected displacement Δb1 of the displacement detector 15.
-1 (Δb1/H), and the error in the angle formed with the upper surface of the track girder 1c is determined by the difference between the two. Displacement detector 17
Set the distance between the and stator 14 to be the regular width W of the track girder 1c, use this point as the reference point of the displacement detector 17, and adjust the displacement detector 18 to the same length. Accordingly, the error in the width of the track girder 1c and the inclination angle of the left side surface can be determined as follows. That is, the width Wu in the horizontal direction between the guide surfaces b is determined by the detected displacement Δ■ of the displacement detector 17, so that Wu=W
+ΔB2, horizontal width W between stable surfaces c
L is the detected displacement Δ? of the displacement detectors 15 and 18? and Δ
From F, WL=W+(Δto+ΔY)2). The error angle between the left side and the vertical plane is Tan-1 (Δ■ - ΔB2/H)
The error in the angle with the running surface a is determined by the difference from the inclination angle of the running surface a. Further, the widths of the guide surface b and the stability surface c in the direction parallel to the running surface a are determined by correcting them by the inclination angle of the running surface a, and the inclination angle of the upper surface a is Tan-1 (Δh/B) = θ Then, guide surface b1
The width of the stable surface c in the direction parallel to the running surface a is Wu
/COsθ, W is calculated as /COsθ. On the other hand, since the displacement of the measurement frame 8 is detected as a relative displacement with the moving frame 5 moving along the reference rail 2, it directly indicates the displacement from the reference rail 2, and the longitudinal curve displacement and vertical displacement of the track girder 1c. can be detected. These detection operations are performed as the moving frame 5 moves, and by combining them with the detection results of the position detector 22, continuous measurements can be performed. According to such a configuration, the longitudinal displacement of the track girder 1c is detected by the relative displacement between the moving frame 5 moving on the reference rail 2 and the measurement frame 8, and the cross-sectional dimension of the track girder 1c is determined by the measurement frame 8. By adopting a configuration in which detection is performed based on the reference value, measurement accuracy can be improved, and by using a roller type contact portion of the detector, continuous measurement can be performed.

Next, FIG. 6 shows an example of a combination of data processing devices.

Reference numeral 25 denotes a measuring device according to the present invention, and 26 performs arithmetic processing on the displacement and position detection results of each point detected by the measuring device, and compares them with allowable dimension data stored in a storage device 27.
The arithmetic device 28 for making judgments is an input/output device for printing out the arithmetic and judgment results and inputting allowable dimension data according to the specifications of the object to be inspected.

Reference numeral 29 denotes a power supply device for supplying the necessary power to these processing devices.

In the configuration in which the above devices are connected, when measuring the track girder 1c, first, the input/output device 28 connects the arithmetic device 2.
6, the allowable dimension data is input to the storage device 27 and stored.

Then, the measuring device 25 inspects the track girder 1c. Displacement detectors 15, 16, 1 of the measuring device 25 at this time
7, 18, 19, 20 and the position detector 22 are compared with allowable dimension data in the storage device 27 by the arithmetic device 26, and the determination results are printed out by the input/output device 28. According to such a configuration, when the measuring device is operated along the track girder 1c, a measurement result can be obtained instantaneously, and the test of the track girder 1c can be carried out continuously and easily. As explained above, according to the present invention, it is possible to simultaneously detect the cross-sectional dimension and longitudinal displacement of the object to be inspected, and to measure it continuously as necessary. By installing a data processing device such as the following, automation can be easily achieved and efficiency can be further improved. Furthermore, since the cross-sectional dimensions of the object to be inspected are measured using the measurement frame as a reference, high accuracy can be obtained.

[Brief explanation of drawings]

) Fig. 1 is a sectional view of a monorail track girder, Fig. 2 is a perspective view showing an example of the shape of the track girder, Fig. 3 is a front view showing an embodiment of the inspection device of the present invention, and Fig. 4 is a cross-sectional view of a monorail track girder. Figure 3 is a side view, Figure 5 is a sectional view showing the relationship between the displacement detection results and the track girder, and I
Figure g6 is a circuit diagram showing an embodiment in which a measuring device is connected to a data processing device. 1, 1a, 1b, 1c... Orbit girder, 2...
...Reference rail, 3...Support rail, 4...
... pedestal, 5... moving frame, 6... guide wheel, 7... support wheel, 8... measuring frame, 9, 10...・Parallel link, 11, 12...
...operation cylinder, 13, 14... stator,
15, 16, 17, 18, 19, 20... Displacement detector, 21... Drive device, 22... Position detector, 26... Arithmetic device, 27. ... Storage device, 28 ... Input/output device, 29 ... Power supply device.

Claims (1)

[Claims] 1. A reference rail is provided corresponding to the longitudinal direction of the object to be tested and is provided in a straight line separately from the object to be tested, and the measurement frame is made to correspond to the object to be tested. a stator that is attached to the movable frame so as to be movable along a specific part of the object to be measured, and maintains a distance between the specific part to be measured of the object to be measured and the measurement frame, and the object to be tested. A displacement detector for detecting displacement between the part to be measured and the measurement frame is attached to the measurement frame, a displacement detector for detecting displacement of the interval between the measurement frame and the moving frame is attached between both the measurement frame and the moving frame, A measuring device for a long object, characterized in that it is equipped with a position detector that detects the amount of movement of a moving frame. 2. The measuring device for a long object according to claim 1, wherein the measuring frame is supported on a movable frame by a plurality of sets of parallel links and an operation cylinder that follows the displacement of the measuring frame. 3. Provide a reference rail that corresponds to the longitudinal direction of the object to be inspected and is provided in a straight line separately from the object to be inspected;
A measurement frame is made to correspond to the object to be tested and is attached to the moving frame so as to be movable along a specific part to be measured of the object to be tested, and the distance between the specific part to be measured of the object to be tested and the measurement frame is fixed. A displacement detector that detects the displacement between the measuring frame and the stator that maintains the distance between the measuring frame and the measuring part of the object to be measured is attached to the measuring frame, and a displacement detector that detects the displacement of the interval between the measuring frame and the moving frame is measured. The displacement detector and the position detector of a measuring device equipped with a position detector attached between both the frame and the moving frame and detecting the amount of movement of the moving frame are connected to an arithmetic device, and the arithmetic device is provided with a storage device and a position detector. 1. An inspection device for a long object, characterized in that an input/output device is connected, and the inspection device, arithmetic device, and input/output device are connected to a power supply device.